1 /*
2 * Copyright (c) 1997, 2017, 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 "aot/aotLoader.hpp"
26 #include "classfile/classFileParser.hpp"
27 #include "classfile/classFileStream.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/defaultMethods.hpp"
31 #include "classfile/dictionary.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/moduleEntry.hpp"
34 #include "classfile/symbolTable.hpp"
35 #include "classfile/systemDictionary.hpp"
36 #include "classfile/verificationType.hpp"
37 #include "classfile/verifier.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "gc/shared/gcLocker.hpp"
40 #include "logging/log.hpp"
41 #include "memory/allocation.hpp"
42 #include "memory/metadataFactory.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "memory/universe.inline.hpp"
46 #include "oops/annotations.hpp"
47 #include "oops/fieldStreams.hpp"
48 #include "oops/instanceKlass.hpp"
49 #include "oops/instanceMirrorKlass.hpp"
50 #include "oops/klass.inline.hpp"
51 #include "oops/klassVtable.hpp"
52 #include "oops/metadata.hpp"
53 #include "oops/method.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "oops/symbol.hpp"
56 #include "oops/valueKlass.hpp"
57 #include "prims/jvm.h"
58 #include "prims/jvmtiExport.hpp"
59 #include "prims/jvmtiThreadState.hpp"
60 #include "runtime/javaCalls.hpp"
61 #include "runtime/perfData.hpp"
62 #include "runtime/reflection.hpp"
63 #include "runtime/signature.hpp"
64 #include "runtime/timer.hpp"
65 #include "services/classLoadingService.hpp"
66 #include "services/threadService.hpp"
67 #include "trace/traceMacros.hpp"
68 #include "utilities/exceptions.hpp"
69 #include "utilities/globalDefinitions.hpp"
70 #include "utilities/growableArray.hpp"
71 #include "utilities/macros.hpp"
72 #include "utilities/ostream.hpp"
73 #include "utilities/resourceHash.hpp"
74 #if INCLUDE_CDS
75 #include "classfile/systemDictionaryShared.hpp"
76 #endif
77
78 // We generally try to create the oops directly when parsing, rather than
79 // allocating temporary data structures and copying the bytes twice. A
80 // temporary area is only needed when parsing utf8 entries in the constant
81 // pool and when parsing line number tables.
82
83 // We add assert in debug mode when class format is not checked.
84
85 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
86 #define JAVA_MIN_SUPPORTED_VERSION 45
87 #define JAVA_MAX_SUPPORTED_VERSION 53
88 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 1
89
90 // Used for two backward compatibility reasons:
91 // - to check for new additions to the class file format in JDK1.5
92 // - to check for bug fixes in the format checker in JDK1.5
93 #define JAVA_1_5_VERSION 49
94
95 // Used for backward compatibility reasons:
96 // - to check for javac bug fixes that happened after 1.5
97 // - also used as the max version when running in jdk6
98 #define JAVA_6_VERSION 50
99
100 // Used for backward compatibility reasons:
101 // - to disallow argument and require ACC_STATIC for <clinit> methods
102 #define JAVA_7_VERSION 51
103
104 // Extension method support.
105 #define JAVA_8_VERSION 52
106
107 #define JAVA_9_VERSION 53
108
109 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
110 assert((bad_constant == 19 || bad_constant == 20) && _major_version >= JAVA_9_VERSION,
111 "Unexpected bad constant pool entry");
112 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
113 }
114
115 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
116 ConstantPool* cp,
117 const int length,
118 TRAPS) {
119 assert(stream != NULL, "invariant");
120 assert(cp != NULL, "invariant");
121
122 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
123 // this function (_current can be allocated in a register, with scalar
124 // replacement of aggregates). The _current pointer is copied back to
125 // stream() when this function returns. DON'T call another method within
126 // this method that uses stream().
127 const ClassFileStream cfs1 = *stream;
128 const ClassFileStream* const cfs = &cfs1;
129
130 assert(cfs->allocated_on_stack(), "should be local");
131 debug_only(const u1* const old_current = stream->current();)
132
133 // Used for batching symbol allocations.
134 const char* names[SymbolTable::symbol_alloc_batch_size];
135 int lengths[SymbolTable::symbol_alloc_batch_size];
136 int indices[SymbolTable::symbol_alloc_batch_size];
137 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
138 int names_count = 0;
139
140 // parsing Index 0 is unused
141 for (int index = 1; index < length; index++) {
142 // Each of the following case guarantees one more byte in the stream
143 // for the following tag or the access_flags following constant pool,
144 // so we don't need bounds-check for reading tag.
145 const u1 tag = cfs->get_u1_fast();
146 switch (tag) {
147 case JVM_CONSTANT_Class : {
148 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
149 const u2 name_index = cfs->get_u2_fast();
150 cp->klass_index_at_put(index, name_index);
151 break;
152 }
153 case JVM_CONSTANT_Fieldref: {
154 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
155 const u2 class_index = cfs->get_u2_fast();
156 const u2 name_and_type_index = cfs->get_u2_fast();
157 cp->field_at_put(index, class_index, name_and_type_index);
158 break;
159 }
160 case JVM_CONSTANT_Methodref: {
161 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
162 const u2 class_index = cfs->get_u2_fast();
163 const u2 name_and_type_index = cfs->get_u2_fast();
164 cp->method_at_put(index, class_index, name_and_type_index);
165 break;
166 }
167 case JVM_CONSTANT_InterfaceMethodref: {
168 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
169 const u2 class_index = cfs->get_u2_fast();
170 const u2 name_and_type_index = cfs->get_u2_fast();
171 cp->interface_method_at_put(index, class_index, name_and_type_index);
172 break;
173 }
174 case JVM_CONSTANT_String : {
175 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
176 const u2 string_index = cfs->get_u2_fast();
177 cp->string_index_at_put(index, string_index);
178 break;
179 }
180 case JVM_CONSTANT_MethodHandle :
181 case JVM_CONSTANT_MethodType: {
182 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
183 classfile_parse_error(
184 "Class file version does not support constant tag %u in class file %s",
185 tag, CHECK);
186 }
187 if (tag == JVM_CONSTANT_MethodHandle) {
188 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
189 const u1 ref_kind = cfs->get_u1_fast();
190 const u2 method_index = cfs->get_u2_fast();
191 cp->method_handle_index_at_put(index, ref_kind, method_index);
192 }
193 else if (tag == JVM_CONSTANT_MethodType) {
194 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
195 const u2 signature_index = cfs->get_u2_fast();
196 cp->method_type_index_at_put(index, signature_index);
197 }
198 else {
199 ShouldNotReachHere();
200 }
201 break;
202 }
203 case JVM_CONSTANT_InvokeDynamic : {
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 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
210 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
211 const u2 name_and_type_index = cfs->get_u2_fast();
212 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
213 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
214 }
215 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
216 break;
217 }
218 case JVM_CONSTANT_Integer: {
219 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
220 const u4 bytes = cfs->get_u4_fast();
221 cp->int_at_put(index, (jint)bytes);
222 break;
223 }
224 case JVM_CONSTANT_Float: {
225 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
226 const u4 bytes = cfs->get_u4_fast();
227 cp->float_at_put(index, *(jfloat*)&bytes);
228 break;
229 }
230 case JVM_CONSTANT_Long: {
231 // A mangled type might cause you to overrun allocated memory
232 guarantee_property(index + 1 < length,
233 "Invalid constant pool entry %u in class file %s",
234 index,
235 CHECK);
236 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
237 const u8 bytes = cfs->get_u8_fast();
238 cp->long_at_put(index, bytes);
239 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
240 break;
241 }
242 case JVM_CONSTANT_Double: {
243 // A mangled type might cause you to overrun allocated memory
244 guarantee_property(index+1 < length,
245 "Invalid constant pool entry %u in class file %s",
246 index,
247 CHECK);
248 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
249 const u8 bytes = cfs->get_u8_fast();
250 cp->double_at_put(index, *(jdouble*)&bytes);
251 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
252 break;
253 }
254 case JVM_CONSTANT_NameAndType: {
255 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
256 const u2 name_index = cfs->get_u2_fast();
257 const u2 signature_index = cfs->get_u2_fast();
258 cp->name_and_type_at_put(index, name_index, signature_index);
259 break;
260 }
261 case JVM_CONSTANT_Utf8 : {
262 cfs->guarantee_more(2, CHECK); // utf8_length
263 u2 utf8_length = cfs->get_u2_fast();
264 const u1* utf8_buffer = cfs->get_u1_buffer();
265 assert(utf8_buffer != NULL, "null utf8 buffer");
266 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
267 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
268 cfs->skip_u1_fast(utf8_length);
269
270 // Before storing the symbol, make sure it's legal
271 if (_need_verify) {
272 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
273 }
274
275 if (has_cp_patch_at(index)) {
276 Handle patch = clear_cp_patch_at(index);
277 guarantee_property(java_lang_String::is_instance(patch()),
278 "Illegal utf8 patch at %d in class file %s",
279 index,
280 CHECK);
281 const char* const str = java_lang_String::as_utf8_string(patch());
282 // (could use java_lang_String::as_symbol instead, but might as well batch them)
283 utf8_buffer = (const u1*) str;
284 utf8_length = (int) strlen(str);
285 }
286
287 unsigned int hash;
288 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
289 utf8_length,
290 hash);
291 if (result == NULL) {
292 names[names_count] = (const char*)utf8_buffer;
293 lengths[names_count] = utf8_length;
294 indices[names_count] = index;
295 hashValues[names_count++] = hash;
296 if (names_count == SymbolTable::symbol_alloc_batch_size) {
297 SymbolTable::new_symbols(_loader_data,
298 cp,
299 names_count,
300 names,
301 lengths,
302 indices,
303 hashValues,
304 CHECK);
305 names_count = 0;
306 }
307 } else {
308 cp->symbol_at_put(index, result);
309 }
310 break;
311 }
312 case 19:
313 case 20: {
314 // Record that an error occurred in these two cases but keep parsing so
315 // that ACC_Module can be checked for in the access_flags. Need to
316 // throw NoClassDefFoundError in that case.
317 if (_major_version >= JAVA_9_VERSION) {
318 cfs->guarantee_more(3, CHECK);
319 cfs->get_u2_fast();
320 set_class_bad_constant_seen(tag);
321 break;
322 }
323 }
324 default: {
325 classfile_parse_error("Unknown constant tag %u in class file %s",
326 tag,
327 CHECK);
328 break;
329 }
330 } // end of switch(tag)
331 } // end of for
332
333 // Allocate the remaining symbols
334 if (names_count > 0) {
335 SymbolTable::new_symbols(_loader_data,
336 cp,
337 names_count,
338 names,
339 lengths,
340 indices,
341 hashValues,
342 CHECK);
343 }
344
345 // Copy _current pointer of local copy back to stream.
346 assert(stream->current() == old_current, "non-exclusive use of stream");
347 stream->set_current(cfs1.current());
348
349 }
350
351 static inline bool valid_cp_range(int index, int length) {
352 return (index > 0 && index < length);
353 }
354
355 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
356 assert(cp != NULL, "invariant");
357 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
358 return cp->symbol_at(index);
359 }
360 return NULL;
361 }
362
363 #ifdef ASSERT
364 PRAGMA_DIAG_PUSH
365 PRAGMA_FORMAT_NONLITERAL_IGNORED
366 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
367 ResourceMark rm(THREAD);
368 fatal(msg, _class_name->as_C_string());
369 }
370
371 void ClassFileParser::report_assert_property_failure(const char* msg,
372 int index,
373 TRAPS) const {
374 ResourceMark rm(THREAD);
375 fatal(msg, index, _class_name->as_C_string());
376 }
377 PRAGMA_DIAG_POP
378 #endif
379
380 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
381 ConstantPool* const cp,
382 const int length,
383 TRAPS) {
384 assert(cp != NULL, "invariant");
385 assert(stream != NULL, "invariant");
386
387 // parsing constant pool entries
388 parse_constant_pool_entries(stream, cp, length, CHECK);
389 if (class_bad_constant_seen() != 0) {
390 // a bad CP entry has been detected previously so stop parsing and just return.
391 return;
392 }
393
394 int index = 1; // declared outside of loops for portability
395 int num_klasses = 0;
396
397 // first verification pass - validate cross references
398 // and fixup class and string constants
399 for (index = 1; index < length; index++) { // Index 0 is unused
400 const jbyte tag = cp->tag_at(index).value();
401 switch (tag) {
402 case JVM_CONSTANT_Class: {
403 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
404 break;
405 }
406 case JVM_CONSTANT_Fieldref:
407 // fall through
408 case JVM_CONSTANT_Methodref:
409 // fall through
410 case JVM_CONSTANT_InterfaceMethodref: {
411 if (!_need_verify) break;
412 const int klass_ref_index = cp->klass_ref_index_at(index);
413 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
414 check_property(valid_klass_reference_at(klass_ref_index),
415 "Invalid constant pool index %u in class file %s",
416 klass_ref_index, CHECK);
417 check_property(valid_cp_range(name_and_type_ref_index, length) &&
418 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
419 "Invalid constant pool index %u in class file %s",
420 name_and_type_ref_index, CHECK);
421 break;
422 }
423 case JVM_CONSTANT_String: {
424 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
425 break;
426 }
427 case JVM_CONSTANT_Integer:
428 break;
429 case JVM_CONSTANT_Float:
430 break;
431 case JVM_CONSTANT_Long:
432 case JVM_CONSTANT_Double: {
433 index++;
434 check_property(
435 (index < length && cp->tag_at(index).is_invalid()),
436 "Improper constant pool long/double index %u in class file %s",
437 index, CHECK);
438 break;
439 }
440 case JVM_CONSTANT_NameAndType: {
441 if (!_need_verify) break;
442 const int name_ref_index = cp->name_ref_index_at(index);
443 const int signature_ref_index = cp->signature_ref_index_at(index);
444 check_property(valid_symbol_at(name_ref_index),
445 "Invalid constant pool index %u in class file %s",
446 name_ref_index, CHECK);
447 check_property(valid_symbol_at(signature_ref_index),
448 "Invalid constant pool index %u in class file %s",
449 signature_ref_index, CHECK);
450 break;
451 }
452 case JVM_CONSTANT_Utf8:
453 break;
454 case JVM_CONSTANT_UnresolvedClass: // fall-through
455 case JVM_CONSTANT_UnresolvedClassInError: {
456 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
457 break;
458 }
459 case JVM_CONSTANT_ClassIndex: {
460 const int class_index = cp->klass_index_at(index);
461 check_property(valid_symbol_at(class_index),
462 "Invalid constant pool index %u in class file %s",
463 class_index, CHECK);
464 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
465 break;
466 }
467 case JVM_CONSTANT_StringIndex: {
468 const int string_index = cp->string_index_at(index);
469 check_property(valid_symbol_at(string_index),
470 "Invalid constant pool index %u in class file %s",
471 string_index, CHECK);
472 Symbol* const sym = cp->symbol_at(string_index);
473 cp->unresolved_string_at_put(index, sym);
474 break;
475 }
476 case JVM_CONSTANT_MethodHandle: {
477 const int ref_index = cp->method_handle_index_at(index);
478 check_property(valid_cp_range(ref_index, length),
479 "Invalid constant pool index %u in class file %s",
480 ref_index, CHECK);
481 const constantTag tag = cp->tag_at(ref_index);
482 const int ref_kind = cp->method_handle_ref_kind_at(index);
483
484 switch (ref_kind) {
485 case JVM_REF_getField:
486 case JVM_REF_getStatic:
487 case JVM_REF_putField:
488 case JVM_REF_putStatic: {
489 check_property(
490 tag.is_field(),
491 "Invalid constant pool index %u in class file %s (not a field)",
492 ref_index, CHECK);
493 break;
494 }
495 case JVM_REF_invokeVirtual:
496 case JVM_REF_newInvokeSpecial: {
497 check_property(
498 tag.is_method(),
499 "Invalid constant pool index %u in class file %s (not a method)",
500 ref_index, CHECK);
501 break;
502 }
503 case JVM_REF_invokeStatic:
504 case JVM_REF_invokeSpecial: {
505 check_property(
506 tag.is_method() ||
507 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
508 "Invalid constant pool index %u in class file %s (not a method)",
509 ref_index, CHECK);
510 break;
511 }
512 case JVM_REF_invokeInterface: {
513 check_property(
514 tag.is_interface_method(),
515 "Invalid constant pool index %u in class file %s (not an interface method)",
516 ref_index, CHECK);
517 break;
518 }
519 default: {
520 classfile_parse_error(
521 "Bad method handle kind at constant pool index %u in class file %s",
522 index, CHECK);
523 }
524 } // switch(refkind)
525 // Keep the ref_index unchanged. It will be indirected at link-time.
526 break;
527 } // case MethodHandle
528 case JVM_CONSTANT_MethodType: {
529 const int ref_index = cp->method_type_index_at(index);
530 check_property(valid_symbol_at(ref_index),
531 "Invalid constant pool index %u in class file %s",
532 ref_index, CHECK);
533 break;
534 }
535 case JVM_CONSTANT_InvokeDynamic: {
536 const int name_and_type_ref_index =
537 cp->invoke_dynamic_name_and_type_ref_index_at(index);
538
539 check_property(valid_cp_range(name_and_type_ref_index, length) &&
540 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
541 "Invalid constant pool index %u in class file %s",
542 name_and_type_ref_index, CHECK);
543 // bootstrap specifier index must be checked later,
544 // when BootstrapMethods attr is available
545 break;
546 }
547 default: {
548 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
549 ShouldNotReachHere();
550 break;
551 }
552 } // switch(tag)
553 } // end of for
554
555 _first_patched_klass_resolved_index = num_klasses;
556 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
557
558 if (_cp_patches != NULL) {
559 // need to treat this_class specially...
560
561 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
562 // for now. These will be replaced with actual names of the patched classes in patch_class().
563 Symbol* s = vmSymbols::star_name();
564 for (int n=_orig_cp_size; n<cp->length(); n++) {
565 cp->symbol_at_put(n, s);
566 }
567
568 int this_class_index;
569 {
570 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
571 const u1* const mark = stream->current();
572 stream->skip_u2_fast(1); // skip flags
573 this_class_index = stream->get_u2_fast();
574 stream->set_current(mark); // revert to mark
575 }
576
577 for (index = 1; index < length; index++) { // Index 0 is unused
578 if (has_cp_patch_at(index)) {
579 guarantee_property(index != this_class_index,
580 "Illegal constant pool patch to self at %d in class file %s",
581 index, CHECK);
582 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
583 }
584 }
585 }
586
587 if (!_need_verify) {
588 return;
589 }
590
591 // second verification pass - checks the strings are of the right format.
592 // but not yet to the other entries
593 for (index = 1; index < length; index++) {
594 const jbyte tag = cp->tag_at(index).value();
595 switch (tag) {
596 case JVM_CONSTANT_UnresolvedClass: {
597 const Symbol* const class_name = cp->klass_name_at(index);
598 // check the name, even if _cp_patches will overwrite it
599 verify_legal_class_name(class_name, CHECK);
600 break;
601 }
602 case JVM_CONSTANT_NameAndType: {
603 if (_need_verify) {
604 const int sig_index = cp->signature_ref_index_at(index);
605 const int name_index = cp->name_ref_index_at(index);
606 const Symbol* const name = cp->symbol_at(name_index);
607 const Symbol* const sig = cp->symbol_at(sig_index);
608 guarantee_property(sig->utf8_length() != 0,
609 "Illegal zero length constant pool entry at %d in class %s",
610 sig_index, CHECK);
611 guarantee_property(name->utf8_length() != 0,
612 "Illegal zero length constant pool entry at %d in class %s",
613 name_index, CHECK);
614
615 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
616 // Format check method name and signature
617 verify_legal_method_name(name, CHECK);
618 verify_legal_method_signature(name, sig, CHECK);
619 } else {
620 // Format check field name and signature
621 verify_legal_field_name(name, CHECK);
622 verify_legal_field_signature(name, sig, CHECK);
623 }
624 }
625 break;
626 }
627 case JVM_CONSTANT_InvokeDynamic:
628 case JVM_CONSTANT_Fieldref:
629 case JVM_CONSTANT_Methodref:
630 case JVM_CONSTANT_InterfaceMethodref: {
631 const int name_and_type_ref_index =
632 cp->name_and_type_ref_index_at(index);
633 // already verified to be utf8
634 const int name_ref_index =
635 cp->name_ref_index_at(name_and_type_ref_index);
636 // already verified to be utf8
637 const int signature_ref_index =
638 cp->signature_ref_index_at(name_and_type_ref_index);
639 const Symbol* const name = cp->symbol_at(name_ref_index);
640 const Symbol* const signature = cp->symbol_at(signature_ref_index);
641 if (tag == JVM_CONSTANT_Fieldref) {
642 if (_need_verify) {
643 // Field name and signature are verified above, when iterating NameAndType_info.
644 // Need only to be sure signature is non-zero length and the right type.
645 if (signature->utf8_length() == 0 ||
646 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
647 throwIllegalSignature("Field", name, signature, CHECK);
648 }
649 }
650 } else {
651 if (_need_verify) {
652 // Method name and signature are verified above, when iterating NameAndType_info.
653 // Need only to be sure signature is non-zero length and the right type.
654 if (signature->utf8_length() == 0 ||
655 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
656 throwIllegalSignature("Method", name, signature, CHECK);
657 }
658 }
659 // 4509014: If a class method name begins with '<', it must be "<init>"
660 const unsigned int name_len = name->utf8_length();
661 if (tag == JVM_CONSTANT_Methodref &&
662 name_len != 0 &&
663 name->byte_at(0) == '<' &&
664 name != vmSymbols::object_initializer_name()) {
665 classfile_parse_error(
666 "Bad method name at constant pool index %u in class file %s",
667 name_ref_index, CHECK);
668 }
669 }
670 break;
671 }
672 case JVM_CONSTANT_MethodHandle: {
673 const int ref_index = cp->method_handle_index_at(index);
674 const int ref_kind = cp->method_handle_ref_kind_at(index);
675 switch (ref_kind) {
676 case JVM_REF_invokeVirtual:
677 case JVM_REF_invokeStatic:
678 case JVM_REF_invokeSpecial:
679 case JVM_REF_newInvokeSpecial: {
680 const int name_and_type_ref_index =
681 cp->name_and_type_ref_index_at(ref_index);
682 const int name_ref_index =
683 cp->name_ref_index_at(name_and_type_ref_index);
684 const Symbol* const name = cp->symbol_at(name_ref_index);
685 if (ref_kind == JVM_REF_newInvokeSpecial) {
686 if (name != vmSymbols::object_initializer_name()) {
687 classfile_parse_error(
688 "Bad constructor name at constant pool index %u in class file %s",
689 name_ref_index, CHECK);
690 }
691 } else {
692 if (name == vmSymbols::object_initializer_name()) {
693 classfile_parse_error(
694 "Bad method name at constant pool index %u in class file %s",
695 name_ref_index, CHECK);
696 }
697 }
698 break;
699 }
700 // Other ref_kinds are already fully checked in previous pass.
701 } // switch(ref_kind)
702 break;
703 }
704 case JVM_CONSTANT_MethodType: {
705 const Symbol* const no_name = vmSymbols::type_name(); // place holder
706 const Symbol* const signature = cp->method_type_signature_at(index);
707 verify_legal_method_signature(no_name, signature, CHECK);
708 break;
709 }
710 case JVM_CONSTANT_Utf8: {
711 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
712 }
713 } // switch(tag)
714 } // end of for
715 }
716
717 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
718 int name_index = _orig_cp_size + _num_patched_klasses;
719 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
720
721 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
722 _num_patched_klasses ++;
723 }
724
725 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
726 int index,
727 Handle patch,
728 TRAPS) {
729 assert(cp != NULL, "invariant");
730
731 BasicType patch_type = T_VOID;
732
733 switch (cp->tag_at(index).value()) {
734
735 case JVM_CONSTANT_UnresolvedClass: {
736 // Patching a class means pre-resolving it.
737 // The name in the constant pool is ignored.
738 if (java_lang_Class::is_instance(patch())) {
739 guarantee_property(!java_lang_Class::is_primitive(patch()),
740 "Illegal class patch at %d in class file %s",
741 index, CHECK);
742 Klass* k = java_lang_Class::as_Klass(patch());
743 patch_class(cp, index, k, k->name());
744 } else {
745 guarantee_property(java_lang_String::is_instance(patch()),
746 "Illegal class patch at %d in class file %s",
747 index, CHECK);
748 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
749 patch_class(cp, index, NULL, name);
750 }
751 break;
752 }
753
754 case JVM_CONSTANT_String: {
755 // skip this patch and don't clear it. Needs the oop array for resolved
756 // references to be created first.
757 return;
758 }
759 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
760 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
761 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
762 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
763 patch_prim:
764 {
765 jvalue value;
766 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
767 guarantee_property(value_type == patch_type,
768 "Illegal primitive patch at %d in class file %s",
769 index, CHECK);
770 switch (value_type) {
771 case T_INT: cp->int_at_put(index, value.i); break;
772 case T_FLOAT: cp->float_at_put(index, value.f); break;
773 case T_LONG: cp->long_at_put(index, value.j); break;
774 case T_DOUBLE: cp->double_at_put(index, value.d); break;
775 default: assert(false, "");
776 }
777 } // end patch_prim label
778 break;
779
780 default: {
781 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
782 guarantee_property(!has_cp_patch_at(index),
783 "Illegal unexpected patch at %d in class file %s",
784 index, CHECK);
785 return;
786 }
787 } // end of switch(tag)
788
789 // On fall-through, mark the patch as used.
790 clear_cp_patch_at(index);
791 }
792 class NameSigHash: public ResourceObj {
793 public:
794 const Symbol* _name; // name
795 const Symbol* _sig; // signature
796 NameSigHash* _next; // Next entry in hash table
797 };
798
799 static const int HASH_ROW_SIZE = 256;
800
801 static unsigned int hash(const Symbol* name, const Symbol* sig) {
802 unsigned int raw_hash = 0;
803 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
804 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
805
806 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
807 }
808
809
810 static void initialize_hashtable(NameSigHash** table) {
811 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
812 }
813 // Return false if the name/sig combination is found in table.
814 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
815 // The old format checker uses heap sort to find duplicates.
816 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
817 // of table since we don't expect Symbol*'s to move.
818 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
819 assert(name != NULL, "name in constant pool is NULL");
820
821 // First lookup for duplicates
822 int index = hash(name, sig);
823 NameSigHash* entry = table[index];
824 while (entry != NULL) {
825 if (entry->_name == name && entry->_sig == sig) {
826 return false;
827 }
828 entry = entry->_next;
829 }
830
831 // No duplicate is found, allocate a new entry and fill it.
