1 /*
2 * Copyright (c) 1997, 2018, 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_Fieldref: {
160 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
161 const u2 class_index = cfs->get_u2_fast();
162 const u2 name_and_type_index = cfs->get_u2_fast();
163 cp->field_at_put(index, class_index, name_and_type_index);
164 break;
165 }
166 case JVM_CONSTANT_Methodref: {
167 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
168 const u2 class_index = cfs->get_u2_fast();
169 const u2 name_and_type_index = cfs->get_u2_fast();
170 cp->method_at_put(index, class_index, name_and_type_index);
171 break;
172 }
173 case JVM_CONSTANT_InterfaceMethodref: {
174 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
175 const u2 class_index = cfs->get_u2_fast();
176 const u2 name_and_type_index = cfs->get_u2_fast();
177 cp->interface_method_at_put(index, class_index, name_and_type_index);
178 break;
179 }
180 case JVM_CONSTANT_String : {
181 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
182 const u2 string_index = cfs->get_u2_fast();
183 cp->string_index_at_put(index, string_index);
184 break;
185 }
186 case JVM_CONSTANT_MethodHandle :
187 case JVM_CONSTANT_MethodType: {
188 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
189 classfile_parse_error(
190 "Class file version does not support constant tag %u in class file %s",
191 tag, CHECK);
192 }
193 if (tag == JVM_CONSTANT_MethodHandle) {
194 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
195 const u1 ref_kind = cfs->get_u1_fast();
196 const u2 method_index = cfs->get_u2_fast();
197 cp->method_handle_index_at_put(index, ref_kind, method_index);
198 }
199 else if (tag == JVM_CONSTANT_MethodType) {
200 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
201 const u2 signature_index = cfs->get_u2_fast();
202 cp->method_type_index_at_put(index, signature_index);
203 }
204 else {
205 ShouldNotReachHere();
206 }
207 break;
208 }
209 case JVM_CONSTANT_Dynamic : {
210 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
211 classfile_parse_error(
212 "Class file version does not support constant tag %u in class file %s",
213 tag, CHECK);
214 }
215 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
216 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
217 const u2 name_and_type_index = cfs->get_u2_fast();
218 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
219 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
220 }
221 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
222 break;
223 }
224 case JVM_CONSTANT_InvokeDynamic : {
225 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
226 classfile_parse_error(
227 "Class file version does not support constant tag %u in class file %s",
228 tag, CHECK);
229 }
230 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
231 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
232 const u2 name_and_type_index = cfs->get_u2_fast();
233 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
234 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
235 }
236 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
237 break;
238 }
239 case JVM_CONSTANT_Integer: {
240 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
241 const u4 bytes = cfs->get_u4_fast();
242 cp->int_at_put(index, (jint)bytes);
243 break;
244 }
245 case JVM_CONSTANT_Float: {
246 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
247 const u4 bytes = cfs->get_u4_fast();
248 cp->float_at_put(index, *(jfloat*)&bytes);
249 break;
250 }
251 case JVM_CONSTANT_Long: {
252 // A mangled type might cause you to overrun allocated memory
253 guarantee_property(index + 1 < length,
254 "Invalid constant pool entry %u in class file %s",
255 index,
256 CHECK);
257 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
258 const u8 bytes = cfs->get_u8_fast();
259 cp->long_at_put(index, bytes);
260 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
261 break;
262 }
263 case JVM_CONSTANT_Double: {
264 // A mangled type might cause you to overrun allocated memory
265 guarantee_property(index+1 < length,
266 "Invalid constant pool entry %u in class file %s",
267 index,
268 CHECK);
269 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
270 const u8 bytes = cfs->get_u8_fast();
271 cp->double_at_put(index, *(jdouble*)&bytes);
272 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
273 break;
274 }
275 case JVM_CONSTANT_NameAndType: {
276 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
277 const u2 name_index = cfs->get_u2_fast();
278 const u2 signature_index = cfs->get_u2_fast();
279 cp->name_and_type_at_put(index, name_index, signature_index);
280 break;
281 }
282 case JVM_CONSTANT_Utf8 : {
283 cfs->guarantee_more(2, CHECK); // utf8_length
284 u2 utf8_length = cfs->get_u2_fast();
285 const u1* utf8_buffer = cfs->current();
286 assert(utf8_buffer != NULL, "null utf8 buffer");
287 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
288 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
289 cfs->skip_u1_fast(utf8_length);
290
291 // Before storing the symbol, make sure it's legal
292 if (_need_verify) {
293 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
294 }
295
296 if (has_cp_patch_at(index)) {
297 Handle patch = clear_cp_patch_at(index);
298 guarantee_property(java_lang_String::is_instance(patch()),
299 "Illegal utf8 patch at %d in class file %s",
300 index,
301 CHECK);
302 const char* const str = java_lang_String::as_utf8_string(patch());
303 // (could use java_lang_String::as_symbol instead, but might as well batch them)
304 utf8_buffer = (const u1*) str;
305 utf8_length = (int) strlen(str);
306 }
307
308 unsigned int hash;
309 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
310 utf8_length,
311 hash);
312 if (result == NULL) {
313 names[names_count] = (const char*)utf8_buffer;
314 lengths[names_count] = utf8_length;
315 indices[names_count] = index;
316 hashValues[names_count++] = hash;
317 if (names_count == SymbolTable::symbol_alloc_batch_size) {
318 SymbolTable::new_symbols(_loader_data,
319 cp,
320 names_count,
321 names,
322 lengths,
323 indices,
324 hashValues,
325 CHECK);
326 names_count = 0;
327 }
328 } else {
329 cp->symbol_at_put(index, result);
330 }
331 break;
332 }
333 case 19:
334 case 20: {
335 // Record that an error occurred in these two cases but keep parsing so
336 // that ACC_Module can be checked for in the access_flags. Need to
337 // throw NoClassDefFoundError in that case.
338 if (_major_version >= JAVA_9_VERSION) {
339 cfs->guarantee_more(3, CHECK);
340 cfs->get_u2_fast();
341 set_class_bad_constant_seen(tag);
342 break;
343 }
344 }
345 default: {
346 classfile_parse_error("Unknown constant tag %u in class file %s",
347 tag,
348 CHECK);
349 break;
350 }
351 } // end of switch(tag)
352 } // end of for
353
354 // Allocate the remaining symbols
355 if (names_count > 0) {
356 SymbolTable::new_symbols(_loader_data,
357 cp,
358 names_count,
359 names,
360 lengths,
361 indices,
362 hashValues,
363 CHECK);
364 }
365
366 // Copy _current pointer of local copy back to stream.
367 assert(stream->current() == old_current, "non-exclusive use of stream");
368 stream->set_current(cfs1.current());
369
370 }
371
372 static inline bool valid_cp_range(int index, int length) {
373 return (index > 0 && index < length);
374 }
375
376 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
377 assert(cp != NULL, "invariant");
378 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
379 return cp->symbol_at(index);
380 }
381 return NULL;
382 }
383
384 #ifdef ASSERT
385 PRAGMA_DIAG_PUSH
386 PRAGMA_FORMAT_NONLITERAL_IGNORED
387 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
388 ResourceMark rm(THREAD);
389 fatal(msg, _class_name->as_C_string());
390 }
391
392 void ClassFileParser::report_assert_property_failure(const char* msg,
393 int index,
394 TRAPS) const {
395 ResourceMark rm(THREAD);
396 fatal(msg, index, _class_name->as_C_string());
397 }
398 PRAGMA_DIAG_POP
399 #endif
400
401 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
402 ConstantPool* const cp,
403 const int length,
404 TRAPS) {
405 assert(cp != NULL, "invariant");
406 assert(stream != NULL, "invariant");
407
408 // parsing constant pool entries
409 parse_constant_pool_entries(stream, cp, length, CHECK);
410 if (class_bad_constant_seen() != 0) {
411 // a bad CP entry has been detected previously so stop parsing and just return.
412 return;
413 }
414
415 int index = 1; // declared outside of loops for portability
416 int num_klasses = 0;
417
418 // first verification pass - validate cross references
419 // and fixup class and string constants
420 for (index = 1; index < length; index++) { // Index 0 is unused
421 const jbyte tag = cp->tag_at(index).value();
422 switch (tag) {
423 case JVM_CONSTANT_Class: {
424 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
425 break;
426 }
427 case JVM_CONSTANT_Fieldref:
428 // fall through
429 case JVM_CONSTANT_Methodref:
430 // fall through
431 case JVM_CONSTANT_InterfaceMethodref: {
432 if (!_need_verify) break;
433 const int klass_ref_index = cp->klass_ref_index_at(index);
434 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
435 check_property(valid_klass_reference_at(klass_ref_index),
436 "Invalid constant pool index %u in class file %s",
437 klass_ref_index, CHECK);
438 check_property(valid_cp_range(name_and_type_ref_index, length) &&
439 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
440 "Invalid constant pool index %u in class file %s",
441 name_and_type_ref_index, CHECK);
442 break;
443 }
444 case JVM_CONSTANT_String: {
445 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
446 break;
447 }
448 case JVM_CONSTANT_Integer:
449 break;
450 case JVM_CONSTANT_Float:
451 break;
452 case JVM_CONSTANT_Long:
453 case JVM_CONSTANT_Double: {
454 index++;
455 check_property(
456 (index < length && cp->tag_at(index).is_invalid()),
457 "Improper constant pool long/double index %u in class file %s",
458 index, CHECK);
459 break;
460 }
461 case JVM_CONSTANT_NameAndType: {
462 if (!_need_verify) break;
463 const int name_ref_index = cp->name_ref_index_at(index);
464 const int signature_ref_index = cp->signature_ref_index_at(index);
465 check_property(valid_symbol_at(name_ref_index),
466 "Invalid constant pool index %u in class file %s",
467 name_ref_index, CHECK);
468 check_property(valid_symbol_at(signature_ref_index),
469 "Invalid constant pool index %u in class file %s",
470 signature_ref_index, CHECK);
471 break;
472 }
473 case JVM_CONSTANT_Utf8:
474 break;
475 case JVM_CONSTANT_UnresolvedClass: // fall-through
476 case JVM_CONSTANT_UnresolvedClassInError: {
477 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
478 break;
479 }
480 case JVM_CONSTANT_ClassIndex: {
481 const int class_index = cp->klass_index_at(index);
482 check_property(valid_symbol_at(class_index),
483 "Invalid constant pool index %u in class file %s",
484 class_index, CHECK);
485
486 Symbol* const name = cp->symbol_at(class_index);
487 const unsigned int name_len = name->utf8_length();
488
489 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
490 break;
491 }
492 case JVM_CONSTANT_StringIndex: {
493 const int string_index = cp->string_index_at(index);
494 check_property(valid_symbol_at(string_index),
495 "Invalid constant pool index %u in class file %s",
496 string_index, CHECK);
497 Symbol* const sym = cp->symbol_at(string_index);
498 cp->unresolved_string_at_put(index, sym);
499 break;
500 }
501 case JVM_CONSTANT_MethodHandle: {
502 const int ref_index = cp->method_handle_index_at(index);
503 check_property(valid_cp_range(ref_index, length),
504 "Invalid constant pool index %u in class file %s",
505 ref_index, CHECK);
506 const constantTag tag = cp->tag_at(ref_index);
507 const int ref_kind = cp->method_handle_ref_kind_at(index);
508
509 switch (ref_kind) {
510 case JVM_REF_getField:
511 case JVM_REF_getStatic:
512 case JVM_REF_putField:
513 case JVM_REF_putStatic: {
514 check_property(
515 tag.is_field(),
516 "Invalid constant pool index %u in class file %s (not a field)",
517 ref_index, CHECK);
518 break;
519 }
520 case JVM_REF_invokeVirtual:
521 case JVM_REF_newInvokeSpecial: {
522 check_property(
523 tag.is_method(),
524 "Invalid constant pool index %u in class file %s (not a method)",
525 ref_index, CHECK);
526 break;
527 }
528 case JVM_REF_invokeStatic:
529 case JVM_REF_invokeSpecial: {
530 check_property(
531 tag.is_method() ||
532 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
533 "Invalid constant pool index %u in class file %s (not a method)",
534 ref_index, CHECK);
535 break;
536 }
537 case JVM_REF_invokeInterface: {
538 check_property(
539 tag.is_interface_method(),
540 "Invalid constant pool index %u in class file %s (not an interface method)",
541 ref_index, CHECK);
542 break;
543 }
544 default: {
545 classfile_parse_error(
546 "Bad method handle kind at constant pool index %u in class file %s",
547 index, CHECK);
548 }
549 } // switch(refkind)
550 // Keep the ref_index unchanged. It will be indirected at link-time.
551 break;
552 } // case MethodHandle
553 case JVM_CONSTANT_MethodType: {
554 const int ref_index = cp->method_type_index_at(index);
555 check_property(valid_symbol_at(ref_index),
556 "Invalid constant pool index %u in class file %s",
557 ref_index, CHECK);
558 break;
559 }
560 case JVM_CONSTANT_Dynamic: {
561 const int name_and_type_ref_index =
562 cp->invoke_dynamic_name_and_type_ref_index_at(index);
563
564 check_property(valid_cp_range(name_and_type_ref_index, length) &&
565 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
566 "Invalid constant pool index %u in class file %s",
567 name_and_type_ref_index, CHECK);
568 // bootstrap specifier index must be checked later,
569 // when BootstrapMethods attr is available
570
571 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
572 cp->set_has_dynamic_constant();
573 break;
574 }
575 case JVM_CONSTANT_InvokeDynamic: {
576 const int name_and_type_ref_index =
577 cp->invoke_dynamic_name_and_type_ref_index_at(index);
578
579 check_property(valid_cp_range(name_and_type_ref_index, length) &&
580 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
581 "Invalid constant pool index %u in class file %s",
582 name_and_type_ref_index, CHECK);
583 // bootstrap specifier index must be checked later,
584 // when BootstrapMethods attr is available
585 break;
586 }
587 default: {
588 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
589 ShouldNotReachHere();
590 break;
591 }
592 } // switch(tag)
593 } // end of for
594
595 _first_patched_klass_resolved_index = num_klasses;
596 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
597
598 if (_cp_patches != NULL) {
599 // need to treat this_class specially...
600
601 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
602 // for now. These will be replaced with actual names of the patched classes in patch_class().
603 Symbol* s = vmSymbols::star_name();
604 for (int n=_orig_cp_size; n<cp->length(); n++) {
605 cp->symbol_at_put(n, s);
606 }
607
608 int this_class_index;
609 {
610 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
611 const u1* const mark = stream->current();
612 stream->skip_u2_fast(1); // skip flags
613 this_class_index = stream->get_u2_fast();
614 stream->set_current(mark); // revert to mark
615 }
616
617 for (index = 1; index < length; index++) { // Index 0 is unused
618 if (has_cp_patch_at(index)) {
619 guarantee_property(index != this_class_index,
620 "Illegal constant pool patch to self at %d in class file %s",
621 index, CHECK);
622 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
623 }
624 }
625 }
626
627 if (!_need_verify) {
628 return;
629 }
630
631 // second verification pass - checks the strings are of the right format.
632 // but not yet to the other entries
633 for (index = 1; index < length; index++) {
634 const jbyte tag = cp->tag_at(index).value();
635 switch (tag) {
636 case JVM_CONSTANT_UnresolvedClass: {
637 const Symbol* const class_name = cp->klass_name_at(index);
638 // check the name, even if _cp_patches will overwrite it
639 verify_legal_class_name(class_name, CHECK);
640 break;
641 }
642 case JVM_CONSTANT_NameAndType: {
643 if (_need_verify) {
644 const int sig_index = cp->signature_ref_index_at(index);
645 const int name_index = cp->name_ref_index_at(index);
646 const Symbol* const name = cp->symbol_at(name_index);
647 const Symbol* const sig = cp->symbol_at(sig_index);
648 guarantee_property(sig->utf8_length() != 0,
649 "Illegal zero length constant pool entry at %d in class %s",
650 sig_index, CHECK);
651 guarantee_property(name->utf8_length() != 0,
652 "Illegal zero length constant pool entry at %d in class %s",
653 name_index, CHECK);
654
655 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
656 // Format check method name and signature
657 verify_legal_method_name(name, CHECK);
658 verify_legal_method_signature(name, sig, CHECK);
659 } else {
660 // Format check field name and signature
661 verify_legal_field_name(name, CHECK);
662 verify_legal_field_signature(name, sig, CHECK);
663 }
664 }
665 break;
666 }
667 case JVM_CONSTANT_Dynamic: {
668 const int name_and_type_ref_index =
669 cp->name_and_type_ref_index_at(index);
670 // already verified to be utf8
671 const int name_ref_index =
672 cp->name_ref_index_at(name_and_type_ref_index);
673 // already verified to be utf8
674 const int signature_ref_index =
675 cp->signature_ref_index_at(name_and_type_ref_index);
676 const Symbol* const name = cp->symbol_at(name_ref_index);
677 const Symbol* const signature = cp->symbol_at(signature_ref_index);
678 if (_need_verify) {
679 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
680 // Need only to be sure signature is non-zero length and the right type.
681 if (signature->utf8_length() == 0 ||
682 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
683 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
684 }
685 }
686 break;
687 }
688 case JVM_CONSTANT_InvokeDynamic:
689 case JVM_CONSTANT_Fieldref:
690 case JVM_CONSTANT_Methodref:
691 case JVM_CONSTANT_InterfaceMethodref: {
692 const int name_and_type_ref_index =
693 cp->name_and_type_ref_index_at(index);
694 // already verified to be utf8
695 const int name_ref_index =
696 cp->name_ref_index_at(name_and_type_ref_index);
697 // already verified to be utf8
698 const int signature_ref_index =
699 cp->signature_ref_index_at(name_and_type_ref_index);
700 const Symbol* const name = cp->symbol_at(name_ref_index);
701 const Symbol* const signature = cp->symbol_at(signature_ref_index);
702 if (tag == JVM_CONSTANT_Fieldref) {
703 if (_need_verify) {
704 // Field name and signature are verified above, when iterating NameAndType_info.
705 // Need only to be sure signature is non-zero length and the right type.
706 if (signature->utf8_length() == 0 ||
707 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
708 throwIllegalSignature("Field", name, signature, CHECK);
709 }
710 }
711 } else {
712 if (_need_verify) {
713 // Method name and signature are verified above, when iterating NameAndType_info.
714 // Need only to be sure signature is non-zero length and the right type.
715 if (signature->utf8_length() == 0 ||
716 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
717 throwIllegalSignature("Method", name, signature, CHECK);
718 }
719 }
720 // 4509014: If a class method name begins with '<', it must be "<init>"
721 const unsigned int name_len = name->utf8_length();
722 if (tag == JVM_CONSTANT_Methodref &&
723 name_len != 0 &&
724 name->byte_at(0) == '<' &&
725 name != vmSymbols::object_initializer_name()) {
726 classfile_parse_error(
727 "Bad method name at constant pool index %u in class file %s",
728 name_ref_index, CHECK);
729 }
730 }
731 break;
732 }
733 case JVM_CONSTANT_MethodHandle: {
734 const int ref_index = cp->method_handle_index_at(index);
735 const int ref_kind = cp->method_handle_ref_kind_at(index);
736 switch (ref_kind) {
737 case JVM_REF_invokeVirtual:
738 case JVM_REF_invokeStatic:
739 case JVM_REF_invokeSpecial:
740 case JVM_REF_newInvokeSpecial: {
741 const int name_and_type_ref_index =
742 cp->name_and_type_ref_index_at(ref_index);
743 const int name_ref_index =
744 cp->name_ref_index_at(name_and_type_ref_index);
745 const Symbol* const name = cp->symbol_at(name_ref_index);
746 if (ref_kind == JVM_REF_newInvokeSpecial) {
747 if (name != vmSymbols::object_initializer_name()) {
748 classfile_parse_error(
749 "Bad constructor name at constant pool index %u in class file %s",
750 name_ref_index, CHECK);
751 }
752 } else {
753 if (name == vmSymbols::object_initializer_name()) {
754 classfile_parse_error(
755 "Bad method name at constant pool index %u in class file %s",
756 name_ref_index, CHECK);
757 }
758 }
759 break;
760 }
761 // Other ref_kinds are already fully checked in previous pass.
762 } // switch(ref_kind)
763 break;
764 }
765 case JVM_CONSTANT_MethodType: {
766 const Symbol* const no_name = vmSymbols::type_name(); // place holder
767 const Symbol* const signature = cp->method_type_signature_at(index);
768 verify_legal_method_signature(no_name, signature, CHECK);
769 break;
770 }
771 case JVM_CONSTANT_Utf8: {
772 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
773 }
774 } // switch(tag)
775 } // end of for
776 }
777
778 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
779 int name_index = _orig_cp_size + _num_patched_klasses;
780 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
781
782 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
783 _num_patched_klasses ++;
784 }
785
786 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
787 int index,
788 Handle patch,
789 TRAPS) {
790 assert(cp != NULL, "invariant");
791
792 BasicType patch_type = T_VOID;
793
794 switch (cp->tag_at(index).value()) {
795
796 case JVM_CONSTANT_UnresolvedClass: {
797 // Patching a class means pre-resolving it.
798 // The name in the constant pool is ignored.
799 if (java_lang_Class::is_instance(patch())) {
800 guarantee_property(!java_lang_Class::is_primitive(patch()),
801 "Illegal class patch at %d in class file %s",
802 index, CHECK);
803 Klass* k = java_lang_Class::as_Klass(patch());
804 patch_class(cp, index, k, k->name());
805 } else {
806 guarantee_property(java_lang_String::is_instance(patch()),
807 "Illegal class patch at %d in class file %s",
808 index, CHECK);
809 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
810 patch_class(cp, index, NULL, name);
811 }
812 break;
813 }
814
815 case JVM_CONSTANT_String: {
816 // skip this patch and don't clear it. Needs the oop array for resolved
817 // references to be created first.
818 return;
819 }
820 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
821 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
822 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
823 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
824 patch_prim:
825 {
826 jvalue value;
827 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
828 guarantee_property(value_type == patch_type,
829 "Illegal primitive patch at %d in class file %s",
830 index, CHECK);
831 switch (value_type) {
832 case T_INT: cp->int_at_put(index, value.i); break;
833 case T_FLOAT: cp->float_at_put(index, value.f); break;
834 case T_LONG: cp->long_at_put(index, value.j); break;
835 case T_DOUBLE: cp->double_at_put(index, value.d); break;
836 default: assert(false, "");
837 }
838 } // end patch_prim label
839 break;
840
841 default: {
842 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
843 guarantee_property(!has_cp_patch_at(index),
844 "Illegal unexpected patch at %d in class file %s",
845 index, CHECK);
846 return;
847 }
848 } // end of switch(tag)
849
850 // On fall-through, mark the patch as used.
851 clear_cp_patch_at(index);
852 }
853 class NameSigHash: public ResourceObj {
854 public:
855 const Symbol* _name; // name
856 const Symbol* _sig; // signature
857 NameSigHash* _next; // Next entry in hash table
858 };
859
860 static const int HASH_ROW_SIZE = 256;
861
862 static unsigned int hash(const Symbol* name, const Symbol* sig) {
863 unsigned int raw_hash = 0;
864 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
865 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
866
867 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
868 }
869
870
871 static void initialize_hashtable(NameSigHash** table) {
872 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
873 }
874 // Return false if the name/sig combination is found in table.
875 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
876 // The old format checker uses heap sort to find duplicates.
877 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
878 // of table since we don't expect Symbol*'s to move.
879 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
880 assert(name != NULL, "name in constant pool is NULL");
881
882 // First lookup for duplicates
883 int index = hash(name, sig);
884 NameSigHash* entry = table[index];
885 while (entry != NULL) {
886 if (entry->_name == name && entry->_sig == sig) {
887 return false;
888 }
889 entry = entry->_next;
890 }
891
892 // No duplicate is found, allocate a new entry and fill it.
893 entry = new NameSigHash();
894 entry->_name = name;
895 entry->_sig = sig;
896
897 // Insert into hash table
898 entry->_next = table[index];
899 table[index] = entry;
900
901 return true;
902 }
903
904 // Side-effects: populates the _local_interfaces field
905 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
906 const int itfs_len,
907 ConstantPool* const cp,
908 bool* const has_nonstatic_concrete_methods,
909 TRAPS) {
910 assert(stream != NULL, "invariant");
911 assert(cp != NULL, "invariant");
912 assert(has_nonstatic_concrete_methods != NULL, "invariant");
913
914 if (itfs_len == 0) {
915 _local_interfaces = Universe::the_empty_klass_array();
916 } else {
917 assert(itfs_len > 0, "only called for len>0");
918 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
919
920 int index;
921 for (index = 0; index < itfs_len; index++) {
922 const u2 interface_index = stream->get_u2(CHECK);
923 Klass* interf;
924 check_property(
925 valid_klass_reference_at(interface_index),
926 "Interface name has bad constant pool index %u in class file %s",
927 interface_index, CHECK);
928 if (cp->tag_at(interface_index).is_klass()) {
929 interf = cp->resolved_klass_at(interface_index);
930 } else {
931 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
932
933 // Don't need to check legal name because it's checked when parsing constant pool.
