1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24 #include "precompiled.hpp"
25 #include "jvm.h"
26 #include "aot/aotLoader.hpp"
27 #include "classfile/classFileParser.hpp"
28 #include "classfile/classFileStream.hpp"
29 #include "classfile/classLoader.hpp"
30 #include "classfile/classLoaderData.inline.hpp"
31 #include "classfile/defaultMethods.hpp"
32 #include "classfile/dictionary.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/moduleEntry.hpp"
35 #include "classfile/packageEntry.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/verificationType.hpp"
39 #include "classfile/verifier.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "logging/log.hpp"
42 #include "logging/logStream.hpp"
43 #include "memory/allocation.hpp"
44 #include "memory/metadataFactory.hpp"
45 #include "memory/oopFactory.hpp"
46 #include "memory/resourceArea.hpp"
47 #include "memory/universe.hpp"
48 #include "oops/annotations.hpp"
49 #include "oops/constantPool.inline.hpp"
50 #include "oops/fieldStreams.hpp"
51 #include "oops/instanceKlass.hpp"
52 #include "oops/instanceMirrorKlass.hpp"
53 #include "oops/klass.inline.hpp"
54 #include "oops/klassVtable.hpp"
55 #include "oops/metadata.hpp"
56 #include "oops/method.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/symbol.hpp"
59 #include "prims/jvmtiExport.hpp"
60 #include "prims/jvmtiThreadState.hpp"
61 #include "runtime/arguments.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/javaCalls.hpp"
64 #include "runtime/os.hpp"
65 #include "runtime/perfData.hpp"
66 #include "runtime/reflection.hpp"
67 #include "runtime/safepointVerifiers.hpp"
68 #include "runtime/signature.hpp"
69 #include "runtime/timer.hpp"
70 #include "services/classLoadingService.hpp"
71 #include "services/threadService.hpp"
72 #include "utilities/align.hpp"
73 #include "utilities/bitMap.inline.hpp"
74 #include "utilities/copy.hpp"
75 #include "utilities/exceptions.hpp"
76 #include "utilities/globalDefinitions.hpp"
77 #include "utilities/growableArray.hpp"
78 #include "utilities/macros.hpp"
79 #include "utilities/ostream.hpp"
80 #include "utilities/resourceHash.hpp"
81 #include "utilities/utf8.hpp"
82
83 #if INCLUDE_CDS
84 #include "classfile/systemDictionaryShared.hpp"
85 #endif
86 #if INCLUDE_JFR
87 #include "jfr/support/jfrTraceIdExtension.hpp"
88 #endif
89
90 // We generally try to create the oops directly when parsing, rather than
91 // allocating temporary data structures and copying the bytes twice. A
92 // temporary area is only needed when parsing utf8 entries in the constant
93 // pool and when parsing line number tables.
94
95 // We add assert in debug mode when class format is not checked.
96
97 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
98 #define JAVA_MIN_SUPPORTED_VERSION 45
99 #define JAVA_PREVIEW_MINOR_VERSION 65535
100
101 // Used for two backward compatibility reasons:
102 // - to check for new additions to the class file format in JDK1.5
103 // - to check for bug fixes in the format checker in JDK1.5
104 #define JAVA_1_5_VERSION 49
105
106 // Used for backward compatibility reasons:
107 // - to check for javac bug fixes that happened after 1.5
108 // - also used as the max version when running in jdk6
109 #define JAVA_6_VERSION 50
110
111 // Used for backward compatibility reasons:
112 // - to disallow argument and require ACC_STATIC for <clinit> methods
113 #define JAVA_7_VERSION 51
114
115 // Extension method support.
116 #define JAVA_8_VERSION 52
117
118 #define JAVA_9_VERSION 53
119
120 #define JAVA_10_VERSION 54
121
122 #define JAVA_11_VERSION 55
123
124 #define JAVA_12_VERSION 56
125
126 #define JAVA_13_VERSION 57
127
128 #define JAVA_14_VERSION 58
129
130 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
131 assert((bad_constant == JVM_CONSTANT_Module ||
132 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
133 "Unexpected bad constant pool entry");
134 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
135 }
136
137 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
138 ConstantPool* cp,
139 const int length,
140 TRAPS) {
141 assert(stream != NULL, "invariant");
142 assert(cp != NULL, "invariant");
143
144 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
145 // this function (_current can be allocated in a register, with scalar
146 // replacement of aggregates). The _current pointer is copied back to
147 // stream() when this function returns. DON'T call another method within
148 // this method that uses stream().
149 const ClassFileStream cfs1 = *stream;
150 const ClassFileStream* const cfs = &cfs1;
151
152 assert(cfs->allocated_on_stack(), "should be local");
153 debug_only(const u1* const old_current = stream->current();)
154
155 // Used for batching symbol allocations.
156 const char* names[SymbolTable::symbol_alloc_batch_size];
157 int lengths[SymbolTable::symbol_alloc_batch_size];
158 int indices[SymbolTable::symbol_alloc_batch_size];
159 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
160 int names_count = 0;
161
162 // parsing Index 0 is unused
163 for (int index = 1; index < length; index++) {
164 // Each of the following case guarantees one more byte in the stream
165 // for the following tag or the access_flags following constant pool,
166 // so we don't need bounds-check for reading tag.
167 const u1 tag = cfs->get_u1_fast();
168 switch (tag) {
169 case JVM_CONSTANT_Class : {
170 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
171 const u2 name_index = cfs->get_u2_fast();
172 cp->klass_index_at_put(index, name_index);
173 break;
174 }
175 case JVM_CONSTANT_Fieldref: {
176 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
177 const u2 class_index = cfs->get_u2_fast();
178 const u2 name_and_type_index = cfs->get_u2_fast();
179 cp->field_at_put(index, class_index, name_and_type_index);
180 break;
181 }
182 case JVM_CONSTANT_Methodref: {
183 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
184 const u2 class_index = cfs->get_u2_fast();
185 const u2 name_and_type_index = cfs->get_u2_fast();
186 cp->method_at_put(index, class_index, name_and_type_index);
187 break;
188 }
189 case JVM_CONSTANT_InterfaceMethodref: {
190 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
191 const u2 class_index = cfs->get_u2_fast();
192 const u2 name_and_type_index = cfs->get_u2_fast();
193 cp->interface_method_at_put(index, class_index, name_and_type_index);
194 break;
195 }
196 case JVM_CONSTANT_String : {
197 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
198 const u2 string_index = cfs->get_u2_fast();
199 cp->string_index_at_put(index, string_index);
200 break;
201 }
202 case JVM_CONSTANT_MethodHandle :
203 case JVM_CONSTANT_MethodType: {
204 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
205 classfile_parse_error(
206 "Class file version does not support constant tag %u in class file %s",
207 tag, CHECK);
208 }
209 if (tag == JVM_CONSTANT_MethodHandle) {
210 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
211 const u1 ref_kind = cfs->get_u1_fast();
212 const u2 method_index = cfs->get_u2_fast();
213 cp->method_handle_index_at_put(index, ref_kind, method_index);
214 }
215 else if (tag == JVM_CONSTANT_MethodType) {
216 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
217 const u2 signature_index = cfs->get_u2_fast();
218 cp->method_type_index_at_put(index, signature_index);
219 }
220 else {
221 ShouldNotReachHere();
222 }
223 break;
224 }
225 case JVM_CONSTANT_Dynamic : {
226 if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
227 classfile_parse_error(
228 "Class file version does not support constant tag %u in class file %s",
229 tag, CHECK);
230 }
231 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
232 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
233 const u2 name_and_type_index = cfs->get_u2_fast();
234 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
235 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
236 }
237 cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
238 break;
239 }
240 case JVM_CONSTANT_InvokeDynamic : {
241 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
242 classfile_parse_error(
243 "Class file version does not support constant tag %u in class file %s",
244 tag, CHECK);
245 }
246 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
247 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
248 const u2 name_and_type_index = cfs->get_u2_fast();
249 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
250 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
251 }
252 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
253 break;
254 }
255 case JVM_CONSTANT_Integer: {
256 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
257 const u4 bytes = cfs->get_u4_fast();
258 cp->int_at_put(index, (jint)bytes);
259 break;
260 }
261 case JVM_CONSTANT_Float: {
262 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
263 const u4 bytes = cfs->get_u4_fast();
264 cp->float_at_put(index, *(jfloat*)&bytes);
265 break;
266 }
267 case JVM_CONSTANT_Long: {
268 // A mangled type might cause you to overrun allocated memory
269 guarantee_property(index + 1 < length,
270 "Invalid constant pool entry %u in class file %s",
271 index,
272 CHECK);
273 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
274 const u8 bytes = cfs->get_u8_fast();
275 cp->long_at_put(index, bytes);
276 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
277 break;
278 }
279 case JVM_CONSTANT_Double: {
280 // A mangled type might cause you to overrun allocated memory
281 guarantee_property(index+1 < length,
282 "Invalid constant pool entry %u in class file %s",
283 index,
284 CHECK);
285 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
286 const u8 bytes = cfs->get_u8_fast();
287 cp->double_at_put(index, *(jdouble*)&bytes);
288 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
289 break;
290 }
291 case JVM_CONSTANT_NameAndType: {
292 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
293 const u2 name_index = cfs->get_u2_fast();
294 const u2 signature_index = cfs->get_u2_fast();
295 cp->name_and_type_at_put(index, name_index, signature_index);
296 break;
297 }
298 case JVM_CONSTANT_Utf8 : {
299 cfs->guarantee_more(2, CHECK); // utf8_length
300 u2 utf8_length = cfs->get_u2_fast();
301 const u1* utf8_buffer = cfs->current();
302 assert(utf8_buffer != NULL, "null utf8 buffer");
303 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
304 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
305 cfs->skip_u1_fast(utf8_length);
306
307 // Before storing the symbol, make sure it's legal
308 if (_need_verify) {
309 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
310 }
311
312 if (has_cp_patch_at(index)) {
313 Handle patch = clear_cp_patch_at(index);
314 guarantee_property(java_lang_String::is_instance(patch()),
315 "Illegal utf8 patch at %d in class file %s",
316 index,
317 CHECK);
318 const char* const str = java_lang_String::as_utf8_string(patch());
319 // (could use java_lang_String::as_symbol instead, but might as well batch them)
320 utf8_buffer = (const u1*) str;
321 utf8_length = (u2) strlen(str);
322 }
323
324 unsigned int hash;
325 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
326 utf8_length,
327 hash);
328 if (result == NULL) {
329 names[names_count] = (const char*)utf8_buffer;
330 lengths[names_count] = utf8_length;
331 indices[names_count] = index;
332 hashValues[names_count++] = hash;
333 if (names_count == SymbolTable::symbol_alloc_batch_size) {
334 SymbolTable::new_symbols(_loader_data,
335 cp,
336 names_count,
337 names,
338 lengths,
339 indices,
340 hashValues);
341 names_count = 0;
342 }
343 } else {
344 cp->symbol_at_put(index, result);
345 }
346 break;
347 }
348 case JVM_CONSTANT_Module:
349 case JVM_CONSTANT_Package: {
350 // Record that an error occurred in these two cases but keep parsing so
351 // that ACC_Module can be checked for in the access_flags. Need to
352 // throw NoClassDefFoundError in that case.
353 if (_major_version >= JAVA_9_VERSION) {
354 cfs->guarantee_more(3, CHECK);
355 cfs->get_u2_fast();
356 set_class_bad_constant_seen(tag);
357 break;
358 }
359 }
360 default: {
361 classfile_parse_error("Unknown constant tag %u in class file %s",
362 tag,
363 CHECK);
364 break;
365 }
366 } // end of switch(tag)
367 } // end of for
368
369 // Allocate the remaining symbols
370 if (names_count > 0) {
371 SymbolTable::new_symbols(_loader_data,
372 cp,
373 names_count,
374 names,
375 lengths,
376 indices,
377 hashValues);
378 }
379
380 // Copy _current pointer of local copy back to stream.
381 assert(stream->current() == old_current, "non-exclusive use of stream");
382 stream->set_current(cfs1.current());
383
384 }
385
386 static inline bool valid_cp_range(int index, int length) {
387 return (index > 0 && index < length);
388 }
389
390 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
391 assert(cp != NULL, "invariant");
392 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
393 return cp->symbol_at(index);
394 }
395 return NULL;
396 }
397
398 #ifdef ASSERT
399 PRAGMA_DIAG_PUSH
400 PRAGMA_FORMAT_NONLITERAL_IGNORED
401 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
402 ResourceMark rm(THREAD);
403 fatal(msg, _class_name->as_C_string());
404 }
405
406 void ClassFileParser::report_assert_property_failure(const char* msg,
407 int index,
408 TRAPS) const {
409 ResourceMark rm(THREAD);
410 fatal(msg, index, _class_name->as_C_string());
411 }
412 PRAGMA_DIAG_POP
413 #endif
414
415 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
416 ConstantPool* const cp,
417 const int length,
418 TRAPS) {
419 assert(cp != NULL, "invariant");
420 assert(stream != NULL, "invariant");
421
422 // parsing constant pool entries
423 parse_constant_pool_entries(stream, cp, length, CHECK);
424 if (class_bad_constant_seen() != 0) {
425 // a bad CP entry has been detected previously so stop parsing and just return.
426 return;
427 }
428
429 int index = 1; // declared outside of loops for portability
430 int num_klasses = 0;
431
432 // first verification pass - validate cross references
433 // and fixup class and string constants
434 for (index = 1; index < length; index++) { // Index 0 is unused
435 const jbyte tag = cp->tag_at(index).value();
436 switch (tag) {
437 case JVM_CONSTANT_Class: {
438 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
439 break;
440 }
441 case JVM_CONSTANT_Fieldref:
442 // fall through
443 case JVM_CONSTANT_Methodref:
444 // fall through
445 case JVM_CONSTANT_InterfaceMethodref: {
446 if (!_need_verify) break;
447 const int klass_ref_index = cp->klass_ref_index_at(index);
448 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
449 check_property(valid_klass_reference_at(klass_ref_index),
450 "Invalid constant pool index %u in class file %s",
451 klass_ref_index, CHECK);
452 check_property(valid_cp_range(name_and_type_ref_index, length) &&
453 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
454 "Invalid constant pool index %u in class file %s",
455 name_and_type_ref_index, CHECK);
456 break;
457 }
458 case JVM_CONSTANT_String: {
459 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
460 break;
461 }
462 case JVM_CONSTANT_Integer:
463 break;
464 case JVM_CONSTANT_Float:
465 break;
466 case JVM_CONSTANT_Long:
467 case JVM_CONSTANT_Double: {
468 index++;
469 check_property(
470 (index < length && cp->tag_at(index).is_invalid()),
471 "Improper constant pool long/double index %u in class file %s",
472 index, CHECK);
473 break;
474 }
475 case JVM_CONSTANT_NameAndType: {
476 if (!_need_verify) break;
477 const int name_ref_index = cp->name_ref_index_at(index);
478 const int signature_ref_index = cp->signature_ref_index_at(index);
479 check_property(valid_symbol_at(name_ref_index),
480 "Invalid constant pool index %u in class file %s",
481 name_ref_index, CHECK);
482 check_property(valid_symbol_at(signature_ref_index),
483 "Invalid constant pool index %u in class file %s",
484 signature_ref_index, CHECK);
485 break;
486 }
487 case JVM_CONSTANT_Utf8:
488 break;
489 case JVM_CONSTANT_UnresolvedClass: // fall-through
490 case JVM_CONSTANT_UnresolvedClassInError: {
491 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
492 break;
493 }
494 case JVM_CONSTANT_ClassIndex: {
495 const int class_index = cp->klass_index_at(index);
496 check_property(valid_symbol_at(class_index),
497 "Invalid constant pool index %u in class file %s",
498 class_index, CHECK);
499 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
500 break;
501 }
502 case JVM_CONSTANT_StringIndex: {
503 const int string_index = cp->string_index_at(index);
504 check_property(valid_symbol_at(string_index),
505 "Invalid constant pool index %u in class file %s",
506 string_index, CHECK);
507 Symbol* const sym = cp->symbol_at(string_index);
508 cp->unresolved_string_at_put(index, sym);
509 break;
510 }
511 case JVM_CONSTANT_MethodHandle: {
512 const int ref_index = cp->method_handle_index_at(index);
513 check_property(valid_cp_range(ref_index, length),
514 "Invalid constant pool index %u in class file %s",
515 ref_index, CHECK);
516 const constantTag tag = cp->tag_at(ref_index);
517 const int ref_kind = cp->method_handle_ref_kind_at(index);
518
519 switch (ref_kind) {
520 case JVM_REF_getField:
521 case JVM_REF_getStatic:
522 case JVM_REF_putField:
523 case JVM_REF_putStatic: {
524 check_property(
525 tag.is_field(),
526 "Invalid constant pool index %u in class file %s (not a field)",
527 ref_index, CHECK);
528 break;
529 }
530 case JVM_REF_invokeVirtual:
531 case JVM_REF_newInvokeSpecial: {
532 check_property(
533 tag.is_method(),
534 "Invalid constant pool index %u in class file %s (not a method)",
535 ref_index, CHECK);
536 break;
537 }
538 case JVM_REF_invokeStatic:
539 case JVM_REF_invokeSpecial: {
540 check_property(
541 tag.is_method() ||
542 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
543 "Invalid constant pool index %u in class file %s (not a method)",
544 ref_index, CHECK);
545 break;
546 }
547 case JVM_REF_invokeInterface: {
548 check_property(
549 tag.is_interface_method(),
550 "Invalid constant pool index %u in class file %s (not an interface method)",
551 ref_index, CHECK);
552 break;
553 }
554 default: {
555 classfile_parse_error(
556 "Bad method handle kind at constant pool index %u in class file %s",
557 index, CHECK);
558 }
559 } // switch(refkind)
560 // Keep the ref_index unchanged. It will be indirected at link-time.
561 break;
562 } // case MethodHandle
563 case JVM_CONSTANT_MethodType: {
564 const int ref_index = cp->method_type_index_at(index);
565 check_property(valid_symbol_at(ref_index),
566 "Invalid constant pool index %u in class file %s",
567 ref_index, CHECK);
568 break;
569 }
570 case JVM_CONSTANT_Dynamic: {
571 const int name_and_type_ref_index =
572 cp->bootstrap_name_and_type_ref_index_at(index);
573
574 check_property(valid_cp_range(name_and_type_ref_index, length) &&
575 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
576 "Invalid constant pool index %u in class file %s",
577 name_and_type_ref_index, CHECK);
578 // bootstrap specifier index must be checked later,
579 // when BootstrapMethods attr is available
580
581 // Mark the constant pool as having a CONSTANT_Dynamic_info structure
582 cp->set_has_dynamic_constant();
583 break;
584 }
585 case JVM_CONSTANT_InvokeDynamic: {
586 const int name_and_type_ref_index =
587 cp->bootstrap_name_and_type_ref_index_at(index);
588
589 check_property(valid_cp_range(name_and_type_ref_index, length) &&
590 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
591 "Invalid constant pool index %u in class file %s",
592 name_and_type_ref_index, CHECK);
593 // bootstrap specifier index must be checked later,
594 // when BootstrapMethods attr is available
595 break;
596 }
597 default: {
598 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
599 ShouldNotReachHere();
600 break;
601 }
602 } // switch(tag)
603 } // end of for
604
605 _first_patched_klass_resolved_index = num_klasses;
606 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
607
608 if (_cp_patches != NULL) {
609 // need to treat this_class specially...
610
611 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
612 // for now. These will be replaced with actual names of the patched classes in patch_class().
613 Symbol* s = vmSymbols::star_name();
614 for (int n=_orig_cp_size; n<cp->length(); n++) {
615 cp->symbol_at_put(n, s);
616 }
617
618 int this_class_index;
619 {
620 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
621 const u1* const mark = stream->current();
622 stream->skip_u2_fast(1); // skip flags
623 this_class_index = stream->get_u2_fast();
624 stream->set_current(mark); // revert to mark
625 }
626
627 for (index = 1; index < length; index++) { // Index 0 is unused
628 if (has_cp_patch_at(index)) {
629 guarantee_property(index != this_class_index,
630 "Illegal constant pool patch to self at %d in class file %s",
631 index, CHECK);
632 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
633 }
634 }
635 }
636
637 if (!_need_verify) {
638 return;
639 }
640
641 // second verification pass - checks the strings are of the right format.
642 // but not yet to the other entries
643 for (index = 1; index < length; index++) {
644 const jbyte tag = cp->tag_at(index).value();
645 switch (tag) {
646 case JVM_CONSTANT_UnresolvedClass: {
647 const Symbol* const class_name = cp->klass_name_at(index);
648 // check the name, even if _cp_patches will overwrite it
649 verify_legal_class_name(class_name, CHECK);
650 break;
651 }
652 case JVM_CONSTANT_NameAndType: {
653 if (_need_verify) {
654 const int sig_index = cp->signature_ref_index_at(index);
655 const int name_index = cp->name_ref_index_at(index);
656 const Symbol* const name = cp->symbol_at(name_index);
657 const Symbol* const sig = cp->symbol_at(sig_index);
658 guarantee_property(sig->utf8_length() != 0,
659 "Illegal zero length constant pool entry at %d in class %s",
660 sig_index, CHECK);
661 guarantee_property(name->utf8_length() != 0,
662 "Illegal zero length constant pool entry at %d in class %s",
663 name_index, CHECK);
664
665 if (sig->char_at(0) == JVM_SIGNATURE_FUNC) {
666 // Format check method name and signature
667 verify_legal_method_name(name, CHECK);
668 verify_legal_method_signature(name, sig, CHECK);
669 } else {
670 // Format check field name and signature
671 verify_legal_field_name(name, CHECK);
672 verify_legal_field_signature(name, sig, CHECK);
673 }
674 }
675 break;
676 }
677 case JVM_CONSTANT_Dynamic: {
678 const int name_and_type_ref_index =
679 cp->name_and_type_ref_index_at(index);
680 // already verified to be utf8
681 const int name_ref_index =
682 cp->name_ref_index_at(name_and_type_ref_index);
683 // already verified to be utf8
684 const int signature_ref_index =
685 cp->signature_ref_index_at(name_and_type_ref_index);
686 const Symbol* const name = cp->symbol_at(name_ref_index);
687 const Symbol* const signature = cp->symbol_at(signature_ref_index);
688 if (_need_verify) {
689 // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
690 // Need only to be sure signature is non-zero length and the right type.
691 if (signature->utf8_length() == 0 ||
692 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
693 throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
694 }
695 }
696 break;
697 }
698 case JVM_CONSTANT_InvokeDynamic:
699 case JVM_CONSTANT_Fieldref:
700 case JVM_CONSTANT_Methodref:
701 case JVM_CONSTANT_InterfaceMethodref: {
702 const int name_and_type_ref_index =
703 cp->name_and_type_ref_index_at(index);
704 // already verified to be utf8
705 const int name_ref_index =
706 cp->name_ref_index_at(name_and_type_ref_index);
707 // already verified to be utf8
708 const int signature_ref_index =
709 cp->signature_ref_index_at(name_and_type_ref_index);
710 const Symbol* const name = cp->symbol_at(name_ref_index);
711 const Symbol* const signature = cp->symbol_at(signature_ref_index);
712 if (tag == JVM_CONSTANT_Fieldref) {
713 if (_need_verify) {
714 // Field name and signature are verified above, when iterating NameAndType_info.
715 // Need only to be sure signature is non-zero length and the right type.
716 if (signature->utf8_length() == 0 ||
717 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
718 throwIllegalSignature("Field", name, signature, CHECK);
719 }
720 }
721 } else {
722 if (_need_verify) {
723 // Method name and signature are verified above, when iterating NameAndType_info.
724 // Need only to be sure signature is non-zero length and the right type.
725 if (signature->utf8_length() == 0 ||
726 signature->char_at(0) != JVM_SIGNATURE_FUNC) {
727 throwIllegalSignature("Method", name, signature, CHECK);
728 }
729 }
730 // 4509014: If a class method name begins with '<', it must be "<init>"
731 const unsigned int name_len = name->utf8_length();
732 if (tag == JVM_CONSTANT_Methodref &&
733 name_len != 0 &&
734 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
735 name != vmSymbols::object_initializer_name()) {
736 classfile_parse_error(
737 "Bad method name at constant pool index %u in class file %s",
738 name_ref_index, CHECK);
739 }
740 }
741 break;
742 }
743 case JVM_CONSTANT_MethodHandle: {
744 const int ref_index = cp->method_handle_index_at(index);
745 const int ref_kind = cp->method_handle_ref_kind_at(index);
746 switch (ref_kind) {
747 case JVM_REF_invokeVirtual:
748 case JVM_REF_invokeStatic:
749 case JVM_REF_invokeSpecial:
750 case JVM_REF_newInvokeSpecial: {
751 const int name_and_type_ref_index =
752 cp->name_and_type_ref_index_at(ref_index);
753 const int name_ref_index =
754 cp->name_ref_index_at(name_and_type_ref_index);
755 const Symbol* const name = cp->symbol_at(name_ref_index);
756 if (ref_kind == JVM_REF_newInvokeSpecial) {
757 if (name != vmSymbols::object_initializer_name()) {
758 classfile_parse_error(
759 "Bad constructor name at constant pool index %u in class file %s",
760 name_ref_index, CHECK);
761 }
762 } else {
763 if (name == vmSymbols::object_initializer_name()) {
764 classfile_parse_error(
765 "Bad method name at constant pool index %u in class file %s",
766 name_ref_index, CHECK);
767 }
768 }
769 break;
770 }
771 // Other ref_kinds are already fully checked in previous pass.
772 } // switch(ref_kind)
773 break;
774 }
775 case JVM_CONSTANT_MethodType: {
776 const Symbol* const no_name = vmSymbols::type_name(); // place holder
777 const Symbol* const signature = cp->method_type_signature_at(index);
778 verify_legal_method_signature(no_name, signature, CHECK);
779 break;
780 }
781 case JVM_CONSTANT_Utf8: {
782 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
783 }
784 } // switch(tag)
785 } // end of for
786 }
787
788 Handle ClassFileParser::clear_cp_patch_at(int index) {
789 Handle patch = cp_patch_at(index);
790 _cp_patches->at_put(index, Handle());
791 assert(!has_cp_patch_at(index), "");
792 return patch;
793 }
794
795 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
796 int name_index = _orig_cp_size + _num_patched_klasses;
797 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
798
799 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
800 _num_patched_klasses ++;
801 }
802
803 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
804 int index,
805 Handle patch,
806 TRAPS) {
807 assert(cp != NULL, "invariant");
808
809 BasicType patch_type = T_VOID;
810
811 switch (cp->tag_at(index).value()) {
812
813 case JVM_CONSTANT_UnresolvedClass: {
814 // Patching a class means pre-resolving it.
815 // The name in the constant pool is ignored.
816 if (java_lang_Class::is_instance(patch())) {
817 guarantee_property(!java_lang_Class::is_primitive(patch()),
818 "Illegal class patch at %d in class file %s",
819 index, CHECK);
820 Klass* k = java_lang_Class::as_Klass(patch());
821 patch_class(cp, index, k, k->name());
822 } else {
823 guarantee_property(java_lang_String::is_instance(patch()),
824 "Illegal class patch at %d in class file %s",
825 index, CHECK);
826 Symbol* const name = java_lang_String::as_symbol(patch());
827 patch_class(cp, index, NULL, name);
828 }
829 break;
830 }
831
832 case JVM_CONSTANT_String: {
833 // skip this patch and don't clear it. Needs the oop array for resolved
834 // references to be created first.
