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 Klass* 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 = 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 interf = SystemDictionary::resolve_super_or_fail(
857 _class_name,
858 unresolved_klass,
859 Handle(THREAD, _loader_data->class_loader()),
860 _protection_domain,
861 false,
862 CHECK);
863 }
864
865 if (!interf->is_interface()) {
866 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
867 "Implementing class");
868 }
869
870 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
871 *has_nonstatic_concrete_methods = true;
872 }
873 _local_interfaces->at_put(index, interf);
874 }
875
876 if (!_need_verify || itfs_len <= 1) {
877 return;
878 }
879
880 // Check if there's any duplicates in interfaces
881 ResourceMark rm(THREAD);
882 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
883 NameSigHash*,
884 HASH_ROW_SIZE);
885 initialize_hashtable(interface_names);
886 bool dup = false;
887 const Symbol* name = NULL;
888 {
889 debug_only(NoSafepointVerifier nsv;)
890 for (index = 0; index < itfs_len; index++) {
891 const Klass* const k = _local_interfaces->at(index);
892 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 \"%s\" in class file %s",
902 name->as_C_string(), CHECK);
903 }
904 }
905 }
906
907 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
908 int constantvalue_index,
909 int signature_index,
910 TRAPS) const {
911 // Make sure the constant pool entry is of a type appropriate to this field
912 guarantee_property(
913 (constantvalue_index > 0 &&
914 constantvalue_index < cp->length()),
915 "Bad initial value index %u in ConstantValue attribute in class file %s",
916 constantvalue_index, CHECK);
917
918 const constantTag value_type = cp->tag_at(constantvalue_index);
919 switch(cp->basic_type_for_signature_at(signature_index)) {
920 case T_LONG: {
921 guarantee_property(value_type.is_long(),
922 "Inconsistent constant value type in class file %s",
923 CHECK);
924 break;
925 }
926 case T_FLOAT: {
927 guarantee_property(value_type.is_float(),
928 "Inconsistent constant value type in class file %s",
929 CHECK);
930 break;
931 }
932 case T_DOUBLE: {
933 guarantee_property(value_type.is_double(),
934 "Inconsistent constant value type in class file %s",
935 CHECK);
936 break;
937 }
938 case T_BYTE:
939 case T_CHAR:
940 case T_SHORT:
941 case T_BOOLEAN:
942 case T_INT: {
943 guarantee_property(value_type.is_int(),
944 "Inconsistent constant value type in class file %s",
945 CHECK);
946 break;
947 }
948 case T_OBJECT: {
949 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
950 && value_type.is_string()),
951 "Bad string initial value in class file %s",
952 CHECK);
953 break;
954 }
955 default: {
956 classfile_parse_error("Unable to set initial value %u in class file %s",
957 constantvalue_index,
958 CHECK);
959 }
960 }
961 }
962
963 class AnnotationCollector : public ResourceObj{
964 public:
965 enum Location { _in_field, _in_method, _in_class };
966 enum ID {
967 _unknown = 0,
968 _method_CallerSensitive,
969 _method_ForceInline,
970 _method_DontInline,
971 _method_InjectedProfile,
972 _method_LambdaForm_Compiled,
973 _method_LambdaForm_Hidden,
974 _method_HotSpotIntrinsicCandidate,
975 _jdk_internal_vm_annotation_Contended,
976 _field_Stable,
977 _jdk_internal_vm_annotation_ReservedStackAccess,
978 _annotation_LIMIT
979 };
980 const Location _location;
981 int _annotations_present;
982 u2 _contended_group;
983
984 AnnotationCollector(Location location)
985 : _location(location), _annotations_present(0)
986 {
987 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
988 }
989 // If this annotation name has an ID, report it (or _none).
990 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
991 // Set the annotation name:
992 void set_annotation(ID id) {
993 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
994 _annotations_present |= nth_bit((int)id);
995 }
996
997 void remove_annotation(ID id) {
998 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
999 _annotations_present &= ~nth_bit((int)id);
1000 }
1001
1002 // Report if the annotation is present.
1003 bool has_any_annotations() const { return _annotations_present != 0; }
1004 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1005
1006 void set_contended_group(u2 group) { _contended_group = group; }
1007 u2 contended_group() const { return _contended_group; }
1008
1009 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1010
1011 void set_stable(bool stable) { set_annotation(_field_Stable); }
1012 bool is_stable() const { return has_annotation(_field_Stable); }
1013 };
1014
1015 // This class also doubles as a holder for metadata cleanup.
1016 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1017 private:
1018 ClassLoaderData* _loader_data;
1019 AnnotationArray* _field_annotations;
1020 AnnotationArray* _field_type_annotations;
1021 public:
1022 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1023 AnnotationCollector(_in_field),
1024 _loader_data(loader_data),
1025 _field_annotations(NULL),
1026 _field_type_annotations(NULL) {}
1027 ~FieldAnnotationCollector();
1028 void apply_to(FieldInfo* f);
1029 AnnotationArray* field_annotations() { return _field_annotations; }
1030 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1031
1032 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1033 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1034 };
1035
1036 class MethodAnnotationCollector : public AnnotationCollector{
1037 public:
1038 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1039 void apply_to(methodHandle m);
1040 };
1041
1042 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1043 public:
1044 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1045 void apply_to(InstanceKlass* ik);
1046 };
1047
1048
1049 static int skip_annotation_value(const u1*, int, int); // fwd decl
1050
1051 // Safely increment index by val if does not pass limit
1052 #define SAFE_ADD(index, limit, val) \
1053 if (index >= limit - val) return limit; \
1054 index += val;
1055
1056 // Skip an annotation. Return >=limit if there is any problem.
1057 static int skip_annotation(const u1* buffer, int limit, int index) {
1058 assert(buffer != NULL, "invariant");
1059 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1060 // value := switch (tag:u1) { ... }
1061 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1062 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1063 while (--nmem >= 0 && index < limit) {
1064 SAFE_ADD(index, limit, 2); // skip member
1065 index = skip_annotation_value(buffer, limit, index);
1066 }
1067 return index;
1068 }
1069
1070 // Skip an annotation value. Return >=limit if there is any problem.
1071 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1072 assert(buffer != NULL, "invariant");
1073
1074 // value := switch (tag:u1) {
1075 // case B, C, I, S, Z, D, F, J, c: con:u2;
1076 // case e: e_class:u2 e_name:u2;
1077 // case s: s_con:u2;
1078 // case [: do(nval:u2) {value};
1079 // case @: annotation;
1080 // case s: s_con:u2;
1081 // }
1082 SAFE_ADD(index, limit, 1); // read tag
1083 const u1 tag = buffer[index - 1];
1084 switch (tag) {
1085 case 'B':
1086 case 'C':
1087 case 'I':
1088 case 'S':
1089 case 'Z':
1090 case 'D':
1091 case 'F':
1092 case 'J':
1093 case 'c':
1094 case 's':
1095 SAFE_ADD(index, limit, 2); // skip con or s_con
1096 break;
1097 case 'e':
1098 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1099 break;
1100 case '[':
1101 {
1102 SAFE_ADD(index, limit, 2); // read nval
1103 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1104 while (--nval >= 0 && index < limit) {
1105 index = skip_annotation_value(buffer, limit, index);
1106 }
1107 }
1108 break;
1109 case '@':
1110 index = skip_annotation(buffer, limit, index);
1111 break;
1112 default:
1113 return limit; // bad tag byte
1114 }
1115 return index;
1116 }
1117
1118 // Sift through annotations, looking for those significant to the VM:
1119 static void parse_annotations(const ConstantPool* const cp,
1120 const u1* buffer, int limit,
1121 AnnotationCollector* coll,
1122 ClassLoaderData* loader_data,
1123 TRAPS) {
1124
1125 assert(cp != NULL, "invariant");
1126 assert(buffer != NULL, "invariant");
1127 assert(coll != NULL, "invariant");
1128 assert(loader_data != NULL, "invariant");
1129
1130 // annotations := do(nann:u2) {annotation}
1131 int index = 2; // read nann
1132 if (index >= limit) return;
1133 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1134 enum { // initial annotation layout
1135 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1136 count_off = 2, // u2 such as 1 (one value)
1137 member_off = 4, // utf8 such as 'value'
1138 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1139 e_tag_val = 'e',
1140 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1141 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1142 e_size = 11, // end of 'e' annotation
1143 c_tag_val = 'c', // payload is type
1144 c_con_off = 7, // utf8 payload, such as 'I'
1145 c_size = 9, // end of 'c' annotation
1146 s_tag_val = 's', // payload is String
1147 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1148 s_size = 9,
1149 min_size = 6 // smallest possible size (zero members)
1150 };
1151 // Cannot add min_size to index in case of overflow MAX_INT
1152 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1153 int index0 = index;
1154 index = skip_annotation(buffer, limit, index);
1155 const u1* const abase = buffer + index0;
1156 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1157 const int count = Bytes::get_Java_u2((address)abase + count_off);
1158 const Symbol* const aname = check_symbol_at(cp, atype);
1159 if (aname == NULL) break; // invalid annotation name
1160 const Symbol* member = NULL;
1161 if (count >= 1) {
1162 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1163 member = check_symbol_at(cp, member_index);
1164 if (member == NULL) break; // invalid member name
1165 }
1166
1167 // Here is where parsing particular annotations will take place.
1168 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1169 if (AnnotationCollector::_unknown == id) continue;
1170 coll->set_annotation(id);
1171
1172 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1173 // @Contended can optionally specify the contention group.
1174 //
1175 // Contended group defines the equivalence class over the fields:
1176 // the fields within the same contended group are not treated distinct.
1177 // The only exception is default group, which does not incur the
1178 // equivalence. Naturally, contention group for classes is meaningless.
1179 //
1180 // While the contention group is specified as String, annotation
1181 // values are already interned, and we might as well use the constant
1182 // pool index as the group tag.
1183 //
1184 u2 group_index = 0; // default contended group
1185 if (count == 1
1186 && s_size == (index - index0) // match size
1187 && s_tag_val == *(abase + tag_off)
1188 && member == vmSymbols::value_name()) {
1189 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1190 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1191 group_index = 0; // default contended group
1192 }
1193 }
1194 coll->set_contended_group(group_index);
1195 }
1196 }
1197 }
1198
1199
1200 // Parse attributes for a field.
1201 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1202 u2 attributes_count,
1203 bool is_static, u2 signature_index,
1204 u2* const constantvalue_index_addr,
1205 bool* const is_synthetic_addr,
1206 u2* const generic_signature_index_addr,
1207 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1208 TRAPS) {
1209 assert(cfs != NULL, "invariant");
1210 assert(constantvalue_index_addr != NULL, "invariant");
1211 assert(is_synthetic_addr != NULL, "invariant");
1212 assert(generic_signature_index_addr != NULL, "invariant");
1213 assert(parsed_annotations != NULL, "invariant");
1214 assert(attributes_count > 0, "attributes_count should be greater than 0");
1215
1216 u2 constantvalue_index = 0;
1217 u2 generic_signature_index = 0;
1218 bool is_synthetic = false;
1219 const u1* runtime_visible_annotations = NULL;
1220 int runtime_visible_annotations_length = 0;
1221 const u1* runtime_invisible_annotations = NULL;
1222 int runtime_invisible_annotations_length = 0;
1223 const u1* runtime_visible_type_annotations = NULL;
1224 int runtime_visible_type_annotations_length = 0;
1225 const u1* runtime_invisible_type_annotations = NULL;
1226 int runtime_invisible_type_annotations_length = 0;
1227 bool runtime_invisible_annotations_exists = false;
1228 bool runtime_invisible_type_annotations_exists = false;
1229 const ConstantPool* const cp = _cp;
1230
1231 while (attributes_count--) {
1232 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1233 const u2 attribute_name_index = cfs->get_u2_fast();
1234 const u4 attribute_length = cfs->get_u4_fast();
1235 check_property(valid_symbol_at(attribute_name_index),
1236 "Invalid field attribute index %u in class file %s",
1237 attribute_name_index,
1238 CHECK);
1239
1240 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1241 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1242 // ignore if non-static
1243 if (constantvalue_index != 0) {
1244 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1245 }
1246 check_property(
1247 attribute_length == 2,
1248 "Invalid ConstantValue field attribute length %u in class file %s",
1249 attribute_length, CHECK);
1250
1251 constantvalue_index = cfs->get_u2(CHECK);
1252 if (_need_verify) {
1253 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1254 }
1255 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1256 if (attribute_length != 0) {
1257 classfile_parse_error(
1258 "Invalid Synthetic field attribute length %u in class file %s",
1259 attribute_length, CHECK);
1260 }
1261 is_synthetic = true;
1262 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1263 if (attribute_length != 0) {
1264 classfile_parse_error(
1265 "Invalid Deprecated field attribute length %u in class file %s",
1266 attribute_length, CHECK);
1267 }
1268 } else if (_major_version >= JAVA_1_5_VERSION) {
1269 if (attribute_name == vmSymbols::tag_signature()) {
1270 if (generic_signature_index != 0) {
1271 classfile_parse_error(
1272 "Multiple Signature attributes for field in class file %s", CHECK);
1273 }
1274 if (attribute_length != 2) {
1275 classfile_parse_error(
1276 "Wrong size %u for field's Signature attribute in class file %s",
1277 attribute_length, CHECK);
1278 }
1279 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1280 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1281 if (runtime_visible_annotations != NULL) {
1282 classfile_parse_error(
1283 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1284 }
1285 runtime_visible_annotations_length = attribute_length;
1286 runtime_visible_annotations = cfs->get_u1_buffer();
1287 assert(runtime_visible_annotations != NULL, "null visible annotations");
1288 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1289 parse_annotations(cp,
1290 runtime_visible_annotations,
1291 runtime_visible_annotations_length,
1292 parsed_annotations,
1293 _loader_data,
1294 CHECK);
1295 cfs->skip_u1_fast(runtime_visible_annotations_length);
1296 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1297 if (runtime_invisible_annotations_exists) {
1298 classfile_parse_error(
1299 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1300 }
1301 runtime_invisible_annotations_exists = true;
1302 if (PreserveAllAnnotations) {
1303 runtime_invisible_annotations_length = attribute_length;
1304 runtime_invisible_annotations = cfs->get_u1_buffer();
1305 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1306 }
1307 cfs->skip_u1(attribute_length, CHECK);
1308 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1309 if (runtime_visible_type_annotations != NULL) {
1310 classfile_parse_error(
1311 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1312 }
1313 runtime_visible_type_annotations_length = attribute_length;
1314 runtime_visible_type_annotations = cfs->get_u1_buffer();
1315 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1316 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1317 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1318 if (runtime_invisible_type_annotations_exists) {
1319 classfile_parse_error(
1320 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1321 } else {
1322 runtime_invisible_type_annotations_exists = true;
1323 }
1324 if (PreserveAllAnnotations) {
1325 runtime_invisible_type_annotations_length = attribute_length;
1326 runtime_invisible_type_annotations = cfs->get_u1_buffer();
1327 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1328 }
1329 cfs->skip_u1(attribute_length, CHECK);
1330 } else {
1331 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1332 }
1333 } else {
1334 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1335 }
1336 }
1337
1338 *constantvalue_index_addr = constantvalue_index;
1339 *is_synthetic_addr = is_synthetic;
1340 *generic_signature_index_addr = generic_signature_index;
1341 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1342 runtime_visible_annotations_length,
1343 runtime_invisible_annotations,
1344 runtime_invisible_annotations_length,
1345 CHECK);
1346 parsed_annotations->set_field_annotations(a);
1347 a = assemble_annotations(runtime_visible_type_annotations,
1348 runtime_visible_type_annotations_length,
1349 runtime_invisible_type_annotations,
1350 runtime_invisible_type_annotations_length,
1351 CHECK);
1352 parsed_annotations->set_field_type_annotations(a);
1353 return;
1354 }
1355
1356
1357 // Field allocation types. Used for computing field offsets.
1358
1359 enum FieldAllocationType {
1360 STATIC_OOP, // Oops
1361 STATIC_BYTE, // Boolean, Byte, char
1362 STATIC_SHORT, // shorts
1363 STATIC_WORD, // ints
1364 STATIC_DOUBLE, // aligned long or double
1365 NONSTATIC_OOP,
1366 NONSTATIC_BYTE,
1367 NONSTATIC_SHORT,
1368 NONSTATIC_WORD,
1369 NONSTATIC_DOUBLE,
1370 MAX_FIELD_ALLOCATION_TYPE,
1371 BAD_ALLOCATION_TYPE = -1
1372 };
1373
1374 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1375 BAD_ALLOCATION_TYPE, // 0
1376 BAD_ALLOCATION_TYPE, // 1
1377 BAD_ALLOCATION_TYPE, // 2
1378 BAD_ALLOCATION_TYPE, // 3
1379 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1380 NONSTATIC_SHORT, // T_CHAR = 5,
1381 NONSTATIC_WORD, // T_FLOAT = 6,
1382 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1383 NONSTATIC_BYTE, // T_BYTE = 8,
1384 NONSTATIC_SHORT, // T_SHORT = 9,
1385 NONSTATIC_WORD, // T_INT = 10,
1386 NONSTATIC_DOUBLE, // T_LONG = 11,
1387 NONSTATIC_OOP, // T_OBJECT = 12,
1388 NONSTATIC_OOP, // T_ARRAY = 13,
1389 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1390 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1391 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1392 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1393 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1394 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1395 BAD_ALLOCATION_TYPE, // 0
1396 BAD_ALLOCATION_TYPE, // 1
1397 BAD_ALLOCATION_TYPE, // 2
1398 BAD_ALLOCATION_TYPE, // 3
1399 STATIC_BYTE , // T_BOOLEAN = 4,
1400 STATIC_SHORT, // T_CHAR = 5,
1401 STATIC_WORD, // T_FLOAT = 6,
1402 STATIC_DOUBLE, // T_DOUBLE = 7,
1403 STATIC_BYTE, // T_BYTE = 8,
1404 STATIC_SHORT, // T_SHORT = 9,
1405 STATIC_WORD, // T_INT = 10,
1406 STATIC_DOUBLE, // T_LONG = 11,
1407 STATIC_OOP, // T_OBJECT = 12,
1408 STATIC_OOP, // T_ARRAY = 13,
1409 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1410 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1411 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1412 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1413 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1414 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1415 };
1416
1417 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1418 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1419 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1420 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1421 return result;
1422 }
1423
1424 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1425 public:
1426 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1427
1428 FieldAllocationCount() {
1429 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1430 count[i] = 0;
1431 }
1432 }
1433
1434 FieldAllocationType update(bool is_static, BasicType type) {
1435 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1436 if (atype != BAD_ALLOCATION_TYPE) {
1437 // Make sure there is no overflow with injected fields.
1438 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1439 count[atype]++;
1440 }
1441 return atype;
1442 }
1443 };
1444
1445 // Side-effects: populates the _fields, _fields_annotations,
1446 // _fields_type_annotations fields
1447 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1448 bool is_interface,
1449 FieldAllocationCount* const fac,
1450 ConstantPool* cp,
1451 const int cp_size,
1452 u2* const java_fields_count_ptr,
1453 TRAPS) {
1454
1455 assert(cfs != NULL, "invariant");
1456 assert(fac != NULL, "invariant");
1457 assert(cp != NULL, "invariant");
1458 assert(java_fields_count_ptr != NULL, "invariant");
1459
1460 assert(NULL == _fields, "invariant");
1461 assert(NULL == _fields_annotations, "invariant");
1462 assert(NULL == _fields_type_annotations, "invariant");
1463
1464 cfs->guarantee_more(2, CHECK); // length
1465 const u2 length = cfs->get_u2_fast();
1466 *java_fields_count_ptr = length;
1467
1468 int num_injected = 0;
1469 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1470 &num_injected);
1471 const int total_fields = length + num_injected;
1472
1473 // The field array starts with tuples of shorts
1474 // [access, name index, sig index, initial value index, byte offset].
1475 // A generic signature slot only exists for field with generic
1476 // signature attribute. And the access flag is set with
1477 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1478 // signature slots are at the end of the field array and after all
1479 // other fields data.
1480 //
1481 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1482 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1483 // ...
1484 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1485 // [generic signature index]
1486 // [generic signature index]
1487 // ...
1488 //
1489 // Allocate a temporary resource array for field data. For each field,
1490 // a slot is reserved in the temporary array for the generic signature
1491 // index. After parsing all fields, the data are copied to a permanent
1492 // array and any unused slots will be discarded.
1493 ResourceMark rm(THREAD);
1494 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1495 u2,
1496 total_fields * (FieldInfo::field_slots + 1));
1497
1498 // The generic signature slots start after all other fields' data.