934 // But need to make sure it's not an array type.
935 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
936 "Bad interface name in class file %s", CHECK);
937
938 // Call resolve_super so classcircularity is checked
939 interf = SystemDictionary::resolve_super_or_fail(
940 _class_name,
941 unresolved_klass,
942 Handle(THREAD, _loader_data->class_loader()),
943 _protection_domain,
944 false,
945 CHECK);
946 }
947
948 if (!interf->is_interface()) {
949 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
950 "Implementing class");
951 }
952
953 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
954 *has_nonstatic_concrete_methods = true;
955 }
956 _local_interfaces->at_put(index, interf);
957 }
958
959 if (!_need_verify || itfs_len <= 1) {
960 return;
961 }
962
963 // Check if there's any duplicates in interfaces
964 ResourceMark rm(THREAD);
965 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
966 NameSigHash*,
967 HASH_ROW_SIZE);
968 initialize_hashtable(interface_names);
969 bool dup = false;
970 const Symbol* name = NULL;
971 {
972 debug_only(NoSafepointVerifier nsv;)
973 for (index = 0; index < itfs_len; index++) {
974 const Klass* const k = _local_interfaces->at(index);
975 name = InstanceKlass::cast(k)->name();
976 // If no duplicates, add (name, NULL) in hashtable interface_names.
977 if (!put_after_lookup(name, NULL, interface_names)) {
978 dup = true;
979 break;
980 }
981 }
982 }
983 if (dup) {
984 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
985 name->as_C_string(), CHECK);
986 }
987 }
988 }
989
990 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
991 int constantvalue_index,
992 int signature_index,
993 TRAPS) const {
994 // Make sure the constant pool entry is of a type appropriate to this field
995 guarantee_property(
996 (constantvalue_index > 0 &&
997 constantvalue_index < cp->length()),
998 "Bad initial value index %u in ConstantValue attribute in class file %s",
999 constantvalue_index, CHECK);
1000
1001 const constantTag value_type = cp->tag_at(constantvalue_index);
1002 switch(cp->basic_type_for_signature_at(signature_index)) {
1003 case T_LONG: {
1004 guarantee_property(value_type.is_long(),
1005 "Inconsistent constant value type in class file %s",
1006 CHECK);
1007 break;
1008 }
1009 case T_FLOAT: {
1010 guarantee_property(value_type.is_float(),
1011 "Inconsistent constant value type in class file %s",
1012 CHECK);
1013 break;
1014 }
1015 case T_DOUBLE: {
1016 guarantee_property(value_type.is_double(),
1017 "Inconsistent constant value type in class file %s",
1018 CHECK);
1019 break;
1020 }
1021 case T_BYTE:
1022 case T_CHAR:
1023 case T_SHORT:
1024 case T_BOOLEAN:
1025 case T_INT: {
1026 guarantee_property(value_type.is_int(),
1027 "Inconsistent constant value type in class file %s",
1028 CHECK);
1029 break;
1030 }
1031 case T_OBJECT: {
1032 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1033 && value_type.is_string()),
1034 "Bad string initial value in class file %s",
1035 CHECK);
1036 break;
1037 }
1038 default: {
1039 classfile_parse_error("Unable to set initial value %u in class file %s",
1040 constantvalue_index,
1041 CHECK);
1042 }
1043 }
1044 }
1045
1046 class AnnotationCollector : public ResourceObj{
1047 public:
1048 enum Location { _in_field, _in_method, _in_class };
1049 enum ID {
1050 _unknown = 0,
1051 _method_CallerSensitive,
1052 _method_ForceInline,
1053 _method_DontInline,
1054 _method_InjectedProfile,
1055 _method_LambdaForm_Compiled,
1056 _method_LambdaForm_Hidden,
1057 _method_HotSpotIntrinsicCandidate,
1058 _jdk_internal_vm_annotation_Contended,
1059 _field_Stable,
1060 _jdk_internal_vm_annotation_ReservedStackAccess,
1061 _annotation_LIMIT
1062 };
1063 const Location _location;
1064 int _annotations_present;
1065 u2 _contended_group;
1066
1067 AnnotationCollector(Location location)
1068 : _location(location), _annotations_present(0)
1069 {
1070 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1071 }
1072 // If this annotation name has an ID, report it (or _none).
1073 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1074 // Set the annotation name:
1075 void set_annotation(ID id) {
1076 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1077 _annotations_present |= nth_bit((int)id);
1078 }
1079
1080 void remove_annotation(ID id) {
1081 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1082 _annotations_present &= ~nth_bit((int)id);
1083 }
1084
1085 // Report if the annotation is present.
1086 bool has_any_annotations() const { return _annotations_present != 0; }
1087 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1088
1089 void set_contended_group(u2 group) { _contended_group = group; }
1090 u2 contended_group() const { return _contended_group; }
1091
1092 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1093
1094 void set_stable(bool stable) { set_annotation(_field_Stable); }
1095 bool is_stable() const { return has_annotation(_field_Stable); }
1096 };
1097
1098 // This class also doubles as a holder for metadata cleanup.
1099 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1100 private:
1101 ClassLoaderData* _loader_data;
1102 AnnotationArray* _field_annotations;
1103 AnnotationArray* _field_type_annotations;
1104 public:
1105 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1106 AnnotationCollector(_in_field),
1107 _loader_data(loader_data),
1108 _field_annotations(NULL),
1109 _field_type_annotations(NULL) {}
1110 ~FieldAnnotationCollector();
1111 void apply_to(FieldInfo* f);
1112 AnnotationArray* field_annotations() { return _field_annotations; }
1113 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1114
1115 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1116 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1117 };
1118
1119 class MethodAnnotationCollector : public AnnotationCollector{
1120 public:
1121 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1122 void apply_to(const methodHandle& m);
1123 };
1124
1125 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1126 public:
1127 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1128 void apply_to(InstanceKlass* ik);
1129 };
1130
1131
1132 static int skip_annotation_value(const u1*, int, int); // fwd decl
1133
1134 // Safely increment index by val if does not pass limit
1135 #define SAFE_ADD(index, limit, val) \
1136 if (index >= limit - val) return limit; \
1137 index += val;
1138
1139 // Skip an annotation. Return >=limit if there is any problem.
1140 static int skip_annotation(const u1* buffer, int limit, int index) {
1141 assert(buffer != NULL, "invariant");
1142 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1143 // value := switch (tag:u1) { ... }
1144 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1145 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1146 while (--nmem >= 0 && index < limit) {
1147 SAFE_ADD(index, limit, 2); // skip member
1148 index = skip_annotation_value(buffer, limit, index);
1149 }
1150 return index;
1151 }
1152
1153 // Skip an annotation value. Return >=limit if there is any problem.
1154 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1155 assert(buffer != NULL, "invariant");
1156
1157 // value := switch (tag:u1) {
1158 // case B, C, I, S, Z, D, F, J, c: con:u2;
1159 // case e: e_class:u2 e_name:u2;
1160 // case s: s_con:u2;
1161 // case [: do(nval:u2) {value};
1162 // case @: annotation;
1163 // case s: s_con:u2;
1164 // }
1165 SAFE_ADD(index, limit, 1); // read tag
1166 const u1 tag = buffer[index - 1];
1167 switch (tag) {
1168 case 'B':
1169 case 'C':
1170 case 'I':
1171 case 'S':
1172 case 'Z':
1173 case 'D':
1174 case 'F':
1175 case 'J':
1176 case 'c':
1177 case 's':
1178 SAFE_ADD(index, limit, 2); // skip con or s_con
1179 break;
1180 case 'e':
1181 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1182 break;
1183 case '[':
1184 {
1185 SAFE_ADD(index, limit, 2); // read nval
1186 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1187 while (--nval >= 0 && index < limit) {
1188 index = skip_annotation_value(buffer, limit, index);
1189 }
1190 }
1191 break;
1192 case '@':
1193 index = skip_annotation(buffer, limit, index);
1194 break;
1195 default:
1196 return limit; // bad tag byte
1197 }
1198 return index;
1199 }
1200
1201 // Sift through annotations, looking for those significant to the VM:
1202 static void parse_annotations(const ConstantPool* const cp,
1203 const u1* buffer, int limit,
1204 AnnotationCollector* coll,
1205 ClassLoaderData* loader_data,
1206 TRAPS) {
1207
1208 assert(cp != NULL, "invariant");
1209 assert(buffer != NULL, "invariant");
1210 assert(coll != NULL, "invariant");
1211 assert(loader_data != NULL, "invariant");
1212
1213 // annotations := do(nann:u2) {annotation}
1214 int index = 2; // read nann
1215 if (index >= limit) return;
1216 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1217 enum { // initial annotation layout
1218 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1219 count_off = 2, // u2 such as 1 (one value)
1220 member_off = 4, // utf8 such as 'value'
1221 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1222 e_tag_val = 'e',
1223 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1224 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1225 e_size = 11, // end of 'e' annotation
1226 c_tag_val = 'c', // payload is type
1227 c_con_off = 7, // utf8 payload, such as 'I'
1228 c_size = 9, // end of 'c' annotation
1229 s_tag_val = 's', // payload is String
1230 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1231 s_size = 9,
1232 min_size = 6 // smallest possible size (zero members)
1233 };
1234 // Cannot add min_size to index in case of overflow MAX_INT
1235 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1236 int index0 = index;
1237 index = skip_annotation(buffer, limit, index);
1238 const u1* const abase = buffer + index0;
1239 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1240 const int count = Bytes::get_Java_u2((address)abase + count_off);
1241 const Symbol* const aname = check_symbol_at(cp, atype);
1242 if (aname == NULL) break; // invalid annotation name
1243 const Symbol* member = NULL;
1244 if (count >= 1) {
1245 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1246 member = check_symbol_at(cp, member_index);
1247 if (member == NULL) break; // invalid member name
1248 }
1249
1250 // Here is where parsing particular annotations will take place.
1251 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1252 if (AnnotationCollector::_unknown == id) continue;
1253 coll->set_annotation(id);
1254
1255 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1256 // @Contended can optionally specify the contention group.
1257 //
1258 // Contended group defines the equivalence class over the fields:
1259 // the fields within the same contended group are not treated distinct.
1260 // The only exception is default group, which does not incur the
1261 // equivalence. Naturally, contention group for classes is meaningless.
1262 //
1263 // While the contention group is specified as String, annotation
1264 // values are already interned, and we might as well use the constant
1265 // pool index as the group tag.
1266 //
1267 u2 group_index = 0; // default contended group
1268 if (count == 1
1269 && s_size == (index - index0) // match size
1270 && s_tag_val == *(abase + tag_off)
1271 && member == vmSymbols::value_name()) {
1272 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1273 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1274 group_index = 0; // default contended group
1275 }
1276 }
1277 coll->set_contended_group(group_index);
1278 }
1279 }
1280 }
1281
1282
1283 // Parse attributes for a field.
1284 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1285 u2 attributes_count,
1286 bool is_static, u2 signature_index,
1287 u2* const constantvalue_index_addr,
1288 bool* const is_synthetic_addr,
1289 u2* const generic_signature_index_addr,
1290 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1291 TRAPS) {
1292 assert(cfs != NULL, "invariant");
1293 assert(constantvalue_index_addr != NULL, "invariant");
1294 assert(is_synthetic_addr != NULL, "invariant");
1295 assert(generic_signature_index_addr != NULL, "invariant");
1296 assert(parsed_annotations != NULL, "invariant");
1297 assert(attributes_count > 0, "attributes_count should be greater than 0");
1298
1299 u2 constantvalue_index = 0;
1300 u2 generic_signature_index = 0;
1301 bool is_synthetic = false;
1302 const u1* runtime_visible_annotations = NULL;
1303 int runtime_visible_annotations_length = 0;
1304 const u1* runtime_invisible_annotations = NULL;
1305 int runtime_invisible_annotations_length = 0;
1306 const u1* runtime_visible_type_annotations = NULL;
1307 int runtime_visible_type_annotations_length = 0;
1308 const u1* runtime_invisible_type_annotations = NULL;
1309 int runtime_invisible_type_annotations_length = 0;
1310 bool runtime_invisible_annotations_exists = false;
1311 bool runtime_invisible_type_annotations_exists = false;
1312 const ConstantPool* const cp = _cp;
1313
1314 while (attributes_count--) {
1315 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1316 const u2 attribute_name_index = cfs->get_u2_fast();
1317 const u4 attribute_length = cfs->get_u4_fast();
1318 check_property(valid_symbol_at(attribute_name_index),
1319 "Invalid field attribute index %u in class file %s",
1320 attribute_name_index,
1321 CHECK);
1322
1323 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1324 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1325 // ignore if non-static
1326 if (constantvalue_index != 0) {
1327 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1328 }
1329 check_property(
1330 attribute_length == 2,
1331 "Invalid ConstantValue field attribute length %u in class file %s",
1332 attribute_length, CHECK);
1333
1334 constantvalue_index = cfs->get_u2(CHECK);
1335 if (_need_verify) {
1336 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1337 }
1338 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1339 if (attribute_length != 0) {
1340 classfile_parse_error(
1341 "Invalid Synthetic field attribute length %u in class file %s",
1342 attribute_length, CHECK);
1343 }
1344 is_synthetic = true;
1345 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1346 if (attribute_length != 0) {
1347 classfile_parse_error(
1348 "Invalid Deprecated field attribute length %u in class file %s",
1349 attribute_length, CHECK);
1350 }
1351 } else if (_major_version >= JAVA_1_5_VERSION) {
1352 if (attribute_name == vmSymbols::tag_signature()) {
1353 if (generic_signature_index != 0) {
1354 classfile_parse_error(
1355 "Multiple Signature attributes for field in class file %s", CHECK);
1356 }
1357 if (attribute_length != 2) {
1358 classfile_parse_error(
1359 "Wrong size %u for field's Signature attribute in class file %s",
1360 attribute_length, CHECK);
1361 }
1362 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1363 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1364 if (runtime_visible_annotations != NULL) {
1365 classfile_parse_error(
1366 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1367 }
1368 runtime_visible_annotations_length = attribute_length;
1369 runtime_visible_annotations = cfs->current();
1370 assert(runtime_visible_annotations != NULL, "null visible annotations");
1371 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1372 parse_annotations(cp,
1373 runtime_visible_annotations,
1374 runtime_visible_annotations_length,
1375 parsed_annotations,
1376 _loader_data,
1377 CHECK);
1378 cfs->skip_u1_fast(runtime_visible_annotations_length);
1379 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1380 if (runtime_invisible_annotations_exists) {
1381 classfile_parse_error(
1382 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1383 }
1384 runtime_invisible_annotations_exists = true;
1385 if (PreserveAllAnnotations) {
1386 runtime_invisible_annotations_length = attribute_length;
1387 runtime_invisible_annotations = cfs->current();
1388 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1389 }
1390 cfs->skip_u1(attribute_length, CHECK);
1391 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1392 if (runtime_visible_type_annotations != NULL) {
1393 classfile_parse_error(
1394 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1395 }
1396 runtime_visible_type_annotations_length = attribute_length;
1397 runtime_visible_type_annotations = cfs->current();
1398 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1399 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1400 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1401 if (runtime_invisible_type_annotations_exists) {
1402 classfile_parse_error(
1403 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1404 } else {
1405 runtime_invisible_type_annotations_exists = true;
1406 }
1407 if (PreserveAllAnnotations) {
1408 runtime_invisible_type_annotations_length = attribute_length;
1409 runtime_invisible_type_annotations = cfs->current();
1410 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1411 }
1412 cfs->skip_u1(attribute_length, CHECK);
1413 } else {
1414 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1415 }
1416 } else {
1417 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1418 }
1419 }
1420
1421 *constantvalue_index_addr = constantvalue_index;
1422 *is_synthetic_addr = is_synthetic;
1423 *generic_signature_index_addr = generic_signature_index;
1424 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1425 runtime_visible_annotations_length,
1426 runtime_invisible_annotations,
1427 runtime_invisible_annotations_length,
1428 CHECK);
1429 parsed_annotations->set_field_annotations(a);
1430 a = assemble_annotations(runtime_visible_type_annotations,
1431 runtime_visible_type_annotations_length,
1432 runtime_invisible_type_annotations,
1433 runtime_invisible_type_annotations_length,
1434 CHECK);
1435 parsed_annotations->set_field_type_annotations(a);
1436 return;
1437 }
1438
1439
1440 // Field allocation types. Used for computing field offsets.
1441
1442 enum FieldAllocationType {
1443 STATIC_OOP, // Oops
1444 STATIC_BYTE, // Boolean, Byte, char
1445 STATIC_SHORT, // shorts
1446 STATIC_WORD, // ints
1447 STATIC_DOUBLE, // aligned long or double
1448 STATIC_FLATTENABLE, // flattenable field
1449 NONSTATIC_OOP,
1450 NONSTATIC_BYTE,
1451 NONSTATIC_SHORT,
1452 NONSTATIC_WORD,
1453 NONSTATIC_DOUBLE,
1454 NONSTATIC_FLATTENABLE,
1455 MAX_FIELD_ALLOCATION_TYPE,
1456 BAD_ALLOCATION_TYPE = -1
1457 };
1458
1459 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1460 BAD_ALLOCATION_TYPE, // 0
1461 BAD_ALLOCATION_TYPE, // 1
1462 BAD_ALLOCATION_TYPE, // 2
1463 BAD_ALLOCATION_TYPE, // 3
1464 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1465 NONSTATIC_SHORT, // T_CHAR = 5,
1466 NONSTATIC_WORD, // T_FLOAT = 6,
1467 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1468 NONSTATIC_BYTE, // T_BYTE = 8,
1469 NONSTATIC_SHORT, // T_SHORT = 9,
1470 NONSTATIC_WORD, // T_INT = 10,
1471 NONSTATIC_DOUBLE, // T_LONG = 11,
1472 NONSTATIC_OOP, // T_OBJECT = 12,
1473 NONSTATIC_OOP, // T_ARRAY = 13,
1474 NONSTATIC_OOP, // T_VALUETYPE = 14,
1475 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1476 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1477 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1478 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1479 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1480 BAD_ALLOCATION_TYPE, // T_VALUETYPEPTR= 20,
1481 BAD_ALLOCATION_TYPE, // T_CONFLICT = 21,
1482 BAD_ALLOCATION_TYPE, // 0
1483 BAD_ALLOCATION_TYPE, // 1
1484 BAD_ALLOCATION_TYPE, // 2
1485 BAD_ALLOCATION_TYPE, // 3
1486 STATIC_BYTE , // T_BOOLEAN = 4,
1487 STATIC_SHORT, // T_CHAR = 5,
1488 STATIC_WORD, // T_FLOAT = 6,
1489 STATIC_DOUBLE, // T_DOUBLE = 7,
1490 STATIC_BYTE, // T_BYTE = 8,
1491 STATIC_SHORT, // T_SHORT = 9,
1492 STATIC_WORD, // T_INT = 10,
1493 STATIC_DOUBLE, // T_LONG = 11,
1494 STATIC_OOP, // T_OBJECT = 12,
1495 STATIC_OOP, // T_ARRAY = 13,
1496 STATIC_OOP, // T_VALUETYPE = 14,
1497 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1498 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1499 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1500 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1501 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1502 BAD_ALLOCATION_TYPE, // T_VALUETYPEPTR= 20,
1503 BAD_ALLOCATION_TYPE, // T_CONFLICT = 21,
1504 };
1505
1506 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type, bool is_flattenable) {
1507 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1508 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1509 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1510 if (is_flattenable) {
1511 result = is_static ? STATIC_FLATTENABLE : NONSTATIC_FLATTENABLE;
1512 }
1513 return result;
1514 }
1515
1516 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1517 public:
1518 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1519
1520 FieldAllocationCount() {
1521 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1522 count[i] = 0;
1523 }
1524 }
1525
1526 FieldAllocationType update(bool is_static, BasicType type, bool is_flattenable) {
1527 FieldAllocationType atype = basic_type_to_atype(is_static, type, is_flattenable);
1528 if (atype != BAD_ALLOCATION_TYPE) {
1529 // Make sure there is no overflow with injected fields.
1530 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1531 count[atype]++;
1532 }
1533 return atype;
1534 }
1535 };
1536
1537 // Side-effects: populates the _fields, _fields_annotations,
1538 // _fields_type_annotations fields
1539 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1540 bool is_interface,
1541 bool is_value_type,
1542 FieldAllocationCount* const fac,
1543 ConstantPool* cp,
1544 const int cp_size,
1545 u2* const java_fields_count_ptr,
1546 TRAPS) {
1547
1548 assert(cfs != NULL, "invariant");
1549 assert(fac != NULL, "invariant");
1550 assert(cp != NULL, "invariant");
1551 assert(java_fields_count_ptr != NULL, "invariant");
1552
1553 assert(NULL == _fields, "invariant");
1554 assert(NULL == _fields_annotations, "invariant");
1555 assert(NULL == _fields_type_annotations, "invariant");
1556
1557 cfs->guarantee_more(2, CHECK); // length
1558 const u2 length = cfs->get_u2_fast();
1559 *java_fields_count_ptr = length;
1560
1561 int num_injected = 0;
1562 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1563 &num_injected);
1564
1565 const int total_fields = length + num_injected + (is_value_type ? 1 : 0);
1566
1567 // The field array starts with tuples of shorts
1568 // [access, name index, sig index, initial value index, byte offset].
1569 // A generic signature slot only exists for field with generic
1570 // signature attribute. And the access flag is set with
1571 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1572 // signature slots are at the end of the field array and after all
1573 // other fields data.
1574 //
1575 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1576 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1577 // ...
1578 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1579 // [generic signature index]
1580 // [generic signature index]
1581 // ...
1582 //
1583 // Allocate a temporary resource array for field data. For each field,
1584 // a slot is reserved in the temporary array for the generic signature
1585 // index. After parsing all fields, the data are copied to a permanent
1586 // array and any unused slots will be discarded.
1587 ResourceMark rm(THREAD);
1588 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1589 u2,
1590 total_fields * (FieldInfo::field_slots + 1));
1591
1592 // The generic signature slots start after all other fields' data.
1593 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1594 int num_generic_signature = 0;
1595 for (int n = 0; n < length; n++) {
1596 // access_flags, name_index, descriptor_index, attributes_count
1597 cfs->guarantee_more(8, CHECK);
1598
1599 jint recognized_modifiers = JVM_RECOGNIZED_FIELD_MODIFIERS;
1600 // JVM_ACC_FLATTENABLE is defined for class file version 55 and later
1601 if (supports_value_types()) {
1602 recognized_modifiers |= JVM_ACC_FLATTENABLE;
1603 }
1604
1605 const jint flags = cfs->get_u2_fast() & recognized_modifiers;
1606 verify_legal_field_modifiers(flags, is_interface, is_value_type, CHECK);
1607 AccessFlags access_flags;
1608 access_flags.set_flags(flags);
1609
1610 const u2 name_index = cfs->get_u2_fast();
1611 check_property(valid_symbol_at(name_index),
1612 "Invalid constant pool index %u for field name in class file %s",
1613 name_index, CHECK);
1614 const Symbol* const name = cp->symbol_at(name_index);
1615 verify_legal_field_name(name, CHECK);
1616
1617 const u2 signature_index = cfs->get_u2_fast();
1618 check_property(valid_symbol_at(signature_index),
1619 "Invalid constant pool index %u for field signature in class file %s",
1620 signature_index, CHECK);
1621 const Symbol* const sig = cp->symbol_at(signature_index);
1622 verify_legal_field_signature(name, sig, CHECK);
1623 if (access_flags.is_flattenable()) {
1624 // Array flattenability cannot be specified. Arrays of value classes are
1625 // are always flattenable. Arrays of other classes are not flattenable.
1626 if (sig->utf8_length() > 1 && sig->byte_at(0) == '[') {
1627 classfile_parse_error(
1628 "Field \"%s\" with signature \"%s\" in class file %s is invalid."
