1 /*
2 * Copyright (c) 1997, 2016, 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 // Safely increment index by val if does not pass limit
1029 #define SAFE_ADD(index, limit, val) \
1030 if (index >= limit - val) return limit; \
1031 index += val;
1032
1033 // Skip an annotation. Return >=limit if there is any problem.
1034 static int skip_annotation(const u1* buffer, int limit, int index) {
1035 assert(buffer != NULL, "invariant");
1036 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1037 // value := switch (tag:u1) { ... }
1038 SAFE_ADD(index, limit, 4); // skip atype and read nmem
1039 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1040 while (--nmem >= 0 && index < limit) {
1041 SAFE_ADD(index, limit, 2); // skip member
1042 index = skip_annotation_value(buffer, limit, index);
1043 }
1044 return index;
1045 }
1046
1047 // Skip an annotation value. Return >=limit if there is any problem.
1048 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1049 assert(buffer != NULL, "invariant");
1050
1051 // value := switch (tag:u1) {
1052 // case B, C, I, S, Z, D, F, J, c: con:u2;
1053 // case e: e_class:u2 e_name:u2;
1054 // case s: s_con:u2;
1055 // case [: do(nval:u2) {value};
1056 // case @: annotation;
1057 // case s: s_con:u2;
1058 // }
1059 SAFE_ADD(index, limit, 1); // read tag
1060 const u1 tag = buffer[index - 1];
1061 switch (tag) {
1062 case 'B':
1063 case 'C':
1064 case 'I':
1065 case 'S':
1066 case 'Z':
1067 case 'D':
1068 case 'F':
1069 case 'J':
1070 case 'c':
1071 case 's':
1072 SAFE_ADD(index, limit, 2); // skip con or s_con
1073 break;
1074 case 'e':
1075 SAFE_ADD(index, limit, 4); // skip e_class, e_name
1076 break;
1077 case '[':
1078 {
1079 SAFE_ADD(index, limit, 2); // read nval
1080 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1081 while (--nval >= 0 && index < limit) {
1082 index = skip_annotation_value(buffer, limit, index);
1083 }
1084 }
1085 break;
1086 case '@':
1087 index = skip_annotation(buffer, limit, index);
1088 break;
1089 default:
1090 return limit; // bad tag byte
1091 }
1092 return index;
1093 }
1094
1095 // Sift through annotations, looking for those significant to the VM:
1096 static void parse_annotations(const ConstantPool* const cp,
1097 const u1* buffer, int limit,
1098 AnnotationCollector* coll,
1099 ClassLoaderData* loader_data,
1100 TRAPS) {
1101
1102 assert(cp != NULL, "invariant");
1103 assert(buffer != NULL, "invariant");
1104 assert(coll != NULL, "invariant");
1105 assert(loader_data != NULL, "invariant");
1106
1107 // annotations := do(nann:u2) {annotation}
1108 int index = 2; // read nann
1109 if (index >= limit) return;
1110 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1111 enum { // initial annotation layout
1112 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1113 count_off = 2, // u2 such as 1 (one value)
1114 member_off = 4, // utf8 such as 'value'
1115 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1116 e_tag_val = 'e',
1117 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1118 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1119 e_size = 11, // end of 'e' annotation
1120 c_tag_val = 'c', // payload is type
1121 c_con_off = 7, // utf8 payload, such as 'I'
1122 c_size = 9, // end of 'c' annotation
1123 s_tag_val = 's', // payload is String
1124 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1125 s_size = 9,
1126 min_size = 6 // smallest possible size (zero members)
1127 };
1128 // Cannot add min_size to index in case of overflow MAX_INT
1129 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1130 int index0 = index;
1131 index = skip_annotation(buffer, limit, index);
1132 const u1* const abase = buffer + index0;
1133 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1134 const int count = Bytes::get_Java_u2((address)abase + count_off);
1135 const Symbol* const aname = check_symbol_at(cp, atype);
1136 if (aname == NULL) break; // invalid annotation name
1137 const Symbol* member = NULL;
1138 if (count >= 1) {
1139 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1140 member = check_symbol_at(cp, member_index);
1141 if (member == NULL) break; // invalid member name
1142 }
1143
1144 // Here is where parsing particular annotations will take place.
1145 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1146 if (AnnotationCollector::_unknown == id) continue;
1147 coll->set_annotation(id);
1148
1149 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1150 // @Contended can optionally specify the contention group.
1151 //
1152 // Contended group defines the equivalence class over the fields:
1153 // the fields within the same contended group are not treated distinct.
1154 // The only exception is default group, which does not incur the
1155 // equivalence. Naturally, contention group for classes is meaningless.
1156 //
1157 // While the contention group is specified as String, annotation
1158 // values are already interned, and we might as well use the constant
1159 // pool index as the group tag.
1160 //
1161 u2 group_index = 0; // default contended group
1162 if (count == 1
1163 && s_size == (index - index0) // match size
1164 && s_tag_val == *(abase + tag_off)
1165 && member == vmSymbols::value_name()) {
1166 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1167 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1168 group_index = 0; // default contended group
1169 }
1170 }
1171 coll->set_contended_group(group_index);
1172 }
1173 }
1174 }
1175
1176
1177 // Parse attributes for a field.
