1 /*
2 * Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "aot/aotLoader.hpp"
28 #include "classfile/classFileParser.hpp"
29 #include "classfile/classFileStream.hpp"
30 #include "classfile/classLoader.hpp"
31 #include "classfile/classLoaderData.inline.hpp"
32 #include "classfile/defaultMethods.hpp"
33 #include "classfile/dictionary.hpp"
34 #include "classfile/fieldLayoutBuilder.hpp"
35 #include "classfile/javaClasses.inline.hpp"
36 #include "classfile/moduleEntry.hpp"
37 #include "classfile/packageEntry.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/verificationType.hpp"
41 #include "classfile/verifier.hpp"
42 #include "classfile/vmSymbols.hpp"
43 #include "logging/log.hpp"
44 #include "logging/logStream.hpp"
45 #include "memory/allocation.hpp"
46 #include "memory/metadataFactory.hpp"
47 #include "memory/oopFactory.hpp"
48 #include "memory/resourceArea.hpp"
49 #include "memory/universe.hpp"
50 #include "oops/annotations.hpp"
51 #include "oops/constantPool.inline.hpp"
52 #include "oops/fieldStreams.inline.hpp"
53 #include "oops/instanceKlass.hpp"
54 #include "oops/instanceMirrorKlass.hpp"
55 #include "oops/klass.inline.hpp"
56 #include "oops/klassVtable.hpp"
57 #include "oops/metadata.hpp"
58 #include "oops/method.inline.hpp"
59 #include "oops/oop.inline.hpp"
60 #include "oops/recordComponent.hpp"
61 #include "oops/symbol.hpp"
62 #include "oops/valueKlass.inline.hpp"
63 #include "prims/jvmtiExport.hpp"
64 #include "prims/jvmtiThreadState.hpp"
65 #include "runtime/arguments.hpp"
66 #include "runtime/fieldDescriptor.inline.hpp"
67 #include "runtime/handles.inline.hpp"
68 #include "runtime/javaCalls.hpp"
69 #include "runtime/os.hpp"
70 #include "runtime/perfData.hpp"
71 #include "runtime/reflection.hpp"
72 #include "runtime/safepointVerifiers.hpp"
73 #include "runtime/signature.hpp"
74 #include "runtime/timer.hpp"
75 #include "services/classLoadingService.hpp"
76 #include "services/threadService.hpp"
77 #include "utilities/align.hpp"
78 #include "utilities/bitMap.inline.hpp"
79 #include "utilities/copy.hpp"
80 #include "utilities/exceptions.hpp"
81 #include "utilities/globalDefinitions.hpp"
82 #include "utilities/growableArray.hpp"
83 #include "utilities/macros.hpp"
84 #include "utilities/ostream.hpp"
85 #include "utilities/resourceHash.hpp"
86 #include "utilities/utf8.hpp"
87
88 #if INCLUDE_CDS
89 #include "classfile/systemDictionaryShared.hpp"
90 #endif
91 #if INCLUDE_JFR
92 #include "jfr/support/jfrTraceIdExtension.hpp"
93 #endif
94
95 // We generally try to create the oops directly when parsing, rather than
96 // allocating temporary data structures and copying the bytes twice. A
97 // temporary area is only needed when parsing utf8 entries in the constant
98 // pool and when parsing line number tables.
99
100 // We add assert in debug mode when class format is not checked.
101
102 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
103 #define JAVA_MIN_SUPPORTED_VERSION 45
104 #define JAVA_PREVIEW_MINOR_VERSION 65535
105
106 // Used for two backward compatibility reasons:
107 // - to check for new additions to the class file format in JDK1.5
108 // - to check for bug fixes in the format checker in JDK1.5
109 #define JAVA_1_5_VERSION 49
110
111 // Used for backward compatibility reasons:
112 // - to check for javac bug fixes that happened after 1.5
113 // - also used as the max version when running in jdk6
114 #define JAVA_6_VERSION 50
115
116 // Used for backward compatibility reasons:
117 // - to disallow argument and require ACC_STATIC for <clinit> methods
118 #define JAVA_7_VERSION 51
119
120 // Extension method support.
121 #define JAVA_8_VERSION 52
122
123 #define JAVA_9_VERSION 53
124
125 #define JAVA_10_VERSION 54
126
127 #define JAVA_11_VERSION 55
128
129 #define JAVA_12_VERSION 56
130
131 #define JAVA_13_VERSION 57
132
133 #define JAVA_14_VERSION 58
134
135 #define JAVA_15_VERSION 59
136
137 #define CONSTANT_CLASS_DESCRIPTORS 59
138
139 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
140 assert((bad_constant == JVM_CONSTANT_Module ||
141 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
142 "Unexpected bad constant pool entry");
143 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
144 }
145
146 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
147 ConstantPool* cp,
148 const int length,
149 TRAPS) {
150 assert(stream != NULL, "invariant");
151 assert(cp != NULL, "invariant");
152
153 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
154 // this function (_current can be allocated in a register, with scalar
155 // replacement of aggregates). The _current pointer is copied back to
156 // stream() when this function returns. DON'T call another method within
157 // this method that uses stream().
158 const ClassFileStream cfs1 = *stream;
159 const ClassFileStream* const cfs = &cfs1;
160
161 assert(cfs->allocated_on_stack(), "should be local");
162 debug_only(const u1* const old_current = stream->current();)
163
164 // Used for batching symbol allocations.
165 const char* names[SymbolTable::symbol_alloc_batch_size];
166 int lengths[SymbolTable::symbol_alloc_batch_size];
167 int indices[SymbolTable::symbol_alloc_batch_size];
168 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
169 int names_count = 0;
170
171 // parsing Index 0 is unused
172 for (int index = 1; index < length; index++) {
173 // Each of the following case guarantees one more byte in the stream
174 // for the following tag or the access_flags following constant pool,
175 // so we don't need bounds-check for reading tag.
176 const u1 tag = cfs->get_u1_fast();
177 switch (tag) {
178 case JVM_CONSTANT_Class: {
179 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
180 const u2 name_index = cfs->get_u2_fast();
181 cp->klass_index_at_put(index, name_index);
182 break;
183 }
184 case JVM_CONSTANT_Fieldref: {
185 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
186 const u2 class_index = cfs->get_u2_fast();
187 const u2 name_and_type_index = cfs->get_u2_fast();
188 cp->field_at_put(index, class_index, name_and_type_index);
189 break;
190 }
191 case JVM_CONSTANT_Methodref: {
192 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
193 const u2 class_index = cfs->get_u2_fast();
194 const u2 name_and_type_index = cfs->get_u2_fast();
195 cp->method_at_put(index, class_index, name_and_type_index);
196 break;
197 }
198 case JVM_CONSTANT_InterfaceMethodref: {
199 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
200 const u2 class_index = cfs->get_u2_fast();
201 const u2 name_and_type_index = cfs->get_u2_fast();
202 cp->interface_method_at_put(index, class_index, name_and_type_index);
203 break;
204 }
205 case JVM_CONSTANT_String : {
206 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
207 const u2 string_index = cfs->get_u2_fast();
208 cp->string_index_at_put(index, string_index);
209 break;
210 }
211 case JVM_CONSTANT_MethodHandle :
212 case JVM_CONSTANT_MethodType: {
213 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
214 classfile_parse_error(
215 "Class file version does not support constant tag %u in class file %s",
216 tag, CHECK);
217 }
218 if (tag == JVM_CONSTANT_MethodHandle) {
219 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
220 const u1 ref_kind = cfs->get_u1_fast();
221 const u2 method_index = cfs->get_u2_fast();
222 cp->method_handle_index_at_put(index, ref_kind, method_index);
223 }
224 else if (tag == JVM_CONSTANT_MethodType) {
225 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
226 const u2 signature_index = cfs->get_u2_fast();
227 cp->method_type_index_at_put(index, signature_index);
228 }
229 else {
230 ShouldNotReachHere();
231 }
232 break;
233 }
234 case JVM_CONSTANT_Dynamic : {
235 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
236 classfile_parse_error(
237 "Class file version does not support constant tag %u in class file %s",
238 tag, CHECK);
239 }
240 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
241 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
242 const u2 name_and_type_index = cfs->get_u2_fast();
243 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
244 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
245 }
246 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
247 break;
248 }
249 case JVM_CONSTANT_InvokeDynamic : {
250 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
251 classfile_parse_error(
252 "Class file version does not support constant tag %u in class file %s",
253 tag, CHECK);
254 }
255 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
256 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
257 const u2 name_and_type_index = cfs->get_u2_fast();
258 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
259 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
260 }
261 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
262 break;
263 }
264 case JVM_CONSTANT_Integer: {
265 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
266 const u4 bytes = cfs->get_u4_fast();
267 cp->int_at_put(index, (jint)bytes);
268 break;
269 }
270 case JVM_CONSTANT_Float: {
271 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
272 const u4 bytes = cfs->get_u4_fast();
273 cp->float_at_put(index, *(jfloat*)&bytes);
274 break;
275 }
276 case JVM_CONSTANT_Long: {
277 // A mangled type might cause you to overrun allocated memory
278 guarantee_property(index + 1 < length,
279 "Invalid constant pool entry %u in class file %s",
280 index,
281 CHECK);
282 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
283 const u8 bytes = cfs->get_u8_fast();
284 cp->long_at_put(index, bytes);
285 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
286 break;
287 }
288 case JVM_CONSTANT_Double: {
289 // A mangled type might cause you to overrun allocated memory
290 guarantee_property(index+1 < length,
291 "Invalid constant pool entry %u in class file %s",
292 index,
293 CHECK);
294 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
295 const u8 bytes = cfs->get_u8_fast();
296 cp->double_at_put(index, *(jdouble*)&bytes);
297 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
298 break;
299 }
300 case JVM_CONSTANT_NameAndType: {
301 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
302 const u2 name_index = cfs->get_u2_fast();
303 const u2 signature_index = cfs->get_u2_fast();
304 cp->name_and_type_at_put(index, name_index, signature_index);
305 break;
306 }
307 case JVM_CONSTANT_Utf8 : {
308 cfs->guarantee_more(2, CHECK); // utf8_length
309 u2 utf8_length = cfs->get_u2_fast();
310 const u1* utf8_buffer = cfs->current();
311 assert(utf8_buffer != NULL, "null utf8 buffer");
312 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
313 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
314 cfs->skip_u1_fast(utf8_length);
315
316 // Before storing the symbol, make sure it's legal
317 if (_need_verify) {
318 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
319 }
320
321 if (has_cp_patch_at(index)) {
322 Handle patch = clear_cp_patch_at(index);
323 guarantee_property(java_lang_String::is_instance(patch()),
324 "Illegal utf8 patch at %d in class file %s",
325 index,
326 CHECK);
327 const char* const str = java_lang_String::as_utf8_string(patch());
328 // (could use java_lang_String::as_symbol instead, but might as well batch them)
329 utf8_buffer = (const u1*) str;
330 utf8_length = (u2) strlen(str);
331 }
332
333 unsigned int hash;
334 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
335 utf8_length,
336 hash);
337 if (result == NULL) {
338 names[names_count] = (const char*)utf8_buffer;
339 lengths[names_count] = utf8_length;
340 indices[names_count] = index;
341 hashValues[names_count++] = hash;
342 if (names_count == SymbolTable::symbol_alloc_batch_size) {
343 SymbolTable::new_symbols(_loader_data,
344 constantPoolHandle(THREAD, cp),
345 names_count,
346 names,
347 lengths,
348 indices,
349 hashValues);
350 names_count = 0;
351 }
352 } else {
353 cp->symbol_at_put(index, result);
354 }
355 break;
356 }
357 case JVM_CONSTANT_Module:
358 case JVM_CONSTANT_Package: {
359 // Record that an error occurred in these two cases but keep parsing so
360 // that ACC_Module can be checked for in the access_flags. Need to
361 // throw NoClassDefFoundError in that case.
362 if (_major_version >= JAVA_9_VERSION) {
363 cfs->guarantee_more(3, CHECK);
364 cfs->get_u2_fast();
365 set_class_bad_constant_seen(tag);
366 break;
367 }
368 }
369 default: {
370 classfile_parse_error("Unknown constant tag %u in class file %s",
371 tag,
372 CHECK);
373 break;
374 }
375 } // end of switch(tag)
376 } // end of for
377
378 // Allocate the remaining symbols
379 if (names_count > 0) {
380 SymbolTable::new_symbols(_loader_data,
381 constantPoolHandle(THREAD, cp),
382 names_count,
383 names,
384 lengths,
385 indices,
386 hashValues);
387 }
388
389 // Copy _current pointer of local copy back to stream.
390 assert(stream->current() == old_current, "non-exclusive use of stream");
391 stream->set_current(cfs1.current());
392
393 }
394
395 static inline bool valid_cp_range(int index, int length) {
396 return (index > 0 && index < length);
397 }
398
399 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
400 assert(cp != NULL, "invariant");
401 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
402 return cp->symbol_at(index);
403 }
404 return NULL;
405 }
406
407 #ifdef ASSERT
408 PRAGMA_DIAG_PUSH
409 PRAGMA_FORMAT_NONLITERAL_IGNORED
410 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
411 ResourceMark rm(THREAD);
412 fatal(msg, _class_name->as_C_string());
413 }
414
415 void ClassFileParser::report_assert_property_failure(const char* msg,
416 int index,
417 TRAPS) const {
418 ResourceMark rm(THREAD);
419 fatal(msg, index, _class_name->as_C_string());
420 }
421 PRAGMA_DIAG_POP
422 #endif
423
424 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
425 ConstantPool* const cp,
426 const int length,
427 TRAPS) {
428 assert(cp != NULL, "invariant");
429 assert(stream != NULL, "invariant");
430
431 // parsing constant pool entries
432 parse_constant_pool_entries(stream, cp, length, CHECK);
433 if (class_bad_constant_seen() != 0) {
434 // a bad CP entry has been detected previously so stop parsing and just return.
435 return;
436 }
437
438 int index = 1; // declared outside of loops for portability
439 int num_klasses = 0;
440
441 // first verification pass - validate cross references
442 // and fixup class and string constants
443 for (index = 1; index < length; index++) { // Index 0 is unused
444 const jbyte tag = cp->tag_at(index).value();
445 switch (tag) {
446 case JVM_CONSTANT_Class: {
447 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
448 break;
449 }
450 case JVM_CONSTANT_Fieldref:
451 // fall through
452 case JVM_CONSTANT_Methodref:
453 // fall through
454 case JVM_CONSTANT_InterfaceMethodref: {
455 if (!_need_verify) break;
456 const int klass_ref_index = cp->klass_ref_index_at(index);
457 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
458 check_property(valid_klass_reference_at(klass_ref_index),
459 "Invalid constant pool index %u in class file %s",
460 klass_ref_index, CHECK);
461 check_property(valid_cp_range(name_and_type_ref_index, length) &&
462 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
463 "Invalid constant pool index %u in class file %s",
464 name_and_type_ref_index, CHECK);
465 break;
466 }
467 case JVM_CONSTANT_String: {
468 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
469 break;
470 }
471 case JVM_CONSTANT_Integer:
472 break;
473 case JVM_CONSTANT_Float:
474 break;
475 case JVM_CONSTANT_Long:
476 case JVM_CONSTANT_Double: {
477 index++;
478 check_property(
479 (index < length && cp->tag_at(index).is_invalid()),
480 "Improper constant pool long/double index %u in class file %s",
481 index, CHECK);
482 break;
483 }
484 case JVM_CONSTANT_NameAndType: {
485 if (!_need_verify) break;
486 const int name_ref_index = cp->name_ref_index_at(index);
487 const int signature_ref_index = cp->signature_ref_index_at(index);
488 check_property(valid_symbol_at(name_ref_index),
489 "Invalid constant pool index %u in class file %s",
490 name_ref_index, CHECK);
491 check_property(valid_symbol_at(signature_ref_index),
492 "Invalid constant pool index %u in class file %s",
493 signature_ref_index, CHECK);
494 break;
495 }
496 case JVM_CONSTANT_Utf8:
497 break;
498 case JVM_CONSTANT_UnresolvedClass: // fall-through
499 case JVM_CONSTANT_UnresolvedClassInError: {
500 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
501 break;
502 }
503 case JVM_CONSTANT_ClassIndex: {
504 const int class_index = cp->klass_index_at(index);
505 check_property(valid_symbol_at(class_index),
506 "Invalid constant pool index %u in class file %s",
507 class_index, CHECK);
508
509 Symbol* const name = cp->symbol_at(class_index);
510 const unsigned int name_len = name->utf8_length();
511 if (name->is_Q_signature()) {
512 cp->unresolved_qdescriptor_at_put(index, class_index, num_klasses++);
513 } else {
514 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
515 }
516 break;
517 }
518 case JVM_CONSTANT_StringIndex: {
519 const int string_index = cp->string_index_at(index);
520 check_property(valid_symbol_at(string_index),
521 "Invalid constant pool index %u in class file %s",
522 string_index, CHECK);
523 Symbol* const sym = cp->symbol_at(string_index);
524 cp->unresolved_string_at_put(index, sym);
525 break;
526 }
527 case JVM_CONSTANT_MethodHandle: {
528 const int ref_index = cp->method_handle_index_at(index);
529 check_property(valid_cp_range(ref_index, length),
530 "Invalid constant pool index %u in class file %s",
531 ref_index, CHECK);
532 const constantTag tag = cp->tag_at(ref_index);
533 const int ref_kind = cp->method_handle_ref_kind_at(index);
534
535 switch (ref_kind) {
536 case JVM_REF_getField:
537 case JVM_REF_getStatic:
538 case JVM_REF_putField:
539 case JVM_REF_putStatic: {
540 check_property(
541 tag.is_field(),
542 "Invalid constant pool index %u in class file %s (not a field)",
543 ref_index, CHECK);
544 break;
545 }
546 case JVM_REF_invokeVirtual:
547 case JVM_REF_newInvokeSpecial: {
548 check_property(
549 tag.is_method(),
550 "Invalid constant pool index %u in class file %s (not a method)",
551 ref_index, CHECK);
552 break;
553 }
554 case JVM_REF_invokeStatic:
555 case JVM_REF_invokeSpecial: {
556 check_property(
557 tag.is_method() ||
558 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
559 "Invalid constant pool index %u in class file %s (not a method)",
560 ref_index, CHECK);
561 break;
562 }
563 case JVM_REF_invokeInterface: {
564 check_property(
565 tag.is_interface_method(),
566 "Invalid constant pool index %u in class file %s (not an interface method)",
567 ref_index, CHECK);
568 break;
569 }
570 default: {
571 classfile_parse_error(
572 "Bad method handle kind at constant pool index %u in class file %s",
573 index, CHECK);
574 }
575 } // switch(refkind)
576 // Keep the ref_index unchanged. It will be indirected at link-time.
577 break;
578 } // case MethodHandle
579 case JVM_CONSTANT_MethodType: {
580 const int ref_index = cp->method_type_index_at(index);
581 check_property(valid_symbol_at(ref_index),
582 "Invalid constant pool index %u in class file %s",
583 ref_index, CHECK);
584 break;
585 }
586 case JVM_CONSTANT_Dynamic: {
587 const int name_and_type_ref_index =
588 cp->bootstrap_name_and_type_ref_index_at(index);
589
590 check_property(valid_cp_range(name_and_type_ref_index, length) &&
591 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
592 "Invalid constant pool index %u in class file %s",
593 name_and_type_ref_index, CHECK);
594 // bootstrap specifier index must be checked later,
595 // when BootstrapMethods attr is available
596
597 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
598 cp->set_has_dynamic_constant();
599 break;
600 }
601 case JVM_CONSTANT_InvokeDynamic: {
602 const int name_and_type_ref_index =
603 cp->bootstrap_name_and_type_ref_index_at(index);
604
605 check_property(valid_cp_range(name_and_type_ref_index, length) &&
606 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
607 "Invalid constant pool index %u in class file %s",
608 name_and_type_ref_index, CHECK);
609 // bootstrap specifier index must be checked later,
610 // when BootstrapMethods attr is available
611 break;
612 }
613 default: {
614 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
615 ShouldNotReachHere();
616 break;
617 }
618 } // switch(tag)
619 } // end of for
620
621 _first_patched_klass_resolved_index = num_klasses;
622 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
623
624 if (_cp_patches != NULL) {
625 // need to treat this_class specially...
626
627 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
628 // for now. These will be replaced with actual names of the patched classes in patch_class().
629 Symbol* s = vmSymbols::star_name();
630 for (int n=_orig_cp_size; n<cp->length(); n++) {
631 cp->symbol_at_put(n, s);
632 }
633
634 int this_class_index;
635 {
636 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
637 const u1* const mark = stream->current();
638 stream->skip_u2_fast(1); // skip flags
639 this_class_index = stream->get_u2_fast();
640 stream->set_current(mark); // revert to mark
641 }
642
643 for (index = 1; index < length; index++) { // Index 0 is unused
644 if (has_cp_patch_at(index)) {
645 guarantee_property(index != this_class_index,
646 "Illegal constant pool patch to self at %d in class file %s",
647 index, CHECK);
648 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
649 }
650 }
651 }
652
653 if (!_need_verify) {
654 return;
655 }
656
657 // second verification pass - checks the strings are of the right format.
658 // but not yet to the other entries
659 for (index = 1; index < length; index++) {
660 const jbyte tag = cp->tag_at(index).value();
661 switch (tag) {
662 case JVM_CONSTANT_UnresolvedClass: {
663 const Symbol* const class_name = cp->klass_name_at(index);
664 // check the name, even if _cp_patches will overwrite it
665 verify_legal_class_name(class_name, CHECK);
666 break;
667 }
668 case JVM_CONSTANT_NameAndType: {
669 if (_need_verify) {
670 const int sig_index = cp->signature_ref_index_at(index);
671 const int name_index = cp->name_ref_index_at(index);
672 const Symbol* const name = cp->symbol_at(name_index);
673 const Symbol* const sig = cp->symbol_at(sig_index);
674 guarantee_property(sig->utf8_length() != 0,
675 "Illegal zero length constant pool entry at %d in class %s",
676 sig_index, CHECK);
677 guarantee_property(name->utf8_length() != 0,
678 "Illegal zero length constant pool entry at %d in class %s",
679 name_index, CHECK);
680
681 if (Signature::is_method(sig)) {
682 // Format check method name and signature
683 verify_legal_method_name(name, CHECK);
684 verify_legal_method_signature(name, sig, CHECK);
685 } else {
686 // Format check field name and signature
687 verify_legal_field_name(name, CHECK);
688 verify_legal_field_signature(name, sig, CHECK);
689 }
690 }
691 break;
692 }
693 case JVM_CONSTANT_Dynamic: {
694 const int name_and_type_ref_index =
695 cp->name_and_type_ref_index_at(index);
696 // already verified to be utf8
697 const int name_ref_index =
698 cp->name_ref_index_at(name_and_type_ref_index);
699 // already verified to be utf8
700 const int signature_ref_index =
701 cp->signature_ref_index_at(name_and_type_ref_index);
702 const Symbol* const name = cp->symbol_at(name_ref_index);
703 const Symbol* const signature = cp->symbol_at(signature_ref_index);
704 if (_need_verify) {
705 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
706 // Need only to be sure signature is the right type.
707 if (Signature::is_method(signature)) {
708 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
709 }
710 }
711 break;
712 }
713 case JVM_CONSTANT_InvokeDynamic:
714 case JVM_CONSTANT_Fieldref:
715 case JVM_CONSTANT_Methodref:
716 case JVM_CONSTANT_InterfaceMethodref: {
717 const int name_and_type_ref_index =
718 cp->name_and_type_ref_index_at(index);
719 // already verified to be utf8
720 const int name_ref_index =
721 cp->name_ref_index_at(name_and_type_ref_index);
722 // already verified to be utf8
723 const int signature_ref_index =
724 cp->signature_ref_index_at(name_and_type_ref_index);
725 const Symbol* const name = cp->symbol_at(name_ref_index);
726 const Symbol* const signature = cp->symbol_at(signature_ref_index);
727 if (tag == JVM_CONSTANT_Fieldref) {
728 if (_need_verify) {
729 // Field name and signature are verified above, when iterating NameAndType_info.
730 // Need only to be sure signature is non-zero length and the right type.
731 if (Signature::is_method(signature)) {
732 throwIllegalSignature("Field", name, signature, CHECK);
733 }
734 }
735 } else {
736 if (_need_verify) {
737 // Method name and signature are verified above, when iterating NameAndType_info.
738 // Need only to be sure signature is non-zero length and the right type.
739 if (!Signature::is_method(signature)) {
740 throwIllegalSignature("Method", name, signature, CHECK);
741 }
742 }
743 // 4509014: If a class method name begins with '<', it must be "<init>"
744 const unsigned int name_len = name->utf8_length();
745 if (tag == JVM_CONSTANT_Methodref &&
746 name_len != 0 &&
747 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
748 name != vmSymbols::object_initializer_name()) {
749 classfile_parse_error(
750 "Bad method name at constant pool index %u in class file %s",
751 name_ref_index, CHECK);
752 }
753 }
754 break;
755 }
756 case JVM_CONSTANT_MethodHandle: {
757 const int ref_index = cp->method_handle_index_at(index);
758 const int ref_kind = cp->method_handle_ref_kind_at(index);
759 switch (ref_kind) {
760 case JVM_REF_invokeVirtual:
761 case JVM_REF_invokeStatic:
762 case JVM_REF_invokeSpecial:
763 case JVM_REF_newInvokeSpecial: {
764 const int name_and_type_ref_index =
765 cp->name_and_type_ref_index_at(ref_index);
766 const int name_ref_index =
767 cp->name_ref_index_at(name_and_type_ref_index);
768 const Symbol* const name = cp->symbol_at(name_ref_index);
769 if (name != vmSymbols::object_initializer_name()) {
770 if (ref_kind == JVM_REF_newInvokeSpecial) {
771 classfile_parse_error(
772 "Bad constructor name at constant pool index %u in class file %s",
773 name_ref_index, CHECK);
774 }
775 } else {
776 // The allowed invocation mode of <init> depends on its signature.
777 // This test corresponds to verify_invoke_instructions in the verifier.
778 const int signature_ref_index =
779 cp->signature_ref_index_at(name_and_type_ref_index);
780 const Symbol* const signature = cp->symbol_at(signature_ref_index);
781 if (signature->is_void_method_signature()
782 && ref_kind == JVM_REF_newInvokeSpecial) {
783 // OK, could be a constructor call
784 } else if (!signature->is_void_method_signature()
785 && ref_kind == JVM_REF_invokeStatic) {
786 // also OK, could be a static factory call
787 } else {
788 classfile_parse_error(
789 "Bad method name at constant pool index %u in class file %s",
790 name_ref_index, CHECK);
791 }
792 }
793 break;
794 }
795 // Other ref_kinds are already fully checked in previous pass.
796 } // switch(ref_kind)
797 break;
798 }
799 case JVM_CONSTANT_MethodType: {
800 const Symbol* const no_name = vmSymbols::type_name(); // place holder
801 const Symbol* const signature = cp->method_type_signature_at(index);
802 verify_legal_method_signature(no_name, signature, CHECK);
803 break;
804 }
805 case JVM_CONSTANT_Utf8: {
806 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
807 }
808 } // switch(tag)
809 } // end of for
810 }
811
812 Handle ClassFileParser::clear_cp_patch_at(int index) {
813 Handle patch = cp_patch_at(index);
814 _cp_patches->at_put(index, Handle());
815 assert(!has_cp_patch_at(index), "");
816 return patch;
817 }
818
819 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
820 int name_index = _orig_cp_size + _num_patched_klasses;
821 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
822
823 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
824 _num_patched_klasses ++;
825 }
826
827 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
828 int index,
829 Handle patch,
830 TRAPS) {
831 assert(cp != NULL, "invariant");
832
833 BasicType patch_type = T_VOID;
834
835 switch (cp->tag_at(index).value()) {
836
837 case JVM_CONSTANT_UnresolvedClass: {
838 // Patching a class means pre-resolving it.
839 // The name in the constant pool is ignored.
840 if (java_lang_Class::is_instance(patch())) {
841 guarantee_property(!java_lang_Class::is_primitive(patch()),
842 "Illegal class patch at %d in class file %s",
843 index, CHECK);
844 Klass* k = java_lang_Class::as_Klass(patch());
845 patch_class(cp, index, k, k->name());
846 } else {
847 guarantee_property(java_lang_String::is_instance(patch()),
848 "Illegal class patch at %d in class file %s",
849 index, CHECK);
850 Symbol* const name = java_lang_String::as_symbol(patch());
851 patch_class(cp, index, NULL, name);
852 }
853 break;
854 }
855
856 case JVM_CONSTANT_String: {
857 // skip this patch and don't clear it. Needs the oop array for resolved
858 // references to be created first.
859 return;
860 }
861 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
862 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
863 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
864 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
865 patch_prim:
866 {
867 jvalue value;
868 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
869 guarantee_property(value_type == patch_type,
870 "Illegal primitive patch at %d in class file %s",
871 index, CHECK);
872 switch (value_type) {
873 case T_INT: cp->int_at_put(index, value.i); break;
874 case T_FLOAT: cp->float_at_put(index, value.f); break;
875 case T_LONG: cp->long_at_put(index, value.j); break;
876 case T_DOUBLE: cp->double_at_put(index, value.d); break;
877 default: assert(false, "");
878 }
879 } // end patch_prim label
880 break;
881
882 default: {
883 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
884 guarantee_property(!has_cp_patch_at(index),
885 "Illegal unexpected patch at %d in class file %s",
886 index, CHECK);
887 return;
888 }
889 } // end of switch(tag)
890
891 // On fall-through, mark the patch as used.
892 clear_cp_patch_at(index);
893 }
894 class NameSigHash: public ResourceObj {
895 public:
896 const Symbol* _name; // name
897 const Symbol* _sig; // signature
898 NameSigHash* _next; // Next entry in hash table
899 };
900
901 static const int HASH_ROW_SIZE = 256;
902
903 static unsigned int hash(const Symbol* name, const Symbol* sig) {
904 unsigned int raw_hash = 0;
905 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
906 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
907
908 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
909 }
910
911
912 static void initialize_hashtable(NameSigHash** table) {
913 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
914 }
915 // Return false if the name/sig combination is found in table.
916 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
917 // The old format checker uses heap sort to find duplicates.
918 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
919 // of table since we don't expect Symbol*'s to move.
920 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
921 assert(name != NULL, "name in constant pool is NULL");
922
923 // First lookup for duplicates
924 int index = hash(name, sig);
925 NameSigHash* entry = table[index];
926 while (entry != NULL) {
927 if (entry->_name == name && entry->_sig == sig) {
928 return false;
929 }
930 entry = entry->_next;
931 }
932
933 // No duplicate is found, allocate a new entry and fill it.
