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 #include "precompiled.hpp"
25 #include "jvm.h"
26 #include "classfile/classFileParser.hpp"
27 #include "classfile/classFileStream.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/classLoadInfo.hpp"
31 #include "classfile/defaultMethods.hpp"
32 #include "classfile/fieldLayoutBuilder.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/moduleEntry.hpp"
35 #include "classfile/packageEntry.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/verificationType.hpp"
39 #include "classfile/verifier.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "logging/log.hpp"
43 #include "logging/logStream.hpp"
44 #include "memory/allocation.hpp"
45 #include "memory/metadataFactory.hpp"
46 #include "memory/oopFactory.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "memory/universe.hpp"
49 #include "oops/annotations.hpp"
50 #include "oops/constantPool.inline.hpp"
51 #include "oops/fieldStreams.inline.hpp"
52 #include "oops/instanceKlass.inline.hpp"
53 #include "oops/instanceMirrorKlass.hpp"
54 #include "oops/klass.inline.hpp"
55 #include "oops/klassVtable.hpp"
56 #include "oops/metadata.hpp"
57 #include "oops/method.inline.hpp"
58 #include "oops/oop.inline.hpp"
59 #include "oops/recordComponent.hpp"
60 #include "oops/symbol.hpp"
61 #include "prims/jvmtiExport.hpp"
62 #include "prims/jvmtiThreadState.hpp"
63 #include "runtime/arguments.hpp"
64 #include "runtime/fieldDescriptor.inline.hpp"
65 #include "runtime/handles.inline.hpp"
66 #include "runtime/javaCalls.hpp"
67 #include "runtime/os.hpp"
68 #include "runtime/perfData.hpp"
69 #include "runtime/reflection.hpp"
70 #include "runtime/safepointVerifiers.hpp"
71 #include "runtime/signature.hpp"
72 #include "runtime/timer.hpp"
73 #include "services/classLoadingService.hpp"
74 #include "services/threadService.hpp"
75 #include "utilities/align.hpp"
76 #include "utilities/bitMap.inline.hpp"
77 #include "utilities/copy.hpp"
78 #include "utilities/formatBuffer.hpp"
79 #include "utilities/exceptions.hpp"
80 #include "utilities/globalDefinitions.hpp"
81 #include "utilities/growableArray.hpp"
82 #include "utilities/macros.hpp"
83 #include "utilities/ostream.hpp"
84 #include "utilities/resourceHash.hpp"
85 #include "utilities/utf8.hpp"
86
87 #if INCLUDE_CDS
88 #include "classfile/systemDictionaryShared.hpp"
89 #endif
90 #if INCLUDE_JFR
91 #include "jfr/support/jfrTraceIdExtension.hpp"
92 #endif
93
94 // We generally try to create the oops directly when parsing, rather than
95 // allocating temporary data structures and copying the bytes twice. A
96 // temporary area is only needed when parsing utf8 entries in the constant
97 // pool and when parsing line number tables.
98
99 // We add assert in debug mode when class format is not checked.
100
101 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
102 #define JAVA_MIN_SUPPORTED_VERSION 45
103 #define JAVA_PREVIEW_MINOR_VERSION 65535
104
105 // Used for two backward compatibility reasons:
106 // - to check for new additions to the class file format in JDK1.5
107 // - to check for bug fixes in the format checker in JDK1.5
108 #define JAVA_1_5_VERSION 49
109
110 // Used for backward compatibility reasons:
111 // - to check for javac bug fixes that happened after 1.5
112 // - also used as the max version when running in jdk6
113 #define JAVA_6_VERSION 50
114
115 // Used for backward compatibility reasons:
116 // - to disallow argument and require ACC_STATIC for <clinit> methods
117 #define JAVA_7_VERSION 51
118
119 // Extension method support.
120 #define JAVA_8_VERSION 52
121
122 #define JAVA_9_VERSION 53
123
124 #define JAVA_10_VERSION 54
125
126 #define JAVA_11_VERSION 55
127
128 #define JAVA_12_VERSION 56
129
130 #define JAVA_13_VERSION 57
131
132 #define JAVA_14_VERSION 58
133
134 #define JAVA_15_VERSION 59
135
136 #define JAVA_16_VERSION 60
137
138 #define JAVA_17_VERSION 61
139
140 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
141 assert((bad_constant == JVM_CONSTANT_Module ||
142 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
143 "Unexpected bad constant pool entry");
144 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
145 }
146
147 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
148 ConstantPool* cp,
149 const int length,
150 TRAPS) {
151 assert(stream != NULL, "invariant");
152 assert(cp != NULL, "invariant");
153
154 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
155 // this function (_current can be allocated in a register, with scalar
156 // replacement of aggregates). The _current pointer is copied back to
157 // stream() when this function returns. DON'T call another method within
158 // this method that uses stream().
159 const ClassFileStream cfs1 = *stream;
160 const ClassFileStream* const cfs = &cfs1;
161
162 assert(cfs->allocated_on_stack(), "should be local");
163 debug_only(const u1* const old_current = stream->current();)
164
165 // Used for batching symbol allocations.
166 const char* names[SymbolTable::symbol_alloc_batch_size];
167 int lengths[SymbolTable::symbol_alloc_batch_size];
168 int indices[SymbolTable::symbol_alloc_batch_size];
169 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
170 int names_count = 0;
171
172 // parsing Index 0 is unused
173 for (int index = 1; index < length; index++) {
174 // Each of the following case guarantees one more byte in the stream
175 // for the following tag or the access_flags following constant pool,
176 // so we don't need bounds-check for reading tag.
177 const u1 tag = cfs->get_u1_fast();
178 switch (tag) {
179 case JVM_CONSTANT_Class : {
180 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
181 const u2 name_index = cfs->get_u2_fast();
182 cp->klass_index_at_put(index, name_index);
183 break;
184 }
185 case JVM_CONSTANT_Fieldref: {
186 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
187 const u2 class_index = cfs->get_u2_fast();
188 const u2 name_and_type_index = cfs->get_u2_fast();
189 cp->field_at_put(index, class_index, name_and_type_index);
190 break;
191 }
192 case JVM_CONSTANT_Methodref: {
193 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
194 const u2 class_index = cfs->get_u2_fast();
195 const u2 name_and_type_index = cfs->get_u2_fast();
196 cp->method_at_put(index, class_index, name_and_type_index);
197 break;
198 }
199 case JVM_CONSTANT_InterfaceMethodref: {
200 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
201 const u2 class_index = cfs->get_u2_fast();
202 const u2 name_and_type_index = cfs->get_u2_fast();
203 cp->interface_method_at_put(index, class_index, name_and_type_index);
204 break;
205 }
206 case JVM_CONSTANT_String : {
207 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
208 const u2 string_index = cfs->get_u2_fast();
209 cp->string_index_at_put(index, string_index);
210 break;
211 }
212 case JVM_CONSTANT_MethodHandle :
213 case JVM_CONSTANT_MethodType: {
214 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
215 classfile_parse_error(
216 "Class file version does not support constant tag %u in class file %s",
217 tag, THREAD);
218 return;
219 }
220 if (tag == JVM_CONSTANT_MethodHandle) {
221 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
222 const u1 ref_kind = cfs->get_u1_fast();
223 const u2 method_index = cfs->get_u2_fast();
224 cp->method_handle_index_at_put(index, ref_kind, method_index);
225 }
226 else if (tag == JVM_CONSTANT_MethodType) {
227 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
228 const u2 signature_index = cfs->get_u2_fast();
229 cp->method_type_index_at_put(index, signature_index);
230 }
231 else {
232 ShouldNotReachHere();
233 }
234 break;
235 }
236 case JVM_CONSTANT_Dynamic : {
237 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
238 classfile_parse_error(
239 "Class file version does not support constant tag %u in class file %s",
240 tag, THREAD);
241 return;
242 }
243 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
244 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
245 const u2 name_and_type_index = cfs->get_u2_fast();
246 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
247 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
248 }
249 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
250 break;
251 }
252 case JVM_CONSTANT_InvokeDynamic : {
253 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
254 classfile_parse_error(
255 "Class file version does not support constant tag %u in class file %s",
256 tag, THREAD);
257 return;
258 }
259 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
260 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
261 const u2 name_and_type_index = cfs->get_u2_fast();
262 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
263 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
264 }
265 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
266 break;
267 }
268 case JVM_CONSTANT_Integer: {
269 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
270 const u4 bytes = cfs->get_u4_fast();
271 cp->int_at_put(index, (jint)bytes);
272 break;
273 }
274 case JVM_CONSTANT_Float: {
275 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
276 const u4 bytes = cfs->get_u4_fast();
277 cp->float_at_put(index, *(jfloat*)&bytes);
278 break;
279 }
280 case JVM_CONSTANT_Long: {
281 // A mangled type might cause you to overrun allocated memory
282 guarantee_property(index + 1 < length,
283 "Invalid constant pool entry %u in class file %s",
284 index,
285 CHECK);
286 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
287 const u8 bytes = cfs->get_u8_fast();
288 cp->long_at_put(index, bytes);
289 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
290 break;
291 }
292 case JVM_CONSTANT_Double: {
293 // A mangled type might cause you to overrun allocated memory
294 guarantee_property(index+1 < length,
295 "Invalid constant pool entry %u in class file %s",
296 index,
297 CHECK);
298 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
299 const u8 bytes = cfs->get_u8_fast();
300 cp->double_at_put(index, *(jdouble*)&bytes);
301 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
302 break;
303 }
304 case JVM_CONSTANT_NameAndType: {
305 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
306 const u2 name_index = cfs->get_u2_fast();
307 const u2 signature_index = cfs->get_u2_fast();
308 cp->name_and_type_at_put(index, name_index, signature_index);
309 break;
310 }
311 case JVM_CONSTANT_Utf8 : {
312 cfs->guarantee_more(2, CHECK); // utf8_length
313 u2 utf8_length = cfs->get_u2_fast();
314 const u1* utf8_buffer = cfs->current();
315 assert(utf8_buffer != NULL, "null utf8 buffer");
316 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
317 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
318 cfs->skip_u1_fast(utf8_length);
319
320 // Before storing the symbol, make sure it's legal
321 if (_need_verify) {
322 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
323 }
324
325 unsigned int hash;
326 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
327 utf8_length,
328 hash);
329 if (result == NULL) {
330 names[names_count] = (const char*)utf8_buffer;
331 lengths[names_count] = utf8_length;
332 indices[names_count] = index;
333 hashValues[names_count++] = hash;
334 if (names_count == SymbolTable::symbol_alloc_batch_size) {
335 SymbolTable::new_symbols(_loader_data,
336 constantPoolHandle(THREAD, cp),
337 names_count,
338 names,
339 lengths,
340 indices,
341 hashValues);
342 names_count = 0;
343 }
344 } else {
345 cp->symbol_at_put(index, result);
346 }
347 break;
348 }
349 case JVM_CONSTANT_Module:
350 case JVM_CONSTANT_Package: {
351 // Record that an error occurred in these two cases but keep parsing so
352 // that ACC_Module can be checked for in the access_flags. Need to
353 // throw NoClassDefFoundError in that case.
354 if (_major_version >= JAVA_9_VERSION) {
355 cfs->guarantee_more(3, CHECK);
356 cfs->get_u2_fast();
357 set_class_bad_constant_seen(tag);
358 break;
359 }
360 }
361 default: {
362 classfile_parse_error("Unknown constant tag %u in class file %s",
363 tag,
364 THREAD);
365 return;
366 }
367 } // end of switch(tag)
368 } // end of for
369
370 // Allocate the remaining symbols
371 if (names_count > 0) {
372 SymbolTable::new_symbols(_loader_data,
373 constantPoolHandle(THREAD, cp),
374 names_count,
375 names,
376 lengths,
377 indices,
378 hashValues);
379 }
380
381 // Copy _current pointer of local copy back to stream.
382 assert(stream->current() == old_current, "non-exclusive use of stream");
383 stream->set_current(cfs1.current());
384
385 }
386
387 static inline bool valid_cp_range(int index, int length) {
388 return (index > 0 && index < length);
389 }
390
391 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
392 assert(cp != NULL, "invariant");
393 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
394 return cp->symbol_at(index);
395 }
396 return NULL;
397 }
398
399 #ifdef ASSERT
400 PRAGMA_DIAG_PUSH
401 PRAGMA_FORMAT_NONLITERAL_IGNORED
402 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
403 ResourceMark rm(THREAD);
404 fatal(msg, _class_name->as_C_string());
405 }
406
407 void ClassFileParser::report_assert_property_failure(const char* msg,
408 int index,
409 TRAPS) const {
410 ResourceMark rm(THREAD);
411 fatal(msg, index, _class_name->as_C_string());
412 }
413 PRAGMA_DIAG_POP
414 #endif
415
416 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
417 ConstantPool* const cp,
418 const int length,
419 TRAPS) {
420 assert(cp != NULL, "invariant");
421 assert(stream != NULL, "invariant");
422
423 // parsing constant pool entries
424 parse_constant_pool_entries(stream, cp, length, CHECK);
425 if (class_bad_constant_seen() != 0) {
426 // a bad CP entry has been detected previously so stop parsing and just return.
427 return;
428 }
429
430 int index = 1; // declared outside of loops for portability
431 int num_klasses = 0;
432
433 // first verification pass - validate cross references
434 // and fixup class and string constants
435 for (index = 1; index < length; index++) { // Index 0 is unused
436 const jbyte tag = cp->tag_at(index).value();
437 switch (tag) {
438 case JVM_CONSTANT_Class: {
439 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
440 break;
441 }
442 case JVM_CONSTANT_Fieldref:
443 // fall through
444 case JVM_CONSTANT_Methodref:
445 // fall through
446 case JVM_CONSTANT_InterfaceMethodref: {
447 if (!_need_verify) break;
448 const int klass_ref_index = cp->klass_ref_index_at(index);
449 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
450 check_property(valid_klass_reference_at(klass_ref_index),
451 "Invalid constant pool index %u in class file %s",
452 klass_ref_index, CHECK);
453 check_property(valid_cp_range(name_and_type_ref_index, length) &&
454 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
455 "Invalid constant pool index %u in class file %s",
456 name_and_type_ref_index, CHECK);
457 break;
458 }
459 case JVM_CONSTANT_String: {
460 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
461 break;
462 }
463 case JVM_CONSTANT_Integer:
464 break;
465 case JVM_CONSTANT_Float:
466 break;
467 case JVM_CONSTANT_Long:
468 case JVM_CONSTANT_Double: {
469 index++;
470 check_property(
471 (index < length && cp->tag_at(index).is_invalid()),
472 "Improper constant pool long/double index %u in class file %s",
473 index, CHECK);
474 break;
475 }
476 case JVM_CONSTANT_NameAndType: {
477 if (!_need_verify) break;
478 const int name_ref_index = cp->name_ref_index_at(index);
479 const int signature_ref_index = cp->signature_ref_index_at(index);
480 check_property(valid_symbol_at(name_ref_index),
481 "Invalid constant pool index %u in class file %s",
482 name_ref_index, CHECK);
483 check_property(valid_symbol_at(signature_ref_index),
484 "Invalid constant pool index %u in class file %s",
485 signature_ref_index, CHECK);
486 break;
487 }
488 case JVM_CONSTANT_Utf8:
489 break;
490 case JVM_CONSTANT_UnresolvedClass: // fall-through
491 case JVM_CONSTANT_UnresolvedClassInError: {
492 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
493 break;
494 }
495 case JVM_CONSTANT_ClassIndex: {
496 const int class_index = cp->klass_index_at(index);
497 check_property(valid_symbol_at(class_index),
498 "Invalid constant pool index %u in class file %s",
499 class_index, CHECK);
500 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
501 break;
502 }
503 case JVM_CONSTANT_StringIndex: {
504 const int string_index = cp->string_index_at(index);
505 check_property(valid_symbol_at(string_index),
506 "Invalid constant pool index %u in class file %s",
507 string_index, CHECK);
508 Symbol* const sym = cp->symbol_at(string_index);
509 cp->unresolved_string_at_put(index, sym);
510 break;
511 }
512 case JVM_CONSTANT_MethodHandle: {
513 const int ref_index = cp->method_handle_index_at(index);
514 check_property(valid_cp_range(ref_index, length),
515 "Invalid constant pool index %u in class file %s",
516 ref_index, CHECK);
517 const constantTag tag = cp->tag_at(ref_index);
518 const int ref_kind = cp->method_handle_ref_kind_at(index);
519
520 switch (ref_kind) {
521 case JVM_REF_getField:
522 case JVM_REF_getStatic:
523 case JVM_REF_putField:
524 case JVM_REF_putStatic: {
525 check_property(
526 tag.is_field(),
527 "Invalid constant pool index %u in class file %s (not a field)",
528 ref_index, CHECK);
529 break;
530 }
531 case JVM_REF_invokeVirtual:
532 case JVM_REF_newInvokeSpecial: {
533 check_property(
534 tag.is_method(),
535 "Invalid constant pool index %u in class file %s (not a method)",
536 ref_index, CHECK);
537 break;
538 }
539 case JVM_REF_invokeStatic:
540 case JVM_REF_invokeSpecial: {
541 check_property(
542 tag.is_method() ||
543 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
544 "Invalid constant pool index %u in class file %s (not a method)",
545 ref_index, CHECK);
546 break;
547 }
548 case JVM_REF_invokeInterface: {
549 check_property(
550 tag.is_interface_method(),
551 "Invalid constant pool index %u in class file %s (not an interface method)",
552 ref_index, CHECK);
553 break;
554 }
555 default: {
556 classfile_parse_error(
557 "Bad method handle kind at constant pool index %u in class file %s",
558 index, THREAD);
559 return;
560 }
561 } // switch(refkind)
562 // Keep the ref_index unchanged. It will be indirected at link-time.
563 break;
564 } // case MethodHandle
565 case JVM_CONSTANT_MethodType: {
566 const int ref_index = cp->method_type_index_at(index);
567 check_property(valid_symbol_at(ref_index),
568 "Invalid constant pool index %u in class file %s",
569 ref_index, CHECK);
570 break;
571 }
572 case JVM_CONSTANT_Dynamic: {
573 const int name_and_type_ref_index =
574 cp->bootstrap_name_and_type_ref_index_at(index);
575
576 check_property(valid_cp_range(name_and_type_ref_index, length) &&
577 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
578 "Invalid constant pool index %u in class file %s",
579 name_and_type_ref_index, CHECK);
580 // bootstrap specifier index must be checked later,
581 // when BootstrapMethods attr is available
582
583 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
584 cp->set_has_dynamic_constant();
585 break;
586 }
587 case JVM_CONSTANT_InvokeDynamic: {
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 break;
598 }
599 default: {
600 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
601 ShouldNotReachHere();
602 break;
603 }
604 } // switch(tag)
605 } // end of for
606
607 cp->allocate_resolved_klasses(_loader_data, num_klasses, CHECK);
608
609 if (!_need_verify) {
610 return;
611 }
612
613 // second verification pass - checks the strings are of the right format.
614 // but not yet to the other entries
615 for (index = 1; index < length; index++) {
616 const jbyte tag = cp->tag_at(index).value();
617 switch (tag) {
618 case JVM_CONSTANT_UnresolvedClass: {
619 const Symbol* const class_name = cp->klass_name_at(index);
620 // check the name
621 verify_legal_class_name(class_name, CHECK);
622 break;
623 }
624 case JVM_CONSTANT_NameAndType: {
625 if (_need_verify) {
626 const int sig_index = cp->signature_ref_index_at(index);
627 const int name_index = cp->name_ref_index_at(index);
628 const Symbol* const name = cp->symbol_at(name_index);
629 const Symbol* const sig = cp->symbol_at(sig_index);
630 guarantee_property(sig->utf8_length() != 0,
631 "Illegal zero length constant pool entry at %d in class %s",
632 sig_index, CHECK);
633 guarantee_property(name->utf8_length() != 0,
634 "Illegal zero length constant pool entry at %d in class %s",
635 name_index, CHECK);
636
637 if (Signature::is_method(sig)) {
638 // Format check method name and signature
639 verify_legal_method_name(name, CHECK);
640 verify_legal_method_signature(name, sig, CHECK);
641 } else {
642 // Format check field name and signature
643 verify_legal_field_name(name, CHECK);
644 verify_legal_field_signature(name, sig, CHECK);
645 }
646 }
647 break;
648 }
649 case JVM_CONSTANT_Dynamic: {
650 const int name_and_type_ref_index =
651 cp->name_and_type_ref_index_at(index);
652 // already verified to be utf8
653 const int name_ref_index =
654 cp->name_ref_index_at(name_and_type_ref_index);
655 // already verified to be utf8
656 const int signature_ref_index =
657 cp->signature_ref_index_at(name_and_type_ref_index);
658 const Symbol* const name = cp->symbol_at(name_ref_index);
659 const Symbol* const signature = cp->symbol_at(signature_ref_index);
660 if (_need_verify) {
661 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
662 // Need only to be sure signature is the right type.
663 if (Signature::is_method(signature)) {
664 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
665 }
666 }
667 break;
668 }
669 case JVM_CONSTANT_InvokeDynamic:
670 case JVM_CONSTANT_Fieldref:
671 case JVM_CONSTANT_Methodref:
672 case JVM_CONSTANT_InterfaceMethodref: {
673 const int name_and_type_ref_index =
674 cp->name_and_type_ref_index_at(index);
675 // already verified to be utf8
676 const int name_ref_index =
677 cp->name_ref_index_at(name_and_type_ref_index);
678 // already verified to be utf8
679 const int signature_ref_index =
680 cp->signature_ref_index_at(name_and_type_ref_index);
681 const Symbol* const name = cp->symbol_at(name_ref_index);
682 const Symbol* const signature = cp->symbol_at(signature_ref_index);
683 if (tag == JVM_CONSTANT_Fieldref) {
684 if (_need_verify) {
685 // Field name and signature are verified above, when iterating NameAndType_info.
686 // Need only to be sure signature is non-zero length and the right type.
687 if (Signature::is_method(signature)) {
688 throwIllegalSignature("Field", name, signature, CHECK);
689 }
690 }
691 } else {
692 if (_need_verify) {
693 // Method name and signature are verified above, when iterating NameAndType_info.
694 // Need only to be sure signature is non-zero length and the right type.
695 if (!Signature::is_method(signature)) {
696 throwIllegalSignature("Method", name, signature, CHECK);
697 }
698 }
699 // 4509014: If a class method name begins with '<', it must be "<init>"
700 const unsigned int name_len = name->utf8_length();
701 if (tag == JVM_CONSTANT_Methodref &&
702 name_len != 0 &&
703 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
704 name != vmSymbols::object_initializer_name()) {
705 classfile_parse_error(
706 "Bad method name at constant pool index %u in class file %s",
707 name_ref_index, THREAD);
708 return;
709 }
710 }
711 break;
712 }
713 case JVM_CONSTANT_MethodHandle: {
714 const int ref_index = cp->method_handle_index_at(index);
715 const int ref_kind = cp->method_handle_ref_kind_at(index);
716 switch (ref_kind) {
717 case JVM_REF_invokeVirtual:
718 case JVM_REF_invokeStatic:
719 case JVM_REF_invokeSpecial:
720 case JVM_REF_newInvokeSpecial: {
721 const int name_and_type_ref_index =
722 cp->name_and_type_ref_index_at(ref_index);
723 const int name_ref_index =
724 cp->name_ref_index_at(name_and_type_ref_index);
725 const Symbol* const name = cp->symbol_at(name_ref_index);
726 if (ref_kind == JVM_REF_newInvokeSpecial) {
727 if (name != vmSymbols::object_initializer_name()) {
728 classfile_parse_error(
729 "Bad constructor name at constant pool index %u in class file %s",
730 name_ref_index, THREAD);
731 return;
732 }
733 } else {
734 if (name == vmSymbols::object_initializer_name()) {
735 classfile_parse_error(
736 "Bad method name at constant pool index %u in class file %s",
737 name_ref_index, THREAD);
738 return;
739 }
740 }
741 break;
742 }
743 // Other ref_kinds are already fully checked in previous pass.
744 } // switch(ref_kind)
745 break;
746 }
747 case JVM_CONSTANT_MethodType: {
748 const Symbol* const no_name = vmSymbols::type_name(); // place holder
749 const Symbol* const signature = cp->method_type_signature_at(index);
750 verify_legal_method_signature(no_name, signature, CHECK);
751 break;
752 }
753 case JVM_CONSTANT_Utf8: {
754 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
755 }
756 } // switch(tag)
757 } // end of for
758 }
759
760 class NameSigHash: public ResourceObj {
761 public:
762 const Symbol* _name; // name
763 const Symbol* _sig; // signature
764 NameSigHash* _next; // Next entry in hash table
765 };
766
767 static const int HASH_ROW_SIZE = 256;
768
769 static unsigned int hash(const Symbol* name, const Symbol* sig) {
770 unsigned int raw_hash = 0;
771 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
772 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
773
774 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
775 }
776
777
778 static void initialize_hashtable(NameSigHash** table) {
779 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
780 }
781 // Return false if the name/sig combination is found in table.
782 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
783 // The old format checker uses heap sort to find duplicates.
784 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
785 // of table since we don't expect Symbol*'s to move.
786 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
787 assert(name != NULL, "name in constant pool is NULL");
788
789 // First lookup for duplicates
790 int index = hash(name, sig);
791 NameSigHash* entry = table[index];
792 while (entry != NULL) {
793 if (entry->_name == name && entry->_sig == sig) {
794 return false;
795 }
796 entry = entry->_next;
797 }
798
799 // No duplicate is found, allocate a new entry and fill it.
