1 /*
2 * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/classFileParser.hpp"
28 #include "classfile/classFileStream.hpp"
29 #include "classfile/classLoader.hpp"
30 #include "classfile/classLoaderData.inline.hpp"
31 #include "classfile/classLoadInfo.hpp"
32 #include "classfile/defaultMethods.hpp"
33 #include "classfile/fieldLayoutBuilder.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/moduleEntry.hpp"
36 #include "classfile/packageEntry.hpp"
37 #include "classfile/symbolTable.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/verificationType.hpp"
40 #include "classfile/verifier.hpp"
41 #include "classfile/vmClasses.hpp"
42 #include "classfile/vmSymbols.hpp"
43 #include "logging/log.hpp"
44 #include "logging/logStream.hpp"
45 #include "memory/allocation.hpp"
46 #include "memory/metadataFactory.hpp"
47 #include "memory/oopFactory.hpp"
48 #include "memory/resourceArea.hpp"
49 #include "memory/universe.hpp"
50 #include "oops/annotations.hpp"
51 #include "oops/constantPool.inline.hpp"
52 #include "oops/fieldStreams.inline.hpp"
53 #include "oops/inlineKlass.inline.hpp"
54 #include "oops/instanceKlass.inline.hpp"
55 #include "oops/instanceMirrorKlass.hpp"
56 #include "oops/klass.inline.hpp"
57 #include "oops/klassVtable.hpp"
58 #include "oops/metadata.hpp"
59 #include "oops/method.inline.hpp"
60 #include "oops/oop.inline.hpp"
61 #include "oops/recordComponent.hpp"
62 #include "oops/symbol.hpp"
63 #include "prims/jvmtiExport.hpp"
64 #include "prims/jvmtiThreadState.hpp"
65 #include "runtime/arguments.hpp"
66 #include "runtime/fieldDescriptor.inline.hpp"
67 #include "runtime/handles.inline.hpp"
68 #include "runtime/javaCalls.hpp"
69 #include "runtime/os.hpp"
70 #include "runtime/perfData.hpp"
71 #include "runtime/reflection.hpp"
72 #include "runtime/safepointVerifiers.hpp"
73 #include "runtime/signature.hpp"
74 #include "runtime/timer.hpp"
75 #include "services/classLoadingService.hpp"
76 #include "services/threadService.hpp"
77 #include "utilities/align.hpp"
78 #include "utilities/bitMap.inline.hpp"
79 #include "utilities/copy.hpp"
80 #include "utilities/formatBuffer.hpp"
81 #include "utilities/exceptions.hpp"
82 #include "utilities/globalDefinitions.hpp"
83 #include "utilities/growableArray.hpp"
84 #include "utilities/macros.hpp"
85 #include "utilities/ostream.hpp"
86 #include "utilities/resourceHash.hpp"
87 #include "utilities/stringUtils.hpp"
88 #include "utilities/utf8.hpp"
89
90 #if INCLUDE_CDS
91 #include "classfile/systemDictionaryShared.hpp"
92 #endif
93 #if INCLUDE_JFR
94 #include "jfr/support/jfrTraceIdExtension.hpp"
95 #endif
96
97 // We generally try to create the oops directly when parsing, rather than
98 // allocating temporary data structures and copying the bytes twice. A
99 // temporary area is only needed when parsing utf8 entries in the constant
100 // pool and when parsing line number tables.
101
102 // We add assert in debug mode when class format is not checked.
103
104 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
105 #define JAVA_MIN_SUPPORTED_VERSION 45
106 #define JAVA_PREVIEW_MINOR_VERSION 65535
107
108 // Used for two backward compatibility reasons:
109 // - to check for new additions to the class file format in JDK1.5
110 // - to check for bug fixes in the format checker in JDK1.5
111 #define JAVA_1_5_VERSION 49
112
113 // Used for backward compatibility reasons:
114 // - to check for javac bug fixes that happened after 1.5
115 // - also used as the max version when running in jdk6
116 #define JAVA_6_VERSION 50
117
118 // Used for backward compatibility reasons:
119 // - to disallow argument and require ACC_STATIC for <clinit> methods
120 #define JAVA_7_VERSION 51
121
122 // Extension method support.
123 #define JAVA_8_VERSION 52
124
125 #define JAVA_9_VERSION 53
126
127 #define JAVA_10_VERSION 54
128
129 #define JAVA_11_VERSION 55
130
131 #define JAVA_12_VERSION 56
132
133 #define JAVA_13_VERSION 57
134
135 #define JAVA_14_VERSION 58
136
137 #define JAVA_15_VERSION 59
138
139 #define JAVA_16_VERSION 60
140
141 #define JAVA_17_VERSION 61
142
143 #define JAVA_18_VERSION 62
144
145 #define CONSTANT_CLASS_DESCRIPTORS 62
146
147
148 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
149 assert((bad_constant == JVM_CONSTANT_Module ||
150 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
151 "Unexpected bad constant pool entry");
152 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
153 }
154
155 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
156 ConstantPool* cp,
157 const int length,
158 TRAPS) {
159 assert(stream != NULL, "invariant");
160 assert(cp != NULL, "invariant");
161
162 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
163 // this function (_current can be allocated in a register, with scalar
164 // replacement of aggregates). The _current pointer is copied back to
165 // stream() when this function returns. DON'T call another method within
166 // this method that uses stream().
167 const ClassFileStream cfs1 = *stream;
168 const ClassFileStream* const cfs = &cfs1;
169
170 assert(cfs->allocated_on_stack(), "should be local");
171 debug_only(const u1* const old_current = stream->current();)
172
173 // Used for batching symbol allocations.
174 const char* names[SymbolTable::symbol_alloc_batch_size];
175 int lengths[SymbolTable::symbol_alloc_batch_size];
176 int indices[SymbolTable::symbol_alloc_batch_size];
177 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
178 int names_count = 0;
179
180 // parsing Index 0 is unused
181 for (int index = 1; index < length; index++) {
182 // Each of the following case guarantees one more byte in the stream
183 // for the following tag or the access_flags following constant pool,
184 // so we don't need bounds-check for reading tag.
185 const u1 tag = cfs->get_u1_fast();
186 switch (tag) {
187 case JVM_CONSTANT_Class: {
188 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
189 const u2 name_index = cfs->get_u2_fast();
190 cp->klass_index_at_put(index, name_index);
191 break;
192 }
193 case JVM_CONSTANT_Fieldref: {
194 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
195 const u2 class_index = cfs->get_u2_fast();
196 const u2 name_and_type_index = cfs->get_u2_fast();
197 cp->field_at_put(index, class_index, name_and_type_index);
198 break;
199 }
200 case JVM_CONSTANT_Methodref: {
201 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
202 const u2 class_index = cfs->get_u2_fast();
203 const u2 name_and_type_index = cfs->get_u2_fast();
204 cp->method_at_put(index, class_index, name_and_type_index);
205 break;
206 }
207 case JVM_CONSTANT_InterfaceMethodref: {
208 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
209 const u2 class_index = cfs->get_u2_fast();
210 const u2 name_and_type_index = cfs->get_u2_fast();
211 cp->interface_method_at_put(index, class_index, name_and_type_index);
212 break;
213 }
214 case JVM_CONSTANT_String : {
215 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
216 const u2 string_index = cfs->get_u2_fast();
217 cp->string_index_at_put(index, string_index);
218 break;
219 }
220 case JVM_CONSTANT_MethodHandle :
221 case JVM_CONSTANT_MethodType: {
222 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
223 classfile_parse_error(
224 "Class file version does not support constant tag %u in class file %s",
225 tag, THREAD);
226 return;
227 }
228 if (tag == JVM_CONSTANT_MethodHandle) {
229 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
230 const u1 ref_kind = cfs->get_u1_fast();
231 const u2 method_index = cfs->get_u2_fast();
232 cp->method_handle_index_at_put(index, ref_kind, method_index);
233 }
234 else if (tag == JVM_CONSTANT_MethodType) {
235 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
236 const u2 signature_index = cfs->get_u2_fast();
237 cp->method_type_index_at_put(index, signature_index);
238 }
239 else {
240 ShouldNotReachHere();
241 }
242 break;
243 }
244 case JVM_CONSTANT_Dynamic : {
245 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
246 classfile_parse_error(
247 "Class file version does not support constant tag %u in class file %s",
248 tag, THREAD);
249 return;
250 }
251 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
252 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
253 const u2 name_and_type_index = cfs->get_u2_fast();
254 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
255 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
256 }
257 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
258 break;
259 }
260 case JVM_CONSTANT_InvokeDynamic : {
261 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
262 classfile_parse_error(
263 "Class file version does not support constant tag %u in class file %s",
264 tag, THREAD);
265 return;
266 }
267 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
268 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
269 const u2 name_and_type_index = cfs->get_u2_fast();
270 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
271 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
272 }
273 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
274 break;
275 }
276 case JVM_CONSTANT_Integer: {
277 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
278 const u4 bytes = cfs->get_u4_fast();
279 cp->int_at_put(index, (jint)bytes);
280 break;
281 }
282 case JVM_CONSTANT_Float: {
283 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
284 const u4 bytes = cfs->get_u4_fast();
285 cp->float_at_put(index, *(jfloat*)&bytes);
286 break;
287 }
288 case JVM_CONSTANT_Long: {
289 // A mangled type might cause you to overrun allocated memory
290 guarantee_property(index + 1 < length,
291 "Invalid constant pool entry %u in class file %s",
292 index,
293 CHECK);
294 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
295 const u8 bytes = cfs->get_u8_fast();
296 cp->long_at_put(index, bytes);
297 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
298 break;
299 }
300 case JVM_CONSTANT_Double: {
301 // A mangled type might cause you to overrun allocated memory
302 guarantee_property(index+1 < length,
303 "Invalid constant pool entry %u in class file %s",
304 index,
305 CHECK);
306 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
307 const u8 bytes = cfs->get_u8_fast();
308 cp->double_at_put(index, *(jdouble*)&bytes);
309 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
310 break;
311 }
312 case JVM_CONSTANT_NameAndType: {
313 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
314 const u2 name_index = cfs->get_u2_fast();
315 const u2 signature_index = cfs->get_u2_fast();
316 cp->name_and_type_at_put(index, name_index, signature_index);
317 break;
318 }
319 case JVM_CONSTANT_Utf8 : {
320 cfs->guarantee_more(2, CHECK); // utf8_length
321 u2 utf8_length = cfs->get_u2_fast();
322 const u1* utf8_buffer = cfs->current();
323 assert(utf8_buffer != NULL, "null utf8 buffer");
324 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
325 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
326 cfs->skip_u1_fast(utf8_length);
327
328 // Before storing the symbol, make sure it's legal
329 if (_need_verify) {
330 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
331 }
332
333 unsigned int hash;
334 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
335 utf8_length,
336 hash);
337 if (result == NULL) {
338 names[names_count] = (const char*)utf8_buffer;
339 lengths[names_count] = utf8_length;
340 indices[names_count] = index;
341 hashValues[names_count++] = hash;
342 if (names_count == SymbolTable::symbol_alloc_batch_size) {
343 SymbolTable::new_symbols(_loader_data,
344 constantPoolHandle(THREAD, cp),
345 names_count,
346 names,
347 lengths,
348 indices,
349 hashValues);
350 names_count = 0;
351 }
352 } else {
353 cp->symbol_at_put(index, result);
354 }
355 break;
356 }
357 case JVM_CONSTANT_Module:
358 case JVM_CONSTANT_Package: {
359 // Record that an error occurred in these two cases but keep parsing so
360 // that ACC_Module can be checked for in the access_flags. Need to
361 // throw NoClassDefFoundError in that case.
362 if (_major_version >= JAVA_9_VERSION) {
363 cfs->guarantee_more(3, CHECK);
364 cfs->get_u2_fast();
365 set_class_bad_constant_seen(tag);
366 break;
367 }
368 }
369 default: {
370 classfile_parse_error("Unknown constant tag %u in class file %s",
371 tag,
372 THREAD);
373 return;
374 }
375 } // end of switch(tag)
376 } // end of for
377
378 // Allocate the remaining symbols
379 if (names_count > 0) {
380 SymbolTable::new_symbols(_loader_data,
381 constantPoolHandle(THREAD, cp),
382 names_count,
383 names,
384 lengths,
385 indices,
386 hashValues);
387 }
388
389 // Copy _current pointer of local copy back to stream.
390 assert(stream->current() == old_current, "non-exclusive use of stream");
391 stream->set_current(cfs1.current());
392
393 }
394
395 static inline bool valid_cp_range(int index, int length) {
396 return (index > 0 && index < length);
397 }
398
399 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
400 assert(cp != NULL, "invariant");
401 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
402 return cp->symbol_at(index);
403 }
404 return NULL;
405 }
406
407 #ifdef ASSERT
408 PRAGMA_DIAG_PUSH
409 PRAGMA_FORMAT_NONLITERAL_IGNORED
410 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
411 ResourceMark rm(THREAD);
412 fatal(msg, _class_name->as_C_string());
413 }
414
415 void ClassFileParser::report_assert_property_failure(const char* msg,
416 int index,
417 TRAPS) const {
418 ResourceMark rm(THREAD);
419 fatal(msg, index, _class_name->as_C_string());
420 }
421 PRAGMA_DIAG_POP
422 #endif
423
424 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
425 ConstantPool* const cp,
426 const int length,
427 TRAPS) {
428 assert(cp != NULL, "invariant");
429 assert(stream != NULL, "invariant");
430
431 // parsing constant pool entries
432 parse_constant_pool_entries(stream, cp, length, CHECK);
433 if (class_bad_constant_seen() != 0) {
434 // a bad CP entry has been detected previously so stop parsing and just return.
435 return;
436 }
437
438 int index = 1; // declared outside of loops for portability
439 int num_klasses = 0;
440
441 // first verification pass - validate cross references
442 // and fixup class and string constants
443 for (index = 1; index < length; index++) { // Index 0 is unused
444 const jbyte tag = cp->tag_at(index).value();
445 switch (tag) {
446 case JVM_CONSTANT_Class: {
447 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
448 break;
449 }
450 case JVM_CONSTANT_Fieldref:
451 // fall through
452 case JVM_CONSTANT_Methodref:
453 // fall through
454 case JVM_CONSTANT_InterfaceMethodref: {
455 if (!_need_verify) break;
456 const int klass_ref_index = cp->klass_ref_index_at(index);
457 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
458 check_property(valid_klass_reference_at(klass_ref_index),
459 "Invalid constant pool index %u in class file %s",
460 klass_ref_index, CHECK);
461 check_property(valid_cp_range(name_and_type_ref_index, length) &&
462 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
463 "Invalid constant pool index %u in class file %s",
464 name_and_type_ref_index, CHECK);
465 break;
466 }
467 case JVM_CONSTANT_String: {
468 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
469 break;
470 }
471 case JVM_CONSTANT_Integer:
472 break;
473 case JVM_CONSTANT_Float:
474 break;
475 case JVM_CONSTANT_Long:
476 case JVM_CONSTANT_Double: {
477 index++;
478 check_property(
479 (index < length && cp->tag_at(index).is_invalid()),
480 "Improper constant pool long/double index %u in class file %s",
481 index, CHECK);
482 break;
483 }
484 case JVM_CONSTANT_NameAndType: {
485 if (!_need_verify) break;
486 const int name_ref_index = cp->name_ref_index_at(index);
487 const int signature_ref_index = cp->signature_ref_index_at(index);
488 check_property(valid_symbol_at(name_ref_index),
489 "Invalid constant pool index %u in class file %s",
490 name_ref_index, CHECK);
491 check_property(valid_symbol_at(signature_ref_index),
492 "Invalid constant pool index %u in class file %s",
493 signature_ref_index, CHECK);
494 break;
495 }
496 case JVM_CONSTANT_Utf8:
497 break;
498 case JVM_CONSTANT_UnresolvedClass: // fall-through
499 case JVM_CONSTANT_UnresolvedClassInError: {
500 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
501 break;
502 }
503 case JVM_CONSTANT_ClassIndex: {
504 const int class_index = cp->klass_index_at(index);
505 check_property(valid_symbol_at(class_index),
506 "Invalid constant pool index %u in class file %s",
507 class_index, CHECK);
508
509 Symbol* const name = cp->symbol_at(class_index);
510 const unsigned int name_len = name->utf8_length();
511 if (name->is_Q_signature()) {
512 cp->unresolved_qdescriptor_at_put(index, class_index, num_klasses++);
513 } else {
514 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
515 }
516 break;
517 }
518 case JVM_CONSTANT_StringIndex: {
519 const int string_index = cp->string_index_at(index);
520 check_property(valid_symbol_at(string_index),
521 "Invalid constant pool index %u in class file %s",
522 string_index, CHECK);
523 Symbol* const sym = cp->symbol_at(string_index);
524 cp->unresolved_string_at_put(index, sym);
525 break;
526 }
527 case JVM_CONSTANT_MethodHandle: {
528 const int ref_index = cp->method_handle_index_at(index);
529 check_property(valid_cp_range(ref_index, length),
530 "Invalid constant pool index %u in class file %s",
531 ref_index, CHECK);
532 const constantTag tag = cp->tag_at(ref_index);
533 const int ref_kind = cp->method_handle_ref_kind_at(index);
534
535 switch (ref_kind) {
536 case JVM_REF_getField:
537 case JVM_REF_getStatic:
538 case JVM_REF_putField:
539 case JVM_REF_putStatic: {
540 check_property(
541 tag.is_field(),
542 "Invalid constant pool index %u in class file %s (not a field)",
543 ref_index, CHECK);
544 break;
545 }
546 case JVM_REF_invokeVirtual:
547 case JVM_REF_newInvokeSpecial: {
548 check_property(
549 tag.is_method(),
550 "Invalid constant pool index %u in class file %s (not a method)",
551 ref_index, CHECK);
552 break;
553 }
554 case JVM_REF_invokeStatic:
555 case JVM_REF_invokeSpecial: {
556 check_property(
557 tag.is_method() ||
558 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
559 "Invalid constant pool index %u in class file %s (not a method)",
560 ref_index, CHECK);
561 break;
562 }
563 case JVM_REF_invokeInterface: {
564 check_property(
565 tag.is_interface_method(),
566 "Invalid constant pool index %u in class file %s (not an interface method)",
567 ref_index, CHECK);
568 break;
569 }
570 default: {
571 classfile_parse_error(
572 "Bad method handle kind at constant pool index %u in class file %s",
573 index, THREAD);
574 return;
575 }
576 } // switch(refkind)
577 // Keep the ref_index unchanged. It will be indirected at link-time.
578 break;
579 } // case MethodHandle
580 case JVM_CONSTANT_MethodType: {
581 const int ref_index = cp->method_type_index_at(index);
582 check_property(valid_symbol_at(ref_index),
583 "Invalid constant pool index %u in class file %s",
584 ref_index, CHECK);
585 break;
586 }
587 case JVM_CONSTANT_Dynamic: {
588 const int name_and_type_ref_index =
589 cp->bootstrap_name_and_type_ref_index_at(index);
590
591 check_property(valid_cp_range(name_and_type_ref_index, length) &&
592 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
593 "Invalid constant pool index %u in class file %s",
594 name_and_type_ref_index, CHECK);
595 // bootstrap specifier index must be checked later,
596 // when BootstrapMethods attr is available
597
598 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
599 cp->set_has_dynamic_constant();
600 break;
601 }
602 case JVM_CONSTANT_InvokeDynamic: {
603 const int name_and_type_ref_index =
604 cp->bootstrap_name_and_type_ref_index_at(index);
605
606 check_property(valid_cp_range(name_and_type_ref_index, length) &&
607 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
608 "Invalid constant pool index %u in class file %s",
609 name_and_type_ref_index, CHECK);
610 // bootstrap specifier index must be checked later,
611 // when BootstrapMethods attr is available
612 break;
613 }
614 default: {
615 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
616 ShouldNotReachHere();
617 break;
618 }
619 } // switch(tag)
620 } // end of for
621
622 cp->allocate_resolved_klasses(_loader_data, num_klasses, CHECK);
623
624 if (!_need_verify) {
625 return;
626 }
627
628 // second verification pass - checks the strings are of the right format.
629 // but not yet to the other entries
630 for (index = 1; index < length; index++) {
631 const jbyte tag = cp->tag_at(index).value();
632 switch (tag) {
633 case JVM_CONSTANT_UnresolvedClass: {
634 const Symbol* const class_name = cp->klass_name_at(index);
635 // check the name
636 verify_legal_class_name(class_name, CHECK);
637 break;
638 }
639 case JVM_CONSTANT_NameAndType: {
640 if (_need_verify) {
641 const int sig_index = cp->signature_ref_index_at(index);
642 const int name_index = cp->name_ref_index_at(index);
643 const Symbol* const name = cp->symbol_at(name_index);
644 const Symbol* const sig = cp->symbol_at(sig_index);
645 guarantee_property(sig->utf8_length() != 0,
646 "Illegal zero length constant pool entry at %d in class %s",
647 sig_index, CHECK);
648 guarantee_property(name->utf8_length() != 0,
649 "Illegal zero length constant pool entry at %d in class %s",
650 name_index, CHECK);
651
652 if (Signature::is_method(sig)) {
653 // Format check method name and signature
654 verify_legal_method_name(name, CHECK);
655 verify_legal_method_signature(name, sig, CHECK);
656 } else {
657 // Format check field name and signature
658 verify_legal_field_name(name, CHECK);
659 verify_legal_field_signature(name, sig, CHECK);
660 }
661 }
662 break;
663 }
664 case JVM_CONSTANT_Dynamic: {
665 const int name_and_type_ref_index =
666 cp->name_and_type_ref_index_at(index);
667 // already verified to be utf8
668 const int name_ref_index =
669 cp->name_ref_index_at(name_and_type_ref_index);
670 // already verified to be utf8
671 const int signature_ref_index =
672 cp->signature_ref_index_at(name_and_type_ref_index);
673 const Symbol* const name = cp->symbol_at(name_ref_index);
674 const Symbol* const signature = cp->symbol_at(signature_ref_index);
675 if (_need_verify) {
676 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
677 // Need only to be sure signature is the right type.
678 if (Signature::is_method(signature)) {
679 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
680 }
681 }
682 break;
683 }
684 case JVM_CONSTANT_InvokeDynamic:
685 case JVM_CONSTANT_Fieldref:
686 case JVM_CONSTANT_Methodref:
687 case JVM_CONSTANT_InterfaceMethodref: {
688 const int name_and_type_ref_index =
689 cp->name_and_type_ref_index_at(index);
690 // already verified to be utf8
691 const int name_ref_index =
692 cp->name_ref_index_at(name_and_type_ref_index);
693 // already verified to be utf8
694 const int signature_ref_index =
695 cp->signature_ref_index_at(name_and_type_ref_index);
696 const Symbol* const name = cp->symbol_at(name_ref_index);
697 const Symbol* const signature = cp->symbol_at(signature_ref_index);
698 if (tag == JVM_CONSTANT_Fieldref) {
699 if (_need_verify) {
700 // Field name and signature are verified above, when iterating NameAndType_info.
701 // Need only to be sure signature is non-zero length and the right type.
702 if (Signature::is_method(signature)) {
703 throwIllegalSignature("Field", name, signature, CHECK);
704 }
705 }
706 } else {
707 if (_need_verify) {
708 // Method name and signature are individually verified above, when iterating
709 // NameAndType_info. Need to check here that signature is non-zero length and
710 // the right type.
711 if (!Signature::is_method(signature)) {
712 throwIllegalSignature("Method", name, signature, CHECK);
713 }
714 }
715 // If a class method name begins with '<', it must be "<init>" and have void signature
716 // unless it's an inline type.
717 const unsigned int name_len = name->utf8_length();
718 if (tag == JVM_CONSTANT_Methodref && name_len != 0 &&
719 name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
720 if (name != vmSymbols::object_initializer_name()) {
721 classfile_parse_error(
722 "Bad method name at constant pool index %u in class file %s",
723 name_ref_index, THREAD);
724 return;
725 } else if (!Signature::is_void_method(signature)) {
726 // if return type is non-void then it cannot be a basic primitive
727 // and primitve types must be supported.
728 if (!signature->ends_with(JVM_SIGNATURE_ENDCLASS) || !EnableValhalla) {
729 throwIllegalSignature("Method", name, signature, CHECK);
730 }
731 }
732 }
733 }
734 break;
735 }
736 case JVM_CONSTANT_MethodHandle: {
737 const int ref_index = cp->method_handle_index_at(index);
738 const int ref_kind = cp->method_handle_ref_kind_at(index);
739 switch (ref_kind) {
740 case JVM_REF_invokeVirtual:
741 case JVM_REF_invokeStatic:
742 case JVM_REF_invokeSpecial:
743 case JVM_REF_newInvokeSpecial: {
744 const int name_and_type_ref_index =
745 cp->name_and_type_ref_index_at(ref_index);
746 const int name_ref_index =
747 cp->name_ref_index_at(name_and_type_ref_index);
748 const Symbol* const name = cp->symbol_at(name_ref_index);
749 if (name != vmSymbols::object_initializer_name()) {
750 if (ref_kind == JVM_REF_newInvokeSpecial) {
751 classfile_parse_error(
752 "Bad constructor name at constant pool index %u in class file %s",
753 name_ref_index, THREAD);
754 return;
755 }
756 } else {
757 // The allowed invocation mode of <init> depends on its signature.
758 // This test corresponds to verify_invoke_instructions in the verifier.
759 const int signature_ref_index =
760 cp->signature_ref_index_at(name_and_type_ref_index);
761 const Symbol* const signature = cp->symbol_at(signature_ref_index);
762 if (signature->is_void_method_signature()
763 && ref_kind == JVM_REF_newInvokeSpecial) {
764 // OK, could be a constructor call
765 } else if (!signature->is_void_method_signature()
766 && ref_kind == JVM_REF_invokeStatic) {
767 // also OK, could be a static factory call
768 } else {
769 classfile_parse_error(
770 "Bad method name at constant pool index %u in class file %s",
771 name_ref_index, THREAD);
772 return;
773 }
774 }
775 break;
776 }
777 // Other ref_kinds are already fully checked in previous pass.
778 } // switch(ref_kind)
779 break;
780 }
781 case JVM_CONSTANT_MethodType: {
782 const Symbol* const no_name = vmSymbols::type_name(); // place holder
783 const Symbol* const signature = cp->method_type_signature_at(index);
784 verify_legal_method_signature(no_name, signature, CHECK);
785 break;
786 }
787 case JVM_CONSTANT_Utf8: {
788 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
789 }
790 } // switch(tag)
791 } // end of for
792 }
793
794 class NameSigHash: public ResourceObj {
795 public:
796 const Symbol* _name; // name
797 const Symbol* _sig; // signature
798 NameSigHash* _next; // Next entry in hash table
799 };
800
801 static const int HASH_ROW_SIZE = 256;
802
803 static unsigned int hash(const Symbol* name, const Symbol* sig) {
804 unsigned int raw_hash = 0;
805 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
806 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
807
808 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
809 }
810
811
812 static void initialize_hashtable(NameSigHash** table) {
813 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
814 }
815 // Return false if the name/sig combination is found in table.
816 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
817 // The old format checker uses heap sort to find duplicates.
818 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
819 // of table since we don't expect Symbol*'s to move.
820 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
821 assert(name != NULL, "name in constant pool is NULL");
822
823 // First lookup for duplicates
824 int index = hash(name, sig);
825 NameSigHash* entry = table[index];
826 while (entry != NULL) {
827 if (entry->_name == name && entry->_sig == sig) {
828 return false;
829 }
830 entry = entry->_next;
831 }
832
833 // No duplicate is found, allocate a new entry and fill it.
834 entry = new NameSigHash();
835 entry->_name = name;
836 entry->_sig = sig;
837
838 // Insert into hash table
839 entry->_next = table[index];
840 table[index] = entry;
841
842 return true;
843 }
844
845 // Side-effects: populates the _local_interfaces field
846 void ClassFileParser::parse_interfaces(const ClassFileStream* stream,
847 int itfs_len,
848 ConstantPool* cp,
849 bool* const has_nonstatic_concrete_methods,
850 // FIXME: lots of these functions
851 // declare their parameters as const,
852 // which adds only noise to the code.
853 // Remove the spurious const modifiers.
854 // Many are of the form "const int x"
855 // or "T* const x".
