1 /*
2 * Copyright (c) 1997, 2017, 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/javaClasses.inline.hpp"
34 #include "classfile/moduleEntry.hpp"
35 #include "classfile/symbolTable.hpp"
36 #include "classfile/systemDictionary.hpp"
37 #include "classfile/verificationType.hpp"
38 #include "classfile/verifier.hpp"
39 #include "classfile/vmSymbols.hpp"
40 #include "gc/shared/gcLocker.hpp"
41 #include "logging/log.hpp"
42 #include "logging/logStream.hpp"
43 #include "memory/allocation.hpp"
44 #include "memory/metadataFactory.hpp"
45 #include "memory/oopFactory.hpp"
46 #include "memory/resourceArea.hpp"
47 #include "memory/universe.inline.hpp"
48 #include "oops/annotations.hpp"
49 #include "oops/fieldStreams.hpp"
50 #include "oops/instanceKlass.hpp"
51 #include "oops/instanceMirrorKlass.hpp"
52 #include "oops/klass.inline.hpp"
53 #include "oops/klassVtable.hpp"
54 #include "oops/metadata.hpp"
55 #include "oops/method.hpp"
56 #include "oops/oop.inline.hpp"
57 #include "oops/symbol.hpp"
58 #include "oops/valueKlass.hpp"
59 #include "prims/jvmtiExport.hpp"
60 #include "prims/jvmtiThreadState.hpp"
61 #include "runtime/javaCalls.hpp"
62 #include "runtime/perfData.hpp"
63 #include "runtime/reflection.hpp"
64 #include "runtime/signature.hpp"
65 #include "runtime/timer.hpp"
66 #include "services/classLoadingService.hpp"
67 #include "services/threadService.hpp"
68 #include "trace/traceMacros.hpp"
69 #include "utilities/align.hpp"
70 #include "utilities/bitMap.inline.hpp"
71 #include "utilities/exceptions.hpp"
72 #include "utilities/globalDefinitions.hpp"
73 #include "utilities/growableArray.hpp"
74 #include "utilities/macros.hpp"
75 #include "utilities/ostream.hpp"
76 #include "utilities/resourceHash.hpp"
77 #if INCLUDE_CDS
78 #include "classfile/systemDictionaryShared.hpp"
79 #endif
80
81 // We generally try to create the oops directly when parsing, rather than
82 // allocating temporary data structures and copying the bytes twice. A
83 // temporary area is only needed when parsing utf8 entries in the constant
84 // pool and when parsing line number tables.
85
86 // We add assert in debug mode when class format is not checked.
87
88 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
89 #define JAVA_MIN_SUPPORTED_VERSION 45
90 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 1
91
92 // Used for two backward compatibility reasons:
93 // - to check for new additions to the class file format in JDK1.5
94 // - to check for bug fixes in the format checker in JDK1.5
95 #define JAVA_1_5_VERSION 49
96
97 // Used for backward compatibility reasons:
98 // - to check for javac bug fixes that happened after 1.5
99 // - also used as the max version when running in jdk6
100 #define JAVA_6_VERSION 50
101
102 // Used for backward compatibility reasons:
103 // - to disallow argument and require ACC_STATIC for <clinit> methods
104 #define JAVA_7_VERSION 51
105
106 // Extension method support.
107 #define JAVA_8_VERSION 52
108
109 #define JAVA_9_VERSION 53
110
111 #define JAVA_10_VERSION 54
112
113 #define JAVA_11_VERSION 55
114
115 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
116 assert((bad_constant == 19 || bad_constant == 20) && _major_version >= JAVA_9_VERSION,
117 "Unexpected bad constant pool entry");
118 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
119 }
120
121 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
122 ConstantPool* cp,
123 const int length,
124 TRAPS) {
125 assert(stream != NULL, "invariant");
126 assert(cp != NULL, "invariant");
127
128 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
129 // this function (_current can be allocated in a register, with scalar
130 // replacement of aggregates). The _current pointer is copied back to
131 // stream() when this function returns. DON'T call another method within
132 // this method that uses stream().
133 const ClassFileStream cfs1 = *stream;
134 const ClassFileStream* const cfs = &cfs1;
135
136 assert(cfs->allocated_on_stack(), "should be local");
137 debug_only(const u1* const old_current = stream->current();)
138
139 // Used for batching symbol allocations.
140 const char* names[SymbolTable::symbol_alloc_batch_size];
141 int lengths[SymbolTable::symbol_alloc_batch_size];
142 int indices[SymbolTable::symbol_alloc_batch_size];
143 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
144 int names_count = 0;
145
146 // parsing Index 0 is unused
147 for (int index = 1; index < length; index++) {
148 // Each of the following case guarantees one more byte in the stream
149 // for the following tag or the access_flags following constant pool,
150 // so we don't need bounds-check for reading tag.
151 const u1 tag = cfs->get_u1_fast();
152 switch (tag) {
153 case JVM_CONSTANT_Class: {
154 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
155 const u2 name_index = cfs->get_u2_fast();
156 cp->klass_index_at_put(index, name_index);
157 break;
158 }
159 case JVM_CONSTANT_Value: { // may be present in a retransform situation
160 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
161 const u2 name_index = cfs->get_u2_fast();
162 cp->value_type_index_at_put(index, name_index);
163 break;
164 }
165 case JVM_CONSTANT_Fieldref: {
166 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
167 const u2 class_index = cfs->get_u2_fast();
168 const u2 name_and_type_index = cfs->get_u2_fast();
169 cp->field_at_put(index, class_index, name_and_type_index);
170 break;
171 }
172 case JVM_CONSTANT_Methodref: {
173 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
174 const u2 class_index = cfs->get_u2_fast();
175 const u2 name_and_type_index = cfs->get_u2_fast();
176 cp->method_at_put(index, class_index, name_and_type_index);
177 break;
178 }
179 case JVM_CONSTANT_InterfaceMethodref: {
180 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
181 const u2 class_index = cfs->get_u2_fast();
182 const u2 name_and_type_index = cfs->get_u2_fast();
183 cp->interface_method_at_put(index, class_index, name_and_type_index);
184 break;
185 }
186 case JVM_CONSTANT_String : {
187 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
188 const u2 string_index = cfs->get_u2_fast();
189 cp->string_index_at_put(index, string_index);
190 break;
191 }
192 case JVM_CONSTANT_MethodHandle :
193 case JVM_CONSTANT_MethodType: {
194 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
195 classfile_parse_error(
196 "Class file version does not support constant tag %u in class file %s",
197 tag, CHECK);
198 }
199 if (tag == JVM_CONSTANT_MethodHandle) {
200 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
201 const u1 ref_kind = cfs->get_u1_fast();
202 const u2 method_index = cfs->get_u2_fast();
203 cp->method_handle_index_at_put(index, ref_kind, method_index);
204 }
205 else if (tag == JVM_CONSTANT_MethodType) {
206 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
207 const u2 signature_index = cfs->get_u2_fast();
208 cp->method_type_index_at_put(index, signature_index);
209 }
210 else {
211 ShouldNotReachHere();
212 }
213 break;
214 }
215 case JVM_CONSTANT_Dynamic : {
216 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
217 classfile_parse_error(
218 "Class file version does not support constant tag %u in class file %s",
219 tag, CHECK);
220 }
221 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
222 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
223 const u2 name_and_type_index = cfs->get_u2_fast();
224 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
225 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
226 }
227 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
228 break;
229 }
230 case JVM_CONSTANT_InvokeDynamic : {
231 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
232 classfile_parse_error(
233 "Class file version does not support constant tag %u in class file %s",
234 tag, CHECK);
235 }
236 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
237 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
238 const u2 name_and_type_index = cfs->get_u2_fast();
239 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
240 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
241 }
242 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
243 break;
244 }
245 case JVM_CONSTANT_Integer: {
246 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
247 const u4 bytes = cfs->get_u4_fast();
248 cp->int_at_put(index, (jint)bytes);
249 break;
250 }
251 case JVM_CONSTANT_Float: {
252 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
253 const u4 bytes = cfs->get_u4_fast();
254 cp->float_at_put(index, *(jfloat*)&bytes);
255 break;
256 }
257 case JVM_CONSTANT_Long: {
258 // A mangled type might cause you to overrun allocated memory
259 guarantee_property(index + 1 < length,
260 "Invalid constant pool entry %u in class file %s",
261 index,
262 CHECK);
263 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
264 const u8 bytes = cfs->get_u8_fast();
265 cp->long_at_put(index, bytes);
266 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
267 break;
268 }
269 case JVM_CONSTANT_Double: {
270 // A mangled type might cause you to overrun allocated memory
271 guarantee_property(index+1 < length,
272 "Invalid constant pool entry %u in class file %s",
273 index,
274 CHECK);
275 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
276 const u8 bytes = cfs->get_u8_fast();
277 cp->double_at_put(index, *(jdouble*)&bytes);
278 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
279 break;
280 }
281 case JVM_CONSTANT_NameAndType: {
282 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
283 const u2 name_index = cfs->get_u2_fast();
284 const u2 signature_index = cfs->get_u2_fast();
285 cp->name_and_type_at_put(index, name_index, signature_index);
286 break;
287 }
288 case JVM_CONSTANT_Utf8 : {
289 cfs->guarantee_more(2, CHECK); // utf8_length
290 u2 utf8_length = cfs->get_u2_fast();
291 const u1* utf8_buffer = cfs->current();
292 assert(utf8_buffer != NULL, "null utf8 buffer");
293 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
294 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
295 cfs->skip_u1_fast(utf8_length);
296
297 // Before storing the symbol, make sure it's legal
298 if (_need_verify) {
299 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
300 }
301
302 if (has_cp_patch_at(index)) {
303 Handle patch = clear_cp_patch_at(index);
304 guarantee_property(java_lang_String::is_instance(patch()),
305 "Illegal utf8 patch at %d in class file %s",
306 index,
307 CHECK);
308 const char* const str = java_lang_String::as_utf8_string(patch());
309 // (could use java_lang_String::as_symbol instead, but might as well batch them)
310 utf8_buffer = (const u1*) str;
311 utf8_length = (int) strlen(str);
312 }
313
314 unsigned int hash;
315 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
316 utf8_length,
317 hash);
318 if (result == NULL) {
319 names[names_count] = (const char*)utf8_buffer;
320 lengths[names_count] = utf8_length;
321 indices[names_count] = index;
322 hashValues[names_count++] = hash;
323 if (names_count == SymbolTable::symbol_alloc_batch_size) {
324 SymbolTable::new_symbols(_loader_data,
325 cp,
326 names_count,
327 names,
328 lengths,
329 indices,
330 hashValues,
331 CHECK);
332 names_count = 0;
333 }
334 } else {
335 cp->symbol_at_put(index, result);
336 }
337 break;
338 }
339 case 19:
340 case 20: {
341 // Record that an error occurred in these two cases but keep parsing so
342 // that ACC_Module can be checked for in the access_flags. Need to
343 // throw NoClassDefFoundError in that case.
344 if (_major_version >= JAVA_9_VERSION) {
345 cfs->guarantee_more(3, CHECK);
346 cfs->get_u2_fast();
347 set_class_bad_constant_seen(tag);
348 break;
349 }
350 }
351 default: {
352 classfile_parse_error("Unknown constant tag %u in class file %s",
353 tag,
354 CHECK);
355 break;
356 }
357 } // end of switch(tag)
358 } // end of for
359
360 // Allocate the remaining symbols
361 if (names_count > 0) {
362 SymbolTable::new_symbols(_loader_data,
363 cp,
364 names_count,
365 names,
366 lengths,
367 indices,
368 hashValues,
369 CHECK);
370 }
371
372 // Copy _current pointer of local copy back to stream.
373 assert(stream->current() == old_current, "non-exclusive use of stream");
374 stream->set_current(cfs1.current());
375
376 }
377
378 static inline bool valid_cp_range(int index, int length) {
379 return (index > 0 && index < length);
380 }
381
382 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
383 assert(cp != NULL, "invariant");
384 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
385 return cp->symbol_at(index);
386 }
387 return NULL;
388 }
389
390 #ifdef ASSERT
391 PRAGMA_DIAG_PUSH
392 PRAGMA_FORMAT_NONLITERAL_IGNORED
393 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
394 ResourceMark rm(THREAD);
395 fatal(msg, _class_name->as_C_string());
396 }
397
398 void ClassFileParser::report_assert_property_failure(const char* msg,
399 int index,
400 TRAPS) const {
401 ResourceMark rm(THREAD);
402 fatal(msg, index, _class_name->as_C_string());
403 }
404 PRAGMA_DIAG_POP
405 #endif
406
407 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
408 ConstantPool* const cp,
409 const int length,
410 TRAPS) {
411 assert(cp != NULL, "invariant");
412 assert(stream != NULL, "invariant");
413
414 // parsing constant pool entries
415 parse_constant_pool_entries(stream, cp, length, CHECK);
416 if (class_bad_constant_seen() != 0) {
417 // a bad CP entry has been detected previously so stop parsing and just return.
418 return;
419 }
420
421 int index = 1; // declared outside of loops for portability
422 int num_klasses = 0;
423
424 // first verification pass - validate cross references
425 // and fixup class and string constants
426 for (index = 1; index < length; index++) { // Index 0 is unused
427 const jbyte tag = cp->tag_at(index).value();
428 switch (tag) {
429 case JVM_CONSTANT_Class:
430 case JVM_CONSTANT_Value: {
431 ShouldNotReachHere(); // Only JVM_CONSTANT_[Class|Value]Index should be present
432 break;
433 }
434 case JVM_CONSTANT_Fieldref:
435 // fall through
436 case JVM_CONSTANT_Methodref:
437 // fall through
438 case JVM_CONSTANT_InterfaceMethodref: {
439 if (!_need_verify) break;
440 const int klass_ref_index = cp->klass_ref_index_at(index);
441 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
442 check_property(valid_klass_reference_at(klass_ref_index) ||
443 (valid_value_type_reference_at(klass_ref_index) &&
444 ((EnableMVT && (tag == JVM_CONSTANT_Fieldref)) ||
445 EnableValhalla)),
446 "Invalid constant pool index %u in class file %s",
447 klass_ref_index, CHECK);
448 check_property(valid_cp_range(name_and_type_ref_index, length) &&
449 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
450 "Invalid constant pool index %u in class file %s",
451 name_and_type_ref_index, CHECK);
452 break;
453 }
454 case JVM_CONSTANT_String: {
455 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
456 break;
457 }
458 case JVM_CONSTANT_Integer:
459 break;
460 case JVM_CONSTANT_Float:
461 break;
462 case JVM_CONSTANT_Long:
463 case JVM_CONSTANT_Double: {
464 index++;
465 check_property(
466 (index < length && cp->tag_at(index).is_invalid()),
467 "Improper constant pool long/double index %u in class file %s",
468 index, CHECK);
469 break;
470 }
471 case JVM_CONSTANT_NameAndType: {
472 if (!_need_verify) break;
473 const int name_ref_index = cp->name_ref_index_at(index);
474 const int signature_ref_index = cp->signature_ref_index_at(index);
475 check_property(valid_symbol_at(name_ref_index),
476 "Invalid constant pool index %u in class file %s",
477 name_ref_index, CHECK);
478 check_property(valid_symbol_at(signature_ref_index),
479 "Invalid constant pool index %u in class file %s",
480 signature_ref_index, CHECK);
481 break;
482 }
483 case JVM_CONSTANT_Utf8:
484 break;
485 case JVM_CONSTANT_UnresolvedClass: // fall-through
486 case JVM_CONSTANT_UnresolvedClassInError: {
487 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
488 break;
489 }
490 case JVM_CONSTANT_ClassIndex: {
491 const int class_index = cp->klass_index_at(index);
492 check_property(valid_symbol_at(class_index),
493 "Invalid constant pool index %u in class file %s",
494 class_index, CHECK);
495
496 Symbol* const name = cp->symbol_at(class_index);
497 const unsigned int name_len = name->utf8_length();
498
499 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
500 break;
501 }
502 case JVM_CONSTANT_ValueIndex: {
503 const int class_index = cp->value_type_index_at(index);
504 check_property(valid_symbol_at(class_index),
505 "Invalid constant pool index %u in class file %s",
506 class_index, CHECK);
507 cp->unresolved_value_type_at_put(index, class_index, num_klasses++);
508 break;
509 }
510 case JVM_CONSTANT_StringIndex: {
511 const int string_index = cp->string_index_at(index);
512 check_property(valid_symbol_at(string_index),
513 "Invalid constant pool index %u in class file %s",
514 string_index, CHECK);
515 Symbol* const sym = cp->symbol_at(string_index);
516 cp->unresolved_string_at_put(index, sym);
517 break;
518 }
519 case JVM_CONSTANT_MethodHandle: {
520 const int ref_index = cp->method_handle_index_at(index);
521 check_property(valid_cp_range(ref_index, length),
522 "Invalid constant pool index %u in class file %s",
523 ref_index, CHECK);
524 const constantTag tag = cp->tag_at(ref_index);
525 const int ref_kind = cp->method_handle_ref_kind_at(index);
526
527 switch (ref_kind) {
528 case JVM_REF_getField:
529 case JVM_REF_getStatic:
530 case JVM_REF_putField:
531 case JVM_REF_putStatic: {
532 check_property(
533 tag.is_field(),
534 "Invalid constant pool index %u in class file %s (not a field)",
535 ref_index, CHECK);
536 break;
537 }
538 case JVM_REF_invokeVirtual:
539 case JVM_REF_newInvokeSpecial: {
540 check_property(
541 tag.is_method(),
542 "Invalid constant pool index %u in class file %s (not a method)",
543 ref_index, CHECK);
544 break;
545 }
546 case JVM_REF_invokeStatic:
547 case JVM_REF_invokeSpecial: {
548 check_property(
549 tag.is_method() ||
550 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
551 "Invalid constant pool index %u in class file %s (not a method)",
552 ref_index, CHECK);
553 break;
554 }
555 case JVM_REF_invokeInterface: {
556 check_property(
557 tag.is_interface_method(),
558 "Invalid constant pool index %u in class file %s (not an interface method)",
559 ref_index, CHECK);
560 break;
561 }
562 default: {
563 classfile_parse_error(
564 "Bad method handle kind at constant pool index %u in class file %s",
565 index, CHECK);
566 }
567 } // switch(refkind)
568 // Keep the ref_index unchanged. It will be indirected at link-time.
569 break;
570 } // case MethodHandle
571 case JVM_CONSTANT_MethodType: {
572 const int ref_index = cp->method_type_index_at(index);
573 check_property(valid_symbol_at(ref_index),
574 "Invalid constant pool index %u in class file %s",
575 ref_index, CHECK);
576 break;
577 }
578 case JVM_CONSTANT_Dynamic: {
579 const int name_and_type_ref_index =
580 cp->invoke_dynamic_name_and_type_ref_index_at(index);
581
582 check_property(valid_cp_range(name_and_type_ref_index, length) &&
583 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
584 "Invalid constant pool index %u in class file %s",
585 name_and_type_ref_index, CHECK);
586 // bootstrap specifier index must be checked later,
587 // when BootstrapMethods attr is available
588
589 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
590 cp->set_has_dynamic_constant();
591 break;
592 }
593 case JVM_CONSTANT_InvokeDynamic: {
594 const int name_and_type_ref_index =
595 cp->invoke_dynamic_name_and_type_ref_index_at(index);
596
597 check_property(valid_cp_range(name_and_type_ref_index, length) &&
598 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
599 "Invalid constant pool index %u in class file %s",
600 name_and_type_ref_index, CHECK);
601 // bootstrap specifier index must be checked later,
602 // when BootstrapMethods attr is available
603 break;
604 }
605 default: {
606 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
607 ShouldNotReachHere();
608 break;
609 }
610 } // switch(tag)
611 } // end of for
612
613 _first_patched_klass_resolved_index = num_klasses;
614 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
615
616 if (_cp_patches != NULL) {
617 // need to treat this_class specially...
618
619 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
620 // for now. These will be replaced with actual names of the patched classes in patch_class().
621 Symbol* s = vmSymbols::star_name();
622 for (int n=_orig_cp_size; n<cp->length(); n++) {
623 cp->symbol_at_put(n, s);
624 }
625
626 int this_class_index;
627 {
628 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
629 const u1* const mark = stream->current();
630 stream->skip_u2_fast(1); // skip flags
631 this_class_index = stream->get_u2_fast();
632 stream->set_current(mark); // revert to mark
633 }
634
635 for (index = 1; index < length; index++) { // Index 0 is unused
636 if (has_cp_patch_at(index)) {
637 guarantee_property(index != this_class_index,
638 "Illegal constant pool patch to self at %d in class file %s",
639 index, CHECK);
640 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
641 }
642 }
643 }
644
645 if (!_need_verify) {
646 return;
647 }
648
649 // second verification pass - checks the strings are of the right format.
650 // but not yet to the other entries
651 for (index = 1; index < length; index++) {
652 const jbyte tag = cp->tag_at(index).value();
653 switch (tag) {
654 case JVM_CONSTANT_UnresolvedClass:
655 case JVM_CONSTANT_UnresolvedValue: {
656 const Symbol* const class_name = cp->klass_name_at(index);
657 // check the name, even if _cp_patches will overwrite it
658 verify_legal_class_name(class_name, CHECK);
659 break;
660 }
661 case JVM_CONSTANT_NameAndType: {
662 if (_need_verify) {
663 const int sig_index = cp->signature_ref_index_at(index);
664 const int name_index = cp->name_ref_index_at(index);
665 const Symbol* const name = cp->symbol_at(name_index);
666 const Symbol* const sig = cp->symbol_at(sig_index);
667 guarantee_property(sig->utf8_length() != 0,
668 "Illegal zero length constant pool entry at %d in class %s",
669 sig_index, CHECK);
670 guarantee_property(name->utf8_length() != 0,
671 "Illegal zero length constant pool entry at %d in class %s",
672 name_index, CHECK);
673
674 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
675 // Format check method name and signature
676 verify_legal_method_name(name, CHECK);
677 verify_legal_method_signature(name, sig, CHECK);
678 } else {
679 // Format check field name and signature
680 verify_legal_field_name(name, CHECK);
681 verify_legal_field_signature(name, sig, CHECK);
682 }
683 }
684 break;
685 }
686 case JVM_CONSTANT_Dynamic: {
687 const int name_and_type_ref_index =
688 cp->name_and_type_ref_index_at(index);
689 // already verified to be utf8
690 const int name_ref_index =
691 cp->name_ref_index_at(name_and_type_ref_index);
692 // already verified to be utf8
693 const int signature_ref_index =
694 cp->signature_ref_index_at(name_and_type_ref_index);
695 const Symbol* const name = cp->symbol_at(name_ref_index);
696 const Symbol* const signature = cp->symbol_at(signature_ref_index);
697 if (_need_verify) {
698 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
699 // Need only to be sure signature is non-zero length and the right type.
700 if (signature->utf8_length() == 0 ||
701 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
702 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
703 }
704 }
705 break;
706 }
707 case JVM_CONSTANT_InvokeDynamic:
708 case JVM_CONSTANT_Fieldref:
709 case JVM_CONSTANT_Methodref:
710 case JVM_CONSTANT_InterfaceMethodref: {
711 const int name_and_type_ref_index =
712 cp->name_and_type_ref_index_at(index);
713 // already verified to be utf8
714 const int name_ref_index =
715 cp->name_ref_index_at(name_and_type_ref_index);
716 // already verified to be utf8
717 const int signature_ref_index =
718 cp->signature_ref_index_at(name_and_type_ref_index);
719 const Symbol* const name = cp->symbol_at(name_ref_index);
720 const Symbol* const signature = cp->symbol_at(signature_ref_index);
721 if (tag == JVM_CONSTANT_Fieldref) {
722 if (_need_verify) {
723 // Field name and signature are verified above, when iterating NameAndType_info.
724 // Need only to be sure signature is non-zero length and the right type.
725 if (signature->utf8_length() == 0 ||
726 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
727 throwIllegalSignature("Field", name, signature, CHECK);
728 }
729 }
730 } else {
731 if (_need_verify) {
732 // Method name and signature are verified above, when iterating NameAndType_info.
733 // Need only to be sure signature is non-zero length and the right type.
734 if (signature->utf8_length() == 0 ||
735 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
736 throwIllegalSignature("Method", name, signature, CHECK);
737 }
738 }
739 // 4509014: If a class method name begins with '<', it must be "<init>"
740 const unsigned int name_len = name->utf8_length();
741 if (tag == JVM_CONSTANT_Methodref &&
742 name_len != 0 &&
743 name->byte_at(0) == '<' &&
744 name != vmSymbols::object_initializer_name()) {
745 classfile_parse_error(
746 "Bad method name at constant pool index %u in class file %s",
747 name_ref_index, CHECK);
748 }
749 }
750 break;
751 }
752 case JVM_CONSTANT_MethodHandle: {
753 const int ref_index = cp->method_handle_index_at(index);
754 const int ref_kind = cp->method_handle_ref_kind_at(index);
755 switch (ref_kind) {
756 case JVM_REF_invokeVirtual:
757 case JVM_REF_invokeStatic:
758 case JVM_REF_invokeSpecial:
759 case JVM_REF_newInvokeSpecial: {
760 const int name_and_type_ref_index =
761 cp->name_and_type_ref_index_at(ref_index);
762 const int name_ref_index =
763 cp->name_ref_index_at(name_and_type_ref_index);
764 const Symbol* const name = cp->symbol_at(name_ref_index);
765 if (ref_kind == JVM_REF_newInvokeSpecial) {
766 if (name != vmSymbols::object_initializer_name()) {
767 classfile_parse_error(
768 "Bad constructor name at constant pool index %u in class file %s",
769 name_ref_index, CHECK);
770 }
771 } else {
772 if (name == vmSymbols::object_initializer_name()) {
773 classfile_parse_error(
774 "Bad method name at constant pool index %u in class file %s",
775 name_ref_index, CHECK);
776 }
777 }
778 break;
779 }
780 // Other ref_kinds are already fully checked in previous pass.
781 } // switch(ref_kind)
782 break;
783 }
784 case JVM_CONSTANT_MethodType: {
785 const Symbol* const no_name = vmSymbols::type_name(); // place holder
786 const Symbol* const signature = cp->method_type_signature_at(index);
787 verify_legal_method_signature(no_name, signature, CHECK);
788 break;
789 }
790 case JVM_CONSTANT_Utf8: {
791 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
792 }
793 } // switch(tag)
794 } // end of for
795 }
796
797 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
798 int name_index = _orig_cp_size + _num_patched_klasses;
799 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
800
801 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
802 _num_patched_klasses ++;
803 }
804
805 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
806 int index,
807 Handle patch,
808 TRAPS) {
809 assert(cp != NULL, "invariant");
810
811 BasicType patch_type = T_VOID;
812
813 switch (cp->tag_at(index).value()) {
814
815 case JVM_CONSTANT_UnresolvedClass: {
816 // Patching a class means pre-resolving it.
817 // The name in the constant pool is ignored.
818 if (java_lang_Class::is_instance(patch())) {
819 guarantee_property(!java_lang_Class::is_primitive(patch()),
820 "Illegal class patch at %d in class file %s",
821 index, CHECK);
822 Klass* k = java_lang_Class::as_Klass(patch());
823 patch_class(cp, index, k, k->name());
824 } else {
825 guarantee_property(java_lang_String::is_instance(patch()),
826 "Illegal class patch at %d in class file %s",
827 index, CHECK);
828 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
829 patch_class(cp, index, NULL, name);
830 }
831 break;
832 }
833
834 case JVM_CONSTANT_String: {
835 // skip this patch and don't clear it. Needs the oop array for resolved
836 // references to be created first.
