1 /*
2 * Copyright (c) 1997, 2019, 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 "jvm.h"
26 #include "aot/aotLoader.hpp"
27 #include "classfile/classFileParser.hpp"
28 #include "classfile/classFileStream.hpp"
29 #include "classfile/classLoader.hpp"
30 #include "classfile/classLoaderData.inline.hpp"
31 #include "classfile/defaultMethods.hpp"
32 #include "classfile/dictionary.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/moduleEntry.hpp"
35 #include "classfile/symbolTable.hpp"
36 #include "classfile/systemDictionary.hpp"
37 #include "classfile/verificationType.hpp"
38 #include "classfile/verifier.hpp"
39 #include "classfile/vmSymbols.hpp"
40 #include "logging/log.hpp"
41 #include "logging/logStream.hpp"
42 #include "memory/allocation.hpp"
43 #include "memory/metadataFactory.hpp"
44 #include "memory/oopFactory.hpp"
45 #include "memory/resourceArea.hpp"
46 #include "memory/universe.hpp"
47 #include "oops/annotations.hpp"
48 #include "oops/constantPool.inline.hpp"
49 #include "oops/fieldStreams.hpp"
50 #include "oops/instanceKlass.hpp"
51 #include "oops/instanceMirrorKlass.hpp"
52 #include "oops/klass.inline.hpp"
53 #include "oops/klassVtable.hpp"
54 #include "oops/metadata.hpp"
55 #include "oops/method.inline.hpp"
56 #include "oops/oop.inline.hpp"
57 #include "oops/symbol.hpp"
58 #include "prims/jvmtiExport.hpp"
59 #include "prims/jvmtiThreadState.hpp"
60 #include "runtime/arguments.hpp"
61 #include "runtime/handles.inline.hpp"
62 #include "runtime/javaCalls.hpp"
63 #include "runtime/os.hpp"
64 #include "runtime/perfData.hpp"
65 #include "runtime/reflection.hpp"
66 #include "runtime/safepointVerifiers.hpp"
67 #include "runtime/signature.hpp"
68 #include "runtime/timer.hpp"
69 #include "services/classLoadingService.hpp"
70 #include "services/threadService.hpp"
71 #include "utilities/align.hpp"
72 #include "utilities/bitMap.inline.hpp"
73 #include "utilities/copy.hpp"
74 #include "utilities/exceptions.hpp"
75 #include "utilities/globalDefinitions.hpp"
76 #include "utilities/growableArray.hpp"
77 #include "utilities/macros.hpp"
78 #include "utilities/ostream.hpp"
79 #include "utilities/resourceHash.hpp"
80 #if INCLUDE_CDS
81 #include "classfile/systemDictionaryShared.hpp"
82 #endif
83 #if INCLUDE_JFR
84 #include "jfr/support/jfrTraceIdExtension.hpp"
85 #endif
86
87 // We generally try to create the oops directly when parsing, rather than
88 // allocating temporary data structures and copying the bytes twice. A
89 // temporary area is only needed when parsing utf8 entries in the constant
90 // pool and when parsing line number tables.
91
92 // We add assert in debug mode when class format is not checked.
93
94 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
95 #define JAVA_MIN_SUPPORTED_VERSION 45
96 #define JAVA_PREVIEW_MINOR_VERSION 65535
97
98 // Used for two backward compatibility reasons:
99 // - to check for new additions to the class file format in JDK1.5
100 // - to check for bug fixes in the format checker in JDK1.5
101 #define JAVA_1_5_VERSION 49
102
103 // Used for backward compatibility reasons:
104 // - to check for javac bug fixes that happened after 1.5
105 // - also used as the max version when running in jdk6
106 #define JAVA_6_VERSION 50
107
108 // Used for backward compatibility reasons:
109 // - to disallow argument and require ACC_STATIC for <clinit> methods
110 #define JAVA_7_VERSION 51
111
112 // Extension method support.
113 #define JAVA_8_VERSION 52
114
115 #define JAVA_9_VERSION 53
116
117 #define JAVA_10_VERSION 54
118
119 #define JAVA_11_VERSION 55
120
121 #define JAVA_12_VERSION 56
122
123 #define JAVA_13_VERSION 57
124
125 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
126 assert((bad_constant == 19 || bad_constant == 20) && _major_version >= JAVA_9_VERSION,
127 "Unexpected bad constant pool entry");
128 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
129 }
130
131 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
132 ConstantPool* cp,
133 const int length,
134 TRAPS) {
135 assert(stream != NULL, "invariant");
136 assert(cp != NULL, "invariant");
137
138 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
139 // this function (_current can be allocated in a register, with scalar
140 // replacement of aggregates). The _current pointer is copied back to
141 // stream() when this function returns. DON'T call another method within
142 // this method that uses stream().
143 const ClassFileStream cfs1 = *stream;
144 const ClassFileStream* const cfs = &cfs1;
145
146 assert(cfs->allocated_on_stack(), "should be local");
147 debug_only(const u1* const old_current = stream->current();)
148
149 // Used for batching symbol allocations.
150 const char* names[SymbolTable::symbol_alloc_batch_size];
151 int lengths[SymbolTable::symbol_alloc_batch_size];
152 int indices[SymbolTable::symbol_alloc_batch_size];
153 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
154 int names_count = 0;
155
156 // parsing Index 0 is unused
157 for (int index = 1; index < length; index++) {
158 // Each of the following case guarantees one more byte in the stream
159 // for the following tag or the access_flags following constant pool,
160 // so we don't need bounds-check for reading tag.
161 const u1 tag = cfs->get_u1_fast();
162 switch (tag) {
163 case JVM_CONSTANT_Class : {
164 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
165 const u2 name_index = cfs->get_u2_fast();
166 cp->klass_index_at_put(index, name_index);
167 break;
168 }
169 case JVM_CONSTANT_Fieldref: {
170 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
171 const u2 class_index = cfs->get_u2_fast();
172 const u2 name_and_type_index = cfs->get_u2_fast();
173 cp->field_at_put(index, class_index, name_and_type_index);
174 break;
175 }
176 case JVM_CONSTANT_Methodref: {
177 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
178 const u2 class_index = cfs->get_u2_fast();
179 const u2 name_and_type_index = cfs->get_u2_fast();
180 cp->method_at_put(index, class_index, name_and_type_index);
181 break;
182 }
183 case JVM_CONSTANT_InterfaceMethodref: {
184 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
185 const u2 class_index = cfs->get_u2_fast();
186 const u2 name_and_type_index = cfs->get_u2_fast();
187 cp->interface_method_at_put(index, class_index, name_and_type_index);
188 break;
189 }
190 case JVM_CONSTANT_String : {
191 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
192 const u2 string_index = cfs->get_u2_fast();
193 cp->string_index_at_put(index, string_index);
194 break;
195 }
196 case JVM_CONSTANT_MethodHandle :
197 case JVM_CONSTANT_MethodType: {
198 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
199 classfile_parse_error(
200 "Class file version does not support constant tag %u in class file %s",
201 tag, CHECK);
202 }
203 if (tag == JVM_CONSTANT_MethodHandle) {
204 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
205 const u1 ref_kind = cfs->get_u1_fast();
206 const u2 method_index = cfs->get_u2_fast();
207 cp->method_handle_index_at_put(index, ref_kind, method_index);
208 }
209 else if (tag == JVM_CONSTANT_MethodType) {
210 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
211 const u2 signature_index = cfs->get_u2_fast();
212 cp->method_type_index_at_put(index, signature_index);
213 }
214 else {
215 ShouldNotReachHere();
216 }
217 break;
218 }
219 case JVM_CONSTANT_Dynamic : {
220 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
221 classfile_parse_error(
222 "Class file version does not support constant tag %u in class file %s",
223 tag, CHECK);
224 }
225 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
226 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
227 const u2 name_and_type_index = cfs->get_u2_fast();
228 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
229 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
230 }
231 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
232 break;
233 }
234 case JVM_CONSTANT_InvokeDynamic : {
235 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
236 classfile_parse_error(
237 "Class file version does not support constant tag %u in class file %s",
238 tag, CHECK);
239 }
240 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
241 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
242 const u2 name_and_type_index = cfs->get_u2_fast();
243 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
244 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
245 }
246 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
247 break;
248 }
249 case JVM_CONSTANT_Integer: {
250 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
251 const u4 bytes = cfs->get_u4_fast();
252 cp->int_at_put(index, (jint)bytes);
253 break;
254 }
255 case JVM_CONSTANT_Float: {
256 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
257 const u4 bytes = cfs->get_u4_fast();
258 cp->float_at_put(index, *(jfloat*)&bytes);
259 break;
260 }
261 case JVM_CONSTANT_Long: {
262 // A mangled type might cause you to overrun allocated memory
263 guarantee_property(index + 1 < length,
264 "Invalid constant pool entry %u in class file %s",
265 index,
266 CHECK);
267 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
268 const u8 bytes = cfs->get_u8_fast();
269 cp->long_at_put(index, bytes);
270 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
271 break;
272 }
273 case JVM_CONSTANT_Double: {
274 // A mangled type might cause you to overrun allocated memory
275 guarantee_property(index+1 < length,
276 "Invalid constant pool entry %u in class file %s",
277 index,
278 CHECK);
279 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
280 const u8 bytes = cfs->get_u8_fast();
281 cp->double_at_put(index, *(jdouble*)&bytes);
282 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
283 break;
284 }
285 case JVM_CONSTANT_NameAndType: {
286 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
287 const u2 name_index = cfs->get_u2_fast();
288 const u2 signature_index = cfs->get_u2_fast();
289 cp->name_and_type_at_put(index, name_index, signature_index);
290 break;
291 }
292 case JVM_CONSTANT_Utf8 : {
293 cfs->guarantee_more(2, CHECK); // utf8_length
294 u2 utf8_length = cfs->get_u2_fast();
295 const u1* utf8_buffer = cfs->current();
296 assert(utf8_buffer != NULL, "null utf8 buffer");
297 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
298 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
299 cfs->skip_u1_fast(utf8_length);
300
301 // Before storing the symbol, make sure it's legal
302 if (_need_verify) {
303 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
304 }
305
306 if (has_cp_patch_at(index)) {
307 Handle patch = clear_cp_patch_at(index);
308 guarantee_property(java_lang_String::is_instance(patch()),
309 "Illegal utf8 patch at %d in class file %s",
310 index,
311 CHECK);
312 const char* const str = java_lang_String::as_utf8_string(patch());
313 // (could use java_lang_String::as_symbol instead, but might as well batch them)
314 utf8_buffer = (const u1*) str;
315 utf8_length = (int) strlen(str);
316 }
317
318 unsigned int hash;
319 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
320 utf8_length,
321 hash);
322 if (result == NULL) {
323 names[names_count] = (const char*)utf8_buffer;
324 lengths[names_count] = utf8_length;
325 indices[names_count] = index;
326 hashValues[names_count++] = hash;
327 if (names_count == SymbolTable::symbol_alloc_batch_size) {
328 SymbolTable::new_symbols(_loader_data,
329 cp,
330 names_count,
331 names,
332 lengths,
333 indices,
334 hashValues,
335 CHECK);
336 names_count = 0;
337 }
338 } else {
339 cp->symbol_at_put(index, result);
340 }
341 break;
342 }
343 case 19:
344 case 20: {
345 // Record that an error occurred in these two cases but keep parsing so
346 // that ACC_Module can be checked for in the access_flags. Need to
347 // throw NoClassDefFoundError in that case.
348 if (_major_version >= JAVA_9_VERSION) {
349 cfs->guarantee_more(3, CHECK);
350 cfs->get_u2_fast();
351 set_class_bad_constant_seen(tag);
352 break;
353 }
354 }
355 default: {
356 classfile_parse_error("Unknown constant tag %u in class file %s",
357 tag,
358 CHECK);
359 break;
360 }
361 } // end of switch(tag)
362 } // end of for
363
364 // Allocate the remaining symbols
365 if (names_count > 0) {
366 SymbolTable::new_symbols(_loader_data,
367 cp,
368 names_count,
369 names,
370 lengths,
371 indices,
372 hashValues,
373 CHECK);
374 }
375
376 // Copy _current pointer of local copy back to stream.
377 assert(stream->current() == old_current, "non-exclusive use of stream");
378 stream->set_current(cfs1.current());
379
380 }
381
382 static inline bool valid_cp_range(int index, int length) {
383 return (index > 0 && index < length);
384 }
385
386 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
387 assert(cp != NULL, "invariant");
388 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
389 return cp->symbol_at(index);
390 }
391 return NULL;
392 }
393
394 #ifdef ASSERT
395 PRAGMA_DIAG_PUSH
396 PRAGMA_FORMAT_NONLITERAL_IGNORED
397 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
398 ResourceMark rm(THREAD);
399 fatal(msg, _class_name->as_C_string());
400 }
401
402 void ClassFileParser::report_assert_property_failure(const char* msg,
403 int index,
404 TRAPS) const {
405 ResourceMark rm(THREAD);
406 fatal(msg, index, _class_name->as_C_string());
407 }
408 PRAGMA_DIAG_POP
409 #endif
410
411 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
412 ConstantPool* const cp,
413 const int length,
414 TRAPS) {
415 assert(cp != NULL, "invariant");
416 assert(stream != NULL, "invariant");
417
418 // parsing constant pool entries
419 parse_constant_pool_entries(stream, cp, length, CHECK);
420 if (class_bad_constant_seen() != 0) {
421 // a bad CP entry has been detected previously so stop parsing and just return.
422 return;
423 }
424
425 int index = 1; // declared outside of loops for portability
426 int num_klasses = 0;
427
428 // first verification pass - validate cross references
429 // and fixup class and string constants
430 for (index = 1; index < length; index++) { // Index 0 is unused
431 const jbyte tag = cp->tag_at(index).value();
432 switch (tag) {
433 case JVM_CONSTANT_Class: {
434 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
435 break;
436 }
437 case JVM_CONSTANT_Fieldref:
438 // fall through
439 case JVM_CONSTANT_Methodref:
440 // fall through
441 case JVM_CONSTANT_InterfaceMethodref: {
442 if (!_need_verify) break;
443 const int klass_ref_index = cp->klass_ref_index_at(index);
444 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
445 check_property(valid_klass_reference_at(klass_ref_index),
446 "Invalid constant pool index %u in class file %s",
447 klass_ref_index, CHECK);
448 check_property(valid_cp_range(name_and_type_ref_index, length) &&
449 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
450 "Invalid constant pool index %u in class file %s",
451 name_and_type_ref_index, CHECK);
452 break;
453 }
454 case JVM_CONSTANT_String: {
455 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
456 break;
457 }
458 case JVM_CONSTANT_Integer:
459 break;
460 case JVM_CONSTANT_Float:
461 break;
462 case JVM_CONSTANT_Long:
463 case JVM_CONSTANT_Double: {
464 index++;
465 check_property(
466 (index < length && cp->tag_at(index).is_invalid()),
467 "Improper constant pool long/double index %u in class file %s",
468 index, CHECK);
469 break;
470 }
471 case JVM_CONSTANT_NameAndType: {
472 if (!_need_verify) break;
473 const int name_ref_index = cp->name_ref_index_at(index);
474 const int signature_ref_index = cp->signature_ref_index_at(index);
475 check_property(valid_symbol_at(name_ref_index),
476 "Invalid constant pool index %u in class file %s",
477 name_ref_index, CHECK);
478 check_property(valid_symbol_at(signature_ref_index),
479 "Invalid constant pool index %u in class file %s",
480 signature_ref_index, CHECK);
481 break;
482 }
483 case JVM_CONSTANT_Utf8:
484 break;
485 case JVM_CONSTANT_UnresolvedClass: // fall-through
486 case JVM_CONSTANT_UnresolvedClassInError: {
487 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
488 break;
489 }
490 case JVM_CONSTANT_ClassIndex: {
491 const int class_index = cp->klass_index_at(index);
492 check_property(valid_symbol_at(class_index),
493 "Invalid constant pool index %u in class file %s",
494 class_index, CHECK);
495 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
496 break;
497 }
498 case JVM_CONSTANT_StringIndex: {
499 const int string_index = cp->string_index_at(index);
500 check_property(valid_symbol_at(string_index),
501 "Invalid constant pool index %u in class file %s",
502 string_index, CHECK);
503 Symbol* const sym = cp->symbol_at(string_index);
504 cp->unresolved_string_at_put(index, sym);
505 break;
506 }
507 case JVM_CONSTANT_MethodHandle: {
508 const int ref_index = cp->method_handle_index_at(index);
509 check_property(valid_cp_range(ref_index, length),
510 "Invalid constant pool index %u in class file %s",
511 ref_index, CHECK);
512 const constantTag tag = cp->tag_at(ref_index);
513 const int ref_kind = cp->method_handle_ref_kind_at(index);
514
515 switch (ref_kind) {
516 case JVM_REF_getField:
517 case JVM_REF_getStatic:
518 case JVM_REF_putField:
519 case JVM_REF_putStatic: {
520 check_property(
521 tag.is_field(),
522 "Invalid constant pool index %u in class file %s (not a field)",
523 ref_index, CHECK);
524 break;
525 }
526 case JVM_REF_invokeVirtual:
527 case JVM_REF_newInvokeSpecial: {
528 check_property(
529 tag.is_method(),
530 "Invalid constant pool index %u in class file %s (not a method)",
531 ref_index, CHECK);
532 break;
533 }
534 case JVM_REF_invokeStatic:
535 case JVM_REF_invokeSpecial: {
536 check_property(
537 tag.is_method() ||
538 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
539 "Invalid constant pool index %u in class file %s (not a method)",
540 ref_index, CHECK);
541 break;
542 }
543 case JVM_REF_invokeInterface: {
544 check_property(
545 tag.is_interface_method(),
546 "Invalid constant pool index %u in class file %s (not an interface method)",
547 ref_index, CHECK);
548 break;
549 }
550 default: {
551 classfile_parse_error(
552 "Bad method handle kind at constant pool index %u in class file %s",
553 index, CHECK);
554 }
555 } // switch(refkind)
556 // Keep the ref_index unchanged. It will be indirected at link-time.
557 break;
558 } // case MethodHandle
559 case JVM_CONSTANT_MethodType: {
560 const int ref_index = cp->method_type_index_at(index);
561 check_property(valid_symbol_at(ref_index),
562 "Invalid constant pool index %u in class file %s",
563 ref_index, CHECK);
564 break;
565 }
566 case JVM_CONSTANT_Dynamic: {
567 const int name_and_type_ref_index =
568 cp->bootstrap_name_and_type_ref_index_at(index);
569
570 check_property(valid_cp_range(name_and_type_ref_index, length) &&
571 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
572 "Invalid constant pool index %u in class file %s",
573 name_and_type_ref_index, CHECK);
574 // bootstrap specifier index must be checked later,
575 // when BootstrapMethods attr is available
576
577 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
578 cp->set_has_dynamic_constant();
579 break;
580 }
581 case JVM_CONSTANT_InvokeDynamic: {
582 const int name_and_type_ref_index =
583 cp->bootstrap_name_and_type_ref_index_at(index);
584
585 check_property(valid_cp_range(name_and_type_ref_index, length) &&
586 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
587 "Invalid constant pool index %u in class file %s",
588 name_and_type_ref_index, CHECK);
589 // bootstrap specifier index must be checked later,
590 // when BootstrapMethods attr is available
591 break;
592 }
593 default: {
594 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
595 ShouldNotReachHere();
596 break;
597 }
598 } // switch(tag)
599 } // end of for
600
601 _first_patched_klass_resolved_index = num_klasses;
602 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
603
604 if (_cp_patches != NULL) {
605 // need to treat this_class specially...
606
607 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
608 // for now. These will be replaced with actual names of the patched classes in patch_class().
609 Symbol* s = vmSymbols::star_name();
610 for (int n=_orig_cp_size; n<cp->length(); n++) {
611 cp->symbol_at_put(n, s);
612 }
613
614 int this_class_index;
615 {
616 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
617 const u1* const mark = stream->current();
618 stream->skip_u2_fast(1); // skip flags
619 this_class_index = stream->get_u2_fast();
620 stream->set_current(mark); // revert to mark
621 }
622
623 for (index = 1; index < length; index++) { // Index 0 is unused
624 if (has_cp_patch_at(index)) {
625 guarantee_property(index != this_class_index,
626 "Illegal constant pool patch to self at %d in class file %s",
627 index, CHECK);
628 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
629 }
630 }
631 }
632
633 if (!_need_verify) {
634 return;
635 }
636
637 // second verification pass - checks the strings are of the right format.
638 // but not yet to the other entries
639 for (index = 1; index < length; index++) {
640 const jbyte tag = cp->tag_at(index).value();
641 switch (tag) {
642 case JVM_CONSTANT_UnresolvedClass: {
643 const Symbol* const class_name = cp->klass_name_at(index);
644 // check the name, even if _cp_patches will overwrite it
645 verify_legal_class_name(class_name, CHECK);
646 break;
647 }
648 case JVM_CONSTANT_NameAndType: {
649 if (_need_verify) {
650 const int sig_index = cp->signature_ref_index_at(index);
651 const int name_index = cp->name_ref_index_at(index);
652 const Symbol* const name = cp->symbol_at(name_index);
653 const Symbol* const sig = cp->symbol_at(sig_index);
654 guarantee_property(sig->utf8_length() != 0,
655 "Illegal zero length constant pool entry at %d in class %s",
656 sig_index, CHECK);
657 guarantee_property(name->utf8_length() != 0,
658 "Illegal zero length constant pool entry at %d in class %s",
659 name_index, CHECK);
660
661 if (sig->char_at(0) == JVM_SIGNATURE_FUNC) {
662 // Format check method name and signature
663 verify_legal_method_name(name, CHECK);
664 verify_legal_method_signature(name, sig, CHECK);
665 } else {
666 // Format check field name and signature
667 verify_legal_field_name(name, CHECK);
668 verify_legal_field_signature(name, sig, CHECK);
669 }
670 }
671 break;
672 }
673 case JVM_CONSTANT_Dynamic: {
674 const int name_and_type_ref_index =
675 cp->name_and_type_ref_index_at(index);
676 // already verified to be utf8
677 const int name_ref_index =
678 cp->name_ref_index_at(name_and_type_ref_index);
679 // already verified to be utf8
680 const int signature_ref_index =
681 cp->signature_ref_index_at(name_and_type_ref_index);
682 const Symbol* const name = cp->symbol_at(name_ref_index);
683 const Symbol* const signature = cp->symbol_at(signature_ref_index);
684 if (_need_verify) {
685 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
686 // Need only to be sure signature is non-zero length and the right type.
687 if (signature->utf8_length() == 0 ||
688 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
689 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
690 }
691 }
692 break;
693 }
694 case JVM_CONSTANT_InvokeDynamic:
695 case JVM_CONSTANT_Fieldref:
696 case JVM_CONSTANT_Methodref:
697 case JVM_CONSTANT_InterfaceMethodref: {
698 const int name_and_type_ref_index =
699 cp->name_and_type_ref_index_at(index);
700 // already verified to be utf8
701 const int name_ref_index =
702 cp->name_ref_index_at(name_and_type_ref_index);
703 // already verified to be utf8
704 const int signature_ref_index =
705 cp->signature_ref_index_at(name_and_type_ref_index);
706 const Symbol* const name = cp->symbol_at(name_ref_index);
707 const Symbol* const signature = cp->symbol_at(signature_ref_index);
708 if (tag == JVM_CONSTANT_Fieldref) {
709 if (_need_verify) {
710 // Field name and signature are verified above, when iterating NameAndType_info.
711 // Need only to be sure signature is non-zero length and the right type.
712 if (signature->utf8_length() == 0 ||
713 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
714 throwIllegalSignature("Field", name, signature, CHECK);
715 }
716 }
717 } else {
718 if (_need_verify) {
719 // Method name and signature are verified above, when iterating NameAndType_info.
720 // Need only to be sure signature is non-zero length and the right type.
721 if (signature->utf8_length() == 0 ||
722 signature->char_at(0) != JVM_SIGNATURE_FUNC) {
723 throwIllegalSignature("Method", name, signature, CHECK);
724 }
725 }
726 // 4509014: If a class method name begins with '<', it must be "<init>"
727 const unsigned int name_len = name->utf8_length();
728 if (tag == JVM_CONSTANT_Methodref &&
729 name_len != 0 &&
730 name->char_at(0) == '<' &&
731 name != vmSymbols::object_initializer_name()) {
732 classfile_parse_error(
733 "Bad method name at constant pool index %u in class file %s",
734 name_ref_index, CHECK);
735 }
736 }
737 break;
738 }
739 case JVM_CONSTANT_MethodHandle: {
740 const int ref_index = cp->method_handle_index_at(index);
741 const int ref_kind = cp->method_handle_ref_kind_at(index);
742 switch (ref_kind) {
743 case JVM_REF_invokeVirtual:
744 case JVM_REF_invokeStatic:
745 case JVM_REF_invokeSpecial:
746 case JVM_REF_newInvokeSpecial: {
747 const int name_and_type_ref_index =
748 cp->name_and_type_ref_index_at(ref_index);
749 const int name_ref_index =
750 cp->name_ref_index_at(name_and_type_ref_index);
751 const Symbol* const name = cp->symbol_at(name_ref_index);
752 if (ref_kind == JVM_REF_newInvokeSpecial) {
753 if (name != vmSymbols::object_initializer_name()) {
754 classfile_parse_error(
755 "Bad constructor name at constant pool index %u in class file %s",
756 name_ref_index, CHECK);
757 }
758 } else {
759 if (name == vmSymbols::object_initializer_name()) {
760 classfile_parse_error(
761 "Bad method name at constant pool index %u in class file %s",
762 name_ref_index, CHECK);
763 }
764 }
765 break;
766 }
767 // Other ref_kinds are already fully checked in previous pass.