856 bool* const is_declared_atomic,
857 TRAPS) {
858 assert(stream != NULL, "invariant");
859 assert(cp != NULL, "invariant");
860 assert(has_nonstatic_concrete_methods != NULL, "invariant");
861
862 if (itfs_len == 0) {
863 _temp_local_interfaces = new GrowableArray<InstanceKlass*>(0);
864 } else {
865 assert(itfs_len > 0, "only called for len>0");
866 _temp_local_interfaces = new GrowableArray<InstanceKlass*>(itfs_len);
867 int index = 0;
868 for (index = 0; index < itfs_len; index++) {
869 const u2 interface_index = stream->get_u2(CHECK);
870 Klass* interf;
871 check_property(
872 valid_klass_reference_at(interface_index),
873 "Interface name has bad constant pool index %u in class file %s",
874 interface_index, CHECK);
875 if (cp->tag_at(interface_index).is_klass()) {
876 interf = cp->resolved_klass_at(interface_index);
877 } else {
878 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
879
880 // Don't need to check legal name because it's checked when parsing constant pool.
881 // But need to make sure it's not an array type.
882 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
883 "Bad interface name in class file %s", CHECK);
884
885 // Call resolve_super so class circularity is checked
886 interf = SystemDictionary::resolve_super_or_fail(
887 _class_name,
888 unresolved_klass,
889 Handle(THREAD, _loader_data->class_loader()),
890 _protection_domain,
891 false,
892 CHECK);
893 }
894
895 if (!interf->is_interface()) {
896 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
897 err_msg("class %s can not implement %s, because it is not an interface (%s)",
898 _class_name->as_klass_external_name(),
899 interf->external_name(),
900 interf->class_in_module_of_loader()));
901 }
902
903 InstanceKlass* ik = InstanceKlass::cast(interf);
904 if (is_inline_type() && ik->invalid_inline_super()) {
905 ResourceMark rm(THREAD);
906 Exceptions::fthrow(
907 THREAD_AND_LOCATION,
908 vmSymbols::java_lang_IncompatibleClassChangeError(),
909 "Inline type %s attempts to implement interface java.lang.IdentityObject",
910 _class_name->as_klass_external_name());
911 return;
912 }
913 if (ik->invalid_inline_super()) {
914 set_invalid_inline_super();
915 }
916 if (ik->has_nonstatic_concrete_methods()) {
917 *has_nonstatic_concrete_methods = true;
918 }
919 if (ik->is_declared_atomic()) {
920 *is_declared_atomic = true;
921 }
922 if (ik->name() == vmSymbols::java_lang_IdentityObject()) {
923 _implements_identityObject = true;
924 }
925 if (ik->name() == vmSymbols::java_lang_PrimitiveObject()) {
926 // further checks for "is_invalid_super_for_inline_type()" needed later
927 // needs field parsing, delay unitl post_process_parse_stream()
928 _implements_primitiveObject = true;
929 }
930 _temp_local_interfaces->append(ik);
931 }
932
933 if (!_need_verify || itfs_len <= 1) {
934 return;
935 }
936
937 // Check if there's any duplicates in interfaces
938 ResourceMark rm(THREAD);
939 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
940 NameSigHash*,
941 HASH_ROW_SIZE);
942 initialize_hashtable(interface_names);
943 bool dup = false;
944 const Symbol* name = NULL;
945 {
946 debug_only(NoSafepointVerifier nsv;)
947 for (index = 0; index < itfs_len; index++) {
948 const InstanceKlass* const k = _temp_local_interfaces->at(index);
949 name = k->name();
950 // If no duplicates, add (name, NULL) in hashtable interface_names.
951 if (!put_after_lookup(name, NULL, interface_names)) {
952 dup = true;
953 break;
954 }
955 }
956 }
957 if (dup) {
958 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
959 name->as_C_string(), THREAD);
960 }
961 }
962 }
963
964 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
965 int constantvalue_index,
966 int signature_index,
967 TRAPS) const {
968 // Make sure the constant pool entry is of a type appropriate to this field
969 guarantee_property(
970 (constantvalue_index > 0 &&
971 constantvalue_index < cp->length()),
972 "Bad initial value index %u in ConstantValue attribute in class file %s",
973 constantvalue_index, CHECK);
974
975 const constantTag value_type = cp->tag_at(constantvalue_index);
976 switch(cp->basic_type_for_signature_at(signature_index)) {
977 case T_LONG: {
978 guarantee_property(value_type.is_long(),
979 "Inconsistent constant value type in class file %s",
980 CHECK);
981 break;
982 }
983 case T_FLOAT: {
984 guarantee_property(value_type.is_float(),
985 "Inconsistent constant value type in class file %s",
986 CHECK);
987 break;
988 }
989 case T_DOUBLE: {
990 guarantee_property(value_type.is_double(),
991 "Inconsistent constant value type in class file %s",
992 CHECK);
993 break;
994 }
995 case T_BYTE:
996 case T_CHAR:
997 case T_SHORT:
998 case T_BOOLEAN:
999 case T_INT: {
1000 guarantee_property(value_type.is_int(),
1001 "Inconsistent constant value type in class file %s",
1002 CHECK);
1003 break;
1004 }
1005 case T_OBJECT: {
1006 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1007 && value_type.is_string()),
1008 "Bad string initial value in class file %s",
1009 CHECK);
1010 break;
1011 }
1012 default: {
1013 classfile_parse_error("Unable to set initial value %u in class file %s",
1014 constantvalue_index,
1015 THREAD);
1016 }
1017 }
1018 }
1019
1020 class AnnotationCollector : public ResourceObj{
1021 public:
1022 enum Location { _in_field, _in_method, _in_class };
1023 enum ID {
1024 _unknown = 0,
1025 _method_CallerSensitive,
1026 _method_ForceInline,
1027 _method_DontInline,
1028 _method_InjectedProfile,
1029 _method_LambdaForm_Compiled,
1030 _method_Hidden,
1031 _method_Scoped,
1032 _method_IntrinsicCandidate,
1033 _jdk_internal_vm_annotation_Contended,
1034 _field_Stable,
1035 _jdk_internal_vm_annotation_ReservedStackAccess,
1036 _jdk_internal_ValueBased,
1037 _annotation_LIMIT
1038 };
1039 const Location _location;
1040 int _annotations_present;
1041 u2 _contended_group;
1042
1043 AnnotationCollector(Location location)
1044 : _location(location), _annotations_present(0), _contended_group(0)
1045 {
1046 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1047 }
1048 // If this annotation name has an ID, report it (or _none).
1049 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, bool can_access_vm_annotations);
1050 // Set the annotation name:
1051 void set_annotation(ID id) {
1052 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1053 _annotations_present |= nth_bit((int)id);
1054 }
1055
1056 void remove_annotation(ID id) {
1057 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1058 _annotations_present &= ~nth_bit((int)id);
1059 }
1060
1061 // Report if the annotation is present.
1062 bool has_any_annotations() const { return _annotations_present != 0; }
1063 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1064
1065 void set_contended_group(u2 group) { _contended_group = group; }
1066 u2 contended_group() const { return _contended_group; }
1067
1068 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1069
1070 void set_stable(bool stable) { set_annotation(_field_Stable); }
1071 bool is_stable() const { return has_annotation(_field_Stable); }
1072 };
1073
1074 // This class also doubles as a holder for metadata cleanup.
1075 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1076 private:
1077 ClassLoaderData* _loader_data;
1078 AnnotationArray* _field_annotations;
1079 AnnotationArray* _field_type_annotations;
1080 public:
1081 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1082 AnnotationCollector(_in_field),
1083 _loader_data(loader_data),
1084 _field_annotations(NULL),
1085 _field_type_annotations(NULL) {}
1086 ~FieldAnnotationCollector();
1087 void apply_to(FieldInfo* f);
1088 AnnotationArray* field_annotations() { return _field_annotations; }
1089 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1090
1091 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1092 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1093 };
1094
1095 class MethodAnnotationCollector : public AnnotationCollector{
1096 public:
1097 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1098 void apply_to(const methodHandle& m);
1099 };
1100
1101 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1102 public:
1103 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1104 void apply_to(InstanceKlass* ik);
1105 };
1106
1107
1108 static int skip_annotation_value(const u1*, int, int); // fwd decl
1109
1110 // Safely increment index by val if does not pass limit
1111 #define SAFE_ADD(index, limit, val) \
1112 if (index >= limit - val) return limit; \
1113 index += val;
1114
1115 // Skip an annotation. Return >=limit if there is any problem.
1116 static int skip_annotation(const u1* buffer, int limit, int index) {
1117 assert(buffer != NULL, "invariant");
1118 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1119 // value := switch (tag:u1) { ... }
1120 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1121 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1122 while (--nmem >= 0 && index < limit) {
1123 SAFE_ADD(index, limit, 2); // skip member
1124 index = skip_annotation_value(buffer, limit, index);
1125 }
1126 return index;
1127 }
1128
1129 // Skip an annotation value. Return >=limit if there is any problem.
1130 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1131 assert(buffer != NULL, "invariant");
1132
1133 // value := switch (tag:u1) {
1134 // case B, C, I, S, Z, D, F, J, c: con:u2;
1135 // case e: e_class:u2 e_name:u2;
1136 // case s: s_con:u2;
1137 // case [: do(nval:u2) {value};
1138 // case @: annotation;
1139 // case s: s_con:u2;
1140 // }
1141 SAFE_ADD(index, limit, 1); // read tag
1142 const u1 tag = buffer[index - 1];
1143 switch (tag) {
1144 case 'B':
1145 case 'C':
1146 case 'I':
1147 case 'S':
1148 case 'Z':
1149 case 'D':
1150 case 'F':
1151 case 'J':
1152 case 'c':
1153 case 's':
1154 SAFE_ADD(index, limit, 2); // skip con or s_con
1155 break;
1156 case 'e':
1157 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1158 break;
1159 case '[':
1160 {
1161 SAFE_ADD(index, limit, 2); // read nval
1162 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1163 while (--nval >= 0 && index < limit) {
1164 index = skip_annotation_value(buffer, limit, index);
1165 }
1166 }
1167 break;
1168 case '@':
1169 index = skip_annotation(buffer, limit, index);
1170 break;
1171 default:
1172 return limit; // bad tag byte
1173 }
1174 return index;
1175 }
1176
1177 // Sift through annotations, looking for those significant to the VM:
1178 static void parse_annotations(const ConstantPool* const cp,
1179 const u1* buffer, int limit,
1180 AnnotationCollector* coll,
1181 ClassLoaderData* loader_data,
1182 const bool can_access_vm_annotations) {
1183
1184 assert(cp != NULL, "invariant");
1185 assert(buffer != NULL, "invariant");
1186 assert(coll != NULL, "invariant");
1187 assert(loader_data != NULL, "invariant");
1188
1189 // annotations := do(nann:u2) {annotation}
1190 int index = 2; // read nann
1191 if (index >= limit) return;
1192 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1193 enum { // initial annotation layout
1194 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1195 count_off = 2, // u2 such as 1 (one value)
1196 member_off = 4, // utf8 such as 'value'
1197 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1198 e_tag_val = 'e',
1199 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1200 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1201 e_size = 11, // end of 'e' annotation
1202 c_tag_val = 'c', // payload is type
1203 c_con_off = 7, // utf8 payload, such as 'I'
1204 c_size = 9, // end of 'c' annotation
1205 s_tag_val = 's', // payload is String
1206 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1207 s_size = 9,
1208 min_size = 6 // smallest possible size (zero members)
1209 };
1210 // Cannot add min_size to index in case of overflow MAX_INT
1211 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1212 int index0 = index;
1213 index = skip_annotation(buffer, limit, index);
1214 const u1* const abase = buffer + index0;
1215 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1216 const int count = Bytes::get_Java_u2((address)abase + count_off);
1217 const Symbol* const aname = check_symbol_at(cp, atype);
1218 if (aname == NULL) break; // invalid annotation name
1219 const Symbol* member = NULL;
1220 if (count >= 1) {
1221 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1222 member = check_symbol_at(cp, member_index);
1223 if (member == NULL) break; // invalid member name
1224 }
1225
1226 // Here is where parsing particular annotations will take place.
1227 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname, can_access_vm_annotations);
1228 if (AnnotationCollector::_unknown == id) continue;
1229 coll->set_annotation(id);
1230
1231 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1232 // @Contended can optionally specify the contention group.
1233 //
1234 // Contended group defines the equivalence class over the fields:
1235 // the fields within the same contended group are not treated distinct.
1236 // The only exception is default group, which does not incur the
1237 // equivalence. Naturally, contention group for classes is meaningless.
1238 //
1239 // While the contention group is specified as String, annotation
1240 // values are already interned, and we might as well use the constant
1241 // pool index as the group tag.
1242 //
1243 u2 group_index = 0; // default contended group
1244 if (count == 1
1245 && s_size == (index - index0) // match size
1246 && s_tag_val == *(abase + tag_off)
1247 && member == vmSymbols::value_name()) {
1248 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1249 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1250 group_index = 0; // default contended group
1251 }
1252 }
1253 coll->set_contended_group(group_index);
1254 }
1255 }
1256 }
1257
1258
1259 // Parse attributes for a field.
1260 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1261 u2 attributes_count,
1262 bool is_static, u2 signature_index,
1263 u2* const constantvalue_index_addr,
1264 bool* const is_synthetic_addr,
1265 u2* const generic_signature_index_addr,
1266 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1267 TRAPS) {
1268 assert(cfs != NULL, "invariant");
1269 assert(constantvalue_index_addr != NULL, "invariant");
1270 assert(is_synthetic_addr != NULL, "invariant");
1271 assert(generic_signature_index_addr != NULL, "invariant");
1272 assert(parsed_annotations != NULL, "invariant");
1273 assert(attributes_count > 0, "attributes_count should be greater than 0");
1274
1275 u2 constantvalue_index = 0;
1276 u2 generic_signature_index = 0;
1277 bool is_synthetic = false;
1278 const u1* runtime_visible_annotations = NULL;
1279 int runtime_visible_annotations_length = 0;
1280 const u1* runtime_invisible_annotations = NULL;
1281 int runtime_invisible_annotations_length = 0;
1282 const u1* runtime_visible_type_annotations = NULL;
1283 int runtime_visible_type_annotations_length = 0;
1284 const u1* runtime_invisible_type_annotations = NULL;
1285 int runtime_invisible_type_annotations_length = 0;
1286 bool runtime_invisible_annotations_exists = false;
1287 bool runtime_invisible_type_annotations_exists = false;
1288 const ConstantPool* const cp = _cp;
1289
1290 while (attributes_count--) {
1291 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1292 const u2 attribute_name_index = cfs->get_u2_fast();
1293 const u4 attribute_length = cfs->get_u4_fast();
1294 check_property(valid_symbol_at(attribute_name_index),
1295 "Invalid field attribute index %u in class file %s",
1296 attribute_name_index,
1297 CHECK);
1298
1299 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1300 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1301 // ignore if non-static
1302 if (constantvalue_index != 0) {
1303 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", THREAD);
1304 return;
1305 }
1306 check_property(
1307 attribute_length == 2,
1308 "Invalid ConstantValue field attribute length %u in class file %s",
1309 attribute_length, CHECK);
1310
1311 constantvalue_index = cfs->get_u2(CHECK);
1312 if (_need_verify) {
1313 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1314 }
1315 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1316 if (attribute_length != 0) {
1317 classfile_parse_error(
1318 "Invalid Synthetic field attribute length %u in class file %s",
1319 attribute_length, THREAD);
1320 return;
1321 }
1322 is_synthetic = true;
1323 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1324 if (attribute_length != 0) {
1325 classfile_parse_error(
1326 "Invalid Deprecated field attribute length %u in class file %s",
1327 attribute_length, THREAD);
1328 return;
1329 }
1330 } else if (_major_version >= JAVA_1_5_VERSION) {
1331 if (attribute_name == vmSymbols::tag_signature()) {
1332 if (generic_signature_index != 0) {
1333 classfile_parse_error(
1334 "Multiple Signature attributes for field in class file %s", THREAD);
1335 return;
1336 }
1337 if (attribute_length != 2) {
1338 classfile_parse_error(
1339 "Wrong size %u for field's Signature attribute in class file %s",
1340 attribute_length, THREAD);
1341 return;
1342 }
1343 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1344 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1345 if (runtime_visible_annotations != NULL) {
1346 classfile_parse_error(
1347 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", THREAD);
1348 return;
1349 }
1350 runtime_visible_annotations_length = attribute_length;
1351 runtime_visible_annotations = cfs->current();
1352 assert(runtime_visible_annotations != NULL, "null visible annotations");
1353 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1354 parse_annotations(cp,
1355 runtime_visible_annotations,
1356 runtime_visible_annotations_length,
1357 parsed_annotations,
1358 _loader_data,
1359 _can_access_vm_annotations);
1360 cfs->skip_u1_fast(runtime_visible_annotations_length);
1361 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1362 if (runtime_invisible_annotations_exists) {
1363 classfile_parse_error(
1364 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", THREAD);
1365 return;
1366 }
1367 runtime_invisible_annotations_exists = true;
1368 if (PreserveAllAnnotations) {
1369 runtime_invisible_annotations_length = attribute_length;
1370 runtime_invisible_annotations = cfs->current();
1371 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1372 }
1373 cfs->skip_u1(attribute_length, CHECK);
1374 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1375 if (runtime_visible_type_annotations != NULL) {
1376 classfile_parse_error(
1377 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", THREAD);
1378 return;
1379 }
1380 runtime_visible_type_annotations_length = attribute_length;
1381 runtime_visible_type_annotations = cfs->current();
1382 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1383 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1384 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1385 if (runtime_invisible_type_annotations_exists) {
1386 classfile_parse_error(
1387 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", THREAD);
1388 return;
1389 } else {
1390 runtime_invisible_type_annotations_exists = true;
1391 }
1392 if (PreserveAllAnnotations) {
1393 runtime_invisible_type_annotations_length = attribute_length;
1394 runtime_invisible_type_annotations = cfs->current();
1395 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1396 }
1397 cfs->skip_u1(attribute_length, CHECK);
1398 } else {
1399 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1400 }
1401 } else {
1402 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1403 }
1404 }
1405
1406 *constantvalue_index_addr = constantvalue_index;
1407 *is_synthetic_addr = is_synthetic;
1408 *generic_signature_index_addr = generic_signature_index;
1409 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1410 runtime_visible_annotations_length,
1411 runtime_invisible_annotations,
1412 runtime_invisible_annotations_length,
1413 CHECK);
1414 parsed_annotations->set_field_annotations(a);
1415 a = assemble_annotations(runtime_visible_type_annotations,
1416 runtime_visible_type_annotations_length,
1417 runtime_invisible_type_annotations,
1418 runtime_invisible_type_annotations_length,
1419 CHECK);
1420 parsed_annotations->set_field_type_annotations(a);
1421 return;
1422 }
1423
1424
1425 // Field allocation types. Used for computing field offsets.
1426
1427 enum FieldAllocationType {
1428 STATIC_OOP, // Oops
1429 STATIC_BYTE, // Boolean, Byte, char
1430 STATIC_SHORT, // shorts
1431 STATIC_WORD, // ints
1432 STATIC_DOUBLE, // aligned long or double
1433 STATIC_INLINE, // inline type field
1434 NONSTATIC_OOP,
1435 NONSTATIC_BYTE,
1436 NONSTATIC_SHORT,
1437 NONSTATIC_WORD,
1438 NONSTATIC_DOUBLE,
1439 NONSTATIC_INLINE,
1440 MAX_FIELD_ALLOCATION_TYPE,
1441 BAD_ALLOCATION_TYPE = -1
1442 };
1443
1444 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1445 BAD_ALLOCATION_TYPE, // 0
1446 BAD_ALLOCATION_TYPE, // 1
1447 BAD_ALLOCATION_TYPE, // 2
1448 BAD_ALLOCATION_TYPE, // 3
1449 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1450 NONSTATIC_SHORT, // T_CHAR = 5,
1451 NONSTATIC_WORD, // T_FLOAT = 6,
1452 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1453 NONSTATIC_BYTE, // T_BYTE = 8,
1454 NONSTATIC_SHORT, // T_SHORT = 9,
1455 NONSTATIC_WORD, // T_INT = 10,
1456 NONSTATIC_DOUBLE, // T_LONG = 11,
1457 NONSTATIC_OOP, // T_OBJECT = 12,
1458 NONSTATIC_OOP, // T_ARRAY = 13,
1459 NONSTATIC_OOP, // T_INLINE_TYPE = 14,
1460 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1461 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1462 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1463 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1464 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1465 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20,
1466 BAD_ALLOCATION_TYPE, // 0
1467 BAD_ALLOCATION_TYPE, // 1
1468 BAD_ALLOCATION_TYPE, // 2
1469 BAD_ALLOCATION_TYPE, // 3
1470 STATIC_BYTE , // T_BOOLEAN = 4,
1471 STATIC_SHORT, // T_CHAR = 5,
1472 STATIC_WORD, // T_FLOAT = 6,
1473 STATIC_DOUBLE, // T_DOUBLE = 7,
1474 STATIC_BYTE, // T_BYTE = 8,
1475 STATIC_SHORT, // T_SHORT = 9,
1476 STATIC_WORD, // T_INT = 10,
1477 STATIC_DOUBLE, // T_LONG = 11,
1478 STATIC_OOP, // T_OBJECT = 12,
1479 STATIC_OOP, // T_ARRAY = 13,
1480 STATIC_OOP, // T_INLINE_TYPE = 14,
1481 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1482 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1483 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1484 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1485 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1486 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20
1487 };
1488
1489 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type, bool is_inline_type) {
1490 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1491 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1492 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1493 if (is_inline_type) {
1494 result = is_static ? STATIC_INLINE : NONSTATIC_INLINE;
1495 }
1496 return result;
1497 }
1498
1499 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1500 public:
1501 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1502
1503 FieldAllocationCount() {
1504 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1505 count[i] = 0;
1506 }
1507 }
1508
1509 void update(bool is_static, BasicType type, bool is_inline_type) {
1510 FieldAllocationType atype = basic_type_to_atype(is_static, type, is_inline_type);
1511 if (atype != BAD_ALLOCATION_TYPE) {
1512 // Make sure there is no overflow with injected fields.
1513 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1514 count[atype]++;
1515 }
1516 }
1517 };
1518
1519 // Side-effects: populates the _fields, _fields_annotations,
1520 // _fields_type_annotations fields
1521 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1522 bool is_interface,
1523 bool is_inline_type,
1524 FieldAllocationCount* const fac,
1525 ConstantPool* cp,
1526 const int cp_size,
1527 u2* const java_fields_count_ptr,
1528 TRAPS) {
1529
1530 assert(cfs != NULL, "invariant");
1531 assert(fac != NULL, "invariant");
1532 assert(cp != NULL, "invariant");
1533 assert(java_fields_count_ptr != NULL, "invariant");
1534
1535 assert(NULL == _fields, "invariant");
1536 assert(NULL == _fields_annotations, "invariant");
1537 assert(NULL == _fields_type_annotations, "invariant");
1538
1539 cfs->guarantee_more(2, CHECK); // length
1540 const u2 length = cfs->get_u2_fast();
1541 *java_fields_count_ptr = length;
1542
1543 int num_injected = 0;
1544 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1545 &num_injected);
1546
1547 // two more slots are required for inline classes:
1548 // one for the static field with a reference to the pre-allocated default value
1549 // one for the field the JVM injects when detecting an empty inline class
1550 const int total_fields = length + num_injected + (is_inline_type ? 2 : 0);
1551
1552 // The field array starts with tuples of shorts
1553 // [access, name index, sig index, initial value index, byte offset].
1554 // A generic signature slot only exists for field with generic
1555 // signature attribute. And the access flag is set with
1556 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1557 // signature slots are at the end of the field array and after all
1558 // other fields data.
1559 //
1560 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1561 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1562 // ...
1563 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1564 // [generic signature index]
1565 // [generic signature index]
1566 // ...
1567 //
1568 // Allocate a temporary resource array for field data. For each field,
1569 // a slot is reserved in the temporary array for the generic signature
1570 // index. After parsing all fields, the data are copied to a permanent
1571 // array and any unused slots will be discarded.
1572 ResourceMark rm(THREAD);
1573 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1574 u2,
1575 total_fields * (FieldInfo::field_slots + 1));
1576
1577 // The generic signature slots start after all other fields' data.
1578 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1579 int num_generic_signature = 0;
1580 int instance_fields_count = 0;
1581 for (int n = 0; n < length; n++) {
1582 // access_flags, name_index, descriptor_index, attributes_count
1583 cfs->guarantee_more(8, CHECK);
1584
1585 jint recognized_modifiers = JVM_RECOGNIZED_FIELD_MODIFIERS;
1586
1587 const jint flags = cfs->get_u2_fast() & recognized_modifiers;
1588 verify_legal_field_modifiers(flags, is_interface, is_inline_type, CHECK);
1589 AccessFlags access_flags;
1590 access_flags.set_flags(flags);
1591
1592 const u2 name_index = cfs->get_u2_fast();
1593 check_property(valid_symbol_at(name_index),
1594 "Invalid constant pool index %u for field name in class file %s",
1595 name_index, CHECK);
1596 const Symbol* const name = cp->symbol_at(name_index);
1597 verify_legal_field_name(name, CHECK);
1598
1599 const u2 signature_index = cfs->get_u2_fast();
1600 check_property(valid_symbol_at(signature_index),
1601 "Invalid constant pool index %u for field signature in class file %s",
1602 signature_index, CHECK);
1603 const Symbol* const sig = cp->symbol_at(signature_index);
1604 verify_legal_field_signature(name, sig, CHECK);
1605 if (!access_flags.is_static()) instance_fields_count++;
1606
1607 u2 constantvalue_index = 0;
1608 bool is_synthetic = false;
1609 u2 generic_signature_index = 0;
1610 const bool is_static = access_flags.is_static();
1611 FieldAnnotationCollector parsed_annotations(_loader_data);
1612
1613 const u2 attributes_count = cfs->get_u2_fast();
1614 if (attributes_count > 0) {
1615 parse_field_attributes(cfs,
1616 attributes_count,
1617 is_static,
1618 signature_index,
1619 &constantvalue_index,
1620 &is_synthetic,
1621 &generic_signature_index,
1622 &parsed_annotations,
1623 CHECK);
1624
1625 if (parsed_annotations.field_annotations() != NULL) {
1626 if (_fields_annotations == NULL) {
1627 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1628 _loader_data, length, NULL,
1629 CHECK);
1630 }
1631 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1632 parsed_annotations.set_field_annotations(NULL);
1633 }
1634 if (parsed_annotations.field_type_annotations() != NULL) {
1635 if (_fields_type_annotations == NULL) {
1636 _fields_type_annotations =
1637 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1638 length,
1639 NULL,
1640 CHECK);
1641 }
1642 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1643 parsed_annotations.set_field_type_annotations(NULL);
1644 }
1645
1646 if (is_synthetic) {
1647 access_flags.set_is_synthetic();
1648 }
1649 if (generic_signature_index != 0) {
1650 access_flags.set_field_has_generic_signature();
1651 fa[generic_signature_slot] = generic_signature_index;
1652 generic_signature_slot ++;
1653 num_generic_signature ++;
1654 }
1655 }
1656
1657 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1658 field->initialize(access_flags.as_short(),
1659 name_index,
1660 signature_index,
1661 constantvalue_index);
1662 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1663
1664 // Update FieldAllocationCount for this kind of field
1665 fac->update(is_static, type, type == T_INLINE_TYPE);
1666
1667 // After field is initialized with type, we can augment it with aux info
1668 if (parsed_annotations.has_any_annotations()) {
1669 parsed_annotations.apply_to(field);
1670 if (field->is_contended()) {
1671 _has_contended_fields = true;
1672 }
1673 }
1674 }
1675
1676 int index = length;
1677 if (num_injected != 0) {
1678 for (int n = 0; n < num_injected; n++) {
1679 // Check for duplicates
1680 if (injected[n].may_be_java) {
1681 const Symbol* const name = injected[n].name();
1682 const Symbol* const signature = injected[n].signature();
1683 bool duplicate = false;
1684 for (int i = 0; i < length; i++) {
1685 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1686 if (name == cp->symbol_at(f->name_index()) &&
1687 signature == cp->symbol_at(f->signature_index())) {
1688 // Symbol is desclared in Java so skip this one
1689 duplicate = true;
1690 break;
1691 }
1692 }
1693 if (duplicate) {
1694 // These will be removed from the field array at the end
1695 continue;
1696 }
1697 }
1698
1699 // Injected field
1700 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1701 field->initialize((u2)JVM_ACC_FIELD_INTERNAL,
1702 (u2)(injected[n].name_index),
1703 (u2)(injected[n].signature_index),
1704 0);
1705
1706 const BasicType type = Signature::basic_type(injected[n].signature());
1707
1708 // Update FieldAllocationCount for this kind of field
1709 fac->update(false, type, false);
1710 index++;
1711 }
1712 }
1713
1714 if (is_inline_type) {
1715 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1716 field->initialize(JVM_ACC_FIELD_INTERNAL | JVM_ACC_STATIC,
1717 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(default_value_name)),
1718 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(object_signature)),
1719 0);
1720 const BasicType type = Signature::basic_type(vmSymbols::object_signature());
1721 fac->update(true, type, false);
1722 index++;
1723 }
1724
1725 if (is_inline_type && instance_fields_count == 0) {
1726 _is_empty_inline_type = true;
1727 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1728 field->initialize(JVM_ACC_FIELD_INTERNAL,
1729 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(empty_marker_name)),
1730 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(byte_signature)),
1731 0);
1732 const BasicType type = Signature::basic_type(vmSymbols::byte_signature());
1733 fac->update(false, type, false);
1734 index++;
1735 }
1736
1737 if (instance_fields_count > 0) {
1738 _has_nonstatic_fields = true;
1739 }
1740
1741 assert(NULL == _fields, "invariant");
1742
1743 _fields =
1744 MetadataFactory::new_array<u2>(_loader_data,
1745 index * FieldInfo::field_slots + num_generic_signature,
1746 CHECK);
1747 // Sometimes injected fields already exist in the Java source so
1748 // the fields array could be too long. In that case the
1749 // fields array is trimed. Also unused slots that were reserved
1750 // for generic signature indexes are discarded.
