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/packageEntry.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/verificationType.hpp"
39 #include "classfile/verifier.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "logging/log.hpp"
42 #include "logging/logStream.hpp"
43 #include "memory/allocation.hpp"
44 #include "memory/metadataFactory.hpp"
45 #include "memory/oopFactory.hpp"
46 #include "memory/resourceArea.hpp"
47 #include "memory/universe.hpp"
48 #include "oops/annotations.hpp"
49 #include "oops/constantPool.inline.hpp"
50 #include "oops/fieldStreams.inline.hpp"
51 #include "oops/instanceKlass.hpp"
52 #include "oops/instanceMirrorKlass.hpp"
53 #include "oops/klass.inline.hpp"
54 #include "oops/klassVtable.hpp"
55 #include "oops/metadata.hpp"
56 #include "oops/method.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/symbol.hpp"
59 #include "prims/jvmtiExport.hpp"
60 #include "prims/jvmtiThreadState.hpp"
61 #include "runtime/arguments.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/javaCalls.hpp"
64 #include "runtime/os.hpp"
65 #include "runtime/perfData.hpp"
66 #include "runtime/reflection.hpp"
67 #include "runtime/safepointVerifiers.hpp"
68 #include "runtime/signature.hpp"
69 #include "runtime/timer.hpp"
70 #include "services/classLoadingService.hpp"
71 #include "services/threadService.hpp"
72 #include "utilities/align.hpp"
73 #include "utilities/bitMap.inline.hpp"
74 #include "utilities/copy.hpp"
75 #include "utilities/exceptions.hpp"
76 #include "utilities/globalDefinitions.hpp"
77 #include "utilities/growableArray.hpp"
78 #include "utilities/macros.hpp"
79 #include "utilities/ostream.hpp"
80 #include "utilities/resourceHash.hpp"
81 #include "utilities/utf8.hpp"
82
83 #if INCLUDE_CDS
84 #include "classfile/systemDictionaryShared.hpp"
85 #endif
86 #if INCLUDE_JFR
87 #include "jfr/support/jfrTraceIdExtension.hpp"
88 #endif
89
90 // We generally try to create the oops directly when parsing, rather than
91 // allocating temporary data structures and copying the bytes twice. A
92 // temporary area is only needed when parsing utf8 entries in the constant
93 // pool and when parsing line number tables.
94
95 // We add assert in debug mode when class format is not checked.
96
97 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
98 #define JAVA_MIN_SUPPORTED_VERSION 45
99 #define JAVA_PREVIEW_MINOR_VERSION 65535
100
101 // Used for two backward compatibility reasons:
102 // - to check for new additions to the class file format in JDK1.5
103 // - to check for bug fixes in the format checker in JDK1.5
104 #define JAVA_1_5_VERSION 49
105
106 // Used for backward compatibility reasons:
107 // - to check for javac bug fixes that happened after 1.5
108 // - also used as the max version when running in jdk6
109 #define JAVA_6_VERSION 50
110
111 // Used for backward compatibility reasons:
112 // - to disallow argument and require ACC_STATIC for <clinit> methods
113 #define JAVA_7_VERSION 51
114
115 // Extension method support.
116 #define JAVA_8_VERSION 52
117
118 #define JAVA_9_VERSION 53
119
120 #define JAVA_10_VERSION 54
121
122 #define JAVA_11_VERSION 55
123
124 #define JAVA_12_VERSION 56
125
126 #define JAVA_13_VERSION 57
127
128 #define JAVA_14_VERSION 58
129
130 #define JAVA_15_VERSION 59
131
132 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
133 assert((bad_constant == JVM_CONSTANT_Module ||
134 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
135 "Unexpected bad constant pool entry");
136 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
137 }
138
139 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
140 ConstantPool* cp,
141 const int length,
142 TRAPS) {
143 assert(stream != NULL, "invariant");
144 assert(cp != NULL, "invariant");
145
146 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
147 // this function (_current can be allocated in a register, with scalar
148 // replacement of aggregates). The _current pointer is copied back to
149 // stream() when this function returns. DON'T call another method within
150 // this method that uses stream().
151 const ClassFileStream cfs1 = *stream;
152 const ClassFileStream* const cfs = &cfs1;
153
154 assert(cfs->allocated_on_stack(), "should be local");
155 debug_only(const u1* const old_current = stream->current();)
156
157 // Used for batching symbol allocations.
158 const char* names[SymbolTable::symbol_alloc_batch_size];
159 int lengths[SymbolTable::symbol_alloc_batch_size];
160 int indices[SymbolTable::symbol_alloc_batch_size];
161 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
162 int names_count = 0;
163
164 // parsing Index 0 is unused
165 for (int index = 1; index < length; index++) {
166 // Each of the following case guarantees one more byte in the stream
167 // for the following tag or the access_flags following constant pool,
168 // so we don't need bounds-check for reading tag.
169 const u1 tag = cfs->get_u1_fast();
170 switch (tag) {
171 case JVM_CONSTANT_Class : {
172 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
173 const u2 name_index = cfs->get_u2_fast();
174 cp->klass_index_at_put(index, name_index);
175 break;
176 }
177 case JVM_CONSTANT_Fieldref: {
178 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
179 const u2 class_index = cfs->get_u2_fast();
180 const u2 name_and_type_index = cfs->get_u2_fast();
181 cp->field_at_put(index, class_index, name_and_type_index);
182 break;
183 }
184 case JVM_CONSTANT_Methodref: {
185 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
186 const u2 class_index = cfs->get_u2_fast();
187 const u2 name_and_type_index = cfs->get_u2_fast();
188 cp->method_at_put(index, class_index, name_and_type_index);
189 break;
190 }
191 case JVM_CONSTANT_InterfaceMethodref: {
192 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
193 const u2 class_index = cfs->get_u2_fast();
194 const u2 name_and_type_index = cfs->get_u2_fast();
195 cp->interface_method_at_put(index, class_index, name_and_type_index);
196 break;
197 }
198 case JVM_CONSTANT_String : {
199 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
200 const u2 string_index = cfs->get_u2_fast();
201 cp->string_index_at_put(index, string_index);
202 break;
203 }
204 case JVM_CONSTANT_MethodHandle :
205 case JVM_CONSTANT_MethodType: {
206 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
207 classfile_parse_error(
208 "Class file version does not support constant tag %u in class file %s",
209 tag, CHECK);
210 }
211 if (tag == JVM_CONSTANT_MethodHandle) {
212 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
213 const u1 ref_kind = cfs->get_u1_fast();
214 const u2 method_index = cfs->get_u2_fast();
215 cp->method_handle_index_at_put(index, ref_kind, method_index);
216 }
217 else if (tag == JVM_CONSTANT_MethodType) {
218 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
219 const u2 signature_index = cfs->get_u2_fast();
220 cp->method_type_index_at_put(index, signature_index);
221 }
222 else {
223 ShouldNotReachHere();
224 }
225 break;
226 }
227 case JVM_CONSTANT_Dynamic : {
228 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
229 classfile_parse_error(
230 "Class file version does not support constant tag %u in class file %s",
231 tag, CHECK);
232 }
233 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
234 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
235 const u2 name_and_type_index = cfs->get_u2_fast();
236 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
237 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
238 }
239 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
240 break;
241 }
242 case JVM_CONSTANT_InvokeDynamic : {
243 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
244 classfile_parse_error(
245 "Class file version does not support constant tag %u in class file %s",
246 tag, CHECK);
247 }
248 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
249 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
250 const u2 name_and_type_index = cfs->get_u2_fast();
251 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
252 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
253 }
254 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
255 break;
256 }
257 case JVM_CONSTANT_Integer: {
258 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
259 const u4 bytes = cfs->get_u4_fast();
260 cp->int_at_put(index, (jint)bytes);
261 break;
262 }
263 case JVM_CONSTANT_Float: {
264 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
265 const u4 bytes = cfs->get_u4_fast();
266 cp->float_at_put(index, *(jfloat*)&bytes);
267 break;
268 }
269 case JVM_CONSTANT_Long: {
270 // A mangled type might cause you to overrun allocated memory
271 guarantee_property(index + 1 < length,
272 "Invalid constant pool entry %u in class file %s",
273 index,
274 CHECK);
275 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
276 const u8 bytes = cfs->get_u8_fast();
277 cp->long_at_put(index, bytes);
278 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
279 break;
280 }
281 case JVM_CONSTANT_Double: {
282 // A mangled type might cause you to overrun allocated memory
283 guarantee_property(index+1 < length,
284 "Invalid constant pool entry %u in class file %s",
285 index,
286 CHECK);
287 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
288 const u8 bytes = cfs->get_u8_fast();
289 cp->double_at_put(index, *(jdouble*)&bytes);
290 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
291 break;
292 }
293 case JVM_CONSTANT_NameAndType: {
294 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
295 const u2 name_index = cfs->get_u2_fast();
296 const u2 signature_index = cfs->get_u2_fast();
297 cp->name_and_type_at_put(index, name_index, signature_index);
298 break;
299 }
300 case JVM_CONSTANT_Utf8 : {
301 cfs->guarantee_more(2, CHECK); // utf8_length
302 u2 utf8_length = cfs->get_u2_fast();
303 const u1* utf8_buffer = cfs->current();
304 assert(utf8_buffer != NULL, "null utf8 buffer");
305 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
306 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
307 cfs->skip_u1_fast(utf8_length);
308
309 // Before storing the symbol, make sure it's legal
310 if (_need_verify) {
311 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
312 }
313
314 if (has_cp_patch_at(index)) {
315 Handle patch = clear_cp_patch_at(index);
316 guarantee_property(java_lang_String::is_instance(patch()),
317 "Illegal utf8 patch at %d in class file %s",
318 index,
319 CHECK);
320 const char* const str = java_lang_String::as_utf8_string(patch());
321 // (could use java_lang_String::as_symbol instead, but might as well batch them)
322 utf8_buffer = (const u1*) str;
323 utf8_length = (u2) strlen(str);
324 }
325
326 unsigned int hash;
327 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
328 utf8_length,
329 hash);
330 if (result == NULL) {
331 names[names_count] = (const char*)utf8_buffer;
332 lengths[names_count] = utf8_length;
333 indices[names_count] = index;
334 hashValues[names_count++] = hash;
335 if (names_count == SymbolTable::symbol_alloc_batch_size) {
336 SymbolTable::new_symbols(_loader_data,
337 constantPoolHandle(THREAD, cp),
338 names_count,
339 names,
340 lengths,
341 indices,
342 hashValues);
343 names_count = 0;
344 }
345 } else {
346 cp->symbol_at_put(index, result);
347 }
348 break;
349 }
350 case JVM_CONSTANT_Module:
351 case JVM_CONSTANT_Package: {
352 // Record that an error occurred in these two cases but keep parsing so
353 // that ACC_Module can be checked for in the access_flags. Need to
354 // throw NoClassDefFoundError in that case.
355 if (_major_version >= JAVA_9_VERSION) {
356 cfs->guarantee_more(3, CHECK);
357 cfs->get_u2_fast();
358 set_class_bad_constant_seen(tag);
359 break;
360 }
361 }
362 default: {
363 classfile_parse_error("Unknown constant tag %u in class file %s",
364 tag,
365 CHECK);
366 break;
367 }
368 } // end of switch(tag)
369 } // end of for
370
371 // Allocate the remaining symbols
372 if (names_count > 0) {
373 SymbolTable::new_symbols(_loader_data,
374 constantPoolHandle(THREAD, cp),
375 names_count,
376 names,
377 lengths,
378 indices,
379 hashValues);
380 }
381
382 // Copy _current pointer of local copy back to stream.
383 assert(stream->current() == old_current, "non-exclusive use of stream");
384 stream->set_current(cfs1.current());
385
386 }
387
388 static inline bool valid_cp_range(int index, int length) {
389 return (index > 0 && index < length);
390 }
391
392 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
393 assert(cp != NULL, "invariant");
394 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
395 return cp->symbol_at(index);
396 }
397 return NULL;
398 }
399
400 #ifdef ASSERT
401 PRAGMA_DIAG_PUSH
402 PRAGMA_FORMAT_NONLITERAL_IGNORED
403 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
404 ResourceMark rm(THREAD);
405 fatal(msg, _class_name->as_C_string());
406 }
407
408 void ClassFileParser::report_assert_property_failure(const char* msg,
409 int index,
410 TRAPS) const {
411 ResourceMark rm(THREAD);
412 fatal(msg, index, _class_name->as_C_string());
413 }
414 PRAGMA_DIAG_POP
415 #endif
416
417 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
418 ConstantPool* const cp,
419 const int length,
420 TRAPS) {
421 assert(cp != NULL, "invariant");
422 assert(stream != NULL, "invariant");
423
424 // parsing constant pool entries
425 parse_constant_pool_entries(stream, cp, length, CHECK);
426 if (class_bad_constant_seen() != 0) {
427 // a bad CP entry has been detected previously so stop parsing and just return.
428 return;
429 }
430
431 int index = 1; // declared outside of loops for portability
432 int num_klasses = 0;
433
434 // first verification pass - validate cross references
435 // and fixup class and string constants
436 for (index = 1; index < length; index++) { // Index 0 is unused
437 const jbyte tag = cp->tag_at(index).value();
438 switch (tag) {
439 case JVM_CONSTANT_Class: {
440 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
441 break;
442 }
443 case JVM_CONSTANT_Fieldref:
444 // fall through
445 case JVM_CONSTANT_Methodref:
446 // fall through
447 case JVM_CONSTANT_InterfaceMethodref: {
448 if (!_need_verify) break;
449 const int klass_ref_index = cp->klass_ref_index_at(index);
450 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
451 check_property(valid_klass_reference_at(klass_ref_index),
452 "Invalid constant pool index %u in class file %s",
453 klass_ref_index, CHECK);
454 check_property(valid_cp_range(name_and_type_ref_index, length) &&
455 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
456 "Invalid constant pool index %u in class file %s",
457 name_and_type_ref_index, CHECK);
458 break;
459 }
460 case JVM_CONSTANT_String: {
461 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
462 break;
463 }
464 case JVM_CONSTANT_Integer:
465 break;
466 case JVM_CONSTANT_Float:
467 break;
468 case JVM_CONSTANT_Long:
469 case JVM_CONSTANT_Double: {
470 index++;
471 check_property(
472 (index < length && cp->tag_at(index).is_invalid()),
473 "Improper constant pool long/double index %u in class file %s",
474 index, CHECK);
475 break;
476 }
477 case JVM_CONSTANT_NameAndType: {
478 if (!_need_verify) break;
479 const int name_ref_index = cp->name_ref_index_at(index);
480 const int signature_ref_index = cp->signature_ref_index_at(index);
481 check_property(valid_symbol_at(name_ref_index),
482 "Invalid constant pool index %u in class file %s",
483 name_ref_index, CHECK);
484 check_property(valid_symbol_at(signature_ref_index),
485 "Invalid constant pool index %u in class file %s",
486 signature_ref_index, CHECK);
487 break;
488 }
489 case JVM_CONSTANT_Utf8:
490 break;
491 case JVM_CONSTANT_UnresolvedClass: // fall-through
492 case JVM_CONSTANT_UnresolvedClassInError: {
493 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
494 break;
495 }
496 case JVM_CONSTANT_ClassIndex: {
497 const int class_index = cp->klass_index_at(index);
498 check_property(valid_symbol_at(class_index),
499 "Invalid constant pool index %u in class file %s",
500 class_index, CHECK);
501 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
502 break;
503 }
504 case JVM_CONSTANT_StringIndex: {
505 const int string_index = cp->string_index_at(index);
506 check_property(valid_symbol_at(string_index),
507 "Invalid constant pool index %u in class file %s",
508 string_index, CHECK);
509 Symbol* const sym = cp->symbol_at(string_index);
510 cp->unresolved_string_at_put(index, sym);
511 break;
512 }
513 case JVM_CONSTANT_MethodHandle: {
514 const int ref_index = cp->method_handle_index_at(index);
515 check_property(valid_cp_range(ref_index, length),
516 "Invalid constant pool index %u in class file %s",
517 ref_index, CHECK);
518 const constantTag tag = cp->tag_at(ref_index);
519 const int ref_kind = cp->method_handle_ref_kind_at(index);
520
521 switch (ref_kind) {
522 case JVM_REF_getField:
523 case JVM_REF_getStatic:
524 case JVM_REF_putField:
525 case JVM_REF_putStatic: {
526 check_property(
527 tag.is_field(),
528 "Invalid constant pool index %u in class file %s (not a field)",
529 ref_index, CHECK);
530 break;
531 }
532 case JVM_REF_invokeVirtual:
533 case JVM_REF_newInvokeSpecial: {
534 check_property(
535 tag.is_method(),
536 "Invalid constant pool index %u in class file %s (not a method)",
537 ref_index, CHECK);
538 break;
539 }
540 case JVM_REF_invokeStatic:
541 case JVM_REF_invokeSpecial: {
542 check_property(
543 tag.is_method() ||
544 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
545 "Invalid constant pool index %u in class file %s (not a method)",
546 ref_index, CHECK);
547 break;
548 }
549 case JVM_REF_invokeInterface: {
550 check_property(
551 tag.is_interface_method(),
552 "Invalid constant pool index %u in class file %s (not an interface method)",
553 ref_index, CHECK);
554 break;
555 }
556 default: {
557 classfile_parse_error(
558 "Bad method handle kind at constant pool index %u in class file %s",
559 index, CHECK);
560 }
561 } // switch(refkind)
562 // Keep the ref_index unchanged. It will be indirected at link-time.
563 break;
564 } // case MethodHandle
565 case JVM_CONSTANT_MethodType: {
566 const int ref_index = cp->method_type_index_at(index);
567 check_property(valid_symbol_at(ref_index),
568 "Invalid constant pool index %u in class file %s",
569 ref_index, CHECK);
570 break;
571 }
572 case JVM_CONSTANT_Dynamic: {
573 const int name_and_type_ref_index =
574 cp->bootstrap_name_and_type_ref_index_at(index);
575
576 check_property(valid_cp_range(name_and_type_ref_index, length) &&
577 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
578 "Invalid constant pool index %u in class file %s",
579 name_and_type_ref_index, CHECK);
580 // bootstrap specifier index must be checked later,
581 // when BootstrapMethods attr is available
582
583 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
584 cp->set_has_dynamic_constant();
585 break;
586 }
587 case JVM_CONSTANT_InvokeDynamic: {
588 const int name_and_type_ref_index =
589 cp->bootstrap_name_and_type_ref_index_at(index);
590
591 check_property(valid_cp_range(name_and_type_ref_index, length) &&
592 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
593 "Invalid constant pool index %u in class file %s",
594 name_and_type_ref_index, CHECK);
595 // bootstrap specifier index must be checked later,
596 // when BootstrapMethods attr is available
597 break;
598 }
599 default: {
600 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
601 ShouldNotReachHere();
602 break;
603 }
604 } // switch(tag)
605 } // end of for
606
607 _first_patched_klass_resolved_index = num_klasses;
608 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
609
610 if (_cp_patches != NULL) {
611 // need to treat this_class specially...
612
613 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
614 // for now. These will be replaced with actual names of the patched classes in patch_class().
615 Symbol* s = vmSymbols::star_name();
616 for (int n=_orig_cp_size; n<cp->length(); n++) {
617 cp->symbol_at_put(n, s);
618 }
619
620 int this_class_index;
621 {
622 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
623 const u1* const mark = stream->current();
624 stream->skip_u2_fast(1); // skip flags
625 this_class_index = stream->get_u2_fast();
626 stream->set_current(mark); // revert to mark
627 }
628
629 for (index = 1; index < length; index++) { // Index 0 is unused
630 if (has_cp_patch_at(index)) {
631 guarantee_property(index != this_class_index,
632 "Illegal constant pool patch to self at %d in class file %s",
633 index, CHECK);
634 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
635 }
636 }
637 }
638
639 if (!_need_verify) {
640 return;
641 }
642
643 // second verification pass - checks the strings are of the right format.
644 // but not yet to the other entries
645 for (index = 1; index < length; index++) {
646 const jbyte tag = cp->tag_at(index).value();
647 switch (tag) {
648 case JVM_CONSTANT_UnresolvedClass: {
649 const Symbol* const class_name = cp->klass_name_at(index);
650 // check the name, even if _cp_patches will overwrite it
651 verify_legal_class_name(class_name, CHECK);
652 break;
653 }
654 case JVM_CONSTANT_NameAndType: {
655 if (_need_verify) {
656 const int sig_index = cp->signature_ref_index_at(index);
657 const int name_index = cp->name_ref_index_at(index);
658 const Symbol* const name = cp->symbol_at(name_index);
659 const Symbol* const sig = cp->symbol_at(sig_index);
660 guarantee_property(sig->utf8_length() != 0,
661 "Illegal zero length constant pool entry at %d in class %s",
662 sig_index, CHECK);
663 guarantee_property(name->utf8_length() != 0,
664 "Illegal zero length constant pool entry at %d in class %s",
665 name_index, CHECK);
666
667 if (sig->char_at(0) == JVM_SIGNATURE_FUNC) {
668 // Format check method name and signature
669 verify_legal_method_name(name, CHECK);
670 verify_legal_method_signature(name, sig, CHECK);
671 } else {
672 // Format check field name and signature
673 verify_legal_field_name(name, CHECK);
674 verify_legal_field_signature(name, sig, CHECK);
675 }
676 }
677 break;
678 }
679 case JVM_CONSTANT_Dynamic: {
680 const int name_and_type_ref_index =
681 cp->name_and_type_ref_index_at(index);
682 // already verified to be utf8
683 const int name_ref_index =
684 cp->name_ref_index_at(name_and_type_ref_index);
685 // already verified to be utf8
686 const int signature_ref_index =
687 cp->signature_ref_index_at(name_and_type_ref_index);
688 const Symbol* const name = cp->symbol_at(name_ref_index);
689 const Symbol* const signature = cp->symbol_at(signature_ref_index);
690 if (_need_verify) {
691 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
692 // Need only to be sure signature is non-zero length and the right type.
693 if (signature->utf8_length() == 0 ||
694 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
695 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
696 }
697 }
698 break;
699 }
700 case JVM_CONSTANT_InvokeDynamic:
701 case JVM_CONSTANT_Fieldref:
702 case JVM_CONSTANT_Methodref:
703 case JVM_CONSTANT_InterfaceMethodref: {
704 const int name_and_type_ref_index =
705 cp->name_and_type_ref_index_at(index);
706 // already verified to be utf8
707 const int name_ref_index =
708 cp->name_ref_index_at(name_and_type_ref_index);
709 // already verified to be utf8
710 const int signature_ref_index =
711 cp->signature_ref_index_at(name_and_type_ref_index);
712 const Symbol* const name = cp->symbol_at(name_ref_index);
713 const Symbol* const signature = cp->symbol_at(signature_ref_index);
714 if (tag == JVM_CONSTANT_Fieldref) {
715 if (_need_verify) {
716 // Field name and signature are verified above, when iterating NameAndType_info.
717 // Need only to be sure signature is non-zero length and the right type.
718 if (signature->utf8_length() == 0 ||
719 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
720 throwIllegalSignature("Field", name, signature, CHECK);
721 }
722 }
723 } else {
724 if (_need_verify) {
725 // Method name and signature are verified above, when iterating NameAndType_info.
726 // Need only to be sure signature is non-zero length and the right type.
727 if (signature->utf8_length() == 0 ||
728 signature->char_at(0) != JVM_SIGNATURE_FUNC) {
729 throwIllegalSignature("Method", name, signature, CHECK);
730 }
731 }
732 // 4509014: If a class method name begins with '<', it must be "<init>"
733 const unsigned int name_len = name->utf8_length();
734 if (tag == JVM_CONSTANT_Methodref &&
735 name_len != 0 &&
736 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
737 name != vmSymbols::object_initializer_name()) {
738 classfile_parse_error(
739 "Bad method name at constant pool index %u in class file %s",
740 name_ref_index, CHECK);
741 }
742 }
743 break;
744 }
745 case JVM_CONSTANT_MethodHandle: {
746 const int ref_index = cp->method_handle_index_at(index);
747 const int ref_kind = cp->method_handle_ref_kind_at(index);
748 switch (ref_kind) {
749 case JVM_REF_invokeVirtual:
750 case JVM_REF_invokeStatic:
751 case JVM_REF_invokeSpecial:
752 case JVM_REF_newInvokeSpecial: {
753 const int name_and_type_ref_index =
754 cp->name_and_type_ref_index_at(ref_index);
755 const int name_ref_index =
756 cp->name_ref_index_at(name_and_type_ref_index);
757 const Symbol* const name = cp->symbol_at(name_ref_index);
758 if (ref_kind == JVM_REF_newInvokeSpecial) {
759 if (name != vmSymbols::object_initializer_name()) {
760 classfile_parse_error(
761 "Bad constructor name at constant pool index %u in class file %s",
762 name_ref_index, CHECK);
763 }
764 } else {
765 if (name == vmSymbols::object_initializer_name()) {
766 classfile_parse_error(
767 "Bad method name at constant pool index %u in class file %s",
768 name_ref_index, CHECK);
769 }
770 }
771 break;
772 }
773 // Other ref_kinds are already fully checked in previous pass.
774 } // switch(ref_kind)
775 break;
776 }
777 case JVM_CONSTANT_MethodType: {
778 const Symbol* const no_name = vmSymbols::type_name(); // place holder
779 const Symbol* const signature = cp->method_type_signature_at(index);
780 verify_legal_method_signature(no_name, signature, CHECK);
781 break;
782 }
783 case JVM_CONSTANT_Utf8: {
784 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
785 }
786 } // switch(tag)
787 } // end of for
788 }
789
790 Handle ClassFileParser::clear_cp_patch_at(int index) {
791 Handle patch = cp_patch_at(index);
792 _cp_patches->at_put(index, Handle());
793 assert(!has_cp_patch_at(index), "");
794 return patch;
795 }
796
797 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
798 int name_index = _orig_cp_size + _num_patched_klasses;
799 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
800
801 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
802 _num_patched_klasses ++;
803 }
804
805 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
806 int index,
807 Handle patch,
808 TRAPS) {
809 assert(cp != NULL, "invariant");
810
811 BasicType patch_type = T_VOID;
812
813 switch (cp->tag_at(index).value()) {
814
815 case JVM_CONSTANT_UnresolvedClass: {
816 // Patching a class means pre-resolving it.
