1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24 #include "precompiled.hpp"
25 #include "aot/aotLoader.hpp"
26 #include "classfile/classFileParser.hpp"
27 #include "classfile/classFileStream.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/defaultMethods.hpp"
31 #include "classfile/dictionary.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/moduleEntry.hpp"
34 #include "classfile/symbolTable.hpp"
35 #include "classfile/systemDictionary.hpp"
36 #include "classfile/verificationType.hpp"
37 #include "classfile/verifier.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "gc/shared/gcLocker.hpp"
40 #include "logging/log.hpp"
41 #include "memory/allocation.hpp"
42 #include "memory/metadataFactory.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "memory/universe.inline.hpp"
46 #include "oops/annotations.hpp"
47 #include "oops/fieldStreams.hpp"
48 #include "oops/instanceKlass.hpp"
49 #include "oops/instanceMirrorKlass.hpp"
50 #include "oops/klass.inline.hpp"
51 #include "oops/klassVtable.hpp"
52 #include "oops/metadata.hpp"
53 #include "oops/method.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "oops/symbol.hpp"
56 #include "prims/jvm.h"
57 #include "prims/jvmtiExport.hpp"
58 #include "prims/jvmtiThreadState.hpp"
59 #include "runtime/javaCalls.hpp"
60 #include "runtime/perfData.hpp"
61 #include "runtime/reflection.hpp"
62 #include "runtime/signature.hpp"
63 #include "runtime/timer.hpp"
64 #include "services/classLoadingService.hpp"
65 #include "services/threadService.hpp"
66 #include "trace/traceMacros.hpp"
67 #include "utilities/array.hpp"
68 #include "utilities/exceptions.hpp"
69 #include "utilities/globalDefinitions.hpp"
70 #include "utilities/macros.hpp"
71 #include "utilities/ostream.hpp"
72 #include "utilities/resourceHash.hpp"
73 #if INCLUDE_CDS
74 #include "classfile/systemDictionaryShared.hpp"
75 #endif
76
77 // We generally try to create the oops directly when parsing, rather than
78 // allocating temporary data structures and copying the bytes twice. A
79 // temporary area is only needed when parsing utf8 entries in the constant
80 // pool and when parsing line number tables.
81
82 // We add assert in debug mode when class format is not checked.
83
84 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
85 #define JAVA_MIN_SUPPORTED_VERSION 45
86 #define JAVA_MAX_SUPPORTED_VERSION 53
87 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
88
89 // Used for two backward compatibility reasons:
90 // - to check for new additions to the class file format in JDK1.5
91 // - to check for bug fixes in the format checker in JDK1.5
92 #define JAVA_1_5_VERSION 49
93
94 // Used for backward compatibility reasons:
95 // - to check for javac bug fixes that happened after 1.5
96 // - also used as the max version when running in jdk6
97 #define JAVA_6_VERSION 50
98
99 // Used for backward compatibility reasons:
100 // - to disallow argument and require ACC_STATIC for <clinit> methods
101 #define JAVA_7_VERSION 51
102
103 // Extension method support.
104 #define JAVA_8_VERSION 52
105
106 #define JAVA_9_VERSION 53
107
108 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
109 assert((bad_constant == 19 || bad_constant == 20) && _major_version >= JAVA_9_VERSION,
110 "Unexpected bad constant pool entry");
111 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
112 }
113
114 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
115 ConstantPool* cp,
116 const int length,
117 TRAPS) {
118 assert(stream != NULL, "invariant");
119 assert(cp != NULL, "invariant");
120
121 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
122 // this function (_current can be allocated in a register, with scalar
123 // replacement of aggregates). The _current pointer is copied back to
124 // stream() when this function returns. DON'T call another method within
125 // this method that uses stream().
126 const ClassFileStream cfs1 = *stream;
127 const ClassFileStream* const cfs = &cfs1;
128
129 assert(cfs->allocated_on_stack(), "should be local");
130 debug_only(const u1* const old_current = stream->current();)
131
132 // Used for batching symbol allocations.
133 const char* names[SymbolTable::symbol_alloc_batch_size];
134 int lengths[SymbolTable::symbol_alloc_batch_size];
135 int indices[SymbolTable::symbol_alloc_batch_size];
136 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
137 int names_count = 0;
138
139 // parsing Index 0 is unused
140 for (int index = 1; index < length; index++) {
141 // Each of the following case guarantees one more byte in the stream
142 // for the following tag or the access_flags following constant pool,
143 // so we don't need bounds-check for reading tag.
144 const u1 tag = cfs->get_u1_fast();
145 switch (tag) {
146 case JVM_CONSTANT_Class : {
147 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
148 const u2 name_index = cfs->get_u2_fast();
149 cp->klass_index_at_put(index, name_index);
150 break;
151 }
152 case JVM_CONSTANT_Fieldref: {
153 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
154 const u2 class_index = cfs->get_u2_fast();
155 const u2 name_and_type_index = cfs->get_u2_fast();
156 cp->field_at_put(index, class_index, name_and_type_index);
157 break;
158 }
159 case JVM_CONSTANT_Methodref: {
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->method_at_put(index, class_index, name_and_type_index);
164 break;
165 }
166 case JVM_CONSTANT_InterfaceMethodref: {
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->interface_method_at_put(index, class_index, name_and_type_index);
171 break;
172 }
173 case JVM_CONSTANT_String : {
174 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
175 const u2 string_index = cfs->get_u2_fast();
176 cp->string_index_at_put(index, string_index);
177 break;
178 }
179 case JVM_CONSTANT_MethodHandle :
180 case JVM_CONSTANT_MethodType: {
181 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
182 classfile_parse_error(
183 "Class file version does not support constant tag %u in class file %s",
184 tag, CHECK);
185 }
186 if (tag == JVM_CONSTANT_MethodHandle) {
187 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
188 const u1 ref_kind = cfs->get_u1_fast();
189 const u2 method_index = cfs->get_u2_fast();
190 cp->method_handle_index_at_put(index, ref_kind, method_index);
191 }
192 else if (tag == JVM_CONSTANT_MethodType) {
193 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
194 const u2 signature_index = cfs->get_u2_fast();
195 cp->method_type_index_at_put(index, signature_index);
196 }
197 else {
198 ShouldNotReachHere();
199 }
200 break;
201 }
202 case JVM_CONSTANT_InvokeDynamic : {
203 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
204 classfile_parse_error(
205 "Class file version does not support constant tag %u in class file %s",
206 tag, CHECK);
207 }
208 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
209 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
210 const u2 name_and_type_index = cfs->get_u2_fast();
211 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
212 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
213 }
214 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
215 break;
216 }
217 case JVM_CONSTANT_Integer: {
218 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
219 const u4 bytes = cfs->get_u4_fast();
220 cp->int_at_put(index, (jint)bytes);
221 break;
222 }
223 case JVM_CONSTANT_Float: {
224 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
225 const u4 bytes = cfs->get_u4_fast();
226 cp->float_at_put(index, *(jfloat*)&bytes);
227 break;
228 }
229 case JVM_CONSTANT_Long: {
230 // A mangled type might cause you to overrun allocated memory
231 guarantee_property(index + 1 < length,
232 "Invalid constant pool entry %u in class file %s",
233 index,
234 CHECK);
235 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
236 const u8 bytes = cfs->get_u8_fast();
237 cp->long_at_put(index, bytes);
238 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
239 break;
240 }
241 case JVM_CONSTANT_Double: {
242 // A mangled type might cause you to overrun allocated memory
243 guarantee_property(index+1 < length,
244 "Invalid constant pool entry %u in class file %s",
245 index,
246 CHECK);
247 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
248 const u8 bytes = cfs->get_u8_fast();
249 cp->double_at_put(index, *(jdouble*)&bytes);
250 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
251 break;
252 }
253 case JVM_CONSTANT_NameAndType: {
254 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
255 const u2 name_index = cfs->get_u2_fast();
256 const u2 signature_index = cfs->get_u2_fast();
257 cp->name_and_type_at_put(index, name_index, signature_index);
258 break;
259 }
260 case JVM_CONSTANT_Utf8 : {
261 cfs->guarantee_more(2, CHECK); // utf8_length
262 u2 utf8_length = cfs->get_u2_fast();
263 const u1* utf8_buffer = cfs->get_u1_buffer();
264 assert(utf8_buffer != NULL, "null utf8 buffer");
265 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
266 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
267 cfs->skip_u1_fast(utf8_length);
268
269 // Before storing the symbol, make sure it's legal
270 if (_need_verify) {
271 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
272 }
273
274 if (has_cp_patch_at(index)) {
275 Handle patch = clear_cp_patch_at(index);
276 guarantee_property(java_lang_String::is_instance(patch()),
277 "Illegal utf8 patch at %d in class file %s",
278 index,
279 CHECK);
280 const char* const str = java_lang_String::as_utf8_string(patch());
281 // (could use java_lang_String::as_symbol instead, but might as well batch them)
282 utf8_buffer = (const u1*) str;
283 utf8_length = (int) strlen(str);
284 }
285
286 unsigned int hash;
287 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
288 utf8_length,
289 hash);
290 if (result == NULL) {
291 names[names_count] = (const char*)utf8_buffer;
292 lengths[names_count] = utf8_length;
293 indices[names_count] = index;
294 hashValues[names_count++] = hash;
295 if (names_count == SymbolTable::symbol_alloc_batch_size) {
296 SymbolTable::new_symbols(_loader_data,
297 cp,
298 names_count,
299 names,
300 lengths,
301 indices,
302 hashValues,
303 CHECK);
304 names_count = 0;
305 }
306 } else {
307 cp->symbol_at_put(index, result);
308 }
309 break;
310 }
311 case 19:
312 case 20: {
313 // Record that an error occurred in these two cases but keep parsing so
314 // that ACC_Module can be checked for in the access_flags. Need to
315 // throw NoClassDefFoundError in that case.
316 if (_major_version >= JAVA_9_VERSION) {
317 cfs->guarantee_more(3, CHECK);
318 cfs->get_u2_fast();
319 set_class_bad_constant_seen(tag);
320 break;
321 }
322 }
323 default: {
324 classfile_parse_error("Unknown constant tag %u in class file %s",
325 tag,
326 CHECK);
327 break;
328 }
329 } // end of switch(tag)
330 } // end of for
331
332 // Allocate the remaining symbols
333 if (names_count > 0) {
334 SymbolTable::new_symbols(_loader_data,
335 cp,
336 names_count,
337 names,
338 lengths,
339 indices,
340 hashValues,
341 CHECK);
342 }
343
344 // Copy _current pointer of local copy back to stream.
345 assert(stream->current() == old_current, "non-exclusive use of stream");
346 stream->set_current(cfs1.current());
347
348 }
349
350 static inline bool valid_cp_range(int index, int length) {
351 return (index > 0 && index < length);
352 }
353
354 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
355 assert(cp != NULL, "invariant");
356 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
357 return cp->symbol_at(index);
358 }
359 return NULL;
360 }
361
362 #ifdef ASSERT
363 PRAGMA_DIAG_PUSH
364 PRAGMA_FORMAT_NONLITERAL_IGNORED
365 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
366 ResourceMark rm(THREAD);
367 fatal(msg, _class_name->as_C_string());
368 }
369
370 void ClassFileParser::report_assert_property_failure(const char* msg,
371 int index,
372 TRAPS) const {
373 ResourceMark rm(THREAD);
374 fatal(msg, index, _class_name->as_C_string());
375 }
376 PRAGMA_DIAG_POP
377 #endif
378
379 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
380 ConstantPool* const cp,
381 const int length,
382 TRAPS) {
383 assert(cp != NULL, "invariant");
384 assert(stream != NULL, "invariant");
385
386 // parsing constant pool entries
387 parse_constant_pool_entries(stream, cp, length, CHECK);
388 if (class_bad_constant_seen() != 0) {
389 // a bad CP entry has been detected previously so stop parsing and just return.
390 return;
391 }
392
393 int index = 1; // declared outside of loops for portability
394
395 // first verification pass - validate cross references
396 // and fixup class and string constants
397 for (index = 1; index < length; index++) { // Index 0 is unused
398 const jbyte tag = cp->tag_at(index).value();
399 switch (tag) {
400 case JVM_CONSTANT_Class: {
401 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
402 break;
403 }
404 case JVM_CONSTANT_Fieldref:
405 // fall through
406 case JVM_CONSTANT_Methodref:
407 // fall through
408 case JVM_CONSTANT_InterfaceMethodref: {
409 if (!_need_verify) break;
410 const int klass_ref_index = cp->klass_ref_index_at(index);
411 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
412 check_property(valid_klass_reference_at(klass_ref_index),
413 "Invalid constant pool index %u in class file %s",
414 klass_ref_index, CHECK);
415 check_property(valid_cp_range(name_and_type_ref_index, length) &&
416 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
417 "Invalid constant pool index %u in class file %s",
418 name_and_type_ref_index, CHECK);
419 break;
420 }
421 case JVM_CONSTANT_String: {
422 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
423 break;
424 }
425 case JVM_CONSTANT_Integer:
426 break;
427 case JVM_CONSTANT_Float:
428 break;
429 case JVM_CONSTANT_Long:
430 case JVM_CONSTANT_Double: {
431 index++;
432 check_property(
433 (index < length && cp->tag_at(index).is_invalid()),
434 "Improper constant pool long/double index %u in class file %s",
435 index, CHECK);
436 break;
437 }
438 case JVM_CONSTANT_NameAndType: {
439 if (!_need_verify) break;
440 const int name_ref_index = cp->name_ref_index_at(index);
441 const int signature_ref_index = cp->signature_ref_index_at(index);
442 check_property(valid_symbol_at(name_ref_index),
443 "Invalid constant pool index %u in class file %s",
444 name_ref_index, CHECK);
445 check_property(valid_symbol_at(signature_ref_index),
446 "Invalid constant pool index %u in class file %s",
447 signature_ref_index, CHECK);
448 break;
449 }
450 case JVM_CONSTANT_Utf8:
451 break;
452 case JVM_CONSTANT_UnresolvedClass: // fall-through
453 case JVM_CONSTANT_UnresolvedClassInError: {
454 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
455 break;
456 }
457 case JVM_CONSTANT_ClassIndex: {
458 const int class_index = cp->klass_index_at(index);
459 check_property(valid_symbol_at(class_index),
460 "Invalid constant pool index %u in class file %s",
461 class_index, CHECK);
462 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
463 break;
464 }
465 case JVM_CONSTANT_StringIndex: {
466 const int string_index = cp->string_index_at(index);
467 check_property(valid_symbol_at(string_index),
468 "Invalid constant pool index %u in class file %s",
469 string_index, CHECK);
470 Symbol* const sym = cp->symbol_at(string_index);
471 cp->unresolved_string_at_put(index, sym);
472 break;
473 }
474 case JVM_CONSTANT_MethodHandle: {
475 const int ref_index = cp->method_handle_index_at(index);
476 check_property(valid_cp_range(ref_index, length),
477 "Invalid constant pool index %u in class file %s",
478 ref_index, CHECK);
479 const constantTag tag = cp->tag_at(ref_index);
480 const int ref_kind = cp->method_handle_ref_kind_at(index);
481
482 switch (ref_kind) {
483 case JVM_REF_getField:
484 case JVM_REF_getStatic:
485 case JVM_REF_putField:
486 case JVM_REF_putStatic: {
487 check_property(
488 tag.is_field(),
489 "Invalid constant pool index %u in class file %s (not a field)",
490 ref_index, CHECK);
491 break;
492 }
493 case JVM_REF_invokeVirtual:
494 case JVM_REF_newInvokeSpecial: {
495 check_property(
496 tag.is_method(),
497 "Invalid constant pool index %u in class file %s (not a method)",
498 ref_index, CHECK);
499 break;
500 }
501 case JVM_REF_invokeStatic:
502 case JVM_REF_invokeSpecial: {
503 check_property(
504 tag.is_method() ||
505 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
506 "Invalid constant pool index %u in class file %s (not a method)",
507 ref_index, CHECK);
508 break;
509 }
510 case JVM_REF_invokeInterface: {
511 check_property(
512 tag.is_interface_method(),
513 "Invalid constant pool index %u in class file %s (not an interface method)",
514 ref_index, CHECK);
515 break;
516 }
517 default: {
518 classfile_parse_error(
519 "Bad method handle kind at constant pool index %u in class file %s",
520 index, CHECK);
521 }
522 } // switch(refkind)
523 // Keep the ref_index unchanged. It will be indirected at link-time.
524 break;
525 } // case MethodHandle
526 case JVM_CONSTANT_MethodType: {
527 const int ref_index = cp->method_type_index_at(index);
528 check_property(valid_symbol_at(ref_index),
529 "Invalid constant pool index %u in class file %s",
530 ref_index, CHECK);
531 break;
532 }
533 case JVM_CONSTANT_InvokeDynamic: {
534 const int name_and_type_ref_index =
535 cp->invoke_dynamic_name_and_type_ref_index_at(index);
536
537 check_property(valid_cp_range(name_and_type_ref_index, length) &&
538 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
539 "Invalid constant pool index %u in class file %s",
540 name_and_type_ref_index, CHECK);
541 // bootstrap specifier index must be checked later,
542 // when BootstrapMethods attr is available
543 break;
544 }
545 default: {
546 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
547 ShouldNotReachHere();
548 break;
549 }
550 } // switch(tag)
551 } // end of for
552
553 if (_cp_patches != NULL) {
554 // need to treat this_class specially...
555 int this_class_index;
556 {
557 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
558 const u1* const mark = stream->current();
559 stream->skip_u2_fast(1); // skip flags
560 this_class_index = stream->get_u2_fast();
561 stream->set_current(mark); // revert to mark
562 }
563
564 for (index = 1; index < length; index++) { // Index 0 is unused
565 if (has_cp_patch_at(index)) {
566 guarantee_property(index != this_class_index,
567 "Illegal constant pool patch to self at %d in class file %s",
568 index, CHECK);
569 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
570 }
571 }
572 }
573
574 if (!_need_verify) {
575 return;
576 }
577
578 // second verification pass - checks the strings are of the right format.
579 // but not yet to the other entries
580 for (index = 1; index < length; index++) {
581 const jbyte tag = cp->tag_at(index).value();
582 switch (tag) {
583 case JVM_CONSTANT_UnresolvedClass: {
584 const Symbol* const class_name = cp->klass_name_at(index);
585 // check the name, even if _cp_patches will overwrite it
586 verify_legal_class_name(class_name, CHECK);
587 break;
588 }
589 case JVM_CONSTANT_NameAndType: {
590 if (_need_verify) {
591 const int sig_index = cp->signature_ref_index_at(index);
592 const int name_index = cp->name_ref_index_at(index);
593 const Symbol* const name = cp->symbol_at(name_index);
594 const Symbol* const sig = cp->symbol_at(sig_index);
595 guarantee_property(sig->utf8_length() != 0,
596 "Illegal zero length constant pool entry at %d in class %s",
597 sig_index, CHECK);
598 guarantee_property(name->utf8_length() != 0,
599 "Illegal zero length constant pool entry at %d in class %s",
600 name_index, CHECK);
601
602 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
603 // Format check method name and signature
604 verify_legal_method_name(name, CHECK);
605 verify_legal_method_signature(name, sig, CHECK);
606 } else {
607 // Format check field name and signature
608 verify_legal_field_name(name, CHECK);
609 verify_legal_field_signature(name, sig, CHECK);
610 }
611 }
612 break;
613 }
614 case JVM_CONSTANT_InvokeDynamic:
615 case JVM_CONSTANT_Fieldref:
616 case JVM_CONSTANT_Methodref:
617 case JVM_CONSTANT_InterfaceMethodref: {
618 const int name_and_type_ref_index =
619 cp->name_and_type_ref_index_at(index);
620 // already verified to be utf8
621 const int name_ref_index =
622 cp->name_ref_index_at(name_and_type_ref_index);
623 // already verified to be utf8
624 const int signature_ref_index =
625 cp->signature_ref_index_at(name_and_type_ref_index);
626 const Symbol* const name = cp->symbol_at(name_ref_index);
627 const Symbol* const signature = cp->symbol_at(signature_ref_index);
628 if (tag == JVM_CONSTANT_Fieldref) {
629 if (_need_verify) {
630 // Field name and signature are verified above, when iterating NameAndType_info.
631 // Need only to be sure signature is non-zero length and the right type.
632 if (signature->utf8_length() == 0 ||
633 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
634 throwIllegalSignature("Field", name, signature, CHECK);
635 }
636 }
637 } else {
638 if (_need_verify) {
639 // Method name and signature are verified above, when iterating NameAndType_info.
640 // Need only to be sure signature is non-zero length and the right type.
641 if (signature->utf8_length() == 0 ||
642 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
643 throwIllegalSignature("Method", name, signature, CHECK);
644 }
645 }
646 // 4509014: If a class method name begins with '<', it must be "<init>"
647 const unsigned int name_len = name->utf8_length();
648 if (tag == JVM_CONSTANT_Methodref &&
649 name_len != 0 &&
650 name->byte_at(0) == '<' &&
651 name != vmSymbols::object_initializer_name()) {
652 classfile_parse_error(
653 "Bad method name at constant pool index %u in class file %s",
654 name_ref_index, CHECK);
655 }
656 }
657 break;
658 }
659 case JVM_CONSTANT_MethodHandle: {
660 const int ref_index = cp->method_handle_index_at(index);
661 const int ref_kind = cp->method_handle_ref_kind_at(index);
662 switch (ref_kind) {
663 case JVM_REF_invokeVirtual:
664 case JVM_REF_invokeStatic:
665 case JVM_REF_invokeSpecial:
666 case JVM_REF_newInvokeSpecial: {
667 const int name_and_type_ref_index =
668 cp->name_and_type_ref_index_at(ref_index);
669 const int name_ref_index =
670 cp->name_ref_index_at(name_and_type_ref_index);
671 const Symbol* const name = cp->symbol_at(name_ref_index);
672 if (ref_kind == JVM_REF_newInvokeSpecial) {
673 if (name != vmSymbols::object_initializer_name()) {
674 classfile_parse_error(
675 "Bad constructor name at constant pool index %u in class file %s",
676 name_ref_index, CHECK);
677 }
678 } else {
679 if (name == vmSymbols::object_initializer_name()) {
680 classfile_parse_error(
681 "Bad method name at constant pool index %u in class file %s",
682 name_ref_index, CHECK);
683 }
684 }
685 break;
686 }
687 // Other ref_kinds are already fully checked in previous pass.
688 } // switch(ref_kind)
689 break;
690 }
691 case JVM_CONSTANT_MethodType: {
692 const Symbol* const no_name = vmSymbols::type_name(); // place holder
693 const Symbol* const signature = cp->method_type_signature_at(index);
694 verify_legal_method_signature(no_name, signature, CHECK);
695 break;
696 }
697 case JVM_CONSTANT_Utf8: {
698 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
699 }
700 } // switch(tag)
701 } // end of for
702 }
703
704 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
705 int index,
706 Handle patch,
707 TRAPS) {
708 assert(cp != NULL, "invariant");
709
710 BasicType patch_type = T_VOID;
711
712 switch (cp->tag_at(index).value()) {
713
714 case JVM_CONSTANT_UnresolvedClass: {
715 // Patching a class means pre-resolving it.
716 // The name in the constant pool is ignored.
717 if (java_lang_Class::is_instance(patch())) {
718 guarantee_property(!java_lang_Class::is_primitive(patch()),
719 "Illegal class patch at %d in class file %s",
720 index, CHECK);
721 cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
722 } else {
723 guarantee_property(java_lang_String::is_instance(patch()),
724 "Illegal class patch at %d in class file %s",
725 index, CHECK);
726 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
727 cp->unresolved_klass_at_put(index, name);
728 }
729 break;
730 }
731
732 case JVM_CONSTANT_String: {
733 // skip this patch and don't clear it. Needs the oop array for resolved
734 // references to be created first.
735 return;
736 }
737 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
738 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
739 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
740 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
741 patch_prim:
742 {
743 jvalue value;
744 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
745 guarantee_property(value_type == patch_type,
746 "Illegal primitive patch at %d in class file %s",
747 index, CHECK);
748 switch (value_type) {
749 case T_INT: cp->int_at_put(index, value.i); break;
750 case T_FLOAT: cp->float_at_put(index, value.f); break;
751 case T_LONG: cp->long_at_put(index, value.j); break;
752 case T_DOUBLE: cp->double_at_put(index, value.d); break;
753 default: assert(false, "");
754 }
755 } // end patch_prim label
756 break;
757
758 default: {
759 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
760 guarantee_property(!has_cp_patch_at(index),
761 "Illegal unexpected patch at %d in class file %s",
762 index, CHECK);
763 return;
764 }
765 } // end of switch(tag)
766
767 // On fall-through, mark the patch as used.
768 clear_cp_patch_at(index);
769 }
770 class NameSigHash: public ResourceObj {
771 public:
772 const Symbol* _name; // name
773 const Symbol* _sig; // signature
774 NameSigHash* _next; // Next entry in hash table
775 };
776
777 static const int HASH_ROW_SIZE = 256;
778
779 static unsigned int hash(const Symbol* name, const Symbol* sig) {
780 unsigned int raw_hash = 0;
781 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
782 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
783
784 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
785 }
786
787
788 static void initialize_hashtable(NameSigHash** table) {
789 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
790 }
791 // Return false if the name/sig combination is found in table.
