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 CONSTANT_CLASS_DESCRIPTORS 63
148
149 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
150 assert((bad_constant == JVM_CONSTANT_Module ||
151 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
152 "Unexpected bad constant pool entry");
153 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
154 }
155
156 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
157 ConstantPool* cp,
158 const int length,
159 TRAPS) {
160 assert(stream != NULL, "invariant");
161 assert(cp != NULL, "invariant");
162
163 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
164 // this function (_current can be allocated in a register, with scalar
165 // replacement of aggregates). The _current pointer is copied back to
166 // stream() when this function returns. DON'T call another method within
167 // this method that uses stream().
168 const ClassFileStream cfs1 = *stream;
169 const ClassFileStream* const cfs = &cfs1;
170
171 assert(cfs->allocated_on_stack_or_embedded(), "should be local");
172 debug_only(const u1* const old_current = stream->current();)
173
174 // Used for batching symbol allocations.
175 const char* names[SymbolTable::symbol_alloc_batch_size];
176 int lengths[SymbolTable::symbol_alloc_batch_size];
177 int indices[SymbolTable::symbol_alloc_batch_size];
178 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
179 int names_count = 0;
180
181 // parsing Index 0 is unused
182 for (int index = 1; index < length; index++) {
183 // Each of the following case guarantees one more byte in the stream
184 // for the following tag or the access_flags following constant pool,
185 // so we don't need bounds-check for reading tag.
186 const u1 tag = cfs->get_u1_fast();
187 switch (tag) {
188 case JVM_CONSTANT_Class: {
189 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
190 const u2 name_index = cfs->get_u2_fast();
191 cp->klass_index_at_put(index, name_index);
192 break;
193 }
194 case JVM_CONSTANT_Fieldref: {
195 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
196 const u2 class_index = cfs->get_u2_fast();
197 const u2 name_and_type_index = cfs->get_u2_fast();
198 cp->field_at_put(index, class_index, name_and_type_index);
199 break;
200 }
201 case JVM_CONSTANT_Methodref: {
202 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
203 const u2 class_index = cfs->get_u2_fast();
204 const u2 name_and_type_index = cfs->get_u2_fast();
205 cp->method_at_put(index, class_index, name_and_type_index);
206 break;
207 }
208 case JVM_CONSTANT_InterfaceMethodref: {
209 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
210 const u2 class_index = cfs->get_u2_fast();
211 const u2 name_and_type_index = cfs->get_u2_fast();
212 cp->interface_method_at_put(index, class_index, name_and_type_index);
213 break;
214 }
215 case JVM_CONSTANT_String : {
216 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
217 const u2 string_index = cfs->get_u2_fast();
218 cp->string_index_at_put(index, string_index);
219 break;
220 }
221 case JVM_CONSTANT_MethodHandle :
222 case JVM_CONSTANT_MethodType: {
223 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
224 classfile_parse_error(
225 "Class file version does not support constant tag %u in class file %s",
226 tag, THREAD);
227 return;
228 }
229 if (tag == JVM_CONSTANT_MethodHandle) {
230 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
231 const u1 ref_kind = cfs->get_u1_fast();
232 const u2 method_index = cfs->get_u2_fast();
233 cp->method_handle_index_at_put(index, ref_kind, method_index);
234 }
235 else if (tag == JVM_CONSTANT_MethodType) {
236 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
237 const u2 signature_index = cfs->get_u2_fast();
238 cp->method_type_index_at_put(index, signature_index);
239 }
240 else {
241 ShouldNotReachHere();
242 }
243 break;
244 }
245 case JVM_CONSTANT_Dynamic : {
246 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
247 classfile_parse_error(
248 "Class file version does not support constant tag %u in class file %s",
249 tag, THREAD);
250 return;
251 }
252 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
253 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
254 const u2 name_and_type_index = cfs->get_u2_fast();
255 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
256 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
257 }
258 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
259 break;
260 }
261 case JVM_CONSTANT_InvokeDynamic : {
262 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
263 classfile_parse_error(
264 "Class file version does not support constant tag %u in class file %s",
265 tag, THREAD);
266 return;
267 }
268 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
269 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
270 const u2 name_and_type_index = cfs->get_u2_fast();
271 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
272 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
273 }
274 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
275 break;
276 }
277 case JVM_CONSTANT_Integer: {
278 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
279 const u4 bytes = cfs->get_u4_fast();
280 cp->int_at_put(index, (jint)bytes);
281 break;
282 }
283 case JVM_CONSTANT_Float: {
284 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
285 const u4 bytes = cfs->get_u4_fast();
286 cp->float_at_put(index, *(jfloat*)&bytes);
287 break;
288 }
289 case JVM_CONSTANT_Long: {
290 // A mangled type might cause you to overrun allocated memory
291 guarantee_property(index + 1 < length,
292 "Invalid constant pool entry %u in class file %s",
293 index,
294 CHECK);
295 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
296 const u8 bytes = cfs->get_u8_fast();
297 cp->long_at_put(index, bytes);
298 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
299 break;
300 }
301 case JVM_CONSTANT_Double: {
302 // A mangled type might cause you to overrun allocated memory
303 guarantee_property(index+1 < length,
304 "Invalid constant pool entry %u in class file %s",
305 index,
306 CHECK);
307 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
308 const u8 bytes = cfs->get_u8_fast();
309 cp->double_at_put(index, *(jdouble*)&bytes);
310 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
311 break;
312 }
313 case JVM_CONSTANT_NameAndType: {
314 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
315 const u2 name_index = cfs->get_u2_fast();
316 const u2 signature_index = cfs->get_u2_fast();
317 cp->name_and_type_at_put(index, name_index, signature_index);
318 break;
319 }
320 case JVM_CONSTANT_Utf8 : {
321 cfs->guarantee_more(2, CHECK); // utf8_length
322 u2 utf8_length = cfs->get_u2_fast();
323 const u1* utf8_buffer = cfs->current();
324 assert(utf8_buffer != NULL, "null utf8 buffer");
325 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
326 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
327 cfs->skip_u1_fast(utf8_length);
328
329 // Before storing the symbol, make sure it's legal
330 if (_need_verify) {
331 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
332 }
333
334 unsigned int hash;
335 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
336 utf8_length,
337 hash);
338 if (result == NULL) {
339 names[names_count] = (const char*)utf8_buffer;
340 lengths[names_count] = utf8_length;
341 indices[names_count] = index;
342 hashValues[names_count++] = hash;
343 if (names_count == SymbolTable::symbol_alloc_batch_size) {
344 SymbolTable::new_symbols(_loader_data,
345 constantPoolHandle(THREAD, cp),
346 names_count,
347 names,
348 lengths,
349 indices,
350 hashValues);
351 names_count = 0;
352 }
353 } else {
354 cp->symbol_at_put(index, result);
355 }
356 break;
357 }
358 case JVM_CONSTANT_Module:
359 case JVM_CONSTANT_Package: {
360 // Record that an error occurred in these two cases but keep parsing so
361 // that ACC_Module can be checked for in the access_flags. Need to
362 // throw NoClassDefFoundError in that case.
363 if (_major_version >= JAVA_9_VERSION) {
364 cfs->guarantee_more(3, CHECK);
365 cfs->get_u2_fast();
366 set_class_bad_constant_seen(tag);
367 break;
368 }
369 }
370 default: {
371 classfile_parse_error("Unknown constant tag %u in class file %s",
372 tag,
373 THREAD);
374 return;
375 }
376 } // end of switch(tag)
377 } // end of for
378
379 // Allocate the remaining symbols
380 if (names_count > 0) {
381 SymbolTable::new_symbols(_loader_data,
382 constantPoolHandle(THREAD, cp),
383 names_count,
384 names,
385 lengths,
386 indices,
387 hashValues);
388 }
389
390 // Copy _current pointer of local copy back to stream.
391 assert(stream->current() == old_current, "non-exclusive use of stream");
392 stream->set_current(cfs1.current());
393
394 }
395
396 static inline bool valid_cp_range(int index, int length) {
397 return (index > 0 && index < length);
398 }
399
400 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
401 assert(cp != NULL, "invariant");
402 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
403 return cp->symbol_at(index);
404 }
405 return NULL;
406 }
407
408 #ifdef ASSERT
409 PRAGMA_DIAG_PUSH
410 PRAGMA_FORMAT_NONLITERAL_IGNORED
411 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
412 ResourceMark rm(THREAD);
413 fatal(msg, _class_name->as_C_string());
414 }
415
416 void ClassFileParser::report_assert_property_failure(const char* msg,
417 int index,
418 TRAPS) const {
419 ResourceMark rm(THREAD);
420 fatal(msg, index, _class_name->as_C_string());
421 }
422 PRAGMA_DIAG_POP
423 #endif
424
425 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
426 ConstantPool* const cp,
427 const int length,
428 TRAPS) {
429 assert(cp != NULL, "invariant");
430 assert(stream != NULL, "invariant");
431
432 // parsing constant pool entries
433 parse_constant_pool_entries(stream, cp, length, CHECK);
434 if (class_bad_constant_seen() != 0) {
435 // a bad CP entry has been detected previously so stop parsing and just return.
436 return;
437 }
438
439 int index = 1; // declared outside of loops for portability
440 int num_klasses = 0;
441
442 // first verification pass - validate cross references
443 // and fixup class and string constants
444 for (index = 1; index < length; index++) { // Index 0 is unused
445 const jbyte tag = cp->tag_at(index).value();
446 switch (tag) {
447 case JVM_CONSTANT_Class: {
448 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
449 break;
450 }
451 case JVM_CONSTANT_Fieldref:
452 // fall through
453 case JVM_CONSTANT_Methodref:
454 // fall through
455 case JVM_CONSTANT_InterfaceMethodref: {
456 if (!_need_verify) break;
457 const int klass_ref_index = cp->klass_ref_index_at(index);
458 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
459 check_property(valid_klass_reference_at(klass_ref_index),
460 "Invalid constant pool index %u in class file %s",
461 klass_ref_index, CHECK);
462 check_property(valid_cp_range(name_and_type_ref_index, length) &&
463 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
464 "Invalid constant pool index %u in class file %s",
465 name_and_type_ref_index, CHECK);
466 break;
467 }
468 case JVM_CONSTANT_String: {
469 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
470 break;
471 }
472 case JVM_CONSTANT_Integer:
473 break;
474 case JVM_CONSTANT_Float:
475 break;
476 case JVM_CONSTANT_Long:
477 case JVM_CONSTANT_Double: {
478 index++;
479 check_property(
480 (index < length && cp->tag_at(index).is_invalid()),
481 "Improper constant pool long/double index %u in class file %s",
482 index, CHECK);
483 break;
484 }
485 case JVM_CONSTANT_NameAndType: {
486 if (!_need_verify) break;
487 const int name_ref_index = cp->name_ref_index_at(index);
488 const int signature_ref_index = cp->signature_ref_index_at(index);
489 check_property(valid_symbol_at(name_ref_index),
490 "Invalid constant pool index %u in class file %s",
491 name_ref_index, CHECK);
492 check_property(valid_symbol_at(signature_ref_index),
493 "Invalid constant pool index %u in class file %s",
494 signature_ref_index, CHECK);
495 break;
496 }
497 case JVM_CONSTANT_Utf8:
498 break;
499 case JVM_CONSTANT_UnresolvedClass: // fall-through
500 case JVM_CONSTANT_UnresolvedClassInError: {
501 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
502 break;
503 }
504 case JVM_CONSTANT_ClassIndex: {
505 const int class_index = cp->klass_index_at(index);
506 check_property(valid_symbol_at(class_index),
507 "Invalid constant pool index %u in class file %s",
508 class_index, CHECK);
509
510 Symbol* const name = cp->symbol_at(class_index);
511 const unsigned int name_len = name->utf8_length();
512 if (name->is_Q_signature()) {
513 cp->unresolved_qdescriptor_at_put(index, class_index, num_klasses++);
514 } else {
515 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
516 }
517 break;
518 }
519 case JVM_CONSTANT_StringIndex: {
520 const int string_index = cp->string_index_at(index);
521 check_property(valid_symbol_at(string_index),
522 "Invalid constant pool index %u in class file %s",
523 string_index, CHECK);
524 Symbol* const sym = cp->symbol_at(string_index);
525 cp->unresolved_string_at_put(index, sym);
526 break;
527 }
528 case JVM_CONSTANT_MethodHandle: {
529 const int ref_index = cp->method_handle_index_at(index);
530 check_property(valid_cp_range(ref_index, length),
531 "Invalid constant pool index %u in class file %s",
532 ref_index, CHECK);
533 const constantTag tag = cp->tag_at(ref_index);
534 const int ref_kind = cp->method_handle_ref_kind_at(index);
535
536 switch (ref_kind) {
537 case JVM_REF_getField:
538 case JVM_REF_getStatic:
539 case JVM_REF_putField:
540 case JVM_REF_putStatic: {
541 check_property(
542 tag.is_field(),
543 "Invalid constant pool index %u in class file %s (not a field)",
544 ref_index, CHECK);
545 break;
546 }
547 case JVM_REF_invokeVirtual:
548 case JVM_REF_newInvokeSpecial: {
549 check_property(
550 tag.is_method(),
551 "Invalid constant pool index %u in class file %s (not a method)",
552 ref_index, CHECK);
553 break;
554 }
555 case JVM_REF_invokeStatic:
556 case JVM_REF_invokeSpecial: {
557 check_property(
558 tag.is_method() ||
559 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
560 "Invalid constant pool index %u in class file %s (not a method)",
561 ref_index, CHECK);
562 break;
563 }
564 case JVM_REF_invokeInterface: {
565 check_property(
566 tag.is_interface_method(),
567 "Invalid constant pool index %u in class file %s (not an interface method)",
568 ref_index, CHECK);
569 break;
570 }
571 default: {
572 classfile_parse_error(
573 "Bad method handle kind at constant pool index %u in class file %s",
574 index, THREAD);
575 return;
576 }
577 } // switch(refkind)
578 // Keep the ref_index unchanged. It will be indirected at link-time.
579 break;
580 } // case MethodHandle
581 case JVM_CONSTANT_MethodType: {
582 const int ref_index = cp->method_type_index_at(index);
583 check_property(valid_symbol_at(ref_index),
584 "Invalid constant pool index %u in class file %s",
585 ref_index, CHECK);
586 break;
587 }
588 case JVM_CONSTANT_Dynamic: {
589 const int name_and_type_ref_index =
590 cp->bootstrap_name_and_type_ref_index_at(index);
591
592 check_property(valid_cp_range(name_and_type_ref_index, length) &&
593 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
594 "Invalid constant pool index %u in class file %s",
595 name_and_type_ref_index, CHECK);
596 // bootstrap specifier index must be checked later,
597 // when BootstrapMethods attr is available
598
599 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
600 cp->set_has_dynamic_constant();
601 break;
602 }
603 case JVM_CONSTANT_InvokeDynamic: {
604 const int name_and_type_ref_index =
605 cp->bootstrap_name_and_type_ref_index_at(index);
606
607 check_property(valid_cp_range(name_and_type_ref_index, length) &&
608 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
609 "Invalid constant pool index %u in class file %s",
610 name_and_type_ref_index, CHECK);
611 // bootstrap specifier index must be checked later,
612 // when BootstrapMethods attr is available
613 break;
614 }
615 default: {
616 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
617 ShouldNotReachHere();
618 break;
619 }
620 } // switch(tag)
621 } // end of for
622
623 cp->allocate_resolved_klasses(_loader_data, num_klasses, CHECK);
624
625 if (!_need_verify) {
626 return;
627 }
628
629 // second verification pass - checks the strings are of the right format.
630 // but not yet to the other entries
631 for (index = 1; index < length; index++) {
632 const jbyte tag = cp->tag_at(index).value();
633 switch (tag) {
634 case JVM_CONSTANT_UnresolvedClass: {
635 const Symbol* const class_name = cp->klass_name_at(index);
636 // check the name
637 verify_legal_class_name(class_name, CHECK);
638 break;
639 }
640 case JVM_CONSTANT_NameAndType: {
641 if (_need_verify) {
642 const int sig_index = cp->signature_ref_index_at(index);
643 const int name_index = cp->name_ref_index_at(index);
644 const Symbol* const name = cp->symbol_at(name_index);
645 const Symbol* const sig = cp->symbol_at(sig_index);
646 guarantee_property(sig->utf8_length() != 0,
647 "Illegal zero length constant pool entry at %d in class %s",
648 sig_index, CHECK);
649 guarantee_property(name->utf8_length() != 0,
650 "Illegal zero length constant pool entry at %d in class %s",
651 name_index, CHECK);
652
653 if (Signature::is_method(sig)) {
654 // Format check method name and signature
655 verify_legal_method_name(name, CHECK);
656 verify_legal_method_signature(name, sig, CHECK);
657 } else {
658 // Format check field name and signature
659 verify_legal_field_name(name, CHECK);
660 verify_legal_field_signature(name, sig, CHECK);
661 }
662 }
663 break;
664 }
665 case JVM_CONSTANT_Dynamic: {
666 const int name_and_type_ref_index =
667 cp->name_and_type_ref_index_at(index);
668 // already verified to be utf8
669 const int name_ref_index =
670 cp->name_ref_index_at(name_and_type_ref_index);
671 // already verified to be utf8
672 const int signature_ref_index =
673 cp->signature_ref_index_at(name_and_type_ref_index);
674 const Symbol* const name = cp->symbol_at(name_ref_index);
675 const Symbol* const signature = cp->symbol_at(signature_ref_index);
676 if (_need_verify) {
677 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
678 // Need only to be sure signature is the right type.
679 if (Signature::is_method(signature)) {
680 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
681 }
682 }
683 break;
684 }
685 case JVM_CONSTANT_InvokeDynamic:
686 case JVM_CONSTANT_Fieldref:
687 case JVM_CONSTANT_Methodref:
688 case JVM_CONSTANT_InterfaceMethodref: {
689 const int name_and_type_ref_index =
690 cp->name_and_type_ref_index_at(index);
691 // already verified to be utf8
692 const int name_ref_index =
693 cp->name_ref_index_at(name_and_type_ref_index);
694 // already verified to be utf8
695 const int signature_ref_index =
696 cp->signature_ref_index_at(name_and_type_ref_index);
697 const Symbol* const name = cp->symbol_at(name_ref_index);
698 const Symbol* const signature = cp->symbol_at(signature_ref_index);
699 if (tag == JVM_CONSTANT_Fieldref) {
700 if (_need_verify) {
701 // Field name and signature are verified above, when iterating NameAndType_info.
702 // Need only to be sure signature is non-zero length and the right type.
703 if (Signature::is_method(signature)) {
704 throwIllegalSignature("Field", name, signature, CHECK);
705 }
706 }
707 } else {
708 if (_need_verify) {
709 // Method name and signature are individually verified above, when iterating
710 // NameAndType_info. Need to check here that signature is non-zero length and
711 // the right type.
712 if (!Signature::is_method(signature)) {
713 throwIllegalSignature("Method", name, signature, CHECK);
714 }
715 }
716 // If a class method name begins with '<', it must be "<init>" and have void signature
717 // unless it's an inline type.
718 const unsigned int name_len = name->utf8_length();
719 if (tag == JVM_CONSTANT_Methodref && name_len != 0 &&
720 name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
721 if (name != vmSymbols::object_initializer_name()) {
722 classfile_parse_error(
723 "Bad method name at constant pool index %u in class file %s",
724 name_ref_index, THREAD);
725 return;
726 } else if (!Signature::is_void_method(signature)) {
727 // if return type is non-void then it cannot be a basic primitive
728 // and primitve types must be supported.
729 if (!signature->ends_with(JVM_SIGNATURE_ENDCLASS) || !EnableValhalla) {
730 throwIllegalSignature("Method", name, signature, CHECK);
731 }
732 }
733 }
734 }
735 break;
736 }
737 case JVM_CONSTANT_MethodHandle: {
738 const int ref_index = cp->method_handle_index_at(index);
739 const int ref_kind = cp->method_handle_ref_kind_at(index);
740 switch (ref_kind) {
741 case JVM_REF_invokeVirtual:
742 case JVM_REF_invokeStatic:
743 case JVM_REF_invokeSpecial:
744 case JVM_REF_newInvokeSpecial: {
745 const int name_and_type_ref_index =
746 cp->name_and_type_ref_index_at(ref_index);
747 const int name_ref_index =
748 cp->name_ref_index_at(name_and_type_ref_index);
749 const Symbol* const name = cp->symbol_at(name_ref_index);
750 if (name != vmSymbols::object_initializer_name()) {
751 if (ref_kind == JVM_REF_newInvokeSpecial) {
752 classfile_parse_error(
753 "Bad constructor name at constant pool index %u in class file %s",
754 name_ref_index, THREAD);
755 return;
756 }
757 } else {
758 // The allowed invocation mode of <init> depends on its signature.
759 // This test corresponds to verify_invoke_instructions in the verifier.
760 const int signature_ref_index =
761 cp->signature_ref_index_at(name_and_type_ref_index);
762 const Symbol* const signature = cp->symbol_at(signature_ref_index);
763 if (signature->is_void_method_signature()
764 && ref_kind == JVM_REF_newInvokeSpecial) {
765 // OK, could be a constructor call
766 } else if (!signature->is_void_method_signature()
767 && ref_kind == JVM_REF_invokeStatic) {
768 // also OK, could be a static factory call
769 } else {
770 classfile_parse_error(
771 "Bad method name at constant pool index %u in class file %s",
772 name_ref_index, THREAD);
773 return;
774 }
775 }
776 break;
777 }
778 // Other ref_kinds are already fully checked in previous pass.
779 } // switch(ref_kind)
780 break;
781 }
782 case JVM_CONSTANT_MethodType: {
783 const Symbol* const no_name = vmSymbols::type_name(); // place holder
784 const Symbol* const signature = cp->method_type_signature_at(index);
785 verify_legal_method_signature(no_name, signature, CHECK);
786 break;
787 }
788 case JVM_CONSTANT_Utf8: {
789 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
790 }
791 } // switch(tag)
792 } // end of for
793 }
794
795 class NameSigHash: public ResourceObj {
796 public:
797 const Symbol* _name; // name
798 const Symbol* _sig; // signature
799 NameSigHash* _next; // Next entry in hash table
800 };
801
802 static const int HASH_ROW_SIZE = 256;
803
804 static unsigned int hash(const Symbol* name, const Symbol* sig) {
805 unsigned int raw_hash = 0;
806 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
807 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
808
809 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
810 }
811
812
813 static void initialize_hashtable(NameSigHash** table) {
814 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
815 }
816 // Return false if the name/sig combination is found in table.
817 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
818 // The old format checker uses heap sort to find duplicates.
819 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
820 // of table since we don't expect Symbol*'s to move.
821 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
822 assert(name != NULL, "name in constant pool is NULL");
823
824 // First lookup for duplicates
825 int index = hash(name, sig);
826 NameSigHash* entry = table[index];
827 while (entry != NULL) {
828 if (entry->_name == name && entry->_sig == sig) {
829 return false;
830 }
831 entry = entry->_next;
832 }
833
834 // No duplicate is found, allocate a new entry and fill it.
835 entry = new NameSigHash();
836 entry->_name = name;
837 entry->_sig = sig;
838
839 // Insert into hash table
840 entry->_next = table[index];
841 table[index] = entry;
842
843 return true;
844 }
845
846 // Side-effects: populates the _local_interfaces field
847 void ClassFileParser::parse_interfaces(const ClassFileStream* stream,
848 int itfs_len,
849 ConstantPool* cp,
850 bool* const has_nonstatic_concrete_methods,
851 // FIXME: lots of these functions
852 // declare their parameters as const,
853 // which adds only noise to the code.
854 // Remove the spurious const modifiers.
855 // Many are of the form "const int x"
856 // or "T* const x".
857 bool* const is_declared_atomic,
858 TRAPS) {
859 assert(stream != NULL, "invariant");
860 assert(cp != NULL, "invariant");
861 assert(has_nonstatic_concrete_methods != NULL, "invariant");
862
863 if (itfs_len == 0) {
864 _temp_local_interfaces = new GrowableArray<InstanceKlass*>(0);
865 } else {
866 assert(itfs_len > 0, "only called for len>0");
867 _temp_local_interfaces = new GrowableArray<InstanceKlass*>(itfs_len);
868 int index = 0;
869 for (index = 0; index < itfs_len; index++) {
870 const u2 interface_index = stream->get_u2(CHECK);
871 Klass* interf;
872 check_property(
873 valid_klass_reference_at(interface_index),
874 "Interface name has bad constant pool index %u in class file %s",
875 interface_index, CHECK);
876 if (cp->tag_at(interface_index).is_klass()) {
877 interf = cp->resolved_klass_at(interface_index);
878 } else {
879 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
880
881 // Don't need to check legal name because it's checked when parsing constant pool.
882 // But need to make sure it's not an array type.
883 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
884 "Bad interface name in class file %s", CHECK);
885
886 // Call resolve_super so class circularity is checked
887 interf = SystemDictionary::resolve_super_or_fail(
888 _class_name,
889 unresolved_klass,
890 Handle(THREAD, _loader_data->class_loader()),
891 _protection_domain,
892 false,
893 CHECK);
894 }
895
896 if (!interf->is_interface()) {
897 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
898 err_msg("class %s can not implement %s, because it is not an interface (%s)",
899 _class_name->as_klass_external_name(),
900 interf->external_name(),
901 interf->class_in_module_of_loader()));
902 }
903
904 InstanceKlass* ik = InstanceKlass::cast(interf);
905 if (is_inline_type() && ik->invalid_inline_super()) {
906 ResourceMark rm(THREAD);
907 Exceptions::fthrow(
908 THREAD_AND_LOCATION,
909 vmSymbols::java_lang_IncompatibleClassChangeError(),
910 "Inline type %s has an identity type as supertype",
911 _class_name->as_klass_external_name());
912 return;
913 }
914 if (ik->invalid_inline_super()) {
915 set_invalid_inline_super();
916 }
917 if (ik->has_nonstatic_concrete_methods()) {
918 *has_nonstatic_concrete_methods = true;
919 }
920 if (ik->is_declared_atomic()) {
921 *is_declared_atomic = true;
922 }
923 _temp_local_interfaces->append(ik);
924 }
925
926 if (!_need_verify || itfs_len <= 1) {
927 return;
928 }
929
930 // Check if there's any duplicates in interfaces
931 ResourceMark rm(THREAD);
932 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
933 NameSigHash*,
934 HASH_ROW_SIZE);
935 initialize_hashtable(interface_names);
936 bool dup = false;
937 const Symbol* name = NULL;
938 {
939 debug_only(NoSafepointVerifier nsv;)
940 for (index = 0; index < itfs_len; index++) {
941 const InstanceKlass* const k = _temp_local_interfaces->at(index);
942 name = k->name();
943 // If no duplicates, add (name, NULL) in hashtable interface_names.
944 if (!put_after_lookup(name, NULL, interface_names)) {
945 dup = true;
946 break;
947 }
948 }
949 }
950 if (dup) {
951 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
952 name->as_C_string(), THREAD);
953 }
954 }
955 }
956
957 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
958 int constantvalue_index,
959 int signature_index,
960 TRAPS) const {
961 // Make sure the constant pool entry is of a type appropriate to this field
962 guarantee_property(
963 (constantvalue_index > 0 &&
964 constantvalue_index < cp->length()),
965 "Bad initial value index %u in ConstantValue attribute in class file %s",
966 constantvalue_index, CHECK);
967
968 const constantTag value_type = cp->tag_at(constantvalue_index);
969 switch(cp->basic_type_for_signature_at(signature_index)) {
970 case T_LONG: {
971 guarantee_property(value_type.is_long(),
972 "Inconsistent constant value type in class file %s",
973 CHECK);
974 break;
975 }
976 case T_FLOAT: {
977 guarantee_property(value_type.is_float(),
978 "Inconsistent constant value type in class file %s",
979 CHECK);
980 break;
981 }
982 case T_DOUBLE: {
983 guarantee_property(value_type.is_double(),
984 "Inconsistent constant value type in class file %s",
985 CHECK);
986 break;
987 }
988 case T_BYTE:
989 case T_CHAR:
990 case T_SHORT:
991 case T_BOOLEAN:
992 case T_INT: {
993 guarantee_property(value_type.is_int(),
994 "Inconsistent constant value type in class file %s",
995 CHECK);
996 break;
997 }
998 case T_OBJECT: {
999 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1000 && value_type.is_string()),
1001 "Bad string initial value in class file %s",
1002 CHECK);
1003 break;
1004 }
1005 default: {
1006 classfile_parse_error("Unable to set initial value %u in class file %s",
1007 constantvalue_index,
1008 THREAD);
1009 }
1010 }
1011 }
1012
1013 class AnnotationCollector : public ResourceObj{
1014 public:
1015 enum Location { _in_field, _in_method, _in_class };
1016 enum ID {
1017 _unknown = 0,
1018 _method_CallerSensitive,
1019 _method_ForceInline,
1020 _method_DontInline,
1021 _method_InjectedProfile,
1022 _method_LambdaForm_Compiled,
1023 _method_Hidden,
1024 _method_Scoped,
1025 _method_IntrinsicCandidate,
1026 _jdk_internal_vm_annotation_Contended,
1027 _field_Stable,
1028 _jdk_internal_vm_annotation_ReservedStackAccess,
1029 _jdk_internal_ValueBased,
1030 _annotation_LIMIT
1031 };
1032 const Location _location;
1033 int _annotations_present;
1034 u2 _contended_group;
1035
1036 AnnotationCollector(Location location)
1037 : _location(location), _annotations_present(0), _contended_group(0)
1038 {
1039 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1040 }
1041 // If this annotation name has an ID, report it (or _none).
