1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24 #include "precompiled.hpp"
25 #include "jvm.h"
26 #include "aot/aotLoader.hpp"
27 #include "classfile/classFileParser.hpp"
28 #include "classfile/classFileStream.hpp"
29 #include "classfile/classLoader.hpp"
30 #include "classfile/classLoaderData.inline.hpp"
31 #include "classfile/defaultMethods.hpp"
32 #include "classfile/dictionary.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/moduleEntry.hpp"
35 #include "classfile/packageEntry.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/verificationType.hpp"
39 #include "classfile/verifier.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "logging/log.hpp"
42 #include "logging/logStream.hpp"
43 #include "memory/allocation.hpp"
44 #include "memory/metadataFactory.hpp"
45 #include "memory/oopFactory.hpp"
46 #include "memory/resourceArea.hpp"
47 #include "memory/universe.hpp"
48 #include "oops/annotations.hpp"
49 #include "oops/constantPool.inline.hpp"
50 #include "oops/fieldStreams.inline.hpp"
51 #include "oops/instanceKlass.hpp"
52 #include "oops/instanceMirrorKlass.hpp"
53 #include "oops/klass.inline.hpp"
54 #include "oops/klassVtable.hpp"
55 #include "oops/metadata.hpp"
56 #include "oops/method.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/symbol.hpp"
59 #include "prims/jvmtiExport.hpp"
60 #include "prims/jvmtiThreadState.hpp"
61 #include "runtime/arguments.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/javaCalls.hpp"
64 #include "runtime/os.hpp"
65 #include "runtime/perfData.hpp"
66 #include "runtime/reflection.hpp"
67 #include "runtime/safepointVerifiers.hpp"
68 #include "runtime/signature.hpp"
69 #include "runtime/timer.hpp"
70 #include "services/classLoadingService.hpp"
71 #include "services/threadService.hpp"
72 #include "utilities/align.hpp"
73 #include "utilities/bitMap.inline.hpp"
74 #include "utilities/copy.hpp"
75 #include "utilities/exceptions.hpp"
76 #include "utilities/globalDefinitions.hpp"
77 #include "utilities/growableArray.hpp"
78 #include "utilities/macros.hpp"
79 #include "utilities/ostream.hpp"
80 #include "utilities/resourceHash.hpp"
81 #include "utilities/utf8.hpp"
82
83 #if INCLUDE_CDS
84 #include "classfile/systemDictionaryShared.hpp"
85 #endif
86 #if INCLUDE_JFR
87 #include "jfr/support/jfrTraceIdExtension.hpp"
88 #endif
89
90 // We generally try to create the oops directly when parsing, rather than
91 // allocating temporary data structures and copying the bytes twice. A
92 // temporary area is only needed when parsing utf8 entries in the constant
93 // pool and when parsing line number tables.
94
95 // We add assert in debug mode when class format is not checked.
96
97 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
98 #define JAVA_MIN_SUPPORTED_VERSION 45
99 #define JAVA_PREVIEW_MINOR_VERSION 65535
100
101 // Used for two backward compatibility reasons:
102 // - to check for new additions to the class file format in JDK1.5
103 // - to check for bug fixes in the format checker in JDK1.5
104 #define JAVA_1_5_VERSION 49
105
106 // Used for backward compatibility reasons:
107 // - to check for javac bug fixes that happened after 1.5
108 // - also used as the max version when running in jdk6
109 #define JAVA_6_VERSION 50
110
111 // Used for backward compatibility reasons:
112 // - to disallow argument and require ACC_STATIC for <clinit> methods
113 #define JAVA_7_VERSION 51
114
115 // Extension method support.
116 #define JAVA_8_VERSION 52
117
118 #define JAVA_9_VERSION 53
119
120 #define JAVA_10_VERSION 54
121
122 #define JAVA_11_VERSION 55
123
124 #define JAVA_12_VERSION 56
125
126 #define JAVA_13_VERSION 57
127
128 #define JAVA_14_VERSION 58
129
130 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
131 assert((bad_constant == JVM_CONSTANT_Module ||
132 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
133 "Unexpected bad constant pool entry");
134 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
135 }
136
137 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
138 ConstantPool* cp,
139 const int length,
140 TRAPS) {
141 assert(stream != NULL, "invariant");
142 assert(cp != NULL, "invariant");
143
144 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
145 // this function (_current can be allocated in a register, with scalar
146 // replacement of aggregates). The _current pointer is copied back to
147 // stream() when this function returns. DON'T call another method within
148 // this method that uses stream().
149 const ClassFileStream cfs1 = *stream;
150 const ClassFileStream* const cfs = &cfs1;
151
152 assert(cfs->allocated_on_stack(), "should be local");
153 debug_only(const u1* const old_current = stream->current();)
154
155 // Used for batching symbol allocations.
156 const char* names[SymbolTable::symbol_alloc_batch_size];
157 int lengths[SymbolTable::symbol_alloc_batch_size];
158 int indices[SymbolTable::symbol_alloc_batch_size];
159 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
160 int names_count = 0;
161
162 // parsing Index 0 is unused
163 for (int index = 1; index < length; index++) {
164 // Each of the following case guarantees one more byte in the stream
165 // for the following tag or the access_flags following constant pool,
166 // so we don't need bounds-check for reading tag.
167 const u1 tag = cfs->get_u1_fast();
168 switch (tag) {
169 case JVM_CONSTANT_Class : {
170 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
171 const u2 name_index = cfs->get_u2_fast();
172 cp->klass_index_at_put(index, name_index);
173 break;
174 }
175 case JVM_CONSTANT_Fieldref: {
176 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
177 const u2 class_index = cfs->get_u2_fast();
178 const u2 name_and_type_index = cfs->get_u2_fast();
179 cp->field_at_put(index, class_index, name_and_type_index);
180 break;
181 }
182 case JVM_CONSTANT_Methodref: {
183 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
184 const u2 class_index = cfs->get_u2_fast();
185 const u2 name_and_type_index = cfs->get_u2_fast();
186 cp->method_at_put(index, class_index, name_and_type_index);
187 break;
188 }
189 case JVM_CONSTANT_InterfaceMethodref: {
190 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
191 const u2 class_index = cfs->get_u2_fast();
192 const u2 name_and_type_index = cfs->get_u2_fast();
193 cp->interface_method_at_put(index, class_index, name_and_type_index);
194 break;
195 }
196 case JVM_CONSTANT_String : {
197 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
198 const u2 string_index = cfs->get_u2_fast();
199 cp->string_index_at_put(index, string_index);
200 break;
201 }
202 case JVM_CONSTANT_MethodHandle :
203 case JVM_CONSTANT_MethodType: {
204 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
205 classfile_parse_error(
206 "Class file version does not support constant tag %u in class file %s",
207 tag, CHECK);
208 }
209 if (tag == JVM_CONSTANT_MethodHandle) {
210 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
211 const u1 ref_kind = cfs->get_u1_fast();
212 const u2 method_index = cfs->get_u2_fast();
213 cp->method_handle_index_at_put(index, ref_kind, method_index);
214 }
215 else if (tag == JVM_CONSTANT_MethodType) {
216 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
217 const u2 signature_index = cfs->get_u2_fast();
218 cp->method_type_index_at_put(index, signature_index);
219 }
220 else {
221 ShouldNotReachHere();
222 }
223 break;
224 }
225 case JVM_CONSTANT_Dynamic : {
226 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
227 classfile_parse_error(
228 "Class file version does not support constant tag %u in class file %s",
229 tag, CHECK);
230 }
231 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
232 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
233 const u2 name_and_type_index = cfs->get_u2_fast();
234 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
235 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
236 }
237 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
238 break;
239 }
240 case JVM_CONSTANT_InvokeDynamic : {
241 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
242 classfile_parse_error(
243 "Class file version does not support constant tag %u in class file %s",
244 tag, CHECK);
245 }
246 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
247 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
248 const u2 name_and_type_index = cfs->get_u2_fast();
249 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
250 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
251 }
252 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
253 break;
254 }
255 case JVM_CONSTANT_Integer: {
256 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
257 const u4 bytes = cfs->get_u4_fast();
258 cp->int_at_put(index, (jint)bytes);
259 break;
260 }
261 case JVM_CONSTANT_Float: {
262 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
263 const u4 bytes = cfs->get_u4_fast();
264 cp->float_at_put(index, *(jfloat*)&bytes);
265 break;
266 }
267 case JVM_CONSTANT_Long: {
268 // A mangled type might cause you to overrun allocated memory
269 guarantee_property(index + 1 < length,
270 "Invalid constant pool entry %u in class file %s",
271 index,
272 CHECK);
273 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
274 const u8 bytes = cfs->get_u8_fast();
275 cp->long_at_put(index, bytes);
276 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
277 break;
278 }
279 case JVM_CONSTANT_Double: {
280 // A mangled type might cause you to overrun allocated memory
281 guarantee_property(index+1 < length,
282 "Invalid constant pool entry %u in class file %s",
283 index,
284 CHECK);
285 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
286 const u8 bytes = cfs->get_u8_fast();
287 cp->double_at_put(index, *(jdouble*)&bytes);
288 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
289 break;
290 }
291 case JVM_CONSTANT_NameAndType: {
292 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
293 const u2 name_index = cfs->get_u2_fast();
294 const u2 signature_index = cfs->get_u2_fast();
295 cp->name_and_type_at_put(index, name_index, signature_index);
296 break;
297 }
298 case JVM_CONSTANT_Utf8 : {
299 cfs->guarantee_more(2, CHECK); // utf8_length
300 u2 utf8_length = cfs->get_u2_fast();
301 const u1* utf8_buffer = cfs->current();
302 assert(utf8_buffer != NULL, "null utf8 buffer");
303 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
304 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
305 cfs->skip_u1_fast(utf8_length);
306
307 // Before storing the symbol, make sure it's legal
308 if (_need_verify) {
309 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
310 }
311
312 if (has_cp_patch_at(index)) {
313 Handle patch = clear_cp_patch_at(index);
314 guarantee_property(java_lang_String::is_instance(patch()),
315 "Illegal utf8 patch at %d in class file %s",
316 index,
317 CHECK);
318 const char* const str = java_lang_String::as_utf8_string(patch());
319 // (could use java_lang_String::as_symbol instead, but might as well batch them)
320 utf8_buffer = (const u1*) str;
321 utf8_length = (u2) strlen(str);
322 }
323
324 unsigned int hash;
325 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
326 utf8_length,
327 hash);
328 if (result == NULL) {
329 names[names_count] = (const char*)utf8_buffer;
330 lengths[names_count] = utf8_length;
331 indices[names_count] = index;
332 hashValues[names_count++] = hash;
333 if (names_count == SymbolTable::symbol_alloc_batch_size) {
334 SymbolTable::new_symbols(_loader_data,
335 constantPoolHandle(THREAD, cp),
336 names_count,
337 names,
338 lengths,
339 indices,
340 hashValues);
341 names_count = 0;
342 }
343 } else {
344 cp->symbol_at_put(index, result);
345 }
346 break;
347 }
348 case JVM_CONSTANT_Module:
349 case JVM_CONSTANT_Package: {
350 // Record that an error occurred in these two cases but keep parsing so
351 // that ACC_Module can be checked for in the access_flags. Need to
352 // throw NoClassDefFoundError in that case.
353 if (_major_version >= JAVA_9_VERSION) {
354 cfs->guarantee_more(3, CHECK);
355 cfs->get_u2_fast();
356 set_class_bad_constant_seen(tag);
357 break;
358 }
359 }
360 default: {
361 classfile_parse_error("Unknown constant tag %u in class file %s",
362 tag,
363 CHECK);
364 break;
365 }
366 } // end of switch(tag)
367 } // end of for
368
369 // Allocate the remaining symbols
370 if (names_count > 0) {
371 SymbolTable::new_symbols(_loader_data,
372 constantPoolHandle(THREAD, cp),
373 names_count,
374 names,
375 lengths,
376 indices,
377 hashValues);
378 }
379
380 // Copy _current pointer of local copy back to stream.
381 assert(stream->current() == old_current, "non-exclusive use of stream");
382 stream->set_current(cfs1.current());
383
384 }
385
386 static inline bool valid_cp_range(int index, int length) {
387 return (index > 0 && index < length);
388 }
389
390 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
391 assert(cp != NULL, "invariant");
392 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
393 return cp->symbol_at(index);
394 }
395 return NULL;
396 }
397
398 #ifdef ASSERT
399 PRAGMA_DIAG_PUSH
400 PRAGMA_FORMAT_NONLITERAL_IGNORED
401 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
402 ResourceMark rm(THREAD);
403 fatal(msg, _class_name->as_C_string());
404 }
405
406 void ClassFileParser::report_assert_property_failure(const char* msg,
407 int index,
408 TRAPS) const {
409 ResourceMark rm(THREAD);
410 fatal(msg, index, _class_name->as_C_string());
411 }
412 PRAGMA_DIAG_POP
413 #endif
414
415 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
416 ConstantPool* const cp,
417 const int length,
418 TRAPS) {
419 assert(cp != NULL, "invariant");
420 assert(stream != NULL, "invariant");
421
422 // parsing constant pool entries
423 parse_constant_pool_entries(stream, cp, length, CHECK);
424 if (class_bad_constant_seen() != 0) {
425 // a bad CP entry has been detected previously so stop parsing and just return.
426 return;
427 }
428
429 int index = 1; // declared outside of loops for portability
430 int num_klasses = 0;
431
432 // first verification pass - validate cross references
433 // and fixup class and string constants
434 for (index = 1; index < length; index++) { // Index 0 is unused
435 const jbyte tag = cp->tag_at(index).value();
436 switch (tag) {
437 case JVM_CONSTANT_Class: {
438 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
439 break;
440 }
441 case JVM_CONSTANT_Fieldref:
442 // fall through
443 case JVM_CONSTANT_Methodref:
444 // fall through
445 case JVM_CONSTANT_InterfaceMethodref: {
446 if (!_need_verify) break;
447 const int klass_ref_index = cp->klass_ref_index_at(index);
448 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
449 check_property(valid_klass_reference_at(klass_ref_index),
450 "Invalid constant pool index %u in class file %s",
451 klass_ref_index, CHECK);
452 check_property(valid_cp_range(name_and_type_ref_index, length) &&
453 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
454 "Invalid constant pool index %u in class file %s",
455 name_and_type_ref_index, CHECK);
456 break;
457 }
458 case JVM_CONSTANT_String: {
459 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
460 break;
461 }
462 case JVM_CONSTANT_Integer:
463 break;
464 case JVM_CONSTANT_Float:
465 break;
466 case JVM_CONSTANT_Long:
467 case JVM_CONSTANT_Double: {
468 index++;
469 check_property(
470 (index < length && cp->tag_at(index).is_invalid()),
471 "Improper constant pool long/double index %u in class file %s",
472 index, CHECK);
473 break;
474 }
475 case JVM_CONSTANT_NameAndType: {
476 if (!_need_verify) break;
477 const int name_ref_index = cp->name_ref_index_at(index);
478 const int signature_ref_index = cp->signature_ref_index_at(index);
479 check_property(valid_symbol_at(name_ref_index),
480 "Invalid constant pool index %u in class file %s",
481 name_ref_index, CHECK);
482 check_property(valid_symbol_at(signature_ref_index),
483 "Invalid constant pool index %u in class file %s",
484 signature_ref_index, CHECK);
485 break;
486 }
487 case JVM_CONSTANT_Utf8:
488 break;
489 case JVM_CONSTANT_UnresolvedClass: // fall-through
490 case JVM_CONSTANT_UnresolvedClassInError: {
491 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
492 break;
493 }
494 case JVM_CONSTANT_ClassIndex: {
495 const int class_index = cp->klass_index_at(index);
496 check_property(valid_symbol_at(class_index),
497 "Invalid constant pool index %u in class file %s",
498 class_index, CHECK);
499 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
500 break;
501 }
502 case JVM_CONSTANT_StringIndex: {
503 const int string_index = cp->string_index_at(index);
504 check_property(valid_symbol_at(string_index),
505 "Invalid constant pool index %u in class file %s",
506 string_index, CHECK);
507 Symbol* const sym = cp->symbol_at(string_index);
508 cp->unresolved_string_at_put(index, sym);
509 break;
510 }
511 case JVM_CONSTANT_MethodHandle: {
512 const int ref_index = cp->method_handle_index_at(index);
513 check_property(valid_cp_range(ref_index, length),
514 "Invalid constant pool index %u in class file %s",
515 ref_index, CHECK);
516 const constantTag tag = cp->tag_at(ref_index);
517 const int ref_kind = cp->method_handle_ref_kind_at(index);
518
519 switch (ref_kind) {
520 case JVM_REF_getField:
521 case JVM_REF_getStatic:
522 case JVM_REF_putField:
523 case JVM_REF_putStatic: {
524 check_property(
525 tag.is_field(),
526 "Invalid constant pool index %u in class file %s (not a field)",
527 ref_index, CHECK);
528 break;
529 }
530 case JVM_REF_invokeVirtual:
531 case JVM_REF_newInvokeSpecial: {
532 check_property(
533 tag.is_method(),
534 "Invalid constant pool index %u in class file %s (not a method)",
535 ref_index, CHECK);
536 break;
537 }
538 case JVM_REF_invokeStatic:
539 case JVM_REF_invokeSpecial: {
540 check_property(
541 tag.is_method() ||
542 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
543 "Invalid constant pool index %u in class file %s (not a method)",
544 ref_index, CHECK);
545 break;
546 }
547 case JVM_REF_invokeInterface: {
548 check_property(
549 tag.is_interface_method(),
550 "Invalid constant pool index %u in class file %s (not an interface method)",
551 ref_index, CHECK);
552 break;
553 }
554 default: {
555 classfile_parse_error(
556 "Bad method handle kind at constant pool index %u in class file %s",
557 index, CHECK);
558 }
559 } // switch(refkind)
560 // Keep the ref_index unchanged. It will be indirected at link-time.
561 break;
562 } // case MethodHandle
563 case JVM_CONSTANT_MethodType: {
564 const int ref_index = cp->method_type_index_at(index);
565 check_property(valid_symbol_at(ref_index),
566 "Invalid constant pool index %u in class file %s",
567 ref_index, CHECK);
568 break;
569 }
570 case JVM_CONSTANT_Dynamic: {
571 const int name_and_type_ref_index =
572 cp->bootstrap_name_and_type_ref_index_at(index);
573
574 check_property(valid_cp_range(name_and_type_ref_index, length) &&
575 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
576 "Invalid constant pool index %u in class file %s",
577 name_and_type_ref_index, CHECK);
578 // bootstrap specifier index must be checked later,
579 // when BootstrapMethods attr is available
580
581 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
582 cp->set_has_dynamic_constant();
583 break;
584 }
585 case JVM_CONSTANT_InvokeDynamic: {
586 const int name_and_type_ref_index =
587 cp->bootstrap_name_and_type_ref_index_at(index);
588
589 check_property(valid_cp_range(name_and_type_ref_index, length) &&
590 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
591 "Invalid constant pool index %u in class file %s",
592 name_and_type_ref_index, CHECK);
593 // bootstrap specifier index must be checked later,
594 // when BootstrapMethods attr is available
595 break;
596 }
597 default: {
598 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
599 ShouldNotReachHere();
600 break;
601 }
602 } // switch(tag)
603 } // end of for
604
605 _first_patched_klass_resolved_index = num_klasses;
606 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
607
608 if (_cp_patches != NULL) {
609 // need to treat this_class specially...
610
611 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
612 // for now. These will be replaced with actual names of the patched classes in patch_class().
613 Symbol* s = vmSymbols::star_name();
614 for (int n=_orig_cp_size; n<cp->length(); n++) {
615 cp->symbol_at_put(n, s);
616 }
617
618 int this_class_index;
619 {
620 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
621 const u1* const mark = stream->current();
622 stream->skip_u2_fast(1); // skip flags
623 this_class_index = stream->get_u2_fast();
624 stream->set_current(mark); // revert to mark
625 }
626
627 for (index = 1; index < length; index++) { // Index 0 is unused
628 if (has_cp_patch_at(index)) {
629 guarantee_property(index != this_class_index,
630 "Illegal constant pool patch to self at %d in class file %s",
631 index, CHECK);
632 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
633 }
634 }
635 }
636
637 if (!_need_verify) {
638 return;
639 }
640
641 // second verification pass - checks the strings are of the right format.
642 // but not yet to the other entries
643 for (index = 1; index < length; index++) {
644 const jbyte tag = cp->tag_at(index).value();
645 switch (tag) {
646 case JVM_CONSTANT_UnresolvedClass: {
647 const Symbol* const class_name = cp->klass_name_at(index);
648 // check the name, even if _cp_patches will overwrite it
649 verify_legal_class_name(class_name, CHECK);
650 break;
651 }
652 case JVM_CONSTANT_NameAndType: {
653 if (_need_verify) {
654 const int sig_index = cp->signature_ref_index_at(index);
655 const int name_index = cp->name_ref_index_at(index);
656 const Symbol* const name = cp->symbol_at(name_index);
657 const Symbol* const sig = cp->symbol_at(sig_index);
658 guarantee_property(sig->utf8_length() != 0,
659 "Illegal zero length constant pool entry at %d in class %s",
660 sig_index, CHECK);
661 guarantee_property(name->utf8_length() != 0,
662 "Illegal zero length constant pool entry at %d in class %s",
663 name_index, CHECK);
664
665 if (sig->char_at(0) == JVM_SIGNATURE_FUNC) {
666 // Format check method name and signature
667 verify_legal_method_name(name, CHECK);
668 verify_legal_method_signature(name, sig, CHECK);
669 } else {
670 // Format check field name and signature
671 verify_legal_field_name(name, CHECK);
672 verify_legal_field_signature(name, sig, CHECK);
673 }
674 }
675 break;
676 }
677 case JVM_CONSTANT_Dynamic: {
678 const int name_and_type_ref_index =
679 cp->name_and_type_ref_index_at(index);
680 // already verified to be utf8
681 const int name_ref_index =
682 cp->name_ref_index_at(name_and_type_ref_index);
683 // already verified to be utf8
684 const int signature_ref_index =
685 cp->signature_ref_index_at(name_and_type_ref_index);
686 const Symbol* const name = cp->symbol_at(name_ref_index);
687 const Symbol* const signature = cp->symbol_at(signature_ref_index);
688 if (_need_verify) {
689 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
690 // Need only to be sure signature is non-zero length and the right type.
691 if (signature->utf8_length() == 0 ||
692 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
693 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
694 }
695 }
696 break;
697 }
698 case JVM_CONSTANT_InvokeDynamic:
699 case JVM_CONSTANT_Fieldref:
700 case JVM_CONSTANT_Methodref:
701 case JVM_CONSTANT_InterfaceMethodref: {
702 const int name_and_type_ref_index =
703 cp->name_and_type_ref_index_at(index);
704 // already verified to be utf8
705 const int name_ref_index =
706 cp->name_ref_index_at(name_and_type_ref_index);
707 // already verified to be utf8
708 const int signature_ref_index =
709 cp->signature_ref_index_at(name_and_type_ref_index);
710 const Symbol* const name = cp->symbol_at(name_ref_index);
711 const Symbol* const signature = cp->symbol_at(signature_ref_index);
712 if (tag == JVM_CONSTANT_Fieldref) {
713 if (_need_verify) {
714 // Field name and signature are verified above, when iterating NameAndType_info.
715 // Need only to be sure signature is non-zero length and the right type.
716 if (signature->utf8_length() == 0 ||
717 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
718 throwIllegalSignature("Field", name, signature, CHECK);
719 }
720 }
721 } else {
722 if (_need_verify) {
723 // Method name and signature are verified above, when iterating NameAndType_info.
724 // Need only to be sure signature is non-zero length and the right type.
725 if (signature->utf8_length() == 0 ||
726 signature->char_at(0) != JVM_SIGNATURE_FUNC) {
727 throwIllegalSignature("Method", name, signature, CHECK);
728 }
729 }
730 // 4509014: If a class method name begins with '<', it must be "<init>"
731 const unsigned int name_len = name->utf8_length();
732 if (tag == JVM_CONSTANT_Methodref &&
733 name_len != 0 &&
734 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
735 name != vmSymbols::object_initializer_name()) {
736 classfile_parse_error(
737 "Bad method name at constant pool index %u in class file %s",
738 name_ref_index, CHECK);
739 }
740 }
741 break;
742 }
743 case JVM_CONSTANT_MethodHandle: {
744 const int ref_index = cp->method_handle_index_at(index);
745 const int ref_kind = cp->method_handle_ref_kind_at(index);
746 switch (ref_kind) {
747 case JVM_REF_invokeVirtual:
748 case JVM_REF_invokeStatic:
749 case JVM_REF_invokeSpecial:
750 case JVM_REF_newInvokeSpecial: {
751 const int name_and_type_ref_index =
752 cp->name_and_type_ref_index_at(ref_index);
753 const int name_ref_index =
754 cp->name_ref_index_at(name_and_type_ref_index);
755 const Symbol* const name = cp->symbol_at(name_ref_index);
756 if (ref_kind == JVM_REF_newInvokeSpecial) {
757 if (name != vmSymbols::object_initializer_name()) {
758 classfile_parse_error(
759 "Bad constructor name at constant pool index %u in class file %s",
760 name_ref_index, CHECK);
761 }
762 } else {
763 if (name == vmSymbols::object_initializer_name()) {
764 classfile_parse_error(
765 "Bad method name at constant pool index %u in class file %s",
766 name_ref_index, CHECK);
767 }
768 }
769 break;
770 }
771 // Other ref_kinds are already fully checked in previous pass.
772 } // switch(ref_kind)
773 break;
774 }
775 case JVM_CONSTANT_MethodType: {
776 const Symbol* const no_name = vmSymbols::type_name(); // place holder
777 const Symbol* const signature = cp->method_type_signature_at(index);
778 verify_legal_method_signature(no_name, signature, CHECK);
779 break;
780 }
781 case JVM_CONSTANT_Utf8: {
782 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
783 }
784 } // switch(tag)
785 } // end of for
786 }
787
788 Handle ClassFileParser::clear_cp_patch_at(int index) {
789 Handle patch = cp_patch_at(index);
790 _cp_patches->at_put(index, Handle());
791 assert(!has_cp_patch_at(index), "");
792 return patch;
793 }
794
795 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
796 int name_index = _orig_cp_size + _num_patched_klasses;
797 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
798
799 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
800 _num_patched_klasses ++;
801 }
802
803 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
804 int index,
805 Handle patch,
806 TRAPS) {
807 assert(cp != NULL, "invariant");
808
809 BasicType patch_type = T_VOID;
810
811 switch (cp->tag_at(index).value()) {
812
813 case JVM_CONSTANT_UnresolvedClass: {
814 // Patching a class means pre-resolving it.