832 entry = new NameSigHash();
833 entry->_name = name;
834 entry->_sig = sig;
835
836 // Insert into hash table
837 entry->_next = table[index];
838 table[index] = entry;
839
840 return true;
841 }
842
843 // Side-effects: populates the _local_interfaces field
844 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
845 const int itfs_len,
846 ConstantPool* const cp,
847 bool* const has_nonstatic_concrete_methods,
848 TRAPS) {
849 assert(stream != NULL, "invariant");
850 assert(cp != NULL, "invariant");
851 assert(has_nonstatic_concrete_methods != NULL, "invariant");
852
853 if (itfs_len == 0) {
854 _local_interfaces = Universe::the_empty_klass_array();
855 } else {
856 assert(itfs_len > 0, "only called for len>0");
857 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
858
859 int index;
860 for (index = 0; index < itfs_len; index++) {
861 const u2 interface_index = stream->get_u2(CHECK);
862 Klass* interf;
863 check_property(
864 valid_klass_reference_at(interface_index),
865 "Interface name has bad constant pool index %u in class file %s",
866 interface_index, CHECK);
867 if (cp->tag_at(interface_index).is_klass()) {
868 interf = cp->resolved_klass_at(interface_index);
869 } else {
870 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
871
872 // Don't need to check legal name because it's checked when parsing constant pool.
873 // But need to make sure it's not an array type.
874 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
875 "Bad interface name in class file %s", CHECK);
876
877 // Call resolve_super so classcircularity is checked
878 interf = SystemDictionary::resolve_super_or_fail(
879 _class_name,
880 unresolved_klass,
881 Handle(THREAD, _loader_data->class_loader()),
882 _protection_domain,
883 false,
884 CHECK);
885 }
886
887 if (!interf->is_interface()) {
888 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
889 "Implementing class");
890 }
891
892 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
893 *has_nonstatic_concrete_methods = true;
894 }
895 _local_interfaces->at_put(index, interf);
896 }
897
898 if (!_need_verify || itfs_len <= 1) {
899 return;
900 }
901
902 // Check if there's any duplicates in interfaces
903 ResourceMark rm(THREAD);
904 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
905 NameSigHash*,
906 HASH_ROW_SIZE);
907 initialize_hashtable(interface_names);
908 bool dup = false;
909 const Symbol* name = NULL;
910 {
911 debug_only(NoSafepointVerifier nsv;)
912 for (index = 0; index < itfs_len; index++) {
913 const Klass* const k = _local_interfaces->at(index);
914 name = InstanceKlass::cast(k)->name();
915 // If no duplicates, add (name, NULL) in hashtable interface_names.
916 if (!put_after_lookup(name, NULL, interface_names)) {
917 dup = true;
918 break;
919 }
920 }
921 }
922 if (dup) {
923 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
924 name->as_C_string(), CHECK);
925 }
926 }
927 }
928
929 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
930 int constantvalue_index,
931 int signature_index,
932 TRAPS) const {
933 // Make sure the constant pool entry is of a type appropriate to this field
934 guarantee_property(
935 (constantvalue_index > 0 &&
936 constantvalue_index < cp->length()),
937 "Bad initial value index %u in ConstantValue attribute in class file %s",
938 constantvalue_index, CHECK);
939
940 const constantTag value_type = cp->tag_at(constantvalue_index);
941 switch(cp->basic_type_for_signature_at(signature_index)) {
942 case T_LONG: {
943 guarantee_property(value_type.is_long(),
944 "Inconsistent constant value type in class file %s",
945 CHECK);
946 break;
947 }
948 case T_FLOAT: {
949 guarantee_property(value_type.is_float(),
950 "Inconsistent constant value type in class file %s",
951 CHECK);
952 break;
953 }
954 case T_DOUBLE: {
955 guarantee_property(value_type.is_double(),
956 "Inconsistent constant value type in class file %s",
957 CHECK);
958 break;
959 }
960 case T_BYTE:
961 case T_CHAR:
962 case T_SHORT:
963 case T_BOOLEAN:
964 case T_INT: {
965 guarantee_property(value_type.is_int(),
966 "Inconsistent constant value type in class file %s",
967 CHECK);
968 break;
969 }
970 case T_OBJECT: {
971 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
972 && value_type.is_string()),
973 "Bad string initial value in class file %s",
974 CHECK);
975 break;
976 }
977 default: {
978 classfile_parse_error("Unable to set initial value %u in class file %s",
979 constantvalue_index,
980 CHECK);
981 }
982 }
983 }
984
985 class AnnotationCollector : public ResourceObj{
986 public:
987 enum Location { _in_field, _in_method, _in_class };
988 enum ID {
989 _unknown = 0,
990 _method_CallerSensitive,
991 _method_ForceInline,
992 _method_DontInline,
993 _method_InjectedProfile,
994 _method_LambdaForm_Compiled,
995 _method_LambdaForm_Hidden,
996 _method_HotSpotIntrinsicCandidate,
997 _jdk_internal_vm_annotation_Contended,
998 _field_Stable,
999 _jdk_internal_vm_annotation_ReservedStackAccess,
1000 _jvm_internal_value_DeriveValueType,
1001 _annotation_LIMIT
1002 };
1003 const Location _location;
1004 int _annotations_present;
1005 u2 _contended_group;
1006
1007 AnnotationCollector(Location location)
1008 : _location(location), _annotations_present(0)
1009 {
1010 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1011 }
1012 // If this annotation name has an ID, report it (or _none).
1013 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1014 // Set the annotation name:
1015 void set_annotation(ID id) {
1016 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1017 _annotations_present |= nth_bit((int)id);
1018 }
1019
1020 void remove_annotation(ID id) {
1021 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1022 _annotations_present &= ~nth_bit((int)id);
1023 }
1024
1025 // Report if the annotation is present.
1026 bool has_any_annotations() const { return _annotations_present != 0; }
1027 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1028
1029 void set_contended_group(u2 group) { _contended_group = group; }
1030 u2 contended_group() const { return _contended_group; }
1031
1032 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1033
1034 void set_stable(bool stable) { set_annotation(_field_Stable); }
1035 bool is_stable() const { return has_annotation(_field_Stable); }
1036
1037 bool is_derive_value_type() const { return has_annotation(_jvm_internal_value_DeriveValueType); }
1038 };
1039
1040 // This class also doubles as a holder for metadata cleanup.
1041 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1042 private:
1043 ClassLoaderData* _loader_data;
1044 AnnotationArray* _field_annotations;
1045 AnnotationArray* _field_type_annotations;
1046 public:
1047 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1048 AnnotationCollector(_in_field),
1049 _loader_data(loader_data),
1050 _field_annotations(NULL),
1051 _field_type_annotations(NULL) {}
1052 ~FieldAnnotationCollector();
1053 void apply_to(FieldInfo* f);
1054 AnnotationArray* field_annotations() { return _field_annotations; }
1055 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1056
1057 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1058 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1059 };
1060
1061 class MethodAnnotationCollector : public AnnotationCollector{
1062 public:
1063 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1064 void apply_to(methodHandle m);
1065 };
1066
1067 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1068 public:
1069 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1070 void apply_to(InstanceKlass* ik);
1071 };
1072
1073
1074 static int skip_annotation_value(const u1*, int, int); // fwd decl
1075
1076 // Safely increment index by val if does not pass limit
1077 #define SAFE_ADD(index, limit, val) \
1078 if (index >= limit - val) return limit; \
1079 index += val;
1080
1081 // Skip an annotation. Return >=limit if there is any problem.
1082 static int skip_annotation(const u1* buffer, int limit, int index) {
1083 assert(buffer != NULL, "invariant");
1084 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1085 // value := switch (tag:u1) { ... }
1086 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1087 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1088 while (--nmem >= 0 && index < limit) {
1089 SAFE_ADD(index, limit, 2); // skip member
1090 index = skip_annotation_value(buffer, limit, index);
1091 }
1092 return index;
1093 }
1094
1095 // Skip an annotation value. Return >=limit if there is any problem.
1096 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1097 assert(buffer != NULL, "invariant");
1098
1099 // value := switch (tag:u1) {
1100 // case B, C, I, S, Z, D, F, J, c: con:u2;
1101 // case e: e_class:u2 e_name:u2;
1102 // case s: s_con:u2;
1103 // case [: do(nval:u2) {value};
1104 // case @: annotation;
1105 // case s: s_con:u2;
1106 // }
1107 SAFE_ADD(index, limit, 1); // read tag
1108 const u1 tag = buffer[index - 1];
1109 switch (tag) {
1110 case 'B':
1111 case 'C':
1112 case 'I':
1113 case 'S':
1114 case 'Z':
1115 case 'D':
1116 case 'F':
1117 case 'J':
1118 case 'c':
1119 case 's':
1120 SAFE_ADD(index, limit, 2); // skip con or s_con
1121 break;
1122 case 'e':
1123 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1124 break;
1125 case '[':
1126 {
1127 SAFE_ADD(index, limit, 2); // read nval
1128 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1129 while (--nval >= 0 && index < limit) {
1130 index = skip_annotation_value(buffer, limit, index);
1131 }
1132 }
1133 break;
1134 case '@':
1135 index = skip_annotation(buffer, limit, index);
1136 break;
1137 default:
1138 return limit; // bad tag byte
1139 }
1140 return index;
1141 }
1142
1143 // Sift through annotations, looking for those significant to the VM:
1144 static void parse_annotations(const ConstantPool* const cp,
1145 const u1* buffer, int limit,
1146 AnnotationCollector* coll,
1147 ClassLoaderData* loader_data,
1148 TRAPS) {
1149
1150 assert(cp != NULL, "invariant");
1151 assert(buffer != NULL, "invariant");
1152 assert(coll != NULL, "invariant");
1153 assert(loader_data != NULL, "invariant");
1154
1155 // annotations := do(nann:u2) {annotation}
1156 int index = 2; // read nann
1157 if (index >= limit) return;
1158 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1159 enum { // initial annotation layout
1160 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1161 count_off = 2, // u2 such as 1 (one value)
1162 member_off = 4, // utf8 such as 'value'
1163 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1164 e_tag_val = 'e',
1165 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1166 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1167 e_size = 11, // end of 'e' annotation
1168 c_tag_val = 'c', // payload is type
1169 c_con_off = 7, // utf8 payload, such as 'I'
1170 c_size = 9, // end of 'c' annotation
1171 s_tag_val = 's', // payload is String
1172 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1173 s_size = 9,
1174 min_size = 6 // smallest possible size (zero members)
1175 };
1176 // Cannot add min_size to index in case of overflow MAX_INT
1177 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1178 int index0 = index;
1179 index = skip_annotation(buffer, limit, index);
1180 const u1* const abase = buffer + index0;
1181 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1182 const int count = Bytes::get_Java_u2((address)abase + count_off);
1183 const Symbol* const aname = check_symbol_at(cp, atype);
1184 if (aname == NULL) break; // invalid annotation name
1185 const Symbol* member = NULL;
1186 if (count >= 1) {
1187 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1188 member = check_symbol_at(cp, member_index);
1189 if (member == NULL) break; // invalid member name
1190 }
1191
1192 // Here is where parsing particular annotations will take place.
1193 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1194 if (AnnotationCollector::_unknown == id) continue;
1195 coll->set_annotation(id);
1196
1197 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1198 // @Contended can optionally specify the contention group.
1199 //
1200 // Contended group defines the equivalence class over the fields:
1201 // the fields within the same contended group are not treated distinct.
1202 // The only exception is default group, which does not incur the
1203 // equivalence. Naturally, contention group for classes is meaningless.
1204 //
1205 // While the contention group is specified as String, annotation
1206 // values are already interned, and we might as well use the constant
1207 // pool index as the group tag.
1208 //
1209 u2 group_index = 0; // default contended group
1210 if (count == 1
1211 && s_size == (index - index0) // match size
1212 && s_tag_val == *(abase + tag_off)
1213 && member == vmSymbols::value_name()) {
1214 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1215 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1216 group_index = 0; // default contended group
1217 }
1218 }
1219 coll->set_contended_group(group_index);
1220 }
1221 }
1222 }
1223
1224
1225 // Parse attributes for a field.
1226 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1227 u2 attributes_count,
1228 bool is_static, u2 signature_index,
1229 u2* const constantvalue_index_addr,
1230 bool* const is_synthetic_addr,
1231 u2* const generic_signature_index_addr,
1232 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1233 TRAPS) {
1234 assert(cfs != NULL, "invariant");
1235 assert(constantvalue_index_addr != NULL, "invariant");
1236 assert(is_synthetic_addr != NULL, "invariant");
1237 assert(generic_signature_index_addr != NULL, "invariant");
1238 assert(parsed_annotations != NULL, "invariant");
1239 assert(attributes_count > 0, "attributes_count should be greater than 0");
1240
1241 u2 constantvalue_index = 0;
1242 u2 generic_signature_index = 0;
1243 bool is_synthetic = false;
1244 const u1* runtime_visible_annotations = NULL;
1245 int runtime_visible_annotations_length = 0;
1246 const u1* runtime_invisible_annotations = NULL;
1247 int runtime_invisible_annotations_length = 0;
1248 const u1* runtime_visible_type_annotations = NULL;
1249 int runtime_visible_type_annotations_length = 0;
1250 const u1* runtime_invisible_type_annotations = NULL;
1251 int runtime_invisible_type_annotations_length = 0;
1252 bool runtime_invisible_annotations_exists = false;
1253 bool runtime_invisible_type_annotations_exists = false;
1254 const ConstantPool* const cp = _cp;
1255
1256 while (attributes_count--) {
1257 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1258 const u2 attribute_name_index = cfs->get_u2_fast();
1259 const u4 attribute_length = cfs->get_u4_fast();
1260 check_property(valid_symbol_at(attribute_name_index),
1261 "Invalid field attribute index %u in class file %s",
1262 attribute_name_index,
1263 CHECK);
1264
1265 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1266 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1267 // ignore if non-static
1268 if (constantvalue_index != 0) {
1269 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1270 }
1271 check_property(
1272 attribute_length == 2,
1273 "Invalid ConstantValue field attribute length %u in class file %s",
1274 attribute_length, CHECK);
1275
1276 constantvalue_index = cfs->get_u2(CHECK);
1277 if (_need_verify) {
1278 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1279 }
1280 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1281 if (attribute_length != 0) {
1282 classfile_parse_error(
1283 "Invalid Synthetic field attribute length %u in class file %s",
1284 attribute_length, CHECK);
1285 }
1286 is_synthetic = true;
1287 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1288 if (attribute_length != 0) {
1289 classfile_parse_error(
1290 "Invalid Deprecated field attribute length %u in class file %s",
1291 attribute_length, CHECK);
1292 }
1293 } else if (_major_version >= JAVA_1_5_VERSION) {
1294 if (attribute_name == vmSymbols::tag_signature()) {
1295 if (generic_signature_index != 0) {
1296 classfile_parse_error(
1297 "Multiple Signature attributes for field in class file %s", CHECK);
1298 }
1299 if (attribute_length != 2) {
1300 classfile_parse_error(
1301 "Wrong size %u for field's Signature attribute in class file %s",
1302 attribute_length, CHECK);
1303 }
1304 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1305 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1306 if (runtime_visible_annotations != NULL) {
1307 classfile_parse_error(
1308 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1309 }
1310 runtime_visible_annotations_length = attribute_length;
1311 runtime_visible_annotations = cfs->get_u1_buffer();
1312 assert(runtime_visible_annotations != NULL, "null visible annotations");
1313 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1314 parse_annotations(cp,
1315 runtime_visible_annotations,
1316 runtime_visible_annotations_length,
1317 parsed_annotations,
1318 _loader_data,
1319 CHECK);
1320 cfs->skip_u1_fast(runtime_visible_annotations_length);
1321 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1322 if (runtime_invisible_annotations_exists) {
1323 classfile_parse_error(
1324 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1325 }
1326 runtime_invisible_annotations_exists = true;
1327 if (PreserveAllAnnotations) {
1328 runtime_invisible_annotations_length = attribute_length;
1329 runtime_invisible_annotations = cfs->get_u1_buffer();
1330 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1331 }
1332 cfs->skip_u1(attribute_length, CHECK);
1333 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1334 if (runtime_visible_type_annotations != NULL) {
1335 classfile_parse_error(
1336 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1337 }
1338 runtime_visible_type_annotations_length = attribute_length;
1339 runtime_visible_type_annotations = cfs->get_u1_buffer();
1340 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1341 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1342 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1343 if (runtime_invisible_type_annotations_exists) {
1344 classfile_parse_error(
1345 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1346 } else {
1347 runtime_invisible_type_annotations_exists = true;
1348 }
1349 if (PreserveAllAnnotations) {
1350 runtime_invisible_type_annotations_length = attribute_length;
1351 runtime_invisible_type_annotations = cfs->get_u1_buffer();
1352 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1353 }
1354 cfs->skip_u1(attribute_length, CHECK);
1355 } else {
1356 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1357 }
1358 } else {
1359 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1360 }
1361 }
1362
1363 *constantvalue_index_addr = constantvalue_index;
1364 *is_synthetic_addr = is_synthetic;
1365 *generic_signature_index_addr = generic_signature_index;
1366 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1367 runtime_visible_annotations_length,
1368 runtime_invisible_annotations,
1369 runtime_invisible_annotations_length,
1370 CHECK);
1371 parsed_annotations->set_field_annotations(a);
1372 a = assemble_annotations(runtime_visible_type_annotations,
1373 runtime_visible_type_annotations_length,
1374 runtime_invisible_type_annotations,
1375 runtime_invisible_type_annotations_length,
1376 CHECK);
1377 parsed_annotations->set_field_type_annotations(a);
1378 return;
1379 }
1380
1381
1382 // Field allocation types. Used for computing field offsets.
1383
1384 enum FieldAllocationType {
1385 STATIC_OOP, // Oops
1386 STATIC_BYTE, // Boolean, Byte, char
1387 STATIC_SHORT, // shorts
1388 STATIC_WORD, // ints
1389 STATIC_DOUBLE, // aligned long or double
1390 STATIC_VALUETYPE, // Value types
1391 NONSTATIC_OOP,
1392 NONSTATIC_BYTE,
1393 NONSTATIC_SHORT,
1394 NONSTATIC_WORD,
1395 NONSTATIC_DOUBLE,
1396 NONSTATIC_VALUETYPE,
1397 MAX_FIELD_ALLOCATION_TYPE,
1398 BAD_ALLOCATION_TYPE = -1
1399 };
1400
1401 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1402 BAD_ALLOCATION_TYPE, // 0
1403 BAD_ALLOCATION_TYPE, // 1
1404 BAD_ALLOCATION_TYPE, // 2
1405 BAD_ALLOCATION_TYPE, // 3
1406 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1407 NONSTATIC_SHORT, // T_CHAR = 5,
1408 NONSTATIC_WORD, // T_FLOAT = 6,
1409 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1410 NONSTATIC_BYTE, // T_BYTE = 8,
1411 NONSTATIC_SHORT, // T_SHORT = 9,
1412 NONSTATIC_WORD, // T_INT = 10,
1413 NONSTATIC_DOUBLE, // T_LONG = 11,
1414 NONSTATIC_OOP, // T_OBJECT = 12,
1415 NONSTATIC_OOP, // T_ARRAY = 13,
1416 NONSTATIC_VALUETYPE, // T_VALUETYPE = 14,
1417 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1418 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1419 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1420 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1421 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1422 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20,
1423 BAD_ALLOCATION_TYPE, // 0
1424 BAD_ALLOCATION_TYPE, // 1
1425 BAD_ALLOCATION_TYPE, // 2
1426 BAD_ALLOCATION_TYPE, // 3
1427 STATIC_BYTE , // T_BOOLEAN = 4,
1428 STATIC_SHORT, // T_CHAR = 5,
1429 STATIC_WORD, // T_FLOAT = 6,
1430 STATIC_DOUBLE, // T_DOUBLE = 7,
1431 STATIC_BYTE, // T_BYTE = 8,
1432 STATIC_SHORT, // T_SHORT = 9,
1433 STATIC_WORD, // T_INT = 10,
1434 STATIC_DOUBLE, // T_LONG = 11,
1435 STATIC_OOP, // T_OBJECT = 12,
1436 STATIC_OOP, // T_ARRAY = 13,
1437 STATIC_VALUETYPE, // T_VALUETYPE = 14,
1438 BAD_ALLOCATION_TYPE, // T_VOID = 15,
1439 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16,
1440 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17,
1441 BAD_ALLOCATION_TYPE, // T_METADATA = 18,
1442 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1443 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20,
1444 };
1445
1446 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1447 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1448 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1449 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1450 return result;
1451 }
1452
1453 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1454 public:
1455 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1456
1457 FieldAllocationCount() {
1458 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1459 count[i] = 0;
1460 }
1461 }
1462
1463 FieldAllocationType update(bool is_static, BasicType type) {
1464 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1465 if (atype != BAD_ALLOCATION_TYPE) {
1466 // Make sure there is no overflow with injected fields.
1467 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1468 count[atype]++;
1469 }
1470 return atype;
1471 }
1472
1473 // Attempt to redistribute NONSTATIC_VALUETYPE alloc type
1474 FieldAllocationType redistribute_value(bool oops, int value_size) {
1475 FieldAllocationType atype = NONSTATIC_VALUETYPE;
1476 switch (value_size) {
1477 case 1:
1478 atype = NONSTATIC_BYTE;
1479 break;
1480 case 2:
1481 atype = NONSTATIC_SHORT;
1482 break;
1483 case 4:
1484 atype = (oops) ? NONSTATIC_OOP : NONSTATIC_WORD;
1485 break;
1486 default:
1487 assert(is_size_aligned(value_size, BytesPerLong), "Unaligned value %d", value_size);
1488 return atype;
1489 }
1490 count[atype]++;
1491 count[NONSTATIC_VALUETYPE]--; // Leave only large variable sized behind
1492 return atype;
1493 }
1494 };
1495
1496 // Side-effects: populates the _fields, _fields_annotations,
1497 // _fields_type_annotations fields
1498 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1499 bool is_interface,
1500 FieldAllocationCount* const fac,
1501 ConstantPool* cp,
1502 const int cp_size,
1503 u2* const java_fields_count_ptr,
1504 TRAPS) {
1505
1506 assert(cfs != NULL, "invariant");
1507 assert(fac != NULL, "invariant");
1508 assert(cp != NULL, "invariant");
1509 assert(java_fields_count_ptr != NULL, "invariant");
1510
1511 assert(NULL == _fields, "invariant");
1512 assert(NULL == _fields_annotations, "invariant");
1513 assert(NULL == _fields_type_annotations, "invariant");
1514
1515 cfs->guarantee_more(2, CHECK); // length
1516 const u2 length = cfs->get_u2_fast();
1517 *java_fields_count_ptr = length;
1518
1519 int num_injected = 0;
1520 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1521 &num_injected);
1522 const int total_fields = length + num_injected;
1523
1524 // The field array starts with tuples of shorts
1525 // [access, name index, sig index, initial value index, byte offset].
1526 // A generic signature slot only exists for field with generic
1527 // signature attribute. And the access flag is set with
1528 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1529 // signature slots are at the end of the field array and after all
1530 // other fields data.
1531 //
1532 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1533 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1534 // ...
1535 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1536 // [generic signature index]
1537 // [generic signature index]
1538 // ...
1539 //
1540 // Allocate a temporary resource array for field data. For each field,
1541 // a slot is reserved in the temporary array for the generic signature
1542 // index. After parsing all fields, the data are copied to a permanent
1543 // array and any unused slots will be discarded.
1544 ResourceMark rm(THREAD);
1545 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1546 u2,
1547 total_fields * (FieldInfo::field_slots + 1));
1548
1549 // The generic signature slots start after all other fields' data.
1550 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1551 int num_generic_signature = 0;
1552 for (int n = 0; n < length; n++) {
1553 // access_flags, name_index, descriptor_index, attributes_count
1554 cfs->guarantee_more(8, CHECK);
1555
1556 AccessFlags access_flags;
1557 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1558 verify_legal_field_modifiers(flags, is_interface, CHECK);
1559 access_flags.set_flags(flags);
1560
1561 const u2 name_index = cfs->get_u2_fast();
1562 check_property(valid_symbol_at(name_index),
1563 "Invalid constant pool index %u for field name in class file %s",
1564 name_index, CHECK);
1565 const Symbol* const name = cp->symbol_at(name_index);
1566 verify_legal_field_name(name, CHECK);
1567
1568 const u2 signature_index = cfs->get_u2_fast();
1569 check_property(valid_symbol_at(signature_index),
1570 "Invalid constant pool index %u for field signature in class file %s",
1571 signature_index, CHECK);
1572 const Symbol* const sig = cp->symbol_at(signature_index);
1573 verify_legal_field_signature(name, sig, CHECK);
1574 if (sig->starts_with("Q")) {
1575 _has_value_fields = true;
1576 }
1577
1578 u2 constantvalue_index = 0;
1579 bool is_synthetic = false;
1580 u2 generic_signature_index = 0;
1581 const bool is_static = access_flags.is_static();
1582 FieldAnnotationCollector parsed_annotations(_loader_data);
1583
1584 const u2 attributes_count = cfs->get_u2_fast();
1585 if (attributes_count > 0) {
1586 parse_field_attributes(cfs,
1587 attributes_count,
1588 is_static,
1589 signature_index,
1590 &constantvalue_index,
1591 &is_synthetic,
1592 &generic_signature_index,
1593 &parsed_annotations,
1594 CHECK);
1595
1596 if (parsed_annotations.field_annotations() != NULL) {
1597 if (_fields_annotations == NULL) {
1598 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1599 _loader_data, length, NULL,
1600 CHECK);
1601 }
1602 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1603 parsed_annotations.set_field_annotations(NULL);
1604 }
1605 if (parsed_annotations.field_type_annotations() != NULL) {
1606 if (_fields_type_annotations == NULL) {
1607 _fields_type_annotations =
1608 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1609 length,
1610 NULL,
1611 CHECK);
1612 }
1613 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1614 parsed_annotations.set_field_type_annotations(NULL);
1615 }
1616
1617 if (is_synthetic) {
1618 access_flags.set_is_synthetic();
1619 }
1620 if (generic_signature_index != 0) {
1621 access_flags.set_field_has_generic_signature();
1622 fa[generic_signature_slot] = generic_signature_index;
1623 generic_signature_slot ++;
1624 num_generic_signature ++;
1625 }
1626 }
1627
1628 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1629 field->initialize(access_flags.as_short(),
1630 name_index,
1631 signature_index,
1632 constantvalue_index);
1633 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1634
1635 // Remember how many oops we encountered and compute allocation type
1636 const FieldAllocationType atype = fac->update(is_static, type);
1637 field->set_allocation_type(atype);
1638
1639 // After field is initialized with type, we can augment it with aux info
1640 if (parsed_annotations.has_any_annotations())
1641 parsed_annotations.apply_to(field);
1642 }
1643
1644 int index = length;
1645 if (num_injected != 0) {
1646 for (int n = 0; n < num_injected; n++) {
1647 // Check for duplicates
1648 if (injected[n].may_be_java) {
1649 const Symbol* const name = injected[n].name();
1650 const Symbol* const signature = injected[n].signature();
1651 bool duplicate = false;
1652 for (int i = 0; i < length; i++) {
1653 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1654 if (name == cp->symbol_at(f->name_index()) &&
1655 signature == cp->symbol_at(f->signature_index())) {
1656 // Symbol is desclared in Java so skip this one
1657 duplicate = true;
1658 break;
1659 }
1660 }
1661 if (duplicate) {
1662 // These will be removed from the field array at the end
1663 continue;
1664 }
1665 }
1666
1667 // Injected field
1668 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1669 field->initialize(JVM_ACC_FIELD_INTERNAL,
1670 injected[n].name_index,
1671 injected[n].signature_index,
1672 0);
1673
1674 const BasicType type = FieldType::basic_type(injected[n].signature());
1675
1676 // Remember how many oops we encountered and compute allocation type
1677 const FieldAllocationType atype = fac->update(false, type);
1678 field->set_allocation_type(atype);
1679 index++;
1680 }
1681 }
1682
1683 assert(NULL == _fields, "invariant");
1684
1685 _fields =
1686 MetadataFactory::new_array<u2>(_loader_data,
1687 index * FieldInfo::field_slots + num_generic_signature,
1688 CHECK);
1689 // Sometimes injected fields already exist in the Java source so
1690 // the fields array could be too long. In that case the
1691 // fields array is trimed. Also unused slots that were reserved
1692 // for generic signature indexes are discarded.