1629 " ACC_FLATTENABLE cannot be specified for an array",
1630 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1631 }
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, access_flags.is_flattenable());
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, false);
1735 field->set_allocation_type(atype);
1736 index++;
1737 }
1738 }
1739
1740 if (is_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, false);
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 bool is_value_type,
2377 const ConstantPool* cp,
2378 AccessFlags* const promoted_flags,
2379 TRAPS) {
2380 assert(cfs != NULL, "invariant");
2381 assert(cp != NULL, "invariant");
2382 assert(promoted_flags != NULL, "invariant");
2383
2384 ResourceMark rm(THREAD);
2385 // Parse fixed parts:
2386 // access_flags, name_index, descriptor_index, attributes_count
2387 cfs->guarantee_more(8, CHECK_NULL);
2388
2389 int flags = cfs->get_u2_fast();
2390 const u2 name_index = cfs->get_u2_fast();
2391 const int cp_size = cp->length();
2392 check_property(
2393 valid_symbol_at(name_index),
2394 "Illegal constant pool index %u for method name in class file %s",
2395 name_index, CHECK_NULL);
2396 const Symbol* const name = cp->symbol_at(name_index);
2397 verify_legal_method_name(name, CHECK_NULL);
2398
2399 const u2 signature_index = cfs->get_u2_fast();
2400 guarantee_property(
2401 valid_symbol_at(signature_index),
2402 "Illegal constant pool index %u for method signature in class file %s",
2403 signature_index, CHECK_NULL);
2404 const Symbol* const signature = cp->symbol_at(signature_index);
2405
2406 if (name == vmSymbols::class_initializer_name()) {
2407 // We ignore the other access flags for a valid class initializer.
2408 // (JVM Spec 2nd ed., chapter 4.6)
2409 if (_major_version < 51) { // backward compatibility
2410 flags = JVM_ACC_STATIC;
2411 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2412 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2413 } else {
2414 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2415 }
2416 } else {
2417 verify_legal_method_modifiers(flags, is_interface, is_value_type, name, CHECK_NULL);
2418 }
2419
2420 if (name == vmSymbols::object_initializer_name()) {
2421 if (is_interface) {
2422 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2423 /* TBD: uncomment when javac stops generating <init>() for value types.
2424 } else if (is_value_type) {
2425 classfile_parse_error("Value Type cannot have a method named <init>, class file %s", CHECK_NULL);
2426 */
2427 }
2428 }
2429
2430 int args_size = -1; // only used when _need_verify is true
2431 if (_need_verify) {
2432 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2433 verify_legal_method_signature(name, signature, CHECK_NULL);
2434 if (args_size > MAX_ARGS_SIZE) {
2435 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2436 }
2437 }
2438
2439 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2440
2441 // Default values for code and exceptions attribute elements
2442 u2 max_stack = 0;
2443 u2 max_locals = 0;
2444 u4 code_length = 0;
2445 const u1* code_start = 0;
2446 u2 exception_table_length = 0;
2447 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2448 Array<int>* exception_handlers = Universe::the_empty_int_array();
2449 u2 checked_exceptions_length = 0;
2450 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2451 CompressedLineNumberWriteStream* linenumber_table = NULL;
2452 int linenumber_table_length = 0;
2453 int total_lvt_length = 0;
2454 u2 lvt_cnt = 0;
2455 u2 lvtt_cnt = 0;
2456 bool lvt_allocated = false;
2457 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2458 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2459 u2* localvariable_table_length = NULL;
2460 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2461 u2* localvariable_type_table_length = NULL;
2462 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2463 int method_parameters_length = -1;
2464 const u1* method_parameters_data = NULL;
2465 bool method_parameters_seen = false;
2466 bool parsed_code_attribute = false;
2467 bool parsed_checked_exceptions_attribute = false;
2468 bool parsed_stackmap_attribute = false;
2469 // stackmap attribute - JDK1.5
2470 const u1* stackmap_data = NULL;
2471 int stackmap_data_length = 0;
2472 u2 generic_signature_index = 0;
2473 MethodAnnotationCollector parsed_annotations;
2474 const u1* runtime_visible_annotations = NULL;
2475 int runtime_visible_annotations_length = 0;
2476 const u1* runtime_invisible_annotations = NULL;
2477 int runtime_invisible_annotations_length = 0;
2478 const u1* runtime_visible_parameter_annotations = NULL;
2479 int runtime_visible_parameter_annotations_length = 0;
2480 const u1* runtime_invisible_parameter_annotations = NULL;
2481 int runtime_invisible_parameter_annotations_length = 0;
2482 const u1* runtime_visible_type_annotations = NULL;
2483 int runtime_visible_type_annotations_length = 0;
2484 const u1* runtime_invisible_type_annotations = NULL;
2485 int runtime_invisible_type_annotations_length = 0;
2486 bool runtime_invisible_annotations_exists = false;
2487 bool runtime_invisible_type_annotations_exists = false;
2488 bool runtime_invisible_parameter_annotations_exists = false;
2489 const u1* annotation_default = NULL;
2490 int annotation_default_length = 0;
2491
2492 // Parse code and exceptions attribute
2493 u2 method_attributes_count = cfs->get_u2_fast();
2494 while (method_attributes_count--) {
2495 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2496 const u2 method_attribute_name_index = cfs->get_u2_fast();
2497 const u4 method_attribute_length = cfs->get_u4_fast();
2498 check_property(
2499 valid_symbol_at(method_attribute_name_index),
2500 "Invalid method attribute name index %u in class file %s",
2501 method_attribute_name_index, CHECK_NULL);
2502
2503 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2504 if (method_attribute_name == vmSymbols::tag_code()) {
2505 // Parse Code attribute
2506 if (_need_verify) {
2507 guarantee_property(
2508 !access_flags.is_native() && !access_flags.is_abstract(),
2509 "Code attribute in native or abstract methods in class file %s",
2510 CHECK_NULL);
2511 }
2512 if (parsed_code_attribute) {
2513 classfile_parse_error("Multiple Code attributes in class file %s",
2514 CHECK_NULL);
2515 }
2516 parsed_code_attribute = true;
2517
2518 // Stack size, locals size, and code size
2519 if (_major_version == 45 && _minor_version <= 2) {
2520 cfs->guarantee_more(4, CHECK_NULL);
2521 max_stack = cfs->get_u1_fast();
2522 max_locals = cfs->get_u1_fast();
2523 code_length = cfs->get_u2_fast();
2524 } else {
2525 cfs->guarantee_more(8, CHECK_NULL);
2526 max_stack = cfs->get_u2_fast();
2527 max_locals = cfs->get_u2_fast();
2528 code_length = cfs->get_u4_fast();
2529 }
2530 if (_need_verify) {
2531 guarantee_property(args_size <= max_locals,
2532 "Arguments can't fit into locals in class file %s",
2533 CHECK_NULL);
2534 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2535 "Invalid method Code length %u in class file %s",
2536 code_length, CHECK_NULL);
2537 }
2538 // Code pointer
2539 code_start = cfs->current();
2540 assert(code_start != NULL, "null code start");
2541 cfs->guarantee_more(code_length, CHECK_NULL);
2542 cfs->skip_u1_fast(code_length);
2543
2544 // Exception handler table
2545 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2546 exception_table_length = cfs->get_u2_fast();
2547 if (exception_table_length > 0) {
2548 exception_table_start = parse_exception_table(cfs,
2549 code_length,
2550 exception_table_length,
2551 CHECK_NULL);
2552 }
2553
2554 // Parse additional attributes in code attribute
2555 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2556 u2 code_attributes_count = cfs->get_u2_fast();
2557
2558 unsigned int calculated_attribute_length = 0;
2559
2560 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2561 calculated_attribute_length =
2562 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2563 } else {
2564 // max_stack, locals and length are smaller in pre-version 45.2 classes
2565 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2566 }
2567 calculated_attribute_length +=
2568 code_length +
2569 sizeof(exception_table_length) +
2570 sizeof(code_attributes_count) +
2571 exception_table_length *
2572 ( sizeof(u2) + // start_pc
2573 sizeof(u2) + // end_pc
2574 sizeof(u2) + // handler_pc
2575 sizeof(u2) ); // catch_type_index
2576
2577 while (code_attributes_count--) {
2578 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2579 const u2 code_attribute_name_index = cfs->get_u2_fast();
2580 const u4 code_attribute_length = cfs->get_u4_fast();
2581 calculated_attribute_length += code_attribute_length +
2582 sizeof(code_attribute_name_index) +
2583 sizeof(code_attribute_length);
2584 check_property(valid_symbol_at(code_attribute_name_index),
2585 "Invalid code attribute name index %u in class file %s",
2586 code_attribute_name_index,
2587 CHECK_NULL);
2588 if (LoadLineNumberTables &&
2589 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2590 // Parse and compress line number table
2591 parse_linenumber_table(code_attribute_length,
2592 code_length,
2593 &linenumber_table,
2594 CHECK_NULL);
2595
2596 } else if (LoadLocalVariableTables &&
2597 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2598 // Parse local variable table
2599 if (!lvt_allocated) {
2600 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2601 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2602 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2603 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2604 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2605 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2606 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2607 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2608 lvt_allocated = true;
2609 }
2610 if (lvt_cnt == max_lvt_cnt) {
2611 max_lvt_cnt <<= 1;
2612 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2613 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2614 }
2615 localvariable_table_start[lvt_cnt] =
2616 parse_localvariable_table(cfs,
2617 code_length,
2618 max_locals,
2619 code_attribute_length,
2620 &localvariable_table_length[lvt_cnt],
2621 false, // is not LVTT
2622 CHECK_NULL);
2623 total_lvt_length += localvariable_table_length[lvt_cnt];
2624 lvt_cnt++;
2625 } else if (LoadLocalVariableTypeTables &&
2626 _major_version >= JAVA_1_5_VERSION &&
2627 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2628 if (!lvt_allocated) {
2629 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2630 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2631 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2632 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2633 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2634 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2635 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2636 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2637 lvt_allocated = true;
2638 }
2639 // Parse local variable type table
2640 if (lvtt_cnt == max_lvtt_cnt) {
2641 max_lvtt_cnt <<= 1;
2642 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2643 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2644 }
2645 localvariable_type_table_start[lvtt_cnt] =
2646 parse_localvariable_table(cfs,
2647 code_length,
2648 max_locals,
2649 code_attribute_length,
2650 &localvariable_type_table_length[lvtt_cnt],
2651 true, // is LVTT
2652 CHECK_NULL);
2653 lvtt_cnt++;
2654 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2655 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2656 // Stack map is only needed by the new verifier in JDK1.5.
2657 if (parsed_stackmap_attribute) {
2658 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2659 }
2660 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2661 stackmap_data_length = code_attribute_length;
2662 parsed_stackmap_attribute = true;
2663 } else {
2664 // Skip unknown attributes
2665 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2666 }
2667 }
2668 // check method attribute length
2669 if (_need_verify) {
2670 guarantee_property(method_attribute_length == calculated_attribute_length,
2671 "Code segment has wrong length in class file %s",
2672 CHECK_NULL);
2673 }
2674 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2675 // Parse Exceptions attribute
2676 if (parsed_checked_exceptions_attribute) {
2677 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2678 CHECK_NULL);
2679 }
2680 parsed_checked_exceptions_attribute = true;
2681 checked_exceptions_start =
2682 parse_checked_exceptions(cfs,
2683 &checked_exceptions_length,
2684 method_attribute_length,
2685 CHECK_NULL);
2686 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2687 // reject multiple method parameters
2688 if (method_parameters_seen) {
2689 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2690 CHECK_NULL);
2691 }
2692 method_parameters_seen = true;
2693 method_parameters_length = cfs->get_u1_fast();
2694 const u2 real_length = (method_parameters_length * 4u) + 1u;
2695 if (method_attribute_length != real_length) {
2696 classfile_parse_error(
2697 "Invalid MethodParameters method attribute length %u in class file",
2698 method_attribute_length, CHECK_NULL);
2699 }
2700 method_parameters_data = cfs->current();
2701 cfs->skip_u2_fast(method_parameters_length);
2702 cfs->skip_u2_fast(method_parameters_length);
2703 // ignore this attribute if it cannot be reflected
2704 if (!SystemDictionary::Parameter_klass_loaded())
2705 method_parameters_length = -1;
2706 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2707 if (method_attribute_length != 0) {
2708 classfile_parse_error(
2709 "Invalid Synthetic method attribute length %u in class file %s",
2710 method_attribute_length, CHECK_NULL);
2711 }
2712 // Should we check that there hasn't already been a synthetic attribute?
2713 access_flags.set_is_synthetic();
2714 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2715 if (method_attribute_length != 0) {
2716 classfile_parse_error(
2717 "Invalid Deprecated method attribute length %u in class file %s",
2718 method_attribute_length, CHECK_NULL);
2719 }
2720 } else if (_major_version >= JAVA_1_5_VERSION) {
2721 if (method_attribute_name == vmSymbols::tag_signature()) {
2722 if (generic_signature_index != 0) {
2723 classfile_parse_error(
2724 "Multiple Signature attributes for method in class file %s",
2725 CHECK_NULL);
2726 }
2727 if (method_attribute_length != 2) {
2728 classfile_parse_error(
2729 "Invalid Signature attribute length %u in class file %s",
2730 method_attribute_length, CHECK_NULL);
2731 }
2732 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2733 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2734 if (runtime_visible_annotations != NULL) {
2735 classfile_parse_error(
2736 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2737 CHECK_NULL);
2738 }
2739 runtime_visible_annotations_length = method_attribute_length;
2740 runtime_visible_annotations = cfs->current();
2741 assert(runtime_visible_annotations != NULL, "null visible annotations");
2742 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2743 parse_annotations(cp,
2744 runtime_visible_annotations,
2745 runtime_visible_annotations_length,
2746 &parsed_annotations,
2747 _loader_data,
2748 CHECK_NULL);
2749 cfs->skip_u1_fast(runtime_visible_annotations_length);
2750 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2751 if (runtime_invisible_annotations_exists) {
2752 classfile_parse_error(
2753 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2754 CHECK_NULL);
2755 }
2756 runtime_invisible_annotations_exists = true;
2757 if (PreserveAllAnnotations) {
2758 runtime_invisible_annotations_length = method_attribute_length;
2759 runtime_invisible_annotations = cfs->current();
2760 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2761 }
2762 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2763 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2764 if (runtime_visible_parameter_annotations != NULL) {
2765 classfile_parse_error(
2766 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2767 CHECK_NULL);
2768 }
2769 runtime_visible_parameter_annotations_length = method_attribute_length;
2770 runtime_visible_parameter_annotations = cfs->current();
2771 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2772 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2773 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2774 if (runtime_invisible_parameter_annotations_exists) {
2775 classfile_parse_error(
2776 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2777 CHECK_NULL);
2778 }
2779 runtime_invisible_parameter_annotations_exists = true;
2780 if (PreserveAllAnnotations) {
2781 runtime_invisible_parameter_annotations_length = method_attribute_length;
2782 runtime_invisible_parameter_annotations = cfs->current();
2783 assert(runtime_invisible_parameter_annotations != NULL,
2784 "null invisible parameter annotations");
2785 }
2786 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2787 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2788 if (annotation_default != NULL) {
2789 classfile_parse_error(
2790 "Multiple AnnotationDefault attributes for method in class file %s",
2791 CHECK_NULL);
2792 }
2793 annotation_default_length = method_attribute_length;
2794 annotation_default = cfs->current();
2795 assert(annotation_default != NULL, "null annotation default");
2796 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2797 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2798 if (runtime_visible_type_annotations != NULL) {
2799 classfile_parse_error(
2800 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2801 CHECK_NULL);
2802 }
2803 runtime_visible_type_annotations_length = method_attribute_length;
2804 runtime_visible_type_annotations = cfs->current();
2805 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2806 // No need for the VM to parse Type annotations
2807 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2808 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2809 if (runtime_invisible_type_annotations_exists) {
2810 classfile_parse_error(
2811 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2812 CHECK_NULL);
2813 } else {
2814 runtime_invisible_type_annotations_exists = true;
2815 }
2816 if (PreserveAllAnnotations) {
2817 runtime_invisible_type_annotations_length = method_attribute_length;
2818 runtime_invisible_type_annotations = cfs->current();
2819 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2820 }
2821 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2822 } else {
2823 // Skip unknown attributes
2824 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2825 }
2826 } else {
2827 // Skip unknown attributes
2828 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2829 }
2830 }
2831
2832 if (linenumber_table != NULL) {
2833 linenumber_table->write_terminator();
2834 linenumber_table_length = linenumber_table->position();
2835 }
2836
2837 // Make sure there's at least one Code attribute in non-native/non-abstract method
2838 if (_need_verify) {
2839 guarantee_property(access_flags.is_native() ||
2840 access_flags.is_abstract() ||
2841 parsed_code_attribute,
2842 "Absent Code attribute in method that is not native or abstract in class file %s",
2843 CHECK_NULL);
2844 }
2845
2846 // All sizing information for a Method* is finally available, now create it
2847 InlineTableSizes sizes(
2848 total_lvt_length,
2849 linenumber_table_length,
2850 exception_table_length,
2851 checked_exceptions_length,
2852 method_parameters_length,
2853 generic_signature_index,
2854 runtime_visible_annotations_length +
2855 runtime_invisible_annotations_length,
2856 runtime_visible_parameter_annotations_length +
2857 runtime_invisible_parameter_annotations_length,
2858 runtime_visible_type_annotations_length +
2859 runtime_invisible_type_annotations_length,
2860 annotation_default_length,
2861 0);
2862
2863 Method* const m = Method::allocate(_loader_data,
2864 code_length,
2865 access_flags,
2866 &sizes,
2867 ConstMethod::NORMAL,
2868 CHECK_NULL);
2869
2870 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2871
2872 // Fill in information from fixed part (access_flags already set)
2873 m->set_constants(_cp);
2874 m->set_name_index(name_index);
2875 m->set_signature_index(signature_index);
2876
2877 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2878 m->constMethod()->set_result_type(rtf.type());
2879
2880 if (args_size >= 0) {
2881 m->set_size_of_parameters(args_size);
2882 } else {
2883 m->compute_size_of_parameters(THREAD);
2884 }
2885 #ifdef ASSERT
2886 if (args_size >= 0) {
2887 m->compute_size_of_parameters(THREAD);
2888 assert(args_size == m->size_of_parameters(), "");
2889 }
2890 #endif
2891
2892 // Fill in code attribute information
2893 m->set_max_stack(max_stack);
2894 m->set_max_locals(max_locals);
2895 if (stackmap_data != NULL) {
2896 m->constMethod()->copy_stackmap_data(_loader_data,
2897 (u1*)stackmap_data,
2898 stackmap_data_length,
2899 CHECK_NULL);
2900 }
2901
2902 // Copy byte codes
2903 m->set_code((u1*)code_start);
2904
2905 // Copy line number table
2906 if (linenumber_table != NULL) {
2907 memcpy(m->compressed_linenumber_table(),
2908 linenumber_table->buffer(),
2909 linenumber_table_length);
2910 }
2911
2912 // Copy exception table
2913 if (exception_table_length > 0) {
2914 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2915 m->exception_table_start(),
2916 exception_table_length * sizeof(ExceptionTableElement),
2917 sizeof(u2));
2918 }
2919
2920 // Copy method parameters
2921 if (method_parameters_length > 0) {
2922 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2923 for (int i = 0; i < method_parameters_length; i++) {
2924 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2925 method_parameters_data += 2;
2926 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2927 method_parameters_data += 2;
2928 }
2929 }
2930
2931 // Copy checked exceptions
2932 if (checked_exceptions_length > 0) {
2933 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2934 m->checked_exceptions_start(),
2935 checked_exceptions_length * sizeof(CheckedExceptionElement),
2936 sizeof(u2));
2937 }
2938
2939 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2940 if (total_lvt_length > 0) {
2941 promoted_flags->set_has_localvariable_table();
2942 copy_localvariable_table(m->constMethod(),
2943 lvt_cnt,
2944 localvariable_table_length,
2945 localvariable_table_start,
2946 lvtt_cnt,
2947 localvariable_type_table_length,
2948 localvariable_type_table_start,
2949 CHECK_NULL);
2950 }
2951
2952 if (parsed_annotations.has_any_annotations())
2953 parsed_annotations.apply_to(m);
2954
2955 // Copy annotations
2956 copy_method_annotations(m->constMethod(),
2957 runtime_visible_annotations,
2958 runtime_visible_annotations_length,
2959 runtime_invisible_annotations,
2960 runtime_invisible_annotations_length,
2961 runtime_visible_parameter_annotations,
2962 runtime_visible_parameter_annotations_length,
2963 runtime_invisible_parameter_annotations,
2964 runtime_invisible_parameter_annotations_length,
2965 runtime_visible_type_annotations,
2966 runtime_visible_type_annotations_length,
2967 runtime_invisible_type_annotations,
2968 runtime_invisible_type_annotations_length,
2969 annotation_default,
2970 annotation_default_length,
2971 CHECK_NULL);
2972
2973 if (name == vmSymbols::finalize_method_name() &&
2974 signature == vmSymbols::void_method_signature()) {
2975 if (m->is_empty_method()) {
2976 _has_empty_finalizer = true;
2977 } else {
2978 _has_finalizer = true;
2979 }
2980 }
2981 if (name == vmSymbols::object_initializer_name() &&
2982 signature == vmSymbols::void_method_signature() &&
2983 m->is_vanilla_constructor()) {
2984 _has_vanilla_constructor = true;
2985 }
2986
2987 NOT_PRODUCT(m->verify());
2988 return m;
2989 }
2990
2991
2992 // The promoted_flags parameter is used to pass relevant access_flags
2993 // from the methods back up to the containing klass. These flag values
2994 // are added to klass's access_flags.
2995 // Side-effects: populates the _methods field in the parser
2996 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2997 bool is_interface,
2998 bool is_value_type,
2999 AccessFlags* promoted_flags,
3000 bool* has_final_method,
3001 bool* declares_nonstatic_concrete_methods,
3002 TRAPS) {
3003 assert(cfs != NULL, "invariant");
3004 assert(promoted_flags != NULL, "invariant");
3005 assert(has_final_method != NULL, "invariant");
3006 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
3007
3008 assert(NULL == _methods, "invariant");
3009
3010 cfs->guarantee_more(2, CHECK); // length
3011 const u2 length = cfs->get_u2_fast();
3012 if (length == 0) {
3013 _methods = Universe::the_empty_method_array();
3014 } else {
3015 _methods = MetadataFactory::new_array<Method*>(_loader_data,
3016 length,
3017 NULL,
3018 CHECK);
3019
3020 for (int index = 0; index < length; index++) {
3021 Method* method = parse_method(cfs,
3022 is_interface,
3023 is_value_type,
3024 _cp,
3025 promoted_flags,
3026 CHECK);
3027
3028 if (method->is_final()) {
3029 *has_final_method = true;
3030 }
3031 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
3032 // used for interface initialization, and default method inheritance analysis
3033 if (is_interface && !(*declares_nonstatic_concrete_methods)
3034 && !method->is_abstract() && !method->is_static()) {
3035 *declares_nonstatic_concrete_methods = true;
3036 }
3037 _methods->at_put(index, method);
3038 }
3039
3040 if (_need_verify && length > 1) {
3041 // Check duplicated methods
3042 ResourceMark rm(THREAD);
3043 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
3044 THREAD, NameSigHash*, HASH_ROW_SIZE);
3045 initialize_hashtable(names_and_sigs);
3046 bool dup = false;
3047 const Symbol* name = NULL;
3048 const Symbol* sig = NULL;
3049 {
3050 debug_only(NoSafepointVerifier nsv;)
3051 for (int i = 0; i < length; i++) {
3052 const Method* const m = _methods->at(i);
3053 name = m->name();
3054 sig = m->signature();
3055 // If no duplicates, add name/signature in hashtable names_and_sigs.
3056 if (!put_after_lookup(name, sig, names_and_sigs)) {
3057 dup = true;
3058 break;
3059 }
3060 }
3061 }
3062 if (dup) {
3063 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
3064 name->as_C_string(), sig->as_klass_external_name(), CHECK);
3065 }
3066 }
3067 }
3068 }
3069
3070 static const intArray* sort_methods(Array<Method*>* methods) {
3071 const int length = methods->length();
3072 // If JVMTI original method ordering or sharing is enabled we have to
3073 // remember the original class file ordering.
3074 // We temporarily use the vtable_index field in the Method* to store the
3075 // class file index, so we can read in after calling qsort.
3076 // Put the method ordering in the shared archive.
