1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24 #include "precompiled.hpp"
25 #include "jvm.h"
26 #include "aot/aotLoader.hpp"
27 #include "classfile/classFileParser.hpp"
28 #include "classfile/classFileStream.hpp"
29 #include "classfile/classLoader.hpp"
30 #include "classfile/classLoaderData.inline.hpp"
31 #include "classfile/defaultMethods.hpp"
32 #include "classfile/dictionary.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/moduleEntry.hpp"
35 #include "classfile/symbolTable.hpp"
36 #include "classfile/systemDictionary.hpp"
37 #include "classfile/verificationType.hpp"
38 #include "classfile/verifier.hpp"
39 #include "classfile/vmSymbols.hpp"
40 #include "logging/log.hpp"
41 #include "logging/logStream.hpp"
42 #include "memory/allocation.hpp"
43 #include "memory/metadataFactory.hpp"
44 #include "memory/oopFactory.hpp"
45 #include "memory/resourceArea.hpp"
46 #include "memory/universe.hpp"
47 #include "oops/annotations.hpp"
48 #include "oops/constantPool.inline.hpp"
49 #include "oops/fieldStreams.hpp"
50 #include "oops/instanceKlass.hpp"
51 #include "oops/instanceMirrorKlass.hpp"
52 #include "oops/klass.inline.hpp"
53 #include "oops/klassVtable.hpp"
54 #include "oops/metadata.hpp"
55 #include "oops/method.hpp"
56 #include "oops/oop.inline.hpp"
57 #include "oops/symbol.hpp"
58 #include "prims/jvmtiExport.hpp"
59 #include "prims/jvmtiThreadState.hpp"
60 #include "runtime/arguments.hpp"
61 #include "runtime/handles.inline.hpp"
62 #include "runtime/javaCalls.hpp"
63 #include "runtime/perfData.hpp"
64 #include "runtime/reflection.hpp"
65 #include "runtime/safepointVerifiers.hpp"
66 #include "runtime/signature.hpp"
67 #include "runtime/timer.hpp"
68 #include "services/classLoadingService.hpp"
69 #include "services/threadService.hpp"
70 #include "utilities/align.hpp"
71 #include "utilities/bitMap.inline.hpp"
72 #include "utilities/copy.hpp"
73 #include "utilities/exceptions.hpp"
74 #include "utilities/globalDefinitions.hpp"
75 #include "utilities/growableArray.hpp"
76 #include "utilities/macros.hpp"
77 #include "utilities/ostream.hpp"
78 #include "utilities/resourceHash.hpp"
79 #if INCLUDE_CDS
80 #include "classfile/systemDictionaryShared.hpp"
81 #endif
82 #if INCLUDE_JFR
83 #include "jfr/support/jfrTraceIdExtension.hpp"
84 #endif
85
86 // We generally try to create the oops directly when parsing, rather than
87 // allocating temporary data structures and copying the bytes twice. A
88 // temporary area is only needed when parsing utf8 entries in the constant
89 // pool and when parsing line number tables.
90
91 // We add assert in debug mode when class format is not checked.
92
93 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
94 #define JAVA_MIN_SUPPORTED_VERSION 45
95 #define JAVA_PREVIEW_MINOR_VERSION 65535
96
97 // Used for two backward compatibility reasons:
98 // - to check for new additions to the class file format in JDK1.5
99 // - to check for bug fixes in the format checker in JDK1.5
100 #define JAVA_1_5_VERSION 49
101
102 // Used for backward compatibility reasons:
103 // - to check for javac bug fixes that happened after 1.5
104 // - also used as the max version when running in jdk6
105 #define JAVA_6_VERSION 50
106
107 // Used for backward compatibility reasons:
108 // - to disallow argument and require ACC_STATIC for <clinit> methods
109 #define JAVA_7_VERSION 51
110
111 // Extension method support.
112 #define JAVA_8_VERSION 52
113
114 #define JAVA_9_VERSION 53
115
116 #define JAVA_10_VERSION 54
117
118 #define JAVA_11_VERSION 55
119
120 #define JAVA_12_VERSION 56
121
122 #define JAVA_13_VERSION 57
123
124 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
125 assert((bad_constant == 19 || bad_constant == 20) && _major_version >= JAVA_9_VERSION,
126 "Unexpected bad constant pool entry");
127 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
128 }
129
130 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
131 ConstantPool* cp,
132 const int length,
133 TRAPS) {
134 assert(stream != NULL, "invariant");
135 assert(cp != NULL, "invariant");
136
137 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
138 // this function (_current can be allocated in a register, with scalar
139 // replacement of aggregates). The _current pointer is copied back to
140 // stream() when this function returns. DON'T call another method within
141 // this method that uses stream().
142 const ClassFileStream cfs1 = *stream;
143 const ClassFileStream* const cfs = &cfs1;
144
145 assert(cfs->allocated_on_stack(), "should be local");
146 debug_only(const u1* const old_current = stream->current();)
147
148 // Used for batching symbol allocations.
149 const char* names[SymbolTable::symbol_alloc_batch_size];
150 int lengths[SymbolTable::symbol_alloc_batch_size];
151 int indices[SymbolTable::symbol_alloc_batch_size];
152 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
153 int names_count = 0;
154
155 // parsing Index 0 is unused
156 for (int index = 1; index < length; index++) {
157 // Each of the following case guarantees one more byte in the stream
158 // for the following tag or the access_flags following constant pool,
159 // so we don't need bounds-check for reading tag.
160 const u1 tag = cfs->get_u1_fast();
161 switch (tag) {
162 case JVM_CONSTANT_Class : {
163 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
164 const u2 name_index = cfs->get_u2_fast();
165 cp->klass_index_at_put(index, name_index);
166 break;
167 }
168 case JVM_CONSTANT_Fieldref: {
169 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
170 const u2 class_index = cfs->get_u2_fast();
171 const u2 name_and_type_index = cfs->get_u2_fast();
172 cp->field_at_put(index, class_index, name_and_type_index);
173 break;
174 }
175 case JVM_CONSTANT_Methodref: {
176 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
177 const u2 class_index = cfs->get_u2_fast();
178 const u2 name_and_type_index = cfs->get_u2_fast();
179 cp->method_at_put(index, class_index, name_and_type_index);
180 break;
181 }
182 case JVM_CONSTANT_InterfaceMethodref: {
183 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
184 const u2 class_index = cfs->get_u2_fast();
185 const u2 name_and_type_index = cfs->get_u2_fast();
186 cp->interface_method_at_put(index, class_index, name_and_type_index);
187 break;
188 }
189 case JVM_CONSTANT_String : {
190 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
191 const u2 string_index = cfs->get_u2_fast();
192 cp->string_index_at_put(index, string_index);
193 break;
194 }
195 case JVM_CONSTANT_MethodHandle :
196 case JVM_CONSTANT_MethodType: {
197 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
198 classfile_parse_error(
199 "Class file version does not support constant tag %u in class file %s",
200 tag, CHECK);
201 }
202 if (tag == JVM_CONSTANT_MethodHandle) {
203 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
204 const u1 ref_kind = cfs->get_u1_fast();
205 const u2 method_index = cfs->get_u2_fast();
206 cp->method_handle_index_at_put(index, ref_kind, method_index);
207 }
208 else if (tag == JVM_CONSTANT_MethodType) {
209 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
210 const u2 signature_index = cfs->get_u2_fast();
211 cp->method_type_index_at_put(index, signature_index);
212 }
213 else {
214 ShouldNotReachHere();
215 }
216 break;
217 }
218 case JVM_CONSTANT_Dynamic : {
219 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
220 classfile_parse_error(
221 "Class file version does not support constant tag %u in class file %s",
222 tag, CHECK);
223 }
224 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
225 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
226 const u2 name_and_type_index = cfs->get_u2_fast();
227 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
228 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
229 }
230 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
231 break;
232 }
233 case JVM_CONSTANT_InvokeDynamic : {
234 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
235 classfile_parse_error(
236 "Class file version does not support constant tag %u in class file %s",
237 tag, CHECK);
238 }
239 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
240 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
241 const u2 name_and_type_index = cfs->get_u2_fast();
242 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
243 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
244 }
245 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
246 break;
247 }
248 case JVM_CONSTANT_Integer: {
249 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
250 const u4 bytes = cfs->get_u4_fast();
251 cp->int_at_put(index, (jint)bytes);
252 break;
253 }
254 case JVM_CONSTANT_Float: {
255 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
256 const u4 bytes = cfs->get_u4_fast();
257 cp->float_at_put(index, *(jfloat*)&bytes);
258 break;
259 }
260 case JVM_CONSTANT_Long: {
261 // A mangled type might cause you to overrun allocated memory
262 guarantee_property(index + 1 < length,
263 "Invalid constant pool entry %u in class file %s",
264 index,
265 CHECK);
266 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
267 const u8 bytes = cfs->get_u8_fast();
268 cp->long_at_put(index, bytes);
269 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
270 break;
271 }
272 case JVM_CONSTANT_Double: {
273 // A mangled type might cause you to overrun allocated memory
274 guarantee_property(index+1 < length,
275 "Invalid constant pool entry %u in class file %s",
276 index,
277 CHECK);
278 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
279 const u8 bytes = cfs->get_u8_fast();
280 cp->double_at_put(index, *(jdouble*)&bytes);
281 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
282 break;
283 }
284 case JVM_CONSTANT_NameAndType: {
285 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
286 const u2 name_index = cfs->get_u2_fast();
287 const u2 signature_index = cfs->get_u2_fast();
288 cp->name_and_type_at_put(index, name_index, signature_index);
289 break;
290 }
291 case JVM_CONSTANT_Utf8 : {
292 cfs->guarantee_more(2, CHECK); // utf8_length
293 u2 utf8_length = cfs->get_u2_fast();
294 const u1* utf8_buffer = cfs->current();
295 assert(utf8_buffer != NULL, "null utf8 buffer");
296 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
297 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
298 cfs->skip_u1_fast(utf8_length);
299
300 // Before storing the symbol, make sure it's legal
301 if (_need_verify) {
302 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
303 }
304
305 if (has_cp_patch_at(index)) {
306 Handle patch = clear_cp_patch_at(index);
307 guarantee_property(java_lang_String::is_instance(patch()),
308 "Illegal utf8 patch at %d in class file %s",
309 index,
310 CHECK);
311 const char* const str = java_lang_String::as_utf8_string(patch());
312 // (could use java_lang_String::as_symbol instead, but might as well batch them)
313 utf8_buffer = (const u1*) str;
314 utf8_length = (int) strlen(str);
315 }
316
317 unsigned int hash;
318 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
319 utf8_length,
320 hash);
321 if (result == NULL) {
322 names[names_count] = (const char*)utf8_buffer;
323 lengths[names_count] = utf8_length;
324 indices[names_count] = index;
325 hashValues[names_count++] = hash;
326 if (names_count == SymbolTable::symbol_alloc_batch_size) {
327 SymbolTable::new_symbols(_loader_data,
328 cp,
329 names_count,
330 names,
331 lengths,
332 indices,
333 hashValues,
334 CHECK);
335 names_count = 0;
336 }
337 } else {
338 cp->symbol_at_put(index, result);
339 }
340 break;
341 }
342 case 19:
343 case 20: {
344 // Record that an error occurred in these two cases but keep parsing so
345 // that ACC_Module can be checked for in the access_flags. Need to
346 // throw NoClassDefFoundError in that case.
347 if (_major_version >= JAVA_9_VERSION) {
348 cfs->guarantee_more(3, CHECK);
349 cfs->get_u2_fast();
350 set_class_bad_constant_seen(tag);
351 break;
352 }
353 }
354 default: {
355 classfile_parse_error("Unknown constant tag %u in class file %s",
356 tag,
357 CHECK);
358 break;
359 }
360 } // end of switch(tag)
361 } // end of for
362
363 // Allocate the remaining symbols
364 if (names_count > 0) {
365 SymbolTable::new_symbols(_loader_data,
366 cp,
367 names_count,
368 names,
369 lengths,
370 indices,
371 hashValues,
372 CHECK);
373 }
374
375 // Copy _current pointer of local copy back to stream.
376 assert(stream->current() == old_current, "non-exclusive use of stream");
377 stream->set_current(cfs1.current());
378
379 }
380
381 static inline bool valid_cp_range(int index, int length) {
382 return (index > 0 && index < length);
383 }
384
385 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
386 assert(cp != NULL, "invariant");
387 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
388 return cp->symbol_at(index);
389 }
390 return NULL;
391 }
392
393 #ifdef ASSERT
394 PRAGMA_DIAG_PUSH
395 PRAGMA_FORMAT_NONLITERAL_IGNORED
396 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
397 ResourceMark rm(THREAD);
398 fatal(msg, _class_name->as_C_string());
399 }
400
401 void ClassFileParser::report_assert_property_failure(const char* msg,
402 int index,
403 TRAPS) const {
404 ResourceMark rm(THREAD);
405 fatal(msg, index, _class_name->as_C_string());
406 }
407 PRAGMA_DIAG_POP
408 #endif
409
410 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
411 ConstantPool* const cp,
412 const int length,
413 TRAPS) {
414 assert(cp != NULL, "invariant");
415 assert(stream != NULL, "invariant");
416
417 // parsing constant pool entries
418 parse_constant_pool_entries(stream, cp, length, CHECK);
419 if (class_bad_constant_seen() != 0) {
420 // a bad CP entry has been detected previously so stop parsing and just return.
421 return;
422 }
423
424 int index = 1; // declared outside of loops for portability
425 int num_klasses = 0;
426
427 // first verification pass - validate cross references
428 // and fixup class and string constants
429 for (index = 1; index < length; index++) { // Index 0 is unused
430 const jbyte tag = cp->tag_at(index).value();
431 switch (tag) {
432 case JVM_CONSTANT_Class: {
433 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
434 break;
435 }
436 case JVM_CONSTANT_Fieldref:
437 // fall through
438 case JVM_CONSTANT_Methodref:
439 // fall through
440 case JVM_CONSTANT_InterfaceMethodref: {
441 if (!_need_verify) break;
442 const int klass_ref_index = cp->klass_ref_index_at(index);
443 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
444 check_property(valid_klass_reference_at(klass_ref_index),
445 "Invalid constant pool index %u in class file %s",
446 klass_ref_index, CHECK);
447 check_property(valid_cp_range(name_and_type_ref_index, length) &&
448 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
449 "Invalid constant pool index %u in class file %s",
450 name_and_type_ref_index, CHECK);
451 break;
452 }
453 case JVM_CONSTANT_String: {
454 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
455 break;
456 }
457 case JVM_CONSTANT_Integer:
458 break;
459 case JVM_CONSTANT_Float:
460 break;
461 case JVM_CONSTANT_Long:
462 case JVM_CONSTANT_Double: {
463 index++;
464 check_property(
465 (index < length && cp->tag_at(index).is_invalid()),
466 "Improper constant pool long/double index %u in class file %s",
467 index, CHECK);
468 break;
469 }
470 case JVM_CONSTANT_NameAndType: {
471 if (!_need_verify) break;
472 const int name_ref_index = cp->name_ref_index_at(index);
473 const int signature_ref_index = cp->signature_ref_index_at(index);
474 check_property(valid_symbol_at(name_ref_index),
475 "Invalid constant pool index %u in class file %s",
476 name_ref_index, CHECK);
477 check_property(valid_symbol_at(signature_ref_index),
478 "Invalid constant pool index %u in class file %s",
479 signature_ref_index, CHECK);
480 break;
481 }
482 case JVM_CONSTANT_Utf8:
483 break;
484 case JVM_CONSTANT_UnresolvedClass: // fall-through
485 case JVM_CONSTANT_UnresolvedClassInError: {
486 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
487 break;
488 }
489 case JVM_CONSTANT_ClassIndex: {
490 const int class_index = cp->klass_index_at(index);
491 check_property(valid_symbol_at(class_index),
492 "Invalid constant pool index %u in class file %s",
493 class_index, CHECK);
494 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
495 break;
496 }
497 case JVM_CONSTANT_StringIndex: {
498 const int string_index = cp->string_index_at(index);
499 check_property(valid_symbol_at(string_index),
500 "Invalid constant pool index %u in class file %s",
501 string_index, CHECK);
502 Symbol* const sym = cp->symbol_at(string_index);
503 cp->unresolved_string_at_put(index, sym);
504 break;
505 }
506 case JVM_CONSTANT_MethodHandle: {
507 const int ref_index = cp->method_handle_index_at(index);
508 check_property(valid_cp_range(ref_index, length),
509 "Invalid constant pool index %u in class file %s",
510 ref_index, CHECK);
511 const constantTag tag = cp->tag_at(ref_index);
512 const int ref_kind = cp->method_handle_ref_kind_at(index);
513
514 switch (ref_kind) {
515 case JVM_REF_getField:
516 case JVM_REF_getStatic:
517 case JVM_REF_putField:
518 case JVM_REF_putStatic: {
519 check_property(
520 tag.is_field(),
521 "Invalid constant pool index %u in class file %s (not a field)",
522 ref_index, CHECK);
523 break;
524 }
525 case JVM_REF_invokeVirtual:
526 case JVM_REF_newInvokeSpecial: {
527 check_property(
528 tag.is_method(),
529 "Invalid constant pool index %u in class file %s (not a method)",
530 ref_index, CHECK);
531 break;
532 }
533 case JVM_REF_invokeStatic:
534 case JVM_REF_invokeSpecial: {
535 check_property(
536 tag.is_method() ||
537 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
538 "Invalid constant pool index %u in class file %s (not a method)",
539 ref_index, CHECK);
540 break;
541 }
542 case JVM_REF_invokeInterface: {
543 check_property(
544 tag.is_interface_method(),
545 "Invalid constant pool index %u in class file %s (not an interface method)",
546 ref_index, CHECK);
547 break;
548 }
549 default: {
550 classfile_parse_error(
551 "Bad method handle kind at constant pool index %u in class file %s",
552 index, CHECK);
553 }
554 } // switch(refkind)
555 // Keep the ref_index unchanged. It will be indirected at link-time.
556 break;
557 } // case MethodHandle
558 case JVM_CONSTANT_MethodType: {
559 const int ref_index = cp->method_type_index_at(index);
560 check_property(valid_symbol_at(ref_index),
561 "Invalid constant pool index %u in class file %s",
562 ref_index, CHECK);
563 break;
564 }
565 case JVM_CONSTANT_Dynamic: {
566 const int name_and_type_ref_index =
567 cp->invoke_dynamic_name_and_type_ref_index_at(index);
568
569 check_property(valid_cp_range(name_and_type_ref_index, length) &&
570 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
571 "Invalid constant pool index %u in class file %s",
572 name_and_type_ref_index, CHECK);
573 // bootstrap specifier index must be checked later,
574 // when BootstrapMethods attr is available
575
576 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
577 cp->set_has_dynamic_constant();
578 break;
579 }
580 case JVM_CONSTANT_InvokeDynamic: {
581 const int name_and_type_ref_index =
582 cp->invoke_dynamic_name_and_type_ref_index_at(index);
583
584 check_property(valid_cp_range(name_and_type_ref_index, length) &&
585 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
586 "Invalid constant pool index %u in class file %s",
587 name_and_type_ref_index, CHECK);
588 // bootstrap specifier index must be checked later,
589 // when BootstrapMethods attr is available
590 break;
591 }
592 default: {
593 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
594 ShouldNotReachHere();
595 break;
596 }
597 } // switch(tag)
598 } // end of for
599
600 _first_patched_klass_resolved_index = num_klasses;
601 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
602
603 if (_cp_patches != NULL) {
604 // need to treat this_class specially...
605
606 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
607 // for now. These will be replaced with actual names of the patched classes in patch_class().
608 Symbol* s = vmSymbols::star_name();
609 for (int n=_orig_cp_size; n<cp->length(); n++) {
610 cp->symbol_at_put(n, s);
611 }
612
613 int this_class_index;
614 {
615 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
616 const u1* const mark = stream->current();
617 stream->skip_u2_fast(1); // skip flags
618 this_class_index = stream->get_u2_fast();
619 stream->set_current(mark); // revert to mark
620 }
621
622 for (index = 1; index < length; index++) { // Index 0 is unused
623 if (has_cp_patch_at(index)) {
624 guarantee_property(index != this_class_index,
625 "Illegal constant pool patch to self at %d in class file %s",
626 index, CHECK);
627 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
628 }
629 }
630 }
631
632 if (!_need_verify) {
633 return;
634 }
635
636 // second verification pass - checks the strings are of the right format.
637 // but not yet to the other entries
638 for (index = 1; index < length; index++) {
639 const jbyte tag = cp->tag_at(index).value();
640 switch (tag) {
641 case JVM_CONSTANT_UnresolvedClass: {
642 const Symbol* const class_name = cp->klass_name_at(index);
643 // check the name, even if _cp_patches will overwrite it
644 verify_legal_class_name(class_name, CHECK);
645 break;
646 }
647 case JVM_CONSTANT_NameAndType: {
648 if (_need_verify) {
649 const int sig_index = cp->signature_ref_index_at(index);
650 const int name_index = cp->name_ref_index_at(index);
651 const Symbol* const name = cp->symbol_at(name_index);
652 const Symbol* const sig = cp->symbol_at(sig_index);
653 guarantee_property(sig->utf8_length() != 0,
654 "Illegal zero length constant pool entry at %d in class %s",
655 sig_index, CHECK);
656 guarantee_property(name->utf8_length() != 0,
657 "Illegal zero length constant pool entry at %d in class %s",
658 name_index, CHECK);
659
660 if (sig->char_at(0) == JVM_SIGNATURE_FUNC) {
661 // Format check method name and signature
662 verify_legal_method_name(name, CHECK);
663 verify_legal_method_signature(name, sig, CHECK);
664 } else {
665 // Format check field name and signature
666 verify_legal_field_name(name, CHECK);
667 verify_legal_field_signature(name, sig, CHECK);
668 }
669 }
670 break;
671 }
672 case JVM_CONSTANT_Dynamic: {
673 const int name_and_type_ref_index =
674 cp->name_and_type_ref_index_at(index);
675 // already verified to be utf8
676 const int name_ref_index =
677 cp->name_ref_index_at(name_and_type_ref_index);
678 // already verified to be utf8
679 const int signature_ref_index =
680 cp->signature_ref_index_at(name_and_type_ref_index);
681 const Symbol* const name = cp->symbol_at(name_ref_index);
682 const Symbol* const signature = cp->symbol_at(signature_ref_index);
683 if (_need_verify) {
684 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
685 // Need only to be sure signature is non-zero length and the right type.
686 if (signature->utf8_length() == 0 ||
687 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
688 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
689 }
690 }
691 break;
692 }
693 case JVM_CONSTANT_InvokeDynamic:
694 case JVM_CONSTANT_Fieldref:
695 case JVM_CONSTANT_Methodref:
696 case JVM_CONSTANT_InterfaceMethodref: {
697 const int name_and_type_ref_index =
698 cp->name_and_type_ref_index_at(index);
699 // already verified to be utf8
700 const int name_ref_index =
701 cp->name_ref_index_at(name_and_type_ref_index);
702 // already verified to be utf8
703 const int signature_ref_index =
704 cp->signature_ref_index_at(name_and_type_ref_index);
705 const Symbol* const name = cp->symbol_at(name_ref_index);
706 const Symbol* const signature = cp->symbol_at(signature_ref_index);
707 if (tag == JVM_CONSTANT_Fieldref) {
708 if (_need_verify) {
709 // Field name and signature are verified above, when iterating NameAndType_info.
710 // Need only to be sure signature is non-zero length and the right type.
711 if (signature->utf8_length() == 0 ||
712 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
713 throwIllegalSignature("Field", name, signature, CHECK);
714 }
715 }
716 } else {
717 if (_need_verify) {
718 // Method name and signature are verified above, when iterating NameAndType_info.
719 // Need only to be sure signature is non-zero length and the right type.
720 if (signature->utf8_length() == 0 ||
721 signature->char_at(0) != JVM_SIGNATURE_FUNC) {
722 throwIllegalSignature("Method", name, signature, CHECK);
723 }
724 }
725 // 4509014: If a class method name begins with '<', it must be "<init>"
726 const unsigned int name_len = name->utf8_length();
727 if (tag == JVM_CONSTANT_Methodref &&
728 name_len != 0 &&
729 name->char_at(0) == '<' &&
730 name != vmSymbols::object_initializer_name()) {
731 classfile_parse_error(
732 "Bad method name at constant pool index %u in class file %s",
733 name_ref_index, CHECK);
734 }
735 }
736 break;
737 }
738 case JVM_CONSTANT_MethodHandle: {
739 const int ref_index = cp->method_handle_index_at(index);
740 const int ref_kind = cp->method_handle_ref_kind_at(index);
741 switch (ref_kind) {
742 case JVM_REF_invokeVirtual:
743 case JVM_REF_invokeStatic:
744 case JVM_REF_invokeSpecial:
745 case JVM_REF_newInvokeSpecial: {
746 const int name_and_type_ref_index =
747 cp->name_and_type_ref_index_at(ref_index);
748 const int name_ref_index =
749 cp->name_ref_index_at(name_and_type_ref_index);
750 const Symbol* const name = cp->symbol_at(name_ref_index);
751 if (ref_kind == JVM_REF_newInvokeSpecial) {
752 if (name != vmSymbols::object_initializer_name()) {
753 classfile_parse_error(
754 "Bad constructor name at constant pool index %u in class file %s",
755 name_ref_index, CHECK);
756 }
757 } else {
758 if (name == vmSymbols::object_initializer_name()) {
759 classfile_parse_error(
760 "Bad method name at constant pool index %u in class file %s",
761 name_ref_index, CHECK);
762 }
763 }
764 break;
765 }
766 // Other ref_kinds are already fully checked in previous pass.
767 } // switch(ref_kind)
768 break;
769 }
770 case JVM_CONSTANT_MethodType: {
771 const Symbol* const no_name = vmSymbols::type_name(); // place holder
772 const Symbol* const signature = cp->method_type_signature_at(index);
773 verify_legal_method_signature(no_name, signature, CHECK);
774 break;
775 }
776 case JVM_CONSTANT_Utf8: {
777 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
778 }
779 } // switch(tag)
780 } // end of for
781 }
782
783 Handle ClassFileParser::clear_cp_patch_at(int index) {
784 Handle patch = cp_patch_at(index);
785 _cp_patches->at_put(index, Handle());
786 assert(!has_cp_patch_at(index), "");
787 return patch;
788 }
789
790 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
791 int name_index = _orig_cp_size + _num_patched_klasses;
792 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
793
794 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
795 _num_patched_klasses ++;
796 }
797
798 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
799 int index,
800 Handle patch,
801 TRAPS) {
802 assert(cp != NULL, "invariant");
803
804 BasicType patch_type = T_VOID;
805
806 switch (cp->tag_at(index).value()) {
807
808 case JVM_CONSTANT_UnresolvedClass: {
809 // Patching a class means pre-resolving it.