1693 {
1694 int i = 0;
1695 for (; i < index * FieldInfo::field_slots; i++) {
1696 _fields->at_put(i, fa[i]);
1697 }
1698 for (int j = total_fields * FieldInfo::field_slots;
1699 j < generic_signature_slot; j++) {
1700 _fields->at_put(i++, fa[j]);
1701 }
1702 assert(_fields->length() == i, "");
1703 }
1704
1705 if (_need_verify && length > 1) {
1706 // Check duplicated fields
1707 ResourceMark rm(THREAD);
1708 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1709 THREAD, NameSigHash*, HASH_ROW_SIZE);
1710 initialize_hashtable(names_and_sigs);
1711 bool dup = false;
1712 const Symbol* name = NULL;
1713 const Symbol* sig = NULL;
1714 {
1715 debug_only(NoSafepointVerifier nsv;)
1716 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1717 name = fs.name();
1718 sig = fs.signature();
1719 // If no duplicates, add name/signature in hashtable names_and_sigs.
1720 if (!put_after_lookup(name, sig, names_and_sigs)) {
1721 dup = true;
1722 break;
1723 }
1724 }
1725 }
1726 if (dup) {
1727 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1728 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1729 }
1730 }
1731 }
1732
1733
1734 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) {
1735 while (length-- > 0) {
1736 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1737 }
1738 }
1739
1740 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1741 u4 code_length,
1742 u4 exception_table_length,
1743 TRAPS) {
1744 assert(cfs != NULL, "invariant");
1745
1746 const u2* const exception_table_start = cfs->get_u2_buffer();
1747 assert(exception_table_start != NULL, "null exception table");
1748
1749 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1750 // end_pc,
1751 // handler_pc,
1752 // catch_type_index
1753
1754 // Will check legal target after parsing code array in verifier.
1755 if (_need_verify) {
1756 for (unsigned int i = 0; i < exception_table_length; i++) {
1757 const u2 start_pc = cfs->get_u2_fast();
1758 const u2 end_pc = cfs->get_u2_fast();
1759 const u2 handler_pc = cfs->get_u2_fast();
1760 const u2 catch_type_index = cfs->get_u2_fast();
1761 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1762 "Illegal exception table range in class file %s",
1763 CHECK_NULL);
1764 guarantee_property(handler_pc < code_length,
1765 "Illegal exception table handler in class file %s",
1766 CHECK_NULL);
1767 if (catch_type_index != 0) {
1768 guarantee_property(valid_klass_reference_at(catch_type_index),
1769 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1770 }
1771 }
1772 } else {
1773 cfs->skip_u2_fast(exception_table_length * 4);
1774 }
1775 return exception_table_start;
1776 }
1777
1778 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1779 u4 code_length,
1780 CompressedLineNumberWriteStream**const write_stream,
1781 TRAPS) {
1782
1783 const ClassFileStream* const cfs = _stream;
1784 unsigned int num_entries = cfs->get_u2(CHECK);
1785
1786 // Each entry is a u2 start_pc, and a u2 line_number
1787 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1788
1789 // Verify line number attribute and table length
1790 check_property(
1791 code_attribute_length == sizeof(u2) + length_in_bytes,
1792 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1793
1794 cfs->guarantee_more(length_in_bytes, CHECK);
1795
1796 if ((*write_stream) == NULL) {
1797 if (length_in_bytes > fixed_buffer_size) {
1798 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1799 } else {
1800 (*write_stream) = new CompressedLineNumberWriteStream(
1801 _linenumbertable_buffer, fixed_buffer_size);
1802 }
1803 }
1804
1805 while (num_entries-- > 0) {
1806 const u2 bci = cfs->get_u2_fast(); // start_pc
1807 const u2 line = cfs->get_u2_fast(); // line_number
1808 guarantee_property(bci < code_length,
1809 "Invalid pc in LineNumberTable in class file %s", CHECK);
1810 (*write_stream)->write_pair(bci, line);
1811 }
1812 }
1813
1814
1815 class LVT_Hash : public AllStatic {
1816 public:
1817
1818 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1819 /*
1820 * 3-tuple start_bci/length/slot has to be unique key,
1821 * so the following comparison seems to be redundant:
1822 * && elem->name_cp_index == entry->_elem->name_cp_index
1823 */
1824 return (e0.start_bci == e1.start_bci &&
1825 e0.length == e1.length &&
1826 e0.name_cp_index == e1.name_cp_index &&
1827 e0.slot == e1.slot);
1828 }
1829
1830 static unsigned int hash(LocalVariableTableElement const& e0) {
1831 unsigned int raw_hash = e0.start_bci;
1832
1833 raw_hash = e0.length + raw_hash * 37;
1834 raw_hash = e0.name_cp_index + raw_hash * 37;
1835 raw_hash = e0.slot + raw_hash * 37;
1836
1837 return raw_hash;
1838 }
1839 };
1840
1841
1842 // Class file LocalVariableTable elements.
1843 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1844 public:
1845 u2 start_bci;
1846 u2 length;
1847 u2 name_cp_index;
1848 u2 descriptor_cp_index;
1849 u2 slot;
1850 };
1851
1852 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1853 LocalVariableTableElement* const lvt) {
1854 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1855 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1856 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1857 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1858 lvt->signature_cp_index = 0;
1859 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1860 }
1861
1862 // Function is used to parse both attributes:
1863 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1864 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1865 u4 code_length,
1866 u2 max_locals,
1867 u4 code_attribute_length,
1868 u2* const localvariable_table_length,
1869 bool isLVTT,
1870 TRAPS) {
1871 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1872 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1873 const unsigned int size =
1874 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1875
1876 const ConstantPool* const cp = _cp;
1877
1878 // Verify local variable table attribute has right length
1879 if (_need_verify) {
1880 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1881 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1882 }
1883
1884 const u2* const localvariable_table_start = cfs->get_u2_buffer();
1885 assert(localvariable_table_start != NULL, "null local variable table");
1886 if (!_need_verify) {
1887 cfs->skip_u2_fast(size);
1888 } else {
1889 cfs->guarantee_more(size * 2, CHECK_NULL);
1890 for(int i = 0; i < (*localvariable_table_length); i++) {
1891 const u2 start_pc = cfs->get_u2_fast();
1892 const u2 length = cfs->get_u2_fast();
1893 const u2 name_index = cfs->get_u2_fast();
1894 const u2 descriptor_index = cfs->get_u2_fast();
1895 const u2 index = cfs->get_u2_fast();
1896 // Assign to a u4 to avoid overflow
1897 const u4 end_pc = (u4)start_pc + (u4)length;
1898
1899 if (start_pc >= code_length) {
1900 classfile_parse_error(
1901 "Invalid start_pc %u in %s in class file %s",
1902 start_pc, tbl_name, CHECK_NULL);
1903 }
1904 if (end_pc > code_length) {
1905 classfile_parse_error(
1906 "Invalid length %u in %s in class file %s",
1907 length, tbl_name, CHECK_NULL);
1908 }
1909 const int cp_size = cp->length();
1910 guarantee_property(valid_symbol_at(name_index),
1911 "Name index %u in %s has bad constant type in class file %s",
1912 name_index, tbl_name, CHECK_NULL);
1913 guarantee_property(valid_symbol_at(descriptor_index),
1914 "Signature index %u in %s has bad constant type in class file %s",
1915 descriptor_index, tbl_name, CHECK_NULL);
1916
1917 const Symbol* const name = cp->symbol_at(name_index);
1918 const Symbol* const sig = cp->symbol_at(descriptor_index);
1919 verify_legal_field_name(name, CHECK_NULL);
1920 u2 extra_slot = 0;
1921 if (!isLVTT) {
1922 verify_legal_field_signature(name, sig, CHECK_NULL);
1923
1924 // 4894874: check special cases for double and long local variables
1925 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1926 sig == vmSymbols::type_signature(T_LONG)) {
1927 extra_slot = 1;
1928 }
1929 }
1930 guarantee_property((index + extra_slot) < max_locals,
1931 "Invalid index %u in %s in class file %s",
1932 index, tbl_name, CHECK_NULL);
1933 }
1934 }
1935 return localvariable_table_start;
1936 }
1937
1938
1939 void ClassFileParser::parse_type_array(u2 array_length,
1940 u4 code_length,
1941 u4* const u1_index,
1942 u4* const u2_index,
1943 u1* const u1_array,
1944 u2* const u2_array,
1945 TRAPS) {
1946 const ClassFileStream* const cfs = _stream;
1947 u2 index = 0; // index in the array with long/double occupying two slots
1948 u4 i1 = *u1_index;
1949 u4 i2 = *u2_index + 1;
1950 for(int i = 0; i < array_length; i++) {
1951 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1952 index++;
1953 if (tag == ITEM_Long || tag == ITEM_Double) {
1954 index++;
1955 } else if (tag == ITEM_Object) {
1956 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1957 guarantee_property(valid_klass_reference_at(class_index),
1958 "Bad class index %u in StackMap in class file %s",
1959 class_index, CHECK);
1960 } else if (tag == ITEM_Uninitialized) {
1961 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1962 guarantee_property(
1963 offset < code_length,
1964 "Bad uninitialized type offset %u in StackMap in class file %s",
1965 offset, CHECK);
1966 } else {
1967 guarantee_property(
1968 tag <= (u1)ITEM_Uninitialized,
1969 "Unknown variable type %u in StackMap in class file %s",
1970 tag, CHECK);
1971 }
1972 }
1973 u2_array[*u2_index] = index;
1974 *u1_index = i1;
1975 *u2_index = i2;
1976 }
1977
1978 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1979 u4 code_attribute_length,
1980 bool need_verify,
1981 TRAPS) {
1982 assert(cfs != NULL, "invariant");
1983
1984 if (0 == code_attribute_length) {
1985 return NULL;
1986 }
1987
1988 const u1* const stackmap_table_start = cfs->get_u1_buffer();
1989 assert(stackmap_table_start != NULL, "null stackmap table");
1990
1991 // check code_attribute_length first
1992 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1993
1994 if (!need_verify && !DumpSharedSpaces) {
1995 return NULL;
1996 }
1997 return stackmap_table_start;
1998 }
1999
2000 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2001 u2* const checked_exceptions_length,
2002 u4 method_attribute_length,
2003 TRAPS) {
2004 assert(cfs != NULL, "invariant");
2005 assert(checked_exceptions_length != NULL, "invariant");
2006
2007 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2008 *checked_exceptions_length = cfs->get_u2_fast();
2009 const unsigned int size =
2010 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2011 const u2* const checked_exceptions_start = cfs->get_u2_buffer();
2012 assert(checked_exceptions_start != NULL, "null checked exceptions");
2013 if (!_need_verify) {
2014 cfs->skip_u2_fast(size);
2015 } else {
2016 // Verify each value in the checked exception table
2017 u2 checked_exception;
2018 const u2 len = *checked_exceptions_length;
2019 cfs->guarantee_more(2 * len, CHECK_NULL);
2020 for (int i = 0; i < len; i++) {
2021 checked_exception = cfs->get_u2_fast();
2022 check_property(
2023 valid_klass_reference_at(checked_exception),
2024 "Exception name has bad type at constant pool %u in class file %s",
2025 checked_exception, CHECK_NULL);
2026 }
2027 }
2028 // check exceptions attribute length
2029 if (_need_verify) {
2030 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2031 sizeof(u2) * size),
2032 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2033 }
2034 return checked_exceptions_start;
2035 }
2036
2037 void ClassFileParser::throwIllegalSignature(const char* type,
2038 const Symbol* name,
2039 const Symbol* sig,
2040 TRAPS) const {
2041 assert(name != NULL, "invariant");
2042 assert(sig != NULL, "invariant");
2043
2044 ResourceMark rm(THREAD);
2045 Exceptions::fthrow(THREAD_AND_LOCATION,
2046 vmSymbols::java_lang_ClassFormatError(),
2047 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2048 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2049 }
2050
2051 AnnotationCollector::ID
2052 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2053 const Symbol* name) {
2054 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2055 // Privileged code can use all annotations. Other code silently drops some.
2056 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2057 loader_data->is_platform_class_loader_data() ||
2058 loader_data->is_anonymous();
2059 switch (sid) {
2060 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2061 if (_location != _in_method) break; // only allow for methods
2062 if (!privileged) break; // only allow in privileged code
2063 return _method_CallerSensitive;
2064 }
2065 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2066 if (_location != _in_method) break; // only allow for methods
2067 if (!privileged) break; // only allow in privileged code
2068 return _method_ForceInline;
2069 }
2070 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2071 if (_location != _in_method) break; // only allow for methods
2072 if (!privileged) break; // only allow in privileged code
2073 return _method_DontInline;
2074 }
2075 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2076 if (_location != _in_method) break; // only allow for methods
2077 if (!privileged) break; // only allow in privileged code
2078 return _method_InjectedProfile;
2079 }
2080 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2081 if (_location != _in_method) break; // only allow for methods
2082 if (!privileged) break; // only allow in privileged code
2083 return _method_LambdaForm_Compiled;
2084 }
2085 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
2086 if (_location != _in_method) break; // only allow for methods
2087 if (!privileged) break; // only allow in privileged code
2088 return _method_LambdaForm_Hidden;
2089 }
2090 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2091 if (_location != _in_method) break; // only allow for methods
2092 if (!privileged) break; // only allow in privileged code
2093 return _method_HotSpotIntrinsicCandidate;
2094 }
2095 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2096 if (_location != _in_field) break; // only allow for fields
2097 if (!privileged) break; // only allow in privileged code
2098 return _field_Stable;
2099 }
2100 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2101 if (_location != _in_field && _location != _in_class) {
2102 break; // only allow for fields and classes
2103 }
2104 if (!EnableContended || (RestrictContended && !privileged)) {
2105 break; // honor privileges
2106 }
2107 return _jdk_internal_vm_annotation_Contended;
2108 }
2109 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2110 if (_location != _in_method) break; // only allow for methods
2111 if (RestrictReservedStack && !privileged) break; // honor privileges
2112 return _jdk_internal_vm_annotation_ReservedStackAccess;
2113 }
2114 case vmSymbols::VM_SYMBOL_ENUM_NAME(jvm_internal_value_DeriveValueType_signature) : {
2115 if (_location != _in_class) {
2116 break;
2117 }
2118 return _jvm_internal_value_DeriveValueType;
2119 }
2120 default: {
2121 break;
2122 }
2123 }
2124 return AnnotationCollector::_unknown;
2125 }
2126
2127 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2128 if (is_contended())
2129 f->set_contended_group(contended_group());
2130 if (is_stable())
2131 f->set_stable(true);
2132 }
2133
2134 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2135 // If there's an error deallocate metadata for field annotations
2136 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2137 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2138 }
2139
2140 void MethodAnnotationCollector::apply_to(methodHandle m) {
2141 if (has_annotation(_method_CallerSensitive))
2142 m->set_caller_sensitive(true);
2143 if (has_annotation(_method_ForceInline))
2144 m->set_force_inline(true);
2145 if (has_annotation(_method_DontInline))
2146 m->set_dont_inline(true);
2147 if (has_annotation(_method_InjectedProfile))
2148 m->set_has_injected_profile(true);
2149 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2150 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2151 if (has_annotation(_method_LambdaForm_Hidden))
2152 m->set_hidden(true);
2153 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2154 m->set_intrinsic_candidate(true);
2155 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2156 m->set_has_reserved_stack_access(true);
2157 }
2158
2159 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2160 assert(ik != NULL, "invariant");
2161 ik->set_is_contended(is_contended());
2162 }
2163
2164 #define MAX_ARGS_SIZE 255
2165 #define MAX_CODE_SIZE 65535
2166 #define INITIAL_MAX_LVT_NUMBER 256
2167
2168 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2169 *
2170 * Rules for LVT's and LVTT's are:
2171 * - There can be any number of LVT's and LVTT's.
2172 * - If there are n LVT's, it is the same as if there was just
2173 * one LVT containing all the entries from the n LVT's.
2174 * - There may be no more than one LVT entry per local variable.
2175 * Two LVT entries are 'equal' if these fields are the same:
2176 * start_pc, length, name, slot
2177 * - There may be no more than one LVTT entry per each LVT entry.
2178 * Each LVTT entry has to match some LVT entry.
2179 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2180 */
2181 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2182 int lvt_cnt,
2183 u2* const localvariable_table_length,
2184 const u2**const localvariable_table_start,
2185 int lvtt_cnt,
2186 u2* const localvariable_type_table_length,
2187 const u2**const localvariable_type_table_start,
2188 TRAPS) {
2189
2190 ResourceMark rm(THREAD);
2191
2192 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2193 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2194
2195 LVT_HashTable* const table = new LVT_HashTable();
2196
2197 // To fill LocalVariableTable in
2198 const Classfile_LVT_Element* cf_lvt;
2199 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2200
2201 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2202 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2203 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2204 copy_lvt_element(&cf_lvt[idx], lvt);
2205 // If no duplicates, add LVT elem in hashtable.
2206 if (table->put(*lvt, lvt) == false
2207 && _need_verify
2208 && _major_version >= JAVA_1_5_VERSION) {
2209 classfile_parse_error("Duplicated LocalVariableTable attribute "
2210 "entry for '%s' in class file %s",
2211 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2212 CHECK);
2213 }
2214 }
2215 }
2216
2217 // To merge LocalVariableTable and LocalVariableTypeTable
2218 const Classfile_LVT_Element* cf_lvtt;
2219 LocalVariableTableElement lvtt_elem;
2220
2221 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2222 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2223 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2224 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2225 LocalVariableTableElement** entry = table->get(lvtt_elem);
2226 if (entry == NULL) {
2227 if (_need_verify) {
2228 classfile_parse_error("LVTT entry for '%s' in class file %s "
2229 "does not match any LVT entry",
2230 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2231 CHECK);
2232 }
2233 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2234 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2235 "entry for '%s' in class file %s",
2236 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2237 CHECK);
2238 } else {
2239 // to add generic signatures into LocalVariableTable
2240 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2241 }
2242 }
2243 }
2244 }
2245
2246
2247 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2248 const u1* runtime_visible_annotations,
2249 int runtime_visible_annotations_length,
2250 const u1* runtime_invisible_annotations,
2251 int runtime_invisible_annotations_length,
2252 const u1* runtime_visible_parameter_annotations,
2253 int runtime_visible_parameter_annotations_length,
2254 const u1* runtime_invisible_parameter_annotations,
2255 int runtime_invisible_parameter_annotations_length,
2256 const u1* runtime_visible_type_annotations,
2257 int runtime_visible_type_annotations_length,
2258 const u1* runtime_invisible_type_annotations,
2259 int runtime_invisible_type_annotations_length,
2260 const u1* annotation_default,
2261 int annotation_default_length,
2262 TRAPS) {
2263
2264 AnnotationArray* a;
2265
2266 if (runtime_visible_annotations_length +
2267 runtime_invisible_annotations_length > 0) {
2268 a = assemble_annotations(runtime_visible_annotations,
2269 runtime_visible_annotations_length,
2270 runtime_invisible_annotations,
2271 runtime_invisible_annotations_length,
2272 CHECK);
2273 cm->set_method_annotations(a);
2274 }
2275
2276 if (runtime_visible_parameter_annotations_length +
2277 runtime_invisible_parameter_annotations_length > 0) {
2278 a = assemble_annotations(runtime_visible_parameter_annotations,
2279 runtime_visible_parameter_annotations_length,
2280 runtime_invisible_parameter_annotations,
2281 runtime_invisible_parameter_annotations_length,
2282 CHECK);
2283 cm->set_parameter_annotations(a);
2284 }
2285
2286 if (annotation_default_length > 0) {
2287 a = assemble_annotations(annotation_default,
2288 annotation_default_length,
2289 NULL,
2290 0,
2291 CHECK);
2292 cm->set_default_annotations(a);
2293 }
2294
2295 if (runtime_visible_type_annotations_length +
2296 runtime_invisible_type_annotations_length > 0) {
2297 a = assemble_annotations(runtime_visible_type_annotations,
2298 runtime_visible_type_annotations_length,
2299 runtime_invisible_type_annotations,
2300 runtime_invisible_type_annotations_length,
2301 CHECK);
2302 cm->set_type_annotations(a);
2303 }
2304 }
2305
2306
2307 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2308 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2309 // Method* to save footprint, so we only know the size of the resulting Method* when the
2310 // entire method attribute is parsed.
2311 //
2312 // The promoted_flags parameter is used to pass relevant access_flags
2313 // from the method back up to the containing klass. These flag values
2314 // are added to klass's access_flags.
2315
2316 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2317 bool is_interface,
2318 const ConstantPool* cp,
2319 AccessFlags* const promoted_flags,
2320 TRAPS) {
2321 assert(cfs != NULL, "invariant");
2322 assert(cp != NULL, "invariant");
2323 assert(promoted_flags != NULL, "invariant");
2324
2325 ResourceMark rm(THREAD);
2326 // Parse fixed parts:
2327 // access_flags, name_index, descriptor_index, attributes_count
2328 cfs->guarantee_more(8, CHECK_NULL);
2329
2330 int flags = cfs->get_u2_fast();
2331 const u2 name_index = cfs->get_u2_fast();
2332 const int cp_size = cp->length();
2333 check_property(
2334 valid_symbol_at(name_index),
2335 "Illegal constant pool index %u for method name in class file %s",
2336 name_index, CHECK_NULL);
2337 const Symbol* const name = cp->symbol_at(name_index);
2338 verify_legal_method_name(name, CHECK_NULL);
2339
2340 const u2 signature_index = cfs->get_u2_fast();
2341 guarantee_property(
2342 valid_symbol_at(signature_index),
2343 "Illegal constant pool index %u for method signature in class file %s",
2344 signature_index, CHECK_NULL);
2345 const Symbol* const signature = cp->symbol_at(signature_index);
2346
2347 if (name == vmSymbols::class_initializer_name()) {
2348 // We ignore the other access flags for a valid class initializer.
