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 #include "precompiled.hpp"
25 #include "jvm.h"
26 #include "aot/aotLoader.hpp"
27 #include "classfile/classFileParser.hpp"
28 #include "classfile/classFileStream.hpp"
29 #include "classfile/classLoader.hpp"
30 #include "classfile/classLoaderData.inline.hpp"
31 #include "classfile/defaultMethods.hpp"
32 #include "classfile/dictionary.hpp"
33 #include "classfile/fieldLayoutBuilder.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/moduleEntry.hpp"
36 #include "classfile/packageEntry.hpp"
37 #include "classfile/symbolTable.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/verificationType.hpp"
40 #include "classfile/verifier.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "logging/log.hpp"
43 #include "logging/logStream.hpp"
44 #include "memory/allocation.hpp"
45 #include "memory/metadataFactory.hpp"
46 #include "memory/oopFactory.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "memory/universe.hpp"
49 #include "oops/annotations.hpp"
50 #include "oops/constantPool.inline.hpp"
51 #include "oops/fieldStreams.inline.hpp"
52 #include "oops/instanceKlass.hpp"
53 #include "oops/instanceMirrorKlass.hpp"
54 #include "oops/klass.inline.hpp"
55 #include "oops/klassVtable.hpp"
56 #include "oops/metadata.hpp"
57 #include "oops/method.inline.hpp"
58 #include "oops/oop.inline.hpp"
59 #include "oops/recordComponent.hpp"
60 #include "oops/symbol.hpp"
61 #include "prims/jvmtiExport.hpp"
62 #include "prims/jvmtiThreadState.hpp"
63 #include "runtime/arguments.hpp"
64 #include "runtime/fieldDescriptor.inline.hpp"
65 #include "runtime/handles.inline.hpp"
66 #include "runtime/javaCalls.hpp"
67 #include "runtime/os.hpp"
68 #include "runtime/perfData.hpp"
69 #include "runtime/reflection.hpp"
70 #include "runtime/safepointVerifiers.hpp"
71 #include "runtime/signature.hpp"
72 #include "runtime/timer.hpp"
73 #include "services/classLoadingService.hpp"
74 #include "services/threadService.hpp"
75 #include "utilities/align.hpp"
76 #include "utilities/bitMap.inline.hpp"
77 #include "utilities/copy.hpp"
78 #include "utilities/exceptions.hpp"
79 #include "utilities/globalDefinitions.hpp"
80 #include "utilities/growableArray.hpp"
81 #include "utilities/macros.hpp"
82 #include "utilities/ostream.hpp"
83 #include "utilities/resourceHash.hpp"
84 #include "utilities/utf8.hpp"
85
86 #if INCLUDE_CDS
87 #include "classfile/systemDictionaryShared.hpp"
88 #endif
89 #if INCLUDE_JFR
90 #include "jfr/support/jfrTraceIdExtension.hpp"
91 #endif
92
93 // We generally try to create the oops directly when parsing, rather than
94 // allocating temporary data structures and copying the bytes twice. A
95 // temporary area is only needed when parsing utf8 entries in the constant
96 // pool and when parsing line number tables.
97
98 // We add assert in debug mode when class format is not checked.
99
100 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
101 #define JAVA_MIN_SUPPORTED_VERSION 45
102 #define JAVA_PREVIEW_MINOR_VERSION 65535
103
104 // Used for two backward compatibility reasons:
105 // - to check for new additions to the class file format in JDK1.5
106 // - to check for bug fixes in the format checker in JDK1.5
107 #define JAVA_1_5_VERSION 49
108
109 // Used for backward compatibility reasons:
110 // - to check for javac bug fixes that happened after 1.5
111 // - also used as the max version when running in jdk6
112 #define JAVA_6_VERSION 50
113
114 // Used for backward compatibility reasons:
115 // - to disallow argument and require ACC_STATIC for <clinit> methods
116 #define JAVA_7_VERSION 51
117
118 // Extension method support.
119 #define JAVA_8_VERSION 52
120
121 #define JAVA_9_VERSION 53
122
123 #define JAVA_10_VERSION 54
124
125 #define JAVA_11_VERSION 55
126
127 #define JAVA_12_VERSION 56
128
129 #define JAVA_13_VERSION 57
130
131 #define JAVA_14_VERSION 58
132
133 #define JAVA_15_VERSION 59
134
135 #define JAVA_16_VERSION 60
136
137 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
138 assert((bad_constant == JVM_CONSTANT_Module ||
139 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
140 "Unexpected bad constant pool entry");
141 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
142 }
143
144 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
145 ConstantPool* cp,
146 const int length,
147 TRAPS) {
148 assert(stream != NULL, "invariant");
149 assert(cp != NULL, "invariant");
150
151 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
152 // this function (_current can be allocated in a register, with scalar
153 // replacement of aggregates). The _current pointer is copied back to
154 // stream() when this function returns. DON'T call another method within
155 // this method that uses stream().
156 const ClassFileStream cfs1 = *stream;
157 const ClassFileStream* const cfs = &cfs1;
158
159 assert(cfs->allocated_on_stack(), "should be local");
160 debug_only(const u1* const old_current = stream->current();)
161
162 // Used for batching symbol allocations.
163 const char* names[SymbolTable::symbol_alloc_batch_size];
164 int lengths[SymbolTable::symbol_alloc_batch_size];
165 int indices[SymbolTable::symbol_alloc_batch_size];
166 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
167 int names_count = 0;
168
169 // parsing Index 0 is unused
170 for (int index = 1; index < length; index++) {
171 // Each of the following case guarantees one more byte in the stream
172 // for the following tag or the access_flags following constant pool,
173 // so we don't need bounds-check for reading tag.
174 const u1 tag = cfs->get_u1_fast();
175 switch (tag) {
176 case JVM_CONSTANT_Class : {
177 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
178 const u2 name_index = cfs->get_u2_fast();
179 cp->klass_index_at_put(index, name_index);
180 break;
181 }
182 case JVM_CONSTANT_Fieldref: {
183 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
184 const u2 class_index = cfs->get_u2_fast();
185 const u2 name_and_type_index = cfs->get_u2_fast();
186 cp->field_at_put(index, class_index, name_and_type_index);
187 break;
188 }
189 case JVM_CONSTANT_Methodref: {
190 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
191 const u2 class_index = cfs->get_u2_fast();
192 const u2 name_and_type_index = cfs->get_u2_fast();
193 cp->method_at_put(index, class_index, name_and_type_index);
194 break;
195 }
196 case JVM_CONSTANT_InterfaceMethodref: {
197 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
198 const u2 class_index = cfs->get_u2_fast();
199 const u2 name_and_type_index = cfs->get_u2_fast();
200 cp->interface_method_at_put(index, class_index, name_and_type_index);
201 break;
202 }
203 case JVM_CONSTANT_String : {
204 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
205 const u2 string_index = cfs->get_u2_fast();
206 cp->string_index_at_put(index, string_index);
207 break;
208 }
209 case JVM_CONSTANT_MethodHandle :
210 case JVM_CONSTANT_MethodType: {
211 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
212 classfile_parse_error(
213 "Class file version does not support constant tag %u in class file %s",
214 tag, CHECK);
215 }
216 if (tag == JVM_CONSTANT_MethodHandle) {
217 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
218 const u1 ref_kind = cfs->get_u1_fast();
219 const u2 method_index = cfs->get_u2_fast();
220 cp->method_handle_index_at_put(index, ref_kind, method_index);
221 }
222 else if (tag == JVM_CONSTANT_MethodType) {
223 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
224 const u2 signature_index = cfs->get_u2_fast();
225 cp->method_type_index_at_put(index, signature_index);
226 }
227 else {
228 ShouldNotReachHere();
229 }
230 break;
231 }
232 case JVM_CONSTANT_Dynamic : {
233 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
234 classfile_parse_error(
235 "Class file version does not support constant tag %u in class file %s",
236 tag, CHECK);
237 }
238 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
239 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
240 const u2 name_and_type_index = cfs->get_u2_fast();
241 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
242 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
243 }
244 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
245 break;
246 }
247 case JVM_CONSTANT_InvokeDynamic : {
248 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
249 classfile_parse_error(
250 "Class file version does not support constant tag %u in class file %s",
251 tag, CHECK);
252 }
253 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
254 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
255 const u2 name_and_type_index = cfs->get_u2_fast();
256 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
257 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
258 }
259 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
260 break;
261 }
262 case JVM_CONSTANT_Integer: {
263 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
264 const u4 bytes = cfs->get_u4_fast();
265 cp->int_at_put(index, (jint)bytes);
266 break;
267 }
268 case JVM_CONSTANT_Float: {
269 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
270 const u4 bytes = cfs->get_u4_fast();
271 cp->float_at_put(index, *(jfloat*)&bytes);
272 break;
273 }
274 case JVM_CONSTANT_Long: {
275 // A mangled type might cause you to overrun allocated memory
276 guarantee_property(index + 1 < length,
277 "Invalid constant pool entry %u in class file %s",
278 index,
279 CHECK);
280 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
281 const u8 bytes = cfs->get_u8_fast();
282 cp->long_at_put(index, bytes);
283 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
284 break;
285 }
286 case JVM_CONSTANT_Double: {
287 // A mangled type might cause you to overrun allocated memory
288 guarantee_property(index+1 < length,
289 "Invalid constant pool entry %u in class file %s",
290 index,
291 CHECK);
292 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
293 const u8 bytes = cfs->get_u8_fast();
294 cp->double_at_put(index, *(jdouble*)&bytes);
295 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
296 break;
297 }
298 case JVM_CONSTANT_NameAndType: {
299 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
300 const u2 name_index = cfs->get_u2_fast();
301 const u2 signature_index = cfs->get_u2_fast();
302 cp->name_and_type_at_put(index, name_index, signature_index);
303 break;
304 }
305 case JVM_CONSTANT_Utf8 : {
306 cfs->guarantee_more(2, CHECK); // utf8_length
307 u2 utf8_length = cfs->get_u2_fast();
308 const u1* utf8_buffer = cfs->current();
309 assert(utf8_buffer != NULL, "null utf8 buffer");
310 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
311 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
312 cfs->skip_u1_fast(utf8_length);
313
314 // Before storing the symbol, make sure it's legal
315 if (_need_verify) {
316 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
317 }
318
319 if (has_cp_patch_at(index)) {
320 Handle patch = clear_cp_patch_at(index);
321 guarantee_property(java_lang_String::is_instance(patch()),
322 "Illegal utf8 patch at %d in class file %s",
323 index,
324 CHECK);
325 const char* const str = java_lang_String::as_utf8_string(patch());
326 // (could use java_lang_String::as_symbol instead, but might as well batch them)
327 utf8_buffer = (const u1*) str;
328 utf8_length = (u2) strlen(str);
329 }
330
331 unsigned int hash;
332 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
333 utf8_length,
334 hash);
335 if (result == NULL) {
336 names[names_count] = (const char*)utf8_buffer;
337 lengths[names_count] = utf8_length;
338 indices[names_count] = index;
339 hashValues[names_count++] = hash;
340 if (names_count == SymbolTable::symbol_alloc_batch_size) {
341 SymbolTable::new_symbols(_loader_data,
342 constantPoolHandle(THREAD, cp),
343 names_count,
344 names,
345 lengths,
346 indices,
347 hashValues);
348 names_count = 0;
349 }
350 } else {
351 cp->symbol_at_put(index, result);
352 }
353 break;
354 }
355 case JVM_CONSTANT_Module:
356 case JVM_CONSTANT_Package: {
357 // Record that an error occurred in these two cases but keep parsing so
358 // that ACC_Module can be checked for in the access_flags. Need to
359 // throw NoClassDefFoundError in that case.
360 if (_major_version >= JAVA_9_VERSION) {
361 cfs->guarantee_more(3, CHECK);
362 cfs->get_u2_fast();
363 set_class_bad_constant_seen(tag);
364 break;
365 }
366 }
367 default: {
368 classfile_parse_error("Unknown constant tag %u in class file %s",
369 tag,
370 CHECK);
371 break;
372 }
373 } // end of switch(tag)
374 } // end of for
375
376 // Allocate the remaining symbols
377 if (names_count > 0) {
378 SymbolTable::new_symbols(_loader_data,
379 constantPoolHandle(THREAD, cp),
380 names_count,
381 names,
382 lengths,
383 indices,
384 hashValues);
385 }
386
387 // Copy _current pointer of local copy back to stream.
388 assert(stream->current() == old_current, "non-exclusive use of stream");
389 stream->set_current(cfs1.current());
390
391 }
392
393 static inline bool valid_cp_range(int index, int length) {
394 return (index > 0 && index < length);
395 }
396
397 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
398 assert(cp != NULL, "invariant");
399 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
400 return cp->symbol_at(index);
401 }
402 return NULL;
403 }
404
405 #ifdef ASSERT
406 PRAGMA_DIAG_PUSH
407 PRAGMA_FORMAT_NONLITERAL_IGNORED
408 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
409 ResourceMark rm(THREAD);
410 fatal(msg, _class_name->as_C_string());
411 }
412
413 void ClassFileParser::report_assert_property_failure(const char* msg,
414 int index,
415 TRAPS) const {
416 ResourceMark rm(THREAD);
417 fatal(msg, index, _class_name->as_C_string());
418 }
419 PRAGMA_DIAG_POP
420 #endif
421
422 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
423 ConstantPool* const cp,
424 const int length,
425 TRAPS) {
426 assert(cp != NULL, "invariant");
427 assert(stream != NULL, "invariant");
428
429 // parsing constant pool entries
430 parse_constant_pool_entries(stream, cp, length, CHECK);
431 if (class_bad_constant_seen() != 0) {
432 // a bad CP entry has been detected previously so stop parsing and just return.
433 return;
434 }
435
436 int index = 1; // declared outside of loops for portability
437 int num_klasses = 0;
438
439 // first verification pass - validate cross references
440 // and fixup class and string constants
441 for (index = 1; index < length; index++) { // Index 0 is unused
442 const jbyte tag = cp->tag_at(index).value();
443 switch (tag) {
444 case JVM_CONSTANT_Class: {
445 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
446 break;
447 }
448 case JVM_CONSTANT_Fieldref:
449 // fall through
450 case JVM_CONSTANT_Methodref:
451 // fall through
452 case JVM_CONSTANT_InterfaceMethodref: {
453 if (!_need_verify) break;
454 const int klass_ref_index = cp->klass_ref_index_at(index);
455 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
456 check_property(valid_klass_reference_at(klass_ref_index),
457 "Invalid constant pool index %u in class file %s",
458 klass_ref_index, CHECK);
459 check_property(valid_cp_range(name_and_type_ref_index, length) &&
460 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
461 "Invalid constant pool index %u in class file %s",
462 name_and_type_ref_index, CHECK);
463 break;
464 }
465 case JVM_CONSTANT_String: {
466 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
467 break;
468 }
469 case JVM_CONSTANT_Integer:
470 break;
471 case JVM_CONSTANT_Float:
472 break;
473 case JVM_CONSTANT_Long:
474 case JVM_CONSTANT_Double: {
475 index++;
476 check_property(
477 (index < length && cp->tag_at(index).is_invalid()),
478 "Improper constant pool long/double index %u in class file %s",
479 index, CHECK);
480 break;
481 }
482 case JVM_CONSTANT_NameAndType: {
483 if (!_need_verify) break;
484 const int name_ref_index = cp->name_ref_index_at(index);
485 const int signature_ref_index = cp->signature_ref_index_at(index);
486 check_property(valid_symbol_at(name_ref_index),
487 "Invalid constant pool index %u in class file %s",
488 name_ref_index, CHECK);
489 check_property(valid_symbol_at(signature_ref_index),
490 "Invalid constant pool index %u in class file %s",
491 signature_ref_index, CHECK);
492 break;
493 }
494 case JVM_CONSTANT_Utf8:
495 break;
496 case JVM_CONSTANT_UnresolvedClass: // fall-through
497 case JVM_CONSTANT_UnresolvedClassInError: {
498 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
499 break;
500 }
501 case JVM_CONSTANT_ClassIndex: {
502 const int class_index = cp->klass_index_at(index);
503 check_property(valid_symbol_at(class_index),
504 "Invalid constant pool index %u in class file %s",
505 class_index, CHECK);
506 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
507 break;
508 }
509 case JVM_CONSTANT_StringIndex: {
510 const int string_index = cp->string_index_at(index);
511 check_property(valid_symbol_at(string_index),
512 "Invalid constant pool index %u in class file %s",
513 string_index, CHECK);
514 Symbol* const sym = cp->symbol_at(string_index);
515 cp->unresolved_string_at_put(index, sym);
516 break;
517 }
518 case JVM_CONSTANT_MethodHandle: {
519 const int ref_index = cp->method_handle_index_at(index);
520 check_property(valid_cp_range(ref_index, length),
521 "Invalid constant pool index %u in class file %s",
522 ref_index, CHECK);
523 const constantTag tag = cp->tag_at(ref_index);
524 const int ref_kind = cp->method_handle_ref_kind_at(index);
525
526 switch (ref_kind) {
527 case JVM_REF_getField:
528 case JVM_REF_getStatic:
529 case JVM_REF_putField:
530 case JVM_REF_putStatic: {
531 check_property(
532 tag.is_field(),
533 "Invalid constant pool index %u in class file %s (not a field)",
534 ref_index, CHECK);
535 break;
536 }
537 case JVM_REF_invokeVirtual:
538 case JVM_REF_newInvokeSpecial: {
539 check_property(
540 tag.is_method(),
541 "Invalid constant pool index %u in class file %s (not a method)",
542 ref_index, CHECK);
543 break;
544 }
545 case JVM_REF_invokeStatic:
546 case JVM_REF_invokeSpecial: {
547 check_property(
548 tag.is_method() ||
549 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_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_invokeInterface: {
555 check_property(
556 tag.is_interface_method(),
557 "Invalid constant pool index %u in class file %s (not an interface method)",
558 ref_index, CHECK);
559 break;
560 }
561 default: {
562 classfile_parse_error(
563 "Bad method handle kind at constant pool index %u in class file %s",
564 index, CHECK);
565 }
566 } // switch(refkind)
567 // Keep the ref_index unchanged. It will be indirected at link-time.
568 break;
569 } // case MethodHandle
570 case JVM_CONSTANT_MethodType: {
571 const int ref_index = cp->method_type_index_at(index);
572 check_property(valid_symbol_at(ref_index),
573 "Invalid constant pool index %u in class file %s",
574 ref_index, CHECK);
575 break;
576 }
577 case JVM_CONSTANT_Dynamic: {
578 const int name_and_type_ref_index =
579 cp->bootstrap_name_and_type_ref_index_at(index);
580
581 check_property(valid_cp_range(name_and_type_ref_index, length) &&
582 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
583 "Invalid constant pool index %u in class file %s",
584 name_and_type_ref_index, CHECK);
585 // bootstrap specifier index must be checked later,
586 // when BootstrapMethods attr is available
587
588 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
589 cp->set_has_dynamic_constant();
590 break;
591 }
592 case JVM_CONSTANT_InvokeDynamic: {
593 const int name_and_type_ref_index =
594 cp->bootstrap_name_and_type_ref_index_at(index);
595
596 check_property(valid_cp_range(name_and_type_ref_index, length) &&
597 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
598 "Invalid constant pool index %u in class file %s",
599 name_and_type_ref_index, CHECK);
600 // bootstrap specifier index must be checked later,
601 // when BootstrapMethods attr is available
602 break;
603 }
604 default: {
605 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
606 ShouldNotReachHere();
607 break;
608 }
609 } // switch(tag)
610 } // end of for
611
612 _first_patched_klass_resolved_index = num_klasses;
613 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
614
615 if (_cp_patches != NULL) {
616 // need to treat this_class specially...
617
618 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
619 // for now. These will be replaced with actual names of the patched classes in patch_class().
620 Symbol* s = vmSymbols::star_name();
621 for (int n=_orig_cp_size; n<cp->length(); n++) {
622 cp->symbol_at_put(n, s);
623 }
624
625 int this_class_index;
626 {
627 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
628 const u1* const mark = stream->current();
629 stream->skip_u2_fast(1); // skip flags
630 this_class_index = stream->get_u2_fast();
631 stream->set_current(mark); // revert to mark
632 }
633
634 for (index = 1; index < length; index++) { // Index 0 is unused
635 if (has_cp_patch_at(index)) {
636 guarantee_property(index != this_class_index,
637 "Illegal constant pool patch to self at %d in class file %s",
638 index, CHECK);
639 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
640 }
641 }
642 }
643
644 if (!_need_verify) {
645 return;
646 }
647
648 // second verification pass - checks the strings are of the right format.
649 // but not yet to the other entries
650 for (index = 1; index < length; index++) {
651 const jbyte tag = cp->tag_at(index).value();
652 switch (tag) {
653 case JVM_CONSTANT_UnresolvedClass: {
654 const Symbol* const class_name = cp->klass_name_at(index);
655 // check the name, even if _cp_patches will overwrite it
656 verify_legal_class_name(class_name, CHECK);
657 break;
658 }
659 case JVM_CONSTANT_NameAndType: {
660 if (_need_verify) {
661 const int sig_index = cp->signature_ref_index_at(index);
662 const int name_index = cp->name_ref_index_at(index);
663 const Symbol* const name = cp->symbol_at(name_index);
664 const Symbol* const sig = cp->symbol_at(sig_index);
665 guarantee_property(sig->utf8_length() != 0,
666 "Illegal zero length constant pool entry at %d in class %s",
667 sig_index, CHECK);
668 guarantee_property(name->utf8_length() != 0,
669 "Illegal zero length constant pool entry at %d in class %s",
670 name_index, CHECK);
671
672 if (Signature::is_method(sig)) {
673 // Format check method name and signature
674 verify_legal_method_name(name, CHECK);
675 verify_legal_method_signature(name, sig, CHECK);
676 } else {
677 // Format check field name and signature
678 verify_legal_field_name(name, CHECK);
679 verify_legal_field_signature(name, sig, CHECK);
680 }
681 }
682 break;
683 }
684 case JVM_CONSTANT_Dynamic: {
685 const int name_and_type_ref_index =
686 cp->name_and_type_ref_index_at(index);
687 // already verified to be utf8
688 const int name_ref_index =
689 cp->name_ref_index_at(name_and_type_ref_index);
690 // already verified to be utf8
691 const int signature_ref_index =
692 cp->signature_ref_index_at(name_and_type_ref_index);
693 const Symbol* const name = cp->symbol_at(name_ref_index);
694 const Symbol* const signature = cp->symbol_at(signature_ref_index);
695 if (_need_verify) {
696 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
697 // Need only to be sure signature is the right type.
698 if (Signature::is_method(signature)) {
699 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
700 }
701 }
702 break;
703 }
704 case JVM_CONSTANT_InvokeDynamic:
705 case JVM_CONSTANT_Fieldref:
706 case JVM_CONSTANT_Methodref:
707 case JVM_CONSTANT_InterfaceMethodref: {
708 const int name_and_type_ref_index =
709 cp->name_and_type_ref_index_at(index);
710 // already verified to be utf8
711 const int name_ref_index =
712 cp->name_ref_index_at(name_and_type_ref_index);
713 // already verified to be utf8
714 const int signature_ref_index =
715 cp->signature_ref_index_at(name_and_type_ref_index);
716 const Symbol* const name = cp->symbol_at(name_ref_index);
717 const Symbol* const signature = cp->symbol_at(signature_ref_index);
718 if (tag == JVM_CONSTANT_Fieldref) {
719 if (_need_verify) {
720 // Field name and signature are verified above, when iterating NameAndType_info.
721 // Need only to be sure signature is non-zero length and the right type.
722 if (Signature::is_method(signature)) {
723 throwIllegalSignature("Field", name, signature, CHECK);
724 }
725 }
726 } else {
727 if (_need_verify) {
728 // Method name and signature are verified above, when iterating NameAndType_info.
729 // Need only to be sure signature is non-zero length and the right type.
730 if (!Signature::is_method(signature)) {
731 throwIllegalSignature("Method", name, signature, CHECK);
732 }
733 }
734 // 4509014: If a class method name begins with '<', it must be "<init>"
735 const unsigned int name_len = name->utf8_length();
736 if (tag == JVM_CONSTANT_Methodref &&
737 name_len != 0 &&
738 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
739 name != vmSymbols::object_initializer_name()) {
740 classfile_parse_error(
741 "Bad method name at constant pool index %u in class file %s",
742 name_ref_index, CHECK);
743 }
744 }
745 break;
746 }
747 case JVM_CONSTANT_MethodHandle: {
748 const int ref_index = cp->method_handle_index_at(index);
749 const int ref_kind = cp->method_handle_ref_kind_at(index);
750 switch (ref_kind) {
751 case JVM_REF_invokeVirtual:
752 case JVM_REF_invokeStatic:
753 case JVM_REF_invokeSpecial:
754 case JVM_REF_newInvokeSpecial: {
755 const int name_and_type_ref_index =
756 cp->name_and_type_ref_index_at(ref_index);
757 const int name_ref_index =
758 cp->name_ref_index_at(name_and_type_ref_index);
759 const Symbol* const name = cp->symbol_at(name_ref_index);
760 if (ref_kind == JVM_REF_newInvokeSpecial) {
761 if (name != vmSymbols::object_initializer_name()) {
762 classfile_parse_error(
763 "Bad constructor name at constant pool index %u in class file %s",
764 name_ref_index, CHECK);
765 }
766 } else {
767 if (name == vmSymbols::object_initializer_name()) {
768 classfile_parse_error(
769 "Bad method name at constant pool index %u in class file %s",
770 name_ref_index, CHECK);
771 }
772 }
773 break;
774 }
775 // Other ref_kinds are already fully checked in previous pass.
776 } // switch(ref_kind)
777 break;
778 }
779 case JVM_CONSTANT_MethodType: {
780 const Symbol* const no_name = vmSymbols::type_name(); // place holder
781 const Symbol* const signature = cp->method_type_signature_at(index);
782 verify_legal_method_signature(no_name, signature, CHECK);
783 break;
784 }
785 case JVM_CONSTANT_Utf8: {
786 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
787 }
788 } // switch(tag)
789 } // end of for
790 }
791
792 Handle ClassFileParser::clear_cp_patch_at(int index) {
793 Handle patch = cp_patch_at(index);
794 _cp_patches->at_put(index, Handle());
795 assert(!has_cp_patch_at(index), "");
796 return patch;
797 }
798
799 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
800 int name_index = _orig_cp_size + _num_patched_klasses;
801 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
802
803 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
804 _num_patched_klasses ++;
805 }
806
807 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
808 int index,
809 Handle patch,
810 TRAPS) {
811 assert(cp != NULL, "invariant");
812
813 BasicType patch_type = T_VOID;
814
815 switch (cp->tag_at(index).value()) {
816
817 case JVM_CONSTANT_UnresolvedClass: {
818 // Patching a class means pre-resolving it.