1499 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1500 int num_generic_signature = 0;
1501 for (int n = 0; n < length; n++) {
1502 // access_flags, name_index, descriptor_index, attributes_count
1503 cfs->guarantee_more(8, CHECK);
1504
1505 AccessFlags access_flags;
1506 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1507 verify_legal_field_modifiers(flags, is_interface, CHECK);
1508 access_flags.set_flags(flags);
1509
1510 const u2 name_index = cfs->get_u2_fast();
1511 check_property(valid_symbol_at(name_index),
1512 "Invalid constant pool index %u for field name in class file %s",
1513 name_index, CHECK);
1514 const Symbol* const name = cp->symbol_at(name_index);
1515 verify_legal_field_name(name, CHECK);
1516
1517 const u2 signature_index = cfs->get_u2_fast();
1518 check_property(valid_symbol_at(signature_index),
1519 "Invalid constant pool index %u for field signature in class file %s",
1520 signature_index, CHECK);
1521 const Symbol* const sig = cp->symbol_at(signature_index);
1522 verify_legal_field_signature(name, sig, CHECK);
1523
1524 u2 constantvalue_index = 0;
1525 bool is_synthetic = false;
1526 u2 generic_signature_index = 0;
1527 const bool is_static = access_flags.is_static();
1528 FieldAnnotationCollector parsed_annotations(_loader_data);
1529
1530 const u2 attributes_count = cfs->get_u2_fast();
1531 if (attributes_count > 0) {
1532 parse_field_attributes(cfs,
1533 attributes_count,
1534 is_static,
1535 signature_index,
1536 &constantvalue_index,
1537 &is_synthetic,
1538 &generic_signature_index,
1539 &parsed_annotations,
1540 CHECK);
1541
1542 if (parsed_annotations.field_annotations() != NULL) {
1543 if (_fields_annotations == NULL) {
1544 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1545 _loader_data, length, NULL,
1546 CHECK);
1547 }
1548 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1549 parsed_annotations.set_field_annotations(NULL);
1550 }
1551 if (parsed_annotations.field_type_annotations() != NULL) {
1552 if (_fields_type_annotations == NULL) {
1553 _fields_type_annotations =
1554 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1555 length,
1556 NULL,
1557 CHECK);
1558 }
1559 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1560 parsed_annotations.set_field_type_annotations(NULL);
1561 }
1562
1563 if (is_synthetic) {
1564 access_flags.set_is_synthetic();
1565 }
1566 if (generic_signature_index != 0) {
1567 access_flags.set_field_has_generic_signature();
1568 fa[generic_signature_slot] = generic_signature_index;
1569 generic_signature_slot ++;
1570 num_generic_signature ++;
1571 }
1572 }
1573
1574 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1575 field->initialize(access_flags.as_short(),
1576 name_index,
1577 signature_index,
1578 constantvalue_index);
1579 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1580
1581 // Remember how many oops we encountered and compute allocation type
1582 const FieldAllocationType atype = fac->update(is_static, type);
1583 field->set_allocation_type(atype);
1584
1585 // After field is initialized with type, we can augment it with aux info
1586 if (parsed_annotations.has_any_annotations())
1587 parsed_annotations.apply_to(field);
1588 }
1589
1590 int index = length;
1591 if (num_injected != 0) {
1592 for (int n = 0; n < num_injected; n++) {
1593 // Check for duplicates
1594 if (injected[n].may_be_java) {
1595 const Symbol* const name = injected[n].name();
1596 const Symbol* const signature = injected[n].signature();
1597 bool duplicate = false;
1598 for (int i = 0; i < length; i++) {
1599 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1600 if (name == cp->symbol_at(f->name_index()) &&
1601 signature == cp->symbol_at(f->signature_index())) {
1602 // Symbol is desclared in Java so skip this one
1603 duplicate = true;
1604 break;
1605 }
1606 }
1607 if (duplicate) {
1608 // These will be removed from the field array at the end
1609 continue;
1610 }
1611 }
1612
1613 // Injected field
1614 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1615 field->initialize(JVM_ACC_FIELD_INTERNAL,
1616 injected[n].name_index,
1617 injected[n].signature_index,
1618 0);
1619
1620 const BasicType type = FieldType::basic_type(injected[n].signature());
1621
1622 // Remember how many oops we encountered and compute allocation type
1623 const FieldAllocationType atype = fac->update(false, type);
1624 field->set_allocation_type(atype);
1625 index++;
1626 }
1627 }
1628
1629 assert(NULL == _fields, "invariant");
1630
1631 _fields =
1632 MetadataFactory::new_array<u2>(_loader_data,
1633 index * FieldInfo::field_slots + num_generic_signature,
1634 CHECK);
1635 // Sometimes injected fields already exist in the Java source so
1636 // the fields array could be too long. In that case the
1637 // fields array is trimed. Also unused slots that were reserved
1638 // for generic signature indexes are discarded.
1639 {
1640 int i = 0;
1641 for (; i < index * FieldInfo::field_slots; i++) {
1642 _fields->at_put(i, fa[i]);
1643 }
1644 for (int j = total_fields * FieldInfo::field_slots;
1645 j < generic_signature_slot; j++) {
1646 _fields->at_put(i++, fa[j]);
1647 }
1648 assert(_fields->length() == i, "");
1649 }
1650
1651 if (_need_verify && length > 1) {
1652 // Check duplicated fields
1653 ResourceMark rm(THREAD);
1654 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1655 THREAD, NameSigHash*, HASH_ROW_SIZE);
1656 initialize_hashtable(names_and_sigs);
1657 bool dup = false;
1658 const Symbol* name = NULL;
1659 const Symbol* sig = NULL;
1660 {
1661 debug_only(NoSafepointVerifier nsv;)
1662 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1663 name = fs.name();
1664 sig = fs.signature();
1665 // If no duplicates, add name/signature in hashtable names_and_sigs.
1666 if (!put_after_lookup(name, sig, names_and_sigs)) {
1667 dup = true;
1668 break;
1669 }
1670 }
1671 }
1672 if (dup) {
1673 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1674 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1675 }
1676 }
1677 }
1678
1679
1680 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) {
1681 while (length-- > 0) {
1682 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1683 }
1684 }
1685
1686 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1687 u4 code_length,
1688 u4 exception_table_length,
1689 TRAPS) {
1690 assert(cfs != NULL, "invariant");
1691
1692 const u2* const exception_table_start = cfs->get_u2_buffer();
1693 assert(exception_table_start != NULL, "null exception table");
1694
1695 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1696 // end_pc,
1697 // handler_pc,
1698 // catch_type_index
1699
1700 // Will check legal target after parsing code array in verifier.
1701 if (_need_verify) {
1702 for (unsigned int i = 0; i < exception_table_length; i++) {
1703 const u2 start_pc = cfs->get_u2_fast();
1704 const u2 end_pc = cfs->get_u2_fast();
1705 const u2 handler_pc = cfs->get_u2_fast();
1706 const u2 catch_type_index = cfs->get_u2_fast();
1707 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1708 "Illegal exception table range in class file %s",
1709 CHECK_NULL);
1710 guarantee_property(handler_pc < code_length,
1711 "Illegal exception table handler in class file %s",
1712 CHECK_NULL);
1713 if (catch_type_index != 0) {
1714 guarantee_property(valid_klass_reference_at(catch_type_index),
1715 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1716 }
1717 }
1718 } else {
1719 cfs->skip_u2_fast(exception_table_length * 4);
1720 }
1721 return exception_table_start;
1722 }
1723
1724 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1725 u4 code_length,
1726 CompressedLineNumberWriteStream**const write_stream,
1727 TRAPS) {
1728
1729 const ClassFileStream* const cfs = _stream;
1730 unsigned int num_entries = cfs->get_u2(CHECK);
1731
1732 // Each entry is a u2 start_pc, and a u2 line_number
1733 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1734
1735 // Verify line number attribute and table length
1736 check_property(
1737 code_attribute_length == sizeof(u2) + length_in_bytes,
1738 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1739
1740 cfs->guarantee_more(length_in_bytes, CHECK);
1741
1742 if ((*write_stream) == NULL) {
1743 if (length_in_bytes > fixed_buffer_size) {
1744 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1745 } else {
1746 (*write_stream) = new CompressedLineNumberWriteStream(
1747 _linenumbertable_buffer, fixed_buffer_size);
1748 }
1749 }
1750
1751 while (num_entries-- > 0) {
1752 const u2 bci = cfs->get_u2_fast(); // start_pc
1753 const u2 line = cfs->get_u2_fast(); // line_number
1754 guarantee_property(bci < code_length,
1755 "Invalid pc in LineNumberTable in class file %s", CHECK);
1756 (*write_stream)->write_pair(bci, line);
1757 }
1758 }
1759
1760
1761 class LVT_Hash : public AllStatic {
1762 public:
1763
1764 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1765 /*
1766 * 3-tuple start_bci/length/slot has to be unique key,
1767 * so the following comparison seems to be redundant:
1768 * && elem->name_cp_index == entry->_elem->name_cp_index
1769 */
1770 return (e0.start_bci == e1.start_bci &&
1771 e0.length == e1.length &&
1772 e0.name_cp_index == e1.name_cp_index &&
1773 e0.slot == e1.slot);
1774 }
1775
1776 static unsigned int hash(LocalVariableTableElement const& e0) {
1777 unsigned int raw_hash = e0.start_bci;
1778
1779 raw_hash = e0.length + raw_hash * 37;
1780 raw_hash = e0.name_cp_index + raw_hash * 37;
1781 raw_hash = e0.slot + raw_hash * 37;
1782
1783 return raw_hash;
1784 }
1785 };
1786
1787
1788 // Class file LocalVariableTable elements.
1789 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1790 public:
1791 u2 start_bci;
1792 u2 length;
1793 u2 name_cp_index;
1794 u2 descriptor_cp_index;
1795 u2 slot;
1796 };
1797
1798 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1799 LocalVariableTableElement* const lvt) {
1800 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1801 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1802 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1803 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1804 lvt->signature_cp_index = 0;
1805 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1806 }
1807
1808 // Function is used to parse both attributes:
1809 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1810 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1811 u4 code_length,
1812 u2 max_locals,
1813 u4 code_attribute_length,
1814 u2* const localvariable_table_length,
1815 bool isLVTT,
1816 TRAPS) {
1817 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1818 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1819 const unsigned int size =
1820 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1821
1822 const ConstantPool* const cp = _cp;
1823
1824 // Verify local variable table attribute has right length
1825 if (_need_verify) {
1826 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1827 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1828 }
1829
1830 const u2* const localvariable_table_start = cfs->get_u2_buffer();
1831 assert(localvariable_table_start != NULL, "null local variable table");
1832 if (!_need_verify) {
1833 cfs->skip_u2_fast(size);
1834 } else {
1835 cfs->guarantee_more(size * 2, CHECK_NULL);
1836 for(int i = 0; i < (*localvariable_table_length); i++) {
1837 const u2 start_pc = cfs->get_u2_fast();
1838 const u2 length = cfs->get_u2_fast();
1839 const u2 name_index = cfs->get_u2_fast();
1840 const u2 descriptor_index = cfs->get_u2_fast();
1841 const u2 index = cfs->get_u2_fast();
1842 // Assign to a u4 to avoid overflow
1843 const u4 end_pc = (u4)start_pc + (u4)length;
1844
1845 if (start_pc >= code_length) {
1846 classfile_parse_error(
1847 "Invalid start_pc %u in %s in class file %s",
1848 start_pc, tbl_name, CHECK_NULL);
1849 }
1850 if (end_pc > code_length) {
1851 classfile_parse_error(
1852 "Invalid length %u in %s in class file %s",
1853 length, tbl_name, CHECK_NULL);
1854 }
1855 const int cp_size = cp->length();
1856 guarantee_property(valid_symbol_at(name_index),
1857 "Name index %u in %s has bad constant type in class file %s",
1858 name_index, tbl_name, CHECK_NULL);
1859 guarantee_property(valid_symbol_at(descriptor_index),
1860 "Signature index %u in %s has bad constant type in class file %s",
1861 descriptor_index, tbl_name, CHECK_NULL);
1862
1863 const Symbol* const name = cp->symbol_at(name_index);
1864 const Symbol* const sig = cp->symbol_at(descriptor_index);
1865 verify_legal_field_name(name, CHECK_NULL);
1866 u2 extra_slot = 0;
1867 if (!isLVTT) {
1868 verify_legal_field_signature(name, sig, CHECK_NULL);
1869
1870 // 4894874: check special cases for double and long local variables
1871 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1872 sig == vmSymbols::type_signature(T_LONG)) {
1873 extra_slot = 1;
1874 }
1875 }
1876 guarantee_property((index + extra_slot) < max_locals,
1877 "Invalid index %u in %s in class file %s",
1878 index, tbl_name, CHECK_NULL);
1879 }
1880 }
1881 return localvariable_table_start;
1882 }
1883
1884
1885 void ClassFileParser::parse_type_array(u2 array_length,
1886 u4 code_length,
1887 u4* const u1_index,
1888 u4* const u2_index,
1889 u1* const u1_array,
1890 u2* const u2_array,
1891 TRAPS) {
1892 const ClassFileStream* const cfs = _stream;
1893 u2 index = 0; // index in the array with long/double occupying two slots
1894 u4 i1 = *u1_index;
1895 u4 i2 = *u2_index + 1;
1896 for(int i = 0; i < array_length; i++) {
1897 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1898 index++;
1899 if (tag == ITEM_Long || tag == ITEM_Double) {
1900 index++;
1901 } else if (tag == ITEM_Object) {
1902 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1903 guarantee_property(valid_klass_reference_at(class_index),
1904 "Bad class index %u in StackMap in class file %s",
1905 class_index, CHECK);
1906 } else if (tag == ITEM_Uninitialized) {
1907 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1908 guarantee_property(
1909 offset < code_length,
1910 "Bad uninitialized type offset %u in StackMap in class file %s",
1911 offset, CHECK);
1912 } else {
1913 guarantee_property(
1914 tag <= (u1)ITEM_Uninitialized,
1915 "Unknown variable type %u in StackMap in class file %s",
1916 tag, CHECK);
1917 }
1918 }
1919 u2_array[*u2_index] = index;
1920 *u1_index = i1;
1921 *u2_index = i2;
1922 }
1923
1924 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1925 u4 code_attribute_length,
1926 bool need_verify,
1927 TRAPS) {
1928 assert(cfs != NULL, "invariant");
1929
1930 if (0 == code_attribute_length) {
1931 return NULL;
1932 }
1933
1934 const u1* const stackmap_table_start = cfs->get_u1_buffer();
1935 assert(stackmap_table_start != NULL, "null stackmap table");
1936
1937 // check code_attribute_length first
1938 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1939
1940 if (!need_verify && !DumpSharedSpaces) {
1941 return NULL;
1942 }
1943 return stackmap_table_start;
1944 }
1945
1946 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1947 u2* const checked_exceptions_length,
1948 u4 method_attribute_length,
1949 TRAPS) {
1950 assert(cfs != NULL, "invariant");
1951 assert(checked_exceptions_length != NULL, "invariant");
1952
1953 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1954 *checked_exceptions_length = cfs->get_u2_fast();
1955 const unsigned int size =
1956 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1957 const u2* const checked_exceptions_start = cfs->get_u2_buffer();
1958 assert(checked_exceptions_start != NULL, "null checked exceptions");
1959 if (!_need_verify) {
1960 cfs->skip_u2_fast(size);
1961 } else {
1962 // Verify each value in the checked exception table
1963 u2 checked_exception;
1964 const u2 len = *checked_exceptions_length;
1965 cfs->guarantee_more(2 * len, CHECK_NULL);
1966 for (int i = 0; i < len; i++) {
1967 checked_exception = cfs->get_u2_fast();
1968 check_property(
1969 valid_klass_reference_at(checked_exception),
1970 "Exception name has bad type at constant pool %u in class file %s",
1971 checked_exception, CHECK_NULL);
1972 }
1973 }
1974 // check exceptions attribute length
1975 if (_need_verify) {
1976 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1977 sizeof(u2) * size),
1978 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1979 }
1980 return checked_exceptions_start;
1981 }
1982
1983 void ClassFileParser::throwIllegalSignature(const char* type,
1984 const Symbol* name,
1985 const Symbol* sig,
1986 TRAPS) const {
1987 assert(name != NULL, "invariant");
1988 assert(sig != NULL, "invariant");
1989
1990 ResourceMark rm(THREAD);
1991 Exceptions::fthrow(THREAD_AND_LOCATION,
1992 vmSymbols::java_lang_ClassFormatError(),
1993 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1994 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1995 }
1996
1997 AnnotationCollector::ID
1998 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1999 const Symbol* name) {
2000 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2001 // Privileged code can use all annotations. Other code silently drops some.
2002 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2003 loader_data->is_platform_class_loader_data() ||
2004 loader_data->is_anonymous();
2005 switch (sid) {
2006 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2007 if (_location != _in_method) break; // only allow for methods
2008 if (!privileged) break; // only allow in privileged code
2009 return _method_CallerSensitive;
2010 }
2011 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2012 if (_location != _in_method) break; // only allow for methods
2013 if (!privileged) break; // only allow in privileged code
2014 return _method_ForceInline;
2015 }
2016 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2017 if (_location != _in_method) break; // only allow for methods
2018 if (!privileged) break; // only allow in privileged code
2019 return _method_DontInline;
2020 }
2021 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2022 if (_location != _in_method) break; // only allow for methods
2023 if (!privileged) break; // only allow in privileged code
2024 return _method_InjectedProfile;
2025 }
2026 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2027 if (_location != _in_method) break; // only allow for methods
2028 if (!privileged) break; // only allow in privileged code
2029 return _method_LambdaForm_Compiled;
2030 }
2031 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
2032 if (_location != _in_method) break; // only allow for methods
2033 if (!privileged) break; // only allow in privileged code
2034 return _method_LambdaForm_Hidden;
2035 }
2036 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2037 if (_location != _in_method) break; // only allow for methods
2038 if (!privileged) break; // only allow in privileged code
2039 return _method_HotSpotIntrinsicCandidate;
2040 }
2041 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2042 if (_location != _in_field) break; // only allow for fields
2043 if (!privileged) break; // only allow in privileged code
2044 return _field_Stable;
2045 }
2046 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2047 if (_location != _in_field && _location != _in_class) {
2048 break; // only allow for fields and classes
2049 }
2050 if (!EnableContended || (RestrictContended && !privileged)) {
2051 break; // honor privileges
2052 }
2053 return _jdk_internal_vm_annotation_Contended;
2054 }
2055 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2056 if (_location != _in_method) break; // only allow for methods
2057 if (RestrictReservedStack && !privileged) break; // honor privileges
2058 return _jdk_internal_vm_annotation_ReservedStackAccess;
2059 }
2060 default: {
2061 break;
2062 }
2063 }
2064 return AnnotationCollector::_unknown;
2065 }
2066
2067 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2068 if (is_contended())
2069 f->set_contended_group(contended_group());
2070 if (is_stable())
2071 f->set_stable(true);
2072 }
2073
2074 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2075 // If there's an error deallocate metadata for field annotations
2076 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2077 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2078 }
2079
2080 void MethodAnnotationCollector::apply_to(methodHandle m) {
2081 if (has_annotation(_method_CallerSensitive))
2082 m->set_caller_sensitive(true);
2083 if (has_annotation(_method_ForceInline))
2084 m->set_force_inline(true);
2085 if (has_annotation(_method_DontInline))
2086 m->set_dont_inline(true);
2087 if (has_annotation(_method_InjectedProfile))
2088 m->set_has_injected_profile(true);
2089 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2090 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2091 if (has_annotation(_method_LambdaForm_Hidden))
2092 m->set_hidden(true);
2093 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2094 m->set_intrinsic_candidate(true);
2095 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2096 m->set_has_reserved_stack_access(true);
2097 }
2098
2099 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2100 assert(ik != NULL, "invariant");
2101 ik->set_is_contended(is_contended());
2102 }
2103
2104 #define MAX_ARGS_SIZE 255
2105 #define MAX_CODE_SIZE 65535
2106 #define INITIAL_MAX_LVT_NUMBER 256
2107
2108 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2109 *
2110 * Rules for LVT's and LVTT's are:
2111 * - There can be any number of LVT's and LVTT's.
2112 * - If there are n LVT's, it is the same as if there was just
2113 * one LVT containing all the entries from the n LVT's.
2114 * - There may be no more than one LVT entry per local variable.
2115 * Two LVT entries are 'equal' if these fields are the same:
2116 * start_pc, length, name, slot
2117 * - There may be no more than one LVTT entry per each LVT entry.
2118 * Each LVTT entry has to match some LVT entry.
2119 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2120 */
2121 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2122 int lvt_cnt,
2123 u2* const localvariable_table_length,
2124 const u2**const localvariable_table_start,
2125 int lvtt_cnt,
2126 u2* const localvariable_type_table_length,
2127 const u2**const localvariable_type_table_start,
2128 TRAPS) {
2129
2130 ResourceMark rm(THREAD);
2131
2132 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2133 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2134
2135 LVT_HashTable* const table = new LVT_HashTable();
2136
2137 // To fill LocalVariableTable in
2138 const Classfile_LVT_Element* cf_lvt;
2139 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2140
2141 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2142 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2143 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2144 copy_lvt_element(&cf_lvt[idx], lvt);
2145 // If no duplicates, add LVT elem in hashtable.