792 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
793 // The old format checker uses heap sort to find duplicates.
794 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
795 // of table since we don't expect Symbol*'s to move.
796 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
797 assert(name != NULL, "name in constant pool is NULL");
798
799 // First lookup for duplicates
800 int index = hash(name, sig);
801 NameSigHash* entry = table[index];
802 while (entry != NULL) {
803 if (entry->_name == name && entry->_sig == sig) {
804 return false;
805 }
806 entry = entry->_next;
807 }
808
809 // No duplicate is found, allocate a new entry and fill it.
810 entry = new NameSigHash();
811 entry->_name = name;
812 entry->_sig = sig;
813
814 // Insert into hash table
815 entry->_next = table[index];
816 table[index] = entry;
817
818 return true;
819 }
820
821 // Side-effects: populates the _local_interfaces field
822 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
823 const int itfs_len,
824 ConstantPool* const cp,
825 bool* const has_nonstatic_concrete_methods,
826 TRAPS) {
827 assert(stream != NULL, "invariant");
828 assert(cp != NULL, "invariant");
829 assert(has_nonstatic_concrete_methods != NULL, "invariant");
830
831 if (itfs_len == 0) {
832 _local_interfaces = Universe::the_empty_klass_array();
833 } else {
834 assert(itfs_len > 0, "only called for len>0");
835 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
836
837 int index;
838 for (index = 0; index < itfs_len; index++) {
839 const u2 interface_index = stream->get_u2(CHECK);
840 KlassHandle interf;
841 check_property(
842 valid_klass_reference_at(interface_index),
843 "Interface name has bad constant pool index %u in class file %s",
844 interface_index, CHECK);
845 if (cp->tag_at(interface_index).is_klass()) {
846 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
847 } else {
848 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
849
850 // Don't need to check legal name because it's checked when parsing constant pool.
851 // But need to make sure it's not an array type.
852 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
853 "Bad interface name in class file %s", CHECK);
854
855 // Call resolve_super so classcircularity is checked
856 const Klass* const k =
857 SystemDictionary::resolve_super_or_fail(_class_name,
858 unresolved_klass,
859 _loader_data->class_loader(),
860 _protection_domain,
861 false,
862 CHECK);
863 interf = KlassHandle(THREAD, k);
864 }
865
866 if (!interf()->is_interface()) {
867 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
868 "Implementing class");
869 }
870
871 if (InstanceKlass::cast(interf())->has_nonstatic_concrete_methods()) {
872 *has_nonstatic_concrete_methods = true;
873 }
874 _local_interfaces->at_put(index, interf());
875 }
876
877 if (!_need_verify || itfs_len <= 1) {
878 return;
879 }
880
881 // Check if there's any duplicates in interfaces
882 ResourceMark rm(THREAD);
883 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
884 NameSigHash*,
885 HASH_ROW_SIZE);
886 initialize_hashtable(interface_names);
887 bool dup = false;
888 {
889 debug_only(NoSafepointVerifier nsv;)
890 for (index = 0; index < itfs_len; index++) {
891 const Klass* const k = _local_interfaces->at(index);
892 const Symbol* const name = InstanceKlass::cast(k)->name();
893 // If no duplicates, add (name, NULL) in hashtable interface_names.
894 if (!put_after_lookup(name, NULL, interface_names)) {
895 dup = true;
896 break;
897 }
898 }
899 }
900 if (dup) {
901 classfile_parse_error("Duplicate interface name in class file %s", CHECK);
902 }
903 }
904 }
905
906 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
907 int constantvalue_index,
908 int signature_index,
909 TRAPS) const {
910 // Make sure the constant pool entry is of a type appropriate to this field
911 guarantee_property(
912 (constantvalue_index > 0 &&
913 constantvalue_index < cp->length()),
914 "Bad initial value index %u in ConstantValue attribute in class file %s",
915 constantvalue_index, CHECK);
916
917 const constantTag value_type = cp->tag_at(constantvalue_index);
918 switch(cp->basic_type_for_signature_at(signature_index)) {
919 case T_LONG: {
920 guarantee_property(value_type.is_long(),
921 "Inconsistent constant value type in class file %s",
922 CHECK);
923 break;
924 }
925 case T_FLOAT: {
926 guarantee_property(value_type.is_float(),
927 "Inconsistent constant value type in class file %s",
928 CHECK);
929 break;
930 }
931 case T_DOUBLE: {
932 guarantee_property(value_type.is_double(),
933 "Inconsistent constant value type in class file %s",
934 CHECK);
935 break;
936 }
937 case T_BYTE:
938 case T_CHAR:
939 case T_SHORT:
940 case T_BOOLEAN:
941 case T_INT: {
942 guarantee_property(value_type.is_int(),
943 "Inconsistent constant value type in class file %s",
944 CHECK);
945 break;
946 }
947 case T_OBJECT: {
948 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
949 && value_type.is_string()),
950 "Bad string initial value in class file %s",
951 CHECK);
952 break;
953 }
954 default: {
955 classfile_parse_error("Unable to set initial value %u in class file %s",
956 constantvalue_index,
957 CHECK);
958 }
959 }
960 }
961
962 class AnnotationCollector : public ResourceObj{
963 public:
964 enum Location { _in_field, _in_method, _in_class };
965 enum ID {
966 _unknown = 0,
967 _method_CallerSensitive,
968 _method_ForceInline,
969 _method_DontInline,
970 _method_InjectedProfile,
971 _method_LambdaForm_Compiled,
972 _method_LambdaForm_Hidden,
973 _method_HotSpotIntrinsicCandidate,
974 _jdk_internal_vm_annotation_Contended,
975 _field_Stable,
976 _jdk_internal_vm_annotation_ReservedStackAccess,
977 _annotation_LIMIT
978 };
979 const Location _location;
980 int _annotations_present;
981 u2 _contended_group;
982
983 AnnotationCollector(Location location)
984 : _location(location), _annotations_present(0)
985 {
986 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
987 }
988 // If this annotation name has an ID, report it (or _none).
989 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
990 // Set the annotation name:
991 void set_annotation(ID id) {
992 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
993 _annotations_present |= nth_bit((int)id);
994 }
995
996 void remove_annotation(ID id) {
997 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
998 _annotations_present &= ~nth_bit((int)id);
999 }
1000
1001 // Report if the annotation is present.
1002 bool has_any_annotations() const { return _annotations_present != 0; }
1003 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1004
1005 void set_contended_group(u2 group) { _contended_group = group; }
1006 u2 contended_group() const { return _contended_group; }
1007
1008 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1009
1010 void set_stable(bool stable) { set_annotation(_field_Stable); }
1011 bool is_stable() const { return has_annotation(_field_Stable); }
1012 };
1013
1014 // This class also doubles as a holder for metadata cleanup.
1015 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1016 private:
1017 ClassLoaderData* _loader_data;
1018 AnnotationArray* _field_annotations;
1019 AnnotationArray* _field_type_annotations;
1020 public:
1021 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1022 AnnotationCollector(_in_field),
1023 _loader_data(loader_data),
1024 _field_annotations(NULL),
1025 _field_type_annotations(NULL) {}
1026 ~FieldAnnotationCollector();
1027 void apply_to(FieldInfo* f);
1028 AnnotationArray* field_annotations() { return _field_annotations; }
1029 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1030
1031 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1032 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1033 };
1034
1035 class MethodAnnotationCollector : public AnnotationCollector{
1036 public:
1037 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1038 void apply_to(methodHandle m);
1039 };
1040
1041 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1042 public:
1043 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1044 void apply_to(InstanceKlass* ik);
1045 };
1046
1047
1048 static int skip_annotation_value(const u1*, int, int); // fwd decl
1049
1050 // Safely increment index by val if does not pass limit
1051 #define SAFE_ADD(index, limit, val) \
1052 if (index >= limit - val) return limit; \
1053 index += val;
1054
1055 // Skip an annotation. Return >=limit if there is any problem.
1056 static int skip_annotation(const u1* buffer, int limit, int index) {
1057 assert(buffer != NULL, "invariant");
1058 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1059 // value := switch (tag:u1) { ... }
1060 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1061 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1062 while (--nmem >= 0 && index < limit) {
1063 SAFE_ADD(index, limit, 2); // skip member
1064 index = skip_annotation_value(buffer, limit, index);
1065 }
1066 return index;
1067 }
1068
1069 // Skip an annotation value. Return >=limit if there is any problem.
1070 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1071 assert(buffer != NULL, "invariant");
1072
1073 // value := switch (tag:u1) {
1074 // case B, C, I, S, Z, D, F, J, c: con:u2;
1075 // case e: e_class:u2 e_name:u2;
1076 // case s: s_con:u2;
1077 // case [: do(nval:u2) {value};
1078 // case @: annotation;
1079 // case s: s_con:u2;
1080 // }
1081 SAFE_ADD(index, limit, 1); // read tag
1082 const u1 tag = buffer[index - 1];
1083 switch (tag) {
1084 case 'B':
1085 case 'C':
1086 case 'I':
1087 case 'S':
1088 case 'Z':
1089 case 'D':
1090 case 'F':
1091 case 'J':
1092 case 'c':
1093 case 's':
1094 SAFE_ADD(index, limit, 2); // skip con or s_con
1095 break;
1096 case 'e':
1097 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1098 break;
1099 case '[':
1100 {
1101 SAFE_ADD(index, limit, 2); // read nval
1102 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1103 while (--nval >= 0 && index < limit) {
1104 index = skip_annotation_value(buffer, limit, index);
1105 }
1106 }
1107 break;
1108 case '@':
1109 index = skip_annotation(buffer, limit, index);
1110 break;
1111 default:
1112 return limit; // bad tag byte
1113 }
1114 return index;
1115 }
1116
1117 // Sift through annotations, looking for those significant to the VM:
1118 static void parse_annotations(const ConstantPool* const cp,
1119 const u1* buffer, int limit,
1120 AnnotationCollector* coll,
1121 ClassLoaderData* loader_data,
1122 TRAPS) {
1123
1124 assert(cp != NULL, "invariant");
1125 assert(buffer != NULL, "invariant");
1126 assert(coll != NULL, "invariant");
1127 assert(loader_data != NULL, "invariant");
1128
1129 // annotations := do(nann:u2) {annotation}
1130 int index = 2; // read nann
1131 if (index >= limit) return;
1132 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1133 enum { // initial annotation layout
1134 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1135 count_off = 2, // u2 such as 1 (one value)
1136 member_off = 4, // utf8 such as 'value'
1137 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1138 e_tag_val = 'e',
1139 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1140 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1141 e_size = 11, // end of 'e' annotation
1142 c_tag_val = 'c', // payload is type
1143 c_con_off = 7, // utf8 payload, such as 'I'
1144 c_size = 9, // end of 'c' annotation
1145 s_tag_val = 's', // payload is String
1146 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1147 s_size = 9,
1148 min_size = 6 // smallest possible size (zero members)
1149 };
1150 // Cannot add min_size to index in case of overflow MAX_INT
1151 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1152 int index0 = index;
1153 index = skip_annotation(buffer, limit, index);
1154 const u1* const abase = buffer + index0;
1155 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1156 const int count = Bytes::get_Java_u2((address)abase + count_off);
1157 const Symbol* const aname = check_symbol_at(cp, atype);
1158 if (aname == NULL) break; // invalid annotation name
1159 const Symbol* member = NULL;
1160 if (count >= 1) {
1161 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1162 member = check_symbol_at(cp, member_index);
1163 if (member == NULL) break; // invalid member name
1164 }
1165
1166 // Here is where parsing particular annotations will take place.
1167 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1168 if (AnnotationCollector::_unknown == id) continue;
1169 coll->set_annotation(id);
1170
1171 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1172 // @Contended can optionally specify the contention group.
1173 //
1174 // Contended group defines the equivalence class over the fields:
1175 // the fields within the same contended group are not treated distinct.
1176 // The only exception is default group, which does not incur the
1177 // equivalence. Naturally, contention group for classes is meaningless.
1178 //
1179 // While the contention group is specified as String, annotation
1180 // values are already interned, and we might as well use the constant
1181 // pool index as the group tag.
1182 //
1183 u2 group_index = 0; // default contended group
1184 if (count == 1
1185 && s_size == (index - index0) // match size
1186 && s_tag_val == *(abase + tag_off)
1187 && member == vmSymbols::value_name()) {
1188 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1189 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1190 group_index = 0; // default contended group
1191 }
1192 }
1193 coll->set_contended_group(group_index);
1194 }
1195 }
1196 }
1197
1198
1199 // Parse attributes for a field.
1200 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1201 u2 attributes_count,
1202 bool is_static, u2 signature_index,
1203 u2* const constantvalue_index_addr,
1204 bool* const is_synthetic_addr,
1205 u2* const generic_signature_index_addr,
1206 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1207 TRAPS) {
1208 assert(cfs != NULL, "invariant");
1209 assert(constantvalue_index_addr != NULL, "invariant");
1210 assert(is_synthetic_addr != NULL, "invariant");
1211 assert(generic_signature_index_addr != NULL, "invariant");
1212 assert(parsed_annotations != NULL, "invariant");
1213 assert(attributes_count > 0, "attributes_count should be greater than 0");
1214
1215 u2 constantvalue_index = 0;
1216 u2 generic_signature_index = 0;
1217 bool is_synthetic = false;
1218 const u1* runtime_visible_annotations = NULL;
1219 int runtime_visible_annotations_length = 0;
1220 const u1* runtime_invisible_annotations = NULL;
1221 int runtime_invisible_annotations_length = 0;
1222 const u1* runtime_visible_type_annotations = NULL;
1223 int runtime_visible_type_annotations_length = 0;
1224 const u1* runtime_invisible_type_annotations = NULL;
1225 int runtime_invisible_type_annotations_length = 0;
1226 bool runtime_invisible_annotations_exists = false;
1227 bool runtime_invisible_type_annotations_exists = false;
1228 const ConstantPool* const cp = _cp;
1229
1230 while (attributes_count--) {
1231 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1232 const u2 attribute_name_index = cfs->get_u2_fast();
1233 const u4 attribute_length = cfs->get_u4_fast();
1234 check_property(valid_symbol_at(attribute_name_index),
1235 "Invalid field attribute index %u in class file %s",
1236 attribute_name_index,
1237 CHECK);
1238
1239 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1240 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1241 // ignore if non-static
1242 if (constantvalue_index != 0) {
1243 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1244 }
1245 check_property(
1246 attribute_length == 2,
1247 "Invalid ConstantValue field attribute length %u in class file %s",
1248 attribute_length, CHECK);
1249
1250 constantvalue_index = cfs->get_u2(CHECK);
1251 if (_need_verify) {
1252 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1253 }
1254 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1255 if (attribute_length != 0) {
1256 classfile_parse_error(
1257 "Invalid Synthetic field attribute length %u in class file %s",
1258 attribute_length, CHECK);
1259 }
1260 is_synthetic = true;
1261 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1262 if (attribute_length != 0) {
1263 classfile_parse_error(
1264 "Invalid Deprecated field attribute length %u in class file %s",
1265 attribute_length, CHECK);
1266 }
1267 } else if (_major_version >= JAVA_1_5_VERSION) {
1268 if (attribute_name == vmSymbols::tag_signature()) {
1269 if (generic_signature_index != 0) {
1270 classfile_parse_error(
1271 "Multiple Signature attributes for field in class file %s", CHECK);
1272 }
1273 if (attribute_length != 2) {
1274 classfile_parse_error(
1275 "Wrong size %u for field's Signature attribute in class file %s",
1276 attribute_length, CHECK);
1277 }
1278 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1279 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1280 if (runtime_visible_annotations != NULL) {
1281 classfile_parse_error(
1282 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1283 }
1284 runtime_visible_annotations_length = attribute_length;
1285 runtime_visible_annotations = cfs->get_u1_buffer();
1286 assert(runtime_visible_annotations != NULL, "null visible annotations");
1287 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1288 parse_annotations(cp,
1289 runtime_visible_annotations,
1290 runtime_visible_annotations_length,
1291 parsed_annotations,
1292 _loader_data,
1293 CHECK);
1294 cfs->skip_u1_fast(runtime_visible_annotations_length);
1295 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1296 if (runtime_invisible_annotations_exists) {
1297 classfile_parse_error(
1298 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1299 }
1300 runtime_invisible_annotations_exists = true;
1301 if (PreserveAllAnnotations) {
1302 runtime_invisible_annotations_length = attribute_length;
1303 runtime_invisible_annotations = cfs->get_u1_buffer();
1304 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1305 }
1306 cfs->skip_u1(attribute_length, CHECK);
1307 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1308 if (runtime_visible_type_annotations != NULL) {
1309 classfile_parse_error(
1310 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1311 }
1312 runtime_visible_type_annotations_length = attribute_length;
1313 runtime_visible_type_annotations = cfs->get_u1_buffer();
1314 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1315 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1316 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1317 if (runtime_invisible_type_annotations_exists) {
1318 classfile_parse_error(
1319 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1320 } else {
1321 runtime_invisible_type_annotations_exists = true;
1322 }
1323 if (PreserveAllAnnotations) {
1324 runtime_invisible_type_annotations_length = attribute_length;
1325 runtime_invisible_type_annotations = cfs->get_u1_buffer();
1326 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1327 }
1328 cfs->skip_u1(attribute_length, CHECK);
1329 } else {
1330 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1331 }
1332 } else {
1333 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1334 }
1335 }
1336
1337 *constantvalue_index_addr = constantvalue_index;
1338 *is_synthetic_addr = is_synthetic;
1339 *generic_signature_index_addr = generic_signature_index;
1340 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1341 runtime_visible_annotations_length,
1342 runtime_invisible_annotations,
1343 runtime_invisible_annotations_length,
1344 CHECK);
1345 parsed_annotations->set_field_annotations(a);
1346 a = assemble_annotations(runtime_visible_type_annotations,
1347 runtime_visible_type_annotations_length,
1348 runtime_invisible_type_annotations,
1349 runtime_invisible_type_annotations_length,
1350 CHECK);
1351 parsed_annotations->set_field_type_annotations(a);
1352 return;
1353 }
1354
1355
1356 // Field allocation types. Used for computing field offsets.
1357
1358 enum FieldAllocationType {
1359 STATIC_OOP, // Oops
1360 STATIC_BYTE, // Boolean, Byte, char
1361 STATIC_SHORT, // shorts
1362 STATIC_WORD, // ints
1363 STATIC_DOUBLE, // aligned long or double
1364 NONSTATIC_OOP,
1365 NONSTATIC_BYTE,
1366 NONSTATIC_SHORT,
1367 NONSTATIC_WORD,
1368 NONSTATIC_DOUBLE,
1369 MAX_FIELD_ALLOCATION_TYPE,
1370 BAD_ALLOCATION_TYPE = -1
1371 };
1372
1373 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1374 BAD_ALLOCATION_TYPE, // 0
1375 BAD_ALLOCATION_TYPE, // 1
1376 BAD_ALLOCATION_TYPE, // 2
1377 BAD_ALLOCATION_TYPE, // 3
1378 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1379 NONSTATIC_SHORT, // T_CHAR = 5,
1380 NONSTATIC_WORD, // T_FLOAT = 6,
1381 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1382 NONSTATIC_BYTE, // T_BYTE = 8,
1383 NONSTATIC_SHORT, // T_SHORT = 9,
1384 NONSTATIC_WORD, // T_INT = 10,
1385 NONSTATIC_DOUBLE, // T_LONG = 11,
1386 NONSTATIC_OOP, // T_OBJECT = 12,
1387 NONSTATIC_OOP, // T_ARRAY = 13,
1388 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1389 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1390 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1391 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1392 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1393 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1394 BAD_ALLOCATION_TYPE, // 0
1395 BAD_ALLOCATION_TYPE, // 1
1396 BAD_ALLOCATION_TYPE, // 2
1397 BAD_ALLOCATION_TYPE, // 3
1398 STATIC_BYTE , // T_BOOLEAN = 4,
1399 STATIC_SHORT, // T_CHAR = 5,
1400 STATIC_WORD, // T_FLOAT = 6,
1401 STATIC_DOUBLE, // T_DOUBLE = 7,
1402 STATIC_BYTE, // T_BYTE = 8,
1403 STATIC_SHORT, // T_SHORT = 9,
1404 STATIC_WORD, // T_INT = 10,
1405 STATIC_DOUBLE, // T_LONG = 11,
1406 STATIC_OOP, // T_OBJECT = 12,
1407 STATIC_OOP, // T_ARRAY = 13,
1408 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1409 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1410 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1411 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1412 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1413 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1414 };
1415
1416 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1417 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1418 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1419 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1420 return result;
1421 }
1422
1423 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1424 public:
1425 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1426
1427 FieldAllocationCount() {
1428 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1429 count[i] = 0;
1430 }
1431 }
1432
1433 FieldAllocationType update(bool is_static, BasicType type) {
1434 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1435 if (atype != BAD_ALLOCATION_TYPE) {
1436 // Make sure there is no overflow with injected fields.
1437 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1438 count[atype]++;
1439 }
1440 return atype;
1441 }
1442 };
1443
1444 // Side-effects: populates the _fields, _fields_annotations,
1445 // _fields_type_annotations fields
1446 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1447 bool is_interface,
1448 FieldAllocationCount* const fac,
1449 ConstantPool* cp,
1450 const int cp_size,
1451 u2* const java_fields_count_ptr,
1452 TRAPS) {
1453
1454 assert(cfs != NULL, "invariant");
1455 assert(fac != NULL, "invariant");
1456 assert(cp != NULL, "invariant");
1457 assert(java_fields_count_ptr != NULL, "invariant");
1458
1459 assert(NULL == _fields, "invariant");
1460 assert(NULL == _fields_annotations, "invariant");
1461 assert(NULL == _fields_type_annotations, "invariant");
1462
1463 cfs->guarantee_more(2, CHECK); // length
1464 const u2 length = cfs->get_u2_fast();
1465 *java_fields_count_ptr = length;
1466
1467 int num_injected = 0;
1468 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1469 &num_injected);
1470 const int total_fields = length + num_injected;
1471
1472 // The field array starts with tuples of shorts
1473 // [access, name index, sig index, initial value index, byte offset].
1474 // A generic signature slot only exists for field with generic
1475 // signature attribute. And the access flag is set with
1476 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1477 // signature slots are at the end of the field array and after all
1478 // other fields data.
1479 //
1480 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1481 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1482 // ...
1483 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1484 // [generic signature index]
1485 // [generic signature index]
1486 // ...
1487 //
1488 // Allocate a temporary resource array for field data. For each field,
1489 // a slot is reserved in the temporary array for the generic signature
1490 // index. After parsing all fields, the data are copied to a permanent
1491 // array and any unused slots will be discarded.
1492 ResourceMark rm(THREAD);
1493 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1494 u2,
1495 total_fields * (FieldInfo::field_slots + 1));
1496
1497 // The generic signature slots start after all other fields' data.