810 // The name in the constant pool is ignored.
811 if (java_lang_Class::is_instance(patch())) {
812 guarantee_property(!java_lang_Class::is_primitive(patch()),
813 "Illegal class patch at %d in class file %s",
814 index, CHECK);
815 Klass* k = java_lang_Class::as_Klass(patch());
816 patch_class(cp, index, k, k->name());
817 } else {
818 guarantee_property(java_lang_String::is_instance(patch()),
819 "Illegal class patch at %d in class file %s",
820 index, CHECK);
821 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
822 patch_class(cp, index, NULL, name);
823 }
824 break;
825 }
826
827 case JVM_CONSTANT_String: {
828 // skip this patch and don't clear it. Needs the oop array for resolved
829 // references to be created first.
830 return;
831 }
832 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
833 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
834 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
835 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
836 patch_prim:
837 {
838 jvalue value;
839 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
840 guarantee_property(value_type == patch_type,
841 "Illegal primitive patch at %d in class file %s",
842 index, CHECK);
843 switch (value_type) {
844 case T_INT: cp->int_at_put(index, value.i); break;
845 case T_FLOAT: cp->float_at_put(index, value.f); break;
846 case T_LONG: cp->long_at_put(index, value.j); break;
847 case T_DOUBLE: cp->double_at_put(index, value.d); break;
848 default: assert(false, "");
849 }
850 } // end patch_prim label
851 break;
852
853 default: {
854 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
855 guarantee_property(!has_cp_patch_at(index),
856 "Illegal unexpected patch at %d in class file %s",
857 index, CHECK);
858 return;
859 }
860 } // end of switch(tag)
861
862 // On fall-through, mark the patch as used.
863 clear_cp_patch_at(index);
864 }
865 class NameSigHash: public ResourceObj {
866 public:
867 const Symbol* _name; // name
868 const Symbol* _sig; // signature
869 NameSigHash* _next; // Next entry in hash table
870 };
871
872 static const int HASH_ROW_SIZE = 256;
873
874 static unsigned int hash(const Symbol* name, const Symbol* sig) {
875 unsigned int raw_hash = 0;
876 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
877 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
878
879 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
880 }
881
882
883 static void initialize_hashtable(NameSigHash** table) {
884 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
885 }
886 // Return false if the name/sig combination is found in table.
887 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
888 // The old format checker uses heap sort to find duplicates.
889 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
890 // of table since we don't expect Symbol*'s to move.
891 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
892 assert(name != NULL, "name in constant pool is NULL");
893
894 // First lookup for duplicates
895 int index = hash(name, sig);
896 NameSigHash* entry = table[index];
897 while (entry != NULL) {
898 if (entry->_name == name && entry->_sig == sig) {
899 return false;
900 }
901 entry = entry->_next;
902 }
903
904 // No duplicate is found, allocate a new entry and fill it.
905 entry = new NameSigHash();
906 entry->_name = name;
907 entry->_sig = sig;
908
909 // Insert into hash table
910 entry->_next = table[index];
911 table[index] = entry;
912
913 return true;
914 }
915
916 // Side-effects: populates the _local_interfaces field
917 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
918 const int itfs_len,
919 ConstantPool* const cp,
920 bool* const has_nonstatic_concrete_methods,
921 TRAPS) {
922 assert(stream != NULL, "invariant");
923 assert(cp != NULL, "invariant");
924 assert(has_nonstatic_concrete_methods != NULL, "invariant");
925
926 if (itfs_len == 0) {
927 _local_interfaces = Universe::the_empty_instance_klass_array();
928 } else {
929 assert(itfs_len > 0, "only called for len>0");
930 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
931
932 int index;
933 for (index = 0; index < itfs_len; index++) {
934 const u2 interface_index = stream->get_u2(CHECK);
935 Klass* interf;
936 check_property(
937 valid_klass_reference_at(interface_index),
938 "Interface name has bad constant pool index %u in class file %s",
939 interface_index, CHECK);
940 if (cp->tag_at(interface_index).is_klass()) {
941 interf = cp->resolved_klass_at(interface_index);
942 } else {
943 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
944
945 // Don't need to check legal name because it's checked when parsing constant pool.
946 // But need to make sure it's not an array type.
947 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
948 "Bad interface name in class file %s", CHECK);
949
950 // Call resolve_super so classcircularity is checked
951 interf = SystemDictionary::resolve_super_or_fail(
952 _class_name,
953 unresolved_klass,
954 Handle(THREAD, _loader_data->class_loader()),
955 _protection_domain,
956 false,
957 CHECK);
958 }
959
960 if (!interf->is_interface()) {
961 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
962 err_msg("class %s can not implement %s, because it is not an interface (%s)",
963 _class_name->as_klass_external_name(),
964 interf->external_name(),
965 interf->class_in_module_of_loader()));
966 }
967
968 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
969 *has_nonstatic_concrete_methods = true;
970 }
971 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
972 }
973
974 if (!_need_verify || itfs_len <= 1) {
975 return;
976 }
977
978 // Check if there's any duplicates in interfaces
979 ResourceMark rm(THREAD);
980 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
981 NameSigHash*,
982 HASH_ROW_SIZE);
983 initialize_hashtable(interface_names);
984 bool dup = false;
985 const Symbol* name = NULL;
986 {
987 debug_only(NoSafepointVerifier nsv;)
988 for (index = 0; index < itfs_len; index++) {
989 const InstanceKlass* const k = _local_interfaces->at(index);
990 name = k->name();
991 // If no duplicates, add (name, NULL) in hashtable interface_names.
992 if (!put_after_lookup(name, NULL, interface_names)) {
993 dup = true;
994 break;
995 }
996 }
997 }
998 if (dup) {
999 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
1000 name->as_C_string(), CHECK);
1001 }
1002 }
1003 }
1004
1005 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
1006 int constantvalue_index,
1007 int signature_index,
1008 TRAPS) const {
1009 // Make sure the constant pool entry is of a type appropriate to this field
1010 guarantee_property(
1011 (constantvalue_index > 0 &&
1012 constantvalue_index < cp->length()),
1013 "Bad initial value index %u in ConstantValue attribute in class file %s",
1014 constantvalue_index, CHECK);
1015
1016 const constantTag value_type = cp->tag_at(constantvalue_index);
1017 switch(cp->basic_type_for_signature_at(signature_index)) {
1018 case T_LONG: {
1019 guarantee_property(value_type.is_long(),
1020 "Inconsistent constant value type in class file %s",
1021 CHECK);
1022 break;
1023 }
1024 case T_FLOAT: {
1025 guarantee_property(value_type.is_float(),
1026 "Inconsistent constant value type in class file %s",
1027 CHECK);
1028 break;
1029 }
1030 case T_DOUBLE: {
1031 guarantee_property(value_type.is_double(),
1032 "Inconsistent constant value type in class file %s",
1033 CHECK);
1034 break;
1035 }
1036 case T_BYTE:
1037 case T_CHAR:
1038 case T_SHORT:
1039 case T_BOOLEAN:
1040 case T_INT: {
1041 guarantee_property(value_type.is_int(),
1042 "Inconsistent constant value type in class file %s",
1043 CHECK);
1044 break;
1045 }
1046 case T_OBJECT: {
1047 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1048 && value_type.is_string()),
1049 "Bad string initial value in class file %s",
1050 CHECK);
1051 break;
1052 }
1053 default: {
1054 classfile_parse_error("Unable to set initial value %u in class file %s",
1055 constantvalue_index,
1056 CHECK);
1057 }
1058 }
1059 }
1060
1061 class AnnotationCollector : public ResourceObj{
1062 public:
1063 enum Location { _in_field, _in_method, _in_class };
1064 enum ID {
1065 _unknown = 0,
1066 _method_CallerSensitive,
1067 _method_ForceInline,
1068 _method_DontInline,
1069 _method_InjectedProfile,
1070 _method_LambdaForm_Compiled,
1071 _method_Hidden,
1072 _method_HotSpotIntrinsicCandidate,
1073 _jdk_internal_vm_annotation_Contended,
1074 _field_Stable,
1075 _jdk_internal_vm_annotation_ReservedStackAccess,
1076 _annotation_LIMIT
1077 };
1078 const Location _location;
1079 int _annotations_present;
1080 u2 _contended_group;
1081
1082 AnnotationCollector(Location location)
1083 : _location(location), _annotations_present(0)
1084 {
1085 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1086 }
1087 // If this annotation name has an ID, report it (or _none).
1088 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1089 // Set the annotation name:
1090 void set_annotation(ID id) {
1091 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1092 _annotations_present |= nth_bit((int)id);
1093 }
1094
1095 void remove_annotation(ID id) {
1096 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1097 _annotations_present &= ~nth_bit((int)id);
1098 }
1099
1100 // Report if the annotation is present.
1101 bool has_any_annotations() const { return _annotations_present != 0; }
1102 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1103
1104 void set_contended_group(u2 group) { _contended_group = group; }
1105 u2 contended_group() const { return _contended_group; }
1106
1107 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1108
1109 void set_stable(bool stable) { set_annotation(_field_Stable); }
1110 bool is_stable() const { return has_annotation(_field_Stable); }
1111 };
1112
1113 // This class also doubles as a holder for metadata cleanup.
1114 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1115 private:
1116 ClassLoaderData* _loader_data;
1117 AnnotationArray* _field_annotations;
1118 AnnotationArray* _field_type_annotations;
1119 public:
1120 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1121 AnnotationCollector(_in_field),
1122 _loader_data(loader_data),
1123 _field_annotations(NULL),
1124 _field_type_annotations(NULL) {}
1125 ~FieldAnnotationCollector();
1126 void apply_to(FieldInfo* f);
1127 AnnotationArray* field_annotations() { return _field_annotations; }
1128 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1129
1130 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1131 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1132 };
1133
1134 class MethodAnnotationCollector : public AnnotationCollector{
1135 public:
1136 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1137 void apply_to(const methodHandle& m);
1138 };
1139
1140 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1141 public:
1142 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1143 void apply_to(InstanceKlass* ik);
1144 };
1145
1146
1147 static int skip_annotation_value(const u1*, int, int); // fwd decl
1148
1149 // Safely increment index by val if does not pass limit
1150 #define SAFE_ADD(index, limit, val) \
1151 if (index >= limit - val) return limit; \
1152 index += val;
1153
1154 // Skip an annotation. Return >=limit if there is any problem.
1155 static int skip_annotation(const u1* buffer, int limit, int index) {
1156 assert(buffer != NULL, "invariant");
1157 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1158 // value := switch (tag:u1) { ... }
1159 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1160 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1161 while (--nmem >= 0 && index < limit) {
1162 SAFE_ADD(index, limit, 2); // skip member
1163 index = skip_annotation_value(buffer, limit, index);
1164 }
1165 return index;
1166 }
1167
1168 // Skip an annotation value. Return >=limit if there is any problem.
1169 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1170 assert(buffer != NULL, "invariant");
1171
1172 // value := switch (tag:u1) {
1173 // case B, C, I, S, Z, D, F, J, c: con:u2;
1174 // case e: e_class:u2 e_name:u2;
1175 // case s: s_con:u2;
1176 // case [: do(nval:u2) {value};
1177 // case @: annotation;
1178 // case s: s_con:u2;
1179 // }
1180 SAFE_ADD(index, limit, 1); // read tag
1181 const u1 tag = buffer[index - 1];
1182 switch (tag) {
1183 case 'B':
1184 case 'C':
1185 case 'I':
1186 case 'S':
1187 case 'Z':
1188 case 'D':
1189 case 'F':
1190 case 'J':
1191 case 'c':
1192 case 's':
1193 SAFE_ADD(index, limit, 2); // skip con or s_con
1194 break;
1195 case 'e':
1196 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1197 break;
1198 case '[':
1199 {
1200 SAFE_ADD(index, limit, 2); // read nval
1201 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1202 while (--nval >= 0 && index < limit) {
1203 index = skip_annotation_value(buffer, limit, index);
1204 }
1205 }
1206 break;
1207 case '@':
1208 index = skip_annotation(buffer, limit, index);
1209 break;
1210 default:
1211 return limit; // bad tag byte
1212 }
1213 return index;
1214 }
1215
1216 // Sift through annotations, looking for those significant to the VM:
1217 static void parse_annotations(const ConstantPool* const cp,
1218 const u1* buffer, int limit,
1219 AnnotationCollector* coll,
1220 ClassLoaderData* loader_data,
1221 TRAPS) {
1222
1223 assert(cp != NULL, "invariant");
1224 assert(buffer != NULL, "invariant");
1225 assert(coll != NULL, "invariant");
1226 assert(loader_data != NULL, "invariant");
1227
1228 // annotations := do(nann:u2) {annotation}
1229 int index = 2; // read nann
1230 if (index >= limit) return;
1231 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1232 enum { // initial annotation layout
1233 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1234 count_off = 2, // u2 such as 1 (one value)
1235 member_off = 4, // utf8 such as 'value'
1236 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1237 e_tag_val = 'e',
1238 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1239 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1240 e_size = 11, // end of 'e' annotation
1241 c_tag_val = 'c', // payload is type
1242 c_con_off = 7, // utf8 payload, such as 'I'
1243 c_size = 9, // end of 'c' annotation
1244 s_tag_val = 's', // payload is String
1245 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1246 s_size = 9,
1247 min_size = 6 // smallest possible size (zero members)
1248 };
1249 // Cannot add min_size to index in case of overflow MAX_INT
1250 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1251 int index0 = index;
1252 index = skip_annotation(buffer, limit, index);
1253 const u1* const abase = buffer + index0;
1254 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1255 const int count = Bytes::get_Java_u2((address)abase + count_off);
1256 const Symbol* const aname = check_symbol_at(cp, atype);
1257 if (aname == NULL) break; // invalid annotation name
1258 const Symbol* member = NULL;
1259 if (count >= 1) {
1260 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1261 member = check_symbol_at(cp, member_index);
1262 if (member == NULL) break; // invalid member name
1263 }
1264
1265 // Here is where parsing particular annotations will take place.
1266 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1267 if (AnnotationCollector::_unknown == id) continue;
1268 coll->set_annotation(id);
1269
1270 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1271 // @Contended can optionally specify the contention group.
1272 //
1273 // Contended group defines the equivalence class over the fields:
1274 // the fields within the same contended group are not treated distinct.
1275 // The only exception is default group, which does not incur the
1276 // equivalence. Naturally, contention group for classes is meaningless.
1277 //
1278 // While the contention group is specified as String, annotation
1279 // values are already interned, and we might as well use the constant
1280 // pool index as the group tag.
1281 //
1282 u2 group_index = 0; // default contended group
1283 if (count == 1
1284 && s_size == (index - index0) // match size
1285 && s_tag_val == *(abase + tag_off)
1286 && member == vmSymbols::value_name()) {
1287 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1288 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1289 group_index = 0; // default contended group
1290 }
1291 }
1292 coll->set_contended_group(group_index);
1293 }
1294 }
1295 }
1296
1297
1298 // Parse attributes for a field.
1299 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1300 u2 attributes_count,
1301 bool is_static, u2 signature_index,
1302 u2* const constantvalue_index_addr,
1303 bool* const is_synthetic_addr,
1304 u2* const generic_signature_index_addr,
1305 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1306 TRAPS) {
1307 assert(cfs != NULL, "invariant");
1308 assert(constantvalue_index_addr != NULL, "invariant");
1309 assert(is_synthetic_addr != NULL, "invariant");
1310 assert(generic_signature_index_addr != NULL, "invariant");
1311 assert(parsed_annotations != NULL, "invariant");
1312 assert(attributes_count > 0, "attributes_count should be greater than 0");
1313
1314 u2 constantvalue_index = 0;
1315 u2 generic_signature_index = 0;
1316 bool is_synthetic = false;
1317 const u1* runtime_visible_annotations = NULL;
1318 int runtime_visible_annotations_length = 0;
1319 const u1* runtime_invisible_annotations = NULL;
1320 int runtime_invisible_annotations_length = 0;
1321 const u1* runtime_visible_type_annotations = NULL;
1322 int runtime_visible_type_annotations_length = 0;
1323 const u1* runtime_invisible_type_annotations = NULL;
1324 int runtime_invisible_type_annotations_length = 0;
1325 bool runtime_invisible_annotations_exists = false;
1326 bool runtime_invisible_type_annotations_exists = false;
1327 const ConstantPool* const cp = _cp;
1328
1329 while (attributes_count--) {
1330 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1331 const u2 attribute_name_index = cfs->get_u2_fast();
1332 const u4 attribute_length = cfs->get_u4_fast();
1333 check_property(valid_symbol_at(attribute_name_index),
1334 "Invalid field attribute index %u in class file %s",
1335 attribute_name_index,
1336 CHECK);
1337
1338 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1339 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1340 // ignore if non-static
1341 if (constantvalue_index != 0) {
1342 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1343 }
1344 check_property(
1345 attribute_length == 2,
1346 "Invalid ConstantValue field attribute length %u in class file %s",
1347 attribute_length, CHECK);
1348
1349 constantvalue_index = cfs->get_u2(CHECK);
1350 if (_need_verify) {
1351 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1352 }
1353 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1354 if (attribute_length != 0) {
1355 classfile_parse_error(
1356 "Invalid Synthetic field attribute length %u in class file %s",
1357 attribute_length, CHECK);
1358 }
1359 is_synthetic = true;
1360 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1361 if (attribute_length != 0) {
1362 classfile_parse_error(
1363 "Invalid Deprecated field attribute length %u in class file %s",
1364 attribute_length, CHECK);
1365 }
1366 } else if (_major_version >= JAVA_1_5_VERSION) {
1367 if (attribute_name == vmSymbols::tag_signature()) {
1368 if (generic_signature_index != 0) {
1369 classfile_parse_error(
1370 "Multiple Signature attributes for field in class file %s", CHECK);
1371 }
1372 if (attribute_length != 2) {
1373 classfile_parse_error(
1374 "Wrong size %u for field's Signature attribute in class file %s",
1375 attribute_length, CHECK);
1376 }
1377 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1378 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1379 if (runtime_visible_annotations != NULL) {
1380 classfile_parse_error(
1381 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1382 }
1383 runtime_visible_annotations_length = attribute_length;
1384 runtime_visible_annotations = cfs->current();
1385 assert(runtime_visible_annotations != NULL, "null visible annotations");
1386 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1387 parse_annotations(cp,
1388 runtime_visible_annotations,
1389 runtime_visible_annotations_length,
1390 parsed_annotations,
1391 _loader_data,
1392 CHECK);
1393 cfs->skip_u1_fast(runtime_visible_annotations_length);
1394 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1395 if (runtime_invisible_annotations_exists) {
1396 classfile_parse_error(
1397 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1398 }
1399 runtime_invisible_annotations_exists = true;
1400 if (PreserveAllAnnotations) {
1401 runtime_invisible_annotations_length = attribute_length;
1402 runtime_invisible_annotations = cfs->current();
1403 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1404 }
1405 cfs->skip_u1(attribute_length, CHECK);
1406 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1407 if (runtime_visible_type_annotations != NULL) {
1408 classfile_parse_error(
1409 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1410 }
1411 runtime_visible_type_annotations_length = attribute_length;
1412 runtime_visible_type_annotations = cfs->current();
1413 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1414 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1415 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1416 if (runtime_invisible_type_annotations_exists) {
1417 classfile_parse_error(
1418 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1419 } else {
1420 runtime_invisible_type_annotations_exists = true;
1421 }
1422 if (PreserveAllAnnotations) {
1423 runtime_invisible_type_annotations_length = attribute_length;
1424 runtime_invisible_type_annotations = cfs->current();
1425 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1426 }
1427 cfs->skip_u1(attribute_length, CHECK);
1428 } else {
1429 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1430 }
1431 } else {
1432 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1433 }
1434 }
1435
1436 *constantvalue_index_addr = constantvalue_index;
1437 *is_synthetic_addr = is_synthetic;
1438 *generic_signature_index_addr = generic_signature_index;
1439 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1440 runtime_visible_annotations_length,
1441 runtime_invisible_annotations,
1442 runtime_invisible_annotations_length,
1443 CHECK);
1444 parsed_annotations->set_field_annotations(a);
1445 a = assemble_annotations(runtime_visible_type_annotations,
1446 runtime_visible_type_annotations_length,
1447 runtime_invisible_type_annotations,
1448 runtime_invisible_type_annotations_length,
1449 CHECK);
1450 parsed_annotations->set_field_type_annotations(a);
1451 return;
1452 }
1453
1454
1455 // Field allocation types. Used for computing field offsets.
1456
1457 enum FieldAllocationType {
1458 STATIC_OOP, // Oops
1459 STATIC_BYTE, // Boolean, Byte, char
1460 STATIC_SHORT, // shorts
1461 STATIC_WORD, // ints
1462 STATIC_DOUBLE, // aligned long or double
1463 NONSTATIC_OOP,
1464 NONSTATIC_BYTE,
1465 NONSTATIC_SHORT,
1466 NONSTATIC_WORD,
1467 NONSTATIC_DOUBLE,
1468 MAX_FIELD_ALLOCATION_TYPE,
1469 BAD_ALLOCATION_TYPE = -1
1470 };
1471
1472 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1473 BAD_ALLOCATION_TYPE, // 0
1474 BAD_ALLOCATION_TYPE, // 1
1475 BAD_ALLOCATION_TYPE, // 2
1476 BAD_ALLOCATION_TYPE, // 3
1477 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1478 NONSTATIC_SHORT, // T_CHAR = 5,
1479 NONSTATIC_WORD, // T_FLOAT = 6,
1480 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1481 NONSTATIC_BYTE, // T_BYTE = 8,
1482 NONSTATIC_SHORT, // T_SHORT = 9,
1483 NONSTATIC_WORD, // T_INT = 10,
1484 NONSTATIC_DOUBLE, // T_LONG = 11,
1485 NONSTATIC_OOP, // T_OBJECT = 12,
1486 NONSTATIC_OOP, // T_ARRAY = 13,
1487 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1488 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1489 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1490 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1491 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1492 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1493 BAD_ALLOCATION_TYPE, // 0
1494 BAD_ALLOCATION_TYPE, // 1
1495 BAD_ALLOCATION_TYPE, // 2
1496 BAD_ALLOCATION_TYPE, // 3
1497 STATIC_BYTE , // T_BOOLEAN = 4,
1498 STATIC_SHORT, // T_CHAR = 5,
1499 STATIC_WORD, // T_FLOAT = 6,
1500 STATIC_DOUBLE, // T_DOUBLE = 7,
1501 STATIC_BYTE, // T_BYTE = 8,
1502 STATIC_SHORT, // T_SHORT = 9,
1503 STATIC_WORD, // T_INT = 10,
1504 STATIC_DOUBLE, // T_LONG = 11,
1505 STATIC_OOP, // T_OBJECT = 12,
1506 STATIC_OOP, // T_ARRAY = 13,
1507 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1508 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1509 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1510 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1511 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1512 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1513 };
1514
1515 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1516 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1517 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1518 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1519 return result;
1520 }
1521
1522 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1523 public:
1524 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1525
1526 FieldAllocationCount() {
1527 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1528 count[i] = 0;
1529 }
1530 }
1531
1532 FieldAllocationType update(bool is_static, BasicType type) {
1533 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1534 if (atype != BAD_ALLOCATION_TYPE) {
1535 // Make sure there is no overflow with injected fields.
1536 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1537 count[atype]++;
1538 }
1539 return atype;
1540 }
1541 };
1542
1543 // Side-effects: populates the _fields, _fields_annotations,
1544 // _fields_type_annotations fields
1545 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1546 bool is_interface,
1547 FieldAllocationCount* const fac,
1548 ConstantPool* cp,
1549 const int cp_size,
1550 u2* const java_fields_count_ptr,
1551 TRAPS) {
1552
1553 assert(cfs != NULL, "invariant");
1554 assert(fac != NULL, "invariant");
1555 assert(cp != NULL, "invariant");
1556 assert(java_fields_count_ptr != NULL, "invariant");
1557
1558 assert(NULL == _fields, "invariant");
1559 assert(NULL == _fields_annotations, "invariant");
1560 assert(NULL == _fields_type_annotations, "invariant");
1561
1562 cfs->guarantee_more(2, CHECK); // length
1563 const u2 length = cfs->get_u2_fast();
1564 *java_fields_count_ptr = length;
1565
1566 int num_injected = 0;
1567 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1568 &num_injected);
1569 const int total_fields = length + num_injected;
1570
1571 // The field array starts with tuples of shorts
1572 // [access, name index, sig index, initial value index, byte offset].
1573 // A generic signature slot only exists for field with generic
1574 // signature attribute. And the access flag is set with
1575 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1576 // signature slots are at the end of the field array and after all
1577 // other fields data.
1578 //
1579 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1580 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1581 // ...
1582 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1583 // [generic signature index]
1584 // [generic signature index]
1585 // ...
1586 //
1587 // Allocate a temporary resource array for field data. For each field,
1588 // a slot is reserved in the temporary array for the generic signature
1589 // index. After parsing all fields, the data are copied to a permanent
1590 // array and any unused slots will be discarded.
1591 ResourceMark rm(THREAD);
1592 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1593 u2,
1594 total_fields * (FieldInfo::field_slots + 1));
1595
1596 // The generic signature slots start after all other fields' data.
