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