768 } // switch(ref_kind)
769 break;
770 }
771 case JVM_CONSTANT_MethodType: {
772 const Symbol* const no_name = vmSymbols::type_name(); // place holder
773 const Symbol* const signature = cp->method_type_signature_at(index);
774 verify_legal_method_signature(no_name, signature, CHECK);
775 break;
776 }
777 case JVM_CONSTANT_Utf8: {
778 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
779 }
780 } // switch(tag)
781 } // end of for
782 }
783
784 Handle ClassFileParser::clear_cp_patch_at(int index) {
785 Handle patch = cp_patch_at(index);
786 _cp_patches->at_put(index, Handle());
787 assert(!has_cp_patch_at(index), "");
788 return patch;
789 }
790
791 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
792 int name_index = _orig_cp_size + _num_patched_klasses;
793 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
794
795 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
796 _num_patched_klasses ++;
797 }
798
799 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
800 int index,
801 Handle patch,
802 TRAPS) {
803 assert(cp != NULL, "invariant");
804
805 BasicType patch_type = T_VOID;
806
807 switch (cp->tag_at(index).value()) {
808
809 case JVM_CONSTANT_UnresolvedClass: {
810 // Patching a class means pre-resolving it.
811 // The name in the constant pool is ignored.
812 if (java_lang_Class::is_instance(patch())) {
813 guarantee_property(!java_lang_Class::is_primitive(patch()),
814 "Illegal class patch at %d in class file %s",
815 index, CHECK);
816 Klass* k = java_lang_Class::as_Klass(patch());
817 patch_class(cp, index, k, k->name());
818 } else {
819 guarantee_property(java_lang_String::is_instance(patch()),
820 "Illegal class patch at %d in class file %s",
821 index, CHECK);
822 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
823 patch_class(cp, index, NULL, name);
824 }
825 break;
826 }
827
828 case JVM_CONSTANT_String: {
829 // skip this patch and don't clear it. Needs the oop array for resolved
830 // references to be created first.
831 return;
832 }
833 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
834 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
835 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
836 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
837 patch_prim:
838 {
839 jvalue value;
840 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
841 guarantee_property(value_type == patch_type,
842 "Illegal primitive patch at %d in class file %s",
843 index, CHECK);
844 switch (value_type) {
845 case T_INT: cp->int_at_put(index, value.i); break;
846 case T_FLOAT: cp->float_at_put(index, value.f); break;
847 case T_LONG: cp->long_at_put(index, value.j); break;
848 case T_DOUBLE: cp->double_at_put(index, value.d); break;
849 default: assert(false, "");
850 }
851 } // end patch_prim label
852 break;
853
854 default: {
855 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
856 guarantee_property(!has_cp_patch_at(index),
857 "Illegal unexpected patch at %d in class file %s",
858 index, CHECK);
859 return;
860 }
861 } // end of switch(tag)
862
863 // On fall-through, mark the patch as used.
864 clear_cp_patch_at(index);
865 }
866 class NameSigHash: public ResourceObj {
867 public:
868 const Symbol* _name; // name
869 const Symbol* _sig; // signature
870 NameSigHash* _next; // Next entry in hash table
871 };
872
873 static const int HASH_ROW_SIZE = 256;
874
875 static unsigned int hash(const Symbol* name, const Symbol* sig) {
876 unsigned int raw_hash = 0;
877 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
878 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
879
880 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
881 }
882
883
884 static void initialize_hashtable(NameSigHash** table) {
885 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
886 }
887 // Return false if the name/sig combination is found in table.
888 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
889 // The old format checker uses heap sort to find duplicates.
890 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
891 // of table since we don't expect Symbol*'s to move.
892 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
893 assert(name != NULL, "name in constant pool is NULL");
894
895 // First lookup for duplicates
896 int index = hash(name, sig);
897 NameSigHash* entry = table[index];
898 while (entry != NULL) {
899 if (entry->_name == name && entry->_sig == sig) {
900 return false;
901 }
902 entry = entry->_next;
903 }
904
905 // No duplicate is found, allocate a new entry and fill it.
906 entry = new NameSigHash();
907 entry->_name = name;
908 entry->_sig = sig;
909
910 // Insert into hash table
911 entry->_next = table[index];
912 table[index] = entry;
913
914 return true;
915 }
916
917 // Side-effects: populates the _local_interfaces field
918 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
919 const int itfs_len,
920 ConstantPool* const cp,
921 bool* const has_nonstatic_concrete_methods,
922 TRAPS) {
923 assert(stream != NULL, "invariant");
924 assert(cp != NULL, "invariant");
925 assert(has_nonstatic_concrete_methods != NULL, "invariant");
926
927 if (itfs_len == 0) {
928 _local_interfaces = Universe::the_empty_instance_klass_array();
929 } else {
930 assert(itfs_len > 0, "only called for len>0");
931 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
932
933 int index;
934 for (index = 0; index < itfs_len; index++) {
935 const u2 interface_index = stream->get_u2(CHECK);
936 Klass* interf;
937 check_property(
938 valid_klass_reference_at(interface_index),
939 "Interface name has bad constant pool index %u in class file %s",
940 interface_index, CHECK);
941 if (cp->tag_at(interface_index).is_klass()) {
942 interf = cp->resolved_klass_at(interface_index);
943 } else {
944 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
945
946 // Don't need to check legal name because it's checked when parsing constant pool.
947 // But need to make sure it's not an array type.
948 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
949 "Bad interface name in class file %s", CHECK);
950
951 // Call resolve_super so classcircularity is checked
952 interf = SystemDictionary::resolve_super_or_fail(
953 _class_name,
954 unresolved_klass,
955 Handle(THREAD, _loader_data->class_loader()),
956 _protection_domain,
957 false,
958 CHECK);
959 }
960
961 if (!interf->is_interface()) {
962 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
963 err_msg("class %s can not implement %s, because it is not an interface (%s)",
964 _class_name->as_klass_external_name(),
965 interf->external_name(),
966 interf->class_in_module_of_loader()));
967 }
968
969 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
970 *has_nonstatic_concrete_methods = true;
971 }
972 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
973 }
974
975 if (!_need_verify || itfs_len <= 1) {
976 return;
977 }
978
979 // Check if there's any duplicates in interfaces
980 ResourceMark rm(THREAD);
981 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
982 NameSigHash*,
983 HASH_ROW_SIZE);
984 initialize_hashtable(interface_names);
985 bool dup = false;
986 const Symbol* name = NULL;
987 {
988 debug_only(NoSafepointVerifier nsv;)
989 for (index = 0; index < itfs_len; index++) {
990 const InstanceKlass* const k = _local_interfaces->at(index);
991 name = k->name();
992 // If no duplicates, add (name, NULL) in hashtable interface_names.
993 if (!put_after_lookup(name, NULL, interface_names)) {
994 dup = true;
995 break;
996 }
997 }
998 }
999 if (dup) {
1000 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
1001 name->as_C_string(), CHECK);
1002 }
1003 }
1004 }
1005
1006 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
1007 int constantvalue_index,
1008 int signature_index,
1009 TRAPS) const {
1010 // Make sure the constant pool entry is of a type appropriate to this field
1011 guarantee_property(
1012 (constantvalue_index > 0 &&
1013 constantvalue_index < cp->length()),
1014 "Bad initial value index %u in ConstantValue attribute in class file %s",
1015 constantvalue_index, CHECK);
1016
1017 const constantTag value_type = cp->tag_at(constantvalue_index);
1018 switch(cp->basic_type_for_signature_at(signature_index)) {
1019 case T_LONG: {
1020 guarantee_property(value_type.is_long(),
1021 "Inconsistent constant value type in class file %s",
1022 CHECK);
1023 break;
1024 }
1025 case T_FLOAT: {
1026 guarantee_property(value_type.is_float(),
1027 "Inconsistent constant value type in class file %s",
1028 CHECK);
1029 break;
1030 }
1031 case T_DOUBLE: {
1032 guarantee_property(value_type.is_double(),
1033 "Inconsistent constant value type in class file %s",
1034 CHECK);
1035 break;
1036 }
1037 case T_BYTE:
1038 case T_CHAR:
1039 case T_SHORT:
1040 case T_BOOLEAN:
1041 case T_INT: {
1042 guarantee_property(value_type.is_int(),
1043 "Inconsistent constant value type in class file %s",
1044 CHECK);
1045 break;
1046 }
1047 case T_OBJECT: {
1048 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1049 && value_type.is_string()),
1050 "Bad string initial value in class file %s",
1051 CHECK);
1052 break;
1053 }
1054 default: {
1055 classfile_parse_error("Unable to set initial value %u in class file %s",
1056 constantvalue_index,
1057 CHECK);
1058 }
1059 }
1060 }
1061
1062 class AnnotationCollector : public ResourceObj{
1063 public:
1064 enum Location { _in_field, _in_method, _in_class };
1065 enum ID {
1066 _unknown = 0,
1067 _method_CallerSensitive,
1068 _method_ForceInline,
1069 _method_DontInline,
1070 _method_InjectedProfile,
1071 _method_LambdaForm_Compiled,
1072 _method_Hidden,
1073 _method_HotSpotIntrinsicCandidate,
1074 _jdk_internal_vm_annotation_Contended,
1075 _field_Stable,
1076 _jdk_internal_vm_annotation_ReservedStackAccess,
1077 _annotation_LIMIT
1078 };
1079 const Location _location;
1080 int _annotations_present;
1081 u2 _contended_group;
1082
1083 AnnotationCollector(Location location)
1084 : _location(location), _annotations_present(0)
1085 {
1086 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1087 }
1088 // If this annotation name has an ID, report it (or _none).
1089 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1090 // Set the annotation name:
1091 void set_annotation(ID id) {
1092 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1093 _annotations_present |= nth_bit((int)id);
1094 }
1095
1096 void remove_annotation(ID id) {
1097 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1098 _annotations_present &= ~nth_bit((int)id);
1099 }
1100
1101 // Report if the annotation is present.
1102 bool has_any_annotations() const { return _annotations_present != 0; }
1103 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1104
1105 void set_contended_group(u2 group) { _contended_group = group; }
1106 u2 contended_group() const { return _contended_group; }
1107
1108 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1109
1110 void set_stable(bool stable) { set_annotation(_field_Stable); }
1111 bool is_stable() const { return has_annotation(_field_Stable); }
1112 };
1113
1114 // This class also doubles as a holder for metadata cleanup.
1115 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1116 private:
1117 ClassLoaderData* _loader_data;
1118 AnnotationArray* _field_annotations;
1119 AnnotationArray* _field_type_annotations;
1120 public:
1121 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1122 AnnotationCollector(_in_field),
1123 _loader_data(loader_data),
1124 _field_annotations(NULL),
1125 _field_type_annotations(NULL) {}
1126 ~FieldAnnotationCollector();
1127 void apply_to(FieldInfo* f);
1128 AnnotationArray* field_annotations() { return _field_annotations; }
1129 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1130
1131 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1132 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1133 };
1134
1135 class MethodAnnotationCollector : public AnnotationCollector{
1136 public:
1137 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1138 void apply_to(const methodHandle& m);
1139 };
1140
1141 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1142 public:
1143 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1144 void apply_to(InstanceKlass* ik);
1145 };
1146
1147
1148 static int skip_annotation_value(const u1*, int, int); // fwd decl
1149
1150 // Safely increment index by val if does not pass limit
1151 #define SAFE_ADD(index, limit, val) \
1152 if (index >= limit - val) return limit; \
1153 index += val;
1154
1155 // Skip an annotation. Return >=limit if there is any problem.
1156 static int skip_annotation(const u1* buffer, int limit, int index) {
1157 assert(buffer != NULL, "invariant");
1158 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1159 // value := switch (tag:u1) { ... }
1160 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1161 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1162 while (--nmem >= 0 && index < limit) {
1163 SAFE_ADD(index, limit, 2); // skip member
1164 index = skip_annotation_value(buffer, limit, index);
1165 }
1166 return index;
1167 }
1168
1169 // Skip an annotation value. Return >=limit if there is any problem.
1170 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1171 assert(buffer != NULL, "invariant");
1172
1173 // value := switch (tag:u1) {
1174 // case B, C, I, S, Z, D, F, J, c: con:u2;
1175 // case e: e_class:u2 e_name:u2;
1176 // case s: s_con:u2;
1177 // case [: do(nval:u2) {value};
1178 // case @: annotation;
1179 // case s: s_con:u2;
1180 // }
1181 SAFE_ADD(index, limit, 1); // read tag
1182 const u1 tag = buffer[index - 1];
1183 switch (tag) {
1184 case 'B':
1185 case 'C':
1186 case 'I':
1187 case 'S':
1188 case 'Z':
1189 case 'D':
1190 case 'F':
1191 case 'J':
1192 case 'c':
1193 case 's':
1194 SAFE_ADD(index, limit, 2); // skip con or s_con
1195 break;
1196 case 'e':
1197 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1198 break;
1199 case '[':
1200 {
1201 SAFE_ADD(index, limit, 2); // read nval
1202 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1203 while (--nval >= 0 && index < limit) {
1204 index = skip_annotation_value(buffer, limit, index);
1205 }
1206 }
1207 break;
1208 case '@':
1209 index = skip_annotation(buffer, limit, index);
1210 break;
1211 default:
1212 return limit; // bad tag byte
1213 }
1214 return index;
1215 }
1216
1217 // Sift through annotations, looking for those significant to the VM:
1218 static void parse_annotations(const ConstantPool* const cp,
1219 const u1* buffer, int limit,
1220 AnnotationCollector* coll,
1221 ClassLoaderData* loader_data,
1222 TRAPS) {
1223
1224 assert(cp != NULL, "invariant");
1225 assert(buffer != NULL, "invariant");
1226 assert(coll != NULL, "invariant");
1227 assert(loader_data != NULL, "invariant");
1228
1229 // annotations := do(nann:u2) {annotation}
1230 int index = 2; // read nann
1231 if (index >= limit) return;
1232 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1233 enum { // initial annotation layout
1234 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1235 count_off = 2, // u2 such as 1 (one value)
1236 member_off = 4, // utf8 such as 'value'
1237 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1238 e_tag_val = 'e',
1239 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1240 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1241 e_size = 11, // end of 'e' annotation
1242 c_tag_val = 'c', // payload is type
1243 c_con_off = 7, // utf8 payload, such as 'I'
1244 c_size = 9, // end of 'c' annotation
1245 s_tag_val = 's', // payload is String
1246 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1247 s_size = 9,
1248 min_size = 6 // smallest possible size (zero members)
1249 };
1250 // Cannot add min_size to index in case of overflow MAX_INT
1251 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1252 int index0 = index;
1253 index = skip_annotation(buffer, limit, index);
1254 const u1* const abase = buffer + index0;
1255 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1256 const int count = Bytes::get_Java_u2((address)abase + count_off);
1257 const Symbol* const aname = check_symbol_at(cp, atype);
1258 if (aname == NULL) break; // invalid annotation name
1259 const Symbol* member = NULL;
1260 if (count >= 1) {
1261 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1262 member = check_symbol_at(cp, member_index);
1263 if (member == NULL) break; // invalid member name
1264 }
1265
1266 // Here is where parsing particular annotations will take place.
1267 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1268 if (AnnotationCollector::_unknown == id) continue;
1269 coll->set_annotation(id);
1270
1271 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1272 // @Contended can optionally specify the contention group.
1273 //
1274 // Contended group defines the equivalence class over the fields:
1275 // the fields within the same contended group are not treated distinct.
1276 // The only exception is default group, which does not incur the
1277 // equivalence. Naturally, contention group for classes is meaningless.
1278 //
1279 // While the contention group is specified as String, annotation
1280 // values are already interned, and we might as well use the constant
1281 // pool index as the group tag.
1282 //
1283 u2 group_index = 0; // default contended group
1284 if (count == 1
1285 && s_size == (index - index0) // match size
1286 && s_tag_val == *(abase + tag_off)
1287 && member == vmSymbols::value_name()) {
1288 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1289 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1290 group_index = 0; // default contended group
1291 }
1292 }
1293 coll->set_contended_group(group_index);
1294 }
1295 }
1296 }
1297
1298
1299 // Parse attributes for a field.
1300 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1301 u2 attributes_count,
1302 bool is_static, u2 signature_index,
1303 u2* const constantvalue_index_addr,
1304 bool* const is_synthetic_addr,
1305 u2* const generic_signature_index_addr,
1306 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1307 TRAPS) {
1308 assert(cfs != NULL, "invariant");
1309 assert(constantvalue_index_addr != NULL, "invariant");
1310 assert(is_synthetic_addr != NULL, "invariant");
1311 assert(generic_signature_index_addr != NULL, "invariant");
1312 assert(parsed_annotations != NULL, "invariant");
1313 assert(attributes_count > 0, "attributes_count should be greater than 0");
1314
1315 u2 constantvalue_index = 0;
1316 u2 generic_signature_index = 0;
1317 bool is_synthetic = false;
1318 const u1* runtime_visible_annotations = NULL;
1319 int runtime_visible_annotations_length = 0;
1320 const u1* runtime_invisible_annotations = NULL;
1321 int runtime_invisible_annotations_length = 0;
1322 const u1* runtime_visible_type_annotations = NULL;
1323 int runtime_visible_type_annotations_length = 0;
1324 const u1* runtime_invisible_type_annotations = NULL;
1325 int runtime_invisible_type_annotations_length = 0;
1326 bool runtime_invisible_annotations_exists = false;
1327 bool runtime_invisible_type_annotations_exists = false;
1328 const ConstantPool* const cp = _cp;
1329
1330 while (attributes_count--) {
1331 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1332 const u2 attribute_name_index = cfs->get_u2_fast();
1333 const u4 attribute_length = cfs->get_u4_fast();
1334 check_property(valid_symbol_at(attribute_name_index),
1335 "Invalid field attribute index %u in class file %s",
1336 attribute_name_index,
1337 CHECK);
1338
1339 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1340 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1341 // ignore if non-static
1342 if (constantvalue_index != 0) {
1343 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1344 }
1345 check_property(
1346 attribute_length == 2,
1347 "Invalid ConstantValue field attribute length %u in class file %s",
1348 attribute_length, CHECK);
1349
1350 constantvalue_index = cfs->get_u2(CHECK);
1351 if (_need_verify) {
1352 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1353 }
1354 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1355 if (attribute_length != 0) {
1356 classfile_parse_error(
1357 "Invalid Synthetic field attribute length %u in class file %s",
1358 attribute_length, CHECK);
1359 }
1360 is_synthetic = true;
1361 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1362 if (attribute_length != 0) {
1363 classfile_parse_error(
1364 "Invalid Deprecated field attribute length %u in class file %s",
1365 attribute_length, CHECK);
1366 }
1367 } else if (_major_version >= JAVA_1_5_VERSION) {
1368 if (attribute_name == vmSymbols::tag_signature()) {
1369 if (generic_signature_index != 0) {
1370 classfile_parse_error(
1371 "Multiple Signature attributes for field in class file %s", CHECK);
1372 }
1373 if (attribute_length != 2) {
1374 classfile_parse_error(
1375 "Wrong size %u for field's Signature attribute in class file %s",
1376 attribute_length, CHECK);
1377 }
1378 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1379 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1380 if (runtime_visible_annotations != NULL) {
1381 classfile_parse_error(
1382 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1383 }
1384 runtime_visible_annotations_length = attribute_length;
1385 runtime_visible_annotations = cfs->current();
1386 assert(runtime_visible_annotations != NULL, "null visible annotations");
1387 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1388 parse_annotations(cp,
1389 runtime_visible_annotations,
1390 runtime_visible_annotations_length,
1391 parsed_annotations,
1392 _loader_data,
1393 CHECK);
1394 cfs->skip_u1_fast(runtime_visible_annotations_length);
1395 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1396 if (runtime_invisible_annotations_exists) {
1397 classfile_parse_error(
1398 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1399 }
1400 runtime_invisible_annotations_exists = true;
1401 if (PreserveAllAnnotations) {
1402 runtime_invisible_annotations_length = attribute_length;
1403 runtime_invisible_annotations = cfs->current();
1404 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1405 }
1406 cfs->skip_u1(attribute_length, CHECK);
1407 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1408 if (runtime_visible_type_annotations != NULL) {
1409 classfile_parse_error(
1410 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1411 }
1412 runtime_visible_type_annotations_length = attribute_length;
1413 runtime_visible_type_annotations = cfs->current();
1414 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1415 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1416 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1417 if (runtime_invisible_type_annotations_exists) {
1418 classfile_parse_error(
1419 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1420 } else {
1421 runtime_invisible_type_annotations_exists = true;
1422 }
1423 if (PreserveAllAnnotations) {
1424 runtime_invisible_type_annotations_length = attribute_length;
1425 runtime_invisible_type_annotations = cfs->current();
1426 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1427 }
1428 cfs->skip_u1(attribute_length, CHECK);
1429 } else {
1430 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1431 }
1432 } else {
1433 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1434 }
1435 }
1436
1437 *constantvalue_index_addr = constantvalue_index;
1438 *is_synthetic_addr = is_synthetic;
1439 *generic_signature_index_addr = generic_signature_index;
1440 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1441 runtime_visible_annotations_length,
1442 runtime_invisible_annotations,
1443 runtime_invisible_annotations_length,
1444 CHECK);
1445 parsed_annotations->set_field_annotations(a);
1446 a = assemble_annotations(runtime_visible_type_annotations,
1447 runtime_visible_type_annotations_length,
1448 runtime_invisible_type_annotations,
1449 runtime_invisible_type_annotations_length,
1450 CHECK);
1451 parsed_annotations->set_field_type_annotations(a);
1452 return;
1453 }
1454
1455
1456 // Field allocation types. Used for computing field offsets.
1457
1458 enum FieldAllocationType {
1459 STATIC_OOP, // Oops
1460 STATIC_BYTE, // Boolean, Byte, char
1461 STATIC_SHORT, // shorts
1462 STATIC_WORD, // ints
1463 STATIC_DOUBLE, // aligned long or double
1464 NONSTATIC_OOP,
1465 NONSTATIC_BYTE,
1466 NONSTATIC_SHORT,
1467 NONSTATIC_WORD,
1468 NONSTATIC_DOUBLE,
1469 MAX_FIELD_ALLOCATION_TYPE,
1470 BAD_ALLOCATION_TYPE = -1
1471 };
1472
1473 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1474 BAD_ALLOCATION_TYPE, // 0
1475 BAD_ALLOCATION_TYPE, // 1
1476 BAD_ALLOCATION_TYPE, // 2
1477 BAD_ALLOCATION_TYPE, // 3
1478 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1479 NONSTATIC_SHORT, // T_CHAR = 5,
1480 NONSTATIC_WORD, // T_FLOAT = 6,
1481 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1482 NONSTATIC_BYTE, // T_BYTE = 8,
1483 NONSTATIC_SHORT, // T_SHORT = 9,
1484 NONSTATIC_WORD, // T_INT = 10,
1485 NONSTATIC_DOUBLE, // T_LONG = 11,
1486 NONSTATIC_OOP, // T_OBJECT = 12,
1487 NONSTATIC_OOP, // T_ARRAY = 13,
1488 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1489 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1490 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1491 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1492 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1493 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1494 BAD_ALLOCATION_TYPE, // 0
1495 BAD_ALLOCATION_TYPE, // 1
1496 BAD_ALLOCATION_TYPE, // 2
1497 BAD_ALLOCATION_TYPE, // 3
1498 STATIC_BYTE , // T_BOOLEAN = 4,
1499 STATIC_SHORT, // T_CHAR = 5,
1500 STATIC_WORD, // T_FLOAT = 6,
1501 STATIC_DOUBLE, // T_DOUBLE = 7,
1502 STATIC_BYTE, // T_BYTE = 8,
1503 STATIC_SHORT, // T_SHORT = 9,
1504 STATIC_WORD, // T_INT = 10,
1505 STATIC_DOUBLE, // T_LONG = 11,
1506 STATIC_OOP, // T_OBJECT = 12,
1507 STATIC_OOP, // T_ARRAY = 13,
1508 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1509 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1510 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1511 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1512 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1513 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1514 };
1515
1516 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1517 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1518 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1519 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1520 return result;
1521 }
1522
1523 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1524 public:
1525 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1526
1527 FieldAllocationCount() {
1528 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1529 count[i] = 0;
1530 }
1531 }
1532
1533 FieldAllocationType update(bool is_static, BasicType type) {
1534 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1535 if (atype != BAD_ALLOCATION_TYPE) {
1536 // Make sure there is no overflow with injected fields.
1537 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1538 count[atype]++;
1539 }
1540 return atype;
1541 }
1542 };
1543
1544 // Side-effects: populates the _fields, _fields_annotations,
1545 // _fields_type_annotations fields
1546 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1547 bool is_interface,
1548 FieldAllocationCount* const fac,
1549 ConstantPool* cp,
1550 const int cp_size,
1551 u2* const java_fields_count_ptr,
1552 TRAPS) {
1553
1554 assert(cfs != NULL, "invariant");
1555 assert(fac != NULL, "invariant");
1556 assert(cp != NULL, "invariant");
1557 assert(java_fields_count_ptr != NULL, "invariant");
1558
1559 assert(NULL == _fields, "invariant");
1560 assert(NULL == _fields_annotations, "invariant");
1561 assert(NULL == _fields_type_annotations, "invariant");
1562
1563 cfs->guarantee_more(2, CHECK); // length
1564 const u2 length = cfs->get_u2_fast();
1565 *java_fields_count_ptr = length;
1566
1567 int num_injected = 0;
1568 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1569 &num_injected);
1570 const int total_fields = length + num_injected;
1571
1572 // The field array starts with tuples of shorts
1573 // [access, name index, sig index, initial value index, byte offset].
1574 // A generic signature slot only exists for field with generic
1575 // signature attribute. And the access flag is set with
1576 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1577 // signature slots are at the end of the field array and after all
1578 // other fields data.
1579 //
1580 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1581 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1582 // ...
1583 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1584 // [generic signature index]
1585 // [generic signature index]
1586 // ...
1587 //
1588 // Allocate a temporary resource array for field data. For each field,
1589 // a slot is reserved in the temporary array for the generic signature
1590 // index. After parsing all fields, the data are copied to a permanent
1591 // array and any unused slots will be discarded.
1592 ResourceMark rm(THREAD);
1593 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1594 u2,
1595 total_fields * (FieldInfo::field_slots + 1));
1596
1597 // The generic signature slots start after all other fields' data.