817 // The name in the constant pool is ignored.
818 if (java_lang_Class::is_instance(patch())) {
819 guarantee_property(!java_lang_Class::is_primitive(patch()),
820 "Illegal class patch at %d in class file %s",
821 index, CHECK);
822 Klass* k = java_lang_Class::as_Klass(patch());
823 patch_class(cp, index, k, k->name());
824 } else {
825 guarantee_property(java_lang_String::is_instance(patch()),
826 "Illegal class patch at %d in class file %s",
827 index, CHECK);
828 Symbol* const name = java_lang_String::as_symbol(patch());
829 patch_class(cp, index, NULL, name);
830 }
831 break;
832 }
833
834 case JVM_CONSTANT_String: {
835 // skip this patch and don't clear it. Needs the oop array for resolved
836 // references to be created first.
837 return;
838 }
839 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
840 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
841 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
842 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
843 patch_prim:
844 {
845 jvalue value;
846 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
847 guarantee_property(value_type == patch_type,
848 "Illegal primitive patch at %d in class file %s",
849 index, CHECK);
850 switch (value_type) {
851 case T_INT: cp->int_at_put(index, value.i); break;
852 case T_FLOAT: cp->float_at_put(index, value.f); break;
853 case T_LONG: cp->long_at_put(index, value.j); break;
854 case T_DOUBLE: cp->double_at_put(index, value.d); break;
855 default: assert(false, "");
856 }
857 } // end patch_prim label
858 break;
859
860 default: {
861 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
862 guarantee_property(!has_cp_patch_at(index),
863 "Illegal unexpected patch at %d in class file %s",
864 index, CHECK);
865 return;
866 }
867 } // end of switch(tag)
868
869 // On fall-through, mark the patch as used.
870 clear_cp_patch_at(index);
871 }
872 class NameSigHash: public ResourceObj {
873 public:
874 const Symbol* _name; // name
875 const Symbol* _sig; // signature
876 NameSigHash* _next; // Next entry in hash table
877 };
878
879 static const int HASH_ROW_SIZE = 256;
880
881 static unsigned int hash(const Symbol* name, const Symbol* sig) {
882 unsigned int raw_hash = 0;
883 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
884 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
885
886 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
887 }
888
889
890 static void initialize_hashtable(NameSigHash** table) {
891 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
892 }
893 // Return false if the name/sig combination is found in table.
894 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
895 // The old format checker uses heap sort to find duplicates.
896 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
897 // of table since we don't expect Symbol*'s to move.
898 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
899 assert(name != NULL, "name in constant pool is NULL");
900
901 // First lookup for duplicates
902 int index = hash(name, sig);
903 NameSigHash* entry = table[index];
904 while (entry != NULL) {
905 if (entry->_name == name && entry->_sig == sig) {
906 return false;
907 }
908 entry = entry->_next;
909 }
910
911 // No duplicate is found, allocate a new entry and fill it.
912 entry = new NameSigHash();
913 entry->_name = name;
914 entry->_sig = sig;
915
916 // Insert into hash table
917 entry->_next = table[index];
918 table[index] = entry;
919
920 return true;
921 }
922
923 // Side-effects: populates the _local_interfaces field
924 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
925 const int itfs_len,
926 ConstantPool* const cp,
927 bool* const has_nonstatic_concrete_methods,
928 TRAPS) {
929 assert(stream != NULL, "invariant");
930 assert(cp != NULL, "invariant");
931 assert(has_nonstatic_concrete_methods != NULL, "invariant");
932
933 if (itfs_len == 0) {
934 _local_interfaces = Universe::the_empty_instance_klass_array();
935 } else {
936 assert(itfs_len > 0, "only called for len>0");
937 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
938
939 int index;
940 for (index = 0; index < itfs_len; index++) {
941 const u2 interface_index = stream->get_u2(CHECK);
942 Klass* interf;
943 check_property(
944 valid_klass_reference_at(interface_index),
945 "Interface name has bad constant pool index %u in class file %s",
946 interface_index, CHECK);
947 if (cp->tag_at(interface_index).is_klass()) {
948 interf = cp->resolved_klass_at(interface_index);
949 } else {
950 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
951
952 // Don't need to check legal name because it's checked when parsing constant pool.
953 // But need to make sure it's not an array type.
954 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
955 "Bad interface name in class file %s", CHECK);
956
957 // Call resolve_super so classcircularity is checked
958 interf = SystemDictionary::resolve_super_or_fail(
959 _class_name,
960 unresolved_klass,
961 Handle(THREAD, _loader_data->class_loader()),
962 _protection_domain,
963 false,
964 CHECK);
965 }
966
967 if (!interf->is_interface()) {
968 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
969 err_msg("class %s can not implement %s, because it is not an interface (%s)",
970 _class_name->as_klass_external_name(),
971 interf->external_name(),
972 interf->class_in_module_of_loader()));
973 }
974
975 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
976 *has_nonstatic_concrete_methods = true;
977 }
978 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
979 }
980
981 if (!_need_verify || itfs_len <= 1) {
982 return;
983 }
984
985 // Check if there's any duplicates in interfaces
986 ResourceMark rm(THREAD);
987 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
988 NameSigHash*,
989 HASH_ROW_SIZE);
990 initialize_hashtable(interface_names);
991 bool dup = false;
992 const Symbol* name = NULL;
993 {
994 debug_only(NoSafepointVerifier nsv;)
995 for (index = 0; index < itfs_len; index++) {
996 const InstanceKlass* const k = _local_interfaces->at(index);
997 name = k->name();
998 // If no duplicates, add (name, NULL) in hashtable interface_names.
999 if (!put_after_lookup(name, NULL, interface_names)) {
1000 dup = true;
1001 break;
1002 }
1003 }
1004 }
1005 if (dup) {
1006 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
1007 name->as_C_string(), CHECK);
1008 }
1009 }
1010 }
1011
1012 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
1013 int constantvalue_index,
1014 int signature_index,
1015 TRAPS) const {
1016 // Make sure the constant pool entry is of a type appropriate to this field
1017 guarantee_property(
1018 (constantvalue_index > 0 &&
1019 constantvalue_index < cp->length()),
1020 "Bad initial value index %u in ConstantValue attribute in class file %s",
1021 constantvalue_index, CHECK);
1022
1023 const constantTag value_type = cp->tag_at(constantvalue_index);
1024 switch(cp->basic_type_for_signature_at(signature_index)) {
1025 case T_LONG: {
1026 guarantee_property(value_type.is_long(),
1027 "Inconsistent constant value type in class file %s",
1028 CHECK);
1029 break;
1030 }
1031 case T_FLOAT: {
1032 guarantee_property(value_type.is_float(),
1033 "Inconsistent constant value type in class file %s",
1034 CHECK);
1035 break;
1036 }
1037 case T_DOUBLE: {
1038 guarantee_property(value_type.is_double(),
1039 "Inconsistent constant value type in class file %s",
1040 CHECK);
1041 break;
1042 }
1043 case T_BYTE:
1044 case T_CHAR:
1045 case T_SHORT:
1046 case T_BOOLEAN:
1047 case T_INT: {
1048 guarantee_property(value_type.is_int(),
1049 "Inconsistent constant value type in class file %s",
1050 CHECK);
1051 break;
1052 }
1053 case T_OBJECT: {
1054 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1055 && value_type.is_string()),
1056 "Bad string initial value in class file %s",
1057 CHECK);
1058 break;
1059 }
1060 default: {
1061 classfile_parse_error("Unable to set initial value %u in class file %s",
1062 constantvalue_index,
1063 CHECK);
1064 }
1065 }
1066 }
1067
1068 class AnnotationCollector : public ResourceObj{
1069 public:
1070 enum Location { _in_field, _in_method, _in_class };
1071 enum ID {
1072 _unknown = 0,
1073 _method_CallerSensitive,
1074 _method_ForceInline,
1075 _method_DontInline,
1076 _method_InjectedProfile,
1077 _method_LambdaForm_Compiled,
1078 _method_Hidden,
1079 _method_HotSpotIntrinsicCandidate,
1080 _jdk_internal_vm_annotation_Contended,
1081 _field_Stable,
1082 _jdk_internal_vm_annotation_ReservedStackAccess,
1083 _annotation_LIMIT
1084 };
1085 const Location _location;
1086 int _annotations_present;
1087 u2 _contended_group;
1088
1089 AnnotationCollector(Location location)
1090 : _location(location), _annotations_present(0)
1091 {
1092 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1093 }
1094 // If this annotation name has an ID, report it (or _none).
1095 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1096 // Set the annotation name:
1097 void set_annotation(ID id) {
1098 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1099 _annotations_present |= nth_bit((int)id);
1100 }
1101
1102 void remove_annotation(ID id) {
1103 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1104 _annotations_present &= ~nth_bit((int)id);
1105 }
1106
1107 // Report if the annotation is present.
1108 bool has_any_annotations() const { return _annotations_present != 0; }
1109 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1110
1111 void set_contended_group(u2 group) { _contended_group = group; }
1112 u2 contended_group() const { return _contended_group; }
1113
1114 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1115
1116 void set_stable(bool stable) { set_annotation(_field_Stable); }
1117 bool is_stable() const { return has_annotation(_field_Stable); }
1118 };
1119
1120 // This class also doubles as a holder for metadata cleanup.
1121 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1122 private:
1123 ClassLoaderData* _loader_data;
1124 AnnotationArray* _field_annotations;
1125 AnnotationArray* _field_type_annotations;
1126 public:
1127 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1128 AnnotationCollector(_in_field),
1129 _loader_data(loader_data),
1130 _field_annotations(NULL),
1131 _field_type_annotations(NULL) {}
1132 ~FieldAnnotationCollector();
1133 void apply_to(FieldInfo* f);
1134 AnnotationArray* field_annotations() { return _field_annotations; }
1135 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1136
1137 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1138 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1139 };
1140
1141 class MethodAnnotationCollector : public AnnotationCollector{
1142 public:
1143 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1144 void apply_to(const methodHandle& m);
1145 };
1146
1147 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1148 public:
1149 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1150 void apply_to(InstanceKlass* ik);
1151 };
1152
1153
1154 static int skip_annotation_value(const u1*, int, int); // fwd decl
1155
1156 // Safely increment index by val if does not pass limit
1157 #define SAFE_ADD(index, limit, val) \
1158 if (index >= limit - val) return limit; \
1159 index += val;
1160
1161 // Skip an annotation. Return >=limit if there is any problem.
1162 static int skip_annotation(const u1* buffer, int limit, int index) {
1163 assert(buffer != NULL, "invariant");
1164 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1165 // value := switch (tag:u1) { ... }
1166 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1167 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1168 while (--nmem >= 0 && index < limit) {
1169 SAFE_ADD(index, limit, 2); // skip member
1170 index = skip_annotation_value(buffer, limit, index);
1171 }
1172 return index;
1173 }
1174
1175 // Skip an annotation value. Return >=limit if there is any problem.
1176 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1177 assert(buffer != NULL, "invariant");
1178
1179 // value := switch (tag:u1) {
1180 // case B, C, I, S, Z, D, F, J, c: con:u2;
1181 // case e: e_class:u2 e_name:u2;
1182 // case s: s_con:u2;
1183 // case [: do(nval:u2) {value};
1184 // case @: annotation;
1185 // case s: s_con:u2;
1186 // }
1187 SAFE_ADD(index, limit, 1); // read tag
1188 const u1 tag = buffer[index - 1];
1189 switch (tag) {
1190 case 'B':
1191 case 'C':
1192 case 'I':
1193 case 'S':
1194 case 'Z':
1195 case 'D':
1196 case 'F':
1197 case 'J':
1198 case 'c':
1199 case 's':
1200 SAFE_ADD(index, limit, 2); // skip con or s_con
1201 break;
1202 case 'e':
1203 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1204 break;
1205 case '[':
1206 {
1207 SAFE_ADD(index, limit, 2); // read nval
1208 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1209 while (--nval >= 0 && index < limit) {
1210 index = skip_annotation_value(buffer, limit, index);
1211 }
1212 }
1213 break;
1214 case '@':
1215 index = skip_annotation(buffer, limit, index);
1216 break;
1217 default:
1218 return limit; // bad tag byte
1219 }
1220 return index;
1221 }
1222
1223 // Sift through annotations, looking for those significant to the VM:
1224 static void parse_annotations(const ConstantPool* const cp,
1225 const u1* buffer, int limit,
1226 AnnotationCollector* coll,
1227 ClassLoaderData* loader_data,
1228 TRAPS) {
1229
1230 assert(cp != NULL, "invariant");
1231 assert(buffer != NULL, "invariant");
1232 assert(coll != NULL, "invariant");
1233 assert(loader_data != NULL, "invariant");
1234
1235 // annotations := do(nann:u2) {annotation}
1236 int index = 2; // read nann
1237 if (index >= limit) return;
1238 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1239 enum { // initial annotation layout
1240 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1241 count_off = 2, // u2 such as 1 (one value)
1242 member_off = 4, // utf8 such as 'value'
1243 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1244 e_tag_val = 'e',
1245 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1246 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1247 e_size = 11, // end of 'e' annotation
1248 c_tag_val = 'c', // payload is type
1249 c_con_off = 7, // utf8 payload, such as 'I'
1250 c_size = 9, // end of 'c' annotation
1251 s_tag_val = 's', // payload is String
1252 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1253 s_size = 9,
1254 min_size = 6 // smallest possible size (zero members)
1255 };
1256 // Cannot add min_size to index in case of overflow MAX_INT
1257 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1258 int index0 = index;
1259 index = skip_annotation(buffer, limit, index);
1260 const u1* const abase = buffer + index0;
1261 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1262 const int count = Bytes::get_Java_u2((address)abase + count_off);
1263 const Symbol* const aname = check_symbol_at(cp, atype);
1264 if (aname == NULL) break; // invalid annotation name
1265 const Symbol* member = NULL;
1266 if (count >= 1) {
1267 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1268 member = check_symbol_at(cp, member_index);
1269 if (member == NULL) break; // invalid member name
1270 }
1271
1272 // Here is where parsing particular annotations will take place.
1273 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1274 if (AnnotationCollector::_unknown == id) continue;
1275 coll->set_annotation(id);
1276
1277 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1278 // @Contended can optionally specify the contention group.
1279 //
1280 // Contended group defines the equivalence class over the fields:
1281 // the fields within the same contended group are not treated distinct.
1282 // The only exception is default group, which does not incur the
1283 // equivalence. Naturally, contention group for classes is meaningless.
1284 //
1285 // While the contention group is specified as String, annotation
1286 // values are already interned, and we might as well use the constant
1287 // pool index as the group tag.
1288 //
1289 u2 group_index = 0; // default contended group
1290 if (count == 1
1291 && s_size == (index - index0) // match size
1292 && s_tag_val == *(abase + tag_off)
1293 && member == vmSymbols::value_name()) {
1294 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1295 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1296 group_index = 0; // default contended group
1297 }
1298 }
1299 coll->set_contended_group(group_index);
1300 }
1301 }
1302 }
1303
1304
1305 // Parse attributes for a field.
1306 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1307 u2 attributes_count,
1308 bool is_static, u2 signature_index,
1309 u2* const constantvalue_index_addr,
1310 bool* const is_synthetic_addr,
1311 u2* const generic_signature_index_addr,
1312 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1313 TRAPS) {
1314 assert(cfs != NULL, "invariant");
1315 assert(constantvalue_index_addr != NULL, "invariant");
1316 assert(is_synthetic_addr != NULL, "invariant");
1317 assert(generic_signature_index_addr != NULL, "invariant");
1318 assert(parsed_annotations != NULL, "invariant");
1319 assert(attributes_count > 0, "attributes_count should be greater than 0");
1320
1321 u2 constantvalue_index = 0;
1322 u2 generic_signature_index = 0;
1323 bool is_synthetic = false;
1324 const u1* runtime_visible_annotations = NULL;
1325 int runtime_visible_annotations_length = 0;
1326 const u1* runtime_invisible_annotations = NULL;
1327 int runtime_invisible_annotations_length = 0;
1328 const u1* runtime_visible_type_annotations = NULL;
1329 int runtime_visible_type_annotations_length = 0;
1330 const u1* runtime_invisible_type_annotations = NULL;
1331 int runtime_invisible_type_annotations_length = 0;
1332 bool runtime_invisible_annotations_exists = false;
1333 bool runtime_invisible_type_annotations_exists = false;
1334 const ConstantPool* const cp = _cp;
1335
1336 while (attributes_count--) {
1337 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1338 const u2 attribute_name_index = cfs->get_u2_fast();
1339 const u4 attribute_length = cfs->get_u4_fast();
1340 check_property(valid_symbol_at(attribute_name_index),
1341 "Invalid field attribute index %u in class file %s",
1342 attribute_name_index,
1343 CHECK);
1344
1345 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1346 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1347 // ignore if non-static
1348 if (constantvalue_index != 0) {
1349 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1350 }
1351 check_property(
1352 attribute_length == 2,
1353 "Invalid ConstantValue field attribute length %u in class file %s",
1354 attribute_length, CHECK);
1355
1356 constantvalue_index = cfs->get_u2(CHECK);
1357 if (_need_verify) {
1358 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1359 }
1360 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1361 if (attribute_length != 0) {
1362 classfile_parse_error(
1363 "Invalid Synthetic field attribute length %u in class file %s",
1364 attribute_length, CHECK);
1365 }
1366 is_synthetic = true;
1367 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1368 if (attribute_length != 0) {
1369 classfile_parse_error(
1370 "Invalid Deprecated field attribute length %u in class file %s",
1371 attribute_length, CHECK);
1372 }
1373 } else if (_major_version >= JAVA_1_5_VERSION) {
1374 if (attribute_name == vmSymbols::tag_signature()) {
1375 if (generic_signature_index != 0) {
1376 classfile_parse_error(
1377 "Multiple Signature attributes for field in class file %s", CHECK);
1378 }
1379 if (attribute_length != 2) {
1380 classfile_parse_error(
1381 "Wrong size %u for field's Signature attribute in class file %s",
1382 attribute_length, CHECK);
1383 }
1384 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1385 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1386 if (runtime_visible_annotations != NULL) {
1387 classfile_parse_error(
1388 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1389 }
1390 runtime_visible_annotations_length = attribute_length;
1391 runtime_visible_annotations = cfs->current();
1392 assert(runtime_visible_annotations != NULL, "null visible annotations");
1393 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1394 parse_annotations(cp,
1395 runtime_visible_annotations,
1396 runtime_visible_annotations_length,
1397 parsed_annotations,
1398 _loader_data,
1399 CHECK);
1400 cfs->skip_u1_fast(runtime_visible_annotations_length);
1401 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1402 if (runtime_invisible_annotations_exists) {
1403 classfile_parse_error(
1404 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1405 }
1406 runtime_invisible_annotations_exists = true;
1407 if (PreserveAllAnnotations) {
1408 runtime_invisible_annotations_length = attribute_length;
1409 runtime_invisible_annotations = cfs->current();
1410 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1411 }
1412 cfs->skip_u1(attribute_length, CHECK);
1413 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1414 if (runtime_visible_type_annotations != NULL) {
1415 classfile_parse_error(
1416 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1417 }
1418 runtime_visible_type_annotations_length = attribute_length;
1419 runtime_visible_type_annotations = cfs->current();
1420 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1421 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1422 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1423 if (runtime_invisible_type_annotations_exists) {
1424 classfile_parse_error(
1425 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1426 } else {
1427 runtime_invisible_type_annotations_exists = true;
1428 }
1429 if (PreserveAllAnnotations) {
1430 runtime_invisible_type_annotations_length = attribute_length;
1431 runtime_invisible_type_annotations = cfs->current();
1432 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1433 }
1434 cfs->skip_u1(attribute_length, CHECK);
1435 } else {
1436 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1437 }
1438 } else {
1439 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1440 }
1441 }
1442
1443 *constantvalue_index_addr = constantvalue_index;
1444 *is_synthetic_addr = is_synthetic;
1445 *generic_signature_index_addr = generic_signature_index;
1446 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1447 runtime_visible_annotations_length,
1448 runtime_invisible_annotations,
1449 runtime_invisible_annotations_length,
1450 CHECK);
1451 parsed_annotations->set_field_annotations(a);
1452 a = assemble_annotations(runtime_visible_type_annotations,
1453 runtime_visible_type_annotations_length,
1454 runtime_invisible_type_annotations,
1455 runtime_invisible_type_annotations_length,
1456 CHECK);
1457 parsed_annotations->set_field_type_annotations(a);
1458 return;
1459 }
1460
1461
1462 // Field allocation types. Used for computing field offsets.
1463
1464 enum FieldAllocationType {
1465 STATIC_OOP, // Oops
1466 STATIC_BYTE, // Boolean, Byte, char
1467 STATIC_SHORT, // shorts
1468 STATIC_WORD, // ints
1469 STATIC_DOUBLE, // aligned long or double
1470 NONSTATIC_OOP,
1471 NONSTATIC_BYTE,
1472 NONSTATIC_SHORT,
1473 NONSTATIC_WORD,
1474 NONSTATIC_DOUBLE,
1475 MAX_FIELD_ALLOCATION_TYPE,
1476 BAD_ALLOCATION_TYPE = -1
1477 };
1478
1479 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1480 BAD_ALLOCATION_TYPE, // 0
1481 BAD_ALLOCATION_TYPE, // 1
1482 BAD_ALLOCATION_TYPE, // 2
1483 BAD_ALLOCATION_TYPE, // 3
1484 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1485 NONSTATIC_SHORT, // T_CHAR = 5,
1486 NONSTATIC_WORD, // T_FLOAT = 6,
1487 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1488 NONSTATIC_BYTE, // T_BYTE = 8,
1489 NONSTATIC_SHORT, // T_SHORT = 9,
1490 NONSTATIC_WORD, // T_INT = 10,
1491 NONSTATIC_DOUBLE, // T_LONG = 11,
1492 NONSTATIC_OOP, // T_OBJECT = 12,
1493 NONSTATIC_OOP, // T_ARRAY = 13,
1494 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1495 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1496 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1497 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1498 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1499 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1500 BAD_ALLOCATION_TYPE, // 0
1501 BAD_ALLOCATION_TYPE, // 1
1502 BAD_ALLOCATION_TYPE, // 2
1503 BAD_ALLOCATION_TYPE, // 3
1504 STATIC_BYTE , // T_BOOLEAN = 4,
1505 STATIC_SHORT, // T_CHAR = 5,
1506 STATIC_WORD, // T_FLOAT = 6,
1507 STATIC_DOUBLE, // T_DOUBLE = 7,
1508 STATIC_BYTE, // T_BYTE = 8,
1509 STATIC_SHORT, // T_SHORT = 9,
1510 STATIC_WORD, // T_INT = 10,
1511 STATIC_DOUBLE, // T_LONG = 11,
1512 STATIC_OOP, // T_OBJECT = 12,
1513 STATIC_OOP, // T_ARRAY = 13,
1514 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1515 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1516 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1517 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1518 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1519 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1520 };
1521
1522 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1523 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1524 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1525 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1526 return result;
1527 }
1528
1529 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1530 public:
1531 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1532
1533 FieldAllocationCount() {
1534 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1535 count[i] = 0;
1536 }
1537 }
1538
1539 FieldAllocationType update(bool is_static, BasicType type) {
1540 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1541 if (atype != BAD_ALLOCATION_TYPE) {
1542 // Make sure there is no overflow with injected fields.
1543 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1544 count[atype]++;
1545 }
1546 return atype;
1547 }
1548 };
1549
1550 // Side-effects: populates the _fields, _fields_annotations,
1551 // _fields_type_annotations fields
1552 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1553 bool is_interface,
1554 FieldAllocationCount* const fac,
1555 ConstantPool* cp,
1556 const int cp_size,
1557 u2* const java_fields_count_ptr,
1558 TRAPS) {
1559
1560 assert(cfs != NULL, "invariant");
1561 assert(fac != NULL, "invariant");
1562 assert(cp != NULL, "invariant");
1563 assert(java_fields_count_ptr != NULL, "invariant");
1564
1565 assert(NULL == _fields, "invariant");
1566 assert(NULL == _fields_annotations, "invariant");
1567 assert(NULL == _fields_type_annotations, "invariant");
1568
1569 cfs->guarantee_more(2, CHECK); // length
1570 const u2 length = cfs->get_u2_fast();
1571 *java_fields_count_ptr = length;
1572
1573 int num_injected = 0;
1574 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1575 &num_injected);
1576 const int total_fields = length + num_injected;
1577
1578 // The field array starts with tuples of shorts
1579 // [access, name index, sig index, initial value index, byte offset].
1580 // A generic signature slot only exists for field with generic
1581 // signature attribute. And the access flag is set with
1582 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1583 // signature slots are at the end of the field array and after all
1584 // other fields data.
1585 //
1586 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1587 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1588 // ...
1589 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1590 // [generic signature index]
1591 // [generic signature index]
1592 // ...
1593 //
1594 // Allocate a temporary resource array for field data. For each field,
1595 // a slot is reserved in the temporary array for the generic signature
1596 // index. After parsing all fields, the data are copied to a permanent
1597 // array and any unused slots will be discarded.
1598 ResourceMark rm(THREAD);
1599 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1600 u2,
1601 total_fields * (FieldInfo::field_slots + 1));
1602
1603 // The generic signature slots start after all other fields' data.