2146 if (table->put(*lvt, lvt) == false
2147 && _need_verify
2148 && _major_version >= JAVA_1_5_VERSION) {
2149 classfile_parse_error("Duplicated LocalVariableTable attribute "
2150 "entry for '%s' in class file %s",
2151 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2152 CHECK);
2153 }
2154 }
2155 }
2156
2157 // To merge LocalVariableTable and LocalVariableTypeTable
2158 const Classfile_LVT_Element* cf_lvtt;
2159 LocalVariableTableElement lvtt_elem;
2160
2161 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2162 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2163 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2164 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2165 LocalVariableTableElement** entry = table->get(lvtt_elem);
2166 if (entry == NULL) {
2167 if (_need_verify) {
2168 classfile_parse_error("LVTT entry for '%s' in class file %s "
2169 "does not match any LVT entry",
2170 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2171 CHECK);
2172 }
2173 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2174 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2175 "entry for '%s' in class file %s",
2176 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2177 CHECK);
2178 } else {
2179 // to add generic signatures into LocalVariableTable
2180 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2181 }
2182 }
2183 }
2184 }
2185
2186
2187 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2188 const u1* runtime_visible_annotations,
2189 int runtime_visible_annotations_length,
2190 const u1* runtime_invisible_annotations,
2191 int runtime_invisible_annotations_length,
2192 const u1* runtime_visible_parameter_annotations,
2193 int runtime_visible_parameter_annotations_length,
2194 const u1* runtime_invisible_parameter_annotations,
2195 int runtime_invisible_parameter_annotations_length,
2196 const u1* runtime_visible_type_annotations,
2197 int runtime_visible_type_annotations_length,
2198 const u1* runtime_invisible_type_annotations,
2199 int runtime_invisible_type_annotations_length,
2200 const u1* annotation_default,
2201 int annotation_default_length,
2202 TRAPS) {
2203
2204 AnnotationArray* a;
2205
2206 if (runtime_visible_annotations_length +
2207 runtime_invisible_annotations_length > 0) {
2208 a = assemble_annotations(runtime_visible_annotations,
2209 runtime_visible_annotations_length,
2210 runtime_invisible_annotations,
2211 runtime_invisible_annotations_length,
2212 CHECK);
2213 cm->set_method_annotations(a);
2214 }
2215
2216 if (runtime_visible_parameter_annotations_length +
2217 runtime_invisible_parameter_annotations_length > 0) {
2218 a = assemble_annotations(runtime_visible_parameter_annotations,
2219 runtime_visible_parameter_annotations_length,
2220 runtime_invisible_parameter_annotations,
2221 runtime_invisible_parameter_annotations_length,
2222 CHECK);
2223 cm->set_parameter_annotations(a);
2224 }
2225
2226 if (annotation_default_length > 0) {
2227 a = assemble_annotations(annotation_default,
2228 annotation_default_length,
2229 NULL,
2230 0,
2231 CHECK);
2232 cm->set_default_annotations(a);
2233 }
2234
2235 if (runtime_visible_type_annotations_length +
2236 runtime_invisible_type_annotations_length > 0) {
2237 a = assemble_annotations(runtime_visible_type_annotations,
2238 runtime_visible_type_annotations_length,
2239 runtime_invisible_type_annotations,
2240 runtime_invisible_type_annotations_length,
2241 CHECK);
2242 cm->set_type_annotations(a);
2243 }
2244 }
2245
2246
2247 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2248 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2249 // Method* to save footprint, so we only know the size of the resulting Method* when the
2250 // entire method attribute is parsed.
2251 //
2252 // The promoted_flags parameter is used to pass relevant access_flags
2253 // from the method back up to the containing klass. These flag values
2254 // are added to klass's access_flags.
2255
2256 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2257 bool is_interface,
2258 const ConstantPool* cp,
2259 AccessFlags* const promoted_flags,
2260 TRAPS) {
2261 assert(cfs != NULL, "invariant");
2262 assert(cp != NULL, "invariant");
2263 assert(promoted_flags != NULL, "invariant");
2264
2265 ResourceMark rm(THREAD);
2266 // Parse fixed parts:
2267 // access_flags, name_index, descriptor_index, attributes_count
2268 cfs->guarantee_more(8, CHECK_NULL);
2269
2270 int flags = cfs->get_u2_fast();
2271 const u2 name_index = cfs->get_u2_fast();
2272 const int cp_size = cp->length();
2273 check_property(
2274 valid_symbol_at(name_index),
2275 "Illegal constant pool index %u for method name in class file %s",
2276 name_index, CHECK_NULL);
2277 const Symbol* const name = cp->symbol_at(name_index);
2278 verify_legal_method_name(name, CHECK_NULL);
2279
2280 const u2 signature_index = cfs->get_u2_fast();
2281 guarantee_property(
2282 valid_symbol_at(signature_index),
2283 "Illegal constant pool index %u for method signature in class file %s",
2284 signature_index, CHECK_NULL);
2285 const Symbol* const signature = cp->symbol_at(signature_index);
2286
2287 if (name == vmSymbols::class_initializer_name()) {
2288 // We ignore the other access flags for a valid class initializer.
2289 // (JVM Spec 2nd ed., chapter 4.6)
2290 if (_major_version < 51) { // backward compatibility
2291 flags = JVM_ACC_STATIC;
2292 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2293 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2294 } else {
2295 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2296 }
2297 } else {
2298 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2299 }
2300
2301 if (name == vmSymbols::object_initializer_name() && is_interface) {
2302 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2303 }
2304
2305 int args_size = -1; // only used when _need_verify is true
2306 if (_need_verify) {
2307 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2308 verify_legal_method_signature(name, signature, CHECK_NULL);
2309 if (args_size > MAX_ARGS_SIZE) {
2310 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2311 }
2312 }
2313
2314 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2315
2316 // Default values for code and exceptions attribute elements
2317 u2 max_stack = 0;
2318 u2 max_locals = 0;
2319 u4 code_length = 0;
2320 const u1* code_start = 0;
2321 u2 exception_table_length = 0;
2322 const u2* exception_table_start = NULL;
2323 Array<int>* exception_handlers = Universe::the_empty_int_array();
2324 u2 checked_exceptions_length = 0;
2325 const u2* checked_exceptions_start = NULL;
2326 CompressedLineNumberWriteStream* linenumber_table = NULL;
2327 int linenumber_table_length = 0;
2328 int total_lvt_length = 0;
2329 u2 lvt_cnt = 0;
2330 u2 lvtt_cnt = 0;
2331 bool lvt_allocated = false;
2332 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2333 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2334 u2* localvariable_table_length = NULL;
2335 const u2** localvariable_table_start = NULL;
2336 u2* localvariable_type_table_length = NULL;
2337 const u2** localvariable_type_table_start = NULL;
2338 int method_parameters_length = -1;
2339 const u1* method_parameters_data = NULL;
2340 bool method_parameters_seen = false;
2341 bool parsed_code_attribute = false;
2342 bool parsed_checked_exceptions_attribute = false;
2343 bool parsed_stackmap_attribute = false;
2344 // stackmap attribute - JDK1.5
2345 const u1* stackmap_data = NULL;
2346 int stackmap_data_length = 0;
2347 u2 generic_signature_index = 0;
2348 MethodAnnotationCollector parsed_annotations;
2349 const u1* runtime_visible_annotations = NULL;
2350 int runtime_visible_annotations_length = 0;
2351 const u1* runtime_invisible_annotations = NULL;
2352 int runtime_invisible_annotations_length = 0;
2353 const u1* runtime_visible_parameter_annotations = NULL;
2354 int runtime_visible_parameter_annotations_length = 0;
2355 const u1* runtime_invisible_parameter_annotations = NULL;
2356 int runtime_invisible_parameter_annotations_length = 0;
2357 const u1* runtime_visible_type_annotations = NULL;
2358 int runtime_visible_type_annotations_length = 0;
2359 const u1* runtime_invisible_type_annotations = NULL;
2360 int runtime_invisible_type_annotations_length = 0;
2361 bool runtime_invisible_annotations_exists = false;
2362 bool runtime_invisible_type_annotations_exists = false;
2363 bool runtime_invisible_parameter_annotations_exists = false;
2364 const u1* annotation_default = NULL;
2365 int annotation_default_length = 0;
2366
2367 // Parse code and exceptions attribute
2368 u2 method_attributes_count = cfs->get_u2_fast();
2369 while (method_attributes_count--) {
2370 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2371 const u2 method_attribute_name_index = cfs->get_u2_fast();
2372 const u4 method_attribute_length = cfs->get_u4_fast();
2373 check_property(
2374 valid_symbol_at(method_attribute_name_index),
2375 "Invalid method attribute name index %u in class file %s",
2376 method_attribute_name_index, CHECK_NULL);
2377
2378 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2379 if (method_attribute_name == vmSymbols::tag_code()) {
2380 // Parse Code attribute
2381 if (_need_verify) {
2382 guarantee_property(
2383 !access_flags.is_native() && !access_flags.is_abstract(),
2384 "Code attribute in native or abstract methods in class file %s",
2385 CHECK_NULL);
2386 }
2387 if (parsed_code_attribute) {
2388 classfile_parse_error("Multiple Code attributes in class file %s",
2389 CHECK_NULL);
2390 }
2391 parsed_code_attribute = true;
2392
2393 // Stack size, locals size, and code size
2394 if (_major_version == 45 && _minor_version <= 2) {
2395 cfs->guarantee_more(4, CHECK_NULL);
2396 max_stack = cfs->get_u1_fast();
2397 max_locals = cfs->get_u1_fast();
2398 code_length = cfs->get_u2_fast();
2399 } else {
2400 cfs->guarantee_more(8, CHECK_NULL);
2401 max_stack = cfs->get_u2_fast();
2402 max_locals = cfs->get_u2_fast();
2403 code_length = cfs->get_u4_fast();
2404 }
2405 if (_need_verify) {
2406 guarantee_property(args_size <= max_locals,
2407 "Arguments can't fit into locals in class file %s",
2408 CHECK_NULL);
2409 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2410 "Invalid method Code length %u in class file %s",
2411 code_length, CHECK_NULL);
2412 }
2413 // Code pointer
2414 code_start = cfs->get_u1_buffer();
2415 assert(code_start != NULL, "null code start");
2416 cfs->guarantee_more(code_length, CHECK_NULL);
2417 cfs->skip_u1_fast(code_length);
2418
2419 // Exception handler table
2420 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2421 exception_table_length = cfs->get_u2_fast();
2422 if (exception_table_length > 0) {
2423 exception_table_start = parse_exception_table(cfs,
2424 code_length,
2425 exception_table_length,
2426 CHECK_NULL);
2427 }
2428
2429 // Parse additional attributes in code attribute
2430 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2431 u2 code_attributes_count = cfs->get_u2_fast();
2432
2433 unsigned int calculated_attribute_length = 0;
2434
2435 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2436 calculated_attribute_length =
2437 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2438 } else {
2439 // max_stack, locals and length are smaller in pre-version 45.2 classes
2440 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2441 }
2442 calculated_attribute_length +=
2443 code_length +
2444 sizeof(exception_table_length) +
2445 sizeof(code_attributes_count) +
2446 exception_table_length *
2447 ( sizeof(u2) + // start_pc
2448 sizeof(u2) + // end_pc
2449 sizeof(u2) + // handler_pc
2450 sizeof(u2) ); // catch_type_index
2451
2452 while (code_attributes_count--) {
2453 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2454 const u2 code_attribute_name_index = cfs->get_u2_fast();
2455 const u4 code_attribute_length = cfs->get_u4_fast();
2456 calculated_attribute_length += code_attribute_length +
2457 sizeof(code_attribute_name_index) +
2458 sizeof(code_attribute_length);
2459 check_property(valid_symbol_at(code_attribute_name_index),
2460 "Invalid code attribute name index %u in class file %s",
2461 code_attribute_name_index,
2462 CHECK_NULL);
2463 if (LoadLineNumberTables &&
2464 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2465 // Parse and compress line number table
2466 parse_linenumber_table(code_attribute_length,
2467 code_length,
2468 &linenumber_table,
2469 CHECK_NULL);
2470
2471 } else if (LoadLocalVariableTables &&
2472 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2473 // Parse local variable table
2474 if (!lvt_allocated) {
2475 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2476 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2477 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2478 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2479 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2480 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2481 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2482 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2483 lvt_allocated = true;
2484 }
2485 if (lvt_cnt == max_lvt_cnt) {
2486 max_lvt_cnt <<= 1;
2487 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2488 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2489 }
2490 localvariable_table_start[lvt_cnt] =
2491 parse_localvariable_table(cfs,
2492 code_length,
2493 max_locals,
2494 code_attribute_length,
2495 &localvariable_table_length[lvt_cnt],
2496 false, // is not LVTT
2497 CHECK_NULL);
2498 total_lvt_length += localvariable_table_length[lvt_cnt];
2499 lvt_cnt++;
2500 } else if (LoadLocalVariableTypeTables &&
2501 _major_version >= JAVA_1_5_VERSION &&
2502 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2503 if (!lvt_allocated) {
2504 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2505 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2506 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2507 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2508 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2509 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2510 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2511 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2512 lvt_allocated = true;
2513 }
2514 // Parse local variable type table
2515 if (lvtt_cnt == max_lvtt_cnt) {
2516 max_lvtt_cnt <<= 1;
2517 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2518 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2519 }
2520 localvariable_type_table_start[lvtt_cnt] =
2521 parse_localvariable_table(cfs,
2522 code_length,
2523 max_locals,
2524 code_attribute_length,
2525 &localvariable_type_table_length[lvtt_cnt],
2526 true, // is LVTT
2527 CHECK_NULL);
2528 lvtt_cnt++;
2529 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2530 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2531 // Stack map is only needed by the new verifier in JDK1.5.
2532 if (parsed_stackmap_attribute) {
2533 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2534 }
2535 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2536 stackmap_data_length = code_attribute_length;
2537 parsed_stackmap_attribute = true;
2538 } else {
2539 // Skip unknown attributes
2540 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2541 }
2542 }
2543 // check method attribute length
2544 if (_need_verify) {
2545 guarantee_property(method_attribute_length == calculated_attribute_length,
2546 "Code segment has wrong length in class file %s",
2547 CHECK_NULL);
2548 }
2549 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2550 // Parse Exceptions attribute
2551 if (parsed_checked_exceptions_attribute) {
2552 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2553 CHECK_NULL);
2554 }
2555 parsed_checked_exceptions_attribute = true;
2556 checked_exceptions_start =
2557 parse_checked_exceptions(cfs,
2558 &checked_exceptions_length,
2559 method_attribute_length,
2560 CHECK_NULL);
2561 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2562 // reject multiple method parameters
2563 if (method_parameters_seen) {
2564 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2565 CHECK_NULL);
2566 }
2567 method_parameters_seen = true;
2568 method_parameters_length = cfs->get_u1_fast();
2569 const u2 real_length = (method_parameters_length * 4u) + 1u;
2570 if (method_attribute_length != real_length) {
2571 classfile_parse_error(
2572 "Invalid MethodParameters method attribute length %u in class file",
2573 method_attribute_length, CHECK_NULL);
2574 }
2575 method_parameters_data = cfs->get_u1_buffer();
2576 cfs->skip_u2_fast(method_parameters_length);
2577 cfs->skip_u2_fast(method_parameters_length);
2578 // ignore this attribute if it cannot be reflected
2579 if (!SystemDictionary::Parameter_klass_loaded())
2580 method_parameters_length = -1;
2581 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2582 if (method_attribute_length != 0) {
2583 classfile_parse_error(
2584 "Invalid Synthetic method attribute length %u in class file %s",
2585 method_attribute_length, CHECK_NULL);
2586 }
2587 // Should we check that there hasn't already been a synthetic attribute?
2588 access_flags.set_is_synthetic();
2589 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2590 if (method_attribute_length != 0) {
2591 classfile_parse_error(
2592 "Invalid Deprecated method attribute length %u in class file %s",
2593 method_attribute_length, CHECK_NULL);
2594 }
2595 } else if (_major_version >= JAVA_1_5_VERSION) {
2596 if (method_attribute_name == vmSymbols::tag_signature()) {
2597 if (generic_signature_index != 0) {
2598 classfile_parse_error(
2599 "Multiple Signature attributes for method in class file %s",
2600 CHECK_NULL);
2601 }
2602 if (method_attribute_length != 2) {
2603 classfile_parse_error(
2604 "Invalid Signature attribute length %u in class file %s",
2605 method_attribute_length, CHECK_NULL);
2606 }
2607 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2608 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2609 if (runtime_visible_annotations != NULL) {
2610 classfile_parse_error(
2611 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2612 CHECK_NULL);
2613 }
2614 runtime_visible_annotations_length = method_attribute_length;
2615 runtime_visible_annotations = cfs->get_u1_buffer();
2616 assert(runtime_visible_annotations != NULL, "null visible annotations");
2617 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2618 parse_annotations(cp,
2619 runtime_visible_annotations,
2620 runtime_visible_annotations_length,
2621 &parsed_annotations,
2622 _loader_data,
2623 CHECK_NULL);
2624 cfs->skip_u1_fast(runtime_visible_annotations_length);
2625 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2626 if (runtime_invisible_annotations_exists) {
2627 classfile_parse_error(
2628 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2629 CHECK_NULL);
2630 }
2631 runtime_invisible_annotations_exists = true;
2632 if (PreserveAllAnnotations) {
2633 runtime_invisible_annotations_length = method_attribute_length;
2634 runtime_invisible_annotations = cfs->get_u1_buffer();
2635 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2636 }
2637 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2638 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2639 if (runtime_visible_parameter_annotations != NULL) {
2640 classfile_parse_error(
2641 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2642 CHECK_NULL);
2643 }
2644 runtime_visible_parameter_annotations_length = method_attribute_length;
2645 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2646 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2647 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2648 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2649 if (runtime_invisible_parameter_annotations_exists) {
2650 classfile_parse_error(
2651 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2652 CHECK_NULL);
2653 }
2654 runtime_invisible_parameter_annotations_exists = true;
2655 if (PreserveAllAnnotations) {
2656 runtime_invisible_parameter_annotations_length = method_attribute_length;
2657 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2658 assert(runtime_invisible_parameter_annotations != NULL,
2659 "null invisible parameter annotations");
2660 }
2661 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2662 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2663 if (annotation_default != NULL) {
2664 classfile_parse_error(
2665 "Multiple AnnotationDefault attributes for method in class file %s",
2666 CHECK_NULL);
2667 }
2668 annotation_default_length = method_attribute_length;
2669 annotation_default = cfs->get_u1_buffer();
2670 assert(annotation_default != NULL, "null annotation default");
2671 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2672 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2673 if (runtime_visible_type_annotations != NULL) {
2674 classfile_parse_error(
2675 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2676 CHECK_NULL);
2677 }
2678 runtime_visible_type_annotations_length = method_attribute_length;
2679 runtime_visible_type_annotations = cfs->get_u1_buffer();
2680 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2681 // No need for the VM to parse Type annotations
2682 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2683 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2684 if (runtime_invisible_type_annotations_exists) {
2685 classfile_parse_error(
2686 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2687 CHECK_NULL);
2688 } else {
2689 runtime_invisible_type_annotations_exists = true;
2690 }
2691 if (PreserveAllAnnotations) {
2692 runtime_invisible_type_annotations_length = method_attribute_length;
2693 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2694 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2695 }
2696 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2697 } else {
2698 // Skip unknown attributes
2699 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2700 }
2701 } else {
2702 // Skip unknown attributes
2703 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2704 }
2705 }
2706
2707 if (linenumber_table != NULL) {
2708 linenumber_table->write_terminator();
2709 linenumber_table_length = linenumber_table->position();
2710 }
2711
2712 // Make sure there's at least one Code attribute in non-native/non-abstract method
2713 if (_need_verify) {
2714 guarantee_property(access_flags.is_native() ||
2715 access_flags.is_abstract() ||
2716 parsed_code_attribute,
2717 "Absent Code attribute in method that is not native or abstract in class file %s",
2718 CHECK_NULL);
2719 }
2720
2721 // All sizing information for a Method* is finally available, now create it
2722 InlineTableSizes sizes(
2723 total_lvt_length,
2724 linenumber_table_length,
2725 exception_table_length,
2726 checked_exceptions_length,
2727 method_parameters_length,
2728 generic_signature_index,
2729 runtime_visible_annotations_length +
2730 runtime_invisible_annotations_length,
2731 runtime_visible_parameter_annotations_length +
2732 runtime_invisible_parameter_annotations_length,
2733 runtime_visible_type_annotations_length +
2734 runtime_invisible_type_annotations_length,
2735 annotation_default_length,
2736 0);
2737
2738 Method* const m = Method::allocate(_loader_data,
2739 code_length,
2740 access_flags,
2741 &sizes,
2742 ConstMethod::NORMAL,
2743 CHECK_NULL);
2744
2745 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2746
2747 // Fill in information from fixed part (access_flags already set)
2748 m->set_constants(_cp);
2749 m->set_name_index(name_index);
2750 m->set_signature_index(signature_index);
2751
2752 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2753 m->constMethod()->set_result_type(rtf.type());
2754
2755 if (args_size >= 0) {
2756 m->set_size_of_parameters(args_size);
2757 } else {
2758 m->compute_size_of_parameters(THREAD);
2759 }
2760 #ifdef ASSERT
2761 if (args_size >= 0) {
2762 m->compute_size_of_parameters(THREAD);
2763 assert(args_size == m->size_of_parameters(), "");
2764 }
2765 #endif
2766
2767 // Fill in code attribute information
2768 m->set_max_stack(max_stack);
2769 m->set_max_locals(max_locals);
2770 if (stackmap_data != NULL) {
2771 m->constMethod()->copy_stackmap_data(_loader_data,
2772 (u1*)stackmap_data,
2773 stackmap_data_length,
2774 CHECK_NULL);
2775 }
2776
2777 // Copy byte codes
2778 m->set_code((u1*)code_start);
2779
2780 // Copy line number table
2781 if (linenumber_table != NULL) {
2782 memcpy(m->compressed_linenumber_table(),
2783 linenumber_table->buffer(),
2784 linenumber_table_length);
2785 }
2786
2787 // Copy exception table
2788 if (exception_table_length > 0) {
2789 int size =
2790 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2791 copy_u2_with_conversion((u2*) m->exception_table_start(),
2792 exception_table_start, size);
2793 }
2794
2795 // Copy method parameters
2796 if (method_parameters_length > 0) {
2797 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2798 for (int i = 0; i < method_parameters_length; i++) {
2799 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2800 method_parameters_data += 2;
2801 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2802 method_parameters_data += 2;
2803 }
2804 }
2805
2806 // Copy checked exceptions
2807 if (checked_exceptions_length > 0) {
2808 const int size =
2809 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2810 copy_u2_with_conversion((u2*) m->checked_exceptions_start(),
2811 checked_exceptions_start,
2812 size);
2813 }
2814
2815 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2816 if (total_lvt_length > 0) {
2817 promoted_flags->set_has_localvariable_table();
2818 copy_localvariable_table(m->constMethod(),
2819 lvt_cnt,
2820 localvariable_table_length,
2821 localvariable_table_start,
2822 lvtt_cnt,
2823 localvariable_type_table_length,
2824 localvariable_type_table_start,
2825 CHECK_NULL);
2826 }
2827
2828 if (parsed_annotations.has_any_annotations())
2829 parsed_annotations.apply_to(m);
2830
2831 // Copy annotations
2832 copy_method_annotations(m->constMethod(),
2833 runtime_visible_annotations,
2834 runtime_visible_annotations_length,
2835 runtime_invisible_annotations,
2836 runtime_invisible_annotations_length,
2837 runtime_visible_parameter_annotations,
2838 runtime_visible_parameter_annotations_length,
2839 runtime_invisible_parameter_annotations,
2840 runtime_invisible_parameter_annotations_length,
2841 runtime_visible_type_annotations,
2842 runtime_visible_type_annotations_length,
2843 runtime_invisible_type_annotations,
2844 runtime_invisible_type_annotations_length,
2845 annotation_default,
2846 annotation_default_length,
2847 CHECK_NULL);
2848
2849 if (name == vmSymbols::finalize_method_name() &&
2850 signature == vmSymbols::void_method_signature()) {
2851 if (m->is_empty_method()) {
2852 _has_empty_finalizer = true;
2853 } else {
2854 _has_finalizer = true;
2855 }
2856 }
2857 if (name == vmSymbols::object_initializer_name() &&
2858 signature == vmSymbols::void_method_signature() &&
2859 m->is_vanilla_constructor()) {
2860 _has_vanilla_constructor = true;
2861 }
2862
2863 NOT_PRODUCT(m->verify());
2864 return m;
2865 }
2866
2867
2868 // The promoted_flags parameter is used to pass relevant access_flags
2869 // from the methods back up to the containing klass. These flag values
2870 // are added to klass's access_flags.