837 return;
838 }
839 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
840 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
841 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
842 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
843 patch_prim:
844 {
845 jvalue value;
846 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
847 guarantee_property(value_type == patch_type,
848 "Illegal primitive patch at %d in class file %s",
849 index, CHECK);
850 switch (value_type) {
851 case T_INT: cp->int_at_put(index, value.i); break;
852 case T_FLOAT: cp->float_at_put(index, value.f); break;
853 case T_LONG: cp->long_at_put(index, value.j); break;
854 case T_DOUBLE: cp->double_at_put(index, value.d); break;
855 default: assert(false, "");
856 }
857 } // end patch_prim label
858 break;
859
860 default: {
861 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
862 guarantee_property(!has_cp_patch_at(index),
863 "Illegal unexpected patch at %d in class file %s",
864 index, CHECK);
865 return;
866 }
867 } // end of switch(tag)
868
869 // On fall-through, mark the patch as used.
870 clear_cp_patch_at(index);
871 }
872 class NameSigHash: public ResourceObj {
873 public:
874 const Symbol* _name; // name
875 const Symbol* _sig; // signature
876 NameSigHash* _next; // Next entry in hash table
877 };
878
879 static const int HASH_ROW_SIZE = 256;
880
881 static unsigned int hash(const Symbol* name, const Symbol* sig) {
882 unsigned int raw_hash = 0;
883 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
884 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
885
886 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
887 }
888
889
890 static void initialize_hashtable(NameSigHash** table) {
891 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
892 }
893 // Return false if the name/sig combination is found in table.
894 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
895 // The old format checker uses heap sort to find duplicates.
896 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
897 // of table since we don't expect Symbol*'s to move.
898 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
899 assert(name != NULL, "name in constant pool is NULL");
900
901 // First lookup for duplicates
902 int index = hash(name, sig);
903 NameSigHash* entry = table[index];
904 while (entry != NULL) {
905 if (entry->_name == name && entry->_sig == sig) {
906 return false;
907 }
908 entry = entry->_next;
909 }
910
911 // No duplicate is found, allocate a new entry and fill it.
912 entry = new NameSigHash();
913 entry->_name = name;
914 entry->_sig = sig;
915
916 // Insert into hash table
917 entry->_next = table[index];
918 table[index] = entry;
919
920 return true;
921 }
922
923 // Side-effects: populates the _local_interfaces field
924 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
925 const int itfs_len,
926 ConstantPool* const cp,
927 bool* const has_nonstatic_concrete_methods,
928 TRAPS) {
929 assert(stream != NULL, "invariant");
930 assert(cp != NULL, "invariant");
931 assert(has_nonstatic_concrete_methods != NULL, "invariant");
932
933 if (itfs_len == 0) {
934 _local_interfaces = Universe::the_empty_klass_array();
935 } else {
936 assert(itfs_len > 0, "only called for len>0");
937 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
938
939 int index;
940 for (index = 0; index < itfs_len; index++) {
941 const u2 interface_index = stream->get_u2(CHECK);
942 Klass* interf;
943 check_property(
944 valid_klass_reference_at(interface_index),
945 "Interface name has bad constant pool index %u in class file %s",
946 interface_index, CHECK);
947 if (cp->tag_at(interface_index).is_klass()) {
948 interf = cp->resolved_klass_at(interface_index);
949 } else {
950 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
951
952 // Don't need to check legal name because it's checked when parsing constant pool.
953 // But need to make sure it's not an array type.
954 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
955 "Bad interface name in class file %s", CHECK);
956
957 // Call resolve_super so classcircularity is checked
958 interf = SystemDictionary::resolve_super_or_fail(
959 _class_name,
960 unresolved_klass,
961 Handle(THREAD, _loader_data->class_loader()),
962 _protection_domain,
963 false,
964 CHECK);
965 }
966
967 if (!interf->is_interface()) {
968 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
969 "Implementing class");
970 }
971
972 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
973 *has_nonstatic_concrete_methods = true;
974 }
975 _local_interfaces->at_put(index, interf);
976 }
977
978 if (!_need_verify || itfs_len <= 1) {
979 return;
980 }
981
982 // Check if there's any duplicates in interfaces
983 ResourceMark rm(THREAD);
984 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
985 NameSigHash*,
986 HASH_ROW_SIZE);
987 initialize_hashtable(interface_names);
988 bool dup = false;
989 const Symbol* name = NULL;
990 {
991 debug_only(NoSafepointVerifier nsv;)
992 for (index = 0; index < itfs_len; index++) {
993 const Klass* const k = _local_interfaces->at(index);
994 name = InstanceKlass::cast(k)->name();
995 // If no duplicates, add (name, NULL) in hashtable interface_names.
996 if (!put_after_lookup(name, NULL, interface_names)) {
997 dup = true;
998 break;
999 }
1000 }
1001 }
1002 if (dup) {
1003 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
1004 name->as_C_string(), CHECK);
1005 }
1006 }
1007 }
1008
1009 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
1010 int constantvalue_index,
1011 int signature_index,
1012 TRAPS) const {
1013 // Make sure the constant pool entry is of a type appropriate to this field
1014 guarantee_property(
1015 (constantvalue_index > 0 &&
1016 constantvalue_index < cp->length()),
1017 "Bad initial value index %u in ConstantValue attribute in class file %s",
1018 constantvalue_index, CHECK);
1019
1020 const constantTag value_type = cp->tag_at(constantvalue_index);
1021 switch(cp->basic_type_for_signature_at(signature_index)) {
1022 case T_LONG: {
1023 guarantee_property(value_type.is_long(),
1024 "Inconsistent constant value type in class file %s",
1025 CHECK);
1026 break;
1027 }
1028 case T_FLOAT: {
1029 guarantee_property(value_type.is_float(),
1030 "Inconsistent constant value type in class file %s",
1031 CHECK);
1032 break;
1033 }
1034 case T_DOUBLE: {
1035 guarantee_property(value_type.is_double(),
1036 "Inconsistent constant value type in class file %s",
1037 CHECK);
1038 break;
1039 }
1040 case T_BYTE:
1041 case T_CHAR:
1042 case T_SHORT:
1043 case T_BOOLEAN:
1044 case T_INT: {
1045 guarantee_property(value_type.is_int(),
1046 "Inconsistent constant value type in class file %s",
1047 CHECK);
1048 break;
1049 }
1050 case T_OBJECT: {
1051 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1052 && value_type.is_string()),
1053 "Bad string initial value in class file %s",
1054 CHECK);
1055 break;
1056 }
1057 default: {
1058 classfile_parse_error("Unable to set initial value %u in class file %s",
1059 constantvalue_index,
1060 CHECK);
1061 }
1062 }
1063 }
1064
1065 class AnnotationCollector : public ResourceObj{
1066 public:
1067 enum Location { _in_field, _in_method, _in_class };
1068 enum ID {
1069 _unknown = 0,
1070 _method_CallerSensitive,
1071 _method_ForceInline,
1072 _method_DontInline,
1073 _method_InjectedProfile,
1074 _method_LambdaForm_Compiled,
1075 _method_LambdaForm_Hidden,
1076 _method_HotSpotIntrinsicCandidate,
1077 _jdk_internal_vm_annotation_Contended,
1078 _field_Stable,
1079 _jdk_internal_vm_annotation_ReservedStackAccess,
1080 _annotation_LIMIT
1081 };
1082 const Location _location;
1083 int _annotations_present;
1084 u2 _contended_group;
1085
1086 AnnotationCollector(Location location)
1087 : _location(location), _annotations_present(0)
1088 {
1089 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1090 }
1091 // If this annotation name has an ID, report it (or _none).
1092 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1093 // Set the annotation name:
1094 void set_annotation(ID id) {
1095 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1096 _annotations_present |= nth_bit((int)id);
1097 }
1098
1099 void remove_annotation(ID id) {
1100 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1101 _annotations_present &= ~nth_bit((int)id);
1102 }
1103
1104 // Report if the annotation is present.
1105 bool has_any_annotations() const { return _annotations_present != 0; }
1106 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1107
1108 void set_contended_group(u2 group) { _contended_group = group; }
1109 u2 contended_group() const { return _contended_group; }
1110
1111 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1112
1113 void set_stable(bool stable) { set_annotation(_field_Stable); }
1114 bool is_stable() const { return has_annotation(_field_Stable); }
1115 };
1116
1117 // This class also doubles as a holder for metadata cleanup.
1118 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1119 private:
1120 ClassLoaderData* _loader_data;
1121 AnnotationArray* _field_annotations;
1122 AnnotationArray* _field_type_annotations;
1123 public:
1124 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1125 AnnotationCollector(_in_field),
1126 _loader_data(loader_data),
1127 _field_annotations(NULL),
1128 _field_type_annotations(NULL) {}
1129 ~FieldAnnotationCollector();
1130 void apply_to(FieldInfo* f);
1131 AnnotationArray* field_annotations() { return _field_annotations; }
1132 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1133
1134 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1135 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1136 };
1137
1138 class MethodAnnotationCollector : public AnnotationCollector{
1139 public:
1140 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1141 void apply_to(const methodHandle& m);
1142 };
1143
1144 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1145 public:
1146 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1147 void apply_to(InstanceKlass* ik);
1148 };
1149
1150
1151 static int skip_annotation_value(const u1*, int, int); // fwd decl
1152
1153 // Safely increment index by val if does not pass limit
1154 #define SAFE_ADD(index, limit, val) \
1155 if (index >= limit - val) return limit; \
1156 index += val;
1157
1158 // Skip an annotation. Return >=limit if there is any problem.
1159 static int skip_annotation(const u1* buffer, int limit, int index) {
1160 assert(buffer != NULL, "invariant");
1161 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1162 // value := switch (tag:u1) { ... }
1163 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1164 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1165 while (--nmem >= 0 && index < limit) {
1166 SAFE_ADD(index, limit, 2); // skip member
1167 index = skip_annotation_value(buffer, limit, index);
1168 }
1169 return index;
1170 }
1171
1172 // Skip an annotation value. Return >=limit if there is any problem.
1173 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1174 assert(buffer != NULL, "invariant");
1175
1176 // value := switch (tag:u1) {
1177 // case B, C, I, S, Z, D, F, J, c: con:u2;
1178 // case e: e_class:u2 e_name:u2;
1179 // case s: s_con:u2;
1180 // case [: do(nval:u2) {value};
1181 // case @: annotation;
1182 // case s: s_con:u2;
1183 // }
1184 SAFE_ADD(index, limit, 1); // read tag
1185 const u1 tag = buffer[index - 1];
1186 switch (tag) {
1187 case 'B':
1188 case 'C':
1189 case 'I':
1190 case 'S':
1191 case 'Z':
1192 case 'D':
1193 case 'F':
1194 case 'J':
1195 case 'c':
1196 case 's':
1197 SAFE_ADD(index, limit, 2); // skip con or s_con
1198 break;
1199 case 'e':
1200 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1201 break;
1202 case '[':
1203 {
1204 SAFE_ADD(index, limit, 2); // read nval
1205 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1206 while (--nval >= 0 && index < limit) {
1207 index = skip_annotation_value(buffer, limit, index);
1208 }
1209 }
1210 break;
1211 case '@':
1212 index = skip_annotation(buffer, limit, index);
1213 break;
1214 default:
1215 return limit; // bad tag byte
1216 }
1217 return index;
1218 }
1219
1220 // Sift through annotations, looking for those significant to the VM:
1221 static void parse_annotations(const ConstantPool* const cp,
1222 const u1* buffer, int limit,
1223 AnnotationCollector* coll,
1224 ClassLoaderData* loader_data,
1225 TRAPS) {
1226
1227 assert(cp != NULL, "invariant");
1228 assert(buffer != NULL, "invariant");
1229 assert(coll != NULL, "invariant");
1230 assert(loader_data != NULL, "invariant");
1231
1232 // annotations := do(nann:u2) {annotation}
1233 int index = 2; // read nann
1234 if (index >= limit) return;
1235 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1236 enum { // initial annotation layout
1237 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1238 count_off = 2, // u2 such as 1 (one value)
1239 member_off = 4, // utf8 such as 'value'
1240 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1241 e_tag_val = 'e',
1242 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1243 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1244 e_size = 11, // end of 'e' annotation
1245 c_tag_val = 'c', // payload is type
1246 c_con_off = 7, // utf8 payload, such as 'I'
1247 c_size = 9, // end of 'c' annotation
1248 s_tag_val = 's', // payload is String
1249 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1250 s_size = 9,
1251 min_size = 6 // smallest possible size (zero members)
1252 };
1253 // Cannot add min_size to index in case of overflow MAX_INT
1254 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1255 int index0 = index;
1256 index = skip_annotation(buffer, limit, index);
1257 const u1* const abase = buffer + index0;
1258 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1259 const int count = Bytes::get_Java_u2((address)abase + count_off);
1260 const Symbol* const aname = check_symbol_at(cp, atype);
1261 if (aname == NULL) break; // invalid annotation name
1262 const Symbol* member = NULL;
1263 if (count >= 1) {
1264 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1265 member = check_symbol_at(cp, member_index);
1266 if (member == NULL) break; // invalid member name
1267 }
1268
1269 // Here is where parsing particular annotations will take place.
1270 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1271 if (AnnotationCollector::_unknown == id) continue;
1272 coll->set_annotation(id);
1273
1274 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1275 // @Contended can optionally specify the contention group.
1276 //
1277 // Contended group defines the equivalence class over the fields:
1278 // the fields within the same contended group are not treated distinct.
1279 // The only exception is default group, which does not incur the
1280 // equivalence. Naturally, contention group for classes is meaningless.
1281 //
1282 // While the contention group is specified as String, annotation
1283 // values are already interned, and we might as well use the constant
1284 // pool index as the group tag.
1285 //
1286 u2 group_index = 0; // default contended group
1287 if (count == 1
1288 && s_size == (index - index0) // match size
1289 && s_tag_val == *(abase + tag_off)
1290 && member == vmSymbols::value_name()) {
1291 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1292 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1293 group_index = 0; // default contended group
1294 }
1295 }
1296 coll->set_contended_group(group_index);
1297 }
1298 }
1299 }
1300
1301
1302 // Parse attributes for a field.
1303 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1304 u2 attributes_count,
1305 bool is_static, u2 signature_index,
1306 u2* const constantvalue_index_addr,
1307 bool* const is_synthetic_addr,
1308 u2* const generic_signature_index_addr,
1309 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1310 TRAPS) {
1311 assert(cfs != NULL, "invariant");
1312 assert(constantvalue_index_addr != NULL, "invariant");
1313 assert(is_synthetic_addr != NULL, "invariant");
1314 assert(generic_signature_index_addr != NULL, "invariant");
1315 assert(parsed_annotations != NULL, "invariant");
1316 assert(attributes_count > 0, "attributes_count should be greater than 0");
1317
1318 u2 constantvalue_index = 0;
1319 u2 generic_signature_index = 0;
1320 bool is_synthetic = false;
1321 const u1* runtime_visible_annotations = NULL;
1322 int runtime_visible_annotations_length = 0;
1323 const u1* runtime_invisible_annotations = NULL;
1324 int runtime_invisible_annotations_length = 0;
1325 const u1* runtime_visible_type_annotations = NULL;
1326 int runtime_visible_type_annotations_length = 0;
1327 const u1* runtime_invisible_type_annotations = NULL;
1328 int runtime_invisible_type_annotations_length = 0;
1329 bool runtime_invisible_annotations_exists = false;
1330 bool runtime_invisible_type_annotations_exists = false;
1331 const ConstantPool* const cp = _cp;
1332
1333 while (attributes_count--) {
1334 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1335 const u2 attribute_name_index = cfs->get_u2_fast();
1336 const u4 attribute_length = cfs->get_u4_fast();
1337 check_property(valid_symbol_at(attribute_name_index),
1338 "Invalid field attribute index %u in class file %s",
1339 attribute_name_index,
1340 CHECK);
1341
1342 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1343 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1344 // ignore if non-static
1345 if (constantvalue_index != 0) {
1346 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1347 }
1348 check_property(
1349 attribute_length == 2,
1350 "Invalid ConstantValue field attribute length %u in class file %s",
1351 attribute_length, CHECK);
1352
1353 constantvalue_index = cfs->get_u2(CHECK);
1354 if (_need_verify) {
1355 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1356 }
1357 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1358 if (attribute_length != 0) {
1359 classfile_parse_error(
1360 "Invalid Synthetic field attribute length %u in class file %s",
1361 attribute_length, CHECK);
1362 }
1363 is_synthetic = true;
1364 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1365 if (attribute_length != 0) {
1366 classfile_parse_error(
1367 "Invalid Deprecated field attribute length %u in class file %s",
1368 attribute_length, CHECK);
1369 }
1370 } else if (_major_version >= JAVA_1_5_VERSION) {
1371 if (attribute_name == vmSymbols::tag_signature()) {
1372 if (generic_signature_index != 0) {
1373 classfile_parse_error(
1374 "Multiple Signature attributes for field in class file %s", CHECK);
1375 }
1376 if (attribute_length != 2) {
1377 classfile_parse_error(
1378 "Wrong size %u for field's Signature attribute in class file %s",
1379 attribute_length, CHECK);
1380 }
1381 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1382 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1383 if (runtime_visible_annotations != NULL) {
1384 classfile_parse_error(
1385 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1386 }
1387 runtime_visible_annotations_length = attribute_length;
1388 runtime_visible_annotations = cfs->current();
1389 assert(runtime_visible_annotations != NULL, "null visible annotations");
1390 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1391 parse_annotations(cp,
1392 runtime_visible_annotations,
1393 runtime_visible_annotations_length,
1394 parsed_annotations,
1395 _loader_data,
1396 CHECK);
1397 cfs->skip_u1_fast(runtime_visible_annotations_length);
1398 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1399 if (runtime_invisible_annotations_exists) {
1400 classfile_parse_error(
1401 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1402 }
1403 runtime_invisible_annotations_exists = true;
1404 if (PreserveAllAnnotations) {
1405 runtime_invisible_annotations_length = attribute_length;
1406 runtime_invisible_annotations = cfs->current();
1407 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1408 }
1409 cfs->skip_u1(attribute_length, CHECK);
1410 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1411 if (runtime_visible_type_annotations != NULL) {
1412 classfile_parse_error(
1413 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1414 }
1415 runtime_visible_type_annotations_length = attribute_length;
1416 runtime_visible_type_annotations = cfs->current();
1417 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1418 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1419 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1420 if (runtime_invisible_type_annotations_exists) {
1421 classfile_parse_error(
1422 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1423 } else {
1424 runtime_invisible_type_annotations_exists = true;
1425 }
1426 if (PreserveAllAnnotations) {
1427 runtime_invisible_type_annotations_length = attribute_length;
1428 runtime_invisible_type_annotations = cfs->current();
1429 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1430 }
1431 cfs->skip_u1(attribute_length, CHECK);
1432 } else {
1433 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1434 }
1435 } else {
1436 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1437 }
1438 }
1439
1440 *constantvalue_index_addr = constantvalue_index;
1441 *is_synthetic_addr = is_synthetic;
1442 *generic_signature_index_addr = generic_signature_index;
1443 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1444 runtime_visible_annotations_length,
1445 runtime_invisible_annotations,
1446 runtime_invisible_annotations_length,
1447 CHECK);
1448 parsed_annotations->set_field_annotations(a);
1449 a = assemble_annotations(runtime_visible_type_annotations,
1450 runtime_visible_type_annotations_length,
1451 runtime_invisible_type_annotations,
1452 runtime_invisible_type_annotations_length,
1453 CHECK);
1454 parsed_annotations->set_field_type_annotations(a);
1455 return;
1456 }
1457
1458
1459 // Field allocation types. Used for computing field offsets.
1460
1461 enum FieldAllocationType {
1462 STATIC_OOP, // Oops
1463 STATIC_BYTE, // Boolean, Byte, char
1464 STATIC_SHORT, // shorts
1465 STATIC_WORD, // ints
1466 STATIC_DOUBLE, // aligned long or double
1467 STATIC_FLATTENABLE, // flattenable field
1468 NONSTATIC_OOP,
1469 NONSTATIC_BYTE,
1470 NONSTATIC_SHORT,
1471 NONSTATIC_WORD,
1472 NONSTATIC_DOUBLE,
1473 NONSTATIC_FLATTENABLE,
1474 MAX_FIELD_ALLOCATION_TYPE,
1475 BAD_ALLOCATION_TYPE = -1
1476 };
1477
1478 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1479 BAD_ALLOCATION_TYPE, // 0
1480 BAD_ALLOCATION_TYPE, // 1
1481 BAD_ALLOCATION_TYPE, // 2
1482 BAD_ALLOCATION_TYPE, // 3
1483 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1484 NONSTATIC_SHORT, // T_CHAR = 5,
1485 NONSTATIC_WORD, // T_FLOAT = 6,
1486 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1487 NONSTATIC_BYTE, // T_BYTE = 8,
1488 NONSTATIC_SHORT, // T_SHORT = 9,
1489 NONSTATIC_WORD, // T_INT = 10,
1490 NONSTATIC_DOUBLE, // T_LONG = 11,
1491 NONSTATIC_OOP, // T_OBJECT = 12,
1492 NONSTATIC_OOP, // T_ARRAY = 13,
1493 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1494 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1495 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1496 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1497 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1498 BAD_ALLOCATION_TYPE, // T_VALUETYPEPTR= 20,
1499 BAD_ALLOCATION_TYPE, // T_CONFLICT = 21,
1500 BAD_ALLOCATION_TYPE, // 0
1501 BAD_ALLOCATION_TYPE, // 1
1502 BAD_ALLOCATION_TYPE, // 2
1503 BAD_ALLOCATION_TYPE, // 3
1504 STATIC_BYTE , // T_BOOLEAN = 4,
1505 STATIC_SHORT, // T_CHAR = 5,
1506 STATIC_WORD, // T_FLOAT = 6,
1507 STATIC_DOUBLE, // T_DOUBLE = 7,
1508 STATIC_BYTE, // T_BYTE = 8,
1509 STATIC_SHORT, // T_SHORT = 9,
1510 STATIC_WORD, // T_INT = 10,
1511 STATIC_DOUBLE, // T_LONG = 11,
1512 STATIC_OOP, // T_OBJECT = 12,
1513 STATIC_OOP, // T_ARRAY = 13,
1514 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1515 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1516 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1517 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1518 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1519 BAD_ALLOCATION_TYPE, // T_VALUETYPEPTR= 20,
1520 BAD_ALLOCATION_TYPE, // T_CONFLICT = 21,
1521 };
1522
1523 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1524 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1525 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1526 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1527 return result;
1528 }
1529
1530 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1531 public:
1532 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1533
1534 FieldAllocationCount() {
1535 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1536 count[i] = 0;
1537 }
1538 }
1539
1540 FieldAllocationType update(bool is_static, BasicType type) {
1541 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1542 if (atype != BAD_ALLOCATION_TYPE) {
1543 // Make sure there is no overflow with injected fields.
1544 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1545 count[atype]++;
1546 }
1547 return atype;
1548 }
1549 };
1550
1551 // Side-effects: populates the _fields, _fields_annotations,
1552 // _fields_type_annotations fields
1553 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1554 bool is_interface,
1555 bool is_concrete_value_type,
1556 FieldAllocationCount* const fac,
1557 ConstantPool* cp,
1558 const int cp_size,
1559 u2* const java_fields_count_ptr,
1560 TRAPS) {
1561
1562 assert(cfs != NULL, "invariant");
1563 assert(fac != NULL, "invariant");
1564 assert(cp != NULL, "invariant");
1565 assert(java_fields_count_ptr != NULL, "invariant");
1566
1567 assert(NULL == _fields, "invariant");
1568 assert(NULL == _fields_annotations, "invariant");
1569 assert(NULL == _fields_type_annotations, "invariant");
1570
1571 cfs->guarantee_more(2, CHECK); // length
1572 const u2 length = cfs->get_u2_fast();
1573 *java_fields_count_ptr = length;
1574
1575 int num_injected = 0;
1576 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1577 &num_injected);
1578
1579 const int total_fields = length + num_injected + (is_concrete_value_type ? 1 : 0);
1580
1581 // The field array starts with tuples of shorts
1582 // [access, name index, sig index, initial value index, byte offset].
1583 // A generic signature slot only exists for field with generic
1584 // signature attribute. And the access flag is set with
1585 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1586 // signature slots are at the end of the field array and after all
1587 // other fields data.
1588 //
1589 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1590 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1591 // ...
1592 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1593 // [generic signature index]
1594 // [generic signature index]
1595 // ...
1596 //
1597 // Allocate a temporary resource array for field data. For each field,
1598 // a slot is reserved in the temporary array for the generic signature
1599 // index. After parsing all fields, the data are copied to a permanent
1600 // array and any unused slots will be discarded.
1601 ResourceMark rm(THREAD);
1602 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1603 u2,
1604 total_fields * (FieldInfo::field_slots + 1));
1605
1606 // The generic signature slots start after all other fields' data.