1604 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1605 int num_generic_signature = 0;
1606 for (int n = 0; n < length; n++) {
1607 // access_flags, name_index, descriptor_index, attributes_count
1608 cfs->guarantee_more(8, CHECK);
1609
1610 AccessFlags access_flags;
1611 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1612 verify_legal_field_modifiers(flags, is_interface, CHECK);
1613 access_flags.set_flags(flags);
1614
1615 const u2 name_index = cfs->get_u2_fast();
1616 check_property(valid_symbol_at(name_index),
1617 "Invalid constant pool index %u for field name in class file %s",
1618 name_index, CHECK);
1619 const Symbol* const name = cp->symbol_at(name_index);
1620 verify_legal_field_name(name, CHECK);
1621
1622 const u2 signature_index = cfs->get_u2_fast();
1623 check_property(valid_symbol_at(signature_index),
1624 "Invalid constant pool index %u for field signature in class file %s",
1625 signature_index, CHECK);
1626 const Symbol* const sig = cp->symbol_at(signature_index);
1627 verify_legal_field_signature(name, sig, CHECK);
1628
1629 u2 constantvalue_index = 0;
1630 bool is_synthetic = false;
1631 u2 generic_signature_index = 0;
1632 const bool is_static = access_flags.is_static();
1633 FieldAnnotationCollector parsed_annotations(_loader_data);
1634
1635 const u2 attributes_count = cfs->get_u2_fast();
1636 if (attributes_count > 0) {
1637 parse_field_attributes(cfs,
1638 attributes_count,
1639 is_static,
1640 signature_index,
1641 &constantvalue_index,
1642 &is_synthetic,
1643 &generic_signature_index,
1644 &parsed_annotations,
1645 CHECK);
1646
1647 if (parsed_annotations.field_annotations() != NULL) {
1648 if (_fields_annotations == NULL) {
1649 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1650 _loader_data, length, NULL,
1651 CHECK);
1652 }
1653 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1654 parsed_annotations.set_field_annotations(NULL);
1655 }
1656 if (parsed_annotations.field_type_annotations() != NULL) {
1657 if (_fields_type_annotations == NULL) {
1658 _fields_type_annotations =
1659 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1660 length,
1661 NULL,
1662 CHECK);
1663 }
1664 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1665 parsed_annotations.set_field_type_annotations(NULL);
1666 }
1667
1668 if (is_synthetic) {
1669 access_flags.set_is_synthetic();
1670 }
1671 if (generic_signature_index != 0) {
1672 access_flags.set_field_has_generic_signature();
1673 fa[generic_signature_slot] = generic_signature_index;
1674 generic_signature_slot ++;
1675 num_generic_signature ++;
1676 }
1677 }
1678
1679 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1680 field->initialize(access_flags.as_short(),
1681 name_index,
1682 signature_index,
1683 constantvalue_index);
1684 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1685
1686 // Remember how many oops we encountered and compute allocation type
1687 const FieldAllocationType atype = fac->update(is_static, type);
1688 field->set_allocation_type(atype);
1689
1690 // After field is initialized with type, we can augment it with aux info
1691 if (parsed_annotations.has_any_annotations())
1692 parsed_annotations.apply_to(field);
1693 }
1694
1695 int index = length;
1696 if (num_injected != 0) {
1697 for (int n = 0; n < num_injected; n++) {
1698 // Check for duplicates
1699 if (injected[n].may_be_java) {
1700 const Symbol* const name = injected[n].name();
1701 const Symbol* const signature = injected[n].signature();
1702 bool duplicate = false;
1703 for (int i = 0; i < length; i++) {
1704 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1705 if (name == cp->symbol_at(f->name_index()) &&
1706 signature == cp->symbol_at(f->signature_index())) {
1707 // Symbol is desclared in Java so skip this one
1708 duplicate = true;
1709 break;
1710 }
1711 }
1712 if (duplicate) {
1713 // These will be removed from the field array at the end
1714 continue;
1715 }
1716 }
1717
1718 // Injected field
1719 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1720 field->initialize(JVM_ACC_FIELD_INTERNAL,
1721 injected[n].name_index,
1722 injected[n].signature_index,
1723 0);
1724
1725 const BasicType type = FieldType::basic_type(injected[n].signature());
1726
1727 // Remember how many oops we encountered and compute allocation type
1728 const FieldAllocationType atype = fac->update(false, type);
1729 field->set_allocation_type(atype);
1730 index++;
1731 }
1732 }
1733
1734 assert(NULL == _fields, "invariant");
1735
1736 _fields =
1737 MetadataFactory::new_array<u2>(_loader_data,
1738 index * FieldInfo::field_slots + num_generic_signature,
1739 CHECK);
1740 // Sometimes injected fields already exist in the Java source so
1741 // the fields array could be too long. In that case the
1742 // fields array is trimed. Also unused slots that were reserved
1743 // for generic signature indexes are discarded.
1744 {
1745 int i = 0;
1746 for (; i < index * FieldInfo::field_slots; i++) {
1747 _fields->at_put(i, fa[i]);
1748 }
1749 for (int j = total_fields * FieldInfo::field_slots;
1750 j < generic_signature_slot; j++) {
1751 _fields->at_put(i++, fa[j]);
1752 }
1753 assert(_fields->length() == i, "");
1754 }
1755
1756 if (_need_verify && length > 1) {
1757 // Check duplicated fields
1758 ResourceMark rm(THREAD);
1759 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1760 THREAD, NameSigHash*, HASH_ROW_SIZE);
1761 initialize_hashtable(names_and_sigs);
1762 bool dup = false;
1763 const Symbol* name = NULL;
1764 const Symbol* sig = NULL;
1765 {
1766 debug_only(NoSafepointVerifier nsv;)
1767 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1768 name = fs.name();
1769 sig = fs.signature();
1770 // If no duplicates, add name/signature in hashtable names_and_sigs.
1771 if (!put_after_lookup(name, sig, names_and_sigs)) {
1772 dup = true;
1773 break;
1774 }
1775 }
1776 }
1777 if (dup) {
1778 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1779 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1780 }
1781 }
1782 }
1783
1784
1785 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1786 u4 code_length,
1787 u4 exception_table_length,
1788 TRAPS) {
1789 assert(cfs != NULL, "invariant");
1790
1791 const unsafe_u2* const exception_table_start = cfs->current();
1792 assert(exception_table_start != NULL, "null exception table");
1793
1794 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1795 // end_pc,
1796 // handler_pc,
1797 // catch_type_index
1798
1799 // Will check legal target after parsing code array in verifier.
1800 if (_need_verify) {
1801 for (unsigned int i = 0; i < exception_table_length; i++) {
1802 const u2 start_pc = cfs->get_u2_fast();
1803 const u2 end_pc = cfs->get_u2_fast();
1804 const u2 handler_pc = cfs->get_u2_fast();
1805 const u2 catch_type_index = cfs->get_u2_fast();
1806 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1807 "Illegal exception table range in class file %s",
1808 CHECK_NULL);
1809 guarantee_property(handler_pc < code_length,
1810 "Illegal exception table handler in class file %s",
1811 CHECK_NULL);
1812 if (catch_type_index != 0) {
1813 guarantee_property(valid_klass_reference_at(catch_type_index),
1814 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1815 }
1816 }
1817 } else {
1818 cfs->skip_u2_fast(exception_table_length * 4);
1819 }
1820 return exception_table_start;
1821 }
1822
1823 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1824 u4 code_length,
1825 CompressedLineNumberWriteStream**const write_stream,
1826 TRAPS) {
1827
1828 const ClassFileStream* const cfs = _stream;
1829 unsigned int num_entries = cfs->get_u2(CHECK);
1830
1831 // Each entry is a u2 start_pc, and a u2 line_number
1832 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1833
1834 // Verify line number attribute and table length
1835 check_property(
1836 code_attribute_length == sizeof(u2) + length_in_bytes,
1837 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1838
1839 cfs->guarantee_more(length_in_bytes, CHECK);
1840
1841 if ((*write_stream) == NULL) {
1842 if (length_in_bytes > fixed_buffer_size) {
1843 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1844 } else {
1845 (*write_stream) = new CompressedLineNumberWriteStream(
1846 _linenumbertable_buffer, fixed_buffer_size);
1847 }
1848 }
1849
1850 while (num_entries-- > 0) {
1851 const u2 bci = cfs->get_u2_fast(); // start_pc
1852 const u2 line = cfs->get_u2_fast(); // line_number
1853 guarantee_property(bci < code_length,
1854 "Invalid pc in LineNumberTable in class file %s", CHECK);
1855 (*write_stream)->write_pair(bci, line);
1856 }
1857 }
1858
1859
1860 class LVT_Hash : public AllStatic {
1861 public:
1862
1863 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1864 /*
1865 * 3-tuple start_bci/length/slot has to be unique key,
1866 * so the following comparison seems to be redundant:
1867 * && elem->name_cp_index == entry->_elem->name_cp_index
1868 */
1869 return (e0.start_bci == e1.start_bci &&
1870 e0.length == e1.length &&
1871 e0.name_cp_index == e1.name_cp_index &&
1872 e0.slot == e1.slot);
1873 }
1874
1875 static unsigned int hash(LocalVariableTableElement const& e0) {
1876 unsigned int raw_hash = e0.start_bci;
1877
1878 raw_hash = e0.length + raw_hash * 37;
1879 raw_hash = e0.name_cp_index + raw_hash * 37;
1880 raw_hash = e0.slot + raw_hash * 37;
1881
1882 return raw_hash;
1883 }
1884 };
1885
1886
1887 // Class file LocalVariableTable elements.
1888 class Classfile_LVT_Element {
1889 public:
1890 u2 start_bci;
1891 u2 length;
1892 u2 name_cp_index;
1893 u2 descriptor_cp_index;
1894 u2 slot;
1895 };
1896
1897 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1898 LocalVariableTableElement* const lvt) {
1899 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1900 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1901 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1902 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1903 lvt->signature_cp_index = 0;
1904 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1905 }
1906
1907 // Function is used to parse both attributes:
1908 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1909 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1910 u4 code_length,
1911 u2 max_locals,
1912 u4 code_attribute_length,
1913 u2* const localvariable_table_length,
1914 bool isLVTT,
1915 TRAPS) {
1916 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1917 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1918 const unsigned int size =
1919 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1920
1921 const ConstantPool* const cp = _cp;
1922
1923 // Verify local variable table attribute has right length
1924 if (_need_verify) {
1925 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1926 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1927 }
1928
1929 const unsafe_u2* const localvariable_table_start = cfs->current();
1930 assert(localvariable_table_start != NULL, "null local variable table");
1931 if (!_need_verify) {
1932 cfs->skip_u2_fast(size);
1933 } else {
1934 cfs->guarantee_more(size * 2, CHECK_NULL);
1935 for(int i = 0; i < (*localvariable_table_length); i++) {
1936 const u2 start_pc = cfs->get_u2_fast();
1937 const u2 length = cfs->get_u2_fast();
1938 const u2 name_index = cfs->get_u2_fast();
1939 const u2 descriptor_index = cfs->get_u2_fast();
1940 const u2 index = cfs->get_u2_fast();
1941 // Assign to a u4 to avoid overflow
1942 const u4 end_pc = (u4)start_pc + (u4)length;
1943
1944 if (start_pc >= code_length) {
1945 classfile_parse_error(
1946 "Invalid start_pc %u in %s in class file %s",
1947 start_pc, tbl_name, CHECK_NULL);
1948 }
1949 if (end_pc > code_length) {
1950 classfile_parse_error(
1951 "Invalid length %u in %s in class file %s",
1952 length, tbl_name, CHECK_NULL);
1953 }
1954 const int cp_size = cp->length();
1955 guarantee_property(valid_symbol_at(name_index),
1956 "Name index %u in %s has bad constant type in class file %s",
1957 name_index, tbl_name, CHECK_NULL);
1958 guarantee_property(valid_symbol_at(descriptor_index),
1959 "Signature index %u in %s has bad constant type in class file %s",
1960 descriptor_index, tbl_name, CHECK_NULL);
1961
1962 const Symbol* const name = cp->symbol_at(name_index);
1963 const Symbol* const sig = cp->symbol_at(descriptor_index);
1964 verify_legal_field_name(name, CHECK_NULL);
1965 u2 extra_slot = 0;
1966 if (!isLVTT) {
1967 verify_legal_field_signature(name, sig, CHECK_NULL);
1968
1969 // 4894874: check special cases for double and long local variables
1970 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1971 sig == vmSymbols::type_signature(T_LONG)) {
1972 extra_slot = 1;
1973 }
1974 }
1975 guarantee_property((index + extra_slot) < max_locals,
1976 "Invalid index %u in %s in class file %s",
1977 index, tbl_name, CHECK_NULL);
1978 }
1979 }
1980 return localvariable_table_start;
1981 }
1982
1983 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1984 u4 code_attribute_length,
1985 bool need_verify,
1986 TRAPS) {
1987 assert(cfs != NULL, "invariant");
1988
1989 if (0 == code_attribute_length) {
1990 return NULL;
1991 }
1992
1993 const u1* const stackmap_table_start = cfs->current();
1994 assert(stackmap_table_start != NULL, "null stackmap table");
1995
1996 // check code_attribute_length first
1997 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1998
1999 if (!need_verify && !DumpSharedSpaces) {
2000 return NULL;
2001 }
2002 return stackmap_table_start;
2003 }
2004
2005 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2006 u2* const checked_exceptions_length,
2007 u4 method_attribute_length,
2008 TRAPS) {
2009 assert(cfs != NULL, "invariant");
2010 assert(checked_exceptions_length != NULL, "invariant");
2011
2012 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2013 *checked_exceptions_length = cfs->get_u2_fast();
2014 const unsigned int size =
2015 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2016 const unsafe_u2* const checked_exceptions_start = cfs->current();
2017 assert(checked_exceptions_start != NULL, "null checked exceptions");
2018 if (!_need_verify) {
2019 cfs->skip_u2_fast(size);
2020 } else {
2021 // Verify each value in the checked exception table
2022 u2 checked_exception;
2023 const u2 len = *checked_exceptions_length;
2024 cfs->guarantee_more(2 * len, CHECK_NULL);
2025 for (int i = 0; i < len; i++) {
2026 checked_exception = cfs->get_u2_fast();
2027 check_property(
2028 valid_klass_reference_at(checked_exception),
2029 "Exception name has bad type at constant pool %u in class file %s",
2030 checked_exception, CHECK_NULL);
2031 }
2032 }
2033 // check exceptions attribute length
2034 if (_need_verify) {
2035 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2036 sizeof(u2) * size),
2037 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2038 }
2039 return checked_exceptions_start;
2040 }
2041
2042 void ClassFileParser::throwIllegalSignature(const char* type,
2043 const Symbol* name,
2044 const Symbol* sig,
2045 TRAPS) const {
2046 assert(name != NULL, "invariant");
2047 assert(sig != NULL, "invariant");
2048
2049 ResourceMark rm(THREAD);
2050 Exceptions::fthrow(THREAD_AND_LOCATION,
2051 vmSymbols::java_lang_ClassFormatError(),
2052 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2053 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2054 }
2055
2056 AnnotationCollector::ID
2057 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2058 const Symbol* name) {
2059 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2060 // Privileged code can use all annotations. Other code silently drops some.
2061 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2062 loader_data->is_platform_class_loader_data() ||
2063 loader_data->is_unsafe_anonymous();
2064 switch (sid) {
2065 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2066 if (_location != _in_method) break; // only allow for methods
2067 if (!privileged) break; // only allow in privileged code
2068 return _method_CallerSensitive;
2069 }
2070 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2071 if (_location != _in_method) break; // only allow for methods
2072 if (!privileged) break; // only allow in privileged code
2073 return _method_ForceInline;
2074 }
2075 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2076 if (_location != _in_method) break; // only allow for methods
2077 if (!privileged) break; // only allow in privileged code
2078 return _method_DontInline;
2079 }
2080 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2081 if (_location != _in_method) break; // only allow for methods
2082 if (!privileged) break; // only allow in privileged code
2083 return _method_InjectedProfile;
2084 }
2085 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2086 if (_location != _in_method) break; // only allow for methods
2087 if (!privileged) break; // only allow in privileged code
2088 return _method_LambdaForm_Compiled;
2089 }
2090 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2091 if (_location != _in_method) break; // only allow for methods
2092 if (!privileged) break; // only allow in privileged code
2093 return _method_Hidden;
2094 }
2095 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2096 if (_location != _in_method) break; // only allow for methods
2097 if (!privileged) break; // only allow in privileged code
2098 return _method_HotSpotIntrinsicCandidate;
2099 }
2100 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2101 if (_location != _in_field) break; // only allow for fields
2102 if (!privileged) break; // only allow in privileged code
2103 return _field_Stable;
2104 }
2105 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2106 if (_location != _in_field && _location != _in_class) {
2107 break; // only allow for fields and classes
2108 }
2109 if (!EnableContended || (RestrictContended && !privileged)) {
2110 break; // honor privileges
2111 }
2112 return _jdk_internal_vm_annotation_Contended;
2113 }
2114 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2115 if (_location != _in_method) break; // only allow for methods
2116 if (RestrictReservedStack && !privileged) break; // honor privileges
2117 return _jdk_internal_vm_annotation_ReservedStackAccess;
2118 }
2119 default: {
2120 break;
2121 }
2122 }
2123 return AnnotationCollector::_unknown;
2124 }
2125
2126 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2127 if (is_contended())
2128 f->set_contended_group(contended_group());
2129 if (is_stable())
2130 f->set_stable(true);
2131 }
2132
2133 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2134 // If there's an error deallocate metadata for field annotations
2135 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2136 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2137 }
2138
2139 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2140 if (has_annotation(_method_CallerSensitive))
2141 m->set_caller_sensitive(true);
2142 if (has_annotation(_method_ForceInline))
2143 m->set_force_inline(true);
2144 if (has_annotation(_method_DontInline))
2145 m->set_dont_inline(true);
2146 if (has_annotation(_method_InjectedProfile))
2147 m->set_has_injected_profile(true);
2148 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2149 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2150 if (has_annotation(_method_Hidden))
2151 m->set_hidden(true);
2152 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2153 m->set_intrinsic_candidate(true);
2154 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2155 m->set_has_reserved_stack_access(true);
2156 }
2157
2158 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2159 assert(ik != NULL, "invariant");
2160 ik->set_is_contended(is_contended());
2161 }
2162
2163 #define MAX_ARGS_SIZE 255
2164 #define MAX_CODE_SIZE 65535
2165 #define INITIAL_MAX_LVT_NUMBER 256
2166
2167 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2168 *
2169 * Rules for LVT's and LVTT's are:
2170 * - There can be any number of LVT's and LVTT's.
2171 * - If there are n LVT's, it is the same as if there was just
2172 * one LVT containing all the entries from the n LVT's.
2173 * - There may be no more than one LVT entry per local variable.
2174 * Two LVT entries are 'equal' if these fields are the same:
2175 * start_pc, length, name, slot
2176 * - There may be no more than one LVTT entry per each LVT entry.
2177 * Each LVTT entry has to match some LVT entry.
2178 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2179 */
2180 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2181 int lvt_cnt,
2182 u2* const localvariable_table_length,
2183 const unsafe_u2** const localvariable_table_start,
2184 int lvtt_cnt,
2185 u2* const localvariable_type_table_length,
2186 const unsafe_u2** const localvariable_type_table_start,
2187 TRAPS) {
2188
2189 ResourceMark rm(THREAD);
2190
2191 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2192 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2193
2194 LVT_HashTable* const table = new LVT_HashTable();
2195
2196 // To fill LocalVariableTable in
2197 const Classfile_LVT_Element* cf_lvt;
2198 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2199
2200 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2201 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2202 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2203 copy_lvt_element(&cf_lvt[idx], lvt);
2204 // If no duplicates, add LVT elem in hashtable.
2205 if (table->put(*lvt, lvt) == false
2206 && _need_verify
2207 && _major_version >= JAVA_1_5_VERSION) {
2208 classfile_parse_error("Duplicated LocalVariableTable attribute "
2209 "entry for '%s' in class file %s",
2210 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2211 CHECK);
2212 }
2213 }
2214 }
2215
2216 // To merge LocalVariableTable and LocalVariableTypeTable
2217 const Classfile_LVT_Element* cf_lvtt;
2218 LocalVariableTableElement lvtt_elem;
2219
2220 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2221 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2222 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2223 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2224 LocalVariableTableElement** entry = table->get(lvtt_elem);
2225 if (entry == NULL) {
2226 if (_need_verify) {
2227 classfile_parse_error("LVTT entry for '%s' in class file %s "
2228 "does not match any LVT entry",
2229 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2230 CHECK);
2231 }
2232 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2233 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2234 "entry for '%s' in class file %s",
2235 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2236 CHECK);
2237 } else {
2238 // to add generic signatures into LocalVariableTable
2239 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2240 }
2241 }
2242 }
2243 }
2244
2245
2246 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2247 const u1* runtime_visible_annotations,
2248 int runtime_visible_annotations_length,
2249 const u1* runtime_invisible_annotations,
2250 int runtime_invisible_annotations_length,
2251 const u1* runtime_visible_parameter_annotations,
2252 int runtime_visible_parameter_annotations_length,
2253 const u1* runtime_invisible_parameter_annotations,
2254 int runtime_invisible_parameter_annotations_length,
2255 const u1* runtime_visible_type_annotations,
2256 int runtime_visible_type_annotations_length,
2257 const u1* runtime_invisible_type_annotations,
2258 int runtime_invisible_type_annotations_length,
2259 const u1* annotation_default,
2260 int annotation_default_length,
2261 TRAPS) {
2262
2263 AnnotationArray* a;
2264
2265 if (runtime_visible_annotations_length +
2266 runtime_invisible_annotations_length > 0) {
2267 a = assemble_annotations(runtime_visible_annotations,
2268 runtime_visible_annotations_length,
2269 runtime_invisible_annotations,
2270 runtime_invisible_annotations_length,
2271 CHECK);
2272 cm->set_method_annotations(a);
2273 }
2274
2275 if (runtime_visible_parameter_annotations_length +
2276 runtime_invisible_parameter_annotations_length > 0) {
2277 a = assemble_annotations(runtime_visible_parameter_annotations,
2278 runtime_visible_parameter_annotations_length,
2279 runtime_invisible_parameter_annotations,
2280 runtime_invisible_parameter_annotations_length,
2281 CHECK);
2282 cm->set_parameter_annotations(a);
2283 }
2284
2285 if (annotation_default_length > 0) {
2286 a = assemble_annotations(annotation_default,
2287 annotation_default_length,
2288 NULL,
2289 0,
2290 CHECK);
2291 cm->set_default_annotations(a);
2292 }
2293
2294 if (runtime_visible_type_annotations_length +
2295 runtime_invisible_type_annotations_length > 0) {
2296 a = assemble_annotations(runtime_visible_type_annotations,
2297 runtime_visible_type_annotations_length,
2298 runtime_invisible_type_annotations,
2299 runtime_invisible_type_annotations_length,
2300 CHECK);
2301 cm->set_type_annotations(a);
2302 }
2303 }
2304
2305
2306 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2307 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2308 // Method* to save footprint, so we only know the size of the resulting Method* when the
2309 // entire method attribute is parsed.
2310 //
2311 // The promoted_flags parameter is used to pass relevant access_flags
2312 // from the method back up to the containing klass. These flag values
2313 // are added to klass's access_flags.
2314
2315 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2316 bool is_interface,
2317 const ConstantPool* cp,
2318 AccessFlags* const promoted_flags,
2319 TRAPS) {
2320 assert(cfs != NULL, "invariant");
2321 assert(cp != NULL, "invariant");
2322 assert(promoted_flags != NULL, "invariant");
2323
2324 ResourceMark rm(THREAD);
2325 // Parse fixed parts:
2326 // access_flags, name_index, descriptor_index, attributes_count
2327 cfs->guarantee_more(8, CHECK_NULL);
2328
2329 int flags = cfs->get_u2_fast();
2330 const u2 name_index = cfs->get_u2_fast();
2331 const int cp_size = cp->length();
2332 check_property(
2333 valid_symbol_at(name_index),
2334 "Illegal constant pool index %u for method name in class file %s",
2335 name_index, CHECK_NULL);
2336 const Symbol* const name = cp->symbol_at(name_index);
2337 verify_legal_method_name(name, CHECK_NULL);
2338
2339 const u2 signature_index = cfs->get_u2_fast();
2340 guarantee_property(
2341 valid_symbol_at(signature_index),
2342 "Illegal constant pool index %u for method signature in class file %s",
2343 signature_index, CHECK_NULL);
2344 const Symbol* const signature = cp->symbol_at(signature_index);
2345
2346 if (name == vmSymbols::class_initializer_name()) {
2347 // We ignore the other access flags for a valid class initializer.
