1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24 #include "precompiled.hpp"
25 #include "jvm.h"
26 #include "aot/aotLoader.hpp"
27 #include "classfile/classFileParser.hpp"
28 #include "classfile/classFileStream.hpp"
29 #include "classfile/classLoader.hpp"
30 #include "classfile/classLoaderData.inline.hpp"
31 #include "classfile/defaultMethods.hpp"
32 #include "classfile/dictionary.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/moduleEntry.hpp"
35 #include "classfile/packageEntry.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/verificationType.hpp"
39 #include "classfile/verifier.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "logging/log.hpp"
42 #include "logging/logStream.hpp"
43 #include "memory/allocation.hpp"
44 #include "memory/metadataFactory.hpp"
45 #include "memory/oopFactory.hpp"
46 #include "memory/resourceArea.hpp"
47 #include "memory/universe.hpp"
48 #include "oops/annotations.hpp"
49 #include "oops/constantPool.inline.hpp"
50 #include "oops/fieldStreams.hpp"
51 #include "oops/instanceKlass.hpp"
52 #include "oops/instanceMirrorKlass.hpp"
53 #include "oops/klass.inline.hpp"
54 #include "oops/klassVtable.hpp"
55 #include "oops/metadata.hpp"
56 #include "oops/method.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/symbol.hpp"
59 #include "prims/jvmtiExport.hpp"
60 #include "prims/jvmtiThreadState.hpp"
61 #include "runtime/arguments.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/javaCalls.hpp"
64 #include "runtime/os.hpp"
65 #include "runtime/perfData.hpp"
66 #include "runtime/reflection.hpp"
67 #include "runtime/safepointVerifiers.hpp"
68 #include "runtime/signature.hpp"
69 #include "runtime/timer.hpp"
70 #include "services/classLoadingService.hpp"
71 #include "services/threadService.hpp"
72 #include "utilities/align.hpp"
73 #include "utilities/bitMap.inline.hpp"
74 #include "utilities/copy.hpp"
75 #include "utilities/exceptions.hpp"
76 #include "utilities/globalDefinitions.hpp"
77 #include "utilities/growableArray.hpp"
78 #include "utilities/macros.hpp"
79 #include "utilities/ostream.hpp"
80 #include "utilities/resourceHash.hpp"
81 #include "utilities/utf8.hpp"
82
83 #if INCLUDE_CDS
84 #include "classfile/systemDictionaryShared.hpp"
85 #endif
86 #if INCLUDE_JFR
87 #include "jfr/support/jfrTraceIdExtension.hpp"
88 #endif
89
90 // We generally try to create the oops directly when parsing, rather than
91 // allocating temporary data structures and copying the bytes twice. A
92 // temporary area is only needed when parsing utf8 entries in the constant
93 // pool and when parsing line number tables.
94
95 // We add assert in debug mode when class format is not checked.
96
97 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
98 #define JAVA_MIN_SUPPORTED_VERSION 45
99 #define JAVA_PREVIEW_MINOR_VERSION 65535
100
101 // Used for two backward compatibility reasons:
102 // - to check for new additions to the class file format in JDK1.5
103 // - to check for bug fixes in the format checker in JDK1.5
104 #define JAVA_1_5_VERSION 49
105
106 // Used for backward compatibility reasons:
107 // - to check for javac bug fixes that happened after 1.5
108 // - also used as the max version when running in jdk6
109 #define JAVA_6_VERSION 50
110
111 // Used for backward compatibility reasons:
112 // - to disallow argument and require ACC_STATIC for <clinit> methods
113 #define JAVA_7_VERSION 51
114
115 // Extension method support.
116 #define JAVA_8_VERSION 52
117
118 #define JAVA_9_VERSION 53
119
120 #define JAVA_10_VERSION 54
121
122 #define JAVA_11_VERSION 55
123
124 #define JAVA_12_VERSION 56
125
126 #define JAVA_13_VERSION 57
127
128 #define JAVA_14_VERSION 58
129
130 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
131 assert((bad_constant == JVM_CONSTANT_Module ||
132 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
133 "Unexpected bad constant pool entry");
134 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
135 }
136
137 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
138 ConstantPool* cp,
139 const int length,
140 TRAPS) {
141 assert(stream != NULL, "invariant");
142 assert(cp != NULL, "invariant");
143
144 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
145 // this function (_current can be allocated in a register, with scalar
146 // replacement of aggregates). The _current pointer is copied back to
147 // stream() when this function returns. DON'T call another method within
148 // this method that uses stream().
149 const ClassFileStream cfs1 = *stream;
150 const ClassFileStream* const cfs = &cfs1;
151
152 assert(cfs->allocated_on_stack(), "should be local");
153 debug_only(const u1* const old_current = stream->current();)
154
155 // Used for batching symbol allocations.
156 const char* names[SymbolTable::symbol_alloc_batch_size];
157 int lengths[SymbolTable::symbol_alloc_batch_size];
158 int indices[SymbolTable::symbol_alloc_batch_size];
159 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
160 int names_count = 0;
161
162 // parsing Index 0 is unused
163 for (int index = 1; index < length; index++) {
164 // Each of the following case guarantees one more byte in the stream
165 // for the following tag or the access_flags following constant pool,
166 // so we don't need bounds-check for reading tag.
167 const u1 tag = cfs->get_u1_fast();
168 switch (tag) {
169 case JVM_CONSTANT_Class : {
170 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
171 const u2 name_index = cfs->get_u2_fast();
172 cp->klass_index_at_put(index, name_index);
173 break;
174 }
175 case JVM_CONSTANT_Fieldref: {
176 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
177 const u2 class_index = cfs->get_u2_fast();
178 const u2 name_and_type_index = cfs->get_u2_fast();
179 cp->field_at_put(index, class_index, name_and_type_index);
180 break;
181 }
182 case JVM_CONSTANT_Methodref: {
183 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
184 const u2 class_index = cfs->get_u2_fast();
185 const u2 name_and_type_index = cfs->get_u2_fast();
186 cp->method_at_put(index, class_index, name_and_type_index);
187 break;
188 }
189 case JVM_CONSTANT_InterfaceMethodref: {
190 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
191 const u2 class_index = cfs->get_u2_fast();
192 const u2 name_and_type_index = cfs->get_u2_fast();
193 cp->interface_method_at_put(index, class_index, name_and_type_index);
194 break;
195 }
196 case JVM_CONSTANT_String : {
197 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
198 const u2 string_index = cfs->get_u2_fast();
199 cp->string_index_at_put(index, string_index);
200 break;
201 }
202 case JVM_CONSTANT_MethodHandle :
203 case JVM_CONSTANT_MethodType: {
204 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
205 classfile_parse_error(
206 "Class file version does not support constant tag %u in class file %s",
207 tag, CHECK);
208 }
209 if (tag == JVM_CONSTANT_MethodHandle) {
210 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
211 const u1 ref_kind = cfs->get_u1_fast();
212 const u2 method_index = cfs->get_u2_fast();
213 cp->method_handle_index_at_put(index, ref_kind, method_index);
214 }
215 else if (tag == JVM_CONSTANT_MethodType) {
216 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
217 const u2 signature_index = cfs->get_u2_fast();
218 cp->method_type_index_at_put(index, signature_index);
219 }
220 else {
221 ShouldNotReachHere();
222 }
223 break;
224 }
225 case JVM_CONSTANT_Dynamic : {
226 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
227 classfile_parse_error(
228 "Class file version does not support constant tag %u in class file %s",
229 tag, CHECK);
230 }
231 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
232 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
233 const u2 name_and_type_index = cfs->get_u2_fast();
234 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
235 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
236 }
237 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
238 break;
239 }
240 case JVM_CONSTANT_InvokeDynamic : {
241 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
242 classfile_parse_error(
243 "Class file version does not support constant tag %u in class file %s",
244 tag, CHECK);
245 }
246 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
247 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
248 const u2 name_and_type_index = cfs->get_u2_fast();
249 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
250 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
251 }
252 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
253 break;
254 }
255 case JVM_CONSTANT_Integer: {
256 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
257 const u4 bytes = cfs->get_u4_fast();
258 cp->int_at_put(index, (jint)bytes);
259 break;
260 }
261 case JVM_CONSTANT_Float: {
262 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
263 const u4 bytes = cfs->get_u4_fast();
264 cp->float_at_put(index, *(jfloat*)&bytes);
265 break;
266 }
267 case JVM_CONSTANT_Long: {
268 // A mangled type might cause you to overrun allocated memory
269 guarantee_property(index + 1 < length,
270 "Invalid constant pool entry %u in class file %s",
271 index,
272 CHECK);
273 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
274 const u8 bytes = cfs->get_u8_fast();
275 cp->long_at_put(index, bytes);
276 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
277 break;
278 }
279 case JVM_CONSTANT_Double: {
280 // A mangled type might cause you to overrun allocated memory
281 guarantee_property(index+1 < length,
282 "Invalid constant pool entry %u in class file %s",
283 index,
284 CHECK);
285 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
286 const u8 bytes = cfs->get_u8_fast();
287 cp->double_at_put(index, *(jdouble*)&bytes);
288 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
289 break;
290 }
291 case JVM_CONSTANT_NameAndType: {
292 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
293 const u2 name_index = cfs->get_u2_fast();
294 const u2 signature_index = cfs->get_u2_fast();
295 cp->name_and_type_at_put(index, name_index, signature_index);
296 break;
297 }
298 case JVM_CONSTANT_Utf8 : {
299 cfs->guarantee_more(2, CHECK); // utf8_length
300 u2 utf8_length = cfs->get_u2_fast();
301 const u1* utf8_buffer = cfs->current();
302 assert(utf8_buffer != NULL, "null utf8 buffer");
303 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
304 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
305 cfs->skip_u1_fast(utf8_length);
306
307 // Before storing the symbol, make sure it's legal
308 if (_need_verify) {
309 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
310 }
311
312 if (has_cp_patch_at(index)) {
313 Handle patch = clear_cp_patch_at(index);
314 guarantee_property(java_lang_String::is_instance(patch()),
315 "Illegal utf8 patch at %d in class file %s",
316 index,
317 CHECK);
318 const char* const str = java_lang_String::as_utf8_string(patch());
319 // (could use java_lang_String::as_symbol instead, but might as well batch them)
320 utf8_buffer = (const u1*) str;
321 utf8_length = (u2) strlen(str);
322 }
323
324 unsigned int hash;
325 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
326 utf8_length,
327 hash);
328 if (result == NULL) {
329 names[names_count] = (const char*)utf8_buffer;
330 lengths[names_count] = utf8_length;
331 indices[names_count] = index;
332 hashValues[names_count++] = hash;
333 if (names_count == SymbolTable::symbol_alloc_batch_size) {
334 SymbolTable::new_symbols(_loader_data,
335 cp,
336 names_count,
337 names,
338 lengths,
339 indices,
340 hashValues);
341 names_count = 0;
342 }
343 } else {
344 cp->symbol_at_put(index, result);
345 }
346 break;
347 }
348 case JVM_CONSTANT_Module:
349 case JVM_CONSTANT_Package: {
350 // Record that an error occurred in these two cases but keep parsing so
351 // that ACC_Module can be checked for in the access_flags. Need to
352 // throw NoClassDefFoundError in that case.
353 if (_major_version >= JAVA_9_VERSION) {
354 cfs->guarantee_more(3, CHECK);
355 cfs->get_u2_fast();
356 set_class_bad_constant_seen(tag);
357 break;
358 }
359 }
360 default: {
361 classfile_parse_error("Unknown constant tag %u in class file %s",
362 tag,
363 CHECK);
364 break;
365 }
366 } // end of switch(tag)
367 } // end of for
368
369 // Allocate the remaining symbols
370 if (names_count > 0) {
371 SymbolTable::new_symbols(_loader_data,
372 cp,
373 names_count,
374 names,
375 lengths,
376 indices,
377 hashValues);
378 }
379
380 // Copy _current pointer of local copy back to stream.
381 assert(stream->current() == old_current, "non-exclusive use of stream");
382 stream->set_current(cfs1.current());
383
384 }
385
386 static inline bool valid_cp_range(int index, int length) {
387 return (index > 0 && index < length);
388 }
389
390 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
391 assert(cp != NULL, "invariant");
392 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
393 return cp->symbol_at(index);
394 }
395 return NULL;
396 }
397
398 #ifdef ASSERT
399 PRAGMA_DIAG_PUSH
400 PRAGMA_FORMAT_NONLITERAL_IGNORED
401 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
402 ResourceMark rm(THREAD);
403 fatal(msg, _class_name->as_C_string());
404 }
405
406 void ClassFileParser::report_assert_property_failure(const char* msg,
407 int index,
408 TRAPS) const {
409 ResourceMark rm(THREAD);
410 fatal(msg, index, _class_name->as_C_string());
411 }
412 PRAGMA_DIAG_POP
413 #endif
414
415 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
416 ConstantPool* const cp,
417 const int length,
418 TRAPS) {
419 assert(cp != NULL, "invariant");
420 assert(stream != NULL, "invariant");
421
422 // parsing constant pool entries
423 parse_constant_pool_entries(stream, cp, length, CHECK);
424 if (class_bad_constant_seen() != 0) {
425 // a bad CP entry has been detected previously so stop parsing and just return.
426 return;
427 }
428
429 int index = 1; // declared outside of loops for portability
430 int num_klasses = 0;
431
432 // first verification pass - validate cross references
433 // and fixup class and string constants
434 for (index = 1; index < length; index++) { // Index 0 is unused
435 const jbyte tag = cp->tag_at(index).value();
436 switch (tag) {
437 case JVM_CONSTANT_Class: {
438 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
439 break;
440 }
441 case JVM_CONSTANT_Fieldref:
442 // fall through
443 case JVM_CONSTANT_Methodref:
444 // fall through
445 case JVM_CONSTANT_InterfaceMethodref: {
446 if (!_need_verify) break;
447 const int klass_ref_index = cp->klass_ref_index_at(index);
448 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
449 check_property(valid_klass_reference_at(klass_ref_index),
450 "Invalid constant pool index %u in class file %s",
451 klass_ref_index, CHECK);
452 check_property(valid_cp_range(name_and_type_ref_index, length) &&
453 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
454 "Invalid constant pool index %u in class file %s",
455 name_and_type_ref_index, CHECK);
456 break;
457 }
458 case JVM_CONSTANT_String: {
459 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
460 break;
461 }
462 case JVM_CONSTANT_Integer:
463 break;
464 case JVM_CONSTANT_Float:
465 break;
466 case JVM_CONSTANT_Long:
467 case JVM_CONSTANT_Double: {
468 index++;
469 check_property(
470 (index < length && cp->tag_at(index).is_invalid()),
471 "Improper constant pool long/double index %u in class file %s",
472 index, CHECK);
473 break;
474 }
475 case JVM_CONSTANT_NameAndType: {
476 if (!_need_verify) break;
477 const int name_ref_index = cp->name_ref_index_at(index);
478 const int signature_ref_index = cp->signature_ref_index_at(index);
479 check_property(valid_symbol_at(name_ref_index),
480 "Invalid constant pool index %u in class file %s",
481 name_ref_index, CHECK);
482 check_property(valid_symbol_at(signature_ref_index),
483 "Invalid constant pool index %u in class file %s",
484 signature_ref_index, CHECK);
485 break;
486 }
487 case JVM_CONSTANT_Utf8:
488 break;
489 case JVM_CONSTANT_UnresolvedClass: // fall-through
490 case JVM_CONSTANT_UnresolvedClassInError: {
491 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
492 break;
493 }
494 case JVM_CONSTANT_ClassIndex: {
495 const int class_index = cp->klass_index_at(index);
496 check_property(valid_symbol_at(class_index),
497 "Invalid constant pool index %u in class file %s",
498 class_index, CHECK);
499 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
500 break;
501 }
502 case JVM_CONSTANT_StringIndex: {
503 const int string_index = cp->string_index_at(index);
504 check_property(valid_symbol_at(string_index),
505 "Invalid constant pool index %u in class file %s",
506 string_index, CHECK);
507 Symbol* const sym = cp->symbol_at(string_index);
508 cp->unresolved_string_at_put(index, sym);
509 break;
510 }
511 case JVM_CONSTANT_MethodHandle: {
512 const int ref_index = cp->method_handle_index_at(index);
513 check_property(valid_cp_range(ref_index, length),
514 "Invalid constant pool index %u in class file %s",
515 ref_index, CHECK);
516 const constantTag tag = cp->tag_at(ref_index);
517 const int ref_kind = cp->method_handle_ref_kind_at(index);
518
519 switch (ref_kind) {
520 case JVM_REF_getField:
521 case JVM_REF_getStatic:
522 case JVM_REF_putField:
523 case JVM_REF_putStatic: {
524 check_property(
525 tag.is_field(),
526 "Invalid constant pool index %u in class file %s (not a field)",
527 ref_index, CHECK);
528 break;
529 }
530 case JVM_REF_invokeVirtual:
531 case JVM_REF_newInvokeSpecial: {
532 check_property(
533 tag.is_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_invokeStatic:
539 case JVM_REF_invokeSpecial: {
540 check_property(
541 tag.is_method() ||
542 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
543 "Invalid constant pool index %u in class file %s (not a method)",
544 ref_index, CHECK);
545 break;
546 }
547 case JVM_REF_invokeInterface: {
548 check_property(
549 tag.is_interface_method(),
550 "Invalid constant pool index %u in class file %s (not an interface method)",
551 ref_index, CHECK);
552 break;
553 }
554 default: {
555 classfile_parse_error(
556 "Bad method handle kind at constant pool index %u in class file %s",
557 index, CHECK);
558 }
559 } // switch(refkind)
560 // Keep the ref_index unchanged. It will be indirected at link-time.
561 break;
562 } // case MethodHandle
563 case JVM_CONSTANT_MethodType: {
564 const int ref_index = cp->method_type_index_at(index);
565 check_property(valid_symbol_at(ref_index),
566 "Invalid constant pool index %u in class file %s",
567 ref_index, CHECK);
568 break;
569 }
570 case JVM_CONSTANT_Dynamic: {
571 const int name_and_type_ref_index =
572 cp->bootstrap_name_and_type_ref_index_at(index);
573
574 check_property(valid_cp_range(name_and_type_ref_index, length) &&
575 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
576 "Invalid constant pool index %u in class file %s",
577 name_and_type_ref_index, CHECK);
578 // bootstrap specifier index must be checked later,
579 // when BootstrapMethods attr is available
580
581 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
582 cp->set_has_dynamic_constant();
583 break;
584 }
585 case JVM_CONSTANT_InvokeDynamic: {
586 const int name_and_type_ref_index =
587 cp->bootstrap_name_and_type_ref_index_at(index);
588
589 check_property(valid_cp_range(name_and_type_ref_index, length) &&
590 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
591 "Invalid constant pool index %u in class file %s",
592 name_and_type_ref_index, CHECK);
593 // bootstrap specifier index must be checked later,
594 // when BootstrapMethods attr is available
595 break;
596 }
597 default: {
598 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
599 ShouldNotReachHere();
600 break;
601 }
602 } // switch(tag)
603 } // end of for
604
605 _first_patched_klass_resolved_index = num_klasses;
606 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
607
608 if (_cp_patches != NULL) {
609 // need to treat this_class specially...
610
611 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
612 // for now. These will be replaced with actual names of the patched classes in patch_class().
613 Symbol* s = vmSymbols::star_name();
614 for (int n=_orig_cp_size; n<cp->length(); n++) {
615 cp->symbol_at_put(n, s);
616 }
617
618 int this_class_index;
619 {
620 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
621 const u1* const mark = stream->current();
622 stream->skip_u2_fast(1); // skip flags
623 this_class_index = stream->get_u2_fast();
624 stream->set_current(mark); // revert to mark
625 }
626
627 for (index = 1; index < length; index++) { // Index 0 is unused
628 if (has_cp_patch_at(index)) {
629 guarantee_property(index != this_class_index,
630 "Illegal constant pool patch to self at %d in class file %s",
631 index, CHECK);
632 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
633 }
634 }
635 }
636
637 if (!_need_verify) {
638 return;
639 }
640
641 // second verification pass - checks the strings are of the right format.
642 // but not yet to the other entries
643 for (index = 1; index < length; index++) {
644 const jbyte tag = cp->tag_at(index).value();
645 switch (tag) {
646 case JVM_CONSTANT_UnresolvedClass: {
647 const Symbol* const class_name = cp->klass_name_at(index);
648 // check the name, even if _cp_patches will overwrite it
649 verify_legal_class_name(class_name, CHECK);
650 break;
651 }
652 case JVM_CONSTANT_NameAndType: {
653 if (_need_verify) {
654 const int sig_index = cp->signature_ref_index_at(index);
655 const int name_index = cp->name_ref_index_at(index);
656 const Symbol* const name = cp->symbol_at(name_index);
657 const Symbol* const sig = cp->symbol_at(sig_index);
658 guarantee_property(sig->utf8_length() != 0,
659 "Illegal zero length constant pool entry at %d in class %s",
660 sig_index, CHECK);
661 guarantee_property(name->utf8_length() != 0,
662 "Illegal zero length constant pool entry at %d in class %s",
663 name_index, CHECK);
664
665 if (sig->char_at(0) == JVM_SIGNATURE_FUNC) {
666 // Format check method name and signature
667 verify_legal_method_name(name, CHECK);
668 verify_legal_method_signature(name, sig, CHECK);
669 } else {
670 // Format check field name and signature
671 verify_legal_field_name(name, CHECK);
672 verify_legal_field_signature(name, sig, CHECK);
673 }
674 }
675 break;
676 }
677 case JVM_CONSTANT_Dynamic: {
678 const int name_and_type_ref_index =
679 cp->name_and_type_ref_index_at(index);
680 // already verified to be utf8
681 const int name_ref_index =
682 cp->name_ref_index_at(name_and_type_ref_index);
683 // already verified to be utf8
684 const int signature_ref_index =
685 cp->signature_ref_index_at(name_and_type_ref_index);
686 const Symbol* const name = cp->symbol_at(name_ref_index);
687 const Symbol* const signature = cp->symbol_at(signature_ref_index);
688 if (_need_verify) {
689 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
690 // Need only to be sure signature is non-zero length and the right type.
691 if (signature->utf8_length() == 0 ||
692 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
693 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
694 }
695 }
696 break;
697 }
698 case JVM_CONSTANT_InvokeDynamic:
699 case JVM_CONSTANT_Fieldref:
700 case JVM_CONSTANT_Methodref:
701 case JVM_CONSTANT_InterfaceMethodref: {
702 const int name_and_type_ref_index =
703 cp->name_and_type_ref_index_at(index);
704 // already verified to be utf8
705 const int name_ref_index =
706 cp->name_ref_index_at(name_and_type_ref_index);
707 // already verified to be utf8
708 const int signature_ref_index =
709 cp->signature_ref_index_at(name_and_type_ref_index);
710 const Symbol* const name = cp->symbol_at(name_ref_index);
711 const Symbol* const signature = cp->symbol_at(signature_ref_index);
712 if (tag == JVM_CONSTANT_Fieldref) {
713 if (_need_verify) {
714 // Field 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->char_at(0) == JVM_SIGNATURE_FUNC) {
718 throwIllegalSignature("Field", name, signature, CHECK);
719 }
720 }
721 } else {
722 if (_need_verify) {
723 // Method name and signature are verified above, when iterating NameAndType_info.
724 // Need only to be sure signature is non-zero length and the right type.
725 if (signature->utf8_length() == 0 ||
726 signature->char_at(0) != JVM_SIGNATURE_FUNC) {
727 throwIllegalSignature("Method", name, signature, CHECK);
728 }
729 }
730 // 4509014: If a class method name begins with '<', it must be "<init>"
731 const unsigned int name_len = name->utf8_length();
732 if (tag == JVM_CONSTANT_Methodref &&
733 name_len != 0 &&
734 name->char_at(0) == '<' &&
735 name != vmSymbols::object_initializer_name()) {
736 classfile_parse_error(
737 "Bad method name at constant pool index %u in class file %s",
738 name_ref_index, CHECK);
739 }
740 }
741 break;
742 }
743 case JVM_CONSTANT_MethodHandle: {
744 const int ref_index = cp->method_handle_index_at(index);
745 const int ref_kind = cp->method_handle_ref_kind_at(index);
746 switch (ref_kind) {
747 case JVM_REF_invokeVirtual:
748 case JVM_REF_invokeStatic:
749 case JVM_REF_invokeSpecial:
750 case JVM_REF_newInvokeSpecial: {
751 const int name_and_type_ref_index =
752 cp->name_and_type_ref_index_at(ref_index);
753 const int name_ref_index =
754 cp->name_ref_index_at(name_and_type_ref_index);
755 const Symbol* const name = cp->symbol_at(name_ref_index);
756 if (ref_kind == JVM_REF_newInvokeSpecial) {
757 if (name != vmSymbols::object_initializer_name()) {
758 classfile_parse_error(
759 "Bad constructor name at constant pool index %u in class file %s",
760 name_ref_index, CHECK);
761 }
762 } else {
763 if (name == vmSymbols::object_initializer_name()) {
764 classfile_parse_error(
765 "Bad method name at constant pool index %u in class file %s",
766 name_ref_index, CHECK);
767 }
768 }
769 break;
770 }
771 // Other ref_kinds are already fully checked in previous pass.
772 } // switch(ref_kind)
773 break;
774 }
775 case JVM_CONSTANT_MethodType: {
776 const Symbol* const no_name = vmSymbols::type_name(); // place holder
777 const Symbol* const signature = cp->method_type_signature_at(index);
778 verify_legal_method_signature(no_name, signature, CHECK);
779 break;
780 }
781 case JVM_CONSTANT_Utf8: {
782 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
783 }
784 } // switch(tag)
785 } // end of for
786 }
787
788 Handle ClassFileParser::clear_cp_patch_at(int index) {
789 Handle patch = cp_patch_at(index);
790 _cp_patches->at_put(index, Handle());
791 assert(!has_cp_patch_at(index), "");
792 return patch;
793 }
794
795 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
796 int name_index = _orig_cp_size + _num_patched_klasses;
797 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
798
799 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
800 _num_patched_klasses ++;
801 }
802
803 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
804 int index,
805 Handle patch,
806 TRAPS) {
807 assert(cp != NULL, "invariant");
808
809 BasicType patch_type = T_VOID;
810
811 switch (cp->tag_at(index).value()) {
812
813 case JVM_CONSTANT_UnresolvedClass: {
814 // Patching a class means pre-resolving it.