1607 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1608 int num_generic_signature = 0;
1609 for (int n = 0; n < length; n++) {
1610 // access_flags, name_index, descriptor_index, attributes_count
1611 cfs->guarantee_more(8, CHECK);
1612
1613 AccessFlags access_flags;
1614 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1615 verify_legal_field_modifiers(flags, is_interface, CHECK);
1616 access_flags.set_flags(flags);
1617
1618 const u2 name_index = cfs->get_u2_fast();
1619 check_property(valid_symbol_at(name_index),
1620 "Invalid constant pool index %u for field name in class file %s",
1621 name_index, CHECK);
1622 const Symbol* const name = cp->symbol_at(name_index);
1623 verify_legal_field_name(name, CHECK);
1624
1625 const u2 signature_index = cfs->get_u2_fast();
1626 check_property(valid_symbol_at(signature_index),
1627 "Invalid constant pool index %u for field signature in class file %s",
1628 signature_index, CHECK);
1629 const Symbol* const sig = cp->symbol_at(signature_index);
1630 verify_legal_field_signature(name, sig, CHECK);
1631 if (access_flags.is_flattenable()) {
1632 _has_flattenable_fields = true;
1633 }
1634
1635 u2 constantvalue_index = 0;
1636 bool is_synthetic = false;
1637 u2 generic_signature_index = 0;
1638 const bool is_static = access_flags.is_static();
1639 FieldAnnotationCollector parsed_annotations(_loader_data);
1640
1641 const u2 attributes_count = cfs->get_u2_fast();
1642 if (attributes_count > 0) {
1643 parse_field_attributes(cfs,
1644 attributes_count,
1645 is_static,
1646 signature_index,
1647 &constantvalue_index,
1648 &is_synthetic,
1649 &generic_signature_index,
1650 &parsed_annotations,
1651 CHECK);
1652
1653 if (parsed_annotations.field_annotations() != NULL) {
1654 if (_fields_annotations == NULL) {
1655 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1656 _loader_data, length, NULL,
1657 CHECK);
1658 }
1659 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1660 parsed_annotations.set_field_annotations(NULL);
1661 }
1662 if (parsed_annotations.field_type_annotations() != NULL) {
1663 if (_fields_type_annotations == NULL) {
1664 _fields_type_annotations =
1665 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1666 length,
1667 NULL,
1668 CHECK);
1669 }
1670 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1671 parsed_annotations.set_field_type_annotations(NULL);
1672 }
1673
1674 if (is_synthetic) {
1675 access_flags.set_is_synthetic();
1676 }
1677 if (generic_signature_index != 0) {
1678 access_flags.set_field_has_generic_signature();
1679 fa[generic_signature_slot] = generic_signature_index;
1680 generic_signature_slot ++;
1681 num_generic_signature ++;
1682 }
1683 }
1684
1685 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1686 field->initialize(access_flags.as_short(),
1687 name_index,
1688 signature_index,
1689 constantvalue_index);
1690 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1691
1692 // Remember how many oops we encountered and compute allocation type
1693 const FieldAllocationType atype = fac->update(is_static, type);
1694 field->set_allocation_type(atype);
1695
1696 // After field is initialized with type, we can augment it with aux info
1697 if (parsed_annotations.has_any_annotations())
1698 parsed_annotations.apply_to(field);
1699 }
1700
1701 int index = length;
1702 if (num_injected != 0) {
1703 for (int n = 0; n < num_injected; n++) {
1704 // Check for duplicates
1705 if (injected[n].may_be_java) {
1706 const Symbol* const name = injected[n].name();
1707 const Symbol* const signature = injected[n].signature();
1708 bool duplicate = false;
1709 for (int i = 0; i < length; i++) {
1710 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1711 if (name == cp->symbol_at(f->name_index()) &&
1712 signature == cp->symbol_at(f->signature_index())) {
1713 // Symbol is desclared in Java so skip this one
1714 duplicate = true;
1715 break;
1716 }
1717 }
1718 if (duplicate) {
1719 // These will be removed from the field array at the end
1720 continue;
1721 }
1722 }
1723
1724 // Injected field
1725 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1726 field->initialize(JVM_ACC_FIELD_INTERNAL,
1727 injected[n].name_index,
1728 injected[n].signature_index,
1729 0);
1730
1731 const BasicType type = FieldType::basic_type(injected[n].signature());
1732
1733 // Remember how many oops we encountered and compute allocation type
1734 const FieldAllocationType atype = fac->update(false, type);
1735 field->set_allocation_type(atype);
1736 index++;
1737 }
1738 }
1739
1740 if (is_concrete_value_type) {
1741 index = length + num_injected;
1742 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1743 field->initialize(JVM_ACC_FIELD_INTERNAL | JVM_ACC_STATIC,
1744 vmSymbols::default_value_name_enum,
1745 vmSymbols::java_lang_Object_enum,
1746 0);
1747 const BasicType type = FieldType::basic_type(vmSymbols::object_signature());
1748 const FieldAllocationType atype = fac->update(true, type);
1749 field->set_allocation_type(atype);
1750 index++;
1751 }
1752
1753 assert(NULL == _fields, "invariant");
1754
1755 _fields =
1756 MetadataFactory::new_array<u2>(_loader_data,
1757 index * FieldInfo::field_slots + num_generic_signature,
1758 CHECK);
1759 // Sometimes injected fields already exist in the Java source so
1760 // the fields array could be too long. In that case the
1761 // fields array is trimed. Also unused slots that were reserved
1762 // for generic signature indexes are discarded.
1763 {
1764 int i = 0;
1765 for (; i < index * FieldInfo::field_slots; i++) {
1766 _fields->at_put(i, fa[i]);
1767 }
1768 for (int j = total_fields * FieldInfo::field_slots;
1769 j < generic_signature_slot; j++) {
1770 _fields->at_put(i++, fa[j]);
1771 }
1772 assert(_fields->length() == i, "");
1773 }
1774
1775 if (_need_verify && length > 1) {
1776 // Check duplicated fields
1777 ResourceMark rm(THREAD);
1778 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1779 THREAD, NameSigHash*, HASH_ROW_SIZE);
1780 initialize_hashtable(names_and_sigs);
1781 bool dup = false;
1782 const Symbol* name = NULL;
1783 const Symbol* sig = NULL;
1784 {
1785 debug_only(NoSafepointVerifier nsv;)
1786 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1787 name = fs.name();
1788 sig = fs.signature();
1789 // If no duplicates, add name/signature in hashtable names_and_sigs.
1790 if (!put_after_lookup(name, sig, names_and_sigs)) {
1791 dup = true;
1792 break;
1793 }
1794 }
1795 }
1796 if (dup) {
1797 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1798 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1799 }
1800 }
1801 }
1802
1803
1804 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1805 u4 code_length,
1806 u4 exception_table_length,
1807 TRAPS) {
1808 assert(cfs != NULL, "invariant");
1809
1810 const unsafe_u2* const exception_table_start = cfs->current();
1811 assert(exception_table_start != NULL, "null exception table");
1812
1813 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1814 // end_pc,
1815 // handler_pc,
1816 // catch_type_index
1817
1818 // Will check legal target after parsing code array in verifier.
1819 if (_need_verify) {
1820 for (unsigned int i = 0; i < exception_table_length; i++) {
1821 const u2 start_pc = cfs->get_u2_fast();
1822 const u2 end_pc = cfs->get_u2_fast();
1823 const u2 handler_pc = cfs->get_u2_fast();
1824 const u2 catch_type_index = cfs->get_u2_fast();
1825 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1826 "Illegal exception table range in class file %s",
1827 CHECK_NULL);
1828 guarantee_property(handler_pc < code_length,
1829 "Illegal exception table handler in class file %s",
1830 CHECK_NULL);
1831 if (catch_type_index != 0) {
1832 guarantee_property(valid_klass_reference_at(catch_type_index),
1833 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1834 }
1835 }
1836 } else {
1837 cfs->skip_u2_fast(exception_table_length * 4);
1838 }
1839 return exception_table_start;
1840 }
1841
1842 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1843 u4 code_length,
1844 CompressedLineNumberWriteStream**const write_stream,
1845 TRAPS) {
1846
1847 const ClassFileStream* const cfs = _stream;
1848 unsigned int num_entries = cfs->get_u2(CHECK);
1849
1850 // Each entry is a u2 start_pc, and a u2 line_number
1851 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1852
1853 // Verify line number attribute and table length
1854 check_property(
1855 code_attribute_length == sizeof(u2) + length_in_bytes,
1856 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1857
1858 cfs->guarantee_more(length_in_bytes, CHECK);
1859
1860 if ((*write_stream) == NULL) {
1861 if (length_in_bytes > fixed_buffer_size) {
1862 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1863 } else {
1864 (*write_stream) = new CompressedLineNumberWriteStream(
1865 _linenumbertable_buffer, fixed_buffer_size);
1866 }
1867 }
1868
1869 while (num_entries-- > 0) {
1870 const u2 bci = cfs->get_u2_fast(); // start_pc
1871 const u2 line = cfs->get_u2_fast(); // line_number
1872 guarantee_property(bci < code_length,
1873 "Invalid pc in LineNumberTable in class file %s", CHECK);
1874 (*write_stream)->write_pair(bci, line);
1875 }
1876 }
1877
1878
1879 class LVT_Hash : public AllStatic {
1880 public:
1881
1882 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1883 /*
1884 * 3-tuple start_bci/length/slot has to be unique key,
1885 * so the following comparison seems to be redundant:
1886 * && elem->name_cp_index == entry->_elem->name_cp_index
1887 */
1888 return (e0.start_bci == e1.start_bci &&
1889 e0.length == e1.length &&
1890 e0.name_cp_index == e1.name_cp_index &&
1891 e0.slot == e1.slot);
1892 }
1893
1894 static unsigned int hash(LocalVariableTableElement const& e0) {
1895 unsigned int raw_hash = e0.start_bci;
1896
1897 raw_hash = e0.length + raw_hash * 37;
1898 raw_hash = e0.name_cp_index + raw_hash * 37;
1899 raw_hash = e0.slot + raw_hash * 37;
1900
1901 return raw_hash;
1902 }
1903 };
1904
1905
1906 // Class file LocalVariableTable elements.
1907 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1908 public:
1909 u2 start_bci;
1910 u2 length;
1911 u2 name_cp_index;
1912 u2 descriptor_cp_index;
1913 u2 slot;
1914 };
1915
1916 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1917 LocalVariableTableElement* const lvt) {
1918 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1919 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1920 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1921 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1922 lvt->signature_cp_index = 0;
1923 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1924 }
1925
1926 // Function is used to parse both attributes:
1927 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1928 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1929 u4 code_length,
1930 u2 max_locals,
1931 u4 code_attribute_length,
1932 u2* const localvariable_table_length,
1933 bool isLVTT,
1934 TRAPS) {
1935 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1936 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1937 const unsigned int size =
1938 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1939
1940 const ConstantPool* const cp = _cp;
1941
1942 // Verify local variable table attribute has right length
1943 if (_need_verify) {
1944 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1945 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1946 }
1947
1948 const unsafe_u2* const localvariable_table_start = cfs->current();
1949 assert(localvariable_table_start != NULL, "null local variable table");
1950 if (!_need_verify) {
1951 cfs->skip_u2_fast(size);
1952 } else {
1953 cfs->guarantee_more(size * 2, CHECK_NULL);
1954 for(int i = 0; i < (*localvariable_table_length); i++) {
1955 const u2 start_pc = cfs->get_u2_fast();
1956 const u2 length = cfs->get_u2_fast();
1957 const u2 name_index = cfs->get_u2_fast();
1958 const u2 descriptor_index = cfs->get_u2_fast();
1959 const u2 index = cfs->get_u2_fast();
1960 // Assign to a u4 to avoid overflow
1961 const u4 end_pc = (u4)start_pc + (u4)length;
1962
1963 if (start_pc >= code_length) {
1964 classfile_parse_error(
1965 "Invalid start_pc %u in %s in class file %s",
1966 start_pc, tbl_name, CHECK_NULL);
1967 }
1968 if (end_pc > code_length) {
1969 classfile_parse_error(
1970 "Invalid length %u in %s in class file %s",
1971 length, tbl_name, CHECK_NULL);
1972 }
1973 const int cp_size = cp->length();
1974 guarantee_property(valid_symbol_at(name_index),
1975 "Name index %u in %s has bad constant type in class file %s",
1976 name_index, tbl_name, CHECK_NULL);
1977 guarantee_property(valid_symbol_at(descriptor_index),
1978 "Signature index %u in %s has bad constant type in class file %s",
1979 descriptor_index, tbl_name, CHECK_NULL);
1980
1981 const Symbol* const name = cp->symbol_at(name_index);
1982 const Symbol* const sig = cp->symbol_at(descriptor_index);
1983 verify_legal_field_name(name, CHECK_NULL);
1984 u2 extra_slot = 0;
1985 if (!isLVTT) {
1986 verify_legal_field_signature(name, sig, CHECK_NULL);
1987
1988 // 4894874: check special cases for double and long local variables
1989 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1990 sig == vmSymbols::type_signature(T_LONG)) {
1991 extra_slot = 1;
1992 }
1993 }
1994 guarantee_property((index + extra_slot) < max_locals,
1995 "Invalid index %u in %s in class file %s",
1996 index, tbl_name, CHECK_NULL);
1997 }
1998 }
1999 return localvariable_table_start;
2000 }
2001
2002
2003 void ClassFileParser::parse_type_array(u2 array_length,
2004 u4 code_length,
2005 u4* const u1_index,
2006 u4* const u2_index,
2007 u1* const u1_array,
2008 u2* const u2_array,
2009 TRAPS) {
2010 const ClassFileStream* const cfs = _stream;
2011 u2 index = 0; // index in the array with long/double occupying two slots
2012 u4 i1 = *u1_index;
2013 u4 i2 = *u2_index + 1;
2014 for(int i = 0; i < array_length; i++) {
2015 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
2016 index++;
2017 if (tag == ITEM_Long || tag == ITEM_Double) {
2018 index++;
2019 } else if (tag == ITEM_Object) {
2020 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
2021 guarantee_property(valid_klass_reference_at(class_index),
2022 "Bad class index %u in StackMap in class file %s",
2023 class_index, CHECK);
2024 } else if (tag == ITEM_Uninitialized) {
2025 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
2026 guarantee_property(
2027 offset < code_length,
2028 "Bad uninitialized type offset %u in StackMap in class file %s",
2029 offset, CHECK);
2030 } else {
2031 guarantee_property(
2032 tag <= (u1)ITEM_Uninitialized,
2033 "Unknown variable type %u in StackMap in class file %s",
2034 tag, CHECK);
2035 }
2036 }
2037 u2_array[*u2_index] = index;
2038 *u1_index = i1;
2039 *u2_index = i2;
2040 }
2041
2042 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
2043 u4 code_attribute_length,
2044 bool need_verify,
2045 TRAPS) {
2046 assert(cfs != NULL, "invariant");
2047
2048 if (0 == code_attribute_length) {
2049 return NULL;
2050 }
2051
2052 const u1* const stackmap_table_start = cfs->current();
2053 assert(stackmap_table_start != NULL, "null stackmap table");
2054
2055 // check code_attribute_length first
2056 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2057
2058 if (!need_verify && !DumpSharedSpaces) {
2059 return NULL;
2060 }
2061 return stackmap_table_start;
2062 }
2063
2064 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2065 u2* const checked_exceptions_length,
2066 u4 method_attribute_length,
2067 TRAPS) {
2068 assert(cfs != NULL, "invariant");
2069 assert(checked_exceptions_length != NULL, "invariant");
2070
2071 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2072 *checked_exceptions_length = cfs->get_u2_fast();
2073 const unsigned int size =
2074 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2075 const unsafe_u2* const checked_exceptions_start = cfs->current();
2076 assert(checked_exceptions_start != NULL, "null checked exceptions");
2077 if (!_need_verify) {
2078 cfs->skip_u2_fast(size);
2079 } else {
2080 // Verify each value in the checked exception table
2081 u2 checked_exception;
2082 const u2 len = *checked_exceptions_length;
2083 cfs->guarantee_more(2 * len, CHECK_NULL);
2084 for (int i = 0; i < len; i++) {
2085 checked_exception = cfs->get_u2_fast();
2086 check_property(
2087 valid_klass_reference_at(checked_exception),
2088 "Exception name has bad type at constant pool %u in class file %s",
2089 checked_exception, CHECK_NULL);
2090 }
2091 }
2092 // check exceptions attribute length
2093 if (_need_verify) {
2094 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2095 sizeof(u2) * size),
2096 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2097 }
2098 return checked_exceptions_start;
2099 }
2100
2101 void ClassFileParser::throwIllegalSignature(const char* type,
2102 const Symbol* name,
2103 const Symbol* sig,
2104 TRAPS) const {
2105 assert(name != NULL, "invariant");
2106 assert(sig != NULL, "invariant");
2107
2108 ResourceMark rm(THREAD);
2109 Exceptions::fthrow(THREAD_AND_LOCATION,
2110 vmSymbols::java_lang_ClassFormatError(),
2111 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2112 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2113 }
2114
2115 AnnotationCollector::ID
2116 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2117 const Symbol* name) {
2118 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2119 // Privileged code can use all annotations. Other code silently drops some.
2120 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2121 loader_data->is_platform_class_loader_data() ||
2122 loader_data->is_anonymous();
2123 switch (sid) {
2124 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2125 if (_location != _in_method) break; // only allow for methods
2126 if (!privileged) break; // only allow in privileged code
2127 return _method_CallerSensitive;
2128 }
2129 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2130 if (_location != _in_method) break; // only allow for methods
2131 if (!privileged) break; // only allow in privileged code
2132 return _method_ForceInline;
2133 }
2134 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2135 if (_location != _in_method) break; // only allow for methods
2136 if (!privileged) break; // only allow in privileged code
2137 return _method_DontInline;
2138 }
2139 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2140 if (_location != _in_method) break; // only allow for methods
2141 if (!privileged) break; // only allow in privileged code
2142 return _method_InjectedProfile;
2143 }
2144 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2145 if (_location != _in_method) break; // only allow for methods
2146 if (!privileged) break; // only allow in privileged code
2147 return _method_LambdaForm_Compiled;
2148 }
2149 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
2150 if (_location != _in_method) break; // only allow for methods
2151 if (!privileged) break; // only allow in privileged code
2152 return _method_LambdaForm_Hidden;
2153 }
2154 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2155 if (_location != _in_method) break; // only allow for methods
2156 if (!privileged) break; // only allow in privileged code
2157 return _method_HotSpotIntrinsicCandidate;
2158 }
2159 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2160 if (_location != _in_field) break; // only allow for fields
2161 if (!privileged) break; // only allow in privileged code
2162 return _field_Stable;
2163 }
2164 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2165 if (_location != _in_field && _location != _in_class) {
2166 break; // only allow for fields and classes
2167 }
2168 if (!EnableContended || (RestrictContended && !privileged)) {
2169 break; // honor privileges
2170 }
2171 return _jdk_internal_vm_annotation_Contended;
2172 }
2173 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2174 if (_location != _in_method) break; // only allow for methods
2175 if (RestrictReservedStack && !privileged) break; // honor privileges
2176 return _jdk_internal_vm_annotation_ReservedStackAccess;
2177 }
2178 default: {
2179 break;
2180 }
2181 }
2182 return AnnotationCollector::_unknown;
2183 }
2184
2185 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2186 if (is_contended())
2187 f->set_contended_group(contended_group());
2188 if (is_stable())
2189 f->set_stable(true);
2190 }
2191
2192 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2193 // If there's an error deallocate metadata for field annotations
2194 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2195 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2196 }
2197
2198 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2199 if (has_annotation(_method_CallerSensitive))
2200 m->set_caller_sensitive(true);
2201 if (has_annotation(_method_ForceInline))
2202 m->set_force_inline(true);
2203 if (has_annotation(_method_DontInline))
2204 m->set_dont_inline(true);
2205 if (has_annotation(_method_InjectedProfile))
2206 m->set_has_injected_profile(true);
2207 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2208 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2209 if (has_annotation(_method_LambdaForm_Hidden))
2210 m->set_hidden(true);
2211 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2212 m->set_intrinsic_candidate(true);
2213 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2214 m->set_has_reserved_stack_access(true);
2215 }
2216
2217 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2218 assert(ik != NULL, "invariant");
2219 ik->set_is_contended(is_contended());
2220 }
2221
2222 #define MAX_ARGS_SIZE 255
2223 #define MAX_CODE_SIZE 65535
2224 #define INITIAL_MAX_LVT_NUMBER 256
2225
2226 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2227 *
2228 * Rules for LVT's and LVTT's are:
2229 * - There can be any number of LVT's and LVTT's.
2230 * - If there are n LVT's, it is the same as if there was just
2231 * one LVT containing all the entries from the n LVT's.
2232 * - There may be no more than one LVT entry per local variable.
2233 * Two LVT entries are 'equal' if these fields are the same:
2234 * start_pc, length, name, slot
2235 * - There may be no more than one LVTT entry per each LVT entry.
2236 * Each LVTT entry has to match some LVT entry.
2237 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2238 */
2239 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2240 int lvt_cnt,
2241 u2* const localvariable_table_length,
2242 const unsafe_u2** const localvariable_table_start,
2243 int lvtt_cnt,
2244 u2* const localvariable_type_table_length,
2245 const unsafe_u2** const localvariable_type_table_start,
2246 TRAPS) {
2247
2248 ResourceMark rm(THREAD);
2249
2250 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2251 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2252
2253 LVT_HashTable* const table = new LVT_HashTable();
2254
2255 // To fill LocalVariableTable in
2256 const Classfile_LVT_Element* cf_lvt;
2257 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2258
2259 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2260 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2261 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2262 copy_lvt_element(&cf_lvt[idx], lvt);
2263 // If no duplicates, add LVT elem in hashtable.
2264 if (table->put(*lvt, lvt) == false
2265 && _need_verify
2266 && _major_version >= JAVA_1_5_VERSION) {
2267 classfile_parse_error("Duplicated LocalVariableTable attribute "
2268 "entry for '%s' in class file %s",
2269 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2270 CHECK);
2271 }
2272 }
2273 }
2274
2275 // To merge LocalVariableTable and LocalVariableTypeTable
2276 const Classfile_LVT_Element* cf_lvtt;
2277 LocalVariableTableElement lvtt_elem;
2278
2279 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2280 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2281 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2282 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2283 LocalVariableTableElement** entry = table->get(lvtt_elem);
2284 if (entry == NULL) {
2285 if (_need_verify) {
2286 classfile_parse_error("LVTT entry for '%s' in class file %s "
2287 "does not match any LVT entry",
2288 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2289 CHECK);
2290 }
2291 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2292 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2293 "entry for '%s' in class file %s",
2294 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2295 CHECK);
2296 } else {
2297 // to add generic signatures into LocalVariableTable
2298 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2299 }
2300 }
2301 }
2302 }
2303
2304
2305 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2306 const u1* runtime_visible_annotations,
2307 int runtime_visible_annotations_length,
2308 const u1* runtime_invisible_annotations,
2309 int runtime_invisible_annotations_length,
2310 const u1* runtime_visible_parameter_annotations,
2311 int runtime_visible_parameter_annotations_length,
2312 const u1* runtime_invisible_parameter_annotations,
2313 int runtime_invisible_parameter_annotations_length,
2314 const u1* runtime_visible_type_annotations,
2315 int runtime_visible_type_annotations_length,
2316 const u1* runtime_invisible_type_annotations,
2317 int runtime_invisible_type_annotations_length,
2318 const u1* annotation_default,
2319 int annotation_default_length,
2320 TRAPS) {
2321
2322 AnnotationArray* a;
2323
2324 if (runtime_visible_annotations_length +
2325 runtime_invisible_annotations_length > 0) {
2326 a = assemble_annotations(runtime_visible_annotations,
2327 runtime_visible_annotations_length,
2328 runtime_invisible_annotations,
2329 runtime_invisible_annotations_length,
2330 CHECK);
2331 cm->set_method_annotations(a);
2332 }
2333
2334 if (runtime_visible_parameter_annotations_length +
2335 runtime_invisible_parameter_annotations_length > 0) {
2336 a = assemble_annotations(runtime_visible_parameter_annotations,
2337 runtime_visible_parameter_annotations_length,
2338 runtime_invisible_parameter_annotations,
2339 runtime_invisible_parameter_annotations_length,
2340 CHECK);
2341 cm->set_parameter_annotations(a);
2342 }
2343
2344 if (annotation_default_length > 0) {
2345 a = assemble_annotations(annotation_default,
2346 annotation_default_length,
2347 NULL,
2348 0,
2349 CHECK);
2350 cm->set_default_annotations(a);
2351 }
2352
2353 if (runtime_visible_type_annotations_length +
2354 runtime_invisible_type_annotations_length > 0) {
2355 a = assemble_annotations(runtime_visible_type_annotations,
2356 runtime_visible_type_annotations_length,
2357 runtime_invisible_type_annotations,
2358 runtime_invisible_type_annotations_length,
2359 CHECK);
2360 cm->set_type_annotations(a);
2361 }
2362 }
2363
2364
2365 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2366 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2367 // Method* to save footprint, so we only know the size of the resulting Method* when the
2368 // entire method attribute is parsed.
2369 //
2370 // The promoted_flags parameter is used to pass relevant access_flags
2371 // from the method back up to the containing klass. These flag values
2372 // are added to klass's access_flags.
2373
2374 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2375 bool is_interface,
2376 const ConstantPool* cp,
2377 AccessFlags* const promoted_flags,
2378 TRAPS) {
2379 assert(cfs != NULL, "invariant");
2380 assert(cp != NULL, "invariant");
2381 assert(promoted_flags != NULL, "invariant");
2382
2383 ResourceMark rm(THREAD);
2384 // Parse fixed parts:
2385 // access_flags, name_index, descriptor_index, attributes_count
2386 cfs->guarantee_more(8, CHECK_NULL);
2387
2388 int flags = cfs->get_u2_fast();
2389 const u2 name_index = cfs->get_u2_fast();
2390 const int cp_size = cp->length();
2391 check_property(
2392 valid_symbol_at(name_index),
2393 "Illegal constant pool index %u for method name in class file %s",
2394 name_index, CHECK_NULL);
2395 const Symbol* const name = cp->symbol_at(name_index);
2396 verify_legal_method_name(name, CHECK_NULL);
2397
2398 const u2 signature_index = cfs->get_u2_fast();
2399 guarantee_property(
2400 valid_symbol_at(signature_index),
2401 "Illegal constant pool index %u for method signature in class file %s",
2402 signature_index, CHECK_NULL);
2403 const Symbol* const signature = cp->symbol_at(signature_index);
2404
2405 if (name == vmSymbols::class_initializer_name()) {
2406 // We ignore the other access flags for a valid class initializer.