2348 // (JVM Spec 2nd ed., chapter 4.6)
2349 if (_major_version < 51) { // backward compatibility
2350 flags = JVM_ACC_STATIC;
2351 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2352 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2353 } else {
2354 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2355 }
2356 } else {
2357 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2358 }
2359
2360 if (name == vmSymbols::object_initializer_name() && is_interface) {
2361 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2362 }
2363
2364 int args_size = -1; // only used when _need_verify is true
2365 if (_need_verify) {
2366 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2367 verify_legal_method_signature(name, signature, CHECK_NULL);
2368 if (args_size > MAX_ARGS_SIZE) {
2369 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2370 }
2371 }
2372
2373 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2374
2375 // Default values for code and exceptions attribute elements
2376 u2 max_stack = 0;
2377 u2 max_locals = 0;
2378 u4 code_length = 0;
2379 const u1* code_start = 0;
2380 u2 exception_table_length = 0;
2381 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2382 Array<int>* exception_handlers = Universe::the_empty_int_array();
2383 u2 checked_exceptions_length = 0;
2384 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2385 CompressedLineNumberWriteStream* linenumber_table = NULL;
2386 int linenumber_table_length = 0;
2387 int total_lvt_length = 0;
2388 u2 lvt_cnt = 0;
2389 u2 lvtt_cnt = 0;
2390 bool lvt_allocated = false;
2391 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2392 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2393 u2* localvariable_table_length = NULL;
2394 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2395 u2* localvariable_type_table_length = NULL;
2396 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2397 int method_parameters_length = -1;
2398 const u1* method_parameters_data = NULL;
2399 bool method_parameters_seen = false;
2400 bool parsed_code_attribute = false;
2401 bool parsed_checked_exceptions_attribute = false;
2402 bool parsed_stackmap_attribute = false;
2403 // stackmap attribute - JDK1.5
2404 const u1* stackmap_data = NULL;
2405 int stackmap_data_length = 0;
2406 u2 generic_signature_index = 0;
2407 MethodAnnotationCollector parsed_annotations;
2408 const u1* runtime_visible_annotations = NULL;
2409 int runtime_visible_annotations_length = 0;
2410 const u1* runtime_invisible_annotations = NULL;
2411 int runtime_invisible_annotations_length = 0;
2412 const u1* runtime_visible_parameter_annotations = NULL;
2413 int runtime_visible_parameter_annotations_length = 0;
2414 const u1* runtime_invisible_parameter_annotations = NULL;
2415 int runtime_invisible_parameter_annotations_length = 0;
2416 const u1* runtime_visible_type_annotations = NULL;
2417 int runtime_visible_type_annotations_length = 0;
2418 const u1* runtime_invisible_type_annotations = NULL;
2419 int runtime_invisible_type_annotations_length = 0;
2420 bool runtime_invisible_annotations_exists = false;
2421 bool runtime_invisible_type_annotations_exists = false;
2422 bool runtime_invisible_parameter_annotations_exists = false;
2423 const u1* annotation_default = NULL;
2424 int annotation_default_length = 0;
2425
2426 // Parse code and exceptions attribute
2427 u2 method_attributes_count = cfs->get_u2_fast();
2428 while (method_attributes_count--) {
2429 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2430 const u2 method_attribute_name_index = cfs->get_u2_fast();
2431 const u4 method_attribute_length = cfs->get_u4_fast();
2432 check_property(
2433 valid_symbol_at(method_attribute_name_index),
2434 "Invalid method attribute name index %u in class file %s",
2435 method_attribute_name_index, CHECK_NULL);
2436
2437 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2438 if (method_attribute_name == vmSymbols::tag_code()) {
2439 // Parse Code attribute
2440 if (_need_verify) {
2441 guarantee_property(
2442 !access_flags.is_native() && !access_flags.is_abstract(),
2443 "Code attribute in native or abstract methods in class file %s",
2444 CHECK_NULL);
2445 }
2446 if (parsed_code_attribute) {
2447 classfile_parse_error("Multiple Code attributes in class file %s",
2448 CHECK_NULL);
2449 }
2450 parsed_code_attribute = true;
2451
2452 // Stack size, locals size, and code size
2453 cfs->guarantee_more(8, CHECK_NULL);
2454 max_stack = cfs->get_u2_fast();
2455 max_locals = cfs->get_u2_fast();
2456 code_length = cfs->get_u4_fast();
2457 if (_need_verify) {
2458 guarantee_property(args_size <= max_locals,
2459 "Arguments can't fit into locals in class file %s",
2460 CHECK_NULL);
2461 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2462 "Invalid method Code length %u in class file %s",
2463 code_length, CHECK_NULL);
2464 }
2465 // Code pointer
2466 code_start = cfs->current();
2467 assert(code_start != NULL, "null code start");
2468 cfs->guarantee_more(code_length, CHECK_NULL);
2469 cfs->skip_u1_fast(code_length);
2470
2471 // Exception handler table
2472 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2473 exception_table_length = cfs->get_u2_fast();
2474 if (exception_table_length > 0) {
2475 exception_table_start = parse_exception_table(cfs,
2476 code_length,
2477 exception_table_length,
2478 CHECK_NULL);
2479 }
2480
2481 // Parse additional attributes in code attribute
2482 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2483 u2 code_attributes_count = cfs->get_u2_fast();
2484
2485 unsigned int calculated_attribute_length = 0;
2486
2487 calculated_attribute_length =
2488 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2489 calculated_attribute_length +=
2490 code_length +
2491 sizeof(exception_table_length) +
2492 sizeof(code_attributes_count) +
2493 exception_table_length *
2494 ( sizeof(u2) + // start_pc
2495 sizeof(u2) + // end_pc
2496 sizeof(u2) + // handler_pc
2497 sizeof(u2) ); // catch_type_index
2498
2499 while (code_attributes_count--) {
2500 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2501 const u2 code_attribute_name_index = cfs->get_u2_fast();
2502 const u4 code_attribute_length = cfs->get_u4_fast();
2503 calculated_attribute_length += code_attribute_length +
2504 sizeof(code_attribute_name_index) +
2505 sizeof(code_attribute_length);
2506 check_property(valid_symbol_at(code_attribute_name_index),
2507 "Invalid code attribute name index %u in class file %s",
2508 code_attribute_name_index,
2509 CHECK_NULL);
2510 if (LoadLineNumberTables &&
2511 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2512 // Parse and compress line number table
2513 parse_linenumber_table(code_attribute_length,
2514 code_length,
2515 &linenumber_table,
2516 CHECK_NULL);
2517
2518 } else if (LoadLocalVariableTables &&
2519 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2520 // Parse local variable table
2521 if (!lvt_allocated) {
2522 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2523 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2524 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2525 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2526 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2527 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2528 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2529 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2530 lvt_allocated = true;
2531 }
2532 if (lvt_cnt == max_lvt_cnt) {
2533 max_lvt_cnt <<= 1;
2534 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2535 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2536 }
2537 localvariable_table_start[lvt_cnt] =
2538 parse_localvariable_table(cfs,
2539 code_length,
2540 max_locals,
2541 code_attribute_length,
2542 &localvariable_table_length[lvt_cnt],
2543 false, // is not LVTT
2544 CHECK_NULL);
2545 total_lvt_length += localvariable_table_length[lvt_cnt];
2546 lvt_cnt++;
2547 } else if (LoadLocalVariableTypeTables &&
2548 _major_version >= JAVA_1_5_VERSION &&
2549 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2550 if (!lvt_allocated) {
2551 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2552 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2553 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2554 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2555 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2556 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2557 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2558 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2559 lvt_allocated = true;
2560 }
2561 // Parse local variable type table
2562 if (lvtt_cnt == max_lvtt_cnt) {
2563 max_lvtt_cnt <<= 1;
2564 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2565 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2566 }
2567 localvariable_type_table_start[lvtt_cnt] =
2568 parse_localvariable_table(cfs,
2569 code_length,
2570 max_locals,
2571 code_attribute_length,
2572 &localvariable_type_table_length[lvtt_cnt],
2573 true, // is LVTT
2574 CHECK_NULL);
2575 lvtt_cnt++;
2576 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2577 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2578 // Stack map is only needed by the new verifier in JDK1.5.
2579 if (parsed_stackmap_attribute) {
2580 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2581 }
2582 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2583 stackmap_data_length = code_attribute_length;
2584 parsed_stackmap_attribute = true;
2585 } else {
2586 // Skip unknown attributes
2587 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2588 }
2589 }
2590 // check method attribute length
2591 if (_need_verify) {
2592 guarantee_property(method_attribute_length == calculated_attribute_length,
2593 "Code segment has wrong length in class file %s",
2594 CHECK_NULL);
2595 }
2596 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2597 // Parse Exceptions attribute
2598 if (parsed_checked_exceptions_attribute) {
2599 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2600 CHECK_NULL);
2601 }
2602 parsed_checked_exceptions_attribute = true;
2603 checked_exceptions_start =
2604 parse_checked_exceptions(cfs,
2605 &checked_exceptions_length,
2606 method_attribute_length,
2607 CHECK_NULL);
2608 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2609 // reject multiple method parameters
2610 if (method_parameters_seen) {
2611 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2612 CHECK_NULL);
2613 }
2614 method_parameters_seen = true;
2615 method_parameters_length = cfs->get_u1_fast();
2616 const u2 real_length = (method_parameters_length * 4u) + 1u;
2617 if (method_attribute_length != real_length) {
2618 classfile_parse_error(
2619 "Invalid MethodParameters method attribute length %u in class file",
2620 method_attribute_length, CHECK_NULL);
2621 }
2622 method_parameters_data = cfs->current();
2623 cfs->skip_u2_fast(method_parameters_length);
2624 cfs->skip_u2_fast(method_parameters_length);
2625 // ignore this attribute if it cannot be reflected
2626 if (!SystemDictionary::Parameter_klass_loaded())
2627 method_parameters_length = -1;
2628 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2629 if (method_attribute_length != 0) {
2630 classfile_parse_error(
2631 "Invalid Synthetic method attribute length %u in class file %s",
2632 method_attribute_length, CHECK_NULL);
2633 }
2634 // Should we check that there hasn't already been a synthetic attribute?
2635 access_flags.set_is_synthetic();
2636 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2637 if (method_attribute_length != 0) {
2638 classfile_parse_error(
2639 "Invalid Deprecated method attribute length %u in class file %s",
2640 method_attribute_length, CHECK_NULL);
2641 }
2642 } else if (_major_version >= JAVA_1_5_VERSION) {
2643 if (method_attribute_name == vmSymbols::tag_signature()) {
2644 if (generic_signature_index != 0) {
2645 classfile_parse_error(
2646 "Multiple Signature attributes for method in class file %s",
2647 CHECK_NULL);
2648 }
2649 if (method_attribute_length != 2) {
2650 classfile_parse_error(
2651 "Invalid Signature attribute length %u in class file %s",
2652 method_attribute_length, CHECK_NULL);
2653 }
2654 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2655 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2656 if (runtime_visible_annotations != NULL) {
2657 classfile_parse_error(
2658 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2659 CHECK_NULL);
2660 }
2661 runtime_visible_annotations_length = method_attribute_length;
2662 runtime_visible_annotations = cfs->current();
2663 assert(runtime_visible_annotations != NULL, "null visible annotations");
2664 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2665 parse_annotations(cp,
2666 runtime_visible_annotations,
2667 runtime_visible_annotations_length,
2668 &parsed_annotations,
2669 _loader_data,
2670 CHECK_NULL);
2671 cfs->skip_u1_fast(runtime_visible_annotations_length);
2672 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2673 if (runtime_invisible_annotations_exists) {
2674 classfile_parse_error(
2675 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2676 CHECK_NULL);
2677 }
2678 runtime_invisible_annotations_exists = true;
2679 if (PreserveAllAnnotations) {
2680 runtime_invisible_annotations_length = method_attribute_length;
2681 runtime_invisible_annotations = cfs->current();
2682 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2683 }
2684 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2685 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2686 if (runtime_visible_parameter_annotations != NULL) {
2687 classfile_parse_error(
2688 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2689 CHECK_NULL);
2690 }
2691 runtime_visible_parameter_annotations_length = method_attribute_length;
2692 runtime_visible_parameter_annotations = cfs->current();
2693 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2694 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2695 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2696 if (runtime_invisible_parameter_annotations_exists) {
2697 classfile_parse_error(
2698 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2699 CHECK_NULL);
2700 }
2701 runtime_invisible_parameter_annotations_exists = true;
2702 if (PreserveAllAnnotations) {
2703 runtime_invisible_parameter_annotations_length = method_attribute_length;
2704 runtime_invisible_parameter_annotations = cfs->current();
2705 assert(runtime_invisible_parameter_annotations != NULL,
2706 "null invisible parameter annotations");
2707 }
2708 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2709 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2710 if (annotation_default != NULL) {
2711 classfile_parse_error(
2712 "Multiple AnnotationDefault attributes for method in class file %s",
2713 CHECK_NULL);
2714 }
2715 annotation_default_length = method_attribute_length;
2716 annotation_default = cfs->current();
2717 assert(annotation_default != NULL, "null annotation default");
2718 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2719 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2720 if (runtime_visible_type_annotations != NULL) {
2721 classfile_parse_error(
2722 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2723 CHECK_NULL);
2724 }
2725 runtime_visible_type_annotations_length = method_attribute_length;
2726 runtime_visible_type_annotations = cfs->current();
2727 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2728 // No need for the VM to parse Type annotations
2729 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2730 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2731 if (runtime_invisible_type_annotations_exists) {
2732 classfile_parse_error(
2733 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2734 CHECK_NULL);
2735 } else {
2736 runtime_invisible_type_annotations_exists = true;
2737 }
2738 if (PreserveAllAnnotations) {
2739 runtime_invisible_type_annotations_length = method_attribute_length;
2740 runtime_invisible_type_annotations = cfs->current();
2741 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2742 }
2743 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2744 } else {
2745 // Skip unknown attributes
2746 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2747 }
2748 } else {
2749 // Skip unknown attributes
2750 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2751 }
2752 }
2753
2754 if (linenumber_table != NULL) {
2755 linenumber_table->write_terminator();
2756 linenumber_table_length = linenumber_table->position();
2757 }
2758
2759 // Make sure there's at least one Code attribute in non-native/non-abstract method
2760 if (_need_verify) {
2761 guarantee_property(access_flags.is_native() ||
2762 access_flags.is_abstract() ||
2763 parsed_code_attribute,
2764 "Absent Code attribute in method that is not native or abstract in class file %s",
2765 CHECK_NULL);
2766 }
2767
2768 // All sizing information for a Method* is finally available, now create it
2769 InlineTableSizes sizes(
2770 total_lvt_length,
2771 linenumber_table_length,
2772 exception_table_length,
2773 checked_exceptions_length,
2774 method_parameters_length,
2775 generic_signature_index,
2776 runtime_visible_annotations_length +
2777 runtime_invisible_annotations_length,
2778 runtime_visible_parameter_annotations_length +
2779 runtime_invisible_parameter_annotations_length,
2780 runtime_visible_type_annotations_length +
2781 runtime_invisible_type_annotations_length,
2782 annotation_default_length,
2783 0);
2784
2785 Method* const m = Method::allocate(_loader_data,
2786 code_length,
2787 access_flags,
2788 &sizes,
2789 ConstMethod::NORMAL,
2790 CHECK_NULL);
2791
2792 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2793
2794 // Fill in information from fixed part (access_flags already set)
2795 m->set_constants(_cp);
2796 m->set_name_index(name_index);
2797 m->set_signature_index(signature_index);
2798
2799 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2800 m->constMethod()->set_result_type(rtf.type());
2801
2802 if (args_size >= 0) {
2803 m->set_size_of_parameters(args_size);
2804 } else {
2805 m->compute_size_of_parameters(THREAD);
2806 }
2807 #ifdef ASSERT
2808 if (args_size >= 0) {
2809 m->compute_size_of_parameters(THREAD);
2810 assert(args_size == m->size_of_parameters(), "");
2811 }
2812 #endif
2813
2814 // Fill in code attribute information
2815 m->set_max_stack(max_stack);
2816 m->set_max_locals(max_locals);
2817 if (stackmap_data != NULL) {
2818 m->constMethod()->copy_stackmap_data(_loader_data,
2819 (u1*)stackmap_data,
2820 stackmap_data_length,
2821 CHECK_NULL);
2822 }
2823
2824 // Copy byte codes
2825 m->set_code((u1*)code_start);
2826
2827 // Copy line number table
2828 if (linenumber_table != NULL) {
2829 memcpy(m->compressed_linenumber_table(),
2830 linenumber_table->buffer(),
2831 linenumber_table_length);
2832 }
2833
2834 // Copy exception table
2835 if (exception_table_length > 0) {
2836 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2837 m->exception_table_start(),
2838 exception_table_length * sizeof(ExceptionTableElement),
2839 sizeof(u2));
2840 }
2841
2842 // Copy method parameters
2843 if (method_parameters_length > 0) {
2844 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2845 for (int i = 0; i < method_parameters_length; i++) {
2846 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2847 method_parameters_data += 2;
2848 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2849 method_parameters_data += 2;
2850 }
2851 }
2852
2853 // Copy checked exceptions
2854 if (checked_exceptions_length > 0) {
2855 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2856 m->checked_exceptions_start(),
2857 checked_exceptions_length * sizeof(CheckedExceptionElement),
2858 sizeof(u2));
2859 }
2860
2861 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2862 if (total_lvt_length > 0) {
2863 promoted_flags->set_has_localvariable_table();
2864 copy_localvariable_table(m->constMethod(),
2865 lvt_cnt,
2866 localvariable_table_length,
2867 localvariable_table_start,
2868 lvtt_cnt,
2869 localvariable_type_table_length,
2870 localvariable_type_table_start,
2871 CHECK_NULL);
2872 }
2873
2874 if (parsed_annotations.has_any_annotations())
2875 parsed_annotations.apply_to(methodHandle(THREAD, m));
2876
2877 // Copy annotations
2878 copy_method_annotations(m->constMethod(),
2879 runtime_visible_annotations,
2880 runtime_visible_annotations_length,
2881 runtime_invisible_annotations,
2882 runtime_invisible_annotations_length,
2883 runtime_visible_parameter_annotations,
2884 runtime_visible_parameter_annotations_length,
2885 runtime_invisible_parameter_annotations,
2886 runtime_invisible_parameter_annotations_length,
2887 runtime_visible_type_annotations,
2888 runtime_visible_type_annotations_length,
2889 runtime_invisible_type_annotations,
2890 runtime_invisible_type_annotations_length,
2891 annotation_default,
2892 annotation_default_length,
2893 CHECK_NULL);
2894
2895 if (name == vmSymbols::finalize_method_name() &&
2896 signature == vmSymbols::void_method_signature()) {
2897 if (m->is_empty_method()) {
2898 _has_empty_finalizer = true;
2899 } else {
2900 _has_finalizer = true;
2901 }
2902 }
2903 if (name == vmSymbols::object_initializer_name() &&
2904 signature == vmSymbols::void_method_signature() &&
2905 m->is_vanilla_constructor()) {
2906 _has_vanilla_constructor = true;
2907 }
2908
2909 NOT_PRODUCT(m->verify());
2910 return m;
2911 }
2912
2913
2914 // The promoted_flags parameter is used to pass relevant access_flags
2915 // from the methods back up to the containing klass. These flag values
2916 // are added to klass's access_flags.
2917 // Side-effects: populates the _methods field in the parser
2918 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2919 bool is_interface,
2920 AccessFlags* promoted_flags,
2921 bool* has_final_method,
2922 bool* declares_nonstatic_concrete_methods,
2923 TRAPS) {
2924 assert(cfs != NULL, "invariant");
2925 assert(promoted_flags != NULL, "invariant");
2926 assert(has_final_method != NULL, "invariant");
2927 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2928
2929 assert(NULL == _methods, "invariant");
2930
2931 cfs->guarantee_more(2, CHECK); // length
2932 const u2 length = cfs->get_u2_fast();
2933 if (length == 0) {
2934 _methods = Universe::the_empty_method_array();
2935 } else {
2936 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2937 length,
2938 NULL,
2939 CHECK);
2940
2941 for (int index = 0; index < length; index++) {
2942 Method* method = parse_method(cfs,
2943 is_interface,
2944 _cp,
2945 promoted_flags,
2946 CHECK);
2947
2948 if (method->is_final()) {
2949 *has_final_method = true;
2950 }
2951 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2952 // used for interface initialization, and default method inheritance analysis
2953 if (is_interface && !(*declares_nonstatic_concrete_methods)
2954 && !method->is_abstract() && !method->is_static()) {
2955 *declares_nonstatic_concrete_methods = true;
2956 }
2957 _methods->at_put(index, method);
2958 }
2959
2960 if (_need_verify && length > 1) {
2961 // Check duplicated methods
2962 ResourceMark rm(THREAD);
2963 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2964 THREAD, NameSigHash*, HASH_ROW_SIZE);
2965 initialize_hashtable(names_and_sigs);
2966 bool dup = false;
2967 const Symbol* name = NULL;
2968 const Symbol* sig = NULL;
2969 {
2970 debug_only(NoSafepointVerifier nsv;)
2971 for (int i = 0; i < length; i++) {
2972 const Method* const m = _methods->at(i);
2973 name = m->name();
2974 sig = m->signature();
2975 // If no duplicates, add name/signature in hashtable names_and_sigs.
2976 if (!put_after_lookup(name, sig, names_and_sigs)) {
2977 dup = true;
2978 break;
2979 }
2980 }
2981 }
2982 if (dup) {
2983 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2984 name->as_C_string(), sig->as_klass_external_name(), CHECK);
2985 }
2986 }
2987 }
2988 }
2989
2990 static const intArray* sort_methods(Array<Method*>* methods) {
2991 const int length = methods->length();
2992 // If JVMTI original method ordering or sharing is enabled we have to
2993 // remember the original class file ordering.
2994 // We temporarily use the vtable_index field in the Method* to store the
2995 // class file index, so we can read in after calling qsort.
2996 // Put the method ordering in the shared archive.
2997 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
2998 for (int index = 0; index < length; index++) {
2999 Method* const m = methods->at(index);
3000 assert(!m->valid_vtable_index(), "vtable index should not be set");
3001 m->set_vtable_index(index);
3002 }
3003 }
3004 // Sort method array by ascending method name (for faster lookups & vtable construction)
3005 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3006 Method::sort_methods(methods);
3007
3008 intArray* method_ordering = NULL;
3009 // If JVMTI original method ordering or sharing is enabled construct int
3010 // array remembering the original ordering
3011 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3012 method_ordering = new intArray(length, length, -1);
3013 for (int index = 0; index < length; index++) {
3014 Method* const m = methods->at(index);
3015 const int old_index = m->vtable_index();
3016 assert(old_index >= 0 && old_index < length, "invalid method index");
3017 method_ordering->at_put(index, old_index);
3018 m->set_vtable_index(Method::invalid_vtable_index);
3019 }
3020 }
3021 return method_ordering;
3022 }
3023
3024 // Parse generic_signature attribute for methods and fields
3025 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3026 TRAPS) {
3027 assert(cfs != NULL, "invariant");
3028
3029 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3030 const u2 generic_signature_index = cfs->get_u2_fast();
3031 check_property(
3032 valid_symbol_at(generic_signature_index),
3033 "Invalid Signature attribute at constant pool index %u in class file %s",
3034 generic_signature_index, CHECK_0);
3035 return generic_signature_index;
3036 }
3037
3038 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3039 TRAPS) {
3040
3041 assert(cfs != NULL, "invariant");
3042
3043 cfs->guarantee_more(2, CHECK); // sourcefile_index
3044 const u2 sourcefile_index = cfs->get_u2_fast();
3045 check_property(
3046 valid_symbol_at(sourcefile_index),
3047 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3048 sourcefile_index, CHECK);
3049 set_class_sourcefile_index(sourcefile_index);
3050 }
3051
3052 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3053 int length,
3054 TRAPS) {
3055 assert(cfs != NULL, "invariant");
3056
3057 const u1* const sde_buffer = cfs->current();
3058 assert(sde_buffer != NULL, "null sde buffer");
3059
3060 // Don't bother storing it if there is no way to retrieve it
3061 if (JvmtiExport::can_get_source_debug_extension()) {
3062 assert((length+1) > length, "Overflow checking");
3063 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3064 for (int i = 0; i < length; i++) {
3065 sde[i] = sde_buffer[i];
3066 }
3067 sde[length] = '\0';
3068 set_class_sde_buffer((const char*)sde, length);
3069 }
3070 // Got utf8 string, set stream position forward
3071 cfs->skip_u1(length, CHECK);
3072 }
3073
3074
3075 // Inner classes can be static, private or protected (classic VM does this)
3076 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3077 JVM_ACC_PRIVATE | \
3078 JVM_ACC_PROTECTED | \
3079 JVM_ACC_STATIC \
3080 )
3081
3082 // Return number of classes in the inner classes attribute table
3083 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3084 const u1* const inner_classes_attribute_start,
3085 bool parsed_enclosingmethod_attribute,
3086 u2 enclosing_method_class_index,
3087 u2 enclosing_method_method_index,
3088 TRAPS) {
3089 const u1* const current_mark = cfs->current();
3090 u2 length = 0;
3091 if (inner_classes_attribute_start != NULL) {
3092 cfs->set_current(inner_classes_attribute_start);
3093 cfs->guarantee_more(2, CHECK_0); // length
3094 length = cfs->get_u2_fast();
3095 }
3096
3097 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3098 // method data:
3099 // [inner_class_info_index,
3100 // outer_class_info_index,
3101 // inner_name_index,
3102 // inner_class_access_flags,
3103 // ...
3104 // enclosing_method_class_index,
3105 // enclosing_method_method_index]
3106 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3107 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3108 _inner_classes = inner_classes;
3109
3110 int index = 0;
3111 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3112 for (int n = 0; n < length; n++) {
3113 // Inner class index
3114 const u2 inner_class_info_index = cfs->get_u2_fast();
3115 check_property(
3116 valid_klass_reference_at(inner_class_info_index),
3117 "inner_class_info_index %u has bad constant type in class file %s",
3118 inner_class_info_index, CHECK_0);
3119 // Outer class index
3120 const u2 outer_class_info_index = cfs->get_u2_fast();
3121 check_property(
3122 outer_class_info_index == 0 ||
3123 valid_klass_reference_at(outer_class_info_index),
3124 "outer_class_info_index %u has bad constant type in class file %s",
3125 outer_class_info_index, CHECK_0);
3126 // Inner class name
3127 const u2 inner_name_index = cfs->get_u2_fast();
3128 check_property(
3129 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3130 "inner_name_index %u has bad constant type in class file %s",
3131 inner_name_index, CHECK_0);
3132 if (_need_verify) {
3133 guarantee_property(inner_class_info_index != outer_class_info_index,
3134 "Class is both outer and inner class in class file %s", CHECK_0);
3135 }
3136 // Access flags
3137 jint flags;
3138 // JVM_ACC_MODULE is defined in JDK-9 and later.
3139 if (_major_version >= JAVA_9_VERSION) {
3140 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3141 } else {
3142 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3143 }
3144 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3145 // Set abstract bit for old class files for backward compatibility
3146 flags |= JVM_ACC_ABSTRACT;
3147 }
3148 verify_legal_class_modifiers(flags, CHECK_0);
3149 AccessFlags inner_access_flags(flags);
3150
3151 inner_classes->at_put(index++, inner_class_info_index);
3152 inner_classes->at_put(index++, outer_class_info_index);
3153 inner_classes->at_put(index++, inner_name_index);
3154 inner_classes->at_put(index++, inner_access_flags.as_short());
3155 }
3156
3157 // 4347400: make sure there's no duplicate entry in the classes array
3158 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3159 for(int i = 0; i < length * 4; i += 4) {
3160 for(int j = i + 4; j < length * 4; j += 4) {
3161 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3162 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3163 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3164 inner_classes->at(i+3) != inner_classes->at(j+3)),
3165 "Duplicate entry in InnerClasses in class file %s",
3166 CHECK_0);
3167 }
3168 }
3169 }
3170
3171 // Set EnclosingMethod class and method indexes.
3172 if (parsed_enclosingmethod_attribute) {
3173 inner_classes->at_put(index++, enclosing_method_class_index);
3174 inner_classes->at_put(index++, enclosing_method_method_index);
3175 }
3176 assert(index == size, "wrong size");
3177
3178 // Restore buffer's current position.