835 return;
836 }
837 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
838 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
839 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
840 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
841 patch_prim:
842 {
843 jvalue value;
844 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
845 guarantee_property(value_type == patch_type,
846 "Illegal primitive patch at %d in class file %s",
847 index, CHECK);
848 switch (value_type) {
849 case T_INT: cp->int_at_put(index, value.i); break;
850 case T_FLOAT: cp->float_at_put(index, value.f); break;
851 case T_LONG: cp->long_at_put(index, value.j); break;
852 case T_DOUBLE: cp->double_at_put(index, value.d); break;
853 default: assert(false, "");
854 }
855 } // end patch_prim label
856 break;
857
858 default: {
859 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
860 guarantee_property(!has_cp_patch_at(index),
861 "Illegal unexpected patch at %d in class file %s",
862 index, CHECK);
863 return;
864 }
865 } // end of switch(tag)
866
867 // On fall-through, mark the patch as used.
868 clear_cp_patch_at(index);
869 }
870 class NameSigHash: public ResourceObj {
871 public:
872 const Symbol* _name; // name
873 const Symbol* _sig; // signature
874 NameSigHash* _next; // Next entry in hash table
875 };
876
877 static const int HASH_ROW_SIZE = 256;
878
879 static unsigned int hash(const Symbol* name, const Symbol* sig) {
880 unsigned int raw_hash = 0;
881 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
882 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
883
884 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
885 }
886
887
888 static void initialize_hashtable(NameSigHash** table) {
889 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
890 }
891 // Return false if the name/sig combination is found in table.
892 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
893 // The old format checker uses heap sort to find duplicates.
894 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
895 // of table since we don't expect Symbol*'s to move.
896 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
897 assert(name != NULL, "name in constant pool is NULL");
898
899 // First lookup for duplicates
900 int index = hash(name, sig);
901 NameSigHash* entry = table[index];
902 while (entry != NULL) {
903 if (entry->_name == name && entry->_sig == sig) {
904 return false;
905 }
906 entry = entry->_next;
907 }
908
909 // No duplicate is found, allocate a new entry and fill it.
910 entry = new NameSigHash();
911 entry->_name = name;
912 entry->_sig = sig;
913
914 // Insert into hash table
915 entry->_next = table[index];
916 table[index] = entry;
917
918 return true;
919 }
920
921 // Side-effects: populates the _local_interfaces field
922 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
923 const int itfs_len,
924 ConstantPool* const cp,
925 bool* const has_nonstatic_concrete_methods,
926 TRAPS) {
927 assert(stream != NULL, "invariant");
928 assert(cp != NULL, "invariant");
929 assert(has_nonstatic_concrete_methods != NULL, "invariant");
930
931 if (itfs_len == 0) {
932 _local_interfaces = Universe::the_empty_instance_klass_array();
933 } else {
934 assert(itfs_len > 0, "only called for len>0");
935 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
936
937 int index;
938 for (index = 0; index < itfs_len; index++) {
939 const u2 interface_index = stream->get_u2(CHECK);
940 Klass* interf;
941 check_property(
942 valid_klass_reference_at(interface_index),
943 "Interface name has bad constant pool index %u in class file %s",
944 interface_index, CHECK);
945 if (cp->tag_at(interface_index).is_klass()) {
946 interf = cp->resolved_klass_at(interface_index);
947 } else {
948 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
949
950 // Don't need to check legal name because it's checked when parsing constant pool.
951 // But need to make sure it's not an array type.
952 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
953 "Bad interface name in class file %s", CHECK);
954
955 // Call resolve_super so classcircularity is checked
956 interf = SystemDictionary::resolve_super_or_fail(
957 _class_name,
958 unresolved_klass,
959 Handle(THREAD, _loader_data->class_loader()),
960 _protection_domain,
961 false,
962 CHECK);
963 }
964
965 if (!interf->is_interface()) {
966 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
967 err_msg("class %s can not implement %s, because it is not an interface (%s)",
968 _class_name->as_klass_external_name(),
969 interf->external_name(),
970 interf->class_in_module_of_loader()));
971 }
972
973 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
974 *has_nonstatic_concrete_methods = true;
975 }
976 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
977 }
978
979 if (!_need_verify || itfs_len <= 1) {
980 return;
981 }
982
983 // Check if there's any duplicates in interfaces
984 ResourceMark rm(THREAD);
985 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
986 NameSigHash*,
987 HASH_ROW_SIZE);
988 initialize_hashtable(interface_names);
989 bool dup = false;
990 const Symbol* name = NULL;
991 {
992 debug_only(NoSafepointVerifier nsv;)
993 for (index = 0; index < itfs_len; index++) {
994 const InstanceKlass* const k = _local_interfaces->at(index);
995 name = k->name();
996 // If no duplicates, add (name, NULL) in hashtable interface_names.
997 if (!put_after_lookup(name, NULL, interface_names)) {
998 dup = true;
999 break;
1000 }
1001 }
1002 }
1003 if (dup) {
1004 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
1005 name->as_C_string(), CHECK);
1006 }
1007 }
1008 }
1009
1010 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
1011 int constantvalue_index,
1012 int signature_index,
1013 TRAPS) const {
1014 // Make sure the constant pool entry is of a type appropriate to this field
1015 guarantee_property(
1016 (constantvalue_index > 0 &&
1017 constantvalue_index < cp->length()),
1018 "Bad initial value index %u in ConstantValue attribute in class file %s",
1019 constantvalue_index, CHECK);
1020
1021 const constantTag value_type = cp->tag_at(constantvalue_index);
1022 switch(cp->basic_type_for_signature_at(signature_index)) {
1023 case T_LONG: {
1024 guarantee_property(value_type.is_long(),
1025 "Inconsistent constant value type in class file %s",
1026 CHECK);
1027 break;
1028 }
1029 case T_FLOAT: {
1030 guarantee_property(value_type.is_float(),
1031 "Inconsistent constant value type in class file %s",
1032 CHECK);
1033 break;
1034 }
1035 case T_DOUBLE: {
1036 guarantee_property(value_type.is_double(),
1037 "Inconsistent constant value type in class file %s",
1038 CHECK);
1039 break;
1040 }
1041 case T_BYTE:
1042 case T_CHAR:
1043 case T_SHORT:
1044 case T_BOOLEAN:
1045 case T_INT: {
1046 guarantee_property(value_type.is_int(),
1047 "Inconsistent constant value type in class file %s",
1048 CHECK);
1049 break;
1050 }
1051 case T_OBJECT: {
1052 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1053 && value_type.is_string()),
1054 "Bad string initial value in class file %s",
1055 CHECK);
1056 break;
1057 }
1058 default: {
1059 classfile_parse_error("Unable to set initial value %u in class file %s",
1060 constantvalue_index,
1061 CHECK);
1062 }
1063 }
1064 }
1065
1066 class AnnotationCollector : public ResourceObj{
1067 public:
1068 enum Location { _in_field, _in_method, _in_class };
1069 enum ID {
1070 _unknown = 0,
1071 _method_CallerSensitive,
1072 _method_ForceInline,
1073 _method_DontInline,
1074 _method_InjectedProfile,
1075 _method_LambdaForm_Compiled,
1076 _method_Hidden,
1077 _method_HotSpotIntrinsicCandidate,
1078 _jdk_internal_vm_annotation_Contended,
1079 _field_Stable,
1080 _jdk_internal_vm_annotation_ReservedStackAccess,
1081 _annotation_LIMIT
1082 };
1083 const Location _location;
1084 int _annotations_present;
1085 u2 _contended_group;
1086
1087 AnnotationCollector(Location location)
1088 : _location(location), _annotations_present(0)
1089 {
1090 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1091 }
1092 // If this annotation name has an ID, report it (or _none).
1093 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1094 // Set the annotation name:
1095 void set_annotation(ID id) {
1096 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1097 _annotations_present |= nth_bit((int)id);
1098 }
1099
1100 void remove_annotation(ID id) {
1101 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1102 _annotations_present &= ~nth_bit((int)id);
1103 }
1104
1105 // Report if the annotation is present.
1106 bool has_any_annotations() const { return _annotations_present != 0; }
1107 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1108
1109 void set_contended_group(u2 group) { _contended_group = group; }
1110 u2 contended_group() const { return _contended_group; }
1111
1112 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1113
1114 void set_stable(bool stable) { set_annotation(_field_Stable); }
1115 bool is_stable() const { return has_annotation(_field_Stable); }
1116 };
1117
1118 // This class also doubles as a holder for metadata cleanup.
1119 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1120 private:
1121 ClassLoaderData* _loader_data;
1122 AnnotationArray* _field_annotations;
1123 AnnotationArray* _field_type_annotations;
1124 public:
1125 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1126 AnnotationCollector(_in_field),
1127 _loader_data(loader_data),
1128 _field_annotations(NULL),
1129 _field_type_annotations(NULL) {}
1130 ~FieldAnnotationCollector();
1131 void apply_to(FieldInfo* f);
1132 AnnotationArray* field_annotations() { return _field_annotations; }
1133 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1134
1135 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1136 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1137 };
1138
1139 class MethodAnnotationCollector : public AnnotationCollector{
1140 public:
1141 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1142 void apply_to(const methodHandle& m);
1143 };
1144
1145 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1146 public:
1147 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1148 void apply_to(InstanceKlass* ik);
1149 };
1150
1151
1152 static int skip_annotation_value(const u1*, int, int); // fwd decl
1153
1154 // Safely increment index by val if does not pass limit
1155 #define SAFE_ADD(index, limit, val) \
1156 if (index >= limit - val) return limit; \
1157 index += val;
1158
1159 // Skip an annotation. Return >=limit if there is any problem.
1160 static int skip_annotation(const u1* buffer, int limit, int index) {
1161 assert(buffer != NULL, "invariant");
1162 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1163 // value := switch (tag:u1) { ... }
1164 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1165 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1166 while (--nmem >= 0 && index < limit) {
1167 SAFE_ADD(index, limit, 2); // skip member
1168 index = skip_annotation_value(buffer, limit, index);
1169 }
1170 return index;
1171 }
1172
1173 // Skip an annotation value. Return >=limit if there is any problem.
1174 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1175 assert(buffer != NULL, "invariant");
1176
1177 // value := switch (tag:u1) {
1178 // case B, C, I, S, Z, D, F, J, c: con:u2;
1179 // case e: e_class:u2 e_name:u2;
1180 // case s: s_con:u2;
1181 // case [: do(nval:u2) {value};
1182 // case @: annotation;
1183 // case s: s_con:u2;
1184 // }
1185 SAFE_ADD(index, limit, 1); // read tag
1186 const u1 tag = buffer[index - 1];
1187 switch (tag) {
1188 case 'B':
1189 case 'C':
1190 case 'I':
1191 case 'S':
1192 case 'Z':
1193 case 'D':
1194 case 'F':
1195 case 'J':
1196 case 'c':
1197 case 's':
1198 SAFE_ADD(index, limit, 2); // skip con or s_con
1199 break;
1200 case 'e':
1201 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1202 break;
1203 case '[':
1204 {
1205 SAFE_ADD(index, limit, 2); // read nval
1206 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1207 while (--nval >= 0 && index < limit) {
1208 index = skip_annotation_value(buffer, limit, index);
1209 }
1210 }
1211 break;
1212 case '@':
1213 index = skip_annotation(buffer, limit, index);
1214 break;
1215 default:
1216 return limit; // bad tag byte
1217 }
1218 return index;
1219 }
1220
1221 // Sift through annotations, looking for those significant to the VM:
1222 static void parse_annotations(const ConstantPool* const cp,
1223 const u1* buffer, int limit,
1224 AnnotationCollector* coll,
1225 ClassLoaderData* loader_data,
1226 TRAPS) {
1227
1228 assert(cp != NULL, "invariant");
1229 assert(buffer != NULL, "invariant");
1230 assert(coll != NULL, "invariant");
1231 assert(loader_data != NULL, "invariant");
1232
1233 // annotations := do(nann:u2) {annotation}
1234 int index = 2; // read nann
1235 if (index >= limit) return;
1236 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1237 enum { // initial annotation layout
1238 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1239 count_off = 2, // u2 such as 1 (one value)
1240 member_off = 4, // utf8 such as 'value'
1241 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1242 e_tag_val = 'e',
1243 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1244 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1245 e_size = 11, // end of 'e' annotation
1246 c_tag_val = 'c', // payload is type
1247 c_con_off = 7, // utf8 payload, such as 'I'
1248 c_size = 9, // end of 'c' annotation
1249 s_tag_val = 's', // payload is String
1250 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1251 s_size = 9,
1252 min_size = 6 // smallest possible size (zero members)
1253 };
1254 // Cannot add min_size to index in case of overflow MAX_INT
1255 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1256 int index0 = index;
1257 index = skip_annotation(buffer, limit, index);
1258 const u1* const abase = buffer + index0;
1259 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1260 const int count = Bytes::get_Java_u2((address)abase + count_off);
1261 const Symbol* const aname = check_symbol_at(cp, atype);
1262 if (aname == NULL) break; // invalid annotation name
1263 const Symbol* member = NULL;
1264 if (count >= 1) {
1265 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1266 member = check_symbol_at(cp, member_index);
1267 if (member == NULL) break; // invalid member name
1268 }
1269
1270 // Here is where parsing particular annotations will take place.
1271 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1272 if (AnnotationCollector::_unknown == id) continue;
1273 coll->set_annotation(id);
1274
1275 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1276 // @Contended can optionally specify the contention group.
1277 //
1278 // Contended group defines the equivalence class over the fields:
1279 // the fields within the same contended group are not treated distinct.
1280 // The only exception is default group, which does not incur the
1281 // equivalence. Naturally, contention group for classes is meaningless.
1282 //
1283 // While the contention group is specified as String, annotation
1284 // values are already interned, and we might as well use the constant
1285 // pool index as the group tag.
1286 //
1287 u2 group_index = 0; // default contended group
1288 if (count == 1
1289 && s_size == (index - index0) // match size
1290 && s_tag_val == *(abase + tag_off)
1291 && member == vmSymbols::value_name()) {
1292 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1293 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1294 group_index = 0; // default contended group
1295 }
1296 }
1297 coll->set_contended_group(group_index);
1298 }
1299 }
1300 }
1301
1302
1303 // Parse attributes for a field.
1304 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1305 u2 attributes_count,
1306 bool is_static, u2 signature_index,
1307 u2* const constantvalue_index_addr,
1308 bool* const is_synthetic_addr,
1309 u2* const generic_signature_index_addr,
1310 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1311 TRAPS) {
1312 assert(cfs != NULL, "invariant");
1313 assert(constantvalue_index_addr != NULL, "invariant");
1314 assert(is_synthetic_addr != NULL, "invariant");
1315 assert(generic_signature_index_addr != NULL, "invariant");
1316 assert(parsed_annotations != NULL, "invariant");
1317 assert(attributes_count > 0, "attributes_count should be greater than 0");
1318
1319 u2 constantvalue_index = 0;
1320 u2 generic_signature_index = 0;
1321 bool is_synthetic = false;
1322 const u1* runtime_visible_annotations = NULL;
1323 int runtime_visible_annotations_length = 0;
1324 const u1* runtime_invisible_annotations = NULL;
1325 int runtime_invisible_annotations_length = 0;
1326 const u1* runtime_visible_type_annotations = NULL;
1327 int runtime_visible_type_annotations_length = 0;
1328 const u1* runtime_invisible_type_annotations = NULL;
1329 int runtime_invisible_type_annotations_length = 0;
1330 bool runtime_invisible_annotations_exists = false;
1331 bool runtime_invisible_type_annotations_exists = false;
1332 const ConstantPool* const cp = _cp;
1333
1334 while (attributes_count--) {
1335 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1336 const u2 attribute_name_index = cfs->get_u2_fast();
1337 const u4 attribute_length = cfs->get_u4_fast();
1338 check_property(valid_symbol_at(attribute_name_index),
1339 "Invalid field attribute index %u in class file %s",
1340 attribute_name_index,
1341 CHECK);
1342
1343 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1344 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1345 // ignore if non-static
1346 if (constantvalue_index != 0) {
1347 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1348 }
1349 check_property(
1350 attribute_length == 2,
1351 "Invalid ConstantValue field attribute length %u in class file %s",
1352 attribute_length, CHECK);
1353
1354 constantvalue_index = cfs->get_u2(CHECK);
1355 if (_need_verify) {
1356 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1357 }
1358 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1359 if (attribute_length != 0) {
1360 classfile_parse_error(
1361 "Invalid Synthetic field attribute length %u in class file %s",
1362 attribute_length, CHECK);
1363 }
1364 is_synthetic = true;
1365 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1366 if (attribute_length != 0) {
1367 classfile_parse_error(
1368 "Invalid Deprecated field attribute length %u in class file %s",
1369 attribute_length, CHECK);
1370 }
1371 } else if (_major_version >= JAVA_1_5_VERSION) {
1372 if (attribute_name == vmSymbols::tag_signature()) {
1373 if (generic_signature_index != 0) {
1374 classfile_parse_error(
1375 "Multiple Signature attributes for field in class file %s", CHECK);
1376 }
1377 if (attribute_length != 2) {
1378 classfile_parse_error(
1379 "Wrong size %u for field's Signature attribute in class file %s",
1380 attribute_length, CHECK);
1381 }
1382 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1383 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1384 if (runtime_visible_annotations != NULL) {
1385 classfile_parse_error(
1386 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1387 }
1388 runtime_visible_annotations_length = attribute_length;
1389 runtime_visible_annotations = cfs->current();
1390 assert(runtime_visible_annotations != NULL, "null visible annotations");
1391 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1392 parse_annotations(cp,
1393 runtime_visible_annotations,
1394 runtime_visible_annotations_length,
1395 parsed_annotations,
1396 _loader_data,
1397 CHECK);
1398 cfs->skip_u1_fast(runtime_visible_annotations_length);
1399 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1400 if (runtime_invisible_annotations_exists) {
1401 classfile_parse_error(
1402 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1403 }
1404 runtime_invisible_annotations_exists = true;
1405 if (PreserveAllAnnotations) {
1406 runtime_invisible_annotations_length = attribute_length;
1407 runtime_invisible_annotations = cfs->current();
1408 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1409 }
1410 cfs->skip_u1(attribute_length, CHECK);
1411 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1412 if (runtime_visible_type_annotations != NULL) {
1413 classfile_parse_error(
1414 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1415 }
1416 runtime_visible_type_annotations_length = attribute_length;
1417 runtime_visible_type_annotations = cfs->current();
1418 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1419 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1420 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1421 if (runtime_invisible_type_annotations_exists) {
1422 classfile_parse_error(
1423 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1424 } else {
1425 runtime_invisible_type_annotations_exists = true;
1426 }
1427 if (PreserveAllAnnotations) {
1428 runtime_invisible_type_annotations_length = attribute_length;
1429 runtime_invisible_type_annotations = cfs->current();
1430 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1431 }
1432 cfs->skip_u1(attribute_length, CHECK);
1433 } else {
1434 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1435 }
1436 } else {
1437 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1438 }
1439 }
1440
1441 *constantvalue_index_addr = constantvalue_index;
1442 *is_synthetic_addr = is_synthetic;
1443 *generic_signature_index_addr = generic_signature_index;
1444 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1445 runtime_visible_annotations_length,
1446 runtime_invisible_annotations,
1447 runtime_invisible_annotations_length,
1448 CHECK);
1449 parsed_annotations->set_field_annotations(a);
1450 a = assemble_annotations(runtime_visible_type_annotations,
1451 runtime_visible_type_annotations_length,
1452 runtime_invisible_type_annotations,
1453 runtime_invisible_type_annotations_length,
1454 CHECK);
1455 parsed_annotations->set_field_type_annotations(a);
1456 return;
1457 }
1458
1459
1460 // Field allocation types. Used for computing field offsets.
1461
1462 enum FieldAllocationType {
1463 STATIC_OOP, // Oops
1464 STATIC_BYTE, // Boolean, Byte, char
1465 STATIC_SHORT, // shorts
1466 STATIC_WORD, // ints
1467 STATIC_DOUBLE, // aligned long or double
1468 NONSTATIC_OOP,
1469 NONSTATIC_BYTE,
1470 NONSTATIC_SHORT,
1471 NONSTATIC_WORD,
1472 NONSTATIC_DOUBLE,
1473 MAX_FIELD_ALLOCATION_TYPE,
1474 BAD_ALLOCATION_TYPE = -1
1475 };
1476
1477 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1478 BAD_ALLOCATION_TYPE, // 0
1479 BAD_ALLOCATION_TYPE, // 1
1480 BAD_ALLOCATION_TYPE, // 2
1481 BAD_ALLOCATION_TYPE, // 3
1482 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1483 NONSTATIC_SHORT, // T_CHAR = 5,
1484 NONSTATIC_WORD, // T_FLOAT = 6,
1485 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1486 NONSTATIC_BYTE, // T_BYTE = 8,
1487 NONSTATIC_SHORT, // T_SHORT = 9,
1488 NONSTATIC_WORD, // T_INT = 10,
1489 NONSTATIC_DOUBLE, // T_LONG = 11,
1490 NONSTATIC_OOP, // T_OBJECT = 12,
1491 NONSTATIC_OOP, // T_ARRAY = 13,
1492 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1493 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1494 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1495 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1496 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1497 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1498 BAD_ALLOCATION_TYPE, // 0
1499 BAD_ALLOCATION_TYPE, // 1
1500 BAD_ALLOCATION_TYPE, // 2
1501 BAD_ALLOCATION_TYPE, // 3
1502 STATIC_BYTE , // T_BOOLEAN = 4,
1503 STATIC_SHORT, // T_CHAR = 5,
1504 STATIC_WORD, // T_FLOAT = 6,
1505 STATIC_DOUBLE, // T_DOUBLE = 7,
1506 STATIC_BYTE, // T_BYTE = 8,
1507 STATIC_SHORT, // T_SHORT = 9,
1508 STATIC_WORD, // T_INT = 10,
1509 STATIC_DOUBLE, // T_LONG = 11,
1510 STATIC_OOP, // T_OBJECT = 12,
1511 STATIC_OOP, // T_ARRAY = 13,
1512 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1513 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1514 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1515 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1516 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1517 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1518 };
1519
1520 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1521 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1522 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1523 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1524 return result;
1525 }
1526
1527 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1528 public:
1529 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1530
1531 FieldAllocationCount() {
1532 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1533 count[i] = 0;
1534 }
1535 }
1536
1537 FieldAllocationType update(bool is_static, BasicType type) {
1538 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1539 if (atype != BAD_ALLOCATION_TYPE) {
1540 // Make sure there is no overflow with injected fields.
1541 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1542 count[atype]++;
1543 }
1544 return atype;
1545 }
1546 };
1547
1548 // Side-effects: populates the _fields, _fields_annotations,
1549 // _fields_type_annotations fields
1550 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1551 bool is_interface,
1552 FieldAllocationCount* const fac,
1553 ConstantPool* cp,
1554 const int cp_size,
1555 u2* const java_fields_count_ptr,
1556 TRAPS) {
1557
1558 assert(cfs != NULL, "invariant");
1559 assert(fac != NULL, "invariant");
1560 assert(cp != NULL, "invariant");
1561 assert(java_fields_count_ptr != NULL, "invariant");
1562
1563 assert(NULL == _fields, "invariant");
1564 assert(NULL == _fields_annotations, "invariant");
1565 assert(NULL == _fields_type_annotations, "invariant");
1566
1567 cfs->guarantee_more(2, CHECK); // length
1568 const u2 length = cfs->get_u2_fast();
1569 *java_fields_count_ptr = length;
1570
1571 int num_injected = 0;
1572 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1573 &num_injected);
1574 const int total_fields = length + num_injected;
1575
1576 // The field array starts with tuples of shorts
1577 // [access, name index, sig index, initial value index, byte offset].
1578 // A generic signature slot only exists for field with generic
1579 // signature attribute. And the access flag is set with
1580 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1581 // signature slots are at the end of the field array and after all
1582 // other fields data.
1583 //
1584 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1585 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1586 // ...
1587 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1588 // [generic signature index]
1589 // [generic signature index]
1590 // ...
1591 //
1592 // Allocate a temporary resource array for field data. For each field,
1593 // a slot is reserved in the temporary array for the generic signature
1594 // index. After parsing all fields, the data are copied to a permanent
1595 // array and any unused slots will be discarded.
1596 ResourceMark rm(THREAD);
1597 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1598 u2,
1599 total_fields * (FieldInfo::field_slots + 1));
1600
1601 // The generic signature slots start after all other fields' data.
1602 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1603 int num_generic_signature = 0;
1604 for (int n = 0; n < length; n++) {
1605 // access_flags, name_index, descriptor_index, attributes_count
1606 cfs->guarantee_more(8, CHECK);
1607
1608 AccessFlags access_flags;
1609 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1610 verify_legal_field_modifiers(flags, is_interface, CHECK);
1611 access_flags.set_flags(flags);
1612
1613 const u2 name_index = cfs->get_u2_fast();
1614 check_property(valid_symbol_at(name_index),
1615 "Invalid constant pool index %u for field name in class file %s",
1616 name_index, CHECK);
1617 const Symbol* const name = cp->symbol_at(name_index);
1618 verify_legal_field_name(name, CHECK);
1619
1620 const u2 signature_index = cfs->get_u2_fast();
1621 check_property(valid_symbol_at(signature_index),
1622 "Invalid constant pool index %u for field signature in class file %s",
1623 signature_index, CHECK);
1624 const Symbol* const sig = cp->symbol_at(signature_index);
1625 verify_legal_field_signature(name, sig, CHECK);
1626
1627 u2 constantvalue_index = 0;
1628 bool is_synthetic = false;
1629 u2 generic_signature_index = 0;
1630 const bool is_static = access_flags.is_static();
1631 FieldAnnotationCollector parsed_annotations(_loader_data);
1632
1633 const u2 attributes_count = cfs->get_u2_fast();
1634 if (attributes_count > 0) {
1635 parse_field_attributes(cfs,
1636 attributes_count,
1637 is_static,
1638 signature_index,
1639 &constantvalue_index,
1640 &is_synthetic,
1641 &generic_signature_index,
1642 &parsed_annotations,
1643 CHECK);
1644
1645 if (parsed_annotations.field_annotations() != NULL) {
1646 if (_fields_annotations == NULL) {
1647 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1648 _loader_data, length, NULL,
1649 CHECK);
1650 }
1651 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1652 parsed_annotations.set_field_annotations(NULL);
1653 }
1654 if (parsed_annotations.field_type_annotations() != NULL) {
1655 if (_fields_type_annotations == NULL) {
1656 _fields_type_annotations =
1657 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1658 length,
1659 NULL,
1660 CHECK);
1661 }
1662 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1663 parsed_annotations.set_field_type_annotations(NULL);
1664 }
1665
1666 if (is_synthetic) {
1667 access_flags.set_is_synthetic();
1668 }
1669 if (generic_signature_index != 0) {
1670 access_flags.set_field_has_generic_signature();
1671 fa[generic_signature_slot] = generic_signature_index;
1672 generic_signature_slot ++;
1673 num_generic_signature ++;
1674 }
1675 }
1676
1677 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1678 field->initialize(access_flags.as_short(),
1679 name_index,
1680 signature_index,
1681 constantvalue_index);
1682 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1683
1684 // Remember how many oops we encountered and compute allocation type
1685 const FieldAllocationType atype = fac->update(is_static, type);
1686 field->set_allocation_type(atype);
1687
1688 // After field is initialized with type, we can augment it with aux info
1689 if (parsed_annotations.has_any_annotations())
1690 parsed_annotations.apply_to(field);
1691 }
1692
1693 int index = length;
1694 if (num_injected != 0) {
1695 for (int n = 0; n < num_injected; n++) {
1696 // Check for duplicates
1697 if (injected[n].may_be_java) {
1698 const Symbol* const name = injected[n].name();
1699 const Symbol* const signature = injected[n].signature();
1700 bool duplicate = false;
1701 for (int i = 0; i < length; i++) {
1702 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1703 if (name == cp->symbol_at(f->name_index()) &&
1704 signature == cp->symbol_at(f->signature_index())) {
1705 // Symbol is desclared in Java so skip this one
1706 duplicate = true;
1707 break;
1708 }
1709 }
1710 if (duplicate) {
1711 // These will be removed from the field array at the end
1712 continue;
1713 }
1714 }
1715
1716 // Injected field
1717 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1718 field->initialize(JVM_ACC_FIELD_INTERNAL,
1719 injected[n].name_index,
1720 injected[n].signature_index,
1721 0);
1722
1723 const BasicType type = FieldType::basic_type(injected[n].signature());
1724
1725 // Remember how many oops we encountered and compute allocation type
1726 const FieldAllocationType atype = fac->update(false, type);
1727 field->set_allocation_type(atype);
1728 index++;
1729 }
1730 }
1731
1732 assert(NULL == _fields, "invariant");
1733
1734 _fields =
1735 MetadataFactory::new_array<u2>(_loader_data,
1736 index * FieldInfo::field_slots + num_generic_signature,
1737 CHECK);
1738 // Sometimes injected fields already exist in the Java source so
1739 // the fields array could be too long. In that case the
1740 // fields array is trimed. Also unused slots that were reserved
1741 // for generic signature indexes are discarded.