815 // The name in the constant pool is ignored.
816 if (java_lang_Class::is_instance(patch())) {
817 guarantee_property(!java_lang_Class::is_primitive(patch()),
818 "Illegal class patch at %d in class file %s",
819 index, CHECK);
820 Klass* k = java_lang_Class::as_Klass(patch());
821 patch_class(cp, index, k, k->name());
822 } else {
823 guarantee_property(java_lang_String::is_instance(patch()),
824 "Illegal class patch at %d in class file %s",
825 index, CHECK);
826 Symbol* const name = java_lang_String::as_symbol(patch());
827 patch_class(cp, index, NULL, name);
828 }
829 break;
830 }
831
832 case JVM_CONSTANT_String: {
833 // skip this patch and don't clear it. Needs the oop array for resolved
834 // references to be created first.
835 return;
836 }
837 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
838 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
839 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
840 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
841 patch_prim:
842 {
843 jvalue value;
844 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
845 guarantee_property(value_type == patch_type,
846 "Illegal primitive patch at %d in class file %s",
847 index, CHECK);
848 switch (value_type) {
849 case T_INT: cp->int_at_put(index, value.i); break;
850 case T_FLOAT: cp->float_at_put(index, value.f); break;
851 case T_LONG: cp->long_at_put(index, value.j); break;
852 case T_DOUBLE: cp->double_at_put(index, value.d); break;
853 default: assert(false, "");
854 }
855 } // end patch_prim label
856 break;
857
858 default: {
859 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
860 guarantee_property(!has_cp_patch_at(index),
861 "Illegal unexpected patch at %d in class file %s",
862 index, CHECK);
863 return;
864 }
865 } // end of switch(tag)
866
867 // On fall-through, mark the patch as used.
868 clear_cp_patch_at(index);
869 }
870 class NameSigHash: public ResourceObj {
871 public:
872 const Symbol* _name; // name
873 const Symbol* _sig; // signature
874 NameSigHash* _next; // Next entry in hash table
875 };
876
877 static const int HASH_ROW_SIZE = 256;
878
879 static unsigned int hash(const Symbol* name, const Symbol* sig) {
880 unsigned int raw_hash = 0;
881 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
882 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
883
884 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
885 }
886
887
888 static void initialize_hashtable(NameSigHash** table) {
889 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
890 }
891 // Return false if the name/sig combination is found in table.
892 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
893 // The old format checker uses heap sort to find duplicates.
894 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
895 // of table since we don't expect Symbol*'s to move.
896 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
897 assert(name != NULL, "name in constant pool is NULL");
898
899 // First lookup for duplicates
900 int index = hash(name, sig);
901 NameSigHash* entry = table[index];
902 while (entry != NULL) {
903 if (entry->_name == name && entry->_sig == sig) {
904 return false;
905 }
906 entry = entry->_next;
907 }
908
909 // No duplicate is found, allocate a new entry and fill it.
910 entry = new NameSigHash();
911 entry->_name = name;
912 entry->_sig = sig;
913
914 // Insert into hash table
915 entry->_next = table[index];
916 table[index] = entry;
917
918 return true;
919 }
920
921 // Side-effects: populates the _local_interfaces field
922 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
923 const int itfs_len,
924 ConstantPool* const cp,
925 bool* const has_nonstatic_concrete_methods,
926 TRAPS) {
927 assert(stream != NULL, "invariant");
928 assert(cp != NULL, "invariant");
929 assert(has_nonstatic_concrete_methods != NULL, "invariant");
930
931 if (itfs_len == 0) {
932 _local_interfaces = Universe::the_empty_instance_klass_array();
933 } else {
934 assert(itfs_len > 0, "only called for len>0");
935 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
936
937 int index;
938 for (index = 0; index < itfs_len; index++) {
939 const u2 interface_index = stream->get_u2(CHECK);
940 Klass* interf;
941 check_property(
942 valid_klass_reference_at(interface_index),
943 "Interface name has bad constant pool index %u in class file %s",
944 interface_index, CHECK);
945 if (cp->tag_at(interface_index).is_klass()) {
946 interf = cp->resolved_klass_at(interface_index);
947 } else {
948 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
949
950 // Don't need to check legal name because it's checked when parsing constant pool.
951 // But need to make sure it's not an array type.
952 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
953 "Bad interface name in class file %s", CHECK);
954
955 // Call resolve_super so classcircularity is checked
956 interf = SystemDictionary::resolve_super_or_fail(
957 _class_name,
958 unresolved_klass,
959 Handle(THREAD, _loader_data->class_loader()),
960 _protection_domain,
961 false,
962 CHECK);
963 }
964
965 if (!interf->is_interface()) {
966 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
967 err_msg("class %s can not implement %s, because it is not an interface (%s)",
968 _class_name->as_klass_external_name(),
969 interf->external_name(),
970 interf->class_in_module_of_loader()));
971 }
972
973 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
974 *has_nonstatic_concrete_methods = true;
975 }
976 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
977 }
978
979 if (!_need_verify || itfs_len <= 1) {
980 return;
981 }
982
983 // Check if there's any duplicates in interfaces
984 ResourceMark rm(THREAD);
985 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
986 NameSigHash*,
987 HASH_ROW_SIZE);
988 initialize_hashtable(interface_names);
989 bool dup = false;
990 const Symbol* name = NULL;
991 {
992 debug_only(NoSafepointVerifier nsv;)
993 for (index = 0; index < itfs_len; index++) {
994 const InstanceKlass* const k = _local_interfaces->at(index);
995 name = k->name();
996 // If no duplicates, add (name, NULL) in hashtable interface_names.
997 if (!put_after_lookup(name, NULL, interface_names)) {
998 dup = true;
999 break;
1000 }
1001 }
1002 }
1003 if (dup) {
1004 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
1005 name->as_C_string(), CHECK);
1006 }
1007 }
1008 }
1009
1010 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
1011 int constantvalue_index,
1012 int signature_index,
1013 TRAPS) const {
1014 // Make sure the constant pool entry is of a type appropriate to this field
1015 guarantee_property(
1016 (constantvalue_index > 0 &&
1017 constantvalue_index < cp->length()),
1018 "Bad initial value index %u in ConstantValue attribute in class file %s",
1019 constantvalue_index, CHECK);
1020
1021 const constantTag value_type = cp->tag_at(constantvalue_index);
1022 switch(cp->basic_type_for_signature_at(signature_index)) {
1023 case T_LONG: {
1024 guarantee_property(value_type.is_long(),
1025 "Inconsistent constant value type in class file %s",
1026 CHECK);
1027 break;
1028 }
1029 case T_FLOAT: {
1030 guarantee_property(value_type.is_float(),
1031 "Inconsistent constant value type in class file %s",
1032 CHECK);
1033 break;
1034 }
1035 case T_DOUBLE: {
1036 guarantee_property(value_type.is_double(),
1037 "Inconsistent constant value type in class file %s",
1038 CHECK);
1039 break;
1040 }
1041 case T_BYTE:
1042 case T_CHAR:
1043 case T_SHORT:
1044 case T_BOOLEAN:
1045 case T_INT: {
1046 guarantee_property(value_type.is_int(),
1047 "Inconsistent constant value type in class file %s",
1048 CHECK);
1049 break;
1050 }
1051 case T_OBJECT: {
1052 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1053 && value_type.is_string()),
1054 "Bad string initial value in class file %s",
1055 CHECK);
1056 break;
1057 }
1058 default: {
1059 classfile_parse_error("Unable to set initial value %u in class file %s",
1060 constantvalue_index,
1061 CHECK);
1062 }
1063 }
1064 }
1065
1066 class AnnotationCollector : public ResourceObj{
1067 public:
1068 enum Location { _in_field, _in_method, _in_class };
1069 enum ID {
1070 _unknown = 0,
1071 _method_CallerSensitive,
1072 _method_ForceInline,
1073 _method_DontInline,
1074 _method_InjectedProfile,
1075 _method_LambdaForm_Compiled,
1076 _method_Hidden,
1077 _method_HotSpotIntrinsicCandidate,
1078 _jdk_internal_vm_annotation_Contended,
1079 _field_Stable,
1080 _jdk_internal_vm_annotation_ReservedStackAccess,
1081 _annotation_LIMIT
1082 };
1083 const Location _location;
1084 int _annotations_present;
1085 u2 _contended_group;
1086
1087 AnnotationCollector(Location location)
1088 : _location(location), _annotations_present(0)
1089 {
1090 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1091 }
1092 // If this annotation name has an ID, report it (or _none).
1093 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1094 // Set the annotation name:
1095 void set_annotation(ID id) {
1096 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1097 _annotations_present |= nth_bit((int)id);
1098 }
1099
1100 void remove_annotation(ID id) {
1101 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1102 _annotations_present &= ~nth_bit((int)id);
1103 }
1104
1105 // Report if the annotation is present.
1106 bool has_any_annotations() const { return _annotations_present != 0; }
1107 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1108
1109 void set_contended_group(u2 group) { _contended_group = group; }
1110 u2 contended_group() const { return _contended_group; }
1111
1112 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1113
1114 void set_stable(bool stable) { set_annotation(_field_Stable); }
1115 bool is_stable() const { return has_annotation(_field_Stable); }
1116 };
1117
1118 // This class also doubles as a holder for metadata cleanup.
1119 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1120 private:
1121 ClassLoaderData* _loader_data;
1122 AnnotationArray* _field_annotations;
1123 AnnotationArray* _field_type_annotations;
1124 public:
1125 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1126 AnnotationCollector(_in_field),
1127 _loader_data(loader_data),
1128 _field_annotations(NULL),
1129 _field_type_annotations(NULL) {}
1130 ~FieldAnnotationCollector();
1131 void apply_to(FieldInfo* f);
1132 AnnotationArray* field_annotations() { return _field_annotations; }
1133 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1134
1135 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1136 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1137 };
1138
1139 class MethodAnnotationCollector : public AnnotationCollector{
1140 public:
1141 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1142 void apply_to(const methodHandle& m);
1143 };
1144
1145 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1146 public:
1147 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1148 void apply_to(InstanceKlass* ik);
1149 };
1150
1151
1152 static int skip_annotation_value(const u1*, int, int); // fwd decl
1153
1154 // Safely increment index by val if does not pass limit
1155 #define SAFE_ADD(index, limit, val) \
1156 if (index >= limit - val) return limit; \
1157 index += val;
1158
1159 // Skip an annotation. Return >=limit if there is any problem.
1160 static int skip_annotation(const u1* buffer, int limit, int index) {
1161 assert(buffer != NULL, "invariant");
1162 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1163 // value := switch (tag:u1) { ... }
1164 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1165 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1166 while (--nmem >= 0 && index < limit) {
1167 SAFE_ADD(index, limit, 2); // skip member
1168 index = skip_annotation_value(buffer, limit, index);
1169 }
1170 return index;
1171 }
1172
1173 // Skip an annotation value. Return >=limit if there is any problem.
1174 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1175 assert(buffer != NULL, "invariant");
1176
1177 // value := switch (tag:u1) {
1178 // case B, C, I, S, Z, D, F, J, c: con:u2;
1179 // case e: e_class:u2 e_name:u2;
1180 // case s: s_con:u2;
1181 // case [: do(nval:u2) {value};
1182 // case @: annotation;
1183 // case s: s_con:u2;
1184 // }
1185 SAFE_ADD(index, limit, 1); // read tag
1186 const u1 tag = buffer[index - 1];
1187 switch (tag) {
1188 case 'B':
1189 case 'C':
1190 case 'I':
1191 case 'S':
1192 case 'Z':
1193 case 'D':
1194 case 'F':
1195 case 'J':
1196 case 'c':
1197 case 's':
1198 SAFE_ADD(index, limit, 2); // skip con or s_con
1199 break;
1200 case 'e':
1201 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1202 break;
1203 case '[':
1204 {
1205 SAFE_ADD(index, limit, 2); // read nval
1206 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1207 while (--nval >= 0 && index < limit) {
1208 index = skip_annotation_value(buffer, limit, index);
1209 }
1210 }
1211 break;
1212 case '@':
1213 index = skip_annotation(buffer, limit, index);
1214 break;
1215 default:
1216 return limit; // bad tag byte
1217 }
1218 return index;
1219 }
1220
1221 // Sift through annotations, looking for those significant to the VM:
1222 static void parse_annotations(const ConstantPool* const cp,
1223 const u1* buffer, int limit,
1224 AnnotationCollector* coll,
1225 ClassLoaderData* loader_data,
1226 TRAPS) {
1227
1228 assert(cp != NULL, "invariant");
1229 assert(buffer != NULL, "invariant");
1230 assert(coll != NULL, "invariant");
1231 assert(loader_data != NULL, "invariant");
1232
1233 // annotations := do(nann:u2) {annotation}
1234 int index = 2; // read nann
1235 if (index >= limit) return;
1236 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1237 enum { // initial annotation layout
1238 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1239 count_off = 2, // u2 such as 1 (one value)
1240 member_off = 4, // utf8 such as 'value'
1241 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1242 e_tag_val = 'e',
1243 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1244 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1245 e_size = 11, // end of 'e' annotation
1246 c_tag_val = 'c', // payload is type
1247 c_con_off = 7, // utf8 payload, such as 'I'
1248 c_size = 9, // end of 'c' annotation
1249 s_tag_val = 's', // payload is String
1250 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1251 s_size = 9,
1252 min_size = 6 // smallest possible size (zero members)
1253 };
1254 // Cannot add min_size to index in case of overflow MAX_INT
1255 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1256 int index0 = index;
1257 index = skip_annotation(buffer, limit, index);
1258 const u1* const abase = buffer + index0;
1259 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1260 const int count = Bytes::get_Java_u2((address)abase + count_off);
1261 const Symbol* const aname = check_symbol_at(cp, atype);
1262 if (aname == NULL) break; // invalid annotation name
1263 const Symbol* member = NULL;
1264 if (count >= 1) {
1265 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1266 member = check_symbol_at(cp, member_index);
1267 if (member == NULL) break; // invalid member name
1268 }
1269
1270 // Here is where parsing particular annotations will take place.
1271 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1272 if (AnnotationCollector::_unknown == id) continue;
1273 coll->set_annotation(id);
1274
1275 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1276 // @Contended can optionally specify the contention group.
1277 //
1278 // Contended group defines the equivalence class over the fields:
1279 // the fields within the same contended group are not treated distinct.
1280 // The only exception is default group, which does not incur the
1281 // equivalence. Naturally, contention group for classes is meaningless.
1282 //
1283 // While the contention group is specified as String, annotation
1284 // values are already interned, and we might as well use the constant
1285 // pool index as the group tag.
1286 //
1287 u2 group_index = 0; // default contended group
1288 if (count == 1
1289 && s_size == (index - index0) // match size
1290 && s_tag_val == *(abase + tag_off)
1291 && member == vmSymbols::value_name()) {
1292 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1293 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1294 group_index = 0; // default contended group
1295 }
1296 }
1297 coll->set_contended_group(group_index);
1298 }
1299 }
1300 }
1301
1302
1303 // Parse attributes for a field.
1304 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1305 u2 attributes_count,
1306 bool is_static, u2 signature_index,
1307 u2* const constantvalue_index_addr,
1308 bool* const is_synthetic_addr,
1309 u2* const generic_signature_index_addr,
1310 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1311 TRAPS) {
1312 assert(cfs != NULL, "invariant");
1313 assert(constantvalue_index_addr != NULL, "invariant");
1314 assert(is_synthetic_addr != NULL, "invariant");
1315 assert(generic_signature_index_addr != NULL, "invariant");
1316 assert(parsed_annotations != NULL, "invariant");
1317 assert(attributes_count > 0, "attributes_count should be greater than 0");
1318
1319 u2 constantvalue_index = 0;
1320 u2 generic_signature_index = 0;
1321 bool is_synthetic = false;
1322 const u1* runtime_visible_annotations = NULL;
1323 int runtime_visible_annotations_length = 0;
1324 const u1* runtime_invisible_annotations = NULL;
1325 int runtime_invisible_annotations_length = 0;
1326 const u1* runtime_visible_type_annotations = NULL;
1327 int runtime_visible_type_annotations_length = 0;
1328 const u1* runtime_invisible_type_annotations = NULL;
1329 int runtime_invisible_type_annotations_length = 0;
1330 bool runtime_invisible_annotations_exists = false;
1331 bool runtime_invisible_type_annotations_exists = false;
1332 const ConstantPool* const cp = _cp;
1333
1334 while (attributes_count--) {
1335 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1336 const u2 attribute_name_index = cfs->get_u2_fast();
1337 const u4 attribute_length = cfs->get_u4_fast();
1338 check_property(valid_symbol_at(attribute_name_index),
1339 "Invalid field attribute index %u in class file %s",
1340 attribute_name_index,
1341 CHECK);
1342
1343 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1344 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1345 // ignore if non-static
1346 if (constantvalue_index != 0) {
1347 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1348 }
1349 check_property(
1350 attribute_length == 2,
1351 "Invalid ConstantValue field attribute length %u in class file %s",
1352 attribute_length, CHECK);
1353
1354 constantvalue_index = cfs->get_u2(CHECK);
1355 if (_need_verify) {
1356 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1357 }
1358 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1359 if (attribute_length != 0) {
1360 classfile_parse_error(
1361 "Invalid Synthetic field attribute length %u in class file %s",
1362 attribute_length, CHECK);
1363 }
1364 is_synthetic = true;
1365 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1366 if (attribute_length != 0) {
1367 classfile_parse_error(
1368 "Invalid Deprecated field attribute length %u in class file %s",
1369 attribute_length, CHECK);
1370 }
1371 } else if (_major_version >= JAVA_1_5_VERSION) {
1372 if (attribute_name == vmSymbols::tag_signature()) {
1373 if (generic_signature_index != 0) {
1374 classfile_parse_error(
1375 "Multiple Signature attributes for field in class file %s", CHECK);
1376 }
1377 if (attribute_length != 2) {
1378 classfile_parse_error(
1379 "Wrong size %u for field's Signature attribute in class file %s",
1380 attribute_length, CHECK);
1381 }
1382 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1383 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1384 if (runtime_visible_annotations != NULL) {
1385 classfile_parse_error(
1386 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1387 }
1388 runtime_visible_annotations_length = attribute_length;
1389 runtime_visible_annotations = cfs->current();
1390 assert(runtime_visible_annotations != NULL, "null visible annotations");
1391 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1392 parse_annotations(cp,
1393 runtime_visible_annotations,
1394 runtime_visible_annotations_length,
1395 parsed_annotations,
1396 _loader_data,
1397 CHECK);
1398 cfs->skip_u1_fast(runtime_visible_annotations_length);
1399 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1400 if (runtime_invisible_annotations_exists) {
1401 classfile_parse_error(
1402 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1403 }
1404 runtime_invisible_annotations_exists = true;
1405 if (PreserveAllAnnotations) {
1406 runtime_invisible_annotations_length = attribute_length;
1407 runtime_invisible_annotations = cfs->current();
1408 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1409 }
1410 cfs->skip_u1(attribute_length, CHECK);
1411 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1412 if (runtime_visible_type_annotations != NULL) {
1413 classfile_parse_error(
1414 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1415 }
1416 runtime_visible_type_annotations_length = attribute_length;
1417 runtime_visible_type_annotations = cfs->current();
1418 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1419 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1420 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1421 if (runtime_invisible_type_annotations_exists) {
1422 classfile_parse_error(
1423 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1424 } else {
1425 runtime_invisible_type_annotations_exists = true;
1426 }
1427 if (PreserveAllAnnotations) {
1428 runtime_invisible_type_annotations_length = attribute_length;
1429 runtime_invisible_type_annotations = cfs->current();
1430 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1431 }
1432 cfs->skip_u1(attribute_length, CHECK);
1433 } else {
1434 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1435 }
1436 } else {
1437 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1438 }
1439 }
1440
1441 *constantvalue_index_addr = constantvalue_index;
1442 *is_synthetic_addr = is_synthetic;
1443 *generic_signature_index_addr = generic_signature_index;
1444 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1445 runtime_visible_annotations_length,
1446 runtime_invisible_annotations,
1447 runtime_invisible_annotations_length,
1448 CHECK);
1449 parsed_annotations->set_field_annotations(a);
1450 a = assemble_annotations(runtime_visible_type_annotations,
1451 runtime_visible_type_annotations_length,
1452 runtime_invisible_type_annotations,
1453 runtime_invisible_type_annotations_length,
1454 CHECK);
1455 parsed_annotations->set_field_type_annotations(a);
1456 return;
1457 }
1458
1459
1460 // Field allocation types. Used for computing field offsets.
1461
1462 enum FieldAllocationType {
1463 STATIC_OOP, // Oops
1464 STATIC_BYTE, // Boolean, Byte, char
1465 STATIC_SHORT, // shorts
1466 STATIC_WORD, // ints
1467 STATIC_DOUBLE, // aligned long or double
1468 NONSTATIC_OOP,
1469 NONSTATIC_BYTE,
1470 NONSTATIC_SHORT,
1471 NONSTATIC_WORD,
1472 NONSTATIC_DOUBLE,
1473 MAX_FIELD_ALLOCATION_TYPE,
1474 BAD_ALLOCATION_TYPE = -1
1475 };
1476
1477 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1478 BAD_ALLOCATION_TYPE, // 0
1479 BAD_ALLOCATION_TYPE, // 1
1480 BAD_ALLOCATION_TYPE, // 2
1481 BAD_ALLOCATION_TYPE, // 3
1482 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1483 NONSTATIC_SHORT, // T_CHAR = 5,
1484 NONSTATIC_WORD, // T_FLOAT = 6,
1485 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1486 NONSTATIC_BYTE, // T_BYTE = 8,
1487 NONSTATIC_SHORT, // T_SHORT = 9,
1488 NONSTATIC_WORD, // T_INT = 10,
1489 NONSTATIC_DOUBLE, // T_LONG = 11,
1490 NONSTATIC_OOP, // T_OBJECT = 12,
1491 NONSTATIC_OOP, // T_ARRAY = 13,
1492 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1493 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1494 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1495 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1496 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1497 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1498 BAD_ALLOCATION_TYPE, // 0
1499 BAD_ALLOCATION_TYPE, // 1
1500 BAD_ALLOCATION_TYPE, // 2
1501 BAD_ALLOCATION_TYPE, // 3
1502 STATIC_BYTE , // T_BOOLEAN = 4,
1503 STATIC_SHORT, // T_CHAR = 5,
1504 STATIC_WORD, // T_FLOAT = 6,
1505 STATIC_DOUBLE, // T_DOUBLE = 7,
1506 STATIC_BYTE, // T_BYTE = 8,
1507 STATIC_SHORT, // T_SHORT = 9,
1508 STATIC_WORD, // T_INT = 10,
1509 STATIC_DOUBLE, // T_LONG = 11,
1510 STATIC_OOP, // T_OBJECT = 12,
1511 STATIC_OOP, // T_ARRAY = 13,
1512 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1513 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1514 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1515 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1516 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1517 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1518 };
1519
1520 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1521 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1522 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1523 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1524 return result;
1525 }
1526
1527 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1528 public:
1529 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1530
1531 FieldAllocationCount() {
1532 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1533 count[i] = 0;
1534 }
1535 }
1536
1537 FieldAllocationType update(bool is_static, BasicType type) {
1538 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1539 if (atype != BAD_ALLOCATION_TYPE) {
1540 // Make sure there is no overflow with injected fields.
1541 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1542 count[atype]++;
1543 }
1544 return atype;
1545 }
1546 };
1547
1548 // Side-effects: populates the _fields, _fields_annotations,
1549 // _fields_type_annotations fields
1550 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1551 bool is_interface,
1552 FieldAllocationCount* const fac,
1553 ConstantPool* cp,
1554 const int cp_size,
1555 u2* const java_fields_count_ptr,
1556 TRAPS) {
1557
1558 assert(cfs != NULL, "invariant");
1559 assert(fac != NULL, "invariant");
1560 assert(cp != NULL, "invariant");
1561 assert(java_fields_count_ptr != NULL, "invariant");
1562
1563 assert(NULL == _fields, "invariant");
1564 assert(NULL == _fields_annotations, "invariant");
1565 assert(NULL == _fields_type_annotations, "invariant");
1566
1567 cfs->guarantee_more(2, CHECK); // length
1568 const u2 length = cfs->get_u2_fast();
1569 *java_fields_count_ptr = length;
1570
1571 int num_injected = 0;
1572 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1573 &num_injected);
1574 const int total_fields = length + num_injected;
1575
1576 // The field array starts with tuples of shorts
1577 // [access, name index, sig index, initial value index, byte offset].
1578 // A generic signature slot only exists for field with generic
1579 // signature attribute. And the access flag is set with
1580 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1581 // signature slots are at the end of the field array and after all
1582 // other fields data.
1583 //
1584 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1585 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1586 // ...
1587 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1588 // [generic signature index]
1589 // [generic signature index]
1590 // ...
1591 //
1592 // Allocate a temporary resource array for field data. For each field,
1593 // a slot is reserved in the temporary array for the generic signature
1594 // index. After parsing all fields, the data are copied to a permanent
1595 // array and any unused slots will be discarded.
1596 ResourceMark rm(THREAD);
1597 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1598 u2,
1599 total_fields * (FieldInfo::field_slots + 1));
1600
1601 // The generic signature slots start after all other fields' data.