3179 cfs->set_current(current_mark);
3180
3181 return length;
3182 }
3183
3184 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3185 const u1* const nest_members_attribute_start,
3186 TRAPS) {
3187 const u1* const current_mark = cfs->current();
3188 u2 length = 0;
3189 if (nest_members_attribute_start != NULL) {
3190 cfs->set_current(nest_members_attribute_start);
3191 cfs->guarantee_more(2, CHECK_0); // length
3192 length = cfs->get_u2_fast();
3193 }
3194 const int size = length;
3195 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3196 _nest_members = nest_members;
3197
3198 int index = 0;
3199 cfs->guarantee_more(2 * length, CHECK_0);
3200 for (int n = 0; n < length; n++) {
3201 const u2 class_info_index = cfs->get_u2_fast();
3202 check_property(
3203 valid_klass_reference_at(class_info_index),
3204 "Nest member class_info_index %u has bad constant type in class file %s",
3205 class_info_index, CHECK_0);
3206 nest_members->at_put(index++, class_info_index);
3207 }
3208 assert(index == size, "wrong size");
3209
3210 // Restore buffer's current position.
3211 cfs->set_current(current_mark);
3212
3213 return length;
3214 }
3215
3216 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3217 set_class_synthetic_flag(true);
3218 }
3219
3220 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3221 assert(cfs != NULL, "invariant");
3222
3223 const u2 signature_index = cfs->get_u2(CHECK);
3224 check_property(
3225 valid_symbol_at(signature_index),
3226 "Invalid constant pool index %u in Signature attribute in class file %s",
3227 signature_index, CHECK);
3228 set_class_generic_signature_index(signature_index);
3229 }
3230
3231 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3232 ConstantPool* cp,
3233 u4 attribute_byte_length,
3234 TRAPS) {
3235 assert(cfs != NULL, "invariant");
3236 assert(cp != NULL, "invariant");
3237
3238 const u1* const current_start = cfs->current();
3239
3240 guarantee_property(attribute_byte_length >= sizeof(u2),
3241 "Invalid BootstrapMethods attribute length %u in class file %s",
3242 attribute_byte_length,
3243 CHECK);
3244
3245 cfs->guarantee_more(attribute_byte_length, CHECK);
3246
3247 const int attribute_array_length = cfs->get_u2_fast();
3248
3249 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3250 "Short length on BootstrapMethods in class file %s",
3251 CHECK);
3252
3253
3254 // The attribute contains a counted array of counted tuples of shorts,
3255 // represending bootstrap specifiers:
3256 // length*{bootstrap_method_index, argument_count*{argument_index}}
3257 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3258 // operand_count = number of shorts in attr, except for leading length
3259
3260 // The attribute is copied into a short[] array.
3261 // The array begins with a series of short[2] pairs, one for each tuple.
3262 const int index_size = (attribute_array_length * 2);
3263
3264 Array<u2>* const operands =
3265 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3266
3267 // Eagerly assign operands so they will be deallocated with the constant
3268 // pool if there is an error.
3269 cp->set_operands(operands);
3270
3271 int operand_fill_index = index_size;
3272 const int cp_size = cp->length();
3273
3274 for (int n = 0; n < attribute_array_length; n++) {
3275 // Store a 32-bit offset into the header of the operand array.
3276 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3277
3278 // Read a bootstrap specifier.
3279 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3280 const u2 bootstrap_method_index = cfs->get_u2_fast();
3281 const u2 argument_count = cfs->get_u2_fast();
3282 check_property(
3283 valid_cp_range(bootstrap_method_index, cp_size) &&
3284 cp->tag_at(bootstrap_method_index).is_method_handle(),
3285 "bootstrap_method_index %u has bad constant type in class file %s",
3286 bootstrap_method_index,
3287 CHECK);
3288
3289 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3290 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3291 CHECK);
3292
3293 operands->at_put(operand_fill_index++, bootstrap_method_index);
3294 operands->at_put(operand_fill_index++, argument_count);
3295
3296 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3297 for (int j = 0; j < argument_count; j++) {
3298 const u2 argument_index = cfs->get_u2_fast();
3299 check_property(
3300 valid_cp_range(argument_index, cp_size) &&
3301 cp->tag_at(argument_index).is_loadable_constant(),
3302 "argument_index %u has bad constant type in class file %s",
3303 argument_index,
3304 CHECK);
3305 operands->at_put(operand_fill_index++, argument_index);
3306 }
3307 }
3308 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3309 "Bad length on BootstrapMethods in class file %s",
3310 CHECK);
3311 }
3312
3313 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3314 ConstantPool* cp,
3315 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3316 TRAPS) {
3317 assert(cfs != NULL, "invariant");
3318 assert(cp != NULL, "invariant");
3319 assert(parsed_annotations != NULL, "invariant");
3320
3321 // Set inner classes attribute to default sentinel
3322 _inner_classes = Universe::the_empty_short_array();
3323 // Set nest members attribute to default sentinel
3324 _nest_members = Universe::the_empty_short_array();
3325 cfs->guarantee_more(2, CHECK); // attributes_count
3326 u2 attributes_count = cfs->get_u2_fast();
3327 bool parsed_sourcefile_attribute = false;
3328 bool parsed_innerclasses_attribute = false;
3329 bool parsed_nest_members_attribute = false;
3330 bool parsed_nest_host_attribute = false;
3331 bool parsed_enclosingmethod_attribute = false;
3332 bool parsed_bootstrap_methods_attribute = false;
3333 const u1* runtime_visible_annotations = NULL;
3334 int runtime_visible_annotations_length = 0;
3335 const u1* runtime_invisible_annotations = NULL;
3336 int runtime_invisible_annotations_length = 0;
3337 const u1* runtime_visible_type_annotations = NULL;
3338 int runtime_visible_type_annotations_length = 0;
3339 const u1* runtime_invisible_type_annotations = NULL;
3340 int runtime_invisible_type_annotations_length = 0;
3341 bool runtime_invisible_type_annotations_exists = false;
3342 bool runtime_invisible_annotations_exists = false;
3343 bool parsed_source_debug_ext_annotations_exist = false;
3344 const u1* inner_classes_attribute_start = NULL;
3345 u4 inner_classes_attribute_length = 0;
3346 u2 enclosing_method_class_index = 0;
3347 u2 enclosing_method_method_index = 0;
3348 const u1* nest_members_attribute_start = NULL;
3349 u4 nest_members_attribute_length = 0;
3350
3351 // Iterate over attributes
3352 while (attributes_count--) {
3353 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3354 const u2 attribute_name_index = cfs->get_u2_fast();
3355 const u4 attribute_length = cfs->get_u4_fast();
3356 check_property(
3357 valid_symbol_at(attribute_name_index),
3358 "Attribute name has bad constant pool index %u in class file %s",
3359 attribute_name_index, CHECK);
3360 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3361 if (tag == vmSymbols::tag_source_file()) {
3362 // Check for SourceFile tag
3363 if (_need_verify) {
3364 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3365 }
3366 if (parsed_sourcefile_attribute) {
3367 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3368 } else {
3369 parsed_sourcefile_attribute = true;
3370 }
3371 parse_classfile_sourcefile_attribute(cfs, CHECK);
3372 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3373 // Check for SourceDebugExtension tag
3374 if (parsed_source_debug_ext_annotations_exist) {
3375 classfile_parse_error(
3376 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3377 }
3378 parsed_source_debug_ext_annotations_exist = true;
3379 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3380 } else if (tag == vmSymbols::tag_inner_classes()) {
3381 // Check for InnerClasses tag
3382 if (parsed_innerclasses_attribute) {
3383 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3384 } else {
3385 parsed_innerclasses_attribute = true;
3386 }
3387 inner_classes_attribute_start = cfs->current();
3388 inner_classes_attribute_length = attribute_length;
3389 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3390 } else if (tag == vmSymbols::tag_synthetic()) {
3391 // Check for Synthetic tag
3392 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3393 if (attribute_length != 0) {
3394 classfile_parse_error(
3395 "Invalid Synthetic classfile attribute length %u in class file %s",
3396 attribute_length, CHECK);
3397 }
3398 parse_classfile_synthetic_attribute(CHECK);
3399 } else if (tag == vmSymbols::tag_deprecated()) {
3400 // Check for Deprecatd tag - 4276120
3401 if (attribute_length != 0) {
3402 classfile_parse_error(
3403 "Invalid Deprecated classfile attribute length %u in class file %s",
3404 attribute_length, CHECK);
3405 }
3406 } else if (_major_version >= JAVA_1_5_VERSION) {
3407 if (tag == vmSymbols::tag_signature()) {
3408 if (_generic_signature_index != 0) {
3409 classfile_parse_error(
3410 "Multiple Signature attributes in class file %s", CHECK);
3411 }
3412 if (attribute_length != 2) {
3413 classfile_parse_error(
3414 "Wrong Signature attribute length %u in class file %s",
3415 attribute_length, CHECK);
3416 }
3417 parse_classfile_signature_attribute(cfs, CHECK);
3418 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3419 if (runtime_visible_annotations != NULL) {
3420 classfile_parse_error(
3421 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3422 }
3423 runtime_visible_annotations_length = attribute_length;
3424 runtime_visible_annotations = cfs->current();
3425 assert(runtime_visible_annotations != NULL, "null visible annotations");
3426 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3427 parse_annotations(cp,
3428 runtime_visible_annotations,
3429 runtime_visible_annotations_length,
3430 parsed_annotations,
3431 _loader_data,
3432 CHECK);
3433 cfs->skip_u1_fast(runtime_visible_annotations_length);
3434 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3435 if (runtime_invisible_annotations_exists) {
3436 classfile_parse_error(
3437 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3438 }
3439 runtime_invisible_annotations_exists = true;
3440 if (PreserveAllAnnotations) {
3441 runtime_invisible_annotations_length = attribute_length;
3442 runtime_invisible_annotations = cfs->current();
3443 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3444 }
3445 cfs->skip_u1(attribute_length, CHECK);
3446 } else if (tag == vmSymbols::tag_enclosing_method()) {
3447 if (parsed_enclosingmethod_attribute) {
3448 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3449 } else {
3450 parsed_enclosingmethod_attribute = true;
3451 }
3452 guarantee_property(attribute_length == 4,
3453 "Wrong EnclosingMethod attribute length %u in class file %s",
3454 attribute_length, CHECK);
3455 cfs->guarantee_more(4, CHECK); // class_index, method_index
3456 enclosing_method_class_index = cfs->get_u2_fast();
3457 enclosing_method_method_index = cfs->get_u2_fast();
3458 if (enclosing_method_class_index == 0) {
3459 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3460 }
3461 // Validate the constant pool indices and types
3462 check_property(valid_klass_reference_at(enclosing_method_class_index),
3463 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3464 if (enclosing_method_method_index != 0 &&
3465 (!cp->is_within_bounds(enclosing_method_method_index) ||
3466 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3467 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3468 }
3469 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3470 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3471 if (parsed_bootstrap_methods_attribute) {
3472 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3473 }
3474 parsed_bootstrap_methods_attribute = true;
3475 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3476 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3477 if (runtime_visible_type_annotations != NULL) {
3478 classfile_parse_error(
3479 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3480 }
3481 runtime_visible_type_annotations_length = attribute_length;
3482 runtime_visible_type_annotations = cfs->current();
3483 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3484 // No need for the VM to parse Type annotations
3485 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3486 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3487 if (runtime_invisible_type_annotations_exists) {
3488 classfile_parse_error(
3489 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3490 } else {
3491 runtime_invisible_type_annotations_exists = true;
3492 }
3493 if (PreserveAllAnnotations) {
3494 runtime_invisible_type_annotations_length = attribute_length;
3495 runtime_invisible_type_annotations = cfs->current();
3496 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3497 }
3498 cfs->skip_u1(attribute_length, CHECK);
3499 } else if (_major_version >= JAVA_11_VERSION) {
3500 if (tag == vmSymbols::tag_nest_members()) {
3501 // Check for NestMembers tag
3502 if (parsed_nest_members_attribute) {
3503 classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3504 } else {
3505 parsed_nest_members_attribute = true;
3506 }
3507 if (parsed_nest_host_attribute) {
3508 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3509 }
3510 nest_members_attribute_start = cfs->current();
3511 nest_members_attribute_length = attribute_length;
3512 cfs->skip_u1(nest_members_attribute_length, CHECK);
3513 } else if (tag == vmSymbols::tag_nest_host()) {
3514 if (parsed_nest_host_attribute) {
3515 classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3516 } else {
3517 parsed_nest_host_attribute = true;
3518 }
3519 if (parsed_nest_members_attribute) {
3520 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3521 }
3522 if (_need_verify) {
3523 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3524 }
3525 cfs->guarantee_more(2, CHECK);
3526 u2 class_info_index = cfs->get_u2_fast();
3527 check_property(
3528 valid_klass_reference_at(class_info_index),
3529 "Nest-host class_info_index %u has bad constant type in class file %s",
3530 class_info_index, CHECK);
3531 _nest_host = class_info_index;
3532 } else {
3533 // Unknown attribute
3534 cfs->skip_u1(attribute_length, CHECK);
3535 }
3536 } else {
3537 // Unknown attribute
3538 cfs->skip_u1(attribute_length, CHECK);
3539 }
3540 } else {
3541 // Unknown attribute
3542 cfs->skip_u1(attribute_length, CHECK);
3543 }
3544 }
3545 _class_annotations = assemble_annotations(runtime_visible_annotations,
3546 runtime_visible_annotations_length,
3547 runtime_invisible_annotations,
3548 runtime_invisible_annotations_length,
3549 CHECK);
3550 _class_type_annotations = assemble_annotations(runtime_visible_type_annotations,
3551 runtime_visible_type_annotations_length,
3552 runtime_invisible_type_annotations,
3553 runtime_invisible_type_annotations_length,
3554 CHECK);
3555
3556 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3557 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3558 cfs,
3559 inner_classes_attribute_start,
3560 parsed_innerclasses_attribute,
3561 enclosing_method_class_index,
3562 enclosing_method_method_index,
3563 CHECK);
3564 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3565 guarantee_property(
3566 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3567 "Wrong InnerClasses attribute length in class file %s", CHECK);
3568 }
3569 }
3570
3571 if (parsed_nest_members_attribute) {
3572 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3573 cfs,
3574 nest_members_attribute_start,
3575 CHECK);
3576 if (_need_verify) {
3577 guarantee_property(
3578 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3579 "Wrong NestMembers attribute length in class file %s", CHECK);
3580 }
3581 }
3582
3583 if (_max_bootstrap_specifier_index >= 0) {
3584 guarantee_property(parsed_bootstrap_methods_attribute,
3585 "Missing BootstrapMethods attribute in class file %s", CHECK);
3586 }
3587 }
3588
3589 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3590 assert(k != NULL, "invariant");
3591
3592 if (_synthetic_flag)
3593 k->set_is_synthetic();
3594 if (_sourcefile_index != 0) {
3595 k->set_source_file_name_index(_sourcefile_index);
3596 }
3597 if (_generic_signature_index != 0) {
3598 k->set_generic_signature_index(_generic_signature_index);
3599 }
3600 if (_sde_buffer != NULL) {
3601 k->set_source_debug_extension(_sde_buffer, _sde_length);
3602 }
3603 }
3604
3605 // Create the Annotations object that will
3606 // hold the annotations array for the Klass.
3607 void ClassFileParser::create_combined_annotations(TRAPS) {
3608 if (_class_annotations == NULL &&
3609 _class_type_annotations == NULL &&
3610 _fields_annotations == NULL &&
3611 _fields_type_annotations == NULL) {
3612 // Don't create the Annotations object unnecessarily.
3613 return;
3614 }
3615
3616 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3617 annotations->set_class_annotations(_class_annotations);
3618 annotations->set_class_type_annotations(_class_type_annotations);
3619 annotations->set_fields_annotations(_fields_annotations);
3620 annotations->set_fields_type_annotations(_fields_type_annotations);
3621
3622 // This is the Annotations object that will be
3623 // assigned to InstanceKlass being constructed.
3624 _combined_annotations = annotations;
3625
3626 // The annotations arrays below has been transfered the
3627 // _combined_annotations so these fields can now be cleared.
3628 _class_annotations = NULL;
3629 _class_type_annotations = NULL;
3630 _fields_annotations = NULL;
3631 _fields_type_annotations = NULL;
3632 }
3633
3634 // Transfer ownership of metadata allocated to the InstanceKlass.
3635 void ClassFileParser::apply_parsed_class_metadata(
3636 InstanceKlass* this_klass,
3637 int java_fields_count, TRAPS) {
3638 assert(this_klass != NULL, "invariant");
3639
3640 _cp->set_pool_holder(this_klass);
3641 this_klass->set_constants(_cp);
3642 this_klass->set_fields(_fields, java_fields_count);
3643 this_klass->set_methods(_methods);
3644 this_klass->set_inner_classes(_inner_classes);
3645 this_klass->set_nest_members(_nest_members);
3646 this_klass->set_nest_host_index(_nest_host);
3647 this_klass->set_local_interfaces(_local_interfaces);
3648 this_klass->set_annotations(_combined_annotations);
3649 // Delay the setting of _transitive_interfaces until after initialize_supers() in
3650 // fill_instance_klass(). It is because the _transitive_interfaces may be shared with
3651 // its _super. If an OOM occurs while loading the current klass, its _super field
3652 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3653 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3654 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3655
3656 // Clear out these fields so they don't get deallocated by the destructor
3657 clear_class_metadata();
3658 }
3659
3660 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3661 int runtime_visible_annotations_length,
3662 const u1* const runtime_invisible_annotations,
3663 int runtime_invisible_annotations_length,
3664 TRAPS) {
3665 AnnotationArray* annotations = NULL;
3666 if (runtime_visible_annotations != NULL ||
3667 runtime_invisible_annotations != NULL) {
3668 annotations = MetadataFactory::new_array<u1>(_loader_data,
3669 runtime_visible_annotations_length +
3670 runtime_invisible_annotations_length,
3671 CHECK_(annotations));
3672 if (runtime_visible_annotations != NULL) {
3673 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3674 annotations->at_put(i, runtime_visible_annotations[i]);
3675 }
3676 }
3677 if (runtime_invisible_annotations != NULL) {
3678 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3679 int append = runtime_visible_annotations_length+i;
3680 annotations->at_put(append, runtime_invisible_annotations[i]);
3681 }
3682 }
3683 }
3684 return annotations;
3685 }
3686
3687 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3688 const int super_class_index,
3689 const bool need_verify,
3690 TRAPS) {
3691 assert(cp != NULL, "invariant");
3692 const InstanceKlass* super_klass = NULL;
3693
3694 if (super_class_index == 0) {
3695 check_property(_class_name == vmSymbols::java_lang_Object(),
3696 "Invalid superclass index %u in class file %s",
3697 super_class_index,
3698 CHECK_NULL);
3699 } else {
3700 check_property(valid_klass_reference_at(super_class_index),
3701 "Invalid superclass index %u in class file %s",
3702 super_class_index,
3703 CHECK_NULL);
3704 // The class name should be legal because it is checked when parsing constant pool.
3705 // However, make sure it is not an array type.
3706 bool is_array = false;
3707 if (cp->tag_at(super_class_index).is_klass()) {
3708 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3709 if (need_verify)
3710 is_array = super_klass->is_array_klass();
3711 } else if (need_verify) {
3712 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3713 }
3714 if (need_verify) {
3715 guarantee_property(!is_array,
3716 "Bad superclass name in class file %s", CHECK_NULL);
3717 }
3718 }
3719 return super_klass;
3720 }
3721
3722 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3723 unsigned int nonstatic_oop_map_count,
3724 int first_nonstatic_oop_offset) {
3725
3726 unsigned int map_count =
3727 NULL == super ? 0 : super->nonstatic_oop_map_count();
3728 if (nonstatic_oop_map_count > 0) {
3729 // We have oops to add to map
3730 if (map_count == 0) {
3731 map_count = nonstatic_oop_map_count;
3732 }
3733 else {
3734 // Check whether we should add a new map block or whether the last one can
3735 // be extended
3736 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3737 const OopMapBlock* const last_map = first_map + map_count - 1;
3738
3739 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3740 if (next_offset == first_nonstatic_oop_offset) {
3741 // There is no gap bettwen superklass's last oop field and first
3742 // local oop field, merge maps.
3743 nonstatic_oop_map_count -= 1;
3744 }
3745 else {
3746 // Superklass didn't end with a oop field, add extra maps
3747 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3748 }
3749 map_count += nonstatic_oop_map_count;
3750 }
3751 }
3752 return map_count;
3753 }
3754
3755 #ifndef PRODUCT
3756 static void print_field_layout(const Symbol* name,
3757 Array<u2>* fields,
3758 ConstantPool* cp,
3759 int instance_size,
3760 int instance_fields_start,
3761 int instance_fields_end,
3762 int static_fields_end) {
3763
3764 assert(name != NULL, "invariant");
3765
3766 tty->print("%s: field layout\n", name->as_klass_external_name());
3767 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3768 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3769 if (!fs.access_flags().is_static()) {
3770 tty->print(" @%3d \"%s\" %s\n",
3771 fs.offset(),
3772 fs.name()->as_klass_external_name(),
3773 fs.signature()->as_klass_external_name());
3774 }
3775 }
3776 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3777 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3778 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3779 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3780 if (fs.access_flags().is_static()) {
3781 tty->print(" @%3d \"%s\" %s\n",
3782 fs.offset(),
3783 fs.name()->as_klass_external_name(),
3784 fs.signature()->as_klass_external_name());
3785 }
3786 }
3787 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3788 tty->print("\n");
3789 }
3790 #endif
3791
3792 // Values needed for oopmap and InstanceKlass creation
3793 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3794 public:
3795 int* nonstatic_oop_offsets;
3796 unsigned int* nonstatic_oop_counts;
3797 unsigned int nonstatic_oop_map_count;
3798 unsigned int total_oop_map_count;
3799 int instance_size;
3800 int nonstatic_field_size;
3801 int static_field_size;
3802 bool has_nonstatic_fields;
3803 };
3804
3805 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3806 void ClassFileParser::layout_fields(ConstantPool* cp,
3807 const FieldAllocationCount* fac,
3808 const ClassAnnotationCollector* parsed_annotations,
3809 FieldLayoutInfo* info,
3810 TRAPS) {
3811
3812 assert(cp != NULL, "invariant");
3813
3814 // Field size and offset computation
3815 int nonstatic_field_size = _super_klass == NULL ? 0 :
3816 _super_klass->nonstatic_field_size();
3817
3818 // Count the contended fields by type.
3819 //
3820 // We ignore static fields, because @Contended is not supported for them.
3821 // The layout code below will also ignore the static fields.
3822 int nonstatic_contended_count = 0;
3823 FieldAllocationCount fac_contended;
3824 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3825 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3826 if (fs.is_contended()) {
3827 fac_contended.count[atype]++;
3828 if (!fs.access_flags().is_static()) {
3829 nonstatic_contended_count++;
3830 }
3831 }
3832 }
3833
3834
3835 // Calculate the starting byte offsets
3836 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3837 int next_static_double_offset = next_static_oop_offset +
3838 ((fac->count[STATIC_OOP]) * heapOopSize);
3839 if (fac->count[STATIC_DOUBLE]) {
3840 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3841 }
3842
3843 int next_static_word_offset = next_static_double_offset +
3844 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3845 int next_static_short_offset = next_static_word_offset +
3846 ((fac->count[STATIC_WORD]) * BytesPerInt);
3847 int next_static_byte_offset = next_static_short_offset +
3848 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3849
3850 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3851 nonstatic_field_size * heapOopSize;
3852
3853 int next_nonstatic_field_offset = nonstatic_fields_start;
3854
3855 const bool is_contended_class = parsed_annotations->is_contended();
3856
3857 // Class is contended, pad before all the fields
3858 if (is_contended_class) {
3859 next_nonstatic_field_offset += ContendedPaddingWidth;
3860 }
3861
3862 // Compute the non-contended fields count.
3863 // The packing code below relies on these counts to determine if some field
3864 // can be squeezed into the alignment gap. Contended fields are obviously
3865 // exempt from that.
3866 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3867 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3868 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3869 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3870 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3871
3872 // Total non-static fields count, including every contended field
3873 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3874 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3875 fac->count[NONSTATIC_OOP];
3876
3877 const bool super_has_nonstatic_fields =
3878 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3879 const bool has_nonstatic_fields =
3880 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3881
3882
3883 // Prepare list of oops for oop map generation.
3884 //
3885 // "offset" and "count" lists are describing the set of contiguous oop
3886 // regions. offset[i] is the start of the i-th region, which then has
3887 // count[i] oops following. Before we know how many regions are required,
3888 // we pessimistically allocate the maps to fit all the oops into the
3889 // distinct regions.
3890 //
3891 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3892 // to figure out if we still need to do this.
3893 unsigned int nonstatic_oop_map_count = 0;
3894 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3895
3896 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3897 THREAD, int, max_nonstatic_oop_maps);
3898 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3899 THREAD, unsigned int, max_nonstatic_oop_maps);
3900
3901 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3902
3903 bool compact_fields = CompactFields;
3904 int allocation_style = FieldsAllocationStyle;
3905 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3906 assert(false, "0 <= FieldsAllocationStyle <= 2");
3907 allocation_style = 1; // Optimistic
3908 }
3909
3910 // The next classes have predefined hard-coded fields offsets
3911 // (see in JavaClasses::compute_hard_coded_offsets()).
3912 // Use default fields allocation order for them.
