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) == JVM_SIGNATURE_SPECIAL &&
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 cfs->guarantee_more(8, CHECK_NULL);
2452 max_stack = cfs->get_u2_fast();
2453 max_locals = cfs->get_u2_fast();
2454 code_length = cfs->get_u4_fast();
2455 if (_need_verify) {
2456 guarantee_property(args_size <= max_locals,
2457 "Arguments can't fit into locals in class file %s",
2458 CHECK_NULL);
2459 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2460 "Invalid method Code length %u in class file %s",
2461 code_length, CHECK_NULL);
2462 }
2463 // Code pointer
2464 code_start = cfs->current();
2465 assert(code_start != NULL, "null code start");
2466 cfs->guarantee_more(code_length, CHECK_NULL);
2467 cfs->skip_u1_fast(code_length);
2468
2469 // Exception handler table
2470 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2471 exception_table_length = cfs->get_u2_fast();
2472 if (exception_table_length > 0) {
2473 exception_table_start = parse_exception_table(cfs,
2474 code_length,
2475 exception_table_length,
2476 CHECK_NULL);
2477 }
2478
2479 // Parse additional attributes in code attribute
2480 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2481 u2 code_attributes_count = cfs->get_u2_fast();
2482
2483 unsigned int calculated_attribute_length = 0;
2484
2485 calculated_attribute_length =
2486 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2487 calculated_attribute_length +=
2488 code_length +
2489 sizeof(exception_table_length) +
2490 sizeof(code_attributes_count) +
2491 exception_table_length *
2492 ( sizeof(u2) + // start_pc
2493 sizeof(u2) + // end_pc
2494 sizeof(u2) + // handler_pc
2495 sizeof(u2) ); // catch_type_index
2496
2497 while (code_attributes_count--) {
2498 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2499 const u2 code_attribute_name_index = cfs->get_u2_fast();
2500 const u4 code_attribute_length = cfs->get_u4_fast();
2501 calculated_attribute_length += code_attribute_length +
2502 sizeof(code_attribute_name_index) +
2503 sizeof(code_attribute_length);
2504 check_property(valid_symbol_at(code_attribute_name_index),
2505 "Invalid code attribute name index %u in class file %s",
2506 code_attribute_name_index,
2507 CHECK_NULL);
2508 if (LoadLineNumberTables &&
2509 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2510 // Parse and compress line number table
2511 parse_linenumber_table(code_attribute_length,
2512 code_length,
2513 &linenumber_table,
2514 CHECK_NULL);
2515
2516 } else if (LoadLocalVariableTables &&
2517 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2518 // Parse local variable table
2519 if (!lvt_allocated) {
2520 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2521 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2522 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2523 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2524 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2525 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2526 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2527 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2528 lvt_allocated = true;
2529 }
2530 if (lvt_cnt == max_lvt_cnt) {
2531 max_lvt_cnt <<= 1;
2532 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2533 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2534 }
2535 localvariable_table_start[lvt_cnt] =
2536 parse_localvariable_table(cfs,
2537 code_length,
2538 max_locals,
2539 code_attribute_length,
2540 &localvariable_table_length[lvt_cnt],
2541 false, // is not LVTT
2542 CHECK_NULL);
2543 total_lvt_length += localvariable_table_length[lvt_cnt];
2544 lvt_cnt++;
2545 } else if (LoadLocalVariableTypeTables &&
2546 _major_version >= JAVA_1_5_VERSION &&
2547 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2548 if (!lvt_allocated) {
2549 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2550 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2551 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2552 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2553 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2554 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2555 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2556 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2557 lvt_allocated = true;
2558 }
2559 // Parse local variable type table
2560 if (lvtt_cnt == max_lvtt_cnt) {
2561 max_lvtt_cnt <<= 1;
2562 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2563 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2564 }
2565 localvariable_type_table_start[lvtt_cnt] =
2566 parse_localvariable_table(cfs,
2567 code_length,
2568 max_locals,
2569 code_attribute_length,
2570 &localvariable_type_table_length[lvtt_cnt],
2571 true, // is LVTT
2572 CHECK_NULL);
2573 lvtt_cnt++;
2574 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2575 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2576 // Stack map is only needed by the new verifier in JDK1.5.
2577 if (parsed_stackmap_attribute) {
2578 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2579 }
2580 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2581 stackmap_data_length = code_attribute_length;
2582 parsed_stackmap_attribute = true;
2583 } else {
2584 // Skip unknown attributes
2585 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2586 }
2587 }
2588 // check method attribute length
2589 if (_need_verify) {
2590 guarantee_property(method_attribute_length == calculated_attribute_length,
2591 "Code segment has wrong length in class file %s",
2592 CHECK_NULL);
2593 }
2594 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2595 // Parse Exceptions attribute
2596 if (parsed_checked_exceptions_attribute) {
2597 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2598 CHECK_NULL);
2599 }
2600 parsed_checked_exceptions_attribute = true;
2601 checked_exceptions_start =
2602 parse_checked_exceptions(cfs,
2603 &checked_exceptions_length,
2604 method_attribute_length,
2605 CHECK_NULL);
2606 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2607 // reject multiple method parameters
2608 if (method_parameters_seen) {
2609 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2610 CHECK_NULL);
2611 }
2612 method_parameters_seen = true;
2613 method_parameters_length = cfs->get_u1_fast();
2614 const u2 real_length = (method_parameters_length * 4u) + 1u;
2615 if (method_attribute_length != real_length) {
2616 classfile_parse_error(
2617 "Invalid MethodParameters method attribute length %u in class file",
2618 method_attribute_length, CHECK_NULL);
2619 }
2620 method_parameters_data = cfs->current();
2621 cfs->skip_u2_fast(method_parameters_length);
2622 cfs->skip_u2_fast(method_parameters_length);
2623 // ignore this attribute if it cannot be reflected
2624 if (!SystemDictionary::Parameter_klass_loaded())
2625 method_parameters_length = -1;
2626 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2627 if (method_attribute_length != 0) {
2628 classfile_parse_error(
2629 "Invalid Synthetic method attribute length %u in class file %s",
2630 method_attribute_length, CHECK_NULL);
2631 }
2632 // Should we check that there hasn't already been a synthetic attribute?
2633 access_flags.set_is_synthetic();
2634 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2635 if (method_attribute_length != 0) {
2636 classfile_parse_error(
2637 "Invalid Deprecated method attribute length %u in class file %s",
2638 method_attribute_length, CHECK_NULL);
2639 }
2640 } else if (_major_version >= JAVA_1_5_VERSION) {
2641 if (method_attribute_name == vmSymbols::tag_signature()) {
2642 if (generic_signature_index != 0) {
2643 classfile_parse_error(
2644 "Multiple Signature attributes for method in class file %s",
2645 CHECK_NULL);
2646 }
2647 if (method_attribute_length != 2) {
2648 classfile_parse_error(
2649 "Invalid Signature attribute length %u in class file %s",
2650 method_attribute_length, CHECK_NULL);
2651 }
2652 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2653 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2654 if (runtime_visible_annotations != NULL) {
2655 classfile_parse_error(
2656 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2657 CHECK_NULL);
2658 }
2659 runtime_visible_annotations_length = method_attribute_length;
2660 runtime_visible_annotations = cfs->current();
2661 assert(runtime_visible_annotations != NULL, "null visible annotations");
2662 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2663 parse_annotations(cp,
2664 runtime_visible_annotations,
2665 runtime_visible_annotations_length,
2666 &parsed_annotations,
2667 _loader_data,
2668 CHECK_NULL);
2669 cfs->skip_u1_fast(runtime_visible_annotations_length);
2670 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2671 if (runtime_invisible_annotations_exists) {
2672 classfile_parse_error(
2673 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2674 CHECK_NULL);
2675 }
2676 runtime_invisible_annotations_exists = true;
2677 if (PreserveAllAnnotations) {
2678 runtime_invisible_annotations_length = method_attribute_length;
2679 runtime_invisible_annotations = cfs->current();
2680 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2681 }
2682 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2683 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2684 if (runtime_visible_parameter_annotations != NULL) {
2685 classfile_parse_error(
2686 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2687 CHECK_NULL);
2688 }
2689 runtime_visible_parameter_annotations_length = method_attribute_length;
2690 runtime_visible_parameter_annotations = cfs->current();
2691 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2692 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2693 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2694 if (runtime_invisible_parameter_annotations_exists) {
2695 classfile_parse_error(
2696 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2697 CHECK_NULL);
2698 }
2699 runtime_invisible_parameter_annotations_exists = true;
2700 if (PreserveAllAnnotations) {
2701 runtime_invisible_parameter_annotations_length = method_attribute_length;
2702 runtime_invisible_parameter_annotations = cfs->current();
2703 assert(runtime_invisible_parameter_annotations != NULL,
2704 "null invisible parameter annotations");
2705 }
2706 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2707 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2708 if (annotation_default != NULL) {
2709 classfile_parse_error(
2710 "Multiple AnnotationDefault attributes for method in class file %s",
2711 CHECK_NULL);
2712 }
2713 annotation_default_length = method_attribute_length;
2714 annotation_default = cfs->current();
2715 assert(annotation_default != NULL, "null annotation default");
2716 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2717 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2718 if (runtime_visible_type_annotations != NULL) {
2719 classfile_parse_error(
2720 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2721 CHECK_NULL);
2722 }
2723 runtime_visible_type_annotations_length = method_attribute_length;
2724 runtime_visible_type_annotations = cfs->current();
2725 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2726 // No need for the VM to parse Type annotations
2727 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2728 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2729 if (runtime_invisible_type_annotations_exists) {
2730 classfile_parse_error(
2731 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2732 CHECK_NULL);
2733 } else {
2734 runtime_invisible_type_annotations_exists = true;
2735 }
2736 if (PreserveAllAnnotations) {
2737 runtime_invisible_type_annotations_length = method_attribute_length;
2738 runtime_invisible_type_annotations = cfs->current();
2739 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2740 }
2741 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2742 } else {
2743 // Skip unknown attributes
2744 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2745 }
2746 } else {
2747 // Skip unknown attributes
2748 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2749 }
2750 }
2751
2752 if (linenumber_table != NULL) {
2753 linenumber_table->write_terminator();
2754 linenumber_table_length = linenumber_table->position();
2755 }
2756
2757 // Make sure there's at least one Code attribute in non-native/non-abstract method
2758 if (_need_verify) {
2759 guarantee_property(access_flags.is_native() ||
2760 access_flags.is_abstract() ||
2761 parsed_code_attribute,
2762 "Absent Code attribute in method that is not native or abstract in class file %s",
2763 CHECK_NULL);
2764 }
2765
2766 // All sizing information for a Method* is finally available, now create it
2767 InlineTableSizes sizes(
2768 total_lvt_length,
2769 linenumber_table_length,
2770 exception_table_length,
2771 checked_exceptions_length,
2772 method_parameters_length,
2773 generic_signature_index,
2774 runtime_visible_annotations_length +
2775 runtime_invisible_annotations_length,
2776 runtime_visible_parameter_annotations_length +
2777 runtime_invisible_parameter_annotations_length,
2778 runtime_visible_type_annotations_length +
2779 runtime_invisible_type_annotations_length,
2780 annotation_default_length,
2781 0);
2782
2783 Method* const m = Method::allocate(_loader_data,
2784 code_length,
2785 access_flags,
2786 &sizes,
2787 ConstMethod::NORMAL,
2788 CHECK_NULL);
2789
2790 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2791
2792 // Fill in information from fixed part (access_flags already set)
2793 m->set_constants(_cp);
2794 m->set_name_index(name_index);
2795 m->set_signature_index(signature_index);
2796
2797 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2798 m->constMethod()->set_result_type(rtf.type());
2799
2800 if (args_size >= 0) {
2801 m->set_size_of_parameters(args_size);
2802 } else {
2803 m->compute_size_of_parameters(THREAD);
2804 }
2805 #ifdef ASSERT
2806 if (args_size >= 0) {
2807 m->compute_size_of_parameters(THREAD);
2808 assert(args_size == m->size_of_parameters(), "");
2809 }
2810 #endif
2811
2812 // Fill in code attribute information
2813 m->set_max_stack(max_stack);
2814 m->set_max_locals(max_locals);
2815 if (stackmap_data != NULL) {
2816 m->constMethod()->copy_stackmap_data(_loader_data,
2817 (u1*)stackmap_data,
2818 stackmap_data_length,
2819 CHECK_NULL);
2820 }
2821
2822 // Copy byte codes
2823 m->set_code((u1*)code_start);
2824
2825 // Copy line number table
2826 if (linenumber_table != NULL) {
2827 memcpy(m->compressed_linenumber_table(),
2828 linenumber_table->buffer(),
2829 linenumber_table_length);
2830 }
2831
2832 // Copy exception table
2833 if (exception_table_length > 0) {
2834 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2835 m->exception_table_start(),
2836 exception_table_length * sizeof(ExceptionTableElement),
2837 sizeof(u2));
2838 }
2839
2840 // Copy method parameters
2841 if (method_parameters_length > 0) {
2842 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2843 for (int i = 0; i < method_parameters_length; i++) {
2844 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2845 method_parameters_data += 2;
2846 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2847 method_parameters_data += 2;
2848 }
2849 }
2850
2851 // Copy checked exceptions
2852 if (checked_exceptions_length > 0) {
2853 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2854 m->checked_exceptions_start(),
2855 checked_exceptions_length * sizeof(CheckedExceptionElement),
2856 sizeof(u2));
2857 }
2858
2859 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2860 if (total_lvt_length > 0) {
2861 promoted_flags->set_has_localvariable_table();
2862 copy_localvariable_table(m->constMethod(),
2863 lvt_cnt,
2864 localvariable_table_length,
2865 localvariable_table_start,
2866 lvtt_cnt,
2867 localvariable_type_table_length,
2868 localvariable_type_table_start,
2869 CHECK_NULL);
2870 }
2871
2872 if (parsed_annotations.has_any_annotations())
2873 parsed_annotations.apply_to(m);
2874
2875 // Copy annotations
2876 copy_method_annotations(m->constMethod(),
2877 runtime_visible_annotations,
2878 runtime_visible_annotations_length,
2879 runtime_invisible_annotations,
2880 runtime_invisible_annotations_length,
2881 runtime_visible_parameter_annotations,
2882 runtime_visible_parameter_annotations_length,
2883 runtime_invisible_parameter_annotations,
2884 runtime_invisible_parameter_annotations_length,
2885 runtime_visible_type_annotations,
2886 runtime_visible_type_annotations_length,
2887 runtime_invisible_type_annotations,
2888 runtime_invisible_type_annotations_length,
2889 annotation_default,
2890 annotation_default_length,
2891 CHECK_NULL);
2892
2893 if (name == vmSymbols::finalize_method_name() &&
2894 signature == vmSymbols::void_method_signature()) {
2895 if (m->is_empty_method()) {
2896 _has_empty_finalizer = true;
2897 } else {
2898 _has_finalizer = true;
2899 }
2900 }
2901 if (name == vmSymbols::object_initializer_name() &&
2902 signature == vmSymbols::void_method_signature() &&
2903 m->is_vanilla_constructor()) {
2904 _has_vanilla_constructor = true;
2905 }
2906
2907 NOT_PRODUCT(m->verify());
2908 return m;
2909 }
2910
2911
2912 // The promoted_flags parameter is used to pass relevant access_flags
2913 // from the methods back up to the containing klass. These flag values
2914 // are added to klass's access_flags.
