1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24 #include "precompiled.hpp"
25 #include "aot/aotLoader.hpp"
26 #include "classfile/classFileParser.hpp"
27 #include "classfile/classFileStream.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/defaultMethods.hpp"
31 #include "classfile/dictionary.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/moduleEntry.hpp"
34 #include "classfile/symbolTable.hpp"
35 #include "classfile/systemDictionary.hpp"
36 #include "classfile/verificationType.hpp"
37 #include "classfile/verifier.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "gc/shared/gcLocker.hpp"
40 #include "logging/log.hpp"
41 #include "memory/allocation.hpp"
42 #include "memory/metadataFactory.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "memory/universe.inline.hpp"
46 #include "oops/annotations.hpp"
47 #include "oops/fieldStreams.hpp"
48 #include "oops/instanceKlass.hpp"
49 #include "oops/instanceMirrorKlass.hpp"
50 #include "oops/klass.inline.hpp"
51 #include "oops/klassVtable.hpp"
52 #include "oops/metadata.hpp"
53 #include "oops/method.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "oops/symbol.hpp"
56 #include "prims/jvm.h"
57 #include "prims/jvmtiExport.hpp"
58 #include "prims/jvmtiThreadState.hpp"
59 #include "runtime/javaCalls.hpp"
60 #include "runtime/perfData.hpp"
61 #include "runtime/reflection.hpp"
62 #include "runtime/signature.hpp"
63 #include "runtime/timer.hpp"
64 #include "services/classLoadingService.hpp"
65 #include "services/threadService.hpp"
66 #include "trace/traceMacros.hpp"
67 #include "utilities/array.hpp"
68 #include "utilities/exceptions.hpp"
69 #include "utilities/globalDefinitions.hpp"
70 #include "utilities/macros.hpp"
71 #include "utilities/ostream.hpp"
72 #include "utilities/resourceHash.hpp"
73 #if INCLUDE_CDS
74 #include "classfile/systemDictionaryShared.hpp"
75 #endif
76
77 // We generally try to create the oops directly when parsing, rather than
78 // allocating temporary data structures and copying the bytes twice. A
79 // temporary area is only needed when parsing utf8 entries in the constant
80 // pool and when parsing line number tables.
81
82 // We add assert in debug mode when class format is not checked.
83
84 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
85 #define JAVA_MIN_SUPPORTED_VERSION 45
86 #define JAVA_MAX_SUPPORTED_VERSION 53
87 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
88
89 // Used for two backward compatibility reasons:
90 // - to check for new additions to the class file format in JDK1.5
91 // - to check for bug fixes in the format checker in JDK1.5
92 #define JAVA_1_5_VERSION 49
93
94 // Used for backward compatibility reasons:
95 // - to check for javac bug fixes that happened after 1.5
96 // - also used as the max version when running in jdk6
97 #define JAVA_6_VERSION 50
98
99 // Used for backward compatibility reasons:
100 // - to disallow argument and require ACC_STATIC for <clinit> methods
101 #define JAVA_7_VERSION 51
102
103 // Extension method support.
104 #define JAVA_8_VERSION 52
105
106 #define JAVA_9_VERSION 53
107
108 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
109 ConstantPool* cp,
110 const int length,
111 TRAPS) {
112 assert(stream != NULL, "invariant");
113 assert(cp != NULL, "invariant");
114
115 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
116 // this function (_current can be allocated in a register, with scalar
117 // replacement of aggregates). The _current pointer is copied back to
118 // stream() when this function returns. DON'T call another method within
119 // this method that uses stream().
120 const ClassFileStream cfs1 = *stream;
121 const ClassFileStream* const cfs = &cfs1;
122
123 assert(cfs->allocated_on_stack(), "should be local");
124 debug_only(const u1* const old_current = stream->current();)
125
126 // Used for batching symbol allocations.
127 const char* names[SymbolTable::symbol_alloc_batch_size];
128 int lengths[SymbolTable::symbol_alloc_batch_size];
129 int indices[SymbolTable::symbol_alloc_batch_size];
130 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
131 int names_count = 0;
132
133 // parsing Index 0 is unused
134 for (int index = 1; index < length; index++) {
135 // Each of the following case guarantees one more byte in the stream
136 // for the following tag or the access_flags following constant pool,
137 // so we don't need bounds-check for reading tag.
138 const u1 tag = cfs->get_u1_fast();
139 switch (tag) {
140 case JVM_CONSTANT_Class : {
141 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
142 const u2 name_index = cfs->get_u2_fast();
143 cp->klass_index_at_put(index, name_index);
144 break;
145 }
146 case JVM_CONSTANT_Fieldref: {
147 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
148 const u2 class_index = cfs->get_u2_fast();
149 const u2 name_and_type_index = cfs->get_u2_fast();
150 cp->field_at_put(index, class_index, name_and_type_index);
151 break;
152 }
153 case JVM_CONSTANT_Methodref: {
154 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
155 const u2 class_index = cfs->get_u2_fast();
156 const u2 name_and_type_index = cfs->get_u2_fast();
157 cp->method_at_put(index, class_index, name_and_type_index);
158 break;
159 }
160 case JVM_CONSTANT_InterfaceMethodref: {
161 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
162 const u2 class_index = cfs->get_u2_fast();
163 const u2 name_and_type_index = cfs->get_u2_fast();
164 cp->interface_method_at_put(index, class_index, name_and_type_index);
165 break;
166 }
167 case JVM_CONSTANT_String : {
168 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
169 const u2 string_index = cfs->get_u2_fast();
170 cp->string_index_at_put(index, string_index);
171 break;
172 }
173 case JVM_CONSTANT_MethodHandle :
174 case JVM_CONSTANT_MethodType: {
175 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
176 classfile_parse_error(
177 "Class file version does not support constant tag %u in class file %s",
178 tag, CHECK);
179 }
180 if (tag == JVM_CONSTANT_MethodHandle) {
181 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
182 const u1 ref_kind = cfs->get_u1_fast();
183 const u2 method_index = cfs->get_u2_fast();
184 cp->method_handle_index_at_put(index, ref_kind, method_index);
185 }
186 else if (tag == JVM_CONSTANT_MethodType) {
187 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
188 const u2 signature_index = cfs->get_u2_fast();
189 cp->method_type_index_at_put(index, signature_index);
190 }
191 else {
192 ShouldNotReachHere();
193 }
194 break;
195 }
196 case JVM_CONSTANT_InvokeDynamic : {
197 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
198 classfile_parse_error(
199 "Class file version does not support constant tag %u in class file %s",
200 tag, CHECK);
201 }
202 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
203 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
204 const u2 name_and_type_index = cfs->get_u2_fast();
205 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
206 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
207 }
208 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
209 break;
210 }
211 case JVM_CONSTANT_Integer: {
212 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
213 const u4 bytes = cfs->get_u4_fast();
214 cp->int_at_put(index, (jint)bytes);
215 break;
216 }
217 case JVM_CONSTANT_Float: {
218 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
219 const u4 bytes = cfs->get_u4_fast();
220 cp->float_at_put(index, *(jfloat*)&bytes);
221 break;
222 }
223 case JVM_CONSTANT_Long: {
224 // A mangled type might cause you to overrun allocated memory
225 guarantee_property(index + 1 < length,
226 "Invalid constant pool entry %u in class file %s",
227 index,
228 CHECK);
229 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
230 const u8 bytes = cfs->get_u8_fast();
231 cp->long_at_put(index, bytes);
232 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
233 break;
234 }
235 case JVM_CONSTANT_Double: {
236 // A mangled type might cause you to overrun allocated memory
237 guarantee_property(index+1 < length,
238 "Invalid constant pool entry %u in class file %s",
239 index,
240 CHECK);
241 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
242 const u8 bytes = cfs->get_u8_fast();
243 cp->double_at_put(index, *(jdouble*)&bytes);
244 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
245 break;
246 }
247 case JVM_CONSTANT_NameAndType: {
248 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
249 const u2 name_index = cfs->get_u2_fast();
250 const u2 signature_index = cfs->get_u2_fast();
251 cp->name_and_type_at_put(index, name_index, signature_index);
252 break;
253 }
254 case JVM_CONSTANT_Utf8 : {
255 cfs->guarantee_more(2, CHECK); // utf8_length
256 u2 utf8_length = cfs->get_u2_fast();
257 const u1* utf8_buffer = cfs->get_u1_buffer();
258 assert(utf8_buffer != NULL, "null utf8 buffer");
259 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
260 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
261 cfs->skip_u1_fast(utf8_length);
262
263 // Before storing the symbol, make sure it's legal
264 if (_need_verify) {
265 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
266 }
267
268 if (has_cp_patch_at(index)) {
269 Handle patch = clear_cp_patch_at(index);
270 guarantee_property(java_lang_String::is_instance(patch()),
271 "Illegal utf8 patch at %d in class file %s",
272 index,
273 CHECK);
274 const char* const str = java_lang_String::as_utf8_string(patch());
275 // (could use java_lang_String::as_symbol instead, but might as well batch them)
276 utf8_buffer = (const u1*) str;
277 utf8_length = (int) strlen(str);
278 }
279
280 unsigned int hash;
281 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
282 utf8_length,
283 hash);
284 if (result == NULL) {
285 names[names_count] = (const char*)utf8_buffer;
286 lengths[names_count] = utf8_length;
287 indices[names_count] = index;
288 hashValues[names_count++] = hash;
289 if (names_count == SymbolTable::symbol_alloc_batch_size) {
290 SymbolTable::new_symbols(_loader_data,
291 cp,
292 names_count,
293 names,
294 lengths,
295 indices,
296 hashValues,
297 CHECK);
298 names_count = 0;
299 }
300 } else {
301 cp->symbol_at_put(index, result);
302 }
303 break;
304 }
305 default: {
306 classfile_parse_error("Unknown constant tag %u in class file %s",
307 tag,
308 CHECK);
309 break;
310 }
311 } // end of switch(tag)
312 } // end of for
313
314 // Allocate the remaining symbols
315 if (names_count > 0) {
316 SymbolTable::new_symbols(_loader_data,
317 cp,
318 names_count,
319 names,
320 lengths,
321 indices,
322 hashValues,
323 CHECK);
324 }
325
326 // Copy _current pointer of local copy back to stream.
327 assert(stream->current() == old_current, "non-exclusive use of stream");
328 stream->set_current(cfs1.current());
329
330 }
331
332 static inline bool valid_cp_range(int index, int length) {
333 return (index > 0 && index < length);
334 }
335
336 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
337 assert(cp != NULL, "invariant");
338 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
339 return cp->symbol_at(index);
340 }
341 return NULL;
342 }
343
344 #ifdef ASSERT
345 PRAGMA_DIAG_PUSH
346 PRAGMA_FORMAT_NONLITERAL_IGNORED
347 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
348 ResourceMark rm(THREAD);
349 fatal(msg, _class_name->as_C_string());
350 }
351
352 void ClassFileParser::report_assert_property_failure(const char* msg,
353 int index,
354 TRAPS) const {
355 ResourceMark rm(THREAD);
356 fatal(msg, index, _class_name->as_C_string());
357 }
358 PRAGMA_DIAG_POP
359 #endif
360
361 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
362 ConstantPool* const cp,
363 const int length,
364 TRAPS) {
365 assert(cp != NULL, "invariant");
366 assert(stream != NULL, "invariant");
367
368 // parsing constant pool entries
369 parse_constant_pool_entries(stream, cp, length, CHECK);
370
371 int index = 1; // declared outside of loops for portability
372
373 // first verification pass - validate cross references
374 // and fixup class and string constants
375 for (index = 1; index < length; index++) { // Index 0 is unused
376 const jbyte tag = cp->tag_at(index).value();
377 switch (tag) {
378 case JVM_CONSTANT_Class: {
379 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
380 break;
381 }
382 case JVM_CONSTANT_Fieldref:
383 // fall through
384 case JVM_CONSTANT_Methodref:
385 // fall through
386 case JVM_CONSTANT_InterfaceMethodref: {
387 if (!_need_verify) break;
388 const int klass_ref_index = cp->klass_ref_index_at(index);
389 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
390 check_property(valid_klass_reference_at(klass_ref_index),
391 "Invalid constant pool index %u in class file %s",
392 klass_ref_index, CHECK);
393 check_property(valid_cp_range(name_and_type_ref_index, length) &&
394 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
395 "Invalid constant pool index %u in class file %s",
396 name_and_type_ref_index, CHECK);
397 break;
398 }
399 case JVM_CONSTANT_String: {
400 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
401 break;
402 }
403 case JVM_CONSTANT_Integer:
404 break;
405 case JVM_CONSTANT_Float:
406 break;
407 case JVM_CONSTANT_Long:
408 case JVM_CONSTANT_Double: {
409 index++;
410 check_property(
411 (index < length && cp->tag_at(index).is_invalid()),
412 "Improper constant pool long/double index %u in class file %s",
413 index, CHECK);
414 break;
415 }
416 case JVM_CONSTANT_NameAndType: {
417 if (!_need_verify) break;
418 const int name_ref_index = cp->name_ref_index_at(index);
419 const int signature_ref_index = cp->signature_ref_index_at(index);
420 check_property(valid_symbol_at(name_ref_index),
421 "Invalid constant pool index %u in class file %s",
422 name_ref_index, CHECK);
423 check_property(valid_symbol_at(signature_ref_index),
424 "Invalid constant pool index %u in class file %s",
425 signature_ref_index, CHECK);
426 break;
427 }
428 case JVM_CONSTANT_Utf8:
429 break;
430 case JVM_CONSTANT_UnresolvedClass: // fall-through
431 case JVM_CONSTANT_UnresolvedClassInError: {
432 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
433 break;
434 }
435 case JVM_CONSTANT_ClassIndex: {
436 const int class_index = cp->klass_index_at(index);
437 check_property(valid_symbol_at(class_index),
438 "Invalid constant pool index %u in class file %s",
439 class_index, CHECK);
440 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
441 break;
442 }
443 case JVM_CONSTANT_StringIndex: {
444 const int string_index = cp->string_index_at(index);
445 check_property(valid_symbol_at(string_index),
446 "Invalid constant pool index %u in class file %s",
447 string_index, CHECK);
448 Symbol* const sym = cp->symbol_at(string_index);
449 cp->unresolved_string_at_put(index, sym);
450 break;
451 }
452 case JVM_CONSTANT_MethodHandle: {
453 const int ref_index = cp->method_handle_index_at(index);
454 check_property(valid_cp_range(ref_index, length),
455 "Invalid constant pool index %u in class file %s",
456 ref_index, CHECK);
457 const constantTag tag = cp->tag_at(ref_index);
458 const int ref_kind = cp->method_handle_ref_kind_at(index);
459
460 switch (ref_kind) {
461 case JVM_REF_getField:
462 case JVM_REF_getStatic:
463 case JVM_REF_putField:
464 case JVM_REF_putStatic: {
465 check_property(
466 tag.is_field(),
467 "Invalid constant pool index %u in class file %s (not a field)",
468 ref_index, CHECK);
469 break;
470 }
471 case JVM_REF_invokeVirtual:
472 case JVM_REF_newInvokeSpecial: {
473 check_property(
474 tag.is_method(),
475 "Invalid constant pool index %u in class file %s (not a method)",
476 ref_index, CHECK);
477 break;
478 }
479 case JVM_REF_invokeStatic:
480 case JVM_REF_invokeSpecial: {
481 check_property(
482 tag.is_method() ||
483 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
484 "Invalid constant pool index %u in class file %s (not a method)",
485 ref_index, CHECK);
486 break;
487 }
488 case JVM_REF_invokeInterface: {
489 check_property(
490 tag.is_interface_method(),
491 "Invalid constant pool index %u in class file %s (not an interface method)",
492 ref_index, CHECK);
493 break;
494 }
495 default: {
496 classfile_parse_error(
497 "Bad method handle kind at constant pool index %u in class file %s",
498 index, CHECK);
499 }
500 } // switch(refkind)
501 // Keep the ref_index unchanged. It will be indirected at link-time.
502 break;
503 } // case MethodHandle
504 case JVM_CONSTANT_MethodType: {
505 const int ref_index = cp->method_type_index_at(index);
506 check_property(valid_symbol_at(ref_index),
507 "Invalid constant pool index %u in class file %s",
508 ref_index, CHECK);
509 break;
510 }
511 case JVM_CONSTANT_InvokeDynamic: {
512 const int name_and_type_ref_index =
513 cp->invoke_dynamic_name_and_type_ref_index_at(index);
514
515 check_property(valid_cp_range(name_and_type_ref_index, length) &&
516 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
517 "Invalid constant pool index %u in class file %s",
518 name_and_type_ref_index, CHECK);
519 // bootstrap specifier index must be checked later,
520 // when BootstrapMethods attr is available
521 break;
522 }
523 default: {
524 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
525 ShouldNotReachHere();
526 break;
527 }
528 } // switch(tag)
529 } // end of for
530
531 if (_cp_patches != NULL) {
532 // need to treat this_class specially...
533 int this_class_index;
534 {
535 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
536 const u1* const mark = stream->current();
537 stream->skip_u2_fast(1); // skip flags
538 this_class_index = stream->get_u2_fast();
539 stream->set_current(mark); // revert to mark
540 }
541
542 for (index = 1; index < length; index++) { // Index 0 is unused
543 if (has_cp_patch_at(index)) {
544 guarantee_property(index != this_class_index,
545 "Illegal constant pool patch to self at %d in class file %s",
546 index, CHECK);
547 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
548 }
549 }
550 }
551
552 if (!_need_verify) {
553 return;
554 }
555
556 // second verification pass - checks the strings are of the right format.
557 // but not yet to the other entries
558 for (index = 1; index < length; index++) {
559 const jbyte tag = cp->tag_at(index).value();
560 switch (tag) {
561 case JVM_CONSTANT_UnresolvedClass: {
562 const Symbol* const class_name = cp->klass_name_at(index);
563 // check the name, even if _cp_patches will overwrite it
564 verify_legal_class_name(class_name, CHECK);
565 break;
566 }
567 case JVM_CONSTANT_NameAndType: {
568 if (_need_verify) {
569 const int sig_index = cp->signature_ref_index_at(index);
570 const int name_index = cp->name_ref_index_at(index);
571 const Symbol* const name = cp->symbol_at(name_index);
572 const Symbol* const sig = cp->symbol_at(sig_index);
573 guarantee_property(sig->utf8_length() != 0,
574 "Illegal zero length constant pool entry at %d in class %s",
575 sig_index, CHECK);
576 guarantee_property(name->utf8_length() != 0,
577 "Illegal zero length constant pool entry at %d in class %s",
578 name_index, CHECK);
579
580 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
581 // Format check method name and signature
582 verify_legal_method_name(name, CHECK);
583 verify_legal_method_signature(name, sig, CHECK);
584 } else {
585 // Format check field name and signature
586 verify_legal_field_name(name, CHECK);
587 verify_legal_field_signature(name, sig, CHECK);
588 }
589 }
590 break;
591 }
592 case JVM_CONSTANT_InvokeDynamic:
593 case JVM_CONSTANT_Fieldref:
594 case JVM_CONSTANT_Methodref:
595 case JVM_CONSTANT_InterfaceMethodref: {
596 const int name_and_type_ref_index =
597 cp->name_and_type_ref_index_at(index);
598 // already verified to be utf8
599 const int name_ref_index =
600 cp->name_ref_index_at(name_and_type_ref_index);
601 // already verified to be utf8
602 const int signature_ref_index =
603 cp->signature_ref_index_at(name_and_type_ref_index);
604 const Symbol* const name = cp->symbol_at(name_ref_index);
605 const Symbol* const signature = cp->symbol_at(signature_ref_index);
606 if (tag == JVM_CONSTANT_Fieldref) {
607 if (_need_verify) {
608 // Field name and signature are verified above, when iterating NameAndType_info.
609 // Need only to be sure signature is non-zero length and the right type.
610 if (signature->utf8_length() == 0 ||
611 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
612 throwIllegalSignature("Field", name, signature, CHECK);
613 }
614 }
615 } else {
616 if (_need_verify) {
617 // Method name and signature are verified above, when iterating NameAndType_info.
618 // Need only to be sure signature is non-zero length and the right type.
619 if (signature->utf8_length() == 0 ||
620 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
621 throwIllegalSignature("Method", name, signature, CHECK);
622 }
623 }
624 // 4509014: If a class method name begins with '<', it must be "<init>"
625 const unsigned int name_len = name->utf8_length();
626 if (tag == JVM_CONSTANT_Methodref &&
627 name_len != 0 &&
628 name->byte_at(0) == '<' &&
629 name != vmSymbols::object_initializer_name()) {
630 classfile_parse_error(
631 "Bad method name at constant pool index %u in class file %s",
632 name_ref_index, CHECK);
633 }
634 }
635 break;
636 }
637 case JVM_CONSTANT_MethodHandle: {
638 const int ref_index = cp->method_handle_index_at(index);
639 const int ref_kind = cp->method_handle_ref_kind_at(index);
640 switch (ref_kind) {
641 case JVM_REF_invokeVirtual:
642 case JVM_REF_invokeStatic:
643 case JVM_REF_invokeSpecial:
644 case JVM_REF_newInvokeSpecial: {
645 const int name_and_type_ref_index =
646 cp->name_and_type_ref_index_at(ref_index);
647 const int name_ref_index =
648 cp->name_ref_index_at(name_and_type_ref_index);
649 const Symbol* const name = cp->symbol_at(name_ref_index);
650 if (ref_kind == JVM_REF_newInvokeSpecial) {
651 if (name != vmSymbols::object_initializer_name()) {
652 classfile_parse_error(
653 "Bad constructor name at constant pool index %u in class file %s",
654 name_ref_index, CHECK);
655 }
656 } else {
657 if (name == vmSymbols::object_initializer_name()) {
658 classfile_parse_error(
659 "Bad method name at constant pool index %u in class file %s",
660 name_ref_index, CHECK);
661 }
662 }
663 break;
664 }
665 // Other ref_kinds are already fully checked in previous pass.
666 } // switch(ref_kind)
667 break;
668 }
669 case JVM_CONSTANT_MethodType: {
670 const Symbol* const no_name = vmSymbols::type_name(); // place holder
671 const Symbol* const signature = cp->method_type_signature_at(index);
672 verify_legal_method_signature(no_name, signature, CHECK);
673 break;
674 }
675 case JVM_CONSTANT_Utf8: {
676 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
677 }
678 } // switch(tag)
679 } // end of for
680 }
681
682 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
683 int index,
684 Handle patch,
685 TRAPS) {
686 assert(cp != NULL, "invariant");
687
688 BasicType patch_type = T_VOID;
689
690 switch (cp->tag_at(index).value()) {
691
692 case JVM_CONSTANT_UnresolvedClass: {
693 // Patching a class means pre-resolving it.
694 // The name in the constant pool is ignored.
695 if (java_lang_Class::is_instance(patch())) {
696 guarantee_property(!java_lang_Class::is_primitive(patch()),
697 "Illegal class patch at %d in class file %s",
698 index, CHECK);
699 cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
700 } else {
701 guarantee_property(java_lang_String::is_instance(patch()),
702 "Illegal class patch at %d in class file %s",
703 index, CHECK);
704 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
705 cp->unresolved_klass_at_put(index, name);
706 }
707 break;
708 }
709
710 case JVM_CONSTANT_String: {
711 // skip this patch and don't clear it. Needs the oop array for resolved
712 // references to be created first.
713 return;
714 }
715 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
716 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
717 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
718 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
719 patch_prim:
720 {
721 jvalue value;
722 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
723 guarantee_property(value_type == patch_type,
724 "Illegal primitive patch at %d in class file %s",
725 index, CHECK);
726 switch (value_type) {
727 case T_INT: cp->int_at_put(index, value.i); break;
728 case T_FLOAT: cp->float_at_put(index, value.f); break;
729 case T_LONG: cp->long_at_put(index, value.j); break;
730 case T_DOUBLE: cp->double_at_put(index, value.d); break;
731 default: assert(false, "");
732 }
733 } // end patch_prim label
734 break;
735
736 default: {
737 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
738 guarantee_property(!has_cp_patch_at(index),
739 "Illegal unexpected patch at %d in class file %s",
740 index, CHECK);
741 return;
742 }
743 } // end of switch(tag)
744
745 // On fall-through, mark the patch as used.
746 clear_cp_patch_at(index);
747 }
748 class NameSigHash: public ResourceObj {
749 public:
750 const Symbol* _name; // name
751 const Symbol* _sig; // signature
752 NameSigHash* _next; // Next entry in hash table
753 };
754
755 static const int HASH_ROW_SIZE = 256;
756
757 static unsigned int hash(const Symbol* name, const Symbol* sig) {
758 unsigned int raw_hash = 0;
759 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
760 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
761
762 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
763 }
764
765
766 static void initialize_hashtable(NameSigHash** table) {
767 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
768 }
769 // Return false if the name/sig combination is found in table.