3913 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3914 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3915 _class_name == vmSymbols::java_lang_Class() ||
3916 _class_name == vmSymbols::java_lang_ClassLoader() ||
3917 _class_name == vmSymbols::java_lang_ref_Reference() ||
3918 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3919 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3920 _class_name == vmSymbols::java_lang_String() ||
3921 _class_name == vmSymbols::java_lang_Throwable() ||
3922 _class_name == vmSymbols::java_lang_Boolean() ||
3923 _class_name == vmSymbols::java_lang_Character() ||
3924 _class_name == vmSymbols::java_lang_Float() ||
3925 _class_name == vmSymbols::java_lang_Double() ||
3926 _class_name == vmSymbols::java_lang_Byte() ||
3927 _class_name == vmSymbols::java_lang_Short() ||
3928 _class_name == vmSymbols::java_lang_Integer() ||
3929 _class_name == vmSymbols::java_lang_Long())) {
3930 allocation_style = 0; // Allocate oops first
3931 compact_fields = false; // Don't compact fields
3932 }
3933
3934 int next_nonstatic_oop_offset = 0;
3935 int next_nonstatic_double_offset = 0;
3936
3937 // Rearrange fields for a given allocation style
3938 if( allocation_style == 0 ) {
3939 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3940 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3941 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3942 (nonstatic_oop_count * heapOopSize);
3943 } else if( allocation_style == 1 ) {
3944 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3945 next_nonstatic_double_offset = next_nonstatic_field_offset;
3946 } else if( allocation_style == 2 ) {
3947 // Fields allocation: oops fields in super and sub classes are together.
3948 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3949 _super_klass->nonstatic_oop_map_size() > 0 ) {
3950 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3951 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3952 const OopMapBlock* const last_map = first_map + map_count - 1;
3953 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3954 if (next_offset == next_nonstatic_field_offset) {
3955 allocation_style = 0; // allocate oops first
3956 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3957 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3958 (nonstatic_oop_count * heapOopSize);
3959 }
3960 }
3961 if( allocation_style == 2 ) {
3962 allocation_style = 1; // allocate oops last
3963 next_nonstatic_double_offset = next_nonstatic_field_offset;
3964 }
3965 } else {
3966 ShouldNotReachHere();
3967 }
3968
3969 int nonstatic_oop_space_count = 0;
3970 int nonstatic_word_space_count = 0;
3971 int nonstatic_short_space_count = 0;
3972 int nonstatic_byte_space_count = 0;
3973 int nonstatic_oop_space_offset = 0;
3974 int nonstatic_word_space_offset = 0;
3975 int nonstatic_short_space_offset = 0;
3976 int nonstatic_byte_space_offset = 0;
3977
3978 // Try to squeeze some of the fields into the gaps due to
3979 // long/double alignment.
3980 if (nonstatic_double_count > 0) {
3981 int offset = next_nonstatic_double_offset;
3982 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
3983 if (compact_fields && offset != next_nonstatic_double_offset) {
3984 // Allocate available fields into the gap before double field.
3985 int length = next_nonstatic_double_offset - offset;
3986 assert(length == BytesPerInt, "");
3987 nonstatic_word_space_offset = offset;
3988 if (nonstatic_word_count > 0) {
3989 nonstatic_word_count -= 1;
3990 nonstatic_word_space_count = 1; // Only one will fit
3991 length -= BytesPerInt;
3992 offset += BytesPerInt;
3993 }
3994 nonstatic_short_space_offset = offset;
3995 while (length >= BytesPerShort && nonstatic_short_count > 0) {
3996 nonstatic_short_count -= 1;
3997 nonstatic_short_space_count += 1;
3998 length -= BytesPerShort;
3999 offset += BytesPerShort;
4000 }
4001 nonstatic_byte_space_offset = offset;
4002 while (length > 0 && nonstatic_byte_count > 0) {
4003 nonstatic_byte_count -= 1;
4004 nonstatic_byte_space_count += 1;
4005 length -= 1;
4006 }
4007 // Allocate oop field in the gap if there are no other fields for that.
4008 nonstatic_oop_space_offset = offset;
4009 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4010 allocation_style != 0) { // when oop fields not first
4011 nonstatic_oop_count -= 1;
4012 nonstatic_oop_space_count = 1; // Only one will fit
4013 length -= heapOopSize;
4014 offset += heapOopSize;
4015 }
4016 }
4017 }
4018
4019 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4020 (nonstatic_double_count * BytesPerLong);
4021 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4022 (nonstatic_word_count * BytesPerInt);
4023 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4024 (nonstatic_short_count * BytesPerShort);
4025 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4026 nonstatic_byte_count;
4027
4028 // let oops jump before padding with this allocation style
4029 if( allocation_style == 1 ) {
4030 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4031 if( nonstatic_oop_count > 0 ) {
4032 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4033 }
4034 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4035 }
4036
4037 // Iterate over fields again and compute correct offsets.
4038 // The field allocation type was temporarily stored in the offset slot.
4039 // oop fields are located before non-oop fields (static and non-static).
4040 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4041
4042 // skip already laid out fields
4043 if (fs.is_offset_set()) continue;
4044
4045 // contended instance fields are handled below
4046 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4047
4048 int real_offset = 0;
4049 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4050
4051 // pack the rest of the fields
4052 switch (atype) {
4053 case STATIC_OOP:
4054 real_offset = next_static_oop_offset;
4055 next_static_oop_offset += heapOopSize;
4056 break;
4057 case STATIC_BYTE:
4058 real_offset = next_static_byte_offset;
4059 next_static_byte_offset += 1;
4060 break;
4061 case STATIC_SHORT:
4062 real_offset = next_static_short_offset;
4063 next_static_short_offset += BytesPerShort;
4064 break;
4065 case STATIC_WORD:
4066 real_offset = next_static_word_offset;
4067 next_static_word_offset += BytesPerInt;
4068 break;
4069 case STATIC_DOUBLE:
4070 real_offset = next_static_double_offset;
4071 next_static_double_offset += BytesPerLong;
4072 break;
4073 case NONSTATIC_OOP:
4074 if( nonstatic_oop_space_count > 0 ) {
4075 real_offset = nonstatic_oop_space_offset;
4076 nonstatic_oop_space_offset += heapOopSize;
4077 nonstatic_oop_space_count -= 1;
4078 } else {
4079 real_offset = next_nonstatic_oop_offset;
4080 next_nonstatic_oop_offset += heapOopSize;
4081 }
4082
4083 // Record this oop in the oop maps
4084 if( nonstatic_oop_map_count > 0 &&
4085 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4086 real_offset -
4087 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4088 heapOopSize ) {
4089 // This oop is adjacent to the previous one, add to current oop map
4090 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4091 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4092 } else {
4093 // This oop is not adjacent to the previous one, create new oop map
4094 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4095 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4096 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4097 nonstatic_oop_map_count += 1;
4098 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4099 first_nonstatic_oop_offset = real_offset;
4100 }
4101 }
4102 break;
4103 case NONSTATIC_BYTE:
4104 if( nonstatic_byte_space_count > 0 ) {
4105 real_offset = nonstatic_byte_space_offset;
4106 nonstatic_byte_space_offset += 1;
4107 nonstatic_byte_space_count -= 1;
4108 } else {
4109 real_offset = next_nonstatic_byte_offset;
4110 next_nonstatic_byte_offset += 1;
4111 }
4112 break;
4113 case NONSTATIC_SHORT:
4114 if( nonstatic_short_space_count > 0 ) {
4115 real_offset = nonstatic_short_space_offset;
4116 nonstatic_short_space_offset += BytesPerShort;
4117 nonstatic_short_space_count -= 1;
4118 } else {
4119 real_offset = next_nonstatic_short_offset;
4120 next_nonstatic_short_offset += BytesPerShort;
4121 }
4122 break;
4123 case NONSTATIC_WORD:
4124 if( nonstatic_word_space_count > 0 ) {
4125 real_offset = nonstatic_word_space_offset;
4126 nonstatic_word_space_offset += BytesPerInt;
4127 nonstatic_word_space_count -= 1;
4128 } else {
4129 real_offset = next_nonstatic_word_offset;
4130 next_nonstatic_word_offset += BytesPerInt;
4131 }
4132 break;
4133 case NONSTATIC_DOUBLE:
4134 real_offset = next_nonstatic_double_offset;
4135 next_nonstatic_double_offset += BytesPerLong;
4136 break;
4137 default:
4138 ShouldNotReachHere();
4139 }
4140 fs.set_offset(real_offset);
4141 }
4142
4143
4144 // Handle the contended cases.
4145 //
4146 // Each contended field should not intersect the cache line with another contended field.
4147 // In the absence of alignment information, we end up with pessimistically separating
4148 // the fields with full-width padding.
4149 //
4150 // Additionally, this should not break alignment for the fields, so we round the alignment up
4151 // for each field.
4152 if (nonstatic_contended_count > 0) {
4153
4154 // if there is at least one contended field, we need to have pre-padding for them
4155 next_nonstatic_padded_offset += ContendedPaddingWidth;
4156
4157 // collect all contended groups
4158 ResourceBitMap bm(cp->size());
4159 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4160 // skip already laid out fields
4161 if (fs.is_offset_set()) continue;
4162
4163 if (fs.is_contended()) {
4164 bm.set_bit(fs.contended_group());
4165 }
4166 }
4167
4168 int current_group = -1;
4169 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4170
4171 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4172
4173 // skip already laid out fields
4174 if (fs.is_offset_set()) continue;
4175
4176 // skip non-contended fields and fields from different group
4177 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4178
4179 // handle statics below
4180 if (fs.access_flags().is_static()) continue;
4181
4182 int real_offset = 0;
4183 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4184
4185 switch (atype) {
4186 case NONSTATIC_BYTE:
4187 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4188 real_offset = next_nonstatic_padded_offset;
4189 next_nonstatic_padded_offset += 1;
4190 break;
4191
4192 case NONSTATIC_SHORT:
4193 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4194 real_offset = next_nonstatic_padded_offset;
4195 next_nonstatic_padded_offset += BytesPerShort;
4196 break;
4197
4198 case NONSTATIC_WORD:
4199 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4200 real_offset = next_nonstatic_padded_offset;
4201 next_nonstatic_padded_offset += BytesPerInt;
4202 break;
4203
4204 case NONSTATIC_DOUBLE:
4205 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4206 real_offset = next_nonstatic_padded_offset;
4207 next_nonstatic_padded_offset += BytesPerLong;
4208 break;
4209
4210 case NONSTATIC_OOP:
4211 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4212 real_offset = next_nonstatic_padded_offset;
4213 next_nonstatic_padded_offset += heapOopSize;
4214
4215 // Record this oop in the oop maps
4216 if( nonstatic_oop_map_count > 0 &&
4217 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4218 real_offset -
4219 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4220 heapOopSize ) {
4221 // This oop is adjacent to the previous one, add to current oop map
4222 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4223 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4224 } else {
4225 // This oop is not adjacent to the previous one, create new oop map
4226 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4227 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4228 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4229 nonstatic_oop_map_count += 1;
4230 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4231 first_nonstatic_oop_offset = real_offset;
4232 }
4233 }
4234 break;
4235
4236 default:
4237 ShouldNotReachHere();
4238 }
4239
4240 if (fs.contended_group() == 0) {
4241 // Contended group defines the equivalence class over the fields:
4242 // the fields within the same contended group are not inter-padded.
4243 // The only exception is default group, which does not incur the
4244 // equivalence, and so requires intra-padding.
4245 next_nonstatic_padded_offset += ContendedPaddingWidth;
4246 }
4247
4248 fs.set_offset(real_offset);
4249 } // for
4250
4251 // Start laying out the next group.
4252 // Note that this will effectively pad the last group in the back;
4253 // this is expected to alleviate memory contention effects for
4254 // subclass fields and/or adjacent object.
4255 // If this was the default group, the padding is already in place.
4256 if (current_group != 0) {
4257 next_nonstatic_padded_offset += ContendedPaddingWidth;
4258 }
4259 }
4260
4261 // handle static fields
4262 }
4263
4264 // Entire class is contended, pad in the back.
4265 // This helps to alleviate memory contention effects for subclass fields
4266 // and/or adjacent object.
4267 if (is_contended_class) {
4268 next_nonstatic_padded_offset += ContendedPaddingWidth;
4269 }
4270
4271 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4272
4273 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, heapOopSize);
4274 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4275 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4276
4277 int static_field_size = (static_fields_end -
4278 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4279 nonstatic_field_size = nonstatic_field_size +
4280 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4281
4282 int instance_size = align_object_size(instance_end / wordSize);
4283
4284 assert(instance_size == align_object_size(align_up(
4285 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4286 wordSize) / wordSize), "consistent layout helper value");
4287
4288 // Invariant: nonstatic_field end/start should only change if there are
4289 // nonstatic fields in the class, or if the class is contended. We compare
4290 // against the non-aligned value, so that end alignment will not fail the
4291 // assert without actually having the fields.
4292 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4293 is_contended_class ||
4294 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4295
4296 // Number of non-static oop map blocks allocated at end of klass.
4297 const unsigned int total_oop_map_count =
4298 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4299 first_nonstatic_oop_offset);
4300
4301 #ifndef PRODUCT
4302 if (PrintFieldLayout) {
4303 print_field_layout(_class_name,
4304 _fields,
4305 cp,
4306 instance_size,
4307 nonstatic_fields_start,
4308 nonstatic_fields_end,
4309 static_fields_end);
4310 }
4311
4312 #endif
4313 // Pass back information needed for InstanceKlass creation
4314 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4315 info->nonstatic_oop_counts = nonstatic_oop_counts;
4316 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4317 info->total_oop_map_count = total_oop_map_count;
4318 info->instance_size = instance_size;
4319 info->static_field_size = static_field_size;
4320 info->nonstatic_field_size = nonstatic_field_size;
4321 info->has_nonstatic_fields = has_nonstatic_fields;
4322 }
4323
4324 static void fill_oop_maps(const InstanceKlass* k,
4325 unsigned int nonstatic_oop_map_count,
4326 const int* nonstatic_oop_offsets,
4327 const unsigned int* nonstatic_oop_counts) {
4328
4329 assert(k != NULL, "invariant");
4330
4331 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4332 const InstanceKlass* const super = k->superklass();
4333 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4334 if (super_count > 0) {
4335 // Copy maps from superklass
4336 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4337 for (unsigned int i = 0; i < super_count; ++i) {
4338 *this_oop_map++ = *super_oop_map++;
4339 }
4340 }
4341
4342 if (nonstatic_oop_map_count > 0) {
4343 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4344 // The counts differ because there is no gap between superklass's last oop
4345 // field and the first local oop field. Extend the last oop map copied
4346 // from the superklass instead of creating new one.
4347 nonstatic_oop_map_count--;
4348 nonstatic_oop_offsets++;
4349 this_oop_map--;
4350 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4351 this_oop_map++;
4352 }
4353
4354 // Add new map blocks, fill them
4355 while (nonstatic_oop_map_count-- > 0) {
4356 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4357 this_oop_map->set_count(*nonstatic_oop_counts++);
4358 this_oop_map++;
4359 }
4360 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4361 this_oop_map, "sanity");
4362 }
4363 }
4364
4365
4366 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4367 assert(ik != NULL, "invariant");
4368
4369 const Klass* const super = ik->super();
4370
4371 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4372 // in which case we don't have to register objects as finalizable
4373 if (!_has_empty_finalizer) {
4374 if (_has_finalizer ||
4375 (super != NULL && super->has_finalizer())) {
4376 ik->set_has_finalizer();
4377 }
4378 }
4379
4380 #ifdef ASSERT
4381 bool f = false;
4382 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4383 vmSymbols::void_method_signature());
4384 if (m != NULL && !m->is_empty_method()) {
4385 f = true;
4386 }
4387
4388 // Spec doesn't prevent agent from redefinition of empty finalizer.
4389 // Despite the fact that it's generally bad idea and redefined finalizer
4390 // will not work as expected we shouldn't abort vm in this case
4391 if (!ik->has_redefined_this_or_super()) {
4392 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4393 }
4394 #endif
4395
4396 // Check if this klass supports the java.lang.Cloneable interface
4397 if (SystemDictionary::Cloneable_klass_loaded()) {
4398 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4399 ik->set_is_cloneable();
4400 }
4401 }
4402
4403 // Check if this klass has a vanilla default constructor
4404 if (super == NULL) {
4405 // java.lang.Object has empty default constructor
4406 ik->set_has_vanilla_constructor();
4407 } else {
4408 if (super->has_vanilla_constructor() &&
4409 _has_vanilla_constructor) {
4410 ik->set_has_vanilla_constructor();
4411 }
4412 #ifdef ASSERT
4413 bool v = false;
4414 if (super->has_vanilla_constructor()) {
4415 const Method* const constructor =
4416 ik->find_method(vmSymbols::object_initializer_name(),
4417 vmSymbols::void_method_signature());
4418 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4419 v = true;
4420 }
4421 }
4422 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4423 #endif
4424 }
4425
4426 // If it cannot be fast-path allocated, set a bit in the layout helper.
4427 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4428 assert(ik->size_helper() > 0, "layout_helper is initialized");
4429 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4430 || ik->is_abstract() || ik->is_interface()
4431 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4432 || ik->size_helper() >= FastAllocateSizeLimit) {
4433 // Forbid fast-path allocation.
4434 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4435 ik->set_layout_helper(lh);
4436 }
4437 }
4438
4439 // utility methods for appending an array with check for duplicates
4440
4441 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4442 const Array<InstanceKlass*>* const ifs) {
4443 // iterate over new interfaces
4444 for (int i = 0; i < ifs->length(); i++) {
4445 InstanceKlass* const e = ifs->at(i);
4446 assert(e->is_klass() && e->is_interface(), "just checking");
4447 // add new interface
4448 result->append_if_missing(e);
4449 }
4450 }
4451
4452 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4453 Array<InstanceKlass*>* local_ifs,
4454 ClassLoaderData* loader_data,
4455 TRAPS) {
4456 assert(local_ifs != NULL, "invariant");
4457 assert(loader_data != NULL, "invariant");
4458
4459 // Compute maximum size for transitive interfaces
4460 int max_transitive_size = 0;
4461 int super_size = 0;
4462 // Add superclass transitive interfaces size
4463 if (super != NULL) {
4464 super_size = super->transitive_interfaces()->length();
4465 max_transitive_size += super_size;
4466 }
4467 // Add local interfaces' super interfaces
4468 const int local_size = local_ifs->length();
4469 for (int i = 0; i < local_size; i++) {
4470 InstanceKlass* const l = local_ifs->at(i);
4471 max_transitive_size += l->transitive_interfaces()->length();
4472 }
4473 // Finally add local interfaces
4474 max_transitive_size += local_size;
4475 // Construct array
4476 if (max_transitive_size == 0) {
4477 // no interfaces, use canonicalized array
4478 return Universe::the_empty_instance_klass_array();
4479 } else if (max_transitive_size == super_size) {
4480 // no new local interfaces added, share superklass' transitive interface array
4481 return super->transitive_interfaces();
4482 } else if (max_transitive_size == local_size) {
4483 // only local interfaces added, share local interface array
4484 return local_ifs;
4485 } else {
4486 ResourceMark rm;
4487 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4488
4489 // Copy down from superclass
4490 if (super != NULL) {
4491 append_interfaces(result, super->transitive_interfaces());
4492 }
4493
4494 // Copy down from local interfaces' superinterfaces
4495 for (int i = 0; i < local_size; i++) {
4496 InstanceKlass* const l = local_ifs->at(i);
4497 append_interfaces(result, l->transitive_interfaces());
4498 }
4499 // Finally add local interfaces
4500 append_interfaces(result, local_ifs);
4501
4502 // length will be less than the max_transitive_size if duplicates were removed
4503 const int length = result->length();
4504 assert(length <= max_transitive_size, "just checking");
4505 Array<InstanceKlass*>* const new_result =
4506 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4507 for (int i = 0; i < length; i++) {
4508 InstanceKlass* const e = result->at(i);
4509 assert(e != NULL, "just checking");
4510 new_result->at_put(i, e);
4511 }
4512 return new_result;
4513 }
4514 }
4515
4516 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4517 assert(this_klass != NULL, "invariant");
4518 const Klass* const super = this_klass->super();
4519 if (super != NULL) {
4520
4521 // If the loader is not the boot loader then throw an exception if its
4522 // superclass is in package jdk.internal.reflect and its loader is not a
4523 // special reflection class loader
4524 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4525 assert(super->is_instance_klass(), "super is not instance klass");
4526 PackageEntry* super_package = super->package();
4527 if (super_package != NULL &&
4528 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4529 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4530 ResourceMark rm(THREAD);
4531 Exceptions::fthrow(
4532 THREAD_AND_LOCATION,
4533 vmSymbols::java_lang_IllegalAccessError(),
4534 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4535 this_klass->external_name(),
4536 this_klass->class_loader_data()->loader_name_and_id(),
4537 super->external_name());
4538 return;
4539 }
4540 }
4541
4542 Reflection::VerifyClassAccessResults vca_result =
4543 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4544 if (vca_result != Reflection::ACCESS_OK) {
4545 ResourceMark rm(THREAD);
4546 char* msg = Reflection::verify_class_access_msg(this_klass,
4547 InstanceKlass::cast(super),
4548 vca_result);
4549 if (msg == NULL) {
4550 bool same_module = (this_klass->module() == super->module());
4551 Exceptions::fthrow(
4552 THREAD_AND_LOCATION,
4553 vmSymbols::java_lang_IllegalAccessError(),
4554 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4555 this_klass->external_name(),
4556 super->is_abstract() ? "abstract " : "",
4557 super->external_name(),
4558 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4559 (same_module) ? "" : "; ",
4560 (same_module) ? "" : super->class_in_module_of_loader());
4561 } else {
4562 // Add additional message content.
4563 Exceptions::fthrow(
4564 THREAD_AND_LOCATION,
4565 vmSymbols::java_lang_IllegalAccessError(),
4566 "superclass access check failed: %s",
4567 msg);
4568 }
4569 }
4570 }
4571 }
4572
4573
4574 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4575 assert(this_klass != NULL, "invariant");
4576 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4577 const int lng = local_interfaces->length();
4578 for (int i = lng - 1; i >= 0; i--) {
4579 InstanceKlass* const k = local_interfaces->at(i);
4580 assert (k != NULL && k->is_interface(), "invalid interface");
4581 Reflection::VerifyClassAccessResults vca_result =
4582 Reflection::verify_class_access(this_klass, k, false);
4583 if (vca_result != Reflection::ACCESS_OK) {
4584 ResourceMark rm(THREAD);
4585 char* msg = Reflection::verify_class_access_msg(this_klass,
4586 k,
4587 vca_result);
4588 if (msg == NULL) {
4589 bool same_module = (this_klass->module() == k->module());
4590 Exceptions::fthrow(
4591 THREAD_AND_LOCATION,
4592 vmSymbols::java_lang_IllegalAccessError(),
4593 "class %s cannot access its superinterface %s (%s%s%s)",
4594 this_klass->external_name(),
4595 k->external_name(),
4596 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4597 (same_module) ? "" : "; ",
4598 (same_module) ? "" : k->class_in_module_of_loader());
4599 } else {
4600 // Add additional message content.
4601 Exceptions::fthrow(
4602 THREAD_AND_LOCATION,
4603 vmSymbols::java_lang_IllegalAccessError(),
4604 "superinterface check failed: %s",
4605 msg);
4606 }
4607 }
4608 }
4609 }
4610
4611
4612 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4613 assert(this_klass != NULL, "invariant");
4614 const Array<Method*>* const methods = this_klass->methods();
4615 const int num_methods = methods->length();
4616
4617 // go thru each method and check if it overrides a final method
4618 for (int index = 0; index < num_methods; index++) {
4619 const Method* const m = methods->at(index);
4620
4621 // skip private, static, and <init> methods
4622 if ((!m->is_private() && !m->is_static()) &&
4623 (m->name() != vmSymbols::object_initializer_name())) {
4624
4625 const Symbol* const name = m->name();
4626 const Symbol* const signature = m->signature();
4627 const Klass* k = this_klass->super();
4628 const Method* super_m = NULL;
4629 while (k != NULL) {
4630 // skip supers that don't have final methods.
4631 if (k->has_final_method()) {
4632 // lookup a matching method in the super class hierarchy
4633 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4634 if (super_m == NULL) {
4635 break; // didn't find any match; get out
4636 }
4637
4638 if (super_m->is_final() && !super_m->is_static() &&
4639 !super_m->access_flags().is_private()) {
4640 // matching method in super is final, and not static or private
4641 bool can_access = Reflection::verify_member_access(this_klass,
4642 super_m->method_holder(),
4643 super_m->method_holder(),
4644 super_m->access_flags(),
4645 false, false, CHECK);
4646 if (can_access) {
4647 // this class can access super final method and therefore override
4648 ResourceMark rm(THREAD);
4649 Exceptions::fthrow(THREAD_AND_LOCATION,
4650 vmSymbols::java_lang_VerifyError(),
4651 "class %s overrides final method %s.%s%s",
4652 this_klass->external_name(),
4653 super_m->method_holder()->external_name(),
4654 name->as_C_string(),
4655 signature->as_C_string()
4656 );
4657 return;
4658 }
4659 }
4660
4661 // continue to look from super_m's holder's super.
4662 k = super_m->method_holder()->super();
4663 continue;
4664 }
4665
4666 k = k->super();
4667 }
4668 }
4669 }
4670 }
4671
4672
4673 // assumes that this_klass is an interface
4674 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4675 assert(this_klass != NULL, "invariant");
4676 assert(this_klass->is_interface(), "not an interface");
4677 const Array<Method*>* methods = this_klass->methods();
4678 const int num_methods = methods->length();
4679
4680 for (int index = 0; index < num_methods; index++) {
4681 const Method* const m = methods->at(index);
4682 // if m is static and not the init method, throw a verify error
4683 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4684 ResourceMark rm(THREAD);
4685 Exceptions::fthrow(
4686 THREAD_AND_LOCATION,
4687 vmSymbols::java_lang_VerifyError(),
4688 "Illegal static method %s in interface %s",
4689 m->name()->as_C_string(),
4690 this_klass->external_name()
4691 );
4692 return;
4693 }
4694 }
4695 }
4696
4697 // utility methods for format checking
4698
4699 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4700 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4701 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4702 if (is_module) {
4703 ResourceMark rm(THREAD);
4704 Exceptions::fthrow(
4705 THREAD_AND_LOCATION,
4706 vmSymbols::java_lang_NoClassDefFoundError(),
4707 "%s is not a class because access_flag ACC_MODULE is set",
4708 _class_name->as_C_string());
4709 return;
4710 }
4711
4712 if (!_need_verify) { return; }
4713
4714 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4715 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4716 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4717 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4718 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4719 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4720 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4721
4722 if ((is_abstract && is_final) ||
4723 (is_interface && !is_abstract) ||
4724 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4725 (!is_interface && major_gte_15 && is_annotation)) {
4726 ResourceMark rm(THREAD);
4727 Exceptions::fthrow(
4728 THREAD_AND_LOCATION,
4729 vmSymbols::java_lang_ClassFormatError(),
4730 "Illegal class modifiers in class %s: 0x%X",
4731 _class_name->as_C_string(), flags
4732 );
4733 return;
4734 }
4735 }
4736
4737 static bool has_illegal_visibility(jint flags) {
4738 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4739 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4740 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4741
4742 return ((is_public && is_protected) ||
4743 (is_public && is_private) ||
4744 (is_protected && is_private));
4745 }
4746
4747 // A legal major_version.minor_version must be one of the following:
4748 //
4749 // Major_version >= 45 and major_version < 56, any minor_version.