2915 // Side-effects: populates the _methods field in the parser
2916 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2917 bool is_interface,
2918 AccessFlags* promoted_flags,
2919 bool* has_final_method,
2920 bool* declares_nonstatic_concrete_methods,
2921 TRAPS) {
2922 assert(cfs != NULL, "invariant");
2923 assert(promoted_flags != NULL, "invariant");
2924 assert(has_final_method != NULL, "invariant");
2925 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2926
2927 assert(NULL == _methods, "invariant");
2928
2929 cfs->guarantee_more(2, CHECK); // length
2930 const u2 length = cfs->get_u2_fast();
2931 if (length == 0) {
2932 _methods = Universe::the_empty_method_array();
2933 } else {
2934 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2935 length,
2936 NULL,
2937 CHECK);
2938
2939 for (int index = 0; index < length; index++) {
2940 Method* method = parse_method(cfs,
2941 is_interface,
2942 _cp,
2943 promoted_flags,
2944 CHECK);
2945
2946 if (method->is_final()) {
2947 *has_final_method = true;
2948 }
2949 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2950 // used for interface initialization, and default method inheritance analysis
2951 if (is_interface && !(*declares_nonstatic_concrete_methods)
2952 && !method->is_abstract() && !method->is_static()) {
2953 *declares_nonstatic_concrete_methods = true;
2954 }
2955 _methods->at_put(index, method);
2956 }
2957
2958 if (_need_verify && length > 1) {
2959 // Check duplicated methods
2960 ResourceMark rm(THREAD);
2961 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2962 THREAD, NameSigHash*, HASH_ROW_SIZE);
2963 initialize_hashtable(names_and_sigs);
2964 bool dup = false;
2965 const Symbol* name = NULL;
2966 const Symbol* sig = NULL;
2967 {
2968 debug_only(NoSafepointVerifier nsv;)
2969 for (int i = 0; i < length; i++) {
2970 const Method* const m = _methods->at(i);
2971 name = m->name();
2972 sig = m->signature();
2973 // If no duplicates, add name/signature in hashtable names_and_sigs.
2974 if (!put_after_lookup(name, sig, names_and_sigs)) {
2975 dup = true;
2976 break;
2977 }
2978 }
2979 }
2980 if (dup) {
2981 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2982 name->as_C_string(), sig->as_klass_external_name(), CHECK);
2983 }
2984 }
2985 }
2986 }
2987
2988 static const intArray* sort_methods(Array<Method*>* methods) {
2989 const int length = methods->length();
2990 // If JVMTI original method ordering or sharing is enabled we have to
2991 // remember the original class file ordering.
2992 // We temporarily use the vtable_index field in the Method* to store the
2993 // class file index, so we can read in after calling qsort.
2994 // Put the method ordering in the shared archive.
2995 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
2996 for (int index = 0; index < length; index++) {
2997 Method* const m = methods->at(index);
2998 assert(!m->valid_vtable_index(), "vtable index should not be set");
2999 m->set_vtable_index(index);
3000 }
3001 }
3002 // Sort method array by ascending method name (for faster lookups & vtable construction)
3003 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3004 Method::sort_methods(methods);
3005
3006 intArray* method_ordering = NULL;
3007 // If JVMTI original method ordering or sharing is enabled construct int
3008 // array remembering the original ordering
3009 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3010 method_ordering = new intArray(length, length, -1);
3011 for (int index = 0; index < length; index++) {
3012 Method* const m = methods->at(index);
3013 const int old_index = m->vtable_index();
3014 assert(old_index >= 0 && old_index < length, "invalid method index");
3015 method_ordering->at_put(index, old_index);
3016 m->set_vtable_index(Method::invalid_vtable_index);
3017 }
3018 }
3019 return method_ordering;
3020 }
3021
3022 // Parse generic_signature attribute for methods and fields
3023 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3024 TRAPS) {
3025 assert(cfs != NULL, "invariant");
3026
3027 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3028 const u2 generic_signature_index = cfs->get_u2_fast();
3029 check_property(
3030 valid_symbol_at(generic_signature_index),
3031 "Invalid Signature attribute at constant pool index %u in class file %s",
3032 generic_signature_index, CHECK_0);
3033 return generic_signature_index;
3034 }
3035
3036 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3037 TRAPS) {
3038
3039 assert(cfs != NULL, "invariant");
3040
3041 cfs->guarantee_more(2, CHECK); // sourcefile_index
3042 const u2 sourcefile_index = cfs->get_u2_fast();
3043 check_property(
3044 valid_symbol_at(sourcefile_index),
3045 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3046 sourcefile_index, CHECK);
3047 set_class_sourcefile_index(sourcefile_index);
3048 }
3049
3050 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3051 int length,
3052 TRAPS) {
3053 assert(cfs != NULL, "invariant");
3054
3055 const u1* const sde_buffer = cfs->current();
3056 assert(sde_buffer != NULL, "null sde buffer");
3057
3058 // Don't bother storing it if there is no way to retrieve it
3059 if (JvmtiExport::can_get_source_debug_extension()) {
3060 assert((length+1) > length, "Overflow checking");
3061 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3062 for (int i = 0; i < length; i++) {
3063 sde[i] = sde_buffer[i];
3064 }
3065 sde[length] = '\0';
3066 set_class_sde_buffer((const char*)sde, length);
3067 }
3068 // Got utf8 string, set stream position forward
3069 cfs->skip_u1(length, CHECK);
3070 }
3071
3072
3073 // Inner classes can be static, private or protected (classic VM does this)
3074 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3075 JVM_ACC_PRIVATE | \
3076 JVM_ACC_PROTECTED | \
3077 JVM_ACC_STATIC \
3078 )
3079
3080 // Return number of classes in the inner classes attribute table
3081 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3082 const u1* const inner_classes_attribute_start,
3083 bool parsed_enclosingmethod_attribute,
3084 u2 enclosing_method_class_index,
3085 u2 enclosing_method_method_index,
3086 TRAPS) {
3087 const u1* const current_mark = cfs->current();
3088 u2 length = 0;
3089 if (inner_classes_attribute_start != NULL) {
3090 cfs->set_current(inner_classes_attribute_start);
3091 cfs->guarantee_more(2, CHECK_0); // length
3092 length = cfs->get_u2_fast();
3093 }
3094
3095 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3096 // method data:
3097 // [inner_class_info_index,
3098 // outer_class_info_index,
3099 // inner_name_index,
3100 // inner_class_access_flags,
3101 // ...
3102 // enclosing_method_class_index,
3103 // enclosing_method_method_index]
3104 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3105 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3106 _inner_classes = inner_classes;
3107
3108 int index = 0;
3109 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3110 for (int n = 0; n < length; n++) {
3111 // Inner class index
3112 const u2 inner_class_info_index = cfs->get_u2_fast();
3113 check_property(
3114 valid_klass_reference_at(inner_class_info_index),
3115 "inner_class_info_index %u has bad constant type in class file %s",
3116 inner_class_info_index, CHECK_0);
3117 // Outer class index
3118 const u2 outer_class_info_index = cfs->get_u2_fast();
3119 check_property(
3120 outer_class_info_index == 0 ||
3121 valid_klass_reference_at(outer_class_info_index),
3122 "outer_class_info_index %u has bad constant type in class file %s",
3123 outer_class_info_index, CHECK_0);
3124 // Inner class name
3125 const u2 inner_name_index = cfs->get_u2_fast();
3126 check_property(
3127 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3128 "inner_name_index %u has bad constant type in class file %s",
3129 inner_name_index, CHECK_0);
3130 if (_need_verify) {
3131 guarantee_property(inner_class_info_index != outer_class_info_index,
3132 "Class is both outer and inner class in class file %s", CHECK_0);
3133 }
3134 // Access flags
3135 jint flags;
3136 // JVM_ACC_MODULE is defined in JDK-9 and later.
3137 if (_major_version >= JAVA_9_VERSION) {
3138 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3139 } else {
3140 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3141 }
3142 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3143 // Set abstract bit for old class files for backward compatibility
3144 flags |= JVM_ACC_ABSTRACT;
3145 }
3146 verify_legal_class_modifiers(flags, CHECK_0);
3147 AccessFlags inner_access_flags(flags);
3148
3149 inner_classes->at_put(index++, inner_class_info_index);
3150 inner_classes->at_put(index++, outer_class_info_index);
3151 inner_classes->at_put(index++, inner_name_index);
3152 inner_classes->at_put(index++, inner_access_flags.as_short());
3153 }
3154
3155 // 4347400: make sure there's no duplicate entry in the classes array
3156 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3157 for(int i = 0; i < length * 4; i += 4) {
3158 for(int j = i + 4; j < length * 4; j += 4) {
3159 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3160 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3161 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3162 inner_classes->at(i+3) != inner_classes->at(j+3)),
3163 "Duplicate entry in InnerClasses in class file %s",
3164 CHECK_0);
3165 }
3166 }
3167 }
3168
3169 // Set EnclosingMethod class and method indexes.
3170 if (parsed_enclosingmethod_attribute) {
3171 inner_classes->at_put(index++, enclosing_method_class_index);
3172 inner_classes->at_put(index++, enclosing_method_method_index);
3173 }
3174 assert(index == size, "wrong size");
3175
3176 // Restore buffer's current position.
3177 cfs->set_current(current_mark);
3178
3179 return length;
3180 }
3181
3182 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3183 const u1* const nest_members_attribute_start,
3184 TRAPS) {
3185 const u1* const current_mark = cfs->current();
3186 u2 length = 0;
3187 if (nest_members_attribute_start != NULL) {
3188 cfs->set_current(nest_members_attribute_start);
3189 cfs->guarantee_more(2, CHECK_0); // length
3190 length = cfs->get_u2_fast();
3191 }
3192 const int size = length;
3193 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3194 _nest_members = nest_members;
3195
3196 int index = 0;
3197 cfs->guarantee_more(2 * length, CHECK_0);
3198 for (int n = 0; n < length; n++) {
3199 const u2 class_info_index = cfs->get_u2_fast();
3200 check_property(
3201 valid_klass_reference_at(class_info_index),
3202 "Nest member class_info_index %u has bad constant type in class file %s",
3203 class_info_index, CHECK_0);
3204 nest_members->at_put(index++, class_info_index);
3205 }
3206 assert(index == size, "wrong size");
3207
3208 // Restore buffer's current position.
3209 cfs->set_current(current_mark);
3210
3211 return length;
3212 }
3213
3214 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3215 set_class_synthetic_flag(true);
3216 }
3217
3218 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3219 assert(cfs != NULL, "invariant");
3220
3221 const u2 signature_index = cfs->get_u2(CHECK);
3222 check_property(
3223 valid_symbol_at(signature_index),
3224 "Invalid constant pool index %u in Signature attribute in class file %s",
3225 signature_index, CHECK);
3226 set_class_generic_signature_index(signature_index);
3227 }
3228
3229 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3230 ConstantPool* cp,
3231 u4 attribute_byte_length,
3232 TRAPS) {
3233 assert(cfs != NULL, "invariant");
3234 assert(cp != NULL, "invariant");
3235
3236 const u1* const current_start = cfs->current();
3237
3238 guarantee_property(attribute_byte_length >= sizeof(u2),
3239 "Invalid BootstrapMethods attribute length %u in class file %s",
3240 attribute_byte_length,
3241 CHECK);
3242
3243 cfs->guarantee_more(attribute_byte_length, CHECK);
3244
3245 const int attribute_array_length = cfs->get_u2_fast();
3246
3247 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3248 "Short length on BootstrapMethods in class file %s",
3249 CHECK);
3250
3251
3252 // The attribute contains a counted array of counted tuples of shorts,
3253 // represending bootstrap specifiers:
3254 // length*{bootstrap_method_index, argument_count*{argument_index}}
3255 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3256 // operand_count = number of shorts in attr, except for leading length
3257
3258 // The attribute is copied into a short[] array.
3259 // The array begins with a series of short[2] pairs, one for each tuple.
3260 const int index_size = (attribute_array_length * 2);
3261
3262 Array<u2>* const operands =
3263 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3264
3265 // Eagerly assign operands so they will be deallocated with the constant
3266 // pool if there is an error.
3267 cp->set_operands(operands);
3268
3269 int operand_fill_index = index_size;
3270 const int cp_size = cp->length();
3271
3272 for (int n = 0; n < attribute_array_length; n++) {
3273 // Store a 32-bit offset into the header of the operand array.
3274 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3275
3276 // Read a bootstrap specifier.