1178 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1179 u2 attributes_count,
1180 bool is_static, u2 signature_index,
1181 u2* const constantvalue_index_addr,
1182 bool* const is_synthetic_addr,
1183 u2* const generic_signature_index_addr,
1184 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1185 TRAPS) {
1186 assert(cfs != NULL, "invariant");
1187 assert(constantvalue_index_addr != NULL, "invariant");
1188 assert(is_synthetic_addr != NULL, "invariant");
1189 assert(generic_signature_index_addr != NULL, "invariant");
1190 assert(parsed_annotations != NULL, "invariant");
1191 assert(attributes_count > 0, "attributes_count should be greater than 0");
1192
1193 u2 constantvalue_index = 0;
1194 u2 generic_signature_index = 0;
1195 bool is_synthetic = false;
1196 const u1* runtime_visible_annotations = NULL;
1197 int runtime_visible_annotations_length = 0;
1198 const u1* runtime_invisible_annotations = NULL;
1199 int runtime_invisible_annotations_length = 0;
1200 const u1* runtime_visible_type_annotations = NULL;
1201 int runtime_visible_type_annotations_length = 0;
1202 const u1* runtime_invisible_type_annotations = NULL;
1203 int runtime_invisible_type_annotations_length = 0;
1204 bool runtime_invisible_annotations_exists = false;
1205 bool runtime_invisible_type_annotations_exists = false;
1206 const ConstantPool* const cp = _cp;
1207
1208 while (attributes_count--) {
1209 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1210 const u2 attribute_name_index = cfs->get_u2_fast();
1211 const u4 attribute_length = cfs->get_u4_fast();
1212 check_property(valid_symbol_at(attribute_name_index),
1213 "Invalid field attribute index %u in class file %s",
1214 attribute_name_index,
1215 CHECK);
1216
1217 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1218 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1219 // ignore if non-static
1220 if (constantvalue_index != 0) {
1221 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1222 }
1223 check_property(
1224 attribute_length == 2,
1225 "Invalid ConstantValue field attribute length %u in class file %s",
1226 attribute_length, CHECK);
1227
1228 constantvalue_index = cfs->get_u2(CHECK);
1229 if (_need_verify) {
1230 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1231 }
1232 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1233 if (attribute_length != 0) {
1234 classfile_parse_error(
1235 "Invalid Synthetic field attribute length %u in class file %s",
1236 attribute_length, CHECK);
1237 }
1238 is_synthetic = true;
1239 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1240 if (attribute_length != 0) {
1241 classfile_parse_error(
1242 "Invalid Deprecated field attribute length %u in class file %s",
1243 attribute_length, CHECK);
1244 }
1245 } else if (_major_version >= JAVA_1_5_VERSION) {
1246 if (attribute_name == vmSymbols::tag_signature()) {
1247 if (attribute_length != 2) {
1248 classfile_parse_error(
1249 "Wrong size %u for field's Signature attribute in class file %s",
1250 attribute_length, CHECK);
1251 }
1252 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1253 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1254 if (runtime_visible_annotations != NULL) {
1255 classfile_parse_error(
1256 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1257 }
1258 runtime_visible_annotations_length = attribute_length;
1259 runtime_visible_annotations = cfs->get_u1_buffer();
1260 assert(runtime_visible_annotations != NULL, "null visible annotations");
1261 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1262 parse_annotations(cp,
1263 runtime_visible_annotations,
1264 runtime_visible_annotations_length,
1265 parsed_annotations,
1266 _loader_data,
1267 CHECK);
1268 cfs->skip_u1_fast(runtime_visible_annotations_length);
1269 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1270 if (runtime_invisible_annotations_exists) {
1271 classfile_parse_error(
1272 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1273 }
1274 runtime_invisible_annotations_exists = true;
1275 if (PreserveAllAnnotations) {
1276 runtime_invisible_annotations_length = attribute_length;
1277 runtime_invisible_annotations = cfs->get_u1_buffer();
1278 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1279 }
1280 cfs->skip_u1(attribute_length, CHECK);
1281 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1282 if (runtime_visible_type_annotations != NULL) {
1283 classfile_parse_error(
1284 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1285 }
1286 runtime_visible_type_annotations_length = attribute_length;
1287 runtime_visible_type_annotations = cfs->get_u1_buffer();
1288 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1289 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1290 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1291 if (runtime_invisible_type_annotations_exists) {
1292 classfile_parse_error(
1293 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1294 } else {
1295 runtime_invisible_type_annotations_exists = true;
1296 }
1297 if (PreserveAllAnnotations) {
1298 runtime_invisible_type_annotations_length = attribute_length;
1299 runtime_invisible_type_annotations = cfs->get_u1_buffer();
1300 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1301 }
1302 cfs->skip_u1(attribute_length, CHECK);
1303 } else {
1304 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1305 }
1306 } else {
1307 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1308 }
1309 }
1310
1311 *constantvalue_index_addr = constantvalue_index;
1312 *is_synthetic_addr = is_synthetic;
1313 *generic_signature_index_addr = generic_signature_index;
1314 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1315 runtime_visible_annotations_length,
1316 runtime_invisible_annotations,
1317 runtime_invisible_annotations_length,
1318 CHECK);
1319 parsed_annotations->set_field_annotations(a);
1320 a = assemble_annotations(runtime_visible_type_annotations,
1321 runtime_visible_type_annotations_length,
1322 runtime_invisible_type_annotations,
1323 runtime_invisible_type_annotations_length,
1324 CHECK);
1325 parsed_annotations->set_field_type_annotations(a);
1326 return;
1327 }
1328
1329
1330 // Field allocation types. Used for computing field offsets.
1331
1332 enum FieldAllocationType {
1333 STATIC_OOP, // Oops
1334 STATIC_BYTE, // Boolean, Byte, char
1335 STATIC_SHORT, // shorts
1336 STATIC_WORD, // ints
1337 STATIC_DOUBLE, // aligned long or double
1338 NONSTATIC_OOP,
1339 NONSTATIC_BYTE,
1340 NONSTATIC_SHORT,
1341 NONSTATIC_WORD,
1342 NONSTATIC_DOUBLE,
1343 MAX_FIELD_ALLOCATION_TYPE,
1344 BAD_ALLOCATION_TYPE = -1
1345 };
1346
1347 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1348 BAD_ALLOCATION_TYPE, // 0
1349 BAD_ALLOCATION_TYPE, // 1
1350 BAD_ALLOCATION_TYPE, // 2
1351 BAD_ALLOCATION_TYPE, // 3
1352 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1353 NONSTATIC_SHORT, // T_CHAR = 5,
1354 NONSTATIC_WORD, // T_FLOAT = 6,
1355 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1356 NONSTATIC_BYTE, // T_BYTE = 8,
1357 NONSTATIC_SHORT, // T_SHORT = 9,
1358 NONSTATIC_WORD, // T_INT = 10,
1359 NONSTATIC_DOUBLE, // T_LONG = 11,
1360 NONSTATIC_OOP, // T_OBJECT = 12,
1361 NONSTATIC_OOP, // T_ARRAY = 13,
1362 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1363 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1364 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1365 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1366 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1367 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1368 BAD_ALLOCATION_TYPE, // 0
1369 BAD_ALLOCATION_TYPE, // 1
1370 BAD_ALLOCATION_TYPE, // 2
1371 BAD_ALLOCATION_TYPE, // 3
1372 STATIC_BYTE , // T_BOOLEAN = 4,
1373 STATIC_SHORT, // T_CHAR = 5,
1374 STATIC_WORD, // T_FLOAT = 6,
1375 STATIC_DOUBLE, // T_DOUBLE = 7,
1376 STATIC_BYTE, // T_BYTE = 8,
1377 STATIC_SHORT, // T_SHORT = 9,
1378 STATIC_WORD, // T_INT = 10,
1379 STATIC_DOUBLE, // T_LONG = 11,
1380 STATIC_OOP, // T_OBJECT = 12,
1381 STATIC_OOP, // T_ARRAY = 13,
1382 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1383 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1384 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1385 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1386 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1387 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1388 };
1389
1390 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1391 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1392 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1393 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1394 return result;
1395 }
1396
1397 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1398 public:
1399 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1400
1401 FieldAllocationCount() {
1402 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1403 count[i] = 0;
1404 }
1405 }
1406
1407 FieldAllocationType update(bool is_static, BasicType type) {
1408 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1409 if (atype != BAD_ALLOCATION_TYPE) {
1410 // Make sure there is no overflow with injected fields.
1411 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1412 count[atype]++;
1413 }
1414 return atype;
1415 }
1416 };
1417
1418 // Side-effects: populates the _fields, _fields_annotations,
1419 // _fields_type_annotations fields
1420 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1421 bool is_interface,
1422 FieldAllocationCount* const fac,
1423 ConstantPool* cp,
1424 const int cp_size,
1425 u2* const java_fields_count_ptr,
1426 TRAPS) {
1427
1428 assert(cfs != NULL, "invariant");
1429 assert(fac != NULL, "invariant");
1430 assert(cp != NULL, "invariant");
1431 assert(java_fields_count_ptr != NULL, "invariant");
1432
1433 assert(NULL == _fields, "invariant");
1434 assert(NULL == _fields_annotations, "invariant");
1435 assert(NULL == _fields_type_annotations, "invariant");
1436
1437 cfs->guarantee_more(2, CHECK); // length
1438 const u2 length = cfs->get_u2_fast();
1439 *java_fields_count_ptr = length;
1440
1441 int num_injected = 0;
1442 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1443 &num_injected);
1444 const int total_fields = length + num_injected;
1445
1446 // The field array starts with tuples of shorts
1447 // [access, name index, sig index, initial value index, byte offset].