1751 {
1752 int i = 0;
1753 for (; i < index * FieldInfo::field_slots; i++) {
1754 _fields->at_put(i, fa[i]);
1755 }
1756 for (int j = total_fields * FieldInfo::field_slots;
1757 j < generic_signature_slot; j++) {
1758 _fields->at_put(i++, fa[j]);
1759 }
1760 assert(_fields->length() == i, "");
1761 }
1762
1763 if (_need_verify && length > 1) {
1764 // Check duplicated fields
1765 ResourceMark rm(THREAD);
1766 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1767 THREAD, NameSigHash*, HASH_ROW_SIZE);
1768 initialize_hashtable(names_and_sigs);
1769 bool dup = false;
1770 const Symbol* name = NULL;
1771 const Symbol* sig = NULL;
1772 {
1773 debug_only(NoSafepointVerifier nsv;)
1774 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1775 name = fs.name();
1776 sig = fs.signature();
1777 // If no duplicates, add name/signature in hashtable names_and_sigs.
1778 if (!put_after_lookup(name, sig, names_and_sigs)) {
1779 dup = true;
1780 break;
1781 }
1782 }
1783 }
1784 if (dup) {
1785 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1786 name->as_C_string(), sig->as_klass_external_name(), THREAD);
1787 }
1788 }
1789 }
1790
1791
1792 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1793 u4 code_length,
1794 u4 exception_table_length,
1795 TRAPS) {
1796 assert(cfs != NULL, "invariant");
1797
1798 const unsafe_u2* const exception_table_start = cfs->current();
1799 assert(exception_table_start != NULL, "null exception table");
1800
1801 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1802 // end_pc,
1803 // handler_pc,
1804 // catch_type_index
1805
1806 // Will check legal target after parsing code array in verifier.
1807 if (_need_verify) {
1808 for (unsigned int i = 0; i < exception_table_length; i++) {
1809 const u2 start_pc = cfs->get_u2_fast();
1810 const u2 end_pc = cfs->get_u2_fast();
1811 const u2 handler_pc = cfs->get_u2_fast();
1812 const u2 catch_type_index = cfs->get_u2_fast();
1813 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1814 "Illegal exception table range in class file %s",
1815 CHECK_NULL);
1816 guarantee_property(handler_pc < code_length,
1817 "Illegal exception table handler in class file %s",
1818 CHECK_NULL);
1819 if (catch_type_index != 0) {
1820 guarantee_property(valid_klass_reference_at(catch_type_index),
1821 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1822 }
1823 }
1824 } else {
1825 cfs->skip_u2_fast(exception_table_length * 4);
1826 }
1827 return exception_table_start;
1828 }
1829
1830 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1831 u4 code_length,
1832 CompressedLineNumberWriteStream**const write_stream,
1833 TRAPS) {
1834
1835 const ClassFileStream* const cfs = _stream;
1836 unsigned int num_entries = cfs->get_u2(CHECK);
1837
1838 // Each entry is a u2 start_pc, and a u2 line_number
1839 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1840
1841 // Verify line number attribute and table length
1842 check_property(
1843 code_attribute_length == sizeof(u2) + length_in_bytes,
1844 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1845
1846 cfs->guarantee_more(length_in_bytes, CHECK);
1847
1848 if ((*write_stream) == NULL) {
1849 if (length_in_bytes > fixed_buffer_size) {
1850 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1851 } else {
1852 (*write_stream) = new CompressedLineNumberWriteStream(
1853 _linenumbertable_buffer, fixed_buffer_size);
1854 }
1855 }
1856
1857 while (num_entries-- > 0) {
1858 const u2 bci = cfs->get_u2_fast(); // start_pc
1859 const u2 line = cfs->get_u2_fast(); // line_number
1860 guarantee_property(bci < code_length,
1861 "Invalid pc in LineNumberTable in class file %s", CHECK);
1862 (*write_stream)->write_pair(bci, line);
1863 }
1864 }
1865
1866
1867 class LVT_Hash : public AllStatic {
1868 public:
1869
1870 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1871 /*
1872 * 3-tuple start_bci/length/slot has to be unique key,
1873 * so the following comparison seems to be redundant:
1874 * && elem->name_cp_index == entry->_elem->name_cp_index
1875 */
1876 return (e0.start_bci == e1.start_bci &&
1877 e0.length == e1.length &&
1878 e0.name_cp_index == e1.name_cp_index &&
1879 e0.slot == e1.slot);
1880 }
1881
1882 static unsigned int hash(LocalVariableTableElement const& e0) {
1883 unsigned int raw_hash = e0.start_bci;
1884
1885 raw_hash = e0.length + raw_hash * 37;
1886 raw_hash = e0.name_cp_index + raw_hash * 37;
1887 raw_hash = e0.slot + raw_hash * 37;
1888
1889 return raw_hash;
1890 }
1891 };
1892
1893
1894 // Class file LocalVariableTable elements.
1895 class Classfile_LVT_Element {
1896 public:
1897 u2 start_bci;
1898 u2 length;
1899 u2 name_cp_index;
1900 u2 descriptor_cp_index;
1901 u2 slot;
1902 };
1903
1904 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1905 LocalVariableTableElement* const lvt) {
1906 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1907 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1908 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1909 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1910 lvt->signature_cp_index = 0;
1911 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1912 }
1913
1914 // Function is used to parse both attributes:
1915 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1916 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1917 u4 code_length,
1918 u2 max_locals,
1919 u4 code_attribute_length,
1920 u2* const localvariable_table_length,
1921 bool isLVTT,
1922 TRAPS) {
1923 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1924 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1925 const unsigned int size =
1926 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1927
1928 const ConstantPool* const cp = _cp;
1929
1930 // Verify local variable table attribute has right length
1931 if (_need_verify) {
1932 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1933 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1934 }
1935
1936 const unsafe_u2* const localvariable_table_start = cfs->current();
1937 assert(localvariable_table_start != NULL, "null local variable table");
1938 if (!_need_verify) {
1939 cfs->skip_u2_fast(size);
1940 } else {
1941 cfs->guarantee_more(size * 2, CHECK_NULL);
1942 for(int i = 0; i < (*localvariable_table_length); i++) {
1943 const u2 start_pc = cfs->get_u2_fast();
1944 const u2 length = cfs->get_u2_fast();
1945 const u2 name_index = cfs->get_u2_fast();
1946 const u2 descriptor_index = cfs->get_u2_fast();
1947 const u2 index = cfs->get_u2_fast();
1948 // Assign to a u4 to avoid overflow
1949 const u4 end_pc = (u4)start_pc + (u4)length;
1950
1951 if (start_pc >= code_length) {
1952 classfile_parse_error(
1953 "Invalid start_pc %u in %s in class file %s",
1954 start_pc, tbl_name, THREAD);
1955 return NULL;
1956 }
1957 if (end_pc > code_length) {
1958 classfile_parse_error(
1959 "Invalid length %u in %s in class file %s",
1960 length, tbl_name, THREAD);
1961 return NULL;
1962 }
1963 const int cp_size = cp->length();
1964 guarantee_property(valid_symbol_at(name_index),
1965 "Name index %u in %s has bad constant type in class file %s",
1966 name_index, tbl_name, CHECK_NULL);
1967 guarantee_property(valid_symbol_at(descriptor_index),
1968 "Signature index %u in %s has bad constant type in class file %s",
1969 descriptor_index, tbl_name, CHECK_NULL);
1970
1971 const Symbol* const name = cp->symbol_at(name_index);
1972 const Symbol* const sig = cp->symbol_at(descriptor_index);
1973 verify_legal_field_name(name, CHECK_NULL);
1974 u2 extra_slot = 0;
1975 if (!isLVTT) {
1976 verify_legal_field_signature(name, sig, CHECK_NULL);
1977
1978 // 4894874: check special cases for double and long local variables
1979 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1980 sig == vmSymbols::type_signature(T_LONG)) {
1981 extra_slot = 1;
1982 }
1983 }
1984 guarantee_property((index + extra_slot) < max_locals,
1985 "Invalid index %u in %s in class file %s",
1986 index, tbl_name, CHECK_NULL);
1987 }
1988 }
1989 return localvariable_table_start;
1990 }
1991
1992 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1993 u4 code_attribute_length,
1994 bool need_verify,
1995 TRAPS) {
1996 assert(cfs != NULL, "invariant");
1997
1998 if (0 == code_attribute_length) {
1999 return NULL;
2000 }
2001
2002 const u1* const stackmap_table_start = cfs->current();
2003 assert(stackmap_table_start != NULL, "null stackmap table");
2004
2005 // check code_attribute_length first
2006 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2007
2008 if (!need_verify && !DumpSharedSpaces) {
2009 return NULL;
2010 }
2011 return stackmap_table_start;
2012 }
2013
2014 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2015 u2* const checked_exceptions_length,
2016 u4 method_attribute_length,
2017 TRAPS) {
2018 assert(cfs != NULL, "invariant");
2019 assert(checked_exceptions_length != NULL, "invariant");
2020
2021 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2022 *checked_exceptions_length = cfs->get_u2_fast();
2023 const unsigned int size =
2024 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2025 const unsafe_u2* const checked_exceptions_start = cfs->current();
2026 assert(checked_exceptions_start != NULL, "null checked exceptions");
2027 if (!_need_verify) {
2028 cfs->skip_u2_fast(size);
2029 } else {
2030 // Verify each value in the checked exception table
2031 u2 checked_exception;
2032 const u2 len = *checked_exceptions_length;
2033 cfs->guarantee_more(2 * len, CHECK_NULL);
2034 for (int i = 0; i < len; i++) {
2035 checked_exception = cfs->get_u2_fast();
2036 check_property(
2037 valid_klass_reference_at(checked_exception),
2038 "Exception name has bad type at constant pool %u in class file %s",
2039 checked_exception, CHECK_NULL);
2040 }
2041 }
2042 // check exceptions attribute length
2043 if (_need_verify) {
2044 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2045 sizeof(u2) * size),
2046 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2047 }
2048 return checked_exceptions_start;
2049 }
2050
2051 void ClassFileParser::throwIllegalSignature(const char* type,
2052 const Symbol* name,
2053 const Symbol* sig,
2054 TRAPS) const {
2055 assert(name != NULL, "invariant");
2056 assert(sig != NULL, "invariant");
2057
2058 const char* class_note = "";
2059 if (is_inline_type() && name == vmSymbols::object_initializer_name()) {
2060 class_note = " (an inline class)";
2061 }
2062
2063 ResourceMark rm(THREAD);
2064 Exceptions::fthrow(THREAD_AND_LOCATION,
2065 vmSymbols::java_lang_ClassFormatError(),
2066 "%s \"%s\" in class %s%s has illegal signature \"%s\"", type,
2067 name->as_C_string(), _class_name->as_C_string(), class_note, sig->as_C_string());
2068 }
2069
2070 AnnotationCollector::ID
2071 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2072 const Symbol* name,
2073 const bool can_access_vm_annotations) {
2074 const vmSymbolID sid = vmSymbols::find_sid(name);
2075 // Privileged code can use all annotations. Other code silently drops some.
2076 const bool privileged = loader_data->is_boot_class_loader_data() ||
2077 loader_data->is_platform_class_loader_data() ||
2078 can_access_vm_annotations;
2079 switch (sid) {
2080 case VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2081 if (_location != _in_method) break; // only allow for methods
2082 if (!privileged) break; // only allow in privileged code
2083 return _method_CallerSensitive;
2084 }
2085 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2086 if (_location != _in_method) break; // only allow for methods
2087 if (!privileged) break; // only allow in privileged code
2088 return _method_ForceInline;
2089 }
2090 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2091 if (_location != _in_method) break; // only allow for methods
2092 if (!privileged) break; // only allow in privileged code
2093 return _method_DontInline;
2094 }
2095 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2096 if (_location != _in_method) break; // only allow for methods
2097 if (!privileged) break; // only allow in privileged code
2098 return _method_InjectedProfile;
2099 }
2100 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2101 if (_location != _in_method) break; // only allow for methods
2102 if (!privileged) break; // only allow in privileged code
2103 return _method_LambdaForm_Compiled;
2104 }
2105 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2106 if (_location != _in_method) break; // only allow for methods
2107 if (!privileged) break; // only allow in privileged code
2108 return _method_Hidden;
2109 }
2110 case VM_SYMBOL_ENUM_NAME(jdk_internal_misc_Scoped_signature): {
2111 if (_location != _in_method) break; // only allow for methods
2112 if (!privileged) break; // only allow in privileged code
2113 return _method_Scoped;
2114 }
2115 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_IntrinsicCandidate_signature): {
2116 if (_location != _in_method) break; // only allow for methods
2117 if (!privileged) break; // only allow in privileged code
2118 return _method_IntrinsicCandidate;
2119 }
2120 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2121 if (_location != _in_field) break; // only allow for fields
2122 if (!privileged) break; // only allow in privileged code
2123 return _field_Stable;
2124 }
2125 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2126 if (_location != _in_field && _location != _in_class) {
2127 break; // only allow for fields and classes
2128 }
2129 if (!EnableContended || (RestrictContended && !privileged)) {
2130 break; // honor privileges
2131 }
2132 return _jdk_internal_vm_annotation_Contended;
2133 }
2134 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2135 if (_location != _in_method) break; // only allow for methods
2136 if (RestrictReservedStack && !privileged) break; // honor privileges
2137 return _jdk_internal_vm_annotation_ReservedStackAccess;
2138 }
2139 case VM_SYMBOL_ENUM_NAME(jdk_internal_ValueBased_signature): {
2140 if (_location != _in_class) break; // only allow for classes
2141 if (!privileged) break; // only allow in priviledged code
2142 return _jdk_internal_ValueBased;
2143 }
2144 default: {
2145 break;
2146 }
2147 }
2148 return AnnotationCollector::_unknown;
2149 }
2150
2151 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2152 if (is_contended())
2153 f->set_contended_group(contended_group());
2154 if (is_stable())
2155 f->set_stable(true);
2156 }
2157
2158 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2159 // If there's an error deallocate metadata for field annotations
2160 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2161 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2162 }
2163
2164 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2165 if (has_annotation(_method_CallerSensitive))
2166 m->set_caller_sensitive(true);
2167 if (has_annotation(_method_ForceInline))
2168 m->set_force_inline(true);
2169 if (has_annotation(_method_DontInline))
2170 m->set_dont_inline(true);
2171 if (has_annotation(_method_InjectedProfile))
2172 m->set_has_injected_profile(true);
2173 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2174 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2175 if (has_annotation(_method_Hidden))
2176 m->set_hidden(true);
2177 if (has_annotation(_method_Scoped))
2178 m->set_scoped(true);
2179 if (has_annotation(_method_IntrinsicCandidate) && !m->is_synthetic())
2180 m->set_intrinsic_candidate(true);
2181 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2182 m->set_has_reserved_stack_access(true);
2183 }
2184
2185 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2186 assert(ik != NULL, "invariant");
2187 if (has_annotation(_jdk_internal_vm_annotation_Contended)) {
2188 ik->set_is_contended(is_contended());
2189 }
2190 if (has_annotation(_jdk_internal_ValueBased)) {
2191 ik->set_has_value_based_class_annotation();
2192 if (DiagnoseSyncOnValueBasedClasses) {
2193 ik->set_is_value_based();
2194 }
2195 }
2196 }
2197
2198 #define MAX_ARGS_SIZE 255
2199 #define MAX_CODE_SIZE 65535
2200 #define INITIAL_MAX_LVT_NUMBER 256
2201
2202 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2203 *
2204 * Rules for LVT's and LVTT's are:
2205 * - There can be any number of LVT's and LVTT's.
2206 * - If there are n LVT's, it is the same as if there was just
2207 * one LVT containing all the entries from the n LVT's.
2208 * - There may be no more than one LVT entry per local variable.
2209 * Two LVT entries are 'equal' if these fields are the same:
2210 * start_pc, length, name, slot
2211 * - There may be no more than one LVTT entry per each LVT entry.
2212 * Each LVTT entry has to match some LVT entry.
2213 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2214 */
2215 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2216 int lvt_cnt,
2217 u2* const localvariable_table_length,
2218 const unsafe_u2** const localvariable_table_start,
2219 int lvtt_cnt,
2220 u2* const localvariable_type_table_length,
2221 const unsafe_u2** const localvariable_type_table_start,
2222 TRAPS) {
2223
2224 ResourceMark rm(THREAD);
2225
2226 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2227 256, ResourceObj::RESOURCE_AREA, mtInternal,
2228 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2229
2230 LVT_HashTable* const table = new LVT_HashTable();
2231
2232 // To fill LocalVariableTable in
2233 const Classfile_LVT_Element* cf_lvt;
2234 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2235
2236 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2237 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2238 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2239 copy_lvt_element(&cf_lvt[idx], lvt);
2240 // If no duplicates, add LVT elem in hashtable.
2241 if (table->put(*lvt, lvt) == false
2242 && _need_verify
2243 && _major_version >= JAVA_1_5_VERSION) {
2244 classfile_parse_error("Duplicated LocalVariableTable attribute "
2245 "entry for '%s' in class file %s",
2246 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2247 THREAD);
2248 return;
2249 }
2250 }
2251 }
2252
2253 // To merge LocalVariableTable and LocalVariableTypeTable
2254 const Classfile_LVT_Element* cf_lvtt;
2255 LocalVariableTableElement lvtt_elem;
2256
2257 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2258 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2259 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2260 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2261 LocalVariableTableElement** entry = table->get(lvtt_elem);
2262 if (entry == NULL) {
2263 if (_need_verify) {
2264 classfile_parse_error("LVTT entry for '%s' in class file %s "
2265 "does not match any LVT entry",
2266 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2267 THREAD);
2268 return;
2269 }
2270 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2271 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2272 "entry for '%s' in class file %s",
2273 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2274 THREAD);
2275 return;
2276 } else {
2277 // to add generic signatures into LocalVariableTable
2278 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2279 }
2280 }
2281 }
2282 }
2283
2284
2285 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2286 const u1* runtime_visible_annotations,
2287 int runtime_visible_annotations_length,
2288 const u1* runtime_invisible_annotations,
2289 int runtime_invisible_annotations_length,
2290 const u1* runtime_visible_parameter_annotations,
2291 int runtime_visible_parameter_annotations_length,
2292 const u1* runtime_invisible_parameter_annotations,
2293 int runtime_invisible_parameter_annotations_length,
2294 const u1* runtime_visible_type_annotations,
2295 int runtime_visible_type_annotations_length,
2296 const u1* runtime_invisible_type_annotations,
2297 int runtime_invisible_type_annotations_length,
2298 const u1* annotation_default,
2299 int annotation_default_length,
2300 TRAPS) {
2301
2302 AnnotationArray* a;
2303
2304 if (runtime_visible_annotations_length +
2305 runtime_invisible_annotations_length > 0) {
2306 a = assemble_annotations(runtime_visible_annotations,
2307 runtime_visible_annotations_length,
2308 runtime_invisible_annotations,
2309 runtime_invisible_annotations_length,
2310 CHECK);
2311 cm->set_method_annotations(a);
2312 }
2313
2314 if (runtime_visible_parameter_annotations_length +
2315 runtime_invisible_parameter_annotations_length > 0) {
2316 a = assemble_annotations(runtime_visible_parameter_annotations,
2317 runtime_visible_parameter_annotations_length,
2318 runtime_invisible_parameter_annotations,
2319 runtime_invisible_parameter_annotations_length,
2320 CHECK);
2321 cm->set_parameter_annotations(a);
2322 }
2323
2324 if (annotation_default_length > 0) {
2325 a = assemble_annotations(annotation_default,
2326 annotation_default_length,
2327 NULL,
2328 0,
2329 CHECK);
2330 cm->set_default_annotations(a);
2331 }
2332
2333 if (runtime_visible_type_annotations_length +
2334 runtime_invisible_type_annotations_length > 0) {
2335 a = assemble_annotations(runtime_visible_type_annotations,
2336 runtime_visible_type_annotations_length,
2337 runtime_invisible_type_annotations,
2338 runtime_invisible_type_annotations_length,
2339 CHECK);
2340 cm->set_type_annotations(a);
2341 }
2342 }
2343
2344
2345 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2346 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2347 // Method* to save footprint, so we only know the size of the resulting Method* when the
2348 // entire method attribute is parsed.
2349 //
2350 // The promoted_flags parameter is used to pass relevant access_flags
2351 // from the method back up to the containing klass. These flag values
2352 // are added to klass's access_flags.
2353
2354 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2355 bool is_interface,
2356 bool is_inline_type,
2357 const ConstantPool* cp,
2358 AccessFlags* const promoted_flags,
2359 TRAPS) {
2360 assert(cfs != NULL, "invariant");
2361 assert(cp != NULL, "invariant");
2362 assert(promoted_flags != NULL, "invariant");
2363
2364 ResourceMark rm(THREAD);
2365 // Parse fixed parts:
2366 // access_flags, name_index, descriptor_index, attributes_count
2367 cfs->guarantee_more(8, CHECK_NULL);
2368
2369 int flags = cfs->get_u2_fast();
2370 const u2 name_index = cfs->get_u2_fast();
2371 const int cp_size = cp->length();
2372 check_property(
2373 valid_symbol_at(name_index),
2374 "Illegal constant pool index %u for method name in class file %s",
2375 name_index, CHECK_NULL);
2376 const Symbol* const name = cp->symbol_at(name_index);
2377 verify_legal_method_name(name, CHECK_NULL);
2378
2379 const u2 signature_index = cfs->get_u2_fast();
2380 guarantee_property(
2381 valid_symbol_at(signature_index),
2382 "Illegal constant pool index %u for method signature in class file %s",
2383 signature_index, CHECK_NULL);
2384 const Symbol* const signature = cp->symbol_at(signature_index);
2385
2386 if (name == vmSymbols::class_initializer_name()) {
2387 // We ignore the other access flags for a valid class initializer.
2388 // (JVM Spec 2nd ed., chapter 4.6)
2389 if (_major_version < 51) { // backward compatibility
2390 flags = JVM_ACC_STATIC;
2391 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2392 flags &= JVM_ACC_STATIC | (_major_version <= JAVA_16_VERSION ? JVM_ACC_STRICT : 0);
2393 } else {
2394 classfile_parse_error("Method <clinit> is not static in class file %s", THREAD);
2395 return NULL;
2396 }
2397 } else {
2398 verify_legal_method_modifiers(flags, is_interface, is_inline_type, name, CHECK_NULL);
2399 }
2400
2401 if (name == vmSymbols::object_initializer_name()) {
2402 if (is_interface) {
2403 classfile_parse_error("Interface cannot have a method named <init>, class file %s", THREAD);
2404 return NULL;
2405 } else if (!is_inline_type && signature->is_void_method_signature()) {
2406 // OK, a constructor
2407 } else if (is_inline_type && !signature->is_void_method_signature()) {
2408 // also OK, a static factory, as long as the return value is good
2409 bool ok = false;
2410 SignatureStream ss((Symbol*) signature, true);
2411 while (!ss.at_return_type()) ss.next();
2412 if (ss.is_reference()) {
2413 Symbol* ret = ss.as_symbol();
2414 const Symbol* required = class_name();
2415 if (is_hidden()) {
2416 // The original class name in hidden classes gets changed. So using
2417 // the original name in the return type is no longer valid.
2418 // Note that expecting the return type for inline hidden class factory
2419 // methods to be java.lang.Object works around a JVM Spec issue for
2420 // hidden classes.
2421 required = vmSymbols::java_lang_Object();
2422 }
2423 ok = (ret == required);
2424 }
2425 if (!ok) {
2426 throwIllegalSignature("Method", name, signature, CHECK_0);
2427 }
2428 } else {
2429 // not OK, so throw the same error as in verify_legal_method_signature.
2430 throwIllegalSignature("Method", name, signature, CHECK_0);
2431 }
2432 // A declared <init> method must always be either a non-static
2433 // object constructor, with a void return, or else it must be a
2434 // static factory method, with a non-void return. No other
2435 // definition of <init> is possible.
2436 //
2437 // The verifier (in verify_invoke_instructions) will inspect the
2438 // signature of any attempt to invoke <init>, and ensures that it
2439 // returns non-void if and only if it is being invoked by
2440 // invokestatic, and void if and only if it is being invoked by
2441 // invokespecial.
2442 //
2443 // When a symbolic reference to <init> is resolved for a
2444 // particular invocation mode (special or static), the mode is
2445 // matched to the JVM_ACC_STATIC modifier of the <init> method.
2446 // Thus, it is impossible to statically invoke a constructor, and
2447 // impossible to "new + invokespecial" a static factory, either
2448 // through bytecode or through reflection.