3277 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3278 const u2 bootstrap_method_index = cfs->get_u2_fast();
3279 const u2 argument_count = cfs->get_u2_fast();
3280 check_property(
3281 valid_cp_range(bootstrap_method_index, cp_size) &&
3282 cp->tag_at(bootstrap_method_index).is_method_handle(),
3283 "bootstrap_method_index %u has bad constant type in class file %s",
3284 bootstrap_method_index,
3285 CHECK);
3286
3287 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3288 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3289 CHECK);
3290
3291 operands->at_put(operand_fill_index++, bootstrap_method_index);
3292 operands->at_put(operand_fill_index++, argument_count);
3293
3294 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3295 for (int j = 0; j < argument_count; j++) {
3296 const u2 argument_index = cfs->get_u2_fast();
3297 check_property(
3298 valid_cp_range(argument_index, cp_size) &&
3299 cp->tag_at(argument_index).is_loadable_constant(),
3300 "argument_index %u has bad constant type in class file %s",
3301 argument_index,
3302 CHECK);
3303 operands->at_put(operand_fill_index++, argument_index);
3304 }
3305 }
3306 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3307 "Bad length on BootstrapMethods in class file %s",
3308 CHECK);
3309 }
3310
3311 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3312 ConstantPool* cp,
3313 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3314 TRAPS) {
3315 assert(cfs != NULL, "invariant");
3316 assert(cp != NULL, "invariant");
3317 assert(parsed_annotations != NULL, "invariant");
3318
3319 // Set inner classes attribute to default sentinel
3320 _inner_classes = Universe::the_empty_short_array();
3321 // Set nest members attribute to default sentinel
3322 _nest_members = Universe::the_empty_short_array();
3323 cfs->guarantee_more(2, CHECK); // attributes_count
3324 u2 attributes_count = cfs->get_u2_fast();
3325 bool parsed_sourcefile_attribute = false;
3326 bool parsed_innerclasses_attribute = false;
3327 bool parsed_nest_members_attribute = false;
3328 bool parsed_nest_host_attribute = false;
3329 bool parsed_enclosingmethod_attribute = false;
3330 bool parsed_bootstrap_methods_attribute = false;
3331 const u1* runtime_visible_annotations = NULL;
3332 int runtime_visible_annotations_length = 0;
3333 const u1* runtime_invisible_annotations = NULL;
3334 int runtime_invisible_annotations_length = 0;
3335 const u1* runtime_visible_type_annotations = NULL;
3336 int runtime_visible_type_annotations_length = 0;
3337 const u1* runtime_invisible_type_annotations = NULL;
3338 int runtime_invisible_type_annotations_length = 0;
3339 bool runtime_invisible_type_annotations_exists = false;
3340 bool runtime_invisible_annotations_exists = false;
3341 bool parsed_source_debug_ext_annotations_exist = false;
3342 const u1* inner_classes_attribute_start = NULL;
3343 u4 inner_classes_attribute_length = 0;
3344 u2 enclosing_method_class_index = 0;
3345 u2 enclosing_method_method_index = 0;
3346 const u1* nest_members_attribute_start = NULL;
3347 u4 nest_members_attribute_length = 0;
3348
3349 // Iterate over attributes
3350 while (attributes_count--) {
3351 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3352 const u2 attribute_name_index = cfs->get_u2_fast();
3353 const u4 attribute_length = cfs->get_u4_fast();
3354 check_property(
3355 valid_symbol_at(attribute_name_index),
3356 "Attribute name has bad constant pool index %u in class file %s",
3357 attribute_name_index, CHECK);
3358 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3359 if (tag == vmSymbols::tag_source_file()) {
3360 // Check for SourceFile tag
3361 if (_need_verify) {
3362 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3363 }
3364 if (parsed_sourcefile_attribute) {
3365 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3366 } else {
3367 parsed_sourcefile_attribute = true;
3368 }
3369 parse_classfile_sourcefile_attribute(cfs, CHECK);
3370 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3371 // Check for SourceDebugExtension tag
3372 if (parsed_source_debug_ext_annotations_exist) {
3373 classfile_parse_error(
3374 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3375 }
3376 parsed_source_debug_ext_annotations_exist = true;
3377 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3378 } else if (tag == vmSymbols::tag_inner_classes()) {
3379 // Check for InnerClasses tag
3380 if (parsed_innerclasses_attribute) {
3381 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3382 } else {
3383 parsed_innerclasses_attribute = true;
3384 }
3385 inner_classes_attribute_start = cfs->current();
3386 inner_classes_attribute_length = attribute_length;
3387 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3388 } else if (tag == vmSymbols::tag_synthetic()) {
3389 // Check for Synthetic tag
3390 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3391 if (attribute_length != 0) {
3392 classfile_parse_error(
3393 "Invalid Synthetic classfile attribute length %u in class file %s",
3394 attribute_length, CHECK);
3395 }
3396 parse_classfile_synthetic_attribute(CHECK);
3397 } else if (tag == vmSymbols::tag_deprecated()) {
3398 // Check for Deprecatd tag - 4276120
3399 if (attribute_length != 0) {
3400 classfile_parse_error(
3401 "Invalid Deprecated classfile attribute length %u in class file %s",
3402 attribute_length, CHECK);
3403 }
3404 } else if (_major_version >= JAVA_1_5_VERSION) {
3405 if (tag == vmSymbols::tag_signature()) {
3406 if (_generic_signature_index != 0) {
3407 classfile_parse_error(
3408 "Multiple Signature attributes in class file %s", CHECK);
3409 }
3410 if (attribute_length != 2) {
3411 classfile_parse_error(
3412 "Wrong Signature attribute length %u in class file %s",
3413 attribute_length, CHECK);
3414 }
3415 parse_classfile_signature_attribute(cfs, CHECK);
3416 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3417 if (runtime_visible_annotations != NULL) {
3418 classfile_parse_error(
3419 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3420 }
3421 runtime_visible_annotations_length = attribute_length;
3422 runtime_visible_annotations = cfs->current();
3423 assert(runtime_visible_annotations != NULL, "null visible annotations");
3424 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3425 parse_annotations(cp,
3426 runtime_visible_annotations,
3427 runtime_visible_annotations_length,
3428 parsed_annotations,
3429 _loader_data,
3430 CHECK);
3431 cfs->skip_u1_fast(runtime_visible_annotations_length);
3432 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3433 if (runtime_invisible_annotations_exists) {
3434 classfile_parse_error(
3435 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3436 }
3437 runtime_invisible_annotations_exists = true;
3438 if (PreserveAllAnnotations) {
3439 runtime_invisible_annotations_length = attribute_length;
3440 runtime_invisible_annotations = cfs->current();
3441 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3442 }
3443 cfs->skip_u1(attribute_length, CHECK);
3444 } else if (tag == vmSymbols::tag_enclosing_method()) {
3445 if (parsed_enclosingmethod_attribute) {
3446 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3447 } else {
3448 parsed_enclosingmethod_attribute = true;
3449 }
3450 guarantee_property(attribute_length == 4,
3451 "Wrong EnclosingMethod attribute length %u in class file %s",
3452 attribute_length, CHECK);
3453 cfs->guarantee_more(4, CHECK); // class_index, method_index
3454 enclosing_method_class_index = cfs->get_u2_fast();
3455 enclosing_method_method_index = cfs->get_u2_fast();
3456 if (enclosing_method_class_index == 0) {
3457 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3458 }
3459 // Validate the constant pool indices and types
3460 check_property(valid_klass_reference_at(enclosing_method_class_index),
3461 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3462 if (enclosing_method_method_index != 0 &&
3463 (!cp->is_within_bounds(enclosing_method_method_index) ||
3464 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3465 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3466 }
3467 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3468 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3469 if (parsed_bootstrap_methods_attribute) {
3470 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3471 }
3472 parsed_bootstrap_methods_attribute = true;
3473 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3474 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3475 if (runtime_visible_type_annotations != NULL) {
3476 classfile_parse_error(
3477 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3478 }
3479 runtime_visible_type_annotations_length = attribute_length;
3480 runtime_visible_type_annotations = cfs->current();
3481 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3482 // No need for the VM to parse Type annotations
3483 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3484 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3485 if (runtime_invisible_type_annotations_exists) {
3486 classfile_parse_error(
3487 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3488 } else {
3489 runtime_invisible_type_annotations_exists = true;
3490 }
3491 if (PreserveAllAnnotations) {
3492 runtime_invisible_type_annotations_length = attribute_length;
3493 runtime_invisible_type_annotations = cfs->current();
3494 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3495 }
3496 cfs->skip_u1(attribute_length, CHECK);
3497 } else if (_major_version >= JAVA_11_VERSION) {
3498 if (tag == vmSymbols::tag_nest_members()) {
3499 // Check for NestMembers tag
3500 if (parsed_nest_members_attribute) {
3501 classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3502 } else {
3503 parsed_nest_members_attribute = true;
3504 }
3505 if (parsed_nest_host_attribute) {
3506 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3507 }
3508 nest_members_attribute_start = cfs->current();
3509 nest_members_attribute_length = attribute_length;
3510 cfs->skip_u1(nest_members_attribute_length, CHECK);
3511 } else if (tag == vmSymbols::tag_nest_host()) {
3512 if (parsed_nest_host_attribute) {
3513 classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3514 } else {
3515 parsed_nest_host_attribute = true;
3516 }
3517 if (parsed_nest_members_attribute) {
3518 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3519 }
3520 if (_need_verify) {
3521 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3522 }
3523 cfs->guarantee_more(2, CHECK);
3524 u2 class_info_index = cfs->get_u2_fast();
3525 check_property(
3526 valid_klass_reference_at(class_info_index),
3527 "Nest-host class_info_index %u has bad constant type in class file %s",
3528 class_info_index, CHECK);
3529 _nest_host = class_info_index;
3530 } else {
3531 // Unknown attribute
3532 cfs->skip_u1(attribute_length, CHECK);
3533 }
3534 } else {
3535 // Unknown attribute
3536 cfs->skip_u1(attribute_length, CHECK);
3537 }
3538 } else {
3539 // Unknown attribute
3540 cfs->skip_u1(attribute_length, CHECK);
3541 }
3542 }
3543 _class_annotations = assemble_annotations(runtime_visible_annotations,
3544 runtime_visible_annotations_length,
3545 runtime_invisible_annotations,
3546 runtime_invisible_annotations_length,
3547 CHECK);
3548 _class_type_annotations = assemble_annotations(runtime_visible_type_annotations,
3549 runtime_visible_type_annotations_length,
3550 runtime_invisible_type_annotations,
3551 runtime_invisible_type_annotations_length,
3552 CHECK);
3553
3554 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3555 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3556 cfs,
3557 inner_classes_attribute_start,
3558 parsed_innerclasses_attribute,
3559 enclosing_method_class_index,
3560 enclosing_method_method_index,
3561 CHECK);
3562 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3563 guarantee_property(
3564 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3565 "Wrong InnerClasses attribute length in class file %s", CHECK);
3566 }
3567 }
3568
3569 if (parsed_nest_members_attribute) {
3570 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3571 cfs,
3572 nest_members_attribute_start,
3573 CHECK);
3574 if (_need_verify) {
3575 guarantee_property(
3576 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3577 "Wrong NestMembers attribute length in class file %s", CHECK);
3578 }
3579 }
3580
3581 if (_max_bootstrap_specifier_index >= 0) {
3582 guarantee_property(parsed_bootstrap_methods_attribute,
3583 "Missing BootstrapMethods attribute in class file %s", CHECK);
3584 }
3585 }
3586
3587 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3588 assert(k != NULL, "invariant");
3589
3590 if (_synthetic_flag)
3591 k->set_is_synthetic();
3592 if (_sourcefile_index != 0) {
3593 k->set_source_file_name_index(_sourcefile_index);
3594 }
3595 if (_generic_signature_index != 0) {
3596 k->set_generic_signature_index(_generic_signature_index);
3597 }
3598 if (_sde_buffer != NULL) {
3599 k->set_source_debug_extension(_sde_buffer, _sde_length);
3600 }
3601 }
3602
3603 // Create the Annotations object that will
3604 // hold the annotations array for the Klass.
3605 void ClassFileParser::create_combined_annotations(TRAPS) {
3606 if (_class_annotations == NULL &&
3607 _class_type_annotations == NULL &&
3608 _fields_annotations == NULL &&
3609 _fields_type_annotations == NULL) {
3610 // Don't create the Annotations object unnecessarily.
3611 return;
3612 }
3613
3614 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3615 annotations->set_class_annotations(_class_annotations);
3616 annotations->set_class_type_annotations(_class_type_annotations);
3617 annotations->set_fields_annotations(_fields_annotations);
3618 annotations->set_fields_type_annotations(_fields_type_annotations);
3619
3620 // This is the Annotations object that will be
3621 // assigned to InstanceKlass being constructed.
3622 _combined_annotations = annotations;
3623
3624 // The annotations arrays below has been transfered the
3625 // _combined_annotations so these fields can now be cleared.
3626 _class_annotations = NULL;
3627 _class_type_annotations = NULL;
3628 _fields_annotations = NULL;
3629 _fields_type_annotations = NULL;
3630 }
3631
3632 // Transfer ownership of metadata allocated to the InstanceKlass.
3633 void ClassFileParser::apply_parsed_class_metadata(
3634 InstanceKlass* this_klass,
3635 int java_fields_count, TRAPS) {
3636 assert(this_klass != NULL, "invariant");
3637
3638 _cp->set_pool_holder(this_klass);
3639 this_klass->set_constants(_cp);
3640 this_klass->set_fields(_fields, java_fields_count);
3641 this_klass->set_methods(_methods);
3642 this_klass->set_inner_classes(_inner_classes);
3643 this_klass->set_nest_members(_nest_members);
3644 this_klass->set_nest_host_index(_nest_host);
3645 this_klass->set_local_interfaces(_local_interfaces);
3646 this_klass->set_annotations(_combined_annotations);
3647 // Delay the setting of _transitive_interfaces until after initialize_supers() in
3648 // fill_instance_klass(). It is because the _transitive_interfaces may be shared with
3649 // its _super. If an OOM occurs while loading the current klass, its _super field
3650 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3651 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3652 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3653
3654 // Clear out these fields so they don't get deallocated by the destructor
3655 clear_class_metadata();
3656 }
3657
3658 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3659 int runtime_visible_annotations_length,
3660 const u1* const runtime_invisible_annotations,
3661 int runtime_invisible_annotations_length,
3662 TRAPS) {
3663 AnnotationArray* annotations = NULL;
3664 if (runtime_visible_annotations != NULL ||
3665 runtime_invisible_annotations != NULL) {
3666 annotations = MetadataFactory::new_array<u1>(_loader_data,
3667 runtime_visible_annotations_length +
3668 runtime_invisible_annotations_length,
3669 CHECK_(annotations));
3670 if (runtime_visible_annotations != NULL) {
3671 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3672 annotations->at_put(i, runtime_visible_annotations[i]);
3673 }
3674 }
3675 if (runtime_invisible_annotations != NULL) {
3676 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3677 int append = runtime_visible_annotations_length+i;
3678 annotations->at_put(append, runtime_invisible_annotations[i]);
3679 }
3680 }
3681 }
3682 return annotations;
3683 }
3684
3685 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3686 const int super_class_index,
3687 const bool need_verify,
3688 TRAPS) {
3689 assert(cp != NULL, "invariant");
3690 const InstanceKlass* super_klass = NULL;
3691
3692 if (super_class_index == 0) {
3693 check_property(_class_name == vmSymbols::java_lang_Object(),
3694 "Invalid superclass index %u in class file %s",
3695 super_class_index,
3696 CHECK_NULL);
3697 } else {
3698 check_property(valid_klass_reference_at(super_class_index),
3699 "Invalid superclass index %u in class file %s",
3700 super_class_index,
3701 CHECK_NULL);
3702 // The class name should be legal because it is checked when parsing constant pool.
3703 // However, make sure it is not an array type.
3704 bool is_array = false;
3705 if (cp->tag_at(super_class_index).is_klass()) {
3706 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3707 if (need_verify)
3708 is_array = super_klass->is_array_klass();
3709 } else if (need_verify) {
3710 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3711 }
3712 if (need_verify) {
3713 guarantee_property(!is_array,
3714 "Bad superclass name in class file %s", CHECK_NULL);
3715 }
3716 }
3717 return super_klass;
3718 }
3719
3720 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3721 unsigned int nonstatic_oop_map_count,
3722 int first_nonstatic_oop_offset) {
3723
3724 unsigned int map_count =
3725 NULL == super ? 0 : super->nonstatic_oop_map_count();
3726 if (nonstatic_oop_map_count > 0) {
3727 // We have oops to add to map
3728 if (map_count == 0) {
3729 map_count = nonstatic_oop_map_count;
3730 }
3731 else {
3732 // Check whether we should add a new map block or whether the last one can
3733 // be extended
3734 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3735 const OopMapBlock* const last_map = first_map + map_count - 1;
3736
3737 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3738 if (next_offset == first_nonstatic_oop_offset) {
3739 // There is no gap bettwen superklass's last oop field and first
3740 // local oop field, merge maps.
3741 nonstatic_oop_map_count -= 1;
3742 }
3743 else {
3744 // Superklass didn't end with a oop field, add extra maps
3745 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3746 }
3747 map_count += nonstatic_oop_map_count;
3748 }
3749 }
3750 return map_count;
3751 }
3752
3753 #ifndef PRODUCT
3754 static void print_field_layout(const Symbol* name,
3755 Array<u2>* fields,
3756 const constantPoolHandle& cp,
3757 int instance_size,
3758 int instance_fields_start,
3759 int instance_fields_end,
3760 int static_fields_end) {
3761
3762 assert(name != NULL, "invariant");
3763
3764 tty->print("%s: field layout\n", name->as_klass_external_name());
3765 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3766 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3767 if (!fs.access_flags().is_static()) {
3768 tty->print(" @%3d \"%s\" %s\n",
3769 fs.offset(),
3770 fs.name()->as_klass_external_name(),
3771 fs.signature()->as_klass_external_name());
3772 }
3773 }
3774 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3775 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3776 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3777 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3778 if (fs.access_flags().is_static()) {
3779 tty->print(" @%3d \"%s\" %s\n",
3780 fs.offset(),
3781 fs.name()->as_klass_external_name(),
3782 fs.signature()->as_klass_external_name());
3783 }
3784 }
3785 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3786 tty->print("\n");
3787 }
3788 #endif
3789
3790 // Values needed for oopmap and InstanceKlass creation
3791 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3792 public:
3793 int* nonstatic_oop_offsets;
3794 unsigned int* nonstatic_oop_counts;
3795 unsigned int nonstatic_oop_map_count;
3796 unsigned int total_oop_map_count;
3797 int instance_size;
3798 int nonstatic_field_size;
3799 int static_field_size;
3800 bool has_nonstatic_fields;
3801 };
3802
3803 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3804 void ClassFileParser::layout_fields(ConstantPool* cp,
3805 const FieldAllocationCount* fac,
3806 const ClassAnnotationCollector* parsed_annotations,
3807 FieldLayoutInfo* info,
3808 TRAPS) {
3809
3810 assert(cp != NULL, "invariant");
3811
3812 // Field size and offset computation
3813 int nonstatic_field_size = _super_klass == NULL ? 0 :
3814 _super_klass->nonstatic_field_size();
3815
3816 // Count the contended fields by type.
3817 //
3818 // We ignore static fields, because @Contended is not supported for them.
3819 // The layout code below will also ignore the static fields.
3820 int nonstatic_contended_count = 0;
3821 FieldAllocationCount fac_contended;
3822 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3823 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3824 if (fs.is_contended()) {
3825 fac_contended.count[atype]++;
3826 if (!fs.access_flags().is_static()) {
3827 nonstatic_contended_count++;
3828 }
3829 }
3830 }
3831
3832
3833 // Calculate the starting byte offsets
3834 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3835 int next_static_double_offset = next_static_oop_offset +
3836 ((fac->count[STATIC_OOP]) * heapOopSize);
3837 if (fac->count[STATIC_DOUBLE]) {
3838 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3839 }
3840
3841 int next_static_word_offset = next_static_double_offset +
3842 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3843 int next_static_short_offset = next_static_word_offset +
3844 ((fac->count[STATIC_WORD]) * BytesPerInt);
3845 int next_static_byte_offset = next_static_short_offset +
3846 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3847
3848 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3849 nonstatic_field_size * heapOopSize;
3850
3851 int next_nonstatic_field_offset = nonstatic_fields_start;
3852
3853 const bool is_contended_class = parsed_annotations->is_contended();
3854
3855 // Class is contended, pad before all the fields
3856 if (is_contended_class) {
3857 next_nonstatic_field_offset += ContendedPaddingWidth;
3858 }
3859
3860 // Compute the non-contended fields count.
3861 // The packing code below relies on these counts to determine if some field
3862 // can be squeezed into the alignment gap. Contended fields are obviously
3863 // exempt from that.
