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 _method_sig_count++;
666 } else {
667 // Format check field name and signature
668 verify_legal_field_name(name, CHECK);
669 verify_legal_field_signature(name, sig, CHECK);
670 }
671 }
672 break;
673 }
674 case JVM_CONSTANT_Dynamic: {
675 const int name_and_type_ref_index =
676 cp->name_and_type_ref_index_at(index);
677 // already verified to be utf8
678 const int name_ref_index =
679 cp->name_ref_index_at(name_and_type_ref_index);
680 // already verified to be utf8
681 const int signature_ref_index =
682 cp->signature_ref_index_at(name_and_type_ref_index);
683 const Symbol* const name = cp->symbol_at(name_ref_index);
684 const Symbol* const signature = cp->symbol_at(signature_ref_index);
685 if (_need_verify) {
686 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
687 // Need only to be sure signature is non-zero length and the right type.
688 if (signature->utf8_length() == 0 ||
689 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
690 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
691 }
692 }
693 break;
694 }
695 case JVM_CONSTANT_InvokeDynamic:
696 case JVM_CONSTANT_Fieldref:
697 case JVM_CONSTANT_Methodref:
698 case JVM_CONSTANT_InterfaceMethodref: {
699 const int name_and_type_ref_index =
700 cp->name_and_type_ref_index_at(index);
701 // already verified to be utf8
702 const int name_ref_index =
703 cp->name_ref_index_at(name_and_type_ref_index);
704 // already verified to be utf8
705 const int signature_ref_index =
706 cp->signature_ref_index_at(name_and_type_ref_index);
707 const Symbol* const name = cp->symbol_at(name_ref_index);
708 const Symbol* const signature = cp->symbol_at(signature_ref_index);
709 if (tag == JVM_CONSTANT_Fieldref) {
710 if (_need_verify) {
711 // Field name and signature are verified above, when iterating NameAndType_info.
712 // Need only to be sure signature is non-zero length and the right type.
713 if (signature->utf8_length() == 0 ||
714 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
715 throwIllegalSignature("Field", name, signature, CHECK);
716 }
717 }
718 } else {
719 if (_need_verify) {
720 // Method name and signature are verified above, when iterating NameAndType_info.
721 // Need only to be sure signature is non-zero length and the right type.
722 if (signature->utf8_length() == 0 ||
723 signature->char_at(0) != JVM_SIGNATURE_FUNC) {
724 throwIllegalSignature("Method", name, signature, CHECK);
725 }
726 }
727 // 4509014: If a class method name begins with '<', it must be "<init>"
728 const unsigned int name_len = name->utf8_length();
729 if (tag == JVM_CONSTANT_Methodref &&
730 name_len != 0 &&
731 name->char_at(0) == '<' &&
732 name != vmSymbols::object_initializer_name()) {
733 classfile_parse_error(
734 "Bad method name at constant pool index %u in class file %s",
735 name_ref_index, CHECK);
736 }
737 }
738 break;
739 }
740 case JVM_CONSTANT_MethodHandle: {
741 const int ref_index = cp->method_handle_index_at(index);
742 const int ref_kind = cp->method_handle_ref_kind_at(index);
743 switch (ref_kind) {
744 case JVM_REF_invokeVirtual:
745 case JVM_REF_invokeStatic:
746 case JVM_REF_invokeSpecial:
747 case JVM_REF_newInvokeSpecial: {
748 const int name_and_type_ref_index =
749 cp->name_and_type_ref_index_at(ref_index);
750 const int name_ref_index =
751 cp->name_ref_index_at(name_and_type_ref_index);
752 const Symbol* const name = cp->symbol_at(name_ref_index);
753 if (ref_kind == JVM_REF_newInvokeSpecial) {
754 if (name != vmSymbols::object_initializer_name()) {
755 classfile_parse_error(
756 "Bad constructor name at constant pool index %u in class file %s",
757 name_ref_index, CHECK);
758 }
759 } else {
760 if (name == vmSymbols::object_initializer_name()) {
761 classfile_parse_error(
762 "Bad method name at constant pool index %u in class file %s",
763 name_ref_index, CHECK);
764 }
765 }
766 break;
767 }
768 // Other ref_kinds are already fully checked in previous pass.
769 } // switch(ref_kind)
770 break;
771 }
772 case JVM_CONSTANT_MethodType: {
773 const Symbol* const no_name = vmSymbols::type_name(); // place holder
774 const Symbol* const signature = cp->method_type_signature_at(index);
775 verify_legal_method_signature(no_name, signature, CHECK);
776 break;
777 }
778 case JVM_CONSTANT_Utf8: {
779 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
780 }
781 } // switch(tag)
782 } // end of for
783 }
784
785 Handle ClassFileParser::clear_cp_patch_at(int index) {
786 Handle patch = cp_patch_at(index);
787 _cp_patches->at_put(index, Handle());
788 assert(!has_cp_patch_at(index), "");
789 return patch;
790 }
791
792 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
793 int name_index = _orig_cp_size + _num_patched_klasses;
794 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
795
796 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
797 _num_patched_klasses ++;
798 }
799
800 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
801 int index,
802 Handle patch,
803 TRAPS) {
804 assert(cp != NULL, "invariant");
805
806 BasicType patch_type = T_VOID;
807
808 switch (cp->tag_at(index).value()) {
809
810 case JVM_CONSTANT_UnresolvedClass: {
811 // Patching a class means pre-resolving it.
812 // The name in the constant pool is ignored.
813 if (java_lang_Class::is_instance(patch())) {
814 guarantee_property(!java_lang_Class::is_primitive(patch()),
815 "Illegal class patch at %d in class file %s",
816 index, CHECK);
817 Klass* k = java_lang_Class::as_Klass(patch());
818 patch_class(cp, index, k, k->name());
819 } else {
820 guarantee_property(java_lang_String::is_instance(patch()),
821 "Illegal class patch at %d in class file %s",
822 index, CHECK);
823 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
824 patch_class(cp, index, NULL, name);
825 }
826 break;
827 }
828
829 case JVM_CONSTANT_String: {
830 // skip this patch and don't clear it. Needs the oop array for resolved
831 // references to be created first.
832 return;
833 }
834 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
835 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
836 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
837 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
838 patch_prim:
839 {
840 jvalue value;
841 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
842 guarantee_property(value_type == patch_type,
843 "Illegal primitive patch at %d in class file %s",
844 index, CHECK);
845 switch (value_type) {
846 case T_INT: cp->int_at_put(index, value.i); break;
847 case T_FLOAT: cp->float_at_put(index, value.f); break;
848 case T_LONG: cp->long_at_put(index, value.j); break;
849 case T_DOUBLE: cp->double_at_put(index, value.d); break;
850 default: assert(false, "");
851 }
852 } // end patch_prim label
853 break;
854
855 default: {
856 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
857 guarantee_property(!has_cp_patch_at(index),
858 "Illegal unexpected patch at %d in class file %s",
859 index, CHECK);
860 return;
861 }
862 } // end of switch(tag)
863
864 // On fall-through, mark the patch as used.
865 clear_cp_patch_at(index);
866 }
867 class NameSigHash: public ResourceObj {
868 public:
869 const Symbol* _name; // name
870 const Symbol* _sig; // signature
871 NameSigHash* _next; // Next entry in hash table
872 };
873
874 static const int HASH_ROW_SIZE = 256;
875
876 static unsigned int hash(const Symbol* name, const Symbol* sig) {
877 unsigned int raw_hash = 0;
878 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
879 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
880
881 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
882 }
883
884
885 static void initialize_hashtable(NameSigHash** table) {
886 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
887 }
888 // Return false if the name/sig combination is found in table.
889 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
890 // The old format checker uses heap sort to find duplicates.
891 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
892 // of table since we don't expect Symbol*'s to move.
893 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
894 assert(name != NULL, "name in constant pool is NULL");
895
896 // First lookup for duplicates
897 int index = hash(name, sig);
898 NameSigHash* entry = table[index];
899 while (entry != NULL) {
900 if (entry->_name == name && entry->_sig == sig) {
901 return false;
902 }
903 entry = entry->_next;
904 }
905
906 // No duplicate is found, allocate a new entry and fill it.
907 entry = new NameSigHash();
908 entry->_name = name;
909 entry->_sig = sig;
910
911 // Insert into hash table
912 entry->_next = table[index];
913 table[index] = entry;
914
915 return true;
916 }
917
918 // Side-effects: populates the _local_interfaces field
919 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
920 const int itfs_len,
921 ConstantPool* const cp,
922 bool* const has_nonstatic_concrete_methods,
923 TRAPS) {
924 assert(stream != NULL, "invariant");
925 assert(cp != NULL, "invariant");
926 assert(has_nonstatic_concrete_methods != NULL, "invariant");
927
928 if (itfs_len == 0) {
929 _local_interfaces = Universe::the_empty_instance_klass_array();
930 } else {
931 assert(itfs_len > 0, "only called for len>0");
932 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
933
934 int index;
935 for (index = 0; index < itfs_len; index++) {
936 const u2 interface_index = stream->get_u2(CHECK);
937 Klass* interf;
938 check_property(
939 valid_klass_reference_at(interface_index),
940 "Interface name has bad constant pool index %u in class file %s",
941 interface_index, CHECK);
942 if (cp->tag_at(interface_index).is_klass()) {
943 interf = cp->resolved_klass_at(interface_index);
944 } else {
945 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
946
947 // Don't need to check legal name because it's checked when parsing constant pool.
948 // But need to make sure it's not an array type.
949 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
950 "Bad interface name in class file %s", CHECK);
951
952 // Call resolve_super so classcircularity is checked
953 interf = SystemDictionary::resolve_super_or_fail(
954 _class_name,
955 unresolved_klass,
956 Handle(THREAD, _loader_data->class_loader()),
957 _protection_domain,
958 false,
959 CHECK);
960 }
961
962 if (!interf->is_interface()) {
963 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
964 err_msg("class %s can not implement %s, because it is not an interface (%s)",
965 _class_name->as_klass_external_name(),
966 interf->external_name(),
967 interf->class_in_module_of_loader()));
968 }
969
970 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
971 *has_nonstatic_concrete_methods = true;
972 }
973 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
974 }
975
976 if (!_need_verify || itfs_len <= 1) {
977 return;
978 }
979
980 // Check if there's any duplicates in interfaces
981 ResourceMark rm(THREAD);
982 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
983 NameSigHash*,
984 HASH_ROW_SIZE);
985 initialize_hashtable(interface_names);
986 bool dup = false;
987 const Symbol* name = NULL;
988 {
989 debug_only(NoSafepointVerifier nsv;)
990 for (index = 0; index < itfs_len; index++) {
991 const InstanceKlass* const k = _local_interfaces->at(index);
992 name = k->name();
993 // If no duplicates, add (name, NULL) in hashtable interface_names.
994 if (!put_after_lookup(name, NULL, interface_names)) {
995 dup = true;
996 break;
997 }
998 }
999 }
1000 if (dup) {
1001 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
1002 name->as_C_string(), CHECK);
1003 }
1004 }
1005 }
1006
1007 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
1008 int constantvalue_index,
1009 int signature_index,
1010 TRAPS) const {
1011 // Make sure the constant pool entry is of a type appropriate to this field
1012 guarantee_property(
1013 (constantvalue_index > 0 &&
1014 constantvalue_index < cp->length()),
1015 "Bad initial value index %u in ConstantValue attribute in class file %s",
1016 constantvalue_index, CHECK);
1017
1018 const constantTag value_type = cp->tag_at(constantvalue_index);
1019 switch(cp->basic_type_for_signature_at(signature_index)) {
1020 case T_LONG: {
1021 guarantee_property(value_type.is_long(),
1022 "Inconsistent constant value type in class file %s",
1023 CHECK);
1024 break;
1025 }
1026 case T_FLOAT: {
1027 guarantee_property(value_type.is_float(),
1028 "Inconsistent constant value type in class file %s",
1029 CHECK);
1030 break;
1031 }
1032 case T_DOUBLE: {
1033 guarantee_property(value_type.is_double(),
1034 "Inconsistent constant value type in class file %s",
1035 CHECK);
1036 break;
1037 }
1038 case T_BYTE:
1039 case T_CHAR:
1040 case T_SHORT:
1041 case T_BOOLEAN:
1042 case T_INT: {
1043 guarantee_property(value_type.is_int(),
1044 "Inconsistent constant value type in class file %s",
1045 CHECK);
1046 break;
1047 }
1048 case T_OBJECT: {
1049 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1050 && value_type.is_string()),
1051 "Bad string initial value in class file %s",
1052 CHECK);
1053 break;
1054 }
1055 default: {
1056 classfile_parse_error("Unable to set initial value %u in class file %s",
1057 constantvalue_index,
1058 CHECK);
1059 }
1060 }
1061 }
1062
1063 class AnnotationCollector : public ResourceObj{
1064 public:
1065 enum Location { _in_field, _in_method, _in_class };
1066 enum ID {
1067 _unknown = 0,
1068 _method_CallerSensitive,
1069 _method_ForceInline,
1070 _method_DontInline,
1071 _method_InjectedProfile,
1072 _method_LambdaForm_Compiled,
1073 _method_Hidden,
1074 _method_HotSpotIntrinsicCandidate,
1075 _jdk_internal_vm_annotation_Contended,
1076 _field_Stable,
1077 _jdk_internal_vm_annotation_ReservedStackAccess,
1078 _annotation_LIMIT
1079 };
1080 const Location _location;
1081 int _annotations_present;
1082 u2 _contended_group;
1083
1084 AnnotationCollector(Location location)
1085 : _location(location), _annotations_present(0)
1086 {
1087 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1088 }
1089 // If this annotation name has an ID, report it (or _none).
1090 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1091 // Set the annotation name:
1092 void set_annotation(ID id) {
1093 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1094 _annotations_present |= nth_bit((int)id);
1095 }
1096
1097 void remove_annotation(ID id) {
1098 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1099 _annotations_present &= ~nth_bit((int)id);
1100 }
1101
1102 // Report if the annotation is present.
1103 bool has_any_annotations() const { return _annotations_present != 0; }
1104 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1105
1106 void set_contended_group(u2 group) { _contended_group = group; }
1107 u2 contended_group() const { return _contended_group; }
1108
1109 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1110
1111 void set_stable(bool stable) { set_annotation(_field_Stable); }
1112 bool is_stable() const { return has_annotation(_field_Stable); }
1113 };
1114
1115 // This class also doubles as a holder for metadata cleanup.
1116 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1117 private:
1118 ClassLoaderData* _loader_data;
1119 AnnotationArray* _field_annotations;
1120 AnnotationArray* _field_type_annotations;
1121 public:
1122 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1123 AnnotationCollector(_in_field),
1124 _loader_data(loader_data),
1125 _field_annotations(NULL),
1126 _field_type_annotations(NULL) {}
1127 ~FieldAnnotationCollector();
1128 void apply_to(FieldInfo* f);
1129 AnnotationArray* field_annotations() { return _field_annotations; }
1130 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1131
1132 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1133 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1134 };
1135
1136 class MethodAnnotationCollector : public AnnotationCollector{
1137 public:
1138 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1139 void apply_to(const methodHandle& m);
1140 };
1141
1142 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1143 public:
1144 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1145 void apply_to(InstanceKlass* ik);
1146 };
1147
1148
1149 static int skip_annotation_value(const u1*, int, int); // fwd decl
1150
1151 // Safely increment index by val if does not pass limit
1152 #define SAFE_ADD(index, limit, val) \
1153 if (index >= limit - val) return limit; \
1154 index += val;
1155
1156 // Skip an annotation. Return >=limit if there is any problem.
1157 static int skip_annotation(const u1* buffer, int limit, int index) {
1158 assert(buffer != NULL, "invariant");
1159 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1160 // value := switch (tag:u1) { ... }
1161 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1162 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1163 while (--nmem >= 0 && index < limit) {
1164 SAFE_ADD(index, limit, 2); // skip member
1165 index = skip_annotation_value(buffer, limit, index);
1166 }
1167 return index;
1168 }
1169
1170 // Skip an annotation value. Return >=limit if there is any problem.
1171 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1172 assert(buffer != NULL, "invariant");
1173
1174 // value := switch (tag:u1) {
1175 // case B, C, I, S, Z, D, F, J, c: con:u2;
1176 // case e: e_class:u2 e_name:u2;
1177 // case s: s_con:u2;
1178 // case [: do(nval:u2) {value};
1179 // case @: annotation;
1180 // case s: s_con:u2;
1181 // }
1182 SAFE_ADD(index, limit, 1); // read tag
1183 const u1 tag = buffer[index - 1];
1184 switch (tag) {
1185 case 'B':
1186 case 'C':
1187 case 'I':
1188 case 'S':
1189 case 'Z':
1190 case 'D':
1191 case 'F':
1192 case 'J':
1193 case 'c':
1194 case 's':
1195 SAFE_ADD(index, limit, 2); // skip con or s_con
1196 break;
1197 case 'e':
1198 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1199 break;
1200 case '[':
1201 {
1202 SAFE_ADD(index, limit, 2); // read nval
1203 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1204 while (--nval >= 0 && index < limit) {
1205 index = skip_annotation_value(buffer, limit, index);
1206 }
1207 }
1208 break;
1209 case '@':
1210 index = skip_annotation(buffer, limit, index);
1211 break;
1212 default:
1213 return limit; // bad tag byte
1214 }
1215 return index;
1216 }
1217
1218 // Sift through annotations, looking for those significant to the VM:
1219 static void parse_annotations(const ConstantPool* const cp,
1220 const u1* buffer, int limit,
1221 AnnotationCollector* coll,
1222 ClassLoaderData* loader_data,
1223 TRAPS) {
1224
1225 assert(cp != NULL, "invariant");
1226 assert(buffer != NULL, "invariant");
1227 assert(coll != NULL, "invariant");
1228 assert(loader_data != NULL, "invariant");
1229
1230 // annotations := do(nann:u2) {annotation}
1231 int index = 2; // read nann
1232 if (index >= limit) return;
1233 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1234 enum { // initial annotation layout
1235 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1236 count_off = 2, // u2 such as 1 (one value)
1237 member_off = 4, // utf8 such as 'value'
1238 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1239 e_tag_val = 'e',
1240 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1241 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1242 e_size = 11, // end of 'e' annotation
1243 c_tag_val = 'c', // payload is type
1244 c_con_off = 7, // utf8 payload, such as 'I'
1245 c_size = 9, // end of 'c' annotation
1246 s_tag_val = 's', // payload is String
1247 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1248 s_size = 9,
1249 min_size = 6 // smallest possible size (zero members)
1250 };
1251 // Cannot add min_size to index in case of overflow MAX_INT
1252 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1253 int index0 = index;
1254 index = skip_annotation(buffer, limit, index);
1255 const u1* const abase = buffer + index0;
1256 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1257 const int count = Bytes::get_Java_u2((address)abase + count_off);
1258 const Symbol* const aname = check_symbol_at(cp, atype);
1259 if (aname == NULL) break; // invalid annotation name
1260 const Symbol* member = NULL;
1261 if (count >= 1) {
1262 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1263 member = check_symbol_at(cp, member_index);
1264 if (member == NULL) break; // invalid member name
1265 }
1266
1267 // Here is where parsing particular annotations will take place.
1268 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1269 if (AnnotationCollector::_unknown == id) continue;
1270 coll->set_annotation(id);
1271
1272 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1273 // @Contended can optionally specify the contention group.
1274 //
1275 // Contended group defines the equivalence class over the fields:
1276 // the fields within the same contended group are not treated distinct.
1277 // The only exception is default group, which does not incur the
1278 // equivalence. Naturally, contention group for classes is meaningless.
1279 //
1280 // While the contention group is specified as String, annotation
1281 // values are already interned, and we might as well use the constant
1282 // pool index as the group tag.
1283 //
1284 u2 group_index = 0; // default contended group
1285 if (count == 1
1286 && s_size == (index - index0) // match size
1287 && s_tag_val == *(abase + tag_off)
1288 && member == vmSymbols::value_name()) {
1289 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1290 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1291 group_index = 0; // default contended group
1292 }
1293 }
1294 coll->set_contended_group(group_index);
1295 }
1296 }
1297 }
1298
1299
1300 // Parse attributes for a field.
1301 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1302 u2 attributes_count,
1303 bool is_static, u2 signature_index,
1304 u2* const constantvalue_index_addr,
1305 bool* const is_synthetic_addr,
1306 u2* const generic_signature_index_addr,
1307 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1308 TRAPS) {
1309 assert(cfs != NULL, "invariant");
1310 assert(constantvalue_index_addr != NULL, "invariant");
1311 assert(is_synthetic_addr != NULL, "invariant");
1312 assert(generic_signature_index_addr != NULL, "invariant");
1313 assert(parsed_annotations != NULL, "invariant");
1314 assert(attributes_count > 0, "attributes_count should be greater than 0");
1315
1316 u2 constantvalue_index = 0;
1317 u2 generic_signature_index = 0;
1318 bool is_synthetic = false;
1319 const u1* runtime_visible_annotations = NULL;
1320 int runtime_visible_annotations_length = 0;
1321 const u1* runtime_invisible_annotations = NULL;
1322 int runtime_invisible_annotations_length = 0;
1323 const u1* runtime_visible_type_annotations = NULL;
1324 int runtime_visible_type_annotations_length = 0;
1325 const u1* runtime_invisible_type_annotations = NULL;
1326 int runtime_invisible_type_annotations_length = 0;
1327 bool runtime_invisible_annotations_exists = false;
1328 bool runtime_invisible_type_annotations_exists = false;
1329 const ConstantPool* const cp = _cp;
1330
1331 while (attributes_count--) {
1332 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1333 const u2 attribute_name_index = cfs->get_u2_fast();
1334 const u4 attribute_length = cfs->get_u4_fast();
1335 check_property(valid_symbol_at(attribute_name_index),
1336 "Invalid field attribute index %u in class file %s",
1337 attribute_name_index,
1338 CHECK);
1339
1340 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1341 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1342 // ignore if non-static
1343 if (constantvalue_index != 0) {
1344 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1345 }
1346 check_property(
1347 attribute_length == 2,
1348 "Invalid ConstantValue field attribute length %u in class file %s",
1349 attribute_length, CHECK);
1350
1351 constantvalue_index = cfs->get_u2(CHECK);
1352 if (_need_verify) {
1353 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1354 }
1355 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1356 if (attribute_length != 0) {
1357 classfile_parse_error(
1358 "Invalid Synthetic field attribute length %u in class file %s",
1359 attribute_length, CHECK);
1360 }
1361 is_synthetic = true;
1362 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1363 if (attribute_length != 0) {
1364 classfile_parse_error(
1365 "Invalid Deprecated field attribute length %u in class file %s",
1366 attribute_length, CHECK);
1367 }
1368 } else if (_major_version >= JAVA_1_5_VERSION) {
1369 if (attribute_name == vmSymbols::tag_signature()) {
1370 if (generic_signature_index != 0) {
1371 classfile_parse_error(
1372 "Multiple Signature attributes for field in class file %s", CHECK);
1373 }
1374 if (attribute_length != 2) {
1375 classfile_parse_error(
1376 "Wrong size %u for field's Signature attribute in class file %s",
1377 attribute_length, CHECK);
1378 }
1379 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1380 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1381 if (runtime_visible_annotations != NULL) {
1382 classfile_parse_error(
1383 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1384 }
1385 runtime_visible_annotations_length = attribute_length;
1386 runtime_visible_annotations = cfs->current();
1387 assert(runtime_visible_annotations != NULL, "null visible annotations");
1388 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1389 parse_annotations(cp,
1390 runtime_visible_annotations,
1391 runtime_visible_annotations_length,
1392 parsed_annotations,
1393 _loader_data,
1394 CHECK);
1395 cfs->skip_u1_fast(runtime_visible_annotations_length);
1396 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1397 if (runtime_invisible_annotations_exists) {
1398 classfile_parse_error(
1399 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1400 }
1401 runtime_invisible_annotations_exists = true;
1402 if (PreserveAllAnnotations) {
1403 runtime_invisible_annotations_length = attribute_length;
1404 runtime_invisible_annotations = cfs->current();
1405 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1406 }
1407 cfs->skip_u1(attribute_length, CHECK);
1408 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1409 if (runtime_visible_type_annotations != NULL) {
1410 classfile_parse_error(
1411 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1412 }
1413 runtime_visible_type_annotations_length = attribute_length;
1414 runtime_visible_type_annotations = cfs->current();
1415 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1416 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1417 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1418 if (runtime_invisible_type_annotations_exists) {
1419 classfile_parse_error(
1420 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1421 } else {
1422 runtime_invisible_type_annotations_exists = true;
1423 }
1424 if (PreserveAllAnnotations) {
1425 runtime_invisible_type_annotations_length = attribute_length;
1426 runtime_invisible_type_annotations = cfs->current();
1427 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1428 }
1429 cfs->skip_u1(attribute_length, CHECK);
1430 } else {
1431 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1432 }
1433 } else {
1434 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1435 }
1436 }
1437
1438 *constantvalue_index_addr = constantvalue_index;
1439 *is_synthetic_addr = is_synthetic;
1440 *generic_signature_index_addr = generic_signature_index;
1441 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1442 runtime_visible_annotations_length,
1443 runtime_invisible_annotations,
1444 runtime_invisible_annotations_length,
1445 CHECK);
1446 parsed_annotations->set_field_annotations(a);
1447 a = assemble_annotations(runtime_visible_type_annotations,
1448 runtime_visible_type_annotations_length,
1449 runtime_invisible_type_annotations,
1450 runtime_invisible_type_annotations_length,
1451 CHECK);
1452 parsed_annotations->set_field_type_annotations(a);
1453 return;
1454 }
1455
1456
1457 // Field allocation types. Used for computing field offsets.