3077 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3078 for (int index = 0; index < length; index++) {
3079 Method* const m = methods->at(index);
3080 assert(!m->valid_vtable_index(), "vtable index should not be set");
3081 m->set_vtable_index(index);
3082 }
3083 }
3084 // Sort method array by ascending method name (for faster lookups & vtable construction)
3085 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3086 Method::sort_methods(methods);
3087
3088 intArray* method_ordering = NULL;
3089 // If JVMTI original method ordering or sharing is enabled construct int
3090 // array remembering the original ordering
3091 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3092 method_ordering = new intArray(length, length, -1);
3093 for (int index = 0; index < length; index++) {
3094 Method* const m = methods->at(index);
3095 const int old_index = m->vtable_index();
3096 assert(old_index >= 0 && old_index < length, "invalid method index");
3097 method_ordering->at_put(index, old_index);
3098 m->set_vtable_index(Method::invalid_vtable_index);
3099 }
3100 }
3101 return method_ordering;
3102 }
3103
3104 // Parse generic_signature attribute for methods and fields
3105 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3106 TRAPS) {
3107 assert(cfs != NULL, "invariant");
3108
3109 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3110 const u2 generic_signature_index = cfs->get_u2_fast();
3111 check_property(
3112 valid_symbol_at(generic_signature_index),
3113 "Invalid Signature attribute at constant pool index %u in class file %s",
3114 generic_signature_index, CHECK_0);
3115 return generic_signature_index;
3116 }
3117
3118 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3119 TRAPS) {
3120
3121 assert(cfs != NULL, "invariant");
3122
3123 cfs->guarantee_more(2, CHECK); // sourcefile_index
3124 const u2 sourcefile_index = cfs->get_u2_fast();
3125 check_property(
3126 valid_symbol_at(sourcefile_index),
3127 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3128 sourcefile_index, CHECK);
3129 set_class_sourcefile_index(sourcefile_index);
3130 }
3131
3132 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3133 int length,
3134 TRAPS) {
3135 assert(cfs != NULL, "invariant");
3136
3137 const u1* const sde_buffer = cfs->current();
3138 assert(sde_buffer != NULL, "null sde buffer");
3139
3140 // Don't bother storing it if there is no way to retrieve it
3141 if (JvmtiExport::can_get_source_debug_extension()) {
3142 assert((length+1) > length, "Overflow checking");
3143 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3144 for (int i = 0; i < length; i++) {
3145 sde[i] = sde_buffer[i];
3146 }
3147 sde[length] = '\0';
3148 set_class_sde_buffer((const char*)sde, length);
3149 }
3150 // Got utf8 string, set stream position forward
3151 cfs->skip_u1(length, CHECK);
3152 }
3153
3154
3155 // Inner classes can be static, private or protected (classic VM does this)
3156 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3157 JVM_ACC_PRIVATE | \
3158 JVM_ACC_PROTECTED | \
3159 JVM_ACC_STATIC \
3160 )
3161
3162 u2 ClassFileParser::parse_value_types_attribute(const ClassFileStream* const cfs,
3163 const u1* const value_types_attribute_start,
3164 TRAPS) {
3165 const u1* const current_mark = cfs->current();
3166 u2 length = 0;
3167 if (value_types_attribute_start != NULL) {
3168 cfs->set_current(value_types_attribute_start);
3169 cfs->guarantee_more(2, CHECK_0); // length
3170 length = cfs->get_u2_fast();
3171 }
3172 Array<ValueTypes>* const value_types = MetadataFactory::new_array<ValueTypes>(_loader_data, length, CHECK_0);
3173
3174 int index = 0;
3175 const int cp_size = _cp->length();
3176 cfs->guarantee_more(2 *length, CHECK_0);
3177 for (int n = 0; n < length; n++) {
3178 // Value types class index
3179 const u2 value_types_info_index = cfs->get_u2_fast();
3180 check_property(
3181 valid_klass_reference_at(value_types_info_index),
3182 "value_types_info_index %u has bad constant type in class file %s",
3183 value_types_info_index, CHECK_0);
3184 ValueTypes vt;
3185 vt._class_info_index = value_types_info_index;
3186 vt._class_name = NULL;
3187 value_types->at_put(index++, vt);
3188 }
3189 _value_types = value_types;
3190 // Restore buffer's current position.
3191 cfs->set_current(current_mark);
3192
3193 return length;
3194 }
3195
3196 // Return number of classes in the inner classes attribute table
3197 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3198 const u1* const inner_classes_attribute_start,
3199 bool parsed_enclosingmethod_attribute,
3200 u2 enclosing_method_class_index,
3201 u2 enclosing_method_method_index,
3202 TRAPS) {
3203 const u1* const current_mark = cfs->current();
3204 u2 length = 0;
3205 if (inner_classes_attribute_start != NULL) {
3206 cfs->set_current(inner_classes_attribute_start);
3207 cfs->guarantee_more(2, CHECK_0); // length
3208 length = cfs->get_u2_fast();
3209 }
3210
3211 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3212 // method data:
3213 // [inner_class_info_index,
3214 // outer_class_info_index,
3215 // inner_name_index,
3216 // inner_class_access_flags,
3217 // ...
3218 // enclosing_method_class_index,
3219 // enclosing_method_method_index]
3220 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3221 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3222 _inner_classes = inner_classes;
3223
3224 int index = 0;
3225 const int cp_size = _cp->length();
3226 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3227 for (int n = 0; n < length; n++) {
3228 // Inner class index
3229 const u2 inner_class_info_index = cfs->get_u2_fast();
3230 check_property(
3231 valid_klass_reference_at(inner_class_info_index),
3232 "inner_class_info_index %u has bad constant type in class file %s",
3233 inner_class_info_index, CHECK_0);
3234 // Outer class index
3235 const u2 outer_class_info_index = cfs->get_u2_fast();
3236 check_property(
3237 outer_class_info_index == 0 ||
3238 valid_klass_reference_at(outer_class_info_index),
3239 "outer_class_info_index %u has bad constant type in class file %s",
3240 outer_class_info_index, CHECK_0);
3241 // Inner class name
3242 const u2 inner_name_index = cfs->get_u2_fast();
3243 check_property(
3244 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3245 "inner_name_index %u has bad constant type in class file %s",
3246 inner_name_index, CHECK_0);
3247 if (_need_verify) {
3248 guarantee_property(inner_class_info_index != outer_class_info_index,
3249 "Class is both outer and inner class in class file %s", CHECK_0);
3250 }
3251
3252 jint recognized_modifiers = RECOGNIZED_INNER_CLASS_MODIFIERS;
3253 // JVM_ACC_MODULE is defined in JDK-9 and later.
3254 if (_major_version >= JAVA_9_VERSION) {
3255 recognized_modifiers |= JVM_ACC_MODULE;
3256 }
3257 // JVM_ACC_VALUE is defined for class file version 55 and later
3258 if (supports_value_types()) {
3259 recognized_modifiers |= JVM_ACC_VALUE;
3260 }
3261
3262 // Access flags
3263 jint flags = cfs->get_u2_fast() & recognized_modifiers;
3264
3265 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3266 // Set abstract bit for old class files for backward compatibility
3267 flags |= JVM_ACC_ABSTRACT;
3268 }
3269 verify_legal_class_modifiers(flags, CHECK_0);
3270 AccessFlags inner_access_flags(flags);
3271
3272 inner_classes->at_put(index++, inner_class_info_index);
3273 inner_classes->at_put(index++, outer_class_info_index);
3274 inner_classes->at_put(index++, inner_name_index);
3275 inner_classes->at_put(index++, inner_access_flags.as_short());
3276 }
3277
3278 // 4347400: make sure there's no duplicate entry in the classes array
3279 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3280 for(int i = 0; i < length * 4; i += 4) {
3281 for(int j = i + 4; j < length * 4; j += 4) {
3282 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3283 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3284 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3285 inner_classes->at(i+3) != inner_classes->at(j+3)),
3286 "Duplicate entry in InnerClasses in class file %s",
3287 CHECK_0);
3288 }
3289 }
3290 }
3291
3292 // Set EnclosingMethod class and method indexes.
3293 if (parsed_enclosingmethod_attribute) {
3294 inner_classes->at_put(index++, enclosing_method_class_index);
3295 inner_classes->at_put(index++, enclosing_method_method_index);
3296 }
3297 assert(index == size, "wrong size");
3298
3299 // Restore buffer's current position.
3300 cfs->set_current(current_mark);
3301
3302 return length;
3303 }
3304
3305 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3306 set_class_synthetic_flag(true);
3307 }
3308
3309 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3310 assert(cfs != NULL, "invariant");
3311
3312 const u2 signature_index = cfs->get_u2(CHECK);
3313 check_property(
3314 valid_symbol_at(signature_index),
3315 "Invalid constant pool index %u in Signature attribute in class file %s",
3316 signature_index, CHECK);
3317 set_class_generic_signature_index(signature_index);
3318 }
3319
3320 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3321 ConstantPool* cp,
3322 u4 attribute_byte_length,
3323 TRAPS) {
3324 assert(cfs != NULL, "invariant");
3325 assert(cp != NULL, "invariant");
3326
3327 const u1* const current_start = cfs->current();
3328
3329 guarantee_property(attribute_byte_length >= sizeof(u2),
3330 "Invalid BootstrapMethods attribute length %u in class file %s",
3331 attribute_byte_length,
3332 CHECK);
3333
3334 cfs->guarantee_more(attribute_byte_length, CHECK);
3335
3336 const int attribute_array_length = cfs->get_u2_fast();
3337
3338 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3339 "Short length on BootstrapMethods in class file %s",
3340 CHECK);
3341
3342
3343 // The attribute contains a counted array of counted tuples of shorts,
3344 // represending bootstrap specifiers:
3345 // length*{bootstrap_method_index, argument_count*{argument_index}}
3346 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3347 // operand_count = number of shorts in attr, except for leading length
3348
3349 // The attribute is copied into a short[] array.
3350 // The array begins with a series of short[2] pairs, one for each tuple.
3351 const int index_size = (attribute_array_length * 2);
3352
3353 Array<u2>* const operands =
3354 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3355
3356 // Eagerly assign operands so they will be deallocated with the constant
3357 // pool if there is an error.
3358 cp->set_operands(operands);
3359
3360 int operand_fill_index = index_size;
3361 const int cp_size = cp->length();
3362
3363 for (int n = 0; n < attribute_array_length; n++) {
3364 // Store a 32-bit offset into the header of the operand array.
3365 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3366
3367 // Read a bootstrap specifier.
3368 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3369 const u2 bootstrap_method_index = cfs->get_u2_fast();
3370 const u2 argument_count = cfs->get_u2_fast();
3371 check_property(
3372 valid_cp_range(bootstrap_method_index, cp_size) &&
3373 cp->tag_at(bootstrap_method_index).is_method_handle(),
3374 "bootstrap_method_index %u has bad constant type in class file %s",
3375 bootstrap_method_index,
3376 CHECK);
3377
3378 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3379 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3380 CHECK);
3381
3382 operands->at_put(operand_fill_index++, bootstrap_method_index);
3383 operands->at_put(operand_fill_index++, argument_count);
3384
3385 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3386 for (int j = 0; j < argument_count; j++) {
3387 const u2 argument_index = cfs->get_u2_fast();
3388 check_property(
3389 valid_cp_range(argument_index, cp_size) &&
3390 cp->tag_at(argument_index).is_loadable_constant(),
3391 "argument_index %u has bad constant type in class file %s",
3392 argument_index,
3393 CHECK);
3394 operands->at_put(operand_fill_index++, argument_index);
3395 }
3396 }
3397 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3398 "Bad length on BootstrapMethods in class file %s",
3399 CHECK);
3400 }
3401
3402 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3403 ConstantPool* cp,
3404 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3405 TRAPS) {
3406 assert(cfs != NULL, "invariant");
3407 assert(cp != NULL, "invariant");
3408 assert(parsed_annotations != NULL, "invariant");
3409
3410 // Set inner classes attribute to default sentinel
3411 _inner_classes = Universe::the_empty_short_array();
3412 cfs->guarantee_more(2, CHECK); // attributes_count
3413 u2 attributes_count = cfs->get_u2_fast();
3414 bool parsed_sourcefile_attribute = false;
3415 bool parsed_innerclasses_attribute = false;
3416 bool parsed_value_types_attribute = false;
3417 bool parsed_enclosingmethod_attribute = false;
3418 bool parsed_bootstrap_methods_attribute = false;
3419 const u1* runtime_visible_annotations = NULL;
3420 int runtime_visible_annotations_length = 0;
3421 const u1* runtime_invisible_annotations = NULL;
3422 int runtime_invisible_annotations_length = 0;
3423 const u1* runtime_visible_type_annotations = NULL;
3424 int runtime_visible_type_annotations_length = 0;
3425 const u1* runtime_invisible_type_annotations = NULL;
3426 int runtime_invisible_type_annotations_length = 0;
3427 bool runtime_invisible_type_annotations_exists = false;
3428 bool runtime_invisible_annotations_exists = false;
3429 bool parsed_source_debug_ext_annotations_exist = false;
3430 const u1* inner_classes_attribute_start = NULL;
3431 u4 inner_classes_attribute_length = 0;
3432 const u1* value_types_attribute_start = NULL;
3433 u4 value_types_attribute_length = 0;
3434 u2 enclosing_method_class_index = 0;
3435 u2 enclosing_method_method_index = 0;
3436 // Iterate over attributes
3437 while (attributes_count--) {
3438 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3439 const u2 attribute_name_index = cfs->get_u2_fast();
3440 const u4 attribute_length = cfs->get_u4_fast();
3441 check_property(
3442 valid_symbol_at(attribute_name_index),
3443 "Attribute name has bad constant pool index %u in class file %s",
3444 attribute_name_index, CHECK);
3445 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3446 if (tag == vmSymbols::tag_source_file()) {
3447 // Check for SourceFile tag
3448 if (_need_verify) {
3449 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3450 }
3451 if (parsed_sourcefile_attribute) {
3452 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3453 } else {
3454 parsed_sourcefile_attribute = true;
3455 }
3456 parse_classfile_sourcefile_attribute(cfs, CHECK);
3457 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3458 // Check for SourceDebugExtension tag
3459 if (parsed_source_debug_ext_annotations_exist) {
3460 classfile_parse_error(
3461 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3462 }
3463 parsed_source_debug_ext_annotations_exist = true;
3464 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3465 } else if (tag == vmSymbols::tag_inner_classes()) {
3466 // Check for InnerClasses tag
3467 if (parsed_innerclasses_attribute) {
3468 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3469 } else {
3470 parsed_innerclasses_attribute = true;
3471 }
3472 inner_classes_attribute_start = cfs->current();
3473 inner_classes_attribute_length = attribute_length;
3474 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3475 } else if (tag == vmSymbols::tag_value_types()) {
3476 // Check for ValueTypes tag
3477 if (parsed_value_types_attribute) {
3478 classfile_parse_error("Multiple ValueTypes attributes in class file %s", CHECK);
3479 } else {
3480 parsed_value_types_attribute = true;
3481 }
3482 value_types_attribute_start = cfs->current();
3483 value_types_attribute_length = attribute_length;
3484 cfs->skip_u1(value_types_attribute_length, CHECK);
3485 } else if (tag == vmSymbols::tag_synthetic()) {
3486 // Check for Synthetic tag
3487 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3488 if (attribute_length != 0) {
3489 classfile_parse_error(
3490 "Invalid Synthetic classfile attribute length %u in class file %s",
3491 attribute_length, CHECK);
3492 }
3493 parse_classfile_synthetic_attribute(CHECK);
3494 } else if (tag == vmSymbols::tag_deprecated()) {
3495 // Check for Deprecatd tag - 4276120
3496 if (attribute_length != 0) {
3497 classfile_parse_error(
3498 "Invalid Deprecated classfile attribute length %u in class file %s",
3499 attribute_length, CHECK);
3500 }
3501 } else if (_major_version >= JAVA_1_5_VERSION) {
3502 if (tag == vmSymbols::tag_signature()) {
3503 if (_generic_signature_index != 0) {
3504 classfile_parse_error(
3505 "Multiple Signature attributes in class file %s", CHECK);
3506 }
3507 if (attribute_length != 2) {
3508 classfile_parse_error(
3509 "Wrong Signature attribute length %u in class file %s",
3510 attribute_length, CHECK);
3511 }
3512 parse_classfile_signature_attribute(cfs, CHECK);
3513 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3514 if (runtime_visible_annotations != NULL) {
3515 classfile_parse_error(
3516 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3517 }
3518 runtime_visible_annotations_length = attribute_length;
3519 runtime_visible_annotations = cfs->current();
3520 assert(runtime_visible_annotations != NULL, "null visible annotations");
3521 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3522 parse_annotations(cp,
3523 runtime_visible_annotations,
3524 runtime_visible_annotations_length,
3525 parsed_annotations,
3526 _loader_data,
3527 CHECK);
3528 cfs->skip_u1_fast(runtime_visible_annotations_length);
3529 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3530 if (runtime_invisible_annotations_exists) {
3531 classfile_parse_error(
3532 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3533 }
3534 runtime_invisible_annotations_exists = true;
3535 if (PreserveAllAnnotations) {
3536 runtime_invisible_annotations_length = attribute_length;
3537 runtime_invisible_annotations = cfs->current();
3538 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3539 }
3540 cfs->skip_u1(attribute_length, CHECK);
3541 } else if (tag == vmSymbols::tag_enclosing_method()) {
3542 if (parsed_enclosingmethod_attribute) {
3543 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3544 } else {
3545 parsed_enclosingmethod_attribute = true;
3546 }
3547 guarantee_property(attribute_length == 4,
3548 "Wrong EnclosingMethod attribute length %u in class file %s",
3549 attribute_length, CHECK);
3550 cfs->guarantee_more(4, CHECK); // class_index, method_index
3551 enclosing_method_class_index = cfs->get_u2_fast();
3552 enclosing_method_method_index = cfs->get_u2_fast();
3553 if (enclosing_method_class_index == 0) {
3554 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3555 }
3556 // Validate the constant pool indices and types
3557 check_property(valid_klass_reference_at(enclosing_method_class_index),
3558 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3559 if (enclosing_method_method_index != 0 &&
3560 (!cp->is_within_bounds(enclosing_method_method_index) ||
3561 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3562 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3563 }
3564 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3565 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3566 if (parsed_bootstrap_methods_attribute) {
3567 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3568 }
3569 parsed_bootstrap_methods_attribute = true;
3570 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3571 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3572 if (runtime_visible_type_annotations != NULL) {
3573 classfile_parse_error(
3574 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3575 }
3576 runtime_visible_type_annotations_length = attribute_length;
3577 runtime_visible_type_annotations = cfs->current();
3578 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3579 // No need for the VM to parse Type annotations
3580 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3581 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3582 if (runtime_invisible_type_annotations_exists) {
3583 classfile_parse_error(
3584 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3585 } else {
3586 runtime_invisible_type_annotations_exists = true;
3587 }
3588 if (PreserveAllAnnotations) {
3589 runtime_invisible_type_annotations_length = attribute_length;
3590 runtime_invisible_type_annotations = cfs->current();
3591 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3592 }
3593 cfs->skip_u1(attribute_length, CHECK);
3594 } else {
3595 // Unknown attribute
3596 cfs->skip_u1(attribute_length, CHECK);
3597 }
3598 } else {
3599 // Unknown attribute
3600 cfs->skip_u1(attribute_length, CHECK);
3601 }
3602 }
3603 _annotations = assemble_annotations(runtime_visible_annotations,
3604 runtime_visible_annotations_length,
3605 runtime_invisible_annotations,
3606 runtime_invisible_annotations_length,
3607 CHECK);
3608 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3609 runtime_visible_type_annotations_length,
3610 runtime_invisible_type_annotations,
3611 runtime_invisible_type_annotations_length,
3612 CHECK);
3613
3614 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3615 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3616 cfs,
3617 inner_classes_attribute_start,
3618 parsed_innerclasses_attribute,
3619 enclosing_method_class_index,
3620 enclosing_method_method_index,
3621 CHECK);
3622 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3623 guarantee_property(
3624 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3625 "Wrong InnerClasses attribute length in class file %s", CHECK);
3626 }
3627 }
3628
3629 if (parsed_value_types_attribute) {
3630 parse_value_types_attribute(cfs, value_types_attribute_start, CHECK);
3631 }
3632
3633 if (_max_bootstrap_specifier_index >= 0) {
3634 guarantee_property(parsed_bootstrap_methods_attribute,
3635 "Missing BootstrapMethods attribute in class file %s", CHECK);
3636 }
3637 }
3638
3639 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3640 assert(k != NULL, "invariant");
3641
3642 if (_synthetic_flag)
3643 k->set_is_synthetic();
3644 if (_sourcefile_index != 0) {
3645 k->set_source_file_name_index(_sourcefile_index);
3646 }
3647 if (_generic_signature_index != 0) {
3648 k->set_generic_signature_index(_generic_signature_index);
3649 }
3650 if (_sde_buffer != NULL) {
3651 k->set_source_debug_extension(_sde_buffer, _sde_length);
3652 }
3653 }
3654
3655 // Create the Annotations object that will
3656 // hold the annotations array for the Klass.
3657 void ClassFileParser::create_combined_annotations(TRAPS) {
3658 if (_annotations == NULL &&
3659 _type_annotations == NULL &&
3660 _fields_annotations == NULL &&
3661 _fields_type_annotations == NULL) {
3662 // Don't create the Annotations object unnecessarily.
3663 return;
3664 }
3665
3666 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3667 annotations->set_class_annotations(_annotations);
3668 annotations->set_class_type_annotations(_type_annotations);
3669 annotations->set_fields_annotations(_fields_annotations);
3670 annotations->set_fields_type_annotations(_fields_type_annotations);
3671
3672 // This is the Annotations object that will be
3673 // assigned to InstanceKlass being constructed.
3674 _combined_annotations = annotations;
3675
3676 // The annotations arrays below has been transfered the
3677 // _combined_annotations so these fields can now be cleared.
3678 _annotations = NULL;
3679 _type_annotations = NULL;
3680 _fields_annotations = NULL;
3681 _fields_type_annotations = NULL;
3682 }
3683
3684 // Transfer ownership of metadata allocated to the InstanceKlass.
3685 void ClassFileParser::apply_parsed_class_metadata(
3686 InstanceKlass* this_klass,
3687 int java_fields_count, TRAPS) {
3688 assert(this_klass != NULL, "invariant");
3689
3690 _cp->set_pool_holder(this_klass);
3691 this_klass->set_constants(_cp);
3692 this_klass->set_fields(_fields, java_fields_count);
3693 this_klass->set_methods(_methods);
3694 this_klass->set_inner_classes(_inner_classes);
3695 this_klass->set_value_types(_value_types);
3696 this_klass->set_local_interfaces(_local_interfaces);
3697 this_klass->set_transitive_interfaces(_transitive_interfaces);
3698 this_klass->set_annotations(_combined_annotations);
3699
3700 // Clear out these fields so they don't get deallocated by the destructor
3701 clear_class_metadata();
3702 }
3703
3704 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3705 int runtime_visible_annotations_length,
3706 const u1* const runtime_invisible_annotations,
3707 int runtime_invisible_annotations_length,
3708 TRAPS) {
3709 AnnotationArray* annotations = NULL;
3710 if (runtime_visible_annotations != NULL ||
3711 runtime_invisible_annotations != NULL) {
3712 annotations = MetadataFactory::new_array<u1>(_loader_data,
3713 runtime_visible_annotations_length +
3714 runtime_invisible_annotations_length,
3715 CHECK_(annotations));
3716 if (runtime_visible_annotations != NULL) {
3717 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3718 annotations->at_put(i, runtime_visible_annotations[i]);
3719 }
3720 }
3721 if (runtime_invisible_annotations != NULL) {
3722 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3723 int append = runtime_visible_annotations_length+i;
3724 annotations->at_put(append, runtime_invisible_annotations[i]);
3725 }
3726 }
3727 }
3728 return annotations;
3729 }
3730
3731 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3732 const int super_class_index,
3733 const bool need_verify,
3734 TRAPS) {
3735 assert(cp != NULL, "invariant");
3736 const InstanceKlass* super_klass = NULL;
3737
3738 if (super_class_index == 0) {
3739 check_property(_class_name == vmSymbols::java_lang_Object()
3740 || (_access_flags.get_flags() & JVM_ACC_VALUE),
3741 "Invalid superclass index %u in class file %s",
3742 super_class_index,
3743 CHECK_NULL);
3744 } else {
3745 check_property(valid_klass_reference_at(super_class_index),
3746 "Invalid superclass index %u in class file %s",
3747 super_class_index,
3748 CHECK_NULL);
3749 // The class name should be legal because it is checked when parsing constant pool.
