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/bitMap.inline.hpp"
68 #include "utilities/exceptions.hpp"
69 #include "utilities/globalDefinitions.hpp"
70 #include "utilities/growableArray.hpp"
71 #include "utilities/macros.hpp"
72 #include "utilities/ostream.hpp"
73 #include "utilities/resourceHash.hpp"
74 #if INCLUDE_CDS
75 #include "classfile/systemDictionaryShared.hpp"
76 #endif
77
78 // We generally try to create the oops directly when parsing, rather than
79 // allocating temporary data structures and copying the bytes twice. A
80 // temporary area is only needed when parsing utf8 entries in the constant
81 // pool and when parsing line number tables.
82
83 // We add assert in debug mode when class format is not checked.
84
85 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
86 #define JAVA_MIN_SUPPORTED_VERSION 45
87 #define JAVA_MAX_SUPPORTED_VERSION 53
88 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
89
90 // Used for two backward compatibility reasons:
91 // - to check for new additions to the class file format in JDK1.5
92 // - to check for bug fixes in the format checker in JDK1.5
93 #define JAVA_1_5_VERSION 49
94
95 // Used for backward compatibility reasons:
96 // - to check for javac bug fixes that happened after 1.5
97 // - also used as the max version when running in jdk6
98 #define JAVA_6_VERSION 50
99
100 // Used for backward compatibility reasons:
101 // - to disallow argument and require ACC_STATIC for <clinit> methods
102 #define JAVA_7_VERSION 51
103
104 // Extension method support.
105 #define JAVA_8_VERSION 52
106
107 #define JAVA_9_VERSION 53
108
109 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
110 assert((bad_constant == 19 || bad_constant == 20) && _major_version >= JAVA_9_VERSION,
111 "Unexpected bad constant pool entry");
112 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
113 }
114
115 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
116 ConstantPool* cp,
117 const int length,
118 TRAPS) {
119 assert(stream != NULL, "invariant");
120 assert(cp != NULL, "invariant");
121
122 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
123 // this function (_current can be allocated in a register, with scalar
124 // replacement of aggregates). The _current pointer is copied back to
125 // stream() when this function returns. DON'T call another method within
126 // this method that uses stream().
127 const ClassFileStream cfs1 = *stream;
128 const ClassFileStream* const cfs = &cfs1;
129
130 assert(cfs->allocated_on_stack(), "should be local");
131 debug_only(const u1* const old_current = stream->current();)
132
133 // Used for batching symbol allocations.
134 const char* names[SymbolTable::symbol_alloc_batch_size];
135 int lengths[SymbolTable::symbol_alloc_batch_size];
136 int indices[SymbolTable::symbol_alloc_batch_size];
137 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
138 int names_count = 0;
139
140 // parsing Index 0 is unused
141 for (int index = 1; index < length; index++) {
142 // Each of the following case guarantees one more byte in the stream
143 // for the following tag or the access_flags following constant pool,
144 // so we don't need bounds-check for reading tag.
145 const u1 tag = cfs->get_u1_fast();
146 switch (tag) {
147 case JVM_CONSTANT_Class : {
148 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
149 const u2 name_index = cfs->get_u2_fast();
150 cp->klass_index_at_put(index, name_index);
151 break;
152 }
153 case JVM_CONSTANT_Fieldref: {
154 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
155 const u2 class_index = cfs->get_u2_fast();
156 const u2 name_and_type_index = cfs->get_u2_fast();
157 cp->field_at_put(index, class_index, name_and_type_index);
158 break;
159 }
160 case JVM_CONSTANT_Methodref: {
161 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
162 const u2 class_index = cfs->get_u2_fast();
163 const u2 name_and_type_index = cfs->get_u2_fast();
164 cp->method_at_put(index, class_index, name_and_type_index);
165 break;
166 }
167 case JVM_CONSTANT_InterfaceMethodref: {
168 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
169 const u2 class_index = cfs->get_u2_fast();
170 const u2 name_and_type_index = cfs->get_u2_fast();
171 cp->interface_method_at_put(index, class_index, name_and_type_index);
172 break;
173 }
174 case JVM_CONSTANT_String : {
175 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
176 const u2 string_index = cfs->get_u2_fast();
177 cp->string_index_at_put(index, string_index);
178 break;
179 }
180 case JVM_CONSTANT_MethodHandle :
181 case JVM_CONSTANT_MethodType: {
182 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
183 classfile_parse_error(
184 "Class file version does not support constant tag %u in class file %s",
185 tag, CHECK);
186 }
187 if (tag == JVM_CONSTANT_MethodHandle) {
188 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
189 const u1 ref_kind = cfs->get_u1_fast();
190 const u2 method_index = cfs->get_u2_fast();
191 cp->method_handle_index_at_put(index, ref_kind, method_index);
192 }
193 else if (tag == JVM_CONSTANT_MethodType) {
194 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
195 const u2 signature_index = cfs->get_u2_fast();
196 cp->method_type_index_at_put(index, signature_index);
197 }
198 else {
199 ShouldNotReachHere();
200 }
201 break;
202 }
203 case JVM_CONSTANT_InvokeDynamic : {
204 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
205 classfile_parse_error(
206 "Class file version does not support constant tag %u in class file %s",
207 tag, CHECK);
208 }
209 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
210 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
211 const u2 name_and_type_index = cfs->get_u2_fast();
212 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
213 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
214 }
215 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
216 break;
217 }
218 case JVM_CONSTANT_Integer: {
219 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
220 const u4 bytes = cfs->get_u4_fast();
221 cp->int_at_put(index, (jint)bytes);
222 break;
223 }
224 case JVM_CONSTANT_Float: {
225 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
226 const u4 bytes = cfs->get_u4_fast();
227 cp->float_at_put(index, *(jfloat*)&bytes);
228 break;
229 }
230 case JVM_CONSTANT_Long: {
231 // A mangled type might cause you to overrun allocated memory
232 guarantee_property(index + 1 < length,
233 "Invalid constant pool entry %u in class file %s",
234 index,
235 CHECK);
236 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
237 const u8 bytes = cfs->get_u8_fast();
238 cp->long_at_put(index, bytes);
239 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
240 break;
241 }
242 case JVM_CONSTANT_Double: {
243 // A mangled type might cause you to overrun allocated memory
244 guarantee_property(index+1 < length,
245 "Invalid constant pool entry %u in class file %s",
246 index,
247 CHECK);
248 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
249 const u8 bytes = cfs->get_u8_fast();
250 cp->double_at_put(index, *(jdouble*)&bytes);
251 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
252 break;
253 }
254 case JVM_CONSTANT_NameAndType: {
255 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
256 const u2 name_index = cfs->get_u2_fast();
257 const u2 signature_index = cfs->get_u2_fast();
258 cp->name_and_type_at_put(index, name_index, signature_index);
259 break;
260 }
261 case JVM_CONSTANT_Utf8 : {
262 cfs->guarantee_more(2, CHECK); // utf8_length
263 u2 utf8_length = cfs->get_u2_fast();
264 const u1* utf8_buffer = cfs->current();
265 assert(utf8_buffer != NULL, "null utf8 buffer");
266 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
267 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
268 cfs->skip_u1_fast(utf8_length);
269
270 // Before storing the symbol, make sure it's legal
271 if (_need_verify) {
272 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
273 }
274
275 if (has_cp_patch_at(index)) {
276 Handle patch = clear_cp_patch_at(index);
277 guarantee_property(java_lang_String::is_instance(patch()),
278 "Illegal utf8 patch at %d in class file %s",
279 index,
280 CHECK);
281 const char* const str = java_lang_String::as_utf8_string(patch());
282 // (could use java_lang_String::as_symbol instead, but might as well batch them)
283 utf8_buffer = (const u1*) str;
284 utf8_length = (int) strlen(str);
285 }
286
287 unsigned int hash;
288 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
289 utf8_length,
290 hash);
291 if (result == NULL) {
292 names[names_count] = (const char*)utf8_buffer;
293 lengths[names_count] = utf8_length;
294 indices[names_count] = index;
295 hashValues[names_count++] = hash;
296 if (names_count == SymbolTable::symbol_alloc_batch_size) {
297 SymbolTable::new_symbols(_loader_data,
298 cp,
299 names_count,
300 names,
301 lengths,
302 indices,
303 hashValues,
304 CHECK);
305 names_count = 0;
306 }
307 } else {
308 cp->symbol_at_put(index, result);
309 }
310 break;
311 }
312 case 19:
313 case 20: {
314 // Record that an error occurred in these two cases but keep parsing so
315 // that ACC_Module can be checked for in the access_flags. Need to
316 // throw NoClassDefFoundError in that case.
317 if (_major_version >= JAVA_9_VERSION) {
318 cfs->guarantee_more(3, CHECK);
319 cfs->get_u2_fast();
320 set_class_bad_constant_seen(tag);
321 break;
322 }
323 }
324 default: {
325 classfile_parse_error("Unknown constant tag %u in class file %s",
326 tag,
327 CHECK);
328 break;
329 }
330 } // end of switch(tag)
331 } // end of for
332
333 // Allocate the remaining symbols
334 if (names_count > 0) {
335 SymbolTable::new_symbols(_loader_data,
336 cp,
337 names_count,
338 names,
339 lengths,
340 indices,
341 hashValues,
342 CHECK);
343 }
344
345 // Copy _current pointer of local copy back to stream.
346 assert(stream->current() == old_current, "non-exclusive use of stream");
347 stream->set_current(cfs1.current());
348
349 }
350
351 static inline bool valid_cp_range(int index, int length) {
352 return (index > 0 && index < length);
353 }
354
355 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
356 assert(cp != NULL, "invariant");
357 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
358 return cp->symbol_at(index);
359 }
360 return NULL;
361 }
362
363 #ifdef ASSERT
364 PRAGMA_DIAG_PUSH
365 PRAGMA_FORMAT_NONLITERAL_IGNORED
366 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
367 ResourceMark rm(THREAD);
368 fatal(msg, _class_name->as_C_string());
369 }
370
371 void ClassFileParser::report_assert_property_failure(const char* msg,
372 int index,
373 TRAPS) const {
374 ResourceMark rm(THREAD);
375 fatal(msg, index, _class_name->as_C_string());
376 }
377 PRAGMA_DIAG_POP
378 #endif
379
380 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
381 ConstantPool* const cp,
382 const int length,
383 TRAPS) {
384 assert(cp != NULL, "invariant");
385 assert(stream != NULL, "invariant");
386
387 // parsing constant pool entries
388 parse_constant_pool_entries(stream, cp, length, CHECK);
389 if (class_bad_constant_seen() != 0) {
390 // a bad CP entry has been detected previously so stop parsing and just return.
391 return;
392 }
393
394 int index = 1; // declared outside of loops for portability
395 int num_klasses = 0;
396
397 // first verification pass - validate cross references
398 // and fixup class and string constants
399 for (index = 1; index < length; index++) { // Index 0 is unused
400 const jbyte tag = cp->tag_at(index).value();
401 switch (tag) {
402 case JVM_CONSTANT_Class: {
403 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
404 break;
405 }
406 case JVM_CONSTANT_Fieldref:
407 // fall through
408 case JVM_CONSTANT_Methodref:
409 // fall through
410 case JVM_CONSTANT_InterfaceMethodref: {
411 if (!_need_verify) break;
412 const int klass_ref_index = cp->klass_ref_index_at(index);
413 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
414 check_property(valid_klass_reference_at(klass_ref_index),
415 "Invalid constant pool index %u in class file %s",
416 klass_ref_index, CHECK);
417 check_property(valid_cp_range(name_and_type_ref_index, length) &&
418 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
419 "Invalid constant pool index %u in class file %s",
420 name_and_type_ref_index, CHECK);
421 break;
422 }
423 case JVM_CONSTANT_String: {
424 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
425 break;
426 }
427 case JVM_CONSTANT_Integer:
428 break;
429 case JVM_CONSTANT_Float:
430 break;
431 case JVM_CONSTANT_Long:
432 case JVM_CONSTANT_Double: {
433 index++;
434 check_property(
435 (index < length && cp->tag_at(index).is_invalid()),
436 "Improper constant pool long/double index %u in class file %s",
437 index, CHECK);
438 break;
439 }
440 case JVM_CONSTANT_NameAndType: {
441 if (!_need_verify) break;
442 const int name_ref_index = cp->name_ref_index_at(index);
443 const int signature_ref_index = cp->signature_ref_index_at(index);
444 check_property(valid_symbol_at(name_ref_index),
445 "Invalid constant pool index %u in class file %s",
446 name_ref_index, CHECK);
447 check_property(valid_symbol_at(signature_ref_index),
448 "Invalid constant pool index %u in class file %s",
449 signature_ref_index, CHECK);
450 break;
451 }
452 case JVM_CONSTANT_Utf8:
453 break;
454 case JVM_CONSTANT_UnresolvedClass: // fall-through
455 case JVM_CONSTANT_UnresolvedClassInError: {
456 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
457 break;
458 }
459 case JVM_CONSTANT_ClassIndex: {
460 const int class_index = cp->klass_index_at(index);
461 check_property(valid_symbol_at(class_index),
462 "Invalid constant pool index %u in class file %s",
463 class_index, CHECK);
464 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
465 break;
466 }
467 case JVM_CONSTANT_StringIndex: {
468 const int string_index = cp->string_index_at(index);
469 check_property(valid_symbol_at(string_index),
470 "Invalid constant pool index %u in class file %s",
471 string_index, CHECK);
472 Symbol* const sym = cp->symbol_at(string_index);
473 cp->unresolved_string_at_put(index, sym);
474 break;
475 }
476 case JVM_CONSTANT_MethodHandle: {
477 const int ref_index = cp->method_handle_index_at(index);
478 check_property(valid_cp_range(ref_index, length),
479 "Invalid constant pool index %u in class file %s",
480 ref_index, CHECK);
481 const constantTag tag = cp->tag_at(ref_index);
482 const int ref_kind = cp->method_handle_ref_kind_at(index);
483
484 switch (ref_kind) {
485 case JVM_REF_getField:
486 case JVM_REF_getStatic:
487 case JVM_REF_putField:
488 case JVM_REF_putStatic: {
489 check_property(
490 tag.is_field(),
491 "Invalid constant pool index %u in class file %s (not a field)",
492 ref_index, CHECK);
493 break;
494 }
495 case JVM_REF_invokeVirtual:
496 case JVM_REF_newInvokeSpecial: {
497 check_property(
498 tag.is_method(),
499 "Invalid constant pool index %u in class file %s (not a method)",
500 ref_index, CHECK);
501 break;
502 }
503 case JVM_REF_invokeStatic:
504 case JVM_REF_invokeSpecial: {
505 check_property(
506 tag.is_method() ||
507 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
508 "Invalid constant pool index %u in class file %s (not a method)",
509 ref_index, CHECK);
510 break;
511 }
512 case JVM_REF_invokeInterface: {
513 check_property(
514 tag.is_interface_method(),
515 "Invalid constant pool index %u in class file %s (not an interface method)",
516 ref_index, CHECK);
517 break;
518 }
519 default: {
520 classfile_parse_error(
521 "Bad method handle kind at constant pool index %u in class file %s",
522 index, CHECK);
523 }
524 } // switch(refkind)
525 // Keep the ref_index unchanged. It will be indirected at link-time.
526 break;
527 } // case MethodHandle
528 case JVM_CONSTANT_MethodType: {
529 const int ref_index = cp->method_type_index_at(index);
530 check_property(valid_symbol_at(ref_index),
531 "Invalid constant pool index %u in class file %s",
532 ref_index, CHECK);
533 break;
534 }
535 case JVM_CONSTANT_InvokeDynamic: {
536 const int name_and_type_ref_index =
537 cp->invoke_dynamic_name_and_type_ref_index_at(index);
538
539 check_property(valid_cp_range(name_and_type_ref_index, length) &&
540 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
541 "Invalid constant pool index %u in class file %s",
542 name_and_type_ref_index, CHECK);
543 // bootstrap specifier index must be checked later,
544 // when BootstrapMethods attr is available
545 break;
546 }
547 default: {
548 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
549 ShouldNotReachHere();
550 break;
551 }
552 } // switch(tag)
553 } // end of for
554
555 _first_patched_klass_resolved_index = num_klasses;
556 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
557
558 if (_cp_patches != NULL) {
559 // need to treat this_class specially...
560
561 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
562 // for now. These will be replaced with actual names of the patched classes in patch_class().
563 Symbol* s = vmSymbols::star_name();
564 for (int n=_orig_cp_size; n<cp->length(); n++) {
565 cp->symbol_at_put(n, s);
566 }
567
568 int this_class_index;
569 {
570 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
571 const u1* const mark = stream->current();
572 stream->skip_u2_fast(1); // skip flags
573 this_class_index = stream->get_u2_fast();
574 stream->set_current(mark); // revert to mark
575 }
576
577 for (index = 1; index < length; index++) { // Index 0 is unused
578 if (has_cp_patch_at(index)) {
579 guarantee_property(index != this_class_index,
580 "Illegal constant pool patch to self at %d in class file %s",
581 index, CHECK);
582 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
583 }
584 }
585 }
586
587 if (!_need_verify) {
588 return;
589 }
590
591 // second verification pass - checks the strings are of the right format.
592 // but not yet to the other entries
593 for (index = 1; index < length; index++) {
594 const jbyte tag = cp->tag_at(index).value();
595 switch (tag) {
596 case JVM_CONSTANT_UnresolvedClass: {
597 const Symbol* const class_name = cp->klass_name_at(index);
598 // check the name, even if _cp_patches will overwrite it
599 verify_legal_class_name(class_name, CHECK);
600 break;
601 }
602 case JVM_CONSTANT_NameAndType: {
603 if (_need_verify) {
604 const int sig_index = cp->signature_ref_index_at(index);
605 const int name_index = cp->name_ref_index_at(index);
606 const Symbol* const name = cp->symbol_at(name_index);
607 const Symbol* const sig = cp->symbol_at(sig_index);
608 guarantee_property(sig->utf8_length() != 0,
609 "Illegal zero length constant pool entry at %d in class %s",
610 sig_index, CHECK);
611 guarantee_property(name->utf8_length() != 0,
612 "Illegal zero length constant pool entry at %d in class %s",
613 name_index, CHECK);
614
615 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
616 // Format check method name and signature
617 verify_legal_method_name(name, CHECK);
618 verify_legal_method_signature(name, sig, CHECK);
619 } else {
620 // Format check field name and signature
621 verify_legal_field_name(name, CHECK);
622 verify_legal_field_signature(name, sig, CHECK);
623 }
624 }
625 break;
626 }
627 case JVM_CONSTANT_InvokeDynamic:
628 case JVM_CONSTANT_Fieldref:
629 case JVM_CONSTANT_Methodref:
630 case JVM_CONSTANT_InterfaceMethodref: {
631 const int name_and_type_ref_index =
632 cp->name_and_type_ref_index_at(index);
633 // already verified to be utf8
634 const int name_ref_index =
635 cp->name_ref_index_at(name_and_type_ref_index);
636 // already verified to be utf8
637 const int signature_ref_index =
638 cp->signature_ref_index_at(name_and_type_ref_index);
639 const Symbol* const name = cp->symbol_at(name_ref_index);
640 const Symbol* const signature = cp->symbol_at(signature_ref_index);
641 if (tag == JVM_CONSTANT_Fieldref) {
642 if (_need_verify) {
643 // Field name and signature are verified above, when iterating NameAndType_info.
644 // Need only to be sure signature is non-zero length and the right type.
645 if (signature->utf8_length() == 0 ||
646 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
647 throwIllegalSignature("Field", name, signature, CHECK);
648 }
649 }
650 } else {
651 if (_need_verify) {
652 // Method name and signature are verified above, when iterating NameAndType_info.
653 // Need only to be sure signature is non-zero length and the right type.
654 if (signature->utf8_length() == 0 ||
655 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
656 throwIllegalSignature("Method", name, signature, CHECK);
657 }
658 }
659 // 4509014: If a class method name begins with '<', it must be "<init>"
660 const unsigned int name_len = name->utf8_length();
661 if (tag == JVM_CONSTANT_Methodref &&
662 name_len != 0 &&
663 name->byte_at(0) == '<' &&
664 name != vmSymbols::object_initializer_name()) {
665 classfile_parse_error(
666 "Bad method name at constant pool index %u in class file %s",
667 name_ref_index, CHECK);
668 }
669 }
670 break;
671 }
672 case JVM_CONSTANT_MethodHandle: {
673 const int ref_index = cp->method_handle_index_at(index);
674 const int ref_kind = cp->method_handle_ref_kind_at(index);
675 switch (ref_kind) {
676 case JVM_REF_invokeVirtual:
677 case JVM_REF_invokeStatic:
678 case JVM_REF_invokeSpecial:
679 case JVM_REF_newInvokeSpecial: {
680 const int name_and_type_ref_index =
681 cp->name_and_type_ref_index_at(ref_index);
682 const int name_ref_index =
683 cp->name_ref_index_at(name_and_type_ref_index);
684 const Symbol* const name = cp->symbol_at(name_ref_index);
685 if (ref_kind == JVM_REF_newInvokeSpecial) {
686 if (name != vmSymbols::object_initializer_name()) {
687 classfile_parse_error(
688 "Bad constructor name at constant pool index %u in class file %s",
689 name_ref_index, CHECK);
690 }
691 } else {
692 if (name == vmSymbols::object_initializer_name()) {
693 classfile_parse_error(
694 "Bad method name at constant pool index %u in class file %s",
695 name_ref_index, CHECK);
696 }
697 }
698 break;
699 }
700 // Other ref_kinds are already fully checked in previous pass.
701 } // switch(ref_kind)
702 break;
703 }
704 case JVM_CONSTANT_MethodType: {
705 const Symbol* const no_name = vmSymbols::type_name(); // place holder
706 const Symbol* const signature = cp->method_type_signature_at(index);
707 verify_legal_method_signature(no_name, signature, CHECK);
708 break;
709 }
710 case JVM_CONSTANT_Utf8: {
711 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
712 }
713 } // switch(tag)
714 } // end of for
715 }
716
717 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
718 int name_index = _orig_cp_size + _num_patched_klasses;
719 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
720
721 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
722 _num_patched_klasses ++;
723 }
724
725 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
726 int index,
727 Handle patch,
728 TRAPS) {
729 assert(cp != NULL, "invariant");
730
731 BasicType patch_type = T_VOID;
732
733 switch (cp->tag_at(index).value()) {
734
735 case JVM_CONSTANT_UnresolvedClass: {
736 // Patching a class means pre-resolving it.
737 // The name in the constant pool is ignored.
738 if (java_lang_Class::is_instance(patch())) {
739 guarantee_property(!java_lang_Class::is_primitive(patch()),
740 "Illegal class patch at %d in class file %s",
741 index, CHECK);
742 Klass* k = java_lang_Class::as_Klass(patch());
743 patch_class(cp, index, k, k->name());
744 } else {
745 guarantee_property(java_lang_String::is_instance(patch()),
746 "Illegal class patch at %d in class file %s",
747 index, CHECK);
748 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
749 patch_class(cp, index, NULL, name);
750 }
751 break;
752 }
753
754 case JVM_CONSTANT_String: {
755 // skip this patch and don't clear it. Needs the oop array for resolved
756 // references to be created first.
757 return;
758 }
759 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
760 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
761 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
762 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
763 patch_prim:
764 {
765 jvalue value;
766 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
767 guarantee_property(value_type == patch_type,
768 "Illegal primitive patch at %d in class file %s",
769 index, CHECK);
770 switch (value_type) {
771 case T_INT: cp->int_at_put(index, value.i); break;
772 case T_FLOAT: cp->float_at_put(index, value.f); break;
773 case T_LONG: cp->long_at_put(index, value.j); break;
774 case T_DOUBLE: cp->double_at_put(index, value.d); break;
775 default: assert(false, "");
776 }
777 } // end patch_prim label
778 break;
779
780 default: {
781 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
782 guarantee_property(!has_cp_patch_at(index),
783 "Illegal unexpected patch at %d in class file %s",
784 index, CHECK);
785 return;
786 }
787 } // end of switch(tag)
788
789 // On fall-through, mark the patch as used.
790 clear_cp_patch_at(index);
791 }
792 class NameSigHash: public ResourceObj {
793 public:
794 const Symbol* _name; // name
795 const Symbol* _sig; // signature
796 NameSigHash* _next; // Next entry in hash table
797 };
798
799 static const int HASH_ROW_SIZE = 256;
800
801 static unsigned int hash(const Symbol* name, const Symbol* sig) {
802 unsigned int raw_hash = 0;
803 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
804 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
805
806 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
807 }
808
809
810 static void initialize_hashtable(NameSigHash** table) {
811 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
812 }
813 // Return false if the name/sig combination is found in table.
814 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
815 // The old format checker uses heap sort to find duplicates.
816 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
817 // of table since we don't expect Symbol*'s to move.
818 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
819 assert(name != NULL, "name in constant pool is NULL");
820
821 // First lookup for duplicates
822 int index = hash(name, sig);
823 NameSigHash* entry = table[index];
824 while (entry != NULL) {
825 if (entry->_name == name && entry->_sig == sig) {
826 return false;
827 }
828 entry = entry->_next;
829 }
830
831 // No duplicate is found, allocate a new entry and fill it.