1498 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1499 int num_generic_signature = 0;
1500 for (int n = 0; n < length; n++) {
1501 // access_flags, name_index, descriptor_index, attributes_count
1502 cfs->guarantee_more(8, CHECK);
1503
1504 AccessFlags access_flags;
1505 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1506 verify_legal_field_modifiers(flags, is_interface, CHECK);
1507 access_flags.set_flags(flags);
1508
1509 const u2 name_index = cfs->get_u2_fast();
1510 check_property(valid_symbol_at(name_index),
1511 "Invalid constant pool index %u for field name in class file %s",
1512 name_index, CHECK);
1513 const Symbol* const name = cp->symbol_at(name_index);
1514 verify_legal_field_name(name, CHECK);
1515
1516 const u2 signature_index = cfs->get_u2_fast();
1517 check_property(valid_symbol_at(signature_index),
1518 "Invalid constant pool index %u for field signature in class file %s",
1519 signature_index, CHECK);
1520 const Symbol* const sig = cp->symbol_at(signature_index);
1521 verify_legal_field_signature(name, sig, CHECK);
1522
1523 u2 constantvalue_index = 0;
1524 bool is_synthetic = false;
1525 u2 generic_signature_index = 0;
1526 const bool is_static = access_flags.is_static();
1527 FieldAnnotationCollector parsed_annotations(_loader_data);
1528
1529 const u2 attributes_count = cfs->get_u2_fast();
1530 if (attributes_count > 0) {
1531 parse_field_attributes(cfs,
1532 attributes_count,
1533 is_static,
1534 signature_index,
1535 &constantvalue_index,
1536 &is_synthetic,
1537 &generic_signature_index,
1538 &parsed_annotations,
1539 CHECK);
1540
1541 if (parsed_annotations.field_annotations() != NULL) {
1542 if (_fields_annotations == NULL) {
1543 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1544 _loader_data, length, NULL,
1545 CHECK);
1546 }
1547 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1548 parsed_annotations.set_field_annotations(NULL);
1549 }
1550 if (parsed_annotations.field_type_annotations() != NULL) {
1551 if (_fields_type_annotations == NULL) {
1552 _fields_type_annotations =
1553 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1554 length,
1555 NULL,
1556 CHECK);
1557 }
1558 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1559 parsed_annotations.set_field_type_annotations(NULL);
1560 }
1561
1562 if (is_synthetic) {
1563 access_flags.set_is_synthetic();
1564 }
1565 if (generic_signature_index != 0) {
1566 access_flags.set_field_has_generic_signature();
1567 fa[generic_signature_slot] = generic_signature_index;
1568 generic_signature_slot ++;
1569 num_generic_signature ++;
1570 }
1571 }
1572
1573 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1574 field->initialize(access_flags.as_short(),
1575 name_index,
1576 signature_index,
1577 constantvalue_index);
1578 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1579
1580 // Remember how many oops we encountered and compute allocation type
1581 const FieldAllocationType atype = fac->update(is_static, type);
1582 field->set_allocation_type(atype);
1583
1584 // After field is initialized with type, we can augment it with aux info
1585 if (parsed_annotations.has_any_annotations())
1586 parsed_annotations.apply_to(field);
1587 }
1588
1589 int index = length;
1590 if (num_injected != 0) {
1591 for (int n = 0; n < num_injected; n++) {
1592 // Check for duplicates
1593 if (injected[n].may_be_java) {
1594 const Symbol* const name = injected[n].name();
1595 const Symbol* const signature = injected[n].signature();
1596 bool duplicate = false;
1597 for (int i = 0; i < length; i++) {
1598 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1599 if (name == cp->symbol_at(f->name_index()) &&
1600 signature == cp->symbol_at(f->signature_index())) {
1601 // Symbol is desclared in Java so skip this one
1602 duplicate = true;
1603 break;
1604 }
1605 }
1606 if (duplicate) {
1607 // These will be removed from the field array at the end
1608 continue;
1609 }
1610 }
1611
1612 // Injected field
1613 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1614 field->initialize(JVM_ACC_FIELD_INTERNAL,
1615 injected[n].name_index,
1616 injected[n].signature_index,
1617 0);
1618
1619 const BasicType type = FieldType::basic_type(injected[n].signature());
1620
1621 // Remember how many oops we encountered and compute allocation type
1622 const FieldAllocationType atype = fac->update(false, type);
1623 field->set_allocation_type(atype);
1624 index++;
1625 }
1626 }
1627
1628 assert(NULL == _fields, "invariant");
1629
1630 _fields =
1631 MetadataFactory::new_array<u2>(_loader_data,
1632 index * FieldInfo::field_slots + num_generic_signature,
1633 CHECK);
1634 // Sometimes injected fields already exist in the Java source so
1635 // the fields array could be too long. In that case the
1636 // fields array is trimed. Also unused slots that were reserved
1637 // for generic signature indexes are discarded.
1638 {
1639 int i = 0;
1640 for (; i < index * FieldInfo::field_slots; i++) {
1641 _fields->at_put(i, fa[i]);
1642 }
1643 for (int j = total_fields * FieldInfo::field_slots;
1644 j < generic_signature_slot; j++) {
1645 _fields->at_put(i++, fa[j]);
1646 }
1647 assert(_fields->length() == i, "");
1648 }
1649
1650 if (_need_verify && length > 1) {
1651 // Check duplicated fields
1652 ResourceMark rm(THREAD);
1653 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1654 THREAD, NameSigHash*, HASH_ROW_SIZE);
1655 initialize_hashtable(names_and_sigs);
1656 bool dup = false;
1657 {
1658 debug_only(NoSafepointVerifier nsv;)
1659 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1660 const Symbol* const name = fs.name();
1661 const Symbol* const sig = fs.signature();
1662 // If no duplicates, add name/signature in hashtable names_and_sigs.
1663 if (!put_after_lookup(name, sig, names_and_sigs)) {
1664 dup = true;
1665 break;
1666 }
1667 }
1668 }
1669 if (dup) {
1670 classfile_parse_error("Duplicate field name&signature in class file %s",
1671 CHECK);
1672 }
1673 }
1674 }
1675
1676
1677 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) {
1678 while (length-- > 0) {
1679 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1680 }
1681 }
1682
1683 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1684 u4 code_length,
1685 u4 exception_table_length,
1686 TRAPS) {
1687 assert(cfs != NULL, "invariant");
1688
1689 const u2* const exception_table_start = cfs->get_u2_buffer();
1690 assert(exception_table_start != NULL, "null exception table");
1691
1692 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1693 // end_pc,
1694 // handler_pc,
1695 // catch_type_index
1696
1697 // Will check legal target after parsing code array in verifier.
1698 if (_need_verify) {
1699 for (unsigned int i = 0; i < exception_table_length; i++) {
1700 const u2 start_pc = cfs->get_u2_fast();
1701 const u2 end_pc = cfs->get_u2_fast();
1702 const u2 handler_pc = cfs->get_u2_fast();
1703 const u2 catch_type_index = cfs->get_u2_fast();
1704 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1705 "Illegal exception table range in class file %s",
1706 CHECK_NULL);
1707 guarantee_property(handler_pc < code_length,
1708 "Illegal exception table handler in class file %s",
1709 CHECK_NULL);
1710 if (catch_type_index != 0) {
1711 guarantee_property(valid_klass_reference_at(catch_type_index),
1712 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1713 }
1714 }
1715 } else {
1716 cfs->skip_u2_fast(exception_table_length * 4);
1717 }
1718 return exception_table_start;
1719 }
1720
1721 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1722 u4 code_length,
1723 CompressedLineNumberWriteStream**const write_stream,
1724 TRAPS) {
1725
1726 const ClassFileStream* const cfs = _stream;
1727 unsigned int num_entries = cfs->get_u2(CHECK);
1728
1729 // Each entry is a u2 start_pc, and a u2 line_number
1730 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1731
1732 // Verify line number attribute and table length
1733 check_property(
1734 code_attribute_length == sizeof(u2) + length_in_bytes,
1735 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1736
1737 cfs->guarantee_more(length_in_bytes, CHECK);
1738
1739 if ((*write_stream) == NULL) {
1740 if (length_in_bytes > fixed_buffer_size) {
1741 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1742 } else {
1743 (*write_stream) = new CompressedLineNumberWriteStream(
1744 _linenumbertable_buffer, fixed_buffer_size);
1745 }
1746 }
1747
1748 while (num_entries-- > 0) {
1749 const u2 bci = cfs->get_u2_fast(); // start_pc
1750 const u2 line = cfs->get_u2_fast(); // line_number
1751 guarantee_property(bci < code_length,
1752 "Invalid pc in LineNumberTable in class file %s", CHECK);
1753 (*write_stream)->write_pair(bci, line);
1754 }
1755 }
1756
1757
1758 class LVT_Hash : public AllStatic {
1759 public:
1760
1761 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1762 /*
1763 * 3-tuple start_bci/length/slot has to be unique key,
1764 * so the following comparison seems to be redundant:
1765 * && elem->name_cp_index == entry->_elem->name_cp_index
1766 */
1767 return (e0.start_bci == e1.start_bci &&
1768 e0.length == e1.length &&
1769 e0.name_cp_index == e1.name_cp_index &&
1770 e0.slot == e1.slot);
1771 }
1772
1773 static unsigned int hash(LocalVariableTableElement const& e0) {
1774 unsigned int raw_hash = e0.start_bci;
1775
1776 raw_hash = e0.length + raw_hash * 37;
1777 raw_hash = e0.name_cp_index + raw_hash * 37;
1778 raw_hash = e0.slot + raw_hash * 37;
1779
1780 return raw_hash;
1781 }
1782 };
1783
1784
1785 // Class file LocalVariableTable elements.
1786 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1787 public:
1788 u2 start_bci;
1789 u2 length;
1790 u2 name_cp_index;
1791 u2 descriptor_cp_index;
1792 u2 slot;
1793 };
1794
1795 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1796 LocalVariableTableElement* const lvt) {
1797 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1798 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1799 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1800 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1801 lvt->signature_cp_index = 0;
1802 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1803 }
1804
1805 // Function is used to parse both attributes:
1806 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1807 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1808 u4 code_length,
1809 u2 max_locals,
1810 u4 code_attribute_length,
1811 u2* const localvariable_table_length,
1812 bool isLVTT,
1813 TRAPS) {
1814 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1815 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1816 const unsigned int size =
1817 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1818
1819 const ConstantPool* const cp = _cp;
1820
1821 // Verify local variable table attribute has right length
1822 if (_need_verify) {
1823 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1824 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1825 }
1826
1827 const u2* const localvariable_table_start = cfs->get_u2_buffer();
1828 assert(localvariable_table_start != NULL, "null local variable table");
1829 if (!_need_verify) {
1830 cfs->skip_u2_fast(size);
1831 } else {
1832 cfs->guarantee_more(size * 2, CHECK_NULL);
1833 for(int i = 0; i < (*localvariable_table_length); i++) {
1834 const u2 start_pc = cfs->get_u2_fast();
1835 const u2 length = cfs->get_u2_fast();
1836 const u2 name_index = cfs->get_u2_fast();
1837 const u2 descriptor_index = cfs->get_u2_fast();
1838 const u2 index = cfs->get_u2_fast();
1839 // Assign to a u4 to avoid overflow
1840 const u4 end_pc = (u4)start_pc + (u4)length;
1841
1842 if (start_pc >= code_length) {
1843 classfile_parse_error(
1844 "Invalid start_pc %u in %s in class file %s",
1845 start_pc, tbl_name, CHECK_NULL);
1846 }
1847 if (end_pc > code_length) {
1848 classfile_parse_error(
1849 "Invalid length %u in %s in class file %s",
1850 length, tbl_name, CHECK_NULL);
1851 }
1852 const int cp_size = cp->length();
1853 guarantee_property(valid_symbol_at(name_index),
1854 "Name index %u in %s has bad constant type in class file %s",
1855 name_index, tbl_name, CHECK_NULL);
1856 guarantee_property(valid_symbol_at(descriptor_index),
1857 "Signature index %u in %s has bad constant type in class file %s",
1858 descriptor_index, tbl_name, CHECK_NULL);
1859
1860 const Symbol* const name = cp->symbol_at(name_index);
1861 const Symbol* const sig = cp->symbol_at(descriptor_index);
1862 verify_legal_field_name(name, CHECK_NULL);
1863 u2 extra_slot = 0;
1864 if (!isLVTT) {
1865 verify_legal_field_signature(name, sig, CHECK_NULL);
1866
1867 // 4894874: check special cases for double and long local variables
1868 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1869 sig == vmSymbols::type_signature(T_LONG)) {
1870 extra_slot = 1;
1871 }
1872 }
1873 guarantee_property((index + extra_slot) < max_locals,
1874 "Invalid index %u in %s in class file %s",
1875 index, tbl_name, CHECK_NULL);
1876 }
1877 }
1878 return localvariable_table_start;
1879 }
1880
1881
1882 void ClassFileParser::parse_type_array(u2 array_length,
1883 u4 code_length,
1884 u4* const u1_index,
1885 u4* const u2_index,
1886 u1* const u1_array,
1887 u2* const u2_array,
1888 TRAPS) {
1889 const ClassFileStream* const cfs = _stream;
1890 u2 index = 0; // index in the array with long/double occupying two slots
1891 u4 i1 = *u1_index;
1892 u4 i2 = *u2_index + 1;
1893 for(int i = 0; i < array_length; i++) {
1894 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1895 index++;
1896 if (tag == ITEM_Long || tag == ITEM_Double) {
1897 index++;
1898 } else if (tag == ITEM_Object) {
1899 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1900 guarantee_property(valid_klass_reference_at(class_index),
1901 "Bad class index %u in StackMap in class file %s",
1902 class_index, CHECK);
1903 } else if (tag == ITEM_Uninitialized) {
1904 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1905 guarantee_property(
1906 offset < code_length,
1907 "Bad uninitialized type offset %u in StackMap in class file %s",
1908 offset, CHECK);
1909 } else {
1910 guarantee_property(
1911 tag <= (u1)ITEM_Uninitialized,
1912 "Unknown variable type %u in StackMap in class file %s",
1913 tag, CHECK);
1914 }
1915 }
1916 u2_array[*u2_index] = index;
1917 *u1_index = i1;
1918 *u2_index = i2;
1919 }
1920
1921 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1922 u4 code_attribute_length,
1923 bool need_verify,
1924 TRAPS) {
1925 assert(cfs != NULL, "invariant");
1926
1927 if (0 == code_attribute_length) {
1928 return NULL;
1929 }
1930
1931 const u1* const stackmap_table_start = cfs->get_u1_buffer();
1932 assert(stackmap_table_start != NULL, "null stackmap table");
1933
1934 // check code_attribute_length first
1935 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1936
1937 if (!need_verify && !DumpSharedSpaces) {
1938 return NULL;
1939 }
1940 return stackmap_table_start;
1941 }
1942
1943 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1944 u2* const checked_exceptions_length,
1945 u4 method_attribute_length,
1946 TRAPS) {
1947 assert(cfs != NULL, "invariant");
1948 assert(checked_exceptions_length != NULL, "invariant");
1949
1950 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1951 *checked_exceptions_length = cfs->get_u2_fast();
1952 const unsigned int size =
1953 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1954 const u2* const checked_exceptions_start = cfs->get_u2_buffer();
1955 assert(checked_exceptions_start != NULL, "null checked exceptions");
1956 if (!_need_verify) {
1957 cfs->skip_u2_fast(size);
1958 } else {
1959 // Verify each value in the checked exception table
1960 u2 checked_exception;
1961 const u2 len = *checked_exceptions_length;
1962 cfs->guarantee_more(2 * len, CHECK_NULL);
1963 for (int i = 0; i < len; i++) {
1964 checked_exception = cfs->get_u2_fast();
1965 check_property(
1966 valid_klass_reference_at(checked_exception),
1967 "Exception name has bad type at constant pool %u in class file %s",
1968 checked_exception, CHECK_NULL);
1969 }
1970 }
1971 // check exceptions attribute length
1972 if (_need_verify) {
1973 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1974 sizeof(u2) * size),
1975 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1976 }
1977 return checked_exceptions_start;
1978 }
1979
1980 void ClassFileParser::throwIllegalSignature(const char* type,
1981 const Symbol* name,
1982 const Symbol* sig,
1983 TRAPS) const {
1984 assert(name != NULL, "invariant");
1985 assert(sig != NULL, "invariant");
1986
1987 ResourceMark rm(THREAD);
1988 Exceptions::fthrow(THREAD_AND_LOCATION,
1989 vmSymbols::java_lang_ClassFormatError(),
1990 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1991 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1992 }
1993
1994 AnnotationCollector::ID
1995 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1996 const Symbol* name) {
1997 const vmSymbols::SID sid = vmSymbols::find_sid(name);
1998 // Privileged code can use all annotations. Other code silently drops some.
1999 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2000 loader_data->is_platform_class_loader_data() ||
2001 loader_data->is_anonymous();
2002 switch (sid) {
2003 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2004 if (_location != _in_method) break; // only allow for methods
2005 if (!privileged) break; // only allow in privileged code
2006 return _method_CallerSensitive;
2007 }
2008 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2009 if (_location != _in_method) break; // only allow for methods
2010 if (!privileged) break; // only allow in privileged code
2011 return _method_ForceInline;
2012 }
2013 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2014 if (_location != _in_method) break; // only allow for methods
2015 if (!privileged) break; // only allow in privileged code
2016 return _method_DontInline;
2017 }
2018 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2019 if (_location != _in_method) break; // only allow for methods
2020 if (!privileged) break; // only allow in privileged code
2021 return _method_InjectedProfile;
2022 }
2023 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2024 if (_location != _in_method) break; // only allow for methods
2025 if (!privileged) break; // only allow in privileged code
2026 return _method_LambdaForm_Compiled;
2027 }
2028 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
2029 if (_location != _in_method) break; // only allow for methods
2030 if (!privileged) break; // only allow in privileged code
2031 return _method_LambdaForm_Hidden;
2032 }
2033 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2034 if (_location != _in_method) break; // only allow for methods
2035 if (!privileged) break; // only allow in privileged code
2036 return _method_HotSpotIntrinsicCandidate;
2037 }
2038 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2039 if (_location != _in_field) break; // only allow for fields
2040 if (!privileged) break; // only allow in privileged code
2041 return _field_Stable;
2042 }
2043 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2044 if (_location != _in_field && _location != _in_class) {
2045 break; // only allow for fields and classes
2046 }
2047 if (!EnableContended || (RestrictContended && !privileged)) {
2048 break; // honor privileges
2049 }
2050 return _jdk_internal_vm_annotation_Contended;
2051 }
2052 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2053 if (_location != _in_method) break; // only allow for methods
2054 if (RestrictReservedStack && !privileged) break; // honor privileges
2055 return _jdk_internal_vm_annotation_ReservedStackAccess;
2056 }
2057 default: {
2058 break;
2059 }
2060 }
2061 return AnnotationCollector::_unknown;
2062 }
2063
2064 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2065 if (is_contended())
2066 f->set_contended_group(contended_group());
2067 if (is_stable())
2068 f->set_stable(true);
2069 }
2070
2071 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2072 // If there's an error deallocate metadata for field annotations
2073 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2074 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2075 }
2076
2077 void MethodAnnotationCollector::apply_to(methodHandle m) {
2078 if (has_annotation(_method_CallerSensitive))
2079 m->set_caller_sensitive(true);
2080 if (has_annotation(_method_ForceInline))
2081 m->set_force_inline(true);
2082 if (has_annotation(_method_DontInline))
2083 m->set_dont_inline(true);
2084 if (has_annotation(_method_InjectedProfile))
2085 m->set_has_injected_profile(true);
2086 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2087 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2088 if (has_annotation(_method_LambdaForm_Hidden))
2089 m->set_hidden(true);
2090 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2091 m->set_intrinsic_candidate(true);
2092 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2093 m->set_has_reserved_stack_access(true);
2094 }
2095
2096 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2097 assert(ik != NULL, "invariant");
2098 ik->set_is_contended(is_contended());
2099 }
2100
2101 #define MAX_ARGS_SIZE 255
2102 #define MAX_CODE_SIZE 65535
2103 #define INITIAL_MAX_LVT_NUMBER 256
2104
2105 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2106 *
2107 * Rules for LVT's and LVTT's are:
2108 * - There can be any number of LVT's and LVTT's.
2109 * - If there are n LVT's, it is the same as if there was just
2110 * one LVT containing all the entries from the n LVT's.
2111 * - There may be no more than one LVT entry per local variable.
2112 * Two LVT entries are 'equal' if these fields are the same:
2113 * start_pc, length, name, slot
2114 * - There may be no more than one LVTT entry per each LVT entry.
2115 * Each LVTT entry has to match some LVT entry.
2116 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2117 */
2118 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2119 int lvt_cnt,
2120 u2* const localvariable_table_length,
2121 const u2**const localvariable_table_start,
2122 int lvtt_cnt,
2123 u2* const localvariable_type_table_length,
2124 const u2**const localvariable_type_table_start,
2125 TRAPS) {
2126
2127 ResourceMark rm(THREAD);
2128
2129 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2130 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2131
2132 LVT_HashTable* const table = new LVT_HashTable();
2133
2134 // To fill LocalVariableTable in
2135 const Classfile_LVT_Element* cf_lvt;
2136 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2137
2138 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2139 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2140 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2141 copy_lvt_element(&cf_lvt[idx], lvt);
2142 // If no duplicates, add LVT elem in hashtable.
2143 if (table->put(*lvt, lvt) == false
2144 && _need_verify
2145 && _major_version >= JAVA_1_5_VERSION) {
2146 classfile_parse_error("Duplicated LocalVariableTable attribute "
2147 "entry for '%s' in class file %s",
2148 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2149 CHECK);
2150 }
2151 }
2152 }
2153
2154 // To merge LocalVariableTable and LocalVariableTypeTable
2155 const Classfile_LVT_Element* cf_lvtt;
2156 LocalVariableTableElement lvtt_elem;
2157
2158 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2159 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2160 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2161 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2162 LocalVariableTableElement** entry = table->get(lvtt_elem);
2163 if (entry == NULL) {
2164 if (_need_verify) {
2165 classfile_parse_error("LVTT entry for '%s' in class file %s "
2166 "does not match any LVT entry",
2167 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2168 CHECK);
2169 }
2170 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2171 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2172 "entry for '%s' in class file %s",
2173 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2174 CHECK);
2175 } else {
2176 // to add generic signatures into LocalVariableTable
2177 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2178 }
2179 }
2180 }
2181 }
2182
2183
2184 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2185 const u1* runtime_visible_annotations,
2186 int runtime_visible_annotations_length,
2187 const u1* runtime_invisible_annotations,
2188 int runtime_invisible_annotations_length,
2189 const u1* runtime_visible_parameter_annotations,
2190 int runtime_visible_parameter_annotations_length,
2191 const u1* runtime_invisible_parameter_annotations,
2192 int runtime_invisible_parameter_annotations_length,
2193 const u1* runtime_visible_type_annotations,
2194 int runtime_visible_type_annotations_length,
2195 const u1* runtime_invisible_type_annotations,
2196 int runtime_invisible_type_annotations_length,
2197 const u1* annotation_default,
2198 int annotation_default_length,
2199 TRAPS) {
2200
2201 AnnotationArray* a;
2202
2203 if (runtime_visible_annotations_length +
2204 runtime_invisible_annotations_length > 0) {
2205 a = assemble_annotations(runtime_visible_annotations,
2206 runtime_visible_annotations_length,
2207 runtime_invisible_annotations,
2208 runtime_invisible_annotations_length,
2209 CHECK);
2210 cm->set_method_annotations(a);
2211 }
2212
2213 if (runtime_visible_parameter_annotations_length +
2214 runtime_invisible_parameter_annotations_length > 0) {
2215 a = assemble_annotations(runtime_visible_parameter_annotations,
2216 runtime_visible_parameter_annotations_length,
2217 runtime_invisible_parameter_annotations,
2218 runtime_invisible_parameter_annotations_length,
2219 CHECK);
2220 cm->set_parameter_annotations(a);
2221 }
2222
2223 if (annotation_default_length > 0) {
2224 a = assemble_annotations(annotation_default,
2225 annotation_default_length,
2226 NULL,
2227 0,
2228 CHECK);
2229 cm->set_default_annotations(a);
2230 }
2231
2232 if (runtime_visible_type_annotations_length +
2233 runtime_invisible_type_annotations_length > 0) {
2234 a = assemble_annotations(runtime_visible_type_annotations,
2235 runtime_visible_type_annotations_length,
2236 runtime_invisible_type_annotations,
2237 runtime_invisible_type_annotations_length,
2238 CHECK);
2239 cm->set_type_annotations(a);
2240 }
2241 }
2242
2243
2244 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2245 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2246 // Method* to save footprint, so we only know the size of the resulting Method* when the
2247 // entire method attribute is parsed.
2248 //
2249 // The promoted_flags parameter is used to pass relevant access_flags
2250 // from the method back up to the containing klass. These flag values
2251 // are added to klass's access_flags.
2252
2253 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2254 bool is_interface,
2255 const ConstantPool* cp,
2256 AccessFlags* const promoted_flags,
2257 TRAPS) {
2258 assert(cfs != NULL, "invariant");
2259 assert(cp != NULL, "invariant");
2260 assert(promoted_flags != NULL, "invariant");
2261
2262 ResourceMark rm(THREAD);
2263 // Parse fixed parts:
2264 // access_flags, name_index, descriptor_index, attributes_count
2265 cfs->guarantee_more(8, CHECK_NULL);
2266
2267 int flags = cfs->get_u2_fast();
2268 const u2 name_index = cfs->get_u2_fast();
2269 const int cp_size = cp->length();
2270 check_property(
2271 valid_symbol_at(name_index),
2272 "Illegal constant pool index %u for method name in class file %s",
2273 name_index, CHECK_NULL);
2274 const Symbol* const name = cp->symbol_at(name_index);
2275 verify_legal_method_name(name, CHECK_NULL);
2276
2277 const u2 signature_index = cfs->get_u2_fast();
2278 guarantee_property(
2279 valid_symbol_at(signature_index),
2280 "Illegal constant pool index %u for method signature in class file %s",
2281 signature_index, CHECK_NULL);
2282 const Symbol* const signature = cp->symbol_at(signature_index);
2283
2284 if (name == vmSymbols::class_initializer_name()) {
2285 // We ignore the other access flags for a valid class initializer.