815 // The name in the constant pool is ignored.
816 if (java_lang_Class::is_instance(patch())) {
817 guarantee_property(!java_lang_Class::is_primitive(patch()),
818 "Illegal class patch at %d in class file %s",
819 index, CHECK);
820 Klass* k = java_lang_Class::as_Klass(patch());
821 patch_class(cp, index, k, k->name());
822 } else {
823 guarantee_property(java_lang_String::is_instance(patch()),
824 "Illegal class patch at %d in class file %s",
825 index, CHECK);
826 Symbol* const name = java_lang_String::as_symbol(patch());
827 patch_class(cp, index, NULL, name);
828 }
829 break;
830 }
831
832 case JVM_CONSTANT_String: {
833 // skip this patch and don't clear it. Needs the oop array for resolved
834 // references to be created first.
835 return;
836 }
837 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
838 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
839 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
840 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
841 patch_prim:
842 {
843 jvalue value;
844 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
845 guarantee_property(value_type == patch_type,
846 "Illegal primitive patch at %d in class file %s",
847 index, CHECK);
848 switch (value_type) {
849 case T_INT: cp->int_at_put(index, value.i); break;
850 case T_FLOAT: cp->float_at_put(index, value.f); break;
851 case T_LONG: cp->long_at_put(index, value.j); break;
852 case T_DOUBLE: cp->double_at_put(index, value.d); break;
853 default: assert(false, "");
854 }
855 } // end patch_prim label
856 break;
857
858 default: {
859 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
860 guarantee_property(!has_cp_patch_at(index),
861 "Illegal unexpected patch at %d in class file %s",
862 index, CHECK);
863 return;
864 }
865 } // end of switch(tag)
866
867 // On fall-through, mark the patch as used.
868 clear_cp_patch_at(index);
869 }
870 class NameSigHash: public ResourceObj {
871 public:
872 const Symbol* _name; // name
873 const Symbol* _sig; // signature
874 NameSigHash* _next; // Next entry in hash table
875 };
876
877 static const int HASH_ROW_SIZE = 256;
878
879 static unsigned int hash(const Symbol* name, const Symbol* sig) {
880 unsigned int raw_hash = 0;
881 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
882 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
883
884 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
885 }
886
887
888 static void initialize_hashtable(NameSigHash** table) {
889 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
890 }
891 // Return false if the name/sig combination is found in table.
892 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
893 // The old format checker uses heap sort to find duplicates.
894 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
895 // of table since we don't expect Symbol*'s to move.
896 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
897 assert(name != NULL, "name in constant pool is NULL");
898
899 // First lookup for duplicates
900 int index = hash(name, sig);
901 NameSigHash* entry = table[index];
902 while (entry != NULL) {
903 if (entry->_name == name && entry->_sig == sig) {
904 return false;
905 }
906 entry = entry->_next;
907 }
908
909 // No duplicate is found, allocate a new entry and fill it.
910 entry = new NameSigHash();
911 entry->_name = name;
912 entry->_sig = sig;
913
914 // Insert into hash table
915 entry->_next = table[index];
916 table[index] = entry;
917
918 return true;
919 }
920
921 // Side-effects: populates the _local_interfaces field
922 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
923 const int itfs_len,
924 ConstantPool* const cp,
925 bool* const has_nonstatic_concrete_methods,
926 TRAPS) {
927 assert(stream != NULL, "invariant");
928 assert(cp != NULL, "invariant");
929 assert(has_nonstatic_concrete_methods != NULL, "invariant");
930
931 if (itfs_len == 0) {
932 _local_interfaces = Universe::the_empty_instance_klass_array();
933 } else {
934 assert(itfs_len > 0, "only called for len>0");
935 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
936
937 int index;
938 for (index = 0; index < itfs_len; index++) {
939 const u2 interface_index = stream->get_u2(CHECK);
940 Klass* interf;
941 check_property(
942 valid_klass_reference_at(interface_index),
943 "Interface name has bad constant pool index %u in class file %s",
944 interface_index, CHECK);
945 if (cp->tag_at(interface_index).is_klass()) {
946 interf = cp->resolved_klass_at(interface_index);
947 } else {
948 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
949
950 // Don't need to check legal name because it's checked when parsing constant pool.
951 // But need to make sure it's not an array type.
952 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
953 "Bad interface name in class file %s", CHECK);
954
955 // Call resolve_super so classcircularity is checked
956 interf = SystemDictionary::resolve_super_or_fail(
957 _class_name,
958 unresolved_klass,
959 Handle(THREAD, _loader_data->class_loader()),
960 _protection_domain,
961 false,
962 CHECK);
963 }
964
965 if (!interf->is_interface()) {
966 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
967 err_msg("class %s can not implement %s, because it is not an interface (%s)",
968 _class_name->as_klass_external_name(),
969 interf->external_name(),
970 interf->class_in_module_of_loader()));
971 }
972
973 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
974 *has_nonstatic_concrete_methods = true;
975 }
976 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
977 }
978
979 if (!_need_verify || itfs_len <= 1) {
980 return;
981 }
982
983 // Check if there's any duplicates in interfaces
984 ResourceMark rm(THREAD);
985 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
986 NameSigHash*,
987 HASH_ROW_SIZE);
988 initialize_hashtable(interface_names);
989 bool dup = false;
990 const Symbol* name = NULL;
991 {
992 debug_only(NoSafepointVerifier nsv;)
993 for (index = 0; index < itfs_len; index++) {
994 const InstanceKlass* const k = _local_interfaces->at(index);
995 name = k->name();
996 // If no duplicates, add (name, NULL) in hashtable interface_names.
997 if (!put_after_lookup(name, NULL, interface_names)) {
998 dup = true;
999 break;
1000 }
1001 }
1002 }
1003 if (dup) {
1004 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
1005 name->as_C_string(), CHECK);
1006 }
1007 }
1008 }
1009
1010 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
1011 int constantvalue_index,
1012 int signature_index,
1013 TRAPS) const {
1014 // Make sure the constant pool entry is of a type appropriate to this field
1015 guarantee_property(
1016 (constantvalue_index > 0 &&
1017 constantvalue_index < cp->length()),
1018 "Bad initial value index %u in ConstantValue attribute in class file %s",
1019 constantvalue_index, CHECK);
1020
1021 const constantTag value_type = cp->tag_at(constantvalue_index);
1022 switch(cp->basic_type_for_signature_at(signature_index)) {
1023 case T_LONG: {
1024 guarantee_property(value_type.is_long(),
1025 "Inconsistent constant value type in class file %s",
1026 CHECK);
1027 break;
1028 }
1029 case T_FLOAT: {
1030 guarantee_property(value_type.is_float(),
1031 "Inconsistent constant value type in class file %s",
1032 CHECK);
1033 break;
1034 }
1035 case T_DOUBLE: {
1036 guarantee_property(value_type.is_double(),
1037 "Inconsistent constant value type in class file %s",
1038 CHECK);
1039 break;
1040 }
1041 case T_BYTE:
1042 case T_CHAR:
1043 case T_SHORT:
1044 case T_BOOLEAN:
1045 case T_INT: {
1046 guarantee_property(value_type.is_int(),
1047 "Inconsistent constant value type in class file %s",
1048 CHECK);
1049 break;
1050 }
1051 case T_OBJECT: {
1052 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1053 && value_type.is_string()),
1054 "Bad string initial value in class file %s",
1055 CHECK);
1056 break;
1057 }
1058 default: {
1059 classfile_parse_error("Unable to set initial value %u in class file %s",
1060 constantvalue_index,
1061 CHECK);
1062 }
1063 }
1064 }
1065
1066 class AnnotationCollector : public ResourceObj{
1067 public:
1068 enum Location { _in_field, _in_method, _in_class };
1069 enum ID {
1070 _unknown = 0,
1071 _method_CallerSensitive,
1072 _method_ForceInline,
1073 _method_DontInline,
1074 _method_InjectedProfile,
1075 _method_LambdaForm_Compiled,
1076 _method_Hidden,
1077 _method_HotSpotIntrinsicCandidate,
1078 _jdk_internal_vm_annotation_Contended,
1079 _field_Stable,
1080 _jdk_internal_vm_annotation_ReservedStackAccess,
1081 _annotation_LIMIT
1082 };
1083 const Location _location;
1084 int _annotations_present;
1085 u2 _contended_group;
1086
1087 AnnotationCollector(Location location)
1088 : _location(location), _annotations_present(0)
1089 {
1090 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1091 }
1092 // If this annotation name has an ID, report it (or _none).
1093 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, const bool can_access_vm_annotations);
1094 // Set the annotation name:
1095 void set_annotation(ID id) {
1096 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1097 _annotations_present |= nth_bit((int)id);
1098 }
1099
1100 void remove_annotation(ID id) {
1101 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1102 _annotations_present &= ~nth_bit((int)id);
1103 }
1104
1105 // Report if the annotation is present.
1106 bool has_any_annotations() const { return _annotations_present != 0; }
1107 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1108
1109 void set_contended_group(u2 group) { _contended_group = group; }
1110 u2 contended_group() const { return _contended_group; }
1111
1112 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1113
1114 void set_stable(bool stable) { set_annotation(_field_Stable); }
1115 bool is_stable() const { return has_annotation(_field_Stable); }
1116 };
1117
1118 // This class also doubles as a holder for metadata cleanup.
1119 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1120 private:
1121 ClassLoaderData* _loader_data;
1122 AnnotationArray* _field_annotations;
1123 AnnotationArray* _field_type_annotations;
1124 public:
1125 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1126 AnnotationCollector(_in_field),
1127 _loader_data(loader_data),
1128 _field_annotations(NULL),
1129 _field_type_annotations(NULL) {}
1130 ~FieldAnnotationCollector();
1131 void apply_to(FieldInfo* f);
1132 AnnotationArray* field_annotations() { return _field_annotations; }
1133 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1134
1135 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1136 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1137 };
1138
1139 class MethodAnnotationCollector : public AnnotationCollector{
1140 public:
1141 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1142 void apply_to(const methodHandle& m);
1143 };
1144
1145 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1146 public:
1147 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1148 void apply_to(InstanceKlass* ik);
1149 };
1150
1151
1152 static int skip_annotation_value(const u1*, int, int); // fwd decl
1153
1154 // Safely increment index by val if does not pass limit
1155 #define SAFE_ADD(index, limit, val) \
1156 if (index >= limit - val) return limit; \
1157 index += val;
1158
1159 // Skip an annotation. Return >=limit if there is any problem.
1160 static int skip_annotation(const u1* buffer, int limit, int index) {
1161 assert(buffer != NULL, "invariant");
1162 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1163 // value := switch (tag:u1) { ... }
1164 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1165 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1166 while (--nmem >= 0 && index < limit) {
1167 SAFE_ADD(index, limit, 2); // skip member
1168 index = skip_annotation_value(buffer, limit, index);
1169 }
1170 return index;
1171 }
1172
1173 // Skip an annotation value. Return >=limit if there is any problem.
1174 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1175 assert(buffer != NULL, "invariant");
1176
1177 // value := switch (tag:u1) {
1178 // case B, C, I, S, Z, D, F, J, c: con:u2;
1179 // case e: e_class:u2 e_name:u2;
1180 // case s: s_con:u2;
1181 // case [: do(nval:u2) {value};
1182 // case @: annotation;
1183 // case s: s_con:u2;
1184 // }
1185 SAFE_ADD(index, limit, 1); // read tag
1186 const u1 tag = buffer[index - 1];
1187 switch (tag) {
1188 case 'B':
1189 case 'C':
1190 case 'I':
1191 case 'S':
1192 case 'Z':
1193 case 'D':
1194 case 'F':
1195 case 'J':
1196 case 'c':
1197 case 's':
1198 SAFE_ADD(index, limit, 2); // skip con or s_con
1199 break;
1200 case 'e':
1201 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1202 break;
1203 case '[':
1204 {
1205 SAFE_ADD(index, limit, 2); // read nval
1206 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1207 while (--nval >= 0 && index < limit) {
1208 index = skip_annotation_value(buffer, limit, index);
1209 }
1210 }
1211 break;
1212 case '@':
1213 index = skip_annotation(buffer, limit, index);
1214 break;
1215 default:
1216 return limit; // bad tag byte
1217 }
1218 return index;
1219 }
1220
1221 // Sift through annotations, looking for those significant to the VM:
1222 static void parse_annotations(const ConstantPool* const cp,
1223 const u1* buffer, int limit,
1224 AnnotationCollector* coll,
1225 ClassLoaderData* loader_data,
1226 const bool can_access_vm_annotations,
1227 TRAPS) {
1228
1229 assert(cp != NULL, "invariant");
1230 assert(buffer != NULL, "invariant");
1231 assert(coll != NULL, "invariant");
1232 assert(loader_data != NULL, "invariant");
1233
1234 // annotations := do(nann:u2) {annotation}
1235 int index = 2; // read nann
1236 if (index >= limit) return;
1237 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1238 enum { // initial annotation layout
1239 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1240 count_off = 2, // u2 such as 1 (one value)
1241 member_off = 4, // utf8 such as 'value'
1242 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1243 e_tag_val = 'e',
1244 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1245 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1246 e_size = 11, // end of 'e' annotation
1247 c_tag_val = 'c', // payload is type
1248 c_con_off = 7, // utf8 payload, such as 'I'
1249 c_size = 9, // end of 'c' annotation
1250 s_tag_val = 's', // payload is String
1251 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1252 s_size = 9,
1253 min_size = 6 // smallest possible size (zero members)
1254 };
1255 // Cannot add min_size to index in case of overflow MAX_INT
1256 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1257 int index0 = index;
1258 index = skip_annotation(buffer, limit, index);
1259 const u1* const abase = buffer + index0;
1260 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1261 const int count = Bytes::get_Java_u2((address)abase + count_off);
1262 const Symbol* const aname = check_symbol_at(cp, atype);
1263 if (aname == NULL) break; // invalid annotation name
1264 const Symbol* member = NULL;
1265 if (count >= 1) {
1266 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1267 member = check_symbol_at(cp, member_index);
1268 if (member == NULL) break; // invalid member name
1269 }
1270
1271 // Here is where parsing particular annotations will take place.
1272 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname, can_access_vm_annotations);
1273 if (AnnotationCollector::_unknown == id) continue;
1274 coll->set_annotation(id);
1275
1276 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1277 // @Contended can optionally specify the contention group.
1278 //
1279 // Contended group defines the equivalence class over the fields:
1280 // the fields within the same contended group are not treated distinct.
1281 // The only exception is default group, which does not incur the
1282 // equivalence. Naturally, contention group for classes is meaningless.
1283 //
1284 // While the contention group is specified as String, annotation
1285 // values are already interned, and we might as well use the constant
1286 // pool index as the group tag.
1287 //
1288 u2 group_index = 0; // default contended group
1289 if (count == 1
1290 && s_size == (index - index0) // match size
1291 && s_tag_val == *(abase + tag_off)
1292 && member == vmSymbols::value_name()) {
1293 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1294 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1295 group_index = 0; // default contended group
1296 }
1297 }
1298 coll->set_contended_group(group_index);
1299 }
1300 }
1301 }
1302
1303
1304 // Parse attributes for a field.
1305 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1306 u2 attributes_count,
1307 bool is_static, u2 signature_index,
1308 u2* const constantvalue_index_addr,
1309 bool* const is_synthetic_addr,
1310 u2* const generic_signature_index_addr,
1311 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1312 TRAPS) {
1313 assert(cfs != NULL, "invariant");
1314 assert(constantvalue_index_addr != NULL, "invariant");
1315 assert(is_synthetic_addr != NULL, "invariant");
1316 assert(generic_signature_index_addr != NULL, "invariant");
1317 assert(parsed_annotations != NULL, "invariant");
1318 assert(attributes_count > 0, "attributes_count should be greater than 0");
1319
1320 u2 constantvalue_index = 0;
1321 u2 generic_signature_index = 0;
1322 bool is_synthetic = false;
1323 const u1* runtime_visible_annotations = NULL;
1324 int runtime_visible_annotations_length = 0;
1325 const u1* runtime_invisible_annotations = NULL;
1326 int runtime_invisible_annotations_length = 0;
1327 const u1* runtime_visible_type_annotations = NULL;
1328 int runtime_visible_type_annotations_length = 0;
1329 const u1* runtime_invisible_type_annotations = NULL;
1330 int runtime_invisible_type_annotations_length = 0;
1331 bool runtime_invisible_annotations_exists = false;
1332 bool runtime_invisible_type_annotations_exists = false;
1333 const ConstantPool* const cp = _cp;
1334
1335 while (attributes_count--) {
1336 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1337 const u2 attribute_name_index = cfs->get_u2_fast();
1338 const u4 attribute_length = cfs->get_u4_fast();
1339 check_property(valid_symbol_at(attribute_name_index),
1340 "Invalid field attribute index %u in class file %s",
1341 attribute_name_index,
1342 CHECK);
1343
1344 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1345 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1346 // ignore if non-static
1347 if (constantvalue_index != 0) {
1348 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1349 }
1350 check_property(
1351 attribute_length == 2,
1352 "Invalid ConstantValue field attribute length %u in class file %s",
1353 attribute_length, CHECK);
1354
1355 constantvalue_index = cfs->get_u2(CHECK);
1356 if (_need_verify) {
1357 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1358 }
1359 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1360 if (attribute_length != 0) {
1361 classfile_parse_error(
1362 "Invalid Synthetic field attribute length %u in class file %s",
1363 attribute_length, CHECK);
1364 }
1365 is_synthetic = true;
1366 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1367 if (attribute_length != 0) {
1368 classfile_parse_error(
1369 "Invalid Deprecated field attribute length %u in class file %s",
1370 attribute_length, CHECK);
1371 }
1372 } else if (_major_version >= JAVA_1_5_VERSION) {
1373 if (attribute_name == vmSymbols::tag_signature()) {
1374 if (generic_signature_index != 0) {
1375 classfile_parse_error(
1376 "Multiple Signature attributes for field in class file %s", CHECK);
1377 }
1378 if (attribute_length != 2) {
1379 classfile_parse_error(
1380 "Wrong size %u for field's Signature attribute in class file %s",
1381 attribute_length, CHECK);
1382 }
1383 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1384 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1385 if (runtime_visible_annotations != NULL) {
1386 classfile_parse_error(
1387 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1388 }
1389 runtime_visible_annotations_length = attribute_length;
1390 runtime_visible_annotations = cfs->current();
1391 assert(runtime_visible_annotations != NULL, "null visible annotations");
1392 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1393 parse_annotations(cp,
1394 runtime_visible_annotations,
1395 runtime_visible_annotations_length,
1396 parsed_annotations,
1397 _loader_data,
1398 _can_access_vm_annotations,
1399 CHECK);
1400 cfs->skip_u1_fast(runtime_visible_annotations_length);
1401 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1402 if (runtime_invisible_annotations_exists) {
1403 classfile_parse_error(
1404 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1405 }
1406 runtime_invisible_annotations_exists = true;
1407 if (PreserveAllAnnotations) {
1408 runtime_invisible_annotations_length = attribute_length;
1409 runtime_invisible_annotations = cfs->current();
1410 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1411 }
1412 cfs->skip_u1(attribute_length, CHECK);
1413 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1414 if (runtime_visible_type_annotations != NULL) {
1415 classfile_parse_error(
1416 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1417 }
1418 runtime_visible_type_annotations_length = attribute_length;
1419 runtime_visible_type_annotations = cfs->current();
1420 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1421 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1422 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1423 if (runtime_invisible_type_annotations_exists) {
1424 classfile_parse_error(
1425 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1426 } else {
1427 runtime_invisible_type_annotations_exists = true;
1428 }
1429 if (PreserveAllAnnotations) {
1430 runtime_invisible_type_annotations_length = attribute_length;
1431 runtime_invisible_type_annotations = cfs->current();
1432 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1433 }
1434 cfs->skip_u1(attribute_length, CHECK);
1435 } else {
1436 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1437 }
1438 } else {
1439 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1440 }
1441 }
1442
1443 *constantvalue_index_addr = constantvalue_index;
1444 *is_synthetic_addr = is_synthetic;
1445 *generic_signature_index_addr = generic_signature_index;
1446 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1447 runtime_visible_annotations_length,
1448 runtime_invisible_annotations,
1449 runtime_invisible_annotations_length,
1450 CHECK);
1451 parsed_annotations->set_field_annotations(a);
1452 a = assemble_annotations(runtime_visible_type_annotations,
1453 runtime_visible_type_annotations_length,
1454 runtime_invisible_type_annotations,
1455 runtime_invisible_type_annotations_length,
1456 CHECK);
1457 parsed_annotations->set_field_type_annotations(a);
1458 return;
1459 }
1460
1461
1462 // Field allocation types. Used for computing field offsets.
1463
1464 enum FieldAllocationType {
1465 STATIC_OOP, // Oops
1466 STATIC_BYTE, // Boolean, Byte, char
1467 STATIC_SHORT, // shorts
1468 STATIC_WORD, // ints
1469 STATIC_DOUBLE, // aligned long or double
1470 NONSTATIC_OOP,
1471 NONSTATIC_BYTE,
1472 NONSTATIC_SHORT,
1473 NONSTATIC_WORD,
1474 NONSTATIC_DOUBLE,
1475 MAX_FIELD_ALLOCATION_TYPE,
1476 BAD_ALLOCATION_TYPE = -1
1477 };
1478
1479 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1480 BAD_ALLOCATION_TYPE, // 0
1481 BAD_ALLOCATION_TYPE, // 1
1482 BAD_ALLOCATION_TYPE, // 2
1483 BAD_ALLOCATION_TYPE, // 3
1484 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1485 NONSTATIC_SHORT, // T_CHAR = 5,
1486 NONSTATIC_WORD, // T_FLOAT = 6,
1487 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1488 NONSTATIC_BYTE, // T_BYTE = 8,
1489 NONSTATIC_SHORT, // T_SHORT = 9,
1490 NONSTATIC_WORD, // T_INT = 10,
1491 NONSTATIC_DOUBLE, // T_LONG = 11,
1492 NONSTATIC_OOP, // T_OBJECT = 12,
1493 NONSTATIC_OOP, // T_ARRAY = 13,
1494 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1495 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1496 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1497 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1498 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1499 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1500 BAD_ALLOCATION_TYPE, // 0
1501 BAD_ALLOCATION_TYPE, // 1
1502 BAD_ALLOCATION_TYPE, // 2
1503 BAD_ALLOCATION_TYPE, // 3
1504 STATIC_BYTE , // T_BOOLEAN = 4,
1505 STATIC_SHORT, // T_CHAR = 5,
1506 STATIC_WORD, // T_FLOAT = 6,
1507 STATIC_DOUBLE, // T_DOUBLE = 7,
1508 STATIC_BYTE, // T_BYTE = 8,
1509 STATIC_SHORT, // T_SHORT = 9,
1510 STATIC_WORD, // T_INT = 10,
1511 STATIC_DOUBLE, // T_LONG = 11,
1512 STATIC_OOP, // T_OBJECT = 12,
1513 STATIC_OOP, // T_ARRAY = 13,
1514 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1515 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1516 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1517 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1518 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1519 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1520 };
1521
1522 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1523 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1524 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1525 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1526 return result;
1527 }
1528
1529 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1530 public:
1531 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1532
1533 FieldAllocationCount() {
1534 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1535 count[i] = 0;
1536 }
1537 }
1538
1539 FieldAllocationType update(bool is_static, BasicType type) {
1540 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1541 if (atype != BAD_ALLOCATION_TYPE) {
1542 // Make sure there is no overflow with injected fields.
1543 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1544 count[atype]++;
1545 }
1546 return atype;
1547 }
1548 };
1549
1550 // Side-effects: populates the _fields, _fields_annotations,
1551 // _fields_type_annotations fields
1552 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1553 bool is_interface,
1554 FieldAllocationCount* const fac,
1555 ConstantPool* cp,
1556 const int cp_size,
1557 u2* const java_fields_count_ptr,
1558 TRAPS) {
1559
1560 assert(cfs != NULL, "invariant");
1561 assert(fac != NULL, "invariant");
1562 assert(cp != NULL, "invariant");
1563 assert(java_fields_count_ptr != NULL, "invariant");
1564
1565 assert(NULL == _fields, "invariant");
1566 assert(NULL == _fields_annotations, "invariant");
1567 assert(NULL == _fields_type_annotations, "invariant");
1568
1569 cfs->guarantee_more(2, CHECK); // length
1570 const u2 length = cfs->get_u2_fast();
1571 *java_fields_count_ptr = length;
1572
1573 int num_injected = 0;
1574 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1575 &num_injected);
1576 const int total_fields = length + num_injected;
1577
1578 // The field array starts with tuples of shorts
1579 // [access, name index, sig index, initial value index, byte offset].
1580 // A generic signature slot only exists for field with generic
1581 // signature attribute. And the access flag is set with
1582 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1583 // signature slots are at the end of the field array and after all
1584 // other fields data.
1585 //
1586 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1587 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1588 // ...
1589 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1590 // [generic signature index]
1591 // [generic signature index]
1592 // ...
1593 //
1594 // Allocate a temporary resource array for field data. For each field,
1595 // a slot is reserved in the temporary array for the generic signature
1596 // index. After parsing all fields, the data are copied to a permanent
1597 // array and any unused slots will be discarded.
1598 ResourceMark rm(THREAD);
1599 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1600 u2,
1601 total_fields * (FieldInfo::field_slots + 1));
1602
1603 // The generic signature slots start after all other fields' data.