2407 // (JVM Spec 2nd ed., chapter 4.6)
2408 if (_major_version < 51) { // backward compatibility
2409 flags = JVM_ACC_STATIC;
2410 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2411 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2412 } else {
2413 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2414 }
2415 } else {
2416 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2417 }
2418
2419 if (name == vmSymbols::object_initializer_name() && is_interface) {
2420 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2421 }
2422
2423 int args_size = -1; // only used when _need_verify is true
2424 if (_need_verify) {
2425 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2426 verify_legal_method_signature(name, signature, CHECK_NULL);
2427 if (args_size > MAX_ARGS_SIZE) {
2428 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2429 }
2430 }
2431
2432 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2433
2434 // Default values for code and exceptions attribute elements
2435 u2 max_stack = 0;
2436 u2 max_locals = 0;
2437 u4 code_length = 0;
2438 const u1* code_start = 0;
2439 u2 exception_table_length = 0;
2440 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2441 Array<int>* exception_handlers = Universe::the_empty_int_array();
2442 u2 checked_exceptions_length = 0;
2443 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2444 CompressedLineNumberWriteStream* linenumber_table = NULL;
2445 int linenumber_table_length = 0;
2446 int total_lvt_length = 0;
2447 u2 lvt_cnt = 0;
2448 u2 lvtt_cnt = 0;
2449 bool lvt_allocated = false;
2450 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2451 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2452 u2* localvariable_table_length = NULL;
2453 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2454 u2* localvariable_type_table_length = NULL;
2455 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2456 int method_parameters_length = -1;
2457 const u1* method_parameters_data = NULL;
2458 bool method_parameters_seen = false;
2459 bool parsed_code_attribute = false;
2460 bool parsed_checked_exceptions_attribute = false;
2461 bool parsed_stackmap_attribute = false;
2462 // stackmap attribute - JDK1.5
2463 const u1* stackmap_data = NULL;
2464 int stackmap_data_length = 0;
2465 u2 generic_signature_index = 0;
2466 MethodAnnotationCollector parsed_annotations;
2467 const u1* runtime_visible_annotations = NULL;
2468 int runtime_visible_annotations_length = 0;
2469 const u1* runtime_invisible_annotations = NULL;
2470 int runtime_invisible_annotations_length = 0;
2471 const u1* runtime_visible_parameter_annotations = NULL;
2472 int runtime_visible_parameter_annotations_length = 0;
2473 const u1* runtime_invisible_parameter_annotations = NULL;
2474 int runtime_invisible_parameter_annotations_length = 0;
2475 const u1* runtime_visible_type_annotations = NULL;
2476 int runtime_visible_type_annotations_length = 0;
2477 const u1* runtime_invisible_type_annotations = NULL;
2478 int runtime_invisible_type_annotations_length = 0;
2479 bool runtime_invisible_annotations_exists = false;
2480 bool runtime_invisible_type_annotations_exists = false;
2481 bool runtime_invisible_parameter_annotations_exists = false;
2482 const u1* annotation_default = NULL;
2483 int annotation_default_length = 0;
2484
2485 // Parse code and exceptions attribute
2486 u2 method_attributes_count = cfs->get_u2_fast();
2487 while (method_attributes_count--) {
2488 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2489 const u2 method_attribute_name_index = cfs->get_u2_fast();
2490 const u4 method_attribute_length = cfs->get_u4_fast();
2491 check_property(
2492 valid_symbol_at(method_attribute_name_index),
2493 "Invalid method attribute name index %u in class file %s",
2494 method_attribute_name_index, CHECK_NULL);
2495
2496 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2497 if (method_attribute_name == vmSymbols::tag_code()) {
2498 // Parse Code attribute
2499 if (_need_verify) {
2500 guarantee_property(
2501 !access_flags.is_native() && !access_flags.is_abstract(),
2502 "Code attribute in native or abstract methods in class file %s",
2503 CHECK_NULL);
2504 }
2505 if (parsed_code_attribute) {
2506 classfile_parse_error("Multiple Code attributes in class file %s",
2507 CHECK_NULL);
2508 }
2509 parsed_code_attribute = true;
2510
2511 // Stack size, locals size, and code size
2512 if (_major_version == 45 && _minor_version <= 2) {
2513 cfs->guarantee_more(4, CHECK_NULL);
2514 max_stack = cfs->get_u1_fast();
2515 max_locals = cfs->get_u1_fast();
2516 code_length = cfs->get_u2_fast();
2517 } else {
2518 cfs->guarantee_more(8, CHECK_NULL);
2519 max_stack = cfs->get_u2_fast();
2520 max_locals = cfs->get_u2_fast();
2521 code_length = cfs->get_u4_fast();
2522 }
2523 if (_need_verify) {
2524 guarantee_property(args_size <= max_locals,
2525 "Arguments can't fit into locals in class file %s",
2526 CHECK_NULL);
2527 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2528 "Invalid method Code length %u in class file %s",
2529 code_length, CHECK_NULL);
2530 }
2531 // Code pointer
2532 code_start = cfs->current();
2533 assert(code_start != NULL, "null code start");
2534 cfs->guarantee_more(code_length, CHECK_NULL);
2535 cfs->skip_u1_fast(code_length);
2536
2537 // Exception handler table
2538 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2539 exception_table_length = cfs->get_u2_fast();
2540 if (exception_table_length > 0) {
2541 exception_table_start = parse_exception_table(cfs,
2542 code_length,
2543 exception_table_length,
2544 CHECK_NULL);
2545 }
2546
2547 // Parse additional attributes in code attribute
2548 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2549 u2 code_attributes_count = cfs->get_u2_fast();
2550
2551 unsigned int calculated_attribute_length = 0;
2552
2553 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2554 calculated_attribute_length =
2555 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2556 } else {
2557 // max_stack, locals and length are smaller in pre-version 45.2 classes
2558 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2559 }
2560 calculated_attribute_length +=
2561 code_length +
2562 sizeof(exception_table_length) +
2563 sizeof(code_attributes_count) +
2564 exception_table_length *
2565 ( sizeof(u2) + // start_pc
2566 sizeof(u2) + // end_pc
2567 sizeof(u2) + // handler_pc
2568 sizeof(u2) ); // catch_type_index
2569
2570 while (code_attributes_count--) {
2571 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2572 const u2 code_attribute_name_index = cfs->get_u2_fast();
2573 const u4 code_attribute_length = cfs->get_u4_fast();
2574 calculated_attribute_length += code_attribute_length +
2575 sizeof(code_attribute_name_index) +
2576 sizeof(code_attribute_length);
2577 check_property(valid_symbol_at(code_attribute_name_index),
2578 "Invalid code attribute name index %u in class file %s",
2579 code_attribute_name_index,
2580 CHECK_NULL);
2581 if (LoadLineNumberTables &&
2582 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2583 // Parse and compress line number table
2584 parse_linenumber_table(code_attribute_length,
2585 code_length,
2586 &linenumber_table,
2587 CHECK_NULL);
2588
2589 } else if (LoadLocalVariableTables &&
2590 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2591 // Parse local variable table
2592 if (!lvt_allocated) {
2593 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2594 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2595 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2596 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2597 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2598 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2599 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2600 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2601 lvt_allocated = true;
2602 }
2603 if (lvt_cnt == max_lvt_cnt) {
2604 max_lvt_cnt <<= 1;
2605 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2606 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2607 }
2608 localvariable_table_start[lvt_cnt] =
2609 parse_localvariable_table(cfs,
2610 code_length,
2611 max_locals,
2612 code_attribute_length,
2613 &localvariable_table_length[lvt_cnt],
2614 false, // is not LVTT
2615 CHECK_NULL);
2616 total_lvt_length += localvariable_table_length[lvt_cnt];
2617 lvt_cnt++;
2618 } else if (LoadLocalVariableTypeTables &&
2619 _major_version >= JAVA_1_5_VERSION &&
2620 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2621 if (!lvt_allocated) {
2622 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2623 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2624 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2625 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2626 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2627 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2628 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2629 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2630 lvt_allocated = true;
2631 }
2632 // Parse local variable type table
2633 if (lvtt_cnt == max_lvtt_cnt) {
2634 max_lvtt_cnt <<= 1;
2635 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2636 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2637 }
2638 localvariable_type_table_start[lvtt_cnt] =
2639 parse_localvariable_table(cfs,
2640 code_length,
2641 max_locals,
2642 code_attribute_length,
2643 &localvariable_type_table_length[lvtt_cnt],
2644 true, // is LVTT
2645 CHECK_NULL);
2646 lvtt_cnt++;
2647 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2648 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2649 // Stack map is only needed by the new verifier in JDK1.5.
2650 if (parsed_stackmap_attribute) {
2651 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2652 }
2653 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2654 stackmap_data_length = code_attribute_length;
2655 parsed_stackmap_attribute = true;
2656 } else {
2657 // Skip unknown attributes
2658 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2659 }
2660 }
2661 // check method attribute length
2662 if (_need_verify) {
2663 guarantee_property(method_attribute_length == calculated_attribute_length,
2664 "Code segment has wrong length in class file %s",
2665 CHECK_NULL);
2666 }
2667 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2668 // Parse Exceptions attribute
2669 if (parsed_checked_exceptions_attribute) {
2670 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2671 CHECK_NULL);
2672 }
2673 parsed_checked_exceptions_attribute = true;
2674 checked_exceptions_start =
2675 parse_checked_exceptions(cfs,
2676 &checked_exceptions_length,
2677 method_attribute_length,
2678 CHECK_NULL);
2679 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2680 // reject multiple method parameters
2681 if (method_parameters_seen) {
2682 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2683 CHECK_NULL);
2684 }
2685 method_parameters_seen = true;
2686 method_parameters_length = cfs->get_u1_fast();
2687 const u2 real_length = (method_parameters_length * 4u) + 1u;
2688 if (method_attribute_length != real_length) {
2689 classfile_parse_error(
2690 "Invalid MethodParameters method attribute length %u in class file",
2691 method_attribute_length, CHECK_NULL);
2692 }
2693 method_parameters_data = cfs->current();
2694 cfs->skip_u2_fast(method_parameters_length);
2695 cfs->skip_u2_fast(method_parameters_length);
2696 // ignore this attribute if it cannot be reflected
2697 if (!SystemDictionary::Parameter_klass_loaded())
2698 method_parameters_length = -1;
2699 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2700 if (method_attribute_length != 0) {
2701 classfile_parse_error(
2702 "Invalid Synthetic method attribute length %u in class file %s",
2703 method_attribute_length, CHECK_NULL);
2704 }
2705 // Should we check that there hasn't already been a synthetic attribute?
2706 access_flags.set_is_synthetic();
2707 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2708 if (method_attribute_length != 0) {
2709 classfile_parse_error(
2710 "Invalid Deprecated method attribute length %u in class file %s",
2711 method_attribute_length, CHECK_NULL);
2712 }
2713 } else if (_major_version >= JAVA_1_5_VERSION) {
2714 if (method_attribute_name == vmSymbols::tag_signature()) {
2715 if (generic_signature_index != 0) {
2716 classfile_parse_error(
2717 "Multiple Signature attributes for method in class file %s",
2718 CHECK_NULL);
2719 }
2720 if (method_attribute_length != 2) {
2721 classfile_parse_error(
2722 "Invalid Signature attribute length %u in class file %s",
2723 method_attribute_length, CHECK_NULL);
2724 }
2725 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2726 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2727 if (runtime_visible_annotations != NULL) {
2728 classfile_parse_error(
2729 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2730 CHECK_NULL);
2731 }
2732 runtime_visible_annotations_length = method_attribute_length;
2733 runtime_visible_annotations = cfs->current();
2734 assert(runtime_visible_annotations != NULL, "null visible annotations");
2735 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2736 parse_annotations(cp,
2737 runtime_visible_annotations,
2738 runtime_visible_annotations_length,
2739 &parsed_annotations,
2740 _loader_data,
2741 CHECK_NULL);
2742 cfs->skip_u1_fast(runtime_visible_annotations_length);
2743 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2744 if (runtime_invisible_annotations_exists) {
2745 classfile_parse_error(
2746 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2747 CHECK_NULL);
2748 }
2749 runtime_invisible_annotations_exists = true;
2750 if (PreserveAllAnnotations) {
2751 runtime_invisible_annotations_length = method_attribute_length;
2752 runtime_invisible_annotations = cfs->current();
2753 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2754 }
2755 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2756 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2757 if (runtime_visible_parameter_annotations != NULL) {
2758 classfile_parse_error(
2759 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2760 CHECK_NULL);
2761 }
2762 runtime_visible_parameter_annotations_length = method_attribute_length;
2763 runtime_visible_parameter_annotations = cfs->current();
2764 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2765 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2766 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2767 if (runtime_invisible_parameter_annotations_exists) {
2768 classfile_parse_error(
2769 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2770 CHECK_NULL);
2771 }
2772 runtime_invisible_parameter_annotations_exists = true;
2773 if (PreserveAllAnnotations) {
2774 runtime_invisible_parameter_annotations_length = method_attribute_length;
2775 runtime_invisible_parameter_annotations = cfs->current();
2776 assert(runtime_invisible_parameter_annotations != NULL,
2777 "null invisible parameter annotations");
2778 }
2779 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2780 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2781 if (annotation_default != NULL) {
2782 classfile_parse_error(
2783 "Multiple AnnotationDefault attributes for method in class file %s",
2784 CHECK_NULL);
2785 }
2786 annotation_default_length = method_attribute_length;
2787 annotation_default = cfs->current();
2788 assert(annotation_default != NULL, "null annotation default");
2789 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2790 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2791 if (runtime_visible_type_annotations != NULL) {
2792 classfile_parse_error(
2793 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2794 CHECK_NULL);
2795 }
2796 runtime_visible_type_annotations_length = method_attribute_length;
2797 runtime_visible_type_annotations = cfs->current();
2798 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2799 // No need for the VM to parse Type annotations
2800 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2801 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2802 if (runtime_invisible_type_annotations_exists) {
2803 classfile_parse_error(
2804 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2805 CHECK_NULL);
2806 } else {
2807 runtime_invisible_type_annotations_exists = true;
2808 }
2809 if (PreserveAllAnnotations) {
2810 runtime_invisible_type_annotations_length = method_attribute_length;
2811 runtime_invisible_type_annotations = cfs->current();
2812 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2813 }
2814 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2815 } else {
2816 // Skip unknown attributes
2817 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2818 }
2819 } else {
2820 // Skip unknown attributes
2821 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2822 }
2823 }
2824
2825 if (linenumber_table != NULL) {
2826 linenumber_table->write_terminator();
2827 linenumber_table_length = linenumber_table->position();
2828 }
2829
2830 // Make sure there's at least one Code attribute in non-native/non-abstract method
2831 if (_need_verify) {
2832 guarantee_property(access_flags.is_native() ||
2833 access_flags.is_abstract() ||
2834 parsed_code_attribute,
2835 "Absent Code attribute in method that is not native or abstract in class file %s",
2836 CHECK_NULL);
2837 }
2838
2839 // All sizing information for a Method* is finally available, now create it
2840 InlineTableSizes sizes(
2841 total_lvt_length,
2842 linenumber_table_length,
2843 exception_table_length,
2844 checked_exceptions_length,
2845 method_parameters_length,
2846 generic_signature_index,
2847 runtime_visible_annotations_length +
2848 runtime_invisible_annotations_length,
2849 runtime_visible_parameter_annotations_length +
2850 runtime_invisible_parameter_annotations_length,
2851 runtime_visible_type_annotations_length +
2852 runtime_invisible_type_annotations_length,
2853 annotation_default_length,
2854 0);
2855
2856 Method* const m = Method::allocate(_loader_data,
2857 code_length,
2858 access_flags,
2859 &sizes,
2860 ConstMethod::NORMAL,
2861 CHECK_NULL);
2862
2863 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2864
2865 // Fill in information from fixed part (access_flags already set)
2866 m->set_constants(_cp);
2867 m->set_name_index(name_index);
2868 m->set_signature_index(signature_index);
2869
2870 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2871 m->constMethod()->set_result_type(rtf.type());
2872
2873 if (args_size >= 0) {
2874 m->set_size_of_parameters(args_size);
2875 } else {
2876 m->compute_size_of_parameters(THREAD);
2877 }
2878 #ifdef ASSERT
2879 if (args_size >= 0) {
2880 m->compute_size_of_parameters(THREAD);
2881 assert(args_size == m->size_of_parameters(), "");
2882 }
2883 #endif
2884
2885 // Fill in code attribute information
2886 m->set_max_stack(max_stack);
2887 m->set_max_locals(max_locals);
2888 if (stackmap_data != NULL) {
2889 m->constMethod()->copy_stackmap_data(_loader_data,
2890 (u1*)stackmap_data,
2891 stackmap_data_length,
2892 CHECK_NULL);
2893 }
2894
2895 // Copy byte codes
2896 m->set_code((u1*)code_start);
2897
2898 // Copy line number table
2899 if (linenumber_table != NULL) {
2900 memcpy(m->compressed_linenumber_table(),
2901 linenumber_table->buffer(),
2902 linenumber_table_length);
2903 }
2904
2905 // Copy exception table
2906 if (exception_table_length > 0) {
2907 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2908 m->exception_table_start(),
2909 exception_table_length * sizeof(ExceptionTableElement),
2910 sizeof(u2));
2911 }
2912
2913 // Copy method parameters
2914 if (method_parameters_length > 0) {
2915 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2916 for (int i = 0; i < method_parameters_length; i++) {
2917 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2918 method_parameters_data += 2;
2919 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2920 method_parameters_data += 2;
2921 }
2922 }
2923
2924 // Copy checked exceptions
2925 if (checked_exceptions_length > 0) {
2926 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2927 m->checked_exceptions_start(),
2928 checked_exceptions_length * sizeof(CheckedExceptionElement),
2929 sizeof(u2));
2930 }
2931
2932 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2933 if (total_lvt_length > 0) {
2934 promoted_flags->set_has_localvariable_table();
2935 copy_localvariable_table(m->constMethod(),
2936 lvt_cnt,
2937 localvariable_table_length,
2938 localvariable_table_start,
2939 lvtt_cnt,
2940 localvariable_type_table_length,
2941 localvariable_type_table_start,
2942 CHECK_NULL);
2943 }
2944
2945 if (parsed_annotations.has_any_annotations())
2946 parsed_annotations.apply_to(m);
2947
2948 // Copy annotations
2949 copy_method_annotations(m->constMethod(),
2950 runtime_visible_annotations,
2951 runtime_visible_annotations_length,
2952 runtime_invisible_annotations,
2953 runtime_invisible_annotations_length,
2954 runtime_visible_parameter_annotations,
2955 runtime_visible_parameter_annotations_length,
2956 runtime_invisible_parameter_annotations,
2957 runtime_invisible_parameter_annotations_length,
2958 runtime_visible_type_annotations,
2959 runtime_visible_type_annotations_length,
2960 runtime_invisible_type_annotations,
2961 runtime_invisible_type_annotations_length,
2962 annotation_default,
2963 annotation_default_length,
2964 CHECK_NULL);
2965
2966 if (name == vmSymbols::finalize_method_name() &&
2967 signature == vmSymbols::void_method_signature()) {
2968 if (m->is_empty_method()) {
2969 _has_empty_finalizer = true;
2970 } else {
2971 _has_finalizer = true;
2972 }
2973 }
2974 if (name == vmSymbols::object_initializer_name() &&
2975 signature == vmSymbols::void_method_signature() &&
2976 m->is_vanilla_constructor()) {
2977 _has_vanilla_constructor = true;
2978 }
2979
2980 NOT_PRODUCT(m->verify());
2981 return m;
2982 }
2983
2984
2985 // The promoted_flags parameter is used to pass relevant access_flags
2986 // from the methods back up to the containing klass. These flag values
2987 // are added to klass's access_flags.
2988 // Side-effects: populates the _methods field in the parser
2989 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2990 bool is_interface,
2991 AccessFlags* promoted_flags,
2992 bool* has_final_method,
2993 bool* declares_nonstatic_concrete_methods,
2994 TRAPS) {
2995 assert(cfs != NULL, "invariant");
2996 assert(promoted_flags != NULL, "invariant");
2997 assert(has_final_method != NULL, "invariant");
2998 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2999
3000 assert(NULL == _methods, "invariant");
3001
3002 cfs->guarantee_more(2, CHECK); // length
3003 const u2 length = cfs->get_u2_fast();
3004 if (length == 0) {
3005 _methods = Universe::the_empty_method_array();
3006 } else {
3007 _methods = MetadataFactory::new_array<Method*>(_loader_data,
3008 length,
3009 NULL,
3010 CHECK);
3011
3012 for (int index = 0; index < length; index++) {
3013 Method* method = parse_method(cfs,
3014 is_interface,
3015 _cp,
3016 promoted_flags,
3017 CHECK);
3018
3019 if (method->is_final()) {
3020 *has_final_method = true;
3021 }
3022 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
3023 // used for interface initialization, and default method inheritance analysis
3024 if (is_interface && !(*declares_nonstatic_concrete_methods)
3025 && !method->is_abstract() && !method->is_static()) {
3026 *declares_nonstatic_concrete_methods = true;
3027 }
3028 _methods->at_put(index, method);
3029 }
3030
3031 if (_need_verify && length > 1) {
3032 // Check duplicated methods
3033 ResourceMark rm(THREAD);
3034 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
3035 THREAD, NameSigHash*, HASH_ROW_SIZE);
3036 initialize_hashtable(names_and_sigs);
3037 bool dup = false;
3038 const Symbol* name = NULL;
3039 const Symbol* sig = NULL;
3040 {
3041 debug_only(NoSafepointVerifier nsv;)
3042 for (int i = 0; i < length; i++) {
3043 const Method* const m = _methods->at(i);
3044 name = m->name();
3045 sig = m->signature();
3046 // If no duplicates, add name/signature in hashtable names_and_sigs.
3047 if (!put_after_lookup(name, sig, names_and_sigs)) {
3048 dup = true;
3049 break;
3050 }
3051 }
3052 }
3053 if (dup) {
3054 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
3055 name->as_C_string(), sig->as_klass_external_name(), CHECK);
3056 }
3057 }
3058 }
3059 }
3060
3061 static const intArray* sort_methods(Array<Method*>* methods) {
3062 const int length = methods->length();
3063 // If JVMTI original method ordering or sharing is enabled we have to
3064 // remember the original class file ordering.
3065 // We temporarily use the vtable_index field in the Method* to store the
3066 // class file index, so we can read in after calling qsort.
3067 // Put the method ordering in the shared archive.
3068 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3069 for (int index = 0; index < length; index++) {
3070 Method* const m = methods->at(index);
3071 assert(!m->valid_vtable_index(), "vtable index should not be set");
3072 m->set_vtable_index(index);
3073 }
3074 }
3075 // Sort method array by ascending method name (for faster lookups & vtable construction)
3076 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3077 Method::sort_methods(methods);
3078
3079 intArray* method_ordering = NULL;
3080 // If JVMTI original method ordering or sharing is enabled construct int
3081 // array remembering the original ordering
3082 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3083 method_ordering = new intArray(length, length, -1);
3084 for (int index = 0; index < length; index++) {
3085 Method* const m = methods->at(index);
3086 const int old_index = m->vtable_index();
3087 assert(old_index >= 0 && old_index < length, "invalid method index");
3088 method_ordering->at_put(index, old_index);
3089 m->set_vtable_index(Method::invalid_vtable_index);
3090 }
3091 }
3092 return method_ordering;
3093 }
3094
3095 // Parse generic_signature attribute for methods and fields
3096 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3097 TRAPS) {
3098 assert(cfs != NULL, "invariant");
3099
3100 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3101 const u2 generic_signature_index = cfs->get_u2_fast();
3102 check_property(
3103 valid_symbol_at(generic_signature_index),
3104 "Invalid Signature attribute at constant pool index %u in class file %s",
3105 generic_signature_index, CHECK_0);
3106 return generic_signature_index;
3107 }
3108
3109 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3110 TRAPS) {
3111
3112 assert(cfs != NULL, "invariant");
3113
3114 cfs->guarantee_more(2, CHECK); // sourcefile_index
3115 const u2 sourcefile_index = cfs->get_u2_fast();
3116 check_property(
3117 valid_symbol_at(sourcefile_index),
3118 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3119 sourcefile_index, CHECK);
3120 set_class_sourcefile_index(sourcefile_index);
3121 }
3122
3123 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3124 int length,
3125 TRAPS) {
3126 assert(cfs != NULL, "invariant");
3127
3128 const u1* const sde_buffer = cfs->current();
3129 assert(sde_buffer != NULL, "null sde buffer");
3130
3131 // Don't bother storing it if there is no way to retrieve it
3132 if (JvmtiExport::can_get_source_debug_extension()) {
3133 assert((length+1) > length, "Overflow checking");
3134 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3135 for (int i = 0; i < length; i++) {
3136 sde[i] = sde_buffer[i];
3137 }
3138 sde[length] = '\0';
3139 set_class_sde_buffer((const char*)sde, length);
3140 }
3141 // Got utf8 string, set stream position forward
3142 cfs->skip_u1(length, CHECK);
3143 }
3144
3145
3146 // Inner classes can be static, private or protected (classic VM does this)
3147 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3148 JVM_ACC_PRIVATE | \
3149 JVM_ACC_PROTECTED | \
3150 JVM_ACC_STATIC \
3151 )
3152
3153 // Return number of classes in the inner classes attribute table
3154 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3155 const u1* const inner_classes_attribute_start,
3156 bool parsed_enclosingmethod_attribute,
3157 u2 enclosing_method_class_index,
3158 u2 enclosing_method_method_index,
3159 TRAPS) {
3160 const u1* const current_mark = cfs->current();
3161 u2 length = 0;
3162 if (inner_classes_attribute_start != NULL) {
3163 cfs->set_current(inner_classes_attribute_start);
3164 cfs->guarantee_more(2, CHECK_0); // length
3165 length = cfs->get_u2_fast();
3166 }
3167
3168 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3169 // method data:
3170 // [inner_class_info_index,
3171 // outer_class_info_index,
3172 // inner_name_index,
3173 // inner_class_access_flags,
3174 // ...
3175 // enclosing_method_class_index,
3176 // enclosing_method_method_index]
3177 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3178 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3179 _inner_classes = inner_classes;
3180
3181 int index = 0;
3182 const int cp_size = _cp->length();
3183 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3184 for (int n = 0; n < length; n++) {
3185 // Inner class index
3186 const u2 inner_class_info_index = cfs->get_u2_fast();
3187 check_property(
3188 (valid_klass_reference_at(inner_class_info_index) ||
3189 (EnableValhalla && valid_value_type_reference_at(inner_class_info_index))),
3190 "inner_class_info_index %u has bad constant type in class file %s",
3191 inner_class_info_index, CHECK_0);
3192 // Outer class index
3193 const u2 outer_class_info_index = cfs->get_u2_fast();
3194 check_property(
3195 outer_class_info_index == 0 ||
3196 (valid_klass_reference_at(outer_class_info_index) ||
3197 (EnableValhalla && valid_value_type_reference_at(outer_class_info_index))),
3198 "outer_class_info_index %u has bad constant type in class file %s",
3199 outer_class_info_index, CHECK_0);
3200 // Inner class name
3201 const u2 inner_name_index = cfs->get_u2_fast();
3202 check_property(
3203 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3204 "inner_name_index %u has bad constant type in class file %s",
3205 inner_name_index, CHECK_0);
3206 if (_need_verify) {
3207 guarantee_property(inner_class_info_index != outer_class_info_index,
3208 "Class is both outer and inner class in class file %s", CHECK_0);
3209 }
3210
3211 jint recognized_modifiers = RECOGNIZED_INNER_CLASS_MODIFIERS;
3212 // JVM_ACC_MODULE is defined in JDK-9 and later.
3213 if (_major_version >= JAVA_9_VERSION) {
3214 recognized_modifiers |= JVM_ACC_MODULE;
3215 }
3216 // JVM_ACC_VALUE is defined for class file version 53.1 and later
3217 if (supports_value_types()) {
3218 recognized_modifiers |= JVM_ACC_VALUE;
3219 }
3220
3221 // Access flags
3222 jint flags = cfs->get_u2_fast() & recognized_modifiers;
3223
3224 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3225 // Set abstract bit for old class files for backward compatibility
3226 flags |= JVM_ACC_ABSTRACT;
3227 }
3228 verify_legal_class_modifiers(flags, CHECK_0);
3229 AccessFlags inner_access_flags(flags);
3230
3231 inner_classes->at_put(index++, inner_class_info_index);
3232 inner_classes->at_put(index++, outer_class_info_index);
3233 inner_classes->at_put(index++, inner_name_index);
3234 inner_classes->at_put(index++, inner_access_flags.as_short());
3235 }
3236
3237 // 4347400: make sure there's no duplicate entry in the classes array
3238 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3239 for(int i = 0; i < length * 4; i += 4) {
3240 for(int j = i + 4; j < length * 4; j += 4) {
3241 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3242 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3243 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3244 inner_classes->at(i+3) != inner_classes->at(j+3)),
3245 "Duplicate entry in InnerClasses in class file %s",
3246 CHECK_0);
3247 }
3248 }
3249 }
3250
3251 // Set EnclosingMethod class and method indexes.
3252 if (parsed_enclosingmethod_attribute) {
3253 inner_classes->at_put(index++, enclosing_method_class_index);
3254 inner_classes->at_put(index++, enclosing_method_method_index);
3255 }
3256 assert(index == size, "wrong size");
3257
3258 // Restore buffer's current position.
3259 cfs->set_current(current_mark);
3260
3261 return length;
3262 }
3263
3264 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3265 set_class_synthetic_flag(true);
3266 }
3267
3268 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3269 assert(cfs != NULL, "invariant");
3270
3271 const u2 signature_index = cfs->get_u2(CHECK);
3272 check_property(
3273 valid_symbol_at(signature_index),
3274 "Invalid constant pool index %u in Signature attribute in class file %s",
3275 signature_index, CHECK);
3276 set_class_generic_signature_index(signature_index);
3277 }
3278
3279 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3280 ConstantPool* cp,
3281 u4 attribute_byte_length,
3282 TRAPS) {
3283 assert(cfs != NULL, "invariant");
3284 assert(cp != NULL, "invariant");
3285
3286 const u1* const current_start = cfs->current();
3287
3288 guarantee_property(attribute_byte_length >= sizeof(u2),
3289 "Invalid BootstrapMethods attribute length %u in class file %s",
3290 attribute_byte_length,
3291 CHECK);
3292
3293 cfs->guarantee_more(attribute_byte_length, CHECK);
3294
3295 const int attribute_array_length = cfs->get_u2_fast();
3296
3297 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3298 "Short length on BootstrapMethods in class file %s",
3299 CHECK);
3300
3301
3302 // The attribute contains a counted array of counted tuples of shorts,
3303 // represending bootstrap specifiers:
3304 // length*{bootstrap_method_index, argument_count*{argument_index}}
3305 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3306 // operand_count = number of shorts in attr, except for leading length
3307
3308 // The attribute is copied into a short[] array.