1598 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1599 int num_generic_signature = 0;
1600 for (int n = 0; n < length; n++) {
1601 // access_flags, name_index, descriptor_index, attributes_count
1602 cfs->guarantee_more(8, CHECK);
1603
1604 AccessFlags access_flags;
1605 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1606 verify_legal_field_modifiers(flags, is_interface, CHECK);
1607 access_flags.set_flags(flags);
1608
1609 const u2 name_index = cfs->get_u2_fast();
1610 check_property(valid_symbol_at(name_index),
1611 "Invalid constant pool index %u for field name in class file %s",
1612 name_index, CHECK);
1613 const Symbol* const name = cp->symbol_at(name_index);
1614 verify_legal_field_name(name, CHECK);
1615
1616 const u2 signature_index = cfs->get_u2_fast();
1617 check_property(valid_symbol_at(signature_index),
1618 "Invalid constant pool index %u for field signature in class file %s",
1619 signature_index, CHECK);
1620 const Symbol* const sig = cp->symbol_at(signature_index);
1621 verify_legal_field_signature(name, sig, CHECK);
1622
1623 u2 constantvalue_index = 0;
1624 bool is_synthetic = false;
1625 u2 generic_signature_index = 0;
1626 const bool is_static = access_flags.is_static();
1627 FieldAnnotationCollector parsed_annotations(_loader_data);
1628
1629 const u2 attributes_count = cfs->get_u2_fast();
1630 if (attributes_count > 0) {
1631 parse_field_attributes(cfs,
1632 attributes_count,
1633 is_static,
1634 signature_index,
1635 &constantvalue_index,
1636 &is_synthetic,
1637 &generic_signature_index,
1638 &parsed_annotations,
1639 CHECK);
1640
1641 if (parsed_annotations.field_annotations() != NULL) {
1642 if (_fields_annotations == NULL) {
1643 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1644 _loader_data, length, NULL,
1645 CHECK);
1646 }
1647 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1648 parsed_annotations.set_field_annotations(NULL);
1649 }
1650 if (parsed_annotations.field_type_annotations() != NULL) {
1651 if (_fields_type_annotations == NULL) {
1652 _fields_type_annotations =
1653 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1654 length,
1655 NULL,
1656 CHECK);
1657 }
1658 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1659 parsed_annotations.set_field_type_annotations(NULL);
1660 }
1661
1662 if (is_synthetic) {
1663 access_flags.set_is_synthetic();
1664 }
1665 if (generic_signature_index != 0) {
1666 access_flags.set_field_has_generic_signature();
1667 fa[generic_signature_slot] = generic_signature_index;
1668 generic_signature_slot ++;
1669 num_generic_signature ++;
1670 }
1671 }
1672
1673 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1674 field->initialize(access_flags.as_short(),
1675 name_index,
1676 signature_index,
1677 constantvalue_index);
1678 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1679
1680 // Remember how many oops we encountered and compute allocation type
1681 const FieldAllocationType atype = fac->update(is_static, type);
1682 field->set_allocation_type(atype);
1683
1684 // After field is initialized with type, we can augment it with aux info
1685 if (parsed_annotations.has_any_annotations())
1686 parsed_annotations.apply_to(field);
1687 }
1688
1689 int index = length;
1690 if (num_injected != 0) {
1691 for (int n = 0; n < num_injected; n++) {
1692 // Check for duplicates
1693 if (injected[n].may_be_java) {
1694 const Symbol* const name = injected[n].name();
1695 const Symbol* const signature = injected[n].signature();
1696 bool duplicate = false;
1697 for (int i = 0; i < length; i++) {
1698 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1699 if (name == cp->symbol_at(f->name_index()) &&
1700 signature == cp->symbol_at(f->signature_index())) {
1701 // Symbol is desclared in Java so skip this one
1702 duplicate = true;
1703 break;
1704 }
1705 }
1706 if (duplicate) {
1707 // These will be removed from the field array at the end
1708 continue;
1709 }
1710 }
1711
1712 // Injected field
1713 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1714 field->initialize(JVM_ACC_FIELD_INTERNAL,
1715 injected[n].name_index,
1716 injected[n].signature_index,
1717 0);
1718
1719 const BasicType type = FieldType::basic_type(injected[n].signature());
1720
1721 // Remember how many oops we encountered and compute allocation type
1722 const FieldAllocationType atype = fac->update(false, type);
1723 field->set_allocation_type(atype);
1724 index++;
1725 }
1726 }
1727
1728 assert(NULL == _fields, "invariant");
1729
1730 _fields =
1731 MetadataFactory::new_array<u2>(_loader_data,
1732 index * FieldInfo::field_slots + num_generic_signature,
1733 CHECK);
1734 // Sometimes injected fields already exist in the Java source so
1735 // the fields array could be too long. In that case the
1736 // fields array is trimed. Also unused slots that were reserved
1737 // for generic signature indexes are discarded.
1738 {
1739 int i = 0;
1740 for (; i < index * FieldInfo::field_slots; i++) {
1741 _fields->at_put(i, fa[i]);
1742 }
1743 for (int j = total_fields * FieldInfo::field_slots;
1744 j < generic_signature_slot; j++) {
1745 _fields->at_put(i++, fa[j]);
1746 }
1747 assert(_fields->length() == i, "");
1748 }
1749
1750 if (_need_verify && length > 1) {
1751 // Check duplicated fields
1752 ResourceMark rm(THREAD);
1753 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1754 THREAD, NameSigHash*, HASH_ROW_SIZE);
1755 initialize_hashtable(names_and_sigs);
1756 bool dup = false;
1757 const Symbol* name = NULL;
1758 const Symbol* sig = NULL;
1759 {
1760 debug_only(NoSafepointVerifier nsv;)
1761 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1762 name = fs.name();
1763 sig = fs.signature();
1764 // If no duplicates, add name/signature in hashtable names_and_sigs.
1765 if (!put_after_lookup(name, sig, names_and_sigs)) {
1766 dup = true;
1767 break;
1768 }
1769 }
1770 }
1771 if (dup) {
1772 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1773 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1774 }
1775 }
1776 }
1777
1778
1779 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1780 u4 code_length,
1781 u4 exception_table_length,
1782 TRAPS) {
1783 assert(cfs != NULL, "invariant");
1784
1785 const unsafe_u2* const exception_table_start = cfs->current();
1786 assert(exception_table_start != NULL, "null exception table");
1787
1788 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1789 // end_pc,
1790 // handler_pc,
1791 // catch_type_index
1792
1793 // Will check legal target after parsing code array in verifier.
1794 if (_need_verify) {
1795 for (unsigned int i = 0; i < exception_table_length; i++) {
1796 const u2 start_pc = cfs->get_u2_fast();
1797 const u2 end_pc = cfs->get_u2_fast();
1798 const u2 handler_pc = cfs->get_u2_fast();
1799 const u2 catch_type_index = cfs->get_u2_fast();
1800 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1801 "Illegal exception table range in class file %s",
1802 CHECK_NULL);
1803 guarantee_property(handler_pc < code_length,
1804 "Illegal exception table handler in class file %s",
1805 CHECK_NULL);
1806 if (catch_type_index != 0) {
1807 guarantee_property(valid_klass_reference_at(catch_type_index),
1808 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1809 }
1810 }
1811 } else {
1812 cfs->skip_u2_fast(exception_table_length * 4);
1813 }
1814 return exception_table_start;
1815 }
1816
1817 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1818 u4 code_length,
1819 CompressedLineNumberWriteStream**const write_stream,
1820 TRAPS) {
1821
1822 const ClassFileStream* const cfs = _stream;
1823 unsigned int num_entries = cfs->get_u2(CHECK);
1824
1825 // Each entry is a u2 start_pc, and a u2 line_number
1826 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1827
1828 // Verify line number attribute and table length
1829 check_property(
1830 code_attribute_length == sizeof(u2) + length_in_bytes,
1831 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1832
1833 cfs->guarantee_more(length_in_bytes, CHECK);
1834
1835 if ((*write_stream) == NULL) {
1836 if (length_in_bytes > fixed_buffer_size) {
1837 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1838 } else {
1839 (*write_stream) = new CompressedLineNumberWriteStream(
1840 _linenumbertable_buffer, fixed_buffer_size);
1841 }
1842 }
1843
1844 while (num_entries-- > 0) {
1845 const u2 bci = cfs->get_u2_fast(); // start_pc
1846 const u2 line = cfs->get_u2_fast(); // line_number
1847 guarantee_property(bci < code_length,
1848 "Invalid pc in LineNumberTable in class file %s", CHECK);
1849 (*write_stream)->write_pair(bci, line);
1850 }
1851 }
1852
1853
1854 class LVT_Hash : public AllStatic {
1855 public:
1856
1857 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1858 /*
1859 * 3-tuple start_bci/length/slot has to be unique key,
1860 * so the following comparison seems to be redundant:
1861 * && elem->name_cp_index == entry->_elem->name_cp_index
1862 */
1863 return (e0.start_bci == e1.start_bci &&
1864 e0.length == e1.length &&
1865 e0.name_cp_index == e1.name_cp_index &&
1866 e0.slot == e1.slot);
1867 }
1868
1869 static unsigned int hash(LocalVariableTableElement const& e0) {
1870 unsigned int raw_hash = e0.start_bci;
1871
1872 raw_hash = e0.length + raw_hash * 37;
1873 raw_hash = e0.name_cp_index + raw_hash * 37;
1874 raw_hash = e0.slot + raw_hash * 37;
1875
1876 return raw_hash;
1877 }
1878 };
1879
1880
1881 // Class file LocalVariableTable elements.
1882 class Classfile_LVT_Element {
1883 public:
1884 u2 start_bci;
1885 u2 length;
1886 u2 name_cp_index;
1887 u2 descriptor_cp_index;
1888 u2 slot;
1889 };
1890
1891 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1892 LocalVariableTableElement* const lvt) {
1893 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1894 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1895 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1896 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1897 lvt->signature_cp_index = 0;
1898 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1899 }
1900
1901 // Function is used to parse both attributes:
1902 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1903 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1904 u4 code_length,
1905 u2 max_locals,
1906 u4 code_attribute_length,
1907 u2* const localvariable_table_length,
1908 bool isLVTT,
1909 TRAPS) {
1910 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1911 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1912 const unsigned int size =
1913 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1914
1915 const ConstantPool* const cp = _cp;
1916
1917 // Verify local variable table attribute has right length
1918 if (_need_verify) {
1919 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1920 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1921 }
1922
1923 const unsafe_u2* const localvariable_table_start = cfs->current();
1924 assert(localvariable_table_start != NULL, "null local variable table");
1925 if (!_need_verify) {
1926 cfs->skip_u2_fast(size);
1927 } else {
1928 cfs->guarantee_more(size * 2, CHECK_NULL);
1929 for(int i = 0; i < (*localvariable_table_length); i++) {
1930 const u2 start_pc = cfs->get_u2_fast();
1931 const u2 length = cfs->get_u2_fast();
1932 const u2 name_index = cfs->get_u2_fast();
1933 const u2 descriptor_index = cfs->get_u2_fast();
1934 const u2 index = cfs->get_u2_fast();
1935 // Assign to a u4 to avoid overflow
1936 const u4 end_pc = (u4)start_pc + (u4)length;
1937
1938 if (start_pc >= code_length) {
1939 classfile_parse_error(
1940 "Invalid start_pc %u in %s in class file %s",
1941 start_pc, tbl_name, CHECK_NULL);
1942 }
1943 if (end_pc > code_length) {
1944 classfile_parse_error(
1945 "Invalid length %u in %s in class file %s",
1946 length, tbl_name, CHECK_NULL);
1947 }
1948 const int cp_size = cp->length();
1949 guarantee_property(valid_symbol_at(name_index),
1950 "Name index %u in %s has bad constant type in class file %s",
1951 name_index, tbl_name, CHECK_NULL);
1952 guarantee_property(valid_symbol_at(descriptor_index),
1953 "Signature index %u in %s has bad constant type in class file %s",
1954 descriptor_index, tbl_name, CHECK_NULL);
1955
1956 const Symbol* const name = cp->symbol_at(name_index);
1957 const Symbol* const sig = cp->symbol_at(descriptor_index);
1958 verify_legal_field_name(name, CHECK_NULL);
1959 u2 extra_slot = 0;
1960 if (!isLVTT) {
1961 verify_legal_field_signature(name, sig, CHECK_NULL);
1962
1963 // 4894874: check special cases for double and long local variables
1964 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1965 sig == vmSymbols::type_signature(T_LONG)) {
1966 extra_slot = 1;
1967 }
1968 }
1969 guarantee_property((index + extra_slot) < max_locals,
1970 "Invalid index %u in %s in class file %s",
1971 index, tbl_name, CHECK_NULL);
1972 }
1973 }
1974 return localvariable_table_start;
1975 }
1976
1977 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1978 u4 code_attribute_length,
1979 bool need_verify,
1980 TRAPS) {
1981 assert(cfs != NULL, "invariant");
1982
1983 if (0 == code_attribute_length) {
1984 return NULL;
1985 }
1986
1987 const u1* const stackmap_table_start = cfs->current();
1988 assert(stackmap_table_start != NULL, "null stackmap table");
1989
1990 // check code_attribute_length first
1991 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1992
1993 if (!need_verify && !DumpSharedSpaces) {
1994 return NULL;
1995 }
1996 return stackmap_table_start;
1997 }
1998
1999 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2000 u2* const checked_exceptions_length,
2001 u4 method_attribute_length,
2002 TRAPS) {
2003 assert(cfs != NULL, "invariant");
2004 assert(checked_exceptions_length != NULL, "invariant");
2005
2006 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2007 *checked_exceptions_length = cfs->get_u2_fast();
2008 const unsigned int size =
2009 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2010 const unsafe_u2* const checked_exceptions_start = cfs->current();
2011 assert(checked_exceptions_start != NULL, "null checked exceptions");
2012 if (!_need_verify) {
2013 cfs->skip_u2_fast(size);
2014 } else {
2015 // Verify each value in the checked exception table
2016 u2 checked_exception;
2017 const u2 len = *checked_exceptions_length;
2018 cfs->guarantee_more(2 * len, CHECK_NULL);
2019 for (int i = 0; i < len; i++) {
2020 checked_exception = cfs->get_u2_fast();
2021 check_property(
2022 valid_klass_reference_at(checked_exception),
2023 "Exception name has bad type at constant pool %u in class file %s",
2024 checked_exception, CHECK_NULL);
2025 }
2026 }
2027 // check exceptions attribute length
2028 if (_need_verify) {
2029 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2030 sizeof(u2) * size),
2031 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2032 }
2033 return checked_exceptions_start;
2034 }
2035
2036 void ClassFileParser::throwIllegalSignature(const char* type,
2037 const Symbol* name,
2038 const Symbol* sig,
2039 TRAPS) const {
2040 assert(name != NULL, "invariant");
2041 assert(sig != NULL, "invariant");
2042
2043 ResourceMark rm(THREAD);
2044 Exceptions::fthrow(THREAD_AND_LOCATION,
2045 vmSymbols::java_lang_ClassFormatError(),
2046 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2047 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2048 }
2049
2050 AnnotationCollector::ID
2051 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2052 const Symbol* name) {
2053 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2054 // Privileged code can use all annotations. Other code silently drops some.
2055 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2056 loader_data->is_platform_class_loader_data() ||
2057 loader_data->is_unsafe_anonymous();
2058 switch (sid) {
2059 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2060 if (_location != _in_method) break; // only allow for methods
2061 if (!privileged) break; // only allow in privileged code
2062 return _method_CallerSensitive;
2063 }
2064 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2065 if (_location != _in_method) break; // only allow for methods
2066 if (!privileged) break; // only allow in privileged code
2067 return _method_ForceInline;
2068 }
2069 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2070 if (_location != _in_method) break; // only allow for methods
2071 if (!privileged) break; // only allow in privileged code
2072 return _method_DontInline;
2073 }
2074 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2075 if (_location != _in_method) break; // only allow for methods
2076 if (!privileged) break; // only allow in privileged code
2077 return _method_InjectedProfile;
2078 }
2079 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2080 if (_location != _in_method) break; // only allow for methods
2081 if (!privileged) break; // only allow in privileged code
2082 return _method_LambdaForm_Compiled;
2083 }
2084 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2085 if (_location != _in_method) break; // only allow for methods
2086 if (!privileged) break; // only allow in privileged code
2087 return _method_Hidden;
2088 }
2089 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2090 if (_location != _in_method) break; // only allow for methods
2091 if (!privileged) break; // only allow in privileged code
2092 return _method_HotSpotIntrinsicCandidate;
2093 }
2094 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2095 if (_location != _in_field) break; // only allow for fields
2096 if (!privileged) break; // only allow in privileged code
2097 return _field_Stable;
2098 }
2099 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2100 if (_location != _in_field && _location != _in_class) {
2101 break; // only allow for fields and classes
2102 }
2103 if (!EnableContended || (RestrictContended && !privileged)) {
2104 break; // honor privileges
2105 }
2106 return _jdk_internal_vm_annotation_Contended;
2107 }
2108 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2109 if (_location != _in_method) break; // only allow for methods
2110 if (RestrictReservedStack && !privileged) break; // honor privileges
2111 return _jdk_internal_vm_annotation_ReservedStackAccess;
2112 }
2113 default: {
2114 break;
2115 }
2116 }
2117 return AnnotationCollector::_unknown;
2118 }
2119
2120 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2121 if (is_contended())
2122 f->set_contended_group(contended_group());
2123 if (is_stable())
2124 f->set_stable(true);
2125 }
2126
2127 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2128 // If there's an error deallocate metadata for field annotations
2129 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2130 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2131 }
2132
2133 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2134 if (has_annotation(_method_CallerSensitive))
2135 m->set_caller_sensitive(true);
2136 if (has_annotation(_method_ForceInline))
2137 m->set_force_inline(true);
2138 if (has_annotation(_method_DontInline))
2139 m->set_dont_inline(true);
2140 if (has_annotation(_method_InjectedProfile))
2141 m->set_has_injected_profile(true);
2142 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2143 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2144 if (has_annotation(_method_Hidden))
2145 m->set_hidden(true);
2146 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2147 m->set_intrinsic_candidate(true);
2148 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2149 m->set_has_reserved_stack_access(true);
2150 }
2151
2152 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2153 assert(ik != NULL, "invariant");
2154 ik->set_is_contended(is_contended());
2155 }
2156
2157 #define MAX_ARGS_SIZE 255
2158 #define MAX_CODE_SIZE 65535
2159 #define INITIAL_MAX_LVT_NUMBER 256
2160
2161 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2162 *
2163 * Rules for LVT's and LVTT's are:
2164 * - There can be any number of LVT's and LVTT's.
2165 * - If there are n LVT's, it is the same as if there was just
2166 * one LVT containing all the entries from the n LVT's.
2167 * - There may be no more than one LVT entry per local variable.
2168 * Two LVT entries are 'equal' if these fields are the same:
2169 * start_pc, length, name, slot
2170 * - There may be no more than one LVTT entry per each LVT entry.
2171 * Each LVTT entry has to match some LVT entry.
2172 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2173 */
2174 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2175 int lvt_cnt,
2176 u2* const localvariable_table_length,
2177 const unsafe_u2** const localvariable_table_start,
2178 int lvtt_cnt,
2179 u2* const localvariable_type_table_length,
2180 const unsafe_u2** const localvariable_type_table_start,
2181 TRAPS) {
2182
2183 ResourceMark rm(THREAD);
2184
2185 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2186 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2187
2188 LVT_HashTable* const table = new LVT_HashTable();
2189
2190 // To fill LocalVariableTable in
2191 const Classfile_LVT_Element* cf_lvt;
2192 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2193
2194 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2195 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2196 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2197 copy_lvt_element(&cf_lvt[idx], lvt);
2198 // If no duplicates, add LVT elem in hashtable.
2199 if (table->put(*lvt, lvt) == false
2200 && _need_verify
2201 && _major_version >= JAVA_1_5_VERSION) {
2202 classfile_parse_error("Duplicated LocalVariableTable attribute "
2203 "entry for '%s' in class file %s",
2204 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2205 CHECK);
2206 }
2207 }
2208 }
2209
2210 // To merge LocalVariableTable and LocalVariableTypeTable
2211 const Classfile_LVT_Element* cf_lvtt;
2212 LocalVariableTableElement lvtt_elem;
2213
2214 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2215 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2216 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2217 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2218 LocalVariableTableElement** entry = table->get(lvtt_elem);
2219 if (entry == NULL) {
2220 if (_need_verify) {
2221 classfile_parse_error("LVTT entry for '%s' in class file %s "
2222 "does not match any LVT entry",
2223 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2224 CHECK);
2225 }
2226 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2227 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2228 "entry for '%s' in class file %s",
2229 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2230 CHECK);
2231 } else {
2232 // to add generic signatures into LocalVariableTable
2233 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2234 }
2235 }
2236 }
2237 }
2238
2239
2240 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2241 const u1* runtime_visible_annotations,
2242 int runtime_visible_annotations_length,
2243 const u1* runtime_invisible_annotations,
2244 int runtime_invisible_annotations_length,
2245 const u1* runtime_visible_parameter_annotations,
2246 int runtime_visible_parameter_annotations_length,
2247 const u1* runtime_invisible_parameter_annotations,
2248 int runtime_invisible_parameter_annotations_length,
2249 const u1* runtime_visible_type_annotations,
2250 int runtime_visible_type_annotations_length,
2251 const u1* runtime_invisible_type_annotations,
2252 int runtime_invisible_type_annotations_length,
2253 const u1* annotation_default,
2254 int annotation_default_length,
2255 TRAPS) {
2256
2257 AnnotationArray* a;
2258
2259 if (runtime_visible_annotations_length +
2260 runtime_invisible_annotations_length > 0) {
2261 a = assemble_annotations(runtime_visible_annotations,
2262 runtime_visible_annotations_length,
2263 runtime_invisible_annotations,
2264 runtime_invisible_annotations_length,
2265 CHECK);
2266 cm->set_method_annotations(a);
2267 }
2268
2269 if (runtime_visible_parameter_annotations_length +
2270 runtime_invisible_parameter_annotations_length > 0) {
2271 a = assemble_annotations(runtime_visible_parameter_annotations,
2272 runtime_visible_parameter_annotations_length,
2273 runtime_invisible_parameter_annotations,
2274 runtime_invisible_parameter_annotations_length,
2275 CHECK);
2276 cm->set_parameter_annotations(a);
2277 }
2278
2279 if (annotation_default_length > 0) {
2280 a = assemble_annotations(annotation_default,
2281 annotation_default_length,
2282 NULL,
2283 0,
2284 CHECK);
2285 cm->set_default_annotations(a);
2286 }
2287
2288 if (runtime_visible_type_annotations_length +
2289 runtime_invisible_type_annotations_length > 0) {
2290 a = assemble_annotations(runtime_visible_type_annotations,
2291 runtime_visible_type_annotations_length,
2292 runtime_invisible_type_annotations,
2293 runtime_invisible_type_annotations_length,
2294 CHECK);
2295 cm->set_type_annotations(a);
2296 }
2297 }
2298
2299
2300 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2301 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2302 // Method* to save footprint, so we only know the size of the resulting Method* when the
2303 // entire method attribute is parsed.
2304 //
2305 // The promoted_flags parameter is used to pass relevant access_flags
2306 // from the method back up to the containing klass. These flag values
2307 // are added to klass's access_flags.
2308
2309 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2310 bool is_interface,
2311 const ConstantPool* cp,
2312 AccessFlags* const promoted_flags,
2313 TRAPS) {
2314 assert(cfs != NULL, "invariant");
2315 assert(cp != NULL, "invariant");
2316 assert(promoted_flags != NULL, "invariant");
2317
2318 ResourceMark rm(THREAD);
2319 // Parse fixed parts:
2320 // access_flags, name_index, descriptor_index, attributes_count
2321 cfs->guarantee_more(8, CHECK_NULL);
2322
2323 int flags = cfs->get_u2_fast();
2324 const u2 name_index = cfs->get_u2_fast();
2325 const int cp_size = cp->length();
2326 check_property(
2327 valid_symbol_at(name_index),
2328 "Illegal constant pool index %u for method name in class file %s",
2329 name_index, CHECK_NULL);
2330 const Symbol* const name = cp->symbol_at(name_index);
2331 verify_legal_method_name(name, CHECK_NULL);
2332
2333 const u2 signature_index = cfs->get_u2_fast();
2334 guarantee_property(
2335 valid_symbol_at(signature_index),
2336 "Illegal constant pool index %u for method signature in class file %s",
2337 signature_index, CHECK_NULL);
2338 const Symbol* const signature = cp->symbol_at(signature_index);
2339
2340 if (name == vmSymbols::class_initializer_name()) {
2341 // We ignore the other access flags for a valid class initializer.