819 // The name in the constant pool is ignored.
820 if (java_lang_Class::is_instance(patch())) {
821 guarantee_property(!java_lang_Class::is_primitive(patch()),
822 "Illegal class patch at %d in class file %s",
823 index, CHECK);
824 Klass* k = java_lang_Class::as_Klass(patch());
825 patch_class(cp, index, k, k->name());
826 } else {
827 guarantee_property(java_lang_String::is_instance(patch()),
828 "Illegal class patch at %d in class file %s",
829 index, CHECK);
830 Symbol* const name = java_lang_String::as_symbol(patch());
831 patch_class(cp, index, NULL, name);
832 }
833 break;
834 }
835
836 case JVM_CONSTANT_String: {
837 // skip this patch and don't clear it. Needs the oop array for resolved
838 // references to be created first.
839 return;
840 }
841 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
842 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
843 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
844 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
845 patch_prim:
846 {
847 jvalue value;
848 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
849 guarantee_property(value_type == patch_type,
850 "Illegal primitive patch at %d in class file %s",
851 index, CHECK);
852 switch (value_type) {
853 case T_INT: cp->int_at_put(index, value.i); break;
854 case T_FLOAT: cp->float_at_put(index, value.f); break;
855 case T_LONG: cp->long_at_put(index, value.j); break;
856 case T_DOUBLE: cp->double_at_put(index, value.d); break;
857 default: assert(false, "");
858 }
859 } // end patch_prim label
860 break;
861
862 default: {
863 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
864 guarantee_property(!has_cp_patch_at(index),
865 "Illegal unexpected patch at %d in class file %s",
866 index, CHECK);
867 return;
868 }
869 } // end of switch(tag)
870
871 // On fall-through, mark the patch as used.
872 clear_cp_patch_at(index);
873 }
874 class NameSigHash: public ResourceObj {
875 public:
876 const Symbol* _name; // name
877 const Symbol* _sig; // signature
878 NameSigHash* _next; // Next entry in hash table
879 };
880
881 static const int HASH_ROW_SIZE = 256;
882
883 static unsigned int hash(const Symbol* name, const Symbol* sig) {
884 unsigned int raw_hash = 0;
885 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
886 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
887
888 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
889 }
890
891
892 static void initialize_hashtable(NameSigHash** table) {
893 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
894 }
895 // Return false if the name/sig combination is found in table.
896 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
897 // The old format checker uses heap sort to find duplicates.
898 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
899 // of table since we don't expect Symbol*'s to move.
900 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
901 assert(name != NULL, "name in constant pool is NULL");
902
903 // First lookup for duplicates
904 int index = hash(name, sig);
905 NameSigHash* entry = table[index];
906 while (entry != NULL) {
907 if (entry->_name == name && entry->_sig == sig) {
908 return false;
909 }
910 entry = entry->_next;
911 }
912
913 // No duplicate is found, allocate a new entry and fill it.
914 entry = new NameSigHash();
915 entry->_name = name;
916 entry->_sig = sig;
917
918 // Insert into hash table
919 entry->_next = table[index];
920 table[index] = entry;
921
922 return true;
923 }
924
925 // Side-effects: populates the _local_interfaces field
926 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
927 const int itfs_len,
928 ConstantPool* const cp,
929 bool* const has_nonstatic_concrete_methods,
930 TRAPS) {
931 assert(stream != NULL, "invariant");
932 assert(cp != NULL, "invariant");
933 assert(has_nonstatic_concrete_methods != NULL, "invariant");
934
935 if (itfs_len == 0) {
936 _local_interfaces = Universe::the_empty_instance_klass_array();
937 } else {
938 assert(itfs_len > 0, "only called for len>0");
939 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
940
941 int index;
942 for (index = 0; index < itfs_len; index++) {
943 const u2 interface_index = stream->get_u2(CHECK);
944 Klass* interf;
945 check_property(
946 valid_klass_reference_at(interface_index),
947 "Interface name has bad constant pool index %u in class file %s",
948 interface_index, CHECK);
949 if (cp->tag_at(interface_index).is_klass()) {
950 interf = cp->resolved_klass_at(interface_index);
951 } else {
952 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
953
954 // Don't need to check legal name because it's checked when parsing constant pool.
955 // But need to make sure it's not an array type.
956 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
957 "Bad interface name in class file %s", CHECK);
958
959 // Call resolve_super so classcircularity is checked
960 interf = SystemDictionary::resolve_super_or_fail(
961 _class_name,
962 unresolved_klass,
963 Handle(THREAD, _loader_data->class_loader()),
964 _protection_domain,
965 false,
966 CHECK);
967 }
968
969 if (!interf->is_interface()) {
970 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
971 err_msg("class %s can not implement %s, because it is not an interface (%s)",
972 _class_name->as_klass_external_name(),
973 interf->external_name(),
974 interf->class_in_module_of_loader()));
975 }
976
977 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
978 *has_nonstatic_concrete_methods = true;
979 }
980 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
981 }
982
983 if (!_need_verify || itfs_len <= 1) {
984 return;
985 }
986
987 // Check if there's any duplicates in interfaces
988 ResourceMark rm(THREAD);
989 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
990 NameSigHash*,
991 HASH_ROW_SIZE);
992 initialize_hashtable(interface_names);
993 bool dup = false;
994 const Symbol* name = NULL;
995 {
996 debug_only(NoSafepointVerifier nsv;)
997 for (index = 0; index < itfs_len; index++) {
998 const InstanceKlass* const k = _local_interfaces->at(index);
999 name = k->name();
1000 // If no duplicates, add (name, NULL) in hashtable interface_names.
1001 if (!put_after_lookup(name, NULL, interface_names)) {
1002 dup = true;
1003 break;
1004 }
1005 }
1006 }
1007 if (dup) {
1008 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
1009 name->as_C_string(), CHECK);
1010 }
1011 }
1012 }
1013
1014 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
1015 int constantvalue_index,
1016 int signature_index,
1017 TRAPS) const {
1018 // Make sure the constant pool entry is of a type appropriate to this field
1019 guarantee_property(
1020 (constantvalue_index > 0 &&
1021 constantvalue_index < cp->length()),
1022 "Bad initial value index %u in ConstantValue attribute in class file %s",
1023 constantvalue_index, CHECK);
1024
1025 const constantTag value_type = cp->tag_at(constantvalue_index);
1026 switch(cp->basic_type_for_signature_at(signature_index)) {
1027 case T_LONG: {
1028 guarantee_property(value_type.is_long(),
1029 "Inconsistent constant value type in class file %s",
1030 CHECK);
1031 break;
1032 }
1033 case T_FLOAT: {
1034 guarantee_property(value_type.is_float(),
1035 "Inconsistent constant value type in class file %s",
1036 CHECK);
1037 break;
1038 }
1039 case T_DOUBLE: {
1040 guarantee_property(value_type.is_double(),
1041 "Inconsistent constant value type in class file %s",
1042 CHECK);
1043 break;
1044 }
1045 case T_BYTE:
1046 case T_CHAR:
1047 case T_SHORT:
1048 case T_BOOLEAN:
1049 case T_INT: {
1050 guarantee_property(value_type.is_int(),
1051 "Inconsistent constant value type in class file %s",
1052 CHECK);
1053 break;
1054 }
1055 case T_OBJECT: {
1056 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1057 && value_type.is_string()),
1058 "Bad string initial value in class file %s",
1059 CHECK);
1060 break;
1061 }
1062 default: {
1063 classfile_parse_error("Unable to set initial value %u in class file %s",
1064 constantvalue_index,
1065 CHECK);
1066 }
1067 }
1068 }
1069
1070 class AnnotationCollector : public ResourceObj{
1071 public:
1072 enum Location { _in_field, _in_method, _in_class };
1073 enum ID {
1074 _unknown = 0,
1075 _method_CallerSensitive,
1076 _method_ForceInline,
1077 _method_DontInline,
1078 _method_InjectedProfile,
1079 _method_LambdaForm_Compiled,
1080 _method_Hidden,
1081 _method_HotSpotIntrinsicCandidate,
1082 _jdk_internal_vm_annotation_Contended,
1083 _field_Stable,
1084 _jdk_internal_vm_annotation_ReservedStackAccess,
1085 _annotation_LIMIT
1086 };
1087 const Location _location;
1088 int _annotations_present;
1089 u2 _contended_group;
1090
1091 AnnotationCollector(Location location)
1092 : _location(location), _annotations_present(0)
1093 {
1094 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1095 }
1096 // If this annotation name has an ID, report it (or _none).
1097 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, bool can_access_vm_annotations);
1098 // Set the annotation name:
1099 void set_annotation(ID id) {
1100 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1101 _annotations_present |= nth_bit((int)id);
1102 }
1103
1104 void remove_annotation(ID id) {
1105 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1106 _annotations_present &= ~nth_bit((int)id);
1107 }
1108
1109 // Report if the annotation is present.
1110 bool has_any_annotations() const { return _annotations_present != 0; }
1111 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1112
1113 void set_contended_group(u2 group) { _contended_group = group; }
1114 u2 contended_group() const { return _contended_group; }
1115
1116 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1117
1118 void set_stable(bool stable) { set_annotation(_field_Stable); }
1119 bool is_stable() const { return has_annotation(_field_Stable); }
1120 };
1121
1122 // This class also doubles as a holder for metadata cleanup.
1123 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1124 private:
1125 ClassLoaderData* _loader_data;
1126 AnnotationArray* _field_annotations;
1127 AnnotationArray* _field_type_annotations;
1128 public:
1129 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1130 AnnotationCollector(_in_field),
1131 _loader_data(loader_data),
1132 _field_annotations(NULL),
1133 _field_type_annotations(NULL) {}
1134 ~FieldAnnotationCollector();
1135 void apply_to(FieldInfo* f);
1136 AnnotationArray* field_annotations() { return _field_annotations; }
1137 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1138
1139 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1140 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1141 };
1142
1143 class MethodAnnotationCollector : public AnnotationCollector{
1144 public:
1145 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1146 void apply_to(const methodHandle& m);
1147 };
1148
1149 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1150 public:
1151 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1152 void apply_to(InstanceKlass* ik);
1153 };
1154
1155
1156 static int skip_annotation_value(const u1*, int, int); // fwd decl
1157
1158 // Safely increment index by val if does not pass limit
1159 #define SAFE_ADD(index, limit, val) \
1160 if (index >= limit - val) return limit; \
1161 index += val;
1162
1163 // Skip an annotation. Return >=limit if there is any problem.
1164 static int skip_annotation(const u1* buffer, int limit, int index) {
1165 assert(buffer != NULL, "invariant");
1166 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1167 // value := switch (tag:u1) { ... }
1168 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1169 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1170 while (--nmem >= 0 && index < limit) {
1171 SAFE_ADD(index, limit, 2); // skip member
1172 index = skip_annotation_value(buffer, limit, index);
1173 }
1174 return index;
1175 }
1176
1177 // Skip an annotation value. Return >=limit if there is any problem.
1178 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1179 assert(buffer != NULL, "invariant");
1180
1181 // value := switch (tag:u1) {
1182 // case B, C, I, S, Z, D, F, J, c: con:u2;
1183 // case e: e_class:u2 e_name:u2;
1184 // case s: s_con:u2;
1185 // case [: do(nval:u2) {value};
1186 // case @: annotation;
1187 // case s: s_con:u2;
1188 // }
1189 SAFE_ADD(index, limit, 1); // read tag
1190 const u1 tag = buffer[index - 1];
1191 switch (tag) {
1192 case 'B':
1193 case 'C':
1194 case 'I':
1195 case 'S':
1196 case 'Z':
1197 case 'D':
1198 case 'F':
1199 case 'J':
1200 case 'c':
1201 case 's':
1202 SAFE_ADD(index, limit, 2); // skip con or s_con
1203 break;
1204 case 'e':
1205 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1206 break;
1207 case '[':
1208 {
1209 SAFE_ADD(index, limit, 2); // read nval
1210 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1211 while (--nval >= 0 && index < limit) {
1212 index = skip_annotation_value(buffer, limit, index);
1213 }
1214 }
1215 break;
1216 case '@':
1217 index = skip_annotation(buffer, limit, index);
1218 break;
1219 default:
1220 return limit; // bad tag byte
1221 }
1222 return index;
1223 }
1224
1225 // Sift through annotations, looking for those significant to the VM:
1226 static void parse_annotations(const ConstantPool* const cp,
1227 const u1* buffer, int limit,
1228 AnnotationCollector* coll,
1229 ClassLoaderData* loader_data,
1230 const bool can_access_vm_annotations,
1231 TRAPS) {
1232
1233 assert(cp != NULL, "invariant");
1234 assert(buffer != NULL, "invariant");
1235 assert(coll != NULL, "invariant");
1236 assert(loader_data != NULL, "invariant");
1237
1238 // annotations := do(nann:u2) {annotation}
1239 int index = 2; // read nann
1240 if (index >= limit) return;
1241 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1242 enum { // initial annotation layout
1243 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1244 count_off = 2, // u2 such as 1 (one value)
1245 member_off = 4, // utf8 such as 'value'
1246 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1247 e_tag_val = 'e',
1248 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1249 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1250 e_size = 11, // end of 'e' annotation
1251 c_tag_val = 'c', // payload is type
1252 c_con_off = 7, // utf8 payload, such as 'I'
1253 c_size = 9, // end of 'c' annotation
1254 s_tag_val = 's', // payload is String
1255 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1256 s_size = 9,
1257 min_size = 6 // smallest possible size (zero members)
1258 };
1259 // Cannot add min_size to index in case of overflow MAX_INT
1260 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1261 int index0 = index;
1262 index = skip_annotation(buffer, limit, index);
1263 const u1* const abase = buffer + index0;
1264 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1265 const int count = Bytes::get_Java_u2((address)abase + count_off);
1266 const Symbol* const aname = check_symbol_at(cp, atype);
1267 if (aname == NULL) break; // invalid annotation name
1268 const Symbol* member = NULL;
1269 if (count >= 1) {
1270 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1271 member = check_symbol_at(cp, member_index);
1272 if (member == NULL) break; // invalid member name
1273 }
1274
1275 // Here is where parsing particular annotations will take place.
1276 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname, can_access_vm_annotations);
1277 if (AnnotationCollector::_unknown == id) continue;
1278 coll->set_annotation(id);
1279
1280 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1281 // @Contended can optionally specify the contention group.
1282 //
1283 // Contended group defines the equivalence class over the fields:
1284 // the fields within the same contended group are not treated distinct.
1285 // The only exception is default group, which does not incur the
1286 // equivalence. Naturally, contention group for classes is meaningless.
1287 //
1288 // While the contention group is specified as String, annotation
1289 // values are already interned, and we might as well use the constant
1290 // pool index as the group tag.
1291 //
1292 u2 group_index = 0; // default contended group
1293 if (count == 1
1294 && s_size == (index - index0) // match size
1295 && s_tag_val == *(abase + tag_off)
1296 && member == vmSymbols::value_name()) {
1297 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1298 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1299 group_index = 0; // default contended group
1300 }
1301 }
1302 coll->set_contended_group(group_index);
1303 }
1304 }
1305 }
1306
1307
1308 // Parse attributes for a field.
1309 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1310 u2 attributes_count,
1311 bool is_static, u2 signature_index,
1312 u2* const constantvalue_index_addr,
1313 bool* const is_synthetic_addr,
1314 u2* const generic_signature_index_addr,
1315 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1316 TRAPS) {
1317 assert(cfs != NULL, "invariant");
1318 assert(constantvalue_index_addr != NULL, "invariant");
1319 assert(is_synthetic_addr != NULL, "invariant");
1320 assert(generic_signature_index_addr != NULL, "invariant");
1321 assert(parsed_annotations != NULL, "invariant");
1322 assert(attributes_count > 0, "attributes_count should be greater than 0");
1323
1324 u2 constantvalue_index = 0;
1325 u2 generic_signature_index = 0;
1326 bool is_synthetic = false;
1327 const u1* runtime_visible_annotations = NULL;
1328 int runtime_visible_annotations_length = 0;
1329 const u1* runtime_invisible_annotations = NULL;
1330 int runtime_invisible_annotations_length = 0;
1331 const u1* runtime_visible_type_annotations = NULL;
1332 int runtime_visible_type_annotations_length = 0;
1333 const u1* runtime_invisible_type_annotations = NULL;
1334 int runtime_invisible_type_annotations_length = 0;
1335 bool runtime_invisible_annotations_exists = false;
1336 bool runtime_invisible_type_annotations_exists = false;
1337 const ConstantPool* const cp = _cp;
1338
1339 while (attributes_count--) {
1340 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1341 const u2 attribute_name_index = cfs->get_u2_fast();
1342 const u4 attribute_length = cfs->get_u4_fast();
1343 check_property(valid_symbol_at(attribute_name_index),
1344 "Invalid field attribute index %u in class file %s",
1345 attribute_name_index,
1346 CHECK);
1347
1348 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1349 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1350 // ignore if non-static
1351 if (constantvalue_index != 0) {
1352 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1353 }
1354 check_property(
1355 attribute_length == 2,
1356 "Invalid ConstantValue field attribute length %u in class file %s",
1357 attribute_length, CHECK);
1358
1359 constantvalue_index = cfs->get_u2(CHECK);
1360 if (_need_verify) {
1361 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1362 }
1363 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1364 if (attribute_length != 0) {
1365 classfile_parse_error(
1366 "Invalid Synthetic field attribute length %u in class file %s",
1367 attribute_length, CHECK);
1368 }
1369 is_synthetic = true;
1370 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1371 if (attribute_length != 0) {
1372 classfile_parse_error(
1373 "Invalid Deprecated field attribute length %u in class file %s",
1374 attribute_length, CHECK);
1375 }
1376 } else if (_major_version >= JAVA_1_5_VERSION) {
1377 if (attribute_name == vmSymbols::tag_signature()) {
1378 if (generic_signature_index != 0) {
1379 classfile_parse_error(
1380 "Multiple Signature attributes for field in class file %s", CHECK);
1381 }
1382 if (attribute_length != 2) {
1383 classfile_parse_error(
1384 "Wrong size %u for field's Signature attribute in class file %s",
1385 attribute_length, CHECK);
1386 }
1387 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1388 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1389 if (runtime_visible_annotations != NULL) {
1390 classfile_parse_error(
1391 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1392 }
1393 runtime_visible_annotations_length = attribute_length;
1394 runtime_visible_annotations = cfs->current();
1395 assert(runtime_visible_annotations != NULL, "null visible annotations");
1396 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1397 parse_annotations(cp,
1398 runtime_visible_annotations,
1399 runtime_visible_annotations_length,
1400 parsed_annotations,
1401 _loader_data,
1402 _can_access_vm_annotations,
1403 CHECK);
1404 cfs->skip_u1_fast(runtime_visible_annotations_length);
1405 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1406 if (runtime_invisible_annotations_exists) {
1407 classfile_parse_error(
1408 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1409 }
1410 runtime_invisible_annotations_exists = true;
1411 if (PreserveAllAnnotations) {
1412 runtime_invisible_annotations_length = attribute_length;
1413 runtime_invisible_annotations = cfs->current();
1414 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1415 }
1416 cfs->skip_u1(attribute_length, CHECK);
1417 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1418 if (runtime_visible_type_annotations != NULL) {
1419 classfile_parse_error(
1420 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1421 }
1422 runtime_visible_type_annotations_length = attribute_length;
1423 runtime_visible_type_annotations = cfs->current();
1424 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1425 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1426 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1427 if (runtime_invisible_type_annotations_exists) {
1428 classfile_parse_error(
1429 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1430 } else {
1431 runtime_invisible_type_annotations_exists = true;
1432 }
1433 if (PreserveAllAnnotations) {
1434 runtime_invisible_type_annotations_length = attribute_length;
1435 runtime_invisible_type_annotations = cfs->current();
1436 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1437 }
1438 cfs->skip_u1(attribute_length, CHECK);
1439 } else {
1440 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1441 }
1442 } else {
1443 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1444 }
1445 }
1446
1447 *constantvalue_index_addr = constantvalue_index;
1448 *is_synthetic_addr = is_synthetic;
1449 *generic_signature_index_addr = generic_signature_index;
1450 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1451 runtime_visible_annotations_length,
1452 runtime_invisible_annotations,
1453 runtime_invisible_annotations_length,
1454 CHECK);
1455 parsed_annotations->set_field_annotations(a);
1456 a = assemble_annotations(runtime_visible_type_annotations,
1457 runtime_visible_type_annotations_length,
1458 runtime_invisible_type_annotations,
1459 runtime_invisible_type_annotations_length,
1460 CHECK);
1461 parsed_annotations->set_field_type_annotations(a);
1462 return;
1463 }
1464
1465
1466 // Field allocation types. Used for computing field offsets.
1467
1468 enum FieldAllocationType {
1469 STATIC_OOP, // Oops
1470 STATIC_BYTE, // Boolean, Byte, char
1471 STATIC_SHORT, // shorts
1472 STATIC_WORD, // ints
1473 STATIC_DOUBLE, // aligned long or double
1474 NONSTATIC_OOP,
1475 NONSTATIC_BYTE,
1476 NONSTATIC_SHORT,
1477 NONSTATIC_WORD,
1478 NONSTATIC_DOUBLE,
1479 MAX_FIELD_ALLOCATION_TYPE,
1480 BAD_ALLOCATION_TYPE = -1
1481 };
1482
1483 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1484 BAD_ALLOCATION_TYPE, // 0
1485 BAD_ALLOCATION_TYPE, // 1
1486 BAD_ALLOCATION_TYPE, // 2
1487 BAD_ALLOCATION_TYPE, // 3
1488 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1489 NONSTATIC_SHORT, // T_CHAR = 5,
1490 NONSTATIC_WORD, // T_FLOAT = 6,
1491 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1492 NONSTATIC_BYTE, // T_BYTE = 8,
1493 NONSTATIC_SHORT, // T_SHORT = 9,
1494 NONSTATIC_WORD, // T_INT = 10,
1495 NONSTATIC_DOUBLE, // T_LONG = 11,
1496 NONSTATIC_OOP, // T_OBJECT = 12,
1497 NONSTATIC_OOP, // T_ARRAY = 13,
1498 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1499 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1500 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1501 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1502 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1503 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1504 BAD_ALLOCATION_TYPE, // 0
1505 BAD_ALLOCATION_TYPE, // 1
1506 BAD_ALLOCATION_TYPE, // 2
1507 BAD_ALLOCATION_TYPE, // 3
1508 STATIC_BYTE , // T_BOOLEAN = 4,
1509 STATIC_SHORT, // T_CHAR = 5,
1510 STATIC_WORD, // T_FLOAT = 6,
1511 STATIC_DOUBLE, // T_DOUBLE = 7,
1512 STATIC_BYTE, // T_BYTE = 8,
1513 STATIC_SHORT, // T_SHORT = 9,
1514 STATIC_WORD, // T_INT = 10,
1515 STATIC_DOUBLE, // T_LONG = 11,
1516 STATIC_OOP, // T_OBJECT = 12,
1517 STATIC_OOP, // T_ARRAY = 13,
1518 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1519 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1520 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1521 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1522 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1523 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1524 };
1525
1526 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1527 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1528 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1529 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1530 return result;
1531 }
1532
1533 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1534 public:
1535 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1536
1537 FieldAllocationCount() {
1538 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1539 count[i] = 0;
1540 }
1541 }
1542
1543 FieldAllocationType update(bool is_static, BasicType type) {
1544 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1545 if (atype != BAD_ALLOCATION_TYPE) {
1546 // Make sure there is no overflow with injected fields.
1547 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1548 count[atype]++;
1549 }
1550 return atype;
1551 }
1552 };
1553
1554 // Side-effects: populates the _fields, _fields_annotations,
1555 // _fields_type_annotations fields
1556 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1557 bool is_interface,
1558 FieldAllocationCount* const fac,
1559 ConstantPool* cp,
1560 const int cp_size,
1561 u2* const java_fields_count_ptr,
1562 TRAPS) {
1563
1564 assert(cfs != NULL, "invariant");
1565 assert(fac != NULL, "invariant");
1566 assert(cp != NULL, "invariant");
1567 assert(java_fields_count_ptr != NULL, "invariant");
1568
1569 assert(NULL == _fields, "invariant");
1570 assert(NULL == _fields_annotations, "invariant");
1571 assert(NULL == _fields_type_annotations, "invariant");
1572
1573 cfs->guarantee_more(2, CHECK); // length
1574 const u2 length = cfs->get_u2_fast();
1575 *java_fields_count_ptr = length;
1576
1577 int num_injected = 0;
1578 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1579 &num_injected);
1580 const int total_fields = length + num_injected;
1581
1582 // The field array starts with tuples of shorts
1583 // [access, name index, sig index, initial value index, byte offset].
1584 // A generic signature slot only exists for field with generic
1585 // signature attribute. And the access flag is set with
1586 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1587 // signature slots are at the end of the field array and after all
1588 // other fields data.
1589 //
1590 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1591 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1592 // ...
1593 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1594 // [generic signature index]
1595 // [generic signature index]
1596 // ...
1597 //
1598 // Allocate a temporary resource array for field data. For each field,
1599 // a slot is reserved in the temporary array for the generic signature
1600 // index. After parsing all fields, the data are copied to a permanent
1601 // array and any unused slots will be discarded.
1602 ResourceMark rm(THREAD);
1603 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1604 u2,
1605 total_fields * (FieldInfo::field_slots + 1));
1606
1607 // The generic signature slots start after all other fields' data.