3309 // The array begins with a series of short[2] pairs, one for each tuple.
3310 const int index_size = (attribute_array_length * 2);
3311
3312 Array<u2>* const operands =
3313 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3314
3315 // Eagerly assign operands so they will be deallocated with the constant
3316 // pool if there is an error.
3317 cp->set_operands(operands);
3318
3319 int operand_fill_index = index_size;
3320 const int cp_size = cp->length();
3321
3322 for (int n = 0; n < attribute_array_length; n++) {
3323 // Store a 32-bit offset into the header of the operand array.
3324 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3325
3326 // Read a bootstrap specifier.
3327 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3328 const u2 bootstrap_method_index = cfs->get_u2_fast();
3329 const u2 argument_count = cfs->get_u2_fast();
3330 check_property(
3331 valid_cp_range(bootstrap_method_index, cp_size) &&
3332 cp->tag_at(bootstrap_method_index).is_method_handle(),
3333 "bootstrap_method_index %u has bad constant type in class file %s",
3334 bootstrap_method_index,
3335 CHECK);
3336
3337 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3338 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3339 CHECK);
3340
3341 operands->at_put(operand_fill_index++, bootstrap_method_index);
3342 operands->at_put(operand_fill_index++, argument_count);
3343
3344 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3345 for (int j = 0; j < argument_count; j++) {
3346 const u2 argument_index = cfs->get_u2_fast();
3347 check_property(
3348 valid_cp_range(argument_index, cp_size) &&
3349 cp->tag_at(argument_index).is_loadable_constant(),
3350 "argument_index %u has bad constant type in class file %s",
3351 argument_index,
3352 CHECK);
3353 operands->at_put(operand_fill_index++, argument_index);
3354 }
3355 }
3356 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3357 "Bad length on BootstrapMethods in class file %s",
3358 CHECK);
3359 }
3360
3361 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3362 ConstantPool* cp,
3363 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3364 TRAPS) {
3365 assert(cfs != NULL, "invariant");
3366 assert(cp != NULL, "invariant");
3367 assert(parsed_annotations != NULL, "invariant");
3368
3369 // Set inner classes attribute to default sentinel
3370 _inner_classes = Universe::the_empty_short_array();
3371 cfs->guarantee_more(2, CHECK); // attributes_count
3372 u2 attributes_count = cfs->get_u2_fast();
3373 bool parsed_sourcefile_attribute = false;
3374 bool parsed_innerclasses_attribute = false;
3375 bool parsed_enclosingmethod_attribute = false;
3376 bool parsed_bootstrap_methods_attribute = false;
3377 const u1* runtime_visible_annotations = NULL;
3378 int runtime_visible_annotations_length = 0;
3379 const u1* runtime_invisible_annotations = NULL;
3380 int runtime_invisible_annotations_length = 0;
3381 const u1* runtime_visible_type_annotations = NULL;
3382 int runtime_visible_type_annotations_length = 0;
3383 const u1* runtime_invisible_type_annotations = NULL;
3384 int runtime_invisible_type_annotations_length = 0;
3385 bool runtime_invisible_type_annotations_exists = false;
3386 bool runtime_invisible_annotations_exists = false;
3387 bool parsed_source_debug_ext_annotations_exist = false;
3388 const u1* inner_classes_attribute_start = NULL;
3389 u4 inner_classes_attribute_length = 0;
3390 u2 enclosing_method_class_index = 0;
3391 u2 enclosing_method_method_index = 0;
3392 // Iterate over attributes
3393 while (attributes_count--) {
3394 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3395 const u2 attribute_name_index = cfs->get_u2_fast();
3396 const u4 attribute_length = cfs->get_u4_fast();
3397 check_property(
3398 valid_symbol_at(attribute_name_index),
3399 "Attribute name has bad constant pool index %u in class file %s",
3400 attribute_name_index, CHECK);
3401 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3402 if (tag == vmSymbols::tag_source_file()) {
3403 // Check for SourceFile tag
3404 if (_need_verify) {
3405 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3406 }
3407 if (parsed_sourcefile_attribute) {
3408 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3409 } else {
3410 parsed_sourcefile_attribute = true;
3411 }
3412 parse_classfile_sourcefile_attribute(cfs, CHECK);
3413 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3414 // Check for SourceDebugExtension tag
3415 if (parsed_source_debug_ext_annotations_exist) {
3416 classfile_parse_error(
3417 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3418 }
3419 parsed_source_debug_ext_annotations_exist = true;
3420 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3421 } else if (tag == vmSymbols::tag_inner_classes()) {
3422 // Check for InnerClasses tag
3423 if (parsed_innerclasses_attribute) {
3424 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3425 } else {
3426 parsed_innerclasses_attribute = true;
3427 }
3428 inner_classes_attribute_start = cfs->current();
3429 inner_classes_attribute_length = attribute_length;
3430 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3431 } else if (tag == vmSymbols::tag_synthetic()) {
3432 // Check for Synthetic tag
3433 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3434 if (attribute_length != 0) {
3435 classfile_parse_error(
3436 "Invalid Synthetic classfile attribute length %u in class file %s",
3437 attribute_length, CHECK);
3438 }
3439 parse_classfile_synthetic_attribute(CHECK);
3440 } else if (tag == vmSymbols::tag_deprecated()) {
3441 // Check for Deprecatd tag - 4276120
3442 if (attribute_length != 0) {
3443 classfile_parse_error(
3444 "Invalid Deprecated classfile attribute length %u in class file %s",
3445 attribute_length, CHECK);
3446 }
3447 } else if (_major_version >= JAVA_1_5_VERSION) {
3448 if (tag == vmSymbols::tag_signature()) {
3449 if (_generic_signature_index != 0) {
3450 classfile_parse_error(
3451 "Multiple Signature attributes in class file %s", CHECK);
3452 }
3453 if (attribute_length != 2) {
3454 classfile_parse_error(
3455 "Wrong Signature attribute length %u in class file %s",
3456 attribute_length, CHECK);
3457 }
3458 parse_classfile_signature_attribute(cfs, CHECK);
3459 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3460 if (runtime_visible_annotations != NULL) {
3461 classfile_parse_error(
3462 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3463 }
3464 runtime_visible_annotations_length = attribute_length;
3465 runtime_visible_annotations = cfs->current();
3466 assert(runtime_visible_annotations != NULL, "null visible annotations");
3467 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3468 parse_annotations(cp,
3469 runtime_visible_annotations,
3470 runtime_visible_annotations_length,
3471 parsed_annotations,
3472 _loader_data,
3473 CHECK);
3474 cfs->skip_u1_fast(runtime_visible_annotations_length);
3475 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3476 if (runtime_invisible_annotations_exists) {
3477 classfile_parse_error(
3478 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3479 }
3480 runtime_invisible_annotations_exists = true;
3481 if (PreserveAllAnnotations) {
3482 runtime_invisible_annotations_length = attribute_length;
3483 runtime_invisible_annotations = cfs->current();
3484 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3485 }
3486 cfs->skip_u1(attribute_length, CHECK);
3487 } else if (tag == vmSymbols::tag_enclosing_method()) {
3488 if (parsed_enclosingmethod_attribute) {
3489 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3490 } else {
3491 parsed_enclosingmethod_attribute = true;
3492 }
3493 guarantee_property(attribute_length == 4,
3494 "Wrong EnclosingMethod attribute length %u in class file %s",
3495 attribute_length, CHECK);
3496 cfs->guarantee_more(4, CHECK); // class_index, method_index
3497 enclosing_method_class_index = cfs->get_u2_fast();
3498 enclosing_method_method_index = cfs->get_u2_fast();
3499 if (enclosing_method_class_index == 0) {
3500 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3501 }
3502 // Validate the constant pool indices and types
3503 check_property(valid_klass_reference_at(enclosing_method_class_index),
3504 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3505 if (enclosing_method_method_index != 0 &&
3506 (!cp->is_within_bounds(enclosing_method_method_index) ||
3507 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3508 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3509 }
3510 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3511 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3512 if (parsed_bootstrap_methods_attribute) {
3513 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3514 }
3515 parsed_bootstrap_methods_attribute = true;
3516 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3517 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3518 if (runtime_visible_type_annotations != NULL) {
3519 classfile_parse_error(
3520 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3521 }
3522 runtime_visible_type_annotations_length = attribute_length;
3523 runtime_visible_type_annotations = cfs->current();
3524 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3525 // No need for the VM to parse Type annotations
3526 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3527 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3528 if (runtime_invisible_type_annotations_exists) {
3529 classfile_parse_error(
3530 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3531 } else {
3532 runtime_invisible_type_annotations_exists = true;
3533 }
3534 if (PreserveAllAnnotations) {
3535 runtime_invisible_type_annotations_length = attribute_length;
3536 runtime_invisible_type_annotations = cfs->current();
3537 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3538 }
3539 cfs->skip_u1(attribute_length, CHECK);
3540 } else {
3541 // Unknown attribute
3542 cfs->skip_u1(attribute_length, CHECK);
3543 }
3544 } else {
3545 // Unknown attribute
3546 cfs->skip_u1(attribute_length, CHECK);
3547 }
3548 }
3549 _annotations = assemble_annotations(runtime_visible_annotations,
3550 runtime_visible_annotations_length,
3551 runtime_invisible_annotations,
3552 runtime_invisible_annotations_length,
3553 CHECK);
3554 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3555 runtime_visible_type_annotations_length,
3556 runtime_invisible_type_annotations,
3557 runtime_invisible_type_annotations_length,
3558 CHECK);
3559
3560 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3561 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3562 cfs,
3563 inner_classes_attribute_start,
3564 parsed_innerclasses_attribute,
3565 enclosing_method_class_index,
3566 enclosing_method_method_index,
3567 CHECK);
3568 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3569 guarantee_property(
3570 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3571 "Wrong InnerClasses attribute length in class file %s", CHECK);
3572 }
3573 }
3574
3575 if (_max_bootstrap_specifier_index >= 0) {
3576 guarantee_property(parsed_bootstrap_methods_attribute,
3577 "Missing BootstrapMethods attribute in class file %s", CHECK);
3578 }
3579 }
3580
3581 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3582 assert(k != NULL, "invariant");
3583
3584 if (_synthetic_flag)
3585 k->set_is_synthetic();
3586 if (_sourcefile_index != 0) {
3587 k->set_source_file_name_index(_sourcefile_index);
3588 }
3589 if (_generic_signature_index != 0) {
3590 k->set_generic_signature_index(_generic_signature_index);
3591 }
3592 if (_sde_buffer != NULL) {
3593 k->set_source_debug_extension(_sde_buffer, _sde_length);
3594 }
3595 }
3596
3597 // Create the Annotations object that will
3598 // hold the annotations array for the Klass.
3599 void ClassFileParser::create_combined_annotations(TRAPS) {
3600 if (_annotations == NULL &&
3601 _type_annotations == NULL &&
3602 _fields_annotations == NULL &&
3603 _fields_type_annotations == NULL) {
3604 // Don't create the Annotations object unnecessarily.
3605 return;
3606 }
3607
3608 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3609 annotations->set_class_annotations(_annotations);
3610 annotations->set_class_type_annotations(_type_annotations);
3611 annotations->set_fields_annotations(_fields_annotations);
3612 annotations->set_fields_type_annotations(_fields_type_annotations);
3613
3614 // This is the Annotations object that will be
3615 // assigned to InstanceKlass being constructed.
3616 _combined_annotations = annotations;
3617
3618 // The annotations arrays below has been transfered the
3619 // _combined_annotations so these fields can now be cleared.
3620 _annotations = NULL;
3621 _type_annotations = NULL;
3622 _fields_annotations = NULL;
3623 _fields_type_annotations = NULL;
3624 }
3625
3626 // Transfer ownership of metadata allocated to the InstanceKlass.
3627 void ClassFileParser::apply_parsed_class_metadata(
3628 InstanceKlass* this_klass,
3629 int java_fields_count, TRAPS) {
3630 assert(this_klass != NULL, "invariant");
3631
3632 _cp->set_pool_holder(this_klass);
3633 this_klass->set_constants(_cp);
3634 this_klass->set_fields(_fields, java_fields_count);
3635 this_klass->set_methods(_methods);
3636 this_klass->set_inner_classes(_inner_classes);
3637 this_klass->set_local_interfaces(_local_interfaces);
3638 this_klass->set_transitive_interfaces(_transitive_interfaces);
3639 this_klass->set_annotations(_combined_annotations);
3640
3641 // Clear out these fields so they don't get deallocated by the destructor
3642 clear_class_metadata();
3643 }
3644
3645 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3646 int runtime_visible_annotations_length,
3647 const u1* const runtime_invisible_annotations,
3648 int runtime_invisible_annotations_length,
3649 TRAPS) {
3650 AnnotationArray* annotations = NULL;
3651 if (runtime_visible_annotations != NULL ||
3652 runtime_invisible_annotations != NULL) {
3653 annotations = MetadataFactory::new_array<u1>(_loader_data,
3654 runtime_visible_annotations_length +
3655 runtime_invisible_annotations_length,
3656 CHECK_(annotations));
3657 if (runtime_visible_annotations != NULL) {
3658 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3659 annotations->at_put(i, runtime_visible_annotations[i]);
3660 }
3661 }
3662 if (runtime_invisible_annotations != NULL) {
3663 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3664 int append = runtime_visible_annotations_length+i;
3665 annotations->at_put(append, runtime_invisible_annotations[i]);
3666 }
3667 }
3668 }
3669 return annotations;
3670 }
3671
3672 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3673 const int super_class_index,
3674 const bool need_verify,
3675 TRAPS) {
3676 assert(cp != NULL, "invariant");
3677 const InstanceKlass* super_klass = NULL;
3678
3679 if (super_class_index == 0) {
3680 check_property(_class_name == vmSymbols::java_lang_Object()
3681 || (_access_flags.get_flags() & JVM_ACC_VALUE),
3682 "Invalid superclass index %u in class file %s",
3683 super_class_index,
3684 CHECK_NULL);
3685 } else {
3686 check_property((valid_klass_reference_at(super_class_index) ||
3687 ((EnableValhalla || EnableMVT) && valid_value_type_reference_at(super_class_index))),
3688 "Invalid superclass index %u in class file %s",
3689 super_class_index,
3690 CHECK_NULL);
3691 // The class name should be legal because it is checked when parsing constant pool.
3692 // However, make sure it is not an array type.
3693 bool is_array = false;
3694 if (cp->tag_at(super_class_index).is_klass() || cp->tag_at(super_class_index).is_value_type()) {
3695 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3696 if (need_verify)
3697 is_array = super_klass->is_array_klass();
3698 } else if (need_verify) {
3699 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3700 }
3701 if (need_verify) {
3702 guarantee_property(!is_array,
3703 "Bad superclass name in class file %s", CHECK_NULL);
3704 }
3705 }
3706 return super_klass;
3707 }
3708
3709 #ifndef PRODUCT
3710 static void print_field_layout(const Symbol* name,
3711 Array<u2>* fields,
3712 const constantPoolHandle& cp,
3713 int instance_size,
3714 int instance_fields_start,
3715 int instance_fields_end,
3716 int static_fields_end) {
3717
3718 assert(name != NULL, "invariant");
3719
3720 tty->print("%s: field layout\n", name->as_klass_external_name());
3721 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3722 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3723 if (!fs.access_flags().is_static()) {
3724 tty->print(" @%3d \"%s\" %s\n",
3725 fs.offset(),
3726 fs.name()->as_klass_external_name(),
3727 fs.signature()->as_klass_external_name());
3728 }
3729 }
3730 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3731 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3732 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3733 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3734 if (fs.access_flags().is_static()) {
3735 tty->print(" @%3d \"%s\" %s\n",
3736 fs.offset(),
3737 fs.name()->as_klass_external_name(),
3738 fs.signature()->as_klass_external_name());
3739 }
3740 }
3741 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3742 tty->print("\n");
3743 }
3744 #endif
3745
3746 // Values needed for oopmap and InstanceKlass creation
3747 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3748 public:
3749 OopMapBlocksBuilder* oop_map_blocks;
3750 int instance_size;
3751 int nonstatic_field_size;
3752 int static_field_size;
3753 bool has_nonstatic_fields;
3754 };
3755
3756 // Utility to collect and compact oop maps during layout
3757 class ClassFileParser::OopMapBlocksBuilder : public ResourceObj {
3758 public:
3759 OopMapBlock* nonstatic_oop_maps;
3760 unsigned int nonstatic_oop_map_count;
3761 unsigned int max_nonstatic_oop_maps;
3762
3763 public:
3764 OopMapBlocksBuilder(unsigned int max_blocks, TRAPS) {
3765 max_nonstatic_oop_maps = max_blocks;
3766 nonstatic_oop_map_count = 0;
3767 if (max_blocks == 0) {
3768 nonstatic_oop_maps = NULL;
3769 } else {
3770 nonstatic_oop_maps = NEW_RESOURCE_ARRAY_IN_THREAD(
3771 THREAD, OopMapBlock, max_nonstatic_oop_maps);
3772 memset(nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
3773 }
3774 }
3775
3776 OopMapBlock* last_oop_map() const {
3777 assert(nonstatic_oop_map_count > 0, "Has no oop maps");
3778 return nonstatic_oop_maps + (nonstatic_oop_map_count - 1);
3779 }
3780
3781 // addition of super oop maps
3782 void initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
3783 assert(nof_blocks && nonstatic_oop_map_count == 0 &&
3784 nof_blocks <= max_nonstatic_oop_maps, "invariant");
3785
3786 memcpy(nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
3787 nonstatic_oop_map_count += nof_blocks;
3788 }
3789
3790 // collection of oops
3791 void add(int offset, int count) {
3792 if (nonstatic_oop_map_count == 0) {
3793 nonstatic_oop_map_count++;
3794 }
3795 OopMapBlock* nonstatic_oop_map = last_oop_map();
3796 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
3797 nonstatic_oop_map->set_offset(offset);
3798 nonstatic_oop_map->set_count(count);
3799 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
3800 nonstatic_oop_map->increment_count(count);
3801 } else { // Need a new one...
3802 nonstatic_oop_map_count++;
3803 assert(nonstatic_oop_map_count <= max_nonstatic_oop_maps, "range check");
3804 nonstatic_oop_map = last_oop_map();
3805 nonstatic_oop_map->set_offset(offset);
3806 nonstatic_oop_map->set_count(count);
3807 }
3808 }
3809
3810 // general purpose copy, e.g. into allocated instanceKlass
3811 void copy(OopMapBlock* dst) {
3812 if (nonstatic_oop_map_count != 0) {
3813 memcpy(dst, nonstatic_oop_maps, sizeof(OopMapBlock) * nonstatic_oop_map_count);
3814 }
3815 }
3816
3817 // Sort and compact adjacent blocks
3818 void compact(TRAPS) {
3819 if (nonstatic_oop_map_count <= 1) {
3820 return;
3821 }
3822 /*
3823 * Since field layout sneeks in oops before values, we will be able to condense
3824 * blocks. There is potential to compact between super, own refs and values
3825 * containing refs.
3826 *
3827 * Currently compaction is slightly limited due to values being 8 byte aligned.
3828 * This may well change: FixMe if doesn't, the code below is fairly general purpose
3829 * and maybe it doesn't need to be.
3830 */
3831 qsort(nonstatic_oop_maps, nonstatic_oop_map_count, sizeof(OopMapBlock),
3832 (_sort_Fn)OopMapBlock::compare_offset);
3833 if (nonstatic_oop_map_count < 2) {
3834 return;
3835 }
3836
3837 //Make a temp copy, and iterate through and copy back into the orig
3838 ResourceMark rm(THREAD);
3839 OopMapBlock* oop_maps_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, OopMapBlock,
3840 nonstatic_oop_map_count);
3841 OopMapBlock* oop_maps_copy_end = oop_maps_copy + nonstatic_oop_map_count;
3842 copy(oop_maps_copy);
3843 OopMapBlock* nonstatic_oop_map = nonstatic_oop_maps;
3844 unsigned int new_count = 1;
3845 oop_maps_copy++;
3846 while(oop_maps_copy < oop_maps_copy_end) {
3847 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
3848 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
3849 nonstatic_oop_map->increment_count(oop_maps_copy->count());
3850 } else {
3851 nonstatic_oop_map++;
3852 new_count++;
3853 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
3854 nonstatic_oop_map->set_count(oop_maps_copy->count());
3855 }
3856 oop_maps_copy++;
3857 }
3858 assert(new_count <= nonstatic_oop_map_count, "end up with more maps after compact() ?");
3859 nonstatic_oop_map_count = new_count;
3860 }
3861
3862 void print_on(outputStream* st) const {
3863 st->print_cr(" OopMapBlocks: %3d /%3d", nonstatic_oop_map_count, max_nonstatic_oop_maps);
3864 if (nonstatic_oop_map_count > 0) {
3865 OopMapBlock* map = nonstatic_oop_maps;
3866 OopMapBlock* last_map = last_oop_map();
3867 assert(map <= last_map, "Last less than first");
3868 while (map <= last_map) {
3869 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
3870 map->offset() + map->offset_span() - heapOopSize, map->count());
3871 map++;
3872 }
3873 }
3874 }
3875
3876 void print_value_on(outputStream* st) const {
3877 print_on(st);
3878 }
3879
3880 };
3881
3882 void ClassFileParser::throwValueTypeLimitation(THREAD_AND_LOCATION_DECL,
3883 const char* msg,
3884 const Symbol* name,
3885 const Symbol* sig) const {
3886
3887 ResourceMark rm(THREAD);
3888 if (name == NULL || sig == NULL) {
3889 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
3890 vmSymbols::java_lang_ClassFormatError(),
3891 "class: %s - %s", _class_name->as_C_string(), msg);
3892 }
3893 else {
3894 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
3895 vmSymbols::java_lang_ClassFormatError(),
3896 "\"%s\" sig: \"%s\" class: %s - %s", name->as_C_string(), sig->as_C_string(),
3897 _class_name->as_C_string(), msg);
3898 }
3899 }
3900
3901 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3902 void ClassFileParser::layout_fields(ConstantPool* cp,
3903 const FieldAllocationCount* fac,
3904 const ClassAnnotationCollector* parsed_annotations,
3905 FieldLayoutInfo* info,
3906 TRAPS) {
3907
3908 assert(cp != NULL, "invariant");
3909
3910 // Field size and offset computation
3911 int nonstatic_field_size = _super_klass == NULL ? 0 :
3912 _super_klass->nonstatic_field_size();
3913 int next_nonstatic_valuetype_offset = 0;
3914 int first_nonstatic_valuetype_offset = 0;
3915
3916 // Fields that are value types are handled differently depending if they are static or not:
3917 // - static fields are oops
3918 // - non-static fields are embedded
3919
3920 // Count the contended fields by type.
3921 //
3922 // We ignore static fields, because @Contended is not supported for them.
3923 // The layout code below will also ignore the static fields.
3924 int nonstatic_contended_count = 0;
3925 FieldAllocationCount fac_contended;
3926 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3927 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3928 if (fs.is_contended()) {
3929 fac_contended.count[atype]++;
3930 if (!fs.access_flags().is_static()) {
3931 nonstatic_contended_count++;
3932 }
3933 }
3934 }
3935
3936
3937 // Calculate the starting byte offsets
3938 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3939 // Value types in static fields are not embedded, they are handled with oops
3940 int next_static_double_offset = next_static_oop_offset +
3941 ((fac->count[STATIC_OOP] + fac->count[STATIC_FLATTENABLE]) * heapOopSize);
3942 if ( fac->count[STATIC_DOUBLE] &&
3943 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3944 Universe::field_type_should_be_aligned(T_LONG)) ) {
3945 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3946 }
3947
3948 int next_static_word_offset = next_static_double_offset +
3949 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3950 int next_static_short_offset = next_static_word_offset +
3951 ((fac->count[STATIC_WORD]) * BytesPerInt);
3952 int next_static_byte_offset = next_static_short_offset +
3953 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3954
3955 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3956 nonstatic_field_size * heapOopSize;
3957
3958 // First field of value types is aligned on a long boundary in order to ease
3959 // in-lining of value types (with header removal) in packed arrays and
3960 // flatten value types
3961 int initial_value_type_padding = 0;
3962 if (is_value_type()) {
3963 int old = nonstatic_fields_start;
3964 nonstatic_fields_start = align_up(nonstatic_fields_start, BytesPerLong);
3965 initial_value_type_padding = nonstatic_fields_start - old;
3966 }
3967
3968 int next_nonstatic_field_offset = nonstatic_fields_start;
3969
3970 const bool is_contended_class = parsed_annotations->is_contended();
3971
3972 // Class is contended, pad before all the fields
3973 if (is_contended_class) {
3974 next_nonstatic_field_offset += ContendedPaddingWidth;
3975 }
3976
3977 // Temporary value types restrictions
3978 if (is_value_type()) {
3979 if (is_contended_class) {
3980 throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support @Contended annotation yet");
3981 return;
3982 }
3983 }
3984
3985 // Compute the non-contended fields count.
3986 // The packing code below relies on these counts to determine if some field
3987 // can be squeezed into the alignment gap. Contended fields are obviously
3988 // exempt from that.
3989 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3990 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3991 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3992 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3993 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3994
3995 int static_value_type_count = 0;
3996 int nonstatic_value_type_count = 0;
3997 int* nonstatic_value_type_indexes = NULL;
3998 Klass** nonstatic_value_type_klasses = NULL;
3999 unsigned int value_type_oop_map_count = 0;
4000 int not_flattened_value_types = 0;
4001
4002 int max_nonstatic_value_type = fac->count[NONSTATIC_FLATTENABLE] + 1;
4003
4004 nonstatic_value_type_indexes = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, int,
4005 max_nonstatic_value_type);
4006 for (int i = 0; i < max_nonstatic_value_type; i++) {
4007 nonstatic_value_type_indexes[i] = -1;
4008 }
4009 nonstatic_value_type_klasses = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, Klass*,
4010 max_nonstatic_value_type);
4011
4012 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
4013 if (fs.allocation_type() == STATIC_FLATTENABLE) {
4014 static_value_type_count++;
4015 } else if (fs.allocation_type() == NONSTATIC_FLATTENABLE) {
4016 Symbol* signature = fs.signature();
4017 Klass* klass = SystemDictionary::resolve_or_fail(signature,
4018 Handle(THREAD, _loader_data->class_loader()),
4019 _protection_domain, true, CHECK);
4020 assert(klass != NULL, "Sanity check");
4021 assert(klass->access_flags().is_value_type(), "Value type expected");
4022 ValueKlass* vk = ValueKlass::cast(klass);
4023 // Conditions to apply flattening or not should be defined in a single place
4024 if ( false && // Currently disabling flattening
4025 ((ValueFieldMaxFlatSize < 0) || vk->size_helper() <= ValueFieldMaxFlatSize)) {
4026 nonstatic_value_type_indexes[nonstatic_value_type_count] = fs.index();
4027 nonstatic_value_type_klasses[nonstatic_value_type_count] = klass;
4028 nonstatic_value_type_count++;
4029
4030 ValueKlass* vklass = ValueKlass::cast(klass);
4031 if (vklass->contains_oops()) {
4032 value_type_oop_map_count += vklass->nonstatic_oop_map_count();
4033 }
4034 fs.set_flattening(true);
4035 } else {
4036 not_flattened_value_types++;
4037 fs.set_flattening(false);
4038 }
4039 }
4040 }
4041
4042 // Adjusting non_static_oop_count to take into account not flattened value types;
4043 nonstatic_oop_count += not_flattened_value_types;
4044
4045 // Total non-static fields count, including every contended field
4046 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
4047 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
4048 fac->count[NONSTATIC_OOP] + fac->count[NONSTATIC_FLATTENABLE];
4049
4050 const bool super_has_nonstatic_fields =
4051 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
4052 const bool has_nonstatic_fields =
4053 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
4054 const bool has_nonstatic_value_fields = nonstatic_value_type_count > 0;
4055
4056 if (is_value_type() && (!has_nonstatic_fields)) {
4057 // There are a number of fixes required throughout the type system and JIT
4058 throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support zero instance size yet");
4059 }
4060
4061 // Prepare list of oops for oop map generation.