800 entry = new NameSigHash();
801 entry->_name = name;
802 entry->_sig = sig;
803
804 // Insert into hash table
805 entry->_next = table[index];
806 table[index] = entry;
807
808 return true;
809 }
810
811 // Side-effects: populates the _local_interfaces field
812 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
813 const int itfs_len,
814 ConstantPool* const cp,
815 bool* const has_nonstatic_concrete_methods,
816 TRAPS) {
817 assert(stream != NULL, "invariant");
818 assert(cp != NULL, "invariant");
819 assert(has_nonstatic_concrete_methods != NULL, "invariant");
820
821 if (itfs_len == 0) {
822 _local_interfaces = Universe::the_empty_instance_klass_array();
823 } else {
824 assert(itfs_len > 0, "only called for len>0");
825 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
826
827 int index;
828 for (index = 0; index < itfs_len; index++) {
829 const u2 interface_index = stream->get_u2(CHECK);
830 Klass* interf;
831 check_property(
832 valid_klass_reference_at(interface_index),
833 "Interface name has bad constant pool index %u in class file %s",
834 interface_index, CHECK);
835 if (cp->tag_at(interface_index).is_klass()) {
836 interf = cp->resolved_klass_at(interface_index);
837 } else {
838 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
839
840 // Don't need to check legal name because it's checked when parsing constant pool.
841 // But need to make sure it's not an array type.
842 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
843 "Bad interface name in class file %s", CHECK);
844
845 // Call resolve_super so class circularity is checked
846 interf = SystemDictionary::resolve_super_or_fail(
847 _class_name,
848 unresolved_klass,
849 Handle(THREAD, _loader_data->class_loader()),
850 _protection_domain,
851 false,
852 CHECK);
853 }
854
855 if (!interf->is_interface()) {
856 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
857 err_msg("class %s can not implement %s, because it is not an interface (%s)",
858 _class_name->as_klass_external_name(),
859 interf->external_name(),
860 interf->class_in_module_of_loader()));
861 }
862
863 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
864 *has_nonstatic_concrete_methods = true;
865 }
866 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
867 }
868
869 if (!_need_verify || itfs_len <= 1) {
870 return;
871 }
872
873 // Check if there's any duplicates in interfaces
874 ResourceMark rm(THREAD);
875 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
876 NameSigHash*,
877 HASH_ROW_SIZE);
878 initialize_hashtable(interface_names);
879 bool dup = false;
880 const Symbol* name = NULL;
881 {
882 debug_only(NoSafepointVerifier nsv;)
883 for (index = 0; index < itfs_len; index++) {
884 const InstanceKlass* const k = _local_interfaces->at(index);
885 name = k->name();
886 // If no duplicates, add (name, NULL) in hashtable interface_names.
887 if (!put_after_lookup(name, NULL, interface_names)) {
888 dup = true;
889 break;
890 }
891 }
892 }
893 if (dup) {
894 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
895 name->as_C_string(), THREAD);
896 }
897 }
898 }
899
900 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
901 int constantvalue_index,
902 int signature_index,
903 TRAPS) const {
904 // Make sure the constant pool entry is of a type appropriate to this field
905 guarantee_property(
906 (constantvalue_index > 0 &&
907 constantvalue_index < cp->length()),
908 "Bad initial value index %u in ConstantValue attribute in class file %s",
909 constantvalue_index, CHECK);
910
911 const constantTag value_type = cp->tag_at(constantvalue_index);
912 switch(cp->basic_type_for_signature_at(signature_index)) {
913 case T_LONG: {
914 guarantee_property(value_type.is_long(),
915 "Inconsistent constant value type in class file %s",
916 CHECK);
917 break;
918 }
919 case T_FLOAT: {
920 guarantee_property(value_type.is_float(),
921 "Inconsistent constant value type in class file %s",
922 CHECK);
923 break;
924 }
925 case T_DOUBLE: {
926 guarantee_property(value_type.is_double(),
927 "Inconsistent constant value type in class file %s",
928 CHECK);
929 break;
930 }
931 case T_BYTE:
932 case T_CHAR:
933 case T_SHORT:
934 case T_BOOLEAN:
935 case T_INT: {
936 guarantee_property(value_type.is_int(),
937 "Inconsistent constant value type in class file %s",
938 CHECK);
939 break;
940 }
941 case T_OBJECT: {
942 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
943 && value_type.is_string()),
944 "Bad string initial value in class file %s",
945 CHECK);
946 break;
947 }
948 default: {
949 classfile_parse_error("Unable to set initial value %u in class file %s",
950 constantvalue_index,
951 THREAD);
952 }
953 }
954 }
955
956 class AnnotationCollector : public ResourceObj{
957 public:
958 enum Location { _in_field, _in_method, _in_class };
959 enum ID {
960 _unknown = 0,
961 _method_CallerSensitive,
962 _method_ForceInline,
963 _method_DontInline,
964 _method_InjectedProfile,
965 _method_LambdaForm_Compiled,
966 _method_Hidden,
967 _method_Scoped,
968 _method_IntrinsicCandidate,
969 _jdk_internal_vm_annotation_Contended,
970 _field_Stable,
971 _jdk_internal_vm_annotation_ReservedStackAccess,
972 _jdk_internal_ValueBased,
973 _annotation_LIMIT
974 };
975 const Location _location;
976 int _annotations_present;
977 u2 _contended_group;
978
979 AnnotationCollector(Location location)
980 : _location(location), _annotations_present(0), _contended_group(0)
981 {
982 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
983 }
984 // If this annotation name has an ID, report it (or _none).
985 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, bool can_access_vm_annotations);
986 // Set the annotation name:
987 void set_annotation(ID id) {
988 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
989 _annotations_present |= nth_bit((int)id);
990 }
991
992 void remove_annotation(ID id) {
993 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
994 _annotations_present &= ~nth_bit((int)id);
995 }
996
997 // Report if the annotation is present.
998 bool has_any_annotations() const { return _annotations_present != 0; }
999 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1000
1001 void set_contended_group(u2 group) { _contended_group = group; }
1002 u2 contended_group() const { return _contended_group; }
1003
1004 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1005
1006 void set_stable(bool stable) { set_annotation(_field_Stable); }
1007 bool is_stable() const { return has_annotation(_field_Stable); }
1008 };
1009
1010 // This class also doubles as a holder for metadata cleanup.
1011 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1012 private:
1013 ClassLoaderData* _loader_data;
1014 AnnotationArray* _field_annotations;
1015 AnnotationArray* _field_type_annotations;
1016 public:
1017 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1018 AnnotationCollector(_in_field),
1019 _loader_data(loader_data),
1020 _field_annotations(NULL),
1021 _field_type_annotations(NULL) {}
1022 ~FieldAnnotationCollector();
1023 void apply_to(FieldInfo* f);
1024 AnnotationArray* field_annotations() { return _field_annotations; }
1025 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1026
1027 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1028 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1029 };
1030
1031 class MethodAnnotationCollector : public AnnotationCollector{
1032 public:
1033 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1034 void apply_to(const methodHandle& m);
1035 };
1036
1037 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1038 public:
1039 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1040 void apply_to(InstanceKlass* ik);
1041 };
1042
1043
1044 static int skip_annotation_value(const u1*, int, int); // fwd decl
1045
1046 // Safely increment index by val if does not pass limit
1047 #define SAFE_ADD(index, limit, val) \
1048 if (index >= limit - val) return limit; \
1049 index += val;
1050
1051 // Skip an annotation. Return >=limit if there is any problem.
1052 static int skip_annotation(const u1* buffer, int limit, int index) {
1053 assert(buffer != NULL, "invariant");
1054 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1055 // value := switch (tag:u1) { ... }
1056 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1057 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1058 while (--nmem >= 0 && index < limit) {
1059 SAFE_ADD(index, limit, 2); // skip member
1060 index = skip_annotation_value(buffer, limit, index);
1061 }
1062 return index;
1063 }
1064
1065 // Skip an annotation value. Return >=limit if there is any problem.
1066 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1067 assert(buffer != NULL, "invariant");
1068
1069 // value := switch (tag:u1) {
1070 // case B, C, I, S, Z, D, F, J, c: con:u2;
1071 // case e: e_class:u2 e_name:u2;
1072 // case s: s_con:u2;
1073 // case [: do(nval:u2) {value};
1074 // case @: annotation;
1075 // case s: s_con:u2;
1076 // }
1077 SAFE_ADD(index, limit, 1); // read tag
1078 const u1 tag = buffer[index - 1];
1079 switch (tag) {
1080 case 'B':
1081 case 'C':
1082 case 'I':
1083 case 'S':
1084 case 'Z':
1085 case 'D':
1086 case 'F':
1087 case 'J':
1088 case 'c':
1089 case 's':
1090 SAFE_ADD(index, limit, 2); // skip con or s_con
1091 break;
1092 case 'e':
1093 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1094 break;
1095 case '[':
1096 {
1097 SAFE_ADD(index, limit, 2); // read nval
1098 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1099 while (--nval >= 0 && index < limit) {
1100 index = skip_annotation_value(buffer, limit, index);
1101 }
1102 }
1103 break;
1104 case '@':
1105 index = skip_annotation(buffer, limit, index);
1106 break;
1107 default:
1108 return limit; // bad tag byte
1109 }
1110 return index;
1111 }
1112
1113 // Sift through annotations, looking for those significant to the VM:
1114 static void parse_annotations(const ConstantPool* const cp,
1115 const u1* buffer, int limit,
1116 AnnotationCollector* coll,
1117 ClassLoaderData* loader_data,
1118 const bool can_access_vm_annotations) {
1119
1120 assert(cp != NULL, "invariant");
1121 assert(buffer != NULL, "invariant");
1122 assert(coll != NULL, "invariant");
1123 assert(loader_data != NULL, "invariant");
1124
1125 // annotations := do(nann:u2) {annotation}
1126 int index = 2; // read nann
1127 if (index >= limit) return;
1128 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1129 enum { // initial annotation layout
1130 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1131 count_off = 2, // u2 such as 1 (one value)
1132 member_off = 4, // utf8 such as 'value'
1133 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1134 e_tag_val = 'e',
1135 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1136 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1137 e_size = 11, // end of 'e' annotation
1138 c_tag_val = 'c', // payload is type
1139 c_con_off = 7, // utf8 payload, such as 'I'
1140 c_size = 9, // end of 'c' annotation
1141 s_tag_val = 's', // payload is String
1142 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1143 s_size = 9,
1144 min_size = 6 // smallest possible size (zero members)
1145 };
1146 // Cannot add min_size to index in case of overflow MAX_INT
1147 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1148 int index0 = index;
1149 index = skip_annotation(buffer, limit, index);
1150 const u1* const abase = buffer + index0;
1151 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1152 const int count = Bytes::get_Java_u2((address)abase + count_off);
1153 const Symbol* const aname = check_symbol_at(cp, atype);
1154 if (aname == NULL) break; // invalid annotation name
1155 const Symbol* member = NULL;
1156 if (count >= 1) {
1157 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1158 member = check_symbol_at(cp, member_index);
1159 if (member == NULL) break; // invalid member name
1160 }
1161
1162 // Here is where parsing particular annotations will take place.
1163 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname, can_access_vm_annotations);
1164 if (AnnotationCollector::_unknown == id) continue;
1165 coll->set_annotation(id);
1166
1167 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1168 // @Contended can optionally specify the contention group.
1169 //
1170 // Contended group defines the equivalence class over the fields:
1171 // the fields within the same contended group are not treated distinct.
1172 // The only exception is default group, which does not incur the
1173 // equivalence. Naturally, contention group for classes is meaningless.
1174 //
1175 // While the contention group is specified as String, annotation
1176 // values are already interned, and we might as well use the constant
1177 // pool index as the group tag.
1178 //
1179 u2 group_index = 0; // default contended group
1180 if (count == 1
1181 && s_size == (index - index0) // match size
1182 && s_tag_val == *(abase + tag_off)
1183 && member == vmSymbols::value_name()) {
1184 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1185 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1186 group_index = 0; // default contended group
1187 }
1188 }
1189 coll->set_contended_group(group_index);
1190 }
1191 }
1192 }
1193
1194
1195 // Parse attributes for a field.
1196 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1197 u2 attributes_count,
1198 bool is_static, u2 signature_index,
1199 u2* const constantvalue_index_addr,
1200 bool* const is_synthetic_addr,
1201 u2* const generic_signature_index_addr,
1202 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1203 TRAPS) {
1204 assert(cfs != NULL, "invariant");
1205 assert(constantvalue_index_addr != NULL, "invariant");
1206 assert(is_synthetic_addr != NULL, "invariant");
1207 assert(generic_signature_index_addr != NULL, "invariant");
1208 assert(parsed_annotations != NULL, "invariant");
1209 assert(attributes_count > 0, "attributes_count should be greater than 0");
1210
1211 u2 constantvalue_index = 0;
1212 u2 generic_signature_index = 0;
1213 bool is_synthetic = false;
1214 const u1* runtime_visible_annotations = NULL;
1215 int runtime_visible_annotations_length = 0;
1216 const u1* runtime_invisible_annotations = NULL;
1217 int runtime_invisible_annotations_length = 0;
1218 const u1* runtime_visible_type_annotations = NULL;
1219 int runtime_visible_type_annotations_length = 0;
1220 const u1* runtime_invisible_type_annotations = NULL;
1221 int runtime_invisible_type_annotations_length = 0;
1222 bool runtime_invisible_annotations_exists = false;
1223 bool runtime_invisible_type_annotations_exists = false;
1224 const ConstantPool* const cp = _cp;
1225
1226 while (attributes_count--) {
1227 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1228 const u2 attribute_name_index = cfs->get_u2_fast();
1229 const u4 attribute_length = cfs->get_u4_fast();
1230 check_property(valid_symbol_at(attribute_name_index),
1231 "Invalid field attribute index %u in class file %s",
1232 attribute_name_index,
1233 CHECK);
1234
1235 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1236 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1237 // ignore if non-static
1238 if (constantvalue_index != 0) {
1239 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", THREAD);
1240 return;
1241 }
1242 check_property(
1243 attribute_length == 2,
1244 "Invalid ConstantValue field attribute length %u in class file %s",
1245 attribute_length, CHECK);
1246
1247 constantvalue_index = cfs->get_u2(CHECK);
1248 if (_need_verify) {
1249 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1250 }
1251 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1252 if (attribute_length != 0) {
1253 classfile_parse_error(
1254 "Invalid Synthetic field attribute length %u in class file %s",
1255 attribute_length, THREAD);
1256 return;
1257 }
1258 is_synthetic = true;
1259 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1260 if (attribute_length != 0) {
1261 classfile_parse_error(
1262 "Invalid Deprecated field attribute length %u in class file %s",
1263 attribute_length, THREAD);
1264 return;
1265 }
1266 } else if (_major_version >= JAVA_1_5_VERSION) {
1267 if (attribute_name == vmSymbols::tag_signature()) {
1268 if (generic_signature_index != 0) {
1269 classfile_parse_error(
1270 "Multiple Signature attributes for field in class file %s", THREAD);
1271 return;
1272 }
1273 if (attribute_length != 2) {
1274 classfile_parse_error(
1275 "Wrong size %u for field's Signature attribute in class file %s",
1276 attribute_length, THREAD);
1277 return;
1278 }
1279 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1280 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1281 if (runtime_visible_annotations != NULL) {
1282 classfile_parse_error(
1283 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", THREAD);
1284 return;
1285 }
1286 runtime_visible_annotations_length = attribute_length;
1287 runtime_visible_annotations = cfs->current();
1288 assert(runtime_visible_annotations != NULL, "null visible annotations");
1289 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1290 parse_annotations(cp,
1291 runtime_visible_annotations,
1292 runtime_visible_annotations_length,
1293 parsed_annotations,
1294 _loader_data,
1295 _can_access_vm_annotations);
1296 cfs->skip_u1_fast(runtime_visible_annotations_length);
1297 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1298 if (runtime_invisible_annotations_exists) {
1299 classfile_parse_error(
1300 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", THREAD);
1301 return;
1302 }
1303 runtime_invisible_annotations_exists = true;
1304 if (PreserveAllAnnotations) {
1305 runtime_invisible_annotations_length = attribute_length;
1306 runtime_invisible_annotations = cfs->current();
1307 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1308 }
1309 cfs->skip_u1(attribute_length, CHECK);
1310 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1311 if (runtime_visible_type_annotations != NULL) {
1312 classfile_parse_error(
1313 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", THREAD);
1314 return;
1315 }
1316 runtime_visible_type_annotations_length = attribute_length;
1317 runtime_visible_type_annotations = cfs->current();
1318 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1319 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1320 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1321 if (runtime_invisible_type_annotations_exists) {
1322 classfile_parse_error(
1323 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", THREAD);
1324 return;
1325 } else {
1326 runtime_invisible_type_annotations_exists = true;
1327 }
1328 if (PreserveAllAnnotations) {
1329 runtime_invisible_type_annotations_length = attribute_length;
1330 runtime_invisible_type_annotations = cfs->current();
1331 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1332 }
1333 cfs->skip_u1(attribute_length, CHECK);
1334 } else {
1335 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1336 }
1337 } else {
1338 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1339 }
1340 }
1341
1342 *constantvalue_index_addr = constantvalue_index;
1343 *is_synthetic_addr = is_synthetic;
1344 *generic_signature_index_addr = generic_signature_index;
1345 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1346 runtime_visible_annotations_length,
1347 runtime_invisible_annotations,
1348 runtime_invisible_annotations_length,
1349 CHECK);
1350 parsed_annotations->set_field_annotations(a);
1351 a = assemble_annotations(runtime_visible_type_annotations,
1352 runtime_visible_type_annotations_length,
1353 runtime_invisible_type_annotations,
1354 runtime_invisible_type_annotations_length,
1355 CHECK);
1356 parsed_annotations->set_field_type_annotations(a);
1357 return;
1358 }
1359
1360
1361 // Field allocation types. Used for computing field offsets.
1362
1363 enum FieldAllocationType {
1364 STATIC_OOP, // Oops
1365 STATIC_BYTE, // Boolean, Byte, char
1366 STATIC_SHORT, // shorts
1367 STATIC_WORD, // ints
1368 STATIC_DOUBLE, // aligned long or double
1369 NONSTATIC_OOP,
1370 NONSTATIC_BYTE,
1371 NONSTATIC_SHORT,
1372 NONSTATIC_WORD,
1373 NONSTATIC_DOUBLE,
1374 MAX_FIELD_ALLOCATION_TYPE,
1375 BAD_ALLOCATION_TYPE = -1
1376 };
1377
1378 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1379 BAD_ALLOCATION_TYPE, // 0
1380 BAD_ALLOCATION_TYPE, // 1
1381 BAD_ALLOCATION_TYPE, // 2
1382 BAD_ALLOCATION_TYPE, // 3
1383 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1384 NONSTATIC_SHORT, // T_CHAR = 5,
1385 NONSTATIC_WORD, // T_FLOAT = 6,
1386 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1387 NONSTATIC_BYTE, // T_BYTE = 8,
1388 NONSTATIC_SHORT, // T_SHORT = 9,
1389 NONSTATIC_WORD, // T_INT = 10,
1390 NONSTATIC_DOUBLE, // T_LONG = 11,
1391 NONSTATIC_OOP, // T_OBJECT = 12,
1392 NONSTATIC_OOP, // T_ARRAY = 13,
1393 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1394 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1395 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1396 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1397 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1398 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1399 BAD_ALLOCATION_TYPE, // 0
1400 BAD_ALLOCATION_TYPE, // 1
1401 BAD_ALLOCATION_TYPE, // 2
1402 BAD_ALLOCATION_TYPE, // 3
1403 STATIC_BYTE , // T_BOOLEAN = 4,
1404 STATIC_SHORT, // T_CHAR = 5,
1405 STATIC_WORD, // T_FLOAT = 6,
1406 STATIC_DOUBLE, // T_DOUBLE = 7,
1407 STATIC_BYTE, // T_BYTE = 8,
1408 STATIC_SHORT, // T_SHORT = 9,
1409 STATIC_WORD, // T_INT = 10,
1410 STATIC_DOUBLE, // T_LONG = 11,
1411 STATIC_OOP, // T_OBJECT = 12,
1412 STATIC_OOP, // T_ARRAY = 13,
1413 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1414 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1415 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1416 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1417 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1418 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1419 };
1420
1421 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1422 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1423 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1424 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1425 return result;
1426 }
1427
1428 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1429 public:
1430 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1431
1432 FieldAllocationCount() {
1433 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1434 count[i] = 0;
1435 }
1436 }
1437
1438 void update(bool is_static, BasicType type) {
1439 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1440 if (atype != BAD_ALLOCATION_TYPE) {
1441 // Make sure there is no overflow with injected fields.
1442 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1443 count[atype]++;
1444 }
1445 }
1446 };
1447
1448 // Side-effects: populates the _fields, _fields_annotations,
1449 // _fields_type_annotations fields
1450 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1451 bool is_interface,
1452 FieldAllocationCount* const fac,
1453 ConstantPool* cp,
1454 const int cp_size,
1455 u2* const java_fields_count_ptr,
1456 TRAPS) {
1457
1458 assert(cfs != NULL, "invariant");
1459 assert(fac != NULL, "invariant");
1460 assert(cp != NULL, "invariant");
1461 assert(java_fields_count_ptr != NULL, "invariant");
1462
1463 assert(NULL == _fields, "invariant");
1464 assert(NULL == _fields_annotations, "invariant");
1465 assert(NULL == _fields_type_annotations, "invariant");
1466
1467 cfs->guarantee_more(2, CHECK); // length
1468 const u2 length = cfs->get_u2_fast();
1469 *java_fields_count_ptr = length;
1470
1471 int num_injected = 0;
1472 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1473 &num_injected);
1474 const int total_fields = length + num_injected;
1475
1476 // The field array starts with tuples of shorts
1477 // [access, name index, sig index, initial value index, byte offset].
1478 // A generic signature slot only exists for field with generic
1479 // signature attribute. And the access flag is set with
1480 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1481 // signature slots are at the end of the field array and after all
1482 // other fields data.
1483 //
1484 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1485 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1486 // ...
1487 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1488 // [generic signature index]
1489 // [generic signature index]
1490 // ...
1491 //
1492 // Allocate a temporary resource array for field data. For each field,
1493 // a slot is reserved in the temporary array for the generic signature
1494 // index. After parsing all fields, the data are copied to a permanent
1495 // array and any unused slots will be discarded.
1496 ResourceMark rm(THREAD);
1497 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1498 u2,
1499 total_fields * (FieldInfo::field_slots + 1));
1500
1501 // The generic signature slots start after all other fields' data.
1502 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1503 int num_generic_signature = 0;
1504 for (int n = 0; n < length; n++) {
1505 // access_flags, name_index, descriptor_index, attributes_count
1506 cfs->guarantee_more(8, CHECK);
1507
1508 AccessFlags access_flags;
1509 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1510 verify_legal_field_modifiers(flags, is_interface, CHECK);
1511 access_flags.set_flags(flags);
1512
1513 const u2 name_index = cfs->get_u2_fast();
1514 check_property(valid_symbol_at(name_index),
1515 "Invalid constant pool index %u for field name in class file %s",
1516 name_index, CHECK);
1517 const Symbol* const name = cp->symbol_at(name_index);
1518 verify_legal_field_name(name, CHECK);
1519
1520 const u2 signature_index = cfs->get_u2_fast();
1521 check_property(valid_symbol_at(signature_index),
1522 "Invalid constant pool index %u for field signature in class file %s",
1523 signature_index, CHECK);
1524 const Symbol* const sig = cp->symbol_at(signature_index);
1525 verify_legal_field_signature(name, sig, CHECK);
1526
1527 u2 constantvalue_index = 0;
1528 bool is_synthetic = false;
1529 u2 generic_signature_index = 0;
1530 const bool is_static = access_flags.is_static();
1531 FieldAnnotationCollector parsed_annotations(_loader_data);
1532
1533 const u2 attributes_count = cfs->get_u2_fast();
1534 if (attributes_count > 0) {
1535 parse_field_attributes(cfs,
1536 attributes_count,
1537 is_static,
1538 signature_index,
1539 &constantvalue_index,
1540 &is_synthetic,
1541 &generic_signature_index,
1542 &parsed_annotations,
1543 CHECK);
1544
1545 if (parsed_annotations.field_annotations() != NULL) {
1546 if (_fields_annotations == NULL) {
1547 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1548 _loader_data, length, NULL,
1549 CHECK);
1550 }
1551 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1552 parsed_annotations.set_field_annotations(NULL);
1553 }
1554 if (parsed_annotations.field_type_annotations() != NULL) {
1555 if (_fields_type_annotations == NULL) {
1556 _fields_type_annotations =
1557 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1558 length,
1559 NULL,
1560 CHECK);
1561 }
1562 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1563 parsed_annotations.set_field_type_annotations(NULL);
1564 }
1565
1566 if (is_synthetic) {
1567 access_flags.set_is_synthetic();
1568 }
1569 if (generic_signature_index != 0) {
1570 access_flags.set_field_has_generic_signature();
1571 fa[generic_signature_slot] = generic_signature_index;
1572 generic_signature_slot ++;
1573 num_generic_signature ++;
1574 }
1575 }
1576
1577 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1578 field->initialize(access_flags.as_short(),
1579 name_index,
1580 signature_index,
1581 constantvalue_index);
1582 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1583
1584 // Update FieldAllocationCount for this kind of field
1585 fac->update(is_static, type);
1586
1587 // After field is initialized with type, we can augment it with aux info
1588 if (parsed_annotations.has_any_annotations()) {
1589 parsed_annotations.apply_to(field);
1590 if (field->is_contended()) {
1591 _has_contended_fields = true;
1592 }
1593 }
1594 }
1595
1596 int index = length;
1597 if (num_injected != 0) {
1598 for (int n = 0; n < num_injected; n++) {
1599 // Check for duplicates
1600 if (injected[n].may_be_java) {
1601 const Symbol* const name = injected[n].name();
1602 const Symbol* const signature = injected[n].signature();
1603 bool duplicate = false;
1604 for (int i = 0; i < length; i++) {
1605 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1606 if (name == cp->symbol_at(f->name_index()) &&
1607 signature == cp->symbol_at(f->signature_index())) {
1608 // Symbol is desclared in Java so skip this one
1609 duplicate = true;
1610 break;
1611 }
1612 }
1613 if (duplicate) {
1614 // These will be removed from the field array at the end
1615 continue;
1616 }
1617 }
1618
1619 // Injected field
1620 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1621 field->initialize((u2)JVM_ACC_FIELD_INTERNAL,
1622 (u2)(injected[n].name_index),
1623 (u2)(injected[n].signature_index),
1624 0);
1625
1626 const BasicType type = Signature::basic_type(injected[n].signature());
1627
1628 // Update FieldAllocationCount for this kind of field
1629 fac->update(false, type);
1630 index++;
1631 }
1632 }
1633
1634 assert(NULL == _fields, "invariant");
1635
1636 _fields =
1637 MetadataFactory::new_array<u2>(_loader_data,
1638 index * FieldInfo::field_slots + num_generic_signature,
1639 CHECK);
1640 // Sometimes injected fields already exist in the Java source so
1641 // the fields array could be too long. In that case the
1642 // fields array is trimed. Also unused slots that were reserved
1643 // for generic signature indexes are discarded.