2286 // (JVM Spec 2nd ed., chapter 4.6)
2287 if (_major_version < 51) { // backward compatibility
2288 flags = JVM_ACC_STATIC;
2289 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2290 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2291 } else {
2292 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2293 }
2294 } else {
2295 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2296 }
2297
2298 if (name == vmSymbols::object_initializer_name() && is_interface) {
2299 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2300 }
2301
2302 int args_size = -1; // only used when _need_verify is true
2303 if (_need_verify) {
2304 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2305 verify_legal_method_signature(name, signature, CHECK_NULL);
2306 if (args_size > MAX_ARGS_SIZE) {
2307 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2308 }
2309 }
2310
2311 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2312
2313 // Default values for code and exceptions attribute elements
2314 u2 max_stack = 0;
2315 u2 max_locals = 0;
2316 u4 code_length = 0;
2317 const u1* code_start = 0;
2318 u2 exception_table_length = 0;
2319 const u2* exception_table_start = NULL;
2320 Array<int>* exception_handlers = Universe::the_empty_int_array();
2321 u2 checked_exceptions_length = 0;
2322 const u2* checked_exceptions_start = NULL;
2323 CompressedLineNumberWriteStream* linenumber_table = NULL;
2324 int linenumber_table_length = 0;
2325 int total_lvt_length = 0;
2326 u2 lvt_cnt = 0;
2327 u2 lvtt_cnt = 0;
2328 bool lvt_allocated = false;
2329 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2330 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2331 u2* localvariable_table_length = NULL;
2332 const u2** localvariable_table_start = NULL;
2333 u2* localvariable_type_table_length = NULL;
2334 const u2** localvariable_type_table_start = NULL;
2335 int method_parameters_length = -1;
2336 const u1* method_parameters_data = NULL;
2337 bool method_parameters_seen = false;
2338 bool parsed_code_attribute = false;
2339 bool parsed_checked_exceptions_attribute = false;
2340 bool parsed_stackmap_attribute = false;
2341 // stackmap attribute - JDK1.5
2342 const u1* stackmap_data = NULL;
2343 int stackmap_data_length = 0;
2344 u2 generic_signature_index = 0;
2345 MethodAnnotationCollector parsed_annotations;
2346 const u1* runtime_visible_annotations = NULL;
2347 int runtime_visible_annotations_length = 0;
2348 const u1* runtime_invisible_annotations = NULL;
2349 int runtime_invisible_annotations_length = 0;
2350 const u1* runtime_visible_parameter_annotations = NULL;
2351 int runtime_visible_parameter_annotations_length = 0;
2352 const u1* runtime_invisible_parameter_annotations = NULL;
2353 int runtime_invisible_parameter_annotations_length = 0;
2354 const u1* runtime_visible_type_annotations = NULL;
2355 int runtime_visible_type_annotations_length = 0;
2356 const u1* runtime_invisible_type_annotations = NULL;
2357 int runtime_invisible_type_annotations_length = 0;
2358 bool runtime_invisible_annotations_exists = false;
2359 bool runtime_invisible_type_annotations_exists = false;
2360 bool runtime_invisible_parameter_annotations_exists = false;
2361 const u1* annotation_default = NULL;
2362 int annotation_default_length = 0;
2363
2364 // Parse code and exceptions attribute
2365 u2 method_attributes_count = cfs->get_u2_fast();
2366 while (method_attributes_count--) {
2367 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2368 const u2 method_attribute_name_index = cfs->get_u2_fast();
2369 const u4 method_attribute_length = cfs->get_u4_fast();
2370 check_property(
2371 valid_symbol_at(method_attribute_name_index),
2372 "Invalid method attribute name index %u in class file %s",
2373 method_attribute_name_index, CHECK_NULL);
2374
2375 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2376 if (method_attribute_name == vmSymbols::tag_code()) {
2377 // Parse Code attribute
2378 if (_need_verify) {
2379 guarantee_property(
2380 !access_flags.is_native() && !access_flags.is_abstract(),
2381 "Code attribute in native or abstract methods in class file %s",
2382 CHECK_NULL);
2383 }
2384 if (parsed_code_attribute) {
2385 classfile_parse_error("Multiple Code attributes in class file %s",
2386 CHECK_NULL);
2387 }
2388 parsed_code_attribute = true;
2389
2390 // Stack size, locals size, and code size
2391 if (_major_version == 45 && _minor_version <= 2) {
2392 cfs->guarantee_more(4, CHECK_NULL);
2393 max_stack = cfs->get_u1_fast();
2394 max_locals = cfs->get_u1_fast();
2395 code_length = cfs->get_u2_fast();
2396 } else {
2397 cfs->guarantee_more(8, CHECK_NULL);
2398 max_stack = cfs->get_u2_fast();
2399 max_locals = cfs->get_u2_fast();
2400 code_length = cfs->get_u4_fast();
2401 }
2402 if (_need_verify) {
2403 guarantee_property(args_size <= max_locals,
2404 "Arguments can't fit into locals in class file %s",
2405 CHECK_NULL);
2406 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2407 "Invalid method Code length %u in class file %s",
2408 code_length, CHECK_NULL);
2409 }
2410 // Code pointer
2411 code_start = cfs->get_u1_buffer();
2412 assert(code_start != NULL, "null code start");
2413 cfs->guarantee_more(code_length, CHECK_NULL);
2414 cfs->skip_u1_fast(code_length);
2415
2416 // Exception handler table
2417 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2418 exception_table_length = cfs->get_u2_fast();
2419 if (exception_table_length > 0) {
2420 exception_table_start = parse_exception_table(cfs,
2421 code_length,
2422 exception_table_length,
2423 CHECK_NULL);
2424 }
2425
2426 // Parse additional attributes in code attribute
2427 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2428 u2 code_attributes_count = cfs->get_u2_fast();
2429
2430 unsigned int calculated_attribute_length = 0;
2431
2432 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2433 calculated_attribute_length =
2434 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2435 } else {
2436 // max_stack, locals and length are smaller in pre-version 45.2 classes
2437 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2438 }
2439 calculated_attribute_length +=
2440 code_length +
2441 sizeof(exception_table_length) +
2442 sizeof(code_attributes_count) +
2443 exception_table_length *
2444 ( sizeof(u2) + // start_pc
2445 sizeof(u2) + // end_pc
2446 sizeof(u2) + // handler_pc
2447 sizeof(u2) ); // catch_type_index
2448
2449 while (code_attributes_count--) {
2450 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2451 const u2 code_attribute_name_index = cfs->get_u2_fast();
2452 const u4 code_attribute_length = cfs->get_u4_fast();
2453 calculated_attribute_length += code_attribute_length +
2454 sizeof(code_attribute_name_index) +
2455 sizeof(code_attribute_length);
2456 check_property(valid_symbol_at(code_attribute_name_index),
2457 "Invalid code attribute name index %u in class file %s",
2458 code_attribute_name_index,
2459 CHECK_NULL);
2460 if (LoadLineNumberTables &&
2461 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2462 // Parse and compress line number table
2463 parse_linenumber_table(code_attribute_length,
2464 code_length,
2465 &linenumber_table,
2466 CHECK_NULL);
2467
2468 } else if (LoadLocalVariableTables &&
2469 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2470 // Parse local variable table
2471 if (!lvt_allocated) {
2472 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2473 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2474 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2475 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2476 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2477 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2478 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2479 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2480 lvt_allocated = true;
2481 }
2482 if (lvt_cnt == max_lvt_cnt) {
2483 max_lvt_cnt <<= 1;
2484 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2485 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2486 }
2487 localvariable_table_start[lvt_cnt] =
2488 parse_localvariable_table(cfs,
2489 code_length,
2490 max_locals,
2491 code_attribute_length,
2492 &localvariable_table_length[lvt_cnt],
2493 false, // is not LVTT
2494 CHECK_NULL);
2495 total_lvt_length += localvariable_table_length[lvt_cnt];
2496 lvt_cnt++;
2497 } else if (LoadLocalVariableTypeTables &&
2498 _major_version >= JAVA_1_5_VERSION &&
2499 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2500 if (!lvt_allocated) {
2501 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2502 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2503 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2504 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2505 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2506 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2507 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2508 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2509 lvt_allocated = true;
2510 }
2511 // Parse local variable type table
2512 if (lvtt_cnt == max_lvtt_cnt) {
2513 max_lvtt_cnt <<= 1;
2514 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2515 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2516 }
2517 localvariable_type_table_start[lvtt_cnt] =
2518 parse_localvariable_table(cfs,
2519 code_length,
2520 max_locals,
2521 code_attribute_length,
2522 &localvariable_type_table_length[lvtt_cnt],
2523 true, // is LVTT
2524 CHECK_NULL);
2525 lvtt_cnt++;
2526 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2527 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2528 // Stack map is only needed by the new verifier in JDK1.5.
2529 if (parsed_stackmap_attribute) {
2530 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2531 }
2532 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2533 stackmap_data_length = code_attribute_length;
2534 parsed_stackmap_attribute = true;
2535 } else {
2536 // Skip unknown attributes
2537 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2538 }
2539 }
2540 // check method attribute length
2541 if (_need_verify) {
2542 guarantee_property(method_attribute_length == calculated_attribute_length,
2543 "Code segment has wrong length in class file %s",
2544 CHECK_NULL);
2545 }
2546 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2547 // Parse Exceptions attribute
2548 if (parsed_checked_exceptions_attribute) {
2549 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2550 CHECK_NULL);
2551 }
2552 parsed_checked_exceptions_attribute = true;
2553 checked_exceptions_start =
2554 parse_checked_exceptions(cfs,
2555 &checked_exceptions_length,
2556 method_attribute_length,
2557 CHECK_NULL);
2558 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2559 // reject multiple method parameters
2560 if (method_parameters_seen) {
2561 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2562 CHECK_NULL);
2563 }
2564 method_parameters_seen = true;
2565 method_parameters_length = cfs->get_u1_fast();
2566 const u2 real_length = (method_parameters_length * 4u) + 1u;
2567 if (method_attribute_length != real_length) {
2568 classfile_parse_error(
2569 "Invalid MethodParameters method attribute length %u in class file",
2570 method_attribute_length, CHECK_NULL);
2571 }
2572 method_parameters_data = cfs->get_u1_buffer();
2573 cfs->skip_u2_fast(method_parameters_length);
2574 cfs->skip_u2_fast(method_parameters_length);
2575 // ignore this attribute if it cannot be reflected
2576 if (!SystemDictionary::Parameter_klass_loaded())
2577 method_parameters_length = -1;
2578 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2579 if (method_attribute_length != 0) {
2580 classfile_parse_error(
2581 "Invalid Synthetic method attribute length %u in class file %s",
2582 method_attribute_length, CHECK_NULL);
2583 }
2584 // Should we check that there hasn't already been a synthetic attribute?
2585 access_flags.set_is_synthetic();
2586 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2587 if (method_attribute_length != 0) {
2588 classfile_parse_error(
2589 "Invalid Deprecated method attribute length %u in class file %s",
2590 method_attribute_length, CHECK_NULL);
2591 }
2592 } else if (_major_version >= JAVA_1_5_VERSION) {
2593 if (method_attribute_name == vmSymbols::tag_signature()) {
2594 if (generic_signature_index != 0) {
2595 classfile_parse_error(
2596 "Multiple Signature attributes for method in class file %s",
2597 CHECK_NULL);
2598 }
2599 if (method_attribute_length != 2) {
2600 classfile_parse_error(
2601 "Invalid Signature attribute length %u in class file %s",
2602 method_attribute_length, CHECK_NULL);
2603 }
2604 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2605 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2606 if (runtime_visible_annotations != NULL) {
2607 classfile_parse_error(
2608 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2609 CHECK_NULL);
2610 }
2611 runtime_visible_annotations_length = method_attribute_length;
2612 runtime_visible_annotations = cfs->get_u1_buffer();
2613 assert(runtime_visible_annotations != NULL, "null visible annotations");
2614 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2615 parse_annotations(cp,
2616 runtime_visible_annotations,
2617 runtime_visible_annotations_length,
2618 &parsed_annotations,
2619 _loader_data,
2620 CHECK_NULL);
2621 cfs->skip_u1_fast(runtime_visible_annotations_length);
2622 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2623 if (runtime_invisible_annotations_exists) {
2624 classfile_parse_error(
2625 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2626 CHECK_NULL);
2627 }
2628 runtime_invisible_annotations_exists = true;
2629 if (PreserveAllAnnotations) {
2630 runtime_invisible_annotations_length = method_attribute_length;
2631 runtime_invisible_annotations = cfs->get_u1_buffer();
2632 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2633 }
2634 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2635 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2636 if (runtime_visible_parameter_annotations != NULL) {
2637 classfile_parse_error(
2638 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2639 CHECK_NULL);
2640 }
2641 runtime_visible_parameter_annotations_length = method_attribute_length;
2642 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2643 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2644 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2645 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2646 if (runtime_invisible_parameter_annotations_exists) {
2647 classfile_parse_error(
2648 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2649 CHECK_NULL);
2650 }
2651 runtime_invisible_parameter_annotations_exists = true;
2652 if (PreserveAllAnnotations) {
2653 runtime_invisible_parameter_annotations_length = method_attribute_length;
2654 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2655 assert(runtime_invisible_parameter_annotations != NULL,
2656 "null invisible parameter annotations");
2657 }
2658 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2659 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2660 if (annotation_default != NULL) {
2661 classfile_parse_error(
2662 "Multiple AnnotationDefault attributes for method in class file %s",
2663 CHECK_NULL);
2664 }
2665 annotation_default_length = method_attribute_length;
2666 annotation_default = cfs->get_u1_buffer();
2667 assert(annotation_default != NULL, "null annotation default");
2668 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2669 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2670 if (runtime_visible_type_annotations != NULL) {
2671 classfile_parse_error(
2672 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2673 CHECK_NULL);
2674 }
2675 runtime_visible_type_annotations_length = method_attribute_length;
2676 runtime_visible_type_annotations = cfs->get_u1_buffer();
2677 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2678 // No need for the VM to parse Type annotations
2679 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2680 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2681 if (runtime_invisible_type_annotations_exists) {
2682 classfile_parse_error(
2683 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2684 CHECK_NULL);
2685 } else {
2686 runtime_invisible_type_annotations_exists = true;
2687 }
2688 if (PreserveAllAnnotations) {
2689 runtime_invisible_type_annotations_length = method_attribute_length;
2690 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2691 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2692 }
2693 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2694 } else {
2695 // Skip unknown attributes
2696 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2697 }
2698 } else {
2699 // Skip unknown attributes
2700 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2701 }
2702 }
2703
2704 if (linenumber_table != NULL) {
2705 linenumber_table->write_terminator();
2706 linenumber_table_length = linenumber_table->position();
2707 }
2708
2709 // Make sure there's at least one Code attribute in non-native/non-abstract method
2710 if (_need_verify) {
2711 guarantee_property(access_flags.is_native() ||
2712 access_flags.is_abstract() ||
2713 parsed_code_attribute,
2714 "Absent Code attribute in method that is not native or abstract in class file %s",
2715 CHECK_NULL);
2716 }
2717
2718 // All sizing information for a Method* is finally available, now create it
2719 InlineTableSizes sizes(
2720 total_lvt_length,
2721 linenumber_table_length,
2722 exception_table_length,
2723 checked_exceptions_length,
2724 method_parameters_length,
2725 generic_signature_index,
2726 runtime_visible_annotations_length +
2727 runtime_invisible_annotations_length,
2728 runtime_visible_parameter_annotations_length +
2729 runtime_invisible_parameter_annotations_length,
2730 runtime_visible_type_annotations_length +
2731 runtime_invisible_type_annotations_length,
2732 annotation_default_length,
2733 0);
2734
2735 Method* const m = Method::allocate(_loader_data,
2736 code_length,
2737 access_flags,
2738 &sizes,
2739 ConstMethod::NORMAL,
2740 CHECK_NULL);
2741
2742 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2743
2744 // Fill in information from fixed part (access_flags already set)
2745 m->set_constants(_cp);
2746 m->set_name_index(name_index);
2747 m->set_signature_index(signature_index);
2748
2749 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2750 m->constMethod()->set_result_type(rtf.type());
2751
2752 if (args_size >= 0) {
2753 m->set_size_of_parameters(args_size);
2754 } else {
2755 m->compute_size_of_parameters(THREAD);
2756 }
2757 #ifdef ASSERT
2758 if (args_size >= 0) {
2759 m->compute_size_of_parameters(THREAD);
2760 assert(args_size == m->size_of_parameters(), "");
2761 }
2762 #endif
2763
2764 // Fill in code attribute information
2765 m->set_max_stack(max_stack);
2766 m->set_max_locals(max_locals);
2767 if (stackmap_data != NULL) {
2768 m->constMethod()->copy_stackmap_data(_loader_data,
2769 (u1*)stackmap_data,
2770 stackmap_data_length,
2771 CHECK_NULL);
2772 }
2773
2774 // Copy byte codes
2775 m->set_code((u1*)code_start);
2776
2777 // Copy line number table
2778 if (linenumber_table != NULL) {
2779 memcpy(m->compressed_linenumber_table(),
2780 linenumber_table->buffer(),
2781 linenumber_table_length);
2782 }
2783
2784 // Copy exception table
2785 if (exception_table_length > 0) {
2786 int size =
2787 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2788 copy_u2_with_conversion((u2*) m->exception_table_start(),
2789 exception_table_start, size);
2790 }
2791
2792 // Copy method parameters
2793 if (method_parameters_length > 0) {
2794 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2795 for (int i = 0; i < method_parameters_length; i++) {
2796 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2797 method_parameters_data += 2;
2798 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2799 method_parameters_data += 2;
2800 }
2801 }
2802
2803 // Copy checked exceptions
2804 if (checked_exceptions_length > 0) {
2805 const int size =
2806 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2807 copy_u2_with_conversion((u2*) m->checked_exceptions_start(),
2808 checked_exceptions_start,
2809 size);
2810 }
2811
2812 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2813 if (total_lvt_length > 0) {
2814 promoted_flags->set_has_localvariable_table();
2815 copy_localvariable_table(m->constMethod(),
2816 lvt_cnt,
2817 localvariable_table_length,
2818 localvariable_table_start,
2819 lvtt_cnt,
2820 localvariable_type_table_length,
2821 localvariable_type_table_start,
2822 CHECK_NULL);
2823 }
2824
2825 if (parsed_annotations.has_any_annotations())
2826 parsed_annotations.apply_to(m);
2827
2828 // Copy annotations
2829 copy_method_annotations(m->constMethod(),
2830 runtime_visible_annotations,
2831 runtime_visible_annotations_length,
2832 runtime_invisible_annotations,
2833 runtime_invisible_annotations_length,
2834 runtime_visible_parameter_annotations,
2835 runtime_visible_parameter_annotations_length,
2836 runtime_invisible_parameter_annotations,
2837 runtime_invisible_parameter_annotations_length,
2838 runtime_visible_type_annotations,
2839 runtime_visible_type_annotations_length,
2840 runtime_invisible_type_annotations,
2841 runtime_invisible_type_annotations_length,
2842 annotation_default,
2843 annotation_default_length,
2844 CHECK_NULL);
2845
2846 if (name == vmSymbols::finalize_method_name() &&
2847 signature == vmSymbols::void_method_signature()) {
2848 if (m->is_empty_method()) {
2849 _has_empty_finalizer = true;
2850 } else {
2851 _has_finalizer = true;
2852 }
2853 }
2854 if (name == vmSymbols::object_initializer_name() &&
2855 signature == vmSymbols::void_method_signature() &&
2856 m->is_vanilla_constructor()) {
2857 _has_vanilla_constructor = true;
2858 }
2859
2860 NOT_PRODUCT(m->verify());
2861 return m;
2862 }
2863
2864
2865 // The promoted_flags parameter is used to pass relevant access_flags
2866 // from the methods back up to the containing klass. These flag values
2867 // are added to klass's access_flags.
2868 // Side-effects: populates the _methods field in the parser
2869 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2870 bool is_interface,
2871 AccessFlags* promoted_flags,
2872 bool* has_final_method,
2873 bool* declares_nonstatic_concrete_methods,
2874 TRAPS) {
2875 assert(cfs != NULL, "invariant");
2876 assert(promoted_flags != NULL, "invariant");
2877 assert(has_final_method != NULL, "invariant");
2878 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2879
2880 assert(NULL == _methods, "invariant");
2881
2882 cfs->guarantee_more(2, CHECK); // length
2883 const u2 length = cfs->get_u2_fast();
2884 if (length == 0) {
2885 _methods = Universe::the_empty_method_array();
2886 } else {
2887 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2888 length,
2889 NULL,
2890 CHECK);
2891
2892 HandleMark hm(THREAD);
2893 for (int index = 0; index < length; index++) {
2894 Method* method = parse_method(cfs,
2895 is_interface,
2896 _cp,
2897 promoted_flags,
2898 CHECK);
2899
2900 if (method->is_final()) {
2901 *has_final_method = true;
2902 }
2903 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2904 // used for interface initialization, and default method inheritance analysis
2905 if (is_interface && !(*declares_nonstatic_concrete_methods)
2906 && !method->is_abstract() && !method->is_static()) {
2907 *declares_nonstatic_concrete_methods = true;
2908 }
2909 _methods->at_put(index, method);
2910 }
2911
2912 if (_need_verify && length > 1) {
2913 // Check duplicated methods
2914 ResourceMark rm(THREAD);
2915 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2916 THREAD, NameSigHash*, HASH_ROW_SIZE);
2917 initialize_hashtable(names_and_sigs);
2918 bool dup = false;
2919 {
2920 debug_only(NoSafepointVerifier nsv;)
2921 for (int i = 0; i < length; i++) {
2922 const Method* const m = _methods->at(i);
2923 // If no duplicates, add name/signature in hashtable names_and_sigs.
2924 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2925 dup = true;
2926 break;
2927 }
2928 }
2929 }
2930 if (dup) {
2931 classfile_parse_error("Duplicate method name&signature in class file %s",
2932 CHECK);
2933 }
2934 }
2935 }
2936 }
2937
2938 static const intArray* sort_methods(Array<Method*>* methods) {
2939 const int length = methods->length();
2940 // If JVMTI original method ordering or sharing is enabled we have to
2941 // remember the original class file ordering.
2942 // We temporarily use the vtable_index field in the Method* to store the
2943 // class file index, so we can read in after calling qsort.
2944 // Put the method ordering in the shared archive.
2945 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2946 for (int index = 0; index < length; index++) {
2947 Method* const m = methods->at(index);
2948 assert(!m->valid_vtable_index(), "vtable index should not be set");
2949 m->set_vtable_index(index);
2950 }
2951 }
2952 // Sort method array by ascending method name (for faster lookups & vtable construction)
2953 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2954 Method::sort_methods(methods);
2955
2956 intArray* method_ordering = NULL;
2957 // If JVMTI original method ordering or sharing is enabled construct int
2958 // array remembering the original ordering
2959 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2960 method_ordering = new intArray(length, length, -1);
2961 for (int index = 0; index < length; index++) {
2962 Method* const m = methods->at(index);
2963 const int old_index = m->vtable_index();
2964 assert(old_index >= 0 && old_index < length, "invalid method index");
2965 method_ordering->at_put(index, old_index);
2966 m->set_vtable_index(Method::invalid_vtable_index);
2967 }
2968 }
2969 return method_ordering;
2970 }
2971
2972 // Parse generic_signature attribute for methods and fields
2973 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2974 TRAPS) {
2975 assert(cfs != NULL, "invariant");
2976
2977 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2978 const u2 generic_signature_index = cfs->get_u2_fast();
2979 check_property(
2980 valid_symbol_at(generic_signature_index),
2981 "Invalid Signature attribute at constant pool index %u in class file %s",
2982 generic_signature_index, CHECK_0);
2983 return generic_signature_index;
2984 }
2985
2986 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2987 TRAPS) {
2988
2989 assert(cfs != NULL, "invariant");
2990
2991 cfs->guarantee_more(2, CHECK); // sourcefile_index
2992 const u2 sourcefile_index = cfs->get_u2_fast();
2993 check_property(
2994 valid_symbol_at(sourcefile_index),
2995 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2996 sourcefile_index, CHECK);
2997 set_class_sourcefile_index(sourcefile_index);
2998 }
2999
3000 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3001 int length,
3002 TRAPS) {
3003 assert(cfs != NULL, "invariant");
3004
3005 const u1* const sde_buffer = cfs->get_u1_buffer();
3006 assert(sde_buffer != NULL, "null sde buffer");
3007
3008 // Don't bother storing it if there is no way to retrieve it
3009 if (JvmtiExport::can_get_source_debug_extension()) {
3010 assert((length+1) > length, "Overflow checking");
3011 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3012 for (int i = 0; i < length; i++) {
3013 sde[i] = sde_buffer[i];
3014 }
3015 sde[length] = '\0';
3016 set_class_sde_buffer((const char*)sde, length);
3017 }
3018 // Got utf8 string, set stream position forward
3019 cfs->skip_u1(length, CHECK);
3020 }
3021
3022
3023 // Inner classes can be static, private or protected (classic VM does this)
3024 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3025 JVM_ACC_PRIVATE | \
3026 JVM_ACC_PROTECTED | \
3027 JVM_ACC_STATIC \
3028 )
3029
3030 // Return number of classes in the inner classes attribute table
3031 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3032 const u1* const inner_classes_attribute_start,
3033 bool parsed_enclosingmethod_attribute,
3034 u2 enclosing_method_class_index,
3035 u2 enclosing_method_method_index,
3036 TRAPS) {
3037 const u1* const current_mark = cfs->current();
3038 u2 length = 0;
3039 if (inner_classes_attribute_start != NULL) {
3040 cfs->set_current(inner_classes_attribute_start);
3041 cfs->guarantee_more(2, CHECK_0); // length
3042 length = cfs->get_u2_fast();
3043 }
3044
3045 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3046 // method data:
3047 // [inner_class_info_index,
3048 // outer_class_info_index,
3049 // inner_name_index,
3050 // inner_class_access_flags,
3051 // ...
