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/exceptions.hpp"
68 #include "utilities/globalDefinitions.hpp"
69 #include "utilities/growableArray.hpp"
70 #include "utilities/macros.hpp"
71 #include "utilities/ostream.hpp"
72 #include "utilities/resourceHash.hpp"
73 #if INCLUDE_CDS
74 #include "classfile/systemDictionaryShared.hpp"
75 #endif
76
77 // We generally try to create the oops directly when parsing, rather than
78 // allocating temporary data structures and copying the bytes twice. A
79 // temporary area is only needed when parsing utf8 entries in the constant
80 // pool and when parsing line number tables.
81
82 // We add assert in debug mode when class format is not checked.
83
84 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
85 #define JAVA_MIN_SUPPORTED_VERSION 45
86 #define JAVA_MAX_SUPPORTED_VERSION 53
87 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
88
89 // Used for two backward compatibility reasons:
90 // - to check for new additions to the class file format in JDK1.5
91 // - to check for bug fixes in the format checker in JDK1.5
92 #define JAVA_1_5_VERSION 49
93
94 // Used for backward compatibility reasons:
95 // - to check for javac bug fixes that happened after 1.5
96 // - also used as the max version when running in jdk6
97 #define JAVA_6_VERSION 50
98
99 // Used for backward compatibility reasons:
100 // - to disallow argument and require ACC_STATIC for <clinit> methods
101 #define JAVA_7_VERSION 51
102
103 // Extension method support.
104 #define JAVA_8_VERSION 52
105
106 #define JAVA_9_VERSION 53
107
108 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
109 assert((bad_constant == 19 || bad_constant == 20) && _major_version >= JAVA_9_VERSION,
110 "Unexpected bad constant pool entry");
111 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
112 }
113
114 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
115 ConstantPool* cp,
116 const int length,
117 TRAPS) {
118 assert(stream != NULL, "invariant");
119 assert(cp != NULL, "invariant");
120
121 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
122 // this function (_current can be allocated in a register, with scalar
123 // replacement of aggregates). The _current pointer is copied back to
124 // stream() when this function returns. DON'T call another method within
125 // this method that uses stream().
126 const ClassFileStream cfs1 = *stream;
127 const ClassFileStream* const cfs = &cfs1;
128
129 assert(cfs->allocated_on_stack(), "should be local");
130 debug_only(const u1* const old_current = stream->current();)
131
132 // Used for batching symbol allocations.
133 const char* names[SymbolTable::symbol_alloc_batch_size];
134 int lengths[SymbolTable::symbol_alloc_batch_size];
135 int indices[SymbolTable::symbol_alloc_batch_size];
136 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
137 int names_count = 0;
138
139 // parsing Index 0 is unused
140 for (int index = 1; index < length; index++) {
141 // Each of the following case guarantees one more byte in the stream
142 // for the following tag or the access_flags following constant pool,
143 // so we don't need bounds-check for reading tag.
144 const u1 tag = cfs->get_u1_fast();
145 switch (tag) {
146 case JVM_CONSTANT_Class : {
147 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
148 const u2 name_index = cfs->get_u2_fast();
149 cp->klass_index_at_put(index, name_index);
150 break;
151 }
152 case JVM_CONSTANT_Fieldref: {
153 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
154 const u2 class_index = cfs->get_u2_fast();
155 const u2 name_and_type_index = cfs->get_u2_fast();
156 cp->field_at_put(index, class_index, name_and_type_index);
157 break;
158 }
159 case JVM_CONSTANT_Methodref: {
160 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
161 const u2 class_index = cfs->get_u2_fast();
162 const u2 name_and_type_index = cfs->get_u2_fast();
163 cp->method_at_put(index, class_index, name_and_type_index);
164 break;
165 }
166 case JVM_CONSTANT_InterfaceMethodref: {
167 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
168 const u2 class_index = cfs->get_u2_fast();
169 const u2 name_and_type_index = cfs->get_u2_fast();
170 cp->interface_method_at_put(index, class_index, name_and_type_index);
171 break;
172 }
173 case JVM_CONSTANT_String : {
174 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
175 const u2 string_index = cfs->get_u2_fast();
176 cp->string_index_at_put(index, string_index);
177 break;
178 }
179 case JVM_CONSTANT_MethodHandle :
180 case JVM_CONSTANT_MethodType: {
181 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
182 classfile_parse_error(
183 "Class file version does not support constant tag %u in class file %s",
184 tag, CHECK);
185 }
186 if (tag == JVM_CONSTANT_MethodHandle) {
187 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
188 const u1 ref_kind = cfs->get_u1_fast();
189 const u2 method_index = cfs->get_u2_fast();
190 cp->method_handle_index_at_put(index, ref_kind, method_index);
191 }
192 else if (tag == JVM_CONSTANT_MethodType) {
193 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
194 const u2 signature_index = cfs->get_u2_fast();
195 cp->method_type_index_at_put(index, signature_index);
196 }
197 else {
198 ShouldNotReachHere();
199 }
200 break;
201 }
202 case JVM_CONSTANT_InvokeDynamic : {
203 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
204 classfile_parse_error(
205 "Class file version does not support constant tag %u in class file %s",
206 tag, CHECK);
207 }
208 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
209 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
210 const u2 name_and_type_index = cfs->get_u2_fast();
211 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
212 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
213 }
214 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
215 break;
216 }
217 case JVM_CONSTANT_Integer: {
218 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
219 const u4 bytes = cfs->get_u4_fast();
220 cp->int_at_put(index, (jint)bytes);
221 break;
222 }
223 case JVM_CONSTANT_Float: {
224 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
225 const u4 bytes = cfs->get_u4_fast();
226 cp->float_at_put(index, *(jfloat*)&bytes);
227 break;
228 }
229 case JVM_CONSTANT_Long: {
230 // A mangled type might cause you to overrun allocated memory
231 guarantee_property(index + 1 < length,
232 "Invalid constant pool entry %u in class file %s",
233 index,
234 CHECK);
235 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
236 const u8 bytes = cfs->get_u8_fast();
237 cp->long_at_put(index, bytes);
238 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
239 break;
240 }
241 case JVM_CONSTANT_Double: {
242 // A mangled type might cause you to overrun allocated memory
243 guarantee_property(index+1 < length,
244 "Invalid constant pool entry %u in class file %s",
245 index,
246 CHECK);
247 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
248 const u8 bytes = cfs->get_u8_fast();
249 cp->double_at_put(index, *(jdouble*)&bytes);
250 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
251 break;
252 }
253 case JVM_CONSTANT_NameAndType: {
254 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
255 const u2 name_index = cfs->get_u2_fast();
256 const u2 signature_index = cfs->get_u2_fast();
257 cp->name_and_type_at_put(index, name_index, signature_index);
258 break;
259 }
260 case JVM_CONSTANT_Utf8 : {
261 cfs->guarantee_more(2, CHECK); // utf8_length
262 u2 utf8_length = cfs->get_u2_fast();
263 const u1* utf8_buffer = cfs->get_u1_buffer();
264 assert(utf8_buffer != NULL, "null utf8 buffer");
265 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
266 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
267 cfs->skip_u1_fast(utf8_length);
268
269 // Before storing the symbol, make sure it's legal
270 if (_need_verify) {
271 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
272 }
273
274 if (has_cp_patch_at(index)) {
275 Handle patch = clear_cp_patch_at(index);
276 guarantee_property(java_lang_String::is_instance(patch()),
277 "Illegal utf8 patch at %d in class file %s",
278 index,
279 CHECK);
280 const char* const str = java_lang_String::as_utf8_string(patch());
281 // (could use java_lang_String::as_symbol instead, but might as well batch them)
282 utf8_buffer = (const u1*) str;
283 utf8_length = (int) strlen(str);
284 }
285
286 unsigned int hash;
287 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
288 utf8_length,
289 hash);
290 if (result == NULL) {
291 names[names_count] = (const char*)utf8_buffer;
292 lengths[names_count] = utf8_length;
293 indices[names_count] = index;
294 hashValues[names_count++] = hash;
295 if (names_count == SymbolTable::symbol_alloc_batch_size) {
296 SymbolTable::new_symbols(_loader_data,
297 cp,
298 names_count,
299 names,
300 lengths,
301 indices,
302 hashValues,
303 CHECK);
304 names_count = 0;
305 }
306 } else {
307 cp->symbol_at_put(index, result);
308 }
309 break;
310 }
311 case 19:
312 case 20: {
313 // Record that an error occurred in these two cases but keep parsing so
314 // that ACC_Module can be checked for in the access_flags. Need to
315 // throw NoClassDefFoundError in that case.
316 if (_major_version >= JAVA_9_VERSION) {
317 cfs->guarantee_more(3, CHECK);
318 cfs->get_u2_fast();
319 set_class_bad_constant_seen(tag);
320 break;
321 }
322 }
323 default: {
324 classfile_parse_error("Unknown constant tag %u in class file %s",
325 tag,
326 CHECK);
327 break;
328 }
329 } // end of switch(tag)
330 } // end of for
331
332 // Allocate the remaining symbols
333 if (names_count > 0) {
334 SymbolTable::new_symbols(_loader_data,
335 cp,
336 names_count,
337 names,
338 lengths,
339 indices,
340 hashValues,
341 CHECK);
342 }
343
344 // Copy _current pointer of local copy back to stream.
345 assert(stream->current() == old_current, "non-exclusive use of stream");
346 stream->set_current(cfs1.current());
347
348 }
349
350 static inline bool valid_cp_range(int index, int length) {
351 return (index > 0 && index < length);
352 }
353
354 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
355 assert(cp != NULL, "invariant");
356 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
357 return cp->symbol_at(index);
358 }
359 return NULL;
360 }
361
362 #ifdef ASSERT
363 PRAGMA_DIAG_PUSH
364 PRAGMA_FORMAT_NONLITERAL_IGNORED
365 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
366 ResourceMark rm(THREAD);
367 fatal(msg, _class_name->as_C_string());
368 }
369
370 void ClassFileParser::report_assert_property_failure(const char* msg,
371 int index,
372 TRAPS) const {
373 ResourceMark rm(THREAD);
374 fatal(msg, index, _class_name->as_C_string());
375 }
376 PRAGMA_DIAG_POP
377 #endif
378
379 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
380 ConstantPool* const cp,
381 const int length,
382 TRAPS) {
383 assert(cp != NULL, "invariant");
384 assert(stream != NULL, "invariant");
385
386 // parsing constant pool entries
387 parse_constant_pool_entries(stream, cp, length, CHECK);
388 if (class_bad_constant_seen() != 0) {
389 // a bad CP entry has been detected previously so stop parsing and just return.
390 return;
391 }
392
393 int index = 1; // declared outside of loops for portability
394 int num_klasses = 0;
395
396 // first verification pass - validate cross references
397 // and fixup class and string constants
398 for (index = 1; index < length; index++) { // Index 0 is unused
399 const jbyte tag = cp->tag_at(index).value();
400 switch (tag) {
401 case JVM_CONSTANT_Class: {
402 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
403 break;
404 }
405 case JVM_CONSTANT_Fieldref:
406 // fall through
407 case JVM_CONSTANT_Methodref:
408 // fall through
409 case JVM_CONSTANT_InterfaceMethodref: {
410 if (!_need_verify) break;
411 const int klass_ref_index = cp->klass_ref_index_at(index);
412 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
413 check_property(valid_klass_reference_at(klass_ref_index),
414 "Invalid constant pool index %u in class file %s",
415 klass_ref_index, CHECK);
416 check_property(valid_cp_range(name_and_type_ref_index, length) &&
417 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
418 "Invalid constant pool index %u in class file %s",
419 name_and_type_ref_index, CHECK);
420 break;
421 }
422 case JVM_CONSTANT_String: {
423 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
424 break;
425 }
426 case JVM_CONSTANT_Integer:
427 break;
428 case JVM_CONSTANT_Float:
429 break;
430 case JVM_CONSTANT_Long:
431 case JVM_CONSTANT_Double: {
432 index++;
433 check_property(
434 (index < length && cp->tag_at(index).is_invalid()),
435 "Improper constant pool long/double index %u in class file %s",
436 index, CHECK);
437 break;
438 }
439 case JVM_CONSTANT_NameAndType: {
440 if (!_need_verify) break;
441 const int name_ref_index = cp->name_ref_index_at(index);
442 const int signature_ref_index = cp->signature_ref_index_at(index);
443 check_property(valid_symbol_at(name_ref_index),
444 "Invalid constant pool index %u in class file %s",
445 name_ref_index, CHECK);
446 check_property(valid_symbol_at(signature_ref_index),
447 "Invalid constant pool index %u in class file %s",
448 signature_ref_index, CHECK);
449 break;
450 }
451 case JVM_CONSTANT_Utf8:
452 break;
453 case JVM_CONSTANT_UnresolvedClass: // fall-through
454 case JVM_CONSTANT_UnresolvedClassInError: {
455 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
456 break;
457 }
458 case JVM_CONSTANT_ClassIndex: {
459 const int class_index = cp->klass_index_at(index);
460 check_property(valid_symbol_at(class_index),
461 "Invalid constant pool index %u in class file %s",
462 class_index, CHECK);
463 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
464 break;
465 }
466 case JVM_CONSTANT_StringIndex: {
467 const int string_index = cp->string_index_at(index);
468 check_property(valid_symbol_at(string_index),
469 "Invalid constant pool index %u in class file %s",
470 string_index, CHECK);
471 Symbol* const sym = cp->symbol_at(string_index);
472 cp->unresolved_string_at_put(index, sym);
473 break;
474 }
475 case JVM_CONSTANT_MethodHandle: {
476 const int ref_index = cp->method_handle_index_at(index);
477 check_property(valid_cp_range(ref_index, length),
478 "Invalid constant pool index %u in class file %s",
479 ref_index, CHECK);
480 const constantTag tag = cp->tag_at(ref_index);
481 const int ref_kind = cp->method_handle_ref_kind_at(index);
482
483 switch (ref_kind) {
484 case JVM_REF_getField:
485 case JVM_REF_getStatic:
486 case JVM_REF_putField:
487 case JVM_REF_putStatic: {
488 check_property(
489 tag.is_field(),
490 "Invalid constant pool index %u in class file %s (not a field)",
491 ref_index, CHECK);
492 break;
493 }
494 case JVM_REF_invokeVirtual:
495 case JVM_REF_newInvokeSpecial: {
496 check_property(
497 tag.is_method(),
498 "Invalid constant pool index %u in class file %s (not a method)",
499 ref_index, CHECK);
500 break;
501 }
502 case JVM_REF_invokeStatic:
503 case JVM_REF_invokeSpecial: {
504 check_property(
505 tag.is_method() ||
506 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
507 "Invalid constant pool index %u in class file %s (not a method)",
508 ref_index, CHECK);
509 break;
510 }
511 case JVM_REF_invokeInterface: {
512 check_property(
513 tag.is_interface_method(),
514 "Invalid constant pool index %u in class file %s (not an interface method)",
515 ref_index, CHECK);
516 break;
517 }
518 default: {
519 classfile_parse_error(
520 "Bad method handle kind at constant pool index %u in class file %s",
521 index, CHECK);
522 }
523 } // switch(refkind)
524 // Keep the ref_index unchanged. It will be indirected at link-time.
525 break;
526 } // case MethodHandle
527 case JVM_CONSTANT_MethodType: {
528 const int ref_index = cp->method_type_index_at(index);
529 check_property(valid_symbol_at(ref_index),
530 "Invalid constant pool index %u in class file %s",
531 ref_index, CHECK);
532 break;
533 }
534 case JVM_CONSTANT_InvokeDynamic: {
535 const int name_and_type_ref_index =
536 cp->invoke_dynamic_name_and_type_ref_index_at(index);
537
538 check_property(valid_cp_range(name_and_type_ref_index, length) &&
539 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
540 "Invalid constant pool index %u in class file %s",
541 name_and_type_ref_index, CHECK);
542 // bootstrap specifier index must be checked later,
543 // when BootstrapMethods attr is available
544 break;
545 }
546 default: {
547 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
548 ShouldNotReachHere();
549 break;
550 }
551 } // switch(tag)
552 } // end of for
553
554 _first_patched_klass_resolved_index = num_klasses;
555 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
556
557 if (_cp_patches != NULL) {
558 // need to treat this_class specially...
559
560 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
561 // for now. These will be replaced with actual names of the patched classes in patch_class().
562 Symbol* s = vmSymbols::star_name();
563 for (int n=_orig_cp_size; n<cp->length(); n++) {
564 cp->symbol_at_put(n, s);
565 }
566
567 int this_class_index;
568 {
569 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
570 const u1* const mark = stream->current();
571 stream->skip_u2_fast(1); // skip flags
572 this_class_index = stream->get_u2_fast();
573 stream->set_current(mark); // revert to mark
574 }
575
576 for (index = 1; index < length; index++) { // Index 0 is unused
577 if (has_cp_patch_at(index)) {
578 guarantee_property(index != this_class_index,
579 "Illegal constant pool patch to self at %d in class file %s",
580 index, CHECK);
581 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
582 }
583 }
584 }
585
586 if (!_need_verify) {
587 return;
588 }
589
590 // second verification pass - checks the strings are of the right format.
591 // but not yet to the other entries
592 for (index = 1; index < length; index++) {
593 const jbyte tag = cp->tag_at(index).value();
594 switch (tag) {
595 case JVM_CONSTANT_UnresolvedClass: {
596 const Symbol* const class_name = cp->klass_name_at(index);
597 // check the name, even if _cp_patches will overwrite it
598 verify_legal_class_name(class_name, CHECK);
599 break;
600 }
601 case JVM_CONSTANT_NameAndType: {
602 if (_need_verify) {
603 const int sig_index = cp->signature_ref_index_at(index);
604 const int name_index = cp->name_ref_index_at(index);
605 const Symbol* const name = cp->symbol_at(name_index);
606 const Symbol* const sig = cp->symbol_at(sig_index);
607 guarantee_property(sig->utf8_length() != 0,
608 "Illegal zero length constant pool entry at %d in class %s",
609 sig_index, CHECK);
610 guarantee_property(name->utf8_length() != 0,
611 "Illegal zero length constant pool entry at %d in class %s",
612 name_index, CHECK);
613
614 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
615 // Format check method name and signature
616 verify_legal_method_name(name, CHECK);
617 verify_legal_method_signature(name, sig, CHECK);
618 } else {
619 // Format check field name and signature
620 verify_legal_field_name(name, CHECK);
621 verify_legal_field_signature(name, sig, CHECK);
622 }
623 }
624 break;
625 }
626 case JVM_CONSTANT_InvokeDynamic:
627 case JVM_CONSTANT_Fieldref:
628 case JVM_CONSTANT_Methodref:
629 case JVM_CONSTANT_InterfaceMethodref: {
630 const int name_and_type_ref_index =
631 cp->name_and_type_ref_index_at(index);
632 // already verified to be utf8
633 const int name_ref_index =
634 cp->name_ref_index_at(name_and_type_ref_index);
635 // already verified to be utf8
636 const int signature_ref_index =
637 cp->signature_ref_index_at(name_and_type_ref_index);
638 const Symbol* const name = cp->symbol_at(name_ref_index);
639 const Symbol* const signature = cp->symbol_at(signature_ref_index);
640 if (tag == JVM_CONSTANT_Fieldref) {
641 if (_need_verify) {
642 // Field name and signature are verified above, when iterating NameAndType_info.
643 // Need only to be sure signature is non-zero length and the right type.
644 if (signature->utf8_length() == 0 ||
645 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
646 throwIllegalSignature("Field", name, signature, CHECK);
647 }
648 }
649 } else {
650 if (_need_verify) {
651 // Method name and signature are verified above, when iterating NameAndType_info.
652 // Need only to be sure signature is non-zero length and the right type.
653 if (signature->utf8_length() == 0 ||
654 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
655 throwIllegalSignature("Method", name, signature, CHECK);
656 }
657 }
658 // 4509014: If a class method name begins with '<', it must be "<init>"
659 const unsigned int name_len = name->utf8_length();
660 if (tag == JVM_CONSTANT_Methodref &&
661 name_len != 0 &&
662 name->byte_at(0) == '<' &&
663 name != vmSymbols::object_initializer_name()) {
664 classfile_parse_error(
665 "Bad method name at constant pool index %u in class file %s",
666 name_ref_index, CHECK);
667 }
668 }
669 break;
670 }
671 case JVM_CONSTANT_MethodHandle: {
672 const int ref_index = cp->method_handle_index_at(index);
673 const int ref_kind = cp->method_handle_ref_kind_at(index);
674 switch (ref_kind) {
675 case JVM_REF_invokeVirtual:
676 case JVM_REF_invokeStatic:
677 case JVM_REF_invokeSpecial:
678 case JVM_REF_newInvokeSpecial: {
679 const int name_and_type_ref_index =
680 cp->name_and_type_ref_index_at(ref_index);
681 const int name_ref_index =
682 cp->name_ref_index_at(name_and_type_ref_index);
683 const Symbol* const name = cp->symbol_at(name_ref_index);
684 if (ref_kind == JVM_REF_newInvokeSpecial) {
685 if (name != vmSymbols::object_initializer_name()) {
686 classfile_parse_error(
687 "Bad constructor name at constant pool index %u in class file %s",
688 name_ref_index, CHECK);
689 }
690 } else {
691 if (name == vmSymbols::object_initializer_name()) {
692 classfile_parse_error(
693 "Bad method name at constant pool index %u in class file %s",
694 name_ref_index, CHECK);
695 }
696 }
697 break;
698 }
699 // Other ref_kinds are already fully checked in previous pass.
700 } // switch(ref_kind)
701 break;
702 }
703 case JVM_CONSTANT_MethodType: {
704 const Symbol* const no_name = vmSymbols::type_name(); // place holder
705 const Symbol* const signature = cp->method_type_signature_at(index);
706 verify_legal_method_signature(no_name, signature, CHECK);
707 break;
708 }
709 case JVM_CONSTANT_Utf8: {
710 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
711 }
712 } // switch(tag)
713 } // end of for
714 }
715
716 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
717 int name_index = _orig_cp_size + _num_patched_klasses;
718 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
719
720 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
721 _num_patched_klasses ++;
722 }
723
724 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
725 int index,
726 Handle patch,
727 TRAPS) {
728 assert(cp != NULL, "invariant");
729
730 BasicType patch_type = T_VOID;
731
732 switch (cp->tag_at(index).value()) {
733
734 case JVM_CONSTANT_UnresolvedClass: {
735 // Patching a class means pre-resolving it.
736 // The name in the constant pool is ignored.
737 if (java_lang_Class::is_instance(patch())) {
738 guarantee_property(!java_lang_Class::is_primitive(patch()),
739 "Illegal class patch at %d in class file %s",
740 index, CHECK);
741 Klass* k = java_lang_Class::as_Klass(patch());
742 patch_class(cp, index, k, k->name());
743 } else {
744 guarantee_property(java_lang_String::is_instance(patch()),
745 "Illegal class patch at %d in class file %s",
746 index, CHECK);
747 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
748 patch_class(cp, index, NULL, name);
749 }
750 break;
751 }
752
753 case JVM_CONSTANT_String: {
754 // skip this patch and don't clear it. Needs the oop array for resolved
755 // references to be created first.
756 return;
757 }
758 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
759 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
760 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
761 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
762 patch_prim:
763 {
764 jvalue value;
765 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
766 guarantee_property(value_type == patch_type,
767 "Illegal primitive patch at %d in class file %s",
768 index, CHECK);
769 switch (value_type) {
770 case T_INT: cp->int_at_put(index, value.i); break;
771 case T_FLOAT: cp->float_at_put(index, value.f); break;
772 case T_LONG: cp->long_at_put(index, value.j); break;
773 case T_DOUBLE: cp->double_at_put(index, value.d); break;
774 default: assert(false, "");
775 }
776 } // end patch_prim label
777 break;
778
779 default: {
780 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
781 guarantee_property(!has_cp_patch_at(index),
782 "Illegal unexpected patch at %d in class file %s",
783 index, CHECK);
784 return;
785 }
786 } // end of switch(tag)
787
788 // On fall-through, mark the patch as used.
789 clear_cp_patch_at(index);
790 }
791 class NameSigHash: public ResourceObj {
792 public:
793 const Symbol* _name; // name
794 const Symbol* _sig; // signature
795 NameSigHash* _next; // Next entry in hash table
796 };
797
798 static const int HASH_ROW_SIZE = 256;
799
800 static unsigned int hash(const Symbol* name, const Symbol* sig) {
801 unsigned int raw_hash = 0;
802 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
803 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
804
805 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
806 }
807
808
809 static void initialize_hashtable(NameSigHash** table) {
810 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
811 }
812 // Return false if the name/sig combination is found in table.
813 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
814 // The old format checker uses heap sort to find duplicates.
815 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
816 // of table since we don't expect Symbol*'s to move.
817 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
818 assert(name != NULL, "name in constant pool is NULL");
819
820 // First lookup for duplicates
821 int index = hash(name, sig);
822 NameSigHash* entry = table[index];
823 while (entry != NULL) {
824 if (entry->_name == name && entry->_sig == sig) {
825 return false;
826 }
827 entry = entry->_next;
828 }
829
830 // No duplicate is found, allocate a new entry and fill it.