1604 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1605 int num_generic_signature = 0;
1606 for (int n = 0; n < length; n++) {
1607 // access_flags, name_index, descriptor_index, attributes_count
1608 cfs->guarantee_more(8, CHECK);
1609
1610 AccessFlags access_flags;
1611 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1612 verify_legal_field_modifiers(flags, is_interface, CHECK);
1613 access_flags.set_flags(flags);
1614
1615 const u2 name_index = cfs->get_u2_fast();
1616 check_property(valid_symbol_at(name_index),
1617 "Invalid constant pool index %u for field name in class file %s",
1618 name_index, CHECK);
1619 const Symbol* const name = cp->symbol_at(name_index);
1620 verify_legal_field_name(name, CHECK);
1621
1622 const u2 signature_index = cfs->get_u2_fast();
1623 check_property(valid_symbol_at(signature_index),
1624 "Invalid constant pool index %u for field signature in class file %s",
1625 signature_index, CHECK);
1626 const Symbol* const sig = cp->symbol_at(signature_index);
1627 verify_legal_field_signature(name, sig, CHECK);
1628
1629 u2 constantvalue_index = 0;
1630 bool is_synthetic = false;
1631 u2 generic_signature_index = 0;
1632 const bool is_static = access_flags.is_static();
1633 FieldAnnotationCollector parsed_annotations(_loader_data);
1634
1635 const u2 attributes_count = cfs->get_u2_fast();
1636 if (attributes_count > 0) {
1637 parse_field_attributes(cfs,
1638 attributes_count,
1639 is_static,
1640 signature_index,
1641 &constantvalue_index,
1642 &is_synthetic,
1643 &generic_signature_index,
1644 &parsed_annotations,
1645 CHECK);
1646
1647 if (parsed_annotations.field_annotations() != NULL) {
1648 if (_fields_annotations == NULL) {
1649 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1650 _loader_data, length, NULL,
1651 CHECK);
1652 }
1653 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1654 parsed_annotations.set_field_annotations(NULL);
1655 }
1656 if (parsed_annotations.field_type_annotations() != NULL) {
1657 if (_fields_type_annotations == NULL) {
1658 _fields_type_annotations =
1659 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1660 length,
1661 NULL,
1662 CHECK);
1663 }
1664 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1665 parsed_annotations.set_field_type_annotations(NULL);
1666 }
1667
1668 if (is_synthetic) {
1669 access_flags.set_is_synthetic();
1670 }
1671 if (generic_signature_index != 0) {
1672 access_flags.set_field_has_generic_signature();
1673 fa[generic_signature_slot] = generic_signature_index;
1674 generic_signature_slot ++;
1675 num_generic_signature ++;
1676 }
1677 }
1678
1679 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1680 field->initialize(access_flags.as_short(),
1681 name_index,
1682 signature_index,
1683 constantvalue_index);
1684 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1685
1686 // Remember how many oops we encountered and compute allocation type
1687 const FieldAllocationType atype = fac->update(is_static, type);
1688 field->set_allocation_type(atype);
1689
1690 // After field is initialized with type, we can augment it with aux info
1691 if (parsed_annotations.has_any_annotations())
1692 parsed_annotations.apply_to(field);
1693 }
1694
1695 int index = length;
1696 if (num_injected != 0) {
1697 for (int n = 0; n < num_injected; n++) {
1698 // Check for duplicates
1699 if (injected[n].may_be_java) {
1700 const Symbol* const name = injected[n].name();
1701 const Symbol* const signature = injected[n].signature();
1702 bool duplicate = false;
1703 for (int i = 0; i < length; i++) {
1704 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1705 if (name == cp->symbol_at(f->name_index()) &&
1706 signature == cp->symbol_at(f->signature_index())) {
1707 // Symbol is desclared in Java so skip this one
1708 duplicate = true;
1709 break;
1710 }
1711 }
1712 if (duplicate) {
1713 // These will be removed from the field array at the end
1714 continue;
1715 }
1716 }
1717
1718 // Injected field
1719 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1720 field->initialize(JVM_ACC_FIELD_INTERNAL,
1721 injected[n].name_index,
1722 injected[n].signature_index,
1723 0);
1724
1725 const BasicType type = FieldType::basic_type(injected[n].signature());
1726
1727 // Remember how many oops we encountered and compute allocation type
1728 const FieldAllocationType atype = fac->update(false, type);
1729 field->set_allocation_type(atype);
1730 index++;
1731 }
1732 }
1733
1734 assert(NULL == _fields, "invariant");
1735
1736 _fields =
1737 MetadataFactory::new_array<u2>(_loader_data,
1738 index * FieldInfo::field_slots + num_generic_signature,
1739 CHECK);
1740 // Sometimes injected fields already exist in the Java source so
1741 // the fields array could be too long. In that case the
1742 // fields array is trimed. Also unused slots that were reserved
1743 // for generic signature indexes are discarded.
1744 {
1745 int i = 0;
1746 for (; i < index * FieldInfo::field_slots; i++) {
1747 _fields->at_put(i, fa[i]);
1748 }
1749 for (int j = total_fields * FieldInfo::field_slots;
1750 j < generic_signature_slot; j++) {
1751 _fields->at_put(i++, fa[j]);
1752 }
1753 assert(_fields->length() == i, "");
1754 }
1755
1756 if (_need_verify && length > 1) {
1757 // Check duplicated fields
1758 ResourceMark rm(THREAD);
1759 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1760 THREAD, NameSigHash*, HASH_ROW_SIZE);
1761 initialize_hashtable(names_and_sigs);
1762 bool dup = false;
1763 const Symbol* name = NULL;
1764 const Symbol* sig = NULL;
1765 {
1766 debug_only(NoSafepointVerifier nsv;)
1767 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1768 name = fs.name();
1769 sig = fs.signature();
1770 // If no duplicates, add name/signature in hashtable names_and_sigs.
1771 if (!put_after_lookup(name, sig, names_and_sigs)) {
1772 dup = true;
1773 break;
1774 }
1775 }
1776 }
1777 if (dup) {
1778 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1779 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1780 }
1781 }
1782 }
1783
1784
1785 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1786 u4 code_length,
1787 u4 exception_table_length,
1788 TRAPS) {
1789 assert(cfs != NULL, "invariant");
1790
1791 const unsafe_u2* const exception_table_start = cfs->current();
1792 assert(exception_table_start != NULL, "null exception table");
1793
1794 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1795 // end_pc,
1796 // handler_pc,
1797 // catch_type_index
1798
1799 // Will check legal target after parsing code array in verifier.
1800 if (_need_verify) {
1801 for (unsigned int i = 0; i < exception_table_length; i++) {
1802 const u2 start_pc = cfs->get_u2_fast();
1803 const u2 end_pc = cfs->get_u2_fast();
1804 const u2 handler_pc = cfs->get_u2_fast();
1805 const u2 catch_type_index = cfs->get_u2_fast();
1806 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1807 "Illegal exception table range in class file %s",
1808 CHECK_NULL);
1809 guarantee_property(handler_pc < code_length,
1810 "Illegal exception table handler in class file %s",
1811 CHECK_NULL);
1812 if (catch_type_index != 0) {
1813 guarantee_property(valid_klass_reference_at(catch_type_index),
1814 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1815 }
1816 }
1817 } else {
1818 cfs->skip_u2_fast(exception_table_length * 4);
1819 }
1820 return exception_table_start;
1821 }
1822
1823 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1824 u4 code_length,
1825 CompressedLineNumberWriteStream**const write_stream,
1826 TRAPS) {
1827
1828 const ClassFileStream* const cfs = _stream;
1829 unsigned int num_entries = cfs->get_u2(CHECK);
1830
1831 // Each entry is a u2 start_pc, and a u2 line_number
1832 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1833
1834 // Verify line number attribute and table length
1835 check_property(
1836 code_attribute_length == sizeof(u2) + length_in_bytes,
1837 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1838
1839 cfs->guarantee_more(length_in_bytes, CHECK);
1840
1841 if ((*write_stream) == NULL) {
1842 if (length_in_bytes > fixed_buffer_size) {
1843 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1844 } else {
1845 (*write_stream) = new CompressedLineNumberWriteStream(
1846 _linenumbertable_buffer, fixed_buffer_size);
1847 }
1848 }
1849
1850 while (num_entries-- > 0) {
1851 const u2 bci = cfs->get_u2_fast(); // start_pc
1852 const u2 line = cfs->get_u2_fast(); // line_number
1853 guarantee_property(bci < code_length,
1854 "Invalid pc in LineNumberTable in class file %s", CHECK);
1855 (*write_stream)->write_pair(bci, line);
1856 }
1857 }
1858
1859
1860 class LVT_Hash : public AllStatic {
1861 public:
1862
1863 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1864 /*
1865 * 3-tuple start_bci/length/slot has to be unique key,
1866 * so the following comparison seems to be redundant:
1867 * && elem->name_cp_index == entry->_elem->name_cp_index
1868 */
1869 return (e0.start_bci == e1.start_bci &&
1870 e0.length == e1.length &&
1871 e0.name_cp_index == e1.name_cp_index &&
1872 e0.slot == e1.slot);
1873 }
1874
1875 static unsigned int hash(LocalVariableTableElement const& e0) {
1876 unsigned int raw_hash = e0.start_bci;
1877
1878 raw_hash = e0.length + raw_hash * 37;
1879 raw_hash = e0.name_cp_index + raw_hash * 37;
1880 raw_hash = e0.slot + raw_hash * 37;
1881
1882 return raw_hash;
1883 }
1884 };
1885
1886
1887 // Class file LocalVariableTable elements.
1888 class Classfile_LVT_Element {
1889 public:
1890 u2 start_bci;
1891 u2 length;
1892 u2 name_cp_index;
1893 u2 descriptor_cp_index;
1894 u2 slot;
1895 };
1896
1897 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1898 LocalVariableTableElement* const lvt) {
1899 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1900 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1901 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1902 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1903 lvt->signature_cp_index = 0;
1904 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1905 }
1906
1907 // Function is used to parse both attributes:
1908 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1909 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1910 u4 code_length,
1911 u2 max_locals,
1912 u4 code_attribute_length,
1913 u2* const localvariable_table_length,
1914 bool isLVTT,
1915 TRAPS) {
1916 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1917 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1918 const unsigned int size =
1919 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1920
1921 const ConstantPool* const cp = _cp;
1922
1923 // Verify local variable table attribute has right length
1924 if (_need_verify) {
1925 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1926 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1927 }
1928
1929 const unsafe_u2* const localvariable_table_start = cfs->current();
1930 assert(localvariable_table_start != NULL, "null local variable table");
1931 if (!_need_verify) {
1932 cfs->skip_u2_fast(size);
1933 } else {
1934 cfs->guarantee_more(size * 2, CHECK_NULL);
1935 for(int i = 0; i < (*localvariable_table_length); i++) {
1936 const u2 start_pc = cfs->get_u2_fast();
1937 const u2 length = cfs->get_u2_fast();
1938 const u2 name_index = cfs->get_u2_fast();
1939 const u2 descriptor_index = cfs->get_u2_fast();
1940 const u2 index = cfs->get_u2_fast();
1941 // Assign to a u4 to avoid overflow
1942 const u4 end_pc = (u4)start_pc + (u4)length;
1943
1944 if (start_pc >= code_length) {
1945 classfile_parse_error(
1946 "Invalid start_pc %u in %s in class file %s",
1947 start_pc, tbl_name, CHECK_NULL);
1948 }
1949 if (end_pc > code_length) {
1950 classfile_parse_error(
1951 "Invalid length %u in %s in class file %s",
1952 length, tbl_name, CHECK_NULL);
1953 }
1954 const int cp_size = cp->length();
1955 guarantee_property(valid_symbol_at(name_index),
1956 "Name index %u in %s has bad constant type in class file %s",
1957 name_index, tbl_name, CHECK_NULL);
1958 guarantee_property(valid_symbol_at(descriptor_index),
1959 "Signature index %u in %s has bad constant type in class file %s",
1960 descriptor_index, tbl_name, CHECK_NULL);
1961
1962 const Symbol* const name = cp->symbol_at(name_index);
1963 const Symbol* const sig = cp->symbol_at(descriptor_index);
1964 verify_legal_field_name(name, CHECK_NULL);
1965 u2 extra_slot = 0;
1966 if (!isLVTT) {
1967 verify_legal_field_signature(name, sig, CHECK_NULL);
1968
1969 // 4894874: check special cases for double and long local variables
1970 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1971 sig == vmSymbols::type_signature(T_LONG)) {
1972 extra_slot = 1;
1973 }
1974 }
1975 guarantee_property((index + extra_slot) < max_locals,
1976 "Invalid index %u in %s in class file %s",
1977 index, tbl_name, CHECK_NULL);
1978 }
1979 }
1980 return localvariable_table_start;
1981 }
1982
1983 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1984 u4 code_attribute_length,
1985 bool need_verify,
1986 TRAPS) {
1987 assert(cfs != NULL, "invariant");
1988
1989 if (0 == code_attribute_length) {
1990 return NULL;
1991 }
1992
1993 const u1* const stackmap_table_start = cfs->current();
1994 assert(stackmap_table_start != NULL, "null stackmap table");
1995
1996 // check code_attribute_length first
1997 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1998
1999 if (!need_verify && !DumpSharedSpaces) {
2000 return NULL;
2001 }
2002 return stackmap_table_start;
2003 }
2004
2005 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2006 u2* const checked_exceptions_length,
2007 u4 method_attribute_length,
2008 TRAPS) {
2009 assert(cfs != NULL, "invariant");
2010 assert(checked_exceptions_length != NULL, "invariant");
2011
2012 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2013 *checked_exceptions_length = cfs->get_u2_fast();
2014 const unsigned int size =
2015 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2016 const unsafe_u2* const checked_exceptions_start = cfs->current();
2017 assert(checked_exceptions_start != NULL, "null checked exceptions");
2018 if (!_need_verify) {
2019 cfs->skip_u2_fast(size);
2020 } else {
2021 // Verify each value in the checked exception table
2022 u2 checked_exception;
2023 const u2 len = *checked_exceptions_length;
2024 cfs->guarantee_more(2 * len, CHECK_NULL);
2025 for (int i = 0; i < len; i++) {
2026 checked_exception = cfs->get_u2_fast();
2027 check_property(
2028 valid_klass_reference_at(checked_exception),
2029 "Exception name has bad type at constant pool %u in class file %s",
2030 checked_exception, CHECK_NULL);
2031 }
2032 }
2033 // check exceptions attribute length
2034 if (_need_verify) {
2035 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2036 sizeof(u2) * size),
2037 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2038 }
2039 return checked_exceptions_start;
2040 }
2041
2042 void ClassFileParser::throwIllegalSignature(const char* type,
2043 const Symbol* name,
2044 const Symbol* sig,
2045 TRAPS) const {
2046 assert(name != NULL, "invariant");
2047 assert(sig != NULL, "invariant");
2048
2049 ResourceMark rm(THREAD);
2050 Exceptions::fthrow(THREAD_AND_LOCATION,
2051 vmSymbols::java_lang_ClassFormatError(),
2052 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2053 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2054 }
2055
2056 AnnotationCollector::ID
2057 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2058 const Symbol* name,
2059 const bool can_access_vm_annotations) {
2060 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2061 // Privileged code can use all annotations. Other code silently drops some.
2062 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2063 loader_data->is_platform_class_loader_data() ||
2064 loader_data->is_shortlived() ||
2065 can_access_vm_annotations;
2066 switch (sid) {
2067 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2068 if (_location != _in_method) break; // only allow for methods
2069 if (!privileged) break; // only allow in privileged code
2070 return _method_CallerSensitive;
2071 }
2072 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2073 if (_location != _in_method) break; // only allow for methods
2074 if (!privileged) break; // only allow in privileged code
2075 return _method_ForceInline;
2076 }
2077 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2078 if (_location != _in_method) break; // only allow for methods
2079 if (!privileged) break; // only allow in privileged code
2080 return _method_DontInline;
2081 }
2082 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2083 if (_location != _in_method) break; // only allow for methods
2084 if (!privileged) break; // only allow in privileged code
2085 return _method_InjectedProfile;
2086 }
2087 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2088 if (_location != _in_method) break; // only allow for methods
2089 if (!privileged) break; // only allow in privileged code
2090 return _method_LambdaForm_Compiled;
2091 }
2092 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2093 if (_location != _in_method) break; // only allow for methods
2094 if (!privileged) break; // only allow in privileged code
2095 return _method_Hidden;
2096 }
2097 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2098 if (_location != _in_method) break; // only allow for methods
2099 if (!privileged) break; // only allow in privileged code
2100 return _method_HotSpotIntrinsicCandidate;
2101 }
2102 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2103 if (_location != _in_field) break; // only allow for fields
2104 if (!privileged) break; // only allow in privileged code
2105 return _field_Stable;
2106 }
2107 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2108 if (_location != _in_field && _location != _in_class) {
2109 break; // only allow for fields and classes
2110 }
2111 if (!EnableContended || (RestrictContended && !privileged)) {
2112 break; // honor privileges
2113 }
2114 return _jdk_internal_vm_annotation_Contended;
2115 }
2116 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2117 if (_location != _in_method) break; // only allow for methods
2118 if (RestrictReservedStack && !privileged) break; // honor privileges
2119 return _jdk_internal_vm_annotation_ReservedStackAccess;
2120 }
2121 default: {
2122 break;
2123 }
2124 }
2125 return AnnotationCollector::_unknown;
2126 }
2127
2128 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2129 if (is_contended())
2130 f->set_contended_group(contended_group());
2131 if (is_stable())
2132 f->set_stable(true);
2133 }
2134
2135 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2136 // If there's an error deallocate metadata for field annotations
2137 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2138 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2139 }
2140
2141 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2142 if (has_annotation(_method_CallerSensitive))
2143 m->set_caller_sensitive(true);
2144 if (has_annotation(_method_ForceInline))
2145 m->set_force_inline(true);
2146 if (has_annotation(_method_DontInline))
2147 m->set_dont_inline(true);
2148 if (has_annotation(_method_InjectedProfile))
2149 m->set_has_injected_profile(true);
2150 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2151 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2152 if (has_annotation(_method_Hidden))
2153 m->set_hidden(true);
2154 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2155 m->set_intrinsic_candidate(true);
2156 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2157 m->set_has_reserved_stack_access(true);
2158 }
2159
2160 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2161 assert(ik != NULL, "invariant");
2162 ik->set_is_contended(is_contended());
2163 }
2164
2165 #define MAX_ARGS_SIZE 255
2166 #define MAX_CODE_SIZE 65535
2167 #define INITIAL_MAX_LVT_NUMBER 256
2168
2169 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2170 *
2171 * Rules for LVT's and LVTT's are:
2172 * - There can be any number of LVT's and LVTT's.
2173 * - If there are n LVT's, it is the same as if there was just
2174 * one LVT containing all the entries from the n LVT's.
2175 * - There may be no more than one LVT entry per local variable.
2176 * Two LVT entries are 'equal' if these fields are the same:
2177 * start_pc, length, name, slot
2178 * - There may be no more than one LVTT entry per each LVT entry.
2179 * Each LVTT entry has to match some LVT entry.
2180 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2181 */
2182 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2183 int lvt_cnt,
2184 u2* const localvariable_table_length,
2185 const unsafe_u2** const localvariable_table_start,
2186 int lvtt_cnt,
2187 u2* const localvariable_type_table_length,
2188 const unsafe_u2** const localvariable_type_table_start,
2189 TRAPS) {
2190
2191 ResourceMark rm(THREAD);
2192
2193 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2194 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2195
2196 LVT_HashTable* const table = new LVT_HashTable();
2197
2198 // To fill LocalVariableTable in
2199 const Classfile_LVT_Element* cf_lvt;
2200 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2201
2202 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2203 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2204 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2205 copy_lvt_element(&cf_lvt[idx], lvt);
2206 // If no duplicates, add LVT elem in hashtable.
2207 if (table->put(*lvt, lvt) == false
2208 && _need_verify
2209 && _major_version >= JAVA_1_5_VERSION) {
2210 classfile_parse_error("Duplicated LocalVariableTable attribute "
2211 "entry for '%s' in class file %s",
2212 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2213 CHECK);
2214 }
2215 }
2216 }
2217
2218 // To merge LocalVariableTable and LocalVariableTypeTable
2219 const Classfile_LVT_Element* cf_lvtt;
2220 LocalVariableTableElement lvtt_elem;
2221
2222 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2223 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2224 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2225 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2226 LocalVariableTableElement** entry = table->get(lvtt_elem);
2227 if (entry == NULL) {
2228 if (_need_verify) {
2229 classfile_parse_error("LVTT entry for '%s' in class file %s "
2230 "does not match any LVT entry",
2231 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2232 CHECK);
2233 }
2234 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2235 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2236 "entry for '%s' in class file %s",
2237 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2238 CHECK);
2239 } else {
2240 // to add generic signatures into LocalVariableTable
2241 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2242 }
2243 }
2244 }
2245 }
2246
2247
2248 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2249 const u1* runtime_visible_annotations,
2250 int runtime_visible_annotations_length,
2251 const u1* runtime_invisible_annotations,
2252 int runtime_invisible_annotations_length,
2253 const u1* runtime_visible_parameter_annotations,
2254 int runtime_visible_parameter_annotations_length,
2255 const u1* runtime_invisible_parameter_annotations,
2256 int runtime_invisible_parameter_annotations_length,
2257 const u1* runtime_visible_type_annotations,
2258 int runtime_visible_type_annotations_length,
2259 const u1* runtime_invisible_type_annotations,
2260 int runtime_invisible_type_annotations_length,
2261 const u1* annotation_default,
2262 int annotation_default_length,
2263 TRAPS) {
2264
2265 AnnotationArray* a;
2266
2267 if (runtime_visible_annotations_length +
2268 runtime_invisible_annotations_length > 0) {
2269 a = assemble_annotations(runtime_visible_annotations,
2270 runtime_visible_annotations_length,
2271 runtime_invisible_annotations,
2272 runtime_invisible_annotations_length,
2273 CHECK);
2274 cm->set_method_annotations(a);
2275 }
2276
2277 if (runtime_visible_parameter_annotations_length +
2278 runtime_invisible_parameter_annotations_length > 0) {
2279 a = assemble_annotations(runtime_visible_parameter_annotations,
2280 runtime_visible_parameter_annotations_length,
2281 runtime_invisible_parameter_annotations,
2282 runtime_invisible_parameter_annotations_length,
2283 CHECK);
2284 cm->set_parameter_annotations(a);
2285 }
2286
2287 if (annotation_default_length > 0) {
2288 a = assemble_annotations(annotation_default,
2289 annotation_default_length,
2290 NULL,
2291 0,
2292 CHECK);
2293 cm->set_default_annotations(a);
2294 }
2295
2296 if (runtime_visible_type_annotations_length +
2297 runtime_invisible_type_annotations_length > 0) {
2298 a = assemble_annotations(runtime_visible_type_annotations,
2299 runtime_visible_type_annotations_length,
2300 runtime_invisible_type_annotations,
2301 runtime_invisible_type_annotations_length,
2302 CHECK);
2303 cm->set_type_annotations(a);
2304 }
2305 }
2306
2307
2308 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2309 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2310 // Method* to save footprint, so we only know the size of the resulting Method* when the
2311 // entire method attribute is parsed.
2312 //
2313 // The promoted_flags parameter is used to pass relevant access_flags
2314 // from the method back up to the containing klass. These flag values
2315 // are added to klass's access_flags.
2316
2317 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2318 bool is_interface,
2319 const ConstantPool* cp,
2320 AccessFlags* const promoted_flags,
2321 TRAPS) {
2322 assert(cfs != NULL, "invariant");
2323 assert(cp != NULL, "invariant");
2324 assert(promoted_flags != NULL, "invariant");
2325
2326 ResourceMark rm(THREAD);
2327 // Parse fixed parts:
2328 // access_flags, name_index, descriptor_index, attributes_count
2329 cfs->guarantee_more(8, CHECK_NULL);
2330
2331 int flags = cfs->get_u2_fast();
2332 const u2 name_index = cfs->get_u2_fast();
2333 const int cp_size = cp->length();
2334 check_property(
2335 valid_symbol_at(name_index),
2336 "Illegal constant pool index %u for method name in class file %s",
2337 name_index, CHECK_NULL);
2338 const Symbol* const name = cp->symbol_at(name_index);
2339 verify_legal_method_name(name, CHECK_NULL);
2340
2341 const u2 signature_index = cfs->get_u2_fast();
2342 guarantee_property(
2343 valid_symbol_at(signature_index),
2344 "Illegal constant pool index %u for method signature in class file %s",
2345 signature_index, CHECK_NULL);
2346 const Symbol* const signature = cp->symbol_at(signature_index);
2347
2348 if (name == vmSymbols::class_initializer_name()) {
2349 // We ignore the other access flags for a valid class initializer.