1608 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1609 int num_generic_signature = 0;
1610 for (int n = 0; n < length; n++) {
1611 // access_flags, name_index, descriptor_index, attributes_count
1612 cfs->guarantee_more(8, CHECK);
1613
1614 AccessFlags access_flags;
1615 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1616 verify_legal_field_modifiers(flags, is_interface, CHECK);
1617 access_flags.set_flags(flags);
1618
1619 const u2 name_index = cfs->get_u2_fast();
1620 check_property(valid_symbol_at(name_index),
1621 "Invalid constant pool index %u for field name in class file %s",
1622 name_index, CHECK);
1623 const Symbol* const name = cp->symbol_at(name_index);
1624 verify_legal_field_name(name, CHECK);
1625
1626 const u2 signature_index = cfs->get_u2_fast();
1627 check_property(valid_symbol_at(signature_index),
1628 "Invalid constant pool index %u for field signature in class file %s",
1629 signature_index, CHECK);
1630 const Symbol* const sig = cp->symbol_at(signature_index);
1631 verify_legal_field_signature(name, sig, CHECK);
1632
1633 u2 constantvalue_index = 0;
1634 bool is_synthetic = false;
1635 u2 generic_signature_index = 0;
1636 const bool is_static = access_flags.is_static();
1637 FieldAnnotationCollector parsed_annotations(_loader_data);
1638
1639 const u2 attributes_count = cfs->get_u2_fast();
1640 if (attributes_count > 0) {
1641 parse_field_attributes(cfs,
1642 attributes_count,
1643 is_static,
1644 signature_index,
1645 &constantvalue_index,
1646 &is_synthetic,
1647 &generic_signature_index,
1648 &parsed_annotations,
1649 CHECK);
1650
1651 if (parsed_annotations.field_annotations() != NULL) {
1652 if (_fields_annotations == NULL) {
1653 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1654 _loader_data, length, NULL,
1655 CHECK);
1656 }
1657 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1658 parsed_annotations.set_field_annotations(NULL);
1659 }
1660 if (parsed_annotations.field_type_annotations() != NULL) {
1661 if (_fields_type_annotations == NULL) {
1662 _fields_type_annotations =
1663 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1664 length,
1665 NULL,
1666 CHECK);
1667 }
1668 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1669 parsed_annotations.set_field_type_annotations(NULL);
1670 }
1671
1672 if (is_synthetic) {
1673 access_flags.set_is_synthetic();
1674 }
1675 if (generic_signature_index != 0) {
1676 access_flags.set_field_has_generic_signature();
1677 fa[generic_signature_slot] = generic_signature_index;
1678 generic_signature_slot ++;
1679 num_generic_signature ++;
1680 }
1681 }
1682
1683 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1684 field->initialize(access_flags.as_short(),
1685 name_index,
1686 signature_index,
1687 constantvalue_index);
1688 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1689
1690 // Remember how many oops we encountered and compute allocation type
1691 const FieldAllocationType atype = fac->update(is_static, type);
1692 field->set_allocation_type(atype);
1693
1694 // After field is initialized with type, we can augment it with aux info
1695 if (parsed_annotations.has_any_annotations()) {
1696 parsed_annotations.apply_to(field);
1697 if (field->is_contended()) {
1698 _has_contended_fields = true;
1699 }
1700 }
1701 }
1702
1703 int index = length;
1704 if (num_injected != 0) {
1705 for (int n = 0; n < num_injected; n++) {
1706 // Check for duplicates
1707 if (injected[n].may_be_java) {
1708 const Symbol* const name = injected[n].name();
1709 const Symbol* const signature = injected[n].signature();
1710 bool duplicate = false;
1711 for (int i = 0; i < length; i++) {
1712 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1713 if (name == cp->symbol_at(f->name_index()) &&
1714 signature == cp->symbol_at(f->signature_index())) {
1715 // Symbol is desclared in Java so skip this one
1716 duplicate = true;
1717 break;
1718 }
1719 }
1720 if (duplicate) {
1721 // These will be removed from the field array at the end
1722 continue;
1723 }
1724 }
1725
1726 // Injected field
1727 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1728 field->initialize(JVM_ACC_FIELD_INTERNAL,
1729 injected[n].name_index,
1730 injected[n].signature_index,
1731 0);
1732
1733 const BasicType type = Signature::basic_type(injected[n].signature());
1734
1735 // Remember how many oops we encountered and compute allocation type
1736 const FieldAllocationType atype = fac->update(false, type);
1737 field->set_allocation_type(atype);
1738 index++;
1739 }
1740 }
1741
1742 assert(NULL == _fields, "invariant");
1743
1744 _fields =
1745 MetadataFactory::new_array<u2>(_loader_data,
1746 index * FieldInfo::field_slots + num_generic_signature,
1747 CHECK);
1748 // Sometimes injected fields already exist in the Java source so
1749 // the fields array could be too long. In that case the
1750 // fields array is trimed. Also unused slots that were reserved
1751 // for generic signature indexes are discarded.
1752 {
1753 int i = 0;
1754 for (; i < index * FieldInfo::field_slots; i++) {
1755 _fields->at_put(i, fa[i]);
1756 }
1757 for (int j = total_fields * FieldInfo::field_slots;
1758 j < generic_signature_slot; j++) {
1759 _fields->at_put(i++, fa[j]);
1760 }
1761 assert(_fields->length() == i, "");
1762 }
1763
1764 if (_need_verify && length > 1) {
1765 // Check duplicated fields
1766 ResourceMark rm(THREAD);
1767 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1768 THREAD, NameSigHash*, HASH_ROW_SIZE);
1769 initialize_hashtable(names_and_sigs);
1770 bool dup = false;
1771 const Symbol* name = NULL;
1772 const Symbol* sig = NULL;
1773 {
1774 debug_only(NoSafepointVerifier nsv;)
1775 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1776 name = fs.name();
1777 sig = fs.signature();
1778 // If no duplicates, add name/signature in hashtable names_and_sigs.
1779 if (!put_after_lookup(name, sig, names_and_sigs)) {
1780 dup = true;
1781 break;
1782 }
1783 }
1784 }
1785 if (dup) {
1786 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1787 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1788 }
1789 }
1790 }
1791
1792
1793 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1794 u4 code_length,
1795 u4 exception_table_length,
1796 TRAPS) {
1797 assert(cfs != NULL, "invariant");
1798
1799 const unsafe_u2* const exception_table_start = cfs->current();
1800 assert(exception_table_start != NULL, "null exception table");
1801
1802 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1803 // end_pc,
1804 // handler_pc,
1805 // catch_type_index
1806
1807 // Will check legal target after parsing code array in verifier.
1808 if (_need_verify) {
1809 for (unsigned int i = 0; i < exception_table_length; i++) {
1810 const u2 start_pc = cfs->get_u2_fast();
1811 const u2 end_pc = cfs->get_u2_fast();
1812 const u2 handler_pc = cfs->get_u2_fast();
1813 const u2 catch_type_index = cfs->get_u2_fast();
1814 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1815 "Illegal exception table range in class file %s",
1816 CHECK_NULL);
1817 guarantee_property(handler_pc < code_length,
1818 "Illegal exception table handler in class file %s",
1819 CHECK_NULL);
1820 if (catch_type_index != 0) {
1821 guarantee_property(valid_klass_reference_at(catch_type_index),
1822 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1823 }
1824 }
1825 } else {
1826 cfs->skip_u2_fast(exception_table_length * 4);
1827 }
1828 return exception_table_start;
1829 }
1830
1831 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1832 u4 code_length,
1833 CompressedLineNumberWriteStream**const write_stream,
1834 TRAPS) {
1835
1836 const ClassFileStream* const cfs = _stream;
1837 unsigned int num_entries = cfs->get_u2(CHECK);
1838
1839 // Each entry is a u2 start_pc, and a u2 line_number
1840 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1841
1842 // Verify line number attribute and table length
1843 check_property(
1844 code_attribute_length == sizeof(u2) + length_in_bytes,
1845 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1846
1847 cfs->guarantee_more(length_in_bytes, CHECK);
1848
1849 if ((*write_stream) == NULL) {
1850 if (length_in_bytes > fixed_buffer_size) {
1851 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1852 } else {
1853 (*write_stream) = new CompressedLineNumberWriteStream(
1854 _linenumbertable_buffer, fixed_buffer_size);
1855 }
1856 }
1857
1858 while (num_entries-- > 0) {
1859 const u2 bci = cfs->get_u2_fast(); // start_pc
1860 const u2 line = cfs->get_u2_fast(); // line_number
1861 guarantee_property(bci < code_length,
1862 "Invalid pc in LineNumberTable in class file %s", CHECK);
1863 (*write_stream)->write_pair(bci, line);
1864 }
1865 }
1866
1867
1868 class LVT_Hash : public AllStatic {
1869 public:
1870
1871 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1872 /*
1873 * 3-tuple start_bci/length/slot has to be unique key,
1874 * so the following comparison seems to be redundant:
1875 * && elem->name_cp_index == entry->_elem->name_cp_index
1876 */
1877 return (e0.start_bci == e1.start_bci &&
1878 e0.length == e1.length &&
1879 e0.name_cp_index == e1.name_cp_index &&
1880 e0.slot == e1.slot);
1881 }
1882
1883 static unsigned int hash(LocalVariableTableElement const& e0) {
1884 unsigned int raw_hash = e0.start_bci;
1885
1886 raw_hash = e0.length + raw_hash * 37;
1887 raw_hash = e0.name_cp_index + raw_hash * 37;
1888 raw_hash = e0.slot + raw_hash * 37;
1889
1890 return raw_hash;
1891 }
1892 };
1893
1894
1895 // Class file LocalVariableTable elements.
1896 class Classfile_LVT_Element {
1897 public:
1898 u2 start_bci;
1899 u2 length;
1900 u2 name_cp_index;
1901 u2 descriptor_cp_index;
1902 u2 slot;
1903 };
1904
1905 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1906 LocalVariableTableElement* const lvt) {
1907 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1908 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1909 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1910 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1911 lvt->signature_cp_index = 0;
1912 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1913 }
1914
1915 // Function is used to parse both attributes:
1916 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1917 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1918 u4 code_length,
1919 u2 max_locals,
1920 u4 code_attribute_length,
1921 u2* const localvariable_table_length,
1922 bool isLVTT,
1923 TRAPS) {
1924 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1925 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1926 const unsigned int size =
1927 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1928
1929 const ConstantPool* const cp = _cp;
1930
1931 // Verify local variable table attribute has right length
1932 if (_need_verify) {
1933 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1934 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1935 }
1936
1937 const unsafe_u2* const localvariable_table_start = cfs->current();
1938 assert(localvariable_table_start != NULL, "null local variable table");
1939 if (!_need_verify) {
1940 cfs->skip_u2_fast(size);
1941 } else {
1942 cfs->guarantee_more(size * 2, CHECK_NULL);
1943 for(int i = 0; i < (*localvariable_table_length); i++) {
1944 const u2 start_pc = cfs->get_u2_fast();
1945 const u2 length = cfs->get_u2_fast();
1946 const u2 name_index = cfs->get_u2_fast();
1947 const u2 descriptor_index = cfs->get_u2_fast();
1948 const u2 index = cfs->get_u2_fast();
1949 // Assign to a u4 to avoid overflow
1950 const u4 end_pc = (u4)start_pc + (u4)length;
1951
1952 if (start_pc >= code_length) {
1953 classfile_parse_error(
1954 "Invalid start_pc %u in %s in class file %s",
1955 start_pc, tbl_name, CHECK_NULL);
1956 }
1957 if (end_pc > code_length) {
1958 classfile_parse_error(
1959 "Invalid length %u in %s in class file %s",
1960 length, tbl_name, CHECK_NULL);
1961 }
1962 const int cp_size = cp->length();
1963 guarantee_property(valid_symbol_at(name_index),
1964 "Name index %u in %s has bad constant type in class file %s",
1965 name_index, tbl_name, CHECK_NULL);
1966 guarantee_property(valid_symbol_at(descriptor_index),
1967 "Signature index %u in %s has bad constant type in class file %s",
1968 descriptor_index, tbl_name, CHECK_NULL);
1969
1970 const Symbol* const name = cp->symbol_at(name_index);
1971 const Symbol* const sig = cp->symbol_at(descriptor_index);
1972 verify_legal_field_name(name, CHECK_NULL);
1973 u2 extra_slot = 0;
1974 if (!isLVTT) {
1975 verify_legal_field_signature(name, sig, CHECK_NULL);
1976
1977 // 4894874: check special cases for double and long local variables
1978 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1979 sig == vmSymbols::type_signature(T_LONG)) {
1980 extra_slot = 1;
1981 }
1982 }
1983 guarantee_property((index + extra_slot) < max_locals,
1984 "Invalid index %u in %s in class file %s",
1985 index, tbl_name, CHECK_NULL);
1986 }
1987 }
1988 return localvariable_table_start;
1989 }
1990
1991 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1992 u4 code_attribute_length,
1993 bool need_verify,
1994 TRAPS) {
1995 assert(cfs != NULL, "invariant");
1996
1997 if (0 == code_attribute_length) {
1998 return NULL;
1999 }
2000
2001 const u1* const stackmap_table_start = cfs->current();
2002 assert(stackmap_table_start != NULL, "null stackmap table");
2003
2004 // check code_attribute_length first
2005 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2006
2007 if (!need_verify && !DumpSharedSpaces) {
2008 return NULL;
2009 }
2010 return stackmap_table_start;
2011 }
2012
2013 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2014 u2* const checked_exceptions_length,
2015 u4 method_attribute_length,
2016 TRAPS) {
2017 assert(cfs != NULL, "invariant");
2018 assert(checked_exceptions_length != NULL, "invariant");
2019
2020 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2021 *checked_exceptions_length = cfs->get_u2_fast();
2022 const unsigned int size =
2023 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2024 const unsafe_u2* const checked_exceptions_start = cfs->current();
2025 assert(checked_exceptions_start != NULL, "null checked exceptions");
2026 if (!_need_verify) {
2027 cfs->skip_u2_fast(size);
2028 } else {
2029 // Verify each value in the checked exception table
2030 u2 checked_exception;
2031 const u2 len = *checked_exceptions_length;
2032 cfs->guarantee_more(2 * len, CHECK_NULL);
2033 for (int i = 0; i < len; i++) {
2034 checked_exception = cfs->get_u2_fast();
2035 check_property(
2036 valid_klass_reference_at(checked_exception),
2037 "Exception name has bad type at constant pool %u in class file %s",
2038 checked_exception, CHECK_NULL);
2039 }
2040 }
2041 // check exceptions attribute length
2042 if (_need_verify) {
2043 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2044 sizeof(u2) * size),
2045 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2046 }
2047 return checked_exceptions_start;
2048 }
2049
2050 void ClassFileParser::throwIllegalSignature(const char* type,
2051 const Symbol* name,
2052 const Symbol* sig,
2053 TRAPS) const {
2054 assert(name != NULL, "invariant");
2055 assert(sig != NULL, "invariant");
2056
2057 ResourceMark rm(THREAD);
2058 Exceptions::fthrow(THREAD_AND_LOCATION,
2059 vmSymbols::java_lang_ClassFormatError(),
2060 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2061 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2062 }
2063
2064 AnnotationCollector::ID
2065 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2066 const Symbol* name,
2067 const bool can_access_vm_annotations) {
2068 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2069 // Privileged code can use all annotations. Other code silently drops some.
2070 const bool privileged = loader_data->is_boot_class_loader_data() ||
2071 loader_data->is_platform_class_loader_data() ||
2072 can_access_vm_annotations;
2073 switch (sid) {
2074 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2075 if (_location != _in_method) break; // only allow for methods
2076 if (!privileged) break; // only allow in privileged code
2077 return _method_CallerSensitive;
2078 }
2079 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2080 if (_location != _in_method) break; // only allow for methods
2081 if (!privileged) break; // only allow in privileged code
2082 return _method_ForceInline;
2083 }
2084 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2085 if (_location != _in_method) break; // only allow for methods
2086 if (!privileged) break; // only allow in privileged code
2087 return _method_DontInline;
2088 }
2089 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2090 if (_location != _in_method) break; // only allow for methods
2091 if (!privileged) break; // only allow in privileged code
2092 return _method_InjectedProfile;
2093 }
2094 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2095 if (_location != _in_method) break; // only allow for methods
2096 if (!privileged) break; // only allow in privileged code
2097 return _method_LambdaForm_Compiled;
2098 }
2099 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2100 if (_location != _in_method) break; // only allow for methods
2101 if (!privileged) break; // only allow in privileged code
2102 return _method_Hidden;
2103 }
2104 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2105 if (_location != _in_method) break; // only allow for methods
2106 if (!privileged) break; // only allow in privileged code
2107 return _method_HotSpotIntrinsicCandidate;
2108 }
2109 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2110 if (_location != _in_field) break; // only allow for fields
2111 if (!privileged) break; // only allow in privileged code
2112 return _field_Stable;
2113 }
2114 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2115 if (_location != _in_field && _location != _in_class) {
2116 break; // only allow for fields and classes
2117 }
2118 if (!EnableContended || (RestrictContended && !privileged)) {
2119 break; // honor privileges
2120 }
2121 return _jdk_internal_vm_annotation_Contended;
2122 }
2123 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2124 if (_location != _in_method) break; // only allow for methods
2125 if (RestrictReservedStack && !privileged) break; // honor privileges
2126 return _jdk_internal_vm_annotation_ReservedStackAccess;
2127 }
2128 default: {
2129 break;
2130 }
2131 }
2132 return AnnotationCollector::_unknown;
2133 }
2134
2135 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2136 if (is_contended())
2137 f->set_contended_group(contended_group());
2138 if (is_stable())
2139 f->set_stable(true);
2140 }
2141
2142 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2143 // If there's an error deallocate metadata for field annotations
2144 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2145 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2146 }
2147
2148 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2149 if (has_annotation(_method_CallerSensitive))
2150 m->set_caller_sensitive(true);
2151 if (has_annotation(_method_ForceInline))
2152 m->set_force_inline(true);
2153 if (has_annotation(_method_DontInline))
2154 m->set_dont_inline(true);
2155 if (has_annotation(_method_InjectedProfile))
2156 m->set_has_injected_profile(true);
2157 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2158 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2159 if (has_annotation(_method_Hidden))
2160 m->set_hidden(true);
2161 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2162 m->set_intrinsic_candidate(true);
2163 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2164 m->set_has_reserved_stack_access(true);
2165 }
2166
2167 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2168 assert(ik != NULL, "invariant");
2169 ik->set_is_contended(is_contended());
2170 }
2171
2172 #define MAX_ARGS_SIZE 255
2173 #define MAX_CODE_SIZE 65535
2174 #define INITIAL_MAX_LVT_NUMBER 256
2175
2176 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2177 *
2178 * Rules for LVT's and LVTT's are:
2179 * - There can be any number of LVT's and LVTT's.
2180 * - If there are n LVT's, it is the same as if there was just
2181 * one LVT containing all the entries from the n LVT's.
2182 * - There may be no more than one LVT entry per local variable.
2183 * Two LVT entries are 'equal' if these fields are the same:
2184 * start_pc, length, name, slot
2185 * - There may be no more than one LVTT entry per each LVT entry.
2186 * Each LVTT entry has to match some LVT entry.
2187 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2188 */
2189 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2190 int lvt_cnt,
2191 u2* const localvariable_table_length,
2192 const unsafe_u2** const localvariable_table_start,
2193 int lvtt_cnt,
2194 u2* const localvariable_type_table_length,
2195 const unsafe_u2** const localvariable_type_table_start,
2196 TRAPS) {
2197
2198 ResourceMark rm(THREAD);
2199
2200 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2201 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2202
2203 LVT_HashTable* const table = new LVT_HashTable();
2204
2205 // To fill LocalVariableTable in
2206 const Classfile_LVT_Element* cf_lvt;
2207 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2208
2209 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2210 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2211 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2212 copy_lvt_element(&cf_lvt[idx], lvt);
2213 // If no duplicates, add LVT elem in hashtable.
2214 if (table->put(*lvt, lvt) == false
2215 && _need_verify
2216 && _major_version >= JAVA_1_5_VERSION) {
2217 classfile_parse_error("Duplicated LocalVariableTable attribute "
2218 "entry for '%s' in class file %s",
2219 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2220 CHECK);
2221 }
2222 }
2223 }
2224
2225 // To merge LocalVariableTable and LocalVariableTypeTable
2226 const Classfile_LVT_Element* cf_lvtt;
2227 LocalVariableTableElement lvtt_elem;
2228
2229 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2230 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2231 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2232 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2233 LocalVariableTableElement** entry = table->get(lvtt_elem);
2234 if (entry == NULL) {
2235 if (_need_verify) {
2236 classfile_parse_error("LVTT entry for '%s' in class file %s "
2237 "does not match any LVT entry",
2238 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2239 CHECK);
2240 }
2241 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2242 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2243 "entry for '%s' in class file %s",
2244 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2245 CHECK);
2246 } else {
2247 // to add generic signatures into LocalVariableTable
2248 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2249 }
2250 }
2251 }
2252 }
2253
2254
2255 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2256 const u1* runtime_visible_annotations,
2257 int runtime_visible_annotations_length,
2258 const u1* runtime_invisible_annotations,
2259 int runtime_invisible_annotations_length,
2260 const u1* runtime_visible_parameter_annotations,
2261 int runtime_visible_parameter_annotations_length,
2262 const u1* runtime_invisible_parameter_annotations,
2263 int runtime_invisible_parameter_annotations_length,
2264 const u1* runtime_visible_type_annotations,
2265 int runtime_visible_type_annotations_length,
2266 const u1* runtime_invisible_type_annotations,
2267 int runtime_invisible_type_annotations_length,
2268 const u1* annotation_default,
2269 int annotation_default_length,
2270 TRAPS) {
2271
2272 AnnotationArray* a;
2273
2274 if (runtime_visible_annotations_length +
2275 runtime_invisible_annotations_length > 0) {
2276 a = assemble_annotations(runtime_visible_annotations,
2277 runtime_visible_annotations_length,
2278 runtime_invisible_annotations,
2279 runtime_invisible_annotations_length,
2280 CHECK);
2281 cm->set_method_annotations(a);
2282 }
2283
2284 if (runtime_visible_parameter_annotations_length +
2285 runtime_invisible_parameter_annotations_length > 0) {
2286 a = assemble_annotations(runtime_visible_parameter_annotations,
2287 runtime_visible_parameter_annotations_length,
2288 runtime_invisible_parameter_annotations,
2289 runtime_invisible_parameter_annotations_length,
2290 CHECK);
2291 cm->set_parameter_annotations(a);
2292 }
2293
2294 if (annotation_default_length > 0) {
2295 a = assemble_annotations(annotation_default,
2296 annotation_default_length,
2297 NULL,
2298 0,
2299 CHECK);
2300 cm->set_default_annotations(a);
2301 }
2302
2303 if (runtime_visible_type_annotations_length +
2304 runtime_invisible_type_annotations_length > 0) {
2305 a = assemble_annotations(runtime_visible_type_annotations,
2306 runtime_visible_type_annotations_length,
2307 runtime_invisible_type_annotations,
2308 runtime_invisible_type_annotations_length,
2309 CHECK);
2310 cm->set_type_annotations(a);
2311 }
2312 }
2313
2314
2315 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2316 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2317 // Method* to save footprint, so we only know the size of the resulting Method* when the
2318 // entire method attribute is parsed.
2319 //
2320 // The promoted_flags parameter is used to pass relevant access_flags
2321 // from the method back up to the containing klass. These flag values
2322 // are added to klass's access_flags.
2323
2324 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2325 bool is_interface,
2326 const ConstantPool* cp,
2327 AccessFlags* const promoted_flags,
2328 TRAPS) {
2329 assert(cfs != NULL, "invariant");
2330 assert(cp != NULL, "invariant");
2331 assert(promoted_flags != NULL, "invariant");
2332
2333 ResourceMark rm(THREAD);
2334 // Parse fixed parts:
2335 // access_flags, name_index, descriptor_index, attributes_count
2336 cfs->guarantee_more(8, CHECK_NULL);
2337
2338 int flags = cfs->get_u2_fast();
2339 const u2 name_index = cfs->get_u2_fast();
2340 const int cp_size = cp->length();
2341 check_property(
2342 valid_symbol_at(name_index),
2343 "Illegal constant pool index %u for method name in class file %s",
2344 name_index, CHECK_NULL);
2345 const Symbol* const name = cp->symbol_at(name_index);
2346 verify_legal_method_name(name, CHECK_NULL);
2347
2348 const u2 signature_index = cfs->get_u2_fast();
2349 guarantee_property(
2350 valid_symbol_at(signature_index),
2351 "Illegal constant pool index %u for method signature in class file %s",
2352 signature_index, CHECK_NULL);
2353 const Symbol* const signature = cp->symbol_at(signature_index);
2354
2355 if (name == vmSymbols::class_initializer_name()) {
2356 // We ignore the other access flags for a valid class initializer.