1597 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1598 int num_generic_signature = 0;
1599 for (int n = 0; n < length; n++) {
1600 // access_flags, name_index, descriptor_index, attributes_count
1601 cfs->guarantee_more(8, CHECK);
1602
1603 AccessFlags access_flags;
1604 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1605 verify_legal_field_modifiers(flags, is_interface, CHECK);
1606 access_flags.set_flags(flags);
1607
1608 const u2 name_index = cfs->get_u2_fast();
1609 check_property(valid_symbol_at(name_index),
1610 "Invalid constant pool index %u for field name in class file %s",
1611 name_index, CHECK);
1612 const Symbol* const name = cp->symbol_at(name_index);
1613 verify_legal_field_name(name, CHECK);
1614
1615 const u2 signature_index = cfs->get_u2_fast();
1616 check_property(valid_symbol_at(signature_index),
1617 "Invalid constant pool index %u for field signature in class file %s",
1618 signature_index, CHECK);
1619 const Symbol* const sig = cp->symbol_at(signature_index);
1620 verify_legal_field_signature(name, sig, CHECK);
1621
1622 u2 constantvalue_index = 0;
1623 bool is_synthetic = false;
1624 u2 generic_signature_index = 0;
1625 const bool is_static = access_flags.is_static();
1626 FieldAnnotationCollector parsed_annotations(_loader_data);
1627
1628 const u2 attributes_count = cfs->get_u2_fast();
1629 if (attributes_count > 0) {
1630 parse_field_attributes(cfs,
1631 attributes_count,
1632 is_static,
1633 signature_index,
1634 &constantvalue_index,
1635 &is_synthetic,
1636 &generic_signature_index,
1637 &parsed_annotations,
1638 CHECK);
1639
1640 if (parsed_annotations.field_annotations() != NULL) {
1641 if (_fields_annotations == NULL) {
1642 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1643 _loader_data, length, NULL,
1644 CHECK);
1645 }
1646 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1647 parsed_annotations.set_field_annotations(NULL);
1648 }
1649 if (parsed_annotations.field_type_annotations() != NULL) {
1650 if (_fields_type_annotations == NULL) {
1651 _fields_type_annotations =
1652 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1653 length,
1654 NULL,
1655 CHECK);
1656 }
1657 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1658 parsed_annotations.set_field_type_annotations(NULL);
1659 }
1660
1661 if (is_synthetic) {
1662 access_flags.set_is_synthetic();
1663 }
1664 if (generic_signature_index != 0) {
1665 access_flags.set_field_has_generic_signature();
1666 fa[generic_signature_slot] = generic_signature_index;
1667 generic_signature_slot ++;
1668 num_generic_signature ++;
1669 }
1670 }
1671
1672 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1673 field->initialize(access_flags.as_short(),
1674 name_index,
1675 signature_index,
1676 constantvalue_index);
1677 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1678
1679 // Remember how many oops we encountered and compute allocation type
1680 const FieldAllocationType atype = fac->update(is_static, type);
1681 field->set_allocation_type(atype);
1682
1683 // After field is initialized with type, we can augment it with aux info
1684 if (parsed_annotations.has_any_annotations())
1685 parsed_annotations.apply_to(field);
1686 }
1687
1688 int index = length;
1689 if (num_injected != 0) {
1690 for (int n = 0; n < num_injected; n++) {
1691 // Check for duplicates
1692 if (injected[n].may_be_java) {
1693 const Symbol* const name = injected[n].name();
1694 const Symbol* const signature = injected[n].signature();
1695 bool duplicate = false;
1696 for (int i = 0; i < length; i++) {
1697 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1698 if (name == cp->symbol_at(f->name_index()) &&
1699 signature == cp->symbol_at(f->signature_index())) {
1700 // Symbol is desclared in Java so skip this one
1701 duplicate = true;
1702 break;
1703 }
1704 }
1705 if (duplicate) {
1706 // These will be removed from the field array at the end
1707 continue;
1708 }
1709 }
1710
1711 // Injected field
1712 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1713 field->initialize(JVM_ACC_FIELD_INTERNAL,
1714 injected[n].name_index,
1715 injected[n].signature_index,
1716 0);
1717
1718 const BasicType type = FieldType::basic_type(injected[n].signature());
1719
1720 // Remember how many oops we encountered and compute allocation type
1721 const FieldAllocationType atype = fac->update(false, type);
1722 field->set_allocation_type(atype);
1723 index++;
1724 }
1725 }
1726
1727 assert(NULL == _fields, "invariant");
1728
1729 _fields =
1730 MetadataFactory::new_array<u2>(_loader_data,
1731 index * FieldInfo::field_slots + num_generic_signature,
1732 CHECK);
1733 // Sometimes injected fields already exist in the Java source so
1734 // the fields array could be too long. In that case the
1735 // fields array is trimed. Also unused slots that were reserved
1736 // for generic signature indexes are discarded.
1737 {
1738 int i = 0;
1739 for (; i < index * FieldInfo::field_slots; i++) {
1740 _fields->at_put(i, fa[i]);
1741 }
1742 for (int j = total_fields * FieldInfo::field_slots;
1743 j < generic_signature_slot; j++) {
1744 _fields->at_put(i++, fa[j]);
1745 }
1746 assert(_fields->length() == i, "");
1747 }
1748
1749 if (_need_verify && length > 1) {
1750 // Check duplicated fields
1751 ResourceMark rm(THREAD);
1752 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1753 THREAD, NameSigHash*, HASH_ROW_SIZE);
1754 initialize_hashtable(names_and_sigs);
1755 bool dup = false;
1756 const Symbol* name = NULL;
1757 const Symbol* sig = NULL;
1758 {
1759 debug_only(NoSafepointVerifier nsv;)
1760 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1761 name = fs.name();
1762 sig = fs.signature();
1763 // If no duplicates, add name/signature in hashtable names_and_sigs.
1764 if (!put_after_lookup(name, sig, names_and_sigs)) {
1765 dup = true;
1766 break;
1767 }
1768 }
1769 }
1770 if (dup) {
1771 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1772 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1773 }
1774 }
1775 }
1776
1777
1778 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1779 u4 code_length,
1780 u4 exception_table_length,
1781 TRAPS) {
1782 assert(cfs != NULL, "invariant");
1783
1784 const unsafe_u2* const exception_table_start = cfs->current();
1785 assert(exception_table_start != NULL, "null exception table");
1786
1787 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1788 // end_pc,
1789 // handler_pc,
1790 // catch_type_index
1791
1792 // Will check legal target after parsing code array in verifier.
1793 if (_need_verify) {
1794 for (unsigned int i = 0; i < exception_table_length; i++) {
1795 const u2 start_pc = cfs->get_u2_fast();
1796 const u2 end_pc = cfs->get_u2_fast();
1797 const u2 handler_pc = cfs->get_u2_fast();
1798 const u2 catch_type_index = cfs->get_u2_fast();
1799 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1800 "Illegal exception table range in class file %s",
1801 CHECK_NULL);
1802 guarantee_property(handler_pc < code_length,
1803 "Illegal exception table handler in class file %s",
1804 CHECK_NULL);
1805 if (catch_type_index != 0) {
1806 guarantee_property(valid_klass_reference_at(catch_type_index),
1807 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1808 }
1809 }
1810 } else {
1811 cfs->skip_u2_fast(exception_table_length * 4);
1812 }
1813 return exception_table_start;
1814 }
1815
1816 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1817 u4 code_length,
1818 CompressedLineNumberWriteStream**const write_stream,
1819 TRAPS) {
1820
1821 const ClassFileStream* const cfs = _stream;
1822 unsigned int num_entries = cfs->get_u2(CHECK);
1823
1824 // Each entry is a u2 start_pc, and a u2 line_number
1825 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1826
1827 // Verify line number attribute and table length
1828 check_property(
1829 code_attribute_length == sizeof(u2) + length_in_bytes,
1830 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1831
1832 cfs->guarantee_more(length_in_bytes, CHECK);
1833
1834 if ((*write_stream) == NULL) {
1835 if (length_in_bytes > fixed_buffer_size) {
1836 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1837 } else {
1838 (*write_stream) = new CompressedLineNumberWriteStream(
1839 _linenumbertable_buffer, fixed_buffer_size);
1840 }
1841 }
1842
1843 while (num_entries-- > 0) {
1844 const u2 bci = cfs->get_u2_fast(); // start_pc
1845 const u2 line = cfs->get_u2_fast(); // line_number
1846 guarantee_property(bci < code_length,
1847 "Invalid pc in LineNumberTable in class file %s", CHECK);
1848 (*write_stream)->write_pair(bci, line);
1849 }
1850 }
1851
1852
1853 class LVT_Hash : public AllStatic {
1854 public:
1855
1856 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1857 /*
1858 * 3-tuple start_bci/length/slot has to be unique key,
1859 * so the following comparison seems to be redundant:
1860 * && elem->name_cp_index == entry->_elem->name_cp_index
1861 */
1862 return (e0.start_bci == e1.start_bci &&
1863 e0.length == e1.length &&
1864 e0.name_cp_index == e1.name_cp_index &&
1865 e0.slot == e1.slot);
1866 }
1867
1868 static unsigned int hash(LocalVariableTableElement const& e0) {
1869 unsigned int raw_hash = e0.start_bci;
1870
1871 raw_hash = e0.length + raw_hash * 37;
1872 raw_hash = e0.name_cp_index + raw_hash * 37;
1873 raw_hash = e0.slot + raw_hash * 37;
1874
1875 return raw_hash;
1876 }
1877 };
1878
1879
1880 // Class file LocalVariableTable elements.
1881 class Classfile_LVT_Element {
1882 public:
1883 u2 start_bci;
1884 u2 length;
1885 u2 name_cp_index;
1886 u2 descriptor_cp_index;
1887 u2 slot;
1888 };
1889
1890 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1891 LocalVariableTableElement* const lvt) {
1892 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1893 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1894 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1895 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1896 lvt->signature_cp_index = 0;
1897 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1898 }
1899
1900 // Function is used to parse both attributes:
1901 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1902 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1903 u4 code_length,
1904 u2 max_locals,
1905 u4 code_attribute_length,
1906 u2* const localvariable_table_length,
1907 bool isLVTT,
1908 TRAPS) {
1909 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1910 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1911 const unsigned int size =
1912 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1913
1914 const ConstantPool* const cp = _cp;
1915
1916 // Verify local variable table attribute has right length
1917 if (_need_verify) {
1918 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1919 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1920 }
1921
1922 const unsafe_u2* const localvariable_table_start = cfs->current();
1923 assert(localvariable_table_start != NULL, "null local variable table");
1924 if (!_need_verify) {
1925 cfs->skip_u2_fast(size);
1926 } else {
1927 cfs->guarantee_more(size * 2, CHECK_NULL);
1928 for(int i = 0; i < (*localvariable_table_length); i++) {
1929 const u2 start_pc = cfs->get_u2_fast();
1930 const u2 length = cfs->get_u2_fast();
1931 const u2 name_index = cfs->get_u2_fast();
1932 const u2 descriptor_index = cfs->get_u2_fast();
1933 const u2 index = cfs->get_u2_fast();
1934 // Assign to a u4 to avoid overflow
1935 const u4 end_pc = (u4)start_pc + (u4)length;
1936
1937 if (start_pc >= code_length) {
1938 classfile_parse_error(
1939 "Invalid start_pc %u in %s in class file %s",
1940 start_pc, tbl_name, CHECK_NULL);
1941 }
1942 if (end_pc > code_length) {
1943 classfile_parse_error(
1944 "Invalid length %u in %s in class file %s",
1945 length, tbl_name, CHECK_NULL);
1946 }
1947 const int cp_size = cp->length();
1948 guarantee_property(valid_symbol_at(name_index),
1949 "Name index %u in %s has bad constant type in class file %s",
1950 name_index, tbl_name, CHECK_NULL);
1951 guarantee_property(valid_symbol_at(descriptor_index),
1952 "Signature index %u in %s has bad constant type in class file %s",
1953 descriptor_index, tbl_name, CHECK_NULL);
1954
1955 const Symbol* const name = cp->symbol_at(name_index);
1956 const Symbol* const sig = cp->symbol_at(descriptor_index);
1957 verify_legal_field_name(name, CHECK_NULL);
1958 u2 extra_slot = 0;
1959 if (!isLVTT) {
1960 verify_legal_field_signature(name, sig, CHECK_NULL);
1961
1962 // 4894874: check special cases for double and long local variables
1963 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1964 sig == vmSymbols::type_signature(T_LONG)) {
1965 extra_slot = 1;
1966 }
1967 }
1968 guarantee_property((index + extra_slot) < max_locals,
1969 "Invalid index %u in %s in class file %s",
1970 index, tbl_name, CHECK_NULL);
1971 }
1972 }
1973 return localvariable_table_start;
1974 }
1975
1976
1977 void ClassFileParser::parse_type_array(u2 array_length,
1978 u4 code_length,
1979 u4* const u1_index,
1980 u4* const u2_index,
1981 u1* const u1_array,
1982 u2* const u2_array,
1983 TRAPS) {
1984 const ClassFileStream* const cfs = _stream;
1985 u2 index = 0; // index in the array with long/double occupying two slots
1986 u4 i1 = *u1_index;
1987 u4 i2 = *u2_index + 1;
1988 for(int i = 0; i < array_length; i++) {
1989 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1990 index++;
1991 if (tag == ITEM_Long || tag == ITEM_Double) {
1992 index++;
1993 } else if (tag == ITEM_Object) {
1994 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1995 guarantee_property(valid_klass_reference_at(class_index),
1996 "Bad class index %u in StackMap in class file %s",
1997 class_index, CHECK);
1998 } else if (tag == ITEM_Uninitialized) {
1999 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
2000 guarantee_property(
2001 offset < code_length,
2002 "Bad uninitialized type offset %u in StackMap in class file %s",
2003 offset, CHECK);
2004 } else {
2005 guarantee_property(
2006 tag <= (u1)ITEM_Uninitialized,
2007 "Unknown variable type %u in StackMap in class file %s",
2008 tag, CHECK);
2009 }
2010 }
2011 u2_array[*u2_index] = index;
2012 *u1_index = i1;
2013 *u2_index = i2;
2014 }
2015
2016 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
2017 u4 code_attribute_length,
2018 bool need_verify,
2019 TRAPS) {
2020 assert(cfs != NULL, "invariant");
2021
2022 if (0 == code_attribute_length) {
2023 return NULL;
2024 }
2025
2026 const u1* const stackmap_table_start = cfs->current();
2027 assert(stackmap_table_start != NULL, "null stackmap table");
2028
2029 // check code_attribute_length first
2030 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2031
2032 if (!need_verify && !DumpSharedSpaces) {
2033 return NULL;
2034 }
2035 return stackmap_table_start;
2036 }
2037
2038 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2039 u2* const checked_exceptions_length,
2040 u4 method_attribute_length,
2041 TRAPS) {
2042 assert(cfs != NULL, "invariant");
2043 assert(checked_exceptions_length != NULL, "invariant");
2044
2045 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2046 *checked_exceptions_length = cfs->get_u2_fast();
2047 const unsigned int size =
2048 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2049 const unsafe_u2* const checked_exceptions_start = cfs->current();
2050 assert(checked_exceptions_start != NULL, "null checked exceptions");
2051 if (!_need_verify) {
2052 cfs->skip_u2_fast(size);
2053 } else {
2054 // Verify each value in the checked exception table
2055 u2 checked_exception;
2056 const u2 len = *checked_exceptions_length;
2057 cfs->guarantee_more(2 * len, CHECK_NULL);
2058 for (int i = 0; i < len; i++) {
2059 checked_exception = cfs->get_u2_fast();
2060 check_property(
2061 valid_klass_reference_at(checked_exception),
2062 "Exception name has bad type at constant pool %u in class file %s",
2063 checked_exception, CHECK_NULL);
2064 }
2065 }
2066 // check exceptions attribute length
2067 if (_need_verify) {
2068 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2069 sizeof(u2) * size),
2070 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2071 }
2072 return checked_exceptions_start;
2073 }
2074
2075 void ClassFileParser::throwIllegalSignature(const char* type,
2076 const Symbol* name,
2077 const Symbol* sig,
2078 TRAPS) const {
2079 assert(name != NULL, "invariant");
2080 assert(sig != NULL, "invariant");
2081
2082 ResourceMark rm(THREAD);
2083 Exceptions::fthrow(THREAD_AND_LOCATION,
2084 vmSymbols::java_lang_ClassFormatError(),
2085 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2086 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2087 }
2088
2089 AnnotationCollector::ID
2090 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2091 const Symbol* name) {
2092 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2093 // Privileged code can use all annotations. Other code silently drops some.
2094 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2095 loader_data->is_platform_class_loader_data() ||
2096 loader_data->is_unsafe_anonymous();
2097 switch (sid) {
2098 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2099 if (_location != _in_method) break; // only allow for methods
2100 if (!privileged) break; // only allow in privileged code
2101 return _method_CallerSensitive;
2102 }
2103 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2104 if (_location != _in_method) break; // only allow for methods
2105 if (!privileged) break; // only allow in privileged code
2106 return _method_ForceInline;
2107 }
2108 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2109 if (_location != _in_method) break; // only allow for methods
2110 if (!privileged) break; // only allow in privileged code
2111 return _method_DontInline;
2112 }
2113 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2114 if (_location != _in_method) break; // only allow for methods
2115 if (!privileged) break; // only allow in privileged code
2116 return _method_InjectedProfile;
2117 }
2118 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2119 if (_location != _in_method) break; // only allow for methods
2120 if (!privileged) break; // only allow in privileged code
2121 return _method_LambdaForm_Compiled;
2122 }
2123 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
2124 if (_location != _in_method) break; // only allow for methods
2125 if (!privileged) break; // only allow in privileged code
2126 return _method_Hidden;
2127 }
2128 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_security_AccessController_Hidden_signature): {
2129 if (_location != _in_method) break; // only allow for methods
2130 if (!privileged) break; // only allow in privileged code
2131 return _method_Hidden;
2132 }
2133 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2134 if (_location != _in_method) break; // only allow for methods
2135 if (!privileged) break; // only allow in privileged code
2136 return _method_HotSpotIntrinsicCandidate;
2137 }
2138 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2139 if (_location != _in_field) break; // only allow for fields
2140 if (!privileged) break; // only allow in privileged code
2141 return _field_Stable;
2142 }
2143 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2144 if (_location != _in_field && _location != _in_class) {
2145 break; // only allow for fields and classes
2146 }
2147 if (!EnableContended || (RestrictContended && !privileged)) {
2148 break; // honor privileges
2149 }
2150 return _jdk_internal_vm_annotation_Contended;
2151 }
2152 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2153 if (_location != _in_method) break; // only allow for methods
2154 if (RestrictReservedStack && !privileged) break; // honor privileges
2155 return _jdk_internal_vm_annotation_ReservedStackAccess;
2156 }
2157 default: {
2158 break;
2159 }
2160 }
2161 return AnnotationCollector::_unknown;
2162 }
2163
2164 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2165 if (is_contended())
2166 f->set_contended_group(contended_group());
2167 if (is_stable())
2168 f->set_stable(true);
2169 }
2170
2171 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2172 // If there's an error deallocate metadata for field annotations
2173 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2174 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2175 }
2176
2177 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2178 if (has_annotation(_method_CallerSensitive))
2179 m->set_caller_sensitive(true);
2180 if (has_annotation(_method_ForceInline))
2181 m->set_force_inline(true);
2182 if (has_annotation(_method_DontInline))
2183 m->set_dont_inline(true);
2184 if (has_annotation(_method_InjectedProfile))
2185 m->set_has_injected_profile(true);
2186 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2187 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2188 if (has_annotation(_method_Hidden))
2189 m->set_hidden(true);
2190 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2191 m->set_intrinsic_candidate(true);
2192 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2193 m->set_has_reserved_stack_access(true);
2194 }
2195
2196 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2197 assert(ik != NULL, "invariant");
2198 ik->set_is_contended(is_contended());
2199 }
2200
2201 #define MAX_ARGS_SIZE 255
2202 #define MAX_CODE_SIZE 65535
2203 #define INITIAL_MAX_LVT_NUMBER 256
2204
2205 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2206 *
2207 * Rules for LVT's and LVTT's are:
2208 * - There can be any number of LVT's and LVTT's.
2209 * - If there are n LVT's, it is the same as if there was just
2210 * one LVT containing all the entries from the n LVT's.
2211 * - There may be no more than one LVT entry per local variable.
2212 * Two LVT entries are 'equal' if these fields are the same:
2213 * start_pc, length, name, slot
2214 * - There may be no more than one LVTT entry per each LVT entry.
2215 * Each LVTT entry has to match some LVT entry.
2216 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2217 */
2218 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2219 int lvt_cnt,
2220 u2* const localvariable_table_length,
2221 const unsafe_u2** const localvariable_table_start,
2222 int lvtt_cnt,
2223 u2* const localvariable_type_table_length,
2224 const unsafe_u2** const localvariable_type_table_start,
2225 TRAPS) {
2226
2227 ResourceMark rm(THREAD);
2228
2229 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2230 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2231
2232 LVT_HashTable* const table = new LVT_HashTable();
2233
2234 // To fill LocalVariableTable in
2235 const Classfile_LVT_Element* cf_lvt;
2236 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2237
2238 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2239 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2240 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2241 copy_lvt_element(&cf_lvt[idx], lvt);
2242 // If no duplicates, add LVT elem in hashtable.
2243 if (table->put(*lvt, lvt) == false
2244 && _need_verify
2245 && _major_version >= JAVA_1_5_VERSION) {
2246 classfile_parse_error("Duplicated LocalVariableTable attribute "
2247 "entry for '%s' in class file %s",
2248 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2249 CHECK);
2250 }
2251 }
2252 }
2253
2254 // To merge LocalVariableTable and LocalVariableTypeTable
2255 const Classfile_LVT_Element* cf_lvtt;
2256 LocalVariableTableElement lvtt_elem;
2257
2258 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2259 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2260 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2261 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2262 LocalVariableTableElement** entry = table->get(lvtt_elem);
2263 if (entry == NULL) {
2264 if (_need_verify) {
2265 classfile_parse_error("LVTT entry for '%s' in class file %s "
2266 "does not match any LVT entry",
2267 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2268 CHECK);
2269 }
2270 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2271 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2272 "entry for '%s' in class file %s",
2273 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2274 CHECK);
2275 } else {
2276 // to add generic signatures into LocalVariableTable
2277 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2278 }
2279 }
2280 }
2281 }
2282
2283
2284 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2285 const u1* runtime_visible_annotations,
2286 int runtime_visible_annotations_length,
2287 const u1* runtime_invisible_annotations,
2288 int runtime_invisible_annotations_length,
2289 const u1* runtime_visible_parameter_annotations,
2290 int runtime_visible_parameter_annotations_length,
2291 const u1* runtime_invisible_parameter_annotations,
2292 int runtime_invisible_parameter_annotations_length,
2293 const u1* runtime_visible_type_annotations,
2294 int runtime_visible_type_annotations_length,
2295 const u1* runtime_invisible_type_annotations,
2296 int runtime_invisible_type_annotations_length,
2297 const u1* annotation_default,
2298 int annotation_default_length,
2299 TRAPS) {
2300
2301 AnnotationArray* a;
2302
2303 if (runtime_visible_annotations_length +
2304 runtime_invisible_annotations_length > 0) {
2305 a = assemble_annotations(runtime_visible_annotations,
2306 runtime_visible_annotations_length,
2307 runtime_invisible_annotations,
2308 runtime_invisible_annotations_length,
2309 CHECK);
2310 cm->set_method_annotations(a);
2311 }
2312
2313 if (runtime_visible_parameter_annotations_length +
2314 runtime_invisible_parameter_annotations_length > 0) {
2315 a = assemble_annotations(runtime_visible_parameter_annotations,
2316 runtime_visible_parameter_annotations_length,
2317 runtime_invisible_parameter_annotations,
2318 runtime_invisible_parameter_annotations_length,
2319 CHECK);
2320 cm->set_parameter_annotations(a);
2321 }
2322
2323 if (annotation_default_length > 0) {
2324 a = assemble_annotations(annotation_default,
2325 annotation_default_length,
2326 NULL,
2327 0,
2328 CHECK);
2329 cm->set_default_annotations(a);
2330 }
2331
2332 if (runtime_visible_type_annotations_length +
2333 runtime_invisible_type_annotations_length > 0) {
2334 a = assemble_annotations(runtime_visible_type_annotations,
2335 runtime_visible_type_annotations_length,
2336 runtime_invisible_type_annotations,
2337 runtime_invisible_type_annotations_length,
2338 CHECK);
2339 cm->set_type_annotations(a);
2340 }
2341 }
2342
2343
2344 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2345 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2346 // Method* to save footprint, so we only know the size of the resulting Method* when the
2347 // entire method attribute is parsed.
2348 //
2349 // The promoted_flags parameter is used to pass relevant access_flags
2350 // from the method back up to the containing klass. These flag values
2351 // are added to klass's access_flags.
2352
2353 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2354 bool is_interface,
2355 const ConstantPool* cp,
2356 AccessFlags* const promoted_flags,
2357 TRAPS) {
2358 assert(cfs != NULL, "invariant");
2359 assert(cp != NULL, "invariant");
2360 assert(promoted_flags != NULL, "invariant");
2361
2362 ResourceMark rm(THREAD);
2363 // Parse fixed parts:
2364 // access_flags, name_index, descriptor_index, attributes_count
2365 cfs->guarantee_more(8, CHECK_NULL);
2366
2367 int flags = cfs->get_u2_fast();
2368 const u2 name_index = cfs->get_u2_fast();
2369 const int cp_size = cp->length();
2370 check_property(
2371 valid_symbol_at(name_index),
2372 "Illegal constant pool index %u for method name in class file %s",
2373 name_index, CHECK_NULL);
2374 const Symbol* const name = cp->symbol_at(name_index);
2375 verify_legal_method_name(name, CHECK_NULL);
2376
2377 const u2 signature_index = cfs->get_u2_fast();
2378 guarantee_property(
2379 valid_symbol_at(signature_index),
2380 "Illegal constant pool index %u for method signature in class file %s",
2381 signature_index, CHECK_NULL);
2382 const Symbol* const signature = cp->symbol_at(signature_index);
2383
2384 if (name == vmSymbols::class_initializer_name()) {
2385 // We ignore the other access flags for a valid class initializer.
