1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24 #include "precompiled.hpp"
25 #include "jvm.h"
26 #include "aot/aotLoader.hpp"
27 #include "classfile/classFileParser.hpp"
28 #include "classfile/classFileStream.hpp"
29 #include "classfile/classLoader.hpp"
30 #include "classfile/classLoaderData.inline.hpp"
31 #include "classfile/defaultMethods.hpp"
32 #include "classfile/dictionary.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/moduleEntry.hpp"
35 #include "classfile/symbolTable.hpp"
36 #include "classfile/systemDictionary.hpp"
37 #include "classfile/verificationType.hpp"
38 #include "classfile/verifier.hpp"
39 #include "classfile/vmSymbols.hpp"
40 #include "logging/log.hpp"
41 #include "logging/logStream.hpp"
42 #include "memory/allocation.hpp"
43 #include "memory/metadataFactory.hpp"
44 #include "memory/oopFactory.hpp"
45 #include "memory/resourceArea.hpp"
46 #include "memory/universe.hpp"
47 #include "oops/annotations.hpp"
48 #include "oops/constantPool.inline.hpp"
49 #include "oops/fieldStreams.hpp"
50 #include "oops/instanceKlass.hpp"
51 #include "oops/instanceMirrorKlass.hpp"
52 #include "oops/klass.inline.hpp"
53 #include "oops/klassVtable.hpp"
54 #include "oops/metadata.hpp"
55 #include "oops/method.hpp"
56 #include "oops/oop.inline.hpp"
57 #include "oops/symbol.hpp"
58 #include "prims/jvmtiExport.hpp"
59 #include "prims/jvmtiThreadState.hpp"
60 #include "runtime/arguments.hpp"
61 #include "runtime/handles.inline.hpp"
62 #include "runtime/javaCalls.hpp"
63 #include "runtime/perfData.hpp"
64 #include "runtime/reflection.hpp"
65 #include "runtime/safepointVerifiers.hpp"
66 #include "runtime/signature.hpp"
67 #include "runtime/timer.hpp"
68 #include "services/classLoadingService.hpp"
69 #include "services/threadService.hpp"
70 #include "utilities/align.hpp"
71 #include "utilities/bitMap.inline.hpp"
72 #include "utilities/copy.hpp"
73 #include "utilities/exceptions.hpp"
74 #include "utilities/globalDefinitions.hpp"
75 #include "utilities/growableArray.hpp"
76 #include "utilities/macros.hpp"
77 #include "utilities/ostream.hpp"
78 #include "utilities/resourceHash.hpp"
79 #if INCLUDE_CDS
80 #include "classfile/systemDictionaryShared.hpp"
81 #endif
82 #if INCLUDE_JFR
83 #include "jfr/support/jfrTraceIdExtension.hpp"
84 #endif
85
86 // We generally try to create the oops directly when parsing, rather than
87 // allocating temporary data structures and copying the bytes twice. A
88 // temporary area is only needed when parsing utf8 entries in the constant
89 // pool and when parsing line number tables.
90
91 // We add assert in debug mode when class format is not checked.
92
93 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
94 #define JAVA_MIN_SUPPORTED_VERSION 45
95 #define JAVA_PREVIEW_MINOR_VERSION 65535
96
97 // Used for two backward compatibility reasons:
98 // - to check for new additions to the class file format in JDK1.5
99 // - to check for bug fixes in the format checker in JDK1.5
100 #define JAVA_1_5_VERSION 49
101
102 // Used for backward compatibility reasons:
103 // - to check for javac bug fixes that happened after 1.5
104 // - also used as the max version when running in jdk6
105 #define JAVA_6_VERSION 50
106
107 // Used for backward compatibility reasons:
108 // - to disallow argument and require ACC_STATIC for <clinit> methods
109 #define JAVA_7_VERSION 51
110
111 // Extension method support.
112 #define JAVA_8_VERSION 52
113
114 #define JAVA_9_VERSION 53
115
116 #define JAVA_10_VERSION 54
117
118 #define JAVA_11_VERSION 55
119
120 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
121 assert((bad_constant == 19 || bad_constant == 20) && _major_version >= JAVA_9_VERSION,
122 "Unexpected bad constant pool entry");
123 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
124 }
125
126 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
127 ConstantPool* cp,
128 const int length,
129 TRAPS) {
130 assert(stream != NULL, "invariant");
131 assert(cp != NULL, "invariant");
132
133 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
134 // this function (_current can be allocated in a register, with scalar
135 // replacement of aggregates). The _current pointer is copied back to
136 // stream() when this function returns. DON'T call another method within
137 // this method that uses stream().
138 const ClassFileStream cfs1 = *stream;
139 const ClassFileStream* const cfs = &cfs1;
140
141 assert(cfs->allocated_on_stack(), "should be local");
142 debug_only(const u1* const old_current = stream->current();)
143
144 // Used for batching symbol allocations.
145 const char* names[SymbolTable::symbol_alloc_batch_size];
146 int lengths[SymbolTable::symbol_alloc_batch_size];
147 int indices[SymbolTable::symbol_alloc_batch_size];
148 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
149 int names_count = 0;
150
151 // parsing Index 0 is unused
152 for (int index = 1; index < length; index++) {
153 // Each of the following case guarantees one more byte in the stream
154 // for the following tag or the access_flags following constant pool,
155 // so we don't need bounds-check for reading tag.
156 const u1 tag = cfs->get_u1_fast();
157 switch (tag) {
158 case JVM_CONSTANT_Class : {
159 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
160 const u2 name_index = cfs->get_u2_fast();
161 cp->klass_index_at_put(index, name_index);
162 break;
163 }
164 case JVM_CONSTANT_Fieldref: {
165 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
166 const u2 class_index = cfs->get_u2_fast();
167 const u2 name_and_type_index = cfs->get_u2_fast();
168 cp->field_at_put(index, class_index, name_and_type_index);
169 break;
170 }
171 case JVM_CONSTANT_Methodref: {
172 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
173 const u2 class_index = cfs->get_u2_fast();
174 const u2 name_and_type_index = cfs->get_u2_fast();
175 cp->method_at_put(index, class_index, name_and_type_index);
176 break;
177 }
178 case JVM_CONSTANT_InterfaceMethodref: {
179 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
180 const u2 class_index = cfs->get_u2_fast();
181 const u2 name_and_type_index = cfs->get_u2_fast();
182 cp->interface_method_at_put(index, class_index, name_and_type_index);
183 break;
184 }
185 case JVM_CONSTANT_String : {
186 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
187 const u2 string_index = cfs->get_u2_fast();
188 cp->string_index_at_put(index, string_index);
189 break;
190 }
191 case JVM_CONSTANT_MethodHandle :
192 case JVM_CONSTANT_MethodType: {
193 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
194 classfile_parse_error(
195 "Class file version does not support constant tag %u in class file %s",
196 tag, CHECK);
197 }
198 if (tag == JVM_CONSTANT_MethodHandle) {
199 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
200 const u1 ref_kind = cfs->get_u1_fast();
201 const u2 method_index = cfs->get_u2_fast();
202 cp->method_handle_index_at_put(index, ref_kind, method_index);
203 }
204 else if (tag == JVM_CONSTANT_MethodType) {
205 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
206 const u2 signature_index = cfs->get_u2_fast();
207 cp->method_type_index_at_put(index, signature_index);
208 }
209 else {
210 ShouldNotReachHere();
211 }
212 break;
213 }
214 case JVM_CONSTANT_Dynamic : {
215 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
216 classfile_parse_error(
217 "Class file version does not support constant tag %u in class file %s",
218 tag, CHECK);
219 }
220 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
221 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
222 const u2 name_and_type_index = cfs->get_u2_fast();
223 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
224 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
225 }
226 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
227 break;
228 }
229 case JVM_CONSTANT_InvokeDynamic : {
230 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
231 classfile_parse_error(
232 "Class file version does not support constant tag %u in class file %s",
233 tag, CHECK);
234 }
235 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
236 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
237 const u2 name_and_type_index = cfs->get_u2_fast();
238 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
239 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
240 }
241 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
242 break;
243 }
244 case JVM_CONSTANT_Integer: {
245 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
246 const u4 bytes = cfs->get_u4_fast();
247 cp->int_at_put(index, (jint)bytes);
248 break;
249 }
250 case JVM_CONSTANT_Float: {
251 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
252 const u4 bytes = cfs->get_u4_fast();
253 cp->float_at_put(index, *(jfloat*)&bytes);
254 break;
255 }
256 case JVM_CONSTANT_Long: {
257 // A mangled type might cause you to overrun allocated memory
258 guarantee_property(index + 1 < length,
259 "Invalid constant pool entry %u in class file %s",
260 index,
261 CHECK);
262 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
263 const u8 bytes = cfs->get_u8_fast();
264 cp->long_at_put(index, bytes);
265 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
266 break;
267 }
268 case JVM_CONSTANT_Double: {
269 // A mangled type might cause you to overrun allocated memory
270 guarantee_property(index+1 < length,
271 "Invalid constant pool entry %u in class file %s",
272 index,
273 CHECK);
274 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
275 const u8 bytes = cfs->get_u8_fast();
276 cp->double_at_put(index, *(jdouble*)&bytes);
277 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
278 break;
279 }
280 case JVM_CONSTANT_NameAndType: {
281 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
282 const u2 name_index = cfs->get_u2_fast();
283 const u2 signature_index = cfs->get_u2_fast();
284 cp->name_and_type_at_put(index, name_index, signature_index);
285 break;
286 }
287 case JVM_CONSTANT_Utf8 : {
288 cfs->guarantee_more(2, CHECK); // utf8_length
289 u2 utf8_length = cfs->get_u2_fast();
290 const u1* utf8_buffer = cfs->current();
291 assert(utf8_buffer != NULL, "null utf8 buffer");
292 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
293 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
294 cfs->skip_u1_fast(utf8_length);
295
296 // Before storing the symbol, make sure it's legal
297 if (_need_verify) {
298 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
299 }
300
301 if (has_cp_patch_at(index)) {
302 Handle patch = clear_cp_patch_at(index);
303 guarantee_property(java_lang_String::is_instance(patch()),
304 "Illegal utf8 patch at %d in class file %s",
305 index,
306 CHECK);
307 const char* const str = java_lang_String::as_utf8_string(patch());
308 // (could use java_lang_String::as_symbol instead, but might as well batch them)
309 utf8_buffer = (const u1*) str;
310 utf8_length = (int) strlen(str);
311 }
312
313 unsigned int hash;
314 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
315 utf8_length,
316 hash);
317 if (result == NULL) {
318 names[names_count] = (const char*)utf8_buffer;
319 lengths[names_count] = utf8_length;
320 indices[names_count] = index;
321 hashValues[names_count++] = hash;
322 if (names_count == SymbolTable::symbol_alloc_batch_size) {
323 SymbolTable::new_symbols(_loader_data,
324 cp,
325 names_count,
326 names,
327 lengths,
328 indices,
329 hashValues,
330 CHECK);
331 names_count = 0;
332 }
333 } else {
334 cp->symbol_at_put(index, result);
335 }
336 break;
337 }
338 case 19:
339 case 20: {
340 // Record that an error occurred in these two cases but keep parsing so
341 // that ACC_Module can be checked for in the access_flags. Need to
342 // throw NoClassDefFoundError in that case.
343 if (_major_version >= JAVA_9_VERSION) {
344 cfs->guarantee_more(3, CHECK);
345 cfs->get_u2_fast();
346 set_class_bad_constant_seen(tag);
347 break;
348 }
349 }
350 default: {
351 classfile_parse_error("Unknown constant tag %u in class file %s",
352 tag,
353 CHECK);
354 break;
355 }
356 } // end of switch(tag)
357 } // end of for
358
359 // Allocate the remaining symbols
360 if (names_count > 0) {
361 SymbolTable::new_symbols(_loader_data,
362 cp,
363 names_count,
364 names,
365 lengths,
366 indices,
367 hashValues,
368 CHECK);
369 }
370
371 // Copy _current pointer of local copy back to stream.
372 assert(stream->current() == old_current, "non-exclusive use of stream");
373 stream->set_current(cfs1.current());
374
375 }
376
377 static inline bool valid_cp_range(int index, int length) {
378 return (index > 0 && index < length);
379 }
380
381 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
382 assert(cp != NULL, "invariant");
383 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
384 return cp->symbol_at(index);
385 }
386 return NULL;
387 }
388
389 #ifdef ASSERT
390 PRAGMA_DIAG_PUSH
391 PRAGMA_FORMAT_NONLITERAL_IGNORED
392 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
393 ResourceMark rm(THREAD);
394 fatal(msg, _class_name->as_C_string());
395 }
396
397 void ClassFileParser::report_assert_property_failure(const char* msg,
398 int index,
399 TRAPS) const {
400 ResourceMark rm(THREAD);
401 fatal(msg, index, _class_name->as_C_string());
402 }
403 PRAGMA_DIAG_POP
404 #endif
405
406 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
407 ConstantPool* const cp,
408 const int length,
409 TRAPS) {
410 assert(cp != NULL, "invariant");
411 assert(stream != NULL, "invariant");
412
413 // parsing constant pool entries
414 parse_constant_pool_entries(stream, cp, length, CHECK);
415 if (class_bad_constant_seen() != 0) {
416 // a bad CP entry has been detected previously so stop parsing and just return.
417 return;
418 }
419
420 int index = 1; // declared outside of loops for portability
421 int num_klasses = 0;
422
423 // first verification pass - validate cross references
424 // and fixup class and string constants
425 for (index = 1; index < length; index++) { // Index 0 is unused
426 const jbyte tag = cp->tag_at(index).value();
427 switch (tag) {
428 case JVM_CONSTANT_Class: {
429 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
430 break;
431 }
432 case JVM_CONSTANT_Fieldref:
433 // fall through
434 case JVM_CONSTANT_Methodref:
435 // fall through
436 case JVM_CONSTANT_InterfaceMethodref: {
437 if (!_need_verify) break;
438 const int klass_ref_index = cp->klass_ref_index_at(index);
439 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
440 check_property(valid_klass_reference_at(klass_ref_index),
441 "Invalid constant pool index %u in class file %s",
442 klass_ref_index, CHECK);
443 check_property(valid_cp_range(name_and_type_ref_index, length) &&
444 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
445 "Invalid constant pool index %u in class file %s",
446 name_and_type_ref_index, CHECK);
447 break;
448 }
449 case JVM_CONSTANT_String: {
450 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
451 break;
452 }
453 case JVM_CONSTANT_Integer:
454 break;
455 case JVM_CONSTANT_Float:
456 break;
457 case JVM_CONSTANT_Long:
458 case JVM_CONSTANT_Double: {
459 index++;
460 check_property(
461 (index < length && cp->tag_at(index).is_invalid()),
462 "Improper constant pool long/double index %u in class file %s",
463 index, CHECK);
464 break;
465 }
466 case JVM_CONSTANT_NameAndType: {
467 if (!_need_verify) break;
468 const int name_ref_index = cp->name_ref_index_at(index);
469 const int signature_ref_index = cp->signature_ref_index_at(index);
470 check_property(valid_symbol_at(name_ref_index),
471 "Invalid constant pool index %u in class file %s",
472 name_ref_index, CHECK);
473 check_property(valid_symbol_at(signature_ref_index),
474 "Invalid constant pool index %u in class file %s",
475 signature_ref_index, CHECK);
476 break;
477 }
478 case JVM_CONSTANT_Utf8:
479 break;
480 case JVM_CONSTANT_UnresolvedClass: // fall-through
481 case JVM_CONSTANT_UnresolvedClassInError: {
482 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
483 break;
484 }
485 case JVM_CONSTANT_ClassIndex: {
486 const int class_index = cp->klass_index_at(index);
487 check_property(valid_symbol_at(class_index),
488 "Invalid constant pool index %u in class file %s",
489 class_index, CHECK);
490 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
491 break;
492 }
493 case JVM_CONSTANT_StringIndex: {
494 const int string_index = cp->string_index_at(index);
495 check_property(valid_symbol_at(string_index),
496 "Invalid constant pool index %u in class file %s",
497 string_index, CHECK);
498 Symbol* const sym = cp->symbol_at(string_index);
499 cp->unresolved_string_at_put(index, sym);
500 break;
501 }
502 case JVM_CONSTANT_MethodHandle: {
503 const int ref_index = cp->method_handle_index_at(index);
504 check_property(valid_cp_range(ref_index, length),
505 "Invalid constant pool index %u in class file %s",
506 ref_index, CHECK);
507 const constantTag tag = cp->tag_at(ref_index);
508 const int ref_kind = cp->method_handle_ref_kind_at(index);
509
510 switch (ref_kind) {
511 case JVM_REF_getField:
512 case JVM_REF_getStatic:
513 case JVM_REF_putField:
514 case JVM_REF_putStatic: {
515 check_property(
516 tag.is_field(),
517 "Invalid constant pool index %u in class file %s (not a field)",
518 ref_index, CHECK);
519 break;
520 }
521 case JVM_REF_invokeVirtual:
522 case JVM_REF_newInvokeSpecial: {
523 check_property(
524 tag.is_method(),
525 "Invalid constant pool index %u in class file %s (not a method)",
526 ref_index, CHECK);
527 break;
528 }
529 case JVM_REF_invokeStatic:
530 case JVM_REF_invokeSpecial: {
531 check_property(
532 tag.is_method() ||
533 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
534 "Invalid constant pool index %u in class file %s (not a method)",
535 ref_index, CHECK);
536 break;
537 }
538 case JVM_REF_invokeInterface: {
539 check_property(
540 tag.is_interface_method(),
541 "Invalid constant pool index %u in class file %s (not an interface method)",
542 ref_index, CHECK);
543 break;
544 }
545 default: {
546 classfile_parse_error(
547 "Bad method handle kind at constant pool index %u in class file %s",
548 index, CHECK);
549 }
550 } // switch(refkind)
551 // Keep the ref_index unchanged. It will be indirected at link-time.
552 break;
553 } // case MethodHandle
554 case JVM_CONSTANT_MethodType: {
555 const int ref_index = cp->method_type_index_at(index);
556 check_property(valid_symbol_at(ref_index),
557 "Invalid constant pool index %u in class file %s",
558 ref_index, CHECK);
559 break;
560 }
561 case JVM_CONSTANT_Dynamic: {
562 const int name_and_type_ref_index =
563 cp->invoke_dynamic_name_and_type_ref_index_at(index);
564
565 check_property(valid_cp_range(name_and_type_ref_index, length) &&
566 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
567 "Invalid constant pool index %u in class file %s",
568 name_and_type_ref_index, CHECK);
569 // bootstrap specifier index must be checked later,
570 // when BootstrapMethods attr is available
571
572 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
573 cp->set_has_dynamic_constant();
574 break;
575 }
576 case JVM_CONSTANT_InvokeDynamic: {
577 const int name_and_type_ref_index =
578 cp->invoke_dynamic_name_and_type_ref_index_at(index);
579
580 check_property(valid_cp_range(name_and_type_ref_index, length) &&
581 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
582 "Invalid constant pool index %u in class file %s",
583 name_and_type_ref_index, CHECK);
584 // bootstrap specifier index must be checked later,
585 // when BootstrapMethods attr is available
586 break;
587 }
588 default: {
589 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
590 ShouldNotReachHere();
591 break;
592 }
593 } // switch(tag)
594 } // end of for
595
596 _first_patched_klass_resolved_index = num_klasses;
597 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
598
599 if (_cp_patches != NULL) {
600 // need to treat this_class specially...
601
602 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
603 // for now. These will be replaced with actual names of the patched classes in patch_class().
604 Symbol* s = vmSymbols::star_name();
605 for (int n=_orig_cp_size; n<cp->length(); n++) {
606 cp->symbol_at_put(n, s);
607 }
608
609 int this_class_index;
610 {
611 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
612 const u1* const mark = stream->current();
613 stream->skip_u2_fast(1); // skip flags
614 this_class_index = stream->get_u2_fast();
615 stream->set_current(mark); // revert to mark
616 }
617
618 for (index = 1; index < length; index++) { // Index 0 is unused
619 if (has_cp_patch_at(index)) {
620 guarantee_property(index != this_class_index,
621 "Illegal constant pool patch to self at %d in class file %s",
622 index, CHECK);
623 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
624 }
625 }
626 }
627
628 if (!_need_verify) {
629 return;
630 }
631
632 // second verification pass - checks the strings are of the right format.
633 // but not yet to the other entries
634 for (index = 1; index < length; index++) {
635 const jbyte tag = cp->tag_at(index).value();
636 switch (tag) {
637 case JVM_CONSTANT_UnresolvedClass: {
638 const Symbol* const class_name = cp->klass_name_at(index);
639 // check the name, even if _cp_patches will overwrite it
640 verify_legal_class_name(class_name, CHECK);
641 break;
642 }
643 case JVM_CONSTANT_NameAndType: {
644 if (_need_verify) {
645 const int sig_index = cp->signature_ref_index_at(index);
646 const int name_index = cp->name_ref_index_at(index);
647 const Symbol* const name = cp->symbol_at(name_index);
648 const Symbol* const sig = cp->symbol_at(sig_index);
649 guarantee_property(sig->utf8_length() != 0,
650 "Illegal zero length constant pool entry at %d in class %s",
651 sig_index, CHECK);
652 guarantee_property(name->utf8_length() != 0,
653 "Illegal zero length constant pool entry at %d in class %s",
654 name_index, CHECK);
655
656 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
657 // Format check method name and signature
658 verify_legal_method_name(name, CHECK);
659 verify_legal_method_signature(name, sig, CHECK);
660 } else {
661 // Format check field name and signature
662 verify_legal_field_name(name, CHECK);
663 verify_legal_field_signature(name, sig, CHECK);
664 }
665 }
666 break;
667 }
668 case JVM_CONSTANT_Dynamic: {
669 const int name_and_type_ref_index =
670 cp->name_and_type_ref_index_at(index);
671 // already verified to be utf8
672 const int name_ref_index =
673 cp->name_ref_index_at(name_and_type_ref_index);
674 // already verified to be utf8
675 const int signature_ref_index =
676 cp->signature_ref_index_at(name_and_type_ref_index);
677 const Symbol* const name = cp->symbol_at(name_ref_index);
678 const Symbol* const signature = cp->symbol_at(signature_ref_index);
679 if (_need_verify) {
680 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
681 // Need only to be sure signature is non-zero length and the right type.
682 if (signature->utf8_length() == 0 ||
683 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
684 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
685 }
686 }
687 break;
688 }
689 case JVM_CONSTANT_InvokeDynamic:
690 case JVM_CONSTANT_Fieldref:
691 case JVM_CONSTANT_Methodref:
692 case JVM_CONSTANT_InterfaceMethodref: {
693 const int name_and_type_ref_index =
694 cp->name_and_type_ref_index_at(index);
695 // already verified to be utf8
696 const int name_ref_index =
697 cp->name_ref_index_at(name_and_type_ref_index);
698 // already verified to be utf8
699 const int signature_ref_index =
700 cp->signature_ref_index_at(name_and_type_ref_index);
701 const Symbol* const name = cp->symbol_at(name_ref_index);
702 const Symbol* const signature = cp->symbol_at(signature_ref_index);
703 if (tag == JVM_CONSTANT_Fieldref) {
704 if (_need_verify) {
705 // Field name and signature are verified above, when iterating NameAndType_info.
706 // Need only to be sure signature is non-zero length and the right type.
707 if (signature->utf8_length() == 0 ||
708 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
709 throwIllegalSignature("Field", name, signature, CHECK);
710 }
711 }
712 } else {
713 if (_need_verify) {
714 // Method name and signature are verified above, when iterating NameAndType_info.
715 // Need only to be sure signature is non-zero length and the right type.
716 if (signature->utf8_length() == 0 ||
717 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
718 throwIllegalSignature("Method", name, signature, CHECK);
719 }
720 }
721 // 4509014: If a class method name begins with '<', it must be "<init>"
722 const unsigned int name_len = name->utf8_length();
723 if (tag == JVM_CONSTANT_Methodref &&
724 name_len != 0 &&
725 name->byte_at(0) == '<' &&
726 name != vmSymbols::object_initializer_name()) {
727 classfile_parse_error(
728 "Bad method name at constant pool index %u in class file %s",
729 name_ref_index, CHECK);
730 }
731 }
732 break;
733 }
734 case JVM_CONSTANT_MethodHandle: {
735 const int ref_index = cp->method_handle_index_at(index);
736 const int ref_kind = cp->method_handle_ref_kind_at(index);
737 switch (ref_kind) {
738 case JVM_REF_invokeVirtual:
739 case JVM_REF_invokeStatic:
740 case JVM_REF_invokeSpecial:
741 case JVM_REF_newInvokeSpecial: {
742 const int name_and_type_ref_index =
743 cp->name_and_type_ref_index_at(ref_index);
744 const int name_ref_index =
745 cp->name_ref_index_at(name_and_type_ref_index);
746 const Symbol* const name = cp->symbol_at(name_ref_index);
747 if (ref_kind == JVM_REF_newInvokeSpecial) {
748 if (name != vmSymbols::object_initializer_name()) {
749 classfile_parse_error(
750 "Bad constructor name at constant pool index %u in class file %s",
751 name_ref_index, CHECK);
752 }
753 } else {
754 if (name == vmSymbols::object_initializer_name()) {
755 classfile_parse_error(
756 "Bad method name at constant pool index %u in class file %s",
757 name_ref_index, CHECK);
758 }
759 }
760 break;
761 }
762 // Other ref_kinds are already fully checked in previous pass.
763 } // switch(ref_kind)
764 break;
765 }
766 case JVM_CONSTANT_MethodType: {
767 const Symbol* const no_name = vmSymbols::type_name(); // place holder
768 const Symbol* const signature = cp->method_type_signature_at(index);
769 verify_legal_method_signature(no_name, signature, CHECK);
770 break;
771 }
772 case JVM_CONSTANT_Utf8: {
773 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
774 }
775 } // switch(tag)
776 } // end of for
777 }
778
779 Handle ClassFileParser::clear_cp_patch_at(int index) {
780 Handle patch = cp_patch_at(index);
781 _cp_patches->at_put(index, Handle());
782 assert(!has_cp_patch_at(index), "");
783 return patch;
784 }
785
786 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
787 int name_index = _orig_cp_size + _num_patched_klasses;
788 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
789
790 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
791 _num_patched_klasses ++;
792 }
793
794 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
795 int index,
796 Handle patch,
797 TRAPS) {
798 assert(cp != NULL, "invariant");
799
800 BasicType patch_type = T_VOID;
801
802 switch (cp->tag_at(index).value()) {
803
804 case JVM_CONSTANT_UnresolvedClass: {
805 // Patching a class means pre-resolving it.