2357 // (JVM Spec 2nd ed., chapter 4.6)
2358 if (_major_version < 51) { // backward compatibility
2359 flags = JVM_ACC_STATIC;
2360 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2361 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2362 } else {
2363 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2364 }
2365 } else {
2366 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2367 }
2368
2369 if (name == vmSymbols::object_initializer_name() && is_interface) {
2370 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2371 }
2372
2373 int args_size = -1; // only used when _need_verify is true
2374 if (_need_verify) {
2375 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2376 verify_legal_method_signature(name, signature, CHECK_NULL);
2377 if (args_size > MAX_ARGS_SIZE) {
2378 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2379 }
2380 }
2381
2382 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2383
2384 // Default values for code and exceptions attribute elements
2385 u2 max_stack = 0;
2386 u2 max_locals = 0;
2387 u4 code_length = 0;
2388 const u1* code_start = 0;
2389 u2 exception_table_length = 0;
2390 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2391 Array<int>* exception_handlers = Universe::the_empty_int_array();
2392 u2 checked_exceptions_length = 0;
2393 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2394 CompressedLineNumberWriteStream* linenumber_table = NULL;
2395 int linenumber_table_length = 0;
2396 int total_lvt_length = 0;
2397 u2 lvt_cnt = 0;
2398 u2 lvtt_cnt = 0;
2399 bool lvt_allocated = false;
2400 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2401 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2402 u2* localvariable_table_length = NULL;
2403 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2404 u2* localvariable_type_table_length = NULL;
2405 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2406 int method_parameters_length = -1;
2407 const u1* method_parameters_data = NULL;
2408 bool method_parameters_seen = false;
2409 bool parsed_code_attribute = false;
2410 bool parsed_checked_exceptions_attribute = false;
2411 bool parsed_stackmap_attribute = false;
2412 // stackmap attribute - JDK1.5
2413 const u1* stackmap_data = NULL;
2414 int stackmap_data_length = 0;
2415 u2 generic_signature_index = 0;
2416 MethodAnnotationCollector parsed_annotations;
2417 const u1* runtime_visible_annotations = NULL;
2418 int runtime_visible_annotations_length = 0;
2419 const u1* runtime_invisible_annotations = NULL;
2420 int runtime_invisible_annotations_length = 0;
2421 const u1* runtime_visible_parameter_annotations = NULL;
2422 int runtime_visible_parameter_annotations_length = 0;
2423 const u1* runtime_invisible_parameter_annotations = NULL;
2424 int runtime_invisible_parameter_annotations_length = 0;
2425 const u1* runtime_visible_type_annotations = NULL;
2426 int runtime_visible_type_annotations_length = 0;
2427 const u1* runtime_invisible_type_annotations = NULL;
2428 int runtime_invisible_type_annotations_length = 0;
2429 bool runtime_invisible_annotations_exists = false;
2430 bool runtime_invisible_type_annotations_exists = false;
2431 bool runtime_invisible_parameter_annotations_exists = false;
2432 const u1* annotation_default = NULL;
2433 int annotation_default_length = 0;
2434
2435 // Parse code and exceptions attribute
2436 u2 method_attributes_count = cfs->get_u2_fast();
2437 while (method_attributes_count--) {
2438 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2439 const u2 method_attribute_name_index = cfs->get_u2_fast();
2440 const u4 method_attribute_length = cfs->get_u4_fast();
2441 check_property(
2442 valid_symbol_at(method_attribute_name_index),
2443 "Invalid method attribute name index %u in class file %s",
2444 method_attribute_name_index, CHECK_NULL);
2445
2446 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2447 if (method_attribute_name == vmSymbols::tag_code()) {
2448 // Parse Code attribute
2449 if (_need_verify) {
2450 guarantee_property(
2451 !access_flags.is_native() && !access_flags.is_abstract(),
2452 "Code attribute in native or abstract methods in class file %s",
2453 CHECK_NULL);
2454 }
2455 if (parsed_code_attribute) {
2456 classfile_parse_error("Multiple Code attributes in class file %s",
2457 CHECK_NULL);
2458 }
2459 parsed_code_attribute = true;
2460
2461 // Stack size, locals size, and code size
2462 cfs->guarantee_more(8, CHECK_NULL);
2463 max_stack = cfs->get_u2_fast();
2464 max_locals = cfs->get_u2_fast();
2465 code_length = cfs->get_u4_fast();
2466 if (_need_verify) {
2467 guarantee_property(args_size <= max_locals,
2468 "Arguments can't fit into locals in class file %s",
2469 CHECK_NULL);
2470 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2471 "Invalid method Code length %u in class file %s",
2472 code_length, CHECK_NULL);
2473 }
2474 // Code pointer
2475 code_start = cfs->current();
2476 assert(code_start != NULL, "null code start");
2477 cfs->guarantee_more(code_length, CHECK_NULL);
2478 cfs->skip_u1_fast(code_length);
2479
2480 // Exception handler table
2481 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2482 exception_table_length = cfs->get_u2_fast();
2483 if (exception_table_length > 0) {
2484 exception_table_start = parse_exception_table(cfs,
2485 code_length,
2486 exception_table_length,
2487 CHECK_NULL);
2488 }
2489
2490 // Parse additional attributes in code attribute
2491 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2492 u2 code_attributes_count = cfs->get_u2_fast();
2493
2494 unsigned int calculated_attribute_length = 0;
2495
2496 calculated_attribute_length =
2497 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2498 calculated_attribute_length +=
2499 code_length +
2500 sizeof(exception_table_length) +
2501 sizeof(code_attributes_count) +
2502 exception_table_length *
2503 ( sizeof(u2) + // start_pc
2504 sizeof(u2) + // end_pc
2505 sizeof(u2) + // handler_pc
2506 sizeof(u2) ); // catch_type_index
2507
2508 while (code_attributes_count--) {
2509 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2510 const u2 code_attribute_name_index = cfs->get_u2_fast();
2511 const u4 code_attribute_length = cfs->get_u4_fast();
2512 calculated_attribute_length += code_attribute_length +
2513 sizeof(code_attribute_name_index) +
2514 sizeof(code_attribute_length);
2515 check_property(valid_symbol_at(code_attribute_name_index),
2516 "Invalid code attribute name index %u in class file %s",
2517 code_attribute_name_index,
2518 CHECK_NULL);
2519 if (LoadLineNumberTables &&
2520 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2521 // Parse and compress line number table
2522 parse_linenumber_table(code_attribute_length,
2523 code_length,
2524 &linenumber_table,
2525 CHECK_NULL);
2526
2527 } else if (LoadLocalVariableTables &&
2528 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2529 // Parse local variable table
2530 if (!lvt_allocated) {
2531 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2532 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2533 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2534 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2535 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2536 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2537 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2538 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2539 lvt_allocated = true;
2540 }
2541 if (lvt_cnt == max_lvt_cnt) {
2542 max_lvt_cnt <<= 1;
2543 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2544 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2545 }
2546 localvariable_table_start[lvt_cnt] =
2547 parse_localvariable_table(cfs,
2548 code_length,
2549 max_locals,
2550 code_attribute_length,
2551 &localvariable_table_length[lvt_cnt],
2552 false, // is not LVTT
2553 CHECK_NULL);
2554 total_lvt_length += localvariable_table_length[lvt_cnt];
2555 lvt_cnt++;
2556 } else if (LoadLocalVariableTypeTables &&
2557 _major_version >= JAVA_1_5_VERSION &&
2558 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2559 if (!lvt_allocated) {
2560 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2561 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2562 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2563 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2564 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2565 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2566 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2567 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2568 lvt_allocated = true;
2569 }
2570 // Parse local variable type table
2571 if (lvtt_cnt == max_lvtt_cnt) {
2572 max_lvtt_cnt <<= 1;
2573 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2574 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2575 }
2576 localvariable_type_table_start[lvtt_cnt] =
2577 parse_localvariable_table(cfs,
2578 code_length,
2579 max_locals,
2580 code_attribute_length,
2581 &localvariable_type_table_length[lvtt_cnt],
2582 true, // is LVTT
2583 CHECK_NULL);
2584 lvtt_cnt++;
2585 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2586 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2587 // Stack map is only needed by the new verifier in JDK1.5.
2588 if (parsed_stackmap_attribute) {
2589 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2590 }
2591 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2592 stackmap_data_length = code_attribute_length;
2593 parsed_stackmap_attribute = true;
2594 } else {
2595 // Skip unknown attributes
2596 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2597 }
2598 }
2599 // check method attribute length
2600 if (_need_verify) {
2601 guarantee_property(method_attribute_length == calculated_attribute_length,
2602 "Code segment has wrong length in class file %s",
2603 CHECK_NULL);
2604 }
2605 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2606 // Parse Exceptions attribute
2607 if (parsed_checked_exceptions_attribute) {
2608 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2609 CHECK_NULL);
2610 }
2611 parsed_checked_exceptions_attribute = true;
2612 checked_exceptions_start =
2613 parse_checked_exceptions(cfs,
2614 &checked_exceptions_length,
2615 method_attribute_length,
2616 CHECK_NULL);
2617 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2618 // reject multiple method parameters
2619 if (method_parameters_seen) {
2620 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2621 CHECK_NULL);
2622 }
2623 method_parameters_seen = true;
2624 method_parameters_length = cfs->get_u1_fast();
2625 const u2 real_length = (method_parameters_length * 4u) + 1u;
2626 if (method_attribute_length != real_length) {
2627 classfile_parse_error(
2628 "Invalid MethodParameters method attribute length %u in class file",
2629 method_attribute_length, CHECK_NULL);
2630 }
2631 method_parameters_data = cfs->current();
2632 cfs->skip_u2_fast(method_parameters_length);
2633 cfs->skip_u2_fast(method_parameters_length);
2634 // ignore this attribute if it cannot be reflected
2635 if (!SystemDictionary::Parameter_klass_loaded())
2636 method_parameters_length = -1;
2637 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2638 if (method_attribute_length != 0) {
2639 classfile_parse_error(
2640 "Invalid Synthetic method attribute length %u in class file %s",
2641 method_attribute_length, CHECK_NULL);
2642 }
2643 // Should we check that there hasn't already been a synthetic attribute?
2644 access_flags.set_is_synthetic();
2645 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2646 if (method_attribute_length != 0) {
2647 classfile_parse_error(
2648 "Invalid Deprecated method attribute length %u in class file %s",
2649 method_attribute_length, CHECK_NULL);
2650 }
2651 } else if (_major_version >= JAVA_1_5_VERSION) {
2652 if (method_attribute_name == vmSymbols::tag_signature()) {
2653 if (generic_signature_index != 0) {
2654 classfile_parse_error(
2655 "Multiple Signature attributes for method in class file %s",
2656 CHECK_NULL);
2657 }
2658 if (method_attribute_length != 2) {
2659 classfile_parse_error(
2660 "Invalid Signature attribute length %u in class file %s",
2661 method_attribute_length, CHECK_NULL);
2662 }
2663 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2664 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2665 if (runtime_visible_annotations != NULL) {
2666 classfile_parse_error(
2667 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2668 CHECK_NULL);
2669 }
2670 runtime_visible_annotations_length = method_attribute_length;
2671 runtime_visible_annotations = cfs->current();
2672 assert(runtime_visible_annotations != NULL, "null visible annotations");
2673 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2674 parse_annotations(cp,
2675 runtime_visible_annotations,
2676 runtime_visible_annotations_length,
2677 &parsed_annotations,
2678 _loader_data,
2679 _can_access_vm_annotations,
2680 CHECK_NULL);
2681 cfs->skip_u1_fast(runtime_visible_annotations_length);
2682 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2683 if (runtime_invisible_annotations_exists) {
2684 classfile_parse_error(
2685 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2686 CHECK_NULL);
2687 }
2688 runtime_invisible_annotations_exists = true;
2689 if (PreserveAllAnnotations) {
2690 runtime_invisible_annotations_length = method_attribute_length;
2691 runtime_invisible_annotations = cfs->current();
2692 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2693 }
2694 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2695 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2696 if (runtime_visible_parameter_annotations != NULL) {
2697 classfile_parse_error(
2698 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2699 CHECK_NULL);
2700 }
2701 runtime_visible_parameter_annotations_length = method_attribute_length;
2702 runtime_visible_parameter_annotations = cfs->current();
2703 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2704 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2705 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2706 if (runtime_invisible_parameter_annotations_exists) {
2707 classfile_parse_error(
2708 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2709 CHECK_NULL);
2710 }
2711 runtime_invisible_parameter_annotations_exists = true;
2712 if (PreserveAllAnnotations) {
2713 runtime_invisible_parameter_annotations_length = method_attribute_length;
2714 runtime_invisible_parameter_annotations = cfs->current();
2715 assert(runtime_invisible_parameter_annotations != NULL,
2716 "null invisible parameter annotations");
2717 }
2718 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2719 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2720 if (annotation_default != NULL) {
2721 classfile_parse_error(
2722 "Multiple AnnotationDefault attributes for method in class file %s",
2723 CHECK_NULL);
2724 }
2725 annotation_default_length = method_attribute_length;
2726 annotation_default = cfs->current();
2727 assert(annotation_default != NULL, "null annotation default");
2728 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2729 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2730 if (runtime_visible_type_annotations != NULL) {
2731 classfile_parse_error(
2732 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2733 CHECK_NULL);
2734 }
2735 runtime_visible_type_annotations_length = method_attribute_length;
2736 runtime_visible_type_annotations = cfs->current();
2737 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2738 // No need for the VM to parse Type annotations
2739 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2740 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2741 if (runtime_invisible_type_annotations_exists) {
2742 classfile_parse_error(
2743 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2744 CHECK_NULL);
2745 } else {
2746 runtime_invisible_type_annotations_exists = true;
2747 }
2748 if (PreserveAllAnnotations) {
2749 runtime_invisible_type_annotations_length = method_attribute_length;
2750 runtime_invisible_type_annotations = cfs->current();
2751 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2752 }
2753 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2754 } else {
2755 // Skip unknown attributes
2756 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2757 }
2758 } else {
2759 // Skip unknown attributes
2760 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2761 }
2762 }
2763
2764 if (linenumber_table != NULL) {
2765 linenumber_table->write_terminator();
2766 linenumber_table_length = linenumber_table->position();
2767 }
2768
2769 // Make sure there's at least one Code attribute in non-native/non-abstract method
2770 if (_need_verify) {
2771 guarantee_property(access_flags.is_native() ||
2772 access_flags.is_abstract() ||
2773 parsed_code_attribute,
2774 "Absent Code attribute in method that is not native or abstract in class file %s",
2775 CHECK_NULL);
2776 }
2777
2778 // All sizing information for a Method* is finally available, now create it
2779 InlineTableSizes sizes(
2780 total_lvt_length,
2781 linenumber_table_length,
2782 exception_table_length,
2783 checked_exceptions_length,
2784 method_parameters_length,
2785 generic_signature_index,
2786 runtime_visible_annotations_length +
2787 runtime_invisible_annotations_length,
2788 runtime_visible_parameter_annotations_length +
2789 runtime_invisible_parameter_annotations_length,
2790 runtime_visible_type_annotations_length +
2791 runtime_invisible_type_annotations_length,
2792 annotation_default_length,
2793 0);
2794
2795 Method* const m = Method::allocate(_loader_data,
2796 code_length,
2797 access_flags,
2798 &sizes,
2799 ConstMethod::NORMAL,
2800 CHECK_NULL);
2801
2802 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2803
2804 // Fill in information from fixed part (access_flags already set)
2805 m->set_constants(_cp);
2806 m->set_name_index(name_index);
2807 m->set_signature_index(signature_index);
2808 m->compute_from_signature(cp->symbol_at(signature_index));
2809 assert(args_size < 0 || args_size == m->size_of_parameters(), "");
2810
2811 // Fill in code attribute information
2812 m->set_max_stack(max_stack);
2813 m->set_max_locals(max_locals);
2814 if (stackmap_data != NULL) {
2815 m->constMethod()->copy_stackmap_data(_loader_data,
2816 (u1*)stackmap_data,
2817 stackmap_data_length,
2818 CHECK_NULL);
2819 }
2820
2821 // Copy byte codes
2822 m->set_code((u1*)code_start);
2823
2824 // Copy line number table
2825 if (linenumber_table != NULL) {
2826 memcpy(m->compressed_linenumber_table(),
2827 linenumber_table->buffer(),
2828 linenumber_table_length);
2829 }
2830
2831 // Copy exception table
2832 if (exception_table_length > 0) {
2833 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2834 m->exception_table_start(),
2835 exception_table_length * sizeof(ExceptionTableElement),
2836 sizeof(u2));
2837 }
2838
2839 // Copy method parameters
2840 if (method_parameters_length > 0) {
2841 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2842 for (int i = 0; i < method_parameters_length; i++) {
2843 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2844 method_parameters_data += 2;
2845 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2846 method_parameters_data += 2;
2847 }
2848 }
2849
2850 // Copy checked exceptions
2851 if (checked_exceptions_length > 0) {
2852 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2853 m->checked_exceptions_start(),
2854 checked_exceptions_length * sizeof(CheckedExceptionElement),
2855 sizeof(u2));
2856 }
2857
2858 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2859 if (total_lvt_length > 0) {
2860 promoted_flags->set_has_localvariable_table();
2861 copy_localvariable_table(m->constMethod(),
2862 lvt_cnt,
2863 localvariable_table_length,
2864 localvariable_table_start,
2865 lvtt_cnt,
2866 localvariable_type_table_length,
2867 localvariable_type_table_start,
2868 CHECK_NULL);
2869 }
2870
2871 if (parsed_annotations.has_any_annotations())
2872 parsed_annotations.apply_to(methodHandle(THREAD, m));
2873
2874 if (is_hidden()) { // Mark methods in hidden classes as 'hidden'.
2875 m->set_hidden(true);
2876 }
2877
2878 // Copy annotations
2879 copy_method_annotations(m->constMethod(),
2880 runtime_visible_annotations,
2881 runtime_visible_annotations_length,
2882 runtime_invisible_annotations,
2883 runtime_invisible_annotations_length,
2884 runtime_visible_parameter_annotations,
2885 runtime_visible_parameter_annotations_length,
2886 runtime_invisible_parameter_annotations,
2887 runtime_invisible_parameter_annotations_length,
2888 runtime_visible_type_annotations,
2889 runtime_visible_type_annotations_length,
2890 runtime_invisible_type_annotations,
2891 runtime_invisible_type_annotations_length,
2892 annotation_default,
2893 annotation_default_length,
2894 CHECK_NULL);
2895
2896 if (name == vmSymbols::finalize_method_name() &&
2897 signature == vmSymbols::void_method_signature()) {
2898 if (m->is_empty_method()) {
2899 _has_empty_finalizer = true;
2900 } else {
2901 _has_finalizer = true;
2902 }
2903 }
2904 if (name == vmSymbols::object_initializer_name() &&
2905 signature == vmSymbols::void_method_signature() &&
2906 m->is_vanilla_constructor()) {
2907 _has_vanilla_constructor = true;
2908 }
2909
2910 NOT_PRODUCT(m->verify());
2911 return m;
2912 }
2913
2914
2915 // The promoted_flags parameter is used to pass relevant access_flags
2916 // from the methods back up to the containing klass. These flag values
2917 // are added to klass's access_flags.
2918 // Side-effects: populates the _methods field in the parser
2919 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2920 bool is_interface,
2921 AccessFlags* promoted_flags,
2922 bool* has_final_method,
2923 bool* declares_nonstatic_concrete_methods,
2924 TRAPS) {
2925 assert(cfs != NULL, "invariant");
2926 assert(promoted_flags != NULL, "invariant");
2927 assert(has_final_method != NULL, "invariant");
2928 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2929
2930 assert(NULL == _methods, "invariant");
2931
2932 cfs->guarantee_more(2, CHECK); // length
2933 const u2 length = cfs->get_u2_fast();
2934 if (length == 0) {
2935 _methods = Universe::the_empty_method_array();
2936 } else {
2937 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2938 length,
2939 NULL,
2940 CHECK);
2941
2942 for (int index = 0; index < length; index++) {
2943 Method* method = parse_method(cfs,
2944 is_interface,
2945 _cp,
2946 promoted_flags,
2947 CHECK);
2948
2949 if (method->is_final()) {
2950 *has_final_method = true;
2951 }
2952 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2953 // used for interface initialization, and default method inheritance analysis
2954 if (is_interface && !(*declares_nonstatic_concrete_methods)
2955 && !method->is_abstract() && !method->is_static()) {
2956 *declares_nonstatic_concrete_methods = true;
2957 }
2958 _methods->at_put(index, method);
2959 }
2960
2961 if (_need_verify && length > 1) {
2962 // Check duplicated methods
2963 ResourceMark rm(THREAD);
2964 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2965 THREAD, NameSigHash*, HASH_ROW_SIZE);
2966 initialize_hashtable(names_and_sigs);
2967 bool dup = false;
2968 const Symbol* name = NULL;
2969 const Symbol* sig = NULL;
2970 {
2971 debug_only(NoSafepointVerifier nsv;)
2972 for (int i = 0; i < length; i++) {
2973 const Method* const m = _methods->at(i);
2974 name = m->name();
2975 sig = m->signature();
2976 // If no duplicates, add name/signature in hashtable names_and_sigs.
2977 if (!put_after_lookup(name, sig, names_and_sigs)) {
2978 dup = true;
2979 break;
2980 }
2981 }
2982 }
2983 if (dup) {
2984 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2985 name->as_C_string(), sig->as_klass_external_name(), CHECK);
2986 }
2987 }
2988 }
2989 }
2990
2991 static const intArray* sort_methods(Array<Method*>* methods) {
2992 const int length = methods->length();
2993 // If JVMTI original method ordering or sharing is enabled we have to
2994 // remember the original class file ordering.
2995 // We temporarily use the vtable_index field in the Method* to store the
2996 // class file index, so we can read in after calling qsort.
2997 // Put the method ordering in the shared archive.
2998 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
2999 for (int index = 0; index < length; index++) {
3000 Method* const m = methods->at(index);
3001 assert(!m->valid_vtable_index(), "vtable index should not be set");
3002 m->set_vtable_index(index);
3003 }
3004 }
3005 // Sort method array by ascending method name (for faster lookups & vtable construction)
3006 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3007 Method::sort_methods(methods);
3008
3009 intArray* method_ordering = NULL;
3010 // If JVMTI original method ordering or sharing is enabled construct int
3011 // array remembering the original ordering
3012 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3013 method_ordering = new intArray(length, length, -1);
3014 for (int index = 0; index < length; index++) {
3015 Method* const m = methods->at(index);
3016 const int old_index = m->vtable_index();
3017 assert(old_index >= 0 && old_index < length, "invalid method index");
3018 method_ordering->at_put(index, old_index);
3019 m->set_vtable_index(Method::invalid_vtable_index);
3020 }
3021 }
3022 return method_ordering;
3023 }
3024
3025 // Parse generic_signature attribute for methods and fields
3026 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3027 TRAPS) {
3028 assert(cfs != NULL, "invariant");
3029
3030 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3031 const u2 generic_signature_index = cfs->get_u2_fast();
3032 check_property(
3033 valid_symbol_at(generic_signature_index),
3034 "Invalid Signature attribute at constant pool index %u in class file %s",
3035 generic_signature_index, CHECK_0);
3036 return generic_signature_index;
3037 }
3038
3039 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3040 TRAPS) {
3041
3042 assert(cfs != NULL, "invariant");
3043
3044 cfs->guarantee_more(2, CHECK); // sourcefile_index
3045 const u2 sourcefile_index = cfs->get_u2_fast();
3046 check_property(
3047 valid_symbol_at(sourcefile_index),
3048 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3049 sourcefile_index, CHECK);
3050 set_class_sourcefile_index(sourcefile_index);
3051 }
3052
3053 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3054 int length,
3055 TRAPS) {
3056 assert(cfs != NULL, "invariant");
3057
3058 const u1* const sde_buffer = cfs->current();
3059 assert(sde_buffer != NULL, "null sde buffer");
3060
3061 // Don't bother storing it if there is no way to retrieve it
3062 if (JvmtiExport::can_get_source_debug_extension()) {
3063 assert((length+1) > length, "Overflow checking");
3064 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3065 for (int i = 0; i < length; i++) {
3066 sde[i] = sde_buffer[i];
3067 }
3068 sde[length] = '\0';
3069 set_class_sde_buffer((const char*)sde, length);
3070 }
3071 // Got utf8 string, set stream position forward
3072 cfs->skip_u1(length, CHECK);
3073 }
3074
3075
3076 // Inner classes can be static, private or protected (classic VM does this)
3077 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3078 JVM_ACC_PRIVATE | \
3079 JVM_ACC_PROTECTED | \
3080 JVM_ACC_STATIC \
3081 )
3082
3083 // Return number of classes in the inner classes attribute table
3084 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3085 const u1* const inner_classes_attribute_start,
3086 bool parsed_enclosingmethod_attribute,
3087 u2 enclosing_method_class_index,
3088 u2 enclosing_method_method_index,
3089 TRAPS) {
3090 const u1* const current_mark = cfs->current();
3091 u2 length = 0;
3092 if (inner_classes_attribute_start != NULL) {
3093 cfs->set_current(inner_classes_attribute_start);
3094 cfs->guarantee_more(2, CHECK_0); // length
3095 length = cfs->get_u2_fast();
3096 }
3097
3098 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3099 // method data:
3100 // [inner_class_info_index,
3101 // outer_class_info_index,
3102 // inner_name_index,
3103 // inner_class_access_flags,
3104 // ...
3105 // enclosing_method_class_index,
3106 // enclosing_method_method_index]
3107 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3108 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3109 _inner_classes = inner_classes;
3110
3111 int index = 0;
3112 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3113 for (int n = 0; n < length; n++) {
3114 // Inner class index
3115 const u2 inner_class_info_index = cfs->get_u2_fast();
3116 check_property(
3117 valid_klass_reference_at(inner_class_info_index),
3118 "inner_class_info_index %u has bad constant type in class file %s",
3119 inner_class_info_index, CHECK_0);
3120 // Outer class index
3121 const u2 outer_class_info_index = cfs->get_u2_fast();
3122 check_property(
3123 outer_class_info_index == 0 ||
3124 valid_klass_reference_at(outer_class_info_index),
3125 "outer_class_info_index %u has bad constant type in class file %s",
3126 outer_class_info_index, CHECK_0);
3127 // Inner class name
3128 const u2 inner_name_index = cfs->get_u2_fast();
3129 check_property(
3130 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3131 "inner_name_index %u has bad constant type in class file %s",
3132 inner_name_index, CHECK_0);
3133 if (_need_verify) {
3134 guarantee_property(inner_class_info_index != outer_class_info_index,
3135 "Class is both outer and inner class in class file %s", CHECK_0);
3136 }
3137 // Access flags
3138 jint flags;
3139 // JVM_ACC_MODULE is defined in JDK-9 and later.
3140 if (_major_version >= JAVA_9_VERSION) {
3141 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3142 } else {
3143 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3144 }
3145 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3146 // Set abstract bit for old class files for backward compatibility
3147 flags |= JVM_ACC_ABSTRACT;
3148 }
3149 verify_legal_class_modifiers(flags, CHECK_0);
3150 AccessFlags inner_access_flags(flags);
3151
3152 inner_classes->at_put(index++, inner_class_info_index);
3153 inner_classes->at_put(index++, outer_class_info_index);
3154 inner_classes->at_put(index++, inner_name_index);
3155 inner_classes->at_put(index++, inner_access_flags.as_short());
3156 }
3157
3158 // 4347400: make sure there's no duplicate entry in the classes array
3159 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3160 for(int i = 0; i < length * 4; i += 4) {
3161 for(int j = i + 4; j < length * 4; j += 4) {
3162 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3163 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3164 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3165 inner_classes->at(i+3) != inner_classes->at(j+3)),
3166 "Duplicate entry in InnerClasses in class file %s",
3167 CHECK_0);
3168 }
3169 }
3170 }
3171
3172 // Set EnclosingMethod class and method indexes.
3173 if (parsed_enclosingmethod_attribute) {
3174 inner_classes->at_put(index++, enclosing_method_class_index);
3175 inner_classes->at_put(index++, enclosing_method_method_index);
3176 }
3177 assert(index == size, "wrong size");
3178
3179 // Restore buffer's current position.
3180 cfs->set_current(current_mark);
3181
3182 return length;
3183 }
3184
3185 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3186 const u1* const nest_members_attribute_start,
3187 TRAPS) {
3188 const u1* const current_mark = cfs->current();
3189 u2 length = 0;
3190 if (nest_members_attribute_start != NULL) {
3191 cfs->set_current(nest_members_attribute_start);
3192 cfs->guarantee_more(2, CHECK_0); // length
3193 length = cfs->get_u2_fast();
3194 }
3195 const int size = length;
3196 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3197 _nest_members = nest_members;
3198
3199 int index = 0;
3200 cfs->guarantee_more(2 * length, CHECK_0);
3201 for (int n = 0; n < length; n++) {
3202 const u2 class_info_index = cfs->get_u2_fast();
3203 check_property(
3204 valid_klass_reference_at(class_info_index),
3205 "Nest member class_info_index %u has bad constant type in class file %s",
3206 class_info_index, CHECK_0);
3207 nest_members->at_put(index++, class_info_index);
3208 }
3209 assert(index == size, "wrong size");
3210
3211 // Restore buffer's current position.