1448 // A generic signature slot only exists for field with generic
1449 // signature attribute. And the access flag is set with
1450 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1451 // signature slots are at the end of the field array and after all
1452 // other fields data.
1453 //
1454 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1455 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1456 // ...
1457 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1458 // [generic signature index]
1459 // [generic signature index]
1460 // ...
1461 //
1462 // Allocate a temporary resource array for field data. For each field,
1463 // a slot is reserved in the temporary array for the generic signature
1464 // index. After parsing all fields, the data are copied to a permanent
1465 // array and any unused slots will be discarded.
1466 ResourceMark rm(THREAD);
1467 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1468 u2,
1469 total_fields * (FieldInfo::field_slots + 1));
1470
1471 // The generic signature slots start after all other fields' data.
1472 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1473 int num_generic_signature = 0;
1474 for (int n = 0; n < length; n++) {
1475 // access_flags, name_index, descriptor_index, attributes_count
1476 cfs->guarantee_more(8, CHECK);
1477
1478 AccessFlags access_flags;
1479 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1480 verify_legal_field_modifiers(flags, is_interface, CHECK);
1481 access_flags.set_flags(flags);
1482
1483 const u2 name_index = cfs->get_u2_fast();
1484 check_property(valid_symbol_at(name_index),
1485 "Invalid constant pool index %u for field name in class file %s",
1486 name_index, CHECK);
1487 const Symbol* const name = cp->symbol_at(name_index);
1488 verify_legal_field_name(name, CHECK);
1489
1490 const u2 signature_index = cfs->get_u2_fast();
1491 check_property(valid_symbol_at(signature_index),
1492 "Invalid constant pool index %u for field signature in class file %s",
1493 signature_index, CHECK);
1494 const Symbol* const sig = cp->symbol_at(signature_index);
1495 verify_legal_field_signature(name, sig, CHECK);
1496
1497 u2 constantvalue_index = 0;
1498 bool is_synthetic = false;
1499 u2 generic_signature_index = 0;
1500 const bool is_static = access_flags.is_static();
1501 FieldAnnotationCollector parsed_annotations(_loader_data);
1502
1503 const u2 attributes_count = cfs->get_u2_fast();
1504 if (attributes_count > 0) {
1505 parse_field_attributes(cfs,
1506 attributes_count,
1507 is_static,
1508 signature_index,
1509 &constantvalue_index,
1510 &is_synthetic,
1511 &generic_signature_index,
1512 &parsed_annotations,
1513 CHECK);
1514
1515 if (parsed_annotations.field_annotations() != NULL) {
1516 if (_fields_annotations == NULL) {
1517 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1518 _loader_data, length, NULL,
1519 CHECK);
1520 }
1521 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1522 parsed_annotations.set_field_annotations(NULL);
1523 }
1524 if (parsed_annotations.field_type_annotations() != NULL) {
1525 if (_fields_type_annotations == NULL) {
1526 _fields_type_annotations =
1527 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1528 length,
1529 NULL,
1530 CHECK);
1531 }
1532 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1533 parsed_annotations.set_field_type_annotations(NULL);
1534 }
1535
1536 if (is_synthetic) {
1537 access_flags.set_is_synthetic();
1538 }
1539 if (generic_signature_index != 0) {
1540 access_flags.set_field_has_generic_signature();
1541 fa[generic_signature_slot] = generic_signature_index;
1542 generic_signature_slot ++;
1543 num_generic_signature ++;
1544 }
1545 }
1546
1547 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1548 field->initialize(access_flags.as_short(),
1549 name_index,
1550 signature_index,
1551 constantvalue_index);
1552 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1553
1554 // Remember how many oops we encountered and compute allocation type
1555 const FieldAllocationType atype = fac->update(is_static, type);
1556 field->set_allocation_type(atype);
1557
1558 // After field is initialized with type, we can augment it with aux info
1559 if (parsed_annotations.has_any_annotations())
1560 parsed_annotations.apply_to(field);
1561 }
1562
1563 int index = length;
1564 if (num_injected != 0) {
1565 for (int n = 0; n < num_injected; n++) {
1566 // Check for duplicates
1567 if (injected[n].may_be_java) {
1568 const Symbol* const name = injected[n].name();
1569 const Symbol* const signature = injected[n].signature();
1570 bool duplicate = false;
1571 for (int i = 0; i < length; i++) {
1572 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1573 if (name == cp->symbol_at(f->name_index()) &&
1574 signature == cp->symbol_at(f->signature_index())) {
1575 // Symbol is desclared in Java so skip this one
1576 duplicate = true;
1577 break;
1578 }
1579 }
1580 if (duplicate) {
1581 // These will be removed from the field array at the end
1582 continue;
1583 }
1584 }
1585
1586 // Injected field
1587 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1588 field->initialize(JVM_ACC_FIELD_INTERNAL,
1589 injected[n].name_index,
1590 injected[n].signature_index,
1591 0);
1592
1593 const BasicType type = FieldType::basic_type(injected[n].signature());
1594
1595 // Remember how many oops we encountered and compute allocation type
1596 const FieldAllocationType atype = fac->update(false, type);
1597 field->set_allocation_type(atype);
1598 index++;
1599 }
1600 }
1601
1602 assert(NULL == _fields, "invariant");
1603
1604 _fields =
1605 MetadataFactory::new_array<u2>(_loader_data,
1606 index * FieldInfo::field_slots + num_generic_signature,
1607 CHECK);
1608 // Sometimes injected fields already exist in the Java source so
1609 // the fields array could be too long. In that case the
1610 // fields array is trimed. Also unused slots that were reserved
1611 // for generic signature indexes are discarded.
1612 {
1613 int i = 0;
1614 for (; i < index * FieldInfo::field_slots; i++) {
1615 _fields->at_put(i, fa[i]);
1616 }
1617 for (int j = total_fields * FieldInfo::field_slots;
1618 j < generic_signature_slot; j++) {
1619 _fields->at_put(i++, fa[j]);
1620 }
1621 assert(_fields->length() == i, "");
1622 }
1623
1624 if (_need_verify && length > 1) {
1625 // Check duplicated fields
1626 ResourceMark rm(THREAD);
1627 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1628 THREAD, NameSigHash*, HASH_ROW_SIZE);
1629 initialize_hashtable(names_and_sigs);
1630 bool dup = false;
1631 {
1632 debug_only(NoSafepointVerifier nsv;)
1633 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1634 const Symbol* const name = fs.name();
1635 const Symbol* const sig = fs.signature();
1636 // If no duplicates, add name/signature in hashtable names_and_sigs.