2349 // (JVM Spec 2nd ed., chapter 4.6)
2350 if (_major_version < 51) { // backward compatibility
2351 flags = JVM_ACC_STATIC;
2352 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2353 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2354 } else {
2355 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2356 }
2357 } else {
2358 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2359 }
2360
2361 if (name == vmSymbols::object_initializer_name() && is_interface) {
2362 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2363 }
2364
2365 int args_size = -1; // only used when _need_verify is true
2366 if (_need_verify) {
2367 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2368 verify_legal_method_signature(name, signature, CHECK_NULL);
2369 if (args_size > MAX_ARGS_SIZE) {
2370 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2371 }
2372 }
2373
2374 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2375
2376 // Default values for code and exceptions attribute elements
2377 u2 max_stack = 0;
2378 u2 max_locals = 0;
2379 u4 code_length = 0;
2380 const u1* code_start = 0;
2381 u2 exception_table_length = 0;
2382 const u2* exception_table_start = NULL;
2383 Array<int>* exception_handlers = Universe::the_empty_int_array();
2384 u2 checked_exceptions_length = 0;
2385 const u2* checked_exceptions_start = NULL;
2386 CompressedLineNumberWriteStream* linenumber_table = NULL;
2387 int linenumber_table_length = 0;
2388 int total_lvt_length = 0;
2389 u2 lvt_cnt = 0;
2390 u2 lvtt_cnt = 0;
2391 bool lvt_allocated = false;
2392 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2393 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2394 u2* localvariable_table_length = NULL;
2395 const u2** localvariable_table_start = NULL;
2396 u2* localvariable_type_table_length = NULL;
2397 const u2** localvariable_type_table_start = NULL;
2398 int method_parameters_length = -1;
2399 const u1* method_parameters_data = NULL;
2400 bool method_parameters_seen = false;
2401 bool parsed_code_attribute = false;
2402 bool parsed_checked_exceptions_attribute = false;
2403 bool parsed_stackmap_attribute = false;
2404 // stackmap attribute - JDK1.5
2405 const u1* stackmap_data = NULL;
2406 int stackmap_data_length = 0;
2407 u2 generic_signature_index = 0;
2408 MethodAnnotationCollector parsed_annotations;
2409 const u1* runtime_visible_annotations = NULL;
2410 int runtime_visible_annotations_length = 0;
2411 const u1* runtime_invisible_annotations = NULL;
2412 int runtime_invisible_annotations_length = 0;
2413 const u1* runtime_visible_parameter_annotations = NULL;
2414 int runtime_visible_parameter_annotations_length = 0;
2415 const u1* runtime_invisible_parameter_annotations = NULL;
2416 int runtime_invisible_parameter_annotations_length = 0;
2417 const u1* runtime_visible_type_annotations = NULL;
2418 int runtime_visible_type_annotations_length = 0;
2419 const u1* runtime_invisible_type_annotations = NULL;
2420 int runtime_invisible_type_annotations_length = 0;
2421 bool runtime_invisible_annotations_exists = false;
2422 bool runtime_invisible_type_annotations_exists = false;
2423 bool runtime_invisible_parameter_annotations_exists = false;
2424 const u1* annotation_default = NULL;
2425 int annotation_default_length = 0;
2426
2427 // Parse code and exceptions attribute
2428 u2 method_attributes_count = cfs->get_u2_fast();
2429 while (method_attributes_count--) {
2430 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2431 const u2 method_attribute_name_index = cfs->get_u2_fast();
2432 const u4 method_attribute_length = cfs->get_u4_fast();
2433 check_property(
2434 valid_symbol_at(method_attribute_name_index),
2435 "Invalid method attribute name index %u in class file %s",
2436 method_attribute_name_index, CHECK_NULL);
2437
2438 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2439 if (method_attribute_name == vmSymbols::tag_code()) {
2440 // Parse Code attribute
2441 if (_need_verify) {
2442 guarantee_property(
2443 !access_flags.is_native() && !access_flags.is_abstract(),
2444 "Code attribute in native or abstract methods in class file %s",
2445 CHECK_NULL);
2446 }
2447 if (parsed_code_attribute) {
2448 classfile_parse_error("Multiple Code attributes in class file %s",
2449 CHECK_NULL);
2450 }
2451 parsed_code_attribute = true;
2452
2453 // Stack size, locals size, and code size
2454 if (_major_version == 45 && _minor_version <= 2) {
2455 cfs->guarantee_more(4, CHECK_NULL);
2456 max_stack = cfs->get_u1_fast();
2457 max_locals = cfs->get_u1_fast();
2458 code_length = cfs->get_u2_fast();
2459 } else {
2460 cfs->guarantee_more(8, CHECK_NULL);
2461 max_stack = cfs->get_u2_fast();
2462 max_locals = cfs->get_u2_fast();
2463 code_length = cfs->get_u4_fast();
2464 }
2465 if (_need_verify) {
2466 guarantee_property(args_size <= max_locals,
2467 "Arguments can't fit into locals in class file %s",
2468 CHECK_NULL);
2469 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2470 "Invalid method Code length %u in class file %s",
2471 code_length, CHECK_NULL);
2472 }
2473 // Code pointer
2474 code_start = cfs->get_u1_buffer();
2475 assert(code_start != NULL, "null code start");
2476 cfs->guarantee_more(code_length, CHECK_NULL);
2477 cfs->skip_u1_fast(code_length);
2478
2479 // Exception handler table
2480 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2481 exception_table_length = cfs->get_u2_fast();
2482 if (exception_table_length > 0) {
2483 exception_table_start = parse_exception_table(cfs,
2484 code_length,
2485 exception_table_length,
2486 CHECK_NULL);
2487 }
2488
2489 // Parse additional attributes in code attribute
2490 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2491 u2 code_attributes_count = cfs->get_u2_fast();
2492
2493 unsigned int calculated_attribute_length = 0;
2494
2495 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2496 calculated_attribute_length =
2497 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2498 } else {
2499 // max_stack, locals and length are smaller in pre-version 45.2 classes
2500 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2501 }
2502 calculated_attribute_length +=
2503 code_length +
2504 sizeof(exception_table_length) +
2505 sizeof(code_attributes_count) +
2506 exception_table_length *
2507 ( sizeof(u2) + // start_pc
2508 sizeof(u2) + // end_pc
2509 sizeof(u2) + // handler_pc
2510 sizeof(u2) ); // catch_type_index
2511
2512 while (code_attributes_count--) {
2513 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2514 const u2 code_attribute_name_index = cfs->get_u2_fast();
2515 const u4 code_attribute_length = cfs->get_u4_fast();
2516 calculated_attribute_length += code_attribute_length +
2517 sizeof(code_attribute_name_index) +
2518 sizeof(code_attribute_length);
2519 check_property(valid_symbol_at(code_attribute_name_index),
2520 "Invalid code attribute name index %u in class file %s",
2521 code_attribute_name_index,
2522 CHECK_NULL);
2523 if (LoadLineNumberTables &&
2524 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2525 // Parse and compress line number table
2526 parse_linenumber_table(code_attribute_length,
2527 code_length,
2528 &linenumber_table,
2529 CHECK_NULL);
2530
2531 } else if (LoadLocalVariableTables &&
2532 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2533 // Parse local variable table
2534 if (!lvt_allocated) {
2535 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2536 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2537 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2538 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2539 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2540 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2541 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2542 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2543 lvt_allocated = true;
2544 }
2545 if (lvt_cnt == max_lvt_cnt) {
2546 max_lvt_cnt <<= 1;
2547 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2548 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2549 }
2550 localvariable_table_start[lvt_cnt] =
2551 parse_localvariable_table(cfs,
2552 code_length,
2553 max_locals,
2554 code_attribute_length,
2555 &localvariable_table_length[lvt_cnt],
2556 false, // is not LVTT
2557 CHECK_NULL);
2558 total_lvt_length += localvariable_table_length[lvt_cnt];
2559 lvt_cnt++;
2560 } else if (LoadLocalVariableTypeTables &&
2561 _major_version >= JAVA_1_5_VERSION &&
2562 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2563 if (!lvt_allocated) {
2564 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2565 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2566 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2567 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2568 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2569 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2570 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2571 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2572 lvt_allocated = true;
2573 }
2574 // Parse local variable type table
2575 if (lvtt_cnt == max_lvtt_cnt) {
2576 max_lvtt_cnt <<= 1;
2577 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2578 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2579 }
2580 localvariable_type_table_start[lvtt_cnt] =
2581 parse_localvariable_table(cfs,
2582 code_length,
2583 max_locals,
2584 code_attribute_length,
2585 &localvariable_type_table_length[lvtt_cnt],
2586 true, // is LVTT
2587 CHECK_NULL);
2588 lvtt_cnt++;
2589 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2590 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2591 // Stack map is only needed by the new verifier in JDK1.5.
2592 if (parsed_stackmap_attribute) {
2593 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2594 }
2595 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2596 stackmap_data_length = code_attribute_length;
2597 parsed_stackmap_attribute = true;
2598 } else {
2599 // Skip unknown attributes
2600 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2601 }
2602 }
2603 // check method attribute length
2604 if (_need_verify) {
2605 guarantee_property(method_attribute_length == calculated_attribute_length,
2606 "Code segment has wrong length in class file %s",
2607 CHECK_NULL);
2608 }
2609 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2610 // Parse Exceptions attribute
2611 if (parsed_checked_exceptions_attribute) {
2612 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2613 CHECK_NULL);
2614 }
2615 parsed_checked_exceptions_attribute = true;
2616 checked_exceptions_start =
2617 parse_checked_exceptions(cfs,
2618 &checked_exceptions_length,
2619 method_attribute_length,
2620 CHECK_NULL);
2621 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2622 // reject multiple method parameters
2623 if (method_parameters_seen) {
2624 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2625 CHECK_NULL);
2626 }
2627 method_parameters_seen = true;
2628 method_parameters_length = cfs->get_u1_fast();
2629 const u2 real_length = (method_parameters_length * 4u) + 1u;
2630 if (method_attribute_length != real_length) {
2631 classfile_parse_error(
2632 "Invalid MethodParameters method attribute length %u in class file",
2633 method_attribute_length, CHECK_NULL);
2634 }
2635 method_parameters_data = cfs->get_u1_buffer();
2636 cfs->skip_u2_fast(method_parameters_length);
2637 cfs->skip_u2_fast(method_parameters_length);
2638 // ignore this attribute if it cannot be reflected
2639 if (!SystemDictionary::Parameter_klass_loaded())
2640 method_parameters_length = -1;
2641 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2642 if (method_attribute_length != 0) {
2643 classfile_parse_error(
2644 "Invalid Synthetic method attribute length %u in class file %s",
2645 method_attribute_length, CHECK_NULL);
2646 }
2647 // Should we check that there hasn't already been a synthetic attribute?
2648 access_flags.set_is_synthetic();
2649 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2650 if (method_attribute_length != 0) {
2651 classfile_parse_error(
2652 "Invalid Deprecated method attribute length %u in class file %s",
2653 method_attribute_length, CHECK_NULL);
2654 }
2655 } else if (_major_version >= JAVA_1_5_VERSION) {
2656 if (method_attribute_name == vmSymbols::tag_signature()) {
2657 if (generic_signature_index != 0) {
2658 classfile_parse_error(
2659 "Multiple Signature attributes for method in class file %s",
2660 CHECK_NULL);
2661 }
2662 if (method_attribute_length != 2) {
2663 classfile_parse_error(
2664 "Invalid Signature attribute length %u in class file %s",
2665 method_attribute_length, CHECK_NULL);
2666 }
2667 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2668 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2669 if (runtime_visible_annotations != NULL) {
2670 classfile_parse_error(
2671 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2672 CHECK_NULL);
2673 }
2674 runtime_visible_annotations_length = method_attribute_length;
2675 runtime_visible_annotations = cfs->get_u1_buffer();
2676 assert(runtime_visible_annotations != NULL, "null visible annotations");
2677 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2678 parse_annotations(cp,
2679 runtime_visible_annotations,
2680 runtime_visible_annotations_length,
2681 &parsed_annotations,
2682 _loader_data,
2683 CHECK_NULL);
2684 cfs->skip_u1_fast(runtime_visible_annotations_length);
2685 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2686 if (runtime_invisible_annotations_exists) {
2687 classfile_parse_error(
2688 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2689 CHECK_NULL);
2690 }
2691 runtime_invisible_annotations_exists = true;
2692 if (PreserveAllAnnotations) {
2693 runtime_invisible_annotations_length = method_attribute_length;
2694 runtime_invisible_annotations = cfs->get_u1_buffer();
2695 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2696 }
2697 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2698 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2699 if (runtime_visible_parameter_annotations != NULL) {
2700 classfile_parse_error(
2701 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2702 CHECK_NULL);
2703 }
2704 runtime_visible_parameter_annotations_length = method_attribute_length;
2705 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2706 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2707 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2708 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2709 if (runtime_invisible_parameter_annotations_exists) {
2710 classfile_parse_error(
2711 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2712 CHECK_NULL);
2713 }
2714 runtime_invisible_parameter_annotations_exists = true;
2715 if (PreserveAllAnnotations) {
2716 runtime_invisible_parameter_annotations_length = method_attribute_length;
2717 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2718 assert(runtime_invisible_parameter_annotations != NULL,
2719 "null invisible parameter annotations");
2720 }
2721 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2722 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2723 if (annotation_default != NULL) {
2724 classfile_parse_error(
2725 "Multiple AnnotationDefault attributes for method in class file %s",
2726 CHECK_NULL);
2727 }
2728 annotation_default_length = method_attribute_length;
2729 annotation_default = cfs->get_u1_buffer();
2730 assert(annotation_default != NULL, "null annotation default");
2731 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2732 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2733 if (runtime_visible_type_annotations != NULL) {
2734 classfile_parse_error(
2735 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2736 CHECK_NULL);
2737 }
2738 runtime_visible_type_annotations_length = method_attribute_length;
2739 runtime_visible_type_annotations = cfs->get_u1_buffer();
2740 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2741 // No need for the VM to parse Type annotations
2742 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2743 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2744 if (runtime_invisible_type_annotations_exists) {
2745 classfile_parse_error(
2746 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2747 CHECK_NULL);
2748 } else {
2749 runtime_invisible_type_annotations_exists = true;
2750 }
2751 if (PreserveAllAnnotations) {
2752 runtime_invisible_type_annotations_length = method_attribute_length;
2753 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2754 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2755 }
2756 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2757 } else {
2758 // Skip unknown attributes
2759 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2760 }
2761 } else {
2762 // Skip unknown attributes
2763 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2764 }
2765 }
2766
2767 if (linenumber_table != NULL) {
2768 linenumber_table->write_terminator();
2769 linenumber_table_length = linenumber_table->position();
2770 }
2771
2772 // Make sure there's at least one Code attribute in non-native/non-abstract method
2773 if (_need_verify) {
2774 guarantee_property(access_flags.is_native() ||
2775 access_flags.is_abstract() ||
2776 parsed_code_attribute,
2777 "Absent Code attribute in method that is not native or abstract in class file %s",
2778 CHECK_NULL);
2779 }
2780
2781 // All sizing information for a Method* is finally available, now create it
2782 InlineTableSizes sizes(
2783 total_lvt_length,
2784 linenumber_table_length,
2785 exception_table_length,
2786 checked_exceptions_length,
2787 method_parameters_length,
2788 generic_signature_index,
2789 runtime_visible_annotations_length +
2790 runtime_invisible_annotations_length,
2791 runtime_visible_parameter_annotations_length +
2792 runtime_invisible_parameter_annotations_length,
2793 runtime_visible_type_annotations_length +
2794 runtime_invisible_type_annotations_length,
2795 annotation_default_length,
2796 0);
2797
2798 Method* const m = Method::allocate(_loader_data,
2799 code_length,
2800 access_flags,
2801 &sizes,
2802 ConstMethod::NORMAL,
2803 CHECK_NULL);
2804
2805 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2806
2807 // Fill in information from fixed part (access_flags already set)
2808 m->set_constants(_cp);
2809 m->set_name_index(name_index);
2810 m->set_signature_index(signature_index);
2811
2812 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2813 m->constMethod()->set_result_type(rtf.type());
2814
2815 if (args_size >= 0) {
2816 m->set_size_of_parameters(args_size);
2817 } else {
2818 m->compute_size_of_parameters(THREAD);
2819 }
2820 #ifdef ASSERT
2821 if (args_size >= 0) {
2822 m->compute_size_of_parameters(THREAD);
2823 assert(args_size == m->size_of_parameters(), "");
2824 }
2825 #endif
2826
2827 // Fill in code attribute information
2828 m->set_max_stack(max_stack);
2829 m->set_max_locals(max_locals);
2830 if (stackmap_data != NULL) {
2831 m->constMethod()->copy_stackmap_data(_loader_data,
2832 (u1*)stackmap_data,
2833 stackmap_data_length,
2834 CHECK_NULL);
2835 }
2836
2837 // Copy byte codes
2838 m->set_code((u1*)code_start);
2839
2840 // Copy line number table
2841 if (linenumber_table != NULL) {
2842 memcpy(m->compressed_linenumber_table(),
2843 linenumber_table->buffer(),
2844 linenumber_table_length);
2845 }
2846
2847 // Copy exception table
2848 if (exception_table_length > 0) {
2849 int size =
2850 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2851 copy_u2_with_conversion((u2*) m->exception_table_start(),
2852 exception_table_start, size);
2853 }
2854
2855 // Copy method parameters
2856 if (method_parameters_length > 0) {
2857 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2858 for (int i = 0; i < method_parameters_length; i++) {
2859 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2860 method_parameters_data += 2;
2861 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2862 method_parameters_data += 2;
2863 }
2864 }
2865
2866 // Copy checked exceptions
2867 if (checked_exceptions_length > 0) {
2868 const int size =
2869 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2870 copy_u2_with_conversion((u2*) m->checked_exceptions_start(),
2871 checked_exceptions_start,
2872 size);
2873 }
2874
2875 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2876 if (total_lvt_length > 0) {
2877 promoted_flags->set_has_localvariable_table();
2878 copy_localvariable_table(m->constMethod(),
2879 lvt_cnt,
2880 localvariable_table_length,
2881 localvariable_table_start,
2882 lvtt_cnt,
2883 localvariable_type_table_length,
2884 localvariable_type_table_start,
2885 CHECK_NULL);
2886 }
2887
2888 if (parsed_annotations.has_any_annotations())
2889 parsed_annotations.apply_to(m);
2890
2891 // Copy annotations
2892 copy_method_annotations(m->constMethod(),
2893 runtime_visible_annotations,
2894 runtime_visible_annotations_length,
2895 runtime_invisible_annotations,
2896 runtime_invisible_annotations_length,
2897 runtime_visible_parameter_annotations,
2898 runtime_visible_parameter_annotations_length,
2899 runtime_invisible_parameter_annotations,
2900 runtime_invisible_parameter_annotations_length,
2901 runtime_visible_type_annotations,
2902 runtime_visible_type_annotations_length,
2903 runtime_invisible_type_annotations,
2904 runtime_invisible_type_annotations_length,
2905 annotation_default,
2906 annotation_default_length,
2907 CHECK_NULL);
2908
2909 if (name == vmSymbols::finalize_method_name() &&
2910 signature == vmSymbols::void_method_signature()) {
2911 if (m->is_empty_method()) {
2912 _has_empty_finalizer = true;
2913 } else {
2914 _has_finalizer = true;
2915 }
2916 }
2917 if (name == vmSymbols::object_initializer_name() &&
2918 signature == vmSymbols::void_method_signature() &&
2919 m->is_vanilla_constructor()) {
2920 _has_vanilla_constructor = true;
2921 }
2922
2923 NOT_PRODUCT(m->verify());
2924 return m;
2925 }
2926
2927
2928 // The promoted_flags parameter is used to pass relevant access_flags
2929 // from the methods back up to the containing klass. These flag values
2930 // are added to klass's access_flags.
2931 // Side-effects: populates the _methods field in the parser
2932 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2933 bool is_interface,
2934 AccessFlags* promoted_flags,
2935 bool* has_final_method,
2936 bool* declares_nonstatic_concrete_methods,
2937 TRAPS) {
2938 assert(cfs != NULL, "invariant");
2939 assert(promoted_flags != NULL, "invariant");
2940 assert(has_final_method != NULL, "invariant");
2941 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2942
2943 assert(NULL == _methods, "invariant");
2944
2945 cfs->guarantee_more(2, CHECK); // length
2946 const u2 length = cfs->get_u2_fast();
2947 if (length == 0) {
2948 _methods = Universe::the_empty_method_array();
2949 } else {
2950 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2951 length,
2952 NULL,
2953 CHECK);
2954
2955 for (int index = 0; index < length; index++) {
2956 Method* method = parse_method(cfs,
2957 is_interface,
2958 _cp,
2959 promoted_flags,
2960 CHECK);
2961
2962 if (method->is_final()) {
2963 *has_final_method = true;
2964 }
2965 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2966 // used for interface initialization, and default method inheritance analysis
2967 if (is_interface && !(*declares_nonstatic_concrete_methods)
2968 && !method->is_abstract() && !method->is_static()) {
2969 *declares_nonstatic_concrete_methods = true;
2970 }
2971 _methods->at_put(index, method);
2972 }
2973
2974 if (_need_verify && length > 1) {
2975 // Check duplicated methods
2976 ResourceMark rm(THREAD);
2977 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2978 THREAD, NameSigHash*, HASH_ROW_SIZE);
2979 initialize_hashtable(names_and_sigs);
2980 bool dup = false;
2981 const Symbol* name = NULL;
2982 const Symbol* sig = NULL;
2983 {
2984 debug_only(NoSafepointVerifier nsv;)
2985 for (int i = 0; i < length; i++) {
2986 const Method* const m = _methods->at(i);
2987 name = m->name();
2988 sig = m->signature();
2989 // If no duplicates, add name/signature in hashtable names_and_sigs.
2990 if (!put_after_lookup(name, sig, names_and_sigs)) {
2991 dup = true;
2992 break;
2993 }
2994 }
2995 }
2996 if (dup) {
2997 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2998 name->as_C_string(), sig->as_klass_external_name(), CHECK);
2999 }
3000 }
3001 }
3002 }
3003
3004 static const intArray* sort_methods(Array<Method*>* methods) {
3005 const int length = methods->length();
3006 // If JVMTI original method ordering or sharing is enabled we have to
3007 // remember the original class file ordering.
3008 // We temporarily use the vtable_index field in the Method* to store the
3009 // class file index, so we can read in after calling qsort.
3010 // Put the method ordering in the shared archive.
3011 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3012 for (int index = 0; index < length; index++) {
3013 Method* const m = methods->at(index);
3014 assert(!m->valid_vtable_index(), "vtable index should not be set");
3015 m->set_vtable_index(index);
3016 }
3017 }
3018 // Sort method array by ascending method name (for faster lookups & vtable construction)
3019 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3020 Method::sort_methods(methods);
3021
3022 intArray* method_ordering = NULL;
3023 // If JVMTI original method ordering or sharing is enabled construct int
3024 // array remembering the original ordering
3025 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3026 method_ordering = new intArray(length, length, -1);
3027 for (int index = 0; index < length; index++) {
3028 Method* const m = methods->at(index);
3029 const int old_index = m->vtable_index();
3030 assert(old_index >= 0 && old_index < length, "invalid method index");
3031 method_ordering->at_put(index, old_index);
3032 m->set_vtable_index(Method::invalid_vtable_index);
3033 }
3034 }
3035 return method_ordering;
3036 }
3037
3038 // Parse generic_signature attribute for methods and fields
3039 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3040 TRAPS) {
3041 assert(cfs != NULL, "invariant");
3042
3043 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3044 const u2 generic_signature_index = cfs->get_u2_fast();
3045 check_property(
3046 valid_symbol_at(generic_signature_index),
3047 "Invalid Signature attribute at constant pool index %u in class file %s",
3048 generic_signature_index, CHECK_0);
3049 return generic_signature_index;
3050 }
3051
3052 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3053 TRAPS) {
3054
3055 assert(cfs != NULL, "invariant");
3056
3057 cfs->guarantee_more(2, CHECK); // sourcefile_index
3058 const u2 sourcefile_index = cfs->get_u2_fast();
3059 check_property(
3060 valid_symbol_at(sourcefile_index),
3061 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3062 sourcefile_index, CHECK);
3063 set_class_sourcefile_index(sourcefile_index);
3064 }
3065
3066 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3067 int length,
3068 TRAPS) {
3069 assert(cfs != NULL, "invariant");
3070
3071 const u1* const sde_buffer = cfs->get_u1_buffer();
3072 assert(sde_buffer != NULL, "null sde buffer");
3073
3074 // Don't bother storing it if there is no way to retrieve it
3075 if (JvmtiExport::can_get_source_debug_extension()) {
3076 assert((length+1) > length, "Overflow checking");
3077 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3078 for (int i = 0; i < length; i++) {
3079 sde[i] = sde_buffer[i];
3080 }
3081 sde[length] = '\0';
3082 set_class_sde_buffer((const char*)sde, length);
3083 }
3084 // Got utf8 string, set stream position forward
3085 cfs->skip_u1(length, CHECK);
3086 }
3087
3088
3089 // Inner classes can be static, private or protected (classic VM does this)
3090 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3091 JVM_ACC_PRIVATE | \
3092 JVM_ACC_PROTECTED | \
3093 JVM_ACC_STATIC \
3094 )
3095
3096 // Return number of classes in the inner classes attribute table
3097 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3098 const u1* const inner_classes_attribute_start,
3099 bool parsed_enclosingmethod_attribute,
3100 u2 enclosing_method_class_index,
3101 u2 enclosing_method_method_index,
3102 TRAPS) {
3103 const u1* const current_mark = cfs->current();
3104 u2 length = 0;
3105 if (inner_classes_attribute_start != NULL) {
3106 cfs->set_current(inner_classes_attribute_start);
3107 cfs->guarantee_more(2, CHECK_0); // length
3108 length = cfs->get_u2_fast();
3109 }
3110
3111 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3112 // method data:
3113 // [inner_class_info_index,
3114 // outer_class_info_index,
3115 // inner_name_index,
3116 // inner_class_access_flags,
3117 // ...
3118 // enclosing_method_class_index,
3119 // enclosing_method_method_index]
3120 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3121 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3122 _inner_classes = inner_classes;
3123
3124 int index = 0;
3125 const int cp_size = _cp->length();
3126 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3127 for (int n = 0; n < length; n++) {
3128 // Inner class index
3129 const u2 inner_class_info_index = cfs->get_u2_fast();
3130 check_property(
3131 valid_klass_reference_at(inner_class_info_index),
3132 "inner_class_info_index %u has bad constant type in class file %s",
3133 inner_class_info_index, CHECK_0);
3134 // Outer class index
3135 const u2 outer_class_info_index = cfs->get_u2_fast();
3136 check_property(
3137 outer_class_info_index == 0 ||
3138 valid_klass_reference_at(outer_class_info_index),
3139 "outer_class_info_index %u has bad constant type in class file %s",
3140 outer_class_info_index, CHECK_0);
3141 // Inner class name
3142 const u2 inner_name_index = cfs->get_u2_fast();
3143 check_property(
3144 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3145 "inner_name_index %u has bad constant type in class file %s",
3146 inner_name_index, CHECK_0);
3147 if (_need_verify) {
3148 guarantee_property(inner_class_info_index != outer_class_info_index,
3149 "Class is both outer and inner class in class file %s", CHECK_0);
3150 }
3151 // Access flags
3152 jint flags;
3153 // JVM_ACC_MODULE is defined in JDK-9 and later.
3154 if (_major_version >= JAVA_9_VERSION) {
3155 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3156 } else {
3157 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3158 }
3159 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3160 // Set abstract bit for old class files for backward compatibility
3161 flags |= JVM_ACC_ABSTRACT;
3162 }
3163 verify_legal_class_modifiers(flags, CHECK_0);
3164 AccessFlags inner_access_flags(flags);
3165
3166 inner_classes->at_put(index++, inner_class_info_index);
3167 inner_classes->at_put(index++, outer_class_info_index);
3168 inner_classes->at_put(index++, inner_name_index);
3169 inner_classes->at_put(index++, inner_access_flags.as_short());
3170 }
3171
3172 // 4347400: make sure there's no duplicate entry in the classes array
3173 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3174 for(int i = 0; i < length * 4; i += 4) {
3175 for(int j = i + 4; j < length * 4; j += 4) {
3176 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3177 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3178 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3179 inner_classes->at(i+3) != inner_classes->at(j+3)),
3180 "Duplicate entry in InnerClasses in class file %s",
3181 CHECK_0);
3182 }
3183 }
3184 }
3185
3186 // Set EnclosingMethod class and method indexes.
3187 if (parsed_enclosingmethod_attribute) {
3188 inner_classes->at_put(index++, enclosing_method_class_index);
3189 inner_classes->at_put(index++, enclosing_method_method_index);
3190 }
3191 assert(index == size, "wrong size");
3192
3193 // Restore buffer's current position.
3194 cfs->set_current(current_mark);
3195
3196 return length;
3197 }
3198
3199 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3200 set_class_synthetic_flag(true);
3201 }
3202
3203 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3204 assert(cfs != NULL, "invariant");
3205
3206 const u2 signature_index = cfs->get_u2(CHECK);
3207 check_property(
3208 valid_symbol_at(signature_index),
3209 "Invalid constant pool index %u in Signature attribute in class file %s",
3210 signature_index, CHECK);
3211 set_class_generic_signature_index(signature_index);
3212 }
3213
3214 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3215 ConstantPool* cp,
3216 u4 attribute_byte_length,
3217 TRAPS) {
3218 assert(cfs != NULL, "invariant");
3219 assert(cp != NULL, "invariant");
3220
3221 const u1* const current_start = cfs->current();
3222
3223 guarantee_property(attribute_byte_length >= sizeof(u2),
3224 "Invalid BootstrapMethods attribute length %u in class file %s",
3225 attribute_byte_length,
3226 CHECK);
3227
3228 cfs->guarantee_more(attribute_byte_length, CHECK);
3229
3230 const int attribute_array_length = cfs->get_u2_fast();
3231
3232 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3233 "Short length on BootstrapMethods in class file %s",
3234 CHECK);
3235
3236
3237 // The attribute contains a counted array of counted tuples of shorts,
3238 // represending bootstrap specifiers:
3239 // length*{bootstrap_method_index, argument_count*{argument_index}}
3240 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3241 // operand_count = number of shorts in attr, except for leading length
3242
3243 // The attribute is copied into a short[] array.