1458
1459 enum FieldAllocationType {
1460 STATIC_OOP, // Oops
1461 STATIC_BYTE, // Boolean, Byte, char
1462 STATIC_SHORT, // shorts
1463 STATIC_WORD, // ints
1464 STATIC_DOUBLE, // aligned long or double
1465 NONSTATIC_OOP,
1466 NONSTATIC_BYTE,
1467 NONSTATIC_SHORT,
1468 NONSTATIC_WORD,
1469 NONSTATIC_DOUBLE,
1470 MAX_FIELD_ALLOCATION_TYPE,
1471 BAD_ALLOCATION_TYPE = -1
1472 };
1473
1474 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1475 BAD_ALLOCATION_TYPE, // 0
1476 BAD_ALLOCATION_TYPE, // 1
1477 BAD_ALLOCATION_TYPE, // 2
1478 BAD_ALLOCATION_TYPE, // 3
1479 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1480 NONSTATIC_SHORT, // T_CHAR = 5,
1481 NONSTATIC_WORD, // T_FLOAT = 6,
1482 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1483 NONSTATIC_BYTE, // T_BYTE = 8,
1484 NONSTATIC_SHORT, // T_SHORT = 9,
1485 NONSTATIC_WORD, // T_INT = 10,
1486 NONSTATIC_DOUBLE, // T_LONG = 11,
1487 NONSTATIC_OOP, // T_OBJECT = 12,
1488 NONSTATIC_OOP, // T_ARRAY = 13,
1489 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1490 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1491 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1492 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1493 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1494 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1495 BAD_ALLOCATION_TYPE, // 0
1496 BAD_ALLOCATION_TYPE, // 1
1497 BAD_ALLOCATION_TYPE, // 2
1498 BAD_ALLOCATION_TYPE, // 3
1499 STATIC_BYTE , // T_BOOLEAN = 4,
1500 STATIC_SHORT, // T_CHAR = 5,
1501 STATIC_WORD, // T_FLOAT = 6,
1502 STATIC_DOUBLE, // T_DOUBLE = 7,
1503 STATIC_BYTE, // T_BYTE = 8,
1504 STATIC_SHORT, // T_SHORT = 9,
1505 STATIC_WORD, // T_INT = 10,
1506 STATIC_DOUBLE, // T_LONG = 11,
1507 STATIC_OOP, // T_OBJECT = 12,
1508 STATIC_OOP, // T_ARRAY = 13,
1509 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1510 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1511 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1512 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1513 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1514 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1515 };
1516
1517 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1518 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1519 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1520 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1521 return result;
1522 }
1523
1524 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1525 public:
1526 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1527
1528 FieldAllocationCount() {
1529 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1530 count[i] = 0;
1531 }
1532 }
1533
1534 FieldAllocationType update(bool is_static, BasicType type) {
1535 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1536 if (atype != BAD_ALLOCATION_TYPE) {
1537 // Make sure there is no overflow with injected fields.
1538 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1539 count[atype]++;
1540 }
1541 return atype;
1542 }
1543 };
1544
1545 // Side-effects: populates the _fields, _fields_annotations,
1546 // _fields_type_annotations fields
1547 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1548 bool is_interface,
1549 FieldAllocationCount* const fac,
1550 ConstantPool* cp,
1551 const int cp_size,
1552 u2* const java_fields_count_ptr,
1553 TRAPS) {
1554
1555 assert(cfs != NULL, "invariant");
1556 assert(fac != NULL, "invariant");
1557 assert(cp != NULL, "invariant");
1558 assert(java_fields_count_ptr != NULL, "invariant");
1559
1560 assert(NULL == _fields, "invariant");
1561 assert(NULL == _fields_annotations, "invariant");
1562 assert(NULL == _fields_type_annotations, "invariant");
1563
1564 cfs->guarantee_more(2, CHECK); // length
1565 const u2 length = cfs->get_u2_fast();
1566 *java_fields_count_ptr = length;
1567
1568 int num_injected = 0;
1569 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1570 &num_injected);
1571 const int total_fields = length + num_injected;
1572
1573 // The field array starts with tuples of shorts
1574 // [access, name index, sig index, initial value index, byte offset].
1575 // A generic signature slot only exists for field with generic
1576 // signature attribute. And the access flag is set with
1577 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1578 // signature slots are at the end of the field array and after all
1579 // other fields data.
1580 //
1581 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1582 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1583 // ...
1584 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1585 // [generic signature index]
1586 // [generic signature index]
1587 // ...
1588 //
1589 // Allocate a temporary resource array for field data. For each field,
1590 // a slot is reserved in the temporary array for the generic signature
1591 // index. After parsing all fields, the data are copied to a permanent
1592 // array and any unused slots will be discarded.
1593 ResourceMark rm(THREAD);
1594 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1595 u2,
1596 total_fields * (FieldInfo::field_slots + 1));
1597
1598 // The generic signature slots start after all other fields' data.
1599 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1600 int num_generic_signature = 0;
1601 for (int n = 0; n < length; n++) {
1602 // access_flags, name_index, descriptor_index, attributes_count
1603 cfs->guarantee_more(8, CHECK);
1604
1605 AccessFlags access_flags;
1606 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1607 verify_legal_field_modifiers(flags, is_interface, CHECK);
1608 access_flags.set_flags(flags);
1609
1610 const u2 name_index = cfs->get_u2_fast();
1611 check_property(valid_symbol_at(name_index),
1612 "Invalid constant pool index %u for field name in class file %s",
1613 name_index, CHECK);
1614 const Symbol* const name = cp->symbol_at(name_index);
1615 verify_legal_field_name(name, CHECK);
1616
1617 const u2 signature_index = cfs->get_u2_fast();
1618 check_property(valid_symbol_at(signature_index),
1619 "Invalid constant pool index %u for field signature in class file %s",
1620 signature_index, CHECK);
1621 const Symbol* const sig = cp->symbol_at(signature_index);
1622 verify_legal_field_signature(name, sig, CHECK);
1623
1624 u2 constantvalue_index = 0;
1625 bool is_synthetic = false;
1626 u2 generic_signature_index = 0;
1627 const bool is_static = access_flags.is_static();
1628 FieldAnnotationCollector parsed_annotations(_loader_data);
1629
1630 const u2 attributes_count = cfs->get_u2_fast();
1631 if (attributes_count > 0) {
1632 parse_field_attributes(cfs,
1633 attributes_count,
1634 is_static,
1635 signature_index,
1636 &constantvalue_index,
1637 &is_synthetic,
1638 &generic_signature_index,
1639 &parsed_annotations,
1640 CHECK);
1641
1642 if (parsed_annotations.field_annotations() != NULL) {
1643 if (_fields_annotations == NULL) {
1644 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1645 _loader_data, length, NULL,
1646 CHECK);
1647 }
1648 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1649 parsed_annotations.set_field_annotations(NULL);
1650 }
1651 if (parsed_annotations.field_type_annotations() != NULL) {
1652 if (_fields_type_annotations == NULL) {
1653 _fields_type_annotations =
1654 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1655 length,
1656 NULL,
1657 CHECK);
1658 }
1659 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1660 parsed_annotations.set_field_type_annotations(NULL);
1661 }
1662
1663 if (is_synthetic) {
1664 access_flags.set_is_synthetic();
1665 }
1666 if (generic_signature_index != 0) {
1667 access_flags.set_field_has_generic_signature();
1668 fa[generic_signature_slot] = generic_signature_index;
1669 generic_signature_slot ++;
1670 num_generic_signature ++;
1671 }
1672 }
1673
1674 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1675 field->initialize(access_flags.as_short(),
1676 name_index,
1677 signature_index,
1678 constantvalue_index);
1679 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1680
1681 // Remember how many oops we encountered and compute allocation type
1682 const FieldAllocationType atype = fac->update(is_static, type);
1683 field->set_allocation_type(atype);
1684
1685 // After field is initialized with type, we can augment it with aux info
1686 if (parsed_annotations.has_any_annotations())
1687 parsed_annotations.apply_to(field);
1688 }
1689
1690 int index = length;
1691 if (num_injected != 0) {
1692 for (int n = 0; n < num_injected; n++) {
1693 // Check for duplicates
1694 if (injected[n].may_be_java) {
1695 const Symbol* const name = injected[n].name();
1696 const Symbol* const signature = injected[n].signature();
1697 bool duplicate = false;
1698 for (int i = 0; i < length; i++) {
1699 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1700 if (name == cp->symbol_at(f->name_index()) &&
1701 signature == cp->symbol_at(f->signature_index())) {
1702 // Symbol is desclared in Java so skip this one
1703 duplicate = true;
1704 break;
1705 }
1706 }
1707 if (duplicate) {
1708 // These will be removed from the field array at the end
1709 continue;
1710 }
1711 }
1712
1713 // Injected field
1714 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1715 field->initialize(JVM_ACC_FIELD_INTERNAL,
1716 injected[n].name_index,
1717 injected[n].signature_index,
1718 0);
1719
1720 const BasicType type = FieldType::basic_type(injected[n].signature());
1721
1722 // Remember how many oops we encountered and compute allocation type
1723 const FieldAllocationType atype = fac->update(false, type);
1724 field->set_allocation_type(atype);
1725 index++;
1726 }
1727 }
1728
1729 assert(NULL == _fields, "invariant");
1730
1731 _fields =
1732 MetadataFactory::new_array<u2>(_loader_data,
1733 index * FieldInfo::field_slots + num_generic_signature,
1734 CHECK);
1735 // Sometimes injected fields already exist in the Java source so
1736 // the fields array could be too long. In that case the
1737 // fields array is trimed. Also unused slots that were reserved
1738 // for generic signature indexes are discarded.
1739 {
1740 int i = 0;
1741 for (; i < index * FieldInfo::field_slots; i++) {
1742 _fields->at_put(i, fa[i]);
1743 }
1744 for (int j = total_fields * FieldInfo::field_slots;
1745 j < generic_signature_slot; j++) {
1746 _fields->at_put(i++, fa[j]);
1747 }
1748 assert(_fields->length() == i, "");
1749 }
1750
1751 if (_need_verify && length > 1) {
1752 // Check duplicated fields
1753 ResourceMark rm(THREAD);
1754 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1755 THREAD, NameSigHash*, HASH_ROW_SIZE);
1756 initialize_hashtable(names_and_sigs);
1757 bool dup = false;
1758 const Symbol* name = NULL;
1759 const Symbol* sig = NULL;
1760 {
1761 debug_only(NoSafepointVerifier nsv;)
1762 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1763 name = fs.name();
1764 sig = fs.signature();
1765 // If no duplicates, add name/signature in hashtable names_and_sigs.
1766 if (!put_after_lookup(name, sig, names_and_sigs)) {
1767 dup = true;
1768 break;
1769 }
1770 }
1771 }
1772 if (dup) {
1773 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1774 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1775 }
1776 }
1777 }
1778
1779
1780 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1781 u4 code_length,
1782 u4 exception_table_length,
1783 TRAPS) {
1784 assert(cfs != NULL, "invariant");
1785
1786 const unsafe_u2* const exception_table_start = cfs->current();
1787 assert(exception_table_start != NULL, "null exception table");
1788
1789 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1790 // end_pc,
1791 // handler_pc,
1792 // catch_type_index
1793
1794 // Will check legal target after parsing code array in verifier.
1795 if (_need_verify) {
1796 for (unsigned int i = 0; i < exception_table_length; i++) {
1797 const u2 start_pc = cfs->get_u2_fast();
1798 const u2 end_pc = cfs->get_u2_fast();
1799 const u2 handler_pc = cfs->get_u2_fast();
1800 const u2 catch_type_index = cfs->get_u2_fast();
1801 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1802 "Illegal exception table range in class file %s",
1803 CHECK_NULL);
1804 guarantee_property(handler_pc < code_length,
1805 "Illegal exception table handler in class file %s",
1806 CHECK_NULL);
1807 if (catch_type_index != 0) {
1808 guarantee_property(valid_klass_reference_at(catch_type_index),
1809 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1810 }
1811 }
1812 } else {
1813 cfs->skip_u2_fast(exception_table_length * 4);
1814 }
1815 return exception_table_start;
1816 }
1817
1818 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1819 u4 code_length,
1820 CompressedLineNumberWriteStream**const write_stream,
1821 TRAPS) {
1822
1823 const ClassFileStream* const cfs = _stream;
1824 unsigned int num_entries = cfs->get_u2(CHECK);
1825
1826 // Each entry is a u2 start_pc, and a u2 line_number
1827 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1828
1829 // Verify line number attribute and table length
1830 check_property(
1831 code_attribute_length == sizeof(u2) + length_in_bytes,
1832 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1833
1834 cfs->guarantee_more(length_in_bytes, CHECK);
1835
1836 if ((*write_stream) == NULL) {
1837 if (length_in_bytes > fixed_buffer_size) {
1838 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1839 } else {
1840 (*write_stream) = new CompressedLineNumberWriteStream(
1841 _linenumbertable_buffer, fixed_buffer_size);
1842 }
1843 }
1844
1845 while (num_entries-- > 0) {
1846 const u2 bci = cfs->get_u2_fast(); // start_pc
1847 const u2 line = cfs->get_u2_fast(); // line_number
1848 guarantee_property(bci < code_length,
1849 "Invalid pc in LineNumberTable in class file %s", CHECK);
1850 (*write_stream)->write_pair(bci, line);
1851 }
1852 }
1853
1854
1855 class LVT_Hash : public AllStatic {
1856 public:
1857
1858 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1859 /*
1860 * 3-tuple start_bci/length/slot has to be unique key,
1861 * so the following comparison seems to be redundant:
1862 * && elem->name_cp_index == entry->_elem->name_cp_index
1863 */
1864 return (e0.start_bci == e1.start_bci &&
1865 e0.length == e1.length &&
1866 e0.name_cp_index == e1.name_cp_index &&
1867 e0.slot == e1.slot);
1868 }
1869
1870 static unsigned int hash(LocalVariableTableElement const& e0) {
1871 unsigned int raw_hash = e0.start_bci;
1872
1873 raw_hash = e0.length + raw_hash * 37;
1874 raw_hash = e0.name_cp_index + raw_hash * 37;
1875 raw_hash = e0.slot + raw_hash * 37;
1876
1877 return raw_hash;
1878 }
1879 };
1880
1881
1882 // Class file LocalVariableTable elements.
1883 class Classfile_LVT_Element {
1884 public:
1885 u2 start_bci;
1886 u2 length;
1887 u2 name_cp_index;
1888 u2 descriptor_cp_index;
1889 u2 slot;
1890 };
1891
1892 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1893 LocalVariableTableElement* const lvt) {
1894 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1895 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1896 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1897 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1898 lvt->signature_cp_index = 0;
1899 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1900 }
1901
1902 // Function is used to parse both attributes:
1903 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1904 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1905 u4 code_length,
1906 u2 max_locals,
1907 u4 code_attribute_length,
1908 u2* const localvariable_table_length,
1909 bool isLVTT,
1910 TRAPS) {
1911 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1912 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1913 const unsigned int size =
1914 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1915
1916 const ConstantPool* const cp = _cp;
1917
1918 // Verify local variable table attribute has right length
1919 if (_need_verify) {
1920 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1921 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1922 }
1923
1924 const unsafe_u2* const localvariable_table_start = cfs->current();
1925 assert(localvariable_table_start != NULL, "null local variable table");
1926 if (!_need_verify) {
1927 cfs->skip_u2_fast(size);
1928 } else {
1929 cfs->guarantee_more(size * 2, CHECK_NULL);
1930 for(int i = 0; i < (*localvariable_table_length); i++) {
1931 const u2 start_pc = cfs->get_u2_fast();
1932 const u2 length = cfs->get_u2_fast();
1933 const u2 name_index = cfs->get_u2_fast();
1934 const u2 descriptor_index = cfs->get_u2_fast();
1935 const u2 index = cfs->get_u2_fast();
1936 // Assign to a u4 to avoid overflow
1937 const u4 end_pc = (u4)start_pc + (u4)length;
1938
1939 if (start_pc >= code_length) {
1940 classfile_parse_error(
1941 "Invalid start_pc %u in %s in class file %s",
1942 start_pc, tbl_name, CHECK_NULL);
1943 }
1944 if (end_pc > code_length) {
1945 classfile_parse_error(
1946 "Invalid length %u in %s in class file %s",
1947 length, tbl_name, CHECK_NULL);
1948 }
1949 const int cp_size = cp->length();
1950 guarantee_property(valid_symbol_at(name_index),
1951 "Name index %u in %s has bad constant type in class file %s",
1952 name_index, tbl_name, CHECK_NULL);
1953 guarantee_property(valid_symbol_at(descriptor_index),
1954 "Signature index %u in %s has bad constant type in class file %s",
1955 descriptor_index, tbl_name, CHECK_NULL);
1956
1957 const Symbol* const name = cp->symbol_at(name_index);
1958 const Symbol* const sig = cp->symbol_at(descriptor_index);
1959 verify_legal_field_name(name, CHECK_NULL);
1960 u2 extra_slot = 0;
1961 if (!isLVTT) {
1962 verify_legal_field_signature(name, sig, CHECK_NULL);
1963
1964 // 4894874: check special cases for double and long local variables
1965 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1966 sig == vmSymbols::type_signature(T_LONG)) {
1967 extra_slot = 1;
1968 }
1969 }
1970 guarantee_property((index + extra_slot) < max_locals,
1971 "Invalid index %u in %s in class file %s",
1972 index, tbl_name, CHECK_NULL);
1973 }
1974 }
1975 return localvariable_table_start;
1976 }
1977
1978 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1979 u4 code_attribute_length,
1980 bool need_verify,
1981 TRAPS) {
1982 assert(cfs != NULL, "invariant");
1983
1984 if (0 == code_attribute_length) {
1985 return NULL;
1986 }
1987
1988 const u1* const stackmap_table_start = cfs->current();
1989 assert(stackmap_table_start != NULL, "null stackmap table");
1990
1991 // check code_attribute_length first
1992 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1993
1994 if (!need_verify && !DumpSharedSpaces) {
1995 return NULL;
1996 }
1997 return stackmap_table_start;
1998 }
1999
2000 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2001 u2* const checked_exceptions_length,
2002 u4 method_attribute_length,
2003 TRAPS) {
2004 assert(cfs != NULL, "invariant");
2005 assert(checked_exceptions_length != NULL, "invariant");
2006
2007 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2008 *checked_exceptions_length = cfs->get_u2_fast();
2009 const unsigned int size =
2010 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2011 const unsafe_u2* const checked_exceptions_start = cfs->current();
2012 assert(checked_exceptions_start != NULL, "null checked exceptions");
2013 if (!_need_verify) {
2014 cfs->skip_u2_fast(size);
2015 } else {
2016 // Verify each value in the checked exception table
2017 u2 checked_exception;
2018 const u2 len = *checked_exceptions_length;
2019 cfs->guarantee_more(2 * len, CHECK_NULL);
2020 for (int i = 0; i < len; i++) {
2021 checked_exception = cfs->get_u2_fast();
2022 check_property(
2023 valid_klass_reference_at(checked_exception),
2024 "Exception name has bad type at constant pool %u in class file %s",
2025 checked_exception, CHECK_NULL);
2026 }
2027 }
2028 // check exceptions attribute length
2029 if (_need_verify) {
2030 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2031 sizeof(u2) * size),
2032 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2033 }
2034 return checked_exceptions_start;
2035 }
2036
2037 void ClassFileParser::throwIllegalSignature(const char* type,
2038 const Symbol* name,
2039 const Symbol* sig,
2040 TRAPS) const {
2041 assert(name != NULL, "invariant");
2042 assert(sig != NULL, "invariant");
2043
2044 ResourceMark rm(THREAD);
2045 Exceptions::fthrow(THREAD_AND_LOCATION,
2046 vmSymbols::java_lang_ClassFormatError(),
2047 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2048 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2049 }
2050
2051 AnnotationCollector::ID
2052 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2053 const Symbol* name) {
2054 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2055 // Privileged code can use all annotations. Other code silently drops some.