831 entry = new NameSigHash();
832 entry->_name = name;
833 entry->_sig = sig;
834
835 // Insert into hash table
836 entry->_next = table[index];
837 table[index] = entry;
838
839 return true;
840 }
841
842 // Side-effects: populates the _local_interfaces field
843 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
844 const int itfs_len,
845 ConstantPool* const cp,
846 bool* const has_nonstatic_concrete_methods,
847 TRAPS) {
848 assert(stream != NULL, "invariant");
849 assert(cp != NULL, "invariant");
850 assert(has_nonstatic_concrete_methods != NULL, "invariant");
851
852 if (itfs_len == 0) {
853 _local_interfaces = Universe::the_empty_klass_array();
854 } else {
855 assert(itfs_len > 0, "only called for len>0");
856 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
857
858 int index;
859 for (index = 0; index < itfs_len; index++) {
860 const u2 interface_index = stream->get_u2(CHECK);
861 Klass* interf;
862 check_property(
863 valid_klass_reference_at(interface_index),
864 "Interface name has bad constant pool index %u in class file %s",
865 interface_index, CHECK);
866 if (cp->tag_at(interface_index).is_klass()) {
867 interf = cp->resolved_klass_at(interface_index);
868 } else {
869 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
870
871 // Don't need to check legal name because it's checked when parsing constant pool.
872 // But need to make sure it's not an array type.
873 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
874 "Bad interface name in class file %s", CHECK);
875
876 // Call resolve_super so classcircularity is checked
877 interf = SystemDictionary::resolve_super_or_fail(
878 _class_name,
879 unresolved_klass,
880 Handle(THREAD, _loader_data->class_loader()),
881 _protection_domain,
882 false,
883 CHECK);
884 }
885
886 if (!interf->is_interface()) {
887 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
888 "Implementing class");
889 }
890
891 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
892 *has_nonstatic_concrete_methods = true;
893 }
894 _local_interfaces->at_put(index, interf);
895 }
896
897 if (!_need_verify || itfs_len <= 1) {
898 return;
899 }
900
901 // Check if there's any duplicates in interfaces
902 ResourceMark rm(THREAD);
903 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
904 NameSigHash*,
905 HASH_ROW_SIZE);
906 initialize_hashtable(interface_names);
907 bool dup = false;
908 const Symbol* name = NULL;
909 {
910 debug_only(NoSafepointVerifier nsv;)
911 for (index = 0; index < itfs_len; index++) {
912 const Klass* const k = _local_interfaces->at(index);
913 name = InstanceKlass::cast(k)->name();
914 // If no duplicates, add (name, NULL) in hashtable interface_names.
915 if (!put_after_lookup(name, NULL, interface_names)) {
916 dup = true;
917 break;
918 }
919 }
920 }
921 if (dup) {
922 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
923 name->as_C_string(), CHECK);
924 }
925 }
926 }
927
928 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
929 int constantvalue_index,
930 int signature_index,
931 TRAPS) const {
932 // Make sure the constant pool entry is of a type appropriate to this field
933 guarantee_property(
934 (constantvalue_index > 0 &&
935 constantvalue_index < cp->length()),
936 "Bad initial value index %u in ConstantValue attribute in class file %s",
937 constantvalue_index, CHECK);
938
939 const constantTag value_type = cp->tag_at(constantvalue_index);
940 switch(cp->basic_type_for_signature_at(signature_index)) {
941 case T_LONG: {
942 guarantee_property(value_type.is_long(),
943 "Inconsistent constant value type in class file %s",
944 CHECK);
945 break;
946 }
947 case T_FLOAT: {
948 guarantee_property(value_type.is_float(),
949 "Inconsistent constant value type in class file %s",
950 CHECK);
951 break;
952 }
953 case T_DOUBLE: {
954 guarantee_property(value_type.is_double(),
955 "Inconsistent constant value type in class file %s",
956 CHECK);
957 break;
958 }
959 case T_BYTE:
960 case T_CHAR:
961 case T_SHORT:
962 case T_BOOLEAN:
963 case T_INT: {
964 guarantee_property(value_type.is_int(),
965 "Inconsistent constant value type in class file %s",
966 CHECK);
967 break;
968 }
969 case T_OBJECT: {
970 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
971 && value_type.is_string()),
972 "Bad string initial value in class file %s",
973 CHECK);
974 break;
975 }
976 default: {
977 classfile_parse_error("Unable to set initial value %u in class file %s",
978 constantvalue_index,
979 CHECK);
980 }
981 }
982 }
983
984 class AnnotationCollector : public ResourceObj{
985 public:
986 enum Location { _in_field, _in_method, _in_class };
987 enum ID {
988 _unknown = 0,
989 _method_CallerSensitive,
990 _method_ForceInline,
991 _method_DontInline,
992 _method_InjectedProfile,
993 _method_LambdaForm_Compiled,
994 _method_LambdaForm_Hidden,
995 _method_HotSpotIntrinsicCandidate,
996 _jdk_internal_vm_annotation_Contended,
997 _field_Stable,
998 _jdk_internal_vm_annotation_ReservedStackAccess,
999 _annotation_LIMIT
1000 };
1001 const Location _location;
1002 int _annotations_present;
1003 u2 _contended_group;
1004
1005 AnnotationCollector(Location location)
1006 : _location(location), _annotations_present(0)
1007 {
1008 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1009 }
1010 // If this annotation name has an ID, report it (or _none).
1011 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1012 // Set the annotation name:
1013 void set_annotation(ID id) {
1014 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1015 _annotations_present |= nth_bit((int)id);
1016 }
1017
1018 void remove_annotation(ID id) {
1019 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1020 _annotations_present &= ~nth_bit((int)id);
1021 }
1022
1023 // Report if the annotation is present.
1024 bool has_any_annotations() const { return _annotations_present != 0; }
1025 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1026
1027 void set_contended_group(u2 group) { _contended_group = group; }
1028 u2 contended_group() const { return _contended_group; }
1029
1030 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1031
1032 void set_stable(bool stable) { set_annotation(_field_Stable); }
1033 bool is_stable() const { return has_annotation(_field_Stable); }
1034 };
1035
1036 // This class also doubles as a holder for metadata cleanup.
1037 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1038 private:
1039 ClassLoaderData* _loader_data;
1040 AnnotationArray* _field_annotations;
1041 AnnotationArray* _field_type_annotations;
1042 public:
1043 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1044 AnnotationCollector(_in_field),
1045 _loader_data(loader_data),
1046 _field_annotations(NULL),
1047 _field_type_annotations(NULL) {}
1048 ~FieldAnnotationCollector();
1049 void apply_to(FieldInfo* f);
1050 AnnotationArray* field_annotations() { return _field_annotations; }
1051 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1052
1053 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1054 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1055 };
1056
1057 class MethodAnnotationCollector : public AnnotationCollector{
1058 public:
1059 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1060 void apply_to(methodHandle m);
1061 };
1062
1063 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1064 public:
1065 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1066 void apply_to(InstanceKlass* ik);
1067 };
1068
1069
1070 static int skip_annotation_value(const u1*, int, int); // fwd decl
1071
1072 // Safely increment index by val if does not pass limit
1073 #define SAFE_ADD(index, limit, val) \
1074 if (index >= limit - val) return limit; \
1075 index += val;
1076
1077 // Skip an annotation. Return >=limit if there is any problem.
1078 static int skip_annotation(const u1* buffer, int limit, int index) {
1079 assert(buffer != NULL, "invariant");
1080 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1081 // value := switch (tag:u1) { ... }
1082 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1083 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1084 while (--nmem >= 0 && index < limit) {
1085 SAFE_ADD(index, limit, 2); // skip member
1086 index = skip_annotation_value(buffer, limit, index);
1087 }
1088 return index;
1089 }
1090
1091 // Skip an annotation value. Return >=limit if there is any problem.
1092 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1093 assert(buffer != NULL, "invariant");
1094
1095 // value := switch (tag:u1) {
1096 // case B, C, I, S, Z, D, F, J, c: con:u2;
1097 // case e: e_class:u2 e_name:u2;
1098 // case s: s_con:u2;
1099 // case [: do(nval:u2) {value};
1100 // case @: annotation;
1101 // case s: s_con:u2;
1102 // }
1103 SAFE_ADD(index, limit, 1); // read tag
1104 const u1 tag = buffer[index - 1];
1105 switch (tag) {
1106 case 'B':
1107 case 'C':
1108 case 'I':
1109 case 'S':
1110 case 'Z':
1111 case 'D':
1112 case 'F':
1113 case 'J':
1114 case 'c':
1115 case 's':
1116 SAFE_ADD(index, limit, 2); // skip con or s_con
1117 break;
1118 case 'e':
1119 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1120 break;
1121 case '[':
1122 {
1123 SAFE_ADD(index, limit, 2); // read nval
1124 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1125 while (--nval >= 0 && index < limit) {
1126 index = skip_annotation_value(buffer, limit, index);
1127 }
1128 }
1129 break;
1130 case '@':
1131 index = skip_annotation(buffer, limit, index);
1132 break;
1133 default:
1134 return limit; // bad tag byte
1135 }
1136 return index;
1137 }
1138
1139 // Sift through annotations, looking for those significant to the VM:
1140 static void parse_annotations(const ConstantPool* const cp,
1141 const u1* buffer, int limit,
1142 AnnotationCollector* coll,
1143 ClassLoaderData* loader_data,
1144 TRAPS) {
1145
1146 assert(cp != NULL, "invariant");
1147 assert(buffer != NULL, "invariant");
1148 assert(coll != NULL, "invariant");
1149 assert(loader_data != NULL, "invariant");
1150
1151 // annotations := do(nann:u2) {annotation}
1152 int index = 2; // read nann
1153 if (index >= limit) return;
1154 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1155 enum { // initial annotation layout
1156 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1157 count_off = 2, // u2 such as 1 (one value)
1158 member_off = 4, // utf8 such as 'value'
1159 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1160 e_tag_val = 'e',
1161 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1162 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1163 e_size = 11, // end of 'e' annotation
1164 c_tag_val = 'c', // payload is type
1165 c_con_off = 7, // utf8 payload, such as 'I'
1166 c_size = 9, // end of 'c' annotation
1167 s_tag_val = 's', // payload is String
1168 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1169 s_size = 9,
1170 min_size = 6 // smallest possible size (zero members)
1171 };
1172 // Cannot add min_size to index in case of overflow MAX_INT
1173 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1174 int index0 = index;
1175 index = skip_annotation(buffer, limit, index);
1176 const u1* const abase = buffer + index0;
1177 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1178 const int count = Bytes::get_Java_u2((address)abase + count_off);
1179 const Symbol* const aname = check_symbol_at(cp, atype);
1180 if (aname == NULL) break; // invalid annotation name
1181 const Symbol* member = NULL;
1182 if (count >= 1) {
1183 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1184 member = check_symbol_at(cp, member_index);
1185 if (member == NULL) break; // invalid member name
1186 }
1187
1188 // Here is where parsing particular annotations will take place.
1189 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1190 if (AnnotationCollector::_unknown == id) continue;
1191 coll->set_annotation(id);
1192
1193 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1194 // @Contended can optionally specify the contention group.
1195 //
1196 // Contended group defines the equivalence class over the fields:
1197 // the fields within the same contended group are not treated distinct.
1198 // The only exception is default group, which does not incur the
1199 // equivalence. Naturally, contention group for classes is meaningless.
1200 //
1201 // While the contention group is specified as String, annotation
1202 // values are already interned, and we might as well use the constant
1203 // pool index as the group tag.
1204 //
1205 u2 group_index = 0; // default contended group
1206 if (count == 1
1207 && s_size == (index - index0) // match size
1208 && s_tag_val == *(abase + tag_off)
1209 && member == vmSymbols::value_name()) {
1210 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1211 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1212 group_index = 0; // default contended group
1213 }
1214 }
1215 coll->set_contended_group(group_index);
1216 }
1217 }
1218 }
1219
1220
1221 // Parse attributes for a field.
1222 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1223 u2 attributes_count,
1224 bool is_static, u2 signature_index,
1225 u2* const constantvalue_index_addr,
1226 bool* const is_synthetic_addr,
1227 u2* const generic_signature_index_addr,
1228 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1229 TRAPS) {
1230 assert(cfs != NULL, "invariant");
1231 assert(constantvalue_index_addr != NULL, "invariant");
1232 assert(is_synthetic_addr != NULL, "invariant");
1233 assert(generic_signature_index_addr != NULL, "invariant");
1234 assert(parsed_annotations != NULL, "invariant");
1235 assert(attributes_count > 0, "attributes_count should be greater than 0");
1236
1237 u2 constantvalue_index = 0;
1238 u2 generic_signature_index = 0;
1239 bool is_synthetic = false;
1240 const u1* runtime_visible_annotations = NULL;
1241 int runtime_visible_annotations_length = 0;
1242 const u1* runtime_invisible_annotations = NULL;
1243 int runtime_invisible_annotations_length = 0;
1244 const u1* runtime_visible_type_annotations = NULL;
1245 int runtime_visible_type_annotations_length = 0;
1246 const u1* runtime_invisible_type_annotations = NULL;
1247 int runtime_invisible_type_annotations_length = 0;
1248 bool runtime_invisible_annotations_exists = false;
1249 bool runtime_invisible_type_annotations_exists = false;
1250 const ConstantPool* const cp = _cp;
1251
1252 while (attributes_count--) {
1253 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1254 const u2 attribute_name_index = cfs->get_u2_fast();
1255 const u4 attribute_length = cfs->get_u4_fast();
1256 check_property(valid_symbol_at(attribute_name_index),
1257 "Invalid field attribute index %u in class file %s",
1258 attribute_name_index,
1259 CHECK);
1260
1261 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1262 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1263 // ignore if non-static
1264 if (constantvalue_index != 0) {
1265 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1266 }
1267 check_property(
1268 attribute_length == 2,
1269 "Invalid ConstantValue field attribute length %u in class file %s",
1270 attribute_length, CHECK);
1271
1272 constantvalue_index = cfs->get_u2(CHECK);
1273 if (_need_verify) {
1274 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1275 }
1276 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1277 if (attribute_length != 0) {
1278 classfile_parse_error(
1279 "Invalid Synthetic field attribute length %u in class file %s",
1280 attribute_length, CHECK);
1281 }
1282 is_synthetic = true;
1283 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1284 if (attribute_length != 0) {
1285 classfile_parse_error(
1286 "Invalid Deprecated field attribute length %u in class file %s",
1287 attribute_length, CHECK);
1288 }
1289 } else if (_major_version >= JAVA_1_5_VERSION) {
1290 if (attribute_name == vmSymbols::tag_signature()) {
1291 if (generic_signature_index != 0) {
1292 classfile_parse_error(
1293 "Multiple Signature attributes for field in class file %s", CHECK);
1294 }
1295 if (attribute_length != 2) {
1296 classfile_parse_error(
1297 "Wrong size %u for field's Signature attribute in class file %s",
1298 attribute_length, CHECK);
1299 }
1300 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1301 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1302 if (runtime_visible_annotations != NULL) {
1303 classfile_parse_error(
1304 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1305 }
1306 runtime_visible_annotations_length = attribute_length;
1307 runtime_visible_annotations = cfs->get_u1_buffer();
1308 assert(runtime_visible_annotations != NULL, "null visible annotations");
1309 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1310 parse_annotations(cp,
1311 runtime_visible_annotations,
1312 runtime_visible_annotations_length,
1313 parsed_annotations,
1314 _loader_data,
1315 CHECK);
1316 cfs->skip_u1_fast(runtime_visible_annotations_length);
1317 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1318 if (runtime_invisible_annotations_exists) {
1319 classfile_parse_error(
1320 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1321 }
1322 runtime_invisible_annotations_exists = true;
1323 if (PreserveAllAnnotations) {
1324 runtime_invisible_annotations_length = attribute_length;
1325 runtime_invisible_annotations = cfs->get_u1_buffer();
1326 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1327 }
1328 cfs->skip_u1(attribute_length, CHECK);
1329 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1330 if (runtime_visible_type_annotations != NULL) {
1331 classfile_parse_error(
1332 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1333 }
1334 runtime_visible_type_annotations_length = attribute_length;
1335 runtime_visible_type_annotations = cfs->get_u1_buffer();
1336 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1337 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1338 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1339 if (runtime_invisible_type_annotations_exists) {
1340 classfile_parse_error(
1341 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1342 } else {
1343 runtime_invisible_type_annotations_exists = true;
1344 }
1345 if (PreserveAllAnnotations) {
1346 runtime_invisible_type_annotations_length = attribute_length;
1347 runtime_invisible_type_annotations = cfs->get_u1_buffer();
1348 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1349 }
1350 cfs->skip_u1(attribute_length, CHECK);
1351 } else {
1352 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1353 }
1354 } else {
1355 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1356 }
1357 }
1358
1359 *constantvalue_index_addr = constantvalue_index;
1360 *is_synthetic_addr = is_synthetic;
1361 *generic_signature_index_addr = generic_signature_index;
1362 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1363 runtime_visible_annotations_length,
1364 runtime_invisible_annotations,
1365 runtime_invisible_annotations_length,
1366 CHECK);
1367 parsed_annotations->set_field_annotations(a);
1368 a = assemble_annotations(runtime_visible_type_annotations,
1369 runtime_visible_type_annotations_length,
1370 runtime_invisible_type_annotations,
1371 runtime_invisible_type_annotations_length,
1372 CHECK);
1373 parsed_annotations->set_field_type_annotations(a);
1374 return;
1375 }
1376
1377
1378 // Field allocation types. Used for computing field offsets.
1379
1380 enum FieldAllocationType {
1381 STATIC_OOP, // Oops
1382 STATIC_BYTE, // Boolean, Byte, char
1383 STATIC_SHORT, // shorts
1384 STATIC_WORD, // ints
1385 STATIC_DOUBLE, // aligned long or double
1386 NONSTATIC_OOP,
1387 NONSTATIC_BYTE,
1388 NONSTATIC_SHORT,
1389 NONSTATIC_WORD,
1390 NONSTATIC_DOUBLE,
1391 MAX_FIELD_ALLOCATION_TYPE,
1392 BAD_ALLOCATION_TYPE = -1
1393 };
1394
1395 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1396 BAD_ALLOCATION_TYPE, // 0
1397 BAD_ALLOCATION_TYPE, // 1
1398 BAD_ALLOCATION_TYPE, // 2
1399 BAD_ALLOCATION_TYPE, // 3
1400 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1401 NONSTATIC_SHORT, // T_CHAR = 5,
1402 NONSTATIC_WORD, // T_FLOAT = 6,
1403 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1404 NONSTATIC_BYTE, // T_BYTE = 8,
1405 NONSTATIC_SHORT, // T_SHORT = 9,
1406 NONSTATIC_WORD, // T_INT = 10,
1407 NONSTATIC_DOUBLE, // T_LONG = 11,
1408 NONSTATIC_OOP, // T_OBJECT = 12,
1409 NONSTATIC_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 BAD_ALLOCATION_TYPE, // 0
1417 BAD_ALLOCATION_TYPE, // 1
1418 BAD_ALLOCATION_TYPE, // 2
1419 BAD_ALLOCATION_TYPE, // 3
1420 STATIC_BYTE , // T_BOOLEAN = 4,
1421 STATIC_SHORT, // T_CHAR = 5,
1422 STATIC_WORD, // T_FLOAT = 6,
1423 STATIC_DOUBLE, // T_DOUBLE = 7,
1424 STATIC_BYTE, // T_BYTE = 8,
1425 STATIC_SHORT, // T_SHORT = 9,
1426 STATIC_WORD, // T_INT = 10,
1427 STATIC_DOUBLE, // T_LONG = 11,
1428 STATIC_OOP, // T_OBJECT = 12,
1429 STATIC_OOP, // T_ARRAY = 13,
1430 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1431 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1432 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1433 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1434 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1435 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1436 };
1437
1438 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1439 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1440 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1441 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1442 return result;
1443 }
1444
1445 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1446 public:
1447 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1448
1449 FieldAllocationCount() {
1450 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1451 count[i] = 0;
1452 }
1453 }
1454
1455 FieldAllocationType update(bool is_static, BasicType type) {
1456 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1457 if (atype != BAD_ALLOCATION_TYPE) {
1458 // Make sure there is no overflow with injected fields.
1459 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1460 count[atype]++;
1461 }
1462 return atype;
1463 }
1464 };
1465
1466 // Side-effects: populates the _fields, _fields_annotations,
1467 // _fields_type_annotations fields
1468 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1469 bool is_interface,
1470 FieldAllocationCount* const fac,
1471 ConstantPool* cp,
1472 const int cp_size,
1473 u2* const java_fields_count_ptr,
1474 TRAPS) {
1475
1476 assert(cfs != NULL, "invariant");
1477 assert(fac != NULL, "invariant");
1478 assert(cp != NULL, "invariant");
1479 assert(java_fields_count_ptr != NULL, "invariant");
1480
1481 assert(NULL == _fields, "invariant");
1482 assert(NULL == _fields_annotations, "invariant");
1483 assert(NULL == _fields_type_annotations, "invariant");
1484
1485 cfs->guarantee_more(2, CHECK); // length
1486 const u2 length = cfs->get_u2_fast();
1487 *java_fields_count_ptr = length;
1488
1489 int num_injected = 0;
1490 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1491 &num_injected);
1492 const int total_fields = length + num_injected;
1493
1494 // The field array starts with tuples of shorts
1495 // [access, name index, sig index, initial value index, byte offset].
1496 // A generic signature slot only exists for field with generic
1497 // signature attribute. And the access flag is set with
1498 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1499 // signature slots are at the end of the field array and after all
1500 // other fields data.
1501 //
1502 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1503 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1504 // ...
1505 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1506 // [generic signature index]
1507 // [generic signature index]
1508 // ...
1509 //
1510 // Allocate a temporary resource array for field data. For each field,
1511 // a slot is reserved in the temporary array for the generic signature
1512 // index. After parsing all fields, the data are copied to a permanent
1513 // array and any unused slots will be discarded.
1514 ResourceMark rm(THREAD);
1515 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1516 u2,
1517 total_fields * (FieldInfo::field_slots + 1));
1518
1519 // The generic signature slots start after all other fields' data.
1520 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1521 int num_generic_signature = 0;
1522 for (int n = 0; n < length; n++) {
1523 // access_flags, name_index, descriptor_index, attributes_count
1524 cfs->guarantee_more(8, CHECK);
1525
1526 AccessFlags access_flags;
1527 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1528 verify_legal_field_modifiers(flags, is_interface, CHECK);
1529 access_flags.set_flags(flags);
1530
1531 const u2 name_index = cfs->get_u2_fast();
1532 check_property(valid_symbol_at(name_index),
1533 "Invalid constant pool index %u for field name in class file %s",
1534 name_index, CHECK);
1535 const Symbol* const name = cp->symbol_at(name_index);
1536 verify_legal_field_name(name, CHECK);
1537
1538 const u2 signature_index = cfs->get_u2_fast();
1539 check_property(valid_symbol_at(signature_index),
1540 "Invalid constant pool index %u for field signature in class file %s",
1541 signature_index, CHECK);
1542 const Symbol* const sig = cp->symbol_at(signature_index);
1543 verify_legal_field_signature(name, sig, CHECK);
1544
1545 u2 constantvalue_index = 0;
1546 bool is_synthetic = false;
1547 u2 generic_signature_index = 0;
1548 const bool is_static = access_flags.is_static();
1549 FieldAnnotationCollector parsed_annotations(_loader_data);
1550
1551 const u2 attributes_count = cfs->get_u2_fast();
1552 if (attributes_count > 0) {
1553 parse_field_attributes(cfs,
1554 attributes_count,
1555 is_static,
1556 signature_index,
1557 &constantvalue_index,
1558 &is_synthetic,
1559 &generic_signature_index,
1560 &parsed_annotations,
1561 CHECK);
1562
1563 if (parsed_annotations.field_annotations() != NULL) {
1564 if (_fields_annotations == NULL) {
1565 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1566 _loader_data, length, NULL,
1567 CHECK);
1568 }
1569 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1570 parsed_annotations.set_field_annotations(NULL);
1571 }
1572 if (parsed_annotations.field_type_annotations() != NULL) {
1573 if (_fields_type_annotations == NULL) {
1574 _fields_type_annotations =
1575 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1576 length,
1577 NULL,
1578 CHECK);
1579 }
1580 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1581 parsed_annotations.set_field_type_annotations(NULL);
1582 }
1583
1584 if (is_synthetic) {
1585 access_flags.set_is_synthetic();
1586 }
1587 if (generic_signature_index != 0) {
1588 access_flags.set_field_has_generic_signature();
1589 fa[generic_signature_slot] = generic_signature_index;
1590 generic_signature_slot ++;
1591 num_generic_signature ++;
1592 }
1593 }
1594
1595 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1596 field->initialize(access_flags.as_short(),
1597 name_index,
1598 signature_index,
1599 constantvalue_index);
1600 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1601
1602 // Remember how many oops we encountered and compute allocation type
1603 const FieldAllocationType atype = fac->update(is_static, type);
1604 field->set_allocation_type(atype);
1605
1606 // After field is initialized with type, we can augment it with aux info
1607 if (parsed_annotations.has_any_annotations())
1608 parsed_annotations.apply_to(field);
1609 }
1610
1611 int index = length;
1612 if (num_injected != 0) {
1613 for (int n = 0; n < num_injected; n++) {
1614 // Check for duplicates
1615 if (injected[n].may_be_java) {
1616 const Symbol* const name = injected[n].name();
1617 const Symbol* const signature = injected[n].signature();
1618 bool duplicate = false;
1619 for (int i = 0; i < length; i++) {
1620 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1621 if (name == cp->symbol_at(f->name_index()) &&
1622 signature == cp->symbol_at(f->signature_index())) {
1623 // Symbol is desclared in Java so skip this one
1624 duplicate = true;
1625 break;
1626 }
1627 }
1628 if (duplicate) {
1629 // These will be removed from the field array at the end
1630 continue;
1631 }
1632 }
1633
1634 // Injected field
1635 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1636 field->initialize(JVM_ACC_FIELD_INTERNAL,
1637 injected[n].name_index,
1638 injected[n].signature_index,
1639 0);
1640
1641 const BasicType type = FieldType::basic_type(injected[n].signature());
1642
1643 // Remember how many oops we encountered and compute allocation type
1644 const FieldAllocationType atype = fac->update(false, type);
1645 field->set_allocation_type(atype);
1646 index++;
1647 }
1648 }
1649
1650 assert(NULL == _fields, "invariant");
1651
1652 _fields =
1653 MetadataFactory::new_array<u2>(_loader_data,
1654 index * FieldInfo::field_slots + num_generic_signature,
1655 CHECK);
1656 // Sometimes injected fields already exist in the Java source so
1657 // the fields array could be too long. In that case the
1658 // fields array is trimed. Also unused slots that were reserved
1659 // for generic signature indexes are discarded.