2449 }
2450
2451 int args_size = -1; // only used when _need_verify is true
2452 if (_need_verify) {
2453 verify_legal_name_with_signature(name, signature, CHECK_NULL);
2454 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2455 verify_legal_method_signature(name, signature, CHECK_NULL);
2456 if (args_size > MAX_ARGS_SIZE) {
2457 classfile_parse_error("Too many arguments in method signature in class file %s", THREAD);
2458 return NULL;
2459 }
2460 }
2461
2462 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2463
2464 // Default values for code and exceptions attribute elements
2465 u2 max_stack = 0;
2466 u2 max_locals = 0;
2467 u4 code_length = 0;
2468 const u1* code_start = 0;
2469 u2 exception_table_length = 0;
2470 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2471 Array<int>* exception_handlers = Universe::the_empty_int_array();
2472 u2 checked_exceptions_length = 0;
2473 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2474 CompressedLineNumberWriteStream* linenumber_table = NULL;
2475 int linenumber_table_length = 0;
2476 int total_lvt_length = 0;
2477 u2 lvt_cnt = 0;
2478 u2 lvtt_cnt = 0;
2479 bool lvt_allocated = false;
2480 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2481 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2482 u2* localvariable_table_length = NULL;
2483 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2484 u2* localvariable_type_table_length = NULL;
2485 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2486 int method_parameters_length = -1;
2487 const u1* method_parameters_data = NULL;
2488 bool method_parameters_seen = false;
2489 bool parsed_code_attribute = false;
2490 bool parsed_checked_exceptions_attribute = false;
2491 bool parsed_stackmap_attribute = false;
2492 // stackmap attribute - JDK1.5
2493 const u1* stackmap_data = NULL;
2494 int stackmap_data_length = 0;
2495 u2 generic_signature_index = 0;
2496 MethodAnnotationCollector parsed_annotations;
2497 const u1* runtime_visible_annotations = NULL;
2498 int runtime_visible_annotations_length = 0;
2499 const u1* runtime_invisible_annotations = NULL;
2500 int runtime_invisible_annotations_length = 0;
2501 const u1* runtime_visible_parameter_annotations = NULL;
2502 int runtime_visible_parameter_annotations_length = 0;
2503 const u1* runtime_invisible_parameter_annotations = NULL;
2504 int runtime_invisible_parameter_annotations_length = 0;
2505 const u1* runtime_visible_type_annotations = NULL;
2506 int runtime_visible_type_annotations_length = 0;
2507 const u1* runtime_invisible_type_annotations = NULL;
2508 int runtime_invisible_type_annotations_length = 0;
2509 bool runtime_invisible_annotations_exists = false;
2510 bool runtime_invisible_type_annotations_exists = false;
2511 bool runtime_invisible_parameter_annotations_exists = false;
2512 const u1* annotation_default = NULL;
2513 int annotation_default_length = 0;
2514
2515 // Parse code and exceptions attribute
2516 u2 method_attributes_count = cfs->get_u2_fast();
2517 while (method_attributes_count--) {
2518 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2519 const u2 method_attribute_name_index = cfs->get_u2_fast();
2520 const u4 method_attribute_length = cfs->get_u4_fast();
2521 check_property(
2522 valid_symbol_at(method_attribute_name_index),
2523 "Invalid method attribute name index %u in class file %s",
2524 method_attribute_name_index, CHECK_NULL);
2525
2526 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2527 if (method_attribute_name == vmSymbols::tag_code()) {
2528 // Parse Code attribute
2529 if (_need_verify) {
2530 guarantee_property(
2531 !access_flags.is_native() && !access_flags.is_abstract(),
2532 "Code attribute in native or abstract methods in class file %s",
2533 CHECK_NULL);
2534 }
2535 if (parsed_code_attribute) {
2536 classfile_parse_error("Multiple Code attributes in class file %s",
2537 THREAD);
2538 return NULL;
2539 }
2540 parsed_code_attribute = true;
2541
2542 // Stack size, locals size, and code size
2543 cfs->guarantee_more(8, CHECK_NULL);
2544 max_stack = cfs->get_u2_fast();
2545 max_locals = cfs->get_u2_fast();
2546 code_length = cfs->get_u4_fast();
2547 if (_need_verify) {
2548 guarantee_property(args_size <= max_locals,
2549 "Arguments can't fit into locals in class file %s",
2550 CHECK_NULL);
2551 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2552 "Invalid method Code length %u in class file %s",
2553 code_length, CHECK_NULL);
2554 }
2555 // Code pointer
2556 code_start = cfs->current();
2557 assert(code_start != NULL, "null code start");
2558 cfs->guarantee_more(code_length, CHECK_NULL);
2559 cfs->skip_u1_fast(code_length);
2560
2561 // Exception handler table
2562 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2563 exception_table_length = cfs->get_u2_fast();
2564 if (exception_table_length > 0) {
2565 exception_table_start = parse_exception_table(cfs,
2566 code_length,
2567 exception_table_length,
2568 CHECK_NULL);
2569 }
2570
2571 // Parse additional attributes in code attribute
2572 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2573 u2 code_attributes_count = cfs->get_u2_fast();
2574
2575 unsigned int calculated_attribute_length = 0;
2576
2577 calculated_attribute_length =
2578 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2579 calculated_attribute_length +=
2580 code_length +
2581 sizeof(exception_table_length) +
2582 sizeof(code_attributes_count) +
2583 exception_table_length *
2584 ( sizeof(u2) + // start_pc
2585 sizeof(u2) + // end_pc
2586 sizeof(u2) + // handler_pc
2587 sizeof(u2) ); // catch_type_index
2588
2589 while (code_attributes_count--) {
2590 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2591 const u2 code_attribute_name_index = cfs->get_u2_fast();
2592 const u4 code_attribute_length = cfs->get_u4_fast();
2593 calculated_attribute_length += code_attribute_length +
2594 sizeof(code_attribute_name_index) +
2595 sizeof(code_attribute_length);
2596 check_property(valid_symbol_at(code_attribute_name_index),
2597 "Invalid code attribute name index %u in class file %s",
2598 code_attribute_name_index,
2599 CHECK_NULL);
2600 if (LoadLineNumberTables &&
2601 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2602 // Parse and compress line number table
2603 parse_linenumber_table(code_attribute_length,
2604 code_length,
2605 &linenumber_table,
2606 CHECK_NULL);
2607
2608 } else if (LoadLocalVariableTables &&
2609 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2610 // Parse local variable table
2611 if (!lvt_allocated) {
2612 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2613 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2614 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2615 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2616 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2617 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2618 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2619 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2620 lvt_allocated = true;
2621 }
2622 if (lvt_cnt == max_lvt_cnt) {
2623 max_lvt_cnt <<= 1;
2624 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2625 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2626 }
2627 localvariable_table_start[lvt_cnt] =
2628 parse_localvariable_table(cfs,
2629 code_length,
2630 max_locals,
2631 code_attribute_length,
2632 &localvariable_table_length[lvt_cnt],
2633 false, // is not LVTT
2634 CHECK_NULL);
2635 total_lvt_length += localvariable_table_length[lvt_cnt];
2636 lvt_cnt++;
2637 } else if (LoadLocalVariableTypeTables &&
2638 _major_version >= JAVA_1_5_VERSION &&
2639 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2640 if (!lvt_allocated) {
2641 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2642 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2643 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2644 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2645 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2646 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2647 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2648 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2649 lvt_allocated = true;
2650 }
2651 // Parse local variable type table
2652 if (lvtt_cnt == max_lvtt_cnt) {
2653 max_lvtt_cnt <<= 1;
2654 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2655 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2656 }
2657 localvariable_type_table_start[lvtt_cnt] =
2658 parse_localvariable_table(cfs,
2659 code_length,
2660 max_locals,
2661 code_attribute_length,
2662 &localvariable_type_table_length[lvtt_cnt],
2663 true, // is LVTT
2664 CHECK_NULL);
2665 lvtt_cnt++;
2666 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2667 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2668 // Stack map is only needed by the new verifier in JDK1.5.
2669 if (parsed_stackmap_attribute) {
2670 classfile_parse_error("Multiple StackMapTable attributes in class file %s", THREAD);
2671 return NULL;
2672 }
2673 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2674 stackmap_data_length = code_attribute_length;
2675 parsed_stackmap_attribute = true;
2676 } else {
2677 // Skip unknown attributes
2678 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2679 }
2680 }
2681 // check method attribute length
2682 if (_need_verify) {
2683 guarantee_property(method_attribute_length == calculated_attribute_length,
2684 "Code segment has wrong length in class file %s",
2685 CHECK_NULL);
2686 }
2687 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2688 // Parse Exceptions attribute
2689 if (parsed_checked_exceptions_attribute) {
2690 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2691 THREAD);
2692 return NULL;
2693 }
2694 parsed_checked_exceptions_attribute = true;
2695 checked_exceptions_start =
2696 parse_checked_exceptions(cfs,
2697 &checked_exceptions_length,
2698 method_attribute_length,
2699 CHECK_NULL);
2700 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2701 // reject multiple method parameters
2702 if (method_parameters_seen) {
2703 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2704 THREAD);
2705 return NULL;
2706 }
2707 method_parameters_seen = true;
2708 method_parameters_length = cfs->get_u1_fast();
2709 const u2 real_length = (method_parameters_length * 4u) + 1u;
2710 if (method_attribute_length != real_length) {
2711 classfile_parse_error(
2712 "Invalid MethodParameters method attribute length %u in class file",
2713 method_attribute_length, THREAD);
2714 return NULL;
2715 }
2716 method_parameters_data = cfs->current();
2717 cfs->skip_u2_fast(method_parameters_length);
2718 cfs->skip_u2_fast(method_parameters_length);
2719 // ignore this attribute if it cannot be reflected
2720 if (!vmClasses::Parameter_klass_loaded())
2721 method_parameters_length = -1;
2722 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2723 if (method_attribute_length != 0) {
2724 classfile_parse_error(
2725 "Invalid Synthetic method attribute length %u in class file %s",
2726 method_attribute_length, THREAD);
2727 return NULL;
2728 }
2729 // Should we check that there hasn't already been a synthetic attribute?
2730 access_flags.set_is_synthetic();
2731 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2732 if (method_attribute_length != 0) {
2733 classfile_parse_error(
2734 "Invalid Deprecated method attribute length %u in class file %s",
2735 method_attribute_length, THREAD);
2736 return NULL;
2737 }
2738 } else if (_major_version >= JAVA_1_5_VERSION) {
2739 if (method_attribute_name == vmSymbols::tag_signature()) {
2740 if (generic_signature_index != 0) {
2741 classfile_parse_error(
2742 "Multiple Signature attributes for method in class file %s",
2743 THREAD);
2744 return NULL;
2745 }
2746 if (method_attribute_length != 2) {
2747 classfile_parse_error(
2748 "Invalid Signature attribute length %u in class file %s",
2749 method_attribute_length, THREAD);
2750 return NULL;
2751 }
2752 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2753 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2754 if (runtime_visible_annotations != NULL) {
2755 classfile_parse_error(
2756 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2757 THREAD);
2758 return NULL;
2759 }
2760 runtime_visible_annotations_length = method_attribute_length;
2761 runtime_visible_annotations = cfs->current();
2762 assert(runtime_visible_annotations != NULL, "null visible annotations");
2763 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2764 parse_annotations(cp,
2765 runtime_visible_annotations,
2766 runtime_visible_annotations_length,
2767 &parsed_annotations,
2768 _loader_data,
2769 _can_access_vm_annotations);
2770 cfs->skip_u1_fast(runtime_visible_annotations_length);
2771 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2772 if (runtime_invisible_annotations_exists) {
2773 classfile_parse_error(
2774 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2775 THREAD);
2776 return NULL;
2777 }
2778 runtime_invisible_annotations_exists = true;
2779 if (PreserveAllAnnotations) {
2780 runtime_invisible_annotations_length = method_attribute_length;
2781 runtime_invisible_annotations = cfs->current();
2782 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2783 }
2784 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2785 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2786 if (runtime_visible_parameter_annotations != NULL) {
2787 classfile_parse_error(
2788 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2789 THREAD);
2790 return NULL;
2791 }
2792 runtime_visible_parameter_annotations_length = method_attribute_length;
2793 runtime_visible_parameter_annotations = cfs->current();
2794 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2795 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2796 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2797 if (runtime_invisible_parameter_annotations_exists) {
2798 classfile_parse_error(
2799 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2800 THREAD);
2801 return NULL;
2802 }
2803 runtime_invisible_parameter_annotations_exists = true;
2804 if (PreserveAllAnnotations) {
2805 runtime_invisible_parameter_annotations_length = method_attribute_length;
2806 runtime_invisible_parameter_annotations = cfs->current();
2807 assert(runtime_invisible_parameter_annotations != NULL,
2808 "null invisible parameter annotations");
2809 }
2810 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2811 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2812 if (annotation_default != NULL) {
2813 classfile_parse_error(
2814 "Multiple AnnotationDefault attributes for method in class file %s",
2815 THREAD);
2816 return NULL;
2817 }
2818 annotation_default_length = method_attribute_length;
2819 annotation_default = cfs->current();
2820 assert(annotation_default != NULL, "null annotation default");
2821 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2822 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2823 if (runtime_visible_type_annotations != NULL) {
2824 classfile_parse_error(
2825 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2826 THREAD);
2827 return NULL;
2828 }
2829 runtime_visible_type_annotations_length = method_attribute_length;
2830 runtime_visible_type_annotations = cfs->current();
2831 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2832 // No need for the VM to parse Type annotations
2833 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2834 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2835 if (runtime_invisible_type_annotations_exists) {
2836 classfile_parse_error(
2837 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2838 THREAD);
2839 return NULL;
2840 } else {
2841 runtime_invisible_type_annotations_exists = true;
2842 }
2843 if (PreserveAllAnnotations) {
2844 runtime_invisible_type_annotations_length = method_attribute_length;
2845 runtime_invisible_type_annotations = cfs->current();
2846 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2847 }
2848 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2849 } else {
2850 // Skip unknown attributes
2851 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2852 }
2853 } else {
2854 // Skip unknown attributes
2855 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2856 }
2857 }
2858
2859 if (linenumber_table != NULL) {
2860 linenumber_table->write_terminator();
2861 linenumber_table_length = linenumber_table->position();
2862 }
2863
2864 // Make sure there's at least one Code attribute in non-native/non-abstract method
2865 if (_need_verify) {
2866 guarantee_property(access_flags.is_native() ||
2867 access_flags.is_abstract() ||
2868 parsed_code_attribute,
2869 "Absent Code attribute in method that is not native or abstract in class file %s",
2870 CHECK_NULL);
2871 }
2872
2873 // All sizing information for a Method* is finally available, now create it
2874 InlineTableSizes sizes(
2875 total_lvt_length,
2876 linenumber_table_length,
2877 exception_table_length,
2878 checked_exceptions_length,
2879 method_parameters_length,
2880 generic_signature_index,
2881 runtime_visible_annotations_length +
2882 runtime_invisible_annotations_length,
2883 runtime_visible_parameter_annotations_length +
2884 runtime_invisible_parameter_annotations_length,
2885 runtime_visible_type_annotations_length +
2886 runtime_invisible_type_annotations_length,
2887 annotation_default_length,
2888 0);
2889
2890 Method* const m = Method::allocate(_loader_data,
2891 code_length,
2892 access_flags,
2893 &sizes,
2894 ConstMethod::NORMAL,
2895 CHECK_NULL);
2896
2897 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2898
2899 // Fill in information from fixed part (access_flags already set)
2900 m->set_constants(_cp);
2901 m->set_name_index(name_index);
2902 m->set_signature_index(signature_index);
2903 m->compute_from_signature(cp->symbol_at(signature_index));
2904 assert(args_size < 0 || args_size == m->size_of_parameters(), "");
2905
2906 // Fill in code attribute information
2907 m->set_max_stack(max_stack);
2908 m->set_max_locals(max_locals);
2909 if (stackmap_data != NULL) {
2910 m->constMethod()->copy_stackmap_data(_loader_data,
2911 (u1*)stackmap_data,
2912 stackmap_data_length,
2913 CHECK_NULL);
2914 }
2915
2916 // Copy byte codes
2917 m->set_code((u1*)code_start);
2918
2919 // Copy line number table
2920 if (linenumber_table != NULL) {
2921 memcpy(m->compressed_linenumber_table(),
2922 linenumber_table->buffer(),
2923 linenumber_table_length);
2924 }
2925
2926 // Copy exception table
2927 if (exception_table_length > 0) {
2928 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2929 m->exception_table_start(),
2930 exception_table_length * sizeof(ExceptionTableElement),
2931 sizeof(u2));
2932 }
2933
2934 // Copy method parameters
2935 if (method_parameters_length > 0) {
2936 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2937 for (int i = 0; i < method_parameters_length; i++) {
2938 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2939 method_parameters_data += 2;
2940 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2941 method_parameters_data += 2;
2942 }
2943 }
2944
2945 // Copy checked exceptions
2946 if (checked_exceptions_length > 0) {
2947 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2948 m->checked_exceptions_start(),
2949 checked_exceptions_length * sizeof(CheckedExceptionElement),
2950 sizeof(u2));
2951 }
2952
2953 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2954 if (total_lvt_length > 0) {
2955 promoted_flags->set_has_localvariable_table();
2956 copy_localvariable_table(m->constMethod(),
2957 lvt_cnt,
2958 localvariable_table_length,
2959 localvariable_table_start,
2960 lvtt_cnt,
2961 localvariable_type_table_length,
2962 localvariable_type_table_start,
2963 CHECK_NULL);
2964 }
2965
2966 if (parsed_annotations.has_any_annotations())
2967 parsed_annotations.apply_to(methodHandle(THREAD, m));
2968
2969 if (is_hidden()) { // Mark methods in hidden classes as 'hidden'.
2970 m->set_hidden(true);
2971 }
2972
2973 // Copy annotations
2974 copy_method_annotations(m->constMethod(),
2975 runtime_visible_annotations,
2976 runtime_visible_annotations_length,
2977 runtime_invisible_annotations,
2978 runtime_invisible_annotations_length,
2979 runtime_visible_parameter_annotations,
2980 runtime_visible_parameter_annotations_length,
2981 runtime_invisible_parameter_annotations,
2982 runtime_invisible_parameter_annotations_length,
2983 runtime_visible_type_annotations,
2984 runtime_visible_type_annotations_length,
2985 runtime_invisible_type_annotations,
2986 runtime_invisible_type_annotations_length,
2987 annotation_default,
2988 annotation_default_length,
2989 CHECK_NULL);
2990
2991 if (name == vmSymbols::finalize_method_name() &&
2992 signature == vmSymbols::void_method_signature()) {
2993 if (m->is_empty_method()) {
2994 _has_empty_finalizer = true;
2995 } else {
2996 _has_finalizer = true;
2997 }
2998 }
2999 if (name == vmSymbols::object_initializer_name() &&
3000 signature == vmSymbols::void_method_signature() &&
3001 m->is_vanilla_constructor()) {
3002 _has_vanilla_constructor = true;
3003 }
3004
3005 NOT_PRODUCT(m->verify());
3006 return m;
3007 }
3008
3009
3010 // The promoted_flags parameter is used to pass relevant access_flags
3011 // from the methods back up to the containing klass. These flag values
3012 // are added to klass's access_flags.
3013 // Side-effects: populates the _methods field in the parser
3014 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
3015 bool is_interface,
3016 bool is_inline_type,
3017 AccessFlags* promoted_flags,
3018 bool* has_final_method,
3019 bool* declares_nonstatic_concrete_methods,
3020 TRAPS) {
3021 assert(cfs != NULL, "invariant");
3022 assert(promoted_flags != NULL, "invariant");
3023 assert(has_final_method != NULL, "invariant");
3024 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
3025
3026 assert(NULL == _methods, "invariant");
3027
3028 cfs->guarantee_more(2, CHECK); // length
3029 const u2 length = cfs->get_u2_fast();
3030 if (length == 0) {
3031 _methods = Universe::the_empty_method_array();
3032 } else {
3033 _methods = MetadataFactory::new_array<Method*>(_loader_data,
3034 length,
3035 NULL,
3036 CHECK);
3037
3038 for (int index = 0; index < length; index++) {
3039 Method* method = parse_method(cfs,
3040 is_interface,
3041 is_inline_type,
3042 _cp,
3043 promoted_flags,
3044 CHECK);
3045
3046 if (method->is_final()) {
3047 *has_final_method = true;
3048 }
3049 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
3050 // used for interface initialization, and default method inheritance analysis
3051 if (is_interface && !(*declares_nonstatic_concrete_methods)
3052 && !method->is_abstract() && !method->is_static()) {
3053 *declares_nonstatic_concrete_methods = true;
3054 }
3055 _methods->at_put(index, method);
3056 }
3057
3058 if (_need_verify && length > 1) {
3059 // Check duplicated methods
3060 ResourceMark rm(THREAD);
3061 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
3062 THREAD, NameSigHash*, HASH_ROW_SIZE);
3063 initialize_hashtable(names_and_sigs);
3064 bool dup = false;
3065 const Symbol* name = NULL;
3066 const Symbol* sig = NULL;
3067 {
3068 debug_only(NoSafepointVerifier nsv;)
3069 for (int i = 0; i < length; i++) {
3070 const Method* const m = _methods->at(i);
3071 name = m->name();
3072 sig = m->signature();
3073 // If no duplicates, add name/signature in hashtable names_and_sigs.
3074 if (!put_after_lookup(name, sig, names_and_sigs)) {
3075 dup = true;
3076 break;
3077 }
3078 }
3079 }
3080 if (dup) {
3081 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
3082 name->as_C_string(), sig->as_klass_external_name(), THREAD);
3083 }
3084 }
3085 }
3086 }
3087
3088 static const intArray* sort_methods(Array<Method*>* methods) {
3089 const int length = methods->length();
3090 // If JVMTI original method ordering or sharing is enabled we have to
3091 // remember the original class file ordering.
3092 // We temporarily use the vtable_index field in the Method* to store the
3093 // class file index, so we can read in after calling qsort.
3094 // Put the method ordering in the shared archive.
3095 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3096 for (int index = 0; index < length; index++) {
3097 Method* const m = methods->at(index);
3098 assert(!m->valid_vtable_index(), "vtable index should not be set");
3099 m->set_vtable_index(index);
3100 }
3101 }
3102 // Sort method array by ascending method name (for faster lookups & vtable construction)
3103 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3104 Method::sort_methods(methods);
3105
3106 intArray* method_ordering = NULL;
3107 // If JVMTI original method ordering or sharing is enabled construct int
3108 // array remembering the original ordering
3109 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3110 method_ordering = new intArray(length, length, -1);
3111 for (int index = 0; index < length; index++) {
3112 Method* const m = methods->at(index);
3113 const int old_index = m->vtable_index();
3114 assert(old_index >= 0 && old_index < length, "invalid method index");
3115 method_ordering->at_put(index, old_index);
3116 m->set_vtable_index(Method::invalid_vtable_index);
3117 }
3118 }
3119 return method_ordering;
3120 }
3121
3122 // Parse generic_signature attribute for methods and fields
3123 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3124 TRAPS) {
3125 assert(cfs != NULL, "invariant");
3126
3127 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3128 const u2 generic_signature_index = cfs->get_u2_fast();
3129 check_property(
3130 valid_symbol_at(generic_signature_index),
3131 "Invalid Signature attribute at constant pool index %u in class file %s",
3132 generic_signature_index, CHECK_0);
3133 return generic_signature_index;
3134 }
3135
3136 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3137 TRAPS) {
3138
3139 assert(cfs != NULL, "invariant");
3140
3141 cfs->guarantee_more(2, CHECK); // sourcefile_index
3142 const u2 sourcefile_index = cfs->get_u2_fast();
3143 check_property(
3144 valid_symbol_at(sourcefile_index),
3145 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3146 sourcefile_index, CHECK);
3147 set_class_sourcefile_index(sourcefile_index);
3148 }
3149
3150 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3151 int length,
3152 TRAPS) {
3153 assert(cfs != NULL, "invariant");
3154
3155 const u1* const sde_buffer = cfs->current();
3156 assert(sde_buffer != NULL, "null sde buffer");
3157
3158 // Don't bother storing it if there is no way to retrieve it
3159 if (JvmtiExport::can_get_source_debug_extension()) {
3160 assert((length+1) > length, "Overflow checking");
3161 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3162 for (int i = 0; i < length; i++) {
3163 sde[i] = sde_buffer[i];
3164 }
3165 sde[length] = '\0';
3166 set_class_sde_buffer((const char*)sde, length);
3167 }
3168 // Got utf8 string, set stream position forward
3169 cfs->skip_u1(length, CHECK);
3170 }
3171
3172
3173 // Inner classes can be static, private or protected (classic VM does this)
3174 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3175 JVM_ACC_PRIVATE | \
3176 JVM_ACC_PROTECTED | \
3177 JVM_ACC_STATIC \
3178 )
3179
3180 // Find index of the InnerClasses entry for the specified inner_class_info_index.
3181 // Return -1 if none is found.
3182 static int inner_classes_find_index(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
3183 Symbol* cp_klass_name = cp->klass_name_at(inner);
3184 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
3185 int idx_inner = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
3186 if (cp->klass_name_at(idx_inner) == cp_klass_name) {
3187 return idx;
3188 }
3189 }
3190 return -1;
3191 }
3192
3193 // Return the outer_class_info_index for the InnerClasses entry containing the
3194 // specified inner_class_info_index. Return -1 if no InnerClasses entry is found.
3195 static int inner_classes_jump_to_outer(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
3196 if (inner == 0) return -1;
3197 int idx = inner_classes_find_index(inner_classes, inner, cp, length);
3198 if (idx == -1) return -1;
3199 int result = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
3200 return result;
3201 }
3202
3203 // Return true if circularity is found, false if no circularity is found.
3204 // Use Floyd's cycle finding algorithm.
3205 static bool inner_classes_check_loop_through_outer(const Array<u2>* inner_classes, int idx, const ConstantPool* cp, int length) {
3206 int slow = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
3207 int fast = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
3208 while (fast != -1 && fast != 0) {
3209 if (slow != 0 && (cp->klass_name_at(slow) == cp->klass_name_at(fast))) {
3210 return true; // found a circularity
3211 }
3212 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
3213 if (fast == -1) return false;
3214 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
3215 if (fast == -1) return false;
3216 slow = inner_classes_jump_to_outer(inner_classes, slow, cp, length);
3217 assert(slow != -1, "sanity check");
3218 }
3219 return false;
3220 }
3221
3222 // Loop through each InnerClasses entry checking for circularities and duplications
3223 // with other entries. If duplicate entries are found then throw CFE. Otherwise,
3224 // return true if a circularity or entries with duplicate inner_class_info_indexes
3225 // are found.
3226 bool ClassFileParser::check_inner_classes_circularity(const ConstantPool* cp, int length, TRAPS) {
3227 // Loop through each InnerClasses entry.
3228 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
3229 // Return true if there are circular entries.
3230 if (inner_classes_check_loop_through_outer(_inner_classes, idx, cp, length)) {
3231 return true;
3232 }
3233 // Check if there are duplicate entries or entries with the same inner_class_info_index.
3234 for (int y = idx + InstanceKlass::inner_class_next_offset; y < length;
3235 y += InstanceKlass::inner_class_next_offset) {
3236
3237 // To maintain compatibility, throw an exception if duplicate inner classes
3238 // entries are found.
3239 guarantee_property((_inner_classes->at(idx) != _inner_classes->at(y) ||
3240 _inner_classes->at(idx+1) != _inner_classes->at(y+1) ||
3241 _inner_classes->at(idx+2) != _inner_classes->at(y+2) ||
3242 _inner_classes->at(idx+3) != _inner_classes->at(y+3)),
3243 "Duplicate entry in InnerClasses attribute in class file %s",
3244 CHECK_(true));
3245 // Return true if there are two entries with the same inner_class_info_index.
3246 if (_inner_classes->at(y) == _inner_classes->at(idx)) {
3247 return true;
3248 }
3249 }
3250 }
3251 return false;
3252 }
3253
3254 // Return number of classes in the inner classes attribute table
3255 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3256 const ConstantPool* cp,
3257 const u1* const inner_classes_attribute_start,
3258 bool parsed_enclosingmethod_attribute,
3259 u2 enclosing_method_class_index,
3260 u2 enclosing_method_method_index,
3261 TRAPS) {
3262 const u1* const current_mark = cfs->current();
3263 u2 length = 0;
3264 if (inner_classes_attribute_start != NULL) {
3265 cfs->set_current(inner_classes_attribute_start);
3266 cfs->guarantee_more(2, CHECK_0); // length
3267 length = cfs->get_u2_fast();
3268 }
3269
3270 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3271 // method data:
3272 // [inner_class_info_index,
3273 // outer_class_info_index,
3274 // inner_name_index,
3275 // inner_class_access_flags,
3276 // ...
3277 // enclosing_method_class_index,
3278 // enclosing_method_method_index]
3279 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3280 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3281 _inner_classes = inner_classes;
3282
3283 int index = 0;
3284 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3285 for (int n = 0; n < length; n++) {
3286 // Inner class index
3287 const u2 inner_class_info_index = cfs->get_u2_fast();
3288 check_property(
3289 valid_klass_reference_at(inner_class_info_index),
3290 "inner_class_info_index %u has bad constant type in class file %s",
3291 inner_class_info_index, CHECK_0);
3292 // Outer class index
3293 const u2 outer_class_info_index = cfs->get_u2_fast();
3294 check_property(
3295 outer_class_info_index == 0 ||
3296 valid_klass_reference_at(outer_class_info_index),
3297 "outer_class_info_index %u has bad constant type in class file %s",
3298 outer_class_info_index, CHECK_0);
3299 // Inner class name
3300 const u2 inner_name_index = cfs->get_u2_fast();
3301 check_property(
3302 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3303 "inner_name_index %u has bad constant type in class file %s",
3304 inner_name_index, CHECK_0);
3305 if (_need_verify) {
3306 guarantee_property(inner_class_info_index != outer_class_info_index,
3307 "Class is both outer and inner class in class file %s", CHECK_0);
3308 }
3309
3310 jint recognized_modifiers = RECOGNIZED_INNER_CLASS_MODIFIERS;
3311 // JVM_ACC_MODULE is defined in JDK-9 and later.
3312 if (_major_version >= JAVA_9_VERSION) {
3313 recognized_modifiers |= JVM_ACC_MODULE;
3314 }
3315 // JVM_ACC_INLINE is defined for class file version 55 and later
3316 if (supports_inline_types()) {
3317 recognized_modifiers |= JVM_ACC_INLINE;
3318 }
3319
3320 // Access flags
3321 jint flags = cfs->get_u2_fast() & recognized_modifiers;
3322
3323 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3324 // Set abstract bit for old class files for backward compatibility
3325 flags |= JVM_ACC_ABSTRACT;
3326 }
3327 verify_legal_class_modifiers(flags, CHECK_0);
3328 AccessFlags inner_access_flags(flags);
3329
3330 inner_classes->at_put(index++, inner_class_info_index);
3331 inner_classes->at_put(index++, outer_class_info_index);
3332 inner_classes->at_put(index++, inner_name_index);
3333 inner_classes->at_put(index++, inner_access_flags.as_short());
3334 }
3335
3336 // 4347400: make sure there's no duplicate entry in the classes array
3337 // Also, check for circular entries.