934 entry = new NameSigHash();
935 entry->_name = name;
936 entry->_sig = sig;
937
938 // Insert into hash table
939 entry->_next = table[index];
940 table[index] = entry;
941
942 return true;
943 }
944
945 // Side-effects: populates the _local_interfaces field
946 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
947 const int itfs_len,
948 ConstantPool* const cp,
949 bool* const has_nonstatic_concrete_methods,
950 TRAPS) {
951 assert(stream != NULL, "invariant");
952 assert(cp != NULL, "invariant");
953 assert(has_nonstatic_concrete_methods != NULL, "invariant");
954
955 if (itfs_len == 0) {
956 _local_interfaces = Universe::the_empty_instance_klass_array();
957 } else {
958 assert(itfs_len > 0, "only called for len>0");
959 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
960
961 int index;
962 for (index = 0; index < itfs_len; index++) {
963 const u2 interface_index = stream->get_u2(CHECK);
964 Klass* interf;
965 check_property(
966 valid_klass_reference_at(interface_index),
967 "Interface name has bad constant pool index %u in class file %s",
968 interface_index, CHECK);
969 if (cp->tag_at(interface_index).is_klass()) {
970 interf = cp->resolved_klass_at(interface_index);
971 } else {
972 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
973
974 // Don't need to check legal name because it's checked when parsing constant pool.
975 // But need to make sure it's not an array type.
976 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
977 "Bad interface name in class file %s", CHECK);
978
979 // Call resolve_super so classcircularity is checked
980 interf = SystemDictionary::resolve_super_or_fail(
981 _class_name,
982 unresolved_klass,
983 Handle(THREAD, _loader_data->class_loader()),
984 _protection_domain,
985 false,
986 CHECK);
987 }
988
989 if (!interf->is_interface()) {
990 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
991 err_msg("class %s can not implement %s, because it is not an interface (%s)",
992 _class_name->as_klass_external_name(),
993 interf->external_name(),
994 interf->class_in_module_of_loader()));
995 }
996
997 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
998 *has_nonstatic_concrete_methods = true;
999 }
1000 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
1001 }
1002
1003 if (!_need_verify || itfs_len <= 1) {
1004 return;
1005 }
1006
1007 // Check if there's any duplicates in interfaces
1008 ResourceMark rm(THREAD);
1009 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1010 NameSigHash*,
1011 HASH_ROW_SIZE);
1012 initialize_hashtable(interface_names);
1013 bool dup = false;
1014 const Symbol* name = NULL;
1015 {
1016 debug_only(NoSafepointVerifier nsv;)
1017 for (index = 0; index < itfs_len; index++) {
1018 const InstanceKlass* const k = _local_interfaces->at(index);
1019 name = k->name();
1020 // If no duplicates, add (name, NULL) in hashtable interface_names.
1021 if (!put_after_lookup(name, NULL, interface_names)) {
1022 dup = true;
1023 break;
1024 }
1025 }
1026 }
1027 if (dup) {
1028 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
1029 name->as_C_string(), CHECK);
1030 }
1031 }
1032 }
1033
1034 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
1035 int constantvalue_index,
1036 int signature_index,
1037 TRAPS) const {
1038 // Make sure the constant pool entry is of a type appropriate to this field
1039 guarantee_property(
1040 (constantvalue_index > 0 &&
1041 constantvalue_index < cp->length()),
1042 "Bad initial value index %u in ConstantValue attribute in class file %s",
1043 constantvalue_index, CHECK);
1044
1045 const constantTag value_type = cp->tag_at(constantvalue_index);
1046 switch(cp->basic_type_for_signature_at(signature_index)) {
1047 case T_LONG: {
1048 guarantee_property(value_type.is_long(),
1049 "Inconsistent constant value type in class file %s",
1050 CHECK);
1051 break;
1052 }
1053 case T_FLOAT: {
1054 guarantee_property(value_type.is_float(),
1055 "Inconsistent constant value type in class file %s",
1056 CHECK);
1057 break;
1058 }
1059 case T_DOUBLE: {
1060 guarantee_property(value_type.is_double(),
1061 "Inconsistent constant value type in class file %s",
1062 CHECK);
1063 break;
1064 }
1065 case T_BYTE:
1066 case T_CHAR:
1067 case T_SHORT:
1068 case T_BOOLEAN:
1069 case T_INT: {
1070 guarantee_property(value_type.is_int(),
1071 "Inconsistent constant value type in class file %s",
1072 CHECK);
1073 break;
1074 }
1075 case T_OBJECT: {
1076 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1077 && value_type.is_string()),
1078 "Bad string initial value in class file %s",
1079 CHECK);
1080 break;
1081 }
1082 default: {
1083 classfile_parse_error("Unable to set initial value %u in class file %s",
1084 constantvalue_index,
1085 CHECK);
1086 }
1087 }
1088 }
1089
1090 class AnnotationCollector : public ResourceObj{
1091 public:
1092 enum Location { _in_field, _in_method, _in_class };
1093 enum ID {
1094 _unknown = 0,
1095 _method_CallerSensitive,
1096 _method_ForceInline,
1097 _method_DontInline,
1098 _method_InjectedProfile,
1099 _method_LambdaForm_Compiled,
1100 _method_Hidden,
1101 _method_HotSpotIntrinsicCandidate,
1102 _jdk_internal_vm_annotation_Contended,
1103 _field_Stable,
1104 _jdk_internal_vm_annotation_ReservedStackAccess,
1105 _annotation_LIMIT
1106 };
1107 const Location _location;
1108 int _annotations_present;
1109 u2 _contended_group;
1110
1111 AnnotationCollector(Location location)
1112 : _location(location), _annotations_present(0)
1113 {
1114 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1115 }
1116 // If this annotation name has an ID, report it (or _none).
1117 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1118 // Set the annotation name:
1119 void set_annotation(ID id) {
1120 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1121 _annotations_present |= nth_bit((int)id);
1122 }
1123
1124 void remove_annotation(ID id) {
1125 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1126 _annotations_present &= ~nth_bit((int)id);
1127 }
1128
1129 // Report if the annotation is present.
1130 bool has_any_annotations() const { return _annotations_present != 0; }
1131 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1132
1133 void set_contended_group(u2 group) { _contended_group = group; }
1134 u2 contended_group() const { return _contended_group; }
1135
1136 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1137
1138 void set_stable(bool stable) { set_annotation(_field_Stable); }
1139 bool is_stable() const { return has_annotation(_field_Stable); }
1140 };
1141
1142 // This class also doubles as a holder for metadata cleanup.
1143 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1144 private:
1145 ClassLoaderData* _loader_data;
1146 AnnotationArray* _field_annotations;
1147 AnnotationArray* _field_type_annotations;
1148 public:
1149 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1150 AnnotationCollector(_in_field),
1151 _loader_data(loader_data),
1152 _field_annotations(NULL),
1153 _field_type_annotations(NULL) {}
1154 ~FieldAnnotationCollector();
1155 void apply_to(FieldInfo* f);
1156 AnnotationArray* field_annotations() { return _field_annotations; }
1157 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1158
1159 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1160 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1161 };
1162
1163 class MethodAnnotationCollector : public AnnotationCollector{
1164 public:
1165 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1166 void apply_to(const methodHandle& m);
1167 };
1168
1169 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1170 public:
1171 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1172 void apply_to(InstanceKlass* ik);
1173 };
1174
1175
1176 static int skip_annotation_value(const u1*, int, int); // fwd decl
1177
1178 // Safely increment index by val if does not pass limit
1179 #define SAFE_ADD(index, limit, val) \
1180 if (index >= limit - val) return limit; \
1181 index += val;
1182
1183 // Skip an annotation. Return >=limit if there is any problem.
1184 static int skip_annotation(const u1* buffer, int limit, int index) {
1185 assert(buffer != NULL, "invariant");
1186 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1187 // value := switch (tag:u1) { ... }
1188 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1189 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1190 while (--nmem >= 0 && index < limit) {
1191 SAFE_ADD(index, limit, 2); // skip member
1192 index = skip_annotation_value(buffer, limit, index);
1193 }
1194 return index;
1195 }
1196
1197 // Skip an annotation value. Return >=limit if there is any problem.
1198 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1199 assert(buffer != NULL, "invariant");
1200
1201 // value := switch (tag:u1) {
1202 // case B, C, I, S, Z, D, F, J, c: con:u2;
1203 // case e: e_class:u2 e_name:u2;
1204 // case s: s_con:u2;
1205 // case [: do(nval:u2) {value};
1206 // case @: annotation;
1207 // case s: s_con:u2;
1208 // }
1209 SAFE_ADD(index, limit, 1); // read tag
1210 const u1 tag = buffer[index - 1];
1211 switch (tag) {
1212 case 'B':
1213 case 'C':
1214 case 'I':
1215 case 'S':
1216 case 'Z':
1217 case 'D':
1218 case 'F':
1219 case 'J':
1220 case 'c':
1221 case 's':
1222 SAFE_ADD(index, limit, 2); // skip con or s_con
1223 break;
1224 case 'e':
1225 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1226 break;
1227 case '[':
1228 {
1229 SAFE_ADD(index, limit, 2); // read nval
1230 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1231 while (--nval >= 0 && index < limit) {
1232 index = skip_annotation_value(buffer, limit, index);
1233 }
1234 }
1235 break;
1236 case '@':
1237 index = skip_annotation(buffer, limit, index);
1238 break;
1239 default:
1240 return limit; // bad tag byte
1241 }
1242 return index;
1243 }
1244
1245 // Sift through annotations, looking for those significant to the VM:
1246 static void parse_annotations(const ConstantPool* const cp,
1247 const u1* buffer, int limit,
1248 AnnotationCollector* coll,
1249 ClassLoaderData* loader_data,
1250 TRAPS) {
1251
1252 assert(cp != NULL, "invariant");
1253 assert(buffer != NULL, "invariant");
1254 assert(coll != NULL, "invariant");
1255 assert(loader_data != NULL, "invariant");
1256
1257 // annotations := do(nann:u2) {annotation}
1258 int index = 2; // read nann
1259 if (index >= limit) return;
1260 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1261 enum { // initial annotation layout
1262 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1263 count_off = 2, // u2 such as 1 (one value)
1264 member_off = 4, // utf8 such as 'value'
1265 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1266 e_tag_val = 'e',
1267 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1268 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1269 e_size = 11, // end of 'e' annotation
1270 c_tag_val = 'c', // payload is type
1271 c_con_off = 7, // utf8 payload, such as 'I'
1272 c_size = 9, // end of 'c' annotation
1273 s_tag_val = 's', // payload is String
1274 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1275 s_size = 9,
1276 min_size = 6 // smallest possible size (zero members)
1277 };
1278 // Cannot add min_size to index in case of overflow MAX_INT
1279 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1280 int index0 = index;
1281 index = skip_annotation(buffer, limit, index);
1282 const u1* const abase = buffer + index0;
1283 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1284 const int count = Bytes::get_Java_u2((address)abase + count_off);
1285 const Symbol* const aname = check_symbol_at(cp, atype);
1286 if (aname == NULL) break; // invalid annotation name
1287 const Symbol* member = NULL;
1288 if (count >= 1) {
1289 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1290 member = check_symbol_at(cp, member_index);
1291 if (member == NULL) break; // invalid member name
1292 }
1293
1294 // Here is where parsing particular annotations will take place.
1295 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1296 if (AnnotationCollector::_unknown == id) continue;
1297 coll->set_annotation(id);
1298
1299 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1300 // @Contended can optionally specify the contention group.
1301 //
1302 // Contended group defines the equivalence class over the fields:
1303 // the fields within the same contended group are not treated distinct.
1304 // The only exception is default group, which does not incur the
1305 // equivalence. Naturally, contention group for classes is meaningless.
1306 //
1307 // While the contention group is specified as String, annotation
1308 // values are already interned, and we might as well use the constant
1309 // pool index as the group tag.
1310 //
1311 u2 group_index = 0; // default contended group
1312 if (count == 1
1313 && s_size == (index - index0) // match size
1314 && s_tag_val == *(abase + tag_off)
1315 && member == vmSymbols::value_name()) {
1316 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1317 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1318 group_index = 0; // default contended group
1319 }
1320 }
1321 coll->set_contended_group(group_index);
1322 }
1323 }
1324 }
1325
1326
1327 // Parse attributes for a field.
1328 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1329 u2 attributes_count,
1330 bool is_static, u2 signature_index,
1331 u2* const constantvalue_index_addr,
1332 bool* const is_synthetic_addr,
1333 u2* const generic_signature_index_addr,
1334 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1335 TRAPS) {
1336 assert(cfs != NULL, "invariant");
1337 assert(constantvalue_index_addr != NULL, "invariant");
1338 assert(is_synthetic_addr != NULL, "invariant");
1339 assert(generic_signature_index_addr != NULL, "invariant");
1340 assert(parsed_annotations != NULL, "invariant");
1341 assert(attributes_count > 0, "attributes_count should be greater than 0");
1342
1343 u2 constantvalue_index = 0;
1344 u2 generic_signature_index = 0;
1345 bool is_synthetic = false;
1346 const u1* runtime_visible_annotations = NULL;
1347 int runtime_visible_annotations_length = 0;
1348 const u1* runtime_invisible_annotations = NULL;
1349 int runtime_invisible_annotations_length = 0;
1350 const u1* runtime_visible_type_annotations = NULL;
1351 int runtime_visible_type_annotations_length = 0;
1352 const u1* runtime_invisible_type_annotations = NULL;
1353 int runtime_invisible_type_annotations_length = 0;
1354 bool runtime_invisible_annotations_exists = false;
1355 bool runtime_invisible_type_annotations_exists = false;
1356 const ConstantPool* const cp = _cp;
1357
1358 while (attributes_count--) {
1359 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1360 const u2 attribute_name_index = cfs->get_u2_fast();
1361 const u4 attribute_length = cfs->get_u4_fast();
1362 check_property(valid_symbol_at(attribute_name_index),
1363 "Invalid field attribute index %u in class file %s",
1364 attribute_name_index,
1365 CHECK);
1366
1367 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1368 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1369 // ignore if non-static
1370 if (constantvalue_index != 0) {
1371 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1372 }
1373 check_property(
1374 attribute_length == 2,
1375 "Invalid ConstantValue field attribute length %u in class file %s",
1376 attribute_length, CHECK);
1377
1378 constantvalue_index = cfs->get_u2(CHECK);
1379 if (_need_verify) {
1380 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1381 }
1382 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1383 if (attribute_length != 0) {
1384 classfile_parse_error(
1385 "Invalid Synthetic field attribute length %u in class file %s",
1386 attribute_length, CHECK);
1387 }
1388 is_synthetic = true;
1389 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1390 if (attribute_length != 0) {
1391 classfile_parse_error(
1392 "Invalid Deprecated field attribute length %u in class file %s",
1393 attribute_length, CHECK);
1394 }
1395 } else if (_major_version >= JAVA_1_5_VERSION) {
1396 if (attribute_name == vmSymbols::tag_signature()) {
1397 if (generic_signature_index != 0) {
1398 classfile_parse_error(
1399 "Multiple Signature attributes for field in class file %s", CHECK);
1400 }
1401 if (attribute_length != 2) {
1402 classfile_parse_error(
1403 "Wrong size %u for field's Signature attribute in class file %s",
1404 attribute_length, CHECK);
1405 }
1406 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1407 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1408 if (runtime_visible_annotations != NULL) {
1409 classfile_parse_error(
1410 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1411 }
1412 runtime_visible_annotations_length = attribute_length;
1413 runtime_visible_annotations = cfs->current();
1414 assert(runtime_visible_annotations != NULL, "null visible annotations");
1415 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1416 parse_annotations(cp,
1417 runtime_visible_annotations,
1418 runtime_visible_annotations_length,
1419 parsed_annotations,
1420 _loader_data,
1421 CHECK);
1422 cfs->skip_u1_fast(runtime_visible_annotations_length);
1423 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1424 if (runtime_invisible_annotations_exists) {
1425 classfile_parse_error(
1426 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1427 }
1428 runtime_invisible_annotations_exists = true;
1429 if (PreserveAllAnnotations) {
1430 runtime_invisible_annotations_length = attribute_length;
1431 runtime_invisible_annotations = cfs->current();
1432 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1433 }
1434 cfs->skip_u1(attribute_length, CHECK);
1435 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1436 if (runtime_visible_type_annotations != NULL) {
1437 classfile_parse_error(
1438 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1439 }
1440 runtime_visible_type_annotations_length = attribute_length;
1441 runtime_visible_type_annotations = cfs->current();
1442 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1443 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1444 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1445 if (runtime_invisible_type_annotations_exists) {
1446 classfile_parse_error(
1447 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1448 } else {
1449 runtime_invisible_type_annotations_exists = true;
1450 }
1451 if (PreserveAllAnnotations) {
1452 runtime_invisible_type_annotations_length = attribute_length;
1453 runtime_invisible_type_annotations = cfs->current();
1454 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1455 }
1456 cfs->skip_u1(attribute_length, CHECK);
1457 } else {
1458 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1459 }
1460 } else {
1461 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1462 }
1463 }
1464
1465 *constantvalue_index_addr = constantvalue_index;
1466 *is_synthetic_addr = is_synthetic;
1467 *generic_signature_index_addr = generic_signature_index;
1468 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1469 runtime_visible_annotations_length,
1470 runtime_invisible_annotations,
1471 runtime_invisible_annotations_length,
1472 CHECK);
1473 parsed_annotations->set_field_annotations(a);
1474 a = assemble_annotations(runtime_visible_type_annotations,
1475 runtime_visible_type_annotations_length,
1476 runtime_invisible_type_annotations,
1477 runtime_invisible_type_annotations_length,
1478 CHECK);
1479 parsed_annotations->set_field_type_annotations(a);
1480 return;
1481 }
1482
1483
1484 // Field allocation types. Used for computing field offsets.
1485
1486 enum FieldAllocationType {
1487 STATIC_OOP, // Oops
1488 STATIC_BYTE, // Boolean, Byte, char
1489 STATIC_SHORT, // shorts
1490 STATIC_WORD, // ints
1491 STATIC_DOUBLE, // aligned long or double
1492 STATIC_FLATTENABLE, // flattenable field
1493 NONSTATIC_OOP,
1494 NONSTATIC_BYTE,
1495 NONSTATIC_SHORT,
1496 NONSTATIC_WORD,
1497 NONSTATIC_DOUBLE,
1498 NONSTATIC_FLATTENABLE,
1499 MAX_FIELD_ALLOCATION_TYPE,
1500 BAD_ALLOCATION_TYPE = -1
1501 };
1502
1503 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1504 BAD_ALLOCATION_TYPE, // 0
1505 BAD_ALLOCATION_TYPE, // 1
1506 BAD_ALLOCATION_TYPE, // 2
1507 BAD_ALLOCATION_TYPE, // 3
1508 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1509 NONSTATIC_SHORT, // T_CHAR = 5,
1510 NONSTATIC_WORD, // T_FLOAT = 6,
1511 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1512 NONSTATIC_BYTE, // T_BYTE = 8,
1513 NONSTATIC_SHORT, // T_SHORT = 9,
1514 NONSTATIC_WORD, // T_INT = 10,
1515 NONSTATIC_DOUBLE, // T_LONG = 11,
1516 NONSTATIC_OOP, // T_OBJECT = 12,
1517 NONSTATIC_OOP, // T_ARRAY = 13,
1518 NONSTATIC_OOP, // T_VALUETYPE = 14,
1519 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1520 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1521 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1522 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1523 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1524 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20,
1525 BAD_ALLOCATION_TYPE, // 0
1526 BAD_ALLOCATION_TYPE, // 1
1527 BAD_ALLOCATION_TYPE, // 2
1528 BAD_ALLOCATION_TYPE, // 3
1529 STATIC_BYTE , // T_BOOLEAN = 4,
1530 STATIC_SHORT, // T_CHAR = 5,
1531 STATIC_WORD, // T_FLOAT = 6,
1532 STATIC_DOUBLE, // T_DOUBLE = 7,
1533 STATIC_BYTE, // T_BYTE = 8,
1534 STATIC_SHORT, // T_SHORT = 9,
1535 STATIC_WORD, // T_INT = 10,
1536 STATIC_DOUBLE, // T_LONG = 11,
1537 STATIC_OOP, // T_OBJECT = 12,
1538 STATIC_OOP, // T_ARRAY = 13,
1539 STATIC_OOP, // T_VALUETYPE = 14,
1540 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1541 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1542 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1543 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1544 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1545 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20
1546 };
1547
1548 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type, bool is_flattenable) {
1549 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1550 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1551 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1552 if (is_flattenable) {
1553 result = is_static ? STATIC_FLATTENABLE : NONSTATIC_FLATTENABLE;
1554 }
1555 return result;
1556 }
1557
1558 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1559 public:
1560 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1561
1562 FieldAllocationCount() {
1563 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1564 count[i] = 0;
1565 }
1566 }
1567
1568 FieldAllocationType update(bool is_static, BasicType type, bool is_flattenable) {
1569 FieldAllocationType atype = basic_type_to_atype(is_static, type, is_flattenable);
1570 if (atype != BAD_ALLOCATION_TYPE) {
1571 // Make sure there is no overflow with injected fields.
1572 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1573 count[atype]++;
1574 }
1575 return atype;
1576 }
1577 };
1578
1579 // Side-effects: populates the _fields, _fields_annotations,
1580 // _fields_type_annotations fields
1581 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1582 bool is_interface,
1583 bool is_value_type,
1584 FieldAllocationCount* const fac,
1585 ConstantPool* cp,
1586 const int cp_size,
1587 u2* const java_fields_count_ptr,
1588 TRAPS) {
1589
1590 assert(cfs != NULL, "invariant");
1591 assert(fac != NULL, "invariant");
1592 assert(cp != NULL, "invariant");
1593 assert(java_fields_count_ptr != NULL, "invariant");
1594
1595 assert(NULL == _fields, "invariant");
1596 assert(NULL == _fields_annotations, "invariant");
1597 assert(NULL == _fields_type_annotations, "invariant");
1598
1599 cfs->guarantee_more(2, CHECK); // length
1600 const u2 length = cfs->get_u2_fast();
1601 *java_fields_count_ptr = length;
1602
1603 int num_injected = 0;
1604 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1605 &num_injected);
1606
1607 // two more slots are required for inline classes:
1608 // one for the static field with a reference to the pre-allocated default value
1609 // one for the field the JVM injects when detecting an empty inline class
1610 const int total_fields = length + num_injected + (is_value_type ? 2 : 0);
1611
1612 // The field array starts with tuples of shorts
1613 // [access, name index, sig index, initial value index, byte offset].
1614 // A generic signature slot only exists for field with generic
1615 // signature attribute. And the access flag is set with
1616 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1617 // signature slots are at the end of the field array and after all
1618 // other fields data.
1619 //
1620 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1621 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1622 // ...
1623 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1624 // [generic signature index]
1625 // [generic signature index]
1626 // ...
1627 //
1628 // Allocate a temporary resource array for field data. For each field,
1629 // a slot is reserved in the temporary array for the generic signature
1630 // index. After parsing all fields, the data are copied to a permanent
1631 // array and any unused slots will be discarded.
1632 ResourceMark rm(THREAD);
1633 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1634 u2,
1635 total_fields * (FieldInfo::field_slots + 1));
1636
1637 // The generic signature slots start after all other fields' data.
1638 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1639 int num_generic_signature = 0;
1640 int instance_fields_count = 0;
1641 for (int n = 0; n < length; n++) {
1642 // access_flags, name_index, descriptor_index, attributes_count
1643 cfs->guarantee_more(8, CHECK);
1644
1645 jint recognized_modifiers = JVM_RECOGNIZED_FIELD_MODIFIERS;
1646
1647 const jint flags = cfs->get_u2_fast() & recognized_modifiers;
1648 verify_legal_field_modifiers(flags, is_interface, is_value_type, CHECK);
1649 AccessFlags access_flags;
1650 access_flags.set_flags(flags);
1651
1652 const u2 name_index = cfs->get_u2_fast();
1653 check_property(valid_symbol_at(name_index),
1654 "Invalid constant pool index %u for field name in class file %s",
1655 name_index, CHECK);
1656 const Symbol* const name = cp->symbol_at(name_index);
1657 verify_legal_field_name(name, CHECK);
1658
1659 const u2 signature_index = cfs->get_u2_fast();
1660 check_property(valid_symbol_at(signature_index),
1661 "Invalid constant pool index %u for field signature in class file %s",
1662 signature_index, CHECK);
1663 const Symbol* const sig = cp->symbol_at(signature_index);
1664 verify_legal_field_signature(name, sig, CHECK);
1665 assert(!access_flags.is_flattenable(), "ACC_FLATTENABLE should have been filtered out");
1666 if (sig->is_Q_signature()) {
1667 // assert(_major_version >= CONSTANT_CLASS_DESCRIPTORS, "Q-descriptors are only supported in recent classfiles");
1668 access_flags.set_is_flattenable();
1669 }
1670 if (access_flags.is_flattenable()) {
1671 // Array flattenability cannot be specified. Arrays of value classes are
1672 // are always flattenable. Arrays of other classes are not flattenable.
1673 if (sig->utf8_length() > 1 && sig->char_at(0) == '[') {
1674 classfile_parse_error(
1675 "Field \"%s\" with signature \"%s\" in class file %s is invalid."
1676 " ACC_FLATTENABLE cannot be specified for an array",
1677 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1678 }
1679 _has_flattenable_fields = true;
1680 }
1681 if (!access_flags.is_static()) instance_fields_count++;
1682
1683 u2 constantvalue_index = 0;
1684 bool is_synthetic = false;
1685 u2 generic_signature_index = 0;
1686 const bool is_static = access_flags.is_static();
1687 FieldAnnotationCollector parsed_annotations(_loader_data);
1688
1689 const u2 attributes_count = cfs->get_u2_fast();
1690 if (attributes_count > 0) {
1691 parse_field_attributes(cfs,
1692 attributes_count,
1693 is_static,
1694 signature_index,
1695 &constantvalue_index,
1696 &is_synthetic,
1697 &generic_signature_index,
1698 &parsed_annotations,
1699 CHECK);
1700
1701 if (parsed_annotations.field_annotations() != NULL) {
1702 if (_fields_annotations == NULL) {
1703 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1704 _loader_data, length, NULL,
1705 CHECK);
1706 }
1707 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1708 parsed_annotations.set_field_annotations(NULL);
1709 }
1710 if (parsed_annotations.field_type_annotations() != NULL) {
1711 if (_fields_type_annotations == NULL) {
1712 _fields_type_annotations =
1713 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1714 length,
1715 NULL,
1716 CHECK);
1717 }
1718 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1719 parsed_annotations.set_field_type_annotations(NULL);
1720 }
1721
1722 if (is_synthetic) {
1723 access_flags.set_is_synthetic();
1724 }
1725 if (generic_signature_index != 0) {
1726 access_flags.set_field_has_generic_signature();
1727 fa[generic_signature_slot] = generic_signature_index;
1728 generic_signature_slot ++;
1729 num_generic_signature ++;
1730 }
1731 }
1732
1733 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1734 field->initialize(access_flags.as_short(),
1735 name_index,
1736 signature_index,
1737 constantvalue_index);
1738 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1739
1740 // Remember how many oops we encountered and compute allocation type
1741 const FieldAllocationType atype = fac->update(is_static, type, access_flags.is_flattenable());
1742 field->set_allocation_type(atype);
1743
1744 // After field is initialized with type, we can augment it with aux info
1745 if (parsed_annotations.has_any_annotations()) {
1746 parsed_annotations.apply_to(field);
1747 if (field->is_contended()) {
1748 _has_contended_fields = true;
1749 }
1750 }
1751 }
1752
1753 int index = length;
1754 if (num_injected != 0) {
1755 for (int n = 0; n < num_injected; n++) {
1756 // Check for duplicates
1757 if (injected[n].may_be_java) {
1758 const Symbol* const name = injected[n].name();
1759 const Symbol* const signature = injected[n].signature();
1760 bool duplicate = false;
1761 for (int i = 0; i < length; i++) {
1762 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1763 if (name == cp->symbol_at(f->name_index()) &&
1764 signature == cp->symbol_at(f->signature_index())) {
1765 // Symbol is desclared in Java so skip this one
1766 duplicate = true;
1767 break;
1768 }
1769 }
1770 if (duplicate) {
1771 // These will be removed from the field array at the end
1772 continue;
1773 }
1774 }
1775
1776 // Injected field
1777 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1778 field->initialize(JVM_ACC_FIELD_INTERNAL,
1779 injected[n].name_index,
1780 injected[n].signature_index,
1781 0);
1782
1783 const BasicType type = Signature::basic_type(injected[n].signature());
1784
1785 // Remember how many oops we encountered and compute allocation type
1786 const FieldAllocationType atype = fac->update(false, type, false);
1787 field->set_allocation_type(atype);
1788 index++;
1789 }
1790 }
1791
1792 if (is_value_type) {
1793 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1794 field->initialize(JVM_ACC_FIELD_INTERNAL | JVM_ACC_STATIC,
1795 vmSymbols::default_value_name_enum,
1796 vmSymbols::object_signature_enum,
1797 0);
1798 const BasicType type = Signature::basic_type(vmSymbols::object_signature());
1799 const FieldAllocationType atype = fac->update(true, type, false);
1800 field->set_allocation_type(atype);
1801 index++;
1802 }
1803
1804 if (is_value_type && instance_fields_count == 0) {
1805 _is_empty_value = true;
1806 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1807 field->initialize(JVM_ACC_FIELD_INTERNAL,
1808 vmSymbols::empty_marker_name_enum,
1809 vmSymbols::byte_signature_enum,
1810 0);
1811 const BasicType type = Signature::basic_type(vmSymbols::byte_signature());
1812 const FieldAllocationType atype = fac->update(false, type, false);
1813 field->set_allocation_type(atype);
1814 index++;
1815 }
1816
1817 assert(NULL == _fields, "invariant");
1818
1819 _fields =
1820 MetadataFactory::new_array<u2>(_loader_data,
1821 index * FieldInfo::field_slots + num_generic_signature,
1822 CHECK);
1823 // Sometimes injected fields already exist in the Java source so
1824 // the fields array could be too long. In that case the
1825 // fields array is trimed. Also unused slots that were reserved
1826 // for generic signature indexes are discarded.