4750 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4751 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4752 //
4753 static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4754 ResourceMark rm(THREAD);
4755 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4756 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4757 Exceptions::fthrow(
4758 THREAD_AND_LOCATION,
4759 vmSymbols::java_lang_UnsupportedClassVersionError(),
4760 "%s (class file version %u.%u) was compiled with an invalid major version",
4761 class_name->as_C_string(), major, minor);
4762 return;
4763 }
4764
4765 if (major > max_version) {
4766 Exceptions::fthrow(
4767 THREAD_AND_LOCATION,
4768 vmSymbols::java_lang_UnsupportedClassVersionError(),
4769 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4770 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4771 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4772 return;
4773 }
4774
4775 if (major < JAVA_12_VERSION || minor == 0) {
4776 return;
4777 }
4778
4779 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4780 if (major != max_version) {
4781 Exceptions::fthrow(
4782 THREAD_AND_LOCATION,
4783 vmSymbols::java_lang_UnsupportedClassVersionError(),
4784 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4785 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4786 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4787 return;
4788 }
4789
4790 if (!Arguments::enable_preview()) {
4791 Exceptions::fthrow(
4792 THREAD_AND_LOCATION,
4793 vmSymbols::java_lang_UnsupportedClassVersionError(),
4794 "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4795 class_name->as_C_string(), major, minor);
4796 return;
4797 }
4798
4799 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4800 Exceptions::fthrow(
4801 THREAD_AND_LOCATION,
4802 vmSymbols::java_lang_UnsupportedClassVersionError(),
4803 "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4804 class_name->as_C_string(), major, minor);
4805 }
4806 }
4807
4808 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4809 bool is_interface,
4810 TRAPS) const {
4811 if (!_need_verify) { return; }
4812
4813 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4814 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4815 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4816 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4817 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4818 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4819 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4820 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4821 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4822
4823 bool is_illegal = false;
4824
4825 if (is_interface) {
4826 if (!is_public || !is_static || !is_final || is_private ||
4827 is_protected || is_volatile || is_transient ||
4828 (major_gte_15 && is_enum)) {
4829 is_illegal = true;
4830 }
4831 } else { // not interface
4832 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4833 is_illegal = true;
4834 }
4835 }
4836
4837 if (is_illegal) {
4838 ResourceMark rm(THREAD);
4839 Exceptions::fthrow(
4840 THREAD_AND_LOCATION,
4841 vmSymbols::java_lang_ClassFormatError(),
4842 "Illegal field modifiers in class %s: 0x%X",
4843 _class_name->as_C_string(), flags);
4844 return;
4845 }
4846 }
4847
4848 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4849 bool is_interface,
4850 const Symbol* name,
4851 TRAPS) const {
4852 if (!_need_verify) { return; }
4853
4854 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4855 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4856 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4857 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4858 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4859 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4860 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4861 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4862 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4863 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4864 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4865 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4866 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4867
4868 bool is_illegal = false;
4869
4870 if (is_interface) {
4871 if (major_gte_8) {
4872 // Class file version is JAVA_8_VERSION or later Methods of
4873 // interfaces may set any of the flags except ACC_PROTECTED,
4874 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4875 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4876 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4877 (is_native || is_protected || is_final || is_synchronized) ||
4878 // If a specific method of a class or interface has its
4879 // ACC_ABSTRACT flag set, it must not have any of its
4880 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4881 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4882 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4883 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4884 (is_abstract && (is_private || is_static || is_strict))) {
4885 is_illegal = true;
4886 }
4887 } else if (major_gte_15) {
4888 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4889 if (!is_public || is_private || is_protected || is_static || is_final ||
4890 is_synchronized || is_native || !is_abstract || is_strict) {
4891 is_illegal = true;
4892 }
4893 } else {
4894 // Class file version is pre-JAVA_1_5_VERSION
4895 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4896 is_illegal = true;
4897 }
4898 }
4899 } else { // not interface
4900 if (has_illegal_visibility(flags)) {
4901 is_illegal = true;
4902 } else {
4903 if (is_initializer) {
4904 if (is_static || is_final || is_synchronized || is_native ||
4905 is_abstract || (major_gte_15 && is_bridge)) {
4906 is_illegal = true;
4907 }
4908 } else { // not initializer
4909 if (is_abstract) {
4910 if ((is_final || is_native || is_private || is_static ||
4911 (major_gte_15 && (is_synchronized || is_strict)))) {
4912 is_illegal = true;
4913 }
4914 }
4915 }
4916 }
4917 }
4918
4919 if (is_illegal) {
4920 ResourceMark rm(THREAD);
4921 Exceptions::fthrow(
4922 THREAD_AND_LOCATION,
4923 vmSymbols::java_lang_ClassFormatError(),
4924 "Method %s in class %s has illegal modifiers: 0x%X",
4925 name->as_C_string(), _class_name->as_C_string(), flags);
4926 return;
4927 }
4928 }
4929
4930 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4931 int length,
4932 TRAPS) const {
4933 assert(_need_verify, "only called when _need_verify is true");
4934 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4935 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4936 }
4937 }
4938
4939 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4940 // In class names, '/' separates unqualified names. This is verified in this function also.
4941 // Method names also may not contain the characters '<' or '>', unless <init>
4942 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4943 // method. Because these names have been checked as special cases before
4944 // calling this method in verify_legal_method_name.
4945 //
4946 // This method is also called from the modular system APIs in modules.cpp
4947 // to verify the validity of module and package names.
4948 bool ClassFileParser::verify_unqualified_name(const char* name,
4949 unsigned int length,
4950 int type) {
4951 if (length == 0) return false; // Must have at least one char.
4952 for (const char* p = name; p != name + length; p++) {
4953 switch(*p) {
4954 case JVM_SIGNATURE_DOT:
4955 case JVM_SIGNATURE_ENDCLASS:
4956 case JVM_SIGNATURE_ARRAY:
4957 // do not permit '.', ';', or '['
4958 return false;
4959 case JVM_SIGNATURE_SLASH:
4960 // check for '//' or leading or trailing '/' which are not legal
4961 // unqualified name must not be empty
4962 if (type == ClassFileParser::LegalClass) {
4963 if (p == name || p+1 >= name+length ||
4964 *(p+1) == JVM_SIGNATURE_SLASH) {
4965 return false;
4966 }
4967 } else {
4968 return false; // do not permit '/' unless it's class name
4969 }
4970 break;
4971 case JVM_SIGNATURE_SPECIAL:
4972 case JVM_SIGNATURE_ENDSPECIAL:
4973 // do not permit '<' or '>' in method names
4974 if (type == ClassFileParser::LegalMethod) {
4975 return false;
4976 }
4977 }
4978 }
4979 return true;
4980 }
4981
4982 // Take pointer to a UTF8 byte string (not NUL-terminated).
4983 // Skip over the longest part of the string that could
4984 // be taken as a fieldname. Allow '/' if slash_ok is true.
4985 // Return a pointer to just past the fieldname.
4986 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4987 // being true, we saw consecutive slashes (meaning we were looking for a
4988 // qualified path but found something that was badly-formed).
4989 static const char* skip_over_field_name(const char* const name,
4990 bool slash_ok,
4991 unsigned int length) {
4992 const char* p;
4993 jboolean last_is_slash = false;
4994 jboolean not_first_ch = false;
4995
4996 for (p = name; p != name + length; not_first_ch = true) {
4997 const char* old_p = p;
4998 jchar ch = *p;
4999 if (ch < 128) {
5000 p++;
5001 // quick check for ascii
5002 if ((ch >= 'a' && ch <= 'z') ||
5003 (ch >= 'A' && ch <= 'Z') ||
5004 (ch == '_' || ch == '$') ||
5005 (not_first_ch && ch >= '0' && ch <= '9')) {
5006 last_is_slash = false;
5007 continue;
5008 }
5009 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
5010 if (last_is_slash) {
5011 return NULL; // Don't permit consecutive slashes
5012 }
5013 last_is_slash = true;
5014 continue;
5015 }
5016 }
5017 else {
5018 jint unicode_ch;
5019 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5020 p = tmp_p;
5021 last_is_slash = false;
5022 // Check if ch is Java identifier start or is Java identifier part
5023 // 4672820: call java.lang.Character methods directly without generating separate tables.
5024 EXCEPTION_MARK;
5025 // return value
5026 JavaValue result(T_BOOLEAN);
5027 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5028 JavaCallArguments args;
5029 args.push_int(unicode_ch);
5030
5031 if (not_first_ch) {
5032 // public static boolean isJavaIdentifierPart(char ch);
5033 JavaCalls::call_static(&result,
5034 SystemDictionary::Character_klass(),
5035 vmSymbols::isJavaIdentifierPart_name(),
5036 vmSymbols::int_bool_signature(),
5037 &args,
5038 THREAD);
5039 } else {
5040 // public static boolean isJavaIdentifierStart(char ch);
5041 JavaCalls::call_static(&result,
5042 SystemDictionary::Character_klass(),
5043 vmSymbols::isJavaIdentifierStart_name(),
5044 vmSymbols::int_bool_signature(),
5045 &args,
5046 THREAD);
5047 }
5048 if (HAS_PENDING_EXCEPTION) {
5049 CLEAR_PENDING_EXCEPTION;
5050 return NULL;
5051 }
5052 if(result.get_jboolean()) {
5053 continue;
5054 }
5055 }
5056 return (not_first_ch) ? old_p : NULL;
5057 }
5058 return (not_first_ch) ? p : NULL;
5059 }
5060
5061 // Take pointer to a UTF8 byte string (not NUL-terminated).
5062 // Skip over the longest part of the string that could
5063 // be taken as a field signature. Allow "void" if void_ok.
5064 // Return a pointer to just past the signature.
5065 // Return NULL if no legal signature is found.
5066 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5067 bool void_ok,
5068 unsigned int length,
5069 TRAPS) const {
5070 unsigned int array_dim = 0;
5071 while (length > 0) {
5072 switch (signature[0]) {
5073 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5074 case JVM_SIGNATURE_BOOLEAN:
5075 case JVM_SIGNATURE_BYTE:
5076 case JVM_SIGNATURE_CHAR:
5077 case JVM_SIGNATURE_SHORT:
5078 case JVM_SIGNATURE_INT:
5079 case JVM_SIGNATURE_FLOAT:
5080 case JVM_SIGNATURE_LONG:
5081 case JVM_SIGNATURE_DOUBLE:
5082 return signature + 1;
5083 case JVM_SIGNATURE_CLASS: {
5084 if (_major_version < JAVA_1_5_VERSION) {
5085 // Skip over the class name if one is there
5086 const char* const p = skip_over_field_name(signature + 1, true, --length);
5087
5088 // The next character better be a semicolon
5089 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
5090 return p + 1;
5091 }
5092 }
5093 else {
5094 // Skip leading 'L' and ignore first appearance of ';'
5095 signature++;
5096 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
5097 // Format check signature
5098 if (c != NULL) {
5099 int newlen = c - (char*) signature;
5100 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5101 if (!legal) {
5102 classfile_parse_error("Class name is empty or contains illegal character "
5103 "in descriptor in class file %s",
5104 CHECK_0);
5105 return NULL;
5106 }
5107 return signature + newlen + 1;
5108 }
5109 }
5110 return NULL;
5111 }
5112 case JVM_SIGNATURE_ARRAY:
5113 array_dim++;
5114 if (array_dim > 255) {
5115 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5116 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5117 }
5118 // The rest of what's there better be a legal signature
5119 signature++;
5120 length--;
5121 void_ok = false;
5122 break;
5123 default:
5124 return NULL;
5125 }
5126 }
5127 return NULL;
5128 }
5129
5130 // Checks if name is a legal class name.
5131 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5132 if (!_need_verify || _relax_verify) { return; }
5133
5134 assert(name->refcount() > 0, "symbol must be kept alive");
5135 char* bytes = (char*)name->bytes();
5136 unsigned int length = name->utf8_length();
5137 bool legal = false;
5138
5139 if (length > 0) {
5140 const char* p;
5141 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5142 p = skip_over_field_signature(bytes, false, length, CHECK);
5143 legal = (p != NULL) && ((p - bytes) == (int)length);
5144 } else if (_major_version < JAVA_1_5_VERSION) {
5145 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5146 p = skip_over_field_name(bytes, true, length);
5147 legal = (p != NULL) && ((p - bytes) == (int)length);
5148 }
5149 } else {
5150 // 4900761: relax the constraints based on JSR202 spec
5151 // Class names may be drawn from the entire Unicode character set.
5152 // Identifiers between '/' must be unqualified names.
5153 // The utf8 string has been verified when parsing cpool entries.
5154 legal = verify_unqualified_name(bytes, length, LegalClass);
5155 }
5156 }
5157 if (!legal) {
5158 ResourceMark rm(THREAD);
5159 assert(_class_name != NULL, "invariant");
5160 Exceptions::fthrow(
5161 THREAD_AND_LOCATION,
5162 vmSymbols::java_lang_ClassFormatError(),
5163 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5164 _class_name->as_C_string()
5165 );
5166 return;
5167 }
5168 }
5169
5170 // Checks if name is a legal field name.
5171 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5172 if (!_need_verify || _relax_verify) { return; }
5173
5174 char* bytes = (char*)name->bytes();
5175 unsigned int length = name->utf8_length();
5176 bool legal = false;
5177
5178 if (length > 0) {
5179 if (_major_version < JAVA_1_5_VERSION) {
5180 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5181 const char* p = skip_over_field_name(bytes, false, length);
5182 legal = (p != NULL) && ((p - bytes) == (int)length);
5183 }
5184 } else {
5185 // 4881221: relax the constraints based on JSR202 spec
5186 legal = verify_unqualified_name(bytes, length, LegalField);
5187 }
5188 }
5189
5190 if (!legal) {
5191 ResourceMark rm(THREAD);
5192 assert(_class_name != NULL, "invariant");
5193 Exceptions::fthrow(
5194 THREAD_AND_LOCATION,
5195 vmSymbols::java_lang_ClassFormatError(),
5196 "Illegal field name \"%.*s\" in class %s", length, bytes,
5197 _class_name->as_C_string()
5198 );
5199 return;
5200 }
5201 }
5202
5203 // Checks if name is a legal method name.
5204 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5205 if (!_need_verify || _relax_verify) { return; }
5206
5207 assert(name != NULL, "method name is null");
5208 char* bytes = (char*)name->bytes();
5209 unsigned int length = name->utf8_length();
5210 bool legal = false;
5211
5212 if (length > 0) {
5213 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
5214 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5215 legal = true;
5216 }
5217 } else if (_major_version < JAVA_1_5_VERSION) {
5218 const char* p;
5219 p = skip_over_field_name(bytes, false, length);
5220 legal = (p != NULL) && ((p - bytes) == (int)length);
5221 } else {
5222 // 4881221: relax the constraints based on JSR202 spec
5223 legal = verify_unqualified_name(bytes, length, LegalMethod);
5224 }
5225 }
5226
5227 if (!legal) {
5228 ResourceMark rm(THREAD);
5229 assert(_class_name != NULL, "invariant");
5230 Exceptions::fthrow(
5231 THREAD_AND_LOCATION,
5232 vmSymbols::java_lang_ClassFormatError(),
5233 "Illegal method name \"%.*s\" in class %s", length, bytes,
5234 _class_name->as_C_string()
5235 );
5236 return;
5237 }
5238 }
5239
5240
5241 // Checks if signature is a legal field signature.
5242 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5243 const Symbol* signature,
5244 TRAPS) const {
5245 if (!_need_verify) { return; }
5246
5247 const char* const bytes = (const char* const)signature->bytes();
5248 const unsigned int length = signature->utf8_length();
5249 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5250
5251 if (p == NULL || (p - bytes) != (int)length) {
5252 throwIllegalSignature("Field", name, signature, CHECK);
5253 }
5254 }
5255
5256 // Checks if signature is a legal method signature.
5257 // Returns number of parameters
5258 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5259 const Symbol* signature,
5260 TRAPS) const {
5261 if (!_need_verify) {
5262 // make sure caller's args_size will be less than 0 even for non-static
5263 // method so it will be recomputed in compute_size_of_parameters().
5264 return -2;
5265 }
5266
5267 // Class initializers cannot have args for class format version >= 51.
5268 if (name == vmSymbols::class_initializer_name() &&
5269 signature != vmSymbols::void_method_signature() &&
5270 _major_version >= JAVA_7_VERSION) {
5271 throwIllegalSignature("Method", name, signature, CHECK_0);
5272 return 0;
5273 }
5274
5275 unsigned int args_size = 0;
5276 const char* p = (const char*)signature->bytes();
5277 unsigned int length = signature->utf8_length();
5278 const char* nextp;
5279
5280 // The first character must be a '('
5281 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5282 length--;
5283 // Skip over legal field signatures
5284 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5285 while ((length > 0) && (nextp != NULL)) {
5286 args_size++;
5287 if (p[0] == 'J' || p[0] == 'D') {
5288 args_size++;
5289 }
5290 length -= nextp - p;
5291 p = nextp;
5292 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5293 }
5294 // The first non-signature thing better be a ')'
5295 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5296 length--;
5297 if (name->utf8_length() > 0 && name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
5298 // All internal methods must return void
5299 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5300 return args_size;
5301 }
5302 } else {
5303 // Now we better just have a return value
5304 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5305 if (nextp && ((int)length == (nextp - p))) {
5306 return args_size;
5307 }
5308 }
5309 }
5310 }
5311 // Report error
5312 throwIllegalSignature("Method", name, signature, CHECK_0);
5313 return 0;
5314 }
5315
5316 int ClassFileParser::static_field_size() const {
5317 assert(_field_info != NULL, "invariant");
5318 return _field_info->static_field_size;
5319 }
5320
5321 int ClassFileParser::total_oop_map_count() const {
5322 assert(_field_info != NULL, "invariant");
5323 return _field_info->total_oop_map_count;
5324 }
5325
5326 jint ClassFileParser::layout_size() const {
5327 assert(_field_info != NULL, "invariant");
5328 return _field_info->instance_size;
5329 }
5330
5331 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5332 const Array<Method*>* methods) {
5333 assert(ik != NULL, "invariant");
5334 assert(methods != NULL, "invariant");
5335
5336 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5337 // (We used to do this lazily, but now we query it in Rewriter,
5338 // which is eagerly done for every method, so we might as well do it now,
5339 // when everything is fresh in memory.)
5340 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5341
5342 if (klass_id != vmSymbols::NO_SID) {
5343 for (int j = 0; j < methods->length(); ++j) {
5344 Method* method = methods->at(j);
5345 method->init_intrinsic_id();
5346
5347 if (CheckIntrinsics) {
5348 // Check if an intrinsic is defined for method 'method',
5349 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5350 if (method->intrinsic_id() != vmIntrinsics::_none &&
5351 !method->intrinsic_candidate()) {
5352 tty->print("Compiler intrinsic is defined for method [%s], "
5353 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5354 method->name_and_sig_as_C_string(),
5355 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5356 );
5357 tty->cr();
5358 DEBUG_ONLY(vm_exit(1));
5359 }
5360 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5361 // but there is no intrinsic available for it.
5362 if (method->intrinsic_candidate() &&
5363 method->intrinsic_id() == vmIntrinsics::_none) {
5364 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5365 "but no compiler intrinsic is defined for the method.%s",
5366 method->name_and_sig_as_C_string(),
5367 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5368 );
5369 tty->cr();
5370 DEBUG_ONLY(vm_exit(1));
5371 }
5372 }
5373 } // end for
5374
5375 #ifdef ASSERT
5376 if (CheckIntrinsics) {
5377 // Check for orphan methods in the current class. A method m
5378 // of a class C is orphan if an intrinsic is defined for method m,
5379 // but class C does not declare m.
5380 // The check is potentially expensive, therefore it is available
5381 // only in debug builds.
5382
5383 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5384 if (vmIntrinsics::_compiledLambdaForm == id) {
5385 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5386 // generated for the JVM from a LambdaForm and therefore no method
5387 // is defined for it.
5388 continue;
5389 }
5390
5391 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5392 // Check if the current class contains a method with the same
5393 // name, flags, signature.
5394 bool match = false;
5395 for (int j = 0; j < methods->length(); ++j) {
5396 const Method* method = methods->at(j);
5397 if (method->intrinsic_id() == id) {
5398 match = true;
5399 break;
5400 }
5401 }
5402
5403 if (!match) {
5404 char buf[1000];
5405 tty->print("Compiler intrinsic is defined for method [%s], "
5406 "but the method is not available in class [%s].%s",
5407 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5408 buf, sizeof(buf)),
5409 ik->name()->as_C_string(),
5410 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5411 );
5412 tty->cr();
5413 DEBUG_ONLY(vm_exit(1));
5414 }
5415 }
5416 } // end for
5417 } // CheckIntrinsics
5418 #endif // ASSERT
5419 }
5420 }
5421
5422 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5423 if (_klass != NULL) {
5424 return _klass;
5425 }
5426
5427 InstanceKlass* const ik =
5428 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5429
5430 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5431
5432 assert(_klass == ik, "invariant");
5433
5434
5435 if (ik->should_store_fingerprint()) {
5436 ik->store_fingerprint(_stream->compute_fingerprint());
5437 }
5438
5439 ik->set_has_passed_fingerprint_check(false);
5440 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5441 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5442 uint64_t fp = ik->has_stored_fingerprint() ? ik->get_stored_fingerprint() : _stream->compute_fingerprint();
5443 if (aot_fp != 0 && aot_fp == fp) {
5444 // This class matches with a class saved in an AOT library
5445 ik->set_has_passed_fingerprint_check(true);
5446 } else {
5447 ResourceMark rm;
5448 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5449 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5450 }
5451 }
5452
5453 return ik;
5454 }
5455
5456 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5457 assert(ik != NULL, "invariant");
5458
5459 // Set name and CLD before adding to CLD
5460 ik->set_class_loader_data(_loader_data);
5461 ik->set_name(_class_name);
5462
5463 // Add all classes to our internal class loader list here,
5464 // including classes in the bootstrap (NULL) class loader.
5465 const bool publicize = !is_internal();
5466
5467 _loader_data->add_class(ik, publicize);
5468
5469 set_klass_to_deallocate(ik);
5470
5471 assert(_field_info != NULL, "invariant");
5472 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5473 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5474 "sanity");
5475
5476 assert(ik->is_instance_klass(), "sanity");
5477 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5478
5479 // Fill in information already parsed
5480 ik->set_should_verify_class(_need_verify);
5481
5482 // Not yet: supers are done below to support the new subtype-checking fields
5483 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5484 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5485 assert(_fac != NULL, "invariant");
5486 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5487
5488 // this transfers ownership of a lot of arrays from
5489 // the parser onto the InstanceKlass*
5490 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5491
5492 // note that is not safe to use the fields in the parser from this point on
5493 assert(NULL == _cp, "invariant");
5494 assert(NULL == _fields, "invariant");
5495 assert(NULL == _methods, "invariant");
5496 assert(NULL == _inner_classes, "invariant");
5497 assert(NULL == _nest_members, "invariant");
5498 assert(NULL == _local_interfaces, "invariant");
5499 assert(NULL == _combined_annotations, "invariant");
5500
5501 if (_has_final_method) {
5502 ik->set_has_final_method();
5503 }
5504
5505 ik->copy_method_ordering(_method_ordering, CHECK);
5506 // The InstanceKlass::_methods_jmethod_ids cache
5507 // is managed on the assumption that the initial cache
5508 // size is equal to the number of methods in the class. If
5509 // that changes, then InstanceKlass::idnum_can_increment()
5510 // has to be changed accordingly.
5511 ik->set_initial_method_idnum(ik->methods()->length());
5512
5513 ik->set_this_class_index(_this_class_index);
5514
5515 if (is_unsafe_anonymous()) {
5516 // _this_class_index is a CONSTANT_Class entry that refers to this
5517 // anonymous class itself. If this class needs to refer to its own methods or
5518 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5519 // _this_class_index. However, because this class is anonymous (it's
5520 // not stored in SystemDictionary), _this_class_index cannot be resolved
5521 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5522 // Therefore, we must eagerly resolve _this_class_index now.
5523 ik->constants()->klass_at_put(_this_class_index, ik);
5524 }
5525
5526 ik->set_minor_version(_minor_version);
5527 ik->set_major_version(_major_version);
5528 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5529 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5530
5531 if (_unsafe_anonymous_host != NULL) {
5532 assert (ik->is_unsafe_anonymous(), "should be the same");
5533 ik->set_unsafe_anonymous_host(_unsafe_anonymous_host);
5534 }
5535
5536 // Set PackageEntry for this_klass
5537 oop cl = ik->class_loader();
5538 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5539 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5540 ik->set_package(cld, CHECK);
5541
5542 const Array<Method*>* const methods = ik->methods();
5543 assert(methods != NULL, "invariant");
5544 const int methods_len = methods->length();
5545
5546 check_methods_for_intrinsics(ik, methods);
5547
5548 // Fill in field values obtained by parse_classfile_attributes
5549 if (_parsed_annotations->has_any_annotations()) {
5550 _parsed_annotations->apply_to(ik);
5551 }
5552
5553 apply_parsed_class_attributes(ik);
5554
5555 // Miranda methods
5556 if ((_num_miranda_methods > 0) ||
5557 // if this class introduced new miranda methods or
5558 (_super_klass != NULL && _super_klass->has_miranda_methods())
5559 // super class exists and this class inherited miranda methods
5560 ) {
5561 ik->set_has_miranda_methods(); // then set a flag
5562 }
5563
5564 // Fill in information needed to compute superclasses.