770 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
771 // The old format checker uses heap sort to find duplicates.
772 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
773 // of table since we don't expect Symbol*'s to move.
774 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
775 assert(name != NULL, "name in constant pool is NULL");
776
777 // First lookup for duplicates
778 int index = hash(name, sig);
779 NameSigHash* entry = table[index];
780 while (entry != NULL) {
781 if (entry->_name == name && entry->_sig == sig) {
782 return false;
783 }
784 entry = entry->_next;
785 }
786
787 // No duplicate is found, allocate a new entry and fill it.
788 entry = new NameSigHash();
789 entry->_name = name;
790 entry->_sig = sig;
791
792 // Insert into hash table
793 entry->_next = table[index];
794 table[index] = entry;
795
796 return true;
797 }
798
799 // Side-effects: populates the _local_interfaces field
800 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
801 const int itfs_len,
802 ConstantPool* const cp,
803 bool* const has_nonstatic_concrete_methods,
804 TRAPS) {
805 assert(stream != NULL, "invariant");
806 assert(cp != NULL, "invariant");
807 assert(has_nonstatic_concrete_methods != NULL, "invariant");
808
809 if (itfs_len == 0) {
810 _local_interfaces = Universe::the_empty_klass_array();
811 } else {
812 assert(itfs_len > 0, "only called for len>0");
813 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
814
815 int index;
816 for (index = 0; index < itfs_len; index++) {
817 const u2 interface_index = stream->get_u2(CHECK);
818 KlassHandle interf;
819 check_property(
820 valid_klass_reference_at(interface_index),
821 "Interface name has bad constant pool index %u in class file %s",
822 interface_index, CHECK);
823 if (cp->tag_at(interface_index).is_klass()) {
824 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
825 } else {
826 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
827
828 // Don't need to check legal name because it's checked when parsing constant pool.
829 // But need to make sure it's not an array type.
830 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
831 "Bad interface name in class file %s", CHECK);
832
833 // Call resolve_super so classcircularity is checked
834 const Klass* const k =
835 SystemDictionary::resolve_super_or_fail(_class_name,
836 unresolved_klass,
837 _loader_data->class_loader(),
838 _protection_domain,
839 false,
840 CHECK);
841 interf = KlassHandle(THREAD, k);
842 }
843
844 if (!interf()->is_interface()) {
845 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
846 "Implementing class");
847 }
848
849 if (InstanceKlass::cast(interf())->has_nonstatic_concrete_methods()) {
850 *has_nonstatic_concrete_methods = true;
851 }
852 _local_interfaces->at_put(index, interf());
853 }
854
855 if (!_need_verify || itfs_len <= 1) {
856 return;
857 }
858
859 // Check if there's any duplicates in interfaces
860 ResourceMark rm(THREAD);
861 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
862 NameSigHash*,
863 HASH_ROW_SIZE);
864 initialize_hashtable(interface_names);
865 bool dup = false;
866 {
867 debug_only(NoSafepointVerifier nsv;)
868 for (index = 0; index < itfs_len; index++) {
869 const Klass* const k = _local_interfaces->at(index);
870 const Symbol* const name = InstanceKlass::cast(k)->name();
871 // If no duplicates, add (name, NULL) in hashtable interface_names.
872 if (!put_after_lookup(name, NULL, interface_names)) {
873 dup = true;
874 break;
875 }
876 }
877 }
878 if (dup) {
879 classfile_parse_error("Duplicate interface name in class file %s", CHECK);
880 }
881 }
882 }
883
884 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
885 int constantvalue_index,
886 int signature_index,
887 TRAPS) const {
888 // Make sure the constant pool entry is of a type appropriate to this field
889 guarantee_property(
890 (constantvalue_index > 0 &&
891 constantvalue_index < cp->length()),
892 "Bad initial value index %u in ConstantValue attribute in class file %s",
893 constantvalue_index, CHECK);
894
895 const constantTag value_type = cp->tag_at(constantvalue_index);
896 switch(cp->basic_type_for_signature_at(signature_index)) {
897 case T_LONG: {
898 guarantee_property(value_type.is_long(),
899 "Inconsistent constant value type in class file %s",
900 CHECK);
901 break;
902 }
903 case T_FLOAT: {
904 guarantee_property(value_type.is_float(),
905 "Inconsistent constant value type in class file %s",
906 CHECK);
907 break;
908 }
909 case T_DOUBLE: {
910 guarantee_property(value_type.is_double(),
911 "Inconsistent constant value type in class file %s",
912 CHECK);
913 break;
914 }
915 case T_BYTE:
916 case T_CHAR:
917 case T_SHORT:
918 case T_BOOLEAN:
919 case T_INT: {
920 guarantee_property(value_type.is_int(),
921 "Inconsistent constant value type in class file %s",
922 CHECK);
923 break;
924 }
925 case T_OBJECT: {
926 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
927 && value_type.is_string()),
928 "Bad string initial value in class file %s",
929 CHECK);
930 break;
931 }
932 default: {
933 classfile_parse_error("Unable to set initial value %u in class file %s",
934 constantvalue_index,
935 CHECK);
936 }
937 }
938 }
939
940 class AnnotationCollector : public ResourceObj{
941 public:
942 enum Location { _in_field, _in_method, _in_class };
943 enum ID {
944 _unknown = 0,
945 _method_CallerSensitive,
946 _method_ForceInline,
947 _method_DontInline,
948 _method_InjectedProfile,
949 _method_LambdaForm_Compiled,
950 _method_LambdaForm_Hidden,
951 _method_HotSpotIntrinsicCandidate,
952 _jdk_internal_vm_annotation_Contended,
953 _field_Stable,
954 _jdk_internal_vm_annotation_ReservedStackAccess,
955 _annotation_LIMIT
956 };
957 const Location _location;
958 int _annotations_present;
959 u2 _contended_group;
960
961 AnnotationCollector(Location location)
962 : _location(location), _annotations_present(0)
963 {
964 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
965 }
966 // If this annotation name has an ID, report it (or _none).
967 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
968 // Set the annotation name:
969 void set_annotation(ID id) {
970 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
971 _annotations_present |= nth_bit((int)id);
972 }
973
974 void remove_annotation(ID id) {
975 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
976 _annotations_present &= ~nth_bit((int)id);
977 }
978
979 // Report if the annotation is present.
980 bool has_any_annotations() const { return _annotations_present != 0; }
981 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
982
983 void set_contended_group(u2 group) { _contended_group = group; }
984 u2 contended_group() const { return _contended_group; }
985
986 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
987
988 void set_stable(bool stable) { set_annotation(_field_Stable); }
989 bool is_stable() const { return has_annotation(_field_Stable); }
990 };
991
992 // This class also doubles as a holder for metadata cleanup.
993 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
994 private:
995 ClassLoaderData* _loader_data;
996 AnnotationArray* _field_annotations;
997 AnnotationArray* _field_type_annotations;
998 public:
999 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1000 AnnotationCollector(_in_field),
1001 _loader_data(loader_data),
1002 _field_annotations(NULL),
1003 _field_type_annotations(NULL) {}
1004 ~FieldAnnotationCollector();
1005 void apply_to(FieldInfo* f);
1006 AnnotationArray* field_annotations() { return _field_annotations; }
1007 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1008
1009 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1010 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1011 };
1012
1013 class MethodAnnotationCollector : public AnnotationCollector{
1014 public:
1015 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1016 void apply_to(methodHandle m);
1017 };
1018
1019 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1020 public:
1021 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1022 void apply_to(InstanceKlass* ik);
1023 };
1024
1025
1026 static int skip_annotation_value(const u1*, int, int); // fwd decl
1027
1028 // Skip an annotation. Return >=limit if there is any problem.
1029 static int skip_annotation(const u1* buffer, int limit, int index) {
1030 assert(buffer != NULL, "invariant");
1031 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1032 // value := switch (tag:u1) { ... }
1033 index += 2; // skip atype
1034 if ((index += 2) >= limit) return limit; // read nmem
1035 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1036 while (--nmem >= 0 && index < limit) {
1037 index += 2; // skip member
1038 index = skip_annotation_value(buffer, limit, index);
1039 }
1040 return index;
1041 }
1042
1043 // Skip an annotation value. Return >=limit if there is any problem.
1044 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1045 assert(buffer != NULL, "invariant");
1046
1047 // value := switch (tag:u1) {
1048 // case B, C, I, S, Z, D, F, J, c: con:u2;
1049 // case e: e_class:u2 e_name:u2;
1050 // case s: s_con:u2;
1051 // case [: do(nval:u2) {value};
1052 // case @: annotation;
1053 // case s: s_con:u2;
1054 // }
1055 if ((index += 1) >= limit) return limit; // read tag
1056 const u1 tag = buffer[index - 1];
1057 switch (tag) {
1058 case 'B':
1059 case 'C':
1060 case 'I':
1061 case 'S':
1062 case 'Z':
1063 case 'D':
1064 case 'F':
1065 case 'J':
1066 case 'c':
1067 case 's':
1068 index += 2; // skip con or s_con
1069 break;
1070 case 'e':
1071 index += 4; // skip e_class, e_name
1072 break;
1073 case '[':
1074 {
1075 if ((index += 2) >= limit) return limit; // read nval
1076 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1077 while (--nval >= 0 && index < limit) {
1078 index = skip_annotation_value(buffer, limit, index);
1079 }
1080 }
1081 break;
1082 case '@':
1083 index = skip_annotation(buffer, limit, index);
1084 break;
1085 default:
1086 return limit; // bad tag byte
1087 }
1088 return index;
1089 }
1090
1091 // Sift through annotations, looking for those significant to the VM:
1092 static void parse_annotations(const ConstantPool* const cp,
1093 const u1* buffer, int limit,
1094 AnnotationCollector* coll,
1095 ClassLoaderData* loader_data,
1096 TRAPS) {
1097
1098 assert(cp != NULL, "invariant");
1099 assert(buffer != NULL, "invariant");
1100 assert(coll != NULL, "invariant");
1101 assert(loader_data != NULL, "invariant");
1102
1103 // annotations := do(nann:u2) {annotation}
1104 int index = 0;
1105 if ((index += 2) >= limit) return; // read nann
1106 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1107 enum { // initial annotation layout
1108 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1109 count_off = 2, // u2 such as 1 (one value)
1110 member_off = 4, // utf8 such as 'value'
1111 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1112 e_tag_val = 'e',
1113 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1114 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1115 e_size = 11, // end of 'e' annotation
1116 c_tag_val = 'c', // payload is type
1117 c_con_off = 7, // utf8 payload, such as 'I'
1118 c_size = 9, // end of 'c' annotation
1119 s_tag_val = 's', // payload is String
1120 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1121 s_size = 9,
1122 min_size = 6 // smallest possible size (zero members)
1123 };
1124 while ((--nann) >= 0 && (index - 2 + min_size <= limit)) {
1125 int index0 = index;
1126 index = skip_annotation(buffer, limit, index);
1127 const u1* const abase = buffer + index0;
1128 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1129 const int count = Bytes::get_Java_u2((address)abase + count_off);
1130 const Symbol* const aname = check_symbol_at(cp, atype);
1131 if (aname == NULL) break; // invalid annotation name
1132 const Symbol* member = NULL;
1133 if (count >= 1) {
1134 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1135 member = check_symbol_at(cp, member_index);
1136 if (member == NULL) break; // invalid member name
1137 }
1138
1139 // Here is where parsing particular annotations will take place.
1140 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1141 if (AnnotationCollector::_unknown == id) continue;
1142 coll->set_annotation(id);
1143
1144 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1145 // @Contended can optionally specify the contention group.
1146 //
1147 // Contended group defines the equivalence class over the fields:
1148 // the fields within the same contended group are not treated distinct.
1149 // The only exception is default group, which does not incur the
1150 // equivalence. Naturally, contention group for classes is meaningless.
1151 //
1152 // While the contention group is specified as String, annotation
1153 // values are already interned, and we might as well use the constant
1154 // pool index as the group tag.
1155 //
1156 u2 group_index = 0; // default contended group
1157 if (count == 1
1158 && s_size == (index - index0) // match size
1159 && s_tag_val == *(abase + tag_off)
1160 && member == vmSymbols::value_name()) {
1161 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1162 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1163 group_index = 0; // default contended group
1164 }
1165 }
1166 coll->set_contended_group(group_index);
1167 }
1168 }
1169 }
1170
1171
1172 // Parse attributes for a field.
1173 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1174 u2 attributes_count,
1175 bool is_static, u2 signature_index,
1176 u2* const constantvalue_index_addr,
1177 bool* const is_synthetic_addr,
1178 u2* const generic_signature_index_addr,
1179 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1180 TRAPS) {
1181 assert(cfs != NULL, "invariant");
1182 assert(constantvalue_index_addr != NULL, "invariant");
1183 assert(is_synthetic_addr != NULL, "invariant");
1184 assert(generic_signature_index_addr != NULL, "invariant");
1185 assert(parsed_annotations != NULL, "invariant");
1186 assert(attributes_count > 0, "attributes_count should be greater than 0");
1187
1188 u2 constantvalue_index = 0;
1189 u2 generic_signature_index = 0;
1190 bool is_synthetic = false;
1191 const u1* runtime_visible_annotations = NULL;
1192 int runtime_visible_annotations_length = 0;
1193 const u1* runtime_invisible_annotations = NULL;
1194 int runtime_invisible_annotations_length = 0;
1195 const u1* runtime_visible_type_annotations = NULL;
1196 int runtime_visible_type_annotations_length = 0;
1197 const u1* runtime_invisible_type_annotations = NULL;
1198 int runtime_invisible_type_annotations_length = 0;
1199 bool runtime_invisible_annotations_exists = false;
1200 bool runtime_invisible_type_annotations_exists = false;
1201 const ConstantPool* const cp = _cp;
1202
1203 while (attributes_count--) {
1204 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1205 const u2 attribute_name_index = cfs->get_u2_fast();
1206 const u4 attribute_length = cfs->get_u4_fast();
1207 check_property(valid_symbol_at(attribute_name_index),
1208 "Invalid field attribute index %u in class file %s",
1209 attribute_name_index,
1210 CHECK);
1211
1212 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1213 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1214 // ignore if non-static
1215 if (constantvalue_index != 0) {
1216 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1217 }
1218 check_property(
1219 attribute_length == 2,
1220 "Invalid ConstantValue field attribute length %u in class file %s",
1221 attribute_length, CHECK);
1222
1223 constantvalue_index = cfs->get_u2(CHECK);
1224 if (_need_verify) {
1225 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1226 }
1227 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1228 if (attribute_length != 0) {
1229 classfile_parse_error(
1230 "Invalid Synthetic field attribute length %u in class file %s",
1231 attribute_length, CHECK);
1232 }
1233 is_synthetic = true;
1234 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1235 if (attribute_length != 0) {
1236 classfile_parse_error(
1237 "Invalid Deprecated field attribute length %u in class file %s",
1238 attribute_length, CHECK);
1239 }
1240 } else if (_major_version >= JAVA_1_5_VERSION) {
1241 if (attribute_name == vmSymbols::tag_signature()) {
1242 if (attribute_length != 2) {
1243 classfile_parse_error(
1244 "Wrong size %u for field's Signature attribute in class file %s",
1245 attribute_length, CHECK);
1246 }
1247 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1248 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1249 if (runtime_visible_annotations != NULL) {
1250 classfile_parse_error(
1251 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1252 }
1253 runtime_visible_annotations_length = attribute_length;
1254 runtime_visible_annotations = cfs->get_u1_buffer();
1255 assert(runtime_visible_annotations != NULL, "null visible annotations");
1256 parse_annotations(cp,
1257 runtime_visible_annotations,
1258 runtime_visible_annotations_length,
1259 parsed_annotations,
1260 _loader_data,
1261 CHECK);
1262 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
1263 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1264 if (runtime_invisible_annotations_exists) {
1265 classfile_parse_error(
1266 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1267 }
1268 runtime_invisible_annotations_exists = true;
1269 if (PreserveAllAnnotations) {
1270 runtime_invisible_annotations_length = attribute_length;
1271 runtime_invisible_annotations = cfs->get_u1_buffer();
1272 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1273 }
1274 cfs->skip_u1(attribute_length, CHECK);
1275 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1276 if (runtime_visible_type_annotations != NULL) {
1277 classfile_parse_error(
1278 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1279 }
1280 runtime_visible_type_annotations_length = attribute_length;
1281 runtime_visible_type_annotations = cfs->get_u1_buffer();
1282 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1283 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1284 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1285 if (runtime_invisible_type_annotations_exists) {
1286 classfile_parse_error(
1287 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1288 } else {
1289 runtime_invisible_type_annotations_exists = true;
1290 }
1291 if (PreserveAllAnnotations) {
1292 runtime_invisible_type_annotations_length = attribute_length;
1293 runtime_invisible_type_annotations = cfs->get_u1_buffer();
1294 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1295 }
1296 cfs->skip_u1(attribute_length, CHECK);
1297 } else {
1298 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1299 }
1300 } else {
1301 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1302 }
1303 }
1304
1305 *constantvalue_index_addr = constantvalue_index;
1306 *is_synthetic_addr = is_synthetic;
1307 *generic_signature_index_addr = generic_signature_index;
1308 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1309 runtime_visible_annotations_length,
1310 runtime_invisible_annotations,
1311 runtime_invisible_annotations_length,
1312 CHECK);
1313 parsed_annotations->set_field_annotations(a);
1314 a = assemble_annotations(runtime_visible_type_annotations,
1315 runtime_visible_type_annotations_length,
1316 runtime_invisible_type_annotations,
1317 runtime_invisible_type_annotations_length,
1318 CHECK);
1319 parsed_annotations->set_field_type_annotations(a);
1320 return;
1321 }
1322
1323
1324 // Field allocation types. Used for computing field offsets.
1325
1326 enum FieldAllocationType {
1327 STATIC_OOP, // Oops
1328 STATIC_BYTE, // Boolean, Byte, char
1329 STATIC_SHORT, // shorts
1330 STATIC_WORD, // ints
1331 STATIC_DOUBLE, // aligned long or double
1332 NONSTATIC_OOP,
1333 NONSTATIC_BYTE,
1334 NONSTATIC_SHORT,
1335 NONSTATIC_WORD,
1336 NONSTATIC_DOUBLE,
1337 MAX_FIELD_ALLOCATION_TYPE,
1338 BAD_ALLOCATION_TYPE = -1
1339 };
1340
1341 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1342 BAD_ALLOCATION_TYPE, // 0
1343 BAD_ALLOCATION_TYPE, // 1
1344 BAD_ALLOCATION_TYPE, // 2
1345 BAD_ALLOCATION_TYPE, // 3
1346 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1347 NONSTATIC_SHORT, // T_CHAR = 5,
1348 NONSTATIC_WORD, // T_FLOAT = 6,
1349 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1350 NONSTATIC_BYTE, // T_BYTE = 8,
1351 NONSTATIC_SHORT, // T_SHORT = 9,
1352 NONSTATIC_WORD, // T_INT = 10,
1353 NONSTATIC_DOUBLE, // T_LONG = 11,
1354 NONSTATIC_OOP, // T_OBJECT = 12,
1355 NONSTATIC_OOP, // T_ARRAY = 13,
1356 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1357 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1358 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1359 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1360 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1361 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1362 BAD_ALLOCATION_TYPE, // 0
1363 BAD_ALLOCATION_TYPE, // 1
1364 BAD_ALLOCATION_TYPE, // 2
1365 BAD_ALLOCATION_TYPE, // 3
1366 STATIC_BYTE , // T_BOOLEAN = 4,
1367 STATIC_SHORT, // T_CHAR = 5,
1368 STATIC_WORD, // T_FLOAT = 6,
1369 STATIC_DOUBLE, // T_DOUBLE = 7,
1370 STATIC_BYTE, // T_BYTE = 8,
1371 STATIC_SHORT, // T_SHORT = 9,
1372 STATIC_WORD, // T_INT = 10,
1373 STATIC_DOUBLE, // T_LONG = 11,
1374 STATIC_OOP, // T_OBJECT = 12,
1375 STATIC_OOP, // T_ARRAY = 13,
1376 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1377 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1378 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1379 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1380 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1381 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1382 };
1383
1384 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1385 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1386 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1387 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1388 return result;
1389 }
1390
1391 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1392 public:
1393 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1394
1395 FieldAllocationCount() {
1396 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1397 count[i] = 0;
1398 }
1399 }
1400
1401 FieldAllocationType update(bool is_static, BasicType type) {
1402 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1403 if (atype != BAD_ALLOCATION_TYPE) {
1404 // Make sure there is no overflow with injected fields.
1405 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1406 count[atype]++;
1407 }
1408 return atype;
1409 }
1410 };
1411
1412 // Side-effects: populates the _fields, _fields_annotations,
1413 // _fields_type_annotations fields
1414 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1415 bool is_interface,
1416 FieldAllocationCount* const fac,
1417 ConstantPool* cp,
1418 const int cp_size,
1419 u2* const java_fields_count_ptr,
1420 TRAPS) {
1421
1422 assert(cfs != NULL, "invariant");
1423 assert(fac != NULL, "invariant");
1424 assert(cp != NULL, "invariant");
1425 assert(java_fields_count_ptr != NULL, "invariant");
1426
1427 assert(NULL == _fields, "invariant");
1428 assert(NULL == _fields_annotations, "invariant");
1429 assert(NULL == _fields_type_annotations, "invariant");
1430
1431 cfs->guarantee_more(2, CHECK); // length
1432 const u2 length = cfs->get_u2_fast();
1433 *java_fields_count_ptr = length;
1434
1435 int num_injected = 0;
1436 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1437 &num_injected);
1438 const int total_fields = length + num_injected;
1439
1440 // The field array starts with tuples of shorts
1441 // [access, name index, sig index, initial value index, byte offset].
1442 // A generic signature slot only exists for field with generic
1443 // signature attribute. And the access flag is set with
1444 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1445 // signature slots are at the end of the field array and after all
1446 // other fields data.
1447 //
1448 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1449 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1450 // ...
1451 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1452 // [generic signature index]
1453 // [generic signature index]
1454 // ...
1455 //
1456 // Allocate a temporary resource array for field data. For each field,
1457 // a slot is reserved in the temporary array for the generic signature
1458 // index. After parsing all fields, the data are copied to a permanent
1459 // array and any unused slots will be discarded.
1460 ResourceMark rm(THREAD);
1461 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1462 u2,
1463 total_fields * (FieldInfo::field_slots + 1));
1464
1465 // The generic signature slots start after all other fields' data.