1827 {
1828 int i = 0;
1829 for (; i < index * FieldInfo::field_slots; i++) {
1830 _fields->at_put(i, fa[i]);
1831 }
1832 for (int j = total_fields * FieldInfo::field_slots;
1833 j < generic_signature_slot; j++) {
1834 _fields->at_put(i++, fa[j]);
1835 }
1836 assert(_fields->length() == i, "");
1837 }
1838
1839 if (_need_verify && length > 1) {
1840 // Check duplicated fields
1841 ResourceMark rm(THREAD);
1842 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1843 THREAD, NameSigHash*, HASH_ROW_SIZE);
1844 initialize_hashtable(names_and_sigs);
1845 bool dup = false;
1846 const Symbol* name = NULL;
1847 const Symbol* sig = NULL;
1848 {
1849 debug_only(NoSafepointVerifier nsv;)
1850 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1851 name = fs.name();
1852 sig = fs.signature();
1853 // If no duplicates, add name/signature in hashtable names_and_sigs.
1854 if (!put_after_lookup(name, sig, names_and_sigs)) {
1855 dup = true;
1856 break;
1857 }
1858 }
1859 }
1860 if (dup) {
1861 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1862 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1863 }
1864 }
1865 }
1866
1867
1868 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1869 u4 code_length,
1870 u4 exception_table_length,
1871 TRAPS) {
1872 assert(cfs != NULL, "invariant");
1873
1874 const unsafe_u2* const exception_table_start = cfs->current();
1875 assert(exception_table_start != NULL, "null exception table");
1876
1877 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1878 // end_pc,
1879 // handler_pc,
1880 // catch_type_index
1881
1882 // Will check legal target after parsing code array in verifier.
1883 if (_need_verify) {
1884 for (unsigned int i = 0; i < exception_table_length; i++) {
1885 const u2 start_pc = cfs->get_u2_fast();
1886 const u2 end_pc = cfs->get_u2_fast();
1887 const u2 handler_pc = cfs->get_u2_fast();
1888 const u2 catch_type_index = cfs->get_u2_fast();
1889 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1890 "Illegal exception table range in class file %s",
1891 CHECK_NULL);
1892 guarantee_property(handler_pc < code_length,
1893 "Illegal exception table handler in class file %s",
1894 CHECK_NULL);
1895 if (catch_type_index != 0) {
1896 guarantee_property(valid_klass_reference_at(catch_type_index),
1897 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1898 }
1899 }
1900 } else {
1901 cfs->skip_u2_fast(exception_table_length * 4);
1902 }
1903 return exception_table_start;
1904 }
1905
1906 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1907 u4 code_length,
1908 CompressedLineNumberWriteStream**const write_stream,
1909 TRAPS) {
1910
1911 const ClassFileStream* const cfs = _stream;
1912 unsigned int num_entries = cfs->get_u2(CHECK);
1913
1914 // Each entry is a u2 start_pc, and a u2 line_number
1915 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1916
1917 // Verify line number attribute and table length
1918 check_property(
1919 code_attribute_length == sizeof(u2) + length_in_bytes,
1920 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1921
1922 cfs->guarantee_more(length_in_bytes, CHECK);
1923
1924 if ((*write_stream) == NULL) {
1925 if (length_in_bytes > fixed_buffer_size) {
1926 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1927 } else {
1928 (*write_stream) = new CompressedLineNumberWriteStream(
1929 _linenumbertable_buffer, fixed_buffer_size);
1930 }
1931 }
1932
1933 while (num_entries-- > 0) {
1934 const u2 bci = cfs->get_u2_fast(); // start_pc
1935 const u2 line = cfs->get_u2_fast(); // line_number
1936 guarantee_property(bci < code_length,
1937 "Invalid pc in LineNumberTable in class file %s", CHECK);
1938 (*write_stream)->write_pair(bci, line);
1939 }
1940 }
1941
1942
1943 class LVT_Hash : public AllStatic {
1944 public:
1945
1946 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1947 /*
1948 * 3-tuple start_bci/length/slot has to be unique key,
1949 * so the following comparison seems to be redundant:
1950 * && elem->name_cp_index == entry->_elem->name_cp_index
1951 */
1952 return (e0.start_bci == e1.start_bci &&
1953 e0.length == e1.length &&
1954 e0.name_cp_index == e1.name_cp_index &&
1955 e0.slot == e1.slot);
1956 }
1957
1958 static unsigned int hash(LocalVariableTableElement const& e0) {
1959 unsigned int raw_hash = e0.start_bci;
1960
1961 raw_hash = e0.length + raw_hash * 37;
1962 raw_hash = e0.name_cp_index + raw_hash * 37;
1963 raw_hash = e0.slot + raw_hash * 37;
1964
1965 return raw_hash;
1966 }
1967 };
1968
1969
1970 // Class file LocalVariableTable elements.
1971 class Classfile_LVT_Element {
1972 public:
1973 u2 start_bci;
1974 u2 length;
1975 u2 name_cp_index;
1976 u2 descriptor_cp_index;
1977 u2 slot;
1978 };
1979
1980 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1981 LocalVariableTableElement* const lvt) {
1982 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1983 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1984 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1985 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1986 lvt->signature_cp_index = 0;
1987 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1988 }
1989
1990 // Function is used to parse both attributes:
1991 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1992 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1993 u4 code_length,
1994 u2 max_locals,
1995 u4 code_attribute_length,
1996 u2* const localvariable_table_length,
1997 bool isLVTT,
1998 TRAPS) {
1999 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
2000 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
2001 const unsigned int size =
2002 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
2003
2004 const ConstantPool* const cp = _cp;
2005
2006 // Verify local variable table attribute has right length
2007 if (_need_verify) {
2008 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
2009 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
2010 }
2011
2012 const unsafe_u2* const localvariable_table_start = cfs->current();
2013 assert(localvariable_table_start != NULL, "null local variable table");
2014 if (!_need_verify) {
2015 cfs->skip_u2_fast(size);
2016 } else {
2017 cfs->guarantee_more(size * 2, CHECK_NULL);
2018 for(int i = 0; i < (*localvariable_table_length); i++) {
2019 const u2 start_pc = cfs->get_u2_fast();
2020 const u2 length = cfs->get_u2_fast();
2021 const u2 name_index = cfs->get_u2_fast();
2022 const u2 descriptor_index = cfs->get_u2_fast();
2023 const u2 index = cfs->get_u2_fast();
2024 // Assign to a u4 to avoid overflow
2025 const u4 end_pc = (u4)start_pc + (u4)length;
2026
2027 if (start_pc >= code_length) {
2028 classfile_parse_error(
2029 "Invalid start_pc %u in %s in class file %s",
2030 start_pc, tbl_name, CHECK_NULL);
2031 }
2032 if (end_pc > code_length) {
2033 classfile_parse_error(
2034 "Invalid length %u in %s in class file %s",
2035 length, tbl_name, CHECK_NULL);
2036 }
2037 const int cp_size = cp->length();
2038 guarantee_property(valid_symbol_at(name_index),
2039 "Name index %u in %s has bad constant type in class file %s",
2040 name_index, tbl_name, CHECK_NULL);
2041 guarantee_property(valid_symbol_at(descriptor_index),
2042 "Signature index %u in %s has bad constant type in class file %s",
2043 descriptor_index, tbl_name, CHECK_NULL);
2044
2045 const Symbol* const name = cp->symbol_at(name_index);
2046 const Symbol* const sig = cp->symbol_at(descriptor_index);
2047 verify_legal_field_name(name, CHECK_NULL);
2048 u2 extra_slot = 0;
2049 if (!isLVTT) {
2050 verify_legal_field_signature(name, sig, CHECK_NULL);
2051
2052 // 4894874: check special cases for double and long local variables
2053 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
2054 sig == vmSymbols::type_signature(T_LONG)) {
2055 extra_slot = 1;
2056 }
2057 }
2058 guarantee_property((index + extra_slot) < max_locals,
2059 "Invalid index %u in %s in class file %s",
2060 index, tbl_name, CHECK_NULL);
2061 }
2062 }
2063 return localvariable_table_start;
2064 }
2065
2066 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
2067 u4 code_attribute_length,
2068 bool need_verify,
2069 TRAPS) {
2070 assert(cfs != NULL, "invariant");
2071
2072 if (0 == code_attribute_length) {
2073 return NULL;
2074 }
2075
2076 const u1* const stackmap_table_start = cfs->current();
2077 assert(stackmap_table_start != NULL, "null stackmap table");
2078
2079 // check code_attribute_length first
2080 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2081
2082 if (!need_verify && !DumpSharedSpaces) {
2083 return NULL;
2084 }
2085 return stackmap_table_start;
2086 }
2087
2088 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2089 u2* const checked_exceptions_length,
2090 u4 method_attribute_length,
2091 TRAPS) {
2092 assert(cfs != NULL, "invariant");
2093 assert(checked_exceptions_length != NULL, "invariant");
2094
2095 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2096 *checked_exceptions_length = cfs->get_u2_fast();
2097 const unsigned int size =
2098 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2099 const unsafe_u2* const checked_exceptions_start = cfs->current();
2100 assert(checked_exceptions_start != NULL, "null checked exceptions");
2101 if (!_need_verify) {
2102 cfs->skip_u2_fast(size);
2103 } else {
2104 // Verify each value in the checked exception table
2105 u2 checked_exception;
2106 const u2 len = *checked_exceptions_length;
2107 cfs->guarantee_more(2 * len, CHECK_NULL);
2108 for (int i = 0; i < len; i++) {
2109 checked_exception = cfs->get_u2_fast();
2110 check_property(
2111 valid_klass_reference_at(checked_exception),
2112 "Exception name has bad type at constant pool %u in class file %s",
2113 checked_exception, CHECK_NULL);
2114 }
2115 }
2116 // check exceptions attribute length
2117 if (_need_verify) {
2118 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2119 sizeof(u2) * size),
2120 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2121 }
2122 return checked_exceptions_start;
2123 }
2124
2125 void ClassFileParser::throwIllegalSignature(const char* type,
2126 const Symbol* name,
2127 const Symbol* sig,
2128 TRAPS) const {
2129 assert(name != NULL, "invariant");
2130 assert(sig != NULL, "invariant");
2131
2132 const char* class_note = "";
2133 if (is_value_type() && name == vmSymbols::object_initializer_name()) {
2134 class_note = " (an inline class)";
2135 }
2136
2137 ResourceMark rm(THREAD);
2138 Exceptions::fthrow(THREAD_AND_LOCATION,
2139 vmSymbols::java_lang_ClassFormatError(),
2140 "%s \"%s\" in class %s%s has illegal signature \"%s\"", type,
2141 name->as_C_string(), _class_name->as_C_string(), class_note, sig->as_C_string());
2142 }
2143
2144 AnnotationCollector::ID
2145 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2146 const Symbol* name) {
2147 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2148 // Privileged code can use all annotations. Other code silently drops some.
2149 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2150 loader_data->is_platform_class_loader_data() ||
2151 loader_data->is_unsafe_anonymous();
2152 switch (sid) {
2153 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2154 if (_location != _in_method) break; // only allow for methods
2155 if (!privileged) break; // only allow in privileged code
2156 return _method_CallerSensitive;
2157 }
2158 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2159 if (_location != _in_method) break; // only allow for methods
2160 if (!privileged) break; // only allow in privileged code
2161 return _method_ForceInline;
2162 }
2163 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2164 if (_location != _in_method) break; // only allow for methods
2165 if (!privileged) break; // only allow in privileged code
2166 return _method_DontInline;
2167 }
2168 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2169 if (_location != _in_method) break; // only allow for methods
2170 if (!privileged) break; // only allow in privileged code
2171 return _method_InjectedProfile;
2172 }
2173 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2174 if (_location != _in_method) break; // only allow for methods
2175 if (!privileged) break; // only allow in privileged code
2176 return _method_LambdaForm_Compiled;
2177 }
2178 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2179 if (_location != _in_method) break; // only allow for methods
2180 if (!privileged) break; // only allow in privileged code
2181 return _method_Hidden;
2182 }
2183 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2184 if (_location != _in_method) break; // only allow for methods
2185 if (!privileged) break; // only allow in privileged code
2186 return _method_HotSpotIntrinsicCandidate;
2187 }
2188 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2189 if (_location != _in_field) break; // only allow for fields
2190 if (!privileged) break; // only allow in privileged code
2191 return _field_Stable;
2192 }
2193 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2194 if (_location != _in_field && _location != _in_class) {
2195 break; // only allow for fields and classes
2196 }
2197 if (!EnableContended || (RestrictContended && !privileged)) {
2198 break; // honor privileges
2199 }
2200 return _jdk_internal_vm_annotation_Contended;
2201 }
2202 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2203 if (_location != _in_method) break; // only allow for methods
2204 if (RestrictReservedStack && !privileged) break; // honor privileges
2205 return _jdk_internal_vm_annotation_ReservedStackAccess;
2206 }
2207 default: {
2208 break;
2209 }
2210 }
2211 return AnnotationCollector::_unknown;
2212 }
2213
2214 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2215 if (is_contended())
2216 f->set_contended_group(contended_group());
2217 if (is_stable())
2218 f->set_stable(true);
2219 }
2220
2221 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2222 // If there's an error deallocate metadata for field annotations
2223 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2224 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2225 }
2226
2227 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2228 if (has_annotation(_method_CallerSensitive))
2229 m->set_caller_sensitive(true);
2230 if (has_annotation(_method_ForceInline))
2231 m->set_force_inline(true);
2232 if (has_annotation(_method_DontInline))
2233 m->set_dont_inline(true);
2234 if (has_annotation(_method_InjectedProfile))
2235 m->set_has_injected_profile(true);
2236 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2237 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2238 if (has_annotation(_method_Hidden))
2239 m->set_hidden(true);
2240 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2241 m->set_intrinsic_candidate(true);
2242 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2243 m->set_has_reserved_stack_access(true);
2244 }
2245
2246 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2247 assert(ik != NULL, "invariant");
2248 ik->set_is_contended(is_contended());
2249 }
2250
2251 #define MAX_ARGS_SIZE 255
2252 #define MAX_CODE_SIZE 65535
2253 #define INITIAL_MAX_LVT_NUMBER 256
2254
2255 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2256 *
2257 * Rules for LVT's and LVTT's are:
2258 * - There can be any number of LVT's and LVTT's.
2259 * - If there are n LVT's, it is the same as if there was just
2260 * one LVT containing all the entries from the n LVT's.
2261 * - There may be no more than one LVT entry per local variable.
2262 * Two LVT entries are 'equal' if these fields are the same:
2263 * start_pc, length, name, slot
2264 * - There may be no more than one LVTT entry per each LVT entry.
2265 * Each LVTT entry has to match some LVT entry.
2266 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2267 */
2268 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2269 int lvt_cnt,
2270 u2* const localvariable_table_length,
2271 const unsafe_u2** const localvariable_table_start,
2272 int lvtt_cnt,
2273 u2* const localvariable_type_table_length,
2274 const unsafe_u2** const localvariable_type_table_start,
2275 TRAPS) {
2276
2277 ResourceMark rm(THREAD);
2278
2279 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2280 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2281
2282 LVT_HashTable* const table = new LVT_HashTable();
2283
2284 // To fill LocalVariableTable in
2285 const Classfile_LVT_Element* cf_lvt;
2286 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2287
2288 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2289 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2290 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2291 copy_lvt_element(&cf_lvt[idx], lvt);
2292 // If no duplicates, add LVT elem in hashtable.
2293 if (table->put(*lvt, lvt) == false
2294 && _need_verify
2295 && _major_version >= JAVA_1_5_VERSION) {
2296 classfile_parse_error("Duplicated LocalVariableTable attribute "
2297 "entry for '%s' in class file %s",
2298 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2299 CHECK);
2300 }
2301 }
2302 }
2303
2304 // To merge LocalVariableTable and LocalVariableTypeTable
2305 const Classfile_LVT_Element* cf_lvtt;
2306 LocalVariableTableElement lvtt_elem;
2307
2308 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2309 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2310 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2311 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2312 LocalVariableTableElement** entry = table->get(lvtt_elem);
2313 if (entry == NULL) {
2314 if (_need_verify) {
2315 classfile_parse_error("LVTT entry for '%s' in class file %s "
2316 "does not match any LVT entry",
2317 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2318 CHECK);
2319 }
2320 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2321 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2322 "entry for '%s' in class file %s",
2323 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2324 CHECK);
2325 } else {
2326 // to add generic signatures into LocalVariableTable
2327 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2328 }
2329 }
2330 }
2331 }
2332
2333
2334 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2335 const u1* runtime_visible_annotations,
2336 int runtime_visible_annotations_length,
2337 const u1* runtime_invisible_annotations,
2338 int runtime_invisible_annotations_length,
2339 const u1* runtime_visible_parameter_annotations,
2340 int runtime_visible_parameter_annotations_length,
2341 const u1* runtime_invisible_parameter_annotations,
2342 int runtime_invisible_parameter_annotations_length,
2343 const u1* runtime_visible_type_annotations,
2344 int runtime_visible_type_annotations_length,
2345 const u1* runtime_invisible_type_annotations,
2346 int runtime_invisible_type_annotations_length,
2347 const u1* annotation_default,
2348 int annotation_default_length,
2349 TRAPS) {
2350
2351 AnnotationArray* a;
2352
2353 if (runtime_visible_annotations_length +
2354 runtime_invisible_annotations_length > 0) {
2355 a = assemble_annotations(runtime_visible_annotations,
2356 runtime_visible_annotations_length,
2357 runtime_invisible_annotations,
2358 runtime_invisible_annotations_length,
2359 CHECK);
2360 cm->set_method_annotations(a);
2361 }
2362
2363 if (runtime_visible_parameter_annotations_length +
2364 runtime_invisible_parameter_annotations_length > 0) {
2365 a = assemble_annotations(runtime_visible_parameter_annotations,
2366 runtime_visible_parameter_annotations_length,
2367 runtime_invisible_parameter_annotations,
2368 runtime_invisible_parameter_annotations_length,
2369 CHECK);
2370 cm->set_parameter_annotations(a);
2371 }
2372
2373 if (annotation_default_length > 0) {
2374 a = assemble_annotations(annotation_default,
2375 annotation_default_length,
2376 NULL,
2377 0,
2378 CHECK);
2379 cm->set_default_annotations(a);
2380 }
2381
2382 if (runtime_visible_type_annotations_length +
2383 runtime_invisible_type_annotations_length > 0) {
2384 a = assemble_annotations(runtime_visible_type_annotations,
2385 runtime_visible_type_annotations_length,
2386 runtime_invisible_type_annotations,
2387 runtime_invisible_type_annotations_length,
2388 CHECK);
2389 cm->set_type_annotations(a);
2390 }
2391 }
2392
2393
2394 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2395 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2396 // Method* to save footprint, so we only know the size of the resulting Method* when the
2397 // entire method attribute is parsed.
2398 //
2399 // The promoted_flags parameter is used to pass relevant access_flags
2400 // from the method back up to the containing klass. These flag values
2401 // are added to klass's access_flags.
2402
2403 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2404 bool is_interface,
2405 bool is_value_type,
2406 const ConstantPool* cp,
2407 AccessFlags* const promoted_flags,
2408 TRAPS) {
2409 assert(cfs != NULL, "invariant");
2410 assert(cp != NULL, "invariant");
2411 assert(promoted_flags != NULL, "invariant");
2412
2413 ResourceMark rm(THREAD);
2414 // Parse fixed parts:
2415 // access_flags, name_index, descriptor_index, attributes_count
2416 cfs->guarantee_more(8, CHECK_NULL);
2417
2418 int flags = cfs->get_u2_fast();
2419 const u2 name_index = cfs->get_u2_fast();
2420 const int cp_size = cp->length();
2421 check_property(
2422 valid_symbol_at(name_index),
2423 "Illegal constant pool index %u for method name in class file %s",
2424 name_index, CHECK_NULL);
2425 const Symbol* const name = cp->symbol_at(name_index);
2426 verify_legal_method_name(name, CHECK_NULL);
2427
2428 const u2 signature_index = cfs->get_u2_fast();
2429 guarantee_property(
2430 valid_symbol_at(signature_index),
2431 "Illegal constant pool index %u for method signature in class file %s",
2432 signature_index, CHECK_NULL);
2433 const Symbol* const signature = cp->symbol_at(signature_index);
2434
2435 if (name == vmSymbols::class_initializer_name()) {
2436 // We ignore the other access flags for a valid class initializer.
2437 // (JVM Spec 2nd ed., chapter 4.6)
2438 if (_major_version < 51) { // backward compatibility
2439 flags = JVM_ACC_STATIC;
2440 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2441 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2442 } else {
2443 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2444 }
2445 } else {
2446 verify_legal_method_modifiers(flags, is_interface, is_value_type, name, CHECK_NULL);
2447 }
2448
2449 if (name == vmSymbols::object_initializer_name()) {
2450 if (is_interface) {
2451 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2452 } else if (!is_value_type && signature->is_void_method_signature()) {
2453 // OK, a constructor
2454 } else if (is_value_type && !signature->is_void_method_signature()) {
2455 // also OK, a static factory, as long as the return value is good
2456 bool ok = false;
2457 SignatureStream ss((Symbol*) signature, true);
2458 while (!ss.at_return_type()) ss.next();
2459 if (ss.is_reference()) {
2460 Symbol* ret = ss.as_symbol();
2461 const Symbol* required = class_name();
2462 if (is_unsafe_anonymous()) {
2463 // The original class name in the UAC byte stream gets changed. So
2464 // using the original name in the return type is no longer valid.
2465 required = vmSymbols::java_lang_Object();
2466 }
2467 ok = (ret == required);
2468 }
2469 if (!ok) {
2470 throwIllegalSignature("Method", name, signature, CHECK_0);
2471 }
2472 } else {
2473 // not OK, so throw the same error as in verify_legal_method_signature.
2474 throwIllegalSignature("Method", name, signature, CHECK_0);
2475 }
2476 // A declared <init> method must always be either a non-static
2477 // object constructor, with a void return, or else it must be a
2478 // static factory method, with a non-void return. No other
2479 // definition of <init> is possible.
2480 //
2481 // The verifier (in verify_invoke_instructions) will inspect the
2482 // signature of any attempt to invoke <init>, and ensures that it
2483 // returns non-void if and only if it is being invoked by
2484 // invokestatic, and void if and only if it is being invoked by
2485 // invokespecial.
2486 //
2487 // When a symbolic reference to <init> is resolved for a
2488 // particular invocation mode (special or static), the mode is
2489 // matched to the JVM_ACC_STATIC modifier of the <init> method.
2490 // Thus, it is impossible to statically invoke a constructor, and
2491 // impossible to "new + invokespecial" a static factory, either
2492 // through bytecode or through reflection.
2493 }
2494
2495 int args_size = -1; // only used when _need_verify is true
2496 if (_need_verify) {
2497 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2498 verify_legal_method_signature(name, signature, CHECK_NULL);
2499 if (args_size > MAX_ARGS_SIZE) {
2500 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2501 }
2502 }
2503
2504 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2505
2506 // Default values for code and exceptions attribute elements
2507 u2 max_stack = 0;
2508 u2 max_locals = 0;
2509 u4 code_length = 0;
2510 const u1* code_start = 0;
2511 u2 exception_table_length = 0;
2512 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2513 Array<int>* exception_handlers = Universe::the_empty_int_array();
2514 u2 checked_exceptions_length = 0;
2515 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2516 CompressedLineNumberWriteStream* linenumber_table = NULL;
2517 int linenumber_table_length = 0;
2518 int total_lvt_length = 0;
2519 u2 lvt_cnt = 0;
2520 u2 lvtt_cnt = 0;
2521 bool lvt_allocated = false;
2522 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2523 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2524 u2* localvariable_table_length = NULL;
2525 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2526 u2* localvariable_type_table_length = NULL;
2527 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2528 int method_parameters_length = -1;
2529 const u1* method_parameters_data = NULL;
2530 bool method_parameters_seen = false;
2531 bool parsed_code_attribute = false;
2532 bool parsed_checked_exceptions_attribute = false;
2533 bool parsed_stackmap_attribute = false;
2534 // stackmap attribute - JDK1.5
2535 const u1* stackmap_data = NULL;
2536 int stackmap_data_length = 0;
2537 u2 generic_signature_index = 0;
2538 MethodAnnotationCollector parsed_annotations;
2539 const u1* runtime_visible_annotations = NULL;
2540 int runtime_visible_annotations_length = 0;
2541 const u1* runtime_invisible_annotations = NULL;
2542 int runtime_invisible_annotations_length = 0;
2543 const u1* runtime_visible_parameter_annotations = NULL;
2544 int runtime_visible_parameter_annotations_length = 0;
2545 const u1* runtime_invisible_parameter_annotations = NULL;
2546 int runtime_invisible_parameter_annotations_length = 0;
2547 const u1* runtime_visible_type_annotations = NULL;
2548 int runtime_visible_type_annotations_length = 0;
2549 const u1* runtime_invisible_type_annotations = NULL;
2550 int runtime_invisible_type_annotations_length = 0;
2551 bool runtime_invisible_annotations_exists = false;
2552 bool runtime_invisible_type_annotations_exists = false;
2553 bool runtime_invisible_parameter_annotations_exists = false;
2554 const u1* annotation_default = NULL;
2555 int annotation_default_length = 0;
2556
2557 // Parse code and exceptions attribute
2558 u2 method_attributes_count = cfs->get_u2_fast();
2559 while (method_attributes_count--) {
2560 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2561 const u2 method_attribute_name_index = cfs->get_u2_fast();
2562 const u4 method_attribute_length = cfs->get_u4_fast();
2563 check_property(
2564 valid_symbol_at(method_attribute_name_index),
2565 "Invalid method attribute name index %u in class file %s",
2566 method_attribute_name_index, CHECK_NULL);
2567
2568 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2569 if (method_attribute_name == vmSymbols::tag_code()) {
2570 // Parse Code attribute
2571 if (_need_verify) {
2572 guarantee_property(
2573 !access_flags.is_native() && !access_flags.is_abstract(),
2574 "Code attribute in native or abstract methods in class file %s",
2575 CHECK_NULL);
2576 }
2577 if (parsed_code_attribute) {
2578 classfile_parse_error("Multiple Code attributes in class file %s",
2579 CHECK_NULL);
2580 }
2581 parsed_code_attribute = true;
2582
2583 // Stack size, locals size, and code size
2584 cfs->guarantee_more(8, CHECK_NULL);
2585 max_stack = cfs->get_u2_fast();
2586 max_locals = cfs->get_u2_fast();
2587 code_length = cfs->get_u4_fast();
2588 if (_need_verify) {
2589 guarantee_property(args_size <= max_locals,
2590 "Arguments can't fit into locals in class file %s",
2591 CHECK_NULL);
2592 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2593 "Invalid method Code length %u in class file %s",
2594 code_length, CHECK_NULL);
2595 }
2596 // Code pointer
2597 code_start = cfs->current();
2598 assert(code_start != NULL, "null code start");
2599 cfs->guarantee_more(code_length, CHECK_NULL);
2600 cfs->skip_u1_fast(code_length);
2601
2602 // Exception handler table
2603 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2604 exception_table_length = cfs->get_u2_fast();
2605 if (exception_table_length > 0) {
2606 exception_table_start = parse_exception_table(cfs,
2607 code_length,
2608 exception_table_length,
2609 CHECK_NULL);
2610 }
2611
2612 // Parse additional attributes in code attribute
2613 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2614 u2 code_attributes_count = cfs->get_u2_fast();
2615
2616 unsigned int calculated_attribute_length = 0;
2617
2618 calculated_attribute_length =
2619 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2620 calculated_attribute_length +=
2621 code_length +
2622 sizeof(exception_table_length) +
2623 sizeof(code_attributes_count) +
2624 exception_table_length *
2625 ( sizeof(u2) + // start_pc
2626 sizeof(u2) + // end_pc
2627 sizeof(u2) + // handler_pc
2628 sizeof(u2) ); // catch_type_index
2629
2630 while (code_attributes_count--) {
2631 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2632 const u2 code_attribute_name_index = cfs->get_u2_fast();
2633 const u4 code_attribute_length = cfs->get_u4_fast();
2634 calculated_attribute_length += code_attribute_length +
2635 sizeof(code_attribute_name_index) +
2636 sizeof(code_attribute_length);
2637 check_property(valid_symbol_at(code_attribute_name_index),
2638 "Invalid code attribute name index %u in class file %s",
2639 code_attribute_name_index,
2640 CHECK_NULL);
2641 if (LoadLineNumberTables &&
2642 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2643 // Parse and compress line number table
2644 parse_linenumber_table(code_attribute_length,
2645 code_length,
2646 &linenumber_table,
2647 CHECK_NULL);
2648
2649 } else if (LoadLocalVariableTables &&
2650 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2651 // Parse local variable table
2652 if (!lvt_allocated) {
2653 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2654 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2655 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2656 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2657 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2658 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2659 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2660 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2661 lvt_allocated = true;
2662 }
2663 if (lvt_cnt == max_lvt_cnt) {
2664 max_lvt_cnt <<= 1;
2665 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2666 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2667 }
2668 localvariable_table_start[lvt_cnt] =
2669 parse_localvariable_table(cfs,
2670 code_length,
2671 max_locals,
2672 code_attribute_length,
2673 &localvariable_table_length[lvt_cnt],
2674 false, // is not LVTT
2675 CHECK_NULL);
2676 total_lvt_length += localvariable_table_length[lvt_cnt];
2677 lvt_cnt++;
2678 } else if (LoadLocalVariableTypeTables &&
2679 _major_version >= JAVA_1_5_VERSION &&
2680 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2681 if (!lvt_allocated) {
2682 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2683 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2684 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2685 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2686 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2687 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2688 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2689 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2690 lvt_allocated = true;
2691 }
2692 // Parse local variable type table
2693 if (lvtt_cnt == max_lvtt_cnt) {
2694 max_lvtt_cnt <<= 1;
2695 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2696 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2697 }
2698 localvariable_type_table_start[lvtt_cnt] =
2699 parse_localvariable_table(cfs,
2700 code_length,
2701 max_locals,
2702 code_attribute_length,
2703 &localvariable_type_table_length[lvtt_cnt],
2704 true, // is LVTT
2705 CHECK_NULL);
2706 lvtt_cnt++;
2707 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2708 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2709 // Stack map is only needed by the new verifier in JDK1.5.