1602 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1603 int num_generic_signature = 0;
1604 for (int n = 0; n < length; n++) {
1605 // access_flags, name_index, descriptor_index, attributes_count
1606 cfs->guarantee_more(8, CHECK);
1607
1608 AccessFlags access_flags;
1609 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1610 verify_legal_field_modifiers(flags, is_interface, CHECK);
1611 access_flags.set_flags(flags);
1612
1613 const u2 name_index = cfs->get_u2_fast();
1614 check_property(valid_symbol_at(name_index),
1615 "Invalid constant pool index %u for field name in class file %s",
1616 name_index, CHECK);
1617 const Symbol* const name = cp->symbol_at(name_index);
1618 verify_legal_field_name(name, CHECK);
1619
1620 const u2 signature_index = cfs->get_u2_fast();
1621 check_property(valid_symbol_at(signature_index),
1622 "Invalid constant pool index %u for field signature in class file %s",
1623 signature_index, CHECK);
1624 const Symbol* const sig = cp->symbol_at(signature_index);
1625 verify_legal_field_signature(name, sig, CHECK);
1626
1627 u2 constantvalue_index = 0;
1628 bool is_synthetic = false;
1629 u2 generic_signature_index = 0;
1630 const bool is_static = access_flags.is_static();
1631 FieldAnnotationCollector parsed_annotations(_loader_data);
1632
1633 const u2 attributes_count = cfs->get_u2_fast();
1634 if (attributes_count > 0) {
1635 parse_field_attributes(cfs,
1636 attributes_count,
1637 is_static,
1638 signature_index,
1639 &constantvalue_index,
1640 &is_synthetic,
1641 &generic_signature_index,
1642 &parsed_annotations,
1643 CHECK);
1644
1645 if (parsed_annotations.field_annotations() != NULL) {
1646 if (_fields_annotations == NULL) {
1647 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1648 _loader_data, length, NULL,
1649 CHECK);
1650 }
1651 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1652 parsed_annotations.set_field_annotations(NULL);
1653 }
1654 if (parsed_annotations.field_type_annotations() != NULL) {
1655 if (_fields_type_annotations == NULL) {
1656 _fields_type_annotations =
1657 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1658 length,
1659 NULL,
1660 CHECK);
1661 }
1662 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1663 parsed_annotations.set_field_type_annotations(NULL);
1664 }
1665
1666 if (is_synthetic) {
1667 access_flags.set_is_synthetic();
1668 }
1669 if (generic_signature_index != 0) {
1670 access_flags.set_field_has_generic_signature();
1671 fa[generic_signature_slot] = generic_signature_index;
1672 generic_signature_slot ++;
1673 num_generic_signature ++;
1674 }
1675 }
1676
1677 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1678 field->initialize(access_flags.as_short(),
1679 name_index,
1680 signature_index,
1681 constantvalue_index);
1682 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1683
1684 // Remember how many oops we encountered and compute allocation type
1685 const FieldAllocationType atype = fac->update(is_static, type);
1686 field->set_allocation_type(atype);
1687
1688 // After field is initialized with type, we can augment it with aux info
1689 if (parsed_annotations.has_any_annotations())
1690 parsed_annotations.apply_to(field);
1691 }
1692
1693 int index = length;
1694 if (num_injected != 0) {
1695 for (int n = 0; n < num_injected; n++) {
1696 // Check for duplicates
1697 if (injected[n].may_be_java) {
1698 const Symbol* const name = injected[n].name();
1699 const Symbol* const signature = injected[n].signature();
1700 bool duplicate = false;
1701 for (int i = 0; i < length; i++) {
1702 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1703 if (name == cp->symbol_at(f->name_index()) &&
1704 signature == cp->symbol_at(f->signature_index())) {
1705 // Symbol is desclared in Java so skip this one
1706 duplicate = true;
1707 break;
1708 }
1709 }
1710 if (duplicate) {
1711 // These will be removed from the field array at the end
1712 continue;
1713 }
1714 }
1715
1716 // Injected field
1717 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1718 field->initialize(JVM_ACC_FIELD_INTERNAL,
1719 injected[n].name_index,
1720 injected[n].signature_index,
1721 0);
1722
1723 const BasicType type = FieldType::basic_type(injected[n].signature());
1724
1725 // Remember how many oops we encountered and compute allocation type
1726 const FieldAllocationType atype = fac->update(false, type);
1727 field->set_allocation_type(atype);
1728 index++;
1729 }
1730 }
1731
1732 assert(NULL == _fields, "invariant");
1733
1734 _fields =
1735 MetadataFactory::new_array<u2>(_loader_data,
1736 index * FieldInfo::field_slots + num_generic_signature,
1737 CHECK);
1738 // Sometimes injected fields already exist in the Java source so
1739 // the fields array could be too long. In that case the
1740 // fields array is trimed. Also unused slots that were reserved
1741 // for generic signature indexes are discarded.
1742 {
1743 int i = 0;
1744 for (; i < index * FieldInfo::field_slots; i++) {
1745 _fields->at_put(i, fa[i]);
1746 }
1747 for (int j = total_fields * FieldInfo::field_slots;
1748 j < generic_signature_slot; j++) {
1749 _fields->at_put(i++, fa[j]);
1750 }
1751 assert(_fields->length() == i, "");
1752 }
1753
1754 if (_need_verify && length > 1) {
1755 // Check duplicated fields
1756 ResourceMark rm(THREAD);
1757 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1758 THREAD, NameSigHash*, HASH_ROW_SIZE);
1759 initialize_hashtable(names_and_sigs);
1760 bool dup = false;
1761 const Symbol* name = NULL;
1762 const Symbol* sig = NULL;
1763 {
1764 debug_only(NoSafepointVerifier nsv;)
1765 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1766 name = fs.name();
1767 sig = fs.signature();
1768 // If no duplicates, add name/signature in hashtable names_and_sigs.
1769 if (!put_after_lookup(name, sig, names_and_sigs)) {
1770 dup = true;
1771 break;
1772 }
1773 }
1774 }
1775 if (dup) {
1776 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1777 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1778 }
1779 }
1780 }
1781
1782
1783 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1784 u4 code_length,
1785 u4 exception_table_length,
1786 TRAPS) {
1787 assert(cfs != NULL, "invariant");
1788
1789 const unsafe_u2* const exception_table_start = cfs->current();
1790 assert(exception_table_start != NULL, "null exception table");
1791
1792 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1793 // end_pc,
1794 // handler_pc,
1795 // catch_type_index
1796
1797 // Will check legal target after parsing code array in verifier.
1798 if (_need_verify) {
1799 for (unsigned int i = 0; i < exception_table_length; i++) {
1800 const u2 start_pc = cfs->get_u2_fast();
1801 const u2 end_pc = cfs->get_u2_fast();
1802 const u2 handler_pc = cfs->get_u2_fast();
1803 const u2 catch_type_index = cfs->get_u2_fast();
1804 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1805 "Illegal exception table range in class file %s",
1806 CHECK_NULL);
1807 guarantee_property(handler_pc < code_length,
1808 "Illegal exception table handler in class file %s",
1809 CHECK_NULL);
1810 if (catch_type_index != 0) {
1811 guarantee_property(valid_klass_reference_at(catch_type_index),
1812 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1813 }
1814 }
1815 } else {
1816 cfs->skip_u2_fast(exception_table_length * 4);
1817 }
1818 return exception_table_start;
1819 }
1820
1821 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1822 u4 code_length,
1823 CompressedLineNumberWriteStream**const write_stream,
1824 TRAPS) {
1825
1826 const ClassFileStream* const cfs = _stream;
1827 unsigned int num_entries = cfs->get_u2(CHECK);
1828
1829 // Each entry is a u2 start_pc, and a u2 line_number
1830 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1831
1832 // Verify line number attribute and table length
1833 check_property(
1834 code_attribute_length == sizeof(u2) + length_in_bytes,
1835 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1836
1837 cfs->guarantee_more(length_in_bytes, CHECK);
1838
1839 if ((*write_stream) == NULL) {
1840 if (length_in_bytes > fixed_buffer_size) {
1841 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1842 } else {
1843 (*write_stream) = new CompressedLineNumberWriteStream(
1844 _linenumbertable_buffer, fixed_buffer_size);
1845 }
1846 }
1847
1848 while (num_entries-- > 0) {
1849 const u2 bci = cfs->get_u2_fast(); // start_pc
1850 const u2 line = cfs->get_u2_fast(); // line_number
1851 guarantee_property(bci < code_length,
1852 "Invalid pc in LineNumberTable in class file %s", CHECK);
1853 (*write_stream)->write_pair(bci, line);
1854 }
1855 }
1856
1857
1858 class LVT_Hash : public AllStatic {
1859 public:
1860
1861 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1862 /*
1863 * 3-tuple start_bci/length/slot has to be unique key,
1864 * so the following comparison seems to be redundant:
1865 * && elem->name_cp_index == entry->_elem->name_cp_index
1866 */
1867 return (e0.start_bci == e1.start_bci &&
1868 e0.length == e1.length &&
1869 e0.name_cp_index == e1.name_cp_index &&
1870 e0.slot == e1.slot);
1871 }
1872
1873 static unsigned int hash(LocalVariableTableElement const& e0) {
1874 unsigned int raw_hash = e0.start_bci;
1875
1876 raw_hash = e0.length + raw_hash * 37;
1877 raw_hash = e0.name_cp_index + raw_hash * 37;
1878 raw_hash = e0.slot + raw_hash * 37;
1879
1880 return raw_hash;
1881 }
1882 };
1883
1884
1885 // Class file LocalVariableTable elements.
1886 class Classfile_LVT_Element {
1887 public:
1888 u2 start_bci;
1889 u2 length;
1890 u2 name_cp_index;
1891 u2 descriptor_cp_index;
1892 u2 slot;
1893 };
1894
1895 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1896 LocalVariableTableElement* const lvt) {
1897 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1898 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1899 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1900 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1901 lvt->signature_cp_index = 0;
1902 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1903 }
1904
1905 // Function is used to parse both attributes:
1906 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1907 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1908 u4 code_length,
1909 u2 max_locals,
1910 u4 code_attribute_length,
1911 u2* const localvariable_table_length,
1912 bool isLVTT,
1913 TRAPS) {
1914 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1915 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1916 const unsigned int size =
1917 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1918
1919 const ConstantPool* const cp = _cp;
1920
1921 // Verify local variable table attribute has right length
1922 if (_need_verify) {
1923 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1924 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1925 }
1926
1927 const unsafe_u2* const localvariable_table_start = cfs->current();
1928 assert(localvariable_table_start != NULL, "null local variable table");
1929 if (!_need_verify) {
1930 cfs->skip_u2_fast(size);
1931 } else {
1932 cfs->guarantee_more(size * 2, CHECK_NULL);
1933 for(int i = 0; i < (*localvariable_table_length); i++) {
1934 const u2 start_pc = cfs->get_u2_fast();
1935 const u2 length = cfs->get_u2_fast();
1936 const u2 name_index = cfs->get_u2_fast();
1937 const u2 descriptor_index = cfs->get_u2_fast();
1938 const u2 index = cfs->get_u2_fast();
1939 // Assign to a u4 to avoid overflow
1940 const u4 end_pc = (u4)start_pc + (u4)length;
1941
1942 if (start_pc >= code_length) {
1943 classfile_parse_error(
1944 "Invalid start_pc %u in %s in class file %s",
1945 start_pc, tbl_name, CHECK_NULL);
1946 }
1947 if (end_pc > code_length) {
1948 classfile_parse_error(
1949 "Invalid length %u in %s in class file %s",
1950 length, tbl_name, CHECK_NULL);
1951 }
1952 const int cp_size = cp->length();
1953 guarantee_property(valid_symbol_at(name_index),
1954 "Name index %u in %s has bad constant type in class file %s",
1955 name_index, tbl_name, CHECK_NULL);
1956 guarantee_property(valid_symbol_at(descriptor_index),
1957 "Signature index %u in %s has bad constant type in class file %s",
1958 descriptor_index, tbl_name, CHECK_NULL);
1959
1960 const Symbol* const name = cp->symbol_at(name_index);
1961 const Symbol* const sig = cp->symbol_at(descriptor_index);
1962 verify_legal_field_name(name, CHECK_NULL);
1963 u2 extra_slot = 0;
1964 if (!isLVTT) {
1965 verify_legal_field_signature(name, sig, CHECK_NULL);
1966
1967 // 4894874: check special cases for double and long local variables
1968 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1969 sig == vmSymbols::type_signature(T_LONG)) {
1970 extra_slot = 1;
1971 }
1972 }
1973 guarantee_property((index + extra_slot) < max_locals,
1974 "Invalid index %u in %s in class file %s",
1975 index, tbl_name, CHECK_NULL);
1976 }
1977 }
1978 return localvariable_table_start;
1979 }
1980
1981 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1982 u4 code_attribute_length,
1983 bool need_verify,
1984 TRAPS) {
1985 assert(cfs != NULL, "invariant");
1986
1987 if (0 == code_attribute_length) {
1988 return NULL;
1989 }
1990
1991 const u1* const stackmap_table_start = cfs->current();
1992 assert(stackmap_table_start != NULL, "null stackmap table");
1993
1994 // check code_attribute_length first
1995 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1996
1997 if (!need_verify && !DumpSharedSpaces) {
1998 return NULL;
1999 }
2000 return stackmap_table_start;
2001 }
2002
2003 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2004 u2* const checked_exceptions_length,
2005 u4 method_attribute_length,
2006 TRAPS) {
2007 assert(cfs != NULL, "invariant");
2008 assert(checked_exceptions_length != NULL, "invariant");
2009
2010 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2011 *checked_exceptions_length = cfs->get_u2_fast();
2012 const unsigned int size =
2013 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2014 const unsafe_u2* const checked_exceptions_start = cfs->current();
2015 assert(checked_exceptions_start != NULL, "null checked exceptions");
2016 if (!_need_verify) {
2017 cfs->skip_u2_fast(size);
2018 } else {
2019 // Verify each value in the checked exception table
2020 u2 checked_exception;
2021 const u2 len = *checked_exceptions_length;
2022 cfs->guarantee_more(2 * len, CHECK_NULL);
2023 for (int i = 0; i < len; i++) {
2024 checked_exception = cfs->get_u2_fast();
2025 check_property(
2026 valid_klass_reference_at(checked_exception),
2027 "Exception name has bad type at constant pool %u in class file %s",
2028 checked_exception, CHECK_NULL);
2029 }
2030 }
2031 // check exceptions attribute length
2032 if (_need_verify) {
2033 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2034 sizeof(u2) * size),
2035 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2036 }
2037 return checked_exceptions_start;
2038 }
2039
2040 void ClassFileParser::throwIllegalSignature(const char* type,
2041 const Symbol* name,
2042 const Symbol* sig,
2043 TRAPS) const {
2044 assert(name != NULL, "invariant");
2045 assert(sig != NULL, "invariant");
2046
2047 ResourceMark rm(THREAD);
2048 Exceptions::fthrow(THREAD_AND_LOCATION,
2049 vmSymbols::java_lang_ClassFormatError(),
2050 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2051 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2052 }
2053
2054 AnnotationCollector::ID
2055 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2056 const Symbol* name) {
2057 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2058 // Privileged code can use all annotations. Other code silently drops some.
2059 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2060 loader_data->is_platform_class_loader_data() ||
2061 loader_data->is_unsafe_anonymous();
2062 switch (sid) {
2063 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2064 if (_location != _in_method) break; // only allow for methods
2065 if (!privileged) break; // only allow in privileged code
2066 return _method_CallerSensitive;
2067 }
2068 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2069 if (_location != _in_method) break; // only allow for methods
2070 if (!privileged) break; // only allow in privileged code
2071 return _method_ForceInline;
2072 }
2073 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2074 if (_location != _in_method) break; // only allow for methods
2075 if (!privileged) break; // only allow in privileged code
2076 return _method_DontInline;
2077 }
2078 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2079 if (_location != _in_method) break; // only allow for methods
2080 if (!privileged) break; // only allow in privileged code
2081 return _method_InjectedProfile;
2082 }
2083 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2084 if (_location != _in_method) break; // only allow for methods
2085 if (!privileged) break; // only allow in privileged code
2086 return _method_LambdaForm_Compiled;
2087 }
2088 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2089 if (_location != _in_method) break; // only allow for methods
2090 if (!privileged) break; // only allow in privileged code
2091 return _method_Hidden;
2092 }
2093 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2094 if (_location != _in_method) break; // only allow for methods
2095 if (!privileged) break; // only allow in privileged code
2096 return _method_HotSpotIntrinsicCandidate;
2097 }
2098 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2099 if (_location != _in_field) break; // only allow for fields
2100 if (!privileged) break; // only allow in privileged code
2101 return _field_Stable;
2102 }
2103 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2104 if (_location != _in_field && _location != _in_class) {
2105 break; // only allow for fields and classes
2106 }
2107 if (!EnableContended || (RestrictContended && !privileged)) {
2108 break; // honor privileges
2109 }
2110 return _jdk_internal_vm_annotation_Contended;
2111 }
2112 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2113 if (_location != _in_method) break; // only allow for methods
2114 if (RestrictReservedStack && !privileged) break; // honor privileges
2115 return _jdk_internal_vm_annotation_ReservedStackAccess;
2116 }
2117 default: {
2118 break;
2119 }
2120 }
2121 return AnnotationCollector::_unknown;
2122 }
2123
2124 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2125 if (is_contended())
2126 f->set_contended_group(contended_group());
2127 if (is_stable())
2128 f->set_stable(true);
2129 }
2130
2131 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2132 // If there's an error deallocate metadata for field annotations
2133 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2134 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2135 }
2136
2137 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2138 if (has_annotation(_method_CallerSensitive))
2139 m->set_caller_sensitive(true);
2140 if (has_annotation(_method_ForceInline))
2141 m->set_force_inline(true);
2142 if (has_annotation(_method_DontInline))
2143 m->set_dont_inline(true);
2144 if (has_annotation(_method_InjectedProfile))
2145 m->set_has_injected_profile(true);
2146 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2147 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2148 if (has_annotation(_method_Hidden))
2149 m->set_hidden(true);
2150 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2151 m->set_intrinsic_candidate(true);
2152 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2153 m->set_has_reserved_stack_access(true);
2154 }
2155
2156 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2157 assert(ik != NULL, "invariant");
2158 ik->set_is_contended(is_contended());
2159 }
2160
2161 #define MAX_ARGS_SIZE 255
2162 #define MAX_CODE_SIZE 65535
2163 #define INITIAL_MAX_LVT_NUMBER 256
2164
2165 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2166 *
2167 * Rules for LVT's and LVTT's are:
2168 * - There can be any number of LVT's and LVTT's.
2169 * - If there are n LVT's, it is the same as if there was just
2170 * one LVT containing all the entries from the n LVT's.
2171 * - There may be no more than one LVT entry per local variable.
2172 * Two LVT entries are 'equal' if these fields are the same:
2173 * start_pc, length, name, slot
2174 * - There may be no more than one LVTT entry per each LVT entry.
2175 * Each LVTT entry has to match some LVT entry.
2176 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2177 */
2178 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2179 int lvt_cnt,
2180 u2* const localvariable_table_length,
2181 const unsafe_u2** const localvariable_table_start,
2182 int lvtt_cnt,
2183 u2* const localvariable_type_table_length,
2184 const unsafe_u2** const localvariable_type_table_start,
2185 TRAPS) {
2186
2187 ResourceMark rm(THREAD);
2188
2189 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2190 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2191
2192 LVT_HashTable* const table = new LVT_HashTable();
2193
2194 // To fill LocalVariableTable in
2195 const Classfile_LVT_Element* cf_lvt;
2196 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2197
2198 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2199 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2200 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2201 copy_lvt_element(&cf_lvt[idx], lvt);
2202 // If no duplicates, add LVT elem in hashtable.
2203 if (table->put(*lvt, lvt) == false
2204 && _need_verify
2205 && _major_version >= JAVA_1_5_VERSION) {
2206 classfile_parse_error("Duplicated LocalVariableTable attribute "
2207 "entry for '%s' in class file %s",
2208 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2209 CHECK);
2210 }
2211 }
2212 }
2213
2214 // To merge LocalVariableTable and LocalVariableTypeTable
2215 const Classfile_LVT_Element* cf_lvtt;
2216 LocalVariableTableElement lvtt_elem;
2217
2218 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2219 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2220 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2221 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2222 LocalVariableTableElement** entry = table->get(lvtt_elem);
2223 if (entry == NULL) {
2224 if (_need_verify) {
2225 classfile_parse_error("LVTT entry for '%s' in class file %s "
2226 "does not match any LVT entry",
2227 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2228 CHECK);
2229 }
2230 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2231 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2232 "entry for '%s' in class file %s",
2233 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2234 CHECK);
2235 } else {
2236 // to add generic signatures into LocalVariableTable
2237 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2238 }
2239 }
2240 }
2241 }
2242
2243
2244 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2245 const u1* runtime_visible_annotations,
2246 int runtime_visible_annotations_length,
2247 const u1* runtime_invisible_annotations,
2248 int runtime_invisible_annotations_length,
2249 const u1* runtime_visible_parameter_annotations,
2250 int runtime_visible_parameter_annotations_length,
2251 const u1* runtime_invisible_parameter_annotations,
2252 int runtime_invisible_parameter_annotations_length,
2253 const u1* runtime_visible_type_annotations,
2254 int runtime_visible_type_annotations_length,
2255 const u1* runtime_invisible_type_annotations,
2256 int runtime_invisible_type_annotations_length,
2257 const u1* annotation_default,
2258 int annotation_default_length,
2259 TRAPS) {
2260
2261 AnnotationArray* a;
2262
2263 if (runtime_visible_annotations_length +
2264 runtime_invisible_annotations_length > 0) {
2265 a = assemble_annotations(runtime_visible_annotations,
2266 runtime_visible_annotations_length,
2267 runtime_invisible_annotations,
2268 runtime_invisible_annotations_length,
2269 CHECK);
2270 cm->set_method_annotations(a);
2271 }
2272
2273 if (runtime_visible_parameter_annotations_length +
2274 runtime_invisible_parameter_annotations_length > 0) {
2275 a = assemble_annotations(runtime_visible_parameter_annotations,
2276 runtime_visible_parameter_annotations_length,
2277 runtime_invisible_parameter_annotations,
2278 runtime_invisible_parameter_annotations_length,
2279 CHECK);
2280 cm->set_parameter_annotations(a);
2281 }
2282
2283 if (annotation_default_length > 0) {
2284 a = assemble_annotations(annotation_default,
2285 annotation_default_length,
2286 NULL,
2287 0,
2288 CHECK);
2289 cm->set_default_annotations(a);
2290 }
2291
2292 if (runtime_visible_type_annotations_length +
2293 runtime_invisible_type_annotations_length > 0) {
2294 a = assemble_annotations(runtime_visible_type_annotations,
2295 runtime_visible_type_annotations_length,
2296 runtime_invisible_type_annotations,
2297 runtime_invisible_type_annotations_length,
2298 CHECK);
2299 cm->set_type_annotations(a);
2300 }
2301 }
2302
2303
2304 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2305 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2306 // Method* to save footprint, so we only know the size of the resulting Method* when the
2307 // entire method attribute is parsed.
2308 //
2309 // The promoted_flags parameter is used to pass relevant access_flags
2310 // from the method back up to the containing klass. These flag values
2311 // are added to klass's access_flags.
2312
2313 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2314 bool is_interface,
2315 const ConstantPool* cp,
2316 AccessFlags* const promoted_flags,
2317 TRAPS) {
2318 assert(cfs != NULL, "invariant");
2319 assert(cp != NULL, "invariant");
2320 assert(promoted_flags != NULL, "invariant");
2321
2322 ResourceMark rm(THREAD);
2323 // Parse fixed parts:
2324 // access_flags, name_index, descriptor_index, attributes_count
2325 cfs->guarantee_more(8, CHECK_NULL);
2326
2327 int flags = cfs->get_u2_fast();
2328 const u2 name_index = cfs->get_u2_fast();
2329 const int cp_size = cp->length();
2330 check_property(
2331 valid_symbol_at(name_index),
2332 "Illegal constant pool index %u for method name in class file %s",
2333 name_index, CHECK_NULL);
2334 const Symbol* const name = cp->symbol_at(name_index);
2335 verify_legal_method_name(name, CHECK_NULL);
2336
2337 const u2 signature_index = cfs->get_u2_fast();
2338 guarantee_property(
2339 valid_symbol_at(signature_index),
2340 "Illegal constant pool index %u for method signature in class file %s",
2341 signature_index, CHECK_NULL);
2342 const Symbol* const signature = cp->symbol_at(signature_index);
2343
2344 if (name == vmSymbols::class_initializer_name()) {
2345 // We ignore the other access flags for a valid class initializer.