3864 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3865 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3866 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3867 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3868 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3869
3870 // Total non-static fields count, including every contended field
3871 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3872 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3873 fac->count[NONSTATIC_OOP];
3874
3875 const bool super_has_nonstatic_fields =
3876 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3877 const bool has_nonstatic_fields =
3878 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3879
3880
3881 // Prepare list of oops for oop map generation.
3882 //
3883 // "offset" and "count" lists are describing the set of contiguous oop
3884 // regions. offset[i] is the start of the i-th region, which then has
3885 // count[i] oops following. Before we know how many regions are required,
3886 // we pessimistically allocate the maps to fit all the oops into the
3887 // distinct regions.
3888 //
3889 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3890 // to figure out if we still need to do this.
3891 unsigned int nonstatic_oop_map_count = 0;
3892 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3893
3894 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3895 THREAD, int, max_nonstatic_oop_maps);
3896 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3897 THREAD, unsigned int, max_nonstatic_oop_maps);
3898
3899 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3900
3901 bool compact_fields = CompactFields;
3902 int allocation_style = FieldsAllocationStyle;
3903 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3904 assert(false, "0 <= FieldsAllocationStyle <= 2");
3905 allocation_style = 1; // Optimistic
3906 }
3907
3908 // The next classes have predefined hard-coded fields offsets
3909 // (see in JavaClasses::compute_hard_coded_offsets()).
3910 // Use default fields allocation order for them.
3911 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3912 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3913 _class_name == vmSymbols::java_lang_Class() ||
3914 _class_name == vmSymbols::java_lang_ClassLoader() ||
3915 _class_name == vmSymbols::java_lang_ref_Reference() ||
3916 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3917 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3918 _class_name == vmSymbols::java_lang_String() ||
3919 _class_name == vmSymbols::java_lang_Throwable() ||
3920 _class_name == vmSymbols::java_lang_Boolean() ||
3921 _class_name == vmSymbols::java_lang_Character() ||
3922 _class_name == vmSymbols::java_lang_Float() ||
3923 _class_name == vmSymbols::java_lang_Double() ||
3924 _class_name == vmSymbols::java_lang_Byte() ||
3925 _class_name == vmSymbols::java_lang_Short() ||
3926 _class_name == vmSymbols::java_lang_Integer() ||
3927 _class_name == vmSymbols::java_lang_Long())) {
3928 allocation_style = 0; // Allocate oops first
3929 compact_fields = false; // Don't compact fields
3930 }
3931
3932 int next_nonstatic_oop_offset = 0;
3933 int next_nonstatic_double_offset = 0;
3934
3935 // Rearrange fields for a given allocation style
3936 if( allocation_style == 0 ) {
3937 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3938 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3939 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3940 (nonstatic_oop_count * heapOopSize);
3941 } else if( allocation_style == 1 ) {
3942 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3943 next_nonstatic_double_offset = next_nonstatic_field_offset;
3944 } else if( allocation_style == 2 ) {
3945 // Fields allocation: oops fields in super and sub classes are together.
3946 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3947 _super_klass->nonstatic_oop_map_size() > 0 ) {
3948 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3949 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3950 const OopMapBlock* const last_map = first_map + map_count - 1;
3951 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3952 if (next_offset == next_nonstatic_field_offset) {
3953 allocation_style = 0; // allocate oops first
3954 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3955 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3956 (nonstatic_oop_count * heapOopSize);
3957 }
3958 }
3959 if( allocation_style == 2 ) {
3960 allocation_style = 1; // allocate oops last
3961 next_nonstatic_double_offset = next_nonstatic_field_offset;
3962 }
3963 } else {
3964 ShouldNotReachHere();
3965 }
3966
3967 int nonstatic_oop_space_count = 0;
3968 int nonstatic_word_space_count = 0;
3969 int nonstatic_short_space_count = 0;
3970 int nonstatic_byte_space_count = 0;
3971 int nonstatic_oop_space_offset = 0;
3972 int nonstatic_word_space_offset = 0;
3973 int nonstatic_short_space_offset = 0;
3974 int nonstatic_byte_space_offset = 0;
3975
3976 // Try to squeeze some of the fields into the gaps due to
3977 // long/double alignment.
3978 if (nonstatic_double_count > 0) {
3979 int offset = next_nonstatic_double_offset;
3980 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
3981 if (compact_fields && offset != next_nonstatic_double_offset) {
3982 // Allocate available fields into the gap before double field.
3983 int length = next_nonstatic_double_offset - offset;
3984 assert(length == BytesPerInt, "");
3985 nonstatic_word_space_offset = offset;
3986 if (nonstatic_word_count > 0) {
3987 nonstatic_word_count -= 1;
3988 nonstatic_word_space_count = 1; // Only one will fit
3989 length -= BytesPerInt;
3990 offset += BytesPerInt;
3991 }
3992 nonstatic_short_space_offset = offset;
3993 while (length >= BytesPerShort && nonstatic_short_count > 0) {
3994 nonstatic_short_count -= 1;
3995 nonstatic_short_space_count += 1;
3996 length -= BytesPerShort;
3997 offset += BytesPerShort;
3998 }
3999 nonstatic_byte_space_offset = offset;
4000 while (length > 0 && nonstatic_byte_count > 0) {
4001 nonstatic_byte_count -= 1;
4002 nonstatic_byte_space_count += 1;
4003 length -= 1;
4004 }
4005 // Allocate oop field in the gap if there are no other fields for that.
4006 nonstatic_oop_space_offset = offset;
4007 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4008 allocation_style != 0) { // when oop fields not first
4009 nonstatic_oop_count -= 1;
4010 nonstatic_oop_space_count = 1; // Only one will fit
4011 length -= heapOopSize;
4012 offset += heapOopSize;
4013 }
4014 }
4015 }
4016
4017 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4018 (nonstatic_double_count * BytesPerLong);
4019 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4020 (nonstatic_word_count * BytesPerInt);
4021 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4022 (nonstatic_short_count * BytesPerShort);
4023 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4024 nonstatic_byte_count;
4025
4026 // let oops jump before padding with this allocation style
4027 if( allocation_style == 1 ) {
4028 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4029 if( nonstatic_oop_count > 0 ) {
4030 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4031 }
4032 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4033 }
4034
4035 // Iterate over fields again and compute correct offsets.
4036 // The field allocation type was temporarily stored in the offset slot.
4037 // oop fields are located before non-oop fields (static and non-static).
4038 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4039
4040 // skip already laid out fields
4041 if (fs.is_offset_set()) continue;
4042
4043 // contended instance fields are handled below
4044 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4045
4046 int real_offset = 0;
4047 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4048
4049 // pack the rest of the fields
4050 switch (atype) {
4051 case STATIC_OOP:
4052 real_offset = next_static_oop_offset;
4053 next_static_oop_offset += heapOopSize;
4054 break;
4055 case STATIC_BYTE:
4056 real_offset = next_static_byte_offset;
4057 next_static_byte_offset += 1;
4058 break;
4059 case STATIC_SHORT:
4060 real_offset = next_static_short_offset;
4061 next_static_short_offset += BytesPerShort;
4062 break;
4063 case STATIC_WORD:
4064 real_offset = next_static_word_offset;
4065 next_static_word_offset += BytesPerInt;
4066 break;
4067 case STATIC_DOUBLE:
4068 real_offset = next_static_double_offset;
4069 next_static_double_offset += BytesPerLong;
4070 break;
4071 case NONSTATIC_OOP:
4072 if( nonstatic_oop_space_count > 0 ) {
4073 real_offset = nonstatic_oop_space_offset;
4074 nonstatic_oop_space_offset += heapOopSize;
4075 nonstatic_oop_space_count -= 1;
4076 } else {
4077 real_offset = next_nonstatic_oop_offset;
4078 next_nonstatic_oop_offset += heapOopSize;
4079 }
4080
4081 // Record this oop in the oop maps
4082 if( nonstatic_oop_map_count > 0 &&
4083 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4084 real_offset -
4085 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4086 heapOopSize ) {
4087 // This oop is adjacent to the previous one, add to current oop map
4088 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4089 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4090 } else {
4091 // This oop is not adjacent to the previous one, create new oop map
4092 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4093 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4094 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4095 nonstatic_oop_map_count += 1;
4096 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4097 first_nonstatic_oop_offset = real_offset;
4098 }
4099 }
4100 break;
4101 case NONSTATIC_BYTE:
4102 if( nonstatic_byte_space_count > 0 ) {
4103 real_offset = nonstatic_byte_space_offset;
4104 nonstatic_byte_space_offset += 1;
4105 nonstatic_byte_space_count -= 1;
4106 } else {
4107 real_offset = next_nonstatic_byte_offset;
4108 next_nonstatic_byte_offset += 1;
4109 }
4110 break;
4111 case NONSTATIC_SHORT:
4112 if( nonstatic_short_space_count > 0 ) {
4113 real_offset = nonstatic_short_space_offset;
4114 nonstatic_short_space_offset += BytesPerShort;
4115 nonstatic_short_space_count -= 1;
4116 } else {
4117 real_offset = next_nonstatic_short_offset;
4118 next_nonstatic_short_offset += BytesPerShort;
4119 }
4120 break;
4121 case NONSTATIC_WORD:
4122 if( nonstatic_word_space_count > 0 ) {
4123 real_offset = nonstatic_word_space_offset;
4124 nonstatic_word_space_offset += BytesPerInt;
4125 nonstatic_word_space_count -= 1;
4126 } else {
4127 real_offset = next_nonstatic_word_offset;
4128 next_nonstatic_word_offset += BytesPerInt;
4129 }
4130 break;
4131 case NONSTATIC_DOUBLE:
4132 real_offset = next_nonstatic_double_offset;
4133 next_nonstatic_double_offset += BytesPerLong;
4134 break;
4135 default:
4136 ShouldNotReachHere();
4137 }
4138 fs.set_offset(real_offset);
4139 }
4140
4141
4142 // Handle the contended cases.
4143 //
4144 // Each contended field should not intersect the cache line with another contended field.
4145 // In the absence of alignment information, we end up with pessimistically separating
4146 // the fields with full-width padding.
4147 //
4148 // Additionally, this should not break alignment for the fields, so we round the alignment up
4149 // for each field.
4150 if (nonstatic_contended_count > 0) {
4151
4152 // if there is at least one contended field, we need to have pre-padding for them
4153 next_nonstatic_padded_offset += ContendedPaddingWidth;
4154
4155 // collect all contended groups
4156 ResourceBitMap bm(cp->size());
4157 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4158 // skip already laid out fields
4159 if (fs.is_offset_set()) continue;
4160
4161 if (fs.is_contended()) {
4162 bm.set_bit(fs.contended_group());
4163 }
4164 }
4165
4166 int current_group = -1;
4167 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4168
4169 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4170
4171 // skip already laid out fields
4172 if (fs.is_offset_set()) continue;
4173
4174 // skip non-contended fields and fields from different group
4175 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4176
4177 // handle statics below
4178 if (fs.access_flags().is_static()) continue;
4179
4180 int real_offset = 0;
4181 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4182
4183 switch (atype) {
4184 case NONSTATIC_BYTE:
4185 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4186 real_offset = next_nonstatic_padded_offset;
4187 next_nonstatic_padded_offset += 1;
4188 break;
4189
4190 case NONSTATIC_SHORT:
4191 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4192 real_offset = next_nonstatic_padded_offset;
4193 next_nonstatic_padded_offset += BytesPerShort;
4194 break;
4195
4196 case NONSTATIC_WORD:
4197 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4198 real_offset = next_nonstatic_padded_offset;
4199 next_nonstatic_padded_offset += BytesPerInt;
4200 break;
4201
4202 case NONSTATIC_DOUBLE:
4203 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4204 real_offset = next_nonstatic_padded_offset;
4205 next_nonstatic_padded_offset += BytesPerLong;
4206 break;
4207
4208 case NONSTATIC_OOP:
4209 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4210 real_offset = next_nonstatic_padded_offset;
4211 next_nonstatic_padded_offset += heapOopSize;
4212
4213 // Record this oop in the oop maps
4214 if( nonstatic_oop_map_count > 0 &&
4215 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4216 real_offset -
4217 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4218 heapOopSize ) {
4219 // This oop is adjacent to the previous one, add to current oop map
4220 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4221 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4222 } else {
4223 // This oop is not adjacent to the previous one, create new oop map
4224 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4225 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4226 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4227 nonstatic_oop_map_count += 1;
4228 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4229 first_nonstatic_oop_offset = real_offset;
4230 }
4231 }
4232 break;
4233
4234 default:
4235 ShouldNotReachHere();
4236 }
4237
4238 if (fs.contended_group() == 0) {
4239 // Contended group defines the equivalence class over the fields:
4240 // the fields within the same contended group are not inter-padded.
4241 // The only exception is default group, which does not incur the
4242 // equivalence, and so requires intra-padding.
4243 next_nonstatic_padded_offset += ContendedPaddingWidth;
4244 }
4245
4246 fs.set_offset(real_offset);
4247 } // for
4248
4249 // Start laying out the next group.
4250 // Note that this will effectively pad the last group in the back;
4251 // this is expected to alleviate memory contention effects for
4252 // subclass fields and/or adjacent object.
4253 // If this was the default group, the padding is already in place.
4254 if (current_group != 0) {
4255 next_nonstatic_padded_offset += ContendedPaddingWidth;
4256 }
4257 }
4258
4259 // handle static fields
4260 }
4261
4262 // Entire class is contended, pad in the back.
4263 // This helps to alleviate memory contention effects for subclass fields
4264 // and/or adjacent object.
4265 if (is_contended_class) {
4266 next_nonstatic_padded_offset += ContendedPaddingWidth;
4267 }
4268
4269 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4270
4271 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, heapOopSize);
4272 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4273 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4274
4275 int static_field_size = (static_fields_end -
4276 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4277 nonstatic_field_size = nonstatic_field_size +
4278 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4279
4280 int instance_size = align_object_size(instance_end / wordSize);
4281
4282 assert(instance_size == align_object_size(align_up(
4283 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4284 wordSize) / wordSize), "consistent layout helper value");
4285
4286 // Invariant: nonstatic_field end/start should only change if there are
4287 // nonstatic fields in the class, or if the class is contended. We compare
4288 // against the non-aligned value, so that end alignment will not fail the
4289 // assert without actually having the fields.
4290 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4291 is_contended_class ||
4292 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4293
4294 // Number of non-static oop map blocks allocated at end of klass.
4295 const unsigned int total_oop_map_count =
4296 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4297 first_nonstatic_oop_offset);
4298
4299 #ifndef PRODUCT
4300 if (PrintFieldLayout) {
4301 print_field_layout(_class_name,
4302 _fields,
4303 cp,
4304 instance_size,
4305 nonstatic_fields_start,
4306 nonstatic_fields_end,
4307 static_fields_end);
4308 }
4309
4310 #endif
4311 // Pass back information needed for InstanceKlass creation
4312 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4313 info->nonstatic_oop_counts = nonstatic_oop_counts;
4314 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4315 info->total_oop_map_count = total_oop_map_count;
4316 info->instance_size = instance_size;
4317 info->static_field_size = static_field_size;
4318 info->nonstatic_field_size = nonstatic_field_size;
4319 info->has_nonstatic_fields = has_nonstatic_fields;
4320 }
4321
4322 static void fill_oop_maps(const InstanceKlass* k,
4323 unsigned int nonstatic_oop_map_count,
4324 const int* nonstatic_oop_offsets,
4325 const unsigned int* nonstatic_oop_counts) {
4326
4327 assert(k != NULL, "invariant");
4328
4329 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4330 const InstanceKlass* const super = k->superklass();
4331 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4332 if (super_count > 0) {
4333 // Copy maps from superklass
4334 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4335 for (unsigned int i = 0; i < super_count; ++i) {
4336 *this_oop_map++ = *super_oop_map++;
4337 }
4338 }
4339
4340 if (nonstatic_oop_map_count > 0) {
4341 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4342 // The counts differ because there is no gap between superklass's last oop
4343 // field and the first local oop field. Extend the last oop map copied
4344 // from the superklass instead of creating new one.