3244 // The array begins with a series of short[2] pairs, one for each tuple.
3245 const int index_size = (attribute_array_length * 2);
3246
3247 Array<u2>* const operands =
3248 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3249
3250 // Eagerly assign operands so they will be deallocated with the constant
3251 // pool if there is an error.
3252 cp->set_operands(operands);
3253
3254 int operand_fill_index = index_size;
3255 const int cp_size = cp->length();
3256
3257 for (int n = 0; n < attribute_array_length; n++) {
3258 // Store a 32-bit offset into the header of the operand array.
3259 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3260
3261 // Read a bootstrap specifier.
3262 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3263 const u2 bootstrap_method_index = cfs->get_u2_fast();
3264 const u2 argument_count = cfs->get_u2_fast();
3265 check_property(
3266 valid_cp_range(bootstrap_method_index, cp_size) &&
3267 cp->tag_at(bootstrap_method_index).is_method_handle(),
3268 "bootstrap_method_index %u has bad constant type in class file %s",
3269 bootstrap_method_index,
3270 CHECK);
3271
3272 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3273 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3274 CHECK);
3275
3276 operands->at_put(operand_fill_index++, bootstrap_method_index);
3277 operands->at_put(operand_fill_index++, argument_count);
3278
3279 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3280 for (int j = 0; j < argument_count; j++) {
3281 const u2 argument_index = cfs->get_u2_fast();
3282 check_property(
3283 valid_cp_range(argument_index, cp_size) &&
3284 cp->tag_at(argument_index).is_loadable_constant(),
3285 "argument_index %u has bad constant type in class file %s",
3286 argument_index,
3287 CHECK);
3288 operands->at_put(operand_fill_index++, argument_index);
3289 }
3290 }
3291 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3292 "Bad length on BootstrapMethods in class file %s",
3293 CHECK);
3294 }
3295
3296 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3297 ConstantPool* cp,
3298 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3299 TRAPS) {
3300 assert(cfs != NULL, "invariant");
3301 assert(cp != NULL, "invariant");
3302 assert(parsed_annotations != NULL, "invariant");
3303
3304 // Set inner classes attribute to default sentinel
3305 _inner_classes = Universe::the_empty_short_array();
3306 cfs->guarantee_more(2, CHECK); // attributes_count
3307 u2 attributes_count = cfs->get_u2_fast();
3308 bool parsed_sourcefile_attribute = false;
3309 bool parsed_innerclasses_attribute = false;
3310 bool parsed_enclosingmethod_attribute = false;
3311 bool parsed_bootstrap_methods_attribute = false;
3312 const u1* runtime_visible_annotations = NULL;
3313 int runtime_visible_annotations_length = 0;
3314 const u1* runtime_invisible_annotations = NULL;
3315 int runtime_invisible_annotations_length = 0;
3316 const u1* runtime_visible_type_annotations = NULL;
3317 int runtime_visible_type_annotations_length = 0;
3318 const u1* runtime_invisible_type_annotations = NULL;
3319 int runtime_invisible_type_annotations_length = 0;
3320 bool runtime_invisible_type_annotations_exists = false;
3321 bool runtime_invisible_annotations_exists = false;
3322 bool parsed_source_debug_ext_annotations_exist = false;
3323 const u1* inner_classes_attribute_start = NULL;
3324 u4 inner_classes_attribute_length = 0;
3325 u2 enclosing_method_class_index = 0;
3326 u2 enclosing_method_method_index = 0;
3327 // Iterate over attributes
3328 while (attributes_count--) {
3329 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3330 const u2 attribute_name_index = cfs->get_u2_fast();
3331 const u4 attribute_length = cfs->get_u4_fast();
3332 check_property(
3333 valid_symbol_at(attribute_name_index),
3334 "Attribute name has bad constant pool index %u in class file %s",
3335 attribute_name_index, CHECK);
3336 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3337 if (tag == vmSymbols::tag_source_file()) {
3338 // Check for SourceFile tag
3339 if (_need_verify) {
3340 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3341 }
3342 if (parsed_sourcefile_attribute) {
3343 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3344 } else {
3345 parsed_sourcefile_attribute = true;
3346 }
3347 parse_classfile_sourcefile_attribute(cfs, CHECK);
3348 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3349 // Check for SourceDebugExtension tag
3350 if (parsed_source_debug_ext_annotations_exist) {
3351 classfile_parse_error(
3352 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3353 }
3354 parsed_source_debug_ext_annotations_exist = true;
3355 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3356 } else if (tag == vmSymbols::tag_inner_classes()) {
3357 // Check for InnerClasses tag
3358 if (parsed_innerclasses_attribute) {
3359 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3360 } else {
3361 parsed_innerclasses_attribute = true;
3362 }
3363 inner_classes_attribute_start = cfs->get_u1_buffer();
3364 inner_classes_attribute_length = attribute_length;
3365 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3366 } else if (tag == vmSymbols::tag_synthetic()) {
3367 // Check for Synthetic tag
3368 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3369 if (attribute_length != 0) {
3370 classfile_parse_error(
3371 "Invalid Synthetic classfile attribute length %u in class file %s",
3372 attribute_length, CHECK);
3373 }
3374 parse_classfile_synthetic_attribute(CHECK);
3375 } else if (tag == vmSymbols::tag_deprecated()) {
3376 // Check for Deprecatd tag - 4276120
3377 if (attribute_length != 0) {
3378 classfile_parse_error(
3379 "Invalid Deprecated classfile attribute length %u in class file %s",
3380 attribute_length, CHECK);
3381 }
3382 } else if (_major_version >= JAVA_1_5_VERSION) {
3383 if (tag == vmSymbols::tag_signature()) {
3384 if (_generic_signature_index != 0) {
3385 classfile_parse_error(
3386 "Multiple Signature attributes in class file %s", CHECK);
3387 }
3388 if (attribute_length != 2) {
3389 classfile_parse_error(
3390 "Wrong Signature attribute length %u in class file %s",
3391 attribute_length, CHECK);
3392 }
3393 parse_classfile_signature_attribute(cfs, CHECK);
3394 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3395 if (runtime_visible_annotations != NULL) {
3396 classfile_parse_error(
3397 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3398 }
3399 runtime_visible_annotations_length = attribute_length;
3400 runtime_visible_annotations = cfs->get_u1_buffer();
3401 assert(runtime_visible_annotations != NULL, "null visible annotations");
3402 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3403 parse_annotations(cp,
3404 runtime_visible_annotations,
3405 runtime_visible_annotations_length,
3406 parsed_annotations,
3407 _loader_data,
3408 CHECK);
3409 cfs->skip_u1_fast(runtime_visible_annotations_length);
3410 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3411 if (runtime_invisible_annotations_exists) {
3412 classfile_parse_error(
3413 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3414 }
3415 runtime_invisible_annotations_exists = true;
3416 if (PreserveAllAnnotations) {
3417 runtime_invisible_annotations_length = attribute_length;
3418 runtime_invisible_annotations = cfs->get_u1_buffer();
3419 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3420 }
3421 cfs->skip_u1(attribute_length, CHECK);
3422 } else if (tag == vmSymbols::tag_enclosing_method()) {
3423 if (parsed_enclosingmethod_attribute) {
3424 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3425 } else {
3426 parsed_enclosingmethod_attribute = true;
3427 }
3428 guarantee_property(attribute_length == 4,
3429 "Wrong EnclosingMethod attribute length %u in class file %s",
3430 attribute_length, CHECK);
3431 cfs->guarantee_more(4, CHECK); // class_index, method_index
3432 enclosing_method_class_index = cfs->get_u2_fast();
3433 enclosing_method_method_index = cfs->get_u2_fast();
3434 if (enclosing_method_class_index == 0) {
3435 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3436 }
3437 // Validate the constant pool indices and types
3438 check_property(valid_klass_reference_at(enclosing_method_class_index),
3439 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3440 if (enclosing_method_method_index != 0 &&
3441 (!cp->is_within_bounds(enclosing_method_method_index) ||
3442 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3443 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3444 }
3445 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3446 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3447 if (parsed_bootstrap_methods_attribute) {
3448 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3449 }
3450 parsed_bootstrap_methods_attribute = true;
3451 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3452 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3453 if (runtime_visible_type_annotations != NULL) {
3454 classfile_parse_error(
3455 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3456 }
3457 runtime_visible_type_annotations_length = attribute_length;
3458 runtime_visible_type_annotations = cfs->get_u1_buffer();
3459 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3460 // No need for the VM to parse Type annotations
3461 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3462 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3463 if (runtime_invisible_type_annotations_exists) {
3464 classfile_parse_error(
3465 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3466 } else {
3467 runtime_invisible_type_annotations_exists = true;
3468 }
3469 if (PreserveAllAnnotations) {
3470 runtime_invisible_type_annotations_length = attribute_length;
3471 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3472 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3473 }
3474 cfs->skip_u1(attribute_length, CHECK);
3475 } else {
3476 // Unknown attribute
3477 cfs->skip_u1(attribute_length, CHECK);
3478 }
3479 } else {
3480 // Unknown attribute
3481 cfs->skip_u1(attribute_length, CHECK);
3482 }
3483 }
3484 _annotations = assemble_annotations(runtime_visible_annotations,
3485 runtime_visible_annotations_length,
3486 runtime_invisible_annotations,
3487 runtime_invisible_annotations_length,
3488 CHECK);
3489 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3490 runtime_visible_type_annotations_length,
3491 runtime_invisible_type_annotations,
3492 runtime_invisible_type_annotations_length,
3493 CHECK);
3494
3495 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3496 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3497 cfs,
3498 inner_classes_attribute_start,
3499 parsed_innerclasses_attribute,
3500 enclosing_method_class_index,
3501 enclosing_method_method_index,
3502 CHECK);
3503 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3504 guarantee_property(
3505 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3506 "Wrong InnerClasses attribute length in class file %s", CHECK);
3507 }
3508 }
3509
3510 if (_max_bootstrap_specifier_index >= 0) {
3511 guarantee_property(parsed_bootstrap_methods_attribute,
3512 "Missing BootstrapMethods attribute in class file %s", CHECK);
3513 }
3514 }
3515
3516 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3517 assert(k != NULL, "invariant");
3518
3519 if (_synthetic_flag)
3520 k->set_is_synthetic();
3521 if (_sourcefile_index != 0) {
3522 k->set_source_file_name_index(_sourcefile_index);
3523 }
3524 if (_generic_signature_index != 0) {
3525 k->set_generic_signature_index(_generic_signature_index);
3526 }
3527 if (_sde_buffer != NULL) {
3528 k->set_source_debug_extension(_sde_buffer, _sde_length);
3529 }
3530 }
3531
3532 // Create the Annotations object that will
3533 // hold the annotations array for the Klass.
3534 void ClassFileParser::create_combined_annotations(TRAPS) {
3535 if (_annotations == NULL &&
3536 _type_annotations == NULL &&
3537 _fields_annotations == NULL &&
3538 _fields_type_annotations == NULL) {
3539 // Don't create the Annotations object unnecessarily.
3540 return;
3541 }
3542
3543 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3544 annotations->set_class_annotations(_annotations);
3545 annotations->set_class_type_annotations(_type_annotations);
3546 annotations->set_fields_annotations(_fields_annotations);
3547 annotations->set_fields_type_annotations(_fields_type_annotations);
3548
3549 // This is the Annotations object that will be
3550 // assigned to InstanceKlass being constructed.
3551 _combined_annotations = annotations;
3552
3553 // The annotations arrays below has been transfered the
3554 // _combined_annotations so these fields can now be cleared.
3555 _annotations = NULL;
3556 _type_annotations = NULL;
3557 _fields_annotations = NULL;
3558 _fields_type_annotations = NULL;
3559 }
3560
3561 // Transfer ownership of metadata allocated to the InstanceKlass.
3562 void ClassFileParser::apply_parsed_class_metadata(
3563 InstanceKlass* this_klass,
3564 int java_fields_count, TRAPS) {
3565 assert(this_klass != NULL, "invariant");
3566
3567 _cp->set_pool_holder(this_klass);
3568 this_klass->set_constants(_cp);
3569 this_klass->set_fields(_fields, java_fields_count);
3570 this_klass->set_methods(_methods);
3571 this_klass->set_inner_classes(_inner_classes);
3572 this_klass->set_local_interfaces(_local_interfaces);
3573 this_klass->set_transitive_interfaces(_transitive_interfaces);
3574 this_klass->set_annotations(_combined_annotations);
3575
3576 // Clear out these fields so they don't get deallocated by the destructor
3577 clear_class_metadata();
3578 }
3579
3580 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3581 int runtime_visible_annotations_length,
3582 const u1* const runtime_invisible_annotations,
3583 int runtime_invisible_annotations_length,
3584 TRAPS) {
3585 AnnotationArray* annotations = NULL;
3586 if (runtime_visible_annotations != NULL ||
3587 runtime_invisible_annotations != NULL) {
3588 annotations = MetadataFactory::new_array<u1>(_loader_data,
3589 runtime_visible_annotations_length +
3590 runtime_invisible_annotations_length,
3591 CHECK_(annotations));
3592 if (runtime_visible_annotations != NULL) {
3593 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3594 annotations->at_put(i, runtime_visible_annotations[i]);
3595 }
3596 }
3597 if (runtime_invisible_annotations != NULL) {
3598 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3599 int append = runtime_visible_annotations_length+i;
3600 annotations->at_put(append, runtime_invisible_annotations[i]);
3601 }
3602 }
3603 }
3604 return annotations;
3605 }
3606
3607 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3608 const int super_class_index,
3609 const bool need_verify,
3610 TRAPS) {
3611 assert(cp != NULL, "invariant");
3612 const InstanceKlass* super_klass = NULL;
3613
3614 if (super_class_index == 0) {
3615 check_property(_class_name == vmSymbols::java_lang_Object()
3616 || (_access_flags.get_flags() & JVM_ACC_VALUE),
3617 "Invalid superclass index %u in class file %s",
3618 super_class_index,
3619 CHECK_NULL);
3620 } else {
3621 check_property(valid_klass_reference_at(super_class_index),
3622 "Invalid superclass index %u in class file %s",
3623 super_class_index,
3624 CHECK_NULL);
3625 // The class name should be legal because it is checked when parsing constant pool.
3626 // However, make sure it is not an array type.
3627 bool is_array = false;
3628 if (cp->tag_at(super_class_index).is_klass()) {
3629 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3630 if (need_verify)
3631 is_array = super_klass->is_array_klass();
3632 } else if (need_verify) {
3633 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3634 }
3635 if (need_verify) {
3636 guarantee_property(!is_array,
3637 "Bad superclass name in class file %s", CHECK_NULL);
3638 }
3639 }
3640 return super_klass;
3641 }
3642
3643 #ifndef PRODUCT
3644 static void print_field_layout(const Symbol* name,
3645 Array<u2>* fields,
3646 constantPoolHandle cp,
3647 int instance_size,
3648 int instance_fields_start,
3649 int instance_fields_end,
3650 int static_fields_end) {
3651
3652 assert(name != NULL, "invariant");
3653
3654 tty->print("%s: field layout\n", name->as_klass_external_name());
3655 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3656 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3657 if (!fs.access_flags().is_static()) {
3658 tty->print(" @%3d \"%s\" %s\n",
3659 fs.offset(),
3660 fs.name()->as_klass_external_name(),
3661 fs.signature()->as_klass_external_name());
3662 }
3663 }
3664 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3665 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3666 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3667 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3668 if (fs.access_flags().is_static()) {
3669 tty->print(" @%3d \"%s\" %s\n",
3670 fs.offset(),
3671 fs.name()->as_klass_external_name(),
3672 fs.signature()->as_klass_external_name());
3673 }
3674 }
3675 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3676 tty->print("\n");
3677 }
3678 #endif
3679
3680 // Values needed for oopmap and InstanceKlass creation
3681 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3682 public:
3683 OopMapBlocksBuilder* oop_map_blocks;
3684 int instance_size;
3685 int nonstatic_field_size;
3686 int static_field_size;
3687 bool has_nonstatic_fields;
3688 };
3689
3690 // Utility to collect and compact oop maps during layout
3691 class ClassFileParser::OopMapBlocksBuilder : public ResourceObj {
3692 public:
3693 OopMapBlock* nonstatic_oop_maps;
3694 unsigned int nonstatic_oop_map_count;
3695 unsigned int max_nonstatic_oop_maps;
3696
3697 public:
3698 OopMapBlocksBuilder(unsigned int max_blocks, TRAPS) {
3699 max_nonstatic_oop_maps = max_blocks;
3700 nonstatic_oop_map_count = 0;
3701 if (max_blocks == 0) {
3702 nonstatic_oop_maps = NULL;
3703 } else {
3704 nonstatic_oop_maps = NEW_RESOURCE_ARRAY_IN_THREAD(
3705 THREAD, OopMapBlock, max_nonstatic_oop_maps);
3706 memset(nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
3707 }
3708 }
3709
3710 OopMapBlock* last_oop_map() const {
3711 assert(nonstatic_oop_map_count > 0, "Has no oop maps");
3712 return nonstatic_oop_maps + (nonstatic_oop_map_count - 1);
3713 }
3714
3715 // addition of super oop maps
3716 void initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
3717 assert(nof_blocks && nonstatic_oop_map_count == 0 &&
3718 nof_blocks <= max_nonstatic_oop_maps, "invariant");
3719
3720 memcpy(nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
3721 nonstatic_oop_map_count += nof_blocks;
3722 }
3723
3724 // collection of oops
3725 void add(int offset, int count) {
3726 if (nonstatic_oop_map_count == 0) {
3727 nonstatic_oop_map_count++;
3728 }
3729 OopMapBlock* nonstatic_oop_map = last_oop_map();
3730 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up
3731 nonstatic_oop_map->set_offset(offset);
3732 nonstatic_oop_map->set_count(count);
3733 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
3734 nonstatic_oop_map->increment_count(count);
3735 } else { // Need a new one...
3736 nonstatic_oop_map_count++;
3737 assert(nonstatic_oop_map_count <= max_nonstatic_oop_maps, "range check");
3738 nonstatic_oop_map = last_oop_map();
3739 nonstatic_oop_map->set_offset(offset);
3740 nonstatic_oop_map->set_count(count);
3741 }
3742 }
3743
3744 // general purpose copy, e.g. into allocated instanceKlass
3745 void copy(OopMapBlock* dst) {
3746 if (nonstatic_oop_map_count != 0) {
3747 memcpy(dst, nonstatic_oop_maps, sizeof(OopMapBlock) * nonstatic_oop_map_count);
3748 }
3749 }
3750
3751 // Sort and compact adjacent blocks
3752 void compact(TRAPS) {
3753 if (nonstatic_oop_map_count <= 1) {
3754 return;
3755 }
3756 /*
3757 * Since field layout sneeks in oops before values, we will be able to condense
3758 * blocks. There is potential to compact between super, own refs and values
3759 * containing refs.
3760 *
3761 * Currently compaction is slightly limited due to values being 8 byte aligned.
3762 * This may well change: FixMe if doesn't, the code below is fairly general purpose
3763 * and maybe it doesn't need to be.
3764 */
3765 qsort(nonstatic_oop_maps, nonstatic_oop_map_count, sizeof(OopMapBlock),
3766 (_sort_Fn)OopMapBlock::compare_offset);
3767 if (nonstatic_oop_map_count < 2) {
3768 return;
3769 }
3770
3771 //Make a temp copy, and iterate through and copy back into the orig
3772 ResourceMark rm(THREAD);
3773 OopMapBlock* oop_maps_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, OopMapBlock,
3774 nonstatic_oop_map_count);
3775 OopMapBlock* oop_maps_copy_end = oop_maps_copy + nonstatic_oop_map_count;
3776 copy(oop_maps_copy);
3777 OopMapBlock* nonstatic_oop_map = nonstatic_oop_maps;
3778 unsigned int new_count = 1;
3779 oop_maps_copy++;
3780 while(oop_maps_copy < oop_maps_copy_end) {
3781 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
3782 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
3783 nonstatic_oop_map->increment_count(oop_maps_copy->count());
3784 } else {
3785 nonstatic_oop_map++;
3786 new_count++;
3787 nonstatic_oop_map->set_offset(oop_maps_copy->offset());
3788 nonstatic_oop_map->set_count(oop_maps_copy->count());
3789 }
3790 oop_maps_copy++;
3791 }
3792 assert(new_count <= nonstatic_oop_map_count, "end up with more maps after compact() ?");
3793 nonstatic_oop_map_count = new_count;
3794 }
3795
3796 void print_on(outputStream* st) const {
3797 st->print_cr(" OopMapBlocks: %3d /%3d", nonstatic_oop_map_count, max_nonstatic_oop_maps);
3798 if (nonstatic_oop_map_count > 0) {
3799 OopMapBlock* map = nonstatic_oop_maps;
3800 OopMapBlock* last_map = last_oop_map();
3801 assert(map <= last_map, "Last less than first");
3802 while (map <= last_map) {
3803 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(),
3804 map->offset() + map->offset_span() - heapOopSize, map->count());
3805 map++;
3806 }
3807 }
3808 }
3809
3810 void print_value_on(outputStream* st) const {
3811 print_on(st);
3812 }
3813
3814 };
3815
3816 void ClassFileParser::throwValueTypeLimitation(THREAD_AND_LOCATION_DECL,
3817 const char* msg,
3818 const Symbol* name,
3819 const Symbol* sig) const {
3820
3821 ResourceMark rm(THREAD);
3822 if (name == NULL || sig == NULL) {
3823 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
3824 vmSymbols::java_lang_ClassFormatError(),
3825 "class: %s - %s", _class_name->as_C_string(), msg);
3826 }
3827 else {
3828 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
3829 vmSymbols::java_lang_ClassFormatError(),
3830 "\"%s\" sig: \"%s\" class: %s - %s", name->as_C_string(), sig->as_C_string(),
3831 _class_name->as_C_string(), msg);
3832 }
3833 }
3834
3835 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3836 void ClassFileParser::layout_fields(ConstantPool* cp,
3837 FieldAllocationCount* fac,
3838 const ClassAnnotationCollector* parsed_annotations,
3839 FieldLayoutInfo* info,
3840 TRAPS) {
3841
3842 assert(cp != NULL, "invariant");
3843
3844 // Field size and offset computation
3845 int nonstatic_field_size = _super_klass == NULL ? 0 :
3846 _super_klass->nonstatic_field_size();
3847 int next_nonstatic_valuetype_offset = 0;
3848 int first_nonstatic_valuetype_offset = 0;
3849
3850 // Fields that are value types are handled differently depending if they are static or not:
3851 // - static fields are oops
3852 // - non-static fields are embedded
3853
3854 // Count the contended fields by type.
3855 //
3856 // We ignore static fields, because @Contended is not supported for them.
3857 // The layout code below will also ignore the static fields.
3858 int nonstatic_contended_count = 0;
3859 FieldAllocationCount fac_contended;
3860
3861 // Redistribute value types if possible, gather their klasses, oopmap count...
3862 unsigned int value_type_oop_map_count = 0;
3863 int large_value_count = 0;
3864 ValueKlass** nonstatic_value_type_klasses =
3865 NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, ValueKlass*, fac->count[NONSTATIC_VALUETYPE]);
3866
3867 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3868 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3869 if (fs.is_contended()) {
3870 fac_contended.count[atype]++;
3871 if (!fs.access_flags().is_static()) {
3872 nonstatic_contended_count++;
3873 }
3874 }
3875 else if (atype == NONSTATIC_VALUETYPE) {
3876 Symbol* signature = fs.signature();
3877 Klass* klass = SystemDictionary::resolve_or_fail(signature,
3878 Handle(THREAD, _loader_data->class_loader()),
3879 _protection_domain, true, CHECK);
3880 assert(klass != NULL && klass->access_flags().is_value_type(), "Sanity check");
3881 ValueKlass* vklass = ValueKlass::cast(klass);
3882 if (vklass->contains_oops()) {
3883 value_type_oop_map_count += vklass->nonstatic_oop_map_count();
3884 }
3885 int raw_value_size = vklass->raw_value_byte_size();
3886 FieldAllocationType atype = fac->redistribute_value(vklass->contains_oops(), raw_value_size);
3887 if (atype == NONSTATIC_VALUETYPE) {
3888 // Failed to slot in with the others, allocate large values last jlong align for safe copy
3889 nonstatic_value_type_klasses[large_value_count++] = vklass;
3890 } else {
3891 fs.coerce_allocation_type(NONSTATIC_VALUETYPE, (int) atype);
3892 }
3893 }
3894 }
3895
3896
3897 // Calculate the starting byte offsets
3898 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3899 // Value types in static fields are nor embedded, they are handled with oops
3900 int next_static_double_offset = next_static_oop_offset +
3901 ((fac->count[STATIC_OOP] + fac->count[STATIC_VALUETYPE]) * heapOopSize);
3902 if ( fac->count[STATIC_DOUBLE] &&
3903 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3904 Universe::field_type_should_be_aligned(T_LONG)) ) {
3905 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3906 }
3907
3908 int next_static_word_offset = next_static_double_offset +
3909 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3910 int next_static_short_offset = next_static_word_offset +
3911 ((fac->count[STATIC_WORD]) * BytesPerInt);
3912 int next_static_byte_offset = next_static_short_offset +
3913 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3914
3915 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3916 nonstatic_field_size * heapOopSize;
3917
3918 // First field of value types is aligned on a long boundary in order to ease
3919 // in-lining of value types (with header removal) in packed arrays and
3920 // flatten value types
3921 int initial_value_type_padding = 0;
3922 if (is_value_type() || is_derive_value_type()) {
3923 int old = nonstatic_fields_start;
3924 nonstatic_fields_start = align_size_up(nonstatic_fields_start, BytesPerLong);
3925 initial_value_type_padding = nonstatic_fields_start - old;
3926 }
3927
3928 int next_nonstatic_field_offset = nonstatic_fields_start;
3929
3930 const bool is_contended_class = parsed_annotations->is_contended();
3931
3932 // Class is contended, pad before all the fields
3933 if (is_contended_class) {
3934 next_nonstatic_field_offset += ContendedPaddingWidth;
3935 }
3936
3937 // Temporary value types restrictions
3938 if (is_value_type() || is_derive_value_type()) {
3939 if (is_contended_class) {
3940 throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support @Contended annotation yet");
3941 return;
3942 }
3943 }
3944
3945 // Compute the non-contended fields count.