1466 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1467 int num_generic_signature = 0;
1468 for (int n = 0; n < length; n++) {
1469 // access_flags, name_index, descriptor_index, attributes_count
1470 cfs->guarantee_more(8, CHECK);
1471
1472 AccessFlags access_flags;
1473 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1474 verify_legal_field_modifiers(flags, is_interface, CHECK);
1475 access_flags.set_flags(flags);
1476
1477 const u2 name_index = cfs->get_u2_fast();
1478 check_property(valid_symbol_at(name_index),
1479 "Invalid constant pool index %u for field name in class file %s",
1480 name_index, CHECK);
1481 const Symbol* const name = cp->symbol_at(name_index);
1482 verify_legal_field_name(name, CHECK);
1483
1484 const u2 signature_index = cfs->get_u2_fast();
1485 check_property(valid_symbol_at(signature_index),
1486 "Invalid constant pool index %u for field signature in class file %s",
1487 signature_index, CHECK);
1488 const Symbol* const sig = cp->symbol_at(signature_index);
1489 verify_legal_field_signature(name, sig, CHECK);
1490
1491 u2 constantvalue_index = 0;
1492 bool is_synthetic = false;
1493 u2 generic_signature_index = 0;
1494 const bool is_static = access_flags.is_static();
1495 FieldAnnotationCollector parsed_annotations(_loader_data);
1496
1497 const u2 attributes_count = cfs->get_u2_fast();
1498 if (attributes_count > 0) {
1499 parse_field_attributes(cfs,
1500 attributes_count,
1501 is_static,
1502 signature_index,
1503 &constantvalue_index,
1504 &is_synthetic,
1505 &generic_signature_index,
1506 &parsed_annotations,
1507 CHECK);
1508
1509 if (parsed_annotations.field_annotations() != NULL) {
1510 if (_fields_annotations == NULL) {
1511 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1512 _loader_data, length, NULL,
1513 CHECK);
1514 }
1515 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1516 parsed_annotations.set_field_annotations(NULL);
1517 }
1518 if (parsed_annotations.field_type_annotations() != NULL) {
1519 if (_fields_type_annotations == NULL) {
1520 _fields_type_annotations =
1521 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1522 length,
1523 NULL,
1524 CHECK);
1525 }
1526 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1527 parsed_annotations.set_field_type_annotations(NULL);
1528 }
1529
1530 if (is_synthetic) {
1531 access_flags.set_is_synthetic();
1532 }
1533 if (generic_signature_index != 0) {
1534 access_flags.set_field_has_generic_signature();
1535 fa[generic_signature_slot] = generic_signature_index;
1536 generic_signature_slot ++;
1537 num_generic_signature ++;
1538 }
1539 }
1540
1541 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1542 field->initialize(access_flags.as_short(),
1543 name_index,
1544 signature_index,
1545 constantvalue_index);
1546 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1547
1548 // Remember how many oops we encountered and compute allocation type
1549 const FieldAllocationType atype = fac->update(is_static, type);
1550 field->set_allocation_type(atype);
1551
1552 // After field is initialized with type, we can augment it with aux info
1553 if (parsed_annotations.has_any_annotations())
1554 parsed_annotations.apply_to(field);
1555 }
1556
1557 int index = length;
1558 if (num_injected != 0) {
1559 for (int n = 0; n < num_injected; n++) {
1560 // Check for duplicates
1561 if (injected[n].may_be_java) {
1562 const Symbol* const name = injected[n].name();
1563 const Symbol* const signature = injected[n].signature();
1564 bool duplicate = false;
1565 for (int i = 0; i < length; i++) {
1566 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1567 if (name == cp->symbol_at(f->name_index()) &&
1568 signature == cp->symbol_at(f->signature_index())) {
1569 // Symbol is desclared in Java so skip this one
1570 duplicate = true;
1571 break;
1572 }
1573 }
1574 if (duplicate) {
1575 // These will be removed from the field array at the end
1576 continue;
1577 }
1578 }
1579
1580 // Injected field
1581 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1582 field->initialize(JVM_ACC_FIELD_INTERNAL,
1583 injected[n].name_index,
1584 injected[n].signature_index,
1585 0);
1586
1587 const BasicType type = FieldType::basic_type(injected[n].signature());
1588
1589 // Remember how many oops we encountered and compute allocation type
1590 const FieldAllocationType atype = fac->update(false, type);
1591 field->set_allocation_type(atype);
1592 index++;
1593 }
1594 }
1595
1596 assert(NULL == _fields, "invariant");
1597
1598 _fields =
1599 MetadataFactory::new_array<u2>(_loader_data,
1600 index * FieldInfo::field_slots + num_generic_signature,
1601 CHECK);
1602 // Sometimes injected fields already exist in the Java source so
1603 // the fields array could be too long. In that case the
1604 // fields array is trimed. Also unused slots that were reserved
1605 // for generic signature indexes are discarded.
1606 {
1607 int i = 0;
1608 for (; i < index * FieldInfo::field_slots; i++) {
1609 _fields->at_put(i, fa[i]);
1610 }
1611 for (int j = total_fields * FieldInfo::field_slots;
1612 j < generic_signature_slot; j++) {
1613 _fields->at_put(i++, fa[j]);
1614 }
1615 assert(_fields->length() == i, "");
1616 }
1617
1618 if (_need_verify && length > 1) {
1619 // Check duplicated fields
1620 ResourceMark rm(THREAD);
1621 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1622 THREAD, NameSigHash*, HASH_ROW_SIZE);
1623 initialize_hashtable(names_and_sigs);
1624 bool dup = false;
1625 {
1626 debug_only(NoSafepointVerifier nsv;)
1627 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1628 const Symbol* const name = fs.name();
1629 const Symbol* const sig = fs.signature();
1630 // If no duplicates, add name/signature in hashtable names_and_sigs.
1631 if (!put_after_lookup(name, sig, names_and_sigs)) {
1632 dup = true;
1633 break;
1634 }
1635 }
1636 }
1637 if (dup) {
1638 classfile_parse_error("Duplicate field name&signature in class file %s",
1639 CHECK);
1640 }
1641 }
1642 }
1643
1644
1645 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) {
1646 while (length-- > 0) {
1647 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1648 }
1649 }
1650
1651 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1652 u4 code_length,
1653 u4 exception_table_length,
1654 TRAPS) {
1655 assert(cfs != NULL, "invariant");
1656
1657 const u2* const exception_table_start = cfs->get_u2_buffer();
1658 assert(exception_table_start != NULL, "null exception table");
1659
1660 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1661 // end_pc,
1662 // handler_pc,
1663 // catch_type_index
1664
1665 // Will check legal target after parsing code array in verifier.
1666 if (_need_verify) {
1667 for (unsigned int i = 0; i < exception_table_length; i++) {
1668 const u2 start_pc = cfs->get_u2_fast();
1669 const u2 end_pc = cfs->get_u2_fast();
1670 const u2 handler_pc = cfs->get_u2_fast();
1671 const u2 catch_type_index = cfs->get_u2_fast();
1672 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1673 "Illegal exception table range in class file %s",
1674 CHECK_NULL);
1675 guarantee_property(handler_pc < code_length,
1676 "Illegal exception table handler in class file %s",
1677 CHECK_NULL);
1678 if (catch_type_index != 0) {
1679 guarantee_property(valid_klass_reference_at(catch_type_index),
1680 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1681 }
1682 }
1683 } else {
1684 cfs->skip_u2_fast(exception_table_length * 4);
1685 }
1686 return exception_table_start;
1687 }
1688
1689 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1690 u4 code_length,
1691 CompressedLineNumberWriteStream**const write_stream,
1692 TRAPS) {
1693
1694 const ClassFileStream* const cfs = _stream;
1695 unsigned int num_entries = cfs->get_u2(CHECK);
1696
1697 // Each entry is a u2 start_pc, and a u2 line_number
1698 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1699
1700 // Verify line number attribute and table length
1701 check_property(
1702 code_attribute_length == sizeof(u2) + length_in_bytes,
1703 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1704
1705 cfs->guarantee_more(length_in_bytes, CHECK);
1706
1707 if ((*write_stream) == NULL) {
1708 if (length_in_bytes > fixed_buffer_size) {
1709 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1710 } else {
1711 (*write_stream) = new CompressedLineNumberWriteStream(
1712 _linenumbertable_buffer, fixed_buffer_size);
1713 }
1714 }
1715
1716 while (num_entries-- > 0) {
1717 const u2 bci = cfs->get_u2_fast(); // start_pc
1718 const u2 line = cfs->get_u2_fast(); // line_number
1719 guarantee_property(bci < code_length,
1720 "Invalid pc in LineNumberTable in class file %s", CHECK);
1721 (*write_stream)->write_pair(bci, line);
1722 }
1723 }
1724
1725
1726 class LVT_Hash : public AllStatic {
1727 public:
1728
1729 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1730 /*
1731 * 3-tuple start_bci/length/slot has to be unique key,
1732 * so the following comparison seems to be redundant:
1733 * && elem->name_cp_index == entry->_elem->name_cp_index
1734 */
1735 return (e0.start_bci == e1.start_bci &&
1736 e0.length == e1.length &&
1737 e0.name_cp_index == e1.name_cp_index &&
1738 e0.slot == e1.slot);
1739 }
1740
1741 static unsigned int hash(LocalVariableTableElement const& e0) {
1742 unsigned int raw_hash = e0.start_bci;
1743
1744 raw_hash = e0.length + raw_hash * 37;
1745 raw_hash = e0.name_cp_index + raw_hash * 37;
1746 raw_hash = e0.slot + raw_hash * 37;
1747
1748 return raw_hash;
1749 }
1750 };
1751
1752
1753 // Class file LocalVariableTable elements.
1754 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1755 public:
1756 u2 start_bci;
1757 u2 length;
1758 u2 name_cp_index;
1759 u2 descriptor_cp_index;
1760 u2 slot;
1761 };
1762
1763 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1764 LocalVariableTableElement* const lvt) {
1765 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1766 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1767 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1768 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1769 lvt->signature_cp_index = 0;
1770 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1771 }
1772
1773 // Function is used to parse both attributes:
1774 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1775 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1776 u4 code_length,
1777 u2 max_locals,
1778 u4 code_attribute_length,
1779 u2* const localvariable_table_length,
1780 bool isLVTT,
1781 TRAPS) {
1782 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1783 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1784 const unsigned int size =
1785 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1786
1787 const ConstantPool* const cp = _cp;
1788
1789 // Verify local variable table attribute has right length
1790 if (_need_verify) {
1791 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1792 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1793 }
1794
1795 const u2* const localvariable_table_start = cfs->get_u2_buffer();
1796 assert(localvariable_table_start != NULL, "null local variable table");
1797 if (!_need_verify) {
1798 cfs->skip_u2_fast(size);
1799 } else {
1800 cfs->guarantee_more(size * 2, CHECK_NULL);
1801 for(int i = 0; i < (*localvariable_table_length); i++) {
1802 const u2 start_pc = cfs->get_u2_fast();
1803 const u2 length = cfs->get_u2_fast();
1804 const u2 name_index = cfs->get_u2_fast();
1805 const u2 descriptor_index = cfs->get_u2_fast();
1806 const u2 index = cfs->get_u2_fast();
1807 // Assign to a u4 to avoid overflow
1808 const u4 end_pc = (u4)start_pc + (u4)length;
1809
1810 if (start_pc >= code_length) {
1811 classfile_parse_error(
1812 "Invalid start_pc %u in %s in class file %s",
1813 start_pc, tbl_name, CHECK_NULL);
1814 }
1815 if (end_pc > code_length) {
1816 classfile_parse_error(
1817 "Invalid length %u in %s in class file %s",
1818 length, tbl_name, CHECK_NULL);
1819 }
1820 const int cp_size = cp->length();
1821 guarantee_property(valid_symbol_at(name_index),
1822 "Name index %u in %s has bad constant type in class file %s",
1823 name_index, tbl_name, CHECK_NULL);
1824 guarantee_property(valid_symbol_at(descriptor_index),
1825 "Signature index %u in %s has bad constant type in class file %s",
1826 descriptor_index, tbl_name, CHECK_NULL);
1827
1828 const Symbol* const name = cp->symbol_at(name_index);
1829 const Symbol* const sig = cp->symbol_at(descriptor_index);
1830 verify_legal_field_name(name, CHECK_NULL);
1831 u2 extra_slot = 0;
1832 if (!isLVTT) {
1833 verify_legal_field_signature(name, sig, CHECK_NULL);
1834
1835 // 4894874: check special cases for double and long local variables
1836 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1837 sig == vmSymbols::type_signature(T_LONG)) {
1838 extra_slot = 1;
1839 }
1840 }
1841 guarantee_property((index + extra_slot) < max_locals,
1842 "Invalid index %u in %s in class file %s",
1843 index, tbl_name, CHECK_NULL);
1844 }
1845 }
1846 return localvariable_table_start;
1847 }
1848
1849
1850 void ClassFileParser::parse_type_array(u2 array_length,
1851 u4 code_length,
1852 u4* const u1_index,
1853 u4* const u2_index,
1854 u1* const u1_array,
1855 u2* const u2_array,
1856 TRAPS) {
1857 const ClassFileStream* const cfs = _stream;
1858 u2 index = 0; // index in the array with long/double occupying two slots
1859 u4 i1 = *u1_index;
1860 u4 i2 = *u2_index + 1;
1861 for(int i = 0; i < array_length; i++) {
1862 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1863 index++;
1864 if (tag == ITEM_Long || tag == ITEM_Double) {
1865 index++;
1866 } else if (tag == ITEM_Object) {
1867 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1868 guarantee_property(valid_klass_reference_at(class_index),
1869 "Bad class index %u in StackMap in class file %s",
1870 class_index, CHECK);
1871 } else if (tag == ITEM_Uninitialized) {
1872 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1873 guarantee_property(
1874 offset < code_length,
1875 "Bad uninitialized type offset %u in StackMap in class file %s",
1876 offset, CHECK);
1877 } else {
1878 guarantee_property(
1879 tag <= (u1)ITEM_Uninitialized,
1880 "Unknown variable type %u in StackMap in class file %s",
1881 tag, CHECK);
1882 }
1883 }
1884 u2_array[*u2_index] = index;
1885 *u1_index = i1;
1886 *u2_index = i2;
1887 }
1888
1889 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1890 u4 code_attribute_length,
1891 bool need_verify,
1892 TRAPS) {
1893 assert(cfs != NULL, "invariant");
1894
1895 if (0 == code_attribute_length) {
1896 return NULL;
1897 }
1898
1899 const u1* const stackmap_table_start = cfs->get_u1_buffer();
1900 assert(stackmap_table_start != NULL, "null stackmap table");
1901
1902 // check code_attribute_length first
1903 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1904
1905 if (!need_verify && !DumpSharedSpaces) {
1906 return NULL;
1907 }
1908 return stackmap_table_start;
1909 }
1910
1911 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1912 u2* const checked_exceptions_length,
1913 u4 method_attribute_length,
1914 TRAPS) {
1915 assert(cfs != NULL, "invariant");
1916 assert(checked_exceptions_length != NULL, "invariant");
1917
1918 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1919 *checked_exceptions_length = cfs->get_u2_fast();
1920 const unsigned int size =
1921 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1922 const u2* const checked_exceptions_start = cfs->get_u2_buffer();
1923 assert(checked_exceptions_start != NULL, "null checked exceptions");
1924 if (!_need_verify) {
1925 cfs->skip_u2_fast(size);
1926 } else {
1927 // Verify each value in the checked exception table
1928 u2 checked_exception;
1929 const u2 len = *checked_exceptions_length;
1930 cfs->guarantee_more(2 * len, CHECK_NULL);
1931 for (int i = 0; i < len; i++) {
1932 checked_exception = cfs->get_u2_fast();
1933 check_property(
1934 valid_klass_reference_at(checked_exception),
1935 "Exception name has bad type at constant pool %u in class file %s",
1936 checked_exception, CHECK_NULL);
1937 }
1938 }
1939 // check exceptions attribute length
1940 if (_need_verify) {
1941 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1942 sizeof(u2) * size),
1943 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1944 }
1945 return checked_exceptions_start;
1946 }
1947
1948 void ClassFileParser::throwIllegalSignature(const char* type,
1949 const Symbol* name,
1950 const Symbol* sig,
1951 TRAPS) const {
1952 assert(name != NULL, "invariant");
1953 assert(sig != NULL, "invariant");
1954
1955 ResourceMark rm(THREAD);
1956 Exceptions::fthrow(THREAD_AND_LOCATION,
1957 vmSymbols::java_lang_ClassFormatError(),
1958 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1959 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1960 }
1961
1962 AnnotationCollector::ID
1963 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1964 const Symbol* name) {
1965 const vmSymbols::SID sid = vmSymbols::find_sid(name);
1966 // Privileged code can use all annotations. Other code silently drops some.
1967 const bool privileged = loader_data->is_the_null_class_loader_data() ||
1968 loader_data->is_platform_class_loader_data() ||
1969 loader_data->is_anonymous();
1970 switch (sid) {
1971 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
1972 if (_location != _in_method) break; // only allow for methods
1973 if (!privileged) break; // only allow in privileged code
1974 return _method_CallerSensitive;
1975 }
1976 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1977 if (_location != _in_method) break; // only allow for methods
1978 if (!privileged) break; // only allow in privileged code
1979 return _method_ForceInline;
1980 }
1981 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
1982 if (_location != _in_method) break; // only allow for methods
1983 if (!privileged) break; // only allow in privileged code
1984 return _method_DontInline;
1985 }
1986 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1987 if (_location != _in_method) break; // only allow for methods
1988 if (!privileged) break; // only allow in privileged code
1989 return _method_InjectedProfile;
1990 }
1991 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
1992 if (_location != _in_method) break; // only allow for methods
1993 if (!privileged) break; // only allow in privileged code
1994 return _method_LambdaForm_Compiled;
1995 }
1996 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
1997 if (_location != _in_method) break; // only allow for methods
1998 if (!privileged) break; // only allow in privileged code
1999 return _method_LambdaForm_Hidden;
2000 }
2001 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2002 if (_location != _in_method) break; // only allow for methods
2003 if (!privileged) break; // only allow in privileged code
2004 return _method_HotSpotIntrinsicCandidate;
2005 }
2006 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2007 if (_location != _in_field) break; // only allow for fields
2008 if (!privileged) break; // only allow in privileged code
2009 return _field_Stable;
2010 }
2011 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2012 if (_location != _in_field && _location != _in_class) {
2013 break; // only allow for fields and classes
2014 }
2015 if (!EnableContended || (RestrictContended && !privileged)) {
2016 break; // honor privileges
2017 }
2018 return _jdk_internal_vm_annotation_Contended;
2019 }
2020 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2021 if (_location != _in_method) break; // only allow for methods
2022 if (RestrictReservedStack && !privileged) break; // honor privileges
2023 return _jdk_internal_vm_annotation_ReservedStackAccess;
2024 }
2025 default: {
2026 break;
2027 }
2028 }
2029 return AnnotationCollector::_unknown;
2030 }
2031
2032 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2033 if (is_contended())
2034 f->set_contended_group(contended_group());
2035 if (is_stable())
2036 f->set_stable(true);
2037 }
2038
2039 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2040 // If there's an error deallocate metadata for field annotations
2041 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2042 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2043 }
2044
2045 void MethodAnnotationCollector::apply_to(methodHandle m) {
2046 if (has_annotation(_method_CallerSensitive))
2047 m->set_caller_sensitive(true);
2048 if (has_annotation(_method_ForceInline))
2049 m->set_force_inline(true);
2050 if (has_annotation(_method_DontInline))
2051 m->set_dont_inline(true);
2052 if (has_annotation(_method_InjectedProfile))
2053 m->set_has_injected_profile(true);
2054 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2055 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2056 if (has_annotation(_method_LambdaForm_Hidden))
2057 m->set_hidden(true);
2058 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2059 m->set_intrinsic_candidate(true);
2060 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2061 m->set_has_reserved_stack_access(true);
2062 }
2063
2064 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2065 assert(ik != NULL, "invariant");
2066 ik->set_is_contended(is_contended());
2067 }
2068
2069 #define MAX_ARGS_SIZE 255
2070 #define MAX_CODE_SIZE 65535
2071 #define INITIAL_MAX_LVT_NUMBER 256
2072
2073 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2074 *
2075 * Rules for LVT's and LVTT's are:
2076 * - There can be any number of LVT's and LVTT's.
2077 * - If there are n LVT's, it is the same as if there was just
2078 * one LVT containing all the entries from the n LVT's.
2079 * - There may be no more than one LVT entry per local variable.
2080 * Two LVT entries are 'equal' if these fields are the same:
2081 * start_pc, length, name, slot
2082 * - There may be no more than one LVTT entry per each LVT entry.
2083 * Each LVTT entry has to match some LVT entry.
2084 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2085 */
2086 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2087 int lvt_cnt,
2088 u2* const localvariable_table_length,
2089 const u2**const localvariable_table_start,
2090 int lvtt_cnt,
2091 u2* const localvariable_type_table_length,
2092 const u2**const localvariable_type_table_start,
2093 TRAPS) {
2094
2095 ResourceMark rm(THREAD);
2096
2097 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2098 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2099
2100 LVT_HashTable* const table = new LVT_HashTable();
2101
2102 // To fill LocalVariableTable in
2103 const Classfile_LVT_Element* cf_lvt;
2104 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2105
2106 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2107 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2108 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2109 copy_lvt_element(&cf_lvt[idx], lvt);
2110 // If no duplicates, add LVT elem in hashtable.
2111 if (table->put(*lvt, lvt) == false
2112 && _need_verify
2113 && _major_version >= JAVA_1_5_VERSION) {
2114 classfile_parse_error("Duplicated LocalVariableTable attribute "
2115 "entry for '%s' in class file %s",
2116 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2117 CHECK);
2118 }
2119 }
2120 }
2121
2122 // To merge LocalVariableTable and LocalVariableTypeTable
2123 const Classfile_LVT_Element* cf_lvtt;
2124 LocalVariableTableElement lvtt_elem;
2125
2126 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2127 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2128 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2129 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2130 LocalVariableTableElement** entry = table->get(lvtt_elem);
2131 if (entry == NULL) {
2132 if (_need_verify) {
2133 classfile_parse_error("LVTT entry for '%s' in class file %s "
2134 "does not match any LVT entry",
2135 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2136 CHECK);
2137 }
2138 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2139 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2140 "entry for '%s' in class file %s",
2141 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2142 CHECK);
2143 } else {
2144 // to add generic signatures into LocalVariableTable
2145 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2146 }
2147 }
2148 }
2149 }
2150
2151
2152 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2153 const u1* runtime_visible_annotations,
2154 int runtime_visible_annotations_length,
2155 const u1* runtime_invisible_annotations,
2156 int runtime_invisible_annotations_length,
2157 const u1* runtime_visible_parameter_annotations,
2158 int runtime_visible_parameter_annotations_length,
2159 const u1* runtime_invisible_parameter_annotations,
2160 int runtime_invisible_parameter_annotations_length,
2161 const u1* runtime_visible_type_annotations,
2162 int runtime_visible_type_annotations_length,
2163 const u1* runtime_invisible_type_annotations,
2164 int runtime_invisible_type_annotations_length,
2165 const u1* annotation_default,
2166 int annotation_default_length,
2167 TRAPS) {
2168
2169 AnnotationArray* a;
2170
2171 if (runtime_visible_annotations_length +
2172 runtime_invisible_annotations_length > 0) {
2173 a = assemble_annotations(runtime_visible_annotations,
2174 runtime_visible_annotations_length,
2175 runtime_invisible_annotations,
2176 runtime_invisible_annotations_length,
2177 CHECK);
2178 cm->set_method_annotations(a);
2179 }
2180
2181 if (runtime_visible_parameter_annotations_length +
2182 runtime_invisible_parameter_annotations_length > 0) {
2183 a = assemble_annotations(runtime_visible_parameter_annotations,
2184 runtime_visible_parameter_annotations_length,
2185 runtime_invisible_parameter_annotations,
2186 runtime_invisible_parameter_annotations_length,
2187 CHECK);
2188 cm->set_parameter_annotations(a);
2189 }
2190
2191 if (annotation_default_length > 0) {
2192 a = assemble_annotations(annotation_default,
2193 annotation_default_length,
2194 NULL,
2195 0,
2196 CHECK);
2197 cm->set_default_annotations(a);
2198 }
2199
2200 if (runtime_visible_type_annotations_length +
2201 runtime_invisible_type_annotations_length > 0) {
2202 a = assemble_annotations(runtime_visible_type_annotations,
2203 runtime_visible_type_annotations_length,
2204 runtime_invisible_type_annotations,
2205 runtime_invisible_type_annotations_length,
2206 CHECK);
2207 cm->set_type_annotations(a);
2208 }
2209 }
2210
2211
2212 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2213 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2214 // Method* to save footprint, so we only know the size of the resulting Method* when the
2215 // entire method attribute is parsed.
2216 //
2217 // The promoted_flags parameter is used to pass relevant access_flags
2218 // from the method back up to the containing klass. These flag values
2219 // are added to klass's access_flags.
2220
2221 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2222 bool is_interface,
2223 const ConstantPool* cp,
2224 AccessFlags* const promoted_flags,
2225 TRAPS) {
2226 assert(cfs != NULL, "invariant");
2227 assert(cp != NULL, "invariant");
2228 assert(promoted_flags != NULL, "invariant");
2229
2230 ResourceMark rm(THREAD);
2231 // Parse fixed parts:
2232 // access_flags, name_index, descriptor_index, attributes_count
2233 cfs->guarantee_more(8, CHECK_NULL);
2234
2235 int flags = cfs->get_u2_fast();
2236 const u2 name_index = cfs->get_u2_fast();
2237 const int cp_size = cp->length();
2238 check_property(
2239 valid_symbol_at(name_index),
2240 "Illegal constant pool index %u for method name in class file %s",
2241 name_index, CHECK_NULL);
2242 const Symbol* const name = cp->symbol_at(name_index);
2243 verify_legal_method_name(name, CHECK_NULL);
2244
2245 const u2 signature_index = cfs->get_u2_fast();
2246 guarantee_property(
2247 valid_symbol_at(signature_index),
2248 "Illegal constant pool index %u for method signature in class file %s",
2249 signature_index, CHECK_NULL);
2250 const Symbol* const signature = cp->symbol_at(signature_index);
2251
2252 if (name == vmSymbols::class_initializer_name()) {
2253 // We ignore the other access flags for a valid class initializer.