1742 {
1743 int i = 0;
1744 for (; i < index * FieldInfo::field_slots; i++) {
1745 _fields->at_put(i, fa[i]);
1746 }
1747 for (int j = total_fields * FieldInfo::field_slots;
1748 j < generic_signature_slot; j++) {
1749 _fields->at_put(i++, fa[j]);
1750 }
1751 assert(_fields->length() == i, "");
1752 }
1753
1754 if (_need_verify && length > 1) {
1755 // Check duplicated fields
1756 ResourceMark rm(THREAD);
1757 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1758 THREAD, NameSigHash*, HASH_ROW_SIZE);
1759 initialize_hashtable(names_and_sigs);
1760 bool dup = false;
1761 const Symbol* name = NULL;
1762 const Symbol* sig = NULL;
1763 {
1764 debug_only(NoSafepointVerifier nsv;)
1765 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1766 name = fs.name();
1767 sig = fs.signature();
1768 // If no duplicates, add name/signature in hashtable names_and_sigs.
1769 if (!put_after_lookup(name, sig, names_and_sigs)) {
1770 dup = true;
1771 break;
1772 }
1773 }
1774 }
1775 if (dup) {
1776 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1777 name->as_C_string(), sig->as_klass_external_name(), CHECK);
1778 }
1779 }
1780 }
1781
1782
1783 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1784 u4 code_length,
1785 u4 exception_table_length,
1786 TRAPS) {
1787 assert(cfs != NULL, "invariant");
1788
1789 const unsafe_u2* const exception_table_start = cfs->current();
1790 assert(exception_table_start != NULL, "null exception table");
1791
1792 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1793 // end_pc,
1794 // handler_pc,
1795 // catch_type_index
1796
1797 // Will check legal target after parsing code array in verifier.
1798 if (_need_verify) {
1799 for (unsigned int i = 0; i < exception_table_length; i++) {
1800 const u2 start_pc = cfs->get_u2_fast();
1801 const u2 end_pc = cfs->get_u2_fast();
1802 const u2 handler_pc = cfs->get_u2_fast();
1803 const u2 catch_type_index = cfs->get_u2_fast();
1804 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1805 "Illegal exception table range in class file %s",
1806 CHECK_NULL);
1807 guarantee_property(handler_pc < code_length,
1808 "Illegal exception table handler in class file %s",
1809 CHECK_NULL);
1810 if (catch_type_index != 0) {
1811 guarantee_property(valid_klass_reference_at(catch_type_index),
1812 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1813 }
1814 }
1815 } else {
1816 cfs->skip_u2_fast(exception_table_length * 4);
1817 }
1818 return exception_table_start;
1819 }
1820
1821 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1822 u4 code_length,
1823 CompressedLineNumberWriteStream**const write_stream,
1824 TRAPS) {
1825
1826 const ClassFileStream* const cfs = _stream;
1827 unsigned int num_entries = cfs->get_u2(CHECK);
1828
1829 // Each entry is a u2 start_pc, and a u2 line_number
1830 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1831
1832 // Verify line number attribute and table length
1833 check_property(
1834 code_attribute_length == sizeof(u2) + length_in_bytes,
1835 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1836
1837 cfs->guarantee_more(length_in_bytes, CHECK);
1838
1839 if ((*write_stream) == NULL) {
1840 if (length_in_bytes > fixed_buffer_size) {
1841 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1842 } else {
1843 (*write_stream) = new CompressedLineNumberWriteStream(
1844 _linenumbertable_buffer, fixed_buffer_size);
1845 }
1846 }
1847
1848 while (num_entries-- > 0) {
1849 const u2 bci = cfs->get_u2_fast(); // start_pc
1850 const u2 line = cfs->get_u2_fast(); // line_number
1851 guarantee_property(bci < code_length,
1852 "Invalid pc in LineNumberTable in class file %s", CHECK);
1853 (*write_stream)->write_pair(bci, line);
1854 }
1855 }
1856
1857
1858 class LVT_Hash : public AllStatic {
1859 public:
1860
1861 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1862 /*
1863 * 3-tuple start_bci/length/slot has to be unique key,
1864 * so the following comparison seems to be redundant:
1865 * && elem->name_cp_index == entry->_elem->name_cp_index
1866 */
1867 return (e0.start_bci == e1.start_bci &&
1868 e0.length == e1.length &&
1869 e0.name_cp_index == e1.name_cp_index &&
1870 e0.slot == e1.slot);
1871 }
1872
1873 static unsigned int hash(LocalVariableTableElement const& e0) {
1874 unsigned int raw_hash = e0.start_bci;
1875
1876 raw_hash = e0.length + raw_hash * 37;
1877 raw_hash = e0.name_cp_index + raw_hash * 37;
1878 raw_hash = e0.slot + raw_hash * 37;
1879
1880 return raw_hash;
1881 }
1882 };
1883
1884
1885 // Class file LocalVariableTable elements.
1886 class Classfile_LVT_Element {
1887 public:
1888 u2 start_bci;
1889 u2 length;
1890 u2 name_cp_index;
1891 u2 descriptor_cp_index;
1892 u2 slot;
1893 };
1894
1895 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1896 LocalVariableTableElement* const lvt) {
1897 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1898 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1899 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1900 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1901 lvt->signature_cp_index = 0;
1902 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1903 }
1904
1905 // Function is used to parse both attributes:
1906 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1907 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1908 u4 code_length,
1909 u2 max_locals,
1910 u4 code_attribute_length,
1911 u2* const localvariable_table_length,
1912 bool isLVTT,
1913 TRAPS) {
1914 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1915 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1916 const unsigned int size =
1917 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1918
1919 const ConstantPool* const cp = _cp;
1920
1921 // Verify local variable table attribute has right length
1922 if (_need_verify) {
1923 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1924 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1925 }
1926
1927 const unsafe_u2* const localvariable_table_start = cfs->current();
1928 assert(localvariable_table_start != NULL, "null local variable table");
1929 if (!_need_verify) {
1930 cfs->skip_u2_fast(size);
1931 } else {
1932 cfs->guarantee_more(size * 2, CHECK_NULL);
1933 for(int i = 0; i < (*localvariable_table_length); i++) {
1934 const u2 start_pc = cfs->get_u2_fast();
1935 const u2 length = cfs->get_u2_fast();
1936 const u2 name_index = cfs->get_u2_fast();
1937 const u2 descriptor_index = cfs->get_u2_fast();
1938 const u2 index = cfs->get_u2_fast();
1939 // Assign to a u4 to avoid overflow
1940 const u4 end_pc = (u4)start_pc + (u4)length;
1941
1942 if (start_pc >= code_length) {
1943 classfile_parse_error(
1944 "Invalid start_pc %u in %s in class file %s",
1945 start_pc, tbl_name, CHECK_NULL);
1946 }
1947 if (end_pc > code_length) {
1948 classfile_parse_error(
1949 "Invalid length %u in %s in class file %s",
1950 length, tbl_name, CHECK_NULL);
1951 }
1952 const int cp_size = cp->length();
1953 guarantee_property(valid_symbol_at(name_index),
1954 "Name index %u in %s has bad constant type in class file %s",
1955 name_index, tbl_name, CHECK_NULL);
1956 guarantee_property(valid_symbol_at(descriptor_index),
1957 "Signature index %u in %s has bad constant type in class file %s",
1958 descriptor_index, tbl_name, CHECK_NULL);
1959
1960 const Symbol* const name = cp->symbol_at(name_index);
1961 const Symbol* const sig = cp->symbol_at(descriptor_index);
1962 verify_legal_field_name(name, CHECK_NULL);
1963 u2 extra_slot = 0;
1964 if (!isLVTT) {
1965 verify_legal_field_signature(name, sig, CHECK_NULL);
1966
1967 // 4894874: check special cases for double and long local variables
1968 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1969 sig == vmSymbols::type_signature(T_LONG)) {
1970 extra_slot = 1;
1971 }
1972 }
1973 guarantee_property((index + extra_slot) < max_locals,
1974 "Invalid index %u in %s in class file %s",
1975 index, tbl_name, CHECK_NULL);
1976 }
1977 }
1978 return localvariable_table_start;
1979 }
1980
1981 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1982 u4 code_attribute_length,
1983 bool need_verify,
1984 TRAPS) {
1985 assert(cfs != NULL, "invariant");
1986
1987 if (0 == code_attribute_length) {
1988 return NULL;
1989 }
1990
1991 const u1* const stackmap_table_start = cfs->current();
1992 assert(stackmap_table_start != NULL, "null stackmap table");
1993
1994 // check code_attribute_length first
1995 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1996
1997 if (!need_verify && !DumpSharedSpaces) {
1998 return NULL;
1999 }
2000 return stackmap_table_start;
2001 }
2002
2003 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2004 u2* const checked_exceptions_length,
2005 u4 method_attribute_length,
2006 TRAPS) {
2007 assert(cfs != NULL, "invariant");
2008 assert(checked_exceptions_length != NULL, "invariant");
2009
2010 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
2011 *checked_exceptions_length = cfs->get_u2_fast();
2012 const unsigned int size =
2013 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2014 const unsafe_u2* const checked_exceptions_start = cfs->current();
2015 assert(checked_exceptions_start != NULL, "null checked exceptions");
2016 if (!_need_verify) {
2017 cfs->skip_u2_fast(size);
2018 } else {
2019 // Verify each value in the checked exception table
2020 u2 checked_exception;
2021 const u2 len = *checked_exceptions_length;
2022 cfs->guarantee_more(2 * len, CHECK_NULL);
2023 for (int i = 0; i < len; i++) {
2024 checked_exception = cfs->get_u2_fast();
2025 check_property(
2026 valid_klass_reference_at(checked_exception),
2027 "Exception name has bad type at constant pool %u in class file %s",
2028 checked_exception, CHECK_NULL);
2029 }
2030 }
2031 // check exceptions attribute length
2032 if (_need_verify) {
2033 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2034 sizeof(u2) * size),
2035 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2036 }
2037 return checked_exceptions_start;
2038 }
2039
2040 void ClassFileParser::throwIllegalSignature(const char* type,
2041 const Symbol* name,
2042 const Symbol* sig,
2043 TRAPS) const {
2044 assert(name != NULL, "invariant");
2045 assert(sig != NULL, "invariant");
2046
2047 ResourceMark rm(THREAD);
2048 Exceptions::fthrow(THREAD_AND_LOCATION,
2049 vmSymbols::java_lang_ClassFormatError(),
2050 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2051 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2052 }
2053
2054 AnnotationCollector::ID
2055 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2056 const Symbol* name) {
2057 const vmSymbols::SID sid = vmSymbols::find_sid(name);
2058 // Privileged code can use all annotations. Other code silently drops some.
2059 const bool privileged = loader_data->is_the_null_class_loader_data() ||
2060 loader_data->is_platform_class_loader_data() ||
2061 loader_data->is_unsafe_anonymous();
2062 switch (sid) {
2063 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2064 if (_location != _in_method) break; // only allow for methods
2065 if (!privileged) break; // only allow in privileged code
2066 return _method_CallerSensitive;
2067 }
2068 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2069 if (_location != _in_method) break; // only allow for methods
2070 if (!privileged) break; // only allow in privileged code
2071 return _method_ForceInline;
2072 }
2073 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2074 if (_location != _in_method) break; // only allow for methods
2075 if (!privileged) break; // only allow in privileged code
2076 return _method_DontInline;
2077 }
2078 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2079 if (_location != _in_method) break; // only allow for methods
2080 if (!privileged) break; // only allow in privileged code
2081 return _method_InjectedProfile;
2082 }
2083 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2084 if (_location != _in_method) break; // only allow for methods
2085 if (!privileged) break; // only allow in privileged code
2086 return _method_LambdaForm_Compiled;
2087 }
2088 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2089 if (_location != _in_method) break; // only allow for methods
2090 if (!privileged) break; // only allow in privileged code
2091 return _method_Hidden;
2092 }
2093 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2094 if (_location != _in_method) break; // only allow for methods
2095 if (!privileged) break; // only allow in privileged code
2096 return _method_HotSpotIntrinsicCandidate;
2097 }
2098 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2099 if (_location != _in_field) break; // only allow for fields
2100 if (!privileged) break; // only allow in privileged code
2101 return _field_Stable;
2102 }
2103 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2104 if (_location != _in_field && _location != _in_class) {
2105 break; // only allow for fields and classes
2106 }
2107 if (!EnableContended || (RestrictContended && !privileged)) {
2108 break; // honor privileges
2109 }
2110 return _jdk_internal_vm_annotation_Contended;
2111 }
2112 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2113 if (_location != _in_method) break; // only allow for methods
2114 if (RestrictReservedStack && !privileged) break; // honor privileges
2115 return _jdk_internal_vm_annotation_ReservedStackAccess;
2116 }
2117 default: {
2118 break;
2119 }
2120 }
2121 return AnnotationCollector::_unknown;
2122 }
2123
2124 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2125 if (is_contended())
2126 f->set_contended_group(contended_group());
2127 if (is_stable())
2128 f->set_stable(true);
2129 }
2130
2131 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2132 // If there's an error deallocate metadata for field annotations
2133 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2134 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2135 }
2136
2137 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2138 if (has_annotation(_method_CallerSensitive))
2139 m->set_caller_sensitive(true);
2140 if (has_annotation(_method_ForceInline))
2141 m->set_force_inline(true);
2142 if (has_annotation(_method_DontInline))
2143 m->set_dont_inline(true);
2144 if (has_annotation(_method_InjectedProfile))
2145 m->set_has_injected_profile(true);
2146 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2147 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2148 if (has_annotation(_method_Hidden))
2149 m->set_hidden(true);
2150 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2151 m->set_intrinsic_candidate(true);
2152 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2153 m->set_has_reserved_stack_access(true);
2154 }
2155
2156 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2157 assert(ik != NULL, "invariant");
2158 ik->set_is_contended(is_contended());
2159 }
2160
2161 #define MAX_ARGS_SIZE 255
2162 #define MAX_CODE_SIZE 65535
2163 #define INITIAL_MAX_LVT_NUMBER 256
2164
2165 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2166 *
2167 * Rules for LVT's and LVTT's are:
2168 * - There can be any number of LVT's and LVTT's.
2169 * - If there are n LVT's, it is the same as if there was just
2170 * one LVT containing all the entries from the n LVT's.
2171 * - There may be no more than one LVT entry per local variable.
2172 * Two LVT entries are 'equal' if these fields are the same:
2173 * start_pc, length, name, slot
2174 * - There may be no more than one LVTT entry per each LVT entry.
2175 * Each LVTT entry has to match some LVT entry.
2176 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2177 */
2178 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2179 int lvt_cnt,
2180 u2* const localvariable_table_length,
2181 const unsafe_u2** const localvariable_table_start,
2182 int lvtt_cnt,
2183 u2* const localvariable_type_table_length,
2184 const unsafe_u2** const localvariable_type_table_start,
2185 TRAPS) {
2186
2187 ResourceMark rm(THREAD);
2188
2189 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2190 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2191
2192 LVT_HashTable* const table = new LVT_HashTable();
2193
2194 // To fill LocalVariableTable in
2195 const Classfile_LVT_Element* cf_lvt;
2196 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2197
2198 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2199 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2200 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2201 copy_lvt_element(&cf_lvt[idx], lvt);
2202 // If no duplicates, add LVT elem in hashtable.
2203 if (table->put(*lvt, lvt) == false
2204 && _need_verify
2205 && _major_version >= JAVA_1_5_VERSION) {
2206 classfile_parse_error("Duplicated LocalVariableTable attribute "
2207 "entry for '%s' in class file %s",
2208 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2209 CHECK);
2210 }
2211 }
2212 }
2213
2214 // To merge LocalVariableTable and LocalVariableTypeTable
2215 const Classfile_LVT_Element* cf_lvtt;
2216 LocalVariableTableElement lvtt_elem;
2217
2218 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2219 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2220 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2221 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2222 LocalVariableTableElement** entry = table->get(lvtt_elem);
2223 if (entry == NULL) {
2224 if (_need_verify) {
2225 classfile_parse_error("LVTT entry for '%s' in class file %s "
2226 "does not match any LVT entry",
2227 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2228 CHECK);
2229 }
2230 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2231 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2232 "entry for '%s' in class file %s",
2233 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2234 CHECK);
2235 } else {
2236 // to add generic signatures into LocalVariableTable
2237 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2238 }
2239 }
2240 }
2241 }
2242
2243
2244 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2245 const u1* runtime_visible_annotations,
2246 int runtime_visible_annotations_length,
2247 const u1* runtime_invisible_annotations,
2248 int runtime_invisible_annotations_length,
2249 const u1* runtime_visible_parameter_annotations,
2250 int runtime_visible_parameter_annotations_length,
2251 const u1* runtime_invisible_parameter_annotations,
2252 int runtime_invisible_parameter_annotations_length,
2253 const u1* runtime_visible_type_annotations,
2254 int runtime_visible_type_annotations_length,
2255 const u1* runtime_invisible_type_annotations,
2256 int runtime_invisible_type_annotations_length,
2257 const u1* annotation_default,
2258 int annotation_default_length,
2259 TRAPS) {
2260
2261 AnnotationArray* a;
2262
2263 if (runtime_visible_annotations_length +
2264 runtime_invisible_annotations_length > 0) {
2265 a = assemble_annotations(runtime_visible_annotations,
2266 runtime_visible_annotations_length,
2267 runtime_invisible_annotations,
2268 runtime_invisible_annotations_length,
2269 CHECK);
2270 cm->set_method_annotations(a);
2271 }
2272
2273 if (runtime_visible_parameter_annotations_length +
2274 runtime_invisible_parameter_annotations_length > 0) {
2275 a = assemble_annotations(runtime_visible_parameter_annotations,
2276 runtime_visible_parameter_annotations_length,
2277 runtime_invisible_parameter_annotations,
2278 runtime_invisible_parameter_annotations_length,
2279 CHECK);
2280 cm->set_parameter_annotations(a);
2281 }
2282
2283 if (annotation_default_length > 0) {
2284 a = assemble_annotations(annotation_default,
2285 annotation_default_length,
2286 NULL,
2287 0,
2288 CHECK);
2289 cm->set_default_annotations(a);
2290 }
2291
2292 if (runtime_visible_type_annotations_length +
2293 runtime_invisible_type_annotations_length > 0) {
2294 a = assemble_annotations(runtime_visible_type_annotations,
2295 runtime_visible_type_annotations_length,
2296 runtime_invisible_type_annotations,
2297 runtime_invisible_type_annotations_length,
2298 CHECK);
2299 cm->set_type_annotations(a);
2300 }
2301 }
2302
2303
2304 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2305 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2306 // Method* to save footprint, so we only know the size of the resulting Method* when the
2307 // entire method attribute is parsed.
2308 //
2309 // The promoted_flags parameter is used to pass relevant access_flags
2310 // from the method back up to the containing klass. These flag values
2311 // are added to klass's access_flags.
2312
2313 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2314 bool is_interface,
2315 const ConstantPool* cp,
2316 AccessFlags* const promoted_flags,
2317 TRAPS) {
2318 assert(cfs != NULL, "invariant");
2319 assert(cp != NULL, "invariant");
2320 assert(promoted_flags != NULL, "invariant");
2321
2322 ResourceMark rm(THREAD);
2323 // Parse fixed parts:
2324 // access_flags, name_index, descriptor_index, attributes_count
2325 cfs->guarantee_more(8, CHECK_NULL);
2326
2327 int flags = cfs->get_u2_fast();
2328 const u2 name_index = cfs->get_u2_fast();
2329 const int cp_size = cp->length();
2330 check_property(
2331 valid_symbol_at(name_index),
2332 "Illegal constant pool index %u for method name in class file %s",
2333 name_index, CHECK_NULL);
2334 const Symbol* const name = cp->symbol_at(name_index);
2335 verify_legal_method_name(name, CHECK_NULL);
2336
2337 const u2 signature_index = cfs->get_u2_fast();
2338 guarantee_property(
2339 valid_symbol_at(signature_index),
2340 "Illegal constant pool index %u for method signature in class file %s",
2341 signature_index, CHECK_NULL);
2342 const Symbol* const signature = cp->symbol_at(signature_index);
2343
2344 if (name == vmSymbols::class_initializer_name()) {
2345 // We ignore the other access flags for a valid class initializer.
2346 // (JVM Spec 2nd ed., chapter 4.6)
2347 if (_major_version < 51) { // backward compatibility
2348 flags = JVM_ACC_STATIC;
2349 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2350 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2351 } else {
2352 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2353 }
2354 } else {
2355 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2356 }
2357
2358 if (name == vmSymbols::object_initializer_name() && is_interface) {
2359 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2360 }
2361
2362 int args_size = -1; // only used when _need_verify is true
2363 if (_need_verify) {
2364 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2365 verify_legal_method_signature(name, signature, CHECK_NULL);
2366 if (args_size > MAX_ARGS_SIZE) {
2367 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2368 }
2369 }
2370
2371 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2372
2373 // Default values for code and exceptions attribute elements
2374 u2 max_stack = 0;
2375 u2 max_locals = 0;
2376 u4 code_length = 0;
2377 const u1* code_start = 0;
2378 u2 exception_table_length = 0;
2379 const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2380 Array<int>* exception_handlers = Universe::the_empty_int_array();
2381 u2 checked_exceptions_length = 0;
2382 const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2383 CompressedLineNumberWriteStream* linenumber_table = NULL;
2384 int linenumber_table_length = 0;
2385 int total_lvt_length = 0;
2386 u2 lvt_cnt = 0;
2387 u2 lvtt_cnt = 0;
2388 bool lvt_allocated = false;
2389 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2390 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2391 u2* localvariable_table_length = NULL;
2392 const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2393 u2* localvariable_type_table_length = NULL;
2394 const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2395 int method_parameters_length = -1;
2396 const u1* method_parameters_data = NULL;
2397 bool method_parameters_seen = false;
2398 bool parsed_code_attribute = false;
2399 bool parsed_checked_exceptions_attribute = false;
2400 bool parsed_stackmap_attribute = false;
2401 // stackmap attribute - JDK1.5
2402 const u1* stackmap_data = NULL;
2403 int stackmap_data_length = 0;
2404 u2 generic_signature_index = 0;
2405 MethodAnnotationCollector parsed_annotations;
2406 const u1* runtime_visible_annotations = NULL;
2407 int runtime_visible_annotations_length = 0;
2408 const u1* runtime_invisible_annotations = NULL;
2409 int runtime_invisible_annotations_length = 0;
2410 const u1* runtime_visible_parameter_annotations = NULL;
2411 int runtime_visible_parameter_annotations_length = 0;
2412 const u1* runtime_invisible_parameter_annotations = NULL;
2413 int runtime_invisible_parameter_annotations_length = 0;
2414 const u1* runtime_visible_type_annotations = NULL;
2415 int runtime_visible_type_annotations_length = 0;
2416 const u1* runtime_invisible_type_annotations = NULL;
2417 int runtime_invisible_type_annotations_length = 0;
2418 bool runtime_invisible_annotations_exists = false;
2419 bool runtime_invisible_type_annotations_exists = false;
2420 bool runtime_invisible_parameter_annotations_exists = false;
2421 const u1* annotation_default = NULL;
2422 int annotation_default_length = 0;
2423
2424 // Parse code and exceptions attribute
2425 u2 method_attributes_count = cfs->get_u2_fast();
2426 while (method_attributes_count--) {
2427 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2428 const u2 method_attribute_name_index = cfs->get_u2_fast();
2429 const u4 method_attribute_length = cfs->get_u4_fast();
2430 check_property(
2431 valid_symbol_at(method_attribute_name_index),
2432 "Invalid method attribute name index %u in class file %s",
2433 method_attribute_name_index, CHECK_NULL);
2434
2435 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2436 if (method_attribute_name == vmSymbols::tag_code()) {
2437 // Parse Code attribute
2438 if (_need_verify) {
2439 guarantee_property(
2440 !access_flags.is_native() && !access_flags.is_abstract(),
2441 "Code attribute in native or abstract methods in class file %s",
2442 CHECK_NULL);
2443 }
2444 if (parsed_code_attribute) {
2445 classfile_parse_error("Multiple Code attributes in class file %s",
2446 CHECK_NULL);
2447 }
2448 parsed_code_attribute = true;
2449
2450 // Stack size, locals size, and code size
2451 if (_major_version == 45 && _minor_version <= 2) {
2452 cfs->guarantee_more(4, CHECK_NULL);
2453 max_stack = cfs->get_u1_fast();
2454 max_locals = cfs->get_u1_fast();
2455 code_length = cfs->get_u2_fast();
2456 } else {
2457 cfs->guarantee_more(8, CHECK_NULL);
2458 max_stack = cfs->get_u2_fast();
2459 max_locals = cfs->get_u2_fast();
2460 code_length = cfs->get_u4_fast();
2461 }
2462 if (_need_verify) {
2463 guarantee_property(args_size <= max_locals,
2464 "Arguments can't fit into locals in class file %s",
2465 CHECK_NULL);
2466 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2467 "Invalid method Code length %u in class file %s",
2468 code_length, CHECK_NULL);
2469 }
2470 // Code pointer
2471 code_start = cfs->current();
2472 assert(code_start != NULL, "null code start");
2473 cfs->guarantee_more(code_length, CHECK_NULL);
2474 cfs->skip_u1_fast(code_length);
2475
2476 // Exception handler table
2477 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2478 exception_table_length = cfs->get_u2_fast();
2479 if (exception_table_length > 0) {
2480 exception_table_start = parse_exception_table(cfs,
2481 code_length,
2482 exception_table_length,
2483 CHECK_NULL);
2484 }
2485
2486 // Parse additional attributes in code attribute
2487 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2488 u2 code_attributes_count = cfs->get_u2_fast();
2489
2490 unsigned int calculated_attribute_length = 0;
2491
2492 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2493 calculated_attribute_length =
2494 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2495 } else {
2496 // max_stack, locals and length are smaller in pre-version 45.2 classes
2497 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2498 }
2499 calculated_attribute_length +=
2500 code_length +
2501 sizeof(exception_table_length) +
2502 sizeof(code_attributes_count) +
2503 exception_table_length *
2504 ( sizeof(u2) + // start_pc
2505 sizeof(u2) + // end_pc
2506 sizeof(u2) + // handler_pc
2507 sizeof(u2) ); // catch_type_index
2508
2509 while (code_attributes_count--) {
2510 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2511 const u2 code_attribute_name_index = cfs->get_u2_fast();
2512 const u4 code_attribute_length = cfs->get_u4_fast();
2513 calculated_attribute_length += code_attribute_length +
2514 sizeof(code_attribute_name_index) +
2515 sizeof(code_attribute_length);
2516 check_property(valid_symbol_at(code_attribute_name_index),
2517 "Invalid code attribute name index %u in class file %s",
2518 code_attribute_name_index,
2519 CHECK_NULL);
2520 if (LoadLineNumberTables &&
2521 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2522 // Parse and compress line number table
2523 parse_linenumber_table(code_attribute_length,
2524 code_length,
2525 &linenumber_table,
2526 CHECK_NULL);
2527
2528 } else if (LoadLocalVariableTables &&
2529 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2530 // Parse local variable table
2531 if (!lvt_allocated) {
2532 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2533 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2534 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2535 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2536 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2537 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2538 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2539 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2540 lvt_allocated = true;
2541 }
2542 if (lvt_cnt == max_lvt_cnt) {
2543 max_lvt_cnt <<= 1;
2544 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2545 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2546 }
2547 localvariable_table_start[lvt_cnt] =
2548 parse_localvariable_table(cfs,
2549 code_length,
2550 max_locals,
2551 code_attribute_length,
2552 &localvariable_table_length[lvt_cnt],
2553 false, // is not LVTT
2554 CHECK_NULL);
2555 total_lvt_length += localvariable_table_length[lvt_cnt];
2556 lvt_cnt++;
2557 } else if (LoadLocalVariableTypeTables &&
2558 _major_version >= JAVA_1_5_VERSION &&
2559 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2560 if (!lvt_allocated) {
2561 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2562 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2563 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2564 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2565 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2566 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2567 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2568 THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2569 lvt_allocated = true;
2570 }
2571 // Parse local variable type table
2572 if (lvtt_cnt == max_lvtt_cnt) {
2573 max_lvtt_cnt <<= 1;
2574 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2575 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2576 }
2577 localvariable_type_table_start[lvtt_cnt] =
2578 parse_localvariable_table(cfs,
2579 code_length,
2580 max_locals,
2581 code_attribute_length,
2582 &localvariable_type_table_length[lvtt_cnt],
2583 true, // is LVTT
2584 CHECK_NULL);
2585 lvtt_cnt++;
2586 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2587 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2588 // Stack map is only needed by the new verifier in JDK1.5.