832 entry = new NameSigHash();
833 entry->_name = name;
834 entry->_sig = sig;
835
836 // Insert into hash table
837 entry->_next = table[index];
838 table[index] = entry;
839
840 return true;
841 }
842
843 // Side-effects: populates the _local_interfaces field
844 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
845 const int itfs_len,
846 ConstantPool* const cp,
847 bool* const has_nonstatic_concrete_methods,
848 TRAPS) {
849 assert(stream != NULL, "invariant");
850 assert(cp != NULL, "invariant");
851 assert(has_nonstatic_concrete_methods != NULL, "invariant");
852
853 if (itfs_len == 0) {
854 _local_interfaces = Universe::the_empty_klass_array();
855 } else {
856 assert(itfs_len > 0, "only called for len>0");
857 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
858
859 int index;
860 for (index = 0; index < itfs_len; index++) {
861 const u2 interface_index = stream->get_u2(CHECK);
862 Klass* interf;
863 check_property(
864 valid_klass_reference_at(interface_index),
865 "Interface name has bad constant pool index %u in class file %s",
866 interface_index, CHECK);
867 if (cp->tag_at(interface_index).is_klass()) {
868 interf = cp->resolved_klass_at(interface_index);
869 } else {
870 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
871
872 // Don't need to check legal name because it's checked when parsing constant pool.
873 // But need to make sure it's not an array type.
874 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
875 "Bad interface name in class file %s", CHECK);
876
877 // Call resolve_super so classcircularity is checked
878 interf = SystemDictionary::resolve_super_or_fail(
879 _class_name,
880 unresolved_klass,
881 Handle(THREAD, _loader_data->class_loader()),
882 _protection_domain,
883 false,
884 CHECK);
885 }
886
887 if (!interf->is_interface()) {
888 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
889 "Implementing class");
890 }
891
892 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
893 *has_nonstatic_concrete_methods = true;
894 }
895 _local_interfaces->at_put(index, interf);
896 }
897
898 if (!_need_verify || itfs_len <= 1) {
899 return;
900 }
901
902 // Check if there's any duplicates in interfaces
903 ResourceMark rm(THREAD);
904 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
905 NameSigHash*,
906 HASH_ROW_SIZE);
907 initialize_hashtable(interface_names);
908 bool dup = false;
909 const Symbol* name = NULL;
910 {
911 debug_only(NoSafepointVerifier nsv;)
912 for (index = 0; index < itfs_len; index++) {
913 const Klass* const k = _local_interfaces->at(index);
914 name = InstanceKlass::cast(k)->name();
915 // If no duplicates, add (name, NULL) in hashtable interface_names.
916 if (!put_after_lookup(name, NULL, interface_names)) {
917 dup = true;
918 break;
919 }
920 }
921 }
922 if (dup) {
923 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
924 name->as_C_string(), CHECK);
925 }
926 }
927 }
928
929 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
930 int constantvalue_index,
931 int signature_index,
932 TRAPS) const {
933 // Make sure the constant pool entry is of a type appropriate to this field
934 guarantee_property(
935 (constantvalue_index > 0 &&
936 constantvalue_index < cp->length()),
937 "Bad initial value index %u in ConstantValue attribute in class file %s",
938 constantvalue_index, CHECK);
939
940 const constantTag value_type = cp->tag_at(constantvalue_index);
941 switch(cp->basic_type_for_signature_at(signature_index)) {
942 case T_LONG: {
943 guarantee_property(value_type.is_long(),
944 "Inconsistent constant value type in class file %s",
945 CHECK);
946 break;
947 }
948 case T_FLOAT: {
949 guarantee_property(value_type.is_float(),
950 "Inconsistent constant value type in class file %s",
951 CHECK);
952 break;
953 }
954 case T_DOUBLE: {
955 guarantee_property(value_type.is_double(),
956 "Inconsistent constant value type in class file %s",
957 CHECK);
958 break;
959 }
960 case T_BYTE:
961 case T_CHAR:
962 case T_SHORT:
963 case T_BOOLEAN:
964 case T_INT: {
965 guarantee_property(value_type.is_int(),
966 "Inconsistent constant value type in class file %s",
967 CHECK);
968 break;
969 }
970 case T_OBJECT: {
971 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
972 && value_type.is_string()),
973 "Bad string initial value in class file %s",
974 CHECK);
975 break;
976 }
977 default: {
978 classfile_parse_error("Unable to set initial value %u in class file %s",
979 constantvalue_index,
980 CHECK);
981 }
982 }
983 }
984
985 class AnnotationCollector : public ResourceObj{
986 public:
987 enum Location { _in_field, _in_method, _in_class };
988 enum ID {
989 _unknown = 0,
990 _method_CallerSensitive,
991 _method_ForceInline,
992 _method_DontInline,
993 _method_InjectedProfile,
994 _method_LambdaForm_Compiled,
995 _method_LambdaForm_Hidden,
996 _method_HotSpotIntrinsicCandidate,
997 _jdk_internal_vm_annotation_Contended,
998 _field_Stable,
999 _jdk_internal_vm_annotation_ReservedStackAccess,
1000 _annotation_LIMIT
1001 };
1002 const Location _location;
1003 int _annotations_present;
1004 u2 _contended_group;
1005
1006 AnnotationCollector(Location location)
1007 : _location(location), _annotations_present(0)
1008 {
1009 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1010 }
1011 // If this annotation name has an ID, report it (or _none).
1012 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1013 // Set the annotation name:
1014 void set_annotation(ID id) {
1015 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1016 _annotations_present |= nth_bit((int)id);
1017 }
1018
1019 void remove_annotation(ID id) {
1020 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1021 _annotations_present &= ~nth_bit((int)id);
1022 }
1023
1024 // Report if the annotation is present.
1025 bool has_any_annotations() const { return _annotations_present != 0; }
1026 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1027
1028 void set_contended_group(u2 group) { _contended_group = group; }
1029 u2 contended_group() const { return _contended_group; }
1030
1031 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1032
1033 void set_stable(bool stable) { set_annotation(_field_Stable); }
1034 bool is_stable() const { return has_annotation(_field_Stable); }
1035 };
1036
1037 // This class also doubles as a holder for metadata cleanup.
1038 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1039 private:
1040 ClassLoaderData* _loader_data;
1041 AnnotationArray* _field_annotations;
1042 AnnotationArray* _field_type_annotations;
1043 public:
1044 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1045 AnnotationCollector(_in_field),
1046 _loader_data(loader_data),
1047 _field_annotations(NULL),
1048 _field_type_annotations(NULL) {}
1049 ~FieldAnnotationCollector();
1050 void apply_to(FieldInfo* f);
1051 AnnotationArray* field_annotations() { return _field_annotations; }
1052 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1053
1054 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1055 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1056 };
1057
1058 class MethodAnnotationCollector : public AnnotationCollector{
1059 public:
1060 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1061 void apply_to(methodHandle m);
1062 };
1063
1064 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1065 public:
1066 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1067 void apply_to(InstanceKlass* ik);
1068 };
1069
1070
1071 static int skip_annotation_value(const u1*, int, int); // fwd decl
1072
1073 // Safely increment index by val if does not pass limit
1074 #define SAFE_ADD(index, limit, val) \
1075 if (index >= limit - val) return limit; \
1076 index += val;
1077
1078 // Skip an annotation. Return >=limit if there is any problem.
1079 static int skip_annotation(const u1* buffer, int limit, int index) {
1080 assert(buffer != NULL, "invariant");
1081 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1082 // value := switch (tag:u1) { ... }
1083 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1084 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1085 while (--nmem >= 0 && index < limit) {
1086 SAFE_ADD(index, limit, 2); // skip member
1087 index = skip_annotation_value(buffer, limit, index);
1088 }
1089 return index;
1090 }
1091
1092 // Skip an annotation value. Return >=limit if there is any problem.
1093 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1094 assert(buffer != NULL, "invariant");
1095
1096 // value := switch (tag:u1) {
1097 // case B, C, I, S, Z, D, F, J, c: con:u2;
1098 // case e: e_class:u2 e_name:u2;
1099 // case s: s_con:u2;
1100 // case [: do(nval:u2) {value};
1101 // case @: annotation;
1102 // case s: s_con:u2;
1103 // }
1104 SAFE_ADD(index, limit, 1); // read tag
1105 const u1 tag = buffer[index - 1];
1106 switch (tag) {
1107 case 'B':
1108 case 'C':
1109 case 'I':
1110 case 'S':
1111 case 'Z':
1112 case 'D':
1113 case 'F':
1114 case 'J':
1115 case 'c':
1116 case 's':
1117 SAFE_ADD(index, limit, 2); // skip con or s_con
1118 break;
1119 case 'e':
1120 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1121 break;
1122 case '[':
1123 {
1124 SAFE_ADD(index, limit, 2); // read nval
1125 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1126 while (--nval >= 0 && index < limit) {
1127 index = skip_annotation_value(buffer, limit, index);
1128 }
1129 }
1130 break;
1131 case '@':
1132 index = skip_annotation(buffer, limit, index);
1133 break;
1134 default:
1135 return limit; // bad tag byte
1136 }
1137 return index;
1138 }
1139
1140 // Sift through annotations, looking for those significant to the VM:
1141 static void parse_annotations(const ConstantPool* const cp,
1142 const u1* buffer, int limit,
1143 AnnotationCollector* coll,
1144 ClassLoaderData* loader_data,
1145 TRAPS) {
1146
1147 assert(cp != NULL, "invariant");
1148 assert(buffer != NULL, "invariant");
1149 assert(coll != NULL, "invariant");
1150 assert(loader_data != NULL, "invariant");
1151
1152 // annotations := do(nann:u2) {annotation}
1153 int index = 2; // read nann
1154 if (index >= limit) return;
1155 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1156 enum { // initial annotation layout
1157 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1158 count_off = 2, // u2 such as 1 (one value)
1159 member_off = 4, // utf8 such as 'value'
1160 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1161 e_tag_val = 'e',
1162 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1163 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1164 e_size = 11, // end of 'e' annotation
1165 c_tag_val = 'c', // payload is type
1166 c_con_off = 7, // utf8 payload, such as 'I'
1167 c_size = 9, // end of 'c' annotation
1168 s_tag_val = 's', // payload is String
1169 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1170 s_size = 9,
1171 min_size = 6 // smallest possible size (zero members)
1172 };
1173 // Cannot add min_size to index in case of overflow MAX_INT
1174 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1175 int index0 = index;
1176 index = skip_annotation(buffer, limit, index);
1177 const u1* const abase = buffer + index0;
1178 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1179 const int count = Bytes::get_Java_u2((address)abase + count_off);
1180 const Symbol* const aname = check_symbol_at(cp, atype);
1181 if (aname == NULL) break; // invalid annotation name
1182 const Symbol* member = NULL;
1183 if (count >= 1) {
1184 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1185 member = check_symbol_at(cp, member_index);
1186 if (member == NULL) break; // invalid member name
1187 }
1188
1189 // Here is where parsing particular annotations will take place.
1190 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1191 if (AnnotationCollector::_unknown == id) continue;
1192 coll->set_annotation(id);
1193
1194 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1195 // @Contended can optionally specify the contention group.
1196 //
1197 // Contended group defines the equivalence class over the fields:
1198 // the fields within the same contended group are not treated distinct.
1199 // The only exception is default group, which does not incur the
1200 // equivalence. Naturally, contention group for classes is meaningless.
1201 //
1202 // While the contention group is specified as String, annotation
1203 // values are already interned, and we might as well use the constant
1204 // pool index as the group tag.
1205 //
1206 u2 group_index = 0; // default contended group
1207 if (count == 1
1208 && s_size == (index - index0) // match size
1209 && s_tag_val == *(abase + tag_off)
1210 && member == vmSymbols::value_name()) {
1211 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1212 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1213 group_index = 0; // default contended group
1214 }
1215 }
1216 coll->set_contended_group(group_index);
1217 }
1218 }
1219 }
1220
1221
1222 // Parse attributes for a field.
1223 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1224 u2 attributes_count,
1225 bool is_static, u2 signature_index,
1226 u2* const constantvalue_index_addr,
1227 bool* const is_synthetic_addr,
1228 u2* const generic_signature_index_addr,
1229 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1230 TRAPS) {
1231 assert(cfs != NULL, "invariant");
1232 assert(constantvalue_index_addr != NULL, "invariant");
1233 assert(is_synthetic_addr != NULL, "invariant");
1234 assert(generic_signature_index_addr != NULL, "invariant");
1235 assert(parsed_annotations != NULL, "invariant");
1236 assert(attributes_count > 0, "attributes_count should be greater than 0");
1237
1238 u2 constantvalue_index = 0;
1239 u2 generic_signature_index = 0;
1240 bool is_synthetic = false;
1241 const u1* runtime_visible_annotations = NULL;
1242 int runtime_visible_annotations_length = 0;
1243 const u1* runtime_invisible_annotations = NULL;
1244 int runtime_invisible_annotations_length = 0;
1245 const u1* runtime_visible_type_annotations = NULL;
1246 int runtime_visible_type_annotations_length = 0;
1247 const u1* runtime_invisible_type_annotations = NULL;
1248 int runtime_invisible_type_annotations_length = 0;
1249 bool runtime_invisible_annotations_exists = false;
1250 bool runtime_invisible_type_annotations_exists = false;
1251 const ConstantPool* const cp = _cp;
1252
1253 while (attributes_count--) {
1254 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1255 const u2 attribute_name_index = cfs->get_u2_fast();
1256 const u4 attribute_length = cfs->get_u4_fast();
1257 check_property(valid_symbol_at(attribute_name_index),
1258 "Invalid field attribute index %u in class file %s",
1259 attribute_name_index,
1260 CHECK);
1261
1262 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1263 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1264 // ignore if non-static
1265 if (constantvalue_index != 0) {
1266 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1267 }
1268 check_property(
1269 attribute_length == 2,
1270 "Invalid ConstantValue field attribute length %u in class file %s",
1271 attribute_length, CHECK);
1272
1273 constantvalue_index = cfs->get_u2(CHECK);
1274 if (_need_verify) {
1275 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1276 }
1277 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1278 if (attribute_length != 0) {
1279 classfile_parse_error(
1280 "Invalid Synthetic field attribute length %u in class file %s",
1281 attribute_length, CHECK);
1282 }
1283 is_synthetic = true;
1284 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1285 if (attribute_length != 0) {
1286 classfile_parse_error(
1287 "Invalid Deprecated field attribute length %u in class file %s",
1288 attribute_length, CHECK);
1289 }
1290 } else if (_major_version >= JAVA_1_5_VERSION) {
1291 if (attribute_name == vmSymbols::tag_signature()) {
1292 if (generic_signature_index != 0) {
1293 classfile_parse_error(
1294 "Multiple Signature attributes for field in class file %s", CHECK);
1295 }
1296 if (attribute_length != 2) {
1297 classfile_parse_error(
1298 "Wrong size %u for field's Signature attribute in class file %s",
1299 attribute_length, CHECK);
1300 }
1301 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1302 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1303 if (runtime_visible_annotations != NULL) {
1304 classfile_parse_error(
1305 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1306 }
1307 runtime_visible_annotations_length = attribute_length;
1308 runtime_visible_annotations = cfs->current();
1309 assert(runtime_visible_annotations != NULL, "null visible annotations");
1310 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1311 parse_annotations(cp,
1312 runtime_visible_annotations,
1313 runtime_visible_annotations_length,
1314 parsed_annotations,
1315 _loader_data,
1316 CHECK);
1317 cfs->skip_u1_fast(runtime_visible_annotations_length);
1318 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1319 if (runtime_invisible_annotations_exists) {
1320 classfile_parse_error(
1321 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1322 }
1323 runtime_invisible_annotations_exists = true;
1324 if (PreserveAllAnnotations) {
1325 runtime_invisible_annotations_length = attribute_length;
1326 runtime_invisible_annotations = cfs->current();
1327 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1328 }
1329 cfs->skip_u1(attribute_length, CHECK);
1330 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1331 if (runtime_visible_type_annotations != NULL) {
1332 classfile_parse_error(
1333 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1334 }
1335 runtime_visible_type_annotations_length = attribute_length;
1336 runtime_visible_type_annotations = cfs->current();
1337 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1338 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1339 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1340 if (runtime_invisible_type_annotations_exists) {
1341 classfile_parse_error(
1342 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1343 } else {
1344 runtime_invisible_type_annotations_exists = true;
1345 }
1346 if (PreserveAllAnnotations) {
1347 runtime_invisible_type_annotations_length = attribute_length;
1348 runtime_invisible_type_annotations = cfs->current();
1349 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1350 }
1351 cfs->skip_u1(attribute_length, CHECK);
1352 } else {
1353 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1354 }
1355 } else {
1356 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1357 }
1358 }
1359
1360 *constantvalue_index_addr = constantvalue_index;
1361 *is_synthetic_addr = is_synthetic;
1362 *generic_signature_index_addr = generic_signature_index;
1363 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1364 runtime_visible_annotations_length,
1365 runtime_invisible_annotations,
1366 runtime_invisible_annotations_length,
1367 CHECK);
1368 parsed_annotations->set_field_annotations(a);
1369 a = assemble_annotations(runtime_visible_type_annotations,
1370 runtime_visible_type_annotations_length,
1371 runtime_invisible_type_annotations,
1372 runtime_invisible_type_annotations_length,
1373 CHECK);
1374 parsed_annotations->set_field_type_annotations(a);
1375 return;
1376 }
1377
1378
1379 // Field allocation types. Used for computing field offsets.
1380
1381 enum FieldAllocationType {
1382 STATIC_OOP, // Oops
1383 STATIC_BYTE, // Boolean, Byte, char
1384 STATIC_SHORT, // shorts
1385 STATIC_WORD, // ints
1386 STATIC_DOUBLE, // aligned long or double
1387 NONSTATIC_OOP,
1388 NONSTATIC_BYTE,
1389 NONSTATIC_SHORT,
1390 NONSTATIC_WORD,
1391 NONSTATIC_DOUBLE,
1392 MAX_FIELD_ALLOCATION_TYPE,
1393 BAD_ALLOCATION_TYPE = -1
1394 };
1395
1396 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1397 BAD_ALLOCATION_TYPE, // 0
1398 BAD_ALLOCATION_TYPE, // 1
1399 BAD_ALLOCATION_TYPE, // 2
1400 BAD_ALLOCATION_TYPE, // 3
1401 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1402 NONSTATIC_SHORT, // T_CHAR = 5,
1403 NONSTATIC_WORD, // T_FLOAT = 6,
1404 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1405 NONSTATIC_BYTE, // T_BYTE = 8,
1406 NONSTATIC_SHORT, // T_SHORT = 9,
1407 NONSTATIC_WORD, // T_INT = 10,
1408 NONSTATIC_DOUBLE, // T_LONG = 11,
1409 NONSTATIC_OOP, // T_OBJECT = 12,
1410 NONSTATIC_OOP, // T_ARRAY = 13,
1411 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1412 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1413 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1414 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1415 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1416 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1417 BAD_ALLOCATION_TYPE, // 0
1418 BAD_ALLOCATION_TYPE, // 1
1419 BAD_ALLOCATION_TYPE, // 2
1420 BAD_ALLOCATION_TYPE, // 3
1421 STATIC_BYTE , // T_BOOLEAN = 4,
1422 STATIC_SHORT, // T_CHAR = 5,
1423 STATIC_WORD, // T_FLOAT = 6,
1424 STATIC_DOUBLE, // T_DOUBLE = 7,
1425 STATIC_BYTE, // T_BYTE = 8,
1426 STATIC_SHORT, // T_SHORT = 9,
1427 STATIC_WORD, // T_INT = 10,
1428 STATIC_DOUBLE, // T_LONG = 11,
1429 STATIC_OOP, // T_OBJECT = 12,
1430 STATIC_OOP, // T_ARRAY = 13,
1431 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1432 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1433 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1434 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1435 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1436 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1437 };
1438
1439 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1440 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1441 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1442 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1443 return result;
1444 }
1445
1446 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1447 public:
1448 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1449
1450 FieldAllocationCount() {
1451 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1452 count[i] = 0;
1453 }
1454 }
1455
1456 FieldAllocationType update(bool is_static, BasicType type) {
1457 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1458 if (atype != BAD_ALLOCATION_TYPE) {
1459 // Make sure there is no overflow with injected fields.
1460 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1461 count[atype]++;
1462 }
1463 return atype;
1464 }
1465 };
1466
1467 // Side-effects: populates the _fields, _fields_annotations,
1468 // _fields_type_annotations fields
1469 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1470 bool is_interface,
1471 FieldAllocationCount* const fac,
1472 ConstantPool* cp,
1473 const int cp_size,
1474 u2* const java_fields_count_ptr,
1475 TRAPS) {
1476
1477 assert(cfs != NULL, "invariant");
1478 assert(fac != NULL, "invariant");
1479 assert(cp != NULL, "invariant");
1480 assert(java_fields_count_ptr != NULL, "invariant");
1481
1482 assert(NULL == _fields, "invariant");
1483 assert(NULL == _fields_annotations, "invariant");
1484 assert(NULL == _fields_type_annotations, "invariant");
1485
1486 cfs->guarantee_more(2, CHECK); // length
1487 const u2 length = cfs->get_u2_fast();
1488 *java_fields_count_ptr = length;
1489
1490 int num_injected = 0;
1491 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1492 &num_injected);
1493 const int total_fields = length + num_injected;
1494
1495 // The field array starts with tuples of shorts
1496 // [access, name index, sig index, initial value index, byte offset].
1497 // A generic signature slot only exists for field with generic
1498 // signature attribute. And the access flag is set with
1499 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1500 // signature slots are at the end of the field array and after all
1501 // other fields data.
1502 //
1503 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1504 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1505 // ...
1506 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1507 // [generic signature index]
1508 // [generic signature index]
1509 // ...
1510 //
1511 // Allocate a temporary resource array for field data. For each field,
1512 // a slot is reserved in the temporary array for the generic signature
1513 // index. After parsing all fields, the data are copied to a permanent
1514 // array and any unused slots will be discarded.
1515 ResourceMark rm(THREAD);
1516 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1517 u2,
1518 total_fields * (FieldInfo::field_slots + 1));
1519
1520 // The generic signature slots start after all other fields' data.
1521 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1522 int num_generic_signature = 0;
1523 for (int n = 0; n < length; n++) {
1524 // access_flags, name_index, descriptor_index, attributes_count
1525 cfs->guarantee_more(8, CHECK);
1526
1527 AccessFlags access_flags;
1528 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1529 verify_legal_field_modifiers(flags, is_interface, CHECK);
1530 access_flags.set_flags(flags);
1531
1532 const u2 name_index = cfs->get_u2_fast();
1533 check_property(valid_symbol_at(name_index),
1534 "Invalid constant pool index %u for field name in class file %s",
1535 name_index, CHECK);
1536 const Symbol* const name = cp->symbol_at(name_index);
1537 verify_legal_field_name(name, CHECK);
1538
1539 const u2 signature_index = cfs->get_u2_fast();
1540 check_property(valid_symbol_at(signature_index),
1541 "Invalid constant pool index %u for field signature in class file %s",
1542 signature_index, CHECK);
1543 const Symbol* const sig = cp->symbol_at(signature_index);
1544 verify_legal_field_signature(name, sig, CHECK);
1545
1546 u2 constantvalue_index = 0;
1547 bool is_synthetic = false;
1548 u2 generic_signature_index = 0;
1549 const bool is_static = access_flags.is_static();
1550 FieldAnnotationCollector parsed_annotations(_loader_data);
1551
1552 const u2 attributes_count = cfs->get_u2_fast();
1553 if (attributes_count > 0) {
1554 parse_field_attributes(cfs,
1555 attributes_count,
1556 is_static,
1557 signature_index,
1558 &constantvalue_index,
1559 &is_synthetic,
1560 &generic_signature_index,
1561 &parsed_annotations,
1562 CHECK);
1563
1564 if (parsed_annotations.field_annotations() != NULL) {
1565 if (_fields_annotations == NULL) {
1566 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1567 _loader_data, length, NULL,
1568 CHECK);
1569 }
1570 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1571 parsed_annotations.set_field_annotations(NULL);
1572 }
1573 if (parsed_annotations.field_type_annotations() != NULL) {
1574 if (_fields_type_annotations == NULL) {
1575 _fields_type_annotations =
1576 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1577 length,
1578 NULL,
1579 CHECK);
1580 }
1581 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1582 parsed_annotations.set_field_type_annotations(NULL);
1583 }
1584
1585 if (is_synthetic) {
1586 access_flags.set_is_synthetic();
1587 }
1588 if (generic_signature_index != 0) {
1589 access_flags.set_field_has_generic_signature();
1590 fa[generic_signature_slot] = generic_signature_index;
1591 generic_signature_slot ++;
1592 num_generic_signature ++;
1593 }
1594 }
1595
1596 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1597 field->initialize(access_flags.as_short(),
1598 name_index,
1599 signature_index,
1600 constantvalue_index);
1601 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1602
1603 // Remember how many oops we encountered and compute allocation type
1604 const FieldAllocationType atype = fac->update(is_static, type);
1605 field->set_allocation_type(atype);
1606
1607 // After field is initialized with type, we can augment it with aux info
1608 if (parsed_annotations.has_any_annotations())
1609 parsed_annotations.apply_to(field);
1610 }
1611
1612 int index = length;
1613 if (num_injected != 0) {
1614 for (int n = 0; n < num_injected; n++) {
1615 // Check for duplicates
1616 if (injected[n].may_be_java) {
1617 const Symbol* const name = injected[n].name();
1618 const Symbol* const signature = injected[n].signature();
1619 bool duplicate = false;
1620 for (int i = 0; i < length; i++) {
1621 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1622 if (name == cp->symbol_at(f->name_index()) &&
1623 signature == cp->symbol_at(f->signature_index())) {
1624 // Symbol is desclared in Java so skip this one
1625 duplicate = true;
1626 break;
1627 }
1628 }
1629 if (duplicate) {
1630 // These will be removed from the field array at the end
1631 continue;
1632 }
1633 }
1634
1635 // Injected field
1636 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1637 field->initialize(JVM_ACC_FIELD_INTERNAL,
1638 injected[n].name_index,
1639 injected[n].signature_index,
1640 0);
1641
1642 const BasicType type = FieldType::basic_type(injected[n].signature());
1643
1644 // Remember how many oops we encountered and compute allocation type
1645 const FieldAllocationType atype = fac->update(false, type);
1646 field->set_allocation_type(atype);
1647 index++;
1648 }
1649 }
1650
1651 assert(NULL == _fields, "invariant");
1652
1653 _fields =
1654 MetadataFactory::new_array<u2>(_loader_data,
1655 index * FieldInfo::field_slots + num_generic_signature,
1656 CHECK);
1657 // Sometimes injected fields already exist in the Java source so
1658 // the fields array could be too long. In that case the
1659 // fields array is trimed. Also unused slots that were reserved
1660 // for generic signature indexes are discarded.