2254 // (JVM Spec 2nd ed., chapter 4.6)
2255 if (_major_version < 51) { // backward compatibility
2256 flags = JVM_ACC_STATIC;
2257 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2258 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2259 } else {
2260 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2261 }
2262 } else {
2263 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2264 }
2265
2266 if (name == vmSymbols::object_initializer_name() && is_interface) {
2267 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2268 }
2269
2270 int args_size = -1; // only used when _need_verify is true
2271 if (_need_verify) {
2272 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2273 verify_legal_method_signature(name, signature, CHECK_NULL);
2274 if (args_size > MAX_ARGS_SIZE) {
2275 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2276 }
2277 }
2278
2279 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2280
2281 // Default values for code and exceptions attribute elements
2282 u2 max_stack = 0;
2283 u2 max_locals = 0;
2284 u4 code_length = 0;
2285 const u1* code_start = 0;
2286 u2 exception_table_length = 0;
2287 const u2* exception_table_start = NULL;
2288 Array<int>* exception_handlers = Universe::the_empty_int_array();
2289 u2 checked_exceptions_length = 0;
2290 const u2* checked_exceptions_start = NULL;
2291 CompressedLineNumberWriteStream* linenumber_table = NULL;
2292 int linenumber_table_length = 0;
2293 int total_lvt_length = 0;
2294 u2 lvt_cnt = 0;
2295 u2 lvtt_cnt = 0;
2296 bool lvt_allocated = false;
2297 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2298 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2299 u2* localvariable_table_length = NULL;
2300 const u2** localvariable_table_start = NULL;
2301 u2* localvariable_type_table_length = NULL;
2302 const u2** localvariable_type_table_start = NULL;
2303 int method_parameters_length = -1;
2304 const u1* method_parameters_data = NULL;
2305 bool method_parameters_seen = false;
2306 bool parsed_code_attribute = false;
2307 bool parsed_checked_exceptions_attribute = false;
2308 bool parsed_stackmap_attribute = false;
2309 // stackmap attribute - JDK1.5
2310 const u1* stackmap_data = NULL;
2311 int stackmap_data_length = 0;
2312 u2 generic_signature_index = 0;
2313 MethodAnnotationCollector parsed_annotations;
2314 const u1* runtime_visible_annotations = NULL;
2315 int runtime_visible_annotations_length = 0;
2316 const u1* runtime_invisible_annotations = NULL;
2317 int runtime_invisible_annotations_length = 0;
2318 const u1* runtime_visible_parameter_annotations = NULL;
2319 int runtime_visible_parameter_annotations_length = 0;
2320 const u1* runtime_invisible_parameter_annotations = NULL;
2321 int runtime_invisible_parameter_annotations_length = 0;
2322 const u1* runtime_visible_type_annotations = NULL;
2323 int runtime_visible_type_annotations_length = 0;
2324 const u1* runtime_invisible_type_annotations = NULL;
2325 int runtime_invisible_type_annotations_length = 0;
2326 bool runtime_invisible_annotations_exists = false;
2327 bool runtime_invisible_type_annotations_exists = false;
2328 bool runtime_invisible_parameter_annotations_exists = false;
2329 const u1* annotation_default = NULL;
2330 int annotation_default_length = 0;
2331
2332 // Parse code and exceptions attribute
2333 u2 method_attributes_count = cfs->get_u2_fast();
2334 while (method_attributes_count--) {
2335 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2336 const u2 method_attribute_name_index = cfs->get_u2_fast();
2337 const u4 method_attribute_length = cfs->get_u4_fast();
2338 check_property(
2339 valid_symbol_at(method_attribute_name_index),
2340 "Invalid method attribute name index %u in class file %s",
2341 method_attribute_name_index, CHECK_NULL);
2342
2343 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2344 if (method_attribute_name == vmSymbols::tag_code()) {
2345 // Parse Code attribute
2346 if (_need_verify) {
2347 guarantee_property(
2348 !access_flags.is_native() && !access_flags.is_abstract(),
2349 "Code attribute in native or abstract methods in class file %s",
2350 CHECK_NULL);
2351 }
2352 if (parsed_code_attribute) {
2353 classfile_parse_error("Multiple Code attributes in class file %s",
2354 CHECK_NULL);
2355 }
2356 parsed_code_attribute = true;
2357
2358 // Stack size, locals size, and code size
2359 if (_major_version == 45 && _minor_version <= 2) {
2360 cfs->guarantee_more(4, CHECK_NULL);
2361 max_stack = cfs->get_u1_fast();
2362 max_locals = cfs->get_u1_fast();
2363 code_length = cfs->get_u2_fast();
2364 } else {
2365 cfs->guarantee_more(8, CHECK_NULL);
2366 max_stack = cfs->get_u2_fast();
2367 max_locals = cfs->get_u2_fast();
2368 code_length = cfs->get_u4_fast();
2369 }
2370 if (_need_verify) {
2371 guarantee_property(args_size <= max_locals,
2372 "Arguments can't fit into locals in class file %s",
2373 CHECK_NULL);
2374 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2375 "Invalid method Code length %u in class file %s",
2376 code_length, CHECK_NULL);
2377 }
2378 // Code pointer
2379 code_start = cfs->get_u1_buffer();
2380 assert(code_start != NULL, "null code start");
2381 cfs->guarantee_more(code_length, CHECK_NULL);
2382 cfs->skip_u1_fast(code_length);
2383
2384 // Exception handler table
2385 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2386 exception_table_length = cfs->get_u2_fast();
2387 if (exception_table_length > 0) {
2388 exception_table_start = parse_exception_table(cfs,
2389 code_length,
2390 exception_table_length,
2391 CHECK_NULL);
2392 }
2393
2394 // Parse additional attributes in code attribute
2395 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2396 u2 code_attributes_count = cfs->get_u2_fast();
2397
2398 unsigned int calculated_attribute_length = 0;
2399
2400 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2401 calculated_attribute_length =
2402 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2403 } else {
2404 // max_stack, locals and length are smaller in pre-version 45.2 classes
2405 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2406 }
2407 calculated_attribute_length +=
2408 code_length +
2409 sizeof(exception_table_length) +
2410 sizeof(code_attributes_count) +
2411 exception_table_length *
2412 ( sizeof(u2) + // start_pc
2413 sizeof(u2) + // end_pc
2414 sizeof(u2) + // handler_pc
2415 sizeof(u2) ); // catch_type_index
2416
2417 while (code_attributes_count--) {
2418 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2419 const u2 code_attribute_name_index = cfs->get_u2_fast();
2420 const u4 code_attribute_length = cfs->get_u4_fast();
2421 calculated_attribute_length += code_attribute_length +
2422 sizeof(code_attribute_name_index) +
2423 sizeof(code_attribute_length);
2424 check_property(valid_symbol_at(code_attribute_name_index),
2425 "Invalid code attribute name index %u in class file %s",
2426 code_attribute_name_index,
2427 CHECK_NULL);
2428 if (LoadLineNumberTables &&
2429 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2430 // Parse and compress line number table
2431 parse_linenumber_table(code_attribute_length,
2432 code_length,
2433 &linenumber_table,
2434 CHECK_NULL);
2435
2436 } else if (LoadLocalVariableTables &&
2437 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2438 // Parse local variable table
2439 if (!lvt_allocated) {
2440 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2441 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2442 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2443 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2444 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2445 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2446 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2447 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2448 lvt_allocated = true;
2449 }
2450 if (lvt_cnt == max_lvt_cnt) {
2451 max_lvt_cnt <<= 1;
2452 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2453 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2454 }
2455 localvariable_table_start[lvt_cnt] =
2456 parse_localvariable_table(cfs,
2457 code_length,
2458 max_locals,
2459 code_attribute_length,
2460 &localvariable_table_length[lvt_cnt],
2461 false, // is not LVTT
2462 CHECK_NULL);
2463 total_lvt_length += localvariable_table_length[lvt_cnt];
2464 lvt_cnt++;
2465 } else if (LoadLocalVariableTypeTables &&
2466 _major_version >= JAVA_1_5_VERSION &&
2467 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2468 if (!lvt_allocated) {
2469 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2470 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2471 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2472 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2473 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2474 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2475 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2476 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2477 lvt_allocated = true;
2478 }
2479 // Parse local variable type table
2480 if (lvtt_cnt == max_lvtt_cnt) {
2481 max_lvtt_cnt <<= 1;
2482 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2483 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2484 }
2485 localvariable_type_table_start[lvtt_cnt] =
2486 parse_localvariable_table(cfs,
2487 code_length,
2488 max_locals,
2489 code_attribute_length,
2490 &localvariable_type_table_length[lvtt_cnt],
2491 true, // is LVTT
2492 CHECK_NULL);
2493 lvtt_cnt++;
2494 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2495 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2496 // Stack map is only needed by the new verifier in JDK1.5.
2497 if (parsed_stackmap_attribute) {
2498 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2499 }
2500 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2501 stackmap_data_length = code_attribute_length;
2502 parsed_stackmap_attribute = true;
2503 } else {
2504 // Skip unknown attributes
2505 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2506 }
2507 }
2508 // check method attribute length
2509 if (_need_verify) {
2510 guarantee_property(method_attribute_length == calculated_attribute_length,
2511 "Code segment has wrong length in class file %s",
2512 CHECK_NULL);
2513 }
2514 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2515 // Parse Exceptions attribute
2516 if (parsed_checked_exceptions_attribute) {
2517 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2518 CHECK_NULL);
2519 }
2520 parsed_checked_exceptions_attribute = true;
2521 checked_exceptions_start =
2522 parse_checked_exceptions(cfs,
2523 &checked_exceptions_length,
2524 method_attribute_length,
2525 CHECK_NULL);
2526 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2527 // reject multiple method parameters
2528 if (method_parameters_seen) {
2529 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2530 CHECK_NULL);
2531 }
2532 method_parameters_seen = true;
2533 method_parameters_length = cfs->get_u1_fast();
2534 const u2 real_length = (method_parameters_length * 4u) + 1u;
2535 if (method_attribute_length != real_length) {
2536 classfile_parse_error(
2537 "Invalid MethodParameters method attribute length %u in class file",
2538 method_attribute_length, CHECK_NULL);
2539 }
2540 method_parameters_data = cfs->get_u1_buffer();
2541 cfs->skip_u2_fast(method_parameters_length);
2542 cfs->skip_u2_fast(method_parameters_length);
2543 // ignore this attribute if it cannot be reflected
2544 if (!SystemDictionary::Parameter_klass_loaded())
2545 method_parameters_length = -1;
2546 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2547 if (method_attribute_length != 0) {
2548 classfile_parse_error(
2549 "Invalid Synthetic method attribute length %u in class file %s",
2550 method_attribute_length, CHECK_NULL);
2551 }
2552 // Should we check that there hasn't already been a synthetic attribute?
2553 access_flags.set_is_synthetic();
2554 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2555 if (method_attribute_length != 0) {
2556 classfile_parse_error(
2557 "Invalid Deprecated method attribute length %u in class file %s",
2558 method_attribute_length, CHECK_NULL);
2559 }
2560 } else if (_major_version >= JAVA_1_5_VERSION) {
2561 if (method_attribute_name == vmSymbols::tag_signature()) {
2562 if (method_attribute_length != 2) {
2563 classfile_parse_error(
2564 "Invalid Signature attribute length %u in class file %s",
2565 method_attribute_length, CHECK_NULL);
2566 }
2567 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2568 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2569 if (runtime_visible_annotations != NULL) {
2570 classfile_parse_error(
2571 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2572 CHECK_NULL);
2573 }
2574 runtime_visible_annotations_length = method_attribute_length;
2575 runtime_visible_annotations = cfs->get_u1_buffer();
2576 assert(runtime_visible_annotations != NULL, "null visible annotations");
2577 parse_annotations(cp,
2578 runtime_visible_annotations,
2579 runtime_visible_annotations_length,
2580 &parsed_annotations,
2581 _loader_data,
2582 CHECK_NULL);
2583 cfs->skip_u1(runtime_visible_annotations_length, CHECK_NULL);
2584 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2585 if (runtime_invisible_annotations_exists) {
2586 classfile_parse_error(
2587 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2588 CHECK_NULL);
2589 }
2590 runtime_invisible_annotations_exists = true;
2591 if (PreserveAllAnnotations) {
2592 runtime_invisible_annotations_length = method_attribute_length;
2593 runtime_invisible_annotations = cfs->get_u1_buffer();
2594 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2595 }
2596 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2597 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2598 if (runtime_visible_parameter_annotations != NULL) {
2599 classfile_parse_error(
2600 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2601 CHECK_NULL);
2602 }
2603 runtime_visible_parameter_annotations_length = method_attribute_length;
2604 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2605 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2606 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2607 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2608 if (runtime_invisible_parameter_annotations_exists) {
2609 classfile_parse_error(
2610 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2611 CHECK_NULL);
2612 }
2613 runtime_invisible_parameter_annotations_exists = true;
2614 if (PreserveAllAnnotations) {
2615 runtime_invisible_parameter_annotations_length = method_attribute_length;
2616 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2617 assert(runtime_invisible_parameter_annotations != NULL,
2618 "null invisible parameter annotations");
2619 }
2620 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2621 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2622 if (annotation_default != NULL) {
2623 classfile_parse_error(
2624 "Multiple AnnotationDefault attributes for method in class file %s",
2625 CHECK_NULL);
2626 }
2627 annotation_default_length = method_attribute_length;
2628 annotation_default = cfs->get_u1_buffer();
2629 assert(annotation_default != NULL, "null annotation default");
2630 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2631 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2632 if (runtime_visible_type_annotations != NULL) {
2633 classfile_parse_error(
2634 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2635 CHECK_NULL);
2636 }
2637 runtime_visible_type_annotations_length = method_attribute_length;
2638 runtime_visible_type_annotations = cfs->get_u1_buffer();
2639 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2640 // No need for the VM to parse Type annotations
2641 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2642 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2643 if (runtime_invisible_type_annotations_exists) {
2644 classfile_parse_error(
2645 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2646 CHECK_NULL);
2647 } else {
2648 runtime_invisible_type_annotations_exists = true;
2649 }
2650 if (PreserveAllAnnotations) {
2651 runtime_invisible_type_annotations_length = method_attribute_length;
2652 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2653 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2654 }
2655 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2656 } else {
2657 // Skip unknown attributes
2658 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2659 }
2660 } else {
2661 // Skip unknown attributes
2662 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2663 }
2664 }
2665
2666 if (linenumber_table != NULL) {
2667 linenumber_table->write_terminator();
2668 linenumber_table_length = linenumber_table->position();
2669 }
2670
2671 // Make sure there's at least one Code attribute in non-native/non-abstract method
2672 if (_need_verify) {
2673 guarantee_property(access_flags.is_native() ||
2674 access_flags.is_abstract() ||
2675 parsed_code_attribute,
2676 "Absent Code attribute in method that is not native or abstract in class file %s",
2677 CHECK_NULL);
2678 }
2679
2680 // All sizing information for a Method* is finally available, now create it
2681 InlineTableSizes sizes(
2682 total_lvt_length,
2683 linenumber_table_length,
2684 exception_table_length,
2685 checked_exceptions_length,
2686 method_parameters_length,
2687 generic_signature_index,
2688 runtime_visible_annotations_length +
2689 runtime_invisible_annotations_length,
2690 runtime_visible_parameter_annotations_length +
2691 runtime_invisible_parameter_annotations_length,
2692 runtime_visible_type_annotations_length +
2693 runtime_invisible_type_annotations_length,
2694 annotation_default_length,
2695 0);
2696
2697 Method* const m = Method::allocate(_loader_data,
2698 code_length,
2699 access_flags,
2700 &sizes,
2701 ConstMethod::NORMAL,
2702 CHECK_NULL);
2703
2704 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2705
2706 // Fill in information from fixed part (access_flags already set)
2707 m->set_constants(_cp);
2708 m->set_name_index(name_index);
2709 m->set_signature_index(signature_index);
2710
2711 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2712 m->constMethod()->set_result_type(rtf.type());
2713
2714 if (args_size >= 0) {
2715 m->set_size_of_parameters(args_size);
2716 } else {
2717 m->compute_size_of_parameters(THREAD);
2718 }
2719 #ifdef ASSERT
2720 if (args_size >= 0) {
2721 m->compute_size_of_parameters(THREAD);
2722 assert(args_size == m->size_of_parameters(), "");
2723 }
2724 #endif
2725
2726 // Fill in code attribute information
2727 m->set_max_stack(max_stack);
2728 m->set_max_locals(max_locals);
2729 if (stackmap_data != NULL) {
2730 m->constMethod()->copy_stackmap_data(_loader_data,
2731 (u1*)stackmap_data,
2732 stackmap_data_length,
2733 CHECK_NULL);
2734 }
2735
2736 // Copy byte codes
2737 m->set_code((u1*)code_start);
2738
2739 // Copy line number table
2740 if (linenumber_table != NULL) {
2741 memcpy(m->compressed_linenumber_table(),
2742 linenumber_table->buffer(),
2743 linenumber_table_length);
2744 }
2745
2746 // Copy exception table
2747 if (exception_table_length > 0) {
2748 int size =
2749 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2750 copy_u2_with_conversion((u2*) m->exception_table_start(),
2751 exception_table_start, size);
2752 }
2753
2754 // Copy method parameters
2755 if (method_parameters_length > 0) {
2756 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2757 for (int i = 0; i < method_parameters_length; i++) {
2758 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2759 method_parameters_data += 2;
2760 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2761 method_parameters_data += 2;
2762 }
2763 }
2764
2765 // Copy checked exceptions
2766 if (checked_exceptions_length > 0) {
2767 const int size =
2768 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2769 copy_u2_with_conversion((u2*) m->checked_exceptions_start(),
2770 checked_exceptions_start,
2771 size);
2772 }
2773
2774 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2775 if (total_lvt_length > 0) {
2776 promoted_flags->set_has_localvariable_table();
2777 copy_localvariable_table(m->constMethod(),
2778 lvt_cnt,
2779 localvariable_table_length,
2780 localvariable_table_start,
2781 lvtt_cnt,
2782 localvariable_type_table_length,
2783 localvariable_type_table_start,
2784 CHECK_NULL);
2785 }
2786
2787 if (parsed_annotations.has_any_annotations())
2788 parsed_annotations.apply_to(m);
2789
2790 // Copy annotations
2791 copy_method_annotations(m->constMethod(),
2792 runtime_visible_annotations,
2793 runtime_visible_annotations_length,
2794 runtime_invisible_annotations,
2795 runtime_invisible_annotations_length,
2796 runtime_visible_parameter_annotations,
2797 runtime_visible_parameter_annotations_length,
2798 runtime_invisible_parameter_annotations,
2799 runtime_invisible_parameter_annotations_length,
2800 runtime_visible_type_annotations,
2801 runtime_visible_type_annotations_length,
2802 runtime_invisible_type_annotations,
2803 runtime_invisible_type_annotations_length,
2804 annotation_default,
2805 annotation_default_length,
2806 CHECK_NULL);
2807
2808 if (name == vmSymbols::finalize_method_name() &&
2809 signature == vmSymbols::void_method_signature()) {
2810 if (m->is_empty_method()) {
2811 _has_empty_finalizer = true;
2812 } else {
2813 _has_finalizer = true;
2814 }
2815 }
2816 if (name == vmSymbols::object_initializer_name() &&
2817 signature == vmSymbols::void_method_signature() &&
2818 m->is_vanilla_constructor()) {
2819 _has_vanilla_constructor = true;
2820 }
2821
2822 NOT_PRODUCT(m->verify());
2823 return m;
2824 }
2825
2826
2827 // The promoted_flags parameter is used to pass relevant access_flags
2828 // from the methods back up to the containing klass. These flag values
2829 // are added to klass's access_flags.
2830 // Side-effects: populates the _methods field in the parser
2831 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2832 bool is_interface,
2833 AccessFlags* promoted_flags,
2834 bool* has_final_method,
2835 bool* declares_nonstatic_concrete_methods,
2836 TRAPS) {
2837 assert(cfs != NULL, "invariant");
2838 assert(promoted_flags != NULL, "invariant");
2839 assert(has_final_method != NULL, "invariant");
2840 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2841
2842 assert(NULL == _methods, "invariant");
2843
2844 cfs->guarantee_more(2, CHECK); // length
2845 const u2 length = cfs->get_u2_fast();
2846 if (length == 0) {
2847 _methods = Universe::the_empty_method_array();
2848 } else {
2849 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2850 length,
2851 NULL,
2852 CHECK);
2853
2854 HandleMark hm(THREAD);
2855 for (int index = 0; index < length; index++) {
2856 Method* method = parse_method(cfs,
2857 is_interface,
2858 _cp,
2859 promoted_flags,
2860 CHECK);
2861
2862 if (method->is_final()) {
2863 *has_final_method = true;
2864 }
2865 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2866 // used for interface initialization, and default method inheritance analysis
2867 if (is_interface && !(*declares_nonstatic_concrete_methods)
2868 && !method->is_abstract() && !method->is_static()) {
2869 *declares_nonstatic_concrete_methods = true;
2870 }
2871 _methods->at_put(index, method);
2872 }
2873
2874 if (_need_verify && length > 1) {
2875 // Check duplicated methods
2876 ResourceMark rm(THREAD);
2877 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2878 THREAD, NameSigHash*, HASH_ROW_SIZE);
2879 initialize_hashtable(names_and_sigs);
2880 bool dup = false;
2881 {
2882 debug_only(NoSafepointVerifier nsv;)
2883 for (int i = 0; i < length; i++) {
2884 const Method* const m = _methods->at(i);
2885 // If no duplicates, add name/signature in hashtable names_and_sigs.
2886 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2887 dup = true;
2888 break;
2889 }
2890 }
2891 }
2892 if (dup) {
2893 classfile_parse_error("Duplicate method name&signature in class file %s",
2894 CHECK);
2895 }
2896 }
2897 }
2898 }
2899
2900 static const intArray* sort_methods(Array<Method*>* methods) {
2901 const int length = methods->length();
2902 // If JVMTI original method ordering or sharing is enabled we have to
2903 // remember the original class file ordering.
2904 // We temporarily use the vtable_index field in the Method* to store the
2905 // class file index, so we can read in after calling qsort.
2906 // Put the method ordering in the shared archive.
2907 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2908 for (int index = 0; index < length; index++) {
2909 Method* const m = methods->at(index);
2910 assert(!m->valid_vtable_index(), "vtable index should not be set");
2911 m->set_vtable_index(index);
2912 }
2913 }
2914 // Sort method array by ascending method name (for faster lookups & vtable construction)
2915 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2916 Method::sort_methods(methods);
2917
2918 intArray* method_ordering = NULL;
2919 // If JVMTI original method ordering or sharing is enabled construct int
2920 // array remembering the original ordering
2921 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2922 method_ordering = new intArray(length, length, -1);
2923 for (int index = 0; index < length; index++) {
2924 Method* const m = methods->at(index);
2925 const int old_index = m->vtable_index();
2926 assert(old_index >= 0 && old_index < length, "invalid method index");
2927 method_ordering->at_put(index, old_index);
2928 m->set_vtable_index(Method::invalid_vtable_index);
2929 }
2930 }
2931 return method_ordering;
2932 }
2933
2934 // Parse generic_signature attribute for methods and fields
2935 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2936 TRAPS) {
2937 assert(cfs != NULL, "invariant");
2938
2939 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2940 const u2 generic_signature_index = cfs->get_u2_fast();
2941 check_property(
2942 valid_symbol_at(generic_signature_index),
2943 "Invalid Signature attribute at constant pool index %u in class file %s",
2944 generic_signature_index, CHECK_0);
2945 return generic_signature_index;
2946 }
2947
2948 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2949 TRAPS) {
2950
2951 assert(cfs != NULL, "invariant");
2952
2953 cfs->guarantee_more(2, CHECK); // sourcefile_index
2954 const u2 sourcefile_index = cfs->get_u2_fast();
2955 check_property(
2956 valid_symbol_at(sourcefile_index),
2957 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2958 sourcefile_index, CHECK);
2959 set_class_sourcefile_index(sourcefile_index);
2960 }
2961
2962 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2963 int length,
2964 TRAPS) {
2965 assert(cfs != NULL, "invariant");
2966
2967 const u1* const sde_buffer = cfs->get_u1_buffer();
2968 assert(sde_buffer != NULL, "null sde buffer");
2969
2970 // Don't bother storing it if there is no way to retrieve it
2971 if (JvmtiExport::can_get_source_debug_extension()) {
2972 assert((length+1) > length, "Overflow checking");
2973 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2974 for (int i = 0; i < length; i++) {
2975 sde[i] = sde_buffer[i];
2976 }
2977 sde[length] = '\0';
2978 set_class_sde_buffer((const char*)sde, length);
2979 }
2980 // Got utf8 string, set stream position forward
2981 cfs->skip_u1(length, CHECK);
2982 }
2983
2984
2985 // Inner classes can be static, private or protected (classic VM does this)
2986 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
2987 JVM_ACC_PRIVATE | \
2988 JVM_ACC_PROTECTED | \
2989 JVM_ACC_STATIC \
2990 )
2991
2992 // Return number of classes in the inner classes attribute table
2993 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
2994 const u1* const inner_classes_attribute_start,
2995 bool parsed_enclosingmethod_attribute,
2996 u2 enclosing_method_class_index,
2997 u2 enclosing_method_method_index,
2998 TRAPS) {
2999 const u1* const current_mark = cfs->current();
3000 u2 length = 0;
3001 if (inner_classes_attribute_start != NULL) {
3002 cfs->set_current(inner_classes_attribute_start);
3003 cfs->guarantee_more(2, CHECK_0); // length
3004 length = cfs->get_u2_fast();
3005 }
3006
3007 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3008 // method data:
3009 // [inner_class_info_index,
3010 // outer_class_info_index,
3011 // inner_name_index,
3012 // inner_class_access_flags,
3013 // ...