2710 if (parsed_stackmap_attribute) {
2711 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2712 }
2713 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2714 stackmap_data_length = code_attribute_length;
2715 parsed_stackmap_attribute = true;
2716 } else {
2717 // Skip unknown attributes
2718 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2719 }
2720 }
2721 // check method attribute length
2722 if (_need_verify) {
2723 guarantee_property(method_attribute_length == calculated_attribute_length,
2724 "Code segment has wrong length in class file %s",
2725 CHECK_NULL);
2726 }
2727 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2728 // Parse Exceptions attribute
2729 if (parsed_checked_exceptions_attribute) {
2730 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2731 CHECK_NULL);
2732 }
2733 parsed_checked_exceptions_attribute = true;
2734 checked_exceptions_start =
2735 parse_checked_exceptions(cfs,
2736 &checked_exceptions_length,
2737 method_attribute_length,
2738 CHECK_NULL);
2739 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2740 // reject multiple method parameters
2741 if (method_parameters_seen) {
2742 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2743 CHECK_NULL);
2744 }
2745 method_parameters_seen = true;
2746 method_parameters_length = cfs->get_u1_fast();
2747 const u2 real_length = (method_parameters_length * 4u) + 1u;
2748 if (method_attribute_length != real_length) {
2749 classfile_parse_error(
2750 "Invalid MethodParameters method attribute length %u in class file",
2751 method_attribute_length, CHECK_NULL);
2752 }
2753 method_parameters_data = cfs->current();
2754 cfs->skip_u2_fast(method_parameters_length);
2755 cfs->skip_u2_fast(method_parameters_length);
2756 // ignore this attribute if it cannot be reflected
2757 if (!SystemDictionary::Parameter_klass_loaded())
2758 method_parameters_length = -1;
2759 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2760 if (method_attribute_length != 0) {
2761 classfile_parse_error(
2762 "Invalid Synthetic method attribute length %u in class file %s",
2763 method_attribute_length, CHECK_NULL);
2764 }
2765 // Should we check that there hasn't already been a synthetic attribute?
2766 access_flags.set_is_synthetic();
2767 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2768 if (method_attribute_length != 0) {
2769 classfile_parse_error(
2770 "Invalid Deprecated method attribute length %u in class file %s",
2771 method_attribute_length, CHECK_NULL);
2772 }
2773 } else if (_major_version >= JAVA_1_5_VERSION) {
2774 if (method_attribute_name == vmSymbols::tag_signature()) {
2775 if (generic_signature_index != 0) {
2776 classfile_parse_error(
2777 "Multiple Signature attributes for method in class file %s",
2778 CHECK_NULL);
2779 }
2780 if (method_attribute_length != 2) {
2781 classfile_parse_error(
2782 "Invalid Signature attribute length %u in class file %s",
2783 method_attribute_length, CHECK_NULL);
2784 }
2785 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2786 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2787 if (runtime_visible_annotations != NULL) {
2788 classfile_parse_error(
2789 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2790 CHECK_NULL);
2791 }
2792 runtime_visible_annotations_length = method_attribute_length;
2793 runtime_visible_annotations = cfs->current();
2794 assert(runtime_visible_annotations != NULL, "null visible annotations");
2795 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2796 parse_annotations(cp,
2797 runtime_visible_annotations,
2798 runtime_visible_annotations_length,
2799 &parsed_annotations,
2800 _loader_data,
2801 CHECK_NULL);
2802 cfs->skip_u1_fast(runtime_visible_annotations_length);
2803 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2804 if (runtime_invisible_annotations_exists) {
2805 classfile_parse_error(
2806 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2807 CHECK_NULL);
2808 }
2809 runtime_invisible_annotations_exists = true;
2810 if (PreserveAllAnnotations) {
2811 runtime_invisible_annotations_length = method_attribute_length;
2812 runtime_invisible_annotations = cfs->current();
2813 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2814 }
2815 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2816 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2817 if (runtime_visible_parameter_annotations != NULL) {
2818 classfile_parse_error(
2819 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2820 CHECK_NULL);
2821 }
2822 runtime_visible_parameter_annotations_length = method_attribute_length;
2823 runtime_visible_parameter_annotations = cfs->current();
2824 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2825 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2826 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2827 if (runtime_invisible_parameter_annotations_exists) {
2828 classfile_parse_error(
2829 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2830 CHECK_NULL);
2831 }
2832 runtime_invisible_parameter_annotations_exists = true;
2833 if (PreserveAllAnnotations) {
2834 runtime_invisible_parameter_annotations_length = method_attribute_length;
2835 runtime_invisible_parameter_annotations = cfs->current();
2836 assert(runtime_invisible_parameter_annotations != NULL,
2837 "null invisible parameter annotations");
2838 }
2839 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2840 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2841 if (annotation_default != NULL) {
2842 classfile_parse_error(
2843 "Multiple AnnotationDefault attributes for method in class file %s",
2844 CHECK_NULL);
2845 }
2846 annotation_default_length = method_attribute_length;
2847 annotation_default = cfs->current();
2848 assert(annotation_default != NULL, "null annotation default");
2849 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2850 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2851 if (runtime_visible_type_annotations != NULL) {
2852 classfile_parse_error(
2853 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2854 CHECK_NULL);
2855 }
2856 runtime_visible_type_annotations_length = method_attribute_length;
2857 runtime_visible_type_annotations = cfs->current();
2858 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2859 // No need for the VM to parse Type annotations
2860 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2861 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2862 if (runtime_invisible_type_annotations_exists) {
2863 classfile_parse_error(
2864 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2865 CHECK_NULL);
2866 } else {
2867 runtime_invisible_type_annotations_exists = true;
2868 }
2869 if (PreserveAllAnnotations) {
2870 runtime_invisible_type_annotations_length = method_attribute_length;
2871 runtime_invisible_type_annotations = cfs->current();
2872 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2873 }
2874 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2875 } else {
2876 // Skip unknown attributes
2877 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2878 }
2879 } else {
2880 // Skip unknown attributes
2881 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2882 }
2883 }
2884
2885 if (linenumber_table != NULL) {
2886 linenumber_table->write_terminator();
2887 linenumber_table_length = linenumber_table->position();
2888 }
2889
2890 // Make sure there's at least one Code attribute in non-native/non-abstract method
2891 if (_need_verify) {
2892 guarantee_property(access_flags.is_native() ||
2893 access_flags.is_abstract() ||
2894 parsed_code_attribute,
2895 "Absent Code attribute in method that is not native or abstract in class file %s",
2896 CHECK_NULL);
2897 }
2898
2899 // All sizing information for a Method* is finally available, now create it
2900 InlineTableSizes sizes(
2901 total_lvt_length,
2902 linenumber_table_length,
2903 exception_table_length,
2904 checked_exceptions_length,
2905 method_parameters_length,
2906 generic_signature_index,
2907 runtime_visible_annotations_length +
2908 runtime_invisible_annotations_length,
2909 runtime_visible_parameter_annotations_length +
2910 runtime_invisible_parameter_annotations_length,
2911 runtime_visible_type_annotations_length +
2912 runtime_invisible_type_annotations_length,
2913 annotation_default_length,
2914 0);
2915
2916 Method* const m = Method::allocate(_loader_data,
2917 code_length,
2918 access_flags,
2919 &sizes,
2920 ConstMethod::NORMAL,
2921 CHECK_NULL);
2922
2923 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2924
2925 // Fill in information from fixed part (access_flags already set)
2926 m->set_constants(_cp);
2927 m->set_name_index(name_index);
2928 m->set_signature_index(signature_index);
2929 m->compute_from_signature(cp->symbol_at(signature_index));
2930 assert(args_size < 0 || args_size == m->size_of_parameters(), "");
2931
2932 // Fill in code attribute information
2933 m->set_max_stack(max_stack);
2934 m->set_max_locals(max_locals);
2935 if (stackmap_data != NULL) {
2936 m->constMethod()->copy_stackmap_data(_loader_data,
2937 (u1*)stackmap_data,
2938 stackmap_data_length,
2939 CHECK_NULL);
2940 }
2941
2942 // Copy byte codes
2943 m->set_code((u1*)code_start);
2944
2945 // Copy line number table
2946 if (linenumber_table != NULL) {
2947 memcpy(m->compressed_linenumber_table(),
2948 linenumber_table->buffer(),
2949 linenumber_table_length);
2950 }
2951
2952 // Copy exception table
2953 if (exception_table_length > 0) {
2954 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2955 m->exception_table_start(),
2956 exception_table_length * sizeof(ExceptionTableElement),
2957 sizeof(u2));
2958 }
2959
2960 // Copy method parameters
2961 if (method_parameters_length > 0) {
2962 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2963 for (int i = 0; i < method_parameters_length; i++) {
2964 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2965 method_parameters_data += 2;
2966 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2967 method_parameters_data += 2;
2968 }
2969 }
2970
2971 // Copy checked exceptions
2972 if (checked_exceptions_length > 0) {
2973 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2974 m->checked_exceptions_start(),
2975 checked_exceptions_length * sizeof(CheckedExceptionElement),
2976 sizeof(u2));
2977 }
2978
2979 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2980 if (total_lvt_length > 0) {
2981 promoted_flags->set_has_localvariable_table();
2982 copy_localvariable_table(m->constMethod(),
2983 lvt_cnt,
2984 localvariable_table_length,
2985 localvariable_table_start,
2986 lvtt_cnt,
2987 localvariable_type_table_length,
2988 localvariable_type_table_start,
2989 CHECK_NULL);
2990 }
2991
2992 if (parsed_annotations.has_any_annotations())
2993 parsed_annotations.apply_to(methodHandle(THREAD, m));
2994
2995 // Copy annotations
2996 copy_method_annotations(m->constMethod(),
2997 runtime_visible_annotations,
2998 runtime_visible_annotations_length,
2999 runtime_invisible_annotations,
3000 runtime_invisible_annotations_length,
3001 runtime_visible_parameter_annotations,
3002 runtime_visible_parameter_annotations_length,
3003 runtime_invisible_parameter_annotations,
3004 runtime_invisible_parameter_annotations_length,
3005 runtime_visible_type_annotations,
3006 runtime_visible_type_annotations_length,
3007 runtime_invisible_type_annotations,
3008 runtime_invisible_type_annotations_length,
3009 annotation_default,
3010 annotation_default_length,
3011 CHECK_NULL);
3012
3013 if (name == vmSymbols::finalize_method_name() &&
3014 signature == vmSymbols::void_method_signature()) {
3015 if (m->is_empty_method()) {
3016 _has_empty_finalizer = true;
3017 } else {
3018 _has_finalizer = true;
3019 }
3020 }
3021 if (name == vmSymbols::object_initializer_name() &&
3022 signature == vmSymbols::void_method_signature() &&
3023 m->is_vanilla_constructor()) {
3024 _has_vanilla_constructor = true;
3025 }
3026
3027 NOT_PRODUCT(m->verify());
3028 return m;
3029 }
3030
3031
3032 // The promoted_flags parameter is used to pass relevant access_flags
3033 // from the methods back up to the containing klass. These flag values
3034 // are added to klass's access_flags.
3035 // Side-effects: populates the _methods field in the parser
3036 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
3037 bool is_interface,
3038 bool is_value_type,
3039 AccessFlags* promoted_flags,
3040 bool* has_final_method,
3041 bool* declares_nonstatic_concrete_methods,
3042 TRAPS) {
3043 assert(cfs != NULL, "invariant");
3044 assert(promoted_flags != NULL, "invariant");
3045 assert(has_final_method != NULL, "invariant");
3046 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
3047
3048 assert(NULL == _methods, "invariant");
3049
3050 cfs->guarantee_more(2, CHECK); // length
3051 const u2 length = cfs->get_u2_fast();
3052 if (length == 0) {
3053 _methods = Universe::the_empty_method_array();
3054 } else {
3055 _methods = MetadataFactory::new_array<Method*>(_loader_data,
3056 length,
3057 NULL,
3058 CHECK);
3059
3060 for (int index = 0; index < length; index++) {
3061 Method* method = parse_method(cfs,
3062 is_interface,
3063 is_value_type,
3064 _cp,
3065 promoted_flags,
3066 CHECK);
3067
3068 if (method->is_final()) {
3069 *has_final_method = true;
3070 }
3071 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
3072 // used for interface initialization, and default method inheritance analysis
3073 if (is_interface && !(*declares_nonstatic_concrete_methods)
3074 && !method->is_abstract() && !method->is_static()) {
3075 *declares_nonstatic_concrete_methods = true;
3076 }
3077 _methods->at_put(index, method);
3078 }
3079
3080 if (_need_verify && length > 1) {
3081 // Check duplicated methods
3082 ResourceMark rm(THREAD);
3083 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
3084 THREAD, NameSigHash*, HASH_ROW_SIZE);
3085 initialize_hashtable(names_and_sigs);
3086 bool dup = false;
3087 const Symbol* name = NULL;
3088 const Symbol* sig = NULL;
3089 {
3090 debug_only(NoSafepointVerifier nsv;)
3091 for (int i = 0; i < length; i++) {
3092 const Method* const m = _methods->at(i);
3093 name = m->name();
3094 sig = m->signature();
3095 // If no duplicates, add name/signature in hashtable names_and_sigs.
3096 if (!put_after_lookup(name, sig, names_and_sigs)) {
3097 dup = true;
3098 break;
3099 }
3100 }
3101 }
3102 if (dup) {
3103 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
3104 name->as_C_string(), sig->as_klass_external_name(), CHECK);
3105 }
3106 }
3107 }
3108 }
3109
3110 static const intArray* sort_methods(Array<Method*>* methods) {
3111 const int length = methods->length();
3112 // If JVMTI original method ordering or sharing is enabled we have to
3113 // remember the original class file ordering.
3114 // We temporarily use the vtable_index field in the Method* to store the
3115 // class file index, so we can read in after calling qsort.
3116 // Put the method ordering in the shared archive.
3117 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3118 for (int index = 0; index < length; index++) {
3119 Method* const m = methods->at(index);
3120 assert(!m->valid_vtable_index(), "vtable index should not be set");
3121 m->set_vtable_index(index);
3122 }
3123 }
3124 // Sort method array by ascending method name (for faster lookups & vtable construction)
3125 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3126 Method::sort_methods(methods);
3127
3128 intArray* method_ordering = NULL;
3129 // If JVMTI original method ordering or sharing is enabled construct int
3130 // array remembering the original ordering
3131 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3132 method_ordering = new intArray(length, length, -1);
3133 for (int index = 0; index < length; index++) {
3134 Method* const m = methods->at(index);
3135 const int old_index = m->vtable_index();
3136 assert(old_index >= 0 && old_index < length, "invalid method index");
3137 method_ordering->at_put(index, old_index);
3138 m->set_vtable_index(Method::invalid_vtable_index);
3139 }
3140 }
3141 return method_ordering;
3142 }
3143
3144 // Parse generic_signature attribute for methods and fields
3145 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3146 TRAPS) {
3147 assert(cfs != NULL, "invariant");
3148
3149 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3150 const u2 generic_signature_index = cfs->get_u2_fast();
3151 check_property(
3152 valid_symbol_at(generic_signature_index),
3153 "Invalid Signature attribute at constant pool index %u in class file %s",
3154 generic_signature_index, CHECK_0);
3155 return generic_signature_index;
3156 }
3157
3158 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3159 TRAPS) {
3160
3161 assert(cfs != NULL, "invariant");
3162
3163 cfs->guarantee_more(2, CHECK); // sourcefile_index
3164 const u2 sourcefile_index = cfs->get_u2_fast();
3165 check_property(
3166 valid_symbol_at(sourcefile_index),
3167 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3168 sourcefile_index, CHECK);
3169 set_class_sourcefile_index(sourcefile_index);
3170 }
3171
3172 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3173 int length,
3174 TRAPS) {
3175 assert(cfs != NULL, "invariant");
3176
3177 const u1* const sde_buffer = cfs->current();
3178 assert(sde_buffer != NULL, "null sde buffer");
3179
3180 // Don't bother storing it if there is no way to retrieve it
3181 if (JvmtiExport::can_get_source_debug_extension()) {
3182 assert((length+1) > length, "Overflow checking");
3183 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3184 for (int i = 0; i < length; i++) {
3185 sde[i] = sde_buffer[i];
3186 }
3187 sde[length] = '\0';
3188 set_class_sde_buffer((const char*)sde, length);
3189 }
3190 // Got utf8 string, set stream position forward
3191 cfs->skip_u1(length, CHECK);
3192 }
3193
3194
3195 // Inner classes can be static, private or protected (classic VM does this)
3196 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3197 JVM_ACC_PRIVATE | \
3198 JVM_ACC_PROTECTED | \
3199 JVM_ACC_STATIC \
3200 )
3201
3202 // Return number of classes in the inner classes attribute table
3203 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3204 const u1* const inner_classes_attribute_start,
3205 bool parsed_enclosingmethod_attribute,
3206 u2 enclosing_method_class_index,
3207 u2 enclosing_method_method_index,
3208 TRAPS) {
3209 const u1* const current_mark = cfs->current();
3210 u2 length = 0;
3211 if (inner_classes_attribute_start != NULL) {
3212 cfs->set_current(inner_classes_attribute_start);
3213 cfs->guarantee_more(2, CHECK_0); // length
3214 length = cfs->get_u2_fast();
3215 }
3216
3217 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3218 // method data:
3219 // [inner_class_info_index,
3220 // outer_class_info_index,
3221 // inner_name_index,
3222 // inner_class_access_flags,
3223 // ...
3224 // enclosing_method_class_index,
3225 // enclosing_method_method_index]
3226 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3227 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3228 _inner_classes = inner_classes;
3229
3230 int index = 0;
3231 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3232 for (int n = 0; n < length; n++) {
3233 // Inner class index
3234 const u2 inner_class_info_index = cfs->get_u2_fast();
3235 check_property(
3236 valid_klass_reference_at(inner_class_info_index),
3237 "inner_class_info_index %u has bad constant type in class file %s",
3238 inner_class_info_index, CHECK_0);
3239 // Outer class index
3240 const u2 outer_class_info_index = cfs->get_u2_fast();
3241 check_property(
3242 outer_class_info_index == 0 ||
3243 valid_klass_reference_at(outer_class_info_index),
3244 "outer_class_info_index %u has bad constant type in class file %s",
3245 outer_class_info_index, CHECK_0);
3246 // Inner class name
3247 const u2 inner_name_index = cfs->get_u2_fast();
3248 check_property(
3249 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3250 "inner_name_index %u has bad constant type in class file %s",
3251 inner_name_index, CHECK_0);
3252 if (_need_verify) {
3253 guarantee_property(inner_class_info_index != outer_class_info_index,
3254 "Class is both outer and inner class in class file %s", CHECK_0);
3255 }
3256
3257 jint recognized_modifiers = RECOGNIZED_INNER_CLASS_MODIFIERS;
3258 // JVM_ACC_MODULE is defined in JDK-9 and later.
3259 if (_major_version >= JAVA_9_VERSION) {
3260 recognized_modifiers |= JVM_ACC_MODULE;
3261 }
3262 // JVM_ACC_VALUE is defined for class file version 55 and later
3263 if (supports_value_types()) {
3264 recognized_modifiers |= JVM_ACC_VALUE;
3265 }
3266
3267 // Access flags
3268 jint flags = cfs->get_u2_fast() & recognized_modifiers;
3269
3270 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3271 // Set abstract bit for old class files for backward compatibility
3272 flags |= JVM_ACC_ABSTRACT;
3273 }
3274 verify_legal_class_modifiers(flags, CHECK_0);
3275 AccessFlags inner_access_flags(flags);
3276
3277 inner_classes->at_put(index++, inner_class_info_index);
3278 inner_classes->at_put(index++, outer_class_info_index);
3279 inner_classes->at_put(index++, inner_name_index);
3280 inner_classes->at_put(index++, inner_access_flags.as_short());
3281 }
3282
3283 // 4347400: make sure there's no duplicate entry in the classes array
3284 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3285 for(int i = 0; i < length * 4; i += 4) {
3286 for(int j = i + 4; j < length * 4; j += 4) {
3287 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3288 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3289 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3290 inner_classes->at(i+3) != inner_classes->at(j+3)),
3291 "Duplicate entry in InnerClasses in class file %s",
3292 CHECK_0);
3293 }
3294 }
3295 }
3296
3297 // Set EnclosingMethod class and method indexes.
3298 if (parsed_enclosingmethod_attribute) {
3299 inner_classes->at_put(index++, enclosing_method_class_index);
3300 inner_classes->at_put(index++, enclosing_method_method_index);
3301 }
3302 assert(index == size, "wrong size");
3303
3304 // Restore buffer's current position.
3305 cfs->set_current(current_mark);
3306
3307 return length;
3308 }
3309
3310 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3311 const u1* const nest_members_attribute_start,
3312 TRAPS) {
3313 const u1* const current_mark = cfs->current();
3314 u2 length = 0;
3315 if (nest_members_attribute_start != NULL) {
3316 cfs->set_current(nest_members_attribute_start);
3317 cfs->guarantee_more(2, CHECK_0); // length
3318 length = cfs->get_u2_fast();
3319 }
3320 const int size = length;
3321 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3322 _nest_members = nest_members;
3323
3324 int index = 0;
3325 cfs->guarantee_more(2 * length, CHECK_0);
3326 for (int n = 0; n < length; n++) {
3327 const u2 class_info_index = cfs->get_u2_fast();
3328 check_property(
3329 valid_klass_reference_at(class_info_index),
3330 "Nest member class_info_index %u has bad constant type in class file %s",
3331 class_info_index, CHECK_0);
3332 nest_members->at_put(index++, class_info_index);
3333 }
3334 assert(index == size, "wrong size");
3335
3336 // Restore buffer's current position.
3337 cfs->set_current(current_mark);
3338
3339 return length;
3340 }
3341
3342 // Record {
3343 // u2 attribute_name_index;
3344 // u4 attribute_length;
3345 // u2 components_count;
3346 // component_info components[components_count];
3347 // }
3348 // component_info {
3349 // u2 name_index;
3350 // u2 descriptor_index
3351 // u2 attributes_count;
3352 // attribute_info_attributes[attributes_count];
3353 // }
3354 u2 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3355 const ConstantPool* cp,
3356 const u1* const record_attribute_start,
3357 TRAPS) {
3358 const u1* const current_mark = cfs->current();
3359 int components_count = 0;
3360 unsigned int calculate_attr_size = 0;
3361 if (record_attribute_start != NULL) {
3362 cfs->set_current(record_attribute_start);
3363 cfs->guarantee_more(2, CHECK_0); // num of components
3364 components_count = (int)cfs->get_u2_fast();
3365 calculate_attr_size = 2;
3366 }
3367
3368 Array<RecordComponent*>* const record_components =
3369 MetadataFactory::new_array<RecordComponent*>(_loader_data, components_count, NULL, CHECK_0);
3370 _record_components = record_components;
3371
3372 for (int x = 0; x < components_count; x++) {
3373 cfs->guarantee_more(6, CHECK_0); // name_index, descriptor_index, attributes_count
3374
3375 const u2 name_index = cfs->get_u2_fast();
3376 check_property(valid_symbol_at(name_index),
3377 "Invalid constant pool index %u for name in Record attribute in class file %s",
3378 name_index, CHECK_0);
3379 const Symbol* const name = cp->symbol_at(name_index);
3380 verify_legal_field_name(name, CHECK_0);
3381
3382 const u2 descriptor_index = cfs->get_u2_fast();
3383 check_property(valid_symbol_at(descriptor_index),
3384 "Invalid constant pool index %u for descriptor in Record attribute in class file %s",
3385 descriptor_index, CHECK_0);
3386 const Symbol* const descr = cp->symbol_at(descriptor_index);
3387 verify_legal_field_signature(name, descr, CHECK_0);
3388
3389 const u2 attributes_count = cfs->get_u2_fast();
3390 calculate_attr_size += 6;
3391 u2 generic_sig_index = 0;
3392 const u1* runtime_visible_annotations = NULL;
3393 int runtime_visible_annotations_length = 0;
3394 const u1* runtime_invisible_annotations = NULL;
3395 int runtime_invisible_annotations_length = 0;
3396 bool runtime_invisible_annotations_exists = false;
3397 const u1* runtime_visible_type_annotations = NULL;
3398 int runtime_visible_type_annotations_length = 0;
3399 const u1* runtime_invisible_type_annotations = NULL;
3400 int runtime_invisible_type_annotations_length = 0;
3401 bool runtime_invisible_type_annotations_exists = false;
3402
3403 // Expected attributes for record components are Signature, Runtime(In)VisibleAnnotations,
3404 // and Runtime(In)VisibleTypeAnnotations. Other attributes are ignored.
3405 for (int y = 0; y < attributes_count; y++) {
3406 cfs->guarantee_more(6, CHECK_0); // attribute_name_index, attribute_length
3407 const u2 attribute_name_index = cfs->get_u2_fast();
3408 const u4 attribute_length = cfs->get_u4_fast();
3409 calculate_attr_size += 6;
3410 check_property(
3411 valid_symbol_at(attribute_name_index),
3412 "Invalid Record attribute name index %u in class file %s",
3413 attribute_name_index, CHECK_0);
3414
3415 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
3416 if (attribute_name == vmSymbols::tag_signature()) {
3417 if (generic_sig_index != 0) {
3418 classfile_parse_error(
3419 "Multiple Signature attributes for Record component in class file %s",
3420 CHECK_0);
3421 }
3422 if (attribute_length != 2) {
3423 classfile_parse_error(
3424 "Invalid Signature attribute length %u in Record component in class file %s",
3425 attribute_length, CHECK_0);
3426 }
3427 generic_sig_index = parse_generic_signature_attribute(cfs, CHECK_0);
3428
3429 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
3430 if (runtime_visible_annotations != NULL) {
3431 classfile_parse_error(
3432 "Multiple RuntimeVisibleAnnotations attributes for Record component in class file %s", CHECK_0);
3433 }
3434 runtime_visible_annotations_length = attribute_length;
3435 runtime_visible_annotations = cfs->current();
3436
3437 assert(runtime_visible_annotations != NULL, "null record component visible annotation");
3438 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_0);
3439 cfs->skip_u1_fast(runtime_visible_annotations_length);
3440
3441 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
3442 if (runtime_invisible_annotations_exists) {
3443 classfile_parse_error(
3444 "Multiple RuntimeInvisibleAnnotations attributes for Record component in class file %s", CHECK_0);
3445 }
3446 runtime_invisible_annotations_exists = true;
3447 if (PreserveAllAnnotations) {
3448 runtime_invisible_annotations_length = attribute_length;
3449 runtime_invisible_annotations = cfs->current();
3450 assert(runtime_invisible_annotations != NULL, "null record component invisible annotation");
3451 }
3452 cfs->skip_u1(attribute_length, CHECK_0);
3453
3454 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
3455 if (runtime_visible_type_annotations != NULL) {
3456 classfile_parse_error(
3457 "Multiple RuntimeVisibleTypeAnnotations attributes for Record component in class file %s", CHECK_0);
3458 }
3459 runtime_visible_type_annotations_length = attribute_length;
3460 runtime_visible_type_annotations = cfs->current();
3461
3462 assert(runtime_visible_type_annotations != NULL, "null record component visible type annotation");
3463 cfs->guarantee_more(runtime_visible_type_annotations_length, CHECK_0);
3464 cfs->skip_u1_fast(runtime_visible_type_annotations_length);
3465
3466 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
3467 if (runtime_invisible_type_annotations_exists) {
3468 classfile_parse_error(
3469 "Multiple RuntimeInvisibleTypeAnnotations attributes for Record component in class file %s", CHECK_0);
3470 }
3471 runtime_invisible_type_annotations_exists = true;
3472 if (PreserveAllAnnotations) {
3473 runtime_invisible_type_annotations_length = attribute_length;
3474 runtime_invisible_type_annotations = cfs->current();
3475 assert(runtime_invisible_type_annotations != NULL, "null record component invisible type annotation");
3476 }
3477 cfs->skip_u1(attribute_length, CHECK_0);
3478
3479 } else {
3480 // Skip unknown attributes
3481 cfs->skip_u1(attribute_length, CHECK_0);
3482 }
3483 calculate_attr_size += attribute_length;
3484 } // End of attributes For loop
3485
3486 AnnotationArray* annotations = assemble_annotations(runtime_visible_annotations,
3487 runtime_visible_annotations_length,
3488 runtime_invisible_annotations,
3489 runtime_invisible_annotations_length,
3490 CHECK_0);
3491 AnnotationArray* type_annotations = assemble_annotations(runtime_visible_type_annotations,
3492 runtime_visible_type_annotations_length,
3493 runtime_invisible_type_annotations,
3494 runtime_invisible_type_annotations_length,
3495 CHECK_0);
3496
3497 RecordComponent* record_component =
3498 RecordComponent::allocate(_loader_data, name_index, descriptor_index,
3499 attributes_count, generic_sig_index,
3500 annotations, type_annotations, CHECK_0);
3501 record_components->at_put(x, record_component);
3502 } // End of component processing loop
3503
3504 // Restore buffer's current position.
3505 cfs->set_current(current_mark);
3506 return calculate_attr_size;
3507 }
3508
3509 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3510 set_class_synthetic_flag(true);
3511 }
3512
3513 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3514 assert(cfs != NULL, "invariant");
3515
3516 const u2 signature_index = cfs->get_u2(CHECK);
3517 check_property(
3518 valid_symbol_at(signature_index),
3519 "Invalid constant pool index %u in Signature attribute in class file %s",
3520 signature_index, CHECK);
3521 set_class_generic_signature_index(signature_index);
3522 }
3523
3524 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3525 ConstantPool* cp,
3526 u4 attribute_byte_length,
3527 TRAPS) {
3528 assert(cfs != NULL, "invariant");
3529 assert(cp != NULL, "invariant");
3530
3531 const u1* const current_start = cfs->current();
3532
3533 guarantee_property(attribute_byte_length >= sizeof(u2),
3534 "Invalid BootstrapMethods attribute length %u in class file %s",
3535 attribute_byte_length,
3536 CHECK);
3537
3538 cfs->guarantee_more(attribute_byte_length, CHECK);
3539
3540 const int attribute_array_length = cfs->get_u2_fast();
3541
3542 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3543 "Short length on BootstrapMethods in class file %s",
3544 CHECK);
3545
3546
3547 // The attribute contains a counted array of counted tuples of shorts,
3548 // represending bootstrap specifiers:
3549 // length*{bootstrap_method_index, argument_count*{argument_index}}
3550 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3551 // operand_count = number of shorts in attr, except for leading length
3552
3553 // The attribute is copied into a short[] array.
3554 // The array begins with a series of short[2] pairs, one for each tuple.
3555 const int index_size = (attribute_array_length * 2);
3556
3557 Array<u2>* const operands =
3558 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3559
3560 // Eagerly assign operands so they will be deallocated with the constant
3561 // pool if there is an error.
3562 cp->set_operands(operands);
3563
3564 int operand_fill_index = index_size;
3565 const int cp_size = cp->length();
3566
3567 for (int n = 0; n < attribute_array_length; n++) {
3568 // Store a 32-bit offset into the header of the operand array.