2346 // (JVM Spec 2nd ed., chapter 4.6)
2347 if (_major_version < 51) { // backward compatibility
2348 flags = JVM_ACC_STATIC;
2349 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2350 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2351 } else {
2352 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2353 }
2354 } else {
2355 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2356 }
2357
2358 if (name == vmSymbols::object_initializer_name() && is_interface) {
2359 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2360 }
2361
2362 int args_size = -1; // only used when _need_verify is true
2363 if (_need_verify) {
2364 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2365 verify_legal_method_signature(name, signature, CHECK_NULL);
2366 if (args_size > MAX_ARGS_SIZE) {
2367 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2368 }
2369 }
2370
2371 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2372
2373 // Default values for code and exceptions attribute elements
2374 u2 max_stack = 0;
2375 u2 max_locals = 0;
2376 u4 code_length = 0;
2377 const u1* code_start = 0;
2378 u2 exception_table_length = 0;
2379 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2380 Array<int>* exception_handlers = Universe::the_empty_int_array();
2381 u2 checked_exceptions_length = 0;
2382 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2383 CompressedLineNumberWriteStream* linenumber_table = NULL;
2384 int linenumber_table_length = 0;
2385 int total_lvt_length = 0;
2386 u2 lvt_cnt = 0;
2387 u2 lvtt_cnt = 0;
2388 bool lvt_allocated = false;
2389 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2390 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2391 u2* localvariable_table_length = NULL;
2392 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2393 u2* localvariable_type_table_length = NULL;
2394 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2395 int method_parameters_length = -1;
2396 const u1* method_parameters_data = NULL;
2397 bool method_parameters_seen = false;
2398 bool parsed_code_attribute = false;
2399 bool parsed_checked_exceptions_attribute = false;
2400 bool parsed_stackmap_attribute = false;
2401 // stackmap attribute - JDK1.5
2402 const u1* stackmap_data = NULL;
2403 int stackmap_data_length = 0;
2404 u2 generic_signature_index = 0;
2405 MethodAnnotationCollector parsed_annotations;
2406 const u1* runtime_visible_annotations = NULL;
2407 int runtime_visible_annotations_length = 0;
2408 const u1* runtime_invisible_annotations = NULL;
2409 int runtime_invisible_annotations_length = 0;
2410 const u1* runtime_visible_parameter_annotations = NULL;
2411 int runtime_visible_parameter_annotations_length = 0;
2412 const u1* runtime_invisible_parameter_annotations = NULL;
2413 int runtime_invisible_parameter_annotations_length = 0;
2414 const u1* runtime_visible_type_annotations = NULL;
2415 int runtime_visible_type_annotations_length = 0;
2416 const u1* runtime_invisible_type_annotations = NULL;
2417 int runtime_invisible_type_annotations_length = 0;
2418 bool runtime_invisible_annotations_exists = false;
2419 bool runtime_invisible_type_annotations_exists = false;
2420 bool runtime_invisible_parameter_annotations_exists = false;
2421 const u1* annotation_default = NULL;
2422 int annotation_default_length = 0;
2423
2424 // Parse code and exceptions attribute
2425 u2 method_attributes_count = cfs->get_u2_fast();
2426 while (method_attributes_count--) {
2427 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2428 const u2 method_attribute_name_index = cfs->get_u2_fast();
2429 const u4 method_attribute_length = cfs->get_u4_fast();
2430 check_property(
2431 valid_symbol_at(method_attribute_name_index),
2432 "Invalid method attribute name index %u in class file %s",
2433 method_attribute_name_index, CHECK_NULL);
2434
2435 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2436 if (method_attribute_name == vmSymbols::tag_code()) {
2437 // Parse Code attribute
2438 if (_need_verify) {
2439 guarantee_property(
2440 !access_flags.is_native() && !access_flags.is_abstract(),
2441 "Code attribute in native or abstract methods in class file %s",
2442 CHECK_NULL);
2443 }
2444 if (parsed_code_attribute) {
2445 classfile_parse_error("Multiple Code attributes in class file %s",
2446 CHECK_NULL);
2447 }
2448 parsed_code_attribute = true;
2449
2450 // Stack size, locals size, and code size
2451 if (_major_version == 45 && _minor_version <= 2) {
2452 cfs->guarantee_more(4, CHECK_NULL);
2453 max_stack = cfs->get_u1_fast();
2454 max_locals = cfs->get_u1_fast();
2455 code_length = cfs->get_u2_fast();
2456 } else {
2457 cfs->guarantee_more(8, CHECK_NULL);
2458 max_stack = cfs->get_u2_fast();
2459 max_locals = cfs->get_u2_fast();
2460 code_length = cfs->get_u4_fast();
2461 }
2462 if (_need_verify) {
2463 guarantee_property(args_size <= max_locals,
2464 "Arguments can't fit into locals in class file %s",
2465 CHECK_NULL);
2466 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2467 "Invalid method Code length %u in class file %s",
2468 code_length, CHECK_NULL);
2469 }
2470 // Code pointer
2471 code_start = cfs->current();
2472 assert(code_start != NULL, "null code start");
2473 cfs->guarantee_more(code_length, CHECK_NULL);
2474 cfs->skip_u1_fast(code_length);
2475
2476 // Exception handler table
2477 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2478 exception_table_length = cfs->get_u2_fast();
2479 if (exception_table_length > 0) {
2480 exception_table_start = parse_exception_table(cfs,
2481 code_length,
2482 exception_table_length,
2483 CHECK_NULL);
2484 }
2485
2486 // Parse additional attributes in code attribute
2487 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2488 u2 code_attributes_count = cfs->get_u2_fast();
2489
2490 unsigned int calculated_attribute_length = 0;
2491
2492 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2493 calculated_attribute_length =
2494 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2495 } else {
2496 // max_stack, locals and length are smaller in pre-version 45.2 classes
2497 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2498 }
2499 calculated_attribute_length +=
2500 code_length +
2501 sizeof(exception_table_length) +
2502 sizeof(code_attributes_count) +
2503 exception_table_length *
2504 ( sizeof(u2) + // start_pc
2505 sizeof(u2) + // end_pc
2506 sizeof(u2) + // handler_pc
2507 sizeof(u2) ); // catch_type_index
2508
2509 while (code_attributes_count--) {
2510 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2511 const u2 code_attribute_name_index = cfs->get_u2_fast();
2512 const u4 code_attribute_length = cfs->get_u4_fast();
2513 calculated_attribute_length += code_attribute_length +
2514 sizeof(code_attribute_name_index) +
2515 sizeof(code_attribute_length);
2516 check_property(valid_symbol_at(code_attribute_name_index),
2517 "Invalid code attribute name index %u in class file %s",
2518 code_attribute_name_index,
2519 CHECK_NULL);
2520 if (LoadLineNumberTables &&
2521 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2522 // Parse and compress line number table
2523 parse_linenumber_table(code_attribute_length,
2524 code_length,
2525 &linenumber_table,
2526 CHECK_NULL);
2527
2528 } else if (LoadLocalVariableTables &&
2529 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2530 // Parse local variable table
2531 if (!lvt_allocated) {
2532 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2533 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2534 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2535 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2536 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2537 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2538 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2539 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2540 lvt_allocated = true;
2541 }
2542 if (lvt_cnt == max_lvt_cnt) {
2543 max_lvt_cnt <<= 1;
2544 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2545 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2546 }
2547 localvariable_table_start[lvt_cnt] =
2548 parse_localvariable_table(cfs,
2549 code_length,
2550 max_locals,
2551 code_attribute_length,
2552 &localvariable_table_length[lvt_cnt],
2553 false, // is not LVTT
2554 CHECK_NULL);
2555 total_lvt_length += localvariable_table_length[lvt_cnt];
2556 lvt_cnt++;
2557 } else if (LoadLocalVariableTypeTables &&
2558 _major_version >= JAVA_1_5_VERSION &&
2559 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2560 if (!lvt_allocated) {
2561 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2562 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2563 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2564 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2565 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2566 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2567 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2568 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2569 lvt_allocated = true;
2570 }
2571 // Parse local variable type table
2572 if (lvtt_cnt == max_lvtt_cnt) {
2573 max_lvtt_cnt <<= 1;
2574 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2575 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2576 }
2577 localvariable_type_table_start[lvtt_cnt] =
2578 parse_localvariable_table(cfs,
2579 code_length,
2580 max_locals,
2581 code_attribute_length,
2582 &localvariable_type_table_length[lvtt_cnt],
2583 true, // is LVTT
2584 CHECK_NULL);
2585 lvtt_cnt++;
2586 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2587 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2588 // Stack map is only needed by the new verifier in JDK1.5.
2589 if (parsed_stackmap_attribute) {
2590 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2591 }
2592 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2593 stackmap_data_length = code_attribute_length;
2594 parsed_stackmap_attribute = true;
2595 } else {
2596 // Skip unknown attributes
2597 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2598 }
2599 }
2600 // check method attribute length
2601 if (_need_verify) {
2602 guarantee_property(method_attribute_length == calculated_attribute_length,
2603 "Code segment has wrong length in class file %s",
2604 CHECK_NULL);
2605 }
2606 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2607 // Parse Exceptions attribute
2608 if (parsed_checked_exceptions_attribute) {
2609 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2610 CHECK_NULL);
2611 }
2612 parsed_checked_exceptions_attribute = true;
2613 checked_exceptions_start =
2614 parse_checked_exceptions(cfs,
2615 &checked_exceptions_length,
2616 method_attribute_length,
2617 CHECK_NULL);
2618 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2619 // reject multiple method parameters
2620 if (method_parameters_seen) {
2621 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2622 CHECK_NULL);
2623 }
2624 method_parameters_seen = true;
2625 method_parameters_length = cfs->get_u1_fast();
2626 const u2 real_length = (method_parameters_length * 4u) + 1u;
2627 if (method_attribute_length != real_length) {
2628 classfile_parse_error(
2629 "Invalid MethodParameters method attribute length %u in class file",
2630 method_attribute_length, CHECK_NULL);
2631 }
2632 method_parameters_data = cfs->current();
2633 cfs->skip_u2_fast(method_parameters_length);
2634 cfs->skip_u2_fast(method_parameters_length);
2635 // ignore this attribute if it cannot be reflected
2636 if (!SystemDictionary::Parameter_klass_loaded())
2637 method_parameters_length = -1;
2638 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2639 if (method_attribute_length != 0) {
2640 classfile_parse_error(
2641 "Invalid Synthetic method attribute length %u in class file %s",
2642 method_attribute_length, CHECK_NULL);
2643 }
2644 // Should we check that there hasn't already been a synthetic attribute?
2645 access_flags.set_is_synthetic();
2646 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2647 if (method_attribute_length != 0) {
2648 classfile_parse_error(
2649 "Invalid Deprecated method attribute length %u in class file %s",
2650 method_attribute_length, CHECK_NULL);
2651 }
2652 } else if (_major_version >= JAVA_1_5_VERSION) {
2653 if (method_attribute_name == vmSymbols::tag_signature()) {
2654 if (generic_signature_index != 0) {
2655 classfile_parse_error(
2656 "Multiple Signature attributes for method in class file %s",
2657 CHECK_NULL);
2658 }
2659 if (method_attribute_length != 2) {
2660 classfile_parse_error(
2661 "Invalid Signature attribute length %u in class file %s",
2662 method_attribute_length, CHECK_NULL);
2663 }
2664 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2665 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2666 if (runtime_visible_annotations != NULL) {
2667 classfile_parse_error(
2668 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2669 CHECK_NULL);
2670 }
2671 runtime_visible_annotations_length = method_attribute_length;
2672 runtime_visible_annotations = cfs->current();
2673 assert(runtime_visible_annotations != NULL, "null visible annotations");
2674 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2675 parse_annotations(cp,
2676 runtime_visible_annotations,
2677 runtime_visible_annotations_length,
2678 &parsed_annotations,
2679 _loader_data,
2680 CHECK_NULL);
2681 cfs->skip_u1_fast(runtime_visible_annotations_length);
2682 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2683 if (runtime_invisible_annotations_exists) {
2684 classfile_parse_error(
2685 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2686 CHECK_NULL);
2687 }
2688 runtime_invisible_annotations_exists = true;
2689 if (PreserveAllAnnotations) {
2690 runtime_invisible_annotations_length = method_attribute_length;
2691 runtime_invisible_annotations = cfs->current();
2692 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2693 }
2694 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2695 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2696 if (runtime_visible_parameter_annotations != NULL) {
2697 classfile_parse_error(
2698 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2699 CHECK_NULL);
2700 }
2701 runtime_visible_parameter_annotations_length = method_attribute_length;
2702 runtime_visible_parameter_annotations = cfs->current();
2703 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2704 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2705 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2706 if (runtime_invisible_parameter_annotations_exists) {
2707 classfile_parse_error(
2708 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2709 CHECK_NULL);
2710 }
2711 runtime_invisible_parameter_annotations_exists = true;
2712 if (PreserveAllAnnotations) {
2713 runtime_invisible_parameter_annotations_length = method_attribute_length;
2714 runtime_invisible_parameter_annotations = cfs->current();
2715 assert(runtime_invisible_parameter_annotations != NULL,
2716 "null invisible parameter annotations");
2717 }
2718 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2719 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2720 if (annotation_default != NULL) {
2721 classfile_parse_error(
2722 "Multiple AnnotationDefault attributes for method in class file %s",
2723 CHECK_NULL);
2724 }
2725 annotation_default_length = method_attribute_length;
2726 annotation_default = cfs->current();
2727 assert(annotation_default != NULL, "null annotation default");
2728 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2729 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2730 if (runtime_visible_type_annotations != NULL) {
2731 classfile_parse_error(
2732 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2733 CHECK_NULL);
2734 }
2735 runtime_visible_type_annotations_length = method_attribute_length;
2736 runtime_visible_type_annotations = cfs->current();
2737 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2738 // No need for the VM to parse Type annotations
2739 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2740 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2741 if (runtime_invisible_type_annotations_exists) {
2742 classfile_parse_error(
2743 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2744 CHECK_NULL);
2745 } else {
2746 runtime_invisible_type_annotations_exists = true;
2747 }
2748 if (PreserveAllAnnotations) {
2749 runtime_invisible_type_annotations_length = method_attribute_length;
2750 runtime_invisible_type_annotations = cfs->current();
2751 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2752 }
2753 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2754 } else {
2755 // Skip unknown attributes
2756 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2757 }
2758 } else {
2759 // Skip unknown attributes
2760 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2761 }
2762 }
2763
2764 if (linenumber_table != NULL) {
2765 linenumber_table->write_terminator();
2766 linenumber_table_length = linenumber_table->position();
2767 }
2768
2769 // Make sure there's at least one Code attribute in non-native/non-abstract method
2770 if (_need_verify) {
2771 guarantee_property(access_flags.is_native() ||
2772 access_flags.is_abstract() ||
2773 parsed_code_attribute,
2774 "Absent Code attribute in method that is not native or abstract in class file %s",
2775 CHECK_NULL);
2776 }
2777
2778 // All sizing information for a Method* is finally available, now create it
2779 InlineTableSizes sizes(
2780 total_lvt_length,
2781 linenumber_table_length,
2782 exception_table_length,
2783 checked_exceptions_length,
2784 method_parameters_length,
2785 generic_signature_index,
2786 runtime_visible_annotations_length +
2787 runtime_invisible_annotations_length,
2788 runtime_visible_parameter_annotations_length +
2789 runtime_invisible_parameter_annotations_length,
2790 runtime_visible_type_annotations_length +
2791 runtime_invisible_type_annotations_length,
2792 annotation_default_length,
2793 0);
2794
2795 Method* const m = Method::allocate(_loader_data,
2796 code_length,
2797 access_flags,
2798 &sizes,
2799 ConstMethod::NORMAL,
2800 CHECK_NULL);
2801
2802 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2803
2804 // Fill in information from fixed part (access_flags already set)
2805 m->set_constants(_cp);
2806 m->set_name_index(name_index);
2807 m->set_signature_index(signature_index);
2808
2809 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2810 m->constMethod()->set_result_type(rtf.type());
2811
2812 if (args_size >= 0) {
2813 m->set_size_of_parameters(args_size);
2814 } else {
2815 m->compute_size_of_parameters(THREAD);
2816 }
2817 #ifdef ASSERT
2818 if (args_size >= 0) {
2819 m->compute_size_of_parameters(THREAD);
2820 assert(args_size == m->size_of_parameters(), "");
2821 }
2822 #endif
2823
2824 // Fill in code attribute information
2825 m->set_max_stack(max_stack);
2826 m->set_max_locals(max_locals);
2827 if (stackmap_data != NULL) {
2828 m->constMethod()->copy_stackmap_data(_loader_data,
2829 (u1*)stackmap_data,
2830 stackmap_data_length,
2831 CHECK_NULL);
2832 }
2833
2834 // Copy byte codes
2835 m->set_code((u1*)code_start);
2836
2837 // Copy line number table
2838 if (linenumber_table != NULL) {
2839 memcpy(m->compressed_linenumber_table(),
2840 linenumber_table->buffer(),
2841 linenumber_table_length);
2842 }
2843
2844 // Copy exception table
2845 if (exception_table_length > 0) {
2846 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2847 m->exception_table_start(),
2848 exception_table_length * sizeof(ExceptionTableElement),
2849 sizeof(u2));
2850 }
2851
2852 // Copy method parameters
2853 if (method_parameters_length > 0) {
2854 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2855 for (int i = 0; i < method_parameters_length; i++) {
2856 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2857 method_parameters_data += 2;
2858 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2859 method_parameters_data += 2;
2860 }
2861 }
2862
2863 // Copy checked exceptions
2864 if (checked_exceptions_length > 0) {
2865 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2866 m->checked_exceptions_start(),
2867 checked_exceptions_length * sizeof(CheckedExceptionElement),
2868 sizeof(u2));
2869 }
2870
2871 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2872 if (total_lvt_length > 0) {
2873 promoted_flags->set_has_localvariable_table();
2874 copy_localvariable_table(m->constMethod(),
2875 lvt_cnt,
2876 localvariable_table_length,
2877 localvariable_table_start,
2878 lvtt_cnt,
2879 localvariable_type_table_length,
2880 localvariable_type_table_start,
2881 CHECK_NULL);
2882 }
2883
2884 if (parsed_annotations.has_any_annotations())
2885 parsed_annotations.apply_to(m);
2886
2887 // Copy annotations
2888 copy_method_annotations(m->constMethod(),
2889 runtime_visible_annotations,
2890 runtime_visible_annotations_length,
2891 runtime_invisible_annotations,
2892 runtime_invisible_annotations_length,
2893 runtime_visible_parameter_annotations,
2894 runtime_visible_parameter_annotations_length,
2895 runtime_invisible_parameter_annotations,
2896 runtime_invisible_parameter_annotations_length,
2897 runtime_visible_type_annotations,
2898 runtime_visible_type_annotations_length,
2899 runtime_invisible_type_annotations,
2900 runtime_invisible_type_annotations_length,
2901 annotation_default,
2902 annotation_default_length,
2903 CHECK_NULL);
2904
2905 if (name == vmSymbols::finalize_method_name() &&
2906 signature == vmSymbols::void_method_signature()) {
2907 if (m->is_empty_method()) {
2908 _has_empty_finalizer = true;
2909 } else {
2910 _has_finalizer = true;
2911 }
2912 }
2913 if (name == vmSymbols::object_initializer_name() &&
2914 signature == vmSymbols::void_method_signature() &&
2915 m->is_vanilla_constructor()) {
2916 _has_vanilla_constructor = true;
2917 }
2918
2919 NOT_PRODUCT(m->verify());
2920 return m;
2921 }
2922
2923
2924 // The promoted_flags parameter is used to pass relevant access_flags
2925 // from the methods back up to the containing klass. These flag values
2926 // are added to klass's access_flags.
2927 // Side-effects: populates the _methods field in the parser
2928 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2929 bool is_interface,
2930 AccessFlags* promoted_flags,
2931 bool* has_final_method,
2932 bool* declares_nonstatic_concrete_methods,
2933 TRAPS) {
2934 assert(cfs != NULL, "invariant");
2935 assert(promoted_flags != NULL, "invariant");
2936 assert(has_final_method != NULL, "invariant");
2937 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2938
2939 assert(NULL == _methods, "invariant");
2940
2941 cfs->guarantee_more(2, CHECK); // length
2942 const u2 length = cfs->get_u2_fast();
2943 if (length == 0) {
2944 _methods = Universe::the_empty_method_array();
2945 } else {
2946 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2947 length,
2948 NULL,
2949 CHECK);
2950
2951 for (int index = 0; index < length; index++) {
2952 Method* method = parse_method(cfs,
2953 is_interface,
2954 _cp,
2955 promoted_flags,
2956 CHECK);
2957
2958 if (method->is_final()) {
2959 *has_final_method = true;
2960 }
2961 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2962 // used for interface initialization, and default method inheritance analysis
2963 if (is_interface && !(*declares_nonstatic_concrete_methods)
2964 && !method->is_abstract() && !method->is_static()) {
2965 *declares_nonstatic_concrete_methods = true;
2966 }
2967 _methods->at_put(index, method);
2968 }
2969
2970 if (_need_verify && length > 1) {
2971 // Check duplicated methods
2972 ResourceMark rm(THREAD);
2973 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2974 THREAD, NameSigHash*, HASH_ROW_SIZE);
2975 initialize_hashtable(names_and_sigs);
2976 bool dup = false;
2977 const Symbol* name = NULL;
2978 const Symbol* sig = NULL;
2979 {
2980 debug_only(NoSafepointVerifier nsv;)
2981 for (int i = 0; i < length; i++) {
2982 const Method* const m = _methods->at(i);
2983 name = m->name();
2984 sig = m->signature();
2985 // If no duplicates, add name/signature in hashtable names_and_sigs.
2986 if (!put_after_lookup(name, sig, names_and_sigs)) {
2987 dup = true;
2988 break;
2989 }
2990 }
2991 }
2992 if (dup) {
2993 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2994 name->as_C_string(), sig->as_klass_external_name(), CHECK);
2995 }
2996 }
2997 }
2998 }
2999
3000 static const intArray* sort_methods(Array<Method*>* methods) {
3001 const int length = methods->length();
3002 // If JVMTI original method ordering or sharing is enabled we have to
3003 // remember the original class file ordering.
3004 // We temporarily use the vtable_index field in the Method* to store the
3005 // class file index, so we can read in after calling qsort.
3006 // Put the method ordering in the shared archive.
3007 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3008 for (int index = 0; index < length; index++) {
3009 Method* const m = methods->at(index);
3010 assert(!m->valid_vtable_index(), "vtable index should not be set");
3011 m->set_vtable_index(index);
3012 }
3013 }
3014 // Sort method array by ascending method name (for faster lookups & vtable construction)
3015 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3016 Method::sort_methods(methods);
3017
3018 intArray* method_ordering = NULL;
3019 // If JVMTI original method ordering or sharing is enabled construct int
3020 // array remembering the original ordering
3021 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3022 method_ordering = new intArray(length, length, -1);
3023 for (int index = 0; index < length; index++) {
3024 Method* const m = methods->at(index);
3025 const int old_index = m->vtable_index();
3026 assert(old_index >= 0 && old_index < length, "invalid method index");
3027 method_ordering->at_put(index, old_index);
3028 m->set_vtable_index(Method::invalid_vtable_index);
3029 }
3030 }
3031 return method_ordering;
3032 }
3033
3034 // Parse generic_signature attribute for methods and fields
3035 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3036 TRAPS) {
3037 assert(cfs != NULL, "invariant");
3038
3039 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3040 const u2 generic_signature_index = cfs->get_u2_fast();
3041 check_property(
3042 valid_symbol_at(generic_signature_index),
3043 "Invalid Signature attribute at constant pool index %u in class file %s",
3044 generic_signature_index, CHECK_0);
3045 return generic_signature_index;
3046 }
3047
3048 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3049 TRAPS) {
3050
3051 assert(cfs != NULL, "invariant");
3052
3053 cfs->guarantee_more(2, CHECK); // sourcefile_index
3054 const u2 sourcefile_index = cfs->get_u2_fast();
3055 check_property(
3056 valid_symbol_at(sourcefile_index),
3057 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3058 sourcefile_index, CHECK);
3059 set_class_sourcefile_index(sourcefile_index);
3060 }
3061
3062 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3063 int length,
3064 TRAPS) {
3065 assert(cfs != NULL, "invariant");
3066
3067 const u1* const sde_buffer = cfs->current();
3068 assert(sde_buffer != NULL, "null sde buffer");
3069
3070 // Don't bother storing it if there is no way to retrieve it
3071 if (JvmtiExport::can_get_source_debug_extension()) {
3072 assert((length+1) > length, "Overflow checking");
3073 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3074 for (int i = 0; i < length; i++) {
3075 sde[i] = sde_buffer[i];
3076 }
3077 sde[length] = '\0';
3078 set_class_sde_buffer((const char*)sde, length);
3079 }
3080 // Got utf8 string, set stream position forward
3081 cfs->skip_u1(length, CHECK);
3082 }
3083
3084
3085 // Inner classes can be static, private or protected (classic VM does this)
3086 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3087 JVM_ACC_PRIVATE | \
3088 JVM_ACC_PROTECTED | \
3089 JVM_ACC_STATIC \
3090 )
3091
3092 // Return number of classes in the inner classes attribute table
3093 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3094 const u1* const inner_classes_attribute_start,
3095 bool parsed_enclosingmethod_attribute,
3096 u2 enclosing_method_class_index,
3097 u2 enclosing_method_method_index,
3098 TRAPS) {
3099 const u1* const current_mark = cfs->current();
3100 u2 length = 0;
3101 if (inner_classes_attribute_start != NULL) {
3102 cfs->set_current(inner_classes_attribute_start);
3103 cfs->guarantee_more(2, CHECK_0); // length
3104 length = cfs->get_u2_fast();
3105 }
3106
3107 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3108 // method data:
3109 // [inner_class_info_index,
3110 // outer_class_info_index,
3111 // inner_name_index,
3112 // inner_class_access_flags,
3113 // ...
3114 // enclosing_method_class_index,
3115 // enclosing_method_method_index]
3116 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3117 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3118 _inner_classes = inner_classes;
3119
3120 int index = 0;
3121 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3122 for (int n = 0; n < length; n++) {
3123 // Inner class index
3124 const u2 inner_class_info_index = cfs->get_u2_fast();
3125 check_property(
3126 valid_klass_reference_at(inner_class_info_index),
3127 "inner_class_info_index %u has bad constant type in class file %s",
3128 inner_class_info_index, CHECK_0);
3129 // Outer class index
3130 const u2 outer_class_info_index = cfs->get_u2_fast();
3131 check_property(
3132 outer_class_info_index == 0 ||
3133 valid_klass_reference_at(outer_class_info_index),
3134 "outer_class_info_index %u has bad constant type in class file %s",
3135 outer_class_info_index, CHECK_0);
3136 // Inner class name
3137 const u2 inner_name_index = cfs->get_u2_fast();
3138 check_property(
3139 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3140 "inner_name_index %u has bad constant type in class file %s",
3141 inner_name_index, CHECK_0);
3142 if (_need_verify) {
3143 guarantee_property(inner_class_info_index != outer_class_info_index,
3144 "Class is both outer and inner class in class file %s", CHECK_0);
3145 }
3146 // Access flags
3147 jint flags;
3148 // JVM_ACC_MODULE is defined in JDK-9 and later.
3149 if (_major_version >= JAVA_9_VERSION) {
3150 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3151 } else {
3152 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3153 }
3154 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3155 // Set abstract bit for old class files for backward compatibility
3156 flags |= JVM_ACC_ABSTRACT;
3157 }
3158 verify_legal_class_modifiers(flags, CHECK_0);
3159 AccessFlags inner_access_flags(flags);
3160
3161 inner_classes->at_put(index++, inner_class_info_index);
3162 inner_classes->at_put(index++, outer_class_info_index);
3163 inner_classes->at_put(index++, inner_name_index);
3164 inner_classes->at_put(index++, inner_access_flags.as_short());
3165 }
3166
3167 // 4347400: make sure there's no duplicate entry in the classes array
3168 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3169 for(int i = 0; i < length * 4; i += 4) {
3170 for(int j = i + 4; j < length * 4; j += 4) {
3171 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3172 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3173 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3174 inner_classes->at(i+3) != inner_classes->at(j+3)),
3175 "Duplicate entry in InnerClasses in class file %s",
3176 CHECK_0);
3177 }
3178 }
3179 }
3180
3181 // Set EnclosingMethod class and method indexes.