2589 if (parsed_stackmap_attribute) {
2590 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2591 }
2592 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2593 stackmap_data_length = code_attribute_length;
2594 parsed_stackmap_attribute = true;
2595 } else {
2596 // Skip unknown attributes
2597 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2598 }
2599 }
2600 // check method attribute length
2601 if (_need_verify) {
2602 guarantee_property(method_attribute_length == calculated_attribute_length,
2603 "Code segment has wrong length in class file %s",
2604 CHECK_NULL);
2605 }
2606 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2607 // Parse Exceptions attribute
2608 if (parsed_checked_exceptions_attribute) {
2609 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2610 CHECK_NULL);
2611 }
2612 parsed_checked_exceptions_attribute = true;
2613 checked_exceptions_start =
2614 parse_checked_exceptions(cfs,
2615 &checked_exceptions_length,
2616 method_attribute_length,
2617 CHECK_NULL);
2618 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2619 // reject multiple method parameters
2620 if (method_parameters_seen) {
2621 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2622 CHECK_NULL);
2623 }
2624 method_parameters_seen = true;
2625 method_parameters_length = cfs->get_u1_fast();
2626 const u2 real_length = (method_parameters_length * 4u) + 1u;
2627 if (method_attribute_length != real_length) {
2628 classfile_parse_error(
2629 "Invalid MethodParameters method attribute length %u in class file",
2630 method_attribute_length, CHECK_NULL);
2631 }
2632 method_parameters_data = cfs->current();
2633 cfs->skip_u2_fast(method_parameters_length);
2634 cfs->skip_u2_fast(method_parameters_length);
2635 // ignore this attribute if it cannot be reflected
2636 if (!SystemDictionary::Parameter_klass_loaded())
2637 method_parameters_length = -1;
2638 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2639 if (method_attribute_length != 0) {
2640 classfile_parse_error(
2641 "Invalid Synthetic method attribute length %u in class file %s",
2642 method_attribute_length, CHECK_NULL);
2643 }
2644 // Should we check that there hasn't already been a synthetic attribute?
2645 access_flags.set_is_synthetic();
2646 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2647 if (method_attribute_length != 0) {
2648 classfile_parse_error(
2649 "Invalid Deprecated method attribute length %u in class file %s",
2650 method_attribute_length, CHECK_NULL);
2651 }
2652 } else if (_major_version >= JAVA_1_5_VERSION) {
2653 if (method_attribute_name == vmSymbols::tag_signature()) {
2654 if (generic_signature_index != 0) {
2655 classfile_parse_error(
2656 "Multiple Signature attributes for method in class file %s",
2657 CHECK_NULL);
2658 }
2659 if (method_attribute_length != 2) {
2660 classfile_parse_error(
2661 "Invalid Signature attribute length %u in class file %s",
2662 method_attribute_length, CHECK_NULL);
2663 }
2664 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2665 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2666 if (runtime_visible_annotations != NULL) {
2667 classfile_parse_error(
2668 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2669 CHECK_NULL);
2670 }
2671 runtime_visible_annotations_length = method_attribute_length;
2672 runtime_visible_annotations = cfs->current();
2673 assert(runtime_visible_annotations != NULL, "null visible annotations");
2674 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2675 parse_annotations(cp,
2676 runtime_visible_annotations,
2677 runtime_visible_annotations_length,
2678 &parsed_annotations,
2679 _loader_data,
2680 CHECK_NULL);
2681 cfs->skip_u1_fast(runtime_visible_annotations_length);
2682 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2683 if (runtime_invisible_annotations_exists) {
2684 classfile_parse_error(
2685 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2686 CHECK_NULL);
2687 }
2688 runtime_invisible_annotations_exists = true;
2689 if (PreserveAllAnnotations) {
2690 runtime_invisible_annotations_length = method_attribute_length;
2691 runtime_invisible_annotations = cfs->current();
2692 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2693 }
2694 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2695 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2696 if (runtime_visible_parameter_annotations != NULL) {
2697 classfile_parse_error(
2698 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2699 CHECK_NULL);
2700 }
2701 runtime_visible_parameter_annotations_length = method_attribute_length;
2702 runtime_visible_parameter_annotations = cfs->current();
2703 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2704 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2705 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2706 if (runtime_invisible_parameter_annotations_exists) {
2707 classfile_parse_error(
2708 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2709 CHECK_NULL);
2710 }
2711 runtime_invisible_parameter_annotations_exists = true;
2712 if (PreserveAllAnnotations) {
2713 runtime_invisible_parameter_annotations_length = method_attribute_length;
2714 runtime_invisible_parameter_annotations = cfs->current();
2715 assert(runtime_invisible_parameter_annotations != NULL,
2716 "null invisible parameter annotations");
2717 }
2718 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2719 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2720 if (annotation_default != NULL) {
2721 classfile_parse_error(
2722 "Multiple AnnotationDefault attributes for method in class file %s",
2723 CHECK_NULL);
2724 }
2725 annotation_default_length = method_attribute_length;
2726 annotation_default = cfs->current();
2727 assert(annotation_default != NULL, "null annotation default");
2728 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2729 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2730 if (runtime_visible_type_annotations != NULL) {
2731 classfile_parse_error(
2732 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2733 CHECK_NULL);
2734 }
2735 runtime_visible_type_annotations_length = method_attribute_length;
2736 runtime_visible_type_annotations = cfs->current();
2737 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2738 // No need for the VM to parse Type annotations
2739 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2740 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2741 if (runtime_invisible_type_annotations_exists) {
2742 classfile_parse_error(
2743 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2744 CHECK_NULL);
2745 } else {
2746 runtime_invisible_type_annotations_exists = true;
2747 }
2748 if (PreserveAllAnnotations) {
2749 runtime_invisible_type_annotations_length = method_attribute_length;
2750 runtime_invisible_type_annotations = cfs->current();
2751 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2752 }
2753 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2754 } else {
2755 // Skip unknown attributes
2756 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2757 }
2758 } else {
2759 // Skip unknown attributes
2760 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2761 }
2762 }
2763
2764 if (linenumber_table != NULL) {
2765 linenumber_table->write_terminator();
2766 linenumber_table_length = linenumber_table->position();
2767 }
2768
2769 // Make sure there's at least one Code attribute in non-native/non-abstract method
2770 if (_need_verify) {
2771 guarantee_property(access_flags.is_native() ||
2772 access_flags.is_abstract() ||
2773 parsed_code_attribute,
2774 "Absent Code attribute in method that is not native or abstract in class file %s",
2775 CHECK_NULL);
2776 }
2777
2778 // All sizing information for a Method* is finally available, now create it
2779 InlineTableSizes sizes(
2780 total_lvt_length,
2781 linenumber_table_length,
2782 exception_table_length,
2783 checked_exceptions_length,
2784 method_parameters_length,
2785 generic_signature_index,
2786 runtime_visible_annotations_length +
2787 runtime_invisible_annotations_length,
2788 runtime_visible_parameter_annotations_length +
2789 runtime_invisible_parameter_annotations_length,
2790 runtime_visible_type_annotations_length +
2791 runtime_invisible_type_annotations_length,
2792 annotation_default_length,
2793 0);
2794
2795 Method* const m = Method::allocate(_loader_data,
2796 code_length,
2797 access_flags,
2798 &sizes,
2799 ConstMethod::NORMAL,
2800 CHECK_NULL);
2801
2802 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2803
2804 // Fill in information from fixed part (access_flags already set)
2805 m->set_constants(_cp);
2806 m->set_name_index(name_index);
2807 m->set_signature_index(signature_index);
2808
2809 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2810 m->constMethod()->set_result_type(rtf.type());
2811
2812 if (args_size >= 0) {
2813 m->set_size_of_parameters(args_size);
2814 } else {
2815 m->compute_size_of_parameters(THREAD);
2816 }
2817 #ifdef ASSERT
2818 if (args_size >= 0) {
2819 m->compute_size_of_parameters(THREAD);
2820 assert(args_size == m->size_of_parameters(), "");
2821 }
2822 #endif
2823
2824 // Fill in code attribute information
2825 m->set_max_stack(max_stack);
2826 m->set_max_locals(max_locals);
2827 if (stackmap_data != NULL) {
2828 m->constMethod()->copy_stackmap_data(_loader_data,
2829 (u1*)stackmap_data,
2830 stackmap_data_length,
2831 CHECK_NULL);
2832 }
2833
2834 // Copy byte codes
2835 m->set_code((u1*)code_start);
2836
2837 // Copy line number table
2838 if (linenumber_table != NULL) {
2839 memcpy(m->compressed_linenumber_table(),
2840 linenumber_table->buffer(),
2841 linenumber_table_length);
2842 }
2843
2844 // Copy exception table
2845 if (exception_table_length > 0) {
2846 Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2847 m->exception_table_start(),
2848 exception_table_length * sizeof(ExceptionTableElement),
2849 sizeof(u2));
2850 }
2851
2852 // Copy method parameters
2853 if (method_parameters_length > 0) {
2854 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2855 for (int i = 0; i < method_parameters_length; i++) {
2856 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2857 method_parameters_data += 2;
2858 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2859 method_parameters_data += 2;
2860 }
2861 }
2862
2863 // Copy checked exceptions
2864 if (checked_exceptions_length > 0) {
2865 Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2866 m->checked_exceptions_start(),
2867 checked_exceptions_length * sizeof(CheckedExceptionElement),
2868 sizeof(u2));
2869 }
2870
2871 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2872 if (total_lvt_length > 0) {
2873 promoted_flags->set_has_localvariable_table();
2874 copy_localvariable_table(m->constMethod(),
2875 lvt_cnt,
2876 localvariable_table_length,
2877 localvariable_table_start,
2878 lvtt_cnt,
2879 localvariable_type_table_length,
2880 localvariable_type_table_start,
2881 CHECK_NULL);
2882 }
2883
2884 if (parsed_annotations.has_any_annotations())
2885 parsed_annotations.apply_to(m);
2886
2887 // Copy annotations
2888 copy_method_annotations(m->constMethod(),
2889 runtime_visible_annotations,
2890 runtime_visible_annotations_length,
2891 runtime_invisible_annotations,
2892 runtime_invisible_annotations_length,
2893 runtime_visible_parameter_annotations,
2894 runtime_visible_parameter_annotations_length,
2895 runtime_invisible_parameter_annotations,
2896 runtime_invisible_parameter_annotations_length,
2897 runtime_visible_type_annotations,
2898 runtime_visible_type_annotations_length,
2899 runtime_invisible_type_annotations,
2900 runtime_invisible_type_annotations_length,
2901 annotation_default,
2902 annotation_default_length,
2903 CHECK_NULL);
2904
2905 if (name == vmSymbols::finalize_method_name() &&
2906 signature == vmSymbols::void_method_signature()) {
2907 if (m->is_empty_method()) {
2908 _has_empty_finalizer = true;
2909 } else {
2910 _has_finalizer = true;
2911 }
2912 }
2913 if (name == vmSymbols::object_initializer_name() &&
2914 signature == vmSymbols::void_method_signature() &&
2915 m->is_vanilla_constructor()) {
2916 _has_vanilla_constructor = true;
2917 }
2918
2919 NOT_PRODUCT(m->verify());
2920 return m;
2921 }
2922
2923
2924 // The promoted_flags parameter is used to pass relevant access_flags
2925 // from the methods back up to the containing klass. These flag values
2926 // are added to klass's access_flags.
2927 // Side-effects: populates the _methods field in the parser
2928 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2929 bool is_interface,
2930 AccessFlags* promoted_flags,
2931 bool* has_final_method,
2932 bool* declares_nonstatic_concrete_methods,
2933 TRAPS) {
2934 assert(cfs != NULL, "invariant");
2935 assert(promoted_flags != NULL, "invariant");
2936 assert(has_final_method != NULL, "invariant");
2937 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2938
2939 assert(NULL == _methods, "invariant");
2940
2941 cfs->guarantee_more(2, CHECK); // length
2942 const u2 length = cfs->get_u2_fast();
2943 if (length == 0) {
2944 _methods = Universe::the_empty_method_array();
2945 } else {
2946 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2947 length,
2948 NULL,
2949 CHECK);
2950
2951 for (int index = 0; index < length; index++) {
2952 Method* method = parse_method(cfs,
2953 is_interface,
2954 _cp,
2955 promoted_flags,
2956 CHECK);
2957
2958 if (method->is_final()) {
2959 *has_final_method = true;
2960 }
2961 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2962 // used for interface initialization, and default method inheritance analysis
2963 if (is_interface && !(*declares_nonstatic_concrete_methods)
2964 && !method->is_abstract() && !method->is_static()) {
2965 *declares_nonstatic_concrete_methods = true;
2966 }
2967 _methods->at_put(index, method);
2968 }
2969
2970 if (_need_verify && length > 1) {
2971 // Check duplicated methods
2972 ResourceMark rm(THREAD);
2973 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2974 THREAD, NameSigHash*, HASH_ROW_SIZE);
2975 initialize_hashtable(names_and_sigs);
2976 bool dup = false;
2977 const Symbol* name = NULL;
2978 const Symbol* sig = NULL;
2979 {
2980 debug_only(NoSafepointVerifier nsv;)
2981 for (int i = 0; i < length; i++) {
2982 const Method* const m = _methods->at(i);
2983 name = m->name();
2984 sig = m->signature();
2985 // If no duplicates, add name/signature in hashtable names_and_sigs.
2986 if (!put_after_lookup(name, sig, names_and_sigs)) {
2987 dup = true;
2988 break;
2989 }
2990 }
2991 }
2992 if (dup) {
2993 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2994 name->as_C_string(), sig->as_klass_external_name(), CHECK);
2995 }
2996 }
2997 }
2998 }
2999
3000 static const intArray* sort_methods(Array<Method*>* methods) {
3001 const int length = methods->length();
3002 // If JVMTI original method ordering or sharing is enabled we have to
3003 // remember the original class file ordering.
3004 // We temporarily use the vtable_index field in the Method* to store the
3005 // class file index, so we can read in after calling qsort.
3006 // Put the method ordering in the shared archive.
3007 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3008 for (int index = 0; index < length; index++) {
3009 Method* const m = methods->at(index);
3010 assert(!m->valid_vtable_index(), "vtable index should not be set");
3011 m->set_vtable_index(index);
3012 }
3013 }
3014 // Sort method array by ascending method name (for faster lookups & vtable construction)
3015 // Note that the ordering is not alphabetical, see Symbol::fast_compare
3016 Method::sort_methods(methods);
3017
3018 intArray* method_ordering = NULL;
3019 // If JVMTI original method ordering or sharing is enabled construct int
3020 // array remembering the original ordering
3021 if (JvmtiExport::can_maintain_original_method_order() || Arguments::is_dumping_archive()) {
3022 method_ordering = new intArray(length, length, -1);
3023 for (int index = 0; index < length; index++) {
3024 Method* const m = methods->at(index);
3025 const int old_index = m->vtable_index();
3026 assert(old_index >= 0 && old_index < length, "invalid method index");
3027 method_ordering->at_put(index, old_index);
3028 m->set_vtable_index(Method::invalid_vtable_index);
3029 }
3030 }
3031 return method_ordering;
3032 }
3033
3034 // Parse generic_signature attribute for methods and fields
3035 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3036 TRAPS) {
3037 assert(cfs != NULL, "invariant");
3038
3039 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
3040 const u2 generic_signature_index = cfs->get_u2_fast();
3041 check_property(
3042 valid_symbol_at(generic_signature_index),
3043 "Invalid Signature attribute at constant pool index %u in class file %s",
3044 generic_signature_index, CHECK_0);
3045 return generic_signature_index;
3046 }
3047
3048 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3049 TRAPS) {
3050
3051 assert(cfs != NULL, "invariant");
3052
3053 cfs->guarantee_more(2, CHECK); // sourcefile_index
3054 const u2 sourcefile_index = cfs->get_u2_fast();
3055 check_property(
3056 valid_symbol_at(sourcefile_index),
3057 "Invalid SourceFile attribute at constant pool index %u in class file %s",
3058 sourcefile_index, CHECK);
3059 set_class_sourcefile_index(sourcefile_index);
3060 }
3061
3062 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3063 int length,
3064 TRAPS) {
3065 assert(cfs != NULL, "invariant");
3066
3067 const u1* const sde_buffer = cfs->current();
3068 assert(sde_buffer != NULL, "null sde buffer");
3069
3070 // Don't bother storing it if there is no way to retrieve it
3071 if (JvmtiExport::can_get_source_debug_extension()) {
3072 assert((length+1) > length, "Overflow checking");
3073 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3074 for (int i = 0; i < length; i++) {
3075 sde[i] = sde_buffer[i];
3076 }
3077 sde[length] = '\0';
3078 set_class_sde_buffer((const char*)sde, length);
3079 }
3080 // Got utf8 string, set stream position forward
3081 cfs->skip_u1(length, CHECK);
3082 }
3083
3084
3085 // Inner classes can be static, private or protected (classic VM does this)
3086 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3087 JVM_ACC_PRIVATE | \
3088 JVM_ACC_PROTECTED | \
3089 JVM_ACC_STATIC \
3090 )
3091
3092 // Return number of classes in the inner classes attribute table
3093 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3094 const u1* const inner_classes_attribute_start,
3095 bool parsed_enclosingmethod_attribute,
3096 u2 enclosing_method_class_index,
3097 u2 enclosing_method_method_index,
3098 TRAPS) {
3099 const u1* const current_mark = cfs->current();
3100 u2 length = 0;
3101 if (inner_classes_attribute_start != NULL) {
3102 cfs->set_current(inner_classes_attribute_start);
3103 cfs->guarantee_more(2, CHECK_0); // length
3104 length = cfs->get_u2_fast();
3105 }
3106
3107 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3108 // method data:
3109 // [inner_class_info_index,
3110 // outer_class_info_index,
3111 // inner_name_index,
3112 // inner_class_access_flags,
3113 // ...
3114 // enclosing_method_class_index,
3115 // enclosing_method_method_index]
3116 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3117 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3118 _inner_classes = inner_classes;
3119
3120 int index = 0;
3121 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3122 for (int n = 0; n < length; n++) {
3123 // Inner class index
3124 const u2 inner_class_info_index = cfs->get_u2_fast();
3125 check_property(
3126 valid_klass_reference_at(inner_class_info_index),
3127 "inner_class_info_index %u has bad constant type in class file %s",
3128 inner_class_info_index, CHECK_0);
3129 // Outer class index
3130 const u2 outer_class_info_index = cfs->get_u2_fast();
3131 check_property(
3132 outer_class_info_index == 0 ||
3133 valid_klass_reference_at(outer_class_info_index),
3134 "outer_class_info_index %u has bad constant type in class file %s",
3135 outer_class_info_index, CHECK_0);
3136 // Inner class name
3137 const u2 inner_name_index = cfs->get_u2_fast();
3138 check_property(
3139 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3140 "inner_name_index %u has bad constant type in class file %s",
3141 inner_name_index, CHECK_0);
3142 if (_need_verify) {
3143 guarantee_property(inner_class_info_index != outer_class_info_index,
3144 "Class is both outer and inner class in class file %s", CHECK_0);
3145 }
3146 // Access flags
3147 jint flags;
3148 // JVM_ACC_MODULE is defined in JDK-9 and later.
3149 if (_major_version >= JAVA_9_VERSION) {
3150 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3151 } else {
3152 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3153 }
3154 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3155 // Set abstract bit for old class files for backward compatibility
3156 flags |= JVM_ACC_ABSTRACT;
3157 }
3158 verify_legal_class_modifiers(flags, CHECK_0);
3159 AccessFlags inner_access_flags(flags);
3160
3161 inner_classes->at_put(index++, inner_class_info_index);
3162 inner_classes->at_put(index++, outer_class_info_index);
3163 inner_classes->at_put(index++, inner_name_index);
3164 inner_classes->at_put(index++, inner_access_flags.as_short());
3165 }
3166
3167 // 4347400: make sure there's no duplicate entry in the classes array
3168 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3169 for(int i = 0; i < length * 4; i += 4) {
3170 for(int j = i + 4; j < length * 4; j += 4) {
3171 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3172 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3173 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3174 inner_classes->at(i+3) != inner_classes->at(j+3)),
3175 "Duplicate entry in InnerClasses in class file %s",
3176 CHECK_0);
3177 }
3178 }
3179 }
3180
3181 // Set EnclosingMethod class and method indexes.
3182 if (parsed_enclosingmethod_attribute) {
3183 inner_classes->at_put(index++, enclosing_method_class_index);
3184 inner_classes->at_put(index++, enclosing_method_method_index);
3185 }
3186 assert(index == size, "wrong size");
3187
3188 // Restore buffer's current position.
3189 cfs->set_current(current_mark);
3190
3191 return length;
3192 }
3193
3194 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3195 const u1* const nest_members_attribute_start,
3196 TRAPS) {
3197 const u1* const current_mark = cfs->current();
3198 u2 length = 0;
3199 if (nest_members_attribute_start != NULL) {
3200 cfs->set_current(nest_members_attribute_start);
3201 cfs->guarantee_more(2, CHECK_0); // length
3202 length = cfs->get_u2_fast();
3203 }
3204 const int size = length;
3205 Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3206 _nest_members = nest_members;
3207
3208 int index = 0;
3209 cfs->guarantee_more(2 * length, CHECK_0);
3210 for (int n = 0; n < length; n++) {
3211 const u2 class_info_index = cfs->get_u2_fast();
3212 check_property(
3213 valid_klass_reference_at(class_info_index),
3214 "Nest member class_info_index %u has bad constant type in class file %s",
3215 class_info_index, CHECK_0);
3216 nest_members->at_put(index++, class_info_index);
3217 }
3218 assert(index == size, "wrong size");
3219
3220 // Restore buffer's current position.
3221 cfs->set_current(current_mark);
3222
3223 return length;
3224 }
3225
3226 // Record {
3227 // u2 attribute_name_index;
3228 // u4 attribute_length;
3229 // u2 components_count;
3230 // component_info components[components_count];
3231 // }
3232 // component_info {
3233 // u2 name_index;
3234 // u2 descriptor_index
3235 // u2 attributs_count;
3236 // attribute_info_attributes[attributes_count];
3237 // }
3238 u2 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3239 const ConstantPool* cp,
3240 const u1* const record_attribute_start,
3241 TRAPS) {
3242 const u1* const current_mark = cfs->current();
3243 int components_count = 0;
3244 unsigned int calculate_attr_size = 0;
3245 if (record_attribute_start != NULL) {
3246 cfs->set_current(record_attribute_start);
3247 cfs->guarantee_more(2, CHECK_0); // num of components
3248 components_count = (int)cfs->get_u2_fast();
3249 calculate_attr_size = 2;
3250 }
3251
3252 Array<RecordComponent*>* const record_components =
3253 MetadataFactory::new_array<RecordComponent*>(_loader_data, components_count, NULL, CHECK_0);
3254 _record_components = record_components;
3255
3256 for (int x = 0; x < components_count; x++) {
3257 cfs->guarantee_more(6, CHECK_0); // name_index, descriptor_index, attributes_count
3258
3259 const u2 name_index = cfs->get_u2_fast();
3260 check_property(valid_symbol_at(name_index),
3261 "Invalid constant pool index %u for name in Record attribute in class file %s",
3262 name_index, CHECK_0);
3263 const Symbol* const name = cp->symbol_at(name_index);
3264 verify_legal_field_name(name, CHECK_0);
3265
3266 const u2 descriptor_index = cfs->get_u2_fast();
3267 check_property(valid_symbol_at(descriptor_index),
3268 "Invalid constant pool index %u for descriptor in Record attribute in class file %s",
3269 descriptor_index, CHECK_0);
3270 const Symbol* const descr = cp->symbol_at(descriptor_index);
3271 verify_legal_field_signature(name, descr, CHECK_0);
3272
3273 const u2 attributes_count = cfs->get_u2_fast();
3274 calculate_attr_size += 6;
3275 u2 generic_sig_index = 0;
3276 const u1* runtime_visible_annotations = NULL;
3277 int runtime_visible_annotations_length = 0;
3278 const u1* runtime_invisible_annotations = NULL;
3279 int runtime_invisible_annotations_length = 0;
3280 bool runtime_invisible_annotations_exists = false;
3281 const u1* runtime_visible_type_annotations = NULL;
3282 int runtime_visible_type_annotations_length = 0;
3283 const u1* runtime_invisible_type_annotations = NULL;
3284 int runtime_invisible_type_annotations_length = 0;
3285 bool runtime_invisible_type_annotations_exists = false;
3286
3287 // Expected attributes for record components are Signature, Runtime(In)VisibleAnnotations,
3288 // and Runtime(In)VisibleTypeAnnotations. Other attributes are ignored.