2386 // (JVM Spec 2nd ed., chapter 4.6)
2387 if (_major_version < 51) { // backward compatibility
2388 flags = JVM_ACC_STATIC;
2389 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2390 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2391 } else {
2392 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2393 }
2394 } else {
2395 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2396 }
2397
2398 if (name == vmSymbols::object_initializer_name() && is_interface) {
2399 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2400 }
2401
2402 int args_size = -1; // only used when _need_verify is true
2403 if (_need_verify) {
2404 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2405 verify_legal_method_signature(name, signature, CHECK_NULL);
2406 if (args_size > MAX_ARGS_SIZE) {
2407 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2408 }
2409 }
2410
2411 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2412
2413 // Default values for code and exceptions attribute elements
2414 u2 max_stack = 0;
2415 u2 max_locals = 0;
2416 u4 code_length = 0;
2417 const u1* code_start = 0;
2418 u2 exception_table_length = 0;
2419 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2420 Array<int>* exception_handlers = Universe::the_empty_int_array();
2421 u2 checked_exceptions_length = 0;
2422 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2423 CompressedLineNumberWriteStream* linenumber_table = NULL;
2424 int linenumber_table_length = 0;
2425 int total_lvt_length = 0;
2426 u2 lvt_cnt = 0;
2427 u2 lvtt_cnt = 0;
2428 bool lvt_allocated = false;
2429 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2430 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2431 u2* localvariable_table_length = NULL;
2432 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2433 u2* localvariable_type_table_length = NULL;
2434 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2435 int method_parameters_length = -1;
2436 const u1* method_parameters_data = NULL;
2437 bool method_parameters_seen = false;
2438 bool parsed_code_attribute = false;
2439 bool parsed_checked_exceptions_attribute = false;
2440 bool parsed_stackmap_attribute = false;
2441 // stackmap attribute - JDK1.5
2442 const u1* stackmap_data = NULL;
2443 int stackmap_data_length = 0;
2444 u2 generic_signature_index = 0;
2445 MethodAnnotationCollector parsed_annotations;
2446 const u1* runtime_visible_annotations = NULL;
2447 int runtime_visible_annotations_length = 0;
2448 const u1* runtime_invisible_annotations = NULL;
2449 int runtime_invisible_annotations_length = 0;
2450 const u1* runtime_visible_parameter_annotations = NULL;
2451 int runtime_visible_parameter_annotations_length = 0;
2452 const u1* runtime_invisible_parameter_annotations = NULL;
2453 int runtime_invisible_parameter_annotations_length = 0;
2454 const u1* runtime_visible_type_annotations = NULL;
2455 int runtime_visible_type_annotations_length = 0;
2456 const u1* runtime_invisible_type_annotations = NULL;
2457 int runtime_invisible_type_annotations_length = 0;
2458 bool runtime_invisible_annotations_exists = false;
2459 bool runtime_invisible_type_annotations_exists = false;
2460 bool runtime_invisible_parameter_annotations_exists = false;
2461 const u1* annotation_default = NULL;
2462 int annotation_default_length = 0;
2463
2464 // Parse code and exceptions attribute
2465 u2 method_attributes_count = cfs->get_u2_fast();
2466 while (method_attributes_count--) {
2467 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2468 const u2 method_attribute_name_index = cfs->get_u2_fast();
2469 const u4 method_attribute_length = cfs->get_u4_fast();
2470 check_property(
2471 valid_symbol_at(method_attribute_name_index),
2472 "Invalid method attribute name index %u in class file %s",
2473 method_attribute_name_index, CHECK_NULL);
2474
2475 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2476 if (method_attribute_name == vmSymbols::tag_code()) {
2477 // Parse Code attribute
2478 if (_need_verify) {
2479 guarantee_property(
2480 !access_flags.is_native() && !access_flags.is_abstract(),
2481 "Code attribute in native or abstract methods in class file %s",
2482 CHECK_NULL);
2483 }
2484 if (parsed_code_attribute) {
2485 classfile_parse_error("Multiple Code attributes in class file %s",
2486 CHECK_NULL);
2487 }
2488 parsed_code_attribute = true;
2489
2490 // Stack size, locals size, and code size
2491 if (_major_version == 45 && _minor_version <= 2) {
2492 cfs->guarantee_more(4, CHECK_NULL);
2493 max_stack = cfs->get_u1_fast();
2494 max_locals = cfs->get_u1_fast();
2495 code_length = cfs->get_u2_fast();
2496 } else {
2497 cfs->guarantee_more(8, CHECK_NULL);
2498 max_stack = cfs->get_u2_fast();
2499 max_locals = cfs->get_u2_fast();
2500 code_length = cfs->get_u4_fast();
2501 }
2502 if (_need_verify) {
2503 guarantee_property(args_size <= max_locals,
2504 "Arguments can't fit into locals in class file %s",
2505 CHECK_NULL);
2506 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2507 "Invalid method Code length %u in class file %s",
2508 code_length, CHECK_NULL);
2509 }
2510 // Code pointer
2511 code_start = cfs->current();
2512 assert(code_start != NULL, "null code start");
2513 cfs->guarantee_more(code_length, CHECK_NULL);
2514 cfs->skip_u1_fast(code_length);
2515
2516 // Exception handler table
2517 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2518 exception_table_length = cfs->get_u2_fast();
2519 if (exception_table_length > 0) {
2520 exception_table_start = parse_exception_table(cfs,
2521 code_length,
2522 exception_table_length,
2523 CHECK_NULL);
2524 }
2525
2526 // Parse additional attributes in code attribute
2527 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2528 u2 code_attributes_count = cfs->get_u2_fast();
2529
2530 unsigned int calculated_attribute_length = 0;
2531
2532 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2533 calculated_attribute_length =
2534 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2535 } else {
2536 // max_stack, locals and length are smaller in pre-version 45.2 classes
2537 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2538 }
2539 calculated_attribute_length +=
2540 code_length +
2541 sizeof(exception_table_length) +
2542 sizeof(code_attributes_count) +
2543 exception_table_length *
2544 ( sizeof(u2) + // start_pc
2545 sizeof(u2) + // end_pc
2546 sizeof(u2) + // handler_pc
2547 sizeof(u2) ); // catch_type_index
2548
2549 while (code_attributes_count--) {
2550 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2551 const u2 code_attribute_name_index = cfs->get_u2_fast();
2552 const u4 code_attribute_length = cfs->get_u4_fast();
2553 calculated_attribute_length += code_attribute_length +
2554 sizeof(code_attribute_name_index) +
2555 sizeof(code_attribute_length);
2556 check_property(valid_symbol_at(code_attribute_name_index),
2557 "Invalid code attribute name index %u in class file %s",
2558 code_attribute_name_index,
2559 CHECK_NULL);
2560 if (LoadLineNumberTables &&
2561 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2562 // Parse and compress line number table
2563 parse_linenumber_table(code_attribute_length,
2564 code_length,
2565 &linenumber_table,
2566 CHECK_NULL);
2567
2568 } else if (LoadLocalVariableTables &&
2569 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2570 // Parse local variable table
2571 if (!lvt_allocated) {
2572 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2573 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2574 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2575 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2576 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2577 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2578 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2579 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2580 lvt_allocated = true;
2581 }
2582 if (lvt_cnt == max_lvt_cnt) {
2583 max_lvt_cnt <<= 1;
2584 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2585 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2586 }
2587 localvariable_table_start[lvt_cnt] =
2588 parse_localvariable_table(cfs,
2589 code_length,
2590 max_locals,
2591 code_attribute_length,
2592 &localvariable_table_length[lvt_cnt],
2593 false, // is not LVTT
2594 CHECK_NULL);
2595 total_lvt_length += localvariable_table_length[lvt_cnt];
2596 lvt_cnt++;
2597 } else if (LoadLocalVariableTypeTables &&
2598 _major_version >= JAVA_1_5_VERSION &&
2599 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2600 if (!lvt_allocated) {
2601 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2602 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2603 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2604 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2605 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2606 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2607 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2608 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2609 lvt_allocated = true;
2610 }
2611 // Parse local variable type table
2612 if (lvtt_cnt == max_lvtt_cnt) {
2613 max_lvtt_cnt <<= 1;
2614 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2615 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2616 }
2617 localvariable_type_table_start[lvtt_cnt] =
2618 parse_localvariable_table(cfs,
2619 code_length,
2620 max_locals,
2621 code_attribute_length,
2622 &localvariable_type_table_length[lvtt_cnt],
2623 true, // is LVTT
2624 CHECK_NULL);
2625 lvtt_cnt++;
2626 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2627 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2628 // Stack map is only needed by the new verifier in JDK1.5.
2629 if (parsed_stackmap_attribute) {
2630 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2631 }
2632 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2633 stackmap_data_length = code_attribute_length;
2634 parsed_stackmap_attribute = true;
2635 } else {
2636 // Skip unknown attributes
2637 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2638 }
2639 }
2640 // check method attribute length
2641 if (_need_verify) {
2642 guarantee_property(method_attribute_length == calculated_attribute_length,
2643 "Code segment has wrong length in class file %s",
2644 CHECK_NULL);
2645 }
2646 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2647 // Parse Exceptions attribute
2648 if (parsed_checked_exceptions_attribute) {
2649 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2650 CHECK_NULL);
2651 }
2652 parsed_checked_exceptions_attribute = true;
2653 checked_exceptions_start =
2654 parse_checked_exceptions(cfs,
2655 &checked_exceptions_length,
2656 method_attribute_length,
2657 CHECK_NULL);
2658 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2659 // reject multiple method parameters
2660 if (method_parameters_seen) {
2661 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2662 CHECK_NULL);
2663 }
2664 method_parameters_seen = true;
2665 method_parameters_length = cfs->get_u1_fast();
2666 const u2 real_length = (method_parameters_length * 4u) + 1u;
2667 if (method_attribute_length != real_length) {
2668 classfile_parse_error(
2669 "Invalid MethodParameters method attribute length %u in class file",
2670 method_attribute_length, CHECK_NULL);
2671 }
2672 method_parameters_data = cfs->current();
2673 cfs->skip_u2_fast(method_parameters_length);
2674 cfs->skip_u2_fast(method_parameters_length);
2675 // ignore this attribute if it cannot be reflected
2676 if (!SystemDictionary::Parameter_klass_loaded())
2677 method_parameters_length = -1;
2678 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2679 if (method_attribute_length != 0) {
2680 classfile_parse_error(
2681 "Invalid Synthetic method attribute length %u in class file %s",
2682 method_attribute_length, CHECK_NULL);
2683 }
2684 // Should we check that there hasn't already been a synthetic attribute?
2685 access_flags.set_is_synthetic();
2686 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2687 if (method_attribute_length != 0) {
2688 classfile_parse_error(
2689 "Invalid Deprecated method attribute length %u in class file %s",
2690 method_attribute_length, CHECK_NULL);
2691 }
2692 } else if (_major_version >= JAVA_1_5_VERSION) {
2693 if (method_attribute_name == vmSymbols::tag_signature()) {
2694 if (generic_signature_index != 0) {
2695 classfile_parse_error(
2696 "Multiple Signature attributes for method in class file %s",
2697 CHECK_NULL);
2698 }
2699 if (method_attribute_length != 2) {
2700 classfile_parse_error(
2701 "Invalid Signature attribute length %u in class file %s",
2702 method_attribute_length, CHECK_NULL);
2703 }
2704 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2705 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2706 if (runtime_visible_annotations != NULL) {
2707 classfile_parse_error(
2708 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2709 CHECK_NULL);
2710 }
2711 runtime_visible_annotations_length = method_attribute_length;
2712 runtime_visible_annotations = cfs->current();
2713 assert(runtime_visible_annotations != NULL, "null visible annotations");
2714 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2715 parse_annotations(cp,
2716 runtime_visible_annotations,
2717 runtime_visible_annotations_length,
2718 &parsed_annotations,
2719 _loader_data,
2720 CHECK_NULL);
2721 cfs->skip_u1_fast(runtime_visible_annotations_length);
2722 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2723 if (runtime_invisible_annotations_exists) {
2724 classfile_parse_error(
2725 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2726 CHECK_NULL);
2727 }
2728 runtime_invisible_annotations_exists = true;
2729 if (PreserveAllAnnotations) {
2730 runtime_invisible_annotations_length = method_attribute_length;
2731 runtime_invisible_annotations = cfs->current();
2732 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2733 }
2734 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2735 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2736 if (runtime_visible_parameter_annotations != NULL) {
2737 classfile_parse_error(
2738 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2739 CHECK_NULL);
2740 }
2741 runtime_visible_parameter_annotations_length = method_attribute_length;
2742 runtime_visible_parameter_annotations = cfs->current();
2743 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2744 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2745 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2746 if (runtime_invisible_parameter_annotations_exists) {
2747 classfile_parse_error(
2748 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2749 CHECK_NULL);
2750 }
2751 runtime_invisible_parameter_annotations_exists = true;
2752 if (PreserveAllAnnotations) {
2753 runtime_invisible_parameter_annotations_length = method_attribute_length;
2754 runtime_invisible_parameter_annotations = cfs->current();
2755 assert(runtime_invisible_parameter_annotations != NULL,
2756 "null invisible parameter annotations");
2757 }
2758 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2759 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2760 if (annotation_default != NULL) {
2761 classfile_parse_error(
2762 "Multiple AnnotationDefault attributes for method in class file %s",
2763 CHECK_NULL);
2764 }
2765 annotation_default_length = method_attribute_length;
2766 annotation_default = cfs->current();
2767 assert(annotation_default != NULL, "null annotation default");
2768 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2769 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2770 if (runtime_visible_type_annotations != NULL) {
2771 classfile_parse_error(
2772 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2773 CHECK_NULL);
2774 }
2775 runtime_visible_type_annotations_length = method_attribute_length;
2776 runtime_visible_type_annotations = cfs->current();
2777 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2778 // No need for the VM to parse Type annotations
2779 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2780 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2781 if (runtime_invisible_type_annotations_exists) {
2782 classfile_parse_error(
2783 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2784 CHECK_NULL);
2785 } else {
2786 runtime_invisible_type_annotations_exists = true;
2787 }
2788 if (PreserveAllAnnotations) {
2789 runtime_invisible_type_annotations_length = method_attribute_length;
2790 runtime_invisible_type_annotations = cfs->current();
2791 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2792 }
2793 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2794 } else {
2795 // Skip unknown attributes
2796 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2797 }
2798 } else {
2799 // Skip unknown attributes
2800 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2801 }
2802 }
2803
2804 if (linenumber_table != NULL) {
2805 linenumber_table->write_terminator();
2806 linenumber_table_length = linenumber_table->position();
2807 }
2808
2809 // Make sure there's at least one Code attribute in non-native/non-abstract method
2810 if (_need_verify) {
2811 guarantee_property(access_flags.is_native() ||
2812 access_flags.is_abstract() ||
2813 parsed_code_attribute,
2814 "Absent Code attribute in method that is not native or abstract in class file %s",
2815 CHECK_NULL);
2816 }
2817
2818 // All sizing information for a Method* is finally available, now create it
2819 InlineTableSizes sizes(
2820 total_lvt_length,
2821 linenumber_table_length,
2822 exception_table_length,
2823 checked_exceptions_length,
2824 method_parameters_length,
2825 generic_signature_index,
2826 runtime_visible_annotations_length +
2827 runtime_invisible_annotations_length,
2828 runtime_visible_parameter_annotations_length +
2829 runtime_invisible_parameter_annotations_length,
2830 runtime_visible_type_annotations_length +
2831 runtime_invisible_type_annotations_length,
2832 annotation_default_length,
2833 0);
2834
2835 Method* const m = Method::allocate(_loader_data,
2836 code_length,
2837 access_flags,
2838 &sizes,
2839 ConstMethod::NORMAL,
2840 CHECK_NULL);
2841
2842 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2843
2844 // Fill in information from fixed part (access_flags already set)
2845 m->set_constants(_cp);
2846 m->set_name_index(name_index);
2847 m->set_signature_index(signature_index);
2848
2849 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2850 m->constMethod()->set_result_type(rtf.type());
2851
2852 if (args_size >= 0) {
2853 m->set_size_of_parameters(args_size);
2854 } else {
2855 m->compute_size_of_parameters(THREAD);
2856 }
2857 #ifdef ASSERT
2858 if (args_size >= 0) {
2859 m->compute_size_of_parameters(THREAD);
2860 assert(args_size == m->size_of_parameters(), "");
2861 }
2862 #endif
2863
2864 // Fill in code attribute information
2865 m->set_max_stack(max_stack);
2866 m->set_max_locals(max_locals);
2867 if (stackmap_data != NULL) {
2868 m->constMethod()->copy_stackmap_data(_loader_data,
2869 (u1*)stackmap_data,
2870 stackmap_data_length,
2871 CHECK_NULL);
2872 }
2873
2874 // Copy byte codes
2875 m->set_code((u1*)code_start);
2876
2877 // Copy line number table
2878 if (linenumber_table != NULL) {
2879 memcpy(m->compressed_linenumber_table(),
2880 linenumber_table->buffer(),
2881 linenumber_table_length);
2882 }
2883
2884 // Copy exception table
2885 if (exception_table_length > 0) {
2886 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2887 m->exception_table_start(),
2888 exception_table_length * sizeof(ExceptionTableElement),
2889 sizeof(u2));
2890 }
2891
2892 // Copy method parameters
2893 if (method_parameters_length > 0) {
2894 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2895 for (int i = 0; i < method_parameters_length; i++) {
2896 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2897 method_parameters_data += 2;
2898 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2899 method_parameters_data += 2;
2900 }
2901 }
2902
2903 // Copy checked exceptions
2904 if (checked_exceptions_length > 0) {
2905 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2906 m->checked_exceptions_start(),
2907 checked_exceptions_length * sizeof(CheckedExceptionElement),
2908 sizeof(u2));
2909 }
2910
2911 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2912 if (total_lvt_length > 0) {
2913 promoted_flags->set_has_localvariable_table();
2914 copy_localvariable_table(m->constMethod(),
2915 lvt_cnt,
2916 localvariable_table_length,
2917 localvariable_table_start,
2918 lvtt_cnt,
2919 localvariable_type_table_length,
2920 localvariable_type_table_start,
2921 CHECK_NULL);
2922 }
2923
2924 if (parsed_annotations.has_any_annotations())
2925 parsed_annotations.apply_to(m);
2926
2927 // Copy annotations
2928 copy_method_annotations(m->constMethod(),
2929 runtime_visible_annotations,
2930 runtime_visible_annotations_length,
2931 runtime_invisible_annotations,
2932 runtime_invisible_annotations_length,
2933 runtime_visible_parameter_annotations,
2934 runtime_visible_parameter_annotations_length,
2935 runtime_invisible_parameter_annotations,
2936 runtime_invisible_parameter_annotations_length,
2937 runtime_visible_type_annotations,
2938 runtime_visible_type_annotations_length,
2939 runtime_invisible_type_annotations,
2940 runtime_invisible_type_annotations_length,
2941 annotation_default,
2942 annotation_default_length,
2943 CHECK_NULL);
2944
2945 if (name == vmSymbols::finalize_method_name() &&
2946 signature == vmSymbols::void_method_signature()) {
2947 if (m->is_empty_method()) {
2948 _has_empty_finalizer = true;
2949 } else {
2950 _has_finalizer = true;
2951 }
2952 }
2953 if (name == vmSymbols::object_initializer_name() &&
2954 signature == vmSymbols::void_method_signature() &&
2955 m->is_vanilla_constructor()) {
2956 _has_vanilla_constructor = true;
2957 }
2958
2959 NOT_PRODUCT(m->verify());
2960 return m;
2961 }
2962
2963
2964 // The promoted_flags parameter is used to pass relevant access_flags
2965 // from the methods back up to the containing klass. These flag values
2966 // are added to klass's access_flags.
2967 // Side-effects: populates the _methods field in the parser
2968 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2969 bool is_interface,
2970 AccessFlags* promoted_flags,
2971 bool* has_final_method,
2972 bool* declares_nonstatic_concrete_methods,
2973 TRAPS) {
2974 assert(cfs != NULL, "invariant");
2975 assert(promoted_flags != NULL, "invariant");
2976 assert(has_final_method != NULL, "invariant");
2977 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2978
2979 assert(NULL == _methods, "invariant");
2980
2981 cfs->guarantee_more(2, CHECK); // length
2982 const u2 length = cfs->get_u2_fast();
2983 if (length == 0) {
2984 _methods = Universe::the_empty_method_array();
2985 } else {
2986 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2987 length,
2988 NULL,
2989 CHECK);
2990
2991 for (int index = 0; index < length; index++) {
2992 Method* method = parse_method(cfs,
2993 is_interface,
2994 _cp,
2995 promoted_flags,
2996 CHECK);
2997
2998 if (method->is_final()) {
2999 *has_final_method = true;
3000 }
3001 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
3002 // used for interface initialization, and default method inheritance analysis
3003 if (is_interface && !(*declares_nonstatic_concrete_methods)
3004 && !method->is_abstract() && !method->is_static()) {
3005 *declares_nonstatic_concrete_methods = true;
3006 }
3007 _methods->at_put(index, method);
3008 }
3009
3010 if (_need_verify && length > 1) {
3011 // Check duplicated methods
3012 ResourceMark rm(THREAD);
3013 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
3014 THREAD, NameSigHash*, HASH_ROW_SIZE);
3015 initialize_hashtable(names_and_sigs);
3016 bool dup = false;
3017 const Symbol* name = NULL;
3018 const Symbol* sig = NULL;
3019 {
3020 debug_only(NoSafepointVerifier nsv;)
3021 for (int i = 0; i < length; i++) {
3022 const Method* const m = _methods->at(i);
3023 name = m->name();
3024 sig = m->signature();
3025 // If no duplicates, add name/signature in hashtable names_and_sigs.
3026 if (!put_after_lookup(name, sig, names_and_sigs)) {
3027 dup = true;
3028 break;
3029 }
3030 }
3031 }
3032 if (dup) {
3033 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
3034 name->as_C_string(), sig->as_klass_external_name(), CHECK);
3035 }
3036 }
3037 }
3038 }
3039
3040 static const intArray* sort_methods(Array<Method*>* methods) {
3041 const int length = methods->length();
3042 // If JVMTI original method ordering or sharing is enabled we have to
3043 // remember the original class file ordering.
3044 // We temporarily use the vtable_index field in the Method* to store the
3045 // class file index, so we can read in after calling qsort.
3046 // Put the method ordering in the shared archive.
3047 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3048 for (int index = 0; index < length; index++) {
3049 Method* const m = methods->at(index);
3050 assert(!m->valid_vtable_index(), "vtable index should not be set");
3051 m->set_vtable_index(index);
3052 }
3053 }
3054 // Sort method array by ascending method name (for faster lookups & vtable construction)
3055 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3056 Method::sort_methods(methods);
3057
3058 intArray* method_ordering = NULL;
3059 // If JVMTI original method ordering or sharing is enabled construct int
3060 // array remembering the original ordering
3061 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3062 method_ordering = new intArray(length, length, -1);
3063 for (int index = 0; index < length; index++) {
3064 Method* const m = methods->at(index);
3065 const int old_index = m->vtable_index();
3066 assert(old_index >= 0 && old_index < length, "invalid method index");
3067 method_ordering->at_put(index, old_index);
3068 m->set_vtable_index(Method::invalid_vtable_index);
3069 }
3070 }
3071 return method_ordering;
3072 }
3073
3074 // Parse generic_signature attribute for methods and fields
3075 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3076 TRAPS) {
3077 assert(cfs != NULL, "invariant");
3078
3079 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3080 const u2 generic_signature_index = cfs->get_u2_fast();
3081 check_property(
3082 valid_symbol_at(generic_signature_index),
3083 "Invalid Signature attribute at constant pool index %u in class file %s",
3084 generic_signature_index, CHECK_0);
3085 return generic_signature_index;
3086 }
3087
3088 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3089 TRAPS) {
3090
3091 assert(cfs != NULL, "invariant");
3092
3093 cfs->guarantee_more(2, CHECK); // sourcefile_index
3094 const u2 sourcefile_index = cfs->get_u2_fast();
3095 check_property(
3096 valid_symbol_at(sourcefile_index),
3097 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3098 sourcefile_index, CHECK);
3099 set_class_sourcefile_index(sourcefile_index);
3100 }
3101
3102 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3103 int length,
3104 TRAPS) {
3105 assert(cfs != NULL, "invariant");
3106
3107 const u1* const sde_buffer = cfs->current();
3108 assert(sde_buffer != NULL, "null sde buffer");
3109
3110 // Don't bother storing it if there is no way to retrieve it
3111 if (JvmtiExport::can_get_source_debug_extension()) {
3112 assert((length+1) > length, "Overflow checking");
3113 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3114 for (int i = 0; i < length; i++) {
3115 sde[i] = sde_buffer[i];
3116 }
3117 sde[length] = '\0';
3118 set_class_sde_buffer((const char*)sde, length);
3119 }
3120 // Got utf8 string, set stream position forward
3121 cfs->skip_u1(length, CHECK);
3122 }
3123
3124
3125 // Inner classes can be static, private or protected (classic VM does this)
3126 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3127 JVM_ACC_PRIVATE | \
3128 JVM_ACC_PROTECTED | \
3129 JVM_ACC_STATIC \
3130 )
3131
3132 // Return number of classes in the inner classes attribute table
3133 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3134 const u1* const inner_classes_attribute_start,
3135 bool parsed_enclosingmethod_attribute,
3136 u2 enclosing_method_class_index,
3137 u2 enclosing_method_method_index,
3138 TRAPS) {
3139 const u1* const current_mark = cfs->current();
3140 u2 length = 0;
3141 if (inner_classes_attribute_start != NULL) {
3142 cfs->set_current(inner_classes_attribute_start);
3143 cfs->guarantee_more(2, CHECK_0); // length
3144 length = cfs->get_u2_fast();
3145 }
3146
3147 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3148 // method data:
3149 // [inner_class_info_index,
3150 // outer_class_info_index,
3151 // inner_name_index,
3152 // inner_class_access_flags,
3153 // ...
3154 // enclosing_method_class_index,
3155 // enclosing_method_method_index]
3156 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3157 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3158 _inner_classes = inner_classes;
3159
3160 int index = 0;
3161 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3162 for (int n = 0; n < length; n++) {
3163 // Inner class index
3164 const u2 inner_class_info_index = cfs->get_u2_fast();
3165 check_property(
3166 valid_klass_reference_at(inner_class_info_index),
3167 "inner_class_info_index %u has bad constant type in class file %s",
3168 inner_class_info_index, CHECK_0);
3169 // Outer class index
3170 const u2 outer_class_info_index = cfs->get_u2_fast();
3171 check_property(
3172 outer_class_info_index == 0 ||
3173 valid_klass_reference_at(outer_class_info_index),
3174 "outer_class_info_index %u has bad constant type in class file %s",
3175 outer_class_info_index, CHECK_0);
3176 // Inner class name
3177 const u2 inner_name_index = cfs->get_u2_fast();
3178 check_property(
3179 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3180 "inner_name_index %u has bad constant type in class file %s",
3181 inner_name_index, CHECK_0);
3182 if (_need_verify) {
3183 guarantee_property(inner_class_info_index != outer_class_info_index,
3184 "Class is both outer and inner class in class file %s", CHECK_0);
3185 }
3186 // Access flags
3187 jint flags;
3188 // JVM_ACC_MODULE is defined in JDK-9 and later.