1661 {
1662 int i = 0;
1663 for (; i < index * FieldInfo::field_slots; i++) {
1664 _fields->at_put(i, fa[i]);
1665 }
1666 for (int j = total_fields * FieldInfo::field_slots;
1667 j < generic_signature_slot; j++) {
1668 _fields->at_put(i++, fa[j]);
1669 }
1670 assert(_fields->length() == i, "");
1671 }
1672
1673 if (_need_verify && length > 1) {
1674 // Check duplicated fields
1675 ResourceMark rm(THREAD);
1676 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1677 THREAD, NameSigHash*, HASH_ROW_SIZE);
1678 initialize_hashtable(names_and_sigs);
1679 bool dup = false;
1680 const Symbol* name = NULL;
1681 const Symbol* sig = NULL;
1682 {
1683 debug_only(NoSafepointVerifier nsv;)
1684 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1685 name = fs.name();
1686 sig = fs.signature();
1687 // If no duplicates, add name/signature in hashtable names_and_sigs.
1688 if (!put_after_lookup(name, sig, names_and_sigs)) {
1689 dup = true;
1690 break;
1691 }
1692 }
1693 }
1694 if (dup) {
1695 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1696 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1697 }
1698 }
1699 }
1700
1701
1702 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1703 u4 code_length,
1704 u4 exception_table_length,
1705 TRAPS) {
1706 assert(cfs != NULL, "invariant");
1707
1708 const unsafe_u2* const exception_table_start = cfs->current();
1709 assert(exception_table_start != NULL, "null exception table");
1710
1711 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1712 // end_pc,
1713 // handler_pc,
1714 // catch_type_index
1715
1716 // Will check legal target after parsing code array in verifier.
1717 if (_need_verify) {
1718 for (unsigned int i = 0; i < exception_table_length; i++) {
1719 const u2 start_pc = cfs->get_u2_fast();
1720 const u2 end_pc = cfs->get_u2_fast();
1721 const u2 handler_pc = cfs->get_u2_fast();
1722 const u2 catch_type_index = cfs->get_u2_fast();
1723 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1724 "Illegal exception table range in class file %s",
1725 CHECK_NULL);
1726 guarantee_property(handler_pc < code_length,
1727 "Illegal exception table handler in class file %s",
1728 CHECK_NULL);
1729 if (catch_type_index != 0) {
1730 guarantee_property(valid_klass_reference_at(catch_type_index),
1731 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1732 }
1733 }
1734 } else {
1735 cfs->skip_u2_fast(exception_table_length * 4);
1736 }
1737 return exception_table_start;
1738 }
1739
1740 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1741 u4 code_length,
1742 CompressedLineNumberWriteStream**const write_stream,
1743 TRAPS) {
1744
1745 const ClassFileStream* const cfs = _stream;
1746 unsigned int num_entries = cfs->get_u2(CHECK);
1747
1748 // Each entry is a u2 start_pc, and a u2 line_number
1749 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1750
1751 // Verify line number attribute and table length
1752 check_property(
1753 code_attribute_length == sizeof(u2) + length_in_bytes,
1754 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1755
1756 cfs->guarantee_more(length_in_bytes, CHECK);
1757
1758 if ((*write_stream) == NULL) {
1759 if (length_in_bytes > fixed_buffer_size) {
1760 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1761 } else {
1762 (*write_stream) = new CompressedLineNumberWriteStream(
1763 _linenumbertable_buffer, fixed_buffer_size);
1764 }
1765 }
1766
1767 while (num_entries-- > 0) {
1768 const u2 bci = cfs->get_u2_fast(); // start_pc
1769 const u2 line = cfs->get_u2_fast(); // line_number
1770 guarantee_property(bci < code_length,
1771 "Invalid pc in LineNumberTable in class file %s", CHECK);
1772 (*write_stream)->write_pair(bci, line);
1773 }
1774 }
1775
1776
1777 class LVT_Hash : public AllStatic {
1778 public:
1779
1780 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1781 /*
1782 * 3-tuple start_bci/length/slot has to be unique key,
1783 * so the following comparison seems to be redundant:
1784 * && elem->name_cp_index == entry->_elem->name_cp_index
1785 */
1786 return (e0.start_bci == e1.start_bci &&
1787 e0.length == e1.length &&
1788 e0.name_cp_index == e1.name_cp_index &&
1789 e0.slot == e1.slot);
1790 }
1791
1792 static unsigned int hash(LocalVariableTableElement const& e0) {
1793 unsigned int raw_hash = e0.start_bci;
1794
1795 raw_hash = e0.length + raw_hash * 37;
1796 raw_hash = e0.name_cp_index + raw_hash * 37;
1797 raw_hash = e0.slot + raw_hash * 37;
1798
1799 return raw_hash;
1800 }
1801 };
1802
1803
1804 // Class file LocalVariableTable elements.
1805 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1806 public:
1807 u2 start_bci;
1808 u2 length;
1809 u2 name_cp_index;
1810 u2 descriptor_cp_index;
1811 u2 slot;
1812 };
1813
1814 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1815 LocalVariableTableElement* const lvt) {
1816 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1817 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1818 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1819 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1820 lvt->signature_cp_index = 0;
1821 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1822 }
1823
1824 // Function is used to parse both attributes:
1825 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1826 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1827 u4 code_length,
1828 u2 max_locals,
1829 u4 code_attribute_length,
1830 u2* const localvariable_table_length,
1831 bool isLVTT,
1832 TRAPS) {
1833 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1834 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1835 const unsigned int size =
1836 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1837
1838 const ConstantPool* const cp = _cp;
1839
1840 // Verify local variable table attribute has right length
1841 if (_need_verify) {
1842 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1843 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1844 }
1845
1846 const unsafe_u2* const localvariable_table_start = cfs->current();
1847 assert(localvariable_table_start != NULL, "null local variable table");
1848 if (!_need_verify) {
1849 cfs->skip_u2_fast(size);
1850 } else {
1851 cfs->guarantee_more(size * 2, CHECK_NULL);
1852 for(int i = 0; i < (*localvariable_table_length); i++) {
1853 const u2 start_pc = cfs->get_u2_fast();
1854 const u2 length = cfs->get_u2_fast();
1855 const u2 name_index = cfs->get_u2_fast();
1856 const u2 descriptor_index = cfs->get_u2_fast();
1857 const u2 index = cfs->get_u2_fast();
1858 // Assign to a u4 to avoid overflow
1859 const u4 end_pc = (u4)start_pc + (u4)length;
1860
1861 if (start_pc >= code_length) {
1862 classfile_parse_error(
1863 "Invalid start_pc %u in %s in class file %s",
1864 start_pc, tbl_name, CHECK_NULL);
1865 }
1866 if (end_pc > code_length) {
1867 classfile_parse_error(
1868 "Invalid length %u in %s in class file %s",
1869 length, tbl_name, CHECK_NULL);
1870 }
1871 const int cp_size = cp->length();
1872 guarantee_property(valid_symbol_at(name_index),
1873 "Name index %u in %s has bad constant type in class file %s",
1874 name_index, tbl_name, CHECK_NULL);
1875 guarantee_property(valid_symbol_at(descriptor_index),
1876 "Signature index %u in %s has bad constant type in class file %s",
1877 descriptor_index, tbl_name, CHECK_NULL);
1878
1879 const Symbol* const name = cp->symbol_at(name_index);
1880 const Symbol* const sig = cp->symbol_at(descriptor_index);
1881 verify_legal_field_name(name, CHECK_NULL);
1882 u2 extra_slot = 0;
1883 if (!isLVTT) {
1884 verify_legal_field_signature(name, sig, CHECK_NULL);
1885
1886 // 4894874: check special cases for double and long local variables
1887 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1888 sig == vmSymbols::type_signature(T_LONG)) {
1889 extra_slot = 1;
1890 }
1891 }
1892 guarantee_property((index + extra_slot) < max_locals,
1893 "Invalid index %u in %s in class file %s",
1894 index, tbl_name, CHECK_NULL);
1895 }
1896 }
1897 return localvariable_table_start;
1898 }
1899
1900
1901 void ClassFileParser::parse_type_array(u2 array_length,
1902 u4 code_length,
1903 u4* const u1_index,
1904 u4* const u2_index,
1905 u1* const u1_array,
1906 u2* const u2_array,
1907 TRAPS) {
1908 const ClassFileStream* const cfs = _stream;
1909 u2 index = 0; // index in the array with long/double occupying two slots
1910 u4 i1 = *u1_index;
1911 u4 i2 = *u2_index + 1;
1912 for(int i = 0; i < array_length; i++) {
1913 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1914 index++;
1915 if (tag == ITEM_Long || tag == ITEM_Double) {
1916 index++;
1917 } else if (tag == ITEM_Object) {
1918 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1919 guarantee_property(valid_klass_reference_at(class_index),
1920 "Bad class index %u in StackMap in class file %s",
1921 class_index, CHECK);
1922 } else if (tag == ITEM_Uninitialized) {
1923 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1924 guarantee_property(
1925 offset < code_length,
1926 "Bad uninitialized type offset %u in StackMap in class file %s",
1927 offset, CHECK);
1928 } else {
1929 guarantee_property(
1930 tag <= (u1)ITEM_Uninitialized,
1931 "Unknown variable type %u in StackMap in class file %s",
1932 tag, CHECK);
1933 }
1934 }
1935 u2_array[*u2_index] = index;
1936 *u1_index = i1;
1937 *u2_index = i2;
1938 }
1939
1940 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1941 u4 code_attribute_length,
1942 bool need_verify,
1943 TRAPS) {
1944 assert(cfs != NULL, "invariant");
1945
1946 if (0 == code_attribute_length) {
1947 return NULL;
1948 }
1949
1950 const u1* const stackmap_table_start = cfs->current();
1951 assert(stackmap_table_start != NULL, "null stackmap table");
1952
1953 // check code_attribute_length first
1954 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1955
1956 if (!need_verify && !DumpSharedSpaces) {
1957 return NULL;
1958 }
1959 return stackmap_table_start;
1960 }
1961
1962 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1963 u2* const checked_exceptions_length,
1964 u4 method_attribute_length,
1965 TRAPS) {
1966 assert(cfs != NULL, "invariant");
1967 assert(checked_exceptions_length != NULL, "invariant");
1968
1969 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1970 *checked_exceptions_length = cfs->get_u2_fast();
1971 const unsigned int size =
1972 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1973 const unsafe_u2* const checked_exceptions_start = cfs->current();
1974 assert(checked_exceptions_start != NULL, "null checked exceptions");
1975 if (!_need_verify) {
1976 cfs->skip_u2_fast(size);
1977 } else {
1978 // Verify each value in the checked exception table
1979 u2 checked_exception;
1980 const u2 len = *checked_exceptions_length;
1981 cfs->guarantee_more(2 * len, CHECK_NULL);
1982 for (int i = 0; i < len; i++) {
1983 checked_exception = cfs->get_u2_fast();
1984 check_property(
1985 valid_klass_reference_at(checked_exception),
1986 "Exception name has bad type at constant pool %u in class file %s",
1987 checked_exception, CHECK_NULL);
1988 }
1989 }
1990 // check exceptions attribute length
1991 if (_need_verify) {
1992 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1993 sizeof(u2) * size),
1994 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1995 }
1996 return checked_exceptions_start;
1997 }
1998
1999 void ClassFileParser::throwIllegalSignature(const char* type,
2000 const Symbol* name,
2001 const Symbol* sig,
2002 TRAPS) const {
2003 assert(name != NULL, "invariant");
2004 assert(sig != NULL, "invariant");
2005
2006 ResourceMark rm(THREAD);
2007 Exceptions::fthrow(THREAD_AND_LOCATION,
2008 vmSymbols::java_lang_ClassFormatError(),
2009 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2010 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2011 }
2012
2013 AnnotationCollector::ID
2014 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2015 const Symbol* name) {
2016 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2017 // Privileged code can use all annotations. Other code silently drops some.
2018 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2019 loader_data->is_platform_class_loader_data() ||
2020 loader_data->is_anonymous();
2021 switch (sid) {
2022 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2023 if (_location != _in_method) break; // only allow for methods
2024 if (!privileged) break; // only allow in privileged code
2025 return _method_CallerSensitive;
2026 }
2027 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2028 if (_location != _in_method) break; // only allow for methods
2029 if (!privileged) break; // only allow in privileged code
2030 return _method_ForceInline;
2031 }
2032 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2033 if (_location != _in_method) break; // only allow for methods
2034 if (!privileged) break; // only allow in privileged code
2035 return _method_DontInline;
2036 }
2037 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2038 if (_location != _in_method) break; // only allow for methods
2039 if (!privileged) break; // only allow in privileged code
2040 return _method_InjectedProfile;
2041 }
2042 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2043 if (_location != _in_method) break; // only allow for methods
2044 if (!privileged) break; // only allow in privileged code
2045 return _method_LambdaForm_Compiled;
2046 }
2047 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
2048 if (_location != _in_method) break; // only allow for methods
2049 if (!privileged) break; // only allow in privileged code
2050 return _method_LambdaForm_Hidden;
2051 }
2052 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2053 if (_location != _in_method) break; // only allow for methods
2054 if (!privileged) break; // only allow in privileged code
2055 return _method_HotSpotIntrinsicCandidate;
2056 }
2057 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2058 if (_location != _in_field) break; // only allow for fields
2059 if (!privileged) break; // only allow in privileged code
2060 return _field_Stable;
2061 }
2062 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2063 if (_location != _in_field && _location != _in_class) {
2064 break; // only allow for fields and classes
2065 }
2066 if (!EnableContended || (RestrictContended && !privileged)) {
2067 break; // honor privileges
2068 }
2069 return _jdk_internal_vm_annotation_Contended;
2070 }
2071 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2072 if (_location != _in_method) break; // only allow for methods
2073 if (RestrictReservedStack && !privileged) break; // honor privileges
2074 return _jdk_internal_vm_annotation_ReservedStackAccess;
2075 }
2076 default: {
2077 break;
2078 }
2079 }
2080 return AnnotationCollector::_unknown;
2081 }
2082
2083 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2084 if (is_contended())
2085 f->set_contended_group(contended_group());
2086 if (is_stable())
2087 f->set_stable(true);
2088 }
2089
2090 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2091 // If there's an error deallocate metadata for field annotations
2092 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2093 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2094 }
2095
2096 void MethodAnnotationCollector::apply_to(methodHandle m) {
2097 if (has_annotation(_method_CallerSensitive))
2098 m->set_caller_sensitive(true);
2099 if (has_annotation(_method_ForceInline))
2100 m->set_force_inline(true);
2101 if (has_annotation(_method_DontInline))
2102 m->set_dont_inline(true);
2103 if (has_annotation(_method_InjectedProfile))
2104 m->set_has_injected_profile(true);
2105 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2106 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2107 if (has_annotation(_method_LambdaForm_Hidden))
2108 m->set_hidden(true);
2109 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2110 m->set_intrinsic_candidate(true);
2111 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2112 m->set_has_reserved_stack_access(true);
2113 }
2114
2115 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2116 assert(ik != NULL, "invariant");
2117 ik->set_is_contended(is_contended());
2118 }
2119
2120 #define MAX_ARGS_SIZE 255
2121 #define MAX_CODE_SIZE 65535
2122 #define INITIAL_MAX_LVT_NUMBER 256
2123
2124 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2125 *
2126 * Rules for LVT's and LVTT's are:
2127 * - There can be any number of LVT's and LVTT's.
2128 * - If there are n LVT's, it is the same as if there was just
2129 * one LVT containing all the entries from the n LVT's.
2130 * - There may be no more than one LVT entry per local variable.
2131 * Two LVT entries are 'equal' if these fields are the same:
2132 * start_pc, length, name, slot
2133 * - There may be no more than one LVTT entry per each LVT entry.
2134 * Each LVTT entry has to match some LVT entry.
2135 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2136 */
2137 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2138 int lvt_cnt,
2139 u2* const localvariable_table_length,
2140 const unsafe_u2** const localvariable_table_start,
2141 int lvtt_cnt,
2142 u2* const localvariable_type_table_length,
2143 const unsafe_u2** const localvariable_type_table_start,
2144 TRAPS) {
2145
2146 ResourceMark rm(THREAD);
2147
2148 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2149 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2150
2151 LVT_HashTable* const table = new LVT_HashTable();
2152
2153 // To fill LocalVariableTable in
2154 const Classfile_LVT_Element* cf_lvt;
2155 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2156
2157 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2158 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2159 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2160 copy_lvt_element(&cf_lvt[idx], lvt);
2161 // If no duplicates, add LVT elem in hashtable.
2162 if (table->put(*lvt, lvt) == false
2163 && _need_verify
2164 && _major_version >= JAVA_1_5_VERSION) {
2165 classfile_parse_error("Duplicated LocalVariableTable attribute "
2166 "entry for '%s' in class file %s",
2167 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2168 CHECK);
2169 }
2170 }
2171 }
2172
2173 // To merge LocalVariableTable and LocalVariableTypeTable
2174 const Classfile_LVT_Element* cf_lvtt;
2175 LocalVariableTableElement lvtt_elem;
2176
2177 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2178 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2179 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2180 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2181 LocalVariableTableElement** entry = table->get(lvtt_elem);
2182 if (entry == NULL) {
2183 if (_need_verify) {
2184 classfile_parse_error("LVTT entry for '%s' in class file %s "
2185 "does not match any LVT entry",
2186 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2187 CHECK);
2188 }
2189 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2190 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2191 "entry for '%s' in class file %s",
2192 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2193 CHECK);
2194 } else {
2195 // to add generic signatures into LocalVariableTable
2196 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2197 }
2198 }
2199 }
2200 }
2201
2202
2203 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2204 const u1* runtime_visible_annotations,
2205 int runtime_visible_annotations_length,
2206 const u1* runtime_invisible_annotations,
2207 int runtime_invisible_annotations_length,
2208 const u1* runtime_visible_parameter_annotations,
2209 int runtime_visible_parameter_annotations_length,
2210 const u1* runtime_invisible_parameter_annotations,
2211 int runtime_invisible_parameter_annotations_length,
2212 const u1* runtime_visible_type_annotations,
2213 int runtime_visible_type_annotations_length,
2214 const u1* runtime_invisible_type_annotations,
2215 int runtime_invisible_type_annotations_length,
2216 const u1* annotation_default,
2217 int annotation_default_length,
2218 TRAPS) {
2219
2220 AnnotationArray* a;
2221
2222 if (runtime_visible_annotations_length +
2223 runtime_invisible_annotations_length > 0) {
2224 a = assemble_annotations(runtime_visible_annotations,
2225 runtime_visible_annotations_length,
2226 runtime_invisible_annotations,
2227 runtime_invisible_annotations_length,
2228 CHECK);
2229 cm->set_method_annotations(a);
2230 }
2231
2232 if (runtime_visible_parameter_annotations_length +
2233 runtime_invisible_parameter_annotations_length > 0) {
2234 a = assemble_annotations(runtime_visible_parameter_annotations,
2235 runtime_visible_parameter_annotations_length,
2236 runtime_invisible_parameter_annotations,
2237 runtime_invisible_parameter_annotations_length,
2238 CHECK);
2239 cm->set_parameter_annotations(a);
2240 }
2241
2242 if (annotation_default_length > 0) {
2243 a = assemble_annotations(annotation_default,
2244 annotation_default_length,
2245 NULL,
2246 0,
2247 CHECK);
2248 cm->set_default_annotations(a);
2249 }
2250
2251 if (runtime_visible_type_annotations_length +
2252 runtime_invisible_type_annotations_length > 0) {
2253 a = assemble_annotations(runtime_visible_type_annotations,
2254 runtime_visible_type_annotations_length,
2255 runtime_invisible_type_annotations,
2256 runtime_invisible_type_annotations_length,
2257 CHECK);
2258 cm->set_type_annotations(a);
2259 }
2260 }
2261
2262
2263 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2264 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2265 // Method* to save footprint, so we only know the size of the resulting Method* when the
2266 // entire method attribute is parsed.
2267 //
2268 // The promoted_flags parameter is used to pass relevant access_flags
2269 // from the method back up to the containing klass. These flag values
2270 // are added to klass's access_flags.
2271
2272 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2273 bool is_interface,
2274 const ConstantPool* cp,
2275 AccessFlags* const promoted_flags,
2276 TRAPS) {
2277 assert(cfs != NULL, "invariant");
2278 assert(cp != NULL, "invariant");
2279 assert(promoted_flags != NULL, "invariant");
2280
2281 ResourceMark rm(THREAD);
2282 // Parse fixed parts:
2283 // access_flags, name_index, descriptor_index, attributes_count
2284 cfs->guarantee_more(8, CHECK_NULL);
2285
2286 int flags = cfs->get_u2_fast();
2287 const u2 name_index = cfs->get_u2_fast();
2288 const int cp_size = cp->length();
2289 check_property(
2290 valid_symbol_at(name_index),
2291 "Illegal constant pool index %u for method name in class file %s",
2292 name_index, CHECK_NULL);
2293 const Symbol* const name = cp->symbol_at(name_index);
2294 verify_legal_method_name(name, CHECK_NULL);
2295
2296 const u2 signature_index = cfs->get_u2_fast();
2297 guarantee_property(
2298 valid_symbol_at(signature_index),
2299 "Illegal constant pool index %u for method signature in class file %s",
2300 signature_index, CHECK_NULL);
2301 const Symbol* const signature = cp->symbol_at(signature_index);
2302
2303 if (name == vmSymbols::class_initializer_name()) {
2304 // We ignore the other access flags for a valid class initializer.