3289 for (int y = 0; y < attributes_count; y++) {
3290 cfs->guarantee_more(6, CHECK_0); // attribute_name_index, attribute_length
3291 const u2 attribute_name_index = cfs->get_u2_fast();
3292 const u4 attribute_length = cfs->get_u4_fast();
3293 calculate_attr_size += 6;
3294 check_property(
3295 valid_symbol_at(attribute_name_index),
3296 "Invalid Record attribute name index %u in class file %s",
3297 attribute_name_index, CHECK_0);
3298
3299 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
3300 if (attribute_name == vmSymbols::tag_signature()) {
3301 if (generic_sig_index != 0) {
3302 classfile_parse_error(
3303 "Multiple Signature attributes for Record component in class file %s",
3304 CHECK_0);
3305 }
3306 if (attribute_length != 2) {
3307 classfile_parse_error(
3308 "Invalid Signature attribute length %u in Record component in class file %s",
3309 attribute_length, CHECK_0);
3310 }
3311 generic_sig_index = parse_generic_signature_attribute(cfs, CHECK_0);
3312
3313 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
3314 if (runtime_visible_annotations != NULL) {
3315 classfile_parse_error(
3316 "Multiple RuntimeVisibleAnnotations attributes for Record component in class file %s", CHECK_0);
3317 }
3318 runtime_visible_annotations_length = attribute_length;
3319 runtime_visible_annotations = cfs->current();
3320
3321 assert(runtime_visible_annotations != NULL, "null record component visible annotation");
3322 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_0);
3323 cfs->skip_u1_fast(runtime_visible_annotations_length);
3324
3325 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
3326 if (runtime_invisible_annotations_exists) {
3327 classfile_parse_error(
3328 "Multiple RuntimeInvisibleAnnotations attributes for Record component in class file %s", CHECK_0);
3329 }
3330 runtime_invisible_annotations_exists = true;
3331 if (PreserveAllAnnotations) {
3332 runtime_invisible_annotations_length = attribute_length;
3333 runtime_invisible_annotations = cfs->current();
3334 assert(runtime_invisible_annotations != NULL, "null record component invisible annotation");
3335 }
3336 cfs->skip_u1(attribute_length, CHECK_0);
3337
3338 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
3339 if (runtime_visible_type_annotations != NULL) {
3340 classfile_parse_error(
3341 "Multiple RuntimeVisibleTypeAnnotations attributes for Record component in class file %s", CHECK_0);
3342 }
3343 runtime_visible_type_annotations_length = attribute_length;
3344 runtime_visible_type_annotations = cfs->current();
3345
3346 assert(runtime_visible_type_annotations != NULL, "null record component visible type annotation");
3347 cfs->guarantee_more(runtime_visible_type_annotations_length, CHECK_0);
3348 cfs->skip_u1_fast(runtime_visible_type_annotations_length);
3349
3350 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
3351 if (runtime_invisible_type_annotations_exists) {
3352 classfile_parse_error(
3353 "Multiple RuntimeInvisibleTypeAnnotations attributes for Record component in class file %s", CHECK_0);
3354 }
3355 runtime_invisible_type_annotations_exists = true;
3356 if (PreserveAllAnnotations) {
3357 runtime_invisible_type_annotations_length = attribute_length;
3358 runtime_invisible_type_annotations = cfs->current();
3359 assert(runtime_invisible_type_annotations != NULL, "null record component invisible type annotation");
3360 }
3361 cfs->skip_u1(attribute_length, CHECK_0);
3362
3363 } else {
3364 // Skip unknown attributes
3365 cfs->skip_u1(attribute_length, CHECK_0);
3366 }
3367 calculate_attr_size += attribute_length;
3368 } // End of attributes For loop
3369
3370 AnnotationArray* annotations = assemble_annotations(runtime_visible_annotations,
3371 runtime_visible_annotations_length,
3372 runtime_invisible_annotations,
3373 runtime_invisible_annotations_length,
3374 CHECK_0);
3375 AnnotationArray* type_annotations = assemble_annotations(runtime_visible_type_annotations,
3376 runtime_visible_type_annotations_length,
3377 runtime_invisible_type_annotations,
3378 runtime_invisible_type_annotations_length,
3379 CHECK_0);
3380
3381 RecordComponent* record_component =
3382 RecordComponent::allocate(_loader_data, name_index, descriptor_index,
3383 attributes_count, generic_sig_index,
3384 annotations, type_annotations, CHECK_0);
3385 record_components->at_put(x, record_component);
3386 } // End of component processing loop
3387
3388 // Restore buffer's current position.
3389 cfs->set_current(current_mark);
3390 return calculate_attr_size;
3391 }
3392
3393 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3394 set_class_synthetic_flag(true);
3395 }
3396
3397 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3398 assert(cfs != NULL, "invariant");
3399
3400 const u2 signature_index = cfs->get_u2(CHECK);
3401 check_property(
3402 valid_symbol_at(signature_index),
3403 "Invalid constant pool index %u in Signature attribute in class file %s",
3404 signature_index, CHECK);
3405 set_class_generic_signature_index(signature_index);
3406 }
3407
3408 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3409 ConstantPool* cp,
3410 u4 attribute_byte_length,
3411 TRAPS) {
3412 assert(cfs != NULL, "invariant");
3413 assert(cp != NULL, "invariant");
3414
3415 const u1* const current_start = cfs->current();
3416
3417 guarantee_property(attribute_byte_length >= sizeof(u2),
3418 "Invalid BootstrapMethods attribute length %u in class file %s",
3419 attribute_byte_length,
3420 CHECK);
3421
3422 cfs->guarantee_more(attribute_byte_length, CHECK);
3423
3424 const int attribute_array_length = cfs->get_u2_fast();
3425
3426 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3427 "Short length on BootstrapMethods in class file %s",
3428 CHECK);
3429
3430
3431 // The attribute contains a counted array of counted tuples of shorts,
3432 // represending bootstrap specifiers:
3433 // length*{bootstrap_method_index, argument_count*{argument_index}}
3434 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3435 // operand_count = number of shorts in attr, except for leading length
3436
3437 // The attribute is copied into a short[] array.
3438 // The array begins with a series of short[2] pairs, one for each tuple.
3439 const int index_size = (attribute_array_length * 2);
3440
3441 Array<u2>* const operands =
3442 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3443
3444 // Eagerly assign operands so they will be deallocated with the constant
3445 // pool if there is an error.
3446 cp->set_operands(operands);
3447
3448 int operand_fill_index = index_size;
3449 const int cp_size = cp->length();
3450
3451 for (int n = 0; n < attribute_array_length; n++) {
3452 // Store a 32-bit offset into the header of the operand array.
3453 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3454
3455 // Read a bootstrap specifier.
3456 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3457 const u2 bootstrap_method_index = cfs->get_u2_fast();
3458 const u2 argument_count = cfs->get_u2_fast();
3459 check_property(
3460 valid_cp_range(bootstrap_method_index, cp_size) &&
3461 cp->tag_at(bootstrap_method_index).is_method_handle(),
3462 "bootstrap_method_index %u has bad constant type in class file %s",
3463 bootstrap_method_index,
3464 CHECK);
3465
3466 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3467 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3468 CHECK);
3469
3470 operands->at_put(operand_fill_index++, bootstrap_method_index);
3471 operands->at_put(operand_fill_index++, argument_count);
3472
3473 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3474 for (int j = 0; j < argument_count; j++) {
3475 const u2 argument_index = cfs->get_u2_fast();
3476 check_property(
3477 valid_cp_range(argument_index, cp_size) &&
3478 cp->tag_at(argument_index).is_loadable_constant(),
3479 "argument_index %u has bad constant type in class file %s",
3480 argument_index,
3481 CHECK);
3482 operands->at_put(operand_fill_index++, argument_index);
3483 }
3484 }
3485 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3486 "Bad length on BootstrapMethods in class file %s",
3487 CHECK);
3488 }
3489
3490 bool ClassFileParser::supports_records() {
3491 return _major_version == JAVA_14_VERSION &&
3492 _minor_version == JAVA_PREVIEW_MINOR_VERSION &&
3493 Arguments::enable_preview();
3494 }
3495
3496 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3497 ConstantPool* cp,
3498 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3499 TRAPS) {
3500 assert(cfs != NULL, "invariant");
3501 assert(cp != NULL, "invariant");
3502 assert(parsed_annotations != NULL, "invariant");
3503
3504 // Set inner classes attribute to default sentinel
3505 _inner_classes = Universe::the_empty_short_array();
3506 // Set nest members attribute to default sentinel
3507 _nest_members = Universe::the_empty_short_array();
3508 cfs->guarantee_more(2, CHECK); // attributes_count
3509 u2 attributes_count = cfs->get_u2_fast();
3510 bool parsed_sourcefile_attribute = false;
3511 bool parsed_innerclasses_attribute = false;
3512 bool parsed_nest_members_attribute = false;
3513 bool parsed_nest_host_attribute = false;
3514 bool parsed_record_attribute = false;
3515 bool parsed_enclosingmethod_attribute = false;
3516 bool parsed_bootstrap_methods_attribute = false;
3517 const u1* runtime_visible_annotations = NULL;
3518 int runtime_visible_annotations_length = 0;
3519 const u1* runtime_invisible_annotations = NULL;
3520 int runtime_invisible_annotations_length = 0;
3521 const u1* runtime_visible_type_annotations = NULL;
3522 int runtime_visible_type_annotations_length = 0;
3523 const u1* runtime_invisible_type_annotations = NULL;
3524 int runtime_invisible_type_annotations_length = 0;
3525 bool runtime_invisible_type_annotations_exists = false;
3526 bool runtime_invisible_annotations_exists = false;
3527 bool parsed_source_debug_ext_annotations_exist = false;
3528 const u1* inner_classes_attribute_start = NULL;
3529 u4 inner_classes_attribute_length = 0;
3530 u2 enclosing_method_class_index = 0;
3531 u2 enclosing_method_method_index = 0;
3532 const u1* nest_members_attribute_start = NULL;
3533 u4 nest_members_attribute_length = 0;
3534 const u1* record_attribute_start = NULL;
3535 u4 record_attribute_length = 0;
3536
3537 // Iterate over attributes
3538 while (attributes_count--) {
3539 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3540 const u2 attribute_name_index = cfs->get_u2_fast();
3541 const u4 attribute_length = cfs->get_u4_fast();
3542 check_property(
3543 valid_symbol_at(attribute_name_index),
3544 "Attribute name has bad constant pool index %u in class file %s",
3545 attribute_name_index, CHECK);
3546 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3547 if (tag == vmSymbols::tag_source_file()) {
3548 // Check for SourceFile tag
3549 if (_need_verify) {
3550 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3551 }
3552 if (parsed_sourcefile_attribute) {
3553 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3554 } else {
3555 parsed_sourcefile_attribute = true;
3556 }
3557 parse_classfile_sourcefile_attribute(cfs, CHECK);
3558 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3559 // Check for SourceDebugExtension tag
3560 if (parsed_source_debug_ext_annotations_exist) {
3561 classfile_parse_error(
3562 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3563 }
3564 parsed_source_debug_ext_annotations_exist = true;
3565 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3566 } else if (tag == vmSymbols::tag_inner_classes()) {
3567 // Check for InnerClasses tag
3568 if (parsed_innerclasses_attribute) {
3569 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3570 } else {
3571 parsed_innerclasses_attribute = true;
3572 }
3573 inner_classes_attribute_start = cfs->current();
3574 inner_classes_attribute_length = attribute_length;
3575 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3576 } else if (tag == vmSymbols::tag_synthetic()) {
3577 // Check for Synthetic tag
3578 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3579 if (attribute_length != 0) {
3580 classfile_parse_error(
3581 "Invalid Synthetic classfile attribute length %u in class file %s",
3582 attribute_length, CHECK);
3583 }
3584 parse_classfile_synthetic_attribute(CHECK);
3585 } else if (tag == vmSymbols::tag_deprecated()) {
3586 // Check for Deprecatd tag - 4276120
3587 if (attribute_length != 0) {
3588 classfile_parse_error(
3589 "Invalid Deprecated classfile attribute length %u in class file %s",
3590 attribute_length, CHECK);
3591 }
3592 } else if (_major_version >= JAVA_1_5_VERSION) {
3593 if (tag == vmSymbols::tag_signature()) {
3594 if (_generic_signature_index != 0) {
3595 classfile_parse_error(
3596 "Multiple Signature attributes in class file %s", CHECK);
3597 }
3598 if (attribute_length != 2) {
3599 classfile_parse_error(
3600 "Wrong Signature attribute length %u in class file %s",
3601 attribute_length, CHECK);
3602 }
3603 parse_classfile_signature_attribute(cfs, CHECK);
3604 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3605 if (runtime_visible_annotations != NULL) {
3606 classfile_parse_error(
3607 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3608 }
3609 runtime_visible_annotations_length = attribute_length;
3610 runtime_visible_annotations = cfs->current();
3611 assert(runtime_visible_annotations != NULL, "null visible annotations");
3612 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3613 parse_annotations(cp,
3614 runtime_visible_annotations,
3615 runtime_visible_annotations_length,
3616 parsed_annotations,
3617 _loader_data,
3618 CHECK);
3619 cfs->skip_u1_fast(runtime_visible_annotations_length);
3620 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3621 if (runtime_invisible_annotations_exists) {
3622 classfile_parse_error(
3623 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3624 }
3625 runtime_invisible_annotations_exists = true;
3626 if (PreserveAllAnnotations) {
3627 runtime_invisible_annotations_length = attribute_length;
3628 runtime_invisible_annotations = cfs->current();
3629 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3630 }
3631 cfs->skip_u1(attribute_length, CHECK);
3632 } else if (tag == vmSymbols::tag_enclosing_method()) {
3633 if (parsed_enclosingmethod_attribute) {
3634 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3635 } else {
3636 parsed_enclosingmethod_attribute = true;
3637 }
3638 guarantee_property(attribute_length == 4,
3639 "Wrong EnclosingMethod attribute length %u in class file %s",
3640 attribute_length, CHECK);
3641 cfs->guarantee_more(4, CHECK); // class_index, method_index
3642 enclosing_method_class_index = cfs->get_u2_fast();
3643 enclosing_method_method_index = cfs->get_u2_fast();
3644 if (enclosing_method_class_index == 0) {
3645 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3646 }
3647 // Validate the constant pool indices and types
3648 check_property(valid_klass_reference_at(enclosing_method_class_index),
3649 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3650 if (enclosing_method_method_index != 0 &&
3651 (!cp->is_within_bounds(enclosing_method_method_index) ||
3652 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3653 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3654 }
3655 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3656 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3657 if (parsed_bootstrap_methods_attribute) {
3658 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3659 }
3660 parsed_bootstrap_methods_attribute = true;
3661 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3662 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3663 if (runtime_visible_type_annotations != NULL) {
3664 classfile_parse_error(
3665 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3666 }
3667 runtime_visible_type_annotations_length = attribute_length;
3668 runtime_visible_type_annotations = cfs->current();
3669 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3670 // No need for the VM to parse Type annotations
3671 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3672 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3673 if (runtime_invisible_type_annotations_exists) {
3674 classfile_parse_error(
3675 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3676 } else {
3677 runtime_invisible_type_annotations_exists = true;
3678 }
3679 if (PreserveAllAnnotations) {
3680 runtime_invisible_type_annotations_length = attribute_length;
3681 runtime_invisible_type_annotations = cfs->current();
3682 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3683 }
3684 cfs->skip_u1(attribute_length, CHECK);
3685 } else if (_major_version >= JAVA_11_VERSION) {
3686 if (tag == vmSymbols::tag_nest_members()) {
3687 // Check for NestMembers tag
3688 if (parsed_nest_members_attribute) {
3689 classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3690 } else {
3691 parsed_nest_members_attribute = true;
3692 }
3693 if (parsed_nest_host_attribute) {
3694 classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3695 }
3696 nest_members_attribute_start = cfs->current();
3697 nest_members_attribute_length = attribute_length;
3698 cfs->skip_u1(nest_members_attribute_length, CHECK);
3699 } else if (tag == vmSymbols::tag_nest_host()) {
3700 if (parsed_nest_host_attribute) {
3701 classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3702 } else {
3703 parsed_nest_host_attribute = true;
3704 }
3705 if (parsed_nest_members_attribute) {
3706 classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3707 }
3708 if (_need_verify) {
3709 guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3710 }
3711 cfs->guarantee_more(2, CHECK);
3712 u2 class_info_index = cfs->get_u2_fast();
3713 check_property(
3714 valid_klass_reference_at(class_info_index),
3715 "Nest-host class_info_index %u has bad constant type in class file %s",
3716 class_info_index, CHECK);
3717 _nest_host = class_info_index;
3718 } else if (tag == vmSymbols::tag_record()) {
3719 // Skip over Record attribute if not supported or if super class is
3720 // not java.lang.Record.
3721 if (supports_records() &&
3722 cp->klass_name_at(_super_class_index) == vmSymbols::java_lang_Record()) {
3723 if (parsed_record_attribute) {
3724 classfile_parse_error("Multiple Record attributes in class file %s", CHECK);
3725 }
3726 // Check that class is final and not abstract.
3727 if (!_access_flags.is_final() || _access_flags.is_abstract()) {
3728 classfile_parse_error("Record attribute in non-final or abstract class file %s", CHECK);
3729 }
3730 parsed_record_attribute = true;
3731 record_attribute_start = cfs->current();
3732 record_attribute_length = attribute_length;
3733 }
3734 cfs->skip_u1(attribute_length, CHECK);
3735 } else {
3736 // Unknown attribute
3737 cfs->skip_u1(attribute_length, CHECK);
3738 }
3739 } else {
3740 // Unknown attribute
3741 cfs->skip_u1(attribute_length, CHECK);
3742 }
3743 } else {
3744 // Unknown attribute
3745 cfs->skip_u1(attribute_length, CHECK);
3746 }
3747 }
3748 _class_annotations = assemble_annotations(runtime_visible_annotations,
3749 runtime_visible_annotations_length,
3750 runtime_invisible_annotations,
3751 runtime_invisible_annotations_length,
3752 CHECK);
3753 _class_type_annotations = assemble_annotations(runtime_visible_type_annotations,
3754 runtime_visible_type_annotations_length,
3755 runtime_invisible_type_annotations,
3756 runtime_invisible_type_annotations_length,
3757 CHECK);
3758
3759 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3760 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3761 cfs,
3762 inner_classes_attribute_start,
3763 parsed_innerclasses_attribute,
3764 enclosing_method_class_index,
3765 enclosing_method_method_index,
3766 CHECK);
3767 if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3768 guarantee_property(
3769 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3770 "Wrong InnerClasses attribute length in class file %s", CHECK);
3771 }
3772 }
3773
3774 if (parsed_nest_members_attribute) {
3775 const u2 num_of_classes = parse_classfile_nest_members_attribute(
3776 cfs,
3777 nest_members_attribute_start,
3778 CHECK);
3779 if (_need_verify) {
3780 guarantee_property(
3781 nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3782 "Wrong NestMembers attribute length in class file %s", CHECK);
3783 }
3784 }
3785
3786 if (parsed_record_attribute) {
3787 const unsigned int calculated_attr_length = parse_classfile_record_attribute(
3788 cfs,
3789 cp,
3790 record_attribute_start,
3791 CHECK);
3792 if (_need_verify) {
3793 guarantee_property(record_attribute_length == calculated_attr_length,
3794 "Record attribute has wrong length in class file %s",
3795 CHECK);
3796 }
3797 }
3798
3799 if (_max_bootstrap_specifier_index >= 0) {
3800 guarantee_property(parsed_bootstrap_methods_attribute,
3801 "Missing BootstrapMethods attribute in class file %s", CHECK);
3802 }
3803 }
3804
3805 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3806 assert(k != NULL, "invariant");
3807
3808 if (_synthetic_flag)
3809 k->set_is_synthetic();
3810 if (_sourcefile_index != 0) {
3811 k->set_source_file_name_index(_sourcefile_index);
3812 }
3813 if (_generic_signature_index != 0) {
3814 k->set_generic_signature_index(_generic_signature_index);
3815 }
3816 if (_sde_buffer != NULL) {
3817 k->set_source_debug_extension(_sde_buffer, _sde_length);
3818 }
3819 }
3820
3821 // Create the Annotations object that will
3822 // hold the annotations array for the Klass.
3823 void ClassFileParser::create_combined_annotations(TRAPS) {
3824 if (_class_annotations == NULL &&
3825 _class_type_annotations == NULL &&
3826 _fields_annotations == NULL &&
3827 _fields_type_annotations == NULL) {
3828 // Don't create the Annotations object unnecessarily.
3829 return;
3830 }
3831
3832 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3833 annotations->set_class_annotations(_class_annotations);
3834 annotations->set_class_type_annotations(_class_type_annotations);
3835 annotations->set_fields_annotations(_fields_annotations);
3836 annotations->set_fields_type_annotations(_fields_type_annotations);
3837
3838 // This is the Annotations object that will be
3839 // assigned to InstanceKlass being constructed.
3840 _combined_annotations = annotations;
3841
3842 // The annotations arrays below has been transfered the
3843 // _combined_annotations so these fields can now be cleared.
3844 _class_annotations = NULL;
3845 _class_type_annotations = NULL;
3846 _fields_annotations = NULL;
3847 _fields_type_annotations = NULL;
3848 }
3849
3850 // Transfer ownership of metadata allocated to the InstanceKlass.
3851 void ClassFileParser::apply_parsed_class_metadata(
3852 InstanceKlass* this_klass,
3853 int java_fields_count,
3854 TRAPS) {
3855 assert(this_klass != NULL, "invariant");
3856
3857 _cp->set_pool_holder(this_klass);
3858 this_klass->set_constants(_cp);
3859 this_klass->set_fields(_fields, java_fields_count);
3860 this_klass->set_methods(_methods);
3861 this_klass->set_inner_classes(_inner_classes);
3862 this_klass->set_nest_members(_nest_members);
3863 this_klass->set_nest_host_index(_nest_host);
3864 this_klass->set_local_interfaces(_local_interfaces);
3865 this_klass->set_annotations(_combined_annotations);
3866 this_klass->set_record_components(_record_components);
3867 // Delay the setting of _transitive_interfaces until after initialize_supers() in
3868 // fill_instance_klass(). It is because the _transitive_interfaces may be shared with
3869 // its _super. If an OOM occurs while loading the current klass, its _super field
3870 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3871 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3872 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3873
3874 // Clear out these fields so they don't get deallocated by the destructor
3875 clear_class_metadata();
3876 }
3877
3878 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3879 int runtime_visible_annotations_length,
3880 const u1* const runtime_invisible_annotations,
3881 int runtime_invisible_annotations_length,
3882 TRAPS) {
3883 AnnotationArray* annotations = NULL;
3884 if (runtime_visible_annotations != NULL ||
3885 runtime_invisible_annotations != NULL) {
3886 annotations = MetadataFactory::new_array<u1>(_loader_data,
3887 runtime_visible_annotations_length +
3888 runtime_invisible_annotations_length,
3889 CHECK_(annotations));
3890 if (runtime_visible_annotations != NULL) {
3891 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3892 annotations->at_put(i, runtime_visible_annotations[i]);
3893 }
3894 }
3895 if (runtime_invisible_annotations != NULL) {
3896 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3897 int append = runtime_visible_annotations_length+i;
3898 annotations->at_put(append, runtime_invisible_annotations[i]);
3899 }
3900 }
3901 }
3902 return annotations;
3903 }
3904
3905 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3906 const int super_class_index,
3907 const bool need_verify,
3908 TRAPS) {
3909 assert(cp != NULL, "invariant");
3910 const InstanceKlass* super_klass = NULL;
3911
3912 if (super_class_index == 0) {
3913 check_property(_class_name == vmSymbols::java_lang_Object(),
3914 "Invalid superclass index %u in class file %s",
3915 super_class_index,
3916 CHECK_NULL);
3917 } else {
3918 check_property(valid_klass_reference_at(super_class_index),
3919 "Invalid superclass index %u in class file %s",
3920 super_class_index,
3921 CHECK_NULL);
3922 // The class name should be legal because it is checked when parsing constant pool.
3923 // However, make sure it is not an array type.
3924 bool is_array = false;
3925 if (cp->tag_at(super_class_index).is_klass()) {
3926 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3927 if (need_verify)
3928 is_array = super_klass->is_array_klass();
3929 } else if (need_verify) {
3930 is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3931 }
3932 if (need_verify) {
3933 guarantee_property(!is_array,
3934 "Bad superclass name in class file %s", CHECK_NULL);
3935 }
3936 }
3937 return super_klass;
3938 }
3939
3940 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3941 unsigned int nonstatic_oop_map_count,
3942 int first_nonstatic_oop_offset) {
3943
3944 unsigned int map_count =
3945 NULL == super ? 0 : super->nonstatic_oop_map_count();
3946 if (nonstatic_oop_map_count > 0) {
3947 // We have oops to add to map
3948 if (map_count == 0) {
3949 map_count = nonstatic_oop_map_count;
3950 }
3951 else {
3952 // Check whether we should add a new map block or whether the last one can
3953 // be extended
3954 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3955 const OopMapBlock* const last_map = first_map + map_count - 1;
3956
3957 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3958 if (next_offset == first_nonstatic_oop_offset) {
3959 // There is no gap bettwen superklass's last oop field and first
3960 // local oop field, merge maps.
3961 nonstatic_oop_map_count -= 1;
3962 }
3963 else {
3964 // Superklass didn't end with a oop field, add extra maps
3965 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3966 }
3967 map_count += nonstatic_oop_map_count;
3968 }
3969 }
3970 return map_count;
3971 }
3972
3973 #ifndef PRODUCT
3974 static void print_field_layout(const Symbol* name,
3975 Array<u2>* fields,
3976 const constantPoolHandle& cp,
3977 int instance_size,
3978 int instance_fields_start,
3979 int instance_fields_end,
3980 int static_fields_end) {
3981
3982 assert(name != NULL, "invariant");
3983
3984 tty->print("%s: field layout\n", name->as_klass_external_name());
3985 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3986 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3987 if (!fs.access_flags().is_static()) {
3988 tty->print(" @%3d \"%s\" %s\n",
3989 fs.offset(),
3990 fs.name()->as_klass_external_name(),
3991 fs.signature()->as_klass_external_name());
3992 }
3993 }
3994 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3995 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3996 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3997 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3998 if (fs.access_flags().is_static()) {
3999 tty->print(" @%3d \"%s\" %s\n",
4000 fs.offset(),
4001 fs.name()->as_klass_external_name(),
4002 fs.signature()->as_klass_external_name());
4003 }
4004 }
4005 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
4006 tty->print("\n");
4007 }
4008 #endif
4009
4010 // Values needed for oopmap and InstanceKlass creation
4011 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
4012 public:
4013 int* nonstatic_oop_offsets;
4014 unsigned int* nonstatic_oop_counts;
4015 unsigned int nonstatic_oop_map_count;
4016 unsigned int total_oop_map_count;
4017 int instance_size;
4018 int nonstatic_field_size;
4019 int static_field_size;
4020 bool has_nonstatic_fields;
4021 };
4022
4023 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
4024 void ClassFileParser::layout_fields(ConstantPool* cp,
4025 const FieldAllocationCount* fac,
4026 const ClassAnnotationCollector* parsed_annotations,
4027 FieldLayoutInfo* info,
4028 TRAPS) {
4029
4030 assert(cp != NULL, "invariant");
4031
4032 // Field size and offset computation
4033 int nonstatic_field_size = _super_klass == NULL ? 0 :
4034 _super_klass->nonstatic_field_size();
4035
4036 // Count the contended fields by type.
4037 //
4038 // We ignore static fields, because @Contended is not supported for them.
4039 // The layout code below will also ignore the static fields.
4040 int nonstatic_contended_count = 0;
4041 FieldAllocationCount fac_contended;
4042 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4043 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4044 if (fs.is_contended()) {
4045 fac_contended.count[atype]++;
4046 if (!fs.access_flags().is_static()) {
4047 nonstatic_contended_count++;
4048 }
4049 }
4050 }
4051
4052
4053 // Calculate the starting byte offsets
4054 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
4055 int next_static_double_offset = next_static_oop_offset +
4056 ((fac->count[STATIC_OOP]) * heapOopSize);
4057 if (fac->count[STATIC_DOUBLE]) {
4058 next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
4059 }
4060
4061 int next_static_word_offset = next_static_double_offset +
4062 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
4063 int next_static_short_offset = next_static_word_offset +
4064 ((fac->count[STATIC_WORD]) * BytesPerInt);
4065 int next_static_byte_offset = next_static_short_offset +
4066 ((fac->count[STATIC_SHORT]) * BytesPerShort);
4067
4068 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
4069 nonstatic_field_size * heapOopSize;
4070
4071 int next_nonstatic_field_offset = nonstatic_fields_start;
4072
4073 const bool is_contended_class = parsed_annotations->is_contended();
4074
4075 // Class is contended, pad before all the fields
4076 if (is_contended_class) {
4077 next_nonstatic_field_offset += ContendedPaddingWidth;
4078 }
4079
4080 // Compute the non-contended fields count.