1042 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, bool can_access_vm_annotations);
1043 // Set the annotation name:
1044 void set_annotation(ID id) {
1045 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1046 _annotations_present |= nth_bit((int)id);
1047 }
1048
1049 void remove_annotation(ID id) {
1050 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1051 _annotations_present &= ~nth_bit((int)id);
1052 }
1053
1054 // Report if the annotation is present.
1055 bool has_any_annotations() const { return _annotations_present != 0; }
1056 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1057
1058 void set_contended_group(u2 group) { _contended_group = group; }
1059 u2 contended_group() const { return _contended_group; }
1060
1061 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1062
1063 void set_stable(bool stable) { set_annotation(_field_Stable); }
1064 bool is_stable() const { return has_annotation(_field_Stable); }
1065 };
1066
1067 // This class also doubles as a holder for metadata cleanup.
1068 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1069 private:
1070 ClassLoaderData* _loader_data;
1071 AnnotationArray* _field_annotations;
1072 AnnotationArray* _field_type_annotations;
1073 public:
1074 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1075 AnnotationCollector(_in_field),
1076 _loader_data(loader_data),
1077 _field_annotations(NULL),
1078 _field_type_annotations(NULL) {}
1079 ~FieldAnnotationCollector();
1080 void apply_to(FieldInfo* f);
1081 AnnotationArray* field_annotations() { return _field_annotations; }
1082 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1083
1084 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1085 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1086 };
1087
1088 class MethodAnnotationCollector : public AnnotationCollector{
1089 public:
1090 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1091 void apply_to(const methodHandle& m);
1092 };
1093
1094 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1095 public:
1096 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1097 void apply_to(InstanceKlass* ik);
1098 };
1099
1100
1101 static int skip_annotation_value(const u1*, int, int); // fwd decl
1102
1103 // Safely increment index by val if does not pass limit
1104 #define SAFE_ADD(index, limit, val) \
1105 if (index >= limit - val) return limit; \
1106 index += val;
1107
1108 // Skip an annotation. Return >=limit if there is any problem.
1109 static int skip_annotation(const u1* buffer, int limit, int index) {
1110 assert(buffer != NULL, "invariant");
1111 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1112 // value := switch (tag:u1) { ... }
1113 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1114 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1115 while (--nmem >= 0 && index < limit) {
1116 SAFE_ADD(index, limit, 2); // skip member
1117 index = skip_annotation_value(buffer, limit, index);
1118 }
1119 return index;
1120 }
1121
1122 // Skip an annotation value. Return >=limit if there is any problem.
1123 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1124 assert(buffer != NULL, "invariant");
1125
1126 // value := switch (tag:u1) {
1127 // case B, C, I, S, Z, D, F, J, c: con:u2;
1128 // case e: e_class:u2 e_name:u2;
1129 // case s: s_con:u2;
1130 // case [: do(nval:u2) {value};
1131 // case @: annotation;
1132 // case s: s_con:u2;
1133 // }
1134 SAFE_ADD(index, limit, 1); // read tag
1135 const u1 tag = buffer[index - 1];
1136 switch (tag) {
1137 case 'B':
1138 case 'C':
1139 case 'I':
1140 case 'S':
1141 case 'Z':
1142 case 'D':
1143 case 'F':
1144 case 'J':
1145 case 'c':
1146 case 's':
1147 SAFE_ADD(index, limit, 2); // skip con or s_con
1148 break;
1149 case 'e':
1150 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1151 break;
1152 case '[':
1153 {
1154 SAFE_ADD(index, limit, 2); // read nval
1155 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1156 while (--nval >= 0 && index < limit) {
1157 index = skip_annotation_value(buffer, limit, index);
1158 }
1159 }
1160 break;
1161 case '@':
1162 index = skip_annotation(buffer, limit, index);
1163 break;
1164 default:
1165 return limit; // bad tag byte
1166 }
1167 return index;
1168 }
1169
1170 // Sift through annotations, looking for those significant to the VM:
1171 static void parse_annotations(const ConstantPool* const cp,
1172 const u1* buffer, int limit,
1173 AnnotationCollector* coll,
1174 ClassLoaderData* loader_data,
1175 const bool can_access_vm_annotations) {
1176
1177 assert(cp != NULL, "invariant");
1178 assert(buffer != NULL, "invariant");
1179 assert(coll != NULL, "invariant");
1180 assert(loader_data != NULL, "invariant");
1181
1182 // annotations := do(nann:u2) {annotation}
1183 int index = 2; // read nann
1184 if (index >= limit) return;
1185 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1186 enum { // initial annotation layout
1187 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1188 count_off = 2, // u2 such as 1 (one value)
1189 member_off = 4, // utf8 such as 'value'
1190 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1191 e_tag_val = 'e',
1192 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1193 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1194 e_size = 11, // end of 'e' annotation
1195 c_tag_val = 'c', // payload is type
1196 c_con_off = 7, // utf8 payload, such as 'I'
1197 c_size = 9, // end of 'c' annotation
1198 s_tag_val = 's', // payload is String
1199 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1200 s_size = 9,
1201 min_size = 6 // smallest possible size (zero members)
1202 };
1203 // Cannot add min_size to index in case of overflow MAX_INT
1204 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1205 int index0 = index;
1206 index = skip_annotation(buffer, limit, index);
1207 const u1* const abase = buffer + index0;
1208 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1209 const int count = Bytes::get_Java_u2((address)abase + count_off);
1210 const Symbol* const aname = check_symbol_at(cp, atype);
1211 if (aname == NULL) break; // invalid annotation name
1212 const Symbol* member = NULL;
1213 if (count >= 1) {
1214 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1215 member = check_symbol_at(cp, member_index);
1216 if (member == NULL) break; // invalid member name
1217 }
1218
1219 // Here is where parsing particular annotations will take place.
1220 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname, can_access_vm_annotations);
1221 if (AnnotationCollector::_unknown == id) continue;
1222 coll->set_annotation(id);
1223
1224 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1225 // @Contended can optionally specify the contention group.
1226 //
1227 // Contended group defines the equivalence class over the fields:
1228 // the fields within the same contended group are not treated distinct.
1229 // The only exception is default group, which does not incur the
1230 // equivalence. Naturally, contention group for classes is meaningless.
1231 //
1232 // While the contention group is specified as String, annotation
1233 // values are already interned, and we might as well use the constant
1234 // pool index as the group tag.
1235 //
1236 u2 group_index = 0; // default contended group
1237 if (count == 1
1238 && s_size == (index - index0) // match size
1239 && s_tag_val == *(abase + tag_off)
1240 && member == vmSymbols::value_name()) {
1241 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1242 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1243 group_index = 0; // default contended group
1244 }
1245 }
1246 coll->set_contended_group(group_index);
1247 }
1248 }
1249 }
1250
1251
1252 // Parse attributes for a field.
1253 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1254 u2 attributes_count,
1255 bool is_static, u2 signature_index,
1256 u2* const constantvalue_index_addr,
1257 bool* const is_synthetic_addr,
1258 u2* const generic_signature_index_addr,
1259 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1260 TRAPS) {
1261 assert(cfs != NULL, "invariant");
1262 assert(constantvalue_index_addr != NULL, "invariant");
1263 assert(is_synthetic_addr != NULL, "invariant");
1264 assert(generic_signature_index_addr != NULL, "invariant");
1265 assert(parsed_annotations != NULL, "invariant");
1266 assert(attributes_count > 0, "attributes_count should be greater than 0");
1267
1268 u2 constantvalue_index = 0;
1269 u2 generic_signature_index = 0;
1270 bool is_synthetic = false;
1271 const u1* runtime_visible_annotations = NULL;
1272 int runtime_visible_annotations_length = 0;
1273 const u1* runtime_invisible_annotations = NULL;
1274 int runtime_invisible_annotations_length = 0;
1275 const u1* runtime_visible_type_annotations = NULL;
1276 int runtime_visible_type_annotations_length = 0;
1277 const u1* runtime_invisible_type_annotations = NULL;
1278 int runtime_invisible_type_annotations_length = 0;
1279 bool runtime_invisible_annotations_exists = false;
1280 bool runtime_invisible_type_annotations_exists = false;
1281 const ConstantPool* const cp = _cp;
1282
1283 while (attributes_count--) {
1284 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1285 const u2 attribute_name_index = cfs->get_u2_fast();
1286 const u4 attribute_length = cfs->get_u4_fast();
1287 check_property(valid_symbol_at(attribute_name_index),
1288 "Invalid field attribute index %u in class file %s",
1289 attribute_name_index,
1290 CHECK);
1291
1292 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1293 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1294 // ignore if non-static
1295 if (constantvalue_index != 0) {
1296 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", THREAD);
1297 return;
1298 }
1299 check_property(
1300 attribute_length == 2,
1301 "Invalid ConstantValue field attribute length %u in class file %s",
1302 attribute_length, CHECK);
1303
1304 constantvalue_index = cfs->get_u2(CHECK);
1305 if (_need_verify) {
1306 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1307 }
1308 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1309 if (attribute_length != 0) {
1310 classfile_parse_error(
1311 "Invalid Synthetic field attribute length %u in class file %s",
1312 attribute_length, THREAD);
1313 return;
1314 }
1315 is_synthetic = true;
1316 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1317 if (attribute_length != 0) {
1318 classfile_parse_error(
1319 "Invalid Deprecated field attribute length %u in class file %s",
1320 attribute_length, THREAD);
1321 return;
1322 }
1323 } else if (_major_version >= JAVA_1_5_VERSION) {
1324 if (attribute_name == vmSymbols::tag_signature()) {
1325 if (generic_signature_index != 0) {
1326 classfile_parse_error(
1327 "Multiple Signature attributes for field in class file %s", THREAD);
1328 return;
1329 }
1330 if (attribute_length != 2) {
1331 classfile_parse_error(
1332 "Wrong size %u for field's Signature attribute in class file %s",
1333 attribute_length, THREAD);
1334 return;
1335 }
1336 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1337 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1338 if (runtime_visible_annotations != NULL) {
1339 classfile_parse_error(
1340 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", THREAD);
1341 return;
1342 }
1343 runtime_visible_annotations_length = attribute_length;
1344 runtime_visible_annotations = cfs->current();
1345 assert(runtime_visible_annotations != NULL, "null visible annotations");
1346 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1347 parse_annotations(cp,
1348 runtime_visible_annotations,
1349 runtime_visible_annotations_length,
1350 parsed_annotations,
1351 _loader_data,
1352 _can_access_vm_annotations);
1353 cfs->skip_u1_fast(runtime_visible_annotations_length);
1354 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1355 if (runtime_invisible_annotations_exists) {
1356 classfile_parse_error(
1357 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", THREAD);
1358 return;
1359 }
1360 runtime_invisible_annotations_exists = true;
1361 if (PreserveAllAnnotations) {
1362 runtime_invisible_annotations_length = attribute_length;
1363 runtime_invisible_annotations = cfs->current();
1364 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1365 }
1366 cfs->skip_u1(attribute_length, CHECK);
1367 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1368 if (runtime_visible_type_annotations != NULL) {
1369 classfile_parse_error(
1370 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", THREAD);
1371 return;
1372 }
1373 runtime_visible_type_annotations_length = attribute_length;
1374 runtime_visible_type_annotations = cfs->current();
1375 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1376 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1377 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1378 if (runtime_invisible_type_annotations_exists) {
1379 classfile_parse_error(
1380 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", THREAD);
1381 return;
1382 } else {
1383 runtime_invisible_type_annotations_exists = true;
1384 }
1385 if (PreserveAllAnnotations) {
1386 runtime_invisible_type_annotations_length = attribute_length;
1387 runtime_invisible_type_annotations = cfs->current();
1388 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1389 }
1390 cfs->skip_u1(attribute_length, CHECK);
1391 } else {
1392 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1393 }
1394 } else {
1395 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1396 }
1397 }
1398
1399 *constantvalue_index_addr = constantvalue_index;
1400 *is_synthetic_addr = is_synthetic;
1401 *generic_signature_index_addr = generic_signature_index;
1402 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1403 runtime_visible_annotations_length,
1404 runtime_invisible_annotations,
1405 runtime_invisible_annotations_length,
1406 CHECK);
1407 parsed_annotations->set_field_annotations(a);
1408 a = assemble_annotations(runtime_visible_type_annotations,
1409 runtime_visible_type_annotations_length,
1410 runtime_invisible_type_annotations,
1411 runtime_invisible_type_annotations_length,
1412 CHECK);
1413 parsed_annotations->set_field_type_annotations(a);
1414 return;
1415 }
1416
1417
1418 // Field allocation types. Used for computing field offsets.
1419
1420 enum FieldAllocationType {
1421 STATIC_OOP, // Oops
1422 STATIC_BYTE, // Boolean, Byte, char
1423 STATIC_SHORT, // shorts
1424 STATIC_WORD, // ints
1425 STATIC_DOUBLE, // aligned long or double
1426 STATIC_INLINE, // inline type field
1427 NONSTATIC_OOP,
1428 NONSTATIC_BYTE,
1429 NONSTATIC_SHORT,
1430 NONSTATIC_WORD,
1431 NONSTATIC_DOUBLE,
1432 NONSTATIC_INLINE,
1433 MAX_FIELD_ALLOCATION_TYPE,
1434 BAD_ALLOCATION_TYPE = -1
1435 };
1436
1437 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1438 BAD_ALLOCATION_TYPE, // 0
1439 BAD_ALLOCATION_TYPE, // 1
1440 BAD_ALLOCATION_TYPE, // 2
1441 BAD_ALLOCATION_TYPE, // 3
1442 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1443 NONSTATIC_SHORT, // T_CHAR = 5,
1444 NONSTATIC_WORD, // T_FLOAT = 6,
1445 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1446 NONSTATIC_BYTE, // T_BYTE = 8,
1447 NONSTATIC_SHORT, // T_SHORT = 9,
1448 NONSTATIC_WORD, // T_INT = 10,
1449 NONSTATIC_DOUBLE, // T_LONG = 11,
1450 NONSTATIC_OOP, // T_OBJECT = 12,
1451 NONSTATIC_OOP, // T_ARRAY = 13,
1452 NONSTATIC_OOP, // T_PRIMITIVE_OBJECT = 14,
1453 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1454 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1455 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1456 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1457 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1458 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20,
1459 BAD_ALLOCATION_TYPE, // 0
1460 BAD_ALLOCATION_TYPE, // 1
1461 BAD_ALLOCATION_TYPE, // 2
1462 BAD_ALLOCATION_TYPE, // 3
1463 STATIC_BYTE , // T_BOOLEAN = 4,
1464 STATIC_SHORT, // T_CHAR = 5,
1465 STATIC_WORD, // T_FLOAT = 6,
1466 STATIC_DOUBLE, // T_DOUBLE = 7,
1467 STATIC_BYTE, // T_BYTE = 8,
1468 STATIC_SHORT, // T_SHORT = 9,
1469 STATIC_WORD, // T_INT = 10,
1470 STATIC_DOUBLE, // T_LONG = 11,
1471 STATIC_OOP, // T_OBJECT = 12,
1472 STATIC_OOP, // T_ARRAY = 13,
1473 STATIC_OOP, // T_PRIMITIVE_OBJECT = 14,
1474 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1475 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1476 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1477 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1478 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1479 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20
1480 };
1481
1482 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type, bool is_inline_type) {
1483 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1484 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1485 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1486 if (is_inline_type) {
1487 result = is_static ? STATIC_INLINE : NONSTATIC_INLINE;
1488 }
1489 return result;
1490 }
1491
1492 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1493 public:
1494 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1495
1496 FieldAllocationCount() {
1497 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1498 count[i] = 0;
1499 }
1500 }
1501
1502 void update(bool is_static, BasicType type, bool is_inline_type) {
1503 FieldAllocationType atype = basic_type_to_atype(is_static, type, is_inline_type);
1504 if (atype != BAD_ALLOCATION_TYPE) {
1505 // Make sure there is no overflow with injected fields.
1506 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1507 count[atype]++;
1508 }
1509 }
1510 };
1511
1512 // Side-effects: populates the _fields, _fields_annotations,
1513 // _fields_type_annotations fields
1514 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1515 bool is_interface,
1516 bool is_inline_type,
1517 bool is_permits_value_class,
1518 FieldAllocationCount* const fac,
1519 ConstantPool* cp,
1520 const int cp_size,
1521 u2* const java_fields_count_ptr,
1522 TRAPS) {
1523
1524 assert(cfs != NULL, "invariant");
1525 assert(fac != NULL, "invariant");
1526 assert(cp != NULL, "invariant");
1527 assert(java_fields_count_ptr != NULL, "invariant");
1528
1529 assert(NULL == _fields, "invariant");
1530 assert(NULL == _fields_annotations, "invariant");
1531 assert(NULL == _fields_type_annotations, "invariant");
1532
1533 cfs->guarantee_more(2, CHECK); // length
1534 const u2 length = cfs->get_u2_fast();
1535 *java_fields_count_ptr = length;
1536
1537 int num_injected = 0;
1538 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1539 &num_injected);
1540
1541 // two more slots are required for inline classes:
1542 // one for the static field with a reference to the pre-allocated default value
1543 // one for the field the JVM injects when detecting an empty inline class
1544 const int total_fields = length + num_injected + (is_inline_type ? 2 : 0);
1545
1546 // The field array starts with tuples of shorts
1547 // [access, name index, sig index, initial value index, byte offset].
1548 // A generic signature slot only exists for field with generic
1549 // signature attribute. And the access flag is set with
1550 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1551 // signature slots are at the end of the field array and after all
1552 // other fields data.
1553 //
1554 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1555 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1556 // ...
1557 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1558 // [generic signature index]
1559 // [generic signature index]
1560 // ...
1561 //
1562 // Allocate a temporary resource array for field data. For each field,
1563 // a slot is reserved in the temporary array for the generic signature
1564 // index. After parsing all fields, the data are copied to a permanent
1565 // array and any unused slots will be discarded.
1566 ResourceMark rm(THREAD);
1567 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1568 u2,
1569 total_fields * (FieldInfo::field_slots + 1));
1570
1571 // The generic signature slots start after all other fields' data.
1572 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1573 int num_generic_signature = 0;
1574 int instance_fields_count = 0;
1575 for (int n = 0; n < length; n++) {
1576 // access_flags, name_index, descriptor_index, attributes_count
1577 cfs->guarantee_more(8, CHECK);
1578
1579 jint recognized_modifiers = JVM_RECOGNIZED_FIELD_MODIFIERS;
1580
1581 const jint flags = cfs->get_u2_fast() & recognized_modifiers;
1582 verify_legal_field_modifiers(flags, is_interface, is_inline_type, is_permits_value_class, CHECK);
1583 AccessFlags access_flags;
1584 access_flags.set_flags(flags);
1585
1586 const u2 name_index = cfs->get_u2_fast();
1587 check_property(valid_symbol_at(name_index),
1588 "Invalid constant pool index %u for field name in class file %s",
1589 name_index, CHECK);
1590 const Symbol* const name = cp->symbol_at(name_index);
1591 verify_legal_field_name(name, CHECK);
1592
1593 const u2 signature_index = cfs->get_u2_fast();
1594 check_property(valid_symbol_at(signature_index),
1595 "Invalid constant pool index %u for field signature in class file %s",
1596 signature_index, CHECK);
1597 const Symbol* const sig = cp->symbol_at(signature_index);
1598 verify_legal_field_signature(name, sig, CHECK);
1599 if (!access_flags.is_static()) instance_fields_count++;
1600
1601 u2 constantvalue_index = 0;
1602 bool is_synthetic = false;
1603 u2 generic_signature_index = 0;
1604 const bool is_static = access_flags.is_static();
1605 FieldAnnotationCollector parsed_annotations(_loader_data);
1606
1607 const u2 attributes_count = cfs->get_u2_fast();
1608 if (attributes_count > 0) {
1609 parse_field_attributes(cfs,
1610 attributes_count,
1611 is_static,
1612 signature_index,
1613 &constantvalue_index,
1614 &is_synthetic,
1615 &generic_signature_index,
1616 &parsed_annotations,
1617 CHECK);
1618
1619 if (parsed_annotations.field_annotations() != NULL) {
1620 if (_fields_annotations == NULL) {
1621 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1622 _loader_data, length, NULL,
1623 CHECK);
1624 }
1625 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1626 parsed_annotations.set_field_annotations(NULL);
1627 }
1628 if (parsed_annotations.field_type_annotations() != NULL) {
1629 if (_fields_type_annotations == NULL) {
1630 _fields_type_annotations =
1631 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1632 length,
1633 NULL,
1634 CHECK);
1635 }
1636 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1637 parsed_annotations.set_field_type_annotations(NULL);
1638 }
1639
1640 if (is_synthetic) {
1641 access_flags.set_is_synthetic();
1642 }
1643 if (generic_signature_index != 0) {
1644 access_flags.set_field_has_generic_signature();
1645 fa[generic_signature_slot] = generic_signature_index;
1646 generic_signature_slot ++;
1647 num_generic_signature ++;
1648 }
1649 }
1650
1651 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1652 field->initialize(access_flags.as_short(),
1653 name_index,
1654 signature_index,
1655 constantvalue_index);
1656 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1657
1658 // Update FieldAllocationCount for this kind of field
1659 fac->update(is_static, type, type == T_PRIMITIVE_OBJECT);
1660
1661 // After field is initialized with type, we can augment it with aux info
1662 if (parsed_annotations.has_any_annotations()) {
1663 parsed_annotations.apply_to(field);
1664 if (field->is_contended()) {
1665 _has_contended_fields = true;
1666 }
1667 }
1668 }
1669
1670 int index = length;
1671 if (num_injected != 0) {
1672 for (int n = 0; n < num_injected; n++) {
1673 // Check for duplicates
1674 if (injected[n].may_be_java) {
1675 const Symbol* const name = injected[n].name();
1676 const Symbol* const signature = injected[n].signature();
1677 bool duplicate = false;
1678 for (int i = 0; i < length; i++) {
1679 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1680 if (name == cp->symbol_at(f->name_index()) &&
1681 signature == cp->symbol_at(f->signature_index())) {
1682 // Symbol is desclared in Java so skip this one
1683 duplicate = true;
1684 break;
1685 }
1686 }
1687 if (duplicate) {
1688 // These will be removed from the field array at the end
1689 continue;
1690 }
1691 }
1692
1693 // Injected field
1694 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1695 field->initialize((u2)JVM_ACC_FIELD_INTERNAL,
1696 (u2)(injected[n].name_index),
1697 (u2)(injected[n].signature_index),
1698 0);
1699
1700 const BasicType type = Signature::basic_type(injected[n].signature());
1701
1702 // Update FieldAllocationCount for this kind of field
1703 fac->update(false, type, false);
1704 index++;
1705 }
1706 }
1707
1708 if (is_inline_type) {
1709 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1710 field->initialize(JVM_ACC_FIELD_INTERNAL | JVM_ACC_STATIC,
1711 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(default_value_name)),
1712 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(object_signature)),
1713 0);
1714 const BasicType type = Signature::basic_type(vmSymbols::object_signature());
1715 fac->update(true, type, false);
1716 index++;
1717 }
1718
1719 if (is_inline_type && instance_fields_count == 0) {
1720 _is_empty_inline_type = true;
1721 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1722 field->initialize(JVM_ACC_FIELD_INTERNAL,
1723 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(empty_marker_name)),
1724 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(byte_signature)),
1725 0);
1726 const BasicType type = Signature::basic_type(vmSymbols::byte_signature());
1727 fac->update(false, type, false);
1728 index++;
1729 }
1730
1731 if (instance_fields_count > 0) {
1732 _has_nonstatic_fields = true;
1733 }
1734
1735 assert(NULL == _fields, "invariant");
1736
1737 _fields =
1738 MetadataFactory::new_array<u2>(_loader_data,
1739 index * FieldInfo::field_slots + num_generic_signature,
1740 CHECK);
1741 // Sometimes injected fields already exist in the Java source so
1742 // the fields array could be too long. In that case the
1743 // fields array is trimed. Also unused slots that were reserved
1744 // for generic signature indexes are discarded.
1745 {
1746 int i = 0;
1747 for (; i < index * FieldInfo::field_slots; i++) {
1748 _fields->at_put(i, fa[i]);
1749 }
1750 for (int j = total_fields * FieldInfo::field_slots;
1751 j < generic_signature_slot; j++) {
1752 _fields->at_put(i++, fa[j]);
1753 }
1754 assert(_fields->length() == i, "");
1755 }
1756
1757 if (_need_verify && length > 1) {
1758 // Check duplicated fields
1759 ResourceMark rm(THREAD);
1760 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1761 THREAD, NameSigHash*, HASH_ROW_SIZE);
1762 initialize_hashtable(names_and_sigs);
1763 bool dup = false;
1764 const Symbol* name = NULL;
1765 const Symbol* sig = NULL;
1766 {
1767 debug_only(NoSafepointVerifier nsv;)
1768 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1769 name = fs.name();
1770 sig = fs.signature();
1771 // If no duplicates, add name/signature in hashtable names_and_sigs.
1772 if (!put_after_lookup(name, sig, names_and_sigs)) {
1773 dup = true;
1774 break;
1775 }
1776 }
1777 }
1778 if (dup) {
1779 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1780 name->as_C_string(), sig->as_klass_external_name(), THREAD);
1781 }
1782 }
1783 }
1784
1785
1786 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1787 u4 code_length,
1788 u4 exception_table_length,
1789 TRAPS) {
1790 assert(cfs != NULL, "invariant");
1791
1792 const unsafe_u2* const exception_table_start = cfs->current();
1793 assert(exception_table_start != NULL, "null exception table");
1794
1795 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1796 // end_pc,
1797 // handler_pc,
1798 // catch_type_index
1799
1800 // Will check legal target after parsing code array in verifier.