3014 // enclosing_method_class_index,
3015 // enclosing_method_method_index]
3016 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3017 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3018 _inner_classes = inner_classes;
3019
3020 int index = 0;
3021 const int cp_size = _cp->length();
3022 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3023 for (int n = 0; n < length; n++) {
3024 // Inner class index
3025 const u2 inner_class_info_index = cfs->get_u2_fast();
3026 check_property(
3027 valid_klass_reference_at(inner_class_info_index),
3028 "inner_class_info_index %u has bad constant type in class file %s",
3029 inner_class_info_index, CHECK_0);
3030 // Outer class index
3031 const u2 outer_class_info_index = cfs->get_u2_fast();
3032 check_property(
3033 outer_class_info_index == 0 ||
3034 valid_klass_reference_at(outer_class_info_index),
3035 "outer_class_info_index %u has bad constant type in class file %s",
3036 outer_class_info_index, CHECK_0);
3037 // Inner class name
3038 const u2 inner_name_index = cfs->get_u2_fast();
3039 check_property(
3040 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3041 "inner_name_index %u has bad constant type in class file %s",
3042 inner_name_index, CHECK_0);
3043 if (_need_verify) {
3044 guarantee_property(inner_class_info_index != outer_class_info_index,
3045 "Class is both outer and inner class in class file %s", CHECK_0);
3046 }
3047 // Access flags
3048 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3049 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3050 // Set abstract bit for old class files for backward compatibility
3051 flags |= JVM_ACC_ABSTRACT;
3052 }
3053 verify_legal_class_modifiers(flags, CHECK_0);
3054 AccessFlags inner_access_flags(flags);
3055
3056 inner_classes->at_put(index++, inner_class_info_index);
3057 inner_classes->at_put(index++, outer_class_info_index);
3058 inner_classes->at_put(index++, inner_name_index);
3059 inner_classes->at_put(index++, inner_access_flags.as_short());
3060 }
3061
3062 // 4347400: make sure there's no duplicate entry in the classes array
3063 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3064 for(int i = 0; i < length * 4; i += 4) {
3065 for(int j = i + 4; j < length * 4; j += 4) {
3066 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3067 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3068 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3069 inner_classes->at(i+3) != inner_classes->at(j+3)),
3070 "Duplicate entry in InnerClasses in class file %s",
3071 CHECK_0);
3072 }
3073 }
3074 }
3075
3076 // Set EnclosingMethod class and method indexes.
3077 if (parsed_enclosingmethod_attribute) {
3078 inner_classes->at_put(index++, enclosing_method_class_index);
3079 inner_classes->at_put(index++, enclosing_method_method_index);
3080 }
3081 assert(index == size, "wrong size");
3082
3083 // Restore buffer's current position.
3084 cfs->set_current(current_mark);
3085
3086 return length;
3087 }
3088
3089 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3090 set_class_synthetic_flag(true);
3091 }
3092
3093 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3094 assert(cfs != NULL, "invariant");
3095
3096 const u2 signature_index = cfs->get_u2(CHECK);
3097 check_property(
3098 valid_symbol_at(signature_index),
3099 "Invalid constant pool index %u in Signature attribute in class file %s",
3100 signature_index, CHECK);
3101 set_class_generic_signature_index(signature_index);
3102 }
3103
3104 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3105 ConstantPool* cp,
3106 u4 attribute_byte_length,
3107 TRAPS) {
3108 assert(cfs != NULL, "invariant");
3109 assert(cp != NULL, "invariant");
3110
3111 const u1* const current_start = cfs->current();
3112
3113 guarantee_property(attribute_byte_length >= sizeof(u2),
3114 "Invalid BootstrapMethods attribute length %u in class file %s",
3115 attribute_byte_length,
3116 CHECK);
3117
3118 cfs->guarantee_more(attribute_byte_length, CHECK);
3119
3120 const int attribute_array_length = cfs->get_u2_fast();
3121
3122 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3123 "Short length on BootstrapMethods in class file %s",
3124 CHECK);
3125
3126
3127 // The attribute contains a counted array of counted tuples of shorts,
3128 // represending bootstrap specifiers:
3129 // length*{bootstrap_method_index, argument_count*{argument_index}}
3130 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3131 // operand_count = number of shorts in attr, except for leading length
3132
3133 // The attribute is copied into a short[] array.
3134 // The array begins with a series of short[2] pairs, one for each tuple.
3135 const int index_size = (attribute_array_length * 2);
3136
3137 Array<u2>* const operands =
3138 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3139
3140 // Eagerly assign operands so they will be deallocated with the constant
3141 // pool if there is an error.
3142 cp->set_operands(operands);
3143
3144 int operand_fill_index = index_size;
3145 const int cp_size = cp->length();
3146
3147 for (int n = 0; n < attribute_array_length; n++) {
3148 // Store a 32-bit offset into the header of the operand array.
3149 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3150
3151 // Read a bootstrap specifier.
3152 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3153 const u2 bootstrap_method_index = cfs->get_u2_fast();
3154 const u2 argument_count = cfs->get_u2_fast();
3155 check_property(
3156 valid_cp_range(bootstrap_method_index, cp_size) &&
3157 cp->tag_at(bootstrap_method_index).is_method_handle(),
3158 "bootstrap_method_index %u has bad constant type in class file %s",
3159 bootstrap_method_index,
3160 CHECK);
3161
3162 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3163 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3164 CHECK);
3165
3166 operands->at_put(operand_fill_index++, bootstrap_method_index);
3167 operands->at_put(operand_fill_index++, argument_count);
3168
3169 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3170 for (int j = 0; j < argument_count; j++) {
3171 const u2 argument_index = cfs->get_u2_fast();
3172 check_property(
3173 valid_cp_range(argument_index, cp_size) &&
3174 cp->tag_at(argument_index).is_loadable_constant(),
3175 "argument_index %u has bad constant type in class file %s",
3176 argument_index,
3177 CHECK);
3178 operands->at_put(operand_fill_index++, argument_index);
3179 }
3180 }
3181 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3182 "Bad length on BootstrapMethods in class file %s",
3183 CHECK);
3184 }
3185
3186 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3187 ConstantPool* cp,
3188 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3189 TRAPS) {
3190 assert(cfs != NULL, "invariant");
3191 assert(cp != NULL, "invariant");
3192 assert(parsed_annotations != NULL, "invariant");
3193
3194 // Set inner classes attribute to default sentinel
3195 _inner_classes = Universe::the_empty_short_array();
3196 cfs->guarantee_more(2, CHECK); // attributes_count
3197 u2 attributes_count = cfs->get_u2_fast();
3198 bool parsed_sourcefile_attribute = false;
3199 bool parsed_innerclasses_attribute = false;
3200 bool parsed_enclosingmethod_attribute = false;
3201 bool parsed_bootstrap_methods_attribute = false;
3202 const u1* runtime_visible_annotations = NULL;
3203 int runtime_visible_annotations_length = 0;
3204 const u1* runtime_invisible_annotations = NULL;
3205 int runtime_invisible_annotations_length = 0;
3206 const u1* runtime_visible_type_annotations = NULL;
3207 int runtime_visible_type_annotations_length = 0;
3208 const u1* runtime_invisible_type_annotations = NULL;
3209 int runtime_invisible_type_annotations_length = 0;
3210 bool runtime_invisible_type_annotations_exists = false;
3211 bool runtime_invisible_annotations_exists = false;
3212 bool parsed_source_debug_ext_annotations_exist = false;
3213 const u1* inner_classes_attribute_start = NULL;
3214 u4 inner_classes_attribute_length = 0;
3215 u2 enclosing_method_class_index = 0;
3216 u2 enclosing_method_method_index = 0;
3217 // Iterate over attributes
3218 while (attributes_count--) {
3219 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3220 const u2 attribute_name_index = cfs->get_u2_fast();
3221 const u4 attribute_length = cfs->get_u4_fast();
3222 check_property(
3223 valid_symbol_at(attribute_name_index),
3224 "Attribute name has bad constant pool index %u in class file %s",
3225 attribute_name_index, CHECK);
3226 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3227 if (tag == vmSymbols::tag_source_file()) {
3228 // Check for SourceFile tag
3229 if (_need_verify) {
3230 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3231 }
3232 if (parsed_sourcefile_attribute) {
3233 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3234 } else {
3235 parsed_sourcefile_attribute = true;
3236 }
3237 parse_classfile_sourcefile_attribute(cfs, CHECK);
3238 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3239 // Check for SourceDebugExtension tag
3240 if (parsed_source_debug_ext_annotations_exist) {
3241 classfile_parse_error(
3242 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3243 }
3244 parsed_source_debug_ext_annotations_exist = true;
3245 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3246 } else if (tag == vmSymbols::tag_inner_classes()) {
3247 // Check for InnerClasses tag
3248 if (parsed_innerclasses_attribute) {
3249 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3250 } else {
3251 parsed_innerclasses_attribute = true;
3252 }
3253 inner_classes_attribute_start = cfs->get_u1_buffer();
3254 inner_classes_attribute_length = attribute_length;
3255 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3256 } else if (tag == vmSymbols::tag_synthetic()) {
3257 // Check for Synthetic tag
3258 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3259 if (attribute_length != 0) {
3260 classfile_parse_error(
3261 "Invalid Synthetic classfile attribute length %u in class file %s",
3262 attribute_length, CHECK);
3263 }
3264 parse_classfile_synthetic_attribute(CHECK);
3265 } else if (tag == vmSymbols::tag_deprecated()) {
3266 // Check for Deprecatd tag - 4276120
3267 if (attribute_length != 0) {
3268 classfile_parse_error(
3269 "Invalid Deprecated classfile attribute length %u in class file %s",
3270 attribute_length, CHECK);
3271 }
3272 } else if (_major_version >= JAVA_1_5_VERSION) {
3273 if (tag == vmSymbols::tag_signature()) {
3274 if (attribute_length != 2) {
3275 classfile_parse_error(
3276 "Wrong Signature attribute length %u in class file %s",
3277 attribute_length, CHECK);
3278 }
3279 parse_classfile_signature_attribute(cfs, CHECK);
3280 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3281 if (runtime_visible_annotations != NULL) {
3282 classfile_parse_error(
3283 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3284 }
3285 runtime_visible_annotations_length = attribute_length;
3286 runtime_visible_annotations = cfs->get_u1_buffer();
3287 assert(runtime_visible_annotations != NULL, "null visible annotations");
3288 parse_annotations(cp,
3289 runtime_visible_annotations,
3290 runtime_visible_annotations_length,
3291 parsed_annotations,
3292 _loader_data,
3293 CHECK);
3294 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
3295 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3296 if (runtime_invisible_annotations_exists) {
3297 classfile_parse_error(
3298 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3299 }
3300 runtime_invisible_annotations_exists = true;
3301 if (PreserveAllAnnotations) {
3302 runtime_invisible_annotations_length = attribute_length;
3303 runtime_invisible_annotations = cfs->get_u1_buffer();
3304 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3305 }
3306 cfs->skip_u1(attribute_length, CHECK);
3307 } else if (tag == vmSymbols::tag_enclosing_method()) {
3308 if (parsed_enclosingmethod_attribute) {
3309 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3310 } else {
3311 parsed_enclosingmethod_attribute = true;
3312 }
3313 guarantee_property(attribute_length == 4,
3314 "Wrong EnclosingMethod attribute length %u in class file %s",
3315 attribute_length, CHECK);
3316 cfs->guarantee_more(4, CHECK); // class_index, method_index
3317 enclosing_method_class_index = cfs->get_u2_fast();
3318 enclosing_method_method_index = cfs->get_u2_fast();
3319 if (enclosing_method_class_index == 0) {
3320 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3321 }
3322 // Validate the constant pool indices and types
3323 check_property(valid_klass_reference_at(enclosing_method_class_index),
3324 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3325 if (enclosing_method_method_index != 0 &&
3326 (!cp->is_within_bounds(enclosing_method_method_index) ||
3327 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3328 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3329 }
3330 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3331 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3332 if (parsed_bootstrap_methods_attribute) {
3333 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3334 }
3335 parsed_bootstrap_methods_attribute = true;
3336 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3337 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3338 if (runtime_visible_type_annotations != NULL) {
3339 classfile_parse_error(
3340 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3341 }
3342 runtime_visible_type_annotations_length = attribute_length;
3343 runtime_visible_type_annotations = cfs->get_u1_buffer();
3344 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3345 // No need for the VM to parse Type annotations
3346 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3347 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3348 if (runtime_invisible_type_annotations_exists) {
3349 classfile_parse_error(
3350 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3351 } else {
3352 runtime_invisible_type_annotations_exists = true;
3353 }
3354 if (PreserveAllAnnotations) {
3355 runtime_invisible_type_annotations_length = attribute_length;
3356 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3357 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3358 }
3359 cfs->skip_u1(attribute_length, CHECK);
3360 } else {
3361 // Unknown attribute
3362 cfs->skip_u1(attribute_length, CHECK);
3363 }
3364 } else {
3365 // Unknown attribute
3366 cfs->skip_u1(attribute_length, CHECK);
3367 }
3368 }
3369 _annotations = assemble_annotations(runtime_visible_annotations,
3370 runtime_visible_annotations_length,
3371 runtime_invisible_annotations,
3372 runtime_invisible_annotations_length,
3373 CHECK);
3374 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3375 runtime_visible_type_annotations_length,
3376 runtime_invisible_type_annotations,
3377 runtime_invisible_type_annotations_length,
3378 CHECK);
3379
3380 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3381 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3382 cfs,
3383 inner_classes_attribute_start,
3384 parsed_innerclasses_attribute,
3385 enclosing_method_class_index,
3386 enclosing_method_method_index,
3387 CHECK);
3388 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3389 guarantee_property(
3390 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3391 "Wrong InnerClasses attribute length in class file %s", CHECK);
3392 }
3393 }
3394
3395 if (_max_bootstrap_specifier_index >= 0) {
3396 guarantee_property(parsed_bootstrap_methods_attribute,
3397 "Missing BootstrapMethods attribute in class file %s", CHECK);
3398 }
3399 }
3400
3401 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3402 assert(k != NULL, "invariant");
3403
3404 if (_synthetic_flag)
3405 k->set_is_synthetic();
3406 if (_sourcefile_index != 0) {
3407 k->set_source_file_name_index(_sourcefile_index);
3408 }
3409 if (_generic_signature_index != 0) {
3410 k->set_generic_signature_index(_generic_signature_index);
3411 }
3412 if (_sde_buffer != NULL) {
3413 k->set_source_debug_extension(_sde_buffer, _sde_length);
3414 }
3415 }
3416
3417 // Create the Annotations object that will
3418 // hold the annotations array for the Klass.
3419 void ClassFileParser::create_combined_annotations(TRAPS) {
3420 if (_annotations == NULL &&
3421 _type_annotations == NULL &&
3422 _fields_annotations == NULL &&
3423 _fields_type_annotations == NULL) {
3424 // Don't create the Annotations object unnecessarily.
3425 return;
3426 }
3427
3428 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3429 annotations->set_class_annotations(_annotations);
3430 annotations->set_class_type_annotations(_type_annotations);
3431 annotations->set_fields_annotations(_fields_annotations);
3432 annotations->set_fields_type_annotations(_fields_type_annotations);
3433
3434 // This is the Annotations object that will be
3435 // assigned to InstanceKlass being constructed.
3436 _combined_annotations = annotations;
3437
3438 // The annotations arrays below has been transfered the
3439 // _combined_annotations so these fields can now be cleared.
3440 _annotations = NULL;
3441 _type_annotations = NULL;
3442 _fields_annotations = NULL;
3443 _fields_type_annotations = NULL;
3444 }
3445
3446 // Transfer ownership of metadata allocated to the InstanceKlass.
3447 void ClassFileParser::apply_parsed_class_metadata(
3448 InstanceKlass* this_klass,
3449 int java_fields_count, TRAPS) {
3450 assert(this_klass != NULL, "invariant");
3451
3452 _cp->set_pool_holder(this_klass);
3453 this_klass->set_constants(_cp);
3454 this_klass->set_fields(_fields, java_fields_count);
3455 this_klass->set_methods(_methods);
3456 this_klass->set_inner_classes(_inner_classes);
3457 this_klass->set_local_interfaces(_local_interfaces);
3458 this_klass->set_transitive_interfaces(_transitive_interfaces);
3459 this_klass->set_annotations(_combined_annotations);
3460
3461 // Clear out these fields so they don't get deallocated by the destructor
3462 clear_class_metadata();
3463 }
3464
3465 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3466 int runtime_visible_annotations_length,
3467 const u1* const runtime_invisible_annotations,
3468 int runtime_invisible_annotations_length,
3469 TRAPS) {
3470 AnnotationArray* annotations = NULL;
3471 if (runtime_visible_annotations != NULL ||
3472 runtime_invisible_annotations != NULL) {
3473 annotations = MetadataFactory::new_array<u1>(_loader_data,
3474 runtime_visible_annotations_length +
3475 runtime_invisible_annotations_length,
3476 CHECK_(annotations));
3477 if (runtime_visible_annotations != NULL) {
3478 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3479 annotations->at_put(i, runtime_visible_annotations[i]);
3480 }
3481 }
3482 if (runtime_invisible_annotations != NULL) {
3483 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3484 int append = runtime_visible_annotations_length+i;
3485 annotations->at_put(append, runtime_invisible_annotations[i]);
3486 }
3487 }
3488 }
3489 return annotations;
3490 }
3491
3492 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3493 const int super_class_index,
3494 const bool need_verify,
3495 TRAPS) {
3496 assert(cp != NULL, "invariant");
3497 const InstanceKlass* super_klass = NULL;
3498
3499 if (super_class_index == 0) {
3500 check_property(_class_name == vmSymbols::java_lang_Object(),
3501 "Invalid superclass index %u in class file %s",
3502 super_class_index,
3503 CHECK_NULL);
3504 } else {
3505 check_property(valid_klass_reference_at(super_class_index),
3506 "Invalid superclass index %u in class file %s",
3507 super_class_index,
3508 CHECK_NULL);
3509 // The class name should be legal because it is checked when parsing constant pool.
3510 // However, make sure it is not an array type.
3511 bool is_array = false;
3512 if (cp->tag_at(super_class_index).is_klass()) {
3513 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3514 if (need_verify)
3515 is_array = super_klass->is_array_klass();
3516 } else if (need_verify) {
3517 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3518 }
3519 if (need_verify) {
3520 guarantee_property(!is_array,
3521 "Bad superclass name in class file %s", CHECK_NULL);
3522 }
3523 }
3524 return super_klass;
3525 }
3526
3527 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3528 unsigned int nonstatic_oop_map_count,
3529 int first_nonstatic_oop_offset) {
3530
3531 unsigned int map_count =
3532 NULL == super ? 0 : super->nonstatic_oop_map_count();
3533 if (nonstatic_oop_map_count > 0) {
3534 // We have oops to add to map
3535 if (map_count == 0) {
3536 map_count = nonstatic_oop_map_count;
3537 }
3538 else {
3539 // Check whether we should add a new map block or whether the last one can
3540 // be extended
3541 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3542 const OopMapBlock* const last_map = first_map + map_count - 1;
3543
3544 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3545 if (next_offset == first_nonstatic_oop_offset) {
3546 // There is no gap bettwen superklass's last oop field and first
3547 // local oop field, merge maps.
3548 nonstatic_oop_map_count -= 1;
3549 }
3550 else {
3551 // Superklass didn't end with a oop field, add extra maps
3552 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3553 }
3554 map_count += nonstatic_oop_map_count;
3555 }
3556 }
3557 return map_count;
3558 }
3559
3560 #ifndef PRODUCT
3561 static void print_field_layout(const Symbol* name,
3562 Array<u2>* fields,
3563 constantPoolHandle cp,
3564 int instance_size,
3565 int instance_fields_start,
3566 int instance_fields_end,
3567 int static_fields_end) {
3568
3569 assert(name != NULL, "invariant");
3570
3571 tty->print("%s: field layout\n", name->as_klass_external_name());
3572 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3573 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3574 if (!fs.access_flags().is_static()) {
3575 tty->print(" @%3d \"%s\" %s\n",
3576 fs.offset(),
3577 fs.name()->as_klass_external_name(),
3578 fs.signature()->as_klass_external_name());
3579 }
3580 }
3581 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3582 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3583 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3584 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3585 if (fs.access_flags().is_static()) {
3586 tty->print(" @%3d \"%s\" %s\n",
3587 fs.offset(),
3588 fs.name()->as_klass_external_name(),
3589 fs.signature()->as_klass_external_name());
3590 }
3591 }
3592 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3593 tty->print("\n");
3594 }
3595 #endif
3596
3597 // Values needed for oopmap and InstanceKlass creation
3598 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3599 public:
3600 int* nonstatic_oop_offsets;
3601 unsigned int* nonstatic_oop_counts;
3602 unsigned int nonstatic_oop_map_count;
3603 unsigned int total_oop_map_count;
3604 int instance_size;
3605 int nonstatic_field_size;
3606 int static_field_size;
3607 bool has_nonstatic_fields;
3608 };
3609
3610 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3611 void ClassFileParser::layout_fields(ConstantPool* cp,
3612 const FieldAllocationCount* fac,
3613 const ClassAnnotationCollector* parsed_annotations,
3614 FieldLayoutInfo* info,
3615 TRAPS) {
3616
3617 assert(cp != NULL, "invariant");
3618
3619 // Field size and offset computation
3620 int nonstatic_field_size = _super_klass == NULL ? 0 :
3621 _super_klass->nonstatic_field_size();
3622
3623 // Count the contended fields by type.
3624 //
3625 // We ignore static fields, because @Contended is not supported for them.
3626 // The layout code below will also ignore the static fields.
3627 int nonstatic_contended_count = 0;
3628 FieldAllocationCount fac_contended;
3629 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3630 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3631 if (fs.is_contended()) {
3632 fac_contended.count[atype]++;
3633 if (!fs.access_flags().is_static()) {
3634 nonstatic_contended_count++;
3635 }
3636 }
3637 }
3638
3639
3640 // Calculate the starting byte offsets
3641 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3642 int next_static_double_offset = next_static_oop_offset +
3643 ((fac->count[STATIC_OOP]) * heapOopSize);
3644 if ( fac->count[STATIC_DOUBLE] &&
3645 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3646 Universe::field_type_should_be_aligned(T_LONG)) ) {
3647 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3648 }
3649
3650 int next_static_word_offset = next_static_double_offset +
3651 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3652 int next_static_short_offset = next_static_word_offset +
3653 ((fac->count[STATIC_WORD]) * BytesPerInt);
3654 int next_static_byte_offset = next_static_short_offset +
3655 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3656
3657 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3658 nonstatic_field_size * heapOopSize;
3659
3660 int next_nonstatic_field_offset = nonstatic_fields_start;
3661
3662 const bool is_contended_class = parsed_annotations->is_contended();
3663
3664 // Class is contended, pad before all the fields
3665 if (is_contended_class) {
3666 next_nonstatic_field_offset += ContendedPaddingWidth;
3667 }
3668
3669 // Compute the non-contended fields count.
3670 // The packing code below relies on these counts to determine if some field
3671 // can be squeezed into the alignment gap. Contended fields are obviously
3672 // exempt from that.
3673 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3674 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3675 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3676 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3677 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3678
3679 // Total non-static fields count, including every contended field
3680 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3681 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3682 fac->count[NONSTATIC_OOP];
3683
3684 const bool super_has_nonstatic_fields =
3685 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3686 const bool has_nonstatic_fields =
3687 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3688
3689
3690 // Prepare list of oops for oop map generation.
3691 //
3692 // "offset" and "count" lists are describing the set of contiguous oop
3693 // regions. offset[i] is the start of the i-th region, which then has
3694 // count[i] oops following. Before we know how many regions are required,
3695 // we pessimistically allocate the maps to fit all the oops into the
3696 // distinct regions.
3697 //
3698 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3699 // to figure out if we still need to do this.
3700 unsigned int nonstatic_oop_map_count = 0;
3701 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3702
3703 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3704 THREAD, int, max_nonstatic_oop_maps);
3705 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3706 THREAD, unsigned int, max_nonstatic_oop_maps);
3707
3708 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3709
3710 bool compact_fields = CompactFields;
3711 int allocation_style = FieldsAllocationStyle;
3712 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3713 assert(false, "0 <= FieldsAllocationStyle <= 2");
3714 allocation_style = 1; // Optimistic
3715 }
3716
3717 // The next classes have predefined hard-coded fields offsets
3718 // (see in JavaClasses::compute_hard_coded_offsets()).