2350 // (JVM Spec 2nd ed., chapter 4.6)
2351 if (_major_version < 51) { // backward compatibility
2352 flags = JVM_ACC_STATIC;
2353 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2354 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2355 } else {
2356 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2357 }
2358 } else {
2359 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2360 }
2361
2362 if (name == vmSymbols::object_initializer_name() && is_interface) {
2363 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2364 }
2365
2366 int args_size = -1; // only used when _need_verify is true
2367 if (_need_verify) {
2368 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2369 verify_legal_method_signature(name, signature, CHECK_NULL);
2370 if (args_size > MAX_ARGS_SIZE) {
2371 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2372 }
2373 }
2374
2375 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2376
2377 // Default values for code and exceptions attribute elements
2378 u2 max_stack = 0;
2379 u2 max_locals = 0;
2380 u4 code_length = 0;
2381 const u1* code_start = 0;
2382 u2 exception_table_length = 0;
2383 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2384 Array<int>* exception_handlers = Universe::the_empty_int_array();
2385 u2 checked_exceptions_length = 0;
2386 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2387 CompressedLineNumberWriteStream* linenumber_table = NULL;
2388 int linenumber_table_length = 0;
2389 int total_lvt_length = 0;
2390 u2 lvt_cnt = 0;
2391 u2 lvtt_cnt = 0;
2392 bool lvt_allocated = false;
2393 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2394 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2395 u2* localvariable_table_length = NULL;
2396 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2397 u2* localvariable_type_table_length = NULL;
2398 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2399 int method_parameters_length = -1;
2400 const u1* method_parameters_data = NULL;
2401 bool method_parameters_seen = false;
2402 bool parsed_code_attribute = false;
2403 bool parsed_checked_exceptions_attribute = false;
2404 bool parsed_stackmap_attribute = false;
2405 // stackmap attribute - JDK1.5
2406 const u1* stackmap_data = NULL;
2407 int stackmap_data_length = 0;
2408 u2 generic_signature_index = 0;
2409 MethodAnnotationCollector parsed_annotations;
2410 const u1* runtime_visible_annotations = NULL;
2411 int runtime_visible_annotations_length = 0;
2412 const u1* runtime_invisible_annotations = NULL;
2413 int runtime_invisible_annotations_length = 0;
2414 const u1* runtime_visible_parameter_annotations = NULL;
2415 int runtime_visible_parameter_annotations_length = 0;
2416 const u1* runtime_invisible_parameter_annotations = NULL;
2417 int runtime_invisible_parameter_annotations_length = 0;
2418 const u1* runtime_visible_type_annotations = NULL;
2419 int runtime_visible_type_annotations_length = 0;
2420 const u1* runtime_invisible_type_annotations = NULL;
2421 int runtime_invisible_type_annotations_length = 0;
2422 bool runtime_invisible_annotations_exists = false;
2423 bool runtime_invisible_type_annotations_exists = false;
2424 bool runtime_invisible_parameter_annotations_exists = false;
2425 const u1* annotation_default = NULL;
2426 int annotation_default_length = 0;
2427
2428 // Parse code and exceptions attribute
2429 u2 method_attributes_count = cfs->get_u2_fast();
2430 while (method_attributes_count--) {
2431 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2432 const u2 method_attribute_name_index = cfs->get_u2_fast();
2433 const u4 method_attribute_length = cfs->get_u4_fast();
2434 check_property(
2435 valid_symbol_at(method_attribute_name_index),
2436 "Invalid method attribute name index %u in class file %s",
2437 method_attribute_name_index, CHECK_NULL);
2438
2439 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2440 if (method_attribute_name == vmSymbols::tag_code()) {
2441 // Parse Code attribute
2442 if (_need_verify) {
2443 guarantee_property(
2444 !access_flags.is_native() && !access_flags.is_abstract(),
2445 "Code attribute in native or abstract methods in class file %s",
2446 CHECK_NULL);
2447 }
2448 if (parsed_code_attribute) {
2449 classfile_parse_error("Multiple Code attributes in class file %s",
2450 CHECK_NULL);
2451 }
2452 parsed_code_attribute = true;
2453
2454 // Stack size, locals size, and code size
2455 cfs->guarantee_more(8, CHECK_NULL);
2456 max_stack = cfs->get_u2_fast();
2457 max_locals = cfs->get_u2_fast();
2458 code_length = cfs->get_u4_fast();
2459 if (_need_verify) {
2460 guarantee_property(args_size <= max_locals,
2461 "Arguments can't fit into locals in class file %s",
2462 CHECK_NULL);
2463 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2464 "Invalid method Code length %u in class file %s",
2465 code_length, CHECK_NULL);
2466 }
2467 // Code pointer
2468 code_start = cfs->current();
2469 assert(code_start != NULL, "null code start");
2470 cfs->guarantee_more(code_length, CHECK_NULL);
2471 cfs->skip_u1_fast(code_length);
2472
2473 // Exception handler table
2474 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2475 exception_table_length = cfs->get_u2_fast();
2476 if (exception_table_length > 0) {
2477 exception_table_start = parse_exception_table(cfs,
2478 code_length,
2479 exception_table_length,
2480 CHECK_NULL);
2481 }
2482
2483 // Parse additional attributes in code attribute
2484 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2485 u2 code_attributes_count = cfs->get_u2_fast();
2486
2487 unsigned int calculated_attribute_length = 0;
2488
2489 calculated_attribute_length =
2490 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2491 calculated_attribute_length +=
2492 code_length +
2493 sizeof(exception_table_length) +
2494 sizeof(code_attributes_count) +
2495 exception_table_length *
2496 ( sizeof(u2) + // start_pc
2497 sizeof(u2) + // end_pc
2498 sizeof(u2) + // handler_pc
2499 sizeof(u2) ); // catch_type_index
2500
2501 while (code_attributes_count--) {
2502 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2503 const u2 code_attribute_name_index = cfs->get_u2_fast();
2504 const u4 code_attribute_length = cfs->get_u4_fast();
2505 calculated_attribute_length += code_attribute_length +
2506 sizeof(code_attribute_name_index) +
2507 sizeof(code_attribute_length);
2508 check_property(valid_symbol_at(code_attribute_name_index),
2509 "Invalid code attribute name index %u in class file %s",
2510 code_attribute_name_index,
2511 CHECK_NULL);
2512 if (LoadLineNumberTables &&
2513 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2514 // Parse and compress line number table
2515 parse_linenumber_table(code_attribute_length,
2516 code_length,
2517 &linenumber_table,
2518 CHECK_NULL);
2519
2520 } else if (LoadLocalVariableTables &&
2521 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2522 // Parse local variable table
2523 if (!lvt_allocated) {
2524 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2525 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2526 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2527 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2528 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2529 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2530 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2531 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2532 lvt_allocated = true;
2533 }
2534 if (lvt_cnt == max_lvt_cnt) {
2535 max_lvt_cnt <<= 1;
2536 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2537 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2538 }
2539 localvariable_table_start[lvt_cnt] =
2540 parse_localvariable_table(cfs,
2541 code_length,
2542 max_locals,
2543 code_attribute_length,
2544 &localvariable_table_length[lvt_cnt],
2545 false, // is not LVTT
2546 CHECK_NULL);
2547 total_lvt_length += localvariable_table_length[lvt_cnt];
2548 lvt_cnt++;
2549 } else if (LoadLocalVariableTypeTables &&
2550 _major_version >= JAVA_1_5_VERSION &&
2551 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2552 if (!lvt_allocated) {
2553 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2554 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2555 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2556 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2557 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2558 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2559 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2560 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2561 lvt_allocated = true;
2562 }
2563 // Parse local variable type table
2564 if (lvtt_cnt == max_lvtt_cnt) {
2565 max_lvtt_cnt <<= 1;
2566 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2567 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2568 }
2569 localvariable_type_table_start[lvtt_cnt] =
2570 parse_localvariable_table(cfs,
2571 code_length,
2572 max_locals,
2573 code_attribute_length,
2574 &localvariable_type_table_length[lvtt_cnt],
2575 true, // is LVTT
2576 CHECK_NULL);
2577 lvtt_cnt++;
2578 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2579 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2580 // Stack map is only needed by the new verifier in JDK1.5.
2581 if (parsed_stackmap_attribute) {
2582 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2583 }
2584 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2585 stackmap_data_length = code_attribute_length;
2586 parsed_stackmap_attribute = true;
2587 } else {
2588 // Skip unknown attributes
2589 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2590 }
2591 }
2592 // check method attribute length
2593 if (_need_verify) {
2594 guarantee_property(method_attribute_length == calculated_attribute_length,
2595 "Code segment has wrong length in class file %s",
2596 CHECK_NULL);
2597 }
2598 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2599 // Parse Exceptions attribute
2600 if (parsed_checked_exceptions_attribute) {
2601 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2602 CHECK_NULL);
2603 }
2604 parsed_checked_exceptions_attribute = true;
2605 checked_exceptions_start =
2606 parse_checked_exceptions(cfs,
2607 &checked_exceptions_length,
2608 method_attribute_length,
2609 CHECK_NULL);
2610 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2611 // reject multiple method parameters
2612 if (method_parameters_seen) {
2613 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2614 CHECK_NULL);
2615 }
2616 method_parameters_seen = true;
2617 method_parameters_length = cfs->get_u1_fast();
2618 const u2 real_length = (method_parameters_length * 4u) + 1u;
2619 if (method_attribute_length != real_length) {
2620 classfile_parse_error(
2621 "Invalid MethodParameters method attribute length %u in class file",
2622 method_attribute_length, CHECK_NULL);
2623 }
2624 method_parameters_data = cfs->current();
2625 cfs->skip_u2_fast(method_parameters_length);
2626 cfs->skip_u2_fast(method_parameters_length);
2627 // ignore this attribute if it cannot be reflected
2628 if (!SystemDictionary::Parameter_klass_loaded())
2629 method_parameters_length = -1;
2630 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2631 if (method_attribute_length != 0) {
2632 classfile_parse_error(
2633 "Invalid Synthetic method attribute length %u in class file %s",
2634 method_attribute_length, CHECK_NULL);
2635 }
2636 // Should we check that there hasn't already been a synthetic attribute?
2637 access_flags.set_is_synthetic();
2638 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2639 if (method_attribute_length != 0) {
2640 classfile_parse_error(
2641 "Invalid Deprecated method attribute length %u in class file %s",
2642 method_attribute_length, CHECK_NULL);
2643 }
2644 } else if (_major_version >= JAVA_1_5_VERSION) {
2645 if (method_attribute_name == vmSymbols::tag_signature()) {
2646 if (generic_signature_index != 0) {
2647 classfile_parse_error(
2648 "Multiple Signature attributes for method in class file %s",
2649 CHECK_NULL);
2650 }
2651 if (method_attribute_length != 2) {
2652 classfile_parse_error(
2653 "Invalid Signature attribute length %u in class file %s",
2654 method_attribute_length, CHECK_NULL);
2655 }
2656 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2657 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2658 if (runtime_visible_annotations != NULL) {
2659 classfile_parse_error(
2660 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2661 CHECK_NULL);
2662 }
2663 runtime_visible_annotations_length = method_attribute_length;
2664 runtime_visible_annotations = cfs->current();
2665 assert(runtime_visible_annotations != NULL, "null visible annotations");
2666 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2667 parse_annotations(cp,
2668 runtime_visible_annotations,
2669 runtime_visible_annotations_length,
2670 &parsed_annotations,
2671 _loader_data,
2672 _can_access_vm_annotations,
2673 CHECK_NULL);
2674 cfs->skip_u1_fast(runtime_visible_annotations_length);
2675 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2676 if (runtime_invisible_annotations_exists) {
2677 classfile_parse_error(
2678 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2679 CHECK_NULL);
2680 }
2681 runtime_invisible_annotations_exists = true;
2682 if (PreserveAllAnnotations) {
2683 runtime_invisible_annotations_length = method_attribute_length;
2684 runtime_invisible_annotations = cfs->current();
2685 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2686 }
2687 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2688 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2689 if (runtime_visible_parameter_annotations != NULL) {
2690 classfile_parse_error(
2691 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2692 CHECK_NULL);
2693 }
2694 runtime_visible_parameter_annotations_length = method_attribute_length;
2695 runtime_visible_parameter_annotations = cfs->current();
2696 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2697 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2698 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2699 if (runtime_invisible_parameter_annotations_exists) {
2700 classfile_parse_error(
2701 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2702 CHECK_NULL);
2703 }
2704 runtime_invisible_parameter_annotations_exists = true;
2705 if (PreserveAllAnnotations) {
2706 runtime_invisible_parameter_annotations_length = method_attribute_length;
2707 runtime_invisible_parameter_annotations = cfs->current();
2708 assert(runtime_invisible_parameter_annotations != NULL,
2709 "null invisible parameter annotations");
2710 }
2711 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2712 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2713 if (annotation_default != NULL) {
2714 classfile_parse_error(
2715 "Multiple AnnotationDefault attributes for method in class file %s",
2716 CHECK_NULL);
2717 }
2718 annotation_default_length = method_attribute_length;
2719 annotation_default = cfs->current();
2720 assert(annotation_default != NULL, "null annotation default");
2721 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2722 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2723 if (runtime_visible_type_annotations != NULL) {
2724 classfile_parse_error(
2725 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2726 CHECK_NULL);
2727 }
2728 runtime_visible_type_annotations_length = method_attribute_length;
2729 runtime_visible_type_annotations = cfs->current();
2730 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2731 // No need for the VM to parse Type annotations
2732 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2733 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2734 if (runtime_invisible_type_annotations_exists) {
2735 classfile_parse_error(
2736 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2737 CHECK_NULL);
2738 } else {
2739 runtime_invisible_type_annotations_exists = true;
2740 }
2741 if (PreserveAllAnnotations) {
2742 runtime_invisible_type_annotations_length = method_attribute_length;
2743 runtime_invisible_type_annotations = cfs->current();
2744 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2745 }
2746 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2747 } else {
2748 // Skip unknown attributes
2749 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2750 }
2751 } else {
2752 // Skip unknown attributes
2753 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2754 }
2755 }
2756
2757 if (linenumber_table != NULL) {
2758 linenumber_table->write_terminator();
2759 linenumber_table_length = linenumber_table->position();
2760 }
2761
2762 // Make sure there's at least one Code attribute in non-native/non-abstract method
2763 if (_need_verify) {
2764 guarantee_property(access_flags.is_native() ||
2765 access_flags.is_abstract() ||
2766 parsed_code_attribute,
2767 "Absent Code attribute in method that is not native or abstract in class file %s",
2768 CHECK_NULL);
2769 }
2770
2771 // All sizing information for a Method* is finally available, now create it
2772 InlineTableSizes sizes(
2773 total_lvt_length,
2774 linenumber_table_length,
2775 exception_table_length,
2776 checked_exceptions_length,
2777 method_parameters_length,
2778 generic_signature_index,
2779 runtime_visible_annotations_length +
2780 runtime_invisible_annotations_length,
2781 runtime_visible_parameter_annotations_length +
2782 runtime_invisible_parameter_annotations_length,
2783 runtime_visible_type_annotations_length +
2784 runtime_invisible_type_annotations_length,
2785 annotation_default_length,
2786 0);
2787
2788 Method* const m = Method::allocate(_loader_data,
2789 code_length,
2790 access_flags,
2791 &sizes,
2792 ConstMethod::NORMAL,
2793 CHECK_NULL);
2794
2795 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2796
2797 // Fill in information from fixed part (access_flags already set)
2798 m->set_constants(_cp);
2799 m->set_name_index(name_index);
2800 m->set_signature_index(signature_index);
2801
2802 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2803 m->constMethod()->set_result_type(rtf.type());
2804
2805 if (args_size >= 0) {
2806 m->set_size_of_parameters(args_size);
2807 } else {
2808 m->compute_size_of_parameters(THREAD);
2809 }
2810 #ifdef ASSERT
2811 if (args_size >= 0) {
2812 m->compute_size_of_parameters(THREAD);
2813 assert(args_size == m->size_of_parameters(), "");
2814 }
2815 #endif
2816
2817 // Fill in code attribute information
2818 m->set_max_stack(max_stack);
2819 m->set_max_locals(max_locals);
2820 if (stackmap_data != NULL) {
2821 m->constMethod()->copy_stackmap_data(_loader_data,
2822 (u1*)stackmap_data,
2823 stackmap_data_length,
2824 CHECK_NULL);
2825 }
2826
2827 // Copy byte codes
2828 m->set_code((u1*)code_start);
2829
2830 // Copy line number table
2831 if (linenumber_table != NULL) {
2832 memcpy(m->compressed_linenumber_table(),
2833 linenumber_table->buffer(),
2834 linenumber_table_length);
2835 }
2836
2837 // Copy exception table
2838 if (exception_table_length > 0) {
2839 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2840 m->exception_table_start(),
2841 exception_table_length * sizeof(ExceptionTableElement),
2842 sizeof(u2));
2843 }
2844
2845 // Copy method parameters
2846 if (method_parameters_length > 0) {
2847 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2848 for (int i = 0; i < method_parameters_length; i++) {
2849 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2850 method_parameters_data += 2;
2851 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2852 method_parameters_data += 2;
2853 }
2854 }
2855
2856 // Copy checked exceptions
2857 if (checked_exceptions_length > 0) {
2858 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2859 m->checked_exceptions_start(),
2860 checked_exceptions_length * sizeof(CheckedExceptionElement),
2861 sizeof(u2));
2862 }
2863
2864 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2865 if (total_lvt_length > 0) {
2866 promoted_flags->set_has_localvariable_table();
2867 copy_localvariable_table(m->constMethod(),
2868 lvt_cnt,
2869 localvariable_table_length,
2870 localvariable_table_start,
2871 lvtt_cnt,
2872 localvariable_type_table_length,
2873 localvariable_type_table_start,
2874 CHECK_NULL);
2875 }
2876
2877 if (parsed_annotations.has_any_annotations())
2878 parsed_annotations.apply_to(methodHandle(THREAD, m));
2879
2880 // Copy annotations
2881 copy_method_annotations(m->constMethod(),
2882 runtime_visible_annotations,
2883 runtime_visible_annotations_length,
2884 runtime_invisible_annotations,
2885 runtime_invisible_annotations_length,
2886 runtime_visible_parameter_annotations,
2887 runtime_visible_parameter_annotations_length,
2888 runtime_invisible_parameter_annotations,
2889 runtime_invisible_parameter_annotations_length,
2890 runtime_visible_type_annotations,
2891 runtime_visible_type_annotations_length,
2892 runtime_invisible_type_annotations,
2893 runtime_invisible_type_annotations_length,
2894 annotation_default,
2895 annotation_default_length,
2896 CHECK_NULL);
2897
2898 if (name == vmSymbols::finalize_method_name() &&
2899 signature == vmSymbols::void_method_signature()) {
2900 if (m->is_empty_method()) {
2901 _has_empty_finalizer = true;
2902 } else {
2903 _has_finalizer = true;
2904 }
2905 }
2906 if (name == vmSymbols::object_initializer_name() &&
2907 signature == vmSymbols::void_method_signature() &&
2908 m->is_vanilla_constructor()) {
2909 _has_vanilla_constructor = true;
2910 }
2911
2912 NOT_PRODUCT(m->verify());
2913 return m;
2914 }
2915
2916
2917 // The promoted_flags parameter is used to pass relevant access_flags
2918 // from the methods back up to the containing klass. These flag values
2919 // are added to klass's access_flags.
2920 // Side-effects: populates the _methods field in the parser
2921 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2922 bool is_interface,
2923 AccessFlags* promoted_flags,
2924 bool* has_final_method,
2925 bool* declares_nonstatic_concrete_methods,
2926 TRAPS) {
2927 assert(cfs != NULL, "invariant");
2928 assert(promoted_flags != NULL, "invariant");
2929 assert(has_final_method != NULL, "invariant");
2930 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2931
2932 assert(NULL == _methods, "invariant");
2933
2934 cfs->guarantee_more(2, CHECK); // length
2935 const u2 length = cfs->get_u2_fast();
2936 if (length == 0) {
2937 _methods = Universe::the_empty_method_array();
2938 } else {
2939 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2940 length,
2941 NULL,
2942 CHECK);
2943
2944 for (int index = 0; index < length; index++) {
2945 Method* method = parse_method(cfs,
2946 is_interface,
2947 _cp,
2948 promoted_flags,
2949 CHECK);
2950
2951 if (method->is_final()) {
2952 *has_final_method = true;
2953 }
2954 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2955 // used for interface initialization, and default method inheritance analysis
2956 if (is_interface && !(*declares_nonstatic_concrete_methods)
2957 && !method->is_abstract() && !method->is_static()) {
2958 *declares_nonstatic_concrete_methods = true;
2959 }
2960 _methods->at_put(index, method);
2961 }
2962
2963 if (_need_verify && length > 1) {
2964 // Check duplicated methods
2965 ResourceMark rm(THREAD);
2966 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2967 THREAD, NameSigHash*, HASH_ROW_SIZE);
2968 initialize_hashtable(names_and_sigs);
2969 bool dup = false;
2970 const Symbol* name = NULL;
2971 const Symbol* sig = NULL;
2972 {
2973 debug_only(NoSafepointVerifier nsv;)
2974 for (int i = 0; i < length; i++) {
2975 const Method* const m = _methods->at(i);
2976 name = m->name();
2977 sig = m->signature();
2978 // If no duplicates, add name/signature in hashtable names_and_sigs.
2979 if (!put_after_lookup(name, sig, names_and_sigs)) {
2980 dup = true;
2981 break;
2982 }
2983 }
2984 }
2985 if (dup) {
2986 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2987 name->as_C_string(), sig->as_klass_external_name(), CHECK);
2988 }
2989 }
2990 }
2991 }
2992
2993 static const intArray* sort_methods(Array<Method*>* methods) {
2994 const int length = methods->length();
2995 // If JVMTI original method ordering or sharing is enabled we have to
2996 // remember the original class file ordering.
2997 // We temporarily use the vtable_index field in the Method* to store the
2998 // class file index, so we can read in after calling qsort.
2999 // Put the method ordering in the shared archive.
3000 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3001 for (int index = 0; index < length; index++) {
3002 Method* const m = methods->at(index);
3003 assert(!m->valid_vtable_index(), "vtable index should not be set");
3004 m->set_vtable_index(index);
3005 }
3006 }
3007 // Sort method array by ascending method name (for faster lookups & vtable construction)
3008 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3009 Method::sort_methods(methods);
3010
3011 intArray* method_ordering = NULL;
3012 // If JVMTI original method ordering or sharing is enabled construct int
3013 // array remembering the original ordering
3014 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3015 method_ordering = new intArray(length, length, -1);
3016 for (int index = 0; index < length; index++) {
3017 Method* const m = methods->at(index);
3018 const int old_index = m->vtable_index();
3019 assert(old_index >= 0 && old_index < length, "invalid method index");
3020 method_ordering->at_put(index, old_index);
3021 m->set_vtable_index(Method::invalid_vtable_index);
3022 }
3023 }
3024 return method_ordering;
3025 }
3026
3027 // Parse generic_signature attribute for methods and fields
3028 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3029 TRAPS) {
3030 assert(cfs != NULL, "invariant");
3031
3032 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3033 const u2 generic_signature_index = cfs->get_u2_fast();
3034 check_property(
3035 valid_symbol_at(generic_signature_index),
3036 "Invalid Signature attribute at constant pool index %u in class file %s",
3037 generic_signature_index, CHECK_0);
3038 return generic_signature_index;
3039 }
3040
3041 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3042 TRAPS) {
3043
3044 assert(cfs != NULL, "invariant");
3045
3046 cfs->guarantee_more(2, CHECK); // sourcefile_index
3047 const u2 sourcefile_index = cfs->get_u2_fast();
3048 check_property(
3049 valid_symbol_at(sourcefile_index),
3050 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3051 sourcefile_index, CHECK);
3052 set_class_sourcefile_index(sourcefile_index);
3053 }
3054
3055 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3056 int length,
3057 TRAPS) {
3058 assert(cfs != NULL, "invariant");
3059
3060 const u1* const sde_buffer = cfs->current();
3061 assert(sde_buffer != NULL, "null sde buffer");
3062
3063 // Don't bother storing it if there is no way to retrieve it
3064 if (JvmtiExport::can_get_source_debug_extension()) {
3065 assert((length+1) > length, "Overflow checking");
3066 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3067 for (int i = 0; i < length; i++) {
3068 sde[i] = sde_buffer[i];
3069 }
3070 sde[length] = '\0';
3071 set_class_sde_buffer((const char*)sde, length);
3072 }
3073 // Got utf8 string, set stream position forward
3074 cfs->skip_u1(length, CHECK);
3075 }
3076
3077
3078 // Inner classes can be static, private or protected (classic VM does this)
3079 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3080 JVM_ACC_PRIVATE | \
3081 JVM_ACC_PROTECTED | \
3082 JVM_ACC_STATIC \
3083 )
3084
3085 // Return number of classes in the inner classes attribute table
3086 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3087 const u1* const inner_classes_attribute_start,
3088 bool parsed_enclosingmethod_attribute,
3089 u2 enclosing_method_class_index,
3090 u2 enclosing_method_method_index,
3091 TRAPS) {
3092 const u1* const current_mark = cfs->current();
3093 u2 length = 0;
3094 if (inner_classes_attribute_start != NULL) {
3095 cfs->set_current(inner_classes_attribute_start);
3096 cfs->guarantee_more(2, CHECK_0); // length
3097 length = cfs->get_u2_fast();
3098 }
3099
3100 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3101 // method data:
3102 // [inner_class_info_index,
3103 // outer_class_info_index,
3104 // inner_name_index,
3105 // inner_class_access_flags,
3106 // ...
3107 // enclosing_method_class_index,
3108 // enclosing_method_method_index]
3109 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3110 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3111 _inner_classes = inner_classes;
3112
3113 int index = 0;
3114 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3115 for (int n = 0; n < length; n++) {
3116 // Inner class index
3117 const u2 inner_class_info_index = cfs->get_u2_fast();
3118 check_property(
3119 valid_klass_reference_at(inner_class_info_index),
3120 "inner_class_info_index %u has bad constant type in class file %s",
3121 inner_class_info_index, CHECK_0);
3122 // Outer class index
3123 const u2 outer_class_info_index = cfs->get_u2_fast();
3124 check_property(
3125 outer_class_info_index == 0 ||
3126 valid_klass_reference_at(outer_class_info_index),
3127 "outer_class_info_index %u has bad constant type in class file %s",
3128 outer_class_info_index, CHECK_0);
3129 // Inner class name
3130 const u2 inner_name_index = cfs->get_u2_fast();
3131 check_property(
3132 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3133 "inner_name_index %u has bad constant type in class file %s",
3134 inner_name_index, CHECK_0);
3135 if (_need_verify) {
3136 guarantee_property(inner_class_info_index != outer_class_info_index,
3137 "Class is both outer and inner class in class file %s", CHECK_0);
3138 }
3139 // Access flags
3140 jint flags;
3141 // JVM_ACC_MODULE is defined in JDK-9 and later.
3142 if (_major_version >= JAVA_9_VERSION) {
3143 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3144 } else {
3145 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3146 }
3147 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3148 // Set abstract bit for old class files for backward compatibility
3149 flags |= JVM_ACC_ABSTRACT;
3150 }
3151 verify_legal_class_modifiers(flags, CHECK_0);
3152 AccessFlags inner_access_flags(flags);
3153
3154 inner_classes->at_put(index++, inner_class_info_index);
3155 inner_classes->at_put(index++, outer_class_info_index);
3156 inner_classes->at_put(index++, inner_name_index);
3157 inner_classes->at_put(index++, inner_access_flags.as_short());
3158 }
3159
3160 // 4347400: make sure there's no duplicate entry in the classes array
3161 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3162 for(int i = 0; i < length * 4; i += 4) {
3163 for(int j = i + 4; j < length * 4; j += 4) {
3164 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3165 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3166 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3167 inner_classes->at(i+3) != inner_classes->at(j+3)),
3168 "Duplicate entry in InnerClasses in class file %s",
3169 CHECK_0);
3170 }
3171 }
3172 }
3173
3174 // Set EnclosingMethod class and method indexes.
3175 if (parsed_enclosingmethod_attribute) {
3176 inner_classes->at_put(index++, enclosing_method_class_index);
3177 inner_classes->at_put(index++, enclosing_method_method_index);
3178 }
3179 assert(index == size, "wrong size");
3180
3181 // Restore buffer's current position.
3182 cfs->set_current(current_mark);
3183
3184 return length;
3185 }
3186
3187 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3188 const u1* const nest_members_attribute_start,
3189 TRAPS) {
3190 const u1* const current_mark = cfs->current();
3191 u2 length = 0;
3192 if (nest_members_attribute_start != NULL) {
3193 cfs->set_current(nest_members_attribute_start);
3194 cfs->guarantee_more(2, CHECK_0); // length
3195 length = cfs->get_u2_fast();
3196 }
3197 const int size = length;
3198 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3199 _nest_members = nest_members;
3200
3201 int index = 0;
3202 cfs->guarantee_more(2 * length, CHECK_0);
3203 for (int n = 0; n < length; n++) {
3204 const u2 class_info_index = cfs->get_u2_fast();
3205 check_property(
3206 valid_klass_reference_at(class_info_index),
3207 "Nest member class_info_index %u has bad constant type in class file %s",
3208 class_info_index, CHECK_0);
3209 nest_members->at_put(index++, class_info_index);
3210 }
3211 assert(index == size, "wrong size");
3212
3213 // Restore buffer's current position.