2056 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2057 loader_data->is_platform_class_loader_data() ||
2058 loader_data->is_unsafe_anonymous();
2059 switch (sid) {
2060 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2061 if (_location != _in_method) break; // only allow for methods
2062 if (!privileged) break; // only allow in privileged code
2063 return _method_CallerSensitive;
2064 }
2065 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2066 if (_location != _in_method) break; // only allow for methods
2067 if (!privileged) break; // only allow in privileged code
2068 return _method_ForceInline;
2069 }
2070 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2071 if (_location != _in_method) break; // only allow for methods
2072 if (!privileged) break; // only allow in privileged code
2073 return _method_DontInline;
2074 }
2075 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2076 if (_location != _in_method) break; // only allow for methods
2077 if (!privileged) break; // only allow in privileged code
2078 return _method_InjectedProfile;
2079 }
2080 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2081 if (_location != _in_method) break; // only allow for methods
2082 if (!privileged) break; // only allow in privileged code
2083 return _method_LambdaForm_Compiled;
2084 }
2085 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2086 if (_location != _in_method) break; // only allow for methods
2087 if (!privileged) break; // only allow in privileged code
2088 return _method_Hidden;
2089 }
2090 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2091 if (_location != _in_method) break; // only allow for methods
2092 if (!privileged) break; // only allow in privileged code
2093 return _method_HotSpotIntrinsicCandidate;
2094 }
2095 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2096 if (_location != _in_field) break; // only allow for fields
2097 if (!privileged) break; // only allow in privileged code
2098 return _field_Stable;
2099 }
2100 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2101 if (_location != _in_field && _location != _in_class) {
2102 break; // only allow for fields and classes
2103 }
2104 if (!EnableContended || (RestrictContended && !privileged)) {
2105 break; // honor privileges
2106 }
2107 return _jdk_internal_vm_annotation_Contended;
2108 }
2109 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2110 if (_location != _in_method) break; // only allow for methods
2111 if (RestrictReservedStack && !privileged) break; // honor privileges
2112 return _jdk_internal_vm_annotation_ReservedStackAccess;
2113 }
2114 default: {
2115 break;
2116 }
2117 }
2118 return AnnotationCollector::_unknown;
2119 }
2120
2121 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2122 if (is_contended())
2123 f->set_contended_group(contended_group());
2124 if (is_stable())
2125 f->set_stable(true);
2126 }
2127
2128 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2129 // If there's an error deallocate metadata for field annotations
2130 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2131 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2132 }
2133
2134 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2135 if (has_annotation(_method_CallerSensitive))
2136 m->set_caller_sensitive(true);
2137 if (has_annotation(_method_ForceInline))
2138 m->set_force_inline(true);
2139 if (has_annotation(_method_DontInline))
2140 m->set_dont_inline(true);
2141 if (has_annotation(_method_InjectedProfile))
2142 m->set_has_injected_profile(true);
2143 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2144 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2145 if (has_annotation(_method_Hidden))
2146 m->set_hidden(true);
2147 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2148 m->set_intrinsic_candidate(true);
2149 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2150 m->set_has_reserved_stack_access(true);
2151 }
2152
2153 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2154 assert(ik != NULL, "invariant");
2155 ik->set_is_contended(is_contended());
2156 }
2157
2158 #define MAX_ARGS_SIZE 255
2159 #define MAX_CODE_SIZE 65535
2160 #define INITIAL_MAX_LVT_NUMBER 256
2161
2162 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2163 *
2164 * Rules for LVT's and LVTT's are:
2165 * - There can be any number of LVT's and LVTT's.
2166 * - If there are n LVT's, it is the same as if there was just
2167 * one LVT containing all the entries from the n LVT's.
2168 * - There may be no more than one LVT entry per local variable.
2169 * Two LVT entries are 'equal' if these fields are the same:
2170 * start_pc, length, name, slot
2171 * - There may be no more than one LVTT entry per each LVT entry.
2172 * Each LVTT entry has to match some LVT entry.
2173 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2174 */
2175 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2176 int lvt_cnt,
2177 u2* const localvariable_table_length,
2178 const unsafe_u2** const localvariable_table_start,
2179 int lvtt_cnt,
2180 u2* const localvariable_type_table_length,
2181 const unsafe_u2** const localvariable_type_table_start,
2182 TRAPS) {
2183
2184 ResourceMark rm(THREAD);
2185
2186 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2187 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2188
2189 LVT_HashTable* const table = new LVT_HashTable();
2190
2191 // To fill LocalVariableTable in
2192 const Classfile_LVT_Element* cf_lvt;
2193 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2194
2195 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2196 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2197 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2198 copy_lvt_element(&cf_lvt[idx], lvt);
2199 // If no duplicates, add LVT elem in hashtable.
2200 if (table->put(*lvt, lvt) == false
2201 && _need_verify
2202 && _major_version >= JAVA_1_5_VERSION) {
2203 classfile_parse_error("Duplicated LocalVariableTable attribute "
2204 "entry for '%s' in class file %s",
2205 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2206 CHECK);
2207 }
2208 }
2209 }
2210
2211 // To merge LocalVariableTable and LocalVariableTypeTable
2212 const Classfile_LVT_Element* cf_lvtt;
2213 LocalVariableTableElement lvtt_elem;
2214
2215 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2216 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2217 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2218 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2219 LocalVariableTableElement** entry = table->get(lvtt_elem);
2220 if (entry == NULL) {
2221 if (_need_verify) {
2222 classfile_parse_error("LVTT entry for '%s' in class file %s "
2223 "does not match any LVT entry",
2224 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2225 CHECK);
2226 }
2227 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2228 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2229 "entry for '%s' in class file %s",
2230 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2231 CHECK);
2232 } else {
2233 // to add generic signatures into LocalVariableTable
2234 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2235 }
2236 }
2237 }
2238 }
2239
2240
2241 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2242 const u1* runtime_visible_annotations,
2243 int runtime_visible_annotations_length,
2244 const u1* runtime_invisible_annotations,
2245 int runtime_invisible_annotations_length,
2246 const u1* runtime_visible_parameter_annotations,
2247 int runtime_visible_parameter_annotations_length,
2248 const u1* runtime_invisible_parameter_annotations,
2249 int runtime_invisible_parameter_annotations_length,
2250 const u1* runtime_visible_type_annotations,
2251 int runtime_visible_type_annotations_length,
2252 const u1* runtime_invisible_type_annotations,
2253 int runtime_invisible_type_annotations_length,
2254 const u1* annotation_default,
2255 int annotation_default_length,
2256 TRAPS) {
2257
2258 AnnotationArray* a;
2259
2260 if (runtime_visible_annotations_length +
2261 runtime_invisible_annotations_length > 0) {
2262 a = assemble_annotations(runtime_visible_annotations,
2263 runtime_visible_annotations_length,
2264 runtime_invisible_annotations,
2265 runtime_invisible_annotations_length,
2266 CHECK);
2267 cm->set_method_annotations(a);
2268 }
2269
2270 if (runtime_visible_parameter_annotations_length +
2271 runtime_invisible_parameter_annotations_length > 0) {
2272 a = assemble_annotations(runtime_visible_parameter_annotations,
2273 runtime_visible_parameter_annotations_length,
2274 runtime_invisible_parameter_annotations,
2275 runtime_invisible_parameter_annotations_length,
2276 CHECK);
2277 cm->set_parameter_annotations(a);
2278 }
2279
2280 if (annotation_default_length > 0) {
2281 a = assemble_annotations(annotation_default,
2282 annotation_default_length,
2283 NULL,
2284 0,
2285 CHECK);
2286 cm->set_default_annotations(a);
2287 }
2288
2289 if (runtime_visible_type_annotations_length +
2290 runtime_invisible_type_annotations_length > 0) {
2291 a = assemble_annotations(runtime_visible_type_annotations,
2292 runtime_visible_type_annotations_length,
2293 runtime_invisible_type_annotations,
2294 runtime_invisible_type_annotations_length,
2295 CHECK);
2296 cm->set_type_annotations(a);
2297 }
2298 }
2299
2300
2301 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2302 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2303 // Method* to save footprint, so we only know the size of the resulting Method* when the
2304 // entire method attribute is parsed.
2305 //
2306 // The promoted_flags parameter is used to pass relevant access_flags
2307 // from the method back up to the containing klass. These flag values
2308 // are added to klass's access_flags.
2309
2310 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2311 bool is_interface,
2312 const ConstantPool* cp,
2313 AccessFlags* const promoted_flags,
2314 TRAPS) {
2315 assert(cfs != NULL, "invariant");
2316 assert(cp != NULL, "invariant");
2317 assert(promoted_flags != NULL, "invariant");
2318
2319 ResourceMark rm(THREAD);
2320 // Parse fixed parts:
2321 // access_flags, name_index, descriptor_index, attributes_count
2322 cfs->guarantee_more(8, CHECK_NULL);
2323
2324 int flags = cfs->get_u2_fast();
2325 const u2 name_index = cfs->get_u2_fast();
2326 const int cp_size = cp->length();
2327 check_property(
2328 valid_symbol_at(name_index),
2329 "Illegal constant pool index %u for method name in class file %s",
2330 name_index, CHECK_NULL);
2331 const Symbol* const name = cp->symbol_at(name_index);
2332 verify_legal_method_name(name, CHECK_NULL);
2333
2334 const u2 signature_index = cfs->get_u2_fast();
2335 guarantee_property(
2336 valid_symbol_at(signature_index),
2337 "Illegal constant pool index %u for method signature in class file %s",
2338 signature_index, CHECK_NULL);
2339 const Symbol* const signature = cp->symbol_at(signature_index);
2340
2341 if (name == vmSymbols::class_initializer_name()) {
2342 // We ignore the other access flags for a valid class initializer.
2343 // (JVM Spec 2nd ed., chapter 4.6)
2344 if (_major_version < 51) { // backward compatibility
2345 flags = JVM_ACC_STATIC;
2346 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2347 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2348 } else {
2349 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2350 }
2351 } else {
2352 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2353 }
2354
2355 if (name == vmSymbols::object_initializer_name() && is_interface) {
2356 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2357 }
2358
2359 int args_size = -1; // only used when _need_verify is true
2360 if (_need_verify) {
2361 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2362 verify_legal_method_signature(name, signature, CHECK_NULL);
2363 if (args_size > MAX_ARGS_SIZE) {
2364 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2365 }
2366 }
2367
2368 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2369
2370 // Default values for code and exceptions attribute elements
2371 u2 max_stack = 0;
2372 u2 max_locals = 0;
2373 u4 code_length = 0;
2374 const u1* code_start = 0;
2375 u2 exception_table_length = 0;
2376 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2377 Array<int>* exception_handlers = Universe::the_empty_int_array();
2378 u2 checked_exceptions_length = 0;
2379 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2380 CompressedLineNumberWriteStream* linenumber_table = NULL;
2381 int linenumber_table_length = 0;
2382 int total_lvt_length = 0;
2383 u2 lvt_cnt = 0;
2384 u2 lvtt_cnt = 0;
2385 bool lvt_allocated = false;
2386 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2387 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2388 u2* localvariable_table_length = NULL;
2389 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2390 u2* localvariable_type_table_length = NULL;
2391 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2392 int method_parameters_length = -1;
2393 const u1* method_parameters_data = NULL;
2394 bool method_parameters_seen = false;
2395 bool parsed_code_attribute = false;
2396 bool parsed_checked_exceptions_attribute = false;
2397 bool parsed_stackmap_attribute = false;
2398 // stackmap attribute - JDK1.5
2399 const u1* stackmap_data = NULL;
2400 int stackmap_data_length = 0;
2401 u2 generic_signature_index = 0;
2402 MethodAnnotationCollector parsed_annotations;
2403 const u1* runtime_visible_annotations = NULL;
2404 int runtime_visible_annotations_length = 0;
2405 const u1* runtime_invisible_annotations = NULL;
2406 int runtime_invisible_annotations_length = 0;
2407 const u1* runtime_visible_parameter_annotations = NULL;
2408 int runtime_visible_parameter_annotations_length = 0;
2409 const u1* runtime_invisible_parameter_annotations = NULL;
2410 int runtime_invisible_parameter_annotations_length = 0;
2411 const u1* runtime_visible_type_annotations = NULL;
2412 int runtime_visible_type_annotations_length = 0;
2413 const u1* runtime_invisible_type_annotations = NULL;
2414 int runtime_invisible_type_annotations_length = 0;
2415 bool runtime_invisible_annotations_exists = false;
2416 bool runtime_invisible_type_annotations_exists = false;
2417 bool runtime_invisible_parameter_annotations_exists = false;
2418 const u1* annotation_default = NULL;
2419 int annotation_default_length = 0;
2420
2421 // Parse code and exceptions attribute
2422 u2 method_attributes_count = cfs->get_u2_fast();
2423 while (method_attributes_count--) {
2424 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2425 const u2 method_attribute_name_index = cfs->get_u2_fast();
2426 const u4 method_attribute_length = cfs->get_u4_fast();
2427 check_property(
2428 valid_symbol_at(method_attribute_name_index),
2429 "Invalid method attribute name index %u in class file %s",
2430 method_attribute_name_index, CHECK_NULL);
2431
2432 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2433 if (method_attribute_name == vmSymbols::tag_code()) {
2434 // Parse Code attribute
2435 if (_need_verify) {
2436 guarantee_property(
2437 !access_flags.is_native() && !access_flags.is_abstract(),
2438 "Code attribute in native or abstract methods in class file %s",
2439 CHECK_NULL);
2440 }
2441 if (parsed_code_attribute) {
2442 classfile_parse_error("Multiple Code attributes in class file %s",
2443 CHECK_NULL);
2444 }
2445 parsed_code_attribute = true;
2446
2447 // Stack size, locals size, and code size
2448 if (_major_version == 45 && _minor_version <= 2) {
2449 cfs->guarantee_more(4, CHECK_NULL);
2450 max_stack = cfs->get_u1_fast();
2451 max_locals = cfs->get_u1_fast();
2452 code_length = cfs->get_u2_fast();
2453 } else {
2454 cfs->guarantee_more(8, CHECK_NULL);
2455 max_stack = cfs->get_u2_fast();
2456 max_locals = cfs->get_u2_fast();
2457 code_length = cfs->get_u4_fast();
2458 }
2459 if (_need_verify) {
2460 guarantee_property(args_size <= max_locals,
2461 "Arguments can't fit into locals in class file %s",
2462 CHECK_NULL);
2463 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2464 "Invalid method Code length %u in class file %s",
2465 code_length, CHECK_NULL);
2466 }
2467 // Code pointer
2468 code_start = cfs->current();
2469 assert(code_start != NULL, "null code start");
2470 cfs->guarantee_more(code_length, CHECK_NULL);
2471 cfs->skip_u1_fast(code_length);
2472
2473 // Exception handler table
2474 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2475 exception_table_length = cfs->get_u2_fast();
2476 if (exception_table_length > 0) {
2477 exception_table_start = parse_exception_table(cfs,
2478 code_length,
2479 exception_table_length,
2480 CHECK_NULL);
2481 }
2482
2483 // Parse additional attributes in code attribute
2484 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2485 u2 code_attributes_count = cfs->get_u2_fast();
2486
2487 unsigned int calculated_attribute_length = 0;
2488
2489 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2490 calculated_attribute_length =
2491 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2492 } else {
2493 // max_stack, locals and length are smaller in pre-version 45.2 classes
2494 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2495 }
2496 calculated_attribute_length +=
2497 code_length +
2498 sizeof(exception_table_length) +
2499 sizeof(code_attributes_count) +
2500 exception_table_length *
2501 ( sizeof(u2) + // start_pc
2502 sizeof(u2) + // end_pc
2503 sizeof(u2) + // handler_pc
2504 sizeof(u2) ); // catch_type_index
2505
2506 while (code_attributes_count--) {
2507 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2508 const u2 code_attribute_name_index = cfs->get_u2_fast();
2509 const u4 code_attribute_length = cfs->get_u4_fast();
2510 calculated_attribute_length += code_attribute_length +
2511 sizeof(code_attribute_name_index) +
2512 sizeof(code_attribute_length);
2513 check_property(valid_symbol_at(code_attribute_name_index),
2514 "Invalid code attribute name index %u in class file %s",
2515 code_attribute_name_index,
2516 CHECK_NULL);
2517 if (LoadLineNumberTables &&
2518 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2519 // Parse and compress line number table
2520 parse_linenumber_table(code_attribute_length,
2521 code_length,
2522 &linenumber_table,
2523 CHECK_NULL);
2524
2525 } else if (LoadLocalVariableTables &&
2526 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2527 // Parse local variable table
2528 if (!lvt_allocated) {
2529 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2530 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2531 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2532 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2533 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2534 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2535 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2536 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2537 lvt_allocated = true;
2538 }
2539 if (lvt_cnt == max_lvt_cnt) {
2540 max_lvt_cnt <<= 1;
2541 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2542 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2543 }
2544 localvariable_table_start[lvt_cnt] =
2545 parse_localvariable_table(cfs,
2546 code_length,
2547 max_locals,
2548 code_attribute_length,
2549 &localvariable_table_length[lvt_cnt],
2550 false, // is not LVTT
2551 CHECK_NULL);
2552 total_lvt_length += localvariable_table_length[lvt_cnt];
2553 lvt_cnt++;
2554 } else if (LoadLocalVariableTypeTables &&
2555 _major_version >= JAVA_1_5_VERSION &&
2556 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2557 if (!lvt_allocated) {
2558 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2559 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2560 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2561 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2562 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2563 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2564 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2565 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2566 lvt_allocated = true;
2567 }
2568 // Parse local variable type table
2569 if (lvtt_cnt == max_lvtt_cnt) {
2570 max_lvtt_cnt <<= 1;
2571 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2572 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2573 }
2574 localvariable_type_table_start[lvtt_cnt] =
2575 parse_localvariable_table(cfs,
2576 code_length,
2577 max_locals,
2578 code_attribute_length,
2579 &localvariable_type_table_length[lvtt_cnt],
2580 true, // is LVTT
2581 CHECK_NULL);
2582 lvtt_cnt++;
2583 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2584 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2585 // Stack map is only needed by the new verifier in JDK1.5.
2586 if (parsed_stackmap_attribute) {
2587 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2588 }
2589 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2590 stackmap_data_length = code_attribute_length;
2591 parsed_stackmap_attribute = true;
2592 } else {
2593 // Skip unknown attributes
2594 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2595 }
2596 }
2597 // check method attribute length
2598 if (_need_verify) {
2599 guarantee_property(method_attribute_length == calculated_attribute_length,
2600 "Code segment has wrong length in class file %s",
2601 CHECK_NULL);
2602 }
2603 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2604 // Parse Exceptions attribute
2605 if (parsed_checked_exceptions_attribute) {
2606 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2607 CHECK_NULL);
2608 }
2609 parsed_checked_exceptions_attribute = true;
2610 checked_exceptions_start =
2611 parse_checked_exceptions(cfs,
2612 &checked_exceptions_length,
2613 method_attribute_length,
2614 CHECK_NULL);
2615 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2616 // reject multiple method parameters
2617 if (method_parameters_seen) {
2618 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2619 CHECK_NULL);
2620 }
2621 method_parameters_seen = true;
2622 method_parameters_length = cfs->get_u1_fast();
2623 const u2 real_length = (method_parameters_length * 4u) + 1u;
2624 if (method_attribute_length != real_length) {
2625 classfile_parse_error(
2626 "Invalid MethodParameters method attribute length %u in class file",
2627 method_attribute_length, CHECK_NULL);
2628 }
2629 method_parameters_data = cfs->current();
2630 cfs->skip_u2_fast(method_parameters_length);
2631 cfs->skip_u2_fast(method_parameters_length);
2632 // ignore this attribute if it cannot be reflected
2633 if (!SystemDictionary::Parameter_klass_loaded())
2634 method_parameters_length = -1;
2635 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2636 if (method_attribute_length != 0) {
2637 classfile_parse_error(
2638 "Invalid Synthetic method attribute length %u in class file %s",
2639 method_attribute_length, CHECK_NULL);
2640 }
2641 // Should we check that there hasn't already been a synthetic attribute?
2642 access_flags.set_is_synthetic();
2643 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2644 if (method_attribute_length != 0) {
2645 classfile_parse_error(
2646 "Invalid Deprecated method attribute length %u in class file %s",
2647 method_attribute_length, CHECK_NULL);
2648 }
2649 } else if (_major_version >= JAVA_1_5_VERSION) {
2650 if (method_attribute_name == vmSymbols::tag_signature()) {
2651 if (generic_signature_index != 0) {
2652 classfile_parse_error(
2653 "Multiple Signature attributes for method in class file %s",
2654 CHECK_NULL);
2655 }
2656 if (method_attribute_length != 2) {
2657 classfile_parse_error(
2658 "Invalid Signature attribute length %u in class file %s",
2659 method_attribute_length, CHECK_NULL);
2660 }
2661 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2662 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2663 if (runtime_visible_annotations != NULL) {
2664 classfile_parse_error(
2665 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2666 CHECK_NULL);
2667 }
2668 runtime_visible_annotations_length = method_attribute_length;
2669 runtime_visible_annotations = cfs->current();
2670 assert(runtime_visible_annotations != NULL, "null visible annotations");
2671 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2672 parse_annotations(cp,
2673 runtime_visible_annotations,
2674 runtime_visible_annotations_length,
2675 &parsed_annotations,
2676 _loader_data,
2677 CHECK_NULL);
2678 cfs->skip_u1_fast(runtime_visible_annotations_length);
2679 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2680 if (runtime_invisible_annotations_exists) {
2681 classfile_parse_error(
2682 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2683 CHECK_NULL);
2684 }
2685 runtime_invisible_annotations_exists = true;
2686 if (PreserveAllAnnotations) {
2687 runtime_invisible_annotations_length = method_attribute_length;
2688 runtime_invisible_annotations = cfs->current();
2689 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2690 }
2691 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2692 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2693 if (runtime_visible_parameter_annotations != NULL) {
2694 classfile_parse_error(
2695 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2696 CHECK_NULL);
2697 }
2698 runtime_visible_parameter_annotations_length = method_attribute_length;
2699 runtime_visible_parameter_annotations = cfs->current();
2700 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2701 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2702 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2703 if (runtime_invisible_parameter_annotations_exists) {
2704 classfile_parse_error(
2705 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2706 CHECK_NULL);
2707 }
2708 runtime_invisible_parameter_annotations_exists = true;
2709 if (PreserveAllAnnotations) {
2710 runtime_invisible_parameter_annotations_length = method_attribute_length;
2711 runtime_invisible_parameter_annotations = cfs->current();
2712 assert(runtime_invisible_parameter_annotations != NULL,
2713 "null invisible parameter annotations");
2714 }
2715 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2716 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2717 if (annotation_default != NULL) {
2718 classfile_parse_error(
2719 "Multiple AnnotationDefault attributes for method in class file %s",
2720 CHECK_NULL);
2721 }
2722 annotation_default_length = method_attribute_length;
2723 annotation_default = cfs->current();
2724 assert(annotation_default != NULL, "null annotation default");
2725 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2726 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2727 if (runtime_visible_type_annotations != NULL) {
2728 classfile_parse_error(
2729 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2730 CHECK_NULL);
2731 }
2732 runtime_visible_type_annotations_length = method_attribute_length;
2733 runtime_visible_type_annotations = cfs->current();
2734 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2735 // No need for the VM to parse Type annotations
2736 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2737 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2738 if (runtime_invisible_type_annotations_exists) {
2739 classfile_parse_error(
2740 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2741 CHECK_NULL);
2742 } else {
2743 runtime_invisible_type_annotations_exists = true;
2744 }
2745 if (PreserveAllAnnotations) {
2746 runtime_invisible_type_annotations_length = method_attribute_length;
2747 runtime_invisible_type_annotations = cfs->current();
2748 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2749 }
2750 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2751 } else {
2752 // Skip unknown attributes
2753 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2754 }
2755 } else {
2756 // Skip unknown attributes
2757 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2758 }
2759 }
2760
2761 if (linenumber_table != NULL) {
2762 linenumber_table->write_terminator();
2763 linenumber_table_length = linenumber_table->position();
2764 }
2765
2766 // Make sure there's at least one Code attribute in non-native/non-abstract method
2767 if (_need_verify) {
2768 guarantee_property(access_flags.is_native() ||
2769 access_flags.is_abstract() ||
2770 parsed_code_attribute,
2771 "Absent Code attribute in method that is not native or abstract in class file %s",
2772 CHECK_NULL);
2773 }
2774
2775 // All sizing information for a Method* is finally available, now create it
2776 InlineTableSizes sizes(
2777 total_lvt_length,
2778 linenumber_table_length,
2779 exception_table_length,
2780 checked_exceptions_length,
2781 method_parameters_length,
2782 generic_signature_index,
2783 runtime_visible_annotations_length +
2784 runtime_invisible_annotations_length,
2785 runtime_visible_parameter_annotations_length +
2786 runtime_invisible_parameter_annotations_length,
2787 runtime_visible_type_annotations_length +
2788 runtime_invisible_type_annotations_length,
2789 annotation_default_length,
2790 0);
2791
2792 Method* const m = Method::allocate(_loader_data,
2793 code_length,
2794 access_flags,
2795 &sizes,
2796 ConstMethod::NORMAL,
2797 CHECK_NULL);
2798
2799 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2800
2801 // Fill in information from fixed part (access_flags already set)
2802 m->set_constants(_cp);
2803 m->set_name_index(name_index);
2804 m->set_signature_index(signature_index);
2805
2806 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2807 m->constMethod()->set_result_type(rtf.type());
2808
2809 if (args_size >= 0) {
2810 m->set_size_of_parameters(args_size);
2811 } else {
2812 m->compute_size_of_parameters(THREAD);
2813 }
2814 #ifdef ASSERT
2815 if (args_size >= 0) {
2816 m->compute_size_of_parameters(THREAD);
2817 assert(args_size == m->size_of_parameters(), "");
2818 }
2819 #endif
2820
2821 // Fill in code attribute information
2822 m->set_max_stack(max_stack);
2823 m->set_max_locals(max_locals);
2824 if (stackmap_data != NULL) {
2825 m->constMethod()->copy_stackmap_data(_loader_data,
2826 (u1*)stackmap_data,
2827 stackmap_data_length,
2828 CHECK_NULL);
2829 }
2830
2831 // Copy byte codes
2832 m->set_code((u1*)code_start);
2833
2834 // Copy line number table
2835 if (linenumber_table != NULL) {
2836 memcpy(m->compressed_linenumber_table(),
2837 linenumber_table->buffer(),
2838 linenumber_table_length);
2839 }
2840
2841 // Copy exception table
2842 if (exception_table_length > 0) {
2843 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2844 m->exception_table_start(),
2845 exception_table_length * sizeof(ExceptionTableElement),
2846 sizeof(u2));
2847 }
2848
2849 // Copy method parameters
2850 if (method_parameters_length > 0) {
2851 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2852 for (int i = 0; i < method_parameters_length; i++) {
2853 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2854 method_parameters_data += 2;
2855 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2856 method_parameters_data += 2;
2857 }
2858 }
2859
2860 // Copy checked exceptions
2861 if (checked_exceptions_length > 0) {
2862 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2863 m->checked_exceptions_start(),
2864 checked_exceptions_length * sizeof(CheckedExceptionElement),
2865 sizeof(u2));
2866 }
2867
2868 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2869 if (total_lvt_length > 0) {
2870 promoted_flags->set_has_localvariable_table();
2871 copy_localvariable_table(m->constMethod(),
2872 lvt_cnt,
2873 localvariable_table_length,
2874 localvariable_table_start,
2875 lvtt_cnt,
2876 localvariable_type_table_length,
2877 localvariable_type_table_start,
2878 CHECK_NULL);
2879 }
2880
2881 if (parsed_annotations.has_any_annotations())
2882 parsed_annotations.apply_to(m);
2883
2884 // Copy annotations
2885 copy_method_annotations(m->constMethod(),
2886 runtime_visible_annotations,
2887 runtime_visible_annotations_length,
2888 runtime_invisible_annotations,
2889 runtime_invisible_annotations_length,
2890 runtime_visible_parameter_annotations,
2891 runtime_visible_parameter_annotations_length,
2892 runtime_invisible_parameter_annotations,
2893 runtime_invisible_parameter_annotations_length,
2894 runtime_visible_type_annotations,
2895 runtime_visible_type_annotations_length,
2896 runtime_invisible_type_annotations,
2897 runtime_invisible_type_annotations_length,
2898 annotation_default,
2899 annotation_default_length,
2900 CHECK_NULL);
2901
2902 if (name == vmSymbols::finalize_method_name() &&
2903 signature == vmSymbols::void_method_signature()) {
2904 if (m->is_empty_method()) {
2905 _has_empty_finalizer = true;
2906 } else {
2907 _has_finalizer = true;
2908 }
2909 }
2910 if (name == vmSymbols::object_initializer_name() &&
2911 signature == vmSymbols::void_method_signature() &&
2912 m->is_vanilla_constructor()) {
2913 _has_vanilla_constructor = true;
2914 }
2915
2916 NOT_PRODUCT(m->verify());
2917 return m;
2918 }
2919
2920
2921 // The promoted_flags parameter is used to pass relevant access_flags
2922 // from the methods back up to the containing klass. These flag values
2923 // are added to klass's access_flags.