2305 // (JVM Spec 2nd ed., chapter 4.6)
2306 if (_major_version < 51) { // backward compatibility
2307 flags = JVM_ACC_STATIC;
2308 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2309 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2310 } else {
2311 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2312 }
2313 } else {
2314 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2315 }
2316
2317 if (name == vmSymbols::object_initializer_name() && is_interface) {
2318 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2319 }
2320
2321 int args_size = -1; // only used when _need_verify is true
2322 if (_need_verify) {
2323 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2324 verify_legal_method_signature(name, signature, CHECK_NULL);
2325 if (args_size > MAX_ARGS_SIZE) {
2326 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2327 }
2328 }
2329
2330 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2331
2332 // Default values for code and exceptions attribute elements
2333 u2 max_stack = 0;
2334 u2 max_locals = 0;
2335 u4 code_length = 0;
2336 const u1* code_start = 0;
2337 u2 exception_table_length = 0;
2338 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2339 Array<int>* exception_handlers = Universe::the_empty_int_array();
2340 u2 checked_exceptions_length = 0;
2341 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2342 CompressedLineNumberWriteStream* linenumber_table = NULL;
2343 int linenumber_table_length = 0;
2344 int total_lvt_length = 0;
2345 u2 lvt_cnt = 0;
2346 u2 lvtt_cnt = 0;
2347 bool lvt_allocated = false;
2348 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2349 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2350 u2* localvariable_table_length = NULL;
2351 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2352 u2* localvariable_type_table_length = NULL;
2353 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2354 int method_parameters_length = -1;
2355 const u1* method_parameters_data = NULL;
2356 bool method_parameters_seen = false;
2357 bool parsed_code_attribute = false;
2358 bool parsed_checked_exceptions_attribute = false;
2359 bool parsed_stackmap_attribute = false;
2360 // stackmap attribute - JDK1.5
2361 const u1* stackmap_data = NULL;
2362 int stackmap_data_length = 0;
2363 u2 generic_signature_index = 0;
2364 MethodAnnotationCollector parsed_annotations;
2365 const u1* runtime_visible_annotations = NULL;
2366 int runtime_visible_annotations_length = 0;
2367 const u1* runtime_invisible_annotations = NULL;
2368 int runtime_invisible_annotations_length = 0;
2369 const u1* runtime_visible_parameter_annotations = NULL;
2370 int runtime_visible_parameter_annotations_length = 0;
2371 const u1* runtime_invisible_parameter_annotations = NULL;
2372 int runtime_invisible_parameter_annotations_length = 0;
2373 const u1* runtime_visible_type_annotations = NULL;
2374 int runtime_visible_type_annotations_length = 0;
2375 const u1* runtime_invisible_type_annotations = NULL;
2376 int runtime_invisible_type_annotations_length = 0;
2377 bool runtime_invisible_annotations_exists = false;
2378 bool runtime_invisible_type_annotations_exists = false;
2379 bool runtime_invisible_parameter_annotations_exists = false;
2380 const u1* annotation_default = NULL;
2381 int annotation_default_length = 0;
2382
2383 // Parse code and exceptions attribute
2384 u2 method_attributes_count = cfs->get_u2_fast();
2385 while (method_attributes_count--) {
2386 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2387 const u2 method_attribute_name_index = cfs->get_u2_fast();
2388 const u4 method_attribute_length = cfs->get_u4_fast();
2389 check_property(
2390 valid_symbol_at(method_attribute_name_index),
2391 "Invalid method attribute name index %u in class file %s",
2392 method_attribute_name_index, CHECK_NULL);
2393
2394 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2395 if (method_attribute_name == vmSymbols::tag_code()) {
2396 // Parse Code attribute
2397 if (_need_verify) {
2398 guarantee_property(
2399 !access_flags.is_native() && !access_flags.is_abstract(),
2400 "Code attribute in native or abstract methods in class file %s",
2401 CHECK_NULL);
2402 }
2403 if (parsed_code_attribute) {
2404 classfile_parse_error("Multiple Code attributes in class file %s",
2405 CHECK_NULL);
2406 }
2407 parsed_code_attribute = true;
2408
2409 // Stack size, locals size, and code size
2410 if (_major_version == 45 && _minor_version <= 2) {
2411 cfs->guarantee_more(4, CHECK_NULL);
2412 max_stack = cfs->get_u1_fast();
2413 max_locals = cfs->get_u1_fast();
2414 code_length = cfs->get_u2_fast();
2415 } else {
2416 cfs->guarantee_more(8, CHECK_NULL);
2417 max_stack = cfs->get_u2_fast();
2418 max_locals = cfs->get_u2_fast();
2419 code_length = cfs->get_u4_fast();
2420 }
2421 if (_need_verify) {
2422 guarantee_property(args_size <= max_locals,
2423 "Arguments can't fit into locals in class file %s",
2424 CHECK_NULL);
2425 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2426 "Invalid method Code length %u in class file %s",
2427 code_length, CHECK_NULL);
2428 }
2429 // Code pointer
2430 code_start = cfs->current();
2431 assert(code_start != NULL, "null code start");
2432 cfs->guarantee_more(code_length, CHECK_NULL);
2433 cfs->skip_u1_fast(code_length);
2434
2435 // Exception handler table
2436 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2437 exception_table_length = cfs->get_u2_fast();
2438 if (exception_table_length > 0) {
2439 exception_table_start = parse_exception_table(cfs,
2440 code_length,
2441 exception_table_length,
2442 CHECK_NULL);
2443 }
2444
2445 // Parse additional attributes in code attribute
2446 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2447 u2 code_attributes_count = cfs->get_u2_fast();
2448
2449 unsigned int calculated_attribute_length = 0;
2450
2451 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2452 calculated_attribute_length =
2453 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2454 } else {
2455 // max_stack, locals and length are smaller in pre-version 45.2 classes
2456 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2457 }
2458 calculated_attribute_length +=
2459 code_length +
2460 sizeof(exception_table_length) +
2461 sizeof(code_attributes_count) +
2462 exception_table_length *
2463 ( sizeof(u2) + // start_pc
2464 sizeof(u2) + // end_pc
2465 sizeof(u2) + // handler_pc
2466 sizeof(u2) ); // catch_type_index
2467
2468 while (code_attributes_count--) {
2469 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2470 const u2 code_attribute_name_index = cfs->get_u2_fast();
2471 const u4 code_attribute_length = cfs->get_u4_fast();
2472 calculated_attribute_length += code_attribute_length +
2473 sizeof(code_attribute_name_index) +
2474 sizeof(code_attribute_length);
2475 check_property(valid_symbol_at(code_attribute_name_index),
2476 "Invalid code attribute name index %u in class file %s",
2477 code_attribute_name_index,
2478 CHECK_NULL);
2479 if (LoadLineNumberTables &&
2480 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2481 // Parse and compress line number table
2482 parse_linenumber_table(code_attribute_length,
2483 code_length,
2484 &linenumber_table,
2485 CHECK_NULL);
2486
2487 } else if (LoadLocalVariableTables &&
2488 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2489 // Parse local variable table
2490 if (!lvt_allocated) {
2491 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2492 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2493 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2494 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2495 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2496 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2497 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2498 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2499 lvt_allocated = true;
2500 }
2501 if (lvt_cnt == max_lvt_cnt) {
2502 max_lvt_cnt <<= 1;
2503 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2504 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2505 }
2506 localvariable_table_start[lvt_cnt] =
2507 parse_localvariable_table(cfs,
2508 code_length,
2509 max_locals,
2510 code_attribute_length,
2511 &localvariable_table_length[lvt_cnt],
2512 false, // is not LVTT
2513 CHECK_NULL);
2514 total_lvt_length += localvariable_table_length[lvt_cnt];
2515 lvt_cnt++;
2516 } else if (LoadLocalVariableTypeTables &&
2517 _major_version >= JAVA_1_5_VERSION &&
2518 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2519 if (!lvt_allocated) {
2520 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2521 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2522 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2523 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2524 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2525 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2526 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2527 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2528 lvt_allocated = true;
2529 }
2530 // Parse local variable type table
2531 if (lvtt_cnt == max_lvtt_cnt) {
2532 max_lvtt_cnt <<= 1;
2533 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2534 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2535 }
2536 localvariable_type_table_start[lvtt_cnt] =
2537 parse_localvariable_table(cfs,
2538 code_length,
2539 max_locals,
2540 code_attribute_length,
2541 &localvariable_type_table_length[lvtt_cnt],
2542 true, // is LVTT
2543 CHECK_NULL);
2544 lvtt_cnt++;
2545 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2546 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2547 // Stack map is only needed by the new verifier in JDK1.5.
2548 if (parsed_stackmap_attribute) {
2549 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2550 }
2551 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2552 stackmap_data_length = code_attribute_length;
2553 parsed_stackmap_attribute = true;
2554 } else {
2555 // Skip unknown attributes
2556 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2557 }
2558 }
2559 // check method attribute length
2560 if (_need_verify) {
2561 guarantee_property(method_attribute_length == calculated_attribute_length,
2562 "Code segment has wrong length in class file %s",
2563 CHECK_NULL);
2564 }
2565 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2566 // Parse Exceptions attribute
2567 if (parsed_checked_exceptions_attribute) {
2568 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2569 CHECK_NULL);
2570 }
2571 parsed_checked_exceptions_attribute = true;
2572 checked_exceptions_start =
2573 parse_checked_exceptions(cfs,
2574 &checked_exceptions_length,
2575 method_attribute_length,
2576 CHECK_NULL);
2577 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2578 // reject multiple method parameters
2579 if (method_parameters_seen) {
2580 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2581 CHECK_NULL);
2582 }
2583 method_parameters_seen = true;
2584 method_parameters_length = cfs->get_u1_fast();
2585 const u2 real_length = (method_parameters_length * 4u) + 1u;
2586 if (method_attribute_length != real_length) {
2587 classfile_parse_error(
2588 "Invalid MethodParameters method attribute length %u in class file",
2589 method_attribute_length, CHECK_NULL);
2590 }
2591 method_parameters_data = cfs->current();
2592 cfs->skip_u2_fast(method_parameters_length);
2593 cfs->skip_u2_fast(method_parameters_length);
2594 // ignore this attribute if it cannot be reflected
2595 if (!SystemDictionary::Parameter_klass_loaded())
2596 method_parameters_length = -1;
2597 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2598 if (method_attribute_length != 0) {
2599 classfile_parse_error(
2600 "Invalid Synthetic method attribute length %u in class file %s",
2601 method_attribute_length, CHECK_NULL);
2602 }
2603 // Should we check that there hasn't already been a synthetic attribute?
2604 access_flags.set_is_synthetic();
2605 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2606 if (method_attribute_length != 0) {
2607 classfile_parse_error(
2608 "Invalid Deprecated method attribute length %u in class file %s",
2609 method_attribute_length, CHECK_NULL);
2610 }
2611 } else if (_major_version >= JAVA_1_5_VERSION) {
2612 if (method_attribute_name == vmSymbols::tag_signature()) {
2613 if (generic_signature_index != 0) {
2614 classfile_parse_error(
2615 "Multiple Signature attributes for method in class file %s",
2616 CHECK_NULL);
2617 }
2618 if (method_attribute_length != 2) {
2619 classfile_parse_error(
2620 "Invalid Signature attribute length %u in class file %s",
2621 method_attribute_length, CHECK_NULL);
2622 }
2623 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2624 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2625 if (runtime_visible_annotations != NULL) {
2626 classfile_parse_error(
2627 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2628 CHECK_NULL);
2629 }
2630 runtime_visible_annotations_length = method_attribute_length;
2631 runtime_visible_annotations = cfs->current();
2632 assert(runtime_visible_annotations != NULL, "null visible annotations");
2633 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2634 parse_annotations(cp,
2635 runtime_visible_annotations,
2636 runtime_visible_annotations_length,
2637 &parsed_annotations,
2638 _loader_data,
2639 CHECK_NULL);
2640 cfs->skip_u1_fast(runtime_visible_annotations_length);
2641 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2642 if (runtime_invisible_annotations_exists) {
2643 classfile_parse_error(
2644 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2645 CHECK_NULL);
2646 }
2647 runtime_invisible_annotations_exists = true;
2648 if (PreserveAllAnnotations) {
2649 runtime_invisible_annotations_length = method_attribute_length;
2650 runtime_invisible_annotations = cfs->current();
2651 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2652 }
2653 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2654 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2655 if (runtime_visible_parameter_annotations != NULL) {
2656 classfile_parse_error(
2657 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2658 CHECK_NULL);
2659 }
2660 runtime_visible_parameter_annotations_length = method_attribute_length;
2661 runtime_visible_parameter_annotations = cfs->current();
2662 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2663 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2664 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2665 if (runtime_invisible_parameter_annotations_exists) {
2666 classfile_parse_error(
2667 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2668 CHECK_NULL);
2669 }
2670 runtime_invisible_parameter_annotations_exists = true;
2671 if (PreserveAllAnnotations) {
2672 runtime_invisible_parameter_annotations_length = method_attribute_length;
2673 runtime_invisible_parameter_annotations = cfs->current();
2674 assert(runtime_invisible_parameter_annotations != NULL,
2675 "null invisible parameter annotations");
2676 }
2677 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2678 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2679 if (annotation_default != NULL) {
2680 classfile_parse_error(
2681 "Multiple AnnotationDefault attributes for method in class file %s",
2682 CHECK_NULL);
2683 }
2684 annotation_default_length = method_attribute_length;
2685 annotation_default = cfs->current();
2686 assert(annotation_default != NULL, "null annotation default");
2687 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2688 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2689 if (runtime_visible_type_annotations != NULL) {
2690 classfile_parse_error(
2691 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2692 CHECK_NULL);
2693 }
2694 runtime_visible_type_annotations_length = method_attribute_length;
2695 runtime_visible_type_annotations = cfs->current();
2696 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2697 // No need for the VM to parse Type annotations
2698 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2699 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2700 if (runtime_invisible_type_annotations_exists) {
2701 classfile_parse_error(
2702 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2703 CHECK_NULL);
2704 } else {
2705 runtime_invisible_type_annotations_exists = true;
2706 }
2707 if (PreserveAllAnnotations) {
2708 runtime_invisible_type_annotations_length = method_attribute_length;
2709 runtime_invisible_type_annotations = cfs->current();
2710 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2711 }
2712 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2713 } else {
2714 // Skip unknown attributes
2715 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2716 }
2717 } else {
2718 // Skip unknown attributes
2719 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2720 }
2721 }
2722
2723 if (linenumber_table != NULL) {
2724 linenumber_table->write_terminator();
2725 linenumber_table_length = linenumber_table->position();
2726 }
2727
2728 // Make sure there's at least one Code attribute in non-native/non-abstract method
2729 if (_need_verify) {
2730 guarantee_property(access_flags.is_native() ||
2731 access_flags.is_abstract() ||
2732 parsed_code_attribute,
2733 "Absent Code attribute in method that is not native or abstract in class file %s",
2734 CHECK_NULL);
2735 }
2736
2737 // All sizing information for a Method* is finally available, now create it
2738 InlineTableSizes sizes(
2739 total_lvt_length,
2740 linenumber_table_length,
2741 exception_table_length,
2742 checked_exceptions_length,
2743 method_parameters_length,
2744 generic_signature_index,
2745 runtime_visible_annotations_length +
2746 runtime_invisible_annotations_length,
2747 runtime_visible_parameter_annotations_length +
2748 runtime_invisible_parameter_annotations_length,
2749 runtime_visible_type_annotations_length +
2750 runtime_invisible_type_annotations_length,
2751 annotation_default_length,
2752 0);
2753
2754 Method* const m = Method::allocate(_loader_data,
2755 code_length,
2756 access_flags,
2757 &sizes,
2758 ConstMethod::NORMAL,
2759 CHECK_NULL);
2760
2761 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2762
2763 // Fill in information from fixed part (access_flags already set)
2764 m->set_constants(_cp);
2765 m->set_name_index(name_index);
2766 m->set_signature_index(signature_index);
2767
2768 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2769 m->constMethod()->set_result_type(rtf.type());
2770
2771 if (args_size >= 0) {
2772 m->set_size_of_parameters(args_size);
2773 } else {
2774 m->compute_size_of_parameters(THREAD);
2775 }
2776 #ifdef ASSERT
2777 if (args_size >= 0) {
2778 m->compute_size_of_parameters(THREAD);
2779 assert(args_size == m->size_of_parameters(), "");
2780 }
2781 #endif
2782
2783 // Fill in code attribute information
2784 m->set_max_stack(max_stack);
2785 m->set_max_locals(max_locals);
2786 if (stackmap_data != NULL) {
2787 m->constMethod()->copy_stackmap_data(_loader_data,
2788 (u1*)stackmap_data,
2789 stackmap_data_length,
2790 CHECK_NULL);
2791 }
2792
2793 // Copy byte codes
2794 m->set_code((u1*)code_start);
2795
2796 // Copy line number table
2797 if (linenumber_table != NULL) {
2798 memcpy(m->compressed_linenumber_table(),
2799 linenumber_table->buffer(),
2800 linenumber_table_length);
2801 }
2802
2803 // Copy exception table
2804 if (exception_table_length > 0) {
2805 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2806 m->exception_table_start(),
2807 exception_table_length * sizeof(ExceptionTableElement),
2808 sizeof(u2));
2809 }
2810
2811 // Copy method parameters
2812 if (method_parameters_length > 0) {
2813 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2814 for (int i = 0; i < method_parameters_length; i++) {
2815 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2816 method_parameters_data += 2;
2817 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2818 method_parameters_data += 2;
2819 }
2820 }
2821
2822 // Copy checked exceptions
2823 if (checked_exceptions_length > 0) {
2824 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2825 m->checked_exceptions_start(),
2826 checked_exceptions_length * sizeof(CheckedExceptionElement),
2827 sizeof(u2));
2828 }
2829
2830 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2831 if (total_lvt_length > 0) {
2832 promoted_flags->set_has_localvariable_table();
2833 copy_localvariable_table(m->constMethod(),
2834 lvt_cnt,
2835 localvariable_table_length,
2836 localvariable_table_start,
2837 lvtt_cnt,
2838 localvariable_type_table_length,
2839 localvariable_type_table_start,
2840 CHECK_NULL);
2841 }
2842
2843 if (parsed_annotations.has_any_annotations())
2844 parsed_annotations.apply_to(m);
2845
2846 // Copy annotations
2847 copy_method_annotations(m->constMethod(),
2848 runtime_visible_annotations,
2849 runtime_visible_annotations_length,
2850 runtime_invisible_annotations,
2851 runtime_invisible_annotations_length,
2852 runtime_visible_parameter_annotations,
2853 runtime_visible_parameter_annotations_length,
2854 runtime_invisible_parameter_annotations,
2855 runtime_invisible_parameter_annotations_length,
2856 runtime_visible_type_annotations,
2857 runtime_visible_type_annotations_length,
2858 runtime_invisible_type_annotations,
2859 runtime_invisible_type_annotations_length,
2860 annotation_default,
2861 annotation_default_length,
2862 CHECK_NULL);
2863
2864 if (name == vmSymbols::finalize_method_name() &&
2865 signature == vmSymbols::void_method_signature()) {
2866 if (m->is_empty_method()) {
2867 _has_empty_finalizer = true;
2868 } else {
2869 _has_finalizer = true;
2870 }
2871 }
2872 if (name == vmSymbols::object_initializer_name() &&
2873 signature == vmSymbols::void_method_signature() &&
2874 m->is_vanilla_constructor()) {
2875 _has_vanilla_constructor = true;
2876 }
2877
2878 NOT_PRODUCT(m->verify());
2879 return m;
2880 }
2881
2882
2883 // The promoted_flags parameter is used to pass relevant access_flags
2884 // from the methods back up to the containing klass. These flag values
2885 // are added to klass's access_flags.
2886 // Side-effects: populates the _methods field in the parser
2887 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2888 bool is_interface,
2889 AccessFlags* promoted_flags,
2890 bool* has_final_method,
2891 bool* declares_nonstatic_concrete_methods,
2892 TRAPS) {
2893 assert(cfs != NULL, "invariant");
2894 assert(promoted_flags != NULL, "invariant");
2895 assert(has_final_method != NULL, "invariant");
2896 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2897
2898 assert(NULL == _methods, "invariant");
2899
2900 cfs->guarantee_more(2, CHECK); // length
2901 const u2 length = cfs->get_u2_fast();
2902 if (length == 0) {
2903 _methods = Universe::the_empty_method_array();
2904 } else {
2905 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2906 length,
2907 NULL,
2908 CHECK);
2909
2910 for (int index = 0; index < length; index++) {
2911 Method* method = parse_method(cfs,
2912 is_interface,
2913 _cp,
2914 promoted_flags,
2915 CHECK);
2916
2917 if (method->is_final()) {
2918 *has_final_method = true;
2919 }
2920 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2921 // used for interface initialization, and default method inheritance analysis
2922 if (is_interface && !(*declares_nonstatic_concrete_methods)
2923 && !method->is_abstract() && !method->is_static()) {
2924 *declares_nonstatic_concrete_methods = true;
2925 }
2926 _methods->at_put(index, method);
2927 }
2928
2929 if (_need_verify && length > 1) {
2930 // Check duplicated methods
2931 ResourceMark rm(THREAD);
2932 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2933 THREAD, NameSigHash*, HASH_ROW_SIZE);
2934 initialize_hashtable(names_and_sigs);
2935 bool dup = false;
2936 const Symbol* name = NULL;
2937 const Symbol* sig = NULL;
2938 {
2939 debug_only(NoSafepointVerifier nsv;)
2940 for (int i = 0; i < length; i++) {
2941 const Method* const m = _methods->at(i);
2942 name = m->name();
2943 sig = m->signature();
2944 // If no duplicates, add name/signature in hashtable names_and_sigs.
2945 if (!put_after_lookup(name, sig, names_and_sigs)) {
2946 dup = true;
2947 break;
2948 }
2949 }
2950 }
2951 if (dup) {
2952 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2953 name->as_C_string(), sig->as_klass_external_name(), CHECK);
2954 }
2955 }
2956 }
2957 }
2958
2959 static const intArray* sort_methods(Array<Method*>* methods) {
2960 const int length = methods->length();
2961 // If JVMTI original method ordering or sharing is enabled we have to
2962 // remember the original class file ordering.
2963 // We temporarily use the vtable_index field in the Method* to store the
2964 // class file index, so we can read in after calling qsort.
2965 // Put the method ordering in the shared archive.
2966 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2967 for (int index = 0; index < length; index++) {
2968 Method* const m = methods->at(index);
2969 assert(!m->valid_vtable_index(), "vtable index should not be set");
2970 m->set_vtable_index(index);
2971 }
2972 }
2973 // Sort method array by ascending method name (for faster lookups & vtable construction)
2974 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2975 Method::sort_methods(methods);
2976
2977 intArray* method_ordering = NULL;
2978 // If JVMTI original method ordering or sharing is enabled construct int
2979 // array remembering the original ordering
2980 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2981 method_ordering = new intArray(length, length, -1);
2982 for (int index = 0; index < length; index++) {
2983 Method* const m = methods->at(index);
2984 const int old_index = m->vtable_index();
2985 assert(old_index >= 0 && old_index < length, "invalid method index");
2986 method_ordering->at_put(index, old_index);
2987 m->set_vtable_index(Method::invalid_vtable_index);
2988 }
2989 }
2990 return method_ordering;
2991 }
2992
2993 // Parse generic_signature attribute for methods and fields
2994 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2995 TRAPS) {
2996 assert(cfs != NULL, "invariant");
2997
2998 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2999 const u2 generic_signature_index = cfs->get_u2_fast();
3000 check_property(
3001 valid_symbol_at(generic_signature_index),
3002 "Invalid Signature attribute at constant pool index %u in class file %s",
3003 generic_signature_index, CHECK_0);
3004 return generic_signature_index;
3005 }
3006
3007 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3008 TRAPS) {
3009
3010 assert(cfs != NULL, "invariant");
3011
3012 cfs->guarantee_more(2, CHECK); // sourcefile_index
3013 const u2 sourcefile_index = cfs->get_u2_fast();
3014 check_property(
3015 valid_symbol_at(sourcefile_index),
3016 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3017 sourcefile_index, CHECK);
3018 set_class_sourcefile_index(sourcefile_index);
3019 }
3020
3021 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3022 int length,
3023 TRAPS) {
3024 assert(cfs != NULL, "invariant");
3025
3026 const u1* const sde_buffer = cfs->current();
3027 assert(sde_buffer != NULL, "null sde buffer");
3028
3029 // Don't bother storing it if there is no way to retrieve it
3030 if (JvmtiExport::can_get_source_debug_extension()) {
3031 assert((length+1) > length, "Overflow checking");
3032 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3033 for (int i = 0; i < length; i++) {
3034 sde[i] = sde_buffer[i];
3035 }
3036 sde[length] = '\0';
3037 set_class_sde_buffer((const char*)sde, length);
3038 }
3039 // Got utf8 string, set stream position forward
3040 cfs->skip_u1(length, CHECK);
3041 }
3042
3043
3044 // Inner classes can be static, private or protected (classic VM does this)
3045 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3046 JVM_ACC_PRIVATE | \
3047 JVM_ACC_PROTECTED | \
3048 JVM_ACC_STATIC \
3049 )
3050
3051 // Return number of classes in the inner classes attribute table
3052 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3053 const u1* const inner_classes_attribute_start,
3054 bool parsed_enclosingmethod_attribute,
3055 u2 enclosing_method_class_index,
3056 u2 enclosing_method_method_index,
3057 TRAPS) {
3058 const u1* const current_mark = cfs->current();
3059 u2 length = 0;
3060 if (inner_classes_attribute_start != NULL) {
3061 cfs->set_current(inner_classes_attribute_start);
3062 cfs->guarantee_more(2, CHECK_0); // length
3063 length = cfs->get_u2_fast();
3064 }
3065
3066 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3067 // method data:
3068 // [inner_class_info_index,
3069 // outer_class_info_index,
3070 // inner_name_index,
3071 // inner_class_access_flags,
3072 // ...