3212 cfs->set_current(current_mark);
3213
3214 return length;
3215 }
3216
3217 u2 ClassFileParser::parse_classfile_permitted_subclasses_attribute(const ClassFileStream* const cfs,
3218 const u1* const permitted_subclasses_attribute_start,
3219 TRAPS) {
3220 const u1* const current_mark = cfs->current();
3221 u2 length = 0;
3222 if (permitted_subclasses_attribute_start != NULL) {
3223 cfs->set_current(permitted_subclasses_attribute_start);
3224 cfs->guarantee_more(2, CHECK_0); // length
3225 length = cfs->get_u2_fast();
3226 }
3227 if (length < 1) {
3228 classfile_parse_error("PermittedSubclasses attribute is empty in class file %s", CHECK_0);
3229 }
3230 const int size = length;
3231 Array<u2>* const permitted_subclasses = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3232 _permitted_subclasses = permitted_subclasses;
3233
3234 int index = 0;
3235 cfs->guarantee_more(2 * length, CHECK_0);
3236 for (int n = 0; n < length; n++) {
3237 const u2 class_info_index = cfs->get_u2_fast();
3238 check_property(
3239 valid_klass_reference_at(class_info_index),
3240 "Permitted subclass class_info_index %u has bad constant type in class file %s",
3241 class_info_index, CHECK_0);
3242 permitted_subclasses->at_put(index++, class_info_index);
3243 }
3244 assert(index == size, "wrong size");
3245
3246 // Restore buffer's current position.
3247 cfs->set_current(current_mark);
3248
3249 return length;
3250 }
3251
3252 // Record {
3253 // u2 attribute_name_index;
3254 // u4 attribute_length;
3255 // u2 components_count;
3256 // component_info components[components_count];
3257 // }
3258 // component_info {
3259 // u2 name_index;
3260 // u2 descriptor_index
3261 // u2 attributes_count;
3262 // attribute_info_attributes[attributes_count];
3263 // }
3264 u2 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3265 const ConstantPool* cp,
3266 const u1* const record_attribute_start,
3267 TRAPS) {
3268 const u1* const current_mark = cfs->current();
3269 int components_count = 0;
3270 unsigned int calculate_attr_size = 0;
3271 if (record_attribute_start != NULL) {
3272 cfs->set_current(record_attribute_start);
3273 cfs->guarantee_more(2, CHECK_0); // num of components
3274 components_count = (int)cfs->get_u2_fast();
3275 calculate_attr_size = 2;
3276 }
3277
3278 Array<RecordComponent*>* const record_components =
3279 MetadataFactory::new_array<RecordComponent*>(_loader_data, components_count, NULL, CHECK_0);
3280 _record_components = record_components;
3281
3282 for (int x = 0; x < components_count; x++) {
3283 cfs->guarantee_more(6, CHECK_0); // name_index, descriptor_index, attributes_count
3284
3285 const u2 name_index = cfs->get_u2_fast();
3286 check_property(valid_symbol_at(name_index),
3287 "Invalid constant pool index %u for name in Record attribute in class file %s",
3288 name_index, CHECK_0);
3289 const Symbol* const name = cp->symbol_at(name_index);
3290 verify_legal_field_name(name, CHECK_0);
3291
3292 const u2 descriptor_index = cfs->get_u2_fast();
3293 check_property(valid_symbol_at(descriptor_index),
3294 "Invalid constant pool index %u for descriptor in Record attribute in class file %s",
3295 descriptor_index, CHECK_0);
3296 const Symbol* const descr = cp->symbol_at(descriptor_index);
3297 verify_legal_field_signature(name, descr, CHECK_0);
3298
3299 const u2 attributes_count = cfs->get_u2_fast();
3300 calculate_attr_size += 6;
3301 u2 generic_sig_index = 0;
3302 const u1* runtime_visible_annotations = NULL;
3303 int runtime_visible_annotations_length = 0;
3304 const u1* runtime_invisible_annotations = NULL;
3305 int runtime_invisible_annotations_length = 0;
3306 bool runtime_invisible_annotations_exists = false;
3307 const u1* runtime_visible_type_annotations = NULL;
3308 int runtime_visible_type_annotations_length = 0;
3309 const u1* runtime_invisible_type_annotations = NULL;
3310 int runtime_invisible_type_annotations_length = 0;
3311 bool runtime_invisible_type_annotations_exists = false;
3312
3313 // Expected attributes for record components are Signature, Runtime(In)VisibleAnnotations,
3314 // and Runtime(In)VisibleTypeAnnotations. Other attributes are ignored.
3315 for (int y = 0; y < attributes_count; y++) {
3316 cfs->guarantee_more(6, CHECK_0); // attribute_name_index, attribute_length
3317 const u2 attribute_name_index = cfs->get_u2_fast();
3318 const u4 attribute_length = cfs->get_u4_fast();
3319 calculate_attr_size += 6;
3320 check_property(
3321 valid_symbol_at(attribute_name_index),
3322 "Invalid Record attribute name index %u in class file %s",
3323 attribute_name_index, CHECK_0);
3324
3325 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
3326 if (attribute_name == vmSymbols::tag_signature()) {
3327 if (generic_sig_index != 0) {
3328 classfile_parse_error(
3329 "Multiple Signature attributes for Record component in class file %s",
3330 CHECK_0);
3331 }
3332 if (attribute_length != 2) {
3333 classfile_parse_error(
3334 "Invalid Signature attribute length %u in Record component in class file %s",
3335 attribute_length, CHECK_0);
3336 }
3337 generic_sig_index = parse_generic_signature_attribute(cfs, CHECK_0);
3338
3339 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
3340 if (runtime_visible_annotations != NULL) {
3341 classfile_parse_error(
3342 "Multiple RuntimeVisibleAnnotations attributes for Record component in class file %s", CHECK_0);
3343 }
3344 runtime_visible_annotations_length = attribute_length;
3345 runtime_visible_annotations = cfs->current();
3346
3347 assert(runtime_visible_annotations != NULL, "null record component visible annotation");
3348 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_0);
3349 cfs->skip_u1_fast(runtime_visible_annotations_length);
3350
3351 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
3352 if (runtime_invisible_annotations_exists) {
3353 classfile_parse_error(
3354 "Multiple RuntimeInvisibleAnnotations attributes for Record component in class file %s", CHECK_0);
3355 }
3356 runtime_invisible_annotations_exists = true;
3357 if (PreserveAllAnnotations) {
3358 runtime_invisible_annotations_length = attribute_length;
3359 runtime_invisible_annotations = cfs->current();
3360 assert(runtime_invisible_annotations != NULL, "null record component invisible annotation");
3361 }
3362 cfs->skip_u1(attribute_length, CHECK_0);
3363
3364 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
3365 if (runtime_visible_type_annotations != NULL) {
3366 classfile_parse_error(
3367 "Multiple RuntimeVisibleTypeAnnotations attributes for Record component in class file %s", CHECK_0);
3368 }
3369 runtime_visible_type_annotations_length = attribute_length;
3370 runtime_visible_type_annotations = cfs->current();
3371
3372 assert(runtime_visible_type_annotations != NULL, "null record component visible type annotation");
3373 cfs->guarantee_more(runtime_visible_type_annotations_length, CHECK_0);
3374 cfs->skip_u1_fast(runtime_visible_type_annotations_length);
3375
3376 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
3377 if (runtime_invisible_type_annotations_exists) {
3378 classfile_parse_error(
3379 "Multiple RuntimeInvisibleTypeAnnotations attributes for Record component in class file %s", CHECK_0);
3380 }
3381 runtime_invisible_type_annotations_exists = true;
3382 if (PreserveAllAnnotations) {
3383 runtime_invisible_type_annotations_length = attribute_length;
3384 runtime_invisible_type_annotations = cfs->current();
3385 assert(runtime_invisible_type_annotations != NULL, "null record component invisible type annotation");
3386 }
3387 cfs->skip_u1(attribute_length, CHECK_0);
3388
3389 } else {
3390 // Skip unknown attributes
3391 cfs->skip_u1(attribute_length, CHECK_0);
3392 }
3393 calculate_attr_size += attribute_length;
3394 } // End of attributes For loop
3395
3396 AnnotationArray* annotations = assemble_annotations(runtime_visible_annotations,
3397 runtime_visible_annotations_length,
3398 runtime_invisible_annotations,
3399 runtime_invisible_annotations_length,
3400 CHECK_0);
3401 AnnotationArray* type_annotations = assemble_annotations(runtime_visible_type_annotations,
3402 runtime_visible_type_annotations_length,
3403 runtime_invisible_type_annotations,
3404 runtime_invisible_type_annotations_length,
3405 CHECK_0);
3406
3407 RecordComponent* record_component =
3408 RecordComponent::allocate(_loader_data, name_index, descriptor_index,
3409 attributes_count, generic_sig_index,
3410 annotations, type_annotations, CHECK_0);
3411 record_components->at_put(x, record_component);
3412 } // End of component processing loop
3413
3414 // Restore buffer's current position.
3415 cfs->set_current(current_mark);
3416 return calculate_attr_size;
3417 }
3418
3419 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3420 set_class_synthetic_flag(true);
3421 }
3422
3423 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3424 assert(cfs != NULL, "invariant");
3425
3426 const u2 signature_index = cfs->get_u2(CHECK);
3427 check_property(
3428 valid_symbol_at(signature_index),
3429 "Invalid constant pool index %u in Signature attribute in class file %s",
3430 signature_index, CHECK);
3431 set_class_generic_signature_index(signature_index);
3432 }
3433
3434 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3435 ConstantPool* cp,
3436 u4 attribute_byte_length,
3437 TRAPS) {
3438 assert(cfs != NULL, "invariant");
3439 assert(cp != NULL, "invariant");
3440
3441 const u1* const current_start = cfs->current();
3442
3443 guarantee_property(attribute_byte_length >= sizeof(u2),
3444 "Invalid BootstrapMethods attribute length %u in class file %s",
3445 attribute_byte_length,
3446 CHECK);
3447
3448 cfs->guarantee_more(attribute_byte_length, CHECK);
3449
3450 const int attribute_array_length = cfs->get_u2_fast();
3451
3452 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3453 "Short length on BootstrapMethods in class file %s",
3454 CHECK);
3455
3456
3457 // The attribute contains a counted array of counted tuples of shorts,
3458 // represending bootstrap specifiers:
3459 // length*{bootstrap_method_index, argument_count*{argument_index}}
3460 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3461 // operand_count = number of shorts in attr, except for leading length
3462
3463 // The attribute is copied into a short[] array.
3464 // The array begins with a series of short[2] pairs, one for each tuple.
3465 const int index_size = (attribute_array_length * 2);
3466
3467 Array<u2>* const operands =
3468 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3469
3470 // Eagerly assign operands so they will be deallocated with the constant
3471 // pool if there is an error.
3472 cp->set_operands(operands);
3473
3474 int operand_fill_index = index_size;
3475 const int cp_size = cp->length();
3476
3477 for (int n = 0; n < attribute_array_length; n++) {
3478 // Store a 32-bit offset into the header of the operand array.
3479 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3480
3481 // Read a bootstrap specifier.
3482 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3483 const u2 bootstrap_method_index = cfs->get_u2_fast();
3484 const u2 argument_count = cfs->get_u2_fast();
3485 check_property(
3486 valid_cp_range(bootstrap_method_index, cp_size) &&
3487 cp->tag_at(bootstrap_method_index).is_method_handle(),
3488 "bootstrap_method_index %u has bad constant type in class file %s",
3489 bootstrap_method_index,
3490 CHECK);
3491
3492 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3493 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3494 CHECK);
3495
3496 operands->at_put(operand_fill_index++, bootstrap_method_index);
3497 operands->at_put(operand_fill_index++, argument_count);
3498
3499 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3500 for (int j = 0; j < argument_count; j++) {
3501 const u2 argument_index = cfs->get_u2_fast();
3502 check_property(
3503 valid_cp_range(argument_index, cp_size) &&
3504 cp->tag_at(argument_index).is_loadable_constant(),
3505 "argument_index %u has bad constant type in class file %s",
3506 argument_index,
3507 CHECK);
3508 operands->at_put(operand_fill_index++, argument_index);
3509 }
3510 }
3511 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3512 "Bad length on BootstrapMethods in class file %s",
3513 CHECK);
3514 }
3515
3516 bool ClassFileParser::supports_sealed_types() {
3517 return _major_version == JVM_CLASSFILE_MAJOR_VERSION &&
3518 _minor_version == JAVA_PREVIEW_MINOR_VERSION &&
3519 Arguments::enable_preview();
3520 }
3521
3522 bool ClassFileParser::supports_records() {
3523 return _major_version == JVM_CLASSFILE_MAJOR_VERSION &&
3524 _minor_version == JAVA_PREVIEW_MINOR_VERSION &&
3525 Arguments::enable_preview();
3526 }
3527
3528 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3529 ConstantPool* cp,
3530 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3531 TRAPS) {
3532 assert(cfs != NULL, "invariant");
3533 assert(cp != NULL, "invariant");
3534 assert(parsed_annotations != NULL, "invariant");
3535
3536 // Set inner classes attribute to default sentinel
3537 _inner_classes = Universe::the_empty_short_array();
3538 // Set nest members attribute to default sentinel
3539 _nest_members = Universe::the_empty_short_array();
3540 // Set _permitted_subclasses attribute to default sentinel
3541 _permitted_subclasses = Universe::the_empty_short_array();
3542 cfs->guarantee_more(2, CHECK); // attributes_count
3543 u2 attributes_count = cfs->get_u2_fast();
3544 bool parsed_sourcefile_attribute = false;
3545 bool parsed_innerclasses_attribute = false;
3546 bool parsed_nest_members_attribute = false;
3547 bool parsed_permitted_subclasses_attribute = false;
3548 bool parsed_nest_host_attribute = false;
3549 bool parsed_record_attribute = false;
3550 bool parsed_enclosingmethod_attribute = false;
3551 bool parsed_bootstrap_methods_attribute = false;
3552 const u1* runtime_visible_annotations = NULL;
3553 int runtime_visible_annotations_length = 0;
3554 const u1* runtime_invisible_annotations = NULL;
3555 int runtime_invisible_annotations_length = 0;
3556 const u1* runtime_visible_type_annotations = NULL;
3557 int runtime_visible_type_annotations_length = 0;
3558 const u1* runtime_invisible_type_annotations = NULL;
3559 int runtime_invisible_type_annotations_length = 0;
3560 bool runtime_invisible_type_annotations_exists = false;
3561 bool runtime_invisible_annotations_exists = false;
3562 bool parsed_source_debug_ext_annotations_exist = false;
3563 const u1* inner_classes_attribute_start = NULL;
3564 u4 inner_classes_attribute_length = 0;
3565 u2 enclosing_method_class_index = 0;
3566 u2 enclosing_method_method_index = 0;
3567 const u1* nest_members_attribute_start = NULL;
3568 u4 nest_members_attribute_length = 0;
3569 const u1* record_attribute_start = NULL;
3570 u4 record_attribute_length = 0;
3571 const u1* permitted_subclasses_attribute_start = NULL;
3572 u4 permitted_subclasses_attribute_length = 0;
3573
3574 // Iterate over attributes
3575 while (attributes_count--) {
3576 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3577 const u2 attribute_name_index = cfs->get_u2_fast();
3578 const u4 attribute_length = cfs->get_u4_fast();
3579 check_property(
3580 valid_symbol_at(attribute_name_index),
3581 "Attribute name has bad constant pool index %u in class file %s",
3582 attribute_name_index, CHECK);
3583 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3584 if (tag == vmSymbols::tag_source_file()) {
3585 // Check for SourceFile tag
3586 if (_need_verify) {
3587 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3588 }
3589 if (parsed_sourcefile_attribute) {
3590 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3591 } else {
3592 parsed_sourcefile_attribute = true;
3593 }
3594 parse_classfile_sourcefile_attribute(cfs, CHECK);
3595 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3596 // Check for SourceDebugExtension tag
3597 if (parsed_source_debug_ext_annotations_exist) {
3598 classfile_parse_error(
3599 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3600 }
3601 parsed_source_debug_ext_annotations_exist = true;
3602 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3603 } else if (tag == vmSymbols::tag_inner_classes()) {
3604 // Check for InnerClasses tag
3605 if (parsed_innerclasses_attribute) {
3606 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3607 } else {
3608 parsed_innerclasses_attribute = true;
3609 }
3610 inner_classes_attribute_start = cfs->current();
3611 inner_classes_attribute_length = attribute_length;
3612 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3613 } else if (tag == vmSymbols::tag_synthetic()) {
3614 // Check for Synthetic tag
3615 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3616 if (attribute_length != 0) {
3617 classfile_parse_error(
3618 "Invalid Synthetic classfile attribute length %u in class file %s",
3619 attribute_length, CHECK);
3620 }
3621 parse_classfile_synthetic_attribute(CHECK);
3622 } else if (tag == vmSymbols::tag_deprecated()) {
3623 // Check for Deprecatd tag - 4276120
3624 if (attribute_length != 0) {
3625 classfile_parse_error(
3626 "Invalid Deprecated classfile attribute length %u in class file %s",
3627 attribute_length, CHECK);
3628 }
3629 } else if (_major_version >= JAVA_1_5_VERSION) {
3630 if (tag == vmSymbols::tag_signature()) {
3631 if (_generic_signature_index != 0) {
3632 classfile_parse_error(
3633 "Multiple Signature attributes in class file %s", CHECK);
3634 }
3635 if (attribute_length != 2) {
3636 classfile_parse_error(
3637 "Wrong Signature attribute length %u in class file %s",
3638 attribute_length, CHECK);
3639 }
3640 parse_classfile_signature_attribute(cfs, CHECK);
3641 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3642 if (runtime_visible_annotations != NULL) {
3643 classfile_parse_error(
3644 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3645 }
3646 runtime_visible_annotations_length = attribute_length;
3647 runtime_visible_annotations = cfs->current();
3648 assert(runtime_visible_annotations != NULL, "null visible annotations");
3649 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3650 parse_annotations(cp,
3651 runtime_visible_annotations,
3652 runtime_visible_annotations_length,
3653 parsed_annotations,
3654 _loader_data,
3655 _can_access_vm_annotations,
3656 CHECK);
3657 cfs->skip_u1_fast(runtime_visible_annotations_length);
3658 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3659 if (runtime_invisible_annotations_exists) {
3660 classfile_parse_error(
3661 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3662 }
3663 runtime_invisible_annotations_exists = true;
3664 if (PreserveAllAnnotations) {
3665 runtime_invisible_annotations_length = attribute_length;
3666 runtime_invisible_annotations = cfs->current();
3667 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3668 }
3669 cfs->skip_u1(attribute_length, CHECK);
3670 } else if (tag == vmSymbols::tag_enclosing_method()) {
3671 if (parsed_enclosingmethod_attribute) {
3672 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3673 } else {
3674 parsed_enclosingmethod_attribute = true;
3675 }
3676 guarantee_property(attribute_length == 4,
3677 "Wrong EnclosingMethod attribute length %u in class file %s",
3678 attribute_length, CHECK);
3679 cfs->guarantee_more(4, CHECK); // class_index, method_index
3680 enclosing_method_class_index = cfs->get_u2_fast();
3681 enclosing_method_method_index = cfs->get_u2_fast();
3682 if (enclosing_method_class_index == 0) {
3683 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3684 }
3685 // Validate the constant pool indices and types
3686 check_property(valid_klass_reference_at(enclosing_method_class_index),
3687 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3688 if (enclosing_method_method_index != 0 &&
3689 (!cp->is_within_bounds(enclosing_method_method_index) ||
3690 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3691 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3692 }
3693 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3694 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3695 if (parsed_bootstrap_methods_attribute) {
3696 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3697 }
3698 parsed_bootstrap_methods_attribute = true;
3699 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3700 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3701 if (runtime_visible_type_annotations != NULL) {
3702 classfile_parse_error(
3703 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3704 }
3705 runtime_visible_type_annotations_length = attribute_length;
3706 runtime_visible_type_annotations = cfs->current();
3707 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3708 // No need for the VM to parse Type annotations
3709 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3710 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3711 if (runtime_invisible_type_annotations_exists) {
3712 classfile_parse_error(
3713 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3714 } else {
3715 runtime_invisible_type_annotations_exists = true;
3716 }
3717 if (PreserveAllAnnotations) {
3718 runtime_invisible_type_annotations_length = attribute_length;
3719 runtime_invisible_type_annotations = cfs->current();
3720 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3721 }
3722 cfs->skip_u1(attribute_length, CHECK);
3723 } else if (_major_version >= JAVA_11_VERSION) {
3724 if (tag == vmSymbols::tag_nest_members()) {
3725 // Check for NestMembers tag
3726 if (parsed_nest_members_attribute) {
3727 classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3728 } else {
3729 parsed_nest_members_attribute = true;
3730 }
3731 if (parsed_nest_host_attribute) {
3732 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3733 }
3734 nest_members_attribute_start = cfs->current();
3735 nest_members_attribute_length = attribute_length;
3736 cfs->skip_u1(nest_members_attribute_length, CHECK);
3737 } else if (tag == vmSymbols::tag_nest_host()) {
3738 if (parsed_nest_host_attribute) {
3739 classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3740 } else {
3741 parsed_nest_host_attribute = true;
3742 }
3743 if (parsed_nest_members_attribute) {
3744 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3745 }
3746 if (_need_verify) {
3747 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3748 }
3749 cfs->guarantee_more(2, CHECK);
3750 u2 class_info_index = cfs->get_u2_fast();
3751 check_property(
3752 valid_klass_reference_at(class_info_index),
3753 "Nest-host class_info_index %u has bad constant type in class file %s",
3754 class_info_index, CHECK);
3755 _nest_host = class_info_index;
3756 } else if (_major_version >= JAVA_14_VERSION) {
3757 if (tag == vmSymbols::tag_record()) {
3758 // Skip over Record attribute if not supported or if super class is
3759 // not java.lang.Record.
3760 if (supports_records() &&
3761 cp->klass_name_at(_super_class_index) == vmSymbols::java_lang_Record()) {
3762 if (parsed_record_attribute) {
3763 classfile_parse_error("Multiple Record attributes in class file %s", CHECK);
3764 }
3765 // Check that class is final and not abstract.
3766 if (!_access_flags.is_final() || _access_flags.is_abstract()) {
3767 classfile_parse_error("Record attribute in non-final or abstract class file %s", CHECK);
3768 }
3769 parsed_record_attribute = true;
3770 record_attribute_start = cfs->current();
3771 record_attribute_length = attribute_length;
3772 } else if (log_is_enabled(Info, class, record)) {
3773 // Log why the Record attribute was ignored. Note that if the
3774 // class file version is JVM_CLASSFILE_MAJOR_VERSION.65535 and
3775 // --enable-preview wasn't specified then a java.lang.UnsupportedClassVersionError
3776 // exception would have been thrown.
3777 ResourceMark rm(THREAD);
3778 if (supports_records()) {
3779 log_info(class, record)(
3780 "Ignoring Record attribute in class %s because super type is not java.lang.Record",
3781 _class_name->as_C_string());
3782 } else {
3783 log_info(class, record)(
3784 "Ignoring Record attribute in class %s because class file version is not %d.65535",
3785 _class_name->as_C_string(), JVM_CLASSFILE_MAJOR_VERSION);
3786 }
3787 }
3788 cfs->skip_u1(attribute_length, CHECK);
3789 } else if (_major_version >= JAVA_15_VERSION) {
3790 // Check for PermittedSubclasses tag
3791 if (tag == vmSymbols::tag_permitted_subclasses()) {
3792 if (supports_sealed_types()) {
3793 if (parsed_permitted_subclasses_attribute) {
3794 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
3795 }
3796 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
3797 if (_access_flags.is_final()) {
3798 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
3799 }
3800 parsed_permitted_subclasses_attribute = true;
3801 permitted_subclasses_attribute_start = cfs->current();
3802 permitted_subclasses_attribute_length = attribute_length;
3803 }
3804 cfs->skip_u1(attribute_length, CHECK);
3805 } else {
3806 // Unknown attribute
3807 cfs->skip_u1(attribute_length, CHECK);
3808 }
3809 } else {
3810 // Unknown attribute
3811 cfs->skip_u1(attribute_length, CHECK);
3812 }
3813 } else {
3814 // Unknown attribute
3815 cfs->skip_u1(attribute_length, CHECK);
3816 }
3817 } else {
3818 // Unknown attribute
3819 cfs->skip_u1(attribute_length, CHECK);
3820 }
3821 } else {
3822 // Unknown attribute
3823 cfs->skip_u1(attribute_length, CHECK);
3824 }
3825 }
3826 _class_annotations = assemble_annotations(runtime_visible_annotations,
3827 runtime_visible_annotations_length,
3828 runtime_invisible_annotations,
3829 runtime_invisible_annotations_length,
3830 CHECK);
3831 _class_type_annotations = assemble_annotations(runtime_visible_type_annotations,
3832 runtime_visible_type_annotations_length,
3833 runtime_invisible_type_annotations,
3834 runtime_invisible_type_annotations_length,
3835 CHECK);
3836
3837 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3838 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3839 cfs,
3840 inner_classes_attribute_start,
3841 parsed_innerclasses_attribute,
3842 enclosing_method_class_index,
3843 enclosing_method_method_index,
3844 CHECK);
3845 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3846 guarantee_property(
3847 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3848 "Wrong InnerClasses attribute length in class file %s", CHECK);
3849 }
3850 }
3851
3852 if (parsed_nest_members_attribute) {
3853 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3854 cfs,
3855 nest_members_attribute_start,
3856 CHECK);
3857 if (_need_verify) {
3858 guarantee_property(
3859 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3860 "Wrong NestMembers attribute length in class file %s", CHECK);
3861 }
3862 }
3863
3864 if (parsed_record_attribute) {
3865 const unsigned int calculated_attr_length = parse_classfile_record_attribute(
3866 cfs,
3867 cp,
3868 record_attribute_start,
3869 CHECK);
3870 if (_need_verify) {
3871 guarantee_property(record_attribute_length == calculated_attr_length,
3872 "Record attribute has wrong length in class file %s",
3873 CHECK);
3874 }
3875 }
3876
3877 if (parsed_permitted_subclasses_attribute) {
3878 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
3879 cfs,
3880 permitted_subclasses_attribute_start,
3881 CHECK);
3882 if (_need_verify) {
3883 guarantee_property(
3884 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
3885 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
3886 }
3887 }
3888
3889 if (_max_bootstrap_specifier_index >= 0) {
3890 guarantee_property(parsed_bootstrap_methods_attribute,
3891 "Missing BootstrapMethods attribute in class file %s", CHECK);
3892 }
3893 }
3894
3895 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3896 assert(k != NULL, "invariant");
3897
3898 if (_synthetic_flag)
3899 k->set_is_synthetic();
3900 if (_sourcefile_index != 0) {
3901 k->set_source_file_name_index(_sourcefile_index);
3902 }
3903 if (_generic_signature_index != 0) {
3904 k->set_generic_signature_index(_generic_signature_index);
3905 }
3906 if (_sde_buffer != NULL) {
3907 k->set_source_debug_extension(_sde_buffer, _sde_length);
3908 }
3909 }
3910
3911 // Create the Annotations object that will
3912 // hold the annotations array for the Klass.