1660 {
1661 int i = 0;
1662 for (; i < index * FieldInfo::field_slots; i++) {
1663 _fields->at_put(i, fa[i]);
1664 }
1665 for (int j = total_fields * FieldInfo::field_slots;
1666 j < generic_signature_slot; j++) {
1667 _fields->at_put(i++, fa[j]);
1668 }
1669 assert(_fields->length() == i, "");
1670 }
1671
1672 if (_need_verify && length > 1) {
1673 // Check duplicated fields
1674 ResourceMark rm(THREAD);
1675 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1676 THREAD, NameSigHash*, HASH_ROW_SIZE);
1677 initialize_hashtable(names_and_sigs);
1678 bool dup = false;
1679 const Symbol* name = NULL;
1680 const Symbol* sig = NULL;
1681 {
1682 debug_only(NoSafepointVerifier nsv;)
1683 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1684 name = fs.name();
1685 sig = fs.signature();
1686 // If no duplicates, add name/signature in hashtable names_and_sigs.
1687 if (!put_after_lookup(name, sig, names_and_sigs)) {
1688 dup = true;
1689 break;
1690 }
1691 }
1692 }
1693 if (dup) {
1694 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1695 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1696 }
1697 }
1698 }
1699
1700
1701 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) {
1702 while (length-- > 0) {
1703 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1704 }
1705 }
1706
1707 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1708 u4 code_length,
1709 u4 exception_table_length,
1710 TRAPS) {
1711 assert(cfs != NULL, "invariant");
1712
1713 const u2* const exception_table_start = cfs->get_u2_buffer();
1714 assert(exception_table_start != NULL, "null exception table");
1715
1716 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1717 // end_pc,
1718 // handler_pc,
1719 // catch_type_index
1720
1721 // Will check legal target after parsing code array in verifier.
1722 if (_need_verify) {
1723 for (unsigned int i = 0; i < exception_table_length; i++) {
1724 const u2 start_pc = cfs->get_u2_fast();
1725 const u2 end_pc = cfs->get_u2_fast();
1726 const u2 handler_pc = cfs->get_u2_fast();
1727 const u2 catch_type_index = cfs->get_u2_fast();
1728 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1729 "Illegal exception table range in class file %s",
1730 CHECK_NULL);
1731 guarantee_property(handler_pc < code_length,
1732 "Illegal exception table handler in class file %s",
1733 CHECK_NULL);
1734 if (catch_type_index != 0) {
1735 guarantee_property(valid_klass_reference_at(catch_type_index),
1736 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1737 }
1738 }
1739 } else {
1740 cfs->skip_u2_fast(exception_table_length * 4);
1741 }
1742 return exception_table_start;
1743 }
1744
1745 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1746 u4 code_length,
1747 CompressedLineNumberWriteStream**const write_stream,
1748 TRAPS) {
1749
1750 const ClassFileStream* const cfs = _stream;
1751 unsigned int num_entries = cfs->get_u2(CHECK);
1752
1753 // Each entry is a u2 start_pc, and a u2 line_number
1754 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1755
1756 // Verify line number attribute and table length
1757 check_property(
1758 code_attribute_length == sizeof(u2) + length_in_bytes,
1759 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1760
1761 cfs->guarantee_more(length_in_bytes, CHECK);
1762
1763 if ((*write_stream) == NULL) {
1764 if (length_in_bytes > fixed_buffer_size) {
1765 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1766 } else {
1767 (*write_stream) = new CompressedLineNumberWriteStream(
1768 _linenumbertable_buffer, fixed_buffer_size);
1769 }
1770 }
1771
1772 while (num_entries-- > 0) {
1773 const u2 bci = cfs->get_u2_fast(); // start_pc
1774 const u2 line = cfs->get_u2_fast(); // line_number
1775 guarantee_property(bci < code_length,
1776 "Invalid pc in LineNumberTable in class file %s", CHECK);
1777 (*write_stream)->write_pair(bci, line);
1778 }
1779 }
1780
1781
1782 class LVT_Hash : public AllStatic {
1783 public:
1784
1785 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1786 /*
1787 * 3-tuple start_bci/length/slot has to be unique key,
1788 * so the following comparison seems to be redundant:
1789 * && elem->name_cp_index == entry->_elem->name_cp_index
1790 */
1791 return (e0.start_bci == e1.start_bci &&
1792 e0.length == e1.length &&
1793 e0.name_cp_index == e1.name_cp_index &&
1794 e0.slot == e1.slot);
1795 }
1796
1797 static unsigned int hash(LocalVariableTableElement const& e0) {
1798 unsigned int raw_hash = e0.start_bci;
1799
1800 raw_hash = e0.length + raw_hash * 37;
1801 raw_hash = e0.name_cp_index + raw_hash * 37;
1802 raw_hash = e0.slot + raw_hash * 37;
1803
1804 return raw_hash;
1805 }
1806 };
1807
1808
1809 // Class file LocalVariableTable elements.
1810 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1811 public:
1812 u2 start_bci;
1813 u2 length;
1814 u2 name_cp_index;
1815 u2 descriptor_cp_index;
1816 u2 slot;
1817 };
1818
1819 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1820 LocalVariableTableElement* const lvt) {
1821 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1822 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1823 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1824 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1825 lvt->signature_cp_index = 0;
1826 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1827 }
1828
1829 // Function is used to parse both attributes:
1830 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1831 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1832 u4 code_length,
1833 u2 max_locals,
1834 u4 code_attribute_length,
1835 u2* const localvariable_table_length,
1836 bool isLVTT,
1837 TRAPS) {
1838 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1839 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1840 const unsigned int size =
1841 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1842
1843 const ConstantPool* const cp = _cp;
1844
1845 // Verify local variable table attribute has right length
1846 if (_need_verify) {
1847 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1848 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1849 }
1850
1851 const u2* const localvariable_table_start = cfs->get_u2_buffer();
1852 assert(localvariable_table_start != NULL, "null local variable table");
1853 if (!_need_verify) {
1854 cfs->skip_u2_fast(size);
1855 } else {
1856 cfs->guarantee_more(size * 2, CHECK_NULL);
1857 for(int i = 0; i < (*localvariable_table_length); i++) {
1858 const u2 start_pc = cfs->get_u2_fast();
1859 const u2 length = cfs->get_u2_fast();
1860 const u2 name_index = cfs->get_u2_fast();
1861 const u2 descriptor_index = cfs->get_u2_fast();
1862 const u2 index = cfs->get_u2_fast();
1863 // Assign to a u4 to avoid overflow
1864 const u4 end_pc = (u4)start_pc + (u4)length;
1865
1866 if (start_pc >= code_length) {
1867 classfile_parse_error(
1868 "Invalid start_pc %u in %s in class file %s",
1869 start_pc, tbl_name, CHECK_NULL);
1870 }
1871 if (end_pc > code_length) {
1872 classfile_parse_error(
1873 "Invalid length %u in %s in class file %s",
1874 length, tbl_name, CHECK_NULL);
1875 }
1876 const int cp_size = cp->length();
1877 guarantee_property(valid_symbol_at(name_index),
1878 "Name index %u in %s has bad constant type in class file %s",
1879 name_index, tbl_name, CHECK_NULL);
1880 guarantee_property(valid_symbol_at(descriptor_index),
1881 "Signature index %u in %s has bad constant type in class file %s",
1882 descriptor_index, tbl_name, CHECK_NULL);
1883
1884 const Symbol* const name = cp->symbol_at(name_index);
1885 const Symbol* const sig = cp->symbol_at(descriptor_index);
1886 verify_legal_field_name(name, CHECK_NULL);
1887 u2 extra_slot = 0;
1888 if (!isLVTT) {
1889 verify_legal_field_signature(name, sig, CHECK_NULL);
1890
1891 // 4894874: check special cases for double and long local variables
1892 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1893 sig == vmSymbols::type_signature(T_LONG)) {
1894 extra_slot = 1;
1895 }
1896 }
1897 guarantee_property((index + extra_slot) < max_locals,
1898 "Invalid index %u in %s in class file %s",
1899 index, tbl_name, CHECK_NULL);
1900 }
1901 }
1902 return localvariable_table_start;
1903 }
1904
1905
1906 void ClassFileParser::parse_type_array(u2 array_length,
1907 u4 code_length,
1908 u4* const u1_index,
1909 u4* const u2_index,
1910 u1* const u1_array,
1911 u2* const u2_array,
1912 TRAPS) {
1913 const ClassFileStream* const cfs = _stream;
1914 u2 index = 0; // index in the array with long/double occupying two slots
1915 u4 i1 = *u1_index;
1916 u4 i2 = *u2_index + 1;
1917 for(int i = 0; i < array_length; i++) {
1918 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1919 index++;
1920 if (tag == ITEM_Long || tag == ITEM_Double) {
1921 index++;
1922 } else if (tag == ITEM_Object) {
1923 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1924 guarantee_property(valid_klass_reference_at(class_index),
1925 "Bad class index %u in StackMap in class file %s",
1926 class_index, CHECK);
1927 } else if (tag == ITEM_Uninitialized) {
1928 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1929 guarantee_property(
1930 offset < code_length,
1931 "Bad uninitialized type offset %u in StackMap in class file %s",
1932 offset, CHECK);
1933 } else {
1934 guarantee_property(
1935 tag <= (u1)ITEM_Uninitialized,
1936 "Unknown variable type %u in StackMap in class file %s",
1937 tag, CHECK);
1938 }
1939 }
1940 u2_array[*u2_index] = index;
1941 *u1_index = i1;
1942 *u2_index = i2;
1943 }
1944
1945 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1946 u4 code_attribute_length,
1947 bool need_verify,
1948 TRAPS) {
1949 assert(cfs != NULL, "invariant");
1950
1951 if (0 == code_attribute_length) {
1952 return NULL;
1953 }
1954
1955 const u1* const stackmap_table_start = cfs->get_u1_buffer();
1956 assert(stackmap_table_start != NULL, "null stackmap table");
1957
1958 // check code_attribute_length first
1959 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1960
1961 if (!need_verify && !DumpSharedSpaces) {
1962 return NULL;
1963 }
1964 return stackmap_table_start;
1965 }
1966
1967 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1968 u2* const checked_exceptions_length,
1969 u4 method_attribute_length,
1970 TRAPS) {
1971 assert(cfs != NULL, "invariant");
1972 assert(checked_exceptions_length != NULL, "invariant");
1973
1974 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1975 *checked_exceptions_length = cfs->get_u2_fast();
1976 const unsigned int size =
1977 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1978 const u2* const checked_exceptions_start = cfs->get_u2_buffer();
1979 assert(checked_exceptions_start != NULL, "null checked exceptions");
1980 if (!_need_verify) {
1981 cfs->skip_u2_fast(size);
1982 } else {
1983 // Verify each value in the checked exception table
1984 u2 checked_exception;
1985 const u2 len = *checked_exceptions_length;
1986 cfs->guarantee_more(2 * len, CHECK_NULL);
1987 for (int i = 0; i < len; i++) {
1988 checked_exception = cfs->get_u2_fast();
1989 check_property(
1990 valid_klass_reference_at(checked_exception),
1991 "Exception name has bad type at constant pool %u in class file %s",
1992 checked_exception, CHECK_NULL);
1993 }
1994 }
1995 // check exceptions attribute length
1996 if (_need_verify) {
1997 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1998 sizeof(u2) * size),
1999 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2000 }
2001 return checked_exceptions_start;
2002 }
2003
2004 void ClassFileParser::throwIllegalSignature(const char* type,
2005 const Symbol* name,
2006 const Symbol* sig,
2007 TRAPS) const {
2008 assert(name != NULL, "invariant");
2009 assert(sig != NULL, "invariant");
2010
2011 ResourceMark rm(THREAD);
2012 Exceptions::fthrow(THREAD_AND_LOCATION,
2013 vmSymbols::java_lang_ClassFormatError(),
2014 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2015 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2016 }
2017
2018 AnnotationCollector::ID
2019 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2020 const Symbol* name) {
2021 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2022 // Privileged code can use all annotations. Other code silently drops some.
2023 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2024 loader_data->is_platform_class_loader_data() ||
2025 loader_data->is_anonymous();
2026 switch (sid) {
2027 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2028 if (_location != _in_method) break; // only allow for methods
2029 if (!privileged) break; // only allow in privileged code
2030 return _method_CallerSensitive;
2031 }
2032 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2033 if (_location != _in_method) break; // only allow for methods
2034 if (!privileged) break; // only allow in privileged code
2035 return _method_ForceInline;
2036 }
2037 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2038 if (_location != _in_method) break; // only allow for methods
2039 if (!privileged) break; // only allow in privileged code
2040 return _method_DontInline;
2041 }
2042 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2043 if (_location != _in_method) break; // only allow for methods
2044 if (!privileged) break; // only allow in privileged code
2045 return _method_InjectedProfile;
2046 }
2047 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2048 if (_location != _in_method) break; // only allow for methods
2049 if (!privileged) break; // only allow in privileged code
2050 return _method_LambdaForm_Compiled;
2051 }
2052 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
2053 if (_location != _in_method) break; // only allow for methods
2054 if (!privileged) break; // only allow in privileged code
2055 return _method_LambdaForm_Hidden;
2056 }
2057 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2058 if (_location != _in_method) break; // only allow for methods
2059 if (!privileged) break; // only allow in privileged code
2060 return _method_HotSpotIntrinsicCandidate;
2061 }
2062 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2063 if (_location != _in_field) break; // only allow for fields
2064 if (!privileged) break; // only allow in privileged code
2065 return _field_Stable;
2066 }
2067 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2068 if (_location != _in_field && _location != _in_class) {
2069 break; // only allow for fields and classes
2070 }
2071 if (!EnableContended || (RestrictContended && !privileged)) {
2072 break; // honor privileges
2073 }
2074 return _jdk_internal_vm_annotation_Contended;
2075 }
2076 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2077 if (_location != _in_method) break; // only allow for methods
2078 if (RestrictReservedStack && !privileged) break; // honor privileges
2079 return _jdk_internal_vm_annotation_ReservedStackAccess;
2080 }
2081 default: {
2082 break;
2083 }
2084 }
2085 return AnnotationCollector::_unknown;
2086 }
2087
2088 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2089 if (is_contended())
2090 f->set_contended_group(contended_group());
2091 if (is_stable())
2092 f->set_stable(true);
2093 }
2094
2095 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2096 // If there's an error deallocate metadata for field annotations
2097 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2098 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2099 }
2100
2101 void MethodAnnotationCollector::apply_to(methodHandle m) {
2102 if (has_annotation(_method_CallerSensitive))
2103 m->set_caller_sensitive(true);
2104 if (has_annotation(_method_ForceInline))
2105 m->set_force_inline(true);
2106 if (has_annotation(_method_DontInline))
2107 m->set_dont_inline(true);
2108 if (has_annotation(_method_InjectedProfile))
2109 m->set_has_injected_profile(true);
2110 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2111 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2112 if (has_annotation(_method_LambdaForm_Hidden))
2113 m->set_hidden(true);
2114 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2115 m->set_intrinsic_candidate(true);
2116 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2117 m->set_has_reserved_stack_access(true);
2118 }
2119
2120 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2121 assert(ik != NULL, "invariant");
2122 ik->set_is_contended(is_contended());
2123 }
2124
2125 #define MAX_ARGS_SIZE 255
2126 #define MAX_CODE_SIZE 65535
2127 #define INITIAL_MAX_LVT_NUMBER 256
2128
2129 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2130 *
2131 * Rules for LVT's and LVTT's are:
2132 * - There can be any number of LVT's and LVTT's.
2133 * - If there are n LVT's, it is the same as if there was just
2134 * one LVT containing all the entries from the n LVT's.
2135 * - There may be no more than one LVT entry per local variable.
2136 * Two LVT entries are 'equal' if these fields are the same:
2137 * start_pc, length, name, slot
2138 * - There may be no more than one LVTT entry per each LVT entry.
2139 * Each LVTT entry has to match some LVT entry.
2140 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2141 */
2142 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2143 int lvt_cnt,
2144 u2* const localvariable_table_length,
2145 const u2**const localvariable_table_start,
2146 int lvtt_cnt,
2147 u2* const localvariable_type_table_length,
2148 const u2**const localvariable_type_table_start,
2149 TRAPS) {
2150
2151 ResourceMark rm(THREAD);
2152
2153 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2154 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2155
2156 LVT_HashTable* const table = new LVT_HashTable();
2157
2158 // To fill LocalVariableTable in
2159 const Classfile_LVT_Element* cf_lvt;
2160 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2161
2162 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2163 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2164 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2165 copy_lvt_element(&cf_lvt[idx], lvt);
2166 // If no duplicates, add LVT elem in hashtable.
2167 if (table->put(*lvt, lvt) == false
2168 && _need_verify
2169 && _major_version >= JAVA_1_5_VERSION) {
2170 classfile_parse_error("Duplicated LocalVariableTable attribute "
2171 "entry for '%s' in class file %s",
2172 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2173 CHECK);
2174 }
2175 }
2176 }
2177
2178 // To merge LocalVariableTable and LocalVariableTypeTable
2179 const Classfile_LVT_Element* cf_lvtt;
2180 LocalVariableTableElement lvtt_elem;
2181
2182 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2183 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2184 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2185 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2186 LocalVariableTableElement** entry = table->get(lvtt_elem);
2187 if (entry == NULL) {
2188 if (_need_verify) {
2189 classfile_parse_error("LVTT entry for '%s' in class file %s "
2190 "does not match any LVT entry",
2191 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2192 CHECK);
2193 }
2194 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2195 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2196 "entry for '%s' in class file %s",
2197 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2198 CHECK);
2199 } else {
2200 // to add generic signatures into LocalVariableTable
2201 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2202 }
2203 }
2204 }
2205 }
2206
2207
2208 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2209 const u1* runtime_visible_annotations,
2210 int runtime_visible_annotations_length,
2211 const u1* runtime_invisible_annotations,
2212 int runtime_invisible_annotations_length,
2213 const u1* runtime_visible_parameter_annotations,
2214 int runtime_visible_parameter_annotations_length,
2215 const u1* runtime_invisible_parameter_annotations,
2216 int runtime_invisible_parameter_annotations_length,
2217 const u1* runtime_visible_type_annotations,
2218 int runtime_visible_type_annotations_length,
2219 const u1* runtime_invisible_type_annotations,
2220 int runtime_invisible_type_annotations_length,
2221 const u1* annotation_default,
2222 int annotation_default_length,
2223 TRAPS) {
2224
2225 AnnotationArray* a;
2226
2227 if (runtime_visible_annotations_length +
2228 runtime_invisible_annotations_length > 0) {
2229 a = assemble_annotations(runtime_visible_annotations,
2230 runtime_visible_annotations_length,
2231 runtime_invisible_annotations,
2232 runtime_invisible_annotations_length,
2233 CHECK);
2234 cm->set_method_annotations(a);
2235 }
2236
2237 if (runtime_visible_parameter_annotations_length +
2238 runtime_invisible_parameter_annotations_length > 0) {
2239 a = assemble_annotations(runtime_visible_parameter_annotations,
2240 runtime_visible_parameter_annotations_length,
2241 runtime_invisible_parameter_annotations,
2242 runtime_invisible_parameter_annotations_length,
2243 CHECK);
2244 cm->set_parameter_annotations(a);
2245 }
2246
2247 if (annotation_default_length > 0) {
2248 a = assemble_annotations(annotation_default,
2249 annotation_default_length,
2250 NULL,
2251 0,
2252 CHECK);
2253 cm->set_default_annotations(a);
2254 }
2255
2256 if (runtime_visible_type_annotations_length +
2257 runtime_invisible_type_annotations_length > 0) {
2258 a = assemble_annotations(runtime_visible_type_annotations,
2259 runtime_visible_type_annotations_length,
2260 runtime_invisible_type_annotations,
2261 runtime_invisible_type_annotations_length,
2262 CHECK);
2263 cm->set_type_annotations(a);
2264 }
2265 }
2266
2267
2268 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2269 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2270 // Method* to save footprint, so we only know the size of the resulting Method* when the
2271 // entire method attribute is parsed.
2272 //
2273 // The promoted_flags parameter is used to pass relevant access_flags
2274 // from the method back up to the containing klass. These flag values
2275 // are added to klass's access_flags.
2276
2277 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2278 bool is_interface,
2279 const ConstantPool* cp,
2280 AccessFlags* const promoted_flags,
2281 TRAPS) {
2282 assert(cfs != NULL, "invariant");
2283 assert(cp != NULL, "invariant");
2284 assert(promoted_flags != NULL, "invariant");
2285
2286 ResourceMark rm(THREAD);
2287 // Parse fixed parts:
2288 // access_flags, name_index, descriptor_index, attributes_count
2289 cfs->guarantee_more(8, CHECK_NULL);
2290
2291 int flags = cfs->get_u2_fast();
2292 const u2 name_index = cfs->get_u2_fast();
2293 const int cp_size = cp->length();
2294 check_property(
2295 valid_symbol_at(name_index),
2296 "Illegal constant pool index %u for method name in class file %s",
2297 name_index, CHECK_NULL);
2298 const Symbol* const name = cp->symbol_at(name_index);
2299 verify_legal_method_name(name, CHECK_NULL);
2300
2301 const u2 signature_index = cfs->get_u2_fast();
2302 guarantee_property(
2303 valid_symbol_at(signature_index),
2304 "Illegal constant pool index %u for method signature in class file %s",
2305 signature_index, CHECK_NULL);
2306 const Symbol* const signature = cp->symbol_at(signature_index);
2307
2308 if (name == vmSymbols::class_initializer_name()) {
2309 // We ignore the other access flags for a valid class initializer.