1637 if (!put_after_lookup(name, sig, names_and_sigs)) {
1638 dup = true;
1639 break;
1640 }
1641 }
1642 }
1643 if (dup) {
1644 classfile_parse_error("Duplicate field name&signature in class file %s",
1645 CHECK);
1646 }
1647 }
1648 }
1649
1650
1651 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) {
1652 while (length-- > 0) {
1653 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1654 }
1655 }
1656
1657 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1658 u4 code_length,
1659 u4 exception_table_length,
1660 TRAPS) {
1661 assert(cfs != NULL, "invariant");
1662
1663 const u2* const exception_table_start = cfs->get_u2_buffer();
1664 assert(exception_table_start != NULL, "null exception table");
1665
1666 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1667 // end_pc,
1668 // handler_pc,
1669 // catch_type_index
1670
1671 // Will check legal target after parsing code array in verifier.
1672 if (_need_verify) {
1673 for (unsigned int i = 0; i < exception_table_length; i++) {
1674 const u2 start_pc = cfs->get_u2_fast();
1675 const u2 end_pc = cfs->get_u2_fast();
1676 const u2 handler_pc = cfs->get_u2_fast();
1677 const u2 catch_type_index = cfs->get_u2_fast();
1678 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1679 "Illegal exception table range in class file %s",
1680 CHECK_NULL);
1681 guarantee_property(handler_pc < code_length,
1682 "Illegal exception table handler in class file %s",
1683 CHECK_NULL);
1684 if (catch_type_index != 0) {
1685 guarantee_property(valid_klass_reference_at(catch_type_index),
1686 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1687 }
1688 }
1689 } else {
1690 cfs->skip_u2_fast(exception_table_length * 4);
1691 }
1692 return exception_table_start;
1693 }
1694
1695 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1696 u4 code_length,
1697 CompressedLineNumberWriteStream**const write_stream,
1698 TRAPS) {
1699
1700 const ClassFileStream* const cfs = _stream;
1701 unsigned int num_entries = cfs->get_u2(CHECK);
1702
1703 // Each entry is a u2 start_pc, and a u2 line_number
1704 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1705
1706 // Verify line number attribute and table length
1707 check_property(
1708 code_attribute_length == sizeof(u2) + length_in_bytes,
1709 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1710
1711 cfs->guarantee_more(length_in_bytes, CHECK);
1712
1713 if ((*write_stream) == NULL) {
1714 if (length_in_bytes > fixed_buffer_size) {
1715 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1716 } else {
1717 (*write_stream) = new CompressedLineNumberWriteStream(
1718 _linenumbertable_buffer, fixed_buffer_size);
1719 }
1720 }
1721
1722 while (num_entries-- > 0) {
1723 const u2 bci = cfs->get_u2_fast(); // start_pc
1724 const u2 line = cfs->get_u2_fast(); // line_number
1725 guarantee_property(bci < code_length,
1726 "Invalid pc in LineNumberTable in class file %s", CHECK);
1727 (*write_stream)->write_pair(bci, line);
1728 }
1729 }
1730
1731
1732 class LVT_Hash : public AllStatic {
1733 public:
1734
1735 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1736 /*
1737 * 3-tuple start_bci/length/slot has to be unique key,
1738 * so the following comparison seems to be redundant:
1739 * && elem->name_cp_index == entry->_elem->name_cp_index
1740 */
1741 return (e0.start_bci == e1.start_bci &&
1742 e0.length == e1.length &&
1743 e0.name_cp_index == e1.name_cp_index &&
1744 e0.slot == e1.slot);
1745 }
1746
1747 static unsigned int hash(LocalVariableTableElement const& e0) {
1748 unsigned int raw_hash = e0.start_bci;
1749
1750 raw_hash = e0.length + raw_hash * 37;
1751 raw_hash = e0.name_cp_index + raw_hash * 37;
1752 raw_hash = e0.slot + raw_hash * 37;
1753
1754 return raw_hash;
1755 }
1756 };
1757
1758
1759 // Class file LocalVariableTable elements.
1760 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1761 public:
1762 u2 start_bci;
1763 u2 length;
1764 u2 name_cp_index;
1765 u2 descriptor_cp_index;
1766 u2 slot;
1767 };
1768
1769 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1770 LocalVariableTableElement* const lvt) {
1771 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1772 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1773 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1774 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1775 lvt->signature_cp_index = 0;
1776 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1777 }
1778
1779 // Function is used to parse both attributes:
1780 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1781 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1782 u4 code_length,
1783 u2 max_locals,
1784 u4 code_attribute_length,
1785 u2* const localvariable_table_length,
1786 bool isLVTT,
1787 TRAPS) {
1788 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1789 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1790 const unsigned int size =
1791 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1792
1793 const ConstantPool* const cp = _cp;
1794
1795 // Verify local variable table attribute has right length
1796 if (_need_verify) {
1797 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1798 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1799 }
1800
1801 const u2* const localvariable_table_start = cfs->get_u2_buffer();
1802 assert(localvariable_table_start != NULL, "null local variable table");
1803 if (!_need_verify) {
1804 cfs->skip_u2_fast(size);
1805 } else {
1806 cfs->guarantee_more(size * 2, CHECK_NULL);
1807 for(int i = 0; i < (*localvariable_table_length); i++) {
1808 const u2 start_pc = cfs->get_u2_fast();
1809 const u2 length = cfs->get_u2_fast();
1810 const u2 name_index = cfs->get_u2_fast();
1811 const u2 descriptor_index = cfs->get_u2_fast();
1812 const u2 index = cfs->get_u2_fast();
1813 // Assign to a u4 to avoid overflow
1814 const u4 end_pc = (u4)start_pc + (u4)length;
1815
1816 if (start_pc >= code_length) {
1817 classfile_parse_error(
1818 "Invalid start_pc %u in %s in class file %s",
1819 start_pc, tbl_name, CHECK_NULL);
1820 }
1821 if (end_pc > code_length) {
1822 classfile_parse_error(
1823 "Invalid length %u in %s in class file %s",
1824 length, tbl_name, CHECK_NULL);
1825 }
1826 const int cp_size = cp->length();
1827 guarantee_property(valid_symbol_at(name_index),
1828 "Name index %u in %s has bad constant type in class file %s",
1829 name_index, tbl_name, CHECK_NULL);
1830 guarantee_property(valid_symbol_at(descriptor_index),
1831 "Signature index %u in %s has bad constant type in class file %s",
1832 descriptor_index, tbl_name, CHECK_NULL);
1833
1834 const Symbol* const name = cp->symbol_at(name_index);
1835 const Symbol* const sig = cp->symbol_at(descriptor_index);
1836 verify_legal_field_name(name, CHECK_NULL);
1837 u2 extra_slot = 0;
1838 if (!isLVTT) {
1839 verify_legal_field_signature(name, sig, CHECK_NULL);
1840
1841 // 4894874: check special cases for double and long local variables
1842 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1843 sig == vmSymbols::type_signature(T_LONG)) {
1844 extra_slot = 1;
1845 }
1846 }
1847 guarantee_property((index + extra_slot) < max_locals,
1848 "Invalid index %u in %s in class file %s",
1849 index, tbl_name, CHECK_NULL);
1850 }
1851 }
1852 return localvariable_table_start;
1853 }
1854
1855
1856 void ClassFileParser::parse_type_array(u2 array_length,
1857 u4 code_length,
1858 u4* const u1_index,
1859 u4* const u2_index,
1860 u1* const u1_array,
1861 u2* const u2_array,
1862 TRAPS) {
1863 const ClassFileStream* const cfs = _stream;
1864 u2 index = 0; // index in the array with long/double occupying two slots
1865 u4 i1 = *u1_index;
1866 u4 i2 = *u2_index + 1;
1867 for(int i = 0; i < array_length; i++) {
1868 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1869 index++;
1870 if (tag == ITEM_Long || tag == ITEM_Double) {
1871 index++;