3913 void ClassFileParser::create_combined_annotations(TRAPS) {
3914 if (_class_annotations == NULL &&
3915 _class_type_annotations == NULL &&
3916 _fields_annotations == NULL &&
3917 _fields_type_annotations == NULL) {
3918 // Don't create the Annotations object unnecessarily.
3919 return;
3920 }
3921
3922 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3923 annotations->set_class_annotations(_class_annotations);
3924 annotations->set_class_type_annotations(_class_type_annotations);
3925 annotations->set_fields_annotations(_fields_annotations);
3926 annotations->set_fields_type_annotations(_fields_type_annotations);
3927
3928 // This is the Annotations object that will be
3929 // assigned to InstanceKlass being constructed.
3930 _combined_annotations = annotations;
3931
3932 // The annotations arrays below has been transfered the
3933 // _combined_annotations so these fields can now be cleared.
3934 _class_annotations = NULL;
3935 _class_type_annotations = NULL;
3936 _fields_annotations = NULL;
3937 _fields_type_annotations = NULL;
3938 }
3939
3940 // Transfer ownership of metadata allocated to the InstanceKlass.
3941 void ClassFileParser::apply_parsed_class_metadata(
3942 InstanceKlass* this_klass,
3943 int java_fields_count,
3944 TRAPS) {
3945 assert(this_klass != NULL, "invariant");
3946
3947 _cp->set_pool_holder(this_klass);
3948 this_klass->set_constants(_cp);
3949 this_klass->set_fields(_fields, java_fields_count);
3950 this_klass->set_methods(_methods);
3951 this_klass->set_inner_classes(_inner_classes);
3952 this_klass->set_nest_members(_nest_members);
3953 this_klass->set_nest_host_index(_nest_host);
3954 this_klass->set_annotations(_combined_annotations);
3955 this_klass->set_permitted_subclasses(_permitted_subclasses);
3956 this_klass->set_record_components(_record_components);
3957 // Delay the setting of _local_interfaces and _transitive_interfaces until after
3958 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
3959 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
3960 // its _super. If an OOM occurs while loading the current klass, its _super field
3961 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3962 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3963 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3964
3965 // Clear out these fields so they don't get deallocated by the destructor
3966 clear_class_metadata();
3967 }
3968
3969 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3970 int runtime_visible_annotations_length,
3971 const u1* const runtime_invisible_annotations,
3972 int runtime_invisible_annotations_length,
3973 TRAPS) {
3974 AnnotationArray* annotations = NULL;
3975 if (runtime_visible_annotations != NULL ||
3976 runtime_invisible_annotations != NULL) {
3977 annotations = MetadataFactory::new_array<u1>(_loader_data,
3978 runtime_visible_annotations_length +
3979 runtime_invisible_annotations_length,
3980 CHECK_(annotations));
3981 if (runtime_visible_annotations != NULL) {
3982 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3983 annotations->at_put(i, runtime_visible_annotations[i]);
3984 }
3985 }
3986 if (runtime_invisible_annotations != NULL) {
3987 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3988 int append = runtime_visible_annotations_length+i;
3989 annotations->at_put(append, runtime_invisible_annotations[i]);
3990 }
3991 }
3992 }
3993 return annotations;
3994 }
3995
3996 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3997 const int super_class_index,
3998 const bool need_verify,
3999 TRAPS) {
4000 assert(cp != NULL, "invariant");
4001 const InstanceKlass* super_klass = NULL;
4002
4003 if (super_class_index == 0) {
4004 check_property(_class_name == vmSymbols::java_lang_Object(),
4005 "Invalid superclass index %u in class file %s",
4006 super_class_index,
4007 CHECK_NULL);
4008 } else {
4009 check_property(valid_klass_reference_at(super_class_index),
4010 "Invalid superclass index %u in class file %s",
4011 super_class_index,
4012 CHECK_NULL);
4013 // The class name should be legal because it is checked when parsing constant pool.
4014 // However, make sure it is not an array type.
4015 bool is_array = false;
4016 if (cp->tag_at(super_class_index).is_klass()) {
4017 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
4018 if (need_verify)
4019 is_array = super_klass->is_array_klass();
4020 } else if (need_verify) {
4021 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
4022 }
4023 if (need_verify) {
4024 guarantee_property(!is_array,
4025 "Bad superclass name in class file %s", CHECK_NULL);
4026 }
4027 }
4028 return super_klass;
4029 }
4030
4031 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
4032 _max_nonstatic_oop_maps = max_blocks;
4033 _nonstatic_oop_map_count = 0;
4034 if (max_blocks == 0) {
4035 _nonstatic_oop_maps = NULL;
4036 } else {
4037 _nonstatic_oop_maps =
4038 NEW_RESOURCE_ARRAY(OopMapBlock, _max_nonstatic_oop_maps);
4039 memset(_nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
4040 }
4041 }
4042
4043 OopMapBlock* OopMapBlocksBuilder::last_oop_map() const {
4044 assert(_nonstatic_oop_map_count > 0, "Has no oop maps");
4045 return _nonstatic_oop_maps + (_nonstatic_oop_map_count - 1);
4046 }
4047
4048 // addition of super oop maps
4049 void OopMapBlocksBuilder::initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
4050 assert(nof_blocks && _nonstatic_oop_map_count == 0 &&
4051 nof_blocks <= _max_nonstatic_oop_maps, "invariant");
4052
4053 memcpy(_nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
4054 _nonstatic_oop_map_count += nof_blocks;
4055 }
4056
4057 // collection of oops
4058 void OopMapBlocksBuilder::add(int offset, int count) {
4059 if (_nonstatic_oop_map_count == 0) {
4060 _nonstatic_oop_map_count++;
4061 }
4062 OopMapBlock* nonstatic_oop_map = last_oop_map();
4063 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
4064 nonstatic_oop_map->set_offset(offset);
4065 nonstatic_oop_map->set_count(count);
4066 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
4067 nonstatic_oop_map->increment_count(count);
4068 } else { // Need a new one...
4069 _nonstatic_oop_map_count++;
4070 assert(_nonstatic_oop_map_count <= _max_nonstatic_oop_maps, "range check");
4071 nonstatic_oop_map = last_oop_map();
4072 nonstatic_oop_map->set_offset(offset);
4073 nonstatic_oop_map->set_count(count);
4074 }
4075 }
4076
4077 // general purpose copy, e.g. into allocated instanceKlass
4078 void OopMapBlocksBuilder::copy(OopMapBlock* dst) {
4079 if (_nonstatic_oop_map_count != 0) {
4080 memcpy(dst, _nonstatic_oop_maps, sizeof(OopMapBlock) * _nonstatic_oop_map_count);
4081 }
4082 }
4083
4084 // Sort and compact adjacent blocks
4085 void OopMapBlocksBuilder::compact() {
4086 if (_nonstatic_oop_map_count <= 1) {
4087 return;
4088 }
4089 /*
4090 * Since field layout sneeks in oops before values, we will be able to condense
4091 * blocks. There is potential to compact between super, own refs and values
4092 * containing refs.
4093 *
4094 * Currently compaction is slightly limited due to values being 8 byte aligned.
4095 * This may well change: FixMe if it doesn't, the code below is fairly general purpose
4096 * and maybe it doesn't need to be.
4097 */
4098 qsort(_nonstatic_oop_maps, _nonstatic_oop_map_count, sizeof(OopMapBlock),
4099 (_sort_Fn)OopMapBlock::compare_offset);
4100 if (_nonstatic_oop_map_count < 2) {
4101 return;
4102 }
4103
4104 // Make a temp copy, and iterate through and copy back into the original
4105 ResourceMark rm;
4106 OopMapBlock* oop_maps_copy =
4107 NEW_RESOURCE_ARRAY(OopMapBlock, _nonstatic_oop_map_count);
4108 OopMapBlock* oop_maps_copy_end = oop_maps_copy + _nonstatic_oop_map_count;
4109 copy(oop_maps_copy);
4110 OopMapBlock* nonstatic_oop_map = _nonstatic_oop_maps;
4111 unsigned int new_count = 1;
4112 oop_maps_copy++;
4113 while(oop_maps_copy < oop_maps_copy_end) {
4114 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
4115 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
4116 nonstatic_oop_map->increment_count(oop_maps_copy->count());
4117 } else {
4118 nonstatic_oop_map++;
4119 new_count++;
4120 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
4121 nonstatic_oop_map->set_count(oop_maps_copy->count());
4122 }
4123 oop_maps_copy++;
4124 }
4125 assert(new_count <= _nonstatic_oop_map_count, "end up with more maps after compact() ?");
4126 _nonstatic_oop_map_count = new_count;
4127 }
4128
4129 void OopMapBlocksBuilder::print_on(outputStream* st) const {
4130 st->print_cr(" OopMapBlocks: %3d /%3d", _nonstatic_oop_map_count, _max_nonstatic_oop_maps);
4131 if (_nonstatic_oop_map_count > 0) {
4132 OopMapBlock* map = _nonstatic_oop_maps;
4133 OopMapBlock* last_map = last_oop_map();
4134 assert(map <= last_map, "Last less than first");
4135 while (map <= last_map) {
4136 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
4137 map->offset() + map->offset_span() - heapOopSize, map->count());
4138 map++;
4139 }
4140 }
4141 }
4142
4143 void OopMapBlocksBuilder::print_value_on(outputStream* st) const {
4144 print_on(st);
4145 }
4146
4147 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4148 assert(ik != NULL, "invariant");
4149
4150 const Klass* const super = ik->super();
4151
4152 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4153 // in which case we don't have to register objects as finalizable
4154 if (!_has_empty_finalizer) {
4155 if (_has_finalizer ||
4156 (super != NULL && super->has_finalizer())) {
4157 ik->set_has_finalizer();
4158 }
4159 }
4160
4161 #ifdef ASSERT
4162 bool f = false;
4163 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4164 vmSymbols::void_method_signature());
4165 if (m != NULL && !m->is_empty_method()) {
4166 f = true;
4167 }
4168
4169 // Spec doesn't prevent agent from redefinition of empty finalizer.
4170 // Despite the fact that it's generally bad idea and redefined finalizer
4171 // will not work as expected we shouldn't abort vm in this case
4172 if (!ik->has_redefined_this_or_super()) {
4173 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4174 }
4175 #endif
4176
4177 // Check if this klass supports the java.lang.Cloneable interface
4178 if (SystemDictionary::Cloneable_klass_loaded()) {
4179 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4180 ik->set_is_cloneable();
4181 }
4182 }
4183
4184 // Check if this klass has a vanilla default constructor
4185 if (super == NULL) {
4186 // java.lang.Object has empty default constructor
4187 ik->set_has_vanilla_constructor();
4188 } else {
4189 if (super->has_vanilla_constructor() &&
4190 _has_vanilla_constructor) {
4191 ik->set_has_vanilla_constructor();
4192 }
4193 #ifdef ASSERT
4194 bool v = false;
4195 if (super->has_vanilla_constructor()) {
4196 const Method* const constructor =
4197 ik->find_method(vmSymbols::object_initializer_name(),
4198 vmSymbols::void_method_signature());
4199 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4200 v = true;
4201 }
4202 }
4203 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4204 #endif
4205 }
4206
4207 // If it cannot be fast-path allocated, set a bit in the layout helper.
4208 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4209 assert(ik->size_helper() > 0, "layout_helper is initialized");
4210 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4211 || ik->is_abstract() || ik->is_interface()
4212 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4213 || ik->size_helper() >= FastAllocateSizeLimit) {
4214 // Forbid fast-path allocation.
4215 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4216 ik->set_layout_helper(lh);
4217 }
4218 }
4219
4220 // utility methods for appending an array with check for duplicates
4221
4222 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4223 const Array<InstanceKlass*>* const ifs) {
4224 // iterate over new interfaces
4225 for (int i = 0; i < ifs->length(); i++) {
4226 InstanceKlass* const e = ifs->at(i);
4227 assert(e->is_klass() && e->is_interface(), "just checking");
4228 // add new interface
4229 result->append_if_missing(e);
4230 }
4231 }
4232
4233 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4234 Array<InstanceKlass*>* local_ifs,
4235 ClassLoaderData* loader_data,
4236 TRAPS) {
4237 assert(local_ifs != NULL, "invariant");
4238 assert(loader_data != NULL, "invariant");
4239
4240 // Compute maximum size for transitive interfaces
4241 int max_transitive_size = 0;
4242 int super_size = 0;
4243 // Add superclass transitive interfaces size
4244 if (super != NULL) {
4245 super_size = super->transitive_interfaces()->length();
4246 max_transitive_size += super_size;
4247 }
4248 // Add local interfaces' super interfaces
4249 const int local_size = local_ifs->length();
4250 for (int i = 0; i < local_size; i++) {
4251 InstanceKlass* const l = local_ifs->at(i);
4252 max_transitive_size += l->transitive_interfaces()->length();
4253 }
4254 // Finally add local interfaces
4255 max_transitive_size += local_size;
4256 // Construct array
4257 if (max_transitive_size == 0) {
4258 // no interfaces, use canonicalized array
4259 return Universe::the_empty_instance_klass_array();
4260 } else if (max_transitive_size == super_size) {
4261 // no new local interfaces added, share superklass' transitive interface array
4262 return super->transitive_interfaces();
4263 } else if (max_transitive_size == local_size) {
4264 // only local interfaces added, share local interface array
4265 return local_ifs;
4266 } else {
4267 ResourceMark rm;
4268 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4269
4270 // Copy down from superclass
4271 if (super != NULL) {
4272 append_interfaces(result, super->transitive_interfaces());
4273 }
4274
4275 // Copy down from local interfaces' superinterfaces
4276 for (int i = 0; i < local_size; i++) {
4277 InstanceKlass* const l = local_ifs->at(i);
4278 append_interfaces(result, l->transitive_interfaces());
4279 }
4280 // Finally add local interfaces
4281 append_interfaces(result, local_ifs);
4282
4283 // length will be less than the max_transitive_size if duplicates were removed
4284 const int length = result->length();
4285 assert(length <= max_transitive_size, "just checking");
4286 Array<InstanceKlass*>* const new_result =
4287 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4288 for (int i = 0; i < length; i++) {
4289 InstanceKlass* const e = result->at(i);
4290 assert(e != NULL, "just checking");
4291 new_result->at_put(i, e);
4292 }
4293 return new_result;
4294 }
4295 }
4296
4297 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4298 assert(this_klass != NULL, "invariant");
4299 const Klass* const super = this_klass->super();
4300
4301 if (super != NULL) {
4302 const InstanceKlass* super_ik = InstanceKlass::cast(super);
4303
4304 if (super->is_final()) {
4305 ResourceMark rm(THREAD);
4306 Exceptions::fthrow(
4307 THREAD_AND_LOCATION,
4308 vmSymbols::java_lang_VerifyError(),
4309 "class %s cannot inherit from final class %s",
4310 this_klass->external_name(),
4311 super_ik->external_name());
4312 return;
4313 }
4314
4315 if (super_ik->is_sealed() && !super_ik->has_as_permitted_subclass(this_klass)) {
4316 ResourceMark rm(THREAD);
4317 Exceptions::fthrow(
4318 THREAD_AND_LOCATION,
4319 vmSymbols::java_lang_IncompatibleClassChangeError(),
4320 "class %s cannot inherit from sealed class %s",
4321 this_klass->external_name(),
4322 super_ik->external_name());
4323 return;
4324 }
4325
4326 // If the loader is not the boot loader then throw an exception if its
4327 // superclass is in package jdk.internal.reflect and its loader is not a
4328 // special reflection class loader
4329 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4330 PackageEntry* super_package = super->package();
4331 if (super_package != NULL &&
4332 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4333 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4334 ResourceMark rm(THREAD);
4335 Exceptions::fthrow(
4336 THREAD_AND_LOCATION,
4337 vmSymbols::java_lang_IllegalAccessError(),
4338 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4339 this_klass->external_name(),
4340 this_klass->class_loader_data()->loader_name_and_id(),
4341 super->external_name());
4342 return;
4343 }
4344 }
4345
4346 Reflection::VerifyClassAccessResults vca_result =
4347 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4348 if (vca_result != Reflection::ACCESS_OK) {
4349 ResourceMark rm(THREAD);
4350 char* msg = Reflection::verify_class_access_msg(this_klass,
4351 InstanceKlass::cast(super),
4352 vca_result);
4353 if (msg == NULL) {
4354 bool same_module = (this_klass->module() == super->module());
4355 Exceptions::fthrow(
4356 THREAD_AND_LOCATION,
4357 vmSymbols::java_lang_IllegalAccessError(),
4358 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4359 this_klass->external_name(),
4360 super->is_abstract() ? "abstract " : "",
4361 super->external_name(),
4362 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4363 (same_module) ? "" : "; ",
4364 (same_module) ? "" : super->class_in_module_of_loader());
4365 } else {
4366 // Add additional message content.
4367 Exceptions::fthrow(
4368 THREAD_AND_LOCATION,
4369 vmSymbols::java_lang_IllegalAccessError(),
4370 "superclass access check failed: %s",
4371 msg);
4372 }
4373 }
4374 }
4375 }
4376
4377
4378 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4379 assert(this_klass != NULL, "invariant");
4380 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4381 const int lng = local_interfaces->length();
4382 for (int i = lng - 1; i >= 0; i--) {
4383 InstanceKlass* const k = local_interfaces->at(i);
4384 assert (k != NULL && k->is_interface(), "invalid interface");
4385
4386 if (k->is_sealed() && !k->has_as_permitted_subclass(this_klass)) {
4387 ResourceMark rm(THREAD);
4388 Exceptions::fthrow(
4389 THREAD_AND_LOCATION,
4390 vmSymbols::java_lang_IncompatibleClassChangeError(),
4391 "class %s cannot %s sealed interface %s",
4392 this_klass->external_name(),
4393 this_klass->is_interface() ? "extend" : "implement",
4394 k->external_name());
4395 return;
4396 }
4397
4398 Reflection::VerifyClassAccessResults vca_result =
4399 Reflection::verify_class_access(this_klass, k, false);
4400 if (vca_result != Reflection::ACCESS_OK) {
4401 ResourceMark rm(THREAD);
4402 char* msg = Reflection::verify_class_access_msg(this_klass,
4403 k,
4404 vca_result);
4405 if (msg == NULL) {
4406 bool same_module = (this_klass->module() == k->module());
4407 Exceptions::fthrow(
4408 THREAD_AND_LOCATION,
4409 vmSymbols::java_lang_IllegalAccessError(),
4410 "class %s cannot access its superinterface %s (%s%s%s)",
4411 this_klass->external_name(),
4412 k->external_name(),
4413 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4414 (same_module) ? "" : "; ",
4415 (same_module) ? "" : k->class_in_module_of_loader());
4416 } else {
4417 // Add additional message content.
4418 Exceptions::fthrow(
4419 THREAD_AND_LOCATION,
4420 vmSymbols::java_lang_IllegalAccessError(),
4421 "superinterface check failed: %s",
4422 msg);
4423 }
4424 }
4425 }
4426 }
4427
4428
4429 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4430 assert(this_klass != NULL, "invariant");
4431 const Array<Method*>* const methods = this_klass->methods();
4432 const int num_methods = methods->length();
4433
4434 // go thru each method and check if it overrides a final method
4435 for (int index = 0; index < num_methods; index++) {
4436 const Method* const m = methods->at(index);
4437
4438 // skip private, static, and <init> methods
4439 if ((!m->is_private() && !m->is_static()) &&
4440 (m->name() != vmSymbols::object_initializer_name())) {
4441
4442 const Symbol* const name = m->name();
4443 const Symbol* const signature = m->signature();
4444 const Klass* k = this_klass->super();
4445 const Method* super_m = NULL;
4446 while (k != NULL) {
4447 // skip supers that don't have final methods.
4448 if (k->has_final_method()) {
4449 // lookup a matching method in the super class hierarchy
4450 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4451 if (super_m == NULL) {
4452 break; // didn't find any match; get out
4453 }
4454
4455 if (super_m->is_final() && !super_m->is_static() &&
4456 !super_m->access_flags().is_private()) {
4457 // matching method in super is final, and not static or private
4458 bool can_access = Reflection::verify_member_access(this_klass,
4459 super_m->method_holder(),
4460 super_m->method_holder(),
4461 super_m->access_flags(),
4462 false, false, CHECK);
4463 if (can_access) {
4464 // this class can access super final method and therefore override
4465 ResourceMark rm(THREAD);
4466 Exceptions::fthrow(THREAD_AND_LOCATION,
4467 vmSymbols::java_lang_VerifyError(),
4468 "class %s overrides final method %s.%s%s",
4469 this_klass->external_name(),
4470 super_m->method_holder()->external_name(),
4471 name->as_C_string(),
4472 signature->as_C_string()
4473 );
4474 return;
4475 }
4476 }
4477
4478 // continue to look from super_m's holder's super.
4479 k = super_m->method_holder()->super();
4480 continue;
4481 }
4482
4483 k = k->super();
4484 }
4485 }
4486 }
4487 }
4488
4489
4490 // assumes that this_klass is an interface
4491 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4492 assert(this_klass != NULL, "invariant");
4493 assert(this_klass->is_interface(), "not an interface");
4494 const Array<Method*>* methods = this_klass->methods();
4495 const int num_methods = methods->length();
4496
4497 for (int index = 0; index < num_methods; index++) {
4498 const Method* const m = methods->at(index);
4499 // if m is static and not the init method, throw a verify error
4500 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4501 ResourceMark rm(THREAD);
4502 Exceptions::fthrow(
4503 THREAD_AND_LOCATION,
4504 vmSymbols::java_lang_VerifyError(),
4505 "Illegal static method %s in interface %s",
4506 m->name()->as_C_string(),
4507 this_klass->external_name()
4508 );
4509 return;
4510 }
4511 }
4512 }
4513
4514 // utility methods for format checking
4515
4516 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4517 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4518 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4519 if (is_module) {
4520 ResourceMark rm(THREAD);
4521 Exceptions::fthrow(
4522 THREAD_AND_LOCATION,
4523 vmSymbols::java_lang_NoClassDefFoundError(),
4524 "%s is not a class because access_flag ACC_MODULE is set",
4525 _class_name->as_C_string());
4526 return;
4527 }
4528
4529 if (!_need_verify) { return; }
4530
4531 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4532 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4533 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4534 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4535 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4536 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4537 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4538 const bool major_gte_14 = _major_version >= JAVA_14_VERSION;
4539
4540 if ((is_abstract && is_final) ||
4541 (is_interface && !is_abstract) ||
4542 (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4543 (!is_interface && major_gte_1_5 && is_annotation)) {
4544 ResourceMark rm(THREAD);
4545 Exceptions::fthrow(
4546 THREAD_AND_LOCATION,
4547 vmSymbols::java_lang_ClassFormatError(),
4548 "Illegal class modifiers in class %s: 0x%X",
4549 _class_name->as_C_string(), flags
4550 );
4551 return;
4552 }
4553 }
4554
4555 static bool has_illegal_visibility(jint flags) {
4556 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4557 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4558 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4559
4560 return ((is_public && is_protected) ||
4561 (is_public && is_private) ||
4562 (is_protected && is_private));
4563 }
4564
4565 // A legal major_version.minor_version must be one of the following:
4566 //
4567 // Major_version >= 45 and major_version < 56, any minor_version.
4568 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4569 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4570 //
4571 static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4572 ResourceMark rm(THREAD);
4573 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4574 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4575 Exceptions::fthrow(
4576 THREAD_AND_LOCATION,
4577 vmSymbols::java_lang_UnsupportedClassVersionError(),
4578 "%s (class file version %u.%u) was compiled with an invalid major version",
4579 class_name->as_C_string(), major, minor);
4580 return;
4581 }
4582
4583 if (major > max_version) {
4584 Exceptions::fthrow(
4585 THREAD_AND_LOCATION,
4586 vmSymbols::java_lang_UnsupportedClassVersionError(),
4587 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4588 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4589 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4590 return;
4591 }
4592
4593 if (major < JAVA_12_VERSION || minor == 0) {
4594 return;
4595 }
4596
4597 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4598 if (major != max_version) {
4599 Exceptions::fthrow(
4600 THREAD_AND_LOCATION,
4601 vmSymbols::java_lang_UnsupportedClassVersionError(),
4602 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4603 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4604 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4605 return;
4606 }
4607
4608 if (!Arguments::enable_preview()) {
4609 Exceptions::fthrow(
4610 THREAD_AND_LOCATION,
4611 vmSymbols::java_lang_UnsupportedClassVersionError(),
4612 "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4613 class_name->as_C_string(), major, minor);
4614 return;
4615 }
4616
4617 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4618 Exceptions::fthrow(
4619 THREAD_AND_LOCATION,
4620 vmSymbols::java_lang_UnsupportedClassVersionError(),
4621 "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4622 class_name->as_C_string(), major, minor);
4623 }
4624 }
4625
4626 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4627 bool is_interface,
4628 TRAPS) const {
4629 if (!_need_verify) { return; }
4630
4631 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4632 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4633 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4634 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4635 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4636 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4637 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4638 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4639 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4640
4641 bool is_illegal = false;
4642
4643 if (is_interface) {
4644 if (!is_public || !is_static || !is_final || is_private ||
4645 is_protected || is_volatile || is_transient ||
4646 (major_gte_1_5 && is_enum)) {
4647 is_illegal = true;
4648 }
4649 } else { // not interface
4650 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4651 is_illegal = true;
4652 }
4653 }
4654
4655 if (is_illegal) {
4656 ResourceMark rm(THREAD);
4657 Exceptions::fthrow(
4658 THREAD_AND_LOCATION,
4659 vmSymbols::java_lang_ClassFormatError(),
4660 "Illegal field modifiers in class %s: 0x%X",
4661 _class_name->as_C_string(), flags);
4662 return;
4663 }
4664 }
4665
4666 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4667 bool is_interface,
4668 const Symbol* name,
4669 TRAPS) const {
4670 if (!_need_verify) { return; }
4671
4672 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4673 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4674 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4675 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4676 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4677 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4678 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4679 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4680 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4681 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4682 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4683 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4684 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4685
4686 bool is_illegal = false;
4687
4688 if (is_interface) {
4689 if (major_gte_8) {
4690 // Class file version is JAVA_8_VERSION or later Methods of
4691 // interfaces may set any of the flags except ACC_PROTECTED,
4692 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4693 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4694 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4695 (is_native || is_protected || is_final || is_synchronized) ||
4696 // If a specific method of a class or interface has its
4697 // ACC_ABSTRACT flag set, it must not have any of its
4698 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4699 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4700 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4701 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4702 (is_abstract && (is_private || is_static || is_strict))) {
4703 is_illegal = true;
4704 }
4705 } else if (major_gte_1_5) {
4706 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4707 if (!is_public || is_private || is_protected || is_static || is_final ||
4708 is_synchronized || is_native || !is_abstract || is_strict) {
4709 is_illegal = true;
4710 }
4711 } else {
4712 // Class file version is pre-JAVA_1_5_VERSION
4713 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4714 is_illegal = true;
4715 }
4716 }
4717 } else { // not interface
4718 if (has_illegal_visibility(flags)) {
4719 is_illegal = true;
4720 } else {
4721 if (is_initializer) {
4722 if (is_static || is_final || is_synchronized || is_native ||
4723 is_abstract || (major_gte_1_5 && is_bridge)) {
4724 is_illegal = true;
4725 }
4726 } else { // not initializer
4727 if (is_abstract) {
4728 if ((is_final || is_native || is_private || is_static ||
4729 (major_gte_1_5 && (is_synchronized || is_strict)))) {
4730 is_illegal = true;
4731 }
4732 }
4733 }
4734 }
4735 }
4736
4737 if (is_illegal) {
4738 ResourceMark rm(THREAD);
4739 Exceptions::fthrow(
4740 THREAD_AND_LOCATION,
4741 vmSymbols::java_lang_ClassFormatError(),
4742 "Method %s in class %s has illegal modifiers: 0x%X",
4743 name->as_C_string(), _class_name->as_C_string(), flags);
4744 return;
4745 }
4746 }
4747
4748 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4749 int length,
4750 TRAPS) const {
4751 assert(_need_verify, "only called when _need_verify is true");
4752 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4753 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4754 }
4755 }
4756
4757 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4758 // In class names, '/' separates unqualified names. This is verified in this function also.