4345 nonstatic_oop_map_count--;
4346 nonstatic_oop_offsets++;
4347 this_oop_map--;
4348 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4349 this_oop_map++;
4350 }
4351
4352 // Add new map blocks, fill them
4353 while (nonstatic_oop_map_count-- > 0) {
4354 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4355 this_oop_map->set_count(*nonstatic_oop_counts++);
4356 this_oop_map++;
4357 }
4358 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4359 this_oop_map, "sanity");
4360 }
4361 }
4362
4363
4364 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4365 assert(ik != NULL, "invariant");
4366
4367 const Klass* const super = ik->super();
4368
4369 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4370 // in which case we don't have to register objects as finalizable
4371 if (!_has_empty_finalizer) {
4372 if (_has_finalizer ||
4373 (super != NULL && super->has_finalizer())) {
4374 ik->set_has_finalizer();
4375 }
4376 }
4377
4378 #ifdef ASSERT
4379 bool f = false;
4380 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4381 vmSymbols::void_method_signature());
4382 if (m != NULL && !m->is_empty_method()) {
4383 f = true;
4384 }
4385
4386 // Spec doesn't prevent agent from redefinition of empty finalizer.
4387 // Despite the fact that it's generally bad idea and redefined finalizer
4388 // will not work as expected we shouldn't abort vm in this case
4389 if (!ik->has_redefined_this_or_super()) {
4390 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4391 }
4392 #endif
4393
4394 // Check if this klass supports the java.lang.Cloneable interface
4395 if (SystemDictionary::Cloneable_klass_loaded()) {
4396 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4397 ik->set_is_cloneable();
4398 }
4399 }
4400
4401 // Check if this klass has a vanilla default constructor
4402 if (super == NULL) {
4403 // java.lang.Object has empty default constructor
4404 ik->set_has_vanilla_constructor();
4405 } else {
4406 if (super->has_vanilla_constructor() &&
4407 _has_vanilla_constructor) {
4408 ik->set_has_vanilla_constructor();
4409 }
4410 #ifdef ASSERT
4411 bool v = false;
4412 if (super->has_vanilla_constructor()) {
4413 const Method* const constructor =
4414 ik->find_method(vmSymbols::object_initializer_name(),
4415 vmSymbols::void_method_signature());
4416 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4417 v = true;
4418 }
4419 }
4420 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4421 #endif
4422 }
4423
4424 // If it cannot be fast-path allocated, set a bit in the layout helper.
4425 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4426 assert(ik->size_helper() > 0, "layout_helper is initialized");
4427 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4428 || ik->is_abstract() || ik->is_interface()
4429 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4430 || ik->size_helper() >= FastAllocateSizeLimit) {
4431 // Forbid fast-path allocation.
4432 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4433 ik->set_layout_helper(lh);
4434 }
4435 }
4436
4437 // utility methods for appending an array with check for duplicates
4438
4439 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4440 const Array<InstanceKlass*>* const ifs) {
4441 // iterate over new interfaces
4442 for (int i = 0; i < ifs->length(); i++) {
4443 InstanceKlass* const e = ifs->at(i);
4444 assert(e->is_klass() && e->is_interface(), "just checking");
4445 // add new interface
4446 result->append_if_missing(e);
4447 }
4448 }
4449
4450 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4451 Array<InstanceKlass*>* local_ifs,
4452 ClassLoaderData* loader_data,
4453 TRAPS) {
4454 assert(local_ifs != NULL, "invariant");
4455 assert(loader_data != NULL, "invariant");
4456
4457 // Compute maximum size for transitive interfaces
4458 int max_transitive_size = 0;
4459 int super_size = 0;
4460 // Add superclass transitive interfaces size
4461 if (super != NULL) {
4462 super_size = super->transitive_interfaces()->length();
4463 max_transitive_size += super_size;
4464 }
4465 // Add local interfaces' super interfaces
4466 const int local_size = local_ifs->length();
4467 for (int i = 0; i < local_size; i++) {
4468 InstanceKlass* const l = local_ifs->at(i);
4469 max_transitive_size += l->transitive_interfaces()->length();
4470 }
4471 // Finally add local interfaces
4472 max_transitive_size += local_size;
4473 // Construct array
4474 if (max_transitive_size == 0) {
4475 // no interfaces, use canonicalized array
4476 return Universe::the_empty_instance_klass_array();
4477 } else if (max_transitive_size == super_size) {
4478 // no new local interfaces added, share superklass' transitive interface array
4479 return super->transitive_interfaces();
4480 } else if (max_transitive_size == local_size) {
4481 // only local interfaces added, share local interface array
4482 return local_ifs;
4483 } else {
4484 ResourceMark rm;
4485 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4486
4487 // Copy down from superclass
4488 if (super != NULL) {
4489 append_interfaces(result, super->transitive_interfaces());
4490 }
4491
4492 // Copy down from local interfaces' superinterfaces
4493 for (int i = 0; i < local_size; i++) {
4494 InstanceKlass* const l = local_ifs->at(i);
4495 append_interfaces(result, l->transitive_interfaces());
4496 }
4497 // Finally add local interfaces
4498 append_interfaces(result, local_ifs);
4499
4500 // length will be less than the max_transitive_size if duplicates were removed
4501 const int length = result->length();
4502 assert(length <= max_transitive_size, "just checking");
4503 Array<InstanceKlass*>* const new_result =
4504 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4505 for (int i = 0; i < length; i++) {
4506 InstanceKlass* const e = result->at(i);
4507 assert(e != NULL, "just checking");
4508 new_result->at_put(i, e);
4509 }
4510 return new_result;
4511 }
4512 }
4513
4514 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4515 assert(this_klass != NULL, "invariant");
4516 const Klass* const super = this_klass->super();
4517 if (super != NULL) {
4518
4519 // If the loader is not the boot loader then throw an exception if its
4520 // superclass is in package jdk.internal.reflect and its loader is not a
4521 // special reflection class loader
4522 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4523 assert(super->is_instance_klass(), "super is not instance klass");
4524 PackageEntry* super_package = super->package();
4525 if (super_package != NULL &&
4526 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4527 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4528 ResourceMark rm(THREAD);
4529 Exceptions::fthrow(
4530 THREAD_AND_LOCATION,
4531 vmSymbols::java_lang_IllegalAccessError(),
4532 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4533 this_klass->external_name(),
4534 this_klass->class_loader_data()->loader_name_and_id(),
4535 super->external_name());
4536 return;
4537 }
4538 }
4539
4540 Reflection::VerifyClassAccessResults vca_result =
4541 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4542 if (vca_result != Reflection::ACCESS_OK) {
4543 ResourceMark rm(THREAD);
4544 char* msg = Reflection::verify_class_access_msg(this_klass,
4545 InstanceKlass::cast(super),
4546 vca_result);
4547 if (msg == NULL) {
4548 bool same_module = (this_klass->module() == super->module());
4549 Exceptions::fthrow(
4550 THREAD_AND_LOCATION,
4551 vmSymbols::java_lang_IllegalAccessError(),
4552 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4553 this_klass->external_name(),
4554 super->is_abstract() ? "abstract " : "",
4555 super->external_name(),
4556 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4557 (same_module) ? "" : "; ",
4558 (same_module) ? "" : super->class_in_module_of_loader());
4559 } else {
4560 // Add additional message content.
4561 Exceptions::fthrow(
4562 THREAD_AND_LOCATION,
4563 vmSymbols::java_lang_IllegalAccessError(),
4564 "superclass access check failed: %s",
4565 msg);
4566 }
4567 }
4568 }
4569 }
4570
4571
4572 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4573 assert(this_klass != NULL, "invariant");
4574 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4575 const int lng = local_interfaces->length();
4576 for (int i = lng - 1; i >= 0; i--) {
4577 InstanceKlass* const k = local_interfaces->at(i);
4578 assert (k != NULL && k->is_interface(), "invalid interface");
4579 Reflection::VerifyClassAccessResults vca_result =
4580 Reflection::verify_class_access(this_klass, k, false);
4581 if (vca_result != Reflection::ACCESS_OK) {
4582 ResourceMark rm(THREAD);
4583 char* msg = Reflection::verify_class_access_msg(this_klass,
4584 k,
4585 vca_result);
4586 if (msg == NULL) {
4587 bool same_module = (this_klass->module() == k->module());
4588 Exceptions::fthrow(
4589 THREAD_AND_LOCATION,
4590 vmSymbols::java_lang_IllegalAccessError(),
4591 "class %s cannot access its superinterface %s (%s%s%s)",
4592 this_klass->external_name(),
4593 k->external_name(),
4594 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4595 (same_module) ? "" : "; ",
4596 (same_module) ? "" : k->class_in_module_of_loader());
4597 } else {
4598 // Add additional message content.
4599 Exceptions::fthrow(
4600 THREAD_AND_LOCATION,
4601 vmSymbols::java_lang_IllegalAccessError(),
4602 "superinterface check failed: %s",
4603 msg);
4604 }
4605 }
4606 }
4607 }
4608
4609
4610 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4611 assert(this_klass != NULL, "invariant");
4612 const Array<Method*>* const methods = this_klass->methods();
4613 const int num_methods = methods->length();
4614
4615 // go thru each method and check if it overrides a final method
4616 for (int index = 0; index < num_methods; index++) {
4617 const Method* const m = methods->at(index);
4618
4619 // skip private, static, and <init> methods
4620 if ((!m->is_private() && !m->is_static()) &&
4621 (m->name() != vmSymbols::object_initializer_name())) {
4622
4623 const Symbol* const name = m->name();
4624 const Symbol* const signature = m->signature();
4625 const Klass* k = this_klass->super();
4626 const Method* super_m = NULL;
4627 while (k != NULL) {
4628 // skip supers that don't have final methods.
4629 if (k->has_final_method()) {
4630 // lookup a matching method in the super class hierarchy
4631 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4632 if (super_m == NULL) {
4633 break; // didn't find any match; get out
4634 }
4635
4636 if (super_m->is_final() && !super_m->is_static() &&
4637 !super_m->access_flags().is_private()) {
4638 // matching method in super is final, and not static or private
4639 bool can_access = Reflection::verify_member_access(this_klass,
4640 super_m->method_holder(),
4641 super_m->method_holder(),
4642 super_m->access_flags(),
4643 false, false, CHECK);
4644 if (can_access) {
4645 // this class can access super final method and therefore override
4646 ResourceMark rm(THREAD);
4647 Exceptions::fthrow(THREAD_AND_LOCATION,
4648 vmSymbols::java_lang_VerifyError(),
4649 "class %s overrides final method %s.%s%s",
4650 this_klass->external_name(),
4651 super_m->method_holder()->external_name(),
4652 name->as_C_string(),
4653 signature->as_C_string()
4654 );
4655 return;
4656 }
4657 }
4658
4659 // continue to look from super_m's holder's super.
4660 k = super_m->method_holder()->super();
4661 continue;
4662 }
4663
4664 k = k->super();
4665 }
4666 }
4667 }
4668 }
4669
4670
4671 // assumes that this_klass is an interface
4672 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4673 assert(this_klass != NULL, "invariant");
4674 assert(this_klass->is_interface(), "not an interface");
4675 const Array<Method*>* methods = this_klass->methods();
4676 const int num_methods = methods->length();
4677
4678 for (int index = 0; index < num_methods; index++) {
4679 const Method* const m = methods->at(index);
4680 // if m is static and not the init method, throw a verify error
4681 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4682 ResourceMark rm(THREAD);
4683 Exceptions::fthrow(
4684 THREAD_AND_LOCATION,
4685 vmSymbols::java_lang_VerifyError(),
4686 "Illegal static method %s in interface %s",
4687 m->name()->as_C_string(),
4688 this_klass->external_name()
4689 );
4690 return;
4691 }
4692 }
4693 }
4694
4695 // utility methods for format checking
4696
4697 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4698 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4699 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4700 if (is_module) {
4701 ResourceMark rm(THREAD);
4702 Exceptions::fthrow(
4703 THREAD_AND_LOCATION,
4704 vmSymbols::java_lang_NoClassDefFoundError(),
4705 "%s is not a class because access_flag ACC_MODULE is set",
4706 _class_name->as_C_string());
4707 return;
4708 }
4709
4710 if (!_need_verify) { return; }
4711
4712 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4713 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4714 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4715 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4716 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4717 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4718 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4719
4720 if ((is_abstract && is_final) ||
4721 (is_interface && !is_abstract) ||
4722 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4723 (!is_interface && major_gte_15 && is_annotation)) {
4724 ResourceMark rm(THREAD);
4725 Exceptions::fthrow(
4726 THREAD_AND_LOCATION,
4727 vmSymbols::java_lang_ClassFormatError(),
4728 "Illegal class modifiers in class %s: 0x%X",
4729 _class_name->as_C_string(), flags
4730 );
4731 return;
4732 }
4733 }
4734
4735 static bool has_illegal_visibility(jint flags) {
4736 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4737 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4738 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4739
4740 return ((is_public && is_protected) ||
4741 (is_public && is_private) ||
4742 (is_protected && is_private));
4743 }
4744
4745 // A legal major_version.minor_version must be one of the following:
4746 //
4747 // Major_version >= 45 and major_version < 56, any minor_version.
4748 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4749 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4750 //
4751 static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4752 ResourceMark rm(THREAD);
4753 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4754 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4755 Exceptions::fthrow(
4756 THREAD_AND_LOCATION,
4757 vmSymbols::java_lang_UnsupportedClassVersionError(),
4758 "%s (class file version %u.%u) was compiled with an invalid major version",
4759 class_name->as_C_string(), major, minor);
4760 return;
4761 }
4762
4763 if (major > max_version) {
4764 Exceptions::fthrow(
4765 THREAD_AND_LOCATION,
4766 vmSymbols::java_lang_UnsupportedClassVersionError(),
4767 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4768 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4769 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4770 return;
4771 }
4772
4773 if (major < JAVA_12_VERSION || minor == 0) {
4774 return;
4775 }
4776
4777 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4778 if (major != max_version) {
4779 Exceptions::fthrow(
4780 THREAD_AND_LOCATION,
4781 vmSymbols::java_lang_UnsupportedClassVersionError(),
4782 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4783 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4784 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4785 return;
4786 }
4787
4788 if (!Arguments::enable_preview()) {
4789 Exceptions::fthrow(
4790 THREAD_AND_LOCATION,
4791 vmSymbols::java_lang_UnsupportedClassVersionError(),
4792 "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4793 class_name->as_C_string(), major, minor);
4794 return;
4795 }
4796
4797 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4798 Exceptions::fthrow(
4799 THREAD_AND_LOCATION,
4800 vmSymbols::java_lang_UnsupportedClassVersionError(),
4801 "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4802 class_name->as_C_string(), major, minor);
4803 }
4804 }
4805
4806 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4807 bool is_interface,
4808 TRAPS) const {
4809 if (!_need_verify) { return; }
4810
4811 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4812 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4813 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4814 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4815 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4816 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4817 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4818 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4819 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4820
4821 bool is_illegal = false;
4822
4823 if (is_interface) {
4824 if (!is_public || !is_static || !is_final || is_private ||
4825 is_protected || is_volatile || is_transient ||
4826 (major_gte_15 && is_enum)) {
4827 is_illegal = true;
4828 }
4829 } else { // not interface
4830 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4831 is_illegal = true;
4832 }
4833 }
4834
4835 if (is_illegal) {
4836 ResourceMark rm(THREAD);
4837 Exceptions::fthrow(
4838 THREAD_AND_LOCATION,
4839 vmSymbols::java_lang_ClassFormatError(),
4840 "Illegal field modifiers in class %s: 0x%X",
4841 _class_name->as_C_string(), flags);
4842 return;
4843 }
4844 }
4845
4846 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4847 bool is_interface,
4848 const Symbol* name,
4849 TRAPS) const {
4850 if (!_need_verify) { return; }
4851
4852 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4853 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4854 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4855 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4856 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4857 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4858 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4859 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4860 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4861 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4862 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4863 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4864 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4865
4866 bool is_illegal = false;
4867
4868 if (is_interface) {
4869 if (major_gte_8) {
4870 // Class file version is JAVA_8_VERSION or later Methods of
4871 // interfaces may set any of the flags except ACC_PROTECTED,
4872 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4873 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4874 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4875 (is_native || is_protected || is_final || is_synchronized) ||
4876 // If a specific method of a class or interface has its
4877 // ACC_ABSTRACT flag set, it must not have any of its
4878 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4879 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4880 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4881 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4882 (is_abstract && (is_private || is_static || is_strict))) {
4883 is_illegal = true;
4884 }
4885 } else if (major_gte_15) {
4886 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4887 if (!is_public || is_private || is_protected || is_static || is_final ||
4888 is_synchronized || is_native || !is_abstract || is_strict) {
4889 is_illegal = true;
4890 }
4891 } else {
4892 // Class file version is pre-JAVA_1_5_VERSION
4893 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4894 is_illegal = true;
4895 }
4896 }
4897 } else { // not interface
4898 if (has_illegal_visibility(flags)) {
4899 is_illegal = true;
4900 } else {
4901 if (is_initializer) {
4902 if (is_static || is_final || is_synchronized || is_native ||
4903 is_abstract || (major_gte_15 && is_bridge)) {
4904 is_illegal = true;
4905 }
4906 } else { // not initializer
4907 if (is_abstract) {
4908 if ((is_final || is_native || is_private || is_static ||
4909 (major_gte_15 && (is_synchronized || is_strict)))) {
4910 is_illegal = true;
4911 }
4912 }
4913 }
4914 }
4915 }
4916
4917 if (is_illegal) {
4918 ResourceMark rm(THREAD);
4919 Exceptions::fthrow(
4920 THREAD_AND_LOCATION,
4921 vmSymbols::java_lang_ClassFormatError(),
4922 "Method %s in class %s has illegal modifiers: 0x%X",
4923 name->as_C_string(), _class_name->as_C_string(), flags);
4924 return;
4925 }
4926 }
4927
4928 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4929 int length,
4930 TRAPS) const {
4931 assert(_need_verify, "only called when _need_verify is true");
4932 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4933 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4934 }
4935 }
4936
4937 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4938 // In class names, '/' separates unqualified names. This is verified in this function also.