2871 // Side-effects: populates the _methods field in the parser
2872 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2873 bool is_interface,
2874 AccessFlags* promoted_flags,
2875 bool* has_final_method,
2876 bool* declares_nonstatic_concrete_methods,
2877 TRAPS) {
2878 assert(cfs != NULL, "invariant");
2879 assert(promoted_flags != NULL, "invariant");
2880 assert(has_final_method != NULL, "invariant");
2881 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2882
2883 assert(NULL == _methods, "invariant");
2884
2885 cfs->guarantee_more(2, CHECK); // length
2886 const u2 length = cfs->get_u2_fast();
2887 if (length == 0) {
2888 _methods = Universe::the_empty_method_array();
2889 } else {
2890 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2891 length,
2892 NULL,
2893 CHECK);
2894
2895 for (int index = 0; index < length; index++) {
2896 Method* method = parse_method(cfs,
2897 is_interface,
2898 _cp,
2899 promoted_flags,
2900 CHECK);
2901
2902 if (method->is_final()) {
2903 *has_final_method = true;
2904 }
2905 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2906 // used for interface initialization, and default method inheritance analysis
2907 if (is_interface && !(*declares_nonstatic_concrete_methods)
2908 && !method->is_abstract() && !method->is_static()) {
2909 *declares_nonstatic_concrete_methods = true;
2910 }
2911 _methods->at_put(index, method);
2912 }
2913
2914 if (_need_verify && length > 1) {
2915 // Check duplicated methods
2916 ResourceMark rm(THREAD);
2917 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2918 THREAD, NameSigHash*, HASH_ROW_SIZE);
2919 initialize_hashtable(names_and_sigs);
2920 bool dup = false;
2921 const Symbol* name = NULL;
2922 const Symbol* sig = NULL;
2923 {
2924 debug_only(NoSafepointVerifier nsv;)
2925 for (int i = 0; i < length; i++) {
2926 const Method* const m = _methods->at(i);
2927 name = m->name();
2928 sig = m->signature();
2929 // If no duplicates, add name/signature in hashtable names_and_sigs.
2930 if (!put_after_lookup(name, sig, names_and_sigs)) {
2931 dup = true;
2932 break;
2933 }
2934 }
2935 }
2936 if (dup) {
2937 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2938 name->as_C_string(), sig->as_klass_external_name(), CHECK);
2939 }
2940 }
2941 }
2942 }
2943
2944 static const intArray* sort_methods(Array<Method*>* methods) {
2945 const int length = methods->length();
2946 // If JVMTI original method ordering or sharing is enabled we have to
2947 // remember the original class file ordering.
2948 // We temporarily use the vtable_index field in the Method* to store the
2949 // class file index, so we can read in after calling qsort.
2950 // Put the method ordering in the shared archive.
2951 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2952 for (int index = 0; index < length; index++) {
2953 Method* const m = methods->at(index);
2954 assert(!m->valid_vtable_index(), "vtable index should not be set");
2955 m->set_vtable_index(index);
2956 }
2957 }
2958 // Sort method array by ascending method name (for faster lookups & vtable construction)
2959 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2960 Method::sort_methods(methods);
2961
2962 intArray* method_ordering = NULL;
2963 // If JVMTI original method ordering or sharing is enabled construct int
2964 // array remembering the original ordering
2965 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2966 method_ordering = new intArray(length, length, -1);
2967 for (int index = 0; index < length; index++) {
2968 Method* const m = methods->at(index);
2969 const int old_index = m->vtable_index();
2970 assert(old_index >= 0 && old_index < length, "invalid method index");
2971 method_ordering->at_put(index, old_index);
2972 m->set_vtable_index(Method::invalid_vtable_index);
2973 }
2974 }
2975 return method_ordering;
2976 }
2977
2978 // Parse generic_signature attribute for methods and fields
2979 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2980 TRAPS) {
2981 assert(cfs != NULL, "invariant");
2982
2983 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2984 const u2 generic_signature_index = cfs->get_u2_fast();
2985 check_property(
2986 valid_symbol_at(generic_signature_index),
2987 "Invalid Signature attribute at constant pool index %u in class file %s",
2988 generic_signature_index, CHECK_0);
2989 return generic_signature_index;
2990 }
2991
2992 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2993 TRAPS) {
2994
2995 assert(cfs != NULL, "invariant");
2996
2997 cfs->guarantee_more(2, CHECK); // sourcefile_index
2998 const u2 sourcefile_index = cfs->get_u2_fast();
2999 check_property(
3000 valid_symbol_at(sourcefile_index),
3001 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3002 sourcefile_index, CHECK);
3003 set_class_sourcefile_index(sourcefile_index);
3004 }
3005
3006 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3007 int length,
3008 TRAPS) {
3009 assert(cfs != NULL, "invariant");
3010
3011 const u1* const sde_buffer = cfs->get_u1_buffer();
3012 assert(sde_buffer != NULL, "null sde buffer");
3013
3014 // Don't bother storing it if there is no way to retrieve it
3015 if (JvmtiExport::can_get_source_debug_extension()) {
3016 assert((length+1) > length, "Overflow checking");
3017 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3018 for (int i = 0; i < length; i++) {
3019 sde[i] = sde_buffer[i];
3020 }
3021 sde[length] = '\0';
3022 set_class_sde_buffer((const char*)sde, length);
3023 }
3024 // Got utf8 string, set stream position forward
3025 cfs->skip_u1(length, CHECK);
3026 }
3027
3028
3029 // Inner classes can be static, private or protected (classic VM does this)
3030 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3031 JVM_ACC_PRIVATE | \
3032 JVM_ACC_PROTECTED | \
3033 JVM_ACC_STATIC \
3034 )
3035
3036 // Return number of classes in the inner classes attribute table
3037 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3038 const u1* const inner_classes_attribute_start,
3039 bool parsed_enclosingmethod_attribute,
3040 u2 enclosing_method_class_index,
3041 u2 enclosing_method_method_index,
3042 TRAPS) {
3043 const u1* const current_mark = cfs->current();
3044 u2 length = 0;
3045 if (inner_classes_attribute_start != NULL) {
3046 cfs->set_current(inner_classes_attribute_start);
3047 cfs->guarantee_more(2, CHECK_0); // length
3048 length = cfs->get_u2_fast();
3049 }
3050
3051 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3052 // method data:
3053 // [inner_class_info_index,
3054 // outer_class_info_index,
3055 // inner_name_index,
3056 // inner_class_access_flags,
3057 // ...
3058 // enclosing_method_class_index,
3059 // enclosing_method_method_index]
3060 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3061 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3062 _inner_classes = inner_classes;
3063
3064 int index = 0;
3065 const int cp_size = _cp->length();
3066 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3067 for (int n = 0; n < length; n++) {
3068 // Inner class index
3069 const u2 inner_class_info_index = cfs->get_u2_fast();
3070 check_property(
3071 valid_klass_reference_at(inner_class_info_index),
3072 "inner_class_info_index %u has bad constant type in class file %s",
3073 inner_class_info_index, CHECK_0);
3074 // Outer class index
3075 const u2 outer_class_info_index = cfs->get_u2_fast();
3076 check_property(
3077 outer_class_info_index == 0 ||
3078 valid_klass_reference_at(outer_class_info_index),
3079 "outer_class_info_index %u has bad constant type in class file %s",
3080 outer_class_info_index, CHECK_0);
3081 // Inner class name
3082 const u2 inner_name_index = cfs->get_u2_fast();
3083 check_property(
3084 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3085 "inner_name_index %u has bad constant type in class file %s",
3086 inner_name_index, CHECK_0);
3087 if (_need_verify) {
3088 guarantee_property(inner_class_info_index != outer_class_info_index,
3089 "Class is both outer and inner class in class file %s", CHECK_0);
3090 }
3091 // Access flags
3092 jint flags;
3093 // JVM_ACC_MODULE is defined in JDK-9 and later.
3094 if (_major_version >= JAVA_9_VERSION) {
3095 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3096 } else {
3097 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3098 }
3099 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3100 // Set abstract bit for old class files for backward compatibility
3101 flags |= JVM_ACC_ABSTRACT;
3102 }
3103 verify_legal_class_modifiers(flags, CHECK_0);
3104 AccessFlags inner_access_flags(flags);
3105
3106 inner_classes->at_put(index++, inner_class_info_index);
3107 inner_classes->at_put(index++, outer_class_info_index);
3108 inner_classes->at_put(index++, inner_name_index);
3109 inner_classes->at_put(index++, inner_access_flags.as_short());
3110 }
3111
3112 // 4347400: make sure there's no duplicate entry in the classes array
3113 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3114 for(int i = 0; i < length * 4; i += 4) {
3115 for(int j = i + 4; j < length * 4; j += 4) {
3116 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3117 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3118 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3119 inner_classes->at(i+3) != inner_classes->at(j+3)),
3120 "Duplicate entry in InnerClasses in class file %s",
3121 CHECK_0);
3122 }
3123 }
3124 }
3125
3126 // Set EnclosingMethod class and method indexes.
3127 if (parsed_enclosingmethod_attribute) {
3128 inner_classes->at_put(index++, enclosing_method_class_index);
3129 inner_classes->at_put(index++, enclosing_method_method_index);
3130 }
3131 assert(index == size, "wrong size");
3132
3133 // Restore buffer's current position.
3134 cfs->set_current(current_mark);
3135
3136 return length;
3137 }
3138
3139 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3140 set_class_synthetic_flag(true);
3141 }
3142
3143 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3144 assert(cfs != NULL, "invariant");
3145
3146 const u2 signature_index = cfs->get_u2(CHECK);
3147 check_property(
3148 valid_symbol_at(signature_index),
3149 "Invalid constant pool index %u in Signature attribute in class file %s",
3150 signature_index, CHECK);
3151 set_class_generic_signature_index(signature_index);
3152 }
3153
3154 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3155 ConstantPool* cp,
3156 u4 attribute_byte_length,
3157 TRAPS) {
3158 assert(cfs != NULL, "invariant");
3159 assert(cp != NULL, "invariant");
3160
3161 const u1* const current_start = cfs->current();
3162
3163 guarantee_property(attribute_byte_length >= sizeof(u2),
3164 "Invalid BootstrapMethods attribute length %u in class file %s",
3165 attribute_byte_length,
3166 CHECK);
3167
3168 cfs->guarantee_more(attribute_byte_length, CHECK);
3169
3170 const int attribute_array_length = cfs->get_u2_fast();
3171
3172 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3173 "Short length on BootstrapMethods in class file %s",
3174 CHECK);
3175
3176
3177 // The attribute contains a counted array of counted tuples of shorts,
3178 // represending bootstrap specifiers:
3179 // length*{bootstrap_method_index, argument_count*{argument_index}}
3180 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3181 // operand_count = number of shorts in attr, except for leading length
3182
3183 // The attribute is copied into a short[] array.
3184 // The array begins with a series of short[2] pairs, one for each tuple.
3185 const int index_size = (attribute_array_length * 2);
3186
3187 Array<u2>* const operands =
3188 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3189
3190 // Eagerly assign operands so they will be deallocated with the constant
3191 // pool if there is an error.
3192 cp->set_operands(operands);
3193
3194 int operand_fill_index = index_size;
3195 const int cp_size = cp->length();
3196
3197 for (int n = 0; n < attribute_array_length; n++) {
3198 // Store a 32-bit offset into the header of the operand array.
3199 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3200
3201 // Read a bootstrap specifier.
3202 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3203 const u2 bootstrap_method_index = cfs->get_u2_fast();
3204 const u2 argument_count = cfs->get_u2_fast();
3205 check_property(
3206 valid_cp_range(bootstrap_method_index, cp_size) &&
3207 cp->tag_at(bootstrap_method_index).is_method_handle(),
3208 "bootstrap_method_index %u has bad constant type in class file %s",
3209 bootstrap_method_index,
3210 CHECK);
3211
3212 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3213 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3214 CHECK);
3215
3216 operands->at_put(operand_fill_index++, bootstrap_method_index);
3217 operands->at_put(operand_fill_index++, argument_count);
3218
3219 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3220 for (int j = 0; j < argument_count; j++) {
3221 const u2 argument_index = cfs->get_u2_fast();
3222 check_property(
3223 valid_cp_range(argument_index, cp_size) &&
3224 cp->tag_at(argument_index).is_loadable_constant(),
3225 "argument_index %u has bad constant type in class file %s",
3226 argument_index,
3227 CHECK);
3228 operands->at_put(operand_fill_index++, argument_index);
3229 }
3230 }
3231 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3232 "Bad length on BootstrapMethods in class file %s",
3233 CHECK);
3234 }
3235
3236 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3237 ConstantPool* cp,
3238 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3239 TRAPS) {
3240 assert(cfs != NULL, "invariant");
3241 assert(cp != NULL, "invariant");
3242 assert(parsed_annotations != NULL, "invariant");
3243
3244 // Set inner classes attribute to default sentinel
3245 _inner_classes = Universe::the_empty_short_array();
3246 cfs->guarantee_more(2, CHECK); // attributes_count
3247 u2 attributes_count = cfs->get_u2_fast();
3248 bool parsed_sourcefile_attribute = false;
3249 bool parsed_innerclasses_attribute = false;
3250 bool parsed_enclosingmethod_attribute = false;
3251 bool parsed_bootstrap_methods_attribute = false;
3252 const u1* runtime_visible_annotations = NULL;
3253 int runtime_visible_annotations_length = 0;
3254 const u1* runtime_invisible_annotations = NULL;
3255 int runtime_invisible_annotations_length = 0;
3256 const u1* runtime_visible_type_annotations = NULL;
3257 int runtime_visible_type_annotations_length = 0;
3258 const u1* runtime_invisible_type_annotations = NULL;
3259 int runtime_invisible_type_annotations_length = 0;
3260 bool runtime_invisible_type_annotations_exists = false;
3261 bool runtime_invisible_annotations_exists = false;
3262 bool parsed_source_debug_ext_annotations_exist = false;
3263 const u1* inner_classes_attribute_start = NULL;
3264 u4 inner_classes_attribute_length = 0;
3265 u2 enclosing_method_class_index = 0;
3266 u2 enclosing_method_method_index = 0;
3267 // Iterate over attributes
3268 while (attributes_count--) {
3269 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3270 const u2 attribute_name_index = cfs->get_u2_fast();
3271 const u4 attribute_length = cfs->get_u4_fast();
3272 check_property(
3273 valid_symbol_at(attribute_name_index),
3274 "Attribute name has bad constant pool index %u in class file %s",
3275 attribute_name_index, CHECK);
3276 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3277 if (tag == vmSymbols::tag_source_file()) {
3278 // Check for SourceFile tag
3279 if (_need_verify) {
3280 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3281 }
3282 if (parsed_sourcefile_attribute) {
3283 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3284 } else {
3285 parsed_sourcefile_attribute = true;
3286 }
3287 parse_classfile_sourcefile_attribute(cfs, CHECK);
3288 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3289 // Check for SourceDebugExtension tag
3290 if (parsed_source_debug_ext_annotations_exist) {
3291 classfile_parse_error(
3292 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3293 }
3294 parsed_source_debug_ext_annotations_exist = true;
3295 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3296 } else if (tag == vmSymbols::tag_inner_classes()) {
3297 // Check for InnerClasses tag
3298 if (parsed_innerclasses_attribute) {
3299 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3300 } else {
3301 parsed_innerclasses_attribute = true;
3302 }
3303 inner_classes_attribute_start = cfs->get_u1_buffer();
3304 inner_classes_attribute_length = attribute_length;
3305 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3306 } else if (tag == vmSymbols::tag_synthetic()) {
3307 // Check for Synthetic tag
3308 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3309 if (attribute_length != 0) {
3310 classfile_parse_error(
3311 "Invalid Synthetic classfile attribute length %u in class file %s",
3312 attribute_length, CHECK);
3313 }
3314 parse_classfile_synthetic_attribute(CHECK);
3315 } else if (tag == vmSymbols::tag_deprecated()) {
3316 // Check for Deprecatd tag - 4276120
3317 if (attribute_length != 0) {
3318 classfile_parse_error(
3319 "Invalid Deprecated classfile attribute length %u in class file %s",
3320 attribute_length, CHECK);
3321 }
3322 } else if (_major_version >= JAVA_1_5_VERSION) {
3323 if (tag == vmSymbols::tag_signature()) {
3324 if (_generic_signature_index != 0) {
3325 classfile_parse_error(
3326 "Multiple Signature attributes in class file %s", CHECK);
3327 }
3328 if (attribute_length != 2) {
3329 classfile_parse_error(
3330 "Wrong Signature attribute length %u in class file %s",
3331 attribute_length, CHECK);
3332 }
3333 parse_classfile_signature_attribute(cfs, CHECK);
3334 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3335 if (runtime_visible_annotations != NULL) {
3336 classfile_parse_error(
3337 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3338 }
3339 runtime_visible_annotations_length = attribute_length;
3340 runtime_visible_annotations = cfs->get_u1_buffer();
3341 assert(runtime_visible_annotations != NULL, "null visible annotations");
3342 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3343 parse_annotations(cp,
3344 runtime_visible_annotations,
3345 runtime_visible_annotations_length,
3346 parsed_annotations,
3347 _loader_data,
3348 CHECK);
3349 cfs->skip_u1_fast(runtime_visible_annotations_length);
3350 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3351 if (runtime_invisible_annotations_exists) {
3352 classfile_parse_error(
3353 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3354 }
3355 runtime_invisible_annotations_exists = true;
3356 if (PreserveAllAnnotations) {
3357 runtime_invisible_annotations_length = attribute_length;
3358 runtime_invisible_annotations = cfs->get_u1_buffer();
3359 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3360 }
3361 cfs->skip_u1(attribute_length, CHECK);
3362 } else if (tag == vmSymbols::tag_enclosing_method()) {
3363 if (parsed_enclosingmethod_attribute) {
3364 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3365 } else {
3366 parsed_enclosingmethod_attribute = true;
3367 }
3368 guarantee_property(attribute_length == 4,
3369 "Wrong EnclosingMethod attribute length %u in class file %s",
3370 attribute_length, CHECK);
3371 cfs->guarantee_more(4, CHECK); // class_index, method_index
3372 enclosing_method_class_index = cfs->get_u2_fast();
3373 enclosing_method_method_index = cfs->get_u2_fast();
3374 if (enclosing_method_class_index == 0) {
3375 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3376 }
3377 // Validate the constant pool indices and types
3378 check_property(valid_klass_reference_at(enclosing_method_class_index),
3379 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3380 if (enclosing_method_method_index != 0 &&
3381 (!cp->is_within_bounds(enclosing_method_method_index) ||
3382 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3383 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3384 }
3385 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3386 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3387 if (parsed_bootstrap_methods_attribute) {
3388 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3389 }
3390 parsed_bootstrap_methods_attribute = true;
3391 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3392 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3393 if (runtime_visible_type_annotations != NULL) {
3394 classfile_parse_error(
3395 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3396 }
3397 runtime_visible_type_annotations_length = attribute_length;
3398 runtime_visible_type_annotations = cfs->get_u1_buffer();
3399 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3400 // No need for the VM to parse Type annotations
3401 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3402 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3403 if (runtime_invisible_type_annotations_exists) {
3404 classfile_parse_error(
3405 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3406 } else {
3407 runtime_invisible_type_annotations_exists = true;
3408 }
3409 if (PreserveAllAnnotations) {
3410 runtime_invisible_type_annotations_length = attribute_length;
3411 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3412 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3413 }
3414 cfs->skip_u1(attribute_length, CHECK);
3415 } else {
3416 // Unknown attribute
3417 cfs->skip_u1(attribute_length, CHECK);
3418 }
3419 } else {
3420 // Unknown attribute
3421 cfs->skip_u1(attribute_length, CHECK);
3422 }
3423 }
3424 _annotations = assemble_annotations(runtime_visible_annotations,
3425 runtime_visible_annotations_length,
3426 runtime_invisible_annotations,
3427 runtime_invisible_annotations_length,
3428 CHECK);
3429 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3430 runtime_visible_type_annotations_length,
3431 runtime_invisible_type_annotations,
3432 runtime_invisible_type_annotations_length,
3433 CHECK);
3434
3435 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3436 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3437 cfs,
3438 inner_classes_attribute_start,
3439 parsed_innerclasses_attribute,
3440 enclosing_method_class_index,
3441 enclosing_method_method_index,
3442 CHECK);
3443 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3444 guarantee_property(
3445 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3446 "Wrong InnerClasses attribute length in class file %s", CHECK);
3447 }
3448 }
3449
3450 if (_max_bootstrap_specifier_index >= 0) {
3451 guarantee_property(parsed_bootstrap_methods_attribute,
3452 "Missing BootstrapMethods attribute in class file %s", CHECK);
3453 }
3454 }
3455
3456 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3457 assert(k != NULL, "invariant");
3458
3459 if (_synthetic_flag)
3460 k->set_is_synthetic();
3461 if (_sourcefile_index != 0) {
3462 k->set_source_file_name_index(_sourcefile_index);
3463 }
3464 if (_generic_signature_index != 0) {
3465 k->set_generic_signature_index(_generic_signature_index);
3466 }
3467 if (_sde_buffer != NULL) {
3468 k->set_source_debug_extension(_sde_buffer, _sde_length);
3469 }
3470 }
3471
3472 // Create the Annotations object that will
3473 // hold the annotations array for the Klass.