3750 // However, make sure it is not an array type.
3751 bool is_array = false;
3752 if (cp->tag_at(super_class_index).is_klass()) {
3753 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3754 if (need_verify)
3755 is_array = super_klass->is_array_klass();
3756 } else if (need_verify) {
3757 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3758 }
3759 if (need_verify) {
3760 guarantee_property(!is_array,
3761 "Bad superclass name in class file %s", CHECK_NULL);
3762 }
3763 }
3764 return super_klass;
3765 }
3766
3767 #ifndef PRODUCT
3768 static void print_field_layout(const Symbol* name,
3769 Array<u2>* fields,
3770 const constantPoolHandle& cp,
3771 int instance_size,
3772 int instance_fields_start,
3773 int instance_fields_end,
3774 int static_fields_end) {
3775
3776 assert(name != NULL, "invariant");
3777
3778 tty->print("%s: field layout\n", name->as_klass_external_name());
3779 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3780 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3781 if (!fs.access_flags().is_static()) {
3782 tty->print(" @%3d \"%s\" %s\n",
3783 fs.offset(),
3784 fs.name()->as_klass_external_name(),
3785 fs.signature()->as_klass_external_name());
3786 }
3787 }
3788 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3789 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3790 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3791 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3792 if (fs.access_flags().is_static()) {
3793 tty->print(" @%3d \"%s\" %s\n",
3794 fs.offset(),
3795 fs.name()->as_klass_external_name(),
3796 fs.signature()->as_klass_external_name());
3797 }
3798 }
3799 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3800 tty->print("\n");
3801 }
3802 #endif
3803
3804 // Values needed for oopmap and InstanceKlass creation
3805 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3806 public:
3807 OopMapBlocksBuilder* oop_map_blocks;
3808 int instance_size;
3809 int nonstatic_field_size;
3810 int static_field_size;
3811 bool has_nonstatic_fields;
3812 };
3813
3814 // Utility to collect and compact oop maps during layout
3815 class ClassFileParser::OopMapBlocksBuilder : public ResourceObj {
3816 public:
3817 OopMapBlock* nonstatic_oop_maps;
3818 unsigned int nonstatic_oop_map_count;
3819 unsigned int max_nonstatic_oop_maps;
3820
3821 public:
3822 OopMapBlocksBuilder(unsigned int max_blocks, TRAPS) {
3823 max_nonstatic_oop_maps = max_blocks;
3824 nonstatic_oop_map_count = 0;
3825 if (max_blocks == 0) {
3826 nonstatic_oop_maps = NULL;
3827 } else {
3828 nonstatic_oop_maps = NEW_RESOURCE_ARRAY_IN_THREAD(
3829 THREAD, OopMapBlock, max_nonstatic_oop_maps);
3830 memset(nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
3831 }
3832 }
3833
3834 OopMapBlock* last_oop_map() const {
3835 assert(nonstatic_oop_map_count > 0, "Has no oop maps");
3836 return nonstatic_oop_maps + (nonstatic_oop_map_count - 1);
3837 }
3838
3839 // addition of super oop maps
3840 void initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
3841 assert(nof_blocks && nonstatic_oop_map_count == 0 &&
3842 nof_blocks <= max_nonstatic_oop_maps, "invariant");
3843
3844 memcpy(nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
3845 nonstatic_oop_map_count += nof_blocks;
3846 }
3847
3848 // collection of oops
3849 void add(int offset, int count) {
3850 if (nonstatic_oop_map_count == 0) {
3851 nonstatic_oop_map_count++;
3852 }
3853 OopMapBlock* nonstatic_oop_map = last_oop_map();
3854 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
3855 nonstatic_oop_map->set_offset(offset);
3856 nonstatic_oop_map->set_count(count);
3857 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
3858 nonstatic_oop_map->increment_count(count);
3859 } else { // Need a new one...
3860 nonstatic_oop_map_count++;
3861 assert(nonstatic_oop_map_count <= max_nonstatic_oop_maps, "range check");
3862 nonstatic_oop_map = last_oop_map();
3863 nonstatic_oop_map->set_offset(offset);
3864 nonstatic_oop_map->set_count(count);
3865 }
3866 }
3867
3868 // general purpose copy, e.g. into allocated instanceKlass
3869 void copy(OopMapBlock* dst) {
3870 if (nonstatic_oop_map_count != 0) {
3871 memcpy(dst, nonstatic_oop_maps, sizeof(OopMapBlock) * nonstatic_oop_map_count);
3872 }
3873 }
3874
3875 // Sort and compact adjacent blocks
3876 void compact(TRAPS) {
3877 if (nonstatic_oop_map_count <= 1) {
3878 return;
3879 }
3880 /*
3881 * Since field layout sneeks in oops before values, we will be able to condense
3882 * blocks. There is potential to compact between super, own refs and values
3883 * containing refs.
3884 *
3885 * Currently compaction is slightly limited due to values being 8 byte aligned.
3886 * This may well change: FixMe if doesn't, the code below is fairly general purpose
3887 * and maybe it doesn't need to be.
3888 */
3889 qsort(nonstatic_oop_maps, nonstatic_oop_map_count, sizeof(OopMapBlock),
3890 (_sort_Fn)OopMapBlock::compare_offset);
3891 if (nonstatic_oop_map_count < 2) {
3892 return;
3893 }
3894
3895 //Make a temp copy, and iterate through and copy back into the orig
3896 ResourceMark rm(THREAD);
3897 OopMapBlock* oop_maps_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, OopMapBlock,
3898 nonstatic_oop_map_count);
3899 OopMapBlock* oop_maps_copy_end = oop_maps_copy + nonstatic_oop_map_count;
3900 copy(oop_maps_copy);
3901 OopMapBlock* nonstatic_oop_map = nonstatic_oop_maps;
3902 unsigned int new_count = 1;
3903 oop_maps_copy++;
3904 while(oop_maps_copy < oop_maps_copy_end) {
3905 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
3906 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
3907 nonstatic_oop_map->increment_count(oop_maps_copy->count());
3908 } else {
3909 nonstatic_oop_map++;
3910 new_count++;
3911 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
3912 nonstatic_oop_map->set_count(oop_maps_copy->count());
3913 }
3914 oop_maps_copy++;
3915 }
3916 assert(new_count <= nonstatic_oop_map_count, "end up with more maps after compact() ?");
3917 nonstatic_oop_map_count = new_count;
3918 }
3919
3920 void print_on(outputStream* st) const {
3921 st->print_cr(" OopMapBlocks: %3d /%3d", nonstatic_oop_map_count, max_nonstatic_oop_maps);
3922 if (nonstatic_oop_map_count > 0) {
3923 OopMapBlock* map = nonstatic_oop_maps;
3924 OopMapBlock* last_map = last_oop_map();
3925 assert(map <= last_map, "Last less than first");
3926 while (map <= last_map) {
3927 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
3928 map->offset() + map->offset_span() - heapOopSize, map->count());
3929 map++;
3930 }
3931 }
3932 }
3933
3934 void print_value_on(outputStream* st) const {
3935 print_on(st);
3936 }
3937
3938 };
3939
3940 void ClassFileParser::throwValueTypeLimitation(THREAD_AND_LOCATION_DECL,
3941 const char* msg,
3942 const Symbol* name,
3943 const Symbol* sig) const {
3944
3945 ResourceMark rm(THREAD);
3946 if (name == NULL || sig == NULL) {
3947 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
3948 vmSymbols::java_lang_ClassFormatError(),
3949 "class: %s - %s", _class_name->as_C_string(), msg);
3950 }
3951 else {
3952 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
3953 vmSymbols::java_lang_ClassFormatError(),
3954 "\"%s\" sig: \"%s\" class: %s - %s", name->as_C_string(), sig->as_C_string(),
3955 _class_name->as_C_string(), msg);
3956 }
3957 }
3958
3959 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3960 void ClassFileParser::layout_fields(ConstantPool* cp,
3961 const FieldAllocationCount* fac,
3962 const ClassAnnotationCollector* parsed_annotations,
3963 FieldLayoutInfo* info,
3964 TRAPS) {
3965
3966 assert(cp != NULL, "invariant");
3967
3968 // Field size and offset computation
3969 int nonstatic_field_size = _super_klass == NULL ? 0 :
3970 _super_klass->nonstatic_field_size();
3971 int next_nonstatic_valuetype_offset = 0;
3972 int first_nonstatic_valuetype_offset = 0;
3973
3974 // Fields that are value types are handled differently depending if they are static or not:
3975 // - static fields are oops
3976 // - non-static fields are embedded
3977
3978 // Count the contended fields by type.
3979 //
3980 // We ignore static fields, because @Contended is not supported for them.
3981 // The layout code below will also ignore the static fields.
3982 int nonstatic_contended_count = 0;
3983 FieldAllocationCount fac_contended;
3984 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3985 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3986 if (fs.is_contended()) {
3987 fac_contended.count[atype]++;
3988 if (!fs.access_flags().is_static()) {
3989 nonstatic_contended_count++;
3990 }
3991 }
3992 }
3993
3994
3995 // Calculate the starting byte offsets
3996 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3997 // Value types in static fields are not embedded, they are handled with oops
3998 int next_static_double_offset = next_static_oop_offset +
3999 ((fac->count[STATIC_OOP] + fac->count[STATIC_FLATTENABLE]) * heapOopSize);
4000 if ( fac->count[STATIC_DOUBLE] &&
4001 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
4002 Universe::field_type_should_be_aligned(T_LONG)) ) {
4003 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
4004 }
4005
4006 int next_static_word_offset = next_static_double_offset +
4007 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
4008 int next_static_short_offset = next_static_word_offset +
4009 ((fac->count[STATIC_WORD]) * BytesPerInt);
4010 int next_static_byte_offset = next_static_short_offset +
4011 ((fac->count[STATIC_SHORT]) * BytesPerShort);
4012
4013 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
4014 nonstatic_field_size * heapOopSize;
4015
4016 // First field of value types is aligned on a long boundary in order to ease
4017 // in-lining of value types (with header removal) in packed arrays and
4018 // flatten value types
4019 int initial_value_type_padding = 0;
4020 if (is_value_type()) {
4021 int old = nonstatic_fields_start;
4022 nonstatic_fields_start = align_up(nonstatic_fields_start, BytesPerLong);
4023 initial_value_type_padding = nonstatic_fields_start - old;
4024 }
4025
4026 int next_nonstatic_field_offset = nonstatic_fields_start;
4027
4028 const bool is_contended_class = parsed_annotations->is_contended();
4029
4030 // Class is contended, pad before all the fields
4031 if (is_contended_class) {
4032 next_nonstatic_field_offset += ContendedPaddingWidth;
4033 }
4034
4035 // Temporary value types restrictions
4036 if (is_value_type()) {
4037 if (is_contended_class) {
4038 throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support @Contended annotation yet");
4039 return;
4040 }
4041 }
4042
4043 // Compute the non-contended fields count.
4044 // The packing code below relies on these counts to determine if some field
4045 // can be squeezed into the alignment gap. Contended fields are obviously
4046 // exempt from that.
4047 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
4048 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
4049 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
4050 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
4051 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
4052
4053 int static_value_type_count = 0;
4054 int nonstatic_value_type_count = 0;
4055 int* nonstatic_value_type_indexes = NULL;
4056 Klass** nonstatic_value_type_klasses = NULL;
4057 unsigned int value_type_oop_map_count = 0;
4058 int not_flattened_value_types = 0;
4059
4060 int max_nonstatic_value_type = fac->count[NONSTATIC_FLATTENABLE] + 1;
4061
4062 nonstatic_value_type_indexes = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, int,
4063 max_nonstatic_value_type);
4064 for (int i = 0; i < max_nonstatic_value_type; i++) {
4065 nonstatic_value_type_indexes[i] = -1;
4066 }
4067 nonstatic_value_type_klasses = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, Klass*,
4068 max_nonstatic_value_type);
4069
4070 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
4071 if (fs.allocation_type() == STATIC_FLATTENABLE) {
4072 // Pre-resolve the flattenable field and check for value type circularity
4073 // issues. Note that super-class circularity checks are not needed here
4074 // because flattenable fields can only be in value types and value types
4075 // only have java.lang.Object as their super class.
4076 // Also, note that super-interface circularity checks are not needed
4077 // because interfaces cannot be value types.
4078 ResourceMark rm;
4079 Symbol* sig = fs.signature();
4080 Symbol* name = SymbolTable::lookup(sig->as_C_string() + 1,
4081 sig->utf8_length() - 2, CHECK);
4082 if (!InstanceKlass::is_declared_value_type(_cp, _value_types, name)) {
4083 name->decrement_refcount();
4084 THROW(vmSymbols::java_lang_ClassFormatError());
4085 }
4086 name->decrement_refcount();
4087 Klass* klass =
4088 SystemDictionary::resolve_flattenable_field_or_fail(&fs,
4089 Handle(THREAD, _loader_data->class_loader()),
4090 _protection_domain, true, CHECK);
4091 assert(klass != NULL, "Sanity check");
4092 if (!klass->access_flags().is_value_type()) {
4093 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
4094 }
4095 static_value_type_count++;
4096 } else if (fs.allocation_type() == NONSTATIC_FLATTENABLE) {
4097 // Pre-resolve the flattenable field and check for value type circularity issues.
4098 ResourceMark rm;
4099 Symbol* sig = fs.signature();
4100 Symbol* name = SymbolTable::lookup(sig->as_C_string() + 1,
4101 sig->utf8_length() - 2, CHECK);
4102 if (!InstanceKlass::is_declared_value_type(_cp, _value_types, name)) {
4103 name->decrement_refcount();
4104 char* name = fs.name()->as_C_string();
4105 char* signature = fs.signature()->as_C_string();
4106 THROW(vmSymbols::java_lang_ClassFormatError());
4107 }
4108 name->decrement_refcount();
4109 Klass* klass =
4110 SystemDictionary::resolve_flattenable_field_or_fail(&fs,
4111 Handle(THREAD, _loader_data->class_loader()),
4112 _protection_domain, true, CHECK);
4113 assert(klass != NULL, "Sanity check");
4114 if (!klass->access_flags().is_value_type()) {
4115 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
4116 }
4117 ValueKlass* vk = ValueKlass::cast(klass);
4118 // Conditions to apply flattening or not should be defined in a single place
4119 if ((ValueFieldMaxFlatSize < 0) || (vk->size_helper() * HeapWordSize) <= ValueFieldMaxFlatSize) {
4120 nonstatic_value_type_indexes[nonstatic_value_type_count] = fs.index();
4121 nonstatic_value_type_klasses[nonstatic_value_type_count] = klass;
4122 nonstatic_value_type_count++;
4123
4124 ValueKlass* vklass = ValueKlass::cast(klass);
4125 if (vklass->contains_oops()) {
4126 value_type_oop_map_count += vklass->nonstatic_oop_map_count();
4127 }
4128 fs.set_flattened(true);
4129 } else {
4130 not_flattened_value_types++;
4131 fs.set_flattened(false);
4132 }
4133 }
4134 }
4135
4136 // Adjusting non_static_oop_count to take into account not flattened value types;
4137 nonstatic_oop_count += not_flattened_value_types;
4138
4139 // Total non-static fields count, including every contended field
4140 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
4141 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
4142 fac->count[NONSTATIC_OOP] + fac->count[NONSTATIC_FLATTENABLE];
4143
4144 const bool super_has_nonstatic_fields =
4145 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
4146 const bool has_nonstatic_fields =
4147 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
4148 const bool has_nonstatic_value_fields = nonstatic_value_type_count > 0;
4149
4150 if (is_value_type() && (!has_nonstatic_fields)) {
4151 // There are a number of fixes required throughout the type system and JIT
4152 throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support zero instance size yet");
4153 }
4154
4155 // Prepare list of oops for oop map generation.
4156 //
4157 // "offset" and "count" lists are describing the set of contiguous oop
4158 // regions. offset[i] is the start of the i-th region, which then has
4159 // count[i] oops following. Before we know how many regions are required,
4160 // we pessimistically allocate the maps to fit all the oops into the
4161 // distinct regions.
4162 //
4163 int super_oop_map_count = (_super_klass == NULL) ? 0 :_super_klass->nonstatic_oop_map_count();
4164 int max_oop_map_count =
4165 super_oop_map_count +
4166 fac->count[NONSTATIC_OOP] +
4167 value_type_oop_map_count +
4168 not_flattened_value_types;
4169
4170 OopMapBlocksBuilder* nonstatic_oop_maps = new OopMapBlocksBuilder(max_oop_map_count, THREAD);
4171 if (super_oop_map_count > 0) {
4172 nonstatic_oop_maps->initialize_inherited_blocks(_super_klass->start_of_nonstatic_oop_maps(),
4173 _super_klass->nonstatic_oop_map_count());
4174 }
4175
4176 int first_nonstatic_oop_offset = 0; // will be set for first oop field
4177
4178 bool compact_fields = CompactFields;
4179 int allocation_style = FieldsAllocationStyle;
4180 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
4181 assert(false, "0 <= FieldsAllocationStyle <= 2");
4182 allocation_style = 1; // Optimistic
4183 }
4184
4185 // The next classes have predefined hard-coded fields offsets
4186 // (see in JavaClasses::compute_hard_coded_offsets()).
4187 // Use default fields allocation order for them.
4188 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
4189 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
4190 _class_name == vmSymbols::java_lang_Class() ||
4191 _class_name == vmSymbols::java_lang_ClassLoader() ||
4192 _class_name == vmSymbols::java_lang_ref_Reference() ||
4193 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
4194 _class_name == vmSymbols::java_lang_StackTraceElement() ||
4195 _class_name == vmSymbols::java_lang_String() ||
4196 _class_name == vmSymbols::java_lang_Throwable() ||
4197 _class_name == vmSymbols::java_lang_Boolean() ||
4198 _class_name == vmSymbols::java_lang_Character() ||
4199 _class_name == vmSymbols::java_lang_Float() ||
4200 _class_name == vmSymbols::java_lang_Double() ||
4201 _class_name == vmSymbols::java_lang_Byte() ||
4202 _class_name == vmSymbols::java_lang_Short() ||
4203 _class_name == vmSymbols::java_lang_Integer() ||
4204 _class_name == vmSymbols::java_lang_Long())) {
4205 allocation_style = 0; // Allocate oops first
4206 compact_fields = false; // Don't compact fields
4207 }
4208
4209 int next_nonstatic_oop_offset = 0;
4210 int next_nonstatic_double_offset = 0;
4211
4212 // Rearrange fields for a given allocation style
4213 if( allocation_style == 0 ) {
4214 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
4215 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4216 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4217 (nonstatic_oop_count * heapOopSize);
4218 } else if( allocation_style == 1 ) {
4219 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
4220 next_nonstatic_double_offset = next_nonstatic_field_offset;
4221 } else if( allocation_style == 2 ) {
4222 // Fields allocation: oops fields in super and sub classes are together.
4223 if( nonstatic_field_size > 0 && super_oop_map_count > 0 ) {
4224 if (next_nonstatic_field_offset == nonstatic_oop_maps->last_oop_map()->end_offset()) {
4225 allocation_style = 0; // allocate oops first
4226 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4227 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4228 (nonstatic_oop_count * heapOopSize);
4229 }
4230 }
4231 if( allocation_style == 2 ) {
4232 allocation_style = 1; // allocate oops last
4233 next_nonstatic_double_offset = next_nonstatic_field_offset;
4234 }
4235 } else {
4236 ShouldNotReachHere();
4237 }
4238
4239 int nonstatic_oop_space_count = 0;
4240 int nonstatic_word_space_count = 0;
4241 int nonstatic_short_space_count = 0;
4242 int nonstatic_byte_space_count = 0;
4243 int nonstatic_oop_space_offset = 0;
4244 int nonstatic_word_space_offset = 0;
4245 int nonstatic_short_space_offset = 0;
4246 int nonstatic_byte_space_offset = 0;
4247
4248 // Try to squeeze some of the fields into the gaps due to
4249 // long/double alignment.
4250 if (nonstatic_double_count > 0) {
4251 int offset = next_nonstatic_double_offset;
4252 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
4253 if (compact_fields && offset != next_nonstatic_double_offset) {
4254 // Allocate available fields into the gap before double field.
4255 int length = next_nonstatic_double_offset - offset;
4256 assert(length == BytesPerInt, "");
4257 nonstatic_word_space_offset = offset;
4258 if (nonstatic_word_count > 0) {
4259 nonstatic_word_count -= 1;
4260 nonstatic_word_space_count = 1; // Only one will fit
4261 length -= BytesPerInt;
4262 offset += BytesPerInt;
4263 }
4264 nonstatic_short_space_offset = offset;
4265 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4266 nonstatic_short_count -= 1;
4267 nonstatic_short_space_count += 1;
4268 length -= BytesPerShort;
4269 offset += BytesPerShort;
4270 }
4271 nonstatic_byte_space_offset = offset;
4272 while (length > 0 && nonstatic_byte_count > 0) {
4273 nonstatic_byte_count -= 1;
4274 nonstatic_byte_space_count += 1;
4275 length -= 1;
4276 }
4277 // Allocate oop field in the gap if there are no other fields for that.
4278 nonstatic_oop_space_offset = offset;
4279 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4280 allocation_style != 0) { // when oop fields not first
4281 nonstatic_oop_count -= 1;
4282 nonstatic_oop_space_count = 1; // Only one will fit
4283 length -= heapOopSize;
4284 offset += heapOopSize;
4285 }
4286 }
4287 }
4288
4289 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4290 (nonstatic_double_count * BytesPerLong);
4291 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4292 (nonstatic_word_count * BytesPerInt);
4293 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4294 (nonstatic_short_count * BytesPerShort);
4295 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4296 nonstatic_byte_count;
4297
4298 // let oops jump before padding with this allocation style
4299 if( allocation_style == 1 ) {
4300 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4301 if( nonstatic_oop_count > 0 ) {
4302 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4303 }
4304 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4305 }
4306
4307 // Aligning embedded value types
4308 // bug below, the current algorithm to layout embedded value types always put them at the
4309 // end of the layout, which doesn't match the different allocation policies the VM is
4310 // supposed to provide => FixMe
4311 // Note also that the current alignment policy is to make each value type starting on a
4312 // 64 bits boundary. This could be optimized later. For instance, it could be nice to
4313 // align value types according to their most constrained internal type.
4314 next_nonstatic_valuetype_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4315 int next_value_type_index = 0;
4316
4317 // Iterate over fields again and compute correct offsets.
4318 // The field allocation type was temporarily stored in the offset slot.
4319 // oop fields are located before non-oop fields (static and non-static).