2310 // (JVM Spec 2nd ed., chapter 4.6)
2311 if (_major_version < 51) { // backward compatibility
2312 flags = JVM_ACC_STATIC;
2313 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2314 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2315 } else {
2316 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2317 }
2318 } else {
2319 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2320 }
2321
2322 if (name == vmSymbols::object_initializer_name() && is_interface) {
2323 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2324 }
2325
2326 int args_size = -1; // only used when _need_verify is true
2327 if (_need_verify) {
2328 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2329 verify_legal_method_signature(name, signature, CHECK_NULL);
2330 if (args_size > MAX_ARGS_SIZE) {
2331 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2332 }
2333 }
2334
2335 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2336
2337 // Default values for code and exceptions attribute elements
2338 u2 max_stack = 0;
2339 u2 max_locals = 0;
2340 u4 code_length = 0;
2341 const u1* code_start = 0;
2342 u2 exception_table_length = 0;
2343 const u2* exception_table_start = NULL;
2344 Array<int>* exception_handlers = Universe::the_empty_int_array();
2345 u2 checked_exceptions_length = 0;
2346 const u2* checked_exceptions_start = NULL;
2347 CompressedLineNumberWriteStream* linenumber_table = NULL;
2348 int linenumber_table_length = 0;
2349 int total_lvt_length = 0;
2350 u2 lvt_cnt = 0;
2351 u2 lvtt_cnt = 0;
2352 bool lvt_allocated = false;
2353 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2354 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2355 u2* localvariable_table_length = NULL;
2356 const u2** localvariable_table_start = NULL;
2357 u2* localvariable_type_table_length = NULL;
2358 const u2** localvariable_type_table_start = NULL;
2359 int method_parameters_length = -1;
2360 const u1* method_parameters_data = NULL;
2361 bool method_parameters_seen = false;
2362 bool parsed_code_attribute = false;
2363 bool parsed_checked_exceptions_attribute = false;
2364 bool parsed_stackmap_attribute = false;
2365 // stackmap attribute - JDK1.5
2366 const u1* stackmap_data = NULL;
2367 int stackmap_data_length = 0;
2368 u2 generic_signature_index = 0;
2369 MethodAnnotationCollector parsed_annotations;
2370 const u1* runtime_visible_annotations = NULL;
2371 int runtime_visible_annotations_length = 0;
2372 const u1* runtime_invisible_annotations = NULL;
2373 int runtime_invisible_annotations_length = 0;
2374 const u1* runtime_visible_parameter_annotations = NULL;
2375 int runtime_visible_parameter_annotations_length = 0;
2376 const u1* runtime_invisible_parameter_annotations = NULL;
2377 int runtime_invisible_parameter_annotations_length = 0;
2378 const u1* runtime_visible_type_annotations = NULL;
2379 int runtime_visible_type_annotations_length = 0;
2380 const u1* runtime_invisible_type_annotations = NULL;
2381 int runtime_invisible_type_annotations_length = 0;
2382 bool runtime_invisible_annotations_exists = false;
2383 bool runtime_invisible_type_annotations_exists = false;
2384 bool runtime_invisible_parameter_annotations_exists = false;
2385 const u1* annotation_default = NULL;
2386 int annotation_default_length = 0;
2387
2388 // Parse code and exceptions attribute
2389 u2 method_attributes_count = cfs->get_u2_fast();
2390 while (method_attributes_count--) {
2391 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2392 const u2 method_attribute_name_index = cfs->get_u2_fast();
2393 const u4 method_attribute_length = cfs->get_u4_fast();
2394 check_property(
2395 valid_symbol_at(method_attribute_name_index),
2396 "Invalid method attribute name index %u in class file %s",
2397 method_attribute_name_index, CHECK_NULL);
2398
2399 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2400 if (method_attribute_name == vmSymbols::tag_code()) {
2401 // Parse Code attribute
2402 if (_need_verify) {
2403 guarantee_property(
2404 !access_flags.is_native() && !access_flags.is_abstract(),
2405 "Code attribute in native or abstract methods in class file %s",
2406 CHECK_NULL);
2407 }
2408 if (parsed_code_attribute) {
2409 classfile_parse_error("Multiple Code attributes in class file %s",
2410 CHECK_NULL);
2411 }
2412 parsed_code_attribute = true;
2413
2414 // Stack size, locals size, and code size
2415 if (_major_version == 45 && _minor_version <= 2) {
2416 cfs->guarantee_more(4, CHECK_NULL);
2417 max_stack = cfs->get_u1_fast();
2418 max_locals = cfs->get_u1_fast();
2419 code_length = cfs->get_u2_fast();
2420 } else {
2421 cfs->guarantee_more(8, CHECK_NULL);
2422 max_stack = cfs->get_u2_fast();
2423 max_locals = cfs->get_u2_fast();
2424 code_length = cfs->get_u4_fast();
2425 }
2426 if (_need_verify) {
2427 guarantee_property(args_size <= max_locals,
2428 "Arguments can't fit into locals in class file %s",
2429 CHECK_NULL);
2430 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2431 "Invalid method Code length %u in class file %s",
2432 code_length, CHECK_NULL);
2433 }
2434 // Code pointer
2435 code_start = cfs->get_u1_buffer();
2436 assert(code_start != NULL, "null code start");
2437 cfs->guarantee_more(code_length, CHECK_NULL);
2438 cfs->skip_u1_fast(code_length);
2439
2440 // Exception handler table
2441 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2442 exception_table_length = cfs->get_u2_fast();
2443 if (exception_table_length > 0) {
2444 exception_table_start = parse_exception_table(cfs,
2445 code_length,
2446 exception_table_length,
2447 CHECK_NULL);
2448 }
2449
2450 // Parse additional attributes in code attribute
2451 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2452 u2 code_attributes_count = cfs->get_u2_fast();
2453
2454 unsigned int calculated_attribute_length = 0;
2455
2456 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2457 calculated_attribute_length =
2458 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2459 } else {
2460 // max_stack, locals and length are smaller in pre-version 45.2 classes
2461 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2462 }
2463 calculated_attribute_length +=
2464 code_length +
2465 sizeof(exception_table_length) +
2466 sizeof(code_attributes_count) +
2467 exception_table_length *
2468 ( sizeof(u2) + // start_pc
2469 sizeof(u2) + // end_pc
2470 sizeof(u2) + // handler_pc
2471 sizeof(u2) ); // catch_type_index
2472
2473 while (code_attributes_count--) {
2474 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2475 const u2 code_attribute_name_index = cfs->get_u2_fast();
2476 const u4 code_attribute_length = cfs->get_u4_fast();
2477 calculated_attribute_length += code_attribute_length +
2478 sizeof(code_attribute_name_index) +
2479 sizeof(code_attribute_length);
2480 check_property(valid_symbol_at(code_attribute_name_index),
2481 "Invalid code attribute name index %u in class file %s",
2482 code_attribute_name_index,
2483 CHECK_NULL);
2484 if (LoadLineNumberTables &&
2485 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2486 // Parse and compress line number table
2487 parse_linenumber_table(code_attribute_length,
2488 code_length,
2489 &linenumber_table,
2490 CHECK_NULL);
2491
2492 } else if (LoadLocalVariableTables &&
2493 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2494 // Parse local variable table
2495 if (!lvt_allocated) {
2496 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2497 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2498 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2499 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2500 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2501 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2502 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2503 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2504 lvt_allocated = true;
2505 }
2506 if (lvt_cnt == max_lvt_cnt) {
2507 max_lvt_cnt <<= 1;
2508 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2509 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2510 }
2511 localvariable_table_start[lvt_cnt] =
2512 parse_localvariable_table(cfs,
2513 code_length,
2514 max_locals,
2515 code_attribute_length,
2516 &localvariable_table_length[lvt_cnt],
2517 false, // is not LVTT
2518 CHECK_NULL);
2519 total_lvt_length += localvariable_table_length[lvt_cnt];
2520 lvt_cnt++;
2521 } else if (LoadLocalVariableTypeTables &&
2522 _major_version >= JAVA_1_5_VERSION &&
2523 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2524 if (!lvt_allocated) {
2525 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2526 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2527 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2528 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2529 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2530 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2531 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2532 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2533 lvt_allocated = true;
2534 }
2535 // Parse local variable type table
2536 if (lvtt_cnt == max_lvtt_cnt) {
2537 max_lvtt_cnt <<= 1;
2538 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2539 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2540 }
2541 localvariable_type_table_start[lvtt_cnt] =
2542 parse_localvariable_table(cfs,
2543 code_length,
2544 max_locals,
2545 code_attribute_length,
2546 &localvariable_type_table_length[lvtt_cnt],
2547 true, // is LVTT
2548 CHECK_NULL);
2549 lvtt_cnt++;
2550 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2551 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2552 // Stack map is only needed by the new verifier in JDK1.5.
2553 if (parsed_stackmap_attribute) {
2554 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2555 }
2556 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2557 stackmap_data_length = code_attribute_length;
2558 parsed_stackmap_attribute = true;
2559 } else {
2560 // Skip unknown attributes
2561 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2562 }
2563 }
2564 // check method attribute length
2565 if (_need_verify) {
2566 guarantee_property(method_attribute_length == calculated_attribute_length,
2567 "Code segment has wrong length in class file %s",
2568 CHECK_NULL);
2569 }
2570 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2571 // Parse Exceptions attribute
2572 if (parsed_checked_exceptions_attribute) {
2573 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2574 CHECK_NULL);
2575 }
2576 parsed_checked_exceptions_attribute = true;
2577 checked_exceptions_start =
2578 parse_checked_exceptions(cfs,
2579 &checked_exceptions_length,
2580 method_attribute_length,
2581 CHECK_NULL);
2582 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2583 // reject multiple method parameters
2584 if (method_parameters_seen) {
2585 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2586 CHECK_NULL);
2587 }
2588 method_parameters_seen = true;
2589 method_parameters_length = cfs->get_u1_fast();
2590 const u2 real_length = (method_parameters_length * 4u) + 1u;
2591 if (method_attribute_length != real_length) {
2592 classfile_parse_error(
2593 "Invalid MethodParameters method attribute length %u in class file",
2594 method_attribute_length, CHECK_NULL);
2595 }
2596 method_parameters_data = cfs->get_u1_buffer();
2597 cfs->skip_u2_fast(method_parameters_length);
2598 cfs->skip_u2_fast(method_parameters_length);
2599 // ignore this attribute if it cannot be reflected
2600 if (!SystemDictionary::Parameter_klass_loaded())
2601 method_parameters_length = -1;
2602 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2603 if (method_attribute_length != 0) {
2604 classfile_parse_error(
2605 "Invalid Synthetic method attribute length %u in class file %s",
2606 method_attribute_length, CHECK_NULL);
2607 }
2608 // Should we check that there hasn't already been a synthetic attribute?
2609 access_flags.set_is_synthetic();
2610 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2611 if (method_attribute_length != 0) {
2612 classfile_parse_error(
2613 "Invalid Deprecated method attribute length %u in class file %s",
2614 method_attribute_length, CHECK_NULL);
2615 }
2616 } else if (_major_version >= JAVA_1_5_VERSION) {
2617 if (method_attribute_name == vmSymbols::tag_signature()) {
2618 if (generic_signature_index != 0) {
2619 classfile_parse_error(
2620 "Multiple Signature attributes for method in class file %s",
2621 CHECK_NULL);
2622 }
2623 if (method_attribute_length != 2) {
2624 classfile_parse_error(
2625 "Invalid Signature attribute length %u in class file %s",
2626 method_attribute_length, CHECK_NULL);
2627 }
2628 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2629 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2630 if (runtime_visible_annotations != NULL) {
2631 classfile_parse_error(
2632 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2633 CHECK_NULL);
2634 }
2635 runtime_visible_annotations_length = method_attribute_length;
2636 runtime_visible_annotations = cfs->get_u1_buffer();
2637 assert(runtime_visible_annotations != NULL, "null visible annotations");
2638 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2639 parse_annotations(cp,
2640 runtime_visible_annotations,
2641 runtime_visible_annotations_length,
2642 &parsed_annotations,
2643 _loader_data,
2644 CHECK_NULL);
2645 cfs->skip_u1_fast(runtime_visible_annotations_length);
2646 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2647 if (runtime_invisible_annotations_exists) {
2648 classfile_parse_error(
2649 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2650 CHECK_NULL);
2651 }
2652 runtime_invisible_annotations_exists = true;
2653 if (PreserveAllAnnotations) {
2654 runtime_invisible_annotations_length = method_attribute_length;
2655 runtime_invisible_annotations = cfs->get_u1_buffer();
2656 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2657 }
2658 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2659 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2660 if (runtime_visible_parameter_annotations != NULL) {
2661 classfile_parse_error(
2662 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2663 CHECK_NULL);
2664 }
2665 runtime_visible_parameter_annotations_length = method_attribute_length;
2666 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2667 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2668 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2669 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2670 if (runtime_invisible_parameter_annotations_exists) {
2671 classfile_parse_error(
2672 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2673 CHECK_NULL);
2674 }
2675 runtime_invisible_parameter_annotations_exists = true;
2676 if (PreserveAllAnnotations) {
2677 runtime_invisible_parameter_annotations_length = method_attribute_length;
2678 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2679 assert(runtime_invisible_parameter_annotations != NULL,
2680 "null invisible parameter annotations");
2681 }
2682 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2683 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2684 if (annotation_default != NULL) {
2685 classfile_parse_error(
2686 "Multiple AnnotationDefault attributes for method in class file %s",
2687 CHECK_NULL);
2688 }
2689 annotation_default_length = method_attribute_length;
2690 annotation_default = cfs->get_u1_buffer();
2691 assert(annotation_default != NULL, "null annotation default");
2692 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2693 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2694 if (runtime_visible_type_annotations != NULL) {
2695 classfile_parse_error(
2696 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2697 CHECK_NULL);
2698 }
2699 runtime_visible_type_annotations_length = method_attribute_length;
2700 runtime_visible_type_annotations = cfs->get_u1_buffer();
2701 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2702 // No need for the VM to parse Type annotations
2703 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2704 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2705 if (runtime_invisible_type_annotations_exists) {
2706 classfile_parse_error(
2707 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2708 CHECK_NULL);
2709 } else {
2710 runtime_invisible_type_annotations_exists = true;
2711 }
2712 if (PreserveAllAnnotations) {
2713 runtime_invisible_type_annotations_length = method_attribute_length;
2714 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2715 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2716 }
2717 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2718 } else {
2719 // Skip unknown attributes
2720 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2721 }
2722 } else {
2723 // Skip unknown attributes
2724 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2725 }
2726 }
2727
2728 if (linenumber_table != NULL) {
2729 linenumber_table->write_terminator();
2730 linenumber_table_length = linenumber_table->position();
2731 }
2732
2733 // Make sure there's at least one Code attribute in non-native/non-abstract method
2734 if (_need_verify) {
2735 guarantee_property(access_flags.is_native() ||
2736 access_flags.is_abstract() ||
2737 parsed_code_attribute,
2738 "Absent Code attribute in method that is not native or abstract in class file %s",
2739 CHECK_NULL);
2740 }
2741
2742 // All sizing information for a Method* is finally available, now create it
2743 InlineTableSizes sizes(
2744 total_lvt_length,
2745 linenumber_table_length,
2746 exception_table_length,
2747 checked_exceptions_length,
2748 method_parameters_length,
2749 generic_signature_index,
2750 runtime_visible_annotations_length +
2751 runtime_invisible_annotations_length,
2752 runtime_visible_parameter_annotations_length +
2753 runtime_invisible_parameter_annotations_length,
2754 runtime_visible_type_annotations_length +
2755 runtime_invisible_type_annotations_length,
2756 annotation_default_length,
2757 0);
2758
2759 Method* const m = Method::allocate(_loader_data,
2760 code_length,
2761 access_flags,
2762 &sizes,
2763 ConstMethod::NORMAL,
2764 CHECK_NULL);
2765
2766 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2767
2768 // Fill in information from fixed part (access_flags already set)
2769 m->set_constants(_cp);
2770 m->set_name_index(name_index);
2771 m->set_signature_index(signature_index);
2772
2773 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2774 m->constMethod()->set_result_type(rtf.type());
2775
2776 if (args_size >= 0) {
2777 m->set_size_of_parameters(args_size);
2778 } else {
2779 m->compute_size_of_parameters(THREAD);
2780 }
2781 #ifdef ASSERT
2782 if (args_size >= 0) {
2783 m->compute_size_of_parameters(THREAD);
2784 assert(args_size == m->size_of_parameters(), "");
2785 }
2786 #endif
2787
2788 // Fill in code attribute information
2789 m->set_max_stack(max_stack);
2790 m->set_max_locals(max_locals);
2791 if (stackmap_data != NULL) {
2792 m->constMethod()->copy_stackmap_data(_loader_data,
2793 (u1*)stackmap_data,
2794 stackmap_data_length,
2795 CHECK_NULL);
2796 }
2797
2798 // Copy byte codes
2799 m->set_code((u1*)code_start);
2800
2801 // Copy line number table
2802 if (linenumber_table != NULL) {
2803 memcpy(m->compressed_linenumber_table(),
2804 linenumber_table->buffer(),
2805 linenumber_table_length);
2806 }
2807
2808 // Copy exception table
2809 if (exception_table_length > 0) {
2810 int size =
2811 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2812 copy_u2_with_conversion((u2*) m->exception_table_start(),
2813 exception_table_start, size);
2814 }
2815
2816 // Copy method parameters
2817 if (method_parameters_length > 0) {
2818 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2819 for (int i = 0; i < method_parameters_length; i++) {
2820 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2821 method_parameters_data += 2;
2822 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2823 method_parameters_data += 2;
2824 }
2825 }
2826
2827 // Copy checked exceptions
2828 if (checked_exceptions_length > 0) {
2829 const int size =
2830 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2831 copy_u2_with_conversion((u2*) m->checked_exceptions_start(),
2832 checked_exceptions_start,
2833 size);
2834 }
2835
2836 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2837 if (total_lvt_length > 0) {
2838 promoted_flags->set_has_localvariable_table();
2839 copy_localvariable_table(m->constMethod(),
2840 lvt_cnt,
2841 localvariable_table_length,
2842 localvariable_table_start,
2843 lvtt_cnt,
2844 localvariable_type_table_length,
2845 localvariable_type_table_start,
2846 CHECK_NULL);
2847 }
2848
2849 if (parsed_annotations.has_any_annotations())
2850 parsed_annotations.apply_to(m);
2851
2852 // Copy annotations
2853 copy_method_annotations(m->constMethod(),
2854 runtime_visible_annotations,
2855 runtime_visible_annotations_length,
2856 runtime_invisible_annotations,
2857 runtime_invisible_annotations_length,
2858 runtime_visible_parameter_annotations,
2859 runtime_visible_parameter_annotations_length,
2860 runtime_invisible_parameter_annotations,
2861 runtime_invisible_parameter_annotations_length,
2862 runtime_visible_type_annotations,
2863 runtime_visible_type_annotations_length,
2864 runtime_invisible_type_annotations,
2865 runtime_invisible_type_annotations_length,
2866 annotation_default,
2867 annotation_default_length,
2868 CHECK_NULL);
2869
2870 if (name == vmSymbols::finalize_method_name() &&
2871 signature == vmSymbols::void_method_signature()) {
2872 if (m->is_empty_method()) {
2873 _has_empty_finalizer = true;
2874 } else {
2875 _has_finalizer = true;
2876 }
2877 }
2878 if (name == vmSymbols::object_initializer_name() &&
2879 signature == vmSymbols::void_method_signature() &&
2880 m->is_vanilla_constructor()) {
2881 _has_vanilla_constructor = true;
2882 }
2883
2884 NOT_PRODUCT(m->verify());
2885 return m;
2886 }
2887
2888
2889 // The promoted_flags parameter is used to pass relevant access_flags
2890 // from the methods back up to the containing klass. These flag values
2891 // are added to klass's access_flags.
2892 // Side-effects: populates the _methods field in the parser
2893 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2894 bool is_interface,
2895 AccessFlags* promoted_flags,
2896 bool* has_final_method,
2897 bool* declares_nonstatic_concrete_methods,
2898 TRAPS) {
2899 assert(cfs != NULL, "invariant");
2900 assert(promoted_flags != NULL, "invariant");
2901 assert(has_final_method != NULL, "invariant");
2902 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2903
2904 assert(NULL == _methods, "invariant");
2905
2906 cfs->guarantee_more(2, CHECK); // length
2907 const u2 length = cfs->get_u2_fast();
2908 if (length == 0) {
2909 _methods = Universe::the_empty_method_array();
2910 } else {
2911 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2912 length,
2913 NULL,
2914 CHECK);
2915
2916 for (int index = 0; index < length; index++) {
2917 Method* method = parse_method(cfs,
2918 is_interface,
2919 _cp,
2920 promoted_flags,
2921 CHECK);
2922
2923 if (method->is_final()) {
2924 *has_final_method = true;
2925 }
2926 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2927 // used for interface initialization, and default method inheritance analysis
2928 if (is_interface && !(*declares_nonstatic_concrete_methods)
2929 && !method->is_abstract() && !method->is_static()) {
2930 *declares_nonstatic_concrete_methods = true;
2931 }
2932 _methods->at_put(index, method);
2933 }
2934
2935 if (_need_verify && length > 1) {
2936 // Check duplicated methods
2937 ResourceMark rm(THREAD);
2938 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2939 THREAD, NameSigHash*, HASH_ROW_SIZE);
2940 initialize_hashtable(names_and_sigs);
2941 bool dup = false;
2942 const Symbol* name = NULL;
2943 const Symbol* sig = NULL;
2944 {
2945 debug_only(NoSafepointVerifier nsv;)
2946 for (int i = 0; i < length; i++) {
2947 const Method* const m = _methods->at(i);
2948 name = m->name();
2949 sig = m->signature();
2950 // If no duplicates, add name/signature in hashtable names_and_sigs.
2951 if (!put_after_lookup(name, sig, names_and_sigs)) {
2952 dup = true;
2953 break;
2954 }
2955 }
2956 }
2957 if (dup) {
2958 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2959 name->as_C_string(), sig->as_klass_external_name(), CHECK);
2960 }
2961 }
2962 }
2963 }
2964
2965 static const intArray* sort_methods(Array<Method*>* methods) {
2966 const int length = methods->length();
2967 // If JVMTI original method ordering or sharing is enabled we have to
2968 // remember the original class file ordering.
2969 // We temporarily use the vtable_index field in the Method* to store the
2970 // class file index, so we can read in after calling qsort.
2971 // Put the method ordering in the shared archive.
2972 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2973 for (int index = 0; index < length; index++) {
2974 Method* const m = methods->at(index);
2975 assert(!m->valid_vtable_index(), "vtable index should not be set");
2976 m->set_vtable_index(index);
2977 }
2978 }
2979 // Sort method array by ascending method name (for faster lookups & vtable construction)
2980 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2981 Method::sort_methods(methods);
2982
2983 intArray* method_ordering = NULL;
2984 // If JVMTI original method ordering or sharing is enabled construct int
2985 // array remembering the original ordering
2986 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2987 method_ordering = new intArray(length, length, -1);
2988 for (int index = 0; index < length; index++) {
2989 Method* const m = methods->at(index);
2990 const int old_index = m->vtable_index();
2991 assert(old_index >= 0 && old_index < length, "invalid method index");
2992 method_ordering->at_put(index, old_index);
2993 m->set_vtable_index(Method::invalid_vtable_index);
2994 }
2995 }
2996 return method_ordering;
2997 }
2998
2999 // Parse generic_signature attribute for methods and fields
3000 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3001 TRAPS) {
3002 assert(cfs != NULL, "invariant");
3003
3004 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3005 const u2 generic_signature_index = cfs->get_u2_fast();
3006 check_property(
3007 valid_symbol_at(generic_signature_index),
3008 "Invalid Signature attribute at constant pool index %u in class file %s",
3009 generic_signature_index, CHECK_0);
3010 return generic_signature_index;
3011 }
3012
3013 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3014 TRAPS) {
3015
3016 assert(cfs != NULL, "invariant");
3017
3018 cfs->guarantee_more(2, CHECK); // sourcefile_index
3019 const u2 sourcefile_index = cfs->get_u2_fast();
3020 check_property(
3021 valid_symbol_at(sourcefile_index),
3022 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3023 sourcefile_index, CHECK);
3024 set_class_sourcefile_index(sourcefile_index);
3025 }
3026
3027 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3028 int length,
3029 TRAPS) {
3030 assert(cfs != NULL, "invariant");
3031
3032 const u1* const sde_buffer = cfs->get_u1_buffer();
3033 assert(sde_buffer != NULL, "null sde buffer");
3034
3035 // Don't bother storing it if there is no way to retrieve it
3036 if (JvmtiExport::can_get_source_debug_extension()) {
3037 assert((length+1) > length, "Overflow checking");
3038 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3039 for (int i = 0; i < length; i++) {
3040 sde[i] = sde_buffer[i];
3041 }
3042 sde[length] = '\0';
3043 set_class_sde_buffer((const char*)sde, length);
3044 }
3045 // Got utf8 string, set stream position forward
3046 cfs->skip_u1(length, CHECK);
3047 }
3048
3049
3050 // Inner classes can be static, private or protected (classic VM does this)
3051 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3052 JVM_ACC_PRIVATE | \
3053 JVM_ACC_PROTECTED | \
3054 JVM_ACC_STATIC \
3055 )
3056
3057 // Return number of classes in the inner classes attribute table
3058 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3059 const u1* const inner_classes_attribute_start,
3060 bool parsed_enclosingmethod_attribute,
3061 u2 enclosing_method_class_index,
3062 u2 enclosing_method_method_index,
3063 TRAPS) {
3064 const u1* const current_mark = cfs->current();
3065 u2 length = 0;
3066 if (inner_classes_attribute_start != NULL) {
3067 cfs->set_current(inner_classes_attribute_start);
3068 cfs->guarantee_more(2, CHECK_0); // length
3069 length = cfs->get_u2_fast();
3070 }
3071
3072 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3073 // method data:
3074 // [inner_class_info_index,
3075 // outer_class_info_index,
3076 // inner_name_index,
3077 // inner_class_access_flags,
3078 // ...