1644 {
1645 int i = 0;
1646 for (; i < index * FieldInfo::field_slots; i++) {
1647 _fields->at_put(i, fa[i]);
1648 }
1649 for (int j = total_fields * FieldInfo::field_slots;
1650 j < generic_signature_slot; j++) {
1651 _fields->at_put(i++, fa[j]);
1652 }
1653 assert(_fields->length() == i, "");
1654 }
1655
1656 if (_need_verify && length > 1) {
1657 // Check duplicated fields
1658 ResourceMark rm(THREAD);
1659 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1660 THREAD, NameSigHash*, HASH_ROW_SIZE);
1661 initialize_hashtable(names_and_sigs);
1662 bool dup = false;
1663 const Symbol* name = NULL;
1664 const Symbol* sig = NULL;
1665 {
1666 debug_only(NoSafepointVerifier nsv;)
1667 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1668 name = fs.name();
1669 sig = fs.signature();
1670 // If no duplicates, add name/signature in hashtable names_and_sigs.
1671 if (!put_after_lookup(name, sig, names_and_sigs)) {
1672 dup = true;
1673 break;
1674 }
1675 }
1676 }
1677 if (dup) {
1678 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1679 name->as_C_string(), sig->as_klass_external_name(), THREAD);
1680 }
1681 }
1682 }
1683
1684
1685 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1686 u4 code_length,
1687 u4 exception_table_length,
1688 TRAPS) {
1689 assert(cfs != NULL, "invariant");
1690
1691 const unsafe_u2* const exception_table_start = cfs->current();
1692 assert(exception_table_start != NULL, "null exception table");
1693
1694 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1695 // end_pc,
1696 // handler_pc,
1697 // catch_type_index
1698
1699 // Will check legal target after parsing code array in verifier.
1700 if (_need_verify) {
1701 for (unsigned int i = 0; i < exception_table_length; i++) {
1702 const u2 start_pc = cfs->get_u2_fast();
1703 const u2 end_pc = cfs->get_u2_fast();
1704 const u2 handler_pc = cfs->get_u2_fast();
1705 const u2 catch_type_index = cfs->get_u2_fast();
1706 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1707 "Illegal exception table range in class file %s",
1708 CHECK_NULL);
1709 guarantee_property(handler_pc < code_length,
1710 "Illegal exception table handler in class file %s",
1711 CHECK_NULL);
1712 if (catch_type_index != 0) {
1713 guarantee_property(valid_klass_reference_at(catch_type_index),
1714 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1715 }
1716 }
1717 } else {
1718 cfs->skip_u2_fast(exception_table_length * 4);
1719 }
1720 return exception_table_start;
1721 }
1722
1723 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1724 u4 code_length,
1725 CompressedLineNumberWriteStream**const write_stream,
1726 TRAPS) {
1727
1728 const ClassFileStream* const cfs = _stream;
1729 unsigned int num_entries = cfs->get_u2(CHECK);
1730
1731 // Each entry is a u2 start_pc, and a u2 line_number
1732 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1733
1734 // Verify line number attribute and table length
1735 check_property(
1736 code_attribute_length == sizeof(u2) + length_in_bytes,
1737 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1738
1739 cfs->guarantee_more(length_in_bytes, CHECK);
1740
1741 if ((*write_stream) == NULL) {
1742 if (length_in_bytes > fixed_buffer_size) {
1743 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1744 } else {
1745 (*write_stream) = new CompressedLineNumberWriteStream(
1746 _linenumbertable_buffer, fixed_buffer_size);
1747 }
1748 }
1749
1750 while (num_entries-- > 0) {
1751 const u2 bci = cfs->get_u2_fast(); // start_pc
1752 const u2 line = cfs->get_u2_fast(); // line_number
1753 guarantee_property(bci < code_length,
1754 "Invalid pc in LineNumberTable in class file %s", CHECK);
1755 (*write_stream)->write_pair(bci, line);
1756 }
1757 }
1758
1759
1760 class LVT_Hash : public AllStatic {
1761 public:
1762
1763 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1764 /*
1765 * 3-tuple start_bci/length/slot has to be unique key,
1766 * so the following comparison seems to be redundant:
1767 * && elem->name_cp_index == entry->_elem->name_cp_index
1768 */
1769 return (e0.start_bci == e1.start_bci &&
1770 e0.length == e1.length &&
1771 e0.name_cp_index == e1.name_cp_index &&
1772 e0.slot == e1.slot);
1773 }
1774
1775 static unsigned int hash(LocalVariableTableElement const& e0) {
1776 unsigned int raw_hash = e0.start_bci;
1777
1778 raw_hash = e0.length + raw_hash * 37;
1779 raw_hash = e0.name_cp_index + raw_hash * 37;
1780 raw_hash = e0.slot + raw_hash * 37;
1781
1782 return raw_hash;
1783 }
1784 };
1785
1786
1787 // Class file LocalVariableTable elements.
1788 class Classfile_LVT_Element {
1789 public:
1790 u2 start_bci;
1791 u2 length;
1792 u2 name_cp_index;
1793 u2 descriptor_cp_index;
1794 u2 slot;
1795 };
1796
1797 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1798 LocalVariableTableElement* const lvt) {
1799 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1800 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1801 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1802 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1803 lvt->signature_cp_index = 0;
1804 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1805 }
1806
1807 // Function is used to parse both attributes:
1808 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1809 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1810 u4 code_length,
1811 u2 max_locals,
1812 u4 code_attribute_length,
1813 u2* const localvariable_table_length,
1814 bool isLVTT,
1815 TRAPS) {
1816 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1817 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1818 const unsigned int size =
1819 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1820
1821 const ConstantPool* const cp = _cp;
1822
1823 // Verify local variable table attribute has right length
1824 if (_need_verify) {
1825 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1826 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1827 }
1828
1829 const unsafe_u2* const localvariable_table_start = cfs->current();
1830 assert(localvariable_table_start != NULL, "null local variable table");
1831 if (!_need_verify) {
1832 cfs->skip_u2_fast(size);
1833 } else {
1834 cfs->guarantee_more(size * 2, CHECK_NULL);
1835 for(int i = 0; i < (*localvariable_table_length); i++) {
1836 const u2 start_pc = cfs->get_u2_fast();
1837 const u2 length = cfs->get_u2_fast();
1838 const u2 name_index = cfs->get_u2_fast();
1839 const u2 descriptor_index = cfs->get_u2_fast();
1840 const u2 index = cfs->get_u2_fast();
1841 // Assign to a u4 to avoid overflow
1842 const u4 end_pc = (u4)start_pc + (u4)length;
1843
1844 if (start_pc >= code_length) {
1845 classfile_parse_error(
1846 "Invalid start_pc %u in %s in class file %s",
1847 start_pc, tbl_name, THREAD);
1848 return NULL;
1849 }
1850 if (end_pc > code_length) {
1851 classfile_parse_error(
1852 "Invalid length %u in %s in class file %s",
1853 length, tbl_name, THREAD);
1854 return NULL;
1855 }
1856 const int cp_size = cp->length();
1857 guarantee_property(valid_symbol_at(name_index),
1858 "Name index %u in %s has bad constant type in class file %s",
1859 name_index, tbl_name, CHECK_NULL);
1860 guarantee_property(valid_symbol_at(descriptor_index),
1861 "Signature index %u in %s has bad constant type in class file %s",
1862 descriptor_index, tbl_name, CHECK_NULL);
1863
1864 const Symbol* const name = cp->symbol_at(name_index);
1865 const Symbol* const sig = cp->symbol_at(descriptor_index);
1866 verify_legal_field_name(name, CHECK_NULL);
1867 u2 extra_slot = 0;
1868 if (!isLVTT) {
1869 verify_legal_field_signature(name, sig, CHECK_NULL);
1870
1871 // 4894874: check special cases for double and long local variables
1872 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1873 sig == vmSymbols::type_signature(T_LONG)) {
1874 extra_slot = 1;
1875 }
1876 }
1877 guarantee_property((index + extra_slot) < max_locals,
1878 "Invalid index %u in %s in class file %s",
1879 index, tbl_name, CHECK_NULL);
1880 }
1881 }
1882 return localvariable_table_start;
1883 }
1884
1885 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1886 u4 code_attribute_length,
1887 bool need_verify,
1888 TRAPS) {
1889 assert(cfs != NULL, "invariant");
1890
1891 if (0 == code_attribute_length) {
1892 return NULL;
1893 }
1894
1895 const u1* const stackmap_table_start = cfs->current();
1896 assert(stackmap_table_start != NULL, "null stackmap table");
1897
1898 // check code_attribute_length first
1899 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1900
1901 if (!need_verify && !DumpSharedSpaces) {
1902 return NULL;
1903 }
1904 return stackmap_table_start;
1905 }
1906
1907 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1908 u2* const checked_exceptions_length,
1909 u4 method_attribute_length,
1910 TRAPS) {
1911 assert(cfs != NULL, "invariant");
1912 assert(checked_exceptions_length != NULL, "invariant");
1913
1914 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1915 *checked_exceptions_length = cfs->get_u2_fast();
1916 const unsigned int size =
1917 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1918 const unsafe_u2* const checked_exceptions_start = cfs->current();
1919 assert(checked_exceptions_start != NULL, "null checked exceptions");
1920 if (!_need_verify) {
1921 cfs->skip_u2_fast(size);
1922 } else {
1923 // Verify each value in the checked exception table
1924 u2 checked_exception;
1925 const u2 len = *checked_exceptions_length;
1926 cfs->guarantee_more(2 * len, CHECK_NULL);
1927 for (int i = 0; i < len; i++) {
1928 checked_exception = cfs->get_u2_fast();
1929 check_property(
1930 valid_klass_reference_at(checked_exception),
1931 "Exception name has bad type at constant pool %u in class file %s",
1932 checked_exception, CHECK_NULL);
1933 }
1934 }
1935 // check exceptions attribute length
1936 if (_need_verify) {
1937 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1938 sizeof(u2) * size),
1939 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1940 }
1941 return checked_exceptions_start;
1942 }
1943
1944 void ClassFileParser::throwIllegalSignature(const char* type,
1945 const Symbol* name,
1946 const Symbol* sig,
1947 TRAPS) const {
1948 assert(name != NULL, "invariant");
1949 assert(sig != NULL, "invariant");
1950
1951 ResourceMark rm(THREAD);
1952 Exceptions::fthrow(THREAD_AND_LOCATION,
1953 vmSymbols::java_lang_ClassFormatError(),
1954 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1955 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1956 }
1957
1958 AnnotationCollector::ID
1959 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1960 const Symbol* name,
1961 const bool can_access_vm_annotations) {
1962 const vmSymbolID sid = vmSymbols::find_sid(name);
1963 // Privileged code can use all annotations. Other code silently drops some.
1964 const bool privileged = loader_data->is_boot_class_loader_data() ||
1965 loader_data->is_platform_class_loader_data() ||
1966 can_access_vm_annotations;
1967 switch (sid) {
1968 case VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
1969 if (_location != _in_method) break; // only allow for methods
1970 if (!privileged) break; // only allow in privileged code
1971 return _method_CallerSensitive;
1972 }
1973 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1974 if (_location != _in_method) break; // only allow for methods
1975 if (!privileged) break; // only allow in privileged code
1976 return _method_ForceInline;
1977 }
1978 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
1979 if (_location != _in_method) break; // only allow for methods
1980 if (!privileged) break; // only allow in privileged code
1981 return _method_DontInline;
1982 }
1983 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1984 if (_location != _in_method) break; // only allow for methods
1985 if (!privileged) break; // only allow in privileged code
1986 return _method_InjectedProfile;
1987 }
1988 case VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
1989 if (_location != _in_method) break; // only allow for methods
1990 if (!privileged) break; // only allow in privileged code
1991 return _method_LambdaForm_Compiled;
1992 }
1993 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
1994 if (_location != _in_method) break; // only allow for methods
1995 if (!privileged) break; // only allow in privileged code
1996 return _method_Hidden;
1997 }
1998 case VM_SYMBOL_ENUM_NAME(jdk_internal_misc_Scoped_signature): {
1999 if (_location != _in_method) break; // only allow for methods
2000 if (!privileged) break; // only allow in privileged code
2001 return _method_Scoped;
2002 }
2003 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_IntrinsicCandidate_signature): {
2004 if (_location != _in_method) break; // only allow for methods
2005 if (!privileged) break; // only allow in privileged code
2006 return _method_IntrinsicCandidate;
2007 }
2008 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2009 if (_location != _in_field) break; // only allow for fields
2010 if (!privileged) break; // only allow in privileged code
2011 return _field_Stable;
2012 }
2013 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2014 if (_location != _in_field && _location != _in_class) {
2015 break; // only allow for fields and classes
2016 }
2017 if (!EnableContended || (RestrictContended && !privileged)) {
2018 break; // honor privileges
2019 }
2020 return _jdk_internal_vm_annotation_Contended;
2021 }
2022 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2023 if (_location != _in_method) break; // only allow for methods
2024 if (RestrictReservedStack && !privileged) break; // honor privileges
2025 return _jdk_internal_vm_annotation_ReservedStackAccess;
2026 }
2027 case VM_SYMBOL_ENUM_NAME(jdk_internal_ValueBased_signature): {
2028 if (_location != _in_class) break; // only allow for classes
2029 if (!privileged) break; // only allow in priviledged code
2030 return _jdk_internal_ValueBased;
2031 }
2032 default: {
2033 break;
2034 }
2035 }
2036 return AnnotationCollector::_unknown;
2037 }
2038
2039 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2040 if (is_contended())
2041 f->set_contended_group(contended_group());
2042 if (is_stable())
2043 f->set_stable(true);
2044 }
2045
2046 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2047 // If there's an error deallocate metadata for field annotations
2048 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2049 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2050 }
2051
2052 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2053 if (has_annotation(_method_CallerSensitive))
2054 m->set_caller_sensitive(true);
2055 if (has_annotation(_method_ForceInline))
2056 m->set_force_inline(true);
2057 if (has_annotation(_method_DontInline))
2058 m->set_dont_inline(true);
2059 if (has_annotation(_method_InjectedProfile))
2060 m->set_has_injected_profile(true);
2061 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2062 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2063 if (has_annotation(_method_Hidden))
2064 m->set_hidden(true);
2065 if (has_annotation(_method_Scoped))
2066 m->set_scoped(true);
2067 if (has_annotation(_method_IntrinsicCandidate) && !m->is_synthetic())
2068 m->set_intrinsic_candidate(true);
2069 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2070 m->set_has_reserved_stack_access(true);
2071 }
2072
2073 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2074 assert(ik != NULL, "invariant");
2075 if (has_annotation(_jdk_internal_vm_annotation_Contended)) {
2076 ik->set_is_contended(is_contended());
2077 }
2078 if (has_annotation(_jdk_internal_ValueBased)) {
2079 ik->set_has_value_based_class_annotation();
2080 if (DiagnoseSyncOnValueBasedClasses) {
2081 ik->set_is_value_based();
2082 ik->set_prototype_header(markWord::prototype());
2083 }
2084 }
2085 }
2086
2087 #define MAX_ARGS_SIZE 255
2088 #define MAX_CODE_SIZE 65535
2089 #define INITIAL_MAX_LVT_NUMBER 256
2090
2091 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2092 *
2093 * Rules for LVT's and LVTT's are:
2094 * - There can be any number of LVT's and LVTT's.
2095 * - If there are n LVT's, it is the same as if there was just
2096 * one LVT containing all the entries from the n LVT's.
2097 * - There may be no more than one LVT entry per local variable.
2098 * Two LVT entries are 'equal' if these fields are the same:
2099 * start_pc, length, name, slot
2100 * - There may be no more than one LVTT entry per each LVT entry.
2101 * Each LVTT entry has to match some LVT entry.
2102 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2103 */
2104 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2105 int lvt_cnt,
2106 u2* const localvariable_table_length,
2107 const unsafe_u2** const localvariable_table_start,
2108 int lvtt_cnt,
2109 u2* const localvariable_type_table_length,
2110 const unsafe_u2** const localvariable_type_table_start,
2111 TRAPS) {
2112
2113 ResourceMark rm(THREAD);
2114
2115 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2116 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2117
2118 LVT_HashTable* const table = new LVT_HashTable();
2119
2120 // To fill LocalVariableTable in
2121 const Classfile_LVT_Element* cf_lvt;
2122 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2123
2124 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2125 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2126 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2127 copy_lvt_element(&cf_lvt[idx], lvt);
2128 // If no duplicates, add LVT elem in hashtable.
2129 if (table->put(*lvt, lvt) == false
2130 && _need_verify
2131 && _major_version >= JAVA_1_5_VERSION) {
2132 classfile_parse_error("Duplicated LocalVariableTable attribute "
2133 "entry for '%s' in class file %s",
2134 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2135 THREAD);
2136 return;
2137 }
2138 }
2139 }
2140
2141 // To merge LocalVariableTable and LocalVariableTypeTable
2142 const Classfile_LVT_Element* cf_lvtt;
2143 LocalVariableTableElement lvtt_elem;
2144
2145 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2146 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2147 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2148 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2149 LocalVariableTableElement** entry = table->get(lvtt_elem);
2150 if (entry == NULL) {
2151 if (_need_verify) {
2152 classfile_parse_error("LVTT entry for '%s' in class file %s "
2153 "does not match any LVT entry",
2154 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2155 THREAD);
2156 return;
2157 }
2158 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2159 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2160 "entry for '%s' in class file %s",
2161 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2162 THREAD);
2163 return;
2164 } else {
2165 // to add generic signatures into LocalVariableTable
2166 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2167 }
2168 }
2169 }
2170 }
2171
2172
2173 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2174 const u1* runtime_visible_annotations,
2175 int runtime_visible_annotations_length,
2176 const u1* runtime_invisible_annotations,
2177 int runtime_invisible_annotations_length,
2178 const u1* runtime_visible_parameter_annotations,
2179 int runtime_visible_parameter_annotations_length,
2180 const u1* runtime_invisible_parameter_annotations,
2181 int runtime_invisible_parameter_annotations_length,
2182 const u1* runtime_visible_type_annotations,
2183 int runtime_visible_type_annotations_length,
2184 const u1* runtime_invisible_type_annotations,
2185 int runtime_invisible_type_annotations_length,
2186 const u1* annotation_default,
2187 int annotation_default_length,
2188 TRAPS) {
2189
2190 AnnotationArray* a;
2191
2192 if (runtime_visible_annotations_length +
2193 runtime_invisible_annotations_length > 0) {
2194 a = assemble_annotations(runtime_visible_annotations,
2195 runtime_visible_annotations_length,
2196 runtime_invisible_annotations,
2197 runtime_invisible_annotations_length,
2198 CHECK);
2199 cm->set_method_annotations(a);
2200 }
2201
2202 if (runtime_visible_parameter_annotations_length +
2203 runtime_invisible_parameter_annotations_length > 0) {
2204 a = assemble_annotations(runtime_visible_parameter_annotations,
2205 runtime_visible_parameter_annotations_length,
2206 runtime_invisible_parameter_annotations,
2207 runtime_invisible_parameter_annotations_length,
2208 CHECK);
2209 cm->set_parameter_annotations(a);
2210 }
2211
2212 if (annotation_default_length > 0) {
2213 a = assemble_annotations(annotation_default,
2214 annotation_default_length,
2215 NULL,
2216 0,
2217 CHECK);
2218 cm->set_default_annotations(a);
2219 }
2220
2221 if (runtime_visible_type_annotations_length +
2222 runtime_invisible_type_annotations_length > 0) {
2223 a = assemble_annotations(runtime_visible_type_annotations,
2224 runtime_visible_type_annotations_length,
2225 runtime_invisible_type_annotations,
2226 runtime_invisible_type_annotations_length,
2227 CHECK);
2228 cm->set_type_annotations(a);
2229 }
2230 }
2231
2232
2233 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2234 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2235 // Method* to save footprint, so we only know the size of the resulting Method* when the
2236 // entire method attribute is parsed.
2237 //
2238 // The promoted_flags parameter is used to pass relevant access_flags
2239 // from the method back up to the containing klass. These flag values
2240 // are added to klass's access_flags.
2241
2242 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2243 bool is_interface,
2244 const ConstantPool* cp,
2245 AccessFlags* const promoted_flags,
2246 TRAPS) {
2247 assert(cfs != NULL, "invariant");
2248 assert(cp != NULL, "invariant");
2249 assert(promoted_flags != NULL, "invariant");
2250
2251 ResourceMark rm(THREAD);
2252 // Parse fixed parts:
2253 // access_flags, name_index, descriptor_index, attributes_count
2254 cfs->guarantee_more(8, CHECK_NULL);
2255
2256 int flags = cfs->get_u2_fast();
2257 const u2 name_index = cfs->get_u2_fast();
2258 const int cp_size = cp->length();
2259 check_property(
2260 valid_symbol_at(name_index),
2261 "Illegal constant pool index %u for method name in class file %s",
2262 name_index, CHECK_NULL);
2263 const Symbol* const name = cp->symbol_at(name_index);
2264 verify_legal_method_name(name, CHECK_NULL);
2265
2266 const u2 signature_index = cfs->get_u2_fast();
2267 guarantee_property(
2268 valid_symbol_at(signature_index),
2269 "Illegal constant pool index %u for method signature in class file %s",
2270 signature_index, CHECK_NULL);
2271 const Symbol* const signature = cp->symbol_at(signature_index);
2272
2273 if (name == vmSymbols::class_initializer_name()) {
2274 // We ignore the other access flags for a valid class initializer.