2924 // Side-effects: populates the _methods field in the parser
2925 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2926 bool is_interface,
2927 AccessFlags* promoted_flags,
2928 bool* has_final_method,
2929 bool* declares_nonstatic_concrete_methods,
2930 TRAPS) {
2931 assert(cfs != NULL, "invariant");
2932 assert(promoted_flags != NULL, "invariant");
2933 assert(has_final_method != NULL, "invariant");
2934 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2935
2936 assert(NULL == _methods, "invariant");
2937
2938 cfs->guarantee_more(2, CHECK); // length
2939 const u2 length = cfs->get_u2_fast();
2940 if (length == 0) {
2941 _methods = Universe::the_empty_method_array();
2942 } else {
2943 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2944 length,
2945 NULL,
2946 CHECK);
2947
2948 for (int index = 0; index < length; index++) {
2949 Method* method = parse_method(cfs,
2950 is_interface,
2951 _cp,
2952 promoted_flags,
2953 CHECK);
2954
2955 if (method->is_final()) {
2956 *has_final_method = true;
2957 }
2958 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2959 // used for interface initialization, and default method inheritance analysis
2960 if (is_interface && !(*declares_nonstatic_concrete_methods)
2961 && !method->is_abstract() && !method->is_static()) {
2962 *declares_nonstatic_concrete_methods = true;
2963 }
2964 _methods->at_put(index, method);
2965 }
2966
2967 if (_need_verify && length > 1) {
2968 // Check duplicated methods
2969 ResourceMark rm(THREAD);
2970 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2971 THREAD, NameSigHash*, HASH_ROW_SIZE);
2972 initialize_hashtable(names_and_sigs);
2973 bool dup = false;
2974 const Symbol* name = NULL;
2975 const Symbol* sig = NULL;
2976 {
2977 debug_only(NoSafepointVerifier nsv;)
2978 for (int i = 0; i < length; i++) {
2979 const Method* const m = _methods->at(i);
2980 name = m->name();
2981 sig = m->signature();
2982 // If no duplicates, add name/signature in hashtable names_and_sigs.
2983 if (!put_after_lookup(name, sig, names_and_sigs)) {
2984 dup = true;
2985 break;
2986 }
2987 }
2988 }
2989 if (dup) {
2990 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2991 name->as_C_string(), sig->as_klass_external_name(), CHECK);
2992 }
2993 }
2994 }
2995 }
2996
2997 static const intArray* sort_methods(Array<Method*>* methods) {
2998 const int length = methods->length();
2999 // If JVMTI original method ordering or sharing is enabled we have to
3000 // remember the original class file ordering.
3001 // We temporarily use the vtable_index field in the Method* to store the
3002 // class file index, so we can read in after calling qsort.
3003 // Put the method ordering in the shared archive.
3004 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3005 for (int index = 0; index < length; index++) {
3006 Method* const m = methods->at(index);
3007 assert(!m->valid_vtable_index(), "vtable index should not be set");
3008 m->set_vtable_index(index);
3009 }
3010 }
3011 // Sort method array by ascending method name (for faster lookups & vtable construction)
3012 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3013 Method::sort_methods(methods);
3014
3015 intArray* method_ordering = NULL;
3016 // If JVMTI original method ordering or sharing is enabled construct int
3017 // array remembering the original ordering
3018 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3019 method_ordering = new intArray(length, length, -1);
3020 for (int index = 0; index < length; index++) {
3021 Method* const m = methods->at(index);
3022 const int old_index = m->vtable_index();
3023 assert(old_index >= 0 && old_index < length, "invalid method index");
3024 method_ordering->at_put(index, old_index);
3025 m->set_vtable_index(Method::invalid_vtable_index);
3026 }
3027 }
3028 return method_ordering;
3029 }
3030
3031 // Parse generic_signature attribute for methods and fields
3032 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3033 TRAPS) {
3034 assert(cfs != NULL, "invariant");
3035
3036 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3037 const u2 generic_signature_index = cfs->get_u2_fast();
3038 check_property(
3039 valid_symbol_at(generic_signature_index),
3040 "Invalid Signature attribute at constant pool index %u in class file %s",
3041 generic_signature_index, CHECK_0);
3042 return generic_signature_index;
3043 }
3044
3045 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3046 TRAPS) {
3047
3048 assert(cfs != NULL, "invariant");
3049
3050 cfs->guarantee_more(2, CHECK); // sourcefile_index
3051 const u2 sourcefile_index = cfs->get_u2_fast();
3052 check_property(
3053 valid_symbol_at(sourcefile_index),
3054 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3055 sourcefile_index, CHECK);
3056 set_class_sourcefile_index(sourcefile_index);
3057 }
3058
3059 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3060 int length,
3061 TRAPS) {
3062 assert(cfs != NULL, "invariant");
3063
3064 const u1* const sde_buffer = cfs->current();
3065 assert(sde_buffer != NULL, "null sde buffer");
3066
3067 // Don't bother storing it if there is no way to retrieve it
3068 if (JvmtiExport::can_get_source_debug_extension()) {
3069 assert((length+1) > length, "Overflow checking");
3070 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3071 for (int i = 0; i < length; i++) {
3072 sde[i] = sde_buffer[i];
3073 }
3074 sde[length] = '\0';
3075 set_class_sde_buffer((const char*)sde, length);
3076 }
3077 // Got utf8 string, set stream position forward
3078 cfs->skip_u1(length, CHECK);
3079 }
3080
3081
3082 // Inner classes can be static, private or protected (classic VM does this)
3083 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3084 JVM_ACC_PRIVATE | \
3085 JVM_ACC_PROTECTED | \
3086 JVM_ACC_STATIC \
3087 )
3088
3089 // Return number of classes in the inner classes attribute table
3090 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3091 const u1* const inner_classes_attribute_start,
3092 bool parsed_enclosingmethod_attribute,
3093 u2 enclosing_method_class_index,
3094 u2 enclosing_method_method_index,
3095 TRAPS) {
3096 const u1* const current_mark = cfs->current();
3097 u2 length = 0;
3098 if (inner_classes_attribute_start != NULL) {
3099 cfs->set_current(inner_classes_attribute_start);
3100 cfs->guarantee_more(2, CHECK_0); // length
3101 length = cfs->get_u2_fast();
3102 }
3103
3104 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3105 // method data:
3106 // [inner_class_info_index,
3107 // outer_class_info_index,
3108 // inner_name_index,
3109 // inner_class_access_flags,
3110 // ...
3111 // enclosing_method_class_index,
3112 // enclosing_method_method_index]
3113 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3114 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3115 _inner_classes = inner_classes;
3116
3117 int index = 0;
3118 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3119 for (int n = 0; n < length; n++) {
3120 // Inner class index
3121 const u2 inner_class_info_index = cfs->get_u2_fast();
3122 check_property(
3123 valid_klass_reference_at(inner_class_info_index),
3124 "inner_class_info_index %u has bad constant type in class file %s",
3125 inner_class_info_index, CHECK_0);
3126 // Outer class index
3127 const u2 outer_class_info_index = cfs->get_u2_fast();
3128 check_property(
3129 outer_class_info_index == 0 ||
3130 valid_klass_reference_at(outer_class_info_index),
3131 "outer_class_info_index %u has bad constant type in class file %s",
3132 outer_class_info_index, CHECK_0);
3133 // Inner class name
3134 const u2 inner_name_index = cfs->get_u2_fast();
3135 check_property(
3136 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3137 "inner_name_index %u has bad constant type in class file %s",
3138 inner_name_index, CHECK_0);
3139 if (_need_verify) {
3140 guarantee_property(inner_class_info_index != outer_class_info_index,
3141 "Class is both outer and inner class in class file %s", CHECK_0);
3142 }
3143 // Access flags
3144 jint flags;
3145 // JVM_ACC_MODULE is defined in JDK-9 and later.
3146 if (_major_version >= JAVA_9_VERSION) {
3147 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3148 } else {
3149 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3150 }
3151 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3152 // Set abstract bit for old class files for backward compatibility
3153 flags |= JVM_ACC_ABSTRACT;
3154 }
3155 verify_legal_class_modifiers(flags, CHECK_0);
3156 AccessFlags inner_access_flags(flags);
3157
3158 inner_classes->at_put(index++, inner_class_info_index);
3159 inner_classes->at_put(index++, outer_class_info_index);
3160 inner_classes->at_put(index++, inner_name_index);
3161 inner_classes->at_put(index++, inner_access_flags.as_short());
3162 }
3163
3164 // 4347400: make sure there's no duplicate entry in the classes array
3165 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3166 for(int i = 0; i < length * 4; i += 4) {
3167 for(int j = i + 4; j < length * 4; j += 4) {
3168 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3169 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3170 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3171 inner_classes->at(i+3) != inner_classes->at(j+3)),
3172 "Duplicate entry in InnerClasses in class file %s",
3173 CHECK_0);
3174 }
3175 }
3176 }
3177
3178 // Set EnclosingMethod class and method indexes.
3179 if (parsed_enclosingmethod_attribute) {
3180 inner_classes->at_put(index++, enclosing_method_class_index);
3181 inner_classes->at_put(index++, enclosing_method_method_index);
3182 }
3183 assert(index == size, "wrong size");
3184
3185 // Restore buffer's current position.
3186 cfs->set_current(current_mark);
3187
3188 return length;
3189 }
3190
3191 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3192 const u1* const nest_members_attribute_start,
3193 TRAPS) {
3194 const u1* const current_mark = cfs->current();
3195 u2 length = 0;
3196 if (nest_members_attribute_start != NULL) {
3197 cfs->set_current(nest_members_attribute_start);
3198 cfs->guarantee_more(2, CHECK_0); // length
3199 length = cfs->get_u2_fast();
3200 }
3201 const int size = length;
3202 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3203 _nest_members = nest_members;
3204
3205 int index = 0;
3206 cfs->guarantee_more(2 * length, CHECK_0);
3207 for (int n = 0; n < length; n++) {
3208 const u2 class_info_index = cfs->get_u2_fast();
3209 check_property(
3210 valid_klass_reference_at(class_info_index),
3211 "Nest member class_info_index %u has bad constant type in class file %s",
3212 class_info_index, CHECK_0);
3213 nest_members->at_put(index++, class_info_index);
3214 }
3215 assert(index == size, "wrong size");
3216
3217 // Restore buffer's current position.
3218 cfs->set_current(current_mark);
3219
3220 return length;
3221 }
3222
3223 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3224 set_class_synthetic_flag(true);
3225 }
3226
3227 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3228 assert(cfs != NULL, "invariant");
3229
3230 const u2 signature_index = cfs->get_u2(CHECK);
3231 check_property(
3232 valid_symbol_at(signature_index),
3233 "Invalid constant pool index %u in Signature attribute in class file %s",
3234 signature_index, CHECK);
3235 set_class_generic_signature_index(signature_index);
3236 }
3237
3238 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3239 ConstantPool* cp,
3240 u4 attribute_byte_length,
3241 TRAPS) {
3242 assert(cfs != NULL, "invariant");
3243 assert(cp != NULL, "invariant");
3244
3245 const u1* const current_start = cfs->current();
3246
3247 guarantee_property(attribute_byte_length >= sizeof(u2),
3248 "Invalid BootstrapMethods attribute length %u in class file %s",
3249 attribute_byte_length,
3250 CHECK);
3251
3252 cfs->guarantee_more(attribute_byte_length, CHECK);
3253
3254 const int attribute_array_length = cfs->get_u2_fast();
3255
3256 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3257 "Short length on BootstrapMethods in class file %s",
3258 CHECK);
3259
3260
3261 // The attribute contains a counted array of counted tuples of shorts,
3262 // represending bootstrap specifiers:
3263 // length*{bootstrap_method_index, argument_count*{argument_index}}
3264 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3265 // operand_count = number of shorts in attr, except for leading length
3266
3267 // The attribute is copied into a short[] array.
3268 // The array begins with a series of short[2] pairs, one for each tuple.
3269 const int index_size = (attribute_array_length * 2);
3270
3271 Array<u2>* const operands =
3272 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3273
3274 // Eagerly assign operands so they will be deallocated with the constant
3275 // pool if there is an error.
3276 cp->set_operands(operands);
3277
3278 int operand_fill_index = index_size;
3279 const int cp_size = cp->length();
3280
3281 for (int n = 0; n < attribute_array_length; n++) {
3282 // Store a 32-bit offset into the header of the operand array.
3283 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3284
3285 // Read a bootstrap specifier.
3286 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3287 const u2 bootstrap_method_index = cfs->get_u2_fast();
3288 const u2 argument_count = cfs->get_u2_fast();
3289 check_property(
3290 valid_cp_range(bootstrap_method_index, cp_size) &&
3291 cp->tag_at(bootstrap_method_index).is_method_handle(),
3292 "bootstrap_method_index %u has bad constant type in class file %s",
3293 bootstrap_method_index,
3294 CHECK);
3295
3296 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3297 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3298 CHECK);
3299
3300 operands->at_put(operand_fill_index++, bootstrap_method_index);
3301 operands->at_put(operand_fill_index++, argument_count);
3302
3303 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3304 for (int j = 0; j < argument_count; j++) {
3305 const u2 argument_index = cfs->get_u2_fast();
3306 check_property(
3307 valid_cp_range(argument_index, cp_size) &&
3308 cp->tag_at(argument_index).is_loadable_constant(),
3309 "argument_index %u has bad constant type in class file %s",
3310 argument_index,
3311 CHECK);
3312 operands->at_put(operand_fill_index++, argument_index);
3313 }
3314 }
3315 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3316 "Bad length on BootstrapMethods in class file %s",
3317 CHECK);
3318 }
3319
3320 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3321 ConstantPool* cp,
3322 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3323 TRAPS) {
3324 assert(cfs != NULL, "invariant");
3325 assert(cp != NULL, "invariant");
3326 assert(parsed_annotations != NULL, "invariant");
3327
3328 // Set inner classes attribute to default sentinel
3329 _inner_classes = Universe::the_empty_short_array();
3330 // Set nest members attribute to default sentinel
3331 _nest_members = Universe::the_empty_short_array();
3332 cfs->guarantee_more(2, CHECK); // attributes_count
3333 u2 attributes_count = cfs->get_u2_fast();
3334 bool parsed_sourcefile_attribute = false;
3335 bool parsed_innerclasses_attribute = false;
3336 bool parsed_nest_members_attribute = false;
3337 bool parsed_nest_host_attribute = false;
3338 bool parsed_enclosingmethod_attribute = false;
3339 bool parsed_bootstrap_methods_attribute = false;
3340 const u1* runtime_visible_annotations = NULL;
3341 int runtime_visible_annotations_length = 0;
3342 const u1* runtime_invisible_annotations = NULL;
3343 int runtime_invisible_annotations_length = 0;
3344 const u1* runtime_visible_type_annotations = NULL;
3345 int runtime_visible_type_annotations_length = 0;
3346 const u1* runtime_invisible_type_annotations = NULL;
3347 int runtime_invisible_type_annotations_length = 0;
3348 bool runtime_invisible_type_annotations_exists = false;
3349 bool runtime_invisible_annotations_exists = false;
3350 bool parsed_source_debug_ext_annotations_exist = false;
3351 const u1* inner_classes_attribute_start = NULL;
3352 u4 inner_classes_attribute_length = 0;
3353 u2 enclosing_method_class_index = 0;
3354 u2 enclosing_method_method_index = 0;
3355 const u1* nest_members_attribute_start = NULL;
3356 u4 nest_members_attribute_length = 0;
3357
3358 // Iterate over attributes
3359 while (attributes_count--) {
3360 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3361 const u2 attribute_name_index = cfs->get_u2_fast();
3362 const u4 attribute_length = cfs->get_u4_fast();
3363 check_property(
3364 valid_symbol_at(attribute_name_index),
3365 "Attribute name has bad constant pool index %u in class file %s",
3366 attribute_name_index, CHECK);
3367 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3368 if (tag == vmSymbols::tag_source_file()) {
3369 // Check for SourceFile tag
3370 if (_need_verify) {
3371 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3372 }
3373 if (parsed_sourcefile_attribute) {
3374 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3375 } else {
3376 parsed_sourcefile_attribute = true;
3377 }
3378 parse_classfile_sourcefile_attribute(cfs, CHECK);
3379 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3380 // Check for SourceDebugExtension tag
3381 if (parsed_source_debug_ext_annotations_exist) {
3382 classfile_parse_error(
3383 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3384 }
3385 parsed_source_debug_ext_annotations_exist = true;
3386 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3387 } else if (tag == vmSymbols::tag_inner_classes()) {
3388 // Check for InnerClasses tag
3389 if (parsed_innerclasses_attribute) {
3390 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3391 } else {
3392 parsed_innerclasses_attribute = true;
3393 }
3394 inner_classes_attribute_start = cfs->current();
3395 inner_classes_attribute_length = attribute_length;
3396 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3397 } else if (tag == vmSymbols::tag_synthetic()) {
3398 // Check for Synthetic tag
3399 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3400 if (attribute_length != 0) {
3401 classfile_parse_error(
3402 "Invalid Synthetic classfile attribute length %u in class file %s",
3403 attribute_length, CHECK);
3404 }
3405 parse_classfile_synthetic_attribute(CHECK);
3406 } else if (tag == vmSymbols::tag_deprecated()) {
3407 // Check for Deprecatd tag - 4276120
3408 if (attribute_length != 0) {
3409 classfile_parse_error(
3410 "Invalid Deprecated classfile attribute length %u in class file %s",
3411 attribute_length, CHECK);
3412 }
3413 } else if (_major_version >= JAVA_1_5_VERSION) {
3414 if (tag == vmSymbols::tag_signature()) {
3415 if (_generic_signature_index != 0) {
3416 classfile_parse_error(
3417 "Multiple Signature attributes in class file %s", CHECK);
3418 }
3419 if (attribute_length != 2) {
3420 classfile_parse_error(
3421 "Wrong Signature attribute length %u in class file %s",
3422 attribute_length, CHECK);
3423 }
3424 parse_classfile_signature_attribute(cfs, CHECK);
3425 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3426 if (runtime_visible_annotations != NULL) {
3427 classfile_parse_error(
3428 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3429 }
3430 runtime_visible_annotations_length = attribute_length;
3431 runtime_visible_annotations = cfs->current();
3432 assert(runtime_visible_annotations != NULL, "null visible annotations");
3433 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3434 parse_annotations(cp,
3435 runtime_visible_annotations,
3436 runtime_visible_annotations_length,
3437 parsed_annotations,
3438 _loader_data,
3439 CHECK);
3440 cfs->skip_u1_fast(runtime_visible_annotations_length);
3441 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3442 if (runtime_invisible_annotations_exists) {
3443 classfile_parse_error(
3444 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3445 }
3446 runtime_invisible_annotations_exists = true;
3447 if (PreserveAllAnnotations) {
3448 runtime_invisible_annotations_length = attribute_length;
3449 runtime_invisible_annotations = cfs->current();
3450 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3451 }
3452 cfs->skip_u1(attribute_length, CHECK);
3453 } else if (tag == vmSymbols::tag_enclosing_method()) {
3454 if (parsed_enclosingmethod_attribute) {
3455 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3456 } else {
3457 parsed_enclosingmethod_attribute = true;
3458 }
3459 guarantee_property(attribute_length == 4,
3460 "Wrong EnclosingMethod attribute length %u in class file %s",
3461 attribute_length, CHECK);
3462 cfs->guarantee_more(4, CHECK); // class_index, method_index
3463 enclosing_method_class_index = cfs->get_u2_fast();
3464 enclosing_method_method_index = cfs->get_u2_fast();
3465 if (enclosing_method_class_index == 0) {
3466 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3467 }
3468 // Validate the constant pool indices and types
3469 check_property(valid_klass_reference_at(enclosing_method_class_index),
3470 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3471 if (enclosing_method_method_index != 0 &&
3472 (!cp->is_within_bounds(enclosing_method_method_index) ||
3473 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3474 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3475 }
3476 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3477 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3478 if (parsed_bootstrap_methods_attribute) {
3479 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3480 }
3481 parsed_bootstrap_methods_attribute = true;
3482 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3483 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3484 if (runtime_visible_type_annotations != NULL) {
3485 classfile_parse_error(
3486 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3487 }
3488 runtime_visible_type_annotations_length = attribute_length;
3489 runtime_visible_type_annotations = cfs->current();
3490 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3491 // No need for the VM to parse Type annotations
3492 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3493 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3494 if (runtime_invisible_type_annotations_exists) {
3495 classfile_parse_error(
3496 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3497 } else {
3498 runtime_invisible_type_annotations_exists = true;
3499 }
3500 if (PreserveAllAnnotations) {
3501 runtime_invisible_type_annotations_length = attribute_length;
3502 runtime_invisible_type_annotations = cfs->current();
3503 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3504 }
3505 cfs->skip_u1(attribute_length, CHECK);
3506 } else if (_major_version >= JAVA_11_VERSION) {
3507 if (tag == vmSymbols::tag_nest_members()) {
3508 // Check for NestMembers tag
3509 if (parsed_nest_members_attribute) {
3510 classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3511 } else {
3512 parsed_nest_members_attribute = true;
3513 }
3514 if (parsed_nest_host_attribute) {
3515 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3516 }
3517 nest_members_attribute_start = cfs->current();
3518 nest_members_attribute_length = attribute_length;
3519 cfs->skip_u1(nest_members_attribute_length, CHECK);
3520 } else if (tag == vmSymbols::tag_nest_host()) {
3521 if (parsed_nest_host_attribute) {
3522 classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3523 } else {
3524 parsed_nest_host_attribute = true;
3525 }
3526 if (parsed_nest_members_attribute) {
3527 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3528 }
3529 if (_need_verify) {
3530 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3531 }
3532 cfs->guarantee_more(2, CHECK);
3533 u2 class_info_index = cfs->get_u2_fast();
3534 check_property(
3535 valid_klass_reference_at(class_info_index),
3536 "Nest-host class_info_index %u has bad constant type in class file %s",
3537 class_info_index, CHECK);
3538 _nest_host = class_info_index;
3539 } else {
3540 // Unknown attribute
3541 cfs->skip_u1(attribute_length, CHECK);
3542 }
3543 } else {
3544 // Unknown attribute
3545 cfs->skip_u1(attribute_length, CHECK);
3546 }
3547 } else {
3548 // Unknown attribute
3549 cfs->skip_u1(attribute_length, CHECK);
3550 }
3551 }
3552 _annotations = assemble_annotations(runtime_visible_annotations,
3553 runtime_visible_annotations_length,
3554 runtime_invisible_annotations,
3555 runtime_invisible_annotations_length,
3556 CHECK);
3557 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3558 runtime_visible_type_annotations_length,
3559 runtime_invisible_type_annotations,
3560 runtime_invisible_type_annotations_length,
3561 CHECK);
3562
3563 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3564 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3565 cfs,
3566 inner_classes_attribute_start,
3567 parsed_innerclasses_attribute,
3568 enclosing_method_class_index,
3569 enclosing_method_method_index,
3570 CHECK);
3571 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3572 guarantee_property(
3573 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3574 "Wrong InnerClasses attribute length in class file %s", CHECK);
3575 }
3576 }
3577
3578 if (parsed_nest_members_attribute) {
3579 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3580 cfs,
3581 nest_members_attribute_start,
3582 CHECK);
3583 if (_need_verify) {
3584 guarantee_property(
3585 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3586 "Wrong NestMembers attribute length in class file %s", CHECK);
3587 }
3588 }
3589
3590 if (_max_bootstrap_specifier_index >= 0) {
3591 guarantee_property(parsed_bootstrap_methods_attribute,
3592 "Missing BootstrapMethods attribute in class file %s", CHECK);
3593 }
3594 }
3595
3596 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3597 assert(k != NULL, "invariant");
3598
3599 if (_synthetic_flag)
3600 k->set_is_synthetic();
3601 if (_sourcefile_index != 0) {
3602 k->set_source_file_name_index(_sourcefile_index);
3603 }
3604 if (_generic_signature_index != 0) {
3605 k->set_generic_signature_index(_generic_signature_index);
3606 }
3607 if (_sde_buffer != NULL) {
3608 k->set_source_debug_extension(_sde_buffer, _sde_length);
3609 }
3610 }
3611
3612 // Create the Annotations object that will
3613 // hold the annotations array for the Klass.