4081 // The packing code below relies on these counts to determine if some field
4082 // can be squeezed into the alignment gap. Contended fields are obviously
4083 // exempt from that.
4084 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
4085 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
4086 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
4087 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
4088 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
4089
4090 // Total non-static fields count, including every contended field
4091 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
4092 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
4093 fac->count[NONSTATIC_OOP];
4094
4095 const bool super_has_nonstatic_fields =
4096 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
4097 const bool has_nonstatic_fields =
4098 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
4099
4100
4101 // Prepare list of oops for oop map generation.
4102 //
4103 // "offset" and "count" lists are describing the set of contiguous oop
4104 // regions. offset[i] is the start of the i-th region, which then has
4105 // count[i] oops following. Before we know how many regions are required,
4106 // we pessimistically allocate the maps to fit all the oops into the
4107 // distinct regions.
4108 //
4109 // TODO: We add +1 to always allocate non-zero resource arrays; we need
4110 // to figure out if we still need to do this.
4111 unsigned int nonstatic_oop_map_count = 0;
4112 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
4113
4114 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
4115 THREAD, int, max_nonstatic_oop_maps);
4116 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
4117 THREAD, unsigned int, max_nonstatic_oop_maps);
4118
4119 int first_nonstatic_oop_offset = 0; // will be set for first oop field
4120
4121 bool compact_fields = CompactFields;
4122 int allocation_style = FieldsAllocationStyle;
4123 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
4124 assert(false, "0 <= FieldsAllocationStyle <= 2");
4125 allocation_style = 1; // Optimistic
4126 }
4127
4128 // The next classes have predefined hard-coded fields offsets
4129 // (see in JavaClasses::compute_hard_coded_offsets()).
4130 // Use default fields allocation order for them.
4131 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
4132 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
4133 _class_name == vmSymbols::java_lang_Class() ||
4134 _class_name == vmSymbols::java_lang_ClassLoader() ||
4135 _class_name == vmSymbols::java_lang_ref_Reference() ||
4136 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
4137 _class_name == vmSymbols::java_lang_StackTraceElement() ||
4138 _class_name == vmSymbols::java_lang_String() ||
4139 _class_name == vmSymbols::java_lang_Throwable() ||
4140 _class_name == vmSymbols::java_lang_Boolean() ||
4141 _class_name == vmSymbols::java_lang_Character() ||
4142 _class_name == vmSymbols::java_lang_Float() ||
4143 _class_name == vmSymbols::java_lang_Double() ||
4144 _class_name == vmSymbols::java_lang_Byte() ||
4145 _class_name == vmSymbols::java_lang_Short() ||
4146 _class_name == vmSymbols::java_lang_Integer() ||
4147 _class_name == vmSymbols::java_lang_Long())) {
4148 allocation_style = 0; // Allocate oops first
4149 compact_fields = false; // Don't compact fields
4150 }
4151
4152 int next_nonstatic_oop_offset = 0;
4153 int next_nonstatic_double_offset = 0;
4154
4155 // Rearrange fields for a given allocation style
4156 if( allocation_style == 0 ) {
4157 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
4158 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4159 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4160 (nonstatic_oop_count * heapOopSize);
4161 } else if( allocation_style == 1 ) {
4162 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
4163 next_nonstatic_double_offset = next_nonstatic_field_offset;
4164 } else if( allocation_style == 2 ) {
4165 // Fields allocation: oops fields in super and sub classes are together.
4166 if( nonstatic_field_size > 0 && _super_klass != NULL &&
4167 _super_klass->nonstatic_oop_map_size() > 0 ) {
4168 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
4169 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
4170 const OopMapBlock* const last_map = first_map + map_count - 1;
4171 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
4172 if (next_offset == next_nonstatic_field_offset) {
4173 allocation_style = 0; // allocate oops first
4174 next_nonstatic_oop_offset = next_nonstatic_field_offset;
4175 next_nonstatic_double_offset = next_nonstatic_oop_offset +
4176 (nonstatic_oop_count * heapOopSize);
4177 }
4178 }
4179 if( allocation_style == 2 ) {
4180 allocation_style = 1; // allocate oops last
4181 next_nonstatic_double_offset = next_nonstatic_field_offset;
4182 }
4183 } else {
4184 ShouldNotReachHere();
4185 }
4186
4187 int nonstatic_oop_space_count = 0;
4188 int nonstatic_word_space_count = 0;
4189 int nonstatic_short_space_count = 0;
4190 int nonstatic_byte_space_count = 0;
4191 int nonstatic_oop_space_offset = 0;
4192 int nonstatic_word_space_offset = 0;
4193 int nonstatic_short_space_offset = 0;
4194 int nonstatic_byte_space_offset = 0;
4195
4196 // Try to squeeze some of the fields into the gaps due to
4197 // long/double alignment.
4198 if (nonstatic_double_count > 0) {
4199 int offset = next_nonstatic_double_offset;
4200 next_nonstatic_double_offset = align_up(offset, BytesPerLong);
4201 if (compact_fields && offset != next_nonstatic_double_offset) {
4202 // Allocate available fields into the gap before double field.
4203 int length = next_nonstatic_double_offset - offset;
4204 assert(length == BytesPerInt, "");
4205 nonstatic_word_space_offset = offset;
4206 if (nonstatic_word_count > 0) {
4207 nonstatic_word_count -= 1;
4208 nonstatic_word_space_count = 1; // Only one will fit
4209 length -= BytesPerInt;
4210 offset += BytesPerInt;
4211 }
4212 nonstatic_short_space_offset = offset;
4213 while (length >= BytesPerShort && nonstatic_short_count > 0) {
4214 nonstatic_short_count -= 1;
4215 nonstatic_short_space_count += 1;
4216 length -= BytesPerShort;
4217 offset += BytesPerShort;
4218 }
4219 nonstatic_byte_space_offset = offset;
4220 while (length > 0 && nonstatic_byte_count > 0) {
4221 nonstatic_byte_count -= 1;
4222 nonstatic_byte_space_count += 1;
4223 length -= 1;
4224 }
4225 // Allocate oop field in the gap if there are no other fields for that.
4226 nonstatic_oop_space_offset = offset;
4227 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4228 allocation_style != 0) { // when oop fields not first
4229 nonstatic_oop_count -= 1;
4230 nonstatic_oop_space_count = 1; // Only one will fit
4231 length -= heapOopSize;
4232 offset += heapOopSize;
4233 }
4234 }
4235 }
4236
4237 int next_nonstatic_word_offset = next_nonstatic_double_offset +
4238 (nonstatic_double_count * BytesPerLong);
4239 int next_nonstatic_short_offset = next_nonstatic_word_offset +
4240 (nonstatic_word_count * BytesPerInt);
4241 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4242 (nonstatic_short_count * BytesPerShort);
4243 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4244 nonstatic_byte_count;
4245
4246 // let oops jump before padding with this allocation style
4247 if( allocation_style == 1 ) {
4248 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4249 if( nonstatic_oop_count > 0 ) {
4250 next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4251 }
4252 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4253 }
4254
4255 // Iterate over fields again and compute correct offsets.
4256 // The field allocation type was temporarily stored in the offset slot.
4257 // oop fields are located before non-oop fields (static and non-static).
4258 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4259
4260 // skip already laid out fields
4261 if (fs.is_offset_set()) continue;
4262
4263 // contended instance fields are handled below
4264 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4265
4266 int real_offset = 0;
4267 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4268
4269 // pack the rest of the fields
4270 switch (atype) {
4271 case STATIC_OOP:
4272 real_offset = next_static_oop_offset;
4273 next_static_oop_offset += heapOopSize;
4274 break;
4275 case STATIC_BYTE:
4276 real_offset = next_static_byte_offset;
4277 next_static_byte_offset += 1;
4278 break;
4279 case STATIC_SHORT:
4280 real_offset = next_static_short_offset;
4281 next_static_short_offset += BytesPerShort;
4282 break;
4283 case STATIC_WORD:
4284 real_offset = next_static_word_offset;
4285 next_static_word_offset += BytesPerInt;
4286 break;
4287 case STATIC_DOUBLE:
4288 real_offset = next_static_double_offset;
4289 next_static_double_offset += BytesPerLong;
4290 break;
4291 case NONSTATIC_OOP:
4292 if( nonstatic_oop_space_count > 0 ) {
4293 real_offset = nonstatic_oop_space_offset;
4294 nonstatic_oop_space_offset += heapOopSize;
4295 nonstatic_oop_space_count -= 1;
4296 } else {
4297 real_offset = next_nonstatic_oop_offset;
4298 next_nonstatic_oop_offset += heapOopSize;
4299 }
4300
4301 // Record this oop in the oop maps
4302 if( nonstatic_oop_map_count > 0 &&
4303 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4304 real_offset -
4305 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4306 heapOopSize ) {
4307 // This oop is adjacent to the previous one, add to current oop map
4308 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4309 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4310 } else {
4311 // This oop is not adjacent to the previous one, create new oop map
4312 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4313 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4314 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4315 nonstatic_oop_map_count += 1;
4316 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4317 first_nonstatic_oop_offset = real_offset;
4318 }
4319 }
4320 break;
4321 case NONSTATIC_BYTE:
4322 if( nonstatic_byte_space_count > 0 ) {
4323 real_offset = nonstatic_byte_space_offset;
4324 nonstatic_byte_space_offset += 1;
4325 nonstatic_byte_space_count -= 1;
4326 } else {
4327 real_offset = next_nonstatic_byte_offset;
4328 next_nonstatic_byte_offset += 1;
4329 }
4330 break;
4331 case NONSTATIC_SHORT:
4332 if( nonstatic_short_space_count > 0 ) {
4333 real_offset = nonstatic_short_space_offset;
4334 nonstatic_short_space_offset += BytesPerShort;
4335 nonstatic_short_space_count -= 1;
4336 } else {
4337 real_offset = next_nonstatic_short_offset;
4338 next_nonstatic_short_offset += BytesPerShort;
4339 }
4340 break;
4341 case NONSTATIC_WORD:
4342 if( nonstatic_word_space_count > 0 ) {
4343 real_offset = nonstatic_word_space_offset;
4344 nonstatic_word_space_offset += BytesPerInt;
4345 nonstatic_word_space_count -= 1;
4346 } else {
4347 real_offset = next_nonstatic_word_offset;
4348 next_nonstatic_word_offset += BytesPerInt;
4349 }
4350 break;
4351 case NONSTATIC_DOUBLE:
4352 real_offset = next_nonstatic_double_offset;
4353 next_nonstatic_double_offset += BytesPerLong;
4354 break;
4355 default:
4356 ShouldNotReachHere();
4357 }
4358 fs.set_offset(real_offset);
4359 }
4360
4361
4362 // Handle the contended cases.
4363 //
4364 // Each contended field should not intersect the cache line with another contended field.
4365 // In the absence of alignment information, we end up with pessimistically separating
4366 // the fields with full-width padding.
4367 //
4368 // Additionally, this should not break alignment for the fields, so we round the alignment up
4369 // for each field.
4370 if (nonstatic_contended_count > 0) {
4371
4372 // if there is at least one contended field, we need to have pre-padding for them
4373 next_nonstatic_padded_offset += ContendedPaddingWidth;
4374
4375 // collect all contended groups
4376 ResourceBitMap bm(cp->size());
4377 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4378 // skip already laid out fields
4379 if (fs.is_offset_set()) continue;
4380
4381 if (fs.is_contended()) {
4382 bm.set_bit(fs.contended_group());
4383 }
4384 }
4385
4386 int current_group = -1;
4387 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4388
4389 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4390
4391 // skip already laid out fields
4392 if (fs.is_offset_set()) continue;
4393
4394 // skip non-contended fields and fields from different group
4395 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4396
4397 // handle statics below
4398 if (fs.access_flags().is_static()) continue;
4399
4400 int real_offset = 0;
4401 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4402
4403 switch (atype) {
4404 case NONSTATIC_BYTE:
4405 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4406 real_offset = next_nonstatic_padded_offset;
4407 next_nonstatic_padded_offset += 1;
4408 break;
4409
4410 case NONSTATIC_SHORT:
4411 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4412 real_offset = next_nonstatic_padded_offset;
4413 next_nonstatic_padded_offset += BytesPerShort;
4414 break;
4415
4416 case NONSTATIC_WORD:
4417 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4418 real_offset = next_nonstatic_padded_offset;
4419 next_nonstatic_padded_offset += BytesPerInt;
4420 break;
4421
4422 case NONSTATIC_DOUBLE:
4423 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4424 real_offset = next_nonstatic_padded_offset;
4425 next_nonstatic_padded_offset += BytesPerLong;
4426 break;
4427
4428 case NONSTATIC_OOP:
4429 next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4430 real_offset = next_nonstatic_padded_offset;
4431 next_nonstatic_padded_offset += heapOopSize;
4432
4433 // Record this oop in the oop maps
4434 if( nonstatic_oop_map_count > 0 &&
4435 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4436 real_offset -
4437 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4438 heapOopSize ) {
4439 // This oop is adjacent to the previous one, add to current oop map
4440 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4441 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4442 } else {
4443 // This oop is not adjacent to the previous one, create new oop map
4444 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4445 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4446 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4447 nonstatic_oop_map_count += 1;
4448 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4449 first_nonstatic_oop_offset = real_offset;
4450 }
4451 }
4452 break;
4453
4454 default:
4455 ShouldNotReachHere();
4456 }
4457
4458 if (fs.contended_group() == 0) {
4459 // Contended group defines the equivalence class over the fields:
4460 // the fields within the same contended group are not inter-padded.
4461 // The only exception is default group, which does not incur the
4462 // equivalence, and so requires intra-padding.
4463 next_nonstatic_padded_offset += ContendedPaddingWidth;
4464 }
4465
4466 fs.set_offset(real_offset);
4467 } // for
4468
4469 // Start laying out the next group.
4470 // Note that this will effectively pad the last group in the back;
4471 // this is expected to alleviate memory contention effects for
4472 // subclass fields and/or adjacent object.
4473 // If this was the default group, the padding is already in place.
4474 if (current_group != 0) {
4475 next_nonstatic_padded_offset += ContendedPaddingWidth;
4476 }
4477 }
4478
4479 // handle static fields
4480 }
4481
4482 // Entire class is contended, pad in the back.
4483 // This helps to alleviate memory contention effects for subclass fields
4484 // and/or adjacent object.
4485 if (is_contended_class) {
4486 next_nonstatic_padded_offset += ContendedPaddingWidth;
4487 }
4488
4489 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4490
4491 int nonstatic_fields_end = align_up(notaligned_nonstatic_fields_end, heapOopSize);
4492 int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
4493 int static_fields_end = align_up(next_static_byte_offset, wordSize);
4494
4495 int static_field_size = (static_fields_end -
4496 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4497 nonstatic_field_size = nonstatic_field_size +
4498 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4499
4500 int instance_size = align_object_size(instance_end / wordSize);
4501
4502 assert(instance_size == align_object_size(align_up(
4503 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4504 wordSize) / wordSize), "consistent layout helper value");
4505
4506 // Invariant: nonstatic_field end/start should only change if there are
4507 // nonstatic fields in the class, or if the class is contended. We compare
4508 // against the non-aligned value, so that end alignment will not fail the
4509 // assert without actually having the fields.
4510 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4511 is_contended_class ||
4512 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4513
4514 // Number of non-static oop map blocks allocated at end of klass.
4515 const unsigned int total_oop_map_count =
4516 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4517 first_nonstatic_oop_offset);
4518
4519 #ifndef PRODUCT
4520 if (PrintFieldLayout) {
4521 print_field_layout(_class_name,
4522 _fields,
4523 cp,
4524 instance_size,
4525 nonstatic_fields_start,
4526 nonstatic_fields_end,
4527 static_fields_end);
4528 }
4529
4530 #endif
4531 // Pass back information needed for InstanceKlass creation
4532 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4533 info->nonstatic_oop_counts = nonstatic_oop_counts;
4534 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4535 info->total_oop_map_count = total_oop_map_count;
4536 info->instance_size = instance_size;
4537 info->static_field_size = static_field_size;
4538 info->nonstatic_field_size = nonstatic_field_size;
4539 info->has_nonstatic_fields = has_nonstatic_fields;
4540 }
4541
4542 static void fill_oop_maps(const InstanceKlass* k,
4543 unsigned int nonstatic_oop_map_count,
4544 const int* nonstatic_oop_offsets,
4545 const unsigned int* nonstatic_oop_counts) {
4546
4547 assert(k != NULL, "invariant");
4548
4549 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4550 const InstanceKlass* const super = k->superklass();
4551 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4552 if (super_count > 0) {
4553 // Copy maps from superklass
4554 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4555 for (unsigned int i = 0; i < super_count; ++i) {
4556 *this_oop_map++ = *super_oop_map++;
4557 }
4558 }
4559
4560 if (nonstatic_oop_map_count > 0) {
4561 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4562 // The counts differ because there is no gap between superklass's last oop
4563 // field and the first local oop field. Extend the last oop map copied
4564 // from the superklass instead of creating new one.
4565 nonstatic_oop_map_count--;
4566 nonstatic_oop_offsets++;
4567 this_oop_map--;
4568 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4569 this_oop_map++;
4570 }
4571
4572 // Add new map blocks, fill them
4573 while (nonstatic_oop_map_count-- > 0) {
4574 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4575 this_oop_map->set_count(*nonstatic_oop_counts++);
4576 this_oop_map++;
4577 }
4578 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4579 this_oop_map, "sanity");
4580 }
4581 }
4582
4583
4584 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4585 assert(ik != NULL, "invariant");
4586
4587 const Klass* const super = ik->super();
4588
4589 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4590 // in which case we don't have to register objects as finalizable
4591 if (!_has_empty_finalizer) {
4592 if (_has_finalizer ||
4593 (super != NULL && super->has_finalizer())) {
4594 ik->set_has_finalizer();
4595 }
4596 }
4597
4598 #ifdef ASSERT
4599 bool f = false;
4600 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4601 vmSymbols::void_method_signature());
4602 if (m != NULL && !m->is_empty_method()) {
4603 f = true;
4604 }
4605
4606 // Spec doesn't prevent agent from redefinition of empty finalizer.
4607 // Despite the fact that it's generally bad idea and redefined finalizer
4608 // will not work as expected we shouldn't abort vm in this case
4609 if (!ik->has_redefined_this_or_super()) {
4610 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4611 }
4612 #endif
4613
4614 // Check if this klass supports the java.lang.Cloneable interface
4615 if (SystemDictionary::Cloneable_klass_loaded()) {
4616 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4617 ik->set_is_cloneable();
4618 }
4619 }
4620
4621 // Check if this klass has a vanilla default constructor
4622 if (super == NULL) {
4623 // java.lang.Object has empty default constructor
4624 ik->set_has_vanilla_constructor();
4625 } else {
4626 if (super->has_vanilla_constructor() &&
4627 _has_vanilla_constructor) {
4628 ik->set_has_vanilla_constructor();
4629 }
4630 #ifdef ASSERT
4631 bool v = false;
4632 if (super->has_vanilla_constructor()) {
4633 const Method* const constructor =
4634 ik->find_method(vmSymbols::object_initializer_name(),
4635 vmSymbols::void_method_signature());
4636 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4637 v = true;
4638 }
4639 }
4640 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4641 #endif
4642 }
4643
4644 // If it cannot be fast-path allocated, set a bit in the layout helper.
4645 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4646 assert(ik->size_helper() > 0, "layout_helper is initialized");
4647 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4648 || ik->is_abstract() || ik->is_interface()
4649 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4650 || ik->size_helper() >= FastAllocateSizeLimit) {
4651 // Forbid fast-path allocation.
4652 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4653 ik->set_layout_helper(lh);
4654 }
4655 }
4656
4657 // utility methods for appending an array with check for duplicates
4658
4659 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4660 const Array<InstanceKlass*>* const ifs) {
4661 // iterate over new interfaces
4662 for (int i = 0; i < ifs->length(); i++) {
4663 InstanceKlass* const e = ifs->at(i);
4664 assert(e->is_klass() && e->is_interface(), "just checking");
4665 // add new interface
4666 result->append_if_missing(e);
4667 }
4668 }
4669
4670 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4671 Array<InstanceKlass*>* local_ifs,
4672 ClassLoaderData* loader_data,
4673 TRAPS) {
4674 assert(local_ifs != NULL, "invariant");
4675 assert(loader_data != NULL, "invariant");
4676
4677 // Compute maximum size for transitive interfaces
4678 int max_transitive_size = 0;
4679 int super_size = 0;
4680 // Add superclass transitive interfaces size
4681 if (super != NULL) {
4682 super_size = super->transitive_interfaces()->length();
4683 max_transitive_size += super_size;
4684 }
4685 // Add local interfaces' super interfaces
4686 const int local_size = local_ifs->length();
4687 for (int i = 0; i < local_size; i++) {
4688 InstanceKlass* const l = local_ifs->at(i);
4689 max_transitive_size += l->transitive_interfaces()->length();
4690 }
4691 // Finally add local interfaces
4692 max_transitive_size += local_size;
4693 // Construct array
4694 if (max_transitive_size == 0) {
4695 // no interfaces, use canonicalized array
4696 return Universe::the_empty_instance_klass_array();
4697 } else if (max_transitive_size == super_size) {
4698 // no new local interfaces added, share superklass' transitive interface array
4699 return super->transitive_interfaces();
4700 } else if (max_transitive_size == local_size) {
4701 // only local interfaces added, share local interface array
4702 return local_ifs;
4703 } else {
4704 ResourceMark rm;
4705 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4706
4707 // Copy down from superclass
4708 if (super != NULL) {
4709 append_interfaces(result, super->transitive_interfaces());
4710 }
4711
4712 // Copy down from local interfaces' superinterfaces
4713 for (int i = 0; i < local_size; i++) {
4714 InstanceKlass* const l = local_ifs->at(i);
4715 append_interfaces(result, l->transitive_interfaces());
4716 }
4717 // Finally add local interfaces
4718 append_interfaces(result, local_ifs);
4719
4720 // length will be less than the max_transitive_size if duplicates were removed
4721 const int length = result->length();
4722 assert(length <= max_transitive_size, "just checking");
4723 Array<InstanceKlass*>* const new_result =
4724 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4725 for (int i = 0; i < length; i++) {
4726 InstanceKlass* const e = result->at(i);
4727 assert(e != NULL, "just checking");
4728 new_result->at_put(i, e);
4729 }
4730 return new_result;
4731 }
4732 }
4733
4734 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4735 assert(this_klass != NULL, "invariant");
4736 const Klass* const super = this_klass->super();
4737
4738 if (super != NULL) {
4739
4740 // If the loader is not the boot loader then throw an exception if its
4741 // superclass is in package jdk.internal.reflect and its loader is not a
4742 // special reflection class loader
4743 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4744 assert(super->is_instance_klass(), "super is not instance klass");
4745 PackageEntry* super_package = super->package();
4746 if (super_package != NULL &&
4747 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4748 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4749 ResourceMark rm(THREAD);
4750 Exceptions::fthrow(
4751 THREAD_AND_LOCATION,
4752 vmSymbols::java_lang_IllegalAccessError(),
4753 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4754 this_klass->external_name(),
4755 this_klass->class_loader_data()->loader_name_and_id(),
4756 super->external_name());
4757 return;
4758 }
4759 }
4760
4761 Reflection::VerifyClassAccessResults vca_result =
4762 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4763 if (vca_result != Reflection::ACCESS_OK) {
4764 ResourceMark rm(THREAD);
4765 char* msg = Reflection::verify_class_access_msg(this_klass,
4766 InstanceKlass::cast(super),
4767 vca_result);
4768 if (msg == NULL) {
4769 bool same_module = (this_klass->module() == super->module());
4770 Exceptions::fthrow(
4771 THREAD_AND_LOCATION,
4772 vmSymbols::java_lang_IllegalAccessError(),
4773 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4774 this_klass->external_name(),
4775 super->is_abstract() ? "abstract " : "",
4776 super->external_name(),
4777 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4778 (same_module) ? "" : "; ",
4779 (same_module) ? "" : super->class_in_module_of_loader());
4780 } else {
4781 // Add additional message content.
4782 Exceptions::fthrow(
4783 THREAD_AND_LOCATION,
4784 vmSymbols::java_lang_IllegalAccessError(),
4785 "superclass access check failed: %s",
4786 msg);
4787 }
4788 }
4789 }
4790 }
4791
4792
4793 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4794 assert(this_klass != NULL, "invariant");
4795 const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4796 const int lng = local_interfaces->length();
4797 for (int i = lng - 1; i >= 0; i--) {
4798 InstanceKlass* const k = local_interfaces->at(i);
4799 assert (k != NULL && k->is_interface(), "invalid interface");
4800 Reflection::VerifyClassAccessResults vca_result =
4801 Reflection::verify_class_access(this_klass, k, false);
4802 if (vca_result != Reflection::ACCESS_OK) {
4803 ResourceMark rm(THREAD);
4804 char* msg = Reflection::verify_class_access_msg(this_klass,
4805 k,
4806 vca_result);
4807 if (msg == NULL) {
4808 bool same_module = (this_klass->module() == k->module());
4809 Exceptions::fthrow(
4810 THREAD_AND_LOCATION,
4811 vmSymbols::java_lang_IllegalAccessError(),
4812 "class %s cannot access its superinterface %s (%s%s%s)",
4813 this_klass->external_name(),
4814 k->external_name(),
4815 (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4816 (same_module) ? "" : "; ",
4817 (same_module) ? "" : k->class_in_module_of_loader());
4818 } else {
4819 // Add additional message content.
4820 Exceptions::fthrow(
4821 THREAD_AND_LOCATION,
4822 vmSymbols::java_lang_IllegalAccessError(),
4823 "superinterface check failed: %s",
4824 msg);
4825 }
4826 }
4827 }
4828 }
4829
4830
4831 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4832 assert(this_klass != NULL, "invariant");
4833 const Array<Method*>* const methods = this_klass->methods();
4834 const int num_methods = methods->length();
4835
4836 // go thru each method and check if it overrides a final method
4837 for (int index = 0; index < num_methods; index++) {
4838 const Method* const m = methods->at(index);
4839
4840 // skip private, static, and <init> methods
4841 if ((!m->is_private() && !m->is_static()) &&
4842 (m->name() != vmSymbols::object_initializer_name())) {
4843
4844 const Symbol* const name = m->name();
4845 const Symbol* const signature = m->signature();
4846 const Klass* k = this_klass->super();
4847 const Method* super_m = NULL;
4848 while (k != NULL) {
4849 // skip supers that don't have final methods.
4850 if (k->has_final_method()) {
4851 // lookup a matching method in the super class hierarchy
4852 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4853 if (super_m == NULL) {
4854 break; // didn't find any match; get out
4855 }
4856
4857 if (super_m->is_final() && !super_m->is_static() &&
4858 !super_m->access_flags().is_private()) {
4859 // matching method in super is final, and not static or private
4860 bool can_access = Reflection::verify_member_access(this_klass,
4861 super_m->method_holder(),
4862 super_m->method_holder(),
4863 super_m->access_flags(),
4864 false, false, CHECK);
4865 if (can_access) {
4866 // this class can access super final method and therefore override
4867 ResourceMark rm(THREAD);
4868 Exceptions::fthrow(THREAD_AND_LOCATION,
4869 vmSymbols::java_lang_VerifyError(),
4870 "class %s overrides final method %s.%s%s",
4871 this_klass->external_name(),
4872 super_m->method_holder()->external_name(),
4873 name->as_C_string(),
4874 signature->as_C_string()
4875 );
4876 return;
4877 }
4878 }
4879
4880 // continue to look from super_m's holder's super.