806 // The name in the constant pool is ignored.
807 if (java_lang_Class::is_instance(patch())) {
808 guarantee_property(!java_lang_Class::is_primitive(patch()),
809 "Illegal class patch at %d in class file %s",
810 index, CHECK);
811 Klass* k = java_lang_Class::as_Klass(patch());
812 patch_class(cp, index, k, k->name());
813 } else {
814 guarantee_property(java_lang_String::is_instance(patch()),
815 "Illegal class patch at %d in class file %s",
816 index, CHECK);
817 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
818 patch_class(cp, index, NULL, name);
819 }
820 break;
821 }
822
823 case JVM_CONSTANT_String: {
824 // skip this patch and don't clear it. Needs the oop array for resolved
825 // references to be created first.
826 return;
827 }
828 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
829 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
830 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
831 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
832 patch_prim:
833 {
834 jvalue value;
835 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
836 guarantee_property(value_type == patch_type,
837 "Illegal primitive patch at %d in class file %s",
838 index, CHECK);
839 switch (value_type) {
840 case T_INT: cp->int_at_put(index, value.i); break;
841 case T_FLOAT: cp->float_at_put(index, value.f); break;
842 case T_LONG: cp->long_at_put(index, value.j); break;
843 case T_DOUBLE: cp->double_at_put(index, value.d); break;
844 default: assert(false, "");
845 }
846 } // end patch_prim label
847 break;
848
849 default: {
850 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
851 guarantee_property(!has_cp_patch_at(index),
852 "Illegal unexpected patch at %d in class file %s",
853 index, CHECK);
854 return;
855 }
856 } // end of switch(tag)
857
858 // On fall-through, mark the patch as used.
859 clear_cp_patch_at(index);
860 }
861 class NameSigHash: public ResourceObj {
862 public:
863 const Symbol* _name; // name
864 const Symbol* _sig; // signature
865 NameSigHash* _next; // Next entry in hash table
866 };
867
868 static const int HASH_ROW_SIZE = 256;
869
870 static unsigned int hash(const Symbol* name, const Symbol* sig) {
871 unsigned int raw_hash = 0;
872 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
873 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
874
875 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
876 }
877
878
879 static void initialize_hashtable(NameSigHash** table) {
880 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
881 }
882 // Return false if the name/sig combination is found in table.
883 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
884 // The old format checker uses heap sort to find duplicates.
885 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
886 // of table since we don't expect Symbol*'s to move.
887 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
888 assert(name != NULL, "name in constant pool is NULL");
889
890 // First lookup for duplicates
891 int index = hash(name, sig);
892 NameSigHash* entry = table[index];
893 while (entry != NULL) {
894 if (entry->_name == name && entry->_sig == sig) {
895 return false;
896 }
897 entry = entry->_next;
898 }
899
900 // No duplicate is found, allocate a new entry and fill it.
901 entry = new NameSigHash();
902 entry->_name = name;
903 entry->_sig = sig;
904
905 // Insert into hash table
906 entry->_next = table[index];
907 table[index] = entry;
908
909 return true;
910 }
911
912 // Side-effects: populates the _local_interfaces field
913 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
914 const int itfs_len,
915 ConstantPool* const cp,
916 bool* const has_nonstatic_concrete_methods,
917 TRAPS) {
918 assert(stream != NULL, "invariant");
919 assert(cp != NULL, "invariant");
920 assert(has_nonstatic_concrete_methods != NULL, "invariant");
921
922 if (itfs_len == 0) {
923 _local_interfaces = Universe::the_empty_klass_array();
924 } else {
925 assert(itfs_len > 0, "only called for len>0");
926 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
927
928 int index;
929 for (index = 0; index < itfs_len; index++) {
930 const u2 interface_index = stream->get_u2(CHECK);
931 Klass* interf;
932 check_property(
933 valid_klass_reference_at(interface_index),
934 "Interface name has bad constant pool index %u in class file %s",
935 interface_index, CHECK);
936 if (cp->tag_at(interface_index).is_klass()) {
937 interf = cp->resolved_klass_at(interface_index);
938 } else {
939 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
940
941 // Don't need to check legal name because it's checked when parsing constant pool.
942 // But need to make sure it's not an array type.
943 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
944 "Bad interface name in class file %s", CHECK);
945
946 // Call resolve_super so classcircularity is checked
947 interf = SystemDictionary::resolve_super_or_fail(
948 _class_name,
949 unresolved_klass,
950 Handle(THREAD, _loader_data->class_loader()),
951 _protection_domain,
952 false,
953 CHECK);
954 }
955
956 if (!interf->is_interface()) {
957 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
958 err_msg("class %s can not implement %s, because it is not an interface (%s)",
959 _class_name->as_klass_external_name(),
960 interf->external_name(),
961 interf->class_in_module_of_loader()));
962 }
963
964 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
965 *has_nonstatic_concrete_methods = true;
966 }
967 _local_interfaces->at_put(index, interf);
968 }
969
970 if (!_need_verify || itfs_len <= 1) {
971 return;
972 }
973
974 // Check if there's any duplicates in interfaces
975 ResourceMark rm(THREAD);
976 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
977 NameSigHash*,
978 HASH_ROW_SIZE);
979 initialize_hashtable(interface_names);
980 bool dup = false;
981 const Symbol* name = NULL;
982 {
983 debug_only(NoSafepointVerifier nsv;)
984 for (index = 0; index < itfs_len; index++) {
985 const Klass* const k = _local_interfaces->at(index);
986 name = InstanceKlass::cast(k)->name();
987 // If no duplicates, add (name, NULL) in hashtable interface_names.
988 if (!put_after_lookup(name, NULL, interface_names)) {
989 dup = true;
990 break;
991 }
992 }
993 }
994 if (dup) {
995 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
996 name->as_C_string(), CHECK);
997 }
998 }
999 }
1000
1001 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
1002 int constantvalue_index,
1003 int signature_index,
1004 TRAPS) const {
1005 // Make sure the constant pool entry is of a type appropriate to this field
1006 guarantee_property(
1007 (constantvalue_index > 0 &&
1008 constantvalue_index < cp->length()),
1009 "Bad initial value index %u in ConstantValue attribute in class file %s",
1010 constantvalue_index, CHECK);
1011
1012 const constantTag value_type = cp->tag_at(constantvalue_index);
1013 switch(cp->basic_type_for_signature_at(signature_index)) {
1014 case T_LONG: {
1015 guarantee_property(value_type.is_long(),
1016 "Inconsistent constant value type in class file %s",
1017 CHECK);
1018 break;
1019 }
1020 case T_FLOAT: {
1021 guarantee_property(value_type.is_float(),
1022 "Inconsistent constant value type in class file %s",
1023 CHECK);
1024 break;
1025 }
1026 case T_DOUBLE: {
1027 guarantee_property(value_type.is_double(),
1028 "Inconsistent constant value type in class file %s",
1029 CHECK);
1030 break;
1031 }
1032 case T_BYTE:
1033 case T_CHAR:
1034 case T_SHORT:
1035 case T_BOOLEAN:
1036 case T_INT: {
1037 guarantee_property(value_type.is_int(),
1038 "Inconsistent constant value type in class file %s",
1039 CHECK);
1040 break;
1041 }
1042 case T_OBJECT: {
1043 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1044 && value_type.is_string()),
1045 "Bad string initial value in class file %s",
1046 CHECK);
1047 break;
1048 }
1049 default: {
1050 classfile_parse_error("Unable to set initial value %u in class file %s",
1051 constantvalue_index,
1052 CHECK);
1053 }
1054 }
1055 }
1056
1057 class AnnotationCollector : public ResourceObj{
1058 public:
1059 enum Location { _in_field, _in_method, _in_class };
1060 enum ID {
1061 _unknown = 0,
1062 _method_CallerSensitive,
1063 _method_ForceInline,
1064 _method_DontInline,
1065 _method_InjectedProfile,
1066 _method_LambdaForm_Compiled,
1067 _method_LambdaForm_Hidden,
1068 _method_HotSpotIntrinsicCandidate,
1069 _jdk_internal_vm_annotation_Contended,
1070 _field_Stable,
1071 _jdk_internal_vm_annotation_ReservedStackAccess,
1072 _annotation_LIMIT
1073 };
1074 const Location _location;
1075 int _annotations_present;
1076 u2 _contended_group;
1077
1078 AnnotationCollector(Location location)
1079 : _location(location), _annotations_present(0)
1080 {
1081 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1082 }
1083 // If this annotation name has an ID, report it (or _none).
1084 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1085 // Set the annotation name:
1086 void set_annotation(ID id) {
1087 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1088 _annotations_present |= nth_bit((int)id);
1089 }
1090
1091 void remove_annotation(ID id) {
1092 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1093 _annotations_present &= ~nth_bit((int)id);
1094 }
1095
1096 // Report if the annotation is present.
1097 bool has_any_annotations() const { return _annotations_present != 0; }
1098 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1099
1100 void set_contended_group(u2 group) { _contended_group = group; }
1101 u2 contended_group() const { return _contended_group; }
1102
1103 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1104
1105 void set_stable(bool stable) { set_annotation(_field_Stable); }
1106 bool is_stable() const { return has_annotation(_field_Stable); }
1107 };
1108
1109 // This class also doubles as a holder for metadata cleanup.
1110 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1111 private:
1112 ClassLoaderData* _loader_data;
1113 AnnotationArray* _field_annotations;
1114 AnnotationArray* _field_type_annotations;
1115 public:
1116 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1117 AnnotationCollector(_in_field),
1118 _loader_data(loader_data),
1119 _field_annotations(NULL),
1120 _field_type_annotations(NULL) {}
1121 ~FieldAnnotationCollector();
1122 void apply_to(FieldInfo* f);
1123 AnnotationArray* field_annotations() { return _field_annotations; }
1124 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1125
1126 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1127 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1128 };
1129
1130 class MethodAnnotationCollector : public AnnotationCollector{
1131 public:
1132 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1133 void apply_to(const methodHandle& m);
1134 };
1135
1136 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1137 public:
1138 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1139 void apply_to(InstanceKlass* ik);
1140 };
1141
1142
1143 static int skip_annotation_value(const u1*, int, int); // fwd decl
1144
1145 // Safely increment index by val if does not pass limit
1146 #define SAFE_ADD(index, limit, val) \
1147 if (index >= limit - val) return limit; \
1148 index += val;
1149
1150 // Skip an annotation. Return >=limit if there is any problem.
1151 static int skip_annotation(const u1* buffer, int limit, int index) {
1152 assert(buffer != NULL, "invariant");
1153 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1154 // value := switch (tag:u1) { ... }
1155 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1156 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1157 while (--nmem >= 0 && index < limit) {
1158 SAFE_ADD(index, limit, 2); // skip member
1159 index = skip_annotation_value(buffer, limit, index);
1160 }
1161 return index;
1162 }
1163
1164 // Skip an annotation value. Return >=limit if there is any problem.
1165 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1166 assert(buffer != NULL, "invariant");
1167
1168 // value := switch (tag:u1) {
1169 // case B, C, I, S, Z, D, F, J, c: con:u2;
1170 // case e: e_class:u2 e_name:u2;
1171 // case s: s_con:u2;
1172 // case [: do(nval:u2) {value};
1173 // case @: annotation;
1174 // case s: s_con:u2;
1175 // }
1176 SAFE_ADD(index, limit, 1); // read tag
1177 const u1 tag = buffer[index - 1];
1178 switch (tag) {
1179 case 'B':
1180 case 'C':
1181 case 'I':
1182 case 'S':
1183 case 'Z':
1184 case 'D':
1185 case 'F':
1186 case 'J':
1187 case 'c':
1188 case 's':
1189 SAFE_ADD(index, limit, 2); // skip con or s_con
1190 break;
1191 case 'e':
1192 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1193 break;
1194 case '[':
1195 {
1196 SAFE_ADD(index, limit, 2); // read nval
1197 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1198 while (--nval >= 0 && index < limit) {
1199 index = skip_annotation_value(buffer, limit, index);
1200 }
1201 }
1202 break;
1203 case '@':
1204 index = skip_annotation(buffer, limit, index);
1205 break;
1206 default:
1207 return limit; // bad tag byte
1208 }
1209 return index;
1210 }
1211
1212 // Sift through annotations, looking for those significant to the VM:
1213 static void parse_annotations(const ConstantPool* const cp,
1214 const u1* buffer, int limit,
1215 AnnotationCollector* coll,
1216 ClassLoaderData* loader_data,
1217 TRAPS) {
1218
1219 assert(cp != NULL, "invariant");
1220 assert(buffer != NULL, "invariant");
1221 assert(coll != NULL, "invariant");
1222 assert(loader_data != NULL, "invariant");
1223
1224 // annotations := do(nann:u2) {annotation}
1225 int index = 2; // read nann
1226 if (index >= limit) return;
1227 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1228 enum { // initial annotation layout
1229 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1230 count_off = 2, // u2 such as 1 (one value)
1231 member_off = 4, // utf8 such as 'value'
1232 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1233 e_tag_val = 'e',
1234 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1235 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1236 e_size = 11, // end of 'e' annotation
1237 c_tag_val = 'c', // payload is type
1238 c_con_off = 7, // utf8 payload, such as 'I'
1239 c_size = 9, // end of 'c' annotation
1240 s_tag_val = 's', // payload is String
1241 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1242 s_size = 9,
1243 min_size = 6 // smallest possible size (zero members)
1244 };
1245 // Cannot add min_size to index in case of overflow MAX_INT
1246 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1247 int index0 = index;
1248 index = skip_annotation(buffer, limit, index);
1249 const u1* const abase = buffer + index0;
1250 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1251 const int count = Bytes::get_Java_u2((address)abase + count_off);
1252 const Symbol* const aname = check_symbol_at(cp, atype);
1253 if (aname == NULL) break; // invalid annotation name
1254 const Symbol* member = NULL;
1255 if (count >= 1) {
1256 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1257 member = check_symbol_at(cp, member_index);
1258 if (member == NULL) break; // invalid member name
1259 }
1260
1261 // Here is where parsing particular annotations will take place.
1262 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1263 if (AnnotationCollector::_unknown == id) continue;
1264 coll->set_annotation(id);
1265
1266 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1267 // @Contended can optionally specify the contention group.
1268 //
1269 // Contended group defines the equivalence class over the fields:
1270 // the fields within the same contended group are not treated distinct.
1271 // The only exception is default group, which does not incur the
1272 // equivalence. Naturally, contention group for classes is meaningless.
1273 //
1274 // While the contention group is specified as String, annotation
1275 // values are already interned, and we might as well use the constant
1276 // pool index as the group tag.
1277 //
1278 u2 group_index = 0; // default contended group
1279 if (count == 1
1280 && s_size == (index - index0) // match size
1281 && s_tag_val == *(abase + tag_off)
1282 && member == vmSymbols::value_name()) {
1283 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1284 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1285 group_index = 0; // default contended group
1286 }
1287 }
1288 coll->set_contended_group(group_index);
1289 }
1290 }
1291 }
1292
1293
1294 // Parse attributes for a field.
1295 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1296 u2 attributes_count,
1297 bool is_static, u2 signature_index,
1298 u2* const constantvalue_index_addr,
1299 bool* const is_synthetic_addr,
1300 u2* const generic_signature_index_addr,
1301 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1302 TRAPS) {
1303 assert(cfs != NULL, "invariant");
1304 assert(constantvalue_index_addr != NULL, "invariant");
1305 assert(is_synthetic_addr != NULL, "invariant");
1306 assert(generic_signature_index_addr != NULL, "invariant");
1307 assert(parsed_annotations != NULL, "invariant");
1308 assert(attributes_count > 0, "attributes_count should be greater than 0");
1309
1310 u2 constantvalue_index = 0;
1311 u2 generic_signature_index = 0;
1312 bool is_synthetic = false;
1313 const u1* runtime_visible_annotations = NULL;
1314 int runtime_visible_annotations_length = 0;
1315 const u1* runtime_invisible_annotations = NULL;
1316 int runtime_invisible_annotations_length = 0;
1317 const u1* runtime_visible_type_annotations = NULL;
1318 int runtime_visible_type_annotations_length = 0;
1319 const u1* runtime_invisible_type_annotations = NULL;
1320 int runtime_invisible_type_annotations_length = 0;
1321 bool runtime_invisible_annotations_exists = false;
1322 bool runtime_invisible_type_annotations_exists = false;
1323 const ConstantPool* const cp = _cp;
1324
1325 while (attributes_count--) {
1326 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1327 const u2 attribute_name_index = cfs->get_u2_fast();
1328 const u4 attribute_length = cfs->get_u4_fast();
1329 check_property(valid_symbol_at(attribute_name_index),
1330 "Invalid field attribute index %u in class file %s",
1331 attribute_name_index,
1332 CHECK);
1333
1334 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1335 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1336 // ignore if non-static
1337 if (constantvalue_index != 0) {
1338 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1339 }
1340 check_property(
1341 attribute_length == 2,
1342 "Invalid ConstantValue field attribute length %u in class file %s",
1343 attribute_length, CHECK);
1344
1345 constantvalue_index = cfs->get_u2(CHECK);
1346 if (_need_verify) {
1347 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1348 }
1349 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1350 if (attribute_length != 0) {
1351 classfile_parse_error(
1352 "Invalid Synthetic field attribute length %u in class file %s",
1353 attribute_length, CHECK);
1354 }
1355 is_synthetic = true;
1356 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1357 if (attribute_length != 0) {
1358 classfile_parse_error(
1359 "Invalid Deprecated field attribute length %u in class file %s",
1360 attribute_length, CHECK);
1361 }
1362 } else if (_major_version >= JAVA_1_5_VERSION) {
1363 if (attribute_name == vmSymbols::tag_signature()) {
1364 if (generic_signature_index != 0) {
1365 classfile_parse_error(
1366 "Multiple Signature attributes for field in class file %s", CHECK);
1367 }
1368 if (attribute_length != 2) {
1369 classfile_parse_error(
1370 "Wrong size %u for field's Signature attribute in class file %s",
1371 attribute_length, CHECK);
1372 }
1373 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1374 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1375 if (runtime_visible_annotations != NULL) {
1376 classfile_parse_error(
1377 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1378 }
1379 runtime_visible_annotations_length = attribute_length;
1380 runtime_visible_annotations = cfs->current();
1381 assert(runtime_visible_annotations != NULL, "null visible annotations");
1382 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1383 parse_annotations(cp,
1384 runtime_visible_annotations,
1385 runtime_visible_annotations_length,
1386 parsed_annotations,
1387 _loader_data,
1388 CHECK);
1389 cfs->skip_u1_fast(runtime_visible_annotations_length);
1390 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1391 if (runtime_invisible_annotations_exists) {
1392 classfile_parse_error(
1393 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1394 }
1395 runtime_invisible_annotations_exists = true;
1396 if (PreserveAllAnnotations) {
1397 runtime_invisible_annotations_length = attribute_length;
1398 runtime_invisible_annotations = cfs->current();
1399 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1400 }
1401 cfs->skip_u1(attribute_length, CHECK);
1402 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1403 if (runtime_visible_type_annotations != NULL) {
1404 classfile_parse_error(
1405 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1406 }
1407 runtime_visible_type_annotations_length = attribute_length;
1408 runtime_visible_type_annotations = cfs->current();
1409 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1410 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1411 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1412 if (runtime_invisible_type_annotations_exists) {
1413 classfile_parse_error(
1414 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1415 } else {
1416 runtime_invisible_type_annotations_exists = true;
1417 }
1418 if (PreserveAllAnnotations) {
1419 runtime_invisible_type_annotations_length = attribute_length;
1420 runtime_invisible_type_annotations = cfs->current();
1421 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1422 }
1423 cfs->skip_u1(attribute_length, CHECK);
1424 } else {
1425 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1426 }
1427 } else {
1428 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1429 }
1430 }
1431
1432 *constantvalue_index_addr = constantvalue_index;
1433 *is_synthetic_addr = is_synthetic;
1434 *generic_signature_index_addr = generic_signature_index;
1435 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1436 runtime_visible_annotations_length,
1437 runtime_invisible_annotations,
1438 runtime_invisible_annotations_length,
1439 CHECK);
1440 parsed_annotations->set_field_annotations(a);
1441 a = assemble_annotations(runtime_visible_type_annotations,
1442 runtime_visible_type_annotations_length,
1443 runtime_invisible_type_annotations,
1444 runtime_invisible_type_annotations_length,
1445 CHECK);
1446 parsed_annotations->set_field_type_annotations(a);
1447 return;
1448 }
1449
1450
1451 // Field allocation types. Used for computing field offsets.
1452
1453 enum FieldAllocationType {
1454 STATIC_OOP, // Oops
1455 STATIC_BYTE, // Boolean, Byte, char
1456 STATIC_SHORT, // shorts
1457 STATIC_WORD, // ints
1458 STATIC_DOUBLE, // aligned long or double
1459 NONSTATIC_OOP,
1460 NONSTATIC_BYTE,
1461 NONSTATIC_SHORT,
1462 NONSTATIC_WORD,
1463 NONSTATIC_DOUBLE,
1464 MAX_FIELD_ALLOCATION_TYPE,
1465 BAD_ALLOCATION_TYPE = -1
1466 };
1467
1468 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1469 BAD_ALLOCATION_TYPE, // 0
1470 BAD_ALLOCATION_TYPE, // 1
1471 BAD_ALLOCATION_TYPE, // 2
1472 BAD_ALLOCATION_TYPE, // 3
1473 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1474 NONSTATIC_SHORT, // T_CHAR = 5,
1475 NONSTATIC_WORD, // T_FLOAT = 6,
1476 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1477 NONSTATIC_BYTE, // T_BYTE = 8,
1478 NONSTATIC_SHORT, // T_SHORT = 9,
1479 NONSTATIC_WORD, // T_INT = 10,
1480 NONSTATIC_DOUBLE, // T_LONG = 11,
1481 NONSTATIC_OOP, // T_OBJECT = 12,
1482 NONSTATIC_OOP, // T_ARRAY = 13,
1483 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1484 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1485 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1486 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1487 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1488 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1489 BAD_ALLOCATION_TYPE, // 0
1490 BAD_ALLOCATION_TYPE, // 1
1491 BAD_ALLOCATION_TYPE, // 2
1492 BAD_ALLOCATION_TYPE, // 3
1493 STATIC_BYTE , // T_BOOLEAN = 4,
1494 STATIC_SHORT, // T_CHAR = 5,
1495 STATIC_WORD, // T_FLOAT = 6,
1496 STATIC_DOUBLE, // T_DOUBLE = 7,
1497 STATIC_BYTE, // T_BYTE = 8,
1498 STATIC_SHORT, // T_SHORT = 9,
1499 STATIC_WORD, // T_INT = 10,
1500 STATIC_DOUBLE, // T_LONG = 11,
1501 STATIC_OOP, // T_OBJECT = 12,
1502 STATIC_OOP, // T_ARRAY = 13,
1503 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1504 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1505 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1506 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1507 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1508 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1509 };
1510
1511 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1512 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1513 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1514 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1515 return result;
1516 }
1517
1518 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1519 public:
1520 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1521
1522 FieldAllocationCount() {
1523 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1524 count[i] = 0;
1525 }
1526 }
1527
1528 FieldAllocationType update(bool is_static, BasicType type) {
1529 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1530 if (atype != BAD_ALLOCATION_TYPE) {
1531 // Make sure there is no overflow with injected fields.
1532 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1533 count[atype]++;
1534 }
1535 return atype;
1536 }
1537 };
1538
1539 // Side-effects: populates the _fields, _fields_annotations,
1540 // _fields_type_annotations fields
1541 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1542 bool is_interface,
1543 FieldAllocationCount* const fac,
1544 ConstantPool* cp,
1545 const int cp_size,
1546 u2* const java_fields_count_ptr,
1547 TRAPS) {
1548
1549 assert(cfs != NULL, "invariant");
1550 assert(fac != NULL, "invariant");
1551 assert(cp != NULL, "invariant");
1552 assert(java_fields_count_ptr != NULL, "invariant");
1553
1554 assert(NULL == _fields, "invariant");
1555 assert(NULL == _fields_annotations, "invariant");
1556 assert(NULL == _fields_type_annotations, "invariant");
1557
1558 cfs->guarantee_more(2, CHECK); // length
1559 const u2 length = cfs->get_u2_fast();
1560 *java_fields_count_ptr = length;
1561
1562 int num_injected = 0;
1563 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1564 &num_injected);
1565 const int total_fields = length + num_injected;
1566
1567 // The field array starts with tuples of shorts
1568 // [access, name index, sig index, initial value index, byte offset].
1569 // A generic signature slot only exists for field with generic
1570 // signature attribute. And the access flag is set with
1571 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1572 // signature slots are at the end of the field array and after all
1573 // other fields data.
1574 //
1575 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1576 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1577 // ...
1578 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1579 // [generic signature index]
1580 // [generic signature index]
1581 // ...
1582 //
1583 // Allocate a temporary resource array for field data. For each field,
1584 // a slot is reserved in the temporary array for the generic signature
1585 // index. After parsing all fields, the data are copied to a permanent
1586 // array and any unused slots will be discarded.
1587 ResourceMark rm(THREAD);
1588 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1589 u2,
1590 total_fields * (FieldInfo::field_slots + 1));
1591
1592 // The generic signature slots start after all other fields' data.