3338 bool has_circularity = false;
3339 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3340 has_circularity = check_inner_classes_circularity(cp, length * 4, CHECK_0);
3341 if (has_circularity) {
3342 // If circularity check failed then ignore InnerClasses attribute.
3343 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
3344 index = 0;
3345 if (parsed_enclosingmethod_attribute) {
3346 inner_classes = MetadataFactory::new_array<u2>(_loader_data, 2, CHECK_0);
3347 _inner_classes = inner_classes;
3348 } else {
3349 _inner_classes = Universe::the_empty_short_array();
3350 }
3351 }
3352 }
3353 // Set EnclosingMethod class and method indexes.
3354 if (parsed_enclosingmethod_attribute) {
3355 inner_classes->at_put(index++, enclosing_method_class_index);
3356 inner_classes->at_put(index++, enclosing_method_method_index);
3357 }
3358 assert(index == size || has_circularity, "wrong size");
3359
3360 // Restore buffer's current position.
3361 cfs->set_current(current_mark);
3362
3363 return length;
3364 }
3365
3366 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3367 const u1* const nest_members_attribute_start,
3368 TRAPS) {
3369 const u1* const current_mark = cfs->current();
3370 u2 length = 0;
3371 if (nest_members_attribute_start != NULL) {
3372 cfs->set_current(nest_members_attribute_start);
3373 cfs->guarantee_more(2, CHECK_0); // length
3374 length = cfs->get_u2_fast();
3375 }
3376 const int size = length;
3377 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3378 _nest_members = nest_members;
3379
3380 int index = 0;
3381 cfs->guarantee_more(2 * length, CHECK_0);
3382 for (int n = 0; n < length; n++) {
3383 const u2 class_info_index = cfs->get_u2_fast();
3384 check_property(
3385 valid_klass_reference_at(class_info_index),
3386 "Nest member class_info_index %u has bad constant type in class file %s",
3387 class_info_index, CHECK_0);
3388 nest_members->at_put(index++, class_info_index);
3389 }
3390 assert(index == size, "wrong size");
3391
3392 // Restore buffer's current position.
3393 cfs->set_current(current_mark);
3394
3395 return length;
3396 }
3397
3398 u2 ClassFileParser::parse_classfile_permitted_subclasses_attribute(const ClassFileStream* const cfs,
3399 const u1* const permitted_subclasses_attribute_start,
3400 TRAPS) {
3401 const u1* const current_mark = cfs->current();
3402 u2 length = 0;
3403 if (permitted_subclasses_attribute_start != NULL) {
3404 cfs->set_current(permitted_subclasses_attribute_start);
3405 cfs->guarantee_more(2, CHECK_0); // length
3406 length = cfs->get_u2_fast();
3407 }
3408 const int size = length;
3409 Array<u2>* const permitted_subclasses = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3410 _permitted_subclasses = permitted_subclasses;
3411
3412 if (length > 0) {
3413 int index = 0;
3414 cfs->guarantee_more(2 * length, CHECK_0);
3415 for (int n = 0; n < length; n++) {
3416 const u2 class_info_index = cfs->get_u2_fast();
3417 check_property(
3418 valid_klass_reference_at(class_info_index),
3419 "Permitted subclass class_info_index %u has bad constant type in class file %s",
3420 class_info_index, CHECK_0);
3421 permitted_subclasses->at_put(index++, class_info_index);
3422 }
3423 assert(index == size, "wrong size");
3424 }
3425
3426 // Restore buffer's current position.
3427 cfs->set_current(current_mark);
3428
3429 return length;
3430 }
3431
3432 // Record {
3433 // u2 attribute_name_index;
3434 // u4 attribute_length;
3435 // u2 components_count;
3436 // component_info components[components_count];
3437 // }
3438 // component_info {
3439 // u2 name_index;
3440 // u2 descriptor_index
3441 // u2 attributes_count;
3442 // attribute_info_attributes[attributes_count];
3443 // }
3444 u2 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3445 const ConstantPool* cp,
3446 const u1* const record_attribute_start,
3447 TRAPS) {
3448 const u1* const current_mark = cfs->current();
3449 int components_count = 0;
3450 unsigned int calculate_attr_size = 0;
3451 if (record_attribute_start != NULL) {
3452 cfs->set_current(record_attribute_start);
3453 cfs->guarantee_more(2, CHECK_0); // num of components
3454 components_count = (int)cfs->get_u2_fast();
3455 calculate_attr_size = 2;
3456 }
3457
3458 Array<RecordComponent*>* const record_components =
3459 MetadataFactory::new_array<RecordComponent*>(_loader_data, components_count, NULL, CHECK_0);
3460 _record_components = record_components;
3461
3462 for (int x = 0; x < components_count; x++) {
3463 cfs->guarantee_more(6, CHECK_0); // name_index, descriptor_index, attributes_count
3464
3465 const u2 name_index = cfs->get_u2_fast();
3466 check_property(valid_symbol_at(name_index),
3467 "Invalid constant pool index %u for name in Record attribute in class file %s",
3468 name_index, CHECK_0);
3469 const Symbol* const name = cp->symbol_at(name_index);
3470 verify_legal_field_name(name, CHECK_0);
3471
3472 const u2 descriptor_index = cfs->get_u2_fast();
3473 check_property(valid_symbol_at(descriptor_index),
3474 "Invalid constant pool index %u for descriptor in Record attribute in class file %s",
3475 descriptor_index, CHECK_0);
3476 const Symbol* const descr = cp->symbol_at(descriptor_index);
3477 verify_legal_field_signature(name, descr, CHECK_0);
3478
3479 const u2 attributes_count = cfs->get_u2_fast();
3480 calculate_attr_size += 6;
3481 u2 generic_sig_index = 0;
3482 const u1* runtime_visible_annotations = NULL;
3483 int runtime_visible_annotations_length = 0;
3484 const u1* runtime_invisible_annotations = NULL;
3485 int runtime_invisible_annotations_length = 0;
3486 bool runtime_invisible_annotations_exists = false;
3487 const u1* runtime_visible_type_annotations = NULL;
3488 int runtime_visible_type_annotations_length = 0;
3489 const u1* runtime_invisible_type_annotations = NULL;
3490 int runtime_invisible_type_annotations_length = 0;
3491 bool runtime_invisible_type_annotations_exists = false;
3492
3493 // Expected attributes for record components are Signature, Runtime(In)VisibleAnnotations,
3494 // and Runtime(In)VisibleTypeAnnotations. Other attributes are ignored.
3495 for (int y = 0; y < attributes_count; y++) {
3496 cfs->guarantee_more(6, CHECK_0); // attribute_name_index, attribute_length
3497 const u2 attribute_name_index = cfs->get_u2_fast();
3498 const u4 attribute_length = cfs->get_u4_fast();
3499 calculate_attr_size += 6;
3500 check_property(
3501 valid_symbol_at(attribute_name_index),
3502 "Invalid Record attribute name index %u in class file %s",
3503 attribute_name_index, CHECK_0);
3504
3505 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
3506 if (attribute_name == vmSymbols::tag_signature()) {
3507 if (generic_sig_index != 0) {
3508 classfile_parse_error(
3509 "Multiple Signature attributes for Record component in class file %s",
3510 THREAD);
3511 return 0;
3512 }
3513 if (attribute_length != 2) {
3514 classfile_parse_error(
3515 "Invalid Signature attribute length %u in Record component in class file %s",
3516 attribute_length, THREAD);
3517 return 0;
3518 }
3519 generic_sig_index = parse_generic_signature_attribute(cfs, CHECK_0);
3520
3521 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
3522 if (runtime_visible_annotations != NULL) {
3523 classfile_parse_error(
3524 "Multiple RuntimeVisibleAnnotations attributes for Record component in class file %s", THREAD);
3525 return 0;
3526 }
3527 runtime_visible_annotations_length = attribute_length;
3528 runtime_visible_annotations = cfs->current();
3529
3530 assert(runtime_visible_annotations != NULL, "null record component visible annotation");
3531 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_0);
3532 cfs->skip_u1_fast(runtime_visible_annotations_length);
3533
3534 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
3535 if (runtime_invisible_annotations_exists) {
3536 classfile_parse_error(
3537 "Multiple RuntimeInvisibleAnnotations attributes for Record component in class file %s", THREAD);
3538 return 0;
3539 }
3540 runtime_invisible_annotations_exists = true;
3541 if (PreserveAllAnnotations) {
3542 runtime_invisible_annotations_length = attribute_length;
3543 runtime_invisible_annotations = cfs->current();
3544 assert(runtime_invisible_annotations != NULL, "null record component invisible annotation");
3545 }
3546 cfs->skip_u1(attribute_length, CHECK_0);
3547
3548 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
3549 if (runtime_visible_type_annotations != NULL) {
3550 classfile_parse_error(
3551 "Multiple RuntimeVisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3552 return 0;
3553 }
3554 runtime_visible_type_annotations_length = attribute_length;
3555 runtime_visible_type_annotations = cfs->current();
3556
3557 assert(runtime_visible_type_annotations != NULL, "null record component visible type annotation");
3558 cfs->guarantee_more(runtime_visible_type_annotations_length, CHECK_0);
3559 cfs->skip_u1_fast(runtime_visible_type_annotations_length);
3560
3561 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
3562 if (runtime_invisible_type_annotations_exists) {
3563 classfile_parse_error(
3564 "Multiple RuntimeInvisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3565 return 0;
3566 }
3567 runtime_invisible_type_annotations_exists = true;
3568 if (PreserveAllAnnotations) {
3569 runtime_invisible_type_annotations_length = attribute_length;
3570 runtime_invisible_type_annotations = cfs->current();
3571 assert(runtime_invisible_type_annotations != NULL, "null record component invisible type annotation");
3572 }
3573 cfs->skip_u1(attribute_length, CHECK_0);
3574
3575 } else {
3576 // Skip unknown attributes
3577 cfs->skip_u1(attribute_length, CHECK_0);
3578 }
3579 calculate_attr_size += attribute_length;
3580 } // End of attributes For loop
3581
3582 AnnotationArray* annotations = assemble_annotations(runtime_visible_annotations,
3583 runtime_visible_annotations_length,
3584 runtime_invisible_annotations,
3585 runtime_invisible_annotations_length,
3586 CHECK_0);
3587 AnnotationArray* type_annotations = assemble_annotations(runtime_visible_type_annotations,
3588 runtime_visible_type_annotations_length,
3589 runtime_invisible_type_annotations,
3590 runtime_invisible_type_annotations_length,
3591 CHECK_0);
3592
3593 RecordComponent* record_component =
3594 RecordComponent::allocate(_loader_data, name_index, descriptor_index,
3595 attributes_count, generic_sig_index,
3596 annotations, type_annotations, CHECK_0);
3597 record_components->at_put(x, record_component);
3598 } // End of component processing loop
3599
3600 // Restore buffer's current position.
3601 cfs->set_current(current_mark);
3602 return calculate_attr_size;
3603 }
3604
3605 void ClassFileParser::parse_classfile_synthetic_attribute() {
3606 set_class_synthetic_flag(true);
3607 }
3608
3609 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3610 assert(cfs != NULL, "invariant");
3611
3612 const u2 signature_index = cfs->get_u2(CHECK);
3613 check_property(
3614 valid_symbol_at(signature_index),
3615 "Invalid constant pool index %u in Signature attribute in class file %s",
3616 signature_index, CHECK);
3617 set_class_generic_signature_index(signature_index);
3618 }
3619
3620 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3621 ConstantPool* cp,
3622 u4 attribute_byte_length,
3623 TRAPS) {
3624 assert(cfs != NULL, "invariant");
3625 assert(cp != NULL, "invariant");
3626
3627 const u1* const current_start = cfs->current();
3628
3629 guarantee_property(attribute_byte_length >= sizeof(u2),
3630 "Invalid BootstrapMethods attribute length %u in class file %s",
3631 attribute_byte_length,
3632 CHECK);
3633
3634 cfs->guarantee_more(attribute_byte_length, CHECK);
3635
3636 const int attribute_array_length = cfs->get_u2_fast();
3637
3638 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3639 "Short length on BootstrapMethods in class file %s",
3640 CHECK);
3641
3642
3643 // The attribute contains a counted array of counted tuples of shorts,
3644 // represending bootstrap specifiers:
3645 // length*{bootstrap_method_index, argument_count*{argument_index}}
3646 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3647 // operand_count = number of shorts in attr, except for leading length
3648
3649 // The attribute is copied into a short[] array.
3650 // The array begins with a series of short[2] pairs, one for each tuple.
3651 const int index_size = (attribute_array_length * 2);
3652
3653 Array<u2>* const operands =
3654 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3655
3656 // Eagerly assign operands so they will be deallocated with the constant
3657 // pool if there is an error.
3658 cp->set_operands(operands);
3659
3660 int operand_fill_index = index_size;
3661 const int cp_size = cp->length();
3662
3663 for (int n = 0; n < attribute_array_length; n++) {
3664 // Store a 32-bit offset into the header of the operand array.
3665 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3666
3667 // Read a bootstrap specifier.
3668 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3669 const u2 bootstrap_method_index = cfs->get_u2_fast();
3670 const u2 argument_count = cfs->get_u2_fast();
3671 check_property(
3672 valid_cp_range(bootstrap_method_index, cp_size) &&
3673 cp->tag_at(bootstrap_method_index).is_method_handle(),
3674 "bootstrap_method_index %u has bad constant type in class file %s",
3675 bootstrap_method_index,
3676 CHECK);
3677
3678 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3679 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3680 CHECK);
3681
3682 operands->at_put(operand_fill_index++, bootstrap_method_index);
3683 operands->at_put(operand_fill_index++, argument_count);
3684
3685 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3686 for (int j = 0; j < argument_count; j++) {
3687 const u2 argument_index = cfs->get_u2_fast();
3688 check_property(
3689 valid_cp_range(argument_index, cp_size) &&
3690 cp->tag_at(argument_index).is_loadable_constant(),
3691 "argument_index %u has bad constant type in class file %s",
3692 argument_index,
3693 CHECK);
3694 operands->at_put(operand_fill_index++, argument_index);
3695 }
3696 }
3697 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3698 "Bad length on BootstrapMethods in class file %s",
3699 CHECK);
3700 }
3701
3702 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3703 ConstantPool* cp,
3704 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3705 TRAPS) {
3706 assert(cfs != NULL, "invariant");
3707 assert(cp != NULL, "invariant");
3708 assert(parsed_annotations != NULL, "invariant");
3709
3710 // Set inner classes attribute to default sentinel
3711 _inner_classes = Universe::the_empty_short_array();
3712 // Set nest members attribute to default sentinel
3713 _nest_members = Universe::the_empty_short_array();
3714 // Set _permitted_subclasses attribute to default sentinel
3715 _permitted_subclasses = Universe::the_empty_short_array();
3716 cfs->guarantee_more(2, CHECK); // attributes_count
3717 u2 attributes_count = cfs->get_u2_fast();
3718 bool parsed_sourcefile_attribute = false;
3719 bool parsed_innerclasses_attribute = false;
3720 bool parsed_nest_members_attribute = false;
3721 bool parsed_permitted_subclasses_attribute = false;
3722 bool parsed_nest_host_attribute = false;
3723 bool parsed_record_attribute = false;
3724 bool parsed_enclosingmethod_attribute = false;
3725 bool parsed_bootstrap_methods_attribute = false;
3726 const u1* runtime_visible_annotations = NULL;
3727 int runtime_visible_annotations_length = 0;
3728 const u1* runtime_invisible_annotations = NULL;
3729 int runtime_invisible_annotations_length = 0;
3730 const u1* runtime_visible_type_annotations = NULL;
3731 int runtime_visible_type_annotations_length = 0;
3732 const u1* runtime_invisible_type_annotations = NULL;
3733 int runtime_invisible_type_annotations_length = 0;
3734 bool runtime_invisible_type_annotations_exists = false;
3735 bool runtime_invisible_annotations_exists = false;
3736 bool parsed_source_debug_ext_annotations_exist = false;
3737 const u1* inner_classes_attribute_start = NULL;
3738 u4 inner_classes_attribute_length = 0;
3739 u2 enclosing_method_class_index = 0;
3740 u2 enclosing_method_method_index = 0;
3741 const u1* nest_members_attribute_start = NULL;
3742 u4 nest_members_attribute_length = 0;
3743 const u1* record_attribute_start = NULL;
3744 u4 record_attribute_length = 0;
3745 const u1* permitted_subclasses_attribute_start = NULL;
3746 u4 permitted_subclasses_attribute_length = 0;
3747
3748 // Iterate over attributes
3749 while (attributes_count--) {
3750 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3751 const u2 attribute_name_index = cfs->get_u2_fast();
3752 const u4 attribute_length = cfs->get_u4_fast();
3753 check_property(
3754 valid_symbol_at(attribute_name_index),
3755 "Attribute name has bad constant pool index %u in class file %s",
3756 attribute_name_index, CHECK);
3757 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3758 if (tag == vmSymbols::tag_source_file()) {
3759 // Check for SourceFile tag
3760 if (_need_verify) {
3761 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3762 }
3763 if (parsed_sourcefile_attribute) {
3764 classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3765 return;
3766 } else {
3767 parsed_sourcefile_attribute = true;
3768 }
3769 parse_classfile_sourcefile_attribute(cfs, CHECK);
3770 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3771 // Check for SourceDebugExtension tag
3772 if (parsed_source_debug_ext_annotations_exist) {
3773 classfile_parse_error(
3774 "Multiple SourceDebugExtension attributes in class file %s", THREAD);
3775 return;
3776 }
3777 parsed_source_debug_ext_annotations_exist = true;
3778 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3779 } else if (tag == vmSymbols::tag_inner_classes()) {
3780 // Check for InnerClasses tag
3781 if (parsed_innerclasses_attribute) {
3782 classfile_parse_error("Multiple InnerClasses attributes in class file %s", THREAD);
3783 return;
3784 } else {
3785 parsed_innerclasses_attribute = true;
3786 }
3787 inner_classes_attribute_start = cfs->current();
3788 inner_classes_attribute_length = attribute_length;
3789 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3790 } else if (tag == vmSymbols::tag_synthetic()) {
3791 // Check for Synthetic tag
3792 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3793 if (attribute_length != 0) {
3794 classfile_parse_error(
3795 "Invalid Synthetic classfile attribute length %u in class file %s",
3796 attribute_length, THREAD);
3797 return;
3798 }
3799 parse_classfile_synthetic_attribute();
3800 } else if (tag == vmSymbols::tag_deprecated()) {
3801 // Check for Deprecated tag - 4276120
3802 if (attribute_length != 0) {
3803 classfile_parse_error(
3804 "Invalid Deprecated classfile attribute length %u in class file %s",
3805 attribute_length, THREAD);
3806 return;
3807 }
3808 } else if (_major_version >= JAVA_1_5_VERSION) {
3809 if (tag == vmSymbols::tag_signature()) {
3810 if (_generic_signature_index != 0) {
3811 classfile_parse_error(
3812 "Multiple Signature attributes in class file %s", THREAD);
3813 return;
3814 }
3815 if (attribute_length != 2) {
3816 classfile_parse_error(
3817 "Wrong Signature attribute length %u in class file %s",
3818 attribute_length, THREAD);
3819 return;
3820 }
3821 parse_classfile_signature_attribute(cfs, CHECK);
3822 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3823 if (runtime_visible_annotations != NULL) {
3824 classfile_parse_error(
3825 "Multiple RuntimeVisibleAnnotations attributes in class file %s", THREAD);
3826 return;
3827 }
3828 runtime_visible_annotations_length = attribute_length;
3829 runtime_visible_annotations = cfs->current();
3830 assert(runtime_visible_annotations != NULL, "null visible annotations");
3831 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3832 parse_annotations(cp,
3833 runtime_visible_annotations,
3834 runtime_visible_annotations_length,
3835 parsed_annotations,
3836 _loader_data,
3837 _can_access_vm_annotations);
3838 cfs->skip_u1_fast(runtime_visible_annotations_length);
3839 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3840 if (runtime_invisible_annotations_exists) {
3841 classfile_parse_error(
3842 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", THREAD);
3843 return;
3844 }
3845 runtime_invisible_annotations_exists = true;
3846 if (PreserveAllAnnotations) {
3847 runtime_invisible_annotations_length = attribute_length;
3848 runtime_invisible_annotations = cfs->current();
3849 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3850 }
3851 cfs->skip_u1(attribute_length, CHECK);
3852 } else if (tag == vmSymbols::tag_enclosing_method()) {
3853 if (parsed_enclosingmethod_attribute) {
3854 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", THREAD);
3855 return;
3856 } else {
3857 parsed_enclosingmethod_attribute = true;
3858 }
3859 guarantee_property(attribute_length == 4,
3860 "Wrong EnclosingMethod attribute length %u in class file %s",
3861 attribute_length, CHECK);
3862 cfs->guarantee_more(4, CHECK); // class_index, method_index
3863 enclosing_method_class_index = cfs->get_u2_fast();
3864 enclosing_method_method_index = cfs->get_u2_fast();
3865 if (enclosing_method_class_index == 0) {
3866 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", THREAD);
3867 return;
3868 }
3869 // Validate the constant pool indices and types
3870 check_property(valid_klass_reference_at(enclosing_method_class_index),
3871 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3872 if (enclosing_method_method_index != 0 &&
3873 (!cp->is_within_bounds(enclosing_method_method_index) ||
3874 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3875 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", THREAD);
3876 return;
3877 }
3878 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3879 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3880 if (parsed_bootstrap_methods_attribute) {
3881 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", THREAD);
3882 return;
3883 }
3884 parsed_bootstrap_methods_attribute = true;
3885 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3886 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3887 if (runtime_visible_type_annotations != NULL) {
3888 classfile_parse_error(
3889 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", THREAD);
3890 return;
3891 }
3892 runtime_visible_type_annotations_length = attribute_length;
3893 runtime_visible_type_annotations = cfs->current();
3894 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3895 // No need for the VM to parse Type annotations
3896 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3897 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3898 if (runtime_invisible_type_annotations_exists) {
3899 classfile_parse_error(
3900 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", THREAD);
3901 return;
3902 } else {
3903 runtime_invisible_type_annotations_exists = true;
3904 }
3905 if (PreserveAllAnnotations) {
3906 runtime_invisible_type_annotations_length = attribute_length;
3907 runtime_invisible_type_annotations = cfs->current();
3908 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3909 }
3910 cfs->skip_u1(attribute_length, CHECK);
3911 } else if (_major_version >= JAVA_11_VERSION) {
3912 if (tag == vmSymbols::tag_nest_members()) {
3913 // Check for NestMembers tag
3914 if (parsed_nest_members_attribute) {
3915 classfile_parse_error("Multiple NestMembers attributes in class file %s", THREAD);
3916 return;
3917 } else {
3918 parsed_nest_members_attribute = true;
3919 }
3920 if (parsed_nest_host_attribute) {
3921 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", THREAD);
3922 return;
3923 }
3924 nest_members_attribute_start = cfs->current();
3925 nest_members_attribute_length = attribute_length;
3926 cfs->skip_u1(nest_members_attribute_length, CHECK);
3927 } else if (tag == vmSymbols::tag_nest_host()) {
3928 if (parsed_nest_host_attribute) {
3929 classfile_parse_error("Multiple NestHost attributes in class file %s", THREAD);
3930 return;
3931 } else {
3932 parsed_nest_host_attribute = true;
3933 }
3934 if (parsed_nest_members_attribute) {
3935 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", THREAD);
3936 return;
3937 }
3938 if (_need_verify) {
3939 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3940 }
3941 cfs->guarantee_more(2, CHECK);
3942 u2 class_info_index = cfs->get_u2_fast();
3943 check_property(
3944 valid_klass_reference_at(class_info_index),
3945 "Nest-host class_info_index %u has bad constant type in class file %s",
3946 class_info_index, CHECK);
3947 _nest_host = class_info_index;
3948
3949 } else if (_major_version >= JAVA_16_VERSION) {
3950 if (tag == vmSymbols::tag_record()) {
3951 if (parsed_record_attribute) {
3952 classfile_parse_error("Multiple Record attributes in class file %s", THREAD);
3953 return;
3954 }
3955 parsed_record_attribute = true;
3956 record_attribute_start = cfs->current();
3957 record_attribute_length = attribute_length;
3958 } else if (_major_version >= JAVA_17_VERSION) {
3959 if (tag == vmSymbols::tag_permitted_subclasses()) {
3960 if (parsed_permitted_subclasses_attribute) {
3961 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
3962 return;
3963 }
3964 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
3965 if (_access_flags.is_final()) {
3966 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
3967 return;
3968 }
3969 parsed_permitted_subclasses_attribute = true;
3970 permitted_subclasses_attribute_start = cfs->current();
3971 permitted_subclasses_attribute_length = attribute_length;
3972 }
3973 }
3974 // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
3975 cfs->skip_u1(attribute_length, CHECK);
3976 } else {
3977 // Unknown attribute
3978 cfs->skip_u1(attribute_length, CHECK);
3979 }
3980 } else {
3981 // Unknown attribute
3982 cfs->skip_u1(attribute_length, CHECK);
3983 }
3984 } else {
3985 // Unknown attribute
3986 cfs->skip_u1(attribute_length, CHECK);
3987 }
3988 }
3989 _class_annotations = assemble_annotations(runtime_visible_annotations,
3990 runtime_visible_annotations_length,
3991 runtime_invisible_annotations,
3992 runtime_invisible_annotations_length,
3993 CHECK);
3994 _class_type_annotations = assemble_annotations(runtime_visible_type_annotations,
3995 runtime_visible_type_annotations_length,
3996 runtime_invisible_type_annotations,
3997 runtime_invisible_type_annotations_length,
3998 CHECK);
3999
4000 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
4001 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
4002 cfs,
4003 cp,
4004 inner_classes_attribute_start,
4005 parsed_innerclasses_attribute,
4006 enclosing_method_class_index,
4007 enclosing_method_method_index,
4008 CHECK);
4009 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
4010 guarantee_property(
4011 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
4012 "Wrong InnerClasses attribute length in class file %s", CHECK);
4013 }
4014 }
4015
4016 if (parsed_nest_members_attribute) {
4017 const u2 num_of_classes = parse_classfile_nest_members_attribute(
4018 cfs,
4019 nest_members_attribute_start,
4020 CHECK);
4021 if (_need_verify) {
4022 guarantee_property(
4023 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
4024 "Wrong NestMembers attribute length in class file %s", CHECK);
4025 }
4026 }
4027
4028 if (parsed_record_attribute) {
4029 const unsigned int calculated_attr_length = parse_classfile_record_attribute(
4030 cfs,
4031 cp,
4032 record_attribute_start,
4033 CHECK);
4034 if (_need_verify) {
4035 guarantee_property(record_attribute_length == calculated_attr_length,
4036 "Record attribute has wrong length in class file %s",
4037 CHECK);
4038 }
4039 }
4040
4041 if (parsed_permitted_subclasses_attribute) {
4042 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
4043 cfs,
4044 permitted_subclasses_attribute_start,
4045 CHECK);
4046 if (_need_verify) {
4047 guarantee_property(
4048 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
4049 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
4050 }
4051 }
4052
4053 if (_max_bootstrap_specifier_index >= 0) {
4054 guarantee_property(parsed_bootstrap_methods_attribute,
4055 "Missing BootstrapMethods attribute in class file %s", CHECK);
4056 }
4057 }
4058
4059 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
4060 assert(k != NULL, "invariant");
4061
4062 if (_synthetic_flag)
4063 k->set_is_synthetic();
4064 if (_sourcefile_index != 0) {
4065 k->set_source_file_name_index(_sourcefile_index);
4066 }
4067 if (_generic_signature_index != 0) {
4068 k->set_generic_signature_index(_generic_signature_index);
4069 }
4070 if (_sde_buffer != NULL) {
4071 k->set_source_debug_extension(_sde_buffer, _sde_length);
4072 }
4073 }
4074
4075 // Create the Annotations object that will
4076 // hold the annotations array for the Klass.
4077 void ClassFileParser::create_combined_annotations(TRAPS) {
4078 if (_class_annotations == NULL &&
4079 _class_type_annotations == NULL &&
4080 _fields_annotations == NULL &&
4081 _fields_type_annotations == NULL) {
4082 // Don't create the Annotations object unnecessarily.
4083 return;
4084 }
4085
4086 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
4087 annotations->set_class_annotations(_class_annotations);
4088 annotations->set_class_type_annotations(_class_type_annotations);
4089 annotations->set_fields_annotations(_fields_annotations);
4090 annotations->set_fields_type_annotations(_fields_type_annotations);
4091
4092 // This is the Annotations object that will be
4093 // assigned to InstanceKlass being constructed.
4094 _combined_annotations = annotations;
4095
4096 // The annotations arrays below has been transfered the
4097 // _combined_annotations so these fields can now be cleared.