4759 // Method names also may not contain the characters '<' or '>', unless <init>
4760 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4761 // method. Because these names have been checked as special cases before
4762 // calling this method in verify_legal_method_name.
4763 //
4764 // This method is also called from the modular system APIs in modules.cpp
4765 // to verify the validity of module and package names.
4766 bool ClassFileParser::verify_unqualified_name(const char* name,
4767 unsigned int length,
4768 int type) {
4769 if (length == 0) return false; // Must have at least one char.
4770 for (const char* p = name; p != name + length; p++) {
4771 switch(*p) {
4772 case JVM_SIGNATURE_DOT:
4773 case JVM_SIGNATURE_ENDCLASS:
4774 case JVM_SIGNATURE_ARRAY:
4775 // do not permit '.', ';', or '['
4776 return false;
4777 case JVM_SIGNATURE_SLASH:
4778 // check for '//' or leading or trailing '/' which are not legal
4779 // unqualified name must not be empty
4780 if (type == ClassFileParser::LegalClass) {
4781 if (p == name || p+1 >= name+length ||
4782 *(p+1) == JVM_SIGNATURE_SLASH) {
4783 return false;
4784 }
4785 } else {
4786 return false; // do not permit '/' unless it's class name
4787 }
4788 break;
4789 case JVM_SIGNATURE_SPECIAL:
4790 case JVM_SIGNATURE_ENDSPECIAL:
4791 // do not permit '<' or '>' in method names
4792 if (type == ClassFileParser::LegalMethod) {
4793 return false;
4794 }
4795 }
4796 }
4797 return true;
4798 }
4799
4800 // Take pointer to a UTF8 byte string (not NUL-terminated).
4801 // Skip over the longest part of the string that could
4802 // be taken as a fieldname. Allow '/' if slash_ok is true.
4803 // Return a pointer to just past the fieldname.
4804 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4805 // being true, we saw consecutive slashes (meaning we were looking for a
4806 // qualified path but found something that was badly-formed).
4807 static const char* skip_over_field_name(const char* const name,
4808 bool slash_ok,
4809 unsigned int length) {
4810 const char* p;
4811 jboolean last_is_slash = false;
4812 jboolean not_first_ch = false;
4813
4814 for (p = name; p != name + length; not_first_ch = true) {
4815 const char* old_p = p;
4816 jchar ch = *p;
4817 if (ch < 128) {
4818 p++;
4819 // quick check for ascii
4820 if ((ch >= 'a' && ch <= 'z') ||
4821 (ch >= 'A' && ch <= 'Z') ||
4822 (ch == '_' || ch == '$') ||
4823 (not_first_ch && ch >= '0' && ch <= '9')) {
4824 last_is_slash = false;
4825 continue;
4826 }
4827 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
4828 if (last_is_slash) {
4829 return NULL; // Don't permit consecutive slashes
4830 }
4831 last_is_slash = true;
4832 continue;
4833 }
4834 }
4835 else {
4836 jint unicode_ch;
4837 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4838 p = tmp_p;
4839 last_is_slash = false;
4840 // Check if ch is Java identifier start or is Java identifier part
4841 // 4672820: call java.lang.Character methods directly without generating separate tables.
4842 EXCEPTION_MARK;
4843 // return value
4844 JavaValue result(T_BOOLEAN);
4845 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
4846 JavaCallArguments args;
4847 args.push_int(unicode_ch);
4848
4849 if (not_first_ch) {
4850 // public static boolean isJavaIdentifierPart(char ch);
4851 JavaCalls::call_static(&result,
4852 SystemDictionary::Character_klass(),
4853 vmSymbols::isJavaIdentifierPart_name(),
4854 vmSymbols::int_bool_signature(),
4855 &args,
4856 THREAD);
4857 } else {
4858 // public static boolean isJavaIdentifierStart(char ch);
4859 JavaCalls::call_static(&result,
4860 SystemDictionary::Character_klass(),
4861 vmSymbols::isJavaIdentifierStart_name(),
4862 vmSymbols::int_bool_signature(),
4863 &args,
4864 THREAD);
4865 }
4866 if (HAS_PENDING_EXCEPTION) {
4867 CLEAR_PENDING_EXCEPTION;
4868 return NULL;
4869 }
4870 if(result.get_jboolean()) {
4871 continue;
4872 }
4873 }
4874 return (not_first_ch) ? old_p : NULL;
4875 }
4876 return (not_first_ch) ? p : NULL;
4877 }
4878
4879 // Take pointer to a UTF8 byte string (not NUL-terminated).
4880 // Skip over the longest part of the string that could
4881 // be taken as a field signature. Allow "void" if void_ok.
4882 // Return a pointer to just past the signature.
4883 // Return NULL if no legal signature is found.
4884 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4885 bool void_ok,
4886 unsigned int length,
4887 TRAPS) const {
4888 unsigned int array_dim = 0;
4889 while (length > 0) {
4890 switch (signature[0]) {
4891 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4892 case JVM_SIGNATURE_BOOLEAN:
4893 case JVM_SIGNATURE_BYTE:
4894 case JVM_SIGNATURE_CHAR:
4895 case JVM_SIGNATURE_SHORT:
4896 case JVM_SIGNATURE_INT:
4897 case JVM_SIGNATURE_FLOAT:
4898 case JVM_SIGNATURE_LONG:
4899 case JVM_SIGNATURE_DOUBLE:
4900 return signature + 1;
4901 case JVM_SIGNATURE_CLASS: {
4902 if (_major_version < JAVA_1_5_VERSION) {
4903 // Skip over the class name if one is there
4904 const char* const p = skip_over_field_name(signature + 1, true, --length);
4905
4906 // The next character better be a semicolon
4907 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
4908 return p + 1;
4909 }
4910 }
4911 else {
4912 // Skip leading 'L' and ignore first appearance of ';'
4913 signature++;
4914 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
4915 // Format check signature
4916 if (c != NULL) {
4917 int newlen = c - (char*) signature;
4918 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
4919 if (!legal) {
4920 classfile_parse_error("Class name is empty or contains illegal character "
4921 "in descriptor in class file %s",
4922 CHECK_NULL);
4923 return NULL;
4924 }
4925 return signature + newlen + 1;
4926 }
4927 }
4928 return NULL;
4929 }
4930 case JVM_SIGNATURE_ARRAY:
4931 array_dim++;
4932 if (array_dim > 255) {
4933 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4934 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_NULL);
4935 }
4936 // The rest of what's there better be a legal signature
4937 signature++;
4938 length--;
4939 void_ok = false;
4940 break;
4941 default:
4942 return NULL;
4943 }
4944 }
4945 return NULL;
4946 }
4947
4948 // Checks if name is a legal class name.
4949 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4950 if (!_need_verify || _relax_verify) { return; }
4951
4952 assert(name->refcount() > 0, "symbol must be kept alive");
4953 char* bytes = (char*)name->bytes();
4954 unsigned int length = name->utf8_length();
4955 bool legal = false;
4956
4957 if (length > 0) {
4958 const char* p;
4959 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4960 p = skip_over_field_signature(bytes, false, length, CHECK);
4961 legal = (p != NULL) && ((p - bytes) == (int)length);
4962 } else if (_major_version < JAVA_1_5_VERSION) {
4963 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4964 p = skip_over_field_name(bytes, true, length);
4965 legal = (p != NULL) && ((p - bytes) == (int)length);
4966 }
4967 } else {
4968 // 4900761: relax the constraints based on JSR202 spec
4969 // Class names may be drawn from the entire Unicode character set.
4970 // Identifiers between '/' must be unqualified names.
4971 // The utf8 string has been verified when parsing cpool entries.
4972 legal = verify_unqualified_name(bytes, length, LegalClass);
4973 }
4974 }
4975 if (!legal) {
4976 ResourceMark rm(THREAD);
4977 assert(_class_name != NULL, "invariant");
4978 Exceptions::fthrow(
4979 THREAD_AND_LOCATION,
4980 vmSymbols::java_lang_ClassFormatError(),
4981 "Illegal class name \"%.*s\" in class file %s", length, bytes,
4982 _class_name->as_C_string()
4983 );
4984 return;
4985 }
4986 }
4987
4988 // Checks if name is a legal field name.
4989 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4990 if (!_need_verify || _relax_verify) { return; }
4991
4992 char* bytes = (char*)name->bytes();
4993 unsigned int length = name->utf8_length();
4994 bool legal = false;
4995
4996 if (length > 0) {
4997 if (_major_version < JAVA_1_5_VERSION) {
4998 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4999 const char* p = skip_over_field_name(bytes, false, length);
5000 legal = (p != NULL) && ((p - bytes) == (int)length);
5001 }
5002 } else {
5003 // 4881221: relax the constraints based on JSR202 spec
5004 legal = verify_unqualified_name(bytes, length, LegalField);
5005 }
5006 }
5007
5008 if (!legal) {
5009 ResourceMark rm(THREAD);
5010 assert(_class_name != NULL, "invariant");
5011 Exceptions::fthrow(
5012 THREAD_AND_LOCATION,
5013 vmSymbols::java_lang_ClassFormatError(),
5014 "Illegal field name \"%.*s\" in class %s", length, bytes,
5015 _class_name->as_C_string()
5016 );
5017 return;
5018 }
5019 }
5020
5021 // Checks if name is a legal method name.
5022 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5023 if (!_need_verify || _relax_verify) { return; }
5024
5025 assert(name != NULL, "method name is null");
5026 char* bytes = (char*)name->bytes();
5027 unsigned int length = name->utf8_length();
5028 bool legal = false;
5029
5030 if (length > 0) {
5031 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
5032 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5033 legal = true;
5034 }
5035 } else if (_major_version < JAVA_1_5_VERSION) {
5036 const char* p;
5037 p = skip_over_field_name(bytes, false, length);
5038 legal = (p != NULL) && ((p - bytes) == (int)length);
5039 } else {
5040 // 4881221: relax the constraints based on JSR202 spec
5041 legal = verify_unqualified_name(bytes, length, LegalMethod);
5042 }
5043 }
5044
5045 if (!legal) {
5046 ResourceMark rm(THREAD);
5047 assert(_class_name != NULL, "invariant");
5048 Exceptions::fthrow(
5049 THREAD_AND_LOCATION,
5050 vmSymbols::java_lang_ClassFormatError(),
5051 "Illegal method name \"%.*s\" in class %s", length, bytes,
5052 _class_name->as_C_string()
5053 );
5054 return;
5055 }
5056 }
5057
5058
5059 // Checks if signature is a legal field signature.
5060 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5061 const Symbol* signature,
5062 TRAPS) const {
5063 if (!_need_verify) { return; }
5064
5065 const char* const bytes = (const char* const)signature->bytes();
5066 const unsigned int length = signature->utf8_length();
5067 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5068
5069 if (p == NULL || (p - bytes) != (int)length) {
5070 throwIllegalSignature("Field", name, signature, CHECK);
5071 }
5072 }
5073
5074 // Checks if signature is a legal method signature.
5075 // Returns number of parameters
5076 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5077 const Symbol* signature,
5078 TRAPS) const {
5079 if (!_need_verify) {
5080 // make sure caller's args_size will be less than 0 even for non-static
5081 // method so it will be recomputed in compute_size_of_parameters().
5082 return -2;
5083 }
5084
5085 // Class initializers cannot have args for class format version >= 51.
5086 if (name == vmSymbols::class_initializer_name() &&
5087 signature != vmSymbols::void_method_signature() &&
5088 _major_version >= JAVA_7_VERSION) {
5089 throwIllegalSignature("Method", name, signature, CHECK_0);
5090 return 0;
5091 }
5092
5093 unsigned int args_size = 0;
5094 const char* p = (const char*)signature->bytes();
5095 unsigned int length = signature->utf8_length();
5096 const char* nextp;
5097
5098 // The first character must be a '('
5099 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5100 length--;
5101 // Skip over legal field signatures
5102 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5103 while ((length > 0) && (nextp != NULL)) {
5104 args_size++;
5105 if (p[0] == 'J' || p[0] == 'D') {
5106 args_size++;
5107 }
5108 length -= nextp - p;
5109 p = nextp;
5110 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5111 }
5112 // The first non-signature thing better be a ')'
5113 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5114 length--;
5115 if (name->utf8_length() > 0 && name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
5116 // All internal methods must return void
5117 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5118 return args_size;
5119 }
5120 } else {
5121 // Now we better just have a return value
5122 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5123 if (nextp && ((int)length == (nextp - p))) {
5124 return args_size;
5125 }
5126 }
5127 }
5128 }
5129 // Report error
5130 throwIllegalSignature("Method", name, signature, CHECK_0);
5131 return 0;
5132 }
5133
5134 int ClassFileParser::static_field_size() const {
5135 assert(_field_info != NULL, "invariant");
5136 return _field_info->_static_field_size;
5137 }
5138
5139 int ClassFileParser::total_oop_map_count() const {
5140 assert(_field_info != NULL, "invariant");
5141 return _field_info->oop_map_blocks->_nonstatic_oop_map_count;
5142 }
5143
5144 jint ClassFileParser::layout_size() const {
5145 assert(_field_info != NULL, "invariant");
5146 return _field_info->_instance_size;
5147 }
5148
5149 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5150 const Array<Method*>* methods) {
5151 assert(ik != NULL, "invariant");
5152 assert(methods != NULL, "invariant");
5153
5154 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5155 // (We used to do this lazily, but now we query it in Rewriter,
5156 // which is eagerly done for every method, so we might as well do it now,
5157 // when everything is fresh in memory.)
5158 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5159
5160 if (klass_id != vmSymbols::NO_SID) {
5161 for (int j = 0; j < methods->length(); ++j) {
5162 Method* method = methods->at(j);
5163 method->init_intrinsic_id();
5164
5165 if (CheckIntrinsics) {
5166 // Check if an intrinsic is defined for method 'method',
5167 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5168 if (method->intrinsic_id() != vmIntrinsics::_none &&
5169 !method->intrinsic_candidate()) {
5170 tty->print("Compiler intrinsic is defined for method [%s], "
5171 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5172 method->name_and_sig_as_C_string(),
5173 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5174 );
5175 tty->cr();
5176 DEBUG_ONLY(vm_exit(1));
5177 }
5178 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5179 // but there is no intrinsic available for it.
5180 if (method->intrinsic_candidate() &&
5181 method->intrinsic_id() == vmIntrinsics::_none) {
5182 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5183 "but no compiler intrinsic is defined for the method.%s",
5184 method->name_and_sig_as_C_string(),
5185 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5186 );
5187 tty->cr();
5188 DEBUG_ONLY(vm_exit(1));
5189 }
5190 }
5191 } // end for
5192
5193 #ifdef ASSERT
5194 if (CheckIntrinsics) {
5195 // Check for orphan methods in the current class. A method m
5196 // of a class C is orphan if an intrinsic is defined for method m,
5197 // but class C does not declare m.
5198 // The check is potentially expensive, therefore it is available
5199 // only in debug builds.
5200
5201 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5202 if (vmIntrinsics::_compiledLambdaForm == id) {
5203 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5204 // generated for the JVM from a LambdaForm and therefore no method
5205 // is defined for it.
5206 continue;
5207 }
5208
5209 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5210 // Check if the current class contains a method with the same
5211 // name, flags, signature.
5212 bool match = false;
5213 for (int j = 0; j < methods->length(); ++j) {
5214 const Method* method = methods->at(j);
5215 if (method->intrinsic_id() == id) {
5216 match = true;
5217 break;
5218 }
5219 }
5220
5221 if (!match) {
5222 char buf[1000];
5223 tty->print("Compiler intrinsic is defined for method [%s], "
5224 "but the method is not available in class [%s].%s",
5225 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5226 buf, sizeof(buf)),
5227 ik->name()->as_C_string(),
5228 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5229 );
5230 tty->cr();
5231 DEBUG_ONLY(vm_exit(1));
5232 }
5233 }
5234 } // end for
5235 } // CheckIntrinsics
5236 #endif // ASSERT
5237 }
5238 }
5239
5240 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
5241 const ClassInstanceInfo& cl_inst_info,
5242 TRAPS) {
5243 if (_klass != NULL) {
5244 return _klass;
5245 }
5246
5247 InstanceKlass* const ik =
5248 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5249
5250 if (is_hidden()) {
5251 mangle_hidden_class_name(ik);
5252 }
5253
5254 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5255
5256 assert(_klass == ik, "invariant");
5257
5258
5259 if (ik->should_store_fingerprint()) {
5260 ik->store_fingerprint(_stream->compute_fingerprint());
5261 }
5262
5263 ik->set_has_passed_fingerprint_check(false);
5264 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5265 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5266 uint64_t fp = ik->has_stored_fingerprint() ? ik->get_stored_fingerprint() : _stream->compute_fingerprint();
5267 if (aot_fp != 0 && aot_fp == fp) {
5268 // This class matches with a class saved in an AOT library
5269 ik->set_has_passed_fingerprint_check(true);
5270 } else {
5271 ResourceMark rm;
5272 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5273 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5274 }
5275 }
5276
5277 return ik;
5278 }
5279
5280 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5281 bool changed_by_loadhook,
5282 const ClassInstanceInfo& cl_inst_info,
5283 TRAPS) {
5284 assert(ik != NULL, "invariant");
5285
5286 // Set name and CLD before adding to CLD
5287 ik->set_class_loader_data(_loader_data);
5288 ik->set_name(_class_name);
5289
5290 // Add all classes to our internal class loader list here,
5291 // including classes in the bootstrap (NULL) class loader.
5292 const bool publicize = !is_internal();
5293
5294 _loader_data->add_class(ik, publicize);
5295
5296 set_klass_to_deallocate(ik);
5297
5298 assert(_field_info != NULL, "invariant");
5299 assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5300 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5301 "sanity");
5302
5303 assert(ik->is_instance_klass(), "sanity");
5304 assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5305
5306 // Fill in information already parsed
5307 ik->set_should_verify_class(_need_verify);
5308
5309 // Not yet: supers are done below to support the new subtype-checking fields
5310 ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5311 ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
5312 assert(_fac != NULL, "invariant");
5313 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5314
5315 // this transfers ownership of a lot of arrays from
5316 // the parser onto the InstanceKlass*
5317 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5318
5319 // can only set dynamic nest-host after static nest information is set
5320 if (cl_inst_info.dynamic_nest_host() != NULL) {
5321 ik->set_nest_host(cl_inst_info.dynamic_nest_host(), THREAD);
5322 }
5323
5324 // note that is not safe to use the fields in the parser from this point on
5325 assert(NULL == _cp, "invariant");
5326 assert(NULL == _fields, "invariant");
5327 assert(NULL == _methods, "invariant");
5328 assert(NULL == _inner_classes, "invariant");
5329 assert(NULL == _nest_members, "invariant");
5330 assert(NULL == _combined_annotations, "invariant");
5331 assert(NULL == _record_components, "invariant");
5332 assert(NULL == _permitted_subclasses, "invariant");
5333
5334 if (_has_final_method) {
5335 ik->set_has_final_method();
5336 }
5337
5338 ik->copy_method_ordering(_method_ordering, CHECK);
5339 // The InstanceKlass::_methods_jmethod_ids cache
5340 // is managed on the assumption that the initial cache
5341 // size is equal to the number of methods in the class. If
5342 // that changes, then InstanceKlass::idnum_can_increment()
5343 // has to be changed accordingly.
5344 ik->set_initial_method_idnum(ik->methods()->length());
5345
5346 ik->set_this_class_index(_this_class_index);
5347
5348 if (_is_hidden || is_unsafe_anonymous()) {
5349 // _this_class_index is a CONSTANT_Class entry that refers to this
5350 // hidden or anonymous class itself. If this class needs to refer to its own
5351 // methods or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5352 // _this_class_index. However, because this class is hidden or anonymous (it's
5353 // not stored in SystemDictionary), _this_class_index cannot be resolved
5354 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5355 // Therefore, we must eagerly resolve _this_class_index now.
5356 ik->constants()->klass_at_put(_this_class_index, ik);
5357 }
5358
5359 ik->set_minor_version(_minor_version);
5360 ik->set_major_version(_major_version);
5361 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5362 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5363
5364 if (_unsafe_anonymous_host != NULL) {
5365 assert (ik->is_unsafe_anonymous(), "should be the same");
5366 ik->set_unsafe_anonymous_host(_unsafe_anonymous_host);
5367 }
5368 if (_is_hidden) {
5369 ik->set_is_hidden();
5370 }
5371
5372 // Set PackageEntry for this_klass
5373 oop cl = ik->class_loader();
5374 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5375 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5376 ik->set_package(cld, NULL, CHECK);
5377
5378 const Array<Method*>* const methods = ik->methods();
5379 assert(methods != NULL, "invariant");
5380 const int methods_len = methods->length();
5381
5382 check_methods_for_intrinsics(ik, methods);
5383
5384 // Fill in field values obtained by parse_classfile_attributes
5385 if (_parsed_annotations->has_any_annotations()) {
5386 _parsed_annotations->apply_to(ik);
5387 }
5388
5389 apply_parsed_class_attributes(ik);
5390
5391 // Miranda methods
5392 if ((_num_miranda_methods > 0) ||
5393 // if this class introduced new miranda methods or
5394 (_super_klass != NULL && _super_klass->has_miranda_methods())
5395 // super class exists and this class inherited miranda methods
5396 ) {
5397 ik->set_has_miranda_methods(); // then set a flag
5398 }
5399
5400 // Fill in information needed to compute superclasses.
5401 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5402 ik->set_transitive_interfaces(_transitive_interfaces);
5403 ik->set_local_interfaces(_local_interfaces);
5404 _transitive_interfaces = NULL;
5405 _local_interfaces = NULL;
5406
5407 // Initialize itable offset tables
5408 klassItable::setup_itable_offset_table(ik);
5409
5410 // Compute transitive closure of interfaces this class implements
5411 // Do final class setup
5412 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5413 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5414 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5415 }
5416
5417 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5418 ( _super_klass != NULL && _super_klass->has_contended_annotations())) {
5419 ik->set_has_contended_annotations(true);
5420 }
5421
5422 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5423 set_precomputed_flags(ik);
5424
5425 // check if this class can access its super class
5426 check_super_class_access(ik, CHECK);
5427
5428 // check if this class can access its superinterfaces
5429 check_super_interface_access(ik, CHECK);
5430
5431 // check if this class overrides any final method
5432 check_final_method_override(ik, CHECK);
5433
5434 // reject static interface methods prior to Java 8
5435 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5436 check_illegal_static_method(ik, CHECK);
5437 }
5438
5439 // Obtain this_klass' module entry
5440 ModuleEntry* module_entry = ik->module();
5441 assert(module_entry != NULL, "module_entry should always be set");
5442
5443 // Obtain java.lang.Module
5444 Handle module_handle(THREAD, module_entry->module());
5445
5446 // Allocate mirror and initialize static fields
5447 // The create_mirror() call will also call compute_modifiers()
5448 java_lang_Class::create_mirror(ik,
5449 Handle(THREAD, _loader_data->class_loader()),
5450 module_handle,
5451 _protection_domain,
5452 cl_inst_info.class_data(),
5453 CHECK);
5454
5455 assert(_all_mirandas != NULL, "invariant");
5456
5457 // Generate any default methods - default methods are public interface methods
5458 // that have a default implementation. This is new with Java 8.
5459 if (_has_nonstatic_concrete_methods) {
5460 DefaultMethods::generate_default_methods(ik,
5461 _all_mirandas,
5462 CHECK);
5463 }
5464
5465 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5466 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5467 !module_entry->has_default_read_edges()) {
5468 if (!module_entry->set_has_default_read_edges()) {
5469 // We won a potential race
5470 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5471 }
5472 }
5473
5474 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5475
5476 if (!is_internal()) {
5477 if (log_is_enabled(Info, class, load)) {
5478 ResourceMark rm;
5479 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5480 ik->print_class_load_logging(_loader_data, module_name, _stream);
5481 }
5482
5483 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5484 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5485 log_is_enabled(Info, class, preview)) {
5486 ResourceMark rm;
5487 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5488 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5489 }
5490
5491 if (log_is_enabled(Debug, class, resolve)) {
5492 ResourceMark rm;
5493 // print out the superclass.
5494 const char * from = ik->external_name();
5495 if (ik->java_super() != NULL) {
5496 log_debug(class, resolve)("%s %s (super)",
5497 from,
5498 ik->java_super()->external_name());
5499 }
5500 // print out each of the interface classes referred to by this class.
5501 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5502 if (local_interfaces != NULL) {
5503 const int length = local_interfaces->length();
5504 for (int i = 0; i < length; i++) {
5505 const InstanceKlass* const k = local_interfaces->at(i);
5506 const char * to = k->external_name();
5507 log_debug(class, resolve)("%s %s (interface)", from, to);
5508 }
5509 }
5510 }
5511 }
5512
5513 JFR_ONLY(INIT_ID(ik);)
5514
5515 // If we reach here, all is well.