1801 if (_need_verify) {
1802 for (unsigned int i = 0; i < exception_table_length; i++) {
1803 const u2 start_pc = cfs->get_u2_fast();
1804 const u2 end_pc = cfs->get_u2_fast();
1805 const u2 handler_pc = cfs->get_u2_fast();
1806 const u2 catch_type_index = cfs->get_u2_fast();
1807 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1808 "Illegal exception table range in class file %s",
1809 CHECK_NULL);
1810 guarantee_property(handler_pc < code_length,
1811 "Illegal exception table handler in class file %s",
1812 CHECK_NULL);
1813 if (catch_type_index != 0) {
1814 guarantee_property(valid_klass_reference_at(catch_type_index),
1815 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1816 }
1817 }
1818 } else {
1819 cfs->skip_u2_fast(exception_table_length * 4);
1820 }
1821 return exception_table_start;
1822 }
1823
1824 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1825 u4 code_length,
1826 CompressedLineNumberWriteStream**const write_stream,
1827 TRAPS) {
1828
1829 const ClassFileStream* const cfs = _stream;
1830 unsigned int num_entries = cfs->get_u2(CHECK);
1831
1832 // Each entry is a u2 start_pc, and a u2 line_number
1833 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1834
1835 // Verify line number attribute and table length
1836 check_property(
1837 code_attribute_length == sizeof(u2) + length_in_bytes,
1838 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1839
1840 cfs->guarantee_more(length_in_bytes, CHECK);
1841
1842 if ((*write_stream) == NULL) {
1843 if (length_in_bytes > fixed_buffer_size) {
1844 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1845 } else {
1846 (*write_stream) = new CompressedLineNumberWriteStream(
1847 _linenumbertable_buffer, fixed_buffer_size);
1848 }
1849 }
1850
1851 while (num_entries-- > 0) {
1852 const u2 bci = cfs->get_u2_fast(); // start_pc
1853 const u2 line = cfs->get_u2_fast(); // line_number
1854 guarantee_property(bci < code_length,
1855 "Invalid pc in LineNumberTable in class file %s", CHECK);
1856 (*write_stream)->write_pair(bci, line);
1857 }
1858 }
1859
1860
1861 class LVT_Hash : public AllStatic {
1862 public:
1863
1864 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1865 /*
1866 * 3-tuple start_bci/length/slot has to be unique key,
1867 * so the following comparison seems to be redundant:
1868 * && elem->name_cp_index == entry->_elem->name_cp_index
1869 */
1870 return (e0.start_bci == e1.start_bci &&
1871 e0.length == e1.length &&
1872 e0.name_cp_index == e1.name_cp_index &&
1873 e0.slot == e1.slot);
1874 }
1875
1876 static unsigned int hash(LocalVariableTableElement const& e0) {
1877 unsigned int raw_hash = e0.start_bci;
1878
1879 raw_hash = e0.length + raw_hash * 37;
1880 raw_hash = e0.name_cp_index + raw_hash * 37;
1881 raw_hash = e0.slot + raw_hash * 37;
1882
1883 return raw_hash;
1884 }
1885 };
1886
1887
1888 // Class file LocalVariableTable elements.
1889 class Classfile_LVT_Element {
1890 public:
1891 u2 start_bci;
1892 u2 length;
1893 u2 name_cp_index;
1894 u2 descriptor_cp_index;
1895 u2 slot;
1896 };
1897
1898 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1899 LocalVariableTableElement* const lvt) {
1900 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1901 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1902 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1903 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1904 lvt->signature_cp_index = 0;
1905 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1906 }
1907
1908 // Function is used to parse both attributes:
1909 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1910 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1911 u4 code_length,
1912 u2 max_locals,
1913 u4 code_attribute_length,
1914 u2* const localvariable_table_length,
1915 bool isLVTT,
1916 TRAPS) {
1917 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1918 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1919 const unsigned int size =
1920 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1921
1922 const ConstantPool* const cp = _cp;
1923
1924 // Verify local variable table attribute has right length
1925 if (_need_verify) {
1926 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1927 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1928 }
1929
1930 const unsafe_u2* const localvariable_table_start = cfs->current();
1931 assert(localvariable_table_start != NULL, "null local variable table");
1932 if (!_need_verify) {
1933 cfs->skip_u2_fast(size);
1934 } else {
1935 cfs->guarantee_more(size * 2, CHECK_NULL);
1936 for(int i = 0; i < (*localvariable_table_length); i++) {
1937 const u2 start_pc = cfs->get_u2_fast();
1938 const u2 length = cfs->get_u2_fast();
1939 const u2 name_index = cfs->get_u2_fast();
1940 const u2 descriptor_index = cfs->get_u2_fast();
1941 const u2 index = cfs->get_u2_fast();
1942 // Assign to a u4 to avoid overflow
1943 const u4 end_pc = (u4)start_pc + (u4)length;
1944
1945 if (start_pc >= code_length) {
1946 classfile_parse_error(
1947 "Invalid start_pc %u in %s in class file %s",
1948 start_pc, tbl_name, THREAD);
1949 return NULL;
1950 }
1951 if (end_pc > code_length) {
1952 classfile_parse_error(
1953 "Invalid length %u in %s in class file %s",
1954 length, tbl_name, THREAD);
1955 return NULL;
1956 }
1957 const int cp_size = cp->length();
1958 guarantee_property(valid_symbol_at(name_index),
1959 "Name index %u in %s has bad constant type in class file %s",
1960 name_index, tbl_name, CHECK_NULL);
1961 guarantee_property(valid_symbol_at(descriptor_index),
1962 "Signature index %u in %s has bad constant type in class file %s",
1963 descriptor_index, tbl_name, CHECK_NULL);
1964
1965 const Symbol* const name = cp->symbol_at(name_index);
1966 const Symbol* const sig = cp->symbol_at(descriptor_index);
1967 verify_legal_field_name(name, CHECK_NULL);
1968 u2 extra_slot = 0;
1969 if (!isLVTT) {
1970 verify_legal_field_signature(name, sig, CHECK_NULL);
1971
1972 // 4894874: check special cases for double and long local variables
1973 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1974 sig == vmSymbols::type_signature(T_LONG)) {
1975 extra_slot = 1;
1976 }
1977 }
1978 guarantee_property((index + extra_slot) < max_locals,
1979 "Invalid index %u in %s in class file %s",
1980 index, tbl_name, CHECK_NULL);
1981 }
1982 }
1983 return localvariable_table_start;
1984 }
1985
1986 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1987 u4 code_attribute_length,
1988 bool need_verify,
1989 TRAPS) {
1990 assert(cfs != NULL, "invariant");
1991
1992 if (0 == code_attribute_length) {
1993 return NULL;
1994 }
1995
1996 const u1* const stackmap_table_start = cfs->current();
1997 assert(stackmap_table_start != NULL, "null stackmap table");
1998
1999 // check code_attribute_length first
2000 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2001
2002 if (!need_verify && !DumpSharedSpaces) {
2003 return NULL;
2004 }
2005 return stackmap_table_start;
2006 }
2007
2008 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2009 u2* const checked_exceptions_length,
2010 u4 method_attribute_length,
2011 TRAPS) {
2012 assert(cfs != NULL, "invariant");
2013 assert(checked_exceptions_length != NULL, "invariant");
2014
2015 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2016 *checked_exceptions_length = cfs->get_u2_fast();
2017 const unsigned int size =
2018 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2019 const unsafe_u2* const checked_exceptions_start = cfs->current();
2020 assert(checked_exceptions_start != NULL, "null checked exceptions");
2021 if (!_need_verify) {
2022 cfs->skip_u2_fast(size);
2023 } else {
2024 // Verify each value in the checked exception table
2025 u2 checked_exception;
2026 const u2 len = *checked_exceptions_length;
2027 cfs->guarantee_more(2 * len, CHECK_NULL);
2028 for (int i = 0; i < len; i++) {
2029 checked_exception = cfs->get_u2_fast();
2030 check_property(
2031 valid_klass_reference_at(checked_exception),
2032 "Exception name has bad type at constant pool %u in class file %s",
2033 checked_exception, CHECK_NULL);
2034 }
2035 }
2036 // check exceptions attribute length
2037 if (_need_verify) {
2038 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2039 sizeof(u2) * size),
2040 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2041 }
2042 return checked_exceptions_start;
2043 }
2044
2045 void ClassFileParser::throwIllegalSignature(const char* type,
2046 const Symbol* name,
2047 const Symbol* sig,
2048 TRAPS) const {
2049 assert(name != NULL, "invariant");
2050 assert(sig != NULL, "invariant");
2051
2052 const char* class_note = "";
2053 if (is_inline_type() && name == vmSymbols::object_initializer_name()) {
2054 class_note = " (an inline class)";
2055 }
2056
2057 ResourceMark rm(THREAD);
2058 Exceptions::fthrow(THREAD_AND_LOCATION,
2059 vmSymbols::java_lang_ClassFormatError(),
2060 "%s \"%s\" in class %s%s has illegal signature \"%s\"", type,
2061 name->as_C_string(), _class_name->as_C_string(), class_note, sig->as_C_string());
2062 }
2063
2064 AnnotationCollector::ID
2065 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2066 const Symbol* name,
2067 const bool can_access_vm_annotations) {
2068 const vmSymbolID sid = vmSymbols::find_sid(name);
2069 // Privileged code can use all annotations. Other code silently drops some.
2070 const bool privileged = loader_data->is_boot_class_loader_data() ||
2071 loader_data->is_platform_class_loader_data() ||
2072 can_access_vm_annotations;
2073 switch (sid) {
2074 case VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2075 if (_location != _in_method) break; // only allow for methods
2076 if (!privileged) break; // only allow in privileged code
2077 return _method_CallerSensitive;
2078 }
2079 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2080 if (_location != _in_method) break; // only allow for methods
2081 if (!privileged) break; // only allow in privileged code
2082 return _method_ForceInline;
2083 }
2084 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2085 if (_location != _in_method) break; // only allow for methods
2086 if (!privileged) break; // only allow in privileged code
2087 return _method_DontInline;
2088 }
2089 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2090 if (_location != _in_method) break; // only allow for methods
2091 if (!privileged) break; // only allow in privileged code
2092 return _method_InjectedProfile;
2093 }
2094 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2095 if (_location != _in_method) break; // only allow for methods
2096 if (!privileged) break; // only allow in privileged code
2097 return _method_LambdaForm_Compiled;
2098 }
2099 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2100 if (_location != _in_method) break; // only allow for methods
2101 if (!privileged) break; // only allow in privileged code
2102 return _method_Hidden;
2103 }
2104 case VM_SYMBOL_ENUM_NAME(jdk_internal_misc_Scoped_signature): {
2105 if (_location != _in_method) break; // only allow for methods
2106 if (!privileged) break; // only allow in privileged code
2107 return _method_Scoped;
2108 }
2109 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_IntrinsicCandidate_signature): {
2110 if (_location != _in_method) break; // only allow for methods
2111 if (!privileged) break; // only allow in privileged code
2112 return _method_IntrinsicCandidate;
2113 }
2114 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2115 if (_location != _in_field) break; // only allow for fields
2116 if (!privileged) break; // only allow in privileged code
2117 return _field_Stable;
2118 }
2119 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2120 if (_location != _in_field && _location != _in_class) {
2121 break; // only allow for fields and classes
2122 }
2123 if (!EnableContended || (RestrictContended && !privileged)) {
2124 break; // honor privileges
2125 }
2126 return _jdk_internal_vm_annotation_Contended;
2127 }
2128 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2129 if (_location != _in_method) break; // only allow for methods
2130 if (RestrictReservedStack && !privileged) break; // honor privileges
2131 return _jdk_internal_vm_annotation_ReservedStackAccess;
2132 }
2133 case VM_SYMBOL_ENUM_NAME(jdk_internal_ValueBased_signature): {
2134 if (_location != _in_class) break; // only allow for classes
2135 if (!privileged) break; // only allow in priviledged code
2136 return _jdk_internal_ValueBased;
2137 }
2138 default: {
2139 break;
2140 }
2141 }
2142 return AnnotationCollector::_unknown;
2143 }
2144
2145 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2146 if (is_contended())
2147 f->set_contended_group(contended_group());
2148 if (is_stable())
2149 f->set_stable(true);
2150 }
2151
2152 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2153 // If there's an error deallocate metadata for field annotations
2154 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2155 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2156 }
2157
2158 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2159 if (has_annotation(_method_CallerSensitive))
2160 m->set_caller_sensitive(true);
2161 if (has_annotation(_method_ForceInline))
2162 m->set_force_inline(true);
2163 if (has_annotation(_method_DontInline))
2164 m->set_dont_inline(true);
2165 if (has_annotation(_method_InjectedProfile))
2166 m->set_has_injected_profile(true);
2167 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2168 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2169 if (has_annotation(_method_Hidden))
2170 m->set_hidden(true);
2171 if (has_annotation(_method_Scoped))
2172 m->set_scoped(true);
2173 if (has_annotation(_method_IntrinsicCandidate) && !m->is_synthetic())
2174 m->set_intrinsic_candidate(true);
2175 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2176 m->set_has_reserved_stack_access(true);
2177 }
2178
2179 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2180 assert(ik != NULL, "invariant");
2181 if (has_annotation(_jdk_internal_vm_annotation_Contended)) {
2182 ik->set_is_contended(is_contended());
2183 }
2184 if (has_annotation(_jdk_internal_ValueBased)) {
2185 ik->set_has_value_based_class_annotation();
2186 if (DiagnoseSyncOnValueBasedClasses) {
2187 ik->set_is_value_based();
2188 }
2189 }
2190 }
2191
2192 #define MAX_ARGS_SIZE 255
2193 #define MAX_CODE_SIZE 65535
2194 #define INITIAL_MAX_LVT_NUMBER 256
2195
2196 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2197 *
2198 * Rules for LVT's and LVTT's are:
2199 * - There can be any number of LVT's and LVTT's.
2200 * - If there are n LVT's, it is the same as if there was just
2201 * one LVT containing all the entries from the n LVT's.
2202 * - There may be no more than one LVT entry per local variable.
2203 * Two LVT entries are 'equal' if these fields are the same:
2204 * start_pc, length, name, slot
2205 * - There may be no more than one LVTT entry per each LVT entry.
2206 * Each LVTT entry has to match some LVT entry.
2207 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2208 */
2209 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2210 int lvt_cnt,
2211 u2* const localvariable_table_length,
2212 const unsafe_u2** const localvariable_table_start,
2213 int lvtt_cnt,
2214 u2* const localvariable_type_table_length,
2215 const unsafe_u2** const localvariable_type_table_start,
2216 TRAPS) {
2217
2218 ResourceMark rm(THREAD);
2219
2220 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2221 256, ResourceObj::RESOURCE_AREA, mtInternal,
2222 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2223
2224 LVT_HashTable* const table = new LVT_HashTable();
2225
2226 // To fill LocalVariableTable in
2227 const Classfile_LVT_Element* cf_lvt;
2228 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2229
2230 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2231 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2232 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2233 copy_lvt_element(&cf_lvt[idx], lvt);
2234 // If no duplicates, add LVT elem in hashtable.
2235 if (table->put(*lvt, lvt) == false
2236 && _need_verify
2237 && _major_version >= JAVA_1_5_VERSION) {
2238 classfile_parse_error("Duplicated LocalVariableTable attribute "
2239 "entry for '%s' in class file %s",
2240 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2241 THREAD);
2242 return;
2243 }
2244 }
2245 }
2246
2247 // To merge LocalVariableTable and LocalVariableTypeTable
2248 const Classfile_LVT_Element* cf_lvtt;
2249 LocalVariableTableElement lvtt_elem;
2250
2251 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2252 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2253 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2254 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2255 LocalVariableTableElement** entry = table->get(lvtt_elem);
2256 if (entry == NULL) {
2257 if (_need_verify) {
2258 classfile_parse_error("LVTT entry for '%s' in class file %s "
2259 "does not match any LVT entry",
2260 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2261 THREAD);
2262 return;
2263 }
2264 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2265 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2266 "entry for '%s' in class file %s",
2267 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2268 THREAD);
2269 return;
2270 } else {
2271 // to add generic signatures into LocalVariableTable
2272 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2273 }
2274 }
2275 }
2276 }
2277
2278
2279 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2280 const u1* runtime_visible_annotations,
2281 int runtime_visible_annotations_length,
2282 const u1* runtime_invisible_annotations,
2283 int runtime_invisible_annotations_length,
2284 const u1* runtime_visible_parameter_annotations,
2285 int runtime_visible_parameter_annotations_length,
2286 const u1* runtime_invisible_parameter_annotations,
2287 int runtime_invisible_parameter_annotations_length,
2288 const u1* runtime_visible_type_annotations,
2289 int runtime_visible_type_annotations_length,
2290 const u1* runtime_invisible_type_annotations,
2291 int runtime_invisible_type_annotations_length,
2292 const u1* annotation_default,
2293 int annotation_default_length,
2294 TRAPS) {
2295
2296 AnnotationArray* a;
2297
2298 if (runtime_visible_annotations_length +
2299 runtime_invisible_annotations_length > 0) {
2300 a = assemble_annotations(runtime_visible_annotations,
2301 runtime_visible_annotations_length,
2302 runtime_invisible_annotations,
2303 runtime_invisible_annotations_length,
2304 CHECK);
2305 cm->set_method_annotations(a);
2306 }
2307
2308 if (runtime_visible_parameter_annotations_length +
2309 runtime_invisible_parameter_annotations_length > 0) {
2310 a = assemble_annotations(runtime_visible_parameter_annotations,
2311 runtime_visible_parameter_annotations_length,
2312 runtime_invisible_parameter_annotations,
2313 runtime_invisible_parameter_annotations_length,
2314 CHECK);
2315 cm->set_parameter_annotations(a);
2316 }
2317
2318 if (annotation_default_length > 0) {
2319 a = assemble_annotations(annotation_default,
2320 annotation_default_length,
2321 NULL,
2322 0,
2323 CHECK);
2324 cm->set_default_annotations(a);
2325 }
2326
2327 if (runtime_visible_type_annotations_length +
2328 runtime_invisible_type_annotations_length > 0) {
2329 a = assemble_annotations(runtime_visible_type_annotations,
2330 runtime_visible_type_annotations_length,
2331 runtime_invisible_type_annotations,
2332 runtime_invisible_type_annotations_length,
2333 CHECK);
2334 cm->set_type_annotations(a);
2335 }
2336 }
2337
2338
2339 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2340 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2341 // Method* to save footprint, so we only know the size of the resulting Method* when the
2342 // entire method attribute is parsed.
2343 //
2344 // The promoted_flags parameter is used to pass relevant access_flags
2345 // from the method back up to the containing klass. These flag values
2346 // are added to klass's access_flags.
2347
2348 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2349 bool is_interface,
2350 bool is_inline_type,
2351 bool is_abstract_type,
2352 const ConstantPool* cp,
2353 AccessFlags* const promoted_flags,
2354 TRAPS) {
2355 assert(cfs != NULL, "invariant");
2356 assert(cp != NULL, "invariant");
2357 assert(promoted_flags != NULL, "invariant");
2358
2359 ResourceMark rm(THREAD);
2360 // Parse fixed parts:
2361 // access_flags, name_index, descriptor_index, attributes_count
2362 cfs->guarantee_more(8, CHECK_NULL);
2363
2364 int flags = cfs->get_u2_fast();
2365 const u2 name_index = cfs->get_u2_fast();
2366 const int cp_size = cp->length();
2367 check_property(
2368 valid_symbol_at(name_index),
2369 "Illegal constant pool index %u for method name in class file %s",
2370 name_index, CHECK_NULL);
2371 const Symbol* const name = cp->symbol_at(name_index);
2372 verify_legal_method_name(name, CHECK_NULL);
2373
2374 const u2 signature_index = cfs->get_u2_fast();
2375 guarantee_property(
2376 valid_symbol_at(signature_index),
2377 "Illegal constant pool index %u for method signature in class file %s",
2378 signature_index, CHECK_NULL);
2379 const Symbol* const signature = cp->symbol_at(signature_index);
2380
2381 if (name == vmSymbols::class_initializer_name()) {
2382 // We ignore the other access flags for a valid class initializer.
2383 // (JVM Spec 2nd ed., chapter 4.6)
2384 if (_major_version < 51) { // backward compatibility
2385 flags = JVM_ACC_STATIC;
2386 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2387 flags &= JVM_ACC_STATIC | (_major_version <= JAVA_16_VERSION ? JVM_ACC_STRICT : 0);
2388 } else {
2389 classfile_parse_error("Method <clinit> is not static in class file %s", THREAD);
2390 return NULL;
2391 }
2392 } else {
2393 verify_legal_method_modifiers(flags, is_interface, is_inline_type, is_abstract_type, name, CHECK_NULL);
2394 }
2395
2396 if (name == vmSymbols::object_initializer_name()) {
2397 if (is_interface) {
2398 classfile_parse_error("Interface cannot have a method named <init>, class file %s", THREAD);
2399 return NULL;
2400 } else if ((!is_inline_type || is_abstract_type) && signature->is_void_method_signature()) {
2401 // OK, a constructor
2402 } else if (is_inline_type && !signature->is_void_method_signature()) {
2403 // also OK, a static factory, as long as the return value is good
2404 bool ok = false;
2405 SignatureStream ss((Symbol*) signature, true);
2406 while (!ss.at_return_type()) ss.next();
2407 if (ss.is_reference()) {
2408 Symbol* ret = ss.as_symbol();
2409 const Symbol* required = class_name();
2410 if (is_hidden()) {
2411 // The original class name in hidden classes gets changed. So using
2412 // the original name in the return type is no longer valid.
2413 // Note that expecting the return type for inline hidden class factory
2414 // methods to be java.lang.Object works around a JVM Spec issue for
2415 // hidden classes.
2416 required = vmSymbols::java_lang_Object();
2417 }
2418 ok = (ret == required);
2419 }
2420 if (!ok) {
2421 throwIllegalSignature("Method", name, signature, CHECK_0);
2422 }
2423 } else {
2424 // not OK, so throw the same error as in verify_legal_method_signature.
2425 throwIllegalSignature("Method", name, signature, CHECK_0);
2426 }
2427 // A declared <init> method must always be either a non-static
2428 // object constructor, with a void return, or else it must be a
2429 // static factory method, with a non-void return. No other
2430 // definition of <init> is possible.
2431 //
2432 // The verifier (in verify_invoke_instructions) will inspect the
2433 // signature of any attempt to invoke <init>, and ensures that it
2434 // returns non-void if and only if it is being invoked by
2435 // invokestatic, and void if and only if it is being invoked by
2436 // invokespecial.
2437 //
2438 // When a symbolic reference to <init> is resolved for a
2439 // particular invocation mode (special or static), the mode is
2440 // matched to the JVM_ACC_STATIC modifier of the <init> method.
2441 // Thus, it is impossible to statically invoke a constructor, and
2442 // impossible to "new + invokespecial" a static factory, either
2443 // through bytecode or through reflection.
2444 }
2445
2446 int args_size = -1; // only used when _need_verify is true
2447 if (_need_verify) {
2448 verify_legal_name_with_signature(name, signature, CHECK_NULL);
2449 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2450 verify_legal_method_signature(name, signature, CHECK_NULL);
2451 if (args_size > MAX_ARGS_SIZE) {
2452 classfile_parse_error("Too many arguments in method signature in class file %s", THREAD);
2453 return NULL;
2454 }
2455 }
2456
2457 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2458
2459 // Default values for code and exceptions attribute elements
2460 u2 max_stack = 0;
2461 u2 max_locals = 0;
2462 u4 code_length = 0;
2463 const u1* code_start = 0;
2464 u2 exception_table_length = 0;
2465 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2466 Array<int>* exception_handlers = Universe::the_empty_int_array();
2467 u2 checked_exceptions_length = 0;
2468 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2469 CompressedLineNumberWriteStream* linenumber_table = NULL;
2470 int linenumber_table_length = 0;
2471 int total_lvt_length = 0;
2472 u2 lvt_cnt = 0;
2473 u2 lvtt_cnt = 0;
2474 bool lvt_allocated = false;
2475 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2476 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2477 u2* localvariable_table_length = NULL;
2478 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2479 u2* localvariable_type_table_length = NULL;
2480 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2481 int method_parameters_length = -1;
2482 const u1* method_parameters_data = NULL;
2483 bool method_parameters_seen = false;
2484 bool parsed_code_attribute = false;
2485 bool parsed_checked_exceptions_attribute = false;
2486 bool parsed_stackmap_attribute = false;
2487 // stackmap attribute - JDK1.5
2488 const u1* stackmap_data = NULL;
2489 int stackmap_data_length = 0;
2490 u2 generic_signature_index = 0;
2491 MethodAnnotationCollector parsed_annotations;
2492 const u1* runtime_visible_annotations = NULL;
2493 int runtime_visible_annotations_length = 0;
2494 const u1* runtime_invisible_annotations = NULL;
2495 int runtime_invisible_annotations_length = 0;
2496 const u1* runtime_visible_parameter_annotations = NULL;
2497 int runtime_visible_parameter_annotations_length = 0;
2498 const u1* runtime_invisible_parameter_annotations = NULL;
2499 int runtime_invisible_parameter_annotations_length = 0;
2500 const u1* runtime_visible_type_annotations = NULL;
2501 int runtime_visible_type_annotations_length = 0;
2502 const u1* runtime_invisible_type_annotations = NULL;
2503 int runtime_invisible_type_annotations_length = 0;
2504 bool runtime_invisible_annotations_exists = false;
2505 bool runtime_invisible_type_annotations_exists = false;
2506 bool runtime_invisible_parameter_annotations_exists = false;
2507 const u1* annotation_default = NULL;
2508 int annotation_default_length = 0;
2509
2510 // Parse code and exceptions attribute
2511 u2 method_attributes_count = cfs->get_u2_fast();
2512 while (method_attributes_count--) {
2513 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2514 const u2 method_attribute_name_index = cfs->get_u2_fast();
2515 const u4 method_attribute_length = cfs->get_u4_fast();
2516 check_property(
2517 valid_symbol_at(method_attribute_name_index),
2518 "Invalid method attribute name index %u in class file %s",
2519 method_attribute_name_index, CHECK_NULL);
2520
2521 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2522 if (method_attribute_name == vmSymbols::tag_code()) {
2523 // Parse Code attribute
2524 if (_need_verify) {
2525 guarantee_property(
2526 !access_flags.is_native() && !access_flags.is_abstract(),
2527 "Code attribute in native or abstract methods in class file %s",
2528 CHECK_NULL);
2529 }
2530 if (parsed_code_attribute) {
2531 classfile_parse_error("Multiple Code attributes in class file %s",
2532 THREAD);
2533 return NULL;
2534 }
2535 parsed_code_attribute = true;
2536
2537 // Stack size, locals size, and code size
2538 cfs->guarantee_more(8, CHECK_NULL);
2539 max_stack = cfs->get_u2_fast();
2540 max_locals = cfs->get_u2_fast();
2541 code_length = cfs->get_u4_fast();
2542 if (_need_verify) {
2543 guarantee_property(args_size <= max_locals,
2544 "Arguments can't fit into locals in class file %s",
2545 CHECK_NULL);
2546 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2547 "Invalid method Code length %u in class file %s",
2548 code_length, CHECK_NULL);
2549 }
2550 // Code pointer
2551 code_start = cfs->current();
2552 assert(code_start != NULL, "null code start");
2553 cfs->guarantee_more(code_length, CHECK_NULL);
2554 cfs->skip_u1_fast(code_length);
2555
2556 // Exception handler table
2557 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2558 exception_table_length = cfs->get_u2_fast();
2559 if (exception_table_length > 0) {
2560 exception_table_start = parse_exception_table(cfs,
2561 code_length,
2562 exception_table_length,
2563 CHECK_NULL);
2564 }
2565
2566 // Parse additional attributes in code attribute
2567 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2568 u2 code_attributes_count = cfs->get_u2_fast();
2569
2570 unsigned int calculated_attribute_length = 0;
2571
2572 calculated_attribute_length =
2573 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2574 calculated_attribute_length +=
2575 code_length +
2576 sizeof(exception_table_length) +
2577 sizeof(code_attributes_count) +
2578 exception_table_length *
2579 ( sizeof(u2) + // start_pc
2580 sizeof(u2) + // end_pc
2581 sizeof(u2) + // handler_pc
2582 sizeof(u2) ); // catch_type_index
2583
2584 while (code_attributes_count--) {
2585 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2586 const u2 code_attribute_name_index = cfs->get_u2_fast();
2587 const u4 code_attribute_length = cfs->get_u4_fast();
2588 calculated_attribute_length += code_attribute_length +
2589 sizeof(code_attribute_name_index) +
2590 sizeof(code_attribute_length);
2591 check_property(valid_symbol_at(code_attribute_name_index),
2592 "Invalid code attribute name index %u in class file %s",
2593 code_attribute_name_index,
2594 CHECK_NULL);
2595 if (LoadLineNumberTables &&
2596 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2597 // Parse and compress line number table
2598 parse_linenumber_table(code_attribute_length,
2599 code_length,
2600 &linenumber_table,
2601 CHECK_NULL);
2602
2603 } else if (LoadLocalVariableTables &&
2604 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2605 // Parse local variable table
2606 if (!lvt_allocated) {
2607 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2608 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2609 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2610 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2611 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2612 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2613 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2614 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2615 lvt_allocated = true;
2616 }
2617 if (lvt_cnt == max_lvt_cnt) {
2618 max_lvt_cnt <<= 1;
2619 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2620 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2621 }
2622 localvariable_table_start[lvt_cnt] =
2623 parse_localvariable_table(cfs,
2624 code_length,
2625 max_locals,
2626 code_attribute_length,
2627 &localvariable_table_length[lvt_cnt],
2628 false, // is not LVTT
2629 CHECK_NULL);
2630 total_lvt_length += localvariable_table_length[lvt_cnt];
2631 lvt_cnt++;
2632 } else if (LoadLocalVariableTypeTables &&
2633 _major_version >= JAVA_1_5_VERSION &&
2634 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2635 if (!lvt_allocated) {
2636 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2637 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2638 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2639 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2640 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2641 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2642 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2643 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2644 lvt_allocated = true;
2645 }
2646 // Parse local variable type table
2647 if (lvtt_cnt == max_lvtt_cnt) {
2648 max_lvtt_cnt <<= 1;
2649 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2650 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2651 }
2652 localvariable_type_table_start[lvtt_cnt] =
2653 parse_localvariable_table(cfs,
2654 code_length,
2655 max_locals,
2656 code_attribute_length,
2657 &localvariable_type_table_length[lvtt_cnt],
2658 true, // is LVTT
2659 CHECK_NULL);
2660 lvtt_cnt++;
2661 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2662 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2663 // Stack map is only needed by the new verifier in JDK1.5.