1593 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1594 int num_generic_signature = 0;
1595 for (int n = 0; n < length; n++) {
1596 // access_flags, name_index, descriptor_index, attributes_count
1597 cfs->guarantee_more(8, CHECK);
1598
1599 AccessFlags access_flags;
1600 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1601 verify_legal_field_modifiers(flags, is_interface, CHECK);
1602 access_flags.set_flags(flags);
1603
1604 const u2 name_index = cfs->get_u2_fast();
1605 check_property(valid_symbol_at(name_index),
1606 "Invalid constant pool index %u for field name in class file %s",
1607 name_index, CHECK);
1608 const Symbol* const name = cp->symbol_at(name_index);
1609 verify_legal_field_name(name, CHECK);
1610
1611 const u2 signature_index = cfs->get_u2_fast();
1612 check_property(valid_symbol_at(signature_index),
1613 "Invalid constant pool index %u for field signature in class file %s",
1614 signature_index, CHECK);
1615 const Symbol* const sig = cp->symbol_at(signature_index);
1616 verify_legal_field_signature(name, sig, CHECK);
1617
1618 u2 constantvalue_index = 0;
1619 bool is_synthetic = false;
1620 u2 generic_signature_index = 0;
1621 const bool is_static = access_flags.is_static();
1622 FieldAnnotationCollector parsed_annotations(_loader_data);
1623
1624 const u2 attributes_count = cfs->get_u2_fast();
1625 if (attributes_count > 0) {
1626 parse_field_attributes(cfs,
1627 attributes_count,
1628 is_static,
1629 signature_index,
1630 &constantvalue_index,
1631 &is_synthetic,
1632 &generic_signature_index,
1633 &parsed_annotations,
1634 CHECK);
1635
1636 if (parsed_annotations.field_annotations() != NULL) {
1637 if (_fields_annotations == NULL) {
1638 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1639 _loader_data, length, NULL,
1640 CHECK);
1641 }
1642 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1643 parsed_annotations.set_field_annotations(NULL);
1644 }
1645 if (parsed_annotations.field_type_annotations() != NULL) {
1646 if (_fields_type_annotations == NULL) {
1647 _fields_type_annotations =
1648 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1649 length,
1650 NULL,
1651 CHECK);
1652 }
1653 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1654 parsed_annotations.set_field_type_annotations(NULL);
1655 }
1656
1657 if (is_synthetic) {
1658 access_flags.set_is_synthetic();
1659 }
1660 if (generic_signature_index != 0) {
1661 access_flags.set_field_has_generic_signature();
1662 fa[generic_signature_slot] = generic_signature_index;
1663 generic_signature_slot ++;
1664 num_generic_signature ++;
1665 }
1666 }
1667
1668 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1669 field->initialize(access_flags.as_short(),
1670 name_index,
1671 signature_index,
1672 constantvalue_index);
1673 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1674
1675 // Remember how many oops we encountered and compute allocation type
1676 const FieldAllocationType atype = fac->update(is_static, type);
1677 field->set_allocation_type(atype);
1678
1679 // After field is initialized with type, we can augment it with aux info
1680 if (parsed_annotations.has_any_annotations())
1681 parsed_annotations.apply_to(field);
1682 }
1683
1684 int index = length;
1685 if (num_injected != 0) {
1686 for (int n = 0; n < num_injected; n++) {
1687 // Check for duplicates
1688 if (injected[n].may_be_java) {
1689 const Symbol* const name = injected[n].name();
1690 const Symbol* const signature = injected[n].signature();
1691 bool duplicate = false;
1692 for (int i = 0; i < length; i++) {
1693 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1694 if (name == cp->symbol_at(f->name_index()) &&
1695 signature == cp->symbol_at(f->signature_index())) {
1696 // Symbol is desclared in Java so skip this one
1697 duplicate = true;
1698 break;
1699 }
1700 }
1701 if (duplicate) {
1702 // These will be removed from the field array at the end
1703 continue;
1704 }
1705 }
1706
1707 // Injected field
1708 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1709 field->initialize(JVM_ACC_FIELD_INTERNAL,
1710 injected[n].name_index,
1711 injected[n].signature_index,
1712 0);
1713
1714 const BasicType type = FieldType::basic_type(injected[n].signature());
1715
1716 // Remember how many oops we encountered and compute allocation type
1717 const FieldAllocationType atype = fac->update(false, type);
1718 field->set_allocation_type(atype);
1719 index++;
1720 }
1721 }
1722
1723 assert(NULL == _fields, "invariant");
1724
1725 _fields =
1726 MetadataFactory::new_array<u2>(_loader_data,
1727 index * FieldInfo::field_slots + num_generic_signature,
1728 CHECK);
1729 // Sometimes injected fields already exist in the Java source so
1730 // the fields array could be too long. In that case the
1731 // fields array is trimed. Also unused slots that were reserved
1732 // for generic signature indexes are discarded.
1733 {
1734 int i = 0;
1735 for (; i < index * FieldInfo::field_slots; i++) {
1736 _fields->at_put(i, fa[i]);
1737 }
1738 for (int j = total_fields * FieldInfo::field_slots;
1739 j < generic_signature_slot; j++) {
1740 _fields->at_put(i++, fa[j]);
1741 }
1742 assert(_fields->length() == i, "");
1743 }
1744
1745 if (_need_verify && length > 1) {
1746 // Check duplicated fields
1747 ResourceMark rm(THREAD);
1748 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1749 THREAD, NameSigHash*, HASH_ROW_SIZE);
1750 initialize_hashtable(names_and_sigs);
1751 bool dup = false;
1752 const Symbol* name = NULL;
1753 const Symbol* sig = NULL;
1754 {
1755 debug_only(NoSafepointVerifier nsv;)
1756 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1757 name = fs.name();
1758 sig = fs.signature();
1759 // If no duplicates, add name/signature in hashtable names_and_sigs.
1760 if (!put_after_lookup(name, sig, names_and_sigs)) {
1761 dup = true;
1762 break;
1763 }
1764 }
1765 }
1766 if (dup) {
1767 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1768 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1769 }
1770 }
1771 }
1772
1773
1774 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1775 u4 code_length,
1776 u4 exception_table_length,
1777 TRAPS) {
1778 assert(cfs != NULL, "invariant");
1779
1780 const unsafe_u2* const exception_table_start = cfs->current();
1781 assert(exception_table_start != NULL, "null exception table");
1782
1783 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1784 // end_pc,
1785 // handler_pc,
1786 // catch_type_index
1787
1788 // Will check legal target after parsing code array in verifier.
1789 if (_need_verify) {
1790 for (unsigned int i = 0; i < exception_table_length; i++) {
1791 const u2 start_pc = cfs->get_u2_fast();
1792 const u2 end_pc = cfs->get_u2_fast();
1793 const u2 handler_pc = cfs->get_u2_fast();
1794 const u2 catch_type_index = cfs->get_u2_fast();
1795 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1796 "Illegal exception table range in class file %s",
1797 CHECK_NULL);
1798 guarantee_property(handler_pc < code_length,
1799 "Illegal exception table handler in class file %s",
1800 CHECK_NULL);
1801 if (catch_type_index != 0) {
1802 guarantee_property(valid_klass_reference_at(catch_type_index),
1803 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1804 }
1805 }
1806 } else {
1807 cfs->skip_u2_fast(exception_table_length * 4);
1808 }
1809 return exception_table_start;
1810 }
1811
1812 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1813 u4 code_length,
1814 CompressedLineNumberWriteStream**const write_stream,
1815 TRAPS) {
1816
1817 const ClassFileStream* const cfs = _stream;
1818 unsigned int num_entries = cfs->get_u2(CHECK);
1819
1820 // Each entry is a u2 start_pc, and a u2 line_number
1821 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1822
1823 // Verify line number attribute and table length
1824 check_property(
1825 code_attribute_length == sizeof(u2) + length_in_bytes,
1826 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1827
1828 cfs->guarantee_more(length_in_bytes, CHECK);
1829
1830 if ((*write_stream) == NULL) {
1831 if (length_in_bytes > fixed_buffer_size) {
1832 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1833 } else {
1834 (*write_stream) = new CompressedLineNumberWriteStream(
1835 _linenumbertable_buffer, fixed_buffer_size);
1836 }
1837 }
1838
1839 while (num_entries-- > 0) {
1840 const u2 bci = cfs->get_u2_fast(); // start_pc
1841 const u2 line = cfs->get_u2_fast(); // line_number
1842 guarantee_property(bci < code_length,
1843 "Invalid pc in LineNumberTable in class file %s", CHECK);
1844 (*write_stream)->write_pair(bci, line);
1845 }
1846 }
1847
1848
1849 class LVT_Hash : public AllStatic {
1850 public:
1851
1852 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1853 /*
1854 * 3-tuple start_bci/length/slot has to be unique key,
1855 * so the following comparison seems to be redundant:
1856 * && elem->name_cp_index == entry->_elem->name_cp_index
1857 */
1858 return (e0.start_bci == e1.start_bci &&
1859 e0.length == e1.length &&
1860 e0.name_cp_index == e1.name_cp_index &&
1861 e0.slot == e1.slot);
1862 }
1863
1864 static unsigned int hash(LocalVariableTableElement const& e0) {
1865 unsigned int raw_hash = e0.start_bci;
1866
1867 raw_hash = e0.length + raw_hash * 37;
1868 raw_hash = e0.name_cp_index + raw_hash * 37;
1869 raw_hash = e0.slot + raw_hash * 37;
1870
1871 return raw_hash;
1872 }
1873 };
1874
1875
1876 // Class file LocalVariableTable elements.
1877 class Classfile_LVT_Element {
1878 public:
1879 u2 start_bci;
1880 u2 length;
1881 u2 name_cp_index;
1882 u2 descriptor_cp_index;
1883 u2 slot;
1884 };
1885
1886 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1887 LocalVariableTableElement* const lvt) {
1888 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1889 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1890 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1891 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1892 lvt->signature_cp_index = 0;
1893 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1894 }
1895
1896 // Function is used to parse both attributes:
1897 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1898 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1899 u4 code_length,
1900 u2 max_locals,
1901 u4 code_attribute_length,
1902 u2* const localvariable_table_length,
1903 bool isLVTT,
1904 TRAPS) {
1905 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1906 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1907 const unsigned int size =
1908 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1909
1910 const ConstantPool* const cp = _cp;
1911
1912 // Verify local variable table attribute has right length
1913 if (_need_verify) {
1914 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1915 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1916 }
1917
1918 const unsafe_u2* const localvariable_table_start = cfs->current();
1919 assert(localvariable_table_start != NULL, "null local variable table");
1920 if (!_need_verify) {
1921 cfs->skip_u2_fast(size);
1922 } else {
1923 cfs->guarantee_more(size * 2, CHECK_NULL);
1924 for(int i = 0; i < (*localvariable_table_length); i++) {
1925 const u2 start_pc = cfs->get_u2_fast();
1926 const u2 length = cfs->get_u2_fast();
1927 const u2 name_index = cfs->get_u2_fast();
1928 const u2 descriptor_index = cfs->get_u2_fast();
1929 const u2 index = cfs->get_u2_fast();
1930 // Assign to a u4 to avoid overflow
1931 const u4 end_pc = (u4)start_pc + (u4)length;
1932
1933 if (start_pc >= code_length) {
1934 classfile_parse_error(
1935 "Invalid start_pc %u in %s in class file %s",
1936 start_pc, tbl_name, CHECK_NULL);
1937 }
1938 if (end_pc > code_length) {
1939 classfile_parse_error(
1940 "Invalid length %u in %s in class file %s",
1941 length, tbl_name, CHECK_NULL);
1942 }
1943 const int cp_size = cp->length();
1944 guarantee_property(valid_symbol_at(name_index),
1945 "Name index %u in %s has bad constant type in class file %s",
1946 name_index, tbl_name, CHECK_NULL);
1947 guarantee_property(valid_symbol_at(descriptor_index),
1948 "Signature index %u in %s has bad constant type in class file %s",
1949 descriptor_index, tbl_name, CHECK_NULL);
1950
1951 const Symbol* const name = cp->symbol_at(name_index);
1952 const Symbol* const sig = cp->symbol_at(descriptor_index);
1953 verify_legal_field_name(name, CHECK_NULL);
1954 u2 extra_slot = 0;
1955 if (!isLVTT) {
1956 verify_legal_field_signature(name, sig, CHECK_NULL);
1957
1958 // 4894874: check special cases for double and long local variables
1959 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1960 sig == vmSymbols::type_signature(T_LONG)) {
1961 extra_slot = 1;
1962 }
1963 }
1964 guarantee_property((index + extra_slot) < max_locals,
1965 "Invalid index %u in %s in class file %s",
1966 index, tbl_name, CHECK_NULL);
1967 }
1968 }
1969 return localvariable_table_start;
1970 }
1971
1972
1973 void ClassFileParser::parse_type_array(u2 array_length,
1974 u4 code_length,
1975 u4* const u1_index,
1976 u4* const u2_index,
1977 u1* const u1_array,
1978 u2* const u2_array,
1979 TRAPS) {
1980 const ClassFileStream* const cfs = _stream;
1981 u2 index = 0; // index in the array with long/double occupying two slots
1982 u4 i1 = *u1_index;
1983 u4 i2 = *u2_index + 1;
1984 for(int i = 0; i < array_length; i++) {
1985 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1986 index++;
1987 if (tag == ITEM_Long || tag == ITEM_Double) {
1988 index++;
1989 } else if (tag == ITEM_Object) {
1990 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1991 guarantee_property(valid_klass_reference_at(class_index),
1992 "Bad class index %u in StackMap in class file %s",
1993 class_index, CHECK);
1994 } else if (tag == ITEM_Uninitialized) {
1995 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1996 guarantee_property(
1997 offset < code_length,
1998 "Bad uninitialized type offset %u in StackMap in class file %s",
1999 offset, CHECK);
2000 } else {
2001 guarantee_property(
2002 tag <= (u1)ITEM_Uninitialized,
2003 "Unknown variable type %u in StackMap in class file %s",
2004 tag, CHECK);
2005 }
2006 }
2007 u2_array[*u2_index] = index;
2008 *u1_index = i1;
2009 *u2_index = i2;
2010 }
2011
2012 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
2013 u4 code_attribute_length,
2014 bool need_verify,
2015 TRAPS) {
2016 assert(cfs != NULL, "invariant");
2017
2018 if (0 == code_attribute_length) {
2019 return NULL;
2020 }
2021
2022 const u1* const stackmap_table_start = cfs->current();
2023 assert(stackmap_table_start != NULL, "null stackmap table");
2024
2025 // check code_attribute_length first
2026 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2027
2028 if (!need_verify && !DumpSharedSpaces) {
2029 return NULL;
2030 }
2031 return stackmap_table_start;
2032 }
2033
2034 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2035 u2* const checked_exceptions_length,
2036 u4 method_attribute_length,
2037 TRAPS) {
2038 assert(cfs != NULL, "invariant");
2039 assert(checked_exceptions_length != NULL, "invariant");
2040
2041 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2042 *checked_exceptions_length = cfs->get_u2_fast();
2043 const unsigned int size =
2044 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2045 const unsafe_u2* const checked_exceptions_start = cfs->current();
2046 assert(checked_exceptions_start != NULL, "null checked exceptions");
2047 if (!_need_verify) {
2048 cfs->skip_u2_fast(size);
2049 } else {
2050 // Verify each value in the checked exception table
2051 u2 checked_exception;
2052 const u2 len = *checked_exceptions_length;
2053 cfs->guarantee_more(2 * len, CHECK_NULL);
2054 for (int i = 0; i < len; i++) {
2055 checked_exception = cfs->get_u2_fast();
2056 check_property(
2057 valid_klass_reference_at(checked_exception),
2058 "Exception name has bad type at constant pool %u in class file %s",
2059 checked_exception, CHECK_NULL);
2060 }
2061 }
2062 // check exceptions attribute length
2063 if (_need_verify) {
2064 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2065 sizeof(u2) * size),
2066 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2067 }
2068 return checked_exceptions_start;
2069 }
2070
2071 void ClassFileParser::throwIllegalSignature(const char* type,
2072 const Symbol* name,
2073 const Symbol* sig,
2074 TRAPS) const {
2075 assert(name != NULL, "invariant");
2076 assert(sig != NULL, "invariant");
2077
2078 ResourceMark rm(THREAD);
2079 Exceptions::fthrow(THREAD_AND_LOCATION,
2080 vmSymbols::java_lang_ClassFormatError(),
2081 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2082 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2083 }
2084
2085 AnnotationCollector::ID
2086 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2087 const Symbol* name) {
2088 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2089 // Privileged code can use all annotations. Other code silently drops some.
2090 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2091 loader_data->is_platform_class_loader_data() ||
2092 loader_data->is_anonymous();
2093 switch (sid) {
2094 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2095 if (_location != _in_method) break; // only allow for methods
2096 if (!privileged) break; // only allow in privileged code
2097 return _method_CallerSensitive;
2098 }
2099 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2100 if (_location != _in_method) break; // only allow for methods
2101 if (!privileged) break; // only allow in privileged code
2102 return _method_ForceInline;
2103 }
2104 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2105 if (_location != _in_method) break; // only allow for methods
2106 if (!privileged) break; // only allow in privileged code
2107 return _method_DontInline;
2108 }
2109 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2110 if (_location != _in_method) break; // only allow for methods
2111 if (!privileged) break; // only allow in privileged code
2112 return _method_InjectedProfile;
2113 }
2114 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2115 if (_location != _in_method) break; // only allow for methods
2116 if (!privileged) break; // only allow in privileged code
2117 return _method_LambdaForm_Compiled;
2118 }
2119 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
2120 if (_location != _in_method) break; // only allow for methods
2121 if (!privileged) break; // only allow in privileged code
2122 return _method_LambdaForm_Hidden;
2123 }
2124 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2125 if (_location != _in_method) break; // only allow for methods
2126 if (!privileged) break; // only allow in privileged code
2127 return _method_HotSpotIntrinsicCandidate;
2128 }
2129 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2130 if (_location != _in_field) break; // only allow for fields
2131 if (!privileged) break; // only allow in privileged code
2132 return _field_Stable;
2133 }
2134 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2135 if (_location != _in_field && _location != _in_class) {
2136 break; // only allow for fields and classes
2137 }
2138 if (!EnableContended || (RestrictContended && !privileged)) {
2139 break; // honor privileges
2140 }
2141 return _jdk_internal_vm_annotation_Contended;
2142 }
2143 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2144 if (_location != _in_method) break; // only allow for methods
2145 if (RestrictReservedStack && !privileged) break; // honor privileges
2146 return _jdk_internal_vm_annotation_ReservedStackAccess;
2147 }
2148 default: {
2149 break;
2150 }
2151 }
2152 return AnnotationCollector::_unknown;
2153 }
2154
2155 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2156 if (is_contended())
2157 f->set_contended_group(contended_group());
2158 if (is_stable())
2159 f->set_stable(true);
2160 }
2161
2162 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2163 // If there's an error deallocate metadata for field annotations
2164 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2165 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2166 }
2167
2168 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2169 if (has_annotation(_method_CallerSensitive))
2170 m->set_caller_sensitive(true);
2171 if (has_annotation(_method_ForceInline))
2172 m->set_force_inline(true);
2173 if (has_annotation(_method_DontInline))
2174 m->set_dont_inline(true);
2175 if (has_annotation(_method_InjectedProfile))
2176 m->set_has_injected_profile(true);
2177 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2178 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2179 if (has_annotation(_method_LambdaForm_Hidden))
2180 m->set_hidden(true);
2181 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2182 m->set_intrinsic_candidate(true);
2183 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2184 m->set_has_reserved_stack_access(true);
2185 }
2186
2187 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2188 assert(ik != NULL, "invariant");
2189 ik->set_is_contended(is_contended());
2190 }
2191
2192 #define MAX_ARGS_SIZE 255
2193 #define MAX_CODE_SIZE 65535
2194 #define INITIAL_MAX_LVT_NUMBER 256
2195
2196 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2197 *
2198 * Rules for LVT's and LVTT's are:
2199 * - There can be any number of LVT's and LVTT's.
2200 * - If there are n LVT's, it is the same as if there was just
2201 * one LVT containing all the entries from the n LVT's.
2202 * - There may be no more than one LVT entry per local variable.
2203 * Two LVT entries are 'equal' if these fields are the same:
2204 * start_pc, length, name, slot
2205 * - There may be no more than one LVTT entry per each LVT entry.
2206 * Each LVTT entry has to match some LVT entry.
2207 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2208 */
2209 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2210 int lvt_cnt,
2211 u2* const localvariable_table_length,
2212 const unsafe_u2** const localvariable_table_start,
2213 int lvtt_cnt,
2214 u2* const localvariable_type_table_length,
2215 const unsafe_u2** const localvariable_type_table_start,
2216 TRAPS) {
2217
2218 ResourceMark rm(THREAD);
2219
2220 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2221 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2222
2223 LVT_HashTable* const table = new LVT_HashTable();
2224
2225 // To fill LocalVariableTable in
2226 const Classfile_LVT_Element* cf_lvt;
2227 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2228
2229 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2230 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2231 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2232 copy_lvt_element(&cf_lvt[idx], lvt);
2233 // If no duplicates, add LVT elem in hashtable.
2234 if (table->put(*lvt, lvt) == false
2235 && _need_verify
2236 && _major_version >= JAVA_1_5_VERSION) {
2237 classfile_parse_error("Duplicated LocalVariableTable attribute "
2238 "entry for '%s' in class file %s",
2239 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2240 CHECK);
2241 }
2242 }
2243 }
2244
2245 // To merge LocalVariableTable and LocalVariableTypeTable
2246 const Classfile_LVT_Element* cf_lvtt;
2247 LocalVariableTableElement lvtt_elem;
2248
2249 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2250 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2251 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2252 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2253 LocalVariableTableElement** entry = table->get(lvtt_elem);
2254 if (entry == NULL) {
2255 if (_need_verify) {
2256 classfile_parse_error("LVTT entry for '%s' in class file %s "
2257 "does not match any LVT entry",
2258 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2259 CHECK);
2260 }
2261 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2262 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2263 "entry for '%s' in class file %s",
2264 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2265 CHECK);
2266 } else {
2267 // to add generic signatures into LocalVariableTable
2268 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2269 }
2270 }
2271 }
2272 }
2273
2274
2275 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2276 const u1* runtime_visible_annotations,
2277 int runtime_visible_annotations_length,
2278 const u1* runtime_invisible_annotations,
2279 int runtime_invisible_annotations_length,
2280 const u1* runtime_visible_parameter_annotations,
2281 int runtime_visible_parameter_annotations_length,
2282 const u1* runtime_invisible_parameter_annotations,
2283 int runtime_invisible_parameter_annotations_length,
2284 const u1* runtime_visible_type_annotations,
2285 int runtime_visible_type_annotations_length,
2286 const u1* runtime_invisible_type_annotations,
2287 int runtime_invisible_type_annotations_length,
2288 const u1* annotation_default,
2289 int annotation_default_length,
2290 TRAPS) {
2291
2292 AnnotationArray* a;
2293
2294 if (runtime_visible_annotations_length +
2295 runtime_invisible_annotations_length > 0) {
2296 a = assemble_annotations(runtime_visible_annotations,
2297 runtime_visible_annotations_length,
2298 runtime_invisible_annotations,
2299 runtime_invisible_annotations_length,
2300 CHECK);
2301 cm->set_method_annotations(a);
2302 }
2303
2304 if (runtime_visible_parameter_annotations_length +
2305 runtime_invisible_parameter_annotations_length > 0) {
2306 a = assemble_annotations(runtime_visible_parameter_annotations,
2307 runtime_visible_parameter_annotations_length,
2308 runtime_invisible_parameter_annotations,
2309 runtime_invisible_parameter_annotations_length,
2310 CHECK);
2311 cm->set_parameter_annotations(a);
2312 }
2313
2314 if (annotation_default_length > 0) {
2315 a = assemble_annotations(annotation_default,
2316 annotation_default_length,
2317 NULL,
2318 0,
2319 CHECK);
2320 cm->set_default_annotations(a);
2321 }
2322
2323 if (runtime_visible_type_annotations_length +
2324 runtime_invisible_type_annotations_length > 0) {
2325 a = assemble_annotations(runtime_visible_type_annotations,
2326 runtime_visible_type_annotations_length,
2327 runtime_invisible_type_annotations,
2328 runtime_invisible_type_annotations_length,
2329 CHECK);
2330 cm->set_type_annotations(a);
2331 }
2332 }
2333
2334
2335 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2336 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2337 // Method* to save footprint, so we only know the size of the resulting Method* when the
2338 // entire method attribute is parsed.
2339 //
2340 // The promoted_flags parameter is used to pass relevant access_flags
2341 // from the method back up to the containing klass. These flag values
2342 // are added to klass's access_flags.
2343
2344 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2345 bool is_interface,
2346 const ConstantPool* cp,
2347 AccessFlags* const promoted_flags,
2348 TRAPS) {
2349 assert(cfs != NULL, "invariant");
2350 assert(cp != NULL, "invariant");
2351 assert(promoted_flags != NULL, "invariant");
2352
2353 ResourceMark rm(THREAD);
2354 // Parse fixed parts:
2355 // access_flags, name_index, descriptor_index, attributes_count
2356 cfs->guarantee_more(8, CHECK_NULL);
2357
2358 int flags = cfs->get_u2_fast();
2359 const u2 name_index = cfs->get_u2_fast();
2360 const int cp_size = cp->length();
2361 check_property(
2362 valid_symbol_at(name_index),
2363 "Illegal constant pool index %u for method name in class file %s",
2364 name_index, CHECK_NULL);
2365 const Symbol* const name = cp->symbol_at(name_index);
2366 verify_legal_method_name(name, CHECK_NULL);
2367
2368 const u2 signature_index = cfs->get_u2_fast();
2369 guarantee_property(
2370 valid_symbol_at(signature_index),
2371 "Illegal constant pool index %u for method signature in class file %s",
2372 signature_index, CHECK_NULL);
2373 const Symbol* const signature = cp->symbol_at(signature_index);
2374
2375 if (name == vmSymbols::class_initializer_name()) {
2376 // We ignore the other access flags for a valid class initializer.