3946 // The packing code below relies on these counts to determine if some field
3947 // can be squeezed into the alignment gap. Contended fields are obviously
3948 // exempt from that.
3949 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3950 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3951 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3952 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3953 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3954 unsigned int nonstatic_value_type_count = fac->count[NONSTATIC_VALUETYPE];
3955
3956 // Total non-static fields count, including every contended field
3957 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3958 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3959 fac->count[NONSTATIC_OOP] + fac->count[NONSTATIC_VALUETYPE];
3960
3961 const bool super_has_nonstatic_fields =
3962 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3963 const bool has_nonstatic_fields =
3964 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3965 const bool has_nonstatic_value_fields = nonstatic_value_type_count > 0;
3966
3967 // Prepare list of oops for oop map generation.
3968 //
3969 // "offset" and "count" lists are describing the set of contiguous oop
3970 // regions. offset[i] is the start of the i-th region, which then has
3971 // count[i] oops following. Before we know how many regions are required,
3972 // we pessimistically allocate the maps to fit all the oops into the
3973 // distinct regions.
3974 //
3975 int super_oop_map_count = (_super_klass == NULL) ? 0 :_super_klass->nonstatic_oop_map_count();
3976 int max_oop_map_count =
3977 super_oop_map_count +
3978 fac->count[NONSTATIC_OOP] +
3979 value_type_oop_map_count;
3980
3981 OopMapBlocksBuilder* nonstatic_oop_maps = new OopMapBlocksBuilder(max_oop_map_count, THREAD);
3982 if (super_oop_map_count > 0) {
3983 nonstatic_oop_maps->initialize_inherited_blocks(_super_klass->start_of_nonstatic_oop_maps(),
3984 _super_klass->nonstatic_oop_map_count());
3985 }
3986
3987 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3988
3989 bool compact_fields = CompactFields;
3990 int allocation_style = FieldsAllocationStyle;
3991 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3992 assert(false, "0 <= FieldsAllocationStyle <= 2");
3993 allocation_style = 1; // Optimistic
3994 }
3995
3996 // The next classes have predefined hard-coded fields offsets
3997 // (see in JavaClasses::compute_hard_coded_offsets()).
3998 // Use default fields allocation order for them.
3999 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
4000 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
4001 _class_name == vmSymbols::java_lang_Class() ||
4002 _class_name == vmSymbols::java_lang_ClassLoader() ||
4003 _class_name == vmSymbols::java_lang_ref_Reference() ||
4004 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
4005 _class_name == vmSymbols::java_lang_StackTraceElement() ||
4006 _class_name == vmSymbols::java_lang_String() ||
4007 _class_name == vmSymbols::java_lang_Throwable() ||
4008 _class_name == vmSymbols::java_lang_Boolean() ||
4009 _class_name == vmSymbols::java_lang_Character() ||
4010 _class_name == vmSymbols::java_lang_Float() ||
4011 _class_name == vmSymbols::java_lang_Double() ||
4012 _class_name == vmSymbols::java_lang_Byte() ||
4013 _class_name == vmSymbols::java_lang_Short() ||
4014 _class_name == vmSymbols::java_lang_Integer() ||
4015 _class_name == vmSymbols::java_lang_Long())) {
4016 allocation_style = 0; // Allocate oops first
4017 compact_fields = false; // Don't compact fields
4018 }
4019
4020 int next_nonstatic_oop_offset = 0;
4021 int next_nonstatic_double_offset = 0;
4022
4023 // Rearrange fields for a given allocation style
4024 if( allocation_style == 0 ) {
4025 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
4026 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4027 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4028 (nonstatic_oop_count * heapOopSize);
4029 } else if( allocation_style == 1 ) {
4030 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
4031 next_nonstatic_double_offset = next_nonstatic_field_offset;
4032 } else if( allocation_style == 2 ) {
4033 // Fields allocation: oops fields in super and sub classes are together.
4034 if( nonstatic_field_size > 0 && super_oop_map_count > 0 ) {
4035 if (next_nonstatic_field_offset == nonstatic_oop_maps->last_oop_map()->end_offset()) {
4036 allocation_style = 0; // allocate oops first
4037 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4038 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4039 (nonstatic_oop_count * heapOopSize);
4040 }
4041 }
4042 if( allocation_style == 2 ) {
4043 allocation_style = 1; // allocate oops last
4044 next_nonstatic_double_offset = next_nonstatic_field_offset;
4045 }
4046 } else {
4047 ShouldNotReachHere();
4048 }
4049
4050 int nonstatic_oop_space_count = 0;
4051 int nonstatic_word_space_count = 0;
4052 int nonstatic_short_space_count = 0;
4053 int nonstatic_byte_space_count = 0;
4054 int nonstatic_oop_space_offset = 0;
4055 int nonstatic_word_space_offset = 0;
4056 int nonstatic_short_space_offset = 0;
4057 int nonstatic_byte_space_offset = 0;
4058
4059 // Try to squeeze some of the fields into the gaps due to
4060 // long/double alignment.
4061 if (nonstatic_double_count > 0) {
4062 int offset = next_nonstatic_double_offset;
4063 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
4064 if (compact_fields && offset != next_nonstatic_double_offset) {
4065 // Allocate available fields into the gap before double field.
4066 int length = next_nonstatic_double_offset - offset;
4067 assert(length == BytesPerInt, "");
4068 nonstatic_word_space_offset = offset;
4069 if (nonstatic_word_count > 0) {
4070 nonstatic_word_count -= 1;
4071 nonstatic_word_space_count = 1; // Only one will fit
4072 length -= BytesPerInt;
4073 offset += BytesPerInt;
4074 }
4075 nonstatic_short_space_offset = offset;
4076 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4077 nonstatic_short_count -= 1;
4078 nonstatic_short_space_count += 1;
4079 length -= BytesPerShort;
4080 offset += BytesPerShort;
4081 }
4082 nonstatic_byte_space_offset = offset;
4083 while (length > 0 && nonstatic_byte_count > 0) {
4084 nonstatic_byte_count -= 1;
4085 nonstatic_byte_space_count += 1;
4086 length -= 1;
4087 }
4088 // Allocate oop field in the gap if there are no other fields for that.
4089 nonstatic_oop_space_offset = offset;
4090 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4091 allocation_style != 0) { // when oop fields not first
4092 nonstatic_oop_count -= 1;
4093 nonstatic_oop_space_count = 1; // Only one will fit
4094 length -= heapOopSize;
4095 offset += heapOopSize;
4096 }
4097 }
4098 }
4099
4100 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4101 (nonstatic_double_count * BytesPerLong);
4102 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4103 (nonstatic_word_count * BytesPerInt);
4104 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4105 (nonstatic_short_count * BytesPerShort);
4106 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4107 nonstatic_byte_count;
4108
4109 // let oops jump before padding with this allocation style
4110 if( allocation_style == 1 ) {
4111 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4112 if( nonstatic_oop_count > 0 ) {
4113 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
4114 }
4115 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4116 }
4117
4118 // Aligning embedded value types
4119 // bug below, the current algorithm to layout embedded value types always put them at the
4120 // end of the layout, which doesn't match the different allocation policies the VM is
4121 // supposed to provide => FixMe
4122 // Note also that the current alignment policy is to make each value type starting on a
4123 // 64 bits boundary. This could be optimized later. For instance, it could be nice to
4124 // align value types according to their most constrained internal type.
4125 next_nonstatic_valuetype_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4126 int next_value_type_index = 0;
4127
4128 // Iterate over fields again and compute correct offsets.
4129 // The field allocation type was temporarily stored in the offset slot.
4130 // oop fields are located before non-oop fields (static and non-static).
4131 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4132
4133 // skip already laid out fields
4134 if (fs.is_offset_set()) continue;
4135
4136 // contended instance fields are handled below
4137 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4138
4139 int real_offset = 0;
4140 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4141
4142 // pack the rest of the fields
4143 switch (atype) {
4144 // Value types in static fields are handled with oops
4145 case STATIC_VALUETYPE: // Fallthrough
4146 case STATIC_OOP:
4147 real_offset = next_static_oop_offset;
4148 next_static_oop_offset += heapOopSize;
4149 break;
4150 case STATIC_BYTE:
4151 real_offset = next_static_byte_offset;
4152 next_static_byte_offset += 1;
4153 break;
4154 case STATIC_SHORT:
4155 real_offset = next_static_short_offset;
4156 next_static_short_offset += BytesPerShort;
4157 break;
4158 case STATIC_WORD:
4159 real_offset = next_static_word_offset;
4160 next_static_word_offset += BytesPerInt;
4161 break;
4162 case STATIC_DOUBLE:
4163 real_offset = next_static_double_offset;
4164 next_static_double_offset += BytesPerLong;
4165 break;
4166 case NONSTATIC_VALUETYPE:
4167 {
4168 real_offset = next_nonstatic_valuetype_offset;
4169
4170 assert(next_value_type_index < large_value_count, "Incorrect number of value alloc types");
4171 ValueKlass* vklass = nonstatic_value_type_klasses[next_value_type_index++];
4172 if (vklass->contains_oops()) { // add flatten oop maps
4173 int diff = real_offset - vklass->first_field_offset();
4174 const OopMapBlock* map = vklass->start_of_nonstatic_oop_maps();
4175 const OopMapBlock* const last_map = map + vklass->nonstatic_oop_map_count();
4176 while (map < last_map) {
4177 nonstatic_oop_maps->add(map->offset() + diff, map->count());
4178 map++;
4179 }
4180 }
4181 next_nonstatic_valuetype_offset += vklass->raw_value_byte_size();
4182 }
4183 break;
4184 case NONSTATIC_OOP:
4185 if( nonstatic_oop_space_count > 0 ) {
4186 real_offset = nonstatic_oop_space_offset;
4187 nonstatic_oop_space_offset += heapOopSize;
4188 nonstatic_oop_space_count -= 1;
4189 } else {
4190 real_offset = next_nonstatic_oop_offset;
4191 next_nonstatic_oop_offset += heapOopSize;
4192 }
4193 nonstatic_oop_maps->add(real_offset, 1);
4194 break;
4195 case NONSTATIC_BYTE:
4196 if( nonstatic_byte_space_count > 0 ) {
4197 real_offset = nonstatic_byte_space_offset;
4198 nonstatic_byte_space_offset += 1;
4199 nonstatic_byte_space_count -= 1;
4200 } else {
4201 real_offset = next_nonstatic_byte_offset;
4202 next_nonstatic_byte_offset += 1;
4203 }
4204 break;
4205 case NONSTATIC_SHORT:
4206 if( nonstatic_short_space_count > 0 ) {
4207 real_offset = nonstatic_short_space_offset;
4208 nonstatic_short_space_offset += BytesPerShort;
4209 nonstatic_short_space_count -= 1;
4210 } else {
4211 real_offset = next_nonstatic_short_offset;
4212 next_nonstatic_short_offset += BytesPerShort;
4213 }
4214 break;
4215 case NONSTATIC_WORD:
4216 if( nonstatic_word_space_count > 0 ) {
4217 real_offset = nonstatic_word_space_offset;
4218 nonstatic_word_space_offset += BytesPerInt;
4219 nonstatic_word_space_count -= 1;
4220 } else {
4221 real_offset = next_nonstatic_word_offset;
4222 next_nonstatic_word_offset += BytesPerInt;
4223 }
4224 break;
4225 case NONSTATIC_DOUBLE:
4226 real_offset = next_nonstatic_double_offset;
4227 next_nonstatic_double_offset += BytesPerLong;
4228 break;
4229 default:
4230 ShouldNotReachHere();
4231 }
4232 fs.set_offset(real_offset);
4233 }
4234
4235
4236 // Handle the contended cases.
4237 //
4238 // Each contended field should not intersect the cache line with another contended field.
4239 // In the absence of alignment information, we end up with pessimistically separating
4240 // the fields with full-width padding.
4241 //
4242 // Additionally, this should not break alignment for the fields, so we round the alignment up
4243 // for each field.
4244 if (nonstatic_contended_count > 0) {
4245
4246 // if there is at least one contended field, we need to have pre-padding for them
4247 next_nonstatic_padded_offset += ContendedPaddingWidth;
4248
4249 // collect all contended groups
4250 ResourceBitMap bm(cp->size());
4251 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4252 // skip already laid out fields
4253 if (fs.is_offset_set()) continue;
4254
4255 if (fs.is_contended()) {
4256 bm.set_bit(fs.contended_group());
4257 }
4258 }
4259
4260 int current_group = -1;
4261 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4262
4263 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4264
4265 // skip already laid out fields
4266 if (fs.is_offset_set()) continue;
4267
4268 // skip non-contended fields and fields from different group
4269 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4270
4271 // handle statics below
4272 if (fs.access_flags().is_static()) continue;
4273
4274 int real_offset = 0;
4275 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4276
4277 switch (atype) {
4278 case NONSTATIC_BYTE:
4279 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
4280 real_offset = next_nonstatic_padded_offset;
4281 next_nonstatic_padded_offset += 1;
4282 break;
4283
4284 case NONSTATIC_SHORT:
4285 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
4286 real_offset = next_nonstatic_padded_offset;
4287 next_nonstatic_padded_offset += BytesPerShort;
4288 break;
4289
4290 case NONSTATIC_WORD:
4291 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4292 real_offset = next_nonstatic_padded_offset;
4293 next_nonstatic_padded_offset += BytesPerInt;
4294 break;
4295
4296 case NONSTATIC_DOUBLE:
4297 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4298 real_offset = next_nonstatic_padded_offset;
4299 next_nonstatic_padded_offset += BytesPerLong;
4300 break;
4301
4302 // Value types in static fields are handled with oops
4303 case NONSTATIC_VALUETYPE:
4304 throwValueTypeLimitation(THREAD_AND_LOCATION,
4305 "@Contended annotation not supported for value types yet", fs.name(), fs.signature());
4306 return;
4307
4308 case NONSTATIC_OOP:
4309 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4310 real_offset = next_nonstatic_padded_offset;
4311 next_nonstatic_padded_offset += heapOopSize;
4312 nonstatic_oop_maps->add(real_offset, 1);
4313 break;
4314
4315 default:
4316 ShouldNotReachHere();
4317 }
4318
4319 if (fs.contended_group() == 0) {
4320 // Contended group defines the equivalence class over the fields:
4321 // the fields within the same contended group are not inter-padded.
4322 // The only exception is default group, which does not incur the
4323 // equivalence, and so requires intra-padding.
4324 next_nonstatic_padded_offset += ContendedPaddingWidth;
4325 }
4326
4327 fs.set_offset(real_offset);
4328 } // for
4329
4330 // Start laying out the next group.
4331 // Note that this will effectively pad the last group in the back;
4332 // this is expected to alleviate memory contention effects for
4333 // subclass fields and/or adjacent object.
4334 // If this was the default group, the padding is already in place.
4335 if (current_group != 0) {
4336 next_nonstatic_padded_offset += ContendedPaddingWidth;
4337 }
4338 }
4339
4340 // handle static fields
4341 }
4342
4343 // Entire class is contended, pad in the back.
4344 // This helps to alleviate memory contention effects for subclass fields
4345 // and/or adjacent object.
4346 if (is_contended_class) {
4347 assert(!is_value_type() && !is_derive_value_type(), "@Contended not supported for value types yet");
4348 next_nonstatic_padded_offset += ContendedPaddingWidth;
4349 }
4350
4351 int notaligned_nonstatic_fields_end;
4352 if (has_nonstatic_value_fields) {
4353 notaligned_nonstatic_fields_end = next_nonstatic_valuetype_offset;
4354 } else {
4355 notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4356 }
4357
4358 int nonstatic_field_sz_align = heapOopSize;
4359 if (is_value_type() || is_derive_value_type()) {
4360 if ((notaligned_nonstatic_fields_end - nonstatic_fields_start) > heapOopSize) {
4361 nonstatic_field_sz_align = BytesPerLong; // value copy of fields only uses jlong copy
4362 }
4363 }
4364 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, nonstatic_field_sz_align);
4365 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4366 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
4367
4368 int static_field_size = (static_fields_end -
4369 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4370 nonstatic_field_size = nonstatic_field_size +
4371 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4372
4373 int instance_size = align_object_size(instance_end / wordSize);
4374
4375 assert(instance_size == align_object_size(align_size_up(
4376 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize)
4377 + initial_value_type_padding, wordSize) / wordSize), "consistent layout helper value");
4378
4379
4380 // Invariant: nonstatic_field end/start should only change if there are
4381 // nonstatic fields in the class, or if the class is contended. We compare
4382 // against the non-aligned value, so that end alignment will not fail the
4383 // assert without actually having the fields.
4384 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4385 is_contended_class ||
4386 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4387
4388 // Number of non-static oop map blocks allocated at end of klass.
4389 nonstatic_oop_maps->compact(THREAD);
4390
4391 #ifndef PRODUCT
4392 if ((PrintFieldLayout && !is_value_type()) ||
4393 (PrintValueLayout && (is_value_type() || has_nonstatic_value_fields))) {
4394 print_field_layout(_class_name,
4395 _fields,
4396 cp,
4397 instance_size,
4398 nonstatic_fields_start,
4399 nonstatic_fields_end,
4400 static_fields_end);
4401 nonstatic_oop_maps->print_on(tty);
4402 tty->print("\n");
4403 }
4404
4405 #endif
4406 // Pass back information needed for InstanceKlass creation
4407 info->oop_map_blocks = nonstatic_oop_maps;
4408 info->instance_size = instance_size;
4409 info->static_field_size = static_field_size;
4410 info->nonstatic_field_size = nonstatic_field_size;
4411 info->has_nonstatic_fields = has_nonstatic_fields;
4412 }
4413
4414 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4415 assert(ik != NULL, "invariant");
4416
4417 const Klass* const super = ik->super();
4418
4419 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4420 // in which case we don't have to register objects as finalizable
4421 if (!_has_empty_finalizer) {
4422 if (_has_finalizer ||
4423 (super != NULL && super->has_finalizer())) {
4424 ik->set_has_finalizer();
4425 }
4426 }
4427
4428 #ifdef ASSERT
4429 bool f = false;
4430 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4431 vmSymbols::void_method_signature());
4432 if (m != NULL && !m->is_empty_method()) {
4433 f = true;
4434 }
4435
4436 // Spec doesn't prevent agent from redefinition of empty finalizer.
4437 // Despite the fact that it's generally bad idea and redefined finalizer
4438 // will not work as expected we shouldn't abort vm in this case
4439 if (!ik->has_redefined_this_or_super()) {
4440 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4441 }
4442 #endif
4443
4444 // Check if this klass supports the java.lang.Cloneable interface
4445 if (SystemDictionary::Cloneable_klass_loaded()) {
4446 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4447 ik->set_is_cloneable();
4448 }
4449 }
4450
4451 // Check if this klass has a vanilla default constructor
4452 if (super == NULL) {
4453 // java.lang.Object has empty default constructor
4454 ik->set_has_vanilla_constructor();
4455 } else {
4456 if (super->has_vanilla_constructor() &&
4457 _has_vanilla_constructor) {
4458 ik->set_has_vanilla_constructor();
4459 }
4460 #ifdef ASSERT
4461 bool v = false;
4462 if (super->has_vanilla_constructor()) {
4463 const Method* const constructor =
4464 ik->find_method(vmSymbols::object_initializer_name(),
4465 vmSymbols::void_method_signature());
4466 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4467 v = true;
4468 }
4469 }
4470 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4471 #endif
4472 }
4473
4474 // If it cannot be fast-path allocated, set a bit in the layout helper.
4475 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4476 assert(ik->size_helper() > 0, "layout_helper is initialized");
4477 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4478 || ik->is_abstract() || ik->is_interface()
4479 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4480 || ik->size_helper() >= FastAllocateSizeLimit) {
4481 // Forbid fast-path allocation.
4482 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4483 ik->set_layout_helper(lh);
4484 }
4485 }
4486
4487 // Attach super classes and interface classes to class loader data
4488 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4489 TRAPS) {
4490 assert(defined_klass != NULL, "invariant");
4491
4492 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4493 if (defining_loader_data->is_the_null_class_loader_data()) {
4494 // Dependencies to null class loader data are implicit.
4495 return;
4496 } else {
4497 // add super class dependency
4498 Klass* const super = defined_klass->super();
4499 if (super != NULL) {
4500 defining_loader_data->record_dependency(super, CHECK);
4501 }
4502
4503 // add super interface dependencies
4504 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4505 if (local_interfaces != NULL) {
4506 const int length = local_interfaces->length();
4507 for (int i = 0; i < length; i++) {
4508 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4509 }
4510 }
4511
4512 for (FieldStream st((InstanceKlass*)defined_klass, false, false); !st.eos(); st.next()) {
4513 Symbol* signature = st.signature();
4514 if (signature->starts_with("Q")) {
4515 Klass* klass = SystemDictionary::resolve_or_fail(signature,
4516 Handle(THREAD, defined_klass->class_loader()),
4517 Handle(THREAD, defined_klass->protection_domain()), true, CHECK);
4518 assert(klass != NULL, "Sanity check");
4519 assert(klass->access_flags().is_value_type(), "Value type expected");
4520 defining_loader_data->record_dependency(klass, CHECK);
4521 }
4522 }
4523 }
4524 }
4525
4526 // utility methods for appending an array with check for duplicates
4527
4528 static void append_interfaces(GrowableArray<Klass*>* result,
4529 const Array<Klass*>* const ifs) {
4530 // iterate over new interfaces
4531 for (int i = 0; i < ifs->length(); i++) {
4532 Klass* const e = ifs->at(i);
4533 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4534 // add new interface
4535 result->append_if_missing(e);
4536 }
4537 }
4538
4539 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4540 Array<Klass*>* local_ifs,
4541 ClassLoaderData* loader_data,
4542 TRAPS) {
4543 assert(local_ifs != NULL, "invariant");
4544 assert(loader_data != NULL, "invariant");
4545
4546 // Compute maximum size for transitive interfaces
4547 int max_transitive_size = 0;
4548 int super_size = 0;
4549 // Add superclass transitive interfaces size
4550 if (super != NULL) {
4551 super_size = super->transitive_interfaces()->length();
4552 max_transitive_size += super_size;
4553 }
4554 // Add local interfaces' super interfaces
4555 const int local_size = local_ifs->length();
4556 for (int i = 0; i < local_size; i++) {
4557 Klass* const l = local_ifs->at(i);
4558 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4559 }
4560 // Finally add local interfaces
4561 max_transitive_size += local_size;
4562 // Construct array
4563 if (max_transitive_size == 0) {
4564 // no interfaces, use canonicalized array
4565 return Universe::the_empty_klass_array();
4566 } else if (max_transitive_size == super_size) {
4567 // no new local interfaces added, share superklass' transitive interface array
4568 return super->transitive_interfaces();
4569 } else if (max_transitive_size == local_size) {
4570 // only local interfaces added, share local interface array
4571 return local_ifs;
4572 } else {
4573 ResourceMark rm;
4574 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4575
4576 // Copy down from superclass
4577 if (super != NULL) {
4578 append_interfaces(result, super->transitive_interfaces());
4579 }
4580
4581 // Copy down from local interfaces' superinterfaces
4582 for (int i = 0; i < local_size; i++) {
4583 Klass* const l = local_ifs->at(i);
4584 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4585 }
4586 // Finally add local interfaces
4587 append_interfaces(result, local_ifs);
4588
4589 // length will be less than the max_transitive_size if duplicates were removed
4590 const int length = result->length();
4591 assert(length <= max_transitive_size, "just checking");
4592 Array<Klass*>* const new_result =
4593 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4594 for (int i = 0; i < length; i++) {
4595 Klass* const e = result->at(i);
4596 assert(e != NULL, "just checking");
4597 new_result->at_put(i, e);
4598 }
4599 return new_result;
4600 }
4601 }
4602
4603 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4604 assert(this_klass != NULL, "invariant");
4605 const Klass* const super = this_klass->super();
4606 if (super != NULL) {
4607
4608 // If the loader is not the boot loader then throw an exception if its
4609 // superclass is in package jdk.internal.reflect and its loader is not a
4610 // special reflection class loader
4611 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4612 assert(super->is_instance_klass(), "super is not instance klass");
4613 PackageEntry* super_package = super->package();
4614 if (super_package != NULL &&
4615 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4616 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4617 ResourceMark rm(THREAD);
4618 Exceptions::fthrow(
4619 THREAD_AND_LOCATION,
4620 vmSymbols::java_lang_IllegalAccessError(),
4621 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4622 this_klass->external_name(),
4623 this_klass->class_loader_data()->loader_name(),
4624 super->external_name());
4625 return;
4626 }
4627 }
4628
4629 Reflection::VerifyClassAccessResults vca_result =
4630 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4631 if (vca_result != Reflection::ACCESS_OK) {
4632 ResourceMark rm(THREAD);
4633 char* msg = Reflection::verify_class_access_msg(this_klass,
4634 InstanceKlass::cast(super),
4635 vca_result);
4636 if (msg == NULL) {
4637 Exceptions::fthrow(
4638 THREAD_AND_LOCATION,
4639 vmSymbols::java_lang_IllegalAccessError(),
4640 "class %s cannot access its superclass %s",
4641 this_klass->external_name(),
4642 super->external_name());
4643 } else {
4644 // Add additional message content.
4645 Exceptions::fthrow(
4646 THREAD_AND_LOCATION,
4647 vmSymbols::java_lang_IllegalAccessError(),
4648 "superclass access check failed: %s",
4649 msg);
4650 }
4651 }
4652 }
4653 }
4654
4655
4656 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4657 assert(this_klass != NULL, "invariant");
4658 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4659 const int lng = local_interfaces->length();
4660 for (int i = lng - 1; i >= 0; i--) {
4661 Klass* const k = local_interfaces->at(i);
4662 assert (k != NULL && k->is_interface(), "invalid interface");
4663 Reflection::VerifyClassAccessResults vca_result =
4664 Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false);
4665 if (vca_result != Reflection::ACCESS_OK) {
4666 ResourceMark rm(THREAD);
4667 char* msg = Reflection::verify_class_access_msg(this_klass,
4668 InstanceKlass::cast(k),
4669 vca_result);
4670 if (msg == NULL) {
4671 Exceptions::fthrow(
4672 THREAD_AND_LOCATION,
4673 vmSymbols::java_lang_IllegalAccessError(),
4674 "class %s cannot access its superinterface %s",
4675 this_klass->external_name(),
4676 k->external_name());
4677 } else {
4678 // Add additional message content.