3719 // Use default fields allocation order for them.
3720 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3721 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3722 _class_name == vmSymbols::java_lang_Class() ||
3723 _class_name == vmSymbols::java_lang_ClassLoader() ||
3724 _class_name == vmSymbols::java_lang_ref_Reference() ||
3725 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3726 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3727 _class_name == vmSymbols::java_lang_String() ||
3728 _class_name == vmSymbols::java_lang_Throwable() ||
3729 _class_name == vmSymbols::java_lang_Boolean() ||
3730 _class_name == vmSymbols::java_lang_Character() ||
3731 _class_name == vmSymbols::java_lang_Float() ||
3732 _class_name == vmSymbols::java_lang_Double() ||
3733 _class_name == vmSymbols::java_lang_Byte() ||
3734 _class_name == vmSymbols::java_lang_Short() ||
3735 _class_name == vmSymbols::java_lang_Integer() ||
3736 _class_name == vmSymbols::java_lang_Long())) {
3737 allocation_style = 0; // Allocate oops first
3738 compact_fields = false; // Don't compact fields
3739 }
3740
3741 int next_nonstatic_oop_offset = 0;
3742 int next_nonstatic_double_offset = 0;
3743
3744 // Rearrange fields for a given allocation style
3745 if( allocation_style == 0 ) {
3746 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3747 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3748 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3749 (nonstatic_oop_count * heapOopSize);
3750 } else if( allocation_style == 1 ) {
3751 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3752 next_nonstatic_double_offset = next_nonstatic_field_offset;
3753 } else if( allocation_style == 2 ) {
3754 // Fields allocation: oops fields in super and sub classes are together.
3755 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3756 _super_klass->nonstatic_oop_map_size() > 0 ) {
3757 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3758 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3759 const OopMapBlock* const last_map = first_map + map_count - 1;
3760 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3761 if (next_offset == next_nonstatic_field_offset) {
3762 allocation_style = 0; // allocate oops first
3763 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3764 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3765 (nonstatic_oop_count * heapOopSize);
3766 }
3767 }
3768 if( allocation_style == 2 ) {
3769 allocation_style = 1; // allocate oops last
3770 next_nonstatic_double_offset = next_nonstatic_field_offset;
3771 }
3772 } else {
3773 ShouldNotReachHere();
3774 }
3775
3776 int nonstatic_oop_space_count = 0;
3777 int nonstatic_word_space_count = 0;
3778 int nonstatic_short_space_count = 0;
3779 int nonstatic_byte_space_count = 0;
3780 int nonstatic_oop_space_offset = 0;
3781 int nonstatic_word_space_offset = 0;
3782 int nonstatic_short_space_offset = 0;
3783 int nonstatic_byte_space_offset = 0;
3784
3785 // Try to squeeze some of the fields into the gaps due to
3786 // long/double alignment.
3787 if (nonstatic_double_count > 0) {
3788 int offset = next_nonstatic_double_offset;
3789 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3790 if (compact_fields && offset != next_nonstatic_double_offset) {
3791 // Allocate available fields into the gap before double field.
3792 int length = next_nonstatic_double_offset - offset;
3793 assert(length == BytesPerInt, "");
3794 nonstatic_word_space_offset = offset;
3795 if (nonstatic_word_count > 0) {
3796 nonstatic_word_count -= 1;
3797 nonstatic_word_space_count = 1; // Only one will fit
3798 length -= BytesPerInt;
3799 offset += BytesPerInt;
3800 }
3801 nonstatic_short_space_offset = offset;
3802 while (length >= BytesPerShort && nonstatic_short_count > 0) {
3803 nonstatic_short_count -= 1;
3804 nonstatic_short_space_count += 1;
3805 length -= BytesPerShort;
3806 offset += BytesPerShort;
3807 }
3808 nonstatic_byte_space_offset = offset;
3809 while (length > 0 && nonstatic_byte_count > 0) {
3810 nonstatic_byte_count -= 1;
3811 nonstatic_byte_space_count += 1;
3812 length -= 1;
3813 }
3814 // Allocate oop field in the gap if there are no other fields for that.
3815 nonstatic_oop_space_offset = offset;
3816 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3817 allocation_style != 0) { // when oop fields not first
3818 nonstatic_oop_count -= 1;
3819 nonstatic_oop_space_count = 1; // Only one will fit
3820 length -= heapOopSize;
3821 offset += heapOopSize;
3822 }
3823 }
3824 }
3825
3826 int next_nonstatic_word_offset = next_nonstatic_double_offset +
3827 (nonstatic_double_count * BytesPerLong);
3828 int next_nonstatic_short_offset = next_nonstatic_word_offset +
3829 (nonstatic_word_count * BytesPerInt);
3830 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3831 (nonstatic_short_count * BytesPerShort);
3832 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3833 nonstatic_byte_count;
3834
3835 // let oops jump before padding with this allocation style
3836 if( allocation_style == 1 ) {
3837 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3838 if( nonstatic_oop_count > 0 ) {
3839 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3840 }
3841 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3842 }
3843
3844 // Iterate over fields again and compute correct offsets.
3845 // The field allocation type was temporarily stored in the offset slot.
3846 // oop fields are located before non-oop fields (static and non-static).
3847 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3848
3849 // skip already laid out fields
3850 if (fs.is_offset_set()) continue;
3851
3852 // contended instance fields are handled below
3853 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3854
3855 int real_offset = 0;
3856 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3857
3858 // pack the rest of the fields
3859 switch (atype) {
3860 case STATIC_OOP:
3861 real_offset = next_static_oop_offset;
3862 next_static_oop_offset += heapOopSize;
3863 break;
3864 case STATIC_BYTE:
3865 real_offset = next_static_byte_offset;
3866 next_static_byte_offset += 1;
3867 break;
3868 case STATIC_SHORT:
3869 real_offset = next_static_short_offset;
3870 next_static_short_offset += BytesPerShort;
3871 break;
3872 case STATIC_WORD:
3873 real_offset = next_static_word_offset;
3874 next_static_word_offset += BytesPerInt;
3875 break;
3876 case STATIC_DOUBLE:
3877 real_offset = next_static_double_offset;
3878 next_static_double_offset += BytesPerLong;
3879 break;
3880 case NONSTATIC_OOP:
3881 if( nonstatic_oop_space_count > 0 ) {
3882 real_offset = nonstatic_oop_space_offset;
3883 nonstatic_oop_space_offset += heapOopSize;
3884 nonstatic_oop_space_count -= 1;
3885 } else {
3886 real_offset = next_nonstatic_oop_offset;
3887 next_nonstatic_oop_offset += heapOopSize;
3888 }
3889
3890 // Record this oop in the oop maps
3891 if( nonstatic_oop_map_count > 0 &&
3892 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3893 real_offset -
3894 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3895 heapOopSize ) {
3896 // This oop is adjacent to the previous one, add to current oop map
3897 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3898 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3899 } else {
3900 // This oop is not adjacent to the previous one, create new oop map
3901 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3902 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3903 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3904 nonstatic_oop_map_count += 1;
3905 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3906 first_nonstatic_oop_offset = real_offset;
3907 }
3908 }
3909 break;
3910 case NONSTATIC_BYTE:
3911 if( nonstatic_byte_space_count > 0 ) {
3912 real_offset = nonstatic_byte_space_offset;
3913 nonstatic_byte_space_offset += 1;
3914 nonstatic_byte_space_count -= 1;
3915 } else {
3916 real_offset = next_nonstatic_byte_offset;
3917 next_nonstatic_byte_offset += 1;
3918 }
3919 break;
3920 case NONSTATIC_SHORT:
3921 if( nonstatic_short_space_count > 0 ) {
3922 real_offset = nonstatic_short_space_offset;
3923 nonstatic_short_space_offset += BytesPerShort;
3924 nonstatic_short_space_count -= 1;
3925 } else {
3926 real_offset = next_nonstatic_short_offset;
3927 next_nonstatic_short_offset += BytesPerShort;
3928 }
3929 break;
3930 case NONSTATIC_WORD:
3931 if( nonstatic_word_space_count > 0 ) {
3932 real_offset = nonstatic_word_space_offset;
3933 nonstatic_word_space_offset += BytesPerInt;
3934 nonstatic_word_space_count -= 1;
3935 } else {
3936 real_offset = next_nonstatic_word_offset;
3937 next_nonstatic_word_offset += BytesPerInt;
3938 }
3939 break;
3940 case NONSTATIC_DOUBLE:
3941 real_offset = next_nonstatic_double_offset;
3942 next_nonstatic_double_offset += BytesPerLong;
3943 break;
3944 default:
3945 ShouldNotReachHere();
3946 }
3947 fs.set_offset(real_offset);
3948 }
3949
3950
3951 // Handle the contended cases.
3952 //
3953 // Each contended field should not intersect the cache line with another contended field.
3954 // In the absence of alignment information, we end up with pessimistically separating
3955 // the fields with full-width padding.
3956 //
3957 // Additionally, this should not break alignment for the fields, so we round the alignment up
3958 // for each field.
3959 if (nonstatic_contended_count > 0) {
3960
3961 // if there is at least one contended field, we need to have pre-padding for them
3962 next_nonstatic_padded_offset += ContendedPaddingWidth;
3963
3964 // collect all contended groups
3965 ResourceBitMap bm(cp->size());
3966 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3967 // skip already laid out fields
3968 if (fs.is_offset_set()) continue;
3969
3970 if (fs.is_contended()) {
3971 bm.set_bit(fs.contended_group());
3972 }
3973 }
3974
3975 int current_group = -1;
3976 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3977
3978 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3979
3980 // skip already laid out fields
3981 if (fs.is_offset_set()) continue;
3982
3983 // skip non-contended fields and fields from different group
3984 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3985
3986 // handle statics below
3987 if (fs.access_flags().is_static()) continue;
3988
3989 int real_offset = 0;
3990 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3991
3992 switch (atype) {
3993 case NONSTATIC_BYTE:
3994 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
3995 real_offset = next_nonstatic_padded_offset;
3996 next_nonstatic_padded_offset += 1;
3997 break;
3998
3999 case NONSTATIC_SHORT:
4000 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
4001 real_offset = next_nonstatic_padded_offset;
4002 next_nonstatic_padded_offset += BytesPerShort;
4003 break;
4004
4005 case NONSTATIC_WORD:
4006 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4007 real_offset = next_nonstatic_padded_offset;
4008 next_nonstatic_padded_offset += BytesPerInt;
4009 break;
4010
4011 case NONSTATIC_DOUBLE:
4012 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4013 real_offset = next_nonstatic_padded_offset;
4014 next_nonstatic_padded_offset += BytesPerLong;
4015 break;
4016
4017 case NONSTATIC_OOP:
4018 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4019 real_offset = next_nonstatic_padded_offset;
4020 next_nonstatic_padded_offset += heapOopSize;
4021
4022 // Record this oop in the oop maps
4023 if( nonstatic_oop_map_count > 0 &&
4024 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4025 real_offset -
4026 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4027 heapOopSize ) {
4028 // This oop is adjacent to the previous one, add to current oop map
4029 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4030 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4031 } else {
4032 // This oop is not adjacent to the previous one, create new oop map
4033 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4034 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4035 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4036 nonstatic_oop_map_count += 1;
4037 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4038 first_nonstatic_oop_offset = real_offset;
4039 }
4040 }
4041 break;
4042
4043 default:
4044 ShouldNotReachHere();
4045 }
4046
4047 if (fs.contended_group() == 0) {
4048 // Contended group defines the equivalence class over the fields:
4049 // the fields within the same contended group are not inter-padded.
4050 // The only exception is default group, which does not incur the
4051 // equivalence, and so requires intra-padding.
4052 next_nonstatic_padded_offset += ContendedPaddingWidth;
4053 }
4054
4055 fs.set_offset(real_offset);
4056 } // for
4057
4058 // Start laying out the next group.
4059 // Note that this will effectively pad the last group in the back;
4060 // this is expected to alleviate memory contention effects for
4061 // subclass fields and/or adjacent object.
4062 // If this was the default group, the padding is already in place.
4063 if (current_group != 0) {
4064 next_nonstatic_padded_offset += ContendedPaddingWidth;
4065 }
4066 }
4067
4068 // handle static fields
4069 }
4070
4071 // Entire class is contended, pad in the back.
4072 // This helps to alleviate memory contention effects for subclass fields
4073 // and/or adjacent object.
4074 if (is_contended_class) {
4075 next_nonstatic_padded_offset += ContendedPaddingWidth;
4076 }
4077
4078 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4079
4080 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
4081 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4082 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
4083
4084 int static_field_size = (static_fields_end -
4085 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4086 nonstatic_field_size = nonstatic_field_size +
4087 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4088
4089 int instance_size = align_object_size(instance_end / wordSize);
4090
4091 assert(instance_size == align_object_size(align_size_up(
4092 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4093 wordSize) / wordSize), "consistent layout helper value");
4094
4095 // Invariant: nonstatic_field end/start should only change if there are
4096 // nonstatic fields in the class, or if the class is contended. We compare
4097 // against the non-aligned value, so that end alignment will not fail the
4098 // assert without actually having the fields.
4099 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4100 is_contended_class ||
4101 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4102
4103 // Number of non-static oop map blocks allocated at end of klass.
4104 const unsigned int total_oop_map_count =
4105 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4106 first_nonstatic_oop_offset);
4107
4108 #ifndef PRODUCT
4109 if (PrintFieldLayout) {
4110 print_field_layout(_class_name,
4111 _fields,
4112 cp,
4113 instance_size,
4114 nonstatic_fields_start,
4115 nonstatic_fields_end,
4116 static_fields_end);
4117 }
4118
4119 #endif
4120 // Pass back information needed for InstanceKlass creation
4121 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4122 info->nonstatic_oop_counts = nonstatic_oop_counts;
4123 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4124 info->total_oop_map_count = total_oop_map_count;
4125 info->instance_size = instance_size;
4126 info->static_field_size = static_field_size;
4127 info->nonstatic_field_size = nonstatic_field_size;
4128 info->has_nonstatic_fields = has_nonstatic_fields;
4129 }
4130
4131 static void fill_oop_maps(const InstanceKlass* k,
4132 unsigned int nonstatic_oop_map_count,
4133 const int* nonstatic_oop_offsets,
4134 const unsigned int* nonstatic_oop_counts) {
4135
4136 assert(k != NULL, "invariant");
4137
4138 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4139 const InstanceKlass* const super = k->superklass();
4140 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4141 if (super_count > 0) {
4142 // Copy maps from superklass
4143 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4144 for (unsigned int i = 0; i < super_count; ++i) {
4145 *this_oop_map++ = *super_oop_map++;
4146 }
4147 }
4148
4149 if (nonstatic_oop_map_count > 0) {
4150 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4151 // The counts differ because there is no gap between superklass's last oop
4152 // field and the first local oop field. Extend the last oop map copied
4153 // from the superklass instead of creating new one.
4154 nonstatic_oop_map_count--;
4155 nonstatic_oop_offsets++;
4156 this_oop_map--;
4157 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4158 this_oop_map++;
4159 }
4160
4161 // Add new map blocks, fill them
4162 while (nonstatic_oop_map_count-- > 0) {
4163 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4164 this_oop_map->set_count(*nonstatic_oop_counts++);
4165 this_oop_map++;
4166 }
4167 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4168 this_oop_map, "sanity");
4169 }
4170 }
4171
4172
4173 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4174 assert(ik != NULL, "invariant");
4175
4176 const Klass* const super = ik->super();
4177
4178 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4179 // in which case we don't have to register objects as finalizable
4180 if (!_has_empty_finalizer) {
4181 if (_has_finalizer ||
4182 (super != NULL && super->has_finalizer())) {
4183 ik->set_has_finalizer();
4184 }
4185 }
4186
4187 #ifdef ASSERT
4188 bool f = false;
4189 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4190 vmSymbols::void_method_signature());
4191 if (m != NULL && !m->is_empty_method()) {
4192 f = true;
4193 }
4194
4195 // Spec doesn't prevent agent from redefinition of empty finalizer.
4196 // Despite the fact that it's generally bad idea and redefined finalizer
4197 // will not work as expected we shouldn't abort vm in this case
4198 if (!ik->has_redefined_this_or_super()) {
4199 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4200 }
4201 #endif
4202
4203 // Check if this klass supports the java.lang.Cloneable interface
4204 if (SystemDictionary::Cloneable_klass_loaded()) {
4205 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4206 ik->set_is_cloneable();
4207 }
4208 }
4209
4210 // Check if this klass has a vanilla default constructor
4211 if (super == NULL) {
4212 // java.lang.Object has empty default constructor
4213 ik->set_has_vanilla_constructor();
4214 } else {
4215 if (super->has_vanilla_constructor() &&
4216 _has_vanilla_constructor) {
4217 ik->set_has_vanilla_constructor();
4218 }
4219 #ifdef ASSERT
4220 bool v = false;
4221 if (super->has_vanilla_constructor()) {
4222 const Method* const constructor =
4223 ik->find_method(vmSymbols::object_initializer_name(),
4224 vmSymbols::void_method_signature());
4225 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4226 v = true;
4227 }
4228 }
4229 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4230 #endif
4231 }
4232
4233 // If it cannot be fast-path allocated, set a bit in the layout helper.
4234 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4235 assert(ik->size_helper() > 0, "layout_helper is initialized");
4236 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4237 || ik->is_abstract() || ik->is_interface()
4238 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4239 || ik->size_helper() >= FastAllocateSizeLimit) {
4240 // Forbid fast-path allocation.
4241 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4242 ik->set_layout_helper(lh);
4243 }
4244 }
4245
4246 // Attach super classes and interface classes to class loader data
4247 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4248 TRAPS) {
4249 assert(defined_klass != NULL, "invariant");
4250
4251 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4252 if (defining_loader_data->is_the_null_class_loader_data()) {
4253 // Dependencies to null class loader data are implicit.
4254 return;
4255 } else {
4256 // add super class dependency
4257 Klass* const super = defined_klass->super();
4258 if (super != NULL) {
4259 defining_loader_data->record_dependency(super, CHECK);
4260 }
4261
4262 // add super interface dependencies
4263 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4264 if (local_interfaces != NULL) {
4265 const int length = local_interfaces->length();
4266 for (int i = 0; i < length; i++) {
4267 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4268 }
4269 }
4270 }
4271 }
4272
4273 // utility methods for appending an array with check for duplicates
4274
4275 static void append_interfaces(GrowableArray<Klass*>* result,
4276 const Array<Klass*>* const ifs) {
4277 // iterate over new interfaces
4278 for (int i = 0; i < ifs->length(); i++) {
4279 Klass* const e = ifs->at(i);
4280 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4281 // add new interface
4282 result->append_if_missing(e);
4283 }
4284 }
4285
4286 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4287 Array<Klass*>* local_ifs,
4288 ClassLoaderData* loader_data,
4289 TRAPS) {
4290 assert(local_ifs != NULL, "invariant");
4291 assert(loader_data != NULL, "invariant");
4292
4293 // Compute maximum size for transitive interfaces
4294 int max_transitive_size = 0;
4295 int super_size = 0;
4296 // Add superclass transitive interfaces size
4297 if (super != NULL) {
4298 super_size = super->transitive_interfaces()->length();
4299 max_transitive_size += super_size;
4300 }
4301 // Add local interfaces' super interfaces
4302 const int local_size = local_ifs->length();
4303 for (int i = 0; i < local_size; i++) {
4304 Klass* const l = local_ifs->at(i);
4305 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4306 }
4307 // Finally add local interfaces
4308 max_transitive_size += local_size;
4309 // Construct array
4310 if (max_transitive_size == 0) {
4311 // no interfaces, use canonicalized array
4312 return Universe::the_empty_klass_array();
4313 } else if (max_transitive_size == super_size) {
4314 // no new local interfaces added, share superklass' transitive interface array
4315 return super->transitive_interfaces();
4316 } else if (max_transitive_size == local_size) {
4317 // only local interfaces added, share local interface array
4318 return local_ifs;
4319 } else {
4320 ResourceMark rm;
4321 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4322
4323 // Copy down from superclass
4324 if (super != NULL) {
4325 append_interfaces(result, super->transitive_interfaces());
4326 }
4327
4328 // Copy down from local interfaces' superinterfaces
4329 for (int i = 0; i < local_size; i++) {
4330 Klass* const l = local_ifs->at(i);
4331 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4332 }
4333 // Finally add local interfaces
4334 append_interfaces(result, local_ifs);
4335
4336 // length will be less than the max_transitive_size if duplicates were removed
4337 const int length = result->length();
4338 assert(length <= max_transitive_size, "just checking");
4339 Array<Klass*>* const new_result =
4340 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4341 for (int i = 0; i < length; i++) {
4342 Klass* const e = result->at(i);
4343 assert(e != NULL, "just checking");
4344 new_result->at_put(i, e);
4345 }
4346 return new_result;
4347 }
4348 }
4349
4350 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4351 assert(this_klass != NULL, "invariant");
4352 const Klass* const super = this_klass->super();
4353 if (super != NULL) {
4354
4355 // If the loader is not the boot loader then throw an exception if its
4356 // superclass is in package jdk.internal.reflect and its loader is not a
4357 // special reflection class loader
4358 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4359 assert(super->is_instance_klass(), "super is not instance klass");
4360 PackageEntry* super_package = super->package();
4361 if (super_package != NULL &&
4362 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4363 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4364 ResourceMark rm(THREAD);
4365 Exceptions::fthrow(
4366 THREAD_AND_LOCATION,
4367 vmSymbols::java_lang_IllegalAccessError(),
4368 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4369 this_klass->external_name(),
4370 this_klass->class_loader_data()->loader_name(),
4371 super->external_name());
4372 return;
4373 }
4374 }
4375
4376 Reflection::VerifyClassAccessResults vca_result =
4377 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4378 if (vca_result != Reflection::ACCESS_OK) {
4379 ResourceMark rm(THREAD);
4380 char* msg = Reflection::verify_class_access_msg(this_klass,
4381 InstanceKlass::cast(super),
4382 vca_result);
4383 if (msg == NULL) {
4384 Exceptions::fthrow(
4385 THREAD_AND_LOCATION,
4386 vmSymbols::java_lang_IllegalAccessError(),
4387 "class %s cannot access its superclass %s",
4388 this_klass->external_name(),
4389 super->external_name());
4390 } else {
4391 // Add additional message content.
4392 Exceptions::fthrow(
4393 THREAD_AND_LOCATION,
4394 vmSymbols::java_lang_IllegalAccessError(),
4395 "superclass access check failed: %s",
4396 msg);
4397 }
4398 }
4399 }
4400 }
4401
4402
4403 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4404 assert(this_klass != NULL, "invariant");
4405 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4406 const int lng = local_interfaces->length();
4407 for (int i = lng - 1; i >= 0; i--) {
4408 Klass* const k = local_interfaces->at(i);
4409 assert (k != NULL && k->is_interface(), "invalid interface");
4410 Reflection::VerifyClassAccessResults vca_result =
4411 Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false);
4412 if (vca_result != Reflection::ACCESS_OK) {
4413 ResourceMark rm(THREAD);
4414 char* msg = Reflection::verify_class_access_msg(this_klass,
4415 InstanceKlass::cast(k),
4416 vca_result);
4417 if (msg == NULL) {
4418 Exceptions::fthrow(
4419 THREAD_AND_LOCATION,
4420 vmSymbols::java_lang_IllegalAccessError(),
4421 "class %s cannot access its superinterface %s",
4422 this_klass->external_name(),
4423 k->external_name());
4424 } else {
4425 // Add additional message content.
4426 Exceptions::fthrow(
4427 THREAD_AND_LOCATION,
4428 vmSymbols::java_lang_IllegalAccessError(),
4429 "superinterface check failed: %s",
4430 msg);
4431 }
4432 }
4433 }
4434 }
4435
4436
4437 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4438 assert(this_klass != NULL, "invariant");
4439 const Array<Method*>* const methods = this_klass->methods();
4440 const int num_methods = methods->length();
4441
4442 // go thru each method and check if it overrides a final method
4443 for (int index = 0; index < num_methods; index++) {
4444 const Method* const m = methods->at(index);
4445
4446 // skip private, static, and <init> methods
4447 if ((!m->is_private() && !m->is_static()) &&
4448 (m->name() != vmSymbols::object_initializer_name())) {
4449
4450 const Symbol* const name = m->name();
4451 const Symbol* const signature = m->signature();
4452 const Klass* k = this_klass->super();
4453 const Method* super_m = NULL;
4454 while (k != NULL) {
4455 // skip supers that don't have final methods.