1872 } else if (tag == ITEM_Object) {
1873 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1874 guarantee_property(valid_klass_reference_at(class_index),
1875 "Bad class index %u in StackMap in class file %s",
1876 class_index, CHECK);
1877 } else if (tag == ITEM_Uninitialized) {
1878 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1879 guarantee_property(
1880 offset < code_length,
1881 "Bad uninitialized type offset %u in StackMap in class file %s",
1882 offset, CHECK);
1883 } else {
1884 guarantee_property(
1885 tag <= (u1)ITEM_Uninitialized,
1886 "Unknown variable type %u in StackMap in class file %s",
1887 tag, CHECK);
1888 }
1889 }
1890 u2_array[*u2_index] = index;
1891 *u1_index = i1;
1892 *u2_index = i2;
1893 }
1894
1895 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1896 u4 code_attribute_length,
1897 bool need_verify,
1898 TRAPS) {
1899 assert(cfs != NULL, "invariant");
1900
1901 if (0 == code_attribute_length) {
1902 return NULL;
1903 }
1904
1905 const u1* const stackmap_table_start = cfs->get_u1_buffer();
1906 assert(stackmap_table_start != NULL, "null stackmap table");
1907
1908 // check code_attribute_length first
1909 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1910
1911 if (!need_verify && !DumpSharedSpaces) {
1912 return NULL;
1913 }
1914 return stackmap_table_start;
1915 }
1916
1917 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1918 u2* const checked_exceptions_length,
1919 u4 method_attribute_length,
1920 TRAPS) {
1921 assert(cfs != NULL, "invariant");
1922 assert(checked_exceptions_length != NULL, "invariant");
1923
1924 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1925 *checked_exceptions_length = cfs->get_u2_fast();
1926 const unsigned int size =
1927 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1928 const u2* const checked_exceptions_start = cfs->get_u2_buffer();
1929 assert(checked_exceptions_start != NULL, "null checked exceptions");
1930 if (!_need_verify) {
1931 cfs->skip_u2_fast(size);
1932 } else {
1933 // Verify each value in the checked exception table
1934 u2 checked_exception;
1935 const u2 len = *checked_exceptions_length;
1936 cfs->guarantee_more(2 * len, CHECK_NULL);
1937 for (int i = 0; i < len; i++) {
1938 checked_exception = cfs->get_u2_fast();
1939 check_property(
1940 valid_klass_reference_at(checked_exception),
1941 "Exception name has bad type at constant pool %u in class file %s",
1942 checked_exception, CHECK_NULL);
1943 }
1944 }
1945 // check exceptions attribute length
1946 if (_need_verify) {
1947 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1948 sizeof(u2) * size),
1949 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1950 }
1951 return checked_exceptions_start;
1952 }
1953
1954 void ClassFileParser::throwIllegalSignature(const char* type,
1955 const Symbol* name,
1956 const Symbol* sig,
1957 TRAPS) const {
1958 assert(name != NULL, "invariant");
1959 assert(sig != NULL, "invariant");
1960
1961 ResourceMark rm(THREAD);
1962 Exceptions::fthrow(THREAD_AND_LOCATION,
1963 vmSymbols::java_lang_ClassFormatError(),
1964 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1965 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1966 }
1967
1968 AnnotationCollector::ID
1969 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1970 const Symbol* name) {
1971 const vmSymbols::SID sid = vmSymbols::find_sid(name);
1972 // Privileged code can use all annotations. Other code silently drops some.
1973 const bool privileged = loader_data->is_the_null_class_loader_data() ||
1974 loader_data->is_platform_class_loader_data() ||
1975 loader_data->is_anonymous();
1976 switch (sid) {
1977 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
1978 if (_location != _in_method) break; // only allow for methods
1979 if (!privileged) break; // only allow in privileged code
1980 return _method_CallerSensitive;
1981 }
1982 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1983 if (_location != _in_method) break; // only allow for methods
1984 if (!privileged) break; // only allow in privileged code
1985 return _method_ForceInline;
1986 }
1987 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
1988 if (_location != _in_method) break; // only allow for methods
1989 if (!privileged) break; // only allow in privileged code
1990 return _method_DontInline;
1991 }
1992 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1993 if (_location != _in_method) break; // only allow for methods
1994 if (!privileged) break; // only allow in privileged code
1995 return _method_InjectedProfile;
1996 }
1997 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
1998 if (_location != _in_method) break; // only allow for methods
1999 if (!privileged) break; // only allow in privileged code
2000 return _method_LambdaForm_Compiled;
2001 }
2002 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
2003 if (_location != _in_method) break; // only allow for methods
2004 if (!privileged) break; // only allow in privileged code
2005 return _method_LambdaForm_Hidden;
2006 }
2007 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2008 if (_location != _in_method) break; // only allow for methods
2009 if (!privileged) break; // only allow in privileged code
2010 return _method_HotSpotIntrinsicCandidate;
2011 }
2012 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2013 if (_location != _in_field) break; // only allow for fields
2014 if (!privileged) break; // only allow in privileged code
2015 return _field_Stable;
2016 }
2017 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2018 if (_location != _in_field && _location != _in_class) {
2019 break; // only allow for fields and classes
2020 }
2021 if (!EnableContended || (RestrictContended && !privileged)) {
2022 break; // honor privileges
2023 }
2024 return _jdk_internal_vm_annotation_Contended;
2025 }
2026 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2027 if (_location != _in_method) break; // only allow for methods
2028 if (RestrictReservedStack && !privileged) break; // honor privileges
2029 return _jdk_internal_vm_annotation_ReservedStackAccess;
2030 }
2031 default: {
2032 break;
2033 }
2034 }
2035 return AnnotationCollector::_unknown;
2036 }
2037
2038 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2039 if (is_contended())
2040 f->set_contended_group(contended_group());
2041 if (is_stable())
2042 f->set_stable(true);
2043 }
2044
2045 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2046 // If there's an error deallocate metadata for field annotations
2047 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2048 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2049 }
2050
2051 void MethodAnnotationCollector::apply_to(methodHandle m) {
2052 if (has_annotation(_method_CallerSensitive))
2053 m->set_caller_sensitive(true);
2054 if (has_annotation(_method_ForceInline))
2055 m->set_force_inline(true);
2056 if (has_annotation(_method_DontInline))
2057 m->set_dont_inline(true);
2058 if (has_annotation(_method_InjectedProfile))
2059 m->set_has_injected_profile(true);
2060 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2061 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2062 if (has_annotation(_method_LambdaForm_Hidden))
2063 m->set_hidden(true);
2064 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2065 m->set_intrinsic_candidate(true);
2066 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2067 m->set_has_reserved_stack_access(true);
2068 }
2069
2070 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2071 assert(ik != NULL, "invariant");
2072 ik->set_is_contended(is_contended());
2073 }
2074
2075 #define MAX_ARGS_SIZE 255
2076 #define MAX_CODE_SIZE 65535
2077 #define INITIAL_MAX_LVT_NUMBER 256
2078
2079 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2080 *
2081 * Rules for LVT's and LVTT's are:
2082 * - There can be any number of LVT's and LVTT's.