4098 _class_annotations = NULL;
4099 _class_type_annotations = NULL;
4100 _fields_annotations = NULL;
4101 _fields_type_annotations = NULL;
4102 }
4103
4104 // Transfer ownership of metadata allocated to the InstanceKlass.
4105 void ClassFileParser::apply_parsed_class_metadata(
4106 InstanceKlass* this_klass,
4107 int java_fields_count) {
4108 assert(this_klass != NULL, "invariant");
4109
4110 _cp->set_pool_holder(this_klass);
4111 this_klass->set_constants(_cp);
4112 this_klass->set_fields(_fields, java_fields_count);
4113 this_klass->set_methods(_methods);
4114 this_klass->set_inner_classes(_inner_classes);
4115 this_klass->set_nest_members(_nest_members);
4116 this_klass->set_nest_host_index(_nest_host);
4117 this_klass->set_annotations(_combined_annotations);
4118 this_klass->set_permitted_subclasses(_permitted_subclasses);
4119 this_klass->set_record_components(_record_components);
4120 // Delay the setting of _local_interfaces and _transitive_interfaces until after
4121 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
4122 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
4123 // its _super. If an OOM occurs while loading the current klass, its _super field
4124 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
4125 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
4126 // dereferences to the deallocated _transitive_interfaces will result in a crash.
4127
4128 // Clear out these fields so they don't get deallocated by the destructor
4129 clear_class_metadata();
4130 }
4131
4132 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
4133 int runtime_visible_annotations_length,
4134 const u1* const runtime_invisible_annotations,
4135 int runtime_invisible_annotations_length,
4136 TRAPS) {
4137 AnnotationArray* annotations = NULL;
4138 if (runtime_visible_annotations != NULL ||
4139 runtime_invisible_annotations != NULL) {
4140 annotations = MetadataFactory::new_array<u1>(_loader_data,
4141 runtime_visible_annotations_length +
4142 runtime_invisible_annotations_length,
4143 CHECK_(annotations));
4144 if (runtime_visible_annotations != NULL) {
4145 for (int i = 0; i < runtime_visible_annotations_length; i++) {
4146 annotations->at_put(i, runtime_visible_annotations[i]);
4147 }
4148 }
4149 if (runtime_invisible_annotations != NULL) {
4150 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
4151 int append = runtime_visible_annotations_length+i;
4152 annotations->at_put(append, runtime_invisible_annotations[i]);
4153 }
4154 }
4155 }
4156 return annotations;
4157 }
4158
4159 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
4160 const int super_class_index,
4161 const bool need_verify,
4162 TRAPS) {
4163 assert(cp != NULL, "invariant");
4164 const InstanceKlass* super_klass = NULL;
4165
4166 if (super_class_index == 0) {
4167 check_property(_class_name == vmSymbols::java_lang_Object(),
4168 "Invalid superclass index 0 in class file %s",
4169 CHECK_NULL);
4170 } else {
4171 check_property(valid_klass_reference_at(super_class_index),
4172 "Invalid superclass index %u in class file %s",
4173 super_class_index,
4174 CHECK_NULL);
4175 // The class name should be legal because it is checked when parsing constant pool.
4176 // However, make sure it is not an array type.
4177 bool is_array = false;
4178 if (cp->tag_at(super_class_index).is_klass()) {
4179 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
4180 if (need_verify)
4181 is_array = super_klass->is_array_klass();
4182 } else if (need_verify) {
4183 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
4184 }
4185 if (need_verify) {
4186 guarantee_property(!is_array,
4187 "Bad superclass name in class file %s", CHECK_NULL);
4188 }
4189 }
4190 return super_klass;
4191 }
4192
4193 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
4194 _max_nonstatic_oop_maps = max_blocks;
4195 _nonstatic_oop_map_count = 0;
4196 if (max_blocks == 0) {
4197 _nonstatic_oop_maps = NULL;
4198 } else {
4199 _nonstatic_oop_maps =
4200 NEW_RESOURCE_ARRAY(OopMapBlock, _max_nonstatic_oop_maps);
4201 memset(_nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
4202 }
4203 }
4204
4205 OopMapBlock* OopMapBlocksBuilder::last_oop_map() const {
4206 assert(_nonstatic_oop_map_count > 0, "Has no oop maps");
4207 return _nonstatic_oop_maps + (_nonstatic_oop_map_count - 1);
4208 }
4209
4210 // addition of super oop maps
4211 void OopMapBlocksBuilder::initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
4212 assert(nof_blocks && _nonstatic_oop_map_count == 0 &&
4213 nof_blocks <= _max_nonstatic_oop_maps, "invariant");
4214
4215 memcpy(_nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
4216 _nonstatic_oop_map_count += nof_blocks;
4217 }
4218
4219 // collection of oops
4220 void OopMapBlocksBuilder::add(int offset, int count) {
4221 if (_nonstatic_oop_map_count == 0) {
4222 _nonstatic_oop_map_count++;
4223 }
4224 OopMapBlock* nonstatic_oop_map = last_oop_map();
4225 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
4226 nonstatic_oop_map->set_offset(offset);
4227 nonstatic_oop_map->set_count(count);
4228 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
4229 nonstatic_oop_map->increment_count(count);
4230 } else { // Need a new one...
4231 _nonstatic_oop_map_count++;
4232 assert(_nonstatic_oop_map_count <= _max_nonstatic_oop_maps, "range check");
4233 nonstatic_oop_map = last_oop_map();
4234 nonstatic_oop_map->set_offset(offset);
4235 nonstatic_oop_map->set_count(count);
4236 }
4237 }
4238
4239 // general purpose copy, e.g. into allocated instanceKlass
4240 void OopMapBlocksBuilder::copy(OopMapBlock* dst) {
4241 if (_nonstatic_oop_map_count != 0) {
4242 memcpy(dst, _nonstatic_oop_maps, sizeof(OopMapBlock) * _nonstatic_oop_map_count);
4243 }
4244 }
4245
4246 // Sort and compact adjacent blocks
4247 void OopMapBlocksBuilder::compact() {
4248 if (_nonstatic_oop_map_count <= 1) {
4249 return;
4250 }
4251 /*
4252 * Since field layout sneeks in oops before values, we will be able to condense
4253 * blocks. There is potential to compact between super, own refs and values
4254 * containing refs.
4255 *
4256 * Currently compaction is slightly limited due to values being 8 byte aligned.
4257 * This may well change: FixMe if it doesn't, the code below is fairly general purpose
4258 * and maybe it doesn't need to be.
4259 */
4260 qsort(_nonstatic_oop_maps, _nonstatic_oop_map_count, sizeof(OopMapBlock),
4261 (_sort_Fn)OopMapBlock::compare_offset);
4262 if (_nonstatic_oop_map_count < 2) {
4263 return;
4264 }
4265
4266 // Make a temp copy, and iterate through and copy back into the original
4267 ResourceMark rm;
4268 OopMapBlock* oop_maps_copy =
4269 NEW_RESOURCE_ARRAY(OopMapBlock, _nonstatic_oop_map_count);
4270 OopMapBlock* oop_maps_copy_end = oop_maps_copy + _nonstatic_oop_map_count;
4271 copy(oop_maps_copy);
4272 OopMapBlock* nonstatic_oop_map = _nonstatic_oop_maps;
4273 unsigned int new_count = 1;
4274 oop_maps_copy++;
4275 while(oop_maps_copy < oop_maps_copy_end) {
4276 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
4277 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
4278 nonstatic_oop_map->increment_count(oop_maps_copy->count());
4279 } else {
4280 nonstatic_oop_map++;
4281 new_count++;
4282 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
4283 nonstatic_oop_map->set_count(oop_maps_copy->count());
4284 }
4285 oop_maps_copy++;
4286 }
4287 assert(new_count <= _nonstatic_oop_map_count, "end up with more maps after compact() ?");
4288 _nonstatic_oop_map_count = new_count;
4289 }
4290
4291 void OopMapBlocksBuilder::print_on(outputStream* st) const {
4292 st->print_cr(" OopMapBlocks: %3d /%3d", _nonstatic_oop_map_count, _max_nonstatic_oop_maps);
4293 if (_nonstatic_oop_map_count > 0) {
4294 OopMapBlock* map = _nonstatic_oop_maps;
4295 OopMapBlock* last_map = last_oop_map();
4296 assert(map <= last_map, "Last less than first");
4297 while (map <= last_map) {
4298 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
4299 map->offset() + map->offset_span() - heapOopSize, map->count());
4300 map++;
4301 }
4302 }
4303 }
4304
4305 void OopMapBlocksBuilder::print_value_on(outputStream* st) const {
4306 print_on(st);
4307 }
4308
4309 void ClassFileParser::throwInlineTypeLimitation(THREAD_AND_LOCATION_DECL,
4310 const char* msg,
4311 const Symbol* name,
4312 const Symbol* sig) const {
4313
4314 ResourceMark rm(THREAD);
4315 if (name == NULL || sig == NULL) {
4316 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4317 vmSymbols::java_lang_ClassFormatError(),
4318 "class: %s - %s", _class_name->as_C_string(), msg);
4319 }
4320 else {
4321 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4322 vmSymbols::java_lang_ClassFormatError(),
4323 "\"%s\" sig: \"%s\" class: %s - %s", name->as_C_string(), sig->as_C_string(),
4324 _class_name->as_C_string(), msg);
4325 }
4326 }
4327
4328 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4329 assert(ik != NULL, "invariant");
4330
4331 const Klass* const super = ik->super();
4332
4333 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4334 // in which case we don't have to register objects as finalizable
4335 if (!_has_empty_finalizer) {
4336 if (_has_finalizer ||
4337 (super != NULL && super->has_finalizer())) {
4338 ik->set_has_finalizer();
4339 }
4340 }
4341
4342 #ifdef ASSERT
4343 bool f = false;
4344 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4345 vmSymbols::void_method_signature());
4346 if (m != NULL && !m->is_empty_method()) {
4347 f = true;
4348 }
4349
4350 // Spec doesn't prevent agent from redefinition of empty finalizer.
4351 // Despite the fact that it's generally bad idea and redefined finalizer
4352 // will not work as expected we shouldn't abort vm in this case
4353 if (!ik->has_redefined_this_or_super()) {
4354 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4355 }
4356 #endif
4357
4358 // Check if this klass supports the java.lang.Cloneable interface
4359 if (vmClasses::Cloneable_klass_loaded()) {
4360 if (ik->is_subtype_of(vmClasses::Cloneable_klass())) {
4361 if (ik->is_inline_klass()) {
4362 JavaThread *THREAD = JavaThread::current();
4363 throwInlineTypeLimitation(THREAD_AND_LOCATION, "Inline Types do not support Cloneable");
4364 return;
4365 }
4366 ik->set_is_cloneable();
4367 }
4368 }
4369
4370 // Check if this klass has a vanilla default constructor
4371 if (super == NULL) {
4372 // java.lang.Object has empty default constructor
4373 ik->set_has_vanilla_constructor();
4374 } else {
4375 if (super->has_vanilla_constructor() &&
4376 _has_vanilla_constructor) {
4377 ik->set_has_vanilla_constructor();
4378 }
4379 #ifdef ASSERT
4380 bool v = false;
4381 if (super->has_vanilla_constructor()) {
4382 const Method* const constructor =
4383 ik->find_method(vmSymbols::object_initializer_name(),
4384 vmSymbols::void_method_signature());
4385 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4386 v = true;
4387 }
4388 }
4389 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4390 #endif
4391 }
4392
4393 // If it cannot be fast-path allocated, set a bit in the layout helper.
4394 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4395 assert(ik->size_helper() > 0, "layout_helper is initialized");
4396 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4397 || ik->is_abstract() || ik->is_interface()
4398 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4399 || ik->size_helper() >= FastAllocateSizeLimit) {
4400 // Forbid fast-path allocation.
4401 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4402 ik->set_layout_helper(lh);
4403 }
4404 }
4405
4406 bool ClassFileParser::supports_inline_types() const {
4407 // Inline types are only supported by class file version 55 and later
4408 return _major_version >= JAVA_11_VERSION;
4409 }
4410
4411 // utility methods for appending an array with check for duplicates
4412
4413 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4414 const Array<InstanceKlass*>* const ifs) {
4415 // iterate over new interfaces
4416 for (int i = 0; i < ifs->length(); i++) {
4417 InstanceKlass* const e = ifs->at(i);
4418 assert(e->is_klass() && e->is_interface(), "just checking");
4419 // add new interface
4420 result->append_if_missing(e);
4421 }
4422 }
4423
4424 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4425 Array<InstanceKlass*>* local_ifs,
4426 ClassLoaderData* loader_data,
4427 TRAPS) {
4428 assert(local_ifs != NULL, "invariant");
4429 assert(loader_data != NULL, "invariant");
4430
4431 // Compute maximum size for transitive interfaces
4432 int max_transitive_size = 0;
4433 int super_size = 0;
4434 // Add superclass transitive interfaces size
4435 if (super != NULL) {
4436 super_size = super->transitive_interfaces()->length();
4437 max_transitive_size += super_size;
4438 }
4439 // Add local interfaces' super interfaces
4440 const int local_size = local_ifs->length();
4441 for (int i = 0; i < local_size; i++) {
4442 InstanceKlass* const l = local_ifs->at(i);
4443 max_transitive_size += l->transitive_interfaces()->length();
4444 }
4445 // Finally add local interfaces
4446 max_transitive_size += local_size;
4447 // Construct array
4448 if (max_transitive_size == 0) {
4449 // no interfaces, use canonicalized array
4450 return Universe::the_empty_instance_klass_array();
4451 } else if (max_transitive_size == super_size) {
4452 // no new local interfaces added, share superklass' transitive interface array
4453 return super->transitive_interfaces();
4454 // The three lines below are commented to work around bug JDK-8245487
4455 // } else if (max_transitive_size == local_size) {
4456 // // only local interfaces added, share local interface array
4457 // return local_ifs;
4458 } else {
4459 ResourceMark rm;
4460 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4461
4462 // Copy down from superclass
4463 if (super != NULL) {
4464 append_interfaces(result, super->transitive_interfaces());
4465 }
4466
4467 // Copy down from local interfaces' superinterfaces
4468 for (int i = 0; i < local_size; i++) {
4469 InstanceKlass* const l = local_ifs->at(i);
4470 append_interfaces(result, l->transitive_interfaces());
4471 }
4472 // Finally add local interfaces
4473 append_interfaces(result, local_ifs);
4474
4475 // length will be less than the max_transitive_size if duplicates were removed
4476 const int length = result->length();
4477 assert(length <= max_transitive_size, "just checking");
4478
4479 if (length == 1 && result->at(0) == vmClasses::IdentityObject_klass()) {
4480 return Universe::the_single_IdentityObject_klass_array();
4481 }
4482 if (length == 1 && result->at(0) == vmClasses::PrimitiveObject_klass()) {
4483 return Universe::the_single_PrimitiveObject_klass_array();
4484 }
4485
4486 Array<InstanceKlass*>* const new_result =
4487 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4488 for (int i = 0; i < length; i++) {
4489 InstanceKlass* const e = result->at(i);
4490 assert(e != NULL, "just checking");
4491 new_result->at_put(i, e);
4492 }
4493 return new_result;
4494 }
4495 }
4496
4497 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4498 assert(this_klass != NULL, "invariant");
4499 const Klass* const super = this_klass->super();
4500
4501 if (super != NULL) {
4502 const InstanceKlass* super_ik = InstanceKlass::cast(super);
4503
4504 if (super->is_final()) {
4505 classfile_icce_error("class %s cannot inherit from final class %s", super_ik, THREAD);
4506 return;
4507 }
4508
4509 if (super_ik->is_sealed() && !super_ik->has_as_permitted_subclass(this_klass)) {
4510 classfile_icce_error("class %s cannot inherit from sealed class %s", super_ik, THREAD);
4511 return;
4512 }
4513
4514 // If the loader is not the boot loader then throw an exception if its
4515 // superclass is in package jdk.internal.reflect and its loader is not a
4516 // special reflection class loader
4517 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4518 PackageEntry* super_package = super->package();
4519 if (super_package != NULL &&
4520 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4521 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4522 ResourceMark rm(THREAD);
4523 Exceptions::fthrow(
4524 THREAD_AND_LOCATION,
4525 vmSymbols::java_lang_IllegalAccessError(),
4526 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4527 this_klass->external_name(),
4528 this_klass->class_loader_data()->loader_name_and_id(),
4529 super->external_name());
4530 return;
4531 }
4532 }
4533
4534 Reflection::VerifyClassAccessResults vca_result =
4535 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4536 if (vca_result != Reflection::ACCESS_OK) {
4537 ResourceMark rm(THREAD);
4538 char* msg = Reflection::verify_class_access_msg(this_klass,
4539 InstanceKlass::cast(super),
4540 vca_result);
4541 if (msg == NULL) {
4542 bool same_module = (this_klass->module() == super->module());
4543 Exceptions::fthrow(
4544 THREAD_AND_LOCATION,
4545 vmSymbols::java_lang_IllegalAccessError(),
4546 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4547 this_klass->external_name(),
4548 super->is_abstract() ? "abstract " : "",
4549 super->external_name(),
4550 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4551 (same_module) ? "" : "; ",
4552 (same_module) ? "" : super->class_in_module_of_loader());
4553 } else {
4554 // Add additional message content.
4555 Exceptions::fthrow(
4556 THREAD_AND_LOCATION,
4557 vmSymbols::java_lang_IllegalAccessError(),
4558 "superclass access check failed: %s",
4559 msg);
4560 }
4561 }
4562 }
4563 }
4564
4565
4566 void ClassFileParser::check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4567 assert(this_klass != NULL, "invariant");
4568 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4569 const int lng = local_interfaces->length();
4570 for (int i = lng - 1; i >= 0; i--) {
4571 InstanceKlass* const k = local_interfaces->at(i);
4572 assert (k != NULL && k->is_interface(), "invalid interface");
4573
4574 if (k->is_sealed() && !k->has_as_permitted_subclass(this_klass)) {
4575 classfile_icce_error(this_klass->is_interface() ?
4576 "class %s cannot extend sealed interface %s" :
4577 "class %s cannot implement sealed interface %s",
4578 k, THREAD);
4579 return;
4580 }
4581
4582 Reflection::VerifyClassAccessResults vca_result =
4583 Reflection::verify_class_access(this_klass, k, false);
4584 if (vca_result != Reflection::ACCESS_OK) {
4585 ResourceMark rm(THREAD);
4586 char* msg = Reflection::verify_class_access_msg(this_klass,
4587 k,
4588 vca_result);
4589 if (msg == NULL) {
4590 bool same_module = (this_klass->module() == k->module());
4591 Exceptions::fthrow(
4592 THREAD_AND_LOCATION,
4593 vmSymbols::java_lang_IllegalAccessError(),
4594 "class %s cannot access its superinterface %s (%s%s%s)",
4595 this_klass->external_name(),
4596 k->external_name(),
4597 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4598 (same_module) ? "" : "; ",
4599 (same_module) ? "" : k->class_in_module_of_loader());
4600 } else {
4601 // Add additional message content.
4602 Exceptions::fthrow(
4603 THREAD_AND_LOCATION,
4604 vmSymbols::java_lang_IllegalAccessError(),
4605 "superinterface check failed: %s",
4606 msg);
4607 }
4608 }
4609 }
4610 }
4611
4612
4613 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4614 assert(this_klass != NULL, "invariant");
4615 const Array<Method*>* const methods = this_klass->methods();
4616 const int num_methods = methods->length();
4617
4618 // go thru each method and check if it overrides a final method
4619 for (int index = 0; index < num_methods; index++) {
4620 const Method* const m = methods->at(index);
4621
4622 // skip private, static, and <init> methods
4623 if ((!m->is_private() && !m->is_static()) &&
4624 (m->name() != vmSymbols::object_initializer_name())) {
4625
4626 const Symbol* const name = m->name();
4627 const Symbol* const signature = m->signature();
4628 const Klass* k = this_klass->super();
4629 const Method* super_m = NULL;
4630 while (k != NULL) {
4631 // skip supers that don't have final methods.
4632 if (k->has_final_method()) {
4633 // lookup a matching method in the super class hierarchy
4634 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4635 if (super_m == NULL) {
4636 break; // didn't find any match; get out
4637 }
4638
4639 if (super_m->is_final() && !super_m->is_static() &&
4640 !super_m->access_flags().is_private()) {
4641 // matching method in super is final, and not static or private
4642 bool can_access = Reflection::verify_member_access(this_klass,
4643 super_m->method_holder(),
4644 super_m->method_holder(),
4645 super_m->access_flags(),
4646 false, false, CHECK);
4647 if (can_access) {
4648 // this class can access super final method and therefore override
4649 ResourceMark rm(THREAD);
4650 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
4651 err_msg("class %s overrides final method %s.%s%s",
4652 this_klass->external_name(),
4653 super_m->method_holder()->external_name(),
4654 name->as_C_string(),
4655 signature->as_C_string()));
4656 }
4657 }
4658
4659 // continue to look from super_m's holder's super.
4660 k = super_m->method_holder()->super();
4661 continue;
4662 }
4663
4664 k = k->super();
4665 }
4666 }
4667 }
4668 }
4669
4670
4671 // assumes that this_klass is an interface
4672 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4673 assert(this_klass != NULL, "invariant");
4674 assert(this_klass->is_interface(), "not an interface");
4675 const Array<Method*>* methods = this_klass->methods();
4676 const int num_methods = methods->length();
4677
4678 for (int index = 0; index < num_methods; index++) {
4679 const Method* const m = methods->at(index);
4680 // if m is static and not the init method, throw a verify error
4681 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4682 ResourceMark rm(THREAD);
4683 Exceptions::fthrow(
4684 THREAD_AND_LOCATION,
4685 vmSymbols::java_lang_VerifyError(),
4686 "Illegal static method %s in interface %s",
4687 m->name()->as_C_string(),
4688 this_klass->external_name()
4689 );
4690 return;
4691 }
4692 }
4693 }
4694
4695 // utility methods for format checking
4696
4697 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4698 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4699 const bool is_inline_type = (flags & JVM_ACC_INLINE) != 0;
4700 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4701 assert(supports_inline_types() || !is_inline_type, "JVM_ACC_INLINE should not be set");
4702 if (is_module) {
4703 ResourceMark rm(THREAD);
4704 Exceptions::fthrow(
4705 THREAD_AND_LOCATION,
4706 vmSymbols::java_lang_NoClassDefFoundError(),
4707 "%s is not a class because access_flag ACC_MODULE is set",
4708 _class_name->as_C_string());
4709 return;
4710 }
4711
4712 if (is_inline_type && !EnableValhalla) {
4713 ResourceMark rm(THREAD);
4714 Exceptions::fthrow(
4715 THREAD_AND_LOCATION,
4716 vmSymbols::java_lang_ClassFormatError(),
4717 "Class modifier ACC_INLINE in class %s requires option -XX:+EnableValhalla",
4718 _class_name->as_C_string()
4719 );
4720 return;
4721 }
4722
4723 if (!_need_verify) { return; }
4724
4725 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4726 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4727 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4728 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4729 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4730 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4731 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4732 const bool major_gte_14 = _major_version >= JAVA_14_VERSION;
4733
4734 if ((is_abstract && is_final) ||
4735 (is_interface && !is_abstract) ||
4736 (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4737 (!is_interface && major_gte_1_5 && is_annotation) ||
4738 (is_inline_type && (is_interface || is_abstract || is_enum || !is_final))) {
4739 ResourceMark rm(THREAD);
4740 const char* class_note = "";
4741 if (is_inline_type) class_note = " (an inline class)";
4742 Exceptions::fthrow(
4743 THREAD_AND_LOCATION,
4744 vmSymbols::java_lang_ClassFormatError(),
4745 "Illegal class modifiers in class %s%s: 0x%X",
4746 _class_name->as_C_string(), class_note, flags
4747 );
4748 return;
4749 }
4750 }
4751
4752 static bool has_illegal_visibility(jint flags) {
4753 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4754 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4755 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4756
4757 return ((is_public && is_protected) ||
4758 (is_public && is_private) ||
4759 (is_protected && is_private));
4760 }
4761
4762 // A legal major_version.minor_version must be one of the following:
4763 //
4764 // Major_version >= 45 and major_version < 56, any minor_version.
4765 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4766 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4767 //
4768 void ClassFileParser::verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4769 ResourceMark rm(THREAD);
4770 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4771 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4772 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid major version",
4773 class_name, major, minor, THREAD);
4774 return;
4775 }
4776
4777 if (major > max_version) {
4778 Exceptions::fthrow(
4779 THREAD_AND_LOCATION,
4780 vmSymbols::java_lang_UnsupportedClassVersionError(),
4781 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4782 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4783 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4784 return;
4785 }
4786
4787 if (major < JAVA_12_VERSION || minor == 0) {
4788 return;
4789 }
4790
4791 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4792 if (major != max_version) {
4793 Exceptions::fthrow(
4794 THREAD_AND_LOCATION,
4795 vmSymbols::java_lang_UnsupportedClassVersionError(),
4796 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4797 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4798 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4799 return;
4800 }
4801
4802 if (!Arguments::enable_preview()) {
4803 classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4804 class_name, major, minor, THREAD);
4805 return;
4806 }
4807
4808 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4809 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4810 class_name, major, minor, THREAD);
4811 }
4812 }
4813
4814 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4815 bool is_interface,
4816 bool is_inline_type,
4817 TRAPS) const {
4818 if (!_need_verify) { return; }
4819
4820 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4821 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4822 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4823 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4824 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4825 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4826 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4827 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4828 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4829
4830 bool is_illegal = false;
4831
4832 if (is_interface) {
4833 if (!is_public || !is_static || !is_final || is_private ||
4834 is_protected || is_volatile || is_transient ||
4835 (major_gte_1_5 && is_enum)) {
4836 is_illegal = true;
4837 }
4838 } else { // not interface
4839 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4840 is_illegal = true;
4841 } else {
4842 if (is_inline_type && !is_static && !is_final) {
4843 is_illegal = true;
4844 }
4845 }
4846 }
4847
4848 if (is_illegal) {
4849 ResourceMark rm(THREAD);
4850 Exceptions::fthrow(
4851 THREAD_AND_LOCATION,
4852 vmSymbols::java_lang_ClassFormatError(),
4853 "Illegal field modifiers in class %s: 0x%X",
4854 _class_name->as_C_string(), flags);
4855 return;
4856 }
4857 }
4858
4859 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4860 bool is_interface,
4861 bool is_inline_type,
4862 const Symbol* name,
4863 TRAPS) const {
4864 if (!_need_verify) { return; }
4865
4866 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4867 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4868 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4869 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4870 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4871 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4872 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4873 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4874 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4875 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4876 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4877 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4878 const bool major_gte_17 = _major_version >= JAVA_17_VERSION;
4879 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4880
4881 bool is_illegal = false;
4882
4883 const char* class_note = "";
4884 if (is_interface) {
4885 if (major_gte_8) {
4886 // Class file version is JAVA_8_VERSION or later Methods of
4887 // interfaces may set any of the flags except ACC_PROTECTED,
4888 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4889 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4890 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4891 (is_native || is_protected || is_final || is_synchronized) ||
4892 // If a specific method of a class or interface has its
4893 // ACC_ABSTRACT flag set, it must not have any of its
4894 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4895 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4896 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4897 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4898 (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
4899 is_illegal = true;
4900 }
4901 } else if (major_gte_1_5) {
4902 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4903 if (!is_public || is_private || is_protected || is_static || is_final ||
4904 is_synchronized || is_native || !is_abstract || is_strict) {
4905 is_illegal = true;
4906 }
4907 } else {
4908 // Class file version is pre-JAVA_1_5_VERSION
4909 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4910 is_illegal = true;
4911 }
4912 }
4913 } else { // not interface
4914 if (has_illegal_visibility(flags)) {
4915 is_illegal = true;
4916 } else {
4917 if (is_initializer) {
4918 if (is_final || is_synchronized || is_native ||
4919 is_abstract || (major_gte_1_5 && is_bridge)) {
4920 is_illegal = true;
4921 }
4922 if (!is_static && !is_inline_type) {
4923 // OK, an object constructor in a regular class
4924 } else if (is_static && is_inline_type) {
4925 // OK, a static init factory in an inline class
4926 } else {
4927 // but no other combinations are allowed
4928 is_illegal = true;
4929 class_note = (is_inline_type ? " (an inline class)" : " (not an inline class)");
4930 }
4931 } else { // not initializer
4932 if (is_inline_type && is_synchronized && !is_static) {
4933 is_illegal = true;
4934 class_note = " (an inline class)";
4935 } else {
4936 if (is_abstract) {
4937 if ((is_final || is_native || is_private || is_static ||
4938 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
4939 is_illegal = true;
4940 }
4941 }
4942 }
4943 }
4944 }
4945 }
4946
4947 if (is_illegal) {
4948 ResourceMark rm(THREAD);
4949 Exceptions::fthrow(
4950 THREAD_AND_LOCATION,
4951 vmSymbols::java_lang_ClassFormatError(),
4952 "Method %s in class %s%s has illegal modifiers: 0x%X",
4953 name->as_C_string(), _class_name->as_C_string(), class_note, flags);
4954 return;
4955 }
4956 }
4957
4958 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4959 int length,
4960 TRAPS) const {
4961 assert(_need_verify, "only called when _need_verify is true");
4962 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4963 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
4964 }
4965 }
4966
4967 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4968 // In class names, '/' separates unqualified names. This is verified in this function also.