2377 // (JVM Spec 2nd ed., chapter 4.6)
2378 if (_major_version < 51) { // backward compatibility
2379 flags = JVM_ACC_STATIC;
2380 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2381 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2382 } else {
2383 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2384 }
2385 } else {
2386 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2387 }
2388
2389 if (name == vmSymbols::object_initializer_name() && is_interface) {
2390 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2391 }
2392
2393 int args_size = -1; // only used when _need_verify is true
2394 if (_need_verify) {
2395 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2396 verify_legal_method_signature(name, signature, CHECK_NULL);
2397 if (args_size > MAX_ARGS_SIZE) {
2398 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2399 }
2400 }
2401
2402 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2403
2404 // Default values for code and exceptions attribute elements
2405 u2 max_stack = 0;
2406 u2 max_locals = 0;
2407 u4 code_length = 0;
2408 const u1* code_start = 0;
2409 u2 exception_table_length = 0;
2410 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2411 Array<int>* exception_handlers = Universe::the_empty_int_array();
2412 u2 checked_exceptions_length = 0;
2413 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2414 CompressedLineNumberWriteStream* linenumber_table = NULL;
2415 int linenumber_table_length = 0;
2416 int total_lvt_length = 0;
2417 u2 lvt_cnt = 0;
2418 u2 lvtt_cnt = 0;
2419 bool lvt_allocated = false;
2420 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2421 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2422 u2* localvariable_table_length = NULL;
2423 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2424 u2* localvariable_type_table_length = NULL;
2425 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2426 int method_parameters_length = -1;
2427 const u1* method_parameters_data = NULL;
2428 bool method_parameters_seen = false;
2429 bool parsed_code_attribute = false;
2430 bool parsed_checked_exceptions_attribute = false;
2431 bool parsed_stackmap_attribute = false;
2432 // stackmap attribute - JDK1.5
2433 const u1* stackmap_data = NULL;
2434 int stackmap_data_length = 0;
2435 u2 generic_signature_index = 0;
2436 MethodAnnotationCollector parsed_annotations;
2437 const u1* runtime_visible_annotations = NULL;
2438 int runtime_visible_annotations_length = 0;
2439 const u1* runtime_invisible_annotations = NULL;
2440 int runtime_invisible_annotations_length = 0;
2441 const u1* runtime_visible_parameter_annotations = NULL;
2442 int runtime_visible_parameter_annotations_length = 0;
2443 const u1* runtime_invisible_parameter_annotations = NULL;
2444 int runtime_invisible_parameter_annotations_length = 0;
2445 const u1* runtime_visible_type_annotations = NULL;
2446 int runtime_visible_type_annotations_length = 0;
2447 const u1* runtime_invisible_type_annotations = NULL;
2448 int runtime_invisible_type_annotations_length = 0;
2449 bool runtime_invisible_annotations_exists = false;
2450 bool runtime_invisible_type_annotations_exists = false;
2451 bool runtime_invisible_parameter_annotations_exists = false;
2452 const u1* annotation_default = NULL;
2453 int annotation_default_length = 0;
2454
2455 // Parse code and exceptions attribute
2456 u2 method_attributes_count = cfs->get_u2_fast();
2457 while (method_attributes_count--) {
2458 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2459 const u2 method_attribute_name_index = cfs->get_u2_fast();
2460 const u4 method_attribute_length = cfs->get_u4_fast();
2461 check_property(
2462 valid_symbol_at(method_attribute_name_index),
2463 "Invalid method attribute name index %u in class file %s",
2464 method_attribute_name_index, CHECK_NULL);
2465
2466 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2467 if (method_attribute_name == vmSymbols::tag_code()) {
2468 // Parse Code attribute
2469 if (_need_verify) {
2470 guarantee_property(
2471 !access_flags.is_native() && !access_flags.is_abstract(),
2472 "Code attribute in native or abstract methods in class file %s",
2473 CHECK_NULL);
2474 }
2475 if (parsed_code_attribute) {
2476 classfile_parse_error("Multiple Code attributes in class file %s",
2477 CHECK_NULL);
2478 }
2479 parsed_code_attribute = true;
2480
2481 // Stack size, locals size, and code size
2482 if (_major_version == 45 && _minor_version <= 2) {
2483 cfs->guarantee_more(4, CHECK_NULL);
2484 max_stack = cfs->get_u1_fast();
2485 max_locals = cfs->get_u1_fast();
2486 code_length = cfs->get_u2_fast();
2487 } else {
2488 cfs->guarantee_more(8, CHECK_NULL);
2489 max_stack = cfs->get_u2_fast();
2490 max_locals = cfs->get_u2_fast();
2491 code_length = cfs->get_u4_fast();
2492 }
2493 if (_need_verify) {
2494 guarantee_property(args_size <= max_locals,
2495 "Arguments can't fit into locals in class file %s",
2496 CHECK_NULL);
2497 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2498 "Invalid method Code length %u in class file %s",
2499 code_length, CHECK_NULL);
2500 }
2501 // Code pointer
2502 code_start = cfs->current();
2503 assert(code_start != NULL, "null code start");
2504 cfs->guarantee_more(code_length, CHECK_NULL);
2505 cfs->skip_u1_fast(code_length);
2506
2507 // Exception handler table
2508 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2509 exception_table_length = cfs->get_u2_fast();
2510 if (exception_table_length > 0) {
2511 exception_table_start = parse_exception_table(cfs,
2512 code_length,
2513 exception_table_length,
2514 CHECK_NULL);
2515 }
2516
2517 // Parse additional attributes in code attribute
2518 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2519 u2 code_attributes_count = cfs->get_u2_fast();
2520
2521 unsigned int calculated_attribute_length = 0;
2522
2523 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2524 calculated_attribute_length =
2525 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2526 } else {
2527 // max_stack, locals and length are smaller in pre-version 45.2 classes
2528 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2529 }
2530 calculated_attribute_length +=
2531 code_length +
2532 sizeof(exception_table_length) +
2533 sizeof(code_attributes_count) +
2534 exception_table_length *
2535 ( sizeof(u2) + // start_pc
2536 sizeof(u2) + // end_pc
2537 sizeof(u2) + // handler_pc
2538 sizeof(u2) ); // catch_type_index
2539
2540 while (code_attributes_count--) {
2541 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2542 const u2 code_attribute_name_index = cfs->get_u2_fast();
2543 const u4 code_attribute_length = cfs->get_u4_fast();
2544 calculated_attribute_length += code_attribute_length +
2545 sizeof(code_attribute_name_index) +
2546 sizeof(code_attribute_length);
2547 check_property(valid_symbol_at(code_attribute_name_index),
2548 "Invalid code attribute name index %u in class file %s",
2549 code_attribute_name_index,
2550 CHECK_NULL);
2551 if (LoadLineNumberTables &&
2552 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2553 // Parse and compress line number table
2554 parse_linenumber_table(code_attribute_length,
2555 code_length,
2556 &linenumber_table,
2557 CHECK_NULL);
2558
2559 } else if (LoadLocalVariableTables &&
2560 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2561 // Parse local variable table
2562 if (!lvt_allocated) {
2563 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2564 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2565 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2566 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2567 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2568 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2569 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2570 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2571 lvt_allocated = true;
2572 }
2573 if (lvt_cnt == max_lvt_cnt) {
2574 max_lvt_cnt <<= 1;
2575 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2576 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2577 }
2578 localvariable_table_start[lvt_cnt] =
2579 parse_localvariable_table(cfs,
2580 code_length,
2581 max_locals,
2582 code_attribute_length,
2583 &localvariable_table_length[lvt_cnt],
2584 false, // is not LVTT
2585 CHECK_NULL);
2586 total_lvt_length += localvariable_table_length[lvt_cnt];
2587 lvt_cnt++;
2588 } else if (LoadLocalVariableTypeTables &&
2589 _major_version >= JAVA_1_5_VERSION &&
2590 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2591 if (!lvt_allocated) {
2592 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2593 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2594 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2595 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2596 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2597 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2598 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2599 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2600 lvt_allocated = true;
2601 }
2602 // Parse local variable type table
2603 if (lvtt_cnt == max_lvtt_cnt) {
2604 max_lvtt_cnt <<= 1;
2605 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2606 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2607 }
2608 localvariable_type_table_start[lvtt_cnt] =
2609 parse_localvariable_table(cfs,
2610 code_length,
2611 max_locals,
2612 code_attribute_length,
2613 &localvariable_type_table_length[lvtt_cnt],
2614 true, // is LVTT
2615 CHECK_NULL);
2616 lvtt_cnt++;
2617 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2618 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2619 // Stack map is only needed by the new verifier in JDK1.5.
2620 if (parsed_stackmap_attribute) {
2621 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2622 }
2623 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2624 stackmap_data_length = code_attribute_length;
2625 parsed_stackmap_attribute = true;
2626 } else {
2627 // Skip unknown attributes
2628 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2629 }
2630 }
2631 // check method attribute length
2632 if (_need_verify) {
2633 guarantee_property(method_attribute_length == calculated_attribute_length,
2634 "Code segment has wrong length in class file %s",
2635 CHECK_NULL);
2636 }
2637 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2638 // Parse Exceptions attribute
2639 if (parsed_checked_exceptions_attribute) {
2640 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2641 CHECK_NULL);
2642 }
2643 parsed_checked_exceptions_attribute = true;
2644 checked_exceptions_start =
2645 parse_checked_exceptions(cfs,
2646 &checked_exceptions_length,
2647 method_attribute_length,
2648 CHECK_NULL);
2649 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2650 // reject multiple method parameters
2651 if (method_parameters_seen) {
2652 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2653 CHECK_NULL);
2654 }
2655 method_parameters_seen = true;
2656 method_parameters_length = cfs->get_u1_fast();
2657 const u2 real_length = (method_parameters_length * 4u) + 1u;
2658 if (method_attribute_length != real_length) {
2659 classfile_parse_error(
2660 "Invalid MethodParameters method attribute length %u in class file",
2661 method_attribute_length, CHECK_NULL);
2662 }
2663 method_parameters_data = cfs->current();
2664 cfs->skip_u2_fast(method_parameters_length);
2665 cfs->skip_u2_fast(method_parameters_length);
2666 // ignore this attribute if it cannot be reflected
2667 if (!SystemDictionary::Parameter_klass_loaded())
2668 method_parameters_length = -1;
2669 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2670 if (method_attribute_length != 0) {
2671 classfile_parse_error(
2672 "Invalid Synthetic method attribute length %u in class file %s",
2673 method_attribute_length, CHECK_NULL);
2674 }
2675 // Should we check that there hasn't already been a synthetic attribute?
2676 access_flags.set_is_synthetic();
2677 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2678 if (method_attribute_length != 0) {
2679 classfile_parse_error(
2680 "Invalid Deprecated method attribute length %u in class file %s",
2681 method_attribute_length, CHECK_NULL);
2682 }
2683 } else if (_major_version >= JAVA_1_5_VERSION) {
2684 if (method_attribute_name == vmSymbols::tag_signature()) {
2685 if (generic_signature_index != 0) {
2686 classfile_parse_error(
2687 "Multiple Signature attributes for method in class file %s",
2688 CHECK_NULL);
2689 }
2690 if (method_attribute_length != 2) {
2691 classfile_parse_error(
2692 "Invalid Signature attribute length %u in class file %s",
2693 method_attribute_length, CHECK_NULL);
2694 }
2695 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2696 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2697 if (runtime_visible_annotations != NULL) {
2698 classfile_parse_error(
2699 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2700 CHECK_NULL);
2701 }
2702 runtime_visible_annotations_length = method_attribute_length;
2703 runtime_visible_annotations = cfs->current();
2704 assert(runtime_visible_annotations != NULL, "null visible annotations");
2705 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2706 parse_annotations(cp,
2707 runtime_visible_annotations,
2708 runtime_visible_annotations_length,
2709 &parsed_annotations,
2710 _loader_data,
2711 CHECK_NULL);
2712 cfs->skip_u1_fast(runtime_visible_annotations_length);
2713 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2714 if (runtime_invisible_annotations_exists) {
2715 classfile_parse_error(
2716 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2717 CHECK_NULL);
2718 }
2719 runtime_invisible_annotations_exists = true;
2720 if (PreserveAllAnnotations) {
2721 runtime_invisible_annotations_length = method_attribute_length;
2722 runtime_invisible_annotations = cfs->current();
2723 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2724 }
2725 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2726 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2727 if (runtime_visible_parameter_annotations != NULL) {
2728 classfile_parse_error(
2729 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2730 CHECK_NULL);
2731 }
2732 runtime_visible_parameter_annotations_length = method_attribute_length;
2733 runtime_visible_parameter_annotations = cfs->current();
2734 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2735 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2736 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2737 if (runtime_invisible_parameter_annotations_exists) {
2738 classfile_parse_error(
2739 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2740 CHECK_NULL);
2741 }
2742 runtime_invisible_parameter_annotations_exists = true;
2743 if (PreserveAllAnnotations) {
2744 runtime_invisible_parameter_annotations_length = method_attribute_length;
2745 runtime_invisible_parameter_annotations = cfs->current();
2746 assert(runtime_invisible_parameter_annotations != NULL,
2747 "null invisible parameter annotations");
2748 }
2749 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2750 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2751 if (annotation_default != NULL) {
2752 classfile_parse_error(
2753 "Multiple AnnotationDefault attributes for method in class file %s",
2754 CHECK_NULL);
2755 }
2756 annotation_default_length = method_attribute_length;
2757 annotation_default = cfs->current();
2758 assert(annotation_default != NULL, "null annotation default");
2759 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2760 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2761 if (runtime_visible_type_annotations != NULL) {
2762 classfile_parse_error(
2763 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2764 CHECK_NULL);
2765 }
2766 runtime_visible_type_annotations_length = method_attribute_length;
2767 runtime_visible_type_annotations = cfs->current();
2768 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2769 // No need for the VM to parse Type annotations
2770 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2771 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2772 if (runtime_invisible_type_annotations_exists) {
2773 classfile_parse_error(
2774 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2775 CHECK_NULL);
2776 } else {
2777 runtime_invisible_type_annotations_exists = true;
2778 }
2779 if (PreserveAllAnnotations) {
2780 runtime_invisible_type_annotations_length = method_attribute_length;
2781 runtime_invisible_type_annotations = cfs->current();
2782 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2783 }
2784 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2785 } else {
2786 // Skip unknown attributes
2787 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2788 }
2789 } else {
2790 // Skip unknown attributes
2791 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2792 }
2793 }
2794
2795 if (linenumber_table != NULL) {
2796 linenumber_table->write_terminator();
2797 linenumber_table_length = linenumber_table->position();
2798 }
2799
2800 // Make sure there's at least one Code attribute in non-native/non-abstract method
2801 if (_need_verify) {
2802 guarantee_property(access_flags.is_native() ||
2803 access_flags.is_abstract() ||
2804 parsed_code_attribute,
2805 "Absent Code attribute in method that is not native or abstract in class file %s",
2806 CHECK_NULL);
2807 }
2808
2809 // All sizing information for a Method* is finally available, now create it
2810 InlineTableSizes sizes(
2811 total_lvt_length,
2812 linenumber_table_length,
2813 exception_table_length,
2814 checked_exceptions_length,
2815 method_parameters_length,
2816 generic_signature_index,
2817 runtime_visible_annotations_length +
2818 runtime_invisible_annotations_length,
2819 runtime_visible_parameter_annotations_length +
2820 runtime_invisible_parameter_annotations_length,
2821 runtime_visible_type_annotations_length +
2822 runtime_invisible_type_annotations_length,
2823 annotation_default_length,
2824 0);
2825
2826 Method* const m = Method::allocate(_loader_data,
2827 code_length,
2828 access_flags,
2829 &sizes,
2830 ConstMethod::NORMAL,
2831 CHECK_NULL);
2832
2833 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2834
2835 // Fill in information from fixed part (access_flags already set)
2836 m->set_constants(_cp);
2837 m->set_name_index(name_index);
2838 m->set_signature_index(signature_index);
2839
2840 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2841 m->constMethod()->set_result_type(rtf.type());
2842
2843 if (args_size >= 0) {
2844 m->set_size_of_parameters(args_size);
2845 } else {
2846 m->compute_size_of_parameters(THREAD);
2847 }
2848 #ifdef ASSERT
2849 if (args_size >= 0) {
2850 m->compute_size_of_parameters(THREAD);
2851 assert(args_size == m->size_of_parameters(), "");
2852 }
2853 #endif
2854
2855 // Fill in code attribute information
2856 m->set_max_stack(max_stack);
2857 m->set_max_locals(max_locals);
2858 if (stackmap_data != NULL) {
2859 m->constMethod()->copy_stackmap_data(_loader_data,
2860 (u1*)stackmap_data,
2861 stackmap_data_length,
2862 CHECK_NULL);
2863 }
2864
2865 // Copy byte codes
2866 m->set_code((u1*)code_start);
2867
2868 // Copy line number table
2869 if (linenumber_table != NULL) {
2870 memcpy(m->compressed_linenumber_table(),
2871 linenumber_table->buffer(),
2872 linenumber_table_length);
2873 }
2874
2875 // Copy exception table
2876 if (exception_table_length > 0) {
2877 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2878 m->exception_table_start(),
2879 exception_table_length * sizeof(ExceptionTableElement),
2880 sizeof(u2));
2881 }
2882
2883 // Copy method parameters
2884 if (method_parameters_length > 0) {
2885 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2886 for (int i = 0; i < method_parameters_length; i++) {
2887 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2888 method_parameters_data += 2;
2889 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2890 method_parameters_data += 2;
2891 }
2892 }
2893
2894 // Copy checked exceptions
2895 if (checked_exceptions_length > 0) {
2896 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2897 m->checked_exceptions_start(),
2898 checked_exceptions_length * sizeof(CheckedExceptionElement),
2899 sizeof(u2));
2900 }
2901
2902 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2903 if (total_lvt_length > 0) {
2904 promoted_flags->set_has_localvariable_table();
2905 copy_localvariable_table(m->constMethod(),
2906 lvt_cnt,
2907 localvariable_table_length,
2908 localvariable_table_start,
2909 lvtt_cnt,
2910 localvariable_type_table_length,
2911 localvariable_type_table_start,
2912 CHECK_NULL);
2913 }
2914
2915 if (parsed_annotations.has_any_annotations())
2916 parsed_annotations.apply_to(m);
2917
2918 // Copy annotations
2919 copy_method_annotations(m->constMethod(),
2920 runtime_visible_annotations,
2921 runtime_visible_annotations_length,
2922 runtime_invisible_annotations,
2923 runtime_invisible_annotations_length,
2924 runtime_visible_parameter_annotations,
2925 runtime_visible_parameter_annotations_length,
2926 runtime_invisible_parameter_annotations,
2927 runtime_invisible_parameter_annotations_length,
2928 runtime_visible_type_annotations,
2929 runtime_visible_type_annotations_length,
2930 runtime_invisible_type_annotations,
2931 runtime_invisible_type_annotations_length,
2932 annotation_default,
2933 annotation_default_length,
2934 CHECK_NULL);
2935
2936 if (name == vmSymbols::finalize_method_name() &&
2937 signature == vmSymbols::void_method_signature()) {
2938 if (m->is_empty_method()) {
2939 _has_empty_finalizer = true;
2940 } else {
2941 _has_finalizer = true;
2942 }
2943 }
2944 if (name == vmSymbols::object_initializer_name() &&
2945 signature == vmSymbols::void_method_signature() &&
2946 m->is_vanilla_constructor()) {
2947 _has_vanilla_constructor = true;
2948 }
2949
2950 NOT_PRODUCT(m->verify());
2951 return m;
2952 }
2953
2954
2955 // The promoted_flags parameter is used to pass relevant access_flags
2956 // from the methods back up to the containing klass. These flag values
2957 // are added to klass's access_flags.
2958 // Side-effects: populates the _methods field in the parser
2959 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2960 bool is_interface,
2961 AccessFlags* promoted_flags,
2962 bool* has_final_method,
2963 bool* declares_nonstatic_concrete_methods,
2964 TRAPS) {
2965 assert(cfs != NULL, "invariant");
2966 assert(promoted_flags != NULL, "invariant");
2967 assert(has_final_method != NULL, "invariant");
2968 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2969
2970 assert(NULL == _methods, "invariant");
2971
2972 cfs->guarantee_more(2, CHECK); // length
2973 const u2 length = cfs->get_u2_fast();
2974 if (length == 0) {
2975 _methods = Universe::the_empty_method_array();
2976 } else {
2977 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2978 length,
2979 NULL,
2980 CHECK);
2981
2982 for (int index = 0; index < length; index++) {
2983 Method* method = parse_method(cfs,
2984 is_interface,
2985 _cp,
2986 promoted_flags,
2987 CHECK);
2988
2989 if (method->is_final()) {
2990 *has_final_method = true;
2991 }
2992 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2993 // used for interface initialization, and default method inheritance analysis
2994 if (is_interface && !(*declares_nonstatic_concrete_methods)
2995 && !method->is_abstract() && !method->is_static()) {
2996 *declares_nonstatic_concrete_methods = true;
2997 }
2998 _methods->at_put(index, method);
2999 }
3000
3001 if (_need_verify && length > 1) {
3002 // Check duplicated methods
3003 ResourceMark rm(THREAD);
3004 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
3005 THREAD, NameSigHash*, HASH_ROW_SIZE);
3006 initialize_hashtable(names_and_sigs);
3007 bool dup = false;
3008 const Symbol* name = NULL;
3009 const Symbol* sig = NULL;
3010 {
3011 debug_only(NoSafepointVerifier nsv;)
3012 for (int i = 0; i < length; i++) {
3013 const Method* const m = _methods->at(i);
3014 name = m->name();
3015 sig = m->signature();
3016 // If no duplicates, add name/signature in hashtable names_and_sigs.
3017 if (!put_after_lookup(name, sig, names_and_sigs)) {
3018 dup = true;
3019 break;
3020 }
3021 }
3022 }
3023 if (dup) {
3024 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
3025 name->as_C_string(), sig->as_klass_external_name(), CHECK);
3026 }
3027 }
3028 }
3029 }
3030
3031 static const intArray* sort_methods(Array<Method*>* methods) {
3032 const int length = methods->length();
3033 // If JVMTI original method ordering or sharing is enabled we have to
3034 // remember the original class file ordering.
3035 // We temporarily use the vtable_index field in the Method* to store the
3036 // class file index, so we can read in after calling qsort.
3037 // Put the method ordering in the shared archive.
3038 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3039 for (int index = 0; index < length; index++) {
3040 Method* const m = methods->at(index);
3041 assert(!m->valid_vtable_index(), "vtable index should not be set");
3042 m->set_vtable_index(index);
3043 }
3044 }
3045 // Sort method array by ascending method name (for faster lookups & vtable construction)
3046 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3047 Method::sort_methods(methods);
3048
3049 intArray* method_ordering = NULL;
3050 // If JVMTI original method ordering or sharing is enabled construct int
3051 // array remembering the original ordering
3052 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3053 method_ordering = new intArray(length, length, -1);
3054 for (int index = 0; index < length; index++) {
3055 Method* const m = methods->at(index);
3056 const int old_index = m->vtable_index();
3057 assert(old_index >= 0 && old_index < length, "invalid method index");
3058 method_ordering->at_put(index, old_index);
3059 m->set_vtable_index(Method::invalid_vtable_index);
3060 }
3061 }
3062 return method_ordering;
3063 }
3064
3065 // Parse generic_signature attribute for methods and fields
3066 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3067 TRAPS) {
3068 assert(cfs != NULL, "invariant");
3069
3070 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3071 const u2 generic_signature_index = cfs->get_u2_fast();
3072 check_property(
3073 valid_symbol_at(generic_signature_index),
3074 "Invalid Signature attribute at constant pool index %u in class file %s",
3075 generic_signature_index, CHECK_0);
3076 return generic_signature_index;
3077 }
3078
3079 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3080 TRAPS) {
3081
3082 assert(cfs != NULL, "invariant");
3083
3084 cfs->guarantee_more(2, CHECK); // sourcefile_index
3085 const u2 sourcefile_index = cfs->get_u2_fast();
3086 check_property(
3087 valid_symbol_at(sourcefile_index),
3088 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3089 sourcefile_index, CHECK);
3090 set_class_sourcefile_index(sourcefile_index);
3091 }
3092
3093 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3094 int length,
3095 TRAPS) {
3096 assert(cfs != NULL, "invariant");
3097
3098 const u1* const sde_buffer = cfs->current();
3099 assert(sde_buffer != NULL, "null sde buffer");
3100
3101 // Don't bother storing it if there is no way to retrieve it
3102 if (JvmtiExport::can_get_source_debug_extension()) {
3103 assert((length+1) > length, "Overflow checking");
3104 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3105 for (int i = 0; i < length; i++) {
3106 sde[i] = sde_buffer[i];
3107 }
3108 sde[length] = '\0';
3109 set_class_sde_buffer((const char*)sde, length);
3110 }
3111 // Got utf8 string, set stream position forward
3112 cfs->skip_u1(length, CHECK);
3113 }
3114
3115
3116 // Inner classes can be static, private or protected (classic VM does this)
3117 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3118 JVM_ACC_PRIVATE | \
3119 JVM_ACC_PROTECTED | \
3120 JVM_ACC_STATIC \
3121 )
3122
3123 // Return number of classes in the inner classes attribute table
3124 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3125 const u1* const inner_classes_attribute_start,
3126 bool parsed_enclosingmethod_attribute,
3127 u2 enclosing_method_class_index,
3128 u2 enclosing_method_method_index,
3129 TRAPS) {
3130 const u1* const current_mark = cfs->current();
3131 u2 length = 0;
3132 if (inner_classes_attribute_start != NULL) {
3133 cfs->set_current(inner_classes_attribute_start);
3134 cfs->guarantee_more(2, CHECK_0); // length
3135 length = cfs->get_u2_fast();
3136 }
3137
3138 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3139 // method data:
3140 // [inner_class_info_index,
3141 // outer_class_info_index,
3142 // inner_name_index,
3143 // inner_class_access_flags,
3144 // ...
3145 // enclosing_method_class_index,
3146 // enclosing_method_method_index]
3147 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3148 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3149 _inner_classes = inner_classes;
3150
3151 int index = 0;
3152 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3153 for (int n = 0; n < length; n++) {
3154 // Inner class index
3155 const u2 inner_class_info_index = cfs->get_u2_fast();
3156 check_property(
3157 valid_klass_reference_at(inner_class_info_index),
3158 "inner_class_info_index %u has bad constant type in class file %s",
3159 inner_class_info_index, CHECK_0);
3160 // Outer class index
3161 const u2 outer_class_info_index = cfs->get_u2_fast();
3162 check_property(
3163 outer_class_info_index == 0 ||
3164 valid_klass_reference_at(outer_class_info_index),
3165 "outer_class_info_index %u has bad constant type in class file %s",
3166 outer_class_info_index, CHECK_0);
3167 // Inner class name
3168 const u2 inner_name_index = cfs->get_u2_fast();
3169 check_property(
3170 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3171 "inner_name_index %u has bad constant type in class file %s",
3172 inner_name_index, CHECK_0);
3173 if (_need_verify) {
3174 guarantee_property(inner_class_info_index != outer_class_info_index,
3175 "Class is both outer and inner class in class file %s", CHECK_0);
3176 }
3177 // Access flags
3178 jint flags;
3179 // JVM_ACC_MODULE is defined in JDK-9 and later.