3073 // enclosing_method_class_index,
3074 // enclosing_method_method_index]
3075 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3076 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3077 _inner_classes = inner_classes;
3078
3079 int index = 0;
3080 const int cp_size = _cp->length();
3081 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3082 for (int n = 0; n < length; n++) {
3083 // Inner class index
3084 const u2 inner_class_info_index = cfs->get_u2_fast();
3085 check_property(
3086 valid_klass_reference_at(inner_class_info_index),
3087 "inner_class_info_index %u has bad constant type in class file %s",
3088 inner_class_info_index, CHECK_0);
3089 // Outer class index
3090 const u2 outer_class_info_index = cfs->get_u2_fast();
3091 check_property(
3092 outer_class_info_index == 0 ||
3093 valid_klass_reference_at(outer_class_info_index),
3094 "outer_class_info_index %u has bad constant type in class file %s",
3095 outer_class_info_index, CHECK_0);
3096 // Inner class name
3097 const u2 inner_name_index = cfs->get_u2_fast();
3098 check_property(
3099 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3100 "inner_name_index %u has bad constant type in class file %s",
3101 inner_name_index, CHECK_0);
3102 if (_need_verify) {
3103 guarantee_property(inner_class_info_index != outer_class_info_index,
3104 "Class is both outer and inner class in class file %s", CHECK_0);
3105 }
3106 // Access flags
3107 jint flags;
3108 // JVM_ACC_MODULE is defined in JDK-9 and later.
3109 if (_major_version >= JAVA_9_VERSION) {
3110 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3111 } else {
3112 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3113 }
3114 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3115 // Set abstract bit for old class files for backward compatibility
3116 flags |= JVM_ACC_ABSTRACT;
3117 }
3118 verify_legal_class_modifiers(flags, CHECK_0);
3119 AccessFlags inner_access_flags(flags);
3120
3121 inner_classes->at_put(index++, inner_class_info_index);
3122 inner_classes->at_put(index++, outer_class_info_index);
3123 inner_classes->at_put(index++, inner_name_index);
3124 inner_classes->at_put(index++, inner_access_flags.as_short());
3125 }
3126
3127 // 4347400: make sure there's no duplicate entry in the classes array
3128 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3129 for(int i = 0; i < length * 4; i += 4) {
3130 for(int j = i + 4; j < length * 4; j += 4) {
3131 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3132 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3133 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3134 inner_classes->at(i+3) != inner_classes->at(j+3)),
3135 "Duplicate entry in InnerClasses in class file %s",
3136 CHECK_0);
3137 }
3138 }
3139 }
3140
3141 // Set EnclosingMethod class and method indexes.
3142 if (parsed_enclosingmethod_attribute) {
3143 inner_classes->at_put(index++, enclosing_method_class_index);
3144 inner_classes->at_put(index++, enclosing_method_method_index);
3145 }
3146 assert(index == size, "wrong size");
3147
3148 // Restore buffer's current position.
3149 cfs->set_current(current_mark);
3150
3151 return length;
3152 }
3153
3154 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3155 set_class_synthetic_flag(true);
3156 }
3157
3158 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3159 assert(cfs != NULL, "invariant");
3160
3161 const u2 signature_index = cfs->get_u2(CHECK);
3162 check_property(
3163 valid_symbol_at(signature_index),
3164 "Invalid constant pool index %u in Signature attribute in class file %s",
3165 signature_index, CHECK);
3166 set_class_generic_signature_index(signature_index);
3167 }
3168
3169 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3170 ConstantPool* cp,
3171 u4 attribute_byte_length,
3172 TRAPS) {
3173 assert(cfs != NULL, "invariant");
3174 assert(cp != NULL, "invariant");
3175
3176 const u1* const current_start = cfs->current();
3177
3178 guarantee_property(attribute_byte_length >= sizeof(u2),
3179 "Invalid BootstrapMethods attribute length %u in class file %s",
3180 attribute_byte_length,
3181 CHECK);
3182
3183 cfs->guarantee_more(attribute_byte_length, CHECK);
3184
3185 const int attribute_array_length = cfs->get_u2_fast();
3186
3187 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3188 "Short length on BootstrapMethods in class file %s",
3189 CHECK);
3190
3191
3192 // The attribute contains a counted array of counted tuples of shorts,
3193 // represending bootstrap specifiers:
3194 // length*{bootstrap_method_index, argument_count*{argument_index}}
3195 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3196 // operand_count = number of shorts in attr, except for leading length
3197
3198 // The attribute is copied into a short[] array.
3199 // The array begins with a series of short[2] pairs, one for each tuple.
3200 const int index_size = (attribute_array_length * 2);
3201
3202 Array<u2>* const operands =
3203 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3204
3205 // Eagerly assign operands so they will be deallocated with the constant
3206 // pool if there is an error.
3207 cp->set_operands(operands);
3208
3209 int operand_fill_index = index_size;
3210 const int cp_size = cp->length();
3211
3212 for (int n = 0; n < attribute_array_length; n++) {
3213 // Store a 32-bit offset into the header of the operand array.
3214 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3215
3216 // Read a bootstrap specifier.
3217 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3218 const u2 bootstrap_method_index = cfs->get_u2_fast();
3219 const u2 argument_count = cfs->get_u2_fast();
3220 check_property(
3221 valid_cp_range(bootstrap_method_index, cp_size) &&
3222 cp->tag_at(bootstrap_method_index).is_method_handle(),
3223 "bootstrap_method_index %u has bad constant type in class file %s",
3224 bootstrap_method_index,
3225 CHECK);
3226
3227 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3228 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3229 CHECK);
3230
3231 operands->at_put(operand_fill_index++, bootstrap_method_index);
3232 operands->at_put(operand_fill_index++, argument_count);
3233
3234 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3235 for (int j = 0; j < argument_count; j++) {
3236 const u2 argument_index = cfs->get_u2_fast();
3237 check_property(
3238 valid_cp_range(argument_index, cp_size) &&
3239 cp->tag_at(argument_index).is_loadable_constant(),
3240 "argument_index %u has bad constant type in class file %s",
3241 argument_index,
3242 CHECK);
3243 operands->at_put(operand_fill_index++, argument_index);
3244 }
3245 }
3246 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3247 "Bad length on BootstrapMethods in class file %s",
3248 CHECK);
3249 }
3250
3251 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3252 ConstantPool* cp,
3253 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3254 TRAPS) {
3255 assert(cfs != NULL, "invariant");
3256 assert(cp != NULL, "invariant");
3257 assert(parsed_annotations != NULL, "invariant");
3258
3259 // Set inner classes attribute to default sentinel
3260 _inner_classes = Universe::the_empty_short_array();
3261 cfs->guarantee_more(2, CHECK); // attributes_count
3262 u2 attributes_count = cfs->get_u2_fast();
3263 bool parsed_sourcefile_attribute = false;
3264 bool parsed_innerclasses_attribute = false;
3265 bool parsed_enclosingmethod_attribute = false;
3266 bool parsed_bootstrap_methods_attribute = false;
3267 const u1* runtime_visible_annotations = NULL;
3268 int runtime_visible_annotations_length = 0;
3269 const u1* runtime_invisible_annotations = NULL;
3270 int runtime_invisible_annotations_length = 0;
3271 const u1* runtime_visible_type_annotations = NULL;
3272 int runtime_visible_type_annotations_length = 0;
3273 const u1* runtime_invisible_type_annotations = NULL;
3274 int runtime_invisible_type_annotations_length = 0;
3275 bool runtime_invisible_type_annotations_exists = false;
3276 bool runtime_invisible_annotations_exists = false;
3277 bool parsed_source_debug_ext_annotations_exist = false;
3278 const u1* inner_classes_attribute_start = NULL;
3279 u4 inner_classes_attribute_length = 0;
3280 u2 enclosing_method_class_index = 0;
3281 u2 enclosing_method_method_index = 0;
3282 // Iterate over attributes
3283 while (attributes_count--) {
3284 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3285 const u2 attribute_name_index = cfs->get_u2_fast();
3286 const u4 attribute_length = cfs->get_u4_fast();
3287 check_property(
3288 valid_symbol_at(attribute_name_index),
3289 "Attribute name has bad constant pool index %u in class file %s",
3290 attribute_name_index, CHECK);
3291 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3292 if (tag == vmSymbols::tag_source_file()) {
3293 // Check for SourceFile tag
3294 if (_need_verify) {
3295 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3296 }
3297 if (parsed_sourcefile_attribute) {
3298 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3299 } else {
3300 parsed_sourcefile_attribute = true;
3301 }
3302 parse_classfile_sourcefile_attribute(cfs, CHECK);
3303 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3304 // Check for SourceDebugExtension tag
3305 if (parsed_source_debug_ext_annotations_exist) {
3306 classfile_parse_error(
3307 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3308 }
3309 parsed_source_debug_ext_annotations_exist = true;
3310 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3311 } else if (tag == vmSymbols::tag_inner_classes()) {
3312 // Check for InnerClasses tag
3313 if (parsed_innerclasses_attribute) {
3314 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3315 } else {
3316 parsed_innerclasses_attribute = true;
3317 }
3318 inner_classes_attribute_start = cfs->current();
3319 inner_classes_attribute_length = attribute_length;
3320 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3321 } else if (tag == vmSymbols::tag_synthetic()) {
3322 // Check for Synthetic tag
3323 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3324 if (attribute_length != 0) {
3325 classfile_parse_error(
3326 "Invalid Synthetic classfile attribute length %u in class file %s",
3327 attribute_length, CHECK);
3328 }
3329 parse_classfile_synthetic_attribute(CHECK);
3330 } else if (tag == vmSymbols::tag_deprecated()) {
3331 // Check for Deprecatd tag - 4276120
3332 if (attribute_length != 0) {
3333 classfile_parse_error(
3334 "Invalid Deprecated classfile attribute length %u in class file %s",
3335 attribute_length, CHECK);
3336 }
3337 } else if (_major_version >= JAVA_1_5_VERSION) {
3338 if (tag == vmSymbols::tag_signature()) {
3339 if (_generic_signature_index != 0) {
3340 classfile_parse_error(
3341 "Multiple Signature attributes in class file %s", CHECK);
3342 }
3343 if (attribute_length != 2) {
3344 classfile_parse_error(
3345 "Wrong Signature attribute length %u in class file %s",
3346 attribute_length, CHECK);
3347 }
3348 parse_classfile_signature_attribute(cfs, CHECK);
3349 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3350 if (runtime_visible_annotations != NULL) {
3351 classfile_parse_error(
3352 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3353 }
3354 runtime_visible_annotations_length = attribute_length;
3355 runtime_visible_annotations = cfs->current();
3356 assert(runtime_visible_annotations != NULL, "null visible annotations");
3357 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3358 parse_annotations(cp,
3359 runtime_visible_annotations,
3360 runtime_visible_annotations_length,
3361 parsed_annotations,
3362 _loader_data,
3363 CHECK);
3364 cfs->skip_u1_fast(runtime_visible_annotations_length);
3365 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3366 if (runtime_invisible_annotations_exists) {
3367 classfile_parse_error(
3368 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3369 }
3370 runtime_invisible_annotations_exists = true;
3371 if (PreserveAllAnnotations) {
3372 runtime_invisible_annotations_length = attribute_length;
3373 runtime_invisible_annotations = cfs->current();
3374 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3375 }
3376 cfs->skip_u1(attribute_length, CHECK);
3377 } else if (tag == vmSymbols::tag_enclosing_method()) {
3378 if (parsed_enclosingmethod_attribute) {
3379 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3380 } else {
3381 parsed_enclosingmethod_attribute = true;
3382 }
3383 guarantee_property(attribute_length == 4,
3384 "Wrong EnclosingMethod attribute length %u in class file %s",
3385 attribute_length, CHECK);
3386 cfs->guarantee_more(4, CHECK); // class_index, method_index
3387 enclosing_method_class_index = cfs->get_u2_fast();
3388 enclosing_method_method_index = cfs->get_u2_fast();
3389 if (enclosing_method_class_index == 0) {
3390 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3391 }
3392 // Validate the constant pool indices and types
3393 check_property(valid_klass_reference_at(enclosing_method_class_index),
3394 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3395 if (enclosing_method_method_index != 0 &&
3396 (!cp->is_within_bounds(enclosing_method_method_index) ||
3397 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3398 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3399 }
3400 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3401 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3402 if (parsed_bootstrap_methods_attribute) {
3403 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3404 }
3405 parsed_bootstrap_methods_attribute = true;
3406 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3407 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3408 if (runtime_visible_type_annotations != NULL) {
3409 classfile_parse_error(
3410 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3411 }
3412 runtime_visible_type_annotations_length = attribute_length;
3413 runtime_visible_type_annotations = cfs->current();
3414 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3415 // No need for the VM to parse Type annotations
3416 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3417 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3418 if (runtime_invisible_type_annotations_exists) {
3419 classfile_parse_error(
3420 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3421 } else {
3422 runtime_invisible_type_annotations_exists = true;
3423 }
3424 if (PreserveAllAnnotations) {
3425 runtime_invisible_type_annotations_length = attribute_length;
3426 runtime_invisible_type_annotations = cfs->current();
3427 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3428 }
3429 cfs->skip_u1(attribute_length, CHECK);
3430 } else {
3431 // Unknown attribute
3432 cfs->skip_u1(attribute_length, CHECK);
3433 }
3434 } else {
3435 // Unknown attribute
3436 cfs->skip_u1(attribute_length, CHECK);
3437 }
3438 }
3439 _annotations = assemble_annotations(runtime_visible_annotations,
3440 runtime_visible_annotations_length,
3441 runtime_invisible_annotations,
3442 runtime_invisible_annotations_length,
3443 CHECK);
3444 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3445 runtime_visible_type_annotations_length,
3446 runtime_invisible_type_annotations,
3447 runtime_invisible_type_annotations_length,
3448 CHECK);
3449
3450 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3451 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3452 cfs,
3453 inner_classes_attribute_start,
3454 parsed_innerclasses_attribute,
3455 enclosing_method_class_index,
3456 enclosing_method_method_index,
3457 CHECK);
3458 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3459 guarantee_property(
3460 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3461 "Wrong InnerClasses attribute length in class file %s", CHECK);
3462 }
3463 }
3464
3465 if (_max_bootstrap_specifier_index >= 0) {
3466 guarantee_property(parsed_bootstrap_methods_attribute,
3467 "Missing BootstrapMethods attribute in class file %s", CHECK);
3468 }
3469 }
3470
3471 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3472 assert(k != NULL, "invariant");
3473
3474 if (_synthetic_flag)
3475 k->set_is_synthetic();
3476 if (_sourcefile_index != 0) {
3477 k->set_source_file_name_index(_sourcefile_index);
3478 }
3479 if (_generic_signature_index != 0) {
3480 k->set_generic_signature_index(_generic_signature_index);
3481 }
3482 if (_sde_buffer != NULL) {
3483 k->set_source_debug_extension(_sde_buffer, _sde_length);
3484 }
3485 }
3486
3487 // Create the Annotations object that will
3488 // hold the annotations array for the Klass.
3489 void ClassFileParser::create_combined_annotations(TRAPS) {
3490 if (_annotations == NULL &&
3491 _type_annotations == NULL &&
3492 _fields_annotations == NULL &&
3493 _fields_type_annotations == NULL) {
3494 // Don't create the Annotations object unnecessarily.
3495 return;
3496 }
3497
3498 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3499 annotations->set_class_annotations(_annotations);
3500 annotations->set_class_type_annotations(_type_annotations);
3501 annotations->set_fields_annotations(_fields_annotations);
3502 annotations->set_fields_type_annotations(_fields_type_annotations);
3503
3504 // This is the Annotations object that will be
3505 // assigned to InstanceKlass being constructed.
3506 _combined_annotations = annotations;
3507
3508 // The annotations arrays below has been transfered the
3509 // _combined_annotations so these fields can now be cleared.
3510 _annotations = NULL;
3511 _type_annotations = NULL;
3512 _fields_annotations = NULL;
3513 _fields_type_annotations = NULL;
3514 }
3515
3516 // Transfer ownership of metadata allocated to the InstanceKlass.
3517 void ClassFileParser::apply_parsed_class_metadata(
3518 InstanceKlass* this_klass,
3519 int java_fields_count, TRAPS) {
3520 assert(this_klass != NULL, "invariant");
3521
3522 _cp->set_pool_holder(this_klass);
3523 this_klass->set_constants(_cp);
3524 this_klass->set_fields(_fields, java_fields_count);
3525 this_klass->set_methods(_methods);
3526 this_klass->set_inner_classes(_inner_classes);
3527 this_klass->set_local_interfaces(_local_interfaces);
3528 this_klass->set_transitive_interfaces(_transitive_interfaces);
3529 this_klass->set_annotations(_combined_annotations);
3530
3531 // Clear out these fields so they don't get deallocated by the destructor
3532 clear_class_metadata();
3533 }
3534
3535 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3536 int runtime_visible_annotations_length,
3537 const u1* const runtime_invisible_annotations,
3538 int runtime_invisible_annotations_length,
3539 TRAPS) {
3540 AnnotationArray* annotations = NULL;
3541 if (runtime_visible_annotations != NULL ||
3542 runtime_invisible_annotations != NULL) {
3543 annotations = MetadataFactory::new_array<u1>(_loader_data,
3544 runtime_visible_annotations_length +
3545 runtime_invisible_annotations_length,
3546 CHECK_(annotations));
3547 if (runtime_visible_annotations != NULL) {
3548 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3549 annotations->at_put(i, runtime_visible_annotations[i]);
3550 }
3551 }
3552 if (runtime_invisible_annotations != NULL) {
3553 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3554 int append = runtime_visible_annotations_length+i;
3555 annotations->at_put(append, runtime_invisible_annotations[i]);
3556 }
3557 }
3558 }
3559 return annotations;
3560 }
3561
3562 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3563 const int super_class_index,
3564 const bool need_verify,
3565 TRAPS) {
3566 assert(cp != NULL, "invariant");
3567 const InstanceKlass* super_klass = NULL;
3568
3569 if (super_class_index == 0) {
3570 check_property(_class_name == vmSymbols::java_lang_Object(),
3571 "Invalid superclass index %u in class file %s",
3572 super_class_index,
3573 CHECK_NULL);
3574 } else {
3575 check_property(valid_klass_reference_at(super_class_index),
3576 "Invalid superclass index %u in class file %s",
3577 super_class_index,
3578 CHECK_NULL);
3579 // The class name should be legal because it is checked when parsing constant pool.
3580 // However, make sure it is not an array type.
3581 bool is_array = false;
3582 if (cp->tag_at(super_class_index).is_klass()) {
3583 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3584 if (need_verify)
3585 is_array = super_klass->is_array_klass();
3586 } else if (need_verify) {
3587 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3588 }
3589 if (need_verify) {
3590 guarantee_property(!is_array,
3591 "Bad superclass name in class file %s", CHECK_NULL);
3592 }
3593 }
3594 return super_klass;
3595 }
3596
3597 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3598 unsigned int nonstatic_oop_map_count,
3599 int first_nonstatic_oop_offset) {
3600
3601 unsigned int map_count =
3602 NULL == super ? 0 : super->nonstatic_oop_map_count();
3603 if (nonstatic_oop_map_count > 0) {
3604 // We have oops to add to map
3605 if (map_count == 0) {
3606 map_count = nonstatic_oop_map_count;
3607 }
3608 else {
3609 // Check whether we should add a new map block or whether the last one can
3610 // be extended
3611 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3612 const OopMapBlock* const last_map = first_map + map_count - 1;
3613
3614 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3615 if (next_offset == first_nonstatic_oop_offset) {
3616 // There is no gap bettwen superklass's last oop field and first
3617 // local oop field, merge maps.
3618 nonstatic_oop_map_count -= 1;
3619 }
3620 else {
3621 // Superklass didn't end with a oop field, add extra maps
3622 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3623 }
3624 map_count += nonstatic_oop_map_count;
3625 }
3626 }
3627 return map_count;
3628 }
3629
3630 #ifndef PRODUCT
3631 static void print_field_layout(const Symbol* name,
3632 Array<u2>* fields,
3633 constantPoolHandle cp,
3634 int instance_size,
3635 int instance_fields_start,
3636 int instance_fields_end,
3637 int static_fields_end) {
3638
3639 assert(name != NULL, "invariant");
3640
3641 tty->print("%s: field layout\n", name->as_klass_external_name());
3642 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3643 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3644 if (!fs.access_flags().is_static()) {
3645 tty->print(" @%3d \"%s\" %s\n",
3646 fs.offset(),
3647 fs.name()->as_klass_external_name(),
3648 fs.signature()->as_klass_external_name());
3649 }
3650 }
3651 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3652 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3653 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3654 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3655 if (fs.access_flags().is_static()) {
3656 tty->print(" @%3d \"%s\" %s\n",
3657 fs.offset(),
3658 fs.name()->as_klass_external_name(),
3659 fs.signature()->as_klass_external_name());
3660 }
3661 }
3662 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3663 tty->print("\n");
3664 }
3665 #endif
3666
3667 // Values needed for oopmap and InstanceKlass creation
3668 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3669 public:
3670 int* nonstatic_oop_offsets;
3671 unsigned int* nonstatic_oop_counts;
3672 unsigned int nonstatic_oop_map_count;
3673 unsigned int total_oop_map_count;
3674 int instance_size;
3675 int nonstatic_field_size;
3676 int static_field_size;
3677 bool has_nonstatic_fields;
3678 };
3679
3680 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3681 void ClassFileParser::layout_fields(ConstantPool* cp,
3682 const FieldAllocationCount* fac,
3683 const ClassAnnotationCollector* parsed_annotations,
3684 FieldLayoutInfo* info,
3685 TRAPS) {
3686
3687 assert(cp != NULL, "invariant");
3688
3689 // Field size and offset computation
3690 int nonstatic_field_size = _super_klass == NULL ? 0 :
3691 _super_klass->nonstatic_field_size();
3692
3693 // Count the contended fields by type.
3694 //
3695 // We ignore static fields, because @Contended is not supported for them.
3696 // The layout code below will also ignore the static fields.
3697 int nonstatic_contended_count = 0;
3698 FieldAllocationCount fac_contended;
3699 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3700 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3701 if (fs.is_contended()) {
3702 fac_contended.count[atype]++;
3703 if (!fs.access_flags().is_static()) {
3704 nonstatic_contended_count++;
3705 }
3706 }
3707 }
3708
3709
3710 // Calculate the starting byte offsets
3711 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3712 int next_static_double_offset = next_static_oop_offset +
3713 ((fac->count[STATIC_OOP]) * heapOopSize);
3714 if ( fac->count[STATIC_DOUBLE] &&
3715 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3716 Universe::field_type_should_be_aligned(T_LONG)) ) {
3717 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3718 }
3719
3720 int next_static_word_offset = next_static_double_offset +
3721 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3722 int next_static_short_offset = next_static_word_offset +
3723 ((fac->count[STATIC_WORD]) * BytesPerInt);
3724 int next_static_byte_offset = next_static_short_offset +
3725 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3726
3727 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3728 nonstatic_field_size * heapOopSize;
3729
3730 int next_nonstatic_field_offset = nonstatic_fields_start;
3731
3732 const bool is_contended_class = parsed_annotations->is_contended();
3733
3734 // Class is contended, pad before all the fields
3735 if (is_contended_class) {
3736 next_nonstatic_field_offset += ContendedPaddingWidth;
3737 }
3738
3739 // Compute the non-contended fields count.
3740 // The packing code below relies on these counts to determine if some field
3741 // can be squeezed into the alignment gap. Contended fields are obviously
3742 // exempt from that.
3743 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3744 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3745 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3746 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3747 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3748
3749 // Total non-static fields count, including every contended field
3750 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3751 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3752 fac->count[NONSTATIC_OOP];
3753
3754 const bool super_has_nonstatic_fields =
3755 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3756 const bool has_nonstatic_fields =
3757 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3758
3759
3760 // Prepare list of oops for oop map generation.
3761 //
3762 // "offset" and "count" lists are describing the set of contiguous oop
3763 // regions. offset[i] is the start of the i-th region, which then has
3764 // count[i] oops following. Before we know how many regions are required,
3765 // we pessimistically allocate the maps to fit all the oops into the
3766 // distinct regions.
3767 //
3768 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3769 // to figure out if we still need to do this.
3770 unsigned int nonstatic_oop_map_count = 0;
3771 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3772
3773 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3774 THREAD, int, max_nonstatic_oop_maps);
3775 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3776 THREAD, unsigned int, max_nonstatic_oop_maps);
3777
3778 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3779
3780 bool compact_fields = CompactFields;
3781 int allocation_style = FieldsAllocationStyle;
3782 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3783 assert(false, "0 <= FieldsAllocationStyle <= 2");
3784 allocation_style = 1; // Optimistic
3785 }
3786
3787 // The next classes have predefined hard-coded fields offsets
3788 // (see in JavaClasses::compute_hard_coded_offsets()).
3789 // Use default fields allocation order for them.