3182 if (parsed_enclosingmethod_attribute) {
3183 inner_classes->at_put(index++, enclosing_method_class_index);
3184 inner_classes->at_put(index++, enclosing_method_method_index);
3185 }
3186 assert(index == size, "wrong size");
3187
3188 // Restore buffer's current position.
3189 cfs->set_current(current_mark);
3190
3191 return length;
3192 }
3193
3194 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3195 const u1* const nest_members_attribute_start,
3196 TRAPS) {
3197 const u1* const current_mark = cfs->current();
3198 u2 length = 0;
3199 if (nest_members_attribute_start != NULL) {
3200 cfs->set_current(nest_members_attribute_start);
3201 cfs->guarantee_more(2, CHECK_0); // length
3202 length = cfs->get_u2_fast();
3203 }
3204 const int size = length;
3205 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3206 _nest_members = nest_members;
3207
3208 int index = 0;
3209 cfs->guarantee_more(2 * length, CHECK_0);
3210 for (int n = 0; n < length; n++) {
3211 const u2 class_info_index = cfs->get_u2_fast();
3212 check_property(
3213 valid_klass_reference_at(class_info_index),
3214 "Nest member class_info_index %u has bad constant type in class file %s",
3215 class_info_index, CHECK_0);
3216 nest_members->at_put(index++, class_info_index);
3217 }
3218 assert(index == size, "wrong size");
3219
3220 // Restore buffer's current position.
3221 cfs->set_current(current_mark);
3222
3223 return length;
3224 }
3225
3226 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3227 set_class_synthetic_flag(true);
3228 }
3229
3230 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3231 assert(cfs != NULL, "invariant");
3232
3233 const u2 signature_index = cfs->get_u2(CHECK);
3234 check_property(
3235 valid_symbol_at(signature_index),
3236 "Invalid constant pool index %u in Signature attribute in class file %s",
3237 signature_index, CHECK);
3238 set_class_generic_signature_index(signature_index);
3239 }
3240
3241 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3242 ConstantPool* cp,
3243 u4 attribute_byte_length,
3244 TRAPS) {
3245 assert(cfs != NULL, "invariant");
3246 assert(cp != NULL, "invariant");
3247
3248 const u1* const current_start = cfs->current();
3249
3250 guarantee_property(attribute_byte_length >= sizeof(u2),
3251 "Invalid BootstrapMethods attribute length %u in class file %s",
3252 attribute_byte_length,
3253 CHECK);
3254
3255 cfs->guarantee_more(attribute_byte_length, CHECK);
3256
3257 const int attribute_array_length = cfs->get_u2_fast();
3258
3259 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3260 "Short length on BootstrapMethods in class file %s",
3261 CHECK);
3262
3263
3264 // The attribute contains a counted array of counted tuples of shorts,
3265 // represending bootstrap specifiers:
3266 // length*{bootstrap_method_index, argument_count*{argument_index}}
3267 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3268 // operand_count = number of shorts in attr, except for leading length
3269
3270 // The attribute is copied into a short[] array.
3271 // The array begins with a series of short[2] pairs, one for each tuple.
3272 const int index_size = (attribute_array_length * 2);
3273
3274 Array<u2>* const operands =
3275 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3276
3277 // Eagerly assign operands so they will be deallocated with the constant
3278 // pool if there is an error.
3279 cp->set_operands(operands);
3280
3281 int operand_fill_index = index_size;
3282 const int cp_size = cp->length();
3283
3284 for (int n = 0; n < attribute_array_length; n++) {
3285 // Store a 32-bit offset into the header of the operand array.
3286 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3287
3288 // Read a bootstrap specifier.
3289 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3290 const u2 bootstrap_method_index = cfs->get_u2_fast();
3291 const u2 argument_count = cfs->get_u2_fast();
3292 check_property(
3293 valid_cp_range(bootstrap_method_index, cp_size) &&
3294 cp->tag_at(bootstrap_method_index).is_method_handle(),
3295 "bootstrap_method_index %u has bad constant type in class file %s",
3296 bootstrap_method_index,
3297 CHECK);
3298
3299 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3300 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3301 CHECK);
3302
3303 operands->at_put(operand_fill_index++, bootstrap_method_index);
3304 operands->at_put(operand_fill_index++, argument_count);
3305
3306 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3307 for (int j = 0; j < argument_count; j++) {
3308 const u2 argument_index = cfs->get_u2_fast();
3309 check_property(
3310 valid_cp_range(argument_index, cp_size) &&
3311 cp->tag_at(argument_index).is_loadable_constant(),
3312 "argument_index %u has bad constant type in class file %s",
3313 argument_index,
3314 CHECK);
3315 operands->at_put(operand_fill_index++, argument_index);
3316 }
3317 }
3318 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3319 "Bad length on BootstrapMethods in class file %s",
3320 CHECK);
3321 }
3322
3323 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3324 ConstantPool* cp,
3325 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3326 TRAPS) {
3327 assert(cfs != NULL, "invariant");
3328 assert(cp != NULL, "invariant");
3329 assert(parsed_annotations != NULL, "invariant");
3330
3331 // Set inner classes attribute to default sentinel
3332 _inner_classes = Universe::the_empty_short_array();
3333 // Set nest members attribute to default sentinel
3334 _nest_members = Universe::the_empty_short_array();
3335 cfs->guarantee_more(2, CHECK); // attributes_count
3336 u2 attributes_count = cfs->get_u2_fast();
3337 bool parsed_sourcefile_attribute = false;
3338 bool parsed_innerclasses_attribute = false;
3339 bool parsed_nest_members_attribute = false;
3340 bool parsed_nest_host_attribute = false;
3341 bool parsed_enclosingmethod_attribute = false;
3342 bool parsed_bootstrap_methods_attribute = false;
3343 const u1* runtime_visible_annotations = NULL;
3344 int runtime_visible_annotations_length = 0;
3345 const u1* runtime_invisible_annotations = NULL;
3346 int runtime_invisible_annotations_length = 0;
3347 const u1* runtime_visible_type_annotations = NULL;
3348 int runtime_visible_type_annotations_length = 0;
3349 const u1* runtime_invisible_type_annotations = NULL;
3350 int runtime_invisible_type_annotations_length = 0;
3351 bool runtime_invisible_type_annotations_exists = false;
3352 bool runtime_invisible_annotations_exists = false;
3353 bool parsed_source_debug_ext_annotations_exist = false;
3354 const u1* inner_classes_attribute_start = NULL;
3355 u4 inner_classes_attribute_length = 0;
3356 u2 enclosing_method_class_index = 0;
3357 u2 enclosing_method_method_index = 0;
3358 const u1* nest_members_attribute_start = NULL;
3359 u4 nest_members_attribute_length = 0;
3360
3361 // Iterate over attributes
3362 while (attributes_count--) {
3363 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3364 const u2 attribute_name_index = cfs->get_u2_fast();
3365 const u4 attribute_length = cfs->get_u4_fast();
3366 check_property(
3367 valid_symbol_at(attribute_name_index),
3368 "Attribute name has bad constant pool index %u in class file %s",
3369 attribute_name_index, CHECK);
3370 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3371 if (tag == vmSymbols::tag_source_file()) {
3372 // Check for SourceFile tag
3373 if (_need_verify) {
3374 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3375 }
3376 if (parsed_sourcefile_attribute) {
3377 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3378 } else {
3379 parsed_sourcefile_attribute = true;
3380 }
3381 parse_classfile_sourcefile_attribute(cfs, CHECK);
3382 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3383 // Check for SourceDebugExtension tag
3384 if (parsed_source_debug_ext_annotations_exist) {
3385 classfile_parse_error(
3386 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3387 }
3388 parsed_source_debug_ext_annotations_exist = true;
3389 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3390 } else if (tag == vmSymbols::tag_inner_classes()) {
3391 // Check for InnerClasses tag
3392 if (parsed_innerclasses_attribute) {
3393 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3394 } else {
3395 parsed_innerclasses_attribute = true;
3396 }
3397 inner_classes_attribute_start = cfs->current();
3398 inner_classes_attribute_length = attribute_length;
3399 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3400 } else if (tag == vmSymbols::tag_synthetic()) {
3401 // Check for Synthetic tag
3402 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3403 if (attribute_length != 0) {
3404 classfile_parse_error(
3405 "Invalid Synthetic classfile attribute length %u in class file %s",
3406 attribute_length, CHECK);
3407 }
3408 parse_classfile_synthetic_attribute(CHECK);
3409 } else if (tag == vmSymbols::tag_deprecated()) {
3410 // Check for Deprecatd tag - 4276120
3411 if (attribute_length != 0) {
3412 classfile_parse_error(
3413 "Invalid Deprecated classfile attribute length %u in class file %s",
3414 attribute_length, CHECK);
3415 }
3416 } else if (_major_version >= JAVA_1_5_VERSION) {
3417 if (tag == vmSymbols::tag_signature()) {
3418 if (_generic_signature_index != 0) {
3419 classfile_parse_error(
3420 "Multiple Signature attributes in class file %s", CHECK);
3421 }
3422 if (attribute_length != 2) {
3423 classfile_parse_error(
3424 "Wrong Signature attribute length %u in class file %s",
3425 attribute_length, CHECK);
3426 }
3427 parse_classfile_signature_attribute(cfs, CHECK);
3428 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3429 if (runtime_visible_annotations != NULL) {
3430 classfile_parse_error(
3431 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3432 }
3433 runtime_visible_annotations_length = attribute_length;
3434 runtime_visible_annotations = cfs->current();
3435 assert(runtime_visible_annotations != NULL, "null visible annotations");
3436 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3437 parse_annotations(cp,
3438 runtime_visible_annotations,
3439 runtime_visible_annotations_length,
3440 parsed_annotations,
3441 _loader_data,
3442 CHECK);
3443 cfs->skip_u1_fast(runtime_visible_annotations_length);
3444 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3445 if (runtime_invisible_annotations_exists) {
3446 classfile_parse_error(
3447 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3448 }
3449 runtime_invisible_annotations_exists = true;
3450 if (PreserveAllAnnotations) {
3451 runtime_invisible_annotations_length = attribute_length;
3452 runtime_invisible_annotations = cfs->current();
3453 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3454 }
3455 cfs->skip_u1(attribute_length, CHECK);
3456 } else if (tag == vmSymbols::tag_enclosing_method()) {
3457 if (parsed_enclosingmethod_attribute) {
3458 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3459 } else {
3460 parsed_enclosingmethod_attribute = true;
3461 }
3462 guarantee_property(attribute_length == 4,
3463 "Wrong EnclosingMethod attribute length %u in class file %s",
3464 attribute_length, CHECK);
3465 cfs->guarantee_more(4, CHECK); // class_index, method_index
3466 enclosing_method_class_index = cfs->get_u2_fast();
3467 enclosing_method_method_index = cfs->get_u2_fast();
3468 if (enclosing_method_class_index == 0) {
3469 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3470 }
3471 // Validate the constant pool indices and types
3472 check_property(valid_klass_reference_at(enclosing_method_class_index),
3473 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3474 if (enclosing_method_method_index != 0 &&
3475 (!cp->is_within_bounds(enclosing_method_method_index) ||
3476 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3477 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3478 }
3479 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3480 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3481 if (parsed_bootstrap_methods_attribute) {
3482 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3483 }
3484 parsed_bootstrap_methods_attribute = true;
3485 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3486 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3487 if (runtime_visible_type_annotations != NULL) {
3488 classfile_parse_error(
3489 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3490 }
3491 runtime_visible_type_annotations_length = attribute_length;
3492 runtime_visible_type_annotations = cfs->current();
3493 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3494 // No need for the VM to parse Type annotations
3495 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3496 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3497 if (runtime_invisible_type_annotations_exists) {
3498 classfile_parse_error(
3499 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3500 } else {
3501 runtime_invisible_type_annotations_exists = true;
3502 }
3503 if (PreserveAllAnnotations) {
3504 runtime_invisible_type_annotations_length = attribute_length;
3505 runtime_invisible_type_annotations = cfs->current();
3506 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3507 }
3508 cfs->skip_u1(attribute_length, CHECK);
3509 } else if (_major_version >= JAVA_11_VERSION) {
3510 if (tag == vmSymbols::tag_nest_members()) {
3511 // Check for NestMembers tag
3512 if (parsed_nest_members_attribute) {
3513 classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3514 } else {
3515 parsed_nest_members_attribute = true;
3516 }
3517 if (parsed_nest_host_attribute) {
3518 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3519 }
3520 nest_members_attribute_start = cfs->current();
3521 nest_members_attribute_length = attribute_length;
3522 cfs->skip_u1(nest_members_attribute_length, CHECK);
3523 } else if (tag == vmSymbols::tag_nest_host()) {
3524 if (parsed_nest_host_attribute) {
3525 classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3526 } else {
3527 parsed_nest_host_attribute = true;
3528 }
3529 if (parsed_nest_members_attribute) {
3530 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3531 }
3532 if (_need_verify) {
3533 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3534 }
3535 cfs->guarantee_more(2, CHECK);
3536 u2 class_info_index = cfs->get_u2_fast();
3537 check_property(
3538 valid_klass_reference_at(class_info_index),
3539 "Nest-host class_info_index %u has bad constant type in class file %s",
3540 class_info_index, CHECK);
3541 _nest_host = class_info_index;
3542 } else {
3543 // Unknown attribute
3544 cfs->skip_u1(attribute_length, CHECK);
3545 }
3546 } else {
3547 // Unknown attribute
3548 cfs->skip_u1(attribute_length, CHECK);
3549 }
3550 } else {
3551 // Unknown attribute
3552 cfs->skip_u1(attribute_length, CHECK);
3553 }
3554 }
3555 _class_annotations = assemble_annotations(runtime_visible_annotations,
3556 runtime_visible_annotations_length,
3557 runtime_invisible_annotations,
3558 runtime_invisible_annotations_length,
3559 CHECK);
3560 _class_type_annotations = assemble_annotations(runtime_visible_type_annotations,
3561 runtime_visible_type_annotations_length,
3562 runtime_invisible_type_annotations,
3563 runtime_invisible_type_annotations_length,
3564 CHECK);
3565
3566 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3567 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3568 cfs,
3569 inner_classes_attribute_start,
3570 parsed_innerclasses_attribute,
3571 enclosing_method_class_index,
3572 enclosing_method_method_index,
3573 CHECK);
3574 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3575 guarantee_property(
3576 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3577 "Wrong InnerClasses attribute length in class file %s", CHECK);
3578 }
3579 }
3580
3581 if (parsed_nest_members_attribute) {
3582 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3583 cfs,
3584 nest_members_attribute_start,
3585 CHECK);
3586 if (_need_verify) {
3587 guarantee_property(
3588 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3589 "Wrong NestMembers attribute length in class file %s", CHECK);
3590 }
3591 }
3592
3593 if (_max_bootstrap_specifier_index >= 0) {
3594 guarantee_property(parsed_bootstrap_methods_attribute,
3595 "Missing BootstrapMethods attribute in class file %s", CHECK);
3596 }
3597 }
3598
3599 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3600 assert(k != NULL, "invariant");
3601
3602 if (_synthetic_flag)
3603 k->set_is_synthetic();
3604 if (_sourcefile_index != 0) {
3605 k->set_source_file_name_index(_sourcefile_index);
3606 }
3607 if (_generic_signature_index != 0) {
3608 k->set_generic_signature_index(_generic_signature_index);
3609 }
3610 if (_sde_buffer != NULL) {
3611 k->set_source_debug_extension(_sde_buffer, _sde_length);
3612 }
3613 }
3614
3615 // Create the Annotations object that will
3616 // hold the annotations array for the Klass.
3617 void ClassFileParser::create_combined_annotations(TRAPS) {
3618 if (_class_annotations == NULL &&
3619 _class_type_annotations == NULL &&
3620 _fields_annotations == NULL &&
3621 _fields_type_annotations == NULL) {
3622 // Don't create the Annotations object unnecessarily.
3623 return;
3624 }
3625
3626 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3627 annotations->set_class_annotations(_class_annotations);
3628 annotations->set_class_type_annotations(_class_type_annotations);
3629 annotations->set_fields_annotations(_fields_annotations);
3630 annotations->set_fields_type_annotations(_fields_type_annotations);
3631
3632 // This is the Annotations object that will be
3633 // assigned to InstanceKlass being constructed.
3634 _combined_annotations = annotations;
3635
3636 // The annotations arrays below has been transfered the
3637 // _combined_annotations so these fields can now be cleared.
3638 _class_annotations = NULL;
3639 _class_type_annotations = NULL;
3640 _fields_annotations = NULL;
3641 _fields_type_annotations = NULL;
3642 }
3643
3644 // Transfer ownership of metadata allocated to the InstanceKlass.
3645 void ClassFileParser::apply_parsed_class_metadata(
3646 InstanceKlass* this_klass,
3647 int java_fields_count, TRAPS) {
3648 assert(this_klass != NULL, "invariant");
3649
3650 _cp->set_pool_holder(this_klass);
3651 this_klass->set_constants(_cp);
3652 this_klass->set_fields(_fields, java_fields_count);
3653 this_klass->set_methods(_methods);
3654 this_klass->set_inner_classes(_inner_classes);
3655 this_klass->set_nest_members(_nest_members);
3656 this_klass->set_nest_host_index(_nest_host);
3657 this_klass->set_local_interfaces(_local_interfaces);
3658 this_klass->set_annotations(_combined_annotations);
3659 // Delay the setting of _transitive_interfaces until after initialize_supers() in
3660 // fill_instance_klass(). It is because the _transitive_interfaces may be shared with
3661 // its _super. If an OOM occurs while loading the current klass, its _super field
3662 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3663 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3664 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3665
3666 // Clear out these fields so they don't get deallocated by the destructor
3667 clear_class_metadata();
3668 }
3669
3670 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3671 int runtime_visible_annotations_length,
3672 const u1* const runtime_invisible_annotations,
3673 int runtime_invisible_annotations_length,
3674 TRAPS) {
3675 AnnotationArray* annotations = NULL;
3676 if (runtime_visible_annotations != NULL ||
3677 runtime_invisible_annotations != NULL) {
3678 annotations = MetadataFactory::new_array<u1>(_loader_data,
3679 runtime_visible_annotations_length +
3680 runtime_invisible_annotations_length,
3681 CHECK_(annotations));
3682 if (runtime_visible_annotations != NULL) {
3683 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3684 annotations->at_put(i, runtime_visible_annotations[i]);
3685 }
3686 }
3687 if (runtime_invisible_annotations != NULL) {
3688 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3689 int append = runtime_visible_annotations_length+i;
3690 annotations->at_put(append, runtime_invisible_annotations[i]);
3691 }
3692 }
3693 }
3694 return annotations;
3695 }
3696
3697 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3698 const int super_class_index,
3699 const bool need_verify,
3700 TRAPS) {
3701 assert(cp != NULL, "invariant");
3702 const InstanceKlass* super_klass = NULL;
3703
3704 if (super_class_index == 0) {
3705 check_property(_class_name == vmSymbols::java_lang_Object(),
3706 "Invalid superclass index %u in class file %s",
3707 super_class_index,
3708 CHECK_NULL);
3709 } else {
3710 check_property(valid_klass_reference_at(super_class_index),
3711 "Invalid superclass index %u in class file %s",
3712 super_class_index,
3713 CHECK_NULL);
3714 // The class name should be legal because it is checked when parsing constant pool.
3715 // However, make sure it is not an array type.
3716 bool is_array = false;
3717 if (cp->tag_at(super_class_index).is_klass()) {
3718 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3719 if (need_verify)
3720 is_array = super_klass->is_array_klass();
3721 } else if (need_verify) {
3722 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3723 }
3724 if (need_verify) {
3725 guarantee_property(!is_array,
3726 "Bad superclass name in class file %s", CHECK_NULL);
3727 }
3728 }
3729 return super_klass;
3730 }
3731
3732 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3733 unsigned int nonstatic_oop_map_count,
3734 int first_nonstatic_oop_offset) {
3735
3736 unsigned int map_count =
3737 NULL == super ? 0 : super->nonstatic_oop_map_count();
3738 if (nonstatic_oop_map_count > 0) {
3739 // We have oops to add to map
3740 if (map_count == 0) {
3741 map_count = nonstatic_oop_map_count;
3742 }
3743 else {
3744 // Check whether we should add a new map block or whether the last one can
3745 // be extended
3746 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3747 const OopMapBlock* const last_map = first_map + map_count - 1;
3748
3749 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3750 if (next_offset == first_nonstatic_oop_offset) {
3751 // There is no gap bettwen superklass's last oop field and first
3752 // local oop field, merge maps.
3753 nonstatic_oop_map_count -= 1;
3754 }
3755 else {
3756 // Superklass didn't end with a oop field, add extra maps
3757 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3758 }
3759 map_count += nonstatic_oop_map_count;
3760 }
3761 }
3762 return map_count;
3763 }
3764
3765 #ifndef PRODUCT
3766 static void print_field_layout(const Symbol* name,
3767 Array<u2>* fields,
3768 const constantPoolHandle& cp,
3769 int instance_size,
3770 int instance_fields_start,
3771 int instance_fields_end,
3772 int static_fields_end) {
3773
3774 assert(name != NULL, "invariant");
3775
3776 tty->print("%s: field layout\n", name->as_klass_external_name());
3777 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3778 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3779 if (!fs.access_flags().is_static()) {
3780 tty->print(" @%3d \"%s\" %s\n",
3781 fs.offset(),
3782 fs.name()->as_klass_external_name(),
3783 fs.signature()->as_klass_external_name());
3784 }
3785 }
3786 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3787 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3788 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3789 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3790 if (fs.access_flags().is_static()) {
3791 tty->print(" @%3d \"%s\" %s\n",
3792 fs.offset(),
3793 fs.name()->as_klass_external_name(),
3794 fs.signature()->as_klass_external_name());
3795 }
3796 }
3797 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3798 tty->print("\n");
3799 }
3800 #endif
3801
3802 // Values needed for oopmap and InstanceKlass creation
3803 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3804 public:
3805 int* nonstatic_oop_offsets;
3806 unsigned int* nonstatic_oop_counts;
3807 unsigned int nonstatic_oop_map_count;
3808 unsigned int total_oop_map_count;
3809 int instance_size;
3810 int nonstatic_field_size;
3811 int static_field_size;
3812 bool has_nonstatic_fields;
3813 };
3814
3815 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3816 void ClassFileParser::layout_fields(ConstantPool* cp,
3817 const FieldAllocationCount* fac,
3818 const ClassAnnotationCollector* parsed_annotations,
3819 FieldLayoutInfo* info,
3820 TRAPS) {
3821
3822 assert(cp != NULL, "invariant");
3823
3824 // Field size and offset computation
3825 int nonstatic_field_size = _super_klass == NULL ? 0 :
3826 _super_klass->nonstatic_field_size();
3827
3828 // Count the contended fields by type.
3829 //
3830 // We ignore static fields, because @Contended is not supported for them.
3831 // The layout code below will also ignore the static fields.
3832 int nonstatic_contended_count = 0;
3833 FieldAllocationCount fac_contended;
3834 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3835 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3836 if (fs.is_contended()) {
3837 fac_contended.count[atype]++;
3838 if (!fs.access_flags().is_static()) {
3839 nonstatic_contended_count++;
3840 }
3841 }
3842 }
3843
3844
3845 // Calculate the starting byte offsets
3846 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3847 int next_static_double_offset = next_static_oop_offset +
3848 ((fac->count[STATIC_OOP]) * heapOopSize);
3849 if (fac->count[STATIC_DOUBLE]) {
3850 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3851 }
3852
3853 int next_static_word_offset = next_static_double_offset +
3854 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3855 int next_static_short_offset = next_static_word_offset +
3856 ((fac->count[STATIC_WORD]) * BytesPerInt);
3857 int next_static_byte_offset = next_static_short_offset +
3858 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3859
3860 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3861 nonstatic_field_size * heapOopSize;
3862
3863 int next_nonstatic_field_offset = nonstatic_fields_start;
3864
3865 const bool is_contended_class = parsed_annotations->is_contended();
3866
3867 // Class is contended, pad before all the fields
3868 if (is_contended_class) {
3869 next_nonstatic_field_offset += ContendedPaddingWidth;
3870 }
3871
3872 // Compute the non-contended fields count.
3873 // The packing code below relies on these counts to determine if some field
3874 // can be squeezed into the alignment gap. Contended fields are obviously
3875 // exempt from that.
3876 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3877 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3878 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3879 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3880 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3881
3882 // Total non-static fields count, including every contended field
3883 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3884 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3885 fac->count[NONSTATIC_OOP];
3886
3887 const bool super_has_nonstatic_fields =
3888 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3889 const bool has_nonstatic_fields =
3890 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3891
3892
3893 // Prepare list of oops for oop map generation.
3894 //
3895 // "offset" and "count" lists are describing the set of contiguous oop
3896 // regions. offset[i] is the start of the i-th region, which then has
3897 // count[i] oops following. Before we know how many regions are required,
3898 // we pessimistically allocate the maps to fit all the oops into the
3899 // distinct regions.
3900 //
3901 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3902 // to figure out if we still need to do this.
3903 unsigned int nonstatic_oop_map_count = 0;
3904 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3905
3906 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3907 THREAD, int, max_nonstatic_oop_maps);
3908 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3909 THREAD, unsigned int, max_nonstatic_oop_maps);
3910
3911 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3912
3913 bool compact_fields = CompactFields;
3914 int allocation_style = FieldsAllocationStyle;
3915 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3916 assert(false, "0 <= FieldsAllocationStyle <= 2");
3917 allocation_style = 1; // Optimistic
3918 }
3919
3920 // The next classes have predefined hard-coded fields offsets
3921 // (see in JavaClasses::compute_hard_coded_offsets()).
3922 // Use default fields allocation order for them.