3189 if (_major_version >= JAVA_9_VERSION) {
3190 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3191 } else {
3192 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3193 }
3194 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3195 // Set abstract bit for old class files for backward compatibility
3196 flags |= JVM_ACC_ABSTRACT;
3197 }
3198 verify_legal_class_modifiers(flags, CHECK_0);
3199 AccessFlags inner_access_flags(flags);
3200
3201 inner_classes->at_put(index++, inner_class_info_index);
3202 inner_classes->at_put(index++, outer_class_info_index);
3203 inner_classes->at_put(index++, inner_name_index);
3204 inner_classes->at_put(index++, inner_access_flags.as_short());
3205 }
3206
3207 // 4347400: make sure there's no duplicate entry in the classes array
3208 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3209 for(int i = 0; i < length * 4; i += 4) {
3210 for(int j = i + 4; j < length * 4; j += 4) {
3211 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3212 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3213 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3214 inner_classes->at(i+3) != inner_classes->at(j+3)),
3215 "Duplicate entry in InnerClasses in class file %s",
3216 CHECK_0);
3217 }
3218 }
3219 }
3220
3221 // Set EnclosingMethod class and method indexes.
3222 if (parsed_enclosingmethod_attribute) {
3223 inner_classes->at_put(index++, enclosing_method_class_index);
3224 inner_classes->at_put(index++, enclosing_method_method_index);
3225 }
3226 assert(index == size, "wrong size");
3227
3228 // Restore buffer's current position.
3229 cfs->set_current(current_mark);
3230
3231 return length;
3232 }
3233
3234 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3235 const u1* const nest_members_attribute_start,
3236 TRAPS) {
3237 const u1* const current_mark = cfs->current();
3238 u2 length = 0;
3239 if (nest_members_attribute_start != NULL) {
3240 cfs->set_current(nest_members_attribute_start);
3241 cfs->guarantee_more(2, CHECK_0); // length
3242 length = cfs->get_u2_fast();
3243 }
3244 const int size = length;
3245 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3246 _nest_members = nest_members;
3247
3248 int index = 0;
3249 cfs->guarantee_more(2 * length, CHECK_0);
3250 for (int n = 0; n < length; n++) {
3251 const u2 class_info_index = cfs->get_u2_fast();
3252 check_property(
3253 valid_klass_reference_at(class_info_index),
3254 "Nest member class_info_index %u has bad constant type in class file %s",
3255 class_info_index, CHECK_0);
3256 nest_members->at_put(index++, class_info_index);
3257 }
3258 assert(index == size, "wrong size");
3259
3260 // Restore buffer's current position.
3261 cfs->set_current(current_mark);
3262
3263 return length;
3264 }
3265
3266 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3267 set_class_synthetic_flag(true);
3268 }
3269
3270 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3271 assert(cfs != NULL, "invariant");
3272
3273 const u2 signature_index = cfs->get_u2(CHECK);
3274 check_property(
3275 valid_symbol_at(signature_index),
3276 "Invalid constant pool index %u in Signature attribute in class file %s",
3277 signature_index, CHECK);
3278 set_class_generic_signature_index(signature_index);
3279 }
3280
3281 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3282 ConstantPool* cp,
3283 u4 attribute_byte_length,
3284 TRAPS) {
3285 assert(cfs != NULL, "invariant");
3286 assert(cp != NULL, "invariant");
3287
3288 const u1* const current_start = cfs->current();
3289
3290 guarantee_property(attribute_byte_length >= sizeof(u2),
3291 "Invalid BootstrapMethods attribute length %u in class file %s",
3292 attribute_byte_length,
3293 CHECK);
3294
3295 cfs->guarantee_more(attribute_byte_length, CHECK);
3296
3297 const int attribute_array_length = cfs->get_u2_fast();
3298
3299 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3300 "Short length on BootstrapMethods in class file %s",
3301 CHECK);
3302
3303
3304 // The attribute contains a counted array of counted tuples of shorts,
3305 // represending bootstrap specifiers:
3306 // length*{bootstrap_method_index, argument_count*{argument_index}}
3307 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3308 // operand_count = number of shorts in attr, except for leading length
3309
3310 // The attribute is copied into a short[] array.
3311 // The array begins with a series of short[2] pairs, one for each tuple.
3312 const int index_size = (attribute_array_length * 2);
3313
3314 Array<u2>* const operands =
3315 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3316
3317 // Eagerly assign operands so they will be deallocated with the constant
3318 // pool if there is an error.
3319 cp->set_operands(operands);
3320
3321 int operand_fill_index = index_size;
3322 const int cp_size = cp->length();
3323
3324 for (int n = 0; n < attribute_array_length; n++) {
3325 // Store a 32-bit offset into the header of the operand array.
3326 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3327
3328 // Read a bootstrap specifier.
3329 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3330 const u2 bootstrap_method_index = cfs->get_u2_fast();
3331 const u2 argument_count = cfs->get_u2_fast();
3332 check_property(
3333 valid_cp_range(bootstrap_method_index, cp_size) &&
3334 cp->tag_at(bootstrap_method_index).is_method_handle(),
3335 "bootstrap_method_index %u has bad constant type in class file %s",
3336 bootstrap_method_index,
3337 CHECK);
3338
3339 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3340 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3341 CHECK);
3342
3343 operands->at_put(operand_fill_index++, bootstrap_method_index);
3344 operands->at_put(operand_fill_index++, argument_count);
3345
3346 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3347 for (int j = 0; j < argument_count; j++) {
3348 const u2 argument_index = cfs->get_u2_fast();
3349 check_property(
3350 valid_cp_range(argument_index, cp_size) &&
3351 cp->tag_at(argument_index).is_loadable_constant(),
3352 "argument_index %u has bad constant type in class file %s",
3353 argument_index,
3354 CHECK);
3355 operands->at_put(operand_fill_index++, argument_index);
3356 }
3357 }
3358 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3359 "Bad length on BootstrapMethods in class file %s",
3360 CHECK);
3361 }
3362
3363 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3364 ConstantPool* cp,
3365 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3366 TRAPS) {
3367 assert(cfs != NULL, "invariant");
3368 assert(cp != NULL, "invariant");
3369 assert(parsed_annotations != NULL, "invariant");
3370
3371 // Set inner classes attribute to default sentinel
3372 _inner_classes = Universe::the_empty_short_array();
3373 // Set nest members attribute to default sentinel
3374 _nest_members = Universe::the_empty_short_array();
3375 cfs->guarantee_more(2, CHECK); // attributes_count
3376 u2 attributes_count = cfs->get_u2_fast();
3377 bool parsed_sourcefile_attribute = false;
3378 bool parsed_innerclasses_attribute = false;
3379 bool parsed_nest_members_attribute = false;
3380 bool parsed_nest_host_attribute = false;
3381 bool parsed_enclosingmethod_attribute = false;
3382 bool parsed_bootstrap_methods_attribute = false;
3383 const u1* runtime_visible_annotations = NULL;
3384 int runtime_visible_annotations_length = 0;
3385 const u1* runtime_invisible_annotations = NULL;
3386 int runtime_invisible_annotations_length = 0;
3387 const u1* runtime_visible_type_annotations = NULL;
3388 int runtime_visible_type_annotations_length = 0;
3389 const u1* runtime_invisible_type_annotations = NULL;
3390 int runtime_invisible_type_annotations_length = 0;
3391 bool runtime_invisible_type_annotations_exists = false;
3392 bool runtime_invisible_annotations_exists = false;
3393 bool parsed_source_debug_ext_annotations_exist = false;
3394 const u1* inner_classes_attribute_start = NULL;
3395 u4 inner_classes_attribute_length = 0;
3396 u2 enclosing_method_class_index = 0;
3397 u2 enclosing_method_method_index = 0;
3398 const u1* nest_members_attribute_start = NULL;
3399 u4 nest_members_attribute_length = 0;
3400
3401 // Iterate over attributes
3402 while (attributes_count--) {
3403 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3404 const u2 attribute_name_index = cfs->get_u2_fast();
3405 const u4 attribute_length = cfs->get_u4_fast();
3406 check_property(
3407 valid_symbol_at(attribute_name_index),
3408 "Attribute name has bad constant pool index %u in class file %s",
3409 attribute_name_index, CHECK);
3410 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3411 if (tag == vmSymbols::tag_source_file()) {
3412 // Check for SourceFile tag
3413 if (_need_verify) {
3414 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3415 }
3416 if (parsed_sourcefile_attribute) {
3417 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3418 } else {
3419 parsed_sourcefile_attribute = true;
3420 }
3421 parse_classfile_sourcefile_attribute(cfs, CHECK);
3422 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3423 // Check for SourceDebugExtension tag
3424 if (parsed_source_debug_ext_annotations_exist) {
3425 classfile_parse_error(
3426 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3427 }
3428 parsed_source_debug_ext_annotations_exist = true;
3429 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3430 } else if (tag == vmSymbols::tag_inner_classes()) {
3431 // Check for InnerClasses tag
3432 if (parsed_innerclasses_attribute) {
3433 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3434 } else {
3435 parsed_innerclasses_attribute = true;
3436 }
3437 inner_classes_attribute_start = cfs->current();
3438 inner_classes_attribute_length = attribute_length;
3439 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3440 } else if (tag == vmSymbols::tag_synthetic()) {
3441 // Check for Synthetic tag
3442 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3443 if (attribute_length != 0) {
3444 classfile_parse_error(
3445 "Invalid Synthetic classfile attribute length %u in class file %s",
3446 attribute_length, CHECK);
3447 }
3448 parse_classfile_synthetic_attribute(CHECK);
3449 } else if (tag == vmSymbols::tag_deprecated()) {
3450 // Check for Deprecatd tag - 4276120
3451 if (attribute_length != 0) {
3452 classfile_parse_error(
3453 "Invalid Deprecated classfile attribute length %u in class file %s",
3454 attribute_length, CHECK);
3455 }
3456 } else if (_major_version >= JAVA_1_5_VERSION) {
3457 if (tag == vmSymbols::tag_signature()) {
3458 if (_generic_signature_index != 0) {
3459 classfile_parse_error(
3460 "Multiple Signature attributes in class file %s", CHECK);
3461 }
3462 if (attribute_length != 2) {
3463 classfile_parse_error(
3464 "Wrong Signature attribute length %u in class file %s",
3465 attribute_length, CHECK);
3466 }
3467 parse_classfile_signature_attribute(cfs, CHECK);
3468 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3469 if (runtime_visible_annotations != NULL) {
3470 classfile_parse_error(
3471 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3472 }
3473 runtime_visible_annotations_length = attribute_length;
3474 runtime_visible_annotations = cfs->current();
3475 assert(runtime_visible_annotations != NULL, "null visible annotations");
3476 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3477 parse_annotations(cp,
3478 runtime_visible_annotations,
3479 runtime_visible_annotations_length,
3480 parsed_annotations,
3481 _loader_data,
3482 CHECK);
3483 cfs->skip_u1_fast(runtime_visible_annotations_length);
3484 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3485 if (runtime_invisible_annotations_exists) {
3486 classfile_parse_error(
3487 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3488 }
3489 runtime_invisible_annotations_exists = true;
3490 if (PreserveAllAnnotations) {
3491 runtime_invisible_annotations_length = attribute_length;
3492 runtime_invisible_annotations = cfs->current();
3493 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3494 }
3495 cfs->skip_u1(attribute_length, CHECK);
3496 } else if (tag == vmSymbols::tag_enclosing_method()) {
3497 if (parsed_enclosingmethod_attribute) {
3498 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3499 } else {
3500 parsed_enclosingmethod_attribute = true;
3501 }
3502 guarantee_property(attribute_length == 4,
3503 "Wrong EnclosingMethod attribute length %u in class file %s",
3504 attribute_length, CHECK);
3505 cfs->guarantee_more(4, CHECK); // class_index, method_index
3506 enclosing_method_class_index = cfs->get_u2_fast();
3507 enclosing_method_method_index = cfs->get_u2_fast();
3508 if (enclosing_method_class_index == 0) {
3509 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3510 }
3511 // Validate the constant pool indices and types
3512 check_property(valid_klass_reference_at(enclosing_method_class_index),
3513 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3514 if (enclosing_method_method_index != 0 &&
3515 (!cp->is_within_bounds(enclosing_method_method_index) ||
3516 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3517 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3518 }
3519 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3520 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3521 if (parsed_bootstrap_methods_attribute) {
3522 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3523 }
3524 parsed_bootstrap_methods_attribute = true;
3525 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3526 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3527 if (runtime_visible_type_annotations != NULL) {
3528 classfile_parse_error(
3529 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3530 }
3531 runtime_visible_type_annotations_length = attribute_length;
3532 runtime_visible_type_annotations = cfs->current();
3533 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3534 // No need for the VM to parse Type annotations
3535 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3536 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3537 if (runtime_invisible_type_annotations_exists) {
3538 classfile_parse_error(
3539 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3540 } else {
3541 runtime_invisible_type_annotations_exists = true;
3542 }
3543 if (PreserveAllAnnotations) {
3544 runtime_invisible_type_annotations_length = attribute_length;
3545 runtime_invisible_type_annotations = cfs->current();
3546 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3547 }
3548 cfs->skip_u1(attribute_length, CHECK);
3549 } else if (_major_version >= JAVA_11_VERSION) {
3550 if (tag == vmSymbols::tag_nest_members()) {
3551 // Check for NestMembers tag
3552 if (parsed_nest_members_attribute) {
3553 classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3554 } else {
3555 parsed_nest_members_attribute = true;
3556 }
3557 if (parsed_nest_host_attribute) {
3558 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3559 }
3560 nest_members_attribute_start = cfs->current();
3561 nest_members_attribute_length = attribute_length;
3562 cfs->skip_u1(nest_members_attribute_length, CHECK);
3563 } else if (tag == vmSymbols::tag_nest_host()) {
3564 if (parsed_nest_host_attribute) {
3565 classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3566 } else {
3567 parsed_nest_host_attribute = true;
3568 }
3569 if (parsed_nest_members_attribute) {
3570 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3571 }
3572 if (_need_verify) {
3573 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3574 }
3575 cfs->guarantee_more(2, CHECK);
3576 u2 class_info_index = cfs->get_u2_fast();
3577 check_property(
3578 valid_klass_reference_at(class_info_index),
3579 "Nest-host class_info_index %u has bad constant type in class file %s",
3580 class_info_index, CHECK);
3581 _nest_host = class_info_index;
3582 } else {
3583 // Unknown attribute
3584 cfs->skip_u1(attribute_length, CHECK);
3585 }
3586 } else {
3587 // Unknown attribute
3588 cfs->skip_u1(attribute_length, CHECK);
3589 }
3590 } else {
3591 // Unknown attribute
3592 cfs->skip_u1(attribute_length, CHECK);
3593 }
3594 }
3595 _annotations = assemble_annotations(runtime_visible_annotations,
3596 runtime_visible_annotations_length,
3597 runtime_invisible_annotations,
3598 runtime_invisible_annotations_length,
3599 CHECK);
3600 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3601 runtime_visible_type_annotations_length,
3602 runtime_invisible_type_annotations,
3603 runtime_invisible_type_annotations_length,
3604 CHECK);
3605
3606 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3607 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3608 cfs,
3609 inner_classes_attribute_start,
3610 parsed_innerclasses_attribute,
3611 enclosing_method_class_index,
3612 enclosing_method_method_index,
3613 CHECK);
3614 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3615 guarantee_property(
3616 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3617 "Wrong InnerClasses attribute length in class file %s", CHECK);
3618 }
3619 }
3620
3621 if (parsed_nest_members_attribute) {
3622 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3623 cfs,
3624 nest_members_attribute_start,
3625 CHECK);
3626 if (_need_verify) {
3627 guarantee_property(
3628 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3629 "Wrong NestMembers attribute length in class file %s", CHECK);
3630 }
3631 }
3632
3633 if (_max_bootstrap_specifier_index >= 0) {
3634 guarantee_property(parsed_bootstrap_methods_attribute,
3635 "Missing BootstrapMethods attribute in class file %s", CHECK);
3636 }
3637 }
3638
3639 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3640 assert(k != NULL, "invariant");
3641
3642 if (_synthetic_flag)
3643 k->set_is_synthetic();
3644 if (_sourcefile_index != 0) {
3645 k->set_source_file_name_index(_sourcefile_index);
3646 }
3647 if (_generic_signature_index != 0) {
3648 k->set_generic_signature_index(_generic_signature_index);
3649 }
3650 if (_sde_buffer != NULL) {
3651 k->set_source_debug_extension(_sde_buffer, _sde_length);
3652 }
3653 }
3654
3655 // Create the Annotations object that will
3656 // hold the annotations array for the Klass.
3657 void ClassFileParser::create_combined_annotations(TRAPS) {
3658 if (_annotations == NULL &&
3659 _type_annotations == NULL &&
3660 _fields_annotations == NULL &&
3661 _fields_type_annotations == NULL) {
3662 // Don't create the Annotations object unnecessarily.
3663 return;
3664 }
3665
3666 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3667 annotations->set_class_annotations(_annotations);
3668 annotations->set_class_type_annotations(_type_annotations);
3669 annotations->set_fields_annotations(_fields_annotations);
3670 annotations->set_fields_type_annotations(_fields_type_annotations);
3671
3672 // This is the Annotations object that will be
3673 // assigned to InstanceKlass being constructed.
3674 _combined_annotations = annotations;
3675
3676 // The annotations arrays below has been transfered the
3677 // _combined_annotations so these fields can now be cleared.
3678 _annotations = NULL;
3679 _type_annotations = NULL;
3680 _fields_annotations = NULL;
3681 _fields_type_annotations = NULL;
3682 }
3683
3684 // Transfer ownership of metadata allocated to the InstanceKlass.
3685 void ClassFileParser::apply_parsed_class_metadata(
3686 InstanceKlass* this_klass,
3687 int java_fields_count, TRAPS) {
3688 assert(this_klass != NULL, "invariant");
3689
3690 _cp->set_pool_holder(this_klass);
3691 this_klass->set_constants(_cp);
3692 this_klass->set_fields(_fields, java_fields_count);
3693 this_klass->set_methods(_methods);
3694 this_klass->set_inner_classes(_inner_classes);
3695 this_klass->set_nest_members(_nest_members);
3696 this_klass->set_nest_host_index(_nest_host);
3697 this_klass->set_local_interfaces(_local_interfaces);
3698 this_klass->set_annotations(_combined_annotations);
3699 // Delay the setting of _transitive_interfaces until after initialize_supers() in
3700 // fill_instance_klass(). It is because the _transitive_interfaces may be shared with
3701 // its _super. If an OOM occurs while loading the current klass, its _super field
3702 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3703 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3704 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3705
3706 // Clear out these fields so they don't get deallocated by the destructor
3707 clear_class_metadata();
3708 }
3709
3710 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3711 int runtime_visible_annotations_length,
3712 const u1* const runtime_invisible_annotations,
3713 int runtime_invisible_annotations_length,
3714 TRAPS) {
3715 AnnotationArray* annotations = NULL;
3716 if (runtime_visible_annotations != NULL ||
3717 runtime_invisible_annotations != NULL) {
3718 annotations = MetadataFactory::new_array<u1>(_loader_data,
3719 runtime_visible_annotations_length +
3720 runtime_invisible_annotations_length,
3721 CHECK_(annotations));
3722 if (runtime_visible_annotations != NULL) {
3723 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3724 annotations->at_put(i, runtime_visible_annotations[i]);
3725 }
3726 }
3727 if (runtime_invisible_annotations != NULL) {
3728 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3729 int append = runtime_visible_annotations_length+i;
3730 annotations->at_put(append, runtime_invisible_annotations[i]);
3731 }
3732 }
3733 }
3734 return annotations;
3735 }
3736
3737 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3738 const int super_class_index,
3739 const bool need_verify,
3740 TRAPS) {
3741 assert(cp != NULL, "invariant");
3742 const InstanceKlass* super_klass = NULL;
3743
3744 if (super_class_index == 0) {
3745 check_property(_class_name == vmSymbols::java_lang_Object(),
3746 "Invalid superclass index %u in class file %s",
3747 super_class_index,
3748 CHECK_NULL);
3749 } else {
3750 check_property(valid_klass_reference_at(super_class_index),
3751 "Invalid superclass index %u in class file %s",
3752 super_class_index,
3753 CHECK_NULL);
3754 // The class name should be legal because it is checked when parsing constant pool.
3755 // However, make sure it is not an array type.
3756 bool is_array = false;
3757 if (cp->tag_at(super_class_index).is_klass()) {
3758 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3759 if (need_verify)
3760 is_array = super_klass->is_array_klass();
3761 } else if (need_verify) {
3762 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3763 }
3764 if (need_verify) {
3765 guarantee_property(!is_array,
3766 "Bad superclass name in class file %s", CHECK_NULL);
3767 }
3768 }
3769 return super_klass;
3770 }
3771
3772 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3773 unsigned int nonstatic_oop_map_count,
3774 int first_nonstatic_oop_offset) {
3775
3776 unsigned int map_count =
3777 NULL == super ? 0 : super->nonstatic_oop_map_count();
3778 if (nonstatic_oop_map_count > 0) {
3779 // We have oops to add to map
3780 if (map_count == 0) {
3781 map_count = nonstatic_oop_map_count;
3782 }
3783 else {
3784 // Check whether we should add a new map block or whether the last one can
3785 // be extended
3786 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3787 const OopMapBlock* const last_map = first_map + map_count - 1;
3788
3789 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3790 if (next_offset == first_nonstatic_oop_offset) {
3791 // There is no gap bettwen superklass's last oop field and first
3792 // local oop field, merge maps.
3793 nonstatic_oop_map_count -= 1;
3794 }
3795 else {
3796 // Superklass didn't end with a oop field, add extra maps
3797 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3798 }
3799 map_count += nonstatic_oop_map_count;
3800 }
3801 }
3802 return map_count;
3803 }
3804
3805 #ifndef PRODUCT
3806 static void print_field_layout(const Symbol* name,
3807 Array<u2>* fields,
3808 const constantPoolHandle& cp,
3809 int instance_size,
3810 int instance_fields_start,
3811 int instance_fields_end,
3812 int static_fields_end) {
3813
3814 assert(name != NULL, "invariant");
3815
3816 tty->print("%s: field layout\n", name->as_klass_external_name());
3817 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3818 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3819 if (!fs.access_flags().is_static()) {
3820 tty->print(" @%3d \"%s\" %s\n",
3821 fs.offset(),
3822 fs.name()->as_klass_external_name(),
3823 fs.signature()->as_klass_external_name());
3824 }
3825 }
3826 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3827 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3828 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3829 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3830 if (fs.access_flags().is_static()) {
3831 tty->print(" @%3d \"%s\" %s\n",
3832 fs.offset(),
3833 fs.name()->as_klass_external_name(),
3834 fs.signature()->as_klass_external_name());
3835 }
3836 }
3837 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3838 tty->print("\n");
3839 }
3840 #endif
3841
3842 // Values needed for oopmap and InstanceKlass creation
3843 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3844 public:
3845 int* nonstatic_oop_offsets;
3846 unsigned int* nonstatic_oop_counts;
3847 unsigned int nonstatic_oop_map_count;
3848 unsigned int total_oop_map_count;
3849 int instance_size;
3850 int nonstatic_field_size;
3851 int static_field_size;
3852 bool has_nonstatic_fields;
3853 };
3854
3855 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3856 void ClassFileParser::layout_fields(ConstantPool* cp,
3857 const FieldAllocationCount* fac,
3858 const ClassAnnotationCollector* parsed_annotations,
3859 FieldLayoutInfo* info,
3860 TRAPS) {
3861
3862 assert(cp != NULL, "invariant");
3863
3864 // Field size and offset computation
3865 int nonstatic_field_size = _super_klass == NULL ? 0 :
3866 _super_klass->nonstatic_field_size();
3867
3868 // Count the contended fields by type.
3869 //
3870 // We ignore static fields, because @Contended is not supported for them.
3871 // The layout code below will also ignore the static fields.
3872 int nonstatic_contended_count = 0;
3873 FieldAllocationCount fac_contended;
3874 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3875 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3876 if (fs.is_contended()) {
3877 fac_contended.count[atype]++;
3878 if (!fs.access_flags().is_static()) {
3879 nonstatic_contended_count++;
3880 }
3881 }
3882 }
3883
3884
3885 // Calculate the starting byte offsets
3886 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3887 int next_static_double_offset = next_static_oop_offset +
3888 ((fac->count[STATIC_OOP]) * heapOopSize);
3889 if (fac->count[STATIC_DOUBLE]) {
3890 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3891 }
3892
3893 int next_static_word_offset = next_static_double_offset +
3894 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3895 int next_static_short_offset = next_static_word_offset +
3896 ((fac->count[STATIC_WORD]) * BytesPerInt);
3897 int next_static_byte_offset = next_static_short_offset +
3898 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3899
3900 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3901 nonstatic_field_size * heapOopSize;
3902
3903 int next_nonstatic_field_offset = nonstatic_fields_start;
3904
3905 const bool is_contended_class = parsed_annotations->is_contended();
3906
3907 // Class is contended, pad before all the fields
3908 if (is_contended_class) {
3909 next_nonstatic_field_offset += ContendedPaddingWidth;
3910 }
3911
3912 // Compute the non-contended fields count.
3913 // The packing code below relies on these counts to determine if some field
3914 // can be squeezed into the alignment gap. Contended fields are obviously
3915 // exempt from that.
3916 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3917 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3918 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3919 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3920 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3921
3922 // Total non-static fields count, including every contended field
3923 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3924 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3925 fac->count[NONSTATIC_OOP];
3926
3927 const bool super_has_nonstatic_fields =
3928 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3929 const bool has_nonstatic_fields =
3930 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3931
3932
3933 // Prepare list of oops for oop map generation.
3934 //
3935 // "offset" and "count" lists are describing the set of contiguous oop
3936 // regions. offset[i] is the start of the i-th region, which then has
3937 // count[i] oops following. Before we know how many regions are required,
3938 // we pessimistically allocate the maps to fit all the oops into the
3939 // distinct regions.
3940 //
3941 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3942 // to figure out if we still need to do this.
3943 unsigned int nonstatic_oop_map_count = 0;
3944 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3945
3946 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3947 THREAD, int, max_nonstatic_oop_maps);
3948 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3949 THREAD, unsigned int, max_nonstatic_oop_maps);
3950
3951 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3952
3953 bool compact_fields = CompactFields;
3954 int allocation_style = FieldsAllocationStyle;
3955 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3956 assert(false, "0 <= FieldsAllocationStyle <= 2");
3957 allocation_style = 1; // Optimistic
3958 }
3959
3960 // The next classes have predefined hard-coded fields offsets
3961 // (see in JavaClasses::compute_hard_coded_offsets()).
3962 // Use default fields allocation order for them.