3214 cfs->set_current(current_mark);
3215
3216 return length;
3217 }
3218
3219 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3220 set_class_synthetic_flag(true);
3221 }
3222
3223 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3224 assert(cfs != NULL, "invariant");
3225
3226 const u2 signature_index = cfs->get_u2(CHECK);
3227 check_property(
3228 valid_symbol_at(signature_index),
3229 "Invalid constant pool index %u in Signature attribute in class file %s",
3230 signature_index, CHECK);
3231 set_class_generic_signature_index(signature_index);
3232 }
3233
3234 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3235 ConstantPool* cp,
3236 u4 attribute_byte_length,
3237 TRAPS) {
3238 assert(cfs != NULL, "invariant");
3239 assert(cp != NULL, "invariant");
3240
3241 const u1* const current_start = cfs->current();
3242
3243 guarantee_property(attribute_byte_length >= sizeof(u2),
3244 "Invalid BootstrapMethods attribute length %u in class file %s",
3245 attribute_byte_length,
3246 CHECK);
3247
3248 cfs->guarantee_more(attribute_byte_length, CHECK);
3249
3250 const int attribute_array_length = cfs->get_u2_fast();
3251
3252 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3253 "Short length on BootstrapMethods in class file %s",
3254 CHECK);
3255
3256
3257 // The attribute contains a counted array of counted tuples of shorts,
3258 // represending bootstrap specifiers:
3259 // length*{bootstrap_method_index, argument_count*{argument_index}}
3260 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3261 // operand_count = number of shorts in attr, except for leading length
3262
3263 // The attribute is copied into a short[] array.
3264 // The array begins with a series of short[2] pairs, one for each tuple.
3265 const int index_size = (attribute_array_length * 2);
3266
3267 Array<u2>* const operands =
3268 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3269
3270 // Eagerly assign operands so they will be deallocated with the constant
3271 // pool if there is an error.
3272 cp->set_operands(operands);
3273
3274 int operand_fill_index = index_size;
3275 const int cp_size = cp->length();
3276
3277 for (int n = 0; n < attribute_array_length; n++) {
3278 // Store a 32-bit offset into the header of the operand array.
3279 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3280
3281 // Read a bootstrap specifier.
3282 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3283 const u2 bootstrap_method_index = cfs->get_u2_fast();
3284 const u2 argument_count = cfs->get_u2_fast();
3285 check_property(
3286 valid_cp_range(bootstrap_method_index, cp_size) &&
3287 cp->tag_at(bootstrap_method_index).is_method_handle(),
3288 "bootstrap_method_index %u has bad constant type in class file %s",
3289 bootstrap_method_index,
3290 CHECK);
3291
3292 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3293 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3294 CHECK);
3295
3296 operands->at_put(operand_fill_index++, bootstrap_method_index);
3297 operands->at_put(operand_fill_index++, argument_count);
3298
3299 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3300 for (int j = 0; j < argument_count; j++) {
3301 const u2 argument_index = cfs->get_u2_fast();
3302 check_property(
3303 valid_cp_range(argument_index, cp_size) &&
3304 cp->tag_at(argument_index).is_loadable_constant(),
3305 "argument_index %u has bad constant type in class file %s",
3306 argument_index,
3307 CHECK);
3308 operands->at_put(operand_fill_index++, argument_index);
3309 }
3310 }
3311 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3312 "Bad length on BootstrapMethods in class file %s",
3313 CHECK);
3314 }
3315
3316 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3317 ConstantPool* cp,
3318 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3319 TRAPS) {
3320 assert(cfs != NULL, "invariant");
3321 assert(cp != NULL, "invariant");
3322 assert(parsed_annotations != NULL, "invariant");
3323
3324 // Set inner classes attribute to default sentinel
3325 _inner_classes = Universe::the_empty_short_array();
3326 // Set nest members attribute to default sentinel
3327 _nest_members = Universe::the_empty_short_array();
3328 cfs->guarantee_more(2, CHECK); // attributes_count
3329 u2 attributes_count = cfs->get_u2_fast();
3330 bool parsed_sourcefile_attribute = false;
3331 bool parsed_innerclasses_attribute = false;
3332 bool parsed_nest_members_attribute = false;
3333 bool parsed_nest_host_attribute = false;
3334 bool parsed_enclosingmethod_attribute = false;
3335 bool parsed_bootstrap_methods_attribute = false;
3336 const u1* runtime_visible_annotations = NULL;
3337 int runtime_visible_annotations_length = 0;
3338 const u1* runtime_invisible_annotations = NULL;
3339 int runtime_invisible_annotations_length = 0;
3340 const u1* runtime_visible_type_annotations = NULL;
3341 int runtime_visible_type_annotations_length = 0;
3342 const u1* runtime_invisible_type_annotations = NULL;
3343 int runtime_invisible_type_annotations_length = 0;
3344 bool runtime_invisible_type_annotations_exists = false;
3345 bool runtime_invisible_annotations_exists = false;
3346 bool parsed_source_debug_ext_annotations_exist = false;
3347 const u1* inner_classes_attribute_start = NULL;
3348 u4 inner_classes_attribute_length = 0;
3349 u2 enclosing_method_class_index = 0;
3350 u2 enclosing_method_method_index = 0;
3351 const u1* nest_members_attribute_start = NULL;
3352 u4 nest_members_attribute_length = 0;
3353
3354 // Iterate over attributes
3355 while (attributes_count--) {
3356 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3357 const u2 attribute_name_index = cfs->get_u2_fast();
3358 const u4 attribute_length = cfs->get_u4_fast();
3359 check_property(
3360 valid_symbol_at(attribute_name_index),
3361 "Attribute name has bad constant pool index %u in class file %s",
3362 attribute_name_index, CHECK);
3363 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3364 if (tag == vmSymbols::tag_source_file()) {
3365 // Check for SourceFile tag
3366 if (_need_verify) {
3367 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3368 }
3369 if (parsed_sourcefile_attribute) {
3370 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3371 } else {
3372 parsed_sourcefile_attribute = true;
3373 }
3374 parse_classfile_sourcefile_attribute(cfs, CHECK);
3375 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3376 // Check for SourceDebugExtension tag
3377 if (parsed_source_debug_ext_annotations_exist) {
3378 classfile_parse_error(
3379 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3380 }
3381 parsed_source_debug_ext_annotations_exist = true;
3382 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3383 } else if (tag == vmSymbols::tag_inner_classes()) {
3384 // Check for InnerClasses tag
3385 if (parsed_innerclasses_attribute) {
3386 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3387 } else {
3388 parsed_innerclasses_attribute = true;
3389 }
3390 inner_classes_attribute_start = cfs->current();
3391 inner_classes_attribute_length = attribute_length;
3392 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3393 } else if (tag == vmSymbols::tag_synthetic()) {
3394 // Check for Synthetic tag
3395 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3396 if (attribute_length != 0) {
3397 classfile_parse_error(
3398 "Invalid Synthetic classfile attribute length %u in class file %s",
3399 attribute_length, CHECK);
3400 }
3401 parse_classfile_synthetic_attribute(CHECK);
3402 } else if (tag == vmSymbols::tag_deprecated()) {
3403 // Check for Deprecatd tag - 4276120
3404 if (attribute_length != 0) {
3405 classfile_parse_error(
3406 "Invalid Deprecated classfile attribute length %u in class file %s",
3407 attribute_length, CHECK);
3408 }
3409 } else if (_major_version >= JAVA_1_5_VERSION) {
3410 if (tag == vmSymbols::tag_signature()) {
3411 if (_generic_signature_index != 0) {
3412 classfile_parse_error(
3413 "Multiple Signature attributes in class file %s", CHECK);
3414 }
3415 if (attribute_length != 2) {
3416 classfile_parse_error(
3417 "Wrong Signature attribute length %u in class file %s",
3418 attribute_length, CHECK);
3419 }
3420 parse_classfile_signature_attribute(cfs, CHECK);
3421 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3422 if (runtime_visible_annotations != NULL) {
3423 classfile_parse_error(
3424 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3425 }
3426 runtime_visible_annotations_length = attribute_length;
3427 runtime_visible_annotations = cfs->current();
3428 assert(runtime_visible_annotations != NULL, "null visible annotations");
3429 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3430 parse_annotations(cp,
3431 runtime_visible_annotations,
3432 runtime_visible_annotations_length,
3433 parsed_annotations,
3434 _loader_data,
3435 _can_access_vm_annotations,
3436 CHECK);
3437 cfs->skip_u1_fast(runtime_visible_annotations_length);
3438 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3439 if (runtime_invisible_annotations_exists) {
3440 classfile_parse_error(
3441 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3442 }
3443 runtime_invisible_annotations_exists = true;
3444 if (PreserveAllAnnotations) {
3445 runtime_invisible_annotations_length = attribute_length;
3446 runtime_invisible_annotations = cfs->current();
3447 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3448 }
3449 cfs->skip_u1(attribute_length, CHECK);
3450 } else if (tag == vmSymbols::tag_enclosing_method()) {
3451 if (parsed_enclosingmethod_attribute) {
3452 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3453 } else {
3454 parsed_enclosingmethod_attribute = true;
3455 }
3456 guarantee_property(attribute_length == 4,
3457 "Wrong EnclosingMethod attribute length %u in class file %s",
3458 attribute_length, CHECK);
3459 cfs->guarantee_more(4, CHECK); // class_index, method_index
3460 enclosing_method_class_index = cfs->get_u2_fast();
3461 enclosing_method_method_index = cfs->get_u2_fast();
3462 if (enclosing_method_class_index == 0) {
3463 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3464 }
3465 // Validate the constant pool indices and types
3466 check_property(valid_klass_reference_at(enclosing_method_class_index),
3467 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3468 if (enclosing_method_method_index != 0 &&
3469 (!cp->is_within_bounds(enclosing_method_method_index) ||
3470 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3471 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3472 }
3473 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3474 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3475 if (parsed_bootstrap_methods_attribute) {
3476 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3477 }
3478 parsed_bootstrap_methods_attribute = true;
3479 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3480 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3481 if (runtime_visible_type_annotations != NULL) {
3482 classfile_parse_error(
3483 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3484 }
3485 runtime_visible_type_annotations_length = attribute_length;
3486 runtime_visible_type_annotations = cfs->current();
3487 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3488 // No need for the VM to parse Type annotations
3489 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3490 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3491 if (runtime_invisible_type_annotations_exists) {
3492 classfile_parse_error(
3493 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3494 } else {
3495 runtime_invisible_type_annotations_exists = true;
3496 }
3497 if (PreserveAllAnnotations) {
3498 runtime_invisible_type_annotations_length = attribute_length;
3499 runtime_invisible_type_annotations = cfs->current();
3500 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3501 }
3502 cfs->skip_u1(attribute_length, CHECK);
3503 } else if (_major_version >= JAVA_11_VERSION) {
3504 if (tag == vmSymbols::tag_nest_members()) {
3505 // Check for NestMembers tag
3506 if (parsed_nest_members_attribute) {
3507 classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3508 } else {
3509 parsed_nest_members_attribute = true;
3510 }
3511 if (parsed_nest_host_attribute) {
3512 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3513 }
3514 nest_members_attribute_start = cfs->current();
3515 nest_members_attribute_length = attribute_length;
3516 cfs->skip_u1(nest_members_attribute_length, CHECK);
3517 } else if (tag == vmSymbols::tag_nest_host()) {
3518 if (parsed_nest_host_attribute) {
3519 classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3520 } else {
3521 parsed_nest_host_attribute = true;
3522 }
3523 if (parsed_nest_members_attribute) {
3524 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3525 }
3526 if (_need_verify) {
3527 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3528 }
3529 cfs->guarantee_more(2, CHECK);
3530 u2 class_info_index = cfs->get_u2_fast();
3531 check_property(
3532 valid_klass_reference_at(class_info_index),
3533 "Nest-host class_info_index %u has bad constant type in class file %s",
3534 class_info_index, CHECK);
3535 _nest_host = class_info_index;
3536 } else {
3537 // Unknown attribute
3538 cfs->skip_u1(attribute_length, CHECK);
3539 }
3540 } else {
3541 // Unknown attribute
3542 cfs->skip_u1(attribute_length, CHECK);
3543 }
3544 } else {
3545 // Unknown attribute
3546 cfs->skip_u1(attribute_length, CHECK);
3547 }
3548 }
3549 _class_annotations = assemble_annotations(runtime_visible_annotations,
3550 runtime_visible_annotations_length,
3551 runtime_invisible_annotations,
3552 runtime_invisible_annotations_length,
3553 CHECK);
3554 _class_type_annotations = assemble_annotations(runtime_visible_type_annotations,
3555 runtime_visible_type_annotations_length,
3556 runtime_invisible_type_annotations,
3557 runtime_invisible_type_annotations_length,
3558 CHECK);
3559
3560 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3561 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3562 cfs,
3563 inner_classes_attribute_start,
3564 parsed_innerclasses_attribute,
3565 enclosing_method_class_index,
3566 enclosing_method_method_index,
3567 CHECK);
3568 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3569 guarantee_property(
3570 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3571 "Wrong InnerClasses attribute length in class file %s", CHECK);
3572 }
3573 }
3574
3575 if (parsed_nest_members_attribute) {
3576 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3577 cfs,
3578 nest_members_attribute_start,
3579 CHECK);
3580 if (_need_verify) {
3581 guarantee_property(
3582 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3583 "Wrong NestMembers attribute length in class file %s", CHECK);
3584 }
3585 }
3586
3587 if (_max_bootstrap_specifier_index >= 0) {
3588 guarantee_property(parsed_bootstrap_methods_attribute,
3589 "Missing BootstrapMethods attribute in class file %s", CHECK);
3590 }
3591 }
3592
3593 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3594 assert(k != NULL, "invariant");
3595
3596 if (_synthetic_flag)
3597 k->set_is_synthetic();
3598 if (_sourcefile_index != 0) {
3599 k->set_source_file_name_index(_sourcefile_index);
3600 }
3601 if (_generic_signature_index != 0) {
3602 k->set_generic_signature_index(_generic_signature_index);
3603 }
3604 if (_sde_buffer != NULL) {
3605 k->set_source_debug_extension(_sde_buffer, _sde_length);
3606 }
3607 }
3608
3609 // Create the Annotations object that will
3610 // hold the annotations array for the Klass.
3611 void ClassFileParser::create_combined_annotations(TRAPS) {
3612 if (_class_annotations == NULL &&
3613 _class_type_annotations == NULL &&
3614 _fields_annotations == NULL &&
3615 _fields_type_annotations == NULL) {
3616 // Don't create the Annotations object unnecessarily.
3617 return;
3618 }
3619
3620 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3621 annotations->set_class_annotations(_class_annotations);
3622 annotations->set_class_type_annotations(_class_type_annotations);
3623 annotations->set_fields_annotations(_fields_annotations);
3624 annotations->set_fields_type_annotations(_fields_type_annotations);
3625
3626 // This is the Annotations object that will be
3627 // assigned to InstanceKlass being constructed.
3628 _combined_annotations = annotations;
3629
3630 // The annotations arrays below has been transfered the
3631 // _combined_annotations so these fields can now be cleared.
3632 _class_annotations = NULL;
3633 _class_type_annotations = NULL;
3634 _fields_annotations = NULL;
3635 _fields_type_annotations = NULL;
3636 }
3637
3638 // Transfer ownership of metadata allocated to the InstanceKlass.
3639 void ClassFileParser::apply_parsed_class_metadata(
3640 InstanceKlass* this_klass,
3641 int java_fields_count, TRAPS) {
3642 assert(this_klass != NULL, "invariant");
3643
3644 _cp->set_pool_holder(this_klass);
3645 this_klass->set_constants(_cp);
3646 this_klass->set_fields(_fields, java_fields_count);
3647 this_klass->set_methods(_methods);
3648 this_klass->set_inner_classes(_inner_classes);
3649 this_klass->set_nest_members(_nest_members);
3650 this_klass->set_nest_host_index(_nest_host);
3651 this_klass->set_local_interfaces(_local_interfaces);
3652 this_klass->set_annotations(_combined_annotations);
3653 // Delay the setting of _transitive_interfaces until after initialize_supers() in
3654 // fill_instance_klass(). It is because the _transitive_interfaces may be shared with
3655 // its _super. If an OOM occurs while loading the current klass, its _super field
3656 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3657 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3658 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3659
3660 // Clear out these fields so they don't get deallocated by the destructor
3661 clear_class_metadata();
3662 }
3663
3664 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3665 int runtime_visible_annotations_length,
3666 const u1* const runtime_invisible_annotations,
3667 int runtime_invisible_annotations_length,
3668 TRAPS) {
3669 AnnotationArray* annotations = NULL;
3670 if (runtime_visible_annotations != NULL ||
3671 runtime_invisible_annotations != NULL) {
3672 annotations = MetadataFactory::new_array<u1>(_loader_data,
3673 runtime_visible_annotations_length +
3674 runtime_invisible_annotations_length,
3675 CHECK_(annotations));
3676 if (runtime_visible_annotations != NULL) {
3677 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3678 annotations->at_put(i, runtime_visible_annotations[i]);
3679 }
3680 }
3681 if (runtime_invisible_annotations != NULL) {
3682 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3683 int append = runtime_visible_annotations_length+i;
3684 annotations->at_put(append, runtime_invisible_annotations[i]);
3685 }
3686 }
3687 }
3688 return annotations;
3689 }
3690
3691 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3692 const int super_class_index,
3693 const bool need_verify,
3694 TRAPS) {
3695 assert(cp != NULL, "invariant");
3696 const InstanceKlass* super_klass = NULL;
3697
3698 if (super_class_index == 0) {
3699 check_property(_class_name == vmSymbols::java_lang_Object(),
3700 "Invalid superclass index %u in class file %s",
3701 super_class_index,
3702 CHECK_NULL);
3703 } else {
3704 check_property(valid_klass_reference_at(super_class_index),
3705 "Invalid superclass index %u in class file %s",
3706 super_class_index,
3707 CHECK_NULL);
3708 // The class name should be legal because it is checked when parsing constant pool.
3709 // However, make sure it is not an array type.
3710 bool is_array = false;
3711 if (cp->tag_at(super_class_index).is_klass()) {
3712 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3713 if (need_verify)
3714 is_array = super_klass->is_array_klass();
3715 } else if (need_verify) {
3716 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3717 }
3718 if (need_verify) {
3719 guarantee_property(!is_array,
3720 "Bad superclass name in class file %s", CHECK_NULL);
3721 }
3722 }
3723 return super_klass;
3724 }
3725
3726 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3727 unsigned int nonstatic_oop_map_count,
3728 int first_nonstatic_oop_offset) {
3729
3730 unsigned int map_count =
3731 NULL == super ? 0 : super->nonstatic_oop_map_count();
3732 if (nonstatic_oop_map_count > 0) {
3733 // We have oops to add to map
3734 if (map_count == 0) {
3735 map_count = nonstatic_oop_map_count;
3736 }
3737 else {
3738 // Check whether we should add a new map block or whether the last one can
3739 // be extended
3740 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3741 const OopMapBlock* const last_map = first_map + map_count - 1;
3742
3743 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3744 if (next_offset == first_nonstatic_oop_offset) {
3745 // There is no gap bettwen superklass's last oop field and first
3746 // local oop field, merge maps.
3747 nonstatic_oop_map_count -= 1;
3748 }
3749 else {
3750 // Superklass didn't end with a oop field, add extra maps
3751 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3752 }
3753 map_count += nonstatic_oop_map_count;
3754 }
3755 }
3756 return map_count;
3757 }
3758
3759 #ifndef PRODUCT
3760 static void print_field_layout(const Symbol* name,
3761 Array<u2>* fields,
3762 ConstantPool* cp,
3763 int instance_size,
3764 int instance_fields_start,
3765 int instance_fields_end,
3766 int static_fields_end) {
3767
3768 assert(name != NULL, "invariant");
3769
3770 tty->print("%s: field layout\n", name->as_klass_external_name());
3771 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3772 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3773 if (!fs.access_flags().is_static()) {
3774 tty->print(" @%3d \"%s\" %s\n",
3775 fs.offset(),
3776 fs.name()->as_klass_external_name(),
3777 fs.signature()->as_klass_external_name());
3778 }
3779 }
3780 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3781 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3782 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3783 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3784 if (fs.access_flags().is_static()) {
3785 tty->print(" @%3d \"%s\" %s\n",
3786 fs.offset(),
3787 fs.name()->as_klass_external_name(),
3788 fs.signature()->as_klass_external_name());
3789 }
3790 }
3791 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3792 tty->print("\n");
3793 }
3794 #endif
3795
3796 // Values needed for oopmap and InstanceKlass creation
3797 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3798 public:
3799 int* nonstatic_oop_offsets;
3800 unsigned int* nonstatic_oop_counts;
3801 unsigned int nonstatic_oop_map_count;
3802 unsigned int total_oop_map_count;
3803 int instance_size;
3804 int nonstatic_field_size;
3805 int static_field_size;
3806 bool has_nonstatic_fields;
3807 };
3808
3809 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3810 void ClassFileParser::layout_fields(ConstantPool* cp,
3811 const FieldAllocationCount* fac,
3812 const ClassAnnotationCollector* parsed_annotations,
3813 FieldLayoutInfo* info,
3814 TRAPS) {
3815
3816 assert(cp != NULL, "invariant");
3817
3818 // Field size and offset computation
3819 int nonstatic_field_size = _super_klass == NULL ? 0 :
3820 _super_klass->nonstatic_field_size();
3821
3822 // Count the contended fields by type.
3823 //
3824 // We ignore static fields, because @Contended is not supported for them.
3825 // The layout code below will also ignore the static fields.
3826 int nonstatic_contended_count = 0;
3827 FieldAllocationCount fac_contended;
3828 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3829 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3830 if (fs.is_contended()) {
3831 fac_contended.count[atype]++;
3832 if (!fs.access_flags().is_static()) {
3833 nonstatic_contended_count++;
3834 }
3835 }
3836 }
3837
3838
3839 // Calculate the starting byte offsets
3840 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3841 int next_static_double_offset = next_static_oop_offset +
3842 ((fac->count[STATIC_OOP]) * heapOopSize);
3843 if (fac->count[STATIC_DOUBLE]) {
3844 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3845 }
3846
3847 int next_static_word_offset = next_static_double_offset +
3848 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3849 int next_static_short_offset = next_static_word_offset +
3850 ((fac->count[STATIC_WORD]) * BytesPerInt);
3851 int next_static_byte_offset = next_static_short_offset +
3852 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3853
3854 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3855 nonstatic_field_size * heapOopSize;
3856
3857 int next_nonstatic_field_offset = nonstatic_fields_start;
3858
3859 const bool is_contended_class = parsed_annotations->is_contended();
3860
3861 // Class is contended, pad before all the fields
3862 if (is_contended_class) {
3863 next_nonstatic_field_offset += ContendedPaddingWidth;
3864 }
3865
3866 // Compute the non-contended fields count.
3867 // The packing code below relies on these counts to determine if some field
3868 // can be squeezed into the alignment gap. Contended fields are obviously
3869 // exempt from that.
3870 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3871 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3872 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3873 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3874 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3875
3876 // Total non-static fields count, including every contended field
3877 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3878 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3879 fac->count[NONSTATIC_OOP];
3880
3881 const bool super_has_nonstatic_fields =
3882 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3883 const bool has_nonstatic_fields =
3884 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3885
3886
3887 // Prepare list of oops for oop map generation.
3888 //
3889 // "offset" and "count" lists are describing the set of contiguous oop
3890 // regions. offset[i] is the start of the i-th region, which then has
3891 // count[i] oops following. Before we know how many regions are required,
3892 // we pessimistically allocate the maps to fit all the oops into the
3893 // distinct regions.
3894 //
3895 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3896 // to figure out if we still need to do this.
3897 unsigned int nonstatic_oop_map_count = 0;
3898 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3899
3900 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3901 THREAD, int, max_nonstatic_oop_maps);
3902 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3903 THREAD, unsigned int, max_nonstatic_oop_maps);
3904
3905 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3906
3907 bool compact_fields = CompactFields;
3908 int allocation_style = FieldsAllocationStyle;
3909 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3910 assert(false, "0 <= FieldsAllocationStyle <= 2");
3911 allocation_style = 1; // Optimistic
3912 }
3913
3914 // The next classes have predefined hard-coded fields offsets
3915 // (see in JavaClasses::compute_hard_coded_offsets()).
3916 // Use default fields allocation order for them.
3917 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3918 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3919 _class_name == vmSymbols::java_lang_Class() ||
3920 _class_name == vmSymbols::java_lang_ClassLoader() ||
3921 _class_name == vmSymbols::java_lang_ref_Reference() ||
3922 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3923 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3924 _class_name == vmSymbols::java_lang_String() ||
3925 _class_name == vmSymbols::java_lang_Throwable() ||
3926 _class_name == vmSymbols::java_lang_Boolean() ||
3927 _class_name == vmSymbols::java_lang_Character() ||
3928 _class_name == vmSymbols::java_lang_Float() ||
3929 _class_name == vmSymbols::java_lang_Double() ||
3930 _class_name == vmSymbols::java_lang_Byte() ||
3931 _class_name == vmSymbols::java_lang_Short() ||
3932 _class_name == vmSymbols::java_lang_Integer() ||
3933 _class_name == vmSymbols::java_lang_Long())) {
3934 allocation_style = 0; // Allocate oops first
3935 compact_fields = false; // Don't compact fields
3936 }
3937
3938 int next_nonstatic_oop_offset = 0;
3939 int next_nonstatic_double_offset = 0;
3940
3941 // Rearrange fields for a given allocation style
3942 if( allocation_style == 0 ) {
3943 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3944 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3945 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3946 (nonstatic_oop_count * heapOopSize);
3947 } else if( allocation_style == 1 ) {
3948 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3949 next_nonstatic_double_offset = next_nonstatic_field_offset;
3950 } else if( allocation_style == 2 ) {
3951 // Fields allocation: oops fields in super and sub classes are together.
3952 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3953 _super_klass->nonstatic_oop_map_size() > 0 ) {
3954 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3955 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3956 const OopMapBlock* const last_map = first_map + map_count - 1;
3957 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3958 if (next_offset == next_nonstatic_field_offset) {
3959 allocation_style = 0; // allocate oops first
3960 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3961 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3962 (nonstatic_oop_count * heapOopSize);
3963 }
3964 }
3965 if( allocation_style == 2 ) {
3966 allocation_style = 1; // allocate oops last
3967 next_nonstatic_double_offset = next_nonstatic_field_offset;
3968 }
3969 } else {
3970 ShouldNotReachHere();
3971 }
3972
3973 int nonstatic_oop_space_count = 0;
3974 int nonstatic_word_space_count = 0;
3975 int nonstatic_short_space_count = 0;
3976 int nonstatic_byte_space_count = 0;
3977 int nonstatic_oop_space_offset = 0;
3978 int nonstatic_word_space_offset = 0;
3979 int nonstatic_short_space_offset = 0;
3980 int nonstatic_byte_space_offset = 0;
3981
3982 // Try to squeeze some of the fields into the gaps due to
3983 // long/double alignment.