2275 // (JVM Spec 2nd ed., chapter 4.6)
2276 if (_major_version < 51) { // backward compatibility
2277 flags = JVM_ACC_STATIC;
2278 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2279 flags &= JVM_ACC_STATIC | (_major_version <= JAVA_16_VERSION ? JVM_ACC_STRICT : 0);
2280 } else {
2281 classfile_parse_error("Method <clinit> is not static in class file %s", THREAD);
2282 return NULL;
2283 }
2284 } else {
2285 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2286 }
2287
2288 if (name == vmSymbols::object_initializer_name() && is_interface) {
2289 classfile_parse_error("Interface cannot have a method named <init>, class file %s", THREAD);
2290 return NULL;
2291 }
2292
2293 int args_size = -1; // only used when _need_verify is true
2294 if (_need_verify) {
2295 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2296 verify_legal_method_signature(name, signature, CHECK_NULL);
2297 if (args_size > MAX_ARGS_SIZE) {
2298 classfile_parse_error("Too many arguments in method signature in class file %s", THREAD);
2299 return NULL;
2300 }
2301 }
2302
2303 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2304
2305 // Default values for code and exceptions attribute elements
2306 u2 max_stack = 0;
2307 u2 max_locals = 0;
2308 u4 code_length = 0;
2309 const u1* code_start = 0;
2310 u2 exception_table_length = 0;
2311 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2312 Array<int>* exception_handlers = Universe::the_empty_int_array();
2313 u2 checked_exceptions_length = 0;
2314 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2315 CompressedLineNumberWriteStream* linenumber_table = NULL;
2316 int linenumber_table_length = 0;
2317 int total_lvt_length = 0;
2318 u2 lvt_cnt = 0;
2319 u2 lvtt_cnt = 0;
2320 bool lvt_allocated = false;
2321 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2322 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2323 u2* localvariable_table_length = NULL;
2324 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2325 u2* localvariable_type_table_length = NULL;
2326 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2327 int method_parameters_length = -1;
2328 const u1* method_parameters_data = NULL;
2329 bool method_parameters_seen = false;
2330 bool parsed_code_attribute = false;
2331 bool parsed_checked_exceptions_attribute = false;
2332 bool parsed_stackmap_attribute = false;
2333 // stackmap attribute - JDK1.5
2334 const u1* stackmap_data = NULL;
2335 int stackmap_data_length = 0;
2336 u2 generic_signature_index = 0;
2337 MethodAnnotationCollector parsed_annotations;
2338 const u1* runtime_visible_annotations = NULL;
2339 int runtime_visible_annotations_length = 0;
2340 const u1* runtime_invisible_annotations = NULL;
2341 int runtime_invisible_annotations_length = 0;
2342 const u1* runtime_visible_parameter_annotations = NULL;
2343 int runtime_visible_parameter_annotations_length = 0;
2344 const u1* runtime_invisible_parameter_annotations = NULL;
2345 int runtime_invisible_parameter_annotations_length = 0;
2346 const u1* runtime_visible_type_annotations = NULL;
2347 int runtime_visible_type_annotations_length = 0;
2348 const u1* runtime_invisible_type_annotations = NULL;
2349 int runtime_invisible_type_annotations_length = 0;
2350 bool runtime_invisible_annotations_exists = false;
2351 bool runtime_invisible_type_annotations_exists = false;
2352 bool runtime_invisible_parameter_annotations_exists = false;
2353 const u1* annotation_default = NULL;
2354 int annotation_default_length = 0;
2355
2356 // Parse code and exceptions attribute
2357 u2 method_attributes_count = cfs->get_u2_fast();
2358 while (method_attributes_count--) {
2359 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2360 const u2 method_attribute_name_index = cfs->get_u2_fast();
2361 const u4 method_attribute_length = cfs->get_u4_fast();
2362 check_property(
2363 valid_symbol_at(method_attribute_name_index),
2364 "Invalid method attribute name index %u in class file %s",
2365 method_attribute_name_index, CHECK_NULL);
2366
2367 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2368 if (method_attribute_name == vmSymbols::tag_code()) {
2369 // Parse Code attribute
2370 if (_need_verify) {
2371 guarantee_property(
2372 !access_flags.is_native() && !access_flags.is_abstract(),
2373 "Code attribute in native or abstract methods in class file %s",
2374 CHECK_NULL);
2375 }
2376 if (parsed_code_attribute) {
2377 classfile_parse_error("Multiple Code attributes in class file %s",
2378 THREAD);
2379 return NULL;
2380 }
2381 parsed_code_attribute = true;
2382
2383 // Stack size, locals size, and code size
2384 cfs->guarantee_more(8, CHECK_NULL);
2385 max_stack = cfs->get_u2_fast();
2386 max_locals = cfs->get_u2_fast();
2387 code_length = cfs->get_u4_fast();
2388 if (_need_verify) {
2389 guarantee_property(args_size <= max_locals,
2390 "Arguments can't fit into locals in class file %s",
2391 CHECK_NULL);
2392 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2393 "Invalid method Code length %u in class file %s",
2394 code_length, CHECK_NULL);
2395 }
2396 // Code pointer
2397 code_start = cfs->current();
2398 assert(code_start != NULL, "null code start");
2399 cfs->guarantee_more(code_length, CHECK_NULL);
2400 cfs->skip_u1_fast(code_length);
2401
2402 // Exception handler table
2403 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2404 exception_table_length = cfs->get_u2_fast();
2405 if (exception_table_length > 0) {
2406 exception_table_start = parse_exception_table(cfs,
2407 code_length,
2408 exception_table_length,
2409 CHECK_NULL);
2410 }
2411
2412 // Parse additional attributes in code attribute
2413 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2414 u2 code_attributes_count = cfs->get_u2_fast();
2415
2416 unsigned int calculated_attribute_length = 0;
2417
2418 calculated_attribute_length =
2419 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2420 calculated_attribute_length +=
2421 code_length +
2422 sizeof(exception_table_length) +
2423 sizeof(code_attributes_count) +
2424 exception_table_length *
2425 ( sizeof(u2) + // start_pc
2426 sizeof(u2) + // end_pc
2427 sizeof(u2) + // handler_pc
2428 sizeof(u2) ); // catch_type_index
2429
2430 while (code_attributes_count--) {
2431 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2432 const u2 code_attribute_name_index = cfs->get_u2_fast();
2433 const u4 code_attribute_length = cfs->get_u4_fast();
2434 calculated_attribute_length += code_attribute_length +
2435 sizeof(code_attribute_name_index) +
2436 sizeof(code_attribute_length);
2437 check_property(valid_symbol_at(code_attribute_name_index),
2438 "Invalid code attribute name index %u in class file %s",
2439 code_attribute_name_index,
2440 CHECK_NULL);
2441 if (LoadLineNumberTables &&
2442 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2443 // Parse and compress line number table
2444 parse_linenumber_table(code_attribute_length,
2445 code_length,
2446 &linenumber_table,
2447 CHECK_NULL);
2448
2449 } else if (LoadLocalVariableTables &&
2450 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2451 // Parse local variable table
2452 if (!lvt_allocated) {
2453 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2454 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2455 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2456 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2457 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2458 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2459 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2460 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2461 lvt_allocated = true;
2462 }
2463 if (lvt_cnt == max_lvt_cnt) {
2464 max_lvt_cnt <<= 1;
2465 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2466 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2467 }
2468 localvariable_table_start[lvt_cnt] =
2469 parse_localvariable_table(cfs,
2470 code_length,
2471 max_locals,
2472 code_attribute_length,
2473 &localvariable_table_length[lvt_cnt],
2474 false, // is not LVTT
2475 CHECK_NULL);
2476 total_lvt_length += localvariable_table_length[lvt_cnt];
2477 lvt_cnt++;
2478 } else if (LoadLocalVariableTypeTables &&
2479 _major_version >= JAVA_1_5_VERSION &&
2480 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2481 if (!lvt_allocated) {
2482 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2483 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2484 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2485 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2486 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2487 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2488 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2489 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2490 lvt_allocated = true;
2491 }
2492 // Parse local variable type table
2493 if (lvtt_cnt == max_lvtt_cnt) {
2494 max_lvtt_cnt <<= 1;
2495 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2496 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2497 }
2498 localvariable_type_table_start[lvtt_cnt] =
2499 parse_localvariable_table(cfs,
2500 code_length,
2501 max_locals,
2502 code_attribute_length,
2503 &localvariable_type_table_length[lvtt_cnt],
2504 true, // is LVTT
2505 CHECK_NULL);
2506 lvtt_cnt++;
2507 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2508 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2509 // Stack map is only needed by the new verifier in JDK1.5.
2510 if (parsed_stackmap_attribute) {
2511 classfile_parse_error("Multiple StackMapTable attributes in class file %s", THREAD);
2512 return NULL;
2513 }
2514 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2515 stackmap_data_length = code_attribute_length;
2516 parsed_stackmap_attribute = true;
2517 } else {
2518 // Skip unknown attributes
2519 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2520 }
2521 }
2522 // check method attribute length
2523 if (_need_verify) {
2524 guarantee_property(method_attribute_length == calculated_attribute_length,
2525 "Code segment has wrong length in class file %s",
2526 CHECK_NULL);
2527 }
2528 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2529 // Parse Exceptions attribute
2530 if (parsed_checked_exceptions_attribute) {
2531 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2532 THREAD);
2533 return NULL;
2534 }
2535 parsed_checked_exceptions_attribute = true;
2536 checked_exceptions_start =
2537 parse_checked_exceptions(cfs,
2538 &checked_exceptions_length,
2539 method_attribute_length,
2540 CHECK_NULL);
2541 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2542 // reject multiple method parameters
2543 if (method_parameters_seen) {
2544 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2545 THREAD);
2546 return NULL;
2547 }
2548 method_parameters_seen = true;
2549 method_parameters_length = cfs->get_u1_fast();
2550 const u2 real_length = (method_parameters_length * 4u) + 1u;
2551 if (method_attribute_length != real_length) {
2552 classfile_parse_error(
2553 "Invalid MethodParameters method attribute length %u in class file",
2554 method_attribute_length, THREAD);
2555 return NULL;
2556 }
2557 method_parameters_data = cfs->current();
2558 cfs->skip_u2_fast(method_parameters_length);
2559 cfs->skip_u2_fast(method_parameters_length);
2560 // ignore this attribute if it cannot be reflected
2561 if (!vmClasses::Parameter_klass_loaded())
2562 method_parameters_length = -1;
2563 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2564 if (method_attribute_length != 0) {
2565 classfile_parse_error(
2566 "Invalid Synthetic method attribute length %u in class file %s",
2567 method_attribute_length, THREAD);
2568 return NULL;
2569 }
2570 // Should we check that there hasn't already been a synthetic attribute?
2571 access_flags.set_is_synthetic();
2572 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2573 if (method_attribute_length != 0) {
2574 classfile_parse_error(
2575 "Invalid Deprecated method attribute length %u in class file %s",
2576 method_attribute_length, THREAD);
2577 return NULL;
2578 }
2579 } else if (_major_version >= JAVA_1_5_VERSION) {
2580 if (method_attribute_name == vmSymbols::tag_signature()) {
2581 if (generic_signature_index != 0) {
2582 classfile_parse_error(
2583 "Multiple Signature attributes for method in class file %s",
2584 THREAD);
2585 return NULL;
2586 }
2587 if (method_attribute_length != 2) {
2588 classfile_parse_error(
2589 "Invalid Signature attribute length %u in class file %s",
2590 method_attribute_length, THREAD);
2591 return NULL;
2592 }
2593 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2594 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2595 if (runtime_visible_annotations != NULL) {
2596 classfile_parse_error(
2597 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2598 THREAD);
2599 return NULL;
2600 }
2601 runtime_visible_annotations_length = method_attribute_length;
2602 runtime_visible_annotations = cfs->current();
2603 assert(runtime_visible_annotations != NULL, "null visible annotations");
2604 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2605 parse_annotations(cp,
2606 runtime_visible_annotations,
2607 runtime_visible_annotations_length,
2608 &parsed_annotations,
2609 _loader_data,
2610 _can_access_vm_annotations);
2611 cfs->skip_u1_fast(runtime_visible_annotations_length);
2612 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2613 if (runtime_invisible_annotations_exists) {
2614 classfile_parse_error(
2615 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2616 THREAD);
2617 return NULL;
2618 }
2619 runtime_invisible_annotations_exists = true;
2620 if (PreserveAllAnnotations) {
2621 runtime_invisible_annotations_length = method_attribute_length;
2622 runtime_invisible_annotations = cfs->current();
2623 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2624 }
2625 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2626 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2627 if (runtime_visible_parameter_annotations != NULL) {
2628 classfile_parse_error(
2629 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2630 THREAD);
2631 return NULL;
2632 }
2633 runtime_visible_parameter_annotations_length = method_attribute_length;
2634 runtime_visible_parameter_annotations = cfs->current();
2635 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2636 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2637 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2638 if (runtime_invisible_parameter_annotations_exists) {
2639 classfile_parse_error(
2640 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2641 THREAD);
2642 return NULL;
2643 }
2644 runtime_invisible_parameter_annotations_exists = true;
2645 if (PreserveAllAnnotations) {
2646 runtime_invisible_parameter_annotations_length = method_attribute_length;
2647 runtime_invisible_parameter_annotations = cfs->current();
2648 assert(runtime_invisible_parameter_annotations != NULL,
2649 "null invisible parameter annotations");
2650 }
2651 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2652 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2653 if (annotation_default != NULL) {
2654 classfile_parse_error(
2655 "Multiple AnnotationDefault attributes for method in class file %s",
2656 THREAD);
2657 return NULL;
2658 }
2659 annotation_default_length = method_attribute_length;
2660 annotation_default = cfs->current();
2661 assert(annotation_default != NULL, "null annotation default");
2662 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2663 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2664 if (runtime_visible_type_annotations != NULL) {
2665 classfile_parse_error(
2666 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2667 THREAD);
2668 return NULL;
2669 }
2670 runtime_visible_type_annotations_length = method_attribute_length;
2671 runtime_visible_type_annotations = cfs->current();
2672 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2673 // No need for the VM to parse Type annotations
2674 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2675 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2676 if (runtime_invisible_type_annotations_exists) {
2677 classfile_parse_error(
2678 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2679 THREAD);
2680 return NULL;
2681 } else {
2682 runtime_invisible_type_annotations_exists = true;
2683 }
2684 if (PreserveAllAnnotations) {
2685 runtime_invisible_type_annotations_length = method_attribute_length;
2686 runtime_invisible_type_annotations = cfs->current();
2687 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2688 }
2689 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2690 } else {
2691 // Skip unknown attributes
2692 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2693 }
2694 } else {
2695 // Skip unknown attributes
2696 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2697 }
2698 }
2699
2700 if (linenumber_table != NULL) {
2701 linenumber_table->write_terminator();
2702 linenumber_table_length = linenumber_table->position();
2703 }
2704
2705 // Make sure there's at least one Code attribute in non-native/non-abstract method
2706 if (_need_verify) {
2707 guarantee_property(access_flags.is_native() ||
2708 access_flags.is_abstract() ||
2709 parsed_code_attribute,
2710 "Absent Code attribute in method that is not native or abstract in class file %s",
2711 CHECK_NULL);
2712 }
2713
2714 // All sizing information for a Method* is finally available, now create it
2715 InlineTableSizes sizes(
2716 total_lvt_length,
2717 linenumber_table_length,
2718 exception_table_length,
2719 checked_exceptions_length,
2720 method_parameters_length,
2721 generic_signature_index,
2722 runtime_visible_annotations_length +
2723 runtime_invisible_annotations_length,
2724 runtime_visible_parameter_annotations_length +
2725 runtime_invisible_parameter_annotations_length,
2726 runtime_visible_type_annotations_length +
2727 runtime_invisible_type_annotations_length,
2728 annotation_default_length,
2729 0);
2730
2731 Method* const m = Method::allocate(_loader_data,
2732 code_length,
2733 access_flags,
2734 &sizes,
2735 ConstMethod::NORMAL,
2736 CHECK_NULL);
2737
2738 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2739
2740 // Fill in information from fixed part (access_flags already set)
2741 m->set_constants(_cp);
2742 m->set_name_index(name_index);
2743 m->set_signature_index(signature_index);
2744 m->compute_from_signature(cp->symbol_at(signature_index));
2745 assert(args_size < 0 || args_size == m->size_of_parameters(), "");
2746
2747 // Fill in code attribute information
2748 m->set_max_stack(max_stack);
2749 m->set_max_locals(max_locals);
2750 if (stackmap_data != NULL) {
2751 m->constMethod()->copy_stackmap_data(_loader_data,
2752 (u1*)stackmap_data,
2753 stackmap_data_length,
2754 CHECK_NULL);
2755 }
2756
2757 // Copy byte codes
2758 m->set_code((u1*)code_start);
2759
2760 // Copy line number table
2761 if (linenumber_table != NULL) {
2762 memcpy(m->compressed_linenumber_table(),
2763 linenumber_table->buffer(),
2764 linenumber_table_length);
2765 }
2766
2767 // Copy exception table
2768 if (exception_table_length > 0) {
2769 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2770 m->exception_table_start(),
2771 exception_table_length * sizeof(ExceptionTableElement),
2772 sizeof(u2));
2773 }
2774
2775 // Copy method parameters
2776 if (method_parameters_length > 0) {
2777 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2778 for (int i = 0; i < method_parameters_length; i++) {
2779 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2780 method_parameters_data += 2;
2781 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2782 method_parameters_data += 2;
2783 }
2784 }
2785
2786 // Copy checked exceptions
2787 if (checked_exceptions_length > 0) {
2788 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2789 m->checked_exceptions_start(),
2790 checked_exceptions_length * sizeof(CheckedExceptionElement),
2791 sizeof(u2));
2792 }
2793
2794 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2795 if (total_lvt_length > 0) {
2796 promoted_flags->set_has_localvariable_table();
2797 copy_localvariable_table(m->constMethod(),
2798 lvt_cnt,
2799 localvariable_table_length,
2800 localvariable_table_start,
2801 lvtt_cnt,
2802 localvariable_type_table_length,
2803 localvariable_type_table_start,
2804 CHECK_NULL);
2805 }
2806
2807 if (parsed_annotations.has_any_annotations())
2808 parsed_annotations.apply_to(methodHandle(THREAD, m));
2809
2810 if (is_hidden()) { // Mark methods in hidden classes as 'hidden'.
2811 m->set_hidden(true);
2812 }
2813
2814 // Copy annotations
2815 copy_method_annotations(m->constMethod(),
2816 runtime_visible_annotations,
2817 runtime_visible_annotations_length,
2818 runtime_invisible_annotations,
2819 runtime_invisible_annotations_length,
2820 runtime_visible_parameter_annotations,
2821 runtime_visible_parameter_annotations_length,
2822 runtime_invisible_parameter_annotations,
2823 runtime_invisible_parameter_annotations_length,
2824 runtime_visible_type_annotations,
2825 runtime_visible_type_annotations_length,
2826 runtime_invisible_type_annotations,
2827 runtime_invisible_type_annotations_length,
2828 annotation_default,
2829 annotation_default_length,
2830 CHECK_NULL);
2831
2832 if (name == vmSymbols::finalize_method_name() &&
2833 signature == vmSymbols::void_method_signature()) {
2834 if (m->is_empty_method()) {
2835 _has_empty_finalizer = true;
2836 } else {
2837 _has_finalizer = true;
2838 }
2839 }
2840 if (name == vmSymbols::object_initializer_name() &&
2841 signature == vmSymbols::void_method_signature() &&
2842 m->is_vanilla_constructor()) {
2843 _has_vanilla_constructor = true;
2844 }
2845
2846 NOT_PRODUCT(m->verify());
2847 return m;
2848 }
2849
2850
2851 // The promoted_flags parameter is used to pass relevant access_flags
2852 // from the methods back up to the containing klass. These flag values
2853 // are added to klass's access_flags.
2854 // Side-effects: populates the _methods field in the parser
2855 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2856 bool is_interface,
2857 AccessFlags* promoted_flags,
2858 bool* has_final_method,
2859 bool* declares_nonstatic_concrete_methods,
2860 TRAPS) {
2861 assert(cfs != NULL, "invariant");
2862 assert(promoted_flags != NULL, "invariant");
2863 assert(has_final_method != NULL, "invariant");
2864 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2865
2866 assert(NULL == _methods, "invariant");
2867
2868 cfs->guarantee_more(2, CHECK); // length
2869 const u2 length = cfs->get_u2_fast();
2870 if (length == 0) {
2871 _methods = Universe::the_empty_method_array();
2872 } else {
2873 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2874 length,
2875 NULL,
2876 CHECK);
2877
2878 for (int index = 0; index < length; index++) {
2879 Method* method = parse_method(cfs,
2880 is_interface,
2881 _cp,
2882 promoted_flags,
2883 CHECK);
2884
2885 if (method->is_final()) {
2886 *has_final_method = true;
2887 }
2888 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2889 // used for interface initialization, and default method inheritance analysis
2890 if (is_interface && !(*declares_nonstatic_concrete_methods)
2891 && !method->is_abstract() && !method->is_static()) {
2892 *declares_nonstatic_concrete_methods = true;
2893 }
2894 _methods->at_put(index, method);
2895 }
2896
2897 if (_need_verify && length > 1) {
2898 // Check duplicated methods
2899 ResourceMark rm(THREAD);
2900 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2901 THREAD, NameSigHash*, HASH_ROW_SIZE);
2902 initialize_hashtable(names_and_sigs);
2903 bool dup = false;
2904 const Symbol* name = NULL;
2905 const Symbol* sig = NULL;
2906 {
2907 debug_only(NoSafepointVerifier nsv;)
2908 for (int i = 0; i < length; i++) {
2909 const Method* const m = _methods->at(i);
2910 name = m->name();
2911 sig = m->signature();
2912 // If no duplicates, add name/signature in hashtable names_and_sigs.
2913 if (!put_after_lookup(name, sig, names_and_sigs)) {
2914 dup = true;
2915 break;
2916 }
2917 }
2918 }
2919 if (dup) {
2920 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2921 name->as_C_string(), sig->as_klass_external_name(), THREAD);
2922 }
2923 }
2924 }
2925 }
2926
2927 static const intArray* sort_methods(Array<Method*>* methods) {
2928 const int length = methods->length();
2929 // If JVMTI original method ordering or sharing is enabled we have to
2930 // remember the original class file ordering.
2931 // We temporarily use the vtable_index field in the Method* to store the
2932 // class file index, so we can read in after calling qsort.
2933 // Put the method ordering in the shared archive.
2934 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
2935 for (int index = 0; index < length; index++) {
2936 Method* const m = methods->at(index);
2937 assert(!m->valid_vtable_index(), "vtable index should not be set");
2938 m->set_vtable_index(index);
2939 }
2940 }
2941 // Sort method array by ascending method name (for faster lookups & vtable construction)
2942 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2943 Method::sort_methods(methods);
2944
2945 intArray* method_ordering = NULL;
2946 // If JVMTI original method ordering or sharing is enabled construct int
2947 // array remembering the original ordering
2948 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
2949 method_ordering = new intArray(length, length, -1);
2950 for (int index = 0; index < length; index++) {
2951 Method* const m = methods->at(index);
2952 const int old_index = m->vtable_index();
2953 assert(old_index >= 0 && old_index < length, "invalid method index");
2954 method_ordering->at_put(index, old_index);
2955 m->set_vtable_index(Method::invalid_vtable_index);
2956 }
2957 }
2958 return method_ordering;
2959 }
2960
2961 // Parse generic_signature attribute for methods and fields
2962 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2963 TRAPS) {
2964 assert(cfs != NULL, "invariant");
2965
2966 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2967 const u2 generic_signature_index = cfs->get_u2_fast();
2968 check_property(
2969 valid_symbol_at(generic_signature_index),
2970 "Invalid Signature attribute at constant pool index %u in class file %s",
2971 generic_signature_index, CHECK_0);
2972 return generic_signature_index;
2973 }
2974
2975 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2976 TRAPS) {
2977
2978 assert(cfs != NULL, "invariant");
2979
2980 cfs->guarantee_more(2, CHECK); // sourcefile_index
2981 const u2 sourcefile_index = cfs->get_u2_fast();
2982 check_property(
2983 valid_symbol_at(sourcefile_index),
2984 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2985 sourcefile_index, CHECK);
2986 set_class_sourcefile_index(sourcefile_index);
2987 }
2988
2989 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2990 int length,
2991 TRAPS) {
2992 assert(cfs != NULL, "invariant");
2993
2994 const u1* const sde_buffer = cfs->current();
2995 assert(sde_buffer != NULL, "null sde buffer");
2996
2997 // Don't bother storing it if there is no way to retrieve it
2998 if (JvmtiExport::can_get_source_debug_extension()) {
2999 assert((length+1) > length, "Overflow checking");
3000 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3001 for (int i = 0; i < length; i++) {
3002 sde[i] = sde_buffer[i];
3003 }
3004 sde[length] = '\0';
3005 set_class_sde_buffer((const char*)sde, length);
3006 }
3007 // Got utf8 string, set stream position forward
3008 cfs->skip_u1(length, CHECK);
3009 }
3010
3011
3012 // Inner classes can be static, private or protected (classic VM does this)
3013 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3014 JVM_ACC_PRIVATE | \
3015 JVM_ACC_PROTECTED | \
3016 JVM_ACC_STATIC \
3017 )
3018
3019 // Find index of the InnerClasses entry for the specified inner_class_info_index.
3020 // Return -1 if none is found.
3021 static int inner_classes_find_index(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
3022 Symbol* cp_klass_name = cp->klass_name_at(inner);
3023 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
3024 int idx_inner = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
3025 if (cp->klass_name_at(idx_inner) == cp_klass_name) {
3026 return idx;
3027 }
3028 }
3029 return -1;
3030 }
3031
3032 // Return the outer_class_info_index for the InnerClasses entry containing the
3033 // specified inner_class_info_index. Return -1 if no InnerClasses entry is found.
3034 static int inner_classes_jump_to_outer(const Array<u2>* inner_classes, int inner, const ConstantPool* cp, int length) {
3035 if (inner == 0) return -1;
3036 int idx = inner_classes_find_index(inner_classes, inner, cp, length);
3037 if (idx == -1) return -1;
3038 int result = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
3039 return result;
3040 }
3041
3042 // Return true if circularity is found, false if no circularity is found.
3043 // Use Floyd's cycle finding algorithm.
3044 static bool inner_classes_check_loop_through_outer(const Array<u2>* inner_classes, int idx, const ConstantPool* cp, int length) {
3045 int slow = inner_classes->at(idx + InstanceKlass::inner_class_inner_class_info_offset);
3046 int fast = inner_classes->at(idx + InstanceKlass::inner_class_outer_class_info_offset);
3047
3048 while (fast != -1 && fast != 0) {
3049 if (slow != 0 && (cp->klass_name_at(slow) == cp->klass_name_at(fast))) {
3050 return true; // found a circularity
3051 }
3052 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
3053 if (fast == -1) return false;
3054 fast = inner_classes_jump_to_outer(inner_classes, fast, cp, length);
3055 if (fast == -1) return false;
3056 slow = inner_classes_jump_to_outer(inner_classes, slow, cp, length);
3057 assert(slow != -1, "sanity check");
3058 }
3059 return false;
3060 }
3061
3062 // Loop through each InnerClasses entry checking for circularities and duplications
3063 // with other entries. If duplicate entries are found then throw CFE. Otherwise,
3064 // return true if a circularity or entries with duplicate inner_class_info_indexes
3065 // are found.
3066 bool ClassFileParser::check_inner_classes_circularity(const ConstantPool* cp, int length, TRAPS) {
3067 // Loop through each InnerClasses entry.
3068 for (int idx = 0; idx < length; idx += InstanceKlass::inner_class_next_offset) {
3069 // Return true if there are circular entries.
3070 if (inner_classes_check_loop_through_outer(_inner_classes, idx, cp, length)) {
3071 return true;
3072 }
3073 // Check if there are duplicate entries or entries with the same inner_class_info_index.
3074 for (int y = idx + InstanceKlass::inner_class_next_offset; y < length;
3075 y += InstanceKlass::inner_class_next_offset) {
3076
3077 // 4347400: make sure there's no duplicate entry in the classes array
3078 if (_major_version >= JAVA_1_5_VERSION) {
3079 guarantee_property((_inner_classes->at(idx) != _inner_classes->at(y) ||
3080 _inner_classes->at(idx+1) != _inner_classes->at(y+1) ||
3081 _inner_classes->at(idx+2) != _inner_classes->at(y+2) ||
3082 _inner_classes->at(idx+3) != _inner_classes->at(y+3)),
3083 "Duplicate entry in InnerClasses attribute in class file %s",
3084 CHECK_(true));
3085 }
3086 // Return true if there are two entries with the same inner_class_info_index.