2342 // (JVM Spec 2nd ed., chapter 4.6)
2343 if (_major_version < 51) { // backward compatibility
2344 flags = JVM_ACC_STATIC;
2345 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2346 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2347 } else {
2348 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2349 }
2350 } else {
2351 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2352 }
2353
2354 if (name == vmSymbols::object_initializer_name() && is_interface) {
2355 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2356 }
2357
2358 int args_size = -1; // only used when _need_verify is true
2359 if (_need_verify) {
2360 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2361 verify_legal_method_signature(name, signature, CHECK_NULL);
2362 if (args_size > MAX_ARGS_SIZE) {
2363 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2364 }
2365 }
2366
2367 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2368
2369 // Default values for code and exceptions attribute elements
2370 u2 max_stack = 0;
2371 u2 max_locals = 0;
2372 u4 code_length = 0;
2373 const u1* code_start = 0;
2374 u2 exception_table_length = 0;
2375 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2376 Array<int>* exception_handlers = Universe::the_empty_int_array();
2377 u2 checked_exceptions_length = 0;
2378 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2379 CompressedLineNumberWriteStream* linenumber_table = NULL;
2380 int linenumber_table_length = 0;
2381 int total_lvt_length = 0;
2382 u2 lvt_cnt = 0;
2383 u2 lvtt_cnt = 0;
2384 bool lvt_allocated = false;
2385 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2386 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2387 u2* localvariable_table_length = NULL;
2388 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2389 u2* localvariable_type_table_length = NULL;
2390 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2391 int method_parameters_length = -1;
2392 const u1* method_parameters_data = NULL;
2393 bool method_parameters_seen = false;
2394 bool parsed_code_attribute = false;
2395 bool parsed_checked_exceptions_attribute = false;
2396 bool parsed_stackmap_attribute = false;
2397 // stackmap attribute - JDK1.5
2398 const u1* stackmap_data = NULL;
2399 int stackmap_data_length = 0;
2400 u2 generic_signature_index = 0;
2401 MethodAnnotationCollector parsed_annotations;
2402 const u1* runtime_visible_annotations = NULL;
2403 int runtime_visible_annotations_length = 0;
2404 const u1* runtime_invisible_annotations = NULL;
2405 int runtime_invisible_annotations_length = 0;
2406 const u1* runtime_visible_parameter_annotations = NULL;
2407 int runtime_visible_parameter_annotations_length = 0;
2408 const u1* runtime_invisible_parameter_annotations = NULL;
2409 int runtime_invisible_parameter_annotations_length = 0;
2410 const u1* runtime_visible_type_annotations = NULL;
2411 int runtime_visible_type_annotations_length = 0;
2412 const u1* runtime_invisible_type_annotations = NULL;
2413 int runtime_invisible_type_annotations_length = 0;
2414 bool runtime_invisible_annotations_exists = false;
2415 bool runtime_invisible_type_annotations_exists = false;
2416 bool runtime_invisible_parameter_annotations_exists = false;
2417 const u1* annotation_default = NULL;
2418 int annotation_default_length = 0;
2419
2420 // Parse code and exceptions attribute
2421 u2 method_attributes_count = cfs->get_u2_fast();
2422 while (method_attributes_count--) {
2423 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2424 const u2 method_attribute_name_index = cfs->get_u2_fast();
2425 const u4 method_attribute_length = cfs->get_u4_fast();
2426 check_property(
2427 valid_symbol_at(method_attribute_name_index),
2428 "Invalid method attribute name index %u in class file %s",
2429 method_attribute_name_index, CHECK_NULL);
2430
2431 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2432 if (method_attribute_name == vmSymbols::tag_code()) {
2433 // Parse Code attribute
2434 if (_need_verify) {
2435 guarantee_property(
2436 !access_flags.is_native() && !access_flags.is_abstract(),
2437 "Code attribute in native or abstract methods in class file %s",
2438 CHECK_NULL);
2439 }
2440 if (parsed_code_attribute) {
2441 classfile_parse_error("Multiple Code attributes in class file %s",
2442 CHECK_NULL);
2443 }
2444 parsed_code_attribute = true;
2445
2446 // Stack size, locals size, and code size
2447 if (_major_version == 45 && _minor_version <= 2) {
2448 cfs->guarantee_more(4, CHECK_NULL);
2449 max_stack = cfs->get_u1_fast();
2450 max_locals = cfs->get_u1_fast();
2451 code_length = cfs->get_u2_fast();
2452 } else {
2453 cfs->guarantee_more(8, CHECK_NULL);
2454 max_stack = cfs->get_u2_fast();
2455 max_locals = cfs->get_u2_fast();
2456 code_length = cfs->get_u4_fast();
2457 }
2458 if (_need_verify) {
2459 guarantee_property(args_size <= max_locals,
2460 "Arguments can't fit into locals in class file %s",
2461 CHECK_NULL);
2462 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2463 "Invalid method Code length %u in class file %s",
2464 code_length, CHECK_NULL);
2465 }
2466 // Code pointer
2467 code_start = cfs->current();
2468 assert(code_start != NULL, "null code start");
2469 cfs->guarantee_more(code_length, CHECK_NULL);
2470 cfs->skip_u1_fast(code_length);
2471
2472 // Exception handler table
2473 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2474 exception_table_length = cfs->get_u2_fast();
2475 if (exception_table_length > 0) {
2476 exception_table_start = parse_exception_table(cfs,
2477 code_length,
2478 exception_table_length,
2479 CHECK_NULL);
2480 }
2481
2482 // Parse additional attributes in code attribute
2483 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2484 u2 code_attributes_count = cfs->get_u2_fast();
2485
2486 unsigned int calculated_attribute_length = 0;
2487
2488 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2489 calculated_attribute_length =
2490 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2491 } else {
2492 // max_stack, locals and length are smaller in pre-version 45.2 classes
2493 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2494 }
2495 calculated_attribute_length +=
2496 code_length +
2497 sizeof(exception_table_length) +
2498 sizeof(code_attributes_count) +
2499 exception_table_length *
2500 ( sizeof(u2) + // start_pc
2501 sizeof(u2) + // end_pc
2502 sizeof(u2) + // handler_pc
2503 sizeof(u2) ); // catch_type_index
2504
2505 while (code_attributes_count--) {
2506 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2507 const u2 code_attribute_name_index = cfs->get_u2_fast();
2508 const u4 code_attribute_length = cfs->get_u4_fast();
2509 calculated_attribute_length += code_attribute_length +
2510 sizeof(code_attribute_name_index) +
2511 sizeof(code_attribute_length);
2512 check_property(valid_symbol_at(code_attribute_name_index),
2513 "Invalid code attribute name index %u in class file %s",
2514 code_attribute_name_index,
2515 CHECK_NULL);
2516 if (LoadLineNumberTables &&
2517 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2518 // Parse and compress line number table
2519 parse_linenumber_table(code_attribute_length,
2520 code_length,
2521 &linenumber_table,
2522 CHECK_NULL);
2523
2524 } else if (LoadLocalVariableTables &&
2525 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2526 // Parse local variable table
2527 if (!lvt_allocated) {
2528 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2529 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2530 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2531 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2532 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2533 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2534 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2535 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2536 lvt_allocated = true;
2537 }
2538 if (lvt_cnt == max_lvt_cnt) {
2539 max_lvt_cnt <<= 1;
2540 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2541 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2542 }
2543 localvariable_table_start[lvt_cnt] =
2544 parse_localvariable_table(cfs,
2545 code_length,
2546 max_locals,
2547 code_attribute_length,
2548 &localvariable_table_length[lvt_cnt],
2549 false, // is not LVTT
2550 CHECK_NULL);
2551 total_lvt_length += localvariable_table_length[lvt_cnt];
2552 lvt_cnt++;
2553 } else if (LoadLocalVariableTypeTables &&
2554 _major_version >= JAVA_1_5_VERSION &&
2555 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2556 if (!lvt_allocated) {
2557 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2558 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2559 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2560 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2561 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2562 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2563 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2564 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2565 lvt_allocated = true;
2566 }
2567 // Parse local variable type table
2568 if (lvtt_cnt == max_lvtt_cnt) {
2569 max_lvtt_cnt <<= 1;
2570 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2571 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2572 }
2573 localvariable_type_table_start[lvtt_cnt] =
2574 parse_localvariable_table(cfs,
2575 code_length,
2576 max_locals,
2577 code_attribute_length,
2578 &localvariable_type_table_length[lvtt_cnt],
2579 true, // is LVTT
2580 CHECK_NULL);
2581 lvtt_cnt++;
2582 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2583 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2584 // Stack map is only needed by the new verifier in JDK1.5.
2585 if (parsed_stackmap_attribute) {
2586 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2587 }
2588 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2589 stackmap_data_length = code_attribute_length;
2590 parsed_stackmap_attribute = true;
2591 } else {
2592 // Skip unknown attributes
2593 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2594 }
2595 }
2596 // check method attribute length
2597 if (_need_verify) {
2598 guarantee_property(method_attribute_length == calculated_attribute_length,
2599 "Code segment has wrong length in class file %s",
2600 CHECK_NULL);
2601 }
2602 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2603 // Parse Exceptions attribute
2604 if (parsed_checked_exceptions_attribute) {
2605 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2606 CHECK_NULL);
2607 }
2608 parsed_checked_exceptions_attribute = true;
2609 checked_exceptions_start =
2610 parse_checked_exceptions(cfs,
2611 &checked_exceptions_length,
2612 method_attribute_length,
2613 CHECK_NULL);
2614 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2615 // reject multiple method parameters
2616 if (method_parameters_seen) {
2617 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2618 CHECK_NULL);
2619 }
2620 method_parameters_seen = true;
2621 method_parameters_length = cfs->get_u1_fast();
2622 const u2 real_length = (method_parameters_length * 4u) + 1u;
2623 if (method_attribute_length != real_length) {
2624 classfile_parse_error(
2625 "Invalid MethodParameters method attribute length %u in class file",
2626 method_attribute_length, CHECK_NULL);
2627 }
2628 method_parameters_data = cfs->current();
2629 cfs->skip_u2_fast(method_parameters_length);
2630 cfs->skip_u2_fast(method_parameters_length);
2631 // ignore this attribute if it cannot be reflected
2632 if (!SystemDictionary::Parameter_klass_loaded())
2633 method_parameters_length = -1;
2634 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2635 if (method_attribute_length != 0) {
2636 classfile_parse_error(
2637 "Invalid Synthetic method attribute length %u in class file %s",
2638 method_attribute_length, CHECK_NULL);
2639 }
2640 // Should we check that there hasn't already been a synthetic attribute?
2641 access_flags.set_is_synthetic();
2642 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2643 if (method_attribute_length != 0) {
2644 classfile_parse_error(
2645 "Invalid Deprecated method attribute length %u in class file %s",
2646 method_attribute_length, CHECK_NULL);
2647 }
2648 } else if (_major_version >= JAVA_1_5_VERSION) {
2649 if (method_attribute_name == vmSymbols::tag_signature()) {
2650 if (generic_signature_index != 0) {
2651 classfile_parse_error(
2652 "Multiple Signature attributes for method in class file %s",
2653 CHECK_NULL);
2654 }
2655 if (method_attribute_length != 2) {
2656 classfile_parse_error(
2657 "Invalid Signature attribute length %u in class file %s",
2658 method_attribute_length, CHECK_NULL);
2659 }
2660 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2661 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2662 if (runtime_visible_annotations != NULL) {
2663 classfile_parse_error(
2664 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2665 CHECK_NULL);
2666 }
2667 runtime_visible_annotations_length = method_attribute_length;
2668 runtime_visible_annotations = cfs->current();
2669 assert(runtime_visible_annotations != NULL, "null visible annotations");
2670 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2671 parse_annotations(cp,
2672 runtime_visible_annotations,
2673 runtime_visible_annotations_length,
2674 &parsed_annotations,
2675 _loader_data,
2676 CHECK_NULL);
2677 cfs->skip_u1_fast(runtime_visible_annotations_length);
2678 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2679 if (runtime_invisible_annotations_exists) {
2680 classfile_parse_error(
2681 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2682 CHECK_NULL);
2683 }
2684 runtime_invisible_annotations_exists = true;
2685 if (PreserveAllAnnotations) {
2686 runtime_invisible_annotations_length = method_attribute_length;
2687 runtime_invisible_annotations = cfs->current();
2688 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2689 }
2690 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2691 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2692 if (runtime_visible_parameter_annotations != NULL) {
2693 classfile_parse_error(
2694 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2695 CHECK_NULL);
2696 }
2697 runtime_visible_parameter_annotations_length = method_attribute_length;
2698 runtime_visible_parameter_annotations = cfs->current();
2699 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2700 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2701 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2702 if (runtime_invisible_parameter_annotations_exists) {
2703 classfile_parse_error(
2704 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2705 CHECK_NULL);
2706 }
2707 runtime_invisible_parameter_annotations_exists = true;
2708 if (PreserveAllAnnotations) {
2709 runtime_invisible_parameter_annotations_length = method_attribute_length;
2710 runtime_invisible_parameter_annotations = cfs->current();
2711 assert(runtime_invisible_parameter_annotations != NULL,
2712 "null invisible parameter annotations");
2713 }
2714 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2715 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2716 if (annotation_default != NULL) {
2717 classfile_parse_error(
2718 "Multiple AnnotationDefault attributes for method in class file %s",
2719 CHECK_NULL);
2720 }
2721 annotation_default_length = method_attribute_length;
2722 annotation_default = cfs->current();
2723 assert(annotation_default != NULL, "null annotation default");
2724 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2725 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2726 if (runtime_visible_type_annotations != NULL) {
2727 classfile_parse_error(
2728 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2729 CHECK_NULL);
2730 }
2731 runtime_visible_type_annotations_length = method_attribute_length;
2732 runtime_visible_type_annotations = cfs->current();
2733 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2734 // No need for the VM to parse Type annotations
2735 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2736 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2737 if (runtime_invisible_type_annotations_exists) {
2738 classfile_parse_error(
2739 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2740 CHECK_NULL);
2741 } else {
2742 runtime_invisible_type_annotations_exists = true;
2743 }
2744 if (PreserveAllAnnotations) {
2745 runtime_invisible_type_annotations_length = method_attribute_length;
2746 runtime_invisible_type_annotations = cfs->current();
2747 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2748 }
2749 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2750 } else {
2751 // Skip unknown attributes
2752 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2753 }
2754 } else {
2755 // Skip unknown attributes
2756 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2757 }
2758 }
2759
2760 if (linenumber_table != NULL) {
2761 linenumber_table->write_terminator();
2762 linenumber_table_length = linenumber_table->position();
2763 }
2764
2765 // Make sure there's at least one Code attribute in non-native/non-abstract method
2766 if (_need_verify) {
2767 guarantee_property(access_flags.is_native() ||
2768 access_flags.is_abstract() ||
2769 parsed_code_attribute,
2770 "Absent Code attribute in method that is not native or abstract in class file %s",
2771 CHECK_NULL);
2772 }
2773
2774 // All sizing information for a Method* is finally available, now create it
2775 InlineTableSizes sizes(
2776 total_lvt_length,
2777 linenumber_table_length,
2778 exception_table_length,
2779 checked_exceptions_length,
2780 method_parameters_length,
2781 generic_signature_index,
2782 runtime_visible_annotations_length +
2783 runtime_invisible_annotations_length,
2784 runtime_visible_parameter_annotations_length +
2785 runtime_invisible_parameter_annotations_length,
2786 runtime_visible_type_annotations_length +
2787 runtime_invisible_type_annotations_length,
2788 annotation_default_length,
2789 0);
2790
2791 Method* const m = Method::allocate(_loader_data,
2792 code_length,
2793 access_flags,
2794 &sizes,
2795 ConstMethod::NORMAL,
2796 CHECK_NULL);
2797
2798 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2799
2800 // Fill in information from fixed part (access_flags already set)
2801 m->set_constants(_cp);
2802 m->set_name_index(name_index);
2803 m->set_signature_index(signature_index);
2804
2805 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2806 m->constMethod()->set_result_type(rtf.type());
2807
2808 if (args_size >= 0) {
2809 m->set_size_of_parameters(args_size);
2810 } else {
2811 m->compute_size_of_parameters(THREAD);
2812 }
2813 #ifdef ASSERT
2814 if (args_size >= 0) {
2815 m->compute_size_of_parameters(THREAD);
2816 assert(args_size == m->size_of_parameters(), "");
2817 }
2818 #endif
2819
2820 // Fill in code attribute information
2821 m->set_max_stack(max_stack);
2822 m->set_max_locals(max_locals);
2823 if (stackmap_data != NULL) {
2824 m->constMethod()->copy_stackmap_data(_loader_data,
2825 (u1*)stackmap_data,
2826 stackmap_data_length,
2827 CHECK_NULL);
2828 }
2829
2830 // Copy byte codes
2831 m->set_code((u1*)code_start);
2832
2833 // Copy line number table
2834 if (linenumber_table != NULL) {
2835 memcpy(m->compressed_linenumber_table(),
2836 linenumber_table->buffer(),
2837 linenumber_table_length);
2838 }
2839
2840 // Copy exception table
2841 if (exception_table_length > 0) {
2842 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2843 m->exception_table_start(),
2844 exception_table_length * sizeof(ExceptionTableElement),
2845 sizeof(u2));
2846 }
2847
2848 // Copy method parameters
2849 if (method_parameters_length > 0) {
2850 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2851 for (int i = 0; i < method_parameters_length; i++) {
2852 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2853 method_parameters_data += 2;
2854 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2855 method_parameters_data += 2;
2856 }
2857 }
2858
2859 // Copy checked exceptions
2860 if (checked_exceptions_length > 0) {
2861 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2862 m->checked_exceptions_start(),
2863 checked_exceptions_length * sizeof(CheckedExceptionElement),
2864 sizeof(u2));
2865 }
2866
2867 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2868 if (total_lvt_length > 0) {
2869 promoted_flags->set_has_localvariable_table();
2870 copy_localvariable_table(m->constMethod(),
2871 lvt_cnt,
2872 localvariable_table_length,
2873 localvariable_table_start,
2874 lvtt_cnt,
2875 localvariable_type_table_length,
2876 localvariable_type_table_start,
2877 CHECK_NULL);
2878 }
2879
2880 if (parsed_annotations.has_any_annotations())
2881 parsed_annotations.apply_to(m);
2882
2883 // Copy annotations
2884 copy_method_annotations(m->constMethod(),
2885 runtime_visible_annotations,
2886 runtime_visible_annotations_length,
2887 runtime_invisible_annotations,
2888 runtime_invisible_annotations_length,
2889 runtime_visible_parameter_annotations,
2890 runtime_visible_parameter_annotations_length,
2891 runtime_invisible_parameter_annotations,
2892 runtime_invisible_parameter_annotations_length,
2893 runtime_visible_type_annotations,
2894 runtime_visible_type_annotations_length,
2895 runtime_invisible_type_annotations,
2896 runtime_invisible_type_annotations_length,
2897 annotation_default,
2898 annotation_default_length,
2899 CHECK_NULL);
2900
2901 if (name == vmSymbols::finalize_method_name() &&
2902 signature == vmSymbols::void_method_signature()) {
2903 if (m->is_empty_method()) {
2904 _has_empty_finalizer = true;
2905 } else {
2906 _has_finalizer = true;
2907 }
2908 }
2909 if (name == vmSymbols::object_initializer_name() &&
2910 signature == vmSymbols::void_method_signature() &&
2911 m->is_vanilla_constructor()) {
2912 _has_vanilla_constructor = true;
2913 }
2914
2915 NOT_PRODUCT(m->verify());
2916 return m;
2917 }
2918
2919
2920 // The promoted_flags parameter is used to pass relevant access_flags
2921 // from the methods back up to the containing klass. These flag values
2922 // are added to klass's access_flags.
2923 // Side-effects: populates the _methods field in the parser
2924 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2925 bool is_interface,
2926 AccessFlags* promoted_flags,
2927 bool* has_final_method,
2928 bool* declares_nonstatic_concrete_methods,
2929 TRAPS) {
2930 assert(cfs != NULL, "invariant");
2931 assert(promoted_flags != NULL, "invariant");
2932 assert(has_final_method != NULL, "invariant");
2933 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2934
2935 assert(NULL == _methods, "invariant");
2936
2937 cfs->guarantee_more(2, CHECK); // length
2938 const u2 length = cfs->get_u2_fast();
2939 if (length == 0) {
2940 _methods = Universe::the_empty_method_array();
2941 } else {
2942 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2943 length,
2944 NULL,
2945 CHECK);
2946
2947 for (int index = 0; index < length; index++) {
2948 Method* method = parse_method(cfs,
2949 is_interface,
2950 _cp,
2951 promoted_flags,
2952 CHECK);
2953
2954 if (method->is_final()) {
2955 *has_final_method = true;
2956 }
2957 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2958 // used for interface initialization, and default method inheritance analysis
2959 if (is_interface && !(*declares_nonstatic_concrete_methods)
2960 && !method->is_abstract() && !method->is_static()) {
2961 *declares_nonstatic_concrete_methods = true;
2962 }
2963 _methods->at_put(index, method);
2964 }
2965
2966 if (_need_verify && length > 1) {
2967 // Check duplicated methods
2968 ResourceMark rm(THREAD);
2969 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2970 THREAD, NameSigHash*, HASH_ROW_SIZE);
2971 initialize_hashtable(names_and_sigs);
2972 bool dup = false;
2973 const Symbol* name = NULL;
2974 const Symbol* sig = NULL;
2975 {
2976 debug_only(NoSafepointVerifier nsv;)
2977 for (int i = 0; i < length; i++) {
2978 const Method* const m = _methods->at(i);
2979 name = m->name();
2980 sig = m->signature();
2981 // If no duplicates, add name/signature in hashtable names_and_sigs.
2982 if (!put_after_lookup(name, sig, names_and_sigs)) {
2983 dup = true;
2984 break;
2985 }
2986 }
2987 }
2988 if (dup) {
2989 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2990 name->as_C_string(), sig->as_klass_external_name(), CHECK);
2991 }
2992 }
2993 }
2994 }
2995
2996 static const intArray* sort_methods(Array<Method*>* methods) {
2997 const int length = methods->length();
2998 // If JVMTI original method ordering or sharing is enabled we have to
2999 // remember the original class file ordering.
3000 // We temporarily use the vtable_index field in the Method* to store the
3001 // class file index, so we can read in after calling qsort.
3002 // Put the method ordering in the shared archive.
3003 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3004 for (int index = 0; index < length; index++) {
3005 Method* const m = methods->at(index);
3006 assert(!m->valid_vtable_index(), "vtable index should not be set");
3007 m->set_vtable_index(index);
3008 }
3009 }
3010 // Sort method array by ascending method name (for faster lookups & vtable construction)
3011 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3012 Method::sort_methods(methods);
3013
3014 intArray* method_ordering = NULL;
3015 // If JVMTI original method ordering or sharing is enabled construct int
3016 // array remembering the original ordering
3017 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3018 method_ordering = new intArray(length, length, -1);
3019 for (int index = 0; index < length; index++) {
3020 Method* const m = methods->at(index);
3021 const int old_index = m->vtable_index();
3022 assert(old_index >= 0 && old_index < length, "invalid method index");
3023 method_ordering->at_put(index, old_index);
3024 m->set_vtable_index(Method::invalid_vtable_index);
3025 }
3026 }
3027 return method_ordering;
3028 }
3029
3030 // Parse generic_signature attribute for methods and fields
3031 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3032 TRAPS) {
3033 assert(cfs != NULL, "invariant");
3034
3035 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3036 const u2 generic_signature_index = cfs->get_u2_fast();
3037 check_property(
3038 valid_symbol_at(generic_signature_index),
3039 "Invalid Signature attribute at constant pool index %u in class file %s",
3040 generic_signature_index, CHECK_0);
3041 return generic_signature_index;
3042 }
3043
3044 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3045 TRAPS) {
3046
3047 assert(cfs != NULL, "invariant");
3048
3049 cfs->guarantee_more(2, CHECK); // sourcefile_index
3050 const u2 sourcefile_index = cfs->get_u2_fast();
3051 check_property(
3052 valid_symbol_at(sourcefile_index),
3053 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3054 sourcefile_index, CHECK);
3055 set_class_sourcefile_index(sourcefile_index);
3056 }
3057
3058 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3059 int length,
3060 TRAPS) {
3061 assert(cfs != NULL, "invariant");
3062
3063 const u1* const sde_buffer = cfs->current();
3064 assert(sde_buffer != NULL, "null sde buffer");
3065
3066 // Don't bother storing it if there is no way to retrieve it
3067 if (JvmtiExport::can_get_source_debug_extension()) {
3068 assert((length+1) > length, "Overflow checking");
3069 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3070 for (int i = 0; i < length; i++) {
3071 sde[i] = sde_buffer[i];
3072 }
3073 sde[length] = '\0';
3074 set_class_sde_buffer((const char*)sde, length);
3075 }
3076 // Got utf8 string, set stream position forward
3077 cfs->skip_u1(length, CHECK);
3078 }
3079
3080
3081 // Inner classes can be static, private or protected (classic VM does this)
3082 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3083 JVM_ACC_PRIVATE | \
3084 JVM_ACC_PROTECTED | \
3085 JVM_ACC_STATIC \
3086 )
3087
3088 // Return number of classes in the inner classes attribute table
3089 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3090 const u1* const inner_classes_attribute_start,
3091 bool parsed_enclosingmethod_attribute,
3092 u2 enclosing_method_class_index,
3093 u2 enclosing_method_method_index,
3094 TRAPS) {
3095 const u1* const current_mark = cfs->current();
3096 u2 length = 0;
3097 if (inner_classes_attribute_start != NULL) {
3098 cfs->set_current(inner_classes_attribute_start);
3099 cfs->guarantee_more(2, CHECK_0); // length
3100 length = cfs->get_u2_fast();
3101 }
3102
3103 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3104 // method data:
3105 // [inner_class_info_index,
3106 // outer_class_info_index,
3107 // inner_name_index,
3108 // inner_class_access_flags,
3109 // ...
3110 // enclosing_method_class_index,
3111 // enclosing_method_method_index]
3112 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3113 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3114 _inner_classes = inner_classes;
3115
3116 int index = 0;
3117 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3118 for (int n = 0; n < length; n++) {
3119 // Inner class index
3120 const u2 inner_class_info_index = cfs->get_u2_fast();
3121 check_property(
3122 valid_klass_reference_at(inner_class_info_index),
3123 "inner_class_info_index %u has bad constant type in class file %s",
3124 inner_class_info_index, CHECK_0);
3125 // Outer class index
3126 const u2 outer_class_info_index = cfs->get_u2_fast();
3127 check_property(
3128 outer_class_info_index == 0 ||
3129 valid_klass_reference_at(outer_class_info_index),
3130 "outer_class_info_index %u has bad constant type in class file %s",
3131 outer_class_info_index, CHECK_0);
3132 // Inner class name
3133 const u2 inner_name_index = cfs->get_u2_fast();
3134 check_property(
3135 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3136 "inner_name_index %u has bad constant type in class file %s",
3137 inner_name_index, CHECK_0);
3138 if (_need_verify) {
3139 guarantee_property(inner_class_info_index != outer_class_info_index,
3140 "Class is both outer and inner class in class file %s", CHECK_0);
3141 }
3142 // Access flags
3143 jint flags;
3144 // JVM_ACC_MODULE is defined in JDK-9 and later.
3145 if (_major_version >= JAVA_9_VERSION) {
3146 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3147 } else {
3148 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3149 }
3150 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3151 // Set abstract bit for old class files for backward compatibility
3152 flags |= JVM_ACC_ABSTRACT;
3153 }
3154 verify_legal_class_modifiers(flags, CHECK_0);
3155 AccessFlags inner_access_flags(flags);
3156
3157 inner_classes->at_put(index++, inner_class_info_index);
3158 inner_classes->at_put(index++, outer_class_info_index);
3159 inner_classes->at_put(index++, inner_name_index);
3160 inner_classes->at_put(index++, inner_access_flags.as_short());
3161 }
3162
3163 // 4347400: make sure there's no duplicate entry in the classes array
3164 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3165 for(int i = 0; i < length * 4; i += 4) {
3166 for(int j = i + 4; j < length * 4; j += 4) {
3167 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3168 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3169 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3170 inner_classes->at(i+3) != inner_classes->at(j+3)),
3171 "Duplicate entry in InnerClasses in class file %s",
3172 CHECK_0);
3173 }
3174 }
3175 }
3176
3177 // Set EnclosingMethod class and method indexes.