3052 // enclosing_method_class_index,
3053 // enclosing_method_method_index]
3054 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3055 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3056 _inner_classes = inner_classes;
3057
3058 int index = 0;
3059 const int cp_size = _cp->length();
3060 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3061 for (int n = 0; n < length; n++) {
3062 // Inner class index
3063 const u2 inner_class_info_index = cfs->get_u2_fast();
3064 check_property(
3065 valid_klass_reference_at(inner_class_info_index),
3066 "inner_class_info_index %u has bad constant type in class file %s",
3067 inner_class_info_index, CHECK_0);
3068 // Outer class index
3069 const u2 outer_class_info_index = cfs->get_u2_fast();
3070 check_property(
3071 outer_class_info_index == 0 ||
3072 valid_klass_reference_at(outer_class_info_index),
3073 "outer_class_info_index %u has bad constant type in class file %s",
3074 outer_class_info_index, CHECK_0);
3075 // Inner class name
3076 const u2 inner_name_index = cfs->get_u2_fast();
3077 check_property(
3078 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3079 "inner_name_index %u has bad constant type in class file %s",
3080 inner_name_index, CHECK_0);
3081 if (_need_verify) {
3082 guarantee_property(inner_class_info_index != outer_class_info_index,
3083 "Class is both outer and inner class in class file %s", CHECK_0);
3084 }
3085 // Access flags
3086 jint flags;
3087 // JVM_ACC_MODULE is defined in JDK-9 and later.
3088 if (_major_version >= JAVA_9_VERSION) {
3089 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3090 } else {
3091 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3092 }
3093 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3094 // Set abstract bit for old class files for backward compatibility
3095 flags |= JVM_ACC_ABSTRACT;
3096 }
3097 verify_legal_class_modifiers(flags, CHECK_0);
3098 AccessFlags inner_access_flags(flags);
3099
3100 inner_classes->at_put(index++, inner_class_info_index);
3101 inner_classes->at_put(index++, outer_class_info_index);
3102 inner_classes->at_put(index++, inner_name_index);
3103 inner_classes->at_put(index++, inner_access_flags.as_short());
3104 }
3105
3106 // 4347400: make sure there's no duplicate entry in the classes array
3107 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3108 for(int i = 0; i < length * 4; i += 4) {
3109 for(int j = i + 4; j < length * 4; j += 4) {
3110 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3111 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3112 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3113 inner_classes->at(i+3) != inner_classes->at(j+3)),
3114 "Duplicate entry in InnerClasses in class file %s",
3115 CHECK_0);
3116 }
3117 }
3118 }
3119
3120 // Set EnclosingMethod class and method indexes.
3121 if (parsed_enclosingmethod_attribute) {
3122 inner_classes->at_put(index++, enclosing_method_class_index);
3123 inner_classes->at_put(index++, enclosing_method_method_index);
3124 }
3125 assert(index == size, "wrong size");
3126
3127 // Restore buffer's current position.
3128 cfs->set_current(current_mark);
3129
3130 return length;
3131 }
3132
3133 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3134 set_class_synthetic_flag(true);
3135 }
3136
3137 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3138 assert(cfs != NULL, "invariant");
3139
3140 const u2 signature_index = cfs->get_u2(CHECK);
3141 check_property(
3142 valid_symbol_at(signature_index),
3143 "Invalid constant pool index %u in Signature attribute in class file %s",
3144 signature_index, CHECK);
3145 set_class_generic_signature_index(signature_index);
3146 }
3147
3148 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3149 ConstantPool* cp,
3150 u4 attribute_byte_length,
3151 TRAPS) {
3152 assert(cfs != NULL, "invariant");
3153 assert(cp != NULL, "invariant");
3154
3155 const u1* const current_start = cfs->current();
3156
3157 guarantee_property(attribute_byte_length >= sizeof(u2),
3158 "Invalid BootstrapMethods attribute length %u in class file %s",
3159 attribute_byte_length,
3160 CHECK);
3161
3162 cfs->guarantee_more(attribute_byte_length, CHECK);
3163
3164 const int attribute_array_length = cfs->get_u2_fast();
3165
3166 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3167 "Short length on BootstrapMethods in class file %s",
3168 CHECK);
3169
3170
3171 // The attribute contains a counted array of counted tuples of shorts,
3172 // represending bootstrap specifiers:
3173 // length*{bootstrap_method_index, argument_count*{argument_index}}
3174 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3175 // operand_count = number of shorts in attr, except for leading length
3176
3177 // The attribute is copied into a short[] array.
3178 // The array begins with a series of short[2] pairs, one for each tuple.
3179 const int index_size = (attribute_array_length * 2);
3180
3181 Array<u2>* const operands =
3182 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3183
3184 // Eagerly assign operands so they will be deallocated with the constant
3185 // pool if there is an error.
3186 cp->set_operands(operands);
3187
3188 int operand_fill_index = index_size;
3189 const int cp_size = cp->length();
3190
3191 for (int n = 0; n < attribute_array_length; n++) {
3192 // Store a 32-bit offset into the header of the operand array.
3193 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3194
3195 // Read a bootstrap specifier.
3196 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3197 const u2 bootstrap_method_index = cfs->get_u2_fast();
3198 const u2 argument_count = cfs->get_u2_fast();
3199 check_property(
3200 valid_cp_range(bootstrap_method_index, cp_size) &&
3201 cp->tag_at(bootstrap_method_index).is_method_handle(),
3202 "bootstrap_method_index %u has bad constant type in class file %s",
3203 bootstrap_method_index,
3204 CHECK);
3205
3206 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3207 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3208 CHECK);
3209
3210 operands->at_put(operand_fill_index++, bootstrap_method_index);
3211 operands->at_put(operand_fill_index++, argument_count);
3212
3213 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3214 for (int j = 0; j < argument_count; j++) {
3215 const u2 argument_index = cfs->get_u2_fast();
3216 check_property(
3217 valid_cp_range(argument_index, cp_size) &&
3218 cp->tag_at(argument_index).is_loadable_constant(),
3219 "argument_index %u has bad constant type in class file %s",
3220 argument_index,
3221 CHECK);
3222 operands->at_put(operand_fill_index++, argument_index);
3223 }
3224 }
3225 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3226 "Bad length on BootstrapMethods in class file %s",
3227 CHECK);
3228 }
3229
3230 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3231 ConstantPool* cp,
3232 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3233 TRAPS) {
3234 assert(cfs != NULL, "invariant");
3235 assert(cp != NULL, "invariant");
3236 assert(parsed_annotations != NULL, "invariant");
3237
3238 // Set inner classes attribute to default sentinel
3239 _inner_classes = Universe::the_empty_short_array();
3240 cfs->guarantee_more(2, CHECK); // attributes_count
3241 u2 attributes_count = cfs->get_u2_fast();
3242 bool parsed_sourcefile_attribute = false;
3243 bool parsed_innerclasses_attribute = false;
3244 bool parsed_enclosingmethod_attribute = false;
3245 bool parsed_bootstrap_methods_attribute = false;
3246 bool signature_exists = false;
3247 const u1* runtime_visible_annotations = NULL;
3248 int runtime_visible_annotations_length = 0;
3249 const u1* runtime_invisible_annotations = NULL;
3250 int runtime_invisible_annotations_length = 0;
3251 const u1* runtime_visible_type_annotations = NULL;
3252 int runtime_visible_type_annotations_length = 0;
3253 const u1* runtime_invisible_type_annotations = NULL;
3254 int runtime_invisible_type_annotations_length = 0;
3255 bool runtime_invisible_type_annotations_exists = false;
3256 bool runtime_invisible_annotations_exists = false;
3257 bool parsed_source_debug_ext_annotations_exist = false;
3258 const u1* inner_classes_attribute_start = NULL;
3259 u4 inner_classes_attribute_length = 0;
3260 u2 enclosing_method_class_index = 0;
3261 u2 enclosing_method_method_index = 0;
3262 // Iterate over attributes
3263 while (attributes_count--) {
3264 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3265 const u2 attribute_name_index = cfs->get_u2_fast();
3266 const u4 attribute_length = cfs->get_u4_fast();
3267 check_property(
3268 valid_symbol_at(attribute_name_index),
3269 "Attribute name has bad constant pool index %u in class file %s",
3270 attribute_name_index, CHECK);
3271 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3272 if (tag == vmSymbols::tag_source_file()) {
3273 // Check for SourceFile tag
3274 if (_need_verify) {
3275 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3276 }
3277 if (parsed_sourcefile_attribute) {
3278 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3279 } else {
3280 parsed_sourcefile_attribute = true;
3281 }
3282 parse_classfile_sourcefile_attribute(cfs, CHECK);
3283 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3284 // Check for SourceDebugExtension tag
3285 if (parsed_source_debug_ext_annotations_exist) {
3286 classfile_parse_error(
3287 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3288 }
3289 parsed_source_debug_ext_annotations_exist = true;
3290 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3291 } else if (tag == vmSymbols::tag_inner_classes()) {
3292 // Check for InnerClasses tag
3293 if (parsed_innerclasses_attribute) {
3294 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3295 } else {
3296 parsed_innerclasses_attribute = true;
3297 }
3298 inner_classes_attribute_start = cfs->get_u1_buffer();
3299 inner_classes_attribute_length = attribute_length;
3300 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3301 } else if (tag == vmSymbols::tag_synthetic()) {
3302 // Check for Synthetic tag
3303 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3304 if (attribute_length != 0) {
3305 classfile_parse_error(
3306 "Invalid Synthetic classfile attribute length %u in class file %s",
3307 attribute_length, CHECK);
3308 }
3309 parse_classfile_synthetic_attribute(CHECK);
3310 } else if (tag == vmSymbols::tag_deprecated()) {
3311 // Check for Deprecatd tag - 4276120
3312 if (attribute_length != 0) {
3313 classfile_parse_error(
3314 "Invalid Deprecated classfile attribute length %u in class file %s",
3315 attribute_length, CHECK);
3316 }
3317 } else if (_major_version >= JAVA_1_5_VERSION) {
3318 if (tag == vmSymbols::tag_signature()) {
3319 if (signature_exists) {
3320 classfile_parse_error(
3321 "Multiple Signature attributes in class file %s", CHECK);
3322 }
3323 if (attribute_length != 2) {
3324 classfile_parse_error(
3325 "Wrong Signature attribute length %u in class file %s",
3326 attribute_length, CHECK);
3327 }
3328 signature_exists = true;
3329 parse_classfile_signature_attribute(cfs, CHECK);
3330 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3331 if (runtime_visible_annotations != NULL) {
3332 classfile_parse_error(
3333 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3334 }
3335 runtime_visible_annotations_length = attribute_length;
3336 runtime_visible_annotations = cfs->get_u1_buffer();
3337 assert(runtime_visible_annotations != NULL, "null visible annotations");
3338 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3339 parse_annotations(cp,
3340 runtime_visible_annotations,
3341 runtime_visible_annotations_length,
3342 parsed_annotations,
3343 _loader_data,
3344 CHECK);
3345 cfs->skip_u1_fast(runtime_visible_annotations_length);
3346 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3347 if (runtime_invisible_annotations_exists) {
3348 classfile_parse_error(
3349 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3350 }
3351 runtime_invisible_annotations_exists = true;
3352 if (PreserveAllAnnotations) {
3353 runtime_invisible_annotations_length = attribute_length;
3354 runtime_invisible_annotations = cfs->get_u1_buffer();
3355 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3356 }
3357 cfs->skip_u1(attribute_length, CHECK);
3358 } else if (tag == vmSymbols::tag_enclosing_method()) {
3359 if (parsed_enclosingmethod_attribute) {
3360 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3361 } else {
3362 parsed_enclosingmethod_attribute = true;
3363 }
3364 guarantee_property(attribute_length == 4,
3365 "Wrong EnclosingMethod attribute length %u in class file %s",
3366 attribute_length, CHECK);
3367 cfs->guarantee_more(4, CHECK); // class_index, method_index
3368 enclosing_method_class_index = cfs->get_u2_fast();
3369 enclosing_method_method_index = cfs->get_u2_fast();
3370 if (enclosing_method_class_index == 0) {
3371 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3372 }
3373 // Validate the constant pool indices and types
3374 check_property(valid_klass_reference_at(enclosing_method_class_index),
3375 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3376 if (enclosing_method_method_index != 0 &&
3377 (!cp->is_within_bounds(enclosing_method_method_index) ||
3378 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3379 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3380 }
3381 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3382 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3383 if (parsed_bootstrap_methods_attribute) {
3384 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3385 }
3386 parsed_bootstrap_methods_attribute = true;
3387 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3388 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3389 if (runtime_visible_type_annotations != NULL) {
3390 classfile_parse_error(
3391 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3392 }
3393 runtime_visible_type_annotations_length = attribute_length;
3394 runtime_visible_type_annotations = cfs->get_u1_buffer();
3395 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3396 // No need for the VM to parse Type annotations
3397 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3398 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3399 if (runtime_invisible_type_annotations_exists) {
3400 classfile_parse_error(
3401 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3402 } else {
3403 runtime_invisible_type_annotations_exists = true;
3404 }
3405 if (PreserveAllAnnotations) {
3406 runtime_invisible_type_annotations_length = attribute_length;
3407 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3408 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3409 }
3410 cfs->skip_u1(attribute_length, CHECK);
3411 } else {
3412 // Unknown attribute
3413 cfs->skip_u1(attribute_length, CHECK);
3414 }
3415 } else {
3416 // Unknown attribute
3417 cfs->skip_u1(attribute_length, CHECK);
3418 }
3419 }
3420 _annotations = assemble_annotations(runtime_visible_annotations,
3421 runtime_visible_annotations_length,
3422 runtime_invisible_annotations,
3423 runtime_invisible_annotations_length,
3424 CHECK);
3425 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3426 runtime_visible_type_annotations_length,
3427 runtime_invisible_type_annotations,
3428 runtime_invisible_type_annotations_length,
3429 CHECK);
3430
3431 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3432 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3433 cfs,
3434 inner_classes_attribute_start,
3435 parsed_innerclasses_attribute,
3436 enclosing_method_class_index,
3437 enclosing_method_method_index,
3438 CHECK);
3439 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3440 guarantee_property(
3441 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3442 "Wrong InnerClasses attribute length in class file %s", CHECK);
3443 }
3444 }
3445
3446 if (_max_bootstrap_specifier_index >= 0) {
3447 guarantee_property(parsed_bootstrap_methods_attribute,
3448 "Missing BootstrapMethods attribute in class file %s", CHECK);
3449 }
3450 }
3451
3452 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3453 assert(k != NULL, "invariant");
3454
3455 if (_synthetic_flag)
3456 k->set_is_synthetic();
3457 if (_sourcefile_index != 0) {
3458 k->set_source_file_name_index(_sourcefile_index);
3459 }
3460 if (_generic_signature_index != 0) {
3461 k->set_generic_signature_index(_generic_signature_index);
3462 }
3463 if (_sde_buffer != NULL) {
3464 k->set_source_debug_extension(_sde_buffer, _sde_length);
3465 }
3466 }
3467
3468 // Create the Annotations object that will
3469 // hold the annotations array for the Klass.
3470 void ClassFileParser::create_combined_annotations(TRAPS) {
3471 if (_annotations == NULL &&
3472 _type_annotations == NULL &&
3473 _fields_annotations == NULL &&
3474 _fields_type_annotations == NULL) {
3475 // Don't create the Annotations object unnecessarily.
3476 return;
3477 }
3478
3479 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3480 annotations->set_class_annotations(_annotations);
3481 annotations->set_class_type_annotations(_type_annotations);
3482 annotations->set_fields_annotations(_fields_annotations);
3483 annotations->set_fields_type_annotations(_fields_type_annotations);
3484
3485 // This is the Annotations object that will be
3486 // assigned to InstanceKlass being constructed.
3487 _combined_annotations = annotations;
3488
3489 // The annotations arrays below has been transfered the
3490 // _combined_annotations so these fields can now be cleared.
3491 _annotations = NULL;
3492 _type_annotations = NULL;
3493 _fields_annotations = NULL;
3494 _fields_type_annotations = NULL;
3495 }
3496
3497 // Transfer ownership of metadata allocated to the InstanceKlass.
3498 void ClassFileParser::apply_parsed_class_metadata(
3499 InstanceKlass* this_klass,
3500 int java_fields_count, TRAPS) {
3501 assert(this_klass != NULL, "invariant");
3502
3503 _cp->set_pool_holder(this_klass);
3504 this_klass->set_constants(_cp);
3505 this_klass->set_fields(_fields, java_fields_count);
3506 this_klass->set_methods(_methods);
3507 this_klass->set_inner_classes(_inner_classes);
3508 this_klass->set_local_interfaces(_local_interfaces);
3509 this_klass->set_transitive_interfaces(_transitive_interfaces);
3510 this_klass->set_annotations(_combined_annotations);
3511
3512 // Clear out these fields so they don't get deallocated by the destructor
3513 clear_class_metadata();
3514 }
3515
3516 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3517 int runtime_visible_annotations_length,
3518 const u1* const runtime_invisible_annotations,
3519 int runtime_invisible_annotations_length,
3520 TRAPS) {
3521 AnnotationArray* annotations = NULL;
3522 if (runtime_visible_annotations != NULL ||
3523 runtime_invisible_annotations != NULL) {
3524 annotations = MetadataFactory::new_array<u1>(_loader_data,
3525 runtime_visible_annotations_length +
3526 runtime_invisible_annotations_length,
3527 CHECK_(annotations));
3528 if (runtime_visible_annotations != NULL) {
3529 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3530 annotations->at_put(i, runtime_visible_annotations[i]);
3531 }
3532 }
3533 if (runtime_invisible_annotations != NULL) {
3534 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3535 int append = runtime_visible_annotations_length+i;
3536 annotations->at_put(append, runtime_invisible_annotations[i]);
3537 }
3538 }
3539 }
3540 return annotations;
3541 }
3542
3543 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3544 const int super_class_index,
3545 const bool need_verify,
3546 TRAPS) {
3547 assert(cp != NULL, "invariant");
3548 const InstanceKlass* super_klass = NULL;
3549
3550 if (super_class_index == 0) {
3551 check_property(_class_name == vmSymbols::java_lang_Object(),
3552 "Invalid superclass index %u in class file %s",
3553 super_class_index,
3554 CHECK_NULL);
3555 } else {
3556 check_property(valid_klass_reference_at(super_class_index),
3557 "Invalid superclass index %u in class file %s",
3558 super_class_index,
3559 CHECK_NULL);
3560 // The class name should be legal because it is checked when parsing constant pool.
3561 // However, make sure it is not an array type.
3562 bool is_array = false;
3563 if (cp->tag_at(super_class_index).is_klass()) {
3564 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3565 if (need_verify)
3566 is_array = super_klass->is_array_klass();
3567 } else if (need_verify) {
3568 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3569 }
3570 if (need_verify) {
3571 guarantee_property(!is_array,
3572 "Bad superclass name in class file %s", CHECK_NULL);
3573 }
3574 }
3575 return super_klass;
3576 }
3577
3578 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3579 unsigned int nonstatic_oop_map_count,
3580 int first_nonstatic_oop_offset) {
3581
3582 unsigned int map_count =
3583 NULL == super ? 0 : super->nonstatic_oop_map_count();
3584 if (nonstatic_oop_map_count > 0) {
3585 // We have oops to add to map
3586 if (map_count == 0) {
3587 map_count = nonstatic_oop_map_count;
3588 }
3589 else {
3590 // Check whether we should add a new map block or whether the last one can
3591 // be extended
3592 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3593 const OopMapBlock* const last_map = first_map + map_count - 1;
3594
3595 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3596 if (next_offset == first_nonstatic_oop_offset) {
3597 // There is no gap bettwen superklass's last oop field and first
3598 // local oop field, merge maps.
3599 nonstatic_oop_map_count -= 1;
3600 }
3601 else {
3602 // Superklass didn't end with a oop field, add extra maps
3603 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3604 }
3605 map_count += nonstatic_oop_map_count;
3606 }
3607 }
3608 return map_count;
3609 }
3610
3611 #ifndef PRODUCT
3612 static void print_field_layout(const Symbol* name,
3613 Array<u2>* fields,
3614 constantPoolHandle cp,
3615 int instance_size,
3616 int instance_fields_start,
3617 int instance_fields_end,
3618 int static_fields_end) {
3619
3620 assert(name != NULL, "invariant");
3621
3622 tty->print("%s: field layout\n", name->as_klass_external_name());
3623 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3624 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3625 if (!fs.access_flags().is_static()) {
3626 tty->print(" @%3d \"%s\" %s\n",
3627 fs.offset(),
3628 fs.name()->as_klass_external_name(),
3629 fs.signature()->as_klass_external_name());
3630 }
3631 }
3632 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3633 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3634 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3635 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3636 if (fs.access_flags().is_static()) {
3637 tty->print(" @%3d \"%s\" %s\n",
3638 fs.offset(),
3639 fs.name()->as_klass_external_name(),
3640 fs.signature()->as_klass_external_name());
3641 }
3642 }
3643 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3644 tty->print("\n");
3645 }
3646 #endif
3647
3648 // Values needed for oopmap and InstanceKlass creation
3649 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3650 public:
3651 int* nonstatic_oop_offsets;
3652 unsigned int* nonstatic_oop_counts;
3653 unsigned int nonstatic_oop_map_count;
3654 unsigned int total_oop_map_count;
3655 int instance_size;
3656 int nonstatic_field_size;
3657 int static_field_size;
3658 bool has_nonstatic_fields;
3659 };
3660
3661 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3662 void ClassFileParser::layout_fields(ConstantPool* cp,
3663 const FieldAllocationCount* fac,
3664 const ClassAnnotationCollector* parsed_annotations,
3665 FieldLayoutInfo* info,
3666 TRAPS) {
3667
3668 assert(cp != NULL, "invariant");
3669
3670 // Field size and offset computation
3671 int nonstatic_field_size = _super_klass == NULL ? 0 :
3672 _super_klass->nonstatic_field_size();
3673
3674 // Count the contended fields by type.
3675 //
3676 // We ignore static fields, because @Contended is not supported for them.
3677 // The layout code below will also ignore the static fields.
3678 int nonstatic_contended_count = 0;
3679 FieldAllocationCount fac_contended;
3680 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3681 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3682 if (fs.is_contended()) {
3683 fac_contended.count[atype]++;
3684 if (!fs.access_flags().is_static()) {
3685 nonstatic_contended_count++;
3686 }
3687 }
3688 }
3689
3690
3691 // Calculate the starting byte offsets
3692 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3693 int next_static_double_offset = next_static_oop_offset +
3694 ((fac->count[STATIC_OOP]) * heapOopSize);
3695 if ( fac->count[STATIC_DOUBLE] &&
3696 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3697 Universe::field_type_should_be_aligned(T_LONG)) ) {
3698 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3699 }
3700
3701 int next_static_word_offset = next_static_double_offset +
3702 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3703 int next_static_short_offset = next_static_word_offset +
3704 ((fac->count[STATIC_WORD]) * BytesPerInt);
3705 int next_static_byte_offset = next_static_short_offset +
3706 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3707
3708 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3709 nonstatic_field_size * heapOopSize;
3710
3711 int next_nonstatic_field_offset = nonstatic_fields_start;
3712
3713 const bool is_contended_class = parsed_annotations->is_contended();
3714
3715 // Class is contended, pad before all the fields
3716 if (is_contended_class) {
3717 next_nonstatic_field_offset += ContendedPaddingWidth;
3718 }
3719
3720 // Compute the non-contended fields count.
3721 // The packing code below relies on these counts to determine if some field
3722 // can be squeezed into the alignment gap. Contended fields are obviously
3723 // exempt from that.
3724 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3725 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3726 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3727 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3728 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3729
3730 // Total non-static fields count, including every contended field
3731 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3732 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3733 fac->count[NONSTATIC_OOP];
3734
3735 const bool super_has_nonstatic_fields =
3736 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3737 const bool has_nonstatic_fields =
3738 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3739
3740
3741 // Prepare list of oops for oop map generation.
3742 //
3743 // "offset" and "count" lists are describing the set of contiguous oop
3744 // regions. offset[i] is the start of the i-th region, which then has
3745 // count[i] oops following. Before we know how many regions are required,
3746 // we pessimistically allocate the maps to fit all the oops into the
3747 // distinct regions.
3748 //
3749 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3750 // to figure out if we still need to do this.