3614 void ClassFileParser::create_combined_annotations(TRAPS) {
3615 if (_annotations == NULL &&
3616 _type_annotations == NULL &&
3617 _fields_annotations == NULL &&
3618 _fields_type_annotations == NULL) {
3619 // Don't create the Annotations object unnecessarily.
3620 return;
3621 }
3622
3623 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3624 annotations->set_class_annotations(_annotations);
3625 annotations->set_class_type_annotations(_type_annotations);
3626 annotations->set_fields_annotations(_fields_annotations);
3627 annotations->set_fields_type_annotations(_fields_type_annotations);
3628
3629 // This is the Annotations object that will be
3630 // assigned to InstanceKlass being constructed.
3631 _combined_annotations = annotations;
3632
3633 // The annotations arrays below has been transfered the
3634 // _combined_annotations so these fields can now be cleared.
3635 _annotations = NULL;
3636 _type_annotations = NULL;
3637 _fields_annotations = NULL;
3638 _fields_type_annotations = NULL;
3639 }
3640
3641 // Transfer ownership of metadata allocated to the InstanceKlass.
3642 void ClassFileParser::apply_parsed_class_metadata(
3643 InstanceKlass* this_klass,
3644 int java_fields_count, TRAPS) {
3645 assert(this_klass != NULL, "invariant");
3646
3647 _cp->set_pool_holder(this_klass);
3648 this_klass->set_constants(_cp);
3649 this_klass->set_fields(_fields, java_fields_count);
3650 this_klass->set_methods(_methods);
3651 this_klass->set_inner_classes(_inner_classes);
3652 this_klass->set_nest_members(_nest_members);
3653 this_klass->set_nest_host_index(_nest_host);
3654 this_klass->set_local_interfaces(_local_interfaces);
3655 this_klass->set_annotations(_combined_annotations);
3656 // Delay the setting of _transitive_interfaces until after initialize_supers() in
3657 // fill_instance_klass(). It is because the _transitive_interfaces may be shared with
3658 // its _super. If an OOM occurs while loading the current klass, its _super field
3659 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3660 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3661 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3662
3663 // Clear out these fields so they don't get deallocated by the destructor
3664 clear_class_metadata();
3665 }
3666
3667 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3668 int runtime_visible_annotations_length,
3669 const u1* const runtime_invisible_annotations,
3670 int runtime_invisible_annotations_length,
3671 TRAPS) {
3672 AnnotationArray* annotations = NULL;
3673 if (runtime_visible_annotations != NULL ||
3674 runtime_invisible_annotations != NULL) {
3675 annotations = MetadataFactory::new_array<u1>(_loader_data,
3676 runtime_visible_annotations_length +
3677 runtime_invisible_annotations_length,
3678 CHECK_(annotations));
3679 if (runtime_visible_annotations != NULL) {
3680 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3681 annotations->at_put(i, runtime_visible_annotations[i]);
3682 }
3683 }
3684 if (runtime_invisible_annotations != NULL) {
3685 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3686 int append = runtime_visible_annotations_length+i;
3687 annotations->at_put(append, runtime_invisible_annotations[i]);
3688 }
3689 }
3690 }
3691 return annotations;
3692 }
3693
3694 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3695 const int super_class_index,
3696 const bool need_verify,
3697 TRAPS) {
3698 assert(cp != NULL, "invariant");
3699 const InstanceKlass* super_klass = NULL;
3700
3701 if (super_class_index == 0) {
3702 check_property(_class_name == vmSymbols::java_lang_Object(),
3703 "Invalid superclass index %u in class file %s",
3704 super_class_index,
3705 CHECK_NULL);
3706 } else {
3707 check_property(valid_klass_reference_at(super_class_index),
3708 "Invalid superclass index %u in class file %s",
3709 super_class_index,
3710 CHECK_NULL);
3711 // The class name should be legal because it is checked when parsing constant pool.
3712 // However, make sure it is not an array type.
3713 bool is_array = false;
3714 if (cp->tag_at(super_class_index).is_klass()) {
3715 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3716 if (need_verify)
3717 is_array = super_klass->is_array_klass();
3718 } else if (need_verify) {
3719 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3720 }
3721 if (need_verify) {
3722 guarantee_property(!is_array,
3723 "Bad superclass name in class file %s", CHECK_NULL);
3724 }
3725 }
3726 return super_klass;
3727 }
3728
3729 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3730 unsigned int nonstatic_oop_map_count,
3731 int first_nonstatic_oop_offset) {
3732
3733 unsigned int map_count =
3734 NULL == super ? 0 : super->nonstatic_oop_map_count();
3735 if (nonstatic_oop_map_count > 0) {
3736 // We have oops to add to map
3737 if (map_count == 0) {
3738 map_count = nonstatic_oop_map_count;
3739 }
3740 else {
3741 // Check whether we should add a new map block or whether the last one can
3742 // be extended
3743 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3744 const OopMapBlock* const last_map = first_map + map_count - 1;
3745
3746 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3747 if (next_offset == first_nonstatic_oop_offset) {
3748 // There is no gap bettwen superklass's last oop field and first
3749 // local oop field, merge maps.
3750 nonstatic_oop_map_count -= 1;
3751 }
3752 else {
3753 // Superklass didn't end with a oop field, add extra maps
3754 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3755 }
3756 map_count += nonstatic_oop_map_count;
3757 }
3758 }
3759 return map_count;
3760 }
3761
3762 #ifndef PRODUCT
3763 static void print_field_layout(const Symbol* name,
3764 Array<u2>* fields,
3765 const constantPoolHandle& cp,
3766 int instance_size,
3767 int instance_fields_start,
3768 int instance_fields_end,
3769 int static_fields_end) {
3770
3771 assert(name != NULL, "invariant");
3772
3773 tty->print("%s: field layout\n", name->as_klass_external_name());
3774 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3775 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3776 if (!fs.access_flags().is_static()) {
3777 tty->print(" @%3d \"%s\" %s\n",
3778 fs.offset(),
3779 fs.name()->as_klass_external_name(),
3780 fs.signature()->as_klass_external_name());
3781 }
3782 }
3783 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3784 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3785 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3786 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3787 if (fs.access_flags().is_static()) {
3788 tty->print(" @%3d \"%s\" %s\n",
3789 fs.offset(),
3790 fs.name()->as_klass_external_name(),
3791 fs.signature()->as_klass_external_name());
3792 }
3793 }
3794 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3795 tty->print("\n");
3796 }
3797 #endif
3798
3799 // Values needed for oopmap and InstanceKlass creation
3800 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3801 public:
3802 int* nonstatic_oop_offsets;
3803 unsigned int* nonstatic_oop_counts;
3804 unsigned int nonstatic_oop_map_count;
3805 unsigned int total_oop_map_count;
3806 int instance_size;
3807 int nonstatic_field_size;
3808 int static_field_size;
3809 bool has_nonstatic_fields;
3810 };
3811
3812 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3813 void ClassFileParser::layout_fields(ConstantPool* cp,
3814 const FieldAllocationCount* fac,
3815 const ClassAnnotationCollector* parsed_annotations,
3816 FieldLayoutInfo* info,
3817 TRAPS) {
3818
3819 assert(cp != NULL, "invariant");
3820
3821 // Field size and offset computation
3822 int nonstatic_field_size = _super_klass == NULL ? 0 :
3823 _super_klass->nonstatic_field_size();
3824
3825 // Count the contended fields by type.
3826 //
3827 // We ignore static fields, because @Contended is not supported for them.
3828 // The layout code below will also ignore the static fields.
3829 int nonstatic_contended_count = 0;
3830 FieldAllocationCount fac_contended;
3831 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3832 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3833 if (fs.is_contended()) {
3834 fac_contended.count[atype]++;
3835 if (!fs.access_flags().is_static()) {
3836 nonstatic_contended_count++;
3837 }
3838 }
3839 }
3840
3841
3842 // Calculate the starting byte offsets
3843 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3844 int next_static_double_offset = next_static_oop_offset +
3845 ((fac->count[STATIC_OOP]) * heapOopSize);
3846 if (fac->count[STATIC_DOUBLE]) {
3847 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3848 }
3849
3850 int next_static_word_offset = next_static_double_offset +
3851 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3852 int next_static_short_offset = next_static_word_offset +
3853 ((fac->count[STATIC_WORD]) * BytesPerInt);
3854 int next_static_byte_offset = next_static_short_offset +
3855 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3856
3857 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3858 nonstatic_field_size * heapOopSize;
3859
3860 int next_nonstatic_field_offset = nonstatic_fields_start;
3861
3862 const bool is_contended_class = parsed_annotations->is_contended();
3863
3864 // Class is contended, pad before all the fields
3865 if (is_contended_class) {
3866 next_nonstatic_field_offset += ContendedPaddingWidth;
3867 }
3868
3869 // Compute the non-contended fields count.
3870 // The packing code below relies on these counts to determine if some field
3871 // can be squeezed into the alignment gap. Contended fields are obviously
3872 // exempt from that.
3873 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3874 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3875 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3876 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3877 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3878
3879 // Total non-static fields count, including every contended field
3880 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3881 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3882 fac->count[NONSTATIC_OOP];
3883
3884 const bool super_has_nonstatic_fields =
3885 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3886 const bool has_nonstatic_fields =
3887 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3888
3889
3890 // Prepare list of oops for oop map generation.
3891 //
3892 // "offset" and "count" lists are describing the set of contiguous oop
3893 // regions. offset[i] is the start of the i-th region, which then has
3894 // count[i] oops following. Before we know how many regions are required,
3895 // we pessimistically allocate the maps to fit all the oops into the
3896 // distinct regions.
3897 //
3898 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3899 // to figure out if we still need to do this.
3900 unsigned int nonstatic_oop_map_count = 0;
3901 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3902
3903 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3904 THREAD, int, max_nonstatic_oop_maps);
3905 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3906 THREAD, unsigned int, max_nonstatic_oop_maps);
3907
3908 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3909
3910 bool compact_fields = CompactFields;
3911 int allocation_style = FieldsAllocationStyle;
3912 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3913 assert(false, "0 <= FieldsAllocationStyle <= 2");
3914 allocation_style = 1; // Optimistic
3915 }
3916
3917 // The next classes have predefined hard-coded fields offsets
3918 // (see in JavaClasses::compute_hard_coded_offsets()).
3919 // Use default fields allocation order for them.
3920 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3921 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3922 _class_name == vmSymbols::java_lang_Class() ||
3923 _class_name == vmSymbols::java_lang_ClassLoader() ||
3924 _class_name == vmSymbols::java_lang_ref_Reference() ||
3925 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3926 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3927 _class_name == vmSymbols::java_lang_String() ||
3928 _class_name == vmSymbols::java_lang_Throwable() ||
3929 _class_name == vmSymbols::java_lang_Boolean() ||
3930 _class_name == vmSymbols::java_lang_Character() ||
3931 _class_name == vmSymbols::java_lang_Float() ||
3932 _class_name == vmSymbols::java_lang_Double() ||
3933 _class_name == vmSymbols::java_lang_Byte() ||
3934 _class_name == vmSymbols::java_lang_Short() ||
3935 _class_name == vmSymbols::java_lang_Integer() ||
3936 _class_name == vmSymbols::java_lang_Long())) {
3937 allocation_style = 0; // Allocate oops first
3938 compact_fields = false; // Don't compact fields
3939 }
3940
3941 int next_nonstatic_oop_offset = 0;
3942 int next_nonstatic_double_offset = 0;
3943
3944 // Rearrange fields for a given allocation style
3945 if( allocation_style == 0 ) {
3946 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3947 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3948 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3949 (nonstatic_oop_count * heapOopSize);
3950 } else if( allocation_style == 1 ) {
3951 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3952 next_nonstatic_double_offset = next_nonstatic_field_offset;
3953 } else if( allocation_style == 2 ) {
3954 // Fields allocation: oops fields in super and sub classes are together.
3955 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3956 _super_klass->nonstatic_oop_map_size() > 0 ) {
3957 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3958 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3959 const OopMapBlock* const last_map = first_map + map_count - 1;
3960 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3961 if (next_offset == next_nonstatic_field_offset) {
3962 allocation_style = 0; // allocate oops first
3963 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3964 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3965 (nonstatic_oop_count * heapOopSize);
3966 }
3967 }
3968 if( allocation_style == 2 ) {
3969 allocation_style = 1; // allocate oops last
3970 next_nonstatic_double_offset = next_nonstatic_field_offset;
3971 }
3972 } else {
3973 ShouldNotReachHere();
3974 }
3975
3976 int nonstatic_oop_space_count = 0;
3977 int nonstatic_word_space_count = 0;
3978 int nonstatic_short_space_count = 0;
3979 int nonstatic_byte_space_count = 0;
3980 int nonstatic_oop_space_offset = 0;
3981 int nonstatic_word_space_offset = 0;
3982 int nonstatic_short_space_offset = 0;
3983 int nonstatic_byte_space_offset = 0;
3984
3985 // Try to squeeze some of the fields into the gaps due to
3986 // long/double alignment.
3987 if (nonstatic_double_count > 0) {
3988 int offset = next_nonstatic_double_offset;
3989 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
3990 if (compact_fields && offset != next_nonstatic_double_offset) {
3991 // Allocate available fields into the gap before double field.
3992 int length = next_nonstatic_double_offset - offset;
3993 assert(length == BytesPerInt, "");
3994 nonstatic_word_space_offset = offset;
3995 if (nonstatic_word_count > 0) {
3996 nonstatic_word_count -= 1;
3997 nonstatic_word_space_count = 1; // Only one will fit
3998 length -= BytesPerInt;
3999 offset += BytesPerInt;
4000 }
4001 nonstatic_short_space_offset = offset;
4002 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4003 nonstatic_short_count -= 1;
4004 nonstatic_short_space_count += 1;
4005 length -= BytesPerShort;
4006 offset += BytesPerShort;
4007 }
4008 nonstatic_byte_space_offset = offset;
4009 while (length > 0 && nonstatic_byte_count > 0) {
4010 nonstatic_byte_count -= 1;
4011 nonstatic_byte_space_count += 1;
4012 length -= 1;
4013 }
4014 // Allocate oop field in the gap if there are no other fields for that.
4015 nonstatic_oop_space_offset = offset;
4016 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4017 allocation_style != 0) { // when oop fields not first
4018 nonstatic_oop_count -= 1;
4019 nonstatic_oop_space_count = 1; // Only one will fit
4020 length -= heapOopSize;
4021 offset += heapOopSize;
4022 }
4023 }
4024 }
4025
4026 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4027 (nonstatic_double_count * BytesPerLong);
4028 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4029 (nonstatic_word_count * BytesPerInt);
4030 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4031 (nonstatic_short_count * BytesPerShort);
4032 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4033 nonstatic_byte_count;
4034
4035 // let oops jump before padding with this allocation style
4036 if( allocation_style == 1 ) {
4037 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4038 if( nonstatic_oop_count > 0 ) {
4039 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4040 }
4041 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4042 }
4043
4044 // Iterate over fields again and compute correct offsets.
4045 // The field allocation type was temporarily stored in the offset slot.
4046 // oop fields are located before non-oop fields (static and non-static).
4047 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4048
4049 // skip already laid out fields
4050 if (fs.is_offset_set()) continue;
4051
4052 // contended instance fields are handled below
4053 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4054
4055 int real_offset = 0;
4056 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4057
4058 // pack the rest of the fields
4059 switch (atype) {
4060 case STATIC_OOP:
4061 real_offset = next_static_oop_offset;
4062 next_static_oop_offset += heapOopSize;
4063 break;
4064 case STATIC_BYTE:
4065 real_offset = next_static_byte_offset;
4066 next_static_byte_offset += 1;
4067 break;
4068 case STATIC_SHORT:
4069 real_offset = next_static_short_offset;
4070 next_static_short_offset += BytesPerShort;
4071 break;
4072 case STATIC_WORD:
4073 real_offset = next_static_word_offset;
4074 next_static_word_offset += BytesPerInt;
4075 break;
4076 case STATIC_DOUBLE:
4077 real_offset = next_static_double_offset;
4078 next_static_double_offset += BytesPerLong;
4079 break;
4080 case NONSTATIC_OOP:
4081 if( nonstatic_oop_space_count > 0 ) {
4082 real_offset = nonstatic_oop_space_offset;
4083 nonstatic_oop_space_offset += heapOopSize;
4084 nonstatic_oop_space_count -= 1;
4085 } else {
4086 real_offset = next_nonstatic_oop_offset;
4087 next_nonstatic_oop_offset += heapOopSize;
4088 }
4089
4090 // Record this oop in the oop maps
4091 if( nonstatic_oop_map_count > 0 &&
4092 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4093 real_offset -
4094 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4095 heapOopSize ) {
4096 // This oop is adjacent to the previous one, add to current oop map
4097 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4098 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4099 } else {
4100 // This oop is not adjacent to the previous one, create new oop map
4101 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4102 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4103 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4104 nonstatic_oop_map_count += 1;
4105 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4106 first_nonstatic_oop_offset = real_offset;
4107 }
4108 }
4109 break;
4110 case NONSTATIC_BYTE:
4111 if( nonstatic_byte_space_count > 0 ) {
4112 real_offset = nonstatic_byte_space_offset;
4113 nonstatic_byte_space_offset += 1;
4114 nonstatic_byte_space_count -= 1;
4115 } else {
4116 real_offset = next_nonstatic_byte_offset;
4117 next_nonstatic_byte_offset += 1;
4118 }
4119 break;
4120 case NONSTATIC_SHORT:
4121 if( nonstatic_short_space_count > 0 ) {
4122 real_offset = nonstatic_short_space_offset;
4123 nonstatic_short_space_offset += BytesPerShort;
4124 nonstatic_short_space_count -= 1;
4125 } else {
4126 real_offset = next_nonstatic_short_offset;
4127 next_nonstatic_short_offset += BytesPerShort;
4128 }
4129 break;
4130 case NONSTATIC_WORD:
4131 if( nonstatic_word_space_count > 0 ) {
4132 real_offset = nonstatic_word_space_offset;
4133 nonstatic_word_space_offset += BytesPerInt;
4134 nonstatic_word_space_count -= 1;
4135 } else {
4136 real_offset = next_nonstatic_word_offset;
4137 next_nonstatic_word_offset += BytesPerInt;
4138 }
4139 break;
4140 case NONSTATIC_DOUBLE:
4141 real_offset = next_nonstatic_double_offset;
4142 next_nonstatic_double_offset += BytesPerLong;
4143 break;
4144 default:
4145 ShouldNotReachHere();
4146 }
4147 fs.set_offset(real_offset);
4148 }
4149
4150
4151 // Handle the contended cases.
4152 //
4153 // Each contended field should not intersect the cache line with another contended field.
4154 // In the absence of alignment information, we end up with pessimistically separating
4155 // the fields with full-width padding.
4156 //
4157 // Additionally, this should not break alignment for the fields, so we round the alignment up
4158 // for each field.