3180 if (_major_version >= JAVA_9_VERSION) {
3181 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3182 } else {
3183 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3184 }
3185 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3186 // Set abstract bit for old class files for backward compatibility
3187 flags |= JVM_ACC_ABSTRACT;
3188 }
3189 verify_legal_class_modifiers(flags, CHECK_0);
3190 AccessFlags inner_access_flags(flags);
3191
3192 inner_classes->at_put(index++, inner_class_info_index);
3193 inner_classes->at_put(index++, outer_class_info_index);
3194 inner_classes->at_put(index++, inner_name_index);
3195 inner_classes->at_put(index++, inner_access_flags.as_short());
3196 }
3197
3198 // 4347400: make sure there's no duplicate entry in the classes array
3199 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3200 for(int i = 0; i < length * 4; i += 4) {
3201 for(int j = i + 4; j < length * 4; j += 4) {
3202 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3203 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3204 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3205 inner_classes->at(i+3) != inner_classes->at(j+3)),
3206 "Duplicate entry in InnerClasses in class file %s",
3207 CHECK_0);
3208 }
3209 }
3210 }
3211
3212 // Set EnclosingMethod class and method indexes.
3213 if (parsed_enclosingmethod_attribute) {
3214 inner_classes->at_put(index++, enclosing_method_class_index);
3215 inner_classes->at_put(index++, enclosing_method_method_index);
3216 }
3217 assert(index == size, "wrong size");
3218
3219 // Restore buffer's current position.
3220 cfs->set_current(current_mark);
3221
3222 return length;
3223 }
3224
3225 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3226 const u1* const nest_members_attribute_start,
3227 TRAPS) {
3228 const u1* const current_mark = cfs->current();
3229 u2 length = 0;
3230 if (nest_members_attribute_start != NULL) {
3231 cfs->set_current(nest_members_attribute_start);
3232 cfs->guarantee_more(2, CHECK_0); // length
3233 length = cfs->get_u2_fast();
3234 }
3235 const int size = length;
3236 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3237 _nest_members = nest_members;
3238
3239 int index = 0;
3240 cfs->guarantee_more(2 * length, CHECK_0);
3241 for (int n = 0; n < length; n++) {
3242 const u2 class_info_index = cfs->get_u2_fast();
3243 check_property(
3244 valid_klass_reference_at(class_info_index),
3245 "Nest member class_info_index %u has bad constant type in class file %s",
3246 class_info_index, CHECK_0);
3247 nest_members->at_put(index++, class_info_index);
3248 }
3249 assert(index == size, "wrong size");
3250
3251 // Restore buffer's current position.
3252 cfs->set_current(current_mark);
3253
3254 return length;
3255 }
3256
3257 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3258 set_class_synthetic_flag(true);
3259 }
3260
3261 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3262 assert(cfs != NULL, "invariant");
3263
3264 const u2 signature_index = cfs->get_u2(CHECK);
3265 check_property(
3266 valid_symbol_at(signature_index),
3267 "Invalid constant pool index %u in Signature attribute in class file %s",
3268 signature_index, CHECK);
3269 set_class_generic_signature_index(signature_index);
3270 }
3271
3272 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3273 ConstantPool* cp,
3274 u4 attribute_byte_length,
3275 TRAPS) {
3276 assert(cfs != NULL, "invariant");
3277 assert(cp != NULL, "invariant");
3278
3279 const u1* const current_start = cfs->current();
3280
3281 guarantee_property(attribute_byte_length >= sizeof(u2),
3282 "Invalid BootstrapMethods attribute length %u in class file %s",
3283 attribute_byte_length,
3284 CHECK);
3285
3286 cfs->guarantee_more(attribute_byte_length, CHECK);
3287
3288 const int attribute_array_length = cfs->get_u2_fast();
3289
3290 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3291 "Short length on BootstrapMethods in class file %s",
3292 CHECK);
3293
3294
3295 // The attribute contains a counted array of counted tuples of shorts,
3296 // represending bootstrap specifiers:
3297 // length*{bootstrap_method_index, argument_count*{argument_index}}
3298 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3299 // operand_count = number of shorts in attr, except for leading length
3300
3301 // The attribute is copied into a short[] array.
3302 // The array begins with a series of short[2] pairs, one for each tuple.
3303 const int index_size = (attribute_array_length * 2);
3304
3305 Array<u2>* const operands =
3306 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3307
3308 // Eagerly assign operands so they will be deallocated with the constant
3309 // pool if there is an error.
3310 cp->set_operands(operands);
3311
3312 int operand_fill_index = index_size;
3313 const int cp_size = cp->length();
3314
3315 for (int n = 0; n < attribute_array_length; n++) {
3316 // Store a 32-bit offset into the header of the operand array.
3317 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3318
3319 // Read a bootstrap specifier.
3320 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3321 const u2 bootstrap_method_index = cfs->get_u2_fast();
3322 const u2 argument_count = cfs->get_u2_fast();
3323 check_property(
3324 valid_cp_range(bootstrap_method_index, cp_size) &&
3325 cp->tag_at(bootstrap_method_index).is_method_handle(),
3326 "bootstrap_method_index %u has bad constant type in class file %s",
3327 bootstrap_method_index,
3328 CHECK);
3329
3330 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3331 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3332 CHECK);
3333
3334 operands->at_put(operand_fill_index++, bootstrap_method_index);
3335 operands->at_put(operand_fill_index++, argument_count);
3336
3337 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3338 for (int j = 0; j < argument_count; j++) {
3339 const u2 argument_index = cfs->get_u2_fast();
3340 check_property(
3341 valid_cp_range(argument_index, cp_size) &&
3342 cp->tag_at(argument_index).is_loadable_constant(),
3343 "argument_index %u has bad constant type in class file %s",
3344 argument_index,
3345 CHECK);
3346 operands->at_put(operand_fill_index++, argument_index);
3347 }
3348 }
3349 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3350 "Bad length on BootstrapMethods in class file %s",
3351 CHECK);
3352 }
3353
3354 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3355 ConstantPool* cp,
3356 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3357 TRAPS) {
3358 assert(cfs != NULL, "invariant");
3359 assert(cp != NULL, "invariant");
3360 assert(parsed_annotations != NULL, "invariant");
3361
3362 // Set inner classes attribute to default sentinel
3363 _inner_classes = Universe::the_empty_short_array();
3364 // Set nest members attribute to default sentinel
3365 _nest_members = Universe::the_empty_short_array();
3366 cfs->guarantee_more(2, CHECK); // attributes_count
3367 u2 attributes_count = cfs->get_u2_fast();
3368 bool parsed_sourcefile_attribute = false;
3369 bool parsed_innerclasses_attribute = false;
3370 bool parsed_nest_members_attribute = false;
3371 bool parsed_nest_host_attribute = false;
3372 bool parsed_enclosingmethod_attribute = false;
3373 bool parsed_bootstrap_methods_attribute = false;
3374 const u1* runtime_visible_annotations = NULL;
3375 int runtime_visible_annotations_length = 0;
3376 const u1* runtime_invisible_annotations = NULL;
3377 int runtime_invisible_annotations_length = 0;
3378 const u1* runtime_visible_type_annotations = NULL;
3379 int runtime_visible_type_annotations_length = 0;
3380 const u1* runtime_invisible_type_annotations = NULL;
3381 int runtime_invisible_type_annotations_length = 0;
3382 bool runtime_invisible_type_annotations_exists = false;
3383 bool runtime_invisible_annotations_exists = false;
3384 bool parsed_source_debug_ext_annotations_exist = false;
3385 const u1* inner_classes_attribute_start = NULL;
3386 u4 inner_classes_attribute_length = 0;
3387 u2 enclosing_method_class_index = 0;
3388 u2 enclosing_method_method_index = 0;
3389 const u1* nest_members_attribute_start = NULL;
3390 u4 nest_members_attribute_length = 0;
3391
3392 // Iterate over attributes
3393 while (attributes_count--) {
3394 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3395 const u2 attribute_name_index = cfs->get_u2_fast();
3396 const u4 attribute_length = cfs->get_u4_fast();
3397 check_property(
3398 valid_symbol_at(attribute_name_index),
3399 "Attribute name has bad constant pool index %u in class file %s",
3400 attribute_name_index, CHECK);
3401 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3402 if (tag == vmSymbols::tag_source_file()) {
3403 // Check for SourceFile tag
3404 if (_need_verify) {
3405 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3406 }
3407 if (parsed_sourcefile_attribute) {
3408 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3409 } else {
3410 parsed_sourcefile_attribute = true;
3411 }
3412 parse_classfile_sourcefile_attribute(cfs, CHECK);
3413 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3414 // Check for SourceDebugExtension tag
3415 if (parsed_source_debug_ext_annotations_exist) {
3416 classfile_parse_error(
3417 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3418 }
3419 parsed_source_debug_ext_annotations_exist = true;
3420 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3421 } else if (tag == vmSymbols::tag_inner_classes()) {
3422 // Check for InnerClasses tag
3423 if (parsed_innerclasses_attribute) {
3424 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3425 } else {
3426 parsed_innerclasses_attribute = true;
3427 }
3428 inner_classes_attribute_start = cfs->current();
3429 inner_classes_attribute_length = attribute_length;
3430 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3431 } else if (tag == vmSymbols::tag_synthetic()) {
3432 // Check for Synthetic tag
3433 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3434 if (attribute_length != 0) {
3435 classfile_parse_error(
3436 "Invalid Synthetic classfile attribute length %u in class file %s",
3437 attribute_length, CHECK);
3438 }
3439 parse_classfile_synthetic_attribute(CHECK);
3440 } else if (tag == vmSymbols::tag_deprecated()) {
3441 // Check for Deprecatd tag - 4276120
3442 if (attribute_length != 0) {
3443 classfile_parse_error(
3444 "Invalid Deprecated classfile attribute length %u in class file %s",
3445 attribute_length, CHECK);
3446 }
3447 } else if (_major_version >= JAVA_1_5_VERSION) {
3448 if (tag == vmSymbols::tag_signature()) {
3449 if (_generic_signature_index != 0) {
3450 classfile_parse_error(
3451 "Multiple Signature attributes in class file %s", CHECK);
3452 }
3453 if (attribute_length != 2) {
3454 classfile_parse_error(
3455 "Wrong Signature attribute length %u in class file %s",
3456 attribute_length, CHECK);
3457 }
3458 parse_classfile_signature_attribute(cfs, CHECK);
3459 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3460 if (runtime_visible_annotations != NULL) {
3461 classfile_parse_error(
3462 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3463 }
3464 runtime_visible_annotations_length = attribute_length;
3465 runtime_visible_annotations = cfs->current();
3466 assert(runtime_visible_annotations != NULL, "null visible annotations");
3467 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3468 parse_annotations(cp,
3469 runtime_visible_annotations,
3470 runtime_visible_annotations_length,
3471 parsed_annotations,
3472 _loader_data,
3473 CHECK);
3474 cfs->skip_u1_fast(runtime_visible_annotations_length);
3475 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3476 if (runtime_invisible_annotations_exists) {
3477 classfile_parse_error(
3478 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3479 }
3480 runtime_invisible_annotations_exists = true;
3481 if (PreserveAllAnnotations) {
3482 runtime_invisible_annotations_length = attribute_length;
3483 runtime_invisible_annotations = cfs->current();
3484 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3485 }
3486 cfs->skip_u1(attribute_length, CHECK);
3487 } else if (tag == vmSymbols::tag_enclosing_method()) {
3488 if (parsed_enclosingmethod_attribute) {
3489 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3490 } else {
3491 parsed_enclosingmethod_attribute = true;
3492 }
3493 guarantee_property(attribute_length == 4,
3494 "Wrong EnclosingMethod attribute length %u in class file %s",
3495 attribute_length, CHECK);
3496 cfs->guarantee_more(4, CHECK); // class_index, method_index
3497 enclosing_method_class_index = cfs->get_u2_fast();
3498 enclosing_method_method_index = cfs->get_u2_fast();
3499 if (enclosing_method_class_index == 0) {
3500 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3501 }
3502 // Validate the constant pool indices and types
3503 check_property(valid_klass_reference_at(enclosing_method_class_index),
3504 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3505 if (enclosing_method_method_index != 0 &&
3506 (!cp->is_within_bounds(enclosing_method_method_index) ||
3507 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3508 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3509 }
3510 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3511 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3512 if (parsed_bootstrap_methods_attribute) {
3513 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3514 }
3515 parsed_bootstrap_methods_attribute = true;
3516 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3517 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3518 if (runtime_visible_type_annotations != NULL) {
3519 classfile_parse_error(
3520 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3521 }
3522 runtime_visible_type_annotations_length = attribute_length;
3523 runtime_visible_type_annotations = cfs->current();
3524 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3525 // No need for the VM to parse Type annotations
3526 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3527 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3528 if (runtime_invisible_type_annotations_exists) {
3529 classfile_parse_error(
3530 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3531 } else {
3532 runtime_invisible_type_annotations_exists = true;
3533 }
3534 if (PreserveAllAnnotations) {
3535 runtime_invisible_type_annotations_length = attribute_length;
3536 runtime_invisible_type_annotations = cfs->current();
3537 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3538 }
3539 cfs->skip_u1(attribute_length, CHECK);
3540 } else if (_major_version >= JAVA_11_VERSION) {
3541 if (tag == vmSymbols::tag_nest_members()) {
3542 // Check for NestMembers tag
3543 if (parsed_nest_members_attribute) {
3544 classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3545 } else {
3546 parsed_nest_members_attribute = true;
3547 }
3548 if (parsed_nest_host_attribute) {
3549 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3550 }
3551 nest_members_attribute_start = cfs->current();
3552 nest_members_attribute_length = attribute_length;
3553 cfs->skip_u1(nest_members_attribute_length, CHECK);
3554 } else if (tag == vmSymbols::tag_nest_host()) {
3555 if (parsed_nest_host_attribute) {
3556 classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3557 } else {
3558 parsed_nest_host_attribute = true;
3559 }
3560 if (parsed_nest_members_attribute) {
3561 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3562 }
3563 if (_need_verify) {
3564 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3565 }
3566 cfs->guarantee_more(2, CHECK);
3567 u2 class_info_index = cfs->get_u2_fast();
3568 check_property(
3569 valid_klass_reference_at(class_info_index),
3570 "Nest-host class_info_index %u has bad constant type in class file %s",
3571 class_info_index, CHECK);
3572 _nest_host = class_info_index;
3573 }
3574 } else {
3575 // Unknown attribute
3576 cfs->skip_u1(attribute_length, CHECK);
3577 }
3578 } else {
3579 // Unknown attribute
3580 cfs->skip_u1(attribute_length, CHECK);
3581 }
3582 }
3583 _annotations = assemble_annotations(runtime_visible_annotations,
3584 runtime_visible_annotations_length,
3585 runtime_invisible_annotations,
3586 runtime_invisible_annotations_length,
3587 CHECK);
3588 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3589 runtime_visible_type_annotations_length,
3590 runtime_invisible_type_annotations,
3591 runtime_invisible_type_annotations_length,
3592 CHECK);
3593
3594 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3595 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3596 cfs,
3597 inner_classes_attribute_start,
3598 parsed_innerclasses_attribute,
3599 enclosing_method_class_index,
3600 enclosing_method_method_index,
3601 CHECK);
3602 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3603 guarantee_property(
3604 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3605 "Wrong InnerClasses attribute length in class file %s", CHECK);
3606 }
3607 }
3608
3609 if (parsed_nest_members_attribute) {
3610 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3611 cfs,
3612 nest_members_attribute_start,
3613 CHECK);
3614 if (_need_verify) {
3615 guarantee_property(
3616 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3617 "Wrong NestMembers attribute length in class file %s", CHECK);
3618 }
3619 }
3620
3621 if (_max_bootstrap_specifier_index >= 0) {
3622 guarantee_property(parsed_bootstrap_methods_attribute,
3623 "Missing BootstrapMethods attribute in class file %s", CHECK);
3624 }
3625 }
3626
3627 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3628 assert(k != NULL, "invariant");
3629
3630 if (_synthetic_flag)
3631 k->set_is_synthetic();
3632 if (_sourcefile_index != 0) {
3633 k->set_source_file_name_index(_sourcefile_index);
3634 }
3635 if (_generic_signature_index != 0) {
3636 k->set_generic_signature_index(_generic_signature_index);
3637 }
3638 if (_sde_buffer != NULL) {
3639 k->set_source_debug_extension(_sde_buffer, _sde_length);
3640 }
3641 }
3642
3643 // Create the Annotations object that will
3644 // hold the annotations array for the Klass.
3645 void ClassFileParser::create_combined_annotations(TRAPS) {
3646 if (_annotations == NULL &&
3647 _type_annotations == NULL &&
3648 _fields_annotations == NULL &&
3649 _fields_type_annotations == NULL) {
3650 // Don't create the Annotations object unnecessarily.
3651 return;
3652 }
3653
3654 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3655 annotations->set_class_annotations(_annotations);
3656 annotations->set_class_type_annotations(_type_annotations);
3657 annotations->set_fields_annotations(_fields_annotations);
3658 annotations->set_fields_type_annotations(_fields_type_annotations);
3659
3660 // This is the Annotations object that will be
3661 // assigned to InstanceKlass being constructed.
3662 _combined_annotations = annotations;
3663
3664 // The annotations arrays below has been transfered the
3665 // _combined_annotations so these fields can now be cleared.
3666 _annotations = NULL;
3667 _type_annotations = NULL;
3668 _fields_annotations = NULL;
3669 _fields_type_annotations = NULL;
3670 }
3671
3672 // Transfer ownership of metadata allocated to the InstanceKlass.
3673 void ClassFileParser::apply_parsed_class_metadata(
3674 InstanceKlass* this_klass,
3675 int java_fields_count, TRAPS) {
3676 assert(this_klass != NULL, "invariant");
3677
3678 _cp->set_pool_holder(this_klass);
3679 this_klass->set_constants(_cp);
3680 this_klass->set_fields(_fields, java_fields_count);
3681 this_klass->set_methods(_methods);
3682 this_klass->set_inner_classes(_inner_classes);
3683 this_klass->set_nest_members(_nest_members);
3684 this_klass->set_nest_host_index(_nest_host);
3685 this_klass->set_local_interfaces(_local_interfaces);
3686 this_klass->set_annotations(_combined_annotations);
3687 // Delay the setting of _transitive_interfaces until after initialize_supers() in
3688 // fill_instance_klass(). It is because the _transitive_interfaces may be shared with
3689 // its _super. If an OOM occurs while loading the current klass, its _super field
3690 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3691 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3692 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3693
3694 // Clear out these fields so they don't get deallocated by the destructor
3695 clear_class_metadata();
3696 }
3697
3698 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3699 int runtime_visible_annotations_length,
3700 const u1* const runtime_invisible_annotations,
3701 int runtime_invisible_annotations_length,
3702 TRAPS) {
3703 AnnotationArray* annotations = NULL;
3704 if (runtime_visible_annotations != NULL ||
3705 runtime_invisible_annotations != NULL) {
3706 annotations = MetadataFactory::new_array<u1>(_loader_data,
3707 runtime_visible_annotations_length +
3708 runtime_invisible_annotations_length,
3709 CHECK_(annotations));
3710 if (runtime_visible_annotations != NULL) {
3711 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3712 annotations->at_put(i, runtime_visible_annotations[i]);
3713 }
3714 }
3715 if (runtime_invisible_annotations != NULL) {
3716 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3717 int append = runtime_visible_annotations_length+i;
3718 annotations->at_put(append, runtime_invisible_annotations[i]);
3719 }
3720 }
3721 }
3722 return annotations;
3723 }
3724
3725 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3726 const int super_class_index,
3727 const bool need_verify,
3728 TRAPS) {
3729 assert(cp != NULL, "invariant");
3730 const InstanceKlass* super_klass = NULL;
3731
3732 if (super_class_index == 0) {
3733 check_property(_class_name == vmSymbols::java_lang_Object(),
3734 "Invalid superclass index %u in class file %s",
3735 super_class_index,
3736 CHECK_NULL);
3737 } else {
3738 check_property(valid_klass_reference_at(super_class_index),
3739 "Invalid superclass index %u in class file %s",
3740 super_class_index,
3741 CHECK_NULL);
3742 // The class name should be legal because it is checked when parsing constant pool.
3743 // However, make sure it is not an array type.
3744 bool is_array = false;
3745 if (cp->tag_at(super_class_index).is_klass()) {
3746 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3747 if (need_verify)
3748 is_array = super_klass->is_array_klass();
3749 } else if (need_verify) {
3750 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3751 }
3752 if (need_verify) {
3753 guarantee_property(!is_array,
3754 "Bad superclass name in class file %s", CHECK_NULL);
3755 }
3756 }
3757 return super_klass;
3758 }
3759
3760 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3761 unsigned int nonstatic_oop_map_count,
3762 int first_nonstatic_oop_offset) {
3763
3764 unsigned int map_count =
3765 NULL == super ? 0 : super->nonstatic_oop_map_count();
3766 if (nonstatic_oop_map_count > 0) {
3767 // We have oops to add to map
3768 if (map_count == 0) {
3769 map_count = nonstatic_oop_map_count;
3770 }
3771 else {
3772 // Check whether we should add a new map block or whether the last one can
3773 // be extended
3774 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3775 const OopMapBlock* const last_map = first_map + map_count - 1;
3776
3777 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3778 if (next_offset == first_nonstatic_oop_offset) {
3779 // There is no gap bettwen superklass's last oop field and first
3780 // local oop field, merge maps.
3781 nonstatic_oop_map_count -= 1;
3782 }
3783 else {
3784 // Superklass didn't end with a oop field, add extra maps
3785 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3786 }
3787 map_count += nonstatic_oop_map_count;
3788 }
3789 }
3790 return map_count;
3791 }
3792
3793 #ifndef PRODUCT
3794 static void print_field_layout(const Symbol* name,
3795 Array<u2>* fields,
3796 const constantPoolHandle& cp,
3797 int instance_size,
3798 int instance_fields_start,
3799 int instance_fields_end,
3800 int static_fields_end) {
3801
3802 assert(name != NULL, "invariant");
3803
3804 tty->print("%s: field layout\n", name->as_klass_external_name());
3805 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3806 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3807 if (!fs.access_flags().is_static()) {
3808 tty->print(" @%3d \"%s\" %s\n",
3809 fs.offset(),
3810 fs.name()->as_klass_external_name(),
3811 fs.signature()->as_klass_external_name());
3812 }
3813 }
3814 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3815 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3816 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3817 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3818 if (fs.access_flags().is_static()) {
3819 tty->print(" @%3d \"%s\" %s\n",
3820 fs.offset(),
3821 fs.name()->as_klass_external_name(),
3822 fs.signature()->as_klass_external_name());
3823 }
3824 }
3825 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3826 tty->print("\n");
3827 }
3828 #endif
3829
3830 // Values needed for oopmap and InstanceKlass creation
3831 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3832 public:
3833 int* nonstatic_oop_offsets;
3834 unsigned int* nonstatic_oop_counts;
3835 unsigned int nonstatic_oop_map_count;
3836 unsigned int total_oop_map_count;
3837 int instance_size;
3838 int nonstatic_field_size;
3839 int static_field_size;
3840 bool has_nonstatic_fields;
3841 };
3842
3843 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3844 void ClassFileParser::layout_fields(ConstantPool* cp,
3845 const FieldAllocationCount* fac,
3846 const ClassAnnotationCollector* parsed_annotations,
3847 FieldLayoutInfo* info,
3848 TRAPS) {
3849
3850 assert(cp != NULL, "invariant");
3851
3852 // Field size and offset computation
3853 int nonstatic_field_size = _super_klass == NULL ? 0 :
3854 _super_klass->nonstatic_field_size();
3855
3856 // Count the contended fields by type.
3857 //
3858 // We ignore static fields, because @Contended is not supported for them.
3859 // The layout code below will also ignore the static fields.
3860 int nonstatic_contended_count = 0;
3861 FieldAllocationCount fac_contended;
3862 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3863 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3864 if (fs.is_contended()) {
3865 fac_contended.count[atype]++;
3866 if (!fs.access_flags().is_static()) {
3867 nonstatic_contended_count++;
3868 }
3869 }
3870 }
3871
3872
3873 // Calculate the starting byte offsets
3874 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3875 int next_static_double_offset = next_static_oop_offset +
3876 ((fac->count[STATIC_OOP]) * heapOopSize);
3877 if (fac->count[STATIC_DOUBLE]) {
3878 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3879 }
3880
3881 int next_static_word_offset = next_static_double_offset +
3882 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3883 int next_static_short_offset = next_static_word_offset +
3884 ((fac->count[STATIC_WORD]) * BytesPerInt);
3885 int next_static_byte_offset = next_static_short_offset +
3886 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3887
3888 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3889 nonstatic_field_size * heapOopSize;
3890
3891 int next_nonstatic_field_offset = nonstatic_fields_start;
3892
3893 const bool is_contended_class = parsed_annotations->is_contended();
3894
3895 // Class is contended, pad before all the fields
3896 if (is_contended_class) {
3897 next_nonstatic_field_offset += ContendedPaddingWidth;
3898 }
3899
3900 // Compute the non-contended fields count.
3901 // The packing code below relies on these counts to determine if some field
3902 // can be squeezed into the alignment gap. Contended fields are obviously
3903 // exempt from that.
3904 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3905 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3906 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3907 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3908 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3909
3910 // Total non-static fields count, including every contended field
3911 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3912 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3913 fac->count[NONSTATIC_OOP];
3914
3915 const bool super_has_nonstatic_fields =
3916 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3917 const bool has_nonstatic_fields =
3918 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3919
3920
3921 // Prepare list of oops for oop map generation.
3922 //
3923 // "offset" and "count" lists are describing the set of contiguous oop
3924 // regions. offset[i] is the start of the i-th region, which then has
3925 // count[i] oops following. Before we know how many regions are required,
3926 // we pessimistically allocate the maps to fit all the oops into the
3927 // distinct regions.
3928 //
3929 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3930 // to figure out if we still need to do this.