3569 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3570
3571 // Read a bootstrap specifier.
3572 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3573 const u2 bootstrap_method_index = cfs->get_u2_fast();
3574 const u2 argument_count = cfs->get_u2_fast();
3575 check_property(
3576 valid_cp_range(bootstrap_method_index, cp_size) &&
3577 cp->tag_at(bootstrap_method_index).is_method_handle(),
3578 "bootstrap_method_index %u has bad constant type in class file %s",
3579 bootstrap_method_index,
3580 CHECK);
3581
3582 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3583 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3584 CHECK);
3585
3586 operands->at_put(operand_fill_index++, bootstrap_method_index);
3587 operands->at_put(operand_fill_index++, argument_count);
3588
3589 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3590 for (int j = 0; j < argument_count; j++) {
3591 const u2 argument_index = cfs->get_u2_fast();
3592 check_property(
3593 valid_cp_range(argument_index, cp_size) &&
3594 cp->tag_at(argument_index).is_loadable_constant(),
3595 "argument_index %u has bad constant type in class file %s",
3596 argument_index,
3597 CHECK);
3598 operands->at_put(operand_fill_index++, argument_index);
3599 }
3600 }
3601 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3602 "Bad length on BootstrapMethods in class file %s",
3603 CHECK);
3604 }
3605
3606 bool ClassFileParser::supports_records() {
3607 return _major_version == JVM_CLASSFILE_MAJOR_VERSION &&
3608 _minor_version == JAVA_PREVIEW_MINOR_VERSION &&
3609 Arguments::enable_preview();
3610 }
3611
3612 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3613 ConstantPool* cp,
3614 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3615 TRAPS) {
3616 assert(cfs != NULL, "invariant");
3617 assert(cp != NULL, "invariant");
3618 assert(parsed_annotations != NULL, "invariant");
3619
3620 // Set inner classes attribute to default sentinel
3621 _inner_classes = Universe::the_empty_short_array();
3622 // Set nest members attribute to default sentinel
3623 _nest_members = Universe::the_empty_short_array();
3624 cfs->guarantee_more(2, CHECK); // attributes_count
3625 u2 attributes_count = cfs->get_u2_fast();
3626 bool parsed_sourcefile_attribute = false;
3627 bool parsed_innerclasses_attribute = false;
3628 bool parsed_nest_members_attribute = false;
3629 bool parsed_nest_host_attribute = false;
3630 bool parsed_record_attribute = false;
3631 bool parsed_enclosingmethod_attribute = false;
3632 bool parsed_bootstrap_methods_attribute = false;
3633 const u1* runtime_visible_annotations = NULL;
3634 int runtime_visible_annotations_length = 0;
3635 const u1* runtime_invisible_annotations = NULL;
3636 int runtime_invisible_annotations_length = 0;
3637 const u1* runtime_visible_type_annotations = NULL;
3638 int runtime_visible_type_annotations_length = 0;
3639 const u1* runtime_invisible_type_annotations = NULL;
3640 int runtime_invisible_type_annotations_length = 0;
3641 bool runtime_invisible_type_annotations_exists = false;
3642 bool runtime_invisible_annotations_exists = false;
3643 bool parsed_source_debug_ext_annotations_exist = false;
3644 const u1* inner_classes_attribute_start = NULL;
3645 u4 inner_classes_attribute_length = 0;
3646 const u1* value_types_attribute_start = NULL;
3647 u4 value_types_attribute_length = 0;
3648 u2 enclosing_method_class_index = 0;
3649 u2 enclosing_method_method_index = 0;
3650 const u1* nest_members_attribute_start = NULL;
3651 u4 nest_members_attribute_length = 0;
3652 const u1* record_attribute_start = NULL;
3653 u4 record_attribute_length = 0;
3654
3655 // Iterate over attributes
3656 while (attributes_count--) {
3657 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3658 const u2 attribute_name_index = cfs->get_u2_fast();
3659 const u4 attribute_length = cfs->get_u4_fast();
3660 check_property(
3661 valid_symbol_at(attribute_name_index),
3662 "Attribute name has bad constant pool index %u in class file %s",
3663 attribute_name_index, CHECK);
3664 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3665 if (tag == vmSymbols::tag_source_file()) {
3666 // Check for SourceFile tag
3667 if (_need_verify) {
3668 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3669 }
3670 if (parsed_sourcefile_attribute) {
3671 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3672 } else {
3673 parsed_sourcefile_attribute = true;
3674 }
3675 parse_classfile_sourcefile_attribute(cfs, CHECK);
3676 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3677 // Check for SourceDebugExtension tag
3678 if (parsed_source_debug_ext_annotations_exist) {
3679 classfile_parse_error(
3680 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3681 }
3682 parsed_source_debug_ext_annotations_exist = true;
3683 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3684 } else if (tag == vmSymbols::tag_inner_classes()) {
3685 // Check for InnerClasses tag
3686 if (parsed_innerclasses_attribute) {
3687 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3688 } else {
3689 parsed_innerclasses_attribute = true;
3690 }
3691 inner_classes_attribute_start = cfs->current();
3692 inner_classes_attribute_length = attribute_length;
3693 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3694 } else if (tag == vmSymbols::tag_synthetic()) {
3695 // Check for Synthetic tag
3696 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3697 if (attribute_length != 0) {
3698 classfile_parse_error(
3699 "Invalid Synthetic classfile attribute length %u in class file %s",
3700 attribute_length, CHECK);
3701 }
3702 parse_classfile_synthetic_attribute(CHECK);
3703 } else if (tag == vmSymbols::tag_deprecated()) {
3704 // Check for Deprecatd tag - 4276120
3705 if (attribute_length != 0) {
3706 classfile_parse_error(
3707 "Invalid Deprecated classfile attribute length %u in class file %s",
3708 attribute_length, CHECK);
3709 }
3710 } else if (_major_version >= JAVA_1_5_VERSION) {
3711 if (tag == vmSymbols::tag_signature()) {
3712 if (_generic_signature_index != 0) {
3713 classfile_parse_error(
3714 "Multiple Signature attributes in class file %s", CHECK);
3715 }
3716 if (attribute_length != 2) {
3717 classfile_parse_error(
3718 "Wrong Signature attribute length %u in class file %s",
3719 attribute_length, CHECK);
3720 }
3721 parse_classfile_signature_attribute(cfs, CHECK);
3722 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3723 if (runtime_visible_annotations != NULL) {
3724 classfile_parse_error(
3725 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3726 }
3727 runtime_visible_annotations_length = attribute_length;
3728 runtime_visible_annotations = cfs->current();
3729 assert(runtime_visible_annotations != NULL, "null visible annotations");
3730 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3731 parse_annotations(cp,
3732 runtime_visible_annotations,
3733 runtime_visible_annotations_length,
3734 parsed_annotations,
3735 _loader_data,
3736 CHECK);
3737 cfs->skip_u1_fast(runtime_visible_annotations_length);
3738 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3739 if (runtime_invisible_annotations_exists) {
3740 classfile_parse_error(
3741 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3742 }
3743 runtime_invisible_annotations_exists = true;
3744 if (PreserveAllAnnotations) {
3745 runtime_invisible_annotations_length = attribute_length;
3746 runtime_invisible_annotations = cfs->current();
3747 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3748 }
3749 cfs->skip_u1(attribute_length, CHECK);
3750 } else if (tag == vmSymbols::tag_enclosing_method()) {
3751 if (parsed_enclosingmethod_attribute) {
3752 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3753 } else {
3754 parsed_enclosingmethod_attribute = true;
3755 }
3756 guarantee_property(attribute_length == 4,
3757 "Wrong EnclosingMethod attribute length %u in class file %s",
3758 attribute_length, CHECK);
3759 cfs->guarantee_more(4, CHECK); // class_index, method_index
3760 enclosing_method_class_index = cfs->get_u2_fast();
3761 enclosing_method_method_index = cfs->get_u2_fast();
3762 if (enclosing_method_class_index == 0) {
3763 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3764 }
3765 // Validate the constant pool indices and types
3766 check_property(valid_klass_reference_at(enclosing_method_class_index),
3767 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3768 if (enclosing_method_method_index != 0 &&
3769 (!cp->is_within_bounds(enclosing_method_method_index) ||
3770 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3771 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3772 }
3773 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3774 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3775 if (parsed_bootstrap_methods_attribute) {
3776 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3777 }
3778 parsed_bootstrap_methods_attribute = true;
3779 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3780 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3781 if (runtime_visible_type_annotations != NULL) {
3782 classfile_parse_error(
3783 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3784 }
3785 runtime_visible_type_annotations_length = attribute_length;
3786 runtime_visible_type_annotations = cfs->current();
3787 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3788 // No need for the VM to parse Type annotations
3789 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3790 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3791 if (runtime_invisible_type_annotations_exists) {
3792 classfile_parse_error(
3793 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3794 } else {
3795 runtime_invisible_type_annotations_exists = true;
3796 }
3797 if (PreserveAllAnnotations) {
3798 runtime_invisible_type_annotations_length = attribute_length;
3799 runtime_invisible_type_annotations = cfs->current();
3800 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3801 }
3802 cfs->skip_u1(attribute_length, CHECK);
3803 } else if (_major_version >= JAVA_11_VERSION) {
3804 if (tag == vmSymbols::tag_nest_members()) {
3805 // Check for NestMembers tag
3806 if (parsed_nest_members_attribute) {
3807 classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3808 } else {
3809 parsed_nest_members_attribute = true;
3810 }
3811 if (parsed_nest_host_attribute) {
3812 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3813 }
3814 nest_members_attribute_start = cfs->current();
3815 nest_members_attribute_length = attribute_length;
3816 cfs->skip_u1(nest_members_attribute_length, CHECK);
3817 } else if (tag == vmSymbols::tag_nest_host()) {
3818 if (parsed_nest_host_attribute) {
3819 classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3820 } else {
3821 parsed_nest_host_attribute = true;
3822 }
3823 if (parsed_nest_members_attribute) {
3824 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3825 }
3826 if (_need_verify) {
3827 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3828 }
3829 cfs->guarantee_more(2, CHECK);
3830 u2 class_info_index = cfs->get_u2_fast();
3831 check_property(
3832 valid_klass_reference_at(class_info_index),
3833 "Nest-host class_info_index %u has bad constant type in class file %s",
3834 class_info_index, CHECK);
3835 _nest_host = class_info_index;
3836 } else if (_major_version >= JAVA_14_VERSION) {
3837 if (tag == vmSymbols::tag_record()) {
3838 // Skip over Record attribute if not supported or if super class is
3839 // not java.lang.Record.
3840 if (supports_records() &&
3841 cp->klass_name_at(_super_class_index) == vmSymbols::java_lang_Record()) {
3842 if (parsed_record_attribute) {
3843 classfile_parse_error("Multiple Record attributes in class file %s", CHECK);
3844 }
3845 // Check that class is final and not abstract.
3846 if (!_access_flags.is_final() || _access_flags.is_abstract()) {
3847 classfile_parse_error("Record attribute in non-final or abstract class file %s", CHECK);
3848 }
3849 parsed_record_attribute = true;
3850 record_attribute_start = cfs->current();
3851 record_attribute_length = attribute_length;
3852 } else if (log_is_enabled(Info, class, record)) {
3853 // Log why the Record attribute was ignored. Note that if the
3854 // class file version is JVM_CLASSFILE_MAJOR_VERSION.65535 and
3855 // --enable-preview wasn't specified then a java.lang.UnsupportedClassVersionError
3856 // exception would have been thrown.
3857 ResourceMark rm(THREAD);
3858 if (supports_records()) {
3859 log_info(class, record)(
3860 "Ignoring Record attribute in class %s because super type is not java.lang.Record",
3861 _class_name->as_C_string());
3862 } else {
3863 log_info(class, record)(
3864 "Ignoring Record attribute in class %s because class file version is not %d.65535",
3865 _class_name->as_C_string(), JVM_CLASSFILE_MAJOR_VERSION);
3866 }
3867 }
3868 cfs->skip_u1(attribute_length, CHECK);
3869 } else {
3870 // Unknown attribute
3871 cfs->skip_u1(attribute_length, CHECK);
3872 }
3873 } else {
3874 // Unknown attribute
3875 cfs->skip_u1(attribute_length, CHECK);
3876 }
3877 } else {
3878 // Unknown attribute
3879 cfs->skip_u1(attribute_length, CHECK);
3880 }
3881 } else {
3882 // Unknown attribute
3883 cfs->skip_u1(attribute_length, CHECK);
3884 }
3885 }
3886 _class_annotations = assemble_annotations(runtime_visible_annotations,
3887 runtime_visible_annotations_length,
3888 runtime_invisible_annotations,
3889 runtime_invisible_annotations_length,
3890 CHECK);
3891 _class_type_annotations = assemble_annotations(runtime_visible_type_annotations,
3892 runtime_visible_type_annotations_length,
3893 runtime_invisible_type_annotations,
3894 runtime_invisible_type_annotations_length,
3895 CHECK);
3896
3897 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3898 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3899 cfs,
3900 inner_classes_attribute_start,
3901 parsed_innerclasses_attribute,
3902 enclosing_method_class_index,
3903 enclosing_method_method_index,
3904 CHECK);
3905 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3906 guarantee_property(
3907 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3908 "Wrong InnerClasses attribute length in class file %s", CHECK);
3909 }
3910 }
3911
3912 if (parsed_nest_members_attribute) {
3913 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3914 cfs,
3915 nest_members_attribute_start,
3916 CHECK);
3917 if (_need_verify) {
3918 guarantee_property(
3919 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3920 "Wrong NestMembers attribute length in class file %s", CHECK);
3921 }
3922 }
3923
3924 if (parsed_record_attribute) {
3925 const unsigned int calculated_attr_length = parse_classfile_record_attribute(
3926 cfs,
3927 cp,
3928 record_attribute_start,
3929 CHECK);
3930 if (_need_verify) {
3931 guarantee_property(record_attribute_length == calculated_attr_length,
3932 "Record attribute has wrong length in class file %s",
3933 CHECK);
3934 }
3935 }
3936
3937 if (_max_bootstrap_specifier_index >= 0) {
3938 guarantee_property(parsed_bootstrap_methods_attribute,
3939 "Missing BootstrapMethods attribute in class file %s", CHECK);
3940 }
3941 }
3942
3943 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3944 assert(k != NULL, "invariant");
3945
3946 if (_synthetic_flag)
3947 k->set_is_synthetic();
3948 if (_sourcefile_index != 0) {
3949 k->set_source_file_name_index(_sourcefile_index);
3950 }
3951 if (_generic_signature_index != 0) {
3952 k->set_generic_signature_index(_generic_signature_index);
3953 }
3954 if (_sde_buffer != NULL) {
3955 k->set_source_debug_extension(_sde_buffer, _sde_length);
3956 }
3957 }
3958
3959 // Create the Annotations object that will
3960 // hold the annotations array for the Klass.
3961 void ClassFileParser::create_combined_annotations(TRAPS) {
3962 if (_class_annotations == NULL &&
3963 _class_type_annotations == NULL &&
3964 _fields_annotations == NULL &&
3965 _fields_type_annotations == NULL) {
3966 // Don't create the Annotations object unnecessarily.
3967 return;
3968 }
3969
3970 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3971 annotations->set_class_annotations(_class_annotations);
3972 annotations->set_class_type_annotations(_class_type_annotations);
3973 annotations->set_fields_annotations(_fields_annotations);
3974 annotations->set_fields_type_annotations(_fields_type_annotations);
3975
3976 // This is the Annotations object that will be
3977 // assigned to InstanceKlass being constructed.
3978 _combined_annotations = annotations;
3979
3980 // The annotations arrays below has been transfered the
3981 // _combined_annotations so these fields can now be cleared.
3982 _class_annotations = NULL;
3983 _class_type_annotations = NULL;
3984 _fields_annotations = NULL;
3985 _fields_type_annotations = NULL;
3986 }
3987
3988 // Transfer ownership of metadata allocated to the InstanceKlass.
3989 void ClassFileParser::apply_parsed_class_metadata(
3990 InstanceKlass* this_klass,
3991 int java_fields_count,
3992 TRAPS) {
3993 assert(this_klass != NULL, "invariant");
3994
3995 _cp->set_pool_holder(this_klass);
3996 this_klass->set_constants(_cp);
3997 this_klass->set_fields(_fields, java_fields_count);
3998 this_klass->set_methods(_methods);
3999 this_klass->set_inner_classes(_inner_classes);
4000 this_klass->set_nest_members(_nest_members);
4001 this_klass->set_nest_host_index(_nest_host);
4002 this_klass->set_local_interfaces(_local_interfaces);
4003 this_klass->set_annotations(_combined_annotations);
4004 this_klass->set_record_components(_record_components);
4005 // Delay the setting of _transitive_interfaces until after initialize_supers() in
4006 // fill_instance_klass(). It is because the _transitive_interfaces may be shared with
4007 // its _super. If an OOM occurs while loading the current klass, its _super field
4008 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
4009 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
4010 // dereferences to the deallocated _transitive_interfaces will result in a crash.
4011
4012 // Clear out these fields so they don't get deallocated by the destructor
4013 clear_class_metadata();
4014 }
4015
4016 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
4017 int runtime_visible_annotations_length,
4018 const u1* const runtime_invisible_annotations,
4019 int runtime_invisible_annotations_length,
4020 TRAPS) {
4021 AnnotationArray* annotations = NULL;
4022 if (runtime_visible_annotations != NULL ||
4023 runtime_invisible_annotations != NULL) {
4024 annotations = MetadataFactory::new_array<u1>(_loader_data,
4025 runtime_visible_annotations_length +
4026 runtime_invisible_annotations_length,
4027 CHECK_(annotations));
4028 if (runtime_visible_annotations != NULL) {
4029 for (int i = 0; i < runtime_visible_annotations_length; i++) {
4030 annotations->at_put(i, runtime_visible_annotations[i]);
4031 }
4032 }
4033 if (runtime_invisible_annotations != NULL) {
4034 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
4035 int append = runtime_visible_annotations_length+i;
4036 annotations->at_put(append, runtime_invisible_annotations[i]);
4037 }
4038 }
4039 }
4040 return annotations;
4041 }
4042
4043 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
4044 const int super_class_index,
4045 const bool need_verify,
4046 TRAPS) {
4047 assert(cp != NULL, "invariant");
4048 const InstanceKlass* super_klass = NULL;
4049
4050 if (super_class_index == 0) {
4051 check_property(_class_name == vmSymbols::java_lang_Object()
4052 || (_access_flags.get_flags() & JVM_ACC_VALUE),
4053 "Invalid superclass index %u in class file %s",
4054 super_class_index,
4055 CHECK_NULL);
4056 } else {
4057 check_property(valid_klass_reference_at(super_class_index),
4058 "Invalid superclass index %u in class file %s",
4059 super_class_index,
4060 CHECK_NULL);
4061 // The class name should be legal because it is checked when parsing constant pool.
4062 // However, make sure it is not an array type.
4063 bool is_array = false;
4064 if (cp->tag_at(super_class_index).is_klass()) {
4065 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
4066 if (need_verify)
4067 is_array = super_klass->is_array_klass();
4068 } else if (need_verify) {
4069 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
4070 }
4071 if (need_verify) {
4072 guarantee_property(!is_array,
4073 "Bad superclass name in class file %s", CHECK_NULL);
4074 }
4075 }
4076 return super_klass;
4077 }
4078
4079 #ifndef PRODUCT
4080 static void print_field_layout(const Symbol* name,
4081 Array<u2>* fields,
4082 ConstantPool* cp,
4083 int instance_size,
4084 int instance_fields_start,
4085 int instance_fields_end,
4086 int static_fields_end) {
4087
4088 assert(name != NULL, "invariant");
4089
4090 tty->print("%s: field layout\n", name->as_klass_external_name());
4091 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
4092 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
4093 if (!fs.access_flags().is_static()) {
4094 tty->print(" @%3d \"%s\" %s\n",
4095 fs.offset(),
4096 fs.name()->as_klass_external_name(),
4097 fs.signature()->as_klass_external_name());
4098 }
4099 }
4100 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
4101 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
4102 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
4103 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
4104 if (fs.access_flags().is_static()) {
4105 tty->print(" @%3d \"%s\" %s\n",
4106 fs.offset(),
4107 fs.name()->as_klass_external_name(),
4108 fs.signature()->as_klass_external_name());
4109 }
4110 }
4111 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
4112 tty->print("\n");
4113 }
4114 #endif
4115
4116 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
4117 _max_nonstatic_oop_maps = max_blocks;
4118 _nonstatic_oop_map_count = 0;
4119 if (max_blocks == 0) {
4120 _nonstatic_oop_maps = NULL;
4121 } else {
4122 _nonstatic_oop_maps =
4123 NEW_RESOURCE_ARRAY(OopMapBlock, _max_nonstatic_oop_maps);
4124 memset(_nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
4125 }
4126 }
4127
4128 OopMapBlock* OopMapBlocksBuilder::last_oop_map() const {
4129 assert(_nonstatic_oop_map_count > 0, "Has no oop maps");
4130 return _nonstatic_oop_maps + (_nonstatic_oop_map_count - 1);
4131 }
4132
4133 // addition of super oop maps
4134 void OopMapBlocksBuilder::initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
4135 assert(nof_blocks && _nonstatic_oop_map_count == 0 &&
4136 nof_blocks <= _max_nonstatic_oop_maps, "invariant");
4137
4138 memcpy(_nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
4139 _nonstatic_oop_map_count += nof_blocks;
4140 }
4141
4142 // collection of oops
4143 void OopMapBlocksBuilder::add(int offset, int count) {
4144 if (_nonstatic_oop_map_count == 0) {
4145 _nonstatic_oop_map_count++;
4146 }
4147 OopMapBlock* nonstatic_oop_map = last_oop_map();
4148 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
4149 nonstatic_oop_map->set_offset(offset);
4150 nonstatic_oop_map->set_count(count);
4151 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
4152 nonstatic_oop_map->increment_count(count);
4153 } else { // Need a new one...
4154 _nonstatic_oop_map_count++;
4155 assert(_nonstatic_oop_map_count <= _max_nonstatic_oop_maps, "range check");
4156 nonstatic_oop_map = last_oop_map();
4157 nonstatic_oop_map->set_offset(offset);
4158 nonstatic_oop_map->set_count(count);
4159 }
4160 }
4161
4162 // general purpose copy, e.g. into allocated instanceKlass
4163 void OopMapBlocksBuilder::copy(OopMapBlock* dst) {
4164 if (_nonstatic_oop_map_count != 0) {
4165 memcpy(dst, _nonstatic_oop_maps, sizeof(OopMapBlock) * _nonstatic_oop_map_count);
4166 }
4167 }
4168
4169 // Sort and compact adjacent blocks
4170 void OopMapBlocksBuilder::compact() {
4171 if (_nonstatic_oop_map_count <= 1) {
4172 return;
4173 }
4174 /*
4175 * Since field layout sneeks in oops before values, we will be able to condense
4176 * blocks. There is potential to compact between super, own refs and values
4177 * containing refs.
4178 *
4179 * Currently compaction is slightly limited due to values being 8 byte aligned.
4180 * This may well change: FixMe if it doesn't, the code below is fairly general purpose
4181 * and maybe it doesn't need to be.
4182 */
4183 qsort(_nonstatic_oop_maps, _nonstatic_oop_map_count, sizeof(OopMapBlock),
4184 (_sort_Fn)OopMapBlock::compare_offset);
4185 if (_nonstatic_oop_map_count < 2) {
4186 return;
4187 }
4188
4189 // Make a temp copy, and iterate through and copy back into the original
4190 ResourceMark rm;
4191 OopMapBlock* oop_maps_copy =
4192 NEW_RESOURCE_ARRAY(OopMapBlock, _nonstatic_oop_map_count);
4193 OopMapBlock* oop_maps_copy_end = oop_maps_copy + _nonstatic_oop_map_count;
4194 copy(oop_maps_copy);
4195 OopMapBlock* nonstatic_oop_map = _nonstatic_oop_maps;
4196 unsigned int new_count = 1;
4197 oop_maps_copy++;
4198 while(oop_maps_copy < oop_maps_copy_end) {
4199 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
4200 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
4201 nonstatic_oop_map->increment_count(oop_maps_copy->count());
4202 } else {
4203 nonstatic_oop_map++;
4204 new_count++;
4205 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
4206 nonstatic_oop_map->set_count(oop_maps_copy->count());
4207 }
4208 oop_maps_copy++;
4209 }
4210 assert(new_count <= _nonstatic_oop_map_count, "end up with more maps after compact() ?");
4211 _nonstatic_oop_map_count = new_count;
4212 }
4213
4214 void OopMapBlocksBuilder::print_on(outputStream* st) const {
4215 st->print_cr(" OopMapBlocks: %3d /%3d", _nonstatic_oop_map_count, _max_nonstatic_oop_maps);
4216 if (_nonstatic_oop_map_count > 0) {
4217 OopMapBlock* map = _nonstatic_oop_maps;
4218 OopMapBlock* last_map = last_oop_map();
4219 assert(map <= last_map, "Last less than first");
4220 while (map <= last_map) {
4221 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
4222 map->offset() + map->offset_span() - heapOopSize, map->count());
4223 map++;
4224 }
4225 }
4226 }
4227
4228 void OopMapBlocksBuilder::print_value_on(outputStream* st) const {
4229 print_on(st);
4230 }
4231
4232 void ClassFileParser::throwValueTypeLimitation(THREAD_AND_LOCATION_DECL,
4233 const char* msg,
4234 const Symbol* name,
4235 const Symbol* sig) const {
4236
4237 ResourceMark rm(THREAD);
4238 if (name == NULL || sig == NULL) {
4239 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4240 vmSymbols::java_lang_ClassFormatError(),
4241 "class: %s - %s", _class_name->as_C_string(), msg);
4242 }
4243 else {
4244 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4245 vmSymbols::java_lang_ClassFormatError(),
4246 "\"%s\" sig: \"%s\" class: %s - %s", name->as_C_string(), sig->as_C_string(),
4247 _class_name->as_C_string(), msg);
4248 }
4249 }
4250
4251 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
4252 void ClassFileParser::layout_fields(ConstantPool* cp,
4253 const FieldAllocationCount* fac,
4254 const ClassAnnotationCollector* parsed_annotations,
4255 FieldLayoutInfo* info,
4256 TRAPS) {
4257
4258 assert(cp != NULL, "invariant");
4259
4260 // Field size and offset computation
4261 int nonstatic_field_size = _super_klass == NULL ? 0 :
4262 _super_klass->nonstatic_field_size();
4263 int next_nonstatic_valuetype_offset = 0;
4264 int first_nonstatic_valuetype_offset = 0;
4265
4266 // Fields that are value types are handled differently depending if they are static or not:
4267 // - static fields are oops
4268 // - non-static fields are embedded
4269
4270 // Count the contended fields by type.
4271 //
4272 // We ignore static fields, because @Contended is not supported for them.
4273 // The layout code below will also ignore the static fields.
4274 int nonstatic_contended_count = 0;
4275 FieldAllocationCount fac_contended;
4276 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4277 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4278 if (fs.is_contended()) {
4279 fac_contended.count[atype]++;
4280 if (!fs.access_flags().is_static()) {
4281 nonstatic_contended_count++;
4282 }
4283 }
4284 }
4285
4286
4287 // Calculate the starting byte offsets
4288 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
4289 // Value types in static fields are not embedded, they are handled with oops
4290 int next_static_double_offset = next_static_oop_offset +
4291 ((fac->count[STATIC_OOP] + fac->count[STATIC_FLATTENABLE]) * heapOopSize);
4292 if (fac->count[STATIC_DOUBLE]) {
4293 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
4294 }
4295
4296 int next_static_word_offset = next_static_double_offset +
4297 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
4298 int next_static_short_offset = next_static_word_offset +
4299 ((fac->count[STATIC_WORD]) * BytesPerInt);
4300 int next_static_byte_offset = next_static_short_offset +
4301 ((fac->count[STATIC_SHORT]) * BytesPerShort);
4302
4303 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
4304 nonstatic_field_size * heapOopSize;
4305
4306 // First field of value types is aligned on a long boundary in order to ease
4307 // in-lining of value types (with header removal) in packed arrays and
4308 // flatten value types
4309 int initial_value_type_padding = 0;
4310 if (is_value_type()) {
4311 int old = nonstatic_fields_start;
4312 nonstatic_fields_start = align_up(nonstatic_fields_start, BytesPerLong);
4313 initial_value_type_padding = nonstatic_fields_start - old;
4314 }
4315
4316 int next_nonstatic_field_offset = nonstatic_fields_start;
4317
4318 const bool is_contended_class = parsed_annotations->is_contended();
4319
4320 // Class is contended, pad before all the fields
4321 if (is_contended_class) {
4322 next_nonstatic_field_offset += ContendedPaddingWidth;
4323 }
4324
4325 // Temporary value types restrictions
4326 if (is_value_type()) {
4327 if (is_contended_class) {
4328 throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support @Contended annotation yet");
4329 return;
4330 }
4331 }
4332
4333 // Compute the non-contended fields count.
4334 // The packing code below relies on these counts to determine if some field
4335 // can be squeezed into the alignment gap. Contended fields are obviously
4336 // exempt from that.
4337 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
4338 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
4339 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
4340 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
4341 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
4342
4343 int static_value_type_count = 0;
4344 int nonstatic_value_type_count = 0;
4345 int* nonstatic_value_type_indexes = NULL;
4346 Klass** nonstatic_value_type_klasses = NULL;
4347 unsigned int value_type_oop_map_count = 0;
4348 int not_flattened_value_types = 0;
4349
4350 int max_nonstatic_value_type = fac->count[NONSTATIC_FLATTENABLE] + 1;
4351
4352 nonstatic_value_type_indexes = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, int,
4353 max_nonstatic_value_type);
4354 for (int i = 0; i < max_nonstatic_value_type; i++) {
4355 nonstatic_value_type_indexes[i] = -1;
4356 }
4357 nonstatic_value_type_klasses = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, Klass*,
4358 max_nonstatic_value_type);
4359
4360 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
4361 if (fs.allocation_type() == STATIC_FLATTENABLE) {
4362 ResourceMark rm;
4363 if (!fs.signature()->is_Q_signature()) {
4364 THROW(vmSymbols::java_lang_ClassFormatError());
4365 }
4366 static_value_type_count++;
4367 } else if (fs.allocation_type() == NONSTATIC_FLATTENABLE) {
4368 // Pre-resolve the flattenable field and check for value type circularity issues.