3079 // enclosing_method_class_index,
3080 // enclosing_method_method_index]
3081 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3082 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3083 _inner_classes = inner_classes;
3084
3085 int index = 0;
3086 const int cp_size = _cp->length();
3087 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3088 for (int n = 0; n < length; n++) {
3089 // Inner class index
3090 const u2 inner_class_info_index = cfs->get_u2_fast();
3091 check_property(
3092 valid_klass_reference_at(inner_class_info_index),
3093 "inner_class_info_index %u has bad constant type in class file %s",
3094 inner_class_info_index, CHECK_0);
3095 // Outer class index
3096 const u2 outer_class_info_index = cfs->get_u2_fast();
3097 check_property(
3098 outer_class_info_index == 0 ||
3099 valid_klass_reference_at(outer_class_info_index),
3100 "outer_class_info_index %u has bad constant type in class file %s",
3101 outer_class_info_index, CHECK_0);
3102 // Inner class name
3103 const u2 inner_name_index = cfs->get_u2_fast();
3104 check_property(
3105 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3106 "inner_name_index %u has bad constant type in class file %s",
3107 inner_name_index, CHECK_0);
3108 if (_need_verify) {
3109 guarantee_property(inner_class_info_index != outer_class_info_index,
3110 "Class is both outer and inner class in class file %s", CHECK_0);
3111 }
3112 // Access flags
3113 jint flags;
3114 // JVM_ACC_MODULE is defined in JDK-9 and later.
3115 if (_major_version >= JAVA_9_VERSION) {
3116 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3117 } else {
3118 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3119 }
3120 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3121 // Set abstract bit for old class files for backward compatibility
3122 flags |= JVM_ACC_ABSTRACT;
3123 }
3124 verify_legal_class_modifiers(flags, CHECK_0);
3125 AccessFlags inner_access_flags(flags);
3126
3127 inner_classes->at_put(index++, inner_class_info_index);
3128 inner_classes->at_put(index++, outer_class_info_index);
3129 inner_classes->at_put(index++, inner_name_index);
3130 inner_classes->at_put(index++, inner_access_flags.as_short());
3131 }
3132
3133 // 4347400: make sure there's no duplicate entry in the classes array
3134 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3135 for(int i = 0; i < length * 4; i += 4) {
3136 for(int j = i + 4; j < length * 4; j += 4) {
3137 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3138 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3139 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3140 inner_classes->at(i+3) != inner_classes->at(j+3)),
3141 "Duplicate entry in InnerClasses in class file %s",
3142 CHECK_0);
3143 }
3144 }
3145 }
3146
3147 // Set EnclosingMethod class and method indexes.
3148 if (parsed_enclosingmethod_attribute) {
3149 inner_classes->at_put(index++, enclosing_method_class_index);
3150 inner_classes->at_put(index++, enclosing_method_method_index);
3151 }
3152 assert(index == size, "wrong size");
3153
3154 // Restore buffer's current position.
3155 cfs->set_current(current_mark);
3156
3157 return length;
3158 }
3159
3160 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3161 set_class_synthetic_flag(true);
3162 }
3163
3164 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3165 assert(cfs != NULL, "invariant");
3166
3167 const u2 signature_index = cfs->get_u2(CHECK);
3168 check_property(
3169 valid_symbol_at(signature_index),
3170 "Invalid constant pool index %u in Signature attribute in class file %s",
3171 signature_index, CHECK);
3172 set_class_generic_signature_index(signature_index);
3173 }
3174
3175 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3176 ConstantPool* cp,
3177 u4 attribute_byte_length,
3178 TRAPS) {
3179 assert(cfs != NULL, "invariant");
3180 assert(cp != NULL, "invariant");
3181
3182 const u1* const current_start = cfs->current();
3183
3184 guarantee_property(attribute_byte_length >= sizeof(u2),
3185 "Invalid BootstrapMethods attribute length %u in class file %s",
3186 attribute_byte_length,
3187 CHECK);
3188
3189 cfs->guarantee_more(attribute_byte_length, CHECK);
3190
3191 const int attribute_array_length = cfs->get_u2_fast();
3192
3193 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3194 "Short length on BootstrapMethods in class file %s",
3195 CHECK);
3196
3197
3198 // The attribute contains a counted array of counted tuples of shorts,
3199 // represending bootstrap specifiers:
3200 // length*{bootstrap_method_index, argument_count*{argument_index}}
3201 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3202 // operand_count = number of shorts in attr, except for leading length
3203
3204 // The attribute is copied into a short[] array.
3205 // The array begins with a series of short[2] pairs, one for each tuple.
3206 const int index_size = (attribute_array_length * 2);
3207
3208 Array<u2>* const operands =
3209 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3210
3211 // Eagerly assign operands so they will be deallocated with the constant
3212 // pool if there is an error.
3213 cp->set_operands(operands);
3214
3215 int operand_fill_index = index_size;
3216 const int cp_size = cp->length();
3217
3218 for (int n = 0; n < attribute_array_length; n++) {
3219 // Store a 32-bit offset into the header of the operand array.
3220 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3221
3222 // Read a bootstrap specifier.
3223 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3224 const u2 bootstrap_method_index = cfs->get_u2_fast();
3225 const u2 argument_count = cfs->get_u2_fast();
3226 check_property(
3227 valid_cp_range(bootstrap_method_index, cp_size) &&
3228 cp->tag_at(bootstrap_method_index).is_method_handle(),
3229 "bootstrap_method_index %u has bad constant type in class file %s",
3230 bootstrap_method_index,
3231 CHECK);
3232
3233 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3234 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3235 CHECK);
3236
3237 operands->at_put(operand_fill_index++, bootstrap_method_index);
3238 operands->at_put(operand_fill_index++, argument_count);
3239
3240 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3241 for (int j = 0; j < argument_count; j++) {
3242 const u2 argument_index = cfs->get_u2_fast();
3243 check_property(
3244 valid_cp_range(argument_index, cp_size) &&
3245 cp->tag_at(argument_index).is_loadable_constant(),
3246 "argument_index %u has bad constant type in class file %s",
3247 argument_index,
3248 CHECK);
3249 operands->at_put(operand_fill_index++, argument_index);
3250 }
3251 }
3252 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3253 "Bad length on BootstrapMethods in class file %s",
3254 CHECK);
3255 }
3256
3257 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3258 ConstantPool* cp,
3259 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3260 TRAPS) {
3261 assert(cfs != NULL, "invariant");
3262 assert(cp != NULL, "invariant");
3263 assert(parsed_annotations != NULL, "invariant");
3264
3265 // Set inner classes attribute to default sentinel
3266 _inner_classes = Universe::the_empty_short_array();
3267 cfs->guarantee_more(2, CHECK); // attributes_count
3268 u2 attributes_count = cfs->get_u2_fast();
3269 bool parsed_sourcefile_attribute = false;
3270 bool parsed_innerclasses_attribute = false;
3271 bool parsed_enclosingmethod_attribute = false;
3272 bool parsed_bootstrap_methods_attribute = false;
3273 const u1* runtime_visible_annotations = NULL;
3274 int runtime_visible_annotations_length = 0;
3275 const u1* runtime_invisible_annotations = NULL;
3276 int runtime_invisible_annotations_length = 0;
3277 const u1* runtime_visible_type_annotations = NULL;
3278 int runtime_visible_type_annotations_length = 0;
3279 const u1* runtime_invisible_type_annotations = NULL;
3280 int runtime_invisible_type_annotations_length = 0;
3281 bool runtime_invisible_type_annotations_exists = false;
3282 bool runtime_invisible_annotations_exists = false;
3283 bool parsed_source_debug_ext_annotations_exist = false;
3284 const u1* inner_classes_attribute_start = NULL;
3285 u4 inner_classes_attribute_length = 0;
3286 u2 enclosing_method_class_index = 0;
3287 u2 enclosing_method_method_index = 0;
3288 // Iterate over attributes
3289 while (attributes_count--) {
3290 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3291 const u2 attribute_name_index = cfs->get_u2_fast();
3292 const u4 attribute_length = cfs->get_u4_fast();
3293 check_property(
3294 valid_symbol_at(attribute_name_index),
3295 "Attribute name has bad constant pool index %u in class file %s",
3296 attribute_name_index, CHECK);
3297 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3298 if (tag == vmSymbols::tag_source_file()) {
3299 // Check for SourceFile tag
3300 if (_need_verify) {
3301 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3302 }
3303 if (parsed_sourcefile_attribute) {
3304 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3305 } else {
3306 parsed_sourcefile_attribute = true;
3307 }
3308 parse_classfile_sourcefile_attribute(cfs, CHECK);
3309 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3310 // Check for SourceDebugExtension tag
3311 if (parsed_source_debug_ext_annotations_exist) {
3312 classfile_parse_error(
3313 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3314 }
3315 parsed_source_debug_ext_annotations_exist = true;
3316 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3317 } else if (tag == vmSymbols::tag_inner_classes()) {
3318 // Check for InnerClasses tag
3319 if (parsed_innerclasses_attribute) {
3320 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3321 } else {
3322 parsed_innerclasses_attribute = true;
3323 }
3324 inner_classes_attribute_start = cfs->get_u1_buffer();
3325 inner_classes_attribute_length = attribute_length;
3326 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3327 } else if (tag == vmSymbols::tag_synthetic()) {
3328 // Check for Synthetic tag
3329 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3330 if (attribute_length != 0) {
3331 classfile_parse_error(
3332 "Invalid Synthetic classfile attribute length %u in class file %s",
3333 attribute_length, CHECK);
3334 }
3335 parse_classfile_synthetic_attribute(CHECK);
3336 } else if (tag == vmSymbols::tag_deprecated()) {
3337 // Check for Deprecatd tag - 4276120
3338 if (attribute_length != 0) {
3339 classfile_parse_error(
3340 "Invalid Deprecated classfile attribute length %u in class file %s",
3341 attribute_length, CHECK);
3342 }
3343 } else if (_major_version >= JAVA_1_5_VERSION) {
3344 if (tag == vmSymbols::tag_signature()) {
3345 if (_generic_signature_index != 0) {
3346 classfile_parse_error(
3347 "Multiple Signature attributes in class file %s", CHECK);
3348 }
3349 if (attribute_length != 2) {
3350 classfile_parse_error(
3351 "Wrong Signature attribute length %u in class file %s",
3352 attribute_length, CHECK);
3353 }
3354 parse_classfile_signature_attribute(cfs, CHECK);
3355 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3356 if (runtime_visible_annotations != NULL) {
3357 classfile_parse_error(
3358 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3359 }
3360 runtime_visible_annotations_length = attribute_length;
3361 runtime_visible_annotations = cfs->get_u1_buffer();
3362 assert(runtime_visible_annotations != NULL, "null visible annotations");
3363 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3364 parse_annotations(cp,
3365 runtime_visible_annotations,
3366 runtime_visible_annotations_length,
3367 parsed_annotations,
3368 _loader_data,
3369 CHECK);
3370 cfs->skip_u1_fast(runtime_visible_annotations_length);
3371 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3372 if (runtime_invisible_annotations_exists) {
3373 classfile_parse_error(
3374 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3375 }
3376 runtime_invisible_annotations_exists = true;
3377 if (PreserveAllAnnotations) {
3378 runtime_invisible_annotations_length = attribute_length;
3379 runtime_invisible_annotations = cfs->get_u1_buffer();
3380 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3381 }
3382 cfs->skip_u1(attribute_length, CHECK);
3383 } else if (tag == vmSymbols::tag_enclosing_method()) {
3384 if (parsed_enclosingmethod_attribute) {
3385 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3386 } else {
3387 parsed_enclosingmethod_attribute = true;
3388 }
3389 guarantee_property(attribute_length == 4,
3390 "Wrong EnclosingMethod attribute length %u in class file %s",
3391 attribute_length, CHECK);
3392 cfs->guarantee_more(4, CHECK); // class_index, method_index
3393 enclosing_method_class_index = cfs->get_u2_fast();
3394 enclosing_method_method_index = cfs->get_u2_fast();
3395 if (enclosing_method_class_index == 0) {
3396 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3397 }
3398 // Validate the constant pool indices and types
3399 check_property(valid_klass_reference_at(enclosing_method_class_index),
3400 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3401 if (enclosing_method_method_index != 0 &&
3402 (!cp->is_within_bounds(enclosing_method_method_index) ||
3403 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3404 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3405 }
3406 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3407 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3408 if (parsed_bootstrap_methods_attribute) {
3409 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3410 }
3411 parsed_bootstrap_methods_attribute = true;
3412 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3413 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3414 if (runtime_visible_type_annotations != NULL) {
3415 classfile_parse_error(
3416 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3417 }
3418 runtime_visible_type_annotations_length = attribute_length;
3419 runtime_visible_type_annotations = cfs->get_u1_buffer();
3420 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3421 // No need for the VM to parse Type annotations
3422 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3423 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3424 if (runtime_invisible_type_annotations_exists) {
3425 classfile_parse_error(
3426 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3427 } else {
3428 runtime_invisible_type_annotations_exists = true;
3429 }
3430 if (PreserveAllAnnotations) {
3431 runtime_invisible_type_annotations_length = attribute_length;
3432 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3433 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3434 }
3435 cfs->skip_u1(attribute_length, CHECK);
3436 } else {
3437 // Unknown attribute
3438 cfs->skip_u1(attribute_length, CHECK);
3439 }
3440 } else {
3441 // Unknown attribute
3442 cfs->skip_u1(attribute_length, CHECK);
3443 }
3444 }
3445 _annotations = assemble_annotations(runtime_visible_annotations,
3446 runtime_visible_annotations_length,
3447 runtime_invisible_annotations,
3448 runtime_invisible_annotations_length,
3449 CHECK);
3450 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3451 runtime_visible_type_annotations_length,
3452 runtime_invisible_type_annotations,
3453 runtime_invisible_type_annotations_length,
3454 CHECK);
3455
3456 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3457 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3458 cfs,
3459 inner_classes_attribute_start,
3460 parsed_innerclasses_attribute,
3461 enclosing_method_class_index,
3462 enclosing_method_method_index,
3463 CHECK);
3464 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3465 guarantee_property(
3466 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3467 "Wrong InnerClasses attribute length in class file %s", CHECK);
3468 }
3469 }
3470
3471 if (_max_bootstrap_specifier_index >= 0) {
3472 guarantee_property(parsed_bootstrap_methods_attribute,
3473 "Missing BootstrapMethods attribute in class file %s", CHECK);
3474 }
3475 }
3476
3477 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3478 assert(k != NULL, "invariant");
3479
3480 if (_synthetic_flag)
3481 k->set_is_synthetic();
3482 if (_sourcefile_index != 0) {
3483 k->set_source_file_name_index(_sourcefile_index);
3484 }
3485 if (_generic_signature_index != 0) {
3486 k->set_generic_signature_index(_generic_signature_index);
3487 }
3488 if (_sde_buffer != NULL) {
3489 k->set_source_debug_extension(_sde_buffer, _sde_length);
3490 }
3491 }
3492
3493 // Create the Annotations object that will
3494 // hold the annotations array for the Klass.
3495 void ClassFileParser::create_combined_annotations(TRAPS) {
3496 if (_annotations == NULL &&
3497 _type_annotations == NULL &&
3498 _fields_annotations == NULL &&
3499 _fields_type_annotations == NULL) {
3500 // Don't create the Annotations object unnecessarily.
3501 return;
3502 }
3503
3504 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3505 annotations->set_class_annotations(_annotations);
3506 annotations->set_class_type_annotations(_type_annotations);
3507 annotations->set_fields_annotations(_fields_annotations);
3508 annotations->set_fields_type_annotations(_fields_type_annotations);
3509
3510 // This is the Annotations object that will be
3511 // assigned to InstanceKlass being constructed.
3512 _combined_annotations = annotations;
3513
3514 // The annotations arrays below has been transfered the
3515 // _combined_annotations so these fields can now be cleared.
3516 _annotations = NULL;
3517 _type_annotations = NULL;
3518 _fields_annotations = NULL;
3519 _fields_type_annotations = NULL;
3520 }
3521
3522 // Transfer ownership of metadata allocated to the InstanceKlass.
3523 void ClassFileParser::apply_parsed_class_metadata(
3524 InstanceKlass* this_klass,
3525 int java_fields_count, TRAPS) {
3526 assert(this_klass != NULL, "invariant");
3527
3528 _cp->set_pool_holder(this_klass);
3529 this_klass->set_constants(_cp);
3530 this_klass->set_fields(_fields, java_fields_count);
3531 this_klass->set_methods(_methods);
3532 this_klass->set_inner_classes(_inner_classes);
3533 this_klass->set_local_interfaces(_local_interfaces);
3534 this_klass->set_transitive_interfaces(_transitive_interfaces);
3535 this_klass->set_annotations(_combined_annotations);
3536
3537 // Clear out these fields so they don't get deallocated by the destructor
3538 clear_class_metadata();
3539 }
3540
3541 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3542 int runtime_visible_annotations_length,
3543 const u1* const runtime_invisible_annotations,
3544 int runtime_invisible_annotations_length,
3545 TRAPS) {
3546 AnnotationArray* annotations = NULL;
3547 if (runtime_visible_annotations != NULL ||
3548 runtime_invisible_annotations != NULL) {
3549 annotations = MetadataFactory::new_array<u1>(_loader_data,
3550 runtime_visible_annotations_length +
3551 runtime_invisible_annotations_length,
3552 CHECK_(annotations));
3553 if (runtime_visible_annotations != NULL) {
3554 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3555 annotations->at_put(i, runtime_visible_annotations[i]);
3556 }
3557 }
3558 if (runtime_invisible_annotations != NULL) {
3559 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3560 int append = runtime_visible_annotations_length+i;
3561 annotations->at_put(append, runtime_invisible_annotations[i]);
3562 }
3563 }
3564 }
3565 return annotations;
3566 }
3567
3568 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3569 const int super_class_index,
3570 const bool need_verify,
3571 TRAPS) {
3572 assert(cp != NULL, "invariant");
3573 const InstanceKlass* super_klass = NULL;
3574
3575 if (super_class_index == 0) {
3576 check_property(_class_name == vmSymbols::java_lang_Object(),
3577 "Invalid superclass index %u in class file %s",
3578 super_class_index,
3579 CHECK_NULL);
3580 } else {
3581 check_property(valid_klass_reference_at(super_class_index),
3582 "Invalid superclass index %u in class file %s",
3583 super_class_index,
3584 CHECK_NULL);
3585 // The class name should be legal because it is checked when parsing constant pool.
3586 // However, make sure it is not an array type.
3587 bool is_array = false;
3588 if (cp->tag_at(super_class_index).is_klass()) {
3589 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3590 if (need_verify)
3591 is_array = super_klass->is_array_klass();
3592 } else if (need_verify) {
3593 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3594 }
3595 if (need_verify) {
3596 guarantee_property(!is_array,
3597 "Bad superclass name in class file %s", CHECK_NULL);
3598 }
3599 }
3600 return super_klass;
3601 }
3602
3603 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3604 unsigned int nonstatic_oop_map_count,
3605 int first_nonstatic_oop_offset) {
3606
3607 unsigned int map_count =
3608 NULL == super ? 0 : super->nonstatic_oop_map_count();
3609 if (nonstatic_oop_map_count > 0) {
3610 // We have oops to add to map
3611 if (map_count == 0) {
3612 map_count = nonstatic_oop_map_count;
3613 }
3614 else {
3615 // Check whether we should add a new map block or whether the last one can
3616 // be extended
3617 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3618 const OopMapBlock* const last_map = first_map + map_count - 1;
3619
3620 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3621 if (next_offset == first_nonstatic_oop_offset) {
3622 // There is no gap bettwen superklass's last oop field and first
3623 // local oop field, merge maps.
3624 nonstatic_oop_map_count -= 1;
3625 }
3626 else {
3627 // Superklass didn't end with a oop field, add extra maps
3628 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3629 }
3630 map_count += nonstatic_oop_map_count;
3631 }
3632 }
3633 return map_count;
3634 }
3635
3636 #ifndef PRODUCT
3637 static void print_field_layout(const Symbol* name,
3638 Array<u2>* fields,
3639 constantPoolHandle cp,
3640 int instance_size,
3641 int instance_fields_start,
3642 int instance_fields_end,
3643 int static_fields_end) {
3644
3645 assert(name != NULL, "invariant");
3646
3647 tty->print("%s: field layout\n", name->as_klass_external_name());
3648 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3649 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3650 if (!fs.access_flags().is_static()) {
3651 tty->print(" @%3d \"%s\" %s\n",
3652 fs.offset(),
3653 fs.name()->as_klass_external_name(),
3654 fs.signature()->as_klass_external_name());
3655 }
3656 }
3657 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3658 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3659 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3660 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3661 if (fs.access_flags().is_static()) {
3662 tty->print(" @%3d \"%s\" %s\n",
3663 fs.offset(),
3664 fs.name()->as_klass_external_name(),
3665 fs.signature()->as_klass_external_name());
3666 }
3667 }
3668 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3669 tty->print("\n");
3670 }
3671 #endif
3672
3673 // Values needed for oopmap and InstanceKlass creation
3674 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3675 public:
3676 int* nonstatic_oop_offsets;
3677 unsigned int* nonstatic_oop_counts;
3678 unsigned int nonstatic_oop_map_count;
3679 unsigned int total_oop_map_count;
3680 int instance_size;
3681 int nonstatic_field_size;
3682 int static_field_size;
3683 bool has_nonstatic_fields;
3684 };
3685
3686 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3687 void ClassFileParser::layout_fields(ConstantPool* cp,
3688 const FieldAllocationCount* fac,
3689 const ClassAnnotationCollector* parsed_annotations,
3690 FieldLayoutInfo* info,
3691 TRAPS) {
3692
3693 assert(cp != NULL, "invariant");
3694
3695 // Field size and offset computation
3696 int nonstatic_field_size = _super_klass == NULL ? 0 :
3697 _super_klass->nonstatic_field_size();
3698
3699 // Count the contended fields by type.
3700 //
3701 // We ignore static fields, because @Contended is not supported for them.
3702 // The layout code below will also ignore the static fields.
3703 int nonstatic_contended_count = 0;
3704 FieldAllocationCount fac_contended;
3705 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3706 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3707 if (fs.is_contended()) {
3708 fac_contended.count[atype]++;
3709 if (!fs.access_flags().is_static()) {
3710 nonstatic_contended_count++;
3711 }
3712 }
3713 }
3714
3715
3716 // Calculate the starting byte offsets
3717 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3718 int next_static_double_offset = next_static_oop_offset +
3719 ((fac->count[STATIC_OOP]) * heapOopSize);
3720 if ( fac->count[STATIC_DOUBLE] &&
3721 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3722 Universe::field_type_should_be_aligned(T_LONG)) ) {
3723 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3724 }
3725
3726 int next_static_word_offset = next_static_double_offset +
3727 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3728 int next_static_short_offset = next_static_word_offset +
3729 ((fac->count[STATIC_WORD]) * BytesPerInt);
3730 int next_static_byte_offset = next_static_short_offset +
3731 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3732
3733 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3734 nonstatic_field_size * heapOopSize;
3735
3736 int next_nonstatic_field_offset = nonstatic_fields_start;
3737
3738 const bool is_contended_class = parsed_annotations->is_contended();
3739
3740 // Class is contended, pad before all the fields
3741 if (is_contended_class) {
3742 next_nonstatic_field_offset += ContendedPaddingWidth;
3743 }
3744
3745 // Compute the non-contended fields count.
3746 // The packing code below relies on these counts to determine if some field
3747 // can be squeezed into the alignment gap. Contended fields are obviously
3748 // exempt from that.
3749 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3750 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3751 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3752 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3753 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3754
3755 // Total non-static fields count, including every contended field
3756 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3757 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3758 fac->count[NONSTATIC_OOP];
3759
3760 const bool super_has_nonstatic_fields =
3761 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3762 const bool has_nonstatic_fields =
3763 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3764
3765
3766 // Prepare list of oops for oop map generation.
3767 //
3768 // "offset" and "count" lists are describing the set of contiguous oop
3769 // regions. offset[i] is the start of the i-th region, which then has
3770 // count[i] oops following. Before we know how many regions are required,
3771 // we pessimistically allocate the maps to fit all the oops into the
3772 // distinct regions.
3773 //
3774 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3775 // to figure out if we still need to do this.
3776 unsigned int nonstatic_oop_map_count = 0;
3777 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3778
3779 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3780 THREAD, int, max_nonstatic_oop_maps);
3781 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3782 THREAD, unsigned int, max_nonstatic_oop_maps);
3783
3784 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3785
3786 bool compact_fields = CompactFields;
3787 int allocation_style = FieldsAllocationStyle;
3788 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3789 assert(false, "0 <= FieldsAllocationStyle <= 2");
3790 allocation_style = 1; // Optimistic
3791 }
3792
3793 // The next classes have predefined hard-coded fields offsets
3794 // (see in JavaClasses::compute_hard_coded_offsets()).
3795 // Use default fields allocation order for them.