3931 unsigned int nonstatic_oop_map_count = 0;
3932 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3933
3934 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3935 THREAD, int, max_nonstatic_oop_maps);
3936 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3937 THREAD, unsigned int, max_nonstatic_oop_maps);
3938
3939 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3940
3941 bool compact_fields = CompactFields;
3942 int allocation_style = FieldsAllocationStyle;
3943 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3944 assert(false, "0 <= FieldsAllocationStyle <= 2");
3945 allocation_style = 1; // Optimistic
3946 }
3947
3948 // The next classes have predefined hard-coded fields offsets
3949 // (see in JavaClasses::compute_hard_coded_offsets()).
3950 // Use default fields allocation order for them.
3951 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3952 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3953 _class_name == vmSymbols::java_lang_Class() ||
3954 _class_name == vmSymbols::java_lang_ClassLoader() ||
3955 _class_name == vmSymbols::java_lang_ref_Reference() ||
3956 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3957 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3958 _class_name == vmSymbols::java_lang_String() ||
3959 _class_name == vmSymbols::java_lang_Throwable() ||
3960 _class_name == vmSymbols::java_lang_Boolean() ||
3961 _class_name == vmSymbols::java_lang_Character() ||
3962 _class_name == vmSymbols::java_lang_Float() ||
3963 _class_name == vmSymbols::java_lang_Double() ||
3964 _class_name == vmSymbols::java_lang_Byte() ||
3965 _class_name == vmSymbols::java_lang_Short() ||
3966 _class_name == vmSymbols::java_lang_Integer() ||
3967 _class_name == vmSymbols::java_lang_Long())) {
3968 allocation_style = 0; // Allocate oops first
3969 compact_fields = false; // Don't compact fields
3970 }
3971
3972 int next_nonstatic_oop_offset = 0;
3973 int next_nonstatic_double_offset = 0;
3974
3975 // Rearrange fields for a given allocation style
3976 if( allocation_style == 0 ) {
3977 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3978 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3979 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3980 (nonstatic_oop_count * heapOopSize);
3981 } else if( allocation_style == 1 ) {
3982 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3983 next_nonstatic_double_offset = next_nonstatic_field_offset;
3984 } else if( allocation_style == 2 ) {
3985 // Fields allocation: oops fields in super and sub classes are together.
3986 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3987 _super_klass->nonstatic_oop_map_size() > 0 ) {
3988 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3989 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3990 const OopMapBlock* const last_map = first_map + map_count - 1;
3991 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3992 if (next_offset == next_nonstatic_field_offset) {
3993 allocation_style = 0; // allocate oops first
3994 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3995 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3996 (nonstatic_oop_count * heapOopSize);
3997 }
3998 }
3999 if( allocation_style == 2 ) {
4000 allocation_style = 1; // allocate oops last
4001 next_nonstatic_double_offset = next_nonstatic_field_offset;
4002 }
4003 } else {
4004 ShouldNotReachHere();
4005 }
4006
4007 int nonstatic_oop_space_count = 0;
4008 int nonstatic_word_space_count = 0;
4009 int nonstatic_short_space_count = 0;
4010 int nonstatic_byte_space_count = 0;
4011 int nonstatic_oop_space_offset = 0;
4012 int nonstatic_word_space_offset = 0;
4013 int nonstatic_short_space_offset = 0;
4014 int nonstatic_byte_space_offset = 0;
4015
4016 // Try to squeeze some of the fields into the gaps due to
4017 // long/double alignment.
4018 if (nonstatic_double_count > 0) {
4019 int offset = next_nonstatic_double_offset;
4020 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
4021 if (compact_fields && offset != next_nonstatic_double_offset) {
4022 // Allocate available fields into the gap before double field.
4023 int length = next_nonstatic_double_offset - offset;
4024 assert(length == BytesPerInt, "");
4025 nonstatic_word_space_offset = offset;
4026 if (nonstatic_word_count > 0) {
4027 nonstatic_word_count -= 1;
4028 nonstatic_word_space_count = 1; // Only one will fit
4029 length -= BytesPerInt;
4030 offset += BytesPerInt;
4031 }
4032 nonstatic_short_space_offset = offset;
4033 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4034 nonstatic_short_count -= 1;
4035 nonstatic_short_space_count += 1;
4036 length -= BytesPerShort;
4037 offset += BytesPerShort;
4038 }
4039 nonstatic_byte_space_offset = offset;
4040 while (length > 0 && nonstatic_byte_count > 0) {
4041 nonstatic_byte_count -= 1;
4042 nonstatic_byte_space_count += 1;
4043 length -= 1;
4044 }
4045 // Allocate oop field in the gap if there are no other fields for that.
4046 nonstatic_oop_space_offset = offset;
4047 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4048 allocation_style != 0) { // when oop fields not first
4049 nonstatic_oop_count -= 1;
4050 nonstatic_oop_space_count = 1; // Only one will fit
4051 length -= heapOopSize;
4052 offset += heapOopSize;
4053 }
4054 }
4055 }
4056
4057 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4058 (nonstatic_double_count * BytesPerLong);
4059 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4060 (nonstatic_word_count * BytesPerInt);
4061 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4062 (nonstatic_short_count * BytesPerShort);
4063 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4064 nonstatic_byte_count;
4065
4066 // let oops jump before padding with this allocation style
4067 if( allocation_style == 1 ) {
4068 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4069 if( nonstatic_oop_count > 0 ) {
4070 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4071 }
4072 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4073 }
4074
4075 // Iterate over fields again and compute correct offsets.
4076 // The field allocation type was temporarily stored in the offset slot.
4077 // oop fields are located before non-oop fields (static and non-static).
4078 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4079
4080 // skip already laid out fields
4081 if (fs.is_offset_set()) continue;
4082
4083 // contended instance fields are handled below
4084 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4085
4086 int real_offset = 0;
4087 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4088
4089 // pack the rest of the fields
4090 switch (atype) {
4091 case STATIC_OOP:
4092 real_offset = next_static_oop_offset;
4093 next_static_oop_offset += heapOopSize;
4094 break;
4095 case STATIC_BYTE:
4096 real_offset = next_static_byte_offset;
4097 next_static_byte_offset += 1;
4098 break;
4099 case STATIC_SHORT:
4100 real_offset = next_static_short_offset;
4101 next_static_short_offset += BytesPerShort;
4102 break;
4103 case STATIC_WORD:
4104 real_offset = next_static_word_offset;
4105 next_static_word_offset += BytesPerInt;
4106 break;
4107 case STATIC_DOUBLE:
4108 real_offset = next_static_double_offset;
4109 next_static_double_offset += BytesPerLong;
4110 break;
4111 case NONSTATIC_OOP:
4112 if( nonstatic_oop_space_count > 0 ) {
4113 real_offset = nonstatic_oop_space_offset;
4114 nonstatic_oop_space_offset += heapOopSize;
4115 nonstatic_oop_space_count -= 1;
4116 } else {
4117 real_offset = next_nonstatic_oop_offset;
4118 next_nonstatic_oop_offset += heapOopSize;
4119 }
4120
4121 // Record this oop in the oop maps
4122 if( nonstatic_oop_map_count > 0 &&
4123 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4124 real_offset -
4125 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4126 heapOopSize ) {
4127 // This oop is adjacent to the previous one, add to current oop map
4128 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4129 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4130 } else {
4131 // This oop is not adjacent to the previous one, create new oop map
4132 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4133 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4134 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4135 nonstatic_oop_map_count += 1;
4136 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4137 first_nonstatic_oop_offset = real_offset;
4138 }
4139 }
4140 break;
4141 case NONSTATIC_BYTE:
4142 if( nonstatic_byte_space_count > 0 ) {
4143 real_offset = nonstatic_byte_space_offset;
4144 nonstatic_byte_space_offset += 1;
4145 nonstatic_byte_space_count -= 1;
4146 } else {
4147 real_offset = next_nonstatic_byte_offset;
4148 next_nonstatic_byte_offset += 1;
4149 }
4150 break;
4151 case NONSTATIC_SHORT:
4152 if( nonstatic_short_space_count > 0 ) {
4153 real_offset = nonstatic_short_space_offset;
4154 nonstatic_short_space_offset += BytesPerShort;
4155 nonstatic_short_space_count -= 1;
4156 } else {
4157 real_offset = next_nonstatic_short_offset;
4158 next_nonstatic_short_offset += BytesPerShort;
4159 }
4160 break;
4161 case NONSTATIC_WORD:
4162 if( nonstatic_word_space_count > 0 ) {
4163 real_offset = nonstatic_word_space_offset;
4164 nonstatic_word_space_offset += BytesPerInt;
4165 nonstatic_word_space_count -= 1;
4166 } else {
4167 real_offset = next_nonstatic_word_offset;
4168 next_nonstatic_word_offset += BytesPerInt;
4169 }
4170 break;
4171 case NONSTATIC_DOUBLE:
4172 real_offset = next_nonstatic_double_offset;
4173 next_nonstatic_double_offset += BytesPerLong;
4174 break;
4175 default:
4176 ShouldNotReachHere();
4177 }
4178 fs.set_offset(real_offset);
4179 }
4180
4181
4182 // Handle the contended cases.
4183 //
4184 // Each contended field should not intersect the cache line with another contended field.
4185 // In the absence of alignment information, we end up with pessimistically separating
4186 // the fields with full-width padding.
4187 //
4188 // Additionally, this should not break alignment for the fields, so we round the alignment up
4189 // for each field.
4190 if (nonstatic_contended_count > 0) {
4191
4192 // if there is at least one contended field, we need to have pre-padding for them
4193 next_nonstatic_padded_offset += ContendedPaddingWidth;
4194
4195 // collect all contended groups
4196 ResourceBitMap bm(cp->size());
4197 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4198 // skip already laid out fields
4199 if (fs.is_offset_set()) continue;
4200
4201 if (fs.is_contended()) {
4202 bm.set_bit(fs.contended_group());
4203 }
4204 }
4205
4206 int current_group = -1;
4207 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4208
4209 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4210
4211 // skip already laid out fields
4212 if (fs.is_offset_set()) continue;
4213
4214 // skip non-contended fields and fields from different group
4215 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4216
4217 // handle statics below
4218 if (fs.access_flags().is_static()) continue;
4219
4220 int real_offset = 0;
4221 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4222
4223 switch (atype) {
4224 case NONSTATIC_BYTE:
4225 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4226 real_offset = next_nonstatic_padded_offset;
4227 next_nonstatic_padded_offset += 1;
4228 break;
4229
4230 case NONSTATIC_SHORT:
4231 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4232 real_offset = next_nonstatic_padded_offset;
4233 next_nonstatic_padded_offset += BytesPerShort;
4234 break;
4235
4236 case NONSTATIC_WORD:
4237 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4238 real_offset = next_nonstatic_padded_offset;
4239 next_nonstatic_padded_offset += BytesPerInt;
4240 break;
4241
4242 case NONSTATIC_DOUBLE:
4243 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4244 real_offset = next_nonstatic_padded_offset;
4245 next_nonstatic_padded_offset += BytesPerLong;
4246 break;
4247
4248 case NONSTATIC_OOP:
4249 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4250 real_offset = next_nonstatic_padded_offset;
4251 next_nonstatic_padded_offset += heapOopSize;
4252
4253 // Record this oop in the oop maps
4254 if( nonstatic_oop_map_count > 0 &&
4255 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4256 real_offset -
4257 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4258 heapOopSize ) {
4259 // This oop is adjacent to the previous one, add to current oop map
4260 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4261 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4262 } else {
4263 // This oop is not adjacent to the previous one, create new oop map
4264 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4265 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4266 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4267 nonstatic_oop_map_count += 1;
4268 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4269 first_nonstatic_oop_offset = real_offset;
4270 }
4271 }
4272 break;
4273
4274 default:
4275 ShouldNotReachHere();
4276 }
4277
4278 if (fs.contended_group() == 0) {
4279 // Contended group defines the equivalence class over the fields:
4280 // the fields within the same contended group are not inter-padded.
4281 // The only exception is default group, which does not incur the
4282 // equivalence, and so requires intra-padding.
4283 next_nonstatic_padded_offset += ContendedPaddingWidth;
4284 }
4285
4286 fs.set_offset(real_offset);
4287 } // for
4288
4289 // Start laying out the next group.
4290 // Note that this will effectively pad the last group in the back;
4291 // this is expected to alleviate memory contention effects for
4292 // subclass fields and/or adjacent object.
4293 // If this was the default group, the padding is already in place.
4294 if (current_group != 0) {
4295 next_nonstatic_padded_offset += ContendedPaddingWidth;
4296 }
4297 }
4298
4299 // handle static fields
4300 }
4301
4302 // Entire class is contended, pad in the back.
4303 // This helps to alleviate memory contention effects for subclass fields
4304 // and/or adjacent object.
4305 if (is_contended_class) {
4306 next_nonstatic_padded_offset += ContendedPaddingWidth;
4307 }
4308
4309 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4310
4311 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, heapOopSize);
4312 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4313 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4314
4315 int static_field_size = (static_fields_end -
4316 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4317 nonstatic_field_size = nonstatic_field_size +
4318 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4319
4320 int instance_size = align_object_size(instance_end / wordSize);
4321
4322 assert(instance_size == align_object_size(align_up(
4323 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4324 wordSize) / wordSize), "consistent layout helper value");
4325
4326 // Invariant: nonstatic_field end/start should only change if there are
4327 // nonstatic fields in the class, or if the class is contended. We compare
4328 // against the non-aligned value, so that end alignment will not fail the
4329 // assert without actually having the fields.
4330 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4331 is_contended_class ||
4332 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4333
4334 // Number of non-static oop map blocks allocated at end of klass.
4335 const unsigned int total_oop_map_count =
4336 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4337 first_nonstatic_oop_offset);
4338
4339 #ifndef PRODUCT
4340 if (PrintFieldLayout) {
4341 print_field_layout(_class_name,
4342 _fields,
4343 cp,
4344 instance_size,
4345 nonstatic_fields_start,
4346 nonstatic_fields_end,
4347 static_fields_end);
4348 }
4349
4350 #endif
4351 // Pass back information needed for InstanceKlass creation
4352 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4353 info->nonstatic_oop_counts = nonstatic_oop_counts;
4354 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4355 info->total_oop_map_count = total_oop_map_count;
4356 info->instance_size = instance_size;
4357 info->static_field_size = static_field_size;
4358 info->nonstatic_field_size = nonstatic_field_size;
4359 info->has_nonstatic_fields = has_nonstatic_fields;
4360 }
4361
4362 static void fill_oop_maps(const InstanceKlass* k,
4363 unsigned int nonstatic_oop_map_count,
4364 const int* nonstatic_oop_offsets,
4365 const unsigned int* nonstatic_oop_counts) {
4366
4367 assert(k != NULL, "invariant");
4368
4369 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4370 const InstanceKlass* const super = k->superklass();
4371 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4372 if (super_count > 0) {
4373 // Copy maps from superklass
4374 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4375 for (unsigned int i = 0; i < super_count; ++i) {
4376 *this_oop_map++ = *super_oop_map++;
4377 }
4378 }
4379
4380 if (nonstatic_oop_map_count > 0) {
4381 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4382 // The counts differ because there is no gap between superklass's last oop
4383 // field and the first local oop field. Extend the last oop map copied
4384 // from the superklass instead of creating new one.
4385 nonstatic_oop_map_count--;
4386 nonstatic_oop_offsets++;
4387 this_oop_map--;
4388 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4389 this_oop_map++;
4390 }
4391
4392 // Add new map blocks, fill them
4393 while (nonstatic_oop_map_count-- > 0) {
4394 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4395 this_oop_map->set_count(*nonstatic_oop_counts++);
4396 this_oop_map++;
4397 }
4398 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4399 this_oop_map, "sanity");
4400 }
4401 }
4402
4403
4404 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4405 assert(ik != NULL, "invariant");
4406
4407 const Klass* const super = ik->super();
4408
4409 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4410 // in which case we don't have to register objects as finalizable
4411 if (!_has_empty_finalizer) {
4412 if (_has_finalizer ||
4413 (super != NULL && super->has_finalizer())) {
4414 ik->set_has_finalizer();
4415 }
4416 }
4417
4418 #ifdef ASSERT
4419 bool f = false;
4420 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4421 vmSymbols::void_method_signature());
4422 if (m != NULL && !m->is_empty_method()) {
4423 f = true;
4424 }
4425
4426 // Spec doesn't prevent agent from redefinition of empty finalizer.
4427 // Despite the fact that it's generally bad idea and redefined finalizer
4428 // will not work as expected we shouldn't abort vm in this case
4429 if (!ik->has_redefined_this_or_super()) {
4430 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4431 }
4432 #endif
4433
4434 // Check if this klass supports the java.lang.Cloneable interface
4435 if (SystemDictionary::Cloneable_klass_loaded()) {
4436 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4437 ik->set_is_cloneable();
4438 }
4439 }
4440
4441 // Check if this klass has a vanilla default constructor
4442 if (super == NULL) {
4443 // java.lang.Object has empty default constructor
4444 ik->set_has_vanilla_constructor();
4445 } else {
4446 if (super->has_vanilla_constructor() &&
4447 _has_vanilla_constructor) {
4448 ik->set_has_vanilla_constructor();
4449 }
4450 #ifdef ASSERT
4451 bool v = false;
4452 if (super->has_vanilla_constructor()) {
4453 const Method* const constructor =
4454 ik->find_method(vmSymbols::object_initializer_name(),
4455 vmSymbols::void_method_signature());
4456 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4457 v = true;
4458 }
4459 }
4460 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4461 #endif
4462 }
4463
4464 // If it cannot be fast-path allocated, set a bit in the layout helper.
4465 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4466 assert(ik->size_helper() > 0, "layout_helper is initialized");
4467 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4468 || ik->is_abstract() || ik->is_interface()
4469 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4470 || ik->size_helper() >= FastAllocateSizeLimit) {
4471 // Forbid fast-path allocation.
4472 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4473 ik->set_layout_helper(lh);
4474 }
4475 }
4476
4477 // Attach super classes and interface classes to class loader data
4478 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4479 TRAPS) {
4480 assert(defined_klass != NULL, "invariant");
4481
4482 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4483 if (defining_loader_data->is_the_null_class_loader_data()) {
4484 // Dependencies to null class loader data are implicit.
4485 return;
4486 } else {
4487 // add super class dependency
4488 Klass* const super = defined_klass->super();
4489 if (super != NULL) {
4490 defining_loader_data->record_dependency(super);
4491 }
4492
4493 // add super interface dependencies
4494 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4495 if (local_interfaces != NULL) {
4496 const int length = local_interfaces->length();
4497 for (int i = 0; i < length; i++) {
4498 defining_loader_data->record_dependency(local_interfaces->at(i));
4499 }
4500 }
4501 }
4502 }
4503
4504 // utility methods for appending an array with check for duplicates
4505
4506 static void append_interfaces(GrowableArray<Klass*>* result,
4507 const Array<Klass*>* const ifs) {
4508 // iterate over new interfaces
4509 for (int i = 0; i < ifs->length(); i++) {
4510 Klass* const e = ifs->at(i);
4511 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4512 // add new interface
4513 result->append_if_missing(e);
4514 }
4515 }
4516
4517 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4518 Array<Klass*>* local_ifs,
4519 ClassLoaderData* loader_data,
4520 TRAPS) {
4521 assert(local_ifs != NULL, "invariant");
4522 assert(loader_data != NULL, "invariant");
4523
4524 // Compute maximum size for transitive interfaces
4525 int max_transitive_size = 0;
4526 int super_size = 0;
4527 // Add superclass transitive interfaces size
4528 if (super != NULL) {
4529 super_size = super->transitive_interfaces()->length();
4530 max_transitive_size += super_size;
4531 }
4532 // Add local interfaces' super interfaces
4533 const int local_size = local_ifs->length();
4534 for (int i = 0; i < local_size; i++) {
4535 Klass* const l = local_ifs->at(i);
4536 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4537 }
4538 // Finally add local interfaces
4539 max_transitive_size += local_size;
4540 // Construct array
4541 if (max_transitive_size == 0) {
4542 // no interfaces, use canonicalized array
4543 return Universe::the_empty_klass_array();
4544 } else if (max_transitive_size == super_size) {
4545 // no new local interfaces added, share superklass' transitive interface array
4546 return super->transitive_interfaces();
4547 } else if (max_transitive_size == local_size) {
4548 // only local interfaces added, share local interface array
4549 return local_ifs;
4550 } else {
4551 ResourceMark rm;
4552 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4553
4554 // Copy down from superclass
4555 if (super != NULL) {
4556 append_interfaces(result, super->transitive_interfaces());
4557 }
4558
4559 // Copy down from local interfaces' superinterfaces
4560 for (int i = 0; i < local_size; i++) {
4561 Klass* const l = local_ifs->at(i);
4562 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4563 }
4564 // Finally add local interfaces
4565 append_interfaces(result, local_ifs);
4566
4567 // length will be less than the max_transitive_size if duplicates were removed
4568 const int length = result->length();
4569 assert(length <= max_transitive_size, "just checking");
4570 Array<Klass*>* const new_result =
4571 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4572 for (int i = 0; i < length; i++) {
4573 Klass* const e = result->at(i);
4574 assert(e != NULL, "just checking");
4575 new_result->at_put(i, e);
4576 }
4577 return new_result;
4578 }
4579 }
4580
4581 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4582 assert(this_klass != NULL, "invariant");
4583 const Klass* const super = this_klass->super();
4584 if (super != NULL) {
4585
4586 // If the loader is not the boot loader then throw an exception if its
4587 // superclass is in package jdk.internal.reflect and its loader is not a
4588 // special reflection class loader
4589 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4590 assert(super->is_instance_klass(), "super is not instance klass");
4591 PackageEntry* super_package = super->package();
4592 if (super_package != NULL &&
4593 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4594 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4595 ResourceMark rm(THREAD);
4596 Exceptions::fthrow(
4597 THREAD_AND_LOCATION,
4598 vmSymbols::java_lang_IllegalAccessError(),
4599 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4600 this_klass->external_name(),
4601 this_klass->class_loader_data()->loader_name_and_id(),
4602 super->external_name());
4603 return;
4604 }
4605 }
4606
4607 Reflection::VerifyClassAccessResults vca_result =
4608 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4609 if (vca_result != Reflection::ACCESS_OK) {
4610 ResourceMark rm(THREAD);
4611 char* msg = Reflection::verify_class_access_msg(this_klass,
4612 InstanceKlass::cast(super),
4613 vca_result);
4614 if (msg == NULL) {
4615 bool same_module = (this_klass->module() == super->module());
4616 Exceptions::fthrow(
4617 THREAD_AND_LOCATION,
4618 vmSymbols::java_lang_IllegalAccessError(),
4619 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4620 this_klass->external_name(),
4621 super->is_abstract() ? "abstract " : "",
4622 super->external_name(),
4623 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4624 (same_module) ? "" : "; ",
4625 (same_module) ? "" : super->class_in_module_of_loader());
4626 } else {
4627 // Add additional message content.
4628 Exceptions::fthrow(
4629 THREAD_AND_LOCATION,
4630 vmSymbols::java_lang_IllegalAccessError(),
4631 "superclass access check failed: %s",
4632 msg);
4633 }
4634 }
4635 }
4636 }
4637
4638
4639 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4640 assert(this_klass != NULL, "invariant");
4641 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4642 const int lng = local_interfaces->length();
4643 for (int i = lng - 1; i >= 0; i--) {
4644 Klass* const k = local_interfaces->at(i);
4645 assert (k != NULL && k->is_interface(), "invalid interface");
4646 Reflection::VerifyClassAccessResults vca_result =
4647 Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false);
4648 if (vca_result != Reflection::ACCESS_OK) {
4649 ResourceMark rm(THREAD);
4650 char* msg = Reflection::verify_class_access_msg(this_klass,
4651 InstanceKlass::cast(k),
4652 vca_result);
4653 if (msg == NULL) {
4654 bool same_module = (this_klass->module() == k->module());
4655 Exceptions::fthrow(
4656 THREAD_AND_LOCATION,
4657 vmSymbols::java_lang_IllegalAccessError(),
4658 "class %s cannot access its superinterface %s (%s%s%s)",
4659 this_klass->external_name(),
4660 k->external_name(),
4661 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4662 (same_module) ? "" : "; ",
4663 (same_module) ? "" : k->class_in_module_of_loader());
4664 } else {
4665 // Add additional message content.
4666 Exceptions::fthrow(
4667 THREAD_AND_LOCATION,
4668 vmSymbols::java_lang_IllegalAccessError(),
4669 "superinterface check failed: %s",
4670 msg);
4671 }
4672 }
4673 }
4674 }
4675
4676
4677 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4678 assert(this_klass != NULL, "invariant");
4679 const Array<Method*>* const methods = this_klass->methods();
4680 const int num_methods = methods->length();
4681
4682 // go thru each method and check if it overrides a final method
4683 for (int index = 0; index < num_methods; index++) {
4684 const Method* const m = methods->at(index);
4685
4686 // skip private, static, and <init> methods
4687 if ((!m->is_private() && !m->is_static()) &&
4688 (m->name() != vmSymbols::object_initializer_name())) {
4689
4690 const Symbol* const name = m->name();
4691 const Symbol* const signature = m->signature();
4692 const Klass* k = this_klass->super();
4693 const Method* super_m = NULL;
4694 while (k != NULL) {
4695 // skip supers that don't have final methods.
4696 if (k->has_final_method()) {
4697 // lookup a matching method in the super class hierarchy
4698 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4699 if (super_m == NULL) {
4700 break; // didn't find any match; get out
4701 }
4702
4703 if (super_m->is_final() && !super_m->is_static() &&
4704 !super_m->access_flags().is_private()) {
4705 // matching method in super is final, and not static or private
4706 bool can_access = Reflection::verify_member_access(this_klass,
4707 super_m->method_holder(),
4708 super_m->method_holder(),
4709 super_m->access_flags(),
4710 false, false, CHECK);
4711 if (can_access) {
4712 // this class can access super final method and therefore override
4713 ResourceMark rm(THREAD);
4714 Exceptions::fthrow(THREAD_AND_LOCATION,
4715 vmSymbols::java_lang_VerifyError(),
4716 "class %s overrides final method %s.%s%s",
4717 this_klass->external_name(),
4718 super_m->method_holder()->external_name(),
4719 name->as_C_string(),
4720 signature->as_C_string()
4721 );
4722 return;
4723 }
4724 }
4725
4726 // continue to look from super_m's holder's super.