4062 //
4063 // "offset" and "count" lists are describing the set of contiguous oop
4064 // regions. offset[i] is the start of the i-th region, which then has
4065 // count[i] oops following. Before we know how many regions are required,
4066 // we pessimistically allocate the maps to fit all the oops into the
4067 // distinct regions.
4068 //
4069 int super_oop_map_count = (_super_klass == NULL) ? 0 :_super_klass->nonstatic_oop_map_count();
4070 int max_oop_map_count =
4071 super_oop_map_count +
4072 fac->count[NONSTATIC_OOP] +
4073 value_type_oop_map_count +
4074 not_flattened_value_types;
4075
4076 OopMapBlocksBuilder* nonstatic_oop_maps = new OopMapBlocksBuilder(max_oop_map_count, THREAD);
4077 if (super_oop_map_count > 0) {
4078 nonstatic_oop_maps->initialize_inherited_blocks(_super_klass->start_of_nonstatic_oop_maps(),
4079 _super_klass->nonstatic_oop_map_count());
4080 }
4081
4082 int first_nonstatic_oop_offset = 0; // will be set for first oop field
4083
4084 bool compact_fields = CompactFields;
4085 int allocation_style = FieldsAllocationStyle;
4086 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
4087 assert(false, "0 <= FieldsAllocationStyle <= 2");
4088 allocation_style = 1; // Optimistic
4089 }
4090
4091 // The next classes have predefined hard-coded fields offsets
4092 // (see in JavaClasses::compute_hard_coded_offsets()).
4093 // Use default fields allocation order for them.
4094 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
4095 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
4096 _class_name == vmSymbols::java_lang_Class() ||
4097 _class_name == vmSymbols::java_lang_ClassLoader() ||
4098 _class_name == vmSymbols::java_lang_ref_Reference() ||
4099 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
4100 _class_name == vmSymbols::java_lang_StackTraceElement() ||
4101 _class_name == vmSymbols::java_lang_String() ||
4102 _class_name == vmSymbols::java_lang_Throwable() ||
4103 _class_name == vmSymbols::java_lang_Boolean() ||
4104 _class_name == vmSymbols::java_lang_Character() ||
4105 _class_name == vmSymbols::java_lang_Float() ||
4106 _class_name == vmSymbols::java_lang_Double() ||
4107 _class_name == vmSymbols::java_lang_Byte() ||
4108 _class_name == vmSymbols::java_lang_Short() ||
4109 _class_name == vmSymbols::java_lang_Integer() ||
4110 _class_name == vmSymbols::java_lang_Long())) {
4111 allocation_style = 0; // Allocate oops first
4112 compact_fields = false; // Don't compact fields
4113 }
4114
4115 int next_nonstatic_oop_offset = 0;
4116 int next_nonstatic_double_offset = 0;
4117
4118 // Rearrange fields for a given allocation style
4119 if( allocation_style == 0 ) {
4120 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
4121 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4122 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4123 (nonstatic_oop_count * heapOopSize);
4124 } else if( allocation_style == 1 ) {
4125 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
4126 next_nonstatic_double_offset = next_nonstatic_field_offset;
4127 } else if( allocation_style == 2 ) {
4128 // Fields allocation: oops fields in super and sub classes are together.
4129 if( nonstatic_field_size > 0 && super_oop_map_count > 0 ) {
4130 if (next_nonstatic_field_offset == nonstatic_oop_maps->last_oop_map()->end_offset()) {
4131 allocation_style = 0; // allocate oops first
4132 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4133 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4134 (nonstatic_oop_count * heapOopSize);
4135 }
4136 }
4137 if( allocation_style == 2 ) {
4138 allocation_style = 1; // allocate oops last
4139 next_nonstatic_double_offset = next_nonstatic_field_offset;
4140 }
4141 } else {
4142 ShouldNotReachHere();
4143 }
4144
4145 int nonstatic_oop_space_count = 0;
4146 int nonstatic_word_space_count = 0;
4147 int nonstatic_short_space_count = 0;
4148 int nonstatic_byte_space_count = 0;
4149 int nonstatic_oop_space_offset = 0;
4150 int nonstatic_word_space_offset = 0;
4151 int nonstatic_short_space_offset = 0;
4152 int nonstatic_byte_space_offset = 0;
4153
4154 // Try to squeeze some of the fields into the gaps due to
4155 // long/double alignment.
4156 if (nonstatic_double_count > 0) {
4157 int offset = next_nonstatic_double_offset;
4158 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
4159 if (compact_fields && offset != next_nonstatic_double_offset) {
4160 // Allocate available fields into the gap before double field.
4161 int length = next_nonstatic_double_offset - offset;
4162 assert(length == BytesPerInt, "");
4163 nonstatic_word_space_offset = offset;
4164 if (nonstatic_word_count > 0) {
4165 nonstatic_word_count -= 1;
4166 nonstatic_word_space_count = 1; // Only one will fit
4167 length -= BytesPerInt;
4168 offset += BytesPerInt;
4169 }
4170 nonstatic_short_space_offset = offset;
4171 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4172 nonstatic_short_count -= 1;
4173 nonstatic_short_space_count += 1;
4174 length -= BytesPerShort;
4175 offset += BytesPerShort;
4176 }
4177 nonstatic_byte_space_offset = offset;
4178 while (length > 0 && nonstatic_byte_count > 0) {
4179 nonstatic_byte_count -= 1;
4180 nonstatic_byte_space_count += 1;
4181 length -= 1;
4182 }
4183 // Allocate oop field in the gap if there are no other fields for that.
4184 nonstatic_oop_space_offset = offset;
4185 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4186 allocation_style != 0) { // when oop fields not first
4187 nonstatic_oop_count -= 1;
4188 nonstatic_oop_space_count = 1; // Only one will fit
4189 length -= heapOopSize;
4190 offset += heapOopSize;
4191 }
4192 }
4193 }
4194
4195 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4196 (nonstatic_double_count * BytesPerLong);
4197 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4198 (nonstatic_word_count * BytesPerInt);
4199 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4200 (nonstatic_short_count * BytesPerShort);
4201 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4202 nonstatic_byte_count;
4203
4204 // let oops jump before padding with this allocation style
4205 if( allocation_style == 1 ) {
4206 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4207 if( nonstatic_oop_count > 0 ) {
4208 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4209 }
4210 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4211 }
4212
4213 // Aligning embedded value types
4214 // bug below, the current algorithm to layout embedded value types always put them at the
4215 // end of the layout, which doesn't match the different allocation policies the VM is
4216 // supposed to provide => FixMe
4217 // Note also that the current alignment policy is to make each value type starting on a
4218 // 64 bits boundary. This could be optimized later. For instance, it could be nice to
4219 // align value types according to their most constrained internal type.
4220 next_nonstatic_valuetype_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4221 int next_value_type_index = 0;
4222
4223 // Iterate over fields again and compute correct offsets.
4224 // The field allocation type was temporarily stored in the offset slot.
4225 // oop fields are located before non-oop fields (static and non-static).
4226 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4227
4228 // skip already laid out fields
4229 if (fs.is_offset_set()) continue;
4230
4231 // contended instance fields are handled below
4232 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4233
4234 int real_offset = 0;
4235 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4236
4237 // pack the rest of the fields
4238 switch (atype) {
4239 // Value types in static fields are handled with oops
4240 case STATIC_FLATTENABLE: // Fallthrough
4241 case STATIC_OOP:
4242 real_offset = next_static_oop_offset;
4243 next_static_oop_offset += heapOopSize;
4244 break;
4245 case STATIC_BYTE:
4246 real_offset = next_static_byte_offset;
4247 next_static_byte_offset += 1;
4248 break;
4249 case STATIC_SHORT:
4250 real_offset = next_static_short_offset;
4251 next_static_short_offset += BytesPerShort;
4252 break;
4253 case STATIC_WORD:
4254 real_offset = next_static_word_offset;
4255 next_static_word_offset += BytesPerInt;
4256 break;
4257 case STATIC_DOUBLE:
4258 real_offset = next_static_double_offset;
4259 next_static_double_offset += BytesPerLong;
4260 break;
4261 case NONSTATIC_FLATTENABLE:
4262 if (fs.is_flatten()) {
4263 Klass* klass = nonstatic_value_type_klasses[next_value_type_index];
4264 assert(klass != NULL, "Klass should have been loaded and resolved earlier");
4265 assert(klass->access_flags().is_value_type(),"Must be a value type");
4266 ValueKlass* vklass = ValueKlass::cast(klass);
4267 real_offset = next_nonstatic_valuetype_offset;
4268 next_nonstatic_valuetype_offset += (vklass->size_helper()) * wordSize - vklass->first_field_offset();
4269 // aligning next value type on a 64 bits boundary
4270 next_nonstatic_valuetype_offset = align_up(next_nonstatic_valuetype_offset, BytesPerLong);
4271 next_value_type_index += 1;
4272
4273 if (vklass->contains_oops()) { // add flatten oop maps
4274 int diff = real_offset - vklass->first_field_offset();
4275 const OopMapBlock* map = vklass->start_of_nonstatic_oop_maps();
4276 const OopMapBlock* const last_map = map + vklass->nonstatic_oop_map_count();
4277 while (map < last_map) {
4278 nonstatic_oop_maps->add(map->offset() + diff, map->count());
4279 map++;
4280 }
4281 }
4282 break;
4283 } else {
4284 // Fall through
4285 }
4286 case NONSTATIC_OOP:
4287 if( nonstatic_oop_space_count > 0 ) {
4288 real_offset = nonstatic_oop_space_offset;
4289 nonstatic_oop_space_offset += heapOopSize;
4290 nonstatic_oop_space_count -= 1;
4291 } else {
4292 real_offset = next_nonstatic_oop_offset;
4293 next_nonstatic_oop_offset += heapOopSize;
4294 }
4295 nonstatic_oop_maps->add(real_offset, 1);
4296 break;
4297 case NONSTATIC_BYTE:
4298 if( nonstatic_byte_space_count > 0 ) {
4299 real_offset = nonstatic_byte_space_offset;
4300 nonstatic_byte_space_offset += 1;
4301 nonstatic_byte_space_count -= 1;
4302 } else {
4303 real_offset = next_nonstatic_byte_offset;
4304 next_nonstatic_byte_offset += 1;
4305 }
4306 break;
4307 case NONSTATIC_SHORT:
4308 if( nonstatic_short_space_count > 0 ) {
4309 real_offset = nonstatic_short_space_offset;
4310 nonstatic_short_space_offset += BytesPerShort;
4311 nonstatic_short_space_count -= 1;
4312 } else {
4313 real_offset = next_nonstatic_short_offset;
4314 next_nonstatic_short_offset += BytesPerShort;
4315 }
4316 break;
4317 case NONSTATIC_WORD:
4318 if( nonstatic_word_space_count > 0 ) {
4319 real_offset = nonstatic_word_space_offset;
4320 nonstatic_word_space_offset += BytesPerInt;
4321 nonstatic_word_space_count -= 1;
4322 } else {
4323 real_offset = next_nonstatic_word_offset;
4324 next_nonstatic_word_offset += BytesPerInt;
4325 }
4326 break;
4327 case NONSTATIC_DOUBLE:
4328 real_offset = next_nonstatic_double_offset;
4329 next_nonstatic_double_offset += BytesPerLong;
4330 break;
4331 default:
4332 ShouldNotReachHere();
4333 }
4334 fs.set_offset(real_offset);
4335 }
4336
4337
4338 // Handle the contended cases.
4339 //
4340 // Each contended field should not intersect the cache line with another contended field.
4341 // In the absence of alignment information, we end up with pessimistically separating
4342 // the fields with full-width padding.
4343 //
4344 // Additionally, this should not break alignment for the fields, so we round the alignment up
4345 // for each field.
4346 if (nonstatic_contended_count > 0) {
4347
4348 // if there is at least one contended field, we need to have pre-padding for them
4349 next_nonstatic_padded_offset += ContendedPaddingWidth;
4350
4351 // collect all contended groups
4352 ResourceBitMap bm(cp->size());
4353 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4354 // skip already laid out fields
4355 if (fs.is_offset_set()) continue;
4356
4357 if (fs.is_contended()) {
4358 bm.set_bit(fs.contended_group());
4359 }
4360 }
4361
4362 int current_group = -1;
4363 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4364
4365 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4366
4367 // skip already laid out fields
4368 if (fs.is_offset_set()) continue;
4369
4370 // skip non-contended fields and fields from different group
4371 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4372
4373 // handle statics below
4374 if (fs.access_flags().is_static()) continue;
4375
4376 int real_offset = 0;
4377 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4378
4379 switch (atype) {
4380 case NONSTATIC_BYTE:
4381 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4382 real_offset = next_nonstatic_padded_offset;
4383 next_nonstatic_padded_offset += 1;
4384 break;
4385
4386 case NONSTATIC_SHORT:
4387 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4388 real_offset = next_nonstatic_padded_offset;
4389 next_nonstatic_padded_offset += BytesPerShort;
4390 break;
4391
4392 case NONSTATIC_WORD:
4393 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4394 real_offset = next_nonstatic_padded_offset;
4395 next_nonstatic_padded_offset += BytesPerInt;
4396 break;
4397
4398 case NONSTATIC_DOUBLE:
4399 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4400 real_offset = next_nonstatic_padded_offset;
4401 next_nonstatic_padded_offset += BytesPerLong;
4402 break;
4403
4404 // Value types in static fields are handled with oops
4405 case NONSTATIC_FLATTENABLE:
4406 throwValueTypeLimitation(THREAD_AND_LOCATION,
4407 "@Contended annotation not supported for value types yet", fs.name(), fs.signature());
4408 return;
4409
4410 case NONSTATIC_OOP:
4411 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4412 real_offset = next_nonstatic_padded_offset;
4413 next_nonstatic_padded_offset += heapOopSize;
4414 nonstatic_oop_maps->add(real_offset, 1);
4415 break;
4416
4417 default:
4418 ShouldNotReachHere();
4419 }
4420
4421 if (fs.contended_group() == 0) {
4422 // Contended group defines the equivalence class over the fields:
4423 // the fields within the same contended group are not inter-padded.
4424 // The only exception is default group, which does not incur the
4425 // equivalence, and so requires intra-padding.
4426 next_nonstatic_padded_offset += ContendedPaddingWidth;
4427 }
4428
4429 fs.set_offset(real_offset);
4430 } // for
4431
4432 // Start laying out the next group.
4433 // Note that this will effectively pad the last group in the back;
4434 // this is expected to alleviate memory contention effects for
4435 // subclass fields and/or adjacent object.
4436 // If this was the default group, the padding is already in place.
4437 if (current_group != 0) {
4438 next_nonstatic_padded_offset += ContendedPaddingWidth;
4439 }
4440 }
4441
4442 // handle static fields
4443 }
4444
4445 // Entire class is contended, pad in the back.
4446 // This helps to alleviate memory contention effects for subclass fields
4447 // and/or adjacent object.
4448 if (is_contended_class) {
4449 assert(!is_value_type(), "@Contended not supported for value types yet");
4450 next_nonstatic_padded_offset += ContendedPaddingWidth;
4451 }
4452
4453 int notaligned_nonstatic_fields_end;
4454 if (nonstatic_value_type_count != 0) {
4455 notaligned_nonstatic_fields_end = next_nonstatic_valuetype_offset;
4456 } else {
4457 notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4458 }
4459
4460 int nonstatic_field_sz_align = heapOopSize;
4461 if (is_value_type()) {
4462 if ((notaligned_nonstatic_fields_end - nonstatic_fields_start) > heapOopSize) {
4463 nonstatic_field_sz_align = BytesPerLong; // value copy of fields only uses jlong copy
4464 }
4465 }
4466 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, nonstatic_field_sz_align);
4467 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4468 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4469
4470 int static_field_size = (static_fields_end -
4471 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4472 nonstatic_field_size = nonstatic_field_size +
4473 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4474
4475 int instance_size = align_object_size(instance_end / wordSize);
4476
4477 assert(instance_size == align_object_size(align_up(
4478 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize)
4479 + initial_value_type_padding, wordSize) / wordSize), "consistent layout helper value");
4480
4481
4482 // Invariant: nonstatic_field end/start should only change if there are
4483 // nonstatic fields in the class, or if the class is contended. We compare
4484 // against the non-aligned value, so that end alignment will not fail the
4485 // assert without actually having the fields.
4486 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4487 is_contended_class ||
4488 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4489
4490 // Number of non-static oop map blocks allocated at end of klass.
4491 nonstatic_oop_maps->compact(THREAD);
4492
4493 #ifndef PRODUCT
4494 if ((PrintFieldLayout && !is_value_type()) ||
4495 (PrintValueLayout && (is_value_type() || has_nonstatic_value_fields))) {
4496 print_field_layout(_class_name,
4497 _fields,
4498 cp,
4499 instance_size,
4500 nonstatic_fields_start,
4501 nonstatic_fields_end,
4502 static_fields_end);
4503 nonstatic_oop_maps->print_on(tty);
4504 tty->print("\n");
4505 }
4506
4507 #endif
4508 // Pass back information needed for InstanceKlass creation
4509 info->oop_map_blocks = nonstatic_oop_maps;
4510 info->instance_size = instance_size;
4511 info->static_field_size = static_field_size;
4512 info->nonstatic_field_size = nonstatic_field_size;
4513 info->has_nonstatic_fields = has_nonstatic_fields;
4514 }
4515
4516 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4517 assert(ik != NULL, "invariant");
4518
4519 const Klass* const super = ik->super();
4520
4521 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4522 // in which case we don't have to register objects as finalizable
4523 if (!_has_empty_finalizer) {
4524 if (_has_finalizer ||
4525 (super != NULL && super->has_finalizer())) {
4526 ik->set_has_finalizer();
4527 }
4528 }
4529
4530 #ifdef ASSERT
4531 bool f = false;
4532 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4533 vmSymbols::void_method_signature());
4534 if (m != NULL && !m->is_empty_method()) {
4535 f = true;
4536 }
4537
4538 // Spec doesn't prevent agent from redefinition of empty finalizer.
4539 // Despite the fact that it's generally bad idea and redefined finalizer
4540 // will not work as expected we shouldn't abort vm in this case
4541 if (!ik->has_redefined_this_or_super()) {
4542 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4543 }
4544 #endif
4545
4546 // Check if this klass supports the java.lang.Cloneable interface
4547 if (SystemDictionary::Cloneable_klass_loaded()) {
4548 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4549 ik->set_is_cloneable();
4550 }
4551 }
4552
4553 // Check if this klass has a vanilla default constructor
4554 if (super == NULL) {
4555 // java.lang.Object has empty default constructor
4556 ik->set_has_vanilla_constructor();
4557 } else {
4558 if (super->has_vanilla_constructor() &&
4559 _has_vanilla_constructor) {
4560 ik->set_has_vanilla_constructor();
4561 }
4562 #ifdef ASSERT
4563 bool v = false;
4564 if (super->has_vanilla_constructor()) {
4565 const Method* const constructor =
4566 ik->find_method(vmSymbols::object_initializer_name(),
4567 vmSymbols::void_method_signature());
4568 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4569 v = true;
4570 }
4571 }
4572 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4573 #endif
4574 }
4575
4576 // If it cannot be fast-path allocated, set a bit in the layout helper.
4577 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4578 assert(ik->size_helper() > 0, "layout_helper is initialized");
4579 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4580 || ik->is_abstract() || ik->is_interface()
4581 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4582 || ik->size_helper() >= FastAllocateSizeLimit) {
4583 // Forbid fast-path allocation.
4584 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4585 ik->set_layout_helper(lh);
4586 }
4587 }
4588
4589 bool ClassFileParser::supports_value_types() const {
4590 // Value types are only supported by class file version 53.1 and later
4591 return _major_version > JAVA_9_VERSION || (_major_version == JAVA_9_VERSION && _minor_version >= 1);
4592 }
4593
4594 // Attach super classes and interface classes to class loader data
4595 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4596 TRAPS) {
4597 assert(defined_klass != NULL, "invariant");
4598
4599 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4600 if (defining_loader_data->is_the_null_class_loader_data()) {
4601 // Dependencies to null class loader data are implicit.
4602 return;
4603 } else {
4604 // add super class dependency
4605 Klass* const super = defined_klass->super();
4606 if (super != NULL) {
4607 defining_loader_data->record_dependency(super, CHECK);
4608 }
4609
4610 // add super interface dependencies
4611 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4612 if (local_interfaces != NULL) {
4613 const int length = local_interfaces->length();
4614 for (int i = 0; i < length; i++) {
4615 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4616 }
4617 }
4618
4619 for(int i = 0; i < defined_klass->java_fields_count(); i++) {
4620 if ((defined_klass->field_access_flags(i) & JVM_ACC_FLATTENABLE) != 0) {
4621 const Klass* klass = defined_klass->get_value_field_klass(i);
4622 defining_loader_data->record_dependency(klass, CHECK);
4623 }
4624 }
4625 }
4626 }
4627
4628 // utility methods for appending an array with check for duplicates
4629
4630 static void append_interfaces(GrowableArray<Klass*>* result,
4631 const Array<Klass*>* const ifs) {
4632 // iterate over new interfaces
4633 for (int i = 0; i < ifs->length(); i++) {
4634 Klass* const e = ifs->at(i);
4635 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4636 // add new interface
4637 result->append_if_missing(e);
4638 }
4639 }
4640
4641 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4642 Array<Klass*>* local_ifs,
4643 ClassLoaderData* loader_data,
4644 TRAPS) {
4645 assert(local_ifs != NULL, "invariant");
4646 assert(loader_data != NULL, "invariant");
4647
4648 // Compute maximum size for transitive interfaces
4649 int max_transitive_size = 0;
4650 int super_size = 0;
4651 // Add superclass transitive interfaces size
4652 if (super != NULL) {
4653 super_size = super->transitive_interfaces()->length();
4654 max_transitive_size += super_size;
4655 }
4656 // Add local interfaces' super interfaces
4657 const int local_size = local_ifs->length();
4658 for (int i = 0; i < local_size; i++) {
4659 Klass* const l = local_ifs->at(i);
4660 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4661 }
4662 // Finally add local interfaces
4663 max_transitive_size += local_size;
4664 // Construct array
4665 if (max_transitive_size == 0) {
4666 // no interfaces, use canonicalized array
4667 return Universe::the_empty_klass_array();
4668 } else if (max_transitive_size == super_size) {
4669 // no new local interfaces added, share superklass' transitive interface array
4670 return super->transitive_interfaces();
4671 } else if (max_transitive_size == local_size) {
4672 // only local interfaces added, share local interface array
4673 return local_ifs;
4674 } else {
4675 ResourceMark rm;
4676 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4677
4678 // Copy down from superclass
4679 if (super != NULL) {
4680 append_interfaces(result, super->transitive_interfaces());
4681 }
4682
4683 // Copy down from local interfaces' superinterfaces
4684 for (int i = 0; i < local_size; i++) {
4685 Klass* const l = local_ifs->at(i);
4686 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4687 }
4688 // Finally add local interfaces
4689 append_interfaces(result, local_ifs);
4690
4691 // length will be less than the max_transitive_size if duplicates were removed
4692 const int length = result->length();
4693 assert(length <= max_transitive_size, "just checking");
4694 Array<Klass*>* const new_result =
4695 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4696 for (int i = 0; i < length; i++) {
4697 Klass* const e = result->at(i);
4698 assert(e != NULL, "just checking");
4699 new_result->at_put(i, e);
4700 }
4701 return new_result;
4702 }
4703 }
4704
4705 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4706 assert(this_klass != NULL, "invariant");
4707 const Klass* const super = this_klass->super();
4708 if (super != NULL) {
4709
4710 // If the loader is not the boot loader then throw an exception if its
4711 // superclass is in package jdk.internal.reflect and its loader is not a
4712 // special reflection class loader
4713 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4714 assert(super->is_instance_klass(), "super is not instance klass");
4715 PackageEntry* super_package = super->package();
4716 if (super_package != NULL &&
4717 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4718 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4719 ResourceMark rm(THREAD);
4720 Exceptions::fthrow(
4721 THREAD_AND_LOCATION,
4722 vmSymbols::java_lang_IllegalAccessError(),
4723 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4724 this_klass->external_name(),
4725 this_klass->class_loader_data()->loader_name(),
4726 super->external_name());
4727 return;
4728 }
4729 }
4730
4731 Reflection::VerifyClassAccessResults vca_result =
4732 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4733 if (vca_result != Reflection::ACCESS_OK) {
4734 ResourceMark rm(THREAD);
4735 char* msg = Reflection::verify_class_access_msg(this_klass,
4736 InstanceKlass::cast(super),
4737 vca_result);
4738 if (msg == NULL) {
4739 Exceptions::fthrow(
4740 THREAD_AND_LOCATION,
4741 vmSymbols::java_lang_IllegalAccessError(),
4742 "class %s cannot access its superclass %s",
4743 this_klass->external_name(),
4744 super->external_name());
4745 } else {
4746 // Add additional message content.
4747 Exceptions::fthrow(
4748 THREAD_AND_LOCATION,
4749 vmSymbols::java_lang_IllegalAccessError(),
4750 "superclass access check failed: %s",
4751 msg);
4752 }
4753 }
4754 }
4755 }
4756
4757
4758 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4759 assert(this_klass != NULL, "invariant");
4760 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4761 const int lng = local_interfaces->length();
4762 for (int i = lng - 1; i >= 0; i--) {
4763 Klass* const k = local_interfaces->at(i);
4764 assert (k != NULL && k->is_interface(), "invalid interface");
4765 Reflection::VerifyClassAccessResults vca_result =
4766 Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false);
4767 if (vca_result != Reflection::ACCESS_OK) {
4768 ResourceMark rm(THREAD);
4769 char* msg = Reflection::verify_class_access_msg(this_klass,
4770 InstanceKlass::cast(k),
4771 vca_result);
4772 if (msg == NULL) {
4773 Exceptions::fthrow(
4774 THREAD_AND_LOCATION,
4775 vmSymbols::java_lang_IllegalAccessError(),
4776 "class %s cannot access its superinterface %s",
4777 this_klass->external_name(),
4778 k->external_name());
4779 } else {
4780 // Add additional message content.