4369 ResourceMark rm;
4370 if (!fs.signature()->is_Q_signature()) {
4371 THROW(vmSymbols::java_lang_ClassFormatError());
4372 }
4373 Klass* klass =
4374 SystemDictionary::resolve_flattenable_field_or_fail(&fs,
4375 Handle(THREAD, _loader_data->class_loader()),
4376 _protection_domain, true, CHECK);
4377 assert(klass != NULL, "Sanity check");
4378 if (!klass->access_flags().is_value_type()) {
4379 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
4380 }
4381 ValueKlass* vk = ValueKlass::cast(klass);
4382 // Conditions to apply flattening or not should be defined in a single place
4383 if ((ValueFieldMaxFlatSize < 0) || (vk->size_helper() * HeapWordSize) <= ValueFieldMaxFlatSize) {
4384 nonstatic_value_type_indexes[nonstatic_value_type_count] = fs.index();
4385 nonstatic_value_type_klasses[nonstatic_value_type_count] = klass;
4386 nonstatic_value_type_count++;
4387
4388 ValueKlass* vklass = ValueKlass::cast(klass);
4389 if (vklass->contains_oops()) {
4390 value_type_oop_map_count += vklass->nonstatic_oop_map_count();
4391 }
4392 fs.set_flattened(true);
4393 } else {
4394 not_flattened_value_types++;
4395 fs.set_flattened(false);
4396 }
4397 }
4398 }
4399
4400 // Adjusting non_static_oop_count to take into account not flattened value types;
4401 nonstatic_oop_count += not_flattened_value_types;
4402
4403 // Total non-static fields count, including every contended field
4404 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
4405 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
4406 fac->count[NONSTATIC_OOP] + fac->count[NONSTATIC_FLATTENABLE];
4407
4408 const bool super_has_nonstatic_fields =
4409 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
4410 const bool has_nonstatic_fields =
4411 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
4412 const bool has_nonstatic_value_fields = nonstatic_value_type_count > 0;
4413
4414 if (is_value_type() && (!has_nonstatic_fields)) {
4415 // There are a number of fixes required throughout the type system and JIT
4416 throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support zero instance size yet");
4417 return;
4418 }
4419
4420 // Prepare list of oops for oop map generation.
4421 //
4422 // "offset" and "count" lists are describing the set of contiguous oop
4423 // regions. offset[i] is the start of the i-th region, which then has
4424 // count[i] oops following. Before we know how many regions are required,
4425 // we pessimistically allocate the maps to fit all the oops into the
4426 // distinct regions.
4427 //
4428 int super_oop_map_count = (_super_klass == NULL) ? 0 :_super_klass->nonstatic_oop_map_count();
4429 int max_oop_map_count =
4430 super_oop_map_count +
4431 fac->count[NONSTATIC_OOP] +
4432 value_type_oop_map_count +
4433 not_flattened_value_types;
4434
4435 OopMapBlocksBuilder* nonstatic_oop_maps = new OopMapBlocksBuilder(max_oop_map_count);
4436 if (super_oop_map_count > 0) {
4437 nonstatic_oop_maps->initialize_inherited_blocks(_super_klass->start_of_nonstatic_oop_maps(),
4438 _super_klass->nonstatic_oop_map_count());
4439 }
4440
4441 int first_nonstatic_oop_offset = 0; // will be set for first oop field
4442
4443 bool compact_fields = true;
4444 bool allocate_oops_first = false;
4445
4446 // The next classes have predefined hard-coded fields offsets
4447 // (see in JavaClasses::compute_hard_coded_offsets()).
4448 // Use default fields allocation order for them.
4449 if (_loader_data->class_loader() == NULL &&
4450 (_class_name == vmSymbols::java_lang_ref_Reference() ||
4451 _class_name == vmSymbols::java_lang_Boolean() ||
4452 _class_name == vmSymbols::java_lang_Character() ||
4453 _class_name == vmSymbols::java_lang_Float() ||
4454 _class_name == vmSymbols::java_lang_Double() ||
4455 _class_name == vmSymbols::java_lang_Byte() ||
4456 _class_name == vmSymbols::java_lang_Short() ||
4457 _class_name == vmSymbols::java_lang_Integer() ||
4458 _class_name == vmSymbols::java_lang_Long())) {
4459 allocate_oops_first = true; // Allocate oops first
4460 compact_fields = false; // Don't compact fields
4461 }
4462
4463 int next_nonstatic_oop_offset = 0;
4464 int next_nonstatic_double_offset = 0;
4465
4466 // Rearrange fields for a given allocation style
4467 if (allocate_oops_first) {
4468 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
4469 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4470 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4471 (nonstatic_oop_count * heapOopSize);
4472 } else {
4473 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
4474 next_nonstatic_double_offset = next_nonstatic_field_offset;
4475 }
4476
4477 int nonstatic_oop_space_count = 0;
4478 int nonstatic_word_space_count = 0;
4479 int nonstatic_short_space_count = 0;
4480 int nonstatic_byte_space_count = 0;
4481 int nonstatic_oop_space_offset = 0;
4482 int nonstatic_word_space_offset = 0;
4483 int nonstatic_short_space_offset = 0;
4484 int nonstatic_byte_space_offset = 0;
4485
4486 // Try to squeeze some of the fields into the gaps due to
4487 // long/double alignment.
4488 if (nonstatic_double_count > 0) {
4489 int offset = next_nonstatic_double_offset;
4490 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
4491 if (compact_fields && offset != next_nonstatic_double_offset) {
4492 // Allocate available fields into the gap before double field.
4493 int length = next_nonstatic_double_offset - offset;
4494 assert(length == BytesPerInt, "");
4495 nonstatic_word_space_offset = offset;
4496 if (nonstatic_word_count > 0) {
4497 nonstatic_word_count -= 1;
4498 nonstatic_word_space_count = 1; // Only one will fit
4499 length -= BytesPerInt;
4500 offset += BytesPerInt;
4501 }
4502 nonstatic_short_space_offset = offset;
4503 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4504 nonstatic_short_count -= 1;
4505 nonstatic_short_space_count += 1;
4506 length -= BytesPerShort;
4507 offset += BytesPerShort;
4508 }
4509 nonstatic_byte_space_offset = offset;
4510 while (length > 0 && nonstatic_byte_count > 0) {
4511 nonstatic_byte_count -= 1;
4512 nonstatic_byte_space_count += 1;
4513 length -= 1;
4514 }
4515 // Allocate oop field in the gap if there are no other fields for that.
4516 nonstatic_oop_space_offset = offset;
4517 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4518 !allocate_oops_first) { // when oop fields not first
4519 nonstatic_oop_count -= 1;
4520 nonstatic_oop_space_count = 1; // Only one will fit
4521 length -= heapOopSize;
4522 offset += heapOopSize;
4523 }
4524 }
4525 }
4526
4527 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4528 (nonstatic_double_count * BytesPerLong);
4529 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4530 (nonstatic_word_count * BytesPerInt);
4531 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4532 (nonstatic_short_count * BytesPerShort);
4533 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4534 nonstatic_byte_count;
4535
4536 // let oops jump before padding with this allocation style
4537 if (!allocate_oops_first) {
4538 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4539 if( nonstatic_oop_count > 0 ) {
4540 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4541 }
4542 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4543 }
4544
4545 // Aligning embedded value types
4546 // bug below, the current algorithm to layout embedded value types always put them at the
4547 // end of the layout, which doesn't match the different allocation policies the VM is
4548 // supposed to provide => FixMe
4549 // Note also that the current alignment policy is to make each value type starting on a
4550 // 64 bits boundary. This could be optimized later. For instance, it could be nice to
4551 // align value types according to their most constrained internal type.
4552 next_nonstatic_valuetype_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4553 int next_value_type_index = 0;
4554
4555 // Iterate over fields again and compute correct offsets.
4556 // The field allocation type was temporarily stored in the offset slot.
4557 // oop fields are located before non-oop fields (static and non-static).
4558 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4559
4560 // skip already laid out fields
4561 if (fs.is_offset_set()) continue;
4562
4563 // contended instance fields are handled below
4564 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4565
4566 int real_offset = 0;
4567 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4568
4569 // pack the rest of the fields
4570 switch (atype) {
4571 // Value types in static fields are handled with oops
4572 case STATIC_FLATTENABLE: // Fallthrough
4573 case STATIC_OOP:
4574 real_offset = next_static_oop_offset;
4575 next_static_oop_offset += heapOopSize;
4576 break;
4577 case STATIC_BYTE:
4578 real_offset = next_static_byte_offset;
4579 next_static_byte_offset += 1;
4580 break;
4581 case STATIC_SHORT:
4582 real_offset = next_static_short_offset;
4583 next_static_short_offset += BytesPerShort;
4584 break;
4585 case STATIC_WORD:
4586 real_offset = next_static_word_offset;
4587 next_static_word_offset += BytesPerInt;
4588 break;
4589 case STATIC_DOUBLE:
4590 real_offset = next_static_double_offset;
4591 next_static_double_offset += BytesPerLong;
4592 break;
4593 case NONSTATIC_FLATTENABLE:
4594 if (fs.is_flattened()) {
4595 Klass* klass = nonstatic_value_type_klasses[next_value_type_index];
4596 assert(klass != NULL, "Klass should have been loaded and resolved earlier");
4597 assert(klass->access_flags().is_value_type(),"Must be a value type");
4598 ValueKlass* vklass = ValueKlass::cast(klass);
4599 real_offset = next_nonstatic_valuetype_offset;
4600 next_nonstatic_valuetype_offset += (vklass->size_helper()) * wordSize - vklass->first_field_offset();
4601 // aligning next value type on a 64 bits boundary
4602 next_nonstatic_valuetype_offset = align_up(next_nonstatic_valuetype_offset, BytesPerLong);
4603 next_value_type_index += 1;
4604
4605 if (vklass->contains_oops()) { // add flatten oop maps
4606 int diff = real_offset - vklass->first_field_offset();
4607 const OopMapBlock* map = vklass->start_of_nonstatic_oop_maps();
4608 const OopMapBlock* const last_map = map + vklass->nonstatic_oop_map_count();
4609 while (map < last_map) {
4610 nonstatic_oop_maps->add(map->offset() + diff, map->count());
4611 map++;
4612 }
4613 }
4614 break;
4615 } else {
4616 // Fall through
4617 }
4618 case NONSTATIC_OOP:
4619 if( nonstatic_oop_space_count > 0 ) {
4620 real_offset = nonstatic_oop_space_offset;
4621 nonstatic_oop_space_offset += heapOopSize;
4622 nonstatic_oop_space_count -= 1;
4623 } else {
4624 real_offset = next_nonstatic_oop_offset;
4625 next_nonstatic_oop_offset += heapOopSize;
4626 }
4627 nonstatic_oop_maps->add(real_offset, 1);
4628 break;
4629 case NONSTATIC_BYTE:
4630 if( nonstatic_byte_space_count > 0 ) {
4631 real_offset = nonstatic_byte_space_offset;
4632 nonstatic_byte_space_offset += 1;
4633 nonstatic_byte_space_count -= 1;
4634 } else {
4635 real_offset = next_nonstatic_byte_offset;
4636 next_nonstatic_byte_offset += 1;
4637 }
4638 break;
4639 case NONSTATIC_SHORT:
4640 if( nonstatic_short_space_count > 0 ) {
4641 real_offset = nonstatic_short_space_offset;
4642 nonstatic_short_space_offset += BytesPerShort;
4643 nonstatic_short_space_count -= 1;
4644 } else {
4645 real_offset = next_nonstatic_short_offset;
4646 next_nonstatic_short_offset += BytesPerShort;
4647 }
4648 break;
4649 case NONSTATIC_WORD:
4650 if( nonstatic_word_space_count > 0 ) {
4651 real_offset = nonstatic_word_space_offset;
4652 nonstatic_word_space_offset += BytesPerInt;
4653 nonstatic_word_space_count -= 1;
4654 } else {
4655 real_offset = next_nonstatic_word_offset;
4656 next_nonstatic_word_offset += BytesPerInt;
4657 }
4658 break;
4659 case NONSTATIC_DOUBLE:
4660 real_offset = next_nonstatic_double_offset;
4661 next_nonstatic_double_offset += BytesPerLong;
4662 break;
4663 default:
4664 ShouldNotReachHere();
4665 }
4666 fs.set_offset(real_offset);
4667 }
4668
4669
4670 // Handle the contended cases.
4671 //
4672 // Each contended field should not intersect the cache line with another contended field.
4673 // In the absence of alignment information, we end up with pessimistically separating
4674 // the fields with full-width padding.
4675 //
4676 // Additionally, this should not break alignment for the fields, so we round the alignment up
4677 // for each field.
4678 if (nonstatic_contended_count > 0) {
4679
4680 // if there is at least one contended field, we need to have pre-padding for them
4681 next_nonstatic_padded_offset += ContendedPaddingWidth;
4682
4683 // collect all contended groups
4684 ResourceBitMap bm(cp->size());
4685 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4686 // skip already laid out fields
4687 if (fs.is_offset_set()) continue;
4688
4689 if (fs.is_contended()) {
4690 bm.set_bit(fs.contended_group());
4691 }
4692 }
4693
4694 int current_group = -1;
4695 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4696
4697 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4698
4699 // skip already laid out fields
4700 if (fs.is_offset_set()) continue;
4701
4702 // skip non-contended fields and fields from different group
4703 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4704
4705 // handle statics below
4706 if (fs.access_flags().is_static()) continue;
4707
4708 int real_offset = 0;
4709 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4710
4711 switch (atype) {
4712 case NONSTATIC_BYTE:
4713 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4714 real_offset = next_nonstatic_padded_offset;
4715 next_nonstatic_padded_offset += 1;
4716 break;
4717
4718 case NONSTATIC_SHORT:
4719 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4720 real_offset = next_nonstatic_padded_offset;
4721 next_nonstatic_padded_offset += BytesPerShort;
4722 break;
4723
4724 case NONSTATIC_WORD:
4725 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4726 real_offset = next_nonstatic_padded_offset;
4727 next_nonstatic_padded_offset += BytesPerInt;
4728 break;
4729
4730 case NONSTATIC_DOUBLE:
4731 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4732 real_offset = next_nonstatic_padded_offset;
4733 next_nonstatic_padded_offset += BytesPerLong;
4734 break;
4735
4736 // Value types in static fields are handled with oops
4737 case NONSTATIC_FLATTENABLE:
4738 throwValueTypeLimitation(THREAD_AND_LOCATION,
4739 "@Contended annotation not supported for value types yet", fs.name(), fs.signature());
4740 return;
4741
4742 case NONSTATIC_OOP:
4743 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4744 real_offset = next_nonstatic_padded_offset;
4745 next_nonstatic_padded_offset += heapOopSize;
4746 nonstatic_oop_maps->add(real_offset, 1);
4747 break;
4748
4749 default:
4750 ShouldNotReachHere();
4751 }
4752
4753 if (fs.contended_group() == 0) {
4754 // Contended group defines the equivalence class over the fields:
4755 // the fields within the same contended group are not inter-padded.
4756 // The only exception is default group, which does not incur the
4757 // equivalence, and so requires intra-padding.
4758 next_nonstatic_padded_offset += ContendedPaddingWidth;
4759 }
4760
4761 fs.set_offset(real_offset);
4762 } // for
4763
4764 // Start laying out the next group.
4765 // Note that this will effectively pad the last group in the back;
4766 // this is expected to alleviate memory contention effects for
4767 // subclass fields and/or adjacent object.
4768 // If this was the default group, the padding is already in place.
4769 if (current_group != 0) {
4770 next_nonstatic_padded_offset += ContendedPaddingWidth;
4771 }
4772 }
4773
4774 // handle static fields
4775 }
4776
4777 // Entire class is contended, pad in the back.
4778 // This helps to alleviate memory contention effects for subclass fields
4779 // and/or adjacent object.
4780 if (is_contended_class) {
4781 assert(!is_value_type(), "@Contended not supported for value types yet");
4782 next_nonstatic_padded_offset += ContendedPaddingWidth;
4783 }
4784
4785 int notaligned_nonstatic_fields_end;
4786 if (nonstatic_value_type_count != 0) {
4787 notaligned_nonstatic_fields_end = next_nonstatic_valuetype_offset;
4788 } else {
4789 notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4790 }
4791
4792 int nonstatic_field_sz_align = heapOopSize;
4793 if (is_value_type()) {
4794 if ((notaligned_nonstatic_fields_end - nonstatic_fields_start) > heapOopSize) {
4795 nonstatic_field_sz_align = BytesPerLong; // value copy of fields only uses jlong copy
4796 }
4797 }
4798 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, nonstatic_field_sz_align);
4799 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4800 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4801
4802 int static_field_size = (static_fields_end -
4803 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4804 nonstatic_field_size = nonstatic_field_size +
4805 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4806
4807 int instance_size = align_object_size(instance_end / wordSize);
4808
4809 assert(instance_size == align_object_size(align_up(
4810 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize)
4811 + initial_value_type_padding, wordSize) / wordSize), "consistent layout helper value");
4812
4813
4814 // Invariant: nonstatic_field end/start should only change if there are
4815 // nonstatic fields in the class, or if the class is contended. We compare
4816 // against the non-aligned value, so that end alignment will not fail the
4817 // assert without actually having the fields.
4818 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4819 is_contended_class ||
4820 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4821
4822 // Number of non-static oop map blocks allocated at end of klass.
4823 nonstatic_oop_maps->compact();
4824
4825 #ifndef PRODUCT
4826 if ((PrintFieldLayout && !is_value_type()) ||
4827 (PrintValueLayout && (is_value_type() || has_nonstatic_value_fields))) {
4828 print_field_layout(_class_name,
4829 _fields,
4830 cp,
4831 instance_size,
4832 nonstatic_fields_start,
4833 nonstatic_fields_end,
4834 static_fields_end);
4835 nonstatic_oop_maps->print_on(tty);
4836 tty->print("\n");
4837 tty->print_cr("Instance size = %d", instance_size);
4838 tty->print_cr("Nonstatic_field_size = %d", nonstatic_field_size);
4839 tty->print_cr("Static_field_size = %d", static_field_size);
4840 tty->print_cr("Has nonstatic fields = %d", has_nonstatic_fields);
4841 tty->print_cr("---");
4842 }
4843
4844 #endif
4845 // Pass back information needed for InstanceKlass creation
4846 info->oop_map_blocks = nonstatic_oop_maps;
4847 info->_instance_size = instance_size;
4848 info->_static_field_size = static_field_size;
4849 info->_nonstatic_field_size = nonstatic_field_size;
4850 info->_has_nonstatic_fields = has_nonstatic_fields;
4851 }
4852
4853 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4854 assert(ik != NULL, "invariant");
4855
4856 const Klass* const super = ik->super();
4857
4858 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4859 // in which case we don't have to register objects as finalizable
4860 if (!_has_empty_finalizer) {
4861 if (_has_finalizer ||
4862 (super != NULL && super->has_finalizer())) {
4863 ik->set_has_finalizer();
4864 }
4865 }
4866
4867 #ifdef ASSERT
4868 bool f = false;
4869 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4870 vmSymbols::void_method_signature());
4871 if (m != NULL && !m->is_empty_method()) {
4872 f = true;
4873 }
4874
4875 // Spec doesn't prevent agent from redefinition of empty finalizer.
4876 // Despite the fact that it's generally bad idea and redefined finalizer
4877 // will not work as expected we shouldn't abort vm in this case
4878 if (!ik->has_redefined_this_or_super()) {
4879 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4880 }
4881 #endif
4882
4883 // Check if this klass supports the java.lang.Cloneable interface
4884 if (SystemDictionary::Cloneable_klass_loaded()) {
4885 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4886 if (ik->is_value()) {
4887 Thread *THREAD = Thread::current();
4888 throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support Cloneable");
4889 return;
4890 }
4891 ik->set_is_cloneable();
4892 }
4893 }
4894
4895 // Check if this klass has a vanilla default constructor
4896 if (super == NULL) {
4897 // java.lang.Object has empty default constructor
4898 ik->set_has_vanilla_constructor();
4899 } else {
4900 if (super->has_vanilla_constructor() &&
4901 _has_vanilla_constructor) {
4902 ik->set_has_vanilla_constructor();
4903 }
4904 #ifdef ASSERT
4905 bool v = false;
4906 if (super->has_vanilla_constructor()) {
4907 const Method* const constructor =
4908 ik->find_method(vmSymbols::object_initializer_name(),
4909 vmSymbols::void_method_signature());
4910 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4911 v = true;
4912 }
4913 }
4914 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4915 #endif
4916 }
4917
4918 // If it cannot be fast-path allocated, set a bit in the layout helper.
4919 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4920 assert(ik->size_helper() > 0, "layout_helper is initialized");
4921 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4922 || ik->is_abstract() || ik->is_interface()
4923 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4924 || ik->size_helper() >= FastAllocateSizeLimit) {
4925 // Forbid fast-path allocation.
4926 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4927 ik->set_layout_helper(lh);
4928 }
4929 }
4930
4931 bool ClassFileParser::supports_value_types() const {
4932 // Value types are only supported by class file version 55 and later
4933 return _major_version >= JAVA_11_VERSION;
4934 }
4935
4936 // utility methods for appending an array with check for duplicates
4937
4938 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4939 const Array<InstanceKlass*>* const ifs) {
4940 // iterate over new interfaces
4941 for (int i = 0; i < ifs->length(); i++) {
4942 InstanceKlass* const e = ifs->at(i);
4943 assert(e->is_klass() && e->is_interface(), "just checking");
4944 // add new interface
4945 result->append_if_missing(e);
4946 }
4947 }
4948
4949 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4950 Array<InstanceKlass*>* local_ifs,
4951 ClassLoaderData* loader_data,
4952 TRAPS) {
4953 assert(local_ifs != NULL, "invariant");
4954 assert(loader_data != NULL, "invariant");
4955
4956 // Compute maximum size for transitive interfaces
4957 int max_transitive_size = 0;
4958 int super_size = 0;
4959 // Add superclass transitive interfaces size
4960 if (super != NULL) {
4961 super_size = super->transitive_interfaces()->length();
4962 max_transitive_size += super_size;
4963 }
4964 // Add local interfaces' super interfaces
4965 const int local_size = local_ifs->length();
4966 for (int i = 0; i < local_size; i++) {
4967 InstanceKlass* const l = local_ifs->at(i);
4968 max_transitive_size += l->transitive_interfaces()->length();
4969 }
4970 // Finally add local interfaces
4971 max_transitive_size += local_size;
4972 // Construct array
4973 if (max_transitive_size == 0) {
4974 // no interfaces, use canonicalized array
4975 return Universe::the_empty_instance_klass_array();
4976 } else if (max_transitive_size == super_size) {
4977 // no new local interfaces added, share superklass' transitive interface array
4978 return super->transitive_interfaces();
4979 } else if (max_transitive_size == local_size) {
4980 // only local interfaces added, share local interface array
4981 return local_ifs;
4982 } else {
4983 ResourceMark rm;
4984 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4985
4986 // Copy down from superclass
4987 if (super != NULL) {
4988 append_interfaces(result, super->transitive_interfaces());
4989 }
4990
4991 // Copy down from local interfaces' superinterfaces
4992 for (int i = 0; i < local_size; i++) {
4993 InstanceKlass* const l = local_ifs->at(i);
4994 append_interfaces(result, l->transitive_interfaces());
4995 }
4996 // Finally add local interfaces
4997 append_interfaces(result, local_ifs);
4998
4999 // length will be less than the max_transitive_size if duplicates were removed
5000 const int length = result->length();
5001 assert(length <= max_transitive_size, "just checking");
5002 Array<InstanceKlass*>* const new_result =
5003 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
5004 for (int i = 0; i < length; i++) {
5005 InstanceKlass* const e = result->at(i);
5006 assert(e != NULL, "just checking");
5007 new_result->at_put(i, e);
5008 }
5009 return new_result;
5010 }
5011 }
5012
5013 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
5014 assert(this_klass != NULL, "invariant");
5015 const Klass* const super = this_klass->super();
5016
5017 if (super != NULL) {
5018
5019 // If the loader is not the boot loader then throw an exception if its
5020 // superclass is in package jdk.internal.reflect and its loader is not a
5021 // special reflection class loader
5022 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
5023 assert(super->is_instance_klass(), "super is not instance klass");
5024 PackageEntry* super_package = super->package();
5025 if (super_package != NULL &&
5026 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
5027 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
5028 ResourceMark rm(THREAD);
5029 Exceptions::fthrow(
5030 THREAD_AND_LOCATION,
5031 vmSymbols::java_lang_IllegalAccessError(),
5032 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
5033 this_klass->external_name(),
5034 this_klass->class_loader_data()->loader_name_and_id(),
5035 super->external_name());
5036 return;
5037 }
5038 }
5039
5040 Reflection::VerifyClassAccessResults vca_result =
5041 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
5042 if (vca_result != Reflection::ACCESS_OK) {
5043 ResourceMark rm(THREAD);
5044 char* msg = Reflection::verify_class_access_msg(this_klass,
5045 InstanceKlass::cast(super),
5046 vca_result);
5047 if (msg == NULL) {
5048 bool same_module = (this_klass->module() == super->module());
5049 Exceptions::fthrow(
5050 THREAD_AND_LOCATION,
5051 vmSymbols::java_lang_IllegalAccessError(),
5052 "class %s cannot access its %ssuperclass %s (%s%s%s)",
5053 this_klass->external_name(),
5054 super->is_abstract() ? "abstract " : "",
5055 super->external_name(),
5056 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
5057 (same_module) ? "" : "; ",
5058 (same_module) ? "" : super->class_in_module_of_loader());
5059 } else {
5060 // Add additional message content.
5061 Exceptions::fthrow(
5062 THREAD_AND_LOCATION,
5063 vmSymbols::java_lang_IllegalAccessError(),
5064 "superclass access check failed: %s",
5065 msg);
5066 }
5067 }
5068 }
5069 }
5070
5071
5072 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
5073 assert(this_klass != NULL, "invariant");
5074 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
5075 const int lng = local_interfaces->length();
5076 for (int i = lng - 1; i >= 0; i--) {
5077 InstanceKlass* const k = local_interfaces->at(i);
5078 assert (k != NULL && k->is_interface(), "invalid interface");
5079 Reflection::VerifyClassAccessResults vca_result =
5080 Reflection::verify_class_access(this_klass, k, false);
5081 if (vca_result != Reflection::ACCESS_OK) {
5082 ResourceMark rm(THREAD);
5083 char* msg = Reflection::verify_class_access_msg(this_klass,
5084 k,
5085 vca_result);
5086 if (msg == NULL) {
5087 bool same_module = (this_klass->module() == k->module());
5088 Exceptions::fthrow(
5089 THREAD_AND_LOCATION,
5090 vmSymbols::java_lang_IllegalAccessError(),
5091 "class %s cannot access its superinterface %s (%s%s%s)",
5092 this_klass->external_name(),
5093 k->external_name(),
5094 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
5095 (same_module) ? "" : "; ",
5096 (same_module) ? "" : k->class_in_module_of_loader());
5097 } else {
5098 // Add additional message content.
5099 Exceptions::fthrow(
5100 THREAD_AND_LOCATION,
5101 vmSymbols::java_lang_IllegalAccessError(),
5102 "superinterface check failed: %s",
5103 msg);
5104 }
5105 }
5106 }
5107 }
5108
5109
5110 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
5111 assert(this_klass != NULL, "invariant");
5112 const Array<Method*>* const methods = this_klass->methods();
5113 const int num_methods = methods->length();
5114
5115 // go thru each method and check if it overrides a final method
5116 for (int index = 0; index < num_methods; index++) {
5117 const Method* const m = methods->at(index);
5118
5119 // skip private, static, and <init> methods
5120 if ((!m->is_private() && !m->is_static()) &&
5121 (m->name() != vmSymbols::object_initializer_name())) {
5122
5123 const Symbol* const name = m->name();
5124 const Symbol* const signature = m->signature();
5125 const Klass* k = this_klass->super();
5126 const Method* super_m = NULL;
5127 while (k != NULL) {
5128 // skip supers that don't have final methods.
5129 if (k->has_final_method()) {
5130 // lookup a matching method in the super class hierarchy
5131 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
5132 if (super_m == NULL) {
5133 break; // didn't find any match; get out
5134 }
5135
5136 if (super_m->is_final() && !super_m->is_static() &&
5137 !super_m->access_flags().is_private()) {
5138 // matching method in super is final, and not static or private
5139 bool can_access = Reflection::verify_member_access(this_klass,
5140 super_m->method_holder(),
5141 super_m->method_holder(),
5142 super_m->access_flags(),
5143 false, false, CHECK);
5144 if (can_access) {
5145 // this class can access super final method and therefore override
5146 ResourceMark rm(THREAD);
5147 Exceptions::fthrow(THREAD_AND_LOCATION,
5148 vmSymbols::java_lang_VerifyError(),
5149 "class %s overrides final method %s.%s%s",
5150 this_klass->external_name(),
5151 super_m->method_holder()->external_name(),
5152 name->as_C_string(),
5153 signature->as_C_string()
5154 );
5155 return;
5156 }
5157 }
5158
5159 // continue to look from super_m's holder's super.