3923 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3924 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3925 _class_name == vmSymbols::java_lang_Class() ||
3926 _class_name == vmSymbols::java_lang_ClassLoader() ||
3927 _class_name == vmSymbols::java_lang_ref_Reference() ||
3928 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3929 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3930 _class_name == vmSymbols::java_lang_String() ||
3931 _class_name == vmSymbols::java_lang_Throwable() ||
3932 _class_name == vmSymbols::java_lang_Boolean() ||
3933 _class_name == vmSymbols::java_lang_Character() ||
3934 _class_name == vmSymbols::java_lang_Float() ||
3935 _class_name == vmSymbols::java_lang_Double() ||
3936 _class_name == vmSymbols::java_lang_Byte() ||
3937 _class_name == vmSymbols::java_lang_Short() ||
3938 _class_name == vmSymbols::java_lang_Integer() ||
3939 _class_name == vmSymbols::java_lang_Long())) {
3940 allocation_style = 0; // Allocate oops first
3941 compact_fields = false; // Don't compact fields
3942 }
3943
3944 int next_nonstatic_oop_offset = 0;
3945 int next_nonstatic_double_offset = 0;
3946
3947 // Rearrange fields for a given allocation style
3948 if( allocation_style == 0 ) {
3949 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3950 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3951 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3952 (nonstatic_oop_count * heapOopSize);
3953 } else if( allocation_style == 1 ) {
3954 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3955 next_nonstatic_double_offset = next_nonstatic_field_offset;
3956 } else if( allocation_style == 2 ) {
3957 // Fields allocation: oops fields in super and sub classes are together.
3958 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3959 _super_klass->nonstatic_oop_map_size() > 0 ) {
3960 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3961 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3962 const OopMapBlock* const last_map = first_map + map_count - 1;
3963 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3964 if (next_offset == next_nonstatic_field_offset) {
3965 allocation_style = 0; // allocate oops first
3966 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3967 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3968 (nonstatic_oop_count * heapOopSize);
3969 }
3970 }
3971 if( allocation_style == 2 ) {
3972 allocation_style = 1; // allocate oops last
3973 next_nonstatic_double_offset = next_nonstatic_field_offset;
3974 }
3975 } else {
3976 ShouldNotReachHere();
3977 }
3978
3979 int nonstatic_oop_space_count = 0;
3980 int nonstatic_word_space_count = 0;
3981 int nonstatic_short_space_count = 0;
3982 int nonstatic_byte_space_count = 0;
3983 int nonstatic_oop_space_offset = 0;
3984 int nonstatic_word_space_offset = 0;
3985 int nonstatic_short_space_offset = 0;
3986 int nonstatic_byte_space_offset = 0;
3987
3988 // Try to squeeze some of the fields into the gaps due to
3989 // long/double alignment.
3990 if (nonstatic_double_count > 0) {
3991 int offset = next_nonstatic_double_offset;
3992 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
3993 if (compact_fields && offset != next_nonstatic_double_offset) {
3994 // Allocate available fields into the gap before double field.
3995 int length = next_nonstatic_double_offset - offset;
3996 assert(length == BytesPerInt, "");
3997 nonstatic_word_space_offset = offset;
3998 if (nonstatic_word_count > 0) {
3999 nonstatic_word_count -= 1;
4000 nonstatic_word_space_count = 1; // Only one will fit
4001 length -= BytesPerInt;
4002 offset += BytesPerInt;
4003 }
4004 nonstatic_short_space_offset = offset;
4005 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4006 nonstatic_short_count -= 1;
4007 nonstatic_short_space_count += 1;
4008 length -= BytesPerShort;
4009 offset += BytesPerShort;
4010 }
4011 nonstatic_byte_space_offset = offset;
4012 while (length > 0 && nonstatic_byte_count > 0) {
4013 nonstatic_byte_count -= 1;
4014 nonstatic_byte_space_count += 1;
4015 length -= 1;
4016 }
4017 // Allocate oop field in the gap if there are no other fields for that.
4018 nonstatic_oop_space_offset = offset;
4019 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4020 allocation_style != 0) { // when oop fields not first
4021 nonstatic_oop_count -= 1;
4022 nonstatic_oop_space_count = 1; // Only one will fit
4023 length -= heapOopSize;
4024 offset += heapOopSize;
4025 }
4026 }
4027 }
4028
4029 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4030 (nonstatic_double_count * BytesPerLong);
4031 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4032 (nonstatic_word_count * BytesPerInt);
4033 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4034 (nonstatic_short_count * BytesPerShort);
4035 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4036 nonstatic_byte_count;
4037
4038 // let oops jump before padding with this allocation style
4039 if( allocation_style == 1 ) {
4040 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4041 if( nonstatic_oop_count > 0 ) {
4042 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4043 }
4044 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4045 }
4046
4047 // Iterate over fields again and compute correct offsets.
4048 // The field allocation type was temporarily stored in the offset slot.
4049 // oop fields are located before non-oop fields (static and non-static).
4050 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4051
4052 // skip already laid out fields
4053 if (fs.is_offset_set()) continue;
4054
4055 // contended instance fields are handled below
4056 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4057
4058 int real_offset = 0;
4059 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4060
4061 // pack the rest of the fields
4062 switch (atype) {
4063 case STATIC_OOP:
4064 real_offset = next_static_oop_offset;
4065 next_static_oop_offset += heapOopSize;
4066 break;
4067 case STATIC_BYTE:
4068 real_offset = next_static_byte_offset;
4069 next_static_byte_offset += 1;
4070 break;
4071 case STATIC_SHORT:
4072 real_offset = next_static_short_offset;
4073 next_static_short_offset += BytesPerShort;
4074 break;
4075 case STATIC_WORD:
4076 real_offset = next_static_word_offset;
4077 next_static_word_offset += BytesPerInt;
4078 break;
4079 case STATIC_DOUBLE:
4080 real_offset = next_static_double_offset;
4081 next_static_double_offset += BytesPerLong;
4082 break;
4083 case NONSTATIC_OOP:
4084 if( nonstatic_oop_space_count > 0 ) {
4085 real_offset = nonstatic_oop_space_offset;
4086 nonstatic_oop_space_offset += heapOopSize;
4087 nonstatic_oop_space_count -= 1;
4088 } else {
4089 real_offset = next_nonstatic_oop_offset;
4090 next_nonstatic_oop_offset += heapOopSize;
4091 }
4092
4093 // Record this oop in the oop maps
4094 if( nonstatic_oop_map_count > 0 &&
4095 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4096 real_offset -
4097 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4098 heapOopSize ) {
4099 // This oop is adjacent to the previous one, add to current oop map
4100 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4101 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4102 } else {
4103 // This oop is not adjacent to the previous one, create new oop map
4104 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4105 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4106 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4107 nonstatic_oop_map_count += 1;
4108 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4109 first_nonstatic_oop_offset = real_offset;
4110 }
4111 }
4112 break;
4113 case NONSTATIC_BYTE:
4114 if( nonstatic_byte_space_count > 0 ) {
4115 real_offset = nonstatic_byte_space_offset;
4116 nonstatic_byte_space_offset += 1;
4117 nonstatic_byte_space_count -= 1;
4118 } else {
4119 real_offset = next_nonstatic_byte_offset;
4120 next_nonstatic_byte_offset += 1;
4121 }
4122 break;
4123 case NONSTATIC_SHORT:
4124 if( nonstatic_short_space_count > 0 ) {
4125 real_offset = nonstatic_short_space_offset;
4126 nonstatic_short_space_offset += BytesPerShort;
4127 nonstatic_short_space_count -= 1;
4128 } else {
4129 real_offset = next_nonstatic_short_offset;
4130 next_nonstatic_short_offset += BytesPerShort;
4131 }
4132 break;
4133 case NONSTATIC_WORD:
4134 if( nonstatic_word_space_count > 0 ) {
4135 real_offset = nonstatic_word_space_offset;
4136 nonstatic_word_space_offset += BytesPerInt;
4137 nonstatic_word_space_count -= 1;
4138 } else {
4139 real_offset = next_nonstatic_word_offset;
4140 next_nonstatic_word_offset += BytesPerInt;
4141 }
4142 break;
4143 case NONSTATIC_DOUBLE:
4144 real_offset = next_nonstatic_double_offset;
4145 next_nonstatic_double_offset += BytesPerLong;
4146 break;
4147 default:
4148 ShouldNotReachHere();
4149 }
4150 fs.set_offset(real_offset);
4151 }
4152
4153
4154 // Handle the contended cases.
4155 //
4156 // Each contended field should not intersect the cache line with another contended field.
4157 // In the absence of alignment information, we end up with pessimistically separating
4158 // the fields with full-width padding.
4159 //
4160 // Additionally, this should not break alignment for the fields, so we round the alignment up
4161 // for each field.
4162 if (nonstatic_contended_count > 0) {
4163
4164 // if there is at least one contended field, we need to have pre-padding for them
4165 next_nonstatic_padded_offset += ContendedPaddingWidth;
4166
4167 // collect all contended groups
4168 ResourceBitMap bm(cp->size());
4169 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4170 // skip already laid out fields
4171 if (fs.is_offset_set()) continue;
4172
4173 if (fs.is_contended()) {
4174 bm.set_bit(fs.contended_group());
4175 }
4176 }
4177
4178 int current_group = -1;
4179 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4180
4181 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4182
4183 // skip already laid out fields
4184 if (fs.is_offset_set()) continue;
4185
4186 // skip non-contended fields and fields from different group
4187 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4188
4189 // handle statics below
4190 if (fs.access_flags().is_static()) continue;
4191
4192 int real_offset = 0;
4193 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4194
4195 switch (atype) {
4196 case NONSTATIC_BYTE:
4197 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4198 real_offset = next_nonstatic_padded_offset;
4199 next_nonstatic_padded_offset += 1;
4200 break;
4201
4202 case NONSTATIC_SHORT:
4203 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4204 real_offset = next_nonstatic_padded_offset;
4205 next_nonstatic_padded_offset += BytesPerShort;
4206 break;
4207
4208 case NONSTATIC_WORD:
4209 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4210 real_offset = next_nonstatic_padded_offset;
4211 next_nonstatic_padded_offset += BytesPerInt;
4212 break;
4213
4214 case NONSTATIC_DOUBLE:
4215 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4216 real_offset = next_nonstatic_padded_offset;
4217 next_nonstatic_padded_offset += BytesPerLong;
4218 break;
4219
4220 case NONSTATIC_OOP:
4221 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4222 real_offset = next_nonstatic_padded_offset;
4223 next_nonstatic_padded_offset += heapOopSize;
4224
4225 // Record this oop in the oop maps
4226 if( nonstatic_oop_map_count > 0 &&
4227 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4228 real_offset -
4229 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4230 heapOopSize ) {
4231 // This oop is adjacent to the previous one, add to current oop map
4232 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4233 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4234 } else {
4235 // This oop is not adjacent to the previous one, create new oop map
4236 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4237 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4238 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4239 nonstatic_oop_map_count += 1;
4240 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4241 first_nonstatic_oop_offset = real_offset;
4242 }
4243 }
4244 break;
4245
4246 default:
4247 ShouldNotReachHere();
4248 }
4249
4250 if (fs.contended_group() == 0) {
4251 // Contended group defines the equivalence class over the fields:
4252 // the fields within the same contended group are not inter-padded.
4253 // The only exception is default group, which does not incur the
4254 // equivalence, and so requires intra-padding.
4255 next_nonstatic_padded_offset += ContendedPaddingWidth;
4256 }
4257
4258 fs.set_offset(real_offset);
4259 } // for
4260
4261 // Start laying out the next group.
4262 // Note that this will effectively pad the last group in the back;
4263 // this is expected to alleviate memory contention effects for
4264 // subclass fields and/or adjacent object.
4265 // If this was the default group, the padding is already in place.
4266 if (current_group != 0) {
4267 next_nonstatic_padded_offset += ContendedPaddingWidth;
4268 }
4269 }
4270
4271 // handle static fields
4272 }
4273
4274 // Entire class is contended, pad in the back.
4275 // This helps to alleviate memory contention effects for subclass fields
4276 // and/or adjacent object.
4277 if (is_contended_class) {
4278 next_nonstatic_padded_offset += ContendedPaddingWidth;
4279 }
4280
4281 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4282
4283 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, heapOopSize);
4284 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4285 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4286
4287 int static_field_size = (static_fields_end -
4288 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4289 nonstatic_field_size = nonstatic_field_size +
4290 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4291
4292 int instance_size = align_object_size(instance_end / wordSize);
4293
4294 assert(instance_size == align_object_size(align_up(
4295 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4296 wordSize) / wordSize), "consistent layout helper value");
4297
4298 // Invariant: nonstatic_field end/start should only change if there are
4299 // nonstatic fields in the class, or if the class is contended. We compare
4300 // against the non-aligned value, so that end alignment will not fail the
4301 // assert without actually having the fields.
4302 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4303 is_contended_class ||
4304 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4305
4306 // Number of non-static oop map blocks allocated at end of klass.
4307 const unsigned int total_oop_map_count =
4308 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4309 first_nonstatic_oop_offset);
4310
4311 #ifndef PRODUCT
4312 if (PrintFieldLayout) {
4313 print_field_layout(_class_name,
4314 _fields,
4315 cp,
4316 instance_size,
4317 nonstatic_fields_start,
4318 nonstatic_fields_end,
4319 static_fields_end);
4320 }
4321
4322 #endif
4323 // Pass back information needed for InstanceKlass creation
4324 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4325 info->nonstatic_oop_counts = nonstatic_oop_counts;
4326 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4327 info->total_oop_map_count = total_oop_map_count;
4328 info->instance_size = instance_size;
4329 info->static_field_size = static_field_size;
4330 info->nonstatic_field_size = nonstatic_field_size;
4331 info->has_nonstatic_fields = has_nonstatic_fields;
4332 }
4333
4334 static void fill_oop_maps(const InstanceKlass* k,
4335 unsigned int nonstatic_oop_map_count,
4336 const int* nonstatic_oop_offsets,
4337 const unsigned int* nonstatic_oop_counts) {
4338
4339 assert(k != NULL, "invariant");
4340
4341 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4342 const InstanceKlass* const super = k->superklass();
4343 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4344 if (super_count > 0) {
4345 // Copy maps from superklass
4346 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4347 for (unsigned int i = 0; i < super_count; ++i) {
4348 *this_oop_map++ = *super_oop_map++;
4349 }
4350 }
4351
4352 if (nonstatic_oop_map_count > 0) {
4353 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4354 // The counts differ because there is no gap between superklass's last oop
4355 // field and the first local oop field. Extend the last oop map copied
4356 // from the superklass instead of creating new one.
4357 nonstatic_oop_map_count--;
4358 nonstatic_oop_offsets++;
4359 this_oop_map--;
4360 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4361 this_oop_map++;
4362 }
4363
4364 // Add new map blocks, fill them
4365 while (nonstatic_oop_map_count-- > 0) {
4366 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4367 this_oop_map->set_count(*nonstatic_oop_counts++);
4368 this_oop_map++;
4369 }
4370 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4371 this_oop_map, "sanity");
4372 }
4373 }
4374
4375
4376 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4377 assert(ik != NULL, "invariant");
4378
4379 const Klass* const super = ik->super();
4380
4381 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4382 // in which case we don't have to register objects as finalizable
4383 if (!_has_empty_finalizer) {
4384 if (_has_finalizer ||
4385 (super != NULL && super->has_finalizer())) {
4386 ik->set_has_finalizer();
4387 }
4388 }
4389
4390 #ifdef ASSERT
4391 bool f = false;
4392 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4393 vmSymbols::void_method_signature());
4394 if (m != NULL && !m->is_empty_method()) {
4395 f = true;
4396 }
4397
4398 // Spec doesn't prevent agent from redefinition of empty finalizer.
4399 // Despite the fact that it's generally bad idea and redefined finalizer
4400 // will not work as expected we shouldn't abort vm in this case
4401 if (!ik->has_redefined_this_or_super()) {
4402 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4403 }
4404 #endif
4405
4406 // Check if this klass supports the java.lang.Cloneable interface
4407 if (SystemDictionary::Cloneable_klass_loaded()) {
4408 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4409 ik->set_is_cloneable();
4410 }
4411 }
4412
4413 // Check if this klass has a vanilla default constructor
4414 if (super == NULL) {
4415 // java.lang.Object has empty default constructor
4416 ik->set_has_vanilla_constructor();
4417 } else {
4418 if (super->has_vanilla_constructor() &&
4419 _has_vanilla_constructor) {
4420 ik->set_has_vanilla_constructor();
4421 }
4422 #ifdef ASSERT
4423 bool v = false;
4424 if (super->has_vanilla_constructor()) {
4425 const Method* const constructor =
4426 ik->find_method(vmSymbols::object_initializer_name(),
4427 vmSymbols::void_method_signature());
4428 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4429 v = true;
4430 }
4431 }
4432 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4433 #endif
4434 }
4435
4436 // If it cannot be fast-path allocated, set a bit in the layout helper.
4437 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4438 assert(ik->size_helper() > 0, "layout_helper is initialized");
4439 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4440 || ik->is_abstract() || ik->is_interface()
4441 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4442 || ik->size_helper() >= FastAllocateSizeLimit) {
4443 // Forbid fast-path allocation.
4444 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4445 ik->set_layout_helper(lh);
4446 }
4447 }
4448
4449 // utility methods for appending an array with check for duplicates
4450
4451 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4452 const Array<InstanceKlass*>* const ifs) {
4453 // iterate over new interfaces
4454 for (int i = 0; i < ifs->length(); i++) {
4455 InstanceKlass* const e = ifs->at(i);
4456 assert(e->is_klass() && e->is_interface(), "just checking");
4457 // add new interface
4458 result->append_if_missing(e);
4459 }
4460 }
4461
4462 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4463 Array<InstanceKlass*>* local_ifs,
4464 ClassLoaderData* loader_data,
4465 TRAPS) {
4466 assert(local_ifs != NULL, "invariant");
4467 assert(loader_data != NULL, "invariant");
4468
4469 // Compute maximum size for transitive interfaces
4470 int max_transitive_size = 0;
4471 int super_size = 0;
4472 // Add superclass transitive interfaces size
4473 if (super != NULL) {
4474 super_size = super->transitive_interfaces()->length();
4475 max_transitive_size += super_size;
4476 }
4477 // Add local interfaces' super interfaces
4478 const int local_size = local_ifs->length();
4479 for (int i = 0; i < local_size; i++) {
4480 InstanceKlass* const l = local_ifs->at(i);
4481 max_transitive_size += l->transitive_interfaces()->length();
4482 }
4483 // Finally add local interfaces
4484 max_transitive_size += local_size;
4485 // Construct array
4486 if (max_transitive_size == 0) {
4487 // no interfaces, use canonicalized array
4488 return Universe::the_empty_instance_klass_array();
4489 } else if (max_transitive_size == super_size) {
4490 // no new local interfaces added, share superklass' transitive interface array
4491 return super->transitive_interfaces();
4492 } else if (max_transitive_size == local_size) {
4493 // only local interfaces added, share local interface array
4494 return local_ifs;
4495 } else {
4496 ResourceMark rm;
4497 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4498
4499 // Copy down from superclass
4500 if (super != NULL) {
4501 append_interfaces(result, super->transitive_interfaces());
4502 }
4503
4504 // Copy down from local interfaces' superinterfaces
4505 for (int i = 0; i < local_size; i++) {
4506 InstanceKlass* const l = local_ifs->at(i);
4507 append_interfaces(result, l->transitive_interfaces());
4508 }
4509 // Finally add local interfaces
4510 append_interfaces(result, local_ifs);
4511
4512 // length will be less than the max_transitive_size if duplicates were removed
4513 const int length = result->length();
4514 assert(length <= max_transitive_size, "just checking");
4515 Array<InstanceKlass*>* const new_result =
4516 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4517 for (int i = 0; i < length; i++) {
4518 InstanceKlass* const e = result->at(i);
4519 assert(e != NULL, "just checking");
4520 new_result->at_put(i, e);
4521 }
4522 return new_result;
4523 }
4524 }
4525
4526 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4527 assert(this_klass != NULL, "invariant");
4528 const Klass* const super = this_klass->super();
4529 if (super != NULL) {
4530
4531 // If the loader is not the boot loader then throw an exception if its
4532 // superclass is in package jdk.internal.reflect and its loader is not a
4533 // special reflection class loader
4534 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4535 assert(super->is_instance_klass(), "super is not instance klass");
4536 PackageEntry* super_package = super->package();
4537 if (super_package != NULL &&
4538 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4539 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4540 ResourceMark rm(THREAD);
4541 Exceptions::fthrow(
4542 THREAD_AND_LOCATION,
4543 vmSymbols::java_lang_IllegalAccessError(),
4544 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4545 this_klass->external_name(),
4546 this_klass->class_loader_data()->loader_name_and_id(),
4547 super->external_name());
4548 return;
4549 }
4550 }
4551
4552 Reflection::VerifyClassAccessResults vca_result =
4553 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4554 if (vca_result != Reflection::ACCESS_OK) {
4555 ResourceMark rm(THREAD);
4556 char* msg = Reflection::verify_class_access_msg(this_klass,
4557 InstanceKlass::cast(super),
4558 vca_result);
4559 if (msg == NULL) {
4560 bool same_module = (this_klass->module() == super->module());
4561 Exceptions::fthrow(
4562 THREAD_AND_LOCATION,
4563 vmSymbols::java_lang_IllegalAccessError(),
4564 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4565 this_klass->external_name(),
4566 super->is_abstract() ? "abstract " : "",
4567 super->external_name(),
4568 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4569 (same_module) ? "" : "; ",
4570 (same_module) ? "" : super->class_in_module_of_loader());
4571 } else {
4572 // Add additional message content.
4573 Exceptions::fthrow(
4574 THREAD_AND_LOCATION,
4575 vmSymbols::java_lang_IllegalAccessError(),
4576 "superclass access check failed: %s",
4577 msg);
4578 }
4579 }
4580 }
4581 }
4582
4583
4584 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4585 assert(this_klass != NULL, "invariant");
4586 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4587 const int lng = local_interfaces->length();
4588 for (int i = lng - 1; i >= 0; i--) {
4589 InstanceKlass* const k = local_interfaces->at(i);
4590 assert (k != NULL && k->is_interface(), "invalid interface");
4591 Reflection::VerifyClassAccessResults vca_result =
4592 Reflection::verify_class_access(this_klass, k, false);
4593 if (vca_result != Reflection::ACCESS_OK) {
4594 ResourceMark rm(THREAD);
4595 char* msg = Reflection::verify_class_access_msg(this_klass,
4596 k,
4597 vca_result);
4598 if (msg == NULL) {
4599 bool same_module = (this_klass->module() == k->module());
4600 Exceptions::fthrow(
4601 THREAD_AND_LOCATION,
4602 vmSymbols::java_lang_IllegalAccessError(),
4603 "class %s cannot access its superinterface %s (%s%s%s)",
4604 this_klass->external_name(),
4605 k->external_name(),
4606 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4607 (same_module) ? "" : "; ",
4608 (same_module) ? "" : k->class_in_module_of_loader());
4609 } else {
4610 // Add additional message content.
4611 Exceptions::fthrow(
4612 THREAD_AND_LOCATION,
4613 vmSymbols::java_lang_IllegalAccessError(),
4614 "superinterface check failed: %s",
4615 msg);
4616 }
4617 }
4618 }
4619 }
4620
4621
4622 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4623 assert(this_klass != NULL, "invariant");
4624 const Array<Method*>* const methods = this_klass->methods();
4625 const int num_methods = methods->length();
4626
4627 // go thru each method and check if it overrides a final method
4628 for (int index = 0; index < num_methods; index++) {
4629 const Method* const m = methods->at(index);
4630
4631 // skip private, static, and <init> methods
4632 if ((!m->is_private() && !m->is_static()) &&
4633 (m->name() != vmSymbols::object_initializer_name())) {
4634
4635 const Symbol* const name = m->name();
4636 const Symbol* const signature = m->signature();
4637 const Klass* k = this_klass->super();
4638 const Method* super_m = NULL;
4639 while (k != NULL) {
4640 // skip supers that don't have final methods.
4641 if (k->has_final_method()) {
4642 // lookup a matching method in the super class hierarchy
4643 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4644 if (super_m == NULL) {
4645 break; // didn't find any match; get out
4646 }
4647
4648 if (super_m->is_final() && !super_m->is_static() &&
4649 !super_m->access_flags().is_private()) {
4650 // matching method in super is final, and not static or private
4651 bool can_access = Reflection::verify_member_access(this_klass,
4652 super_m->method_holder(),
4653 super_m->method_holder(),
4654 super_m->access_flags(),
4655 false, false, CHECK);
4656 if (can_access) {
4657 // this class can access super final method and therefore override
4658 ResourceMark rm(THREAD);
4659 Exceptions::fthrow(THREAD_AND_LOCATION,
4660 vmSymbols::java_lang_VerifyError(),
4661 "class %s overrides final method %s.%s%s",
4662 this_klass->external_name(),
4663 super_m->method_holder()->external_name(),
4664 name->as_C_string(),
4665 signature->as_C_string()
4666 );
4667 return;
4668 }
4669 }
4670
4671 // continue to look from super_m's holder's super.
4672 k = super_m->method_holder()->super();
4673 continue;
4674 }
4675
4676 k = k->super();
4677 }
4678 }
4679 }
4680 }
4681
4682
4683 // assumes that this_klass is an interface
4684 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4685 assert(this_klass != NULL, "invariant");
4686 assert(this_klass->is_interface(), "not an interface");
4687 const Array<Method*>* methods = this_klass->methods();
4688 const int num_methods = methods->length();
4689
4690 for (int index = 0; index < num_methods; index++) {
4691 const Method* const m = methods->at(index);
4692 // if m is static and not the init method, throw a verify error
4693 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4694 ResourceMark rm(THREAD);
4695 Exceptions::fthrow(
4696 THREAD_AND_LOCATION,
4697 vmSymbols::java_lang_VerifyError(),
4698 "Illegal static method %s in interface %s",
4699 m->name()->as_C_string(),
4700 this_klass->external_name()
4701 );
4702 return;
4703 }
4704 }
4705 }
4706
4707 // utility methods for format checking
4708
4709 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4710 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4711 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4712 if (is_module) {
4713 ResourceMark rm(THREAD);
4714 Exceptions::fthrow(
4715 THREAD_AND_LOCATION,
4716 vmSymbols::java_lang_NoClassDefFoundError(),
4717 "%s is not a class because access_flag ACC_MODULE is set",
4718 _class_name->as_C_string());
4719 return;
4720 }
4721
4722 if (!_need_verify) { return; }
4723
4724 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4725 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4726 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4727 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4728 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4729 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4730 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4731
4732 if ((is_abstract && is_final) ||
4733 (is_interface && !is_abstract) ||
4734 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4735 (!is_interface && major_gte_15 && is_annotation)) {
4736 ResourceMark rm(THREAD);
4737 Exceptions::fthrow(
4738 THREAD_AND_LOCATION,
4739 vmSymbols::java_lang_ClassFormatError(),
4740 "Illegal class modifiers in class %s: 0x%X",
4741 _class_name->as_C_string(), flags
4742 );
4743 return;
4744 }
4745 }
4746
4747 static bool has_illegal_visibility(jint flags) {
4748 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4749 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4750 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4751
4752 return ((is_public && is_protected) ||
4753 (is_public && is_private) ||
4754 (is_protected && is_private));
4755 }
4756
4757 // A legal major_version.minor_version must be one of the following:
4758 //
4759 // Major_version >= 45 and major_version < 56, any minor_version.