4320 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4321
4322 // skip already laid out fields
4323 if (fs.is_offset_set()) continue;
4324
4325 // contended instance fields are handled below
4326 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4327
4328 int real_offset = 0;
4329 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4330
4331 // pack the rest of the fields
4332 switch (atype) {
4333 // Value types in static fields are handled with oops
4334 case STATIC_FLATTENABLE: // Fallthrough
4335 case STATIC_OOP:
4336 real_offset = next_static_oop_offset;
4337 next_static_oop_offset += heapOopSize;
4338 break;
4339 case STATIC_BYTE:
4340 real_offset = next_static_byte_offset;
4341 next_static_byte_offset += 1;
4342 break;
4343 case STATIC_SHORT:
4344 real_offset = next_static_short_offset;
4345 next_static_short_offset += BytesPerShort;
4346 break;
4347 case STATIC_WORD:
4348 real_offset = next_static_word_offset;
4349 next_static_word_offset += BytesPerInt;
4350 break;
4351 case STATIC_DOUBLE:
4352 real_offset = next_static_double_offset;
4353 next_static_double_offset += BytesPerLong;
4354 break;
4355 case NONSTATIC_FLATTENABLE:
4356 if (fs.is_flattened()) {
4357 Klass* klass = nonstatic_value_type_klasses[next_value_type_index];
4358 assert(klass != NULL, "Klass should have been loaded and resolved earlier");
4359 assert(klass->access_flags().is_value_type(),"Must be a value type");
4360 ValueKlass* vklass = ValueKlass::cast(klass);
4361 real_offset = next_nonstatic_valuetype_offset;
4362 next_nonstatic_valuetype_offset += (vklass->size_helper()) * wordSize - vklass->first_field_offset();
4363 // aligning next value type on a 64 bits boundary
4364 next_nonstatic_valuetype_offset = align_up(next_nonstatic_valuetype_offset, BytesPerLong);
4365 next_value_type_index += 1;
4366
4367 if (vklass->contains_oops()) { // add flatten oop maps
4368 int diff = real_offset - vklass->first_field_offset();
4369 const OopMapBlock* map = vklass->start_of_nonstatic_oop_maps();
4370 const OopMapBlock* const last_map = map + vklass->nonstatic_oop_map_count();
4371 while (map < last_map) {
4372 nonstatic_oop_maps->add(map->offset() + diff, map->count());
4373 map++;
4374 }
4375 }
4376 break;
4377 } else {
4378 // Fall through
4379 }
4380 case NONSTATIC_OOP:
4381 if( nonstatic_oop_space_count > 0 ) {
4382 real_offset = nonstatic_oop_space_offset;
4383 nonstatic_oop_space_offset += heapOopSize;
4384 nonstatic_oop_space_count -= 1;
4385 } else {
4386 real_offset = next_nonstatic_oop_offset;
4387 next_nonstatic_oop_offset += heapOopSize;
4388 }
4389 nonstatic_oop_maps->add(real_offset, 1);
4390 break;
4391 case NONSTATIC_BYTE:
4392 if( nonstatic_byte_space_count > 0 ) {
4393 real_offset = nonstatic_byte_space_offset;
4394 nonstatic_byte_space_offset += 1;
4395 nonstatic_byte_space_count -= 1;
4396 } else {
4397 real_offset = next_nonstatic_byte_offset;
4398 next_nonstatic_byte_offset += 1;
4399 }
4400 break;
4401 case NONSTATIC_SHORT:
4402 if( nonstatic_short_space_count > 0 ) {
4403 real_offset = nonstatic_short_space_offset;
4404 nonstatic_short_space_offset += BytesPerShort;
4405 nonstatic_short_space_count -= 1;
4406 } else {
4407 real_offset = next_nonstatic_short_offset;
4408 next_nonstatic_short_offset += BytesPerShort;
4409 }
4410 break;
4411 case NONSTATIC_WORD:
4412 if( nonstatic_word_space_count > 0 ) {
4413 real_offset = nonstatic_word_space_offset;
4414 nonstatic_word_space_offset += BytesPerInt;
4415 nonstatic_word_space_count -= 1;
4416 } else {
4417 real_offset = next_nonstatic_word_offset;
4418 next_nonstatic_word_offset += BytesPerInt;
4419 }
4420 break;
4421 case NONSTATIC_DOUBLE:
4422 real_offset = next_nonstatic_double_offset;
4423 next_nonstatic_double_offset += BytesPerLong;
4424 break;
4425 default:
4426 ShouldNotReachHere();
4427 }
4428 fs.set_offset(real_offset);
4429 }
4430
4431
4432 // Handle the contended cases.
4433 //
4434 // Each contended field should not intersect the cache line with another contended field.
4435 // In the absence of alignment information, we end up with pessimistically separating
4436 // the fields with full-width padding.
4437 //
4438 // Additionally, this should not break alignment for the fields, so we round the alignment up
4439 // for each field.
4440 if (nonstatic_contended_count > 0) {
4441
4442 // if there is at least one contended field, we need to have pre-padding for them
4443 next_nonstatic_padded_offset += ContendedPaddingWidth;
4444
4445 // collect all contended groups
4446 ResourceBitMap bm(cp->size());
4447 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4448 // skip already laid out fields
4449 if (fs.is_offset_set()) continue;
4450
4451 if (fs.is_contended()) {
4452 bm.set_bit(fs.contended_group());
4453 }
4454 }
4455
4456 int current_group = -1;
4457 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4458
4459 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4460
4461 // skip already laid out fields
4462 if (fs.is_offset_set()) continue;
4463
4464 // skip non-contended fields and fields from different group
4465 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4466
4467 // handle statics below
4468 if (fs.access_flags().is_static()) continue;
4469
4470 int real_offset = 0;
4471 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4472
4473 switch (atype) {
4474 case NONSTATIC_BYTE:
4475 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4476 real_offset = next_nonstatic_padded_offset;
4477 next_nonstatic_padded_offset += 1;
4478 break;
4479
4480 case NONSTATIC_SHORT:
4481 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4482 real_offset = next_nonstatic_padded_offset;
4483 next_nonstatic_padded_offset += BytesPerShort;
4484 break;
4485
4486 case NONSTATIC_WORD:
4487 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4488 real_offset = next_nonstatic_padded_offset;
4489 next_nonstatic_padded_offset += BytesPerInt;
4490 break;
4491
4492 case NONSTATIC_DOUBLE:
4493 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4494 real_offset = next_nonstatic_padded_offset;
4495 next_nonstatic_padded_offset += BytesPerLong;
4496 break;
4497
4498 // Value types in static fields are handled with oops
4499 case NONSTATIC_FLATTENABLE:
4500 throwValueTypeLimitation(THREAD_AND_LOCATION,
4501 "@Contended annotation not supported for value types yet", fs.name(), fs.signature());
4502 return;
4503
4504 case NONSTATIC_OOP:
4505 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4506 real_offset = next_nonstatic_padded_offset;
4507 next_nonstatic_padded_offset += heapOopSize;
4508 nonstatic_oop_maps->add(real_offset, 1);
4509 break;
4510
4511 default:
4512 ShouldNotReachHere();
4513 }
4514
4515 if (fs.contended_group() == 0) {
4516 // Contended group defines the equivalence class over the fields:
4517 // the fields within the same contended group are not inter-padded.
4518 // The only exception is default group, which does not incur the
4519 // equivalence, and so requires intra-padding.
4520 next_nonstatic_padded_offset += ContendedPaddingWidth;
4521 }
4522
4523 fs.set_offset(real_offset);
4524 } // for
4525
4526 // Start laying out the next group.
4527 // Note that this will effectively pad the last group in the back;
4528 // this is expected to alleviate memory contention effects for
4529 // subclass fields and/or adjacent object.
4530 // If this was the default group, the padding is already in place.
4531 if (current_group != 0) {
4532 next_nonstatic_padded_offset += ContendedPaddingWidth;
4533 }
4534 }
4535
4536 // handle static fields
4537 }
4538
4539 // Entire class is contended, pad in the back.
4540 // This helps to alleviate memory contention effects for subclass fields
4541 // and/or adjacent object.
4542 if (is_contended_class) {
4543 assert(!is_value_type(), "@Contended not supported for value types yet");
4544 next_nonstatic_padded_offset += ContendedPaddingWidth;
4545 }
4546
4547 int notaligned_nonstatic_fields_end;
4548 if (nonstatic_value_type_count != 0) {
4549 notaligned_nonstatic_fields_end = next_nonstatic_valuetype_offset;
4550 } else {
4551 notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4552 }
4553
4554 int nonstatic_field_sz_align = heapOopSize;
4555 if (is_value_type()) {
4556 if ((notaligned_nonstatic_fields_end - nonstatic_fields_start) > heapOopSize) {
4557 nonstatic_field_sz_align = BytesPerLong; // value copy of fields only uses jlong copy
4558 }
4559 }
4560 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, nonstatic_field_sz_align);
4561 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4562 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4563
4564 int static_field_size = (static_fields_end -
4565 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4566 nonstatic_field_size = nonstatic_field_size +
4567 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4568
4569 int instance_size = align_object_size(instance_end / wordSize);
4570
4571 assert(instance_size == align_object_size(align_up(
4572 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize)
4573 + initial_value_type_padding, wordSize) / wordSize), "consistent layout helper value");
4574
4575
4576 // Invariant: nonstatic_field end/start should only change if there are
4577 // nonstatic fields in the class, or if the class is contended. We compare
4578 // against the non-aligned value, so that end alignment will not fail the
4579 // assert without actually having the fields.
4580 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4581 is_contended_class ||
4582 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4583
4584 // Number of non-static oop map blocks allocated at end of klass.
4585 nonstatic_oop_maps->compact(THREAD);
4586
4587 #ifndef PRODUCT
4588 if ((PrintFieldLayout && !is_value_type()) ||
4589 (PrintValueLayout && (is_value_type() || has_nonstatic_value_fields))) {
4590 print_field_layout(_class_name,
4591 _fields,
4592 cp,
4593 instance_size,
4594 nonstatic_fields_start,
4595 nonstatic_fields_end,
4596 static_fields_end);
4597 nonstatic_oop_maps->print_on(tty);
4598 tty->print("\n");
4599 }
4600
4601 #endif
4602 // Pass back information needed for InstanceKlass creation
4603 info->oop_map_blocks = nonstatic_oop_maps;
4604 info->instance_size = instance_size;
4605 info->static_field_size = static_field_size;
4606 info->nonstatic_field_size = nonstatic_field_size;
4607 info->has_nonstatic_fields = has_nonstatic_fields;
4608 }
4609
4610 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4611 assert(ik != NULL, "invariant");
4612
4613 const Klass* const super = ik->super();
4614
4615 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4616 // in which case we don't have to register objects as finalizable
4617 if (!_has_empty_finalizer) {
4618 if (_has_finalizer ||
4619 (super != NULL && super->has_finalizer())) {
4620 ik->set_has_finalizer();
4621 }
4622 }
4623
4624 #ifdef ASSERT
4625 bool f = false;
4626 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4627 vmSymbols::void_method_signature());
4628 if (m != NULL && !m->is_empty_method()) {
4629 f = true;
4630 }
4631
4632 // Spec doesn't prevent agent from redefinition of empty finalizer.
4633 // Despite the fact that it's generally bad idea and redefined finalizer
4634 // will not work as expected we shouldn't abort vm in this case
4635 if (!ik->has_redefined_this_or_super()) {
4636 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4637 }
4638 #endif
4639
4640 // Check if this klass supports the java.lang.Cloneable interface
4641 if (SystemDictionary::Cloneable_klass_loaded()) {
4642 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4643 ik->set_is_cloneable();
4644 }
4645 }
4646
4647 // Check if this klass has a vanilla default constructor
4648 if (super == NULL) {
4649 // java.lang.Object has empty default constructor
4650 ik->set_has_vanilla_constructor();
4651 } else {
4652 if (super->has_vanilla_constructor() &&
4653 _has_vanilla_constructor) {
4654 ik->set_has_vanilla_constructor();
4655 }
4656 #ifdef ASSERT
4657 bool v = false;
4658 if (super->has_vanilla_constructor()) {
4659 const Method* const constructor =
4660 ik->find_method(vmSymbols::object_initializer_name(),
4661 vmSymbols::void_method_signature());
4662 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4663 v = true;
4664 }
4665 }
4666 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4667 #endif
4668 }
4669
4670 // If it cannot be fast-path allocated, set a bit in the layout helper.
4671 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4672 assert(ik->size_helper() > 0, "layout_helper is initialized");
4673 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4674 || ik->is_abstract() || ik->is_interface()
4675 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4676 || ik->size_helper() >= FastAllocateSizeLimit) {
4677 // Forbid fast-path allocation.
4678 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4679 ik->set_layout_helper(lh);
4680 }
4681 }
4682
4683 bool ClassFileParser::supports_value_types() const {
4684 // Value types are only supported by class file version 55 and later
4685 return _major_version >= JAVA_11_VERSION;
4686 }
4687
4688 // Attach super classes and interface classes to class loader data
4689 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4690 TRAPS) {
4691 assert(defined_klass != NULL, "invariant");
4692
4693 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4694 if (defining_loader_data->is_the_null_class_loader_data()) {
4695 // Dependencies to null class loader data are implicit.
4696 return;
4697 } else {
4698 // add super class dependency
4699 Klass* const super = defined_klass->super();
4700 if (super != NULL) {
4701 defining_loader_data->record_dependency(super, CHECK);
4702 }
4703
4704 // add super interface dependencies
4705 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4706 if (local_interfaces != NULL) {
4707 const int length = local_interfaces->length();
4708 for (int i = 0; i < length; i++) {
4709 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4710 }
4711 }
4712
4713 for(int i = 0; i < defined_klass->java_fields_count(); i++) {
4714 if ((defined_klass->field_access_flags(i) & JVM_ACC_FLATTENABLE) != 0) {
4715 const Klass* klass = defined_klass->get_value_field_klass(i);
4716 defining_loader_data->record_dependency(klass, CHECK);
4717 }
4718 }
4719 }
4720 }
4721
4722 // utility methods for appending an array with check for duplicates
4723
4724 static void append_interfaces(GrowableArray<Klass*>* result,
4725 const Array<Klass*>* const ifs) {
4726 // iterate over new interfaces
4727 for (int i = 0; i < ifs->length(); i++) {
4728 Klass* const e = ifs->at(i);
4729 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4730 // add new interface
4731 result->append_if_missing(e);
4732 }
4733 }
4734
4735 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4736 Array<Klass*>* local_ifs,
4737 ClassLoaderData* loader_data,
4738 TRAPS) {
4739 assert(local_ifs != NULL, "invariant");
4740 assert(loader_data != NULL, "invariant");
4741
4742 // Compute maximum size for transitive interfaces
4743 int max_transitive_size = 0;
4744 int super_size = 0;
4745 // Add superclass transitive interfaces size
4746 if (super != NULL) {
4747 super_size = super->transitive_interfaces()->length();
4748 max_transitive_size += super_size;
4749 }
4750 // Add local interfaces' super interfaces
4751 const int local_size = local_ifs->length();
4752 for (int i = 0; i < local_size; i++) {
4753 Klass* const l = local_ifs->at(i);
4754 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4755 }
4756 // Finally add local interfaces
4757 max_transitive_size += local_size;
4758 // Construct array
4759 if (max_transitive_size == 0) {
4760 // no interfaces, use canonicalized array
4761 return Universe::the_empty_klass_array();
4762 } else if (max_transitive_size == super_size) {
4763 // no new local interfaces added, share superklass' transitive interface array
4764 return super->transitive_interfaces();
4765 } else if (max_transitive_size == local_size) {
4766 // only local interfaces added, share local interface array
4767 return local_ifs;
4768 } else {
4769 ResourceMark rm;
4770 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4771
4772 // Copy down from superclass
4773 if (super != NULL) {
4774 append_interfaces(result, super->transitive_interfaces());
4775 }
4776
4777 // Copy down from local interfaces' superinterfaces
4778 for (int i = 0; i < local_size; i++) {
4779 Klass* const l = local_ifs->at(i);
4780 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4781 }
4782 // Finally add local interfaces
4783 append_interfaces(result, local_ifs);
4784
4785 // length will be less than the max_transitive_size if duplicates were removed
4786 const int length = result->length();
4787 assert(length <= max_transitive_size, "just checking");
4788 Array<Klass*>* const new_result =
4789 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4790 for (int i = 0; i < length; i++) {
4791 Klass* const e = result->at(i);
4792 assert(e != NULL, "just checking");
4793 new_result->at_put(i, e);
4794 }
4795 return new_result;
4796 }
4797 }
4798
4799 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4800 assert(this_klass != NULL, "invariant");
4801 const Klass* const super = this_klass->super();
4802 if (super != NULL) {
4803
4804 // If the loader is not the boot loader then throw an exception if its
4805 // superclass is in package jdk.internal.reflect and its loader is not a
4806 // special reflection class loader
4807 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4808 assert(super->is_instance_klass(), "super is not instance klass");
4809 PackageEntry* super_package = super->package();
4810 if (super_package != NULL &&
4811 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4812 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4813 ResourceMark rm(THREAD);
4814 Exceptions::fthrow(
4815 THREAD_AND_LOCATION,
4816 vmSymbols::java_lang_IllegalAccessError(),
4817 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4818 this_klass->external_name(),
4819 this_klass->class_loader_data()->loader_name(),
4820 super->external_name());
4821 return;
4822 }
4823 }
4824
4825 Reflection::VerifyClassAccessResults vca_result =
4826 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4827 if (vca_result != Reflection::ACCESS_OK) {
4828 ResourceMark rm(THREAD);
4829 char* msg = Reflection::verify_class_access_msg(this_klass,
4830 InstanceKlass::cast(super),
4831 vca_result);
4832 if (msg == NULL) {
4833 Exceptions::fthrow(
4834 THREAD_AND_LOCATION,
4835 vmSymbols::java_lang_IllegalAccessError(),
4836 "class %s cannot access its superclass %s",
4837 this_klass->external_name(),
4838 super->external_name());
4839 } else {
4840 // Add additional message content.
4841 Exceptions::fthrow(
4842 THREAD_AND_LOCATION,
4843 vmSymbols::java_lang_IllegalAccessError(),
4844 "superclass access check failed: %s",
4845 msg);
4846 }
4847 }
4848 }
4849 }
4850
4851
4852 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4853 assert(this_klass != NULL, "invariant");
4854 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4855 const int lng = local_interfaces->length();
4856 for (int i = lng - 1; i >= 0; i--) {
4857 Klass* const k = local_interfaces->at(i);
4858 assert (k != NULL && k->is_interface(), "invalid interface");
4859 Reflection::VerifyClassAccessResults vca_result =
4860 Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false);
4861 if (vca_result != Reflection::ACCESS_OK) {
4862 ResourceMark rm(THREAD);
4863 char* msg = Reflection::verify_class_access_msg(this_klass,
4864 InstanceKlass::cast(k),
4865 vca_result);
4866 if (msg == NULL) {
4867 Exceptions::fthrow(
4868 THREAD_AND_LOCATION,
4869 vmSymbols::java_lang_IllegalAccessError(),
4870 "class %s cannot access its superinterface %s",
4871 this_klass->external_name(),
4872 k->external_name());
4873 } else {
4874 // Add additional message content.
4875 Exceptions::fthrow(
4876 THREAD_AND_LOCATION,
4877 vmSymbols::java_lang_IllegalAccessError(),
4878 "superinterface check failed: %s",
4879 msg);
4880 }
4881 }
4882 }
4883 }
4884
4885
4886 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4887 assert(this_klass != NULL, "invariant");
4888 const Array<Method*>* const methods = this_klass->methods();
4889 const int num_methods = methods->length();
4890
4891 // go thru each method and check if it overrides a final method
4892 for (int index = 0; index < num_methods; index++) {
4893 const Method* const m = methods->at(index);
4894
4895 // skip private, static, and <init> methods
4896 if ((!m->is_private() && !m->is_static()) &&
4897 (m->name() != vmSymbols::object_initializer_name())) {
4898
4899 const Symbol* const name = m->name();
4900 const Symbol* const signature = m->signature();
4901 const Klass* k = this_klass->super();
4902 const Method* super_m = NULL;
4903 while (k != NULL) {
4904 // skip supers that don't have final methods.
4905 if (k->has_final_method()) {
4906 // lookup a matching method in the super class hierarchy
4907 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4908 if (super_m == NULL) {
4909 break; // didn't find any match; get out
4910 }
4911
4912 if (super_m->is_final() && !super_m->is_static() &&
4913 // matching method in super is final, and not static
4914 (Reflection::verify_field_access(this_klass,
4915 super_m->method_holder(),
4916 super_m->method_holder(),
4917 super_m->access_flags(), false))
4918 // this class can access super final method and therefore override
4919 ) {
4920 ResourceMark rm(THREAD);
4921 Exceptions::fthrow(
4922 THREAD_AND_LOCATION,
4923 vmSymbols::java_lang_VerifyError(),
4924 "class %s overrides final method %s.%s%s",
4925 this_klass->external_name(),
4926 super_m->method_holder()->external_name(),
4927 name->as_C_string(),
4928 signature->as_C_string()
4929 );
4930 return;
4931 }
4932
4933 // continue to look from super_m's holder's super.
4934 k = super_m->method_holder()->super();
4935 continue;
4936 }
4937
4938 k = k->super();
4939 }
4940 }
4941 }
4942 }
4943
4944
4945 // assumes that this_klass is an interface
4946 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4947 assert(this_klass != NULL, "invariant");
4948 assert(this_klass->is_interface(), "not an interface");
4949 const Array<Method*>* methods = this_klass->methods();
4950 const int num_methods = methods->length();
4951
4952 for (int index = 0; index < num_methods; index++) {
4953 const Method* const m = methods->at(index);
4954 // if m is static and not the init method, throw a verify error
4955 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4956 ResourceMark rm(THREAD);
4957 Exceptions::fthrow(
4958 THREAD_AND_LOCATION,
4959 vmSymbols::java_lang_VerifyError(),
4960 "Illegal static method %s in interface %s",
4961 m->name()->as_C_string(),
4962 this_klass->external_name()
4963 );
4964 return;
4965 }
4966 }
4967 }
4968
4969 // utility methods for format checking
4970
4971 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4972 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4973 const bool is_value_type = (flags & JVM_ACC_VALUE) != 0;
4974 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4975 assert(supports_value_types() || !is_value_type, "JVM_ACC_VALUE should not be set");
4976 if (is_module) {
4977 ResourceMark rm(THREAD);
4978 Exceptions::fthrow(
4979 THREAD_AND_LOCATION,
4980 vmSymbols::java_lang_NoClassDefFoundError(),
4981 "%s is not a class because access_flag ACC_MODULE is set",
4982 _class_name->as_C_string());
4983 return;
4984 }
4985
4986 if (!_need_verify) { return; }
4987
4988 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4989 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4990 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4991 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4992 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4993 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4994 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4995
4996 if ((is_abstract && is_final) ||
4997 (is_interface && !is_abstract) ||
4998 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4999 (!is_interface && major_gte_15 && is_annotation) ||
5000 (is_value_type && (is_interface || is_abstract || is_enum || !is_final))) {
5001 ResourceMark rm(THREAD);
5002 Exceptions::fthrow(
5003 THREAD_AND_LOCATION,
5004 vmSymbols::java_lang_ClassFormatError(),
5005 "Illegal class modifiers in class %s: 0x%X",
5006 _class_name->as_C_string(), flags
5007 );
5008 return;
5009 }
5010 }
5011
5012 static bool has_illegal_visibility(jint flags) {
5013 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
5014 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
5015 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
5016
5017 return ((is_public && is_protected) ||
5018 (is_public && is_private) ||
5019 (is_protected && is_private));
5020 }
5021
5022 static bool is_supported_version(u2 major, u2 minor) {
5023 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
5024 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
5025 (major <= max_version) &&
5026 ((major != max_version) ||
5027 (minor <= JVM_CLASSFILE_MINOR_VERSION));
5028 }
5029
5030 void ClassFileParser::verify_legal_field_modifiers(jint flags,
5031 bool is_interface,
5032 bool is_value_type,
5033 TRAPS) const {
5034 if (!_need_verify) { return; }
5035
5036 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
5037 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
5038 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
5039 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
5040 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
5041 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
5042 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
5043 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
5044 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
5045
5046 bool is_illegal = false;
5047
5048 if (is_interface) {
5049 if (!is_public || !is_static || !is_final || is_private ||
5050 is_protected || is_volatile || is_transient ||
5051 (major_gte_15 && is_enum)) {
5052 is_illegal = true;
5053 }
5054 } else { // not interface
5055 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
5056 is_illegal = true;
5057 } else {
5058 if (is_value_type && !is_static && !is_final) {
5059 is_illegal = true;
5060 }
5061 }
5062 }
5063
5064 if (is_illegal) {
5065 ResourceMark rm(THREAD);
5066 Exceptions::fthrow(
5067 THREAD_AND_LOCATION,
5068 vmSymbols::java_lang_ClassFormatError(),
5069 "Illegal field modifiers in class %s: 0x%X",
5070 _class_name->as_C_string(), flags);
5071 return;
5072 }
5073 }
5074
5075 void ClassFileParser::verify_legal_method_modifiers(jint flags,
5076 bool is_interface,
5077 bool is_value_type,
5078 const Symbol* name,
5079 TRAPS) const {
5080 if (!_need_verify) { return; }
5081
5082 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
5083 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
5084 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
5085 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
5086 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
5087 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
5088 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
5089 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
5090 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
5091 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
5092 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
5093 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
5094 const bool is_initializer = (name == vmSymbols::object_initializer_name());
5095
5096 bool is_illegal = false;
5097
5098 if (is_interface) {
5099 if (major_gte_8) {
5100 // Class file version is JAVA_8_VERSION or later Methods of
5101 // interfaces may set any of the flags except ACC_PROTECTED,
5102 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
5103 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
5104 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
5105 (is_native || is_protected || is_final || is_synchronized) ||
5106 // If a specific method of a class or interface has its
5107 // ACC_ABSTRACT flag set, it must not have any of its
5108 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
5109 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
5110 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
5111 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
5112 (is_abstract && (is_private || is_static || is_strict))) {
5113 is_illegal = true;
5114 }
5115 } else if (major_gte_15) {
5116 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
5117 if (!is_public || is_private || is_protected || is_static || is_final ||
5118 is_synchronized || is_native || !is_abstract || is_strict) {
5119 is_illegal = true;
5120 }
5121 } else {
5122 // Class file version is pre-JAVA_1_5_VERSION
5123 if (!is_public || is_static || is_final || is_native || !is_abstract) {
5124 is_illegal = true;
5125 }
5126 }
5127 } else { // not interface
5128 if (has_illegal_visibility(flags)) {
5129 is_illegal = true;
5130 } else {
5131 if (is_initializer) {
5132 if (is_static || is_final || is_synchronized || is_native ||
5133 is_abstract || (major_gte_15 && is_bridge)) {
5134 is_illegal = true;
5135 }
5136 } else { // not initializer
5137 if (is_value_type && is_synchronized && !is_static) {
5138 is_illegal = true;
5139 } else {
5140 if (is_abstract) {
5141 if ((is_final || is_native || is_private || is_static ||
5142 (major_gte_15 && (is_synchronized || is_strict)))) {
5143 is_illegal = true;
5144 }
5145 }
5146 }
5147 }
5148 }
5149 }
5150
5151 if (is_illegal) {
5152 ResourceMark rm(THREAD);
5153 Exceptions::fthrow(
5154 THREAD_AND_LOCATION,
5155 vmSymbols::java_lang_ClassFormatError(),
5156 "Method %s in class %s has illegal modifiers: 0x%X",
5157 name->as_C_string(), _class_name->as_C_string(), flags);
5158 return;
5159 }
5160 }
5161
5162 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
5163 int length,
5164 TRAPS) const {
5165 assert(_need_verify, "only called when _need_verify is true");
5166 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
5167 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5168 }
5169 }
5170
5171 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5172 // In class names, '/' separates unqualified names. This is verified in this function also.