3963 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3964 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3965 _class_name == vmSymbols::java_lang_Class() ||
3966 _class_name == vmSymbols::java_lang_ClassLoader() ||
3967 _class_name == vmSymbols::java_lang_ref_Reference() ||
3968 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3969 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3970 _class_name == vmSymbols::java_lang_String() ||
3971 _class_name == vmSymbols::java_lang_Throwable() ||
3972 _class_name == vmSymbols::java_lang_Boolean() ||
3973 _class_name == vmSymbols::java_lang_Character() ||
3974 _class_name == vmSymbols::java_lang_Float() ||
3975 _class_name == vmSymbols::java_lang_Double() ||
3976 _class_name == vmSymbols::java_lang_Byte() ||
3977 _class_name == vmSymbols::java_lang_Short() ||
3978 _class_name == vmSymbols::java_lang_Integer() ||
3979 _class_name == vmSymbols::java_lang_Long())) {
3980 allocation_style = 0; // Allocate oops first
3981 compact_fields = false; // Don't compact fields
3982 }
3983
3984 int next_nonstatic_oop_offset = 0;
3985 int next_nonstatic_double_offset = 0;
3986
3987 // Rearrange fields for a given allocation style
3988 if( allocation_style == 0 ) {
3989 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3990 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3991 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3992 (nonstatic_oop_count * heapOopSize);
3993 } else if( allocation_style == 1 ) {
3994 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3995 next_nonstatic_double_offset = next_nonstatic_field_offset;
3996 } else if( allocation_style == 2 ) {
3997 // Fields allocation: oops fields in super and sub classes are together.
3998 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3999 _super_klass->nonstatic_oop_map_size() > 0 ) {
4000 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
4001 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
4002 const OopMapBlock* const last_map = first_map + map_count - 1;
4003 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
4004 if (next_offset == next_nonstatic_field_offset) {
4005 allocation_style = 0; // allocate oops first
4006 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4007 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4008 (nonstatic_oop_count * heapOopSize);
4009 }
4010 }
4011 if( allocation_style == 2 ) {
4012 allocation_style = 1; // allocate oops last
4013 next_nonstatic_double_offset = next_nonstatic_field_offset;
4014 }
4015 } else {
4016 ShouldNotReachHere();
4017 }
4018
4019 int nonstatic_oop_space_count = 0;
4020 int nonstatic_word_space_count = 0;
4021 int nonstatic_short_space_count = 0;
4022 int nonstatic_byte_space_count = 0;
4023 int nonstatic_oop_space_offset = 0;
4024 int nonstatic_word_space_offset = 0;
4025 int nonstatic_short_space_offset = 0;
4026 int nonstatic_byte_space_offset = 0;
4027
4028 // Try to squeeze some of the fields into the gaps due to
4029 // long/double alignment.
4030 if (nonstatic_double_count > 0) {
4031 int offset = next_nonstatic_double_offset;
4032 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
4033 if (compact_fields && offset != next_nonstatic_double_offset) {
4034 // Allocate available fields into the gap before double field.
4035 int length = next_nonstatic_double_offset - offset;
4036 assert(length == BytesPerInt, "");
4037 nonstatic_word_space_offset = offset;
4038 if (nonstatic_word_count > 0) {
4039 nonstatic_word_count -= 1;
4040 nonstatic_word_space_count = 1; // Only one will fit
4041 length -= BytesPerInt;
4042 offset += BytesPerInt;
4043 }
4044 nonstatic_short_space_offset = offset;
4045 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4046 nonstatic_short_count -= 1;
4047 nonstatic_short_space_count += 1;
4048 length -= BytesPerShort;
4049 offset += BytesPerShort;
4050 }
4051 nonstatic_byte_space_offset = offset;
4052 while (length > 0 && nonstatic_byte_count > 0) {
4053 nonstatic_byte_count -= 1;
4054 nonstatic_byte_space_count += 1;
4055 length -= 1;
4056 }
4057 // Allocate oop field in the gap if there are no other fields for that.
4058 nonstatic_oop_space_offset = offset;
4059 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4060 allocation_style != 0) { // when oop fields not first
4061 nonstatic_oop_count -= 1;
4062 nonstatic_oop_space_count = 1; // Only one will fit
4063 length -= heapOopSize;
4064 offset += heapOopSize;
4065 }
4066 }
4067 }
4068
4069 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4070 (nonstatic_double_count * BytesPerLong);
4071 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4072 (nonstatic_word_count * BytesPerInt);
4073 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4074 (nonstatic_short_count * BytesPerShort);
4075 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4076 nonstatic_byte_count;
4077
4078 // let oops jump before padding with this allocation style
4079 if( allocation_style == 1 ) {
4080 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4081 if( nonstatic_oop_count > 0 ) {
4082 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4083 }
4084 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4085 }
4086
4087 // Iterate over fields again and compute correct offsets.
4088 // The field allocation type was temporarily stored in the offset slot.
4089 // oop fields are located before non-oop fields (static and non-static).
4090 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4091
4092 // skip already laid out fields
4093 if (fs.is_offset_set()) continue;
4094
4095 // contended instance fields are handled below
4096 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4097
4098 int real_offset = 0;
4099 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4100
4101 // pack the rest of the fields
4102 switch (atype) {
4103 case STATIC_OOP:
4104 real_offset = next_static_oop_offset;
4105 next_static_oop_offset += heapOopSize;
4106 break;
4107 case STATIC_BYTE:
4108 real_offset = next_static_byte_offset;
4109 next_static_byte_offset += 1;
4110 break;
4111 case STATIC_SHORT:
4112 real_offset = next_static_short_offset;
4113 next_static_short_offset += BytesPerShort;
4114 break;
4115 case STATIC_WORD:
4116 real_offset = next_static_word_offset;
4117 next_static_word_offset += BytesPerInt;
4118 break;
4119 case STATIC_DOUBLE:
4120 real_offset = next_static_double_offset;
4121 next_static_double_offset += BytesPerLong;
4122 break;
4123 case NONSTATIC_OOP:
4124 if( nonstatic_oop_space_count > 0 ) {
4125 real_offset = nonstatic_oop_space_offset;
4126 nonstatic_oop_space_offset += heapOopSize;
4127 nonstatic_oop_space_count -= 1;
4128 } else {
4129 real_offset = next_nonstatic_oop_offset;
4130 next_nonstatic_oop_offset += heapOopSize;
4131 }
4132
4133 // Record this oop in the oop maps
4134 if( nonstatic_oop_map_count > 0 &&
4135 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4136 real_offset -
4137 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4138 heapOopSize ) {
4139 // This oop is adjacent to the previous one, add to current oop map
4140 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4141 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4142 } else {
4143 // This oop is not adjacent to the previous one, create new oop map
4144 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4145 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4146 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4147 nonstatic_oop_map_count += 1;
4148 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4149 first_nonstatic_oop_offset = real_offset;
4150 }
4151 }
4152 break;
4153 case NONSTATIC_BYTE:
4154 if( nonstatic_byte_space_count > 0 ) {
4155 real_offset = nonstatic_byte_space_offset;
4156 nonstatic_byte_space_offset += 1;
4157 nonstatic_byte_space_count -= 1;
4158 } else {
4159 real_offset = next_nonstatic_byte_offset;
4160 next_nonstatic_byte_offset += 1;
4161 }
4162 break;
4163 case NONSTATIC_SHORT:
4164 if( nonstatic_short_space_count > 0 ) {
4165 real_offset = nonstatic_short_space_offset;
4166 nonstatic_short_space_offset += BytesPerShort;
4167 nonstatic_short_space_count -= 1;
4168 } else {
4169 real_offset = next_nonstatic_short_offset;
4170 next_nonstatic_short_offset += BytesPerShort;
4171 }
4172 break;
4173 case NONSTATIC_WORD:
4174 if( nonstatic_word_space_count > 0 ) {
4175 real_offset = nonstatic_word_space_offset;
4176 nonstatic_word_space_offset += BytesPerInt;
4177 nonstatic_word_space_count -= 1;
4178 } else {
4179 real_offset = next_nonstatic_word_offset;
4180 next_nonstatic_word_offset += BytesPerInt;
4181 }
4182 break;
4183 case NONSTATIC_DOUBLE:
4184 real_offset = next_nonstatic_double_offset;
4185 next_nonstatic_double_offset += BytesPerLong;
4186 break;
4187 default:
4188 ShouldNotReachHere();
4189 }
4190 fs.set_offset(real_offset);
4191 }
4192
4193
4194 // Handle the contended cases.
4195 //
4196 // Each contended field should not intersect the cache line with another contended field.
4197 // In the absence of alignment information, we end up with pessimistically separating
4198 // the fields with full-width padding.
4199 //
4200 // Additionally, this should not break alignment for the fields, so we round the alignment up
4201 // for each field.
4202 if (nonstatic_contended_count > 0) {
4203
4204 // if there is at least one contended field, we need to have pre-padding for them
4205 next_nonstatic_padded_offset += ContendedPaddingWidth;
4206
4207 // collect all contended groups
4208 ResourceBitMap bm(cp->size());
4209 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4210 // skip already laid out fields
4211 if (fs.is_offset_set()) continue;
4212
4213 if (fs.is_contended()) {
4214 bm.set_bit(fs.contended_group());
4215 }
4216 }
4217
4218 int current_group = -1;
4219 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4220
4221 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4222
4223 // skip already laid out fields
4224 if (fs.is_offset_set()) continue;
4225
4226 // skip non-contended fields and fields from different group
4227 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4228
4229 // handle statics below
4230 if (fs.access_flags().is_static()) continue;
4231
4232 int real_offset = 0;
4233 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4234
4235 switch (atype) {
4236 case NONSTATIC_BYTE:
4237 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4238 real_offset = next_nonstatic_padded_offset;
4239 next_nonstatic_padded_offset += 1;
4240 break;
4241
4242 case NONSTATIC_SHORT:
4243 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4244 real_offset = next_nonstatic_padded_offset;
4245 next_nonstatic_padded_offset += BytesPerShort;
4246 break;
4247
4248 case NONSTATIC_WORD:
4249 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4250 real_offset = next_nonstatic_padded_offset;
4251 next_nonstatic_padded_offset += BytesPerInt;
4252 break;
4253
4254 case NONSTATIC_DOUBLE:
4255 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4256 real_offset = next_nonstatic_padded_offset;
4257 next_nonstatic_padded_offset += BytesPerLong;
4258 break;
4259
4260 case NONSTATIC_OOP:
4261 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4262 real_offset = next_nonstatic_padded_offset;
4263 next_nonstatic_padded_offset += heapOopSize;
4264
4265 // Record this oop in the oop maps
4266 if( nonstatic_oop_map_count > 0 &&
4267 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4268 real_offset -
4269 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4270 heapOopSize ) {
4271 // This oop is adjacent to the previous one, add to current oop map
4272 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4273 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4274 } else {
4275 // This oop is not adjacent to the previous one, create new oop map
4276 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4277 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4278 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4279 nonstatic_oop_map_count += 1;
4280 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4281 first_nonstatic_oop_offset = real_offset;
4282 }
4283 }
4284 break;
4285
4286 default:
4287 ShouldNotReachHere();
4288 }
4289
4290 if (fs.contended_group() == 0) {
4291 // Contended group defines the equivalence class over the fields:
4292 // the fields within the same contended group are not inter-padded.
4293 // The only exception is default group, which does not incur the
4294 // equivalence, and so requires intra-padding.
4295 next_nonstatic_padded_offset += ContendedPaddingWidth;
4296 }
4297
4298 fs.set_offset(real_offset);
4299 } // for
4300
4301 // Start laying out the next group.
4302 // Note that this will effectively pad the last group in the back;
4303 // this is expected to alleviate memory contention effects for
4304 // subclass fields and/or adjacent object.
4305 // If this was the default group, the padding is already in place.
4306 if (current_group != 0) {
4307 next_nonstatic_padded_offset += ContendedPaddingWidth;
4308 }
4309 }
4310
4311 // handle static fields
4312 }
4313
4314 // Entire class is contended, pad in the back.
4315 // This helps to alleviate memory contention effects for subclass fields
4316 // and/or adjacent object.
4317 if (is_contended_class) {
4318 next_nonstatic_padded_offset += ContendedPaddingWidth;
4319 }
4320
4321 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4322
4323 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, heapOopSize);
4324 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4325 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4326
4327 int static_field_size = (static_fields_end -
4328 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4329 nonstatic_field_size = nonstatic_field_size +
4330 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4331
4332 int instance_size = align_object_size(instance_end / wordSize);
4333
4334 assert(instance_size == align_object_size(align_up(
4335 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4336 wordSize) / wordSize), "consistent layout helper value");
4337
4338 // Invariant: nonstatic_field end/start should only change if there are
4339 // nonstatic fields in the class, or if the class is contended. We compare
4340 // against the non-aligned value, so that end alignment will not fail the
4341 // assert without actually having the fields.
4342 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4343 is_contended_class ||
4344 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4345
4346 // Number of non-static oop map blocks allocated at end of klass.
4347 const unsigned int total_oop_map_count =
4348 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4349 first_nonstatic_oop_offset);
4350
4351 #ifndef PRODUCT
4352 if (PrintFieldLayout) {
4353 print_field_layout(_class_name,
4354 _fields,
4355 cp,
4356 instance_size,
4357 nonstatic_fields_start,
4358 nonstatic_fields_end,
4359 static_fields_end);
4360 }
4361
4362 #endif
4363 // Pass back information needed for InstanceKlass creation
4364 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4365 info->nonstatic_oop_counts = nonstatic_oop_counts;
4366 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4367 info->total_oop_map_count = total_oop_map_count;
4368 info->instance_size = instance_size;
4369 info->static_field_size = static_field_size;
4370 info->nonstatic_field_size = nonstatic_field_size;
4371 info->has_nonstatic_fields = has_nonstatic_fields;
4372 }
4373
4374 static void fill_oop_maps(const InstanceKlass* k,
4375 unsigned int nonstatic_oop_map_count,
4376 const int* nonstatic_oop_offsets,
4377 const unsigned int* nonstatic_oop_counts) {
4378
4379 assert(k != NULL, "invariant");
4380
4381 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4382 const InstanceKlass* const super = k->superklass();
4383 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4384 if (super_count > 0) {
4385 // Copy maps from superklass
4386 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4387 for (unsigned int i = 0; i < super_count; ++i) {
4388 *this_oop_map++ = *super_oop_map++;
4389 }
4390 }
4391
4392 if (nonstatic_oop_map_count > 0) {
4393 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4394 // The counts differ because there is no gap between superklass's last oop
4395 // field and the first local oop field. Extend the last oop map copied
4396 // from the superklass instead of creating new one.
4397 nonstatic_oop_map_count--;
4398 nonstatic_oop_offsets++;
4399 this_oop_map--;
4400 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4401 this_oop_map++;
4402 }
4403
4404 // Add new map blocks, fill them
4405 while (nonstatic_oop_map_count-- > 0) {
4406 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4407 this_oop_map->set_count(*nonstatic_oop_counts++);
4408 this_oop_map++;
4409 }
4410 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4411 this_oop_map, "sanity");
4412 }
4413 }
4414
4415
4416 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4417 assert(ik != NULL, "invariant");
4418
4419 const Klass* const super = ik->super();
4420
4421 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4422 // in which case we don't have to register objects as finalizable
4423 if (!_has_empty_finalizer) {
4424 if (_has_finalizer ||
4425 (super != NULL && super->has_finalizer())) {
4426 ik->set_has_finalizer();
4427 }
4428 }
4429
4430 #ifdef ASSERT
4431 bool f = false;
4432 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4433 vmSymbols::void_method_signature());
4434 if (m != NULL && !m->is_empty_method()) {
4435 f = true;
4436 }
4437
4438 // Spec doesn't prevent agent from redefinition of empty finalizer.
4439 // Despite the fact that it's generally bad idea and redefined finalizer
4440 // will not work as expected we shouldn't abort vm in this case
4441 if (!ik->has_redefined_this_or_super()) {
4442 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4443 }
4444 #endif
4445
4446 // Check if this klass supports the java.lang.Cloneable interface
4447 if (SystemDictionary::Cloneable_klass_loaded()) {
4448 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4449 ik->set_is_cloneable();
4450 }
4451 }
4452
4453 // Check if this klass has a vanilla default constructor
4454 if (super == NULL) {
4455 // java.lang.Object has empty default constructor
4456 ik->set_has_vanilla_constructor();
4457 } else {
4458 if (super->has_vanilla_constructor() &&
4459 _has_vanilla_constructor) {
4460 ik->set_has_vanilla_constructor();
4461 }
4462 #ifdef ASSERT
4463 bool v = false;
4464 if (super->has_vanilla_constructor()) {
4465 const Method* const constructor =
4466 ik->find_method(vmSymbols::object_initializer_name(),
4467 vmSymbols::void_method_signature());
4468 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4469 v = true;
4470 }
4471 }
4472 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4473 #endif
4474 }
4475
4476 // If it cannot be fast-path allocated, set a bit in the layout helper.
4477 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4478 assert(ik->size_helper() > 0, "layout_helper is initialized");
4479 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4480 || ik->is_abstract() || ik->is_interface()
4481 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4482 || ik->size_helper() >= FastAllocateSizeLimit) {
4483 // Forbid fast-path allocation.
4484 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4485 ik->set_layout_helper(lh);
4486 }
4487 }
4488
4489 // Attach super classes and interface classes to class loader data
4490 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4491 TRAPS) {
4492 assert(defined_klass != NULL, "invariant");
4493
4494 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4495 if (defining_loader_data->is_the_null_class_loader_data()) {
4496 // Dependencies to null class loader data are implicit.
4497 return;
4498 } else {
4499 // add super class dependency
4500 Klass* const super = defined_klass->super();
4501 if (super != NULL) {
4502 defining_loader_data->record_dependency(super);
4503 }
4504
4505 // add super interface dependencies
4506 const Array<InstanceKlass*>* const local_interfaces = defined_klass->local_interfaces();
4507 if (local_interfaces != NULL) {
4508 const int length = local_interfaces->length();
4509 for (int i = 0; i < length; i++) {
4510 defining_loader_data->record_dependency(local_interfaces->at(i));
4511 }
4512 }
4513 }
4514 }
4515
4516 // utility methods for appending an array with check for duplicates
4517
4518 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4519 const Array<InstanceKlass*>* const ifs) {
4520 // iterate over new interfaces
4521 for (int i = 0; i < ifs->length(); i++) {
4522 InstanceKlass* const e = ifs->at(i);
4523 assert(e->is_klass() && e->is_interface(), "just checking");
4524 // add new interface
4525 result->append_if_missing(e);
4526 }
4527 }
4528
4529 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4530 Array<InstanceKlass*>* local_ifs,
4531 ClassLoaderData* loader_data,
4532 TRAPS) {
4533 assert(local_ifs != NULL, "invariant");
4534 assert(loader_data != NULL, "invariant");
4535
4536 // Compute maximum size for transitive interfaces
4537 int max_transitive_size = 0;
4538 int super_size = 0;
4539 // Add superclass transitive interfaces size
4540 if (super != NULL) {
4541 super_size = super->transitive_interfaces()->length();
4542 max_transitive_size += super_size;
4543 }
4544 // Add local interfaces' super interfaces
4545 const int local_size = local_ifs->length();
4546 for (int i = 0; i < local_size; i++) {
4547 InstanceKlass* const l = local_ifs->at(i);
4548 max_transitive_size += l->transitive_interfaces()->length();
4549 }
4550 // Finally add local interfaces
4551 max_transitive_size += local_size;
4552 // Construct array
4553 if (max_transitive_size == 0) {
4554 // no interfaces, use canonicalized array
4555 return Universe::the_empty_instance_klass_array();
4556 } else if (max_transitive_size == super_size) {
4557 // no new local interfaces added, share superklass' transitive interface array
4558 return super->transitive_interfaces();
4559 } else if (max_transitive_size == local_size) {
4560 // only local interfaces added, share local interface array
4561 return local_ifs;
4562 } else {
4563 ResourceMark rm;
4564 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4565
4566 // Copy down from superclass
4567 if (super != NULL) {
4568 append_interfaces(result, super->transitive_interfaces());
4569 }
4570
4571 // Copy down from local interfaces' superinterfaces
4572 for (int i = 0; i < local_size; i++) {
4573 InstanceKlass* const l = local_ifs->at(i);
4574 append_interfaces(result, l->transitive_interfaces());
4575 }
4576 // Finally add local interfaces
4577 append_interfaces(result, local_ifs);
4578
4579 // length will be less than the max_transitive_size if duplicates were removed
4580 const int length = result->length();
4581 assert(length <= max_transitive_size, "just checking");
4582 Array<InstanceKlass*>* const new_result =
4583 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4584 for (int i = 0; i < length; i++) {
4585 InstanceKlass* const e = result->at(i);
4586 assert(e != NULL, "just checking");
4587 new_result->at_put(i, e);
4588 }
4589 return new_result;
4590 }
4591 }
4592
4593 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4594 assert(this_klass != NULL, "invariant");
4595 const Klass* const super = this_klass->super();
4596 if (super != NULL) {
4597
4598 // If the loader is not the boot loader then throw an exception if its
4599 // superclass is in package jdk.internal.reflect and its loader is not a
4600 // special reflection class loader
4601 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4602 assert(super->is_instance_klass(), "super is not instance klass");
4603 PackageEntry* super_package = super->package();
4604 if (super_package != NULL &&
4605 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4606 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4607 ResourceMark rm(THREAD);
4608 Exceptions::fthrow(
4609 THREAD_AND_LOCATION,
4610 vmSymbols::java_lang_IllegalAccessError(),
4611 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4612 this_klass->external_name(),
4613 this_klass->class_loader_data()->loader_name_and_id(),
4614 super->external_name());
4615 return;
4616 }
4617 }
4618
4619 Reflection::VerifyClassAccessResults vca_result =
4620 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4621 if (vca_result != Reflection::ACCESS_OK) {
4622 ResourceMark rm(THREAD);
4623 char* msg = Reflection::verify_class_access_msg(this_klass,
4624 InstanceKlass::cast(super),
4625 vca_result);
4626 if (msg == NULL) {
4627 bool same_module = (this_klass->module() == super->module());
4628 Exceptions::fthrow(
4629 THREAD_AND_LOCATION,
4630 vmSymbols::java_lang_IllegalAccessError(),
4631 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4632 this_klass->external_name(),
4633 super->is_abstract() ? "abstract " : "",
4634 super->external_name(),
4635 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4636 (same_module) ? "" : "; ",
4637 (same_module) ? "" : super->class_in_module_of_loader());
4638 } else {
4639 // Add additional message content.
4640 Exceptions::fthrow(
4641 THREAD_AND_LOCATION,
4642 vmSymbols::java_lang_IllegalAccessError(),
4643 "superclass access check failed: %s",
4644 msg);
4645 }
4646 }
4647 }
4648 }
4649
4650
4651 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4652 assert(this_klass != NULL, "invariant");
4653 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4654 const int lng = local_interfaces->length();
4655 for (int i = lng - 1; i >= 0; i--) {
4656 InstanceKlass* const k = local_interfaces->at(i);
4657 assert (k != NULL && k->is_interface(), "invalid interface");
4658 Reflection::VerifyClassAccessResults vca_result =
4659 Reflection::verify_class_access(this_klass, k, false);
4660 if (vca_result != Reflection::ACCESS_OK) {
4661 ResourceMark rm(THREAD);
4662 char* msg = Reflection::verify_class_access_msg(this_klass,
4663 k,
4664 vca_result);
4665 if (msg == NULL) {
4666 bool same_module = (this_klass->module() == k->module());
4667 Exceptions::fthrow(
4668 THREAD_AND_LOCATION,
4669 vmSymbols::java_lang_IllegalAccessError(),
4670 "class %s cannot access its superinterface %s (%s%s%s)",
4671 this_klass->external_name(),
4672 k->external_name(),
4673 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4674 (same_module) ? "" : "; ",
4675 (same_module) ? "" : k->class_in_module_of_loader());
4676 } else {
4677 // Add additional message content.
4678 Exceptions::fthrow(
4679 THREAD_AND_LOCATION,
4680 vmSymbols::java_lang_IllegalAccessError(),
4681 "superinterface check failed: %s",
4682 msg);
4683 }
4684 }
4685 }
4686 }
4687
4688
4689 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4690 assert(this_klass != NULL, "invariant");
4691 const Array<Method*>* const methods = this_klass->methods();
4692 const int num_methods = methods->length();
4693
4694 // go thru each method and check if it overrides a final method
4695 for (int index = 0; index < num_methods; index++) {
4696 const Method* const m = methods->at(index);
4697
4698 // skip private, static, and <init> methods
4699 if ((!m->is_private() && !m->is_static()) &&
4700 (m->name() != vmSymbols::object_initializer_name())) {
4701
4702 const Symbol* const name = m->name();
4703 const Symbol* const signature = m->signature();
4704 const Klass* k = this_klass->super();
4705 const Method* super_m = NULL;
4706 while (k != NULL) {
4707 // skip supers that don't have final methods.
4708 if (k->has_final_method()) {
4709 // lookup a matching method in the super class hierarchy
4710 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4711 if (super_m == NULL) {
4712 break; // didn't find any match; get out
4713 }
4714
4715 if (super_m->is_final() && !super_m->is_static() &&
4716 !super_m->access_flags().is_private()) {
4717 // matching method in super is final, and not static or private
4718 bool can_access = Reflection::verify_member_access(this_klass,
4719 super_m->method_holder(),
4720 super_m->method_holder(),
4721 super_m->access_flags(),
4722 false, false, CHECK);
4723 if (can_access) {
4724 // this class can access super final method and therefore override
4725 ResourceMark rm(THREAD);
4726 Exceptions::fthrow(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
4738 // continue to look from super_m's holder's super.