2664 if (parsed_stackmap_attribute) {
2665 classfile_parse_error("Multiple StackMapTable attributes in class file %s", THREAD);
2666 return NULL;
2667 }
2668 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2669 stackmap_data_length = code_attribute_length;
2670 parsed_stackmap_attribute = true;
2671 } else {
2672 // Skip unknown attributes
2673 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2674 }
2675 }
2676 // check method attribute length
2677 if (_need_verify) {
2678 guarantee_property(method_attribute_length == calculated_attribute_length,
2679 "Code segment has wrong length in class file %s",
2680 CHECK_NULL);
2681 }
2682 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2683 // Parse Exceptions attribute
2684 if (parsed_checked_exceptions_attribute) {
2685 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2686 THREAD);
2687 return NULL;
2688 }
2689 parsed_checked_exceptions_attribute = true;
2690 checked_exceptions_start =
2691 parse_checked_exceptions(cfs,
2692 &checked_exceptions_length,
2693 method_attribute_length,
2694 CHECK_NULL);
2695 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2696 // reject multiple method parameters
2697 if (method_parameters_seen) {
2698 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2699 THREAD);
2700 return NULL;
2701 }
2702 method_parameters_seen = true;
2703 method_parameters_length = cfs->get_u1_fast();
2704 const u2 real_length = (method_parameters_length * 4u) + 1u;
2705 if (method_attribute_length != real_length) {
2706 classfile_parse_error(
2707 "Invalid MethodParameters method attribute length %u in class file",
2708 method_attribute_length, THREAD);
2709 return NULL;
2710 }
2711 method_parameters_data = cfs->current();
2712 cfs->skip_u2_fast(method_parameters_length);
2713 cfs->skip_u2_fast(method_parameters_length);
2714 // ignore this attribute if it cannot be reflected
2715 if (!vmClasses::Parameter_klass_loaded())
2716 method_parameters_length = -1;
2717 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2718 if (method_attribute_length != 0) {
2719 classfile_parse_error(
2720 "Invalid Synthetic method attribute length %u in class file %s",
2721 method_attribute_length, THREAD);
2722 return NULL;
2723 }
2724 // Should we check that there hasn't already been a synthetic attribute?
2725 access_flags.set_is_synthetic();
2726 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2727 if (method_attribute_length != 0) {
2728 classfile_parse_error(
2729 "Invalid Deprecated method attribute length %u in class file %s",
2730 method_attribute_length, THREAD);
2731 return NULL;
2732 }
2733 } else if (_major_version >= JAVA_1_5_VERSION) {
2734 if (method_attribute_name == vmSymbols::tag_signature()) {
2735 if (generic_signature_index != 0) {
2736 classfile_parse_error(
2737 "Multiple Signature attributes for method in class file %s",
2738 THREAD);
2739 return NULL;
2740 }
2741 if (method_attribute_length != 2) {
2742 classfile_parse_error(
2743 "Invalid Signature attribute length %u in class file %s",
2744 method_attribute_length, THREAD);
2745 return NULL;
2746 }
2747 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2748 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2749 if (runtime_visible_annotations != NULL) {
2750 classfile_parse_error(
2751 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2752 THREAD);
2753 return NULL;
2754 }
2755 runtime_visible_annotations_length = method_attribute_length;
2756 runtime_visible_annotations = cfs->current();
2757 assert(runtime_visible_annotations != NULL, "null visible annotations");
2758 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2759 parse_annotations(cp,
2760 runtime_visible_annotations,
2761 runtime_visible_annotations_length,
2762 &parsed_annotations,
2763 _loader_data,
2764 _can_access_vm_annotations);
2765 cfs->skip_u1_fast(runtime_visible_annotations_length);
2766 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2767 if (runtime_invisible_annotations_exists) {
2768 classfile_parse_error(
2769 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2770 THREAD);
2771 return NULL;
2772 }
2773 runtime_invisible_annotations_exists = true;
2774 if (PreserveAllAnnotations) {
2775 runtime_invisible_annotations_length = method_attribute_length;
2776 runtime_invisible_annotations = cfs->current();
2777 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2778 }
2779 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2780 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2781 if (runtime_visible_parameter_annotations != NULL) {
2782 classfile_parse_error(
2783 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2784 THREAD);
2785 return NULL;
2786 }
2787 runtime_visible_parameter_annotations_length = method_attribute_length;
2788 runtime_visible_parameter_annotations = cfs->current();
2789 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2790 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2791 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2792 if (runtime_invisible_parameter_annotations_exists) {
2793 classfile_parse_error(
2794 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2795 THREAD);
2796 return NULL;
2797 }
2798 runtime_invisible_parameter_annotations_exists = true;
2799 if (PreserveAllAnnotations) {
2800 runtime_invisible_parameter_annotations_length = method_attribute_length;
2801 runtime_invisible_parameter_annotations = cfs->current();
2802 assert(runtime_invisible_parameter_annotations != NULL,
2803 "null invisible parameter annotations");
2804 }
2805 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2806 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2807 if (annotation_default != NULL) {
2808 classfile_parse_error(
2809 "Multiple AnnotationDefault attributes for method in class file %s",
2810 THREAD);
2811 return NULL;
2812 }
2813 annotation_default_length = method_attribute_length;
2814 annotation_default = cfs->current();
2815 assert(annotation_default != NULL, "null annotation default");
2816 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2817 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2818 if (runtime_visible_type_annotations != NULL) {
2819 classfile_parse_error(
2820 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2821 THREAD);
2822 return NULL;
2823 }
2824 runtime_visible_type_annotations_length = method_attribute_length;
2825 runtime_visible_type_annotations = cfs->current();
2826 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2827 // No need for the VM to parse Type annotations
2828 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2829 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2830 if (runtime_invisible_type_annotations_exists) {
2831 classfile_parse_error(
2832 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2833 THREAD);
2834 return NULL;
2835 } else {
2836 runtime_invisible_type_annotations_exists = true;
2837 }
2838 if (PreserveAllAnnotations) {
2839 runtime_invisible_type_annotations_length = method_attribute_length;
2840 runtime_invisible_type_annotations = cfs->current();
2841 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2842 }
2843 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2844 } else {
2845 // Skip unknown attributes
2846 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2847 }
2848 } else {
2849 // Skip unknown attributes
2850 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2851 }
2852 }
2853
2854 if (linenumber_table != NULL) {
2855 linenumber_table->write_terminator();
2856 linenumber_table_length = linenumber_table->position();
2857 }
2858
2859 // Make sure there's at least one Code attribute in non-native/non-abstract method
2860 if (_need_verify) {
2861 guarantee_property(access_flags.is_native() ||
2862 access_flags.is_abstract() ||
2863 parsed_code_attribute,
2864 "Absent Code attribute in method that is not native or abstract in class file %s",
2865 CHECK_NULL);
2866 }
2867
2868 // All sizing information for a Method* is finally available, now create it
2869 InlineTableSizes sizes(
2870 total_lvt_length,
2871 linenumber_table_length,
2872 exception_table_length,
2873 checked_exceptions_length,
2874 method_parameters_length,
2875 generic_signature_index,
2876 runtime_visible_annotations_length +
2877 runtime_invisible_annotations_length,
2878 runtime_visible_parameter_annotations_length +
2879 runtime_invisible_parameter_annotations_length,
2880 runtime_visible_type_annotations_length +
2881 runtime_invisible_type_annotations_length,
2882 annotation_default_length,
2883 0);
2884
2885 Method* const m = Method::allocate(_loader_data,
2886 code_length,
2887 access_flags,
2888 &sizes,
2889 ConstMethod::NORMAL,
2890 _cp->symbol_at(name_index),
2891 CHECK_NULL);
2892
2893 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2894
2895 // Fill in information from fixed part (access_flags already set)
2896 m->set_constants(_cp);
2897 m->set_name_index(name_index);
2898 m->set_signature_index(signature_index);
2899 m->compute_from_signature(cp->symbol_at(signature_index));
2900 assert(args_size < 0 || args_size == m->size_of_parameters(), "");
2901
2902 // Fill in code attribute information
2903 m->set_max_stack(max_stack);
2904 m->set_max_locals(max_locals);
2905 if (stackmap_data != NULL) {
2906 m->constMethod()->copy_stackmap_data(_loader_data,
2907 (u1*)stackmap_data,
2908 stackmap_data_length,
2909 CHECK_NULL);
2910 }
2911
2912 // Copy byte codes
2913 m->set_code((u1*)code_start);
2914
2915 // Copy line number table
2916 if (linenumber_table != NULL) {
2917 memcpy(m->compressed_linenumber_table(),
2918 linenumber_table->buffer(),
2919 linenumber_table_length);
2920 }
2921
2922 // Copy exception table
2923 if (exception_table_length > 0) {
2924 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2925 m->exception_table_start(),
2926 exception_table_length * sizeof(ExceptionTableElement),
2927 sizeof(u2));
2928 }
2929
2930 // Copy method parameters
2931 if (method_parameters_length > 0) {
2932 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2933 for (int i = 0; i < method_parameters_length; i++) {
2934 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2935 method_parameters_data += 2;
2936 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2937 method_parameters_data += 2;
2938 }
2939 }
2940
2941 // Copy checked exceptions
2942 if (checked_exceptions_length > 0) {
2943 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2944 m->checked_exceptions_start(),
2945 checked_exceptions_length * sizeof(CheckedExceptionElement),
2946 sizeof(u2));
2947 }
2948
2949 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2950 if (total_lvt_length > 0) {
2951 promoted_flags->set_has_localvariable_table();
2952 copy_localvariable_table(m->constMethod(),
2953 lvt_cnt,
2954 localvariable_table_length,
2955 localvariable_table_start,
2956 lvtt_cnt,
2957 localvariable_type_table_length,
2958 localvariable_type_table_start,
2959 CHECK_NULL);
2960 }
2961
2962 if (parsed_annotations.has_any_annotations())
2963 parsed_annotations.apply_to(methodHandle(THREAD, m));
2964
2965 if (is_hidden()) { // Mark methods in hidden classes as 'hidden'.
2966 m->set_hidden(true);
2967 }
2968
2969 // Copy annotations
2970 copy_method_annotations(m->constMethod(),
2971 runtime_visible_annotations,
2972 runtime_visible_annotations_length,
2973 runtime_invisible_annotations,
2974 runtime_invisible_annotations_length,
2975 runtime_visible_parameter_annotations,
2976 runtime_visible_parameter_annotations_length,
2977 runtime_invisible_parameter_annotations,
2978 runtime_invisible_parameter_annotations_length,
2979 runtime_visible_type_annotations,
2980 runtime_visible_type_annotations_length,
2981 runtime_invisible_type_annotations,
2982 runtime_invisible_type_annotations_length,
2983 annotation_default,
2984 annotation_default_length,
2985 CHECK_NULL);
2986
2987 if (InstanceKlass::is_finalization_enabled() &&
2988 name == vmSymbols::finalize_method_name() &&
2989 signature == vmSymbols::void_method_signature()) {
2990 if (m->is_empty_method()) {
2991 _has_empty_finalizer = true;
2992 } else {
2993 _has_finalizer = true;
2994 }
2995 }
2996 if (name == vmSymbols::object_initializer_name() &&
2997 signature == vmSymbols::void_method_signature() &&
2998 m->is_vanilla_constructor()) {
2999 _has_vanilla_constructor = true;
3000 }
3001
3002 NOT_PRODUCT(m->verify());
3003 return m;
3004 }
3005
3006
3007 // The promoted_flags parameter is used to pass relevant access_flags
3008 // from the methods back up to the containing klass. These flag values
3009 // are added to klass's access_flags.
3010 // Side-effects: populates the _methods field in the parser
3011 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
3012 bool is_interface,
3013 bool is_inline_type,
3014 bool is_abstract_type,
3015 AccessFlags* promoted_flags,
3016 bool* has_final_method,
3017 bool* declares_nonstatic_concrete_methods,
3018 TRAPS) {
3019 assert(cfs != NULL, "invariant");
3020 assert(promoted_flags != NULL, "invariant");
3021 assert(has_final_method != NULL, "invariant");
3022 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
3023
3024 assert(NULL == _methods, "invariant");
3025
3026 cfs->guarantee_more(2, CHECK); // length
3027 const u2 length = cfs->get_u2_fast();
3028 if (length == 0) {
3029 _methods = Universe::the_empty_method_array();
3030 } else {
3031 _methods = MetadataFactory::new_array<Method*>(_loader_data,
3032 length,
3033 NULL,
3034 CHECK);
3035
3036 for (int index = 0; index < length; index++) {
3037 Method* method = parse_method(cfs,
3038 is_interface,
3039 is_inline_type,
3040 is_abstract_type,
3041 _cp,
3042 promoted_flags,
3043 CHECK);
3044
3045 if (method->is_final()) {
3046 *has_final_method = true;
3047 }
3048 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
3049 // used for interface initialization, and default method inheritance analysis
3050 if (is_interface && !(*declares_nonstatic_concrete_methods)
3051 && !method->is_abstract() && !method->is_static()) {
3052 *declares_nonstatic_concrete_methods = true;
3053 }
3054 _methods->at_put(index, method);
3055 }
3056
3057 if (_need_verify && length > 1) {
3058 // Check duplicated methods
3059 ResourceMark rm(THREAD);
3060 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
3061 THREAD, NameSigHash*, HASH_ROW_SIZE);
3062 initialize_hashtable(names_and_sigs);
3063 bool dup = false;
3064 const Symbol* name = NULL;
3065 const Symbol* sig = NULL;
3066 {
3067 debug_only(NoSafepointVerifier nsv;)
3068 for (int i = 0; i < length; i++) {
3069 const Method* const m = _methods->at(i);
3070 name = m->name();
3071 sig = m->signature();
3072 // If no duplicates, add name/signature in hashtable names_and_sigs.
3073 if (!put_after_lookup(name, sig, names_and_sigs)) {
3074 dup = true;
3075 break;
3076 }
3077 }
3078 }
3079 if (dup) {
3080 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
3081 name->as_C_string(), sig->as_klass_external_name(), THREAD);
3082 }
3083 }
3084 }
3085 }
3086
3087 static const intArray* sort_methods(Array<Method*>* methods) {
3088 const int length = methods->length();
3089 // If JVMTI original method ordering or sharing is enabled we have to
3090 // remember the original class file ordering.
3091 // We temporarily use the vtable_index field in the Method* to store the
3092 // class file index, so we can read in after calling qsort.
3093 // Put the method ordering in the shared archive.
3094 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3095 for (int index = 0; index < length; index++) {
3096 Method* const m = methods->at(index);
3097 assert(!m->valid_vtable_index(), "vtable index should not be set");
3098 m->set_vtable_index(index);
3099 }
3100 }
3101 // Sort method array by ascending method name (for faster lookups & vtable construction)
3102 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3103 Method::sort_methods(methods);
3104
3105 intArray* method_ordering = NULL;
3106 // If JVMTI original method ordering or sharing is enabled construct int
3107 // array remembering the original ordering
3108 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3109 method_ordering = new intArray(length, length, -1);
3110 for (int index = 0; index < length; index++) {
3111 Method* const m = methods->at(index);
3112 const int old_index = m->vtable_index();
3113 assert(old_index >= 0 && old_index < length, "invalid method index");
3114 method_ordering->at_put(index, old_index);
3115 m->set_vtable_index(Method::invalid_vtable_index);
3116 }
3117 }
3118 return method_ordering;
3119 }
3120
3121 // Parse generic_signature attribute for methods and fields
3122 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3123 TRAPS) {
3124 assert(cfs != NULL, "invariant");
3125
3126 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3127 const u2 generic_signature_index = cfs->get_u2_fast();
3128 check_property(
3129 valid_symbol_at(generic_signature_index),
3130 "Invalid Signature attribute at constant pool index %u in class file %s",
3131 generic_signature_index, CHECK_0);
3132 return generic_signature_index;
3133 }
3134
3135 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3136 TRAPS) {
3137
3138 assert(cfs != NULL, "invariant");
3139
3140 cfs->guarantee_more(2, CHECK); // sourcefile_index
3141 const u2 sourcefile_index = cfs->get_u2_fast();
3142 check_property(
3143 valid_symbol_at(sourcefile_index),
3144 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3145 sourcefile_index, CHECK);
3146 set_class_sourcefile_index(sourcefile_index);
3147 }
3148
3149 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3150 int length,
3151 TRAPS) {
3152 assert(cfs != NULL, "invariant");
3153
3154 const u1* const sde_buffer = cfs->current();
3155 assert(sde_buffer != NULL, "null sde buffer");
3156
3157 // Don't bother storing it if there is no way to retrieve it
3158 if (JvmtiExport::can_get_source_debug_extension()) {
3159 assert((length+1) > length, "Overflow checking");
3160 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3161 for (int i = 0; i < length; i++) {
3162 sde[i] = sde_buffer[i];
3163 }
3164 sde[length] = '\0';
3165 set_class_sde_buffer((const char*)sde, length);
3166 }
3167 // Got utf8 string, set stream position forward
3168 cfs->skip_u1(length, CHECK);
3169 }
3170
3171
3172 // Inner classes can be static, private or protected (classic VM does this)
3173 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3174 JVM_ACC_PRIVATE | \
3175 JVM_ACC_PROTECTED | \
3176 JVM_ACC_STATIC \
3177 )
3178
3179 // Find index of the InnerClasses entry for the specified inner_class_info_index.
3180 // Return -1 if none is found.
3181 static int inner_classes_find_index(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
3182 Symbol* cp_klass_name = cp->klass_name_at(inner);
3183 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
3184 int idx_inner = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
3185 if (cp->klass_name_at(idx_inner) == cp_klass_name) {
3186 return idx;
3187 }
3188 }
3189 return -1;
3190 }
3191
3192 // Return the outer_class_info_index for the InnerClasses entry containing the
3193 // specified inner_class_info_index. Return -1 if no InnerClasses entry is found.
3194 static int inner_classes_jump_to_outer(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
3195 if (inner == 0) return -1;
3196 int idx = inner_classes_find_index(inner_classes, inner, cp, length);
3197 if (idx == -1) return -1;
3198 int result = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
3199 return result;
3200 }
3201
3202 // Return true if circularity is found, false if no circularity is found.
3203 // Use Floyd's cycle finding algorithm.
3204 static bool inner_classes_check_loop_through_outer(const Array<u2>* inner_classes, int idx, const ConstantPool* cp, int length) {
3205 int slow = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
3206 int fast = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
3207
3208 while (fast != -1 && fast != 0) {
3209 if (slow != 0 && (cp->klass_name_at(slow) == cp->klass_name_at(fast))) {
3210 return true; // found a circularity
3211 }
3212 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
3213 if (fast == -1) return false;
3214 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
3215 if (fast == -1) return false;
3216 slow = inner_classes_jump_to_outer(inner_classes, slow, cp, length);
3217 assert(slow != -1, "sanity check");
3218 }
3219 return false;
3220 }
3221
3222 // Loop through each InnerClasses entry checking for circularities and duplications
3223 // with other entries. If duplicate entries are found then throw CFE. Otherwise,
3224 // return true if a circularity or entries with duplicate inner_class_info_indexes
3225 // are found.
3226 bool ClassFileParser::check_inner_classes_circularity(const ConstantPool* cp, int length, TRAPS) {
3227 // Loop through each InnerClasses entry.
3228 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
3229 // Return true if there are circular entries.
3230 if (inner_classes_check_loop_through_outer(_inner_classes, idx, cp, length)) {
3231 return true;
3232 }
3233 // Check if there are duplicate entries or entries with the same inner_class_info_index.
3234 for (int y = idx + InstanceKlass::inner_class_next_offset; y < length;
3235 y += InstanceKlass::inner_class_next_offset) {
3236
3237 // 4347400: make sure there's no duplicate entry in the classes array
3238 if (_major_version >= JAVA_1_5_VERSION) {
3239 guarantee_property((_inner_classes->at(idx) != _inner_classes->at(y) ||
3240 _inner_classes->at(idx+1) != _inner_classes->at(y+1) ||
3241 _inner_classes->at(idx+2) != _inner_classes->at(y+2) ||
3242 _inner_classes->at(idx+3) != _inner_classes->at(y+3)),
3243 "Duplicate entry in InnerClasses attribute in class file %s",
3244 CHECK_(true));
3245 }
3246 // Return true if there are two entries with the same inner_class_info_index.
3247 if (_inner_classes->at(y) == _inner_classes->at(idx)) {
3248 return true;
3249 }
3250 }
3251 }
3252 return false;
3253 }
3254
3255 // Return number of classes in the inner classes attribute table
3256 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3257 const ConstantPool* cp,
3258 const u1* const inner_classes_attribute_start,
3259 bool parsed_enclosingmethod_attribute,
3260 u2 enclosing_method_class_index,
3261 u2 enclosing_method_method_index,
3262 TRAPS) {
3263 const u1* const current_mark = cfs->current();
3264 u2 length = 0;
3265 if (inner_classes_attribute_start != NULL) {
3266 cfs->set_current(inner_classes_attribute_start);
3267 cfs->guarantee_more(2, CHECK_0); // length
3268 length = cfs->get_u2_fast();
3269 }
3270
3271 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3272 // method data:
3273 // [inner_class_info_index,
3274 // outer_class_info_index,
3275 // inner_name_index,
3276 // inner_class_access_flags,
3277 // ...
3278 // enclosing_method_class_index,
3279 // enclosing_method_method_index]
3280 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3281 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3282 _inner_classes = inner_classes;
3283
3284 int index = 0;
3285 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3286 for (int n = 0; n < length; n++) {
3287 // Inner class index
3288 const u2 inner_class_info_index = cfs->get_u2_fast();
3289 check_property(
3290 valid_klass_reference_at(inner_class_info_index),
3291 "inner_class_info_index %u has bad constant type in class file %s",
3292 inner_class_info_index, CHECK_0);
3293 // Outer class index
3294 const u2 outer_class_info_index = cfs->get_u2_fast();
3295 check_property(
3296 outer_class_info_index == 0 ||
3297 valid_klass_reference_at(outer_class_info_index),
3298 "outer_class_info_index %u has bad constant type in class file %s",
3299 outer_class_info_index, CHECK_0);
3300
3301 if (outer_class_info_index != 0) {
3302 const Symbol* const outer_class_name = cp->klass_name_at(outer_class_info_index);
3303 char* bytes = (char*)outer_class_name->bytes();
3304 guarantee_property(bytes[0] != JVM_SIGNATURE_ARRAY,
3305 "Outer class is an array class in class file %s", CHECK_0);
3306 }
3307 // Inner class name
3308 const u2 inner_name_index = cfs->get_u2_fast();
3309 check_property(
3310 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3311 "inner_name_index %u has bad constant type in class file %s",
3312 inner_name_index, CHECK_0);
3313 if (_need_verify) {
3314 guarantee_property(inner_class_info_index != outer_class_info_index,
3315 "Class is both outer and inner class in class file %s", CHECK_0);
3316 }
3317
3318 jint recognized_modifiers = RECOGNIZED_INNER_CLASS_MODIFIERS;
3319 // JVM_ACC_MODULE is defined in JDK-9 and later.
3320 if (_major_version >= JAVA_9_VERSION) {
3321 recognized_modifiers |= JVM_ACC_MODULE;
3322 }
3323 // JVM_ACC_VALUE and JVM_ACC_PRIMITIVE are defined for class file version 62 and later
3324 if (supports_inline_types()) {
3325 recognized_modifiers |= JVM_ACC_PRIMITIVE | JVM_ACC_VALUE;
3326 }
3327
3328 // Access flags
3329 jint flags = cfs->get_u2_fast() & recognized_modifiers;
3330
3331 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3332 // Set abstract bit for old class files for backward compatibility
3333 flags |= JVM_ACC_ABSTRACT;
3334 }
3335 verify_legal_class_modifiers(flags, CHECK_0);
3336 AccessFlags inner_access_flags(flags);
3337
3338 inner_classes->at_put(index++, inner_class_info_index);
3339 inner_classes->at_put(index++, outer_class_info_index);
3340 inner_classes->at_put(index++, inner_name_index);
3341 inner_classes->at_put(index++, inner_access_flags.as_short());
3342 }
3343
3344 // Check for circular and duplicate entries.
3345 bool has_circularity = false;
3346 if (_need_verify) {
3347 has_circularity = check_inner_classes_circularity(cp, length * 4, CHECK_0);
3348 if (has_circularity) {
3349 // If circularity check failed then ignore InnerClasses attribute.
3350 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
3351 index = 0;
3352 if (parsed_enclosingmethod_attribute) {
3353 inner_classes = MetadataFactory::new_array<u2>(_loader_data, 2, CHECK_0);
3354 _inner_classes = inner_classes;
3355 } else {
3356 _inner_classes = Universe::the_empty_short_array();
3357 }
3358 }
3359 }
3360 // Set EnclosingMethod class and method indexes.
3361 if (parsed_enclosingmethod_attribute) {
3362 inner_classes->at_put(index++, enclosing_method_class_index);
3363 inner_classes->at_put(index++, enclosing_method_method_index);
3364 }
3365 assert(index == size || has_circularity, "wrong size");
3366
3367 // Restore buffer's current position.
3368 cfs->set_current(current_mark);
3369
3370 return length;
3371 }
3372
3373 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3374 const u1* const nest_members_attribute_start,
3375 TRAPS) {
3376 const u1* const current_mark = cfs->current();
3377 u2 length = 0;
3378 if (nest_members_attribute_start != NULL) {
3379 cfs->set_current(nest_members_attribute_start);
3380 cfs->guarantee_more(2, CHECK_0); // length
3381 length = cfs->get_u2_fast();
3382 }
3383 const int size = length;
3384 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3385 _nest_members = nest_members;
3386
3387 int index = 0;
3388 cfs->guarantee_more(2 * length, CHECK_0);
3389 for (int n = 0; n < length; n++) {
3390 const u2 class_info_index = cfs->get_u2_fast();
3391 check_property(
3392 valid_klass_reference_at(class_info_index),
3393 "Nest member class_info_index %u has bad constant type in class file %s",
3394 class_info_index, CHECK_0);
3395 nest_members->at_put(index++, class_info_index);
3396 }
3397 assert(index == size, "wrong size");
3398
3399 // Restore buffer's current position.
3400 cfs->set_current(current_mark);
3401
3402 return length;
3403 }
3404
3405 u2 ClassFileParser::parse_classfile_permitted_subclasses_attribute(const ClassFileStream* const cfs,
3406 const u1* const permitted_subclasses_attribute_start,
3407 TRAPS) {
3408 const u1* const current_mark = cfs->current();
3409 u2 length = 0;
3410 if (permitted_subclasses_attribute_start != NULL) {
3411 cfs->set_current(permitted_subclasses_attribute_start);
3412 cfs->guarantee_more(2, CHECK_0); // length
3413 length = cfs->get_u2_fast();
3414 }
3415 const int size = length;
3416 Array<u2>* const permitted_subclasses = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3417 _permitted_subclasses = permitted_subclasses;
3418
3419 if (length > 0) {
3420 int index = 0;
3421 cfs->guarantee_more(2 * length, CHECK_0);
3422 for (int n = 0; n < length; n++) {
3423 const u2 class_info_index = cfs->get_u2_fast();
3424 check_property(
3425 valid_klass_reference_at(class_info_index),
3426 "Permitted subclass class_info_index %u has bad constant type in class file %s",
3427 class_info_index, CHECK_0);
3428 permitted_subclasses->at_put(index++, class_info_index);
3429 }
3430 assert(index == size, "wrong size");
3431 }
3432
3433 // Restore buffer's current position.