3751 unsigned int nonstatic_oop_map_count = 0;
3752 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3753
3754 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3755 THREAD, int, max_nonstatic_oop_maps);
3756 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3757 THREAD, unsigned int, max_nonstatic_oop_maps);
3758
3759 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3760
3761 bool compact_fields = CompactFields;
3762 int allocation_style = FieldsAllocationStyle;
3763 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3764 assert(false, "0 <= FieldsAllocationStyle <= 2");
3765 allocation_style = 1; // Optimistic
3766 }
3767
3768 // The next classes have predefined hard-coded fields offsets
3769 // (see in JavaClasses::compute_hard_coded_offsets()).
3770 // Use default fields allocation order for them.
3771 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3772 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3773 _class_name == vmSymbols::java_lang_Class() ||
3774 _class_name == vmSymbols::java_lang_ClassLoader() ||
3775 _class_name == vmSymbols::java_lang_ref_Reference() ||
3776 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3777 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3778 _class_name == vmSymbols::java_lang_String() ||
3779 _class_name == vmSymbols::java_lang_Throwable() ||
3780 _class_name == vmSymbols::java_lang_Boolean() ||
3781 _class_name == vmSymbols::java_lang_Character() ||
3782 _class_name == vmSymbols::java_lang_Float() ||
3783 _class_name == vmSymbols::java_lang_Double() ||
3784 _class_name == vmSymbols::java_lang_Byte() ||
3785 _class_name == vmSymbols::java_lang_Short() ||
3786 _class_name == vmSymbols::java_lang_Integer() ||
3787 _class_name == vmSymbols::java_lang_Long())) {
3788 allocation_style = 0; // Allocate oops first
3789 compact_fields = false; // Don't compact fields
3790 }
3791
3792 int next_nonstatic_oop_offset = 0;
3793 int next_nonstatic_double_offset = 0;
3794
3795 // Rearrange fields for a given allocation style
3796 if( allocation_style == 0 ) {
3797 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3798 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3799 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3800 (nonstatic_oop_count * heapOopSize);
3801 } else if( allocation_style == 1 ) {
3802 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3803 next_nonstatic_double_offset = next_nonstatic_field_offset;
3804 } else if( allocation_style == 2 ) {
3805 // Fields allocation: oops fields in super and sub classes are together.
3806 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3807 _super_klass->nonstatic_oop_map_size() > 0 ) {
3808 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3809 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3810 const OopMapBlock* const last_map = first_map + map_count - 1;
3811 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3812 if (next_offset == next_nonstatic_field_offset) {
3813 allocation_style = 0; // allocate oops first
3814 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3815 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3816 (nonstatic_oop_count * heapOopSize);
3817 }
3818 }
3819 if( allocation_style == 2 ) {
3820 allocation_style = 1; // allocate oops last
3821 next_nonstatic_double_offset = next_nonstatic_field_offset;
3822 }
3823 } else {
3824 ShouldNotReachHere();
3825 }
3826
3827 int nonstatic_oop_space_count = 0;
3828 int nonstatic_word_space_count = 0;
3829 int nonstatic_short_space_count = 0;
3830 int nonstatic_byte_space_count = 0;
3831 int nonstatic_oop_space_offset = 0;
3832 int nonstatic_word_space_offset = 0;
3833 int nonstatic_short_space_offset = 0;
3834 int nonstatic_byte_space_offset = 0;
3835
3836 // Try to squeeze some of the fields into the gaps due to
3837 // long/double alignment.
3838 if (nonstatic_double_count > 0) {
3839 int offset = next_nonstatic_double_offset;
3840 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3841 if (compact_fields && offset != next_nonstatic_double_offset) {
3842 // Allocate available fields into the gap before double field.
3843 int length = next_nonstatic_double_offset - offset;
3844 assert(length == BytesPerInt, "");
3845 nonstatic_word_space_offset = offset;
3846 if (nonstatic_word_count > 0) {
3847 nonstatic_word_count -= 1;
3848 nonstatic_word_space_count = 1; // Only one will fit
3849 length -= BytesPerInt;
3850 offset += BytesPerInt;
3851 }
3852 nonstatic_short_space_offset = offset;
3853 while (length >= BytesPerShort && nonstatic_short_count > 0) {
3854 nonstatic_short_count -= 1;
3855 nonstatic_short_space_count += 1;
3856 length -= BytesPerShort;
3857 offset += BytesPerShort;
3858 }
3859 nonstatic_byte_space_offset = offset;
3860 while (length > 0 && nonstatic_byte_count > 0) {
3861 nonstatic_byte_count -= 1;
3862 nonstatic_byte_space_count += 1;
3863 length -= 1;
3864 }
3865 // Allocate oop field in the gap if there are no other fields for that.
3866 nonstatic_oop_space_offset = offset;
3867 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3868 allocation_style != 0) { // when oop fields not first
3869 nonstatic_oop_count -= 1;
3870 nonstatic_oop_space_count = 1; // Only one will fit
3871 length -= heapOopSize;
3872 offset += heapOopSize;
3873 }
3874 }
3875 }
3876
3877 int next_nonstatic_word_offset = next_nonstatic_double_offset +
3878 (nonstatic_double_count * BytesPerLong);
3879 int next_nonstatic_short_offset = next_nonstatic_word_offset +
3880 (nonstatic_word_count * BytesPerInt);
3881 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3882 (nonstatic_short_count * BytesPerShort);
3883 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3884 nonstatic_byte_count;
3885
3886 // let oops jump before padding with this allocation style
3887 if( allocation_style == 1 ) {
3888 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3889 if( nonstatic_oop_count > 0 ) {
3890 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3891 }
3892 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3893 }
3894
3895 // Iterate over fields again and compute correct offsets.
3896 // The field allocation type was temporarily stored in the offset slot.
3897 // oop fields are located before non-oop fields (static and non-static).
3898 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3899
3900 // skip already laid out fields
3901 if (fs.is_offset_set()) continue;
3902
3903 // contended instance fields are handled below
3904 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3905
3906 int real_offset = 0;
3907 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3908
3909 // pack the rest of the fields
3910 switch (atype) {
3911 case STATIC_OOP:
3912 real_offset = next_static_oop_offset;
3913 next_static_oop_offset += heapOopSize;
3914 break;
3915 case STATIC_BYTE:
3916 real_offset = next_static_byte_offset;
3917 next_static_byte_offset += 1;
3918 break;
3919 case STATIC_SHORT:
3920 real_offset = next_static_short_offset;
3921 next_static_short_offset += BytesPerShort;
3922 break;
3923 case STATIC_WORD:
3924 real_offset = next_static_word_offset;
3925 next_static_word_offset += BytesPerInt;
3926 break;
3927 case STATIC_DOUBLE:
3928 real_offset = next_static_double_offset;
3929 next_static_double_offset += BytesPerLong;
3930 break;
3931 case NONSTATIC_OOP:
3932 if( nonstatic_oop_space_count > 0 ) {
3933 real_offset = nonstatic_oop_space_offset;
3934 nonstatic_oop_space_offset += heapOopSize;
3935 nonstatic_oop_space_count -= 1;
3936 } else {
3937 real_offset = next_nonstatic_oop_offset;
3938 next_nonstatic_oop_offset += heapOopSize;
3939 }
3940
3941 // Record this oop in the oop maps
3942 if( nonstatic_oop_map_count > 0 &&
3943 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3944 real_offset -
3945 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3946 heapOopSize ) {
3947 // This oop is adjacent to the previous one, add to current oop map
3948 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3949 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3950 } else {
3951 // This oop is not adjacent to the previous one, create new oop map
3952 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3953 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3954 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3955 nonstatic_oop_map_count += 1;
3956 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3957 first_nonstatic_oop_offset = real_offset;
3958 }
3959 }
3960 break;
3961 case NONSTATIC_BYTE:
3962 if( nonstatic_byte_space_count > 0 ) {
3963 real_offset = nonstatic_byte_space_offset;
3964 nonstatic_byte_space_offset += 1;
3965 nonstatic_byte_space_count -= 1;
3966 } else {
3967 real_offset = next_nonstatic_byte_offset;
3968 next_nonstatic_byte_offset += 1;
3969 }
3970 break;
3971 case NONSTATIC_SHORT:
3972 if( nonstatic_short_space_count > 0 ) {
3973 real_offset = nonstatic_short_space_offset;
3974 nonstatic_short_space_offset += BytesPerShort;
3975 nonstatic_short_space_count -= 1;
3976 } else {
3977 real_offset = next_nonstatic_short_offset;
3978 next_nonstatic_short_offset += BytesPerShort;
3979 }
3980 break;
3981 case NONSTATIC_WORD:
3982 if( nonstatic_word_space_count > 0 ) {
3983 real_offset = nonstatic_word_space_offset;
3984 nonstatic_word_space_offset += BytesPerInt;
3985 nonstatic_word_space_count -= 1;
3986 } else {
3987 real_offset = next_nonstatic_word_offset;
3988 next_nonstatic_word_offset += BytesPerInt;
3989 }
3990 break;
3991 case NONSTATIC_DOUBLE:
3992 real_offset = next_nonstatic_double_offset;
3993 next_nonstatic_double_offset += BytesPerLong;
3994 break;
3995 default:
3996 ShouldNotReachHere();
3997 }
3998 fs.set_offset(real_offset);
3999 }
4000
4001
4002 // Handle the contended cases.
4003 //
4004 // Each contended field should not intersect the cache line with another contended field.
4005 // In the absence of alignment information, we end up with pessimistically separating
4006 // the fields with full-width padding.
4007 //
4008 // Additionally, this should not break alignment for the fields, so we round the alignment up
4009 // for each field.
4010 if (nonstatic_contended_count > 0) {
4011
4012 // if there is at least one contended field, we need to have pre-padding for them
4013 next_nonstatic_padded_offset += ContendedPaddingWidth;
4014
4015 // collect all contended groups
4016 ResourceBitMap bm(cp->size());
4017 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4018 // skip already laid out fields
4019 if (fs.is_offset_set()) continue;
4020
4021 if (fs.is_contended()) {
4022 bm.set_bit(fs.contended_group());
4023 }
4024 }
4025
4026 int current_group = -1;
4027 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4028
4029 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4030
4031 // skip already laid out fields
4032 if (fs.is_offset_set()) continue;
4033
4034 // skip non-contended fields and fields from different group
4035 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4036
4037 // handle statics below
4038 if (fs.access_flags().is_static()) continue;
4039
4040 int real_offset = 0;
4041 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4042
4043 switch (atype) {
4044 case NONSTATIC_BYTE:
4045 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
4046 real_offset = next_nonstatic_padded_offset;
4047 next_nonstatic_padded_offset += 1;
4048 break;
4049
4050 case NONSTATIC_SHORT:
4051 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
4052 real_offset = next_nonstatic_padded_offset;
4053 next_nonstatic_padded_offset += BytesPerShort;
4054 break;
4055
4056 case NONSTATIC_WORD:
4057 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4058 real_offset = next_nonstatic_padded_offset;
4059 next_nonstatic_padded_offset += BytesPerInt;
4060 break;
4061
4062 case NONSTATIC_DOUBLE:
4063 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4064 real_offset = next_nonstatic_padded_offset;
4065 next_nonstatic_padded_offset += BytesPerLong;
4066 break;
4067
4068 case NONSTATIC_OOP:
4069 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4070 real_offset = next_nonstatic_padded_offset;
4071 next_nonstatic_padded_offset += heapOopSize;
4072
4073 // Record this oop in the oop maps
4074 if( nonstatic_oop_map_count > 0 &&
4075 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4076 real_offset -
4077 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4078 heapOopSize ) {
4079 // This oop is adjacent to the previous one, add to current oop map
4080 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4081 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4082 } else {
4083 // This oop is not adjacent to the previous one, create new oop map
4084 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4085 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4086 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4087 nonstatic_oop_map_count += 1;
4088 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4089 first_nonstatic_oop_offset = real_offset;
4090 }
4091 }
4092 break;
4093
4094 default:
4095 ShouldNotReachHere();
4096 }
4097
4098 if (fs.contended_group() == 0) {
4099 // Contended group defines the equivalence class over the fields:
4100 // the fields within the same contended group are not inter-padded.
4101 // The only exception is default group, which does not incur the
4102 // equivalence, and so requires intra-padding.
4103 next_nonstatic_padded_offset += ContendedPaddingWidth;
4104 }
4105
4106 fs.set_offset(real_offset);
4107 } // for
4108
4109 // Start laying out the next group.
4110 // Note that this will effectively pad the last group in the back;
4111 // this is expected to alleviate memory contention effects for
4112 // subclass fields and/or adjacent object.
4113 // If this was the default group, the padding is already in place.
4114 if (current_group != 0) {
4115 next_nonstatic_padded_offset += ContendedPaddingWidth;
4116 }
4117 }
4118
4119 // handle static fields
4120 }
4121
4122 // Entire class is contended, pad in the back.
4123 // This helps to alleviate memory contention effects for subclass fields
4124 // and/or adjacent object.
4125 if (is_contended_class) {
4126 next_nonstatic_padded_offset += ContendedPaddingWidth;
4127 }
4128
4129 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4130
4131 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
4132 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4133 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
4134
4135 int static_field_size = (static_fields_end -
4136 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4137 nonstatic_field_size = nonstatic_field_size +
4138 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4139
4140 int instance_size = align_object_size(instance_end / wordSize);
4141
4142 assert(instance_size == align_object_size(align_size_up(
4143 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4144 wordSize) / wordSize), "consistent layout helper value");
4145
4146 // Invariant: nonstatic_field end/start should only change if there are
4147 // nonstatic fields in the class, or if the class is contended. We compare
4148 // against the non-aligned value, so that end alignment will not fail the
4149 // assert without actually having the fields.
4150 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4151 is_contended_class ||
4152 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4153
4154 // Number of non-static oop map blocks allocated at end of klass.
4155 const unsigned int total_oop_map_count =
4156 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4157 first_nonstatic_oop_offset);
4158
4159 #ifndef PRODUCT
4160 if (PrintFieldLayout) {
4161 print_field_layout(_class_name,
4162 _fields,
4163 cp,
4164 instance_size,
4165 nonstatic_fields_start,
4166 nonstatic_fields_end,
4167 static_fields_end);
4168 }
4169
4170 #endif
4171 // Pass back information needed for InstanceKlass creation
4172 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4173 info->nonstatic_oop_counts = nonstatic_oop_counts;
4174 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4175 info->total_oop_map_count = total_oop_map_count;
4176 info->instance_size = instance_size;
4177 info->static_field_size = static_field_size;
4178 info->nonstatic_field_size = nonstatic_field_size;
4179 info->has_nonstatic_fields = has_nonstatic_fields;
4180 }
4181
4182 static void fill_oop_maps(const InstanceKlass* k,
4183 unsigned int nonstatic_oop_map_count,
4184 const int* nonstatic_oop_offsets,
4185 const unsigned int* nonstatic_oop_counts) {
4186
4187 assert(k != NULL, "invariant");
4188
4189 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4190 const InstanceKlass* const super = k->superklass();
4191 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4192 if (super_count > 0) {
4193 // Copy maps from superklass
4194 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4195 for (unsigned int i = 0; i < super_count; ++i) {
4196 *this_oop_map++ = *super_oop_map++;
4197 }
4198 }
4199
4200 if (nonstatic_oop_map_count > 0) {
4201 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4202 // The counts differ because there is no gap between superklass's last oop
4203 // field and the first local oop field. Extend the last oop map copied
4204 // from the superklass instead of creating new one.
4205 nonstatic_oop_map_count--;
4206 nonstatic_oop_offsets++;
4207 this_oop_map--;
4208 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4209 this_oop_map++;
4210 }
4211
4212 // Add new map blocks, fill them
4213 while (nonstatic_oop_map_count-- > 0) {
4214 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4215 this_oop_map->set_count(*nonstatic_oop_counts++);
4216 this_oop_map++;
4217 }
4218 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4219 this_oop_map, "sanity");
4220 }
4221 }
4222
4223
4224 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4225 assert(ik != NULL, "invariant");
4226
4227 const Klass* const super = ik->super();
4228
4229 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4230 // in which case we don't have to register objects as finalizable
4231 if (!_has_empty_finalizer) {
4232 if (_has_finalizer ||
4233 (super != NULL && super->has_finalizer())) {
4234 ik->set_has_finalizer();
4235 }
4236 }
4237
4238 #ifdef ASSERT
4239 bool f = false;
4240 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4241 vmSymbols::void_method_signature());
4242 if (m != NULL && !m->is_empty_method()) {
4243 f = true;
4244 }
4245
4246 // Spec doesn't prevent agent from redefinition of empty finalizer.
4247 // Despite the fact that it's generally bad idea and redefined finalizer
4248 // will not work as expected we shouldn't abort vm in this case
4249 if (!ik->has_redefined_this_or_super()) {
4250 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4251 }
4252 #endif
4253
4254 // Check if this klass supports the java.lang.Cloneable interface
4255 if (SystemDictionary::Cloneable_klass_loaded()) {
4256 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4257 ik->set_is_cloneable();
4258 }
4259 }
4260
4261 // Check if this klass has a vanilla default constructor
4262 if (super == NULL) {
4263 // java.lang.Object has empty default constructor
4264 ik->set_has_vanilla_constructor();
4265 } else {
4266 if (super->has_vanilla_constructor() &&
4267 _has_vanilla_constructor) {
4268 ik->set_has_vanilla_constructor();
4269 }
4270 #ifdef ASSERT
4271 bool v = false;
4272 if (super->has_vanilla_constructor()) {
4273 const Method* const constructor =
4274 ik->find_method(vmSymbols::object_initializer_name(),
4275 vmSymbols::void_method_signature());
4276 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4277 v = true;
4278 }
4279 }
4280 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4281 #endif
4282 }
4283
4284 // If it cannot be fast-path allocated, set a bit in the layout helper.
4285 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4286 assert(ik->size_helper() > 0, "layout_helper is initialized");
4287 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4288 || ik->is_abstract() || ik->is_interface()
4289 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4290 || ik->size_helper() >= FastAllocateSizeLimit) {
4291 // Forbid fast-path allocation.
4292 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4293 ik->set_layout_helper(lh);
4294 }
4295 }
4296
4297 // Attach super classes and interface classes to class loader data
4298 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4299 TRAPS) {
4300 assert(defined_klass != NULL, "invariant");
4301
4302 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4303 if (defining_loader_data->is_the_null_class_loader_data()) {
4304 // Dependencies to null class loader data are implicit.
4305 return;
4306 } else {
4307 // add super class dependency
4308 Klass* const super = defined_klass->super();
4309 if (super != NULL) {
4310 defining_loader_data->record_dependency(super, CHECK);
4311 }
4312
4313 // add super interface dependencies
4314 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4315 if (local_interfaces != NULL) {
4316 const int length = local_interfaces->length();
4317 for (int i = 0; i < length; i++) {
4318 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4319 }
4320 }
4321 }
4322 }
4323
4324 // utility methods for appending an array with check for duplicates
4325
4326 static void append_interfaces(GrowableArray<Klass*>* result,
4327 const Array<Klass*>* const ifs) {
4328 // iterate over new interfaces
4329 for (int i = 0; i < ifs->length(); i++) {
4330 Klass* const e = ifs->at(i);
4331 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4332 // add new interface
4333 result->append_if_missing(e);
4334 }
4335 }
4336
4337 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4338 Array<Klass*>* local_ifs,
4339 ClassLoaderData* loader_data,
4340 TRAPS) {
4341 assert(local_ifs != NULL, "invariant");
4342 assert(loader_data != NULL, "invariant");
4343
4344 // Compute maximum size for transitive interfaces
4345 int max_transitive_size = 0;
4346 int super_size = 0;
4347 // Add superclass transitive interfaces size
4348 if (super != NULL) {
4349 super_size = super->transitive_interfaces()->length();
4350 max_transitive_size += super_size;
4351 }
4352 // Add local interfaces' super interfaces
4353 const int local_size = local_ifs->length();
4354 for (int i = 0; i < local_size; i++) {
4355 Klass* const l = local_ifs->at(i);
4356 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4357 }
4358 // Finally add local interfaces
4359 max_transitive_size += local_size;
4360 // Construct array
4361 if (max_transitive_size == 0) {
4362 // no interfaces, use canonicalized array
4363 return Universe::the_empty_klass_array();
4364 } else if (max_transitive_size == super_size) {
4365 // no new local interfaces added, share superklass' transitive interface array
4366 return super->transitive_interfaces();
4367 } else if (max_transitive_size == local_size) {
4368 // only local interfaces added, share local interface array
4369 return local_ifs;
4370 } else {
4371 ResourceMark rm;
4372 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4373
4374 // Copy down from superclass
4375 if (super != NULL) {
4376 append_interfaces(result, super->transitive_interfaces());
4377 }
4378
4379 // Copy down from local interfaces' superinterfaces
4380 for (int i = 0; i < local_size; i++) {
4381 Klass* const l = local_ifs->at(i);
4382 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4383 }
4384 // Finally add local interfaces
4385 append_interfaces(result, local_ifs);
4386
4387 // length will be less than the max_transitive_size if duplicates were removed
4388 const int length = result->length();
4389 assert(length <= max_transitive_size, "just checking");
4390 Array<Klass*>* const new_result =
4391 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4392 for (int i = 0; i < length; i++) {
4393 Klass* const e = result->at(i);
4394 assert(e != NULL, "just checking");
4395 new_result->at_put(i, e);
4396 }
4397 return new_result;
4398 }
4399 }
4400
4401 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4402 assert(this_klass != NULL, "invariant");
4403 const Klass* const super = this_klass->super();
4404 if (super != NULL) {
4405
4406 // If the loader is not the boot loader then throw an exception if its
4407 // superclass is in package jdk.internal.reflect and its loader is not a
4408 // special reflection class loader
4409 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4410 assert(super->is_instance_klass(), "super is not instance klass");
4411 PackageEntry* super_package = super->package();
4412 if (super_package != NULL &&
4413 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4414 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4415 ResourceMark rm(THREAD);
4416 Exceptions::fthrow(
4417 THREAD_AND_LOCATION,
4418 vmSymbols::java_lang_IllegalAccessError(),
4419 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4420 this_klass->external_name(),
4421 this_klass->class_loader_data()->loader_name(),
4422 super->external_name());
4423 return;
4424 }
4425 }
4426
4427 Reflection::VerifyClassAccessResults vca_result =
4428 Reflection::verify_class_access(this_klass, super, false);
4429 if (vca_result != Reflection::ACCESS_OK) {
4430 ResourceMark rm(THREAD);
4431 char* msg = Reflection::verify_class_access_msg(this_klass, super, vca_result);
4432 if (msg == NULL) {
4433 Exceptions::fthrow(
4434 THREAD_AND_LOCATION,
4435 vmSymbols::java_lang_IllegalAccessError(),
4436 "class %s cannot access its superclass %s",
4437 this_klass->external_name(),
4438 super->external_name());
4439 } else {
4440 // Add additional message content.
4441 Exceptions::fthrow(
4442 THREAD_AND_LOCATION,
4443 vmSymbols::java_lang_IllegalAccessError(),
4444 "superclass access check failed: %s",
4445 msg);
4446 }
4447 }
4448 }
4449 }
4450
4451
4452 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4453 assert(this_klass != NULL, "invariant");
4454 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4455 const int lng = local_interfaces->length();
4456 for (int i = lng - 1; i >= 0; i--) {
4457 Klass* const k = local_interfaces->at(i);
4458 assert (k != NULL && k->is_interface(), "invalid interface");
4459 Reflection::VerifyClassAccessResults vca_result =
4460 Reflection::verify_class_access(this_klass, k, false);
4461 if (vca_result != Reflection::ACCESS_OK) {
4462 ResourceMark rm(THREAD);
4463 char* msg = Reflection::verify_class_access_msg(this_klass, k, vca_result);
4464 if (msg == NULL) {
4465 Exceptions::fthrow(
4466 THREAD_AND_LOCATION,
4467 vmSymbols::java_lang_IllegalAccessError(),
4468 "class %s cannot access its superinterface %s",
4469 this_klass->external_name(),
4470 k->external_name());
4471 } else {
4472 // Add additional message content.
4473 Exceptions::fthrow(
4474 THREAD_AND_LOCATION,
4475 vmSymbols::java_lang_IllegalAccessError(),
4476 "superinterface check failed: %s",
4477 msg);
4478 }
4479 }
4480 }
4481 }
4482
4483
4484 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4485 assert(this_klass != NULL, "invariant");
4486 const Array<Method*>* const methods = this_klass->methods();
4487 const int num_methods = methods->length();
4488
4489 // go thru each method and check if it overrides a final method
4490 for (int index = 0; index < num_methods; index++) {
4491 const Method* const m = methods->at(index);
4492
4493 // skip private, static, and <init> methods
4494 if ((!m->is_private() && !m->is_static()) &&
4495 (m->name() != vmSymbols::object_initializer_name())) {
4496
4497 const Symbol* const name = m->name();
4498 const Symbol* const signature = m->signature();
4499 const Klass* k = this_klass->super();
4500 const Method* super_m = NULL;
4501 while (k != NULL) {
4502 // skip supers that don't have final methods.