3178 if (parsed_enclosingmethod_attribute) {
3179 inner_classes->at_put(index++, enclosing_method_class_index);
3180 inner_classes->at_put(index++, enclosing_method_method_index);
3181 }
3182 assert(index == size, "wrong size");
3183
3184 // Restore buffer's current position.
3185 cfs->set_current(current_mark);
3186
3187 return length;
3188 }
3189
3190 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3191 const u1* const nest_members_attribute_start,
3192 TRAPS) {
3193 const u1* const current_mark = cfs->current();
3194 u2 length = 0;
3195 if (nest_members_attribute_start != NULL) {
3196 cfs->set_current(nest_members_attribute_start);
3197 cfs->guarantee_more(2, CHECK_0); // length
3198 length = cfs->get_u2_fast();
3199 }
3200 const int size = length;
3201 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3202 _nest_members = nest_members;
3203
3204 int index = 0;
3205 cfs->guarantee_more(2 * length, CHECK_0);
3206 for (int n = 0; n < length; n++) {
3207 const u2 class_info_index = cfs->get_u2_fast();
3208 check_property(
3209 valid_klass_reference_at(class_info_index),
3210 "Nest member class_info_index %u has bad constant type in class file %s",
3211 class_info_index, CHECK_0);
3212 nest_members->at_put(index++, class_info_index);
3213 }
3214 assert(index == size, "wrong size");
3215
3216 // Restore buffer's current position.
3217 cfs->set_current(current_mark);
3218
3219 return length;
3220 }
3221
3222 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3223 set_class_synthetic_flag(true);
3224 }
3225
3226 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3227 assert(cfs != NULL, "invariant");
3228
3229 const u2 signature_index = cfs->get_u2(CHECK);
3230 check_property(
3231 valid_symbol_at(signature_index),
3232 "Invalid constant pool index %u in Signature attribute in class file %s",
3233 signature_index, CHECK);
3234 set_class_generic_signature_index(signature_index);
3235 }
3236
3237 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3238 ConstantPool* cp,
3239 u4 attribute_byte_length,
3240 TRAPS) {
3241 assert(cfs != NULL, "invariant");
3242 assert(cp != NULL, "invariant");
3243
3244 const u1* const current_start = cfs->current();
3245
3246 guarantee_property(attribute_byte_length >= sizeof(u2),
3247 "Invalid BootstrapMethods attribute length %u in class file %s",
3248 attribute_byte_length,
3249 CHECK);
3250
3251 cfs->guarantee_more(attribute_byte_length, CHECK);
3252
3253 const int attribute_array_length = cfs->get_u2_fast();
3254
3255 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3256 "Short length on BootstrapMethods in class file %s",
3257 CHECK);
3258
3259
3260 // The attribute contains a counted array of counted tuples of shorts,
3261 // represending bootstrap specifiers:
3262 // length*{bootstrap_method_index, argument_count*{argument_index}}
3263 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3264 // operand_count = number of shorts in attr, except for leading length
3265
3266 // The attribute is copied into a short[] array.
3267 // The array begins with a series of short[2] pairs, one for each tuple.
3268 const int index_size = (attribute_array_length * 2);
3269
3270 Array<u2>* const operands =
3271 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3272
3273 // Eagerly assign operands so they will be deallocated with the constant
3274 // pool if there is an error.
3275 cp->set_operands(operands);
3276
3277 int operand_fill_index = index_size;
3278 const int cp_size = cp->length();
3279
3280 for (int n = 0; n < attribute_array_length; n++) {
3281 // Store a 32-bit offset into the header of the operand array.
3282 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3283
3284 // Read a bootstrap specifier.
3285 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3286 const u2 bootstrap_method_index = cfs->get_u2_fast();
3287 const u2 argument_count = cfs->get_u2_fast();
3288 check_property(
3289 valid_cp_range(bootstrap_method_index, cp_size) &&
3290 cp->tag_at(bootstrap_method_index).is_method_handle(),
3291 "bootstrap_method_index %u has bad constant type in class file %s",
3292 bootstrap_method_index,
3293 CHECK);
3294
3295 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3296 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3297 CHECK);
3298
3299 operands->at_put(operand_fill_index++, bootstrap_method_index);
3300 operands->at_put(operand_fill_index++, argument_count);
3301
3302 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3303 for (int j = 0; j < argument_count; j++) {
3304 const u2 argument_index = cfs->get_u2_fast();
3305 check_property(
3306 valid_cp_range(argument_index, cp_size) &&
3307 cp->tag_at(argument_index).is_loadable_constant(),
3308 "argument_index %u has bad constant type in class file %s",
3309 argument_index,
3310 CHECK);
3311 operands->at_put(operand_fill_index++, argument_index);
3312 }
3313 }
3314 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3315 "Bad length on BootstrapMethods in class file %s",
3316 CHECK);
3317 }
3318
3319 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3320 ConstantPool* cp,
3321 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3322 TRAPS) {
3323 assert(cfs != NULL, "invariant");
3324 assert(cp != NULL, "invariant");
3325 assert(parsed_annotations != NULL, "invariant");
3326
3327 // Set inner classes attribute to default sentinel
3328 _inner_classes = Universe::the_empty_short_array();
3329 // Set nest members attribute to default sentinel
3330 _nest_members = Universe::the_empty_short_array();
3331 cfs->guarantee_more(2, CHECK); // attributes_count
3332 u2 attributes_count = cfs->get_u2_fast();
3333 bool parsed_sourcefile_attribute = false;
3334 bool parsed_innerclasses_attribute = false;
3335 bool parsed_nest_members_attribute = false;
3336 bool parsed_nest_host_attribute = false;
3337 bool parsed_enclosingmethod_attribute = false;
3338 bool parsed_bootstrap_methods_attribute = false;
3339 const u1* runtime_visible_annotations = NULL;
3340 int runtime_visible_annotations_length = 0;
3341 const u1* runtime_invisible_annotations = NULL;
3342 int runtime_invisible_annotations_length = 0;
3343 const u1* runtime_visible_type_annotations = NULL;
3344 int runtime_visible_type_annotations_length = 0;
3345 const u1* runtime_invisible_type_annotations = NULL;
3346 int runtime_invisible_type_annotations_length = 0;
3347 bool runtime_invisible_type_annotations_exists = false;
3348 bool runtime_invisible_annotations_exists = false;
3349 bool parsed_source_debug_ext_annotations_exist = false;
3350 const u1* inner_classes_attribute_start = NULL;
3351 u4 inner_classes_attribute_length = 0;
3352 u2 enclosing_method_class_index = 0;
3353 u2 enclosing_method_method_index = 0;
3354 const u1* nest_members_attribute_start = NULL;
3355 u4 nest_members_attribute_length = 0;
3356
3357 // Iterate over attributes
3358 while (attributes_count--) {
3359 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3360 const u2 attribute_name_index = cfs->get_u2_fast();
3361 const u4 attribute_length = cfs->get_u4_fast();
3362 check_property(
3363 valid_symbol_at(attribute_name_index),
3364 "Attribute name has bad constant pool index %u in class file %s",
3365 attribute_name_index, CHECK);
3366 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3367 if (tag == vmSymbols::tag_source_file()) {
3368 // Check for SourceFile tag
3369 if (_need_verify) {
3370 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3371 }
3372 if (parsed_sourcefile_attribute) {
3373 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3374 } else {
3375 parsed_sourcefile_attribute = true;
3376 }
3377 parse_classfile_sourcefile_attribute(cfs, CHECK);
3378 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3379 // Check for SourceDebugExtension tag
3380 if (parsed_source_debug_ext_annotations_exist) {
3381 classfile_parse_error(
3382 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3383 }
3384 parsed_source_debug_ext_annotations_exist = true;
3385 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3386 } else if (tag == vmSymbols::tag_inner_classes()) {
3387 // Check for InnerClasses tag
3388 if (parsed_innerclasses_attribute) {
3389 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3390 } else {
3391 parsed_innerclasses_attribute = true;
3392 }
3393 inner_classes_attribute_start = cfs->current();
3394 inner_classes_attribute_length = attribute_length;
3395 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3396 } else if (tag == vmSymbols::tag_synthetic()) {
3397 // Check for Synthetic tag
3398 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3399 if (attribute_length != 0) {
3400 classfile_parse_error(
3401 "Invalid Synthetic classfile attribute length %u in class file %s",
3402 attribute_length, CHECK);
3403 }
3404 parse_classfile_synthetic_attribute(CHECK);
3405 } else if (tag == vmSymbols::tag_deprecated()) {
3406 // Check for Deprecatd tag - 4276120
3407 if (attribute_length != 0) {
3408 classfile_parse_error(
3409 "Invalid Deprecated classfile attribute length %u in class file %s",
3410 attribute_length, CHECK);
3411 }
3412 } else if (_major_version >= JAVA_1_5_VERSION) {
3413 if (tag == vmSymbols::tag_signature()) {
3414 if (_generic_signature_index != 0) {
3415 classfile_parse_error(
3416 "Multiple Signature attributes in class file %s", CHECK);
3417 }
3418 if (attribute_length != 2) {
3419 classfile_parse_error(
3420 "Wrong Signature attribute length %u in class file %s",
3421 attribute_length, CHECK);
3422 }
3423 parse_classfile_signature_attribute(cfs, CHECK);
3424 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3425 if (runtime_visible_annotations != NULL) {
3426 classfile_parse_error(
3427 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3428 }
3429 runtime_visible_annotations_length = attribute_length;
3430 runtime_visible_annotations = cfs->current();
3431 assert(runtime_visible_annotations != NULL, "null visible annotations");
3432 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3433 parse_annotations(cp,
3434 runtime_visible_annotations,
3435 runtime_visible_annotations_length,
3436 parsed_annotations,
3437 _loader_data,
3438 CHECK);
3439 cfs->skip_u1_fast(runtime_visible_annotations_length);
3440 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3441 if (runtime_invisible_annotations_exists) {
3442 classfile_parse_error(
3443 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3444 }
3445 runtime_invisible_annotations_exists = true;
3446 if (PreserveAllAnnotations) {
3447 runtime_invisible_annotations_length = attribute_length;
3448 runtime_invisible_annotations = cfs->current();
3449 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3450 }
3451 cfs->skip_u1(attribute_length, CHECK);
3452 } else if (tag == vmSymbols::tag_enclosing_method()) {
3453 if (parsed_enclosingmethod_attribute) {
3454 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3455 } else {
3456 parsed_enclosingmethod_attribute = true;
3457 }
3458 guarantee_property(attribute_length == 4,
3459 "Wrong EnclosingMethod attribute length %u in class file %s",
3460 attribute_length, CHECK);
3461 cfs->guarantee_more(4, CHECK); // class_index, method_index
3462 enclosing_method_class_index = cfs->get_u2_fast();
3463 enclosing_method_method_index = cfs->get_u2_fast();
3464 if (enclosing_method_class_index == 0) {
3465 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3466 }
3467 // Validate the constant pool indices and types
3468 check_property(valid_klass_reference_at(enclosing_method_class_index),
3469 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3470 if (enclosing_method_method_index != 0 &&
3471 (!cp->is_within_bounds(enclosing_method_method_index) ||
3472 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3473 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3474 }
3475 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3476 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3477 if (parsed_bootstrap_methods_attribute) {
3478 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3479 }
3480 parsed_bootstrap_methods_attribute = true;
3481 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3482 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3483 if (runtime_visible_type_annotations != NULL) {
3484 classfile_parse_error(
3485 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3486 }
3487 runtime_visible_type_annotations_length = attribute_length;
3488 runtime_visible_type_annotations = cfs->current();
3489 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3490 // No need for the VM to parse Type annotations
3491 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3492 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3493 if (runtime_invisible_type_annotations_exists) {
3494 classfile_parse_error(
3495 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3496 } else {
3497 runtime_invisible_type_annotations_exists = true;
3498 }
3499 if (PreserveAllAnnotations) {
3500 runtime_invisible_type_annotations_length = attribute_length;
3501 runtime_invisible_type_annotations = cfs->current();
3502 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3503 }
3504 cfs->skip_u1(attribute_length, CHECK);
3505 } else if (_major_version >= JAVA_11_VERSION) {
3506 if (tag == vmSymbols::tag_nest_members()) {
3507 // Check for NestMembers tag
3508 if (parsed_nest_members_attribute) {
3509 classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3510 } else {
3511 parsed_nest_members_attribute = true;
3512 }
3513 if (parsed_nest_host_attribute) {
3514 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3515 }
3516 nest_members_attribute_start = cfs->current();
3517 nest_members_attribute_length = attribute_length;
3518 cfs->skip_u1(nest_members_attribute_length, CHECK);
3519 } else if (tag == vmSymbols::tag_nest_host()) {
3520 if (parsed_nest_host_attribute) {
3521 classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3522 } else {
3523 parsed_nest_host_attribute = true;
3524 }
3525 if (parsed_nest_members_attribute) {
3526 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3527 }
3528 if (_need_verify) {
3529 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3530 }
3531 cfs->guarantee_more(2, CHECK);
3532 u2 class_info_index = cfs->get_u2_fast();
3533 check_property(
3534 valid_klass_reference_at(class_info_index),
3535 "Nest-host class_info_index %u has bad constant type in class file %s",
3536 class_info_index, CHECK);
3537 _nest_host = class_info_index;
3538 } else {
3539 // Unknown attribute
3540 cfs->skip_u1(attribute_length, CHECK);
3541 }
3542 } else {
3543 // Unknown attribute
3544 cfs->skip_u1(attribute_length, CHECK);
3545 }
3546 } else {
3547 // Unknown attribute
3548 cfs->skip_u1(attribute_length, CHECK);
3549 }
3550 }
3551 _annotations = assemble_annotations(runtime_visible_annotations,
3552 runtime_visible_annotations_length,
3553 runtime_invisible_annotations,
3554 runtime_invisible_annotations_length,
3555 CHECK);
3556 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3557 runtime_visible_type_annotations_length,
3558 runtime_invisible_type_annotations,
3559 runtime_invisible_type_annotations_length,
3560 CHECK);
3561
3562 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3563 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3564 cfs,
3565 inner_classes_attribute_start,
3566 parsed_innerclasses_attribute,
3567 enclosing_method_class_index,
3568 enclosing_method_method_index,
3569 CHECK);
3570 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3571 guarantee_property(
3572 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3573 "Wrong InnerClasses attribute length in class file %s", CHECK);
3574 }
3575 }
3576
3577 if (parsed_nest_members_attribute) {
3578 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3579 cfs,
3580 nest_members_attribute_start,
3581 CHECK);
3582 if (_need_verify) {
3583 guarantee_property(
3584 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3585 "Wrong NestMembers attribute length in class file %s", CHECK);
3586 }
3587 }
3588
3589 if (_max_bootstrap_specifier_index >= 0) {
3590 guarantee_property(parsed_bootstrap_methods_attribute,
3591 "Missing BootstrapMethods attribute in class file %s", CHECK);
3592 }
3593 }
3594
3595 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3596 assert(k != NULL, "invariant");
3597
3598 if (_synthetic_flag)
3599 k->set_is_synthetic();
3600 if (_sourcefile_index != 0) {
3601 k->set_source_file_name_index(_sourcefile_index);
3602 }
3603 if (_generic_signature_index != 0) {
3604 k->set_generic_signature_index(_generic_signature_index);
3605 }
3606 if (_sde_buffer != NULL) {
3607 k->set_source_debug_extension(_sde_buffer, _sde_length);
3608 }
3609 }
3610
3611 // Create the Annotations object that will
3612 // hold the annotations array for the Klass.
3613 void ClassFileParser::create_combined_annotations(TRAPS) {
3614 if (_annotations == NULL &&
3615 _type_annotations == NULL &&
3616 _fields_annotations == NULL &&
3617 _fields_type_annotations == NULL) {
3618 // Don't create the Annotations object unnecessarily.
3619 return;
3620 }
3621
3622 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3623 annotations->set_class_annotations(_annotations);
3624 annotations->set_class_type_annotations(_type_annotations);
3625 annotations->set_fields_annotations(_fields_annotations);
3626 annotations->set_fields_type_annotations(_fields_type_annotations);
3627
3628 // This is the Annotations object that will be
3629 // assigned to InstanceKlass being constructed.
3630 _combined_annotations = annotations;
3631
3632 // The annotations arrays below has been transfered the
3633 // _combined_annotations so these fields can now be cleared.
3634 _annotations = NULL;
3635 _type_annotations = NULL;
3636 _fields_annotations = NULL;
3637 _fields_type_annotations = NULL;
3638 }
3639
3640 // Transfer ownership of metadata allocated to the InstanceKlass.
3641 void ClassFileParser::apply_parsed_class_metadata(
3642 InstanceKlass* this_klass,
3643 int java_fields_count, TRAPS) {
3644 assert(this_klass != NULL, "invariant");
3645
3646 _cp->set_pool_holder(this_klass);
3647 this_klass->set_constants(_cp);
3648 this_klass->set_fields(_fields, java_fields_count);
3649 this_klass->set_methods(_methods);
3650 this_klass->set_inner_classes(_inner_classes);
3651 this_klass->set_nest_members(_nest_members);
3652 this_klass->set_nest_host_index(_nest_host);
3653 this_klass->set_local_interfaces(_local_interfaces);
3654 this_klass->set_annotations(_combined_annotations);
3655 // Delay the setting of _transitive_interfaces until after initialize_supers() in
3656 // fill_instance_klass(). It is because the _transitive_interfaces may be shared with
3657 // its _super. If an OOM occurs while loading the current klass, its _super field
3658 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3659 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3660 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3661
3662 // Clear out these fields so they don't get deallocated by the destructor
3663 clear_class_metadata();
3664 }
3665
3666 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3667 int runtime_visible_annotations_length,
3668 const u1* const runtime_invisible_annotations,
3669 int runtime_invisible_annotations_length,
3670 TRAPS) {
3671 AnnotationArray* annotations = NULL;
3672 if (runtime_visible_annotations != NULL ||
3673 runtime_invisible_annotations != NULL) {
3674 annotations = MetadataFactory::new_array<u1>(_loader_data,
3675 runtime_visible_annotations_length +
3676 runtime_invisible_annotations_length,
3677 CHECK_(annotations));
3678 if (runtime_visible_annotations != NULL) {
3679 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3680 annotations->at_put(i, runtime_visible_annotations[i]);
3681 }
3682 }
3683 if (runtime_invisible_annotations != NULL) {
3684 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3685 int append = runtime_visible_annotations_length+i;
3686 annotations->at_put(append, runtime_invisible_annotations[i]);
3687 }
3688 }
3689 }
3690 return annotations;
3691 }
3692
3693 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3694 const int super_class_index,
3695 const bool need_verify,
3696 TRAPS) {
3697 assert(cp != NULL, "invariant");
3698 const InstanceKlass* super_klass = NULL;
3699
3700 if (super_class_index == 0) {
3701 check_property(_class_name == vmSymbols::java_lang_Object(),
3702 "Invalid superclass index %u in class file %s",
3703 super_class_index,
3704 CHECK_NULL);
3705 } else {
3706 check_property(valid_klass_reference_at(super_class_index),
3707 "Invalid superclass index %u in class file %s",
3708 super_class_index,
3709 CHECK_NULL);
3710 // The class name should be legal because it is checked when parsing constant pool.
3711 // However, make sure it is not an array type.
3712 bool is_array = false;
3713 if (cp->tag_at(super_class_index).is_klass()) {
3714 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3715 if (need_verify)
3716 is_array = super_klass->is_array_klass();
3717 } else if (need_verify) {
3718 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3719 }
3720 if (need_verify) {
3721 guarantee_property(!is_array,
3722 "Bad superclass name in class file %s", CHECK_NULL);
3723 }
3724 }
3725 return super_klass;
3726 }
3727
3728 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3729 unsigned int nonstatic_oop_map_count,
3730 int first_nonstatic_oop_offset) {
3731
3732 unsigned int map_count =
3733 NULL == super ? 0 : super->nonstatic_oop_map_count();
3734 if (nonstatic_oop_map_count > 0) {
3735 // We have oops to add to map
3736 if (map_count == 0) {
3737 map_count = nonstatic_oop_map_count;
3738 }
3739 else {
3740 // Check whether we should add a new map block or whether the last one can
3741 // be extended
3742 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3743 const OopMapBlock* const last_map = first_map + map_count - 1;
3744
3745 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3746 if (next_offset == first_nonstatic_oop_offset) {
3747 // There is no gap bettwen superklass's last oop field and first
3748 // local oop field, merge maps.
3749 nonstatic_oop_map_count -= 1;
3750 }
3751 else {
3752 // Superklass didn't end with a oop field, add extra maps
3753 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3754 }
3755 map_count += nonstatic_oop_map_count;
3756 }
3757 }
3758 return map_count;
3759 }
3760
3761 #ifndef PRODUCT
3762 static void print_field_layout(const Symbol* name,
3763 Array<u2>* fields,
3764 const constantPoolHandle& cp,
3765 int instance_size,
3766 int instance_fields_start,
3767 int instance_fields_end,
3768 int static_fields_end) {
3769
3770 assert(name != NULL, "invariant");
3771
3772 tty->print("%s: field layout\n", name->as_klass_external_name());
3773 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3774 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3775 if (!fs.access_flags().is_static()) {
3776 tty->print(" @%3d \"%s\" %s\n",
3777 fs.offset(),
3778 fs.name()->as_klass_external_name(),
3779 fs.signature()->as_klass_external_name());
3780 }
3781 }
3782 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3783 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3784 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3785 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3786 if (fs.access_flags().is_static()) {
3787 tty->print(" @%3d \"%s\" %s\n",
3788 fs.offset(),
3789 fs.name()->as_klass_external_name(),
3790 fs.signature()->as_klass_external_name());
3791 }
3792 }
3793 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3794 tty->print("\n");
3795 }
3796 #endif
3797
3798 // Values needed for oopmap and InstanceKlass creation
3799 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3800 public:
3801 int* nonstatic_oop_offsets;
3802 unsigned int* nonstatic_oop_counts;
3803 unsigned int nonstatic_oop_map_count;
3804 unsigned int total_oop_map_count;
3805 int instance_size;
3806 int nonstatic_field_size;
3807 int static_field_size;
3808 bool has_nonstatic_fields;
3809 };
3810
3811 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3812 void ClassFileParser::layout_fields(ConstantPool* cp,
3813 const FieldAllocationCount* fac,
3814 const ClassAnnotationCollector* parsed_annotations,
3815 FieldLayoutInfo* info,
3816 TRAPS) {
3817
3818 assert(cp != NULL, "invariant");
3819
3820 // Field size and offset computation
3821 int nonstatic_field_size = _super_klass == NULL ? 0 :
3822 _super_klass->nonstatic_field_size();
3823
3824 // Count the contended fields by type.
3825 //
3826 // We ignore static fields, because @Contended is not supported for them.
3827 // The layout code below will also ignore the static fields.
3828 int nonstatic_contended_count = 0;
3829 FieldAllocationCount fac_contended;
3830 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3831 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3832 if (fs.is_contended()) {
3833 fac_contended.count[atype]++;
3834 if (!fs.access_flags().is_static()) {
3835 nonstatic_contended_count++;
3836 }
3837 }
3838 }
3839
3840
3841 // Calculate the starting byte offsets
3842 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3843 int next_static_double_offset = next_static_oop_offset +
3844 ((fac->count[STATIC_OOP]) * heapOopSize);
3845 if (fac->count[STATIC_DOUBLE]) {
3846 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3847 }
3848
3849 int next_static_word_offset = next_static_double_offset +
3850 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3851 int next_static_short_offset = next_static_word_offset +
3852 ((fac->count[STATIC_WORD]) * BytesPerInt);
3853 int next_static_byte_offset = next_static_short_offset +
3854 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3855
3856 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3857 nonstatic_field_size * heapOopSize;
3858
3859 int next_nonstatic_field_offset = nonstatic_fields_start;
3860
3861 const bool is_contended_class = parsed_annotations->is_contended();
3862
3863 // Class is contended, pad before all the fields
3864 if (is_contended_class) {
3865 next_nonstatic_field_offset += ContendedPaddingWidth;
3866 }
3867
3868 // Compute the non-contended fields count.
3869 // The packing code below relies on these counts to determine if some field
3870 // can be squeezed into the alignment gap. Contended fields are obviously
3871 // exempt from that.
3872 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3873 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3874 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3875 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3876 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3877
3878 // Total non-static fields count, including every contended field
3879 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3880 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3881 fac->count[NONSTATIC_OOP];
3882
3883 const bool super_has_nonstatic_fields =
3884 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3885 const bool has_nonstatic_fields =
3886 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3887
3888
3889 // Prepare list of oops for oop map generation.
3890 //
3891 // "offset" and "count" lists are describing the set of contiguous oop
3892 // regions. offset[i] is the start of the i-th region, which then has
3893 // count[i] oops following. Before we know how many regions are required,
3894 // we pessimistically allocate the maps to fit all the oops into the
3895 // distinct regions.
3896 //
3897 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3898 // to figure out if we still need to do this.
3899 unsigned int nonstatic_oop_map_count = 0;
3900 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3901
3902 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3903 THREAD, int, max_nonstatic_oop_maps);
3904 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3905 THREAD, unsigned int, max_nonstatic_oop_maps);
3906
3907 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3908
3909 bool compact_fields = CompactFields;
3910 int allocation_style = FieldsAllocationStyle;
3911 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3912 assert(false, "0 <= FieldsAllocationStyle <= 2");
3913 allocation_style = 1; // Optimistic
3914 }
3915
3916 // The next classes have predefined hard-coded fields offsets
3917 // (see in JavaClasses::compute_hard_coded_offsets()).
3918 // Use default fields allocation order for them.