3434 cfs->set_current(current_mark);
3435
3436 return length;
3437 }
3438
3439 u2 ClassFileParser::parse_classfile_preload_attribute(const ClassFileStream* const cfs,
3440 const u1* const preload_attribute_start,
3441 TRAPS) {
3442 const u1* const current_mark = cfs->current();
3443 u2 length = 0;
3444 if (preload_attribute_start != NULL) {
3445 cfs->set_current(preload_attribute_start);
3446 cfs->guarantee_more(2, CHECK_0); // length
3447 length = cfs->get_u2_fast();
3448 }
3449 const int size = length;
3450 Array<u2>* const preload_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3451 _preload_classes = preload_classes;
3452 if (length > 0) {
3453 int index = 0;
3454 cfs->guarantee_more(2 * length, CHECK_0);
3455 for (int n = 0; n < length; n++) {
3456 const u2 class_info_index = cfs->get_u2_fast();
3457 check_property(
3458 valid_klass_reference_at(class_info_index),
3459 "Preload class_info_index %u has bad constant type in class file %s",
3460 class_info_index, CHECK_0);
3461 preload_classes->at_put(index++, class_info_index);
3462 }
3463 assert(index == size, "wrong size");
3464 }
3465
3466 // Restore buffer's current position.
3467 cfs->set_current(current_mark);
3468
3469 return length;
3470 }
3471
3472 // Record {
3473 // u2 attribute_name_index;
3474 // u4 attribute_length;
3475 // u2 components_count;
3476 // component_info components[components_count];
3477 // }
3478 // component_info {
3479 // u2 name_index;
3480 // u2 descriptor_index
3481 // u2 attributes_count;
3482 // attribute_info_attributes[attributes_count];
3483 // }
3484 u2 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3485 const ConstantPool* cp,
3486 const u1* const record_attribute_start,
3487 TRAPS) {
3488 const u1* const current_mark = cfs->current();
3489 int components_count = 0;
3490 unsigned int calculate_attr_size = 0;
3491 if (record_attribute_start != NULL) {
3492 cfs->set_current(record_attribute_start);
3493 cfs->guarantee_more(2, CHECK_0); // num of components
3494 components_count = (int)cfs->get_u2_fast();
3495 calculate_attr_size = 2;
3496 }
3497
3498 Array<RecordComponent*>* const record_components =
3499 MetadataFactory::new_array<RecordComponent*>(_loader_data, components_count, NULL, CHECK_0);
3500 _record_components = record_components;
3501
3502 for (int x = 0; x < components_count; x++) {
3503 cfs->guarantee_more(6, CHECK_0); // name_index, descriptor_index, attributes_count
3504
3505 const u2 name_index = cfs->get_u2_fast();
3506 check_property(valid_symbol_at(name_index),
3507 "Invalid constant pool index %u for name in Record attribute in class file %s",
3508 name_index, CHECK_0);
3509 const Symbol* const name = cp->symbol_at(name_index);
3510 verify_legal_field_name(name, CHECK_0);
3511
3512 const u2 descriptor_index = cfs->get_u2_fast();
3513 check_property(valid_symbol_at(descriptor_index),
3514 "Invalid constant pool index %u for descriptor in Record attribute in class file %s",
3515 descriptor_index, CHECK_0);
3516 const Symbol* const descr = cp->symbol_at(descriptor_index);
3517 verify_legal_field_signature(name, descr, CHECK_0);
3518
3519 const u2 attributes_count = cfs->get_u2_fast();
3520 calculate_attr_size += 6;
3521 u2 generic_sig_index = 0;
3522 const u1* runtime_visible_annotations = NULL;
3523 int runtime_visible_annotations_length = 0;
3524 const u1* runtime_invisible_annotations = NULL;
3525 int runtime_invisible_annotations_length = 0;
3526 bool runtime_invisible_annotations_exists = false;
3527 const u1* runtime_visible_type_annotations = NULL;
3528 int runtime_visible_type_annotations_length = 0;
3529 const u1* runtime_invisible_type_annotations = NULL;
3530 int runtime_invisible_type_annotations_length = 0;
3531 bool runtime_invisible_type_annotations_exists = false;
3532
3533 // Expected attributes for record components are Signature, Runtime(In)VisibleAnnotations,
3534 // and Runtime(In)VisibleTypeAnnotations. Other attributes are ignored.
3535 for (int y = 0; y < attributes_count; y++) {
3536 cfs->guarantee_more(6, CHECK_0); // attribute_name_index, attribute_length
3537 const u2 attribute_name_index = cfs->get_u2_fast();
3538 const u4 attribute_length = cfs->get_u4_fast();
3539 calculate_attr_size += 6;
3540 check_property(
3541 valid_symbol_at(attribute_name_index),
3542 "Invalid Record attribute name index %u in class file %s",
3543 attribute_name_index, CHECK_0);
3544
3545 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
3546 if (attribute_name == vmSymbols::tag_signature()) {
3547 if (generic_sig_index != 0) {
3548 classfile_parse_error(
3549 "Multiple Signature attributes for Record component in class file %s",
3550 THREAD);
3551 return 0;
3552 }
3553 if (attribute_length != 2) {
3554 classfile_parse_error(
3555 "Invalid Signature attribute length %u in Record component in class file %s",
3556 attribute_length, THREAD);
3557 return 0;
3558 }
3559 generic_sig_index = parse_generic_signature_attribute(cfs, CHECK_0);
3560
3561 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
3562 if (runtime_visible_annotations != NULL) {
3563 classfile_parse_error(
3564 "Multiple RuntimeVisibleAnnotations attributes for Record component in class file %s", THREAD);
3565 return 0;
3566 }
3567 runtime_visible_annotations_length = attribute_length;
3568 runtime_visible_annotations = cfs->current();
3569
3570 assert(runtime_visible_annotations != NULL, "null record component visible annotation");
3571 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_0);
3572 cfs->skip_u1_fast(runtime_visible_annotations_length);
3573
3574 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
3575 if (runtime_invisible_annotations_exists) {
3576 classfile_parse_error(
3577 "Multiple RuntimeInvisibleAnnotations attributes for Record component in class file %s", THREAD);
3578 return 0;
3579 }
3580 runtime_invisible_annotations_exists = true;
3581 if (PreserveAllAnnotations) {
3582 runtime_invisible_annotations_length = attribute_length;
3583 runtime_invisible_annotations = cfs->current();
3584 assert(runtime_invisible_annotations != NULL, "null record component invisible annotation");
3585 }
3586 cfs->skip_u1(attribute_length, CHECK_0);
3587
3588 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
3589 if (runtime_visible_type_annotations != NULL) {
3590 classfile_parse_error(
3591 "Multiple RuntimeVisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3592 return 0;
3593 }
3594 runtime_visible_type_annotations_length = attribute_length;
3595 runtime_visible_type_annotations = cfs->current();
3596
3597 assert(runtime_visible_type_annotations != NULL, "null record component visible type annotation");
3598 cfs->guarantee_more(runtime_visible_type_annotations_length, CHECK_0);
3599 cfs->skip_u1_fast(runtime_visible_type_annotations_length);
3600
3601 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
3602 if (runtime_invisible_type_annotations_exists) {
3603 classfile_parse_error(
3604 "Multiple RuntimeInvisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3605 return 0;
3606 }
3607 runtime_invisible_type_annotations_exists = true;
3608 if (PreserveAllAnnotations) {
3609 runtime_invisible_type_annotations_length = attribute_length;
3610 runtime_invisible_type_annotations = cfs->current();
3611 assert(runtime_invisible_type_annotations != NULL, "null record component invisible type annotation");
3612 }
3613 cfs->skip_u1(attribute_length, CHECK_0);
3614
3615 } else {
3616 // Skip unknown attributes
3617 cfs->skip_u1(attribute_length, CHECK_0);
3618 }
3619 calculate_attr_size += attribute_length;
3620 } // End of attributes For loop
3621
3622 AnnotationArray* annotations = assemble_annotations(runtime_visible_annotations,
3623 runtime_visible_annotations_length,
3624 runtime_invisible_annotations,
3625 runtime_invisible_annotations_length,
3626 CHECK_0);
3627 AnnotationArray* type_annotations = assemble_annotations(runtime_visible_type_annotations,
3628 runtime_visible_type_annotations_length,
3629 runtime_invisible_type_annotations,
3630 runtime_invisible_type_annotations_length,
3631 CHECK_0);
3632
3633 RecordComponent* record_component =
3634 RecordComponent::allocate(_loader_data, name_index, descriptor_index,
3635 attributes_count, generic_sig_index,
3636 annotations, type_annotations, CHECK_0);
3637 record_components->at_put(x, record_component);
3638 } // End of component processing loop
3639
3640 // Restore buffer's current position.
3641 cfs->set_current(current_mark);
3642 return calculate_attr_size;
3643 }
3644
3645 void ClassFileParser::parse_classfile_synthetic_attribute() {
3646 set_class_synthetic_flag(true);
3647 }
3648
3649 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3650 assert(cfs != NULL, "invariant");
3651
3652 const u2 signature_index = cfs->get_u2(CHECK);
3653 check_property(
3654 valid_symbol_at(signature_index),
3655 "Invalid constant pool index %u in Signature attribute in class file %s",
3656 signature_index, CHECK);
3657 set_class_generic_signature_index(signature_index);
3658 }
3659
3660 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3661 ConstantPool* cp,
3662 u4 attribute_byte_length,
3663 TRAPS) {
3664 assert(cfs != NULL, "invariant");
3665 assert(cp != NULL, "invariant");
3666
3667 const u1* const current_start = cfs->current();
3668
3669 guarantee_property(attribute_byte_length >= sizeof(u2),
3670 "Invalid BootstrapMethods attribute length %u in class file %s",
3671 attribute_byte_length,
3672 CHECK);
3673
3674 cfs->guarantee_more(attribute_byte_length, CHECK);
3675
3676 const int attribute_array_length = cfs->get_u2_fast();
3677
3678 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3679 "Short length on BootstrapMethods in class file %s",
3680 CHECK);
3681
3682
3683 // The attribute contains a counted array of counted tuples of shorts,
3684 // represending bootstrap specifiers:
3685 // length*{bootstrap_method_index, argument_count*{argument_index}}
3686 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3687 // operand_count = number of shorts in attr, except for leading length
3688
3689 // The attribute is copied into a short[] array.
3690 // The array begins with a series of short[2] pairs, one for each tuple.
3691 const int index_size = (attribute_array_length * 2);
3692
3693 Array<u2>* const operands =
3694 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3695
3696 // Eagerly assign operands so they will be deallocated with the constant
3697 // pool if there is an error.
3698 cp->set_operands(operands);
3699
3700 int operand_fill_index = index_size;
3701 const int cp_size = cp->length();
3702
3703 for (int n = 0; n < attribute_array_length; n++) {
3704 // Store a 32-bit offset into the header of the operand array.
3705 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3706
3707 // Read a bootstrap specifier.
3708 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3709 const u2 bootstrap_method_index = cfs->get_u2_fast();
3710 const u2 argument_count = cfs->get_u2_fast();
3711 check_property(
3712 valid_cp_range(bootstrap_method_index, cp_size) &&
3713 cp->tag_at(bootstrap_method_index).is_method_handle(),
3714 "bootstrap_method_index %u has bad constant type in class file %s",
3715 bootstrap_method_index,
3716 CHECK);
3717
3718 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3719 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3720 CHECK);
3721
3722 operands->at_put(operand_fill_index++, bootstrap_method_index);
3723 operands->at_put(operand_fill_index++, argument_count);
3724
3725 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3726 for (int j = 0; j < argument_count; j++) {
3727 const u2 argument_index = cfs->get_u2_fast();
3728 check_property(
3729 valid_cp_range(argument_index, cp_size) &&
3730 cp->tag_at(argument_index).is_loadable_constant(),
3731 "argument_index %u has bad constant type in class file %s",
3732 argument_index,
3733 CHECK);
3734 operands->at_put(operand_fill_index++, argument_index);
3735 }
3736 }
3737 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3738 "Bad length on BootstrapMethods in class file %s",
3739 CHECK);
3740 }
3741
3742 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3743 ConstantPool* cp,
3744 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3745 TRAPS) {
3746 assert(cfs != NULL, "invariant");
3747 assert(cp != NULL, "invariant");
3748 assert(parsed_annotations != NULL, "invariant");
3749
3750 // Set inner classes attribute to default sentinel
3751 _inner_classes = Universe::the_empty_short_array();
3752 // Set nest members attribute to default sentinel
3753 _nest_members = Universe::the_empty_short_array();
3754 // Set _permitted_subclasses attribute to default sentinel
3755 _permitted_subclasses = Universe::the_empty_short_array();
3756 // Set _preload_classes attribute to default sentinel
3757 _preload_classes = Universe::the_empty_short_array();
3758 cfs->guarantee_more(2, CHECK); // attributes_count
3759 u2 attributes_count = cfs->get_u2_fast();
3760 bool parsed_sourcefile_attribute = false;
3761 bool parsed_innerclasses_attribute = false;
3762 bool parsed_nest_members_attribute = false;
3763 bool parsed_permitted_subclasses_attribute = false;
3764 bool parsed_preload_attribute = false;
3765 bool parsed_nest_host_attribute = false;
3766 bool parsed_record_attribute = false;
3767 bool parsed_enclosingmethod_attribute = false;
3768 bool parsed_bootstrap_methods_attribute = false;
3769 const u1* runtime_visible_annotations = NULL;
3770 int runtime_visible_annotations_length = 0;
3771 const u1* runtime_invisible_annotations = NULL;
3772 int runtime_invisible_annotations_length = 0;
3773 const u1* runtime_visible_type_annotations = NULL;
3774 int runtime_visible_type_annotations_length = 0;
3775 const u1* runtime_invisible_type_annotations = NULL;
3776 int runtime_invisible_type_annotations_length = 0;
3777 bool runtime_invisible_type_annotations_exists = false;
3778 bool runtime_invisible_annotations_exists = false;
3779 bool parsed_source_debug_ext_annotations_exist = false;
3780 const u1* inner_classes_attribute_start = NULL;
3781 u4 inner_classes_attribute_length = 0;
3782 u2 enclosing_method_class_index = 0;
3783 u2 enclosing_method_method_index = 0;
3784 const u1* nest_members_attribute_start = NULL;
3785 u4 nest_members_attribute_length = 0;
3786 const u1* record_attribute_start = NULL;
3787 u4 record_attribute_length = 0;
3788 const u1* permitted_subclasses_attribute_start = NULL;
3789 u4 permitted_subclasses_attribute_length = 0;
3790 const u1* preload_attribute_start = NULL;
3791 u4 preload_attribute_length = 0;
3792
3793 // Iterate over attributes
3794 while (attributes_count--) {
3795 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3796 const u2 attribute_name_index = cfs->get_u2_fast();
3797 const u4 attribute_length = cfs->get_u4_fast();
3798 check_property(
3799 valid_symbol_at(attribute_name_index),
3800 "Attribute name has bad constant pool index %u in class file %s",
3801 attribute_name_index, CHECK);
3802 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3803 if (tag == vmSymbols::tag_source_file()) {
3804 // Check for SourceFile tag
3805 if (_need_verify) {
3806 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3807 }
3808 if (parsed_sourcefile_attribute) {
3809 classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3810 return;
3811 } else {
3812 parsed_sourcefile_attribute = true;
3813 }
3814 parse_classfile_sourcefile_attribute(cfs, CHECK);
3815 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3816 // Check for SourceDebugExtension tag
3817 if (parsed_source_debug_ext_annotations_exist) {
3818 classfile_parse_error(
3819 "Multiple SourceDebugExtension attributes in class file %s", THREAD);
3820 return;
3821 }
3822 parsed_source_debug_ext_annotations_exist = true;
3823 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3824 } else if (tag == vmSymbols::tag_inner_classes()) {
3825 // Check for InnerClasses tag
3826 if (parsed_innerclasses_attribute) {
3827 classfile_parse_error("Multiple InnerClasses attributes in class file %s", THREAD);
3828 return;
3829 } else {
3830 parsed_innerclasses_attribute = true;
3831 }
3832 inner_classes_attribute_start = cfs->current();
3833 inner_classes_attribute_length = attribute_length;
3834 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3835 } else if (tag == vmSymbols::tag_synthetic()) {
3836 // Check for Synthetic tag
3837 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3838 if (attribute_length != 0) {
3839 classfile_parse_error(
3840 "Invalid Synthetic classfile attribute length %u in class file %s",
3841 attribute_length, THREAD);
3842 return;
3843 }
3844 parse_classfile_synthetic_attribute();
3845 } else if (tag == vmSymbols::tag_deprecated()) {
3846 // Check for Deprecated tag - 4276120
3847 if (attribute_length != 0) {
3848 classfile_parse_error(
3849 "Invalid Deprecated classfile attribute length %u in class file %s",
3850 attribute_length, THREAD);
3851 return;
3852 }
3853 } else if (_major_version >= JAVA_1_5_VERSION) {
3854 if (tag == vmSymbols::tag_signature()) {
3855 if (_generic_signature_index != 0) {
3856 classfile_parse_error(
3857 "Multiple Signature attributes in class file %s", THREAD);
3858 return;
3859 }
3860 if (attribute_length != 2) {
3861 classfile_parse_error(
3862 "Wrong Signature attribute length %u in class file %s",
3863 attribute_length, THREAD);
3864 return;
3865 }
3866 parse_classfile_signature_attribute(cfs, CHECK);
3867 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3868 if (runtime_visible_annotations != NULL) {
3869 classfile_parse_error(
3870 "Multiple RuntimeVisibleAnnotations attributes in class file %s", THREAD);
3871 return;
3872 }
3873 runtime_visible_annotations_length = attribute_length;
3874 runtime_visible_annotations = cfs->current();
3875 assert(runtime_visible_annotations != NULL, "null visible annotations");
3876 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3877 parse_annotations(cp,
3878 runtime_visible_annotations,
3879 runtime_visible_annotations_length,
3880 parsed_annotations,
3881 _loader_data,
3882 _can_access_vm_annotations);
3883 cfs->skip_u1_fast(runtime_visible_annotations_length);
3884 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3885 if (runtime_invisible_annotations_exists) {
3886 classfile_parse_error(
3887 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", THREAD);
3888 return;
3889 }
3890 runtime_invisible_annotations_exists = true;
3891 if (PreserveAllAnnotations) {
3892 runtime_invisible_annotations_length = attribute_length;
3893 runtime_invisible_annotations = cfs->current();
3894 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3895 }
3896 cfs->skip_u1(attribute_length, CHECK);
3897 } else if (tag == vmSymbols::tag_enclosing_method()) {
3898 if (parsed_enclosingmethod_attribute) {
3899 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", THREAD);
3900 return;
3901 } else {
3902 parsed_enclosingmethod_attribute = true;
3903 }
3904 guarantee_property(attribute_length == 4,
3905 "Wrong EnclosingMethod attribute length %u in class file %s",
3906 attribute_length, CHECK);
3907 cfs->guarantee_more(4, CHECK); // class_index, method_index
3908 enclosing_method_class_index = cfs->get_u2_fast();
3909 enclosing_method_method_index = cfs->get_u2_fast();
3910 if (enclosing_method_class_index == 0) {
3911 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", THREAD);
3912 return;
3913 }
3914 // Validate the constant pool indices and types
3915 check_property(valid_klass_reference_at(enclosing_method_class_index),
3916 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3917 if (enclosing_method_method_index != 0 &&
3918 (!cp->is_within_bounds(enclosing_method_method_index) ||
3919 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3920 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", THREAD);
3921 return;
3922 }
3923 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3924 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3925 if (parsed_bootstrap_methods_attribute) {
3926 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", THREAD);
3927 return;
3928 }
3929 parsed_bootstrap_methods_attribute = true;
3930 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3931 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3932 if (runtime_visible_type_annotations != NULL) {
3933 classfile_parse_error(
3934 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", THREAD);
3935 return;
3936 }
3937 runtime_visible_type_annotations_length = attribute_length;
3938 runtime_visible_type_annotations = cfs->current();
3939 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3940 // No need for the VM to parse Type annotations
3941 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3942 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3943 if (runtime_invisible_type_annotations_exists) {
3944 classfile_parse_error(
3945 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", THREAD);
3946 return;
3947 } else {
3948 runtime_invisible_type_annotations_exists = true;
3949 }
3950 if (PreserveAllAnnotations) {
3951 runtime_invisible_type_annotations_length = attribute_length;
3952 runtime_invisible_type_annotations = cfs->current();
3953 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3954 }
3955 cfs->skip_u1(attribute_length, CHECK);
3956 } else if (_major_version >= JAVA_11_VERSION) {
3957 if (tag == vmSymbols::tag_nest_members()) {
3958 // Check for NestMembers tag
3959 if (parsed_nest_members_attribute) {
3960 classfile_parse_error("Multiple NestMembers attributes in class file %s", THREAD);
3961 return;
3962 } else {
3963 parsed_nest_members_attribute = true;
3964 }
3965 if (parsed_nest_host_attribute) {
3966 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", THREAD);
3967 return;
3968 }
3969 nest_members_attribute_start = cfs->current();
3970 nest_members_attribute_length = attribute_length;
3971 cfs->skip_u1(nest_members_attribute_length, CHECK);
3972 } else if (tag == vmSymbols::tag_nest_host()) {
3973 if (parsed_nest_host_attribute) {
3974 classfile_parse_error("Multiple NestHost attributes in class file %s", THREAD);
3975 return;
3976 } else {
3977 parsed_nest_host_attribute = true;
3978 }
3979 if (parsed_nest_members_attribute) {
3980 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", THREAD);
3981 return;
3982 }
3983 if (_need_verify) {
3984 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3985 }
3986 cfs->guarantee_more(2, CHECK);
3987 u2 class_info_index = cfs->get_u2_fast();
3988 check_property(
3989 valid_klass_reference_at(class_info_index),
3990 "Nest-host class_info_index %u has bad constant type in class file %s",
3991 class_info_index, CHECK);
3992 _nest_host = class_info_index;
3993
3994 } else if (_major_version >= JAVA_16_VERSION) {
3995 if (tag == vmSymbols::tag_record()) {
3996 if (parsed_record_attribute) {
3997 classfile_parse_error("Multiple Record attributes in class file %s", THREAD);
3998 return;
3999 }
4000 parsed_record_attribute = true;
4001 record_attribute_start = cfs->current();
4002 record_attribute_length = attribute_length;
4003 } else if (_major_version >= JAVA_17_VERSION) {
4004 if (tag == vmSymbols::tag_permitted_subclasses()) {
4005 if (parsed_permitted_subclasses_attribute) {
4006 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
4007 return;
4008 }
4009 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
4010 if (_access_flags.is_final()) {
4011 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
4012 return;
4013 }
4014 parsed_permitted_subclasses_attribute = true;
4015 permitted_subclasses_attribute_start = cfs->current();
4016 permitted_subclasses_attribute_length = attribute_length;
4017 }
4018 if (EnableValhalla && tag == vmSymbols::tag_preload()) {
4019 if (parsed_preload_attribute) {
4020 classfile_parse_error("Multiple Preload attributes in class file %s", CHECK);
4021 return;
4022 }
4023 parsed_preload_attribute = true;
4024 preload_attribute_start = cfs->current();
4025 preload_attribute_length = attribute_length;
4026 }
4027 }
4028 // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
4029 cfs->skip_u1(attribute_length, CHECK);
4030 } else {
4031 // Unknown attribute
4032 cfs->skip_u1(attribute_length, CHECK);
4033 }
4034 } else {
4035 // Unknown attribute
4036 cfs->skip_u1(attribute_length, CHECK);
4037 }
4038 } else {
4039 // Unknown attribute
4040 cfs->skip_u1(attribute_length, CHECK);
4041 }
4042 }
4043 _class_annotations = assemble_annotations(runtime_visible_annotations,
4044 runtime_visible_annotations_length,
4045 runtime_invisible_annotations,
4046 runtime_invisible_annotations_length,
4047 CHECK);
4048 _class_type_annotations = assemble_annotations(runtime_visible_type_annotations,
4049 runtime_visible_type_annotations_length,
4050 runtime_invisible_type_annotations,
4051 runtime_invisible_type_annotations_length,
4052 CHECK);
4053
4054 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
4055 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
4056 cfs,
4057 cp,
4058 inner_classes_attribute_start,
4059 parsed_innerclasses_attribute,
4060 enclosing_method_class_index,
4061 enclosing_method_method_index,
4062 CHECK);
4063 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
4064 guarantee_property(
4065 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
4066 "Wrong InnerClasses attribute length in class file %s", CHECK);
4067 }
4068 }
4069
4070 if (parsed_nest_members_attribute) {
4071 const u2 num_of_classes = parse_classfile_nest_members_attribute(
4072 cfs,
4073 nest_members_attribute_start,
4074 CHECK);
4075 if (_need_verify) {
4076 guarantee_property(
4077 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
4078 "Wrong NestMembers attribute length in class file %s", CHECK);
4079 }
4080 }
4081
4082 if (parsed_record_attribute) {
4083 const unsigned int calculated_attr_length = parse_classfile_record_attribute(
4084 cfs,
4085 cp,
4086 record_attribute_start,
4087 CHECK);
4088 if (_need_verify) {
4089 guarantee_property(record_attribute_length == calculated_attr_length,
4090 "Record attribute has wrong length in class file %s",
4091 CHECK);
4092 }
4093 }
4094
4095 if (parsed_permitted_subclasses_attribute) {
4096 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
4097 cfs,
4098 permitted_subclasses_attribute_start,
4099 CHECK);
4100 if (_need_verify) {
4101 guarantee_property(
4102 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
4103 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
4104 }
4105 }
4106
4107 if (parsed_preload_attribute) {
4108 const u2 num_classes = parse_classfile_preload_attribute(
4109 cfs,
4110 preload_attribute_start,
4111 CHECK);
4112 if (_need_verify) {
4113 guarantee_property(
4114 preload_attribute_length == sizeof(num_classes) + sizeof(u2) * num_classes,
4115 "Wrong Preload attribute length in class file %s", CHECK);
4116 }
4117 }
4118
4119 if (_max_bootstrap_specifier_index >= 0) {
4120 guarantee_property(parsed_bootstrap_methods_attribute,
4121 "Missing BootstrapMethods attribute in class file %s", CHECK);
4122 }
4123 }
4124
4125 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
4126 assert(k != NULL, "invariant");
4127
4128 if (_synthetic_flag)
4129 k->set_is_synthetic();
4130 if (_sourcefile_index != 0) {
4131 k->set_source_file_name_index(_sourcefile_index);
4132 }
4133 if (_generic_signature_index != 0) {
4134 k->set_generic_signature_index(_generic_signature_index);
4135 }
4136 if (_sde_buffer != NULL) {
4137 k->set_source_debug_extension(_sde_buffer, _sde_length);
4138 }
4139 }
4140
4141 // Create the Annotations object that will
4142 // hold the annotations array for the Klass.
4143 void ClassFileParser::create_combined_annotations(TRAPS) {
4144 if (_class_annotations == NULL &&
4145 _class_type_annotations == NULL &&
4146 _fields_annotations == NULL &&
4147 _fields_type_annotations == NULL) {
4148 // Don't create the Annotations object unnecessarily.
4149 return;
4150 }
4151
4152 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
4153 annotations->set_class_annotations(_class_annotations);
4154 annotations->set_class_type_annotations(_class_type_annotations);
4155 annotations->set_fields_annotations(_fields_annotations);
4156 annotations->set_fields_type_annotations(_fields_type_annotations);
4157
4158 // This is the Annotations object that will be
4159 // assigned to InstanceKlass being constructed.
4160 _combined_annotations = annotations;
4161
4162 // The annotations arrays below has been transfered the
4163 // _combined_annotations so these fields can now be cleared.
4164 _class_annotations = NULL;
4165 _class_type_annotations = NULL;
4166 _fields_annotations = NULL;
4167 _fields_type_annotations = NULL;
4168 }
4169
4170 // Transfer ownership of metadata allocated to the InstanceKlass.