4939 // Method names also may not contain the characters '<' or '>', unless <init>
4940 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4941 // method. Because these names have been checked as special cases before
4942 // calling this method in verify_legal_method_name.
4943 //
4944 // This method is also called from the modular system APIs in modules.cpp
4945 // to verify the validity of module and package names.
4946 bool ClassFileParser::verify_unqualified_name(const char* name,
4947 unsigned int length,
4948 int type) {
4949 if (length == 0) return false; // Must have at least one char.
4950 for (const char* p = name; p != name + length; p++) {
4951 switch(*p) {
4952 case JVM_SIGNATURE_DOT:
4953 case JVM_SIGNATURE_ENDCLASS:
4954 case JVM_SIGNATURE_ARRAY:
4955 // do not permit '.', ';', or '['
4956 return false;
4957 case JVM_SIGNATURE_SLASH:
4958 // check for '//' or leading or trailing '/' which are not legal
4959 // unqualified name must not be empty
4960 if (type == ClassFileParser::LegalClass) {
4961 if (p == name || p+1 >= name+length ||
4962 *(p+1) == JVM_SIGNATURE_SLASH) {
4963 return false;
4964 }
4965 } else {
4966 return false; // do not permit '/' unless it's class name
4967 }
4968 break;
4969 case JVM_SIGNATURE_SPECIAL:
4970 case JVM_SIGNATURE_ENDSPECIAL:
4971 // do not permit '<' or '>' in method names
4972 if (type == ClassFileParser::LegalMethod) {
4973 return false;
4974 }
4975 }
4976 }
4977 return true;
4978 }
4979
4980 // Take pointer to a UTF8 byte string (not NUL-terminated).
4981 // Skip over the longest part of the string that could
4982 // be taken as a fieldname. Allow '/' if slash_ok is true.
4983 // Return a pointer to just past the fieldname.
4984 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4985 // being true, we saw consecutive slashes (meaning we were looking for a
4986 // qualified path but found something that was badly-formed).
4987 static const char* skip_over_field_name(const char* const name,
4988 bool slash_ok,
4989 unsigned int length) {
4990 const char* p;
4991 jboolean last_is_slash = false;
4992 jboolean not_first_ch = false;
4993
4994 for (p = name; p != name + length; not_first_ch = true) {
4995 const char* old_p = p;
4996 jchar ch = *p;
4997 if (ch < 128) {
4998 p++;
4999 // quick check for ascii
5000 if ((ch >= 'a' && ch <= 'z') ||
5001 (ch >= 'A' && ch <= 'Z') ||
5002 (ch == '_' || ch == '$') ||
5003 (not_first_ch && ch >= '0' && ch <= '9')) {
5004 last_is_slash = false;
5005 continue;
5006 }
5007 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
5008 if (last_is_slash) {
5009 return NULL; // Don't permit consecutive slashes
5010 }
5011 last_is_slash = true;
5012 continue;
5013 }
5014 }
5015 else {
5016 jint unicode_ch;
5017 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5018 p = tmp_p;
5019 last_is_slash = false;
5020 // Check if ch is Java identifier start or is Java identifier part
5021 // 4672820: call java.lang.Character methods directly without generating separate tables.
5022 EXCEPTION_MARK;
5023 // return value
5024 JavaValue result(T_BOOLEAN);
5025 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5026 JavaCallArguments args;
5027 args.push_int(unicode_ch);
5028
5029 if (not_first_ch) {
5030 // public static boolean isJavaIdentifierPart(char ch);
5031 JavaCalls::call_static(&result,
5032 SystemDictionary::Character_klass(),
5033 vmSymbols::isJavaIdentifierPart_name(),
5034 vmSymbols::int_bool_signature(),
5035 &args,
5036 THREAD);
5037 } else {
5038 // public static boolean isJavaIdentifierStart(char ch);
5039 JavaCalls::call_static(&result,
5040 SystemDictionary::Character_klass(),
5041 vmSymbols::isJavaIdentifierStart_name(),
5042 vmSymbols::int_bool_signature(),
5043 &args,
5044 THREAD);
5045 }
5046 if (HAS_PENDING_EXCEPTION) {
5047 CLEAR_PENDING_EXCEPTION;
5048 return NULL;
5049 }
5050 if(result.get_jboolean()) {
5051 continue;
5052 }
5053 }
5054 return (not_first_ch) ? old_p : NULL;
5055 }
5056 return (not_first_ch) ? p : NULL;
5057 }
5058
5059 // Take pointer to a UTF8 byte string (not NUL-terminated).
5060 // Skip over the longest part of the string that could
5061 // be taken as a field signature. Allow "void" if void_ok.
5062 // Return a pointer to just past the signature.
5063 // Return NULL if no legal signature is found.
5064 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5065 bool void_ok,
5066 unsigned int length,
5067 TRAPS) const {
5068 unsigned int array_dim = 0;
5069 while (length > 0) {
5070 switch (signature[0]) {
5071 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5072 case JVM_SIGNATURE_BOOLEAN:
5073 case JVM_SIGNATURE_BYTE:
5074 case JVM_SIGNATURE_CHAR:
5075 case JVM_SIGNATURE_SHORT:
5076 case JVM_SIGNATURE_INT:
5077 case JVM_SIGNATURE_FLOAT:
5078 case JVM_SIGNATURE_LONG:
5079 case JVM_SIGNATURE_DOUBLE:
5080 return signature + 1;
5081 case JVM_SIGNATURE_CLASS: {
5082 if (_major_version < JAVA_1_5_VERSION) {
5083 // Skip over the class name if one is there
5084 const char* const p = skip_over_field_name(signature + 1, true, --length);
5085
5086 // The next character better be a semicolon
5087 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
5088 return p + 1;
5089 }
5090 }
5091 else {
5092 // Skip leading 'L' and ignore first appearance of ';'
5093 signature++;
5094 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
5095 // Format check signature
5096 if (c != NULL) {
5097 int newlen = c - (char*) signature;
5098 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5099 if (!legal) {
5100 classfile_parse_error("Class name is empty or contains illegal character "
5101 "in descriptor in class file %s",
5102 CHECK_0);
5103 return NULL;
5104 }
5105 return signature + newlen + 1;
5106 }
5107 }
5108 return NULL;
5109 }
5110 case JVM_SIGNATURE_ARRAY:
5111 array_dim++;
5112 if (array_dim > 255) {
5113 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5114 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5115 }
5116 // The rest of what's there better be a legal signature
5117 signature++;
5118 length--;
5119 void_ok = false;
5120 break;
5121 default:
5122 return NULL;
5123 }
5124 }
5125 return NULL;
5126 }
5127
5128 // Checks if name is a legal class name.
5129 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5130 if (!_need_verify || _relax_verify) { return; }
5131
5132 assert(name->refcount() > 0, "symbol must be kept alive");
5133 char* bytes = (char*)name->bytes();
5134 unsigned int length = name->utf8_length();
5135 bool legal = false;
5136
5137 if (length > 0) {
5138 const char* p;
5139 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5140 p = skip_over_field_signature(bytes, false, length, CHECK);
5141 legal = (p != NULL) && ((p - bytes) == (int)length);
5142 } else if (_major_version < JAVA_1_5_VERSION) {
5143 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5144 p = skip_over_field_name(bytes, true, length);
5145 legal = (p != NULL) && ((p - bytes) == (int)length);
5146 }
5147 } else {
5148 // 4900761: relax the constraints based on JSR202 spec
5149 // Class names may be drawn from the entire Unicode character set.
5150 // Identifiers between '/' must be unqualified names.
5151 // The utf8 string has been verified when parsing cpool entries.
5152 legal = verify_unqualified_name(bytes, length, LegalClass);
5153 }
5154 }
5155 if (!legal) {
5156 ResourceMark rm(THREAD);
5157 assert(_class_name != NULL, "invariant");
5158 Exceptions::fthrow(
5159 THREAD_AND_LOCATION,
5160 vmSymbols::java_lang_ClassFormatError(),
5161 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5162 _class_name->as_C_string()
5163 );
5164 return;
5165 }
5166 }
5167
5168 // Checks if name is a legal field name.
5169 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5170 if (!_need_verify || _relax_verify) { return; }
5171
5172 char* bytes = (char*)name->bytes();
5173 unsigned int length = name->utf8_length();
5174 bool legal = false;
5175
5176 if (length > 0) {
5177 if (_major_version < JAVA_1_5_VERSION) {
5178 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5179 const char* p = skip_over_field_name(bytes, false, length);
5180 legal = (p != NULL) && ((p - bytes) == (int)length);
5181 }
5182 } else {
5183 // 4881221: relax the constraints based on JSR202 spec
5184 legal = verify_unqualified_name(bytes, length, LegalField);
5185 }
5186 }
5187
5188 if (!legal) {
5189 ResourceMark rm(THREAD);
5190 assert(_class_name != NULL, "invariant");
5191 Exceptions::fthrow(
5192 THREAD_AND_LOCATION,
5193 vmSymbols::java_lang_ClassFormatError(),
5194 "Illegal field name \"%.*s\" in class %s", length, bytes,
5195 _class_name->as_C_string()
5196 );
5197 return;
5198 }
5199 }
5200
5201 // Checks if name is a legal method name.
5202 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5203 if (!_need_verify || _relax_verify) { return; }
5204
5205 assert(name != NULL, "method name is null");
5206 char* bytes = (char*)name->bytes();
5207 unsigned int length = name->utf8_length();
5208 bool legal = false;
5209
5210 if (length > 0) {
5211 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
5212 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5213 legal = true;
5214 }
5215 } else if (_major_version < JAVA_1_5_VERSION) {
5216 const char* p;
5217 p = skip_over_field_name(bytes, false, length);
5218 legal = (p != NULL) && ((p - bytes) == (int)length);
5219 } else {
5220 // 4881221: relax the constraints based on JSR202 spec
5221 legal = verify_unqualified_name(bytes, length, LegalMethod);
5222 }
5223 }
5224
5225 if (!legal) {
5226 ResourceMark rm(THREAD);
5227 assert(_class_name != NULL, "invariant");
5228 Exceptions::fthrow(
5229 THREAD_AND_LOCATION,
5230 vmSymbols::java_lang_ClassFormatError(),
5231 "Illegal method name \"%.*s\" in class %s", length, bytes,
5232 _class_name->as_C_string()
5233 );
5234 return;
5235 }
5236 }
5237
5238
5239 // Checks if signature is a legal field signature.
5240 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5241 const Symbol* signature,
5242 TRAPS) const {
5243 if (!_need_verify) { return; }
5244
5245 const char* const bytes = (const char* const)signature->bytes();
5246 const unsigned int length = signature->utf8_length();
5247 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5248
5249 if (p == NULL || (p - bytes) != (int)length) {
5250 throwIllegalSignature("Field", name, signature, CHECK);
5251 }
5252 }
5253
5254 // Checks if signature is a legal method signature.
5255 // Returns number of parameters
5256 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5257 const Symbol* signature,
5258 TRAPS) const {
5259 if (!_need_verify) {
5260 // make sure caller's args_size will be less than 0 even for non-static
5261 // method so it will be recomputed in compute_size_of_parameters().
5262 return -2;
5263 }
5264
5265 // Class initializers cannot have args for class format version >= 51.
5266 if (name == vmSymbols::class_initializer_name() &&
5267 signature != vmSymbols::void_method_signature() &&
5268 _major_version >= JAVA_7_VERSION) {
5269 throwIllegalSignature("Method", name, signature, CHECK_0);
5270 return 0;
5271 }
5272
5273 unsigned int args_size = 0;
5274 const char* p = (const char*)signature->bytes();
5275 unsigned int length = signature->utf8_length();
5276 const char* nextp;
5277
5278 // The first character must be a '('
5279 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5280 length--;
5281 // Skip over legal field signatures
5282 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5283 while ((length > 0) && (nextp != NULL)) {
5284 args_size++;
5285 if (p[0] == 'J' || p[0] == 'D') {
5286 args_size++;
5287 }
5288 length -= nextp - p;
5289 p = nextp;
5290 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5291 }
5292 // The first non-signature thing better be a ')'
5293 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5294 length--;
5295 if (name->utf8_length() > 0 && name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
5296 // All internal methods must return void
5297 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5298 return args_size;
5299 }
5300 } else {
5301 // Now we better just have a return value
5302 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5303 if (nextp && ((int)length == (nextp - p))) {
5304 return args_size;
5305 }
5306 }
5307 }
5308 }
5309 // Report error
5310 throwIllegalSignature("Method", name, signature, CHECK_0);
5311 return 0;
5312 }
5313
5314 int ClassFileParser::static_field_size() const {
5315 assert(_field_info != NULL, "invariant");
5316 return _field_info->static_field_size;
5317 }
5318
5319 int ClassFileParser::total_oop_map_count() const {
5320 assert(_field_info != NULL, "invariant");
5321 return _field_info->total_oop_map_count;
5322 }
5323
5324 jint ClassFileParser::layout_size() const {
5325 assert(_field_info != NULL, "invariant");
5326 return _field_info->instance_size;
5327 }
5328
5329 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5330 const Array<Method*>* methods) {
5331 assert(ik != NULL, "invariant");
5332 assert(methods != NULL, "invariant");
5333
5334 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5335 // (We used to do this lazily, but now we query it in Rewriter,
5336 // which is eagerly done for every method, so we might as well do it now,
5337 // when everything is fresh in memory.)
5338 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5339
5340 if (klass_id != vmSymbols::NO_SID) {
5341 for (int j = 0; j < methods->length(); ++j) {
5342 Method* method = methods->at(j);
5343 method->init_intrinsic_id();
5344
5345 if (CheckIntrinsics) {
5346 // Check if an intrinsic is defined for method 'method',
5347 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5348 if (method->intrinsic_id() != vmIntrinsics::_none &&
5349 !method->intrinsic_candidate()) {
5350 tty->print("Compiler intrinsic is defined for method [%s], "
5351 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5352 method->name_and_sig_as_C_string(),
5353 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5354 );
5355 tty->cr();
5356 DEBUG_ONLY(vm_exit(1));
5357 }
5358 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5359 // but there is no intrinsic available for it.
5360 if (method->intrinsic_candidate() &&
5361 method->intrinsic_id() == vmIntrinsics::_none) {
5362 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5363 "but no compiler intrinsic is defined for the method.%s",
5364 method->name_and_sig_as_C_string(),
5365 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5366 );
5367 tty->cr();
5368 DEBUG_ONLY(vm_exit(1));
5369 }
5370 }
5371 } // end for
5372
5373 #ifdef ASSERT
5374 if (CheckIntrinsics) {
5375 // Check for orphan methods in the current class. A method m
5376 // of a class C is orphan if an intrinsic is defined for method m,
5377 // but class C does not declare m.