3474 void ClassFileParser::create_combined_annotations(TRAPS) {
3475 if (_annotations == NULL &&
3476 _type_annotations == NULL &&
3477 _fields_annotations == NULL &&
3478 _fields_type_annotations == NULL) {
3479 // Don't create the Annotations object unnecessarily.
3480 return;
3481 }
3482
3483 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3484 annotations->set_class_annotations(_annotations);
3485 annotations->set_class_type_annotations(_type_annotations);
3486 annotations->set_fields_annotations(_fields_annotations);
3487 annotations->set_fields_type_annotations(_fields_type_annotations);
3488
3489 // This is the Annotations object that will be
3490 // assigned to InstanceKlass being constructed.
3491 _combined_annotations = annotations;
3492
3493 // The annotations arrays below has been transfered the
3494 // _combined_annotations so these fields can now be cleared.
3495 _annotations = NULL;
3496 _type_annotations = NULL;
3497 _fields_annotations = NULL;
3498 _fields_type_annotations = NULL;
3499 }
3500
3501 // Transfer ownership of metadata allocated to the InstanceKlass.
3502 void ClassFileParser::apply_parsed_class_metadata(
3503 InstanceKlass* this_klass,
3504 int java_fields_count, TRAPS) {
3505 assert(this_klass != NULL, "invariant");
3506
3507 _cp->set_pool_holder(this_klass);
3508 this_klass->set_constants(_cp);
3509 this_klass->set_fields(_fields, java_fields_count);
3510 this_klass->set_methods(_methods);
3511 this_klass->set_inner_classes(_inner_classes);
3512 this_klass->set_local_interfaces(_local_interfaces);
3513 this_klass->set_transitive_interfaces(_transitive_interfaces);
3514 this_klass->set_annotations(_combined_annotations);
3515
3516 // Clear out these fields so they don't get deallocated by the destructor
3517 clear_class_metadata();
3518 }
3519
3520 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3521 int runtime_visible_annotations_length,
3522 const u1* const runtime_invisible_annotations,
3523 int runtime_invisible_annotations_length,
3524 TRAPS) {
3525 AnnotationArray* annotations = NULL;
3526 if (runtime_visible_annotations != NULL ||
3527 runtime_invisible_annotations != NULL) {
3528 annotations = MetadataFactory::new_array<u1>(_loader_data,
3529 runtime_visible_annotations_length +
3530 runtime_invisible_annotations_length,
3531 CHECK_(annotations));
3532 if (runtime_visible_annotations != NULL) {
3533 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3534 annotations->at_put(i, runtime_visible_annotations[i]);
3535 }
3536 }
3537 if (runtime_invisible_annotations != NULL) {
3538 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3539 int append = runtime_visible_annotations_length+i;
3540 annotations->at_put(append, runtime_invisible_annotations[i]);
3541 }
3542 }
3543 }
3544 return annotations;
3545 }
3546
3547 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3548 const int super_class_index,
3549 const bool need_verify,
3550 TRAPS) {
3551 assert(cp != NULL, "invariant");
3552 const InstanceKlass* super_klass = NULL;
3553
3554 if (super_class_index == 0) {
3555 check_property(_class_name == vmSymbols::java_lang_Object(),
3556 "Invalid superclass index %u in class file %s",
3557 super_class_index,
3558 CHECK_NULL);
3559 } else {
3560 check_property(valid_klass_reference_at(super_class_index),
3561 "Invalid superclass index %u in class file %s",
3562 super_class_index,
3563 CHECK_NULL);
3564 // The class name should be legal because it is checked when parsing constant pool.
3565 // However, make sure it is not an array type.
3566 bool is_array = false;
3567 if (cp->tag_at(super_class_index).is_klass()) {
3568 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3569 if (need_verify)
3570 is_array = super_klass->is_array_klass();
3571 } else if (need_verify) {
3572 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3573 }
3574 if (need_verify) {
3575 guarantee_property(!is_array,
3576 "Bad superclass name in class file %s", CHECK_NULL);
3577 }
3578 }
3579 return super_klass;
3580 }
3581
3582 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3583 unsigned int nonstatic_oop_map_count,
3584 int first_nonstatic_oop_offset) {
3585
3586 unsigned int map_count =
3587 NULL == super ? 0 : super->nonstatic_oop_map_count();
3588 if (nonstatic_oop_map_count > 0) {
3589 // We have oops to add to map
3590 if (map_count == 0) {
3591 map_count = nonstatic_oop_map_count;
3592 }
3593 else {
3594 // Check whether we should add a new map block or whether the last one can
3595 // be extended
3596 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3597 const OopMapBlock* const last_map = first_map + map_count - 1;
3598
3599 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3600 if (next_offset == first_nonstatic_oop_offset) {
3601 // There is no gap bettwen superklass's last oop field and first
3602 // local oop field, merge maps.
3603 nonstatic_oop_map_count -= 1;
3604 }
3605 else {
3606 // Superklass didn't end with a oop field, add extra maps
3607 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3608 }
3609 map_count += nonstatic_oop_map_count;
3610 }
3611 }
3612 return map_count;
3613 }
3614
3615 #ifndef PRODUCT
3616 static void print_field_layout(const Symbol* name,
3617 Array<u2>* fields,
3618 constantPoolHandle cp,
3619 int instance_size,
3620 int instance_fields_start,
3621 int instance_fields_end,
3622 int static_fields_end) {
3623
3624 assert(name != NULL, "invariant");
3625
3626 tty->print("%s: field layout\n", name->as_klass_external_name());
3627 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3628 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3629 if (!fs.access_flags().is_static()) {
3630 tty->print(" @%3d \"%s\" %s\n",
3631 fs.offset(),
3632 fs.name()->as_klass_external_name(),
3633 fs.signature()->as_klass_external_name());
3634 }
3635 }
3636 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3637 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3638 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3639 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3640 if (fs.access_flags().is_static()) {
3641 tty->print(" @%3d \"%s\" %s\n",
3642 fs.offset(),
3643 fs.name()->as_klass_external_name(),
3644 fs.signature()->as_klass_external_name());
3645 }
3646 }
3647 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3648 tty->print("\n");
3649 }
3650 #endif
3651
3652 // Values needed for oopmap and InstanceKlass creation
3653 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3654 public:
3655 int* nonstatic_oop_offsets;
3656 unsigned int* nonstatic_oop_counts;
3657 unsigned int nonstatic_oop_map_count;
3658 unsigned int total_oop_map_count;
3659 int instance_size;
3660 int nonstatic_field_size;
3661 int static_field_size;
3662 bool has_nonstatic_fields;
3663 };
3664
3665 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3666 void ClassFileParser::layout_fields(ConstantPool* cp,
3667 const FieldAllocationCount* fac,
3668 const ClassAnnotationCollector* parsed_annotations,
3669 FieldLayoutInfo* info,
3670 TRAPS) {
3671
3672 assert(cp != NULL, "invariant");
3673
3674 // Field size and offset computation
3675 int nonstatic_field_size = _super_klass == NULL ? 0 :
3676 _super_klass->nonstatic_field_size();
3677
3678 // Count the contended fields by type.
3679 //
3680 // We ignore static fields, because @Contended is not supported for them.
3681 // The layout code below will also ignore the static fields.
3682 int nonstatic_contended_count = 0;
3683 FieldAllocationCount fac_contended;
3684 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3685 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3686 if (fs.is_contended()) {
3687 fac_contended.count[atype]++;
3688 if (!fs.access_flags().is_static()) {
3689 nonstatic_contended_count++;
3690 }
3691 }
3692 }
3693
3694
3695 // Calculate the starting byte offsets
3696 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3697 int next_static_double_offset = next_static_oop_offset +
3698 ((fac->count[STATIC_OOP]) * heapOopSize);
3699 if ( fac->count[STATIC_DOUBLE] &&
3700 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3701 Universe::field_type_should_be_aligned(T_LONG)) ) {
3702 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3703 }
3704
3705 int next_static_word_offset = next_static_double_offset +
3706 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3707 int next_static_short_offset = next_static_word_offset +
3708 ((fac->count[STATIC_WORD]) * BytesPerInt);
3709 int next_static_byte_offset = next_static_short_offset +
3710 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3711
3712 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3713 nonstatic_field_size * heapOopSize;
3714
3715 int next_nonstatic_field_offset = nonstatic_fields_start;
3716
3717 const bool is_contended_class = parsed_annotations->is_contended();
3718
3719 // Class is contended, pad before all the fields
3720 if (is_contended_class) {
3721 next_nonstatic_field_offset += ContendedPaddingWidth;
3722 }
3723
3724 // Compute the non-contended fields count.
3725 // The packing code below relies on these counts to determine if some field
3726 // can be squeezed into the alignment gap. Contended fields are obviously
3727 // exempt from that.
3728 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3729 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3730 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3731 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3732 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3733
3734 // Total non-static fields count, including every contended field
3735 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3736 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3737 fac->count[NONSTATIC_OOP];
3738
3739 const bool super_has_nonstatic_fields =
3740 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3741 const bool has_nonstatic_fields =
3742 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3743
3744
3745 // Prepare list of oops for oop map generation.
3746 //
3747 // "offset" and "count" lists are describing the set of contiguous oop
3748 // regions. offset[i] is the start of the i-th region, which then has
3749 // count[i] oops following. Before we know how many regions are required,
3750 // we pessimistically allocate the maps to fit all the oops into the
3751 // distinct regions.
3752 //
3753 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3754 // to figure out if we still need to do this.
3755 unsigned int nonstatic_oop_map_count = 0;
3756 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3757
3758 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3759 THREAD, int, max_nonstatic_oop_maps);
3760 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3761 THREAD, unsigned int, max_nonstatic_oop_maps);
3762
3763 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3764
3765 bool compact_fields = CompactFields;
3766 int allocation_style = FieldsAllocationStyle;
3767 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3768 assert(false, "0 <= FieldsAllocationStyle <= 2");
3769 allocation_style = 1; // Optimistic
3770 }
3771
3772 // The next classes have predefined hard-coded fields offsets
3773 // (see in JavaClasses::compute_hard_coded_offsets()).
3774 // Use default fields allocation order for them.
3775 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3776 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3777 _class_name == vmSymbols::java_lang_Class() ||
3778 _class_name == vmSymbols::java_lang_ClassLoader() ||
3779 _class_name == vmSymbols::java_lang_ref_Reference() ||
3780 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3781 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3782 _class_name == vmSymbols::java_lang_String() ||
3783 _class_name == vmSymbols::java_lang_Throwable() ||
3784 _class_name == vmSymbols::java_lang_Boolean() ||
3785 _class_name == vmSymbols::java_lang_Character() ||
3786 _class_name == vmSymbols::java_lang_Float() ||
3787 _class_name == vmSymbols::java_lang_Double() ||
3788 _class_name == vmSymbols::java_lang_Byte() ||
3789 _class_name == vmSymbols::java_lang_Short() ||
3790 _class_name == vmSymbols::java_lang_Integer() ||
3791 _class_name == vmSymbols::java_lang_Long())) {
3792 allocation_style = 0; // Allocate oops first
3793 compact_fields = false; // Don't compact fields
3794 }
3795
3796 int next_nonstatic_oop_offset = 0;
3797 int next_nonstatic_double_offset = 0;
3798
3799 // Rearrange fields for a given allocation style
3800 if( allocation_style == 0 ) {
3801 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3802 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3803 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3804 (nonstatic_oop_count * heapOopSize);
3805 } else if( allocation_style == 1 ) {
3806 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3807 next_nonstatic_double_offset = next_nonstatic_field_offset;
3808 } else if( allocation_style == 2 ) {
3809 // Fields allocation: oops fields in super and sub classes are together.
3810 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3811 _super_klass->nonstatic_oop_map_size() > 0 ) {
3812 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3813 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3814 const OopMapBlock* const last_map = first_map + map_count - 1;
3815 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3816 if (next_offset == next_nonstatic_field_offset) {
3817 allocation_style = 0; // allocate oops first
3818 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3819 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3820 (nonstatic_oop_count * heapOopSize);
3821 }
3822 }
3823 if( allocation_style == 2 ) {
3824 allocation_style = 1; // allocate oops last
3825 next_nonstatic_double_offset = next_nonstatic_field_offset;
3826 }
3827 } else {
3828 ShouldNotReachHere();
3829 }
3830
3831 int nonstatic_oop_space_count = 0;
3832 int nonstatic_word_space_count = 0;
3833 int nonstatic_short_space_count = 0;
3834 int nonstatic_byte_space_count = 0;
3835 int nonstatic_oop_space_offset = 0;
3836 int nonstatic_word_space_offset = 0;
3837 int nonstatic_short_space_offset = 0;
3838 int nonstatic_byte_space_offset = 0;
3839
3840 // Try to squeeze some of the fields into the gaps due to
3841 // long/double alignment.
3842 if (nonstatic_double_count > 0) {
3843 int offset = next_nonstatic_double_offset;
3844 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3845 if (compact_fields && offset != next_nonstatic_double_offset) {
3846 // Allocate available fields into the gap before double field.
3847 int length = next_nonstatic_double_offset - offset;
3848 assert(length == BytesPerInt, "");
3849 nonstatic_word_space_offset = offset;
3850 if (nonstatic_word_count > 0) {
3851 nonstatic_word_count -= 1;
3852 nonstatic_word_space_count = 1; // Only one will fit
3853 length -= BytesPerInt;
3854 offset += BytesPerInt;
3855 }
3856 nonstatic_short_space_offset = offset;
3857 while (length >= BytesPerShort && nonstatic_short_count > 0) {
3858 nonstatic_short_count -= 1;
3859 nonstatic_short_space_count += 1;
3860 length -= BytesPerShort;
3861 offset += BytesPerShort;
3862 }
3863 nonstatic_byte_space_offset = offset;
3864 while (length > 0 && nonstatic_byte_count > 0) {
3865 nonstatic_byte_count -= 1;
3866 nonstatic_byte_space_count += 1;
3867 length -= 1;
3868 }
3869 // Allocate oop field in the gap if there are no other fields for that.
3870 nonstatic_oop_space_offset = offset;
3871 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3872 allocation_style != 0) { // when oop fields not first
3873 nonstatic_oop_count -= 1;
3874 nonstatic_oop_space_count = 1; // Only one will fit
3875 length -= heapOopSize;
3876 offset += heapOopSize;
3877 }
3878 }
3879 }
3880
3881 int next_nonstatic_word_offset = next_nonstatic_double_offset +
3882 (nonstatic_double_count * BytesPerLong);
3883 int next_nonstatic_short_offset = next_nonstatic_word_offset +
3884 (nonstatic_word_count * BytesPerInt);
3885 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3886 (nonstatic_short_count * BytesPerShort);
3887 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3888 nonstatic_byte_count;
3889
3890 // let oops jump before padding with this allocation style
3891 if( allocation_style == 1 ) {
3892 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3893 if( nonstatic_oop_count > 0 ) {
3894 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3895 }
3896 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3897 }
3898
3899 // Iterate over fields again and compute correct offsets.
3900 // The field allocation type was temporarily stored in the offset slot.
3901 // oop fields are located before non-oop fields (static and non-static).
3902 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3903
3904 // skip already laid out fields
3905 if (fs.is_offset_set()) continue;
3906
3907 // contended instance fields are handled below
3908 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3909
3910 int real_offset = 0;
3911 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3912
3913 // pack the rest of the fields
3914 switch (atype) {
3915 case STATIC_OOP:
3916 real_offset = next_static_oop_offset;
3917 next_static_oop_offset += heapOopSize;
3918 break;
3919 case STATIC_BYTE:
3920 real_offset = next_static_byte_offset;
3921 next_static_byte_offset += 1;
3922 break;
3923 case STATIC_SHORT:
3924 real_offset = next_static_short_offset;
3925 next_static_short_offset += BytesPerShort;
3926 break;
3927 case STATIC_WORD:
3928 real_offset = next_static_word_offset;
3929 next_static_word_offset += BytesPerInt;
3930 break;
3931 case STATIC_DOUBLE:
3932 real_offset = next_static_double_offset;
3933 next_static_double_offset += BytesPerLong;
3934 break;
3935 case NONSTATIC_OOP:
3936 if( nonstatic_oop_space_count > 0 ) {
3937 real_offset = nonstatic_oop_space_offset;
3938 nonstatic_oop_space_offset += heapOopSize;
3939 nonstatic_oop_space_count -= 1;
3940 } else {
3941 real_offset = next_nonstatic_oop_offset;
3942 next_nonstatic_oop_offset += heapOopSize;
3943 }
3944
3945 // Record this oop in the oop maps
3946 if( nonstatic_oop_map_count > 0 &&
3947 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3948 real_offset -
3949 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3950 heapOopSize ) {
3951 // This oop is adjacent to the previous one, add to current oop map
3952 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3953 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3954 } else {
3955 // This oop is not adjacent to the previous one, create new oop map
3956 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3957 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3958 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3959 nonstatic_oop_map_count += 1;
3960 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3961 first_nonstatic_oop_offset = real_offset;
3962 }
3963 }
3964 break;
3965 case NONSTATIC_BYTE:
3966 if( nonstatic_byte_space_count > 0 ) {
3967 real_offset = nonstatic_byte_space_offset;
3968 nonstatic_byte_space_offset += 1;
3969 nonstatic_byte_space_count -= 1;
3970 } else {
3971 real_offset = next_nonstatic_byte_offset;
3972 next_nonstatic_byte_offset += 1;
3973 }
3974 break;
3975 case NONSTATIC_SHORT:
3976 if( nonstatic_short_space_count > 0 ) {
3977 real_offset = nonstatic_short_space_offset;
3978 nonstatic_short_space_offset += BytesPerShort;
3979 nonstatic_short_space_count -= 1;
3980 } else {
3981 real_offset = next_nonstatic_short_offset;
3982 next_nonstatic_short_offset += BytesPerShort;
3983 }
3984 break;
3985 case NONSTATIC_WORD:
3986 if( nonstatic_word_space_count > 0 ) {
3987 real_offset = nonstatic_word_space_offset;
3988 nonstatic_word_space_offset += BytesPerInt;
3989 nonstatic_word_space_count -= 1;
3990 } else {
3991 real_offset = next_nonstatic_word_offset;
3992 next_nonstatic_word_offset += BytesPerInt;
3993 }
3994 break;
3995 case NONSTATIC_DOUBLE:
3996 real_offset = next_nonstatic_double_offset;
3997 next_nonstatic_double_offset += BytesPerLong;
3998 break;
3999 default:
4000 ShouldNotReachHere();
4001 }
4002 fs.set_offset(real_offset);
4003 }
4004
4005
4006 // Handle the contended cases.
4007 //
4008 // Each contended field should not intersect the cache line with another contended field.
4009 // In the absence of alignment information, we end up with pessimistically separating
4010 // the fields with full-width padding.
4011 //
4012 // Additionally, this should not break alignment for the fields, so we round the alignment up
4013 // for each field.