5160 k = super_m->method_holder()->super();
5161 continue;
5162 }
5163
5164 k = k->super();
5165 }
5166 }
5167 }
5168 }
5169
5170
5171 // assumes that this_klass is an interface
5172 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
5173 assert(this_klass != NULL, "invariant");
5174 assert(this_klass->is_interface(), "not an interface");
5175 const Array<Method*>* methods = this_klass->methods();
5176 const int num_methods = methods->length();
5177
5178 for (int index = 0; index < num_methods; index++) {
5179 const Method* const m = methods->at(index);
5180 // if m is static and not the init method, throw a verify error
5181 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
5182 ResourceMark rm(THREAD);
5183 Exceptions::fthrow(
5184 THREAD_AND_LOCATION,
5185 vmSymbols::java_lang_VerifyError(),
5186 "Illegal static method %s in interface %s",
5187 m->name()->as_C_string(),
5188 this_klass->external_name()
5189 );
5190 return;
5191 }
5192 }
5193 }
5194
5195 // utility methods for format checking
5196
5197 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
5198 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
5199 const bool is_value_type = (flags & JVM_ACC_VALUE) != 0;
5200 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
5201 assert(supports_value_types() || !is_value_type, "JVM_ACC_VALUE should not be set");
5202 if (is_module) {
5203 ResourceMark rm(THREAD);
5204 Exceptions::fthrow(
5205 THREAD_AND_LOCATION,
5206 vmSymbols::java_lang_NoClassDefFoundError(),
5207 "%s is not a class because access_flag ACC_MODULE is set",
5208 _class_name->as_C_string());
5209 return;
5210 }
5211
5212 if (is_value_type && !EnableValhalla) {
5213 ResourceMark rm(THREAD);
5214 Exceptions::fthrow(
5215 THREAD_AND_LOCATION,
5216 vmSymbols::java_lang_ClassFormatError(),
5217 "Class modifier ACC_VALUE in class %s requires option -XX:+EnableValhalla",
5218 _class_name->as_C_string()
5219 );
5220 }
5221
5222 if (!_need_verify) { return; }
5223
5224 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
5225 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
5226 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
5227 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
5228 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
5229 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
5230 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
5231 const bool major_gte_14 = _major_version >= JAVA_14_VERSION;
5232
5233 if ((is_abstract && is_final) ||
5234 (is_interface && !is_abstract) ||
5235 (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
5236 (!is_interface && major_gte_1_5 && is_annotation) ||
5237 (is_value_type && (is_interface || is_abstract || is_enum || !is_final))) {
5238 ResourceMark rm(THREAD);
5239 const char* class_note = "";
5240 if (is_value_type) class_note = " (an inline class)";
5241 Exceptions::fthrow(
5242 THREAD_AND_LOCATION,
5243 vmSymbols::java_lang_ClassFormatError(),
5244 "Illegal class modifiers in class %s%s: 0x%X",
5245 _class_name->as_C_string(), class_note, flags
5246 );
5247 return;
5248 }
5249 }
5250
5251 static bool has_illegal_visibility(jint flags) {
5252 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
5253 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
5254 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
5255
5256 return ((is_public && is_protected) ||
5257 (is_public && is_private) ||
5258 (is_protected && is_private));
5259 }
5260
5261 // A legal major_version.minor_version must be one of the following:
5262 //
5263 // Major_version >= 45 and major_version < 56, any minor_version.
5264 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
5265 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
5266 //
5267 static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
5268 ResourceMark rm(THREAD);
5269 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
5270 if (major < JAVA_MIN_SUPPORTED_VERSION) {
5271 Exceptions::fthrow(
5272 THREAD_AND_LOCATION,
5273 vmSymbols::java_lang_UnsupportedClassVersionError(),
5274 "%s (class file version %u.%u) was compiled with an invalid major version",
5275 class_name->as_C_string(), major, minor);
5276 return;
5277 }
5278
5279 if (major > max_version) {
5280 Exceptions::fthrow(
5281 THREAD_AND_LOCATION,
5282 vmSymbols::java_lang_UnsupportedClassVersionError(),
5283 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5284 "this version of the Java Runtime only recognizes class file versions up to %u.0",
5285 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
5286 return;
5287 }
5288
5289 if (major < JAVA_12_VERSION || minor == 0) {
5290 return;
5291 }
5292
5293 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
5294 if (major != max_version) {
5295 Exceptions::fthrow(
5296 THREAD_AND_LOCATION,
5297 vmSymbols::java_lang_UnsupportedClassVersionError(),
5298 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
5299 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
5300 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
5301 return;
5302 }
5303
5304 if (!Arguments::enable_preview()) {
5305 Exceptions::fthrow(
5306 THREAD_AND_LOCATION,
5307 vmSymbols::java_lang_UnsupportedClassVersionError(),
5308 "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
5309 class_name->as_C_string(), major, minor);
5310 return;
5311 }
5312
5313 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
5314 Exceptions::fthrow(
5315 THREAD_AND_LOCATION,
5316 vmSymbols::java_lang_UnsupportedClassVersionError(),
5317 "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
5318 class_name->as_C_string(), major, minor);
5319 }
5320 }
5321
5322 void ClassFileParser::verify_legal_field_modifiers(jint flags,
5323 bool is_interface,
5324 bool is_value_type,
5325 TRAPS) const {
5326 if (!_need_verify) { return; }
5327
5328 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
5329 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
5330 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
5331 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
5332 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
5333 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
5334 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
5335 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
5336 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
5337
5338 bool is_illegal = false;
5339
5340 if (is_interface) {
5341 if (!is_public || !is_static || !is_final || is_private ||
5342 is_protected || is_volatile || is_transient ||
5343 (major_gte_1_5 && is_enum)) {
5344 is_illegal = true;
5345 }
5346 } else { // not interface
5347 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
5348 is_illegal = true;
5349 } else {
5350 if (is_value_type && !is_static && !is_final) {
5351 is_illegal = true;
5352 }
5353 }
5354 }
5355
5356 if (is_illegal) {
5357 ResourceMark rm(THREAD);
5358 Exceptions::fthrow(
5359 THREAD_AND_LOCATION,
5360 vmSymbols::java_lang_ClassFormatError(),
5361 "Illegal field modifiers in class %s: 0x%X",
5362 _class_name->as_C_string(), flags);
5363 return;
5364 }
5365 }
5366
5367 void ClassFileParser::verify_legal_method_modifiers(jint flags,
5368 bool is_interface,
5369 bool is_value_type,
5370 const Symbol* name,
5371 TRAPS) const {
5372 if (!_need_verify) { return; }
5373
5374 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
5375 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
5376 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
5377 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
5378 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
5379 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
5380 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
5381 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
5382 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
5383 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
5384 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
5385 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
5386 const bool is_initializer = (name == vmSymbols::object_initializer_name());
5387
5388 bool is_illegal = false;
5389
5390 const char* class_note = "";
5391
5392 if (is_interface) {
5393 if (major_gte_8) {
5394 // Class file version is JAVA_8_VERSION or later Methods of
5395 // interfaces may set any of the flags except ACC_PROTECTED,
5396 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
5397 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
5398 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
5399 (is_native || is_protected || is_final || is_synchronized) ||
5400 // If a specific method of a class or interface has its
5401 // ACC_ABSTRACT flag set, it must not have any of its
5402 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
5403 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
5404 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
5405 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
5406 (is_abstract && (is_private || is_static || is_strict))) {
5407 is_illegal = true;
5408 }
5409 } else if (major_gte_1_5) {
5410 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
5411 if (!is_public || is_private || is_protected || is_static || is_final ||
5412 is_synchronized || is_native || !is_abstract || is_strict) {
5413 is_illegal = true;
5414 }
5415 } else {
5416 // Class file version is pre-JAVA_1_5_VERSION
5417 if (!is_public || is_static || is_final || is_native || !is_abstract) {
5418 is_illegal = true;
5419 }
5420 }
5421 } else { // not interface
5422 if (has_illegal_visibility(flags)) {
5423 is_illegal = true;
5424 } else {
5425 if (is_initializer) {
5426 if (is_final || is_synchronized || is_native ||
5427 is_abstract || (major_gte_1_5 && is_bridge)) {
5428 is_illegal = true;
5429 }
5430 if (!is_static && !is_value_type) {
5431 // OK, an object constructor in a regular class
5432 } else if (is_static && is_value_type) {
5433 // OK, a static init factory in an inline class
5434 } else {
5435 // but no other combinations are allowed
5436 is_illegal = true;
5437 class_note = (is_value_type ? " (an inline class)" : " (not an inline class)");
5438 }
5439 } else { // not initializer
5440 if (is_value_type && is_synchronized && !is_static) {
5441 is_illegal = true;
5442 class_note = " (an inline class)";
5443 } else {
5444 if (is_abstract) {
5445 if ((is_final || is_native || is_private || is_static ||
5446 (major_gte_1_5 && (is_synchronized || is_strict)))) {
5447 is_illegal = true;
5448 }
5449 }
5450 }
5451 }
5452 }
5453 }
5454
5455 if (is_illegal) {
5456 ResourceMark rm(THREAD);
5457 Exceptions::fthrow(
5458 THREAD_AND_LOCATION,
5459 vmSymbols::java_lang_ClassFormatError(),
5460 "Method %s in class %s%s has illegal modifiers: 0x%X",
5461 name->as_C_string(), _class_name->as_C_string(), class_note, flags);
5462 return;
5463 }
5464 }
5465
5466 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
5467 int length,
5468 TRAPS) const {
5469 assert(_need_verify, "only called when _need_verify is true");
5470 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
5471 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5472 }
5473 }
5474
5475 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5476 // In class names, '/' separates unqualified names. This is verified in this function also.
5477 // Method names also may not contain the characters '<' or '>', unless <init>
5478 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5479 // method. Because these names have been checked as special cases before
5480 // calling this method in verify_legal_method_name.
5481 //
5482 // This method is also called from the modular system APIs in modules.cpp
5483 // to verify the validity of module and package names.
5484 bool ClassFileParser::verify_unqualified_name(const char* name,
5485 unsigned int length,
5486 int type) {
5487 if (length == 0) return false; // Must have at least one char.
5488 for (const char* p = name; p != name + length; p++) {
5489 switch(*p) {
5490 case JVM_SIGNATURE_DOT:
5491 case JVM_SIGNATURE_ENDCLASS:
5492 case JVM_SIGNATURE_ARRAY:
5493 // do not permit '.', ';', or '['
5494 return false;
5495 case JVM_SIGNATURE_SLASH:
5496 // check for '//' or leading or trailing '/' which are not legal
5497 // unqualified name must not be empty
5498 if (type == ClassFileParser::LegalClass) {
5499 if (p == name || p+1 >= name+length ||
5500 *(p+1) == JVM_SIGNATURE_SLASH) {
5501 return false;
5502 }
5503 } else {
5504 return false; // do not permit '/' unless it's class name
5505 }
5506 break;
5507 case JVM_SIGNATURE_SPECIAL:
5508 case JVM_SIGNATURE_ENDSPECIAL:
5509 // do not permit '<' or '>' in method names
5510 if (type == ClassFileParser::LegalMethod) {
5511 return false;
5512 }
5513 }
5514 }
5515 return true;
5516 }
5517
5518 // Take pointer to a UTF8 byte string (not NUL-terminated).
5519 // Skip over the longest part of the string that could
5520 // be taken as a fieldname. Allow '/' if slash_ok is true.
5521 // Return a pointer to just past the fieldname.
5522 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5523 // being true, we saw consecutive slashes (meaning we were looking for a
5524 // qualified path but found something that was badly-formed).
5525 static const char* skip_over_field_name(const char* const name,
5526 bool slash_ok,
5527 unsigned int length) {
5528 const char* p;
5529 jboolean last_is_slash = false;
5530 jboolean not_first_ch = false;
5531
5532 for (p = name; p != name + length; not_first_ch = true) {
5533 const char* old_p = p;
5534 jchar ch = *p;
5535 if (ch < 128) {
5536 p++;
5537 // quick check for ascii
5538 if ((ch >= 'a' && ch <= 'z') ||
5539 (ch >= 'A' && ch <= 'Z') ||
5540 (ch == '_' || ch == '$') ||
5541 (not_first_ch && ch >= '0' && ch <= '9')) {
5542 last_is_slash = false;
5543 continue;
5544 }
5545 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
5546 if (last_is_slash) {
5547 return NULL; // Don't permit consecutive slashes
5548 }
5549 last_is_slash = true;
5550 continue;
5551 }
5552 }
5553 else {
5554 jint unicode_ch;
5555 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5556 p = tmp_p;
5557 last_is_slash = false;
5558 // Check if ch is Java identifier start or is Java identifier part
5559 // 4672820: call java.lang.Character methods directly without generating separate tables.
5560 EXCEPTION_MARK;
5561 // return value
5562 JavaValue result(T_BOOLEAN);
5563 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5564 JavaCallArguments args;
5565 args.push_int(unicode_ch);
5566
5567 if (not_first_ch) {
5568 // public static boolean isJavaIdentifierPart(char ch);
5569 JavaCalls::call_static(&result,
5570 SystemDictionary::Character_klass(),
5571 vmSymbols::isJavaIdentifierPart_name(),
5572 vmSymbols::int_bool_signature(),
5573 &args,
5574 THREAD);
5575 } else {
5576 // public static boolean isJavaIdentifierStart(char ch);
5577 JavaCalls::call_static(&result,
5578 SystemDictionary::Character_klass(),
5579 vmSymbols::isJavaIdentifierStart_name(),
5580 vmSymbols::int_bool_signature(),
5581 &args,
5582 THREAD);
5583 }
5584 if (HAS_PENDING_EXCEPTION) {
5585 CLEAR_PENDING_EXCEPTION;
5586 return NULL;
5587 }
5588 if(result.get_jboolean()) {
5589 continue;
5590 }
5591 }
5592 return (not_first_ch) ? old_p : NULL;
5593 }
5594 return (not_first_ch) ? p : NULL;
5595 }
5596
5597 // Take pointer to a UTF8 byte string (not NUL-terminated).
5598 // Skip over the longest part of the string that could
5599 // be taken as a field signature. Allow "void" if void_ok.
5600 // Return a pointer to just past the signature.
5601 // Return NULL if no legal signature is found.
5602 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5603 bool void_ok,
5604 unsigned int length,
5605 TRAPS) const {
5606 unsigned int array_dim = 0;
5607 while (length > 0) {
5608 switch (signature[0]) {
5609 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5610 case JVM_SIGNATURE_BOOLEAN:
5611 case JVM_SIGNATURE_BYTE:
5612 case JVM_SIGNATURE_CHAR:
5613 case JVM_SIGNATURE_SHORT:
5614 case JVM_SIGNATURE_INT:
5615 case JVM_SIGNATURE_FLOAT:
5616 case JVM_SIGNATURE_LONG:
5617 case JVM_SIGNATURE_DOUBLE:
5618 return signature + 1;
5619 case JVM_SIGNATURE_VALUETYPE:
5620 // Can't enable this check until JDK upgrades the bytecode generators
5621 // if (_major_version < CONSTANT_CLASS_DESCRIPTORS ) {
5622 // classfile_parse_error("Class name contains illegal Q-signature "
5623 // "in descriptor in class file %s",
5624 // CHECK_0);
5625 // }
5626 // fall through
5627 case JVM_SIGNATURE_CLASS:
5628 {
5629 if (_major_version < JAVA_1_5_VERSION) {
5630 // Skip over the class name if one is there
5631 const char* const p = skip_over_field_name(signature + 1, true, --length);
5632
5633 // The next character better be a semicolon
5634 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
5635 return p + 1;
5636 }
5637 }
5638 else {
5639 // Skip leading 'L' or 'Q' and ignore first appearance of ';'
5640 signature++;
5641 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
5642 // Format check signature
5643 if (c != NULL) {
5644 int newlen = c - (char*) signature;
5645 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5646 if (!legal) {
5647 classfile_parse_error("Class name is empty or contains illegal character "
5648 "in descriptor in class file %s",
5649 CHECK_0);
5650 return NULL;
5651 }
5652 return signature + newlen + 1;
5653 }
5654 }
5655 return NULL;
5656 }
5657 case JVM_SIGNATURE_ARRAY:
5658 array_dim++;
5659 if (array_dim > 255) {
5660 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5661 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5662 }
5663 // The rest of what's there better be a legal signature
5664 signature++;
5665 length--;
5666 void_ok = false;
5667 break;
5668 default:
5669 return NULL;
5670 }
5671 }
5672 return NULL;
5673 }
5674
5675 // Checks if name is a legal class name.
5676 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5677 if (!_need_verify || _relax_verify) { return; }
5678
5679 assert(name->refcount() > 0, "symbol must be kept alive");
5680 char* bytes = (char*)name->bytes();
5681 unsigned int length = name->utf8_length();
5682 bool legal = false;
5683
5684 if (length > 0) {
5685 const char* p;
5686 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5687 p = skip_over_field_signature(bytes, false, length, CHECK);
5688 legal = (p != NULL) && ((p - bytes) == (int)length);
5689 } else if (_major_version < JAVA_1_5_VERSION) {
5690 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5691 p = skip_over_field_name(bytes, true, length);
5692 legal = (p != NULL) && ((p - bytes) == (int)length);
5693 }
5694 } else if (_major_version >= CONSTANT_CLASS_DESCRIPTORS && bytes[length - 1] == ';' ) {
5695 // Support for L...; and Q...; descriptors
5696 legal = verify_unqualified_name(bytes + 1, length - 2, LegalClass);
5697 } else {
5698 // 4900761: relax the constraints based on JSR202 spec
5699 // Class names may be drawn from the entire Unicode character set.
5700 // Identifiers between '/' must be unqualified names.
5701 // The utf8 string has been verified when parsing cpool entries.
5702 legal = verify_unqualified_name(bytes, length, LegalClass);
5703 }
5704 }
5705 if (!legal) {
5706 ResourceMark rm(THREAD);
5707 assert(_class_name != NULL, "invariant");
5708 Exceptions::fthrow(
5709 THREAD_AND_LOCATION,
5710 vmSymbols::java_lang_ClassFormatError(),
5711 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5712 _class_name->as_C_string()
5713 );
5714 return;
5715 }
5716 }
5717
5718 // Checks if name is a legal field name.
5719 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5720 if (!_need_verify || _relax_verify) { return; }
5721
5722 char* bytes = (char*)name->bytes();
5723 unsigned int length = name->utf8_length();
5724 bool legal = false;
5725
5726 if (length > 0) {
5727 if (_major_version < JAVA_1_5_VERSION) {
5728 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5729 const char* p = skip_over_field_name(bytes, false, length);
5730 legal = (p != NULL) && ((p - bytes) == (int)length);
5731 }
5732 } else {
5733 // 4881221: relax the constraints based on JSR202 spec
5734 legal = verify_unqualified_name(bytes, length, LegalField);
5735 }
5736 }
5737
5738 if (!legal) {
5739 ResourceMark rm(THREAD);
5740 assert(_class_name != NULL, "invariant");
5741 Exceptions::fthrow(
5742 THREAD_AND_LOCATION,
5743 vmSymbols::java_lang_ClassFormatError(),
5744 "Illegal field name \"%.*s\" in class %s", length, bytes,
5745 _class_name->as_C_string()
5746 );
5747 return;
5748 }
5749 }
5750
5751 // Checks if name is a legal method name.
5752 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5753 if (!_need_verify || _relax_verify) { return; }
5754
5755 assert(name != NULL, "method name is null");
5756 char* bytes = (char*)name->bytes();
5757 unsigned int length = name->utf8_length();
5758 bool legal = false;
5759
5760 if (length > 0) {
5761 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
5762 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5763 legal = true;
5764 }
5765 } else if (_major_version < JAVA_1_5_VERSION) {
5766 const char* p;
5767 p = skip_over_field_name(bytes, false, length);
5768 legal = (p != NULL) && ((p - bytes) == (int)length);
5769 } else {
5770 // 4881221: relax the constraints based on JSR202 spec
5771 legal = verify_unqualified_name(bytes, length, LegalMethod);
5772 }
5773 }
5774
5775 if (!legal) {
5776 ResourceMark rm(THREAD);
5777 assert(_class_name != NULL, "invariant");
5778 Exceptions::fthrow(
5779 THREAD_AND_LOCATION,
5780 vmSymbols::java_lang_ClassFormatError(),
5781 "Illegal method name \"%.*s\" in class %s", length, bytes,
5782 _class_name->as_C_string()
5783 );
5784 return;
5785 }
5786 }
5787
5788
5789 // Checks if signature is a legal field signature.
5790 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5791 const Symbol* signature,
5792 TRAPS) const {
5793 if (!_need_verify) { return; }
5794
5795 const char* const bytes = (const char* const)signature->bytes();
5796 const unsigned int length = signature->utf8_length();
5797 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5798
5799 if (p == NULL || (p - bytes) != (int)length) {
5800 throwIllegalSignature("Field", name, signature, CHECK);
5801 }
5802 }
5803
5804 // Checks if signature is a legal method signature.
5805 // Returns number of parameters
5806 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5807 const Symbol* signature,
5808 TRAPS) const {
5809 if (!_need_verify) {
5810 // make sure caller's args_size will be less than 0 even for non-static
5811 // method so it will be recomputed in compute_size_of_parameters().
5812 return -2;
5813 }
5814
5815 // Class initializers cannot have args for class format version >= 51.
5816 if (name == vmSymbols::class_initializer_name() &&
5817 signature != vmSymbols::void_method_signature() &&
5818 _major_version >= JAVA_7_VERSION) {
5819 throwIllegalSignature("Method", name, signature, CHECK_0);
5820 return 0;
5821 }
5822
5823 unsigned int args_size = 0;
5824 const char* p = (const char*)signature->bytes();
5825 unsigned int length = signature->utf8_length();
5826 const char* nextp;
5827
5828 // The first character must be a '('
5829 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5830 length--;
5831 // Skip over legal field signatures
5832 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5833 while ((length > 0) && (nextp != NULL)) {
5834 args_size++;
5835 if (p[0] == 'J' || p[0] == 'D') {
5836 args_size++;
5837 }
5838 length -= nextp - p;
5839 p = nextp;
5840 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5841 }
5842 // The first non-signature thing better be a ')'
5843 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5844 length--;
5845 if (name->utf8_length() > 0 && name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
5846 // All constructor methods must return void
5847 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5848 return args_size;
5849 }
5850 // All static init methods must return the current class
5851 if ((length >= 3) && (p[length-1] == JVM_SIGNATURE_ENDCLASS)
5852 && name == vmSymbols::object_initializer_name()) {
5853 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5854 if (nextp && ((int)length == (nextp - p))) {
5855 // The actual class will be checked against current class
5856 // when the method is defined (see parse_method).
5857 // A reference to a static init with a bad return type
5858 // will load and verify OK, but will fail to link.
5859 return args_size;
5860 }
5861 }
5862 // The distinction between static factory methods and
5863 // constructors depends on the JVM_ACC_STATIC modifier.
5864 // This distinction must be reflected in a void or non-void
5865 // return. For declared methods, the check is in parse_method.
5866 } else {
5867 // Now we better just have a return value
5868 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5869 if (nextp && ((int)length == (nextp - p))) {
5870 return args_size;
5871 }
5872 }
5873 }
5874 }
5875 // Report error
5876 throwIllegalSignature("Method", name, signature, CHECK_0);
5877 return 0;
5878 }
5879
5880 int ClassFileParser::static_field_size() const {
5881 assert(_field_info != NULL, "invariant");
5882 return _field_info->_static_field_size;
5883 }
5884
5885 int ClassFileParser::total_oop_map_count() const {
5886 assert(_field_info != NULL, "invariant");
5887 return _field_info->oop_map_blocks->_nonstatic_oop_map_count;
5888 }
5889
5890 jint ClassFileParser::layout_size() const {
5891 assert(_field_info != NULL, "invariant");
5892 return _field_info->_instance_size;
5893 }
5894
5895 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5896 const Array<Method*>* methods) {
5897 assert(ik != NULL, "invariant");
5898 assert(methods != NULL, "invariant");
5899
5900 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5901 // (We used to do this lazily, but now we query it in Rewriter,
5902 // which is eagerly done for every method, so we might as well do it now,
5903 // when everything is fresh in memory.)
5904 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5905
5906 if (klass_id != vmSymbols::NO_SID) {
5907 for (int j = 0; j < methods->length(); ++j) {
5908 Method* method = methods->at(j);
5909 method->init_intrinsic_id();
5910
5911 if (CheckIntrinsics) {
5912 // Check if an intrinsic is defined for method 'method',
5913 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5914 if (method->intrinsic_id() != vmIntrinsics::_none &&
5915 !method->intrinsic_candidate()) {
5916 tty->print("Compiler intrinsic is defined for method [%s], "
5917 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5918 method->name_and_sig_as_C_string(),
5919 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5920 );
5921 tty->cr();
5922 DEBUG_ONLY(vm_exit(1));
5923 }
5924 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5925 // but there is no intrinsic available for it.
5926 if (method->intrinsic_candidate() &&
5927 method->intrinsic_id() == vmIntrinsics::_none) {
5928 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5929 "but no compiler intrinsic is defined for the method.%s",
5930 method->name_and_sig_as_C_string(),
5931 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5932 );
5933 tty->cr();
5934 DEBUG_ONLY(vm_exit(1));
5935 }
5936 }
5937 } // end for
5938
5939 #ifdef ASSERT
5940 if (CheckIntrinsics) {
5941 // Check for orphan methods in the current class. A method m
5942 // of a class C is orphan if an intrinsic is defined for method m,
5943 // but class C does not declare m.
5944 // The check is potentially expensive, therefore it is available
5945 // only in debug builds.
5946
5947 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5948 if (vmIntrinsics::_compiledLambdaForm == id) {
5949 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5950 // generated for the JVM from a LambdaForm and therefore no method
5951 // is defined for it.
5952 continue;
5953 }
5954
5955 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5956 // Check if the current class contains a method with the same
5957 // name, flags, signature.
5958 bool match = false;
5959 for (int j = 0; j < methods->length(); ++j) {
5960 const Method* method = methods->at(j);
5961 if (method->intrinsic_id() == id) {
5962 match = true;
5963 break;
5964 }
5965 }
5966
5967 if (!match) {
5968 char buf[1000];
5969 tty->print("Compiler intrinsic is defined for method [%s], "
5970 "but the method is not available in class [%s].%s",
5971 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5972 buf, sizeof(buf)),
5973 ik->name()->as_C_string(),
5974 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5975 );
5976 tty->cr();
5977 DEBUG_ONLY(vm_exit(1));
5978 }
5979 }
5980 } // end for
5981 } // CheckIntrinsics
5982 #endif // ASSERT
5983 }
5984 }
5985
5986 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5987 if (_klass != NULL) {
5988 return _klass;
5989 }
5990
5991 InstanceKlass* const ik =
5992 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5993
5994 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5995
5996 assert(_klass == ik, "invariant");
5997
5998
5999 if (ik->should_store_fingerprint()) {
6000 ik->store_fingerprint(_stream->compute_fingerprint());
6001 }
6002
6003 ik->set_has_passed_fingerprint_check(false);
6004 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
6005 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
6006 uint64_t fp = ik->has_stored_fingerprint() ? ik->get_stored_fingerprint() : _stream->compute_fingerprint();
6007 if (aot_fp != 0 && aot_fp == fp) {
6008 // This class matches with a class saved in an AOT library
6009 ik->set_has_passed_fingerprint_check(true);
6010 } else {
6011 ResourceMark rm;
6012 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
6013 ik->external_name(), aot_fp, _stream->compute_fingerprint());
6014 }
6015 }
6016
6017 if (ik->is_value()) {
6018 ValueKlass* vk = ValueKlass::cast(ik);
6019 oop val = ik->allocate_instance(CHECK_NULL);
6020 vk->set_default_value(val);
6021 }
6022
6023 return ik;
6024 }
6025
6026 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
6027 assert(ik != NULL, "invariant");
6028
6029 // Set name and CLD before adding to CLD
6030 ik->set_class_loader_data(_loader_data);
6031 ik->set_name(_class_name);
6032
6033 // Add all classes to our internal class loader list here,
6034 // including classes in the bootstrap (NULL) class loader.
6035 const bool publicize = !is_internal();
6036
6037 _loader_data->add_class(ik, publicize);
6038
6039 set_klass_to_deallocate(ik);
6040
6041 assert(_field_info != NULL, "invariant");
6042 assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
6043 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
6044 "sanity");
6045
6046 assert(ik->is_instance_klass(), "sanity");
6047 assert(ik->size_helper() == _field_info->_instance_size, "sanity");
6048
6049 // Fill in information already parsed
6050 ik->set_should_verify_class(_need_verify);
6051
6052 // Not yet: supers are done below to support the new subtype-checking fields
6053 ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
6054 ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
6055 if (_is_empty_value) {
6056 ik->set_is_empty_value();
6057 }
6058 assert(_fac != NULL, "invariant");
6059 ik->set_static_oop_field_count(_fac->count[STATIC_OOP] + _fac->count[STATIC_FLATTENABLE]);
6060
6061 // this transfers ownership of a lot of arrays from
6062 // the parser onto the InstanceKlass*
6063 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
6064
6065 // note that is not safe to use the fields in the parser from this point on
6066 assert(NULL == _cp, "invariant");
6067 assert(NULL == _fields, "invariant");
6068 assert(NULL == _methods, "invariant");
6069 assert(NULL == _inner_classes, "invariant");
6070 assert(NULL == _nest_members, "invariant");
6071 assert(NULL == _local_interfaces, "invariant");
6072 assert(NULL == _combined_annotations, "invariant");
6073 assert(NULL == _record_components, "invariant");
6074
6075 if (_has_final_method) {
6076 ik->set_has_final_method();
6077 }
6078
6079 ik->copy_method_ordering(_method_ordering, CHECK);
6080 // The InstanceKlass::_methods_jmethod_ids cache
6081 // is managed on the assumption that the initial cache
6082 // size is equal to the number of methods in the class. If
6083 // that changes, then InstanceKlass::idnum_can_increment()
6084 // has to be changed accordingly.
6085 ik->set_initial_method_idnum(ik->methods()->length());
6086
6087 ik->set_this_class_index(_this_class_index);
6088
6089 if (is_unsafe_anonymous()) {
6090 // _this_class_index is a CONSTANT_Class entry that refers to this
6091 // anonymous class itself. If this class needs to refer to its own methods or
6092 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
6093 // _this_class_index. However, because this class is anonymous (it's
6094 // not stored in SystemDictionary), _this_class_index cannot be resolved
6095 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
6096 // Therefore, we must eagerly resolve _this_class_index now.
6097 ik->constants()->klass_at_put(_this_class_index, ik);
6098 }
6099
6100 ik->set_minor_version(_minor_version);
6101 ik->set_major_version(_major_version);
6102 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
6103 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
6104
6105 if (_unsafe_anonymous_host != NULL) {
6106 assert (ik->is_unsafe_anonymous(), "should be the same");
6107 ik->set_unsafe_anonymous_host(_unsafe_anonymous_host);
6108 }
6109
6110 // Set PackageEntry for this_klass
6111 oop cl = ik->class_loader();
6112 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
6113 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
6114 ik->set_package(cld, CHECK);
6115
6116 const Array<Method*>* const methods = ik->methods();
6117 assert(methods != NULL, "invariant");
6118 const int methods_len = methods->length();
6119
6120 check_methods_for_intrinsics(ik, methods);
6121
6122 // Fill in field values obtained by parse_classfile_attributes
6123 if (_parsed_annotations->has_any_annotations()) {
6124 _parsed_annotations->apply_to(ik);
6125 }
6126
6127 apply_parsed_class_attributes(ik);
6128
6129 // Miranda methods
6130 if ((_num_miranda_methods > 0) ||
6131 // if this class introduced new miranda methods or
6132 (_super_klass != NULL && _super_klass->has_miranda_methods())
6133 // super class exists and this class inherited miranda methods
6134 ) {
6135 ik->set_has_miranda_methods(); // then set a flag
6136 }
6137
6138 // Fill in information needed to compute superclasses.