3790 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3791 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3792 _class_name == vmSymbols::java_lang_Class() ||
3793 _class_name == vmSymbols::java_lang_ClassLoader() ||
3794 _class_name == vmSymbols::java_lang_ref_Reference() ||
3795 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3796 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3797 _class_name == vmSymbols::java_lang_String() ||
3798 _class_name == vmSymbols::java_lang_Throwable() ||
3799 _class_name == vmSymbols::java_lang_Boolean() ||
3800 _class_name == vmSymbols::java_lang_Character() ||
3801 _class_name == vmSymbols::java_lang_Float() ||
3802 _class_name == vmSymbols::java_lang_Double() ||
3803 _class_name == vmSymbols::java_lang_Byte() ||
3804 _class_name == vmSymbols::java_lang_Short() ||
3805 _class_name == vmSymbols::java_lang_Integer() ||
3806 _class_name == vmSymbols::java_lang_Long())) {
3807 allocation_style = 0; // Allocate oops first
3808 compact_fields = false; // Don't compact fields
3809 }
3810
3811 int next_nonstatic_oop_offset = 0;
3812 int next_nonstatic_double_offset = 0;
3813
3814 // Rearrange fields for a given allocation style
3815 if( allocation_style == 0 ) {
3816 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3817 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3818 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3819 (nonstatic_oop_count * heapOopSize);
3820 } else if( allocation_style == 1 ) {
3821 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3822 next_nonstatic_double_offset = next_nonstatic_field_offset;
3823 } else if( allocation_style == 2 ) {
3824 // Fields allocation: oops fields in super and sub classes are together.
3825 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3826 _super_klass->nonstatic_oop_map_size() > 0 ) {
3827 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3828 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3829 const OopMapBlock* const last_map = first_map + map_count - 1;
3830 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3831 if (next_offset == next_nonstatic_field_offset) {
3832 allocation_style = 0; // allocate oops first
3833 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3834 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3835 (nonstatic_oop_count * heapOopSize);
3836 }
3837 }
3838 if( allocation_style == 2 ) {
3839 allocation_style = 1; // allocate oops last
3840 next_nonstatic_double_offset = next_nonstatic_field_offset;
3841 }
3842 } else {
3843 ShouldNotReachHere();
3844 }
3845
3846 int nonstatic_oop_space_count = 0;
3847 int nonstatic_word_space_count = 0;
3848 int nonstatic_short_space_count = 0;
3849 int nonstatic_byte_space_count = 0;
3850 int nonstatic_oop_space_offset = 0;
3851 int nonstatic_word_space_offset = 0;
3852 int nonstatic_short_space_offset = 0;
3853 int nonstatic_byte_space_offset = 0;
3854
3855 // Try to squeeze some of the fields into the gaps due to
3856 // long/double alignment.
3857 if (nonstatic_double_count > 0) {
3858 int offset = next_nonstatic_double_offset;
3859 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
3860 if (compact_fields && offset != next_nonstatic_double_offset) {
3861 // Allocate available fields into the gap before double field.
3862 int length = next_nonstatic_double_offset - offset;
3863 assert(length == BytesPerInt, "");
3864 nonstatic_word_space_offset = offset;
3865 if (nonstatic_word_count > 0) {
3866 nonstatic_word_count -= 1;
3867 nonstatic_word_space_count = 1; // Only one will fit
3868 length -= BytesPerInt;
3869 offset += BytesPerInt;
3870 }
3871 nonstatic_short_space_offset = offset;
3872 while (length >= BytesPerShort && nonstatic_short_count > 0) {
3873 nonstatic_short_count -= 1;
3874 nonstatic_short_space_count += 1;
3875 length -= BytesPerShort;
3876 offset += BytesPerShort;
3877 }
3878 nonstatic_byte_space_offset = offset;
3879 while (length > 0 && nonstatic_byte_count > 0) {
3880 nonstatic_byte_count -= 1;
3881 nonstatic_byte_space_count += 1;
3882 length -= 1;
3883 }
3884 // Allocate oop field in the gap if there are no other fields for that.
3885 nonstatic_oop_space_offset = offset;
3886 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3887 allocation_style != 0) { // when oop fields not first
3888 nonstatic_oop_count -= 1;
3889 nonstatic_oop_space_count = 1; // Only one will fit
3890 length -= heapOopSize;
3891 offset += heapOopSize;
3892 }
3893 }
3894 }
3895
3896 int next_nonstatic_word_offset = next_nonstatic_double_offset +
3897 (nonstatic_double_count * BytesPerLong);
3898 int next_nonstatic_short_offset = next_nonstatic_word_offset +
3899 (nonstatic_word_count * BytesPerInt);
3900 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3901 (nonstatic_short_count * BytesPerShort);
3902 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3903 nonstatic_byte_count;
3904
3905 // let oops jump before padding with this allocation style
3906 if( allocation_style == 1 ) {
3907 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3908 if( nonstatic_oop_count > 0 ) {
3909 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
3910 }
3911 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3912 }
3913
3914 // Iterate over fields again and compute correct offsets.
3915 // The field allocation type was temporarily stored in the offset slot.
3916 // oop fields are located before non-oop fields (static and non-static).
3917 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3918
3919 // skip already laid out fields
3920 if (fs.is_offset_set()) continue;
3921
3922 // contended instance fields are handled below
3923 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3924
3925 int real_offset = 0;
3926 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3927
3928 // pack the rest of the fields
3929 switch (atype) {
3930 case STATIC_OOP:
3931 real_offset = next_static_oop_offset;
3932 next_static_oop_offset += heapOopSize;
3933 break;
3934 case STATIC_BYTE:
3935 real_offset = next_static_byte_offset;
3936 next_static_byte_offset += 1;
3937 break;
3938 case STATIC_SHORT:
3939 real_offset = next_static_short_offset;
3940 next_static_short_offset += BytesPerShort;
3941 break;
3942 case STATIC_WORD:
3943 real_offset = next_static_word_offset;
3944 next_static_word_offset += BytesPerInt;
3945 break;
3946 case STATIC_DOUBLE:
3947 real_offset = next_static_double_offset;
3948 next_static_double_offset += BytesPerLong;
3949 break;
3950 case NONSTATIC_OOP:
3951 if( nonstatic_oop_space_count > 0 ) {
3952 real_offset = nonstatic_oop_space_offset;
3953 nonstatic_oop_space_offset += heapOopSize;
3954 nonstatic_oop_space_count -= 1;
3955 } else {
3956 real_offset = next_nonstatic_oop_offset;
3957 next_nonstatic_oop_offset += heapOopSize;
3958 }
3959
3960 // Record this oop in the oop maps
3961 if( nonstatic_oop_map_count > 0 &&
3962 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3963 real_offset -
3964 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3965 heapOopSize ) {
3966 // This oop is adjacent to the previous one, add to current oop map
3967 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3968 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3969 } else {
3970 // This oop is not adjacent to the previous one, create new oop map
3971 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3972 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3973 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3974 nonstatic_oop_map_count += 1;
3975 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3976 first_nonstatic_oop_offset = real_offset;
3977 }
3978 }
3979 break;
3980 case NONSTATIC_BYTE:
3981 if( nonstatic_byte_space_count > 0 ) {
3982 real_offset = nonstatic_byte_space_offset;
3983 nonstatic_byte_space_offset += 1;
3984 nonstatic_byte_space_count -= 1;
3985 } else {
3986 real_offset = next_nonstatic_byte_offset;
3987 next_nonstatic_byte_offset += 1;
3988 }
3989 break;
3990 case NONSTATIC_SHORT:
3991 if( nonstatic_short_space_count > 0 ) {
3992 real_offset = nonstatic_short_space_offset;
3993 nonstatic_short_space_offset += BytesPerShort;
3994 nonstatic_short_space_count -= 1;
3995 } else {
3996 real_offset = next_nonstatic_short_offset;
3997 next_nonstatic_short_offset += BytesPerShort;
3998 }
3999 break;
4000 case NONSTATIC_WORD:
4001 if( nonstatic_word_space_count > 0 ) {
4002 real_offset = nonstatic_word_space_offset;
4003 nonstatic_word_space_offset += BytesPerInt;
4004 nonstatic_word_space_count -= 1;
4005 } else {
4006 real_offset = next_nonstatic_word_offset;
4007 next_nonstatic_word_offset += BytesPerInt;
4008 }
4009 break;
4010 case NONSTATIC_DOUBLE:
4011 real_offset = next_nonstatic_double_offset;
4012 next_nonstatic_double_offset += BytesPerLong;
4013 break;
4014 default:
4015 ShouldNotReachHere();
4016 }
4017 fs.set_offset(real_offset);
4018 }
4019
4020
4021 // Handle the contended cases.
4022 //
4023 // Each contended field should not intersect the cache line with another contended field.
4024 // In the absence of alignment information, we end up with pessimistically separating
4025 // the fields with full-width padding.
4026 //
4027 // Additionally, this should not break alignment for the fields, so we round the alignment up
4028 // for each field.
4029 if (nonstatic_contended_count > 0) {
4030
4031 // if there is at least one contended field, we need to have pre-padding for them
4032 next_nonstatic_padded_offset += ContendedPaddingWidth;
4033
4034 // collect all contended groups
4035 ResourceBitMap bm(cp->size());
4036 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4037 // skip already laid out fields
4038 if (fs.is_offset_set()) continue;
4039
4040 if (fs.is_contended()) {
4041 bm.set_bit(fs.contended_group());
4042 }
4043 }
4044
4045 int current_group = -1;
4046 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4047
4048 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4049
4050 // skip already laid out fields
4051 if (fs.is_offset_set()) continue;
4052
4053 // skip non-contended fields and fields from different group
4054 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4055
4056 // handle statics below
4057 if (fs.access_flags().is_static()) continue;
4058
4059 int real_offset = 0;
4060 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4061
4062 switch (atype) {
4063 case NONSTATIC_BYTE:
4064 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4065 real_offset = next_nonstatic_padded_offset;
4066 next_nonstatic_padded_offset += 1;
4067 break;
4068
4069 case NONSTATIC_SHORT:
4070 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4071 real_offset = next_nonstatic_padded_offset;
4072 next_nonstatic_padded_offset += BytesPerShort;
4073 break;
4074
4075 case NONSTATIC_WORD:
4076 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4077 real_offset = next_nonstatic_padded_offset;
4078 next_nonstatic_padded_offset += BytesPerInt;
4079 break;
4080
4081 case NONSTATIC_DOUBLE:
4082 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4083 real_offset = next_nonstatic_padded_offset;
4084 next_nonstatic_padded_offset += BytesPerLong;
4085 break;
4086
4087 case NONSTATIC_OOP:
4088 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4089 real_offset = next_nonstatic_padded_offset;
4090 next_nonstatic_padded_offset += heapOopSize;
4091
4092 // Record this oop in the oop maps
4093 if( nonstatic_oop_map_count > 0 &&
4094 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4095 real_offset -
4096 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4097 heapOopSize ) {
4098 // This oop is adjacent to the previous one, add to current oop map
4099 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4100 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4101 } else {
4102 // This oop is not adjacent to the previous one, create new oop map
4103 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4104 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4105 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4106 nonstatic_oop_map_count += 1;
4107 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4108 first_nonstatic_oop_offset = real_offset;
4109 }
4110 }
4111 break;
4112
4113 default:
4114 ShouldNotReachHere();
4115 }
4116
4117 if (fs.contended_group() == 0) {
4118 // Contended group defines the equivalence class over the fields:
4119 // the fields within the same contended group are not inter-padded.
4120 // The only exception is default group, which does not incur the
4121 // equivalence, and so requires intra-padding.
4122 next_nonstatic_padded_offset += ContendedPaddingWidth;
4123 }
4124
4125 fs.set_offset(real_offset);
4126 } // for
4127
4128 // Start laying out the next group.
4129 // Note that this will effectively pad the last group in the back;
4130 // this is expected to alleviate memory contention effects for
4131 // subclass fields and/or adjacent object.
4132 // If this was the default group, the padding is already in place.
4133 if (current_group != 0) {
4134 next_nonstatic_padded_offset += ContendedPaddingWidth;
4135 }
4136 }
4137
4138 // handle static fields
4139 }
4140
4141 // Entire class is contended, pad in the back.
4142 // This helps to alleviate memory contention effects for subclass fields
4143 // and/or adjacent object.
4144 if (is_contended_class) {
4145 next_nonstatic_padded_offset += ContendedPaddingWidth;
4146 }
4147
4148 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4149
4150 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, heapOopSize);
4151 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4152 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4153
4154 int static_field_size = (static_fields_end -
4155 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4156 nonstatic_field_size = nonstatic_field_size +
4157 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4158
4159 int instance_size = align_object_size(instance_end / wordSize);
4160
4161 assert(instance_size == align_object_size(align_up(
4162 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4163 wordSize) / wordSize), "consistent layout helper value");
4164
4165 // Invariant: nonstatic_field end/start should only change if there are
4166 // nonstatic fields in the class, or if the class is contended. We compare
4167 // against the non-aligned value, so that end alignment will not fail the
4168 // assert without actually having the fields.
4169 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4170 is_contended_class ||
4171 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4172
4173 // Number of non-static oop map blocks allocated at end of klass.
4174 const unsigned int total_oop_map_count =
4175 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4176 first_nonstatic_oop_offset);
4177
4178 #ifndef PRODUCT
4179 if (PrintFieldLayout) {
4180 print_field_layout(_class_name,
4181 _fields,
4182 cp,
4183 instance_size,
4184 nonstatic_fields_start,
4185 nonstatic_fields_end,
4186 static_fields_end);
4187 }
4188
4189 #endif
4190 // Pass back information needed for InstanceKlass creation
4191 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4192 info->nonstatic_oop_counts = nonstatic_oop_counts;
4193 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4194 info->total_oop_map_count = total_oop_map_count;
4195 info->instance_size = instance_size;
4196 info->static_field_size = static_field_size;
4197 info->nonstatic_field_size = nonstatic_field_size;
4198 info->has_nonstatic_fields = has_nonstatic_fields;
4199 }
4200
4201 static void fill_oop_maps(const InstanceKlass* k,
4202 unsigned int nonstatic_oop_map_count,
4203 const int* nonstatic_oop_offsets,
4204 const unsigned int* nonstatic_oop_counts) {
4205
4206 assert(k != NULL, "invariant");
4207
4208 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4209 const InstanceKlass* const super = k->superklass();
4210 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4211 if (super_count > 0) {
4212 // Copy maps from superklass
4213 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4214 for (unsigned int i = 0; i < super_count; ++i) {
4215 *this_oop_map++ = *super_oop_map++;
4216 }
4217 }
4218
4219 if (nonstatic_oop_map_count > 0) {
4220 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4221 // The counts differ because there is no gap between superklass's last oop
4222 // field and the first local oop field. Extend the last oop map copied
4223 // from the superklass instead of creating new one.
4224 nonstatic_oop_map_count--;
4225 nonstatic_oop_offsets++;
4226 this_oop_map--;
4227 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4228 this_oop_map++;
4229 }
4230
4231 // Add new map blocks, fill them
4232 while (nonstatic_oop_map_count-- > 0) {
4233 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4234 this_oop_map->set_count(*nonstatic_oop_counts++);
4235 this_oop_map++;
4236 }
4237 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4238 this_oop_map, "sanity");
4239 }
4240 }
4241
4242
4243 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4244 assert(ik != NULL, "invariant");
4245
4246 const Klass* const super = ik->super();
4247
4248 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4249 // in which case we don't have to register objects as finalizable
4250 if (!_has_empty_finalizer) {
4251 if (_has_finalizer ||
4252 (super != NULL && super->has_finalizer())) {
4253 ik->set_has_finalizer();
4254 }
4255 }
4256
4257 #ifdef ASSERT
4258 bool f = false;
4259 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4260 vmSymbols::void_method_signature());
4261 if (m != NULL && !m->is_empty_method()) {
4262 f = true;
4263 }
4264
4265 // Spec doesn't prevent agent from redefinition of empty finalizer.
4266 // Despite the fact that it's generally bad idea and redefined finalizer
4267 // will not work as expected we shouldn't abort vm in this case
4268 if (!ik->has_redefined_this_or_super()) {
4269 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4270 }
4271 #endif
4272
4273 // Check if this klass supports the java.lang.Cloneable interface
4274 if (SystemDictionary::Cloneable_klass_loaded()) {
4275 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4276 ik->set_is_cloneable();
4277 }
4278 }
4279
4280 // Check if this klass has a vanilla default constructor
4281 if (super == NULL) {
4282 // java.lang.Object has empty default constructor
4283 ik->set_has_vanilla_constructor();
4284 } else {
4285 if (super->has_vanilla_constructor() &&
4286 _has_vanilla_constructor) {
4287 ik->set_has_vanilla_constructor();
4288 }
4289 #ifdef ASSERT
4290 bool v = false;
4291 if (super->has_vanilla_constructor()) {
4292 const Method* const constructor =
4293 ik->find_method(vmSymbols::object_initializer_name(),
4294 vmSymbols::void_method_signature());
4295 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4296 v = true;
4297 }
4298 }
4299 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4300 #endif
4301 }
4302
4303 // If it cannot be fast-path allocated, set a bit in the layout helper.
4304 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4305 assert(ik->size_helper() > 0, "layout_helper is initialized");
4306 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4307 || ik->is_abstract() || ik->is_interface()
4308 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4309 || ik->size_helper() >= FastAllocateSizeLimit) {
4310 // Forbid fast-path allocation.
4311 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4312 ik->set_layout_helper(lh);
4313 }
4314 }
4315
4316 // Attach super classes and interface classes to class loader data
4317 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4318 TRAPS) {
4319 assert(defined_klass != NULL, "invariant");
4320
4321 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4322 if (defining_loader_data->is_the_null_class_loader_data()) {
4323 // Dependencies to null class loader data are implicit.
4324 return;
4325 } else {
4326 // add super class dependency
4327 Klass* const super = defined_klass->super();
4328 if (super != NULL) {
4329 defining_loader_data->record_dependency(super, CHECK);
4330 }
4331
4332 // add super interface dependencies
4333 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4334 if (local_interfaces != NULL) {
4335 const int length = local_interfaces->length();
4336 for (int i = 0; i < length; i++) {
4337 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4338 }
4339 }
4340 }
4341 }
4342
4343 // utility methods for appending an array with check for duplicates
4344
4345 static void append_interfaces(GrowableArray<Klass*>* result,
4346 const Array<Klass*>* const ifs) {
4347 // iterate over new interfaces
4348 for (int i = 0; i < ifs->length(); i++) {
4349 Klass* const e = ifs->at(i);
4350 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4351 // add new interface
4352 result->append_if_missing(e);
4353 }
4354 }
4355
4356 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4357 Array<Klass*>* local_ifs,
4358 ClassLoaderData* loader_data,
4359 TRAPS) {
4360 assert(local_ifs != NULL, "invariant");
4361 assert(loader_data != NULL, "invariant");
4362
4363 // Compute maximum size for transitive interfaces
4364 int max_transitive_size = 0;
4365 int super_size = 0;
4366 // Add superclass transitive interfaces size
4367 if (super != NULL) {
4368 super_size = super->transitive_interfaces()->length();
4369 max_transitive_size += super_size;
4370 }
4371 // Add local interfaces' super interfaces
4372 const int local_size = local_ifs->length();
4373 for (int i = 0; i < local_size; i++) {
4374 Klass* const l = local_ifs->at(i);
4375 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4376 }
4377 // Finally add local interfaces
4378 max_transitive_size += local_size;
4379 // Construct array
4380 if (max_transitive_size == 0) {
4381 // no interfaces, use canonicalized array
4382 return Universe::the_empty_klass_array();
4383 } else if (max_transitive_size == super_size) {
4384 // no new local interfaces added, share superklass' transitive interface array
4385 return super->transitive_interfaces();
4386 } else if (max_transitive_size == local_size) {
4387 // only local interfaces added, share local interface array
4388 return local_ifs;
4389 } else {
4390 ResourceMark rm;
4391 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4392
4393 // Copy down from superclass
4394 if (super != NULL) {
4395 append_interfaces(result, super->transitive_interfaces());
4396 }
4397
4398 // Copy down from local interfaces' superinterfaces
4399 for (int i = 0; i < local_size; i++) {
4400 Klass* const l = local_ifs->at(i);
4401 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4402 }
4403 // Finally add local interfaces
4404 append_interfaces(result, local_ifs);
4405
4406 // length will be less than the max_transitive_size if duplicates were removed
4407 const int length = result->length();
4408 assert(length <= max_transitive_size, "just checking");
4409 Array<Klass*>* const new_result =
4410 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4411 for (int i = 0; i < length; i++) {
4412 Klass* const e = result->at(i);
4413 assert(e != NULL, "just checking");
4414 new_result->at_put(i, e);
4415 }
4416 return new_result;
4417 }
4418 }
4419
4420 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4421 assert(this_klass != NULL, "invariant");
4422 const Klass* const super = this_klass->super();
4423 if (super != NULL) {
4424
4425 // If the loader is not the boot loader then throw an exception if its
4426 // superclass is in package jdk.internal.reflect and its loader is not a
4427 // special reflection class loader
4428 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4429 assert(super->is_instance_klass(), "super is not instance klass");
4430 PackageEntry* super_package = super->package();
4431 if (super_package != NULL &&
4432 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4433 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4434 ResourceMark rm(THREAD);
4435 Exceptions::fthrow(
4436 THREAD_AND_LOCATION,
4437 vmSymbols::java_lang_IllegalAccessError(),
4438 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4439 this_klass->external_name(),
4440 this_klass->class_loader_data()->loader_name(),
4441 super->external_name());
4442 return;
4443 }
4444 }
4445
4446 Reflection::VerifyClassAccessResults vca_result =
4447 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4448 if (vca_result != Reflection::ACCESS_OK) {
4449 ResourceMark rm(THREAD);
4450 char* msg = Reflection::verify_class_access_msg(this_klass,
4451 InstanceKlass::cast(super),
4452 vca_result);
4453 if (msg == NULL) {
4454 Exceptions::fthrow(
4455 THREAD_AND_LOCATION,
4456 vmSymbols::java_lang_IllegalAccessError(),
4457 "class %s cannot access its superclass %s",
4458 this_klass->external_name(),
4459 super->external_name());
4460 } else {
4461 // Add additional message content.
4462 Exceptions::fthrow(
4463 THREAD_AND_LOCATION,
4464 vmSymbols::java_lang_IllegalAccessError(),
4465 "superclass access check failed: %s",
4466 msg);
4467 }
4468 }
4469 }
4470 }
4471
4472
4473 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4474 assert(this_klass != NULL, "invariant");
4475 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4476 const int lng = local_interfaces->length();
4477 for (int i = lng - 1; i >= 0; i--) {
4478 Klass* const k = local_interfaces->at(i);
4479 assert (k != NULL && k->is_interface(), "invalid interface");
4480 Reflection::VerifyClassAccessResults vca_result =
4481 Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false);
4482 if (vca_result != Reflection::ACCESS_OK) {
4483 ResourceMark rm(THREAD);
4484 char* msg = Reflection::verify_class_access_msg(this_klass,
4485 InstanceKlass::cast(k),
4486 vca_result);
4487 if (msg == NULL) {
4488 Exceptions::fthrow(
4489 THREAD_AND_LOCATION,
4490 vmSymbols::java_lang_IllegalAccessError(),
4491 "class %s cannot access its superinterface %s",
4492 this_klass->external_name(),
4493 k->external_name());
4494 } else {
4495 // Add additional message content.
4496 Exceptions::fthrow(
4497 THREAD_AND_LOCATION,
4498 vmSymbols::java_lang_IllegalAccessError(),
4499 "superinterface check failed: %s",
4500 msg);
4501 }
4502 }
4503 }
4504 }
4505
4506
4507 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4508 assert(this_klass != NULL, "invariant");
4509 const Array<Method*>* const methods = this_klass->methods();
4510 const int num_methods = methods->length();
4511
4512 // go thru each method and check if it overrides a final method
4513 for (int index = 0; index < num_methods; index++) {
4514 const Method* const m = methods->at(index);
4515
4516 // skip private, static, and <init> methods
4517 if ((!m->is_private() && !m->is_static()) &&
4518 (m->name() != vmSymbols::object_initializer_name())) {
4519
4520 const Symbol* const name = m->name();
4521 const Symbol* const signature = m->signature();
4522 const Klass* k = this_klass->super();
4523 const Method* super_m = NULL;
4524 while (k != NULL) {
4525 // skip supers that don't have final methods.
4526 if (k->has_final_method()) {
4527 // lookup a matching method in the super class hierarchy
4528 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4529 if (super_m == NULL) {
4530 break; // didn't find any match; get out
4531 }
4532
4533 if (super_m->is_final() && !super_m->is_static() &&
4534 // matching method in super is final, and not static
4535 (Reflection::verify_field_access(this_klass,
4536 super_m->method_holder(),
4537 super_m->method_holder(),
4538 super_m->access_flags(), false))
4539 // this class can access super final method and therefore override
4540 ) {
4541 ResourceMark rm(THREAD);
4542 Exceptions::fthrow(
4543 THREAD_AND_LOCATION,
4544 vmSymbols::java_lang_VerifyError(),
4545 "class %s overrides final method %s.%s%s",
4546 this_klass->external_name(),
4547 super_m->method_holder()->external_name(),
4548 name->as_C_string(),
4549 signature->as_C_string()
4550 );
4551 return;
4552 }
4553
4554 // continue to look from super_m's holder's super.