4739 k = super_m->method_holder()->super();
4740 continue;
4741 }
4742
4743 k = k->super();
4744 }
4745 }
4746 }
4747 }
4748
4749
4750 // assumes that this_klass is an interface
4751 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4752 assert(this_klass != NULL, "invariant");
4753 assert(this_klass->is_interface(), "not an interface");
4754 const Array<Method*>* methods = this_klass->methods();
4755 const int num_methods = methods->length();
4756
4757 for (int index = 0; index < num_methods; index++) {
4758 const Method* const m = methods->at(index);
4759 // if m is static and not the init method, throw a verify error
4760 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4761 ResourceMark rm(THREAD);
4762 Exceptions::fthrow(
4763 THREAD_AND_LOCATION,
4764 vmSymbols::java_lang_VerifyError(),
4765 "Illegal static method %s in interface %s",
4766 m->name()->as_C_string(),
4767 this_klass->external_name()
4768 );
4769 return;
4770 }
4771 }
4772 }
4773
4774 // utility methods for format checking
4775
4776 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4777 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4778 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4779 if (is_module) {
4780 ResourceMark rm(THREAD);
4781 Exceptions::fthrow(
4782 THREAD_AND_LOCATION,
4783 vmSymbols::java_lang_NoClassDefFoundError(),
4784 "%s is not a class because access_flag ACC_MODULE is set",
4785 _class_name->as_C_string());
4786 return;
4787 }
4788
4789 if (!_need_verify) { return; }
4790
4791 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4792 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4793 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4794 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4795 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4796 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4797 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4798
4799 if ((is_abstract && is_final) ||
4800 (is_interface && !is_abstract) ||
4801 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4802 (!is_interface && major_gte_15 && is_annotation)) {
4803 ResourceMark rm(THREAD);
4804 Exceptions::fthrow(
4805 THREAD_AND_LOCATION,
4806 vmSymbols::java_lang_ClassFormatError(),
4807 "Illegal class modifiers in class %s: 0x%X",
4808 _class_name->as_C_string(), flags
4809 );
4810 return;
4811 }
4812 }
4813
4814 static bool has_illegal_visibility(jint flags) {
4815 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4816 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4817 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4818
4819 return ((is_public && is_protected) ||
4820 (is_public && is_private) ||
4821 (is_protected && is_private));
4822 }
4823
4824 // A legal major_version.minor_version must be one of the following:
4825 //
4826 // Major_version = 45, any minor_version.
4827 // Major_version >= 46 and major_version <= current_major_version and minor_version = 0.
4828 // Major_version = current_major_version and minor_version = 65535 and --enable-preview is present.
4829 //
4830 static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4831 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4832 if (major != JAVA_MIN_SUPPORTED_VERSION) { // All 45.* are ok including 45.65535
4833 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4834 if (major != max_version) {
4835 ResourceMark rm(THREAD);
4836 Exceptions::fthrow(
4837 THREAD_AND_LOCATION,
4838 vmSymbols::java_lang_UnsupportedClassVersionError(),
4839 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4840 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4841 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4842 return;
4843 }
4844
4845 if (!Arguments::enable_preview()) {
4846 ResourceMark rm(THREAD);
4847 Exceptions::fthrow(
4848 THREAD_AND_LOCATION,
4849 vmSymbols::java_lang_UnsupportedClassVersionError(),
4850 "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4851 class_name->as_C_string(), major, minor);
4852 return;
4853 }
4854
4855 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4856 if (major > max_version) {
4857 ResourceMark rm(THREAD);
4858 Exceptions::fthrow(
4859 THREAD_AND_LOCATION,
4860 vmSymbols::java_lang_UnsupportedClassVersionError(),
4861 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4862 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4863 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4864 } else if (major < JAVA_MIN_SUPPORTED_VERSION) {
4865 ResourceMark rm(THREAD);
4866 Exceptions::fthrow(
4867 THREAD_AND_LOCATION,
4868 vmSymbols::java_lang_UnsupportedClassVersionError(),
4869 "%s (class file version %u.%u) was compiled with an invalid major version",
4870 class_name->as_C_string(), major, minor);
4871 } else if (minor != 0) {
4872 ResourceMark rm(THREAD);
4873 Exceptions::fthrow(
4874 THREAD_AND_LOCATION,
4875 vmSymbols::java_lang_UnsupportedClassVersionError(),
4876 "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4877 class_name->as_C_string(), major, minor);
4878 }
4879 }
4880 }
4881 }
4882
4883 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4884 bool is_interface,
4885 TRAPS) const {
4886 if (!_need_verify) { return; }
4887
4888 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4889 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4890 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4891 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4892 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4893 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4894 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4895 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4896 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4897
4898 bool is_illegal = false;
4899
4900 if (is_interface) {
4901 if (!is_public || !is_static || !is_final || is_private ||
4902 is_protected || is_volatile || is_transient ||
4903 (major_gte_15 && is_enum)) {
4904 is_illegal = true;
4905 }
4906 } else { // not interface
4907 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4908 is_illegal = true;
4909 }
4910 }
4911
4912 if (is_illegal) {
4913 ResourceMark rm(THREAD);
4914 Exceptions::fthrow(
4915 THREAD_AND_LOCATION,
4916 vmSymbols::java_lang_ClassFormatError(),
4917 "Illegal field modifiers in class %s: 0x%X",
4918 _class_name->as_C_string(), flags);
4919 return;
4920 }
4921 }
4922
4923 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4924 bool is_interface,
4925 const Symbol* name,
4926 TRAPS) const {
4927 if (!_need_verify) { return; }
4928
4929 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4930 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4931 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4932 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4933 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4934 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4935 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4936 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4937 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4938 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4939 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4940 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4941 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4942
4943 bool is_illegal = false;
4944
4945 if (is_interface) {
4946 if (major_gte_8) {
4947 // Class file version is JAVA_8_VERSION or later Methods of
4948 // interfaces may set any of the flags except ACC_PROTECTED,
4949 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4950 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4951 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4952 (is_native || is_protected || is_final || is_synchronized) ||
4953 // If a specific method of a class or interface has its
4954 // ACC_ABSTRACT flag set, it must not have any of its
4955 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4956 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4957 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4958 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4959 (is_abstract && (is_private || is_static || is_strict))) {
4960 is_illegal = true;
4961 }
4962 } else if (major_gte_15) {
4963 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4964 if (!is_public || is_private || is_protected || is_static || is_final ||
4965 is_synchronized || is_native || !is_abstract || is_strict) {
4966 is_illegal = true;
4967 }
4968 } else {
4969 // Class file version is pre-JAVA_1_5_VERSION
4970 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4971 is_illegal = true;
4972 }
4973 }
4974 } else { // not interface
4975 if (has_illegal_visibility(flags)) {
4976 is_illegal = true;
4977 } else {
4978 if (is_initializer) {
4979 if (is_static || is_final || is_synchronized || is_native ||
4980 is_abstract || (major_gte_15 && is_bridge)) {
4981 is_illegal = true;
4982 }
4983 } else { // not initializer
4984 if (is_abstract) {
4985 if ((is_final || is_native || is_private || is_static ||
4986 (major_gte_15 && (is_synchronized || is_strict)))) {
4987 is_illegal = true;
4988 }
4989 }
4990 }
4991 }
4992 }
4993
4994 if (is_illegal) {
4995 ResourceMark rm(THREAD);
4996 Exceptions::fthrow(
4997 THREAD_AND_LOCATION,
4998 vmSymbols::java_lang_ClassFormatError(),
4999 "Method %s in class %s has illegal modifiers: 0x%X",
5000 name->as_C_string(), _class_name->as_C_string(), flags);
5001 return;
5002 }
5003 }
5004
5005 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
5006 int length,
5007 TRAPS) const {
5008 assert(_need_verify, "only called when _need_verify is true");
5009 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
5010 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5011 }
5012 }
5013
5014 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5015 // In class names, '/' separates unqualified names. This is verified in this function also.
5016 // Method names also may not contain the characters '<' or '>', unless <init>
5017 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5018 // method. Because these names have been checked as special cases before
5019 // calling this method in verify_legal_method_name.
5020 //
5021 // This method is also called from the modular system APIs in modules.cpp
5022 // to verify the validity of module and package names.
5023 bool ClassFileParser::verify_unqualified_name(const char* name,
5024 unsigned int length,
5025 int type) {
5026 for (const char* p = name; p != name + length;) {
5027 jchar ch = *p;
5028 if (ch < 128) {
5029 if (ch == '.' || ch == ';' || ch == '[' ) {
5030 return false; // do not permit '.', ';', or '['
5031 }
5032 if (ch == '/') {
5033 // check for '//' or leading or trailing '/' which are not legal
5034 // unqualified name must not be empty
5035 if (type == ClassFileParser::LegalClass) {
5036 if (p == name || p+1 >= name+length || *(p+1) == '/') {
5037 return false;
5038 }
5039 } else {
5040 return false; // do not permit '/' unless it's class name
5041 }
5042 }
5043 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
5044 return false; // do not permit '<' or '>' in method names
5045 }
5046 p++;
5047 } else {
5048 char* tmp_p = UTF8::next(p, &ch);
5049 p = tmp_p;
5050 }
5051 }
5052 return true;
5053 }
5054
5055 // Take pointer to a string. Skip over the longest part of the string that could
5056 // be taken as a fieldname. Allow '/' if slash_ok is true.
5057 // Return a pointer to just past the fieldname.
5058 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5059 // being true, we saw consecutive slashes (meaning we were looking for a
5060 // qualified path but found something that was badly-formed).
5061 static const char* skip_over_field_name(const char* name,
5062 bool slash_ok,
5063 unsigned int length) {
5064 const char* p;
5065 jboolean last_is_slash = false;
5066 jboolean not_first_ch = false;
5067
5068 for (p = name; p != name + length; not_first_ch = true) {
5069 const char* old_p = p;
5070 jchar ch = *p;
5071 if (ch < 128) {
5072 p++;
5073 // quick check for ascii
5074 if ((ch >= 'a' && ch <= 'z') ||
5075 (ch >= 'A' && ch <= 'Z') ||
5076 (ch == '_' || ch == '$') ||
5077 (not_first_ch && ch >= '0' && ch <= '9')) {
5078 last_is_slash = false;
5079 continue;
5080 }
5081 if (slash_ok && ch == '/') {
5082 if (last_is_slash) {
5083 return NULL; // Don't permit consecutive slashes
5084 }
5085 last_is_slash = true;
5086 continue;
5087 }
5088 }
5089 else {
5090 jint unicode_ch;
5091 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5092 p = tmp_p;
5093 last_is_slash = false;
5094 // Check if ch is Java identifier start or is Java identifier part
5095 // 4672820: call java.lang.Character methods directly without generating separate tables.
5096 EXCEPTION_MARK;
5097
5098 // return value
5099 JavaValue result(T_BOOLEAN);
5100 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
5101 JavaCallArguments args;
5102 args.push_int(unicode_ch);
5103
5104 // public static boolean isJavaIdentifierStart(char ch);
5105 JavaCalls::call_static(&result,
5106 SystemDictionary::Character_klass(),
5107 vmSymbols::isJavaIdentifierStart_name(),
5108 vmSymbols::int_bool_signature(),
5109 &args,
5110 THREAD);
5111
5112 if (HAS_PENDING_EXCEPTION) {
5113 CLEAR_PENDING_EXCEPTION;
5114 return 0;
5115 }
5116 if (result.get_jboolean()) {
5117 continue;
5118 }
5119
5120 if (not_first_ch) {
5121 // public static boolean isJavaIdentifierPart(char ch);
5122 JavaCalls::call_static(&result,
5123 SystemDictionary::Character_klass(),
5124 vmSymbols::isJavaIdentifierPart_name(),
5125 vmSymbols::int_bool_signature(),
5126 &args,
5127 THREAD);
5128
5129 if (HAS_PENDING_EXCEPTION) {
5130 CLEAR_PENDING_EXCEPTION;
5131 return 0;
5132 }
5133
5134 if (result.get_jboolean()) {
5135 continue;
5136 }
5137 }
5138 }
5139 return (not_first_ch) ? old_p : NULL;
5140 }
5141 return (not_first_ch) ? p : NULL;
5142 }
5143
5144 // Take pointer to a string. Skip over the longest part of the string that could
5145 // be taken as a field signature. Allow "void" if void_ok.
5146 // Return a pointer to just past the signature.
5147 // Return NULL if no legal signature is found.
5148 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5149 bool void_ok,
5150 unsigned int length,
5151 TRAPS) const {
5152 unsigned int array_dim = 0;
5153 while (length > 0) {
5154 switch (signature[0]) {
5155 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5156 case JVM_SIGNATURE_BOOLEAN:
5157 case JVM_SIGNATURE_BYTE:
5158 case JVM_SIGNATURE_CHAR:
5159 case JVM_SIGNATURE_SHORT:
5160 case JVM_SIGNATURE_INT:
5161 case JVM_SIGNATURE_FLOAT:
5162 case JVM_SIGNATURE_LONG:
5163 case JVM_SIGNATURE_DOUBLE:
5164 return signature + 1;
5165 case JVM_SIGNATURE_CLASS: {
5166 if (_major_version < JAVA_1_5_VERSION) {
5167 // Skip over the class name if one is there
5168 const char* const p = skip_over_field_name(signature + 1, true, --length);
5169
5170 // The next character better be a semicolon
5171 if (p && (p - signature) > 1 && p[0] == ';') {
5172 return p + 1;
5173 }
5174 }
5175 else {
5176 // Skip leading 'L' and ignore first appearance of ';'
5177 length--;
5178 signature++;
5179 char* c = strchr((char*) signature, ';');
5180 // Format check signature
5181 if (c != NULL) {
5182 ResourceMark rm(THREAD);
5183 int newlen = c - (char*) signature;
5184 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
5185 strncpy(sig, signature, newlen);
5186 sig[newlen] = '\0';
5187
5188 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
5189 if (!legal) {
5190 classfile_parse_error("Class name contains illegal character "
5191 "in descriptor in class file %s",
5192 CHECK_0);
5193 return NULL;
5194 }
5195 return signature + newlen + 1;
5196 }
5197 }
5198 return NULL;
5199 }
5200 case JVM_SIGNATURE_ARRAY:
5201 array_dim++;
5202 if (array_dim > 255) {
5203 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5204 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5205 }
5206 // The rest of what's there better be a legal signature
5207 signature++;
5208 length--;
5209 void_ok = false;
5210 break;
5211 default:
5212 return NULL;
5213 }
5214 }
5215 return NULL;
5216 }
5217
5218 // Checks if name is a legal class name.
5219 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5220 if (!_need_verify || _relax_verify) { return; }
5221
5222 char buf[fixed_buffer_size];
5223 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5224 unsigned int length = name->utf8_length();
5225 bool legal = false;
5226
5227 if (length > 0) {
5228 const char* p;
5229 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5230 p = skip_over_field_signature(bytes, false, length, CHECK);
5231 legal = (p != NULL) && ((p - bytes) == (int)length);
5232 } else if (_major_version < JAVA_1_5_VERSION) {
5233 if (bytes[0] != '<') {
5234 p = skip_over_field_name(bytes, true, length);
5235 legal = (p != NULL) && ((p - bytes) == (int)length);
5236 }
5237 } else {
5238 // 4900761: relax the constraints based on JSR202 spec
5239 // Class names may be drawn from the entire Unicode character set.
5240 // Identifiers between '/' must be unqualified names.
5241 // The utf8 string has been verified when parsing cpool entries.
5242 legal = verify_unqualified_name(bytes, length, LegalClass);
5243 }
5244 }
5245 if (!legal) {
5246 ResourceMark rm(THREAD);
5247 assert(_class_name != NULL, "invariant");
5248 Exceptions::fthrow(
5249 THREAD_AND_LOCATION,
5250 vmSymbols::java_lang_ClassFormatError(),
5251 "Illegal class name \"%s\" in class file %s", bytes,
5252 _class_name->as_C_string()
5253 );
5254 return;
5255 }
5256 }
5257
5258 // Checks if name is a legal field name.
5259 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5260 if (!_need_verify || _relax_verify) { return; }
5261
5262 char buf[fixed_buffer_size];
5263 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5264 unsigned int length = name->utf8_length();
5265 bool legal = false;
5266
5267 if (length > 0) {
5268 if (_major_version < JAVA_1_5_VERSION) {
5269 if (bytes[0] != '<') {
5270 const char* p = skip_over_field_name(bytes, false, length);
5271 legal = (p != NULL) && ((p - bytes) == (int)length);
5272 }
5273 } else {
5274 // 4881221: relax the constraints based on JSR202 spec
5275 legal = verify_unqualified_name(bytes, length, LegalField);
5276 }
5277 }
5278
5279 if (!legal) {
5280 ResourceMark rm(THREAD);
5281 assert(_class_name != NULL, "invariant");
5282 Exceptions::fthrow(
5283 THREAD_AND_LOCATION,
5284 vmSymbols::java_lang_ClassFormatError(),
5285 "Illegal field name \"%s\" in class %s", bytes,
5286 _class_name->as_C_string()
5287 );
5288 return;
5289 }
5290 }
5291
5292 // Checks if name is a legal method name.
5293 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5294 if (!_need_verify || _relax_verify) { return; }
5295
5296 assert(name != NULL, "method name is null");
5297 char buf[fixed_buffer_size];
5298 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5299 unsigned int length = name->utf8_length();
5300 bool legal = false;
5301
5302 if (length > 0) {
5303 if (bytes[0] == '<') {
5304 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5305 legal = true;
5306 }
5307 } else if (_major_version < JAVA_1_5_VERSION) {
5308 const char* p;
5309 p = skip_over_field_name(bytes, false, length);
5310 legal = (p != NULL) && ((p - bytes) == (int)length);
5311 } else {
5312 // 4881221: relax the constraints based on JSR202 spec
5313 legal = verify_unqualified_name(bytes, length, LegalMethod);
5314 }
5315 }
5316
5317 if (!legal) {
5318 ResourceMark rm(THREAD);
5319 assert(_class_name != NULL, "invariant");
5320 Exceptions::fthrow(
5321 THREAD_AND_LOCATION,
5322 vmSymbols::java_lang_ClassFormatError(),
5323 "Illegal method name \"%s\" in class %s", bytes,
5324 _class_name->as_C_string()
5325 );
5326 return;
5327 }
5328 }
5329
5330
5331 // Checks if signature is a legal field signature.
5332 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5333 const Symbol* signature,
5334 TRAPS) const {
5335 if (!_need_verify) { return; }
5336
5337 char buf[fixed_buffer_size];
5338 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5339 const unsigned int length = signature->utf8_length();
5340 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5341
5342 if (p == NULL || (p - bytes) != (int)length) {
5343 throwIllegalSignature("Field", name, signature, CHECK);
5344 }
5345 }
5346
5347 // Checks if signature is a legal method signature.
5348 // Returns number of parameters
5349 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5350 const Symbol* signature,
5351 TRAPS) const {
5352 if (!_need_verify) {
5353 // make sure caller's args_size will be less than 0 even for non-static
5354 // method so it will be recomputed in compute_size_of_parameters().
5355 return -2;
5356 }
5357
5358 // Class initializers cannot have args for class format version >= 51.
5359 if (name == vmSymbols::class_initializer_name() &&
5360 signature != vmSymbols::void_method_signature() &&
5361 _major_version >= JAVA_7_VERSION) {
5362 throwIllegalSignature("Method", name, signature, CHECK_0);
5363 return 0;
5364 }
5365
5366 unsigned int args_size = 0;
5367 char buf[fixed_buffer_size];
5368 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5369 unsigned int length = signature->utf8_length();
5370 const char* nextp;
5371
5372 // The first character must be a '('
5373 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5374 length--;
5375 // Skip over legal field signatures
5376 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5377 while ((length > 0) && (nextp != NULL)) {
5378 args_size++;
5379 if (p[0] == 'J' || p[0] == 'D') {
5380 args_size++;
5381 }
5382 length -= nextp - p;
5383 p = nextp;
5384 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5385 }
5386 // The first non-signature thing better be a ')'
5387 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5388 length--;
5389 if (name->utf8_length() > 0 && name->char_at(0) == '<') {
5390 // All internal methods must return void
5391 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5392 return args_size;
5393 }
5394 } else {
5395 // Now we better just have a return value
5396 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5397 if (nextp && ((int)length == (nextp - p))) {
5398 return args_size;
5399 }
5400 }
5401 }
5402 }
5403 // Report error
5404 throwIllegalSignature("Method", name, signature, CHECK_0);
5405 return 0;
5406 }
5407
5408 int ClassFileParser::static_field_size() const {
5409 assert(_field_info != NULL, "invariant");
5410 return _field_info->static_field_size;
5411 }
5412
5413 int ClassFileParser::total_oop_map_count() const {
5414 assert(_field_info != NULL, "invariant");
5415 return _field_info->total_oop_map_count;
5416 }
5417
5418 jint ClassFileParser::layout_size() const {
5419 assert(_field_info != NULL, "invariant");
5420 return _field_info->instance_size;
5421 }
5422
5423 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5424 const Array<Method*>* methods) {
5425 assert(ik != NULL, "invariant");
5426 assert(methods != NULL, "invariant");
5427
5428 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5429 // (We used to do this lazily, but now we query it in Rewriter,
5430 // which is eagerly done for every method, so we might as well do it now,
5431 // when everything is fresh in memory.)
5432 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5433
5434 if (klass_id != vmSymbols::NO_SID) {
5435 for (int j = 0; j < methods->length(); ++j) {
5436 Method* method = methods->at(j);
5437 method->init_intrinsic_id();
5438
5439 if (CheckIntrinsics) {
5440 // Check if an intrinsic is defined for method 'method',
5441 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5442 if (method->intrinsic_id() != vmIntrinsics::_none &&
5443 !method->intrinsic_candidate()) {
5444 tty->print("Compiler intrinsic is defined for method [%s], "
5445 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5446 method->name_and_sig_as_C_string(),
5447 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5448 );
5449 tty->cr();
5450 DEBUG_ONLY(vm_exit(1));
5451 }
5452 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5453 // but there is no intrinsic available for it.
5454 if (method->intrinsic_candidate() &&
5455 method->intrinsic_id() == vmIntrinsics::_none) {
5456 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5457 "but no compiler intrinsic is defined for the method.%s",
5458 method->name_and_sig_as_C_string(),
5459 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5460 );
5461 tty->cr();
5462 DEBUG_ONLY(vm_exit(1));
5463 }
5464 }
5465 } // end for
5466
5467 #ifdef ASSERT
5468 if (CheckIntrinsics) {
5469 // Check for orphan methods in the current class. A method m
5470 // of a class C is orphan if an intrinsic is defined for method m,
5471 // but class C does not declare m.
5472 // The check is potentially expensive, therefore it is available
5473 // only in debug builds.
5474
5475 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5476 if (vmIntrinsics::_compiledLambdaForm == id) {
5477 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5478 // generated for the JVM from a LambdaForm and therefore no method
5479 // is defined for it.
5480 continue;
5481 }
5482
5483 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5484 // Check if the current class contains a method with the same
5485 // name, flags, signature.
5486 bool match = false;
5487 for (int j = 0; j < methods->length(); ++j) {
5488 const Method* method = methods->at(j);
5489 if (method->intrinsic_id() == id) {
5490 match = true;
5491 break;
5492 }
5493 }
5494
5495 if (!match) {
5496 char buf[1000];
5497 tty->print("Compiler intrinsic is defined for method [%s], "
5498 "but the method is not available in class [%s].%s",
5499 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5500 buf, sizeof(buf)),
5501 ik->name()->as_C_string(),
5502 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5503 );
5504 tty->cr();
5505 DEBUG_ONLY(vm_exit(1));
5506 }
5507 }
5508 } // end for
5509 } // CheckIntrinsics
5510 #endif // ASSERT
5511 }
5512 }
5513
5514 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5515 if (_klass != NULL) {
5516 return _klass;
5517 }
5518
5519 InstanceKlass* const ik =
5520 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5521
5522 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5523
5524 assert(_klass == ik, "invariant");
5525
5526
5527 if (ik->should_store_fingerprint()) {
5528 ik->store_fingerprint(_stream->compute_fingerprint());
5529 }
5530
5531 ik->set_has_passed_fingerprint_check(false);
5532 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5533 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5534 uint64_t fp = ik->has_stored_fingerprint() ? ik->get_stored_fingerprint() : _stream->compute_fingerprint();
5535 if (aot_fp != 0 && aot_fp == fp) {
5536 // This class matches with a class saved in an AOT library
5537 ik->set_has_passed_fingerprint_check(true);
5538 } else {
5539 ResourceMark rm;
5540 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5541 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5542 }
5543 }
5544
5545 return ik;
5546 }
5547
5548 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5549 assert(ik != NULL, "invariant");
5550
5551 // Set name and CLD before adding to CLD
5552 ik->set_class_loader_data(_loader_data);
5553 ik->set_name(_class_name);
5554
5555 // Add all classes to our internal class loader list here,
5556 // including classes in the bootstrap (NULL) class loader.
5557 const bool publicize = !is_internal();
5558
5559 _loader_data->add_class(ik, publicize);
5560
5561 set_klass_to_deallocate(ik);
5562
5563 assert(_field_info != NULL, "invariant");
5564 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5565 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5566 "sanity");
5567
5568 assert(ik->is_instance_klass(), "sanity");
5569 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5570
5571 // Fill in information already parsed
5572 ik->set_should_verify_class(_need_verify);
5573
5574 // Not yet: supers are done below to support the new subtype-checking fields
5575 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5576 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5577 assert(_fac != NULL, "invariant");
5578 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5579
5580 // this transfers ownership of a lot of arrays from
5581 // the parser onto the InstanceKlass*
5582 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5583
5584 // note that is not safe to use the fields in the parser from this point on
5585 assert(NULL == _cp, "invariant");
5586 assert(NULL == _fields, "invariant");
5587 assert(NULL == _methods, "invariant");
5588 assert(NULL == _inner_classes, "invariant");
5589 assert(NULL == _nest_members, "invariant");
5590 assert(NULL == _local_interfaces, "invariant");
5591 assert(NULL == _combined_annotations, "invariant");
5592
5593 if (_has_final_method) {
5594 ik->set_has_final_method();
5595 }
5596
5597 ik->copy_method_ordering(_method_ordering, CHECK);
5598 // The InstanceKlass::_methods_jmethod_ids cache
5599 // is managed on the assumption that the initial cache
5600 // size is equal to the number of methods in the class. If
5601 // that changes, then InstanceKlass::idnum_can_increment()
5602 // has to be changed accordingly.
5603 ik->set_initial_method_idnum(ik->methods()->length());
5604
5605 ik->set_this_class_index(_this_class_index);
5606
5607 if (is_unsafe_anonymous()) {
5608 // _this_class_index is a CONSTANT_Class entry that refers to this
5609 // anonymous class itself. If this class needs to refer to its own methods or
5610 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5611 // _this_class_index. However, because this class is anonymous (it's
5612 // not stored in SystemDictionary), _this_class_index cannot be resolved
5613 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5614 // Therefore, we must eagerly resolve _this_class_index now.