5565 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5566 ik->set_transitive_interfaces(_transitive_interfaces);
5567 _transitive_interfaces = NULL;
5568
5569 // Initialize itable offset tables
5570 klassItable::setup_itable_offset_table(ik);
5571
5572 // Compute transitive closure of interfaces this class implements
5573 // Do final class setup
5574 fill_oop_maps(ik,
5575 _field_info->nonstatic_oop_map_count,
5576 _field_info->nonstatic_oop_offsets,
5577 _field_info->nonstatic_oop_counts);
5578
5579 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5580 set_precomputed_flags(ik);
5581
5582 // check if this class can access its super class
5583 check_super_class_access(ik, CHECK);
5584
5585 // check if this class can access its superinterfaces
5586 check_super_interface_access(ik, CHECK);
5587
5588 // check if this class overrides any final method
5589 check_final_method_override(ik, CHECK);
5590
5591 // reject static interface methods prior to Java 8
5592 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5593 check_illegal_static_method(ik, CHECK);
5594 }
5595
5596 // Obtain this_klass' module entry
5597 ModuleEntry* module_entry = ik->module();
5598 assert(module_entry != NULL, "module_entry should always be set");
5599
5600 // Obtain java.lang.Module
5601 Handle module_handle(THREAD, module_entry->module());
5602
5603 // Allocate mirror and initialize static fields
5604 // The create_mirror() call will also call compute_modifiers()
5605 java_lang_Class::create_mirror(ik,
5606 Handle(THREAD, _loader_data->class_loader()),
5607 module_handle,
5608 _protection_domain,
5609 CHECK);
5610
5611 assert(_all_mirandas != NULL, "invariant");
5612
5613 // Generate any default methods - default methods are public interface methods
5614 // that have a default implementation. This is new with Java 8.
5615 if (_has_nonstatic_concrete_methods) {
5616 DefaultMethods::generate_default_methods(ik,
5617 _all_mirandas,
5618 CHECK);
5619 }
5620
5621 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5622 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5623 !module_entry->has_default_read_edges()) {
5624 if (!module_entry->set_has_default_read_edges()) {
5625 // We won a potential race
5626 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5627 }
5628 }
5629
5630 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5631
5632 if (!is_internal()) {
5633 if (log_is_enabled(Info, class, load)) {
5634 ResourceMark rm;
5635 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5636 ik->print_class_load_logging(_loader_data, module_name, _stream);
5637 }
5638
5639 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5640 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5641 log_is_enabled(Info, class, preview)) {
5642 ResourceMark rm;
5643 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5644 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5645 }
5646
5647 if (log_is_enabled(Debug, class, resolve)) {
5648 ResourceMark rm;
5649 // print out the superclass.
5650 const char * from = ik->external_name();
5651 if (ik->java_super() != NULL) {
5652 log_debug(class, resolve)("%s %s (super)",
5653 from,
5654 ik->java_super()->external_name());
5655 }
5656 // print out each of the interface classes referred to by this class.
5657 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5658 if (local_interfaces != NULL) {
5659 const int length = local_interfaces->length();
5660 for (int i = 0; i < length; i++) {
5661 const InstanceKlass* const k = local_interfaces->at(i);
5662 const char * to = k->external_name();
5663 log_debug(class, resolve)("%s %s (interface)", from, to);
5664 }
5665 }
5666 }
5667 }
5668
5669 JFR_ONLY(INIT_ID(ik);)
5670
5671 // If we reach here, all is well.
5672 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5673 // in order for it to not be destroyed in the ClassFileParser destructor.
5674 set_klass_to_deallocate(NULL);
5675
5676 // it's official
5677 set_klass(ik);
5678
5679 debug_only(ik->verify();)
5680 }
5681
5682 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5683 // Decrement the refcount in the old name, since we're clobbering it.
5684 _class_name->decrement_refcount();
5685
5686 _class_name = new_class_name;
5687 // Increment the refcount of the new name.
5688 // Now the ClassFileParser owns this name and will decrement in
5689 // the destructor.
5690 _class_name->increment_refcount();
5691 }
5692
5693
5694 // For an unsafe anonymous class that is in the unnamed package, move it to its host class's
5695 // package by prepending its host class's package name to its class name and setting
5696 // its _class_name field.
5697 void ClassFileParser::prepend_host_package_name(const InstanceKlass* unsafe_anonymous_host, TRAPS) {
5698 ResourceMark rm(THREAD);
5699 assert(strrchr(_class_name->as_C_string(), JVM_SIGNATURE_SLASH) == NULL,
5700 "Unsafe anonymous class should not be in a package");
5701 const char* host_pkg_name =
5702 ClassLoader::package_from_name(unsafe_anonymous_host->name()->as_C_string(), NULL);
5703
5704 if (host_pkg_name != NULL) {
5705 int host_pkg_len = (int)strlen(host_pkg_name);
5706 int class_name_len = _class_name->utf8_length();
5707 int symbol_len = host_pkg_len + 1 + class_name_len;
5708 char* new_anon_name = NEW_RESOURCE_ARRAY(char, symbol_len + 1);
5709 int n = os::snprintf(new_anon_name, symbol_len + 1, "%s/%.*s",
5710 host_pkg_name, class_name_len, _class_name->base());
5711 assert(n == symbol_len, "Unexpected number of characters in string");
5712
5713 // Decrement old _class_name to avoid leaking.
5714 _class_name->decrement_refcount();
5715
5716 // Create a symbol and update the anonymous class name.
5717 // The new class name is created with a refcount of one. When installed into the InstanceKlass,
5718 // it'll be two and when the ClassFileParser destructor runs, it'll go back to one and get deleted
5719 // when the class is unloaded.
5720 _class_name = SymbolTable::new_symbol(new_anon_name, symbol_len);
5721 }
5722 }
5723
5724 // If the host class and the anonymous class are in the same package then do
5725 // nothing. If the anonymous class is in the unnamed package then move it to its
5726 // host's package. If the classes are in different packages then throw an IAE
5727 // exception.
5728 void ClassFileParser::fix_unsafe_anonymous_class_name(TRAPS) {
5729 assert(_unsafe_anonymous_host != NULL, "Expected an unsafe anonymous class");
5730
5731 const jbyte* anon_last_slash = UTF8::strrchr((const jbyte*)_class_name->base(),
5732 _class_name->utf8_length(), JVM_SIGNATURE_SLASH);
5733 if (anon_last_slash == NULL) { // Unnamed package
5734 prepend_host_package_name(_unsafe_anonymous_host, CHECK);
5735 } else {
5736 if (!_unsafe_anonymous_host->is_same_class_package(_unsafe_anonymous_host->class_loader(), _class_name)) {
5737 ResourceMark rm(THREAD);
5738 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5739 err_msg("Host class %s and anonymous class %s are in different packages",
5740 _unsafe_anonymous_host->name()->as_C_string(), _class_name->as_C_string()));
5741 }
5742 }
5743 }
5744
5745 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5746 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5747 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5748 bool need_verify =
5749 // verifyAll
5750 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5751 // verifyRemote
5752 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5753 return !need_verify;
5754 }
5755
5756 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5757 Symbol* name,
5758 ClassLoaderData* loader_data,
5759 Handle protection_domain,
5760 const InstanceKlass* unsafe_anonymous_host,
5761 GrowableArray<Handle>* cp_patches,
5762 Publicity pub_level,
5763 TRAPS) :
5764 _stream(stream),
5765 _requested_name(name),
5766 _class_name(NULL),
5767 _loader_data(loader_data),
5768 _unsafe_anonymous_host(unsafe_anonymous_host),
5769 _cp_patches(cp_patches),
5770 _num_patched_klasses(0),
5771 _max_num_patched_klasses(0),
5772 _orig_cp_size(0),
5773 _first_patched_klass_resolved_index(0),
5774 _super_klass(),
5775 _cp(NULL),
5776 _fields(NULL),
5777 _methods(NULL),
5778 _inner_classes(NULL),
5779 _nest_members(NULL),
5780 _nest_host(0),
5781 _local_interfaces(NULL),
5782 _transitive_interfaces(NULL),
5783 _combined_annotations(NULL),
5784 _class_annotations(NULL),
5785 _class_type_annotations(NULL),
5786 _fields_annotations(NULL),
5787 _fields_type_annotations(NULL),
5788 _klass(NULL),
5789 _klass_to_deallocate(NULL),
5790 _parsed_annotations(NULL),
5791 _fac(NULL),
5792 _field_info(NULL),
5793 _method_ordering(NULL),
5794 _all_mirandas(NULL),
5795 _vtable_size(0),
5796 _itable_size(0),
5797 _num_miranda_methods(0),
5798 _rt(REF_NONE),
5799 _protection_domain(protection_domain),
5800 _access_flags(),
5801 _pub_level(pub_level),
5802 _bad_constant_seen(0),
5803 _synthetic_flag(false),
5804 _sde_length(false),
5805 _sde_buffer(NULL),
5806 _sourcefile_index(0),
5807 _generic_signature_index(0),
5808 _major_version(0),
5809 _minor_version(0),
5810 _this_class_index(0),
5811 _super_class_index(0),
5812 _itfs_len(0),
5813 _java_fields_count(0),
5814 _need_verify(false),
5815 _relax_verify(false),
5816 _has_nonstatic_concrete_methods(false),
5817 _declares_nonstatic_concrete_methods(false),
5818 _has_final_method(false),
5819 _has_finalizer(false),
5820 _has_empty_finalizer(false),
5821 _has_vanilla_constructor(false),
5822 _max_bootstrap_specifier_index(-1) {
5823
5824 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5825 _class_name->increment_refcount();
5826
5827 assert(THREAD->is_Java_thread(), "invariant");
5828 assert(_loader_data != NULL, "invariant");
5829 assert(stream != NULL, "invariant");
5830 assert(_stream != NULL, "invariant");
5831 assert(_stream->buffer() == _stream->current(), "invariant");
5832 assert(_class_name != NULL, "invariant");
5833 assert(0 == _access_flags.as_int(), "invariant");
5834
5835 // Figure out whether we can skip format checking (matching classic VM behavior)
5836 if (DumpSharedSpaces) {
5837 // verify == true means it's a 'remote' class (i.e., non-boot class)
5838 // Verification decision is based on BytecodeVerificationRemote flag
5839 // for those classes.
5840 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5841 BytecodeVerificationLocal;
5842 }
5843 else {
5844 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5845 stream->need_verify());
5846 }
5847 if (_cp_patches != NULL) {
5848 int len = _cp_patches->length();
5849 for (int i=0; i<len; i++) {
5850 if (has_cp_patch_at(i)) {
5851 Handle patch = cp_patch_at(i);
5852 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5853 // We need to append the names of the patched classes to the end of the constant pool,
5854 // because a patched class may have a Utf8 name that's not already included in the
5855 // original constant pool. These class names are used when patch_constant_pool()
5856 // calls patch_class().
5857 //
5858 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5859 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5860 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5861 _max_num_patched_klasses++;
5862 }
5863 }
5864 }
5865 }
5866
5867 // synch back verification state to stream
5868 stream->set_verify(_need_verify);
5869
5870 // Check if verification needs to be relaxed for this class file
5871 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5872 _relax_verify = relax_format_check_for(_loader_data);
5873
5874 parse_stream(stream, CHECK);
5875
5876 post_process_parsed_stream(stream, _cp, CHECK);
5877 }
5878
5879 void ClassFileParser::clear_class_metadata() {
5880 // metadata created before the instance klass is created. Must be
5881 // deallocated if classfile parsing returns an error.
5882 _cp = NULL;
5883 _fields = NULL;
5884 _methods = NULL;
5885 _inner_classes = NULL;
5886 _nest_members = NULL;
5887 _local_interfaces = NULL;
5888 _combined_annotations = NULL;
5889 _class_annotations = _class_type_annotations = NULL;
5890 _fields_annotations = _fields_type_annotations = NULL;
5891 }
5892
5893 // Destructor to clean up
5894 ClassFileParser::~ClassFileParser() {
5895 _class_name->decrement_refcount();
5896
5897 if (_cp != NULL) {
5898 MetadataFactory::free_metadata(_loader_data, _cp);
5899 }
5900 if (_fields != NULL) {
5901 MetadataFactory::free_array<u2>(_loader_data, _fields);
5902 }
5903
5904 if (_methods != NULL) {
5905 // Free methods
5906 InstanceKlass::deallocate_methods(_loader_data, _methods);
5907 }
5908
5909 // beware of the Universe::empty_blah_array!!
5910 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5911 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5912 }
5913
5914 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
5915 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5916 }
5917
5918 // Free interfaces
5919 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5920 _local_interfaces, _transitive_interfaces);
5921
5922 if (_combined_annotations != NULL) {
5923 // After all annotations arrays have been created, they are installed into the
5924 // Annotations object that will be assigned to the InstanceKlass being created.
5925
5926 // Deallocate the Annotations object and the installed annotations arrays.
5927 _combined_annotations->deallocate_contents(_loader_data);
5928
5929 // If the _combined_annotations pointer is non-NULL,
5930 // then the other annotations fields should have been cleared.
5931 assert(_class_annotations == NULL, "Should have been cleared");
5932 assert(_class_type_annotations == NULL, "Should have been cleared");
5933 assert(_fields_annotations == NULL, "Should have been cleared");
5934 assert(_fields_type_annotations == NULL, "Should have been cleared");
5935 } else {
5936 // If the annotations arrays were not installed into the Annotations object,
5937 // then they have to be deallocated explicitly.
5938 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
5939 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
5940 Annotations::free_contents(_loader_data, _fields_annotations);
5941 Annotations::free_contents(_loader_data, _fields_type_annotations);
5942 }
5943
5944 clear_class_metadata();
5945 _transitive_interfaces = NULL;
5946
5947 // deallocate the klass if already created. Don't directly deallocate, but add
5948 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5949 // at a safepoint.
5950 if (_klass_to_deallocate != NULL) {
5951 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5952 }
5953 }
5954
5955 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5956 TRAPS) {
5957
5958 assert(stream != NULL, "invariant");
5959 assert(_class_name != NULL, "invariant");
5960
5961 // BEGIN STREAM PARSING
5962 stream->guarantee_more(8, CHECK); // magic, major, minor
5963 // Magic value
5964 const u4 magic = stream->get_u4_fast();
5965 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5966 "Incompatible magic value %u in class file %s",
5967 magic, CHECK);
5968
5969 // Version numbers
5970 _minor_version = stream->get_u2_fast();
5971 _major_version = stream->get_u2_fast();
5972
5973 if (DumpSharedSpaces && _major_version < JAVA_6_VERSION) {
5974 ResourceMark rm;
5975 warning("Pre JDK 6 class not supported by CDS: %u.%u %s",
5976 _major_version, _minor_version, _class_name->as_C_string());
5977 Exceptions::fthrow(
5978 THREAD_AND_LOCATION,
5979 vmSymbols::java_lang_UnsupportedClassVersionError(),
5980 "Unsupported major.minor version for dump time %u.%u",
5981 _major_version,
5982 _minor_version);
5983 }
5984
5985 // Check version numbers - we check this even with verifier off
5986 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
5987
5988 stream->guarantee_more(3, CHECK); // length, first cp tag
5989 u2 cp_size = stream->get_u2_fast();
5990
5991 guarantee_property(
5992 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5993 cp_size, CHECK);
5994
5995 _orig_cp_size = cp_size;
5996 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
5997 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
5998 }
5999 cp_size += _max_num_patched_klasses;
6000
6001 _cp = ConstantPool::allocate(_loader_data,
6002 cp_size,
6003 CHECK);
6004
6005 ConstantPool* const cp = _cp;
6006
6007 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6008
6009 assert(cp_size == (const u2)cp->length(), "invariant");
6010
6011 // ACCESS FLAGS
6012 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6013
6014 // Access flags
6015 jint flags;
6016 // JVM_ACC_MODULE is defined in JDK-9 and later.
6017 if (_major_version >= JAVA_9_VERSION) {
6018 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
6019 } else {
6020 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
6021 }
6022
6023 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6024 // Set abstract bit for old class files for backward compatibility
6025 flags |= JVM_ACC_ABSTRACT;
6026 }
6027
6028 verify_legal_class_modifiers(flags, CHECK);
6029
6030 short bad_constant = class_bad_constant_seen();
6031 if (bad_constant != 0) {
6032 // Do not throw CFE until after the access_flags are checked because if
6033 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6034 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6035 }
6036
6037 _access_flags.set_flags(flags);
6038
6039 // This class and superclass
6040 _this_class_index = stream->get_u2_fast();
6041 check_property(
6042 valid_cp_range(_this_class_index, cp_size) &&
6043 cp->tag_at(_this_class_index).is_unresolved_klass(),
6044 "Invalid this class index %u in constant pool in class file %s",
6045 _this_class_index, CHECK);
6046
6047 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6048 assert(class_name_in_cp != NULL, "class_name can't be null");
6049
6050 // Update _class_name to reflect the name in the constant pool
6051 update_class_name(class_name_in_cp);
6052
6053 // Don't need to check whether this class name is legal or not.
6054 // It has been checked when constant pool is parsed.
6055 // However, make sure it is not an array type.
6056 if (_need_verify) {
6057 guarantee_property(_class_name->char_at(0) != JVM_SIGNATURE_ARRAY,
6058 "Bad class name in class file %s",
6059 CHECK);
6060 }
6061
6062 // Checks if name in class file matches requested name
6063 if (_requested_name != NULL && _requested_name != _class_name) {
6064 ResourceMark rm(THREAD);
6065 Exceptions::fthrow(
6066 THREAD_AND_LOCATION,
6067 vmSymbols::java_lang_NoClassDefFoundError(),
6068 "%s (wrong name: %s)",
6069 _class_name->as_C_string(),
6070 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6071 );
6072 return;
6073 }
6074
6075 // if this is an anonymous class fix up its name if it's in the unnamed
6076 // package. Otherwise, throw IAE if it is in a different package than
6077 // its host class.
6078 if (_unsafe_anonymous_host != NULL) {
6079 fix_unsafe_anonymous_class_name(CHECK);
6080 }
6081
6082 // Verification prevents us from creating names with dots in them, this
6083 // asserts that that's the case.
6084 assert(is_internal_format(_class_name), "external class name format used internally");
6085
6086 if (!is_internal()) {
6087 LogTarget(Debug, class, preorder) lt;
6088 if (lt.is_enabled()){
6089 ResourceMark rm(THREAD);
6090 LogStream ls(lt);
6091 ls.print("%s", _class_name->as_klass_external_name());
6092 if (stream->source() != NULL) {
6093 ls.print(" source: %s", stream->source());
6094 }
6095 ls.cr();
6096 }
6097
6098 #if INCLUDE_CDS
6099 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6100 if (!ClassLoader::has_jrt_entry()) {
6101 warning("DumpLoadedClassList and CDS are not supported in exploded build");
6102 DumpLoadedClassList = NULL;
6103 } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6104 _unsafe_anonymous_host == NULL) {
6105 // Only dump the classes that can be stored into CDS archive.
6106 // Unsafe anonymous classes such as generated LambdaForm classes are also not included.
6107 oop class_loader = _loader_data->class_loader();
6108 ResourceMark rm(THREAD);
6109 bool skip = false;
6110 if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6111 // For the boot and platform class loaders, skip classes that are not found in the
6112 // java runtime image, such as those found in the --patch-module entries.
6113 // These classes can't be loaded from the archive during runtime.
6114 if (!stream->from_boot_loader_modules_image() && strncmp(stream->source(), "jrt:", 4) != 0) {
6115 skip = true;
6116 }
6117
6118 if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6119 // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6120 // as they can be loaded from the archive during runtime.
6121 skip = false;
6122 }
6123 }
6124 if (skip) {
6125 tty->print_cr("skip writing class %s from source %s to classlist file",
6126 _class_name->as_C_string(), stream->source());
6127 } else {
6128 classlist_file->print_cr("%s", _class_name->as_C_string());
6129 classlist_file->flush();
6130 }
6131 }
6132 }
6133 #endif
6134 }
6135
6136 // SUPERKLASS
6137 _super_class_index = stream->get_u2_fast();
6138 _super_klass = parse_super_class(cp,
6139 _super_class_index,
6140 _need_verify,
6141 CHECK);
6142
6143 // Interfaces
6144 _itfs_len = stream->get_u2_fast();
6145 parse_interfaces(stream,
6146 _itfs_len,
6147 cp,
6148 &_has_nonstatic_concrete_methods,
6149 CHECK);
6150
6151 assert(_local_interfaces != NULL, "invariant");
6152
6153 // Fields (offsets are filled in later)
6154 _fac = new FieldAllocationCount();
6155 parse_fields(stream,
6156 _access_flags.is_interface(),
6157 _fac,
6158 cp,
6159 cp_size,
6160 &_java_fields_count,
6161 CHECK);
6162
6163 assert(_fields != NULL, "invariant");
6164
6165 // Methods
6166 AccessFlags promoted_flags;
6167 parse_methods(stream,
6168 _access_flags.is_interface(),
6169 &promoted_flags,
6170 &_has_final_method,
6171 &_declares_nonstatic_concrete_methods,
6172 CHECK);
6173
6174 assert(_methods != NULL, "invariant");
6175
6176 // promote flags from parse_methods() to the klass' flags
6177 _access_flags.add_promoted_flags(promoted_flags.as_int());
6178
6179 if (_declares_nonstatic_concrete_methods) {
6180 _has_nonstatic_concrete_methods = true;
6181 }
6182
6183 // Additional attributes/annotations
6184 _parsed_annotations = new ClassAnnotationCollector();
6185 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6186
6187 assert(_inner_classes != NULL, "invariant");
6188
6189 // Finalize the Annotations metadata object,
6190 // now that all annotation arrays have been created.
6191 create_combined_annotations(CHECK);
6192
6193 // Make sure this is the end of class file stream
6194 guarantee_property(stream->at_eos(),
6195 "Extra bytes at the end of class file %s",
6196 CHECK);
6197
6198 // all bytes in stream read and parsed
6199 }
6200
6201 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6202 ConstantPool* cp,
6203 TRAPS) {
6204 assert(stream != NULL, "invariant");
6205 assert(stream->at_eos(), "invariant");
6206 assert(cp != NULL, "invariant");
6207 assert(_loader_data != NULL, "invariant");
6208
6209 if (_class_name == vmSymbols::java_lang_Object()) {
6210 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6211 "java.lang.Object cannot implement an interface in class file %s",
6212 CHECK);
6213 }
6214 // We check super class after class file is parsed and format is checked
6215 if (_super_class_index > 0 && NULL ==_super_klass) {
6216 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6217 if (_access_flags.is_interface()) {
6218 // Before attempting to resolve the superclass, check for class format
6219 // errors not checked yet.
6220 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6221 "Interfaces must have java.lang.Object as superclass in class file %s",
6222 CHECK);
6223 }
6224 Handle loader(THREAD, _loader_data->class_loader());
6225 _super_klass = (const InstanceKlass*)
6226 SystemDictionary::resolve_super_or_fail(_class_name,
6227 super_class_name,
6228 loader,
6229 _protection_domain,
6230 true,
6231 CHECK);
6232 }
6233
6234 if (_super_klass != NULL) {
6235 if (_super_klass->has_nonstatic_concrete_methods()) {
6236 _has_nonstatic_concrete_methods = true;
6237 }
6238
6239 if (_super_klass->is_interface()) {
6240 ResourceMark rm(THREAD);
6241 Exceptions::fthrow(
6242 THREAD_AND_LOCATION,
6243 vmSymbols::java_lang_IncompatibleClassChangeError(),
6244 "class %s has interface %s as super class",
6245 _class_name->as_klass_external_name(),
6246 _super_klass->external_name()
6247 );
6248 return;
6249 }
6250 // Make sure super class is not final
6251 if (_super_klass->is_final()) {
6252 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6253 }
6254 }
6255
6256 // Compute the transitive list of all unique interfaces implemented by this class
6257 _transitive_interfaces =
6258 compute_transitive_interfaces(_super_klass,
6259 _local_interfaces,
6260 _loader_data,
6261 CHECK);
6262
6263 assert(_transitive_interfaces != NULL, "invariant");
6264
6265 // sort methods
6266 _method_ordering = sort_methods(_methods);
6267
6268 _all_mirandas = new GrowableArray<Method*>(20);
6269
6270 Handle loader(THREAD, _loader_data->class_loader());
6271 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6272 &_num_miranda_methods,
6273 _all_mirandas,
6274 _super_klass,
6275 _methods,
6276 _access_flags,
6277 _major_version,
6278 loader,
6279 _class_name,
6280 _local_interfaces,
6281 CHECK);
6282
6283 // Size of Java itable (in words)
6284 _itable_size = _access_flags.is_interface() ? 0 :
6285 klassItable::compute_itable_size(_transitive_interfaces);
6286
6287 assert(_fac != NULL, "invariant");
6288 assert(_parsed_annotations != NULL, "invariant");
6289
6290 _field_info = new FieldLayoutInfo();
6291 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6292
6293 // Compute reference typ
6294 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6295
6296 }
6297
6298 void ClassFileParser::set_klass(InstanceKlass* klass) {
6299
6300 #ifdef ASSERT
6301 if (klass != NULL) {
6302 assert(NULL == _klass, "leaking?");
6303 }
6304 #endif
6305
6306 _klass = klass;
6307 }
6308
6309 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6310
6311 #ifdef ASSERT
6312 if (klass != NULL) {
6313 assert(NULL == _klass_to_deallocate, "leaking?");
6314 }
6315 #endif
6316
6317 _klass_to_deallocate = klass;
6318 }
6319
6320 // Caller responsible for ResourceMark
6321 // clone stream with rewound position
6322 const ClassFileStream* ClassFileParser::clone_stream() const {
6323 assert(_stream != NULL, "invariant");
6324
6325 return _stream->clone();
6326 }
6327 // ----------------------------------------------------------------------------
6328 // debugging
6329
6330 #ifdef ASSERT
6331
6332 // return true if class_name contains no '.' (internal format is '/')
6333 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6334 if (class_name != NULL) {
6335 ResourceMark rm;
6336 char* name = class_name->as_C_string();
6337 return strchr(name, JVM_SIGNATURE_DOT) == NULL;
6338 } else {
6339 return true;
6340 }
6341 }
6342
6343 #endif