4679 Exceptions::fthrow(
4680 THREAD_AND_LOCATION,
4681 vmSymbols::java_lang_IllegalAccessError(),
4682 "superinterface check failed: %s",
4683 msg);
4684 }
4685 }
4686 }
4687 }
4688
4689
4690 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4691 assert(this_klass != NULL, "invariant");
4692 const Array<Method*>* const methods = this_klass->methods();
4693 const int num_methods = methods->length();
4694
4695 // go thru each method and check if it overrides a final method
4696 for (int index = 0; index < num_methods; index++) {
4697 const Method* const m = methods->at(index);
4698
4699 // skip private, static, and <init> methods
4700 if ((!m->is_private() && !m->is_static()) &&
4701 (m->name() != vmSymbols::object_initializer_name())) {
4702
4703 const Symbol* const name = m->name();
4704 const Symbol* const signature = m->signature();
4705 const Klass* k = this_klass->super();
4706 const Method* super_m = NULL;
4707 while (k != NULL) {
4708 // skip supers that don't have final methods.
4709 if (k->has_final_method()) {
4710 // lookup a matching method in the super class hierarchy
4711 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4712 if (super_m == NULL) {
4713 break; // didn't find any match; get out
4714 }
4715
4716 if (super_m->is_final() && !super_m->is_static() &&
4717 // matching method in super is final, and not static
4718 (Reflection::verify_field_access(this_klass,
4719 super_m->method_holder(),
4720 super_m->method_holder(),
4721 super_m->access_flags(), false))
4722 // this class can access super final method and therefore override
4723 ) {
4724 ResourceMark rm(THREAD);
4725 Exceptions::fthrow(
4726 THREAD_AND_LOCATION,
4727 vmSymbols::java_lang_VerifyError(),
4728 "class %s overrides final method %s.%s%s",
4729 this_klass->external_name(),
4730 super_m->method_holder()->external_name(),
4731 name->as_C_string(),
4732 signature->as_C_string()
4733 );
4734 return;
4735 }
4736
4737 // continue to look from super_m's holder's super.
4738 k = super_m->method_holder()->super();
4739 continue;
4740 }
4741
4742 k = k->super();
4743 }
4744 }
4745 }
4746 }
4747
4748
4749 // assumes that this_klass is an interface
4750 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4751 assert(this_klass != NULL, "invariant");
4752 assert(this_klass->is_interface(), "not an interface");
4753 const Array<Method*>* methods = this_klass->methods();
4754 const int num_methods = methods->length();
4755
4756 for (int index = 0; index < num_methods; index++) {
4757 const Method* const m = methods->at(index);
4758 // if m is static and not the init method, throw a verify error
4759 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4760 ResourceMark rm(THREAD);
4761 Exceptions::fthrow(
4762 THREAD_AND_LOCATION,
4763 vmSymbols::java_lang_VerifyError(),
4764 "Illegal static method %s in interface %s",
4765 m->name()->as_C_string(),
4766 this_klass->external_name()
4767 );
4768 return;
4769 }
4770 }
4771 }
4772
4773 // utility methods for format checking
4774
4775 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4776 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4777 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4778 if (is_module) {
4779 ResourceMark rm(THREAD);
4780 Exceptions::fthrow(
4781 THREAD_AND_LOCATION,
4782 vmSymbols::java_lang_NoClassDefFoundError(),
4783 "%s is not a class because access_flag ACC_MODULE is set",
4784 _class_name->as_C_string());
4785 return;
4786 }
4787
4788 if (!_need_verify) { return; }
4789
4790 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4791 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4792 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4793 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4794 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4795 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4796 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4797
4798 if ((is_abstract && is_final) ||
4799 (is_interface && !is_abstract) ||
4800 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4801 (!is_interface && major_gte_15 && is_annotation)) {
4802 ResourceMark rm(THREAD);
4803 Exceptions::fthrow(
4804 THREAD_AND_LOCATION,
4805 vmSymbols::java_lang_ClassFormatError(),
4806 "Illegal class modifiers in class %s: 0x%X",
4807 _class_name->as_C_string(), flags
4808 );
4809 return;
4810 }
4811 }
4812
4813 static bool has_illegal_visibility(jint flags) {
4814 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4815 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4816 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4817
4818 return ((is_public && is_protected) ||
4819 (is_public && is_private) ||
4820 (is_protected && is_private));
4821 }
4822
4823 static bool is_supported_version(u2 major, u2 minor){
4824 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4825 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4826 (major <= max_version) &&
4827 ((major != max_version) ||
4828 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4829 }
4830
4831 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4832 bool is_interface,
4833 TRAPS) const {
4834 if (!_need_verify) { return; }
4835
4836 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4837 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4838 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4839 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4840 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4841 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4842 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4843 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4844 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4845
4846 bool is_illegal = false;
4847
4848 if (is_interface) {
4849 if (!is_public || !is_static || !is_final || is_private ||
4850 is_protected || is_volatile || is_transient ||
4851 (major_gte_15 && is_enum)) {
4852 is_illegal = true;
4853 }
4854 } else { // not interface
4855 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4856 is_illegal = true;
4857 }
4858 }
4859
4860 if (is_illegal) {
4861 ResourceMark rm(THREAD);
4862 Exceptions::fthrow(
4863 THREAD_AND_LOCATION,
4864 vmSymbols::java_lang_ClassFormatError(),
4865 "Illegal field modifiers in class %s: 0x%X",
4866 _class_name->as_C_string(), flags);
4867 return;
4868 }
4869 }
4870
4871 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4872 bool is_interface,
4873 const Symbol* name,
4874 TRAPS) const {
4875 if (!_need_verify) { return; }
4876
4877 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4878 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4879 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4880 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4881 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4882 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4883 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4884 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4885 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4886 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4887 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4888 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4889 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4890
4891 bool is_illegal = false;
4892
4893 if (is_interface) {
4894 if (major_gte_8) {
4895 // Class file version is JAVA_8_VERSION or later Methods of
4896 // interfaces may set any of the flags except ACC_PROTECTED,
4897 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4898 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4899 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4900 (is_native || is_protected || is_final || is_synchronized) ||
4901 // If a specific method of a class or interface has its
4902 // ACC_ABSTRACT flag set, it must not have any of its
4903 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4904 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4905 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4906 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4907 (is_abstract && (is_private || is_static || is_strict))) {
4908 is_illegal = true;
4909 }
4910 } else if (major_gte_15) {
4911 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4912 if (!is_public || is_private || is_protected || is_static || is_final ||
4913 is_synchronized || is_native || !is_abstract || is_strict) {
4914 is_illegal = true;
4915 }
4916 } else {
4917 // Class file version is pre-JAVA_1_5_VERSION
4918 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4919 is_illegal = true;
4920 }
4921 }
4922 } else { // not interface
4923 if (has_illegal_visibility(flags)) {
4924 is_illegal = true;
4925 } else {
4926 if (is_initializer) {
4927 if (is_static || is_final || is_synchronized || is_native ||
4928 is_abstract || (major_gte_15 && is_bridge)) {
4929 is_illegal = true;
4930 }
4931 } else { // not initializer
4932 if (is_abstract) {
4933 if ((is_final || is_native || is_private || is_static ||
4934 (major_gte_15 && (is_synchronized || is_strict)))) {
4935 is_illegal = true;
4936 }
4937 }
4938 }
4939 }
4940 }
4941
4942 if (is_illegal) {
4943 ResourceMark rm(THREAD);
4944 Exceptions::fthrow(
4945 THREAD_AND_LOCATION,
4946 vmSymbols::java_lang_ClassFormatError(),
4947 "Method %s in class %s has illegal modifiers: 0x%X",
4948 name->as_C_string(), _class_name->as_C_string(), flags);
4949 return;
4950 }
4951 }
4952
4953 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4954 int length,
4955 TRAPS) const {
4956 assert(_need_verify, "only called when _need_verify is true");
4957 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4958 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4959 }
4960 }
4961
4962 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4963 // In class names, '/' separates unqualified names. This is verified in this function also.
4964 // Method names also may not contain the characters '<' or '>', unless <init>
4965 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4966 // method. Because these names have been checked as special cases before
4967 // calling this method in verify_legal_method_name.
4968 //
4969 // This method is also called from the modular system APIs in modules.cpp
4970 // to verify the validity of module and package names.
4971 bool ClassFileParser::verify_unqualified_name(const char* name,
4972 unsigned int length,
4973 int type) {
4974 for (const char* p = name; p != name + length;) {
4975 jchar ch = *p;
4976 if (ch < 128) {
4977 if (ch == '.' || ch == ';' || ch == '[' ) {
4978 return false; // do not permit '.', ';', or '['
4979 }
4980 if (ch == '/') {
4981 // check for '//' or leading or trailing '/' which are not legal
4982 // unqualified name must not be empty
4983 if (type == ClassFileParser::LegalClass) {
4984 if (p == name || p+1 >= name+length || *(p+1) == '/') {
4985 return false;
4986 }
4987 } else {
4988 return false; // do not permit '/' unless it's class name
4989 }
4990 }
4991 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
4992 return false; // do not permit '<' or '>' in method names
4993 }
4994 p++;
4995 } else {
4996 char* tmp_p = UTF8::next(p, &ch);
4997 p = tmp_p;
4998 }
4999 }
5000 return true;
5001 }
5002
5003 // Take pointer to a string. Skip over the longest part of the string that could
5004 // be taken as a fieldname. Allow '/' if slash_ok is true.
5005 // Return a pointer to just past the fieldname.
5006 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5007 // being true, we saw consecutive slashes (meaning we were looking for a
5008 // qualified path but found something that was badly-formed).
5009 static const char* skip_over_field_name(const char* name,
5010 bool slash_ok,
5011 unsigned int length) {
5012 const char* p;
5013 jboolean last_is_slash = false;
5014 jboolean not_first_ch = false;
5015
5016 for (p = name; p != name + length; not_first_ch = true) {
5017 const char* old_p = p;
5018 jchar ch = *p;
5019 if (ch < 128) {
5020 p++;
5021 // quick check for ascii
5022 if ((ch >= 'a' && ch <= 'z') ||
5023 (ch >= 'A' && ch <= 'Z') ||
5024 (ch == '_' || ch == '$') ||
5025 (not_first_ch && ch >= '0' && ch <= '9')) {
5026 last_is_slash = false;
5027 continue;
5028 }
5029 if (slash_ok && ch == '/') {
5030 if (last_is_slash) {
5031 return NULL; // Don't permit consecutive slashes
5032 }
5033 last_is_slash = true;
5034 continue;
5035 }
5036 }
5037 else {
5038 jint unicode_ch;
5039 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5040 p = tmp_p;
5041 last_is_slash = false;
5042 // Check if ch is Java identifier start or is Java identifier part
5043 // 4672820: call java.lang.Character methods directly without generating separate tables.
5044 EXCEPTION_MARK;
5045
5046 // return value
5047 JavaValue result(T_BOOLEAN);
5048 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
5049 JavaCallArguments args;
5050 args.push_int(unicode_ch);
5051
5052 // public static boolean isJavaIdentifierStart(char ch);
5053 JavaCalls::call_static(&result,
5054 SystemDictionary::Character_klass(),
5055 vmSymbols::isJavaIdentifierStart_name(),
5056 vmSymbols::int_bool_signature(),
5057 &args,
5058 THREAD);
5059
5060 if (HAS_PENDING_EXCEPTION) {
5061 CLEAR_PENDING_EXCEPTION;
5062 return 0;
5063 }
5064 if (result.get_jboolean()) {
5065 continue;
5066 }
5067
5068 if (not_first_ch) {
5069 // public static boolean isJavaIdentifierPart(char ch);
5070 JavaCalls::call_static(&result,
5071 SystemDictionary::Character_klass(),
5072 vmSymbols::isJavaIdentifierPart_name(),
5073 vmSymbols::int_bool_signature(),
5074 &args,
5075 THREAD);
5076
5077 if (HAS_PENDING_EXCEPTION) {
5078 CLEAR_PENDING_EXCEPTION;
5079 return 0;
5080 }
5081
5082 if (result.get_jboolean()) {
5083 continue;
5084 }
5085 }
5086 }
5087 return (not_first_ch) ? old_p : NULL;
5088 }
5089 return (not_first_ch) ? p : NULL;
5090 }
5091
5092 // Take pointer to a string. Skip over the longest part of the string that could
5093 // be taken as a field signature. Allow "void" if void_ok.
5094 // Return a pointer to just past the signature.
5095 // Return NULL if no legal signature is found.
5096 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5097 bool void_ok,
5098 unsigned int length,
5099 TRAPS) const {
5100 unsigned int array_dim = 0;
5101 while (length > 0) {
5102 switch (signature[0]) {
5103 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5104 case JVM_SIGNATURE_BOOLEAN:
5105 case JVM_SIGNATURE_BYTE:
5106 case JVM_SIGNATURE_CHAR:
5107 case JVM_SIGNATURE_SHORT:
5108 case JVM_SIGNATURE_INT:
5109 case JVM_SIGNATURE_FLOAT:
5110 case JVM_SIGNATURE_LONG:
5111 case JVM_SIGNATURE_DOUBLE:
5112 return signature + 1;
5113 case JVM_SIGNATURE_CLASS:
5114 case JVM_SIGNATURE_VALUE_CLASS: {
5115 if (_major_version < JAVA_1_5_VERSION) {
5116 // Skip over the class name if one is there
5117 const char* const p = skip_over_field_name(signature + 1, true, --length);
5118
5119 // The next character better be a semicolon
5120 if (p && (p - signature) > 1 && p[0] == ';') {
5121 return p + 1;
5122 }
5123 }
5124 else {
5125 // Skip leading 'L' and ignore first appearance of ';'
5126 length--;
5127 signature++;
5128 char* c = strchr((char*) signature, ';');
5129 // Format check signature
5130 if (c != NULL) {
5131 ResourceMark rm(THREAD);
5132 int newlen = c - (char*) signature;
5133 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
5134 strncpy(sig, signature, newlen);
5135 sig[newlen] = '\0';
5136
5137 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
5138 if (!legal) {
5139 classfile_parse_error("Class name contains illegal character "
5140 "in descriptor in class file %s",
5141 CHECK_0);
5142 return NULL;
5143 }
5144 return signature + newlen + 1;
5145 }
5146 }
5147 return NULL;
5148 }
5149 case JVM_SIGNATURE_ARRAY:
5150 array_dim++;
5151 if (array_dim > 255) {
5152 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5153 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5154 }
5155 // The rest of what's there better be a legal signature
5156 signature++;
5157 length--;
5158 void_ok = false;
5159 break;
5160 default:
5161 return NULL;
5162 }
5163 }
5164 return NULL;
5165 }
5166
5167 // Checks if name is a legal class name.
5168 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5169 if (!_need_verify || _relax_verify) { return; }
5170
5171 char buf[fixed_buffer_size];
5172 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5173 unsigned int length = name->utf8_length();
5174 bool legal = false;
5175
5176 if (length > 0) {
5177 const char* p;
5178 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5179 p = skip_over_field_signature(bytes, false, length, CHECK);
5180 legal = (p != NULL) && ((p - bytes) == (int)length);
5181 } else if (_major_version < JAVA_1_5_VERSION) {
5182 if (bytes[0] != '<') {
5183 p = skip_over_field_name(bytes, true, length);
5184 legal = (p != NULL) && ((p - bytes) == (int)length);
5185 }
5186 } else {
5187 // 4900761: relax the constraints based on JSR202 spec
5188 // Class names may be drawn from the entire Unicode character set.
5189 // Identifiers between '/' must be unqualified names.
5190 // The utf8 string has been verified when parsing cpool entries.
5191 legal = verify_unqualified_name(bytes, length, LegalClass);
5192 }
5193 }
5194 if (!legal) {
5195 ResourceMark rm(THREAD);
5196 assert(_class_name != NULL, "invariant");
5197 Exceptions::fthrow(
5198 THREAD_AND_LOCATION,
5199 vmSymbols::java_lang_ClassFormatError(),
5200 "Illegal class name \"%s\" in class file %s", bytes,
5201 _class_name->as_C_string()
5202 );
5203 return;
5204 }
5205 }
5206
5207 // Checks if name is a legal field name.
5208 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5209 if (!_need_verify || _relax_verify) { return; }
5210
5211 char buf[fixed_buffer_size];
5212 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5213 unsigned int length = name->utf8_length();
5214 bool legal = false;
5215
5216 if (length > 0) {
5217 if (_major_version < JAVA_1_5_VERSION) {
5218 if (bytes[0] != '<') {
5219 const char* p = skip_over_field_name(bytes, false, length);
5220 legal = (p != NULL) && ((p - bytes) == (int)length);
5221 }
5222 } else {
5223 // 4881221: relax the constraints based on JSR202 spec
5224 legal = verify_unqualified_name(bytes, length, LegalField);
5225 }
5226 }
5227
5228 if (!legal) {
5229 ResourceMark rm(THREAD);
5230 assert(_class_name != NULL, "invariant");
5231 Exceptions::fthrow(
5232 THREAD_AND_LOCATION,
5233 vmSymbols::java_lang_ClassFormatError(),
5234 "Illegal field name \"%s\" in class %s", bytes,
5235 _class_name->as_C_string()
5236 );
5237 return;
5238 }
5239 }
5240
5241 // Checks if name is a legal method name.
5242 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5243 if (!_need_verify || _relax_verify) { return; }
5244
5245 assert(name != NULL, "method name is null");
5246 char buf[fixed_buffer_size];
5247 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5248 unsigned int length = name->utf8_length();
5249 bool legal = false;
5250
5251 if (length > 0) {
5252 if (bytes[0] == '<') {
5253 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5254 legal = true;
5255 }
5256 } else if (_major_version < JAVA_1_5_VERSION) {
5257 const char* p;
5258 p = skip_over_field_name(bytes, false, length);
5259 legal = (p != NULL) && ((p - bytes) == (int)length);
5260 } else {
5261 // 4881221: relax the constraints based on JSR202 spec
5262 legal = verify_unqualified_name(bytes, length, LegalMethod);
5263 }
5264 }
5265
5266 if (!legal) {
5267 ResourceMark rm(THREAD);
5268 assert(_class_name != NULL, "invariant");
5269 Exceptions::fthrow(
5270 THREAD_AND_LOCATION,
5271 vmSymbols::java_lang_ClassFormatError(),
5272 "Illegal method name \"%s\" in class %s", bytes,
5273 _class_name->as_C_string()
5274 );
5275 return;
5276 }
5277 }
5278
5279
5280 // Checks if signature is a legal field signature.
5281 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5282 const Symbol* signature,
5283 TRAPS) const {
5284 if (!_need_verify) { return; }
5285
5286 char buf[fixed_buffer_size];
5287 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5288 const unsigned int length = signature->utf8_length();
5289 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5290
5291 if (p == NULL || (p - bytes) != (int)length) {
5292 throwIllegalSignature("Field", name, signature, CHECK);
5293 }
5294 }
5295
5296 // Checks if signature is a legal method signature.
5297 // Returns number of parameters
5298 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5299 const Symbol* signature,
5300 TRAPS) const {
5301 if (!_need_verify) {
5302 // make sure caller's args_size will be less than 0 even for non-static
5303 // method so it will be recomputed in compute_size_of_parameters().
5304 return -2;
5305 }
5306
5307 // Class initializers cannot have args for class format version >= 51.
5308 if (name == vmSymbols::class_initializer_name() &&
5309 signature != vmSymbols::void_method_signature() &&
5310 _major_version >= JAVA_7_VERSION) {
5311 throwIllegalSignature("Method", name, signature, CHECK_0);
5312 return 0;
5313 }
5314
5315 unsigned int args_size = 0;
5316 char buf[fixed_buffer_size];
5317 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5318 unsigned int length = signature->utf8_length();
5319 const char* nextp;
5320
5321 // The first character must be a '('
5322 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5323 length--;
5324 // Skip over legal field signatures
5325 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5326 while ((length > 0) && (nextp != NULL)) {
5327 args_size++;
5328 if (p[0] == 'J' || p[0] == 'D') {
5329 args_size++;
5330 }
5331 length -= nextp - p;
5332 p = nextp;
5333 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5334 }
5335 // The first non-signature thing better be a ')'
5336 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5337 length--;
5338 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5339 // All internal methods must return void
5340 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5341 return args_size;
5342 }
5343 } else {
5344 // Now we better just have a return value
5345 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5346 if (nextp && ((int)length == (nextp - p))) {
5347 return args_size;
5348 }
5349 }
5350 }
5351 }
5352 // Report error
5353 throwIllegalSignature("Method", name, signature, CHECK_0);
5354 return 0;
5355 }
5356
5357 int ClassFileParser::static_field_size() const {
5358 assert(_field_info != NULL, "invariant");
5359 return _field_info->static_field_size;
5360 }
5361
5362 int ClassFileParser::total_oop_map_count() const {
5363 assert(_field_info != NULL, "invariant");
5364 return _field_info->oop_map_blocks->nonstatic_oop_map_count;
5365 }
5366
5367 jint ClassFileParser::layout_size() const {
5368 assert(_field_info != NULL, "invariant");
5369 return _field_info->instance_size;
5370 }
5371
5372 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5373 const Array<Method*>* methods) {
5374 assert(ik != NULL, "invariant");
5375 assert(methods != NULL, "invariant");
5376
5377 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5378 // (We used to do this lazily, but now we query it in Rewriter,
5379 // which is eagerly done for every method, so we might as well do it now,
5380 // when everything is fresh in memory.)
5381 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5382
5383 if (klass_id != vmSymbols::NO_SID) {
5384 for (int j = 0; j < methods->length(); ++j) {
5385 Method* method = methods->at(j);
5386 method->init_intrinsic_id();
5387
5388 if (CheckIntrinsics) {
5389 // Check if an intrinsic is defined for method 'method',
5390 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5391 if (method->intrinsic_id() != vmIntrinsics::_none &&
5392 !method->intrinsic_candidate()) {
5393 tty->print("Compiler intrinsic is defined for method [%s], "
5394 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5395 method->name_and_sig_as_C_string(),
5396 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5397 );
5398 tty->cr();
5399 DEBUG_ONLY(vm_exit(1));
5400 }
5401 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5402 // but there is no intrinsic available for it.
5403 if (method->intrinsic_candidate() &&
5404 method->intrinsic_id() == vmIntrinsics::_none) {
5405 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5406 "but no compiler intrinsic is defined for the method.%s",
5407 method->name_and_sig_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
5416 #ifdef ASSERT
5417 if (CheckIntrinsics) {
5418 // Check for orphan methods in the current class. A method m
5419 // of a class C is orphan if an intrinsic is defined for method m,
5420 // but class C does not declare m.
5421 // The check is potentially expensive, therefore it is available
5422 // only in debug builds.
5423
5424 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5425 if (vmIntrinsics::_compiledLambdaForm == id) {
5426 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5427 // generated for the JVM from a LambdaForm and therefore no method
5428 // is defined for it.
5429 continue;
5430 }
5431
5432 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5433 // Check if the current class contains a method with the same
5434 // name, flags, signature.
5435 bool match = false;
5436 for (int j = 0; j < methods->length(); ++j) {
5437 const Method* method = methods->at(j);
5438 if (method->intrinsic_id() == id) {
5439 match = true;
5440 break;
5441 }
5442 }
5443
5444 if (!match) {
5445 char buf[1000];
5446 tty->print("Compiler intrinsic is defined for method [%s], "
5447 "but the method is not available in class [%s].%s",
5448 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5449 buf, sizeof(buf)),
5450 ik->name()->as_C_string(),
5451 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5452 );
5453 tty->cr();
5454 DEBUG_ONLY(vm_exit(1));
5455 }
5456 }
5457 } // end for
5458 } // CheckIntrinsics
5459 #endif // ASSERT
5460 }
5461 }
5462
5463 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5464 if (_klass != NULL) {
5465 return _klass;
5466 }
5467
5468 InstanceKlass* const ik =
5469 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5470
5471 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5472
5473 assert(_klass == ik, "invariant");
5474
5475 ik->set_has_passed_fingerprint_check(false);
5476 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5477 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5478 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5479 // This class matches with a class saved in an AOT library
5480 ik->set_has_passed_fingerprint_check(true);
5481 } else {
5482 ResourceMark rm;
5483 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5484 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5485 }
5486 }
5487
5488 return ik;
5489 }
5490
5491 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5492 assert(ik != NULL, "invariant");
5493
5494 set_klass_to_deallocate(ik);
5495
5496 assert(_field_info != NULL, "invariant");
5497 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5498 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->nonstatic_oop_map_count,
5499 "sanity");
5500
5501 assert(ik->is_instance_klass(), "sanity");
5502 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5503
5504 // Fill in information already parsed
5505 ik->set_should_verify_class(_need_verify);
5506
5507 // Not yet: supers are done below to support the new subtype-checking fields
5508 ik->set_class_loader_data(_loader_data);
5509 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5510 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5511 assert(_fac != NULL, "invariant");
5512 ik->set_static_oop_field_count(_fac->count[STATIC_OOP] + _fac->count[STATIC_VALUETYPE]);
5513
5514 // this transfers ownership of a lot of arrays from
5515 // the parser onto the InstanceKlass*
5516 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5517
5518 // note that is not safe to use the fields in the parser from this point on
5519 assert(NULL == _cp, "invariant");
5520 assert(NULL == _fields, "invariant");
5521 assert(NULL == _methods, "invariant");
5522 assert(NULL == _inner_classes, "invariant");
5523 assert(NULL == _local_interfaces, "invariant");
5524 assert(NULL == _transitive_interfaces, "invariant");
5525 assert(NULL == _combined_annotations, "invariant");
5526
5527 if (_has_final_method) {
5528 ik->set_has_final_method();
5529 }
5530
5531 ik->copy_method_ordering(_method_ordering, CHECK);
5532 // The InstanceKlass::_methods_jmethod_ids cache
5533 // is managed on the assumption that the initial cache
5534 // size is equal to the number of methods in the class. If
5535 // that changes, then InstanceKlass::idnum_can_increment()
5536 // has to be changed accordingly.
5537 ik->set_initial_method_idnum(ik->methods()->length());
5538
5539 ik->set_name(_class_name);
5540
5541 if (is_anonymous()) {
5542 // _this_class_index is a CONSTANT_Class entry that refers to this
5543 // anonymous class itself. If this class needs to refer to its own methods or
5544 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5545 // _this_class_index. However, because this class is anonymous (it's
5546 // not stored in SystemDictionary), _this_class_index cannot be resolved
5547 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5548 // Therefore, we must eagerly resolve _this_class_index now.