4014 if (nonstatic_contended_count > 0) {
4015
4016 // if there is at least one contended field, we need to have pre-padding for them
4017 next_nonstatic_padded_offset += ContendedPaddingWidth;
4018
4019 // collect all contended groups
4020 ResourceBitMap bm(cp->size());
4021 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4022 // skip already laid out fields
4023 if (fs.is_offset_set()) continue;
4024
4025 if (fs.is_contended()) {
4026 bm.set_bit(fs.contended_group());
4027 }
4028 }
4029
4030 int current_group = -1;
4031 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4032
4033 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4034
4035 // skip already laid out fields
4036 if (fs.is_offset_set()) continue;
4037
4038 // skip non-contended fields and fields from different group
4039 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4040
4041 // handle statics below
4042 if (fs.access_flags().is_static()) continue;
4043
4044 int real_offset = 0;
4045 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4046
4047 switch (atype) {
4048 case NONSTATIC_BYTE:
4049 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
4050 real_offset = next_nonstatic_padded_offset;
4051 next_nonstatic_padded_offset += 1;
4052 break;
4053
4054 case NONSTATIC_SHORT:
4055 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
4056 real_offset = next_nonstatic_padded_offset;
4057 next_nonstatic_padded_offset += BytesPerShort;
4058 break;
4059
4060 case NONSTATIC_WORD:
4061 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4062 real_offset = next_nonstatic_padded_offset;
4063 next_nonstatic_padded_offset += BytesPerInt;
4064 break;
4065
4066 case NONSTATIC_DOUBLE:
4067 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4068 real_offset = next_nonstatic_padded_offset;
4069 next_nonstatic_padded_offset += BytesPerLong;
4070 break;
4071
4072 case NONSTATIC_OOP:
4073 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4074 real_offset = next_nonstatic_padded_offset;
4075 next_nonstatic_padded_offset += heapOopSize;
4076
4077 // Record this oop in the oop maps
4078 if( nonstatic_oop_map_count > 0 &&
4079 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4080 real_offset -
4081 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4082 heapOopSize ) {
4083 // This oop is adjacent to the previous one, add to current oop map
4084 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4085 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4086 } else {
4087 // This oop is not adjacent to the previous one, create new oop map
4088 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4089 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4090 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4091 nonstatic_oop_map_count += 1;
4092 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4093 first_nonstatic_oop_offset = real_offset;
4094 }
4095 }
4096 break;
4097
4098 default:
4099 ShouldNotReachHere();
4100 }
4101
4102 if (fs.contended_group() == 0) {
4103 // Contended group defines the equivalence class over the fields:
4104 // the fields within the same contended group are not inter-padded.
4105 // The only exception is default group, which does not incur the
4106 // equivalence, and so requires intra-padding.
4107 next_nonstatic_padded_offset += ContendedPaddingWidth;
4108 }
4109
4110 fs.set_offset(real_offset);
4111 } // for
4112
4113 // Start laying out the next group.
4114 // Note that this will effectively pad the last group in the back;
4115 // this is expected to alleviate memory contention effects for
4116 // subclass fields and/or adjacent object.
4117 // If this was the default group, the padding is already in place.
4118 if (current_group != 0) {
4119 next_nonstatic_padded_offset += ContendedPaddingWidth;
4120 }
4121 }
4122
4123 // handle static fields
4124 }
4125
4126 // Entire class is contended, pad in the back.
4127 // This helps to alleviate memory contention effects for subclass fields
4128 // and/or adjacent object.
4129 if (is_contended_class) {
4130 next_nonstatic_padded_offset += ContendedPaddingWidth;
4131 }
4132
4133 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4134
4135 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
4136 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4137 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
4138
4139 int static_field_size = (static_fields_end -
4140 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4141 nonstatic_field_size = nonstatic_field_size +
4142 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4143
4144 int instance_size = align_object_size(instance_end / wordSize);
4145
4146 assert(instance_size == align_object_size(align_size_up(
4147 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4148 wordSize) / wordSize), "consistent layout helper value");
4149
4150 // Invariant: nonstatic_field end/start should only change if there are
4151 // nonstatic fields in the class, or if the class is contended. We compare
4152 // against the non-aligned value, so that end alignment will not fail the
4153 // assert without actually having the fields.
4154 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4155 is_contended_class ||
4156 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4157
4158 // Number of non-static oop map blocks allocated at end of klass.
4159 const unsigned int total_oop_map_count =
4160 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4161 first_nonstatic_oop_offset);
4162
4163 #ifndef PRODUCT
4164 if (PrintFieldLayout) {
4165 print_field_layout(_class_name,
4166 _fields,
4167 cp,
4168 instance_size,
4169 nonstatic_fields_start,
4170 nonstatic_fields_end,
4171 static_fields_end);
4172 }
4173
4174 #endif
4175 // Pass back information needed for InstanceKlass creation
4176 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4177 info->nonstatic_oop_counts = nonstatic_oop_counts;
4178 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4179 info->total_oop_map_count = total_oop_map_count;
4180 info->instance_size = instance_size;
4181 info->static_field_size = static_field_size;
4182 info->nonstatic_field_size = nonstatic_field_size;
4183 info->has_nonstatic_fields = has_nonstatic_fields;
4184 }
4185
4186 static void fill_oop_maps(const InstanceKlass* k,
4187 unsigned int nonstatic_oop_map_count,
4188 const int* nonstatic_oop_offsets,
4189 const unsigned int* nonstatic_oop_counts) {
4190
4191 assert(k != NULL, "invariant");
4192
4193 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4194 const InstanceKlass* const super = k->superklass();
4195 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4196 if (super_count > 0) {
4197 // Copy maps from superklass
4198 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4199 for (unsigned int i = 0; i < super_count; ++i) {
4200 *this_oop_map++ = *super_oop_map++;
4201 }
4202 }
4203
4204 if (nonstatic_oop_map_count > 0) {
4205 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4206 // The counts differ because there is no gap between superklass's last oop
4207 // field and the first local oop field. Extend the last oop map copied
4208 // from the superklass instead of creating new one.
4209 nonstatic_oop_map_count--;
4210 nonstatic_oop_offsets++;
4211 this_oop_map--;
4212 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4213 this_oop_map++;
4214 }
4215
4216 // Add new map blocks, fill them
4217 while (nonstatic_oop_map_count-- > 0) {
4218 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4219 this_oop_map->set_count(*nonstatic_oop_counts++);
4220 this_oop_map++;
4221 }
4222 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4223 this_oop_map, "sanity");
4224 }
4225 }
4226
4227
4228 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4229 assert(ik != NULL, "invariant");
4230
4231 const Klass* const super = ik->super();
4232
4233 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4234 // in which case we don't have to register objects as finalizable
4235 if (!_has_empty_finalizer) {
4236 if (_has_finalizer ||
4237 (super != NULL && super->has_finalizer())) {
4238 ik->set_has_finalizer();
4239 }
4240 }
4241
4242 #ifdef ASSERT
4243 bool f = false;
4244 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4245 vmSymbols::void_method_signature());
4246 if (m != NULL && !m->is_empty_method()) {
4247 f = true;
4248 }
4249
4250 // Spec doesn't prevent agent from redefinition of empty finalizer.
4251 // Despite the fact that it's generally bad idea and redefined finalizer
4252 // will not work as expected we shouldn't abort vm in this case
4253 if (!ik->has_redefined_this_or_super()) {
4254 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4255 }
4256 #endif
4257
4258 // Check if this klass supports the java.lang.Cloneable interface
4259 if (SystemDictionary::Cloneable_klass_loaded()) {
4260 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4261 ik->set_is_cloneable();
4262 }
4263 }
4264
4265 // Check if this klass has a vanilla default constructor
4266 if (super == NULL) {
4267 // java.lang.Object has empty default constructor
4268 ik->set_has_vanilla_constructor();
4269 } else {
4270 if (super->has_vanilla_constructor() &&
4271 _has_vanilla_constructor) {
4272 ik->set_has_vanilla_constructor();
4273 }
4274 #ifdef ASSERT
4275 bool v = false;
4276 if (super->has_vanilla_constructor()) {
4277 const Method* const constructor =
4278 ik->find_method(vmSymbols::object_initializer_name(),
4279 vmSymbols::void_method_signature());
4280 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4281 v = true;
4282 }
4283 }
4284 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4285 #endif
4286 }
4287
4288 // If it cannot be fast-path allocated, set a bit in the layout helper.
4289 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4290 assert(ik->size_helper() > 0, "layout_helper is initialized");
4291 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4292 || ik->is_abstract() || ik->is_interface()
4293 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4294 || ik->size_helper() >= FastAllocateSizeLimit) {
4295 // Forbid fast-path allocation.
4296 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4297 ik->set_layout_helper(lh);
4298 }
4299 }
4300
4301 // Attach super classes and interface classes to class loader data
4302 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4303 TRAPS) {
4304 assert(defined_klass != NULL, "invariant");
4305
4306 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4307 if (defining_loader_data->is_the_null_class_loader_data()) {
4308 // Dependencies to null class loader data are implicit.
4309 return;
4310 } else {
4311 // add super class dependency
4312 Klass* const super = defined_klass->super();
4313 if (super != NULL) {
4314 defining_loader_data->record_dependency(super, CHECK);
4315 }
4316
4317 // add super interface dependencies
4318 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4319 if (local_interfaces != NULL) {
4320 const int length = local_interfaces->length();
4321 for (int i = 0; i < length; i++) {
4322 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4323 }
4324 }
4325 }
4326 }
4327
4328 // utility methods for appending an array with check for duplicates
4329
4330 static void append_interfaces(GrowableArray<Klass*>* result,
4331 const Array<Klass*>* const ifs) {
4332 // iterate over new interfaces
4333 for (int i = 0; i < ifs->length(); i++) {
4334 Klass* const e = ifs->at(i);
4335 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4336 // add new interface
4337 result->append_if_missing(e);
4338 }
4339 }
4340
4341 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4342 Array<Klass*>* local_ifs,
4343 ClassLoaderData* loader_data,
4344 TRAPS) {
4345 assert(local_ifs != NULL, "invariant");
4346 assert(loader_data != NULL, "invariant");
4347
4348 // Compute maximum size for transitive interfaces
4349 int max_transitive_size = 0;
4350 int super_size = 0;
4351 // Add superclass transitive interfaces size
4352 if (super != NULL) {
4353 super_size = super->transitive_interfaces()->length();
4354 max_transitive_size += super_size;
4355 }
4356 // Add local interfaces' super interfaces
4357 const int local_size = local_ifs->length();
4358 for (int i = 0; i < local_size; i++) {
4359 Klass* const l = local_ifs->at(i);
4360 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4361 }
4362 // Finally add local interfaces
4363 max_transitive_size += local_size;
4364 // Construct array
4365 if (max_transitive_size == 0) {
4366 // no interfaces, use canonicalized array
4367 return Universe::the_empty_klass_array();
4368 } else if (max_transitive_size == super_size) {
4369 // no new local interfaces added, share superklass' transitive interface array
4370 return super->transitive_interfaces();
4371 } else if (max_transitive_size == local_size) {
4372 // only local interfaces added, share local interface array
4373 return local_ifs;
4374 } else {
4375 ResourceMark rm;
4376 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4377
4378 // Copy down from superclass
4379 if (super != NULL) {
4380 append_interfaces(result, super->transitive_interfaces());
4381 }
4382
4383 // Copy down from local interfaces' superinterfaces
4384 for (int i = 0; i < local_size; i++) {
4385 Klass* const l = local_ifs->at(i);
4386 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4387 }
4388 // Finally add local interfaces
4389 append_interfaces(result, local_ifs);
4390
4391 // length will be less than the max_transitive_size if duplicates were removed
4392 const int length = result->length();
4393 assert(length <= max_transitive_size, "just checking");
4394 Array<Klass*>* const new_result =
4395 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4396 for (int i = 0; i < length; i++) {
4397 Klass* const e = result->at(i);
4398 assert(e != NULL, "just checking");
4399 new_result->at_put(i, e);
4400 }
4401 return new_result;
4402 }
4403 }
4404
4405 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4406 assert(this_klass != NULL, "invariant");
4407 const Klass* const super = this_klass->super();
4408 if (super != NULL) {
4409
4410 // If the loader is not the boot loader then throw an exception if its
4411 // superclass is in package jdk.internal.reflect and its loader is not a
4412 // special reflection class loader
4413 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4414 assert(super->is_instance_klass(), "super is not instance klass");
4415 PackageEntry* super_package = super->package();
4416 if (super_package != NULL &&
4417 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4418 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4419 ResourceMark rm(THREAD);
4420 Exceptions::fthrow(
4421 THREAD_AND_LOCATION,
4422 vmSymbols::java_lang_IllegalAccessError(),
4423 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4424 this_klass->external_name(),
4425 this_klass->class_loader_data()->loader_name(),
4426 super->external_name());
4427 return;
4428 }
4429 }
4430
4431 Reflection::VerifyClassAccessResults vca_result =
4432 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4433 if (vca_result != Reflection::ACCESS_OK) {
4434 ResourceMark rm(THREAD);
4435 char* msg = Reflection::verify_class_access_msg(this_klass,
4436 InstanceKlass::cast(super),
4437 vca_result);
4438 if (msg == NULL) {
4439 Exceptions::fthrow(
4440 THREAD_AND_LOCATION,
4441 vmSymbols::java_lang_IllegalAccessError(),
4442 "class %s cannot access its superclass %s",
4443 this_klass->external_name(),
4444 super->external_name());
4445 } else {
4446 // Add additional message content.
4447 Exceptions::fthrow(
4448 THREAD_AND_LOCATION,
4449 vmSymbols::java_lang_IllegalAccessError(),
4450 "superclass access check failed: %s",
4451 msg);
4452 }
4453 }
4454 }
4455 }
4456
4457
4458 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4459 assert(this_klass != NULL, "invariant");
4460 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4461 const int lng = local_interfaces->length();
4462 for (int i = lng - 1; i >= 0; i--) {
4463 Klass* const k = local_interfaces->at(i);
4464 assert (k != NULL && k->is_interface(), "invalid interface");
4465 Reflection::VerifyClassAccessResults vca_result =
4466 Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false);
4467 if (vca_result != Reflection::ACCESS_OK) {
4468 ResourceMark rm(THREAD);
4469 char* msg = Reflection::verify_class_access_msg(this_klass,
4470 InstanceKlass::cast(k),
4471 vca_result);
4472 if (msg == NULL) {
4473 Exceptions::fthrow(
4474 THREAD_AND_LOCATION,
4475 vmSymbols::java_lang_IllegalAccessError(),
4476 "class %s cannot access its superinterface %s",
4477 this_klass->external_name(),
4478 k->external_name());
4479 } else {
4480 // Add additional message content.
4481 Exceptions::fthrow(
4482 THREAD_AND_LOCATION,
4483 vmSymbols::java_lang_IllegalAccessError(),
4484 "superinterface check failed: %s",
4485 msg);
4486 }
4487 }
4488 }
4489 }
4490
4491
4492 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4493 assert(this_klass != NULL, "invariant");
4494 const Array<Method*>* const methods = this_klass->methods();
4495 const int num_methods = methods->length();
4496
4497 // go thru each method and check if it overrides a final method
4498 for (int index = 0; index < num_methods; index++) {
4499 const Method* const m = methods->at(index);
4500
4501 // skip private, static, and <init> methods
4502 if ((!m->is_private() && !m->is_static()) &&
4503 (m->name() != vmSymbols::object_initializer_name())) {
4504
4505 const Symbol* const name = m->name();
4506 const Symbol* const signature = m->signature();
4507 const Klass* k = this_klass->super();
4508 const Method* super_m = NULL;
4509 while (k != NULL) {
4510 // skip supers that don't have final methods.
4511 if (k->has_final_method()) {
4512 // lookup a matching method in the super class hierarchy
4513 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4514 if (super_m == NULL) {
4515 break; // didn't find any match; get out
4516 }
4517
4518 if (super_m->is_final() && !super_m->is_static() &&
4519 // matching method in super is final, and not static
4520 (Reflection::verify_field_access(this_klass,
4521 super_m->method_holder(),
4522 super_m->method_holder(),
4523 super_m->access_flags(), false))
4524 // this class can access super final method and therefore override
4525 ) {
4526 ResourceMark rm(THREAD);
4527 Exceptions::fthrow(
4528 THREAD_AND_LOCATION,
4529 vmSymbols::java_lang_VerifyError(),
4530 "class %s overrides final method %s.%s%s",
4531 this_klass->external_name(),
4532 super_m->method_holder()->external_name(),
4533 name->as_C_string(),
4534 signature->as_C_string()
4535 );
4536 return;
4537 }
4538
4539 // continue to look from super_m's holder's super.
4540 k = super_m->method_holder()->super();
4541 continue;
4542 }
4543
4544 k = k->super();
4545 }
4546 }
4547 }
4548 }
4549
4550
4551 // assumes that this_klass is an interface
4552 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4553 assert(this_klass != NULL, "invariant");
4554 assert(this_klass->is_interface(), "not an interface");
4555 const Array<Method*>* methods = this_klass->methods();
4556 const int num_methods = methods->length();
4557
4558 for (int index = 0; index < num_methods; index++) {
4559 const Method* const m = methods->at(index);
4560 // if m is static and not the init method, throw a verify error
4561 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4562 ResourceMark rm(THREAD);
4563 Exceptions::fthrow(
4564 THREAD_AND_LOCATION,
4565 vmSymbols::java_lang_VerifyError(),
4566 "Illegal static method %s in interface %s",
4567 m->name()->as_C_string(),
4568 this_klass->external_name()
4569 );
4570 return;
4571 }
4572 }
4573 }
4574
4575 // utility methods for format checking
4576
4577 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4578 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4579 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4580 if (is_module) {
4581 ResourceMark rm(THREAD);
4582 Exceptions::fthrow(
4583 THREAD_AND_LOCATION,
4584 vmSymbols::java_lang_NoClassDefFoundError(),
4585 "%s is not a class because access_flag ACC_MODULE is set",
4586 _class_name->as_C_string());
4587 return;
4588 }
4589
4590 if (!_need_verify) { return; }
4591
4592 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4593 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4594 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4595 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4596 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4597 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4598 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4599
4600 if ((is_abstract && is_final) ||
4601 (is_interface && !is_abstract) ||
4602 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4603 (!is_interface && major_gte_15 && is_annotation)) {
4604 ResourceMark rm(THREAD);
4605 Exceptions::fthrow(
4606 THREAD_AND_LOCATION,
4607 vmSymbols::java_lang_ClassFormatError(),
4608 "Illegal class modifiers in class %s: 0x%X",
4609 _class_name->as_C_string(), flags
4610 );
4611 return;
4612 }
4613 }
4614
4615 static bool has_illegal_visibility(jint flags) {
4616 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4617 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4618 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4619
4620 return ((is_public && is_protected) ||
4621 (is_public && is_private) ||
4622 (is_protected && is_private));
4623 }
4624
4625 static bool is_supported_version(u2 major, u2 minor){
4626 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4627 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4628 (major <= max_version) &&
4629 ((major != max_version) ||
4630 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4631 }
4632
4633 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4634 bool is_interface,
4635 TRAPS) const {
4636 if (!_need_verify) { return; }
4637
4638 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4639 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4640 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4641 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4642 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4643 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4644 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4645 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4646 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4647
4648 bool is_illegal = false;
4649
4650 if (is_interface) {
4651 if (!is_public || !is_static || !is_final || is_private ||
4652 is_protected || is_volatile || is_transient ||
4653 (major_gte_15 && is_enum)) {
4654 is_illegal = true;
4655 }
4656 } else { // not interface
4657 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4658 is_illegal = true;
4659 }
4660 }
4661
4662 if (is_illegal) {
4663 ResourceMark rm(THREAD);
4664 Exceptions::fthrow(
4665 THREAD_AND_LOCATION,
4666 vmSymbols::java_lang_ClassFormatError(),
4667 "Illegal field modifiers in class %s: 0x%X",
4668 _class_name->as_C_string(), flags);
4669 return;
4670 }
4671 }
4672
4673 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4674 bool is_interface,
4675 const Symbol* name,
4676 TRAPS) const {
4677 if (!_need_verify) { return; }
4678
4679 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4680 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4681 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4682 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4683 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4684 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4685 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4686 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4687 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4688 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4689 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4690 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4691 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4692
4693 bool is_illegal = false;
4694
4695 if (is_interface) {
4696 if (major_gte_8) {
4697 // Class file version is JAVA_8_VERSION or later Methods of
4698 // interfaces may set any of the flags except ACC_PROTECTED,
4699 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4700 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4701 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4702 (is_native || is_protected || is_final || is_synchronized) ||
4703 // If a specific method of a class or interface has its
4704 // ACC_ABSTRACT flag set, it must not have any of its
4705 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4706 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4707 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4708 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4709 (is_abstract && (is_private || is_static || is_strict))) {
4710 is_illegal = true;
4711 }
4712 } else if (major_gte_15) {
4713 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4714 if (!is_public || is_private || is_protected || is_static || is_final ||
4715 is_synchronized || is_native || !is_abstract || is_strict) {
4716 is_illegal = true;
4717 }
4718 } else {
4719 // Class file version is pre-JAVA_1_5_VERSION
4720 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4721 is_illegal = true;
4722 }
4723 }
4724 } else { // not interface
4725 if (has_illegal_visibility(flags)) {
4726 is_illegal = true;
4727 } else {
4728 if (is_initializer) {
4729 if (is_static || is_final || is_synchronized || is_native ||
4730 is_abstract || (major_gte_15 && is_bridge)) {
4731 is_illegal = true;
4732 }
4733 } else { // not initializer
4734 if (is_abstract) {
4735 if ((is_final || is_native || is_private || is_static ||
4736 (major_gte_15 && (is_synchronized || is_strict)))) {
4737 is_illegal = true;
4738 }
4739 }
4740 }
4741 }
4742 }
4743
4744 if (is_illegal) {
4745 ResourceMark rm(THREAD);
4746 Exceptions::fthrow(
4747 THREAD_AND_LOCATION,
4748 vmSymbols::java_lang_ClassFormatError(),
4749 "Method %s in class %s has illegal modifiers: 0x%X",
4750 name->as_C_string(), _class_name->as_C_string(), flags);
4751 return;
4752 }
4753 }
4754
4755 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4756 int length,
4757 TRAPS) const {
4758 assert(_need_verify, "only called when _need_verify is true");
4759 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4760 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4761 }
4762 }
4763
4764 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4765 // In class names, '/' separates unqualified names. This is verified in this function also.
4766 // Method names also may not contain the characters '<' or '>', unless <init>
4767 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4768 // method. Because these names have been checked as special cases before
4769 // calling this method in verify_legal_method_name.
4770 //
4771 // This method is also called from the modular system APIs in modules.cpp
4772 // to verify the validity of module and package names.