4159 if (nonstatic_contended_count > 0) {
4160
4161 // if there is at least one contended field, we need to have pre-padding for them
4162 next_nonstatic_padded_offset += ContendedPaddingWidth;
4163
4164 // collect all contended groups
4165 ResourceBitMap bm(cp->size());
4166 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4167 // skip already laid out fields
4168 if (fs.is_offset_set()) continue;
4169
4170 if (fs.is_contended()) {
4171 bm.set_bit(fs.contended_group());
4172 }
4173 }
4174
4175 int current_group = -1;
4176 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4177
4178 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4179
4180 // skip already laid out fields
4181 if (fs.is_offset_set()) continue;
4182
4183 // skip non-contended fields and fields from different group
4184 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4185
4186 // handle statics below
4187 if (fs.access_flags().is_static()) continue;
4188
4189 int real_offset = 0;
4190 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4191
4192 switch (atype) {
4193 case NONSTATIC_BYTE:
4194 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4195 real_offset = next_nonstatic_padded_offset;
4196 next_nonstatic_padded_offset += 1;
4197 break;
4198
4199 case NONSTATIC_SHORT:
4200 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4201 real_offset = next_nonstatic_padded_offset;
4202 next_nonstatic_padded_offset += BytesPerShort;
4203 break;
4204
4205 case NONSTATIC_WORD:
4206 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4207 real_offset = next_nonstatic_padded_offset;
4208 next_nonstatic_padded_offset += BytesPerInt;
4209 break;
4210
4211 case NONSTATIC_DOUBLE:
4212 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4213 real_offset = next_nonstatic_padded_offset;
4214 next_nonstatic_padded_offset += BytesPerLong;
4215 break;
4216
4217 case NONSTATIC_OOP:
4218 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4219 real_offset = next_nonstatic_padded_offset;
4220 next_nonstatic_padded_offset += heapOopSize;
4221
4222 // Record this oop in the oop maps
4223 if( nonstatic_oop_map_count > 0 &&
4224 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4225 real_offset -
4226 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4227 heapOopSize ) {
4228 // This oop is adjacent to the previous one, add to current oop map
4229 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4230 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4231 } else {
4232 // This oop is not adjacent to the previous one, create new oop map
4233 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4234 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4235 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4236 nonstatic_oop_map_count += 1;
4237 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4238 first_nonstatic_oop_offset = real_offset;
4239 }
4240 }
4241 break;
4242
4243 default:
4244 ShouldNotReachHere();
4245 }
4246
4247 if (fs.contended_group() == 0) {
4248 // Contended group defines the equivalence class over the fields:
4249 // the fields within the same contended group are not inter-padded.
4250 // The only exception is default group, which does not incur the
4251 // equivalence, and so requires intra-padding.
4252 next_nonstatic_padded_offset += ContendedPaddingWidth;
4253 }
4254
4255 fs.set_offset(real_offset);
4256 } // for
4257
4258 // Start laying out the next group.
4259 // Note that this will effectively pad the last group in the back;
4260 // this is expected to alleviate memory contention effects for
4261 // subclass fields and/or adjacent object.
4262 // If this was the default group, the padding is already in place.
4263 if (current_group != 0) {
4264 next_nonstatic_padded_offset += ContendedPaddingWidth;
4265 }
4266 }
4267
4268 // handle static fields
4269 }
4270
4271 // Entire class is contended, pad in the back.
4272 // This helps to alleviate memory contention effects for subclass fields
4273 // and/or adjacent object.
4274 if (is_contended_class) {
4275 next_nonstatic_padded_offset += ContendedPaddingWidth;
4276 }
4277
4278 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4279
4280 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, heapOopSize);
4281 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4282 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4283
4284 int static_field_size = (static_fields_end -
4285 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4286 nonstatic_field_size = nonstatic_field_size +
4287 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4288
4289 int instance_size = align_object_size(instance_end / wordSize);
4290
4291 assert(instance_size == align_object_size(align_up(
4292 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4293 wordSize) / wordSize), "consistent layout helper value");
4294
4295 // Invariant: nonstatic_field end/start should only change if there are
4296 // nonstatic fields in the class, or if the class is contended. We compare
4297 // against the non-aligned value, so that end alignment will not fail the
4298 // assert without actually having the fields.
4299 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4300 is_contended_class ||
4301 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4302
4303 // Number of non-static oop map blocks allocated at end of klass.
4304 const unsigned int total_oop_map_count =
4305 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4306 first_nonstatic_oop_offset);
4307
4308 #ifndef PRODUCT
4309 if (PrintFieldLayout) {
4310 print_field_layout(_class_name,
4311 _fields,
4312 cp,
4313 instance_size,
4314 nonstatic_fields_start,
4315 nonstatic_fields_end,
4316 static_fields_end);
4317 }
4318
4319 #endif
4320 // Pass back information needed for InstanceKlass creation
4321 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4322 info->nonstatic_oop_counts = nonstatic_oop_counts;
4323 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4324 info->total_oop_map_count = total_oop_map_count;
4325 info->instance_size = instance_size;
4326 info->static_field_size = static_field_size;
4327 info->nonstatic_field_size = nonstatic_field_size;
4328 info->has_nonstatic_fields = has_nonstatic_fields;
4329 }
4330
4331 static void fill_oop_maps(const InstanceKlass* k,
4332 unsigned int nonstatic_oop_map_count,
4333 const int* nonstatic_oop_offsets,
4334 const unsigned int* nonstatic_oop_counts) {
4335
4336 assert(k != NULL, "invariant");
4337
4338 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4339 const InstanceKlass* const super = k->superklass();
4340 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4341 if (super_count > 0) {
4342 // Copy maps from superklass
4343 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4344 for (unsigned int i = 0; i < super_count; ++i) {
4345 *this_oop_map++ = *super_oop_map++;
4346 }
4347 }
4348
4349 if (nonstatic_oop_map_count > 0) {
4350 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4351 // The counts differ because there is no gap between superklass's last oop
4352 // field and the first local oop field. Extend the last oop map copied
4353 // from the superklass instead of creating new one.
4354 nonstatic_oop_map_count--;
4355 nonstatic_oop_offsets++;
4356 this_oop_map--;
4357 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4358 this_oop_map++;
4359 }
4360
4361 // Add new map blocks, fill them
4362 while (nonstatic_oop_map_count-- > 0) {
4363 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4364 this_oop_map->set_count(*nonstatic_oop_counts++);
4365 this_oop_map++;
4366 }
4367 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4368 this_oop_map, "sanity");
4369 }
4370 }
4371
4372
4373 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4374 assert(ik != NULL, "invariant");
4375
4376 const Klass* const super = ik->super();
4377
4378 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4379 // in which case we don't have to register objects as finalizable
4380 if (!_has_empty_finalizer) {
4381 if (_has_finalizer ||
4382 (super != NULL && super->has_finalizer())) {
4383 ik->set_has_finalizer();
4384 }
4385 }
4386
4387 #ifdef ASSERT
4388 bool f = false;
4389 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4390 vmSymbols::void_method_signature());
4391 if (m != NULL && !m->is_empty_method()) {
4392 f = true;
4393 }
4394
4395 // Spec doesn't prevent agent from redefinition of empty finalizer.
4396 // Despite the fact that it's generally bad idea and redefined finalizer
4397 // will not work as expected we shouldn't abort vm in this case
4398 if (!ik->has_redefined_this_or_super()) {
4399 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4400 }
4401 #endif
4402
4403 // Check if this klass supports the java.lang.Cloneable interface
4404 if (SystemDictionary::Cloneable_klass_loaded()) {
4405 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4406 ik->set_is_cloneable();
4407 }
4408 }
4409
4410 // Check if this klass has a vanilla default constructor
4411 if (super == NULL) {
4412 // java.lang.Object has empty default constructor
4413 ik->set_has_vanilla_constructor();
4414 } else {
4415 if (super->has_vanilla_constructor() &&
4416 _has_vanilla_constructor) {
4417 ik->set_has_vanilla_constructor();
4418 }
4419 #ifdef ASSERT
4420 bool v = false;
4421 if (super->has_vanilla_constructor()) {
4422 const Method* const constructor =
4423 ik->find_method(vmSymbols::object_initializer_name(),
4424 vmSymbols::void_method_signature());
4425 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4426 v = true;
4427 }
4428 }
4429 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4430 #endif
4431 }
4432
4433 // If it cannot be fast-path allocated, set a bit in the layout helper.
4434 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4435 assert(ik->size_helper() > 0, "layout_helper is initialized");
4436 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4437 || ik->is_abstract() || ik->is_interface()
4438 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4439 || ik->size_helper() >= FastAllocateSizeLimit) {
4440 // Forbid fast-path allocation.
4441 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4442 ik->set_layout_helper(lh);
4443 }
4444 }
4445
4446 // utility methods for appending an array with check for duplicates
4447
4448 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4449 const Array<InstanceKlass*>* const ifs) {
4450 // iterate over new interfaces
4451 for (int i = 0; i < ifs->length(); i++) {
4452 InstanceKlass* const e = ifs->at(i);
4453 assert(e->is_klass() && e->is_interface(), "just checking");
4454 // add new interface
4455 result->append_if_missing(e);
4456 }
4457 }
4458
4459 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4460 Array<InstanceKlass*>* local_ifs,
4461 ClassLoaderData* loader_data,
4462 TRAPS) {
4463 assert(local_ifs != NULL, "invariant");
4464 assert(loader_data != NULL, "invariant");
4465
4466 // Compute maximum size for transitive interfaces
4467 int max_transitive_size = 0;
4468 int super_size = 0;
4469 // Add superclass transitive interfaces size
4470 if (super != NULL) {
4471 super_size = super->transitive_interfaces()->length();
4472 max_transitive_size += super_size;
4473 }
4474 // Add local interfaces' super interfaces
4475 const int local_size = local_ifs->length();
4476 for (int i = 0; i < local_size; i++) {
4477 InstanceKlass* const l = local_ifs->at(i);
4478 max_transitive_size += l->transitive_interfaces()->length();
4479 }
4480 // Finally add local interfaces
4481 max_transitive_size += local_size;
4482 // Construct array
4483 if (max_transitive_size == 0) {
4484 // no interfaces, use canonicalized array
4485 return Universe::the_empty_instance_klass_array();
4486 } else if (max_transitive_size == super_size) {
4487 // no new local interfaces added, share superklass' transitive interface array
4488 return super->transitive_interfaces();
4489 } else if (max_transitive_size == local_size) {
4490 // only local interfaces added, share local interface array
4491 return local_ifs;
4492 } else {
4493 ResourceMark rm;
4494 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4495
4496 // Copy down from superclass
4497 if (super != NULL) {
4498 append_interfaces(result, super->transitive_interfaces());
4499 }
4500
4501 // Copy down from local interfaces' superinterfaces
4502 for (int i = 0; i < local_size; i++) {
4503 InstanceKlass* const l = local_ifs->at(i);
4504 append_interfaces(result, l->transitive_interfaces());
4505 }
4506 // Finally add local interfaces
4507 append_interfaces(result, local_ifs);
4508
4509 // length will be less than the max_transitive_size if duplicates were removed
4510 const int length = result->length();
4511 assert(length <= max_transitive_size, "just checking");
4512 Array<InstanceKlass*>* const new_result =
4513 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4514 for (int i = 0; i < length; i++) {
4515 InstanceKlass* const e = result->at(i);
4516 assert(e != NULL, "just checking");
4517 new_result->at_put(i, e);
4518 }
4519 return new_result;
4520 }
4521 }
4522
4523 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4524 assert(this_klass != NULL, "invariant");
4525 const Klass* const super = this_klass->super();
4526 if (super != NULL) {
4527
4528 // If the loader is not the boot loader then throw an exception if its
4529 // superclass is in package jdk.internal.reflect and its loader is not a
4530 // special reflection class loader
4531 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4532 assert(super->is_instance_klass(), "super is not instance klass");
4533 PackageEntry* super_package = super->package();
4534 if (super_package != NULL &&
4535 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4536 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4537 ResourceMark rm(THREAD);
4538 Exceptions::fthrow(
4539 THREAD_AND_LOCATION,
4540 vmSymbols::java_lang_IllegalAccessError(),
4541 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4542 this_klass->external_name(),
4543 this_klass->class_loader_data()->loader_name_and_id(),
4544 super->external_name());
4545 return;
4546 }
4547 }
4548
4549 Reflection::VerifyClassAccessResults vca_result =
4550 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4551 if (vca_result != Reflection::ACCESS_OK) {
4552 ResourceMark rm(THREAD);
4553 char* msg = Reflection::verify_class_access_msg(this_klass,
4554 InstanceKlass::cast(super),
4555 vca_result);
4556 if (msg == NULL) {
4557 bool same_module = (this_klass->module() == super->module());
4558 Exceptions::fthrow(
4559 THREAD_AND_LOCATION,
4560 vmSymbols::java_lang_IllegalAccessError(),
4561 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4562 this_klass->external_name(),
4563 super->is_abstract() ? "abstract " : "",
4564 super->external_name(),
4565 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4566 (same_module) ? "" : "; ",
4567 (same_module) ? "" : super->class_in_module_of_loader());
4568 } else {
4569 // Add additional message content.
4570 Exceptions::fthrow(
4571 THREAD_AND_LOCATION,
4572 vmSymbols::java_lang_IllegalAccessError(),
4573 "superclass access check failed: %s",
4574 msg);
4575 }
4576 }
4577 }
4578 }
4579
4580
4581 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4582 assert(this_klass != NULL, "invariant");
4583 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4584 const int lng = local_interfaces->length();
4585 for (int i = lng - 1; i >= 0; i--) {
4586 InstanceKlass* const k = local_interfaces->at(i);
4587 assert (k != NULL && k->is_interface(), "invalid interface");
4588 Reflection::VerifyClassAccessResults vca_result =
4589 Reflection::verify_class_access(this_klass, k, false);
4590 if (vca_result != Reflection::ACCESS_OK) {
4591 ResourceMark rm(THREAD);
4592 char* msg = Reflection::verify_class_access_msg(this_klass,
4593 k,
4594 vca_result);
4595 if (msg == NULL) {
4596 bool same_module = (this_klass->module() == k->module());
4597 Exceptions::fthrow(
4598 THREAD_AND_LOCATION,
4599 vmSymbols::java_lang_IllegalAccessError(),
4600 "class %s cannot access its superinterface %s (%s%s%s)",
4601 this_klass->external_name(),
4602 k->external_name(),
4603 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4604 (same_module) ? "" : "; ",
4605 (same_module) ? "" : k->class_in_module_of_loader());
4606 } else {
4607 // Add additional message content.
4608 Exceptions::fthrow(
4609 THREAD_AND_LOCATION,
4610 vmSymbols::java_lang_IllegalAccessError(),
4611 "superinterface check failed: %s",
4612 msg);
4613 }
4614 }
4615 }
4616 }
4617
4618
4619 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4620 assert(this_klass != NULL, "invariant");
4621 const Array<Method*>* const methods = this_klass->methods();
4622 const int num_methods = methods->length();
4623
4624 // go thru each method and check if it overrides a final method
4625 for (int index = 0; index < num_methods; index++) {
4626 const Method* const m = methods->at(index);
4627
4628 // skip private, static, and <init> methods
4629 if ((!m->is_private() && !m->is_static()) &&
4630 (m->name() != vmSymbols::object_initializer_name())) {
4631
4632 const Symbol* const name = m->name();
4633 const Symbol* const signature = m->signature();
4634 const Klass* k = this_klass->super();
4635 const Method* super_m = NULL;
4636 while (k != NULL) {
4637 // skip supers that don't have final methods.
4638 if (k->has_final_method()) {
4639 // lookup a matching method in the super class hierarchy
4640 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4641 if (super_m == NULL) {
4642 break; // didn't find any match; get out
4643 }
4644
4645 if (super_m->is_final() && !super_m->is_static() &&
4646 !super_m->access_flags().is_private()) {
4647 // matching method in super is final, and not static or private
4648 bool can_access = Reflection::verify_member_access(this_klass,
4649 super_m->method_holder(),
4650 super_m->method_holder(),
4651 super_m->access_flags(),
4652 false, false, CHECK);
4653 if (can_access) {
4654 // this class can access super final method and therefore override
4655 ResourceMark rm(THREAD);
4656 Exceptions::fthrow(THREAD_AND_LOCATION,
4657 vmSymbols::java_lang_VerifyError(),
4658 "class %s overrides final method %s.%s%s",
4659 this_klass->external_name(),
4660 super_m->method_holder()->external_name(),
4661 name->as_C_string(),
4662 signature->as_C_string()
4663 );
4664 return;
4665 }
4666 }
4667
4668 // continue to look from super_m's holder's super.
4669 k = super_m->method_holder()->super();
4670 continue;
4671 }
4672
4673 k = k->super();
4674 }
4675 }
4676 }
4677 }
4678
4679
4680 // assumes that this_klass is an interface
4681 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4682 assert(this_klass != NULL, "invariant");
4683 assert(this_klass->is_interface(), "not an interface");
4684 const Array<Method*>* methods = this_klass->methods();
4685 const int num_methods = methods->length();
4686
4687 for (int index = 0; index < num_methods; index++) {
4688 const Method* const m = methods->at(index);
4689 // if m is static and not the init method, throw a verify error
4690 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4691 ResourceMark rm(THREAD);
4692 Exceptions::fthrow(
4693 THREAD_AND_LOCATION,
4694 vmSymbols::java_lang_VerifyError(),
4695 "Illegal static method %s in interface %s",
4696 m->name()->as_C_string(),
4697 this_klass->external_name()
4698 );
4699 return;
4700 }
4701 }
4702 }
4703
4704 // utility methods for format checking
4705
4706 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4707 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4708 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4709 if (is_module) {
4710 ResourceMark rm(THREAD);
4711 Exceptions::fthrow(
4712 THREAD_AND_LOCATION,
4713 vmSymbols::java_lang_NoClassDefFoundError(),
4714 "%s is not a class because access_flag ACC_MODULE is set",
4715 _class_name->as_C_string());
4716 return;
4717 }
4718
4719 if (!_need_verify) { return; }
4720
4721 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4722 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4723 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4724 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4725 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4726 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4727 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4728
4729 if ((is_abstract && is_final) ||
4730 (is_interface && !is_abstract) ||
4731 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4732 (!is_interface && major_gte_15 && is_annotation)) {
4733 ResourceMark rm(THREAD);
4734 Exceptions::fthrow(
4735 THREAD_AND_LOCATION,
4736 vmSymbols::java_lang_ClassFormatError(),
4737 "Illegal class modifiers in class %s: 0x%X",
4738 _class_name->as_C_string(), flags
4739 );
4740 return;
4741 }
4742 }
4743
4744 static bool has_illegal_visibility(jint flags) {
4745 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4746 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4747 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4748
4749 return ((is_public && is_protected) ||
4750 (is_public && is_private) ||
4751 (is_protected && is_private));
4752 }
4753
4754 // A legal major_version.minor_version must be one of the following:
4755 //
4756 // Major_version = 45, any minor_version.
4757 // Major_version >= 46 and major_version <= current_major_version and minor_version = 0.
4758 // Major_version = current_major_version and minor_version = 65535 and --enable-preview is present.
4759 //
4760 static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4761 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4762 if (major != JAVA_MIN_SUPPORTED_VERSION) { // All 45.* are ok including 45.65535
4763 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4764 if (major != max_version) {
4765 ResourceMark rm(THREAD);
4766 Exceptions::fthrow(
4767 THREAD_AND_LOCATION,
4768 vmSymbols::java_lang_UnsupportedClassVersionError(),
4769 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4770 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4771 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4772 return;
4773 }
4774
4775 if (!Arguments::enable_preview()) {
4776 ResourceMark rm(THREAD);
4777 Exceptions::fthrow(
4778 THREAD_AND_LOCATION,
4779 vmSymbols::java_lang_UnsupportedClassVersionError(),
4780 "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4781 class_name->as_C_string(), major, minor);
4782 return;
4783 }
4784
4785 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4786 if (major > max_version) {
4787 ResourceMark rm(THREAD);
4788 Exceptions::fthrow(
4789 THREAD_AND_LOCATION,
4790 vmSymbols::java_lang_UnsupportedClassVersionError(),
4791 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4792 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4793 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4794 } else if (major < JAVA_MIN_SUPPORTED_VERSION) {
4795 ResourceMark rm(THREAD);
4796 Exceptions::fthrow(
4797 THREAD_AND_LOCATION,
4798 vmSymbols::java_lang_UnsupportedClassVersionError(),
4799 "%s (class file version %u.%u) was compiled with an invalid major version",
4800 class_name->as_C_string(), major, minor);
4801 } else if (minor != 0) {
4802 ResourceMark rm(THREAD);
4803 Exceptions::fthrow(
4804 THREAD_AND_LOCATION,
4805 vmSymbols::java_lang_UnsupportedClassVersionError(),
4806 "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4807 class_name->as_C_string(), major, minor);
4808 }
4809 }
4810 }
4811 }
4812
4813 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4814 bool is_interface,
4815 TRAPS) const {
4816 if (!_need_verify) { return; }
4817
4818 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4819 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4820 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4821 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4822 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4823 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4824 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4825 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4826 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4827
4828 bool is_illegal = false;
4829
4830 if (is_interface) {
4831 if (!is_public || !is_static || !is_final || is_private ||
4832 is_protected || is_volatile || is_transient ||
4833 (major_gte_15 && is_enum)) {
4834 is_illegal = true;
4835 }
4836 } else { // not interface
4837 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4838 is_illegal = true;
4839 }
4840 }
4841
4842 if (is_illegal) {
4843 ResourceMark rm(THREAD);
4844 Exceptions::fthrow(
4845 THREAD_AND_LOCATION,
4846 vmSymbols::java_lang_ClassFormatError(),
4847 "Illegal field modifiers in class %s: 0x%X",
4848 _class_name->as_C_string(), flags);
4849 return;
4850 }
4851 }
4852
4853 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4854 bool is_interface,
4855 const Symbol* name,
4856 TRAPS) const {
4857 if (!_need_verify) { return; }
4858
4859 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4860 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4861 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4862 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4863 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4864 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4865 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4866 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4867 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4868 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4869 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4870 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4871 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4872
4873 bool is_illegal = false;
4874
4875 if (is_interface) {
4876 if (major_gte_8) {
4877 // Class file version is JAVA_8_VERSION or later Methods of
4878 // interfaces may set any of the flags except ACC_PROTECTED,
4879 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4880 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4881 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4882 (is_native || is_protected || is_final || is_synchronized) ||
4883 // If a specific method of a class or interface has its
4884 // ACC_ABSTRACT flag set, it must not have any of its
4885 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4886 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4887 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4888 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4889 (is_abstract && (is_private || is_static || is_strict))) {
4890 is_illegal = true;
4891 }
4892 } else if (major_gte_15) {
4893 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4894 if (!is_public || is_private || is_protected || is_static || is_final ||
4895 is_synchronized || is_native || !is_abstract || is_strict) {
4896 is_illegal = true;
4897 }
4898 } else {
4899 // Class file version is pre-JAVA_1_5_VERSION
4900 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4901 is_illegal = true;
4902 }
4903 }
4904 } else { // not interface
4905 if (has_illegal_visibility(flags)) {
4906 is_illegal = true;
4907 } else {
4908 if (is_initializer) {
4909 if (is_static || is_final || is_synchronized || is_native ||
4910 is_abstract || (major_gte_15 && is_bridge)) {
4911 is_illegal = true;
4912 }
4913 } else { // not initializer
4914 if (is_abstract) {
4915 if ((is_final || is_native || is_private || is_static ||
4916 (major_gte_15 && (is_synchronized || is_strict)))) {
4917 is_illegal = true;
4918 }
4919 }
4920 }
4921 }
4922 }
4923
4924 if (is_illegal) {
4925 ResourceMark rm(THREAD);
4926 Exceptions::fthrow(
4927 THREAD_AND_LOCATION,
4928 vmSymbols::java_lang_ClassFormatError(),
4929 "Method %s in class %s has illegal modifiers: 0x%X",
4930 name->as_C_string(), _class_name->as_C_string(), flags);
4931 return;
4932 }
4933 }
4934
4935 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4936 int length,
4937 TRAPS) const {
4938 assert(_need_verify, "only called when _need_verify is true");
4939 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4940 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4941 }
4942 }
4943
4944 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4945 // In class names, '/' separates unqualified names. This is verified in this function also.