3087 if (_inner_classes->at(y) == _inner_classes->at(idx)) {
3088 return true;
3089 }
3090 }
3091 }
3092 return false;
3093 }
3094
3095 // Return number of classes in the inner classes attribute table
3096 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3097 const ConstantPool* cp,
3098 const u1* const inner_classes_attribute_start,
3099 bool parsed_enclosingmethod_attribute,
3100 u2 enclosing_method_class_index,
3101 u2 enclosing_method_method_index,
3102 TRAPS) {
3103 const u1* const current_mark = cfs->current();
3104 u2 length = 0;
3105 if (inner_classes_attribute_start != NULL) {
3106 cfs->set_current(inner_classes_attribute_start);
3107 cfs->guarantee_more(2, CHECK_0); // length
3108 length = cfs->get_u2_fast();
3109 }
3110
3111 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3112 // method data:
3113 // [inner_class_info_index,
3114 // outer_class_info_index,
3115 // inner_name_index,
3116 // inner_class_access_flags,
3117 // ...
3118 // enclosing_method_class_index,
3119 // enclosing_method_method_index]
3120 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3121 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3122 _inner_classes = inner_classes;
3123
3124 int index = 0;
3125 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3126 for (int n = 0; n < length; n++) {
3127 // Inner class index
3128 const u2 inner_class_info_index = cfs->get_u2_fast();
3129 check_property(
3130 valid_klass_reference_at(inner_class_info_index),
3131 "inner_class_info_index %u has bad constant type in class file %s",
3132 inner_class_info_index, CHECK_0);
3133 // Outer class index
3134 const u2 outer_class_info_index = cfs->get_u2_fast();
3135 check_property(
3136 outer_class_info_index == 0 ||
3137 valid_klass_reference_at(outer_class_info_index),
3138 "outer_class_info_index %u has bad constant type in class file %s",
3139 outer_class_info_index, CHECK_0);
3140
3141 if (outer_class_info_index != 0) {
3142 const Symbol* const outer_class_name = cp->klass_name_at(outer_class_info_index);
3143 char* bytes = (char*)outer_class_name->bytes();
3144 guarantee_property(bytes[0] != JVM_SIGNATURE_ARRAY,
3145 "Outer class is an array class in class file %s", CHECK_0);
3146 }
3147 // Inner class name
3148 const u2 inner_name_index = cfs->get_u2_fast();
3149 check_property(
3150 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3151 "inner_name_index %u has bad constant type in class file %s",
3152 inner_name_index, CHECK_0);
3153 if (_need_verify) {
3154 guarantee_property(inner_class_info_index != outer_class_info_index,
3155 "Class is both outer and inner class in class file %s", CHECK_0);
3156 }
3157 // Access flags
3158 jint flags;
3159 // JVM_ACC_MODULE is defined in JDK-9 and later.
3160 if (_major_version >= JAVA_9_VERSION) {
3161 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3162 } else {
3163 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3164 }
3165 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3166 // Set abstract bit for old class files for backward compatibility
3167 flags |= JVM_ACC_ABSTRACT;
3168 }
3169 verify_legal_class_modifiers(flags, CHECK_0);
3170 AccessFlags inner_access_flags(flags);
3171
3172 inner_classes->at_put(index++, inner_class_info_index);
3173 inner_classes->at_put(index++, outer_class_info_index);
3174 inner_classes->at_put(index++, inner_name_index);
3175 inner_classes->at_put(index++, inner_access_flags.as_short());
3176 }
3177
3178 // Check for circular and duplicate entries.
3179 bool has_circularity = false;
3180 if (_need_verify) {
3181 has_circularity = check_inner_classes_circularity(cp, length * 4, CHECK_0);
3182 if (has_circularity) {
3183 // If circularity check failed then ignore InnerClasses attribute.
3184 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
3185 index = 0;
3186 if (parsed_enclosingmethod_attribute) {
3187 inner_classes = MetadataFactory::new_array<u2>(_loader_data, 2, CHECK_0);
3188 _inner_classes = inner_classes;
3189 } else {
3190 _inner_classes = Universe::the_empty_short_array();
3191 }
3192 }
3193 }
3194 // Set EnclosingMethod class and method indexes.
3195 if (parsed_enclosingmethod_attribute) {
3196 inner_classes->at_put(index++, enclosing_method_class_index);
3197 inner_classes->at_put(index++, enclosing_method_method_index);
3198 }
3199 assert(index == size || has_circularity, "wrong size");
3200
3201 // Restore buffer's current position.
3202 cfs->set_current(current_mark);
3203
3204 return length;
3205 }
3206
3207 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3208 const u1* const nest_members_attribute_start,
3209 TRAPS) {
3210 const u1* const current_mark = cfs->current();
3211 u2 length = 0;
3212 if (nest_members_attribute_start != NULL) {
3213 cfs->set_current(nest_members_attribute_start);
3214 cfs->guarantee_more(2, CHECK_0); // length
3215 length = cfs->get_u2_fast();
3216 }
3217 const int size = length;
3218 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3219 _nest_members = nest_members;
3220
3221 int index = 0;
3222 cfs->guarantee_more(2 * length, CHECK_0);
3223 for (int n = 0; n < length; n++) {
3224 const u2 class_info_index = cfs->get_u2_fast();
3225 check_property(
3226 valid_klass_reference_at(class_info_index),
3227 "Nest member class_info_index %u has bad constant type in class file %s",
3228 class_info_index, CHECK_0);
3229 nest_members->at_put(index++, class_info_index);
3230 }
3231 assert(index == size, "wrong size");
3232
3233 // Restore buffer's current position.
3234 cfs->set_current(current_mark);
3235
3236 return length;
3237 }
3238
3239 u2 ClassFileParser::parse_classfile_permitted_subclasses_attribute(const ClassFileStream* const cfs,
3240 const u1* const permitted_subclasses_attribute_start,
3241 TRAPS) {
3242 const u1* const current_mark = cfs->current();
3243 u2 length = 0;
3244 if (permitted_subclasses_attribute_start != NULL) {
3245 cfs->set_current(permitted_subclasses_attribute_start);
3246 cfs->guarantee_more(2, CHECK_0); // length
3247 length = cfs->get_u2_fast();
3248 }
3249 const int size = length;
3250 Array<u2>* const permitted_subclasses = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3251 _permitted_subclasses = permitted_subclasses;
3252
3253 if (length > 0) {
3254 int index = 0;
3255 cfs->guarantee_more(2 * length, CHECK_0);
3256 for (int n = 0; n < length; n++) {
3257 const u2 class_info_index = cfs->get_u2_fast();
3258 check_property(
3259 valid_klass_reference_at(class_info_index),
3260 "Permitted subclass class_info_index %u has bad constant type in class file %s",
3261 class_info_index, CHECK_0);
3262 permitted_subclasses->at_put(index++, class_info_index);
3263 }
3264 assert(index == size, "wrong size");
3265 }
3266
3267 // Restore buffer's current position.
3268 cfs->set_current(current_mark);
3269
3270 return length;
3271 }
3272
3273 // Record {
3274 // u2 attribute_name_index;
3275 // u4 attribute_length;
3276 // u2 components_count;
3277 // component_info components[components_count];
3278 // }
3279 // component_info {
3280 // u2 name_index;
3281 // u2 descriptor_index
3282 // u2 attributes_count;
3283 // attribute_info_attributes[attributes_count];
3284 // }
3285 u2 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3286 const ConstantPool* cp,
3287 const u1* const record_attribute_start,
3288 TRAPS) {
3289 const u1* const current_mark = cfs->current();
3290 int components_count = 0;
3291 unsigned int calculate_attr_size = 0;
3292 if (record_attribute_start != NULL) {
3293 cfs->set_current(record_attribute_start);
3294 cfs->guarantee_more(2, CHECK_0); // num of components
3295 components_count = (int)cfs->get_u2_fast();
3296 calculate_attr_size = 2;
3297 }
3298
3299 Array<RecordComponent*>* const record_components =
3300 MetadataFactory::new_array<RecordComponent*>(_loader_data, components_count, NULL, CHECK_0);
3301 _record_components = record_components;
3302
3303 for (int x = 0; x < components_count; x++) {
3304 cfs->guarantee_more(6, CHECK_0); // name_index, descriptor_index, attributes_count
3305
3306 const u2 name_index = cfs->get_u2_fast();
3307 check_property(valid_symbol_at(name_index),
3308 "Invalid constant pool index %u for name in Record attribute in class file %s",
3309 name_index, CHECK_0);
3310 const Symbol* const name = cp->symbol_at(name_index);
3311 verify_legal_field_name(name, CHECK_0);
3312
3313 const u2 descriptor_index = cfs->get_u2_fast();
3314 check_property(valid_symbol_at(descriptor_index),
3315 "Invalid constant pool index %u for descriptor in Record attribute in class file %s",
3316 descriptor_index, CHECK_0);
3317 const Symbol* const descr = cp->symbol_at(descriptor_index);
3318 verify_legal_field_signature(name, descr, CHECK_0);
3319
3320 const u2 attributes_count = cfs->get_u2_fast();
3321 calculate_attr_size += 6;
3322 u2 generic_sig_index = 0;
3323 const u1* runtime_visible_annotations = NULL;
3324 int runtime_visible_annotations_length = 0;
3325 const u1* runtime_invisible_annotations = NULL;
3326 int runtime_invisible_annotations_length = 0;
3327 bool runtime_invisible_annotations_exists = false;
3328 const u1* runtime_visible_type_annotations = NULL;
3329 int runtime_visible_type_annotations_length = 0;
3330 const u1* runtime_invisible_type_annotations = NULL;
3331 int runtime_invisible_type_annotations_length = 0;
3332 bool runtime_invisible_type_annotations_exists = false;
3333
3334 // Expected attributes for record components are Signature, Runtime(In)VisibleAnnotations,
3335 // and Runtime(In)VisibleTypeAnnotations. Other attributes are ignored.
3336 for (int y = 0; y < attributes_count; y++) {
3337 cfs->guarantee_more(6, CHECK_0); // attribute_name_index, attribute_length
3338 const u2 attribute_name_index = cfs->get_u2_fast();
3339 const u4 attribute_length = cfs->get_u4_fast();
3340 calculate_attr_size += 6;
3341 check_property(
3342 valid_symbol_at(attribute_name_index),
3343 "Invalid Record attribute name index %u in class file %s",
3344 attribute_name_index, CHECK_0);
3345
3346 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
3347 if (attribute_name == vmSymbols::tag_signature()) {
3348 if (generic_sig_index != 0) {
3349 classfile_parse_error(
3350 "Multiple Signature attributes for Record component in class file %s",
3351 THREAD);
3352 return 0;
3353 }
3354 if (attribute_length != 2) {
3355 classfile_parse_error(
3356 "Invalid Signature attribute length %u in Record component in class file %s",
3357 attribute_length, THREAD);
3358 return 0;
3359 }
3360 generic_sig_index = parse_generic_signature_attribute(cfs, CHECK_0);
3361
3362 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
3363 if (runtime_visible_annotations != NULL) {
3364 classfile_parse_error(
3365 "Multiple RuntimeVisibleAnnotations attributes for Record component in class file %s", THREAD);
3366 return 0;
3367 }
3368 runtime_visible_annotations_length = attribute_length;
3369 runtime_visible_annotations = cfs->current();
3370
3371 assert(runtime_visible_annotations != NULL, "null record component visible annotation");
3372 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_0);
3373 cfs->skip_u1_fast(runtime_visible_annotations_length);
3374
3375 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
3376 if (runtime_invisible_annotations_exists) {
3377 classfile_parse_error(
3378 "Multiple RuntimeInvisibleAnnotations attributes for Record component in class file %s", THREAD);
3379 return 0;
3380 }
3381 runtime_invisible_annotations_exists = true;
3382 if (PreserveAllAnnotations) {
3383 runtime_invisible_annotations_length = attribute_length;
3384 runtime_invisible_annotations = cfs->current();
3385 assert(runtime_invisible_annotations != NULL, "null record component invisible annotation");
3386 }
3387 cfs->skip_u1(attribute_length, CHECK_0);
3388
3389 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
3390 if (runtime_visible_type_annotations != NULL) {
3391 classfile_parse_error(
3392 "Multiple RuntimeVisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3393 return 0;
3394 }
3395 runtime_visible_type_annotations_length = attribute_length;
3396 runtime_visible_type_annotations = cfs->current();
3397
3398 assert(runtime_visible_type_annotations != NULL, "null record component visible type annotation");
3399 cfs->guarantee_more(runtime_visible_type_annotations_length, CHECK_0);
3400 cfs->skip_u1_fast(runtime_visible_type_annotations_length);
3401
3402 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
3403 if (runtime_invisible_type_annotations_exists) {
3404 classfile_parse_error(
3405 "Multiple RuntimeInvisibleTypeAnnotations attributes for Record component in class file %s", THREAD);
3406 return 0;
3407 }
3408 runtime_invisible_type_annotations_exists = true;
3409 if (PreserveAllAnnotations) {
3410 runtime_invisible_type_annotations_length = attribute_length;
3411 runtime_invisible_type_annotations = cfs->current();
3412 assert(runtime_invisible_type_annotations != NULL, "null record component invisible type annotation");
3413 }
3414 cfs->skip_u1(attribute_length, CHECK_0);
3415
3416 } else {
3417 // Skip unknown attributes
3418 cfs->skip_u1(attribute_length, CHECK_0);
3419 }
3420 calculate_attr_size += attribute_length;
3421 } // End of attributes For loop
3422
3423 AnnotationArray* annotations = assemble_annotations(runtime_visible_annotations,
3424 runtime_visible_annotations_length,
3425 runtime_invisible_annotations,
3426 runtime_invisible_annotations_length,
3427 CHECK_0);
3428 AnnotationArray* type_annotations = assemble_annotations(runtime_visible_type_annotations,
3429 runtime_visible_type_annotations_length,
3430 runtime_invisible_type_annotations,
3431 runtime_invisible_type_annotations_length,
3432 CHECK_0);
3433
3434 RecordComponent* record_component =
3435 RecordComponent::allocate(_loader_data, name_index, descriptor_index,
3436 attributes_count, generic_sig_index,
3437 annotations, type_annotations, CHECK_0);
3438 record_components->at_put(x, record_component);
3439 } // End of component processing loop
3440
3441 // Restore buffer's current position.
3442 cfs->set_current(current_mark);
3443 return calculate_attr_size;
3444 }
3445
3446 void ClassFileParser::parse_classfile_synthetic_attribute() {
3447 set_class_synthetic_flag(true);
3448 }
3449
3450 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3451 assert(cfs != NULL, "invariant");
3452
3453 const u2 signature_index = cfs->get_u2(CHECK);
3454 check_property(
3455 valid_symbol_at(signature_index),
3456 "Invalid constant pool index %u in Signature attribute in class file %s",
3457 signature_index, CHECK);
3458 set_class_generic_signature_index(signature_index);
3459 }
3460
3461 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3462 ConstantPool* cp,
3463 u4 attribute_byte_length,
3464 TRAPS) {
3465 assert(cfs != NULL, "invariant");
3466 assert(cp != NULL, "invariant");
3467
3468 const u1* const current_start = cfs->current();
3469
3470 guarantee_property(attribute_byte_length >= sizeof(u2),
3471 "Invalid BootstrapMethods attribute length %u in class file %s",
3472 attribute_byte_length,
3473 CHECK);
3474
3475 cfs->guarantee_more(attribute_byte_length, CHECK);
3476
3477 const int attribute_array_length = cfs->get_u2_fast();
3478
3479 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3480 "Short length on BootstrapMethods in class file %s",
3481 CHECK);
3482
3483
3484 // The attribute contains a counted array of counted tuples of shorts,
3485 // represending bootstrap specifiers:
3486 // length*{bootstrap_method_index, argument_count*{argument_index}}
3487 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3488 // operand_count = number of shorts in attr, except for leading length
3489
3490 // The attribute is copied into a short[] array.
3491 // The array begins with a series of short[2] pairs, one for each tuple.
3492 const int index_size = (attribute_array_length * 2);
3493
3494 Array<u2>* const operands =
3495 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3496
3497 // Eagerly assign operands so they will be deallocated with the constant
3498 // pool if there is an error.
3499 cp->set_operands(operands);
3500
3501 int operand_fill_index = index_size;
3502 const int cp_size = cp->length();
3503
3504 for (int n = 0; n < attribute_array_length; n++) {
3505 // Store a 32-bit offset into the header of the operand array.
3506 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3507
3508 // Read a bootstrap specifier.
3509 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3510 const u2 bootstrap_method_index = cfs->get_u2_fast();
3511 const u2 argument_count = cfs->get_u2_fast();
3512 check_property(
3513 valid_cp_range(bootstrap_method_index, cp_size) &&
3514 cp->tag_at(bootstrap_method_index).is_method_handle(),
3515 "bootstrap_method_index %u has bad constant type in class file %s",
3516 bootstrap_method_index,
3517 CHECK);
3518
3519 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3520 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3521 CHECK);
3522
3523 operands->at_put(operand_fill_index++, bootstrap_method_index);
3524 operands->at_put(operand_fill_index++, argument_count);
3525
3526 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3527 for (int j = 0; j < argument_count; j++) {
3528 const u2 argument_index = cfs->get_u2_fast();
3529 check_property(
3530 valid_cp_range(argument_index, cp_size) &&
3531 cp->tag_at(argument_index).is_loadable_constant(),
3532 "argument_index %u has bad constant type in class file %s",
3533 argument_index,
3534 CHECK);
3535 operands->at_put(operand_fill_index++, argument_index);
3536 }
3537 }
3538 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3539 "Bad length on BootstrapMethods in class file %s",
3540 CHECK);
3541 }
3542
3543 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3544 ConstantPool* cp,
3545 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3546 TRAPS) {
3547 assert(cfs != NULL, "invariant");
3548 assert(cp != NULL, "invariant");
3549 assert(parsed_annotations != NULL, "invariant");
3550
3551 // Set inner classes attribute to default sentinel
3552 _inner_classes = Universe::the_empty_short_array();
3553 // Set nest members attribute to default sentinel
3554 _nest_members = Universe::the_empty_short_array();
3555 // Set _permitted_subclasses attribute to default sentinel
3556 _permitted_subclasses = Universe::the_empty_short_array();
3557 cfs->guarantee_more(2, CHECK); // attributes_count
3558 u2 attributes_count = cfs->get_u2_fast();
3559 bool parsed_sourcefile_attribute = false;
3560 bool parsed_innerclasses_attribute = false;
3561 bool parsed_nest_members_attribute = false;
3562 bool parsed_permitted_subclasses_attribute = false;
3563 bool parsed_nest_host_attribute = false;
3564 bool parsed_record_attribute = false;
3565 bool parsed_enclosingmethod_attribute = false;
3566 bool parsed_bootstrap_methods_attribute = false;
3567 const u1* runtime_visible_annotations = NULL;
3568 int runtime_visible_annotations_length = 0;
3569 const u1* runtime_invisible_annotations = NULL;
3570 int runtime_invisible_annotations_length = 0;
3571 const u1* runtime_visible_type_annotations = NULL;
3572 int runtime_visible_type_annotations_length = 0;
3573 const u1* runtime_invisible_type_annotations = NULL;
3574 int runtime_invisible_type_annotations_length = 0;
3575 bool runtime_invisible_type_annotations_exists = false;
3576 bool runtime_invisible_annotations_exists = false;
3577 bool parsed_source_debug_ext_annotations_exist = false;
3578 const u1* inner_classes_attribute_start = NULL;
3579 u4 inner_classes_attribute_length = 0;
3580 u2 enclosing_method_class_index = 0;
3581 u2 enclosing_method_method_index = 0;
3582 const u1* nest_members_attribute_start = NULL;
3583 u4 nest_members_attribute_length = 0;
3584 const u1* record_attribute_start = NULL;
3585 u4 record_attribute_length = 0;
3586 const u1* permitted_subclasses_attribute_start = NULL;
3587 u4 permitted_subclasses_attribute_length = 0;
3588
3589 // Iterate over attributes
3590 while (attributes_count--) {
3591 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3592 const u2 attribute_name_index = cfs->get_u2_fast();
3593 const u4 attribute_length = cfs->get_u4_fast();
3594 check_property(
3595 valid_symbol_at(attribute_name_index),
3596 "Attribute name has bad constant pool index %u in class file %s",
3597 attribute_name_index, CHECK);
3598 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3599 if (tag == vmSymbols::tag_source_file()) {
3600 // Check for SourceFile tag
3601 if (_need_verify) {
3602 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3603 }
3604 if (parsed_sourcefile_attribute) {
3605 classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3606 return;
3607 } else {
3608 parsed_sourcefile_attribute = true;
3609 }
3610 parse_classfile_sourcefile_attribute(cfs, CHECK);
3611 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3612 // Check for SourceDebugExtension tag
3613 if (parsed_source_debug_ext_annotations_exist) {
3614 classfile_parse_error(
3615 "Multiple SourceDebugExtension attributes in class file %s", THREAD);
3616 return;
3617 }
3618 parsed_source_debug_ext_annotations_exist = true;
3619 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3620 } else if (tag == vmSymbols::tag_inner_classes()) {
3621 // Check for InnerClasses tag
3622 if (parsed_innerclasses_attribute) {
3623 classfile_parse_error("Multiple InnerClasses attributes in class file %s", THREAD);
3624 return;
3625 } else {
3626 parsed_innerclasses_attribute = true;
3627 }
3628 inner_classes_attribute_start = cfs->current();
3629 inner_classes_attribute_length = attribute_length;
3630 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3631 } else if (tag == vmSymbols::tag_synthetic()) {
3632 // Check for Synthetic tag
3633 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3634 if (attribute_length != 0) {
3635 classfile_parse_error(
3636 "Invalid Synthetic classfile attribute length %u in class file %s",
3637 attribute_length, THREAD);
3638 return;
3639 }
3640 parse_classfile_synthetic_attribute();
3641 } else if (tag == vmSymbols::tag_deprecated()) {
3642 // Check for Deprecated tag - 4276120
3643 if (attribute_length != 0) {
3644 classfile_parse_error(
3645 "Invalid Deprecated classfile attribute length %u in class file %s",
3646 attribute_length, THREAD);
3647 return;
3648 }
3649 } else if (_major_version >= JAVA_1_5_VERSION) {
3650 if (tag == vmSymbols::tag_signature()) {
3651 if (_generic_signature_index != 0) {
3652 classfile_parse_error(
3653 "Multiple Signature attributes in class file %s", THREAD);
3654 return;
3655 }
3656 if (attribute_length != 2) {
3657 classfile_parse_error(
3658 "Wrong Signature attribute length %u in class file %s",
3659 attribute_length, THREAD);
3660 return;
3661 }
3662 parse_classfile_signature_attribute(cfs, CHECK);
3663 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3664 if (runtime_visible_annotations != NULL) {
3665 classfile_parse_error(
3666 "Multiple RuntimeVisibleAnnotations attributes in class file %s", THREAD);
3667 return;
3668 }
3669 runtime_visible_annotations_length = attribute_length;
3670 runtime_visible_annotations = cfs->current();
3671 assert(runtime_visible_annotations != NULL, "null visible annotations");
3672 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3673 parse_annotations(cp,
3674 runtime_visible_annotations,
3675 runtime_visible_annotations_length,
3676 parsed_annotations,
3677 _loader_data,
3678 _can_access_vm_annotations);
3679 cfs->skip_u1_fast(runtime_visible_annotations_length);
3680 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3681 if (runtime_invisible_annotations_exists) {
3682 classfile_parse_error(
3683 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", THREAD);
3684 return;
3685 }
3686 runtime_invisible_annotations_exists = true;
3687 if (PreserveAllAnnotations) {
3688 runtime_invisible_annotations_length = attribute_length;
3689 runtime_invisible_annotations = cfs->current();
3690 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3691 }
3692 cfs->skip_u1(attribute_length, CHECK);
3693 } else if (tag == vmSymbols::tag_enclosing_method()) {
3694 if (parsed_enclosingmethod_attribute) {
3695 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", THREAD);
3696 return;
3697 } else {
3698 parsed_enclosingmethod_attribute = true;
3699 }
3700 guarantee_property(attribute_length == 4,
3701 "Wrong EnclosingMethod attribute length %u in class file %s",
3702 attribute_length, CHECK);
3703 cfs->guarantee_more(4, CHECK); // class_index, method_index
3704 enclosing_method_class_index = cfs->get_u2_fast();
3705 enclosing_method_method_index = cfs->get_u2_fast();
3706 if (enclosing_method_class_index == 0) {
3707 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", THREAD);
3708 return;
3709 }
3710 // Validate the constant pool indices and types
3711 check_property(valid_klass_reference_at(enclosing_method_class_index),
3712 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3713 if (enclosing_method_method_index != 0 &&
3714 (!cp->is_within_bounds(enclosing_method_method_index) ||
3715 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3716 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", THREAD);
3717 return;
3718 }
3719 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3720 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3721 if (parsed_bootstrap_methods_attribute) {
3722 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", THREAD);
3723 return;
3724 }
3725 parsed_bootstrap_methods_attribute = true;
3726 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3727 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3728 if (runtime_visible_type_annotations != NULL) {
3729 classfile_parse_error(
3730 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", THREAD);
3731 return;
3732 }
3733 runtime_visible_type_annotations_length = attribute_length;
3734 runtime_visible_type_annotations = cfs->current();
3735 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3736 // No need for the VM to parse Type annotations
3737 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3738 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3739 if (runtime_invisible_type_annotations_exists) {
3740 classfile_parse_error(
3741 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", THREAD);
3742 return;
3743 } else {
3744 runtime_invisible_type_annotations_exists = true;
3745 }
3746 if (PreserveAllAnnotations) {
3747 runtime_invisible_type_annotations_length = attribute_length;
3748 runtime_invisible_type_annotations = cfs->current();
3749 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3750 }
3751 cfs->skip_u1(attribute_length, CHECK);
3752 } else if (_major_version >= JAVA_11_VERSION) {
3753 if (tag == vmSymbols::tag_nest_members()) {
3754 // Check for NestMembers tag
3755 if (parsed_nest_members_attribute) {
3756 classfile_parse_error("Multiple NestMembers attributes in class file %s", THREAD);
3757 return;
3758 } else {
3759 parsed_nest_members_attribute = true;
3760 }
3761 if (parsed_nest_host_attribute) {
3762 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", THREAD);
3763 return;
3764 }
3765 nest_members_attribute_start = cfs->current();
3766 nest_members_attribute_length = attribute_length;
3767 cfs->skip_u1(nest_members_attribute_length, CHECK);
3768 } else if (tag == vmSymbols::tag_nest_host()) {
3769 if (parsed_nest_host_attribute) {
3770 classfile_parse_error("Multiple NestHost attributes in class file %s", THREAD);
3771 return;
3772 } else {
3773 parsed_nest_host_attribute = true;
3774 }
3775 if (parsed_nest_members_attribute) {
3776 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", THREAD);
3777 return;
3778 }
3779 if (_need_verify) {
3780 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3781 }
3782 cfs->guarantee_more(2, CHECK);
3783 u2 class_info_index = cfs->get_u2_fast();
3784 check_property(
3785 valid_klass_reference_at(class_info_index),
3786 "Nest-host class_info_index %u has bad constant type in class file %s",
3787 class_info_index, CHECK);
3788 _nest_host = class_info_index;
3789
3790 } else if (_major_version >= JAVA_16_VERSION) {
3791 if (tag == vmSymbols::tag_record()) {
3792 if (parsed_record_attribute) {
3793 classfile_parse_error("Multiple Record attributes in class file %s", THREAD);
3794 return;
3795 }
3796 parsed_record_attribute = true;
3797 record_attribute_start = cfs->current();
3798 record_attribute_length = attribute_length;
3799 } else if (_major_version >= JAVA_17_VERSION) {
3800 if (tag == vmSymbols::tag_permitted_subclasses()) {
3801 if (parsed_permitted_subclasses_attribute) {
3802 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
3803 return;
3804 }
3805 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
3806 if (_access_flags.is_final()) {
3807 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
3808 return;
3809 }
3810 parsed_permitted_subclasses_attribute = true;
3811 permitted_subclasses_attribute_start = cfs->current();
3812 permitted_subclasses_attribute_length = attribute_length;
3813 }
3814 }
3815 // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
3816 cfs->skip_u1(attribute_length, CHECK);
3817 } else {
3818 // Unknown attribute
3819 cfs->skip_u1(attribute_length, CHECK);
3820 }
3821 } else {
3822 // Unknown attribute
3823 cfs->skip_u1(attribute_length, CHECK);
3824 }
3825 } else {
3826 // Unknown attribute
3827 cfs->skip_u1(attribute_length, CHECK);
3828 }
3829 }
3830 _class_annotations = assemble_annotations(runtime_visible_annotations,
3831 runtime_visible_annotations_length,
3832 runtime_invisible_annotations,
3833 runtime_invisible_annotations_length,
3834 CHECK);
3835 _class_type_annotations = assemble_annotations(runtime_visible_type_annotations,
3836 runtime_visible_type_annotations_length,
3837 runtime_invisible_type_annotations,
3838 runtime_invisible_type_annotations_length,
3839 CHECK);
3840
3841 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3842 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3843 cfs,
3844 cp,
3845 inner_classes_attribute_start,
3846 parsed_innerclasses_attribute,
3847 enclosing_method_class_index,
3848 enclosing_method_method_index,
3849 CHECK);
3850 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3851 guarantee_property(
3852 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3853 "Wrong InnerClasses attribute length in class file %s", CHECK);
3854 }
3855 }
3856
3857 if (parsed_nest_members_attribute) {
3858 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3859 cfs,
3860 nest_members_attribute_start,
3861 CHECK);
3862 if (_need_verify) {
3863 guarantee_property(
3864 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3865 "Wrong NestMembers attribute length in class file %s", CHECK);
3866 }
3867 }
3868
3869 if (parsed_record_attribute) {
3870 const unsigned int calculated_attr_length = parse_classfile_record_attribute(
3871 cfs,
3872 cp,
3873 record_attribute_start,
3874 CHECK);
3875 if (_need_verify) {
3876 guarantee_property(record_attribute_length == calculated_attr_length,
3877 "Record attribute has wrong length in class file %s",
3878 CHECK);
3879 }
3880 }
3881
3882 if (parsed_permitted_subclasses_attribute) {
3883 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
3884 cfs,
3885 permitted_subclasses_attribute_start,
3886 CHECK);
3887 if (_need_verify) {
3888 guarantee_property(
3889 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
3890 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
3891 }
3892 }
3893
3894 if (_max_bootstrap_specifier_index >= 0) {
3895 guarantee_property(parsed_bootstrap_methods_attribute,
3896 "Missing BootstrapMethods attribute in class file %s", CHECK);
3897 }
3898 }
3899
3900 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3901 assert(k != NULL, "invariant");
3902
3903 if (_synthetic_flag)
3904 k->set_is_synthetic();
3905 if (_sourcefile_index != 0) {
3906 k->set_source_file_name_index(_sourcefile_index);
3907 }
3908 if (_generic_signature_index != 0) {
3909 k->set_generic_signature_index(_generic_signature_index);
3910 }
3911 if (_sde_buffer != NULL) {
3912 k->set_source_debug_extension(_sde_buffer, _sde_length);
3913 }
3914 }
3915
3916 // Create the Annotations object that will
3917 // hold the annotations array for the Klass.