4773 bool ClassFileParser::verify_unqualified_name(const char* name,
4774 unsigned int length,
4775 int type) {
4776 for (const char* p = name; p != name + length;) {
4777 jchar ch = *p;
4778 if (ch < 128) {
4779 if (ch == '.' || ch == ';' || ch == '[' ) {
4780 return false; // do not permit '.', ';', or '['
4781 }
4782 if (ch == '/') {
4783 // check for '//' or leading or trailing '/' which are not legal
4784 // unqualified name must not be empty
4785 if (type == ClassFileParser::LegalClass) {
4786 if (p == name || p+1 >= name+length || *(p+1) == '/') {
4787 return false;
4788 }
4789 } else {
4790 return false; // do not permit '/' unless it's class name
4791 }
4792 }
4793 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
4794 return false; // do not permit '<' or '>' in method names
4795 }
4796 p++;
4797 } else {
4798 char* tmp_p = UTF8::next(p, &ch);
4799 p = tmp_p;
4800 }
4801 }
4802 return true;
4803 }
4804
4805 // Take pointer to a string. Skip over the longest part of the string that could
4806 // be taken as a fieldname. Allow '/' if slash_ok is true.
4807 // Return a pointer to just past the fieldname.
4808 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4809 // being true, we saw consecutive slashes (meaning we were looking for a
4810 // qualified path but found something that was badly-formed).
4811 static const char* skip_over_field_name(const char* name,
4812 bool slash_ok,
4813 unsigned int length) {
4814 const char* p;
4815 jboolean last_is_slash = false;
4816 jboolean not_first_ch = false;
4817
4818 for (p = name; p != name + length; not_first_ch = true) {
4819 const char* old_p = p;
4820 jchar ch = *p;
4821 if (ch < 128) {
4822 p++;
4823 // quick check for ascii
4824 if ((ch >= 'a' && ch <= 'z') ||
4825 (ch >= 'A' && ch <= 'Z') ||
4826 (ch == '_' || ch == '$') ||
4827 (not_first_ch && ch >= '0' && ch <= '9')) {
4828 last_is_slash = false;
4829 continue;
4830 }
4831 if (slash_ok && ch == '/') {
4832 if (last_is_slash) {
4833 return NULL; // Don't permit consecutive slashes
4834 }
4835 last_is_slash = true;
4836 continue;
4837 }
4838 }
4839 else {
4840 jint unicode_ch;
4841 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4842 p = tmp_p;
4843 last_is_slash = false;
4844 // Check if ch is Java identifier start or is Java identifier part
4845 // 4672820: call java.lang.Character methods directly without generating separate tables.
4846 EXCEPTION_MARK;
4847
4848 // return value
4849 JavaValue result(T_BOOLEAN);
4850 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4851 JavaCallArguments args;
4852 args.push_int(unicode_ch);
4853
4854 // public static boolean isJavaIdentifierStart(char ch);
4855 JavaCalls::call_static(&result,
4856 SystemDictionary::Character_klass(),
4857 vmSymbols::isJavaIdentifierStart_name(),
4858 vmSymbols::int_bool_signature(),
4859 &args,
4860 THREAD);
4861
4862 if (HAS_PENDING_EXCEPTION) {
4863 CLEAR_PENDING_EXCEPTION;
4864 return 0;
4865 }
4866 if (result.get_jboolean()) {
4867 continue;
4868 }
4869
4870 if (not_first_ch) {
4871 // public static boolean isJavaIdentifierPart(char ch);
4872 JavaCalls::call_static(&result,
4873 SystemDictionary::Character_klass(),
4874 vmSymbols::isJavaIdentifierPart_name(),
4875 vmSymbols::int_bool_signature(),
4876 &args,
4877 THREAD);
4878
4879 if (HAS_PENDING_EXCEPTION) {
4880 CLEAR_PENDING_EXCEPTION;
4881 return 0;
4882 }
4883
4884 if (result.get_jboolean()) {
4885 continue;
4886 }
4887 }
4888 }
4889 return (not_first_ch) ? old_p : NULL;
4890 }
4891 return (not_first_ch) ? p : NULL;
4892 }
4893
4894 // Take pointer to a string. Skip over the longest part of the string that could
4895 // be taken as a field signature. Allow "void" if void_ok.
4896 // Return a pointer to just past the signature.
4897 // Return NULL if no legal signature is found.
4898 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4899 bool void_ok,
4900 unsigned int length,
4901 TRAPS) const {
4902 unsigned int array_dim = 0;
4903 while (length > 0) {
4904 switch (signature[0]) {
4905 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4906 case JVM_SIGNATURE_BOOLEAN:
4907 case JVM_SIGNATURE_BYTE:
4908 case JVM_SIGNATURE_CHAR:
4909 case JVM_SIGNATURE_SHORT:
4910 case JVM_SIGNATURE_INT:
4911 case JVM_SIGNATURE_FLOAT:
4912 case JVM_SIGNATURE_LONG:
4913 case JVM_SIGNATURE_DOUBLE:
4914 return signature + 1;
4915 case JVM_SIGNATURE_CLASS: {
4916 if (_major_version < JAVA_1_5_VERSION) {
4917 // Skip over the class name if one is there
4918 const char* const p = skip_over_field_name(signature + 1, true, --length);
4919
4920 // The next character better be a semicolon
4921 if (p && (p - signature) > 1 && p[0] == ';') {
4922 return p + 1;
4923 }
4924 }
4925 else {
4926 // Skip leading 'L' and ignore first appearance of ';'
4927 length--;
4928 signature++;
4929 char* c = strchr((char*) signature, ';');
4930 // Format check signature
4931 if (c != NULL) {
4932 ResourceMark rm(THREAD);
4933 int newlen = c - (char*) signature;
4934 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
4935 strncpy(sig, signature, newlen);
4936 sig[newlen] = '\0';
4937
4938 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
4939 if (!legal) {
4940 classfile_parse_error("Class name contains illegal character "
4941 "in descriptor in class file %s",
4942 CHECK_0);
4943 return NULL;
4944 }
4945 return signature + newlen + 1;
4946 }
4947 }
4948 return NULL;
4949 }
4950 case JVM_SIGNATURE_ARRAY:
4951 array_dim++;
4952 if (array_dim > 255) {
4953 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4954 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4955 }
4956 // The rest of what's there better be a legal signature
4957 signature++;
4958 length--;
4959 void_ok = false;
4960 break;
4961 default:
4962 return NULL;
4963 }
4964 }
4965 return NULL;
4966 }
4967
4968 // Checks if name is a legal class name.
4969 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4970 if (!_need_verify || _relax_verify) { return; }
4971
4972 char buf[fixed_buffer_size];
4973 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4974 unsigned int length = name->utf8_length();
4975 bool legal = false;
4976
4977 if (length > 0) {
4978 const char* p;
4979 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4980 p = skip_over_field_signature(bytes, false, length, CHECK);
4981 legal = (p != NULL) && ((p - bytes) == (int)length);
4982 } else if (_major_version < JAVA_1_5_VERSION) {
4983 if (bytes[0] != '<') {
4984 p = skip_over_field_name(bytes, true, length);
4985 legal = (p != NULL) && ((p - bytes) == (int)length);
4986 }
4987 } else {
4988 // 4900761: relax the constraints based on JSR202 spec
4989 // Class names may be drawn from the entire Unicode character set.
4990 // Identifiers between '/' must be unqualified names.
4991 // The utf8 string has been verified when parsing cpool entries.
4992 legal = verify_unqualified_name(bytes, length, LegalClass);
4993 }
4994 }
4995 if (!legal) {
4996 ResourceMark rm(THREAD);
4997 assert(_class_name != NULL, "invariant");
4998 Exceptions::fthrow(
4999 THREAD_AND_LOCATION,
5000 vmSymbols::java_lang_ClassFormatError(),
5001 "Illegal class name \"%s\" in class file %s", bytes,
5002 _class_name->as_C_string()
5003 );
5004 return;
5005 }
5006 }
5007
5008 // Checks if name is a legal field name.
5009 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5010 if (!_need_verify || _relax_verify) { return; }
5011
5012 char buf[fixed_buffer_size];
5013 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5014 unsigned int length = name->utf8_length();
5015 bool legal = false;
5016
5017 if (length > 0) {
5018 if (_major_version < JAVA_1_5_VERSION) {
5019 if (bytes[0] != '<') {
5020 const char* p = skip_over_field_name(bytes, false, length);
5021 legal = (p != NULL) && ((p - bytes) == (int)length);
5022 }
5023 } else {
5024 // 4881221: relax the constraints based on JSR202 spec
5025 legal = verify_unqualified_name(bytes, length, LegalField);
5026 }
5027 }
5028
5029 if (!legal) {
5030 ResourceMark rm(THREAD);
5031 assert(_class_name != NULL, "invariant");
5032 Exceptions::fthrow(
5033 THREAD_AND_LOCATION,
5034 vmSymbols::java_lang_ClassFormatError(),
5035 "Illegal field name \"%s\" in class %s", bytes,
5036 _class_name->as_C_string()
5037 );
5038 return;
5039 }
5040 }
5041
5042 // Checks if name is a legal method name.
5043 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5044 if (!_need_verify || _relax_verify) { return; }
5045
5046 assert(name != NULL, "method name is null");
5047 char buf[fixed_buffer_size];
5048 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5049 unsigned int length = name->utf8_length();
5050 bool legal = false;
5051
5052 if (length > 0) {
5053 if (bytes[0] == '<') {
5054 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5055 legal = true;
5056 }
5057 } else if (_major_version < JAVA_1_5_VERSION) {
5058 const char* p;
5059 p = skip_over_field_name(bytes, false, length);
5060 legal = (p != NULL) && ((p - bytes) == (int)length);
5061 } else {
5062 // 4881221: relax the constraints based on JSR202 spec
5063 legal = verify_unqualified_name(bytes, length, LegalMethod);
5064 }
5065 }
5066
5067 if (!legal) {
5068 ResourceMark rm(THREAD);
5069 assert(_class_name != NULL, "invariant");
5070 Exceptions::fthrow(
5071 THREAD_AND_LOCATION,
5072 vmSymbols::java_lang_ClassFormatError(),
5073 "Illegal method name \"%s\" in class %s", bytes,
5074 _class_name->as_C_string()
5075 );
5076 return;
5077 }
5078 }
5079
5080
5081 // Checks if signature is a legal field signature.
5082 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5083 const Symbol* signature,
5084 TRAPS) const {
5085 if (!_need_verify) { return; }
5086
5087 char buf[fixed_buffer_size];
5088 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5089 const unsigned int length = signature->utf8_length();
5090 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5091
5092 if (p == NULL || (p - bytes) != (int)length) {
5093 throwIllegalSignature("Field", name, signature, CHECK);
5094 }
5095 }
5096
5097 // Checks if signature is a legal method signature.
5098 // Returns number of parameters
5099 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5100 const Symbol* signature,
5101 TRAPS) const {
5102 if (!_need_verify) {
5103 // make sure caller's args_size will be less than 0 even for non-static
5104 // method so it will be recomputed in compute_size_of_parameters().
5105 return -2;
5106 }
5107
5108 // Class initializers cannot have args for class format version >= 51.
5109 if (name == vmSymbols::class_initializer_name() &&
5110 signature != vmSymbols::void_method_signature() &&
5111 _major_version >= JAVA_7_VERSION) {
5112 throwIllegalSignature("Method", name, signature, CHECK_0);
5113 return 0;
5114 }
5115
5116 unsigned int args_size = 0;
5117 char buf[fixed_buffer_size];
5118 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5119 unsigned int length = signature->utf8_length();
5120 const char* nextp;
5121
5122 // The first character must be a '('
5123 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5124 length--;
5125 // Skip over legal field signatures
5126 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5127 while ((length > 0) && (nextp != NULL)) {
5128 args_size++;
5129 if (p[0] == 'J' || p[0] == 'D') {
5130 args_size++;
5131 }
5132 length -= nextp - p;
5133 p = nextp;
5134 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5135 }
5136 // The first non-signature thing better be a ')'
5137 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5138 length--;
5139 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5140 // All internal methods must return void
5141 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5142 return args_size;
5143 }
5144 } else {
5145 // Now we better just have a return value
5146 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5147 if (nextp && ((int)length == (nextp - p))) {
5148 return args_size;
5149 }
5150 }
5151 }
5152 }
5153 // Report error
5154 throwIllegalSignature("Method", name, signature, CHECK_0);
5155 return 0;
5156 }
5157
5158 int ClassFileParser::static_field_size() const {
5159 assert(_field_info != NULL, "invariant");
5160 return _field_info->static_field_size;
5161 }
5162
5163 int ClassFileParser::total_oop_map_count() const {
5164 assert(_field_info != NULL, "invariant");
5165 return _field_info->total_oop_map_count;
5166 }
5167
5168 jint ClassFileParser::layout_size() const {
5169 assert(_field_info != NULL, "invariant");
5170 return _field_info->instance_size;
5171 }
5172
5173 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5174 const Array<Method*>* methods) {
5175 assert(ik != NULL, "invariant");
5176 assert(methods != NULL, "invariant");
5177
5178 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5179 // (We used to do this lazily, but now we query it in Rewriter,
5180 // which is eagerly done for every method, so we might as well do it now,
5181 // when everything is fresh in memory.)
5182 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5183
5184 if (klass_id != vmSymbols::NO_SID) {
5185 for (int j = 0; j < methods->length(); ++j) {
5186 Method* method = methods->at(j);
5187 method->init_intrinsic_id();
5188
5189 if (CheckIntrinsics) {
5190 // Check if an intrinsic is defined for method 'method',
5191 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5192 if (method->intrinsic_id() != vmIntrinsics::_none &&
5193 !method->intrinsic_candidate()) {
5194 tty->print("Compiler intrinsic is defined for method [%s], "
5195 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5196 method->name_and_sig_as_C_string(),
5197 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5198 );
5199 tty->cr();
5200 DEBUG_ONLY(vm_exit(1));
5201 }
5202 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5203 // but there is no intrinsic available for it.
5204 if (method->intrinsic_candidate() &&
5205 method->intrinsic_id() == vmIntrinsics::_none) {
5206 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5207 "but no compiler intrinsic is defined for the method.%s",
5208 method->name_and_sig_as_C_string(),
5209 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5210 );
5211 tty->cr();
5212 DEBUG_ONLY(vm_exit(1));
5213 }
5214 }
5215 } // end for
5216
5217 #ifdef ASSERT
5218 if (CheckIntrinsics) {
5219 // Check for orphan methods in the current class. A method m
5220 // of a class C is orphan if an intrinsic is defined for method m,
5221 // but class C does not declare m.
5222 // The check is potentially expensive, therefore it is available
5223 // only in debug builds.
5224
5225 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5226 if (vmIntrinsics::_compiledLambdaForm == id) {
5227 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5228 // generated for the JVM from a LambdaForm and therefore no method
5229 // is defined for it.
5230 continue;
5231 }
5232
5233 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5234 // Check if the current class contains a method with the same
5235 // name, flags, signature.
5236 bool match = false;
5237 for (int j = 0; j < methods->length(); ++j) {
5238 const Method* method = methods->at(j);
5239 if (method->intrinsic_id() == id) {
5240 match = true;
5241 break;
5242 }
5243 }
5244
5245 if (!match) {
5246 char buf[1000];
5247 tty->print("Compiler intrinsic is defined for method [%s], "
5248 "but the method is not available in class [%s].%s",
5249 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5250 buf, sizeof(buf)),
5251 ik->name()->as_C_string(),
5252 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5253 );
5254 tty->cr();
5255 DEBUG_ONLY(vm_exit(1));
5256 }
5257 }
5258 } // end for
5259 } // CheckIntrinsics
5260 #endif // ASSERT
5261 }
5262 }
5263
5264 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5265 if (_klass != NULL) {
5266 return _klass;
5267 }
5268
5269 InstanceKlass* const ik =
5270 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5271
5272 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5273
5274 assert(_klass == ik, "invariant");
5275
5276 ik->set_has_passed_fingerprint_check(false);
5277 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5278 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5279 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5280 // This class matches with a class saved in an AOT library
5281 ik->set_has_passed_fingerprint_check(true);
5282 } else {
5283 ResourceMark rm;
5284 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5285 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5286 }
5287 }
5288
5289 return ik;
5290 }
5291
5292 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5293 assert(ik != NULL, "invariant");
5294
5295 set_klass_to_deallocate(ik);
5296
5297 assert(_field_info != NULL, "invariant");
5298 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5299 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5300 "sanity");
5301
5302 assert(ik->is_instance_klass(), "sanity");
5303 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5304
5305 // Fill in information already parsed
5306 ik->set_should_verify_class(_need_verify);
5307
5308 // Not yet: supers are done below to support the new subtype-checking fields
5309 ik->set_class_loader_data(_loader_data);
5310 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5311 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5312 assert(_fac != NULL, "invariant");
5313 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5314
5315 // this transfers ownership of a lot of arrays from
5316 // the parser onto the InstanceKlass*
5317 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5318
5319 // note that is not safe to use the fields in the parser from this point on
5320 assert(NULL == _cp, "invariant");
5321 assert(NULL == _fields, "invariant");
5322 assert(NULL == _methods, "invariant");
5323 assert(NULL == _inner_classes, "invariant");
5324 assert(NULL == _local_interfaces, "invariant");
5325 assert(NULL == _transitive_interfaces, "invariant");
5326 assert(NULL == _combined_annotations, "invariant");
5327
5328 if (_has_final_method) {
5329 ik->set_has_final_method();
5330 }
5331
5332 ik->copy_method_ordering(_method_ordering, CHECK);
5333 // The InstanceKlass::_methods_jmethod_ids cache
5334 // is managed on the assumption that the initial cache
5335 // size is equal to the number of methods in the class. If
5336 // that changes, then InstanceKlass::idnum_can_increment()
5337 // has to be changed accordingly.
5338 ik->set_initial_method_idnum(ik->methods()->length());
5339
5340 ik->set_name(_class_name);
5341
5342 if (is_anonymous()) {
5343 // I am well known to myself
5344 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve
5345 }
5346
5347 ik->set_minor_version(_minor_version);
5348 ik->set_major_version(_major_version);
5349 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5350 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5351
5352 if (_host_klass != NULL) {
5353 assert (ik->is_anonymous(), "should be the same");
5354 ik->set_host_klass(_host_klass);
5355 }
5356
5357 // Set PackageEntry for this_klass
5358 oop cl = ik->class_loader();
5359 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5360 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5361 ik->set_package(cld, CHECK);
5362
5363 const Array<Method*>* const methods = ik->methods();
5364 assert(methods != NULL, "invariant");
5365 const int methods_len = methods->length();
5366
5367 check_methods_for_intrinsics(ik, methods);
5368
5369 // Fill in field values obtained by parse_classfile_attributes
5370 if (_parsed_annotations->has_any_annotations()) {
5371 _parsed_annotations->apply_to(ik);
5372 }
5373
5374 apply_parsed_class_attributes(ik);
5375
5376 // Miranda methods
5377 if ((_num_miranda_methods > 0) ||
5378 // if this class introduced new miranda methods or
5379 (_super_klass != NULL && _super_klass->has_miranda_methods())
5380 // super class exists and this class inherited miranda methods
5381 ) {
5382 ik->set_has_miranda_methods(); // then set a flag
5383 }
5384
5385 // Fill in information needed to compute superclasses.
5386 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5387
5388 // Initialize itable offset tables
5389 klassItable::setup_itable_offset_table(ik);
5390
5391 // Compute transitive closure of interfaces this class implements
5392 // Do final class setup
5393 fill_oop_maps(ik,
5394 _field_info->nonstatic_oop_map_count,
5395 _field_info->nonstatic_oop_offsets,
5396 _field_info->nonstatic_oop_counts);
5397
5398 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5399 set_precomputed_flags(ik);
5400
5401 // check if this class can access its super class
5402 check_super_class_access(ik, CHECK);
5403
5404 // check if this class can access its superinterfaces
5405 check_super_interface_access(ik, CHECK);
5406
5407 // check if this class overrides any final method
5408 check_final_method_override(ik, CHECK);
5409
5410 // reject static interface methods prior to Java 8
5411 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5412 check_illegal_static_method(ik, CHECK);
5413 }
5414
5415 // Obtain this_klass' module entry
5416 ModuleEntry* module_entry = ik->module();
5417 assert(module_entry != NULL, "module_entry should always be set");
5418
5419 // Obtain java.lang.reflect.Module
5420 Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module()));
5421
5422 // Allocate mirror and initialize static fields
5423 // The create_mirror() call will also call compute_modifiers()
5424 java_lang_Class::create_mirror(ik,
5425 Handle(THREAD, _loader_data->class_loader()),
5426 module_handle,
5427 _protection_domain,
5428 CHECK);
5429
5430 assert(_all_mirandas != NULL, "invariant");
5431
5432 // Generate any default methods - default methods are public interface methods
5433 // that have a default implementation. This is new with Java 8.
5434 if (_has_nonstatic_concrete_methods) {
5435 DefaultMethods::generate_default_methods(ik,
5436 _all_mirandas,
5437 CHECK);
5438 }
5439
5440 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5441 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5442 !module_entry->has_default_read_edges()) {
5443 if (!module_entry->set_has_default_read_edges()) {
5444 // We won a potential race
5445 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5446 }
5447 }
5448
5449 // Update the loader_data graph.