4727 k = super_m->method_holder()->super();
4728 continue;
4729 }
4730
4731 k = k->super();
4732 }
4733 }
4734 }
4735 }
4736
4737
4738 // assumes that this_klass is an interface
4739 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4740 assert(this_klass != NULL, "invariant");
4741 assert(this_klass->is_interface(), "not an interface");
4742 const Array<Method*>* methods = this_klass->methods();
4743 const int num_methods = methods->length();
4744
4745 for (int index = 0; index < num_methods; index++) {
4746 const Method* const m = methods->at(index);
4747 // if m is static and not the init method, throw a verify error
4748 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4749 ResourceMark rm(THREAD);
4750 Exceptions::fthrow(
4751 THREAD_AND_LOCATION,
4752 vmSymbols::java_lang_VerifyError(),
4753 "Illegal static method %s in interface %s",
4754 m->name()->as_C_string(),
4755 this_klass->external_name()
4756 );
4757 return;
4758 }
4759 }
4760 }
4761
4762 // utility methods for format checking
4763
4764 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4765 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4766 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4767 if (is_module) {
4768 ResourceMark rm(THREAD);
4769 Exceptions::fthrow(
4770 THREAD_AND_LOCATION,
4771 vmSymbols::java_lang_NoClassDefFoundError(),
4772 "%s is not a class because access_flag ACC_MODULE is set",
4773 _class_name->as_C_string());
4774 return;
4775 }
4776
4777 if (!_need_verify) { return; }
4778
4779 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4780 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4781 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4782 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4783 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4784 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4785 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4786
4787 if ((is_abstract && is_final) ||
4788 (is_interface && !is_abstract) ||
4789 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4790 (!is_interface && major_gte_15 && is_annotation)) {
4791 ResourceMark rm(THREAD);
4792 Exceptions::fthrow(
4793 THREAD_AND_LOCATION,
4794 vmSymbols::java_lang_ClassFormatError(),
4795 "Illegal class modifiers in class %s: 0x%X",
4796 _class_name->as_C_string(), flags
4797 );
4798 return;
4799 }
4800 }
4801
4802 static bool has_illegal_visibility(jint flags) {
4803 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4804 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4805 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4806
4807 return ((is_public && is_protected) ||
4808 (is_public && is_private) ||
4809 (is_protected && is_private));
4810 }
4811
4812 // A legal major_version.minor_version must be one of the following:
4813 //
4814 // Major_version = 45, any minor_version.
4815 // Major_version >= 46 and major_version <= current_major_version and minor_version = 0.
4816 // Major_version = current_major_version and minor_version = 65535 and --enable-preview is present.
4817 //
4818 static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4819 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4820 if (major != JAVA_MIN_SUPPORTED_VERSION) { // All 45.* are ok including 45.65535
4821 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4822 if (major != max_version) {
4823 ResourceMark rm(THREAD);
4824 Exceptions::fthrow(
4825 THREAD_AND_LOCATION,
4826 vmSymbols::java_lang_UnsupportedClassVersionError(),
4827 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4828 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4829 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4830 return;
4831 }
4832
4833 if (!Arguments::enable_preview()) {
4834 ResourceMark rm(THREAD);
4835 Exceptions::fthrow(
4836 THREAD_AND_LOCATION,
4837 vmSymbols::java_lang_UnsupportedClassVersionError(),
4838 "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4839 class_name->as_C_string(), major, minor);
4840 return;
4841 }
4842
4843 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4844 if (major > max_version) {
4845 ResourceMark rm(THREAD);
4846 Exceptions::fthrow(
4847 THREAD_AND_LOCATION,
4848 vmSymbols::java_lang_UnsupportedClassVersionError(),
4849 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4850 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4851 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4852 } else if (major < JAVA_MIN_SUPPORTED_VERSION) {
4853 ResourceMark rm(THREAD);
4854 Exceptions::fthrow(
4855 THREAD_AND_LOCATION,
4856 vmSymbols::java_lang_UnsupportedClassVersionError(),
4857 "%s (class file version %u.%u) was compiled with an invalid major version",
4858 class_name->as_C_string(), major, minor);
4859 } else if (minor != 0) {
4860 ResourceMark rm(THREAD);
4861 Exceptions::fthrow(
4862 THREAD_AND_LOCATION,
4863 vmSymbols::java_lang_UnsupportedClassVersionError(),
4864 "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4865 class_name->as_C_string(), major, minor);
4866 }
4867 }
4868 }
4869 }
4870
4871 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4872 bool is_interface,
4873 TRAPS) const {
4874 if (!_need_verify) { return; }
4875
4876 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4877 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4878 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4879 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4880 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4881 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4882 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4883 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4884 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4885
4886 bool is_illegal = false;
4887
4888 if (is_interface) {
4889 if (!is_public || !is_static || !is_final || is_private ||
4890 is_protected || is_volatile || is_transient ||
4891 (major_gte_15 && is_enum)) {
4892 is_illegal = true;
4893 }
4894 } else { // not interface
4895 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4896 is_illegal = true;
4897 }
4898 }
4899
4900 if (is_illegal) {
4901 ResourceMark rm(THREAD);
4902 Exceptions::fthrow(
4903 THREAD_AND_LOCATION,
4904 vmSymbols::java_lang_ClassFormatError(),
4905 "Illegal field modifiers in class %s: 0x%X",
4906 _class_name->as_C_string(), flags);
4907 return;
4908 }
4909 }
4910
4911 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4912 bool is_interface,
4913 const Symbol* name,
4914 TRAPS) const {
4915 if (!_need_verify) { return; }
4916
4917 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4918 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4919 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4920 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4921 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4922 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4923 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4924 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4925 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4926 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4927 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4928 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4929 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4930
4931 bool is_illegal = false;
4932
4933 if (is_interface) {
4934 if (major_gte_8) {
4935 // Class file version is JAVA_8_VERSION or later Methods of
4936 // interfaces may set any of the flags except ACC_PROTECTED,
4937 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4938 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4939 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4940 (is_native || is_protected || is_final || is_synchronized) ||
4941 // If a specific method of a class or interface has its
4942 // ACC_ABSTRACT flag set, it must not have any of its
4943 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4944 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4945 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4946 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4947 (is_abstract && (is_private || is_static || is_strict))) {
4948 is_illegal = true;
4949 }
4950 } else if (major_gte_15) {
4951 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4952 if (!is_public || is_private || is_protected || is_static || is_final ||
4953 is_synchronized || is_native || !is_abstract || is_strict) {
4954 is_illegal = true;
4955 }
4956 } else {
4957 // Class file version is pre-JAVA_1_5_VERSION
4958 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4959 is_illegal = true;
4960 }
4961 }
4962 } else { // not interface
4963 if (has_illegal_visibility(flags)) {
4964 is_illegal = true;
4965 } else {
4966 if (is_initializer) {
4967 if (is_static || is_final || is_synchronized || is_native ||
4968 is_abstract || (major_gte_15 && is_bridge)) {
4969 is_illegal = true;
4970 }
4971 } else { // not initializer
4972 if (is_abstract) {
4973 if ((is_final || is_native || is_private || is_static ||
4974 (major_gte_15 && (is_synchronized || is_strict)))) {
4975 is_illegal = true;
4976 }
4977 }
4978 }
4979 }
4980 }
4981
4982 if (is_illegal) {
4983 ResourceMark rm(THREAD);
4984 Exceptions::fthrow(
4985 THREAD_AND_LOCATION,
4986 vmSymbols::java_lang_ClassFormatError(),
4987 "Method %s in class %s has illegal modifiers: 0x%X",
4988 name->as_C_string(), _class_name->as_C_string(), flags);
4989 return;
4990 }
4991 }
4992
4993 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4994 int length,
4995 TRAPS) const {
4996 assert(_need_verify, "only called when _need_verify is true");
4997 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4998 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4999 }
5000 }
5001
5002 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5003 // In class names, '/' separates unqualified names. This is verified in this function also.
5004 // Method names also may not contain the characters '<' or '>', unless <init>
5005 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5006 // method. Because these names have been checked as special cases before
5007 // calling this method in verify_legal_method_name.
5008 //
5009 // This method is also called from the modular system APIs in modules.cpp
5010 // to verify the validity of module and package names.
5011 bool ClassFileParser::verify_unqualified_name(const char* name,
5012 unsigned int length,
5013 int type) {
5014 for (const char* p = name; p != name + length;) {
5015 jchar ch = *p;
5016 if (ch < 128) {
5017 if (ch == '.' || ch == ';' || ch == '[' ) {
5018 return false; // do not permit '.', ';', or '['
5019 }
5020 if (ch == '/') {
5021 // check for '//' or leading or trailing '/' which are not legal
5022 // unqualified name must not be empty
5023 if (type == ClassFileParser::LegalClass) {
5024 if (p == name || p+1 >= name+length || *(p+1) == '/') {
5025 return false;
5026 }
5027 } else {
5028 return false; // do not permit '/' unless it's class name
5029 }
5030 }
5031 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
5032 return false; // do not permit '<' or '>' in method names
5033 }
5034 p++;
5035 } else {
5036 char* tmp_p = UTF8::next(p, &ch);
5037 p = tmp_p;
5038 }
5039 }
5040 return true;
5041 }
5042
5043 // Take pointer to a string. Skip over the longest part of the string that could
5044 // be taken as a fieldname. Allow '/' if slash_ok is true.
5045 // Return a pointer to just past the fieldname.
5046 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5047 // being true, we saw consecutive slashes (meaning we were looking for a
5048 // qualified path but found something that was badly-formed).
5049 static const char* skip_over_field_name(const char* name,
5050 bool slash_ok,
5051 unsigned int length) {
5052 const char* p;
5053 jboolean last_is_slash = false;
5054 jboolean not_first_ch = false;
5055
5056 for (p = name; p != name + length; not_first_ch = true) {
5057 const char* old_p = p;
5058 jchar ch = *p;
5059 if (ch < 128) {
5060 p++;
5061 // quick check for ascii
5062 if ((ch >= 'a' && ch <= 'z') ||
5063 (ch >= 'A' && ch <= 'Z') ||
5064 (ch == '_' || ch == '$') ||
5065 (not_first_ch && ch >= '0' && ch <= '9')) {
5066 last_is_slash = false;
5067 continue;
5068 }
5069 if (slash_ok && ch == '/') {
5070 if (last_is_slash) {
5071 return NULL; // Don't permit consecutive slashes
5072 }
5073 last_is_slash = true;
5074 continue;
5075 }
5076 }
5077 else {
5078 jint unicode_ch;
5079 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5080 p = tmp_p;
5081 last_is_slash = false;
5082 // Check if ch is Java identifier start or is Java identifier part
5083 // 4672820: call java.lang.Character methods directly without generating separate tables.
5084 EXCEPTION_MARK;
5085
5086 // return value
5087 JavaValue result(T_BOOLEAN);
5088 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
5089 JavaCallArguments args;
5090 args.push_int(unicode_ch);
5091
5092 // public static boolean isJavaIdentifierStart(char ch);
5093 JavaCalls::call_static(&result,
5094 SystemDictionary::Character_klass(),
5095 vmSymbols::isJavaIdentifierStart_name(),
5096 vmSymbols::int_bool_signature(),
5097 &args,
5098 THREAD);
5099
5100 if (HAS_PENDING_EXCEPTION) {
5101 CLEAR_PENDING_EXCEPTION;
5102 return 0;
5103 }
5104 if (result.get_jboolean()) {
5105 continue;
5106 }
5107
5108 if (not_first_ch) {
5109 // public static boolean isJavaIdentifierPart(char ch);
5110 JavaCalls::call_static(&result,
5111 SystemDictionary::Character_klass(),
5112 vmSymbols::isJavaIdentifierPart_name(),
5113 vmSymbols::int_bool_signature(),
5114 &args,
5115 THREAD);
5116
5117 if (HAS_PENDING_EXCEPTION) {
5118 CLEAR_PENDING_EXCEPTION;
5119 return 0;
5120 }
5121
5122 if (result.get_jboolean()) {
5123 continue;
5124 }
5125 }
5126 }
5127 return (not_first_ch) ? old_p : NULL;
5128 }
5129 return (not_first_ch) ? p : NULL;
5130 }
5131
5132 // Take pointer to a string. Skip over the longest part of the string that could
5133 // be taken as a field signature. Allow "void" if void_ok.
5134 // Return a pointer to just past the signature.
5135 // Return NULL if no legal signature is found.
5136 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5137 bool void_ok,
5138 unsigned int length,
5139 TRAPS) const {
5140 unsigned int array_dim = 0;
5141 while (length > 0) {
5142 switch (signature[0]) {
5143 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5144 case JVM_SIGNATURE_BOOLEAN:
5145 case JVM_SIGNATURE_BYTE:
5146 case JVM_SIGNATURE_CHAR:
5147 case JVM_SIGNATURE_SHORT:
5148 case JVM_SIGNATURE_INT:
5149 case JVM_SIGNATURE_FLOAT:
5150 case JVM_SIGNATURE_LONG:
5151 case JVM_SIGNATURE_DOUBLE:
5152 return signature + 1;
5153 case JVM_SIGNATURE_CLASS: {
5154 if (_major_version < JAVA_1_5_VERSION) {
5155 // Skip over the class name if one is there
5156 const char* const p = skip_over_field_name(signature + 1, true, --length);
5157
5158 // The next character better be a semicolon
5159 if (p && (p - signature) > 1 && p[0] == ';') {
5160 return p + 1;
5161 }
5162 }
5163 else {
5164 // Skip leading 'L' and ignore first appearance of ';'
5165 length--;
5166 signature++;
5167 char* c = strchr((char*) signature, ';');
5168 // Format check signature
5169 if (c != NULL) {
5170 ResourceMark rm(THREAD);
5171 int newlen = c - (char*) signature;
5172 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
5173 strncpy(sig, signature, newlen);
5174 sig[newlen] = '\0';
5175
5176 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
5177 if (!legal) {
5178 classfile_parse_error("Class name contains illegal character "
5179 "in descriptor in class file %s",
5180 CHECK_0);
5181 return NULL;
5182 }
5183 return signature + newlen + 1;
5184 }
5185 }
5186 return NULL;
5187 }
5188 case JVM_SIGNATURE_ARRAY:
5189 array_dim++;
5190 if (array_dim > 255) {
5191 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5192 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5193 }
5194 // The rest of what's there better be a legal signature
5195 signature++;
5196 length--;
5197 void_ok = false;
5198 break;
5199 default:
5200 return NULL;
5201 }
5202 }
5203 return NULL;
5204 }
5205
5206 // Checks if name is a legal class name.
5207 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5208 if (!_need_verify || _relax_verify) { return; }
5209
5210 char buf[fixed_buffer_size];
5211 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5212 unsigned int length = name->utf8_length();
5213 bool legal = false;
5214
5215 if (length > 0) {
5216 const char* p;
5217 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5218 p = skip_over_field_signature(bytes, false, length, CHECK);
5219 legal = (p != NULL) && ((p - bytes) == (int)length);
5220 } else if (_major_version < JAVA_1_5_VERSION) {
5221 if (bytes[0] != '<') {
5222 p = skip_over_field_name(bytes, true, length);
5223 legal = (p != NULL) && ((p - bytes) == (int)length);
5224 }
5225 } else {
5226 // 4900761: relax the constraints based on JSR202 spec
5227 // Class names may be drawn from the entire Unicode character set.
5228 // Identifiers between '/' must be unqualified names.
5229 // The utf8 string has been verified when parsing cpool entries.
5230 legal = verify_unqualified_name(bytes, length, LegalClass);
5231 }
5232 }
5233 if (!legal) {
5234 ResourceMark rm(THREAD);
5235 assert(_class_name != NULL, "invariant");
5236 Exceptions::fthrow(
5237 THREAD_AND_LOCATION,
5238 vmSymbols::java_lang_ClassFormatError(),
5239 "Illegal class name \"%s\" in class file %s", bytes,
5240 _class_name->as_C_string()
5241 );
5242 return;
5243 }
5244 }
5245
5246 // Checks if name is a legal field name.
5247 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5248 if (!_need_verify || _relax_verify) { return; }
5249
5250 char buf[fixed_buffer_size];
5251 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5252 unsigned int length = name->utf8_length();
5253 bool legal = false;
5254
5255 if (length > 0) {
5256 if (_major_version < JAVA_1_5_VERSION) {
5257 if (bytes[0] != '<') {
5258 const char* p = skip_over_field_name(bytes, false, length);
5259 legal = (p != NULL) && ((p - bytes) == (int)length);
5260 }
5261 } else {
5262 // 4881221: relax the constraints based on JSR202 spec
5263 legal = verify_unqualified_name(bytes, length, LegalField);
5264 }
5265 }
5266
5267 if (!legal) {
5268 ResourceMark rm(THREAD);
5269 assert(_class_name != NULL, "invariant");
5270 Exceptions::fthrow(
5271 THREAD_AND_LOCATION,
5272 vmSymbols::java_lang_ClassFormatError(),
5273 "Illegal field name \"%s\" in class %s", bytes,
5274 _class_name->as_C_string()
5275 );
5276 return;
5277 }
5278 }
5279
5280 // Checks if name is a legal method name.
5281 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5282 if (!_need_verify || _relax_verify) { return; }
5283
5284 assert(name != NULL, "method name is null");
5285 char buf[fixed_buffer_size];
5286 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5287 unsigned int length = name->utf8_length();
5288 bool legal = false;
5289
5290 if (length > 0) {
5291 if (bytes[0] == '<') {
5292 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5293 legal = true;
5294 }
5295 } else if (_major_version < JAVA_1_5_VERSION) {
5296 const char* p;
5297 p = skip_over_field_name(bytes, false, length);
5298 legal = (p != NULL) && ((p - bytes) == (int)length);
5299 } else {
5300 // 4881221: relax the constraints based on JSR202 spec
5301 legal = verify_unqualified_name(bytes, length, LegalMethod);
5302 }
5303 }
5304
5305 if (!legal) {
5306 ResourceMark rm(THREAD);
5307 assert(_class_name != NULL, "invariant");
5308 Exceptions::fthrow(
5309 THREAD_AND_LOCATION,
5310 vmSymbols::java_lang_ClassFormatError(),
5311 "Illegal method name \"%s\" in class %s", bytes,
5312 _class_name->as_C_string()
5313 );
5314 return;
5315 }
5316 }
5317
5318
5319 // Checks if signature is a legal field signature.
5320 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5321 const Symbol* signature,
5322 TRAPS) const {
5323 if (!_need_verify) { return; }
5324
5325 char buf[fixed_buffer_size];
5326 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5327 const unsigned int length = signature->utf8_length();
5328 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5329
5330 if (p == NULL || (p - bytes) != (int)length) {
5331 throwIllegalSignature("Field", name, signature, CHECK);
5332 }
5333 }
5334
5335 // Checks if signature is a legal method signature.
5336 // Returns number of parameters
5337 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5338 const Symbol* signature,
5339 TRAPS) const {
5340 if (!_need_verify) {
5341 // make sure caller's args_size will be less than 0 even for non-static
5342 // method so it will be recomputed in compute_size_of_parameters().
5343 return -2;
5344 }
5345
5346 // Class initializers cannot have args for class format version >= 51.
5347 if (name == vmSymbols::class_initializer_name() &&
5348 signature != vmSymbols::void_method_signature() &&
5349 _major_version >= JAVA_7_VERSION) {
5350 throwIllegalSignature("Method", name, signature, CHECK_0);
5351 return 0;
5352 }
5353
5354 unsigned int args_size = 0;
5355 char buf[fixed_buffer_size];
5356 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5357 unsigned int length = signature->utf8_length();
5358 const char* nextp;
5359
5360 // The first character must be a '('
5361 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5362 length--;
5363 // Skip over legal field signatures
5364 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5365 while ((length > 0) && (nextp != NULL)) {
5366 args_size++;
5367 if (p[0] == 'J' || p[0] == 'D') {
5368 args_size++;
5369 }
5370 length -= nextp - p;
5371 p = nextp;
5372 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5373 }
5374 // The first non-signature thing better be a ')'
5375 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5376 length--;
5377 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5378 // All internal methods must return void
5379 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5380 return args_size;
5381 }
5382 } else {
5383 // Now we better just have a return value
5384 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5385 if (nextp && ((int)length == (nextp - p))) {
5386 return args_size;
5387 }
5388 }
5389 }
5390 }
5391 // Report error
5392 throwIllegalSignature("Method", name, signature, CHECK_0);
5393 return 0;
5394 }
5395
5396 int ClassFileParser::static_field_size() const {
5397 assert(_field_info != NULL, "invariant");
5398 return _field_info->static_field_size;
5399 }
5400
5401 int ClassFileParser::total_oop_map_count() const {
5402 assert(_field_info != NULL, "invariant");
5403 return _field_info->total_oop_map_count;
5404 }
5405
5406 jint ClassFileParser::layout_size() const {
5407 assert(_field_info != NULL, "invariant");
5408 return _field_info->instance_size;
5409 }
5410
5411 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5412 const Array<Method*>* methods) {
5413 assert(ik != NULL, "invariant");
5414 assert(methods != NULL, "invariant");
5415
5416 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5417 // (We used to do this lazily, but now we query it in Rewriter,
5418 // which is eagerly done for every method, so we might as well do it now,
5419 // when everything is fresh in memory.)
5420 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5421
5422 if (klass_id != vmSymbols::NO_SID) {
5423 for (int j = 0; j < methods->length(); ++j) {
5424 Method* method = methods->at(j);
5425 method->init_intrinsic_id();
5426
5427 if (CheckIntrinsics) {
5428 // Check if an intrinsic is defined for method 'method',
5429 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5430 if (method->intrinsic_id() != vmIntrinsics::_none &&
5431 !method->intrinsic_candidate()) {
5432 tty->print("Compiler intrinsic is defined for method [%s], "
5433 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5434 method->name_and_sig_as_C_string(),
5435 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5436 );
5437 tty->cr();
5438 DEBUG_ONLY(vm_exit(1));
5439 }
5440 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5441 // but there is no intrinsic available for it.
5442 if (method->intrinsic_candidate() &&
5443 method->intrinsic_id() == vmIntrinsics::_none) {
5444 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5445 "but no compiler intrinsic is defined for the method.%s",
5446 method->name_and_sig_as_C_string(),
5447 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5448 );
5449 tty->cr();
5450 DEBUG_ONLY(vm_exit(1));
5451 }
5452 }
5453 } // end for
5454
5455 #ifdef ASSERT
5456 if (CheckIntrinsics) {
5457 // Check for orphan methods in the current class. A method m
5458 // of a class C is orphan if an intrinsic is defined for method m,
5459 // but class C does not declare m.
5460 // The check is potentially expensive, therefore it is available
5461 // only in debug builds.
5462
5463 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5464 if (vmIntrinsics::_compiledLambdaForm == id) {
5465 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5466 // generated for the JVM from a LambdaForm and therefore no method
5467 // is defined for it.
5468 continue;
5469 }
5470
5471 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5472 // Check if the current class contains a method with the same
5473 // name, flags, signature.
5474 bool match = false;
5475 for (int j = 0; j < methods->length(); ++j) {
5476 const Method* method = methods->at(j);
5477 if (method->intrinsic_id() == id) {
5478 match = true;
5479 break;
5480 }
5481 }
5482
5483 if (!match) {
5484 char buf[1000];
5485 tty->print("Compiler intrinsic is defined for method [%s], "
5486 "but the method is not available in class [%s].%s",
5487 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5488 buf, sizeof(buf)),
5489 ik->name()->as_C_string(),
5490 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5491 );
5492 tty->cr();
5493 DEBUG_ONLY(vm_exit(1));
5494 }
5495 }
5496 } // end for
5497 } // CheckIntrinsics
5498 #endif // ASSERT
5499 }
5500 }
5501
5502 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5503 if (_klass != NULL) {
5504 return _klass;
5505 }
5506
5507 InstanceKlass* const ik =
5508 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5509
5510 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5511
5512 assert(_klass == ik, "invariant");
5513
5514 ik->set_has_passed_fingerprint_check(false);
5515 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5516 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5517 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5518 // This class matches with a class saved in an AOT library
5519 ik->set_has_passed_fingerprint_check(true);
5520 } else {
5521 ResourceMark rm;
5522 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5523 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5524 }
5525 }
5526
5527 return ik;
5528 }
5529
5530 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5531 assert(ik != NULL, "invariant");
5532
5533 // Set name and CLD before adding to CLD
5534 ik->set_class_loader_data(_loader_data);
5535 ik->set_name(_class_name);
5536
5537 // Add all classes to our internal class loader list here,
5538 // including classes in the bootstrap (NULL) class loader.
5539 const bool publicize = !is_internal();
5540
5541 _loader_data->add_class(ik, publicize);
5542
5543 set_klass_to_deallocate(ik);
5544
5545 assert(_field_info != NULL, "invariant");
5546 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5547 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5548 "sanity");
5549
5550 assert(ik->is_instance_klass(), "sanity");
5551 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5552
5553 // Fill in information already parsed
5554 ik->set_should_verify_class(_need_verify);
5555
5556 // Not yet: supers are done below to support the new subtype-checking fields
5557 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5558 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5559 assert(_fac != NULL, "invariant");
5560 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5561
5562 // this transfers ownership of a lot of arrays from
5563 // the parser onto the InstanceKlass*
5564 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5565
5566 // note that is not safe to use the fields in the parser from this point on
5567 assert(NULL == _cp, "invariant");
5568 assert(NULL == _fields, "invariant");
5569 assert(NULL == _methods, "invariant");
5570 assert(NULL == _inner_classes, "invariant");
5571 assert(NULL == _nest_members, "invariant");
5572 assert(NULL == _local_interfaces, "invariant");
5573 assert(NULL == _combined_annotations, "invariant");
5574
5575 if (_has_final_method) {
5576 ik->set_has_final_method();
5577 }
5578
5579 ik->copy_method_ordering(_method_ordering, CHECK);
5580 // The InstanceKlass::_methods_jmethod_ids cache
5581 // is managed on the assumption that the initial cache
5582 // size is equal to the number of methods in the class. If
5583 // that changes, then InstanceKlass::idnum_can_increment()
5584 // has to be changed accordingly.