3918 void ClassFileParser::create_combined_annotations(TRAPS) {
3919 if (_class_annotations == NULL &&
3920 _class_type_annotations == NULL &&
3921 _fields_annotations == NULL &&
3922 _fields_type_annotations == NULL) {
3923 // Don't create the Annotations object unnecessarily.
3924 return;
3925 }
3926
3927 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3928 annotations->set_class_annotations(_class_annotations);
3929 annotations->set_class_type_annotations(_class_type_annotations);
3930 annotations->set_fields_annotations(_fields_annotations);
3931 annotations->set_fields_type_annotations(_fields_type_annotations);
3932
3933 // This is the Annotations object that will be
3934 // assigned to InstanceKlass being constructed.
3935 _combined_annotations = annotations;
3936
3937 // The annotations arrays below has been transfered the
3938 // _combined_annotations so these fields can now be cleared.
3939 _class_annotations = NULL;
3940 _class_type_annotations = NULL;
3941 _fields_annotations = NULL;
3942 _fields_type_annotations = NULL;
3943 }
3944
3945 // Transfer ownership of metadata allocated to the InstanceKlass.
3946 void ClassFileParser::apply_parsed_class_metadata(
3947 InstanceKlass* this_klass,
3948 int java_fields_count) {
3949 assert(this_klass != NULL, "invariant");
3950
3951 _cp->set_pool_holder(this_klass);
3952 this_klass->set_constants(_cp);
3953 this_klass->set_fields(_fields, java_fields_count);
3954 this_klass->set_methods(_methods);
3955 this_klass->set_inner_classes(_inner_classes);
3956 this_klass->set_nest_members(_nest_members);
3957 this_klass->set_nest_host_index(_nest_host);
3958 this_klass->set_annotations(_combined_annotations);
3959 this_klass->set_permitted_subclasses(_permitted_subclasses);
3960 this_klass->set_record_components(_record_components);
3961 // Delay the setting of _local_interfaces and _transitive_interfaces until after
3962 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
3963 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
3964 // its _super. If an OOM occurs while loading the current klass, its _super field
3965 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3966 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3967 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3968
3969 // Clear out these fields so they don't get deallocated by the destructor
3970 clear_class_metadata();
3971 }
3972
3973 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3974 int runtime_visible_annotations_length,
3975 const u1* const runtime_invisible_annotations,
3976 int runtime_invisible_annotations_length,
3977 TRAPS) {
3978 AnnotationArray* annotations = NULL;
3979 if (runtime_visible_annotations != NULL ||
3980 runtime_invisible_annotations != NULL) {
3981 annotations = MetadataFactory::new_array<u1>(_loader_data,
3982 runtime_visible_annotations_length +
3983 runtime_invisible_annotations_length,
3984 CHECK_(annotations));
3985 if (runtime_visible_annotations != NULL) {
3986 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3987 annotations->at_put(i, runtime_visible_annotations[i]);
3988 }
3989 }
3990 if (runtime_invisible_annotations != NULL) {
3991 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3992 int append = runtime_visible_annotations_length+i;
3993 annotations->at_put(append, runtime_invisible_annotations[i]);
3994 }
3995 }
3996 }
3997 return annotations;
3998 }
3999
4000 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
4001 const int super_class_index,
4002 const bool need_verify,
4003 TRAPS) {
4004 assert(cp != NULL, "invariant");
4005 const InstanceKlass* super_klass = NULL;
4006
4007 if (super_class_index == 0) {
4008 check_property(_class_name == vmSymbols::java_lang_Object(),
4009 "Invalid superclass index %u in class file %s",
4010 super_class_index,
4011 CHECK_NULL);
4012 } else {
4013 check_property(valid_klass_reference_at(super_class_index),
4014 "Invalid superclass index %u in class file %s",
4015 super_class_index,
4016 CHECK_NULL);
4017 // The class name should be legal because it is checked when parsing constant pool.
4018 // However, make sure it is not an array type.
4019 bool is_array = false;
4020 if (cp->tag_at(super_class_index).is_klass()) {
4021 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
4022 if (need_verify)
4023 is_array = super_klass->is_array_klass();
4024 } else if (need_verify) {
4025 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
4026 }
4027 if (need_verify) {
4028 guarantee_property(!is_array,
4029 "Bad superclass name in class file %s", CHECK_NULL);
4030 }
4031 }
4032 return super_klass;
4033 }
4034
4035 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
4036 _max_nonstatic_oop_maps = max_blocks;
4037 _nonstatic_oop_map_count = 0;
4038 if (max_blocks == 0) {
4039 _nonstatic_oop_maps = NULL;
4040 } else {
4041 _nonstatic_oop_maps =
4042 NEW_RESOURCE_ARRAY(OopMapBlock, _max_nonstatic_oop_maps);
4043 memset(_nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
4044 }
4045 }
4046
4047 OopMapBlock* OopMapBlocksBuilder::last_oop_map() const {
4048 assert(_nonstatic_oop_map_count > 0, "Has no oop maps");
4049 return _nonstatic_oop_maps + (_nonstatic_oop_map_count - 1);
4050 }
4051
4052 // addition of super oop maps
4053 void OopMapBlocksBuilder::initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
4054 assert(nof_blocks && _nonstatic_oop_map_count == 0 &&
4055 nof_blocks <= _max_nonstatic_oop_maps, "invariant");
4056
4057 memcpy(_nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
4058 _nonstatic_oop_map_count += nof_blocks;
4059 }
4060
4061 // collection of oops
4062 void OopMapBlocksBuilder::add(int offset, int count) {
4063 if (_nonstatic_oop_map_count == 0) {
4064 _nonstatic_oop_map_count++;
4065 }
4066 OopMapBlock* nonstatic_oop_map = last_oop_map();
4067 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
4068 nonstatic_oop_map->set_offset(offset);
4069 nonstatic_oop_map->set_count(count);
4070 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
4071 nonstatic_oop_map->increment_count(count);
4072 } else { // Need a new one...
4073 _nonstatic_oop_map_count++;
4074 assert(_nonstatic_oop_map_count <= _max_nonstatic_oop_maps, "range check");
4075 nonstatic_oop_map = last_oop_map();
4076 nonstatic_oop_map->set_offset(offset);
4077 nonstatic_oop_map->set_count(count);
4078 }
4079 }
4080
4081 // general purpose copy, e.g. into allocated instanceKlass
4082 void OopMapBlocksBuilder::copy(OopMapBlock* dst) {
4083 if (_nonstatic_oop_map_count != 0) {
4084 memcpy(dst, _nonstatic_oop_maps, sizeof(OopMapBlock) * _nonstatic_oop_map_count);
4085 }
4086 }
4087
4088 // Sort and compact adjacent blocks
4089 void OopMapBlocksBuilder::compact() {
4090 if (_nonstatic_oop_map_count <= 1) {
4091 return;
4092 }
4093 /*
4094 * Since field layout sneeks in oops before values, we will be able to condense
4095 * blocks. There is potential to compact between super, own refs and values
4096 * containing refs.
4097 *
4098 * Currently compaction is slightly limited due to values being 8 byte aligned.
4099 * This may well change: FixMe if it doesn't, the code below is fairly general purpose
4100 * and maybe it doesn't need to be.
4101 */
4102 qsort(_nonstatic_oop_maps, _nonstatic_oop_map_count, sizeof(OopMapBlock),
4103 (_sort_Fn)OopMapBlock::compare_offset);
4104 if (_nonstatic_oop_map_count < 2) {
4105 return;
4106 }
4107
4108 // Make a temp copy, and iterate through and copy back into the original
4109 ResourceMark rm;
4110 OopMapBlock* oop_maps_copy =
4111 NEW_RESOURCE_ARRAY(OopMapBlock, _nonstatic_oop_map_count);
4112 OopMapBlock* oop_maps_copy_end = oop_maps_copy + _nonstatic_oop_map_count;
4113 copy(oop_maps_copy);
4114 OopMapBlock* nonstatic_oop_map = _nonstatic_oop_maps;
4115 unsigned int new_count = 1;
4116 oop_maps_copy++;
4117 while(oop_maps_copy < oop_maps_copy_end) {
4118 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
4119 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
4120 nonstatic_oop_map->increment_count(oop_maps_copy->count());
4121 } else {
4122 nonstatic_oop_map++;
4123 new_count++;
4124 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
4125 nonstatic_oop_map->set_count(oop_maps_copy->count());
4126 }
4127 oop_maps_copy++;
4128 }
4129 assert(new_count <= _nonstatic_oop_map_count, "end up with more maps after compact() ?");
4130 _nonstatic_oop_map_count = new_count;
4131 }
4132
4133 void OopMapBlocksBuilder::print_on(outputStream* st) const {
4134 st->print_cr(" OopMapBlocks: %3d /%3d", _nonstatic_oop_map_count, _max_nonstatic_oop_maps);
4135 if (_nonstatic_oop_map_count > 0) {
4136 OopMapBlock* map = _nonstatic_oop_maps;
4137 OopMapBlock* last_map = last_oop_map();
4138 assert(map <= last_map, "Last less than first");
4139 while (map <= last_map) {
4140 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
4141 map->offset() + map->offset_span() - heapOopSize, map->count());
4142 map++;
4143 }
4144 }
4145 }
4146
4147 void OopMapBlocksBuilder::print_value_on(outputStream* st) const {
4148 print_on(st);
4149 }
4150
4151 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4152 assert(ik != NULL, "invariant");
4153
4154 const Klass* const super = ik->super();
4155
4156 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4157 // in which case we don't have to register objects as finalizable
4158 if (!_has_empty_finalizer) {
4159 if (_has_finalizer ||
4160 (super != NULL && super->has_finalizer())) {
4161 ik->set_has_finalizer();
4162 }
4163 }
4164
4165 #ifdef ASSERT
4166 bool f = false;
4167 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4168 vmSymbols::void_method_signature());
4169 if (m != NULL && !m->is_empty_method()) {
4170 f = true;
4171 }
4172
4173 // Spec doesn't prevent agent from redefinition of empty finalizer.
4174 // Despite the fact that it's generally bad idea and redefined finalizer
4175 // will not work as expected we shouldn't abort vm in this case
4176 if (!ik->has_redefined_this_or_super()) {
4177 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4178 }
4179 #endif
4180
4181 // Check if this klass supports the java.lang.Cloneable interface
4182 if (vmClasses::Cloneable_klass_loaded()) {
4183 if (ik->is_subtype_of(vmClasses::Cloneable_klass())) {
4184 ik->set_is_cloneable();
4185 }
4186 }
4187
4188 // Check if this klass has a vanilla default constructor
4189 if (super == NULL) {
4190 // java.lang.Object has empty default constructor
4191 ik->set_has_vanilla_constructor();
4192 } else {
4193 if (super->has_vanilla_constructor() &&
4194 _has_vanilla_constructor) {
4195 ik->set_has_vanilla_constructor();
4196 }
4197 #ifdef ASSERT
4198 bool v = false;
4199 if (super->has_vanilla_constructor()) {
4200 const Method* const constructor =
4201 ik->find_method(vmSymbols::object_initializer_name(),
4202 vmSymbols::void_method_signature());
4203 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4204 v = true;
4205 }
4206 }
4207 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4208 #endif
4209 }
4210
4211 // If it cannot be fast-path allocated, set a bit in the layout helper.
4212 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4213 assert(ik->size_helper() > 0, "layout_helper is initialized");
4214 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4215 || ik->is_abstract() || ik->is_interface()
4216 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4217 || ik->size_helper() >= FastAllocateSizeLimit) {
4218 // Forbid fast-path allocation.
4219 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4220 ik->set_layout_helper(lh);
4221 }
4222 }
4223
4224 // utility methods for appending an array with check for duplicates
4225
4226 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4227 const Array<InstanceKlass*>* const ifs) {
4228 // iterate over new interfaces
4229 for (int i = 0; i < ifs->length(); i++) {
4230 InstanceKlass* const e = ifs->at(i);
4231 assert(e->is_klass() && e->is_interface(), "just checking");
4232 // add new interface
4233 result->append_if_missing(e);
4234 }
4235 }
4236
4237 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4238 Array<InstanceKlass*>* local_ifs,
4239 ClassLoaderData* loader_data,
4240 TRAPS) {
4241 assert(local_ifs != NULL, "invariant");
4242 assert(loader_data != NULL, "invariant");
4243
4244 // Compute maximum size for transitive interfaces
4245 int max_transitive_size = 0;
4246 int super_size = 0;
4247 // Add superclass transitive interfaces size
4248 if (super != NULL) {
4249 super_size = super->transitive_interfaces()->length();
4250 max_transitive_size += super_size;
4251 }
4252 // Add local interfaces' super interfaces
4253 const int local_size = local_ifs->length();
4254 for (int i = 0; i < local_size; i++) {
4255 InstanceKlass* const l = local_ifs->at(i);
4256 max_transitive_size += l->transitive_interfaces()->length();
4257 }
4258 // Finally add local interfaces
4259 max_transitive_size += local_size;
4260 // Construct array
4261 if (max_transitive_size == 0) {
4262 // no interfaces, use canonicalized array
4263 return Universe::the_empty_instance_klass_array();
4264 } else if (max_transitive_size == super_size) {
4265 // no new local interfaces added, share superklass' transitive interface array
4266 return super->transitive_interfaces();
4267 } else if (max_transitive_size == local_size) {
4268 // only local interfaces added, share local interface array
4269 return local_ifs;
4270 } else {
4271 ResourceMark rm;
4272 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4273
4274 // Copy down from superclass
4275 if (super != NULL) {
4276 append_interfaces(result, super->transitive_interfaces());
4277 }
4278
4279 // Copy down from local interfaces' superinterfaces
4280 for (int i = 0; i < local_size; i++) {
4281 InstanceKlass* const l = local_ifs->at(i);
4282 append_interfaces(result, l->transitive_interfaces());
4283 }
4284 // Finally add local interfaces
4285 append_interfaces(result, local_ifs);
4286
4287 // length will be less than the max_transitive_size if duplicates were removed
4288 const int length = result->length();
4289 assert(length <= max_transitive_size, "just checking");
4290 Array<InstanceKlass*>* const new_result =
4291 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4292 for (int i = 0; i < length; i++) {
4293 InstanceKlass* const e = result->at(i);
4294 assert(e != NULL, "just checking");
4295 new_result->at_put(i, e);
4296 }
4297 return new_result;
4298 }
4299 }
4300
4301 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4302 assert(this_klass != NULL, "invariant");
4303 const Klass* const super = this_klass->super();
4304
4305 if (super != NULL) {
4306 const InstanceKlass* super_ik = InstanceKlass::cast(super);
4307
4308 if (super->is_final()) {
4309 classfile_icce_error("class %s cannot inherit from final class %s", super_ik, THREAD);
4310 return;
4311 }
4312
4313 if (super_ik->is_sealed() && !super_ik->has_as_permitted_subclass(this_klass)) {
4314 classfile_icce_error("class %s cannot inherit from sealed class %s", super_ik, THREAD);
4315 return;
4316 }
4317
4318 // If the loader is not the boot loader then throw an exception if its
4319 // superclass is in package jdk.internal.reflect and its loader is not a
4320 // special reflection class loader
4321 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4322 PackageEntry* super_package = super->package();
4323 if (super_package != NULL &&
4324 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4325 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4326 ResourceMark rm(THREAD);
4327 Exceptions::fthrow(
4328 THREAD_AND_LOCATION,
4329 vmSymbols::java_lang_IllegalAccessError(),
4330 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4331 this_klass->external_name(),
4332 this_klass->class_loader_data()->loader_name_and_id(),
4333 super->external_name());
4334 return;
4335 }
4336 }
4337
4338 Reflection::VerifyClassAccessResults vca_result =
4339 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4340 if (vca_result != Reflection::ACCESS_OK) {
4341 ResourceMark rm(THREAD);
4342 char* msg = Reflection::verify_class_access_msg(this_klass,
4343 InstanceKlass::cast(super),
4344 vca_result);
4345 if (msg == NULL) {
4346 bool same_module = (this_klass->module() == super->module());
4347 Exceptions::fthrow(
4348 THREAD_AND_LOCATION,
4349 vmSymbols::java_lang_IllegalAccessError(),
4350 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4351 this_klass->external_name(),
4352 super->is_abstract() ? "abstract " : "",
4353 super->external_name(),
4354 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4355 (same_module) ? "" : "; ",
4356 (same_module) ? "" : super->class_in_module_of_loader());
4357 } else {
4358 // Add additional message content.
4359 Exceptions::fthrow(
4360 THREAD_AND_LOCATION,
4361 vmSymbols::java_lang_IllegalAccessError(),
4362 "superclass access check failed: %s",
4363 msg);
4364 }
4365 }
4366 }
4367 }
4368
4369
4370 void ClassFileParser::check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4371 assert(this_klass != NULL, "invariant");
4372 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4373 const int lng = local_interfaces->length();
4374 for (int i = lng - 1; i >= 0; i--) {
4375 InstanceKlass* const k = local_interfaces->at(i);
4376 assert (k != NULL && k->is_interface(), "invalid interface");
4377
4378 if (k->is_sealed() && !k->has_as_permitted_subclass(this_klass)) {
4379 classfile_icce_error(this_klass->is_interface() ?
4380 "class %s cannot extend sealed interface %s" :
4381 "class %s cannot implement sealed interface %s",
4382 k, THREAD);
4383 return;
4384 }
4385
4386 Reflection::VerifyClassAccessResults vca_result =
4387 Reflection::verify_class_access(this_klass, k, false);
4388 if (vca_result != Reflection::ACCESS_OK) {
4389 ResourceMark rm(THREAD);
4390 char* msg = Reflection::verify_class_access_msg(this_klass,
4391 k,
4392 vca_result);
4393 if (msg == NULL) {
4394 bool same_module = (this_klass->module() == k->module());
4395 Exceptions::fthrow(
4396 THREAD_AND_LOCATION,
4397 vmSymbols::java_lang_IllegalAccessError(),
4398 "class %s cannot access its superinterface %s (%s%s%s)",
4399 this_klass->external_name(),
4400 k->external_name(),
4401 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4402 (same_module) ? "" : "; ",
4403 (same_module) ? "" : k->class_in_module_of_loader());
4404 } else {
4405 // Add additional message content.
4406 Exceptions::fthrow(
4407 THREAD_AND_LOCATION,
4408 vmSymbols::java_lang_IllegalAccessError(),
4409 "superinterface check failed: %s",
4410 msg);
4411 }
4412 }
4413 }
4414 }
4415
4416
4417 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4418 assert(this_klass != NULL, "invariant");
4419 const Array<Method*>* const methods = this_klass->methods();
4420 const int num_methods = methods->length();
4421
4422 // go thru each method and check if it overrides a final method
4423 for (int index = 0; index < num_methods; index++) {
4424 const Method* const m = methods->at(index);
4425
4426 // skip private, static, and <init> methods
4427 if ((!m->is_private() && !m->is_static()) &&
4428 (m->name() != vmSymbols::object_initializer_name())) {
4429
4430 const Symbol* const name = m->name();
4431 const Symbol* const signature = m->signature();
4432 const Klass* k = this_klass->super();
4433 const Method* super_m = NULL;
4434 while (k != NULL) {
4435 // skip supers that don't have final methods.
4436 if (k->has_final_method()) {
4437 // lookup a matching method in the super class hierarchy
4438 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4439 if (super_m == NULL) {
4440 break; // didn't find any match; get out
4441 }
4442
4443 if (super_m->is_final() && !super_m->is_static() &&
4444 !super_m->access_flags().is_private()) {
4445 // matching method in super is final, and not static or private
4446 bool can_access = Reflection::verify_member_access(this_klass,
4447 super_m->method_holder(),
4448 super_m->method_holder(),
4449 super_m->access_flags(),
4450 false, false, CHECK);
4451 if (can_access) {
4452 // this class can access super final method and therefore override
4453 ResourceMark rm(THREAD);
4454 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
4455 err_msg("class %s overrides final method %s.%s%s",
4456 this_klass->external_name(),
4457 super_m->method_holder()->external_name(),
4458 name->as_C_string(),
4459 signature->as_C_string()));
4460 }
4461 }
4462
4463 // continue to look from super_m's holder's super.