3984 if (nonstatic_double_count > 0) {
3985 int offset = next_nonstatic_double_offset;
3986 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
3987 if (compact_fields && offset != next_nonstatic_double_offset) {
3988 // Allocate available fields into the gap before double field.
3989 int length = next_nonstatic_double_offset - offset;
3990 assert(length == BytesPerInt, "");
3991 nonstatic_word_space_offset = offset;
3992 if (nonstatic_word_count > 0) {
3993 nonstatic_word_count -= 1;
3994 nonstatic_word_space_count = 1; // Only one will fit
3995 length -= BytesPerInt;
3996 offset += BytesPerInt;
3997 }
3998 nonstatic_short_space_offset = offset;
3999 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4000 nonstatic_short_count -= 1;
4001 nonstatic_short_space_count += 1;
4002 length -= BytesPerShort;
4003 offset += BytesPerShort;
4004 }
4005 nonstatic_byte_space_offset = offset;
4006 while (length > 0 && nonstatic_byte_count > 0) {
4007 nonstatic_byte_count -= 1;
4008 nonstatic_byte_space_count += 1;
4009 length -= 1;
4010 }
4011 // Allocate oop field in the gap if there are no other fields for that.
4012 nonstatic_oop_space_offset = offset;
4013 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4014 allocation_style != 0) { // when oop fields not first
4015 nonstatic_oop_count -= 1;
4016 nonstatic_oop_space_count = 1; // Only one will fit
4017 length -= heapOopSize;
4018 offset += heapOopSize;
4019 }
4020 }
4021 }
4022
4023 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4024 (nonstatic_double_count * BytesPerLong);
4025 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4026 (nonstatic_word_count * BytesPerInt);
4027 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4028 (nonstatic_short_count * BytesPerShort);
4029 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4030 nonstatic_byte_count;
4031
4032 // let oops jump before padding with this allocation style
4033 if( allocation_style == 1 ) {
4034 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4035 if( nonstatic_oop_count > 0 ) {
4036 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4037 }
4038 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4039 }
4040
4041 // Iterate over fields again and compute correct offsets.
4042 // The field allocation type was temporarily stored in the offset slot.
4043 // oop fields are located before non-oop fields (static and non-static).
4044 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4045
4046 // skip already laid out fields
4047 if (fs.is_offset_set()) continue;
4048
4049 // contended instance fields are handled below
4050 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4051
4052 int real_offset = 0;
4053 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4054
4055 // pack the rest of the fields
4056 switch (atype) {
4057 case STATIC_OOP:
4058 real_offset = next_static_oop_offset;
4059 next_static_oop_offset += heapOopSize;
4060 break;
4061 case STATIC_BYTE:
4062 real_offset = next_static_byte_offset;
4063 next_static_byte_offset += 1;
4064 break;
4065 case STATIC_SHORT:
4066 real_offset = next_static_short_offset;
4067 next_static_short_offset += BytesPerShort;
4068 break;
4069 case STATIC_WORD:
4070 real_offset = next_static_word_offset;
4071 next_static_word_offset += BytesPerInt;
4072 break;
4073 case STATIC_DOUBLE:
4074 real_offset = next_static_double_offset;
4075 next_static_double_offset += BytesPerLong;
4076 break;
4077 case NONSTATIC_OOP:
4078 if( nonstatic_oop_space_count > 0 ) {
4079 real_offset = nonstatic_oop_space_offset;
4080 nonstatic_oop_space_offset += heapOopSize;
4081 nonstatic_oop_space_count -= 1;
4082 } else {
4083 real_offset = next_nonstatic_oop_offset;
4084 next_nonstatic_oop_offset += heapOopSize;
4085 }
4086
4087 // Record this oop in the oop maps
4088 if( nonstatic_oop_map_count > 0 &&
4089 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4090 real_offset -
4091 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4092 heapOopSize ) {
4093 // This oop is adjacent to the previous one, add to current oop map
4094 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4095 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4096 } else {
4097 // This oop is not adjacent to the previous one, create new oop map
4098 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4099 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4100 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4101 nonstatic_oop_map_count += 1;
4102 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4103 first_nonstatic_oop_offset = real_offset;
4104 }
4105 }
4106 break;
4107 case NONSTATIC_BYTE:
4108 if( nonstatic_byte_space_count > 0 ) {
4109 real_offset = nonstatic_byte_space_offset;
4110 nonstatic_byte_space_offset += 1;
4111 nonstatic_byte_space_count -= 1;
4112 } else {
4113 real_offset = next_nonstatic_byte_offset;
4114 next_nonstatic_byte_offset += 1;
4115 }
4116 break;
4117 case NONSTATIC_SHORT:
4118 if( nonstatic_short_space_count > 0 ) {
4119 real_offset = nonstatic_short_space_offset;
4120 nonstatic_short_space_offset += BytesPerShort;
4121 nonstatic_short_space_count -= 1;
4122 } else {
4123 real_offset = next_nonstatic_short_offset;
4124 next_nonstatic_short_offset += BytesPerShort;
4125 }
4126 break;
4127 case NONSTATIC_WORD:
4128 if( nonstatic_word_space_count > 0 ) {
4129 real_offset = nonstatic_word_space_offset;
4130 nonstatic_word_space_offset += BytesPerInt;
4131 nonstatic_word_space_count -= 1;
4132 } else {
4133 real_offset = next_nonstatic_word_offset;
4134 next_nonstatic_word_offset += BytesPerInt;
4135 }
4136 break;
4137 case NONSTATIC_DOUBLE:
4138 real_offset = next_nonstatic_double_offset;
4139 next_nonstatic_double_offset += BytesPerLong;
4140 break;
4141 default:
4142 ShouldNotReachHere();
4143 }
4144 fs.set_offset(real_offset);
4145 }
4146
4147
4148 // Handle the contended cases.
4149 //
4150 // Each contended field should not intersect the cache line with another contended field.
4151 // In the absence of alignment information, we end up with pessimistically separating
4152 // the fields with full-width padding.
4153 //
4154 // Additionally, this should not break alignment for the fields, so we round the alignment up
4155 // for each field.
4156 if (nonstatic_contended_count > 0) {
4157
4158 // if there is at least one contended field, we need to have pre-padding for them
4159 next_nonstatic_padded_offset += ContendedPaddingWidth;
4160
4161 // collect all contended groups
4162 ResourceBitMap bm(cp->size());
4163 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4164 // skip already laid out fields
4165 if (fs.is_offset_set()) continue;
4166
4167 if (fs.is_contended()) {
4168 bm.set_bit(fs.contended_group());
4169 }
4170 }
4171
4172 int current_group = -1;
4173 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4174
4175 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4176
4177 // skip already laid out fields
4178 if (fs.is_offset_set()) continue;
4179
4180 // skip non-contended fields and fields from different group
4181 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4182
4183 // handle statics below
4184 if (fs.access_flags().is_static()) continue;
4185
4186 int real_offset = 0;
4187 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4188
4189 switch (atype) {
4190 case NONSTATIC_BYTE:
4191 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4192 real_offset = next_nonstatic_padded_offset;
4193 next_nonstatic_padded_offset += 1;
4194 break;
4195
4196 case NONSTATIC_SHORT:
4197 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4198 real_offset = next_nonstatic_padded_offset;
4199 next_nonstatic_padded_offset += BytesPerShort;
4200 break;
4201
4202 case NONSTATIC_WORD:
4203 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4204 real_offset = next_nonstatic_padded_offset;
4205 next_nonstatic_padded_offset += BytesPerInt;
4206 break;
4207
4208 case NONSTATIC_DOUBLE:
4209 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4210 real_offset = next_nonstatic_padded_offset;
4211 next_nonstatic_padded_offset += BytesPerLong;
4212 break;
4213
4214 case NONSTATIC_OOP:
4215 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4216 real_offset = next_nonstatic_padded_offset;
4217 next_nonstatic_padded_offset += heapOopSize;
4218
4219 // Record this oop in the oop maps
4220 if( nonstatic_oop_map_count > 0 &&
4221 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4222 real_offset -
4223 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4224 heapOopSize ) {
4225 // This oop is adjacent to the previous one, add to current oop map
4226 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4227 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4228 } else {
4229 // This oop is not adjacent to the previous one, create new oop map
4230 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4231 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4232 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4233 nonstatic_oop_map_count += 1;
4234 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4235 first_nonstatic_oop_offset = real_offset;
4236 }
4237 }
4238 break;
4239
4240 default:
4241 ShouldNotReachHere();
4242 }
4243
4244 if (fs.contended_group() == 0) {
4245 // Contended group defines the equivalence class over the fields:
4246 // the fields within the same contended group are not inter-padded.
4247 // The only exception is default group, which does not incur the
4248 // equivalence, and so requires intra-padding.
4249 next_nonstatic_padded_offset += ContendedPaddingWidth;
4250 }
4251
4252 fs.set_offset(real_offset);
4253 } // for
4254
4255 // Start laying out the next group.
4256 // Note that this will effectively pad the last group in the back;
4257 // this is expected to alleviate memory contention effects for
4258 // subclass fields and/or adjacent object.
4259 // If this was the default group, the padding is already in place.
4260 if (current_group != 0) {
4261 next_nonstatic_padded_offset += ContendedPaddingWidth;
4262 }
4263 }
4264
4265 // handle static fields
4266 }
4267
4268 // Entire class is contended, pad in the back.
4269 // This helps to alleviate memory contention effects for subclass fields
4270 // and/or adjacent object.
4271 if (is_contended_class) {
4272 next_nonstatic_padded_offset += ContendedPaddingWidth;
4273 }
4274
4275 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4276
4277 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, heapOopSize);
4278 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4279 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4280
4281 int static_field_size = (static_fields_end -
4282 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4283 nonstatic_field_size = nonstatic_field_size +
4284 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4285
4286 int instance_size = align_object_size(instance_end / wordSize);
4287
4288 assert(instance_size == align_object_size(align_up(
4289 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4290 wordSize) / wordSize), "consistent layout helper value");
4291
4292 // Invariant: nonstatic_field end/start should only change if there are
4293 // nonstatic fields in the class, or if the class is contended. We compare
4294 // against the non-aligned value, so that end alignment will not fail the
4295 // assert without actually having the fields.
4296 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4297 is_contended_class ||
4298 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4299
4300 // Number of non-static oop map blocks allocated at end of klass.
4301 const unsigned int total_oop_map_count =
4302 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4303 first_nonstatic_oop_offset);
4304
4305 #ifndef PRODUCT
4306 if (PrintFieldLayout) {
4307 print_field_layout(_class_name,
4308 _fields,
4309 cp,
4310 instance_size,
4311 nonstatic_fields_start,
4312 nonstatic_fields_end,
4313 static_fields_end);
4314 }
4315
4316 #endif
4317 // Pass back information needed for InstanceKlass creation
4318 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4319 info->nonstatic_oop_counts = nonstatic_oop_counts;
4320 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4321 info->total_oop_map_count = total_oop_map_count;
4322 info->instance_size = instance_size;
4323 info->static_field_size = static_field_size;
4324 info->nonstatic_field_size = nonstatic_field_size;
4325 info->has_nonstatic_fields = has_nonstatic_fields;
4326 }
4327
4328 static void fill_oop_maps(const InstanceKlass* k,
4329 unsigned int nonstatic_oop_map_count,
4330 const int* nonstatic_oop_offsets,
4331 const unsigned int* nonstatic_oop_counts) {
4332
4333 assert(k != NULL, "invariant");
4334
4335 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4336 const InstanceKlass* const super = k->superklass();
4337 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4338 if (super_count > 0) {
4339 // Copy maps from superklass
4340 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4341 for (unsigned int i = 0; i < super_count; ++i) {
4342 *this_oop_map++ = *super_oop_map++;
4343 }
4344 }
4345
4346 if (nonstatic_oop_map_count > 0) {
4347 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4348 // The counts differ because there is no gap between superklass's last oop
4349 // field and the first local oop field. Extend the last oop map copied
4350 // from the superklass instead of creating new one.
4351 nonstatic_oop_map_count--;
4352 nonstatic_oop_offsets++;
4353 this_oop_map--;
4354 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4355 this_oop_map++;
4356 }
4357
4358 // Add new map blocks, fill them
4359 while (nonstatic_oop_map_count-- > 0) {
4360 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4361 this_oop_map->set_count(*nonstatic_oop_counts++);
4362 this_oop_map++;
4363 }
4364 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4365 this_oop_map, "sanity");
4366 }
4367 }
4368
4369
4370 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4371 assert(ik != NULL, "invariant");
4372
4373 const Klass* const super = ik->super();
4374
4375 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4376 // in which case we don't have to register objects as finalizable
4377 if (!_has_empty_finalizer) {
4378 if (_has_finalizer ||
4379 (super != NULL && super->has_finalizer())) {
4380 ik->set_has_finalizer();
4381 }
4382 }
4383
4384 #ifdef ASSERT
4385 bool f = false;
4386 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4387 vmSymbols::void_method_signature());
4388 if (m != NULL && !m->is_empty_method()) {
4389 f = true;
4390 }
4391
4392 // Spec doesn't prevent agent from redefinition of empty finalizer.
4393 // Despite the fact that it's generally bad idea and redefined finalizer
4394 // will not work as expected we shouldn't abort vm in this case
4395 if (!ik->has_redefined_this_or_super()) {
4396 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4397 }
4398 #endif
4399
4400 // Check if this klass supports the java.lang.Cloneable interface
4401 if (SystemDictionary::Cloneable_klass_loaded()) {
4402 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4403 ik->set_is_cloneable();
4404 }
4405 }
4406
4407 // Check if this klass has a vanilla default constructor
4408 if (super == NULL) {
4409 // java.lang.Object has empty default constructor
4410 ik->set_has_vanilla_constructor();
4411 } else {
4412 if (super->has_vanilla_constructor() &&
4413 _has_vanilla_constructor) {
4414 ik->set_has_vanilla_constructor();
4415 }
4416 #ifdef ASSERT
4417 bool v = false;
4418 if (super->has_vanilla_constructor()) {
4419 const Method* const constructor =
4420 ik->find_method(vmSymbols::object_initializer_name(),
4421 vmSymbols::void_method_signature());
4422 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4423 v = true;
4424 }
4425 }
4426 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4427 #endif
4428 }
4429
4430 // If it cannot be fast-path allocated, set a bit in the layout helper.
4431 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4432 assert(ik->size_helper() > 0, "layout_helper is initialized");
4433 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4434 || ik->is_abstract() || ik->is_interface()
4435 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4436 || ik->size_helper() >= FastAllocateSizeLimit) {
4437 // Forbid fast-path allocation.
4438 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4439 ik->set_layout_helper(lh);
4440 }
4441 }
4442
4443 // utility methods for appending an array with check for duplicates
4444
4445 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4446 const Array<InstanceKlass*>* const ifs) {
4447 // iterate over new interfaces
4448 for (int i = 0; i < ifs->length(); i++) {
4449 InstanceKlass* const e = ifs->at(i);
4450 assert(e->is_klass() && e->is_interface(), "just checking");
4451 // add new interface
4452 result->append_if_missing(e);
4453 }
4454 }
4455
4456 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4457 Array<InstanceKlass*>* local_ifs,
4458 ClassLoaderData* loader_data,
4459 TRAPS) {
4460 assert(local_ifs != NULL, "invariant");
4461 assert(loader_data != NULL, "invariant");
4462
4463 // Compute maximum size for transitive interfaces
4464 int max_transitive_size = 0;
4465 int super_size = 0;
4466 // Add superclass transitive interfaces size
4467 if (super != NULL) {
4468 super_size = super->transitive_interfaces()->length();
4469 max_transitive_size += super_size;
4470 }
4471 // Add local interfaces' super interfaces
4472 const int local_size = local_ifs->length();
4473 for (int i = 0; i < local_size; i++) {
4474 InstanceKlass* const l = local_ifs->at(i);
4475 max_transitive_size += l->transitive_interfaces()->length();
4476 }
4477 // Finally add local interfaces
4478 max_transitive_size += local_size;
4479 // Construct array
4480 if (max_transitive_size == 0) {
4481 // no interfaces, use canonicalized array
4482 return Universe::the_empty_instance_klass_array();
4483 } else if (max_transitive_size == super_size) {
4484 // no new local interfaces added, share superklass' transitive interface array
4485 return super->transitive_interfaces();
4486 } else if (max_transitive_size == local_size) {
4487 // only local interfaces added, share local interface array
4488 return local_ifs;
4489 } else {
4490 ResourceMark rm;
4491 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4492
4493 // Copy down from superclass
4494 if (super != NULL) {
4495 append_interfaces(result, super->transitive_interfaces());
4496 }
4497
4498 // Copy down from local interfaces' superinterfaces
4499 for (int i = 0; i < local_size; i++) {
4500 InstanceKlass* const l = local_ifs->at(i);
4501 append_interfaces(result, l->transitive_interfaces());
4502 }
4503 // Finally add local interfaces
4504 append_interfaces(result, local_ifs);
4505
4506 // length will be less than the max_transitive_size if duplicates were removed
4507 const int length = result->length();
4508 assert(length <= max_transitive_size, "just checking");
4509 Array<InstanceKlass*>* const new_result =
4510 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4511 for (int i = 0; i < length; i++) {
4512 InstanceKlass* const e = result->at(i);
4513 assert(e != NULL, "just checking");
4514 new_result->at_put(i, e);
4515 }
4516 return new_result;
4517 }
4518 }
4519
4520 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4521 assert(this_klass != NULL, "invariant");
4522 const Klass* const super = this_klass->super();
4523 if (super != NULL) {
4524
4525 // If the loader is not the boot loader then throw an exception if its
4526 // superclass is in package jdk.internal.reflect and its loader is not a
4527 // special reflection class loader
4528 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4529 assert(super->is_instance_klass(), "super is not instance klass");
4530 PackageEntry* super_package = super->package();
4531 if (super_package != NULL &&
4532 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4533 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4534 ResourceMark rm(THREAD);
4535 Exceptions::fthrow(
4536 THREAD_AND_LOCATION,
4537 vmSymbols::java_lang_IllegalAccessError(),
4538 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4539 this_klass->external_name(),
4540 this_klass->class_loader_data()->loader_name_and_id(),
4541 super->external_name());
4542 return;
4543 }
4544 }
4545
4546 Reflection::VerifyClassAccessResults vca_result =
4547 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4548 if (vca_result != Reflection::ACCESS_OK) {
4549 ResourceMark rm(THREAD);
4550 char* msg = Reflection::verify_class_access_msg(this_klass,
4551 InstanceKlass::cast(super),
4552 vca_result);
4553 if (msg == NULL) {
4554 bool same_module = (this_klass->module() == super->module());
4555 Exceptions::fthrow(
4556 THREAD_AND_LOCATION,
4557 vmSymbols::java_lang_IllegalAccessError(),
4558 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4559 this_klass->external_name(),
4560 super->is_abstract() ? "abstract " : "",
4561 super->external_name(),
4562 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4563 (same_module) ? "" : "; ",
4564 (same_module) ? "" : super->class_in_module_of_loader());
4565 } else {
4566 // Add additional message content.
4567 Exceptions::fthrow(
4568 THREAD_AND_LOCATION,
4569 vmSymbols::java_lang_IllegalAccessError(),
4570 "superclass access check failed: %s",
4571 msg);
4572 }
4573 }
4574 }
4575 }
4576
4577
4578 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4579 assert(this_klass != NULL, "invariant");
4580 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4581 const int lng = local_interfaces->length();
4582 for (int i = lng - 1; i >= 0; i--) {
4583 InstanceKlass* const k = local_interfaces->at(i);
4584 assert (k != NULL && k->is_interface(), "invalid interface");
4585 Reflection::VerifyClassAccessResults vca_result =
4586 Reflection::verify_class_access(this_klass, k, false);
4587 if (vca_result != Reflection::ACCESS_OK) {
4588 ResourceMark rm(THREAD);
4589 char* msg = Reflection::verify_class_access_msg(this_klass,
4590 k,
4591 vca_result);
4592 if (msg == NULL) {
4593 bool same_module = (this_klass->module() == k->module());
4594 Exceptions::fthrow(
4595 THREAD_AND_LOCATION,
4596 vmSymbols::java_lang_IllegalAccessError(),
4597 "class %s cannot access its superinterface %s (%s%s%s)",
4598 this_klass->external_name(),
4599 k->external_name(),
4600 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4601 (same_module) ? "" : "; ",
4602 (same_module) ? "" : k->class_in_module_of_loader());
4603 } else {
4604 // Add additional message content.
4605 Exceptions::fthrow(
4606 THREAD_AND_LOCATION,
4607 vmSymbols::java_lang_IllegalAccessError(),
4608 "superinterface check failed: %s",
4609 msg);
4610 }
4611 }
4612 }
4613 }
4614
4615
4616 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4617 assert(this_klass != NULL, "invariant");
4618 const Array<Method*>* const methods = this_klass->methods();
4619 const int num_methods = methods->length();
4620
4621 // go thru each method and check if it overrides a final method
4622 for (int index = 0; index < num_methods; index++) {
4623 const Method* const m = methods->at(index);
4624
4625 // skip private, static, and <init> methods
4626 if ((!m->is_private() && !m->is_static()) &&
4627 (m->name() != vmSymbols::object_initializer_name())) {
4628
4629 const Symbol* const name = m->name();
4630 const Symbol* const signature = m->signature();
4631 const Klass* k = this_klass->super();
4632 const Method* super_m = NULL;
4633 while (k != NULL) {
4634 // skip supers that don't have final methods.
4635 if (k->has_final_method()) {
4636 // lookup a matching method in the super class hierarchy
4637 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4638 if (super_m == NULL) {
4639 break; // didn't find any match; get out
4640 }
4641
4642 if (super_m->is_final() && !super_m->is_static() &&
4643 !super_m->access_flags().is_private()) {
4644 // matching method in super is final, and not static or private
4645 bool can_access = Reflection::verify_member_access(this_klass,
4646 super_m->method_holder(),
4647 super_m->method_holder(),
4648 super_m->access_flags(),
4649 false, false, CHECK);
4650 if (can_access) {
4651 // this class can access super final method and therefore override
4652 ResourceMark rm(THREAD);
4653 Exceptions::fthrow(THREAD_AND_LOCATION,
4654 vmSymbols::java_lang_VerifyError(),
4655 "class %s overrides final method %s.%s%s",
4656 this_klass->external_name(),
4657 super_m->method_holder()->external_name(),
4658 name->as_C_string(),
4659 signature->as_C_string()
4660 );
4661 return;
4662 }
4663 }
4664
4665 // continue to look from super_m's holder's super.
4666 k = super_m->method_holder()->super();
4667 continue;
4668 }
4669
4670 k = k->super();
4671 }
4672 }
4673 }
4674 }
4675
4676
4677 // assumes that this_klass is an interface
4678 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4679 assert(this_klass != NULL, "invariant");
4680 assert(this_klass->is_interface(), "not an interface");
4681 const Array<Method*>* methods = this_klass->methods();
4682 const int num_methods = methods->length();
4683
4684 for (int index = 0; index < num_methods; index++) {
4685 const Method* const m = methods->at(index);
4686 // if m is static and not the init method, throw a verify error
4687 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4688 ResourceMark rm(THREAD);
4689 Exceptions::fthrow(
4690 THREAD_AND_LOCATION,
4691 vmSymbols::java_lang_VerifyError(),
4692 "Illegal static method %s in interface %s",
4693 m->name()->as_C_string(),
4694 this_klass->external_name()
4695 );
4696 return;
4697 }
4698 }
4699 }
4700
4701 // utility methods for format checking
4702
4703 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4704 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4705 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4706 if (is_module) {
4707 ResourceMark rm(THREAD);
4708 Exceptions::fthrow(
4709 THREAD_AND_LOCATION,
4710 vmSymbols::java_lang_NoClassDefFoundError(),
4711 "%s is not a class because access_flag ACC_MODULE is set",
4712 _class_name->as_C_string());
4713 return;
4714 }
4715
4716 if (!_need_verify) { return; }
4717
4718 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4719 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4720 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4721 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4722 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4723 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4724 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4725
4726 if ((is_abstract && is_final) ||
4727 (is_interface && !is_abstract) ||
4728 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4729 (!is_interface && major_gte_15 && is_annotation)) {
4730 ResourceMark rm(THREAD);
4731 Exceptions::fthrow(
4732 THREAD_AND_LOCATION,
4733 vmSymbols::java_lang_ClassFormatError(),
4734 "Illegal class modifiers in class %s: 0x%X",
4735 _class_name->as_C_string(), flags
4736 );
4737 return;
4738 }
4739 }
4740
4741 static bool has_illegal_visibility(jint flags) {
4742 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4743 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4744 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4745
4746 return ((is_public && is_protected) ||
4747 (is_public && is_private) ||
4748 (is_protected && is_private));
4749 }
4750
4751 // A legal major_version.minor_version must be one of the following:
4752 //
4753 // Major_version >= 45 and major_version < 56, any minor_version.