4946 // Method names also may not contain the characters '<' or '>', unless <init>
4947 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4948 // method. Because these names have been checked as special cases before
4949 // calling this method in verify_legal_method_name.
4950 //
4951 // This method is also called from the modular system APIs in modules.cpp
4952 // to verify the validity of module and package names.
4953 bool ClassFileParser::verify_unqualified_name(const char* name,
4954 unsigned int length,
4955 int type) {
4956 for (const char* p = name; p != name + length; p++) {
4957 switch(*p) {
4958 case '.':
4959 case ';':
4960 case '[':
4961 // do not permit '.', ';', or '['
4962 return false;
4963 case '/':
4964 // check for '//' or leading or trailing '/' which are not legal
4965 // unqualified name must not be empty
4966 if (type == ClassFileParser::LegalClass) {
4967 if (p == name || p+1 >= name+length || *(p+1) == '/') {
4968 return false;
4969 }
4970 } else {
4971 return false; // do not permit '/' unless it's class name
4972 }
4973 break;
4974 case '<':
4975 case '>':
4976 // do not permit '<' or '>' in method names
4977 if (type == ClassFileParser::LegalMethod) {
4978 return false;
4979 }
4980 }
4981 }
4982 return true;
4983 }
4984
4985 // Take pointer to a UTF8 byte string (not NUL-terminated).
4986 // Skip over the longest part of the string that could
4987 // be taken as a fieldname. Allow '/' if slash_ok is true.
4988 // Return a pointer to just past the fieldname.
4989 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4990 // being true, we saw consecutive slashes (meaning we were looking for a
4991 // qualified path but found something that was badly-formed).
4992 static const char* skip_over_field_name(const char* const name,
4993 bool slash_ok,
4994 unsigned int length) {
4995 const char* p;
4996 jboolean last_is_slash = false;
4997 jboolean not_first_ch = false;
4998
4999 for (p = name; p != name + length; not_first_ch = true) {
5000 const char* old_p = p;
5001 jchar ch = *p;
5002 if (ch < 128) {
5003 p++;
5004 // quick check for ascii
5005 if ((ch >= 'a' && ch <= 'z') ||
5006 (ch >= 'A' && ch <= 'Z') ||
5007 (ch == '_' || ch == '$') ||
5008 (not_first_ch && ch >= '0' && ch <= '9')) {
5009 last_is_slash = false;
5010 continue;
5011 }
5012 if (slash_ok && ch == '/') {
5013 if (last_is_slash) {
5014 return NULL; // Don't permit consecutive slashes
5015 }
5016 last_is_slash = true;
5017 continue;
5018 }
5019 }
5020 else {
5021 jint unicode_ch;
5022 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5023 p = tmp_p;
5024 last_is_slash = false;
5025 // Check if ch is Java identifier start or is Java identifier part
5026 // 4672820: call java.lang.Character methods directly without generating separate tables.
5027 EXCEPTION_MARK;
5028 // return value
5029 JavaValue result(T_BOOLEAN);
5030 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5031 JavaCallArguments args;
5032 args.push_int(unicode_ch);
5033
5034 if (not_first_ch) {
5035 // public static boolean isJavaIdentifierPart(char ch);
5036 JavaCalls::call_static(&result,
5037 SystemDictionary::Character_klass(),
5038 vmSymbols::isJavaIdentifierPart_name(),
5039 vmSymbols::int_bool_signature(),
5040 &args,
5041 THREAD);
5042 } else {
5043 // public static boolean isJavaIdentifierStart(char ch);
5044 JavaCalls::call_static(&result,
5045 SystemDictionary::Character_klass(),
5046 vmSymbols::isJavaIdentifierStart_name(),
5047 vmSymbols::int_bool_signature(),
5048 &args,
5049 THREAD);
5050 }
5051 if (HAS_PENDING_EXCEPTION) {
5052 CLEAR_PENDING_EXCEPTION;
5053 return NULL;
5054 }
5055 if(result.get_jboolean()) {
5056 continue;
5057 }
5058 }
5059 return (not_first_ch) ? old_p : NULL;
5060 }
5061 return (not_first_ch) ? p : NULL;
5062 }
5063
5064 // Take pointer to a UTF8 byte string (not NUL-terminated).
5065 // Skip over the longest part of the string that could
5066 // be taken as a field signature. Allow "void" if void_ok.
5067 // Return a pointer to just past the signature.
5068 // Return NULL if no legal signature is found.
5069 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5070 bool void_ok,
5071 unsigned int length,
5072 TRAPS) const {
5073 unsigned int array_dim = 0;
5074 while (length > 0) {
5075 switch (signature[0]) {
5076 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5077 case JVM_SIGNATURE_BOOLEAN:
5078 case JVM_SIGNATURE_BYTE:
5079 case JVM_SIGNATURE_CHAR:
5080 case JVM_SIGNATURE_SHORT:
5081 case JVM_SIGNATURE_INT:
5082 case JVM_SIGNATURE_FLOAT:
5083 case JVM_SIGNATURE_LONG:
5084 case JVM_SIGNATURE_DOUBLE:
5085 return signature + 1;
5086 case JVM_SIGNATURE_CLASS: {
5087 if (_major_version < JAVA_1_5_VERSION) {
5088 // Skip over the class name if one is there
5089 const char* const p = skip_over_field_name(signature + 1, true, --length);
5090
5091 // The next character better be a semicolon
5092 if (p && (p - signature) > 1 && p[0] == ';') {
5093 return p + 1;
5094 }
5095 }
5096 else {
5097 // Skip leading 'L' and ignore first appearance of ';'
5098 signature++;
5099 const char* c = (const char*) memchr(signature, ';', length - 1);
5100 // Format check signature
5101 if (c != NULL) {
5102 int newlen = c - (char*) signature;
5103 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5104 if (!legal) {
5105 classfile_parse_error("Class name contains illegal character "
5106 "in descriptor in class file %s",
5107 CHECK_0);
5108 return NULL;
5109 }
5110 return signature + newlen + 1;
5111 }
5112 }
5113 return NULL;
5114 }
5115 case JVM_SIGNATURE_ARRAY:
5116 array_dim++;
5117 if (array_dim > 255) {
5118 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5119 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5120 }
5121 // The rest of what's there better be a legal signature
5122 signature++;
5123 length--;
5124 void_ok = false;
5125 break;
5126 default:
5127 return NULL;
5128 }
5129 }
5130 return NULL;
5131 }
5132
5133 // Checks if name is a legal class name.
5134 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5135 if (!_need_verify || _relax_verify) { return; }
5136
5137 assert(name->refcount() > 0, "symbol must be kept alive");
5138 char* bytes = (char*)name->bytes();
5139 unsigned int length = name->utf8_length();
5140 bool legal = false;
5141
5142 if (length > 0) {
5143 const char* p;
5144 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5145 p = skip_over_field_signature(bytes, false, length, CHECK);
5146 legal = (p != NULL) && ((p - bytes) == (int)length);
5147 } else if (_major_version < JAVA_1_5_VERSION) {
5148 if (bytes[0] != '<') {
5149 p = skip_over_field_name(bytes, true, length);
5150 legal = (p != NULL) && ((p - bytes) == (int)length);
5151 }
5152 } else {
5153 // 4900761: relax the constraints based on JSR202 spec
5154 // Class names may be drawn from the entire Unicode character set.
5155 // Identifiers between '/' must be unqualified names.
5156 // The utf8 string has been verified when parsing cpool entries.
5157 legal = verify_unqualified_name(bytes, length, LegalClass);
5158 }
5159 }
5160 if (!legal) {
5161 ResourceMark rm(THREAD);
5162 assert(_class_name != NULL, "invariant");
5163 Exceptions::fthrow(
5164 THREAD_AND_LOCATION,
5165 vmSymbols::java_lang_ClassFormatError(),
5166 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5167 _class_name->as_C_string()
5168 );
5169 return;
5170 }
5171 }
5172
5173 // Checks if name is a legal field name.
5174 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5175 if (!_need_verify || _relax_verify) { return; }
5176
5177 char* bytes = (char*)name->bytes();
5178 unsigned int length = name->utf8_length();
5179 bool legal = false;
5180
5181 if (length > 0) {
5182 if (_major_version < JAVA_1_5_VERSION) {
5183 if (bytes[0] != '<') {
5184 const char* p = skip_over_field_name(bytes, false, length);
5185 legal = (p != NULL) && ((p - bytes) == (int)length);
5186 }
5187 } else {
5188 // 4881221: relax the constraints based on JSR202 spec
5189 legal = verify_unqualified_name(bytes, length, LegalField);
5190 }
5191 }
5192
5193 if (!legal) {
5194 ResourceMark rm(THREAD);
5195 assert(_class_name != NULL, "invariant");
5196 Exceptions::fthrow(
5197 THREAD_AND_LOCATION,
5198 vmSymbols::java_lang_ClassFormatError(),
5199 "Illegal field name \"%.*s\" in class %s", length, bytes,
5200 _class_name->as_C_string()
5201 );
5202 return;
5203 }
5204 }
5205
5206 // Checks if name is a legal method name.
5207 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5208 if (!_need_verify || _relax_verify) { return; }
5209
5210 assert(name != NULL, "method name is null");
5211 char* bytes = (char*)name->bytes();
5212 unsigned int length = name->utf8_length();
5213 bool legal = false;
5214
5215 if (length > 0) {
5216 if (bytes[0] == '<') {
5217 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5218 legal = true;
5219 }
5220 } else if (_major_version < JAVA_1_5_VERSION) {
5221 const char* p;
5222 p = skip_over_field_name(bytes, false, length);
5223 legal = (p != NULL) && ((p - bytes) == (int)length);
5224 } else {
5225 // 4881221: relax the constraints based on JSR202 spec
5226 legal = verify_unqualified_name(bytes, length, LegalMethod);
5227 }
5228 }
5229
5230 if (!legal) {
5231 ResourceMark rm(THREAD);
5232 assert(_class_name != NULL, "invariant");
5233 Exceptions::fthrow(
5234 THREAD_AND_LOCATION,
5235 vmSymbols::java_lang_ClassFormatError(),
5236 "Illegal method name \"%.*s\" in class %s", length, bytes,
5237 _class_name->as_C_string()
5238 );
5239 return;
5240 }
5241 }
5242
5243
5244 // Checks if signature is a legal field signature.
5245 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5246 const Symbol* signature,
5247 TRAPS) const {
5248 if (!_need_verify) { return; }
5249
5250 const char* const bytes = (const char* const)signature->bytes();
5251 const unsigned int length = signature->utf8_length();
5252 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5253
5254 if (p == NULL || (p - bytes) != (int)length) {
5255 throwIllegalSignature("Field", name, signature, CHECK);
5256 }
5257 }
5258
5259 // Checks if signature is a legal method signature.
5260 // Returns number of parameters
5261 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5262 const Symbol* signature,
5263 TRAPS) const {
5264 if (!_need_verify) {
5265 // make sure caller's args_size will be less than 0 even for non-static
5266 // method so it will be recomputed in compute_size_of_parameters().
5267 return -2;
5268 }
5269
5270 // Class initializers cannot have args for class format version >= 51.
5271 if (name == vmSymbols::class_initializer_name() &&
5272 signature != vmSymbols::void_method_signature() &&
5273 _major_version >= JAVA_7_VERSION) {
5274 throwIllegalSignature("Method", name, signature, CHECK_0);
5275 return 0;
5276 }
5277
5278 unsigned int args_size = 0;
5279 const char* p = (const char*)signature->bytes();
5280 unsigned int length = signature->utf8_length();
5281 const char* nextp;
5282
5283 // The first character must be a '('
5284 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5285 length--;
5286 // Skip over legal field signatures
5287 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5288 while ((length > 0) && (nextp != NULL)) {
5289 args_size++;
5290 if (p[0] == 'J' || p[0] == 'D') {
5291 args_size++;
5292 }
5293 length -= nextp - p;
5294 p = nextp;
5295 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5296 }
5297 // The first non-signature thing better be a ')'
5298 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5299 length--;
5300 if (name->utf8_length() > 0 && name->char_at(0) == '<') {
5301 // All internal methods must return void
5302 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5303 return args_size;
5304 }
5305 } else {
5306 // Now we better just have a return value
5307 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5308 if (nextp && ((int)length == (nextp - p))) {
5309 return args_size;
5310 }
5311 }
5312 }
5313 }
5314 // Report error
5315 throwIllegalSignature("Method", name, signature, CHECK_0);
5316 return 0;
5317 }
5318
5319 int ClassFileParser::static_field_size() const {
5320 assert(_field_info != NULL, "invariant");
5321 return _field_info->static_field_size;
5322 }
5323
5324 int ClassFileParser::total_oop_map_count() const {
5325 assert(_field_info != NULL, "invariant");
5326 return _field_info->total_oop_map_count;
5327 }
5328
5329 jint ClassFileParser::layout_size() const {
5330 assert(_field_info != NULL, "invariant");
5331 return _field_info->instance_size;
5332 }
5333
5334 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5335 const Array<Method*>* methods) {
5336 assert(ik != NULL, "invariant");
5337 assert(methods != NULL, "invariant");
5338
5339 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5340 // (We used to do this lazily, but now we query it in Rewriter,
5341 // which is eagerly done for every method, so we might as well do it now,
5342 // when everything is fresh in memory.)
5343 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5344
5345 if (klass_id != vmSymbols::NO_SID) {
5346 for (int j = 0; j < methods->length(); ++j) {
5347 Method* method = methods->at(j);
5348 method->init_intrinsic_id();
5349
5350 if (CheckIntrinsics) {
5351 // Check if an intrinsic is defined for method 'method',
5352 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5353 if (method->intrinsic_id() != vmIntrinsics::_none &&
5354 !method->intrinsic_candidate()) {
5355 tty->print("Compiler intrinsic is defined for method [%s], "
5356 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5357 method->name_and_sig_as_C_string(),
5358 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5359 );
5360 tty->cr();
5361 DEBUG_ONLY(vm_exit(1));
5362 }
5363 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5364 // but there is no intrinsic available for it.
5365 if (method->intrinsic_candidate() &&
5366 method->intrinsic_id() == vmIntrinsics::_none) {
5367 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5368 "but no compiler intrinsic is defined for the method.%s",
5369 method->name_and_sig_as_C_string(),
5370 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5371 );
5372 tty->cr();
5373 DEBUG_ONLY(vm_exit(1));
5374 }
5375 }
5376 } // end for
5377
5378 #ifdef ASSERT
5379 if (CheckIntrinsics) {
5380 // Check for orphan methods in the current class. A method m
5381 // of a class C is orphan if an intrinsic is defined for method m,
5382 // but class C does not declare m.
5383 // The check is potentially expensive, therefore it is available
5384 // only in debug builds.
5385
5386 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5387 if (vmIntrinsics::_compiledLambdaForm == id) {
5388 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5389 // generated for the JVM from a LambdaForm and therefore no method
5390 // is defined for it.
5391 continue;
5392 }
5393
5394 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5395 // Check if the current class contains a method with the same
5396 // name, flags, signature.
5397 bool match = false;
5398 for (int j = 0; j < methods->length(); ++j) {
5399 const Method* method = methods->at(j);
5400 if (method->intrinsic_id() == id) {
5401 match = true;
5402 break;
5403 }
5404 }
5405
5406 if (!match) {
5407 char buf[1000];
5408 tty->print("Compiler intrinsic is defined for method [%s], "
5409 "but the method is not available in class [%s].%s",
5410 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5411 buf, sizeof(buf)),
5412 ik->name()->as_C_string(),
5413 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5414 );
5415 tty->cr();
5416 DEBUG_ONLY(vm_exit(1));
5417 }
5418 }
5419 } // end for
5420 } // CheckIntrinsics
5421 #endif // ASSERT
5422 }
5423 }
5424
5425 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5426 if (_klass != NULL) {
5427 return _klass;
5428 }
5429
5430 InstanceKlass* const ik =
5431 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5432
5433 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5434
5435 assert(_klass == ik, "invariant");
5436
5437
5438 if (ik->should_store_fingerprint()) {
5439 ik->store_fingerprint(_stream->compute_fingerprint());
5440 }
5441
5442 ik->set_has_passed_fingerprint_check(false);
5443 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5444 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5445 uint64_t fp = ik->has_stored_fingerprint() ? ik->get_stored_fingerprint() : _stream->compute_fingerprint();
5446 if (aot_fp != 0 && aot_fp == fp) {
5447 // This class matches with a class saved in an AOT library
5448 ik->set_has_passed_fingerprint_check(true);
5449 } else {
5450 ResourceMark rm;
5451 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5452 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5453 }
5454 }
5455
5456 return ik;
5457 }
5458
5459 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5460 assert(ik != NULL, "invariant");
5461
5462 // Set name and CLD before adding to CLD
5463 ik->set_class_loader_data(_loader_data);
5464 ik->set_name(_class_name);
5465
5466 // Add all classes to our internal class loader list here,
5467 // including classes in the bootstrap (NULL) class loader.
5468 const bool publicize = !is_internal();
5469
5470 _loader_data->add_class(ik, publicize);
5471
5472 set_klass_to_deallocate(ik);
5473
5474 assert(_field_info != NULL, "invariant");
5475 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5476 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5477 "sanity");
5478
5479 assert(ik->is_instance_klass(), "sanity");
5480 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5481
5482 // Fill in information already parsed
5483 ik->set_should_verify_class(_need_verify);
5484
5485 // Not yet: supers are done below to support the new subtype-checking fields
5486 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5487 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5488 assert(_fac != NULL, "invariant");
5489 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5490
5491 // this transfers ownership of a lot of arrays from
5492 // the parser onto the InstanceKlass*
5493 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5494
5495 // note that is not safe to use the fields in the parser from this point on
5496 assert(NULL == _cp, "invariant");
5497 assert(NULL == _fields, "invariant");
5498 assert(NULL == _methods, "invariant");
5499 assert(NULL == _inner_classes, "invariant");
5500 assert(NULL == _nest_members, "invariant");
5501 assert(NULL == _local_interfaces, "invariant");
5502 assert(NULL == _combined_annotations, "invariant");
5503
5504 if (_has_final_method) {
5505 ik->set_has_final_method();
5506 }
5507
5508 ik->copy_method_ordering(_method_ordering, CHECK);
5509 // The InstanceKlass::_methods_jmethod_ids cache
5510 // is managed on the assumption that the initial cache
5511 // size is equal to the number of methods in the class. If
5512 // that changes, then InstanceKlass::idnum_can_increment()
5513 // has to be changed accordingly.
5514 ik->set_initial_method_idnum(ik->methods()->length());
5515
5516 ik->set_this_class_index(_this_class_index);
5517
5518 if (is_unsafe_anonymous()) {
5519 // _this_class_index is a CONSTANT_Class entry that refers to this
5520 // anonymous class itself. If this class needs to refer to its own methods or
5521 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5522 // _this_class_index. However, because this class is anonymous (it's
5523 // not stored in SystemDictionary), _this_class_index cannot be resolved
5524 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5525 // Therefore, we must eagerly resolve _this_class_index now.
5526 ik->constants()->klass_at_put(_this_class_index, ik);
5527 }
5528
5529 ik->set_minor_version(_minor_version);
5530 ik->set_major_version(_major_version);
5531 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5532 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5533
5534 if (_unsafe_anonymous_host != NULL) {
5535 assert (ik->is_unsafe_anonymous(), "should be the same");
5536 ik->set_unsafe_anonymous_host(_unsafe_anonymous_host);
5537 }
5538
5539 // Set PackageEntry for this_klass
5540 oop cl = ik->class_loader();
5541 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5542 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5543 ik->set_package(cld, CHECK);
5544
5545 const Array<Method*>* const methods = ik->methods();
5546 assert(methods != NULL, "invariant");
5547 const int methods_len = methods->length();
5548
5549 check_methods_for_intrinsics(ik, methods);
5550
5551 // Fill in field values obtained by parse_classfile_attributes
5552 if (_parsed_annotations->has_any_annotations()) {
5553 _parsed_annotations->apply_to(ik);
5554 }
5555
5556 apply_parsed_class_attributes(ik);
5557
5558 // Miranda methods
5559 if ((_num_miranda_methods > 0) ||
5560 // if this class introduced new miranda methods or
5561 (_super_klass != NULL && _super_klass->has_miranda_methods())
5562 // super class exists and this class inherited miranda methods
5563 ) {
5564 ik->set_has_miranda_methods(); // then set a flag
5565 }
5566
5567 // Fill in information needed to compute superclasses.
5568 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5569 ik->set_transitive_interfaces(_transitive_interfaces);
5570 _transitive_interfaces = NULL;
5571
5572 // Initialize itable offset tables
5573 klassItable::setup_itable_offset_table(ik);
5574
5575 // Compute transitive closure of interfaces this class implements
5576 // Do final class setup
5577 fill_oop_maps(ik,
5578 _field_info->nonstatic_oop_map_count,
5579 _field_info->nonstatic_oop_offsets,
5580 _field_info->nonstatic_oop_counts);
5581
5582 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5583 set_precomputed_flags(ik);
5584
5585 // check if this class can access its super class
5586 check_super_class_access(ik, CHECK);
5587
5588 // check if this class can access its superinterfaces
5589 check_super_interface_access(ik, CHECK);
5590
5591 // check if this class overrides any final method
5592 check_final_method_override(ik, CHECK);
5593
5594 // reject static interface methods prior to Java 8
5595 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5596 check_illegal_static_method(ik, CHECK);
5597 }
5598
5599 // Obtain this_klass' module entry
5600 ModuleEntry* module_entry = ik->module();
5601 assert(module_entry != NULL, "module_entry should always be set");
5602
5603 // Obtain java.lang.Module
5604 Handle module_handle(THREAD, module_entry->module());
5605
5606 // Allocate mirror and initialize static fields
5607 // The create_mirror() call will also call compute_modifiers()
5608 java_lang_Class::create_mirror(ik,
5609 Handle(THREAD, _loader_data->class_loader()),
5610 module_handle,
5611 _protection_domain,
5612 CHECK);
5613
5614 assert(_all_mirandas != NULL, "invariant");
5615
5616 // Generate any default methods - default methods are public interface methods
5617 // that have a default implementation. This is new with Java 8.
5618 if (_has_nonstatic_concrete_methods) {
5619 DefaultMethods::generate_default_methods(ik,
5620 _all_mirandas,
5621 CHECK);
5622 }
5623
5624 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5625 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5626 !module_entry->has_default_read_edges()) {
5627 if (!module_entry->set_has_default_read_edges()) {
5628 // We won a potential race
5629 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5630 }
5631 }
5632
5633 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5634
5635 if (!is_internal()) {
5636 if (log_is_enabled(Info, class, load)) {
5637 ResourceMark rm;
5638 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5639 ik->print_class_load_logging(_loader_data, module_name, _stream);
5640 }
5641
5642 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5643 ik->major_version() != JAVA_MIN_SUPPORTED_VERSION &&
5644 log_is_enabled(Info, class, preview)) {
5645 ResourceMark rm;
5646 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5647 ik->external_name(), ik->major_version());
5648 }
5649
5650 if (log_is_enabled(Debug, class, resolve)) {
5651 ResourceMark rm;
5652 // print out the superclass.