5173 // Method names also may not contain the characters '<' or '>', unless <init>
5174 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5175 // method. Because these names have been checked as special cases before
5176 // calling this method in verify_legal_method_name.
5177 //
5178 // This method is also called from the modular system APIs in modules.cpp
5179 // to verify the validity of module and package names.
5180 bool ClassFileParser::verify_unqualified_name(const char* name,
5181 unsigned int length,
5182 int type) {
5183 for (const char* p = name; p != name + length;) {
5184 jchar ch = *p;
5185 if (ch < 128) {
5186 if (ch == '.' || ch == ';' || ch == '[' ) {
5187 return false; // do not permit '.', ';', or '['
5188 }
5189 if (ch == '/') {
5190 // check for '//' or leading or trailing '/' which are not legal
5191 // unqualified name must not be empty
5192 if (type == ClassFileParser::LegalClass) {
5193 if (p == name || p+1 >= name+length || *(p+1) == '/') {
5194 return false;
5195 }
5196 } else {
5197 return false; // do not permit '/' unless it's class name
5198 }
5199 }
5200 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
5201 return false; // do not permit '<' or '>' in method names
5202 }
5203 p++;
5204 } else {
5205 char* tmp_p = UTF8::next(p, &ch);
5206 p = tmp_p;
5207 }
5208 }
5209 return true;
5210 }
5211
5212 // Take pointer to a string. Skip over the longest part of the string that could
5213 // be taken as a fieldname. Allow '/' if slash_ok is true.
5214 // Return a pointer to just past the fieldname.
5215 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5216 // being true, we saw consecutive slashes (meaning we were looking for a
5217 // qualified path but found something that was badly-formed).
5218 static const char* skip_over_field_name(const char* name,
5219 bool slash_ok,
5220 unsigned int length) {
5221 const char* p;
5222 jboolean last_is_slash = false;
5223 jboolean not_first_ch = false;
5224
5225 for (p = name; p != name + length; not_first_ch = true) {
5226 const char* old_p = p;
5227 jchar ch = *p;
5228 if (ch < 128) {
5229 p++;
5230 // quick check for ascii
5231 if ((ch >= 'a' && ch <= 'z') ||
5232 (ch >= 'A' && ch <= 'Z') ||
5233 (ch == '_' || ch == '$') ||
5234 (not_first_ch && ch >= '0' && ch <= '9')) {
5235 last_is_slash = false;
5236 continue;
5237 }
5238 if (slash_ok && ch == '/') {
5239 if (last_is_slash) {
5240 return NULL; // Don't permit consecutive slashes
5241 }
5242 last_is_slash = true;
5243 continue;
5244 }
5245 }
5246 else {
5247 jint unicode_ch;
5248 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5249 p = tmp_p;
5250 last_is_slash = false;
5251 // Check if ch is Java identifier start or is Java identifier part
5252 // 4672820: call java.lang.Character methods directly without generating separate tables.
5253 EXCEPTION_MARK;
5254
5255 // return value
5256 JavaValue result(T_BOOLEAN);
5257 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
5258 JavaCallArguments args;
5259 args.push_int(unicode_ch);
5260
5261 // public static boolean isJavaIdentifierStart(char ch);
5262 JavaCalls::call_static(&result,
5263 SystemDictionary::Character_klass(),
5264 vmSymbols::isJavaIdentifierStart_name(),
5265 vmSymbols::int_bool_signature(),
5266 &args,
5267 THREAD);
5268
5269 if (HAS_PENDING_EXCEPTION) {
5270 CLEAR_PENDING_EXCEPTION;
5271 return 0;
5272 }
5273 if (result.get_jboolean()) {
5274 continue;
5275 }
5276
5277 if (not_first_ch) {
5278 // public static boolean isJavaIdentifierPart(char ch);
5279 JavaCalls::call_static(&result,
5280 SystemDictionary::Character_klass(),
5281 vmSymbols::isJavaIdentifierPart_name(),
5282 vmSymbols::int_bool_signature(),
5283 &args,
5284 THREAD);
5285
5286 if (HAS_PENDING_EXCEPTION) {
5287 CLEAR_PENDING_EXCEPTION;
5288 return 0;
5289 }
5290
5291 if (result.get_jboolean()) {
5292 continue;
5293 }
5294 }
5295 }
5296 return (not_first_ch) ? old_p : NULL;
5297 }
5298 return (not_first_ch) ? p : NULL;
5299 }
5300
5301 // Take pointer to a string. Skip over the longest part of the string that could
5302 // be taken as a field signature. Allow "void" if void_ok.
5303 // Return a pointer to just past the signature.
5304 // Return NULL if no legal signature is found.
5305 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5306 bool void_ok,
5307 unsigned int length,
5308 TRAPS) const {
5309 unsigned int array_dim = 0;
5310 while (length > 0) {
5311 switch (signature[0]) {
5312 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5313 case JVM_SIGNATURE_BOOLEAN:
5314 case JVM_SIGNATURE_BYTE:
5315 case JVM_SIGNATURE_CHAR:
5316 case JVM_SIGNATURE_SHORT:
5317 case JVM_SIGNATURE_INT:
5318 case JVM_SIGNATURE_FLOAT:
5319 case JVM_SIGNATURE_LONG:
5320 case JVM_SIGNATURE_DOUBLE:
5321 return signature + 1;
5322 case JVM_SIGNATURE_CLASS:
5323 {
5324 if (_major_version < JAVA_1_5_VERSION) {
5325 // Skip over the class name if one is there
5326 const char* const p = skip_over_field_name(signature + 1, true, --length);
5327
5328 // The next character better be a semicolon
5329 if (p && (p - signature) > 1 && p[0] == ';') {
5330 return p + 1;
5331 }
5332 }
5333 else {
5334 // Skip leading 'L' and ignore first appearance of ';'
5335 length--;
5336 signature++;
5337 char* c = strchr((char*) signature, ';');
5338 // Format check signature
5339 if (c != NULL) {
5340 ResourceMark rm(THREAD);
5341 int newlen = c - (char*) signature;
5342 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
5343 strncpy(sig, signature, newlen);
5344 sig[newlen] = '\0';
5345
5346 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
5347 if (!legal) {
5348 classfile_parse_error("Class name contains illegal character "
5349 "in descriptor in class file %s",
5350 CHECK_0);
5351 return NULL;
5352 }
5353 return signature + newlen + 1;
5354 }
5355 }
5356 return NULL;
5357 }
5358 case JVM_SIGNATURE_ARRAY:
5359 array_dim++;
5360 if (array_dim > 255) {
5361 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5362 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5363 }
5364 // The rest of what's there better be a legal signature
5365 signature++;
5366 length--;
5367 void_ok = false;
5368 break;
5369 default:
5370 return NULL;
5371 }
5372 }
5373 return NULL;
5374 }
5375
5376 // Checks if name is a legal class name.
5377 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5378 if (!_need_verify || _relax_verify) { return; }
5379
5380 char buf[fixed_buffer_size];
5381 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5382 unsigned int length = name->utf8_length();
5383 bool legal = false;
5384
5385 if (length > 0) {
5386 const char* p;
5387 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5388 p = skip_over_field_signature(bytes, false, length, CHECK);
5389 legal = (p != NULL) && ((p - bytes) == (int)length);
5390 } else if (_major_version < JAVA_1_5_VERSION) {
5391 if (bytes[0] != '<') {
5392 p = skip_over_field_name(bytes, true, length);
5393 legal = (p != NULL) && ((p - bytes) == (int)length);
5394 }
5395 } else {
5396 // 4900761: relax the constraints based on JSR202 spec
5397 // Class names may be drawn from the entire Unicode character set.
5398 // Identifiers between '/' must be unqualified names.
5399 // The utf8 string has been verified when parsing cpool entries.
5400 legal = verify_unqualified_name(bytes, length, LegalClass);
5401 }
5402 }
5403 if (!legal) {
5404 ResourceMark rm(THREAD);
5405 assert(_class_name != NULL, "invariant");
5406 Exceptions::fthrow(
5407 THREAD_AND_LOCATION,
5408 vmSymbols::java_lang_ClassFormatError(),
5409 "Illegal class name \"%s\" in class file %s", bytes,
5410 _class_name->as_C_string()
5411 );
5412 return;
5413 }
5414 }
5415
5416 // Checks if name is a legal field name.
5417 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5418 if (!_need_verify || _relax_verify) { return; }
5419
5420 char buf[fixed_buffer_size];
5421 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5422 unsigned int length = name->utf8_length();
5423 bool legal = false;
5424
5425 if (length > 0) {
5426 if (_major_version < JAVA_1_5_VERSION) {
5427 if (bytes[0] != '<') {
5428 const char* p = skip_over_field_name(bytes, false, length);
5429 legal = (p != NULL) && ((p - bytes) == (int)length);
5430 }
5431 } else {
5432 // 4881221: relax the constraints based on JSR202 spec
5433 legal = verify_unqualified_name(bytes, length, LegalField);
5434 }
5435 }
5436
5437 if (!legal) {
5438 ResourceMark rm(THREAD);
5439 assert(_class_name != NULL, "invariant");
5440 Exceptions::fthrow(
5441 THREAD_AND_LOCATION,
5442 vmSymbols::java_lang_ClassFormatError(),
5443 "Illegal field name \"%s\" in class %s", bytes,
5444 _class_name->as_C_string()
5445 );
5446 return;
5447 }
5448 }
5449
5450 // Checks if name is a legal method name.
5451 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5452 if (!_need_verify || _relax_verify) { return; }
5453
5454 assert(name != NULL, "method name is null");
5455 char buf[fixed_buffer_size];
5456 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5457 unsigned int length = name->utf8_length();
5458 bool legal = false;
5459
5460 if (length > 0) {
5461 if (bytes[0] == '<') {
5462 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5463 legal = true;
5464 }
5465 } else if (_major_version < JAVA_1_5_VERSION) {
5466 const char* p;
5467 p = skip_over_field_name(bytes, false, length);
5468 legal = (p != NULL) && ((p - bytes) == (int)length);
5469 } else {
5470 // 4881221: relax the constraints based on JSR202 spec
5471 legal = verify_unqualified_name(bytes, length, LegalMethod);
5472 }
5473 }
5474
5475 if (!legal) {
5476 ResourceMark rm(THREAD);
5477 assert(_class_name != NULL, "invariant");
5478 Exceptions::fthrow(
5479 THREAD_AND_LOCATION,
5480 vmSymbols::java_lang_ClassFormatError(),
5481 "Illegal method name \"%s\" in class %s", bytes,
5482 _class_name->as_C_string()
5483 );
5484 return;
5485 }
5486 }
5487
5488
5489 // Checks if signature is a legal field signature.
5490 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5491 const Symbol* signature,
5492 TRAPS) const {
5493 if (!_need_verify) { return; }
5494
5495 char buf[fixed_buffer_size];
5496 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5497 const unsigned int length = signature->utf8_length();
5498 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5499
5500 if (p == NULL || (p - bytes) != (int)length) {
5501 throwIllegalSignature("Field", name, signature, CHECK);
5502 }
5503 }
5504
5505 // Checks if signature is a legal method signature.
5506 // Returns number of parameters
5507 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5508 const Symbol* signature,
5509 TRAPS) const {
5510 if (!_need_verify) {
5511 // make sure caller's args_size will be less than 0 even for non-static
5512 // method so it will be recomputed in compute_size_of_parameters().
5513 return -2;
5514 }
5515
5516 // Class initializers cannot have args for class format version >= 51.
5517 if (name == vmSymbols::class_initializer_name() &&
5518 signature != vmSymbols::void_method_signature() &&
5519 _major_version >= JAVA_7_VERSION) {
5520 throwIllegalSignature("Method", name, signature, CHECK_0);
5521 return 0;
5522 }
5523
5524 unsigned int args_size = 0;
5525 char buf[fixed_buffer_size];
5526 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5527 unsigned int length = signature->utf8_length();
5528 const char* nextp;
5529
5530 // The first character must be a '('
5531 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5532 length--;
5533 // Skip over legal field signatures
5534 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5535 while ((length > 0) && (nextp != NULL)) {
5536 args_size++;
5537 if (p[0] == 'J' || p[0] == 'D') {
5538 args_size++;
5539 }
5540 length -= nextp - p;
5541 p = nextp;
5542 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5543 }
5544 // The first non-signature thing better be a ')'
5545 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5546 length--;
5547 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5548 // All internal methods must return void
5549 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5550 return args_size;
5551 }
5552 } else {
5553 // Now we better just have a return value
5554 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5555 if (nextp && ((int)length == (nextp - p))) {
5556 return args_size;
5557 }
5558 }
5559 }
5560 }
5561 // Report error
5562 throwIllegalSignature("Method", name, signature, CHECK_0);
5563 return 0;
5564 }
5565
5566 int ClassFileParser::static_field_size() const {
5567 assert(_field_info != NULL, "invariant");
5568 return _field_info->static_field_size;
5569 }
5570
5571 int ClassFileParser::total_oop_map_count() const {
5572 assert(_field_info != NULL, "invariant");
5573 return _field_info->oop_map_blocks->nonstatic_oop_map_count;
5574 }
5575
5576 jint ClassFileParser::layout_size() const {
5577 assert(_field_info != NULL, "invariant");
5578 return _field_info->instance_size;
5579 }
5580
5581 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5582 const Array<Method*>* methods) {
5583 assert(ik != NULL, "invariant");
5584 assert(methods != NULL, "invariant");
5585
5586 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5587 // (We used to do this lazily, but now we query it in Rewriter,
5588 // which is eagerly done for every method, so we might as well do it now,
5589 // when everything is fresh in memory.)
5590 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5591
5592 if (klass_id != vmSymbols::NO_SID) {
5593 for (int j = 0; j < methods->length(); ++j) {
5594 Method* method = methods->at(j);
5595 method->init_intrinsic_id();
5596
5597 if (CheckIntrinsics) {
5598 // Check if an intrinsic is defined for method 'method',
5599 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5600 if (method->intrinsic_id() != vmIntrinsics::_none &&
5601 !method->intrinsic_candidate()) {
5602 tty->print("Compiler intrinsic is defined for method [%s], "
5603 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5604 method->name_and_sig_as_C_string(),
5605 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5606 );
5607 tty->cr();
5608 DEBUG_ONLY(vm_exit(1));
5609 }
5610 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5611 // but there is no intrinsic available for it.
5612 if (method->intrinsic_candidate() &&
5613 method->intrinsic_id() == vmIntrinsics::_none) {
5614 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5615 "but no compiler intrinsic is defined for the method.%s",
5616 method->name_and_sig_as_C_string(),
5617 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5618 );
5619 tty->cr();
5620 DEBUG_ONLY(vm_exit(1));
5621 }
5622 }
5623 } // end for
5624
5625 #ifdef ASSERT
5626 if (CheckIntrinsics) {
5627 // Check for orphan methods in the current class. A method m
5628 // of a class C is orphan if an intrinsic is defined for method m,
5629 // but class C does not declare m.
5630 // The check is potentially expensive, therefore it is available
5631 // only in debug builds.
5632
5633 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5634 if (vmIntrinsics::_compiledLambdaForm == id) {
5635 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5636 // generated for the JVM from a LambdaForm and therefore no method
5637 // is defined for it.
5638 continue;
5639 }
5640
5641 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5642 // Check if the current class contains a method with the same
5643 // name, flags, signature.
5644 bool match = false;
5645 for (int j = 0; j < methods->length(); ++j) {
5646 const Method* method = methods->at(j);
5647 if (method->intrinsic_id() == id) {
5648 match = true;
5649 break;
5650 }
5651 }
5652
5653 if (!match) {
5654 char buf[1000];
5655 tty->print("Compiler intrinsic is defined for method [%s], "
5656 "but the method is not available in class [%s].%s",
5657 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5658 buf, sizeof(buf)),
5659 ik->name()->as_C_string(),
5660 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5661 );
5662 tty->cr();
5663 DEBUG_ONLY(vm_exit(1));
5664 }
5665 }
5666 } // end for
5667 } // CheckIntrinsics
5668 #endif // ASSERT
5669 }
5670 }
5671
5672 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5673 if (_klass != NULL) {
5674 return _klass;
5675 }
5676
5677 InstanceKlass* const ik =
5678 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5679
5680 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5681
5682 assert(_klass == ik, "invariant");
5683
5684 ik->set_has_passed_fingerprint_check(false);
5685 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5686 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5687 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5688 // This class matches with a class saved in an AOT library
5689 ik->set_has_passed_fingerprint_check(true);
5690 } else {
5691 ResourceMark rm;
5692 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5693 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5694 }
5695 }
5696
5697 if (ik->is_value()) {
5698 ValueKlass* vk = ValueKlass::cast(ik);
5699 oop val = ik->allocate_instance(CHECK_NULL);
5700 vk->set_default_value(val);
5701 }
5702
5703 return ik;
5704 }
5705
5706 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5707 assert(ik != NULL, "invariant");
5708
5709 set_klass_to_deallocate(ik);
5710
5711 assert(_field_info != NULL, "invariant");
5712 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5713 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->nonstatic_oop_map_count,
5714 "sanity");
5715
5716 assert(ik->is_instance_klass(), "sanity");
5717 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5718
5719 // Fill in information already parsed
5720 ik->set_should_verify_class(_need_verify);
5721
5722 // Not yet: supers are done below to support the new subtype-checking fields
5723 ik->set_class_loader_data(_loader_data);
5724 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5725 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5726 assert(_fac != NULL, "invariant");
5727 ik->set_static_oop_field_count(_fac->count[STATIC_OOP] + _fac->count[STATIC_FLATTENABLE]);
5728
5729 // this transfers ownership of a lot of arrays from
5730 // the parser onto the InstanceKlass*
5731 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5732
5733 // note that is not safe to use the fields in the parser from this point on
5734 assert(NULL == _cp, "invariant");
5735 assert(NULL == _fields, "invariant");
5736 assert(NULL == _methods, "invariant");
5737 assert(NULL == _inner_classes, "invariant");
5738 assert(NULL == _local_interfaces, "invariant");
5739 assert(NULL == _transitive_interfaces, "invariant");
5740 assert(NULL == _combined_annotations, "invariant");
5741
5742 if (_has_final_method) {
5743 ik->set_has_final_method();
5744 }
5745
5746 ik->copy_method_ordering(_method_ordering, CHECK);
5747 // The InstanceKlass::_methods_jmethod_ids cache
5748 // is managed on the assumption that the initial cache
5749 // size is equal to the number of methods in the class. If
5750 // that changes, then InstanceKlass::idnum_can_increment()
5751 // has to be changed accordingly.
5752 ik->set_initial_method_idnum(ik->methods()->length());
5753
5754 ik->set_name(_class_name);
5755
5756 if (is_anonymous()) {
5757 // _this_class_index is a CONSTANT_Class entry that refers to this
5758 // anonymous class itself. If this class needs to refer to its own methods or
5759 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5760 // _this_class_index. However, because this class is anonymous (it's
5761 // not stored in SystemDictionary), _this_class_index cannot be resolved
5762 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5763 // Therefore, we must eagerly resolve _this_class_index now.
5764 ik->constants()->klass_at_put(_this_class_index, ik);
5765 }
5766
5767 ik->set_minor_version(_minor_version);
5768 ik->set_major_version(_major_version);
5769 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5770 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5771
5772 if (_host_klass != NULL) {
5773 assert (ik->is_anonymous(), "should be the same");
5774 ik->set_host_klass(_host_klass);
5775 }
5776
5777 // Set PackageEntry for this_klass
5778 oop cl = ik->class_loader();
5779 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5780 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5781 ik->set_package(cld, CHECK);
5782
5783 const Array<Method*>* const methods = ik->methods();
5784 assert(methods != NULL, "invariant");
5785 const int methods_len = methods->length();
5786
5787 check_methods_for_intrinsics(ik, methods);
5788
5789 // Fill in field values obtained by parse_classfile_attributes
5790 if (_parsed_annotations->has_any_annotations()) {
5791 _parsed_annotations->apply_to(ik);
5792 }
5793
5794 apply_parsed_class_attributes(ik);
5795
5796 // Miranda methods
5797 if ((_num_miranda_methods > 0) ||
5798 // if this class introduced new miranda methods or
5799 (_super_klass != NULL && _super_klass->has_miranda_methods())
5800 // super class exists and this class inherited miranda methods
5801 ) {
5802 ik->set_has_miranda_methods(); // then set a flag
5803 }
5804
5805 // Fill in information needed to compute superclasses.
5806 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5807
5808 // Initialize itable offset tables
5809 klassItable::setup_itable_offset_table(ik);
5810
5811 // Compute transitive closure of interfaces this class implements
5812 // Do final class setup
5813 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5814 if (oop_map_blocks->nonstatic_oop_map_count > 0) {
5815 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5816 }
5817
5818 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5819 set_precomputed_flags(ik);
5820
5821 // check if this class can access its super class
5822 check_super_class_access(ik, CHECK);
5823
5824 // check if this class can access its superinterfaces
5825 check_super_interface_access(ik, CHECK);
5826
5827 // check if this class overrides any final method
5828 check_final_method_override(ik, CHECK);
5829
5830 // reject static interface methods prior to Java 8
5831 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5832 check_illegal_static_method(ik, CHECK);
5833 }
5834
5835 // Obtain this_klass' module entry
5836 ModuleEntry* module_entry = ik->module();
5837 assert(module_entry != NULL, "module_entry should always be set");
5838
5839 // Obtain java.lang.Module
5840 Handle module_handle(THREAD, module_entry->module());
5841
5842 // Allocate mirror and initialize static fields
5843 // The create_mirror() call will also call compute_modifiers()
5844 java_lang_Class::create_mirror(ik,
5845 Handle(THREAD, _loader_data->class_loader()),
5846 module_handle,
5847 _protection_domain,
5848 CHECK);
5849
5850 assert(_all_mirandas != NULL, "invariant");
5851
5852 // Generate any default methods - default methods are public interface methods
5853 // that have a default implementation. This is new with Java 8.
5854 if (_has_nonstatic_concrete_methods) {
5855 DefaultMethods::generate_default_methods(ik,
5856 _all_mirandas,
5857 CHECK);
5858 }
5859
5860 if (is_value_type()) {
5861 ValueKlass* vk = ValueKlass::cast(ik);
5862 vk->set_if_bufferable();
5863 vk->initialize_calling_convention();
5864 }
5865
5866 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5867 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5868 !module_entry->has_default_read_edges()) {
5869 if (!module_entry->set_has_default_read_edges()) {
5870 // We won a potential race
5871 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5872 }
5873 }
5874
5875 int nfields = ik->java_fields_count();
5876 if (ik->is_value()) nfields++;
5877 for(int i = 0; i < nfields; i++) {
5878 if (ik->field_access_flags(i) & JVM_ACC_FLATTENABLE) {
5879 Klass* klass = SystemDictionary::resolve_or_fail(ik->field_signature(i),
5880 Handle(THREAD, ik->class_loader()),
5881 Handle(THREAD, ik->protection_domain()), true, CHECK);
5882 assert(klass != NULL, "Sanity check");
5883 assert(klass->access_flags().is_value_type(), "Value type expected");
5884 ik->set_value_field_klass(i, klass);
5885 } else if (is_value_type() && ((ik->field_access_flags(i) & JVM_ACC_FIELD_INTERNAL) != 0)
5886 && ((ik->field_access_flags(i) & JVM_ACC_STATIC) != 0)) {
5887 ValueKlass::cast(ik)->set_default_value_offset(ik->field_offset(i));
5888 }
5889 }
5890
5891 // Update the loader_data graph.