4464 k = super_m->method_holder()->super();
4465 continue;
4466 }
4467
4468 k = k->super();
4469 }
4470 }
4471 }
4472 }
4473
4474
4475 // assumes that this_klass is an interface
4476 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4477 assert(this_klass != NULL, "invariant");
4478 assert(this_klass->is_interface(), "not an interface");
4479 const Array<Method*>* methods = this_klass->methods();
4480 const int num_methods = methods->length();
4481
4482 for (int index = 0; index < num_methods; index++) {
4483 const Method* const m = methods->at(index);
4484 // if m is static and not the init method, throw a verify error
4485 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4486 ResourceMark rm(THREAD);
4487 Exceptions::fthrow(
4488 THREAD_AND_LOCATION,
4489 vmSymbols::java_lang_VerifyError(),
4490 "Illegal static method %s in interface %s",
4491 m->name()->as_C_string(),
4492 this_klass->external_name()
4493 );
4494 return;
4495 }
4496 }
4497 }
4498
4499 // utility methods for format checking
4500
4501 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4502 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4503 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4504 if (is_module) {
4505 ResourceMark rm(THREAD);
4506 Exceptions::fthrow(
4507 THREAD_AND_LOCATION,
4508 vmSymbols::java_lang_NoClassDefFoundError(),
4509 "%s is not a class because access_flag ACC_MODULE is set",
4510 _class_name->as_C_string());
4511 return;
4512 }
4513
4514 if (!_need_verify) { return; }
4515
4516 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4517 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4518 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4519 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4520 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4521 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4522 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4523 const bool major_gte_14 = _major_version >= JAVA_14_VERSION;
4524
4525 if ((is_abstract && is_final) ||
4526 (is_interface && !is_abstract) ||
4527 (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4528 (!is_interface && major_gte_1_5 && is_annotation)) {
4529 ResourceMark rm(THREAD);
4530 Exceptions::fthrow(
4531 THREAD_AND_LOCATION,
4532 vmSymbols::java_lang_ClassFormatError(),
4533 "Illegal class modifiers in class %s: 0x%X",
4534 _class_name->as_C_string(), flags
4535 );
4536 return;
4537 }
4538 }
4539
4540 static bool has_illegal_visibility(jint flags) {
4541 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4542 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4543 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4544
4545 return ((is_public && is_protected) ||
4546 (is_public && is_private) ||
4547 (is_protected && is_private));
4548 }
4549
4550 // A legal major_version.minor_version must be one of the following:
4551 //
4552 // Major_version >= 45 and major_version < 56, any minor_version.
4553 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4554 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4555 //
4556 void ClassFileParser::verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4557 ResourceMark rm(THREAD);
4558 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4559 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4560 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid major version",
4561 class_name, major, minor, THREAD);
4562 return;
4563 }
4564
4565 if (major > max_version) {
4566 Exceptions::fthrow(
4567 THREAD_AND_LOCATION,
4568 vmSymbols::java_lang_UnsupportedClassVersionError(),
4569 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4570 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4571 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4572 return;
4573 }
4574
4575 if (major < JAVA_12_VERSION || minor == 0) {
4576 return;
4577 }
4578
4579 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4580 if (major != max_version) {
4581 Exceptions::fthrow(
4582 THREAD_AND_LOCATION,
4583 vmSymbols::java_lang_UnsupportedClassVersionError(),
4584 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4585 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4586 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4587 return;
4588 }
4589
4590 if (!Arguments::enable_preview()) {
4591 classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4592 class_name, major, minor, THREAD);
4593 return;
4594 }
4595
4596 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4597 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4598 class_name, major, minor, THREAD);
4599 }
4600 }
4601
4602 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4603 bool is_interface,
4604 TRAPS) const {
4605 if (!_need_verify) { return; }
4606
4607 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4608 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4609 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4610 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4611 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4612 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4613 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4614 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4615 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4616
4617 bool is_illegal = false;
4618
4619 if (is_interface) {
4620 if (!is_public || !is_static || !is_final || is_private ||
4621 is_protected || is_volatile || is_transient ||
4622 (major_gte_1_5 && is_enum)) {
4623 is_illegal = true;
4624 }
4625 } else { // not interface
4626 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4627 is_illegal = true;
4628 }
4629 }
4630
4631 if (is_illegal) {
4632 ResourceMark rm(THREAD);
4633 Exceptions::fthrow(
4634 THREAD_AND_LOCATION,
4635 vmSymbols::java_lang_ClassFormatError(),
4636 "Illegal field modifiers in class %s: 0x%X",
4637 _class_name->as_C_string(), flags);
4638 return;
4639 }
4640 }
4641
4642 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4643 bool is_interface,
4644 const Symbol* name,
4645 TRAPS) const {
4646 if (!_need_verify) { return; }
4647
4648 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4649 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4650 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4651 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4652 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4653 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4654 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4655 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4656 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4657 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4658 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4659 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4660 const bool major_gte_17 = _major_version >= JAVA_17_VERSION;
4661 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4662
4663 bool is_illegal = false;
4664
4665 if (is_interface) {
4666 if (major_gte_8) {
4667 // Class file version is JAVA_8_VERSION or later Methods of
4668 // interfaces may set any of the flags except ACC_PROTECTED,
4669 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4670 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4671 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4672 (is_native || is_protected || is_final || is_synchronized) ||
4673 // If a specific method of a class or interface has its
4674 // ACC_ABSTRACT flag set, it must not have any of its
4675 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4676 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4677 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4678 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4679 (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
4680 is_illegal = true;
4681 }
4682 } else if (major_gte_1_5) {
4683 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4684 if (!is_public || is_private || is_protected || is_static || is_final ||
4685 is_synchronized || is_native || !is_abstract || is_strict) {
4686 is_illegal = true;
4687 }
4688 } else {
4689 // Class file version is pre-JAVA_1_5_VERSION
4690 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4691 is_illegal = true;
4692 }
4693 }
4694 } else { // not interface
4695 if (has_illegal_visibility(flags)) {
4696 is_illegal = true;
4697 } else {
4698 if (is_initializer) {
4699 if (is_static || is_final || is_synchronized || is_native ||
4700 is_abstract || (major_gte_1_5 && is_bridge)) {
4701 is_illegal = true;
4702 }
4703 } else { // not initializer
4704 if (is_abstract) {
4705 if ((is_final || is_native || is_private || is_static ||
4706 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
4707 is_illegal = true;
4708 }
4709 }
4710 }
4711 }
4712 }
4713
4714 if (is_illegal) {
4715 ResourceMark rm(THREAD);
4716 Exceptions::fthrow(
4717 THREAD_AND_LOCATION,
4718 vmSymbols::java_lang_ClassFormatError(),
4719 "Method %s in class %s has illegal modifiers: 0x%X",
4720 name->as_C_string(), _class_name->as_C_string(), flags);
4721 return;
4722 }
4723 }
4724
4725 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4726 int length,
4727 TRAPS) const {
4728 assert(_need_verify, "only called when _need_verify is true");
4729 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4730 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
4731 }
4732 }
4733
4734 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4735 // In class names, '/' separates unqualified names. This is verified in this function also.
4736 // Method names also may not contain the characters '<' or '>', unless <init>
4737 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4738 // method. Because these names have been checked as special cases before
4739 // calling this method in verify_legal_method_name.
4740 //
4741 // This method is also called from the modular system APIs in modules.cpp
4742 // to verify the validity of module and package names.
4743 bool ClassFileParser::verify_unqualified_name(const char* name,
4744 unsigned int length,
4745 int type) {
4746 if (length == 0) return false; // Must have at least one char.
4747 for (const char* p = name; p != name + length; p++) {
4748 switch(*p) {
4749 case JVM_SIGNATURE_DOT:
4750 case JVM_SIGNATURE_ENDCLASS:
4751 case JVM_SIGNATURE_ARRAY:
4752 // do not permit '.', ';', or '['
4753 return false;
4754 case JVM_SIGNATURE_SLASH:
4755 // check for '//' or leading or trailing '/' which are not legal
4756 // unqualified name must not be empty
4757 if (type == ClassFileParser::LegalClass) {
4758 if (p == name || p+1 >= name+length ||
4759 *(p+1) == JVM_SIGNATURE_SLASH) {
4760 return false;
4761 }
4762 } else {
4763 return false; // do not permit '/' unless it's class name
4764 }
4765 break;
4766 case JVM_SIGNATURE_SPECIAL:
4767 case JVM_SIGNATURE_ENDSPECIAL:
4768 // do not permit '<' or '>' in method names
4769 if (type == ClassFileParser::LegalMethod) {
4770 return false;
4771 }
4772 }
4773 }
4774 return true;
4775 }
4776
4777 // Take pointer to a UTF8 byte string (not NUL-terminated).
4778 // Skip over the longest part of the string that could
4779 // be taken as a fieldname. Allow '/' if slash_ok is true.
4780 // Return a pointer to just past the fieldname.
4781 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4782 // being true, we saw consecutive slashes (meaning we were looking for a
4783 // qualified path but found something that was badly-formed).
4784 static const char* skip_over_field_name(const char* const name,
4785 bool slash_ok,
4786 unsigned int length) {
4787 const char* p;
4788 jboolean last_is_slash = false;
4789 jboolean not_first_ch = false;
4790
4791 for (p = name; p != name + length; not_first_ch = true) {
4792 const char* old_p = p;
4793 jchar ch = *p;
4794 if (ch < 128) {
4795 p++;
4796 // quick check for ascii
4797 if ((ch >= 'a' && ch <= 'z') ||
4798 (ch >= 'A' && ch <= 'Z') ||
4799 (ch == '_' || ch == '$') ||
4800 (not_first_ch && ch >= '0' && ch <= '9')) {
4801 last_is_slash = false;
4802 continue;
4803 }
4804 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
4805 if (last_is_slash) {
4806 return NULL; // Don't permit consecutive slashes
4807 }
4808 last_is_slash = true;
4809 continue;
4810 }
4811 }
4812 else {
4813 jint unicode_ch;
4814 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4815 p = tmp_p;
4816 last_is_slash = false;
4817 // Check if ch is Java identifier start or is Java identifier part
4818 // 4672820: call java.lang.Character methods directly without generating separate tables.
4819 EXCEPTION_MARK;
4820 // return value
4821 JavaValue result(T_BOOLEAN);
4822 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
4823 JavaCallArguments args;
4824 args.push_int(unicode_ch);
4825
4826 if (not_first_ch) {
4827 // public static boolean isJavaIdentifierPart(char ch);
4828 JavaCalls::call_static(&result,
4829 vmClasses::Character_klass(),
4830 vmSymbols::isJavaIdentifierPart_name(),
4831 vmSymbols::int_bool_signature(),
4832 &args,
4833 THREAD);
4834 } else {
4835 // public static boolean isJavaIdentifierStart(char ch);
4836 JavaCalls::call_static(&result,
4837 vmClasses::Character_klass(),
4838 vmSymbols::isJavaIdentifierStart_name(),
4839 vmSymbols::int_bool_signature(),
4840 &args,
4841 THREAD);
4842 }
4843 if (HAS_PENDING_EXCEPTION) {
4844 CLEAR_PENDING_EXCEPTION;
4845 return NULL;
4846 }
4847 if(result.get_jboolean()) {
4848 continue;
4849 }
4850 }
4851 return (not_first_ch) ? old_p : NULL;
4852 }
4853 return (not_first_ch) ? p : NULL;
4854 }
4855
4856 // Take pointer to a UTF8 byte string (not NUL-terminated).
4857 // Skip over the longest part of the string that could
4858 // be taken as a field signature. Allow "void" if void_ok.
4859 // Return a pointer to just past the signature.
4860 // Return NULL if no legal signature is found.
4861 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4862 bool void_ok,
4863 unsigned int length,
4864 TRAPS) const {
4865 unsigned int array_dim = 0;
4866 while (length > 0) {
4867 switch (signature[0]) {
4868 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4869 case JVM_SIGNATURE_BOOLEAN:
4870 case JVM_SIGNATURE_BYTE:
4871 case JVM_SIGNATURE_CHAR:
4872 case JVM_SIGNATURE_SHORT:
4873 case JVM_SIGNATURE_INT:
4874 case JVM_SIGNATURE_FLOAT:
4875 case JVM_SIGNATURE_LONG:
4876 case JVM_SIGNATURE_DOUBLE:
4877 return signature + 1;
4878 case JVM_SIGNATURE_CLASS: {
4879 if (_major_version < JAVA_1_5_VERSION) {
4880 // Skip over the class name if one is there
4881 const char* const p = skip_over_field_name(signature + 1, true, --length);
4882
4883 // The next character better be a semicolon
4884 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
4885 return p + 1;
4886 }
4887 }
4888 else {
4889 // Skip leading 'L' and ignore first appearance of ';'
4890 signature++;
4891 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
4892 // Format check signature
4893 if (c != NULL) {
4894 int newlen = c - (char*) signature;
4895 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
4896 if (!legal) {
4897 classfile_parse_error("Class name is empty or contains illegal character "
4898 "in descriptor in class file %s",
4899 THREAD);
4900 return NULL;
4901 }
4902 return signature + newlen + 1;
4903 }
4904 }
4905 return NULL;
4906 }
4907 case JVM_SIGNATURE_ARRAY:
4908 array_dim++;
4909 if (array_dim > 255) {
4910 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4911 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", THREAD);
4912 return NULL;
4913 }
4914 // The rest of what's there better be a legal signature
4915 signature++;
4916 length--;
4917 void_ok = false;
4918 break;
4919 default:
4920 return NULL;
4921 }
4922 }
4923 return NULL;
4924 }
4925
4926 // Checks if name is a legal class name.
4927 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4928 if (!_need_verify || _relax_verify) { return; }
4929
4930 assert(name->refcount() > 0, "symbol must be kept alive");
4931 char* bytes = (char*)name->bytes();
4932 unsigned int length = name->utf8_length();
4933 bool legal = false;
4934
4935 if (length > 0) {
4936 const char* p;
4937 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4938 p = skip_over_field_signature(bytes, false, length, CHECK);
4939 legal = (p != NULL) && ((p - bytes) == (int)length);
4940 } else if (_major_version < JAVA_1_5_VERSION) {
4941 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4942 p = skip_over_field_name(bytes, true, length);
4943 legal = (p != NULL) && ((p - bytes) == (int)length);
4944 }
4945 } else {
4946 // 4900761: relax the constraints based on JSR202 spec
4947 // Class names may be drawn from the entire Unicode character set.
4948 // Identifiers between '/' must be unqualified names.
4949 // The utf8 string has been verified when parsing cpool entries.
4950 legal = verify_unqualified_name(bytes, length, LegalClass);
4951 }
4952 }
4953 if (!legal) {
4954 ResourceMark rm(THREAD);
4955 assert(_class_name != NULL, "invariant");
4956 Exceptions::fthrow(
4957 THREAD_AND_LOCATION,
4958 vmSymbols::java_lang_ClassFormatError(),
4959 "Illegal class name \"%.*s\" in class file %s", length, bytes,
4960 _class_name->as_C_string()
4961 );
4962 return;
4963 }
4964 }
4965
4966 // Checks if name is a legal field name.
4967 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4968 if (!_need_verify || _relax_verify) { return; }
4969
4970 char* bytes = (char*)name->bytes();
4971 unsigned int length = name->utf8_length();
4972 bool legal = false;
4973
4974 if (length > 0) {
4975 if (_major_version < JAVA_1_5_VERSION) {
4976 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4977 const char* p = skip_over_field_name(bytes, false, length);
4978 legal = (p != NULL) && ((p - bytes) == (int)length);
4979 }
4980 } else {
4981 // 4881221: relax the constraints based on JSR202 spec
4982 legal = verify_unqualified_name(bytes, length, LegalField);
4983 }
4984 }
4985
4986 if (!legal) {
4987 ResourceMark rm(THREAD);
4988 assert(_class_name != NULL, "invariant");
4989 Exceptions::fthrow(
4990 THREAD_AND_LOCATION,
4991 vmSymbols::java_lang_ClassFormatError(),
4992 "Illegal field name \"%.*s\" in class %s", length, bytes,
4993 _class_name->as_C_string()
4994 );
4995 return;
4996 }
4997 }
4998
4999 // Checks if name is a legal method name.
5000 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5001 if (!_need_verify || _relax_verify) { return; }
5002
5003 assert(name != NULL, "method name is null");
5004 char* bytes = (char*)name->bytes();
5005 unsigned int length = name->utf8_length();
5006 bool legal = false;
5007
5008 if (length > 0) {
5009 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
5010 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5011 legal = true;
5012 }
5013 } else if (_major_version < JAVA_1_5_VERSION) {
5014 const char* p;
5015 p = skip_over_field_name(bytes, false, length);
5016 legal = (p != NULL) && ((p - bytes) == (int)length);
5017 } else {
5018 // 4881221: relax the constraints based on JSR202 spec
5019 legal = verify_unqualified_name(bytes, length, LegalMethod);
5020 }
5021 }
5022
5023 if (!legal) {
5024 ResourceMark rm(THREAD);
5025 assert(_class_name != NULL, "invariant");
5026 Exceptions::fthrow(
5027 THREAD_AND_LOCATION,
5028 vmSymbols::java_lang_ClassFormatError(),
5029 "Illegal method name \"%.*s\" in class %s", length, bytes,
5030 _class_name->as_C_string()
5031 );
5032 return;
5033 }
5034 }
5035
5036
5037 // Checks if signature is a legal field signature.
5038 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5039 const Symbol* signature,
5040 TRAPS) const {
5041 if (!_need_verify) { return; }
5042
5043 const char* const bytes = (const char* const)signature->bytes();
5044 const unsigned int length = signature->utf8_length();
5045 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5046
5047 if (p == NULL || (p - bytes) != (int)length) {
5048 throwIllegalSignature("Field", name, signature, CHECK);
5049 }
5050 }
5051
5052 // Checks if signature is a legal method signature.
5053 // Returns number of parameters
5054 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5055 const Symbol* signature,
5056 TRAPS) const {
5057 if (!_need_verify) {
5058 // make sure caller's args_size will be less than 0 even for non-static
5059 // method so it will be recomputed in compute_size_of_parameters().
5060 return -2;
5061 }
5062
5063 // Class initializers cannot have args for class format version >= 51.
5064 if (name == vmSymbols::class_initializer_name() &&
5065 signature != vmSymbols::void_method_signature() &&
5066 _major_version >= JAVA_7_VERSION) {
5067 throwIllegalSignature("Method", name, signature, CHECK_0);
5068 return 0;
5069 }
5070
5071 unsigned int args_size = 0;
5072 const char* p = (const char*)signature->bytes();
5073 unsigned int length = signature->utf8_length();
5074 const char* nextp;
5075
5076 // The first character must be a '('
5077 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5078 length--;
5079 // Skip over legal field signatures
5080 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5081 while ((length > 0) && (nextp != NULL)) {
5082 args_size++;
5083 if (p[0] == 'J' || p[0] == 'D') {
5084 args_size++;
5085 }
5086 length -= nextp - p;
5087 p = nextp;
5088 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5089 }
5090 // The first non-signature thing better be a ')'
5091 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5092 length--;
5093 if (name->utf8_length() > 0 && name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
5094 // All internal methods must return void
5095 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5096 return args_size;
5097 }
5098 } else {
5099 // Now we better just have a return value
5100 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5101 if (nextp && ((int)length == (nextp - p))) {
5102 return args_size;
5103 }
5104 }
5105 }
5106 }
5107 // Report error
5108 throwIllegalSignature("Method", name, signature, CHECK_0);
5109 return 0;
5110 }
5111
5112 int ClassFileParser::static_field_size() const {
5113 assert(_field_info != NULL, "invariant");
5114 return _field_info->_static_field_size;
5115 }
5116
5117 int ClassFileParser::total_oop_map_count() const {
5118 assert(_field_info != NULL, "invariant");
5119 return _field_info->oop_map_blocks->_nonstatic_oop_map_count;
5120 }
5121
5122 jint ClassFileParser::layout_size() const {
5123 assert(_field_info != NULL, "invariant");
5124 return _field_info->_instance_size;
5125 }
5126
5127 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5128 const Array<Method*>* methods) {
5129 assert(ik != NULL, "invariant");
5130 assert(methods != NULL, "invariant");
5131
5132 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5133 // (We used to do this lazily, but now we query it in Rewriter,
5134 // which is eagerly done for every method, so we might as well do it now,
5135 // when everything is fresh in memory.)
5136 const vmSymbolID klass_id = Method::klass_id_for_intrinsics(ik);
5137
5138 if (klass_id != vmSymbolID::NO_SID) {
5139 for (int j = 0; j < methods->length(); ++j) {
5140 Method* method = methods->at(j);
5141 method->init_intrinsic_id(klass_id);
5142
5143 if (CheckIntrinsics) {
5144 // Check if an intrinsic is defined for method 'method',
5145 // but the method is not annotated with @IntrinsicCandidate.
5146 if (method->intrinsic_id() != vmIntrinsics::_none &&
5147 !method->intrinsic_candidate()) {
5148 tty->print("Compiler intrinsic is defined for method [%s], "
5149 "but the method is not annotated with @IntrinsicCandidate.%s",
5150 method->name_and_sig_as_C_string(),
5151 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5152 );
5153 tty->cr();
5154 DEBUG_ONLY(vm_exit(1));
5155 }
5156 // Check is the method 'method' is annotated with @IntrinsicCandidate,
5157 // but there is no intrinsic available for it.
5158 if (method->intrinsic_candidate() &&
5159 method->intrinsic_id() == vmIntrinsics::_none) {
5160 tty->print("Method [%s] is annotated with @IntrinsicCandidate, "
5161 "but no compiler intrinsic is defined for the method.%s",
5162 method->name_and_sig_as_C_string(),
5163 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5164 );
5165 tty->cr();
5166 DEBUG_ONLY(vm_exit(1));
5167 }
5168 }
5169 } // end for
5170
5171 #ifdef ASSERT
5172 if (CheckIntrinsics) {
5173 // Check for orphan methods in the current class. A method m
5174 // of a class C is orphan if an intrinsic is defined for method m,
5175 // but class C does not declare m.
5176 // The check is potentially expensive, therefore it is available
5177 // only in debug builds.
5178
5179 for (auto id : EnumRange<vmIntrinsicID>{}) {
5180 if (vmIntrinsics::_compiledLambdaForm == id) {
5181 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5182 // generated for the JVM from a LambdaForm and therefore no method
5183 // is defined for it.
5184 continue;
5185 }
5186 if (vmIntrinsics::_blackhole == id) {
5187 // The _blackhole intrinsic is a special marker. No explicit method
5188 // is defined for it.
5189 continue;
5190 }
5191
5192 if (vmIntrinsics::class_for(id) == klass_id) {
5193 // Check if the current class contains a method with the same
5194 // name, flags, signature.
5195 bool match = false;
5196 for (int j = 0; j < methods->length(); ++j) {
5197 const Method* method = methods->at(j);
5198 if (method->intrinsic_id() == id) {
5199 match = true;
5200 break;
5201 }
5202 }
5203
5204 if (!match) {
5205 char buf[1000];
5206 tty->print("Compiler intrinsic is defined for method [%s], "
5207 "but the method is not available in class [%s].%s",
5208 vmIntrinsics::short_name_as_C_string(id, buf, sizeof(buf)),
5209 ik->name()->as_C_string(),
5210 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5211 );
5212 tty->cr();
5213 DEBUG_ONLY(vm_exit(1));
5214 }
5215 }
5216 } // end for
5217 } // CheckIntrinsics
5218 #endif // ASSERT
5219 }
5220 }
5221
5222 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
5223 const ClassInstanceInfo& cl_inst_info,
5224 TRAPS) {
5225 if (_klass != NULL) {
5226 return _klass;
5227 }
5228
5229 InstanceKlass* const ik =
5230 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5231
5232 if (is_hidden()) {
5233 mangle_hidden_class_name(ik);
5234 }
5235
5236 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5237
5238 assert(_klass == ik, "invariant");
5239
5240 return ik;
5241 }
5242
5243 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5244 bool changed_by_loadhook,
5245 const ClassInstanceInfo& cl_inst_info,
5246 TRAPS) {
5247 assert(ik != NULL, "invariant");
5248
5249 // Set name and CLD before adding to CLD
5250 ik->set_class_loader_data(_loader_data);
5251 ik->set_name(_class_name);
5252
5253 // Add all classes to our internal class loader list here,
5254 // including classes in the bootstrap (NULL) class loader.
5255 const bool publicize = !is_internal();
5256
5257 _loader_data->add_class(ik, publicize);
5258
5259 set_klass_to_deallocate(ik);
5260
5261 assert(_field_info != NULL, "invariant");
5262 assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5263 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5264 "sanity");
5265
5266 assert(ik->is_instance_klass(), "sanity");
5267 assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5268
5269 // Fill in information already parsed
5270 ik->set_should_verify_class(_need_verify);
5271
5272 // Not yet: supers are done below to support the new subtype-checking fields
5273 ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5274 ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
5275 assert(_fac != NULL, "invariant");
5276 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5277
5278 // this transfers ownership of a lot of arrays from
5279 // the parser onto the InstanceKlass*
5280 apply_parsed_class_metadata(ik, _java_fields_count);
5281
5282 // can only set dynamic nest-host after static nest information is set
5283 if (cl_inst_info.dynamic_nest_host() != NULL) {
5284 ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5285 }
5286
5287 // note that is not safe to use the fields in the parser from this point on
5288 assert(NULL == _cp, "invariant");
5289 assert(NULL == _fields, "invariant");
5290 assert(NULL == _methods, "invariant");
5291 assert(NULL == _inner_classes, "invariant");
5292 assert(NULL == _nest_members, "invariant");
5293 assert(NULL == _combined_annotations, "invariant");
5294 assert(NULL == _record_components, "invariant");
5295 assert(NULL == _permitted_subclasses, "invariant");
5296
5297 if (_has_final_method) {
5298 ik->set_has_final_method();
5299 }
5300
5301 ik->copy_method_ordering(_method_ordering, CHECK);
5302 // The InstanceKlass::_methods_jmethod_ids cache
5303 // is managed on the assumption that the initial cache
5304 // size is equal to the number of methods in the class. If
5305 // that changes, then InstanceKlass::idnum_can_increment()
5306 // has to be changed accordingly.