5549 ik->constants()->klass_at_put(_this_class_index, ik);
5550 }
5551
5552 ik->set_minor_version(_minor_version);
5553 ik->set_major_version(_major_version);
5554 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5555 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5556
5557 if (_host_klass != NULL) {
5558 assert (ik->is_anonymous(), "should be the same");
5559 ik->set_host_klass(_host_klass);
5560 }
5561
5562 // Set PackageEntry for this_klass
5563 oop cl = ik->class_loader();
5564 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5565 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5566 ik->set_package(cld, CHECK);
5567
5568 const Array<Method*>* const methods = ik->methods();
5569 assert(methods != NULL, "invariant");
5570 const int methods_len = methods->length();
5571
5572 check_methods_for_intrinsics(ik, methods);
5573
5574 // Fill in field values obtained by parse_classfile_attributes
5575 if (_parsed_annotations->has_any_annotations()) {
5576 _parsed_annotations->apply_to(ik);
5577 }
5578
5579 apply_parsed_class_attributes(ik);
5580
5581 // Miranda methods
5582 if ((_num_miranda_methods > 0) ||
5583 // if this class introduced new miranda methods or
5584 (_super_klass != NULL && _super_klass->has_miranda_methods())
5585 // super class exists and this class inherited miranda methods
5586 ) {
5587 ik->set_has_miranda_methods(); // then set a flag
5588 }
5589
5590 // Fill in information needed to compute superclasses.
5591 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5592
5593 // Initialize itable offset tables
5594 klassItable::setup_itable_offset_table(ik);
5595
5596 // Compute transitive closure of interfaces this class implements
5597 // Do final class setup
5598 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5599 if (oop_map_blocks->nonstatic_oop_map_count > 0) {
5600 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5601 }
5602
5603 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5604 set_precomputed_flags(ik);
5605
5606 // check if this class can access its super class
5607 check_super_class_access(ik, CHECK);
5608
5609 // check if this class can access its superinterfaces
5610 check_super_interface_access(ik, CHECK);
5611
5612 // check if this class overrides any final method
5613 check_final_method_override(ik, CHECK);
5614
5615 // reject static interface methods prior to Java 8
5616 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5617 check_illegal_static_method(ik, CHECK);
5618 }
5619
5620 // Obtain this_klass' module entry
5621 ModuleEntry* module_entry = ik->module();
5622 assert(module_entry != NULL, "module_entry should always be set");
5623
5624 // Obtain java.lang.Module
5625 Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module()));
5626
5627 // Allocate mirror and initialize static fields
5628 // The create_mirror() call will also call compute_modifiers()
5629 java_lang_Class::create_mirror(ik,
5630 Handle(THREAD, _loader_data->class_loader()),
5631 module_handle,
5632 _protection_domain,
5633 CHECK);
5634
5635 assert(_all_mirandas != NULL, "invariant");
5636
5637 // Generate any default methods - default methods are public interface methods
5638 // that have a default implementation. This is new with Java 8.
5639 if (_has_nonstatic_concrete_methods) {
5640 DefaultMethods::generate_default_methods(ik,
5641 _all_mirandas,
5642 CHECK);
5643 }
5644
5645 // Valhalla shady value type conversion
5646 if (_parsed_annotations->is_derive_value_type()) {
5647 ik->create_derive_value_type(Handle(THREAD, _loader_data->class_loader()),
5648 _protection_domain, CHECK);
5649 }
5650
5651 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5652 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5653 !module_entry->has_default_read_edges()) {
5654 if (!module_entry->set_has_default_read_edges()) {
5655 // We won a potential race
5656 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5657 }
5658 }
5659
5660 // Update the loader_data graph.
5661 record_defined_class_dependencies(ik, CHECK);
5662
5663 for (FieldStream st((InstanceKlass*)ik, false, false); !st.eos(); st.next()) {
5664 Symbol* signature = st.signature();
5665 if (signature->starts_with("Q")) {
5666 Klass* klass = SystemDictionary::resolve_or_fail(signature,
5667 Handle(THREAD, ik->class_loader()),
5668 Handle(THREAD, ik->protection_domain()), true, CHECK);
5669 assert(klass != NULL, "Sanity check");
5670 assert(klass->access_flags().is_value_type(), "Value type expected");
5671 ik->set_value_field_klass(st.index(), klass);
5672 }
5673 }
5674
5675 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5676
5677 if (!is_internal()) {
5678 if (log_is_enabled(Info, class, load)) {
5679 ResourceMark rm;
5680 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5681 ik->print_class_load_logging(_loader_data, module_name, _stream);
5682 }
5683
5684 if (log_is_enabled(Debug, class, resolve)) {
5685 ResourceMark rm;
5686 // print out the superclass.
5687 const char * from = ik->external_name();
5688 if (ik->java_super() != NULL) {
5689 log_debug(class, resolve)("%s %s (super)",
5690 from,
5691 ik->java_super()->external_name());
5692 }
5693 // print out each of the interface classes referred to by this class.
5694 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5695 if (local_interfaces != NULL) {
5696 const int length = local_interfaces->length();
5697 for (int i = 0; i < length; i++) {
5698 const Klass* const k = local_interfaces->at(i);
5699 const char * to = k->external_name();
5700 log_debug(class, resolve)("%s %s (interface)", from, to);
5701 }
5702 }
5703 }
5704 }
5705
5706 TRACE_INIT_ID(ik);
5707
5708 // If we reach here, all is well.
5709 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5710 // in order for it to not be destroyed in the ClassFileParser destructor.
5711 set_klass_to_deallocate(NULL);
5712
5713 // it's official
5714 set_klass(ik);
5715
5716 debug_only(ik->verify();)
5717 }
5718
5719 // For an anonymous class that is in the unnamed package, move it to its host class's
5720 // package by prepending its host class's package name to its class name and setting
5721 // its _class_name field.
5722 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5723 ResourceMark rm(THREAD);
5724 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5725 "Anonymous class should not be in a package");
5726 const char* host_pkg_name =
5727 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5728
5729 if (host_pkg_name != NULL) {
5730 size_t host_pkg_len = strlen(host_pkg_name);
5731 int class_name_len = _class_name->utf8_length();
5732 char* new_anon_name =
5733 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5734 // Copy host package name and trailing /.
5735 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5736 new_anon_name[host_pkg_len] = '/';
5737 // Append anonymous class name. The anonymous class name can contain odd
5738 // characters. So, do a strncpy instead of using sprintf("%s...").
5739 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5740
5741 // Create a symbol and update the anonymous class name.
5742 _class_name = SymbolTable::new_symbol(new_anon_name,
5743 (int)host_pkg_len + 1 + class_name_len,
5744 CHECK);
5745 }
5746 }
5747
5748 // If the host class and the anonymous class are in the same package then do
5749 // nothing. If the anonymous class is in the unnamed package then move it to its
5750 // host's package. If the classes are in different packages then throw an IAE
5751 // exception.
5752 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5753 assert(_host_klass != NULL, "Expected an anonymous class");
5754
5755 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5756 _class_name->utf8_length(), '/');
5757 if (anon_last_slash == NULL) { // Unnamed package
5758 prepend_host_package_name(_host_klass, CHECK);
5759 } else {
5760 if (!InstanceKlass::is_same_class_package(_host_klass->class_loader(),
5761 _host_klass->name(),
5762 _host_klass->class_loader(),
5763 _class_name)) {
5764 ResourceMark rm(THREAD);
5765 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5766 err_msg("Host class %s and anonymous class %s are in different packages",
5767 _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5768 }
5769 }
5770 }
5771
5772 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5773 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5774 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5775 bool need_verify =
5776 // verifyAll
5777 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5778 // verifyRemote
5779 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5780 return !need_verify;
5781 }
5782
5783 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5784 Symbol* name,
5785 ClassLoaderData* loader_data,
5786 Handle protection_domain,
5787 const InstanceKlass* host_klass,
5788 GrowableArray<Handle>* cp_patches,
5789 Publicity pub_level,
5790 TRAPS) :
5791 _stream(stream),
5792 _requested_name(name),
5793 _loader_data(loader_data),
5794 _host_klass(host_klass),
5795 _cp_patches(cp_patches),
5796 _num_patched_klasses(0),
5797 _max_num_patched_klasses(0),
5798 _orig_cp_size(0),
5799 _first_patched_klass_resolved_index(0),
5800 _super_klass(),
5801 _cp(NULL),
5802 _fields(NULL),
5803 _methods(NULL),
5804 _inner_classes(NULL),
5805 _local_interfaces(NULL),
5806 _transitive_interfaces(NULL),
5807 _combined_annotations(NULL),
5808 _annotations(NULL),
5809 _type_annotations(NULL),
5810 _fields_annotations(NULL),
5811 _fields_type_annotations(NULL),
5812 _klass(NULL),
5813 _klass_to_deallocate(NULL),
5814 _parsed_annotations(NULL),
5815 _fac(NULL),
5816 _field_info(NULL),
5817 _method_ordering(NULL),
5818 _all_mirandas(NULL),
5819 _vtable_size(0),
5820 _itable_size(0),
5821 _num_miranda_methods(0),
5822 _rt(REF_NONE),
5823 _protection_domain(protection_domain),
5824 _access_flags(),
5825 _pub_level(pub_level),
5826 _bad_constant_seen(0),
5827 _synthetic_flag(false),
5828 _sde_length(false),
5829 _sde_buffer(NULL),
5830 _sourcefile_index(0),
5831 _generic_signature_index(0),
5832 _major_version(0),
5833 _minor_version(0),
5834 _this_class_index(0),
5835 _super_class_index(0),
5836 _itfs_len(0),
5837 _java_fields_count(0),
5838 _need_verify(false),
5839 _relax_verify(false),
5840 _has_nonstatic_concrete_methods(false),
5841 _declares_nonstatic_concrete_methods(false),
5842 _has_final_method(false),
5843 _has_finalizer(false),
5844 _has_empty_finalizer(false),
5845 _has_vanilla_constructor(false),
5846 _max_bootstrap_specifier_index(-1),
5847 _has_value_fields(false) {
5848
5849 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5850
5851 assert(THREAD->is_Java_thread(), "invariant");
5852 assert(_loader_data != NULL, "invariant");
5853 assert(stream != NULL, "invariant");
5854 assert(_stream != NULL, "invariant");
5855 assert(_stream->buffer() == _stream->current(), "invariant");
5856 assert(_class_name != NULL, "invariant");
5857 assert(0 == _access_flags.as_int(), "invariant");
5858
5859 // Figure out whether we can skip format checking (matching classic VM behavior)
5860 if (DumpSharedSpaces) {
5861 // verify == true means it's a 'remote' class (i.e., non-boot class)
5862 // Verification decision is based on BytecodeVerificationRemote flag
5863 // for those classes.
5864 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5865 BytecodeVerificationLocal;
5866 }
5867 else {
5868 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5869 stream->need_verify());
5870 }
5871 if (_cp_patches != NULL) {
5872 int len = _cp_patches->length();
5873 for (int i=0; i<len; i++) {
5874 if (has_cp_patch_at(i)) {
5875 Handle patch = cp_patch_at(i);
5876 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5877 // We need to append the names of the patched classes to the end of the constant pool,
5878 // because a patched class may have a Utf8 name that's not already included in the
5879 // original constant pool. These class names are used when patch_constant_pool()
5880 // calls patch_class().
5881 //
5882 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5883 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5884 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5885 _max_num_patched_klasses++;
5886 }
5887 }
5888 }
5889 }
5890
5891 // synch back verification state to stream
5892 stream->set_verify(_need_verify);
5893
5894 // Check if verification needs to be relaxed for this class file
5895 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5896 _relax_verify = relax_format_check_for(_loader_data);
5897
5898 parse_stream(stream, CHECK);
5899
5900 post_process_parsed_stream(stream, _cp, CHECK);
5901 }
5902
5903 void ClassFileParser::clear_class_metadata() {
5904 // metadata created before the instance klass is created. Must be
5905 // deallocated if classfile parsing returns an error.
5906 _cp = NULL;
5907 _fields = NULL;
5908 _methods = NULL;
5909 _inner_classes = NULL;
5910 _local_interfaces = NULL;
5911 _transitive_interfaces = NULL;
5912 _combined_annotations = NULL;
5913 _annotations = _type_annotations = NULL;
5914 _fields_annotations = _fields_type_annotations = NULL;
5915 }
5916
5917 // Destructor to clean up
5918 ClassFileParser::~ClassFileParser() {
5919 if (_cp != NULL) {
5920 MetadataFactory::free_metadata(_loader_data, _cp);
5921 }
5922 if (_fields != NULL) {
5923 MetadataFactory::free_array<u2>(_loader_data, _fields);
5924 }
5925
5926 if (_methods != NULL) {
5927 // Free methods
5928 InstanceKlass::deallocate_methods(_loader_data, _methods);
5929 }
5930
5931 // beware of the Universe::empty_blah_array!!
5932 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5933 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5934 }
5935
5936 // Free interfaces
5937 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5938 _local_interfaces, _transitive_interfaces);
5939
5940 if (_combined_annotations != NULL) {
5941 // After all annotations arrays have been created, they are installed into the
5942 // Annotations object that will be assigned to the InstanceKlass being created.
5943
5944 // Deallocate the Annotations object and the installed annotations arrays.
5945 _combined_annotations->deallocate_contents(_loader_data);
5946
5947 // If the _combined_annotations pointer is non-NULL,
5948 // then the other annotations fields should have been cleared.
5949 assert(_annotations == NULL, "Should have been cleared");
5950 assert(_type_annotations == NULL, "Should have been cleared");
5951 assert(_fields_annotations == NULL, "Should have been cleared");
5952 assert(_fields_type_annotations == NULL, "Should have been cleared");
5953 } else {
5954 // If the annotations arrays were not installed into the Annotations object,
5955 // then they have to be deallocated explicitly.
5956 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5957 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5958 Annotations::free_contents(_loader_data, _fields_annotations);
5959 Annotations::free_contents(_loader_data, _fields_type_annotations);
5960 }
5961
5962 clear_class_metadata();
5963
5964 // deallocate the klass if already created. Don't directly deallocate, but add
5965 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5966 // at a safepoint.
5967 if (_klass_to_deallocate != NULL) {
5968 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5969 }
5970 }
5971
5972 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5973 TRAPS) {
5974
5975 assert(stream != NULL, "invariant");
5976 assert(_class_name != NULL, "invariant");
5977
5978 // BEGIN STREAM PARSING
5979 stream->guarantee_more(8, CHECK); // magic, major, minor
5980 // Magic value
5981 const u4 magic = stream->get_u4_fast();
5982 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5983 "Incompatible magic value %u in class file %s",
5984 magic, CHECK);
5985
5986 // Version numbers
5987 _minor_version = stream->get_u2_fast();
5988 _major_version = stream->get_u2_fast();
5989
5990 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5991 ResourceMark rm;
5992 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5993 _major_version, _minor_version, _class_name->as_C_string());
5994 Exceptions::fthrow(
5995 THREAD_AND_LOCATION,
5996 vmSymbols::java_lang_UnsupportedClassVersionError(),
5997 "Unsupported major.minor version for dump time %u.%u",
5998 _major_version,
5999 _minor_version);
6000 }
6001
6002 // Check version numbers - we check this even with verifier off
6003 if (!is_supported_version(_major_version, _minor_version)) {
6004 ResourceMark rm(THREAD);
6005 Exceptions::fthrow(
6006 THREAD_AND_LOCATION,
6007 vmSymbols::java_lang_UnsupportedClassVersionError(),
6008 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
6009 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
6010 _class_name->as_C_string(),
6011 _major_version,
6012 _minor_version,
6013 JAVA_MAX_SUPPORTED_VERSION,
6014 JAVA_MAX_SUPPORTED_MINOR_VERSION);
6015 return;
6016 }
6017
6018 stream->guarantee_more(3, CHECK); // length, first cp tag
6019 u2 cp_size = stream->get_u2_fast();
6020
6021 guarantee_property(
6022 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6023 cp_size, CHECK);
6024
6025 _orig_cp_size = cp_size;
6026 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6027 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6028 }
6029 cp_size += _max_num_patched_klasses;
6030
6031 _cp = ConstantPool::allocate(_loader_data,
6032 cp_size,
6033 CHECK);
6034
6035 ConstantPool* const cp = _cp;
6036
6037 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6038
6039 assert(cp_size == (const u2)cp->length(), "invariant");
6040
6041 // ACCESS FLAGS
6042 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6043
6044 // Access flags
6045 jint flags;
6046 // JVM_ACC_MODULE is defined in JDK-9 and later.
6047 if (_major_version >= JAVA_9_VERSION) {
6048 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
6049 } else {
6050 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
6051 }
6052
6053 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6054 // Set abstract bit for old class files for backward compatibility
6055 flags |= JVM_ACC_ABSTRACT;
6056 }
6057
6058 verify_legal_class_modifiers(flags, CHECK);
6059
6060 short bad_constant = class_bad_constant_seen();
6061 if (bad_constant != 0) {
6062 // Do not throw CFE until after the access_flags are checked because if
6063 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6064 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6065 }
6066
6067 _access_flags.set_flags(flags);
6068
6069 // This class and superclass
6070 _this_class_index = stream->get_u2_fast();
6071 check_property(
6072 valid_cp_range(_this_class_index, cp_size) &&
6073 cp->tag_at(_this_class_index).is_unresolved_klass(),
6074 "Invalid this class index %u in constant pool in class file %s",
6075 _this_class_index, CHECK);
6076
6077 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6078 assert(class_name_in_cp != NULL, "class_name can't be null");
6079
6080 // Update _class_name which could be null previously
6081 // to reflect the name in the constant pool
6082 _class_name = class_name_in_cp;
6083
6084 // Don't need to check whether this class name is legal or not.
6085 // It has been checked when constant pool is parsed.
6086 // However, make sure it is not an array type.
6087 if (_need_verify) {
6088 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
6089 "Bad class name in class file %s",
6090 CHECK);
6091 }
6092
6093 // Checks if name in class file matches requested name
6094 if (_requested_name != NULL && _requested_name != _class_name) {
6095 ResourceMark rm(THREAD);
6096 Exceptions::fthrow(
6097 THREAD_AND_LOCATION,
6098 vmSymbols::java_lang_NoClassDefFoundError(),
6099 "%s (wrong name: %s)",
6100 _class_name->as_C_string(),
6101 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6102 );
6103 return;
6104 }
6105
6106 // if this is an anonymous class fix up its name if it's in the unnamed
6107 // package. Otherwise, throw IAE if it is in a different package than
6108 // its host class.
6109 if (_host_klass != NULL) {
6110 fix_anonymous_class_name(CHECK);
6111 }
6112
6113 // Verification prevents us from creating names with dots in them, this
6114 // asserts that that's the case.
6115 assert(is_internal_format(_class_name), "external class name format used internally");
6116
6117 if (!is_internal()) {
6118 if (log_is_enabled(Debug, class, preorder)){
6119 ResourceMark rm(THREAD);
6120 outputStream* log = Log(class, preorder)::debug_stream();
6121 log->print("%s", _class_name->as_klass_external_name());
6122 if (stream->source() != NULL) {
6123 log->print(" source: %s", stream->source());
6124 }
6125 log->cr();
6126 }
6127
6128 #if INCLUDE_CDS
6129 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6130 // Only dump the classes that can be stored into CDS archive.
6131 // Anonymous classes such as generated LambdaForm classes are also not included.
6132 if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6133 _host_klass == NULL) {
6134 oop class_loader = _loader_data->class_loader();
6135 ResourceMark rm(THREAD);
6136 // For the boot and platform class loaders, check if the class is not found in the
6137 // java runtime image. Additional check for the boot class loader is if the class
6138 // is not found in the boot loader's appended entries. This indicates that the class
6139 // is not useable during run time, such as the ones found in the --patch-module entries,
6140 // so it should not be included in the classlist file.
6141 if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) ||
6142 SystemDictionary::is_platform_class_loader(class_loader)) &&
6143 !ClassLoader::is_jrt(stream->source())) {
6144 tty->print_cr("skip writing class %s from source %s to classlist file",
6145 _class_name->as_C_string(), stream->source());
6146 } else {
6147 classlist_file->print_cr("%s", _class_name->as_C_string());
6148 classlist_file->flush();
6149 }
6150 }
6151 }
6152 #endif
6153 }
6154
6155 // SUPERKLASS
6156 _super_class_index = stream->get_u2_fast();
6157 _super_klass = parse_super_class(cp,
6158 _super_class_index,
6159 _need_verify,
6160 CHECK);
6161
6162 // Interfaces
6163 _itfs_len = stream->get_u2_fast();
6164 parse_interfaces(stream,
6165 _itfs_len,
6166 cp,
6167 &_has_nonstatic_concrete_methods,
6168 CHECK);
6169
6170 assert(_local_interfaces != NULL, "invariant");
6171
6172 // Fields (offsets are filled in later)
6173 _fac = new FieldAllocationCount();
6174 parse_fields(stream,
6175 _access_flags.is_interface(),
6176 _fac,
6177 cp,
6178 cp_size,
6179 &_java_fields_count,
6180 CHECK);
6181
6182 assert(_fields != NULL, "invariant");
6183
6184 // Methods
6185 AccessFlags promoted_flags;
6186 parse_methods(stream,
6187 _access_flags.is_interface(),
6188 &promoted_flags,
6189 &_has_final_method,
6190 &_declares_nonstatic_concrete_methods,
6191 CHECK);
6192
6193 assert(_methods != NULL, "invariant");
6194
6195 // promote flags from parse_methods() to the klass' flags
6196 _access_flags.add_promoted_flags(promoted_flags.as_int());
6197
6198 if (_declares_nonstatic_concrete_methods) {
6199 _has_nonstatic_concrete_methods = true;
6200 }
6201
6202 // Additional attributes/annotations
6203 _parsed_annotations = new ClassAnnotationCollector();
6204 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6205
6206 assert(_inner_classes != NULL, "invariant");
6207
6208 // Finalize the Annotations metadata object,
6209 // now that all annotation arrays have been created.
6210 create_combined_annotations(CHECK);
6211
6212 // Make sure this is the end of class file stream
6213 guarantee_property(stream->at_eos(),
6214 "Extra bytes at the end of class file %s",
6215 CHECK);
6216
6217 // all bytes in stream read and parsed
6218 }
6219
6220 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6221 ConstantPool* cp,
6222 TRAPS) {
6223 assert(stream != NULL, "invariant");
6224 assert(stream->at_eos(), "invariant");
6225 assert(cp != NULL, "invariant");
6226 assert(_loader_data != NULL, "invariant");
6227
6228 if (_class_name == vmSymbols::java_lang_Object()) {
6229 check_property(_local_interfaces == Universe::the_empty_klass_array(),
6230 "java.lang.Object cannot implement an interface in class file %s",
6231 CHECK);
6232 }
6233 // We check super class after class file is parsed and format is checked
6234 if (_super_class_index > 0 && NULL ==_super_klass) {
6235 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6236 if (_access_flags.is_interface()) {
6237 // Before attempting to resolve the superclass, check for class format
6238 // errors not checked yet.
6239 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6240 "Interfaces must have java.lang.Object as superclass in class file %s",
6241 CHECK);
6242 }
6243 Handle loader(THREAD, _loader_data->class_loader());
6244 _super_klass = (const InstanceKlass*)
6245 SystemDictionary::resolve_super_or_fail(_class_name,
6246 super_class_name,
6247 loader,
6248 _protection_domain,
6249 true,
6250 CHECK);
6251 }
6252
6253 if (_super_klass != NULL) {
6254 if (_super_klass->has_nonstatic_concrete_methods()) {
6255 _has_nonstatic_concrete_methods = true;
6256 }
6257
6258 if (_super_klass->is_interface()) {
6259 ResourceMark rm(THREAD);
6260 Exceptions::fthrow(
6261 THREAD_AND_LOCATION,
6262 vmSymbols::java_lang_IncompatibleClassChangeError(),
6263 "class %s has interface %s as super class",
6264 _class_name->as_klass_external_name(),
6265 _super_klass->external_name()
6266 );
6267 return;
6268 }
6269 // Make sure super class is not final
6270 if (_super_klass->is_final()
6271 && !(_super_klass->name() == vmSymbols::java_lang____Value()
6272 && (_access_flags.get_flags() & JVM_ACC_VALUE))) {
6273 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6274 }
6275 }
6276
6277 // Compute the transitive list of all unique interfaces implemented by this class
6278 _transitive_interfaces =
6279 compute_transitive_interfaces(_super_klass,
6280 _local_interfaces,
6281 _loader_data,
6282 CHECK);
6283
6284 assert(_transitive_interfaces != NULL, "invariant");
6285
6286 // sort methods
6287 _method_ordering = sort_methods(_methods);
6288
6289 _all_mirandas = new GrowableArray<Method*>(20);
6290
6291 Handle loader(THREAD, _loader_data->class_loader());
6292 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6293 &_num_miranda_methods,
6294 _all_mirandas,
6295 _super_klass,
6296 _methods,
6297 _access_flags,
6298 _major_version,
6299 loader,
6300 _class_name,
6301 _local_interfaces,
6302 CHECK);
6303
6304 // Size of Java itable (in words)
6305 _itable_size = _access_flags.is_interface() ? 0 :
6306 klassItable::compute_itable_size(_transitive_interfaces);
6307
6308 assert(_fac != NULL, "invariant");
6309 assert(_parsed_annotations != NULL, "invariant");
6310
6311 _field_info = new FieldLayoutInfo();
6312 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6313
6314 // Compute reference typ
6315 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6316
6317 }
6318
6319 void ClassFileParser::set_klass(InstanceKlass* klass) {
6320
6321 #ifdef ASSERT
6322 if (klass != NULL) {
6323 assert(NULL == _klass, "leaking?");
6324 }
6325 #endif
6326
6327 _klass = klass;
6328 }
6329
6330 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6331
6332 #ifdef ASSERT
6333 if (klass != NULL) {
6334 assert(NULL == _klass_to_deallocate, "leaking?");
6335 }
6336 #endif
6337
6338 _klass_to_deallocate = klass;
6339 }
6340
6341 // Caller responsible for ResourceMark
6342 // clone stream with rewound position
6343 const ClassFileStream* ClassFileParser::clone_stream() const {
6344 assert(_stream != NULL, "invariant");
6345
6346 return _stream->clone();
6347 }
6348
6349 bool ClassFileParser::is_derive_value_type() const {
6350 return _parsed_annotations->is_derive_value_type();
6351 }
6352
6353 // ----------------------------------------------------------------------------
6354 // debugging
6355
6356 #ifdef ASSERT
6357
6358 // return true if class_name contains no '.' (internal format is '/')
6359 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6360 if (class_name != NULL) {
6361 ResourceMark rm;
6362 char* name = class_name->as_C_string();
6363 return strchr(name, '.') == NULL;
6364 } else {
6365 return true;
6366 }
6367 }
6368
6369 #endif