5585 ik->set_initial_method_idnum(ik->methods()->length());
5586
5587 ik->set_this_class_index(_this_class_index);
5588
5589 if (is_anonymous()) {
5590 // _this_class_index is a CONSTANT_Class entry that refers to this
5591 // anonymous class itself. If this class needs to refer to its own methods or
5592 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5593 // _this_class_index. However, because this class is anonymous (it's
5594 // not stored in SystemDictionary), _this_class_index cannot be resolved
5595 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5596 // Therefore, we must eagerly resolve _this_class_index now.
5597 ik->constants()->klass_at_put(_this_class_index, ik);
5598 }
5599
5600 ik->set_minor_version(_minor_version);
5601 ik->set_major_version(_major_version);
5602 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5603 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5604
5605 if (_host_klass != NULL) {
5606 assert (ik->is_anonymous(), "should be the same");
5607 ik->set_host_klass(_host_klass);
5608 }
5609
5610 // Set PackageEntry for this_klass
5611 oop cl = ik->class_loader();
5612 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5613 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5614 ik->set_package(cld, CHECK);
5615
5616 const Array<Method*>* const methods = ik->methods();
5617 assert(methods != NULL, "invariant");
5618 const int methods_len = methods->length();
5619
5620 check_methods_for_intrinsics(ik, methods);
5621
5622 // Fill in field values obtained by parse_classfile_attributes
5623 if (_parsed_annotations->has_any_annotations()) {
5624 _parsed_annotations->apply_to(ik);
5625 }
5626
5627 apply_parsed_class_attributes(ik);
5628
5629 // Miranda methods
5630 if ((_num_miranda_methods > 0) ||
5631 // if this class introduced new miranda methods or
5632 (_super_klass != NULL && _super_klass->has_miranda_methods())
5633 // super class exists and this class inherited miranda methods
5634 ) {
5635 ik->set_has_miranda_methods(); // then set a flag
5636 }
5637
5638 // Fill in information needed to compute superclasses.
5639 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5640 ik->set_transitive_interfaces(_transitive_interfaces);
5641 _transitive_interfaces = NULL;
5642
5643 // Initialize itable offset tables
5644 klassItable::setup_itable_offset_table(ik);
5645
5646 // Compute transitive closure of interfaces this class implements
5647 // Do final class setup
5648 fill_oop_maps(ik,
5649 _field_info->nonstatic_oop_map_count,
5650 _field_info->nonstatic_oop_offsets,
5651 _field_info->nonstatic_oop_counts);
5652
5653 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5654 set_precomputed_flags(ik);
5655
5656 // check if this class can access its super class
5657 check_super_class_access(ik, CHECK);
5658
5659 // check if this class can access its superinterfaces
5660 check_super_interface_access(ik, CHECK);
5661
5662 // check if this class overrides any final method
5663 check_final_method_override(ik, CHECK);
5664
5665 // reject static interface methods prior to Java 8
5666 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5667 check_illegal_static_method(ik, CHECK);
5668 }
5669
5670 // Obtain this_klass' module entry
5671 ModuleEntry* module_entry = ik->module();
5672 assert(module_entry != NULL, "module_entry should always be set");
5673
5674 // Obtain java.lang.Module
5675 Handle module_handle(THREAD, module_entry->module());
5676
5677 // Allocate mirror and initialize static fields
5678 // The create_mirror() call will also call compute_modifiers()
5679 java_lang_Class::create_mirror(ik,
5680 Handle(THREAD, _loader_data->class_loader()),
5681 module_handle,
5682 _protection_domain,
5683 CHECK);
5684
5685 assert(_all_mirandas != NULL, "invariant");
5686
5687 // Generate any default methods - default methods are public interface methods
5688 // that have a default implementation. This is new with Java 8.
5689 if (_has_nonstatic_concrete_methods) {
5690 DefaultMethods::generate_default_methods(ik,
5691 _all_mirandas,
5692 CHECK);
5693 }
5694
5695 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5696 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5697 !module_entry->has_default_read_edges()) {
5698 if (!module_entry->set_has_default_read_edges()) {
5699 // We won a potential race
5700 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5701 }
5702 }
5703
5704 // Update the loader_data graph.
5705 record_defined_class_dependencies(ik, CHECK);
5706
5707 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5708
5709 if (!is_internal()) {
5710 if (log_is_enabled(Info, class, load)) {
5711 ResourceMark rm;
5712 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5713 ik->print_class_load_logging(_loader_data, module_name, _stream);
5714 }
5715
5716 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5717 ik->major_version() != JAVA_MIN_SUPPORTED_VERSION &&
5718 log_is_enabled(Info, class, preview)) {
5719 ResourceMark rm;
5720 log_info(class, preview)("Loading preview feature type %s", ik->external_name());
5721 }
5722
5723 if (log_is_enabled(Debug, class, resolve)) {
5724 ResourceMark rm;
5725 // print out the superclass.
5726 const char * from = ik->external_name();
5727 if (ik->java_super() != NULL) {
5728 log_debug(class, resolve)("%s %s (super)",
5729 from,
5730 ik->java_super()->external_name());
5731 }
5732 // print out each of the interface classes referred to by this class.
5733 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5734 if (local_interfaces != NULL) {
5735 const int length = local_interfaces->length();
5736 for (int i = 0; i < length; i++) {
5737 const Klass* const k = local_interfaces->at(i);
5738 const char * to = k->external_name();
5739 log_debug(class, resolve)("%s %s (interface)", from, to);
5740 }
5741 }
5742 }
5743 }
5744
5745 JFR_ONLY(INIT_ID(ik);)
5746
5747 // If we reach here, all is well.
5748 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5749 // in order for it to not be destroyed in the ClassFileParser destructor.
5750 set_klass_to_deallocate(NULL);
5751
5752 // it's official
5753 set_klass(ik);
5754
5755 debug_only(ik->verify();)
5756 }
5757
5758 // For an anonymous class that is in the unnamed package, move it to its host class's
5759 // package by prepending its host class's package name to its class name and setting
5760 // its _class_name field.
5761 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5762 ResourceMark rm(THREAD);
5763 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5764 "Anonymous class should not be in a package");
5765 const char* host_pkg_name =
5766 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5767
5768 if (host_pkg_name != NULL) {
5769 size_t host_pkg_len = strlen(host_pkg_name);
5770 int class_name_len = _class_name->utf8_length();
5771 char* new_anon_name =
5772 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5773 // Copy host package name and trailing /.
5774 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5775 new_anon_name[host_pkg_len] = '/';
5776 // Append anonymous class name. The anonymous class name can contain odd
5777 // characters. So, do a strncpy instead of using sprintf("%s...").
5778 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5779
5780 // Create a symbol and update the anonymous class name.
5781 _class_name = SymbolTable::new_symbol(new_anon_name,
5782 (int)host_pkg_len + 1 + class_name_len,
5783 CHECK);
5784 }
5785 }
5786
5787 // If the host class and the anonymous class are in the same package then do
5788 // nothing. If the anonymous class is in the unnamed package then move it to its
5789 // host's package. If the classes are in different packages then throw an IAE
5790 // exception.
5791 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5792 assert(_host_klass != NULL, "Expected an anonymous class");
5793
5794 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5795 _class_name->utf8_length(), '/');
5796 if (anon_last_slash == NULL) { // Unnamed package
5797 prepend_host_package_name(_host_klass, CHECK);
5798 } else {
5799 if (!_host_klass->is_same_class_package(_host_klass->class_loader(), _class_name)) {
5800 ResourceMark rm(THREAD);
5801 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5802 err_msg("Host class %s and anonymous class %s are in different packages",
5803 _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5804 }
5805 }
5806 }
5807
5808 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5809 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5810 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5811 bool need_verify =
5812 // verifyAll
5813 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5814 // verifyRemote
5815 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5816 return !need_verify;
5817 }
5818
5819 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5820 Symbol* name,
5821 ClassLoaderData* loader_data,
5822 Handle protection_domain,
5823 const InstanceKlass* host_klass,
5824 GrowableArray<Handle>* cp_patches,
5825 Publicity pub_level,
5826 TRAPS) :
5827 _stream(stream),
5828 _requested_name(name),
5829 _loader_data(loader_data),
5830 _host_klass(host_klass),
5831 _cp_patches(cp_patches),
5832 _num_patched_klasses(0),
5833 _max_num_patched_klasses(0),
5834 _orig_cp_size(0),
5835 _first_patched_klass_resolved_index(0),
5836 _super_klass(),
5837 _cp(NULL),
5838 _fields(NULL),
5839 _methods(NULL),
5840 _inner_classes(NULL),
5841 _nest_members(NULL),
5842 _nest_host(0),
5843 _local_interfaces(NULL),
5844 _transitive_interfaces(NULL),
5845 _combined_annotations(NULL),
5846 _annotations(NULL),
5847 _type_annotations(NULL),
5848 _fields_annotations(NULL),
5849 _fields_type_annotations(NULL),
5850 _klass(NULL),
5851 _klass_to_deallocate(NULL),
5852 _parsed_annotations(NULL),
5853 _fac(NULL),
5854 _field_info(NULL),
5855 _method_ordering(NULL),
5856 _all_mirandas(NULL),
5857 _vtable_size(0),
5858 _itable_size(0),
5859 _num_miranda_methods(0),
5860 _rt(REF_NONE),
5861 _protection_domain(protection_domain),
5862 _access_flags(),
5863 _pub_level(pub_level),
5864 _bad_constant_seen(0),
5865 _synthetic_flag(false),
5866 _sde_length(false),
5867 _sde_buffer(NULL),
5868 _sourcefile_index(0),
5869 _generic_signature_index(0),
5870 _major_version(0),
5871 _minor_version(0),
5872 _this_class_index(0),
5873 _super_class_index(0),
5874 _itfs_len(0),
5875 _java_fields_count(0),
5876 _need_verify(false),
5877 _relax_verify(false),
5878 _has_nonstatic_concrete_methods(false),
5879 _declares_nonstatic_concrete_methods(false),
5880 _has_final_method(false),
5881 _has_finalizer(false),
5882 _has_empty_finalizer(false),
5883 _has_vanilla_constructor(false),
5884 _max_bootstrap_specifier_index(-1) {
5885
5886 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5887
5888 assert(THREAD->is_Java_thread(), "invariant");
5889 assert(_loader_data != NULL, "invariant");
5890 assert(stream != NULL, "invariant");
5891 assert(_stream != NULL, "invariant");
5892 assert(_stream->buffer() == _stream->current(), "invariant");
5893 assert(_class_name != NULL, "invariant");
5894 assert(0 == _access_flags.as_int(), "invariant");
5895
5896 // Figure out whether we can skip format checking (matching classic VM behavior)
5897 if (DumpSharedSpaces) {
5898 // verify == true means it's a 'remote' class (i.e., non-boot class)
5899 // Verification decision is based on BytecodeVerificationRemote flag
5900 // for those classes.
5901 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5902 BytecodeVerificationLocal;
5903 }
5904 else {
5905 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5906 stream->need_verify());
5907 }
5908 if (_cp_patches != NULL) {
5909 int len = _cp_patches->length();
5910 for (int i=0; i<len; i++) {
5911 if (has_cp_patch_at(i)) {
5912 Handle patch = cp_patch_at(i);
5913 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5914 // We need to append the names of the patched classes to the end of the constant pool,
5915 // because a patched class may have a Utf8 name that's not already included in the
5916 // original constant pool. These class names are used when patch_constant_pool()
5917 // calls patch_class().
5918 //
5919 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5920 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5921 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5922 _max_num_patched_klasses++;
5923 }
5924 }
5925 }
5926 }
5927
5928 // synch back verification state to stream
5929 stream->set_verify(_need_verify);
5930
5931 // Check if verification needs to be relaxed for this class file
5932 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5933 _relax_verify = relax_format_check_for(_loader_data);
5934
5935 parse_stream(stream, CHECK);
5936
5937 post_process_parsed_stream(stream, _cp, CHECK);
5938 }
5939
5940 void ClassFileParser::clear_class_metadata() {
5941 // metadata created before the instance klass is created. Must be
5942 // deallocated if classfile parsing returns an error.
5943 _cp = NULL;
5944 _fields = NULL;
5945 _methods = NULL;
5946 _inner_classes = NULL;
5947 _nest_members = NULL;
5948 _local_interfaces = NULL;
5949 _combined_annotations = NULL;
5950 _annotations = _type_annotations = NULL;
5951 _fields_annotations = _fields_type_annotations = NULL;
5952 }
5953
5954 // Destructor to clean up
5955 ClassFileParser::~ClassFileParser() {
5956 if (_cp != NULL) {
5957 MetadataFactory::free_metadata(_loader_data, _cp);
5958 }
5959 if (_fields != NULL) {
5960 MetadataFactory::free_array<u2>(_loader_data, _fields);
5961 }
5962
5963 if (_methods != NULL) {
5964 // Free methods
5965 InstanceKlass::deallocate_methods(_loader_data, _methods);
5966 }
5967
5968 // beware of the Universe::empty_blah_array!!
5969 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5970 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5971 }
5972
5973 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
5974 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5975 }
5976
5977 // Free interfaces
5978 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5979 _local_interfaces, _transitive_interfaces);
5980
5981 if (_combined_annotations != NULL) {
5982 // After all annotations arrays have been created, they are installed into the
5983 // Annotations object that will be assigned to the InstanceKlass being created.
5984
5985 // Deallocate the Annotations object and the installed annotations arrays.
5986 _combined_annotations->deallocate_contents(_loader_data);
5987
5988 // If the _combined_annotations pointer is non-NULL,
5989 // then the other annotations fields should have been cleared.
5990 assert(_annotations == NULL, "Should have been cleared");
5991 assert(_type_annotations == NULL, "Should have been cleared");
5992 assert(_fields_annotations == NULL, "Should have been cleared");
5993 assert(_fields_type_annotations == NULL, "Should have been cleared");
5994 } else {
5995 // If the annotations arrays were not installed into the Annotations object,
5996 // then they have to be deallocated explicitly.
5997 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5998 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5999 Annotations::free_contents(_loader_data, _fields_annotations);
6000 Annotations::free_contents(_loader_data, _fields_type_annotations);
6001 }
6002
6003 clear_class_metadata();
6004 _transitive_interfaces = NULL;
6005
6006 // deallocate the klass if already created. Don't directly deallocate, but add
6007 // to the deallocate list so that the klass is removed from the CLD::_klasses list
6008 // at a safepoint.
6009 if (_klass_to_deallocate != NULL) {
6010 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6011 }
6012 }
6013
6014 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6015 TRAPS) {
6016
6017 assert(stream != NULL, "invariant");
6018 assert(_class_name != NULL, "invariant");
6019
6020 // BEGIN STREAM PARSING
6021 stream->guarantee_more(8, CHECK); // magic, major, minor
6022 // Magic value
6023 const u4 magic = stream->get_u4_fast();
6024 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6025 "Incompatible magic value %u in class file %s",
6026 magic, CHECK);
6027
6028 // Version numbers
6029 _minor_version = stream->get_u2_fast();
6030 _major_version = stream->get_u2_fast();
6031
6032 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
6033 ResourceMark rm;
6034 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
6035 _major_version, _minor_version, _class_name->as_C_string());
6036 Exceptions::fthrow(
6037 THREAD_AND_LOCATION,
6038 vmSymbols::java_lang_UnsupportedClassVersionError(),
6039 "Unsupported major.minor version for dump time %u.%u",
6040 _major_version,
6041 _minor_version);
6042 }
6043
6044 // Check version numbers - we check this even with verifier off
6045 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
6046
6047 stream->guarantee_more(3, CHECK); // length, first cp tag
6048 u2 cp_size = stream->get_u2_fast();
6049
6050 guarantee_property(
6051 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6052 cp_size, CHECK);
6053
6054 _orig_cp_size = cp_size;
6055 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6056 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6057 }
6058 cp_size += _max_num_patched_klasses;
6059
6060 _cp = ConstantPool::allocate(_loader_data,
6061 cp_size,
6062 CHECK);
6063
6064 ConstantPool* const cp = _cp;
6065
6066 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6067
6068 assert(cp_size == (const u2)cp->length(), "invariant");
6069
6070 // ACCESS FLAGS
6071 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6072
6073 // Access flags
6074 jint flags;
6075 // JVM_ACC_MODULE is defined in JDK-9 and later.
6076 if (_major_version >= JAVA_9_VERSION) {
6077 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
6078 } else {
6079 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
6080 }
6081
6082 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6083 // Set abstract bit for old class files for backward compatibility
6084 flags |= JVM_ACC_ABSTRACT;
6085 }
6086
6087 verify_legal_class_modifiers(flags, CHECK);
6088
6089 short bad_constant = class_bad_constant_seen();
6090 if (bad_constant != 0) {
6091 // Do not throw CFE until after the access_flags are checked because if
6092 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6093 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6094 }
6095
6096 _access_flags.set_flags(flags);
6097
6098 // This class and superclass
6099 _this_class_index = stream->get_u2_fast();
6100 check_property(
6101 valid_cp_range(_this_class_index, cp_size) &&
6102 cp->tag_at(_this_class_index).is_unresolved_klass(),
6103 "Invalid this class index %u in constant pool in class file %s",
6104 _this_class_index, CHECK);
6105
6106 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6107 assert(class_name_in_cp != NULL, "class_name can't be null");
6108
6109 // Update _class_name which could be null previously
6110 // to reflect the name in the constant pool
6111 _class_name = class_name_in_cp;
6112
6113 // Don't need to check whether this class name is legal or not.
6114 // It has been checked when constant pool is parsed.
6115 // However, make sure it is not an array type.
6116 if (_need_verify) {
6117 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
6118 "Bad class name in class file %s",
6119 CHECK);
6120 }
6121
6122 // Checks if name in class file matches requested name
6123 if (_requested_name != NULL && _requested_name != _class_name) {
6124 ResourceMark rm(THREAD);
6125 Exceptions::fthrow(
6126 THREAD_AND_LOCATION,
6127 vmSymbols::java_lang_NoClassDefFoundError(),
6128 "%s (wrong name: %s)",
6129 _class_name->as_C_string(),
6130 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6131 );
6132 return;
6133 }
6134
6135 // if this is an anonymous class fix up its name if it's in the unnamed
6136 // package. Otherwise, throw IAE if it is in a different package than
6137 // its host class.
6138 if (_host_klass != NULL) {
6139 fix_anonymous_class_name(CHECK);
6140 }
6141
6142 // Verification prevents us from creating names with dots in them, this
6143 // asserts that that's the case.
6144 assert(is_internal_format(_class_name), "external class name format used internally");
6145
6146 if (!is_internal()) {
6147 LogTarget(Debug, class, preorder) lt;
6148 if (lt.is_enabled()){
6149 ResourceMark rm(THREAD);
6150 LogStream ls(lt);
6151 ls.print("%s", _class_name->as_klass_external_name());
6152 if (stream->source() != NULL) {
6153 ls.print(" source: %s", stream->source());
6154 }
6155 ls.cr();
6156 }
6157
6158 #if INCLUDE_CDS
6159 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6160 if (!ClassLoader::has_jrt_entry()) {
6161 warning("DumpLoadedClassList and CDS are not supported in exploded build");
6162 DumpLoadedClassList = NULL;
6163 } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6164 _host_klass == NULL) {
6165 // Only dump the classes that can be stored into CDS archive.
6166 // Anonymous classes such as generated LambdaForm classes are also not included.
6167 oop class_loader = _loader_data->class_loader();
6168 ResourceMark rm(THREAD);
6169 bool skip = false;
6170 if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6171 // For the boot and platform class loaders, skip classes that are not found in the
6172 // java runtime image, such as those found in the --patch-module entries.
6173 // These classes can't be loaded from the archive during runtime.
6174 if (!ClassLoader::is_modules_image(stream->source()) && strncmp(stream->source(), "jrt:", 4) != 0) {
6175 skip = true;
6176 }
6177
6178 if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6179 // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6180 // as they can be loaded from the archive during runtime.
6181 skip = false;
6182 }
6183 }
6184 if (skip) {
6185 tty->print_cr("skip writing class %s from source %s to classlist file",
6186 _class_name->as_C_string(), stream->source());
6187 } else {
6188 classlist_file->print_cr("%s", _class_name->as_C_string());
6189 classlist_file->flush();
6190 }
6191 }
6192 }
6193 #endif
6194 }
6195
6196 // SUPERKLASS
6197 _super_class_index = stream->get_u2_fast();
6198 _super_klass = parse_super_class(cp,
6199 _super_class_index,
6200 _need_verify,
6201 CHECK);
6202
6203 // Interfaces
6204 _itfs_len = stream->get_u2_fast();
6205 parse_interfaces(stream,
6206 _itfs_len,
6207 cp,
6208 &_has_nonstatic_concrete_methods,
6209 CHECK);
6210
6211 assert(_local_interfaces != NULL, "invariant");
6212
6213 // Fields (offsets are filled in later)
6214 _fac = new FieldAllocationCount();
6215 parse_fields(stream,
6216 _access_flags.is_interface(),
6217 _fac,
6218 cp,
6219 cp_size,
6220 &_java_fields_count,
6221 CHECK);
6222
6223 assert(_fields != NULL, "invariant");
6224
6225 // Methods
6226 AccessFlags promoted_flags;
6227 parse_methods(stream,
6228 _access_flags.is_interface(),
6229 &promoted_flags,
6230 &_has_final_method,
6231 &_declares_nonstatic_concrete_methods,
6232 CHECK);
6233
6234 assert(_methods != NULL, "invariant");
6235
6236 // promote flags from parse_methods() to the klass' flags
6237 _access_flags.add_promoted_flags(promoted_flags.as_int());
6238
6239 if (_declares_nonstatic_concrete_methods) {
6240 _has_nonstatic_concrete_methods = true;
6241 }
6242
6243 // Additional attributes/annotations
6244 _parsed_annotations = new ClassAnnotationCollector();
6245 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6246
6247 assert(_inner_classes != NULL, "invariant");
6248
6249 // Finalize the Annotations metadata object,
6250 // now that all annotation arrays have been created.
6251 create_combined_annotations(CHECK);
6252
6253 // Make sure this is the end of class file stream
6254 guarantee_property(stream->at_eos(),
6255 "Extra bytes at the end of class file %s",
6256 CHECK);
6257
6258 // all bytes in stream read and parsed
6259 }
6260
6261 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6262 ConstantPool* cp,
6263 TRAPS) {
6264 assert(stream != NULL, "invariant");
6265 assert(stream->at_eos(), "invariant");
6266 assert(cp != NULL, "invariant");
6267 assert(_loader_data != NULL, "invariant");
6268
6269 if (_class_name == vmSymbols::java_lang_Object()) {
6270 check_property(_local_interfaces == Universe::the_empty_klass_array(),
6271 "java.lang.Object cannot implement an interface in class file %s",
6272 CHECK);
6273 }
6274 // We check super class after class file is parsed and format is checked
6275 if (_super_class_index > 0 && NULL ==_super_klass) {
6276 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6277 if (_access_flags.is_interface()) {
6278 // Before attempting to resolve the superclass, check for class format
6279 // errors not checked yet.
6280 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6281 "Interfaces must have java.lang.Object as superclass in class file %s",
6282 CHECK);
6283 }
6284 Handle loader(THREAD, _loader_data->class_loader());
6285 _super_klass = (const InstanceKlass*)
6286 SystemDictionary::resolve_super_or_fail(_class_name,
6287 super_class_name,
6288 loader,
6289 _protection_domain,
6290 true,
6291 CHECK);
6292 }
6293
6294 if (_super_klass != NULL) {
6295 if (_super_klass->has_nonstatic_concrete_methods()) {
6296 _has_nonstatic_concrete_methods = true;
6297 }
6298
6299 if (_super_klass->is_interface()) {
6300 ResourceMark rm(THREAD);
6301 Exceptions::fthrow(
6302 THREAD_AND_LOCATION,
6303 vmSymbols::java_lang_IncompatibleClassChangeError(),
6304 "class %s has interface %s as super class",
6305 _class_name->as_klass_external_name(),
6306 _super_klass->external_name()
6307 );
6308 return;
6309 }
6310 // Make sure super class is not final
6311 if (_super_klass->is_final()) {
6312 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6313 }
6314 }
6315
6316 // Compute the transitive list of all unique interfaces implemented by this class
6317 _transitive_interfaces =
6318 compute_transitive_interfaces(_super_klass,
6319 _local_interfaces,
6320 _loader_data,
6321 CHECK);
6322
6323 assert(_transitive_interfaces != NULL, "invariant");
6324
6325 // sort methods
6326 _method_ordering = sort_methods(_methods);
6327
6328 _all_mirandas = new GrowableArray<Method*>(20);
6329
6330 Handle loader(THREAD, _loader_data->class_loader());
6331 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6332 &_num_miranda_methods,
6333 _all_mirandas,
6334 _super_klass,
6335 _methods,
6336 _access_flags,
6337 _major_version,
6338 loader,
6339 _class_name,
6340 _local_interfaces,
6341 CHECK);
6342
6343 // Size of Java itable (in words)
6344 _itable_size = _access_flags.is_interface() ? 0 :
6345 klassItable::compute_itable_size(_transitive_interfaces);
6346
6347 assert(_fac != NULL, "invariant");
6348 assert(_parsed_annotations != NULL, "invariant");
6349
6350 _field_info = new FieldLayoutInfo();
6351 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6352
6353 // Compute reference typ
6354 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6355
6356 }
6357
6358 void ClassFileParser::set_klass(InstanceKlass* klass) {
6359
6360 #ifdef ASSERT
6361 if (klass != NULL) {
6362 assert(NULL == _klass, "leaking?");
6363 }
6364 #endif
6365
6366 _klass = klass;
6367 }
6368
6369 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6370
6371 #ifdef ASSERT
6372 if (klass != NULL) {
6373 assert(NULL == _klass_to_deallocate, "leaking?");
6374 }
6375 #endif
6376
6377 _klass_to_deallocate = klass;
6378 }
6379
6380 // Caller responsible for ResourceMark
6381 // clone stream with rewound position
6382 const ClassFileStream* ClassFileParser::clone_stream() const {
6383 assert(_stream != NULL, "invariant");
6384
6385 return _stream->clone();
6386 }
6387 // ----------------------------------------------------------------------------
6388 // debugging
6389
6390 #ifdef ASSERT
6391
6392 // return true if class_name contains no '.' (internal format is '/')
6393 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6394 if (class_name != NULL) {
6395 ResourceMark rm;
6396 char* name = class_name->as_C_string();
6397 return strchr(name, '.') == NULL;
6398 } else {
6399 return true;
6400 }
6401 }
6402
6403 #endif