5378 // The check is potentially expensive, therefore it is available
5379 // only in debug builds.
5380
5381 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5382 if (vmIntrinsics::_compiledLambdaForm == id) {
5383 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5384 // generated for the JVM from a LambdaForm and therefore no method
5385 // is defined for it.
5386 continue;
5387 }
5388
5389 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5390 // Check if the current class contains a method with the same
5391 // name, flags, signature.
5392 bool match = false;
5393 for (int j = 0; j < methods->length(); ++j) {
5394 const Method* method = methods->at(j);
5395 if (method->intrinsic_id() == id) {
5396 match = true;
5397 break;
5398 }
5399 }
5400
5401 if (!match) {
5402 char buf[1000];
5403 tty->print("Compiler intrinsic is defined for method [%s], "
5404 "but the method is not available in class [%s].%s",
5405 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5406 buf, sizeof(buf)),
5407 ik->name()->as_C_string(),
5408 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5409 );
5410 tty->cr();
5411 DEBUG_ONLY(vm_exit(1));
5412 }
5413 }
5414 } // end for
5415 } // CheckIntrinsics
5416 #endif // ASSERT
5417 }
5418 }
5419
5420 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5421 if (_klass != NULL) {
5422 return _klass;
5423 }
5424
5425 InstanceKlass* const ik =
5426 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5427
5428 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5429
5430 assert(_klass == ik, "invariant");
5431
5432
5433 if (ik->should_store_fingerprint()) {
5434 ik->store_fingerprint(_stream->compute_fingerprint());
5435 }
5436
5437 ik->set_has_passed_fingerprint_check(false);
5438 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5439 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5440 uint64_t fp = ik->has_stored_fingerprint() ? ik->get_stored_fingerprint() : _stream->compute_fingerprint();
5441 if (aot_fp != 0 && aot_fp == fp) {
5442 // This class matches with a class saved in an AOT library
5443 ik->set_has_passed_fingerprint_check(true);
5444 } else {
5445 ResourceMark rm;
5446 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5447 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5448 }
5449 }
5450
5451 return ik;
5452 }
5453
5454 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5455 assert(ik != NULL, "invariant");
5456
5457 // Set name and CLD before adding to CLD
5458 ik->set_class_loader_data(_loader_data);
5459 ik->set_name(_class_name);
5460
5461 // Add all classes to our internal class loader list here,
5462 // including classes in the bootstrap (NULL) class loader.
5463 const bool publicize = !is_internal();
5464
5465 _loader_data->add_class(ik, publicize);
5466
5467 set_klass_to_deallocate(ik);
5468
5469 assert(_field_info != NULL, "invariant");
5470 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5471 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5472 "sanity");
5473
5474 assert(ik->is_instance_klass(), "sanity");
5475 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5476
5477 // Fill in information already parsed
5478 ik->set_should_verify_class(_need_verify);
5479
5480 // Not yet: supers are done below to support the new subtype-checking fields
5481 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5482 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5483 assert(_fac != NULL, "invariant");
5484 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5485
5486 // this transfers ownership of a lot of arrays from
5487 // the parser onto the InstanceKlass*
5488 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5489
5490 // note that is not safe to use the fields in the parser from this point on
5491 assert(NULL == _cp, "invariant");
5492 assert(NULL == _fields, "invariant");
5493 assert(NULL == _methods, "invariant");
5494 assert(NULL == _inner_classes, "invariant");
5495 assert(NULL == _nest_members, "invariant");
5496 assert(NULL == _local_interfaces, "invariant");
5497 assert(NULL == _combined_annotations, "invariant");
5498
5499 if (_has_final_method) {
5500 ik->set_has_final_method();
5501 }
5502
5503 ik->copy_method_ordering(_method_ordering, CHECK);
5504 // The InstanceKlass::_methods_jmethod_ids cache
5505 // is managed on the assumption that the initial cache
5506 // size is equal to the number of methods in the class. If
5507 // that changes, then InstanceKlass::idnum_can_increment()
5508 // has to be changed accordingly.
5509 ik->set_initial_method_idnum(ik->methods()->length());
5510
5511 ik->set_this_class_index(_this_class_index);
5512
5513 if (is_unsafe_anonymous()) {
5514 // _this_class_index is a CONSTANT_Class entry that refers to this
5515 // anonymous class itself. If this class needs to refer to its own methods or
5516 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5517 // _this_class_index. However, because this class is anonymous (it's
5518 // not stored in SystemDictionary), _this_class_index cannot be resolved
5519 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5520 // Therefore, we must eagerly resolve _this_class_index now.
5521 ik->constants()->klass_at_put(_this_class_index, ik);
5522 }
5523
5524 ik->set_minor_version(_minor_version);
5525 ik->set_major_version(_major_version);
5526 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5527 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5528
5529 if (_unsafe_anonymous_host != NULL) {
5530 assert (ik->is_unsafe_anonymous(), "should be the same");
5531 ik->set_unsafe_anonymous_host(_unsafe_anonymous_host);
5532 }
5533
5534 // Set PackageEntry for this_klass
5535 oop cl = ik->class_loader();
5536 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5537 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5538 ik->set_package(cld, CHECK);
5539
5540 const Array<Method*>* const methods = ik->methods();
5541 assert(methods != NULL, "invariant");
5542 const int methods_len = methods->length();
5543
5544 check_methods_for_intrinsics(ik, methods);
5545
5546 // Fill in field values obtained by parse_classfile_attributes
5547 if (_parsed_annotations->has_any_annotations()) {
5548 _parsed_annotations->apply_to(ik);
5549 }
5550
5551 apply_parsed_class_attributes(ik);
5552
5553 // Miranda methods
5554 if ((_num_miranda_methods > 0) ||
5555 // if this class introduced new miranda methods or
5556 (_super_klass != NULL && _super_klass->has_miranda_methods())
5557 // super class exists and this class inherited miranda methods
5558 ) {
5559 ik->set_has_miranda_methods(); // then set a flag
5560 }
5561
5562 // Fill in information needed to compute superclasses.
5563 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5564 ik->set_transitive_interfaces(_transitive_interfaces);
5565 _transitive_interfaces = NULL;
5566
5567 // Initialize itable offset tables
5568 klassItable::setup_itable_offset_table(ik);
5569
5570 // Compute transitive closure of interfaces this class implements
5571 // Do final class setup
5572 fill_oop_maps(ik,
5573 _field_info->nonstatic_oop_map_count,
5574 _field_info->nonstatic_oop_offsets,
5575 _field_info->nonstatic_oop_counts);
5576
5577 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5578 set_precomputed_flags(ik);
5579
5580 // check if this class can access its super class
5581 check_super_class_access(ik, CHECK);
5582
5583 // check if this class can access its superinterfaces
5584 check_super_interface_access(ik, CHECK);
5585
5586 // check if this class overrides any final method
5587 check_final_method_override(ik, CHECK);
5588
5589 // reject static interface methods prior to Java 8
5590 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5591 check_illegal_static_method(ik, CHECK);
5592 }
5593
5594 // Obtain this_klass' module entry
5595 ModuleEntry* module_entry = ik->module();
5596 assert(module_entry != NULL, "module_entry should always be set");
5597
5598 // Obtain java.lang.Module
5599 Handle module_handle(THREAD, module_entry->module());
5600
5601 // Allocate mirror and initialize static fields
5602 // The create_mirror() call will also call compute_modifiers()
5603 java_lang_Class::create_mirror(ik,
5604 Handle(THREAD, _loader_data->class_loader()),
5605 module_handle,
5606 _protection_domain,
5607 CHECK);
5608
5609 assert(_all_mirandas != NULL, "invariant");
5610
5611 // Generate any default methods - default methods are public interface methods
5612 // that have a default implementation. This is new with Java 8.
5613 if (_has_nonstatic_concrete_methods) {
5614 DefaultMethods::generate_default_methods(ik,
5615 _all_mirandas,
5616 CHECK);
5617 }
5618
5619 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5620 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5621 !module_entry->has_default_read_edges()) {
5622 if (!module_entry->set_has_default_read_edges()) {
5623 // We won a potential race
5624 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5625 }
5626 }
5627
5628 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5629
5630 if (!is_internal()) {
5631 if (log_is_enabled(Info, class, load)) {
5632 ResourceMark rm;
5633 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5634 ik->print_class_load_logging(_loader_data, module_name, _stream);
5635 }
5636
5637 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5638 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5639 log_is_enabled(Info, class, preview)) {
5640 ResourceMark rm;
5641 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5642 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5643 }
5644
5645 if (log_is_enabled(Debug, class, resolve)) {
5646 ResourceMark rm;
5647 // print out the superclass.
5648 const char * from = ik->external_name();
5649 if (ik->java_super() != NULL) {
5650 log_debug(class, resolve)("%s %s (super)",
5651 from,
5652 ik->java_super()->external_name());
5653 }
5654 // print out each of the interface classes referred to by this class.
5655 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5656 if (local_interfaces != NULL) {
5657 const int length = local_interfaces->length();
5658 for (int i = 0; i < length; i++) {
5659 const InstanceKlass* const k = local_interfaces->at(i);
5660 const char * to = k->external_name();
5661 log_debug(class, resolve)("%s %s (interface)", from, to);
5662 }
5663 }
5664 }
5665 }
5666
5667 JFR_ONLY(INIT_ID(ik);)
5668
5669 // If we reach here, all is well.
5670 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5671 // in order for it to not be destroyed in the ClassFileParser destructor.
5672 set_klass_to_deallocate(NULL);
5673
5674 // it's official
5675 set_klass(ik);
5676
5677 debug_only(ik->verify();)
5678 }
5679
5680 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5681 // Decrement the refcount in the old name, since we're clobbering it.
5682 _class_name->decrement_refcount();
5683
5684 _class_name = new_class_name;
5685 // Increment the refcount of the new name.
5686 // Now the ClassFileParser owns this name and will decrement in
5687 // the destructor.
5688 _class_name->increment_refcount();
5689 }
5690
5691
5692 // For an unsafe anonymous class that is in the unnamed package, move it to its host class's
5693 // package by prepending its host class's package name to its class name and setting
5694 // its _class_name field.
5695 void ClassFileParser::prepend_host_package_name(const InstanceKlass* unsafe_anonymous_host, TRAPS) {
5696 ResourceMark rm(THREAD);
5697 assert(strrchr(_class_name->as_C_string(), JVM_SIGNATURE_SLASH) == NULL,
5698 "Unsafe anonymous class should not be in a package");
5699 const char* host_pkg_name =
5700 ClassLoader::package_from_name(unsafe_anonymous_host->name()->as_C_string(), NULL);
5701
5702 if (host_pkg_name != NULL) {
5703 int host_pkg_len = (int)strlen(host_pkg_name);
5704 int class_name_len = _class_name->utf8_length();
5705 int symbol_len = host_pkg_len + 1 + class_name_len;
5706 char* new_anon_name = NEW_RESOURCE_ARRAY(char, symbol_len + 1);
5707 int n = os::snprintf(new_anon_name, symbol_len + 1, "%s/%.*s",
5708 host_pkg_name, class_name_len, _class_name->base());
5709 assert(n == symbol_len, "Unexpected number of characters in string");
5710
5711 // Decrement old _class_name to avoid leaking.
5712 _class_name->decrement_refcount();
5713
5714 // Create a symbol and update the anonymous class name.
5715 // The new class name is created with a refcount of one. When installed into the InstanceKlass,
5716 // it'll be two and when the ClassFileParser destructor runs, it'll go back to one and get deleted
5717 // when the class is unloaded.
5718 _class_name = SymbolTable::new_symbol(new_anon_name, symbol_len);
5719 }
5720 }
5721
5722 // If the host class and the anonymous class are in the same package then do
5723 // nothing. If the anonymous class is in the unnamed package then move it to its
5724 // host's package. If the classes are in different packages then throw an IAE
5725 // exception.
5726 void ClassFileParser::fix_unsafe_anonymous_class_name(TRAPS) {
5727 assert(_unsafe_anonymous_host != NULL, "Expected an unsafe anonymous class");
5728
5729 const jbyte* anon_last_slash = UTF8::strrchr((const jbyte*)_class_name->base(),
5730 _class_name->utf8_length(), JVM_SIGNATURE_SLASH);
5731 if (anon_last_slash == NULL) { // Unnamed package
5732 prepend_host_package_name(_unsafe_anonymous_host, CHECK);
5733 } else {
5734 if (!_unsafe_anonymous_host->is_same_class_package(_unsafe_anonymous_host->class_loader(), _class_name)) {
5735 ResourceMark rm(THREAD);
5736 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5737 err_msg("Host class %s and anonymous class %s are in different packages",
5738 _unsafe_anonymous_host->name()->as_C_string(), _class_name->as_C_string()));
5739 }
5740 }
5741 }
5742
5743 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5744 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5745 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5746 bool need_verify =
5747 // verifyAll
5748 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5749 // verifyRemote
5750 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5751 return !need_verify;
5752 }
5753
5754 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5755 Symbol* name,
5756 ClassLoaderData* loader_data,
5757 Handle protection_domain,
5758 const InstanceKlass* unsafe_anonymous_host,
5759 GrowableArray<Handle>* cp_patches,
5760 Publicity pub_level,
5761 TRAPS) :
5762 _stream(stream),
5763 _requested_name(name),
5764 _class_name(NULL),
5765 _loader_data(loader_data),
5766 _unsafe_anonymous_host(unsafe_anonymous_host),
5767 _cp_patches(cp_patches),
5768 _num_patched_klasses(0),
5769 _max_num_patched_klasses(0),
5770 _orig_cp_size(0),
5771 _first_patched_klass_resolved_index(0),
5772 _super_klass(),
5773 _cp(NULL),
5774 _fields(NULL),
5775 _methods(NULL),
5776 _inner_classes(NULL),
5777 _nest_members(NULL),
5778 _nest_host(0),
5779 _local_interfaces(NULL),
5780 _transitive_interfaces(NULL),
5781 _combined_annotations(NULL),
5782 _class_annotations(NULL),
5783 _class_type_annotations(NULL),
5784 _fields_annotations(NULL),
5785 _fields_type_annotations(NULL),
5786 _klass(NULL),
5787 _klass_to_deallocate(NULL),
5788 _parsed_annotations(NULL),
5789 _fac(NULL),
5790 _field_info(NULL),
5791 _method_ordering(NULL),
5792 _all_mirandas(NULL),
5793 _vtable_size(0),
5794 _itable_size(0),
5795 _num_miranda_methods(0),
5796 _rt(REF_NONE),
5797 _protection_domain(protection_domain),
5798 _access_flags(),
5799 _pub_level(pub_level),
5800 _bad_constant_seen(0),
5801 _synthetic_flag(false),
5802 _sde_length(false),
5803 _sde_buffer(NULL),
5804 _sourcefile_index(0),
5805 _generic_signature_index(0),
5806 _major_version(0),
5807 _minor_version(0),
5808 _this_class_index(0),
5809 _super_class_index(0),
5810 _itfs_len(0),
5811 _java_fields_count(0),
5812 _need_verify(false),
5813 _relax_verify(false),
5814 _has_nonstatic_concrete_methods(false),
5815 _declares_nonstatic_concrete_methods(false),
5816 _has_final_method(false),
5817 _has_finalizer(false),
5818 _has_empty_finalizer(false),
5819 _has_vanilla_constructor(false),
5820 _max_bootstrap_specifier_index(-1) {
5821
5822 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5823 _class_name->increment_refcount();
5824
5825 assert(THREAD->is_Java_thread(), "invariant");
5826 assert(_loader_data != NULL, "invariant");
5827 assert(stream != NULL, "invariant");
5828 assert(_stream != NULL, "invariant");
5829 assert(_stream->buffer() == _stream->current(), "invariant");
5830 assert(_class_name != NULL, "invariant");
5831 assert(0 == _access_flags.as_int(), "invariant");
5832
5833 // Figure out whether we can skip format checking (matching classic VM behavior)
5834 if (DumpSharedSpaces) {
5835 // verify == true means it's a 'remote' class (i.e., non-boot class)
5836 // Verification decision is based on BytecodeVerificationRemote flag
5837 // for those classes.