4171 void ClassFileParser::apply_parsed_class_metadata(
4172 InstanceKlass* this_klass,
4173 int java_fields_count) {
4174 assert(this_klass != NULL, "invariant");
4175
4176 _cp->set_pool_holder(this_klass);
4177 this_klass->set_constants(_cp);
4178 this_klass->set_fields(_fields, java_fields_count);
4179 this_klass->set_methods(_methods);
4180 this_klass->set_inner_classes(_inner_classes);
4181 this_klass->set_nest_members(_nest_members);
4182 this_klass->set_nest_host_index(_nest_host);
4183 this_klass->set_preload_classes(_preload_classes);
4184 this_klass->set_annotations(_combined_annotations);
4185 this_klass->set_permitted_subclasses(_permitted_subclasses);
4186 this_klass->set_record_components(_record_components);
4187 // Delay the setting of _local_interfaces and _transitive_interfaces until after
4188 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
4189 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
4190 // its _super. If an OOM occurs while loading the current klass, its _super field
4191 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
4192 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
4193 // dereferences to the deallocated _transitive_interfaces will result in a crash.
4194
4195 // Clear out these fields so they don't get deallocated by the destructor
4196 clear_class_metadata();
4197 }
4198
4199 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
4200 int runtime_visible_annotations_length,
4201 const u1* const runtime_invisible_annotations,
4202 int runtime_invisible_annotations_length,
4203 TRAPS) {
4204 AnnotationArray* annotations = NULL;
4205 if (runtime_visible_annotations != NULL ||
4206 runtime_invisible_annotations != NULL) {
4207 annotations = MetadataFactory::new_array<u1>(_loader_data,
4208 runtime_visible_annotations_length +
4209 runtime_invisible_annotations_length,
4210 CHECK_(annotations));
4211 if (runtime_visible_annotations != NULL) {
4212 for (int i = 0; i < runtime_visible_annotations_length; i++) {
4213 annotations->at_put(i, runtime_visible_annotations[i]);
4214 }
4215 }
4216 if (runtime_invisible_annotations != NULL) {
4217 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
4218 int append = runtime_visible_annotations_length+i;
4219 annotations->at_put(append, runtime_invisible_annotations[i]);
4220 }
4221 }
4222 }
4223 return annotations;
4224 }
4225
4226 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
4227 const int super_class_index,
4228 const bool need_verify,
4229 TRAPS) {
4230 assert(cp != NULL, "invariant");
4231 const InstanceKlass* super_klass = NULL;
4232
4233 if (super_class_index == 0) {
4234 check_property(_class_name == vmSymbols::java_lang_Object(),
4235 "Invalid superclass index 0 in class file %s",
4236 CHECK_NULL);
4237 } else {
4238 check_property(valid_klass_reference_at(super_class_index),
4239 "Invalid superclass index %u in class file %s",
4240 super_class_index,
4241 CHECK_NULL);
4242 // The class name should be legal because it is checked when parsing constant pool.
4243 // However, make sure it is not an array type.
4244 bool is_array = false;
4245 if (cp->tag_at(super_class_index).is_klass()) {
4246 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
4247 if (need_verify)
4248 is_array = super_klass->is_array_klass();
4249 } else if (need_verify) {
4250 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
4251 }
4252 if (need_verify) {
4253 guarantee_property(!is_array,
4254 "Bad superclass name in class file %s", CHECK_NULL);
4255 }
4256 }
4257 return super_klass;
4258 }
4259
4260 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
4261 _max_nonstatic_oop_maps = max_blocks;
4262 _nonstatic_oop_map_count = 0;
4263 if (max_blocks == 0) {
4264 _nonstatic_oop_maps = NULL;
4265 } else {
4266 _nonstatic_oop_maps =
4267 NEW_RESOURCE_ARRAY(OopMapBlock, _max_nonstatic_oop_maps);
4268 memset(_nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
4269 }
4270 }
4271
4272 OopMapBlock* OopMapBlocksBuilder::last_oop_map() const {
4273 assert(_nonstatic_oop_map_count > 0, "Has no oop maps");
4274 return _nonstatic_oop_maps + (_nonstatic_oop_map_count - 1);
4275 }
4276
4277 // addition of super oop maps
4278 void OopMapBlocksBuilder::initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
4279 assert(nof_blocks && _nonstatic_oop_map_count == 0 &&
4280 nof_blocks <= _max_nonstatic_oop_maps, "invariant");
4281
4282 memcpy(_nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
4283 _nonstatic_oop_map_count += nof_blocks;
4284 }
4285
4286 // collection of oops
4287 void OopMapBlocksBuilder::add(int offset, int count) {
4288 if (_nonstatic_oop_map_count == 0) {
4289 _nonstatic_oop_map_count++;
4290 }
4291 OopMapBlock* nonstatic_oop_map = last_oop_map();
4292 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
4293 nonstatic_oop_map->set_offset(offset);
4294 nonstatic_oop_map->set_count(count);
4295 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
4296 nonstatic_oop_map->increment_count(count);
4297 } else { // Need a new one...
4298 _nonstatic_oop_map_count++;
4299 assert(_nonstatic_oop_map_count <= _max_nonstatic_oop_maps, "range check");
4300 nonstatic_oop_map = last_oop_map();
4301 nonstatic_oop_map->set_offset(offset);
4302 nonstatic_oop_map->set_count(count);
4303 }
4304 }
4305
4306 // general purpose copy, e.g. into allocated instanceKlass
4307 void OopMapBlocksBuilder::copy(OopMapBlock* dst) {
4308 if (_nonstatic_oop_map_count != 0) {
4309 memcpy(dst, _nonstatic_oop_maps, sizeof(OopMapBlock) * _nonstatic_oop_map_count);
4310 }
4311 }
4312
4313 // Sort and compact adjacent blocks
4314 void OopMapBlocksBuilder::compact() {
4315 if (_nonstatic_oop_map_count <= 1) {
4316 return;
4317 }
4318 /*
4319 * Since field layout sneeks in oops before values, we will be able to condense
4320 * blocks. There is potential to compact between super, own refs and values
4321 * containing refs.
4322 *
4323 * Currently compaction is slightly limited due to values being 8 byte aligned.
4324 * This may well change: FixMe if it doesn't, the code below is fairly general purpose
4325 * and maybe it doesn't need to be.
4326 */
4327 qsort(_nonstatic_oop_maps, _nonstatic_oop_map_count, sizeof(OopMapBlock),
4328 (_sort_Fn)OopMapBlock::compare_offset);
4329 if (_nonstatic_oop_map_count < 2) {
4330 return;
4331 }
4332
4333 // Make a temp copy, and iterate through and copy back into the original
4334 ResourceMark rm;
4335 OopMapBlock* oop_maps_copy =
4336 NEW_RESOURCE_ARRAY(OopMapBlock, _nonstatic_oop_map_count);
4337 OopMapBlock* oop_maps_copy_end = oop_maps_copy + _nonstatic_oop_map_count;
4338 copy(oop_maps_copy);
4339 OopMapBlock* nonstatic_oop_map = _nonstatic_oop_maps;
4340 unsigned int new_count = 1;
4341 oop_maps_copy++;
4342 while(oop_maps_copy < oop_maps_copy_end) {
4343 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
4344 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
4345 nonstatic_oop_map->increment_count(oop_maps_copy->count());
4346 } else {
4347 nonstatic_oop_map++;
4348 new_count++;
4349 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
4350 nonstatic_oop_map->set_count(oop_maps_copy->count());
4351 }
4352 oop_maps_copy++;
4353 }
4354 assert(new_count <= _nonstatic_oop_map_count, "end up with more maps after compact() ?");
4355 _nonstatic_oop_map_count = new_count;
4356 }
4357
4358 void OopMapBlocksBuilder::print_on(outputStream* st) const {
4359 st->print_cr(" OopMapBlocks: %3d /%3d", _nonstatic_oop_map_count, _max_nonstatic_oop_maps);
4360 if (_nonstatic_oop_map_count > 0) {
4361 OopMapBlock* map = _nonstatic_oop_maps;
4362 OopMapBlock* last_map = last_oop_map();
4363 assert(map <= last_map, "Last less than first");
4364 while (map <= last_map) {
4365 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
4366 map->offset() + map->offset_span() - heapOopSize, map->count());
4367 map++;
4368 }
4369 }
4370 }
4371
4372 void OopMapBlocksBuilder::print_value_on(outputStream* st) const {
4373 print_on(st);
4374 }
4375
4376 void ClassFileParser::throwInlineTypeLimitation(THREAD_AND_LOCATION_DECL,
4377 const char* msg,
4378 const Symbol* name,
4379 const Symbol* sig) const {
4380
4381 ResourceMark rm(THREAD);
4382 if (name == NULL || sig == NULL) {
4383 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4384 vmSymbols::java_lang_ClassFormatError(),
4385 "class: %s - %s", _class_name->as_C_string(), msg);
4386 }
4387 else {
4388 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4389 vmSymbols::java_lang_ClassFormatError(),
4390 "\"%s\" sig: \"%s\" class: %s - %s", name->as_C_string(), sig->as_C_string(),
4391 _class_name->as_C_string(), msg);
4392 }
4393 }
4394
4395 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4396 assert(ik != NULL, "invariant");
4397
4398 const Klass* const super = ik->super();
4399
4400 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4401 // in which case we don't have to register objects as finalizable
4402 if (!_has_empty_finalizer) {
4403 if (_has_finalizer ||
4404 (super != NULL && super->has_finalizer())) {
4405 ik->set_has_finalizer();
4406 }
4407 }
4408
4409 #ifdef ASSERT
4410 bool f = false;
4411 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4412 vmSymbols::void_method_signature());
4413 if (InstanceKlass::is_finalization_enabled() &&
4414 (m != NULL) && !m->is_empty_method()) {
4415 f = true;
4416 }
4417
4418 // Spec doesn't prevent agent from redefinition of empty finalizer.
4419 // Despite the fact that it's generally bad idea and redefined finalizer
4420 // will not work as expected we shouldn't abort vm in this case
4421 if (!ik->has_redefined_this_or_super()) {
4422 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4423 }
4424 #endif
4425
4426 // Check if this klass supports the java.lang.Cloneable interface
4427 if (vmClasses::Cloneable_klass_loaded()) {
4428 if (ik->is_subtype_of(vmClasses::Cloneable_klass())) {
4429 if (ik->is_inline_klass()) {
4430 JavaThread *THREAD = JavaThread::current();
4431 throwInlineTypeLimitation(THREAD_AND_LOCATION, "Inline Types do not support Cloneable");
4432 return;
4433 }
4434 ik->set_is_cloneable();
4435 }
4436 }
4437
4438 // Check if this klass has a vanilla default constructor
4439 if (super == NULL) {
4440 // java.lang.Object has empty default constructor
4441 ik->set_has_vanilla_constructor();
4442 } else {
4443 if (super->has_vanilla_constructor() &&
4444 _has_vanilla_constructor) {
4445 ik->set_has_vanilla_constructor();
4446 }
4447 #ifdef ASSERT
4448 bool v = false;
4449 if (super->has_vanilla_constructor()) {
4450 const Method* const constructor =
4451 ik->find_method(vmSymbols::object_initializer_name(),
4452 vmSymbols::void_method_signature());
4453 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4454 v = true;
4455 }
4456 }
4457 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4458 #endif
4459 }
4460
4461 // If it cannot be fast-path allocated, set a bit in the layout helper.
4462 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4463 assert(ik->size_helper() > 0, "layout_helper is initialized");
4464 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4465 || ik->is_abstract() || ik->is_interface()
4466 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4467 || ik->size_helper() >= FastAllocateSizeLimit) {
4468 // Forbid fast-path allocation.
4469 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4470 ik->set_layout_helper(lh);
4471 }
4472 }
4473
4474 bool ClassFileParser::supports_inline_types() const {
4475 // Inline types are only supported by class file version 55 and later
4476 return _major_version >= JAVA_11_VERSION;
4477 }
4478
4479 // utility methods for appending an array with check for duplicates
4480
4481 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4482 const Array<InstanceKlass*>* const ifs) {
4483 // iterate over new interfaces
4484 for (int i = 0; i < ifs->length(); i++) {
4485 InstanceKlass* const e = ifs->at(i);
4486 assert(e->is_klass() && e->is_interface(), "just checking");
4487 // add new interface
4488 result->append_if_missing(e);
4489 }
4490 }
4491
4492 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4493 Array<InstanceKlass*>* local_ifs,
4494 ClassLoaderData* loader_data,
4495 TRAPS) {
4496 assert(local_ifs != NULL, "invariant");
4497 assert(loader_data != NULL, "invariant");
4498
4499 // Compute maximum size for transitive interfaces
4500 int max_transitive_size = 0;
4501 int super_size = 0;
4502 // Add superclass transitive interfaces size
4503 if (super != NULL) {
4504 super_size = super->transitive_interfaces()->length();
4505 max_transitive_size += super_size;
4506 }
4507 // Add local interfaces' super interfaces
4508 const int local_size = local_ifs->length();
4509 for (int i = 0; i < local_size; i++) {
4510 InstanceKlass* const l = local_ifs->at(i);
4511 max_transitive_size += l->transitive_interfaces()->length();
4512 }
4513 // Finally add local interfaces
4514 max_transitive_size += local_size;
4515 // Construct array
4516 if (max_transitive_size == 0) {
4517 // no interfaces, use canonicalized array
4518 return Universe::the_empty_instance_klass_array();
4519 } else if (max_transitive_size == super_size) {
4520 // no new local interfaces added, share superklass' transitive interface array
4521 return super->transitive_interfaces();
4522 // The three lines below are commented to work around bug JDK-8245487
4523 // } else if (max_transitive_size == local_size) {
4524 // // only local interfaces added, share local interface array
4525 // return local_ifs;
4526 } else {
4527 ResourceMark rm;
4528 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4529
4530 // Copy down from superclass
4531 if (super != NULL) {
4532 append_interfaces(result, super->transitive_interfaces());
4533 }
4534
4535 // Copy down from local interfaces' superinterfaces
4536 for (int i = 0; i < local_size; i++) {
4537 InstanceKlass* const l = local_ifs->at(i);
4538 append_interfaces(result, l->transitive_interfaces());
4539 }
4540 // Finally add local interfaces
4541 append_interfaces(result, local_ifs);
4542
4543 // length will be less than the max_transitive_size if duplicates were removed
4544 const int length = result->length();
4545 assert(length <= max_transitive_size, "just checking");
4546
4547 Array<InstanceKlass*>* const new_result =
4548 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4549 for (int i = 0; i < length; i++) {
4550 InstanceKlass* const e = result->at(i);
4551 assert(e != NULL, "just checking");
4552 new_result->at_put(i, e);
4553 }
4554 return new_result;
4555 }
4556 }
4557
4558 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4559 assert(this_klass != NULL, "invariant");
4560 const Klass* const super = this_klass->super();
4561
4562 if (super != NULL) {
4563 const InstanceKlass* super_ik = InstanceKlass::cast(super);
4564
4565 if (super->is_final()) {
4566 classfile_icce_error("class %s cannot inherit from final class %s", super_ik, THREAD);
4567 return;
4568 }
4569
4570 if (super_ik->is_sealed() && !super_ik->has_as_permitted_subclass(this_klass)) {
4571 classfile_icce_error("class %s cannot inherit from sealed class %s", super_ik, THREAD);
4572 return;
4573 }
4574
4575 // The JVMS says that super classes for value types must have the ACC_PERMITS_VALUE
4576 // flag set. However, since java.lang.Object has not yet been changed into an abstract
4577 // class, it cannot have its ACC_PERMITS_VALUE flag set. But, java.lang.Object must
4578 // still be allowed to be a direct super class for a value classes. So, it is treated
4579 // as a special case for now.
4580 if (this_klass->access_flags().is_value_class() &&
4581 super_ik->name() != vmSymbols::java_lang_Object() &&
4582 super_ik->is_identity_class()) {
4583 classfile_icce_error("value class %s cannot inherit from class %s", super_ik, THREAD);
4584 return;
4585 }
4586
4587 // If the loader is not the boot loader then throw an exception if its
4588 // superclass is in package jdk.internal.reflect and its loader is not a
4589 // special reflection class loader
4590 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4591 PackageEntry* super_package = super->package();
4592 if (super_package != NULL &&
4593 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4594 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4595 ResourceMark rm(THREAD);
4596 Exceptions::fthrow(
4597 THREAD_AND_LOCATION,
4598 vmSymbols::java_lang_IllegalAccessError(),
4599 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4600 this_klass->external_name(),
4601 this_klass->class_loader_data()->loader_name_and_id(),
4602 super->external_name());
4603 return;
4604 }
4605 }
4606
4607 Reflection::VerifyClassAccessResults vca_result =
4608 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4609 if (vca_result != Reflection::ACCESS_OK) {
4610 ResourceMark rm(THREAD);
4611 char* msg = Reflection::verify_class_access_msg(this_klass,
4612 InstanceKlass::cast(super),
4613 vca_result);
4614 if (msg == NULL) {
4615 bool same_module = (this_klass->module() == super->module());
4616 Exceptions::fthrow(
4617 THREAD_AND_LOCATION,
4618 vmSymbols::java_lang_IllegalAccessError(),
4619 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4620 this_klass->external_name(),
4621 super->is_abstract() ? "abstract " : "",
4622 super->external_name(),
4623 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4624 (same_module) ? "" : "; ",
4625 (same_module) ? "" : super->class_in_module_of_loader());
4626 } else {
4627 // Add additional message content.
4628 Exceptions::fthrow(
4629 THREAD_AND_LOCATION,
4630 vmSymbols::java_lang_IllegalAccessError(),
4631 "superclass access check failed: %s",
4632 msg);
4633 }
4634 }
4635 }
4636 }
4637
4638
4639 void ClassFileParser::check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4640 assert(this_klass != NULL, "invariant");
4641 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4642 const int lng = local_interfaces->length();
4643 for (int i = lng - 1; i >= 0; i--) {
4644 InstanceKlass* const k = local_interfaces->at(i);
4645 assert (k != NULL && k->is_interface(), "invalid interface");
4646
4647 if (k->is_sealed() && !k->has_as_permitted_subclass(this_klass)) {
4648 classfile_icce_error(this_klass->is_interface() ?
4649 "class %s cannot extend sealed interface %s" :
4650 "class %s cannot implement sealed interface %s",
4651 k, THREAD);
4652 return;
4653 }
4654
4655 Reflection::VerifyClassAccessResults vca_result =
4656 Reflection::verify_class_access(this_klass, k, false);
4657 if (vca_result != Reflection::ACCESS_OK) {
4658 ResourceMark rm(THREAD);
4659 char* msg = Reflection::verify_class_access_msg(this_klass,
4660 k,
4661 vca_result);
4662 if (msg == NULL) {
4663 bool same_module = (this_klass->module() == k->module());
4664 Exceptions::fthrow(
4665 THREAD_AND_LOCATION,
4666 vmSymbols::java_lang_IllegalAccessError(),
4667 "class %s cannot access its superinterface %s (%s%s%s)",
4668 this_klass->external_name(),
4669 k->external_name(),
4670 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4671 (same_module) ? "" : "; ",
4672 (same_module) ? "" : k->class_in_module_of_loader());
4673 } else {
4674 // Add additional message content.
4675 Exceptions::fthrow(
4676 THREAD_AND_LOCATION,
4677 vmSymbols::java_lang_IllegalAccessError(),
4678 "superinterface check failed: %s",
4679 msg);
4680 }
4681 }
4682 }
4683 }
4684
4685
4686 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4687 assert(this_klass != NULL, "invariant");
4688 const Array<Method*>* const methods = this_klass->methods();
4689 const int num_methods = methods->length();
4690
4691 // go thru each method and check if it overrides a final method
4692 for (int index = 0; index < num_methods; index++) {
4693 const Method* const m = methods->at(index);
4694
4695 // skip private, static, and <init> methods
4696 if ((!m->is_private() && !m->is_static()) &&
4697 (m->name() != vmSymbols::object_initializer_name())) {
4698
4699 const Symbol* const name = m->name();
4700 const Symbol* const signature = m->signature();
4701 const Klass* k = this_klass->super();
4702 const Method* super_m = NULL;
4703 while (k != NULL) {
4704 // skip supers that don't have final methods.
4705 if (k->has_final_method()) {
4706 // lookup a matching method in the super class hierarchy
4707 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4708 if (super_m == NULL) {
4709 break; // didn't find any match; get out
4710 }
4711
4712 if (super_m->is_final() && !super_m->is_static() &&
4713 !super_m->access_flags().is_private()) {
4714 // matching method in super is final, and not static or private
4715 bool can_access = Reflection::verify_member_access(this_klass,
4716 super_m->method_holder(),
4717 super_m->method_holder(),
4718 super_m->access_flags(),
4719 false, false, CHECK);
4720 if (can_access) {
4721 // this class can access super final method and therefore override
4722 ResourceMark rm(THREAD);
4723 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
4724 err_msg("class %s overrides final method %s.%s%s",
4725 this_klass->external_name(),
4726 super_m->method_holder()->external_name(),
4727 name->as_C_string(),
4728 signature->as_C_string()));
4729 }
4730 }
4731
4732 // continue to look from super_m's holder's super.
4733 k = super_m->method_holder()->super();
4734 continue;
4735 }
4736
4737 k = k->super();
4738 }
4739 }
4740 }
4741 }
4742
4743
4744 // assumes that this_klass is an interface
4745 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4746 assert(this_klass != NULL, "invariant");
4747 assert(this_klass->is_interface(), "not an interface");
4748 const Array<Method*>* methods = this_klass->methods();
4749 const int num_methods = methods->length();
4750
4751 for (int index = 0; index < num_methods; index++) {
4752 const Method* const m = methods->at(index);
4753 // if m is static and not the init method, throw a verify error
4754 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4755 ResourceMark rm(THREAD);
4756 Exceptions::fthrow(
4757 THREAD_AND_LOCATION,
4758 vmSymbols::java_lang_VerifyError(),
4759 "Illegal static method %s in interface %s",
4760 m->name()->as_C_string(),
4761 this_klass->external_name()
4762 );
4763 return;
4764 }
4765 }
4766 }
4767
4768 // utility methods for format checking
4769
4770 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4771 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4772 const bool is_value_class = (flags & JVM_ACC_VALUE) != 0;
4773 const bool is_primitive_class = (flags & JVM_ACC_PRIMITIVE) != 0;
4774 const bool is_permits_value_class = (flags & JVM_ACC_PERMITS_VALUE) != 0;
4775 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4776 assert(supports_inline_types() || !is_value_class, "JVM_ACC_VALUE should not be set");
4777 assert(supports_inline_types() || !is_primitive_class, "JVM_ACC_PRIMITIVE should not be set");
4778 assert(supports_inline_types() || !is_permits_value_class, "JVM_ACC_PERMITS_VALUE should not be set");
4779 if (is_module) {
4780 ResourceMark rm(THREAD);
4781 Exceptions::fthrow(
4782 THREAD_AND_LOCATION,
4783 vmSymbols::java_lang_NoClassDefFoundError(),
4784 "%s is not a class because access_flag ACC_MODULE is set",
4785 _class_name->as_C_string());
4786 return;
4787 }
4788
4789 if (!EnableValhalla) {
4790 if (is_value_class || is_primitive_class) {
4791 const char* bad_flag = is_primitive_class ? "ACC_PRIMITIVE" : "ACC_VALUE";
4792 ResourceMark rm(THREAD);
4793 Exceptions::fthrow(
4794 THREAD_AND_LOCATION,
4795 vmSymbols::java_lang_ClassFormatError(),
4796 "Class modifier %s in class %s requires option -XX:+EnableValhalla",
4797 bad_flag, _class_name->as_C_string()
4798 );
4799 }
4800 return;
4801 }
4802
4803 if (!_need_verify) { return; }
4804
4805 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4806 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4807 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4808 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4809 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4810 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4811 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4812
4813 if ((is_abstract && is_final) ||
4814 (is_interface && !is_abstract) ||
4815 (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4816 (!is_interface && major_gte_1_5 && is_annotation) ||
4817 (is_value_class && (is_enum || is_permits_value_class)) ||
4818 (is_permits_value_class && (is_interface || is_final || !is_abstract)) ||
4819 (is_primitive_class && (!is_value_class || !is_final || is_interface || is_abstract))) {
4820 ResourceMark rm(THREAD);
4821 const char* class_note = "";
4822 if (is_value_class) class_note = " (a value class)";
4823 if (is_primitive_class) class_note = " (a primitive class)";
4824 if (is_permits_value_class) class_note = " (a permits_value class)";
4825 Exceptions::fthrow(
4826 THREAD_AND_LOCATION,
4827 vmSymbols::java_lang_ClassFormatError(),
4828 "Illegal class modifiers in class %s%s: 0x%X",
4829 _class_name->as_C_string(), class_note, flags
4830 );
4831 return;
4832 }
4833 }
4834
4835 static bool has_illegal_visibility(jint flags) {
4836 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4837 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4838 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4839
4840 return ((is_public && is_protected) ||
4841 (is_public && is_private) ||
4842 (is_protected && is_private));
4843 }
4844
4845 // A legal major_version.minor_version must be one of the following:
4846 //
4847 // Major_version >= 45 and major_version < 56, any minor_version.
4848 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4849 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4850 //
4851 void ClassFileParser::verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4852 ResourceMark rm(THREAD);
4853 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4854 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4855 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid major version",
4856 class_name, major, minor, THREAD);
4857 return;
4858 }
4859
4860 if (major > max_version) {
4861 Exceptions::fthrow(
4862 THREAD_AND_LOCATION,
4863 vmSymbols::java_lang_UnsupportedClassVersionError(),
4864 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4865 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4866 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4867 return;
4868 }
4869
4870 if (major < JAVA_12_VERSION || minor == 0) {
4871 return;
4872 }
4873
4874 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4875 if (major != max_version) {
4876 Exceptions::fthrow(
4877 THREAD_AND_LOCATION,
4878 vmSymbols::java_lang_UnsupportedClassVersionError(),
4879 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4880 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4881 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4882 return;
4883 }
4884
4885 if (!Arguments::enable_preview()) {
4886 classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4887 class_name, major, minor, THREAD);
4888 return;
4889 }
4890
4891 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4892 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4893 class_name, major, minor, THREAD);
4894 }
4895 }
4896
4897 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4898 bool is_interface,
4899 bool is_inline_type,
4900 bool is_permits_value_class,
4901 TRAPS) const {
4902 if (!_need_verify) { return; }
4903
4904 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4905 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4906 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4907 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4908 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4909 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4910 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4911 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4912 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4913
4914 bool is_illegal = false;
4915
4916 if (is_interface) {
4917 if (!is_public || !is_static || !is_final || is_private ||
4918 is_protected || is_volatile || is_transient ||
4919 (major_gte_1_5 && is_enum)) {
4920 is_illegal = true;
4921 }
4922 } else { // not interface
4923 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4924 is_illegal = true;
4925 } else {
4926 if (is_inline_type && !is_static && !is_final) {
4927 is_illegal = true;
4928 } else if (is_permits_value_class && !is_static) {
4929 is_illegal = true;
4930 }
4931 }
4932 }
4933
4934 if (is_illegal) {
4935 ResourceMark rm(THREAD);
4936 Exceptions::fthrow(
4937 THREAD_AND_LOCATION,
4938 vmSymbols::java_lang_ClassFormatError(),
4939 "Illegal field modifiers in class %s: 0x%X",
4940 _class_name->as_C_string(), flags);
4941 return;
4942 }
4943 }
4944
4945 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4946 bool is_interface,
4947 bool is_inline_type,
4948 bool is_abstract_type,
4949 const Symbol* name,
4950 TRAPS) const {
4951 if (!_need_verify) { return; }
4952
4953 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4954 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4955 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4956 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4957 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4958 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4959 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4960 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4961 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4962 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4963 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4964 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4965 const bool major_gte_17 = _major_version >= JAVA_17_VERSION;
4966 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4967
4968 bool is_illegal = false;
4969
4970 const char* class_note = "";
4971 if (is_interface) {
4972 if (major_gte_8) {
4973 // Class file version is JAVA_8_VERSION or later Methods of
4974 // interfaces may set any of the flags except ACC_PROTECTED,
4975 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4976 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4977 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4978 (is_native || is_protected || is_final || is_synchronized) ||
4979 // If a specific method of a class or interface has its
4980 // ACC_ABSTRACT flag set, it must not have any of its
4981 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4982 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4983 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4984 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4985 (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
4986 is_illegal = true;
4987 }
4988 } else if (major_gte_1_5) {
4989 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4990 if (!is_public || is_private || is_protected || is_static || is_final ||
4991 is_synchronized || is_native || !is_abstract || is_strict) {
4992 is_illegal = true;
4993 }
4994 } else {
4995 // Class file version is pre-JAVA_1_5_VERSION
4996 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4997 is_illegal = true;
4998 }
4999 }
5000 } else { // not interface
5001 if (has_illegal_visibility(flags)) {
5002 is_illegal = true;
5003 } else {
5004 if (is_initializer) {
5005 if (is_final || is_synchronized || is_native ||
5006 is_abstract || (major_gte_1_5 && is_bridge)) {
5007 is_illegal = true;
5008 }
5009 if (!is_static && (!is_inline_type || is_abstract_type)) {
5010 // OK, an object constructor in a regular class or an abstract value class
5011 } else if (is_static && is_inline_type) {
5012 // OK, a static init factory in an inline class
5013 } else {
5014 // but no other combinations are allowed
5015 is_illegal = true;
5016 class_note = (is_inline_type ? " (an inline class)" : " (not an inline class)");
5017 }
5018 } else { // not initializer
5019 if (is_inline_type && is_synchronized && !is_static) {
5020 is_illegal = true;
5021 class_note = " (an inline class)";
5022 } else {
5023 if (is_abstract) {
5024 if ((is_final || is_native || is_private || is_static ||
5025 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
5026 is_illegal = true;
5027 }
5028 }
5029 }
5030 }
5031 }
5032 }
5033
5034 if (is_illegal) {
5035 ResourceMark rm(THREAD);
5036 Exceptions::fthrow(
5037 THREAD_AND_LOCATION,
5038 vmSymbols::java_lang_ClassFormatError(),
5039 "Method %s in class %s%s has illegal modifiers: 0x%X",
5040 name->as_C_string(), _class_name->as_C_string(), class_note, flags);
5041 return;
5042 }
5043 }
5044
5045 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
5046 int length,
5047 TRAPS) const {
5048 assert(_need_verify, "only called when _need_verify is true");
5049 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
5050 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
5051 }
5052 }
5053
5054 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5055 // In class names, '/' separates unqualified names. This is verified in this function also.