4760 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4761 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4762 //
4763 static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4764 ResourceMark rm(THREAD);
4765 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4766 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4767 Exceptions::fthrow(
4768 THREAD_AND_LOCATION,
4769 vmSymbols::java_lang_UnsupportedClassVersionError(),
4770 "%s (class file version %u.%u) was compiled with an invalid major version",
4771 class_name->as_C_string(), major, minor);
4772 return;
4773 }
4774
4775 if (major > max_version) {
4776 Exceptions::fthrow(
4777 THREAD_AND_LOCATION,
4778 vmSymbols::java_lang_UnsupportedClassVersionError(),
4779 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4780 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4781 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4782 return;
4783 }
4784
4785 if (major < JAVA_12_VERSION || minor == 0) {
4786 return;
4787 }
4788
4789 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4790 if (major != max_version) {
4791 Exceptions::fthrow(
4792 THREAD_AND_LOCATION,
4793 vmSymbols::java_lang_UnsupportedClassVersionError(),
4794 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4795 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4796 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4797 return;
4798 }
4799
4800 if (!Arguments::enable_preview()) {
4801 Exceptions::fthrow(
4802 THREAD_AND_LOCATION,
4803 vmSymbols::java_lang_UnsupportedClassVersionError(),
4804 "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4805 class_name->as_C_string(), major, minor);
4806 return;
4807 }
4808
4809 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4810 Exceptions::fthrow(
4811 THREAD_AND_LOCATION,
4812 vmSymbols::java_lang_UnsupportedClassVersionError(),
4813 "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4814 class_name->as_C_string(), major, minor);
4815 }
4816 }
4817
4818 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4819 bool is_interface,
4820 TRAPS) const {
4821 if (!_need_verify) { return; }
4822
4823 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4824 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4825 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4826 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4827 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4828 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4829 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4830 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4831 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4832
4833 bool is_illegal = false;
4834
4835 if (is_interface) {
4836 if (!is_public || !is_static || !is_final || is_private ||
4837 is_protected || is_volatile || is_transient ||
4838 (major_gte_15 && is_enum)) {
4839 is_illegal = true;
4840 }
4841 } else { // not interface
4842 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4843 is_illegal = true;
4844 }
4845 }
4846
4847 if (is_illegal) {
4848 ResourceMark rm(THREAD);
4849 Exceptions::fthrow(
4850 THREAD_AND_LOCATION,
4851 vmSymbols::java_lang_ClassFormatError(),
4852 "Illegal field modifiers in class %s: 0x%X",
4853 _class_name->as_C_string(), flags);
4854 return;
4855 }
4856 }
4857
4858 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4859 bool is_interface,
4860 const Symbol* name,
4861 TRAPS) const {
4862 if (!_need_verify) { return; }
4863
4864 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4865 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4866 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4867 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4868 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4869 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4870 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4871 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4872 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4873 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4874 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4875 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4876 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4877
4878 bool is_illegal = false;
4879
4880 if (is_interface) {
4881 if (major_gte_8) {
4882 // Class file version is JAVA_8_VERSION or later Methods of
4883 // interfaces may set any of the flags except ACC_PROTECTED,
4884 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4885 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4886 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4887 (is_native || is_protected || is_final || is_synchronized) ||
4888 // If a specific method of a class or interface has its
4889 // ACC_ABSTRACT flag set, it must not have any of its
4890 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4891 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4892 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4893 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4894 (is_abstract && (is_private || is_static || is_strict))) {
4895 is_illegal = true;
4896 }
4897 } else if (major_gte_15) {
4898 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4899 if (!is_public || is_private || is_protected || is_static || is_final ||
4900 is_synchronized || is_native || !is_abstract || is_strict) {
4901 is_illegal = true;
4902 }
4903 } else {
4904 // Class file version is pre-JAVA_1_5_VERSION
4905 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4906 is_illegal = true;
4907 }
4908 }
4909 } else { // not interface
4910 if (has_illegal_visibility(flags)) {
4911 is_illegal = true;
4912 } else {
4913 if (is_initializer) {
4914 if (is_static || is_final || is_synchronized || is_native ||
4915 is_abstract || (major_gte_15 && is_bridge)) {
4916 is_illegal = true;
4917 }
4918 } else { // not initializer
4919 if (is_abstract) {
4920 if ((is_final || is_native || is_private || is_static ||
4921 (major_gte_15 && (is_synchronized || is_strict)))) {
4922 is_illegal = true;
4923 }
4924 }
4925 }
4926 }
4927 }
4928
4929 if (is_illegal) {
4930 ResourceMark rm(THREAD);
4931 Exceptions::fthrow(
4932 THREAD_AND_LOCATION,
4933 vmSymbols::java_lang_ClassFormatError(),
4934 "Method %s in class %s has illegal modifiers: 0x%X",
4935 name->as_C_string(), _class_name->as_C_string(), flags);
4936 return;
4937 }
4938 }
4939
4940 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4941 int length,
4942 TRAPS) const {
4943 assert(_need_verify, "only called when _need_verify is true");
4944 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4945 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4946 }
4947 }
4948
4949 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4950 // In class names, '/' separates unqualified names. This is verified in this function also.
4951 // Method names also may not contain the characters '<' or '>', unless <init>
4952 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4953 // method. Because these names have been checked as special cases before
4954 // calling this method in verify_legal_method_name.
4955 //
4956 // This method is also called from the modular system APIs in modules.cpp
4957 // to verify the validity of module and package names.
4958 bool ClassFileParser::verify_unqualified_name(const char* name,
4959 unsigned int length,
4960 int type) {
4961 if (length == 0) return false; // Must have at least one char.
4962 for (const char* p = name; p != name + length; p++) {
4963 switch(*p) {
4964 case '.':
4965 case ';':
4966 case '[':
4967 // do not permit '.', ';', or '['
4968 return false;
4969 case '/':
4970 // check for '//' or leading or trailing '/' which are not legal
4971 // unqualified name must not be empty
4972 if (type == ClassFileParser::LegalClass) {
4973 if (p == name || p+1 >= name+length || *(p+1) == '/') {
4974 return false;
4975 }
4976 } else {
4977 return false; // do not permit '/' unless it's class name
4978 }
4979 break;
4980 case '<':
4981 case '>':
4982 // do not permit '<' or '>' in method names
4983 if (type == ClassFileParser::LegalMethod) {
4984 return false;
4985 }
4986 }
4987 }
4988 return true;
4989 }
4990
4991 // Take pointer to a UTF8 byte string (not NUL-terminated).
4992 // Skip over the longest part of the string that could
4993 // be taken as a fieldname. Allow '/' if slash_ok is true.
4994 // Return a pointer to just past the fieldname.
4995 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4996 // being true, we saw consecutive slashes (meaning we were looking for a
4997 // qualified path but found something that was badly-formed).
4998 static const char* skip_over_field_name(const char* const name,
4999 bool slash_ok,
5000 unsigned int length) {
5001 const char* p;
5002 jboolean last_is_slash = false;
5003 jboolean not_first_ch = false;
5004
5005 for (p = name; p != name + length; not_first_ch = true) {
5006 const char* old_p = p;
5007 jchar ch = *p;
5008 if (ch < 128) {
5009 p++;
5010 // quick check for ascii
5011 if ((ch >= 'a' && ch <= 'z') ||
5012 (ch >= 'A' && ch <= 'Z') ||
5013 (ch == '_' || ch == '$') ||
5014 (not_first_ch && ch >= '0' && ch <= '9')) {
5015 last_is_slash = false;
5016 continue;
5017 }
5018 if (slash_ok && ch == '/') {
5019 if (last_is_slash) {
5020 return NULL; // Don't permit consecutive slashes
5021 }
5022 last_is_slash = true;
5023 continue;
5024 }
5025 }
5026 else {
5027 jint unicode_ch;
5028 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5029 p = tmp_p;
5030 last_is_slash = false;
5031 // Check if ch is Java identifier start or is Java identifier part
5032 // 4672820: call java.lang.Character methods directly without generating separate tables.
5033 EXCEPTION_MARK;
5034 // return value
5035 JavaValue result(T_BOOLEAN);
5036 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5037 JavaCallArguments args;
5038 args.push_int(unicode_ch);
5039
5040 if (not_first_ch) {
5041 // public static boolean isJavaIdentifierPart(char ch);
5042 JavaCalls::call_static(&result,
5043 SystemDictionary::Character_klass(),
5044 vmSymbols::isJavaIdentifierPart_name(),
5045 vmSymbols::int_bool_signature(),
5046 &args,
5047 THREAD);
5048 } else {
5049 // public static boolean isJavaIdentifierStart(char ch);
5050 JavaCalls::call_static(&result,
5051 SystemDictionary::Character_klass(),
5052 vmSymbols::isJavaIdentifierStart_name(),
5053 vmSymbols::int_bool_signature(),
5054 &args,
5055 THREAD);
5056 }
5057 if (HAS_PENDING_EXCEPTION) {
5058 CLEAR_PENDING_EXCEPTION;
5059 return NULL;
5060 }
5061 if(result.get_jboolean()) {
5062 continue;
5063 }
5064 }
5065 return (not_first_ch) ? old_p : NULL;
5066 }
5067 return (not_first_ch) ? p : NULL;
5068 }
5069
5070 // Take pointer to a UTF8 byte string (not NUL-terminated).
5071 // Skip over the longest part of the string that could
5072 // be taken as a field signature. Allow "void" if void_ok.
5073 // Return a pointer to just past the signature.
5074 // Return NULL if no legal signature is found.
5075 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5076 bool void_ok,
5077 unsigned int length,
5078 TRAPS) const {
5079 unsigned int array_dim = 0;
5080 while (length > 0) {
5081 switch (signature[0]) {
5082 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5083 case JVM_SIGNATURE_BOOLEAN:
5084 case JVM_SIGNATURE_BYTE:
5085 case JVM_SIGNATURE_CHAR:
5086 case JVM_SIGNATURE_SHORT:
5087 case JVM_SIGNATURE_INT:
5088 case JVM_SIGNATURE_FLOAT:
5089 case JVM_SIGNATURE_LONG:
5090 case JVM_SIGNATURE_DOUBLE:
5091 return signature + 1;
5092 case JVM_SIGNATURE_CLASS: {
5093 if (_major_version < JAVA_1_5_VERSION) {
5094 // Skip over the class name if one is there
5095 const char* const p = skip_over_field_name(signature + 1, true, --length);
5096
5097 // The next character better be a semicolon
5098 if (p && (p - signature) > 1 && p[0] == ';') {
5099 return p + 1;
5100 }
5101 }
5102 else {
5103 // Skip leading 'L' and ignore first appearance of ';'
5104 signature++;
5105 const char* c = (const char*) memchr(signature, ';', length - 1);
5106 // Format check signature
5107 if (c != NULL) {
5108 int newlen = c - (char*) signature;
5109 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5110 if (!legal) {
5111 classfile_parse_error("Class name is empty or contains illegal character "
5112 "in descriptor in class file %s",
5113 CHECK_0);
5114 return NULL;
5115 }
5116 return signature + newlen + 1;
5117 }
5118 }
5119 return NULL;
5120 }
5121 case JVM_SIGNATURE_ARRAY:
5122 array_dim++;
5123 if (array_dim > 255) {
5124 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5125 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5126 }
5127 // The rest of what's there better be a legal signature
5128 signature++;
5129 length--;
5130 void_ok = false;
5131 break;
5132 default:
5133 return NULL;
5134 }
5135 }
5136 return NULL;
5137 }
5138
5139 // Checks if name is a legal class name.
5140 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5141 if (!_need_verify || _relax_verify) { return; }
5142
5143 assert(name->refcount() > 0, "symbol must be kept alive");
5144 char* bytes = (char*)name->bytes();
5145 unsigned int length = name->utf8_length();
5146 bool legal = false;
5147
5148 if (length > 0) {
5149 const char* p;
5150 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5151 p = skip_over_field_signature(bytes, false, length, CHECK);
5152 legal = (p != NULL) && ((p - bytes) == (int)length);
5153 } else if (_major_version < JAVA_1_5_VERSION) {
5154 if (bytes[0] != '<') {
5155 p = skip_over_field_name(bytes, true, length);
5156 legal = (p != NULL) && ((p - bytes) == (int)length);
5157 }
5158 } else {
5159 // 4900761: relax the constraints based on JSR202 spec
5160 // Class names may be drawn from the entire Unicode character set.
5161 // Identifiers between '/' must be unqualified names.
5162 // The utf8 string has been verified when parsing cpool entries.
5163 legal = verify_unqualified_name(bytes, length, LegalClass);
5164 }
5165 }
5166 if (!legal) {
5167 ResourceMark rm(THREAD);
5168 assert(_class_name != NULL, "invariant");
5169 Exceptions::fthrow(
5170 THREAD_AND_LOCATION,
5171 vmSymbols::java_lang_ClassFormatError(),
5172 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5173 _class_name->as_C_string()
5174 );
5175 return;
5176 }
5177 }
5178
5179 // Checks if name is a legal field name.
5180 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5181 if (!_need_verify || _relax_verify) { return; }
5182
5183 char* bytes = (char*)name->bytes();
5184 unsigned int length = name->utf8_length();
5185 bool legal = false;
5186
5187 if (length > 0) {
5188 if (_major_version < JAVA_1_5_VERSION) {
5189 if (bytes[0] != '<') {
5190 const char* p = skip_over_field_name(bytes, false, length);
5191 legal = (p != NULL) && ((p - bytes) == (int)length);
5192 }
5193 } else {
5194 // 4881221: relax the constraints based on JSR202 spec
5195 legal = verify_unqualified_name(bytes, length, LegalField);
5196 }
5197 }
5198
5199 if (!legal) {
5200 ResourceMark rm(THREAD);
5201 assert(_class_name != NULL, "invariant");
5202 Exceptions::fthrow(
5203 THREAD_AND_LOCATION,
5204 vmSymbols::java_lang_ClassFormatError(),
5205 "Illegal field name \"%.*s\" in class %s", length, bytes,
5206 _class_name->as_C_string()
5207 );
5208 return;
5209 }
5210 }
5211
5212 // Checks if name is a legal method name.
5213 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5214 if (!_need_verify || _relax_verify) { return; }
5215
5216 assert(name != NULL, "method name is null");
5217 char* bytes = (char*)name->bytes();
5218 unsigned int length = name->utf8_length();
5219 bool legal = false;
5220
5221 if (length > 0) {
5222 if (bytes[0] == '<') {
5223 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5224 legal = true;
5225 }
5226 } else if (_major_version < JAVA_1_5_VERSION) {
5227 const char* p;
5228 p = skip_over_field_name(bytes, false, length);
5229 legal = (p != NULL) && ((p - bytes) == (int)length);
5230 } else {
5231 // 4881221: relax the constraints based on JSR202 spec
5232 legal = verify_unqualified_name(bytes, length, LegalMethod);
5233 }
5234 }
5235
5236 if (!legal) {
5237 ResourceMark rm(THREAD);
5238 assert(_class_name != NULL, "invariant");
5239 Exceptions::fthrow(
5240 THREAD_AND_LOCATION,
5241 vmSymbols::java_lang_ClassFormatError(),
5242 "Illegal method name \"%.*s\" in class %s", length, bytes,
5243 _class_name->as_C_string()
5244 );
5245 return;
5246 }
5247 }
5248
5249
5250 // Checks if signature is a legal field signature.
5251 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5252 const Symbol* signature,
5253 TRAPS) const {
5254 if (!_need_verify) { return; }
5255
5256 const char* const bytes = (const char* const)signature->bytes();
5257 const unsigned int length = signature->utf8_length();
5258 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5259
5260 if (p == NULL || (p - bytes) != (int)length) {
5261 throwIllegalSignature("Field", name, signature, CHECK);
5262 }
5263 }
5264
5265 // Checks if signature is a legal method signature.
5266 // Returns number of parameters
5267 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5268 const Symbol* signature,
5269 TRAPS) const {
5270 if (!_need_verify) {
5271 // make sure caller's args_size will be less than 0 even for non-static
5272 // method so it will be recomputed in compute_size_of_parameters().
5273 return -2;
5274 }
5275
5276 // Class initializers cannot have args for class format version >= 51.
5277 if (name == vmSymbols::class_initializer_name() &&
5278 signature != vmSymbols::void_method_signature() &&
5279 _major_version >= JAVA_7_VERSION) {
5280 throwIllegalSignature("Method", name, signature, CHECK_0);
5281 return 0;
5282 }
5283
5284 unsigned int args_size = 0;
5285 const char* p = (const char*)signature->bytes();
5286 unsigned int length = signature->utf8_length();
5287 const char* nextp;
5288
5289 // The first character must be a '('
5290 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5291 length--;
5292 // Skip over legal field signatures
5293 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5294 while ((length > 0) && (nextp != NULL)) {
5295 args_size++;
5296 if (p[0] == 'J' || p[0] == 'D') {
5297 args_size++;
5298 }
5299 length -= nextp - p;
5300 p = nextp;
5301 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5302 }
5303 // The first non-signature thing better be a ')'
5304 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5305 length--;
5306 if (name->utf8_length() > 0 && name->char_at(0) == '<') {
5307 // All internal methods must return void
5308 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5309 return args_size;
5310 }
5311 } else {
5312 // Now we better just have a return value
5313 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5314 if (nextp && ((int)length == (nextp - p))) {
5315 return args_size;
5316 }
5317 }
5318 }
5319 }
5320 // Report error
5321 throwIllegalSignature("Method", name, signature, CHECK_0);
5322 return 0;
5323 }
5324
5325 int ClassFileParser::static_field_size() const {
5326 assert(_field_info != NULL, "invariant");
5327 return _field_info->static_field_size;
5328 }
5329
5330 int ClassFileParser::total_oop_map_count() const {
5331 assert(_field_info != NULL, "invariant");
5332 return _field_info->total_oop_map_count;
5333 }
5334
5335 jint ClassFileParser::layout_size() const {
5336 assert(_field_info != NULL, "invariant");
5337 return _field_info->instance_size;
5338 }
5339
5340 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5341 const Array<Method*>* methods) {
5342 assert(ik != NULL, "invariant");
5343 assert(methods != NULL, "invariant");
5344
5345 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5346 // (We used to do this lazily, but now we query it in Rewriter,
5347 // which is eagerly done for every method, so we might as well do it now,
5348 // when everything is fresh in memory.)
5349 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5350
5351 if (klass_id != vmSymbols::NO_SID) {
5352 for (int j = 0; j < methods->length(); ++j) {
5353 Method* method = methods->at(j);
5354 method->init_intrinsic_id();
5355
5356 if (CheckIntrinsics) {
5357 // Check if an intrinsic is defined for method 'method',
5358 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5359 if (method->intrinsic_id() != vmIntrinsics::_none &&
5360 !method->intrinsic_candidate()) {
5361 tty->print("Compiler intrinsic is defined for method [%s], "
5362 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5363 method->name_and_sig_as_C_string(),
5364 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5365 );
5366 tty->cr();
5367 DEBUG_ONLY(vm_exit(1));
5368 }
5369 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5370 // but there is no intrinsic available for it.
5371 if (method->intrinsic_candidate() &&
5372 method->intrinsic_id() == vmIntrinsics::_none) {
5373 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5374 "but no compiler intrinsic is defined for the method.%s",
5375 method->name_and_sig_as_C_string(),
5376 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5377 );
5378 tty->cr();
5379 DEBUG_ONLY(vm_exit(1));
5380 }
5381 }
5382 } // end for
5383
5384 #ifdef ASSERT
5385 if (CheckIntrinsics) {
5386 // Check for orphan methods in the current class. A method m
5387 // of a class C is orphan if an intrinsic is defined for method m,
5388 // but class C does not declare m.
5389 // The check is potentially expensive, therefore it is available
5390 // only in debug builds.
5391
5392 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5393 if (vmIntrinsics::_compiledLambdaForm == id) {
5394 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5395 // generated for the JVM from a LambdaForm and therefore no method
5396 // is defined for it.
5397 continue;
5398 }
5399
5400 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5401 // Check if the current class contains a method with the same
5402 // name, flags, signature.
5403 bool match = false;
5404 for (int j = 0; j < methods->length(); ++j) {
5405 const Method* method = methods->at(j);
5406 if (method->intrinsic_id() == id) {
5407 match = true;
5408 break;
5409 }
5410 }
5411
5412 if (!match) {
5413 char buf[1000];
5414 tty->print("Compiler intrinsic is defined for method [%s], "
5415 "but the method is not available in class [%s].%s",
5416 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5417 buf, sizeof(buf)),
5418 ik->name()->as_C_string(),
5419 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5420 );
5421 tty->cr();
5422 DEBUG_ONLY(vm_exit(1));
5423 }
5424 }
5425 } // end for
5426 } // CheckIntrinsics
5427 #endif // ASSERT
5428 }
5429 }
5430
5431 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5432 if (_klass != NULL) {
5433 return _klass;
5434 }
5435
5436 InstanceKlass* const ik =
5437 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5438
5439 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5440
5441 assert(_klass == ik, "invariant");
5442
5443
5444 if (ik->should_store_fingerprint()) {
5445 ik->store_fingerprint(_stream->compute_fingerprint());
5446 }
5447
5448 ik->set_has_passed_fingerprint_check(false);
5449 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5450 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5451 uint64_t fp = ik->has_stored_fingerprint() ? ik->get_stored_fingerprint() : _stream->compute_fingerprint();
5452 if (aot_fp != 0 && aot_fp == fp) {
5453 // This class matches with a class saved in an AOT library
5454 ik->set_has_passed_fingerprint_check(true);
5455 } else {
5456 ResourceMark rm;
5457 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5458 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5459 }
5460 }
5461
5462 return ik;
5463 }
5464
5465 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5466 assert(ik != NULL, "invariant");
5467
5468 // Set name and CLD before adding to CLD
5469 ik->set_class_loader_data(_loader_data);
5470 ik->set_name(_class_name);
5471
5472 // Add all classes to our internal class loader list here,
5473 // including classes in the bootstrap (NULL) class loader.
5474 const bool publicize = !is_internal();
5475
5476 _loader_data->add_class(ik, publicize);
5477
5478 set_klass_to_deallocate(ik);
5479
5480 assert(_field_info != NULL, "invariant");
5481 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5482 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5483 "sanity");
5484
5485 assert(ik->is_instance_klass(), "sanity");
5486 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5487
5488 // Fill in information already parsed
5489 ik->set_should_verify_class(_need_verify);
5490
5491 // Not yet: supers are done below to support the new subtype-checking fields
5492 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5493 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5494 assert(_fac != NULL, "invariant");
5495 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5496
5497 // this transfers ownership of a lot of arrays from
5498 // the parser onto the InstanceKlass*
5499 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5500
5501 // note that is not safe to use the fields in the parser from this point on
5502 assert(NULL == _cp, "invariant");
5503 assert(NULL == _fields, "invariant");
5504 assert(NULL == _methods, "invariant");
5505 assert(NULL == _inner_classes, "invariant");
5506 assert(NULL == _nest_members, "invariant");
5507 assert(NULL == _local_interfaces, "invariant");
5508 assert(NULL == _combined_annotations, "invariant");
5509
5510 if (_has_final_method) {
5511 ik->set_has_final_method();
5512 }
5513
5514 ik->copy_method_ordering(_method_ordering, CHECK);
5515 // The InstanceKlass::_methods_jmethod_ids cache
5516 // is managed on the assumption that the initial cache
5517 // size is equal to the number of methods in the class. If
5518 // that changes, then InstanceKlass::idnum_can_increment()
5519 // has to be changed accordingly.
5520 ik->set_initial_method_idnum(ik->methods()->length());
5521
5522 ik->set_this_class_index(_this_class_index);
5523
5524 if (is_unsafe_anonymous()) {
5525 // _this_class_index is a CONSTANT_Class entry that refers to this
5526 // anonymous class itself. If this class needs to refer to its own methods or
5527 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5528 // _this_class_index. However, because this class is anonymous (it's
5529 // not stored in SystemDictionary), _this_class_index cannot be resolved
5530 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5531 // Therefore, we must eagerly resolve _this_class_index now.
5532 ik->constants()->klass_at_put(_this_class_index, ik);
5533 }
5534
5535 ik->set_minor_version(_minor_version);
5536 ik->set_major_version(_major_version);
5537 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5538 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5539
5540 if (_unsafe_anonymous_host != NULL) {
5541 assert (ik->is_unsafe_anonymous(), "should be the same");
5542 ik->set_unsafe_anonymous_host(_unsafe_anonymous_host);
5543 }
5544
5545 // Set PackageEntry for this_klass
5546 oop cl = ik->class_loader();
5547 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5548 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5549 ik->set_package(cld, CHECK);
5550
5551 const Array<Method*>* const methods = ik->methods();
5552 assert(methods != NULL, "invariant");
5553 const int methods_len = methods->length();
5554
5555 check_methods_for_intrinsics(ik, methods);
5556
5557 // Fill in field values obtained by parse_classfile_attributes
5558 if (_parsed_annotations->has_any_annotations()) {
5559 _parsed_annotations->apply_to(ik);
5560 }
5561
5562 apply_parsed_class_attributes(ik);
5563
5564 // Miranda methods
5565 if ((_num_miranda_methods > 0) ||
5566 // if this class introduced new miranda methods or
5567 (_super_klass != NULL && _super_klass->has_miranda_methods())
5568 // super class exists and this class inherited miranda methods
5569 ) {
5570 ik->set_has_miranda_methods(); // then set a flag
5571 }
5572
5573 // Fill in information needed to compute superclasses.