3796 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3797 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3798 _class_name == vmSymbols::java_lang_Class() ||
3799 _class_name == vmSymbols::java_lang_ClassLoader() ||
3800 _class_name == vmSymbols::java_lang_ref_Reference() ||
3801 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3802 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3803 _class_name == vmSymbols::java_lang_String() ||
3804 _class_name == vmSymbols::java_lang_Throwable() ||
3805 _class_name == vmSymbols::java_lang_Boolean() ||
3806 _class_name == vmSymbols::java_lang_Character() ||
3807 _class_name == vmSymbols::java_lang_Float() ||
3808 _class_name == vmSymbols::java_lang_Double() ||
3809 _class_name == vmSymbols::java_lang_Byte() ||
3810 _class_name == vmSymbols::java_lang_Short() ||
3811 _class_name == vmSymbols::java_lang_Integer() ||
3812 _class_name == vmSymbols::java_lang_Long())) {
3813 allocation_style = 0; // Allocate oops first
3814 compact_fields = false; // Don't compact fields
3815 }
3816
3817 int next_nonstatic_oop_offset = 0;
3818 int next_nonstatic_double_offset = 0;
3819
3820 // Rearrange fields for a given allocation style
3821 if( allocation_style == 0 ) {
3822 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3823 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3824 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3825 (nonstatic_oop_count * heapOopSize);
3826 } else if( allocation_style == 1 ) {
3827 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3828 next_nonstatic_double_offset = next_nonstatic_field_offset;
3829 } else if( allocation_style == 2 ) {
3830 // Fields allocation: oops fields in super and sub classes are together.
3831 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3832 _super_klass->nonstatic_oop_map_size() > 0 ) {
3833 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3834 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3835 const OopMapBlock* const last_map = first_map + map_count - 1;
3836 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3837 if (next_offset == next_nonstatic_field_offset) {
3838 allocation_style = 0; // allocate oops first
3839 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3840 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3841 (nonstatic_oop_count * heapOopSize);
3842 }
3843 }
3844 if( allocation_style == 2 ) {
3845 allocation_style = 1; // allocate oops last
3846 next_nonstatic_double_offset = next_nonstatic_field_offset;
3847 }
3848 } else {
3849 ShouldNotReachHere();
3850 }
3851
3852 int nonstatic_oop_space_count = 0;
3853 int nonstatic_word_space_count = 0;
3854 int nonstatic_short_space_count = 0;
3855 int nonstatic_byte_space_count = 0;
3856 int nonstatic_oop_space_offset = 0;
3857 int nonstatic_word_space_offset = 0;
3858 int nonstatic_short_space_offset = 0;
3859 int nonstatic_byte_space_offset = 0;
3860
3861 // Try to squeeze some of the fields into the gaps due to
3862 // long/double alignment.
3863 if (nonstatic_double_count > 0) {
3864 int offset = next_nonstatic_double_offset;
3865 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3866 if (compact_fields && offset != next_nonstatic_double_offset) {
3867 // Allocate available fields into the gap before double field.
3868 int length = next_nonstatic_double_offset - offset;
3869 assert(length == BytesPerInt, "");
3870 nonstatic_word_space_offset = offset;
3871 if (nonstatic_word_count > 0) {
3872 nonstatic_word_count -= 1;
3873 nonstatic_word_space_count = 1; // Only one will fit
3874 length -= BytesPerInt;
3875 offset += BytesPerInt;
3876 }
3877 nonstatic_short_space_offset = offset;
3878 while (length >= BytesPerShort && nonstatic_short_count > 0) {
3879 nonstatic_short_count -= 1;
3880 nonstatic_short_space_count += 1;
3881 length -= BytesPerShort;
3882 offset += BytesPerShort;
3883 }
3884 nonstatic_byte_space_offset = offset;
3885 while (length > 0 && nonstatic_byte_count > 0) {
3886 nonstatic_byte_count -= 1;
3887 nonstatic_byte_space_count += 1;
3888 length -= 1;
3889 }
3890 // Allocate oop field in the gap if there are no other fields for that.
3891 nonstatic_oop_space_offset = offset;
3892 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3893 allocation_style != 0) { // when oop fields not first
3894 nonstatic_oop_count -= 1;
3895 nonstatic_oop_space_count = 1; // Only one will fit
3896 length -= heapOopSize;
3897 offset += heapOopSize;
3898 }
3899 }
3900 }
3901
3902 int next_nonstatic_word_offset = next_nonstatic_double_offset +
3903 (nonstatic_double_count * BytesPerLong);
3904 int next_nonstatic_short_offset = next_nonstatic_word_offset +
3905 (nonstatic_word_count * BytesPerInt);
3906 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3907 (nonstatic_short_count * BytesPerShort);
3908 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3909 nonstatic_byte_count;
3910
3911 // let oops jump before padding with this allocation style
3912 if( allocation_style == 1 ) {
3913 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3914 if( nonstatic_oop_count > 0 ) {
3915 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3916 }
3917 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3918 }
3919
3920 // Iterate over fields again and compute correct offsets.
3921 // The field allocation type was temporarily stored in the offset slot.
3922 // oop fields are located before non-oop fields (static and non-static).
3923 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3924
3925 // skip already laid out fields
3926 if (fs.is_offset_set()) continue;
3927
3928 // contended instance fields are handled below
3929 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3930
3931 int real_offset = 0;
3932 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3933
3934 // pack the rest of the fields
3935 switch (atype) {
3936 case STATIC_OOP:
3937 real_offset = next_static_oop_offset;
3938 next_static_oop_offset += heapOopSize;
3939 break;
3940 case STATIC_BYTE:
3941 real_offset = next_static_byte_offset;
3942 next_static_byte_offset += 1;
3943 break;
3944 case STATIC_SHORT:
3945 real_offset = next_static_short_offset;
3946 next_static_short_offset += BytesPerShort;
3947 break;
3948 case STATIC_WORD:
3949 real_offset = next_static_word_offset;
3950 next_static_word_offset += BytesPerInt;
3951 break;
3952 case STATIC_DOUBLE:
3953 real_offset = next_static_double_offset;
3954 next_static_double_offset += BytesPerLong;
3955 break;
3956 case NONSTATIC_OOP:
3957 if( nonstatic_oop_space_count > 0 ) {
3958 real_offset = nonstatic_oop_space_offset;
3959 nonstatic_oop_space_offset += heapOopSize;
3960 nonstatic_oop_space_count -= 1;
3961 } else {
3962 real_offset = next_nonstatic_oop_offset;
3963 next_nonstatic_oop_offset += heapOopSize;
3964 }
3965
3966 // Record this oop in the oop maps
3967 if( nonstatic_oop_map_count > 0 &&
3968 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3969 real_offset -
3970 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3971 heapOopSize ) {
3972 // This oop is adjacent to the previous one, add to current oop map
3973 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3974 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3975 } else {
3976 // This oop is not adjacent to the previous one, create new oop map
3977 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3978 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3979 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3980 nonstatic_oop_map_count += 1;
3981 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3982 first_nonstatic_oop_offset = real_offset;
3983 }
3984 }
3985 break;
3986 case NONSTATIC_BYTE:
3987 if( nonstatic_byte_space_count > 0 ) {
3988 real_offset = nonstatic_byte_space_offset;
3989 nonstatic_byte_space_offset += 1;
3990 nonstatic_byte_space_count -= 1;
3991 } else {
3992 real_offset = next_nonstatic_byte_offset;
3993 next_nonstatic_byte_offset += 1;
3994 }
3995 break;
3996 case NONSTATIC_SHORT:
3997 if( nonstatic_short_space_count > 0 ) {
3998 real_offset = nonstatic_short_space_offset;
3999 nonstatic_short_space_offset += BytesPerShort;
4000 nonstatic_short_space_count -= 1;
4001 } else {
4002 real_offset = next_nonstatic_short_offset;
4003 next_nonstatic_short_offset += BytesPerShort;
4004 }
4005 break;
4006 case NONSTATIC_WORD:
4007 if( nonstatic_word_space_count > 0 ) {
4008 real_offset = nonstatic_word_space_offset;
4009 nonstatic_word_space_offset += BytesPerInt;
4010 nonstatic_word_space_count -= 1;
4011 } else {
4012 real_offset = next_nonstatic_word_offset;
4013 next_nonstatic_word_offset += BytesPerInt;
4014 }
4015 break;
4016 case NONSTATIC_DOUBLE:
4017 real_offset = next_nonstatic_double_offset;
4018 next_nonstatic_double_offset += BytesPerLong;
4019 break;
4020 default:
4021 ShouldNotReachHere();
4022 }
4023 fs.set_offset(real_offset);
4024 }
4025
4026
4027 // Handle the contended cases.
4028 //
4029 // Each contended field should not intersect the cache line with another contended field.
4030 // In the absence of alignment information, we end up with pessimistically separating
4031 // the fields with full-width padding.
4032 //
4033 // Additionally, this should not break alignment for the fields, so we round the alignment up
4034 // for each field.
4035 if (nonstatic_contended_count > 0) {
4036
4037 // if there is at least one contended field, we need to have pre-padding for them
4038 next_nonstatic_padded_offset += ContendedPaddingWidth;
4039
4040 // collect all contended groups
4041 ResourceBitMap bm(cp->size());
4042 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4043 // skip already laid out fields
4044 if (fs.is_offset_set()) continue;
4045
4046 if (fs.is_contended()) {
4047 bm.set_bit(fs.contended_group());
4048 }
4049 }
4050
4051 int current_group = -1;
4052 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4053
4054 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4055
4056 // skip already laid out fields
4057 if (fs.is_offset_set()) continue;
4058
4059 // skip non-contended fields and fields from different group
4060 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4061
4062 // handle statics below
4063 if (fs.access_flags().is_static()) continue;
4064
4065 int real_offset = 0;
4066 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4067
4068 switch (atype) {
4069 case NONSTATIC_BYTE:
4070 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
4071 real_offset = next_nonstatic_padded_offset;
4072 next_nonstatic_padded_offset += 1;
4073 break;
4074
4075 case NONSTATIC_SHORT:
4076 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
4077 real_offset = next_nonstatic_padded_offset;
4078 next_nonstatic_padded_offset += BytesPerShort;
4079 break;
4080
4081 case NONSTATIC_WORD:
4082 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4083 real_offset = next_nonstatic_padded_offset;
4084 next_nonstatic_padded_offset += BytesPerInt;
4085 break;
4086
4087 case NONSTATIC_DOUBLE:
4088 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4089 real_offset = next_nonstatic_padded_offset;
4090 next_nonstatic_padded_offset += BytesPerLong;
4091 break;
4092
4093 case NONSTATIC_OOP:
4094 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4095 real_offset = next_nonstatic_padded_offset;
4096 next_nonstatic_padded_offset += heapOopSize;
4097
4098 // Record this oop in the oop maps
4099 if( nonstatic_oop_map_count > 0 &&
4100 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4101 real_offset -
4102 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4103 heapOopSize ) {
4104 // This oop is adjacent to the previous one, add to current oop map
4105 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4106 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4107 } else {
4108 // This oop is not adjacent to the previous one, create new oop map
4109 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4110 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4111 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4112 nonstatic_oop_map_count += 1;
4113 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4114 first_nonstatic_oop_offset = real_offset;
4115 }
4116 }
4117 break;
4118
4119 default:
4120 ShouldNotReachHere();
4121 }
4122
4123 if (fs.contended_group() == 0) {
4124 // Contended group defines the equivalence class over the fields:
4125 // the fields within the same contended group are not inter-padded.
4126 // The only exception is default group, which does not incur the
4127 // equivalence, and so requires intra-padding.
4128 next_nonstatic_padded_offset += ContendedPaddingWidth;
4129 }
4130
4131 fs.set_offset(real_offset);
4132 } // for
4133
4134 // Start laying out the next group.
4135 // Note that this will effectively pad the last group in the back;
4136 // this is expected to alleviate memory contention effects for
4137 // subclass fields and/or adjacent object.
4138 // If this was the default group, the padding is already in place.
4139 if (current_group != 0) {
4140 next_nonstatic_padded_offset += ContendedPaddingWidth;
4141 }
4142 }
4143
4144 // handle static fields
4145 }
4146
4147 // Entire class is contended, pad in the back.
4148 // This helps to alleviate memory contention effects for subclass fields
4149 // and/or adjacent object.
4150 if (is_contended_class) {
4151 next_nonstatic_padded_offset += ContendedPaddingWidth;
4152 }
4153
4154 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4155
4156 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
4157 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4158 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
4159
4160 int static_field_size = (static_fields_end -
4161 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4162 nonstatic_field_size = nonstatic_field_size +
4163 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4164
4165 int instance_size = align_object_size(instance_end / wordSize);
4166
4167 assert(instance_size == align_object_size(align_size_up(
4168 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4169 wordSize) / wordSize), "consistent layout helper value");
4170
4171 // Invariant: nonstatic_field end/start should only change if there are
4172 // nonstatic fields in the class, or if the class is contended. We compare
4173 // against the non-aligned value, so that end alignment will not fail the
4174 // assert without actually having the fields.
4175 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4176 is_contended_class ||
4177 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4178
4179 // Number of non-static oop map blocks allocated at end of klass.
4180 const unsigned int total_oop_map_count =
4181 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4182 first_nonstatic_oop_offset);
4183
4184 #ifndef PRODUCT
4185 if (PrintFieldLayout) {
4186 print_field_layout(_class_name,
4187 _fields,
4188 cp,
4189 instance_size,
4190 nonstatic_fields_start,
4191 nonstatic_fields_end,
4192 static_fields_end);
4193 }
4194
4195 #endif
4196 // Pass back information needed for InstanceKlass creation
4197 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4198 info->nonstatic_oop_counts = nonstatic_oop_counts;
4199 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4200 info->total_oop_map_count = total_oop_map_count;
4201 info->instance_size = instance_size;
4202 info->static_field_size = static_field_size;
4203 info->nonstatic_field_size = nonstatic_field_size;
4204 info->has_nonstatic_fields = has_nonstatic_fields;
4205 }
4206
4207 static void fill_oop_maps(const InstanceKlass* k,
4208 unsigned int nonstatic_oop_map_count,
4209 const int* nonstatic_oop_offsets,
4210 const unsigned int* nonstatic_oop_counts) {
4211
4212 assert(k != NULL, "invariant");
4213
4214 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4215 const InstanceKlass* const super = k->superklass();
4216 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4217 if (super_count > 0) {
4218 // Copy maps from superklass
4219 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4220 for (unsigned int i = 0; i < super_count; ++i) {
4221 *this_oop_map++ = *super_oop_map++;
4222 }
4223 }
4224
4225 if (nonstatic_oop_map_count > 0) {
4226 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4227 // The counts differ because there is no gap between superklass's last oop
4228 // field and the first local oop field. Extend the last oop map copied
4229 // from the superklass instead of creating new one.
4230 nonstatic_oop_map_count--;
4231 nonstatic_oop_offsets++;
4232 this_oop_map--;
4233 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4234 this_oop_map++;
4235 }
4236
4237 // Add new map blocks, fill them
4238 while (nonstatic_oop_map_count-- > 0) {
4239 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4240 this_oop_map->set_count(*nonstatic_oop_counts++);
4241 this_oop_map++;
4242 }
4243 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4244 this_oop_map, "sanity");
4245 }
4246 }
4247
4248
4249 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4250 assert(ik != NULL, "invariant");
4251
4252 const Klass* const super = ik->super();
4253
4254 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4255 // in which case we don't have to register objects as finalizable
4256 if (!_has_empty_finalizer) {
4257 if (_has_finalizer ||
4258 (super != NULL && super->has_finalizer())) {
4259 ik->set_has_finalizer();
4260 }
4261 }
4262
4263 #ifdef ASSERT
4264 bool f = false;
4265 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4266 vmSymbols::void_method_signature());
4267 if (m != NULL && !m->is_empty_method()) {
4268 f = true;
4269 }
4270
4271 // Spec doesn't prevent agent from redefinition of empty finalizer.
4272 // Despite the fact that it's generally bad idea and redefined finalizer
4273 // will not work as expected we shouldn't abort vm in this case
4274 if (!ik->has_redefined_this_or_super()) {
4275 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4276 }
4277 #endif
4278
4279 // Check if this klass supports the java.lang.Cloneable interface
4280 if (SystemDictionary::Cloneable_klass_loaded()) {
4281 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4282 ik->set_is_cloneable();
4283 }
4284 }
4285
4286 // Check if this klass has a vanilla default constructor
4287 if (super == NULL) {
4288 // java.lang.Object has empty default constructor
4289 ik->set_has_vanilla_constructor();
4290 } else {
4291 if (super->has_vanilla_constructor() &&
4292 _has_vanilla_constructor) {
4293 ik->set_has_vanilla_constructor();
4294 }
4295 #ifdef ASSERT
4296 bool v = false;
4297 if (super->has_vanilla_constructor()) {
4298 const Method* const constructor =
4299 ik->find_method(vmSymbols::object_initializer_name(),
4300 vmSymbols::void_method_signature());
4301 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4302 v = true;
4303 }
4304 }
4305 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4306 #endif
4307 }
4308
4309 // If it cannot be fast-path allocated, set a bit in the layout helper.
4310 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4311 assert(ik->size_helper() > 0, "layout_helper is initialized");
4312 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4313 || ik->is_abstract() || ik->is_interface()
4314 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4315 || ik->size_helper() >= FastAllocateSizeLimit) {
4316 // Forbid fast-path allocation.
4317 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4318 ik->set_layout_helper(lh);
4319 }
4320 }
4321
4322 // Attach super classes and interface classes to class loader data
4323 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4324 TRAPS) {
4325 assert(defined_klass != NULL, "invariant");
4326
4327 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4328 if (defining_loader_data->is_the_null_class_loader_data()) {
4329 // Dependencies to null class loader data are implicit.
4330 return;
4331 } else {
4332 // add super class dependency
4333 Klass* const super = defined_klass->super();
4334 if (super != NULL) {
4335 defining_loader_data->record_dependency(super, CHECK);
4336 }
4337
4338 // add super interface dependencies
4339 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4340 if (local_interfaces != NULL) {
4341 const int length = local_interfaces->length();
4342 for (int i = 0; i < length; i++) {
4343 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4344 }
4345 }
4346 }
4347 }
4348
4349 // utility methods for appending an array with check for duplicates
4350
4351 static void append_interfaces(GrowableArray<Klass*>* result,
4352 const Array<Klass*>* const ifs) {
4353 // iterate over new interfaces
4354 for (int i = 0; i < ifs->length(); i++) {
4355 Klass* const e = ifs->at(i);
4356 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4357 // add new interface
4358 result->append_if_missing(e);
4359 }
4360 }
4361
4362 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4363 Array<Klass*>* local_ifs,
4364 ClassLoaderData* loader_data,
4365 TRAPS) {
4366 assert(local_ifs != NULL, "invariant");
4367 assert(loader_data != NULL, "invariant");
4368
4369 // Compute maximum size for transitive interfaces
4370 int max_transitive_size = 0;
4371 int super_size = 0;
4372 // Add superclass transitive interfaces size
4373 if (super != NULL) {
4374 super_size = super->transitive_interfaces()->length();
4375 max_transitive_size += super_size;
4376 }
4377 // Add local interfaces' super interfaces
4378 const int local_size = local_ifs->length();
4379 for (int i = 0; i < local_size; i++) {
4380 Klass* const l = local_ifs->at(i);
4381 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4382 }
4383 // Finally add local interfaces
4384 max_transitive_size += local_size;
4385 // Construct array
4386 if (max_transitive_size == 0) {
4387 // no interfaces, use canonicalized array
4388 return Universe::the_empty_klass_array();
4389 } else if (max_transitive_size == super_size) {
4390 // no new local interfaces added, share superklass' transitive interface array
4391 return super->transitive_interfaces();
4392 } else if (max_transitive_size == local_size) {
4393 // only local interfaces added, share local interface array
4394 return local_ifs;
4395 } else {
4396 ResourceMark rm;
4397 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4398
4399 // Copy down from superclass
4400 if (super != NULL) {
4401 append_interfaces(result, super->transitive_interfaces());
4402 }
4403
4404 // Copy down from local interfaces' superinterfaces
4405 for (int i = 0; i < local_size; i++) {
4406 Klass* const l = local_ifs->at(i);
4407 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4408 }
4409 // Finally add local interfaces
4410 append_interfaces(result, local_ifs);
4411
4412 // length will be less than the max_transitive_size if duplicates were removed
4413 const int length = result->length();
4414 assert(length <= max_transitive_size, "just checking");
4415 Array<Klass*>* const new_result =
4416 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4417 for (int i = 0; i < length; i++) {
4418 Klass* const e = result->at(i);
4419 assert(e != NULL, "just checking");
4420 new_result->at_put(i, e);
4421 }
4422 return new_result;
4423 }
4424 }
4425
4426 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4427 assert(this_klass != NULL, "invariant");
4428 const Klass* const super = this_klass->super();
4429 if (super != NULL) {
4430
4431 // If the loader is not the boot loader then throw an exception if its
4432 // superclass is in package jdk.internal.reflect and its loader is not a
4433 // special reflection class loader
4434 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4435 assert(super->is_instance_klass(), "super is not instance klass");
4436 PackageEntry* super_package = super->package();
4437 if (super_package != NULL &&
4438 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4439 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4440 ResourceMark rm(THREAD);
4441 Exceptions::fthrow(
4442 THREAD_AND_LOCATION,
4443 vmSymbols::java_lang_IllegalAccessError(),
4444 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4445 this_klass->external_name(),
4446 this_klass->class_loader_data()->loader_name(),
4447 super->external_name());
4448 return;
4449 }
4450 }
4451
4452 Reflection::VerifyClassAccessResults vca_result =
4453 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4454 if (vca_result != Reflection::ACCESS_OK) {
4455 ResourceMark rm(THREAD);
4456 char* msg = Reflection::verify_class_access_msg(this_klass,
4457 InstanceKlass::cast(super),
4458 vca_result);
4459 if (msg == NULL) {
4460 Exceptions::fthrow(
4461 THREAD_AND_LOCATION,
4462 vmSymbols::java_lang_IllegalAccessError(),
4463 "class %s cannot access its superclass %s",
4464 this_klass->external_name(),
4465 super->external_name());
4466 } else {
4467 // Add additional message content.
4468 Exceptions::fthrow(
4469 THREAD_AND_LOCATION,
4470 vmSymbols::java_lang_IllegalAccessError(),
4471 "superclass access check failed: %s",
4472 msg);
4473 }
4474 }
4475 }
4476 }
4477
4478
4479 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4480 assert(this_klass != NULL, "invariant");
4481 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4482 const int lng = local_interfaces->length();
4483 for (int i = lng - 1; i >= 0; i--) {
4484 Klass* const k = local_interfaces->at(i);
4485 assert (k != NULL && k->is_interface(), "invalid interface");
4486 Reflection::VerifyClassAccessResults vca_result =
4487 Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false);
4488 if (vca_result != Reflection::ACCESS_OK) {
4489 ResourceMark rm(THREAD);
4490 char* msg = Reflection::verify_class_access_msg(this_klass,
4491 InstanceKlass::cast(k),
4492 vca_result);
4493 if (msg == NULL) {
4494 Exceptions::fthrow(
4495 THREAD_AND_LOCATION,
4496 vmSymbols::java_lang_IllegalAccessError(),
4497 "class %s cannot access its superinterface %s",
4498 this_klass->external_name(),
4499 k->external_name());
4500 } else {
4501 // Add additional message content.
4502 Exceptions::fthrow(
4503 THREAD_AND_LOCATION,
4504 vmSymbols::java_lang_IllegalAccessError(),
4505 "superinterface check failed: %s",
4506 msg);
4507 }
4508 }
4509 }
4510 }
4511
4512
4513 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4514 assert(this_klass != NULL, "invariant");
4515 const Array<Method*>* const methods = this_klass->methods();
4516 const int num_methods = methods->length();
4517
4518 // go thru each method and check if it overrides a final method
4519 for (int index = 0; index < num_methods; index++) {
4520 const Method* const m = methods->at(index);
4521
4522 // skip private, static, and <init> methods
4523 if ((!m->is_private() && !m->is_static()) &&
4524 (m->name() != vmSymbols::object_initializer_name())) {
4525
4526 const Symbol* const name = m->name();
4527 const Symbol* const signature = m->signature();
4528 const Klass* k = this_klass->super();
4529 const Method* super_m = NULL;
4530 while (k != NULL) {
4531 // skip supers that don't have final methods.
4532 if (k->has_final_method()) {
4533 // lookup a matching method in the super class hierarchy
4534 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4535 if (super_m == NULL) {
4536 break; // didn't find any match; get out
4537 }
4538
4539 if (super_m->is_final() && !super_m->is_static() &&
4540 // matching method in super is final, and not static
4541 (Reflection::verify_field_access(this_klass,
4542 super_m->method_holder(),
4543 super_m->method_holder(),
4544 super_m->access_flags(), false))
4545 // this class can access super final method and therefore override
4546 ) {
4547 ResourceMark rm(THREAD);
4548 Exceptions::fthrow(
4549 THREAD_AND_LOCATION,
4550 vmSymbols::java_lang_VerifyError(),
4551 "class %s overrides final method %s.%s%s",
4552 this_klass->external_name(),
4553 super_m->method_holder()->external_name(),
4554 name->as_C_string(),
4555 signature->as_C_string()
4556 );
4557 return;
4558 }
4559
4560 // continue to look from super_m's holder's super.