4754 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4755 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4756 //
4757 static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4758 ResourceMark rm(THREAD);
4759 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4760 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4761 Exceptions::fthrow(
4762 THREAD_AND_LOCATION,
4763 vmSymbols::java_lang_UnsupportedClassVersionError(),
4764 "%s (class file version %u.%u) was compiled with an invalid major version",
4765 class_name->as_C_string(), major, minor);
4766 return;
4767 }
4768
4769 if (major > max_version) {
4770 Exceptions::fthrow(
4771 THREAD_AND_LOCATION,
4772 vmSymbols::java_lang_UnsupportedClassVersionError(),
4773 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4774 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4775 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4776 return;
4777 }
4778
4779 if (major < JAVA_12_VERSION || minor == 0) {
4780 return;
4781 }
4782
4783 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4784 if (major != max_version) {
4785 Exceptions::fthrow(
4786 THREAD_AND_LOCATION,
4787 vmSymbols::java_lang_UnsupportedClassVersionError(),
4788 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4789 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4790 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4791 return;
4792 }
4793
4794 if (!Arguments::enable_preview()) {
4795 Exceptions::fthrow(
4796 THREAD_AND_LOCATION,
4797 vmSymbols::java_lang_UnsupportedClassVersionError(),
4798 "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4799 class_name->as_C_string(), major, minor);
4800 return;
4801 }
4802
4803 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4804 Exceptions::fthrow(
4805 THREAD_AND_LOCATION,
4806 vmSymbols::java_lang_UnsupportedClassVersionError(),
4807 "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4808 class_name->as_C_string(), major, minor);
4809 }
4810 }
4811
4812 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4813 bool is_interface,
4814 TRAPS) const {
4815 if (!_need_verify) { return; }
4816
4817 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4818 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4819 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4820 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4821 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4822 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4823 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4824 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4825 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4826
4827 bool is_illegal = false;
4828
4829 if (is_interface) {
4830 if (!is_public || !is_static || !is_final || is_private ||
4831 is_protected || is_volatile || is_transient ||
4832 (major_gte_15 && is_enum)) {
4833 is_illegal = true;
4834 }
4835 } else { // not interface
4836 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4837 is_illegal = true;
4838 }
4839 }
4840
4841 if (is_illegal) {
4842 ResourceMark rm(THREAD);
4843 Exceptions::fthrow(
4844 THREAD_AND_LOCATION,
4845 vmSymbols::java_lang_ClassFormatError(),
4846 "Illegal field modifiers in class %s: 0x%X",
4847 _class_name->as_C_string(), flags);
4848 return;
4849 }
4850 }
4851
4852 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4853 bool is_interface,
4854 const Symbol* name,
4855 TRAPS) const {
4856 if (!_need_verify) { return; }
4857
4858 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4859 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4860 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4861 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4862 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4863 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4864 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4865 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4866 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4867 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4868 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4869 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4870 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4871
4872 bool is_illegal = false;
4873
4874 if (is_interface) {
4875 if (major_gte_8) {
4876 // Class file version is JAVA_8_VERSION or later Methods of
4877 // interfaces may set any of the flags except ACC_PROTECTED,
4878 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4879 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4880 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4881 (is_native || is_protected || is_final || is_synchronized) ||
4882 // If a specific method of a class or interface has its
4883 // ACC_ABSTRACT flag set, it must not have any of its
4884 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4885 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4886 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4887 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4888 (is_abstract && (is_private || is_static || is_strict))) {
4889 is_illegal = true;
4890 }
4891 } else if (major_gte_15) {
4892 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4893 if (!is_public || is_private || is_protected || is_static || is_final ||
4894 is_synchronized || is_native || !is_abstract || is_strict) {
4895 is_illegal = true;
4896 }
4897 } else {
4898 // Class file version is pre-JAVA_1_5_VERSION
4899 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4900 is_illegal = true;
4901 }
4902 }
4903 } else { // not interface
4904 if (has_illegal_visibility(flags)) {
4905 is_illegal = true;
4906 } else {
4907 if (is_initializer) {
4908 if (is_static || is_final || is_synchronized || is_native ||
4909 is_abstract || (major_gte_15 && is_bridge)) {
4910 is_illegal = true;
4911 }
4912 } else { // not initializer
4913 if (is_abstract) {
4914 if ((is_final || is_native || is_private || is_static ||
4915 (major_gte_15 && (is_synchronized || is_strict)))) {
4916 is_illegal = true;
4917 }
4918 }
4919 }
4920 }
4921 }
4922
4923 if (is_illegal) {
4924 ResourceMark rm(THREAD);
4925 Exceptions::fthrow(
4926 THREAD_AND_LOCATION,
4927 vmSymbols::java_lang_ClassFormatError(),
4928 "Method %s in class %s has illegal modifiers: 0x%X",
4929 name->as_C_string(), _class_name->as_C_string(), flags);
4930 return;
4931 }
4932 }
4933
4934 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4935 int length,
4936 TRAPS) const {
4937 assert(_need_verify, "only called when _need_verify is true");
4938 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4939 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4940 }
4941 }
4942
4943 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4944 // In class names, '/' separates unqualified names. This is verified in this function also.
4945 // Method names also may not contain the characters '<' or '>', unless <init>
4946 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4947 // method. Because these names have been checked as special cases before
4948 // calling this method in verify_legal_method_name.
4949 //
4950 // This method is also called from the modular system APIs in modules.cpp
4951 // to verify the validity of module and package names.
4952 bool ClassFileParser::verify_unqualified_name(const char* name,
4953 unsigned int length,
4954 int type) {
4955 if (length == 0) return false; // Must have at least one char.
4956 for (const char* p = name; p != name + length; p++) {
4957 switch(*p) {
4958 case JVM_SIGNATURE_DOT:
4959 case JVM_SIGNATURE_ENDCLASS:
4960 case JVM_SIGNATURE_ARRAY:
4961 // do not permit '.', ';', or '['
4962 return false;
4963 case JVM_SIGNATURE_SLASH:
4964 // check for '//' or leading or trailing '/' which are not legal
4965 // unqualified name must not be empty
4966 if (type == ClassFileParser::LegalClass) {
4967 if (p == name || p+1 >= name+length ||
4968 *(p+1) == JVM_SIGNATURE_SLASH) {
4969 return false;
4970 }
4971 } else {
4972 return false; // do not permit '/' unless it's class name
4973 }
4974 break;
4975 case JVM_SIGNATURE_SPECIAL:
4976 case JVM_SIGNATURE_ENDSPECIAL:
4977 // do not permit '<' or '>' in method names
4978 if (type == ClassFileParser::LegalMethod) {
4979 return false;
4980 }
4981 }
4982 }
4983 return true;
4984 }
4985
4986 // Take pointer to a UTF8 byte string (not NUL-terminated).
4987 // Skip over the longest part of the string that could
4988 // be taken as a fieldname. Allow '/' if slash_ok is true.
4989 // Return a pointer to just past the fieldname.
4990 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4991 // being true, we saw consecutive slashes (meaning we were looking for a
4992 // qualified path but found something that was badly-formed).
4993 static const char* skip_over_field_name(const char* const name,
4994 bool slash_ok,
4995 unsigned int length) {
4996 const char* p;
4997 jboolean last_is_slash = false;
4998 jboolean not_first_ch = false;
4999
5000 for (p = name; p != name + length; not_first_ch = true) {
5001 const char* old_p = p;
5002 jchar ch = *p;
5003 if (ch < 128) {
5004 p++;
5005 // quick check for ascii
5006 if ((ch >= 'a' && ch <= 'z') ||
5007 (ch >= 'A' && ch <= 'Z') ||
5008 (ch == '_' || ch == '$') ||
5009 (not_first_ch && ch >= '0' && ch <= '9')) {
5010 last_is_slash = false;
5011 continue;
5012 }
5013 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
5014 if (last_is_slash) {
5015 return NULL; // Don't permit consecutive slashes
5016 }
5017 last_is_slash = true;
5018 continue;
5019 }
5020 }
5021 else {
5022 jint unicode_ch;
5023 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5024 p = tmp_p;
5025 last_is_slash = false;
5026 // Check if ch is Java identifier start or is Java identifier part
5027 // 4672820: call java.lang.Character methods directly without generating separate tables.
5028 EXCEPTION_MARK;
5029 // return value
5030 JavaValue result(T_BOOLEAN);
5031 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5032 JavaCallArguments args;
5033 args.push_int(unicode_ch);
5034
5035 if (not_first_ch) {
5036 // public static boolean isJavaIdentifierPart(char ch);
5037 JavaCalls::call_static(&result,
5038 SystemDictionary::Character_klass(),
5039 vmSymbols::isJavaIdentifierPart_name(),
5040 vmSymbols::int_bool_signature(),
5041 &args,
5042 THREAD);
5043 } else {
5044 // public static boolean isJavaIdentifierStart(char ch);
5045 JavaCalls::call_static(&result,
5046 SystemDictionary::Character_klass(),
5047 vmSymbols::isJavaIdentifierStart_name(),
5048 vmSymbols::int_bool_signature(),
5049 &args,
5050 THREAD);
5051 }
5052 if (HAS_PENDING_EXCEPTION) {
5053 CLEAR_PENDING_EXCEPTION;
5054 return NULL;
5055 }
5056 if(result.get_jboolean()) {
5057 continue;
5058 }
5059 }
5060 return (not_first_ch) ? old_p : NULL;
5061 }
5062 return (not_first_ch) ? p : NULL;
5063 }
5064
5065 // Take pointer to a UTF8 byte string (not NUL-terminated).
5066 // Skip over the longest part of the string that could
5067 // be taken as a field signature. Allow "void" if void_ok.
5068 // Return a pointer to just past the signature.
5069 // Return NULL if no legal signature is found.
5070 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5071 bool void_ok,
5072 unsigned int length,
5073 TRAPS) const {
5074 unsigned int array_dim = 0;
5075 while (length > 0) {
5076 switch (signature[0]) {
5077 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5078 case JVM_SIGNATURE_BOOLEAN:
5079 case JVM_SIGNATURE_BYTE:
5080 case JVM_SIGNATURE_CHAR:
5081 case JVM_SIGNATURE_SHORT:
5082 case JVM_SIGNATURE_INT:
5083 case JVM_SIGNATURE_FLOAT:
5084 case JVM_SIGNATURE_LONG:
5085 case JVM_SIGNATURE_DOUBLE:
5086 return signature + 1;
5087 case JVM_SIGNATURE_CLASS: {
5088 if (_major_version < JAVA_1_5_VERSION) {
5089 // Skip over the class name if one is there
5090 const char* const p = skip_over_field_name(signature + 1, true, --length);
5091
5092 // The next character better be a semicolon
5093 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
5094 return p + 1;
5095 }
5096 }
5097 else {
5098 // Skip leading 'L' and ignore first appearance of ';'
5099 signature++;
5100 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
5101 // Format check signature
5102 if (c != NULL) {
5103 int newlen = c - (char*) signature;
5104 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5105 if (!legal) {
5106 classfile_parse_error("Class name is empty or contains illegal character "
5107 "in descriptor in class file %s",
5108 CHECK_0);
5109 return NULL;
5110 }
5111 return signature + newlen + 1;
5112 }
5113 }
5114 return NULL;
5115 }
5116 case JVM_SIGNATURE_ARRAY:
5117 array_dim++;
5118 if (array_dim > 255) {
5119 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5120 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5121 }
5122 // The rest of what's there better be a legal signature
5123 signature++;
5124 length--;
5125 void_ok = false;
5126 break;
5127 default:
5128 return NULL;
5129 }
5130 }
5131 return NULL;
5132 }
5133
5134 // Checks if name is a legal class name.
5135 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5136 if (!_need_verify || _relax_verify) { return; }
5137
5138 assert(name->refcount() > 0, "symbol must be kept alive");
5139 char* bytes = (char*)name->bytes();
5140 unsigned int length = name->utf8_length();
5141 bool legal = false;
5142
5143 if (length > 0) {
5144 const char* p;
5145 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5146 p = skip_over_field_signature(bytes, false, length, CHECK);
5147 legal = (p != NULL) && ((p - bytes) == (int)length);
5148 } else if (_major_version < JAVA_1_5_VERSION) {
5149 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5150 p = skip_over_field_name(bytes, true, length);
5151 legal = (p != NULL) && ((p - bytes) == (int)length);
5152 }
5153 } else {
5154 // 4900761: relax the constraints based on JSR202 spec
5155 // Class names may be drawn from the entire Unicode character set.
5156 // Identifiers between '/' must be unqualified names.
5157 // The utf8 string has been verified when parsing cpool entries.
5158 legal = verify_unqualified_name(bytes, length, LegalClass);
5159 }
5160 }
5161 if (!legal) {
5162 ResourceMark rm(THREAD);
5163 assert(_class_name != NULL, "invariant");
5164 Exceptions::fthrow(
5165 THREAD_AND_LOCATION,
5166 vmSymbols::java_lang_ClassFormatError(),
5167 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5168 _class_name->as_C_string()
5169 );
5170 return;
5171 }
5172 }
5173
5174 // Checks if name is a legal field name.
5175 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5176 if (!_need_verify || _relax_verify) { return; }
5177
5178 char* bytes = (char*)name->bytes();
5179 unsigned int length = name->utf8_length();
5180 bool legal = false;
5181
5182 if (length > 0) {
5183 if (_major_version < JAVA_1_5_VERSION) {
5184 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5185 const char* p = skip_over_field_name(bytes, false, length);
5186 legal = (p != NULL) && ((p - bytes) == (int)length);
5187 }
5188 } else {
5189 // 4881221: relax the constraints based on JSR202 spec
5190 legal = verify_unqualified_name(bytes, length, LegalField);
5191 }
5192 }
5193
5194 if (!legal) {
5195 ResourceMark rm(THREAD);
5196 assert(_class_name != NULL, "invariant");
5197 Exceptions::fthrow(
5198 THREAD_AND_LOCATION,
5199 vmSymbols::java_lang_ClassFormatError(),
5200 "Illegal field name \"%.*s\" in class %s", length, bytes,
5201 _class_name->as_C_string()
5202 );
5203 return;
5204 }
5205 }
5206
5207 // Checks if name is a legal method name.
5208 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5209 if (!_need_verify || _relax_verify) { return; }
5210
5211 assert(name != NULL, "method name is null");
5212 char* bytes = (char*)name->bytes();
5213 unsigned int length = name->utf8_length();
5214 bool legal = false;
5215
5216 if (length > 0) {
5217 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
5218 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5219 legal = true;
5220 }
5221 } else if (_major_version < JAVA_1_5_VERSION) {
5222 const char* p;
5223 p = skip_over_field_name(bytes, false, length);
5224 legal = (p != NULL) && ((p - bytes) == (int)length);
5225 } else {
5226 // 4881221: relax the constraints based on JSR202 spec
5227 legal = verify_unqualified_name(bytes, length, LegalMethod);
5228 }
5229 }
5230
5231 if (!legal) {
5232 ResourceMark rm(THREAD);
5233 assert(_class_name != NULL, "invariant");
5234 Exceptions::fthrow(
5235 THREAD_AND_LOCATION,
5236 vmSymbols::java_lang_ClassFormatError(),
5237 "Illegal method name \"%.*s\" in class %s", length, bytes,
5238 _class_name->as_C_string()
5239 );
5240 return;
5241 }
5242 }
5243
5244
5245 // Checks if signature is a legal field signature.
5246 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5247 const Symbol* signature,
5248 TRAPS) const {
5249 if (!_need_verify) { return; }
5250
5251 const char* const bytes = (const char* const)signature->bytes();
5252 const unsigned int length = signature->utf8_length();
5253 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5254
5255 if (p == NULL || (p - bytes) != (int)length) {
5256 throwIllegalSignature("Field", name, signature, CHECK);
5257 }
5258 }
5259
5260 // Checks if signature is a legal method signature.
5261 // Returns number of parameters
5262 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5263 const Symbol* signature,
5264 TRAPS) const {
5265 if (!_need_verify) {
5266 // make sure caller's args_size will be less than 0 even for non-static
5267 // method so it will be recomputed in compute_size_of_parameters().
5268 return -2;
5269 }
5270
5271 // Class initializers cannot have args for class format version >= 51.
5272 if (name == vmSymbols::class_initializer_name() &&
5273 signature != vmSymbols::void_method_signature() &&
5274 _major_version >= JAVA_7_VERSION) {
5275 throwIllegalSignature("Method", name, signature, CHECK_0);
5276 return 0;
5277 }
5278
5279 unsigned int args_size = 0;
5280 const char* p = (const char*)signature->bytes();
5281 unsigned int length = signature->utf8_length();
5282 const char* nextp;
5283
5284 // The first character must be a '('
5285 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5286 length--;
5287 // Skip over legal field signatures
5288 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5289 while ((length > 0) && (nextp != NULL)) {
5290 args_size++;
5291 if (p[0] == 'J' || p[0] == 'D') {
5292 args_size++;
5293 }
5294 length -= nextp - p;
5295 p = nextp;
5296 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5297 }
5298 // The first non-signature thing better be a ')'
5299 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5300 length--;
5301 if (name->utf8_length() > 0 && name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
5302 // All internal methods must return void
5303 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5304 return args_size;
5305 }
5306 } else {
5307 // Now we better just have a return value
5308 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5309 if (nextp && ((int)length == (nextp - p))) {
5310 return args_size;
5311 }
5312 }
5313 }
5314 }
5315 // Report error
5316 throwIllegalSignature("Method", name, signature, CHECK_0);
5317 return 0;
5318 }
5319
5320 int ClassFileParser::static_field_size() const {
5321 assert(_field_info != NULL, "invariant");
5322 return _field_info->static_field_size;
5323 }
5324
5325 int ClassFileParser::total_oop_map_count() const {
5326 assert(_field_info != NULL, "invariant");
5327 return _field_info->total_oop_map_count;
5328 }
5329
5330 jint ClassFileParser::layout_size() const {
5331 assert(_field_info != NULL, "invariant");
5332 return _field_info->instance_size;
5333 }
5334
5335 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5336 const Array<Method*>* methods) {
5337 assert(ik != NULL, "invariant");
5338 assert(methods != NULL, "invariant");
5339
5340 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5341 // (We used to do this lazily, but now we query it in Rewriter,
5342 // which is eagerly done for every method, so we might as well do it now,
5343 // when everything is fresh in memory.)
5344 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5345
5346 if (klass_id != vmSymbols::NO_SID) {
5347 for (int j = 0; j < methods->length(); ++j) {
5348 Method* method = methods->at(j);
5349 method->init_intrinsic_id();
5350
5351 if (CheckIntrinsics) {
5352 // Check if an intrinsic is defined for method 'method',
5353 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5354 if (method->intrinsic_id() != vmIntrinsics::_none &&
5355 !method->intrinsic_candidate()) {
5356 tty->print("Compiler intrinsic is defined for method [%s], "
5357 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5358 method->name_and_sig_as_C_string(),
5359 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5360 );
5361 tty->cr();
5362 DEBUG_ONLY(vm_exit(1));
5363 }
5364 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5365 // but there is no intrinsic available for it.
5366 if (method->intrinsic_candidate() &&
5367 method->intrinsic_id() == vmIntrinsics::_none) {
5368 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5369 "but no compiler intrinsic is defined for the method.%s",
5370 method->name_and_sig_as_C_string(),
5371 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5372 );
5373 tty->cr();
5374 DEBUG_ONLY(vm_exit(1));
5375 }
5376 }
5377 } // end for
5378
5379 #ifdef ASSERT
5380 if (CheckIntrinsics) {
5381 // Check for orphan methods in the current class. A method m
5382 // of a class C is orphan if an intrinsic is defined for method m,
5383 // but class C does not declare m.
5384 // The check is potentially expensive, therefore it is available
5385 // only in debug builds.
5386
5387 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5388 if (vmIntrinsics::_compiledLambdaForm == id) {
5389 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5390 // generated for the JVM from a LambdaForm and therefore no method
5391 // is defined for it.
5392 continue;
5393 }
5394
5395 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5396 // Check if the current class contains a method with the same
5397 // name, flags, signature.
5398 bool match = false;
5399 for (int j = 0; j < methods->length(); ++j) {
5400 const Method* method = methods->at(j);
5401 if (method->intrinsic_id() == id) {
5402 match = true;
5403 break;
5404 }
5405 }
5406
5407 if (!match) {
5408 char buf[1000];
5409 tty->print("Compiler intrinsic is defined for method [%s], "
5410 "but the method is not available in class [%s].%s",
5411 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5412 buf, sizeof(buf)),
5413 ik->name()->as_C_string(),
5414 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5415 );
5416 tty->cr();
5417 DEBUG_ONLY(vm_exit(1));
5418 }
5419 }
5420 } // end for
5421 } // CheckIntrinsics
5422 #endif // ASSERT
5423 }
5424 }
5425
5426 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
5427 const ClassInstanceInfo& cl_inst_info,
5428 TRAPS) {
5429 if (_klass != NULL) {
5430 return _klass;
5431 }
5432
5433 InstanceKlass* const ik =
5434 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5435
5436 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5437
5438 assert(_klass == ik, "invariant");
5439
5440
5441 if (ik->should_store_fingerprint()) {
5442 ik->store_fingerprint(_stream->compute_fingerprint());
5443 }
5444
5445 ik->set_has_passed_fingerprint_check(false);
5446 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5447 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5448 uint64_t fp = ik->has_stored_fingerprint() ? ik->get_stored_fingerprint() : _stream->compute_fingerprint();
5449 if (aot_fp != 0 && aot_fp == fp) {
5450 // This class matches with a class saved in an AOT library
5451 ik->set_has_passed_fingerprint_check(true);
5452 } else {
5453 ResourceMark rm;
5454 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5455 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5456 }
5457 }
5458
5459 return ik;
5460 }
5461
5462 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5463 bool changed_by_loadhook,
5464 const ClassInstanceInfo& cl_inst_info,
5465 TRAPS) {
5466 assert(ik != NULL, "invariant");
5467
5468 // Set name and CLD before adding to CLD
5469 ik->set_class_loader_data(_loader_data);
5470 ik->set_name(_class_name);
5471
5472 // Add all classes to our internal class loader list here,
5473 // including classes in the bootstrap (NULL) class loader.
5474 const bool publicize = !is_internal();
5475
5476 _loader_data->add_class(ik, publicize);
5477
5478 set_klass_to_deallocate(ik);
5479
5480 assert(_field_info != NULL, "invariant");
5481 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5482 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5483 "sanity");
5484
5485 assert(ik->is_instance_klass(), "sanity");
5486 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5487
5488 // Fill in information already parsed
5489 ik->set_should_verify_class(_need_verify);
5490
5491 // Not yet: supers are done below to support the new subtype-checking fields
5492 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5493 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5494 assert(_fac != NULL, "invariant");
5495 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5496
5497 // this transfers ownership of a lot of arrays from
5498 // the parser onto the InstanceKlass*
5499 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5500
5501 // can only set dynamic nest-host after static nest information is set
5502 if (cl_inst_info.dynamic_nest_host() != NULL) {
5503 ik->set_nest_host(cl_inst_info.dynamic_nest_host(), CHECK);
5504 }
5505
5506 // note that is not safe to use the fields in the parser from this point on
5507 assert(NULL == _cp, "invariant");
5508 assert(NULL == _fields, "invariant");
5509 assert(NULL == _methods, "invariant");
5510 assert(NULL == _inner_classes, "invariant");
5511 assert(NULL == _nest_members, "invariant");
5512 assert(NULL == _local_interfaces, "invariant");
5513 assert(NULL == _combined_annotations, "invariant");
5514
5515 if (_has_final_method) {
5516 ik->set_has_final_method();
5517 }
5518
5519 ik->copy_method_ordering(_method_ordering, CHECK);
5520 // The InstanceKlass::_methods_jmethod_ids cache
5521 // is managed on the assumption that the initial cache
5522 // size is equal to the number of methods in the class. If
5523 // that changes, then InstanceKlass::idnum_can_increment()
5524 // has to be changed accordingly.
5525 ik->set_initial_method_idnum(ik->methods()->length());
5526
5527 ik->set_this_class_index(_this_class_index);
5528
5529 if (_is_hidden || is_unsafe_anonymous()) {
5530 // _this_class_index is a CONSTANT_Class entry that refers to this
5531 // hidden or anonymous class itself. If this class needs to refer to its own
5532 // methods or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5533 // _this_class_index. However, because this class is hidden or anonymous (it's
5534 // not stored in SystemDictionary), _this_class_index cannot be resolved
5535 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5536 // Therefore, we must eagerly resolve _this_class_index now.
5537 ik->constants()->klass_at_put(_this_class_index, ik);
5538 }
5539
5540 ik->set_minor_version(_minor_version);
5541 ik->set_major_version(_major_version);
5542 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5543 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5544
5545 if (_unsafe_anonymous_host != NULL) {
5546 assert (ik->is_unsafe_anonymous(), "should be the same");
5547 ik->set_unsafe_anonymous_host(_unsafe_anonymous_host);
5548 }
5549 if (_is_hidden) {
5550 ik->set_is_hidden();
5551 }
5552
5553 // Set PackageEntry for this_klass
5554 oop cl = ik->class_loader();
5555 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5556 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5557 ik->set_package(cld, CHECK);
5558 // Obtain this_klass' module entry
5559 ModuleEntry* module_entry = ik->module();
5560 assert(module_entry != NULL, "module_entry should always be set");
5561
5562
5563 const Array<Method*>* const methods = ik->methods();
5564 assert(methods != NULL, "invariant");
5565 const int methods_len = methods->length();
5566
5567 check_methods_for_intrinsics(ik, methods);
5568
5569 // Fill in field values obtained by parse_classfile_attributes
5570 if (_parsed_annotations->has_any_annotations()) {
5571 _parsed_annotations->apply_to(ik);
5572 }
5573
5574 apply_parsed_class_attributes(ik);
5575
5576 // Miranda methods
5577 if ((_num_miranda_methods > 0) ||
5578 // if this class introduced new miranda methods or
5579 (_super_klass != NULL && _super_klass->has_miranda_methods())
5580 // super class exists and this class inherited miranda methods
5581 ) {
5582 ik->set_has_miranda_methods(); // then set a flag
5583 }
5584
5585 // Fill in information needed to compute superclasses.
5586 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5587 ik->set_transitive_interfaces(_transitive_interfaces);
5588 _transitive_interfaces = NULL;
5589
5590 // Initialize itable offset tables
5591 klassItable::setup_itable_offset_table(ik);
5592
5593 // Compute transitive closure of interfaces this class implements
5594 // Do final class setup
5595 fill_oop_maps(ik,
5596 _field_info->nonstatic_oop_map_count,
5597 _field_info->nonstatic_oop_offsets,
5598 _field_info->nonstatic_oop_counts);
5599
5600 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5601 set_precomputed_flags(ik);
5602
5603 // check if this class can access its super class
5604 check_super_class_access(ik, CHECK);
5605
5606 // check if this class can access its superinterfaces
5607 check_super_interface_access(ik, CHECK);
5608
5609 // check if this class overrides any final method
5610 check_final_method_override(ik, CHECK);
5611
5612 // reject static interface methods prior to Java 8
5613 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5614 check_illegal_static_method(ik, CHECK);
5615 }
5616
5617 // Obtain java.lang.Module
5618 Handle module_handle(THREAD, module_entry->module());
5619
5620 // Allocate mirror and initialize static fields
5621 // The create_mirror() call will also call compute_modifiers()
5622 java_lang_Class::create_mirror(ik,
5623 Handle(THREAD, _loader_data->class_loader()),
5624 module_handle,
5625 _protection_domain,
5626 cl_inst_info.class_data(),
5627 CHECK);
5628
5629 assert(_all_mirandas != NULL, "invariant");
5630
5631 // Generate any default methods - default methods are public interface methods
5632 // that have a default implementation. This is new with Java 8.
