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