4969 // Method names also may not contain the characters '<' or '>', unless <init>
4970 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4971 // method. Because these names have been checked as special cases before
4972 // calling this method in verify_legal_method_name.
4973 //
4974 // This method is also called from the modular system APIs in modules.cpp
4975 // to verify the validity of module and package names.
4976 bool ClassFileParser::verify_unqualified_name(const char* name,
4977 unsigned int length,
4978 int type) {
4979 if (length == 0) return false; // Must have at least one char.
4980 for (const char* p = name; p != name + length; p++) {
4981 switch(*p) {
4982 case JVM_SIGNATURE_DOT:
4983 case JVM_SIGNATURE_ENDCLASS:
4984 case JVM_SIGNATURE_ARRAY:
4985 // do not permit '.', ';', or '['
4986 return false;
4987 case JVM_SIGNATURE_SLASH:
4988 // check for '//' or leading or trailing '/' which are not legal
4989 // unqualified name must not be empty
4990 if (type == ClassFileParser::LegalClass) {
4991 if (p == name || p+1 >= name+length ||
4992 *(p+1) == JVM_SIGNATURE_SLASH) {
4993 return false;
4994 }
4995 } else {
4996 return false; // do not permit '/' unless it's class name
4997 }
4998 break;
4999 case JVM_SIGNATURE_SPECIAL:
5000 case JVM_SIGNATURE_ENDSPECIAL:
5001 // do not permit '<' or '>' in method names
5002 if (type == ClassFileParser::LegalMethod) {
5003 return false;
5004 }
5005 }
5006 }
5007 return true;
5008 }
5009
5010 // Take pointer to a UTF8 byte string (not NUL-terminated).
5011 // Skip over the longest part of the string that could
5012 // be taken as a fieldname. Allow '/' if slash_ok is true.
5013 // Return a pointer to just past the fieldname.
5014 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5015 // being true, we saw consecutive slashes (meaning we were looking for a
5016 // qualified path but found something that was badly-formed).
5017 static const char* skip_over_field_name(const char* const name,
5018 bool slash_ok,
5019 unsigned int length) {
5020 const char* p;
5021 jboolean last_is_slash = false;
5022 jboolean not_first_ch = false;
5023
5024 for (p = name; p != name + length; not_first_ch = true) {
5025 const char* old_p = p;
5026 jchar ch = *p;
5027 if (ch < 128) {
5028 p++;
5029 // quick check for ascii
5030 if ((ch >= 'a' && ch <= 'z') ||
5031 (ch >= 'A' && ch <= 'Z') ||
5032 (ch == '_' || ch == '$') ||
5033 (not_first_ch && ch >= '0' && ch <= '9')) {
5034 last_is_slash = false;
5035 continue;
5036 }
5037 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
5038 if (last_is_slash) {
5039 return NULL; // Don't permit consecutive slashes
5040 }
5041 last_is_slash = true;
5042 continue;
5043 }
5044 }
5045 else {
5046 jint unicode_ch;
5047 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5048 p = tmp_p;
5049 last_is_slash = false;
5050 // Check if ch is Java identifier start or is Java identifier part
5051 // 4672820: call java.lang.Character methods directly without generating separate tables.
5052 EXCEPTION_MARK;
5053 // return value
5054 JavaValue result(T_BOOLEAN);
5055 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5056 JavaCallArguments args;
5057 args.push_int(unicode_ch);
5058
5059 if (not_first_ch) {
5060 // public static boolean isJavaIdentifierPart(char ch);
5061 JavaCalls::call_static(&result,
5062 vmClasses::Character_klass(),
5063 vmSymbols::isJavaIdentifierPart_name(),
5064 vmSymbols::int_bool_signature(),
5065 &args,
5066 THREAD);
5067 } else {
5068 // public static boolean isJavaIdentifierStart(char ch);
5069 JavaCalls::call_static(&result,
5070 vmClasses::Character_klass(),
5071 vmSymbols::isJavaIdentifierStart_name(),
5072 vmSymbols::int_bool_signature(),
5073 &args,
5074 THREAD);
5075 }
5076 if (HAS_PENDING_EXCEPTION) {
5077 CLEAR_PENDING_EXCEPTION;
5078 return NULL;
5079 }
5080 if(result.get_jboolean()) {
5081 continue;
5082 }
5083 }
5084 return (not_first_ch) ? old_p : NULL;
5085 }
5086 return (not_first_ch) ? p : NULL;
5087 }
5088
5089 // Take pointer to a UTF8 byte string (not NUL-terminated).
5090 // Skip over the longest part of the string that could
5091 // be taken as a field signature. Allow "void" if void_ok.
5092 // Return a pointer to just past the signature.
5093 // Return NULL if no legal signature is found.
5094 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5095 bool void_ok,
5096 unsigned int length,
5097 TRAPS) const {
5098 unsigned int array_dim = 0;
5099 while (length > 0) {
5100 switch (signature[0]) {
5101 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5102 case JVM_SIGNATURE_BOOLEAN:
5103 case JVM_SIGNATURE_BYTE:
5104 case JVM_SIGNATURE_CHAR:
5105 case JVM_SIGNATURE_SHORT:
5106 case JVM_SIGNATURE_INT:
5107 case JVM_SIGNATURE_FLOAT:
5108 case JVM_SIGNATURE_LONG:
5109 case JVM_SIGNATURE_DOUBLE:
5110 return signature + 1;
5111 case JVM_SIGNATURE_INLINE_TYPE:
5112 // Can't enable this check until JDK upgrades the bytecode generators
5113 // if (_major_version < CONSTANT_CLASS_DESCRIPTORS ) {
5114 // classfile_parse_error("Class name contains illegal Q-signature "
5115 // "in descriptor in class file %s",
5116 // CHECK_0);
5117 // }
5118 // fall through
5119 case JVM_SIGNATURE_CLASS:
5120 {
5121 if (_major_version < JAVA_1_5_VERSION) {
5122 // Skip over the class name if one is there
5123 const char* const p = skip_over_field_name(signature + 1, true, --length);
5124
5125 // The next character better be a semicolon
5126 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
5127 return p + 1;
5128 }
5129 }
5130 else {
5131 // Skip leading 'L' or 'Q' and ignore first appearance of ';'
5132 signature++;
5133 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
5134 // Format check signature
5135 if (c != NULL) {
5136 int newlen = c - (char*) signature;
5137 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5138 if (!legal) {
5139 classfile_parse_error("Class name is empty or contains illegal character "
5140 "in descriptor in class file %s",
5141 THREAD);
5142 return NULL;
5143 }
5144 return signature + newlen + 1;
5145 }
5146 }
5147 return NULL;
5148 }
5149 case JVM_SIGNATURE_ARRAY:
5150 array_dim++;
5151 if (array_dim > 255) {
5152 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5153 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", THREAD);
5154 return NULL;
5155 }
5156 // The rest of what's there better be a legal signature
5157 signature++;
5158 length--;
5159 void_ok = false;
5160 break;
5161 default:
5162 return NULL;
5163 }
5164 }
5165 return NULL;
5166 }
5167
5168 // Checks if name is a legal class name.
5169 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5170 if (!_need_verify || _relax_verify) { return; }
5171
5172 assert(name->refcount() > 0, "symbol must be kept alive");
5173 char* bytes = (char*)name->bytes();
5174 unsigned int length = name->utf8_length();
5175 bool legal = false;
5176
5177 if (length > 0) {
5178 const char* p;
5179 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5180 p = skip_over_field_signature(bytes, false, length, CHECK);
5181 legal = (p != NULL) && ((p - bytes) == (int)length);
5182 } else if (_major_version < JAVA_1_5_VERSION) {
5183 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5184 p = skip_over_field_name(bytes, true, length);
5185 legal = (p != NULL) && ((p - bytes) == (int)length);
5186 }
5187 } else if ((_major_version >= CONSTANT_CLASS_DESCRIPTORS || _class_name->starts_with("jdk/internal/reflect/"))
5188 && bytes[length - 1] == ';' ) {
5189 // Support for L...; and Q...; descriptors
5190 legal = verify_unqualified_name(bytes + 1, length - 2, LegalClass);
5191 } else {
5192 // 4900761: relax the constraints based on JSR202 spec
5193 // Class names may be drawn from the entire Unicode character set.
5194 // Identifiers between '/' must be unqualified names.
5195 // The utf8 string has been verified when parsing cpool entries.
5196 legal = verify_unqualified_name(bytes, length, LegalClass);
5197 }
5198 }
5199 if (!legal) {
5200 ResourceMark rm(THREAD);
5201 assert(_class_name != NULL, "invariant");
5202 Exceptions::fthrow(
5203 THREAD_AND_LOCATION,
5204 vmSymbols::java_lang_ClassFormatError(),
5205 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5206 _class_name->as_C_string()
5207 );
5208 return;
5209 }
5210 }
5211
5212 // Checks if name is a legal field name.
5213 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5214 if (!_need_verify || _relax_verify) { return; }
5215
5216 char* bytes = (char*)name->bytes();
5217 unsigned int length = name->utf8_length();
5218 bool legal = false;
5219
5220 if (length > 0) {
5221 if (_major_version < JAVA_1_5_VERSION) {
5222 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5223 const char* p = skip_over_field_name(bytes, false, length);
5224 legal = (p != NULL) && ((p - bytes) == (int)length);
5225 }
5226 } else {
5227 // 4881221: relax the constraints based on JSR202 spec
5228 legal = verify_unqualified_name(bytes, length, LegalField);
5229 }
5230 }
5231
5232 if (!legal) {
5233 ResourceMark rm(THREAD);
5234 assert(_class_name != NULL, "invariant");
5235 Exceptions::fthrow(
5236 THREAD_AND_LOCATION,
5237 vmSymbols::java_lang_ClassFormatError(),
5238 "Illegal field name \"%.*s\" in class %s", length, bytes,
5239 _class_name->as_C_string()
5240 );
5241 return;
5242 }
5243 }
5244
5245 // Checks if name is a legal method name.
5246 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5247 if (!_need_verify || _relax_verify) { return; }
5248
5249 assert(name != NULL, "method name is null");
5250 char* bytes = (char*)name->bytes();
5251 unsigned int length = name->utf8_length();
5252 bool legal = false;
5253
5254 if (length > 0) {
5255 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
5256 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5257 legal = true;
5258 }
5259 } else if (_major_version < JAVA_1_5_VERSION) {
5260 const char* p;
5261 p = skip_over_field_name(bytes, false, length);
5262 legal = (p != NULL) && ((p - bytes) == (int)length);
5263 } else {
5264 // 4881221: relax the constraints based on JSR202 spec
5265 legal = verify_unqualified_name(bytes, length, LegalMethod);
5266 }
5267 }
5268
5269 if (!legal) {
5270 ResourceMark rm(THREAD);
5271 assert(_class_name != NULL, "invariant");
5272 Exceptions::fthrow(
5273 THREAD_AND_LOCATION,
5274 vmSymbols::java_lang_ClassFormatError(),
5275 "Illegal method name \"%.*s\" in class %s", length, bytes,
5276 _class_name->as_C_string()
5277 );
5278 return;
5279 }
5280 }
5281
5282
5283 // Checks if signature is a legal field signature.
5284 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5285 const Symbol* signature,
5286 TRAPS) const {
5287 if (!_need_verify) { return; }
5288 if (!supports_inline_types() && (signature->is_Q_signature() || signature->is_Q_array_signature())) {
5289 throwIllegalSignature("Field", name, signature, CHECK);
5290 }
5291
5292 const char* const bytes = (const char* const)signature->bytes();
5293 const unsigned int length = signature->utf8_length();
5294 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5295
5296 if (p == NULL || (p - bytes) != (int)length) {
5297 throwIllegalSignature("Field", name, signature, CHECK);
5298 }
5299 }
5300
5301 // Check that the signature is compatible with the method name. For example,
5302 // check that <init> has a void signature.
5303 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
5304 const Symbol* signature,
5305 TRAPS) const {
5306 if (!_need_verify) {
5307 return;
5308 }
5309
5310 // Class initializers cannot have args for class format version >= 51.
5311 if (name == vmSymbols::class_initializer_name() &&
5312 signature != vmSymbols::void_method_signature() &&
5313 _major_version >= JAVA_7_VERSION) {
5314 throwIllegalSignature("Method", name, signature, THREAD);
5315 return;
5316 }
5317
5318 if (!is_inline_type()) {
5319 int sig_length = signature->utf8_length();
5320 if (name->utf8_length() > 0 &&
5321 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
5322 sig_length > 0 &&
5323 signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
5324 throwIllegalSignature("Method", name, signature, THREAD);
5325 }
5326 }
5327 }
5328
5329 // Checks if signature is a legal method signature.
5330 // Returns number of parameters
5331 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5332 const Symbol* signature,
5333 TRAPS) const {
5334 if (!_need_verify) {
5335 // make sure caller's args_size will be less than 0 even for non-static
5336 // method so it will be recomputed in compute_size_of_parameters().
5337 return -2;
5338 }
5339
5340 unsigned int args_size = 0;
5341 const char* p = (const char*)signature->bytes();
5342 unsigned int length = signature->utf8_length();
5343 const char* nextp;
5344
5345 // The first character must be a '('
5346 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5347 length--;
5348 // Skip over legal field signatures
5349 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5350 while ((length > 0) && (nextp != NULL)) {
5351 args_size++;
5352 if (p[0] == 'J' || p[0] == 'D') {
5353 args_size++;
5354 }
5355 length -= nextp - p;
5356 p = nextp;
5357 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5358 }
5359 // The first non-signature thing better be a ')'
5360 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5361 length--;
5362 // Now we better just have a return value
5363 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5364 if (nextp && ((int)length == (nextp - p))) {
5365 return args_size;
5366 }
5367 }
5368 }
5369 // Report error
5370 throwIllegalSignature("Method", name, signature, THREAD);
5371 return 0;
5372 }
5373
5374 int ClassFileParser::static_field_size() const {
5375 assert(_field_info != NULL, "invariant");
5376 return _field_info->_static_field_size;
5377 }
5378
5379 int ClassFileParser::total_oop_map_count() const {
5380 assert(_field_info != NULL, "invariant");
5381 return _field_info->oop_map_blocks->_nonstatic_oop_map_count;
5382 }
5383
5384 jint ClassFileParser::layout_size() const {
5385 assert(_field_info != NULL, "invariant");
5386 return _field_info->_instance_size;
5387 }
5388
5389 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5390 const Array<Method*>* methods) {
5391 assert(ik != NULL, "invariant");
5392 assert(methods != NULL, "invariant");
5393
5394 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5395 // (We used to do this lazily, but now we query it in Rewriter,
5396 // which is eagerly done for every method, so we might as well do it now,
5397 // when everything is fresh in memory.)
5398 const vmSymbolID klass_id = Method::klass_id_for_intrinsics(ik);
5399
5400 if (klass_id != vmSymbolID::NO_SID) {
5401 for (int j = 0; j < methods->length(); ++j) {
5402 Method* method = methods->at(j);
5403 method->init_intrinsic_id(klass_id);
5404
5405 if (CheckIntrinsics) {
5406 // Check if an intrinsic is defined for method 'method',
5407 // but the method is not annotated with @IntrinsicCandidate.
5408 if (method->intrinsic_id() != vmIntrinsics::_none &&
5409 !method->intrinsic_candidate()) {
5410 tty->print("Compiler intrinsic is defined for method [%s], "
5411 "but the method is not annotated with @IntrinsicCandidate.%s",
5412 method->name_and_sig_as_C_string(),
5413 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5414 );
5415 tty->cr();
5416 DEBUG_ONLY(vm_exit(1));
5417 }
5418 // Check is the method 'method' is annotated with @IntrinsicCandidate,
5419 // but there is no intrinsic available for it.
5420 if (method->intrinsic_candidate() &&
5421 method->intrinsic_id() == vmIntrinsics::_none) {
5422 tty->print("Method [%s] is annotated with @IntrinsicCandidate, "
5423 "but no compiler intrinsic is defined for the method.%s",
5424 method->name_and_sig_as_C_string(),
5425 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5426 );
5427 tty->cr();
5428 DEBUG_ONLY(vm_exit(1));
5429 }
5430 }
5431 } // end for
5432
5433 #ifdef ASSERT
5434 if (CheckIntrinsics) {
5435 // Check for orphan methods in the current class. A method m
5436 // of a class C is orphan if an intrinsic is defined for method m,
5437 // but class C does not declare m.
5438 // The check is potentially expensive, therefore it is available
5439 // only in debug builds.
5440
5441 for (auto id : EnumRange<vmIntrinsicID>{}) {
5442 if (vmIntrinsics::_compiledLambdaForm == id) {
5443 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5444 // generated for the JVM from a LambdaForm and therefore no method
5445 // is defined for it.
5446 continue;
5447 }
5448 if (vmIntrinsics::_blackhole == id) {
5449 // The _blackhole intrinsic is a special marker. No explicit method
5450 // is defined for it.
5451 continue;
5452 }
5453
5454 if (vmIntrinsics::class_for(id) == klass_id) {
5455 // Check if the current class contains a method with the same
5456 // name, flags, signature.
5457 bool match = false;
5458 for (int j = 0; j < methods->length(); ++j) {
5459 const Method* method = methods->at(j);
5460 if (method->intrinsic_id() == id) {
5461 match = true;
5462 break;
5463 }
5464 }
5465
5466 if (!match) {
5467 char buf[1000];
5468 tty->print("Compiler intrinsic is defined for method [%s], "
5469 "but the method is not available in class [%s].%s",
5470 vmIntrinsics::short_name_as_C_string(id, buf, sizeof(buf)),
5471 ik->name()->as_C_string(),
5472 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5473 );
5474 tty->cr();
5475 DEBUG_ONLY(vm_exit(1));
5476 }
5477 }
5478 } // end for
5479 } // CheckIntrinsics
5480 #endif // ASSERT
5481 }
5482 }
5483
5484 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
5485 const ClassInstanceInfo& cl_inst_info,
5486 TRAPS) {
5487 if (_klass != NULL) {
5488 return _klass;
5489 }
5490
5491 InstanceKlass* const ik =
5492 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5493
5494 if (is_hidden()) {
5495 mangle_hidden_class_name(ik);
5496 }
5497
5498 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5499
5500 assert(_klass == ik, "invariant");
5501
5502 if (ik->is_inline_klass()) {
5503 InlineKlass* vk = InlineKlass::cast(ik);
5504 oop val = ik->allocate_instance(CHECK_NULL);
5505 vk->set_default_value(val);
5506 }
5507
5508 return ik;
5509 }
5510
5511 // Return true if the specified class is not a valid super class for an inline type.
5512 // A valid super class for an inline type is abstract, has no instance fields,
5513 // does not implement interface java.lang.IdentityObject (checked elsewhere), has
5514 // an empty body-less no-arg constructor, and no synchronized instance methods.
5515 // This function doesn't check if the class's super types are invalid. Those checks
5516 // are done elsewhere. The final determination of whether or not a class is an
5517 // invalid super type for an inline class is done in fill_instance_klass().
5518 bool ClassFileParser::is_invalid_super_for_inline_type() {
5519 if (class_name() == vmSymbols::java_lang_IdentityObject()) {
5520 return true;
5521 }
5522 if (is_interface() || class_name() == vmSymbols::java_lang_Object()) {
5523 return false;
5524 }
5525 if (!access_flags().is_abstract() || _has_nonstatic_fields) {
5526 return true;
5527 } else {
5528 // Look at each method
5529 for (int x = 0; x < _methods->length(); x++) {
5530 const Method* const method = _methods->at(x);
5531 if (method->is_synchronized() && !method->is_static()) {
5532 return true;
5533
5534 } else if (method->name() == vmSymbols::object_initializer_name()) {
5535 if (method->signature() != vmSymbols::void_method_signature() ||
5536 !method->is_vanilla_constructor()) {
5537 return true;
5538 }
5539 }
5540 }
5541 }
5542 return false;
5543 }
5544
5545 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5546 bool changed_by_loadhook,
5547 const ClassInstanceInfo& cl_inst_info,
5548 TRAPS) {
5549 assert(ik != NULL, "invariant");
5550
5551 // Set name and CLD before adding to CLD
5552 ik->set_class_loader_data(_loader_data);
5553 ik->set_name(_class_name);
5554
5555 // Add all classes to our internal class loader list here,
5556 // including classes in the bootstrap (NULL) class loader.
5557 const bool publicize = !is_internal();
5558
5559 _loader_data->add_class(ik, publicize);
5560
5561 set_klass_to_deallocate(ik);
5562
5563 assert(_field_info != NULL, "invariant");
5564 assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5565 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5566 "sanity");
5567
5568 assert(ik->is_instance_klass(), "sanity");
5569 assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5570
5571 // Fill in information already parsed
5572 ik->set_should_verify_class(_need_verify);
5573
5574 // Not yet: supers are done below to support the new subtype-checking fields
5575 ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5576 ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
5577 if (_field_info->_is_naturally_atomic && ik->is_inline_klass()) {
5578 ik->set_is_naturally_atomic();
5579 }
5580
5581 if (this->_invalid_inline_super) {
5582 ik->set_invalid_inline_super();
5583 }
5584
5585 if (_has_injected_identityObject) {
5586 ik->set_has_injected_identityObject();
5587 }
5588 if (_has_injected_primitiveObject) {
5589 ik->set_has_injected_primitiveObject();
5590 }
5591
5592 assert(_fac != NULL, "invariant");
5593 ik->set_static_oop_field_count(_fac->count[STATIC_OOP] + _fac->count[STATIC_INLINE]);
5594
5595 // this transfers ownership of a lot of arrays from
5596 // the parser onto the InstanceKlass*
5597 apply_parsed_class_metadata(ik, _java_fields_count);
5598
5599 // can only set dynamic nest-host after static nest information is set
5600 if (cl_inst_info.dynamic_nest_host() != NULL) {
5601 ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5602 }
5603
5604 // note that is not safe to use the fields in the parser from this point on
5605 assert(NULL == _cp, "invariant");
5606 assert(NULL == _fields, "invariant");
5607 assert(NULL == _methods, "invariant");
5608 assert(NULL == _inner_classes, "invariant");
5609 assert(NULL == _nest_members, "invariant");
5610 assert(NULL == _combined_annotations, "invariant");
5611 assert(NULL == _record_components, "invariant");
5612 assert(NULL == _permitted_subclasses, "invariant");
5613
5614 if (_has_final_method) {
5615 ik->set_has_final_method();
5616 }
5617
5618 ik->copy_method_ordering(_method_ordering, CHECK);
5619 // The InstanceKlass::_methods_jmethod_ids cache
5620 // is managed on the assumption that the initial cache
5621 // size is equal to the number of methods in the class. If
5622 // that changes, then InstanceKlass::idnum_can_increment()
5623 // has to be changed accordingly.
5624 ik->set_initial_method_idnum(ik->methods()->length());
5625
5626 ik->set_this_class_index(_this_class_index);
5627
5628 if (_is_hidden) {
5629 // _this_class_index is a CONSTANT_Class entry that refers to this
5630 // hidden class itself. If this class needs to refer to its own methods
5631 // or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5632 // _this_class_index. However, because this class is hidden (it's
5633 // not stored in SystemDictionary), _this_class_index cannot be resolved
5634 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5635 // Therefore, we must eagerly resolve _this_class_index now.
5636 ik->constants()->klass_at_put(_this_class_index, ik);
5637 }
5638
5639 ik->set_minor_version(_minor_version);
5640 ik->set_major_version(_major_version);
5641 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5642 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5643 if (_is_declared_atomic) {
5644 ik->set_is_declared_atomic();
5645 }
5646
5647 if (_is_hidden) {
5648 ik->set_is_hidden();
5649 }
5650
5651 // Set PackageEntry for this_klass
5652 oop cl = ik->class_loader();
5653 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5654 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5655 ik->set_package(cld, NULL, CHECK);
5656
5657 const Array<Method*>* const methods = ik->methods();
5658 assert(methods != NULL, "invariant");
5659 const int methods_len = methods->length();
5660
5661 check_methods_for_intrinsics(ik, methods);
5662
5663 // Fill in field values obtained by parse_classfile_attributes
5664 if (_parsed_annotations->has_any_annotations()) {
5665 _parsed_annotations->apply_to(ik);
5666 }
5667
5668 apply_parsed_class_attributes(ik);
5669
5670 // Miranda methods
5671 if ((_num_miranda_methods > 0) ||
5672 // if this class introduced new miranda methods or
5673 (_super_klass != NULL && _super_klass->has_miranda_methods())
5674 // super class exists and this class inherited miranda methods
5675 ) {
5676 ik->set_has_miranda_methods(); // then set a flag
5677 }
5678
5679 // Fill in information needed to compute superclasses.
5680 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5681 ik->set_transitive_interfaces(_transitive_interfaces);
5682 ik->set_local_interfaces(_local_interfaces);
5683 _transitive_interfaces = NULL;
5684 _local_interfaces = NULL;
5685
5686 // Initialize itable offset tables
5687 klassItable::setup_itable_offset_table(ik);
5688
5689 // Compute transitive closure of interfaces this class implements
5690 // Do final class setup
5691 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5692 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5693 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5694 }
5695
5696 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5697 ( _super_klass != NULL && _super_klass->has_contended_annotations())) {
5698 ik->set_has_contended_annotations(true);
5699 }
5700
5701 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5702 set_precomputed_flags(ik);
5703
5704 // check if this class can access its super class
5705 check_super_class_access(ik, CHECK);
5706
5707 // check if this class can access its superinterfaces
5708 check_super_interface_access(ik, CHECK);
5709
5710 // check if this class overrides any final method
5711 check_final_method_override(ik, CHECK);
5712
5713 // reject static interface methods prior to Java 8
5714 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5715 check_illegal_static_method(ik, CHECK);
5716 }
5717
5718 // Obtain this_klass' module entry
5719 ModuleEntry* module_entry = ik->module();
5720 assert(module_entry != NULL, "module_entry should always be set");
5721
5722 // Obtain java.lang.Module
5723 Handle module_handle(THREAD, module_entry->module());
5724
5725 // Allocate mirror and initialize static fields
5726 // The create_mirror() call will also call compute_modifiers()
5727 java_lang_Class::create_mirror(ik,
5728 Handle(THREAD, _loader_data->class_loader()),
5729 module_handle,
5730 _protection_domain,
5731 cl_inst_info.class_data(),
5732 CHECK);
5733
5734 assert(_all_mirandas != NULL, "invariant");
5735
5736 // Generate any default methods - default methods are public interface methods
5737 // that have a default implementation. This is new with Java 8.