4555 k = super_m->method_holder()->super();
4556 continue;
4557 }
4558
4559 k = k->super();
4560 }
4561 }
4562 }
4563 }
4564
4565
4566 // assumes that this_klass is an interface
4567 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4568 assert(this_klass != NULL, "invariant");
4569 assert(this_klass->is_interface(), "not an interface");
4570 const Array<Method*>* methods = this_klass->methods();
4571 const int num_methods = methods->length();
4572
4573 for (int index = 0; index < num_methods; index++) {
4574 const Method* const m = methods->at(index);
4575 // if m is static and not the init method, throw a verify error
4576 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4577 ResourceMark rm(THREAD);
4578 Exceptions::fthrow(
4579 THREAD_AND_LOCATION,
4580 vmSymbols::java_lang_VerifyError(),
4581 "Illegal static method %s in interface %s",
4582 m->name()->as_C_string(),
4583 this_klass->external_name()
4584 );
4585 return;
4586 }
4587 }
4588 }
4589
4590 // utility methods for format checking
4591
4592 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4593 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4594 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4595 if (is_module) {
4596 ResourceMark rm(THREAD);
4597 Exceptions::fthrow(
4598 THREAD_AND_LOCATION,
4599 vmSymbols::java_lang_NoClassDefFoundError(),
4600 "%s is not a class because access_flag ACC_MODULE is set",
4601 _class_name->as_C_string());
4602 return;
4603 }
4604
4605 if (!_need_verify) { return; }
4606
4607 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4608 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4609 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4610 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4611 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4612 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4613 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4614
4615 if ((is_abstract && is_final) ||
4616 (is_interface && !is_abstract) ||
4617 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4618 (!is_interface && major_gte_15 && is_annotation)) {
4619 ResourceMark rm(THREAD);
4620 Exceptions::fthrow(
4621 THREAD_AND_LOCATION,
4622 vmSymbols::java_lang_ClassFormatError(),
4623 "Illegal class modifiers in class %s: 0x%X",
4624 _class_name->as_C_string(), flags
4625 );
4626 return;
4627 }
4628 }
4629
4630 static bool has_illegal_visibility(jint flags) {
4631 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4632 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4633 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4634
4635 return ((is_public && is_protected) ||
4636 (is_public && is_private) ||
4637 (is_protected && is_private));
4638 }
4639
4640 static bool is_supported_version(u2 major, u2 minor){
4641 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4642 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4643 (major <= max_version) &&
4644 ((major != max_version) ||
4645 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4646 }
4647
4648 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4649 bool is_interface,
4650 TRAPS) const {
4651 if (!_need_verify) { return; }
4652
4653 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4654 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4655 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4656 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4657 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4658 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4659 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4660 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4661 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4662
4663 bool is_illegal = false;
4664
4665 if (is_interface) {
4666 if (!is_public || !is_static || !is_final || is_private ||
4667 is_protected || is_volatile || is_transient ||
4668 (major_gte_15 && is_enum)) {
4669 is_illegal = true;
4670 }
4671 } else { // not interface
4672 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4673 is_illegal = true;
4674 }
4675 }
4676
4677 if (is_illegal) {
4678 ResourceMark rm(THREAD);
4679 Exceptions::fthrow(
4680 THREAD_AND_LOCATION,
4681 vmSymbols::java_lang_ClassFormatError(),
4682 "Illegal field modifiers in class %s: 0x%X",
4683 _class_name->as_C_string(), flags);
4684 return;
4685 }
4686 }
4687
4688 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4689 bool is_interface,
4690 const Symbol* name,
4691 TRAPS) const {
4692 if (!_need_verify) { return; }
4693
4694 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4695 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4696 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4697 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4698 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4699 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4700 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4701 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4702 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4703 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4704 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4705 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4706 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4707
4708 bool is_illegal = false;
4709
4710 if (is_interface) {
4711 if (major_gte_8) {
4712 // Class file version is JAVA_8_VERSION or later Methods of
4713 // interfaces may set any of the flags except ACC_PROTECTED,
4714 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4715 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4716 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4717 (is_native || is_protected || is_final || is_synchronized) ||
4718 // If a specific method of a class or interface has its
4719 // ACC_ABSTRACT flag set, it must not have any of its
4720 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4721 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4722 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4723 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4724 (is_abstract && (is_private || is_static || is_strict))) {
4725 is_illegal = true;
4726 }
4727 } else if (major_gte_15) {
4728 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4729 if (!is_public || is_private || is_protected || is_static || is_final ||
4730 is_synchronized || is_native || !is_abstract || is_strict) {
4731 is_illegal = true;
4732 }
4733 } else {
4734 // Class file version is pre-JAVA_1_5_VERSION
4735 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4736 is_illegal = true;
4737 }
4738 }
4739 } else { // not interface
4740 if (has_illegal_visibility(flags)) {
4741 is_illegal = true;
4742 } else {
4743 if (is_initializer) {
4744 if (is_static || is_final || is_synchronized || is_native ||
4745 is_abstract || (major_gte_15 && is_bridge)) {
4746 is_illegal = true;
4747 }
4748 } else { // not initializer
4749 if (is_abstract) {
4750 if ((is_final || is_native || is_private || is_static ||
4751 (major_gte_15 && (is_synchronized || is_strict)))) {
4752 is_illegal = true;
4753 }
4754 }
4755 }
4756 }
4757 }
4758
4759 if (is_illegal) {
4760 ResourceMark rm(THREAD);
4761 Exceptions::fthrow(
4762 THREAD_AND_LOCATION,
4763 vmSymbols::java_lang_ClassFormatError(),
4764 "Method %s in class %s has illegal modifiers: 0x%X",
4765 name->as_C_string(), _class_name->as_C_string(), flags);
4766 return;
4767 }
4768 }
4769
4770 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4771 int length,
4772 TRAPS) const {
4773 assert(_need_verify, "only called when _need_verify is true");
4774 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4775 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4776 }
4777 }
4778
4779 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4780 // In class names, '/' separates unqualified names. This is verified in this function also.
4781 // Method names also may not contain the characters '<' or '>', unless <init>
4782 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4783 // method. Because these names have been checked as special cases before
4784 // calling this method in verify_legal_method_name.
4785 //
4786 // This method is also called from the modular system APIs in modules.cpp
4787 // to verify the validity of module and package names.
4788 bool ClassFileParser::verify_unqualified_name(const char* name,
4789 unsigned int length,
4790 int type) {
4791 for (const char* p = name; p != name + length;) {
4792 jchar ch = *p;
4793 if (ch < 128) {
4794 if (ch == '.' || ch == ';' || ch == '[' ) {
4795 return false; // do not permit '.', ';', or '['
4796 }
4797 if (ch == '/') {
4798 // check for '//' or leading or trailing '/' which are not legal
4799 // unqualified name must not be empty
4800 if (type == ClassFileParser::LegalClass) {
4801 if (p == name || p+1 >= name+length || *(p+1) == '/') {
4802 return false;
4803 }
4804 } else {
4805 return false; // do not permit '/' unless it's class name
4806 }
4807 }
4808 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
4809 return false; // do not permit '<' or '>' in method names
4810 }
4811 p++;
4812 } else {
4813 char* tmp_p = UTF8::next(p, &ch);
4814 p = tmp_p;
4815 }
4816 }
4817 return true;
4818 }
4819
4820 // Take pointer to a string. Skip over the longest part of the string that could
4821 // be taken as a fieldname. Allow '/' if slash_ok is true.
4822 // Return a pointer to just past the fieldname.
4823 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4824 // being true, we saw consecutive slashes (meaning we were looking for a
4825 // qualified path but found something that was badly-formed).
4826 static const char* skip_over_field_name(const char* name,
4827 bool slash_ok,
4828 unsigned int length) {
4829 const char* p;
4830 jboolean last_is_slash = false;
4831 jboolean not_first_ch = false;
4832
4833 for (p = name; p != name + length; not_first_ch = true) {
4834 const char* old_p = p;
4835 jchar ch = *p;
4836 if (ch < 128) {
4837 p++;
4838 // quick check for ascii
4839 if ((ch >= 'a' && ch <= 'z') ||
4840 (ch >= 'A' && ch <= 'Z') ||
4841 (ch == '_' || ch == '$') ||
4842 (not_first_ch && ch >= '0' && ch <= '9')) {
4843 last_is_slash = false;
4844 continue;
4845 }
4846 if (slash_ok && ch == '/') {
4847 if (last_is_slash) {
4848 return NULL; // Don't permit consecutive slashes
4849 }
4850 last_is_slash = true;
4851 continue;
4852 }
4853 }
4854 else {
4855 jint unicode_ch;
4856 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4857 p = tmp_p;
4858 last_is_slash = false;
4859 // Check if ch is Java identifier start or is Java identifier part
4860 // 4672820: call java.lang.Character methods directly without generating separate tables.
4861 EXCEPTION_MARK;
4862
4863 // return value
4864 JavaValue result(T_BOOLEAN);
4865 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4866 JavaCallArguments args;
4867 args.push_int(unicode_ch);
4868
4869 // public static boolean isJavaIdentifierStart(char ch);
4870 JavaCalls::call_static(&result,
4871 SystemDictionary::Character_klass(),
4872 vmSymbols::isJavaIdentifierStart_name(),
4873 vmSymbols::int_bool_signature(),
4874 &args,
4875 THREAD);
4876
4877 if (HAS_PENDING_EXCEPTION) {
4878 CLEAR_PENDING_EXCEPTION;
4879 return 0;
4880 }
4881 if (result.get_jboolean()) {
4882 continue;
4883 }
4884
4885 if (not_first_ch) {
4886 // public static boolean isJavaIdentifierPart(char ch);
4887 JavaCalls::call_static(&result,
4888 SystemDictionary::Character_klass(),
4889 vmSymbols::isJavaIdentifierPart_name(),
4890 vmSymbols::int_bool_signature(),
4891 &args,
4892 THREAD);
4893
4894 if (HAS_PENDING_EXCEPTION) {
4895 CLEAR_PENDING_EXCEPTION;
4896 return 0;
4897 }
4898
4899 if (result.get_jboolean()) {
4900 continue;
4901 }
4902 }
4903 }
4904 return (not_first_ch) ? old_p : NULL;
4905 }
4906 return (not_first_ch) ? p : NULL;
4907 }
4908
4909 // Take pointer to a string. Skip over the longest part of the string that could
4910 // be taken as a field signature. Allow "void" if void_ok.
4911 // Return a pointer to just past the signature.
4912 // Return NULL if no legal signature is found.
4913 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4914 bool void_ok,
4915 unsigned int length,
4916 TRAPS) const {
4917 unsigned int array_dim = 0;
4918 while (length > 0) {
4919 switch (signature[0]) {
4920 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4921 case JVM_SIGNATURE_BOOLEAN:
4922 case JVM_SIGNATURE_BYTE:
4923 case JVM_SIGNATURE_CHAR:
4924 case JVM_SIGNATURE_SHORT:
4925 case JVM_SIGNATURE_INT:
4926 case JVM_SIGNATURE_FLOAT:
4927 case JVM_SIGNATURE_LONG:
4928 case JVM_SIGNATURE_DOUBLE:
4929 return signature + 1;
4930 case JVM_SIGNATURE_CLASS: {
4931 if (_major_version < JAVA_1_5_VERSION) {
4932 // Skip over the class name if one is there
4933 const char* const p = skip_over_field_name(signature + 1, true, --length);
4934
4935 // The next character better be a semicolon
4936 if (p && (p - signature) > 1 && p[0] == ';') {
4937 return p + 1;
4938 }
4939 }
4940 else {
4941 // Skip leading 'L' and ignore first appearance of ';'
4942 length--;
4943 signature++;
4944 char* c = strchr((char*) signature, ';');
4945 // Format check signature
4946 if (c != NULL) {
4947 ResourceMark rm(THREAD);
4948 int newlen = c - (char*) signature;
4949 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
4950 strncpy(sig, signature, newlen);
4951 sig[newlen] = '\0';
4952
4953 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
4954 if (!legal) {
4955 classfile_parse_error("Class name contains illegal character "
4956 "in descriptor in class file %s",
4957 CHECK_0);
4958 return NULL;
4959 }
4960 return signature + newlen + 1;
4961 }
4962 }
4963 return NULL;
4964 }
4965 case JVM_SIGNATURE_ARRAY:
4966 array_dim++;
4967 if (array_dim > 255) {
4968 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4969 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4970 }
4971 // The rest of what's there better be a legal signature
4972 signature++;
4973 length--;
4974 void_ok = false;
4975 break;
4976 default:
4977 return NULL;
4978 }
4979 }
4980 return NULL;
4981 }
4982
4983 // Checks if name is a legal class name.
4984 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4985 if (!_need_verify || _relax_verify) { return; }
4986
4987 char buf[fixed_buffer_size];
4988 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4989 unsigned int length = name->utf8_length();
4990 bool legal = false;
4991
4992 if (length > 0) {
4993 const char* p;
4994 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4995 p = skip_over_field_signature(bytes, false, length, CHECK);
4996 legal = (p != NULL) && ((p - bytes) == (int)length);
4997 } else if (_major_version < JAVA_1_5_VERSION) {
4998 if (bytes[0] != '<') {
4999 p = skip_over_field_name(bytes, true, length);
5000 legal = (p != NULL) && ((p - bytes) == (int)length);
5001 }
5002 } else {
5003 // 4900761: relax the constraints based on JSR202 spec
5004 // Class names may be drawn from the entire Unicode character set.
5005 // Identifiers between '/' must be unqualified names.
5006 // The utf8 string has been verified when parsing cpool entries.
5007 legal = verify_unqualified_name(bytes, length, LegalClass);
5008 }
5009 }
5010 if (!legal) {
5011 ResourceMark rm(THREAD);
5012 assert(_class_name != NULL, "invariant");
5013 Exceptions::fthrow(
5014 THREAD_AND_LOCATION,
5015 vmSymbols::java_lang_ClassFormatError(),
5016 "Illegal class name \"%s\" in class file %s", bytes,
5017 _class_name->as_C_string()
5018 );
5019 return;
5020 }
5021 }
5022
5023 // Checks if name is a legal field name.
5024 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5025 if (!_need_verify || _relax_verify) { return; }
5026
5027 char buf[fixed_buffer_size];
5028 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5029 unsigned int length = name->utf8_length();
5030 bool legal = false;
5031
5032 if (length > 0) {
5033 if (_major_version < JAVA_1_5_VERSION) {
5034 if (bytes[0] != '<') {
5035 const char* p = skip_over_field_name(bytes, false, length);
5036 legal = (p != NULL) && ((p - bytes) == (int)length);
5037 }
5038 } else {
5039 // 4881221: relax the constraints based on JSR202 spec
5040 legal = verify_unqualified_name(bytes, length, LegalField);
5041 }
5042 }
5043
5044 if (!legal) {
5045 ResourceMark rm(THREAD);
5046 assert(_class_name != NULL, "invariant");
5047 Exceptions::fthrow(
5048 THREAD_AND_LOCATION,
5049 vmSymbols::java_lang_ClassFormatError(),
5050 "Illegal field name \"%s\" in class %s", bytes,
5051 _class_name->as_C_string()
5052 );
5053 return;
5054 }
5055 }
5056
5057 // Checks if name is a legal method name.
5058 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5059 if (!_need_verify || _relax_verify) { return; }
5060
5061 assert(name != NULL, "method name is null");
5062 char buf[fixed_buffer_size];
5063 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5064 unsigned int length = name->utf8_length();
5065 bool legal = false;
5066
5067 if (length > 0) {
5068 if (bytes[0] == '<') {
5069 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5070 legal = true;
5071 }
5072 } else if (_major_version < JAVA_1_5_VERSION) {
5073 const char* p;
5074 p = skip_over_field_name(bytes, false, length);
5075 legal = (p != NULL) && ((p - bytes) == (int)length);
5076 } else {
5077 // 4881221: relax the constraints based on JSR202 spec
5078 legal = verify_unqualified_name(bytes, length, LegalMethod);
5079 }
5080 }
5081
5082 if (!legal) {
5083 ResourceMark rm(THREAD);
5084 assert(_class_name != NULL, "invariant");
5085 Exceptions::fthrow(
5086 THREAD_AND_LOCATION,
5087 vmSymbols::java_lang_ClassFormatError(),
5088 "Illegal method name \"%s\" in class %s", bytes,
5089 _class_name->as_C_string()
5090 );
5091 return;
5092 }
5093 }
5094
5095
5096 // Checks if signature is a legal field signature.
5097 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5098 const Symbol* signature,
5099 TRAPS) const {
5100 if (!_need_verify) { return; }
5101
5102 char buf[fixed_buffer_size];
5103 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5104 const unsigned int length = signature->utf8_length();
5105 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5106
5107 if (p == NULL || (p - bytes) != (int)length) {
5108 throwIllegalSignature("Field", name, signature, CHECK);
5109 }
5110 }
5111
5112 // Checks if signature is a legal method signature.
5113 // Returns number of parameters
5114 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5115 const Symbol* signature,
5116 TRAPS) const {
5117 if (!_need_verify) {
5118 // make sure caller's args_size will be less than 0 even for non-static
5119 // method so it will be recomputed in compute_size_of_parameters().
5120 return -2;
5121 }
5122
5123 // Class initializers cannot have args for class format version >= 51.
5124 if (name == vmSymbols::class_initializer_name() &&
5125 signature != vmSymbols::void_method_signature() &&
5126 _major_version >= JAVA_7_VERSION) {
5127 throwIllegalSignature("Method", name, signature, CHECK_0);
5128 return 0;
5129 }
5130
5131 unsigned int args_size = 0;
5132 char buf[fixed_buffer_size];
5133 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5134 unsigned int length = signature->utf8_length();
5135 const char* nextp;
5136
5137 // The first character must be a '('
5138 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5139 length--;
5140 // Skip over legal field signatures
5141 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5142 while ((length > 0) && (nextp != NULL)) {
5143 args_size++;
5144 if (p[0] == 'J' || p[0] == 'D') {
5145 args_size++;
5146 }
5147 length -= nextp - p;
5148 p = nextp;
5149 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5150 }
5151 // The first non-signature thing better be a ')'
5152 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5153 length--;
5154 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5155 // All internal methods must return void
5156 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5157 return args_size;
5158 }
5159 } else {
5160 // Now we better just have a return value
5161 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5162 if (nextp && ((int)length == (nextp - p))) {
5163 return args_size;
5164 }
5165 }
5166 }
5167 }
5168 // Report error
5169 throwIllegalSignature("Method", name, signature, CHECK_0);
5170 return 0;
5171 }
5172
5173 int ClassFileParser::static_field_size() const {
5174 assert(_field_info != NULL, "invariant");
5175 return _field_info->static_field_size;
5176 }
5177
5178 int ClassFileParser::total_oop_map_count() const {
5179 assert(_field_info != NULL, "invariant");
5180 return _field_info->total_oop_map_count;
5181 }
5182
5183 jint ClassFileParser::layout_size() const {
5184 assert(_field_info != NULL, "invariant");
5185 return _field_info->instance_size;
5186 }
5187
5188 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5189 const Array<Method*>* methods) {
5190 assert(ik != NULL, "invariant");
5191 assert(methods != NULL, "invariant");
5192
5193 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5194 // (We used to do this lazily, but now we query it in Rewriter,
5195 // which is eagerly done for every method, so we might as well do it now,
5196 // when everything is fresh in memory.)
5197 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5198
5199 if (klass_id != vmSymbols::NO_SID) {
5200 for (int j = 0; j < methods->length(); ++j) {
5201 Method* method = methods->at(j);
5202 method->init_intrinsic_id();
5203
5204 if (CheckIntrinsics) {
5205 // Check if an intrinsic is defined for method 'method',
5206 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5207 if (method->intrinsic_id() != vmIntrinsics::_none &&
5208 !method->intrinsic_candidate()) {
5209 tty->print("Compiler intrinsic is defined for method [%s], "
5210 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5211 method->name_and_sig_as_C_string(),
5212 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5213 );
5214 tty->cr();
5215 DEBUG_ONLY(vm_exit(1));
5216 }
5217 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5218 // but there is no intrinsic available for it.
5219 if (method->intrinsic_candidate() &&
5220 method->intrinsic_id() == vmIntrinsics::_none) {
5221 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5222 "but no compiler intrinsic is defined for the method.%s",
5223 method->name_and_sig_as_C_string(),
5224 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5225 );
5226 tty->cr();
5227 DEBUG_ONLY(vm_exit(1));
5228 }
5229 }
5230 } // end for
5231
5232 #ifdef ASSERT
5233 if (CheckIntrinsics) {
5234 // Check for orphan methods in the current class. A method m
5235 // of a class C is orphan if an intrinsic is defined for method m,
5236 // but class C does not declare m.
5237 // The check is potentially expensive, therefore it is available
5238 // only in debug builds.
5239
5240 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5241 if (vmIntrinsics::_compiledLambdaForm == id) {
5242 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5243 // generated for the JVM from a LambdaForm and therefore no method
5244 // is defined for it.
5245 continue;
5246 }
5247
5248 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5249 // Check if the current class contains a method with the same
5250 // name, flags, signature.
5251 bool match = false;
5252 for (int j = 0; j < methods->length(); ++j) {
5253 const Method* method = methods->at(j);
5254 if (method->intrinsic_id() == id) {
5255 match = true;
5256 break;
5257 }
5258 }
5259
5260 if (!match) {
5261 char buf[1000];
5262 tty->print("Compiler intrinsic is defined for method [%s], "
5263 "but the method is not available in class [%s].%s",
5264 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5265 buf, sizeof(buf)),
5266 ik->name()->as_C_string(),
5267 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5268 );
5269 tty->cr();
5270 DEBUG_ONLY(vm_exit(1));
5271 }
5272 }
5273 } // end for
5274 } // CheckIntrinsics
5275 #endif // ASSERT
5276 }
5277 }
5278
5279 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5280 if (_klass != NULL) {
5281 return _klass;
5282 }
5283
5284 InstanceKlass* const ik =
5285 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5286
5287 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5288
5289 assert(_klass == ik, "invariant");
5290
5291 ik->set_has_passed_fingerprint_check(false);
5292 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5293 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5294 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5295 // This class matches with a class saved in an AOT library
5296 ik->set_has_passed_fingerprint_check(true);
5297 } else {
5298 ResourceMark rm;
5299 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5300 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5301 }
5302 }
5303
5304 return ik;
5305 }
5306
5307 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5308 assert(ik != NULL, "invariant");
5309
5310 set_klass_to_deallocate(ik);
5311
5312 assert(_field_info != NULL, "invariant");
5313 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5314 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5315 "sanity");
5316
5317 assert(ik->is_instance_klass(), "sanity");
5318 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5319
5320 // Fill in information already parsed
5321 ik->set_should_verify_class(_need_verify);
5322
5323 // Not yet: supers are done below to support the new subtype-checking fields
5324 ik->set_class_loader_data(_loader_data);
5325 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5326 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5327 assert(_fac != NULL, "invariant");
5328 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5329
5330 // this transfers ownership of a lot of arrays from
5331 // the parser onto the InstanceKlass*
5332 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5333
5334 // note that is not safe to use the fields in the parser from this point on
5335 assert(NULL == _cp, "invariant");
5336 assert(NULL == _fields, "invariant");
5337 assert(NULL == _methods, "invariant");
5338 assert(NULL == _inner_classes, "invariant");
5339 assert(NULL == _local_interfaces, "invariant");
5340 assert(NULL == _transitive_interfaces, "invariant");
5341 assert(NULL == _combined_annotations, "invariant");
5342
5343 if (_has_final_method) {
5344 ik->set_has_final_method();
5345 }
5346
5347 ik->copy_method_ordering(_method_ordering, CHECK);
5348 // The InstanceKlass::_methods_jmethod_ids cache
5349 // is managed on the assumption that the initial cache
5350 // size is equal to the number of methods in the class. If
5351 // that changes, then InstanceKlass::idnum_can_increment()
5352 // has to be changed accordingly.
5353 ik->set_initial_method_idnum(ik->methods()->length());
5354
5355 ik->set_name(_class_name);
5356
5357 if (is_anonymous()) {
5358 // _this_class_index is a CONSTANT_Class entry that refers to this
5359 // anonymous class itself. If this class needs to refer to its own methods or
5360 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5361 // _this_class_index. However, because this class is anonymous (it's
5362 // not stored in SystemDictionary), _this_class_index cannot be resolved
5363 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5364 // Therefore, we must eagerly resolve _this_class_index now.
5365 ik->constants()->klass_at_put(_this_class_index, ik);
5366 }
5367
5368 ik->set_minor_version(_minor_version);
5369 ik->set_major_version(_major_version);
5370 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5371 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5372
5373 if (_host_klass != NULL) {
5374 assert (ik->is_anonymous(), "should be the same");
5375 ik->set_host_klass(_host_klass);
5376 }
5377
5378 // Set PackageEntry for this_klass
5379 oop cl = ik->class_loader();
5380 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5381 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5382 ik->set_package(cld, CHECK);
5383
5384 const Array<Method*>* const methods = ik->methods();
5385 assert(methods != NULL, "invariant");
5386 const int methods_len = methods->length();
5387
5388 check_methods_for_intrinsics(ik, methods);
5389
5390 // Fill in field values obtained by parse_classfile_attributes
5391 if (_parsed_annotations->has_any_annotations()) {
5392 _parsed_annotations->apply_to(ik);
5393 }
5394
5395 apply_parsed_class_attributes(ik);
5396
5397 // Miranda methods
5398 if ((_num_miranda_methods > 0) ||
5399 // if this class introduced new miranda methods or
5400 (_super_klass != NULL && _super_klass->has_miranda_methods())
5401 // super class exists and this class inherited miranda methods
5402 ) {
5403 ik->set_has_miranda_methods(); // then set a flag
5404 }
5405
5406 // Fill in information needed to compute superclasses.