4881 k = super_m->method_holder()->super();
4882 continue;
4883 }
4884
4885 k = k->super();
4886 }
4887 }
4888 }
4889 }
4890
4891
4892 // assumes that this_klass is an interface
4893 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4894 assert(this_klass != NULL, "invariant");
4895 assert(this_klass->is_interface(), "not an interface");
4896 const Array<Method*>* methods = this_klass->methods();
4897 const int num_methods = methods->length();
4898
4899 for (int index = 0; index < num_methods; index++) {
4900 const Method* const m = methods->at(index);
4901 // if m is static and not the init method, throw a verify error
4902 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4903 ResourceMark rm(THREAD);
4904 Exceptions::fthrow(
4905 THREAD_AND_LOCATION,
4906 vmSymbols::java_lang_VerifyError(),
4907 "Illegal static method %s in interface %s",
4908 m->name()->as_C_string(),
4909 this_klass->external_name()
4910 );
4911 return;
4912 }
4913 }
4914 }
4915
4916 // utility methods for format checking
4917
4918 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4919 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4920 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4921 if (is_module) {
4922 ResourceMark rm(THREAD);
4923 Exceptions::fthrow(
4924 THREAD_AND_LOCATION,
4925 vmSymbols::java_lang_NoClassDefFoundError(),
4926 "%s is not a class because access_flag ACC_MODULE is set",
4927 _class_name->as_C_string());
4928 return;
4929 }
4930
4931 if (!_need_verify) { return; }
4932
4933 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4934 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4935 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4936 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4937 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4938 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4939 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4940 const bool major_gte_14 = _major_version >= JAVA_14_VERSION;
4941
4942 if ((is_abstract && is_final) ||
4943 (is_interface && !is_abstract) ||
4944 (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4945 (!is_interface && major_gte_1_5 && is_annotation)) {
4946 ResourceMark rm(THREAD);
4947 Exceptions::fthrow(
4948 THREAD_AND_LOCATION,
4949 vmSymbols::java_lang_ClassFormatError(),
4950 "Illegal class modifiers in class %s: 0x%X",
4951 _class_name->as_C_string(), flags
4952 );
4953 return;
4954 }
4955 }
4956
4957 static bool has_illegal_visibility(jint flags) {
4958 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4959 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4960 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4961
4962 return ((is_public && is_protected) ||
4963 (is_public && is_private) ||
4964 (is_protected && is_private));
4965 }
4966
4967 // A legal major_version.minor_version must be one of the following:
4968 //
4969 // Major_version >= 45 and major_version < 56, any minor_version.
4970 // Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4971 // Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4972 //
4973 static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4974 ResourceMark rm(THREAD);
4975 const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4976 if (major < JAVA_MIN_SUPPORTED_VERSION) {
4977 Exceptions::fthrow(
4978 THREAD_AND_LOCATION,
4979 vmSymbols::java_lang_UnsupportedClassVersionError(),
4980 "%s (class file version %u.%u) was compiled with an invalid major version",
4981 class_name->as_C_string(), major, minor);
4982 return;
4983 }
4984
4985 if (major > max_version) {
4986 Exceptions::fthrow(
4987 THREAD_AND_LOCATION,
4988 vmSymbols::java_lang_UnsupportedClassVersionError(),
4989 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4990 "this version of the Java Runtime only recognizes class file versions up to %u.0",
4991 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4992 return;
4993 }
4994
4995 if (major < JAVA_12_VERSION || minor == 0) {
4996 return;
4997 }
4998
4999 if (minor == JAVA_PREVIEW_MINOR_VERSION) {
5000 if (major != max_version) {
5001 Exceptions::fthrow(
5002 THREAD_AND_LOCATION,
5003 vmSymbols::java_lang_UnsupportedClassVersionError(),
5004 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
5005 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
5006 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
5007 return;
5008 }
5009
5010 if (!Arguments::enable_preview()) {
5011 Exceptions::fthrow(
5012 THREAD_AND_LOCATION,
5013 vmSymbols::java_lang_UnsupportedClassVersionError(),
5014 "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
5015 class_name->as_C_string(), major, minor);
5016 return;
5017 }
5018
5019 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
5020 Exceptions::fthrow(
5021 THREAD_AND_LOCATION,
5022 vmSymbols::java_lang_UnsupportedClassVersionError(),
5023 "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
5024 class_name->as_C_string(), major, minor);
5025 }
5026 }
5027
5028 void ClassFileParser::verify_legal_field_modifiers(jint flags,
5029 bool is_interface,
5030 TRAPS) const {
5031 if (!_need_verify) { return; }
5032
5033 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
5034 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
5035 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
5036 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
5037 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
5038 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
5039 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
5040 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
5041 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
5042
5043 bool is_illegal = false;
5044
5045 if (is_interface) {
5046 if (!is_public || !is_static || !is_final || is_private ||
5047 is_protected || is_volatile || is_transient ||
5048 (major_gte_1_5 && is_enum)) {
5049 is_illegal = true;
5050 }
5051 } else { // not interface
5052 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
5053 is_illegal = true;
5054 }
5055 }
5056
5057 if (is_illegal) {
5058 ResourceMark rm(THREAD);
5059 Exceptions::fthrow(
5060 THREAD_AND_LOCATION,
5061 vmSymbols::java_lang_ClassFormatError(),
5062 "Illegal field modifiers in class %s: 0x%X",
5063 _class_name->as_C_string(), flags);
5064 return;
5065 }
5066 }
5067
5068 void ClassFileParser::verify_legal_method_modifiers(jint flags,
5069 bool is_interface,
5070 const Symbol* name,
5071 TRAPS) const {
5072 if (!_need_verify) { return; }
5073
5074 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
5075 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
5076 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
5077 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
5078 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
5079 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
5080 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
5081 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
5082 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
5083 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
5084 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
5085 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
5086 const bool is_initializer = (name == vmSymbols::object_initializer_name());
5087
5088 bool is_illegal = false;
5089
5090 if (is_interface) {
5091 if (major_gte_8) {
5092 // Class file version is JAVA_8_VERSION or later Methods of
5093 // interfaces may set any of the flags except ACC_PROTECTED,
5094 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
5095 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
5096 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
5097 (is_native || is_protected || is_final || is_synchronized) ||
5098 // If a specific method of a class or interface has its
5099 // ACC_ABSTRACT flag set, it must not have any of its
5100 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
5101 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
5102 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
5103 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
5104 (is_abstract && (is_private || is_static || is_strict))) {
5105 is_illegal = true;
5106 }
5107 } else if (major_gte_1_5) {
5108 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
5109 if (!is_public || is_private || is_protected || is_static || is_final ||
5110 is_synchronized || is_native || !is_abstract || is_strict) {
5111 is_illegal = true;
5112 }
5113 } else {
5114 // Class file version is pre-JAVA_1_5_VERSION
5115 if (!is_public || is_static || is_final || is_native || !is_abstract) {
5116 is_illegal = true;
5117 }
5118 }
5119 } else { // not interface
5120 if (has_illegal_visibility(flags)) {
5121 is_illegal = true;
5122 } else {
5123 if (is_initializer) {
5124 if (is_static || is_final || is_synchronized || is_native ||
5125 is_abstract || (major_gte_1_5 && is_bridge)) {
5126 is_illegal = true;
5127 }
5128 } else { // not initializer
5129 if (is_abstract) {
5130 if ((is_final || is_native || is_private || is_static ||
5131 (major_gte_1_5 && (is_synchronized || is_strict)))) {
5132 is_illegal = true;
5133 }
5134 }
5135 }
5136 }
5137 }
5138
5139 if (is_illegal) {
5140 ResourceMark rm(THREAD);
5141 Exceptions::fthrow(
5142 THREAD_AND_LOCATION,
5143 vmSymbols::java_lang_ClassFormatError(),
5144 "Method %s in class %s has illegal modifiers: 0x%X",
5145 name->as_C_string(), _class_name->as_C_string(), flags);
5146 return;
5147 }
5148 }
5149
5150 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
5151 int length,
5152 TRAPS) const {
5153 assert(_need_verify, "only called when _need_verify is true");
5154 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
5155 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5156 }
5157 }
5158
5159 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5160 // In class names, '/' separates unqualified names. This is verified in this function also.
5161 // Method names also may not contain the characters '<' or '>', unless <init>
5162 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5163 // method. Because these names have been checked as special cases before
5164 // calling this method in verify_legal_method_name.
5165 //
5166 // This method is also called from the modular system APIs in modules.cpp
5167 // to verify the validity of module and package names.
5168 bool ClassFileParser::verify_unqualified_name(const char* name,
5169 unsigned int length,
5170 int type) {
5171 if (length == 0) return false; // Must have at least one char.
5172 for (const char* p = name; p != name + length; p++) {
5173 switch(*p) {
5174 case JVM_SIGNATURE_DOT:
5175 case JVM_SIGNATURE_ENDCLASS:
5176 case JVM_SIGNATURE_ARRAY:
5177 // do not permit '.', ';', or '['
5178 return false;
5179 case JVM_SIGNATURE_SLASH:
5180 // check for '//' or leading or trailing '/' which are not legal
5181 // unqualified name must not be empty
5182 if (type == ClassFileParser::LegalClass) {
5183 if (p == name || p+1 >= name+length ||
5184 *(p+1) == JVM_SIGNATURE_SLASH) {
5185 return false;
5186 }
5187 } else {
5188 return false; // do not permit '/' unless it's class name
5189 }
5190 break;
5191 case JVM_SIGNATURE_SPECIAL:
5192 case JVM_SIGNATURE_ENDSPECIAL:
5193 // do not permit '<' or '>' in method names
5194 if (type == ClassFileParser::LegalMethod) {
5195 return false;
5196 }
5197 }
5198 }
5199 return true;
5200 }
5201
5202 // Take pointer to a UTF8 byte string (not NUL-terminated).
5203 // Skip over the longest part of the string that could
5204 // be taken as a fieldname. Allow '/' if slash_ok is true.
5205 // Return a pointer to just past the fieldname.
5206 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5207 // being true, we saw consecutive slashes (meaning we were looking for a
5208 // qualified path but found something that was badly-formed).
5209 static const char* skip_over_field_name(const char* const name,
5210 bool slash_ok,
5211 unsigned int length) {
5212 const char* p;
5213 jboolean last_is_slash = false;
5214 jboolean not_first_ch = false;
5215
5216 for (p = name; p != name + length; not_first_ch = true) {
5217 const char* old_p = p;
5218 jchar ch = *p;
5219 if (ch < 128) {
5220 p++;
5221 // quick check for ascii
5222 if ((ch >= 'a' && ch <= 'z') ||
5223 (ch >= 'A' && ch <= 'Z') ||
5224 (ch == '_' || ch == '$') ||
5225 (not_first_ch && ch >= '0' && ch <= '9')) {
5226 last_is_slash = false;
5227 continue;
5228 }
5229 if (slash_ok && ch == JVM_SIGNATURE_SLASH) {
5230 if (last_is_slash) {
5231 return NULL; // Don't permit consecutive slashes
5232 }
5233 last_is_slash = true;
5234 continue;
5235 }
5236 }
5237 else {
5238 jint unicode_ch;
5239 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5240 p = tmp_p;
5241 last_is_slash = false;
5242 // Check if ch is Java identifier start or is Java identifier part
5243 // 4672820: call java.lang.Character methods directly without generating separate tables.
5244 EXCEPTION_MARK;
5245 // return value
5246 JavaValue result(T_BOOLEAN);
5247 // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5248 JavaCallArguments args;
5249 args.push_int(unicode_ch);
5250
5251 if (not_first_ch) {
5252 // public static boolean isJavaIdentifierPart(char ch);
5253 JavaCalls::call_static(&result,
5254 SystemDictionary::Character_klass(),
5255 vmSymbols::isJavaIdentifierPart_name(),
5256 vmSymbols::int_bool_signature(),
5257 &args,
5258 THREAD);
5259 } else {
5260 // public static boolean isJavaIdentifierStart(char ch);
5261 JavaCalls::call_static(&result,
5262 SystemDictionary::Character_klass(),
5263 vmSymbols::isJavaIdentifierStart_name(),
5264 vmSymbols::int_bool_signature(),
5265 &args,
5266 THREAD);
5267 }
5268 if (HAS_PENDING_EXCEPTION) {
5269 CLEAR_PENDING_EXCEPTION;
5270 return NULL;
5271 }
5272 if(result.get_jboolean()) {
5273 continue;
5274 }
5275 }
5276 return (not_first_ch) ? old_p : NULL;
5277 }
5278 return (not_first_ch) ? p : NULL;
5279 }
5280
5281 // Take pointer to a UTF8 byte string (not NUL-terminated).
5282 // Skip over the longest part of the string that could
5283 // be taken as a field signature. Allow "void" if void_ok.
5284 // Return a pointer to just past the signature.
5285 // Return NULL if no legal signature is found.
5286 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5287 bool void_ok,
5288 unsigned int length,
5289 TRAPS) const {
5290 unsigned int array_dim = 0;
5291 while (length > 0) {
5292 switch (signature[0]) {
5293 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5294 case JVM_SIGNATURE_BOOLEAN:
5295 case JVM_SIGNATURE_BYTE:
5296 case JVM_SIGNATURE_CHAR:
5297 case JVM_SIGNATURE_SHORT:
5298 case JVM_SIGNATURE_INT:
5299 case JVM_SIGNATURE_FLOAT:
5300 case JVM_SIGNATURE_LONG:
5301 case JVM_SIGNATURE_DOUBLE:
5302 return signature + 1;
5303 case JVM_SIGNATURE_CLASS: {
5304 if (_major_version < JAVA_1_5_VERSION) {
5305 // Skip over the class name if one is there
5306 const char* const p = skip_over_field_name(signature + 1, true, --length);
5307
5308 // The next character better be a semicolon
5309 if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
5310 return p + 1;
5311 }
5312 }
5313 else {
5314 // Skip leading 'L' and ignore first appearance of ';'
5315 signature++;
5316 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
5317 // Format check signature
5318 if (c != NULL) {
5319 int newlen = c - (char*) signature;
5320 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5321 if (!legal) {
5322 classfile_parse_error("Class name is empty or contains illegal character "
5323 "in descriptor in class file %s",
5324 CHECK_0);
5325 return NULL;
5326 }
5327 return signature + newlen + 1;
5328 }
5329 }
5330 return NULL;
5331 }
5332 case JVM_SIGNATURE_ARRAY:
5333 array_dim++;
5334 if (array_dim > 255) {
5335 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5336 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5337 }
5338 // The rest of what's there better be a legal signature
5339 signature++;
5340 length--;
5341 void_ok = false;
5342 break;
5343 default:
5344 return NULL;
5345 }
5346 }
5347 return NULL;
5348 }
5349
5350 // Checks if name is a legal class name.
5351 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5352 if (!_need_verify || _relax_verify) { return; }
5353
5354 assert(name->refcount() > 0, "symbol must be kept alive");
5355 char* bytes = (char*)name->bytes();
5356 unsigned int length = name->utf8_length();
5357 bool legal = false;
5358
5359 if (length > 0) {
5360 const char* p;
5361 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5362 p = skip_over_field_signature(bytes, false, length, CHECK);
5363 legal = (p != NULL) && ((p - bytes) == (int)length);
5364 } else if (_major_version < JAVA_1_5_VERSION) {
5365 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5366 p = skip_over_field_name(bytes, true, length);
5367 legal = (p != NULL) && ((p - bytes) == (int)length);
5368 }
5369 } else {
5370 // 4900761: relax the constraints based on JSR202 spec
5371 // Class names may be drawn from the entire Unicode character set.
5372 // Identifiers between '/' must be unqualified names.
5373 // The utf8 string has been verified when parsing cpool entries.
5374 legal = verify_unqualified_name(bytes, length, LegalClass);
5375 }
5376 }
5377 if (!legal) {
5378 ResourceMark rm(THREAD);
5379 assert(_class_name != NULL, "invariant");
5380 Exceptions::fthrow(
5381 THREAD_AND_LOCATION,
5382 vmSymbols::java_lang_ClassFormatError(),
5383 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5384 _class_name->as_C_string()
5385 );
5386 return;
5387 }
5388 }
5389
5390 // Checks if name is a legal field name.
5391 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5392 if (!_need_verify || _relax_verify) { return; }
5393
5394 char* bytes = (char*)name->bytes();
5395 unsigned int length = name->utf8_length();
5396 bool legal = false;
5397
5398 if (length > 0) {
5399 if (_major_version < JAVA_1_5_VERSION) {
5400 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5401 const char* p = skip_over_field_name(bytes, false, length);
5402 legal = (p != NULL) && ((p - bytes) == (int)length);
5403 }
5404 } else {
5405 // 4881221: relax the constraints based on JSR202 spec
5406 legal = verify_unqualified_name(bytes, length, LegalField);
5407 }
5408 }
5409
5410 if (!legal) {
5411 ResourceMark rm(THREAD);
5412 assert(_class_name != NULL, "invariant");
5413 Exceptions::fthrow(
5414 THREAD_AND_LOCATION,
5415 vmSymbols::java_lang_ClassFormatError(),
5416 "Illegal field name \"%.*s\" in class %s", length, bytes,
5417 _class_name->as_C_string()
5418 );
5419 return;
5420 }
5421 }
5422
5423 // Checks if name is a legal method name.
5424 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5425 if (!_need_verify || _relax_verify) { return; }
5426
5427 assert(name != NULL, "method name is null");
5428 char* bytes = (char*)name->bytes();
5429 unsigned int length = name->utf8_length();
5430 bool legal = false;
5431
5432 if (length > 0) {
5433 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
5434 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5435 legal = true;
5436 }
5437 } else if (_major_version < JAVA_1_5_VERSION) {
5438 const char* p;
5439 p = skip_over_field_name(bytes, false, length);
5440 legal = (p != NULL) && ((p - bytes) == (int)length);
5441 } else {
5442 // 4881221: relax the constraints based on JSR202 spec
5443 legal = verify_unqualified_name(bytes, length, LegalMethod);
5444 }
5445 }
5446
5447 if (!legal) {
5448 ResourceMark rm(THREAD);
5449 assert(_class_name != NULL, "invariant");
5450 Exceptions::fthrow(
5451 THREAD_AND_LOCATION,
5452 vmSymbols::java_lang_ClassFormatError(),
5453 "Illegal method name \"%.*s\" in class %s", length, bytes,
5454 _class_name->as_C_string()
5455 );
5456 return;
5457 }
5458 }
5459
5460
5461 // Checks if signature is a legal field signature.
5462 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5463 const Symbol* signature,
5464 TRAPS) const {
5465 if (!_need_verify) { return; }
5466
5467 const char* const bytes = (const char* const)signature->bytes();
5468 const unsigned int length = signature->utf8_length();
5469 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5470
5471 if (p == NULL || (p - bytes) != (int)length) {
5472 throwIllegalSignature("Field", name, signature, CHECK);
5473 }
5474 }
5475
5476 // Checks if signature is a legal method signature.
5477 // Returns number of parameters
5478 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5479 const Symbol* signature,
5480 TRAPS) const {
5481 if (!_need_verify) {
5482 // make sure caller's args_size will be less than 0 even for non-static
5483 // method so it will be recomputed in compute_size_of_parameters().
5484 return -2;
5485 }
5486
5487 // Class initializers cannot have args for class format version >= 51.
5488 if (name == vmSymbols::class_initializer_name() &&
5489 signature != vmSymbols::void_method_signature() &&
5490 _major_version >= JAVA_7_VERSION) {
5491 throwIllegalSignature("Method", name, signature, CHECK_0);
5492 return 0;
5493 }
5494
5495 unsigned int args_size = 0;
5496 const char* p = (const char*)signature->bytes();
5497 unsigned int length = signature->utf8_length();
5498 const char* nextp;
5499
5500 // The first character must be a '('
5501 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5502 length--;
5503 // Skip over legal field signatures
5504 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5505 while ((length > 0) && (nextp != NULL)) {
5506 args_size++;
5507 if (p[0] == 'J' || p[0] == 'D') {
5508 args_size++;
5509 }
5510 length -= nextp - p;
5511 p = nextp;
5512 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5513 }
5514 // The first non-signature thing better be a ')'
5515 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5516 length--;
5517 if (name->utf8_length() > 0 && name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
5518 // All internal methods must return void
5519 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5520 return args_size;
5521 }
5522 } else {
5523 // Now we better just have a return value
5524 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5525 if (nextp && ((int)length == (nextp - p))) {
5526 return args_size;
5527 }
5528 }
5529 }
5530 }
5531 // Report error
5532 throwIllegalSignature("Method", name, signature, CHECK_0);
5533 return 0;
5534 }
5535
5536 int ClassFileParser::static_field_size() const {
5537 assert(_field_info != NULL, "invariant");
5538 return _field_info->static_field_size;
5539 }
5540
5541 int ClassFileParser::total_oop_map_count() const {
5542 assert(_field_info != NULL, "invariant");
5543 return _field_info->total_oop_map_count;
5544 }
5545
5546 jint ClassFileParser::layout_size() const {
5547 assert(_field_info != NULL, "invariant");
5548 return _field_info->instance_size;
5549 }
5550
5551 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5552 const Array<Method*>* methods) {
5553 assert(ik != NULL, "invariant");
5554 assert(methods != NULL, "invariant");
5555
5556 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5557 // (We used to do this lazily, but now we query it in Rewriter,
5558 // which is eagerly done for every method, so we might as well do it now,
5559 // when everything is fresh in memory.)
5560 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5561
5562 if (klass_id != vmSymbols::NO_SID) {
5563 for (int j = 0; j < methods->length(); ++j) {
5564 Method* method = methods->at(j);
5565 method->init_intrinsic_id();
5566
5567 if (CheckIntrinsics) {
5568 // Check if an intrinsic is defined for method 'method',
5569 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5570 if (method->intrinsic_id() != vmIntrinsics::_none &&
5571 !method->intrinsic_candidate()) {
5572 tty->print("Compiler intrinsic is defined for method [%s], "
5573 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5574 method->name_and_sig_as_C_string(),
5575 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5576 );
5577 tty->cr();
5578 DEBUG_ONLY(vm_exit(1));
5579 }
5580 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5581 // but there is no intrinsic available for it.
5582 if (method->intrinsic_candidate() &&
5583 method->intrinsic_id() == vmIntrinsics::_none) {
5584 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5585 "but no compiler intrinsic is defined for the method.%s",
5586 method->name_and_sig_as_C_string(),
5587 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5588 );
5589 tty->cr();
5590 DEBUG_ONLY(vm_exit(1));
5591 }
5592 }
5593 } // end for
5594
5595 #ifdef ASSERT
5596 if (CheckIntrinsics) {
5597 // Check for orphan methods in the current class. A method m
5598 // of a class C is orphan if an intrinsic is defined for method m,
5599 // but class C does not declare m.
5600 // The check is potentially expensive, therefore it is available
5601 // only in debug builds.
5602
5603 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5604 if (vmIntrinsics::_compiledLambdaForm == id) {
5605 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5606 // generated for the JVM from a LambdaForm and therefore no method
5607 // is defined for it.
5608 continue;
5609 }
5610
5611 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5612 // Check if the current class contains a method with the same
5613 // name, flags, signature.
5614 bool match = false;
5615 for (int j = 0; j < methods->length(); ++j) {
5616 const Method* method = methods->at(j);
5617 if (method->intrinsic_id() == id) {
5618 match = true;
5619 break;
5620 }
5621 }
5622
5623 if (!match) {
5624 char buf[1000];
5625 tty->print("Compiler intrinsic is defined for method [%s], "
5626 "but the method is not available in class [%s].%s",
5627 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5628 buf, sizeof(buf)),
5629 ik->name()->as_C_string(),
5630 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5631 );
5632 tty->cr();
5633 DEBUG_ONLY(vm_exit(1));
5634 }
5635 }
5636 } // end for
5637 } // CheckIntrinsics
5638 #endif // ASSERT
5639 }
5640 }
5641
5642 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5643 if (_klass != NULL) {
5644 return _klass;
5645 }
5646
5647 InstanceKlass* const ik =
5648 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5649
5650 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5651
5652 assert(_klass == ik, "invariant");
5653
5654
5655 if (ik->should_store_fingerprint()) {
5656 ik->store_fingerprint(_stream->compute_fingerprint());
5657 }
5658
5659 ik->set_has_passed_fingerprint_check(false);
5660 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5661 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5662 uint64_t fp = ik->has_stored_fingerprint() ? ik->get_stored_fingerprint() : _stream->compute_fingerprint();
5663 if (aot_fp != 0 && aot_fp == fp) {
5664 // This class matches with a class saved in an AOT library
5665 ik->set_has_passed_fingerprint_check(true);
5666 } else {
5667 ResourceMark rm;
5668 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5669 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5670 }
5671 }
5672
5673 return ik;
5674 }
5675
5676 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5677 assert(ik != NULL, "invariant");
5678
5679 // Set name and CLD before adding to CLD
5680 ik->set_class_loader_data(_loader_data);
5681 ik->set_name(_class_name);
5682
5683 // Add all classes to our internal class loader list here,
5684 // including classes in the bootstrap (NULL) class loader.
5685 const bool publicize = !is_internal();
5686
5687 _loader_data->add_class(ik, publicize);
5688
5689 set_klass_to_deallocate(ik);
5690
5691 assert(_field_info != NULL, "invariant");
5692 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5693 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5694 "sanity");
5695
5696 assert(ik->is_instance_klass(), "sanity");
5697 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5698
5699 // Fill in information already parsed
5700 ik->set_should_verify_class(_need_verify);
5701
5702 // Not yet: supers are done below to support the new subtype-checking fields
5703 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5704 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5705 assert(_fac != NULL, "invariant");
5706 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5707
5708 // this transfers ownership of a lot of arrays from
5709 // the parser onto the InstanceKlass*
5710 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5711
5712 // note that is not safe to use the fields in the parser from this point on
5713 assert(NULL == _cp, "invariant");
5714 assert(NULL == _fields, "invariant");
5715 assert(NULL == _methods, "invariant");
5716 assert(NULL == _inner_classes, "invariant");
5717 assert(NULL == _nest_members, "invariant");
5718 assert(NULL == _local_interfaces, "invariant");
5719 assert(NULL == _combined_annotations, "invariant");
5720 assert(NULL == _record_components, "invariant");
5721
5722 if (_has_final_method) {
5723 ik->set_has_final_method();
5724 }
5725
5726 ik->copy_method_ordering(_method_ordering, CHECK);
5727 // The InstanceKlass::_methods_jmethod_ids cache
5728 // is managed on the assumption that the initial cache
5729 // size is equal to the number of methods in the class. If
5730 // that changes, then InstanceKlass::idnum_can_increment()
5731 // has to be changed accordingly.
5732 ik->set_initial_method_idnum(ik->methods()->length());
5733
5734 ik->set_this_class_index(_this_class_index);
5735
5736 if (is_unsafe_anonymous()) {
5737 // _this_class_index is a CONSTANT_Class entry that refers to this
5738 // anonymous class itself. If this class needs to refer to its own methods or
5739 // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5740 // _this_class_index. However, because this class is anonymous (it's
5741 // not stored in SystemDictionary), _this_class_index cannot be resolved
5742 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5743 // Therefore, we must eagerly resolve _this_class_index now.