5653 const char * from = ik->external_name();
5654 if (ik->java_super() != NULL) {
5655 log_debug(class, resolve)("%s %s (super)",
5656 from,
5657 ik->java_super()->external_name());
5658 }
5659 // print out each of the interface classes referred to by this class.
5660 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5661 if (local_interfaces != NULL) {
5662 const int length = local_interfaces->length();
5663 for (int i = 0; i < length; i++) {
5664 const InstanceKlass* const k = local_interfaces->at(i);
5665 const char * to = k->external_name();
5666 log_debug(class, resolve)("%s %s (interface)", from, to);
5667 }
5668 }
5669 }
5670 }
5671
5672 ik->set_method_sig_count(_method_sig_count);
5673
5674 JFR_ONLY(INIT_ID(ik);)
5675
5676 // If we reach here, all is well.
5677 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5678 // in order for it to not be destroyed in the ClassFileParser destructor.
5679 set_klass_to_deallocate(NULL);
5680
5681 // it's official
5682 set_klass(ik);
5683
5684 debug_only(ik->verify();)
5685 }
5686
5687 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5688 // Decrement the refcount in the old name, since we're clobbering it.
5689 _class_name->decrement_refcount();
5690
5691 _class_name = new_class_name;
5692 // Increment the refcount of the new name.
5693 // Now the ClassFileParser owns this name and will decrement in
5694 // the destructor.
5695 _class_name->increment_refcount();
5696 }
5697
5698
5699 // For an unsafe anonymous class that is in the unnamed package, move it to its host class's
5700 // package by prepending its host class's package name to its class name and setting
5701 // its _class_name field.
5702 void ClassFileParser::prepend_host_package_name(const InstanceKlass* unsafe_anonymous_host, TRAPS) {
5703 ResourceMark rm(THREAD);
5704 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5705 "Unsafe anonymous class should not be in a package");
5706 const char* host_pkg_name =
5707 ClassLoader::package_from_name(unsafe_anonymous_host->name()->as_C_string(), NULL);
5708
5709 if (host_pkg_name != NULL) {
5710 int host_pkg_len = (int)strlen(host_pkg_name);
5711 int class_name_len = _class_name->utf8_length();
5712 int symbol_len = host_pkg_len + 1 + class_name_len;
5713 char* new_anon_name = NEW_RESOURCE_ARRAY(char, symbol_len + 1);
5714 int n = os::snprintf(new_anon_name, symbol_len + 1, "%s/%.*s",
5715 host_pkg_name, class_name_len, _class_name->base());
5716 assert(n == symbol_len, "Unexpected number of characters in string");
5717
5718 // Decrement old _class_name to avoid leaking.
5719 _class_name->decrement_refcount();
5720
5721 // Create a symbol and update the anonymous class name.
5722 // The new class name is created with a refcount of one. When installed into the InstanceKlass,
5723 // it'll be two and when the ClassFileParser destructor runs, it'll go back to one and get deleted
5724 // when the class is unloaded.
5725 _class_name = SymbolTable::new_symbol(new_anon_name, symbol_len, CHECK);
5726 }
5727 }
5728
5729 // If the host class and the anonymous class are in the same package then do
5730 // nothing. If the anonymous class is in the unnamed package then move it to its
5731 // host's package. If the classes are in different packages then throw an IAE
5732 // exception.
5733 void ClassFileParser::fix_unsafe_anonymous_class_name(TRAPS) {
5734 assert(_unsafe_anonymous_host != NULL, "Expected an unsafe anonymous class");
5735
5736 const jbyte* anon_last_slash = UTF8::strrchr((const jbyte*)_class_name->base(),
5737 _class_name->utf8_length(), '/');
5738 if (anon_last_slash == NULL) { // Unnamed package
5739 prepend_host_package_name(_unsafe_anonymous_host, CHECK);
5740 } else {
5741 if (!_unsafe_anonymous_host->is_same_class_package(_unsafe_anonymous_host->class_loader(), _class_name)) {
5742 ResourceMark rm(THREAD);
5743 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5744 err_msg("Host class %s and anonymous class %s are in different packages",
5745 _unsafe_anonymous_host->name()->as_C_string(), _class_name->as_C_string()));
5746 }
5747 }
5748 }
5749
5750 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5751 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5752 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5753 bool need_verify =
5754 // verifyAll
5755 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5756 // verifyRemote
5757 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5758 return !need_verify;
5759 }
5760
5761 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5762 Symbol* name,
5763 ClassLoaderData* loader_data,
5764 Handle protection_domain,
5765 const InstanceKlass* unsafe_anonymous_host,
5766 GrowableArray<Handle>* cp_patches,
5767 Publicity pub_level,
5768 TRAPS) :
5769 _stream(stream),
5770 _requested_name(name),
5771 _class_name(NULL),
5772 _loader_data(loader_data),
5773 _unsafe_anonymous_host(unsafe_anonymous_host),
5774 _cp_patches(cp_patches),
5775 _num_patched_klasses(0),
5776 _max_num_patched_klasses(0),
5777 _orig_cp_size(0),
5778 _first_patched_klass_resolved_index(0),
5779 _super_klass(),
5780 _cp(NULL),
5781 _fields(NULL),
5782 _methods(NULL),
5783 _inner_classes(NULL),
5784 _nest_members(NULL),
5785 _nest_host(0),
5786 _local_interfaces(NULL),
5787 _transitive_interfaces(NULL),
5788 _combined_annotations(NULL),
5789 _annotations(NULL),
5790 _type_annotations(NULL),
5791 _fields_annotations(NULL),
5792 _fields_type_annotations(NULL),
5793 _klass(NULL),
5794 _klass_to_deallocate(NULL),
5795 _parsed_annotations(NULL),
5796 _fac(NULL),
5797 _field_info(NULL),
5798 _method_ordering(NULL),
5799 _all_mirandas(NULL),
5800 _vtable_size(0),
5801 _itable_size(0),
5802 _num_miranda_methods(0),
5803 _method_sig_count(0),
5804 _rt(REF_NONE),
5805 _protection_domain(protection_domain),
5806 _access_flags(),
5807 _pub_level(pub_level),
5808 _bad_constant_seen(0),
5809 _synthetic_flag(false),
5810 _sde_length(false),
5811 _sde_buffer(NULL),
5812 _sourcefile_index(0),
5813 _generic_signature_index(0),
5814 _major_version(0),
5815 _minor_version(0),
5816 _this_class_index(0),
5817 _super_class_index(0),
5818 _itfs_len(0),
5819 _java_fields_count(0),
5820 _need_verify(false),
5821 _relax_verify(false),
5822 _has_nonstatic_concrete_methods(false),
5823 _declares_nonstatic_concrete_methods(false),
5824 _has_final_method(false),
5825 _has_finalizer(false),
5826 _has_empty_finalizer(false),
5827 _has_vanilla_constructor(false),
5828 _max_bootstrap_specifier_index(-1) {
5829
5830 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5831 _class_name->increment_refcount();
5832
5833 assert(THREAD->is_Java_thread(), "invariant");
5834 assert(_loader_data != NULL, "invariant");
5835 assert(stream != NULL, "invariant");
5836 assert(_stream != NULL, "invariant");
5837 assert(_stream->buffer() == _stream->current(), "invariant");
5838 assert(_class_name != NULL, "invariant");
5839 assert(0 == _access_flags.as_int(), "invariant");
5840
5841 // Figure out whether we can skip format checking (matching classic VM behavior)
5842 if (DumpSharedSpaces) {
5843 // verify == true means it's a 'remote' class (i.e., non-boot class)
5844 // Verification decision is based on BytecodeVerificationRemote flag
5845 // for those classes.
5846 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5847 BytecodeVerificationLocal;
5848 }
5849 else {
5850 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5851 stream->need_verify());
5852 }
5853 if (_cp_patches != NULL) {
5854 int len = _cp_patches->length();
5855 for (int i=0; i<len; i++) {
5856 if (has_cp_patch_at(i)) {
5857 Handle patch = cp_patch_at(i);
5858 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5859 // We need to append the names of the patched classes to the end of the constant pool,
5860 // because a patched class may have a Utf8 name that's not already included in the
5861 // original constant pool. These class names are used when patch_constant_pool()
5862 // calls patch_class().
5863 //
5864 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5865 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5866 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5867 _max_num_patched_klasses++;
5868 }
5869 }
5870 }
5871 }
5872
5873 // synch back verification state to stream
5874 stream->set_verify(_need_verify);
5875
5876 // Check if verification needs to be relaxed for this class file
5877 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5878 _relax_verify = relax_format_check_for(_loader_data);
5879
5880 parse_stream(stream, CHECK);
5881
5882 post_process_parsed_stream(stream, _cp, CHECK);
5883 }
5884
5885 void ClassFileParser::clear_class_metadata() {
5886 // metadata created before the instance klass is created. Must be
5887 // deallocated if classfile parsing returns an error.
5888 _cp = NULL;
5889 _fields = NULL;
5890 _methods = NULL;
5891 _inner_classes = NULL;
5892 _nest_members = NULL;
5893 _local_interfaces = NULL;
5894 _combined_annotations = NULL;
5895 _annotations = _type_annotations = NULL;
5896 _fields_annotations = _fields_type_annotations = NULL;
5897 }
5898
5899 // Destructor to clean up
5900 ClassFileParser::~ClassFileParser() {
5901 _class_name->decrement_refcount();
5902
5903 if (_cp != NULL) {
5904 MetadataFactory::free_metadata(_loader_data, _cp);
5905 }
5906 if (_fields != NULL) {
5907 MetadataFactory::free_array<u2>(_loader_data, _fields);
5908 }
5909
5910 if (_methods != NULL) {
5911 // Free methods
5912 InstanceKlass::deallocate_methods(_loader_data, _methods);
5913 }
5914
5915 // beware of the Universe::empty_blah_array!!
5916 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5917 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5918 }
5919
5920 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
5921 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5922 }
5923
5924 // Free interfaces
5925 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5926 _local_interfaces, _transitive_interfaces);
5927
5928 if (_combined_annotations != NULL) {
5929 // After all annotations arrays have been created, they are installed into the
5930 // Annotations object that will be assigned to the InstanceKlass being created.
5931
5932 // Deallocate the Annotations object and the installed annotations arrays.
5933 _combined_annotations->deallocate_contents(_loader_data);
5934
5935 // If the _combined_annotations pointer is non-NULL,
5936 // then the other annotations fields should have been cleared.
5937 assert(_annotations == NULL, "Should have been cleared");
5938 assert(_type_annotations == NULL, "Should have been cleared");
5939 assert(_fields_annotations == NULL, "Should have been cleared");
5940 assert(_fields_type_annotations == NULL, "Should have been cleared");
5941 } else {
5942 // If the annotations arrays were not installed into the Annotations object,
5943 // then they have to be deallocated explicitly.
5944 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5945 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5946 Annotations::free_contents(_loader_data, _fields_annotations);
5947 Annotations::free_contents(_loader_data, _fields_type_annotations);
5948 }
5949
5950 clear_class_metadata();
5951 _transitive_interfaces = NULL;
5952
5953 // deallocate the klass if already created. Don't directly deallocate, but add
5954 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5955 // at a safepoint.
5956 if (_klass_to_deallocate != NULL) {
5957 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5958 }
5959 }
5960
5961 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5962 TRAPS) {
5963
5964 assert(stream != NULL, "invariant");
5965 assert(_class_name != NULL, "invariant");
5966
5967 // BEGIN STREAM PARSING
5968 stream->guarantee_more(8, CHECK); // magic, major, minor
5969 // Magic value
5970 const u4 magic = stream->get_u4_fast();
5971 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5972 "Incompatible magic value %u in class file %s",
5973 magic, CHECK);
5974
5975 // Version numbers
5976 _minor_version = stream->get_u2_fast();
5977 _major_version = stream->get_u2_fast();
5978
5979 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5980 ResourceMark rm;
5981 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5982 _major_version, _minor_version, _class_name->as_C_string());
5983 Exceptions::fthrow(
5984 THREAD_AND_LOCATION,
5985 vmSymbols::java_lang_UnsupportedClassVersionError(),
5986 "Unsupported major.minor version for dump time %u.%u",
5987 _major_version,
5988 _minor_version);
5989 }
5990
5991 // Check version numbers - we check this even with verifier off
5992 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
5993
5994 stream->guarantee_more(3, CHECK); // length, first cp tag
5995 u2 cp_size = stream->get_u2_fast();
5996
5997 guarantee_property(
5998 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5999 cp_size, CHECK);
6000
6001 _orig_cp_size = cp_size;
6002 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6003 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6004 }
6005 cp_size += _max_num_patched_klasses;
6006
6007 _cp = ConstantPool::allocate(_loader_data,
6008 cp_size,
6009 CHECK);
6010
6011 ConstantPool* const cp = _cp;
6012
6013 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6014
6015 assert(cp_size == (const u2)cp->length(), "invariant");
6016
6017 // ACCESS FLAGS
6018 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6019
6020 // Access flags
6021 jint flags;
6022 // JVM_ACC_MODULE is defined in JDK-9 and later.
6023 if (_major_version >= JAVA_9_VERSION) {
6024 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
6025 } else {
6026 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
6027 }
6028
6029 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6030 // Set abstract bit for old class files for backward compatibility
6031 flags |= JVM_ACC_ABSTRACT;
6032 }
6033
6034 verify_legal_class_modifiers(flags, CHECK);
6035
6036 short bad_constant = class_bad_constant_seen();
6037 if (bad_constant != 0) {
6038 // Do not throw CFE until after the access_flags are checked because if
6039 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6040 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6041 }
6042
6043 _access_flags.set_flags(flags);
6044
6045 // This class and superclass
6046 _this_class_index = stream->get_u2_fast();
6047 check_property(
6048 valid_cp_range(_this_class_index, cp_size) &&
6049 cp->tag_at(_this_class_index).is_unresolved_klass(),
6050 "Invalid this class index %u in constant pool in class file %s",
6051 _this_class_index, CHECK);
6052
6053 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6054 assert(class_name_in_cp != NULL, "class_name can't be null");
6055
6056 // Update _class_name to reflect the name in the constant pool
6057 update_class_name(class_name_in_cp);
6058
6059 // Don't need to check whether this class name is legal or not.
6060 // It has been checked when constant pool is parsed.
6061 // However, make sure it is not an array type.
6062 if (_need_verify) {
6063 guarantee_property(_class_name->char_at(0) != JVM_SIGNATURE_ARRAY,
6064 "Bad class name in class file %s",
6065 CHECK);
6066 }
6067
6068 // Checks if name in class file matches requested name
6069 if (_requested_name != NULL && _requested_name != _class_name) {
6070 ResourceMark rm(THREAD);
6071 Exceptions::fthrow(
6072 THREAD_AND_LOCATION,
6073 vmSymbols::java_lang_NoClassDefFoundError(),
6074 "%s (wrong name: %s)",
6075 _class_name->as_C_string(),
6076 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6077 );
6078 return;
6079 }
6080
6081 // if this is an anonymous class fix up its name if it's in the unnamed
6082 // package. Otherwise, throw IAE if it is in a different package than
6083 // its host class.
6084 if (_unsafe_anonymous_host != NULL) {
6085 fix_unsafe_anonymous_class_name(CHECK);
6086 }
6087
6088 // Verification prevents us from creating names with dots in them, this
6089 // asserts that that's the case.
6090 assert(is_internal_format(_class_name), "external class name format used internally");
6091
6092 if (!is_internal()) {
6093 LogTarget(Debug, class, preorder) lt;
6094 if (lt.is_enabled()){
6095 ResourceMark rm(THREAD);
6096 LogStream ls(lt);
6097 ls.print("%s", _class_name->as_klass_external_name());
6098 if (stream->source() != NULL) {
6099 ls.print(" source: %s", stream->source());
6100 }
6101 ls.cr();
6102 }
6103
6104 #if INCLUDE_CDS
6105 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6106 if (!ClassLoader::has_jrt_entry()) {
6107 warning("DumpLoadedClassList and CDS are not supported in exploded build");
6108 DumpLoadedClassList = NULL;
6109 } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6110 _unsafe_anonymous_host == NULL) {
6111 // Only dump the classes that can be stored into CDS archive.
6112 // Unsafe anonymous classes such as generated LambdaForm classes are also not included.
6113 oop class_loader = _loader_data->class_loader();
6114 ResourceMark rm(THREAD);
6115 bool skip = false;
6116 if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6117 // For the boot and platform class loaders, skip classes that are not found in the
6118 // java runtime image, such as those found in the --patch-module entries.
6119 // These classes can't be loaded from the archive during runtime.
6120 if (!ClassLoader::is_modules_image(stream->source()) && strncmp(stream->source(), "jrt:", 4) != 0) {
6121 skip = true;
6122 }
6123
6124 if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6125 // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6126 // as they can be loaded from the archive during runtime.
6127 skip = false;
6128 }
6129 }
6130 if (skip) {
6131 tty->print_cr("skip writing class %s from source %s to classlist file",
6132 _class_name->as_C_string(), stream->source());
6133 } else {
6134 classlist_file->print_cr("%s", _class_name->as_C_string());
6135 classlist_file->flush();
6136 }
6137 }
6138 }
6139 #endif
6140 }
6141
6142 // SUPERKLASS
6143 _super_class_index = stream->get_u2_fast();
6144 _super_klass = parse_super_class(cp,
6145 _super_class_index,
6146 _need_verify,
6147 CHECK);
6148
6149 // Interfaces
6150 _itfs_len = stream->get_u2_fast();
6151 parse_interfaces(stream,
6152 _itfs_len,
6153 cp,
6154 &_has_nonstatic_concrete_methods,
6155 CHECK);
6156
6157 assert(_local_interfaces != NULL, "invariant");
6158
6159 // Fields (offsets are filled in later)
6160 _fac = new FieldAllocationCount();
6161 parse_fields(stream,
6162 _access_flags.is_interface(),
6163 _fac,
6164 cp,
6165 cp_size,
6166 &_java_fields_count,
6167 CHECK);
6168
6169 assert(_fields != NULL, "invariant");
6170
6171 // Methods
6172 AccessFlags promoted_flags;
6173 parse_methods(stream,
6174 _access_flags.is_interface(),
6175 &promoted_flags,
6176 &_has_final_method,
6177 &_declares_nonstatic_concrete_methods,
6178 CHECK);
6179
6180 assert(_methods != NULL, "invariant");
6181
6182 // promote flags from parse_methods() to the klass' flags
6183 _access_flags.add_promoted_flags(promoted_flags.as_int());
6184
6185 if (_declares_nonstatic_concrete_methods) {
6186 _has_nonstatic_concrete_methods = true;
6187 }
6188
6189 // Additional attributes/annotations
6190 _parsed_annotations = new ClassAnnotationCollector();
6191 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6192
6193 assert(_inner_classes != NULL, "invariant");
6194
6195 // Finalize the Annotations metadata object,
6196 // now that all annotation arrays have been created.
6197 create_combined_annotations(CHECK);
6198
6199 // Make sure this is the end of class file stream
6200 guarantee_property(stream->at_eos(),
6201 "Extra bytes at the end of class file %s",
6202 CHECK);
6203
6204 // all bytes in stream read and parsed
6205 }
6206
6207 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6208 ConstantPool* cp,
6209 TRAPS) {
6210 assert(stream != NULL, "invariant");
6211 assert(stream->at_eos(), "invariant");
6212 assert(cp != NULL, "invariant");
6213 assert(_loader_data != NULL, "invariant");
6214
6215 if (_class_name == vmSymbols::java_lang_Object()) {
6216 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6217 "java.lang.Object cannot implement an interface in class file %s",
6218 CHECK);
6219 }
6220 // We check super class after class file is parsed and format is checked
6221 if (_super_class_index > 0 && NULL ==_super_klass) {
6222 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6223 if (_access_flags.is_interface()) {
6224 // Before attempting to resolve the superclass, check for class format
6225 // errors not checked yet.
6226 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6227 "Interfaces must have java.lang.Object as superclass in class file %s",
6228 CHECK);
6229 }
6230 Handle loader(THREAD, _loader_data->class_loader());
6231 _super_klass = (const InstanceKlass*)
6232 SystemDictionary::resolve_super_or_fail(_class_name,
6233 super_class_name,
6234 loader,
6235 _protection_domain,
6236 true,
6237 CHECK);
6238 }
6239
6240 if (_super_klass != NULL) {
6241 if (_super_klass->has_nonstatic_concrete_methods()) {
6242 _has_nonstatic_concrete_methods = true;
6243 }
6244
6245 if (_super_klass->is_interface()) {
6246 ResourceMark rm(THREAD);
6247 Exceptions::fthrow(
6248 THREAD_AND_LOCATION,
6249 vmSymbols::java_lang_IncompatibleClassChangeError(),
6250 "class %s has interface %s as super class",
6251 _class_name->as_klass_external_name(),
6252 _super_klass->external_name()
6253 );
6254 return;
6255 }
6256 // Make sure super class is not final
6257 if (_super_klass->is_final()) {
6258 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6259 }
6260 }
6261
6262 // Compute the transitive list of all unique interfaces implemented by this class
6263 _transitive_interfaces =
6264 compute_transitive_interfaces(_super_klass,
6265 _local_interfaces,
6266 _loader_data,
6267 CHECK);
6268
6269 assert(_transitive_interfaces != NULL, "invariant");
6270
6271 // sort methods
6272 _method_ordering = sort_methods(_methods);
6273
6274 _all_mirandas = new GrowableArray<Method*>(20);
6275
6276 Handle loader(THREAD, _loader_data->class_loader());
6277 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6278 &_num_miranda_methods,
6279 _all_mirandas,
6280 _super_klass,
6281 _methods,
6282 _access_flags,
6283 _major_version,
6284 loader,
6285 _class_name,
6286 _local_interfaces,
6287 CHECK);
6288
6289 // Size of Java itable (in words)
6290 _itable_size = _access_flags.is_interface() ? 0 :
6291 klassItable::compute_itable_size(_transitive_interfaces);
6292
6293 assert(_fac != NULL, "invariant");
6294 assert(_parsed_annotations != NULL, "invariant");
6295
6296 _field_info = new FieldLayoutInfo();
6297 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6298
6299 // Compute reference typ
6300 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6301
6302 }
6303
6304 void ClassFileParser::set_klass(InstanceKlass* klass) {
6305
6306 #ifdef ASSERT
6307 if (klass != NULL) {
6308 assert(NULL == _klass, "leaking?");
6309 }
6310 #endif
6311
6312 _klass = klass;
6313 }
6314
6315 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6316
6317 #ifdef ASSERT
6318 if (klass != NULL) {
6319 assert(NULL == _klass_to_deallocate, "leaking?");
6320 }
6321 #endif
6322
6323 _klass_to_deallocate = klass;
6324 }
6325
6326 // Caller responsible for ResourceMark
6327 // clone stream with rewound position
6328 const ClassFileStream* ClassFileParser::clone_stream() const {
6329 assert(_stream != NULL, "invariant");
6330
6331 return _stream->clone();
6332 }
6333 // ----------------------------------------------------------------------------
6334 // debugging
6335
6336 #ifdef ASSERT
6337
6338 // return true if class_name contains no '.' (internal format is '/')
6339 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6340 if (class_name != NULL) {
6341 ResourceMark rm;
6342 char* name = class_name->as_C_string();
6343 return strchr(name, '.') == NULL;
6344 } else {
6345 return true;
6346 }
6347 }
6348
6349 #endif