4503 if (k->has_final_method()) {
4504 // lookup a matching method in the super class hierarchy
4505 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4506 if (super_m == NULL) {
4507 break; // didn't find any match; get out
4508 }
4509
4510 if (super_m->is_final() && !super_m->is_static() &&
4511 // matching method in super is final, and not static
4512 (Reflection::verify_field_access(this_klass,
4513 super_m->method_holder(),
4514 super_m->method_holder(),
4515 super_m->access_flags(), false))
4516 // this class can access super final method and therefore override
4517 ) {
4518 ResourceMark rm(THREAD);
4519 Exceptions::fthrow(
4520 THREAD_AND_LOCATION,
4521 vmSymbols::java_lang_VerifyError(),
4522 "class %s overrides final method %s.%s%s",
4523 this_klass->external_name(),
4524 super_m->method_holder()->external_name(),
4525 name->as_C_string(),
4526 signature->as_C_string()
4527 );
4528 return;
4529 }
4530
4531 // continue to look from super_m's holder's super.
4532 k = super_m->method_holder()->super();
4533 continue;
4534 }
4535
4536 k = k->super();
4537 }
4538 }
4539 }
4540 }
4541
4542
4543 // assumes that this_klass is an interface
4544 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4545 assert(this_klass != NULL, "invariant");
4546 assert(this_klass->is_interface(), "not an interface");
4547 const Array<Method*>* methods = this_klass->methods();
4548 const int num_methods = methods->length();
4549
4550 for (int index = 0; index < num_methods; index++) {
4551 const Method* const m = methods->at(index);
4552 // if m is static and not the init method, throw a verify error
4553 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4554 ResourceMark rm(THREAD);
4555 Exceptions::fthrow(
4556 THREAD_AND_LOCATION,
4557 vmSymbols::java_lang_VerifyError(),
4558 "Illegal static method %s in interface %s",
4559 m->name()->as_C_string(),
4560 this_klass->external_name()
4561 );
4562 return;
4563 }
4564 }
4565 }
4566
4567 // utility methods for format checking
4568
4569 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4570 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4571 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4572 if (is_module) {
4573 ResourceMark rm(THREAD);
4574 Exceptions::fthrow(
4575 THREAD_AND_LOCATION,
4576 vmSymbols::java_lang_NoClassDefFoundError(),
4577 "%s is not a class because access_flag ACC_MODULE is set",
4578 _class_name->as_C_string());
4579 return;
4580 }
4581
4582 if (!_need_verify) { return; }
4583
4584 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4585 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4586 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4587 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4588 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4589 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4590 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4591
4592 if ((is_abstract && is_final) ||
4593 (is_interface && !is_abstract) ||
4594 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4595 (!is_interface && major_gte_15 && is_annotation)) {
4596 ResourceMark rm(THREAD);
4597 Exceptions::fthrow(
4598 THREAD_AND_LOCATION,
4599 vmSymbols::java_lang_ClassFormatError(),
4600 "Illegal class modifiers in class %s: 0x%X",
4601 _class_name->as_C_string(), flags
4602 );
4603 return;
4604 }
4605 }
4606
4607 static bool has_illegal_visibility(jint flags) {
4608 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4609 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4610 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4611
4612 return ((is_public && is_protected) ||
4613 (is_public && is_private) ||
4614 (is_protected && is_private));
4615 }
4616
4617 static bool is_supported_version(u2 major, u2 minor){
4618 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4619 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4620 (major <= max_version) &&
4621 ((major != max_version) ||
4622 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4623 }
4624
4625 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4626 bool is_interface,
4627 TRAPS) const {
4628 if (!_need_verify) { return; }
4629
4630 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4631 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4632 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4633 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4634 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4635 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4636 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4637 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4638 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4639
4640 bool is_illegal = false;
4641
4642 if (is_interface) {
4643 if (!is_public || !is_static || !is_final || is_private ||
4644 is_protected || is_volatile || is_transient ||
4645 (major_gte_15 && is_enum)) {
4646 is_illegal = true;
4647 }
4648 } else { // not interface
4649 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4650 is_illegal = true;
4651 }
4652 }
4653
4654 if (is_illegal) {
4655 ResourceMark rm(THREAD);
4656 Exceptions::fthrow(
4657 THREAD_AND_LOCATION,
4658 vmSymbols::java_lang_ClassFormatError(),
4659 "Illegal field modifiers in class %s: 0x%X",
4660 _class_name->as_C_string(), flags);
4661 return;
4662 }
4663 }
4664
4665 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4666 bool is_interface,
4667 const Symbol* name,
4668 TRAPS) const {
4669 if (!_need_verify) { return; }
4670
4671 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4672 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4673 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4674 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4675 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4676 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4677 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4678 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4679 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4680 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4681 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4682 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4683 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4684
4685 bool is_illegal = false;
4686
4687 if (is_interface) {
4688 if (major_gte_8) {
4689 // Class file version is JAVA_8_VERSION or later Methods of
4690 // interfaces may set any of the flags except ACC_PROTECTED,
4691 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4692 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4693 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4694 (is_native || is_protected || is_final || is_synchronized) ||
4695 // If a specific method of a class or interface has its
4696 // ACC_ABSTRACT flag set, it must not have any of its
4697 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4698 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4699 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4700 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4701 (is_abstract && (is_private || is_static || is_strict))) {
4702 is_illegal = true;
4703 }
4704 } else if (major_gte_15) {
4705 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4706 if (!is_public || is_private || is_protected || is_static || is_final ||
4707 is_synchronized || is_native || !is_abstract || is_strict) {
4708 is_illegal = true;
4709 }
4710 } else {
4711 // Class file version is pre-JAVA_1_5_VERSION
4712 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4713 is_illegal = true;
4714 }
4715 }
4716 } else { // not interface
4717 if (has_illegal_visibility(flags)) {
4718 is_illegal = true;
4719 } else {
4720 if (is_initializer) {
4721 if (is_static || is_final || is_synchronized || is_native ||
4722 is_abstract || (major_gte_15 && is_bridge)) {
4723 is_illegal = true;
4724 }
4725 } else { // not initializer
4726 if (is_abstract) {
4727 if ((is_final || is_native || is_private || is_static ||
4728 (major_gte_15 && (is_synchronized || is_strict)))) {
4729 is_illegal = true;
4730 }
4731 }
4732 }
4733 }
4734 }
4735
4736 if (is_illegal) {
4737 ResourceMark rm(THREAD);
4738 Exceptions::fthrow(
4739 THREAD_AND_LOCATION,
4740 vmSymbols::java_lang_ClassFormatError(),
4741 "Method %s in class %s has illegal modifiers: 0x%X",
4742 name->as_C_string(), _class_name->as_C_string(), flags);
4743 return;
4744 }
4745 }
4746
4747 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4748 int length,
4749 TRAPS) const {
4750 assert(_need_verify, "only called when _need_verify is true");
4751 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4752 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4753 }
4754 }
4755
4756 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4757 // In class names, '/' separates unqualified names. This is verified in this function also.
4758 // Method names also may not contain the characters '<' or '>', unless <init>
4759 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4760 // method. Because these names have been checked as special cases before
4761 // calling this method in verify_legal_method_name.
4762 //
4763 // This method is also called from the modular system APIs in modules.cpp
4764 // to verify the validity of module and package names.
4765 bool ClassFileParser::verify_unqualified_name(const char* name,
4766 unsigned int length,
4767 int type) {
4768 for (const char* p = name; p != name + length;) {
4769 jchar ch = *p;
4770 if (ch < 128) {
4771 if (ch == '.' || ch == ';' || ch == '[' ) {
4772 return false; // do not permit '.', ';', or '['
4773 }
4774 if (ch == '/') {
4775 // check for '//' or leading or trailing '/' which are not legal
4776 // unqualified name must not be empty
4777 if (type == ClassFileParser::LegalClass) {
4778 if (p == name || p+1 >= name+length || *(p+1) == '/') {
4779 return false;
4780 }
4781 } else {
4782 return false; // do not permit '/' unless it's class name
4783 }
4784 }
4785 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
4786 return false; // do not permit '<' or '>' in method names
4787 }
4788 p++;
4789 } else {
4790 char* tmp_p = UTF8::next(p, &ch);
4791 p = tmp_p;
4792 }
4793 }
4794 return true;
4795 }
4796
4797 // Take pointer to a string. Skip over the longest part of the string that could
4798 // be taken as a fieldname. Allow '/' if slash_ok is true.
4799 // Return a pointer to just past the fieldname.
4800 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4801 // being true, we saw consecutive slashes (meaning we were looking for a
4802 // qualified path but found something that was badly-formed).
4803 static const char* skip_over_field_name(const char* name,
4804 bool slash_ok,
4805 unsigned int length) {
4806 const char* p;
4807 jboolean last_is_slash = false;
4808 jboolean not_first_ch = false;
4809
4810 for (p = name; p != name + length; not_first_ch = true) {
4811 const char* old_p = p;
4812 jchar ch = *p;
4813 if (ch < 128) {
4814 p++;
4815 // quick check for ascii
4816 if ((ch >= 'a' && ch <= 'z') ||
4817 (ch >= 'A' && ch <= 'Z') ||
4818 (ch == '_' || ch == '$') ||
4819 (not_first_ch && ch >= '0' && ch <= '9')) {
4820 last_is_slash = false;
4821 continue;
4822 }
4823 if (slash_ok && ch == '/') {
4824 if (last_is_slash) {
4825 return NULL; // Don't permit consecutive slashes
4826 }
4827 last_is_slash = true;
4828 continue;
4829 }
4830 }
4831 else {
4832 jint unicode_ch;
4833 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4834 p = tmp_p;
4835 last_is_slash = false;
4836 // Check if ch is Java identifier start or is Java identifier part
4837 // 4672820: call java.lang.Character methods directly without generating separate tables.
4838 EXCEPTION_MARK;
4839
4840 // return value
4841 JavaValue result(T_BOOLEAN);
4842 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4843 JavaCallArguments args;
4844 args.push_int(unicode_ch);
4845
4846 // public static boolean isJavaIdentifierStart(char ch);
4847 JavaCalls::call_static(&result,
4848 SystemDictionary::Character_klass(),
4849 vmSymbols::isJavaIdentifierStart_name(),
4850 vmSymbols::int_bool_signature(),
4851 &args,
4852 THREAD);
4853
4854 if (HAS_PENDING_EXCEPTION) {
4855 CLEAR_PENDING_EXCEPTION;
4856 return 0;
4857 }
4858 if (result.get_jboolean()) {
4859 continue;
4860 }
4861
4862 if (not_first_ch) {
4863 // public static boolean isJavaIdentifierPart(char ch);
4864 JavaCalls::call_static(&result,
4865 SystemDictionary::Character_klass(),
4866 vmSymbols::isJavaIdentifierPart_name(),
4867 vmSymbols::int_bool_signature(),
4868 &args,
4869 THREAD);
4870
4871 if (HAS_PENDING_EXCEPTION) {
4872 CLEAR_PENDING_EXCEPTION;
4873 return 0;
4874 }
4875
4876 if (result.get_jboolean()) {
4877 continue;
4878 }
4879 }
4880 }
4881 return (not_first_ch) ? old_p : NULL;
4882 }
4883 return (not_first_ch) ? p : NULL;
4884 }
4885
4886 // Take pointer to a string. Skip over the longest part of the string that could
4887 // be taken as a field signature. Allow "void" if void_ok.
4888 // Return a pointer to just past the signature.
4889 // Return NULL if no legal signature is found.
4890 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4891 bool void_ok,
4892 unsigned int length,
4893 TRAPS) const {
4894 unsigned int array_dim = 0;
4895 while (length > 0) {
4896 switch (signature[0]) {
4897 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4898 case JVM_SIGNATURE_BOOLEAN:
4899 case JVM_SIGNATURE_BYTE:
4900 case JVM_SIGNATURE_CHAR:
4901 case JVM_SIGNATURE_SHORT:
4902 case JVM_SIGNATURE_INT:
4903 case JVM_SIGNATURE_FLOAT:
4904 case JVM_SIGNATURE_LONG:
4905 case JVM_SIGNATURE_DOUBLE:
4906 return signature + 1;
4907 case JVM_SIGNATURE_CLASS: {
4908 if (_major_version < JAVA_1_5_VERSION) {
4909 // Skip over the class name if one is there
4910 const char* const p = skip_over_field_name(signature + 1, true, --length);
4911
4912 // The next character better be a semicolon
4913 if (p && (p - signature) > 1 && p[0] == ';') {
4914 return p + 1;
4915 }
4916 }
4917 else {
4918 // Skip leading 'L' and ignore first appearance of ';'
4919 length--;
4920 signature++;
4921 char* c = strchr((char*) signature, ';');
4922 // Format check signature
4923 if (c != NULL) {
4924 ResourceMark rm(THREAD);
4925 int newlen = c - (char*) signature;
4926 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
4927 strncpy(sig, signature, newlen);
4928 sig[newlen] = '\0';
4929
4930 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
4931 if (!legal) {
4932 classfile_parse_error("Class name contains illegal character "
4933 "in descriptor in class file %s",
4934 CHECK_0);
4935 return NULL;
4936 }
4937 return signature + newlen + 1;
4938 }
4939 }
4940 return NULL;
4941 }
4942 case JVM_SIGNATURE_ARRAY:
4943 array_dim++;
4944 if (array_dim > 255) {
4945 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4946 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4947 }
4948 // The rest of what's there better be a legal signature
4949 signature++;
4950 length--;
4951 void_ok = false;
4952 break;
4953 default:
4954 return NULL;
4955 }
4956 }
4957 return NULL;
4958 }
4959
4960 // Checks if name is a legal class name.
4961 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4962 if (!_need_verify || _relax_verify) { return; }
4963
4964 char buf[fixed_buffer_size];
4965 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4966 unsigned int length = name->utf8_length();
4967 bool legal = false;
4968
4969 if (length > 0) {
4970 const char* p;
4971 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4972 p = skip_over_field_signature(bytes, false, length, CHECK);
4973 legal = (p != NULL) && ((p - bytes) == (int)length);
4974 } else if (_major_version < JAVA_1_5_VERSION) {
4975 if (bytes[0] != '<') {
4976 p = skip_over_field_name(bytes, true, length);
4977 legal = (p != NULL) && ((p - bytes) == (int)length);
4978 }
4979 } else {
4980 // 4900761: relax the constraints based on JSR202 spec
4981 // Class names may be drawn from the entire Unicode character set.
4982 // Identifiers between '/' must be unqualified names.
4983 // The utf8 string has been verified when parsing cpool entries.
4984 legal = verify_unqualified_name(bytes, length, LegalClass);
4985 }
4986 }
4987 if (!legal) {
4988 ResourceMark rm(THREAD);
4989 assert(_class_name != NULL, "invariant");
4990 Exceptions::fthrow(
4991 THREAD_AND_LOCATION,
4992 vmSymbols::java_lang_ClassFormatError(),
4993 "Illegal class name \"%s\" in class file %s", bytes,
4994 _class_name->as_C_string()
4995 );
4996 return;
4997 }
4998 }
4999
5000 // Checks if name is a legal field name.
5001 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5002 if (!_need_verify || _relax_verify) { return; }
5003
5004 char buf[fixed_buffer_size];
5005 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5006 unsigned int length = name->utf8_length();
5007 bool legal = false;
5008
5009 if (length > 0) {
5010 if (_major_version < JAVA_1_5_VERSION) {
5011 if (bytes[0] != '<') {
5012 const char* p = skip_over_field_name(bytes, false, length);
5013 legal = (p != NULL) && ((p - bytes) == (int)length);
5014 }
5015 } else {
5016 // 4881221: relax the constraints based on JSR202 spec
5017 legal = verify_unqualified_name(bytes, length, LegalField);
5018 }
5019 }
5020
5021 if (!legal) {
5022 ResourceMark rm(THREAD);
5023 assert(_class_name != NULL, "invariant");
5024 Exceptions::fthrow(
5025 THREAD_AND_LOCATION,
5026 vmSymbols::java_lang_ClassFormatError(),
5027 "Illegal field name \"%s\" in class %s", bytes,
5028 _class_name->as_C_string()
5029 );
5030 return;
5031 }
5032 }
5033
5034 // Checks if name is a legal method name.
5035 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5036 if (!_need_verify || _relax_verify) { return; }
5037
5038 assert(name != NULL, "method name is null");
5039 char buf[fixed_buffer_size];
5040 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5041 unsigned int length = name->utf8_length();
5042 bool legal = false;
5043
5044 if (length > 0) {
5045 if (bytes[0] == '<') {
5046 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5047 legal = true;
5048 }
5049 } else if (_major_version < JAVA_1_5_VERSION) {
5050 const char* p;
5051 p = skip_over_field_name(bytes, false, length);
5052 legal = (p != NULL) && ((p - bytes) == (int)length);
5053 } else {
5054 // 4881221: relax the constraints based on JSR202 spec
5055 legal = verify_unqualified_name(bytes, length, LegalMethod);
5056 }
5057 }
5058
5059 if (!legal) {
5060 ResourceMark rm(THREAD);
5061 assert(_class_name != NULL, "invariant");
5062 Exceptions::fthrow(
5063 THREAD_AND_LOCATION,
5064 vmSymbols::java_lang_ClassFormatError(),
5065 "Illegal method name \"%s\" in class %s", bytes,
5066 _class_name->as_C_string()
5067 );
5068 return;
5069 }
5070 }
5071
5072
5073 // Checks if signature is a legal field signature.
5074 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5075 const Symbol* signature,
5076 TRAPS) const {
5077 if (!_need_verify) { return; }
5078
5079 char buf[fixed_buffer_size];
5080 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5081 const unsigned int length = signature->utf8_length();
5082 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5083
5084 if (p == NULL || (p - bytes) != (int)length) {
5085 throwIllegalSignature("Field", name, signature, CHECK);
5086 }
5087 }
5088
5089 // Checks if signature is a legal method signature.
5090 // Returns number of parameters
5091 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5092 const Symbol* signature,
5093 TRAPS) const {
5094 if (!_need_verify) {
5095 // make sure caller's args_size will be less than 0 even for non-static
5096 // method so it will be recomputed in compute_size_of_parameters().
5097 return -2;
5098 }
5099
5100 // Class initializers cannot have args for class format version >= 51.
5101 if (name == vmSymbols::class_initializer_name() &&
5102 signature != vmSymbols::void_method_signature() &&
5103 _major_version >= JAVA_7_VERSION) {
5104 throwIllegalSignature("Method", name, signature, CHECK_0);
5105 return 0;
5106 }
5107
5108 unsigned int args_size = 0;
5109 char buf[fixed_buffer_size];
5110 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5111 unsigned int length = signature->utf8_length();
5112 const char* nextp;
5113
5114 // The first character must be a '('
5115 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5116 length--;
5117 // Skip over legal field signatures
5118 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5119 while ((length > 0) && (nextp != NULL)) {
5120 args_size++;
5121 if (p[0] == 'J' || p[0] == 'D') {
5122 args_size++;
5123 }
5124 length -= nextp - p;
5125 p = nextp;
5126 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5127 }
5128 // The first non-signature thing better be a ')'
5129 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5130 length--;
5131 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5132 // All internal methods must return void
5133 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5134 return args_size;
5135 }
5136 } else {
5137 // Now we better just have a return value
5138 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5139 if (nextp && ((int)length == (nextp - p))) {
5140 return args_size;
5141 }
5142 }
5143 }
5144 }
5145 // Report error
5146 throwIllegalSignature("Method", name, signature, CHECK_0);
5147 return 0;
5148 }
5149
5150 int ClassFileParser::static_field_size() const {
5151 assert(_field_info != NULL, "invariant");
5152 return _field_info->static_field_size;
5153 }
5154
5155 int ClassFileParser::total_oop_map_count() const {
5156 assert(_field_info != NULL, "invariant");
5157 return _field_info->total_oop_map_count;
5158 }
5159
5160 jint ClassFileParser::layout_size() const {
5161 assert(_field_info != NULL, "invariant");
5162 return _field_info->instance_size;
5163 }
5164
5165 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5166 const Array<Method*>* methods) {
5167 assert(ik != NULL, "invariant");
5168 assert(methods != NULL, "invariant");
5169
5170 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5171 // (We used to do this lazily, but now we query it in Rewriter,
5172 // which is eagerly done for every method, so we might as well do it now,
5173 // when everything is fresh in memory.)
5174 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5175
5176 if (klass_id != vmSymbols::NO_SID) {
5177 for (int j = 0; j < methods->length(); ++j) {
5178 Method* method = methods->at(j);
5179 method->init_intrinsic_id();
5180
5181 if (CheckIntrinsics) {
5182 // Check if an intrinsic is defined for method 'method',
5183 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5184 if (method->intrinsic_id() != vmIntrinsics::_none &&
5185 !method->intrinsic_candidate()) {
5186 tty->print("Compiler intrinsic is defined for method [%s], "
5187 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5188 method->name_and_sig_as_C_string(),
5189 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5190 );
5191 tty->cr();
5192 DEBUG_ONLY(vm_exit(1));
5193 }
5194 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5195 // but there is no intrinsic available for it.
5196 if (method->intrinsic_candidate() &&
5197 method->intrinsic_id() == vmIntrinsics::_none) {
5198 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5199 "but no compiler intrinsic is defined for the method.%s",
5200 method->name_and_sig_as_C_string(),
5201 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5202 );
5203 tty->cr();
5204 DEBUG_ONLY(vm_exit(1));
5205 }
5206 }
5207 } // end for
5208
5209 #ifdef ASSERT
5210 if (CheckIntrinsics) {
5211 // Check for orphan methods in the current class. A method m
5212 // of a class C is orphan if an intrinsic is defined for method m,
5213 // but class C does not declare m.
5214 // The check is potentially expensive, therefore it is available
5215 // only in debug builds.
5216
5217 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5218 if (vmIntrinsics::_compiledLambdaForm == id) {
5219 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5220 // generated for the JVM from a LambdaForm and therefore no method
5221 // is defined for it.
5222 continue;
5223 }
5224
5225 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5226 // Check if the current class contains a method with the same
5227 // name, flags, signature.
5228 bool match = false;
5229 for (int j = 0; j < methods->length(); ++j) {
5230 const Method* method = methods->at(j);
5231 if (method->intrinsic_id() == id) {
5232 match = true;
5233 break;
5234 }
5235 }
5236
5237 if (!match) {
5238 char buf[1000];
5239 tty->print("Compiler intrinsic is defined for method [%s], "
5240 "but the method is not available in class [%s].%s",
5241 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5242 buf, sizeof(buf)),
5243 ik->name()->as_C_string(),
5244 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5245 );
5246 tty->cr();
5247 DEBUG_ONLY(vm_exit(1));
5248 }
5249 }
5250 } // end for
5251 } // CheckIntrinsics
5252 #endif // ASSERT
5253 }
5254 }
5255
5256 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5257 if (_klass != NULL) {
5258 return _klass;
5259 }
5260
5261 InstanceKlass* const ik =
5262 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5263
5264 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5265
5266 assert(_klass == ik, "invariant");
5267
5268 ik->set_has_passed_fingerprint_check(false);
5269 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5270 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5271 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5272 // This class matches with a class saved in an AOT library
5273 ik->set_has_passed_fingerprint_check(true);
5274 } else {
5275 ResourceMark rm;
5276 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5277 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5278 }
5279 }
5280
5281 return ik;
5282 }
5283
5284 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5285 assert(ik != NULL, "invariant");
5286
5287 set_klass_to_deallocate(ik);
5288
5289 assert(_field_info != NULL, "invariant");
5290 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5291 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5292 "sanity");
5293
5294 assert(ik->is_instance_klass(), "sanity");
5295 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5296
5297 // Fill in information already parsed
5298 ik->set_should_verify_class(_need_verify);
5299
5300 // Not yet: supers are done below to support the new subtype-checking fields
5301 ik->set_class_loader_data(_loader_data);
5302 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5303 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5304 assert(_fac != NULL, "invariant");
5305 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5306
5307 // this transfers ownership of a lot of arrays from
5308 // the parser onto the InstanceKlass*
5309 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5310
5311 // note that is not safe to use the fields in the parser from this point on
5312 assert(NULL == _cp, "invariant");
5313 assert(NULL == _fields, "invariant");
5314 assert(NULL == _methods, "invariant");
5315 assert(NULL == _inner_classes, "invariant");
5316 assert(NULL == _local_interfaces, "invariant");
5317 assert(NULL == _transitive_interfaces, "invariant");
5318 assert(NULL == _combined_annotations, "invariant");
5319
5320 if (_has_final_method) {
5321 ik->set_has_final_method();
5322 }
5323
5324 ik->copy_method_ordering(_method_ordering, CHECK);
5325 // The InstanceKlass::_methods_jmethod_ids cache
5326 // is managed on the assumption that the initial cache
5327 // size is equal to the number of methods in the class. If
5328 // that changes, then InstanceKlass::idnum_can_increment()
5329 // has to be changed accordingly.