5744 ik->constants()->klass_at_put(_this_class_index, ik);
5745 }
5746
5747 ik->set_minor_version(_minor_version);
5748 ik->set_major_version(_major_version);
5749 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5750 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5751
5752 if (_unsafe_anonymous_host != NULL) {
5753 assert (ik->is_unsafe_anonymous(), "should be the same");
5754 ik->set_unsafe_anonymous_host(_unsafe_anonymous_host);
5755 }
5756
5757 // Set PackageEntry for this_klass
5758 oop cl = ik->class_loader();
5759 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5760 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5761 ik->set_package(cld, CHECK);
5762
5763 const Array<Method*>* const methods = ik->methods();
5764 assert(methods != NULL, "invariant");
5765 const int methods_len = methods->length();
5766
5767 check_methods_for_intrinsics(ik, methods);
5768
5769 // Fill in field values obtained by parse_classfile_attributes
5770 if (_parsed_annotations->has_any_annotations()) {
5771 _parsed_annotations->apply_to(ik);
5772 }
5773
5774 apply_parsed_class_attributes(ik);
5775
5776 // Miranda methods
5777 if ((_num_miranda_methods > 0) ||
5778 // if this class introduced new miranda methods or
5779 (_super_klass != NULL && _super_klass->has_miranda_methods())
5780 // super class exists and this class inherited miranda methods
5781 ) {
5782 ik->set_has_miranda_methods(); // then set a flag
5783 }
5784
5785 // Fill in information needed to compute superclasses.
5786 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5787 ik->set_transitive_interfaces(_transitive_interfaces);
5788 _transitive_interfaces = NULL;
5789
5790 // Initialize itable offset tables
5791 klassItable::setup_itable_offset_table(ik);
5792
5793 // Compute transitive closure of interfaces this class implements
5794 // Do final class setup
5795 fill_oop_maps(ik,
5796 _field_info->nonstatic_oop_map_count,
5797 _field_info->nonstatic_oop_offsets,
5798 _field_info->nonstatic_oop_counts);
5799
5800 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5801 set_precomputed_flags(ik);
5802
5803 // check if this class can access its super class
5804 check_super_class_access(ik, CHECK);
5805
5806 // check if this class can access its superinterfaces
5807 check_super_interface_access(ik, CHECK);
5808
5809 // check if this class overrides any final method
5810 check_final_method_override(ik, CHECK);
5811
5812 // reject static interface methods prior to Java 8
5813 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5814 check_illegal_static_method(ik, CHECK);
5815 }
5816
5817 // Obtain this_klass' module entry
5818 ModuleEntry* module_entry = ik->module();
5819 assert(module_entry != NULL, "module_entry should always be set");
5820
5821 // Obtain java.lang.Module
5822 Handle module_handle(THREAD, module_entry->module());
5823
5824 // Allocate mirror and initialize static fields
5825 // The create_mirror() call will also call compute_modifiers()
5826 java_lang_Class::create_mirror(ik,
5827 Handle(THREAD, _loader_data->class_loader()),
5828 module_handle,
5829 _protection_domain,
5830 CHECK);
5831
5832 assert(_all_mirandas != NULL, "invariant");
5833
5834 // Generate any default methods - default methods are public interface methods
5835 // that have a default implementation. This is new with Java 8.
5836 if (_has_nonstatic_concrete_methods) {
5837 DefaultMethods::generate_default_methods(ik,
5838 _all_mirandas,
5839 CHECK);
5840 }
5841
5842 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5843 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5844 !module_entry->has_default_read_edges()) {
5845 if (!module_entry->set_has_default_read_edges()) {
5846 // We won a potential race
5847 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5848 }
5849 }
5850
5851 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5852
5853 if (!is_internal()) {
5854 if (log_is_enabled(Info, class, load)) {
5855 ResourceMark rm;
5856 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5857 ik->print_class_load_logging(_loader_data, module_name, _stream);
5858 }
5859
5860 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5861 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5862 log_is_enabled(Info, class, preview)) {
5863 ResourceMark rm;
5864 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5865 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5866 }
5867
5868 if (log_is_enabled(Debug, class, resolve)) {
5869 ResourceMark rm;
5870 // print out the superclass.
5871 const char * from = ik->external_name();
5872 if (ik->java_super() != NULL) {
5873 log_debug(class, resolve)("%s %s (super)",
5874 from,
5875 ik->java_super()->external_name());
5876 }
5877 // print out each of the interface classes referred to by this class.
5878 const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5879 if (local_interfaces != NULL) {
5880 const int length = local_interfaces->length();
5881 for (int i = 0; i < length; i++) {
5882 const InstanceKlass* const k = local_interfaces->at(i);
5883 const char * to = k->external_name();
5884 log_debug(class, resolve)("%s %s (interface)", from, to);
5885 }
5886 }
5887 }
5888 }
5889
5890 JFR_ONLY(INIT_ID(ik);)
5891
5892 // If we reach here, all is well.
5893 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5894 // in order for it to not be destroyed in the ClassFileParser destructor.
5895 set_klass_to_deallocate(NULL);
5896
5897 // it's official
5898 set_klass(ik);
5899
5900 debug_only(ik->verify();)
5901 }
5902
5903 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5904 // Decrement the refcount in the old name, since we're clobbering it.
5905 _class_name->decrement_refcount();
5906
5907 _class_name = new_class_name;
5908 // Increment the refcount of the new name.
5909 // Now the ClassFileParser owns this name and will decrement in
5910 // the destructor.
5911 _class_name->increment_refcount();
5912 }
5913
5914
5915 // For an unsafe anonymous class that is in the unnamed package, move it to its host class's
5916 // package by prepending its host class's package name to its class name and setting
5917 // its _class_name field.
5918 void ClassFileParser::prepend_host_package_name(const InstanceKlass* unsafe_anonymous_host, TRAPS) {
5919 ResourceMark rm(THREAD);
5920 assert(strrchr(_class_name->as_C_string(), JVM_SIGNATURE_SLASH) == NULL,
5921 "Unsafe anonymous class should not be in a package");
5922 const char* host_pkg_name =
5923 ClassLoader::package_from_name(unsafe_anonymous_host->name()->as_C_string(), NULL);
5924
5925 if (host_pkg_name != NULL) {
5926 int host_pkg_len = (int)strlen(host_pkg_name);
5927 int class_name_len = _class_name->utf8_length();
5928 int symbol_len = host_pkg_len + 1 + class_name_len;
5929 char* new_anon_name = NEW_RESOURCE_ARRAY(char, symbol_len + 1);
5930 int n = os::snprintf(new_anon_name, symbol_len + 1, "%s/%.*s",
5931 host_pkg_name, class_name_len, _class_name->base());
5932 assert(n == symbol_len, "Unexpected number of characters in string");
5933
5934 // Decrement old _class_name to avoid leaking.
5935 _class_name->decrement_refcount();
5936
5937 // Create a symbol and update the anonymous class name.
5938 // The new class name is created with a refcount of one. When installed into the InstanceKlass,
5939 // it'll be two and when the ClassFileParser destructor runs, it'll go back to one and get deleted
5940 // when the class is unloaded.
5941 _class_name = SymbolTable::new_symbol(new_anon_name, symbol_len);
5942 }
5943 }
5944
5945 // If the host class and the anonymous class are in the same package then do
5946 // nothing. If the anonymous class is in the unnamed package then move it to its
5947 // host's package. If the classes are in different packages then throw an IAE
5948 // exception.
5949 void ClassFileParser::fix_unsafe_anonymous_class_name(TRAPS) {
5950 assert(_unsafe_anonymous_host != NULL, "Expected an unsafe anonymous class");
5951
5952 const jbyte* anon_last_slash = UTF8::strrchr((const jbyte*)_class_name->base(),
5953 _class_name->utf8_length(), JVM_SIGNATURE_SLASH);
5954 if (anon_last_slash == NULL) { // Unnamed package
5955 prepend_host_package_name(_unsafe_anonymous_host, CHECK);
5956 } else {
5957 if (!_unsafe_anonymous_host->is_same_class_package(_unsafe_anonymous_host->class_loader(), _class_name)) {
5958 ResourceMark rm(THREAD);
5959 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5960 err_msg("Host class %s and anonymous class %s are in different packages",
5961 _unsafe_anonymous_host->name()->as_C_string(), _class_name->as_C_string()));
5962 }
5963 }
5964 }
5965
5966 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5967 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5968 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5969 bool need_verify =
5970 // verifyAll
5971 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5972 // verifyRemote
5973 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5974 return !need_verify;
5975 }
5976
5977 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5978 Symbol* name,
5979 ClassLoaderData* loader_data,
5980 Handle protection_domain,
5981 const InstanceKlass* unsafe_anonymous_host,
5982 GrowableArray<Handle>* cp_patches,
5983 Publicity pub_level,
5984 TRAPS) :
5985 _stream(stream),
5986 _requested_name(name),
5987 _class_name(NULL),
5988 _loader_data(loader_data),
5989 _unsafe_anonymous_host(unsafe_anonymous_host),
5990 _cp_patches(cp_patches),
5991 _num_patched_klasses(0),
5992 _max_num_patched_klasses(0),
5993 _orig_cp_size(0),
5994 _first_patched_klass_resolved_index(0),
5995 _super_klass(),
5996 _cp(NULL),
5997 _fields(NULL),
5998 _methods(NULL),
5999 _inner_classes(NULL),
6000 _nest_members(NULL),
6001 _nest_host(0),
6002 _record_components(NULL),
6003 _local_interfaces(NULL),
6004 _transitive_interfaces(NULL),
6005 _combined_annotations(NULL),
6006 _class_annotations(NULL),
6007 _class_type_annotations(NULL),
6008 _fields_annotations(NULL),
6009 _fields_type_annotations(NULL),
6010 _klass(NULL),
6011 _klass_to_deallocate(NULL),
6012 _parsed_annotations(NULL),
6013 _fac(NULL),
6014 _field_info(NULL),
6015 _method_ordering(NULL),
6016 _all_mirandas(NULL),
6017 _vtable_size(0),
6018 _itable_size(0),
6019 _num_miranda_methods(0),
6020 _rt(REF_NONE),
6021 _protection_domain(protection_domain),
6022 _access_flags(),
6023 _pub_level(pub_level),
6024 _bad_constant_seen(0),
6025 _synthetic_flag(false),
6026 _sde_length(false),
6027 _sde_buffer(NULL),
6028 _sourcefile_index(0),
6029 _generic_signature_index(0),
6030 _major_version(0),
6031 _minor_version(0),
6032 _this_class_index(0),
6033 _super_class_index(0),
6034 _itfs_len(0),
6035 _java_fields_count(0),
6036 _need_verify(false),
6037 _relax_verify(false),
6038 _has_nonstatic_concrete_methods(false),
6039 _declares_nonstatic_concrete_methods(false),
6040 _has_final_method(false),
6041 _has_finalizer(false),
6042 _has_empty_finalizer(false),
6043 _has_vanilla_constructor(false),
6044 _max_bootstrap_specifier_index(-1) {
6045
6046 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
6047 _class_name->increment_refcount();
6048
6049 assert(THREAD->is_Java_thread(), "invariant");
6050 assert(_loader_data != NULL, "invariant");
6051 assert(stream != NULL, "invariant");
6052 assert(_stream != NULL, "invariant");
6053 assert(_stream->buffer() == _stream->current(), "invariant");
6054 assert(_class_name != NULL, "invariant");
6055 assert(0 == _access_flags.as_int(), "invariant");
6056
6057 // Figure out whether we can skip format checking (matching classic VM behavior)
6058 if (DumpSharedSpaces) {
6059 // verify == true means it's a 'remote' class (i.e., non-boot class)
6060 // Verification decision is based on BytecodeVerificationRemote flag
6061 // for those classes.
6062 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
6063 BytecodeVerificationLocal;
6064 }
6065 else {
6066 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
6067 stream->need_verify());
6068 }
6069 if (_cp_patches != NULL) {
6070 int len = _cp_patches->length();
6071 for (int i=0; i<len; i++) {
6072 if (has_cp_patch_at(i)) {
6073 Handle patch = cp_patch_at(i);
6074 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
6075 // We need to append the names of the patched classes to the end of the constant pool,
6076 // because a patched class may have a Utf8 name that's not already included in the
6077 // original constant pool. These class names are used when patch_constant_pool()
6078 // calls patch_class().
6079 //
6080 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
6081 // At this point, we don't know the tag for index i yet, because we haven't parsed the
6082 // constant pool. So we can only assume the worst -- every String is used to patch a Class.
6083 _max_num_patched_klasses++;
6084 }
6085 }
6086 }
6087 }
6088
6089 // synch back verification state to stream
6090 stream->set_verify(_need_verify);
6091
6092 // Check if verification needs to be relaxed for this class file
6093 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
6094 _relax_verify = relax_format_check_for(_loader_data);
6095
6096 parse_stream(stream, CHECK);
6097
6098 post_process_parsed_stream(stream, _cp, CHECK);
6099 }
6100
6101 void ClassFileParser::clear_class_metadata() {
6102 // metadata created before the instance klass is created. Must be
6103 // deallocated if classfile parsing returns an error.
6104 _cp = NULL;
6105 _fields = NULL;
6106 _methods = NULL;
6107 _inner_classes = NULL;
6108 _nest_members = NULL;
6109 _local_interfaces = NULL;
6110 _combined_annotations = NULL;
6111 _class_annotations = _class_type_annotations = NULL;
6112 _fields_annotations = _fields_type_annotations = NULL;
6113 _record_components = NULL;
6114 }
6115
6116 // Destructor to clean up
6117 ClassFileParser::~ClassFileParser() {
6118 _class_name->decrement_refcount();
6119
6120 if (_cp != NULL) {
6121 MetadataFactory::free_metadata(_loader_data, _cp);
6122 }
6123 if (_fields != NULL) {
6124 MetadataFactory::free_array<u2>(_loader_data, _fields);
6125 }
6126
6127 if (_methods != NULL) {
6128 // Free methods
6129 InstanceKlass::deallocate_methods(_loader_data, _methods);
6130 }
6131
6132 // beware of the Universe::empty_blah_array!!
6133 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
6134 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
6135 }
6136
6137 if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
6138 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
6139 }
6140
6141 if (_record_components != NULL) {
6142 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
6143 }
6144
6145 // Free interfaces
6146 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
6147 _local_interfaces, _transitive_interfaces);
6148
6149 if (_combined_annotations != NULL) {
6150 // After all annotations arrays have been created, they are installed into the
6151 // Annotations object that will be assigned to the InstanceKlass being created.
6152
6153 // Deallocate the Annotations object and the installed annotations arrays.
6154 _combined_annotations->deallocate_contents(_loader_data);
6155
6156 // If the _combined_annotations pointer is non-NULL,
6157 // then the other annotations fields should have been cleared.
6158 assert(_class_annotations == NULL, "Should have been cleared");
6159 assert(_class_type_annotations == NULL, "Should have been cleared");
6160 assert(_fields_annotations == NULL, "Should have been cleared");
6161 assert(_fields_type_annotations == NULL, "Should have been cleared");
6162 } else {
6163 // If the annotations arrays were not installed into the Annotations object,
6164 // then they have to be deallocated explicitly.
6165 MetadataFactory::free_array<u1>(_loader_data, _class_annotations);
6166 MetadataFactory::free_array<u1>(_loader_data, _class_type_annotations);
6167 Annotations::free_contents(_loader_data, _fields_annotations);
6168 Annotations::free_contents(_loader_data, _fields_type_annotations);
6169 }
6170
6171 clear_class_metadata();
6172 _transitive_interfaces = NULL;
6173
6174 // deallocate the klass if already created. Don't directly deallocate, but add
6175 // to the deallocate list so that the klass is removed from the CLD::_klasses list
6176 // at a safepoint.
6177 if (_klass_to_deallocate != NULL) {
6178 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6179 }
6180 }
6181
6182 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6183 TRAPS) {
6184
6185 assert(stream != NULL, "invariant");
6186 assert(_class_name != NULL, "invariant");
6187
6188 // BEGIN STREAM PARSING
6189 stream->guarantee_more(8, CHECK); // magic, major, minor
6190 // Magic value
6191 const u4 magic = stream->get_u4_fast();
6192 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6193 "Incompatible magic value %u in class file %s",
6194 magic, CHECK);
6195
6196 // Version numbers
6197 _minor_version = stream->get_u2_fast();
6198 _major_version = stream->get_u2_fast();
6199
6200 if (DumpSharedSpaces && _major_version < JAVA_6_VERSION) {
6201 ResourceMark rm;
6202 warning("Pre JDK 6 class not supported by CDS: %u.%u %s",
6203 _major_version, _minor_version, _class_name->as_C_string());
6204 Exceptions::fthrow(
6205 THREAD_AND_LOCATION,
6206 vmSymbols::java_lang_UnsupportedClassVersionError(),
6207 "Unsupported major.minor version for dump time %u.%u",
6208 _major_version,
6209 _minor_version);
6210 }
6211
6212 // Check version numbers - we check this even with verifier off
6213 verify_class_version(_major_version, _minor_version, _class_name, CHECK);
6214
6215 stream->guarantee_more(3, CHECK); // length, first cp tag
6216 u2 cp_size = stream->get_u2_fast();
6217
6218 guarantee_property(
6219 cp_size >= 1, "Illegal constant pool size %u in class file %s",
6220 cp_size, CHECK);
6221
6222 _orig_cp_size = cp_size;
6223 if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6224 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6225 }
6226 cp_size += _max_num_patched_klasses;
6227
6228 _cp = ConstantPool::allocate(_loader_data,
6229 cp_size,
6230 CHECK);
6231
6232 ConstantPool* const cp = _cp;
6233
6234 parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6235
6236 assert(cp_size == (const u2)cp->length(), "invariant");
6237
6238 // ACCESS FLAGS
6239 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
6240
6241 // Access flags
6242 jint flags;
6243 // JVM_ACC_MODULE is defined in JDK-9 and later.
6244 if (_major_version >= JAVA_9_VERSION) {
6245 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
6246 } else {
6247 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
6248 }
6249
6250 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6251 // Set abstract bit for old class files for backward compatibility
6252 flags |= JVM_ACC_ABSTRACT;
6253 }
6254
6255 verify_legal_class_modifiers(flags, CHECK);
6256
6257 short bad_constant = class_bad_constant_seen();
6258 if (bad_constant != 0) {
6259 // Do not throw CFE until after the access_flags are checked because if
6260 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6261 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6262 }
6263
6264 _access_flags.set_flags(flags);
6265
6266 // This class and superclass
6267 _this_class_index = stream->get_u2_fast();
6268 check_property(
6269 valid_cp_range(_this_class_index, cp_size) &&
6270 cp->tag_at(_this_class_index).is_unresolved_klass(),
6271 "Invalid this class index %u in constant pool in class file %s",
6272 _this_class_index, CHECK);
6273
6274 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6275 assert(class_name_in_cp != NULL, "class_name can't be null");
6276
6277 // Update _class_name to reflect the name in the constant pool
6278 update_class_name(class_name_in_cp);
6279
6280 // Don't need to check whether this class name is legal or not.
6281 // It has been checked when constant pool is parsed.
6282 // However, make sure it is not an array type.
6283 if (_need_verify) {
6284 guarantee_property(_class_name->char_at(0) != JVM_SIGNATURE_ARRAY,
6285 "Bad class name in class file %s",
6286 CHECK);
6287 }
6288
6289 // Checks if name in class file matches requested name
6290 if (_requested_name != NULL && _requested_name != _class_name) {
6291 ResourceMark rm(THREAD);
6292 Exceptions::fthrow(
6293 THREAD_AND_LOCATION,
6294 vmSymbols::java_lang_NoClassDefFoundError(),
6295 "%s (wrong name: %s)",
6296 _class_name->as_C_string(),
6297 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6298 );
6299 return;
6300 }
6301
6302 // if this is an anonymous class fix up its name if it's in the unnamed
6303 // package. Otherwise, throw IAE if it is in a different package than
6304 // its host class.
6305 if (_unsafe_anonymous_host != NULL) {
6306 fix_unsafe_anonymous_class_name(CHECK);
6307 }
6308
6309 // Verification prevents us from creating names with dots in them, this
6310 // asserts that that's the case.
6311 assert(is_internal_format(_class_name), "external class name format used internally");
6312
6313 if (!is_internal()) {
6314 LogTarget(Debug, class, preorder) lt;
6315 if (lt.is_enabled()){
6316 ResourceMark rm(THREAD);
6317 LogStream ls(lt);
6318 ls.print("%s", _class_name->as_klass_external_name());
6319 if (stream->source() != NULL) {
6320 ls.print(" source: %s", stream->source());
6321 }
6322 ls.cr();
6323 }
6324
6325 #if INCLUDE_CDS
6326 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6327 if (!ClassLoader::has_jrt_entry()) {
6328 warning("DumpLoadedClassList and CDS are not supported in exploded build");
6329 DumpLoadedClassList = NULL;
6330 } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6331 _unsafe_anonymous_host == NULL) {
6332 // Only dump the classes that can be stored into CDS archive.
6333 // Unsafe anonymous classes such as generated LambdaForm classes are also not included.
6334 oop class_loader = _loader_data->class_loader();
6335 ResourceMark rm(THREAD);
6336 bool skip = false;
6337 if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6338 // For the boot and platform class loaders, skip classes that are not found in the
6339 // java runtime image, such as those found in the --patch-module entries.
6340 // These classes can't be loaded from the archive during runtime.
6341 if (!stream->from_boot_loader_modules_image() && strncmp(stream->source(), "jrt:", 4) != 0) {
6342 skip = true;
6343 }
6344
6345 if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6346 // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6347 // as they can be loaded from the archive during runtime.
6348 skip = false;
6349 }
6350 }
6351 if (skip) {
6352 tty->print_cr("skip writing class %s from source %s to classlist file",
6353 _class_name->as_C_string(), stream->source());
6354 } else {
6355 classlist_file->print_cr("%s", _class_name->as_C_string());
6356 classlist_file->flush();
6357 }
6358 }
6359 }
6360 #endif
6361 }
6362
6363 // SUPERKLASS
6364 _super_class_index = stream->get_u2_fast();
6365 _super_klass = parse_super_class(cp,
6366 _super_class_index,
6367 _need_verify,
6368 CHECK);
6369
6370 // Interfaces
6371 _itfs_len = stream->get_u2_fast();
6372 parse_interfaces(stream,
6373 _itfs_len,
6374 cp,
6375 &_has_nonstatic_concrete_methods,
6376 CHECK);
6377
6378 assert(_local_interfaces != NULL, "invariant");
6379
6380 // Fields (offsets are filled in later)
6381 _fac = new FieldAllocationCount();
6382 parse_fields(stream,
6383 _access_flags.is_interface(),
6384 _fac,
6385 cp,
6386 cp_size,
6387 &_java_fields_count,
6388 CHECK);
6389
6390 assert(_fields != NULL, "invariant");
6391
6392 // Methods
6393 AccessFlags promoted_flags;
6394 parse_methods(stream,
6395 _access_flags.is_interface(),
6396 &promoted_flags,
6397 &_has_final_method,
6398 &_declares_nonstatic_concrete_methods,
6399 CHECK);
6400
6401 assert(_methods != NULL, "invariant");
6402
6403 // promote flags from parse_methods() to the klass' flags
6404 _access_flags.add_promoted_flags(promoted_flags.as_int());
6405
6406 if (_declares_nonstatic_concrete_methods) {
6407 _has_nonstatic_concrete_methods = true;
6408 }
6409
6410 // Additional attributes/annotations
6411 _parsed_annotations = new ClassAnnotationCollector();
6412 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6413
6414 assert(_inner_classes != NULL, "invariant");
6415
6416 // Finalize the Annotations metadata object,
6417 // now that all annotation arrays have been created.
6418 create_combined_annotations(CHECK);
6419
6420 // Make sure this is the end of class file stream
6421 guarantee_property(stream->at_eos(),
6422 "Extra bytes at the end of class file %s",
6423 CHECK);
6424
6425 // all bytes in stream read and parsed
6426 }
6427
6428 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6429 ConstantPool* cp,
6430 TRAPS) {
6431 assert(stream != NULL, "invariant");
6432 assert(stream->at_eos(), "invariant");
6433 assert(cp != NULL, "invariant");
6434 assert(_loader_data != NULL, "invariant");
6435
6436 if (_class_name == vmSymbols::java_lang_Object()) {
6437 check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6438 "java.lang.Object cannot implement an interface in class file %s",
6439 CHECK);
6440 }
6441 // We check super class after class file is parsed and format is checked
6442 if (_super_class_index > 0 && NULL ==_super_klass) {
6443 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6444 if (_access_flags.is_interface()) {
6445 // Before attempting to resolve the superclass, check for class format
6446 // errors not checked yet.
6447 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6448 "Interfaces must have java.lang.Object as superclass in class file %s",
6449 CHECK);
6450 }
6451 Handle loader(THREAD, _loader_data->class_loader());
6452 _super_klass = (const InstanceKlass*)
6453 SystemDictionary::resolve_super_or_fail(_class_name,
6454 super_class_name,
6455 loader,
6456 _protection_domain,
6457 true,
6458 CHECK);
6459 }
6460
6461 if (_super_klass != NULL) {
6462 if (_super_klass->has_nonstatic_concrete_methods()) {
6463 _has_nonstatic_concrete_methods = true;
6464 }
6465
6466 if (_super_klass->is_interface()) {
6467 ResourceMark rm(THREAD);
6468 Exceptions::fthrow(
6469 THREAD_AND_LOCATION,
6470 vmSymbols::java_lang_IncompatibleClassChangeError(),
6471 "class %s has interface %s as super class",
6472 _class_name->as_klass_external_name(),
6473 _super_klass->external_name()
6474 );
6475 return;
6476 }
6477 // Make sure super class is not final
6478 if (_super_klass->is_final()) {
6479 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6480 }
6481 }
6482
6483 // Compute the transitive list of all unique interfaces implemented by this class
6484 _transitive_interfaces =
6485 compute_transitive_interfaces(_super_klass,
6486 _local_interfaces,
6487 _loader_data,
6488 CHECK);
6489
6490 assert(_transitive_interfaces != NULL, "invariant");
6491
6492 // sort methods
6493 _method_ordering = sort_methods(_methods);
6494
6495 _all_mirandas = new GrowableArray<Method*>(20);
6496
6497 Handle loader(THREAD, _loader_data->class_loader());
6498 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6499 &_num_miranda_methods,
6500 _all_mirandas,
6501 _super_klass,
6502 _methods,
6503 _access_flags,
6504 _major_version,
6505 loader,
6506 _class_name,
6507 _local_interfaces,
6508 CHECK);
6509
6510 // Size of Java itable (in words)
6511 _itable_size = _access_flags.is_interface() ? 0 :
6512 klassItable::compute_itable_size(_transitive_interfaces);
6513
6514 assert(_fac != NULL, "invariant");
6515 assert(_parsed_annotations != NULL, "invariant");
6516
6517 _field_info = new FieldLayoutInfo();
6518 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6519
6520 // Compute reference typ
6521 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6522
6523 }
6524
6525 void ClassFileParser::set_klass(InstanceKlass* klass) {
6526
6527 #ifdef ASSERT
6528 if (klass != NULL) {
6529 assert(NULL == _klass, "leaking?");
6530 }
6531 #endif
6532
6533 _klass = klass;
6534 }
6535
6536 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6537
6538 #ifdef ASSERT
6539 if (klass != NULL) {
6540 assert(NULL == _klass_to_deallocate, "leaking?");
6541 }
6542 #endif
6543
6544 _klass_to_deallocate = klass;
6545 }
6546
6547 // Caller responsible for ResourceMark
6548 // clone stream with rewound position
6549 const ClassFileStream* ClassFileParser::clone_stream() const {
6550 assert(_stream != NULL, "invariant");
6551
6552 return _stream->clone();
6553 }
6554 // ----------------------------------------------------------------------------
6555 // debugging
6556
6557 #ifdef ASSERT
6558
6559 // return true if class_name contains no '.' (internal format is '/')
6560 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6561 if (class_name != NULL) {
6562 ResourceMark rm;
6563 char* name = class_name->as_C_string();
6564 return strchr(name, JVM_SIGNATURE_DOT) == NULL;
6565 } else {
6566 return true;
6567 }
6568 }
6569
6570 #endif