5516 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5517 // in order for it to not be destroyed in the ClassFileParser destructor.
5518 set_klass_to_deallocate(NULL);
5519
5520 // it's official
5521 set_klass(ik);
5522
5523 debug_only(ik->verify();)
5524 }
5525
5526 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5527 // Decrement the refcount in the old name, since we're clobbering it.
5528 _class_name->decrement_refcount();
5529
5530 _class_name = new_class_name;
5531 // Increment the refcount of the new name.
5532 // Now the ClassFileParser owns this name and will decrement in
5533 // the destructor.
5534 _class_name->increment_refcount();
5535 }
5536
5537 // For an unsafe anonymous class that is in the unnamed package, move it to its host class's
5538 // package by prepending its host class's package name to its class name and setting
5539 // its _class_name field.
5540 void ClassFileParser::prepend_host_package_name(const InstanceKlass* unsafe_anonymous_host, TRAPS) {
5541 ResourceMark rm(THREAD);
5542 assert(strrchr(_class_name->as_C_string(), JVM_SIGNATURE_SLASH) == NULL,
5543 "Unsafe anonymous class should not be in a package");
5544 TempNewSymbol host_pkg_name =
5545 ClassLoader::package_from_class_name(unsafe_anonymous_host->name());
5546
5547 if (host_pkg_name != NULL) {
5548 int host_pkg_len = host_pkg_name->utf8_length();
5549 int class_name_len = _class_name->utf8_length();
5550 int symbol_len = host_pkg_len + 1 + class_name_len;
5551 char* new_anon_name = NEW_RESOURCE_ARRAY(char, symbol_len + 1);
5552 int n = os::snprintf(new_anon_name, symbol_len + 1, "%.*s/%.*s",
5553 host_pkg_len, host_pkg_name->base(), class_name_len, _class_name->base());
5554 assert(n == symbol_len, "Unexpected number of characters in string");
5555
5556 // Decrement old _class_name to avoid leaking.
5557 _class_name->decrement_refcount();
5558
5559 // Create a symbol and update the anonymous class name.
5560 // The new class name is created with a refcount of one. When installed into the InstanceKlass,
5561 // it'll be two and when the ClassFileParser destructor runs, it'll go back to one and get deleted
5562 // when the class is unloaded.
5563 _class_name = SymbolTable::new_symbol(new_anon_name, symbol_len);
5564 }
5565 }
5566
5567 // If the host class and the anonymous class are in the same package then do
5568 // nothing. If the anonymous class is in the unnamed package then move it to its
5569 // host's package. If the classes are in different packages then throw an IAE
5570 // exception.
5571 void ClassFileParser::fix_unsafe_anonymous_class_name(TRAPS) {
5572 assert(_unsafe_anonymous_host != NULL, "Expected an unsafe anonymous class");
5573
5574 const jbyte* anon_last_slash = UTF8::strrchr((const jbyte*)_class_name->base(),
5575 _class_name->utf8_length(), JVM_SIGNATURE_SLASH);
5576 if (anon_last_slash == NULL) { // Unnamed package
5577 prepend_host_package_name(_unsafe_anonymous_host, CHECK);
5578 } else {
5579 if (!_unsafe_anonymous_host->is_same_class_package(_unsafe_anonymous_host->class_loader(), _class_name)) {
5580 ResourceMark rm(THREAD);
5581 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5582 err_msg("Host class %s and anonymous class %s are in different packages",
5583 _unsafe_anonymous_host->name()->as_C_string(), _class_name->as_C_string()));
5584 }
5585 }
5586 }
5587
5588 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5589 bool trusted = loader_data->is_boot_class_loader_data() ||
5590 loader_data->is_platform_class_loader_data();
5591 bool need_verify =
5592 // verifyAll
5593 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5594 // verifyRemote
5595 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5596 return !need_verify;
5597 }
5598
5599 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5600 Symbol* name,
5601 ClassLoaderData* loader_data,
5602 const ClassLoadInfo* cl_info,
5603 Publicity pub_level,
5604 TRAPS) :
5605 _stream(stream),
5606 _class_name(NULL),
5607 _loader_data(loader_data),
5608 _unsafe_anonymous_host(cl_info->unsafe_anonymous_host()),
5609 _cp_patches(cl_info->cp_patches()),
5610 _is_hidden(cl_info->is_hidden()),
5611 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5612 _num_patched_klasses(0),
5613 _max_num_patched_klasses(0),
5614 _orig_cp_size(0),
5615 _first_patched_klass_resolved_index(0),
5616 _super_klass(),
5617 _cp(NULL),
5618 _fields(NULL),
5619 _methods(NULL),
5620 _inner_classes(NULL),
5621 _nest_members(NULL),
5622 _nest_host(0),
5623 _permitted_subclasses(NULL),
5624 _record_components(NULL),
5625 _local_interfaces(NULL),
5626 _transitive_interfaces(NULL),
5627 _combined_annotations(NULL),
5628 _class_annotations(NULL),
5629 _class_type_annotations(NULL),
5630 _fields_annotations(NULL),
5631 _fields_type_annotations(NULL),
5632 _klass(NULL),
5633 _klass_to_deallocate(NULL),
5634 _parsed_annotations(NULL),
5635 _fac(NULL),
5636 _field_info(NULL),
5637 _method_ordering(NULL),
5638 _all_mirandas(NULL),
5639 _vtable_size(0),
5640 _itable_size(0),
5641 _num_miranda_methods(0),
5642 _rt(REF_NONE),
5643 _protection_domain(cl_info->protection_domain()),
5644 _access_flags(),
5645 _pub_level(pub_level),
5646 _bad_constant_seen(0),
5647 _synthetic_flag(false),
5648 _sde_length(false),
5649 _sde_buffer(NULL),
5650 _sourcefile_index(0),
5651 _generic_signature_index(0),
5652 _major_version(0),
5653 _minor_version(0),
5654 _this_class_index(0),
5655 _super_class_index(0),
5656 _itfs_len(0),
5657 _java_fields_count(0),
5658 _need_verify(false),
5659 _relax_verify(false),
5660 _has_nonstatic_concrete_methods(false),
5661 _declares_nonstatic_concrete_methods(false),
5662 _has_final_method(false),
5663 _has_contended_fields(false),
5664 _has_finalizer(false),
5665 _has_empty_finalizer(false),
5666 _has_vanilla_constructor(false),
5667 _max_bootstrap_specifier_index(-1) {
5668
5669 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5670 _class_name->increment_refcount();
5671
5672 assert(THREAD->is_Java_thread(), "invariant");
5673 assert(_loader_data != NULL, "invariant");
5674 assert(stream != NULL, "invariant");
5675 assert(_stream != NULL, "invariant");
5676 assert(_stream->buffer() == _stream->current(), "invariant");
5677 assert(_class_name != NULL, "invariant");
5678 assert(0 == _access_flags.as_int(), "invariant");
5679
5680 // Figure out whether we can skip format checking (matching classic VM behavior)
5681 if (DumpSharedSpaces) {
5682 // verify == true means it's a 'remote' class (i.e., non-boot class)
5683 // Verification decision is based on BytecodeVerificationRemote flag
5684 // for those classes.
5685 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5686 BytecodeVerificationLocal;
5687 }
5688 else {
5689 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5690 stream->need_verify());
5691 }
5692 if (_cp_patches != NULL) {
5693 int len = _cp_patches->length();
5694 for (int i=0; i<len; i++) {
5695 if (has_cp_patch_at(i)) {
5696 Handle patch = cp_patch_at(i);
5697 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5698 // We need to append the names of the patched classes to the end of the constant pool,
5699 // because a patched class may have a Utf8 name that's not already included in the
5700 // original constant pool. These class names are used when patch_constant_pool()
5701 // calls patch_class().
5702 //
5703 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5704 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5705 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5706 _max_num_patched_klasses++;
5707 }
5708 }
5709 }
5710 }
5711
5712 // synch back verification state to stream
5713 stream->set_verify(_need_verify);
5714
5715 // Check if verification needs to be relaxed for this class file
5716 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5717 _relax_verify = relax_format_check_for(_loader_data);
5718
5719 parse_stream(stream, CHECK);
5720
5721 post_process_parsed_stream(stream, _cp, CHECK);
5722 }
5723
5724 void ClassFileParser::clear_class_metadata() {
5725 // metadata created before the instance klass is created. Must be
5726 // deallocated if classfile parsing returns an error.
5727 _cp = NULL;
5728 _fields = NULL;
5729 _methods = NULL;
5730 _inner_classes = NULL;
5731 _nest_members = NULL;
5732 _permitted_subclasses = NULL;
5733 _combined_annotations = NULL;
5734 _class_annotations = _class_type_annotations = NULL;
5735 _fields_annotations = _fields_type_annotations = NULL;
5736 _record_components = NULL;
5737 }
5738
5739 // Destructor to clean up
5740 ClassFileParser::~ClassFileParser() {
5741 _class_name->decrement_refcount();
5742
5743 if (_cp != NULL) {
5744 MetadataFactory::free_metadata(_loader_data, _cp);
5745 }
5746 if (_fields != NULL) {
5747 MetadataFactory::free_array<u2>(_loader_data, _fields);
5748 }
5749
5750 if (_methods != NULL) {
5751 // Free methods
5752 InstanceKlass::deallocate_methods(_loader_data, _methods);
5753 }
5754
5755 // beware of the Universe::empty_blah_array!!
5756 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5757 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5758 }
5759
5760 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
5761 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5762 }
5763
5764 if (_record_components != NULL) {
5765 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
5766 }
5767
5768 if (_permitted_subclasses != NULL && _permitted_subclasses != Universe::the_empty_short_array()) {
5769 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
5770 }
5771
5772 // Free interfaces
5773 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5774 _local_interfaces, _transitive_interfaces);
5775
5776 if (_combined_annotations != NULL) {
5777 // After all annotations arrays have been created, they are installed into the
5778 // Annotations object that will be assigned to the InstanceKlass being created.
5779
5780 // Deallocate the Annotations object and the installed annotations arrays.
5781 _combined_annotations->deallocate_contents(_loader_data);
5782
5783 // If the _combined_annotations pointer is non-NULL,
5784 // then the other annotations fields should have been cleared.
5785 assert(_class_annotations == NULL, "Should have been cleared");
5786 assert(_class_type_annotations == NULL, "Should have been cleared");
5787 assert(_fields_annotations == NULL, "Should have been cleared");
5788 assert(_fields_type_annotations == NULL, "Should have been cleared");
5789 } else {
5790 // If the annotations arrays were not installed into the Annotations object,
5791 // then they have to be deallocated explicitly.
5792 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
5793 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
5794 Annotations::free_contents(_loader_data, _fields_annotations);
5795 Annotations::free_contents(_loader_data, _fields_type_annotations);
5796 }
5797
5798 clear_class_metadata();
5799 _transitive_interfaces = NULL;
5800 _local_interfaces = NULL;
5801
5802 // deallocate the klass if already created. Don't directly deallocate, but add
5803 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5804 // at a safepoint.
5805 if (_klass_to_deallocate != NULL) {
5806 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5807 }
5808 }
5809
5810 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5811 TRAPS) {
5812
5813 assert(stream != NULL, "invariant");
5814 assert(_class_name != NULL, "invariant");
5815
5816 // BEGIN STREAM PARSING
5817 stream->guarantee_more(8, CHECK); // magic, major, minor
5818 // Magic value
5819 const u4 magic = stream->get_u4_fast();
5820 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5821 "Incompatible magic value %u in class file %s",
5822 magic, CHECK);
5823
5824 // Version numbers
5825 _minor_version = stream->get_u2_fast();
5826 _major_version = stream->get_u2_fast();
5827
5828 if (DumpSharedSpaces && _major_version < JAVA_6_VERSION) {
5829 ResourceMark rm;
5830 warning("Pre JDK 6 class not supported by CDS: %u.%u %s",
5831 _major_version, _minor_version, _class_name->as_C_string());
5832 Exceptions::fthrow(
5833 THREAD_AND_LOCATION,
5834 vmSymbols::java_lang_UnsupportedClassVersionError(),
5835 "Unsupported major.minor version for dump time %u.%u",
5836 _major_version,
5837 _minor_version);
5838 }
5839
5840 // Check version numbers - we check this even with verifier off
5841 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
5842
5843 stream->guarantee_more(3, CHECK); // length, first cp tag
5844 u2 cp_size = stream->get_u2_fast();
5845
5846 guarantee_property(
5847 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5848 cp_size, CHECK);
5849
5850 _orig_cp_size = cp_size;
5851 if (is_hidden()) { // Add a slot for hidden class name.
5852 assert(_max_num_patched_klasses == 0, "Sanity check");
5853 cp_size++;
5854 } else {
5855 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
5856 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
5857 }
5858 cp_size += _max_num_patched_klasses;
5859 }
5860
5861 _cp = ConstantPool::allocate(_loader_data,
5862 cp_size,
5863 CHECK);
5864
5865 ConstantPool* const cp = _cp;
5866
5867 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
5868
5869 assert(cp_size == (const u2)cp->length(), "invariant");
5870
5871 // ACCESS FLAGS
5872 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5873
5874 // Access flags
5875 jint flags;
5876 // JVM_ACC_MODULE is defined in JDK-9 and later.
5877 if (_major_version >= JAVA_9_VERSION) {
5878 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5879 } else {
5880 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5881 }
5882
5883 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5884 // Set abstract bit for old class files for backward compatibility
5885 flags |= JVM_ACC_ABSTRACT;
5886 }
5887
5888 verify_legal_class_modifiers(flags, CHECK);
5889
5890 short bad_constant = class_bad_constant_seen();
5891 if (bad_constant != 0) {
5892 // Do not throw CFE until after the access_flags are checked because if
5893 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5894 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
5895 }
5896
5897 _access_flags.set_flags(flags);
5898
5899 // This class and superclass
5900 _this_class_index = stream->get_u2_fast();
5901 check_property(
5902 valid_cp_range(_this_class_index, cp_size) &&
5903 cp->tag_at(_this_class_index).is_unresolved_klass(),
5904 "Invalid this class index %u in constant pool in class file %s",
5905 _this_class_index, CHECK);
5906
5907 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5908 assert(class_name_in_cp != NULL, "class_name can't be null");
5909
5910 // Don't need to check whether this class name is legal or not.
5911 // It has been checked when constant pool is parsed.
5912 // However, make sure it is not an array type.
5913 if (_need_verify) {
5914 guarantee_property(class_name_in_cp->char_at(0) != JVM_SIGNATURE_ARRAY,
5915 "Bad class name in class file %s",
5916 CHECK);
5917 }
5918
5919 #ifdef ASSERT
5920 // Basic sanity checks
5921 assert(!(_is_hidden && (_unsafe_anonymous_host != NULL)), "mutually exclusive variants");
5922
5923 if (_unsafe_anonymous_host != NULL) {
5924 assert(_class_name == vmSymbols::unknown_class_name(), "A named anonymous class???");
5925 }
5926 if (_is_hidden) {
5927 assert(_class_name != vmSymbols::unknown_class_name(), "hidden classes should have a special name");
5928 }
5929 #endif
5930
5931 // Update the _class_name as needed depending on whether this is a named,
5932 // un-named, hidden or unsafe-anonymous class.
5933
5934 if (_is_hidden) {
5935 assert(_class_name != NULL, "Unexpected null _class_name");
5936 #ifdef ASSERT
5937 if (_need_verify) {
5938 verify_legal_class_name(_class_name, CHECK);
5939 }
5940 #endif
5941
5942 // NOTE: !_is_hidden does not imply "findable" as it could be an old-style
5943 // "hidden" unsafe-anonymous class
5944
5945 // If this is an anonymous class fix up its name if it is in the unnamed
5946 // package. Otherwise, throw IAE if it is in a different package than
5947 // its host class.
5948 } else if (_unsafe_anonymous_host != NULL) {
5949 update_class_name(class_name_in_cp);
5950 fix_unsafe_anonymous_class_name(CHECK);
5951
5952 } else {
5953 // Check if name in class file matches given name
5954 if (_class_name != class_name_in_cp) {
5955 if (_class_name != vmSymbols::unknown_class_name()) {
5956 ResourceMark rm(THREAD);
5957 Exceptions::fthrow(THREAD_AND_LOCATION,
5958 vmSymbols::java_lang_NoClassDefFoundError(),
5959 "%s (wrong name: %s)",
5960 class_name_in_cp->as_C_string(),
5961 _class_name->as_C_string()
5962 );
5963 return;
5964 } else {
5965 // The class name was not known by the caller so we set it from
5966 // the value in the CP.
5967 update_class_name(class_name_in_cp);
5968 }
5969 // else nothing to do: the expected class name matches what is in the CP
5970 }
5971 }
5972
5973 // Verification prevents us from creating names with dots in them, this
5974 // asserts that that's the case.
5975 assert(is_internal_format(_class_name), "external class name format used internally");
5976
5977 if (!is_internal()) {
5978 LogTarget(Debug, class, preorder) lt;
5979 if (lt.is_enabled()){
5980 ResourceMark rm(THREAD);
5981 LogStream ls(lt);
5982 ls.print("%s", _class_name->as_klass_external_name());
5983 if (stream->source() != NULL) {
5984 ls.print(" source: %s", stream->source());
5985 }
5986 ls.cr();
5987 }
5988
5989 #if INCLUDE_CDS
5990 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5991 if (!ClassLoader::has_jrt_entry()) {
5992 warning("DumpLoadedClassList and CDS are not supported in exploded build");
5993 DumpLoadedClassList = NULL;
5994 } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
5995 !_is_hidden &&
5996 _unsafe_anonymous_host == NULL) {
5997 // Only dump the classes that can be stored into CDS archive.
5998 // Hidden and unsafe anonymous classes such as generated LambdaForm classes are also not included.
5999 oop class_loader = _loader_data->class_loader();
6000 ResourceMark rm(THREAD);
6001 bool skip = false;
6002 if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6003 // For the boot and platform class loaders, skip classes that are not found in the
6004 // java runtime image, such as those found in the --patch-module entries.
6005 // These classes can't be loaded from the archive during runtime.
6006 if (!stream->from_boot_loader_modules_image() && strncmp(stream->source(), "jrt:", 4) != 0) {
6007 skip = true;
6008 }
6009
6010 if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6011 // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6012 // as they can be loaded from the archive during runtime.
6013 skip = false;
6014 }
6015 }
6016 if (skip) {
6017 tty->print_cr("skip writing class %s from source %s to classlist file",
6018 _class_name->as_C_string(), stream->source());
6019 } else {
6020 classlist_file->print_cr("%s", _class_name->as_C_string());
6021 classlist_file->flush();
6022 }
6023 }
6024 }
6025 #endif
6026 }
6027
6028 // SUPERKLASS
6029 _super_class_index = stream->get_u2_fast();
6030 _super_klass = parse_super_class(cp,
6031 _super_class_index,
6032 _need_verify,
6033 CHECK);
6034
6035 // Interfaces
6036 _itfs_len = stream->get_u2_fast();
6037 parse_interfaces(stream,
6038 _itfs_len,
6039 cp,
6040 &_has_nonstatic_concrete_methods,
6041 CHECK);
6042
6043 assert(_local_interfaces != NULL, "invariant");
6044
6045 // Fields (offsets are filled in later)
6046 _fac = new FieldAllocationCount();
6047 parse_fields(stream,
6048 _access_flags.is_interface(),
6049 _fac,
6050 cp,
6051 cp_size,
6052 &_java_fields_count,
6053 CHECK);
6054
6055 assert(_fields != NULL, "invariant");
6056
6057 // Methods
6058 AccessFlags promoted_flags;
6059 parse_methods(stream,
6060 _access_flags.is_interface(),
6061 &promoted_flags,
6062 &_has_final_method,
6063 &_declares_nonstatic_concrete_methods,
6064 CHECK);
6065
6066 assert(_methods != NULL, "invariant");
6067
6068 // promote flags from parse_methods() to the klass' flags
6069 _access_flags.add_promoted_flags(promoted_flags.as_int());
6070
6071 if (_declares_nonstatic_concrete_methods) {
6072 _has_nonstatic_concrete_methods = true;
6073 }
6074
6075 // Additional attributes/annotations
6076 _parsed_annotations = new ClassAnnotationCollector();
6077 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6078
6079 assert(_inner_classes != NULL, "invariant");
6080
6081 // Finalize the Annotations metadata object,
6082 // now that all annotation arrays have been created.
6083 create_combined_annotations(CHECK);
6084
6085 // Make sure this is the end of class file stream
6086 guarantee_property(stream->at_eos(),
6087 "Extra bytes at the end of class file %s",
6088 CHECK);
6089
6090 // all bytes in stream read and parsed
6091 }
6092
6093 void ClassFileParser::mangle_hidden_class_name(InstanceKlass* const ik) {
6094 ResourceMark rm;
6095 // Construct hidden name from _class_name, "+", and &ik. Note that we can't
6096 // use a '/' because that confuses finding the class's package. Also, can't
6097 // use an illegal char such as ';' because that causes serialization issues
6098 // and issues with hidden classes that create their own hidden classes.
6099 char addr_buf[20];
6100 jio_snprintf(addr_buf, 20, INTPTR_FORMAT, p2i(ik));
6101 size_t new_name_len = _class_name->utf8_length() + 2 + strlen(addr_buf);
6102 char* new_name = NEW_RESOURCE_ARRAY(char, new_name_len);
6103 jio_snprintf(new_name, new_name_len, "%s+%s",
6104 _class_name->as_C_string(), addr_buf);
6105 update_class_name(SymbolTable::new_symbol(new_name));
6106
6107 // Add a Utf8 entry containing the hidden name.
6108 assert(_class_name != NULL, "Unexpected null _class_name");
6109 int hidden_index = _orig_cp_size; // this is an extra slot we added
6110 _cp->symbol_at_put(hidden_index, _class_name);
6111
6112 // Update this_class_index's slot in the constant pool with the new Utf8 entry.
6113 // We have to update the resolved_klass_index and the name_index together
6114 // so extract the existing resolved_klass_index first.
6115 CPKlassSlot cp_klass_slot = _cp->klass_slot_at(_this_class_index);
6116 int resolved_klass_index = cp_klass_slot.resolved_klass_index();
6117 _cp->unresolved_klass_at_put(_this_class_index, hidden_index, resolved_klass_index);
6118 assert(_cp->klass_slot_at(_this_class_index).name_index() == _orig_cp_size,
6119 "Bad name_index");
6120 }
6121
6122 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6123 ConstantPool* cp,
6124 TRAPS) {
6125 assert(stream != NULL, "invariant");
6126 assert(stream->at_eos(), "invariant");
6127 assert(cp != NULL, "invariant");
6128 assert(_loader_data != NULL, "invariant");
6129
6130 if (_class_name == vmSymbols::java_lang_Object()) {
6131 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6132 "java.lang.Object cannot implement an interface in class file %s",
6133 CHECK);
6134 }
6135 // We check super class after class file is parsed and format is checked
6136 if (_super_class_index > 0 && NULL ==_super_klass) {
6137 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6138 if (_access_flags.is_interface()) {
6139 // Before attempting to resolve the superclass, check for class format
6140 // errors not checked yet.
6141 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6142 "Interfaces must have java.lang.Object as superclass in class file %s",
6143 CHECK);
6144 }
6145 Handle loader(THREAD, _loader_data->class_loader());
6146 _super_klass = (const InstanceKlass*)
6147 SystemDictionary::resolve_super_or_fail(_class_name,
6148 super_class_name,
6149 loader,
6150 _protection_domain,
6151 true,
6152 CHECK);
6153 }
6154
6155 if (_super_klass != NULL) {
6156 if (_super_klass->has_nonstatic_concrete_methods()) {
6157 _has_nonstatic_concrete_methods = true;
6158 }
6159
6160 if (_super_klass->is_interface()) {
6161 ResourceMark rm(THREAD);
6162 Exceptions::fthrow(
6163 THREAD_AND_LOCATION,
6164 vmSymbols::java_lang_IncompatibleClassChangeError(),
6165 "class %s has interface %s as super class",
6166 _class_name->as_klass_external_name(),
6167 _super_klass->external_name()
6168 );
6169 return;
6170 }
6171 }
6172
6173 // Compute the transitive list of all unique interfaces implemented by this class
6174 _transitive_interfaces =
6175 compute_transitive_interfaces(_super_klass,
6176 _local_interfaces,
6177 _loader_data,
6178 CHECK);
6179
6180 assert(_transitive_interfaces != NULL, "invariant");
6181
6182 // sort methods
6183 _method_ordering = sort_methods(_methods);
6184
6185 _all_mirandas = new GrowableArray<Method*>(20);
6186
6187 Handle loader(THREAD, _loader_data->class_loader());
6188 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6189 &_num_miranda_methods,
6190 _all_mirandas,
6191 _super_klass,
6192 _methods,
6193 _access_flags,
6194 _major_version,
6195 loader,
6196 _class_name,
6197 _local_interfaces,
6198 CHECK);
6199
6200 // Size of Java itable (in words)
6201 _itable_size = _access_flags.is_interface() ? 0 :
6202 klassItable::compute_itable_size(_transitive_interfaces);
6203
6204 assert(_fac != NULL, "invariant");
6205 assert(_parsed_annotations != NULL, "invariant");
6206
6207 _field_info = new FieldLayoutInfo();
6208 FieldLayoutBuilder lb(class_name(), super_klass(), _cp, _fields,
6209 _parsed_annotations->is_contended(), _field_info);
6210 lb.build_layout();
6211
6212 // Compute reference typ
6213 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6214
6215 }
6216
6217 void ClassFileParser::set_klass(InstanceKlass* klass) {
6218
6219 #ifdef ASSERT
6220 if (klass != NULL) {
6221 assert(NULL == _klass, "leaking?");
6222 }
6223 #endif
6224
6225 _klass = klass;
6226 }
6227
6228 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6229
6230 #ifdef ASSERT
6231 if (klass != NULL) {
6232 assert(NULL == _klass_to_deallocate, "leaking?");
6233 }
6234 #endif
6235
6236 _klass_to_deallocate = klass;
6237 }
6238
6239 // Caller responsible for ResourceMark
6240 // clone stream with rewound position
6241 const ClassFileStream* ClassFileParser::clone_stream() const {
6242 assert(_stream != NULL, "invariant");
6243
6244 return _stream->clone();
6245 }
6246 // ----------------------------------------------------------------------------
6247 // debugging
6248
6249 #ifdef ASSERT
6250
6251 // return true if class_name contains no '.' (internal format is '/')
6252 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6253 if (class_name != NULL) {
6254 ResourceMark rm;
6255 char* name = class_name->as_C_string();
6256 return strchr(name, JVM_SIGNATURE_DOT) == NULL;
6257 } else {
6258 return true;
6259 }
6260 }
6261
6262 #endif