3919 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3920 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3921 _class_name == vmSymbols::java_lang_Class() ||
3922 _class_name == vmSymbols::java_lang_ClassLoader() ||
3923 _class_name == vmSymbols::java_lang_ref_Reference() ||
3924 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3925 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3926 _class_name == vmSymbols::java_lang_String() ||
3927 _class_name == vmSymbols::java_lang_Throwable() ||
3928 _class_name == vmSymbols::java_lang_Boolean() ||
3929 _class_name == vmSymbols::java_lang_Character() ||
3930 _class_name == vmSymbols::java_lang_Float() ||
3931 _class_name == vmSymbols::java_lang_Double() ||
3932 _class_name == vmSymbols::java_lang_Byte() ||
3933 _class_name == vmSymbols::java_lang_Short() ||
3934 _class_name == vmSymbols::java_lang_Integer() ||
3935 _class_name == vmSymbols::java_lang_Long())) {
3936 allocation_style = 0; // Allocate oops first
3937 compact_fields = false; // Don't compact fields
3938 }
3939
3940 int next_nonstatic_oop_offset = 0;
3941 int next_nonstatic_double_offset = 0;
3942
3943 // Rearrange fields for a given allocation style
3944 if( allocation_style == 0 ) {
3945 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3946 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3947 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3948 (nonstatic_oop_count * heapOopSize);
3949 } else if( allocation_style == 1 ) {
3950 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3951 next_nonstatic_double_offset = next_nonstatic_field_offset;
3952 } else if( allocation_style == 2 ) {
3953 // Fields allocation: oops fields in super and sub classes are together.
3954 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3955 _super_klass->nonstatic_oop_map_size() > 0 ) {
3956 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3957 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3958 const OopMapBlock* const last_map = first_map + map_count - 1;
3959 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3960 if (next_offset == next_nonstatic_field_offset) {
3961 allocation_style = 0; // allocate oops first
3962 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3963 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3964 (nonstatic_oop_count * heapOopSize);
3965 }
3966 }
3967 if( allocation_style == 2 ) {
3968 allocation_style = 1; // allocate oops last
3969 next_nonstatic_double_offset = next_nonstatic_field_offset;
3970 }
3971 } else {
3972 ShouldNotReachHere();
3973 }
3974
3975 int nonstatic_oop_space_count = 0;
3976 int nonstatic_word_space_count = 0;
3977 int nonstatic_short_space_count = 0;
3978 int nonstatic_byte_space_count = 0;
3979 int nonstatic_oop_space_offset = 0;
3980 int nonstatic_word_space_offset = 0;
3981 int nonstatic_short_space_offset = 0;
3982 int nonstatic_byte_space_offset = 0;
3983
3984 // Try to squeeze some of the fields into the gaps due to
3985 // long/double alignment.
3986 if (nonstatic_double_count > 0) {
3987 int offset = next_nonstatic_double_offset;
3988 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
3989 if (compact_fields && offset != next_nonstatic_double_offset) {
3990 // Allocate available fields into the gap before double field.
3991 int length = next_nonstatic_double_offset - offset;
3992 assert(length == BytesPerInt, "");
3993 nonstatic_word_space_offset = offset;
3994 if (nonstatic_word_count > 0) {
3995 nonstatic_word_count -= 1;
3996 nonstatic_word_space_count = 1; // Only one will fit
3997 length -= BytesPerInt;
3998 offset += BytesPerInt;
3999 }
4000 nonstatic_short_space_offset = offset;
4001 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4002 nonstatic_short_count -= 1;
4003 nonstatic_short_space_count += 1;
4004 length -= BytesPerShort;
4005 offset += BytesPerShort;
4006 }
4007 nonstatic_byte_space_offset = offset;
4008 while (length > 0 && nonstatic_byte_count > 0) {
4009 nonstatic_byte_count -= 1;
4010 nonstatic_byte_space_count += 1;
4011 length -= 1;
4012 }
4013 // Allocate oop field in the gap if there are no other fields for that.
4014 nonstatic_oop_space_offset = offset;
4015 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4016 allocation_style != 0) { // when oop fields not first
4017 nonstatic_oop_count -= 1;
4018 nonstatic_oop_space_count = 1; // Only one will fit
4019 length -= heapOopSize;
4020 offset += heapOopSize;
4021 }
4022 }
4023 }
4024
4025 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4026 (nonstatic_double_count * BytesPerLong);
4027 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4028 (nonstatic_word_count * BytesPerInt);
4029 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4030 (nonstatic_short_count * BytesPerShort);
4031 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4032 nonstatic_byte_count;
4033
4034 // let oops jump before padding with this allocation style
4035 if( allocation_style == 1 ) {
4036 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4037 if( nonstatic_oop_count > 0 ) {
4038 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4039 }
4040 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4041 }
4042
4043 // Iterate over fields again and compute correct offsets.
4044 // The field allocation type was temporarily stored in the offset slot.
4045 // oop fields are located before non-oop fields (static and non-static).
4046 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4047
4048 // skip already laid out fields
4049 if (fs.is_offset_set()) continue;
4050
4051 // contended instance fields are handled below
4052 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4053
4054 int real_offset = 0;
4055 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4056
4057 // pack the rest of the fields
4058 switch (atype) {
4059 case STATIC_OOP:
4060 real_offset = next_static_oop_offset;
4061 next_static_oop_offset += heapOopSize;
4062 break;
4063 case STATIC_BYTE:
4064 real_offset = next_static_byte_offset;
4065 next_static_byte_offset += 1;
4066 break;
4067 case STATIC_SHORT:
4068 real_offset = next_static_short_offset;
4069 next_static_short_offset += BytesPerShort;
4070 break;
4071 case STATIC_WORD:
4072 real_offset = next_static_word_offset;
4073 next_static_word_offset += BytesPerInt;
4074 break;
4075 case STATIC_DOUBLE:
4076 real_offset = next_static_double_offset;
4077 next_static_double_offset += BytesPerLong;
4078 break;
4079 case NONSTATIC_OOP:
4080 if( nonstatic_oop_space_count > 0 ) {
4081 real_offset = nonstatic_oop_space_offset;
4082 nonstatic_oop_space_offset += heapOopSize;
4083 nonstatic_oop_space_count -= 1;
4084 } else {
4085 real_offset = next_nonstatic_oop_offset;
4086 next_nonstatic_oop_offset += heapOopSize;
4087 }
4088
4089 // Record this oop in the oop maps
4090 if( nonstatic_oop_map_count > 0 &&
4091 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4092 real_offset -
4093 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4094 heapOopSize ) {
4095 // This oop is adjacent to the previous one, add to current oop map
4096 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4097 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4098 } else {
4099 // This oop is not adjacent to the previous one, create new oop map
4100 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4101 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4102 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4103 nonstatic_oop_map_count += 1;
4104 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4105 first_nonstatic_oop_offset = real_offset;
4106 }
4107 }
4108 break;
4109 case NONSTATIC_BYTE:
4110 if( nonstatic_byte_space_count > 0 ) {
4111 real_offset = nonstatic_byte_space_offset;
4112 nonstatic_byte_space_offset += 1;
4113 nonstatic_byte_space_count -= 1;
4114 } else {
4115 real_offset = next_nonstatic_byte_offset;
4116 next_nonstatic_byte_offset += 1;
4117 }
4118 break;
4119 case NONSTATIC_SHORT:
4120 if( nonstatic_short_space_count > 0 ) {
4121 real_offset = nonstatic_short_space_offset;
4122 nonstatic_short_space_offset += BytesPerShort;
4123 nonstatic_short_space_count -= 1;
4124 } else {
4125 real_offset = next_nonstatic_short_offset;
4126 next_nonstatic_short_offset += BytesPerShort;
4127 }
4128 break;
4129 case NONSTATIC_WORD:
4130 if( nonstatic_word_space_count > 0 ) {
4131 real_offset = nonstatic_word_space_offset;
4132 nonstatic_word_space_offset += BytesPerInt;
4133 nonstatic_word_space_count -= 1;
4134 } else {
4135 real_offset = next_nonstatic_word_offset;
4136 next_nonstatic_word_offset += BytesPerInt;
4137 }
4138 break;
4139 case NONSTATIC_DOUBLE:
4140 real_offset = next_nonstatic_double_offset;
4141 next_nonstatic_double_offset += BytesPerLong;
4142 break;
4143 default:
4144 ShouldNotReachHere();
4145 }
4146 fs.set_offset(real_offset);
4147 }
4148
4149
4150 // Handle the contended cases.
4151 //
4152 // Each contended field should not intersect the cache line with another contended field.
4153 // In the absence of alignment information, we end up with pessimistically separating
4154 // the fields with full-width padding.
4155 //
4156 // Additionally, this should not break alignment for the fields, so we round the alignment up
4157 // for each field.
4158 if (nonstatic_contended_count > 0) {
4159
4160 // if there is at least one contended field, we need to have pre-padding for them
4161 next_nonstatic_padded_offset += ContendedPaddingWidth;
4162
4163 // collect all contended groups
4164 ResourceBitMap bm(cp->size());
4165 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4166 // skip already laid out fields
4167 if (fs.is_offset_set()) continue;
4168
4169 if (fs.is_contended()) {
4170 bm.set_bit(fs.contended_group());
4171 }
4172 }
4173
4174 int current_group = -1;
4175 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4176
4177 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4178
4179 // skip already laid out fields
4180 if (fs.is_offset_set()) continue;
4181
4182 // skip non-contended fields and fields from different group
4183 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4184
4185 // handle statics below
4186 if (fs.access_flags().is_static()) continue;
4187
4188 int real_offset = 0;
4189 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4190
4191 switch (atype) {
4192 case NONSTATIC_BYTE:
4193 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4194 real_offset = next_nonstatic_padded_offset;
4195 next_nonstatic_padded_offset += 1;
4196 break;
4197
4198 case NONSTATIC_SHORT:
4199 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4200 real_offset = next_nonstatic_padded_offset;
4201 next_nonstatic_padded_offset += BytesPerShort;
4202 break;
4203
4204 case NONSTATIC_WORD:
4205 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4206 real_offset = next_nonstatic_padded_offset;
4207 next_nonstatic_padded_offset += BytesPerInt;
4208 break;
4209
4210 case NONSTATIC_DOUBLE:
4211 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4212 real_offset = next_nonstatic_padded_offset;
4213 next_nonstatic_padded_offset += BytesPerLong;
4214 break;
4215
4216 case NONSTATIC_OOP:
4217 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4218 real_offset = next_nonstatic_padded_offset;
4219 next_nonstatic_padded_offset += heapOopSize;
4220
4221 // Record this oop in the oop maps
4222 if( nonstatic_oop_map_count > 0 &&
4223 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4224 real_offset -
4225 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4226 heapOopSize ) {
4227 // This oop is adjacent to the previous one, add to current oop map
4228 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4229 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4230 } else {
4231 // This oop is not adjacent to the previous one, create new oop map
4232 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4233 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4234 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4235 nonstatic_oop_map_count += 1;
4236 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4237 first_nonstatic_oop_offset = real_offset;
4238 }
4239 }
4240 break;
4241
4242 default:
4243 ShouldNotReachHere();
4244 }
4245
4246 if (fs.contended_group() == 0) {
4247 // Contended group defines the equivalence class over the fields:
4248 // the fields within the same contended group are not inter-padded.
4249 // The only exception is default group, which does not incur the
4250 // equivalence, and so requires intra-padding.
4251 next_nonstatic_padded_offset += ContendedPaddingWidth;
4252 }
4253
4254 fs.set_offset(real_offset);
4255 } // for
4256
4257 // Start laying out the next group.
4258 // Note that this will effectively pad the last group in the back;
4259 // this is expected to alleviate memory contention effects for
4260 // subclass fields and/or adjacent object.
4261 // If this was the default group, the padding is already in place.
4262 if (current_group != 0) {
4263 next_nonstatic_padded_offset += ContendedPaddingWidth;
4264 }
4265 }
4266
4267 // handle static fields
4268 }
4269
4270 // Entire class is contended, pad in the back.
4271 // This helps to alleviate memory contention effects for subclass fields
4272 // and/or adjacent object.
4273 if (is_contended_class) {
4274 next_nonstatic_padded_offset += ContendedPaddingWidth;
4275 }
4276
4277 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4278
4279 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, heapOopSize);
4280 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4281 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4282
4283 int static_field_size = (static_fields_end -
4284 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4285 nonstatic_field_size = nonstatic_field_size +
4286 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4287
4288 int instance_size = align_object_size(instance_end / wordSize);
4289
4290 assert(instance_size == align_object_size(align_up(
4291 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4292 wordSize) / wordSize), "consistent layout helper value");
4293
4294 // Invariant: nonstatic_field end/start should only change if there are
4295 // nonstatic fields in the class, or if the class is contended. We compare
4296 // against the non-aligned value, so that end alignment will not fail the
4297 // assert without actually having the fields.
4298 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4299 is_contended_class ||
4300 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4301
4302 // Number of non-static oop map blocks allocated at end of klass.
4303 const unsigned int total_oop_map_count =
4304 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4305 first_nonstatic_oop_offset);
4306
4307 #ifndef PRODUCT
4308 if (PrintFieldLayout) {
4309 print_field_layout(_class_name,
4310 _fields,
4311 cp,
4312 instance_size,
4313 nonstatic_fields_start,
4314 nonstatic_fields_end,
4315 static_fields_end);
4316 }
4317
4318 #endif
4319 // Pass back information needed for InstanceKlass creation
4320 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4321 info->nonstatic_oop_counts = nonstatic_oop_counts;
4322 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4323 info->total_oop_map_count = total_oop_map_count;
4324 info->instance_size = instance_size;
4325 info->static_field_size = static_field_size;
4326 info->nonstatic_field_size = nonstatic_field_size;
4327 info->has_nonstatic_fields = has_nonstatic_fields;
4328 }
4329
4330 static void fill_oop_maps(const InstanceKlass* k,
4331 unsigned int nonstatic_oop_map_count,
4332 const int* nonstatic_oop_offsets,
4333 const unsigned int* nonstatic_oop_counts) {
4334
4335 assert(k != NULL, "invariant");
4336
4337 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4338 const InstanceKlass* const super = k->superklass();
4339 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4340 if (super_count > 0) {
4341 // Copy maps from superklass
4342 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4343 for (unsigned int i = 0; i < super_count; ++i) {
4344 *this_oop_map++ = *super_oop_map++;
4345 }
4346 }
4347
4348 if (nonstatic_oop_map_count > 0) {
4349 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4350 // The counts differ because there is no gap between superklass's last oop
4351 // field and the first local oop field. Extend the last oop map copied
4352 // from the superklass instead of creating new one.
4353 nonstatic_oop_map_count--;
4354 nonstatic_oop_offsets++;
4355 this_oop_map--;
4356 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4357 this_oop_map++;
4358 }
4359
4360 // Add new map blocks, fill them
4361 while (nonstatic_oop_map_count-- > 0) {
4362 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4363 this_oop_map->set_count(*nonstatic_oop_counts++);
4364 this_oop_map++;
4365 }
4366 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4367 this_oop_map, "sanity");
4368 }
4369 }
4370
4371
4372 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4373 assert(ik != NULL, "invariant");
4374
4375 const Klass* const super = ik->super();
4376
4377 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4378 // in which case we don't have to register objects as finalizable
4379 if (!_has_empty_finalizer) {
4380 if (_has_finalizer ||
4381 (super != NULL && super->has_finalizer())) {
4382 ik->set_has_finalizer();
4383 }
4384 }
4385
4386 #ifdef ASSERT
4387 bool f = false;
4388 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4389 vmSymbols::void_method_signature());
4390 if (m != NULL && !m->is_empty_method()) {
4391 f = true;
4392 }
4393
4394 // Spec doesn't prevent agent from redefinition of empty finalizer.
4395 // Despite the fact that it's generally bad idea and redefined finalizer
4396 // will not work as expected we shouldn't abort vm in this case
4397 if (!ik->has_redefined_this_or_super()) {
4398 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4399 }
4400 #endif
4401
4402 // Check if this klass supports the java.lang.Cloneable interface
4403 if (SystemDictionary::Cloneable_klass_loaded()) {
4404 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4405 ik->set_is_cloneable();
4406 }
4407 }
4408
4409 // Check if this klass has a vanilla default constructor
4410 if (super == NULL) {
4411 // java.lang.Object has empty default constructor
4412 ik->set_has_vanilla_constructor();
4413 } else {
4414 if (super->has_vanilla_constructor() &&
4415 _has_vanilla_constructor) {
4416 ik->set_has_vanilla_constructor();
4417 }
4418 #ifdef ASSERT
4419 bool v = false;
4420 if (super->has_vanilla_constructor()) {
4421 const Method* const constructor =
4422 ik->find_method(vmSymbols::object_initializer_name(),
4423 vmSymbols::void_method_signature());
4424 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4425 v = true;
4426 }
4427 }
4428 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4429 #endif
4430 }
4431
4432 // If it cannot be fast-path allocated, set a bit in the layout helper.
4433 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4434 assert(ik->size_helper() > 0, "layout_helper is initialized");
4435 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4436 || ik->is_abstract() || ik->is_interface()
4437 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4438 || ik->size_helper() >= FastAllocateSizeLimit) {
4439 // Forbid fast-path allocation.
4440 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4441 ik->set_layout_helper(lh);
4442 }
4443 }
4444
4445 // utility methods for appending an array with check for duplicates
4446
4447 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4448 const Array<InstanceKlass*>* const ifs) {
4449 // iterate over new interfaces
4450 for (int i = 0; i < ifs->length(); i++) {
4451 InstanceKlass* const e = ifs->at(i);
4452 assert(e->is_klass() && e->is_interface(), "just checking");
4453 // add new interface
4454 result->append_if_missing(e);
4455 }
4456 }
4457
4458 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4459 Array<InstanceKlass*>* local_ifs,
4460 ClassLoaderData* loader_data,
4461 TRAPS) {
4462 assert(local_ifs != NULL, "invariant");
4463 assert(loader_data != NULL, "invariant");
4464
4465 // Compute maximum size for transitive interfaces
4466 int max_transitive_size = 0;
4467 int super_size = 0;
4468 // Add superclass transitive interfaces size
4469 if (super != NULL) {
4470 super_size = super->transitive_interfaces()->length();
4471 max_transitive_size += super_size;
4472 }
4473 // Add local interfaces' super interfaces
4474 const int local_size = local_ifs->length();
4475 for (int i = 0; i < local_size; i++) {
4476 InstanceKlass* const l = local_ifs->at(i);
4477 max_transitive_size += l->transitive_interfaces()->length();
4478 }
4479 // Finally add local interfaces
4480 max_transitive_size += local_size;
4481 // Construct array
4482 if (max_transitive_size == 0) {
4483 // no interfaces, use canonicalized array
4484 return Universe::the_empty_instance_klass_array();
4485 } else if (max_transitive_size == super_size) {
4486 // no new local interfaces added, share superklass' transitive interface array
4487 return super->transitive_interfaces();
4488 } else if (max_transitive_size == local_size) {
4489 // only local interfaces added, share local interface array
4490 return local_ifs;
4491 } else {
4492 ResourceMark rm;
4493 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4494
4495 // Copy down from superclass
4496 if (super != NULL) {
4497 append_interfaces(result, super->transitive_interfaces());
4498 }
4499
4500 // Copy down from local interfaces' superinterfaces
4501 for (int i = 0; i < local_size; i++) {
4502 InstanceKlass* const l = local_ifs->at(i);
4503 append_interfaces(result, l->transitive_interfaces());
4504 }
4505 // Finally add local interfaces
4506 append_interfaces(result, local_ifs);
4507
4508 // length will be less than the max_transitive_size if duplicates were removed
4509 const int length = result->length();
4510 assert(length <= max_transitive_size, "just checking");
4511 Array<InstanceKlass*>* const new_result =
4512 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4513 for (int i = 0; i < length; i++) {
4514 InstanceKlass* const e = result->at(i);
4515 assert(e != NULL, "just checking");
4516 new_result->at_put(i, e);
4517 }
4518 return new_result;
4519 }
4520 }
4521
4522 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4523 assert(this_klass != NULL, "invariant");
4524 const Klass* const super = this_klass->super();
4525 if (super != NULL) {
4526
4527 // If the loader is not the boot loader then throw an exception if its
4528 // superclass is in package jdk.internal.reflect and its loader is not a
4529 // special reflection class loader
4530 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4531 assert(super->is_instance_klass(), "super is not instance klass");
4532 PackageEntry* super_package = super->package();
4533 if (super_package != NULL &&
4534 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4535 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4536 ResourceMark rm(THREAD);
4537 Exceptions::fthrow(
4538 THREAD_AND_LOCATION,
4539 vmSymbols::java_lang_IllegalAccessError(),
4540 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4541 this_klass->external_name(),
4542 this_klass->class_loader_data()->loader_name_and_id(),
4543 super->external_name());
4544 return;
4545 }
4546 }
4547
4548 Reflection::VerifyClassAccessResults vca_result =
4549 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4550 if (vca_result != Reflection::ACCESS_OK) {
4551 ResourceMark rm(THREAD);
4552 char* msg = Reflection::verify_class_access_msg(this_klass,
4553 InstanceKlass::cast(super),
4554 vca_result);
4555 if (msg == NULL) {
4556 bool same_module = (this_klass->module() == super->module());
4557 Exceptions::fthrow(
4558 THREAD_AND_LOCATION,
4559 vmSymbols::java_lang_IllegalAccessError(),
4560 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4561 this_klass->external_name(),
4562 super->is_abstract() ? "abstract " : "",
4563 super->external_name(),
4564 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4565 (same_module) ? "" : "; ",
4566 (same_module) ? "" : super->class_in_module_of_loader());
4567 } else {
4568 // Add additional message content.
4569 Exceptions::fthrow(
4570 THREAD_AND_LOCATION,
4571 vmSymbols::java_lang_IllegalAccessError(),
4572 "superclass access check failed: %s",
4573 msg);
4574 }
4575 }
4576 }
4577 }
4578
4579
4580 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4581 assert(this_klass != NULL, "invariant");
4582 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4583 const int lng = local_interfaces->length();
4584 for (int i = lng - 1; i >= 0; i--) {
4585 InstanceKlass* const k = local_interfaces->at(i);
4586 assert (k != NULL && k->is_interface(), "invalid interface");
4587 Reflection::VerifyClassAccessResults vca_result =
4588 Reflection::verify_class_access(this_klass, k, false);
4589 if (vca_result != Reflection::ACCESS_OK) {
4590 ResourceMark rm(THREAD);
4591 char* msg = Reflection::verify_class_access_msg(this_klass,
4592 k,
4593 vca_result);
4594 if (msg == NULL) {
4595 bool same_module = (this_klass->module() == k->module());
4596 Exceptions::fthrow(
4597 THREAD_AND_LOCATION,
4598 vmSymbols::java_lang_IllegalAccessError(),
4599 "class %s cannot access its superinterface %s (%s%s%s)",
4600 this_klass->external_name(),
4601 k->external_name(),
4602 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4603 (same_module) ? "" : "; ",
4604 (same_module) ? "" : k->class_in_module_of_loader());
4605 } else {
4606 // Add additional message content.
4607 Exceptions::fthrow(
4608 THREAD_AND_LOCATION,
4609 vmSymbols::java_lang_IllegalAccessError(),
4610 "superinterface check failed: %s",
4611 msg);
4612 }
4613 }
4614 }
4615 }
4616
4617
4618 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4619 assert(this_klass != NULL, "invariant");
4620 const Array<Method*>* const methods = this_klass->methods();
4621 const int num_methods = methods->length();
4622
4623 // go thru each method and check if it overrides a final method
4624 for (int index = 0; index < num_methods; index++) {
4625 const Method* const m = methods->at(index);
4626
4627 // skip private, static, and <init> methods
4628 if ((!m->is_private() && !m->is_static()) &&
4629 (m->name() != vmSymbols::object_initializer_name())) {
4630
4631 const Symbol* const name = m->name();
4632 const Symbol* const signature = m->signature();
4633 const Klass* k = this_klass->super();
4634 const Method* super_m = NULL;
4635 while (k != NULL) {
4636 // skip supers that don't have final methods.
4637 if (k->has_final_method()) {
4638 // lookup a matching method in the super class hierarchy
4639 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4640 if (super_m == NULL) {
4641 break; // didn't find any match; get out
4642 }
4643
4644 if (super_m->is_final() && !super_m->is_static() &&
4645 !super_m->access_flags().is_private()) {
4646 // matching method in super is final, and not static or private
4647 bool can_access = Reflection::verify_member_access(this_klass,
4648 super_m->method_holder(),
4649 super_m->method_holder(),
4650 super_m->access_flags(),
4651 false, false, CHECK);
4652 if (can_access) {
4653 // this class can access super final method and therefore override
4654 ResourceMark rm(THREAD);
4655 Exceptions::fthrow(THREAD_AND_LOCATION,
4656 vmSymbols::java_lang_VerifyError(),
4657 "class %s overrides final method %s.%s%s",
4658 this_klass->external_name(),
4659 super_m->method_holder()->external_name(),
4660 name->as_C_string(),
4661 signature->as_C_string()
4662 );
4663 return;
4664 }
4665 }
4666
4667 // continue to look from super_m's holder's super.
4668 k = super_m->method_holder()->super();
4669 continue;
4670 }
4671
4672 k = k->super();
4673 }
4674 }
4675 }
4676 }
4677
4678
4679 // assumes that this_klass is an interface
4680 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4681 assert(this_klass != NULL, "invariant");
4682 assert(this_klass->is_interface(), "not an interface");
4683 const Array<Method*>* methods = this_klass->methods();
4684 const int num_methods = methods->length();
4685
4686 for (int index = 0; index < num_methods; index++) {
4687 const Method* const m = methods->at(index);
4688 // if m is static and not the init method, throw a verify error
4689 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4690 ResourceMark rm(THREAD);
4691 Exceptions::fthrow(
4692 THREAD_AND_LOCATION,
4693 vmSymbols::java_lang_VerifyError(),
4694 "Illegal static method %s in interface %s",
4695 m->name()->as_C_string(),
4696 this_klass->external_name()
4697 );
4698 return;
4699 }
4700 }
4701 }
4702
4703 // utility methods for format checking
4704
4705 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4706 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4707 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4708 if (is_module) {
4709 ResourceMark rm(THREAD);
4710 Exceptions::fthrow(
4711 THREAD_AND_LOCATION,
4712 vmSymbols::java_lang_NoClassDefFoundError(),
4713 "%s is not a class because access_flag ACC_MODULE is set",
4714 _class_name->as_C_string());
4715 return;
4716 }
4717
4718 if (!_need_verify) { return; }
4719
4720 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4721 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4722 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4723 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4724 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4725 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4726 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4727
4728 if ((is_abstract && is_final) ||
4729 (is_interface && !is_abstract) ||
4730 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4731 (!is_interface && major_gte_15 && is_annotation)) {
4732 ResourceMark rm(THREAD);
4733 Exceptions::fthrow(
4734 THREAD_AND_LOCATION,
4735 vmSymbols::java_lang_ClassFormatError(),
4736 "Illegal class modifiers in class %s: 0x%X",
4737 _class_name->as_C_string(), flags
4738 );
4739 return;
4740 }
4741 }
4742
4743 static bool has_illegal_visibility(jint flags) {
4744 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4745 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4746 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4747
4748 return ((is_public && is_protected) ||
4749 (is_public && is_private) ||
4750 (is_protected && is_private));
4751 }
4752
4753 // A legal major_version.minor_version must be one of the following:
4754 //
4755 // Major_version = 45, any minor_version.