4456 if (k->has_final_method()) {
4457 // lookup a matching method in the super class hierarchy
4458 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4459 if (super_m == NULL) {
4460 break; // didn't find any match; get out
4461 }
4462
4463 if (super_m->is_final() && !super_m->is_static() &&
4464 // matching method in super is final, and not static
4465 (Reflection::verify_field_access(this_klass,
4466 super_m->method_holder(),
4467 super_m->method_holder(),
4468 super_m->access_flags(), false))
4469 // this class can access super final method and therefore override
4470 ) {
4471 ResourceMark rm(THREAD);
4472 Exceptions::fthrow(
4473 THREAD_AND_LOCATION,
4474 vmSymbols::java_lang_VerifyError(),
4475 "class %s overrides final method %s.%s%s",
4476 this_klass->external_name(),
4477 super_m->method_holder()->external_name(),
4478 name->as_C_string(),
4479 signature->as_C_string()
4480 );
4481 return;
4482 }
4483
4484 // continue to look from super_m's holder's super.
4485 k = super_m->method_holder()->super();
4486 continue;
4487 }
4488
4489 k = k->super();
4490 }
4491 }
4492 }
4493 }
4494
4495
4496 // assumes that this_klass is an interface
4497 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4498 assert(this_klass != NULL, "invariant");
4499 assert(this_klass->is_interface(), "not an interface");
4500 const Array<Method*>* methods = this_klass->methods();
4501 const int num_methods = methods->length();
4502
4503 for (int index = 0; index < num_methods; index++) {
4504 const Method* const m = methods->at(index);
4505 // if m is static and not the init method, throw a verify error
4506 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4507 ResourceMark rm(THREAD);
4508 Exceptions::fthrow(
4509 THREAD_AND_LOCATION,
4510 vmSymbols::java_lang_VerifyError(),
4511 "Illegal static method %s in interface %s",
4512 m->name()->as_C_string(),
4513 this_klass->external_name()
4514 );
4515 return;
4516 }
4517 }
4518 }
4519
4520 // utility methods for format checking
4521
4522 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4523 if (!_need_verify) { return; }
4524
4525 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4526 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4527 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4528 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4529 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4530 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4531 const bool is_module_info= (flags & JVM_ACC_MODULE) != 0;
4532 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4533
4534 if ((is_abstract && is_final) ||
4535 (is_interface && !is_abstract) ||
4536 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4537 (!is_interface && major_gte_15 && is_annotation) ||
4538 is_module_info) {
4539 ResourceMark rm(THREAD);
4540 Exceptions::fthrow(
4541 THREAD_AND_LOCATION,
4542 vmSymbols::java_lang_ClassFormatError(),
4543 "Illegal class modifiers in class %s: 0x%X",
4544 _class_name->as_C_string(), flags
4545 );
4546 return;
4547 }
4548 }
4549
4550 static bool has_illegal_visibility(jint flags) {
4551 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4552 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4553 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4554
4555 return ((is_public && is_protected) ||
4556 (is_public && is_private) ||
4557 (is_protected && is_private));
4558 }
4559
4560 static bool is_supported_version(u2 major, u2 minor){
4561 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4562 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4563 (major <= max_version) &&
4564 ((major != max_version) ||
4565 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4566 }
4567
4568 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4569 bool is_interface,
4570 TRAPS) const {
4571 if (!_need_verify) { return; }
4572
4573 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4574 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4575 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4576 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4577 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4578 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4579 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4580 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4581 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4582
4583 bool is_illegal = false;
4584
4585 if (is_interface) {
4586 if (!is_public || !is_static || !is_final || is_private ||
4587 is_protected || is_volatile || is_transient ||
4588 (major_gte_15 && is_enum)) {
4589 is_illegal = true;
4590 }
4591 } else { // not interface
4592 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4593 is_illegal = true;
4594 }
4595 }
4596
4597 if (is_illegal) {
4598 ResourceMark rm(THREAD);
4599 Exceptions::fthrow(
4600 THREAD_AND_LOCATION,
4601 vmSymbols::java_lang_ClassFormatError(),
4602 "Illegal field modifiers in class %s: 0x%X",
4603 _class_name->as_C_string(), flags);
4604 return;
4605 }
4606 }
4607
4608 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4609 bool is_interface,
4610 const Symbol* name,
4611 TRAPS) const {
4612 if (!_need_verify) { return; }
4613
4614 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4615 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4616 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4617 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4618 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4619 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4620 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4621 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4622 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4623 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4624 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4625 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4626 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4627
4628 bool is_illegal = false;
4629
4630 if (is_interface) {
4631 if (major_gte_8) {
4632 // Class file version is JAVA_8_VERSION or later Methods of
4633 // interfaces may set any of the flags except ACC_PROTECTED,
4634 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4635 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4636 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4637 (is_native || is_protected || is_final || is_synchronized) ||
4638 // If a specific method of a class or interface has its
4639 // ACC_ABSTRACT flag set, it must not have any of its
4640 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4641 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4642 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4643 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4644 (is_abstract && (is_private || is_static || is_strict))) {
4645 is_illegal = true;
4646 }
4647 } else if (major_gte_15) {
4648 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4649 if (!is_public || is_private || is_protected || is_static || is_final ||
4650 is_synchronized || is_native || !is_abstract || is_strict) {
4651 is_illegal = true;
4652 }
4653 } else {
4654 // Class file version is pre-JAVA_1_5_VERSION
4655 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4656 is_illegal = true;
4657 }
4658 }
4659 } else { // not interface
4660 if (has_illegal_visibility(flags)) {
4661 is_illegal = true;
4662 } else {
4663 if (is_initializer) {
4664 if (is_static || is_final || is_synchronized || is_native ||
4665 is_abstract || (major_gte_15 && is_bridge)) {
4666 is_illegal = true;
4667 }
4668 } else { // not initializer
4669 if (is_abstract) {
4670 if ((is_final || is_native || is_private || is_static ||
4671 (major_gte_15 && (is_synchronized || is_strict)))) {
4672 is_illegal = true;
4673 }
4674 }
4675 }
4676 }
4677 }
4678
4679 if (is_illegal) {
4680 ResourceMark rm(THREAD);
4681 Exceptions::fthrow(
4682 THREAD_AND_LOCATION,
4683 vmSymbols::java_lang_ClassFormatError(),
4684 "Method %s in class %s has illegal modifiers: 0x%X",
4685 name->as_C_string(), _class_name->as_C_string(), flags);
4686 return;
4687 }
4688 }
4689
4690 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4691 int length,
4692 TRAPS) const {
4693 assert(_need_verify, "only called when _need_verify is true");
4694 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4695 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4696 }
4697 }
4698
4699 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4700 // In class names, '/' separates unqualified names. This is verified in this function also.
4701 // Method names also may not contain the characters '<' or '>', unless <init>
4702 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4703 // method. Because these names have been checked as special cases before
4704 // calling this method in verify_legal_method_name.
4705 //
4706 // This method is also called from the modular system APIs in modules.cpp
4707 // to verify the validity of module and package names.
4708 bool ClassFileParser::verify_unqualified_name(const char* name,
4709 unsigned int length,
4710 int type) {
4711 for (const char* p = name; p != name + length;) {
4712 jchar ch = *p;
4713 if (ch < 128) {
4714 if (ch == '.' || ch == ';' || ch == '[' ) {
4715 return false; // do not permit '.', ';', or '['
4716 }
4717 if (ch == '/') {
4718 // check for '//' or leading or trailing '/' which are not legal
4719 // unqualified name must not be empty
4720 if (type == ClassFileParser::LegalClass) {
4721 if (p == name || p+1 >= name+length || *(p+1) == '/') {
4722 return false;
4723 }
4724 } else {
4725 return false; // do not permit '/' unless it's class name
4726 }
4727 }
4728 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
4729 return false; // do not permit '<' or '>' in method names
4730 }
4731 p++;
4732 } else {
4733 char* tmp_p = UTF8::next(p, &ch);
4734 p = tmp_p;
4735 }
4736 }
4737 return true;
4738 }
4739
4740 // Take pointer to a string. Skip over the longest part of the string that could
4741 // be taken as a fieldname. Allow '/' if slash_ok is true.
4742 // Return a pointer to just past the fieldname.
4743 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4744 // being true, we saw consecutive slashes (meaning we were looking for a
4745 // qualified path but found something that was badly-formed).
4746 static const char* skip_over_field_name(const char* name,
4747 bool slash_ok,
4748 unsigned int length) {
4749 const char* p;
4750 jboolean last_is_slash = false;
4751 jboolean not_first_ch = false;
4752
4753 for (p = name; p != name + length; not_first_ch = true) {
4754 const char* old_p = p;
4755 jchar ch = *p;
4756 if (ch < 128) {
4757 p++;
4758 // quick check for ascii
4759 if ((ch >= 'a' && ch <= 'z') ||
4760 (ch >= 'A' && ch <= 'Z') ||
4761 (ch == '_' || ch == '$') ||
4762 (not_first_ch && ch >= '0' && ch <= '9')) {
4763 last_is_slash = false;
4764 continue;
4765 }
4766 if (slash_ok && ch == '/') {
4767 if (last_is_slash) {
4768 return NULL; // Don't permit consecutive slashes
4769 }
4770 last_is_slash = true;
4771 continue;
4772 }
4773 }
4774 else {
4775 jint unicode_ch;
4776 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4777 p = tmp_p;
4778 last_is_slash = false;
4779 // Check if ch is Java identifier start or is Java identifier part
4780 // 4672820: call java.lang.Character methods directly without generating separate tables.
4781 EXCEPTION_MARK;
4782
4783 // return value
4784 JavaValue result(T_BOOLEAN);
4785 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4786 JavaCallArguments args;
4787 args.push_int(unicode_ch);
4788
4789 // public static boolean isJavaIdentifierStart(char ch);
4790 JavaCalls::call_static(&result,
4791 SystemDictionary::Character_klass(),
4792 vmSymbols::isJavaIdentifierStart_name(),
4793 vmSymbols::int_bool_signature(),
4794 &args,
4795 THREAD);
4796
4797 if (HAS_PENDING_EXCEPTION) {
4798 CLEAR_PENDING_EXCEPTION;
4799 return 0;
4800 }
4801 if (result.get_jboolean()) {
4802 continue;
4803 }
4804
4805 if (not_first_ch) {
4806 // public static boolean isJavaIdentifierPart(char ch);
4807 JavaCalls::call_static(&result,
4808 SystemDictionary::Character_klass(),
4809 vmSymbols::isJavaIdentifierPart_name(),
4810 vmSymbols::int_bool_signature(),
4811 &args,
4812 THREAD);
4813
4814 if (HAS_PENDING_EXCEPTION) {
4815 CLEAR_PENDING_EXCEPTION;
4816 return 0;
4817 }
4818
4819 if (result.get_jboolean()) {
4820 continue;
4821 }
4822 }
4823 }
4824 return (not_first_ch) ? old_p : NULL;
4825 }
4826 return (not_first_ch) ? p : NULL;
4827 }
4828
4829 // Take pointer to a string. Skip over the longest part of the string that could
4830 // be taken as a field signature. Allow "void" if void_ok.
4831 // Return a pointer to just past the signature.
4832 // Return NULL if no legal signature is found.
4833 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4834 bool void_ok,
4835 unsigned int length,
4836 TRAPS) const {
4837 unsigned int array_dim = 0;
4838 while (length > 0) {
4839 switch (signature[0]) {
4840 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4841 case JVM_SIGNATURE_BOOLEAN:
4842 case JVM_SIGNATURE_BYTE:
4843 case JVM_SIGNATURE_CHAR:
4844 case JVM_SIGNATURE_SHORT:
4845 case JVM_SIGNATURE_INT:
4846 case JVM_SIGNATURE_FLOAT:
4847 case JVM_SIGNATURE_LONG:
4848 case JVM_SIGNATURE_DOUBLE:
4849 return signature + 1;
4850 case JVM_SIGNATURE_CLASS: {
4851 if (_major_version < JAVA_1_5_VERSION) {
4852 // Skip over the class name if one is there
4853 const char* const p = skip_over_field_name(signature + 1, true, --length);
4854
4855 // The next character better be a semicolon
4856 if (p && (p - signature) > 1 && p[0] == ';') {
4857 return p + 1;
4858 }
4859 }
4860 else {
4861 // Skip leading 'L' and ignore first appearance of ';'
4862 length--;
4863 signature++;
4864 char* c = strchr((char*) signature, ';');
4865 // Format check signature
4866 if (c != NULL) {
4867 ResourceMark rm(THREAD);
4868 int newlen = c - (char*) signature;
4869 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
4870 strncpy(sig, signature, newlen);
4871 sig[newlen] = '\0';
4872
4873 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
4874 if (!legal) {
4875 classfile_parse_error("Class name contains illegal character "
4876 "in descriptor in class file %s",
4877 CHECK_0);
4878 return NULL;
4879 }
4880 return signature + newlen + 1;
4881 }
4882 }
4883 return NULL;
4884 }
4885 case JVM_SIGNATURE_ARRAY:
4886 array_dim++;
4887 if (array_dim > 255) {
4888 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4889 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4890 }
4891 // The rest of what's there better be a legal signature
4892 signature++;
4893 length--;
4894 void_ok = false;
4895 break;
4896 default:
4897 return NULL;
4898 }
4899 }
4900 return NULL;
4901 }
4902
4903 // Checks if name is a legal class name.
4904 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4905 if (!_need_verify || _relax_verify) { return; }
4906
4907 char buf[fixed_buffer_size];
4908 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4909 unsigned int length = name->utf8_length();
4910 bool legal = false;
4911
4912 if (length > 0) {
4913 const char* p;
4914 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4915 p = skip_over_field_signature(bytes, false, length, CHECK);
4916 legal = (p != NULL) && ((p - bytes) == (int)length);
4917 } else if (_major_version < JAVA_1_5_VERSION) {
4918 if (bytes[0] != '<') {
4919 p = skip_over_field_name(bytes, true, length);
4920 legal = (p != NULL) && ((p - bytes) == (int)length);
4921 }
4922 } else {
4923 // 4900761: relax the constraints based on JSR202 spec
4924 // Class names may be drawn from the entire Unicode character set.
4925 // Identifiers between '/' must be unqualified names.
4926 // The utf8 string has been verified when parsing cpool entries.
4927 legal = verify_unqualified_name(bytes, length, LegalClass);
4928 }
4929 }
4930 if (!legal) {
4931 ResourceMark rm(THREAD);
4932 assert(_class_name != NULL, "invariant");
4933 Exceptions::fthrow(
4934 THREAD_AND_LOCATION,
4935 vmSymbols::java_lang_ClassFormatError(),
4936 "Illegal class name \"%s\" in class file %s", bytes,
4937 _class_name->as_C_string()
4938 );
4939 return;
4940 }
4941 }
4942
4943 // Checks if name is a legal field name.
4944 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4945 if (!_need_verify || _relax_verify) { return; }
4946
4947 char buf[fixed_buffer_size];
4948 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4949 unsigned int length = name->utf8_length();
4950 bool legal = false;
4951
4952 if (length > 0) {
4953 if (_major_version < JAVA_1_5_VERSION) {
4954 if (bytes[0] != '<') {
4955 const char* p = skip_over_field_name(bytes, false, length);
4956 legal = (p != NULL) && ((p - bytes) == (int)length);
4957 }
4958 } else {
4959 // 4881221: relax the constraints based on JSR202 spec
4960 legal = verify_unqualified_name(bytes, length, LegalField);
4961 }
4962 }
4963
4964 if (!legal) {
4965 ResourceMark rm(THREAD);
4966 assert(_class_name != NULL, "invariant");
4967 Exceptions::fthrow(
4968 THREAD_AND_LOCATION,
4969 vmSymbols::java_lang_ClassFormatError(),
4970 "Illegal field name \"%s\" in class %s", bytes,
4971 _class_name->as_C_string()
4972 );
4973 return;
4974 }
4975 }
4976
4977 // Checks if name is a legal method name.
4978 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4979 if (!_need_verify || _relax_verify) { return; }
4980
4981 assert(name != NULL, "method name is null");
4982 char buf[fixed_buffer_size];
4983 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4984 unsigned int length = name->utf8_length();
4985 bool legal = false;
4986
4987 if (length > 0) {
4988 if (bytes[0] == '<') {
4989 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4990 legal = true;
4991 }
4992 } else if (_major_version < JAVA_1_5_VERSION) {
4993 const char* p;
4994 p = skip_over_field_name(bytes, false, length);
4995 legal = (p != NULL) && ((p - bytes) == (int)length);
4996 } else {
4997 // 4881221: relax the constraints based on JSR202 spec
4998 legal = verify_unqualified_name(bytes, length, LegalMethod);
4999 }
5000 }
5001
5002 if (!legal) {
5003 ResourceMark rm(THREAD);
5004 assert(_class_name != NULL, "invariant");
5005 Exceptions::fthrow(
5006 THREAD_AND_LOCATION,
5007 vmSymbols::java_lang_ClassFormatError(),
5008 "Illegal method name \"%s\" in class %s", bytes,
5009 _class_name->as_C_string()
5010 );
5011 return;
5012 }
5013 }
5014
5015
5016 // Checks if signature is a legal field signature.
5017 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5018 const Symbol* signature,
5019 TRAPS) const {
5020 if (!_need_verify) { return; }
5021
5022 char buf[fixed_buffer_size];
5023 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5024 const unsigned int length = signature->utf8_length();
5025 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5026
5027 if (p == NULL || (p - bytes) != (int)length) {
5028 throwIllegalSignature("Field", name, signature, CHECK);
5029 }
5030 }
5031
5032 // Checks if signature is a legal method signature.
5033 // Returns number of parameters
5034 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5035 const Symbol* signature,
5036 TRAPS) const {
5037 if (!_need_verify) {
5038 // make sure caller's args_size will be less than 0 even for non-static
5039 // method so it will be recomputed in compute_size_of_parameters().
5040 return -2;
5041 }
5042
5043 // Class initializers cannot have args for class format version >= 51.
5044 if (name == vmSymbols::class_initializer_name() &&
5045 signature != vmSymbols::void_method_signature() &&
5046 _major_version >= JAVA_7_VERSION) {
5047 throwIllegalSignature("Method", name, signature, CHECK_0);
5048 return 0;
5049 }
5050
5051 unsigned int args_size = 0;
5052 char buf[fixed_buffer_size];
5053 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5054 unsigned int length = signature->utf8_length();
5055 const char* nextp;
5056
5057 // The first character must be a '('
5058 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5059 length--;
5060 // Skip over legal field signatures
5061 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5062 while ((length > 0) && (nextp != NULL)) {
5063 args_size++;
5064 if (p[0] == 'J' || p[0] == 'D') {
5065 args_size++;
5066 }
5067 length -= nextp - p;
5068 p = nextp;
5069 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5070 }
5071 // The first non-signature thing better be a ')'
5072 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5073 length--;
5074 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5075 // All internal methods must return void
5076 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5077 return args_size;
5078 }
5079 } else {
5080 // Now we better just have a return value
5081 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5082 if (nextp && ((int)length == (nextp - p))) {
5083 return args_size;
5084 }
5085 }
5086 }
5087 }
5088 // Report error
5089 throwIllegalSignature("Method", name, signature, CHECK_0);
5090 return 0;
5091 }
5092
5093 int ClassFileParser::static_field_size() const {
5094 assert(_field_info != NULL, "invariant");
5095 return _field_info->static_field_size;
5096 }
5097
5098 int ClassFileParser::total_oop_map_count() const {
5099 assert(_field_info != NULL, "invariant");
5100 return _field_info->total_oop_map_count;
5101 }
5102
5103 jint ClassFileParser::layout_size() const {
5104 assert(_field_info != NULL, "invariant");
5105 return _field_info->instance_size;
5106 }
5107
5108 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5109 const Array<Method*>* methods) {
5110 assert(ik != NULL, "invariant");
5111 assert(methods != NULL, "invariant");
5112
5113 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5114 // (We used to do this lazily, but now we query it in Rewriter,
5115 // which is eagerly done for every method, so we might as well do it now,
5116 // when everything is fresh in memory.)
5117 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5118
5119 if (klass_id != vmSymbols::NO_SID) {
5120 for (int j = 0; j < methods->length(); ++j) {
5121 Method* method = methods->at(j);
5122 method->init_intrinsic_id();
5123
5124 if (CheckIntrinsics) {
5125 // Check if an intrinsic is defined for method 'method',
5126 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5127 if (method->intrinsic_id() != vmIntrinsics::_none &&
5128 !method->intrinsic_candidate()) {
5129 tty->print("Compiler intrinsic is defined for method [%s], "
5130 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5131 method->name_and_sig_as_C_string(),
5132 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5133 );
5134 tty->cr();
5135 DEBUG_ONLY(vm_exit(1));
5136 }
5137 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5138 // but there is no intrinsic available for it.
5139 if (method->intrinsic_candidate() &&
5140 method->intrinsic_id() == vmIntrinsics::_none) {
5141 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5142 "but no compiler intrinsic is defined for the method.%s",
5143 method->name_and_sig_as_C_string(),
5144 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5145 );
5146 tty->cr();
5147 DEBUG_ONLY(vm_exit(1));
5148 }
5149 }
5150 } // end for
5151
5152 #ifdef ASSERT
5153 if (CheckIntrinsics) {
5154 // Check for orphan methods in the current class. A method m
5155 // of a class C is orphan if an intrinsic is defined for method m,
5156 // but class C does not declare m.
5157 // The check is potentially expensive, therefore it is available
5158 // only in debug builds.
5159
5160 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5161 if (vmIntrinsics::_compiledLambdaForm == id) {
5162 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5163 // generated for the JVM from a LambdaForm and therefore no method
5164 // is defined for it.
5165 continue;
5166 }
5167
5168 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5169 // Check if the current class contains a method with the same
5170 // name, flags, signature.
5171 bool match = false;
5172 for (int j = 0; j < methods->length(); ++j) {
5173 const Method* method = methods->at(j);
5174 if (method->intrinsic_id() == id) {
5175 match = true;
5176 break;
5177 }
5178 }
5179
5180 if (!match) {
5181 char buf[1000];
5182 tty->print("Compiler intrinsic is defined for method [%s], "
5183 "but the method is not available in class [%s].%s",
5184 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5185 buf, sizeof(buf)),
5186 ik->name()->as_C_string(),
5187 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5188 );
5189 tty->cr();
5190 DEBUG_ONLY(vm_exit(1));
5191 }
5192 }
5193 } // end for
5194 } // CheckIntrinsics
5195 #endif // ASSERT
5196 }
5197 }
5198
5199 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5200 if (_klass != NULL) {
5201 return _klass;
5202 }
5203
5204 InstanceKlass* const ik =
5205 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5206
5207 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5208
5209 assert(_klass == ik, "invariant");
5210
5211 ik->set_has_passed_fingerprint_check(false);
5212 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5213 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5214 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5215 // This class matches with a class saved in an AOT library
5216 ik->set_has_passed_fingerprint_check(true);
5217 } else {
5218 ResourceMark rm;
5219 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5220 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5221 }
5222 }
5223
5224 return ik;
5225 }
5226
5227 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5228 assert(ik != NULL, "invariant");
5229
5230 set_klass_to_deallocate(ik);
5231
5232 assert(_field_info != NULL, "invariant");
5233 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5234 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5235 "sanity");
5236
5237 assert(ik->is_instance_klass(), "sanity");
5238 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5239
5240 // Fill in information already parsed
5241 ik->set_should_verify_class(_need_verify);
5242
5243 // Not yet: supers are done below to support the new subtype-checking fields
5244 ik->set_class_loader_data(_loader_data);
5245 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5246 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5247 assert(_fac != NULL, "invariant");
5248 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5249
5250 // this transfers ownership of a lot of arrays from
5251 // the parser onto the InstanceKlass*
5252 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5253
5254 // note that is not safe to use the fields in the parser from this point on
5255 assert(NULL == _cp, "invariant");
5256 assert(NULL == _fields, "invariant");
5257 assert(NULL == _methods, "invariant");
5258 assert(NULL == _inner_classes, "invariant");
5259 assert(NULL == _local_interfaces, "invariant");
5260 assert(NULL == _transitive_interfaces, "invariant");
5261 assert(NULL == _combined_annotations, "invariant");
5262
5263 if (_has_final_method) {
5264 ik->set_has_final_method();
5265 }
5266
5267 ik->copy_method_ordering(_method_ordering, CHECK);
5268 // The InstanceKlass::_methods_jmethod_ids cache
5269 // is managed on the assumption that the initial cache
5270 // size is equal to the number of methods in the class. If
5271 // that changes, then InstanceKlass::idnum_can_increment()
5272 // has to be changed accordingly.