5056 // Method names also may not contain the characters '<' or '>', unless <init>
5057 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5058 // method. Because these names have been checked as special cases before
5059 // calling this method in verify_legal_method_name.
5060 //
5061 // This method is also called from the modular system APIs in modules.cpp
5062 // to verify the validity of module and package names.
5063 bool ClassFileParser::verify_unqualified_name(const char* name,
5064 unsigned int length,
5065 int type) {
5066 if (length == 0) return false; // Must have at least one char.
5067 for (const char* p = name; p != name + length; p++) {
5068 switch(*p) {
5069 case JVM_SIGNATURE_DOT:
5070 case JVM_SIGNATURE_ENDCLASS:
5071 case JVM_SIGNATURE_ARRAY:
5072 // do not permit '.', ';', or '['
5073 return false;
5074 case JVM_SIGNATURE_SLASH:
5075 // check for '//' or leading or trailing '/' which are not legal
5076 // unqualified name must not be empty
5077 if (type == ClassFileParser::LegalClass) {
5078 if (p == name || p+1 >= name+length ||
5079 *(p+1) == JVM_SIGNATURE_SLASH) {
5080 return false;
5081 }
5082 } else {
5083 return false; // do not permit '/' unless it's class name
5084 }
5085 break;
5086 case JVM_SIGNATURE_SPECIAL:
5087 case JVM_SIGNATURE_ENDSPECIAL:
5088 // do not permit '<' or '>' in method names
5089 if (type == ClassFileParser::LegalMethod) {
5090 return false;
5091 }
5092 }
5093 }
5094 return true;
5095 }
5096
5097 // Take pointer to a UTF8 byte string (not NUL-terminated).
5098 // Skip over the longest part of the string that could
5099 // be taken as a fieldname. Allow non-trailing '/'s if slash_ok is true.
5100 // Return a pointer to just past the fieldname.
5101 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5102 // being true, we saw consecutive slashes (meaning we were looking for a
5103 // qualified path but found something that was badly-formed).
5104 static const char* skip_over_field_name(const char* const name,
5105 bool slash_ok,
5106 unsigned int length) {
5107 const char* p;
5108 jboolean last_is_slash = false;
5109 jboolean not_first_ch = false;
5110
5111 for (p = name; p != name + length; not_first_ch = true) {
5112 const char* old_p = p;
5113 jchar ch = *p;
5114 if (ch < 128) {
5115 p++;
5116 // quick check for ascii
5117 if ((ch >= 'a' && ch <= 'z') ||
5118 (ch >= 'A' && ch <= 'Z') ||
5119 (ch == '_' || ch == '$') ||
5120 (not_first_ch && ch >= '0' && ch <= '9')) {
5121 last_is_slash = false;
5122 continue;
5123 }
5124 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
5125 if (last_is_slash) {
5126 return NULL; // Don't permit consecutive slashes
5127 }
5128 last_is_slash = true;
5129 continue;
5130 }
5131 }
5132 else {
5133 jint unicode_ch;
5134 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5135 p = tmp_p;
5136 last_is_slash = false;
5137 // Check if ch is Java identifier start or is Java identifier part
5138 // 4672820: call java.lang.Character methods directly without generating separate tables.
5139 EXCEPTION_MARK;
5140 // return value
5141 JavaValue result(T_BOOLEAN);
5142 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5143 JavaCallArguments args;
5144 args.push_int(unicode_ch);
5145
5146 if (not_first_ch) {
5147 // public static boolean isJavaIdentifierPart(char ch);
5148 JavaCalls::call_static(&result,
5149 vmClasses::Character_klass(),
5150 vmSymbols::isJavaIdentifierPart_name(),
5151 vmSymbols::int_bool_signature(),
5152 &args,
5153 THREAD);
5154 } else {
5155 // public static boolean isJavaIdentifierStart(char ch);
5156 JavaCalls::call_static(&result,
5157 vmClasses::Character_klass(),
5158 vmSymbols::isJavaIdentifierStart_name(),
5159 vmSymbols::int_bool_signature(),
5160 &args,
5161 THREAD);
5162 }
5163 if (HAS_PENDING_EXCEPTION) {
5164 CLEAR_PENDING_EXCEPTION;
5165 return NULL;
5166 }
5167 if(result.get_jboolean()) {
5168 continue;
5169 }
5170 }
5171 return (not_first_ch) ? old_p : NULL;
5172 }
5173 return (not_first_ch && !last_is_slash) ? p : NULL;
5174 }
5175
5176 // Take pointer to a UTF8 byte string (not NUL-terminated).
5177 // Skip over the longest part of the string that could
5178 // be taken as a field signature. Allow "void" if void_ok.
5179 // Return a pointer to just past the signature.
5180 // Return NULL if no legal signature is found.
5181 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5182 bool void_ok,
5183 unsigned int length,
5184 TRAPS) const {
5185 unsigned int array_dim = 0;
5186 while (length > 0) {
5187 switch (signature[0]) {
5188 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5189 case JVM_SIGNATURE_BOOLEAN:
5190 case JVM_SIGNATURE_BYTE:
5191 case JVM_SIGNATURE_CHAR:
5192 case JVM_SIGNATURE_SHORT:
5193 case JVM_SIGNATURE_INT:
5194 case JVM_SIGNATURE_FLOAT:
5195 case JVM_SIGNATURE_LONG:
5196 case JVM_SIGNATURE_DOUBLE:
5197 return signature + 1;
5198 case JVM_SIGNATURE_PRIMITIVE_OBJECT:
5199 // Can't enable this check fully until JDK upgrades the bytecode generators.
5200 // For now, compare to class file version 51 so old verifier doesn't see Q signatures.
5201 if (_major_version < 51 /* CONSTANT_CLASS_DESCRIPTORS */ ) {
5202 classfile_parse_error("Class name contains illegal Q-signature "
5203 "in descriptor in class file %s",
5204 CHECK_0);
5205 return NULL;
5206 }
5207 // fall through
5208 case JVM_SIGNATURE_CLASS:
5209 {
5210 if (_major_version < JAVA_1_5_VERSION) {
5211 // Skip over the class name if one is there
5212 const char* const p = skip_over_field_name(signature + 1, true, --length);
5213
5214 // The next character better be a semicolon
5215 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
5216 return p + 1;
5217 }
5218 }
5219 else {
5220 // Skip leading 'L' or 'Q' and ignore first appearance of ';'
5221 signature++;
5222 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
5223 // Format check signature
5224 if (c != NULL) {
5225 int newlen = c - (char*) signature;
5226 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5227 if (!legal) {
5228 classfile_parse_error("Class name is empty or contains illegal character "
5229 "in descriptor in class file %s",
5230 THREAD);
5231 return NULL;
5232 }
5233 return signature + newlen + 1;
5234 }
5235 }
5236 return NULL;
5237 }
5238 case JVM_SIGNATURE_ARRAY:
5239 array_dim++;
5240 if (array_dim > 255) {
5241 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5242 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", THREAD);
5243 return NULL;
5244 }
5245 // The rest of what's there better be a legal signature
5246 signature++;
5247 length--;
5248 void_ok = false;
5249 break;
5250 default:
5251 return NULL;
5252 }
5253 }
5254 return NULL;
5255 }
5256
5257 // Checks if name is a legal class name.
5258 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5259 if (!_need_verify || _relax_verify) { return; }
5260
5261 assert(name->refcount() > 0, "symbol must be kept alive");
5262 char* bytes = (char*)name->bytes();
5263 unsigned int length = name->utf8_length();
5264 bool legal = false;
5265
5266 if (length > 0) {
5267 const char* p;
5268 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5269 p = skip_over_field_signature(bytes, false, length, CHECK);
5270 legal = (p != NULL) && ((p - bytes) == (int)length);
5271 } else if (_major_version < JAVA_1_5_VERSION) {
5272 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5273 p = skip_over_field_name(bytes, true, length);
5274 legal = (p != NULL) && ((p - bytes) == (int)length);
5275 }
5276 } else if ((_major_version >= CONSTANT_CLASS_DESCRIPTORS || _class_name->starts_with("jdk/internal/reflect/"))
5277 && bytes[length - 1] == ';' ) {
5278 // Support for L...; and Q...; descriptors
5279 legal = verify_unqualified_name(bytes + 1, length - 2, LegalClass);
5280 } else {
5281 // 4900761: relax the constraints based on JSR202 spec
5282 // Class names may be drawn from the entire Unicode character set.
5283 // Identifiers between '/' must be unqualified names.
5284 // The utf8 string has been verified when parsing cpool entries.
5285 legal = verify_unqualified_name(bytes, length, LegalClass);
5286 }
5287 }
5288 if (!legal) {
5289 ResourceMark rm(THREAD);
5290 assert(_class_name != NULL, "invariant");
5291 Exceptions::fthrow(
5292 THREAD_AND_LOCATION,
5293 vmSymbols::java_lang_ClassFormatError(),
5294 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5295 _class_name->as_C_string()
5296 );
5297 return;
5298 }
5299 }
5300
5301 // Checks if name is a legal field name.
5302 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5303 if (!_need_verify || _relax_verify) { return; }
5304
5305 char* bytes = (char*)name->bytes();
5306 unsigned int length = name->utf8_length();
5307 bool legal = false;
5308
5309 if (length > 0) {
5310 if (_major_version < JAVA_1_5_VERSION) {
5311 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5312 const char* p = skip_over_field_name(bytes, false, length);
5313 legal = (p != NULL) && ((p - bytes) == (int)length);
5314 }
5315 } else {
5316 // 4881221: relax the constraints based on JSR202 spec
5317 legal = verify_unqualified_name(bytes, length, LegalField);
5318 }
5319 }
5320
5321 if (!legal) {
5322 ResourceMark rm(THREAD);
5323 assert(_class_name != NULL, "invariant");
5324 Exceptions::fthrow(
5325 THREAD_AND_LOCATION,
5326 vmSymbols::java_lang_ClassFormatError(),
5327 "Illegal field name \"%.*s\" in class %s", length, bytes,
5328 _class_name->as_C_string()
5329 );
5330 return;
5331 }
5332 }
5333
5334 // Checks if name is a legal method name.
5335 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5336 if (!_need_verify || _relax_verify) { return; }
5337
5338 assert(name != NULL, "method name is null");
5339 char* bytes = (char*)name->bytes();
5340 unsigned int length = name->utf8_length();
5341 bool legal = false;
5342
5343 if (length > 0) {
5344 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
5345 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5346 legal = true;
5347 }
5348 } else if (_major_version < JAVA_1_5_VERSION) {
5349 const char* p;
5350 p = skip_over_field_name(bytes, false, length);
5351 legal = (p != NULL) && ((p - bytes) == (int)length);
5352 } else {
5353 // 4881221: relax the constraints based on JSR202 spec
5354 legal = verify_unqualified_name(bytes, length, LegalMethod);
5355 }
5356 }
5357
5358 if (!legal) {
5359 ResourceMark rm(THREAD);
5360 assert(_class_name != NULL, "invariant");
5361 Exceptions::fthrow(
5362 THREAD_AND_LOCATION,
5363 vmSymbols::java_lang_ClassFormatError(),
5364 "Illegal method name \"%.*s\" in class %s", length, bytes,
5365 _class_name->as_C_string()
5366 );
5367 return;
5368 }
5369 }
5370
5371
5372 // Checks if signature is a legal field signature.
5373 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5374 const Symbol* signature,
5375 TRAPS) const {
5376 if (!_need_verify) { return; }
5377 if (!supports_inline_types() && (signature->is_Q_signature() || signature->is_Q_array_signature())) {
5378 throwIllegalSignature("Field", name, signature, CHECK);
5379 }
5380
5381 const char* const bytes = (const char* const)signature->bytes();
5382 const unsigned int length = signature->utf8_length();
5383 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5384
5385 if (p == NULL || (p - bytes) != (int)length) {
5386 throwIllegalSignature("Field", name, signature, CHECK);
5387 }
5388 }
5389
5390 // Check that the signature is compatible with the method name. For example,
5391 // check that <init> has a void signature.
5392 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
5393 const Symbol* signature,
5394 TRAPS) const {
5395 if (!_need_verify) {
5396 return;
5397 }
5398
5399 // Class initializers cannot have args for class format version >= 51.
5400 if (name == vmSymbols::class_initializer_name() &&
5401 signature != vmSymbols::void_method_signature() &&
5402 _major_version >= JAVA_7_VERSION) {
5403 throwIllegalSignature("Method", name, signature, THREAD);
5404 return;
5405 }
5406
5407 if (!is_inline_type()) {
5408 int sig_length = signature->utf8_length();
5409 if (name->utf8_length() > 0 &&
5410 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
5411 sig_length > 0 &&
5412 signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
5413 throwIllegalSignature("Method", name, signature, THREAD);
5414 }
5415 }
5416 }
5417
5418 // Checks if signature is a legal method signature.
5419 // Returns number of parameters
5420 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5421 const Symbol* signature,
5422 TRAPS) const {
5423 if (!_need_verify) {
5424 // make sure caller's args_size will be less than 0 even for non-static
5425 // method so it will be recomputed in compute_size_of_parameters().
5426 return -2;
5427 }
5428
5429 unsigned int args_size = 0;
5430 const char* p = (const char*)signature->bytes();
5431 unsigned int length = signature->utf8_length();
5432 const char* nextp;
5433
5434 // The first character must be a '('
5435 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5436 length--;
5437 // Skip over legal field signatures
5438 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5439 while ((length > 0) && (nextp != NULL)) {
5440 args_size++;
5441 if (p[0] == 'J' || p[0] == 'D') {
5442 args_size++;
5443 }
5444 length -= nextp - p;
5445 p = nextp;
5446 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5447 }
5448 // The first non-signature thing better be a ')'
5449 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5450 length--;
5451 // Now we better just have a return value
5452 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5453 if (nextp && ((int)length == (nextp - p))) {
5454 return args_size;
5455 }
5456 }
5457 }
5458 // Report error
5459 throwIllegalSignature("Method", name, signature, THREAD);
5460 return 0;
5461 }
5462
5463 int ClassFileParser::static_field_size() const {
5464 assert(_field_info != NULL, "invariant");
5465 return _field_info->_static_field_size;
5466 }
5467
5468 int ClassFileParser::total_oop_map_count() const {
5469 assert(_field_info != NULL, "invariant");
5470 return _field_info->oop_map_blocks->_nonstatic_oop_map_count;
5471 }
5472
5473 jint ClassFileParser::layout_size() const {
5474 assert(_field_info != NULL, "invariant");
5475 return _field_info->_instance_size;
5476 }
5477
5478 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5479 const Array<Method*>* methods) {
5480 assert(ik != NULL, "invariant");
5481 assert(methods != NULL, "invariant");
5482
5483 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5484 // (We used to do this lazily, but now we query it in Rewriter,
5485 // which is eagerly done for every method, so we might as well do it now,
5486 // when everything is fresh in memory.)
5487 const vmSymbolID klass_id = Method::klass_id_for_intrinsics(ik);
5488
5489 if (klass_id != vmSymbolID::NO_SID) {
5490 for (int j = 0; j < methods->length(); ++j) {
5491 Method* method = methods->at(j);
5492 method->init_intrinsic_id(klass_id);
5493
5494 if (CheckIntrinsics) {
5495 // Check if an intrinsic is defined for method 'method',
5496 // but the method is not annotated with @IntrinsicCandidate.
5497 if (method->intrinsic_id() != vmIntrinsics::_none &&
5498 !method->intrinsic_candidate()) {
5499 tty->print("Compiler intrinsic is defined for method [%s], "
5500 "but the method is not annotated with @IntrinsicCandidate.%s",
5501 method->name_and_sig_as_C_string(),
5502 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5503 );
5504 tty->cr();
5505 DEBUG_ONLY(vm_exit(1));
5506 }
5507 // Check is the method 'method' is annotated with @IntrinsicCandidate,
5508 // but there is no intrinsic available for it.
5509 if (method->intrinsic_candidate() &&
5510 method->intrinsic_id() == vmIntrinsics::_none) {
5511 tty->print("Method [%s] is annotated with @IntrinsicCandidate, "
5512 "but no compiler intrinsic is defined for the method.%s",
5513 method->name_and_sig_as_C_string(),
5514 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5515 );
5516 tty->cr();
5517 DEBUG_ONLY(vm_exit(1));
5518 }
5519 }
5520 } // end for
5521
5522 #ifdef ASSERT
5523 if (CheckIntrinsics) {
5524 // Check for orphan methods in the current class. A method m
5525 // of a class C is orphan if an intrinsic is defined for method m,
5526 // but class C does not declare m.
5527 // The check is potentially expensive, therefore it is available
5528 // only in debug builds.
5529
5530 for (auto id : EnumRange<vmIntrinsicID>{}) {
5531 if (vmIntrinsics::_compiledLambdaForm == id) {
5532 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5533 // generated for the JVM from a LambdaForm and therefore no method
5534 // is defined for it.
5535 continue;
5536 }
5537 if (vmIntrinsics::_blackhole == id) {
5538 // The _blackhole intrinsic is a special marker. No explicit method
5539 // is defined for it.
5540 continue;
5541 }
5542
5543 if (vmIntrinsics::class_for(id) == klass_id) {
5544 // Check if the current class contains a method with the same
5545 // name, flags, signature.
5546 bool match = false;
5547 for (int j = 0; j < methods->length(); ++j) {
5548 const Method* method = methods->at(j);
5549 if (method->intrinsic_id() == id) {
5550 match = true;
5551 break;
5552 }
5553 }
5554
5555 if (!match) {
5556 char buf[1000];
5557 tty->print("Compiler intrinsic is defined for method [%s], "
5558 "but the method is not available in class [%s].%s",
5559 vmIntrinsics::short_name_as_C_string(id, buf, sizeof(buf)),
5560 ik->name()->as_C_string(),
5561 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5562 );
5563 tty->cr();
5564 DEBUG_ONLY(vm_exit(1));
5565 }
5566 }
5567 } // end for
5568 } // CheckIntrinsics
5569 #endif // ASSERT
5570 }
5571 }
5572
5573 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
5574 const ClassInstanceInfo& cl_inst_info,
5575 TRAPS) {
5576 if (_klass != NULL) {
5577 return _klass;
5578 }
5579
5580 InstanceKlass* const ik =
5581 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5582
5583 if (is_hidden()) {
5584 mangle_hidden_class_name(ik);
5585 }
5586
5587 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5588
5589 assert(_klass == ik, "invariant");
5590 return ik;
5591 }
5592
5593 // Return true if the specified class is not a valid super class for an inline type.
5594 // A valid super class for an inline type is abstract, has no instance fields,
5595 // is not declared with the identity modifier (checked elsewhere), has
5596 // an empty body-less no-arg constructor, and no synchronized instance methods.
5597 // This function doesn't check if the class's super types are invalid. Those checks
5598 // are done elsewhere. The final determination of whether or not a class is an
5599 // invalid super type for an inline class is done in fill_instance_klass().
5600 bool ClassFileParser::is_invalid_super_for_inline_type() {
5601 if (is_interface() || class_name() == vmSymbols::java_lang_Object()) {
5602 return false;
5603 }
5604 if (!access_flags().is_abstract() || _has_nonstatic_fields) {
5605 return true;
5606 } else {
5607 // Look at each method
5608 for (int x = 0; x < _methods->length(); x++) {
5609 const Method* const method = _methods->at(x);
5610 if (method->is_synchronized() && !method->is_static()) {
5611 return true;
5612
5613 } else if (method->name() == vmSymbols::object_initializer_name()) {
5614 if (method->signature() != vmSymbols::void_method_signature() ||
5615 !method->is_vanilla_constructor()) {
5616 return true;
5617 }
5618 }
5619 }
5620 }
5621 return false;
5622 }
5623
5624 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5625 bool changed_by_loadhook,
5626 const ClassInstanceInfo& cl_inst_info,
5627 TRAPS) {
5628 assert(ik != NULL, "invariant");
5629
5630 // Set name and CLD before adding to CLD
5631 ik->set_class_loader_data(_loader_data);
5632 ik->set_name(_class_name);
5633
5634 // Add all classes to our internal class loader list here,
5635 // including classes in the bootstrap (NULL) class loader.
5636 const bool publicize = !is_internal();
5637
5638 _loader_data->add_class(ik, publicize);
5639
5640 set_klass_to_deallocate(ik);
5641
5642 assert(_field_info != NULL, "invariant");
5643 assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5644 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5645 "sanity");
5646
5647 assert(ik->is_instance_klass(), "sanity");
5648 assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5649
5650 // Fill in information already parsed
5651 ik->set_should_verify_class(_need_verify);
5652
5653 // Not yet: supers are done below to support the new subtype-checking fields
5654 ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5655 ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
5656 if (_field_info->_is_naturally_atomic && ik->is_inline_klass()) {
5657 ik->set_is_naturally_atomic();
5658 }
5659
5660 if (this->_invalid_inline_super) {
5661 ik->set_invalid_inline_super();
5662 }
5663
5664 assert(_fac != NULL, "invariant");
5665 ik->set_static_oop_field_count(_fac->count[STATIC_OOP] + _fac->count[STATIC_INLINE]);
5666
5667 // this transfers ownership of a lot of arrays from
5668 // the parser onto the InstanceKlass*
5669 apply_parsed_class_metadata(ik, _java_fields_count);
5670
5671 // can only set dynamic nest-host after static nest information is set
5672 if (cl_inst_info.dynamic_nest_host() != NULL) {
5673 ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5674 }
5675
5676 // note that is not safe to use the fields in the parser from this point on
5677 assert(NULL == _cp, "invariant");
5678 assert(NULL == _fields, "invariant");
5679 assert(NULL == _methods, "invariant");
5680 assert(NULL == _inner_classes, "invariant");
5681 assert(NULL == _nest_members, "invariant");
5682 assert(NULL == _preload_classes, "invariant");
5683 assert(NULL == _combined_annotations, "invariant");
5684 assert(NULL == _record_components, "invariant");
5685 assert(NULL == _permitted_subclasses, "invariant");
5686
5687 if (_has_final_method) {
5688 ik->set_has_final_method();
5689 }
5690
5691 ik->copy_method_ordering(_method_ordering, CHECK);
5692 // The InstanceKlass::_methods_jmethod_ids cache
5693 // is managed on the assumption that the initial cache
5694 // size is equal to the number of methods in the class. If
5695 // that changes, then InstanceKlass::idnum_can_increment()
5696 // has to be changed accordingly.
5697 ik->set_initial_method_idnum(ik->methods()->length());
5698
5699 ik->set_this_class_index(_this_class_index);
5700
5701 if (_is_hidden) {
5702 // _this_class_index is a CONSTANT_Class entry that refers to this
5703 // hidden class itself. If this class needs to refer to its own methods
5704 // or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5705 // _this_class_index. However, because this class is hidden (it's
5706 // not stored in SystemDictionary), _this_class_index cannot be resolved
5707 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5708 // Therefore, we must eagerly resolve _this_class_index now.
5709 ik->constants()->klass_at_put(_this_class_index, ik);
5710 }
5711
5712 ik->set_minor_version(_minor_version);
5713 ik->set_major_version(_major_version);
5714 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5715 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5716 if (_is_declared_atomic) {
5717 ik->set_is_declared_atomic();
5718 }
5719
5720 if (_is_hidden) {
5721 ik->set_is_hidden();
5722 }
5723
5724 // Set PackageEntry for this_klass
5725 oop cl = ik->class_loader();
5726 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5727 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5728 ik->set_package(cld, NULL, CHECK);
5729
5730 const Array<Method*>* const methods = ik->methods();
5731 assert(methods != NULL, "invariant");
5732 const int methods_len = methods->length();
5733
5734 check_methods_for_intrinsics(ik, methods);
5735
5736 // Fill in field values obtained by parse_classfile_attributes
5737 if (_parsed_annotations->has_any_annotations()) {
5738 _parsed_annotations->apply_to(ik);
5739 }
5740
5741 apply_parsed_class_attributes(ik);
5742
5743 // Miranda methods
5744 if ((_num_miranda_methods > 0) ||
5745 // if this class introduced new miranda methods or
5746 (_super_klass != NULL && _super_klass->has_miranda_methods())
5747 // super class exists and this class inherited miranda methods
5748 ) {
5749 ik->set_has_miranda_methods(); // then set a flag
5750 }
5751
5752 // Fill in information needed to compute superclasses.
5753 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5754 ik->set_transitive_interfaces(_transitive_interfaces);
5755 ik->set_local_interfaces(_local_interfaces);
5756 _transitive_interfaces = NULL;
5757 _local_interfaces = NULL;
5758
5759 // Initialize itable offset tables
5760 klassItable::setup_itable_offset_table(ik);
5761
5762 // Compute transitive closure of interfaces this class implements
5763 // Do final class setup
5764 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5765 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5766 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5767 }
5768
5769 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5770 ( _super_klass != NULL && _super_klass->has_contended_annotations())) {
5771 ik->set_has_contended_annotations(true);
5772 }
5773
5774 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5775 set_precomputed_flags(ik);
5776
5777 // check if this class can access its super class
5778 check_super_class_access(ik, CHECK);
5779
5780 // check if this class can access its superinterfaces
5781 check_super_interface_access(ik, CHECK);
5782
5783 // check if this class overrides any final method
5784 check_final_method_override(ik, CHECK);
5785
5786 // reject static interface methods prior to Java 8
5787 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5788 check_illegal_static_method(ik, CHECK);
5789 }
5790
5791 // Obtain this_klass' module entry
5792 ModuleEntry* module_entry = ik->module();
5793 assert(module_entry != NULL, "module_entry should always be set");
5794
5795 // Obtain java.lang.Module
5796 Handle module_handle(THREAD, module_entry->module());
5797
5798 // Allocate mirror and initialize static fields
5799 // The create_mirror() call will also call compute_modifiers()
5800 java_lang_Class::create_mirror(ik,
5801 Handle(THREAD, _loader_data->class_loader()),
5802 module_handle,
5803 _protection_domain,
5804 cl_inst_info.class_data(),
5805 CHECK);
5806
5807 assert(_all_mirandas != NULL, "invariant");
5808
5809 // Generate any default methods - default methods are public interface methods
5810 // that have a default implementation. This is new with Java 8.