5330 ik->set_initial_method_idnum(ik->methods()->length());
5331
5332 ik->set_name(_class_name);
5333
5334 if (is_anonymous()) {
5335 // I am well known to myself
5336 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve
5337 }
5338
5339 ik->set_minor_version(_minor_version);
5340 ik->set_major_version(_major_version);
5341 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5342 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5343
5344 if (_host_klass != NULL) {
5345 assert (ik->is_anonymous(), "should be the same");
5346 ik->set_host_klass(_host_klass);
5347 }
5348
5349 // Set PackageEntry for this_klass
5350 oop cl = ik->class_loader();
5351 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5352 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5353 ik->set_package(cld, CHECK);
5354
5355 const Array<Method*>* const methods = ik->methods();
5356 assert(methods != NULL, "invariant");
5357 const int methods_len = methods->length();
5358
5359 check_methods_for_intrinsics(ik, methods);
5360
5361 // Fill in field values obtained by parse_classfile_attributes
5362 if (_parsed_annotations->has_any_annotations()) {
5363 _parsed_annotations->apply_to(ik);
5364 }
5365
5366 apply_parsed_class_attributes(ik);
5367
5368 // Miranda methods
5369 if ((_num_miranda_methods > 0) ||
5370 // if this class introduced new miranda methods or
5371 (_super_klass != NULL && _super_klass->has_miranda_methods())
5372 // super class exists and this class inherited miranda methods
5373 ) {
5374 ik->set_has_miranda_methods(); // then set a flag
5375 }
5376
5377 // Fill in information needed to compute superclasses.
5378 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5379
5380 // Initialize itable offset tables
5381 klassItable::setup_itable_offset_table(ik);
5382
5383 // Compute transitive closure of interfaces this class implements
5384 // Do final class setup
5385 fill_oop_maps(ik,
5386 _field_info->nonstatic_oop_map_count,
5387 _field_info->nonstatic_oop_offsets,
5388 _field_info->nonstatic_oop_counts);
5389
5390 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5391 set_precomputed_flags(ik);
5392
5393 // check if this class can access its super class
5394 check_super_class_access(ik, CHECK);
5395
5396 // check if this class can access its superinterfaces
5397 check_super_interface_access(ik, CHECK);
5398
5399 // check if this class overrides any final method
5400 check_final_method_override(ik, CHECK);
5401
5402 // reject static interface methods prior to Java 8
5403 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5404 check_illegal_static_method(ik, CHECK);
5405 }
5406
5407 // Obtain this_klass' module entry
5408 ModuleEntry* module_entry = ik->module();
5409 assert(module_entry != NULL, "module_entry should always be set");
5410
5411 // Obtain java.lang.reflect.Module
5412 Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module()));
5413
5414 // Allocate mirror and initialize static fields
5415 // The create_mirror() call will also call compute_modifiers()
5416 java_lang_Class::create_mirror(ik,
5417 _loader_data->class_loader(),
5418 module_handle,
5419 _protection_domain,
5420 CHECK);
5421
5422 assert(_all_mirandas != NULL, "invariant");
5423
5424 // Generate any default methods - default methods are public interface methods
5425 // that have a default implementation. This is new with Java 8.
5426 if (_has_nonstatic_concrete_methods) {
5427 DefaultMethods::generate_default_methods(ik,
5428 _all_mirandas,
5429 CHECK);
5430 }
5431
5432 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5433 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5434 !module_entry->has_default_read_edges()) {
5435 if (!module_entry->set_has_default_read_edges()) {
5436 // We won a potential race
5437 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5438 }
5439 }
5440
5441 // Update the loader_data graph.
5442 record_defined_class_dependencies(ik, CHECK);
5443
5444 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5445
5446 if (!is_internal()) {
5447 if (log_is_enabled(Info, class, load)) {
5448 ResourceMark rm;
5449 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5450
5451 if (log_is_enabled(Info, class, load)) {
5452 ik->print_loading_log(LogLevel::Info, _loader_data, module_name, _stream);
5453 }
5454 // No 'else' here as logging levels are not mutually exclusive
5455 if (log_is_enabled(Debug, class, load)) {
5456 ik->print_loading_log(LogLevel::Debug, _loader_data, module_name, _stream);
5457 }
5458 }
5459
5460 if (log_is_enabled(Debug, class, resolve)) {
5461 ResourceMark rm;
5462 // print out the superclass.
5463 const char * from = ik->external_name();
5464 if (ik->java_super() != NULL) {
5465 log_debug(class, resolve)("%s %s (super)",
5466 from,
5467 ik->java_super()->external_name());
5468 }
5469 // print out each of the interface classes referred to by this class.
5470 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5471 if (local_interfaces != NULL) {
5472 const int length = local_interfaces->length();
5473 for (int i = 0; i < length; i++) {
5474 const Klass* const k = local_interfaces->at(i);
5475 const char * to = k->external_name();
5476 log_debug(class, resolve)("%s %s (interface)", from, to);
5477 }
5478 }
5479 }
5480 }
5481
5482 TRACE_INIT_ID(ik);
5483
5484 // If we reach here, all is well.
5485 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5486 // in order for it to not be destroyed in the ClassFileParser destructor.
5487 set_klass_to_deallocate(NULL);
5488
5489 // it's official
5490 set_klass(ik);
5491
5492 debug_only(ik->verify();)
5493 }
5494
5495 // For an anonymous class that is in the unnamed package, move it to its host class's
5496 // package by prepending its host class's package name to its class name and setting
5497 // its _class_name field.
5498 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5499 ResourceMark rm(THREAD);
5500 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5501 "Anonymous class should not be in a package");
5502 const char* host_pkg_name =
5503 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5504
5505 if (host_pkg_name != NULL) {
5506 size_t host_pkg_len = strlen(host_pkg_name);
5507 int class_name_len = _class_name->utf8_length();
5508 char* new_anon_name =
5509 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5510 // Copy host package name and trailing /.
5511 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5512 new_anon_name[host_pkg_len] = '/';
5513 // Append anonymous class name. The anonymous class name can contain odd
5514 // characters. So, do a strncpy instead of using sprintf("%s...").
5515 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5516
5517 // Create a symbol and update the anonymous class name.
5518 _class_name = SymbolTable::new_symbol(new_anon_name,
5519 (int)host_pkg_len + 1 + class_name_len,
5520 CHECK);
5521 }
5522 }
5523
5524 // If the host class and the anonymous class are in the same package then do
5525 // nothing. If the anonymous class is in the unnamed package then move it to its
5526 // host's package. If the classes are in different packages then throw an IAE
5527 // exception.
5528 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5529 assert(_host_klass != NULL, "Expected an anonymous class");
5530
5531 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5532 _class_name->utf8_length(), '/');
5533 if (anon_last_slash == NULL) { // Unnamed package
5534 prepend_host_package_name(_host_klass, CHECK);
5535 } else {
5536 if (!InstanceKlass::is_same_class_package(_host_klass->class_loader(),
5537 _host_klass->name(),
5538 _host_klass->class_loader(),
5539 _class_name)) {
5540 ResourceMark rm(THREAD);
5541 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5542 err_msg("Host class %s and anonymous class %s are in different packages",
5543 _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5544 }
5545 }
5546 }
5547
5548 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5549 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5550 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5551 bool need_verify =
5552 // verifyAll
5553 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5554 // verifyRemote
5555 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5556 return !need_verify;
5557 }
5558
5559 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5560 Symbol* name,
5561 ClassLoaderData* loader_data,
5562 Handle protection_domain,
5563 const InstanceKlass* host_klass,
5564 GrowableArray<Handle>* cp_patches,
5565 Publicity pub_level,
5566 TRAPS) :
5567 _stream(stream),
5568 _requested_name(name),
5569 _loader_data(loader_data),
5570 _host_klass(host_klass),
5571 _cp_patches(cp_patches),
5572 _super_klass(),
5573 _cp(NULL),
5574 _fields(NULL),
5575 _methods(NULL),
5576 _inner_classes(NULL),
5577 _local_interfaces(NULL),
5578 _transitive_interfaces(NULL),
5579 _combined_annotations(NULL),
5580 _annotations(NULL),
5581 _type_annotations(NULL),
5582 _fields_annotations(NULL),
5583 _fields_type_annotations(NULL),
5584 _klass(NULL),
5585 _klass_to_deallocate(NULL),
5586 _parsed_annotations(NULL),
5587 _fac(NULL),
5588 _field_info(NULL),
5589 _method_ordering(NULL),
5590 _all_mirandas(NULL),
5591 _vtable_size(0),
5592 _itable_size(0),
5593 _num_miranda_methods(0),
5594 _rt(REF_NONE),
5595 _protection_domain(protection_domain),
5596 _access_flags(),
5597 _pub_level(pub_level),
5598 _bad_constant_seen(0),
5599 _synthetic_flag(false),
5600 _sde_length(false),
5601 _sde_buffer(NULL),
5602 _sourcefile_index(0),
5603 _generic_signature_index(0),
5604 _major_version(0),
5605 _minor_version(0),
5606 _this_class_index(0),
5607 _super_class_index(0),
5608 _itfs_len(0),
5609 _java_fields_count(0),
5610 _need_verify(false),
5611 _relax_verify(false),
5612 _has_nonstatic_concrete_methods(false),
5613 _declares_nonstatic_concrete_methods(false),
5614 _has_final_method(false),
5615 _has_finalizer(false),
5616 _has_empty_finalizer(false),
5617 _has_vanilla_constructor(false),
5618 _max_bootstrap_specifier_index(-1) {
5619
5620 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5621
5622 assert(THREAD->is_Java_thread(), "invariant");
5623 assert(_loader_data != NULL, "invariant");
5624 assert(stream != NULL, "invariant");
5625 assert(_stream != NULL, "invariant");
5626 assert(_stream->buffer() == _stream->current(), "invariant");
5627 assert(_class_name != NULL, "invariant");
5628 assert(0 == _access_flags.as_int(), "invariant");
5629
5630 // Figure out whether we can skip format checking (matching classic VM behavior)
5631 if (DumpSharedSpaces) {
5632 // verify == true means it's a 'remote' class (i.e., non-boot class)
5633 // Verification decision is based on BytecodeVerificationRemote flag
5634 // for those classes.
5635 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5636 BytecodeVerificationLocal;
5637 }
5638 else {
5639 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5640 stream->need_verify());
5641 }
5642
5643 // synch back verification state to stream
5644 stream->set_verify(_need_verify);
5645
5646 // Check if verification needs to be relaxed for this class file
5647 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5648 _relax_verify = relax_format_check_for(_loader_data);
5649
5650 parse_stream(stream, CHECK);
5651
5652 post_process_parsed_stream(stream, _cp, CHECK);
5653 }
5654
5655 void ClassFileParser::clear_class_metadata() {
5656 // metadata created before the instance klass is created. Must be
5657 // deallocated if classfile parsing returns an error.
5658 _cp = NULL;
5659 _fields = NULL;
5660 _methods = NULL;
5661 _inner_classes = NULL;
5662 _local_interfaces = NULL;
5663 _transitive_interfaces = NULL;
5664 _combined_annotations = NULL;
5665 _annotations = _type_annotations = NULL;
5666 _fields_annotations = _fields_type_annotations = NULL;
5667 }
5668
5669 // Destructor to clean up
5670 ClassFileParser::~ClassFileParser() {
5671 if (_cp != NULL) {
5672 MetadataFactory::free_metadata(_loader_data, _cp);
5673 }
5674 if (_fields != NULL) {
5675 MetadataFactory::free_array<u2>(_loader_data, _fields);
5676 }
5677
5678 if (_methods != NULL) {
5679 // Free methods
5680 InstanceKlass::deallocate_methods(_loader_data, _methods);
5681 }
5682
5683 // beware of the Universe::empty_blah_array!!
5684 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5685 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5686 }
5687
5688 // Free interfaces
5689 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5690 _local_interfaces, _transitive_interfaces);
5691
5692 if (_combined_annotations != NULL) {
5693 // After all annotations arrays have been created, they are installed into the
5694 // Annotations object that will be assigned to the InstanceKlass being created.
5695
5696 // Deallocate the Annotations object and the installed annotations arrays.
5697 _combined_annotations->deallocate_contents(_loader_data);
5698
5699 // If the _combined_annotations pointer is non-NULL,
5700 // then the other annotations fields should have been cleared.
5701 assert(_annotations == NULL, "Should have been cleared");
5702 assert(_type_annotations == NULL, "Should have been cleared");
5703 assert(_fields_annotations == NULL, "Should have been cleared");
5704 assert(_fields_type_annotations == NULL, "Should have been cleared");
5705 } else {
5706 // If the annotations arrays were not installed into the Annotations object,
5707 // then they have to be deallocated explicitly.
5708 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5709 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5710 Annotations::free_contents(_loader_data, _fields_annotations);
5711 Annotations::free_contents(_loader_data, _fields_type_annotations);
5712 }
5713
5714 clear_class_metadata();
5715
5716 // deallocate the klass if already created. Don't directly deallocate, but add
5717 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5718 // at a safepoint.
5719 if (_klass_to_deallocate != NULL) {
5720 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5721 }
5722 }
5723
5724 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5725 TRAPS) {
5726
5727 assert(stream != NULL, "invariant");
5728 assert(_class_name != NULL, "invariant");
5729
5730 // BEGIN STREAM PARSING
5731 stream->guarantee_more(8, CHECK); // magic, major, minor
5732 // Magic value
5733 const u4 magic = stream->get_u4_fast();
5734 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5735 "Incompatible magic value %u in class file %s",
5736 magic, CHECK);
5737
5738 // Version numbers
5739 _minor_version = stream->get_u2_fast();
5740 _major_version = stream->get_u2_fast();
5741
5742 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5743 ResourceMark rm;
5744 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5745 _major_version, _minor_version, _class_name->as_C_string());
5746 Exceptions::fthrow(
5747 THREAD_AND_LOCATION,
5748 vmSymbols::java_lang_UnsupportedClassVersionError(),
5749 "Unsupported major.minor version for dump time %u.%u",
5750 _major_version,
5751 _minor_version);
5752 }
5753
5754 // Check version numbers - we check this even with verifier off
5755 if (!is_supported_version(_major_version, _minor_version)) {
5756 ResourceMark rm(THREAD);
5757 Exceptions::fthrow(
5758 THREAD_AND_LOCATION,
5759 vmSymbols::java_lang_UnsupportedClassVersionError(),
5760 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5761 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
5762 _class_name->as_C_string(),
5763 _major_version,
5764 _minor_version,
5765 JAVA_MAX_SUPPORTED_VERSION,
5766 JAVA_MAX_SUPPORTED_MINOR_VERSION);
5767 return;
5768 }
5769
5770 stream->guarantee_more(3, CHECK); // length, first cp tag
5771 const u2 cp_size = stream->get_u2_fast();
5772
5773 guarantee_property(
5774 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5775 cp_size, CHECK);
5776
5777 _cp = ConstantPool::allocate(_loader_data,
5778 cp_size,
5779 CHECK);
5780
5781 ConstantPool* const cp = _cp;
5782
5783 parse_constant_pool(stream, cp, cp_size, CHECK);
5784
5785 assert(cp_size == (const u2)cp->length(), "invariant");
5786
5787 // ACCESS FLAGS
5788 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5789
5790 // Access flags
5791 jint flags;
5792 // JVM_ACC_MODULE is defined in JDK-9 and later.
5793 if (_major_version >= JAVA_9_VERSION) {
5794 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5795 } else {
5796 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5797 }
5798
5799 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5800 // Set abstract bit for old class files for backward compatibility
5801 flags |= JVM_ACC_ABSTRACT;
5802 }
5803
5804 verify_legal_class_modifiers(flags, CHECK);
5805
5806 short bad_constant = class_bad_constant_seen();
5807 if (bad_constant != 0) {
5808 // Do not throw CFE until after the access_flags are checked because if
5809 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5810 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
5811 }
5812
5813 _access_flags.set_flags(flags);
5814
5815 // This class and superclass
5816 _this_class_index = stream->get_u2_fast();
5817 check_property(
5818 valid_cp_range(_this_class_index, cp_size) &&
5819 cp->tag_at(_this_class_index).is_unresolved_klass(),
5820 "Invalid this class index %u in constant pool in class file %s",
5821 _this_class_index, CHECK);
5822
5823 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5824 assert(class_name_in_cp != NULL, "class_name can't be null");
5825
5826 // Update _class_name which could be null previously
5827 // to reflect the name in the constant pool
5828 _class_name = class_name_in_cp;
5829
5830 // Don't need to check whether this class name is legal or not.
5831 // It has been checked when constant pool is parsed.
5832 // However, make sure it is not an array type.
5833 if (_need_verify) {
5834 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
5835 "Bad class name in class file %s",
5836 CHECK);
5837 }
5838
5839 // Checks if name in class file matches requested name
5840 if (_requested_name != NULL && _requested_name != _class_name) {
5841 ResourceMark rm(THREAD);
5842 Exceptions::fthrow(
5843 THREAD_AND_LOCATION,
5844 vmSymbols::java_lang_NoClassDefFoundError(),
5845 "%s (wrong name: %s)",
5846 _class_name->as_C_string(),
5847 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
5848 );
5849 return;
5850 }
5851
5852 // if this is an anonymous class fix up its name if it's in the unnamed
5853 // package. Otherwise, throw IAE if it is in a different package than
5854 // its host class.
5855 if (_host_klass != NULL) {
5856 fix_anonymous_class_name(CHECK);
5857 }
5858
5859 // Verification prevents us from creating names with dots in them, this
5860 // asserts that that's the case.
5861 assert(is_internal_format(_class_name), "external class name format used internally");
5862
5863 if (!is_internal()) {
5864 if (log_is_enabled(Debug, class, preorder)){
5865 ResourceMark rm(THREAD);
5866 outputStream* log = Log(class, preorder)::debug_stream();
5867 log->print("%s", _class_name->as_klass_external_name());
5868 if (stream->source() != NULL) {
5869 log->print(" source: %s", stream->source());
5870 }
5871 log->cr();
5872 }
5873
5874 #if INCLUDE_CDS
5875 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5876 // Only dump the classes that can be stored into CDS archive.
5877 // Anonymous classes such as generated LambdaForm classes are also not included.
5878 if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
5879 _host_klass == NULL) {
5880 oop class_loader = _loader_data->class_loader();
5881 ResourceMark rm(THREAD);
5882 // For the boot and platform class loaders, check if the class is not found in the
5883 // java runtime image. Additional check for the boot class loader is if the class
5884 // is not found in the boot loader's appended entries. This indicates that the class
5885 // is not useable during run time, such as the ones found in the --patch-module entries,
5886 // so it should not be included in the classlist file.
5887 if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) ||
5888 SystemDictionary::is_platform_class_loader(class_loader)) &&
5889 !ClassLoader::is_jrt(stream->source())) {
5890 tty->print_cr("skip writing class %s from source %s to classlist file",
5891 _class_name->as_C_string(), stream->source());
5892 } else {
5893 classlist_file->print_cr("%s", _class_name->as_C_string());
5894 classlist_file->flush();
5895 }
5896 }
5897 }
5898 #endif
5899 }
5900
5901 // SUPERKLASS
5902 _super_class_index = stream->get_u2_fast();
5903 _super_klass = parse_super_class(cp,
5904 _super_class_index,
5905 _need_verify,
5906 CHECK);
5907
5908 // Interfaces
5909 _itfs_len = stream->get_u2_fast();
5910 parse_interfaces(stream,
5911 _itfs_len,
5912 cp,
5913 &_has_nonstatic_concrete_methods,
5914 CHECK);
5915
5916 assert(_local_interfaces != NULL, "invariant");
5917
5918 // Fields (offsets are filled in later)
5919 _fac = new FieldAllocationCount();
5920 parse_fields(stream,
5921 _access_flags.is_interface(),
5922 _fac,
5923 cp,
5924 cp_size,
5925 &_java_fields_count,
5926 CHECK);
5927
5928 assert(_fields != NULL, "invariant");
5929
5930 // Methods
5931 AccessFlags promoted_flags;
5932 parse_methods(stream,
5933 _access_flags.is_interface(),
5934 &promoted_flags,
5935 &_has_final_method,
5936 &_declares_nonstatic_concrete_methods,
5937 CHECK);
5938
5939 assert(_methods != NULL, "invariant");
5940
5941 // promote flags from parse_methods() to the klass' flags
5942 _access_flags.add_promoted_flags(promoted_flags.as_int());
5943
5944 if (_declares_nonstatic_concrete_methods) {
5945 _has_nonstatic_concrete_methods = true;
5946 }
5947
5948 // Additional attributes/annotations
5949 _parsed_annotations = new ClassAnnotationCollector();
5950 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5951
5952 assert(_inner_classes != NULL, "invariant");
5953
5954 // Finalize the Annotations metadata object,
5955 // now that all annotation arrays have been created.
5956 create_combined_annotations(CHECK);
5957
5958 // Make sure this is the end of class file stream
5959 guarantee_property(stream->at_eos(),
5960 "Extra bytes at the end of class file %s",
5961 CHECK);
5962
5963 // all bytes in stream read and parsed
5964 }
5965
5966 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5967 ConstantPool* cp,
5968 TRAPS) {
5969 assert(stream != NULL, "invariant");
5970 assert(stream->at_eos(), "invariant");
5971 assert(cp != NULL, "invariant");
5972 assert(_loader_data != NULL, "invariant");
5973
5974 if (_class_name == vmSymbols::java_lang_Object()) {
5975 check_property(_local_interfaces == Universe::the_empty_klass_array(),
5976 "java.lang.Object cannot implement an interface in class file %s",
5977 CHECK);
5978 }
5979 // We check super class after class file is parsed and format is checked
5980 if (_super_class_index > 0 && NULL ==_super_klass) {
5981 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5982 if (_access_flags.is_interface()) {
5983 // Before attempting to resolve the superclass, check for class format
5984 // errors not checked yet.
5985 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5986 "Interfaces must have java.lang.Object as superclass in class file %s",
5987 CHECK);
5988 }
5989 _super_klass = (const InstanceKlass*)
5990 SystemDictionary::resolve_super_or_fail(_class_name,
5991 super_class_name,
5992 _loader_data->class_loader(),
5993 _protection_domain,
5994 true,
5995 CHECK);
5996 }
5997
5998 if (_super_klass != NULL) {
5999 if (_super_klass->has_nonstatic_concrete_methods()) {
6000 _has_nonstatic_concrete_methods = true;
6001 }
6002
6003 if (_super_klass->is_interface()) {
6004 ResourceMark rm(THREAD);
6005 Exceptions::fthrow(
6006 THREAD_AND_LOCATION,
6007 vmSymbols::java_lang_IncompatibleClassChangeError(),
6008 "class %s has interface %s as super class",
6009 _class_name->as_klass_external_name(),
6010 _super_klass->external_name()
6011 );
6012 return;
6013 }
6014 // Make sure super class is not final
6015 if (_super_klass->is_final()) {
6016 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6017 }
6018 }
6019
6020 // Compute the transitive list of all unique interfaces implemented by this class
6021 _transitive_interfaces =
6022 compute_transitive_interfaces(_super_klass,
6023 _local_interfaces,
6024 _loader_data,
6025 CHECK);
6026
6027 assert(_transitive_interfaces != NULL, "invariant");
6028
6029 // sort methods
6030 _method_ordering = sort_methods(_methods);
6031
6032 _all_mirandas = new GrowableArray<Method*>(20);
6033
6034 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6035 &_num_miranda_methods,
6036 _all_mirandas,
6037 _super_klass,
6038 _methods,
6039 _access_flags,
6040 _major_version,
6041 _loader_data->class_loader(),
6042 _class_name,
6043 _local_interfaces,
6044 CHECK);
6045
6046 // Size of Java itable (in words)
6047 _itable_size = _access_flags.is_interface() ? 0 :
6048 klassItable::compute_itable_size(_transitive_interfaces);
6049
6050 assert(_fac != NULL, "invariant");
6051 assert(_parsed_annotations != NULL, "invariant");
6052
6053 _field_info = new FieldLayoutInfo();
6054 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6055
6056 // Compute reference typ
6057 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6058
6059 }
6060
6061 void ClassFileParser::set_klass(InstanceKlass* klass) {
6062
6063 #ifdef ASSERT
6064 if (klass != NULL) {
6065 assert(NULL == _klass, "leaking?");
6066 }
6067 #endif
6068
6069 _klass = klass;
6070 }
6071
6072 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6073
6074 #ifdef ASSERT
6075 if (klass != NULL) {
6076 assert(NULL == _klass_to_deallocate, "leaking?");
6077 }
6078 #endif
6079
6080 _klass_to_deallocate = klass;
6081 }
6082
6083 // Caller responsible for ResourceMark
6084 // clone stream with rewound position
6085 const ClassFileStream* ClassFileParser::clone_stream() const {
6086 assert(_stream != NULL, "invariant");
6087
6088 return _stream->clone();
6089 }
6090 // ----------------------------------------------------------------------------
6091 // debugging
6092
6093 #ifdef ASSERT
6094
6095 // return true if class_name contains no '.' (internal format is '/')
6096 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6097 if (class_name != NULL) {
6098 ResourceMark rm;
6099 char* name = class_name->as_C_string();
6100 return strchr(name, '.') == NULL;
6101 } else {
6102 return true;
6103 }
6104 }
6105
6106 #endif