5633 if (_has_nonstatic_concrete_methods) {
5634 DefaultMethods::generate_default_methods(ik,
5635 _all_mirandas,
5636 CHECK);
5637 }
5638
5639 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5640 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5641 !module_entry->has_default_read_edges()) {
5642 if (!module_entry->set_has_default_read_edges()) {
5643 // We won a potential race
5644 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5645 }
5646 }
5647
5648 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5649
5650 if (!is_internal()) {
5651 if (log_is_enabled(Info, class, load)) {
5652 ResourceMark rm;
5653 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5654 ik->print_class_load_logging(_loader_data, module_name, _stream);
5655 }
5656
5657 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5658 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5659 log_is_enabled(Info, class, preview)) {
5660 ResourceMark rm;
5661 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5662 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5663 }
5664
5665 if (log_is_enabled(Debug, class, resolve)) {
5666 ResourceMark rm;
5667 // print out the superclass.
5668 const char * from = ik->external_name();
5669 if (ik->java_super() != NULL) {
5670 log_debug(class, resolve)("%s %s (super)",
5671 from,
5672 ik->java_super()->external_name());
5673 }
5674 // print out each of the interface classes referred to by this class.
5675 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5676 if (local_interfaces != NULL) {
5677 const int length = local_interfaces->length();
5678 for (int i = 0; i < length; i++) {
5679 const InstanceKlass* const k = local_interfaces->at(i);
5680 const char * to = k->external_name();
5681 log_debug(class, resolve)("%s %s (interface)", from, to);
5682 }
5683 }
5684 }
5685 }
5686
5687 JFR_ONLY(INIT_ID(ik);)
5688
5689 // If we reach here, all is well.
5690 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5691 // in order for it to not be destroyed in the ClassFileParser destructor.
5692 set_klass_to_deallocate(NULL);
5693
5694 // it's official
5695 set_klass(ik);
5696
5697 debug_only(ik->verify();)
5698 }
5699
5700 // For an unsafe anonymous class that is in the unnamed package, move it to its host class's
5701 // package by prepending its host class's package name to its class name and setting
5702 // its _class_name field.
5703 void ClassFileParser::prepend_host_package_name(const InstanceKlass* unsafe_anonymous_host, TRAPS) {
5704 ResourceMark rm(THREAD);
5705 assert(strrchr(_class_name->as_C_string(), JVM_SIGNATURE_SLASH) == NULL,
5706 "Unsafe anonymous class should not be in a package");
5707 const char* host_pkg_name =
5708 ClassLoader::package_from_name(unsafe_anonymous_host->name()->as_C_string(), NULL);
5709
5710 if (host_pkg_name != NULL) {
5711 int host_pkg_len = (int)strlen(host_pkg_name);
5712 int class_name_len = _class_name->utf8_length();
5713 int symbol_len = host_pkg_len + 1 + class_name_len;
5714 char* new_anon_name = NEW_RESOURCE_ARRAY(char, symbol_len + 1);
5715 int n = os::snprintf(new_anon_name, symbol_len + 1, "%s/%.*s",
5716 host_pkg_name, class_name_len, _class_name->base());
5717 assert(n == symbol_len, "Unexpected number of characters in string");
5718
5719 // Decrement old _class_name to avoid leaking.
5720 _class_name->decrement_refcount();
5721
5722 // Create a symbol and update the anonymous class name.
5723 // The new class name is created with a refcount of one. When installed into the InstanceKlass,
5724 // it'll be two and when the ClassFileParser destructor runs, it'll go back to one and get deleted
5725 // when the class is unloaded.
5726 _class_name = SymbolTable::new_symbol(new_anon_name, symbol_len);
5727 }
5728 }
5729
5730 // If the host class and the anonymous class are in the same package then do
5731 // nothing. If the anonymous class is in the unnamed package then move it to its
5732 // host's package. If the classes are in different packages then throw an IAE
5733 // exception.
5734 void ClassFileParser::fix_unsafe_anonymous_class_name(TRAPS) {
5735 assert(_unsafe_anonymous_host != NULL, "Expected an unsafe anonymous class");
5736
5737 const jbyte* anon_last_slash = UTF8::strrchr((const jbyte*)_class_name->base(),
5738 _class_name->utf8_length(), JVM_SIGNATURE_SLASH);
5739 if (anon_last_slash == NULL) { // Unnamed package
5740 prepend_host_package_name(_unsafe_anonymous_host, CHECK);
5741 } else {
5742 if (!_unsafe_anonymous_host->is_same_class_package(_unsafe_anonymous_host->class_loader(), _class_name)) {
5743 ResourceMark rm(THREAD);
5744 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5745 err_msg("Host class %s and anonymous class %s are in different packages",
5746 _unsafe_anonymous_host->name()->as_C_string(), _class_name->as_C_string()));
5747 }
5748 }
5749 }
5750
5751 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5752 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5753 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5754 bool need_verify =
5755 // verifyAll
5756 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5757 // verifyRemote
5758 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5759 return !need_verify;
5760 }
5761
5762 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5763 Symbol* name,
5764 ClassLoaderData* loader_data,
5765 Handle protection_domain,
5766 const InstanceKlass* unsafe_anonymous_host,
5767 GrowableArray<Handle>* cp_patches,
5768 const bool is_hidden,
5769 const bool can_access_vm_annotations,
5770 Publicity pub_level,
5771 TRAPS) :
5772 _stream(stream),
5773 _class_name(NULL),
5774 _loader_data(loader_data),
5775 _unsafe_anonymous_host(unsafe_anonymous_host),
5776 _cp_patches(cp_patches),
5777 _is_hidden(is_hidden),
5778 _can_access_vm_annotations(can_access_vm_annotations),
5779 _num_patched_klasses(0),
5780 _max_num_patched_klasses(0),
5781 _orig_cp_size(0),
5782 _first_patched_klass_resolved_index(0),
5783 _super_klass(),
5784 _cp(NULL),
5785 _fields(NULL),
5786 _methods(NULL),
5787 _inner_classes(NULL),
5788 _nest_members(NULL),
5789 _nest_host(0),
5790 _local_interfaces(NULL),
5791 _transitive_interfaces(NULL),
5792 _combined_annotations(NULL),
5793 _class_annotations(NULL),
5794 _class_type_annotations(NULL),
5795 _fields_annotations(NULL),
5796 _fields_type_annotations(NULL),
5797 _klass(NULL),
5798 _klass_to_deallocate(NULL),
5799 _parsed_annotations(NULL),
5800 _fac(NULL),
5801 _field_info(NULL),
5802 _method_ordering(NULL),
5803 _all_mirandas(NULL),
5804 _vtable_size(0),
5805 _itable_size(0),
5806 _num_miranda_methods(0),
5807 _rt(REF_NONE),
5808 _protection_domain(protection_domain),
5809 _access_flags(),
5810 _pub_level(pub_level),
5811 _bad_constant_seen(0),
5812 _synthetic_flag(false),
5813 _sde_length(false),
5814 _sde_buffer(NULL),
5815 _sourcefile_index(0),
5816 _generic_signature_index(0),
5817 _major_version(0),
5818 _minor_version(0),
5819 _this_class_index(0),
5820 _super_class_index(0),
5821 _itfs_len(0),
5822 _java_fields_count(0),
5823 _need_verify(false),
5824 _relax_verify(false),
5825 _has_nonstatic_concrete_methods(false),
5826 _declares_nonstatic_concrete_methods(false),
5827 _has_final_method(false),
5828 _has_finalizer(false),
5829 _has_empty_finalizer(false),
5830 _has_vanilla_constructor(false),
5831 _max_bootstrap_specifier_index(-1) {
5832
5833 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5834 _class_name->increment_refcount();
5835
5836 assert(THREAD->is_Java_thread(), "invariant");
5837 assert(_loader_data != NULL, "invariant");
5838 assert(stream != NULL, "invariant");
5839 assert(_stream != NULL, "invariant");
5840 assert(_stream->buffer() == _stream->current(), "invariant");
5841 assert(_class_name != NULL, "invariant");
5842 assert(0 == _access_flags.as_int(), "invariant");
5843
5844 // Figure out whether we can skip format checking (matching classic VM behavior)
5845 if (DumpSharedSpaces) {
5846 // verify == true means it's a 'remote' class (i.e., non-boot class)
5847 // Verification decision is based on BytecodeVerificationRemote flag
5848 // for those classes.
5849 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5850 BytecodeVerificationLocal;
5851 }
5852 else {
5853 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5854 stream->need_verify());
5855 }
5856 if (_cp_patches != NULL) {
5857 int len = _cp_patches->length();
5858 for (int i=0; i<len; i++) {
5859 if (has_cp_patch_at(i)) {
5860 Handle patch = cp_patch_at(i);
5861 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5862 // We need to append the names of the patched classes to the end of the constant pool,
5863 // because a patched class may have a Utf8 name that's not already included in the
5864 // original constant pool. These class names are used when patch_constant_pool()
5865 // calls patch_class().
5866 //
5867 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5868 // At this point, we don't know the tag for index i yet, because we haven't parsed the
5869 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5870 _max_num_patched_klasses++;
5871 }
5872 }
5873 }
5874 }
5875
5876 // synch back verification state to stream
5877 stream->set_verify(_need_verify);
5878
5879 // Check if verification needs to be relaxed for this class file
5880 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5881 _relax_verify = relax_format_check_for(_loader_data);
5882
5883 parse_stream(stream, CHECK);
5884
5885 post_process_parsed_stream(stream, _cp, CHECK);
5886 }
5887
5888 void ClassFileParser::clear_class_metadata() {
5889 // metadata created before the instance klass is created. Must be
5890 // deallocated if classfile parsing returns an error.
5891 _cp = NULL;
5892 _fields = NULL;
5893 _methods = NULL;
5894 _inner_classes = NULL;
5895 _nest_members = NULL;
5896 _local_interfaces = NULL;
5897 _combined_annotations = NULL;
5898 _class_annotations = _class_type_annotations = NULL;
5899 _fields_annotations = _fields_type_annotations = NULL;
5900 }
5901
5902 // Destructor to clean up
5903 ClassFileParser::~ClassFileParser() {
5904 _class_name->decrement_refcount();
5905
5906 if (_cp != NULL) {
5907 MetadataFactory::free_metadata(_loader_data, _cp);
5908 }
5909 if (_fields != NULL) {
5910 MetadataFactory::free_array<u2>(_loader_data, _fields);
5911 }
5912
5913 if (_methods != NULL) {
5914 // Free methods
5915 InstanceKlass::deallocate_methods(_loader_data, _methods);
5916 }
5917
5918 // beware of the Universe::empty_blah_array!!
5919 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5920 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5921 }
5922
5923 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
5924 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5925 }
5926
5927 // Free interfaces
5928 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5929 _local_interfaces, _transitive_interfaces);
5930
5931 if (_combined_annotations != NULL) {
5932 // After all annotations arrays have been created, they are installed into the
5933 // Annotations object that will be assigned to the InstanceKlass being created.
5934
5935 // Deallocate the Annotations object and the installed annotations arrays.
5936 _combined_annotations->deallocate_contents(_loader_data);
5937
5938 // If the _combined_annotations pointer is non-NULL,
5939 // then the other annotations fields should have been cleared.
5940 assert(_class_annotations == NULL, "Should have been cleared");
5941 assert(_class_type_annotations == NULL, "Should have been cleared");
5942 assert(_fields_annotations == NULL, "Should have been cleared");
5943 assert(_fields_type_annotations == NULL, "Should have been cleared");
5944 } else {
5945 // If the annotations arrays were not installed into the Annotations object,
5946 // then they have to be deallocated explicitly.
5947 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
5948 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
5949 Annotations::free_contents(_loader_data, _fields_annotations);
5950 Annotations::free_contents(_loader_data, _fields_type_annotations);
5951 }
5952
5953 clear_class_metadata();
5954 _transitive_interfaces = NULL;
5955
5956 // deallocate the klass if already created. Don't directly deallocate, but add
5957 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5958 // at a safepoint.
5959 if (_klass_to_deallocate != NULL) {
5960 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5961 }
5962 }
5963
5964 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5965 TRAPS) {
5966
5967 assert(stream != NULL, "invariant");
5968 assert(_class_name != NULL, "invariant");
5969
5970 // BEGIN STREAM PARSING
5971 stream->guarantee_more(8, CHECK); // magic, major, minor
5972 // Magic value
5973 const u4 magic = stream->get_u4_fast();
5974 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5975 "Incompatible magic value %u in class file %s",
5976 magic, CHECK);
5977
5978 // Version numbers
5979 _minor_version = stream->get_u2_fast();
5980 _major_version = stream->get_u2_fast();
5981
5982 if (DumpSharedSpaces && _major_version < JAVA_6_VERSION) {
5983 ResourceMark rm;
5984 warning("Pre JDK 6 class not supported by CDS: %u.%u %s",
5985 _major_version, _minor_version, _class_name->as_C_string());
5986 Exceptions::fthrow(
5987 THREAD_AND_LOCATION,
5988 vmSymbols::java_lang_UnsupportedClassVersionError(),
5989 "Unsupported major.minor version for dump time %u.%u",
5990 _major_version,
5991 _minor_version);
5992 }
5993
5994 // Check version numbers - we check this even with verifier off
5995 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
5996
5997 stream->guarantee_more(3, CHECK); // length, first cp tag
5998 u2 cp_size = stream->get_u2_fast();
5999
6000 guarantee_property(
6001 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6002 cp_size, CHECK);
6003
6004 _orig_cp_size = cp_size;
6005 if (is_hidden()) { // Add a slot for hidden class name.
6006 assert(_max_num_patched_klasses == 0, "Sanity check");
6007 cp_size++;
6008 } else {
6009 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6010 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6011 }
6012 cp_size += _max_num_patched_klasses;
6013 }
6014
6015 _cp = ConstantPool::allocate(_loader_data,
6016 cp_size,
6017 CHECK);
6018
6019 ConstantPool* const cp = _cp;
6020
6021 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6022
6023 assert(cp_size == (const u2)cp->length(), "invariant");
6024
6025 // ACCESS FLAGS
6026 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6027
6028 // Access flags
6029 jint flags;
6030 // JVM_ACC_MODULE is defined in JDK-9 and later.
6031 if (_major_version >= JAVA_9_VERSION) {
6032 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
6033 } else {
6034 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
6035 }
6036
6037 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6038 // Set abstract bit for old class files for backward compatibility
6039 flags |= JVM_ACC_ABSTRACT;
6040 }
6041
6042 verify_legal_class_modifiers(flags, CHECK);
6043
6044 short bad_constant = class_bad_constant_seen();
6045 if (bad_constant != 0) {
6046 // Do not throw CFE until after the access_flags are checked because if
6047 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6048 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6049 }
6050
6051 _access_flags.set_flags(flags);
6052
6053 // This class and superclass
6054 _this_class_index = stream->get_u2_fast();
6055 check_property(
6056 valid_cp_range(_this_class_index, cp_size) &&
6057 cp->tag_at(_this_class_index).is_unresolved_klass(),
6058 "Invalid this class index %u in constant pool in class file %s",
6059 _this_class_index, CHECK);
6060
6061 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6062 assert(class_name_in_cp != NULL, "class_name can't be null");
6063
6064 // Don't need to check whether this class name is legal or not.
6065 // It has been checked when constant pool is parsed.
6066 // However, make sure it is not an array type.
6067 if (_need_verify) {
6068 guarantee_property(class_name_in_cp->char_at(0) != JVM_SIGNATURE_ARRAY,
6069 "Bad class name in class file %s",
6070 CHECK);
6071 }
6072
6073 #ifdef ASSERT
6074 // Basic sanity checks
6075 assert(!(_is_hidden && (_unsafe_anonymous_host != NULL)), "mutually exclusive variants");
6076
6077 if (_unsafe_anonymous_host != NULL) {
6078 assert(_class_name == vmSymbols::unknown_class_name(), "A named anonymous class???");
6079 }
6080 if (_is_hidden) {
6081 assert(_class_name != vmSymbols::unknown_class_name(), "hidden classes should have a special name");
6082 }
6083 #endif
6084
6085 // Update the _class_name as needed depending on whether this is a named,
6086 // un-named, hidden or unsafe-anonymous class.
6087
6088 if (_is_hidden) {
6089 ResourceMark rm(THREAD);
6090 assert(_class_name != NULL, "Unexpected null _class_name");
6091 #ifdef ASSERT
6092 if (_need_verify) {
6093 verify_legal_class_name(_class_name, CHECK);
6094 }
6095 #endif
6096
6097 // Construct hidden name from _class_name, "+", and &_cp. Note that we can't
6098 // use a '/' because that confuses finding the class's package. Also, can't
6099 // use an illegal char such as ';' because that causes serialization issues
6100 // and issues with hidden classes that create their own hidden classes.
6101 char addr_buf[20];
6102 jio_snprintf(addr_buf, 20, INTPTR_FORMAT, p2i(_cp));
6103 size_t new_name_len = _class_name->utf8_length() + 2 + strlen(addr_buf);
6104 char* new_name = NEW_RESOURCE_ARRAY(char, new_name_len);
6105 jio_snprintf(new_name, new_name_len, "%s+%s",
6106 _class_name->as_C_string(), addr_buf);
6107 _class_name->decrement_refcount();
6108 _class_name = SymbolTable::new_symbol(new_name);
6109 _class_name->increment_refcount();
6110
6111 // Add a Utf8 entry containing the hidden name.
6112 assert(_class_name != NULL, "Unexpected null _class_name");
6113 int hidden_index = _orig_cp_size; // this is an extra slot we added
6114 cp->symbol_at_put(hidden_index, _class_name);
6115
6116 // Update this_class_index's slot in the constant pool with the new Utf8 entry.
6117 // We have to update the resolved_klass_index and the name_index together
6118 // so extract the existing resolved_klass_index first.
6119 CPKlassSlot cp_klass_slot = cp->klass_slot_at(_this_class_index);
6120 int resolved_klass_index = cp_klass_slot.resolved_klass_index();
6121 cp->unresolved_klass_at_put(_this_class_index, hidden_index, resolved_klass_index);
6122 assert(cp->klass_slot_at(_this_class_index).name_index() == _orig_cp_size,
6123 "Bad name_index");
6124
6125 // NOTE: !_is_hidden does not imply "findable" as it could be an old-style
6126 // "hidden" unsafe-anonymous class
6127
6128 // If this is an anonymous class fix up its name if it is in the unnamed
6129 // package. Otherwise, throw IAE if it is in a different package than
6130 // its host class.
6131 } else if (_unsafe_anonymous_host != NULL) {
6132 Symbol* old_class_name = _class_name;
6133 _class_name = class_name_in_cp;
6134 _class_name->increment_refcount();
6135 fix_unsafe_anonymous_class_name(CHECK);
6136 old_class_name->decrement_refcount();
6137
6138 } else {
6139 // Check if name in class file matches given name
6140 if (_class_name != class_name_in_cp) {
6141 if (_class_name != vmSymbols::unknown_class_name()) {
6142 ResourceMark rm(THREAD);
6143 Exceptions::fthrow(THREAD_AND_LOCATION,
6144 vmSymbols::java_lang_NoClassDefFoundError(),
6145 "%s (wrong name: %s)",
6146 class_name_in_cp->as_C_string(),
6147 _class_name->as_C_string()
6148 );
6149 return;
6150 } else {
6151 // The class name was not known by the caller so we set it from
6152 // the value in the CP.
6153 _class_name = class_name_in_cp;
6154 _class_name->increment_refcount();
6155 }
6156 // else nothing to do: the expected class name matches what is in the CP
6157 }
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 !_is_hidden &&
6183 _unsafe_anonymous_host == NULL) {
6184 // Only dump the classes that can be stored into CDS archive.
6185 // Hidden and unsafe anonymous classes such as generated LambdaForm classes are also not included.
6186 oop class_loader = _loader_data->class_loader();
6187 ResourceMark rm(THREAD);
6188 bool skip = false;
6189 if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6190 // For the boot and platform class loaders, skip classes that are not found in the
6191 // java runtime image, such as those found in the --patch-module entries.
6192 // These classes can't be loaded from the archive during runtime.
6193 if (!stream->from_boot_loader_modules_image() && strncmp(stream->source(), "jrt:", 4) != 0) {
6194 skip = true;
6195 }
6196
6197 if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6198 // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6199 // as they can be loaded from the archive during runtime.
6200 skip = false;
6201 }
6202 }
6203 if (skip) {
6204 tty->print_cr("skip writing class %s from source %s to classlist file",
6205 _class_name->as_C_string(), stream->source());
6206 } else {
6207 classlist_file->print_cr("%s", _class_name->as_C_string());
6208 classlist_file->flush();
6209 }
6210 }
6211 }
6212 #endif
6213 }
6214
6215 // SUPERKLASS
6216 _super_class_index = stream->get_u2_fast();
6217 _super_klass = parse_super_class(cp,
6218 _super_class_index,
6219 _need_verify,
6220 CHECK);
6221
6222 // Interfaces
6223 _itfs_len = stream->get_u2_fast();
6224 parse_interfaces(stream,
6225 _itfs_len,
6226 cp,
6227 &_has_nonstatic_concrete_methods,
6228 CHECK);
6229
6230 assert(_local_interfaces != NULL, "invariant");
6231
6232 // Fields (offsets are filled in later)
6233 _fac = new FieldAllocationCount();
6234 parse_fields(stream,
6235 _access_flags.is_interface(),
6236 _fac,
6237 cp,
6238 cp_size,
6239 &_java_fields_count,
6240 CHECK);
6241
6242 assert(_fields != NULL, "invariant");
6243
6244 // Methods
6245 AccessFlags promoted_flags;
6246 parse_methods(stream,
6247 _access_flags.is_interface(),
6248 &promoted_flags,
6249 &_has_final_method,
6250 &_declares_nonstatic_concrete_methods,
6251 CHECK);
6252
6253 assert(_methods != NULL, "invariant");
6254
6255 // promote flags from parse_methods() to the klass' flags
6256 _access_flags.add_promoted_flags(promoted_flags.as_int());
6257
6258 if (_declares_nonstatic_concrete_methods) {
6259 _has_nonstatic_concrete_methods = true;
6260 }
6261
6262 // Additional attributes/annotations
6263 _parsed_annotations = new ClassAnnotationCollector();
6264 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6265
6266 assert(_inner_classes != NULL, "invariant");
6267
6268 // Finalize the Annotations metadata object,
6269 // now that all annotation arrays have been created.
6270 create_combined_annotations(CHECK);
6271
6272 // Make sure this is the end of class file stream
6273 guarantee_property(stream->at_eos(),
6274 "Extra bytes at the end of class file %s",
6275 CHECK);
6276
6277 // all bytes in stream read and parsed
6278 }
6279
6280 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6281 ConstantPool* cp,
6282 TRAPS) {
6283 assert(stream != NULL, "invariant");
6284 assert(stream->at_eos(), "invariant");
6285 assert(cp != NULL, "invariant");
6286 assert(_loader_data != NULL, "invariant");
6287
6288 if (_class_name == vmSymbols::java_lang_Object()) {
6289 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6290 "java.lang.Object cannot implement an interface in class file %s",
6291 CHECK);
6292 }
6293 // We check super class after class file is parsed and format is checked
6294 if (_super_class_index > 0 && NULL ==_super_klass) {
6295 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6296 if (_access_flags.is_interface()) {
6297 // Before attempting to resolve the superclass, check for class format
6298 // errors not checked yet.
6299 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6300 "Interfaces must have java.lang.Object as superclass in class file %s",
6301 CHECK);
6302 }
6303 Handle loader(THREAD, _loader_data->class_loader());
6304 _super_klass = (const InstanceKlass*)
6305 SystemDictionary::resolve_super_or_fail(_class_name,
6306 super_class_name,
6307 loader,
6308 _protection_domain,
6309 true,
6310 CHECK);
6311 }
6312
6313 if (_super_klass != NULL) {
6314 if (_super_klass->has_nonstatic_concrete_methods()) {
6315 _has_nonstatic_concrete_methods = true;
6316 }
6317
6318 if (_super_klass->is_interface()) {
6319 ResourceMark rm(THREAD);
6320 Exceptions::fthrow(
6321 THREAD_AND_LOCATION,
6322 vmSymbols::java_lang_IncompatibleClassChangeError(),
6323 "class %s has interface %s as super class",
6324 _class_name->as_klass_external_name(),
6325 _super_klass->external_name()
6326 );
6327 return;
6328 }
6329 // Make sure super class is not final
6330 if (_super_klass->is_final()) {
6331 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6332 }
6333 }
6334
6335 // Compute the transitive list of all unique interfaces implemented by this class
6336 _transitive_interfaces =
6337 compute_transitive_interfaces(_super_klass,
6338 _local_interfaces,
6339 _loader_data,
6340 CHECK);
6341
6342 assert(_transitive_interfaces != NULL, "invariant");
6343
6344 // sort methods
6345 _method_ordering = sort_methods(_methods);
6346
6347 _all_mirandas = new GrowableArray<Method*>(20);
6348
6349 Handle loader(THREAD, _loader_data->class_loader());
6350 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6351 &_num_miranda_methods,
6352 _all_mirandas,
6353 _super_klass,
6354 _methods,
6355 _access_flags,
6356 _major_version,
6357 loader,
6358 _class_name,
6359 _local_interfaces,
6360 CHECK);
6361
6362 // Size of Java itable (in words)
6363 _itable_size = _access_flags.is_interface() ? 0 :
6364 klassItable::compute_itable_size(_transitive_interfaces);
6365
6366 assert(_fac != NULL, "invariant");
6367 assert(_parsed_annotations != NULL, "invariant");
6368
6369 _field_info = new FieldLayoutInfo();
6370 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6371
6372 // Compute reference typ
6373 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6374
6375 }
6376
6377 void ClassFileParser::set_klass(InstanceKlass* klass) {
6378
6379 #ifdef ASSERT
6380 if (klass != NULL) {
6381 assert(NULL == _klass, "leaking?");
6382 }
6383 #endif
6384
6385 _klass = klass;
6386 }
6387
6388 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6389
6390 #ifdef ASSERT
6391 if (klass != NULL) {
6392 assert(NULL == _klass_to_deallocate, "leaking?");
6393 }
6394 #endif
6395
6396 _klass_to_deallocate = klass;
6397 }
6398
6399 // Caller responsible for ResourceMark
6400 // clone stream with rewound position
6401 const ClassFileStream* ClassFileParser::clone_stream() const {
6402 assert(_stream != NULL, "invariant");
6403
6404 return _stream->clone();
6405 }
6406 // ----------------------------------------------------------------------------
6407 // debugging
6408
6409 #ifdef ASSERT
6410
6411 // return true if class_name contains no '.' (internal format is '/')
6412 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6413 if (class_name != NULL) {
6414 ResourceMark rm;
6415 char* name = class_name->as_C_string();
6416 return strchr(name, JVM_SIGNATURE_DOT) == NULL;
6417 } else {
6418 return true;
6419 }
6420 }
6421
6422 #endif