5738 if (_has_nonstatic_concrete_methods) {
5739 DefaultMethods::generate_default_methods(ik,
5740 _all_mirandas,
5741 CHECK);
5742 }
5743
5744 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5745 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5746 !module_entry->has_default_read_edges()) {
5747 if (!module_entry->set_has_default_read_edges()) {
5748 // We won a potential race
5749 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5750 }
5751 }
5752
5753 bool all_fields_empty = true;
5754 int nfields = ik->java_fields_count();
5755 if (ik->is_inline_klass()) nfields++;
5756 for (int i = 0; i < nfields; i++) {
5757 if (((ik->field_access_flags(i) & JVM_ACC_STATIC) == 0)) {
5758 if (ik->field_is_null_free_inline_type(i)) {
5759 Symbol* klass_name = ik->field_signature(i)->fundamental_name(CHECK);
5760 // Inline classes for instance fields must have been pre-loaded
5761 // Inline classes for static fields might not have been loaded yet
5762 InstanceKlass* klass = SystemDictionary::find_instance_klass(klass_name,
5763 Handle(THREAD, ik->class_loader()),
5764 Handle(THREAD, ik->protection_domain()));
5765 assert(klass != NULL, "Just checking");
5766 assert(klass->access_flags().is_inline_type(), "Inline type expected");
5767 ik->set_inline_type_field_klass(i, klass);
5768 klass_name->decrement_refcount();
5769 if (!InlineKlass::cast(klass)->is_empty_inline_type()) { all_fields_empty = false; }
5770 } else {
5771 all_fields_empty = false;
5772 }
5773 } else if (is_inline_type() && ((ik->field_access_flags(i) & JVM_ACC_FIELD_INTERNAL) != 0)) {
5774 InlineKlass::cast(ik)->set_default_value_offset(ik->field_offset(i));
5775 }
5776 }
5777
5778 if (_is_empty_inline_type || (is_inline_type() && all_fields_empty)) {
5779 ik->set_is_empty_inline_type();
5780 }
5781
5782 if (is_inline_type()) {
5783 InlineKlass* vk = InlineKlass::cast(ik);
5784 vk->set_alignment(_alignment);
5785 vk->set_first_field_offset(_first_field_offset);
5786 vk->set_exact_size_in_bytes(_exact_size_in_bytes);
5787 InlineKlass::cast(ik)->initialize_calling_convention(CHECK);
5788 }
5789
5790 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5791
5792 if (!is_internal()) {
5793 ik->print_class_load_logging(_loader_data, module_entry, _stream);
5794
5795 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5796 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5797 log_is_enabled(Info, class, preview)) {
5798 ResourceMark rm;
5799 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5800 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5801 }
5802
5803 if (log_is_enabled(Debug, class, resolve)) {
5804 ResourceMark rm;
5805 // print out the superclass.
5806 const char * from = ik->external_name();
5807 if (ik->java_super() != NULL) {
5808 log_debug(class, resolve)("%s %s (super)",
5809 from,
5810 ik->java_super()->external_name());
5811 }
5812 // print out each of the interface classes referred to by this class.
5813 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5814 if (local_interfaces != NULL) {
5815 const int length = local_interfaces->length();
5816 for (int i = 0; i < length; i++) {
5817 const InstanceKlass* const k = local_interfaces->at(i);
5818 const char * to = k->external_name();
5819 log_debug(class, resolve)("%s %s (interface)", from, to);
5820 }
5821 }
5822 }
5823 }
5824
5825 JFR_ONLY(INIT_ID(ik);)
5826
5827 // If we reach here, all is well.
5828 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5829 // in order for it to not be destroyed in the ClassFileParser destructor.
5830 set_klass_to_deallocate(NULL);
5831
5832 // it's official
5833 set_klass(ik);
5834
5835 // the common single interface arrays need setup here to provide the
5836 // correct answer to "compute_transitive_interfaces()", during
5837 // "SystemDictionary::initialize()"
5838 if (ik->name() == vmSymbols::java_lang_IdentityObject()) {
5839 Universe::initialize_the_single_IdentityObject_klass_array(ik, CHECK);
5840 }
5841 if (ik->name() == vmSymbols::java_lang_PrimitiveObject()) {
5842 Universe::initialize_the_single_PrimitiveObject_klass_array(ik, CHECK);
5843 }
5844
5845 debug_only(ik->verify();)
5846 }
5847
5848 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5849 // Decrement the refcount in the old name, since we're clobbering it.
5850 _class_name->decrement_refcount();
5851
5852 _class_name = new_class_name;
5853 // Increment the refcount of the new name.
5854 // Now the ClassFileParser owns this name and will decrement in
5855 // the destructor.
5856 _class_name->increment_refcount();
5857 }
5858
5859 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5860 bool trusted = loader_data->is_boot_class_loader_data() ||
5861 loader_data->is_platform_class_loader_data();
5862 bool need_verify =
5863 // verifyAll
5864 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5865 // verifyRemote
5866 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5867 return !need_verify;
5868 }
5869
5870 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5871 Symbol* name,
5872 ClassLoaderData* loader_data,
5873 const ClassLoadInfo* cl_info,
5874 Publicity pub_level,
5875 TRAPS) :
5876 _stream(stream),
5877 _class_name(NULL),
5878 _loader_data(loader_data),
5879 _is_hidden(cl_info->is_hidden()),
5880 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5881 _orig_cp_size(0),
5882 _super_klass(),
5883 _cp(NULL),
5884 _fields(NULL),
5885 _methods(NULL),
5886 _inner_classes(NULL),
5887 _nest_members(NULL),
5888 _nest_host(0),
5889 _permitted_subclasses(NULL),
5890 _record_components(NULL),
5891 _temp_local_interfaces(NULL),
5892 _local_interfaces(NULL),
5893 _transitive_interfaces(NULL),
5894 _combined_annotations(NULL),
5895 _class_annotations(NULL),
5896 _class_type_annotations(NULL),
5897 _fields_annotations(NULL),
5898 _fields_type_annotations(NULL),
5899 _klass(NULL),
5900 _klass_to_deallocate(NULL),
5901 _parsed_annotations(NULL),
5902 _fac(NULL),
5903 _field_info(NULL),
5904 _method_ordering(NULL),
5905 _all_mirandas(NULL),
5906 _vtable_size(0),
5907 _itable_size(0),
5908 _num_miranda_methods(0),
5909 _rt(REF_NONE),
5910 _protection_domain(cl_info->protection_domain()),
5911 _access_flags(),
5912 _pub_level(pub_level),
5913 _bad_constant_seen(0),
5914 _synthetic_flag(false),
5915 _sde_length(false),
5916 _sde_buffer(NULL),
5917 _sourcefile_index(0),
5918 _generic_signature_index(0),
5919 _major_version(0),
5920 _minor_version(0),
5921 _this_class_index(0),
5922 _super_class_index(0),
5923 _itfs_len(0),
5924 _java_fields_count(0),
5925 _need_verify(false),
5926 _relax_verify(false),
5927 _has_nonstatic_concrete_methods(false),
5928 _declares_nonstatic_concrete_methods(false),
5929 _has_final_method(false),
5930 _has_contended_fields(false),
5931 _has_inline_type_fields(false),
5932 _has_nonstatic_fields(false),
5933 _is_empty_inline_type(false),
5934 _is_naturally_atomic(false),
5935 _is_declared_atomic(false),
5936 _invalid_inline_super(false),
5937 _invalid_identity_super(false),
5938 _implements_identityObject(false),
5939 _has_injected_identityObject(false),
5940 _implements_primitiveObject(false),
5941 _has_injected_primitiveObject(false),
5942 _has_finalizer(false),
5943 _has_empty_finalizer(false),
5944 _has_vanilla_constructor(false),
5945 _max_bootstrap_specifier_index(-1) {
5946
5947 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5948 _class_name->increment_refcount();
5949
5950 assert(_loader_data != NULL, "invariant");
5951 assert(stream != NULL, "invariant");
5952 assert(_stream != NULL, "invariant");
5953 assert(_stream->buffer() == _stream->current(), "invariant");
5954 assert(_class_name != NULL, "invariant");
5955 assert(0 == _access_flags.as_int(), "invariant");
5956
5957 // Figure out whether we can skip format checking (matching classic VM behavior)
5958 if (DumpSharedSpaces) {
5959 // verify == true means it's a 'remote' class (i.e., non-boot class)
5960 // Verification decision is based on BytecodeVerificationRemote flag
5961 // for those classes.
5962 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5963 BytecodeVerificationLocal;
5964 }
5965 else {
5966 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5967 stream->need_verify());
5968 }
5969
5970 // synch back verification state to stream
5971 stream->set_verify(_need_verify);
5972
5973 // Check if verification needs to be relaxed for this class file
5974 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5975 _relax_verify = relax_format_check_for(_loader_data);
5976
5977 parse_stream(stream, CHECK);
5978
5979 post_process_parsed_stream(stream, _cp, CHECK);
5980 }
5981
5982 void ClassFileParser::clear_class_metadata() {
5983 // metadata created before the instance klass is created. Must be
5984 // deallocated if classfile parsing returns an error.
5985 _cp = NULL;
5986 _fields = NULL;
5987 _methods = NULL;
5988 _inner_classes = NULL;
5989 _nest_members = NULL;
5990 _permitted_subclasses = NULL;
5991 _combined_annotations = NULL;
5992 _class_annotations = _class_type_annotations = NULL;
5993 _fields_annotations = _fields_type_annotations = NULL;
5994 _record_components = NULL;
5995 }
5996
5997 // Destructor to clean up
5998 ClassFileParser::~ClassFileParser() {
5999 _class_name->decrement_refcount();
6000
6001 if (_cp != NULL) {
6002 MetadataFactory::free_metadata(_loader_data, _cp);
6003 }
6004 if (_fields != NULL) {
6005 MetadataFactory::free_array<u2>(_loader_data, _fields);
6006 }
6007
6008 if (_methods != NULL) {
6009 // Free methods
6010 InstanceKlass::deallocate_methods(_loader_data, _methods);
6011 }
6012
6013 // beware of the Universe::empty_blah_array!!
6014 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
6015 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
6016 }
6017
6018 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
6019 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
6020 }
6021
6022 if (_record_components != NULL) {
6023 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
6024 }
6025
6026 if (_permitted_subclasses != NULL && _permitted_subclasses != Universe::the_empty_short_array()) {
6027 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
6028 }
6029
6030 // Free interfaces
6031 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
6032 _local_interfaces, _transitive_interfaces);
6033
6034 if (_combined_annotations != NULL) {
6035 // After all annotations arrays have been created, they are installed into the
6036 // Annotations object that will be assigned to the InstanceKlass being created.
6037
6038 // Deallocate the Annotations object and the installed annotations arrays.
6039 _combined_annotations->deallocate_contents(_loader_data);
6040
6041 // If the _combined_annotations pointer is non-NULL,
6042 // then the other annotations fields should have been cleared.
6043 assert(_class_annotations == NULL, "Should have been cleared");
6044 assert(_class_type_annotations == NULL, "Should have been cleared");
6045 assert(_fields_annotations == NULL, "Should have been cleared");
6046 assert(_fields_type_annotations == NULL, "Should have been cleared");
6047 } else {
6048 // If the annotations arrays were not installed into the Annotations object,
6049 // then they have to be deallocated explicitly.
6050 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
6051 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
6052 Annotations::free_contents(_loader_data, _fields_annotations);
6053 Annotations::free_contents(_loader_data, _fields_type_annotations);
6054 }
6055
6056 clear_class_metadata();
6057 _transitive_interfaces = NULL;
6058 _local_interfaces = NULL;
6059
6060 // deallocate the klass if already created. Don't directly deallocate, but add
6061 // to the deallocate list so that the klass is removed from the CLD::_klasses list
6062 // at a safepoint.
6063 if (_klass_to_deallocate != NULL) {
6064 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6065 }
6066 }
6067
6068 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6069 TRAPS) {
6070
6071 assert(stream != NULL, "invariant");
6072 assert(_class_name != NULL, "invariant");
6073
6074 // BEGIN STREAM PARSING
6075 stream->guarantee_more(8, CHECK); // magic, major, minor
6076 // Magic value
6077 const u4 magic = stream->get_u4_fast();
6078 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6079 "Incompatible magic value %u in class file %s",
6080 magic, CHECK);
6081
6082 // Version numbers
6083 _minor_version = stream->get_u2_fast();
6084 _major_version = stream->get_u2_fast();
6085
6086 // Check version numbers - we check this even with verifier off
6087 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
6088
6089 stream->guarantee_more(3, CHECK); // length, first cp tag
6090 u2 cp_size = stream->get_u2_fast();
6091
6092 guarantee_property(
6093 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6094 cp_size, CHECK);
6095
6096 _orig_cp_size = cp_size;
6097 if (is_hidden()) { // Add a slot for hidden class name.
6098 cp_size++;
6099 }
6100
6101 _cp = ConstantPool::allocate(_loader_data,
6102 cp_size,
6103 CHECK);
6104
6105 ConstantPool* const cp = _cp;
6106
6107 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6108
6109 assert(cp_size == (const u2)cp->length(), "invariant");
6110
6111 // ACCESS FLAGS
6112 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6113
6114 jint recognized_modifiers = JVM_RECOGNIZED_CLASS_MODIFIERS;
6115 // JVM_ACC_MODULE is defined in JDK-9 and later.
6116 if (_major_version >= JAVA_9_VERSION) {
6117 recognized_modifiers |= JVM_ACC_MODULE;
6118 }
6119 // JVM_ACC_INLINE is defined for class file version 55 and later
6120 if (supports_inline_types()) {
6121 recognized_modifiers |= JVM_ACC_INLINE;
6122 }
6123
6124 // Access flags
6125 jint flags = stream->get_u2_fast() & recognized_modifiers;
6126
6127 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6128 // Set abstract bit for old class files for backward compatibility
6129 flags |= JVM_ACC_ABSTRACT;
6130 }
6131
6132 verify_legal_class_modifiers(flags, CHECK);
6133
6134 short bad_constant = class_bad_constant_seen();
6135 if (bad_constant != 0) {
6136 // Do not throw CFE until after the access_flags are checked because if
6137 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6138 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
6139 return;
6140 }
6141
6142 _access_flags.set_flags(flags);
6143
6144 // This class and superclass
6145 _this_class_index = stream->get_u2_fast();
6146 check_property(
6147 valid_cp_range(_this_class_index, cp_size) &&
6148 cp->tag_at(_this_class_index).is_unresolved_klass(),
6149 "Invalid this class index %u in constant pool in class file %s",
6150 _this_class_index, CHECK);
6151
6152 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6153 assert(class_name_in_cp != NULL, "class_name can't be null");
6154
6155 // Don't need to check whether this class name is legal or not.
6156 // It has been checked when constant pool is parsed.
6157 // However, make sure it is not an array type.
6158 if (_need_verify) {
6159 guarantee_property(class_name_in_cp->char_at(0) != JVM_SIGNATURE_ARRAY,
6160 "Bad class name in class file %s",
6161 CHECK);
6162 }
6163
6164 #ifdef ASSERT
6165 // Basic sanity checks
6166 if (_is_hidden) {
6167 assert(_class_name != vmSymbols::unknown_class_name(), "hidden classes should have a special name");
6168 }
6169 #endif
6170
6171 // Update the _class_name as needed depending on whether this is a named, un-named, or hidden class.
6172
6173 if (_is_hidden) {
6174 assert(_class_name != NULL, "Unexpected null _class_name");
6175 #ifdef ASSERT
6176 if (_need_verify) {
6177 verify_legal_class_name(_class_name, CHECK);
6178 }
6179 #endif
6180
6181 } else {
6182 // Check if name in class file matches given name
6183 if (_class_name != class_name_in_cp) {
6184 if (_class_name != vmSymbols::unknown_class_name()) {
6185 ResourceMark rm(THREAD);
6186 Exceptions::fthrow(THREAD_AND_LOCATION,
6187 vmSymbols::java_lang_NoClassDefFoundError(),
6188 "%s (wrong name: %s)",
6189 class_name_in_cp->as_C_string(),
6190 _class_name->as_C_string()
6191 );
6192 return;
6193 } else {
6194 // The class name was not known by the caller so we set it from
6195 // the value in the CP.
6196 update_class_name(class_name_in_cp);
6197 }
6198 // else nothing to do: the expected class name matches what is in the CP
6199 }
6200 }
6201
6202 // Verification prevents us from creating names with dots in them, this
6203 // asserts that that's the case.
6204 assert(is_internal_format(_class_name), "external class name format used internally");
6205
6206 if (!is_internal()) {
6207 LogTarget(Debug, class, preorder) lt;
6208 if (lt.is_enabled()){
6209 ResourceMark rm(THREAD);
6210 LogStream ls(lt);
6211 ls.print("%s", _class_name->as_klass_external_name());
6212 if (stream->source() != NULL) {
6213 ls.print(" source: %s", stream->source());
6214 }
6215 ls.cr();
6216 }
6217 }
6218
6219 // SUPERKLASS
6220 _super_class_index = stream->get_u2_fast();
6221 _super_klass = parse_super_class(cp,
6222 _super_class_index,
6223 _need_verify,
6224 CHECK);
6225
6226 // Interfaces
6227 _itfs_len = stream->get_u2_fast();
6228 parse_interfaces(stream,
6229 _itfs_len,
6230 cp,
6231 &_has_nonstatic_concrete_methods,
6232 &_is_declared_atomic,
6233 CHECK);
6234
6235 assert(_temp_local_interfaces != NULL, "invariant");
6236
6237 // Fields (offsets are filled in later)
6238 _fac = new FieldAllocationCount();
6239 parse_fields(stream,
6240 is_interface(),
6241 is_inline_type(),
6242 _fac,
6243 cp,
6244 cp_size,
6245 &_java_fields_count,
6246 CHECK);
6247
6248 assert(_fields != NULL, "invariant");
6249
6250 // Methods
6251 AccessFlags promoted_flags;
6252 parse_methods(stream,
6253 is_interface(),
6254 is_inline_type(),
6255 &promoted_flags,
6256 &_has_final_method,
6257 &_declares_nonstatic_concrete_methods,
6258 CHECK);
6259
6260 assert(_methods != NULL, "invariant");
6261
6262 // promote flags from parse_methods() to the klass' flags
6263 _access_flags.add_promoted_flags(promoted_flags.as_int());
6264
6265 if (_declares_nonstatic_concrete_methods) {
6266 _has_nonstatic_concrete_methods = true;
6267 }
6268
6269 // Additional attributes/annotations
6270 _parsed_annotations = new ClassAnnotationCollector();
6271 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6272
6273 assert(_inner_classes != NULL, "invariant");
6274
6275 // Finalize the Annotations metadata object,
6276 // now that all annotation arrays have been created.
6277 create_combined_annotations(CHECK);
6278
6279 // Make sure this is the end of class file stream
6280 guarantee_property(stream->at_eos(),
6281 "Extra bytes at the end of class file %s",
6282 CHECK);
6283
6284 // all bytes in stream read and parsed
6285 }
6286
6287 void ClassFileParser::mangle_hidden_class_name(InstanceKlass* const ik) {
6288 ResourceMark rm;
6289 // Construct hidden name from _class_name, "+", and &ik. Note that we can't
6290 // use a '/' because that confuses finding the class's package. Also, can't
6291 // use an illegal char such as ';' because that causes serialization issues
6292 // and issues with hidden classes that create their own hidden classes.
6293 char addr_buf[20];
6294 if (DumpSharedSpaces) {
6295 // We want stable names for the archived hidden classes (only for static
6296 // archive for now). Spaces under default_SharedBaseAddress() will be
6297 // occupied by the archive at run time, so we know that no dynamically
6298 // loaded InstanceKlass will be placed under there.
6299 static volatile size_t counter = 0;
6300 Atomic::cmpxchg(&counter, (size_t)0, Arguments::default_SharedBaseAddress()); // initialize it
6301 size_t new_id = Atomic::add(&counter, (size_t)1);
6302 jio_snprintf(addr_buf, 20, SIZE_FORMAT_HEX, new_id);
6303 } else {
6304 jio_snprintf(addr_buf, 20, INTPTR_FORMAT, p2i(ik));
6305 }
6306 size_t new_name_len = _class_name->utf8_length() + 2 + strlen(addr_buf);
6307 char* new_name = NEW_RESOURCE_ARRAY(char, new_name_len);
6308 jio_snprintf(new_name, new_name_len, "%s+%s",
6309 _class_name->as_C_string(), addr_buf);
6310 update_class_name(SymbolTable::new_symbol(new_name));
6311
6312 // Add a Utf8 entry containing the hidden name.
6313 assert(_class_name != NULL, "Unexpected null _class_name");
6314 int hidden_index = _orig_cp_size; // this is an extra slot we added
6315 _cp->symbol_at_put(hidden_index, _class_name);
6316
6317 // Update this_class_index's slot in the constant pool with the new Utf8 entry.
6318 // We have to update the resolved_klass_index and the name_index together
6319 // so extract the existing resolved_klass_index first.
6320 CPKlassSlot cp_klass_slot = _cp->klass_slot_at(_this_class_index);
6321 int resolved_klass_index = cp_klass_slot.resolved_klass_index();
6322 _cp->unresolved_klass_at_put(_this_class_index, hidden_index, resolved_klass_index);
6323 assert(_cp->klass_slot_at(_this_class_index).name_index() == _orig_cp_size,
6324 "Bad name_index");
6325 }
6326
6327 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6328 ConstantPool* cp,
6329 TRAPS) {
6330 assert(stream != NULL, "invariant");
6331 assert(stream->at_eos(), "invariant");
6332 assert(cp != NULL, "invariant");
6333 assert(_loader_data != NULL, "invariant");
6334
6335 if (_class_name == vmSymbols::java_lang_Object()) {
6336 check_property(_temp_local_interfaces->length() == 0,
6337 "java.lang.Object cannot implement an interface in class file %s",
6338 CHECK);
6339 }
6340 // We check super class after class file is parsed and format is checked
6341 if (_super_class_index > 0 && NULL == _super_klass) {
6342 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6343 if (is_interface()) {
6344 // Before attempting to resolve the superclass, check for class format
6345 // errors not checked yet.
6346 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6347 "Interfaces must have java.lang.Object as superclass in class file %s",
6348 CHECK);
6349 }
6350 Handle loader(THREAD, _loader_data->class_loader());
6351 _super_klass = (const InstanceKlass*)
6352 SystemDictionary::resolve_super_or_fail(_class_name,
6353 super_class_name,
6354 loader,
6355 _protection_domain,
6356 true,
6357 CHECK);
6358 }
6359
6360 if (_super_klass != NULL) {
6361 if (_super_klass->has_nonstatic_concrete_methods()) {
6362 _has_nonstatic_concrete_methods = true;
6363 }
6364 if (_super_klass->is_declared_atomic()) {
6365 _is_declared_atomic = true;
6366 }
6367
6368 if (_super_klass->is_interface()) {
6369 classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
6370 return;
6371 }
6372
6373 // For an inline class, only java/lang/Object or special abstract classes
6374 // are acceptable super classes.
6375 if (is_inline_type()) {
6376 const InstanceKlass* super_ik = _super_klass;
6377 if (super_ik->invalid_inline_super()) {
6378 classfile_icce_error("inline class %s has an invalid super class %s", _super_klass, THREAD);
6379 return;
6380 }
6381 }
6382 }
6383
6384 if (_class_name == vmSymbols::java_lang_NonTearable() && _loader_data->class_loader() == NULL) {
6385 // This is the original source of this condition.
6386 // It propagates by inheritance, as if testing "instanceof NonTearable".
6387 _is_declared_atomic = true;
6388 } else if (*ForceNonTearable != '\0') {
6389 // Allow a command line switch to force the same atomicity property:
6390 const char* class_name_str = _class_name->as_C_string();
6391 if (StringUtils::class_list_match(ForceNonTearable, class_name_str)) {
6392 _is_declared_atomic = true;
6393 }
6394 }
6395
6396 // Set ik->invalid_inline_super field to TRUE if already marked as invalid,
6397 // if super is marked invalid, or if is_invalid_super_for_inline_type()
6398 // returns true
6399 if (invalid_inline_super() ||
6400 (_super_klass != NULL && _super_klass->invalid_inline_super()) ||
6401 is_invalid_super_for_inline_type()) {
6402 set_invalid_inline_super();
6403 }
6404
6405 if (EnableValhalla && !is_inline_type() && invalid_inline_super() && (_super_klass == NULL || !_super_klass->invalid_inline_super())
6406 && !_implements_identityObject && class_name() != vmSymbols::java_lang_IdentityObject()) {
6407 _temp_local_interfaces->append(vmClasses::IdentityObject_klass());
6408 _has_injected_identityObject = true;
6409 }
6410 // Check if declared as PrimitiveObject...else add if needed
6411 if (_implements_primitiveObject) {
6412 if (!is_inline_type() && invalid_inline_super()) {
6413 classfile_icce_error("class %s can not implement %s, neither valid inline classes or valid supertype",
6414 vmClasses::PrimitiveObject_klass(), THREAD);
6415 return;
6416 }
6417 } else if (is_inline_type()) {
6418 _temp_local_interfaces->append(vmClasses::PrimitiveObject_klass());
6419 _has_injected_primitiveObject = true;
6420 }
6421
6422 int itfs_len = _temp_local_interfaces->length();
6423 if (itfs_len == 0) {
6424 _local_interfaces = Universe::the_empty_instance_klass_array();
6425 } else if (itfs_len == 1 && _temp_local_interfaces->at(0) == vmClasses::IdentityObject_klass()) {
6426 _local_interfaces = Universe::the_single_IdentityObject_klass_array();
6427 } else if (itfs_len == 1 && _temp_local_interfaces->at(0) == vmClasses::PrimitiveObject_klass()) {
6428 _local_interfaces = Universe::the_single_PrimitiveObject_klass_array();
6429 } else {
6430 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
6431 for (int i = 0; i < itfs_len; i++) {
6432 _local_interfaces->at_put(i, _temp_local_interfaces->at(i));
6433 }
6434 }
6435 _temp_local_interfaces = NULL;
6436 assert(_local_interfaces != NULL, "invariant");
6437
6438 // Compute the transitive list of all unique interfaces implemented by this class
6439 _transitive_interfaces =
6440 compute_transitive_interfaces(_super_klass,
6441 _local_interfaces,
6442 _loader_data,
6443 CHECK);
6444
6445 assert(_transitive_interfaces != NULL, "invariant");
6446
6447 // sort methods
6448 _method_ordering = sort_methods(_methods);
6449
6450 _all_mirandas = new GrowableArray<Method*>(20);
6451
6452 Handle loader(THREAD, _loader_data->class_loader());
6453 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6454 &_num_miranda_methods,
6455 _all_mirandas,
6456 _super_klass,
6457 _methods,
6458 _access_flags,
6459 _major_version,
6460 loader,
6461 _class_name,
6462 _local_interfaces);
6463
6464 // Size of Java itable (in words)
6465 _itable_size = is_interface() ? 0 :
6466 klassItable::compute_itable_size(_transitive_interfaces);
6467
6468 assert(_fac != NULL, "invariant");
6469 assert(_parsed_annotations != NULL, "invariant");
6470
6471
6472 if (EnableValhalla) {
6473 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
6474 if (Signature::basic_type(fs.signature()) == T_INLINE_TYPE && !fs.access_flags().is_static()) {
6475 // Pre-load inline class
6476 Klass* klass = SystemDictionary::resolve_inline_type_field_or_fail(&fs,
6477 Handle(THREAD, _loader_data->class_loader()),
6478 _protection_domain, true, CHECK);
6479 assert(klass != NULL, "Sanity check");
6480 if (!klass->access_flags().is_inline_type()) {
6481 assert(klass->is_instance_klass(), "Sanity check");
6482 ResourceMark rm(THREAD);
6483 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
6484 err_msg("Class %s expects class %s to be an inline type, but it is not",
6485 _class_name->as_C_string(),
6486 InstanceKlass::cast(klass)->external_name()));
6487 }
6488 }
6489 }
6490 }
6491
6492 _field_info = new FieldLayoutInfo();
6493 FieldLayoutBuilder lb(class_name(), super_klass(), _cp, _fields,
6494 _parsed_annotations->is_contended(), is_inline_type(),
6495 loader_data(), _protection_domain, _field_info);
6496 lb.build_layout(CHECK);
6497 if (is_inline_type()) {
6498 _alignment = lb.get_alignment();
6499 _first_field_offset = lb.get_first_field_offset();
6500 _exact_size_in_bytes = lb.get_exact_size_in_byte();
6501 }
6502 _has_inline_type_fields = _field_info->_has_inline_fields;
6503
6504 // Compute reference type
6505 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6506 }
6507
6508 void ClassFileParser::set_klass(InstanceKlass* klass) {
6509
6510 #ifdef ASSERT
6511 if (klass != NULL) {
6512 assert(NULL == _klass, "leaking?");
6513 }
6514 #endif
6515
6516 _klass = klass;
6517 }
6518
6519 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6520
6521 #ifdef ASSERT
6522 if (klass != NULL) {
6523 assert(NULL == _klass_to_deallocate, "leaking?");
6524 }
6525 #endif
6526
6527 _klass_to_deallocate = klass;
6528 }
6529
6530 // Caller responsible for ResourceMark
6531 // clone stream with rewound position
6532 const ClassFileStream* ClassFileParser::clone_stream() const {
6533 assert(_stream != NULL, "invariant");
6534
6535 return _stream->clone();
6536 }
6537
6538 // ----------------------------------------------------------------------------
6539 // debugging
6540
6541 #ifdef ASSERT
6542
6543 // return true if class_name contains no '.' (internal format is '/')
6544 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6545 if (class_name != NULL) {
6546 ResourceMark rm;
6547 char* name = class_name->as_C_string();
6548 return strchr(name, JVM_SIGNATURE_DOT) == NULL;
6549 } else {
6550 return true;
6551 }
6552 }
6553
6554 #endif