4781 Exceptions::fthrow(
4782 THREAD_AND_LOCATION,
4783 vmSymbols::java_lang_IllegalAccessError(),
4784 "superinterface check failed: %s",
4785 msg);
4786 }
4787 }
4788 }
4789 }
4790
4791
4792 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4793 assert(this_klass != NULL, "invariant");
4794 const Array<Method*>* const methods = this_klass->methods();
4795 const int num_methods = methods->length();
4796
4797 // go thru each method and check if it overrides a final method
4798 for (int index = 0; index < num_methods; index++) {
4799 const Method* const m = methods->at(index);
4800
4801 // skip private, static, and <init> methods
4802 if ((!m->is_private() && !m->is_static()) &&
4803 (m->name() != vmSymbols::object_initializer_name())) {
4804
4805 const Symbol* const name = m->name();
4806 const Symbol* const signature = m->signature();
4807 const Klass* k = this_klass->super();
4808 const Method* super_m = NULL;
4809 while (k != NULL) {
4810 // skip supers that don't have final methods.
4811 if (k->has_final_method()) {
4812 // lookup a matching method in the super class hierarchy
4813 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4814 if (super_m == NULL) {
4815 break; // didn't find any match; get out
4816 }
4817
4818 if (super_m->is_final() && !super_m->is_static() &&
4819 // matching method in super is final, and not static
4820 (Reflection::verify_field_access(this_klass,
4821 super_m->method_holder(),
4822 super_m->method_holder(),
4823 super_m->access_flags(), false))
4824 // this class can access super final method and therefore override
4825 ) {
4826 ResourceMark rm(THREAD);
4827 Exceptions::fthrow(
4828 THREAD_AND_LOCATION,
4829 vmSymbols::java_lang_VerifyError(),
4830 "class %s overrides final method %s.%s%s",
4831 this_klass->external_name(),
4832 super_m->method_holder()->external_name(),
4833 name->as_C_string(),
4834 signature->as_C_string()
4835 );
4836 return;
4837 }
4838
4839 // continue to look from super_m's holder's super.
4840 k = super_m->method_holder()->super();
4841 continue;
4842 }
4843
4844 k = k->super();
4845 }
4846 }
4847 }
4848 }
4849
4850
4851 // assumes that this_klass is an interface
4852 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4853 assert(this_klass != NULL, "invariant");
4854 assert(this_klass->is_interface(), "not an interface");
4855 const Array<Method*>* methods = this_klass->methods();
4856 const int num_methods = methods->length();
4857
4858 for (int index = 0; index < num_methods; index++) {
4859 const Method* const m = methods->at(index);
4860 // if m is static and not the init method, throw a verify error
4861 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4862 ResourceMark rm(THREAD);
4863 Exceptions::fthrow(
4864 THREAD_AND_LOCATION,
4865 vmSymbols::java_lang_VerifyError(),
4866 "Illegal static method %s in interface %s",
4867 m->name()->as_C_string(),
4868 this_klass->external_name()
4869 );
4870 return;
4871 }
4872 }
4873 }
4874
4875 // utility methods for format checking
4876
4877 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4878 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4879 const bool is_value_type = (flags & JVM_ACC_VALUE) != 0;
4880 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4881 assert(supports_value_types() || !is_value_type, "JVM_ACC_VALUE should not be set");
4882 if (is_module) {
4883 ResourceMark rm(THREAD);
4884 Exceptions::fthrow(
4885 THREAD_AND_LOCATION,
4886 vmSymbols::java_lang_NoClassDefFoundError(),
4887 "%s is not a class because access_flag ACC_MODULE is set",
4888 _class_name->as_C_string());
4889 return;
4890 }
4891
4892 if (!_need_verify) { return; }
4893
4894 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4895 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4896 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4897 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4898 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4899 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4900 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4901
4902 if ((is_abstract && is_final) ||
4903 (is_interface && !is_abstract) ||
4904 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4905 (!is_interface && major_gte_15 && is_annotation)) {
4906 ResourceMark rm(THREAD);
4907 Exceptions::fthrow(
4908 THREAD_AND_LOCATION,
4909 vmSymbols::java_lang_ClassFormatError(),
4910 "Illegal class modifiers in class %s: 0x%X",
4911 _class_name->as_C_string(), flags
4912 );
4913 return;
4914 }
4915 }
4916
4917 static bool has_illegal_visibility(jint flags) {
4918 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4919 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4920 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4921
4922 return ((is_public && is_protected) ||
4923 (is_public && is_private) ||
4924 (is_protected && is_private));
4925 }
4926
4927 static bool is_supported_version(u2 major, u2 minor) {
4928 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4929 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4930 (major <= max_version) &&
4931 ((major != max_version) ||
4932 (minor <= JVM_CLASSFILE_MINOR_VERSION));
4933 }
4934
4935 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4936 bool is_interface,
4937 TRAPS) const {
4938 if (!_need_verify) { return; }
4939
4940 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4941 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4942 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4943 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4944 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4945 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4946 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4947 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4948 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4949
4950 bool is_illegal = false;
4951
4952 if (is_interface) {
4953 if (!is_public || !is_static || !is_final || is_private ||
4954 is_protected || is_volatile || is_transient ||
4955 (major_gte_15 && is_enum)) {
4956 is_illegal = true;
4957 }
4958 } else { // not interface
4959 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4960 is_illegal = true;
4961 }
4962 }
4963
4964 if (is_illegal) {
4965 ResourceMark rm(THREAD);
4966 Exceptions::fthrow(
4967 THREAD_AND_LOCATION,
4968 vmSymbols::java_lang_ClassFormatError(),
4969 "Illegal field modifiers in class %s: 0x%X",
4970 _class_name->as_C_string(), flags);
4971 return;
4972 }
4973 }
4974
4975 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4976 bool is_interface,
4977 const Symbol* name,
4978 TRAPS) const {
4979 if (!_need_verify) { return; }
4980
4981 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4982 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4983 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4984 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4985 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4986 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4987 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4988 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4989 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4990 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4991 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4992 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4993 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4994
4995 bool is_illegal = false;
4996
4997 if (is_interface) {
4998 if (major_gte_8) {
4999 // Class file version is JAVA_8_VERSION or later Methods of
5000 // interfaces may set any of the flags except ACC_PROTECTED,
5001 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
5002 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
5003 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
5004 (is_native || is_protected || is_final || is_synchronized) ||
5005 // If a specific method of a class or interface has its
5006 // ACC_ABSTRACT flag set, it must not have any of its
5007 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
5008 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
5009 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
5010 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
5011 (is_abstract && (is_private || is_static || is_strict))) {
5012 is_illegal = true;
5013 }
5014 } else if (major_gte_15) {
5015 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
5016 if (!is_public || is_private || is_protected || is_static || is_final ||
5017 is_synchronized || is_native || !is_abstract || is_strict) {
5018 is_illegal = true;
5019 }
5020 } else {
5021 // Class file version is pre-JAVA_1_5_VERSION
5022 if (!is_public || is_static || is_final || is_native || !is_abstract) {
5023 is_illegal = true;
5024 }
5025 }
5026 } else { // not interface
5027 if (has_illegal_visibility(flags)) {
5028 is_illegal = true;
5029 } else {
5030 if (is_initializer) {
5031 if (is_static || is_final || is_synchronized || is_native ||
5032 is_abstract || (major_gte_15 && is_bridge)) {
5033 is_illegal = true;
5034 }
5035 } else { // not initializer
5036 if (is_abstract) {
5037 if ((is_final || is_native || is_private || is_static ||
5038 (major_gte_15 && (is_synchronized || is_strict)))) {
5039 is_illegal = true;
5040 }
5041 }
5042 }
5043 }
5044 }
5045
5046 if (is_illegal) {
5047 ResourceMark rm(THREAD);
5048 Exceptions::fthrow(
5049 THREAD_AND_LOCATION,
5050 vmSymbols::java_lang_ClassFormatError(),
5051 "Method %s in class %s has illegal modifiers: 0x%X",
5052 name->as_C_string(), _class_name->as_C_string(), flags);
5053 return;
5054 }
5055 }
5056
5057 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
5058 int length,
5059 TRAPS) const {
5060 assert(_need_verify, "only called when _need_verify is true");
5061 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
5062 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5063 }
5064 }
5065
5066 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5067 // In class names, '/' separates unqualified names. This is verified in this function also.
5068 // Method names also may not contain the characters '<' or '>', unless <init>
5069 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5070 // method. Because these names have been checked as special cases before
5071 // calling this method in verify_legal_method_name.
5072 //
5073 // This method is also called from the modular system APIs in modules.cpp
5074 // to verify the validity of module and package names.
5075 bool ClassFileParser::verify_unqualified_name(const char* name,
5076 unsigned int length,
5077 int type) {
5078 for (const char* p = name; p != name + length;) {
5079 jchar ch = *p;
5080 if (ch < 128) {
5081 if (ch == '.' || ch == ';' || ch == '[' ) {
5082 return false; // do not permit '.', ';', or '['
5083 }
5084 if (ch == '/') {
5085 // check for '//' or leading or trailing '/' which are not legal
5086 // unqualified name must not be empty
5087 if (type == ClassFileParser::LegalClass) {
5088 if (p == name || p+1 >= name+length || *(p+1) == '/') {
5089 return false;
5090 }
5091 } else {
5092 return false; // do not permit '/' unless it's class name
5093 }
5094 }
5095 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
5096 return false; // do not permit '<' or '>' in method names
5097 }
5098 p++;
5099 } else {
5100 char* tmp_p = UTF8::next(p, &ch);
5101 p = tmp_p;
5102 }
5103 }
5104 return true;
5105 }
5106
5107 // Take pointer to a string. Skip over the longest part of the string that could
5108 // be taken as a fieldname. Allow '/' if slash_ok is true.
5109 // Return a pointer to just past the fieldname.
5110 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5111 // being true, we saw consecutive slashes (meaning we were looking for a
5112 // qualified path but found something that was badly-formed).
5113 static const char* skip_over_field_name(const char* name,
5114 bool slash_ok,
5115 unsigned int length) {
5116 const char* p;
5117 jboolean last_is_slash = false;
5118 jboolean not_first_ch = false;
5119
5120 for (p = name; p != name + length; not_first_ch = true) {
5121 const char* old_p = p;
5122 jchar ch = *p;
5123 if (ch < 128) {
5124 p++;
5125 // quick check for ascii
5126 if ((ch >= 'a' && ch <= 'z') ||
5127 (ch >= 'A' && ch <= 'Z') ||
5128 (ch == '_' || ch == '$') ||
5129 (not_first_ch && ch >= '0' && ch <= '9')) {
5130 last_is_slash = false;
5131 continue;
5132 }
5133 if (slash_ok && ch == '/') {
5134 if (last_is_slash) {
5135 return NULL; // Don't permit consecutive slashes
5136 }
5137 last_is_slash = true;
5138 continue;
5139 }
5140 }
5141 else {
5142 jint unicode_ch;
5143 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5144 p = tmp_p;
5145 last_is_slash = false;
5146 // Check if ch is Java identifier start or is Java identifier part
5147 // 4672820: call java.lang.Character methods directly without generating separate tables.
5148 EXCEPTION_MARK;
5149
5150 // return value
5151 JavaValue result(T_BOOLEAN);
5152 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
5153 JavaCallArguments args;
5154 args.push_int(unicode_ch);
5155
5156 // public static boolean isJavaIdentifierStart(char ch);
5157 JavaCalls::call_static(&result,
5158 SystemDictionary::Character_klass(),
5159 vmSymbols::isJavaIdentifierStart_name(),
5160 vmSymbols::int_bool_signature(),
5161 &args,
5162 THREAD);
5163
5164 if (HAS_PENDING_EXCEPTION) {
5165 CLEAR_PENDING_EXCEPTION;
5166 return 0;
5167 }
5168 if (result.get_jboolean()) {
5169 continue;
5170 }
5171
5172 if (not_first_ch) {
5173 // public static boolean isJavaIdentifierPart(char ch);
5174 JavaCalls::call_static(&result,
5175 SystemDictionary::Character_klass(),
5176 vmSymbols::isJavaIdentifierPart_name(),
5177 vmSymbols::int_bool_signature(),
5178 &args,
5179 THREAD);
5180
5181 if (HAS_PENDING_EXCEPTION) {
5182 CLEAR_PENDING_EXCEPTION;
5183 return 0;
5184 }
5185
5186 if (result.get_jboolean()) {
5187 continue;
5188 }
5189 }
5190 }
5191 return (not_first_ch) ? old_p : NULL;
5192 }
5193 return (not_first_ch) ? p : NULL;
5194 }
5195
5196 // Take pointer to a string. Skip over the longest part of the string that could
5197 // be taken as a field signature. Allow "void" if void_ok.
5198 // Return a pointer to just past the signature.
5199 // Return NULL if no legal signature is found.
5200 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5201 bool void_ok,
5202 unsigned int length,
5203 TRAPS) const {
5204 unsigned int array_dim = 0;
5205 while (length > 0) {
5206 switch (signature[0]) {
5207 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5208 case JVM_SIGNATURE_BOOLEAN:
5209 case JVM_SIGNATURE_BYTE:
5210 case JVM_SIGNATURE_CHAR:
5211 case JVM_SIGNATURE_SHORT:
5212 case JVM_SIGNATURE_INT:
5213 case JVM_SIGNATURE_FLOAT:
5214 case JVM_SIGNATURE_LONG:
5215 case JVM_SIGNATURE_DOUBLE:
5216 return signature + 1;
5217 case JVM_SIGNATURE_CLASS:
5218 case JVM_SIGNATURE_VALUE_CLASS: {
5219 if (_major_version < JAVA_1_5_VERSION) {
5220 // Skip over the class name if one is there
5221 const char* const p = skip_over_field_name(signature + 1, true, --length);
5222
5223 // The next character better be a semicolon
5224 if (p && (p - signature) > 1 && p[0] == ';') {
5225 return p + 1;
5226 }
5227 }
5228 else {
5229 // Skip leading 'L' and ignore first appearance of ';'
5230 length--;
5231 signature++;
5232 char* c = strchr((char*) signature, ';');
5233 // Format check signature
5234 if (c != NULL) {
5235 ResourceMark rm(THREAD);
5236 int newlen = c - (char*) signature;
5237 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
5238 strncpy(sig, signature, newlen);
5239 sig[newlen] = '\0';
5240
5241 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
5242 if (!legal) {
5243 classfile_parse_error("Class name contains illegal character "
5244 "in descriptor in class file %s",
5245 CHECK_0);
5246 return NULL;
5247 }
5248 return signature + newlen + 1;
5249 }
5250 }
5251 return NULL;
5252 }
5253 case JVM_SIGNATURE_ARRAY:
5254 array_dim++;
5255 if (array_dim > 255) {
5256 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5257 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5258 }
5259 // The rest of what's there better be a legal signature
5260 signature++;
5261 length--;
5262 void_ok = false;
5263 break;
5264 default:
5265 return NULL;
5266 }
5267 }
5268 return NULL;
5269 }
5270
5271 // Checks if name is a legal class name.
5272 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5273 if (!_need_verify || _relax_verify) { return; }
5274
5275 char buf[fixed_buffer_size];
5276 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5277 unsigned int length = name->utf8_length();
5278 bool legal = false;
5279
5280 if (length > 0) {
5281 const char* p;
5282 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5283 p = skip_over_field_signature(bytes, false, length, CHECK);
5284 legal = (p != NULL) && ((p - bytes) == (int)length);
5285 } else if (_major_version < JAVA_1_5_VERSION) {
5286 if (bytes[0] != '<') {
5287 p = skip_over_field_name(bytes, true, length);
5288 legal = (p != NULL) && ((p - bytes) == (int)length);
5289 }
5290 } else {
5291 // 4900761: relax the constraints based on JSR202 spec
5292 // Class names may be drawn from the entire Unicode character set.
5293 // Identifiers between '/' must be unqualified names.
5294 // The utf8 string has been verified when parsing cpool entries.
5295 legal = verify_unqualified_name(bytes, length, LegalClass);
5296 }
5297 }
5298 if (!legal) {
5299 ResourceMark rm(THREAD);
5300 assert(_class_name != NULL, "invariant");
5301 Exceptions::fthrow(
5302 THREAD_AND_LOCATION,
5303 vmSymbols::java_lang_ClassFormatError(),
5304 "Illegal class name \"%s\" in class file %s", bytes,
5305 _class_name->as_C_string()
5306 );
5307 return;
5308 }
5309 }
5310
5311 // Checks if name is a legal field name.
5312 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5313 if (!_need_verify || _relax_verify) { return; }
5314
5315 char buf[fixed_buffer_size];
5316 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5317 unsigned int length = name->utf8_length();
5318 bool legal = false;
5319
5320 if (length > 0) {
5321 if (_major_version < JAVA_1_5_VERSION) {
5322 if (bytes[0] != '<') {
5323 const char* p = skip_over_field_name(bytes, false, length);
5324 legal = (p != NULL) && ((p - bytes) == (int)length);
5325 }
5326 } else {
5327 // 4881221: relax the constraints based on JSR202 spec
5328 legal = verify_unqualified_name(bytes, length, LegalField);
5329 }
5330 }
5331
5332 if (!legal) {
5333 ResourceMark rm(THREAD);
5334 assert(_class_name != NULL, "invariant");
5335 Exceptions::fthrow(
5336 THREAD_AND_LOCATION,
5337 vmSymbols::java_lang_ClassFormatError(),
5338 "Illegal field name \"%s\" in class %s", bytes,
5339 _class_name->as_C_string()
5340 );
5341 return;
5342 }
5343 }
5344
5345 // Checks if name is a legal method name.
5346 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5347 if (!_need_verify || _relax_verify) { return; }
5348
5349 assert(name != NULL, "method name is null");
5350 char buf[fixed_buffer_size];
5351 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5352 unsigned int length = name->utf8_length();
5353 bool legal = false;
5354
5355 if (length > 0) {
5356 if (bytes[0] == '<') {
5357 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5358 legal = true;
5359 }
5360 } else if (_major_version < JAVA_1_5_VERSION) {
5361 const char* p;
5362 p = skip_over_field_name(bytes, false, length);
5363 legal = (p != NULL) && ((p - bytes) == (int)length);
5364 } else {
5365 // 4881221: relax the constraints based on JSR202 spec
5366 legal = verify_unqualified_name(bytes, length, LegalMethod);
5367 }
5368 }
5369
5370 if (!legal) {
5371 ResourceMark rm(THREAD);
5372 assert(_class_name != NULL, "invariant");
5373 Exceptions::fthrow(
5374 THREAD_AND_LOCATION,
5375 vmSymbols::java_lang_ClassFormatError(),
5376 "Illegal method name \"%s\" in class %s", bytes,
5377 _class_name->as_C_string()
5378 );
5379 return;
5380 }
5381 }
5382
5383
5384 // Checks if signature is a legal field signature.
5385 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5386 const Symbol* signature,
5387 TRAPS) const {
5388 if (!_need_verify) { return; }
5389
5390 char buf[fixed_buffer_size];
5391 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5392 const unsigned int length = signature->utf8_length();
5393 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5394
5395 if (p == NULL || (p - bytes) != (int)length) {
5396 throwIllegalSignature("Field", name, signature, CHECK);
5397 }
5398 }
5399
5400 // Checks if signature is a legal method signature.
5401 // Returns number of parameters
5402 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5403 const Symbol* signature,
5404 TRAPS) const {
5405 if (!_need_verify) {
5406 // make sure caller's args_size will be less than 0 even for non-static
5407 // method so it will be recomputed in compute_size_of_parameters().
5408 return -2;
5409 }
5410
5411 // Class initializers cannot have args for class format version >= 51.
5412 if (name == vmSymbols::class_initializer_name() &&
5413 signature != vmSymbols::void_method_signature() &&
5414 _major_version >= JAVA_7_VERSION) {
5415 throwIllegalSignature("Method", name, signature, CHECK_0);
5416 return 0;
5417 }
5418
5419 unsigned int args_size = 0;
5420 char buf[fixed_buffer_size];
5421 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5422 unsigned int length = signature->utf8_length();
5423 const char* nextp;
5424
5425 // The first character must be a '('
5426 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5427 length--;
5428 // Skip over legal field signatures
5429 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5430 while ((length > 0) && (nextp != NULL)) {
5431 args_size++;
5432 if (p[0] == 'J' || p[0] == 'D') {
5433 args_size++;
5434 }
5435 length -= nextp - p;
5436 p = nextp;
5437 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5438 }
5439 // The first non-signature thing better be a ')'
5440 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5441 length--;
5442 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5443 // All internal methods must return void
5444 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5445 return args_size;
5446 }
5447 } else {
5448 // Now we better just have a return value
5449 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5450 if (nextp && ((int)length == (nextp - p))) {
5451 return args_size;
5452 }
5453 }
5454 }
5455 }
5456 // Report error
5457 throwIllegalSignature("Method", name, signature, CHECK_0);
5458 return 0;
5459 }
5460
5461 int ClassFileParser::static_field_size() const {
5462 assert(_field_info != NULL, "invariant");
5463 return _field_info->static_field_size;
5464 }
5465
5466 int ClassFileParser::total_oop_map_count() const {
5467 assert(_field_info != NULL, "invariant");
5468 return _field_info->oop_map_blocks->nonstatic_oop_map_count;
5469 }
5470
5471 jint ClassFileParser::layout_size() const {
5472 assert(_field_info != NULL, "invariant");
5473 return _field_info->instance_size;
5474 }
5475
5476 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5477 const Array<Method*>* methods) {
5478 assert(ik != NULL, "invariant");
5479 assert(methods != NULL, "invariant");
5480
5481 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5482 // (We used to do this lazily, but now we query it in Rewriter,
5483 // which is eagerly done for every method, so we might as well do it now,
5484 // when everything is fresh in memory.)
5485 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5486
5487 if (klass_id != vmSymbols::NO_SID) {
5488 for (int j = 0; j < methods->length(); ++j) {
5489 Method* method = methods->at(j);
5490 method->init_intrinsic_id();
5491
5492 if (CheckIntrinsics) {
5493 // Check if an intrinsic is defined for method 'method',
5494 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5495 if (method->intrinsic_id() != vmIntrinsics::_none &&
5496 !method->intrinsic_candidate()) {
5497 tty->print("Compiler intrinsic is defined for method [%s], "
5498 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5499 method->name_and_sig_as_C_string(),
5500 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5501 );
5502 tty->cr();
5503 DEBUG_ONLY(vm_exit(1));
5504 }
5505 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5506 // but there is no intrinsic available for it.
5507 if (method->intrinsic_candidate() &&
5508 method->intrinsic_id() == vmIntrinsics::_none) {
5509 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5510 "but no compiler intrinsic is defined for the method.%s",
5511 method->name_and_sig_as_C_string(),
5512 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5513 );
5514 tty->cr();
5515 DEBUG_ONLY(vm_exit(1));
5516 }
5517 }
5518 } // end for
5519
5520 #ifdef ASSERT
5521 if (CheckIntrinsics) {
5522 // Check for orphan methods in the current class. A method m
5523 // of a class C is orphan if an intrinsic is defined for method m,
5524 // but class C does not declare m.
5525 // The check is potentially expensive, therefore it is available
5526 // only in debug builds.
5527
5528 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5529 if (vmIntrinsics::_compiledLambdaForm == id) {
5530 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5531 // generated for the JVM from a LambdaForm and therefore no method
5532 // is defined for it.
5533 continue;
5534 }
5535
5536 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5537 // Check if the current class contains a method with the same
5538 // name, flags, signature.
5539 bool match = false;
5540 for (int j = 0; j < methods->length(); ++j) {
5541 const Method* method = methods->at(j);
5542 if (method->intrinsic_id() == id) {
5543 match = true;
5544 break;
5545 }
5546 }
5547
5548 if (!match) {
5549 char buf[1000];
5550 tty->print("Compiler intrinsic is defined for method [%s], "
5551 "but the method is not available in class [%s].%s",
5552 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5553 buf, sizeof(buf)),
5554 ik->name()->as_C_string(),
5555 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5556 );
5557 tty->cr();
5558 DEBUG_ONLY(vm_exit(1));
5559 }
5560 }
5561 } // end for
5562 } // CheckIntrinsics
5563 #endif // ASSERT
5564 }
5565 }
5566
5567 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5568 if (_klass != NULL) {
5569 return _klass;
5570 }
5571
5572 InstanceKlass* const ik =
5573 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5574
5575 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5576
5577 assert(_klass == ik, "invariant");
5578
5579 ik->set_has_passed_fingerprint_check(false);
5580 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5581 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5582 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5583 // This class matches with a class saved in an AOT library
5584 ik->set_has_passed_fingerprint_check(true);
5585 } else {
5586 ResourceMark rm;
5587 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5588 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5589 }
5590 }
5591
5592 if (ik->is_value()) {
5593 ValueKlass* vk = ValueKlass::cast(ik);
5594 oop val = ik->allocate_instance(CHECK_NULL);
5595 vk->set_default_value(val);
5596 }
5597
5598 return ik;
5599 }
5600
5601 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5602 assert(ik != NULL, "invariant");
5603
5604 set_klass_to_deallocate(ik);
5605
5606 assert(_field_info != NULL, "invariant");
5607 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5608 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->nonstatic_oop_map_count,
5609 "sanity");
5610
5611 assert(ik->is_instance_klass(), "sanity");
5612 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5613
5614 // Fill in information already parsed
5615 ik->set_should_verify_class(_need_verify);
5616
5617 // Not yet: supers are done below to support the new subtype-checking fields
5618 ik->set_class_loader_data(_loader_data);
5619 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5620 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5621 assert(_fac != NULL, "invariant");
5622 ik->set_static_oop_field_count(_fac->count[STATIC_OOP] + _fac->count[STATIC_FLATTENABLE]);
5623
5624 // this transfers ownership of a lot of arrays from
5625 // the parser onto the InstanceKlass*
5626 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5627
5628 // note that is not safe to use the fields in the parser from this point on
5629 assert(NULL == _cp, "invariant");
5630 assert(NULL == _fields, "invariant");
5631 assert(NULL == _methods, "invariant");
5632 assert(NULL == _inner_classes, "invariant");
5633 assert(NULL == _local_interfaces, "invariant");
5634 assert(NULL == _transitive_interfaces, "invariant");
5635 assert(NULL == _combined_annotations, "invariant");
5636
5637 if (_has_final_method) {
5638 ik->set_has_final_method();
5639 }
5640
5641 ik->copy_method_ordering(_method_ordering, CHECK);
5642 // The InstanceKlass::_methods_jmethod_ids cache
5643 // is managed on the assumption that the initial cache
5644 // size is equal to the number of methods in the class. If
5645 // that changes, then InstanceKlass::idnum_can_increment()
5646 // has to be changed accordingly.
5647 ik->set_initial_method_idnum(ik->methods()->length());
5648
5649 ik->set_name(_class_name);
5650
5651 if (is_anonymous()) {
5652 // _this_class_index is a CONSTANT_Class entry that refers to this
5653 // anonymous class itself. If this class needs to refer to its own methods or
5654 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5655 // _this_class_index. However, because this class is anonymous (it's
5656 // not stored in SystemDictionary), _this_class_index cannot be resolved
5657 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5658 // Therefore, we must eagerly resolve _this_class_index now.