2083 * - If there are n LVT's, it is the same as if there was just
2084 * one LVT containing all the entries from the n LVT's.
2085 * - There may be no more than one LVT entry per local variable.
2086 * Two LVT entries are 'equal' if these fields are the same:
2087 * start_pc, length, name, slot
2088 * - There may be no more than one LVTT entry per each LVT entry.
2089 * Each LVTT entry has to match some LVT entry.
2090 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2091 */
2092 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2093 int lvt_cnt,
2094 u2* const localvariable_table_length,
2095 const u2**const localvariable_table_start,
2096 int lvtt_cnt,
2097 u2* const localvariable_type_table_length,
2098 const u2**const localvariable_type_table_start,
2099 TRAPS) {
2100
2101 ResourceMark rm(THREAD);
2102
2103 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2104 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2105
2106 LVT_HashTable* const table = new LVT_HashTable();
2107
2108 // To fill LocalVariableTable in
2109 const Classfile_LVT_Element* cf_lvt;
2110 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2111
2112 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2113 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2114 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2115 copy_lvt_element(&cf_lvt[idx], lvt);
2116 // If no duplicates, add LVT elem in hashtable.
2117 if (table->put(*lvt, lvt) == false
2118 && _need_verify
2119 && _major_version >= JAVA_1_5_VERSION) {
2120 classfile_parse_error("Duplicated LocalVariableTable attribute "
2121 "entry for '%s' in class file %s",
2122 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2123 CHECK);
2124 }
2125 }
2126 }
2127
2128 // To merge LocalVariableTable and LocalVariableTypeTable
2129 const Classfile_LVT_Element* cf_lvtt;
2130 LocalVariableTableElement lvtt_elem;
2131
2132 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2133 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2134 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2135 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2136 LocalVariableTableElement** entry = table->get(lvtt_elem);
2137 if (entry == NULL) {
2138 if (_need_verify) {
2139 classfile_parse_error("LVTT entry for '%s' in class file %s "
2140 "does not match any LVT entry",
2141 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2142 CHECK);
2143 }
2144 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2145 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2146 "entry for '%s' in class file %s",
2147 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2148 CHECK);
2149 } else {
2150 // to add generic signatures into LocalVariableTable
2151 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2152 }
2153 }
2154 }
2155 }
2156
2157
2158 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2159 const u1* runtime_visible_annotations,
2160 int runtime_visible_annotations_length,
2161 const u1* runtime_invisible_annotations,
2162 int runtime_invisible_annotations_length,
2163 const u1* runtime_visible_parameter_annotations,
2164 int runtime_visible_parameter_annotations_length,
2165 const u1* runtime_invisible_parameter_annotations,
2166 int runtime_invisible_parameter_annotations_length,
2167 const u1* runtime_visible_type_annotations,
2168 int runtime_visible_type_annotations_length,
2169 const u1* runtime_invisible_type_annotations,
2170 int runtime_invisible_type_annotations_length,
2171 const u1* annotation_default,
2172 int annotation_default_length,
2173 TRAPS) {
2174
2175 AnnotationArray* a;
2176
2177 if (runtime_visible_annotations_length +
2178 runtime_invisible_annotations_length > 0) {
2179 a = assemble_annotations(runtime_visible_annotations,
2180 runtime_visible_annotations_length,
2181 runtime_invisible_annotations,
2182 runtime_invisible_annotations_length,
2183 CHECK);
2184 cm->set_method_annotations(a);
2185 }
2186
2187 if (runtime_visible_parameter_annotations_length +
2188 runtime_invisible_parameter_annotations_length > 0) {
2189 a = assemble_annotations(runtime_visible_parameter_annotations,
2190 runtime_visible_parameter_annotations_length,
2191 runtime_invisible_parameter_annotations,
2192 runtime_invisible_parameter_annotations_length,
2193 CHECK);
2194 cm->set_parameter_annotations(a);
2195 }
2196
2197 if (annotation_default_length > 0) {
2198 a = assemble_annotations(annotation_default,
2199 annotation_default_length,
2200 NULL,
2201 0,
2202 CHECK);
2203 cm->set_default_annotations(a);
2204 }
2205
2206 if (runtime_visible_type_annotations_length +
2207 runtime_invisible_type_annotations_length > 0) {
2208 a = assemble_annotations(runtime_visible_type_annotations,
2209 runtime_visible_type_annotations_length,
2210 runtime_invisible_type_annotations,
2211 runtime_invisible_type_annotations_length,
2212 CHECK);
2213 cm->set_type_annotations(a);
2214 }
2215 }
2216
2217
2218 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2219 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2220 // Method* to save footprint, so we only know the size of the resulting Method* when the
2221 // entire method attribute is parsed.
2222 //
2223 // The promoted_flags parameter is used to pass relevant access_flags
2224 // from the method back up to the containing klass. These flag values
2225 // are added to klass's access_flags.
2226
2227 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2228 bool is_interface,
2229 const ConstantPool* cp,
2230 AccessFlags* const promoted_flags,
2231 TRAPS) {
2232 assert(cfs != NULL, "invariant");
2233 assert(cp != NULL, "invariant");
2234 assert(promoted_flags != NULL, "invariant");
2235
2236 ResourceMark rm(THREAD);
2237 // Parse fixed parts:
2238 // access_flags, name_index, descriptor_index, attributes_count
2239 cfs->guarantee_more(8, CHECK_NULL);
2240
2241 int flags = cfs->get_u2_fast();
2242 const u2 name_index = cfs->get_u2_fast();
2243 const int cp_size = cp->length();
2244 check_property(
2245 valid_symbol_at(name_index),
2246 "Illegal constant pool index %u for method name in class file %s",
2247 name_index, CHECK_NULL);
2248 const Symbol* const name = cp->symbol_at(name_index);
2249 verify_legal_method_name(name, CHECK_NULL);
2250
2251 const u2 signature_index = cfs->get_u2_fast();
2252 guarantee_property(
2253 valid_symbol_at(signature_index),
2254 "Illegal constant pool index %u for method signature in class file %s",
2255 signature_index, CHECK_NULL);
2256 const Symbol* const signature = cp->symbol_at(signature_index);
2257
2258 if (name == vmSymbols::class_initializer_name()) {
2259 // We ignore the other access flags for a valid class initializer.