6139 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
6140 ik->set_transitive_interfaces(_transitive_interfaces);
6141 _transitive_interfaces = NULL;
6142
6143 // Initialize itable offset tables
6144 klassItable::setup_itable_offset_table(ik);
6145
6146 // Compute transitive closure of interfaces this class implements
6147 // Do final class setup
6148 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
6149 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
6150 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
6151 }
6152
6153 if (_has_contended_fields || _parsed_annotations->is_contended() ||
6154 ( _super_klass != NULL && _super_klass->has_contended_annotations())) {
6155 ik->set_has_contended_annotations(true);
6156 }
6157
6158 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
6159 set_precomputed_flags(ik);
6160
6161 // check if this class can access its super class
6162 check_super_class_access(ik, CHECK);
6163
6164 // check if this class can access its superinterfaces
6165 check_super_interface_access(ik, CHECK);
6166
6167 // check if this class overrides any final method
6168 check_final_method_override(ik, CHECK);
6169
6170 // reject static interface methods prior to Java 8
6171 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
6172 check_illegal_static_method(ik, CHECK);
6173 }
6174
6175 // Obtain this_klass' module entry
6176 ModuleEntry* module_entry = ik->module();
6177 assert(module_entry != NULL, "module_entry should always be set");
6178
6179 // Obtain java.lang.Module
6180 Handle module_handle(THREAD, module_entry->module());
6181
6182 // Allocate mirror and initialize static fields
6183 // The create_mirror() call will also call compute_modifiers()
6184 java_lang_Class::create_mirror(ik,
6185 Handle(THREAD, _loader_data->class_loader()),
6186 module_handle,
6187 _protection_domain,
6188 CHECK);
6189
6190 assert(_all_mirandas != NULL, "invariant");
6191
6192 // Generate any default methods - default methods are public interface methods
6193 // that have a default implementation. This is new with Java 8.
6194 if (_has_nonstatic_concrete_methods) {
6195 DefaultMethods::generate_default_methods(ik,
6196 _all_mirandas,
6197 CHECK);
6198 }
6199
6200 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
6201 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
6202 !module_entry->has_default_read_edges()) {
6203 if (!module_entry->set_has_default_read_edges()) {
6204 // We won a potential race
6205 JvmtiExport::add_default_read_edges(module_handle, THREAD);
6206 }
6207 }
6208
6209 int nfields = ik->java_fields_count();
6210 if (ik->is_value()) nfields++;
6211 for (int i = 0; i < nfields; i++) {
6212 if (ik->field_is_flattenable(i)) {
6213 Symbol* klass_name = ik->field_signature(i)->fundamental_name(CHECK);
6214 // Inline classes for instance fields must have been pre-loaded
6215 // Inline classes for static fields might not have been loaded yet
6216 Klass* klass = SystemDictionary::find(klass_name,
6217 Handle(THREAD, ik->class_loader()),
6218 Handle(THREAD, ik->protection_domain()), CHECK);
6219 if (klass != NULL) {
6220 assert(klass->access_flags().is_value_type(), "Value type expected");
6221 ik->set_value_field_klass(i, klass);
6222 }
6223 klass_name->decrement_refcount();
6224 } else
6225 if (is_value_type() && ((ik->field_access_flags(i) & JVM_ACC_FIELD_INTERNAL) != 0)
6226 && ((ik->field_access_flags(i) & JVM_ACC_STATIC) != 0)) {
6227 ValueKlass::cast(ik)->set_default_value_offset(ik->field_offset(i));
6228 }
6229 }
6230
6231 if (is_value_type()) {
6232 ValueKlass* vk = ValueKlass::cast(ik);
6233 if (UseNewLayout) {
6234 vk->set_alignment(_alignment);
6235 vk->set_first_field_offset(_first_field_offset);
6236 vk->set_exact_size_in_bytes(_exact_size_in_bytes);
6237 } else {
6238 vk->set_first_field_offset(vk->first_field_offset_old());
6239 }
6240 ValueKlass::cast(ik)->initialize_calling_convention(CHECK);
6241 }
6242
6243 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
6244
6245 if (!is_internal()) {
6246 if (log_is_enabled(Info, class, load)) {
6247 ResourceMark rm;
6248 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
6249 ik->print_class_load_logging(_loader_data, module_name, _stream);
6250 }
6251
6252 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
6253 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
6254 log_is_enabled(Info, class, preview)) {
6255 ResourceMark rm;
6256 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
6257 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
6258 }
6259
6260 if (log_is_enabled(Debug, class, resolve)) {
6261 ResourceMark rm;
6262 // print out the superclass.
6263 const char * from = ik->external_name();
6264 if (ik->java_super() != NULL) {
6265 log_debug(class, resolve)("%s %s (super)",
6266 from,
6267 ik->java_super()->external_name());
6268 }
6269 // print out each of the interface classes referred to by this class.
6270 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
6271 if (local_interfaces != NULL) {
6272 const int length = local_interfaces->length();
6273 for (int i = 0; i < length; i++) {
6274 const InstanceKlass* const k = local_interfaces->at(i);
6275 const char * to = k->external_name();
6276 log_debug(class, resolve)("%s %s (interface)", from, to);
6277 }
6278 }
6279 }
6280 }
6281
6282 JFR_ONLY(INIT_ID(ik);)
6283
6284 // If we reach here, all is well.
6285 // Now remove the InstanceKlass* from the _klass_to_deallocate field
6286 // in order for it to not be destroyed in the ClassFileParser destructor.
6287 set_klass_to_deallocate(NULL);
6288
6289 // it's official
6290 set_klass(ik);
6291
6292 debug_only(ik->verify();)
6293 }
6294
6295 void ClassFileParser::update_class_name(Symbol* new_class_name) {
6296 // Decrement the refcount in the old name, since we're clobbering it.
6297 _class_name->decrement_refcount();
6298
6299 _class_name = new_class_name;
6300 // Increment the refcount of the new name.
6301 // Now the ClassFileParser owns this name and will decrement in
6302 // the destructor.
6303 _class_name->increment_refcount();
6304 }
6305
6306
6307 // For an unsafe anonymous class that is in the unnamed package, move it to its host class's
6308 // package by prepending its host class's package name to its class name and setting
6309 // its _class_name field.
6310 void ClassFileParser::prepend_host_package_name(const InstanceKlass* unsafe_anonymous_host, TRAPS) {
6311 ResourceMark rm(THREAD);
6312 assert(strrchr(_class_name->as_C_string(), JVM_SIGNATURE_SLASH) == NULL,
6313 "Unsafe anonymous class should not be in a package");
6314 const char* host_pkg_name =
6315 ClassLoader::package_from_name(unsafe_anonymous_host->name()->as_C_string(), NULL);
6316
6317 if (host_pkg_name != NULL) {
6318 int host_pkg_len = (int)strlen(host_pkg_name);
6319 int class_name_len = _class_name->utf8_length();
6320 int symbol_len = host_pkg_len + 1 + class_name_len;
6321 char* new_anon_name = NEW_RESOURCE_ARRAY(char, symbol_len + 1);
6322 int n = os::snprintf(new_anon_name, symbol_len + 1, "%s/%.*s",
6323 host_pkg_name, class_name_len, _class_name->base());
6324 assert(n == symbol_len, "Unexpected number of characters in string");
6325
6326 // Decrement old _class_name to avoid leaking.
6327 _class_name->decrement_refcount();
6328
6329 // Create a symbol and update the anonymous class name.
6330 // The new class name is created with a refcount of one. When installed into the InstanceKlass,
6331 // it'll be two and when the ClassFileParser destructor runs, it'll go back to one and get deleted
6332 // when the class is unloaded.
6333 _class_name = SymbolTable::new_symbol(new_anon_name, symbol_len);
6334 }
6335 }
6336
6337 // If the host class and the anonymous class are in the same package then do
6338 // nothing. If the anonymous class is in the unnamed package then move it to its
6339 // host's package. If the classes are in different packages then throw an IAE
6340 // exception.
6341 void ClassFileParser::fix_unsafe_anonymous_class_name(TRAPS) {
6342 assert(_unsafe_anonymous_host != NULL, "Expected an unsafe anonymous class");
6343
6344 const jbyte* anon_last_slash = UTF8::strrchr((const jbyte*)_class_name->base(),
6345 _class_name->utf8_length(), JVM_SIGNATURE_SLASH);
6346 if (anon_last_slash == NULL) { // Unnamed package
6347 prepend_host_package_name(_unsafe_anonymous_host, CHECK);
6348 } else {
6349 if (!_unsafe_anonymous_host->is_same_class_package(_unsafe_anonymous_host->class_loader(), _class_name)) {
6350 ResourceMark rm(THREAD);
6351 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
6352 err_msg("Host class %s and anonymous class %s are in different packages",
6353 _unsafe_anonymous_host->name()->as_C_string(), _class_name->as_C_string()));
6354 }
6355 }
6356 }
6357
6358 static bool relax_format_check_for(ClassLoaderData* loader_data) {
6359 bool trusted = (loader_data->is_the_null_class_loader_data() ||
6360 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
6361 bool need_verify =
6362 // verifyAll
6363 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
6364 // verifyRemote
6365 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
6366 return !need_verify;
6367 }
6368
6369 ClassFileParser::ClassFileParser(ClassFileStream* stream,
6370 Symbol* name,
6371 ClassLoaderData* loader_data,
6372 Handle protection_domain,
6373 const InstanceKlass* unsafe_anonymous_host,
6374 GrowableArray<Handle>* cp_patches,
6375 Publicity pub_level,
6376 TRAPS) :
6377 _stream(stream),
6378 _requested_name(name),
6379 _class_name(NULL),
6380 _loader_data(loader_data),
6381 _unsafe_anonymous_host(unsafe_anonymous_host),
6382 _cp_patches(cp_patches),
6383 _num_patched_klasses(0),
6384 _max_num_patched_klasses(0),
6385 _orig_cp_size(0),
6386 _first_patched_klass_resolved_index(0),
6387 _super_klass(),
6388 _cp(NULL),
6389 _fields(NULL),
6390 _methods(NULL),
6391 _inner_classes(NULL),
6392 _nest_members(NULL),
6393 _nest_host(0),
6394 _record_components(NULL),
6395 _local_interfaces(NULL),
6396 _transitive_interfaces(NULL),
6397 _combined_annotations(NULL),
6398 _class_annotations(NULL),
6399 _class_type_annotations(NULL),
6400 _fields_annotations(NULL),
6401 _fields_type_annotations(NULL),
6402 _klass(NULL),
6403 _klass_to_deallocate(NULL),
6404 _parsed_annotations(NULL),
6405 _fac(NULL),
6406 _field_info(NULL),
6407 _method_ordering(NULL),
6408 _all_mirandas(NULL),
6409 _vtable_size(0),
6410 _itable_size(0),
6411 _num_miranda_methods(0),
6412 _rt(REF_NONE),
6413 _protection_domain(protection_domain),
6414 _access_flags(),
6415 _pub_level(pub_level),
6416 _bad_constant_seen(0),
6417 _synthetic_flag(false),
6418 _sde_length(false),
6419 _sde_buffer(NULL),
6420 _sourcefile_index(0),
6421 _generic_signature_index(0),
6422 _major_version(0),
6423 _minor_version(0),
6424 _this_class_index(0),
6425 _super_class_index(0),
6426 _itfs_len(0),
6427 _java_fields_count(0),
6428 _need_verify(false),
6429 _relax_verify(false),
6430 _has_nonstatic_concrete_methods(false),
6431 _declares_nonstatic_concrete_methods(false),
6432 _has_final_method(false),
6433 _has_contended_fields(false),
6434 _has_flattenable_fields(false),
6435 _is_empty_value(false),
6436 _has_finalizer(false),
6437 _has_empty_finalizer(false),
6438 _has_vanilla_constructor(false),
6439 _max_bootstrap_specifier_index(-1) {
6440
6441 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
6442 _class_name->increment_refcount();
6443
6444 assert(THREAD->is_Java_thread(), "invariant");
6445 assert(_loader_data != NULL, "invariant");
6446 assert(stream != NULL, "invariant");
6447 assert(_stream != NULL, "invariant");
6448 assert(_stream->buffer() == _stream->current(), "invariant");
6449 assert(_class_name != NULL, "invariant");
6450 assert(0 == _access_flags.as_int(), "invariant");
6451
6452 // Figure out whether we can skip format checking (matching classic VM behavior)
6453 if (DumpSharedSpaces) {
6454 // verify == true means it's a 'remote' class (i.e., non-boot class)
6455 // Verification decision is based on BytecodeVerificationRemote flag
6456 // for those classes.
6457 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
6458 BytecodeVerificationLocal;
6459 }
6460 else {
6461 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
6462 stream->need_verify());
6463 }
6464 if (_cp_patches != NULL) {
6465 int len = _cp_patches->length();
6466 for (int i=0; i<len; i++) {
6467 if (has_cp_patch_at(i)) {
6468 Handle patch = cp_patch_at(i);
6469 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
6470 // We need to append the names of the patched classes to the end of the constant pool,
6471 // because a patched class may have a Utf8 name that's not already included in the
6472 // original constant pool. These class names are used when patch_constant_pool()
6473 // calls patch_class().
6474 //
6475 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
6476 // At this point, we don't know the tag for index i yet, because we haven't parsed the
6477 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
6478 _max_num_patched_klasses++;
6479 }
6480 }
6481 }
6482 }
6483
6484 // synch back verification state to stream
6485 stream->set_verify(_need_verify);
6486
6487 // Check if verification needs to be relaxed for this class file
6488 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
6489 _relax_verify = relax_format_check_for(_loader_data);
6490
6491 parse_stream(stream, CHECK);
6492
6493 post_process_parsed_stream(stream, _cp, CHECK);
6494 }
6495
6496 void ClassFileParser::clear_class_metadata() {
6497 // metadata created before the instance klass is created. Must be
6498 // deallocated if classfile parsing returns an error.
6499 _cp = NULL;
6500 _fields = NULL;
6501 _methods = NULL;
6502 _inner_classes = NULL;
6503 _nest_members = NULL;
6504 _local_interfaces = NULL;
6505 _combined_annotations = NULL;
6506 _class_annotations = _class_type_annotations = NULL;
6507 _fields_annotations = _fields_type_annotations = NULL;
6508 _record_components = NULL;
6509 }
6510
6511 // Destructor to clean up
6512 ClassFileParser::~ClassFileParser() {
6513 _class_name->decrement_refcount();
6514
6515 if (_cp != NULL) {
6516 MetadataFactory::free_metadata(_loader_data, _cp);
6517 }
6518 if (_fields != NULL) {
6519 MetadataFactory::free_array<u2>(_loader_data, _fields);
6520 }
6521
6522 if (_methods != NULL) {
6523 // Free methods
6524 InstanceKlass::deallocate_methods(_loader_data, _methods);
6525 }
6526
6527 // beware of the Universe::empty_blah_array!!
6528 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
6529 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
6530 }
6531
6532 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
6533 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
6534 }
6535
6536 if (_record_components != NULL) {
6537 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
6538 }
6539
6540 // Free interfaces
6541 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
6542 _local_interfaces, _transitive_interfaces);
6543
6544 if (_combined_annotations != NULL) {
6545 // After all annotations arrays have been created, they are installed into the
6546 // Annotations object that will be assigned to the InstanceKlass being created.
6547
6548 // Deallocate the Annotations object and the installed annotations arrays.
6549 _combined_annotations->deallocate_contents(_loader_data);
6550
6551 // If the _combined_annotations pointer is non-NULL,
6552 // then the other annotations fields should have been cleared.
6553 assert(_class_annotations == NULL, "Should have been cleared");
6554 assert(_class_type_annotations == NULL, "Should have been cleared");
6555 assert(_fields_annotations == NULL, "Should have been cleared");
6556 assert(_fields_type_annotations == NULL, "Should have been cleared");
6557 } else {
6558 // If the annotations arrays were not installed into the Annotations object,
6559 // then they have to be deallocated explicitly.
6560 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
6561 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
6562 Annotations::free_contents(_loader_data, _fields_annotations);
6563 Annotations::free_contents(_loader_data, _fields_type_annotations);
6564 }
6565
6566 clear_class_metadata();
6567 _transitive_interfaces = NULL;
6568
6569 // deallocate the klass if already created. Don't directly deallocate, but add
6570 // to the deallocate list so that the klass is removed from the CLD::_klasses list
6571 // at a safepoint.
6572 if (_klass_to_deallocate != NULL) {
6573 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6574 }
6575 }
6576
6577 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6578 TRAPS) {
6579
6580 assert(stream != NULL, "invariant");
6581 assert(_class_name != NULL, "invariant");
6582
6583 // BEGIN STREAM PARSING
6584 stream->guarantee_more(8, CHECK); // magic, major, minor
6585 // Magic value
6586 const u4 magic = stream->get_u4_fast();
6587 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6588 "Incompatible magic value %u in class file %s",
6589 magic, CHECK);
6590
6591 // Version numbers
6592 _minor_version = stream->get_u2_fast();
6593 _major_version = stream->get_u2_fast();
6594
6595 if (DumpSharedSpaces && _major_version < JAVA_6_VERSION) {
6596 ResourceMark rm;
6597 warning("Pre JDK 6 class not supported by CDS: %u.%u %s",
6598 _major_version, _minor_version, _class_name->as_C_string());
6599 Exceptions::fthrow(
6600 THREAD_AND_LOCATION,
6601 vmSymbols::java_lang_UnsupportedClassVersionError(),
6602 "Unsupported major.minor version for dump time %u.%u",
6603 _major_version,
6604 _minor_version);
6605 }
6606
6607 // Check version numbers - we check this even with verifier off
6608 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
6609
6610 stream->guarantee_more(3, CHECK); // length, first cp tag
6611 u2 cp_size = stream->get_u2_fast();
6612
6613 guarantee_property(
6614 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6615 cp_size, CHECK);
6616
6617 _orig_cp_size = cp_size;
6618 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6619 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6620 }
6621 cp_size += _max_num_patched_klasses;
6622
6623 _cp = ConstantPool::allocate(_loader_data,
6624 cp_size,
6625 CHECK);
6626
6627 ConstantPool* const cp = _cp;
6628
6629 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6630
6631 assert(cp_size == (const u2)cp->length(), "invariant");
6632
6633 // ACCESS FLAGS
6634 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6635
6636 jint recognized_modifiers = JVM_RECOGNIZED_CLASS_MODIFIERS;
6637 // JVM_ACC_MODULE is defined in JDK-9 and later.
6638 if (_major_version >= JAVA_9_VERSION) {
6639 recognized_modifiers |= JVM_ACC_MODULE;
6640 }
6641 // JVM_ACC_VALUE is defined for class file version 55 and later
6642 if (supports_value_types()) {
6643 recognized_modifiers |= JVM_ACC_VALUE;
6644 }
6645
6646 // Access flags
6647 jint flags = stream->get_u2_fast() & recognized_modifiers;
6648
6649 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6650 // Set abstract bit for old class files for backward compatibility
6651 flags |= JVM_ACC_ABSTRACT;
6652 }
6653
6654 verify_legal_class_modifiers(flags, CHECK);
6655
6656 short bad_constant = class_bad_constant_seen();
6657 if (bad_constant != 0) {
6658 // Do not throw CFE until after the access_flags are checked because if
6659 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6660 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6661 }
6662
6663 _access_flags.set_flags(flags);
6664
6665 // This class and superclass
6666 _this_class_index = stream->get_u2_fast();
6667 check_property(
6668 valid_cp_range(_this_class_index, cp_size) &&
6669 cp->tag_at(_this_class_index).is_unresolved_klass(),
6670 "Invalid this class index %u in constant pool in class file %s",
6671 _this_class_index, CHECK);
6672
6673 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6674 assert(class_name_in_cp != NULL, "class_name can't be null");
6675
6676 // Update _class_name to reflect the name in the constant pool
6677 update_class_name(class_name_in_cp);
6678
6679 // Don't need to check whether this class name is legal or not.
6680 // It has been checked when constant pool is parsed.
6681 // However, make sure it is not an array type.
6682 if (_need_verify) {
6683 guarantee_property(_class_name->char_at(0) != JVM_SIGNATURE_ARRAY,
6684 "Bad class name in class file %s",
6685 CHECK);
6686 }
6687
6688 // Checks if name in class file matches requested name
6689 if (_requested_name != NULL && _requested_name != _class_name) {
6690 ResourceMark rm(THREAD);
6691 Exceptions::fthrow(
6692 THREAD_AND_LOCATION,
6693 vmSymbols::java_lang_NoClassDefFoundError(),
6694 "%s (wrong name: %s)",
6695 _class_name->as_C_string(),
6696 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6697 );
6698 return;
6699 }
6700
6701 // if this is an anonymous class fix up its name if it's in the unnamed
6702 // package. Otherwise, throw IAE if it is in a different package than
6703 // its host class.
6704 if (_unsafe_anonymous_host != NULL) {
6705 fix_unsafe_anonymous_class_name(CHECK);
6706 }
6707
6708 // Verification prevents us from creating names with dots in them, this
6709 // asserts that that's the case.
6710 assert(is_internal_format(_class_name), "external class name format used internally");
6711
6712 if (!is_internal()) {
6713 LogTarget(Debug, class, preorder) lt;
6714 if (lt.is_enabled()){
6715 ResourceMark rm(THREAD);
6716 LogStream ls(lt);
6717 ls.print("%s", _class_name->as_klass_external_name());
6718 if (stream->source() != NULL) {
6719 ls.print(" source: %s", stream->source());
6720 }
6721 ls.cr();
6722 }
6723
6724 #if INCLUDE_CDS
6725 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6726 if (!ClassLoader::has_jrt_entry()) {
6727 warning("DumpLoadedClassList and CDS are not supported in exploded build");
6728 DumpLoadedClassList = NULL;
6729 } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6730 _unsafe_anonymous_host == NULL) {
6731 // Only dump the classes that can be stored into CDS archive.
6732 // Unsafe anonymous classes such as generated LambdaForm classes are also not included.
6733 oop class_loader = _loader_data->class_loader();
6734 ResourceMark rm(THREAD);
6735 bool skip = false;
6736 if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6737 // For the boot and platform class loaders, skip classes that are not found in the
6738 // java runtime image, such as those found in the --patch-module entries.
6739 // These classes can't be loaded from the archive during runtime.
6740 if (!stream->from_boot_loader_modules_image() && strncmp(stream->source(), "jrt:", 4) != 0) {
6741 skip = true;
6742 }
6743
6744 if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6745 // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6746 // as they can be loaded from the archive during runtime.
6747 skip = false;
6748 }
6749 }
6750 if (skip) {
6751 tty->print_cr("skip writing class %s from source %s to classlist file",
6752 _class_name->as_C_string(), stream->source());
6753 } else {
6754 classlist_file->print_cr("%s", _class_name->as_C_string());
6755 classlist_file->flush();
6756 }
6757 }
6758 }
6759 #endif
6760 }
6761
6762 // SUPERKLASS
6763 _super_class_index = stream->get_u2_fast();
6764 _super_klass = parse_super_class(cp,
6765 _super_class_index,
6766 _need_verify,
6767 CHECK);
6768
6769 // Interfaces
6770 _itfs_len = stream->get_u2_fast();
6771 parse_interfaces(stream,
6772 _itfs_len,
6773 cp,
6774 &_has_nonstatic_concrete_methods,
6775 CHECK);
6776
6777 assert(_local_interfaces != NULL, "invariant");
6778
6779 // Fields (offsets are filled in later)
6780 _fac = new FieldAllocationCount();
6781 parse_fields(stream,
6782 _access_flags.is_interface(),
6783 _access_flags.is_value_type(),
6784 _fac,
6785 cp,
6786 cp_size,
6787 &_java_fields_count,
6788 CHECK);
6789
6790 assert(_fields != NULL, "invariant");
6791
6792 // Methods
6793 AccessFlags promoted_flags;
6794 parse_methods(stream,
6795 _access_flags.is_interface(),
6796 _access_flags.is_value_type(),
6797 &promoted_flags,
6798 &_has_final_method,
6799 &_declares_nonstatic_concrete_methods,
6800 CHECK);
6801
6802 assert(_methods != NULL, "invariant");
6803
6804 // promote flags from parse_methods() to the klass' flags
6805 _access_flags.add_promoted_flags(promoted_flags.as_int());
6806
6807 if (_declares_nonstatic_concrete_methods) {
6808 _has_nonstatic_concrete_methods = true;
6809 }
6810
6811 // Additional attributes/annotations
6812 _parsed_annotations = new ClassAnnotationCollector();
6813 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6814
6815 assert(_inner_classes != NULL, "invariant");
6816
6817 // Finalize the Annotations metadata object,
6818 // now that all annotation arrays have been created.
6819 create_combined_annotations(CHECK);
6820
6821 // Make sure this is the end of class file stream
6822 guarantee_property(stream->at_eos(),
6823 "Extra bytes at the end of class file %s",
6824 CHECK);
6825
6826 // all bytes in stream read and parsed
6827 }
6828
6829 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6830 ConstantPool* cp,
6831 TRAPS) {
6832 assert(stream != NULL, "invariant");
6833 assert(stream->at_eos(), "invariant");
6834 assert(cp != NULL, "invariant");
6835 assert(_loader_data != NULL, "invariant");
6836
6837 if (_class_name == vmSymbols::java_lang_Object()) {
6838 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6839 "java.lang.Object cannot implement an interface in class file %s",
6840 CHECK);
6841 }
6842 // We check super class after class file is parsed and format is checked
6843 if (_super_class_index > 0 && NULL ==_super_klass) {
6844 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6845 if (_access_flags.is_interface()) {
6846 // Before attempting to resolve the superclass, check for class format
6847 // errors not checked yet.
6848 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6849 "Interfaces must have java.lang.Object as superclass in class file %s",
6850 CHECK);
6851 }
6852 Handle loader(THREAD, _loader_data->class_loader());
6853 _super_klass = (const InstanceKlass*)
6854 SystemDictionary::resolve_super_or_fail(_class_name,
6855 super_class_name,
6856 loader,
6857 _protection_domain,
6858 true,
6859 CHECK);
6860 }
6861
6862 if (_super_klass != NULL) {
6863 if (_super_klass->has_nonstatic_concrete_methods()) {
6864 _has_nonstatic_concrete_methods = true;
6865 }
6866
6867 if (_super_klass->is_interface()) {
6868 ResourceMark rm(THREAD);
6869 Exceptions::fthrow(
6870 THREAD_AND_LOCATION,
6871 vmSymbols::java_lang_IncompatibleClassChangeError(),
6872 "class %s has interface %s as super class",
6873 _class_name->as_klass_external_name(),
6874 _super_klass->external_name()
6875 );
6876 return;
6877 }
6878
6879 // For a value class, only java/lang/Object is an acceptable super class
6880 if (_access_flags.get_flags() & JVM_ACC_VALUE) {
6881 guarantee_property(_super_klass->name() == vmSymbols::java_lang_Object(),
6882 "Value type must have java.lang.Object as superclass in class file %s",
6883 CHECK);
6884 }
6885
6886 // Make sure super class is not final
6887 if (_super_klass->is_final()) {
6888 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6889 }
6890 }
6891
6892 // Compute the transitive list of all unique interfaces implemented by this class
6893 _transitive_interfaces =
6894 compute_transitive_interfaces(_super_klass,
6895 _local_interfaces,
6896 _loader_data,
6897 CHECK);
6898
6899 assert(_transitive_interfaces != NULL, "invariant");
6900
6901 // sort methods
6902 _method_ordering = sort_methods(_methods);
6903
6904 _all_mirandas = new GrowableArray<Method*>(20);
6905
6906 Handle loader(THREAD, _loader_data->class_loader());
6907 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6908 &_num_miranda_methods,
6909 _all_mirandas,
6910 _super_klass,
6911 _methods,
6912 _access_flags,
6913 _major_version,
6914 loader,
6915 _class_name,
6916 _local_interfaces,
6917 CHECK);
6918
6919 // Size of Java itable (in words)
6920 _itable_size = _access_flags.is_interface() ? 0 :
6921 klassItable::compute_itable_size(_transitive_interfaces);
6922
6923 assert(_fac != NULL, "invariant");
6924 assert(_parsed_annotations != NULL, "invariant");
6925
6926
6927 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
6928 if (fs.is_flattenable() && !fs.access_flags().is_static()) {
6929 // Pre-load value class
6930 Klass* klass = SystemDictionary::resolve_flattenable_field_or_fail(&fs,
6931 Handle(THREAD, _loader_data->class_loader()),
6932 _protection_domain, true, CHECK);
6933 assert(klass != NULL, "Sanity check");
6934 assert(klass->access_flags().is_value_type(), "Value type expected");
6935 _has_flattenable_fields = true;
6936 }
6937 }
6938
6939 _field_info = new FieldLayoutInfo();
6940 if (UseNewLayout) {
6941 FieldLayoutBuilder lb(class_name(), super_klass(), _cp, _fields,
6942 _parsed_annotations->is_contended(), is_value_type(),
6943 loader_data(), _protection_domain, _field_info);
6944 lb.build_layout(CHECK);
6945 if (is_value_type()) {
6946 _alignment = lb.get_alignment();
6947 _first_field_offset = lb.get_first_field_offset();
6948 _exact_size_in_bytes = lb.get_exact_size_in_byte();
6949 }
6950 } else {
6951 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6952 }
6953
6954 // Compute reference type
6955 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6956
6957 }
6958
6959 void ClassFileParser::set_klass(InstanceKlass* klass) {
6960
6961 #ifdef ASSERT
6962 if (klass != NULL) {
6963 assert(NULL == _klass, "leaking?");
6964 }
6965 #endif
6966
6967 _klass = klass;
6968 }
6969
6970 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6971
6972 #ifdef ASSERT
6973 if (klass != NULL) {
6974 assert(NULL == _klass_to_deallocate, "leaking?");
6975 }
6976 #endif
6977
6978 _klass_to_deallocate = klass;
6979 }
6980
6981 // Caller responsible for ResourceMark
6982 // clone stream with rewound position
6983 const ClassFileStream* ClassFileParser::clone_stream() const {
6984 assert(_stream != NULL, "invariant");
6985
6986 return _stream->clone();
6987 }
6988
6989 // ----------------------------------------------------------------------------
6990 // debugging
6991
6992 #ifdef ASSERT
6993
6994 // return true if class_name contains no '.' (internal format is '/')
6995 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6996 if (class_name != NULL) {
6997 ResourceMark rm;
6998 char* name = class_name->as_C_string();
6999 return strchr(name, JVM_SIGNATURE_DOT) == NULL;
7000 } else {
7001 return true;
7002 }
7003 }
7004
7005 #endif