5615 ik->constants()->klass_at_put(_this_class_index, ik);
5616 }
5617
5618 ik->set_minor_version(_minor_version);
5619 ik->set_major_version(_major_version);
5620 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5621 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5622
5623 if (_unsafe_anonymous_host != NULL) {
5624 assert (ik->is_unsafe_anonymous(), "should be the same");
5625 ik->set_unsafe_anonymous_host(_unsafe_anonymous_host);
5626 }
5627
5628 // Set PackageEntry for this_klass
5629 oop cl = ik->class_loader();
5630 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5631 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5632 ik->set_package(cld, CHECK);
5633
5634 const Array<Method*>* const methods = ik->methods();
5635 assert(methods != NULL, "invariant");
5636 const int methods_len = methods->length();
5637
5638 check_methods_for_intrinsics(ik, methods);
5639
5640 // Fill in field values obtained by parse_classfile_attributes
5641 if (_parsed_annotations->has_any_annotations()) {
5642 _parsed_annotations->apply_to(ik);
5643 }
5644
5645 apply_parsed_class_attributes(ik);
5646
5647 // Miranda methods
5648 if ((_num_miranda_methods > 0) ||
5649 // if this class introduced new miranda methods or
5650 (_super_klass != NULL && _super_klass->has_miranda_methods())
5651 // super class exists and this class inherited miranda methods
5652 ) {
5653 ik->set_has_miranda_methods(); // then set a flag
5654 }
5655
5656 // Fill in information needed to compute superclasses.
5657 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5658 ik->set_transitive_interfaces(_transitive_interfaces);
5659 _transitive_interfaces = NULL;
5660
5661 // Initialize itable offset tables
5662 klassItable::setup_itable_offset_table(ik);
5663
5664 // Compute transitive closure of interfaces this class implements
5665 // Do final class setup
5666 fill_oop_maps(ik,
5667 _field_info->nonstatic_oop_map_count,
5668 _field_info->nonstatic_oop_offsets,
5669 _field_info->nonstatic_oop_counts);
5670
5671 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5672 set_precomputed_flags(ik);
5673
5674 // check if this class can access its super class
5675 check_super_class_access(ik, CHECK);
5676
5677 // check if this class can access its superinterfaces
5678 check_super_interface_access(ik, CHECK);
5679
5680 // check if this class overrides any final method
5681 check_final_method_override(ik, CHECK);
5682
5683 // reject static interface methods prior to Java 8
5684 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5685 check_illegal_static_method(ik, CHECK);
5686 }
5687
5688 // Obtain this_klass' module entry
5689 ModuleEntry* module_entry = ik->module();
5690 assert(module_entry != NULL, "module_entry should always be set");
5691
5692 // Obtain java.lang.Module
5693 Handle module_handle(THREAD, module_entry->module());
5694
5695 // Allocate mirror and initialize static fields
5696 // The create_mirror() call will also call compute_modifiers()
5697 java_lang_Class::create_mirror(ik,
5698 Handle(THREAD, _loader_data->class_loader()),
5699 module_handle,
5700 _protection_domain,
5701 CHECK);
5702
5703 assert(_all_mirandas != NULL, "invariant");
5704
5705 // Generate any default methods - default methods are public interface methods
5706 // that have a default implementation. This is new with Java 8.
5707 if (_has_nonstatic_concrete_methods) {
5708 DefaultMethods::generate_default_methods(ik,
5709 _all_mirandas,
5710 CHECK);
5711 }
5712
5713 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5714 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5715 !module_entry->has_default_read_edges()) {
5716 if (!module_entry->set_has_default_read_edges()) {
5717 // We won a potential race
5718 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5719 }
5720 }
5721
5722 // Update the loader_data graph.
5723 record_defined_class_dependencies(ik, CHECK);
5724
5725 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5726
5727 if (!is_internal()) {
5728 if (log_is_enabled(Info, class, load)) {
5729 ResourceMark rm;
5730 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5731 ik->print_class_load_logging(_loader_data, module_name, _stream);
5732 }
5733
5734 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5735 ik->major_version() != JAVA_MIN_SUPPORTED_VERSION &&
5736 log_is_enabled(Info, class, preview)) {
5737 ResourceMark rm;
5738 log_info(class, preview)("Loading preview feature type %s", ik->external_name());
5739 }
5740
5741 if (log_is_enabled(Debug, class, resolve)) {
5742 ResourceMark rm;
5743 // print out the superclass.
5744 const char * from = ik->external_name();
5745 if (ik->java_super() != NULL) {
5746 log_debug(class, resolve)("%s %s (super)",
5747 from,
5748 ik->java_super()->external_name());
5749 }
5750 // print out each of the interface classes referred to by this class.
5751 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5752 if (local_interfaces != NULL) {
5753 const int length = local_interfaces->length();
5754 for (int i = 0; i < length; i++) {
5755 const InstanceKlass* const k = local_interfaces->at(i);
5756 const char * to = k->external_name();
5757 log_debug(class, resolve)("%s %s (interface)", from, to);
5758 }
5759 }
5760 }
5761 }
5762
5763 JFR_ONLY(INIT_ID(ik);)
5764
5765 // If we reach here, all is well.
5766 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5767 // in order for it to not be destroyed in the ClassFileParser destructor.
5768 set_klass_to_deallocate(NULL);
5769
5770 // it's official
5771 set_klass(ik);
5772
5773 debug_only(ik->verify();)
5774 }
5775
5776 // For an unsafe anonymous class that is in the unnamed package, move it to its host class's
5777 // package by prepending its host class's package name to its class name and setting
5778 // its _class_name field.
5779 void ClassFileParser::prepend_host_package_name(const InstanceKlass* unsafe_anonymous_host, TRAPS) {
5780 ResourceMark rm(THREAD);
5781 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5782 "Unsafe anonymous class should not be in a package");
5783 const char* host_pkg_name =
5784 ClassLoader::package_from_name(unsafe_anonymous_host->name()->as_C_string(), NULL);
5785
5786 if (host_pkg_name != NULL) {
5787 size_t host_pkg_len = strlen(host_pkg_name);
5788 int class_name_len = _class_name->utf8_length();
5789 char* new_anon_name =
5790 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5791 // Copy host package name and trailing /.
5792 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5793 new_anon_name[host_pkg_len] = '/';
5794 // Append unsafe anonymous class name. The unsafe anonymous class name can contain odd
5795 // characters. So, do a strncpy instead of using sprintf("%s...").
5796 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5797
5798 // Create a symbol and update the anonymous class name.
5799 _class_name = SymbolTable::new_symbol(new_anon_name,
5800 (int)host_pkg_len + 1 + class_name_len,
5801 CHECK);
5802 }
5803 }
5804
5805 // If the host class and the anonymous class are in the same package then do
5806 // nothing. If the anonymous class is in the unnamed package then move it to its
5807 // host's package. If the classes are in different packages then throw an IAE
5808 // exception.
5809 void ClassFileParser::fix_unsafe_anonymous_class_name(TRAPS) {
5810 assert(_unsafe_anonymous_host != NULL, "Expected an unsafe anonymous class");
5811
5812 const jbyte* anon_last_slash = UTF8::strrchr((const jbyte*)_class_name->base(),
5813 _class_name->utf8_length(), '/');
5814 if (anon_last_slash == NULL) { // Unnamed package
5815 prepend_host_package_name(_unsafe_anonymous_host, CHECK);
5816 } else {
5817 if (!_unsafe_anonymous_host->is_same_class_package(_unsafe_anonymous_host->class_loader(), _class_name)) {
5818 ResourceMark rm(THREAD);
5819 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5820 err_msg("Host class %s and anonymous class %s are in different packages",
5821 _unsafe_anonymous_host->name()->as_C_string(), _class_name->as_C_string()));
5822 }
5823 }
5824 }
5825
5826 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5827 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5828 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5829 bool need_verify =
5830 // verifyAll
5831 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5832 // verifyRemote
5833 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5834 return !need_verify;
5835 }
5836
5837 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5838 Symbol* name,
5839 ClassLoaderData* loader_data,
5840 Handle protection_domain,
5841 const InstanceKlass* unsafe_anonymous_host,
5842 GrowableArray<Handle>* cp_patches,
5843 Publicity pub_level,
5844 TRAPS) :
5845 _stream(stream),
5846 _requested_name(name),
5847 _loader_data(loader_data),
5848 _unsafe_anonymous_host(unsafe_anonymous_host),
5849 _cp_patches(cp_patches),
5850 _num_patched_klasses(0),
5851 _max_num_patched_klasses(0),
5852 _orig_cp_size(0),
5853 _first_patched_klass_resolved_index(0),
5854 _super_klass(),
5855 _cp(NULL),
5856 _fields(NULL),
5857 _methods(NULL),
5858 _inner_classes(NULL),
5859 _nest_members(NULL),
5860 _nest_host(0),
5861 _local_interfaces(NULL),
5862 _transitive_interfaces(NULL),
5863 _combined_annotations(NULL),
5864 _annotations(NULL),
5865 _type_annotations(NULL),
5866 _fields_annotations(NULL),
5867 _fields_type_annotations(NULL),
5868 _klass(NULL),
5869 _klass_to_deallocate(NULL),
5870 _parsed_annotations(NULL),
5871 _fac(NULL),
5872 _field_info(NULL),
5873 _method_ordering(NULL),
5874 _all_mirandas(NULL),
5875 _vtable_size(0),
5876 _itable_size(0),
5877 _num_miranda_methods(0),
5878 _rt(REF_NONE),
5879 _protection_domain(protection_domain),
5880 _access_flags(),
5881 _pub_level(pub_level),
5882 _bad_constant_seen(0),
5883 _synthetic_flag(false),
5884 _sde_length(false),
5885 _sde_buffer(NULL),
5886 _sourcefile_index(0),
5887 _generic_signature_index(0),
5888 _major_version(0),
5889 _minor_version(0),
5890 _this_class_index(0),
5891 _super_class_index(0),
5892 _itfs_len(0),
5893 _java_fields_count(0),
5894 _need_verify(false),
5895 _relax_verify(false),
5896 _has_nonstatic_concrete_methods(false),
5897 _declares_nonstatic_concrete_methods(false),
5898 _has_final_method(false),
5899 _has_finalizer(false),
5900 _has_empty_finalizer(false),
5901 _has_vanilla_constructor(false),
5902 _max_bootstrap_specifier_index(-1) {
5903
5904 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5905
5906 assert(THREAD->is_Java_thread(), "invariant");
5907 assert(_loader_data != NULL, "invariant");
5908 assert(stream != NULL, "invariant");
5909 assert(_stream != NULL, "invariant");
5910 assert(_stream->buffer() == _stream->current(), "invariant");
5911 assert(_class_name != NULL, "invariant");
5912 assert(0 == _access_flags.as_int(), "invariant");
5913
5914 // Figure out whether we can skip format checking (matching classic VM behavior)
5915 if (DumpSharedSpaces) {
5916 // verify == true means it's a 'remote' class (i.e., non-boot class)
5917 // Verification decision is based on BytecodeVerificationRemote flag
5918 // for those classes.
5919 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5920 BytecodeVerificationLocal;
5921 }
5922 else {
5923 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5924 stream->need_verify());
5925 }
5926 if (_cp_patches != NULL) {
5927 int len = _cp_patches->length();
5928 for (int i=0; i<len; i++) {
5929 if (has_cp_patch_at(i)) {
5930 Handle patch = cp_patch_at(i);
5931 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5932 // We need to append the names of the patched classes to the end of the constant pool,
5933 // because a patched class may have a Utf8 name that's not already included in the
5934 // original constant pool. These class names are used when patch_constant_pool()
5935 // calls patch_class().
5936 //
5937 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5938 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5939 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5940 _max_num_patched_klasses++;
5941 }
5942 }
5943 }
5944 }
5945
5946 // synch back verification state to stream
5947 stream->set_verify(_need_verify);
5948
5949 // Check if verification needs to be relaxed for this class file
5950 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5951 _relax_verify = relax_format_check_for(_loader_data);
5952
5953 parse_stream(stream, CHECK);
5954
5955 post_process_parsed_stream(stream, _cp, CHECK);
5956 }
5957
5958 void ClassFileParser::clear_class_metadata() {
5959 // metadata created before the instance klass is created. Must be
5960 // deallocated if classfile parsing returns an error.
5961 _cp = NULL;
5962 _fields = NULL;
5963 _methods = NULL;
5964 _inner_classes = NULL;
5965 _nest_members = NULL;
5966 _local_interfaces = NULL;
5967 _combined_annotations = NULL;
5968 _annotations = _type_annotations = NULL;
5969 _fields_annotations = _fields_type_annotations = NULL;
5970 }
5971
5972 // Destructor to clean up
5973 ClassFileParser::~ClassFileParser() {
5974 if (_cp != NULL) {
5975 MetadataFactory::free_metadata(_loader_data, _cp);
5976 }
5977 if (_fields != NULL) {
5978 MetadataFactory::free_array<u2>(_loader_data, _fields);
5979 }
5980
5981 if (_methods != NULL) {
5982 // Free methods
5983 InstanceKlass::deallocate_methods(_loader_data, _methods);
5984 }
5985
5986 // beware of the Universe::empty_blah_array!!
5987 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5988 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5989 }
5990
5991 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
5992 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5993 }
5994
5995 // Free interfaces
5996 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5997 _local_interfaces, _transitive_interfaces);
5998
5999 if (_combined_annotations != NULL) {
6000 // After all annotations arrays have been created, they are installed into the
6001 // Annotations object that will be assigned to the InstanceKlass being created.
6002
6003 // Deallocate the Annotations object and the installed annotations arrays.
6004 _combined_annotations->deallocate_contents(_loader_data);
6005
6006 // If the _combined_annotations pointer is non-NULL,
6007 // then the other annotations fields should have been cleared.
6008 assert(_annotations == NULL, "Should have been cleared");
6009 assert(_type_annotations == NULL, "Should have been cleared");
6010 assert(_fields_annotations == NULL, "Should have been cleared");
6011 assert(_fields_type_annotations == NULL, "Should have been cleared");
6012 } else {
6013 // If the annotations arrays were not installed into the Annotations object,
6014 // then they have to be deallocated explicitly.
6015 MetadataFactory::free_array<u1>(_loader_data, _annotations);
6016 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
6017 Annotations::free_contents(_loader_data, _fields_annotations);
6018 Annotations::free_contents(_loader_data, _fields_type_annotations);
6019 }
6020
6021 clear_class_metadata();
6022 _transitive_interfaces = NULL;
6023
6024 // deallocate the klass if already created. Don't directly deallocate, but add
6025 // to the deallocate list so that the klass is removed from the CLD::_klasses list
6026 // at a safepoint.
6027 if (_klass_to_deallocate != NULL) {
6028 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6029 }
6030 }
6031
6032 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6033 TRAPS) {
6034
6035 assert(stream != NULL, "invariant");
6036 assert(_class_name != NULL, "invariant");
6037
6038 // BEGIN STREAM PARSING
6039 stream->guarantee_more(8, CHECK); // magic, major, minor
6040 // Magic value
6041 const u4 magic = stream->get_u4_fast();
6042 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6043 "Incompatible magic value %u in class file %s",
6044 magic, CHECK);
6045
6046 // Version numbers
6047 _minor_version = stream->get_u2_fast();
6048 _major_version = stream->get_u2_fast();
6049
6050 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
6051 ResourceMark rm;
6052 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
6053 _major_version, _minor_version, _class_name->as_C_string());
6054 Exceptions::fthrow(
6055 THREAD_AND_LOCATION,
6056 vmSymbols::java_lang_UnsupportedClassVersionError(),
6057 "Unsupported major.minor version for dump time %u.%u",
6058 _major_version,
6059 _minor_version);
6060 }
6061
6062 // Check version numbers - we check this even with verifier off
6063 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
6064
6065 stream->guarantee_more(3, CHECK); // length, first cp tag
6066 u2 cp_size = stream->get_u2_fast();
6067
6068 guarantee_property(
6069 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6070 cp_size, CHECK);
6071
6072 _orig_cp_size = cp_size;
6073 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6074 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6075 }
6076 cp_size += _max_num_patched_klasses;
6077
6078 _cp = ConstantPool::allocate(_loader_data,
6079 cp_size,
6080 CHECK);
6081
6082 ConstantPool* const cp = _cp;
6083
6084 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6085
6086 assert(cp_size == (const u2)cp->length(), "invariant");
6087
6088 // ACCESS FLAGS
6089 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6090
6091 // Access flags
6092 jint flags;
6093 // JVM_ACC_MODULE is defined in JDK-9 and later.
6094 if (_major_version >= JAVA_9_VERSION) {
6095 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
6096 } else {
6097 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
6098 }
6099
6100 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6101 // Set abstract bit for old class files for backward compatibility
6102 flags |= JVM_ACC_ABSTRACT;
6103 }
6104
6105 verify_legal_class_modifiers(flags, CHECK);
6106
6107 short bad_constant = class_bad_constant_seen();
6108 if (bad_constant != 0) {
6109 // Do not throw CFE until after the access_flags are checked because if
6110 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6111 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6112 }
6113
6114 _access_flags.set_flags(flags);
6115
6116 // This class and superclass
6117 _this_class_index = stream->get_u2_fast();
6118 check_property(
6119 valid_cp_range(_this_class_index, cp_size) &&
6120 cp->tag_at(_this_class_index).is_unresolved_klass(),
6121 "Invalid this class index %u in constant pool in class file %s",
6122 _this_class_index, CHECK);
6123
6124 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6125 assert(class_name_in_cp != NULL, "class_name can't be null");
6126
6127 // Update _class_name which could be null previously
6128 // to reflect the name in the constant pool
6129 _class_name = class_name_in_cp;
6130
6131 // Don't need to check whether this class name is legal or not.
6132 // It has been checked when constant pool is parsed.
6133 // However, make sure it is not an array type.
6134 if (_need_verify) {
6135 guarantee_property(_class_name->char_at(0) != JVM_SIGNATURE_ARRAY,
6136 "Bad class name in class file %s",
6137 CHECK);
6138 }
6139
6140 // Checks if name in class file matches requested name
6141 if (_requested_name != NULL && _requested_name != _class_name) {
6142 ResourceMark rm(THREAD);
6143 Exceptions::fthrow(
6144 THREAD_AND_LOCATION,
6145 vmSymbols::java_lang_NoClassDefFoundError(),
6146 "%s (wrong name: %s)",
6147 _class_name->as_C_string(),
6148 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6149 );
6150 return;
6151 }
6152
6153 // if this is an anonymous class fix up its name if it's in the unnamed
6154 // package. Otherwise, throw IAE if it is in a different package than
6155 // its host class.
6156 if (_unsafe_anonymous_host != NULL) {
6157 fix_unsafe_anonymous_class_name(CHECK);
6158 }
6159
6160 // Verification prevents us from creating names with dots in them, this
6161 // asserts that that's the case.
6162 assert(is_internal_format(_class_name), "external class name format used internally");
6163
6164 if (!is_internal()) {
6165 LogTarget(Debug, class, preorder) lt;
6166 if (lt.is_enabled()){
6167 ResourceMark rm(THREAD);
6168 LogStream ls(lt);
6169 ls.print("%s", _class_name->as_klass_external_name());
6170 if (stream->source() != NULL) {
6171 ls.print(" source: %s", stream->source());
6172 }
6173 ls.cr();
6174 }
6175
6176 #if INCLUDE_CDS
6177 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6178 if (!ClassLoader::has_jrt_entry()) {
6179 warning("DumpLoadedClassList and CDS are not supported in exploded build");
6180 DumpLoadedClassList = NULL;
6181 } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6182 _unsafe_anonymous_host == NULL) {
6183 // Only dump the classes that can be stored into CDS archive.
6184 // Unsafe anonymous classes such as generated LambdaForm classes are also not included.
6185 oop class_loader = _loader_data->class_loader();
6186 ResourceMark rm(THREAD);
6187 bool skip = false;
6188 if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6189 // For the boot and platform class loaders, skip classes that are not found in the
6190 // java runtime image, such as those found in the --patch-module entries.
6191 // These classes can't be loaded from the archive during runtime.
6192 if (!ClassLoader::is_modules_image(stream->source()) && strncmp(stream->source(), "jrt:", 4) != 0) {
6193 skip = true;
6194 }
6195
6196 if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6197 // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6198 // as they can be loaded from the archive during runtime.
6199 skip = false;
6200 }
6201 }
6202 if (skip) {
6203 tty->print_cr("skip writing class %s from source %s to classlist file",
6204 _class_name->as_C_string(), stream->source());
6205 } else {
6206 classlist_file->print_cr("%s", _class_name->as_C_string());
6207 classlist_file->flush();
6208 }
6209 }
6210 }
6211 #endif
6212 }
6213
6214 // SUPERKLASS
6215 _super_class_index = stream->get_u2_fast();
6216 _super_klass = parse_super_class(cp,
6217 _super_class_index,
6218 _need_verify,
6219 CHECK);
6220
6221 // Interfaces
6222 _itfs_len = stream->get_u2_fast();
6223 parse_interfaces(stream,
6224 _itfs_len,
6225 cp,
6226 &_has_nonstatic_concrete_methods,
6227 CHECK);
6228
6229 assert(_local_interfaces != NULL, "invariant");
6230
6231 // Fields (offsets are filled in later)
6232 _fac = new FieldAllocationCount();
6233 parse_fields(stream,
6234 _access_flags.is_interface(),
6235 _fac,
6236 cp,
6237 cp_size,
6238 &_java_fields_count,
6239 CHECK);
6240
6241 assert(_fields != NULL, "invariant");
6242
6243 // Methods
6244 AccessFlags promoted_flags;
6245 parse_methods(stream,
6246 _access_flags.is_interface(),
6247 &promoted_flags,
6248 &_has_final_method,
6249 &_declares_nonstatic_concrete_methods,
6250 CHECK);
6251
6252 assert(_methods != NULL, "invariant");
6253
6254 // promote flags from parse_methods() to the klass' flags
6255 _access_flags.add_promoted_flags(promoted_flags.as_int());
6256
6257 if (_declares_nonstatic_concrete_methods) {
6258 _has_nonstatic_concrete_methods = true;
6259 }
6260
6261 // Additional attributes/annotations
6262 _parsed_annotations = new ClassAnnotationCollector();
6263 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6264
6265 assert(_inner_classes != NULL, "invariant");
6266
6267 // Finalize the Annotations metadata object,
6268 // now that all annotation arrays have been created.
6269 create_combined_annotations(CHECK);
6270
6271 // Make sure this is the end of class file stream
6272 guarantee_property(stream->at_eos(),
6273 "Extra bytes at the end of class file %s",
6274 CHECK);
6275
6276 // all bytes in stream read and parsed
6277 }
6278
6279 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6280 ConstantPool* cp,
6281 TRAPS) {
6282 assert(stream != NULL, "invariant");
6283 assert(stream->at_eos(), "invariant");
6284 assert(cp != NULL, "invariant");
6285 assert(_loader_data != NULL, "invariant");
6286
6287 if (_class_name == vmSymbols::java_lang_Object()) {
6288 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6289 "java.lang.Object cannot implement an interface in class file %s",
6290 CHECK);
6291 }
6292 // We check super class after class file is parsed and format is checked
6293 if (_super_class_index > 0 && NULL ==_super_klass) {
6294 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6295 if (_access_flags.is_interface()) {
6296 // Before attempting to resolve the superclass, check for class format
6297 // errors not checked yet.
6298 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6299 "Interfaces must have java.lang.Object as superclass in class file %s",
6300 CHECK);
6301 }
6302 Handle loader(THREAD, _loader_data->class_loader());
6303 _super_klass = (const InstanceKlass*)
6304 SystemDictionary::resolve_super_or_fail(_class_name,
6305 super_class_name,
6306 loader,
6307 _protection_domain,
6308 true,
6309 CHECK);
6310 }
6311
6312 if (_super_klass != NULL) {
6313 if (_super_klass->has_nonstatic_concrete_methods()) {
6314 _has_nonstatic_concrete_methods = true;
6315 }
6316
6317 if (_super_klass->is_interface()) {
6318 ResourceMark rm(THREAD);
6319 Exceptions::fthrow(
6320 THREAD_AND_LOCATION,
6321 vmSymbols::java_lang_IncompatibleClassChangeError(),
6322 "class %s has interface %s as super class",
6323 _class_name->as_klass_external_name(),
6324 _super_klass->external_name()
6325 );
6326 return;
6327 }
6328 // Make sure super class is not final
6329 if (_super_klass->is_final()) {
6330 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6331 }
6332 }
6333
6334 // Compute the transitive list of all unique interfaces implemented by this class
6335 _transitive_interfaces =
6336 compute_transitive_interfaces(_super_klass,
6337 _local_interfaces,
6338 _loader_data,
6339 CHECK);
6340
6341 assert(_transitive_interfaces != NULL, "invariant");
6342
6343 // sort methods
6344 _method_ordering = sort_methods(_methods);
6345
6346 _all_mirandas = new GrowableArray<Method*>(20);
6347
6348 Handle loader(THREAD, _loader_data->class_loader());
6349 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6350 &_num_miranda_methods,
6351 _all_mirandas,
6352 _super_klass,
6353 _methods,
6354 _access_flags,
6355 _major_version,
6356 loader,
6357 _class_name,
6358 _local_interfaces,
6359 CHECK);
6360
6361 // Size of Java itable (in words)
6362 _itable_size = _access_flags.is_interface() ? 0 :
6363 klassItable::compute_itable_size(_transitive_interfaces);
6364
6365 assert(_fac != NULL, "invariant");
6366 assert(_parsed_annotations != NULL, "invariant");
6367
6368 _field_info = new FieldLayoutInfo();
6369 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6370
6371 // Compute reference typ
6372 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6373
6374 }
6375
6376 void ClassFileParser::set_klass(InstanceKlass* klass) {
6377
6378 #ifdef ASSERT
6379 if (klass != NULL) {
6380 assert(NULL == _klass, "leaking?");
6381 }
6382 #endif
6383
6384 _klass = klass;
6385 }
6386
6387 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6388
6389 #ifdef ASSERT
6390 if (klass != NULL) {
6391 assert(NULL == _klass_to_deallocate, "leaking?");
6392 }
6393 #endif
6394
6395 _klass_to_deallocate = klass;
6396 }
6397
6398 // Caller responsible for ResourceMark
6399 // clone stream with rewound position
6400 const ClassFileStream* ClassFileParser::clone_stream() const {
6401 assert(_stream != NULL, "invariant");
6402
6403 return _stream->clone();
6404 }
6405 // ----------------------------------------------------------------------------
6406 // debugging
6407
6408 #ifdef ASSERT
6409
6410 // return true if class_name contains no '.' (internal format is '/')
6411 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6412 if (class_name != NULL) {
6413 ResourceMark rm;
6414 char* name = class_name->as_C_string();
6415 return strchr(name, '.') == NULL;
6416 } else {
6417 return true;
6418 }
6419 }
6420
6421 #endif