5659 ik->constants()->klass_at_put(_this_class_index, ik);
5660 }
5661
5662 ik->set_minor_version(_minor_version);
5663 ik->set_major_version(_major_version);
5664 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5665 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5666
5667 if (_host_klass != NULL) {
5668 assert (ik->is_anonymous(), "should be the same");
5669 ik->set_host_klass(_host_klass);
5670 }
5671
5672 // Set PackageEntry for this_klass
5673 oop cl = ik->class_loader();
5674 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5675 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5676 ik->set_package(cld, CHECK);
5677
5678 const Array<Method*>* const methods = ik->methods();
5679 assert(methods != NULL, "invariant");
5680 const int methods_len = methods->length();
5681
5682 check_methods_for_intrinsics(ik, methods);
5683
5684 // Fill in field values obtained by parse_classfile_attributes
5685 if (_parsed_annotations->has_any_annotations()) {
5686 _parsed_annotations->apply_to(ik);
5687 }
5688
5689 apply_parsed_class_attributes(ik);
5690
5691 // Miranda methods
5692 if ((_num_miranda_methods > 0) ||
5693 // if this class introduced new miranda methods or
5694 (_super_klass != NULL && _super_klass->has_miranda_methods())
5695 // super class exists and this class inherited miranda methods
5696 ) {
5697 ik->set_has_miranda_methods(); // then set a flag
5698 }
5699
5700 // Fill in information needed to compute superclasses.
5701 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5702
5703 // Initialize itable offset tables
5704 klassItable::setup_itable_offset_table(ik);
5705
5706 // Compute transitive closure of interfaces this class implements
5707 // Do final class setup
5708 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5709 if (oop_map_blocks->nonstatic_oop_map_count > 0) {
5710 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5711 }
5712
5713 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5714 set_precomputed_flags(ik);
5715
5716 // check if this class can access its super class
5717 check_super_class_access(ik, CHECK);
5718
5719 // check if this class can access its superinterfaces
5720 check_super_interface_access(ik, CHECK);
5721
5722 // check if this class overrides any final method
5723 check_final_method_override(ik, CHECK);
5724
5725 // reject static interface methods prior to Java 8
5726 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5727 check_illegal_static_method(ik, CHECK);
5728 }
5729
5730 // Obtain this_klass' module entry
5731 ModuleEntry* module_entry = ik->module();
5732 assert(module_entry != NULL, "module_entry should always be set");
5733
5734 // Obtain java.lang.Module
5735 Handle module_handle(THREAD, module_entry->module());
5736
5737 // Allocate mirror and initialize static fields
5738 // The create_mirror() call will also call compute_modifiers()
5739 java_lang_Class::create_mirror(ik,
5740 Handle(THREAD, _loader_data->class_loader()),
5741 module_handle,
5742 _protection_domain,
5743 CHECK);
5744
5745 assert(_all_mirandas != NULL, "invariant");
5746
5747 // Generate any default methods - default methods are public interface methods
5748 // that have a default implementation. This is new with Java 8.
5749 if (_has_nonstatic_concrete_methods) {
5750 DefaultMethods::generate_default_methods(ik,
5751 _all_mirandas,
5752 CHECK);
5753 }
5754
5755 if (is_value_type()) {
5756 ValueKlass* vk = ValueKlass::cast(ik);
5757 vk->set_if_bufferable();
5758 vk->initialize_calling_convention();
5759 }
5760
5761 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5762 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5763 !module_entry->has_default_read_edges()) {
5764 if (!module_entry->set_has_default_read_edges()) {
5765 // We won a potential race
5766 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5767 }
5768 }
5769
5770 int nfields = ik->java_fields_count();
5771 if (ik->is_value()) nfields++;
5772 for(int i = 0; i < nfields; i++) {
5773 if (ik->field_access_flags(i) & JVM_ACC_FLATTENABLE) {
5774 Klass* klass = SystemDictionary::resolve_or_fail(ik->field_signature(i),
5775 Handle(THREAD, ik->class_loader()),
5776 Handle(THREAD, ik->protection_domain()), true, CHECK);
5777 assert(klass != NULL, "Sanity check");
5778 assert(klass->access_flags().is_value_type(), "Value type expected");
5779 ik->set_value_field_klass(i, klass);
5780 } else if (is_value_type() && ((ik->field_access_flags(i) & JVM_ACC_FIELD_INTERNAL) != 0)
5781 && ((ik->field_access_flags(i) & JVM_ACC_STATIC) != 0)) {
5782 ValueKlass::cast(ik)->set_default_value_offset(ik->field_offset(i));
5783 }
5784 }
5785
5786 // Update the loader_data graph.
5787 record_defined_class_dependencies(ik, CHECK);
5788
5789 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5790
5791 if (!is_internal()) {
5792 if (log_is_enabled(Info, class, load)) {
5793 ResourceMark rm;
5794 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5795 ik->print_class_load_logging(_loader_data, module_name, _stream);
5796 }
5797
5798 if (log_is_enabled(Debug, class, resolve)) {
5799 ResourceMark rm;
5800 // print out the superclass.
5801 const char * from = ik->external_name();
5802 if (ik->java_super() != NULL) {
5803 log_debug(class, resolve)("%s %s (super)",
5804 from,
5805 ik->java_super()->external_name());
5806 }
5807 // print out each of the interface classes referred to by this class.
5808 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5809 if (local_interfaces != NULL) {
5810 const int length = local_interfaces->length();
5811 for (int i = 0; i < length; i++) {
5812 const Klass* const k = local_interfaces->at(i);
5813 const char * to = k->external_name();
5814 log_debug(class, resolve)("%s %s (interface)", from, to);
5815 }
5816 }
5817 }
5818 }
5819
5820 TRACE_INIT_ID(ik);
5821
5822 // If we reach here, all is well.
5823 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5824 // in order for it to not be destroyed in the ClassFileParser destructor.
5825 set_klass_to_deallocate(NULL);
5826
5827 // it's official
5828 set_klass(ik);
5829
5830 debug_only(ik->verify();)
5831 }
5832
5833 // For an anonymous class that is in the unnamed package, move it to its host class's
5834 // package by prepending its host class's package name to its class name and setting
5835 // its _class_name field.
5836 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5837 ResourceMark rm(THREAD);
5838 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5839 "Anonymous class should not be in a package");
5840 const char* host_pkg_name =
5841 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5842
5843 if (host_pkg_name != NULL) {
5844 size_t host_pkg_len = strlen(host_pkg_name);
5845 int class_name_len = _class_name->utf8_length();
5846 char* new_anon_name =
5847 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5848 // Copy host package name and trailing /.
5849 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5850 new_anon_name[host_pkg_len] = '/';
5851 // Append anonymous class name. The anonymous class name can contain odd
5852 // characters. So, do a strncpy instead of using sprintf("%s...").
5853 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5854
5855 // Create a symbol and update the anonymous class name.
5856 _class_name = SymbolTable::new_symbol(new_anon_name,
5857 (int)host_pkg_len + 1 + class_name_len,
5858 CHECK);
5859 }
5860 }
5861
5862 // If the host class and the anonymous class are in the same package then do
5863 // nothing. If the anonymous class is in the unnamed package then move it to its
5864 // host's package. If the classes are in different packages then throw an IAE
5865 // exception.
5866 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5867 assert(_host_klass != NULL, "Expected an anonymous class");
5868
5869 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5870 _class_name->utf8_length(), '/');
5871 if (anon_last_slash == NULL) { // Unnamed package
5872 prepend_host_package_name(_host_klass, CHECK);
5873 } else {
5874 if (!_host_klass->is_same_class_package(_host_klass->class_loader(), _class_name)) {
5875 ResourceMark rm(THREAD);
5876 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5877 err_msg("Host class %s and anonymous class %s are in different packages",
5878 _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5879 }
5880 }
5881 }
5882
5883 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5884 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5885 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5886 bool need_verify =
5887 // verifyAll
5888 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5889 // verifyRemote
5890 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5891 return !need_verify;
5892 }
5893
5894 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5895 Symbol* name,
5896 ClassLoaderData* loader_data,
5897 Handle protection_domain,
5898 const InstanceKlass* host_klass,
5899 GrowableArray<Handle>* cp_patches,
5900 Publicity pub_level,
5901 TRAPS) :
5902 _stream(stream),
5903 _requested_name(name),
5904 _loader_data(loader_data),
5905 _host_klass(host_klass),
5906 _cp_patches(cp_patches),
5907 _num_patched_klasses(0),
5908 _max_num_patched_klasses(0),
5909 _orig_cp_size(0),
5910 _first_patched_klass_resolved_index(0),
5911 _super_klass(),
5912 _cp(NULL),
5913 _fields(NULL),
5914 _methods(NULL),
5915 _inner_classes(NULL),
5916 _local_interfaces(NULL),
5917 _transitive_interfaces(NULL),
5918 _combined_annotations(NULL),
5919 _annotations(NULL),
5920 _type_annotations(NULL),
5921 _fields_annotations(NULL),
5922 _fields_type_annotations(NULL),
5923 _klass(NULL),
5924 _klass_to_deallocate(NULL),
5925 _parsed_annotations(NULL),
5926 _fac(NULL),
5927 _field_info(NULL),
5928 _method_ordering(NULL),
5929 _all_mirandas(NULL),
5930 _vtable_size(0),
5931 _itable_size(0),
5932 _num_miranda_methods(0),
5933 _rt(REF_NONE),
5934 _protection_domain(protection_domain),
5935 _access_flags(),
5936 _pub_level(pub_level),
5937 _bad_constant_seen(0),
5938 _synthetic_flag(false),
5939 _sde_length(false),
5940 _sde_buffer(NULL),
5941 _sourcefile_index(0),
5942 _generic_signature_index(0),
5943 _major_version(0),
5944 _minor_version(0),
5945 _this_class_index(0),
5946 _super_class_index(0),
5947 _itfs_len(0),
5948 _java_fields_count(0),
5949 _need_verify(false),
5950 _relax_verify(false),
5951 _has_nonstatic_concrete_methods(false),
5952 _declares_nonstatic_concrete_methods(false),
5953 _has_final_method(false),
5954 _has_finalizer(false),
5955 _has_empty_finalizer(false),
5956 _has_vanilla_constructor(false),
5957 _max_bootstrap_specifier_index(-1),
5958 _has_flattenable_fields(false) {
5959
5960 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5961
5962 assert(THREAD->is_Java_thread(), "invariant");
5963 assert(_loader_data != NULL, "invariant");
5964 assert(stream != NULL, "invariant");
5965 assert(_stream != NULL, "invariant");
5966 assert(_stream->buffer() == _stream->current(), "invariant");
5967 assert(_class_name != NULL, "invariant");
5968 assert(0 == _access_flags.as_int(), "invariant");
5969
5970 // Figure out whether we can skip format checking (matching classic VM behavior)
5971 if (DumpSharedSpaces) {
5972 // verify == true means it's a 'remote' class (i.e., non-boot class)
5973 // Verification decision is based on BytecodeVerificationRemote flag
5974 // for those classes.
5975 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5976 BytecodeVerificationLocal;
5977 }
5978 else {
5979 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5980 stream->need_verify());
5981 }
5982 if (_cp_patches != NULL) {
5983 int len = _cp_patches->length();
5984 for (int i=0; i<len; i++) {
5985 if (has_cp_patch_at(i)) {
5986 Handle patch = cp_patch_at(i);
5987 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5988 // We need to append the names of the patched classes to the end of the constant pool,
5989 // because a patched class may have a Utf8 name that's not already included in the
5990 // original constant pool. These class names are used when patch_constant_pool()
5991 // calls patch_class().
5992 //
5993 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5994 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5995 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5996 _max_num_patched_klasses++;
5997 }
5998 }
5999 }
6000 }
6001
6002 // synch back verification state to stream
6003 stream->set_verify(_need_verify);
6004
6005 // Check if verification needs to be relaxed for this class file
6006 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
6007 _relax_verify = relax_format_check_for(_loader_data);
6008
6009 parse_stream(stream, CHECK);
6010
6011 post_process_parsed_stream(stream, _cp, CHECK);
6012 }
6013
6014 void ClassFileParser::clear_class_metadata() {
6015 // metadata created before the instance klass is created. Must be
6016 // deallocated if classfile parsing returns an error.
6017 _cp = NULL;
6018 _fields = NULL;
6019 _methods = NULL;
6020 _inner_classes = NULL;
6021 _local_interfaces = NULL;
6022 _transitive_interfaces = NULL;
6023 _combined_annotations = NULL;
6024 _annotations = _type_annotations = NULL;
6025 _fields_annotations = _fields_type_annotations = NULL;
6026 }
6027
6028 // Destructor to clean up
6029 ClassFileParser::~ClassFileParser() {
6030 if (_cp != NULL) {
6031 MetadataFactory::free_metadata(_loader_data, _cp);
6032 }
6033 if (_fields != NULL) {
6034 MetadataFactory::free_array<u2>(_loader_data, _fields);
6035 }
6036
6037 if (_methods != NULL) {
6038 // Free methods
6039 InstanceKlass::deallocate_methods(_loader_data, _methods);
6040 }
6041
6042 // beware of the Universe::empty_blah_array!!
6043 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
6044 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
6045 }
6046
6047 // Free interfaces
6048 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
6049 _local_interfaces, _transitive_interfaces);
6050
6051 if (_combined_annotations != NULL) {
6052 // After all annotations arrays have been created, they are installed into the
6053 // Annotations object that will be assigned to the InstanceKlass being created.
6054
6055 // Deallocate the Annotations object and the installed annotations arrays.
6056 _combined_annotations->deallocate_contents(_loader_data);
6057
6058 // If the _combined_annotations pointer is non-NULL,
6059 // then the other annotations fields should have been cleared.
6060 assert(_annotations == NULL, "Should have been cleared");
6061 assert(_type_annotations == NULL, "Should have been cleared");
6062 assert(_fields_annotations == NULL, "Should have been cleared");
6063 assert(_fields_type_annotations == NULL, "Should have been cleared");
6064 } else {
6065 // If the annotations arrays were not installed into the Annotations object,
6066 // then they have to be deallocated explicitly.
6067 MetadataFactory::free_array<u1>(_loader_data, _annotations);
6068 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
6069 Annotations::free_contents(_loader_data, _fields_annotations);
6070 Annotations::free_contents(_loader_data, _fields_type_annotations);
6071 }
6072
6073 clear_class_metadata();
6074
6075 // deallocate the klass if already created. Don't directly deallocate, but add
6076 // to the deallocate list so that the klass is removed from the CLD::_klasses list
6077 // at a safepoint.
6078 if (_klass_to_deallocate != NULL) {
6079 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6080 }
6081 }
6082
6083 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6084 TRAPS) {
6085
6086 assert(stream != NULL, "invariant");
6087 assert(_class_name != NULL, "invariant");
6088
6089 // BEGIN STREAM PARSING
6090 stream->guarantee_more(8, CHECK); // magic, major, minor
6091 // Magic value
6092 const u4 magic = stream->get_u4_fast();
6093 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6094 "Incompatible magic value %u in class file %s",
6095 magic, CHECK);
6096
6097 // Version numbers
6098 _minor_version = stream->get_u2_fast();
6099 _major_version = stream->get_u2_fast();
6100
6101 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
6102 ResourceMark rm;
6103 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
6104 _major_version, _minor_version, _class_name->as_C_string());
6105 Exceptions::fthrow(
6106 THREAD_AND_LOCATION,
6107 vmSymbols::java_lang_UnsupportedClassVersionError(),
6108 "Unsupported major.minor version for dump time %u.%u",
6109 _major_version,
6110 _minor_version);
6111 }
6112
6113 // Check version numbers - we check this even with verifier off
6114 if (!is_supported_version(_major_version, _minor_version)) {
6115 ResourceMark rm(THREAD);
6116 Exceptions::fthrow(
6117 THREAD_AND_LOCATION,
6118 vmSymbols::java_lang_UnsupportedClassVersionError(),
6119 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
6120 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
6121 _class_name->as_C_string(),
6122 _major_version,
6123 _minor_version,
6124 JVM_CLASSFILE_MAJOR_VERSION,
6125 JVM_CLASSFILE_MINOR_VERSION);
6126 return;
6127 }
6128
6129 stream->guarantee_more(3, CHECK); // length, first cp tag
6130 u2 cp_size = stream->get_u2_fast();
6131
6132 guarantee_property(
6133 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6134 cp_size, CHECK);
6135
6136 _orig_cp_size = cp_size;
6137 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6138 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6139 }
6140 cp_size += _max_num_patched_klasses;
6141
6142 _cp = ConstantPool::allocate(_loader_data,
6143 cp_size,
6144 CHECK);
6145
6146 ConstantPool* const cp = _cp;
6147
6148 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6149
6150 assert(cp_size == (const u2)cp->length(), "invariant");
6151
6152 // ACCESS FLAGS
6153 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6154
6155 jint recognized_modifiers = JVM_RECOGNIZED_CLASS_MODIFIERS;
6156 // JVM_ACC_MODULE is defined in JDK-9 and later.
6157 if (_major_version >= JAVA_9_VERSION) {
6158 recognized_modifiers |= JVM_ACC_MODULE;
6159 }
6160 // JVM_ACC_VALUE is defined for class file version 53.1 and later
6161 if (supports_value_types()) {
6162 recognized_modifiers |= JVM_ACC_VALUE;
6163 }
6164
6165 // Access flags
6166 jint flags = stream->get_u2_fast() & recognized_modifiers;
6167
6168 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6169 // Set abstract bit for old class files for backward compatibility
6170 flags |= JVM_ACC_ABSTRACT;
6171 }
6172
6173 verify_legal_class_modifiers(flags, CHECK);
6174
6175 short bad_constant = class_bad_constant_seen();
6176 if (bad_constant != 0) {
6177 // Do not throw CFE until after the access_flags are checked because if
6178 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6179 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6180 }
6181
6182 _access_flags.set_flags(flags);
6183
6184 // This class and superclass
6185 _this_class_index = stream->get_u2_fast();
6186 check_property(
6187 (valid_cp_range(_this_class_index, cp_size) &&
6188 (cp->tag_at(_this_class_index).is_unresolved_klass() ||
6189 cp->tag_at(_this_class_index).is_unresolved_value_type())),
6190 "Invalid this class index %u in constant pool in class file %s",
6191 _this_class_index, CHECK);
6192
6193 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6194 assert(class_name_in_cp != NULL, "class_name can't be null");
6195
6196 // Update _class_name which could be null previously
6197 // to reflect the name in the constant pool
6198 _class_name = class_name_in_cp;
6199
6200 // Don't need to check whether this class name is legal or not.
6201 // It has been checked when constant pool is parsed.
6202 // However, make sure it is not an array type.
6203 if (_need_verify) {
6204 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
6205 "Bad class name in class file %s",
6206 CHECK);
6207 }
6208
6209 // Checks if name in class file matches requested name
6210 if (_requested_name != NULL && _requested_name != _class_name) {
6211 ResourceMark rm(THREAD);
6212 Exceptions::fthrow(
6213 THREAD_AND_LOCATION,
6214 vmSymbols::java_lang_NoClassDefFoundError(),
6215 "%s (wrong name: %s)",
6216 _class_name->as_C_string(),
6217 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6218 );
6219 return;
6220 }
6221
6222 // if this is an anonymous class fix up its name if it's in the unnamed
6223 // package. Otherwise, throw IAE if it is in a different package than
6224 // its host class.
6225 if (_host_klass != NULL) {
6226 fix_anonymous_class_name(CHECK);
6227 }
6228
6229 // Verification prevents us from creating names with dots in them, this
6230 // asserts that that's the case.
6231 assert(is_internal_format(_class_name), "external class name format used internally");
6232
6233 if (!is_internal()) {
6234 LogTarget(Debug, class, preorder) lt;
6235 if (lt.is_enabled()){
6236 ResourceMark rm(THREAD);
6237 LogStream ls(lt);
6238 ls.print("%s", _class_name->as_klass_external_name());
6239 if (stream->source() != NULL) {
6240 ls.print(" source: %s", stream->source());
6241 }
6242 ls.cr();
6243 }
6244
6245 #if INCLUDE_CDS
6246 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6247 if (!ClassLoader::has_jrt_entry()) {
6248 warning("DumpLoadedClassList and CDS are not supported in exploded build");
6249 DumpLoadedClassList = NULL;
6250 } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6251 _host_klass == NULL) {
6252 // Only dump the classes that can be stored into CDS archive.
6253 // Anonymous classes such as generated LambdaForm classes are also not included.
6254 oop class_loader = _loader_data->class_loader();
6255 ResourceMark rm(THREAD);
6256 bool skip = false;
6257 if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6258 // For the boot and platform class loaders, skip classes that are not found in the
6259 // java runtime image, such as those found in the --patch-module entries.
6260 // These classes can't be loaded from the archive during runtime.
6261 if (!ClassLoader::is_modules_image(stream->source()) && strncmp(stream->source(), "jrt:", 4) != 0) {
6262 skip = true;
6263 }
6264
6265 if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6266 // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6267 // as they can be loaded from the archive during runtime.
6268 skip = false;
6269 }
6270 }
6271 if (skip) {
6272 tty->print_cr("skip writing class %s from source %s to classlist file",
6273 _class_name->as_C_string(), stream->source());
6274 } else {
6275 classlist_file->print_cr("%s", _class_name->as_C_string());
6276 classlist_file->flush();
6277 }
6278 }
6279 }
6280 #endif
6281 }
6282
6283 // SUPERKLASS
6284 _super_class_index = stream->get_u2_fast();
6285 _super_klass = parse_super_class(cp,
6286 _super_class_index,
6287 _need_verify,
6288 CHECK);
6289
6290 // Interfaces
6291 _itfs_len = stream->get_u2_fast();
6292 parse_interfaces(stream,
6293 _itfs_len,
6294 cp,
6295 &_has_nonstatic_concrete_methods,
6296 CHECK);
6297
6298 assert(_local_interfaces != NULL, "invariant");
6299
6300 // Fields (offsets are filled in later)
6301 _fac = new FieldAllocationCount();
6302 parse_fields(stream,
6303 _access_flags.is_interface(),
6304 _access_flags.is_value_type(),
6305 _fac,
6306 cp,
6307 cp_size,
6308 &_java_fields_count,
6309 CHECK);
6310
6311 assert(_fields != NULL, "invariant");
6312
6313 // Methods
6314 AccessFlags promoted_flags;
6315 parse_methods(stream,
6316 _access_flags.is_interface(),
6317 &promoted_flags,
6318 &_has_final_method,
6319 &_declares_nonstatic_concrete_methods,
6320 CHECK);
6321
6322 assert(_methods != NULL, "invariant");
6323
6324 // promote flags from parse_methods() to the klass' flags
6325 _access_flags.add_promoted_flags(promoted_flags.as_int());
6326
6327 if (_declares_nonstatic_concrete_methods) {
6328 _has_nonstatic_concrete_methods = true;
6329 }
6330
6331 // Additional attributes/annotations
6332 _parsed_annotations = new ClassAnnotationCollector();
6333 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6334
6335 assert(_inner_classes != NULL, "invariant");
6336
6337 // Finalize the Annotations metadata object,
6338 // now that all annotation arrays have been created.
6339 create_combined_annotations(CHECK);
6340
6341 // Make sure this is the end of class file stream
6342 guarantee_property(stream->at_eos(),
6343 "Extra bytes at the end of class file %s",
6344 CHECK);
6345
6346 // all bytes in stream read and parsed
6347 }
6348
6349 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6350 ConstantPool* cp,
6351 TRAPS) {
6352 assert(stream != NULL, "invariant");
6353 assert(stream->at_eos(), "invariant");
6354 assert(cp != NULL, "invariant");
6355 assert(_loader_data != NULL, "invariant");
6356
6357 if (_class_name == vmSymbols::java_lang_Object()) {
6358 check_property(_local_interfaces == Universe::the_empty_klass_array(),
6359 "java.lang.Object cannot implement an interface in class file %s",
6360 CHECK);
6361 }
6362 // We check super class after class file is parsed and format is checked
6363 if (_super_class_index > 0 && NULL ==_super_klass) {
6364 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6365 if (_access_flags.is_interface()) {
6366 // Before attempting to resolve the superclass, check for class format
6367 // errors not checked yet.
6368 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6369 "Interfaces must have java.lang.Object as superclass in class file %s",
6370 CHECK);
6371 }
6372 Handle loader(THREAD, _loader_data->class_loader());
6373 _super_klass = (const InstanceKlass*)
6374 SystemDictionary::resolve_super_or_fail(_class_name,
6375 super_class_name,
6376 loader,
6377 _protection_domain,
6378 true,
6379 CHECK);
6380 }
6381
6382 if (_super_klass != NULL) {
6383 if (_super_klass->has_nonstatic_concrete_methods()) {
6384 _has_nonstatic_concrete_methods = true;
6385 }
6386
6387 if (_super_klass->is_interface()) {
6388 ResourceMark rm(THREAD);
6389 Exceptions::fthrow(
6390 THREAD_AND_LOCATION,
6391 vmSymbols::java_lang_IncompatibleClassChangeError(),
6392 "class %s has interface %s as super class",
6393 _class_name->as_klass_external_name(),
6394 _super_klass->external_name()
6395 );
6396 return;
6397 }
6398
6399 // For a value class, only java/lang/Object is an acceptable super class
6400 if ((EnableValhalla || EnableMVT) &&
6401 _access_flags.get_flags() & JVM_ACC_VALUE) {
6402 guarantee_property(_super_klass->name() == vmSymbols::java_lang_Object(),
6403 "Value class can only inherit java/lang/Object",
6404 CHECK);
6405 }
6406
6407 // Make sure super class is not final
6408 if (_super_klass->is_final()) {
6409 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6410 }
6411 }
6412
6413 // Compute the transitive list of all unique interfaces implemented by this class
6414 _transitive_interfaces =
6415 compute_transitive_interfaces(_super_klass,
6416 _local_interfaces,
6417 _loader_data,
6418 CHECK);
6419
6420 assert(_transitive_interfaces != NULL, "invariant");
6421
6422 // sort methods
6423 _method_ordering = sort_methods(_methods);
6424
6425 _all_mirandas = new GrowableArray<Method*>(20);
6426
6427 Handle loader(THREAD, _loader_data->class_loader());
6428 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6429 &_num_miranda_methods,
6430 _all_mirandas,
6431 _super_klass,
6432 _methods,
6433 _access_flags,
6434 _major_version,
6435 loader,
6436 _class_name,
6437 _local_interfaces,
6438 CHECK);
6439
6440 // Size of Java itable (in words)
6441 _itable_size = _access_flags.is_interface() ? 0 :
6442 klassItable::compute_itable_size(_transitive_interfaces);
6443
6444 assert(_fac != NULL, "invariant");
6445 assert(_parsed_annotations != NULL, "invariant");
6446
6447 _field_info = new FieldLayoutInfo();
6448 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6449
6450 // Compute reference typ
6451 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6452
6453 }
6454
6455 void ClassFileParser::set_klass(InstanceKlass* klass) {
6456
6457 #ifdef ASSERT
6458 if (klass != NULL) {
6459 assert(NULL == _klass, "leaking?");
6460 }
6461 #endif
6462
6463 _klass = klass;
6464 }
6465
6466 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6467
6468 #ifdef ASSERT
6469 if (klass != NULL) {
6470 assert(NULL == _klass_to_deallocate, "leaking?");
6471 }
6472 #endif
6473
6474 _klass_to_deallocate = klass;
6475 }
6476
6477 // Caller responsible for ResourceMark
6478 // clone stream with rewound position
6479 const ClassFileStream* ClassFileParser::clone_stream() const {
6480 assert(_stream != NULL, "invariant");
6481
6482 return _stream->clone();
6483 }
6484
6485 // ----------------------------------------------------------------------------
6486 // debugging
6487
6488 #ifdef ASSERT
6489
6490 // return true if class_name contains no '.' (internal format is '/')
6491 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6492 if (class_name != NULL) {
6493 ResourceMark rm;
6494 char* name = class_name->as_C_string();
6495 return strchr(name, '.') == NULL;
6496 } else {
6497 return true;
6498 }
6499 }
6500
6501 #endif