5307 ik->set_initial_method_idnum(ik->methods()->length());
5308
5309 ik->set_this_class_index(_this_class_index);
5310
5311 if (_is_hidden) {
5312 // _this_class_index is a CONSTANT_Class entry that refers to this
5313 // hidden class itself. If this class needs to refer to its own methods
5314 // or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5315 // _this_class_index. However, because this class is hidden (it's
5316 // not stored in SystemDictionary), _this_class_index cannot be resolved
5317 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5318 // Therefore, we must eagerly resolve _this_class_index now.
5319 ik->constants()->klass_at_put(_this_class_index, ik);
5320 }
5321
5322 ik->set_minor_version(_minor_version);
5323 ik->set_major_version(_major_version);
5324 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5325 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5326
5327 if (_is_hidden) {
5328 ik->set_is_hidden();
5329 }
5330
5331 // Set PackageEntry for this_klass
5332 oop cl = ik->class_loader();
5333 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5334 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5335 ik->set_package(cld, NULL, CHECK);
5336
5337 const Array<Method*>* const methods = ik->methods();
5338 assert(methods != NULL, "invariant");
5339 const int methods_len = methods->length();
5340
5341 check_methods_for_intrinsics(ik, methods);
5342
5343 // Fill in field values obtained by parse_classfile_attributes
5344 if (_parsed_annotations->has_any_annotations()) {
5345 _parsed_annotations->apply_to(ik);
5346 }
5347
5348 apply_parsed_class_attributes(ik);
5349
5350 // Miranda methods
5351 if ((_num_miranda_methods > 0) ||
5352 // if this class introduced new miranda methods or
5353 (_super_klass != NULL && _super_klass->has_miranda_methods())
5354 // super class exists and this class inherited miranda methods
5355 ) {
5356 ik->set_has_miranda_methods(); // then set a flag
5357 }
5358
5359 // Fill in information needed to compute superclasses.
5360 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5361 ik->set_transitive_interfaces(_transitive_interfaces);
5362 ik->set_local_interfaces(_local_interfaces);
5363 _transitive_interfaces = NULL;
5364 _local_interfaces = NULL;
5365
5366 // Initialize itable offset tables
5367 klassItable::setup_itable_offset_table(ik);
5368
5369 // Compute transitive closure of interfaces this class implements
5370 // Do final class setup
5371 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5372 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5373 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5374 }
5375
5376 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5377 ( _super_klass != NULL && _super_klass->has_contended_annotations())) {
5378 ik->set_has_contended_annotations(true);
5379 }
5380
5381 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5382 set_precomputed_flags(ik);
5383
5384 // check if this class can access its super class
5385 check_super_class_access(ik, CHECK);
5386
5387 // check if this class can access its superinterfaces
5388 check_super_interface_access(ik, CHECK);
5389
5390 // check if this class overrides any final method
5391 check_final_method_override(ik, CHECK);
5392
5393 // reject static interface methods prior to Java 8
5394 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5395 check_illegal_static_method(ik, CHECK);
5396 }
5397
5398 // Obtain this_klass' module entry
5399 ModuleEntry* module_entry = ik->module();
5400 assert(module_entry != NULL, "module_entry should always be set");
5401
5402 // Obtain java.lang.Module
5403 Handle module_handle(THREAD, module_entry->module());
5404
5405 // Allocate mirror and initialize static fields
5406 // The create_mirror() call will also call compute_modifiers()
5407 java_lang_Class::create_mirror(ik,
5408 Handle(THREAD, _loader_data->class_loader()),
5409 module_handle,
5410 _protection_domain,
5411 cl_inst_info.class_data(),
5412 CHECK);
5413
5414 assert(_all_mirandas != NULL, "invariant");
5415
5416 // Generate any default methods - default methods are public interface methods
5417 // that have a default implementation. This is new with Java 8.
5418 if (_has_nonstatic_concrete_methods) {
5419 DefaultMethods::generate_default_methods(ik,
5420 _all_mirandas,
5421 CHECK);
5422 }
5423
5424 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5425 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5426 !module_entry->has_default_read_edges()) {
5427 if (!module_entry->set_has_default_read_edges()) {
5428 // We won a potential race
5429 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5430 }
5431 }
5432
5433 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5434
5435 if (!is_internal()) {
5436 ik->print_class_load_logging(_loader_data, module_entry, _stream);
5437
5438 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5439 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5440 log_is_enabled(Info, class, preview)) {
5441 ResourceMark rm;
5442 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5443 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5444 }
5445
5446 if (log_is_enabled(Debug, class, resolve)) {
5447 ResourceMark rm;
5448 // print out the superclass.
5449 const char * from = ik->external_name();
5450 if (ik->java_super() != NULL) {
5451 log_debug(class, resolve)("%s %s (super)",
5452 from,
5453 ik->java_super()->external_name());
5454 }
5455 // print out each of the interface classes referred to by this class.
5456 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5457 if (local_interfaces != NULL) {
5458 const int length = local_interfaces->length();
5459 for (int i = 0; i < length; i++) {
5460 const InstanceKlass* const k = local_interfaces->at(i);
5461 const char * to = k->external_name();
5462 log_debug(class, resolve)("%s %s (interface)", from, to);
5463 }
5464 }
5465 }
5466 }
5467
5468 JFR_ONLY(INIT_ID(ik);)
5469
5470 // If we reach here, all is well.
5471 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5472 // in order for it to not be destroyed in the ClassFileParser destructor.
5473 set_klass_to_deallocate(NULL);
5474
5475 // it's official
5476 set_klass(ik);
5477
5478 debug_only(ik->verify();)
5479 }
5480
5481 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5482 // Decrement the refcount in the old name, since we're clobbering it.
5483 _class_name->decrement_refcount();
5484
5485 _class_name = new_class_name;
5486 // Increment the refcount of the new name.
5487 // Now the ClassFileParser owns this name and will decrement in
5488 // the destructor.
5489 _class_name->increment_refcount();
5490 }
5491
5492 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5493 bool trusted = loader_data->is_boot_class_loader_data() ||
5494 loader_data->is_platform_class_loader_data();
5495 bool need_verify =
5496 // verifyAll
5497 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5498 // verifyRemote
5499 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5500 return !need_verify;
5501 }
5502
5503 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5504 Symbol* name,
5505 ClassLoaderData* loader_data,
5506 const ClassLoadInfo* cl_info,
5507 Publicity pub_level,
5508 TRAPS) :
5509 _stream(stream),
5510 _class_name(NULL),
5511 _loader_data(loader_data),
5512 _is_hidden(cl_info->is_hidden()),
5513 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5514 _orig_cp_size(0),
5515 _super_klass(),
5516 _cp(NULL),
5517 _fields(NULL),
5518 _methods(NULL),
5519 _inner_classes(NULL),
5520 _nest_members(NULL),
5521 _nest_host(0),
5522 _permitted_subclasses(NULL),
5523 _record_components(NULL),
5524 _local_interfaces(NULL),
5525 _transitive_interfaces(NULL),
5526 _combined_annotations(NULL),
5527 _class_annotations(NULL),
5528 _class_type_annotations(NULL),
5529 _fields_annotations(NULL),
5530 _fields_type_annotations(NULL),
5531 _klass(NULL),
5532 _klass_to_deallocate(NULL),
5533 _parsed_annotations(NULL),
5534 _fac(NULL),
5535 _field_info(NULL),
5536 _method_ordering(NULL),
5537 _all_mirandas(NULL),
5538 _vtable_size(0),
5539 _itable_size(0),
5540 _num_miranda_methods(0),
5541 _rt(REF_NONE),
5542 _protection_domain(cl_info->protection_domain()),
5543 _access_flags(),
5544 _pub_level(pub_level),
5545 _bad_constant_seen(0),
5546 _synthetic_flag(false),
5547 _sde_length(false),
5548 _sde_buffer(NULL),
5549 _sourcefile_index(0),
5550 _generic_signature_index(0),
5551 _major_version(0),
5552 _minor_version(0),
5553 _this_class_index(0),
5554 _super_class_index(0),
5555 _itfs_len(0),
5556 _java_fields_count(0),
5557 _need_verify(false),
5558 _relax_verify(false),
5559 _has_nonstatic_concrete_methods(false),
5560 _declares_nonstatic_concrete_methods(false),
5561 _has_final_method(false),
5562 _has_contended_fields(false),
5563 _has_finalizer(false),
5564 _has_empty_finalizer(false),
5565 _has_vanilla_constructor(false),
5566 _max_bootstrap_specifier_index(-1) {
5567
5568 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5569 _class_name->increment_refcount();
5570
5571 assert(_loader_data != NULL, "invariant");
5572 assert(stream != NULL, "invariant");
5573 assert(_stream != NULL, "invariant");
5574 assert(_stream->buffer() == _stream->current(), "invariant");
5575 assert(_class_name != NULL, "invariant");
5576 assert(0 == _access_flags.as_int(), "invariant");
5577
5578 // Figure out whether we can skip format checking (matching classic VM behavior)
5579 if (DumpSharedSpaces) {
5580 // verify == true means it's a 'remote' class (i.e., non-boot class)
5581 // Verification decision is based on BytecodeVerificationRemote flag
5582 // for those classes.
5583 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5584 BytecodeVerificationLocal;
5585 }
5586 else {
5587 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5588 stream->need_verify());
5589 }
5590
5591 // synch back verification state to stream
5592 stream->set_verify(_need_verify);
5593
5594 // Check if verification needs to be relaxed for this class file
5595 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5596 _relax_verify = relax_format_check_for(_loader_data);
5597
5598 parse_stream(stream, CHECK);
5599
5600 post_process_parsed_stream(stream, _cp, CHECK);
5601 }
5602
5603 void ClassFileParser::clear_class_metadata() {
5604 // metadata created before the instance klass is created. Must be
5605 // deallocated if classfile parsing returns an error.
5606 _cp = NULL;
5607 _fields = NULL;
5608 _methods = NULL;
5609 _inner_classes = NULL;
5610 _nest_members = NULL;
5611 _permitted_subclasses = NULL;
5612 _combined_annotations = NULL;
5613 _class_annotations = _class_type_annotations = NULL;
5614 _fields_annotations = _fields_type_annotations = NULL;
5615 _record_components = NULL;
5616 }
5617
5618 // Destructor to clean up
5619 ClassFileParser::~ClassFileParser() {
5620 _class_name->decrement_refcount();
5621
5622 if (_cp != NULL) {
5623 MetadataFactory::free_metadata(_loader_data, _cp);
5624 }
5625 if (_fields != NULL) {
5626 MetadataFactory::free_array<u2>(_loader_data, _fields);
5627 }
5628
5629 if (_methods != NULL) {
5630 // Free methods
5631 InstanceKlass::deallocate_methods(_loader_data, _methods);
5632 }
5633
5634 // beware of the Universe::empty_blah_array!!
5635 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5636 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5637 }
5638
5639 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
5640 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5641 }
5642
5643 if (_record_components != NULL) {
5644 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
5645 }
5646
5647 if (_permitted_subclasses != NULL && _permitted_subclasses != Universe::the_empty_short_array()) {
5648 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
5649 }
5650
5651 // Free interfaces
5652 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5653 _local_interfaces, _transitive_interfaces);
5654
5655 if (_combined_annotations != NULL) {
5656 // After all annotations arrays have been created, they are installed into the
5657 // Annotations object that will be assigned to the InstanceKlass being created.
5658
5659 // Deallocate the Annotations object and the installed annotations arrays.
5660 _combined_annotations->deallocate_contents(_loader_data);
5661
5662 // If the _combined_annotations pointer is non-NULL,
5663 // then the other annotations fields should have been cleared.
5664 assert(_class_annotations == NULL, "Should have been cleared");
5665 assert(_class_type_annotations == NULL, "Should have been cleared");
5666 assert(_fields_annotations == NULL, "Should have been cleared");
5667 assert(_fields_type_annotations == NULL, "Should have been cleared");
5668 } else {
5669 // If the annotations arrays were not installed into the Annotations object,
5670 // then they have to be deallocated explicitly.
5671 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
5672 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
5673 Annotations::free_contents(_loader_data, _fields_annotations);
5674 Annotations::free_contents(_loader_data, _fields_type_annotations);
5675 }
5676
5677 clear_class_metadata();
5678 _transitive_interfaces = NULL;
5679 _local_interfaces = NULL;
5680
5681 // deallocate the klass if already created. Don't directly deallocate, but add
5682 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5683 // at a safepoint.
5684 if (_klass_to_deallocate != NULL) {
5685 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5686 }
5687 }
5688
5689 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5690 TRAPS) {
5691
5692 assert(stream != NULL, "invariant");
5693 assert(_class_name != NULL, "invariant");
5694
5695 // BEGIN STREAM PARSING
5696 stream->guarantee_more(8, CHECK); // magic, major, minor
5697 // Magic value
5698 const u4 magic = stream->get_u4_fast();
5699 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5700 "Incompatible magic value %u in class file %s",
5701 magic, CHECK);
5702
5703 // Version numbers
5704 _minor_version = stream->get_u2_fast();
5705 _major_version = stream->get_u2_fast();
5706
5707 // Check version numbers - we check this even with verifier off
5708 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
5709
5710 stream->guarantee_more(3, CHECK); // length, first cp tag
5711 u2 cp_size = stream->get_u2_fast();
5712
5713 guarantee_property(
5714 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5715 cp_size, CHECK);
5716
5717 _orig_cp_size = cp_size;
5718 if (is_hidden()) { // Add a slot for hidden class name.
5719 cp_size++;
5720 }
5721
5722 _cp = ConstantPool::allocate(_loader_data,
5723 cp_size,
5724 CHECK);
5725
5726 ConstantPool* const cp = _cp;
5727
5728 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
5729
5730 assert(cp_size == (const u2)cp->length(), "invariant");
5731
5732 // ACCESS FLAGS
5733 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5734
5735 // Access flags
5736 jint flags;
5737 // JVM_ACC_MODULE is defined in JDK-9 and later.
5738 if (_major_version >= JAVA_9_VERSION) {
5739 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5740 } else {
5741 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5742 }
5743
5744 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5745 // Set abstract bit for old class files for backward compatibility
5746 flags |= JVM_ACC_ABSTRACT;
5747 }
5748
5749 verify_legal_class_modifiers(flags, CHECK);
5750
5751 short bad_constant = class_bad_constant_seen();
5752 if (bad_constant != 0) {
5753 // Do not throw CFE until after the access_flags are checked because if
5754 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5755 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
5756 return;
5757 }
5758
5759 _access_flags.set_flags(flags);
5760
5761 // This class and superclass
5762 _this_class_index = stream->get_u2_fast();
5763 check_property(
5764 valid_cp_range(_this_class_index, cp_size) &&
5765 cp->tag_at(_this_class_index).is_unresolved_klass(),
5766 "Invalid this class index %u in constant pool in class file %s",
5767 _this_class_index, CHECK);
5768
5769 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5770 assert(class_name_in_cp != NULL, "class_name can't be null");
5771
5772 // Don't need to check whether this class name is legal or not.
5773 // It has been checked when constant pool is parsed.
5774 // However, make sure it is not an array type.
5775 if (_need_verify) {
5776 guarantee_property(class_name_in_cp->char_at(0) != JVM_SIGNATURE_ARRAY,
5777 "Bad class name in class file %s",
5778 CHECK);
5779 }
5780
5781 #ifdef ASSERT
5782 // Basic sanity checks
5783 if (_is_hidden) {
5784 assert(_class_name != vmSymbols::unknown_class_name(), "hidden classes should have a special name");
5785 }
5786 #endif
5787
5788 // Update the _class_name as needed depending on whether this is a named, un-named, or hidden class.
5789
5790 if (_is_hidden) {
5791 assert(_class_name != NULL, "Unexpected null _class_name");
5792 #ifdef ASSERT
5793 if (_need_verify) {
5794 verify_legal_class_name(_class_name, CHECK);
5795 }
5796 #endif
5797
5798 } else {
5799 // Check if name in class file matches given name
5800 if (_class_name != class_name_in_cp) {
5801 if (_class_name != vmSymbols::unknown_class_name()) {
5802 ResourceMark rm(THREAD);
5803 Exceptions::fthrow(THREAD_AND_LOCATION,
5804 vmSymbols::java_lang_NoClassDefFoundError(),
5805 "%s (wrong name: %s)",
5806 class_name_in_cp->as_C_string(),
5807 _class_name->as_C_string()
5808 );
5809 return;
5810 } else {
5811 // The class name was not known by the caller so we set it from
5812 // the value in the CP.
5813 update_class_name(class_name_in_cp);
5814 }
5815 // else nothing to do: the expected class name matches what is in the CP
5816 }
5817 }
5818
5819 // Verification prevents us from creating names with dots in them, this
5820 // asserts that that's the case.
5821 assert(is_internal_format(_class_name), "external class name format used internally");
5822
5823 if (!is_internal()) {
5824 LogTarget(Debug, class, preorder) lt;
5825 if (lt.is_enabled()){
5826 ResourceMark rm(THREAD);
5827 LogStream ls(lt);
5828 ls.print("%s", _class_name->as_klass_external_name());
5829 if (stream->source() != NULL) {
5830 ls.print(" source: %s", stream->source());
5831 }
5832 ls.cr();
5833 }
5834 }
5835
5836 // SUPERKLASS
5837 _super_class_index = stream->get_u2_fast();
5838 _super_klass = parse_super_class(cp,
5839 _super_class_index,
5840 _need_verify,
5841 CHECK);
5842
5843 // Interfaces
5844 _itfs_len = stream->get_u2_fast();
5845 parse_interfaces(stream,
5846 _itfs_len,
5847 cp,
5848 &_has_nonstatic_concrete_methods,
5849 CHECK);
5850
5851 assert(_local_interfaces != NULL, "invariant");
5852
5853 // Fields (offsets are filled in later)
5854 _fac = new FieldAllocationCount();
5855 parse_fields(stream,
5856 _access_flags.is_interface(),
5857 _fac,
5858 cp,
5859 cp_size,
5860 &_java_fields_count,
5861 CHECK);
5862
5863 assert(_fields != NULL, "invariant");
5864
5865 // Methods
5866 AccessFlags promoted_flags;
5867 parse_methods(stream,
5868 _access_flags.is_interface(),
5869 &promoted_flags,
5870 &_has_final_method,
5871 &_declares_nonstatic_concrete_methods,
5872 CHECK);
5873
5874 assert(_methods != NULL, "invariant");
5875
5876 // promote flags from parse_methods() to the klass' flags
5877 _access_flags.add_promoted_flags(promoted_flags.as_int());
5878
5879 if (_declares_nonstatic_concrete_methods) {
5880 _has_nonstatic_concrete_methods = true;
5881 }
5882
5883 // Additional attributes/annotations
5884 _parsed_annotations = new ClassAnnotationCollector();
5885 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5886
5887 assert(_inner_classes != NULL, "invariant");
5888
5889 // Finalize the Annotations metadata object,
5890 // now that all annotation arrays have been created.
5891 create_combined_annotations(CHECK);
5892
5893 // Make sure this is the end of class file stream
5894 guarantee_property(stream->at_eos(),
5895 "Extra bytes at the end of class file %s",
5896 CHECK);
5897
5898 // all bytes in stream read and parsed
5899 }
5900
5901 void ClassFileParser::mangle_hidden_class_name(InstanceKlass* const ik) {
5902 ResourceMark rm;
5903 // Construct hidden name from _class_name, "+", and &ik. Note that we can't
5904 // use a '/' because that confuses finding the class's package. Also, can't
5905 // use an illegal char such as ';' because that causes serialization issues
5906 // and issues with hidden classes that create their own hidden classes.
5907 char addr_buf[20];
5908 if (DumpSharedSpaces) {
5909 // We want stable names for the archived hidden classes (only for static
5910 // archive for now). Spaces under default_SharedBaseAddress() will be
5911 // occupied by the archive at run time, so we know that no dynamically
5912 // loaded InstanceKlass will be placed under there.
5913 static volatile size_t counter = 0;
5914 Atomic::cmpxchg(&counter, (size_t)0, Arguments::default_SharedBaseAddress()); // initialize it
5915 size_t new_id = Atomic::add(&counter, (size_t)1);
5916 jio_snprintf(addr_buf, 20, SIZE_FORMAT_HEX, new_id);
5917 } else {
5918 jio_snprintf(addr_buf, 20, INTPTR_FORMAT, p2i(ik));
5919 }
5920 size_t new_name_len = _class_name->utf8_length() + 2 + strlen(addr_buf);
5921 char* new_name = NEW_RESOURCE_ARRAY(char, new_name_len);
5922 jio_snprintf(new_name, new_name_len, "%s+%s",
5923 _class_name->as_C_string(), addr_buf);
5924 update_class_name(SymbolTable::new_symbol(new_name));
5925
5926 // Add a Utf8 entry containing the hidden name.
5927 assert(_class_name != NULL, "Unexpected null _class_name");
5928 int hidden_index = _orig_cp_size; // this is an extra slot we added
5929 _cp->symbol_at_put(hidden_index, _class_name);
5930
5931 // Update this_class_index's slot in the constant pool with the new Utf8 entry.
5932 // We have to update the resolved_klass_index and the name_index together
5933 // so extract the existing resolved_klass_index first.
5934 CPKlassSlot cp_klass_slot = _cp->klass_slot_at(_this_class_index);
5935 int resolved_klass_index = cp_klass_slot.resolved_klass_index();
5936 _cp->unresolved_klass_at_put(_this_class_index, hidden_index, resolved_klass_index);
5937 assert(_cp->klass_slot_at(_this_class_index).name_index() == _orig_cp_size,
5938 "Bad name_index");
5939 }
5940
5941 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5942 ConstantPool* cp,
5943 TRAPS) {
5944 assert(stream != NULL, "invariant");
5945 assert(stream->at_eos(), "invariant");
5946 assert(cp != NULL, "invariant");
5947 assert(_loader_data != NULL, "invariant");
5948
5949 if (_class_name == vmSymbols::java_lang_Object()) {
5950 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
5951 "java.lang.Object cannot implement an interface in class file %s",
5952 CHECK);
5953 }
5954 // We check super class after class file is parsed and format is checked
5955 if (_super_class_index > 0 && NULL == _super_klass) {
5956 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5957 if (_access_flags.is_interface()) {
5958 // Before attempting to resolve the superclass, check for class format
5959 // errors not checked yet.
5960 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5961 "Interfaces must have java.lang.Object as superclass in class file %s",
5962 CHECK);
5963 }
5964 Handle loader(THREAD, _loader_data->class_loader());
5965 _super_klass = (const InstanceKlass*)
5966 SystemDictionary::resolve_super_or_fail(_class_name,
5967 super_class_name,
5968 loader,
5969 _protection_domain,
5970 true,
5971 CHECK);
5972 }
5973
5974 if (_super_klass != NULL) {
5975 if (_super_klass->has_nonstatic_concrete_methods()) {
5976 _has_nonstatic_concrete_methods = true;
5977 }
5978
5979 if (_super_klass->is_interface()) {
5980 classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
5981 return;
5982 }
5983 }
5984
5985 // Compute the transitive list of all unique interfaces implemented by this class
5986 _transitive_interfaces =
5987 compute_transitive_interfaces(_super_klass,
5988 _local_interfaces,
5989 _loader_data,
5990 CHECK);
5991
5992 assert(_transitive_interfaces != NULL, "invariant");
5993
5994 // sort methods
5995 _method_ordering = sort_methods(_methods);
5996
5997 _all_mirandas = new GrowableArray<Method*>(20);
5998
5999 Handle loader(THREAD, _loader_data->class_loader());
6000 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6001 &_num_miranda_methods,
6002 _all_mirandas,
6003 _super_klass,
6004 _methods,
6005 _access_flags,
6006 _major_version,
6007 loader,
6008 _class_name,
6009 _local_interfaces);
6010
6011 // Size of Java itable (in words)
6012 _itable_size = _access_flags.is_interface() ? 0 :
6013 klassItable::compute_itable_size(_transitive_interfaces);
6014
6015 assert(_fac != NULL, "invariant");
6016 assert(_parsed_annotations != NULL, "invariant");
6017
6018 _field_info = new FieldLayoutInfo();
6019 FieldLayoutBuilder lb(class_name(), super_klass(), _cp, _fields,
6020 _parsed_annotations->is_contended(), _field_info);
6021 lb.build_layout();
6022
6023 // Compute reference typ
6024 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6025
6026 }
6027
6028 void ClassFileParser::set_klass(InstanceKlass* klass) {
6029
6030 #ifdef ASSERT
6031 if (klass != NULL) {
6032 assert(NULL == _klass, "leaking?");
6033 }
6034 #endif
6035
6036 _klass = klass;
6037 }
6038
6039 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6040
6041 #ifdef ASSERT
6042 if (klass != NULL) {
6043 assert(NULL == _klass_to_deallocate, "leaking?");
6044 }
6045 #endif
6046
6047 _klass_to_deallocate = klass;
6048 }
6049
6050 // Caller responsible for ResourceMark
6051 // clone stream with rewound position
6052 const ClassFileStream* ClassFileParser::clone_stream() const {
6053 assert(_stream != NULL, "invariant");
6054
6055 return _stream->clone();
6056 }
6057 // ----------------------------------------------------------------------------
6058 // debugging
6059
6060 #ifdef ASSERT
6061
6062 // return true if class_name contains no '.' (internal format is '/')
6063 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6064 if (class_name != NULL) {
6065 ResourceMark rm;
6066 char* name = class_name->as_C_string();
6067 return strchr(name, JVM_SIGNATURE_DOT) == NULL;
6068 } else {
6069 return true;
6070 }
6071 }
6072
6073 #endif