5407 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5408
5409 // Initialize itable offset tables
5410 klassItable::setup_itable_offset_table(ik);
5411
5412 // Compute transitive closure of interfaces this class implements
5413 // Do final class setup
5414 fill_oop_maps(ik,
5415 _field_info->nonstatic_oop_map_count,
5416 _field_info->nonstatic_oop_offsets,
5417 _field_info->nonstatic_oop_counts);
5418
5419 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5420 set_precomputed_flags(ik);
5421
5422 // check if this class can access its super class
5423 check_super_class_access(ik, CHECK);
5424
5425 // check if this class can access its superinterfaces
5426 check_super_interface_access(ik, CHECK);
5427
5428 // check if this class overrides any final method
5429 check_final_method_override(ik, CHECK);
5430
5431 // reject static interface methods prior to Java 8
5432 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5433 check_illegal_static_method(ik, CHECK);
5434 }
5435
5436 // Obtain this_klass' module entry
5437 ModuleEntry* module_entry = ik->module();
5438 assert(module_entry != NULL, "module_entry should always be set");
5439
5440 // Obtain java.lang.Module
5441 Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module()));
5442
5443 // Allocate mirror and initialize static fields
5444 // The create_mirror() call will also call compute_modifiers()
5445 java_lang_Class::create_mirror(ik,
5446 Handle(THREAD, _loader_data->class_loader()),
5447 module_handle,
5448 _protection_domain,
5449 CHECK);
5450
5451 assert(_all_mirandas != NULL, "invariant");
5452
5453 // Generate any default methods - default methods are public interface methods
5454 // that have a default implementation. This is new with Java 8.
5455 if (_has_nonstatic_concrete_methods) {
5456 DefaultMethods::generate_default_methods(ik,
5457 _all_mirandas,
5458 CHECK);
5459 }
5460
5461 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5462 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5463 !module_entry->has_default_read_edges()) {
5464 if (!module_entry->set_has_default_read_edges()) {
5465 // We won a potential race
5466 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5467 }
5468 }
5469
5470 // Update the loader_data graph.
5471 record_defined_class_dependencies(ik, CHECK);
5472
5473 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5474
5475 if (!is_internal()) {
5476 if (log_is_enabled(Info, class, load)) {
5477 ResourceMark rm;
5478 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5479 ik->print_class_load_logging(_loader_data, module_name, _stream);
5480 }
5481
5482 if (log_is_enabled(Debug, class, resolve)) {
5483 ResourceMark rm;
5484 // print out the superclass.
5485 const char * from = ik->external_name();
5486 if (ik->java_super() != NULL) {
5487 log_debug(class, resolve)("%s %s (super)",
5488 from,
5489 ik->java_super()->external_name());
5490 }
5491 // print out each of the interface classes referred to by this class.
5492 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5493 if (local_interfaces != NULL) {
5494 const int length = local_interfaces->length();
5495 for (int i = 0; i < length; i++) {
5496 const Klass* const k = local_interfaces->at(i);
5497 const char * to = k->external_name();
5498 log_debug(class, resolve)("%s %s (interface)", from, to);
5499 }
5500 }
5501 }
5502 }
5503
5504 TRACE_INIT_ID(ik);
5505
5506 // If we reach here, all is well.
5507 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5508 // in order for it to not be destroyed in the ClassFileParser destructor.
5509 set_klass_to_deallocate(NULL);
5510
5511 // it's official
5512 set_klass(ik);
5513
5514 debug_only(ik->verify();)
5515 }
5516
5517 // For an anonymous class that is in the unnamed package, move it to its host class's
5518 // package by prepending its host class's package name to its class name and setting
5519 // its _class_name field.
5520 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5521 ResourceMark rm(THREAD);
5522 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5523 "Anonymous class should not be in a package");
5524 const char* host_pkg_name =
5525 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5526
5527 if (host_pkg_name != NULL) {
5528 size_t host_pkg_len = strlen(host_pkg_name);
5529 int class_name_len = _class_name->utf8_length();
5530 char* new_anon_name =
5531 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5532 // Copy host package name and trailing /.
5533 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5534 new_anon_name[host_pkg_len] = '/';
5535 // Append anonymous class name. The anonymous class name can contain odd
5536 // characters. So, do a strncpy instead of using sprintf("%s...").
5537 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5538
5539 // Create a symbol and update the anonymous class name.
5540 _class_name = SymbolTable::new_symbol(new_anon_name,
5541 (int)host_pkg_len + 1 + class_name_len,
5542 CHECK);
5543 }
5544 }
5545
5546 // If the host class and the anonymous class are in the same package then do
5547 // nothing. If the anonymous class is in the unnamed package then move it to its
5548 // host's package. If the classes are in different packages then throw an IAE
5549 // exception.
5550 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5551 assert(_host_klass != NULL, "Expected an anonymous class");
5552
5553 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5554 _class_name->utf8_length(), '/');
5555 if (anon_last_slash == NULL) { // Unnamed package
5556 prepend_host_package_name(_host_klass, CHECK);
5557 } else {
5558 if (!InstanceKlass::is_same_class_package(_host_klass->class_loader(),
5559 _host_klass->name(),
5560 _host_klass->class_loader(),
5561 _class_name)) {
5562 ResourceMark rm(THREAD);
5563 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5564 err_msg("Host class %s and anonymous class %s are in different packages",
5565 _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5566 }
5567 }
5568 }
5569
5570 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5571 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5572 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5573 bool need_verify =
5574 // verifyAll
5575 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5576 // verifyRemote
5577 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5578 return !need_verify;
5579 }
5580
5581 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5582 Symbol* name,
5583 ClassLoaderData* loader_data,
5584 Handle protection_domain,
5585 const InstanceKlass* host_klass,
5586 GrowableArray<Handle>* cp_patches,
5587 Publicity pub_level,
5588 TRAPS) :
5589 _stream(stream),
5590 _requested_name(name),
5591 _loader_data(loader_data),
5592 _host_klass(host_klass),
5593 _cp_patches(cp_patches),
5594 _num_patched_klasses(0),
5595 _max_num_patched_klasses(0),
5596 _orig_cp_size(0),
5597 _first_patched_klass_resolved_index(0),
5598 _super_klass(),
5599 _cp(NULL),
5600 _fields(NULL),
5601 _methods(NULL),
5602 _inner_classes(NULL),
5603 _local_interfaces(NULL),
5604 _transitive_interfaces(NULL),
5605 _combined_annotations(NULL),
5606 _annotations(NULL),
5607 _type_annotations(NULL),
5608 _fields_annotations(NULL),
5609 _fields_type_annotations(NULL),
5610 _klass(NULL),
5611 _klass_to_deallocate(NULL),
5612 _parsed_annotations(NULL),
5613 _fac(NULL),
5614 _field_info(NULL),
5615 _method_ordering(NULL),
5616 _all_mirandas(NULL),
5617 _vtable_size(0),
5618 _itable_size(0),
5619 _num_miranda_methods(0),
5620 _rt(REF_NONE),
5621 _protection_domain(protection_domain),
5622 _access_flags(),
5623 _pub_level(pub_level),
5624 _bad_constant_seen(0),
5625 _synthetic_flag(false),
5626 _sde_length(false),
5627 _sde_buffer(NULL),
5628 _sourcefile_index(0),
5629 _generic_signature_index(0),
5630 _major_version(0),
5631 _minor_version(0),
5632 _this_class_index(0),
5633 _super_class_index(0),
5634 _itfs_len(0),
5635 _java_fields_count(0),
5636 _need_verify(false),
5637 _relax_verify(false),
5638 _has_nonstatic_concrete_methods(false),
5639 _declares_nonstatic_concrete_methods(false),
5640 _has_final_method(false),
5641 _has_finalizer(false),
5642 _has_empty_finalizer(false),
5643 _has_vanilla_constructor(false),
5644 _max_bootstrap_specifier_index(-1) {
5645
5646 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5647
5648 assert(THREAD->is_Java_thread(), "invariant");
5649 assert(_loader_data != NULL, "invariant");
5650 assert(stream != NULL, "invariant");
5651 assert(_stream != NULL, "invariant");
5652 assert(_stream->buffer() == _stream->current(), "invariant");
5653 assert(_class_name != NULL, "invariant");
5654 assert(0 == _access_flags.as_int(), "invariant");
5655
5656 // Figure out whether we can skip format checking (matching classic VM behavior)
5657 if (DumpSharedSpaces) {
5658 // verify == true means it's a 'remote' class (i.e., non-boot class)
5659 // Verification decision is based on BytecodeVerificationRemote flag
5660 // for those classes.
5661 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5662 BytecodeVerificationLocal;
5663 }
5664 else {
5665 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5666 stream->need_verify());
5667 }
5668 if (_cp_patches != NULL) {
5669 int len = _cp_patches->length();
5670 for (int i=0; i<len; i++) {
5671 if (has_cp_patch_at(i)) {
5672 Handle patch = cp_patch_at(i);
5673 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5674 // We need to append the names of the patched classes to the end of the constant pool,
5675 // because a patched class may have a Utf8 name that's not already included in the
5676 // original constant pool. These class names are used when patch_constant_pool()
5677 // calls patch_class().
5678 //
5679 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5680 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5681 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5682 _max_num_patched_klasses++;
5683 }
5684 }
5685 }
5686 }
5687
5688 // synch back verification state to stream
5689 stream->set_verify(_need_verify);
5690
5691 // Check if verification needs to be relaxed for this class file
5692 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5693 _relax_verify = relax_format_check_for(_loader_data);
5694
5695 parse_stream(stream, CHECK);
5696
5697 post_process_parsed_stream(stream, _cp, CHECK);
5698 }
5699
5700 void ClassFileParser::clear_class_metadata() {
5701 // metadata created before the instance klass is created. Must be
5702 // deallocated if classfile parsing returns an error.
5703 _cp = NULL;
5704 _fields = NULL;
5705 _methods = NULL;
5706 _inner_classes = NULL;
5707 _local_interfaces = NULL;
5708 _transitive_interfaces = NULL;
5709 _combined_annotations = NULL;
5710 _annotations = _type_annotations = NULL;
5711 _fields_annotations = _fields_type_annotations = NULL;
5712 }
5713
5714 // Destructor to clean up
5715 ClassFileParser::~ClassFileParser() {
5716 if (_cp != NULL) {
5717 MetadataFactory::free_metadata(_loader_data, _cp);
5718 }
5719 if (_fields != NULL) {
5720 MetadataFactory::free_array<u2>(_loader_data, _fields);
5721 }
5722
5723 if (_methods != NULL) {
5724 // Free methods
5725 InstanceKlass::deallocate_methods(_loader_data, _methods);
5726 }
5727
5728 // beware of the Universe::empty_blah_array!!
5729 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5730 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5731 }
5732
5733 // Free interfaces
5734 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5735 _local_interfaces, _transitive_interfaces);
5736
5737 if (_combined_annotations != NULL) {
5738 // After all annotations arrays have been created, they are installed into the
5739 // Annotations object that will be assigned to the InstanceKlass being created.
5740
5741 // Deallocate the Annotations object and the installed annotations arrays.
5742 _combined_annotations->deallocate_contents(_loader_data);
5743
5744 // If the _combined_annotations pointer is non-NULL,
5745 // then the other annotations fields should have been cleared.
5746 assert(_annotations == NULL, "Should have been cleared");
5747 assert(_type_annotations == NULL, "Should have been cleared");
5748 assert(_fields_annotations == NULL, "Should have been cleared");
5749 assert(_fields_type_annotations == NULL, "Should have been cleared");
5750 } else {
5751 // If the annotations arrays were not installed into the Annotations object,
5752 // then they have to be deallocated explicitly.
5753 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5754 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5755 Annotations::free_contents(_loader_data, _fields_annotations);
5756 Annotations::free_contents(_loader_data, _fields_type_annotations);
5757 }
5758
5759 clear_class_metadata();
5760
5761 // deallocate the klass if already created. Don't directly deallocate, but add
5762 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5763 // at a safepoint.
5764 if (_klass_to_deallocate != NULL) {
5765 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5766 }
5767 }
5768
5769 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5770 TRAPS) {
5771
5772 assert(stream != NULL, "invariant");
5773 assert(_class_name != NULL, "invariant");
5774
5775 // BEGIN STREAM PARSING
5776 stream->guarantee_more(8, CHECK); // magic, major, minor
5777 // Magic value
5778 const u4 magic = stream->get_u4_fast();
5779 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5780 "Incompatible magic value %u in class file %s",
5781 magic, CHECK);
5782
5783 // Version numbers
5784 _minor_version = stream->get_u2_fast();
5785 _major_version = stream->get_u2_fast();
5786
5787 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5788 ResourceMark rm;
5789 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5790 _major_version, _minor_version, _class_name->as_C_string());
5791 Exceptions::fthrow(
5792 THREAD_AND_LOCATION,
5793 vmSymbols::java_lang_UnsupportedClassVersionError(),
5794 "Unsupported major.minor version for dump time %u.%u",
5795 _major_version,
5796 _minor_version);
5797 }
5798
5799 // Check version numbers - we check this even with verifier off
5800 if (!is_supported_version(_major_version, _minor_version)) {
5801 ResourceMark rm(THREAD);
5802 Exceptions::fthrow(
5803 THREAD_AND_LOCATION,
5804 vmSymbols::java_lang_UnsupportedClassVersionError(),
5805 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5806 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
5807 _class_name->as_C_string(),
5808 _major_version,
5809 _minor_version,
5810 JAVA_MAX_SUPPORTED_VERSION,
5811 JAVA_MAX_SUPPORTED_MINOR_VERSION);
5812 return;
5813 }
5814
5815 stream->guarantee_more(3, CHECK); // length, first cp tag
5816 u2 cp_size = stream->get_u2_fast();
5817
5818 guarantee_property(
5819 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5820 cp_size, CHECK);
5821
5822 _orig_cp_size = cp_size;
5823 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
5824 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
5825 }
5826 cp_size += _max_num_patched_klasses;
5827
5828 _cp = ConstantPool::allocate(_loader_data,
5829 cp_size,
5830 CHECK);
5831
5832 ConstantPool* const cp = _cp;
5833
5834 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
5835
5836 assert(cp_size == (const u2)cp->length(), "invariant");
5837
5838 // ACCESS FLAGS
5839 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5840
5841 // Access flags
5842 jint flags;
5843 // JVM_ACC_MODULE is defined in JDK-9 and later.
5844 if (_major_version >= JAVA_9_VERSION) {
5845 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5846 } else {
5847 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5848 }
5849
5850 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5851 // Set abstract bit for old class files for backward compatibility
5852 flags |= JVM_ACC_ABSTRACT;
5853 }
5854
5855 verify_legal_class_modifiers(flags, CHECK);
5856
5857 short bad_constant = class_bad_constant_seen();
5858 if (bad_constant != 0) {
5859 // Do not throw CFE until after the access_flags are checked because if
5860 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5861 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
5862 }
5863
5864 _access_flags.set_flags(flags);
5865
5866 // This class and superclass
5867 _this_class_index = stream->get_u2_fast();
5868 check_property(
5869 valid_cp_range(_this_class_index, cp_size) &&
5870 cp->tag_at(_this_class_index).is_unresolved_klass(),
5871 "Invalid this class index %u in constant pool in class file %s",
5872 _this_class_index, CHECK);
5873
5874 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5875 assert(class_name_in_cp != NULL, "class_name can't be null");
5876
5877 // Update _class_name which could be null previously
5878 // to reflect the name in the constant pool
5879 _class_name = class_name_in_cp;
5880
5881 // Don't need to check whether this class name is legal or not.
5882 // It has been checked when constant pool is parsed.
5883 // However, make sure it is not an array type.
5884 if (_need_verify) {
5885 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
5886 "Bad class name in class file %s",
5887 CHECK);
5888 }
5889
5890 // Checks if name in class file matches requested name
5891 if (_requested_name != NULL && _requested_name != _class_name) {
5892 ResourceMark rm(THREAD);
5893 Exceptions::fthrow(
5894 THREAD_AND_LOCATION,
5895 vmSymbols::java_lang_NoClassDefFoundError(),
5896 "%s (wrong name: %s)",
5897 _class_name->as_C_string(),
5898 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
5899 );
5900 return;
5901 }
5902
5903 // if this is an anonymous class fix up its name if it's in the unnamed
5904 // package. Otherwise, throw IAE if it is in a different package than
5905 // its host class.
5906 if (_host_klass != NULL) {
5907 fix_anonymous_class_name(CHECK);
5908 }
5909
5910 // Verification prevents us from creating names with dots in them, this
5911 // asserts that that's the case.
5912 assert(is_internal_format(_class_name), "external class name format used internally");
5913
5914 if (!is_internal()) {
5915 if (log_is_enabled(Debug, class, preorder)){
5916 ResourceMark rm(THREAD);
5917 outputStream* log = Log(class, preorder)::debug_stream();
5918 log->print("%s", _class_name->as_klass_external_name());
5919 if (stream->source() != NULL) {
5920 log->print(" source: %s", stream->source());
5921 }
5922 log->cr();
5923 }
5924
5925 #if INCLUDE_CDS
5926 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5927 // Only dump the classes that can be stored into CDS archive.
5928 // Anonymous classes such as generated LambdaForm classes are also not included.
5929 if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
5930 _host_klass == NULL) {
5931 oop class_loader = _loader_data->class_loader();
5932 ResourceMark rm(THREAD);
5933 // For the boot and platform class loaders, check if the class is not found in the
5934 // java runtime image. Additional check for the boot class loader is if the class
5935 // is not found in the boot loader's appended entries. This indicates that the class
5936 // is not useable during run time, such as the ones found in the --patch-module entries,
5937 // so it should not be included in the classlist file.
5938 if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) ||
5939 SystemDictionary::is_platform_class_loader(class_loader)) &&
5940 !ClassLoader::is_jrt(stream->source())) {
5941 tty->print_cr("skip writing class %s from source %s to classlist file",
5942 _class_name->as_C_string(), stream->source());
5943 } else {
5944 classlist_file->print_cr("%s", _class_name->as_C_string());
5945 classlist_file->flush();
5946 }
5947 }
5948 }
5949 #endif
5950 }
5951
5952 // SUPERKLASS
5953 _super_class_index = stream->get_u2_fast();
5954 _super_klass = parse_super_class(cp,
5955 _super_class_index,
5956 _need_verify,
5957 CHECK);
5958
5959 // Interfaces
5960 _itfs_len = stream->get_u2_fast();
5961 parse_interfaces(stream,
5962 _itfs_len,
5963 cp,
5964 &_has_nonstatic_concrete_methods,
5965 CHECK);
5966
5967 assert(_local_interfaces != NULL, "invariant");
5968
5969 // Fields (offsets are filled in later)
5970 _fac = new FieldAllocationCount();
5971 parse_fields(stream,
5972 _access_flags.is_interface(),
5973 _fac,
5974 cp,
5975 cp_size,
5976 &_java_fields_count,
5977 CHECK);
5978
5979 assert(_fields != NULL, "invariant");
5980
5981 // Methods
5982 AccessFlags promoted_flags;
5983 parse_methods(stream,
5984 _access_flags.is_interface(),
5985 &promoted_flags,
5986 &_has_final_method,
5987 &_declares_nonstatic_concrete_methods,
5988 CHECK);
5989
5990 assert(_methods != NULL, "invariant");
5991
5992 // promote flags from parse_methods() to the klass' flags
5993 _access_flags.add_promoted_flags(promoted_flags.as_int());
5994
5995 if (_declares_nonstatic_concrete_methods) {
5996 _has_nonstatic_concrete_methods = true;
5997 }
5998
5999 // Additional attributes/annotations
6000 _parsed_annotations = new ClassAnnotationCollector();
6001 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6002
6003 assert(_inner_classes != NULL, "invariant");
6004
6005 // Finalize the Annotations metadata object,
6006 // now that all annotation arrays have been created.
6007 create_combined_annotations(CHECK);
6008
6009 // Make sure this is the end of class file stream
6010 guarantee_property(stream->at_eos(),
6011 "Extra bytes at the end of class file %s",
6012 CHECK);
6013
6014 // all bytes in stream read and parsed
6015 }
6016
6017 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6018 ConstantPool* cp,
6019 TRAPS) {
6020 assert(stream != NULL, "invariant");
6021 assert(stream->at_eos(), "invariant");
6022 assert(cp != NULL, "invariant");
6023 assert(_loader_data != NULL, "invariant");
6024
6025 if (_class_name == vmSymbols::java_lang_Object()) {
6026 check_property(_local_interfaces == Universe::the_empty_klass_array(),
6027 "java.lang.Object cannot implement an interface in class file %s",
6028 CHECK);
6029 }
6030 // We check super class after class file is parsed and format is checked
6031 if (_super_class_index > 0 && NULL ==_super_klass) {
6032 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6033 if (_access_flags.is_interface()) {
6034 // Before attempting to resolve the superclass, check for class format
6035 // errors not checked yet.
6036 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6037 "Interfaces must have java.lang.Object as superclass in class file %s",
6038 CHECK);
6039 }
6040 Handle loader(THREAD, _loader_data->class_loader());
6041 _super_klass = (const InstanceKlass*)
6042 SystemDictionary::resolve_super_or_fail(_class_name,
6043 super_class_name,
6044 loader,
6045 _protection_domain,
6046 true,
6047 CHECK);
6048 }
6049
6050 if (_super_klass != NULL) {
6051 if (_super_klass->has_nonstatic_concrete_methods()) {
6052 _has_nonstatic_concrete_methods = true;
6053 }
6054
6055 if (_super_klass->is_interface()) {
6056 ResourceMark rm(THREAD);
6057 Exceptions::fthrow(
6058 THREAD_AND_LOCATION,
6059 vmSymbols::java_lang_IncompatibleClassChangeError(),
6060 "class %s has interface %s as super class",
6061 _class_name->as_klass_external_name(),
6062 _super_klass->external_name()
6063 );
6064 return;
6065 }
6066 // Make sure super class is not final
6067 if (_super_klass->is_final()) {
6068 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6069 }
6070 }
6071
6072 // Compute the transitive list of all unique interfaces implemented by this class
6073 _transitive_interfaces =
6074 compute_transitive_interfaces(_super_klass,
6075 _local_interfaces,
6076 _loader_data,
6077 CHECK);
6078
6079 assert(_transitive_interfaces != NULL, "invariant");
6080
6081 // sort methods
6082 _method_ordering = sort_methods(_methods);
6083
6084 _all_mirandas = new GrowableArray<Method*>(20);
6085
6086 Handle loader(THREAD, _loader_data->class_loader());
6087 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6088 &_num_miranda_methods,
6089 _all_mirandas,
6090 _super_klass,
6091 _methods,
6092 _access_flags,
6093 _major_version,
6094 loader,
6095 _class_name,
6096 _local_interfaces,
6097 CHECK);
6098
6099 // Size of Java itable (in words)
6100 _itable_size = _access_flags.is_interface() ? 0 :
6101 klassItable::compute_itable_size(_transitive_interfaces);
6102
6103 assert(_fac != NULL, "invariant");
6104 assert(_parsed_annotations != NULL, "invariant");
6105
6106 _field_info = new FieldLayoutInfo();
6107 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6108
6109 // Compute reference typ
6110 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6111
6112 }
6113
6114 void ClassFileParser::set_klass(InstanceKlass* klass) {
6115
6116 #ifdef ASSERT
6117 if (klass != NULL) {
6118 assert(NULL == _klass, "leaking?");
6119 }
6120 #endif
6121
6122 _klass = klass;
6123 }
6124
6125 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6126
6127 #ifdef ASSERT
6128 if (klass != NULL) {
6129 assert(NULL == _klass_to_deallocate, "leaking?");
6130 }
6131 #endif
6132
6133 _klass_to_deallocate = klass;
6134 }
6135
6136 // Caller responsible for ResourceMark
6137 // clone stream with rewound position
6138 const ClassFileStream* ClassFileParser::clone_stream() const {
6139 assert(_stream != NULL, "invariant");
6140
6141 return _stream->clone();
6142 }
6143 // ----------------------------------------------------------------------------
6144 // debugging
6145
6146 #ifdef ASSERT
6147
6148 // return true if class_name contains no '.' (internal format is '/')
6149 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6150 if (class_name != NULL) {
6151 ResourceMark rm;
6152 char* name = class_name->as_C_string();
6153 return strchr(name, '.') == NULL;
6154 } else {
6155 return true;
6156 }
6157 }
6158
6159 #endif