4561 k = super_m->method_holder()->super();
4562 continue;
4563 }
4564
4565 k = k->super();
4566 }
4567 }
4568 }
4569 }
4570
4571
4572 // assumes that this_klass is an interface
4573 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4574 assert(this_klass != NULL, "invariant");
4575 assert(this_klass->is_interface(), "not an interface");
4576 const Array<Method*>* methods = this_klass->methods();
4577 const int num_methods = methods->length();
4578
4579 for (int index = 0; index < num_methods; index++) {
4580 const Method* const m = methods->at(index);
4581 // if m is static and not the init method, throw a verify error
4582 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4583 ResourceMark rm(THREAD);
4584 Exceptions::fthrow(
4585 THREAD_AND_LOCATION,
4586 vmSymbols::java_lang_VerifyError(),
4587 "Illegal static method %s in interface %s",
4588 m->name()->as_C_string(),
4589 this_klass->external_name()
4590 );
4591 return;
4592 }
4593 }
4594 }
4595
4596 // utility methods for format checking
4597
4598 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4599 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4600 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4601 if (is_module) {
4602 ResourceMark rm(THREAD);
4603 Exceptions::fthrow(
4604 THREAD_AND_LOCATION,
4605 vmSymbols::java_lang_NoClassDefFoundError(),
4606 "%s is not a class because access_flag ACC_MODULE is set",
4607 _class_name->as_C_string());
4608 return;
4609 }
4610
4611 if (!_need_verify) { return; }
4612
4613 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4614 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4615 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4616 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4617 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4618 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4619 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4620
4621 if ((is_abstract && is_final) ||
4622 (is_interface && !is_abstract) ||
4623 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4624 (!is_interface && major_gte_15 && is_annotation)) {
4625 ResourceMark rm(THREAD);
4626 Exceptions::fthrow(
4627 THREAD_AND_LOCATION,
4628 vmSymbols::java_lang_ClassFormatError(),
4629 "Illegal class modifiers in class %s: 0x%X",
4630 _class_name->as_C_string(), flags
4631 );
4632 return;
4633 }
4634 }
4635
4636 static bool has_illegal_visibility(jint flags) {
4637 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4638 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4639 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4640
4641 return ((is_public && is_protected) ||
4642 (is_public && is_private) ||
4643 (is_protected && is_private));
4644 }
4645
4646 static bool is_supported_version(u2 major, u2 minor){
4647 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4648 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4649 (major <= max_version) &&
4650 ((major != max_version) ||
4651 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4652 }
4653
4654 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4655 bool is_interface,
4656 TRAPS) const {
4657 if (!_need_verify) { return; }
4658
4659 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4660 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4661 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4662 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4663 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4664 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4665 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4666 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4667 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4668
4669 bool is_illegal = false;
4670
4671 if (is_interface) {
4672 if (!is_public || !is_static || !is_final || is_private ||
4673 is_protected || is_volatile || is_transient ||
4674 (major_gte_15 && is_enum)) {
4675 is_illegal = true;
4676 }
4677 } else { // not interface
4678 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4679 is_illegal = true;
4680 }
4681 }
4682
4683 if (is_illegal) {
4684 ResourceMark rm(THREAD);
4685 Exceptions::fthrow(
4686 THREAD_AND_LOCATION,
4687 vmSymbols::java_lang_ClassFormatError(),
4688 "Illegal field modifiers in class %s: 0x%X",
4689 _class_name->as_C_string(), flags);
4690 return;
4691 }
4692 }
4693
4694 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4695 bool is_interface,
4696 const Symbol* name,
4697 TRAPS) const {
4698 if (!_need_verify) { return; }
4699
4700 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4701 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4702 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4703 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4704 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4705 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4706 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4707 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4708 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4709 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4710 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4711 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4712 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4713
4714 bool is_illegal = false;
4715
4716 if (is_interface) {
4717 if (major_gte_8) {
4718 // Class file version is JAVA_8_VERSION or later Methods of
4719 // interfaces may set any of the flags except ACC_PROTECTED,
4720 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4721 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4722 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4723 (is_native || is_protected || is_final || is_synchronized) ||
4724 // If a specific method of a class or interface has its
4725 // ACC_ABSTRACT flag set, it must not have any of its
4726 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4727 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4728 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4729 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4730 (is_abstract && (is_private || is_static || is_strict))) {
4731 is_illegal = true;
4732 }
4733 } else if (major_gte_15) {
4734 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4735 if (!is_public || is_private || is_protected || is_static || is_final ||
4736 is_synchronized || is_native || !is_abstract || is_strict) {
4737 is_illegal = true;
4738 }
4739 } else {
4740 // Class file version is pre-JAVA_1_5_VERSION
4741 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4742 is_illegal = true;
4743 }
4744 }
4745 } else { // not interface
4746 if (has_illegal_visibility(flags)) {
4747 is_illegal = true;
4748 } else {
4749 if (is_initializer) {
4750 if (is_static || is_final || is_synchronized || is_native ||
4751 is_abstract || (major_gte_15 && is_bridge)) {
4752 is_illegal = true;
4753 }
4754 } else { // not initializer
4755 if (is_abstract) {
4756 if ((is_final || is_native || is_private || is_static ||
4757 (major_gte_15 && (is_synchronized || is_strict)))) {
4758 is_illegal = true;
4759 }
4760 }
4761 }
4762 }
4763 }
4764
4765 if (is_illegal) {
4766 ResourceMark rm(THREAD);
4767 Exceptions::fthrow(
4768 THREAD_AND_LOCATION,
4769 vmSymbols::java_lang_ClassFormatError(),
4770 "Method %s in class %s has illegal modifiers: 0x%X",
4771 name->as_C_string(), _class_name->as_C_string(), flags);
4772 return;
4773 }
4774 }
4775
4776 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4777 int length,
4778 TRAPS) const {
4779 assert(_need_verify, "only called when _need_verify is true");
4780 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4781 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4782 }
4783 }
4784
4785 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4786 // In class names, '/' separates unqualified names. This is verified in this function also.
4787 // Method names also may not contain the characters '<' or '>', unless <init>
4788 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4789 // method. Because these names have been checked as special cases before
4790 // calling this method in verify_legal_method_name.
4791 //
4792 // This method is also called from the modular system APIs in modules.cpp
4793 // to verify the validity of module and package names.
4794 bool ClassFileParser::verify_unqualified_name(const char* name,
4795 unsigned int length,
4796 int type) {
4797 for (const char* p = name; p != name + length;) {
4798 jchar ch = *p;
4799 if (ch < 128) {
4800 if (ch == '.' || ch == ';' || ch == '[' ) {
4801 return false; // do not permit '.', ';', or '['
4802 }
4803 if (ch == '/') {
4804 // check for '//' or leading or trailing '/' which are not legal
4805 // unqualified name must not be empty
4806 if (type == ClassFileParser::LegalClass) {
4807 if (p == name || p+1 >= name+length || *(p+1) == '/') {
4808 return false;
4809 }
4810 } else {
4811 return false; // do not permit '/' unless it's class name
4812 }
4813 }
4814 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
4815 return false; // do not permit '<' or '>' in method names
4816 }
4817 p++;
4818 } else {
4819 char* tmp_p = UTF8::next(p, &ch);
4820 p = tmp_p;
4821 }
4822 }
4823 return true;
4824 }
4825
4826 // Take pointer to a string. Skip over the longest part of the string that could
4827 // be taken as a fieldname. Allow '/' if slash_ok is true.
4828 // Return a pointer to just past the fieldname.
4829 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4830 // being true, we saw consecutive slashes (meaning we were looking for a
4831 // qualified path but found something that was badly-formed).
4832 static const char* skip_over_field_name(const char* name,
4833 bool slash_ok,
4834 unsigned int length) {
4835 const char* p;
4836 jboolean last_is_slash = false;
4837 jboolean not_first_ch = false;
4838
4839 for (p = name; p != name + length; not_first_ch = true) {
4840 const char* old_p = p;
4841 jchar ch = *p;
4842 if (ch < 128) {
4843 p++;
4844 // quick check for ascii
4845 if ((ch >= 'a' && ch <= 'z') ||
4846 (ch >= 'A' && ch <= 'Z') ||
4847 (ch == '_' || ch == '$') ||
4848 (not_first_ch && ch >= '0' && ch <= '9')) {
4849 last_is_slash = false;
4850 continue;
4851 }
4852 if (slash_ok && ch == '/') {
4853 if (last_is_slash) {
4854 return NULL; // Don't permit consecutive slashes
4855 }
4856 last_is_slash = true;
4857 continue;
4858 }
4859 }
4860 else {
4861 jint unicode_ch;
4862 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4863 p = tmp_p;
4864 last_is_slash = false;
4865 // Check if ch is Java identifier start or is Java identifier part
4866 // 4672820: call java.lang.Character methods directly without generating separate tables.
4867 EXCEPTION_MARK;
4868
4869 // return value
4870 JavaValue result(T_BOOLEAN);
4871 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4872 JavaCallArguments args;
4873 args.push_int(unicode_ch);
4874
4875 // public static boolean isJavaIdentifierStart(char ch);
4876 JavaCalls::call_static(&result,
4877 SystemDictionary::Character_klass(),
4878 vmSymbols::isJavaIdentifierStart_name(),
4879 vmSymbols::int_bool_signature(),
4880 &args,
4881 THREAD);
4882
4883 if (HAS_PENDING_EXCEPTION) {
4884 CLEAR_PENDING_EXCEPTION;
4885 return 0;
4886 }
4887 if (result.get_jboolean()) {
4888 continue;
4889 }
4890
4891 if (not_first_ch) {
4892 // public static boolean isJavaIdentifierPart(char ch);
4893 JavaCalls::call_static(&result,
4894 SystemDictionary::Character_klass(),
4895 vmSymbols::isJavaIdentifierPart_name(),
4896 vmSymbols::int_bool_signature(),
4897 &args,
4898 THREAD);
4899
4900 if (HAS_PENDING_EXCEPTION) {
4901 CLEAR_PENDING_EXCEPTION;
4902 return 0;
4903 }
4904
4905 if (result.get_jboolean()) {
4906 continue;
4907 }
4908 }
4909 }
4910 return (not_first_ch) ? old_p : NULL;
4911 }
4912 return (not_first_ch) ? p : NULL;
4913 }
4914
4915 // Take pointer to a string. Skip over the longest part of the string that could
4916 // be taken as a field signature. Allow "void" if void_ok.
4917 // Return a pointer to just past the signature.
4918 // Return NULL if no legal signature is found.
4919 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4920 bool void_ok,
4921 unsigned int length,
4922 TRAPS) const {
4923 unsigned int array_dim = 0;
4924 while (length > 0) {
4925 switch (signature[0]) {
4926 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4927 case JVM_SIGNATURE_BOOLEAN:
4928 case JVM_SIGNATURE_BYTE:
4929 case JVM_SIGNATURE_CHAR:
4930 case JVM_SIGNATURE_SHORT:
4931 case JVM_SIGNATURE_INT:
4932 case JVM_SIGNATURE_FLOAT:
4933 case JVM_SIGNATURE_LONG:
4934 case JVM_SIGNATURE_DOUBLE:
4935 return signature + 1;
4936 case JVM_SIGNATURE_CLASS: {
4937 if (_major_version < JAVA_1_5_VERSION) {
4938 // Skip over the class name if one is there
4939 const char* const p = skip_over_field_name(signature + 1, true, --length);
4940
4941 // The next character better be a semicolon
4942 if (p && (p - signature) > 1 && p[0] == ';') {
4943 return p + 1;
4944 }
4945 }
4946 else {
4947 // Skip leading 'L' and ignore first appearance of ';'
4948 length--;
4949 signature++;
4950 char* c = strchr((char*) signature, ';');
4951 // Format check signature
4952 if (c != NULL) {
4953 ResourceMark rm(THREAD);
4954 int newlen = c - (char*) signature;
4955 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
4956 strncpy(sig, signature, newlen);
4957 sig[newlen] = '\0';
4958
4959 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
4960 if (!legal) {
4961 classfile_parse_error("Class name contains illegal character "
4962 "in descriptor in class file %s",
4963 CHECK_0);
4964 return NULL;
4965 }
4966 return signature + newlen + 1;
4967 }
4968 }
4969 return NULL;
4970 }
4971 case JVM_SIGNATURE_ARRAY:
4972 array_dim++;
4973 if (array_dim > 255) {
4974 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4975 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4976 }
4977 // The rest of what's there better be a legal signature
4978 signature++;
4979 length--;
4980 void_ok = false;
4981 break;
4982 default:
4983 return NULL;
4984 }
4985 }
4986 return NULL;
4987 }
4988
4989 // Checks if name is a legal class name.
4990 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4991 if (!_need_verify || _relax_verify) { return; }
4992
4993 char buf[fixed_buffer_size];
4994 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4995 unsigned int length = name->utf8_length();
4996 bool legal = false;
4997
4998 if (length > 0) {
4999 const char* p;
5000 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5001 p = skip_over_field_signature(bytes, false, length, CHECK);
5002 legal = (p != NULL) && ((p - bytes) == (int)length);
5003 } else if (_major_version < JAVA_1_5_VERSION) {
5004 if (bytes[0] != '<') {
5005 p = skip_over_field_name(bytes, true, length);
5006 legal = (p != NULL) && ((p - bytes) == (int)length);
5007 }
5008 } else {
5009 // 4900761: relax the constraints based on JSR202 spec
5010 // Class names may be drawn from the entire Unicode character set.
5011 // Identifiers between '/' must be unqualified names.
5012 // The utf8 string has been verified when parsing cpool entries.
5013 legal = verify_unqualified_name(bytes, length, LegalClass);
5014 }
5015 }
5016 if (!legal) {
5017 ResourceMark rm(THREAD);
5018 assert(_class_name != NULL, "invariant");
5019 Exceptions::fthrow(
5020 THREAD_AND_LOCATION,
5021 vmSymbols::java_lang_ClassFormatError(),
5022 "Illegal class name \"%s\" in class file %s", bytes,
5023 _class_name->as_C_string()
5024 );
5025 return;
5026 }
5027 }
5028
5029 // Checks if name is a legal field name.
5030 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5031 if (!_need_verify || _relax_verify) { return; }
5032
5033 char buf[fixed_buffer_size];
5034 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5035 unsigned int length = name->utf8_length();
5036 bool legal = false;
5037
5038 if (length > 0) {
5039 if (_major_version < JAVA_1_5_VERSION) {
5040 if (bytes[0] != '<') {
5041 const char* p = skip_over_field_name(bytes, false, length);
5042 legal = (p != NULL) && ((p - bytes) == (int)length);
5043 }
5044 } else {
5045 // 4881221: relax the constraints based on JSR202 spec
5046 legal = verify_unqualified_name(bytes, length, LegalField);
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 field name \"%s\" in class %s", bytes,
5057 _class_name->as_C_string()
5058 );
5059 return;
5060 }
5061 }
5062
5063 // Checks if name is a legal method name.
5064 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5065 if (!_need_verify || _relax_verify) { return; }
5066
5067 assert(name != NULL, "method name is null");
5068 char buf[fixed_buffer_size];
5069 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5070 unsigned int length = name->utf8_length();
5071 bool legal = false;
5072
5073 if (length > 0) {
5074 if (bytes[0] == '<') {
5075 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5076 legal = true;
5077 }
5078 } else if (_major_version < JAVA_1_5_VERSION) {
5079 const char* p;
5080 p = skip_over_field_name(bytes, false, length);
5081 legal = (p != NULL) && ((p - bytes) == (int)length);
5082 } else {
5083 // 4881221: relax the constraints based on JSR202 spec
5084 legal = verify_unqualified_name(bytes, length, LegalMethod);
5085 }
5086 }
5087
5088 if (!legal) {
5089 ResourceMark rm(THREAD);
5090 assert(_class_name != NULL, "invariant");
5091 Exceptions::fthrow(
5092 THREAD_AND_LOCATION,
5093 vmSymbols::java_lang_ClassFormatError(),
5094 "Illegal method name \"%s\" in class %s", bytes,
5095 _class_name->as_C_string()
5096 );
5097 return;
5098 }
5099 }
5100
5101
5102 // Checks if signature is a legal field signature.
5103 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5104 const Symbol* signature,
5105 TRAPS) const {
5106 if (!_need_verify) { return; }
5107
5108 char buf[fixed_buffer_size];
5109 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5110 const unsigned int length = signature->utf8_length();
5111 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5112
5113 if (p == NULL || (p - bytes) != (int)length) {
5114 throwIllegalSignature("Field", name, signature, CHECK);
5115 }
5116 }
5117
5118 // Checks if signature is a legal method signature.
5119 // Returns number of parameters
5120 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5121 const Symbol* signature,
5122 TRAPS) const {
5123 if (!_need_verify) {
5124 // make sure caller's args_size will be less than 0 even for non-static
5125 // method so it will be recomputed in compute_size_of_parameters().
5126 return -2;
5127 }
5128
5129 // Class initializers cannot have args for class format version >= 51.
5130 if (name == vmSymbols::class_initializer_name() &&
5131 signature != vmSymbols::void_method_signature() &&
5132 _major_version >= JAVA_7_VERSION) {
5133 throwIllegalSignature("Method", name, signature, CHECK_0);
5134 return 0;
5135 }
5136
5137 unsigned int args_size = 0;
5138 char buf[fixed_buffer_size];
5139 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5140 unsigned int length = signature->utf8_length();
5141 const char* nextp;
5142
5143 // The first character must be a '('
5144 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5145 length--;
5146 // Skip over legal field signatures
5147 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5148 while ((length > 0) && (nextp != NULL)) {
5149 args_size++;
5150 if (p[0] == 'J' || p[0] == 'D') {
5151 args_size++;
5152 }
5153 length -= nextp - p;
5154 p = nextp;
5155 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5156 }
5157 // The first non-signature thing better be a ')'
5158 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5159 length--;
5160 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5161 // All internal methods must return void
5162 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5163 return args_size;
5164 }
5165 } else {
5166 // Now we better just have a return value
5167 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5168 if (nextp && ((int)length == (nextp - p))) {
5169 return args_size;
5170 }
5171 }
5172 }
5173 }
5174 // Report error
5175 throwIllegalSignature("Method", name, signature, CHECK_0);
5176 return 0;
5177 }
5178
5179 int ClassFileParser::static_field_size() const {
5180 assert(_field_info != NULL, "invariant");
5181 return _field_info->static_field_size;
5182 }
5183
5184 int ClassFileParser::total_oop_map_count() const {
5185 assert(_field_info != NULL, "invariant");
5186 return _field_info->total_oop_map_count;
5187 }
5188
5189 jint ClassFileParser::layout_size() const {
5190 assert(_field_info != NULL, "invariant");
5191 return _field_info->instance_size;
5192 }
5193
5194 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5195 const Array<Method*>* methods) {
5196 assert(ik != NULL, "invariant");
5197 assert(methods != NULL, "invariant");
5198
5199 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5200 // (We used to do this lazily, but now we query it in Rewriter,
5201 // which is eagerly done for every method, so we might as well do it now,
5202 // when everything is fresh in memory.)
5203 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5204
5205 if (klass_id != vmSymbols::NO_SID) {
5206 for (int j = 0; j < methods->length(); ++j) {
5207 Method* method = methods->at(j);
5208 method->init_intrinsic_id();
5209
5210 if (CheckIntrinsics) {
5211 // Check if an intrinsic is defined for method 'method',
5212 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5213 if (method->intrinsic_id() != vmIntrinsics::_none &&
5214 !method->intrinsic_candidate()) {
5215 tty->print("Compiler intrinsic is defined for method [%s], "
5216 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5217 method->name_and_sig_as_C_string(),
5218 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5219 );
5220 tty->cr();
5221 DEBUG_ONLY(vm_exit(1));
5222 }
5223 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5224 // but there is no intrinsic available for it.
5225 if (method->intrinsic_candidate() &&
5226 method->intrinsic_id() == vmIntrinsics::_none) {
5227 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5228 "but no compiler intrinsic is defined for the method.%s",
5229 method->name_and_sig_as_C_string(),
5230 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5231 );
5232 tty->cr();
5233 DEBUG_ONLY(vm_exit(1));
5234 }
5235 }
5236 } // end for
5237
5238 #ifdef ASSERT
5239 if (CheckIntrinsics) {
5240 // Check for orphan methods in the current class. A method m
5241 // of a class C is orphan if an intrinsic is defined for method m,
5242 // but class C does not declare m.
5243 // The check is potentially expensive, therefore it is available
5244 // only in debug builds.
5245
5246 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5247 if (vmIntrinsics::_compiledLambdaForm == id) {
5248 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5249 // generated for the JVM from a LambdaForm and therefore no method
5250 // is defined for it.
5251 continue;
5252 }
5253
5254 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5255 // Check if the current class contains a method with the same
5256 // name, flags, signature.
5257 bool match = false;
5258 for (int j = 0; j < methods->length(); ++j) {
5259 const Method* method = methods->at(j);
5260 if (method->intrinsic_id() == id) {
5261 match = true;
5262 break;
5263 }
5264 }
5265
5266 if (!match) {
5267 char buf[1000];
5268 tty->print("Compiler intrinsic is defined for method [%s], "
5269 "but the method is not available in class [%s].%s",
5270 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5271 buf, sizeof(buf)),
5272 ik->name()->as_C_string(),
5273 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5274 );
5275 tty->cr();
5276 DEBUG_ONLY(vm_exit(1));
5277 }
5278 }
5279 } // end for
5280 } // CheckIntrinsics
5281 #endif // ASSERT
5282 }
5283 }
5284
5285 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5286 if (_klass != NULL) {
5287 return _klass;
5288 }
5289
5290 InstanceKlass* const ik =
5291 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5292
5293 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5294
5295 assert(_klass == ik, "invariant");
5296
5297 ik->set_has_passed_fingerprint_check(false);
5298 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5299 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5300 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5301 // This class matches with a class saved in an AOT library
5302 ik->set_has_passed_fingerprint_check(true);
5303 } else {
5304 ResourceMark rm;
5305 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5306 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5307 }
5308 }
5309
5310 return ik;
5311 }
5312
5313 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5314 assert(ik != NULL, "invariant");
5315
5316 set_klass_to_deallocate(ik);
5317
5318 assert(_field_info != NULL, "invariant");
5319 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5320 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5321 "sanity");
5322
5323 assert(ik->is_instance_klass(), "sanity");
5324 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5325
5326 // Fill in information already parsed
5327 ik->set_should_verify_class(_need_verify);
5328
5329 // Not yet: supers are done below to support the new subtype-checking fields
5330 ik->set_class_loader_data(_loader_data);
5331 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5332 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5333 assert(_fac != NULL, "invariant");
5334 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5335
5336 // this transfers ownership of a lot of arrays from
5337 // the parser onto the InstanceKlass*
5338 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5339
5340 // note that is not safe to use the fields in the parser from this point on
5341 assert(NULL == _cp, "invariant");
5342 assert(NULL == _fields, "invariant");
5343 assert(NULL == _methods, "invariant");
5344 assert(NULL == _inner_classes, "invariant");
5345 assert(NULL == _local_interfaces, "invariant");
5346 assert(NULL == _transitive_interfaces, "invariant");
5347 assert(NULL == _combined_annotations, "invariant");
5348
5349 if (_has_final_method) {
5350 ik->set_has_final_method();
5351 }
5352
5353 ik->copy_method_ordering(_method_ordering, CHECK);
5354 // The InstanceKlass::_methods_jmethod_ids cache
5355 // is managed on the assumption that the initial cache
5356 // size is equal to the number of methods in the class. If
5357 // that changes, then InstanceKlass::idnum_can_increment()
5358 // has to be changed accordingly.
5359 ik->set_initial_method_idnum(ik->methods()->length());
5360
5361 ik->set_name(_class_name);
5362
5363 if (is_anonymous()) {
5364 // _this_class_index is a CONSTANT_Class entry that refers to this
5365 // anonymous class itself. If this class needs to refer to its own methods or
5366 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5367 // _this_class_index. However, because this class is anonymous (it's
5368 // not stored in SystemDictionary), _this_class_index cannot be resolved
5369 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5370 // Therefore, we must eagerly resolve _this_class_index now.
5371 ik->constants()->klass_at_put(_this_class_index, ik);
5372 }
5373
5374 ik->set_minor_version(_minor_version);
5375 ik->set_major_version(_major_version);
5376 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5377 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5378
5379 if (_host_klass != NULL) {
5380 assert (ik->is_anonymous(), "should be the same");
5381 ik->set_host_klass(_host_klass);
5382 }
5383
5384 // Set PackageEntry for this_klass
5385 oop cl = ik->class_loader();
5386 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5387 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5388 ik->set_package(cld, CHECK);
5389
5390 const Array<Method*>* const methods = ik->methods();
5391 assert(methods != NULL, "invariant");
5392 const int methods_len = methods->length();
5393
5394 check_methods_for_intrinsics(ik, methods);
5395
5396 // Fill in field values obtained by parse_classfile_attributes
5397 if (_parsed_annotations->has_any_annotations()) {
5398 _parsed_annotations->apply_to(ik);
5399 }
5400
5401 apply_parsed_class_attributes(ik);
5402
5403 // Miranda methods
5404 if ((_num_miranda_methods > 0) ||
5405 // if this class introduced new miranda methods or
5406 (_super_klass != NULL && _super_klass->has_miranda_methods())
5407 // super class exists and this class inherited miranda methods
5408 ) {
5409 ik->set_has_miranda_methods(); // then set a flag
5410 }
5411
5412 // Fill in information needed to compute superclasses.