5892 record_defined_class_dependencies(ik, CHECK);
5893
5894 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5895
5896 if (!is_internal()) {
5897 if (log_is_enabled(Info, class, load)) {
5898 ResourceMark rm;
5899 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5900 ik->print_class_load_logging(_loader_data, module_name, _stream);
5901 }
5902
5903 if (log_is_enabled(Debug, class, resolve)) {
5904 ResourceMark rm;
5905 // print out the superclass.
5906 const char * from = ik->external_name();
5907 if (ik->java_super() != NULL) {
5908 log_debug(class, resolve)("%s %s (super)",
5909 from,
5910 ik->java_super()->external_name());
5911 }
5912 // print out each of the interface classes referred to by this class.
5913 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5914 if (local_interfaces != NULL) {
5915 const int length = local_interfaces->length();
5916 for (int i = 0; i < length; i++) {
5917 const Klass* const k = local_interfaces->at(i);
5918 const char * to = k->external_name();
5919 log_debug(class, resolve)("%s %s (interface)", from, to);
5920 }
5921 }
5922 }
5923 }
5924
5925 TRACE_INIT_ID(ik);
5926
5927 // If we reach here, all is well.
5928 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5929 // in order for it to not be destroyed in the ClassFileParser destructor.
5930 set_klass_to_deallocate(NULL);
5931
5932 // it's official
5933 set_klass(ik);
5934
5935 debug_only(ik->verify();)
5936 }
5937
5938 // For an anonymous class that is in the unnamed package, move it to its host class's
5939 // package by prepending its host class's package name to its class name and setting
5940 // its _class_name field.
5941 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5942 ResourceMark rm(THREAD);
5943 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5944 "Anonymous class should not be in a package");
5945 const char* host_pkg_name =
5946 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5947
5948 if (host_pkg_name != NULL) {
5949 size_t host_pkg_len = strlen(host_pkg_name);
5950 int class_name_len = _class_name->utf8_length();
5951 char* new_anon_name =
5952 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5953 // Copy host package name and trailing /.
5954 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5955 new_anon_name[host_pkg_len] = '/';
5956 // Append anonymous class name. The anonymous class name can contain odd
5957 // characters. So, do a strncpy instead of using sprintf("%s...").
5958 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5959
5960 // Create a symbol and update the anonymous class name.
5961 _class_name = SymbolTable::new_symbol(new_anon_name,
5962 (int)host_pkg_len + 1 + class_name_len,
5963 CHECK);
5964 }
5965 }
5966
5967 // If the host class and the anonymous class are in the same package then do
5968 // nothing. If the anonymous class is in the unnamed package then move it to its
5969 // host's package. If the classes are in different packages then throw an IAE
5970 // exception.
5971 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5972 assert(_host_klass != NULL, "Expected an anonymous class");
5973
5974 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5975 _class_name->utf8_length(), '/');
5976 if (anon_last_slash == NULL) { // Unnamed package
5977 prepend_host_package_name(_host_klass, CHECK);
5978 } else {
5979 if (!_host_klass->is_same_class_package(_host_klass->class_loader(), _class_name)) {
5980 ResourceMark rm(THREAD);
5981 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5982 err_msg("Host class %s and anonymous class %s are in different packages",
5983 _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5984 }
5985 }
5986 }
5987
5988 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5989 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5990 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5991 bool need_verify =
5992 // verifyAll
5993 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5994 // verifyRemote
5995 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5996 return !need_verify;
5997 }
5998
5999 ClassFileParser::ClassFileParser(ClassFileStream* stream,
6000 Symbol* name,
6001 ClassLoaderData* loader_data,
6002 Handle protection_domain,
6003 const InstanceKlass* host_klass,
6004 GrowableArray<Handle>* cp_patches,
6005 Publicity pub_level,
6006 TRAPS) :
6007 _stream(stream),
6008 _requested_name(name),
6009 _loader_data(loader_data),
6010 _host_klass(host_klass),
6011 _cp_patches(cp_patches),
6012 _num_patched_klasses(0),
6013 _max_num_patched_klasses(0),
6014 _orig_cp_size(0),
6015 _first_patched_klass_resolved_index(0),
6016 _super_klass(),
6017 _cp(NULL),
6018 _fields(NULL),
6019 _methods(NULL),
6020 _inner_classes(NULL),
6021 _value_types(NULL),
6022 _local_interfaces(NULL),
6023 _transitive_interfaces(NULL),
6024 _combined_annotations(NULL),
6025 _annotations(NULL),
6026 _type_annotations(NULL),
6027 _fields_annotations(NULL),
6028 _fields_type_annotations(NULL),
6029 _klass(NULL),
6030 _klass_to_deallocate(NULL),
6031 _parsed_annotations(NULL),
6032 _fac(NULL),
6033 _field_info(NULL),
6034 _method_ordering(NULL),
6035 _all_mirandas(NULL),
6036 _vtable_size(0),
6037 _itable_size(0),
6038 _num_miranda_methods(0),
6039 _rt(REF_NONE),
6040 _protection_domain(protection_domain),
6041 _access_flags(),
6042 _pub_level(pub_level),
6043 _bad_constant_seen(0),
6044 _synthetic_flag(false),
6045 _sde_length(false),
6046 _sde_buffer(NULL),
6047 _sourcefile_index(0),
6048 _generic_signature_index(0),
6049 _major_version(0),
6050 _minor_version(0),
6051 _this_class_index(0),
6052 _super_class_index(0),
6053 _itfs_len(0),
6054 _java_fields_count(0),
6055 _need_verify(false),
6056 _relax_verify(false),
6057 _has_nonstatic_concrete_methods(false),
6058 _declares_nonstatic_concrete_methods(false),
6059 _has_final_method(false),
6060 _has_finalizer(false),
6061 _has_empty_finalizer(false),
6062 _has_vanilla_constructor(false),
6063 _max_bootstrap_specifier_index(-1),
6064 _has_flattenable_fields(false) {
6065
6066 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
6067
6068 assert(THREAD->is_Java_thread(), "invariant");
6069 assert(_loader_data != NULL, "invariant");
6070 assert(stream != NULL, "invariant");
6071 assert(_stream != NULL, "invariant");
6072 assert(_stream->buffer() == _stream->current(), "invariant");
6073 assert(_class_name != NULL, "invariant");
6074 assert(0 == _access_flags.as_int(), "invariant");
6075
6076 // Figure out whether we can skip format checking (matching classic VM behavior)
6077 if (DumpSharedSpaces) {
6078 // verify == true means it's a 'remote' class (i.e., non-boot class)
6079 // Verification decision is based on BytecodeVerificationRemote flag
6080 // for those classes.
6081 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
6082 BytecodeVerificationLocal;
6083 }
6084 else {
6085 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
6086 stream->need_verify());
6087 }
6088 if (_cp_patches != NULL) {
6089 int len = _cp_patches->length();
6090 for (int i=0; i<len; i++) {
6091 if (has_cp_patch_at(i)) {
6092 Handle patch = cp_patch_at(i);
6093 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
6094 // We need to append the names of the patched classes to the end of the constant pool,
6095 // because a patched class may have a Utf8 name that's not already included in the
6096 // original constant pool. These class names are used when patch_constant_pool()
6097 // calls patch_class().
6098 //
6099 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
6100 // At this point, we don't know the tag for index i yet, because we haven't parsed the
6101 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
6102 _max_num_patched_klasses++;
6103 }
6104 }
6105 }
6106 }
6107
6108 // synch back verification state to stream
6109 stream->set_verify(_need_verify);
6110
6111 // Check if verification needs to be relaxed for this class file
6112 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
6113 _relax_verify = relax_format_check_for(_loader_data);
6114
6115 parse_stream(stream, CHECK);
6116
6117 post_process_parsed_stream(stream, _cp, CHECK);
6118 }
6119
6120 void ClassFileParser::clear_class_metadata() {
6121 // metadata created before the instance klass is created. Must be
6122 // deallocated if classfile parsing returns an error.
6123 _cp = NULL;
6124 _fields = NULL;
6125 _methods = NULL;
6126 _inner_classes = NULL;
6127 _local_interfaces = NULL;
6128 _transitive_interfaces = NULL;
6129 _combined_annotations = NULL;
6130 _annotations = _type_annotations = NULL;
6131 _fields_annotations = _fields_type_annotations = NULL;
6132 }
6133
6134 // Destructor to clean up
6135 ClassFileParser::~ClassFileParser() {
6136 if (_cp != NULL) {
6137 MetadataFactory::free_metadata(_loader_data, _cp);
6138 }
6139 if (_fields != NULL) {
6140 MetadataFactory::free_array<u2>(_loader_data, _fields);
6141 }
6142
6143 if (_methods != NULL) {
6144 // Free methods
6145 InstanceKlass::deallocate_methods(_loader_data, _methods);
6146 }
6147
6148 // beware of the Universe::empty_blah_array!!
6149 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
6150 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
6151 }
6152
6153 // Free interfaces
6154 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
6155 _local_interfaces, _transitive_interfaces);
6156
6157 if (_combined_annotations != NULL) {
6158 // After all annotations arrays have been created, they are installed into the
6159 // Annotations object that will be assigned to the InstanceKlass being created.
6160
6161 // Deallocate the Annotations object and the installed annotations arrays.
6162 _combined_annotations->deallocate_contents(_loader_data);
6163
6164 // If the _combined_annotations pointer is non-NULL,
6165 // then the other annotations fields should have been cleared.
6166 assert(_annotations == NULL, "Should have been cleared");
6167 assert(_type_annotations == NULL, "Should have been cleared");
6168 assert(_fields_annotations == NULL, "Should have been cleared");
6169 assert(_fields_type_annotations == NULL, "Should have been cleared");
6170 } else {
6171 // If the annotations arrays were not installed into the Annotations object,
6172 // then they have to be deallocated explicitly.
6173 MetadataFactory::free_array<u1>(_loader_data, _annotations);
6174 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
6175 Annotations::free_contents(_loader_data, _fields_annotations);
6176 Annotations::free_contents(_loader_data, _fields_type_annotations);
6177 }
6178
6179 clear_class_metadata();
6180
6181 // deallocate the klass if already created. Don't directly deallocate, but add
6182 // to the deallocate list so that the klass is removed from the CLD::_klasses list
6183 // at a safepoint.
6184 if (_klass_to_deallocate != NULL) {
6185 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6186 }
6187 }
6188
6189 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6190 TRAPS) {
6191
6192 assert(stream != NULL, "invariant");
6193 assert(_class_name != NULL, "invariant");
6194
6195 // BEGIN STREAM PARSING
6196 stream->guarantee_more(8, CHECK); // magic, major, minor
6197 // Magic value
6198 const u4 magic = stream->get_u4_fast();
6199 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6200 "Incompatible magic value %u in class file %s",
6201 magic, CHECK);
6202
6203 // Version numbers
6204 _minor_version = stream->get_u2_fast();
6205 _major_version = stream->get_u2_fast();
6206
6207 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
6208 ResourceMark rm;
6209 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
6210 _major_version, _minor_version, _class_name->as_C_string());
6211 Exceptions::fthrow(
6212 THREAD_AND_LOCATION,
6213 vmSymbols::java_lang_UnsupportedClassVersionError(),
6214 "Unsupported major.minor version for dump time %u.%u",
6215 _major_version,
6216 _minor_version);
6217 }
6218
6219 // Check version numbers - we check this even with verifier off
6220 if (!is_supported_version(_major_version, _minor_version)) {
6221 ResourceMark rm(THREAD);
6222 Exceptions::fthrow(
6223 THREAD_AND_LOCATION,
6224 vmSymbols::java_lang_UnsupportedClassVersionError(),
6225 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
6226 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
6227 _class_name->as_C_string(),
6228 _major_version,
6229 _minor_version,
6230 JVM_CLASSFILE_MAJOR_VERSION,
6231 JVM_CLASSFILE_MINOR_VERSION);
6232 return;
6233 }
6234
6235 stream->guarantee_more(3, CHECK); // length, first cp tag
6236 u2 cp_size = stream->get_u2_fast();
6237
6238 guarantee_property(
6239 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6240 cp_size, CHECK);
6241
6242 _orig_cp_size = cp_size;
6243 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6244 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6245 }
6246 cp_size += _max_num_patched_klasses;
6247
6248 _cp = ConstantPool::allocate(_loader_data,
6249 cp_size,
6250 CHECK);
6251
6252 ConstantPool* const cp = _cp;
6253
6254 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6255
6256 assert(cp_size == (const u2)cp->length(), "invariant");
6257
6258 // ACCESS FLAGS
6259 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6260
6261 jint recognized_modifiers = JVM_RECOGNIZED_CLASS_MODIFIERS;
6262 // JVM_ACC_MODULE is defined in JDK-9 and later.
6263 if (_major_version >= JAVA_9_VERSION) {
6264 recognized_modifiers |= JVM_ACC_MODULE;
6265 }
6266 // JVM_ACC_VALUE is defined for class file version 55 and later
6267 if (supports_value_types()) {
6268 recognized_modifiers |= JVM_ACC_VALUE;
6269 }
6270
6271 // Access flags
6272 jint flags = stream->get_u2_fast() & recognized_modifiers;
6273
6274 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6275 // Set abstract bit for old class files for backward compatibility
6276 flags |= JVM_ACC_ABSTRACT;
6277 }
6278
6279 verify_legal_class_modifiers(flags, CHECK);
6280
6281 short bad_constant = class_bad_constant_seen();
6282 if (bad_constant != 0) {
6283 // Do not throw CFE until after the access_flags are checked because if
6284 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6285 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6286 }
6287
6288 _access_flags.set_flags(flags);
6289
6290 // This class and superclass
6291 _this_class_index = stream->get_u2_fast();
6292 check_property(
6293 valid_cp_range(_this_class_index, cp_size) &&
6294 cp->tag_at(_this_class_index).is_unresolved_klass(),
6295 "Invalid this class index %u in constant pool in class file %s",
6296 _this_class_index, CHECK);
6297
6298 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6299 assert(class_name_in_cp != NULL, "class_name can't be null");
6300
6301 // Update _class_name which could be null previously
6302 // to reflect the name in the constant pool
6303 _class_name = class_name_in_cp;
6304
6305 // Don't need to check whether this class name is legal or not.
6306 // It has been checked when constant pool is parsed.
6307 // However, make sure it is not an array type.
6308 if (_need_verify) {
6309 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
6310 "Bad class name in class file %s",
6311 CHECK);
6312 }
6313
6314 // Checks if name in class file matches requested name
6315 if (_requested_name != NULL && _requested_name != _class_name) {
6316 ResourceMark rm(THREAD);
6317 Exceptions::fthrow(
6318 THREAD_AND_LOCATION,
6319 vmSymbols::java_lang_NoClassDefFoundError(),
6320 "%s (wrong name: %s)",
6321 _class_name->as_C_string(),
6322 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6323 );
6324 return;
6325 }
6326
6327 // if this is an anonymous class fix up its name if it's in the unnamed
6328 // package. Otherwise, throw IAE if it is in a different package than
6329 // its host class.
6330 if (_host_klass != NULL) {
6331 fix_anonymous_class_name(CHECK);
6332 }
6333
6334 // Verification prevents us from creating names with dots in them, this
6335 // asserts that that's the case.
6336 assert(is_internal_format(_class_name), "external class name format used internally");
6337
6338 if (!is_internal()) {
6339 LogTarget(Debug, class, preorder) lt;
6340 if (lt.is_enabled()){
6341 ResourceMark rm(THREAD);
6342 LogStream ls(lt);
6343 ls.print("%s", _class_name->as_klass_external_name());
6344 if (stream->source() != NULL) {
6345 ls.print(" source: %s", stream->source());
6346 }
6347 ls.cr();
6348 }
6349
6350 #if INCLUDE_CDS
6351 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6352 if (!ClassLoader::has_jrt_entry()) {
6353 warning("DumpLoadedClassList and CDS are not supported in exploded build");
6354 DumpLoadedClassList = NULL;
6355 } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6356 _host_klass == NULL) {
6357 // Only dump the classes that can be stored into CDS archive.
6358 // Anonymous classes such as generated LambdaForm classes are also not included.
6359 oop class_loader = _loader_data->class_loader();
6360 ResourceMark rm(THREAD);
6361 bool skip = false;
6362 if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6363 // For the boot and platform class loaders, skip classes that are not found in the
6364 // java runtime image, such as those found in the --patch-module entries.
6365 // These classes can't be loaded from the archive during runtime.
6366 if (!ClassLoader::is_modules_image(stream->source()) && strncmp(stream->source(), "jrt:", 4) != 0) {
6367 skip = true;
6368 }
6369
6370 if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6371 // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6372 // as they can be loaded from the archive during runtime.
6373 skip = false;
6374 }
6375 }
6376 if (skip) {
6377 tty->print_cr("skip writing class %s from source %s to classlist file",
6378 _class_name->as_C_string(), stream->source());
6379 } else {
6380 classlist_file->print_cr("%s", _class_name->as_C_string());
6381 classlist_file->flush();
6382 }
6383 }
6384 }
6385 #endif
6386 }
6387
6388 // SUPERKLASS
6389 _super_class_index = stream->get_u2_fast();
6390 _super_klass = parse_super_class(cp,
6391 _super_class_index,
6392 _need_verify,
6393 CHECK);
6394
6395 // Interfaces
6396 _itfs_len = stream->get_u2_fast();
6397 parse_interfaces(stream,
6398 _itfs_len,
6399 cp,
6400 &_has_nonstatic_concrete_methods,
6401 CHECK);
6402
6403 assert(_local_interfaces != NULL, "invariant");
6404
6405 // Fields (offsets are filled in later)
6406 _fac = new FieldAllocationCount();
6407 parse_fields(stream,
6408 _access_flags.is_interface(),
6409 _access_flags.is_value_type(),
6410 _fac,
6411 cp,
6412 cp_size,
6413 &_java_fields_count,
6414 CHECK);
6415
6416 assert(_fields != NULL, "invariant");
6417
6418 // Methods
6419 AccessFlags promoted_flags;
6420 parse_methods(stream,
6421 _access_flags.is_interface(),
6422 _access_flags.is_value_type(),
6423 &promoted_flags,
6424 &_has_final_method,
6425 &_declares_nonstatic_concrete_methods,
6426 CHECK);
6427
6428 assert(_methods != NULL, "invariant");
6429
6430 // promote flags from parse_methods() to the klass' flags
6431 _access_flags.add_promoted_flags(promoted_flags.as_int());
6432
6433 if (_declares_nonstatic_concrete_methods) {
6434 _has_nonstatic_concrete_methods = true;
6435 }
6436
6437 // Additional attributes/annotations
6438 _parsed_annotations = new ClassAnnotationCollector();
6439 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6440
6441 assert(_inner_classes != NULL, "invariant");
6442
6443 // Finalize the Annotations metadata object,
6444 // now that all annotation arrays have been created.
6445 create_combined_annotations(CHECK);
6446
6447 // Make sure this is the end of class file stream
6448 guarantee_property(stream->at_eos(),
6449 "Extra bytes at the end of class file %s",
6450 CHECK);
6451
6452 // all bytes in stream read and parsed
6453 }
6454
6455 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6456 ConstantPool* cp,
6457 TRAPS) {
6458 assert(stream != NULL, "invariant");
6459 assert(stream->at_eos(), "invariant");
6460 assert(cp != NULL, "invariant");
6461 assert(_loader_data != NULL, "invariant");
6462
6463 if (_class_name == vmSymbols::java_lang_Object()) {
6464 check_property(_local_interfaces == Universe::the_empty_klass_array(),
6465 "java.lang.Object cannot implement an interface in class file %s",
6466 CHECK);
6467 }
6468 // We check super class after class file is parsed and format is checked
6469 if (_super_class_index > 0 && NULL ==_super_klass) {
6470 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6471 if (_access_flags.is_interface()) {
6472 // Before attempting to resolve the superclass, check for class format
6473 // errors not checked yet.
6474 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6475 "Interfaces must have java.lang.Object as superclass in class file %s",
6476 CHECK);
6477 }
6478 Handle loader(THREAD, _loader_data->class_loader());
6479 _super_klass = (const InstanceKlass*)
6480 SystemDictionary::resolve_super_or_fail(_class_name,
6481 super_class_name,
6482 loader,
6483 _protection_domain,
6484 true,
6485 CHECK);
6486 }
6487
6488 if (_super_klass != NULL) {
6489 if (_super_klass->has_nonstatic_concrete_methods()) {
6490 _has_nonstatic_concrete_methods = true;
6491 }
6492
6493 if (_super_klass->is_interface()) {
6494 ResourceMark rm(THREAD);
6495 Exceptions::fthrow(
6496 THREAD_AND_LOCATION,
6497 vmSymbols::java_lang_IncompatibleClassChangeError(),
6498 "class %s has interface %s as super class",
6499 _class_name->as_klass_external_name(),
6500 _super_klass->external_name()
6501 );
6502 return;
6503 }
6504
6505 // For a value class, only java/lang/Object is an acceptable super class
6506 if (_access_flags.get_flags() & JVM_ACC_VALUE) {
6507 guarantee_property(_super_klass->name() == vmSymbols::java_lang_Object(),
6508 "Value type must have java.lang.Object as superclass in class file %s",
6509 CHECK);
6510 }
6511
6512 // Make sure super class is not final
6513 if (_super_klass->is_final()) {
6514 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6515 }
6516 }
6517
6518 // Compute the transitive list of all unique interfaces implemented by this class
6519 _transitive_interfaces =
6520 compute_transitive_interfaces(_super_klass,
6521 _local_interfaces,
6522 _loader_data,
6523 CHECK);
6524
6525 assert(_transitive_interfaces != NULL, "invariant");
6526
6527 // sort methods
6528 _method_ordering = sort_methods(_methods);
6529
6530 _all_mirandas = new GrowableArray<Method*>(20);
6531
6532 Handle loader(THREAD, _loader_data->class_loader());
6533 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6534 &_num_miranda_methods,
6535 _all_mirandas,
6536 _super_klass,
6537 _methods,
6538 _access_flags,
6539 _major_version,
6540 loader,
6541 _class_name,
6542 _local_interfaces,
6543 CHECK);
6544
6545 // Size of Java itable (in words)
6546 _itable_size = _access_flags.is_interface() ? 0 :
6547 klassItable::compute_itable_size(_transitive_interfaces);
6548
6549 assert(_fac != NULL, "invariant");
6550 assert(_parsed_annotations != NULL, "invariant");
6551
6552 _field_info = new FieldLayoutInfo();
6553 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6554
6555 // Compute reference typ
6556 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6557
6558 }
6559
6560 void ClassFileParser::set_klass(InstanceKlass* klass) {
6561
6562 #ifdef ASSERT
6563 if (klass != NULL) {
6564 assert(NULL == _klass, "leaking?");
6565 }
6566 #endif
6567
6568 _klass = klass;
6569 }
6570
6571 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6572
6573 #ifdef ASSERT
6574 if (klass != NULL) {
6575 assert(NULL == _klass_to_deallocate, "leaking?");
6576 }
6577 #endif
6578
6579 _klass_to_deallocate = klass;
6580 }
6581
6582 // Caller responsible for ResourceMark
6583 // clone stream with rewound position
6584 const ClassFileStream* ClassFileParser::clone_stream() const {
6585 assert(_stream != NULL, "invariant");
6586
6587 return _stream->clone();
6588 }
6589
6590 // ----------------------------------------------------------------------------
6591 // debugging
6592
6593 #ifdef ASSERT
6594
6595 // return true if class_name contains no '.' (internal format is '/')
6596 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6597 if (class_name != NULL) {
6598 ResourceMark rm;
6599 char* name = class_name->as_C_string();
6600 return strchr(name, '.') == NULL;
6601 } else {
6602 return true;
6603 }
6604 }
6605
6606 #endif