2260 // (JVM Spec 2nd ed., chapter 4.6)
2261 if (_major_version < 51) { // backward compatibility
2262 flags = JVM_ACC_STATIC;
2263 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2264 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2265 } else {
2266 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2267 }
2268 } else {
2269 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2270 }
2271
2272 if (name == vmSymbols::object_initializer_name() && is_interface) {
2273 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2274 }
2275
2276 int args_size = -1; // only used when _need_verify is true
2277 if (_need_verify) {
2278 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2279 verify_legal_method_signature(name, signature, CHECK_NULL);
2280 if (args_size > MAX_ARGS_SIZE) {
2281 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2282 }
2283 }
2284
2285 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2286
2287 // Default values for code and exceptions attribute elements
2288 u2 max_stack = 0;
2289 u2 max_locals = 0;
2290 u4 code_length = 0;
2291 const u1* code_start = 0;
2292 u2 exception_table_length = 0;
2293 const u2* exception_table_start = NULL;
2294 Array<int>* exception_handlers = Universe::the_empty_int_array();
2295 u2 checked_exceptions_length = 0;
2296 const u2* checked_exceptions_start = NULL;
2297 CompressedLineNumberWriteStream* linenumber_table = NULL;
2298 int linenumber_table_length = 0;
2299 int total_lvt_length = 0;
2300 u2 lvt_cnt = 0;
2301 u2 lvtt_cnt = 0;
2302 bool lvt_allocated = false;
2303 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2304 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2305 u2* localvariable_table_length = NULL;
2306 const u2** localvariable_table_start = NULL;
2307 u2* localvariable_type_table_length = NULL;
2308 const u2** localvariable_type_table_start = NULL;
2309 int method_parameters_length = -1;
2310 const u1* method_parameters_data = NULL;
2311 bool method_parameters_seen = false;
2312 bool parsed_code_attribute = false;
2313 bool parsed_checked_exceptions_attribute = false;
2314 bool parsed_stackmap_attribute = false;
2315 // stackmap attribute - JDK1.5
2316 const u1* stackmap_data = NULL;
2317 int stackmap_data_length = 0;
2318 u2 generic_signature_index = 0;
2319 MethodAnnotationCollector parsed_annotations;
2320 const u1* runtime_visible_annotations = NULL;
2321 int runtime_visible_annotations_length = 0;
2322 const u1* runtime_invisible_annotations = NULL;
2323 int runtime_invisible_annotations_length = 0;
2324 const u1* runtime_visible_parameter_annotations = NULL;
2325 int runtime_visible_parameter_annotations_length = 0;
2326 const u1* runtime_invisible_parameter_annotations = NULL;
2327 int runtime_invisible_parameter_annotations_length = 0;
2328 const u1* runtime_visible_type_annotations = NULL;
2329 int runtime_visible_type_annotations_length = 0;
2330 const u1* runtime_invisible_type_annotations = NULL;
2331 int runtime_invisible_type_annotations_length = 0;
2332 bool runtime_invisible_annotations_exists = false;
2333 bool runtime_invisible_type_annotations_exists = false;
2334 bool runtime_invisible_parameter_annotations_exists = false;
2335 const u1* annotation_default = NULL;
2336 int annotation_default_length = 0;
2337
2338 // Parse code and exceptions attribute
2339 u2 method_attributes_count = cfs->get_u2_fast();
2340 while (method_attributes_count--) {
2341 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2342 const u2 method_attribute_name_index = cfs->get_u2_fast();
2343 const u4 method_attribute_length = cfs->get_u4_fast();
2344 check_property(
2345 valid_symbol_at(method_attribute_name_index),
2346 "Invalid method attribute name index %u in class file %s",
2347 method_attribute_name_index, CHECK_NULL);
2348
2349 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2350 if (method_attribute_name == vmSymbols::tag_code()) {
2351 // Parse Code attribute
2352 if (_need_verify) {
2353 guarantee_property(
2354 !access_flags.is_native() && !access_flags.is_abstract(),
2355 "Code attribute in native or abstract methods in class file %s",
2356 CHECK_NULL);
2357 }
2358 if (parsed_code_attribute) {
2359 classfile_parse_error("Multiple Code attributes in class file %s",
2360 CHECK_NULL);
2361 }
2362 parsed_code_attribute = true;
2363
2364 // Stack size, locals size, and code size
2365 if (_major_version == 45 && _minor_version <= 2) {
2366 cfs->guarantee_more(4, CHECK_NULL);
2367 max_stack = cfs->get_u1_fast();
2368 max_locals = cfs->get_u1_fast();
2369 code_length = cfs->get_u2_fast();
2370 } else {
2371 cfs->guarantee_more(8, CHECK_NULL);
2372 max_stack = cfs->get_u2_fast();
2373 max_locals = cfs->get_u2_fast();
2374 code_length = cfs->get_u4_fast();
2375 }
2376 if (_need_verify) {
2377 guarantee_property(args_size <= max_locals,
2378 "Arguments can't fit into locals in class file %s",
2379 CHECK_NULL);
2380 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2381 "Invalid method Code length %u in class file %s",
2382 code_length, CHECK_NULL);
2383 }
2384 // Code pointer
2385 code_start = cfs->get_u1_buffer();
2386 assert(code_start != NULL, "null code start");
2387 cfs->guarantee_more(code_length, CHECK_NULL);
2388 cfs->skip_u1_fast(code_length);
2389
2390 // Exception handler table
2391 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2392 exception_table_length = cfs->get_u2_fast();
2393 if (exception_table_length > 0) {
2394 exception_table_start = parse_exception_table(cfs,
2395 code_length,
2396 exception_table_length,
2397 CHECK_NULL);
2398 }
2399
2400 // Parse additional attributes in code attribute
2401 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2402 u2 code_attributes_count = cfs->get_u2_fast();
2403
2404 unsigned int calculated_attribute_length = 0;
2405
2406 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2407 calculated_attribute_length =
2408 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2409 } else {
2410 // max_stack, locals and length are smaller in pre-version 45.2 classes
2411 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2412 }
2413 calculated_attribute_length +=
2414 code_length +
2415 sizeof(exception_table_length) +
2416 sizeof(code_attributes_count) +
2417 exception_table_length *
2418 ( sizeof(u2) + // start_pc
2419 sizeof(u2) + // end_pc
2420 sizeof(u2) + // handler_pc
2421 sizeof(u2) ); // catch_type_index
2422
2423 while (code_attributes_count--) {
2424 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2425 const u2 code_attribute_name_index = cfs->get_u2_fast();
2426 const u4 code_attribute_length = cfs->get_u4_fast();
2427 calculated_attribute_length += code_attribute_length +
2428 sizeof(code_attribute_name_index) +
2429 sizeof(code_attribute_length);
2430 check_property(valid_symbol_at(code_attribute_name_index),
2431 "Invalid code attribute name index %u in class file %s",
2432 code_attribute_name_index,
2433 CHECK_NULL);
2434 if (LoadLineNumberTables &&
2435 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2436 // Parse and compress line number table
2437 parse_linenumber_table(code_attribute_length,
2438 code_length,
2439 &linenumber_table,
2440 CHECK_NULL);
2441
2442 } else if (LoadLocalVariableTables &&
2443 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2444 // Parse local variable table
2445 if (!lvt_allocated) {
2446 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2447 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2448 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2449 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2450 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2451 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2452 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2453 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2454 lvt_allocated = true;
2455 }
2456 if (lvt_cnt == max_lvt_cnt) {
2457 max_lvt_cnt <<= 1;
2458 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2459 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2460 }
2461 localvariable_table_start[lvt_cnt] =
2462 parse_localvariable_table(cfs,
2463 code_length,
2464 max_locals,
2465 code_attribute_length,
2466 &localvariable_table_length[lvt_cnt],
2467 false, // is not LVTT
2468 CHECK_NULL);
2469 total_lvt_length += localvariable_table_length[lvt_cnt];
2470 lvt_cnt++;
2471 } else if (LoadLocalVariableTypeTables &&
2472 _major_version >= JAVA_1_5_VERSION &&
2473 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2474 if (!lvt_allocated) {
2475 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2476 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2477 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2478 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2479 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2480 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2481 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2482 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2483 lvt_allocated = true;
2484 }
2485 // Parse local variable type table
2486 if (lvtt_cnt == max_lvtt_cnt) {
2487 max_lvtt_cnt <<= 1;
2488 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2489 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2490 }
2491 localvariable_type_table_start[lvtt_cnt] =
2492 parse_localvariable_table(cfs,
2493 code_length,
2494 max_locals,
2495 code_attribute_length,
2496 &localvariable_type_table_length[lvtt_cnt],
2497 true, // is LVTT
2498 CHECK_NULL);
2499 lvtt_cnt++;
2500 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2501 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2502 // Stack map is only needed by the new verifier in JDK1.5.