5838 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5839 BytecodeVerificationLocal;
5840 }
5841 else {
5842 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5843 stream->need_verify());
5844 }
5845 if (_cp_patches != NULL) {
5846 int len = _cp_patches->length();
5847 for (int i=0; i<len; i++) {
5848 if (has_cp_patch_at(i)) {
5849 Handle patch = cp_patch_at(i);
5850 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5851 // We need to append the names of the patched classes to the end of the constant pool,
5852 // because a patched class may have a Utf8 name that's not already included in the
5853 // original constant pool. These class names are used when patch_constant_pool()
5854 // calls patch_class().
5855 //
5856 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5857 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5858 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5859 _max_num_patched_klasses++;
5860 }
5861 }
5862 }
5863 }
5864
5865 // synch back verification state to stream
5866 stream->set_verify(_need_verify);
5867
5868 // Check if verification needs to be relaxed for this class file
5869 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5870 _relax_verify = relax_format_check_for(_loader_data);
5871
5872 parse_stream(stream, CHECK);
5873
5874 post_process_parsed_stream(stream, _cp, CHECK);
5875 }
5876
5877 void ClassFileParser::clear_class_metadata() {
5878 // metadata created before the instance klass is created. Must be
5879 // deallocated if classfile parsing returns an error.
5880 _cp = NULL;
5881 _fields = NULL;
5882 _methods = NULL;
5883 _inner_classes = NULL;
5884 _nest_members = NULL;
5885 _local_interfaces = NULL;
5886 _combined_annotations = NULL;
5887 _class_annotations = _class_type_annotations = NULL;
5888 _fields_annotations = _fields_type_annotations = NULL;
5889 }
5890
5891 // Destructor to clean up
5892 ClassFileParser::~ClassFileParser() {
5893 _class_name->decrement_refcount();
5894
5895 if (_cp != NULL) {
5896 MetadataFactory::free_metadata(_loader_data, _cp);
5897 }
5898 if (_fields != NULL) {
5899 MetadataFactory::free_array<u2>(_loader_data, _fields);
5900 }
5901
5902 if (_methods != NULL) {
5903 // Free methods
5904 InstanceKlass::deallocate_methods(_loader_data, _methods);
5905 }
5906
5907 // beware of the Universe::empty_blah_array!!
5908 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5909 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5910 }
5911
5912 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
5913 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5914 }
5915
5916 // Free interfaces
5917 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5918 _local_interfaces, _transitive_interfaces);
5919
5920 if (_combined_annotations != NULL) {
5921 // After all annotations arrays have been created, they are installed into the
5922 // Annotations object that will be assigned to the InstanceKlass being created.
5923
5924 // Deallocate the Annotations object and the installed annotations arrays.
5925 _combined_annotations->deallocate_contents(_loader_data);
5926
5927 // If the _combined_annotations pointer is non-NULL,
5928 // then the other annotations fields should have been cleared.
5929 assert(_class_annotations == NULL, "Should have been cleared");
5930 assert(_class_type_annotations == NULL, "Should have been cleared");
5931 assert(_fields_annotations == NULL, "Should have been cleared");
5932 assert(_fields_type_annotations == NULL, "Should have been cleared");
5933 } else {
5934 // If the annotations arrays were not installed into the Annotations object,
5935 // then they have to be deallocated explicitly.
5936 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
5937 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
5938 Annotations::free_contents(_loader_data, _fields_annotations);
5939 Annotations::free_contents(_loader_data, _fields_type_annotations);
5940 }
5941
5942 clear_class_metadata();
5943 _transitive_interfaces = NULL;
5944
5945 // deallocate the klass if already created. Don't directly deallocate, but add
5946 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5947 // at a safepoint.
5948 if (_klass_to_deallocate != NULL) {
5949 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5950 }
5951 }
5952
5953 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5954 TRAPS) {
5955
5956 assert(stream != NULL, "invariant");
5957 assert(_class_name != NULL, "invariant");
5958
5959 // BEGIN STREAM PARSING
5960 stream->guarantee_more(8, CHECK); // magic, major, minor
5961 // Magic value
5962 const u4 magic = stream->get_u4_fast();
5963 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5964 "Incompatible magic value %u in class file %s",
5965 magic, CHECK);
5966
5967 // Version numbers
5968 _minor_version = stream->get_u2_fast();
5969 _major_version = stream->get_u2_fast();
5970
5971 if (DumpSharedSpaces && _major_version < JAVA_6_VERSION) {
5972 ResourceMark rm;
5973 warning("Pre JDK 6 class not supported by CDS: %u.%u %s",
5974 _major_version, _minor_version, _class_name->as_C_string());
5975 Exceptions::fthrow(
5976 THREAD_AND_LOCATION,
5977 vmSymbols::java_lang_UnsupportedClassVersionError(),
5978 "Unsupported major.minor version for dump time %u.%u",
5979 _major_version,
5980 _minor_version);
5981 }
5982
5983 // Check version numbers - we check this even with verifier off
5984 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
5985
5986 stream->guarantee_more(3, CHECK); // length, first cp tag
5987 u2 cp_size = stream->get_u2_fast();
5988
5989 guarantee_property(
5990 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5991 cp_size, CHECK);
5992
5993 _orig_cp_size = cp_size;
5994 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
5995 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
5996 }
5997 cp_size += _max_num_patched_klasses;
5998
5999 _cp = ConstantPool::allocate(_loader_data,
6000 cp_size,
6001 CHECK);
6002
6003 ConstantPool* const cp = _cp;
6004
6005 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6006
6007 assert(cp_size == (const u2)cp->length(), "invariant");
6008
6009 // ACCESS FLAGS
6010 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6011
6012 // Access flags
6013 jint flags;
6014 // JVM_ACC_MODULE is defined in JDK-9 and later.
6015 if (_major_version >= JAVA_9_VERSION) {
6016 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
6017 } else {
6018 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
6019 }
6020
6021 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6022 // Set abstract bit for old class files for backward compatibility
6023 flags |= JVM_ACC_ABSTRACT;
6024 }
6025
6026 verify_legal_class_modifiers(flags, CHECK);
6027
6028 short bad_constant = class_bad_constant_seen();
6029 if (bad_constant != 0) {
6030 // Do not throw CFE until after the access_flags are checked because if
6031 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6032 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6033 }
6034
6035 _access_flags.set_flags(flags);
6036
6037 // This class and superclass
6038 _this_class_index = stream->get_u2_fast();
6039 check_property(
6040 valid_cp_range(_this_class_index, cp_size) &&
6041 cp->tag_at(_this_class_index).is_unresolved_klass(),
6042 "Invalid this class index %u in constant pool in class file %s",
6043 _this_class_index, CHECK);
6044
6045 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6046 assert(class_name_in_cp != NULL, "class_name can't be null");
6047
6048 // Update _class_name to reflect the name in the constant pool
6049 update_class_name(class_name_in_cp);
6050
6051 // Don't need to check whether this class name is legal or not.
6052 // It has been checked when constant pool is parsed.
6053 // However, make sure it is not an array type.
6054 if (_need_verify) {
6055 guarantee_property(_class_name->char_at(0) != JVM_SIGNATURE_ARRAY,
6056 "Bad class name in class file %s",
6057 CHECK);
6058 }
6059
6060 // Checks if name in class file matches requested name
6061 if (_requested_name != NULL && _requested_name != _class_name) {
6062 ResourceMark rm(THREAD);
6063 Exceptions::fthrow(
6064 THREAD_AND_LOCATION,
6065 vmSymbols::java_lang_NoClassDefFoundError(),
6066 "%s (wrong name: %s)",
6067 _class_name->as_C_string(),
6068 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6069 );
6070 return;
6071 }
6072
6073 // if this is an anonymous class fix up its name if it's in the unnamed
6074 // package. Otherwise, throw IAE if it is in a different package than
6075 // its host class.
6076 if (_unsafe_anonymous_host != NULL) {
6077 fix_unsafe_anonymous_class_name(CHECK);
6078 }
6079
6080 // Verification prevents us from creating names with dots in them, this
6081 // asserts that that's the case.
6082 assert(is_internal_format(_class_name), "external class name format used internally");
6083
6084 if (!is_internal()) {
6085 LogTarget(Debug, class, preorder) lt;
6086 if (lt.is_enabled()){
6087 ResourceMark rm(THREAD);
6088 LogStream ls(lt);
6089 ls.print("%s", _class_name->as_klass_external_name());
6090 if (stream->source() != NULL) {
6091 ls.print(" source: %s", stream->source());
6092 }
6093 ls.cr();
6094 }
6095
6096 #if INCLUDE_CDS
6097 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6098 if (!ClassLoader::has_jrt_entry()) {
6099 warning("DumpLoadedClassList and CDS are not supported in exploded build");
6100 DumpLoadedClassList = NULL;
6101 } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6102 _unsafe_anonymous_host == NULL) {
6103 // Only dump the classes that can be stored into CDS archive.
6104 // Unsafe anonymous classes such as generated LambdaForm classes are also not included.
6105 oop class_loader = _loader_data->class_loader();
6106 ResourceMark rm(THREAD);
6107 bool skip = false;
6108 if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6109 // For the boot and platform class loaders, skip classes that are not found in the
6110 // java runtime image, such as those found in the --patch-module entries.
6111 // These classes can't be loaded from the archive during runtime.
6112 if (!stream->from_boot_loader_modules_image() && strncmp(stream->source(), "jrt:", 4) != 0) {
6113 skip = true;
6114 }
6115
6116 if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6117 // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6118 // as they can be loaded from the archive during runtime.
6119 skip = false;
6120 }
6121 }
6122 if (skip) {
6123 tty->print_cr("skip writing class %s from source %s to classlist file",
6124 _class_name->as_C_string(), stream->source());
6125 } else {
6126 classlist_file->print_cr("%s", _class_name->as_C_string());
6127 classlist_file->flush();
6128 }
6129 }
6130 }
6131 #endif
6132 }
6133
6134 // SUPERKLASS
6135 _super_class_index = stream->get_u2_fast();
6136 _super_klass = parse_super_class(cp,
6137 _super_class_index,
6138 _need_verify,
6139 CHECK);
6140
6141 // Interfaces
6142 _itfs_len = stream->get_u2_fast();
6143 parse_interfaces(stream,
6144 _itfs_len,
6145 cp,
6146 &_has_nonstatic_concrete_methods,
6147 CHECK);
6148
6149 assert(_local_interfaces != NULL, "invariant");
6150
6151 // Fields (offsets are filled in later)
6152 _fac = new FieldAllocationCount();
6153 parse_fields(stream,
6154 _access_flags.is_interface(),
6155 _fac,
6156 cp,
6157 cp_size,
6158 &_java_fields_count,
6159 CHECK);
6160
6161 assert(_fields != NULL, "invariant");
6162
6163 // Methods
6164 AccessFlags promoted_flags;
6165 parse_methods(stream,
6166 _access_flags.is_interface(),
6167 &promoted_flags,
6168 &_has_final_method,
6169 &_declares_nonstatic_concrete_methods,
6170 CHECK);
6171
6172 assert(_methods != NULL, "invariant");
6173
6174 // promote flags from parse_methods() to the klass' flags
6175 _access_flags.add_promoted_flags(promoted_flags.as_int());
6176
6177 if (_declares_nonstatic_concrete_methods) {
6178 _has_nonstatic_concrete_methods = true;
6179 }
6180
6181 // Additional attributes/annotations
6182 _parsed_annotations = new ClassAnnotationCollector();
6183 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6184
6185 assert(_inner_classes != NULL, "invariant");
6186
6187 // Finalize the Annotations metadata object,
6188 // now that all annotation arrays have been created.
6189 create_combined_annotations(CHECK);
6190
6191 // Make sure this is the end of class file stream
6192 guarantee_property(stream->at_eos(),
6193 "Extra bytes at the end of class file %s",
6194 CHECK);
6195
6196 // all bytes in stream read and parsed
6197 }
6198
6199 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6200 ConstantPool* cp,
6201 TRAPS) {
6202 assert(stream != NULL, "invariant");
6203 assert(stream->at_eos(), "invariant");
6204 assert(cp != NULL, "invariant");
6205 assert(_loader_data != NULL, "invariant");
6206
6207 if (_class_name == vmSymbols::java_lang_Object()) {
6208 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6209 "java.lang.Object cannot implement an interface in class file %s",
6210 CHECK);
6211 }
6212 // We check super class after class file is parsed and format is checked
6213 if (_super_class_index > 0 && NULL ==_super_klass) {
6214 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6215 if (_access_flags.is_interface()) {
6216 // Before attempting to resolve the superclass, check for class format
6217 // errors not checked yet.
6218 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6219 "Interfaces must have java.lang.Object as superclass in class file %s",
6220 CHECK);
6221 }
6222 Handle loader(THREAD, _loader_data->class_loader());
6223 _super_klass = (const InstanceKlass*)
6224 SystemDictionary::resolve_super_or_fail(_class_name,
6225 super_class_name,
6226 loader,
6227 _protection_domain,
6228 true,
6229 CHECK);
6230 }
6231
6232 if (_super_klass != NULL) {
6233 if (_super_klass->has_nonstatic_concrete_methods()) {
6234 _has_nonstatic_concrete_methods = true;
6235 }
6236
6237 if (_super_klass->is_interface()) {
6238 ResourceMark rm(THREAD);
6239 Exceptions::fthrow(
6240 THREAD_AND_LOCATION,
6241 vmSymbols::java_lang_IncompatibleClassChangeError(),
6242 "class %s has interface %s as super class",
6243 _class_name->as_klass_external_name(),
6244 _super_klass->external_name()
6245 );
6246 return;
6247 }
6248 // Make sure super class is not final
6249 if (_super_klass->is_final()) {
6250 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6251 }
6252 }
6253
6254 // Compute the transitive list of all unique interfaces implemented by this class
6255 _transitive_interfaces =
6256 compute_transitive_interfaces(_super_klass,
6257 _local_interfaces,
6258 _loader_data,
6259 CHECK);
6260
6261 assert(_transitive_interfaces != NULL, "invariant");
6262
6263 // sort methods
6264 _method_ordering = sort_methods(_methods);
6265
6266 _all_mirandas = new GrowableArray<Method*>(20);
6267
6268 Handle loader(THREAD, _loader_data->class_loader());
6269 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6270 &_num_miranda_methods,
6271 _all_mirandas,
6272 _super_klass,
6273 _methods,
6274 _access_flags,
6275 _major_version,
6276 loader,
6277 _class_name,
6278 _local_interfaces,
6279 CHECK);
6280
6281 // Size of Java itable (in words)
6282 _itable_size = _access_flags.is_interface() ? 0 :
6283 klassItable::compute_itable_size(_transitive_interfaces);
6284
6285 assert(_fac != NULL, "invariant");
6286 assert(_parsed_annotations != NULL, "invariant");
6287
6288 _field_info = new FieldLayoutInfo();
6289 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6290
6291 // Compute reference typ
6292 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6293
6294 }
6295
6296 void ClassFileParser::set_klass(InstanceKlass* klass) {
6297
6298 #ifdef ASSERT
6299 if (klass != NULL) {
6300 assert(NULL == _klass, "leaking?");
6301 }
6302 #endif
6303
6304 _klass = klass;
6305 }
6306
6307 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6308
6309 #ifdef ASSERT
6310 if (klass != NULL) {
6311 assert(NULL == _klass_to_deallocate, "leaking?");
6312 }
6313 #endif
6314
6315 _klass_to_deallocate = klass;
6316 }
6317
6318 // Caller responsible for ResourceMark
6319 // clone stream with rewound position
6320 const ClassFileStream* ClassFileParser::clone_stream() const {
6321 assert(_stream != NULL, "invariant");
6322
6323 return _stream->clone();
6324 }
6325 // ----------------------------------------------------------------------------
6326 // debugging
6327
6328 #ifdef ASSERT
6329
6330 // return true if class_name contains no '.' (internal format is '/')
6331 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6332 if (class_name != NULL) {
6333 ResourceMark rm;
6334 char* name = class_name->as_C_string();
6335 return strchr(name, JVM_SIGNATURE_DOT) == NULL;
6336 } else {
6337 return true;
6338 }
6339 }
6340
6341 #endif