5811 if (_has_nonstatic_concrete_methods) {
5812 DefaultMethods::generate_default_methods(ik,
5813 _all_mirandas,
5814 CHECK);
5815 }
5816
5817 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5818 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5819 !module_entry->has_default_read_edges()) {
5820 if (!module_entry->set_has_default_read_edges()) {
5821 // We won a potential race
5822 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5823 }
5824 }
5825
5826 bool all_fields_empty = true;
5827 for (AllFieldStream fs(ik->fields(), ik->constants()); !fs.done(); fs.next()) {
5828 if (!fs.access_flags().is_static()) {
5829 if (fs.field_descriptor().is_inline_type()) {
5830 Klass* k = _inline_type_field_klasses->at(fs.index());
5831 ik->set_inline_type_field_klass(fs.index(), k);
5832 if (!InlineKlass::cast(k)->is_empty_inline_type()) { all_fields_empty = false; }
5833 } else {
5834 all_fields_empty = false;
5835 }
5836 } else if (is_inline_type() && (fs.name() == vmSymbols::default_value_name())) {
5837 InlineKlass::cast(ik)->set_default_value_offset(ik->field_offset(fs.index()));
5838 }
5839 }
5840
5841 if (_is_empty_inline_type || (is_inline_type() && all_fields_empty)) {
5842 ik->set_is_empty_inline_type();
5843 }
5844
5845 if (is_inline_type()) {
5846 InlineKlass* vk = InlineKlass::cast(ik);
5847 vk->set_alignment(_alignment);
5848 vk->set_first_field_offset(_first_field_offset);
5849 vk->set_exact_size_in_bytes(_exact_size_in_bytes);
5850 InlineKlass::cast(ik)->initialize_calling_convention(CHECK);
5851 }
5852
5853 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5854
5855 if (!is_internal()) {
5856 ik->print_class_load_logging(_loader_data, module_entry, _stream);
5857
5858 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5859 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5860 log_is_enabled(Info, class, preview)) {
5861 ResourceMark rm;
5862 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5863 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5864 }
5865
5866 if (log_is_enabled(Debug, class, resolve)) {
5867 ResourceMark rm;
5868 // print out the superclass.
5869 const char * from = ik->external_name();
5870 if (ik->java_super() != NULL) {
5871 log_debug(class, resolve)("%s %s (super)",
5872 from,
5873 ik->java_super()->external_name());
5874 }
5875 // print out each of the interface classes referred to by this class.
5876 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5877 if (local_interfaces != NULL) {
5878 const int length = local_interfaces->length();
5879 for (int i = 0; i < length; i++) {
5880 const InstanceKlass* const k = local_interfaces->at(i);
5881 const char * to = k->external_name();
5882 log_debug(class, resolve)("%s %s (interface)", from, to);
5883 }
5884 }
5885 }
5886 }
5887
5888 JFR_ONLY(INIT_ID(ik);)
5889
5890 // If we reach here, all is well.
5891 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5892 // in order for it to not be destroyed in the ClassFileParser destructor.
5893 set_klass_to_deallocate(NULL);
5894
5895 // it's official
5896 set_klass(ik);
5897
5898 debug_only(ik->verify();)
5899 }
5900
5901 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5902 // Decrement the refcount in the old name, since we're clobbering it.
5903 _class_name->decrement_refcount();
5904
5905 _class_name = new_class_name;
5906 // Increment the refcount of the new name.
5907 // Now the ClassFileParser owns this name and will decrement in
5908 // the destructor.
5909 _class_name->increment_refcount();
5910 }
5911
5912 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5913 bool trusted = loader_data->is_boot_class_loader_data() ||
5914 loader_data->is_platform_class_loader_data();
5915 bool need_verify =
5916 // verifyAll
5917 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5918 // verifyRemote
5919 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5920 return !need_verify;
5921 }
5922
5923 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5924 Symbol* name,
5925 ClassLoaderData* loader_data,
5926 const ClassLoadInfo* cl_info,
5927 Publicity pub_level,
5928 TRAPS) :
5929 _stream(stream),
5930 _class_name(NULL),
5931 _loader_data(loader_data),
5932 _is_hidden(cl_info->is_hidden()),
5933 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5934 _orig_cp_size(0),
5935 _super_klass(),
5936 _cp(NULL),
5937 _fields(NULL),
5938 _methods(NULL),
5939 _inner_classes(NULL),
5940 _nest_members(NULL),
5941 _nest_host(0),
5942 _permitted_subclasses(NULL),
5943 _preload_classes(NULL),
5944 _record_components(NULL),
5945 _temp_local_interfaces(NULL),
5946 _local_interfaces(NULL),
5947 _transitive_interfaces(NULL),
5948 _combined_annotations(NULL),
5949 _class_annotations(NULL),
5950 _class_type_annotations(NULL),
5951 _fields_annotations(NULL),
5952 _fields_type_annotations(NULL),
5953 _klass(NULL),
5954 _klass_to_deallocate(NULL),
5955 _parsed_annotations(NULL),
5956 _fac(NULL),
5957 _field_info(NULL),
5958 _inline_type_field_klasses(NULL),
5959 _method_ordering(NULL),
5960 _all_mirandas(NULL),
5961 _vtable_size(0),
5962 _itable_size(0),
5963 _num_miranda_methods(0),
5964 _rt(REF_NONE),
5965 _protection_domain(cl_info->protection_domain()),
5966 _access_flags(),
5967 _pub_level(pub_level),
5968 _bad_constant_seen(0),
5969 _synthetic_flag(false),
5970 _sde_length(false),
5971 _sde_buffer(NULL),
5972 _sourcefile_index(0),
5973 _generic_signature_index(0),
5974 _major_version(0),
5975 _minor_version(0),
5976 _this_class_index(0),
5977 _super_class_index(0),
5978 _itfs_len(0),
5979 _java_fields_count(0),
5980 _need_verify(false),
5981 _relax_verify(false),
5982 _has_nonstatic_concrete_methods(false),
5983 _declares_nonstatic_concrete_methods(false),
5984 _has_final_method(false),
5985 _has_contended_fields(false),
5986 _has_inline_type_fields(false),
5987 _has_nonstatic_fields(false),
5988 _is_empty_inline_type(false),
5989 _is_naturally_atomic(false),
5990 _is_declared_atomic(false),
5991 _invalid_inline_super(false),
5992 _invalid_identity_super(false),
5993 _has_finalizer(false),
5994 _has_empty_finalizer(false),
5995 _has_vanilla_constructor(false),
5996 _max_bootstrap_specifier_index(-1) {
5997
5998 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5999 _class_name->increment_refcount();
6000
6001 assert(_loader_data != NULL, "invariant");
6002 assert(stream != NULL, "invariant");
6003 assert(_stream != NULL, "invariant");
6004 assert(_stream->buffer() == _stream->current(), "invariant");
6005 assert(_class_name != NULL, "invariant");
6006 assert(0 == _access_flags.as_int(), "invariant");
6007
6008 // Figure out whether we can skip format checking (matching classic VM behavior)
6009 if (DumpSharedSpaces) {
6010 // verify == true means it's a 'remote' class (i.e., non-boot class)
6011 // Verification decision is based on BytecodeVerificationRemote flag
6012 // for those classes.
6013 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
6014 BytecodeVerificationLocal;
6015 }
6016 else {
6017 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
6018 stream->need_verify());
6019 }
6020
6021 // synch back verification state to stream
6022 stream->set_verify(_need_verify);
6023
6024 // Check if verification needs to be relaxed for this class file
6025 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
6026 _relax_verify = relax_format_check_for(_loader_data);
6027
6028 parse_stream(stream, CHECK);
6029
6030 post_process_parsed_stream(stream, _cp, CHECK);
6031 }
6032
6033 void ClassFileParser::clear_class_metadata() {
6034 // metadata created before the instance klass is created. Must be
6035 // deallocated if classfile parsing returns an error.
6036 _cp = NULL;
6037 _fields = NULL;
6038 _methods = NULL;
6039 _inner_classes = NULL;
6040 _nest_members = NULL;
6041 _permitted_subclasses = NULL;
6042 _preload_classes = NULL;
6043 _combined_annotations = NULL;
6044 _class_annotations = _class_type_annotations = NULL;
6045 _fields_annotations = _fields_type_annotations = NULL;
6046 _record_components = NULL;
6047 }
6048
6049 // Destructor to clean up
6050 ClassFileParser::~ClassFileParser() {
6051 _class_name->decrement_refcount();
6052
6053 if (_cp != NULL) {
6054 MetadataFactory::free_metadata(_loader_data, _cp);
6055 }
6056 if (_fields != NULL) {
6057 MetadataFactory::free_array<u2>(_loader_data, _fields);
6058 }
6059
6060 if (_inline_type_field_klasses != NULL) {
6061 MetadataFactory::free_array<InlineKlass*>(_loader_data, _inline_type_field_klasses);
6062 }
6063
6064 if (_methods != NULL) {
6065 // Free methods
6066 InstanceKlass::deallocate_methods(_loader_data, _methods);
6067 }
6068
6069 // beware of the Universe::empty_blah_array!!
6070 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
6071 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
6072 }
6073
6074 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
6075 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
6076 }
6077
6078 if (_record_components != NULL) {
6079 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
6080 }
6081
6082 if (_permitted_subclasses != NULL && _permitted_subclasses != Universe::the_empty_short_array()) {
6083 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
6084 }
6085
6086 if (_preload_classes != NULL && _preload_classes != Universe::the_empty_short_array()) {
6087 MetadataFactory::free_array<u2>(_loader_data, _preload_classes);
6088 }
6089
6090 // Free interfaces
6091 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
6092 _local_interfaces, _transitive_interfaces);
6093
6094 if (_combined_annotations != NULL) {
6095 // After all annotations arrays have been created, they are installed into the
6096 // Annotations object that will be assigned to the InstanceKlass being created.
6097
6098 // Deallocate the Annotations object and the installed annotations arrays.
6099 _combined_annotations->deallocate_contents(_loader_data);
6100
6101 // If the _combined_annotations pointer is non-NULL,
6102 // then the other annotations fields should have been cleared.
6103 assert(_class_annotations == NULL, "Should have been cleared");
6104 assert(_class_type_annotations == NULL, "Should have been cleared");
6105 assert(_fields_annotations == NULL, "Should have been cleared");
6106 assert(_fields_type_annotations == NULL, "Should have been cleared");
6107 } else {
6108 // If the annotations arrays were not installed into the Annotations object,
6109 // then they have to be deallocated explicitly.
6110 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
6111 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
6112 Annotations::free_contents(_loader_data, _fields_annotations);
6113 Annotations::free_contents(_loader_data, _fields_type_annotations);
6114 }
6115
6116 clear_class_metadata();
6117 _transitive_interfaces = NULL;
6118 _local_interfaces = NULL;
6119
6120 // deallocate the klass if already created. Don't directly deallocate, but add
6121 // to the deallocate list so that the klass is removed from the CLD::_klasses list
6122 // at a safepoint.
6123 if (_klass_to_deallocate != NULL) {
6124 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6125 }
6126 }
6127
6128 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6129 TRAPS) {
6130
6131 assert(stream != NULL, "invariant");
6132 assert(_class_name != NULL, "invariant");
6133
6134 // BEGIN STREAM PARSING
6135 stream->guarantee_more(8, CHECK); // magic, major, minor
6136 // Magic value
6137 const u4 magic = stream->get_u4_fast();
6138 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6139 "Incompatible magic value %u in class file %s",
6140 magic, CHECK);
6141
6142 // Version numbers
6143 _minor_version = stream->get_u2_fast();
6144 _major_version = stream->get_u2_fast();
6145
6146 // Check version numbers - we check this even with verifier off
6147 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
6148
6149 stream->guarantee_more(3, CHECK); // length, first cp tag
6150 u2 cp_size = stream->get_u2_fast();
6151
6152 guarantee_property(
6153 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6154 cp_size, CHECK);
6155
6156 _orig_cp_size = cp_size;
6157 if (is_hidden()) { // Add a slot for hidden class name.
6158 cp_size++;
6159 }
6160
6161 _cp = ConstantPool::allocate(_loader_data,
6162 cp_size,
6163 CHECK);
6164
6165 ConstantPool* const cp = _cp;
6166
6167 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6168
6169 assert(cp_size == (const u2)cp->length(), "invariant");
6170
6171 // ACCESS FLAGS
6172 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6173
6174 jint recognized_modifiers = JVM_RECOGNIZED_CLASS_MODIFIERS;
6175 // JVM_ACC_MODULE is defined in JDK-9 and later.
6176 if (_major_version >= JAVA_9_VERSION) {
6177 recognized_modifiers |= JVM_ACC_MODULE;
6178 }
6179 // JVM_ACC_VALUE and JVM_ACC_PRIMITIVE are defined for class file version 55 and later
6180 if (supports_inline_types()) {
6181 recognized_modifiers |= JVM_ACC_PRIMITIVE | JVM_ACC_VALUE;
6182 }
6183
6184 // Access flags
6185 jint flags = stream->get_u2_fast() & recognized_modifiers;
6186
6187 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6188 // Set abstract bit for old class files for backward compatibility
6189 flags |= JVM_ACC_ABSTRACT;
6190 }
6191
6192 verify_legal_class_modifiers(flags, CHECK);
6193
6194 short bad_constant = class_bad_constant_seen();
6195 if (bad_constant != 0) {
6196 // Do not throw CFE until after the access_flags are checked because if
6197 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6198 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
6199 return;
6200 }
6201
6202 _access_flags.set_flags(flags);
6203
6204 // This class and superclass
6205 _this_class_index = stream->get_u2_fast();
6206 check_property(
6207 valid_cp_range(_this_class_index, cp_size) &&
6208 cp->tag_at(_this_class_index).is_unresolved_klass(),
6209 "Invalid this class index %u in constant pool in class file %s",
6210 _this_class_index, CHECK);
6211
6212 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6213 assert(class_name_in_cp != NULL, "class_name can't be null");
6214
6215 // Don't need to check whether this class name is legal or not.
6216 // It has been checked when constant pool is parsed.
6217 // However, make sure it is not an array type.
6218 if (_need_verify) {
6219 guarantee_property(class_name_in_cp->char_at(0) != JVM_SIGNATURE_ARRAY,
6220 "Bad class name in class file %s",
6221 CHECK);
6222 }
6223
6224 #ifdef ASSERT
6225 // Basic sanity checks
6226 if (_is_hidden) {
6227 assert(_class_name != vmSymbols::unknown_class_name(), "hidden classes should have a special name");
6228 }
6229 #endif
6230
6231 // Update the _class_name as needed depending on whether this is a named, un-named, or hidden class.
6232
6233 if (_is_hidden) {
6234 assert(_class_name != NULL, "Unexpected null _class_name");
6235 #ifdef ASSERT
6236 if (_need_verify) {
6237 verify_legal_class_name(_class_name, CHECK);
6238 }
6239 #endif
6240
6241 } else {
6242 // Check if name in class file matches given name
6243 if (_class_name != class_name_in_cp) {
6244 if (_class_name != vmSymbols::unknown_class_name()) {
6245 ResourceMark rm(THREAD);
6246 Exceptions::fthrow(THREAD_AND_LOCATION,
6247 vmSymbols::java_lang_NoClassDefFoundError(),
6248 "%s (wrong name: %s)",
6249 class_name_in_cp->as_C_string(),
6250 _class_name->as_C_string()
6251 );
6252 return;
6253 } else {
6254 // The class name was not known by the caller so we set it from
6255 // the value in the CP.
6256 update_class_name(class_name_in_cp);
6257 }
6258 // else nothing to do: the expected class name matches what is in the CP
6259 }
6260 }
6261
6262 // Verification prevents us from creating names with dots in them, this
6263 // asserts that that's the case.
6264 assert(is_internal_format(_class_name), "external class name format used internally");
6265
6266 if (!is_internal()) {
6267 LogTarget(Debug, class, preorder) lt;
6268 if (lt.is_enabled()){
6269 ResourceMark rm(THREAD);
6270 LogStream ls(lt);
6271 ls.print("%s", _class_name->as_klass_external_name());
6272 if (stream->source() != NULL) {
6273 ls.print(" source: %s", stream->source());
6274 }
6275 ls.cr();
6276 }
6277 }
6278
6279 // SUPERKLASS
6280 _super_class_index = stream->get_u2_fast();
6281 _super_klass = parse_super_class(cp,
6282 _super_class_index,
6283 _need_verify,
6284 CHECK);
6285
6286 // Interfaces
6287 _itfs_len = stream->get_u2_fast();
6288 parse_interfaces(stream,
6289 _itfs_len,
6290 cp,
6291 &_has_nonstatic_concrete_methods,
6292 &_is_declared_atomic,
6293 CHECK);
6294
6295 assert(_temp_local_interfaces != NULL, "invariant");
6296
6297 // Fields (offsets are filled in later)
6298 _fac = new FieldAllocationCount();
6299 parse_fields(stream,
6300 is_interface(),
6301 is_inline_type(),
6302 is_permits_value_class(),
6303 _fac,
6304 cp,
6305 cp_size,
6306 &_java_fields_count,
6307 CHECK);
6308
6309 assert(_fields != NULL, "invariant");
6310
6311 // Methods
6312 AccessFlags promoted_flags;
6313 parse_methods(stream,
6314 is_interface(),
6315 is_inline_type(),
6316 is_abstract_type(),
6317 &promoted_flags,
6318 &_has_final_method,
6319 &_declares_nonstatic_concrete_methods,
6320 CHECK);
6321
6322 assert(_methods != NULL, "invariant");
6323
6324 // promote flags from parse_methods() to the klass' flags
6325 _access_flags.add_promoted_flags(promoted_flags.as_int());
6326
6327 if (_declares_nonstatic_concrete_methods) {
6328 _has_nonstatic_concrete_methods = true;
6329 }
6330
6331 // Additional attributes/annotations
6332 _parsed_annotations = new ClassAnnotationCollector();
6333 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6334
6335 assert(_inner_classes != NULL, "invariant");
6336
6337 // Finalize the Annotations metadata object,
6338 // now that all annotation arrays have been created.
6339 create_combined_annotations(CHECK);
6340
6341 // Make sure this is the end of class file stream
6342 guarantee_property(stream->at_eos(),
6343 "Extra bytes at the end of class file %s",
6344 CHECK);
6345
6346 // all bytes in stream read and parsed
6347 }
6348
6349 void ClassFileParser::mangle_hidden_class_name(InstanceKlass* const ik) {
6350 ResourceMark rm;
6351 // Construct hidden name from _class_name, "+", and &ik. Note that we can't
6352 // use a '/' because that confuses finding the class's package. Also, can't
6353 // use an illegal char such as ';' because that causes serialization issues
6354 // and issues with hidden classes that create their own hidden classes.
6355 char addr_buf[20];
6356 if (DumpSharedSpaces) {
6357 // We want stable names for the archived hidden classes (only for static
6358 // archive for now). Spaces under default_SharedBaseAddress() will be
6359 // occupied by the archive at run time, so we know that no dynamically
6360 // loaded InstanceKlass will be placed under there.
6361 static volatile size_t counter = 0;
6362 Atomic::cmpxchg(&counter, (size_t)0, Arguments::default_SharedBaseAddress()); // initialize it
6363 size_t new_id = Atomic::add(&counter, (size_t)1);
6364 jio_snprintf(addr_buf, 20, SIZE_FORMAT_HEX, new_id);
6365 } else {
6366 jio_snprintf(addr_buf, 20, INTPTR_FORMAT, p2i(ik));
6367 }
6368 size_t new_name_len = _class_name->utf8_length() + 2 + strlen(addr_buf);
6369 char* new_name = NEW_RESOURCE_ARRAY(char, new_name_len);
6370 jio_snprintf(new_name, new_name_len, "%s+%s",
6371 _class_name->as_C_string(), addr_buf);
6372 update_class_name(SymbolTable::new_symbol(new_name));
6373
6374 // Add a Utf8 entry containing the hidden name.
6375 assert(_class_name != NULL, "Unexpected null _class_name");
6376 int hidden_index = _orig_cp_size; // this is an extra slot we added
6377 _cp->symbol_at_put(hidden_index, _class_name);
6378
6379 // Update this_class_index's slot in the constant pool with the new Utf8 entry.
6380 // We have to update the resolved_klass_index and the name_index together
6381 // so extract the existing resolved_klass_index first.
6382 CPKlassSlot cp_klass_slot = _cp->klass_slot_at(_this_class_index);
6383 int resolved_klass_index = cp_klass_slot.resolved_klass_index();
6384 _cp->unresolved_klass_at_put(_this_class_index, hidden_index, resolved_klass_index);
6385 assert(_cp->klass_slot_at(_this_class_index).name_index() == _orig_cp_size,
6386 "Bad name_index");
6387 }
6388
6389 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6390 ConstantPool* cp,
6391 TRAPS) {
6392 assert(stream != NULL, "invariant");
6393 assert(stream->at_eos(), "invariant");
6394 assert(cp != NULL, "invariant");
6395 assert(_loader_data != NULL, "invariant");
6396
6397 if (_class_name == vmSymbols::java_lang_Object()) {
6398 check_property(_temp_local_interfaces->length() == 0,
6399 "java.lang.Object cannot implement an interface in class file %s",
6400 CHECK);
6401 }
6402 // We check super class after class file is parsed and format is checked
6403 if (_super_class_index > 0 && NULL == _super_klass) {
6404 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6405 if (is_interface()) {
6406 // Before attempting to resolve the superclass, check for class format
6407 // errors not checked yet.
6408 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6409 "Interfaces must have java.lang.Object as superclass in class file %s",
6410 CHECK);
6411 }
6412 Handle loader(THREAD, _loader_data->class_loader());
6413 _super_klass = (const InstanceKlass*)
6414 SystemDictionary::resolve_super_or_fail(_class_name,
6415 super_class_name,
6416 loader,
6417 _protection_domain,
6418 true,
6419 CHECK);
6420 }
6421
6422 if (_super_klass != NULL) {
6423 if (_super_klass->has_nonstatic_concrete_methods()) {
6424 _has_nonstatic_concrete_methods = true;
6425 }
6426 if (_super_klass->is_declared_atomic()) {
6427 _is_declared_atomic = true;
6428 }
6429
6430 if (_super_klass->is_interface()) {
6431 classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
6432 return;
6433 }
6434
6435 // For an inline class, only java/lang/Object or special abstract classes
6436 // are acceptable super classes.
6437 if (is_inline_type()) {
6438 const InstanceKlass* super_ik = _super_klass;
6439 if (super_ik->invalid_inline_super()) {
6440 classfile_icce_error("inline class %s has an invalid super class %s", _super_klass, THREAD);
6441 return;
6442 }
6443 }
6444 }
6445
6446 if (_class_name == vmSymbols::java_lang_NonTearable() && _loader_data->class_loader() == NULL) {
6447 // This is the original source of this condition.
6448 // It propagates by inheritance, as if testing "instanceof NonTearable".
6449 _is_declared_atomic = true;
6450 } else if (*ForceNonTearable != '\0') {
6451 // Allow a command line switch to force the same atomicity property:
6452 const char* class_name_str = _class_name->as_C_string();
6453 if (StringUtils::class_list_match(ForceNonTearable, class_name_str)) {
6454 _is_declared_atomic = true;
6455 }
6456 }
6457
6458 // Set ik->invalid_inline_super field to TRUE if already marked as invalid,
6459 // if super is marked invalid, or if is_invalid_super_for_inline_type()
6460 // returns true
6461 if (invalid_inline_super() ||
6462 (_super_klass != NULL && _super_klass->invalid_inline_super()) ||
6463 is_invalid_super_for_inline_type()) {
6464 set_invalid_inline_super();
6465 }
6466
6467 int itfs_len = _temp_local_interfaces->length();
6468 if (itfs_len == 0) {
6469 _local_interfaces = Universe::the_empty_instance_klass_array();
6470 } else {
6471 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
6472 for (int i = 0; i < itfs_len; i++) {
6473 _local_interfaces->at_put(i, _temp_local_interfaces->at(i));
6474 }
6475 }
6476 _temp_local_interfaces = NULL;
6477 assert(_local_interfaces != NULL, "invariant");
6478
6479 // Compute the transitive list of all unique interfaces implemented by this class
6480 _transitive_interfaces =
6481 compute_transitive_interfaces(_super_klass,
6482 _local_interfaces,
6483 _loader_data,
6484 CHECK);
6485
6486 assert(_transitive_interfaces != NULL, "invariant");
6487
6488 // sort methods
6489 _method_ordering = sort_methods(_methods);
6490
6491 _all_mirandas = new GrowableArray<Method*>(20);
6492
6493 Handle loader(THREAD, _loader_data->class_loader());
6494 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6495 &_num_miranda_methods,
6496 _all_mirandas,
6497 _super_klass,
6498 _methods,
6499 _access_flags,
6500 _major_version,
6501 loader,
6502 _class_name,
6503 _local_interfaces);
6504
6505 // Size of Java itable (in words)
6506 _itable_size = is_interface() ? 0 :
6507 klassItable::compute_itable_size(_transitive_interfaces);
6508
6509 assert(_fac != NULL, "invariant");
6510 assert(_parsed_annotations != NULL, "invariant");
6511
6512
6513 if (EnableValhalla) {
6514 _inline_type_field_klasses = MetadataFactory::new_array<InlineKlass*>(_loader_data,
6515 java_fields_count(),
6516 NULL,
6517 CHECK);
6518 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
6519 if (Signature::basic_type(fs.signature()) == T_PRIMITIVE_OBJECT && !fs.access_flags().is_static()) {
6520 // Pre-load inline class
6521 Klass* klass = SystemDictionary::resolve_inline_type_field_or_fail(&fs,
6522 Handle(THREAD, _loader_data->class_loader()),
6523 _protection_domain, true, CHECK);
6524 assert(klass != NULL, "Sanity check");
6525 if (!klass->access_flags().is_value_class()) {
6526 assert(klass->is_instance_klass(), "Sanity check");
6527 ResourceMark rm(THREAD);
6528 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
6529 err_msg("Class %s expects class %s to be an inline type, but it is not",
6530 _class_name->as_C_string(),
6531 InstanceKlass::cast(klass)->external_name()));
6532 }
6533 _inline_type_field_klasses->at_put(fs.index(), InlineKlass::cast(klass));
6534 }
6535 }
6536 }
6537
6538 _field_info = new FieldLayoutInfo();
6539 FieldLayoutBuilder lb(class_name(), super_klass(), _cp, _fields,
6540 _parsed_annotations->is_contended(), is_inline_type(),
6541 _field_info, _inline_type_field_klasses);
6542 lb.build_layout(CHECK);
6543 if (is_inline_type()) {
6544 _alignment = lb.get_alignment();
6545 _first_field_offset = lb.get_first_field_offset();
6546 _exact_size_in_bytes = lb.get_exact_size_in_byte();
6547 }
6548 _has_inline_type_fields = _field_info->_has_inline_fields;
6549
6550 // Compute reference type
6551 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6552 }
6553
6554 void ClassFileParser::set_klass(InstanceKlass* klass) {
6555
6556 #ifdef ASSERT
6557 if (klass != NULL) {
6558 assert(NULL == _klass, "leaking?");
6559 }
6560 #endif
6561
6562 _klass = klass;
6563 }
6564
6565 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6566
6567 #ifdef ASSERT
6568 if (klass != NULL) {
6569 assert(NULL == _klass_to_deallocate, "leaking?");
6570 }
6571 #endif
6572
6573 _klass_to_deallocate = klass;
6574 }
6575
6576 // Caller responsible for ResourceMark
6577 // clone stream with rewound position
6578 const ClassFileStream* ClassFileParser::clone_stream() const {
6579 assert(_stream != NULL, "invariant");
6580
6581 return _stream->clone();
6582 }
6583
6584 // ----------------------------------------------------------------------------
6585 // debugging
6586
6587 #ifdef ASSERT
6588
6589 // return true if class_name contains no '.' (internal format is '/')
6590 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6591 if (class_name != NULL) {
6592 ResourceMark rm;
6593 char* name = class_name->as_C_string();
6594 return strchr(name, JVM_SIGNATURE_DOT) == NULL;
6595 } else {
6596 return true;
6597 }
6598 }
6599
6600 #endif