5273 ik->set_initial_method_idnum(ik->methods()->length());
5274
5275 ik->set_name(_class_name);
5276
5277 if (is_anonymous()) {
5278 // I am well known to myself
5279 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve
5280 }
5281
5282 ik->set_minor_version(_minor_version);
5283 ik->set_major_version(_major_version);
5284 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5285 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5286
5287 if (_host_klass != NULL) {
5288 assert (ik->is_anonymous(), "should be the same");
5289 ik->set_host_klass(_host_klass);
5290 }
5291
5292 // Set PackageEntry for this_klass
5293 oop cl = ik->class_loader();
5294 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5295 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5296 ik->set_package(cld, CHECK);
5297
5298 const Array<Method*>* const methods = ik->methods();
5299 assert(methods != NULL, "invariant");
5300 const int methods_len = methods->length();
5301
5302 check_methods_for_intrinsics(ik, methods);
5303
5304 // Fill in field values obtained by parse_classfile_attributes
5305 if (_parsed_annotations->has_any_annotations()) {
5306 _parsed_annotations->apply_to(ik);
5307 }
5308
5309 apply_parsed_class_attributes(ik);
5310
5311 // Miranda methods
5312 if ((_num_miranda_methods > 0) ||
5313 // if this class introduced new miranda methods or
5314 (_super_klass != NULL && _super_klass->has_miranda_methods())
5315 // super class exists and this class inherited miranda methods
5316 ) {
5317 ik->set_has_miranda_methods(); // then set a flag
5318 }
5319
5320 // Fill in information needed to compute superclasses.
5321 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5322
5323 // Initialize itable offset tables
5324 klassItable::setup_itable_offset_table(ik);
5325
5326 // Compute transitive closure of interfaces this class implements
5327 // Do final class setup
5328 fill_oop_maps(ik,
5329 _field_info->nonstatic_oop_map_count,
5330 _field_info->nonstatic_oop_offsets,
5331 _field_info->nonstatic_oop_counts);
5332
5333 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5334 set_precomputed_flags(ik);
5335
5336 // check if this class can access its super class
5337 check_super_class_access(ik, CHECK);
5338
5339 // check if this class can access its superinterfaces
5340 check_super_interface_access(ik, CHECK);
5341
5342 // check if this class overrides any final method
5343 check_final_method_override(ik, CHECK);
5344
5345 // reject static interface methods prior to Java 8
5346 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5347 check_illegal_static_method(ik, CHECK);
5348 }
5349
5350 // Obtain this_klass' module entry
5351 ModuleEntry* module_entry = ik->module();
5352 assert(module_entry != NULL, "module_entry should always be set");
5353
5354 // Obtain java.lang.reflect.Module
5355 Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module()));
5356
5357 // Allocate mirror and initialize static fields
5358 // The create_mirror() call will also call compute_modifiers()
5359 java_lang_Class::create_mirror(ik,
5360 _loader_data->class_loader(),
5361 module_handle,
5362 _protection_domain,
5363 CHECK);
5364
5365 assert(_all_mirandas != NULL, "invariant");
5366
5367 // Generate any default methods - default methods are public interface methods
5368 // that have a default implementation. This is new with Java 8.
5369 if (_has_nonstatic_concrete_methods) {
5370 DefaultMethods::generate_default_methods(ik,
5371 _all_mirandas,
5372 CHECK);
5373 }
5374
5375 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5376 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5377 !module_entry->has_default_read_edges()) {
5378 if (!module_entry->set_has_default_read_edges()) {
5379 // We won a potential race
5380 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5381 }
5382 }
5383
5384 // Update the loader_data graph.
5385 record_defined_class_dependencies(ik, CHECK);
5386
5387 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5388
5389 if (!is_internal()) {
5390 if (log_is_enabled(Info, class, load)) {
5391 ResourceMark rm;
5392 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5393
5394 if (log_is_enabled(Info, class, load)) {
5395 ik->print_loading_log(LogLevel::Info, _loader_data, module_name, _stream);
5396 }
5397 // No 'else' here as logging levels are not mutually exclusive
5398 if (log_is_enabled(Debug, class, load)) {
5399 ik->print_loading_log(LogLevel::Debug, _loader_data, module_name, _stream);
5400 }
5401 }
5402
5403 if (log_is_enabled(Debug, class, resolve)) {
5404 ResourceMark rm;
5405 // print out the superclass.
5406 const char * from = ik->external_name();
5407 if (ik->java_super() != NULL) {
5408 log_debug(class, resolve)("%s %s (super)",
5409 from,
5410 ik->java_super()->external_name());
5411 }
5412 // print out each of the interface classes referred to by this class.
5413 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5414 if (local_interfaces != NULL) {
5415 const int length = local_interfaces->length();
5416 for (int i = 0; i < length; i++) {
5417 const Klass* const k = local_interfaces->at(i);
5418 const char * to = k->external_name();
5419 log_debug(class, resolve)("%s %s (interface)", from, to);
5420 }
5421 }
5422 }
5423 }
5424
5425 TRACE_INIT_ID(ik);
5426
5427 // If we reach here, all is well.
5428 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5429 // in order for it to not be destroyed in the ClassFileParser destructor.
5430 set_klass_to_deallocate(NULL);
5431
5432 // it's official
5433 set_klass(ik);
5434
5435 debug_only(ik->verify();)
5436 }
5437
5438 // For an anonymous class that is in the unnamed package, move it to its host class's
5439 // package by prepending its host class's package name to its class name and setting
5440 // its _class_name field.
5441 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5442 ResourceMark rm(THREAD);
5443 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5444 "Anonymous class should not be in a package");
5445 const char* host_pkg_name =
5446 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5447
5448 if (host_pkg_name != NULL) {
5449 size_t host_pkg_len = strlen(host_pkg_name);
5450 int class_name_len = _class_name->utf8_length();
5451 char* new_anon_name =
5452 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5453 // Copy host package name and trailing /.
5454 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5455 new_anon_name[host_pkg_len] = '/';
5456 // Append anonymous class name. The anonymous class name can contain odd
5457 // characters. So, do a strncpy instead of using sprintf("%s...").
5458 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5459
5460 // Create a symbol and update the anonymous class name.
5461 _class_name = SymbolTable::new_symbol(new_anon_name,
5462 (int)host_pkg_len + 1 + class_name_len,
5463 CHECK);
5464 }
5465 }
5466
5467 // If the host class and the anonymous class are in the same package then do
5468 // nothing. If the anonymous class is in the unnamed package then move it to its
5469 // host's package. If the classes are in different packages then throw an IAE
5470 // exception.
5471 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5472 assert(_host_klass != NULL, "Expected an anonymous class");
5473
5474 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5475 _class_name->utf8_length(), '/');
5476 if (anon_last_slash == NULL) { // Unnamed package
5477 prepend_host_package_name(_host_klass, CHECK);
5478 } else {
5479 if (!InstanceKlass::is_same_class_package(_host_klass->class_loader(),
5480 _host_klass->name(),
5481 _host_klass->class_loader(),
5482 _class_name)) {
5483 ResourceMark rm(THREAD);
5484 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5485 err_msg("Host class %s and anonymous class %s are in different packages",
5486 _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5487 }
5488 }
5489 }
5490
5491 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5492 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5493 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5494 bool need_verify =
5495 // verifyAll
5496 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5497 // verifyRemote
5498 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5499 return !need_verify;
5500 }
5501
5502 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5503 Symbol* name,
5504 ClassLoaderData* loader_data,
5505 Handle protection_domain,
5506 const InstanceKlass* host_klass,
5507 GrowableArray<Handle>* cp_patches,
5508 Publicity pub_level,
5509 TRAPS) :
5510 _stream(stream),
5511 _requested_name(name),
5512 _loader_data(loader_data),
5513 _host_klass(host_klass),
5514 _cp_patches(cp_patches),
5515 _super_klass(),
5516 _cp(NULL),
5517 _fields(NULL),
5518 _methods(NULL),
5519 _inner_classes(NULL),
5520 _local_interfaces(NULL),
5521 _transitive_interfaces(NULL),
5522 _combined_annotations(NULL),
5523 _annotations(NULL),
5524 _type_annotations(NULL),
5525 _fields_annotations(NULL),
5526 _fields_type_annotations(NULL),
5527 _klass(NULL),
5528 _klass_to_deallocate(NULL),
5529 _parsed_annotations(NULL),
5530 _fac(NULL),
5531 _field_info(NULL),
5532 _method_ordering(NULL),
5533 _all_mirandas(NULL),
5534 _vtable_size(0),
5535 _itable_size(0),
5536 _num_miranda_methods(0),
5537 _rt(REF_NONE),
5538 _protection_domain(protection_domain),
5539 _access_flags(),
5540 _pub_level(pub_level),
5541 _synthetic_flag(false),
5542 _sde_length(false),
5543 _sde_buffer(NULL),
5544 _sourcefile_index(0),
5545 _generic_signature_index(0),
5546 _major_version(0),
5547 _minor_version(0),
5548 _this_class_index(0),
5549 _super_class_index(0),
5550 _itfs_len(0),
5551 _java_fields_count(0),
5552 _need_verify(false),
5553 _relax_verify(false),
5554 _has_nonstatic_concrete_methods(false),
5555 _declares_nonstatic_concrete_methods(false),
5556 _has_final_method(false),
5557 _has_finalizer(false),
5558 _has_empty_finalizer(false),
5559 _has_vanilla_constructor(false),
5560 _max_bootstrap_specifier_index(-1) {
5561
5562 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5563
5564 assert(THREAD->is_Java_thread(), "invariant");
5565 assert(_loader_data != NULL, "invariant");
5566 assert(stream != NULL, "invariant");
5567 assert(_stream != NULL, "invariant");
5568 assert(_stream->buffer() == _stream->current(), "invariant");
5569 assert(_class_name != NULL, "invariant");
5570 assert(0 == _access_flags.as_int(), "invariant");
5571
5572 // Figure out whether we can skip format checking (matching classic VM behavior)
5573 if (DumpSharedSpaces) {
5574 // verify == true means it's a 'remote' class (i.e., non-boot class)
5575 // Verification decision is based on BytecodeVerificationRemote flag
5576 // for those classes.
5577 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5578 BytecodeVerificationLocal;
5579 }
5580 else {
5581 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5582 stream->need_verify());
5583 }
5584
5585 // synch back verification state to stream
5586 stream->set_verify(_need_verify);
5587
5588 // Check if verification needs to be relaxed for this class file
5589 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5590 _relax_verify = relax_format_check_for(_loader_data);
5591
5592 parse_stream(stream, CHECK);
5593
5594 post_process_parsed_stream(stream, _cp, CHECK);
5595 }
5596
5597 void ClassFileParser::clear_class_metadata() {
5598 // metadata created before the instance klass is created. Must be
5599 // deallocated if classfile parsing returns an error.
5600 _cp = NULL;
5601 _fields = NULL;
5602 _methods = NULL;
5603 _inner_classes = NULL;
5604 _local_interfaces = NULL;
5605 _transitive_interfaces = NULL;
5606 _combined_annotations = NULL;
5607 _annotations = _type_annotations = NULL;
5608 _fields_annotations = _fields_type_annotations = NULL;
5609 }
5610
5611 // Destructor to clean up
5612 ClassFileParser::~ClassFileParser() {
5613 if (_cp != NULL) {
5614 MetadataFactory::free_metadata(_loader_data, _cp);
5615 }
5616 if (_fields != NULL) {
5617 MetadataFactory::free_array<u2>(_loader_data, _fields);
5618 }
5619
5620 if (_methods != NULL) {
5621 // Free methods
5622 InstanceKlass::deallocate_methods(_loader_data, _methods);
5623 }
5624
5625 // beware of the Universe::empty_blah_array!!
5626 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5627 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5628 }
5629
5630 // Free interfaces
5631 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5632 _local_interfaces, _transitive_interfaces);
5633
5634 if (_combined_annotations != NULL) {
5635 // After all annotations arrays have been created, they are installed into the
5636 // Annotations object that will be assigned to the InstanceKlass being created.
5637
5638 // Deallocate the Annotations object and the installed annotations arrays.
5639 _combined_annotations->deallocate_contents(_loader_data);
5640
5641 // If the _combined_annotations pointer is non-NULL,
5642 // then the other annotations fields should have been cleared.
5643 assert(_annotations == NULL, "Should have been cleared");
5644 assert(_type_annotations == NULL, "Should have been cleared");
5645 assert(_fields_annotations == NULL, "Should have been cleared");
5646 assert(_fields_type_annotations == NULL, "Should have been cleared");
5647 } else {
5648 // If the annotations arrays were not installed into the Annotations object,
5649 // then they have to be deallocated explicitly.
5650 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5651 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5652 Annotations::free_contents(_loader_data, _fields_annotations);
5653 Annotations::free_contents(_loader_data, _fields_type_annotations);
5654 }
5655
5656 clear_class_metadata();
5657
5658 // deallocate the klass if already created. Don't directly deallocate, but add
5659 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5660 // at a safepoint.
5661 if (_klass_to_deallocate != NULL) {
5662 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5663 }
5664 }
5665
5666 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5667 TRAPS) {
5668
5669 assert(stream != NULL, "invariant");
5670 assert(_class_name != NULL, "invariant");
5671
5672 // BEGIN STREAM PARSING
5673 stream->guarantee_more(8, CHECK); // magic, major, minor
5674 // Magic value
5675 const u4 magic = stream->get_u4_fast();
5676 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5677 "Incompatible magic value %u in class file %s",
5678 magic, CHECK);
5679
5680 // Version numbers
5681 _minor_version = stream->get_u2_fast();
5682 _major_version = stream->get_u2_fast();
5683
5684 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5685 ResourceMark rm;
5686 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5687 _major_version, _minor_version, _class_name->as_C_string());
5688 Exceptions::fthrow(
5689 THREAD_AND_LOCATION,
5690 vmSymbols::java_lang_UnsupportedClassVersionError(),
5691 "Unsupported major.minor version for dump time %u.%u",
5692 _major_version,
5693 _minor_version);
5694 }
5695
5696 // Check version numbers - we check this even with verifier off
5697 if (!is_supported_version(_major_version, _minor_version)) {
5698 ResourceMark rm(THREAD);
5699 Exceptions::fthrow(
5700 THREAD_AND_LOCATION,
5701 vmSymbols::java_lang_UnsupportedClassVersionError(),
5702 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5703 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
5704 _class_name->as_C_string(),
5705 _major_version,
5706 _minor_version,
5707 JAVA_MAX_SUPPORTED_VERSION,
5708 JAVA_MAX_SUPPORTED_MINOR_VERSION);
5709 return;
5710 }
5711
5712 stream->guarantee_more(3, CHECK); // length, first cp tag
5713 const u2 cp_size = stream->get_u2_fast();
5714
5715 guarantee_property(
5716 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5717 cp_size, CHECK);
5718
5719 _cp = ConstantPool::allocate(_loader_data,
5720 cp_size,
5721 CHECK);
5722
5723 ConstantPool* const cp = _cp;
5724
5725 parse_constant_pool(stream, cp, cp_size, CHECK);
5726
5727 assert(cp_size == (const u2)cp->length(), "invariant");
5728
5729 // ACCESS FLAGS
5730 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5731
5732 // Access flags
5733 jint flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5734
5735 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5736 // Set abstract bit for old class files for backward compatibility
5737 flags |= JVM_ACC_ABSTRACT;
5738 }
5739
5740 _access_flags.set_flags(flags);
5741
5742 verify_legal_class_modifiers((jint)_access_flags.as_int(), CHECK);
5743
5744 // This class and superclass
5745 _this_class_index = stream->get_u2_fast();
5746 check_property(
5747 valid_cp_range(_this_class_index, cp_size) &&
5748 cp->tag_at(_this_class_index).is_unresolved_klass(),
5749 "Invalid this class index %u in constant pool in class file %s",
5750 _this_class_index, CHECK);
5751
5752 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5753 assert(class_name_in_cp != NULL, "class_name can't be null");
5754
5755 // Update _class_name which could be null previously
5756 // to reflect the name in the constant pool
5757 _class_name = class_name_in_cp;
5758
5759 // Don't need to check whether this class name is legal or not.
5760 // It has been checked when constant pool is parsed.
5761 // However, make sure it is not an array type.
5762 if (_need_verify) {
5763 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
5764 "Bad class name in class file %s",
5765 CHECK);
5766 }
5767
5768 // Checks if name in class file matches requested name
5769 if (_requested_name != NULL && _requested_name != _class_name) {
5770 ResourceMark rm(THREAD);
5771 Exceptions::fthrow(
5772 THREAD_AND_LOCATION,
5773 vmSymbols::java_lang_NoClassDefFoundError(),
5774 "%s (wrong name: %s)",
5775 _class_name->as_C_string(),
5776 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
5777 );
5778 return;
5779 }
5780
5781 // if this is an anonymous class fix up its name if it's in the unnamed
5782 // package. Otherwise, throw IAE if it is in a different package than
5783 // its host class.
5784 if (_host_klass != NULL) {
5785 fix_anonymous_class_name(CHECK);
5786 }
5787
5788 // Verification prevents us from creating names with dots in them, this
5789 // asserts that that's the case.
5790 assert(is_internal_format(_class_name), "external class name format used internally");
5791
5792 if (!is_internal()) {
5793 if (log_is_enabled(Debug, class, preorder)){
5794 ResourceMark rm(THREAD);
5795 outputStream* log = Log(class, preorder)::debug_stream();
5796 log->print("%s", _class_name->as_klass_external_name());
5797 if (stream->source() != NULL) {
5798 log->print(" source: %s", stream->source());
5799 }
5800 log->cr();
5801 }
5802
5803 #if INCLUDE_CDS
5804 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5805 // Only dump the classes that can be stored into CDS archive.
5806 // Anonymous classes such as generated LambdaForm classes are also not included.
5807 if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
5808 _host_klass == NULL) {
5809 oop class_loader = _loader_data->class_loader();
5810 ResourceMark rm(THREAD);
5811 // For the boot and platform class loaders, check if the class is not found in the
5812 // java runtime image. Additional check for the boot class loader is if the class
5813 // is not found in the boot loader's appended entries. This indicates that the class
5814 // is not useable during run time, such as the ones found in the --patch-module entries,
5815 // so it should not be included in the classlist file.
5816 if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) ||
5817 SystemDictionary::is_platform_class_loader(class_loader)) &&
5818 !ClassLoader::is_jrt(stream->source())) {
5819 tty->print_cr("skip writing class %s from source %s to classlist file",
5820 _class_name->as_C_string(), stream->source());
5821 } else {
5822 classlist_file->print_cr("%s", _class_name->as_C_string());
5823 classlist_file->flush();
5824 }
5825 }
5826 }
5827 #endif
5828 }
5829
5830 // SUPERKLASS
5831 _super_class_index = stream->get_u2_fast();
5832 _super_klass = parse_super_class(cp,
5833 _super_class_index,
5834 _need_verify,
5835 CHECK);
5836
5837 // Interfaces
5838 _itfs_len = stream->get_u2_fast();
5839 parse_interfaces(stream,
5840 _itfs_len,
5841 cp,
5842 &_has_nonstatic_concrete_methods,
5843 CHECK);
5844
5845 assert(_local_interfaces != NULL, "invariant");
5846
5847 // Fields (offsets are filled in later)
5848 _fac = new FieldAllocationCount();
5849 parse_fields(stream,
5850 _access_flags.is_interface(),
5851 _fac,
5852 cp,
5853 cp_size,
5854 &_java_fields_count,
5855 CHECK);
5856
5857 assert(_fields != NULL, "invariant");
5858
5859 // Methods
5860 AccessFlags promoted_flags;
5861 parse_methods(stream,
5862 _access_flags.is_interface(),
5863 &promoted_flags,
5864 &_has_final_method,
5865 &_declares_nonstatic_concrete_methods,
5866 CHECK);
5867
5868 assert(_methods != NULL, "invariant");
5869
5870 // promote flags from parse_methods() to the klass' flags
5871 _access_flags.add_promoted_flags(promoted_flags.as_int());
5872
5873 if (_declares_nonstatic_concrete_methods) {
5874 _has_nonstatic_concrete_methods = true;
5875 }
5876
5877 // Additional attributes/annotations
5878 _parsed_annotations = new ClassAnnotationCollector();
5879 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5880
5881 assert(_inner_classes != NULL, "invariant");
5882
5883 // Finalize the Annotations metadata object,
5884 // now that all annotation arrays have been created.
5885 create_combined_annotations(CHECK);
5886
5887 // Make sure this is the end of class file stream
5888 guarantee_property(stream->at_eos(),
5889 "Extra bytes at the end of class file %s",
5890 CHECK);
5891
5892 // all bytes in stream read and parsed
5893 }
5894
5895 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5896 ConstantPool* cp,
5897 TRAPS) {
5898 assert(stream != NULL, "invariant");
5899 assert(stream->at_eos(), "invariant");
5900 assert(cp != NULL, "invariant");
5901 assert(_loader_data != NULL, "invariant");
5902
5903 if (_class_name == vmSymbols::java_lang_Object()) {
5904 check_property(_local_interfaces == Universe::the_empty_klass_array(),
5905 "java.lang.Object cannot implement an interface in class file %s",
5906 CHECK);
5907 }
5908 // We check super class after class file is parsed and format is checked
5909 if (_super_class_index > 0 && NULL ==_super_klass) {
5910 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5911 if (_access_flags.is_interface()) {
5912 // Before attempting to resolve the superclass, check for class format
5913 // errors not checked yet.
5914 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5915 "Interfaces must have java.lang.Object as superclass in class file %s",
5916 CHECK);
5917 }
5918 _super_klass = (const InstanceKlass*)
5919 SystemDictionary::resolve_super_or_fail(_class_name,
5920 super_class_name,
5921 _loader_data->class_loader(),
5922 _protection_domain,
5923 true,
5924 CHECK);
5925 }
5926
5927 if (_super_klass != NULL) {
5928 if (_super_klass->has_nonstatic_concrete_methods()) {
5929 _has_nonstatic_concrete_methods = true;
5930 }
5931
5932 if (_super_klass->is_interface()) {
5933 ResourceMark rm(THREAD);
5934 Exceptions::fthrow(
5935 THREAD_AND_LOCATION,
5936 vmSymbols::java_lang_IncompatibleClassChangeError(),
5937 "class %s has interface %s as super class",
5938 _class_name->as_klass_external_name(),
5939 _super_klass->external_name()
5940 );
5941 return;
5942 }
5943 // Make sure super class is not final
5944 if (_super_klass->is_final()) {
5945 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
5946 }
5947 }
5948
5949 // Compute the transitive list of all unique interfaces implemented by this class
5950 _transitive_interfaces =
5951 compute_transitive_interfaces(_super_klass,
5952 _local_interfaces,
5953 _loader_data,
5954 CHECK);
5955
5956 assert(_transitive_interfaces != NULL, "invariant");
5957
5958 // sort methods
5959 _method_ordering = sort_methods(_methods);
5960
5961 _all_mirandas = new GrowableArray<Method*>(20);
5962
5963 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5964 &_num_miranda_methods,
5965 _all_mirandas,
5966 _super_klass,
5967 _methods,
5968 _access_flags,
5969 _major_version,
5970 _loader_data->class_loader(),
5971 _class_name,
5972 _local_interfaces,
5973 CHECK);
5974
5975 // Size of Java itable (in words)
5976 _itable_size = _access_flags.is_interface() ? 0 :
5977 klassItable::compute_itable_size(_transitive_interfaces);
5978
5979 assert(_fac != NULL, "invariant");
5980 assert(_parsed_annotations != NULL, "invariant");
5981
5982 _field_info = new FieldLayoutInfo();
5983 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
5984
5985 // Compute reference typ
5986 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
5987
5988 }
5989
5990 void ClassFileParser::set_klass(InstanceKlass* klass) {
5991
5992 #ifdef ASSERT
5993 if (klass != NULL) {
5994 assert(NULL == _klass, "leaking?");
5995 }
5996 #endif
5997
5998 _klass = klass;
5999 }
6000
6001 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6002
6003 #ifdef ASSERT
6004 if (klass != NULL) {
6005 assert(NULL == _klass_to_deallocate, "leaking?");
6006 }
6007 #endif
6008
6009 _klass_to_deallocate = klass;
6010 }
6011
6012 // Caller responsible for ResourceMark
6013 // clone stream with rewound position
6014 const ClassFileStream* ClassFileParser::clone_stream() const {
6015 assert(_stream != NULL, "invariant");
6016
6017 return _stream->clone();
6018 }
6019 // ----------------------------------------------------------------------------
6020 // debugging
6021
6022 #ifdef ASSERT
6023
6024 // return true if class_name contains no '.' (internal format is '/')
6025 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6026 if (class_name != NULL) {
6027 ResourceMark rm;
6028 char* name = class_name->as_C_string();
6029 return strchr(name, '.') == NULL;
6030 } else {
6031 return true;
6032 }
6033 }
6034
6035 #endif