4756 // Major_version >= 46 and major_version <= current_major_version and minor_version = 0.
4757 // Major_version = current_major_version and minor_version = 65535 and --enable-preview is present.
4758 //
4759 static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4760 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4761 if (major != JAVA_MIN_SUPPORTED_VERSION) { // All 45.* are ok including 45.65535
4762 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4763 if (major != max_version) {
4764 ResourceMark rm(THREAD);
4765 Exceptions::fthrow(
4766 THREAD_AND_LOCATION,
4767 vmSymbols::java_lang_UnsupportedClassVersionError(),
4768 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4769 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4770 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4771 return;
4772 }
4773
4774 if (!Arguments::enable_preview()) {
4775 ResourceMark rm(THREAD);
4776 Exceptions::fthrow(
4777 THREAD_AND_LOCATION,
4778 vmSymbols::java_lang_UnsupportedClassVersionError(),
4779 "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4780 class_name->as_C_string(), major, minor);
4781 return;
4782 }
4783
4784 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4785 if (major > max_version) {
4786 ResourceMark rm(THREAD);
4787 Exceptions::fthrow(
4788 THREAD_AND_LOCATION,
4789 vmSymbols::java_lang_UnsupportedClassVersionError(),
4790 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4791 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4792 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4793 } else if (major < JAVA_MIN_SUPPORTED_VERSION) {
4794 ResourceMark rm(THREAD);
4795 Exceptions::fthrow(
4796 THREAD_AND_LOCATION,
4797 vmSymbols::java_lang_UnsupportedClassVersionError(),
4798 "%s (class file version %u.%u) was compiled with an invalid major version",
4799 class_name->as_C_string(), major, minor);
4800 } else if (minor != 0) {
4801 ResourceMark rm(THREAD);
4802 Exceptions::fthrow(
4803 THREAD_AND_LOCATION,
4804 vmSymbols::java_lang_UnsupportedClassVersionError(),
4805 "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4806 class_name->as_C_string(), major, minor);
4807 }
4808 }
4809 }
4810 }
4811
4812 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4813 bool is_interface,
4814 TRAPS) const {
4815 if (!_need_verify) { return; }
4816
4817 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4818 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4819 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4820 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4821 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4822 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4823 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4824 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4825 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4826
4827 bool is_illegal = false;
4828
4829 if (is_interface) {
4830 if (!is_public || !is_static || !is_final || is_private ||
4831 is_protected || is_volatile || is_transient ||
4832 (major_gte_15 && is_enum)) {
4833 is_illegal = true;
4834 }
4835 } else { // not interface
4836 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4837 is_illegal = true;
4838 }
4839 }
4840
4841 if (is_illegal) {
4842 ResourceMark rm(THREAD);
4843 Exceptions::fthrow(
4844 THREAD_AND_LOCATION,
4845 vmSymbols::java_lang_ClassFormatError(),
4846 "Illegal field modifiers in class %s: 0x%X",
4847 _class_name->as_C_string(), flags);
4848 return;
4849 }
4850 }
4851
4852 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4853 bool is_interface,
4854 const Symbol* name,
4855 TRAPS) const {
4856 if (!_need_verify) { return; }
4857
4858 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4859 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4860 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4861 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4862 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4863 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4864 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4865 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4866 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4867 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4868 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4869 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4870 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4871
4872 bool is_illegal = false;
4873
4874 if (is_interface) {
4875 if (major_gte_8) {
4876 // Class file version is JAVA_8_VERSION or later Methods of
4877 // interfaces may set any of the flags except ACC_PROTECTED,
4878 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4879 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4880 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4881 (is_native || is_protected || is_final || is_synchronized) ||
4882 // If a specific method of a class or interface has its
4883 // ACC_ABSTRACT flag set, it must not have any of its
4884 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4885 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4886 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4887 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4888 (is_abstract && (is_private || is_static || is_strict))) {
4889 is_illegal = true;
4890 }
4891 } else if (major_gte_15) {
4892 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4893 if (!is_public || is_private || is_protected || is_static || is_final ||
4894 is_synchronized || is_native || !is_abstract || is_strict) {
4895 is_illegal = true;
4896 }
4897 } else {
4898 // Class file version is pre-JAVA_1_5_VERSION
4899 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4900 is_illegal = true;
4901 }
4902 }
4903 } else { // not interface
4904 if (has_illegal_visibility(flags)) {
4905 is_illegal = true;
4906 } else {
4907 if (is_initializer) {
4908 if (is_static || is_final || is_synchronized || is_native ||
4909 is_abstract || (major_gte_15 && is_bridge)) {
4910 is_illegal = true;
4911 }
4912 } else { // not initializer
4913 if (is_abstract) {
4914 if ((is_final || is_native || is_private || is_static ||
4915 (major_gte_15 && (is_synchronized || is_strict)))) {
4916 is_illegal = true;
4917 }
4918 }
4919 }
4920 }
4921 }
4922
4923 if (is_illegal) {
4924 ResourceMark rm(THREAD);
4925 Exceptions::fthrow(
4926 THREAD_AND_LOCATION,
4927 vmSymbols::java_lang_ClassFormatError(),
4928 "Method %s in class %s has illegal modifiers: 0x%X",
4929 name->as_C_string(), _class_name->as_C_string(), flags);
4930 return;
4931 }
4932 }
4933
4934 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4935 int length,
4936 TRAPS) const {
4937 assert(_need_verify, "only called when _need_verify is true");
4938 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4939 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4940 }
4941 }
4942
4943 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4944 // In class names, '/' separates unqualified names. This is verified in this function also.
4945 // Method names also may not contain the characters '<' or '>', unless <init>
4946 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4947 // method. Because these names have been checked as special cases before
4948 // calling this method in verify_legal_method_name.
4949 //
4950 // This method is also called from the modular system APIs in modules.cpp
4951 // to verify the validity of module and package names.
4952 bool ClassFileParser::verify_unqualified_name(const char* name,
4953 unsigned int length,
4954 int type) {
4955 for (const char* p = name; p != name + length; p++) {
4956 switch(*p) {
4957 case '.':
4958 case ';':
4959 case '[':
4960 // do not permit '.', ';', or '['
4961 return false;
4962 case '/':
4963 // check for '//' or leading or trailing '/' which are not legal
4964 // unqualified name must not be empty
4965 if (type == ClassFileParser::LegalClass) {
4966 if (p == name || p+1 >= name+length || *(p+1) == '/') {
4967 return false;
4968 }
4969 } else {
4970 return false; // do not permit '/' unless it's class name
4971 }
4972 break;
4973 case '<':
4974 case '>':
4975 // do not permit '<' or '>' in method names
4976 if (type == ClassFileParser::LegalMethod) {
4977 return false;
4978 }
4979 }
4980 }
4981 return true;
4982 }
4983
4984 // Take pointer to a UTF8 byte string (not NUL-terminated).
4985 // Skip over the longest part of the string that could
4986 // be taken as a fieldname. Allow '/' if slash_ok is true.
4987 // Return a pointer to just past the fieldname.
4988 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4989 // being true, we saw consecutive slashes (meaning we were looking for a
4990 // qualified path but found something that was badly-formed).
4991 static const char* skip_over_field_name(const char* const name,
4992 bool slash_ok,
4993 unsigned int length) {
4994 const char* p;
4995 jboolean last_is_slash = false;
4996 jboolean not_first_ch = false;
4997
4998 for (p = name; p != name + length; not_first_ch = true) {
4999 const char* old_p = p;
5000 jchar ch = *p;
5001 if (ch < 128) {
5002 p++;
5003 // quick check for ascii
5004 if ((ch >= 'a' && ch <= 'z') ||
5005 (ch >= 'A' && ch <= 'Z') ||
5006 (ch == '_' || ch == '$') ||
5007 (not_first_ch && ch >= '0' && ch <= '9')) {
5008 last_is_slash = false;
5009 continue;
5010 }
5011 if (slash_ok && ch == '/') {
5012 if (last_is_slash) {
5013 return NULL; // Don't permit consecutive slashes
5014 }
5015 last_is_slash = true;
5016 continue;
5017 }
5018 }
5019 else {
5020 jint unicode_ch;
5021 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5022 p = tmp_p;
5023 last_is_slash = false;
5024 // Check if ch is Java identifier start or is Java identifier part
5025 // 4672820: call java.lang.Character methods directly without generating separate tables.
5026 EXCEPTION_MARK;
5027 // return value
5028 JavaValue result(T_BOOLEAN);
5029 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5030 JavaCallArguments args;
5031 args.push_int(unicode_ch);
5032
5033 if (not_first_ch) {
5034 // public static boolean isJavaIdentifierPart(char ch);
5035 JavaCalls::call_static(&result,
5036 SystemDictionary::Character_klass(),
5037 vmSymbols::isJavaIdentifierPart_name(),
5038 vmSymbols::int_bool_signature(),
5039 &args,
5040 THREAD);
5041 } else {
5042 // public static boolean isJavaIdentifierStart(char ch);
5043 JavaCalls::call_static(&result,
5044 SystemDictionary::Character_klass(),
5045 vmSymbols::isJavaIdentifierStart_name(),
5046 vmSymbols::int_bool_signature(),
5047 &args,
5048 THREAD);
5049 }
5050 if (HAS_PENDING_EXCEPTION) {
5051 CLEAR_PENDING_EXCEPTION;
5052 return NULL;
5053 }
5054 if(result.get_jboolean()) {
5055 continue;
5056 }
5057 }
5058 return (not_first_ch) ? old_p : NULL;
5059 }
5060 return (not_first_ch) ? p : NULL;
5061 }
5062
5063 // Take pointer to a UTF8 byte string (not NUL-terminated).
5064 // Skip over the longest part of the string that could
5065 // be taken as a field signature. Allow "void" if void_ok.
5066 // Return a pointer to just past the signature.
5067 // Return NULL if no legal signature is found.
5068 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5069 bool void_ok,
5070 unsigned int length,
5071 TRAPS) const {
5072 unsigned int array_dim = 0;
5073 while (length > 0) {
5074 switch (signature[0]) {
5075 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5076 case JVM_SIGNATURE_BOOLEAN:
5077 case JVM_SIGNATURE_BYTE:
5078 case JVM_SIGNATURE_CHAR:
5079 case JVM_SIGNATURE_SHORT:
5080 case JVM_SIGNATURE_INT:
5081 case JVM_SIGNATURE_FLOAT:
5082 case JVM_SIGNATURE_LONG:
5083 case JVM_SIGNATURE_DOUBLE:
5084 return signature + 1;
5085 case JVM_SIGNATURE_CLASS: {
5086 if (_major_version < JAVA_1_5_VERSION) {
5087 // Skip over the class name if one is there
5088 const char* const p = skip_over_field_name(signature + 1, true, --length);
5089
5090 // The next character better be a semicolon
5091 if (p && (p - signature) > 1 && p[0] == ';') {
5092 return p + 1;
5093 }
5094 }
5095 else {
5096 // Skip leading 'L' and ignore first appearance of ';'
5097 signature++;
5098 const char* c = (const char*) memchr(signature, ';', length - 1);
5099 // Format check signature
5100 if (c != NULL) {
5101 int newlen = c - (char*) signature;
5102 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5103 if (!legal) {
5104 classfile_parse_error("Class name contains illegal character "
5105 "in descriptor in class file %s",
5106 CHECK_0);
5107 return NULL;
5108 }
5109 return signature + newlen + 1;
5110 }
5111 }
5112 return NULL;
5113 }
5114 case JVM_SIGNATURE_ARRAY:
5115 array_dim++;
5116 if (array_dim > 255) {
5117 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5118 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5119 }
5120 // The rest of what's there better be a legal signature
5121 signature++;
5122 length--;
5123 void_ok = false;
5124 break;
5125 default:
5126 return NULL;
5127 }
5128 }
5129 return NULL;
5130 }
5131
5132 // Checks if name is a legal class name.
5133 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5134 if (!_need_verify || _relax_verify) { return; }
5135
5136 assert(name->refcount() > 0, "symbol must be kept alive");
5137 char* bytes = (char*)name->bytes();
5138 unsigned int length = name->utf8_length();
5139 bool legal = false;
5140
5141 if (length > 0) {
5142 const char* p;
5143 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5144 p = skip_over_field_signature(bytes, false, length, CHECK);
5145 legal = (p != NULL) && ((p - bytes) == (int)length);
5146 } else if (_major_version < JAVA_1_5_VERSION) {
5147 if (bytes[0] != '<') {
5148 p = skip_over_field_name(bytes, true, length);
5149 legal = (p != NULL) && ((p - bytes) == (int)length);
5150 }
5151 } else {
5152 // 4900761: relax the constraints based on JSR202 spec
5153 // Class names may be drawn from the entire Unicode character set.
5154 // Identifiers between '/' must be unqualified names.
5155 // The utf8 string has been verified when parsing cpool entries.
5156 legal = verify_unqualified_name(bytes, length, LegalClass);
5157 }
5158 }
5159 if (!legal) {
5160 ResourceMark rm(THREAD);
5161 assert(_class_name != NULL, "invariant");
5162 Exceptions::fthrow(
5163 THREAD_AND_LOCATION,
5164 vmSymbols::java_lang_ClassFormatError(),
5165 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5166 _class_name->as_C_string()
5167 );
5168 return;
5169 }
5170 }
5171
5172 // Checks if name is a legal field name.
5173 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5174 if (!_need_verify || _relax_verify) { return; }
5175
5176 char* bytes = (char*)name->bytes();
5177 unsigned int length = name->utf8_length();
5178 bool legal = false;
5179
5180 if (length > 0) {
5181 if (_major_version < JAVA_1_5_VERSION) {
5182 if (bytes[0] != '<') {
5183 const char* p = skip_over_field_name(bytes, false, length);
5184 legal = (p != NULL) && ((p - bytes) == (int)length);
5185 }
5186 } else {
5187 // 4881221: relax the constraints based on JSR202 spec
5188 legal = verify_unqualified_name(bytes, length, LegalField);
5189 }
5190 }
5191
5192 if (!legal) {
5193 ResourceMark rm(THREAD);
5194 assert(_class_name != NULL, "invariant");
5195 Exceptions::fthrow(
5196 THREAD_AND_LOCATION,
5197 vmSymbols::java_lang_ClassFormatError(),
5198 "Illegal field name \"%.*s\" in class %s", length, bytes,
5199 _class_name->as_C_string()
5200 );
5201 return;
5202 }
5203 }
5204
5205 // Checks if name is a legal method name.
5206 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5207 if (!_need_verify || _relax_verify) { return; }
5208
5209 assert(name != NULL, "method name is null");
5210 char* bytes = (char*)name->bytes();
5211 unsigned int length = name->utf8_length();
5212 bool legal = false;
5213
5214 if (length > 0) {
5215 if (bytes[0] == '<') {
5216 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5217 legal = true;
5218 }
5219 } else if (_major_version < JAVA_1_5_VERSION) {
5220 const char* p;
5221 p = skip_over_field_name(bytes, false, length);
5222 legal = (p != NULL) && ((p - bytes) == (int)length);
5223 } else {
5224 // 4881221: relax the constraints based on JSR202 spec
5225 legal = verify_unqualified_name(bytes, length, LegalMethod);
5226 }
5227 }
5228
5229 if (!legal) {
5230 ResourceMark rm(THREAD);
5231 assert(_class_name != NULL, "invariant");
5232 Exceptions::fthrow(
5233 THREAD_AND_LOCATION,
5234 vmSymbols::java_lang_ClassFormatError(),
5235 "Illegal method name \"%.*s\" in class %s", length, bytes,
5236 _class_name->as_C_string()
5237 );
5238 return;
5239 }
5240 }
5241
5242
5243 // Checks if signature is a legal field signature.
5244 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5245 const Symbol* signature,
5246 TRAPS) const {
5247 if (!_need_verify) { return; }
5248
5249 const char* const bytes = (const char* const)signature->bytes();
5250 const unsigned int length = signature->utf8_length();
5251 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5252
5253 if (p == NULL || (p - bytes) != (int)length) {
5254 throwIllegalSignature("Field", name, signature, CHECK);
5255 }
5256 }
5257
5258 // Checks if signature is a legal method signature.
5259 // Returns number of parameters
5260 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5261 const Symbol* signature,
5262 TRAPS) const {
5263 if (!_need_verify) {
5264 // make sure caller's args_size will be less than 0 even for non-static
5265 // method so it will be recomputed in compute_size_of_parameters().
5266 return -2;
5267 }
5268
5269 // Class initializers cannot have args for class format version >= 51.
5270 if (name == vmSymbols::class_initializer_name() &&
5271 signature != vmSymbols::void_method_signature() &&
5272 _major_version >= JAVA_7_VERSION) {
5273 throwIllegalSignature("Method", name, signature, CHECK_0);
5274 return 0;
5275 }
5276
5277 unsigned int args_size = 0;
5278 const char* p = (const char*)signature->bytes();
5279 unsigned int length = signature->utf8_length();
5280 const char* nextp;
5281
5282 // The first character must be a '('
5283 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5284 length--;
5285 // Skip over legal field signatures
5286 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5287 while ((length > 0) && (nextp != NULL)) {
5288 args_size++;
5289 if (p[0] == 'J' || p[0] == 'D') {
5290 args_size++;
5291 }
5292 length -= nextp - p;
5293 p = nextp;
5294 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5295 }
5296 // The first non-signature thing better be a ')'
5297 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5298 length--;
5299 if (name->utf8_length() > 0 && name->char_at(0) == '<') {
5300 // All internal methods must return void
5301 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5302 return args_size;
5303 }
5304 } else {
5305 // Now we better just have a return value
5306 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5307 if (nextp && ((int)length == (nextp - p))) {
5308 return args_size;
5309 }
5310 }
5311 }
5312 }
5313 // Report error
5314 throwIllegalSignature("Method", name, signature, CHECK_0);
5315 return 0;
5316 }
5317
5318 int ClassFileParser::static_field_size() const {
5319 assert(_field_info != NULL, "invariant");
5320 return _field_info->static_field_size;
5321 }
5322
5323 int ClassFileParser::total_oop_map_count() const {
5324 assert(_field_info != NULL, "invariant");
5325 return _field_info->total_oop_map_count;
5326 }
5327
5328 jint ClassFileParser::layout_size() const {
5329 assert(_field_info != NULL, "invariant");
5330 return _field_info->instance_size;
5331 }
5332
5333 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5334 const Array<Method*>* methods) {
5335 assert(ik != NULL, "invariant");
5336 assert(methods != NULL, "invariant");
5337
5338 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5339 // (We used to do this lazily, but now we query it in Rewriter,
5340 // which is eagerly done for every method, so we might as well do it now,
5341 // when everything is fresh in memory.)
5342 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5343
5344 if (klass_id != vmSymbols::NO_SID) {
5345 for (int j = 0; j < methods->length(); ++j) {
5346 Method* method = methods->at(j);
5347 method->init_intrinsic_id();
5348
5349 if (CheckIntrinsics) {
5350 // Check if an intrinsic is defined for method 'method',
5351 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5352 if (method->intrinsic_id() != vmIntrinsics::_none &&
5353 !method->intrinsic_candidate()) {
5354 tty->print("Compiler intrinsic is defined for method [%s], "
5355 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5356 method->name_and_sig_as_C_string(),
5357 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5358 );
5359 tty->cr();
5360 DEBUG_ONLY(vm_exit(1));
5361 }
5362 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5363 // but there is no intrinsic available for it.
5364 if (method->intrinsic_candidate() &&
5365 method->intrinsic_id() == vmIntrinsics::_none) {
5366 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5367 "but no compiler intrinsic is defined for the method.%s",
5368 method->name_and_sig_as_C_string(),
5369 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5370 );
5371 tty->cr();
5372 DEBUG_ONLY(vm_exit(1));
5373 }
5374 }
5375 } // end for
5376
5377 #ifdef ASSERT
5378 if (CheckIntrinsics) {
5379 // Check for orphan methods in the current class. A method m
5380 // of a class C is orphan if an intrinsic is defined for method m,
5381 // but class C does not declare m.
5382 // The check is potentially expensive, therefore it is available
5383 // only in debug builds.
5384
5385 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5386 if (vmIntrinsics::_compiledLambdaForm == id) {
5387 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5388 // generated for the JVM from a LambdaForm and therefore no method
5389 // is defined for it.
5390 continue;
5391 }
5392
5393 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5394 // Check if the current class contains a method with the same
5395 // name, flags, signature.
5396 bool match = false;
5397 for (int j = 0; j < methods->length(); ++j) {
5398 const Method* method = methods->at(j);
5399 if (method->intrinsic_id() == id) {
5400 match = true;
5401 break;
5402 }
5403 }
5404
5405 if (!match) {
5406 char buf[1000];
5407 tty->print("Compiler intrinsic is defined for method [%s], "
5408 "but the method is not available in class [%s].%s",
5409 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5410 buf, sizeof(buf)),
5411 ik->name()->as_C_string(),
5412 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5413 );
5414 tty->cr();
5415 DEBUG_ONLY(vm_exit(1));
5416 }
5417 }
5418 } // end for
5419 } // CheckIntrinsics
5420 #endif // ASSERT
5421 }
5422 }
5423
5424 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5425 if (_klass != NULL) {
5426 return _klass;
5427 }
5428
5429 InstanceKlass* const ik =
5430 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5431
5432 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5433
5434 assert(_klass == ik, "invariant");
5435
5436
5437 if (ik->should_store_fingerprint()) {
5438 ik->store_fingerprint(_stream->compute_fingerprint());
5439 }
5440
5441 ik->set_has_passed_fingerprint_check(false);
5442 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5443 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5444 uint64_t fp = ik->has_stored_fingerprint() ? ik->get_stored_fingerprint() : _stream->compute_fingerprint();
5445 if (aot_fp != 0 && aot_fp == fp) {
5446 // This class matches with a class saved in an AOT library
5447 ik->set_has_passed_fingerprint_check(true);
5448 } else {
5449 ResourceMark rm;
5450 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5451 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5452 }
5453 }
5454
5455 return ik;
5456 }
5457
5458 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5459 assert(ik != NULL, "invariant");
5460
5461 // Set name and CLD before adding to CLD
5462 ik->set_class_loader_data(_loader_data);
5463 ik->set_name(_class_name);
5464
5465 // Add all classes to our internal class loader list here,
5466 // including classes in the bootstrap (NULL) class loader.
5467 const bool publicize = !is_internal();
5468
5469 _loader_data->add_class(ik, publicize);
5470
5471 set_klass_to_deallocate(ik);
5472
5473 assert(_field_info != NULL, "invariant");
5474 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5475 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5476 "sanity");
5477
5478 assert(ik->is_instance_klass(), "sanity");
5479 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5480
5481 // Fill in information already parsed
5482 ik->set_should_verify_class(_need_verify);
5483
5484 // Not yet: supers are done below to support the new subtype-checking fields
5485 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5486 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5487 assert(_fac != NULL, "invariant");
5488 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5489
5490 // this transfers ownership of a lot of arrays from
5491 // the parser onto the InstanceKlass*
5492 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5493
5494 // note that is not safe to use the fields in the parser from this point on
5495 assert(NULL == _cp, "invariant");
5496 assert(NULL == _fields, "invariant");
5497 assert(NULL == _methods, "invariant");
5498 assert(NULL == _inner_classes, "invariant");
5499 assert(NULL == _nest_members, "invariant");
5500 assert(NULL == _local_interfaces, "invariant");
5501 assert(NULL == _combined_annotations, "invariant");
5502
5503 if (_has_final_method) {
5504 ik->set_has_final_method();
5505 }
5506
5507 ik->copy_method_ordering(_method_ordering, CHECK);
5508 // The InstanceKlass::_methods_jmethod_ids cache
5509 // is managed on the assumption that the initial cache
5510 // size is equal to the number of methods in the class. If
5511 // that changes, then InstanceKlass::idnum_can_increment()
5512 // has to be changed accordingly.
5513 ik->set_initial_method_idnum(ik->methods()->length());
5514
5515 ik->set_this_class_index(_this_class_index);
5516
5517 if (is_unsafe_anonymous()) {
5518 // _this_class_index is a CONSTANT_Class entry that refers to this
5519 // anonymous class itself. If this class needs to refer to its own methods or
5520 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5521 // _this_class_index. However, because this class is anonymous (it's
5522 // not stored in SystemDictionary), _this_class_index cannot be resolved
5523 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5524 // Therefore, we must eagerly resolve _this_class_index now.
5525 ik->constants()->klass_at_put(_this_class_index, ik);
5526 }
5527
5528 ik->set_minor_version(_minor_version);
5529 ik->set_major_version(_major_version);
5530 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5531 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5532
5533 if (_unsafe_anonymous_host != NULL) {
5534 assert (ik->is_unsafe_anonymous(), "should be the same");
5535 ik->set_unsafe_anonymous_host(_unsafe_anonymous_host);
5536 }
5537
5538 // Set PackageEntry for this_klass
5539 oop cl = ik->class_loader();
5540 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5541 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5542 ik->set_package(cld, CHECK);
5543
5544 const Array<Method*>* const methods = ik->methods();
5545 assert(methods != NULL, "invariant");
5546 const int methods_len = methods->length();
5547
5548 check_methods_for_intrinsics(ik, methods);
5549
5550 // Fill in field values obtained by parse_classfile_attributes
5551 if (_parsed_annotations->has_any_annotations()) {
5552 _parsed_annotations->apply_to(ik);
5553 }
5554
5555 apply_parsed_class_attributes(ik);
5556
5557 // Miranda methods
5558 if ((_num_miranda_methods > 0) ||
5559 // if this class introduced new miranda methods or
5560 (_super_klass != NULL && _super_klass->has_miranda_methods())
5561 // super class exists and this class inherited miranda methods
5562 ) {
5563 ik->set_has_miranda_methods(); // then set a flag
5564 }
5565
5566 // Fill in information needed to compute superclasses.