5574 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5575 ik->set_transitive_interfaces(_transitive_interfaces);
5576 _transitive_interfaces = NULL;
5577
5578 // Initialize itable offset tables
5579 klassItable::setup_itable_offset_table(ik);
5580
5581 // Compute transitive closure of interfaces this class implements
5582 // Do final class setup
5583 fill_oop_maps(ik,
5584 _field_info->nonstatic_oop_map_count,
5585 _field_info->nonstatic_oop_offsets,
5586 _field_info->nonstatic_oop_counts);
5587
5588 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5589 set_precomputed_flags(ik);
5590
5591 // check if this class can access its super class
5592 check_super_class_access(ik, CHECK);
5593
5594 // check if this class can access its superinterfaces
5595 check_super_interface_access(ik, CHECK);
5596
5597 // check if this class overrides any final method
5598 check_final_method_override(ik, CHECK);
5599
5600 // reject static interface methods prior to Java 8
5601 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5602 check_illegal_static_method(ik, CHECK);
5603 }
5604
5605 // Obtain this_klass' module entry
5606 ModuleEntry* module_entry = ik->module();
5607 assert(module_entry != NULL, "module_entry should always be set");
5608
5609 // Obtain java.lang.Module
5610 Handle module_handle(THREAD, module_entry->module());
5611
5612 // Allocate mirror and initialize static fields
5613 // The create_mirror() call will also call compute_modifiers()
5614 java_lang_Class::create_mirror(ik,
5615 Handle(THREAD, _loader_data->class_loader()),
5616 module_handle,
5617 _protection_domain,
5618 CHECK);
5619
5620 assert(_all_mirandas != NULL, "invariant");
5621
5622 // Generate any default methods - default methods are public interface methods
5623 // that have a default implementation. This is new with Java 8.
5624 if (_has_nonstatic_concrete_methods) {
5625 DefaultMethods::generate_default_methods(ik,
5626 _all_mirandas,
5627 CHECK);
5628 }
5629
5630 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5631 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5632 !module_entry->has_default_read_edges()) {
5633 if (!module_entry->set_has_default_read_edges()) {
5634 // We won a potential race
5635 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5636 }
5637 }
5638
5639 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5640
5641 if (!is_internal()) {
5642 if (log_is_enabled(Info, class, load)) {
5643 ResourceMark rm;
5644 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5645 ik->print_class_load_logging(_loader_data, module_name, _stream);
5646 }
5647
5648 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5649 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5650 log_is_enabled(Info, class, preview)) {
5651 ResourceMark rm;
5652 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5653 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5654 }
5655
5656 if (log_is_enabled(Debug, class, resolve)) {
5657 ResourceMark rm;
5658 // print out the superclass.
5659 const char * from = ik->external_name();
5660 if (ik->java_super() != NULL) {
5661 log_debug(class, resolve)("%s %s (super)",
5662 from,
5663 ik->java_super()->external_name());
5664 }
5665 // print out each of the interface classes referred to by this class.
5666 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5667 if (local_interfaces != NULL) {
5668 const int length = local_interfaces->length();
5669 for (int i = 0; i < length; i++) {
5670 const InstanceKlass* const k = local_interfaces->at(i);
5671 const char * to = k->external_name();
5672 log_debug(class, resolve)("%s %s (interface)", from, to);
5673 }
5674 }
5675 }
5676 }
5677
5678 JFR_ONLY(INIT_ID(ik);)
5679
5680 // If we reach here, all is well.
5681 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5682 // in order for it to not be destroyed in the ClassFileParser destructor.
5683 set_klass_to_deallocate(NULL);
5684
5685 // it's official
5686 set_klass(ik);
5687
5688 debug_only(ik->verify();)
5689 }
5690
5691 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5692 // Decrement the refcount in the old name, since we're clobbering it.
5693 _class_name->decrement_refcount();
5694
5695 _class_name = new_class_name;
5696 // Increment the refcount of the new name.
5697 // Now the ClassFileParser owns this name and will decrement in
5698 // the destructor.
5699 _class_name->increment_refcount();
5700 }
5701
5702
5703 // For an unsafe anonymous class that is in the unnamed package, move it to its host class's
5704 // package by prepending its host class's package name to its class name and setting
5705 // its _class_name field.
5706 void ClassFileParser::prepend_host_package_name(const InstanceKlass* unsafe_anonymous_host, TRAPS) {
5707 ResourceMark rm(THREAD);
5708 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5709 "Unsafe anonymous class should not be in a package");
5710 const char* host_pkg_name =
5711 ClassLoader::package_from_name(unsafe_anonymous_host->name()->as_C_string(), NULL);
5712
5713 if (host_pkg_name != NULL) {
5714 int host_pkg_len = (int)strlen(host_pkg_name);
5715 int class_name_len = _class_name->utf8_length();
5716 int symbol_len = host_pkg_len + 1 + class_name_len;
5717 char* new_anon_name = NEW_RESOURCE_ARRAY(char, symbol_len + 1);
5718 int n = os::snprintf(new_anon_name, symbol_len + 1, "%s/%.*s",
5719 host_pkg_name, class_name_len, _class_name->base());
5720 assert(n == symbol_len, "Unexpected number of characters in string");
5721
5722 // Decrement old _class_name to avoid leaking.
5723 _class_name->decrement_refcount();
5724
5725 // Create a symbol and update the anonymous class name.
5726 // The new class name is created with a refcount of one. When installed into the InstanceKlass,
5727 // it'll be two and when the ClassFileParser destructor runs, it'll go back to one and get deleted
5728 // when the class is unloaded.
5729 _class_name = SymbolTable::new_symbol(new_anon_name, symbol_len);
5730 }
5731 }
5732
5733 // If the host class and the anonymous class are in the same package then do
5734 // nothing. If the anonymous class is in the unnamed package then move it to its
5735 // host's package. If the classes are in different packages then throw an IAE
5736 // exception.
5737 void ClassFileParser::fix_unsafe_anonymous_class_name(TRAPS) {
5738 assert(_unsafe_anonymous_host != NULL, "Expected an unsafe anonymous class");
5739
5740 const jbyte* anon_last_slash = UTF8::strrchr((const jbyte*)_class_name->base(),
5741 _class_name->utf8_length(), '/');
5742 if (anon_last_slash == NULL) { // Unnamed package
5743 prepend_host_package_name(_unsafe_anonymous_host, CHECK);
5744 } else {
5745 if (!_unsafe_anonymous_host->is_same_class_package(_unsafe_anonymous_host->class_loader(), _class_name)) {
5746 ResourceMark rm(THREAD);
5747 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5748 err_msg("Host class %s and anonymous class %s are in different packages",
5749 _unsafe_anonymous_host->name()->as_C_string(), _class_name->as_C_string()));
5750 }
5751 }
5752 }
5753
5754 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5755 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5756 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5757 bool need_verify =
5758 // verifyAll
5759 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5760 // verifyRemote
5761 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5762 return !need_verify;
5763 }
5764
5765 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5766 Symbol* name,
5767 ClassLoaderData* loader_data,
5768 Handle protection_domain,
5769 const InstanceKlass* unsafe_anonymous_host,
5770 GrowableArray<Handle>* cp_patches,
5771 Publicity pub_level,
5772 TRAPS) :
5773 _stream(stream),
5774 _requested_name(name),
5775 _class_name(NULL),
5776 _loader_data(loader_data),
5777 _unsafe_anonymous_host(unsafe_anonymous_host),
5778 _cp_patches(cp_patches),
5779 _num_patched_klasses(0),
5780 _max_num_patched_klasses(0),
5781 _orig_cp_size(0),
5782 _first_patched_klass_resolved_index(0),
5783 _super_klass(),
5784 _cp(NULL),
5785 _fields(NULL),
5786 _methods(NULL),
5787 _inner_classes(NULL),
5788 _nest_members(NULL),
5789 _nest_host(0),
5790 _local_interfaces(NULL),
5791 _transitive_interfaces(NULL),
5792 _combined_annotations(NULL),
5793 _class_annotations(NULL),
5794 _class_type_annotations(NULL),
5795 _fields_annotations(NULL),
5796 _fields_type_annotations(NULL),
5797 _klass(NULL),
5798 _klass_to_deallocate(NULL),
5799 _parsed_annotations(NULL),
5800 _fac(NULL),
5801 _field_info(NULL),
5802 _method_ordering(NULL),
5803 _all_mirandas(NULL),
5804 _vtable_size(0),
5805 _itable_size(0),
5806 _num_miranda_methods(0),
5807 _rt(REF_NONE),
5808 _protection_domain(protection_domain),
5809 _access_flags(),
5810 _pub_level(pub_level),
5811 _bad_constant_seen(0),
5812 _synthetic_flag(false),
5813 _sde_length(false),
5814 _sde_buffer(NULL),
5815 _sourcefile_index(0),
5816 _generic_signature_index(0),
5817 _major_version(0),
5818 _minor_version(0),
5819 _this_class_index(0),
5820 _super_class_index(0),
5821 _itfs_len(0),
5822 _java_fields_count(0),
5823 _need_verify(false),
5824 _relax_verify(false),
5825 _has_nonstatic_concrete_methods(false),
5826 _declares_nonstatic_concrete_methods(false),
5827 _has_final_method(false),
5828 _has_finalizer(false),
5829 _has_empty_finalizer(false),
5830 _has_vanilla_constructor(false),
5831 _max_bootstrap_specifier_index(-1) {
5832
5833 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5834 _class_name->increment_refcount();
5835
5836 assert(THREAD->is_Java_thread(), "invariant");
5837 assert(_loader_data != NULL, "invariant");
5838 assert(stream != NULL, "invariant");
5839 assert(_stream != NULL, "invariant");
5840 assert(_stream->buffer() == _stream->current(), "invariant");
5841 assert(_class_name != NULL, "invariant");
5842 assert(0 == _access_flags.as_int(), "invariant");
5843
5844 // Figure out whether we can skip format checking (matching classic VM behavior)
5845 if (DumpSharedSpaces) {
5846 // verify == true means it's a 'remote' class (i.e., non-boot class)
5847 // Verification decision is based on BytecodeVerificationRemote flag
5848 // for those classes.
5849 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5850 BytecodeVerificationLocal;
5851 }
5852 else {
5853 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5854 stream->need_verify());
5855 }
5856 if (_cp_patches != NULL) {
5857 int len = _cp_patches->length();
5858 for (int i=0; i<len; i++) {
5859 if (has_cp_patch_at(i)) {
5860 Handle patch = cp_patch_at(i);
5861 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5862 // We need to append the names of the patched classes to the end of the constant pool,
5863 // because a patched class may have a Utf8 name that's not already included in the
5864 // original constant pool. These class names are used when patch_constant_pool()
5865 // calls patch_class().
5866 //
5867 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5868 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5869 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5870 _max_num_patched_klasses++;
5871 }
5872 }
5873 }
5874 }
5875
5876 // synch back verification state to stream
5877 stream->set_verify(_need_verify);
5878
5879 // Check if verification needs to be relaxed for this class file
5880 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5881 _relax_verify = relax_format_check_for(_loader_data);
5882
5883 parse_stream(stream, CHECK);
5884
5885 post_process_parsed_stream(stream, _cp, CHECK);
5886 }
5887
5888 void ClassFileParser::clear_class_metadata() {
5889 // metadata created before the instance klass is created. Must be
5890 // deallocated if classfile parsing returns an error.
5891 _cp = NULL;
5892 _fields = NULL;
5893 _methods = NULL;
5894 _inner_classes = NULL;
5895 _nest_members = NULL;
5896 _local_interfaces = NULL;
5897 _combined_annotations = NULL;
5898 _class_annotations = _class_type_annotations = NULL;
5899 _fields_annotations = _fields_type_annotations = NULL;
5900 }
5901
5902 // Destructor to clean up
5903 ClassFileParser::~ClassFileParser() {
5904 _class_name->decrement_refcount();
5905
5906 if (_cp != NULL) {
5907 MetadataFactory::free_metadata(_loader_data, _cp);
5908 }
5909 if (_fields != NULL) {
5910 MetadataFactory::free_array<u2>(_loader_data, _fields);
5911 }
5912
5913 if (_methods != NULL) {
5914 // Free methods
5915 InstanceKlass::deallocate_methods(_loader_data, _methods);
5916 }
5917
5918 // beware of the Universe::empty_blah_array!!
5919 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5920 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5921 }
5922
5923 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
5924 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5925 }
5926
5927 // Free interfaces
5928 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5929 _local_interfaces, _transitive_interfaces);
5930
5931 if (_combined_annotations != NULL) {
5932 // After all annotations arrays have been created, they are installed into the
5933 // Annotations object that will be assigned to the InstanceKlass being created.
5934
5935 // Deallocate the Annotations object and the installed annotations arrays.
5936 _combined_annotations->deallocate_contents(_loader_data);
5937
5938 // If the _combined_annotations pointer is non-NULL,
5939 // then the other annotations fields should have been cleared.
5940 assert(_class_annotations == NULL, "Should have been cleared");
5941 assert(_class_type_annotations == NULL, "Should have been cleared");
5942 assert(_fields_annotations == NULL, "Should have been cleared");
5943 assert(_fields_type_annotations == NULL, "Should have been cleared");
5944 } else {
5945 // If the annotations arrays were not installed into the Annotations object,
5946 // then they have to be deallocated explicitly.
5947 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
5948 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
5949 Annotations::free_contents(_loader_data, _fields_annotations);
5950 Annotations::free_contents(_loader_data, _fields_type_annotations);
5951 }
5952
5953 clear_class_metadata();
5954 _transitive_interfaces = NULL;
5955
5956 // deallocate the klass if already created. Don't directly deallocate, but add
5957 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5958 // at a safepoint.
5959 if (_klass_to_deallocate != NULL) {
5960 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5961 }
5962 }
5963
5964 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5965 TRAPS) {
5966
5967 assert(stream != NULL, "invariant");
5968 assert(_class_name != NULL, "invariant");
5969
5970 // BEGIN STREAM PARSING
5971 stream->guarantee_more(8, CHECK); // magic, major, minor
5972 // Magic value
5973 const u4 magic = stream->get_u4_fast();
5974 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5975 "Incompatible magic value %u in class file %s",
5976 magic, CHECK);
5977
5978 // Version numbers
5979 _minor_version = stream->get_u2_fast();
5980 _major_version = stream->get_u2_fast();
5981
5982 if (DumpSharedSpaces && _major_version < JAVA_6_VERSION) {
5983 ResourceMark rm;
5984 warning("Pre JDK 6 class not supported by CDS: %u.%u %s",
5985 _major_version, _minor_version, _class_name->as_C_string());
5986 Exceptions::fthrow(
5987 THREAD_AND_LOCATION,
5988 vmSymbols::java_lang_UnsupportedClassVersionError(),
5989 "Unsupported major.minor version for dump time %u.%u",
5990 _major_version,
5991 _minor_version);
5992 }
5993
5994 // Check version numbers - we check this even with verifier off
5995 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
5996
5997 stream->guarantee_more(3, CHECK); // length, first cp tag
5998 u2 cp_size = stream->get_u2_fast();
5999
6000 guarantee_property(
6001 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6002 cp_size, CHECK);
6003
6004 _orig_cp_size = cp_size;
6005 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6006 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6007 }
6008 cp_size += _max_num_patched_klasses;
6009
6010 _cp = ConstantPool::allocate(_loader_data,
6011 cp_size,
6012 CHECK);
6013
6014 ConstantPool* const cp = _cp;
6015
6016 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6017
6018 assert(cp_size == (const u2)cp->length(), "invariant");
6019
6020 // ACCESS FLAGS
6021 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6022
6023 // Access flags
6024 jint flags;
6025 // JVM_ACC_MODULE is defined in JDK-9 and later.
6026 if (_major_version >= JAVA_9_VERSION) {
6027 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
6028 } else {
6029 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
6030 }
6031
6032 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6033 // Set abstract bit for old class files for backward compatibility
6034 flags |= JVM_ACC_ABSTRACT;
6035 }
6036
6037 verify_legal_class_modifiers(flags, CHECK);
6038
6039 short bad_constant = class_bad_constant_seen();
6040 if (bad_constant != 0) {
6041 // Do not throw CFE until after the access_flags are checked because if
6042 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6043 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6044 }
6045
6046 _access_flags.set_flags(flags);
6047
6048 // This class and superclass
6049 _this_class_index = stream->get_u2_fast();
6050 check_property(
6051 valid_cp_range(_this_class_index, cp_size) &&
6052 cp->tag_at(_this_class_index).is_unresolved_klass(),
6053 "Invalid this class index %u in constant pool in class file %s",
6054 _this_class_index, CHECK);
6055
6056 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6057 assert(class_name_in_cp != NULL, "class_name can't be null");
6058
6059 // Update _class_name to reflect the name in the constant pool
6060 update_class_name(class_name_in_cp);
6061
6062 // Don't need to check whether this class name is legal or not.
6063 // It has been checked when constant pool is parsed.
6064 // However, make sure it is not an array type.
6065 if (_need_verify) {
6066 guarantee_property(_class_name->char_at(0) != JVM_SIGNATURE_ARRAY,
6067 "Bad class name in class file %s",
6068 CHECK);
6069 }
6070
6071 // Checks if name in class file matches requested name
6072 if (_requested_name != NULL && _requested_name != _class_name) {
6073 ResourceMark rm(THREAD);
6074 Exceptions::fthrow(
6075 THREAD_AND_LOCATION,
6076 vmSymbols::java_lang_NoClassDefFoundError(),
6077 "%s (wrong name: %s)",
6078 _class_name->as_C_string(),
6079 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6080 );
6081 return;
6082 }
6083
6084 // if this is an anonymous class fix up its name if it's in the unnamed
6085 // package. Otherwise, throw IAE if it is in a different package than
6086 // its host class.
6087 if (_unsafe_anonymous_host != NULL) {
6088 fix_unsafe_anonymous_class_name(CHECK);
6089 }
6090
6091 // Verification prevents us from creating names with dots in them, this
6092 // asserts that that's the case.
6093 assert(is_internal_format(_class_name), "external class name format used internally");
6094
6095 if (!is_internal()) {
6096 LogTarget(Debug, class, preorder) lt;
6097 if (lt.is_enabled()){
6098 ResourceMark rm(THREAD);
6099 LogStream ls(lt);
6100 ls.print("%s", _class_name->as_klass_external_name());
6101 if (stream->source() != NULL) {
6102 ls.print(" source: %s", stream->source());
6103 }
6104 ls.cr();
6105 }
6106
6107 #if INCLUDE_CDS
6108 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6109 if (!ClassLoader::has_jrt_entry()) {
6110 warning("DumpLoadedClassList and CDS are not supported in exploded build");
6111 DumpLoadedClassList = NULL;
6112 } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6113 _unsafe_anonymous_host == NULL) {
6114 // Only dump the classes that can be stored into CDS archive.
6115 // Unsafe anonymous classes such as generated LambdaForm classes are also not included.
6116 oop class_loader = _loader_data->class_loader();
6117 ResourceMark rm(THREAD);
6118 bool skip = false;
6119 if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6120 // For the boot and platform class loaders, skip classes that are not found in the
6121 // java runtime image, such as those found in the --patch-module entries.
6122 // These classes can't be loaded from the archive during runtime.
6123 if (!stream->from_boot_loader_modules_image() && strncmp(stream->source(), "jrt:", 4) != 0) {
6124 skip = true;
6125 }
6126
6127 if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6128 // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6129 // as they can be loaded from the archive during runtime.
6130 skip = false;
6131 }
6132 }
6133 if (skip) {
6134 tty->print_cr("skip writing class %s from source %s to classlist file",
6135 _class_name->as_C_string(), stream->source());
6136 } else {
6137 classlist_file->print_cr("%s", _class_name->as_C_string());
6138 classlist_file->flush();
6139 }
6140 }
6141 }
6142 #endif
6143 }
6144
6145 // SUPERKLASS
6146 _super_class_index = stream->get_u2_fast();
6147 _super_klass = parse_super_class(cp,
6148 _super_class_index,
6149 _need_verify,
6150 CHECK);
6151
6152 // Interfaces
6153 _itfs_len = stream->get_u2_fast();
6154 parse_interfaces(stream,
6155 _itfs_len,
6156 cp,
6157 &_has_nonstatic_concrete_methods,
6158 CHECK);
6159
6160 assert(_local_interfaces != NULL, "invariant");
6161
6162 // Fields (offsets are filled in later)
6163 _fac = new FieldAllocationCount();
6164 parse_fields(stream,
6165 _access_flags.is_interface(),
6166 _fac,
6167 cp,
6168 cp_size,
6169 &_java_fields_count,
6170 CHECK);
6171
6172 assert(_fields != NULL, "invariant");
6173
6174 // Methods
6175 AccessFlags promoted_flags;
6176 parse_methods(stream,
6177 _access_flags.is_interface(),
6178 &promoted_flags,
6179 &_has_final_method,
6180 &_declares_nonstatic_concrete_methods,
6181 CHECK);
6182
6183 assert(_methods != NULL, "invariant");
6184
6185 // promote flags from parse_methods() to the klass' flags
6186 _access_flags.add_promoted_flags(promoted_flags.as_int());
6187
6188 if (_declares_nonstatic_concrete_methods) {
6189 _has_nonstatic_concrete_methods = true;
6190 }
6191
6192 // Additional attributes/annotations
6193 _parsed_annotations = new ClassAnnotationCollector();
6194 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6195
6196 assert(_inner_classes != NULL, "invariant");
6197
6198 // Finalize the Annotations metadata object,
6199 // now that all annotation arrays have been created.
6200 create_combined_annotations(CHECK);
6201
6202 // Make sure this is the end of class file stream
6203 guarantee_property(stream->at_eos(),
6204 "Extra bytes at the end of class file %s",
6205 CHECK);
6206
6207 // all bytes in stream read and parsed
6208 }
6209
6210 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6211 ConstantPool* cp,
6212 TRAPS) {
6213 assert(stream != NULL, "invariant");
6214 assert(stream->at_eos(), "invariant");
6215 assert(cp != NULL, "invariant");
6216 assert(_loader_data != NULL, "invariant");
6217
6218 if (_class_name == vmSymbols::java_lang_Object()) {
6219 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6220 "java.lang.Object cannot implement an interface in class file %s",
6221 CHECK);
6222 }
6223 // We check super class after class file is parsed and format is checked
6224 if (_super_class_index > 0 && NULL ==_super_klass) {
6225 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6226 if (_access_flags.is_interface()) {
6227 // Before attempting to resolve the superclass, check for class format
6228 // errors not checked yet.
6229 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6230 "Interfaces must have java.lang.Object as superclass in class file %s",
6231 CHECK);
6232 }
6233 Handle loader(THREAD, _loader_data->class_loader());
6234 _super_klass = (const InstanceKlass*)
6235 SystemDictionary::resolve_super_or_fail(_class_name,
6236 super_class_name,
6237 loader,
6238 _protection_domain,
6239 true,
6240 CHECK);
6241 }
6242
6243 if (_super_klass != NULL) {
6244 if (_super_klass->has_nonstatic_concrete_methods()) {
6245 _has_nonstatic_concrete_methods = true;
6246 }
6247
6248 if (_super_klass->is_interface()) {
6249 ResourceMark rm(THREAD);
6250 Exceptions::fthrow(
6251 THREAD_AND_LOCATION,
6252 vmSymbols::java_lang_IncompatibleClassChangeError(),
6253 "class %s has interface %s as super class",
6254 _class_name->as_klass_external_name(),
6255 _super_klass->external_name()
6256 );
6257 return;
6258 }
6259 // Make sure super class is not final
6260 if (_super_klass->is_final()) {
6261 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6262 }
6263 }
6264
6265 // Compute the transitive list of all unique interfaces implemented by this class
6266 _transitive_interfaces =
6267 compute_transitive_interfaces(_super_klass,
6268 _local_interfaces,
6269 _loader_data,
6270 CHECK);
6271
6272 assert(_transitive_interfaces != NULL, "invariant");
6273
6274 // sort methods
6275 _method_ordering = sort_methods(_methods);
6276
6277 _all_mirandas = new GrowableArray<Method*>(20);
6278
6279 Handle loader(THREAD, _loader_data->class_loader());
6280 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6281 &_num_miranda_methods,
6282 _all_mirandas,
6283 _super_klass,
6284 _methods,
6285 _access_flags,
6286 _major_version,
6287 loader,
6288 _class_name,
6289 _local_interfaces,
6290 CHECK);
6291
6292 // Size of Java itable (in words)
6293 _itable_size = _access_flags.is_interface() ? 0 :
6294 klassItable::compute_itable_size(_transitive_interfaces);
6295
6296 assert(_fac != NULL, "invariant");
6297 assert(_parsed_annotations != NULL, "invariant");
6298
6299 _field_info = new FieldLayoutInfo();
6300 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6301
6302 // Compute reference typ
6303 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6304
6305 }
6306
6307 void ClassFileParser::set_klass(InstanceKlass* klass) {
6308
6309 #ifdef ASSERT
6310 if (klass != NULL) {
6311 assert(NULL == _klass, "leaking?");
6312 }
6313 #endif
6314
6315 _klass = klass;
6316 }
6317
6318 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6319
6320 #ifdef ASSERT
6321 if (klass != NULL) {
6322 assert(NULL == _klass_to_deallocate, "leaking?");
6323 }
6324 #endif
6325
6326 _klass_to_deallocate = klass;
6327 }
6328
6329 // Caller responsible for ResourceMark
6330 // clone stream with rewound position
6331 const ClassFileStream* ClassFileParser::clone_stream() const {
6332 assert(_stream != NULL, "invariant");
6333
6334 return _stream->clone();
6335 }
6336 // ----------------------------------------------------------------------------
6337 // debugging
6338
6339 #ifdef ASSERT
6340
6341 // return true if class_name contains no '.' (internal format is '/')
6342 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6343 if (class_name != NULL) {
6344 ResourceMark rm;
6345 char* name = class_name->as_C_string();
6346 return strchr(name, '.') == NULL;
6347 } else {
6348 return true;
6349 }
6350 }
6351
6352 #endif