5413 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5414
5415 // Initialize itable offset tables
5416 klassItable::setup_itable_offset_table(ik);
5417
5418 // Compute transitive closure of interfaces this class implements
5419 // Do final class setup
5420 fill_oop_maps(ik,
5421 _field_info->nonstatic_oop_map_count,
5422 _field_info->nonstatic_oop_offsets,
5423 _field_info->nonstatic_oop_counts);
5424
5425 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5426 set_precomputed_flags(ik);
5427
5428 // check if this class can access its super class
5429 check_super_class_access(ik, CHECK);
5430
5431 // check if this class can access its superinterfaces
5432 check_super_interface_access(ik, CHECK);
5433
5434 // check if this class overrides any final method
5435 check_final_method_override(ik, CHECK);
5436
5437 // reject static interface methods prior to Java 8
5438 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5439 check_illegal_static_method(ik, CHECK);
5440 }
5441
5442 // Obtain this_klass' module entry
5443 ModuleEntry* module_entry = ik->module();
5444 assert(module_entry != NULL, "module_entry should always be set");
5445
5446 // Obtain java.lang.Module
5447 Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module()));
5448
5449 // Allocate mirror and initialize static fields
5450 // The create_mirror() call will also call compute_modifiers()
5451 java_lang_Class::create_mirror(ik,
5452 Handle(THREAD, _loader_data->class_loader()),
5453 module_handle,
5454 _protection_domain,
5455 CHECK);
5456
5457 assert(_all_mirandas != NULL, "invariant");
5458
5459 // Generate any default methods - default methods are public interface methods
5460 // that have a default implementation. This is new with Java 8.
5461 if (_has_nonstatic_concrete_methods) {
5462 DefaultMethods::generate_default_methods(ik,
5463 _all_mirandas,
5464 CHECK);
5465 }
5466
5467 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5468 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5469 !module_entry->has_default_read_edges()) {
5470 if (!module_entry->set_has_default_read_edges()) {
5471 // We won a potential race
5472 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5473 }
5474 }
5475
5476 // Update the loader_data graph.
5477 record_defined_class_dependencies(ik, CHECK);
5478
5479 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5480
5481 if (!is_internal()) {
5482 if (log_is_enabled(Info, class, load)) {
5483 ResourceMark rm;
5484 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5485 ik->print_class_load_logging(_loader_data, module_name, _stream);
5486 }
5487
5488 if (log_is_enabled(Debug, class, resolve)) {
5489 ResourceMark rm;
5490 // print out the superclass.
5491 const char * from = ik->external_name();
5492 if (ik->java_super() != NULL) {
5493 log_debug(class, resolve)("%s %s (super)",
5494 from,
5495 ik->java_super()->external_name());
5496 }
5497 // print out each of the interface classes referred to by this class.
5498 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5499 if (local_interfaces != NULL) {
5500 const int length = local_interfaces->length();
5501 for (int i = 0; i < length; i++) {
5502 const Klass* const k = local_interfaces->at(i);
5503 const char * to = k->external_name();
5504 log_debug(class, resolve)("%s %s (interface)", from, to);
5505 }
5506 }
5507 }
5508 }
5509
5510 TRACE_INIT_ID(ik);
5511
5512 // If we reach here, all is well.
5513 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5514 // in order for it to not be destroyed in the ClassFileParser destructor.
5515 set_klass_to_deallocate(NULL);
5516
5517 // it's official
5518 set_klass(ik);
5519
5520 debug_only(ik->verify();)
5521 }
5522
5523 // For an anonymous class that is in the unnamed package, move it to its host class's
5524 // package by prepending its host class's package name to its class name and setting
5525 // its _class_name field.
5526 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5527 ResourceMark rm(THREAD);
5528 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5529 "Anonymous class should not be in a package");
5530 const char* host_pkg_name =
5531 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5532
5533 if (host_pkg_name != NULL) {
5534 size_t host_pkg_len = strlen(host_pkg_name);
5535 int class_name_len = _class_name->utf8_length();
5536 char* new_anon_name =
5537 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5538 // Copy host package name and trailing /.
5539 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5540 new_anon_name[host_pkg_len] = '/';
5541 // Append anonymous class name. The anonymous class name can contain odd
5542 // characters. So, do a strncpy instead of using sprintf("%s...").
5543 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5544
5545 // Create a symbol and update the anonymous class name.
5546 _class_name = SymbolTable::new_symbol(new_anon_name,
5547 (int)host_pkg_len + 1 + class_name_len,
5548 CHECK);
5549 }
5550 }
5551
5552 // If the host class and the anonymous class are in the same package then do
5553 // nothing. If the anonymous class is in the unnamed package then move it to its
5554 // host's package. If the classes are in different packages then throw an IAE
5555 // exception.
5556 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5557 assert(_host_klass != NULL, "Expected an anonymous class");
5558
5559 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5560 _class_name->utf8_length(), '/');
5561 if (anon_last_slash == NULL) { // Unnamed package
5562 prepend_host_package_name(_host_klass, CHECK);
5563 } else {
5564 if (!InstanceKlass::is_same_class_package(_host_klass->class_loader(),
5565 _host_klass->name(),
5566 _host_klass->class_loader(),
5567 _class_name)) {
5568 ResourceMark rm(THREAD);
5569 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5570 err_msg("Host class %s and anonymous class %s are in different packages",
5571 _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5572 }
5573 }
5574 }
5575
5576 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5577 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5578 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5579 bool need_verify =
5580 // verifyAll
5581 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5582 // verifyRemote
5583 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5584 return !need_verify;
5585 }
5586
5587 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5588 Symbol* name,
5589 ClassLoaderData* loader_data,
5590 Handle protection_domain,
5591 const InstanceKlass* host_klass,
5592 GrowableArray<Handle>* cp_patches,
5593 Publicity pub_level,
5594 TRAPS) :
5595 _stream(stream),
5596 _requested_name(name),
5597 _loader_data(loader_data),
5598 _host_klass(host_klass),
5599 _cp_patches(cp_patches),
5600 _num_patched_klasses(0),
5601 _max_num_patched_klasses(0),
5602 _orig_cp_size(0),
5603 _first_patched_klass_resolved_index(0),
5604 _super_klass(),
5605 _cp(NULL),
5606 _fields(NULL),
5607 _methods(NULL),
5608 _inner_classes(NULL),
5609 _local_interfaces(NULL),
5610 _transitive_interfaces(NULL),
5611 _combined_annotations(NULL),
5612 _annotations(NULL),
5613 _type_annotations(NULL),
5614 _fields_annotations(NULL),
5615 _fields_type_annotations(NULL),
5616 _klass(NULL),
5617 _klass_to_deallocate(NULL),
5618 _parsed_annotations(NULL),
5619 _fac(NULL),
5620 _field_info(NULL),
5621 _method_ordering(NULL),
5622 _all_mirandas(NULL),
5623 _vtable_size(0),
5624 _itable_size(0),
5625 _num_miranda_methods(0),
5626 _rt(REF_NONE),
5627 _protection_domain(protection_domain),
5628 _access_flags(),
5629 _pub_level(pub_level),
5630 _bad_constant_seen(0),
5631 _synthetic_flag(false),
5632 _sde_length(false),
5633 _sde_buffer(NULL),
5634 _sourcefile_index(0),
5635 _generic_signature_index(0),
5636 _major_version(0),
5637 _minor_version(0),
5638 _this_class_index(0),
5639 _super_class_index(0),
5640 _itfs_len(0),
5641 _java_fields_count(0),
5642 _need_verify(false),
5643 _relax_verify(false),
5644 _has_nonstatic_concrete_methods(false),
5645 _declares_nonstatic_concrete_methods(false),
5646 _has_final_method(false),
5647 _has_finalizer(false),
5648 _has_empty_finalizer(false),
5649 _has_vanilla_constructor(false),
5650 _max_bootstrap_specifier_index(-1) {
5651
5652 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5653
5654 assert(THREAD->is_Java_thread(), "invariant");
5655 assert(_loader_data != NULL, "invariant");
5656 assert(stream != NULL, "invariant");
5657 assert(_stream != NULL, "invariant");
5658 assert(_stream->buffer() == _stream->current(), "invariant");
5659 assert(_class_name != NULL, "invariant");
5660 assert(0 == _access_flags.as_int(), "invariant");
5661
5662 // Figure out whether we can skip format checking (matching classic VM behavior)
5663 if (DumpSharedSpaces) {
5664 // verify == true means it's a 'remote' class (i.e., non-boot class)
5665 // Verification decision is based on BytecodeVerificationRemote flag
5666 // for those classes.
5667 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5668 BytecodeVerificationLocal;
5669 }
5670 else {
5671 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5672 stream->need_verify());
5673 }
5674 if (_cp_patches != NULL) {
5675 int len = _cp_patches->length();
5676 for (int i=0; i<len; i++) {
5677 if (has_cp_patch_at(i)) {
5678 Handle patch = cp_patch_at(i);
5679 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5680 // We need to append the names of the patched classes to the end of the constant pool,
5681 // because a patched class may have a Utf8 name that's not already included in the
5682 // original constant pool. These class names are used when patch_constant_pool()
5683 // calls patch_class().
5684 //
5685 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5686 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5687 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5688 _max_num_patched_klasses++;
5689 }
5690 }
5691 }
5692 }
5693
5694 // synch back verification state to stream
5695 stream->set_verify(_need_verify);
5696
5697 // Check if verification needs to be relaxed for this class file
5698 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5699 _relax_verify = relax_format_check_for(_loader_data);
5700
5701 parse_stream(stream, CHECK);
5702
5703 post_process_parsed_stream(stream, _cp, CHECK);
5704 }
5705
5706 void ClassFileParser::clear_class_metadata() {
5707 // metadata created before the instance klass is created. Must be
5708 // deallocated if classfile parsing returns an error.
5709 _cp = NULL;
5710 _fields = NULL;
5711 _methods = NULL;
5712 _inner_classes = NULL;
5713 _local_interfaces = NULL;
5714 _transitive_interfaces = NULL;
5715 _combined_annotations = NULL;
5716 _annotations = _type_annotations = NULL;
5717 _fields_annotations = _fields_type_annotations = NULL;
5718 }
5719
5720 // Destructor to clean up
5721 ClassFileParser::~ClassFileParser() {
5722 if (_cp != NULL) {
5723 MetadataFactory::free_metadata(_loader_data, _cp);
5724 }
5725 if (_fields != NULL) {
5726 MetadataFactory::free_array<u2>(_loader_data, _fields);
5727 }
5728
5729 if (_methods != NULL) {
5730 // Free methods
5731 InstanceKlass::deallocate_methods(_loader_data, _methods);
5732 }
5733
5734 // beware of the Universe::empty_blah_array!!
5735 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5736 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5737 }
5738
5739 // Free interfaces
5740 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5741 _local_interfaces, _transitive_interfaces);
5742
5743 if (_combined_annotations != NULL) {
5744 // After all annotations arrays have been created, they are installed into the
5745 // Annotations object that will be assigned to the InstanceKlass being created.
5746
5747 // Deallocate the Annotations object and the installed annotations arrays.
5748 _combined_annotations->deallocate_contents(_loader_data);
5749
5750 // If the _combined_annotations pointer is non-NULL,
5751 // then the other annotations fields should have been cleared.
5752 assert(_annotations == NULL, "Should have been cleared");
5753 assert(_type_annotations == NULL, "Should have been cleared");
5754 assert(_fields_annotations == NULL, "Should have been cleared");
5755 assert(_fields_type_annotations == NULL, "Should have been cleared");
5756 } else {
5757 // If the annotations arrays were not installed into the Annotations object,
5758 // then they have to be deallocated explicitly.
5759 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5760 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5761 Annotations::free_contents(_loader_data, _fields_annotations);
5762 Annotations::free_contents(_loader_data, _fields_type_annotations);
5763 }
5764
5765 clear_class_metadata();
5766
5767 // deallocate the klass if already created. Don't directly deallocate, but add
5768 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5769 // at a safepoint.
5770 if (_klass_to_deallocate != NULL) {
5771 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5772 }
5773 }
5774
5775 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5776 TRAPS) {
5777
5778 assert(stream != NULL, "invariant");
5779 assert(_class_name != NULL, "invariant");
5780
5781 // BEGIN STREAM PARSING
5782 stream->guarantee_more(8, CHECK); // magic, major, minor
5783 // Magic value
5784 const u4 magic = stream->get_u4_fast();
5785 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5786 "Incompatible magic value %u in class file %s",
5787 magic, CHECK);
5788
5789 // Version numbers
5790 _minor_version = stream->get_u2_fast();
5791 _major_version = stream->get_u2_fast();
5792
5793 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5794 ResourceMark rm;
5795 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5796 _major_version, _minor_version, _class_name->as_C_string());
5797 Exceptions::fthrow(
5798 THREAD_AND_LOCATION,
5799 vmSymbols::java_lang_UnsupportedClassVersionError(),
5800 "Unsupported major.minor version for dump time %u.%u",
5801 _major_version,
5802 _minor_version);
5803 }
5804
5805 // Check version numbers - we check this even with verifier off
5806 if (!is_supported_version(_major_version, _minor_version)) {
5807 ResourceMark rm(THREAD);
5808 Exceptions::fthrow(
5809 THREAD_AND_LOCATION,
5810 vmSymbols::java_lang_UnsupportedClassVersionError(),
5811 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5812 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
5813 _class_name->as_C_string(),
5814 _major_version,
5815 _minor_version,
5816 JAVA_MAX_SUPPORTED_VERSION,
5817 JAVA_MAX_SUPPORTED_MINOR_VERSION);
5818 return;
5819 }
5820
5821 stream->guarantee_more(3, CHECK); // length, first cp tag
5822 u2 cp_size = stream->get_u2_fast();
5823
5824 guarantee_property(
5825 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5826 cp_size, CHECK);
5827
5828 _orig_cp_size = cp_size;
5829 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
5830 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
5831 }
5832 cp_size += _max_num_patched_klasses;
5833
5834 _cp = ConstantPool::allocate(_loader_data,
5835 cp_size,
5836 CHECK);
5837
5838 ConstantPool* const cp = _cp;
5839
5840 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
5841
5842 assert(cp_size == (const u2)cp->length(), "invariant");
5843
5844 // ACCESS FLAGS
5845 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5846
5847 // Access flags
5848 jint flags;
5849 // JVM_ACC_MODULE is defined in JDK-9 and later.
5850 if (_major_version >= JAVA_9_VERSION) {
5851 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5852 } else {
5853 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5854 }
5855
5856 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5857 // Set abstract bit for old class files for backward compatibility
5858 flags |= JVM_ACC_ABSTRACT;
5859 }
5860
5861 verify_legal_class_modifiers(flags, CHECK);
5862
5863 short bad_constant = class_bad_constant_seen();
5864 if (bad_constant != 0) {
5865 // Do not throw CFE until after the access_flags are checked because if
5866 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5867 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
5868 }
5869
5870 _access_flags.set_flags(flags);
5871
5872 // This class and superclass
5873 _this_class_index = stream->get_u2_fast();
5874 check_property(
5875 valid_cp_range(_this_class_index, cp_size) &&
5876 cp->tag_at(_this_class_index).is_unresolved_klass(),
5877 "Invalid this class index %u in constant pool in class file %s",
5878 _this_class_index, CHECK);
5879
5880 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5881 assert(class_name_in_cp != NULL, "class_name can't be null");
5882
5883 // Update _class_name which could be null previously
5884 // to reflect the name in the constant pool
5885 _class_name = class_name_in_cp;
5886
5887 // Don't need to check whether this class name is legal or not.
5888 // It has been checked when constant pool is parsed.
5889 // However, make sure it is not an array type.
5890 if (_need_verify) {
5891 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
5892 "Bad class name in class file %s",
5893 CHECK);
5894 }
5895
5896 // Checks if name in class file matches requested name
5897 if (_requested_name != NULL && _requested_name != _class_name) {
5898 ResourceMark rm(THREAD);
5899 Exceptions::fthrow(
5900 THREAD_AND_LOCATION,
5901 vmSymbols::java_lang_NoClassDefFoundError(),
5902 "%s (wrong name: %s)",
5903 _class_name->as_C_string(),
5904 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
5905 );
5906 return;
5907 }
5908
5909 // if this is an anonymous class fix up its name if it's in the unnamed
5910 // package. Otherwise, throw IAE if it is in a different package than
5911 // its host class.
5912 if (_host_klass != NULL) {
5913 fix_anonymous_class_name(CHECK);
5914 }
5915
5916 // Verification prevents us from creating names with dots in them, this
5917 // asserts that that's the case.
5918 assert(is_internal_format(_class_name), "external class name format used internally");
5919
5920 if (!is_internal()) {
5921 if (log_is_enabled(Debug, class, preorder)){
5922 ResourceMark rm(THREAD);
5923 outputStream* log = Log(class, preorder)::debug_stream();
5924 log->print("%s", _class_name->as_klass_external_name());
5925 if (stream->source() != NULL) {
5926 log->print(" source: %s", stream->source());
5927 }
5928 log->cr();
5929 }
5930
5931 #if INCLUDE_CDS
5932 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5933 // Only dump the classes that can be stored into CDS archive.
5934 // Anonymous classes such as generated LambdaForm classes are also not included.
5935 if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
5936 _host_klass == NULL) {
5937 oop class_loader = _loader_data->class_loader();
5938 ResourceMark rm(THREAD);
5939 // For the boot and platform class loaders, check if the class is not found in the
5940 // java runtime image. Additional check for the boot class loader is if the class
5941 // is not found in the boot loader's appended entries. This indicates that the class
5942 // is not useable during run time, such as the ones found in the --patch-module entries,
5943 // so it should not be included in the classlist file.
5944 if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) ||
5945 SystemDictionary::is_platform_class_loader(class_loader)) &&
5946 !ClassLoader::is_jrt(stream->source())) {
5947 tty->print_cr("skip writing class %s from source %s to classlist file",
5948 _class_name->as_C_string(), stream->source());
5949 } else {
5950 classlist_file->print_cr("%s", _class_name->as_C_string());
5951 classlist_file->flush();
5952 }
5953 }
5954 }
5955 #endif
5956 }
5957
5958 // SUPERKLASS
5959 _super_class_index = stream->get_u2_fast();
5960 _super_klass = parse_super_class(cp,
5961 _super_class_index,
5962 _need_verify,
5963 CHECK);
5964
5965 // Interfaces
5966 _itfs_len = stream->get_u2_fast();
5967 parse_interfaces(stream,
5968 _itfs_len,
5969 cp,
5970 &_has_nonstatic_concrete_methods,
5971 CHECK);
5972
5973 assert(_local_interfaces != NULL, "invariant");
5974
5975 // Fields (offsets are filled in later)
5976 _fac = new FieldAllocationCount();
5977 parse_fields(stream,
5978 _access_flags.is_interface(),
5979 _fac,
5980 cp,
5981 cp_size,
5982 &_java_fields_count,
5983 CHECK);
5984
5985 assert(_fields != NULL, "invariant");
5986
5987 // Methods
5988 AccessFlags promoted_flags;
5989 parse_methods(stream,
5990 _access_flags.is_interface(),
5991 &promoted_flags,
5992 &_has_final_method,
5993 &_declares_nonstatic_concrete_methods,
5994 CHECK);
5995
5996 assert(_methods != NULL, "invariant");
5997
5998 // promote flags from parse_methods() to the klass' flags
5999 _access_flags.add_promoted_flags(promoted_flags.as_int());
6000
6001 if (_declares_nonstatic_concrete_methods) {
6002 _has_nonstatic_concrete_methods = true;
6003 }
6004
6005 // Additional attributes/annotations
6006 _parsed_annotations = new ClassAnnotationCollector();
6007 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6008
6009 assert(_inner_classes != NULL, "invariant");
6010
6011 // Finalize the Annotations metadata object,
6012 // now that all annotation arrays have been created.
6013 create_combined_annotations(CHECK);
6014
6015 // Make sure this is the end of class file stream
6016 guarantee_property(stream->at_eos(),
6017 "Extra bytes at the end of class file %s",
6018 CHECK);
6019
6020 // all bytes in stream read and parsed
6021 }
6022
6023 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6024 ConstantPool* cp,
6025 TRAPS) {
6026 assert(stream != NULL, "invariant");
6027 assert(stream->at_eos(), "invariant");
6028 assert(cp != NULL, "invariant");
6029 assert(_loader_data != NULL, "invariant");
6030
6031 if (_class_name == vmSymbols::java_lang_Object()) {
6032 check_property(_local_interfaces == Universe::the_empty_klass_array(),
6033 "java.lang.Object cannot implement an interface in class file %s",
6034 CHECK);
6035 }
6036 // We check super class after class file is parsed and format is checked
6037 if (_super_class_index > 0 && NULL ==_super_klass) {
6038 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6039 if (_access_flags.is_interface()) {
6040 // Before attempting to resolve the superclass, check for class format
6041 // errors not checked yet.
6042 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6043 "Interfaces must have java.lang.Object as superclass in class file %s",
6044 CHECK);
6045 }
6046 Handle loader(THREAD, _loader_data->class_loader());
6047 _super_klass = (const InstanceKlass*)
6048 SystemDictionary::resolve_super_or_fail(_class_name,
6049 super_class_name,
6050 loader,
6051 _protection_domain,
6052 true,
6053 CHECK);
6054 }
6055
6056 if (_super_klass != NULL) {
6057 if (_super_klass->has_nonstatic_concrete_methods()) {
6058 _has_nonstatic_concrete_methods = true;
6059 }
6060
6061 if (_super_klass->is_interface()) {
6062 ResourceMark rm(THREAD);
6063 Exceptions::fthrow(
6064 THREAD_AND_LOCATION,
6065 vmSymbols::java_lang_IncompatibleClassChangeError(),
6066 "class %s has interface %s as super class",
6067 _class_name->as_klass_external_name(),
6068 _super_klass->external_name()
6069 );
6070 return;
6071 }
6072 // Make sure super class is not final
6073 if (_super_klass->is_final()) {
6074 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6075 }
6076 }
6077
6078 // Compute the transitive list of all unique interfaces implemented by this class
6079 _transitive_interfaces =
6080 compute_transitive_interfaces(_super_klass,
6081 _local_interfaces,
6082 _loader_data,
6083 CHECK);
6084
6085 assert(_transitive_interfaces != NULL, "invariant");
6086
6087 // sort methods
6088 _method_ordering = sort_methods(_methods);
6089
6090 _all_mirandas = new GrowableArray<Method*>(20);
6091
6092 Handle loader(THREAD, _loader_data->class_loader());
6093 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6094 &_num_miranda_methods,
6095 _all_mirandas,
6096 _super_klass,
6097 _methods,
6098 _access_flags,
6099 _major_version,
6100 loader,
6101 _class_name,
6102 _local_interfaces,
6103 CHECK);
6104
6105 // Size of Java itable (in words)
6106 _itable_size = _access_flags.is_interface() ? 0 :
6107 klassItable::compute_itable_size(_transitive_interfaces);
6108
6109 assert(_fac != NULL, "invariant");
6110 assert(_parsed_annotations != NULL, "invariant");
6111
6112 _field_info = new FieldLayoutInfo();
6113 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6114
6115 // Compute reference typ
6116 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6117
6118 }
6119
6120 void ClassFileParser::set_klass(InstanceKlass* klass) {
6121
6122 #ifdef ASSERT
6123 if (klass != NULL) {
6124 assert(NULL == _klass, "leaking?");
6125 }
6126 #endif
6127
6128 _klass = klass;
6129 }
6130
6131 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6132
6133 #ifdef ASSERT
6134 if (klass != NULL) {
6135 assert(NULL == _klass_to_deallocate, "leaking?");
6136 }
6137 #endif
6138
6139 _klass_to_deallocate = klass;
6140 }
6141
6142 // Caller responsible for ResourceMark
6143 // clone stream with rewound position
6144 const ClassFileStream* ClassFileParser::clone_stream() const {
6145 assert(_stream != NULL, "invariant");
6146
6147 return _stream->clone();
6148 }
6149 // ----------------------------------------------------------------------------
6150 // debugging
6151
6152 #ifdef ASSERT
6153
6154 // return true if class_name contains no '.' (internal format is '/')
6155 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6156 if (class_name != NULL) {
6157 ResourceMark rm;
6158 char* name = class_name->as_C_string();
6159 return strchr(name, '.') == NULL;
6160 } else {
6161 return true;
6162 }
6163 }
6164
6165 #endif