5567 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5568 ik->set_transitive_interfaces(_transitive_interfaces);
5569 _transitive_interfaces = NULL;
5570
5571 // Initialize itable offset tables
5572 klassItable::setup_itable_offset_table(ik);
5573
5574 // Compute transitive closure of interfaces this class implements
5575 // Do final class setup
5576 fill_oop_maps(ik,
5577 _field_info->nonstatic_oop_map_count,
5578 _field_info->nonstatic_oop_offsets,
5579 _field_info->nonstatic_oop_counts);
5580
5581 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5582 set_precomputed_flags(ik);
5583
5584 // check if this class can access its super class
5585 check_super_class_access(ik, CHECK);
5586
5587 // check if this class can access its superinterfaces
5588 check_super_interface_access(ik, CHECK);
5589
5590 // check if this class overrides any final method
5591 check_final_method_override(ik, CHECK);
5592
5593 // reject static interface methods prior to Java 8
5594 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5595 check_illegal_static_method(ik, CHECK);
5596 }
5597
5598 // Obtain this_klass' module entry
5599 ModuleEntry* module_entry = ik->module();
5600 assert(module_entry != NULL, "module_entry should always be set");
5601
5602 // Obtain java.lang.Module
5603 Handle module_handle(THREAD, module_entry->module());
5604
5605 // Allocate mirror and initialize static fields
5606 // The create_mirror() call will also call compute_modifiers()
5607 java_lang_Class::create_mirror(ik,
5608 Handle(THREAD, _loader_data->class_loader()),
5609 module_handle,
5610 _protection_domain,
5611 CHECK);
5612
5613 assert(_all_mirandas != NULL, "invariant");
5614
5615 // Generate any default methods - default methods are public interface methods
5616 // that have a default implementation. This is new with Java 8.
5617 if (_has_nonstatic_concrete_methods) {
5618 DefaultMethods::generate_default_methods(ik,
5619 _all_mirandas,
5620 CHECK);
5621 }
5622
5623 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5624 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5625 !module_entry->has_default_read_edges()) {
5626 if (!module_entry->set_has_default_read_edges()) {
5627 // We won a potential race
5628 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5629 }
5630 }
5631
5632 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5633
5634 if (!is_internal()) {
5635 if (log_is_enabled(Info, class, load)) {
5636 ResourceMark rm;
5637 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5638 ik->print_class_load_logging(_loader_data, module_name, _stream);
5639 }
5640
5641 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5642 ik->major_version() != JAVA_MIN_SUPPORTED_VERSION &&
5643 log_is_enabled(Info, class, preview)) {
5644 ResourceMark rm;
5645 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5646 ik->external_name(), ik->major_version());
5647 }
5648
5649 if (log_is_enabled(Debug, class, resolve)) {
5650 ResourceMark rm;
5651 // print out the superclass.
5652 const char * from = ik->external_name();
5653 if (ik->java_super() != NULL) {
5654 log_debug(class, resolve)("%s %s (super)",
5655 from,
5656 ik->java_super()->external_name());
5657 }
5658 // print out each of the interface classes referred to by this class.
5659 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5660 if (local_interfaces != NULL) {
5661 const int length = local_interfaces->length();
5662 for (int i = 0; i < length; i++) {
5663 const InstanceKlass* const k = local_interfaces->at(i);
5664 const char * to = k->external_name();
5665 log_debug(class, resolve)("%s %s (interface)", from, to);
5666 }
5667 }
5668 }
5669 }
5670
5671 JFR_ONLY(INIT_ID(ik);)
5672
5673 // If we reach here, all is well.
5674 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5675 // in order for it to not be destroyed in the ClassFileParser destructor.
5676 set_klass_to_deallocate(NULL);
5677
5678 // it's official
5679 set_klass(ik);
5680
5681 debug_only(ik->verify();)
5682 }
5683
5684 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5685 // Decrement the refcount in the old name, since we're clobbering it.
5686 _class_name->decrement_refcount();
5687
5688 _class_name = new_class_name;
5689 // Increment the refcount of the new name.
5690 // Now the ClassFileParser owns this name and will decrement in
5691 // the destructor.
5692 _class_name->increment_refcount();
5693 }
5694
5695
5696 // For an unsafe anonymous class that is in the unnamed package, move it to its host class's
5697 // package by prepending its host class's package name to its class name and setting
5698 // its _class_name field.
5699 void ClassFileParser::prepend_host_package_name(const InstanceKlass* unsafe_anonymous_host, TRAPS) {
5700 ResourceMark rm(THREAD);
5701 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5702 "Unsafe anonymous class should not be in a package");
5703 const char* host_pkg_name =
5704 ClassLoader::package_from_name(unsafe_anonymous_host->name()->as_C_string(), NULL);
5705
5706 if (host_pkg_name != NULL) {
5707 int host_pkg_len = (int)strlen(host_pkg_name);
5708 int class_name_len = _class_name->utf8_length();
5709 int symbol_len = host_pkg_len + 1 + class_name_len;
5710 char* new_anon_name = NEW_RESOURCE_ARRAY(char, symbol_len + 1);
5711 int n = os::snprintf(new_anon_name, symbol_len + 1, "%s/%.*s",
5712 host_pkg_name, class_name_len, _class_name->base());
5713 assert(n == symbol_len, "Unexpected number of characters in string");
5714
5715 // Decrement old _class_name to avoid leaking.
5716 _class_name->decrement_refcount();
5717
5718 // Create a symbol and update the anonymous class name.
5719 // The new class name is created with a refcount of one. When installed into the InstanceKlass,
5720 // it'll be two and when the ClassFileParser destructor runs, it'll go back to one and get deleted
5721 // when the class is unloaded.
5722 _class_name = SymbolTable::new_symbol(new_anon_name, symbol_len, CHECK);
5723 }
5724 }
5725
5726 // If the host class and the anonymous class are in the same package then do
5727 // nothing. If the anonymous class is in the unnamed package then move it to its
5728 // host's package. If the classes are in different packages then throw an IAE
5729 // exception.
5730 void ClassFileParser::fix_unsafe_anonymous_class_name(TRAPS) {
5731 assert(_unsafe_anonymous_host != NULL, "Expected an unsafe anonymous class");
5732
5733 const jbyte* anon_last_slash = UTF8::strrchr((const jbyte*)_class_name->base(),
5734 _class_name->utf8_length(), '/');
5735 if (anon_last_slash == NULL) { // Unnamed package
5736 prepend_host_package_name(_unsafe_anonymous_host, CHECK);
5737 } else {
5738 if (!_unsafe_anonymous_host->is_same_class_package(_unsafe_anonymous_host->class_loader(), _class_name)) {
5739 ResourceMark rm(THREAD);
5740 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5741 err_msg("Host class %s and anonymous class %s are in different packages",
5742 _unsafe_anonymous_host->name()->as_C_string(), _class_name->as_C_string()));
5743 }
5744 }
5745 }
5746
5747 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5748 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5749 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5750 bool need_verify =
5751 // verifyAll
5752 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5753 // verifyRemote
5754 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5755 return !need_verify;
5756 }
5757
5758 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5759 Symbol* name,
5760 ClassLoaderData* loader_data,
5761 Handle protection_domain,
5762 const InstanceKlass* unsafe_anonymous_host,
5763 GrowableArray<Handle>* cp_patches,
5764 Publicity pub_level,
5765 TRAPS) :
5766 _stream(stream),
5767 _requested_name(name),
5768 _class_name(NULL),
5769 _loader_data(loader_data),
5770 _unsafe_anonymous_host(unsafe_anonymous_host),
5771 _cp_patches(cp_patches),
5772 _num_patched_klasses(0),
5773 _max_num_patched_klasses(0),
5774 _orig_cp_size(0),
5775 _first_patched_klass_resolved_index(0),
5776 _super_klass(),
5777 _cp(NULL),
5778 _fields(NULL),
5779 _methods(NULL),
5780 _inner_classes(NULL),
5781 _nest_members(NULL),
5782 _nest_host(0),
5783 _local_interfaces(NULL),
5784 _transitive_interfaces(NULL),
5785 _combined_annotations(NULL),
5786 _annotations(NULL),
5787 _type_annotations(NULL),
5788 _fields_annotations(NULL),
5789 _fields_type_annotations(NULL),
5790 _klass(NULL),
5791 _klass_to_deallocate(NULL),
5792 _parsed_annotations(NULL),
5793 _fac(NULL),
5794 _field_info(NULL),
5795 _method_ordering(NULL),
5796 _all_mirandas(NULL),
5797 _vtable_size(0),
5798 _itable_size(0),
5799 _num_miranda_methods(0),
5800 _rt(REF_NONE),
5801 _protection_domain(protection_domain),
5802 _access_flags(),
5803 _pub_level(pub_level),
5804 _bad_constant_seen(0),
5805 _synthetic_flag(false),
5806 _sde_length(false),
5807 _sde_buffer(NULL),
5808 _sourcefile_index(0),
5809 _generic_signature_index(0),
5810 _major_version(0),
5811 _minor_version(0),
5812 _this_class_index(0),
5813 _super_class_index(0),
5814 _itfs_len(0),
5815 _java_fields_count(0),
5816 _need_verify(false),
5817 _relax_verify(false),
5818 _has_nonstatic_concrete_methods(false),
5819 _declares_nonstatic_concrete_methods(false),
5820 _has_final_method(false),
5821 _has_finalizer(false),
5822 _has_empty_finalizer(false),
5823 _has_vanilla_constructor(false),
5824 _max_bootstrap_specifier_index(-1) {
5825
5826 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5827 _class_name->increment_refcount();
5828
5829 assert(THREAD->is_Java_thread(), "invariant");
5830 assert(_loader_data != NULL, "invariant");
5831 assert(stream != NULL, "invariant");
5832 assert(_stream != NULL, "invariant");
5833 assert(_stream->buffer() == _stream->current(), "invariant");
5834 assert(_class_name != NULL, "invariant");
5835 assert(0 == _access_flags.as_int(), "invariant");
5836
5837 // Figure out whether we can skip format checking (matching classic VM behavior)
5838 if (DumpSharedSpaces) {
5839 // verify == true means it's a 'remote' class (i.e., non-boot class)
5840 // Verification decision is based on BytecodeVerificationRemote flag
5841 // for those classes.
5842 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5843 BytecodeVerificationLocal;
5844 }
5845 else {
5846 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5847 stream->need_verify());
5848 }
5849 if (_cp_patches != NULL) {
5850 int len = _cp_patches->length();
5851 for (int i=0; i<len; i++) {
5852 if (has_cp_patch_at(i)) {
5853 Handle patch = cp_patch_at(i);
5854 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5855 // We need to append the names of the patched classes to the end of the constant pool,
5856 // because a patched class may have a Utf8 name that's not already included in the
5857 // original constant pool. These class names are used when patch_constant_pool()
5858 // calls patch_class().
5859 //
5860 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5861 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5862 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5863 _max_num_patched_klasses++;
5864 }
5865 }
5866 }
5867 }
5868
5869 // synch back verification state to stream
5870 stream->set_verify(_need_verify);
5871
5872 // Check if verification needs to be relaxed for this class file
5873 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5874 _relax_verify = relax_format_check_for(_loader_data);
5875
5876 parse_stream(stream, CHECK);
5877
5878 post_process_parsed_stream(stream, _cp, CHECK);
5879 }
5880
5881 void ClassFileParser::clear_class_metadata() {
5882 // metadata created before the instance klass is created. Must be
5883 // deallocated if classfile parsing returns an error.
5884 _cp = NULL;
5885 _fields = NULL;
5886 _methods = NULL;
5887 _inner_classes = NULL;
5888 _nest_members = NULL;
5889 _local_interfaces = NULL;
5890 _combined_annotations = NULL;
5891 _annotations = _type_annotations = NULL;
5892 _fields_annotations = _fields_type_annotations = NULL;
5893 }
5894
5895 // Destructor to clean up
5896 ClassFileParser::~ClassFileParser() {
5897 _class_name->decrement_refcount();
5898
5899 if (_cp != NULL) {
5900 MetadataFactory::free_metadata(_loader_data, _cp);
5901 }
5902 if (_fields != NULL) {
5903 MetadataFactory::free_array<u2>(_loader_data, _fields);
5904 }
5905
5906 if (_methods != NULL) {
5907 // Free methods
5908 InstanceKlass::deallocate_methods(_loader_data, _methods);
5909 }
5910
5911 // beware of the Universe::empty_blah_array!!
5912 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5913 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5914 }
5915
5916 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
5917 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5918 }
5919
5920 // Free interfaces
5921 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5922 _local_interfaces, _transitive_interfaces);
5923
5924 if (_combined_annotations != NULL) {
5925 // After all annotations arrays have been created, they are installed into the
5926 // Annotations object that will be assigned to the InstanceKlass being created.
5927
5928 // Deallocate the Annotations object and the installed annotations arrays.
5929 _combined_annotations->deallocate_contents(_loader_data);
5930
5931 // If the _combined_annotations pointer is non-NULL,
5932 // then the other annotations fields should have been cleared.
5933 assert(_annotations == NULL, "Should have been cleared");
5934 assert(_type_annotations == NULL, "Should have been cleared");
5935 assert(_fields_annotations == NULL, "Should have been cleared");
5936 assert(_fields_type_annotations == NULL, "Should have been cleared");
5937 } else {
5938 // If the annotations arrays were not installed into the Annotations object,
5939 // then they have to be deallocated explicitly.
5940 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5941 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5942 Annotations::free_contents(_loader_data, _fields_annotations);
5943 Annotations::free_contents(_loader_data, _fields_type_annotations);
5944 }
5945
5946 clear_class_metadata();
5947 _transitive_interfaces = NULL;
5948
5949 // deallocate the klass if already created. Don't directly deallocate, but add
5950 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5951 // at a safepoint.
5952 if (_klass_to_deallocate != NULL) {
5953 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5954 }
5955 }
5956
5957 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5958 TRAPS) {
5959
5960 assert(stream != NULL, "invariant");
5961 assert(_class_name != NULL, "invariant");
5962
5963 // BEGIN STREAM PARSING
5964 stream->guarantee_more(8, CHECK); // magic, major, minor
5965 // Magic value
5966 const u4 magic = stream->get_u4_fast();
5967 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5968 "Incompatible magic value %u in class file %s",
5969 magic, CHECK);
5970
5971 // Version numbers
5972 _minor_version = stream->get_u2_fast();
5973 _major_version = stream->get_u2_fast();
5974
5975 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5976 ResourceMark rm;
5977 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5978 _major_version, _minor_version, _class_name->as_C_string());
5979 Exceptions::fthrow(
5980 THREAD_AND_LOCATION,
5981 vmSymbols::java_lang_UnsupportedClassVersionError(),
5982 "Unsupported major.minor version for dump time %u.%u",
5983 _major_version,
5984 _minor_version);
5985 }
5986
5987 // Check version numbers - we check this even with verifier off
5988 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
5989
5990 stream->guarantee_more(3, CHECK); // length, first cp tag
5991 u2 cp_size = stream->get_u2_fast();
5992
5993 guarantee_property(
5994 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5995 cp_size, CHECK);
5996
5997 _orig_cp_size = cp_size;
5998 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
5999 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6000 }
6001 cp_size += _max_num_patched_klasses;
6002
6003 _cp = ConstantPool::allocate(_loader_data,
6004 cp_size,
6005 CHECK);
6006
6007 ConstantPool* const cp = _cp;
6008
6009 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6010
6011 assert(cp_size == (const u2)cp->length(), "invariant");
6012
6013 // ACCESS FLAGS
6014 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6015
6016 // Access flags
6017 jint flags;
6018 // JVM_ACC_MODULE is defined in JDK-9 and later.
6019 if (_major_version >= JAVA_9_VERSION) {
6020 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
6021 } else {
6022 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
6023 }
6024
6025 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6026 // Set abstract bit for old class files for backward compatibility
6027 flags |= JVM_ACC_ABSTRACT;
6028 }
6029
6030 verify_legal_class_modifiers(flags, CHECK);
6031
6032 short bad_constant = class_bad_constant_seen();
6033 if (bad_constant != 0) {
6034 // Do not throw CFE until after the access_flags are checked because if
6035 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6036 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6037 }
6038
6039 _access_flags.set_flags(flags);
6040
6041 // This class and superclass
6042 _this_class_index = stream->get_u2_fast();
6043 check_property(
6044 valid_cp_range(_this_class_index, cp_size) &&
6045 cp->tag_at(_this_class_index).is_unresolved_klass(),
6046 "Invalid this class index %u in constant pool in class file %s",
6047 _this_class_index, CHECK);
6048
6049 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6050 assert(class_name_in_cp != NULL, "class_name can't be null");
6051
6052 // Update _class_name to reflect the name in the constant pool
6053 update_class_name(class_name_in_cp);
6054
6055 // Don't need to check whether this class name is legal or not.
6056 // It has been checked when constant pool is parsed.
6057 // However, make sure it is not an array type.
6058 if (_need_verify) {
6059 guarantee_property(_class_name->char_at(0) != JVM_SIGNATURE_ARRAY,
6060 "Bad class name in class file %s",
6061 CHECK);
6062 }
6063
6064 // Checks if name in class file matches requested name
6065 if (_requested_name != NULL && _requested_name != _class_name) {
6066 ResourceMark rm(THREAD);
6067 Exceptions::fthrow(
6068 THREAD_AND_LOCATION,
6069 vmSymbols::java_lang_NoClassDefFoundError(),
6070 "%s (wrong name: %s)",
6071 _class_name->as_C_string(),
6072 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6073 );
6074 return;
6075 }
6076
6077 // if this is an anonymous class fix up its name if it's in the unnamed
6078 // package. Otherwise, throw IAE if it is in a different package than
6079 // its host class.
6080 if (_unsafe_anonymous_host != NULL) {
6081 fix_unsafe_anonymous_class_name(CHECK);
6082 }
6083
6084 // Verification prevents us from creating names with dots in them, this
6085 // asserts that that's the case.
6086 assert(is_internal_format(_class_name), "external class name format used internally");
6087
6088 if (!is_internal()) {
6089 LogTarget(Debug, class, preorder) lt;
6090 if (lt.is_enabled()){
6091 ResourceMark rm(THREAD);
6092 LogStream ls(lt);
6093 ls.print("%s", _class_name->as_klass_external_name());
6094 if (stream->source() != NULL) {
6095 ls.print(" source: %s", stream->source());
6096 }
6097 ls.cr();
6098 }
6099
6100 #if INCLUDE_CDS
6101 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6102 if (!ClassLoader::has_jrt_entry()) {
6103 warning("DumpLoadedClassList and CDS are not supported in exploded build");
6104 DumpLoadedClassList = NULL;
6105 } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6106 _unsafe_anonymous_host == NULL) {
6107 // Only dump the classes that can be stored into CDS archive.
6108 // Unsafe anonymous classes such as generated LambdaForm classes are also not included.
6109 oop class_loader = _loader_data->class_loader();
6110 ResourceMark rm(THREAD);
6111 bool skip = false;
6112 if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6113 // For the boot and platform class loaders, skip classes that are not found in the
6114 // java runtime image, such as those found in the --patch-module entries.
6115 // These classes can't be loaded from the archive during runtime.
6116 if (!ClassLoader::is_modules_image(stream->source()) && strncmp(stream->source(), "jrt:", 4) != 0) {
6117 skip = true;
6118 }
6119
6120 if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6121 // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6122 // as they can be loaded from the archive during runtime.
6123 skip = false;
6124 }
6125 }
6126 if (skip) {
6127 tty->print_cr("skip writing class %s from source %s to classlist file",
6128 _class_name->as_C_string(), stream->source());
6129 } else {
6130 classlist_file->print_cr("%s", _class_name->as_C_string());
6131 classlist_file->flush();
6132 }
6133 }
6134 }
6135 #endif
6136 }
6137
6138 // SUPERKLASS
6139 _super_class_index = stream->get_u2_fast();
6140 _super_klass = parse_super_class(cp,
6141 _super_class_index,
6142 _need_verify,
6143 CHECK);
6144
6145 // Interfaces
6146 _itfs_len = stream->get_u2_fast();
6147 parse_interfaces(stream,
6148 _itfs_len,
6149 cp,
6150 &_has_nonstatic_concrete_methods,
6151 CHECK);
6152
6153 assert(_local_interfaces != NULL, "invariant");
6154
6155 // Fields (offsets are filled in later)
6156 _fac = new FieldAllocationCount();
6157 parse_fields(stream,
6158 _access_flags.is_interface(),
6159 _fac,
6160 cp,
6161 cp_size,
6162 &_java_fields_count,
6163 CHECK);
6164
6165 assert(_fields != NULL, "invariant");
6166
6167 // Methods
6168 AccessFlags promoted_flags;
6169 parse_methods(stream,
6170 _access_flags.is_interface(),
6171 &promoted_flags,
6172 &_has_final_method,
6173 &_declares_nonstatic_concrete_methods,
6174 CHECK);
6175
6176 assert(_methods != NULL, "invariant");
6177
6178 // promote flags from parse_methods() to the klass' flags
6179 _access_flags.add_promoted_flags(promoted_flags.as_int());
6180
6181 if (_declares_nonstatic_concrete_methods) {
6182 _has_nonstatic_concrete_methods = true;
6183 }
6184
6185 // Additional attributes/annotations
6186 _parsed_annotations = new ClassAnnotationCollector();
6187 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6188
6189 assert(_inner_classes != NULL, "invariant");
6190
6191 // Finalize the Annotations metadata object,
6192 // now that all annotation arrays have been created.
6193 create_combined_annotations(CHECK);
6194
6195 // Make sure this is the end of class file stream
6196 guarantee_property(stream->at_eos(),
6197 "Extra bytes at the end of class file %s",
6198 CHECK);
6199
6200 // all bytes in stream read and parsed
6201 }
6202
6203 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6204 ConstantPool* cp,
6205 TRAPS) {
6206 assert(stream != NULL, "invariant");
6207 assert(stream->at_eos(), "invariant");
6208 assert(cp != NULL, "invariant");
6209 assert(_loader_data != NULL, "invariant");
6210
6211 if (_class_name == vmSymbols::java_lang_Object()) {
6212 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6213 "java.lang.Object cannot implement an interface in class file %s",
6214 CHECK);
6215 }
6216 // We check super class after class file is parsed and format is checked
6217 if (_super_class_index > 0 && NULL ==_super_klass) {
6218 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6219 if (_access_flags.is_interface()) {
6220 // Before attempting to resolve the superclass, check for class format
6221 // errors not checked yet.
6222 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6223 "Interfaces must have java.lang.Object as superclass in class file %s",
6224 CHECK);
6225 }
6226 Handle loader(THREAD, _loader_data->class_loader());
6227 _super_klass = (const InstanceKlass*)
6228 SystemDictionary::resolve_super_or_fail(_class_name,
6229 super_class_name,
6230 loader,
6231 _protection_domain,
6232 true,
6233 CHECK);
6234 }
6235
6236 if (_super_klass != NULL) {
6237 if (_super_klass->has_nonstatic_concrete_methods()) {
6238 _has_nonstatic_concrete_methods = true;
6239 }
6240
6241 if (_super_klass->is_interface()) {
6242 ResourceMark rm(THREAD);
6243 Exceptions::fthrow(
6244 THREAD_AND_LOCATION,
6245 vmSymbols::java_lang_IncompatibleClassChangeError(),
6246 "class %s has interface %s as super class",
6247 _class_name->as_klass_external_name(),
6248 _super_klass->external_name()
6249 );
6250 return;
6251 }
6252 // Make sure super class is not final
6253 if (_super_klass->is_final()) {
6254 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6255 }
6256 }
6257
6258 // Compute the transitive list of all unique interfaces implemented by this class
6259 _transitive_interfaces =
6260 compute_transitive_interfaces(_super_klass,
6261 _local_interfaces,
6262 _loader_data,
6263 CHECK);
6264
6265 assert(_transitive_interfaces != NULL, "invariant");
6266
6267 // sort methods
6268 _method_ordering = sort_methods(_methods);
6269
6270 _all_mirandas = new GrowableArray<Method*>(20);
6271
6272 Handle loader(THREAD, _loader_data->class_loader());
6273 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6274 &_num_miranda_methods,
6275 _all_mirandas,
6276 _super_klass,
6277 _methods,
6278 _access_flags,
6279 _major_version,
6280 loader,
6281 _class_name,
6282 _local_interfaces,
6283 CHECK);
6284
6285 // Size of Java itable (in words)
6286 _itable_size = _access_flags.is_interface() ? 0 :
6287 klassItable::compute_itable_size(_transitive_interfaces);
6288
6289 assert(_fac != NULL, "invariant");
6290 assert(_parsed_annotations != NULL, "invariant");
6291
6292 _field_info = new FieldLayoutInfo();
6293 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6294
6295 // Compute reference typ
6296 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6297
6298 }
6299
6300 void ClassFileParser::set_klass(InstanceKlass* klass) {
6301
6302 #ifdef ASSERT
6303 if (klass != NULL) {
6304 assert(NULL == _klass, "leaking?");
6305 }
6306 #endif
6307
6308 _klass = klass;
6309 }
6310
6311 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6312
6313 #ifdef ASSERT
6314 if (klass != NULL) {
6315 assert(NULL == _klass_to_deallocate, "leaking?");
6316 }
6317 #endif
6318
6319 _klass_to_deallocate = klass;
6320 }
6321
6322 // Caller responsible for ResourceMark
6323 // clone stream with rewound position
6324 const ClassFileStream* ClassFileParser::clone_stream() const {
6325 assert(_stream != NULL, "invariant");
6326
6327 return _stream->clone();
6328 }
6329 // ----------------------------------------------------------------------------
6330 // debugging
6331
6332 #ifdef ASSERT
6333
6334 // return true if class_name contains no '.' (internal format is '/')
6335 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6336 if (class_name != NULL) {
6337 ResourceMark rm;
6338 char* name = class_name->as_C_string();
6339 return strchr(name, '.') == NULL;
6340 } else {
6341 return true;
6342 }
6343 }
6344
6345 #endif