5450 record_defined_class_dependencies(ik, CHECK);
5451
5452 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5453
5454 if (!is_internal()) {
5455 if (log_is_enabled(Info, class, load)) {
5456 ResourceMark rm;
5457 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5458
5459 if (log_is_enabled(Info, class, load)) {
5460 ik->print_loading_log(LogLevel::Info, _loader_data, module_name, _stream);
5461 }
5462 // No 'else' here as logging levels are not mutually exclusive
5463 if (log_is_enabled(Debug, class, load)) {
5464 ik->print_loading_log(LogLevel::Debug, _loader_data, module_name, _stream);
5465 }
5466 }
5467
5468 if (log_is_enabled(Debug, class, resolve)) {
5469 ResourceMark rm;
5470 // print out the superclass.
5471 const char * from = ik->external_name();
5472 if (ik->java_super() != NULL) {
5473 log_debug(class, resolve)("%s %s (super)",
5474 from,
5475 ik->java_super()->external_name());
5476 }
5477 // print out each of the interface classes referred to by this class.
5478 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5479 if (local_interfaces != NULL) {
5480 const int length = local_interfaces->length();
5481 for (int i = 0; i < length; i++) {
5482 const Klass* const k = local_interfaces->at(i);
5483 const char * to = k->external_name();
5484 log_debug(class, resolve)("%s %s (interface)", from, to);
5485 }
5486 }
5487 }
5488 }
5489
5490 TRACE_INIT_ID(ik);
5491
5492 // If we reach here, all is well.
5493 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5494 // in order for it to not be destroyed in the ClassFileParser destructor.
5495 set_klass_to_deallocate(NULL);
5496
5497 // it's official
5498 set_klass(ik);
5499
5500 debug_only(ik->verify();)
5501 }
5502
5503 // For an anonymous class that is in the unnamed package, move it to its host class's
5504 // package by prepending its host class's package name to its class name and setting
5505 // its _class_name field.
5506 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5507 ResourceMark rm(THREAD);
5508 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5509 "Anonymous class should not be in a package");
5510 const char* host_pkg_name =
5511 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5512
5513 if (host_pkg_name != NULL) {
5514 size_t host_pkg_len = strlen(host_pkg_name);
5515 int class_name_len = _class_name->utf8_length();
5516 char* new_anon_name =
5517 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5518 // Copy host package name and trailing /.
5519 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5520 new_anon_name[host_pkg_len] = '/';
5521 // Append anonymous class name. The anonymous class name can contain odd
5522 // characters. So, do a strncpy instead of using sprintf("%s...").
5523 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5524
5525 // Create a symbol and update the anonymous class name.
5526 _class_name = SymbolTable::new_symbol(new_anon_name,
5527 (int)host_pkg_len + 1 + class_name_len,
5528 CHECK);
5529 }
5530 }
5531
5532 // If the host class and the anonymous class are in the same package then do
5533 // nothing. If the anonymous class is in the unnamed package then move it to its
5534 // host's package. If the classes are in different packages then throw an IAE
5535 // exception.
5536 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5537 assert(_host_klass != NULL, "Expected an anonymous class");
5538
5539 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5540 _class_name->utf8_length(), '/');
5541 if (anon_last_slash == NULL) { // Unnamed package
5542 prepend_host_package_name(_host_klass, CHECK);
5543 } else {
5544 if (!InstanceKlass::is_same_class_package(_host_klass->class_loader(),
5545 _host_klass->name(),
5546 _host_klass->class_loader(),
5547 _class_name)) {
5548 ResourceMark rm(THREAD);
5549 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5550 err_msg("Host class %s and anonymous class %s are in different packages",
5551 _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5552 }
5553 }
5554 }
5555
5556 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5557 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5558 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5559 bool need_verify =
5560 // verifyAll
5561 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5562 // verifyRemote
5563 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5564 return !need_verify;
5565 }
5566
5567 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5568 Symbol* name,
5569 ClassLoaderData* loader_data,
5570 Handle protection_domain,
5571 const InstanceKlass* host_klass,
5572 GrowableArray<Handle>* cp_patches,
5573 Publicity pub_level,
5574 TRAPS) :
5575 _stream(stream),
5576 _requested_name(name),
5577 _loader_data(loader_data),
5578 _host_klass(host_klass),
5579 _cp_patches(cp_patches),
5580 _super_klass(),
5581 _cp(NULL),
5582 _fields(NULL),
5583 _methods(NULL),
5584 _inner_classes(NULL),
5585 _local_interfaces(NULL),
5586 _transitive_interfaces(NULL),
5587 _combined_annotations(NULL),
5588 _annotations(NULL),
5589 _type_annotations(NULL),
5590 _fields_annotations(NULL),
5591 _fields_type_annotations(NULL),
5592 _klass(NULL),
5593 _klass_to_deallocate(NULL),
5594 _parsed_annotations(NULL),
5595 _fac(NULL),
5596 _field_info(NULL),
5597 _method_ordering(NULL),
5598 _all_mirandas(NULL),
5599 _vtable_size(0),
5600 _itable_size(0),
5601 _num_miranda_methods(0),
5602 _rt(REF_NONE),
5603 _protection_domain(protection_domain),
5604 _access_flags(),
5605 _pub_level(pub_level),
5606 _bad_constant_seen(0),
5607 _synthetic_flag(false),
5608 _sde_length(false),
5609 _sde_buffer(NULL),
5610 _sourcefile_index(0),
5611 _generic_signature_index(0),
5612 _major_version(0),
5613 _minor_version(0),
5614 _this_class_index(0),
5615 _super_class_index(0),
5616 _itfs_len(0),
5617 _java_fields_count(0),
5618 _need_verify(false),
5619 _relax_verify(false),
5620 _has_nonstatic_concrete_methods(false),
5621 _declares_nonstatic_concrete_methods(false),
5622 _has_final_method(false),
5623 _has_finalizer(false),
5624 _has_empty_finalizer(false),
5625 _has_vanilla_constructor(false),
5626 _max_bootstrap_specifier_index(-1) {
5627
5628 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5629
5630 assert(THREAD->is_Java_thread(), "invariant");
5631 assert(_loader_data != NULL, "invariant");
5632 assert(stream != NULL, "invariant");
5633 assert(_stream != NULL, "invariant");
5634 assert(_stream->buffer() == _stream->current(), "invariant");
5635 assert(_class_name != NULL, "invariant");
5636 assert(0 == _access_flags.as_int(), "invariant");
5637
5638 // Figure out whether we can skip format checking (matching classic VM behavior)
5639 if (DumpSharedSpaces) {
5640 // verify == true means it's a 'remote' class (i.e., non-boot class)
5641 // Verification decision is based on BytecodeVerificationRemote flag
5642 // for those classes.
5643 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5644 BytecodeVerificationLocal;
5645 }
5646 else {
5647 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5648 stream->need_verify());
5649 }
5650
5651 // synch back verification state to stream
5652 stream->set_verify(_need_verify);
5653
5654 // Check if verification needs to be relaxed for this class file
5655 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5656 _relax_verify = relax_format_check_for(_loader_data);
5657
5658 parse_stream(stream, CHECK);
5659
5660 post_process_parsed_stream(stream, _cp, CHECK);
5661 }
5662
5663 void ClassFileParser::clear_class_metadata() {
5664 // metadata created before the instance klass is created. Must be
5665 // deallocated if classfile parsing returns an error.
5666 _cp = NULL;
5667 _fields = NULL;
5668 _methods = NULL;
5669 _inner_classes = NULL;
5670 _local_interfaces = NULL;
5671 _transitive_interfaces = NULL;
5672 _combined_annotations = NULL;
5673 _annotations = _type_annotations = NULL;
5674 _fields_annotations = _fields_type_annotations = NULL;
5675 }
5676
5677 // Destructor to clean up
5678 ClassFileParser::~ClassFileParser() {
5679 if (_cp != NULL) {
5680 MetadataFactory::free_metadata(_loader_data, _cp);
5681 }
5682 if (_fields != NULL) {
5683 MetadataFactory::free_array<u2>(_loader_data, _fields);
5684 }
5685
5686 if (_methods != NULL) {
5687 // Free methods
5688 InstanceKlass::deallocate_methods(_loader_data, _methods);
5689 }
5690
5691 // beware of the Universe::empty_blah_array!!
5692 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5693 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5694 }
5695
5696 // Free interfaces
5697 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5698 _local_interfaces, _transitive_interfaces);
5699
5700 if (_combined_annotations != NULL) {
5701 // After all annotations arrays have been created, they are installed into the
5702 // Annotations object that will be assigned to the InstanceKlass being created.
5703
5704 // Deallocate the Annotations object and the installed annotations arrays.
5705 _combined_annotations->deallocate_contents(_loader_data);
5706
5707 // If the _combined_annotations pointer is non-NULL,
5708 // then the other annotations fields should have been cleared.
5709 assert(_annotations == NULL, "Should have been cleared");
5710 assert(_type_annotations == NULL, "Should have been cleared");
5711 assert(_fields_annotations == NULL, "Should have been cleared");
5712 assert(_fields_type_annotations == NULL, "Should have been cleared");
5713 } else {
5714 // If the annotations arrays were not installed into the Annotations object,
5715 // then they have to be deallocated explicitly.
5716 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5717 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5718 Annotations::free_contents(_loader_data, _fields_annotations);
5719 Annotations::free_contents(_loader_data, _fields_type_annotations);
5720 }
5721
5722 clear_class_metadata();
5723
5724 // deallocate the klass if already created. Don't directly deallocate, but add
5725 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5726 // at a safepoint.
5727 if (_klass_to_deallocate != NULL) {
5728 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5729 }
5730 }
5731
5732 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5733 TRAPS) {
5734
5735 assert(stream != NULL, "invariant");
5736 assert(_class_name != NULL, "invariant");
5737
5738 // BEGIN STREAM PARSING
5739 stream->guarantee_more(8, CHECK); // magic, major, minor
5740 // Magic value
5741 const u4 magic = stream->get_u4_fast();
5742 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5743 "Incompatible magic value %u in class file %s",
5744 magic, CHECK);
5745
5746 // Version numbers
5747 _minor_version = stream->get_u2_fast();
5748 _major_version = stream->get_u2_fast();
5749
5750 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5751 ResourceMark rm;
5752 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5753 _major_version, _minor_version, _class_name->as_C_string());
5754 Exceptions::fthrow(
5755 THREAD_AND_LOCATION,
5756 vmSymbols::java_lang_UnsupportedClassVersionError(),
5757 "Unsupported major.minor version for dump time %u.%u",
5758 _major_version,
5759 _minor_version);
5760 }
5761
5762 // Check version numbers - we check this even with verifier off
5763 if (!is_supported_version(_major_version, _minor_version)) {
5764 ResourceMark rm(THREAD);
5765 Exceptions::fthrow(
5766 THREAD_AND_LOCATION,
5767 vmSymbols::java_lang_UnsupportedClassVersionError(),
5768 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5769 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
5770 _class_name->as_C_string(),
5771 _major_version,
5772 _minor_version,
5773 JAVA_MAX_SUPPORTED_VERSION,
5774 JAVA_MAX_SUPPORTED_MINOR_VERSION);
5775 return;
5776 }
5777
5778 stream->guarantee_more(3, CHECK); // length, first cp tag
5779 const u2 cp_size = stream->get_u2_fast();
5780
5781 guarantee_property(
5782 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5783 cp_size, CHECK);
5784
5785 _cp = ConstantPool::allocate(_loader_data,
5786 cp_size,
5787 CHECK);
5788
5789 ConstantPool* const cp = _cp;
5790
5791 parse_constant_pool(stream, cp, cp_size, CHECK);
5792
5793 assert(cp_size == (const u2)cp->length(), "invariant");
5794
5795 // ACCESS FLAGS
5796 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5797
5798 // Access flags
5799 jint flags;
5800 // JVM_ACC_MODULE is defined in JDK-9 and later.
5801 if (_major_version >= JAVA_9_VERSION) {
5802 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5803 } else {
5804 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5805 }
5806
5807 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5808 // Set abstract bit for old class files for backward compatibility
5809 flags |= JVM_ACC_ABSTRACT;
5810 }
5811
5812 verify_legal_class_modifiers(flags, CHECK);
5813
5814 short bad_constant = class_bad_constant_seen();
5815 if (bad_constant != 0) {
5816 // Do not throw CFE until after the access_flags are checked because if
5817 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5818 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
5819 }
5820
5821 _access_flags.set_flags(flags);
5822
5823 // This class and superclass
5824 _this_class_index = stream->get_u2_fast();
5825 check_property(
5826 valid_cp_range(_this_class_index, cp_size) &&
5827 cp->tag_at(_this_class_index).is_unresolved_klass(),
5828 "Invalid this class index %u in constant pool in class file %s",
5829 _this_class_index, CHECK);
5830
5831 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5832 assert(class_name_in_cp != NULL, "class_name can't be null");
5833
5834 // Update _class_name which could be null previously
5835 // to reflect the name in the constant pool
5836 _class_name = class_name_in_cp;
5837
5838 // Don't need to check whether this class name is legal or not.
5839 // It has been checked when constant pool is parsed.
5840 // However, make sure it is not an array type.
5841 if (_need_verify) {
5842 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
5843 "Bad class name in class file %s",
5844 CHECK);
5845 }
5846
5847 // Checks if name in class file matches requested name
5848 if (_requested_name != NULL && _requested_name != _class_name) {
5849 ResourceMark rm(THREAD);
5850 Exceptions::fthrow(
5851 THREAD_AND_LOCATION,
5852 vmSymbols::java_lang_NoClassDefFoundError(),
5853 "%s (wrong name: %s)",
5854 _class_name->as_C_string(),
5855 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
5856 );
5857 return;
5858 }
5859
5860 // if this is an anonymous class fix up its name if it's in the unnamed
5861 // package. Otherwise, throw IAE if it is in a different package than
5862 // its host class.
5863 if (_host_klass != NULL) {
5864 fix_anonymous_class_name(CHECK);
5865 }
5866
5867 // Verification prevents us from creating names with dots in them, this
5868 // asserts that that's the case.
5869 assert(is_internal_format(_class_name), "external class name format used internally");
5870
5871 if (!is_internal()) {
5872 if (log_is_enabled(Debug, class, preorder)){
5873 ResourceMark rm(THREAD);
5874 outputStream* log = Log(class, preorder)::debug_stream();
5875 log->print("%s", _class_name->as_klass_external_name());
5876 if (stream->source() != NULL) {
5877 log->print(" source: %s", stream->source());
5878 }
5879 log->cr();
5880 }
5881
5882 #if INCLUDE_CDS
5883 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5884 // Only dump the classes that can be stored into CDS archive.
5885 // Anonymous classes such as generated LambdaForm classes are also not included.
5886 if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
5887 _host_klass == NULL) {
5888 oop class_loader = _loader_data->class_loader();
5889 ResourceMark rm(THREAD);
5890 // For the boot and platform class loaders, check if the class is not found in the
5891 // java runtime image. Additional check for the boot class loader is if the class
5892 // is not found in the boot loader's appended entries. This indicates that the class
5893 // is not useable during run time, such as the ones found in the --patch-module entries,
5894 // so it should not be included in the classlist file.
5895 if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) ||
5896 SystemDictionary::is_platform_class_loader(class_loader)) &&
5897 !ClassLoader::is_jrt(stream->source())) {
5898 tty->print_cr("skip writing class %s from source %s to classlist file",
5899 _class_name->as_C_string(), stream->source());
5900 } else {
5901 classlist_file->print_cr("%s", _class_name->as_C_string());
5902 classlist_file->flush();
5903 }
5904 }
5905 }
5906 #endif
5907 }
5908
5909 // SUPERKLASS
5910 _super_class_index = stream->get_u2_fast();
5911 _super_klass = parse_super_class(cp,
5912 _super_class_index,
5913 _need_verify,
5914 CHECK);
5915
5916 // Interfaces
5917 _itfs_len = stream->get_u2_fast();
5918 parse_interfaces(stream,
5919 _itfs_len,
5920 cp,
5921 &_has_nonstatic_concrete_methods,
5922 CHECK);
5923
5924 assert(_local_interfaces != NULL, "invariant");
5925
5926 // Fields (offsets are filled in later)
5927 _fac = new FieldAllocationCount();
5928 parse_fields(stream,
5929 _access_flags.is_interface(),
5930 _fac,
5931 cp,
5932 cp_size,
5933 &_java_fields_count,
5934 CHECK);
5935
5936 assert(_fields != NULL, "invariant");
5937
5938 // Methods
5939 AccessFlags promoted_flags;
5940 parse_methods(stream,
5941 _access_flags.is_interface(),
5942 &promoted_flags,
5943 &_has_final_method,
5944 &_declares_nonstatic_concrete_methods,
5945 CHECK);
5946
5947 assert(_methods != NULL, "invariant");
5948
5949 // promote flags from parse_methods() to the klass' flags
5950 _access_flags.add_promoted_flags(promoted_flags.as_int());
5951
5952 if (_declares_nonstatic_concrete_methods) {
5953 _has_nonstatic_concrete_methods = true;
5954 }
5955
5956 // Additional attributes/annotations
5957 _parsed_annotations = new ClassAnnotationCollector();
5958 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5959
5960 assert(_inner_classes != NULL, "invariant");
5961
5962 // Finalize the Annotations metadata object,
5963 // now that all annotation arrays have been created.
5964 create_combined_annotations(CHECK);
5965
5966 // Make sure this is the end of class file stream
5967 guarantee_property(stream->at_eos(),
5968 "Extra bytes at the end of class file %s",
5969 CHECK);
5970
5971 // all bytes in stream read and parsed
5972 }
5973
5974 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5975 ConstantPool* cp,
5976 TRAPS) {
5977 assert(stream != NULL, "invariant");
5978 assert(stream->at_eos(), "invariant");
5979 assert(cp != NULL, "invariant");
5980 assert(_loader_data != NULL, "invariant");
5981
5982 if (_class_name == vmSymbols::java_lang_Object()) {
5983 check_property(_local_interfaces == Universe::the_empty_klass_array(),
5984 "java.lang.Object cannot implement an interface in class file %s",
5985 CHECK);
5986 }
5987 // We check super class after class file is parsed and format is checked
5988 if (_super_class_index > 0 && NULL ==_super_klass) {
5989 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5990 if (_access_flags.is_interface()) {
5991 // Before attempting to resolve the superclass, check for class format
5992 // errors not checked yet.
5993 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5994 "Interfaces must have java.lang.Object as superclass in class file %s",
5995 CHECK);
5996 }
5997 Handle loader(THREAD, _loader_data->class_loader());
5998 _super_klass = (const InstanceKlass*)
5999 SystemDictionary::resolve_super_or_fail(_class_name,
6000 super_class_name,
6001 loader,
6002 _protection_domain,
6003 true,
6004 CHECK);
6005 }
6006
6007 if (_super_klass != NULL) {
6008 if (_super_klass->has_nonstatic_concrete_methods()) {
6009 _has_nonstatic_concrete_methods = true;
6010 }
6011
6012 if (_super_klass->is_interface()) {
6013 ResourceMark rm(THREAD);
6014 Exceptions::fthrow(
6015 THREAD_AND_LOCATION,
6016 vmSymbols::java_lang_IncompatibleClassChangeError(),
6017 "class %s has interface %s as super class",
6018 _class_name->as_klass_external_name(),
6019 _super_klass->external_name()
6020 );
6021 return;
6022 }
6023 // Make sure super class is not final
6024 if (_super_klass->is_final()) {
6025 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6026 }
6027 }
6028
6029 // Compute the transitive list of all unique interfaces implemented by this class
6030 _transitive_interfaces =
6031 compute_transitive_interfaces(_super_klass,
6032 _local_interfaces,
6033 _loader_data,
6034 CHECK);
6035
6036 assert(_transitive_interfaces != NULL, "invariant");
6037
6038 // sort methods
6039 _method_ordering = sort_methods(_methods);
6040
6041 _all_mirandas = new GrowableArray<Method*>(20);
6042
6043 Handle loader(THREAD, _loader_data->class_loader());
6044 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6045 &_num_miranda_methods,
6046 _all_mirandas,
6047 _super_klass,
6048 _methods,
6049 _access_flags,
6050 _major_version,
6051 loader,
6052 _class_name,
6053 _local_interfaces,
6054 CHECK);
6055
6056 // Size of Java itable (in words)
6057 _itable_size = _access_flags.is_interface() ? 0 :
6058 klassItable::compute_itable_size(_transitive_interfaces);
6059
6060 assert(_fac != NULL, "invariant");
6061 assert(_parsed_annotations != NULL, "invariant");
6062
6063 _field_info = new FieldLayoutInfo();
6064 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6065
6066 // Compute reference typ
6067 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6068
6069 }
6070
6071 void ClassFileParser::set_klass(InstanceKlass* klass) {
6072
6073 #ifdef ASSERT
6074 if (klass != NULL) {
6075 assert(NULL == _klass, "leaking?");
6076 }
6077 #endif
6078
6079 _klass = klass;
6080 }
6081
6082 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6083
6084 #ifdef ASSERT
6085 if (klass != NULL) {
6086 assert(NULL == _klass_to_deallocate, "leaking?");
6087 }
6088 #endif
6089
6090 _klass_to_deallocate = klass;
6091 }
6092
6093 // Caller responsible for ResourceMark
6094 // clone stream with rewound position
6095 const ClassFileStream* ClassFileParser::clone_stream() const {
6096 assert(_stream != NULL, "invariant");
6097
6098 return _stream->clone();
6099 }
6100 // ----------------------------------------------------------------------------
6101 // debugging
6102
6103 #ifdef ASSERT
6104
6105 // return true if class_name contains no '.' (internal format is '/')
6106 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6107 if (class_name != NULL) {
6108 ResourceMark rm;
6109 char* name = class_name->as_C_string();
6110 return strchr(name, '.') == NULL;
6111 } else {
6112 return true;
6113 }
6114 }
6115
6116 #endif