2503 if (parsed_stackmap_attribute) {
2504 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2505 }
2506 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2507 stackmap_data_length = code_attribute_length;
2508 parsed_stackmap_attribute = true;
2509 } else {
2510 // Skip unknown attributes
2511 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2512 }
2513 }
2514 // check method attribute length
2515 if (_need_verify) {
2516 guarantee_property(method_attribute_length == calculated_attribute_length,
2517 "Code segment has wrong length in class file %s",
2518 CHECK_NULL);
2519 }
2520 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2521 // Parse Exceptions attribute
2522 if (parsed_checked_exceptions_attribute) {
2523 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2524 CHECK_NULL);
2525 }
2526 parsed_checked_exceptions_attribute = true;
2527 checked_exceptions_start =
2528 parse_checked_exceptions(cfs,
2529 &checked_exceptions_length,
2530 method_attribute_length,
2531 CHECK_NULL);
2532 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2533 // reject multiple method parameters
2534 if (method_parameters_seen) {
2535 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2536 CHECK_NULL);
2537 }
2538 method_parameters_seen = true;
2539 method_parameters_length = cfs->get_u1_fast();
2540 const u2 real_length = (method_parameters_length * 4u) + 1u;
2541 if (method_attribute_length != real_length) {
2542 classfile_parse_error(
2543 "Invalid MethodParameters method attribute length %u in class file",
2544 method_attribute_length, CHECK_NULL);
2545 }
2546 method_parameters_data = cfs->get_u1_buffer();
2547 cfs->skip_u2_fast(method_parameters_length);
2548 cfs->skip_u2_fast(method_parameters_length);
2549 // ignore this attribute if it cannot be reflected
2550 if (!SystemDictionary::Parameter_klass_loaded())
2551 method_parameters_length = -1;
2552 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2553 if (method_attribute_length != 0) {
2554 classfile_parse_error(
2555 "Invalid Synthetic method attribute length %u in class file %s",
2556 method_attribute_length, CHECK_NULL);
2557 }
2558 // Should we check that there hasn't already been a synthetic attribute?
2559 access_flags.set_is_synthetic();
2560 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2561 if (method_attribute_length != 0) {
2562 classfile_parse_error(
2563 "Invalid Deprecated method attribute length %u in class file %s",
2564 method_attribute_length, CHECK_NULL);
2565 }
2566 } else if (_major_version >= JAVA_1_5_VERSION) {
2567 if (method_attribute_name == vmSymbols::tag_signature()) {
2568 if (method_attribute_length != 2) {
2569 classfile_parse_error(
2570 "Invalid Signature attribute length %u in class file %s",
2571 method_attribute_length, CHECK_NULL);
2572 }
2573 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2574 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2575 if (runtime_visible_annotations != NULL) {
2576 classfile_parse_error(
2577 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2578 CHECK_NULL);
2579 }
2580 runtime_visible_annotations_length = method_attribute_length;
2581 runtime_visible_annotations = cfs->get_u1_buffer();
2582 assert(runtime_visible_annotations != NULL, "null visible annotations");
2583 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2584 parse_annotations(cp,
2585 runtime_visible_annotations,
2586 runtime_visible_annotations_length,
2587 &parsed_annotations,
2588 _loader_data,
2589 CHECK_NULL);
2590 cfs->skip_u1_fast(runtime_visible_annotations_length);
2591 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2592 if (runtime_invisible_annotations_exists) {
2593 classfile_parse_error(
2594 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2595 CHECK_NULL);
2596 }
2597 runtime_invisible_annotations_exists = true;
2598 if (PreserveAllAnnotations) {
2599 runtime_invisible_annotations_length = method_attribute_length;
2600 runtime_invisible_annotations = cfs->get_u1_buffer();
2601 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2602 }
2603 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2604 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2605 if (runtime_visible_parameter_annotations != NULL) {
2606 classfile_parse_error(
2607 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2608 CHECK_NULL);
2609 }
2610 runtime_visible_parameter_annotations_length = method_attribute_length;
2611 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2612 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2613 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2614 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2615 if (runtime_invisible_parameter_annotations_exists) {
2616 classfile_parse_error(
2617 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2618 CHECK_NULL);
2619 }
2620 runtime_invisible_parameter_annotations_exists = true;
2621 if (PreserveAllAnnotations) {
2622 runtime_invisible_parameter_annotations_length = method_attribute_length;
2623 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2624 assert(runtime_invisible_parameter_annotations != NULL,
2625 "null invisible parameter annotations");
2626 }
2627 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2628 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2629 if (annotation_default != NULL) {
2630 classfile_parse_error(
2631 "Multiple AnnotationDefault attributes for method in class file %s",
2632 CHECK_NULL);
2633 }
2634 annotation_default_length = method_attribute_length;
2635 annotation_default = cfs->get_u1_buffer();
2636 assert(annotation_default != NULL, "null annotation default");
2637 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2638 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2639 if (runtime_visible_type_annotations != NULL) {
2640 classfile_parse_error(
2641 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2642 CHECK_NULL);
2643 }
2644 runtime_visible_type_annotations_length = method_attribute_length;
2645 runtime_visible_type_annotations = cfs->get_u1_buffer();
2646 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2647 // No need for the VM to parse Type annotations
2648 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2649 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2650 if (runtime_invisible_type_annotations_exists) {
2651 classfile_parse_error(
2652 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2653 CHECK_NULL);
2654 } else {
2655 runtime_invisible_type_annotations_exists = true;
2656 }
2657 if (PreserveAllAnnotations) {
2658 runtime_invisible_type_annotations_length = method_attribute_length;
2659 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2660 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2661 }
2662 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2663 } else {
2664 // Skip unknown attributes
2665 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2666 }
2667 } else {
2668 // Skip unknown attributes
2669 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2670 }
2671 }
2672
2673 if (linenumber_table != NULL) {
2674 linenumber_table->write_terminator();
2675 linenumber_table_length = linenumber_table->position();
2676 }
2677
2678 // Make sure there's at least one Code attribute in non-native/non-abstract method
2679 if (_need_verify) {
2680 guarantee_property(access_flags.is_native() ||
2681 access_flags.is_abstract() ||
2682 parsed_code_attribute,
2683 "Absent Code attribute in method that is not native or abstract in class file %s",
2684 CHECK_NULL);
2685 }
2686
2687 // All sizing information for a Method* is finally available, now create it
2688 InlineTableSizes sizes(
2689 total_lvt_length,
2690 linenumber_table_length,
2691 exception_table_length,
2692 checked_exceptions_length,
2693 method_parameters_length,
2694 generic_signature_index,
2695 runtime_visible_annotations_length +
2696 runtime_invisible_annotations_length,
2697 runtime_visible_parameter_annotations_length +
2698 runtime_invisible_parameter_annotations_length,
2699 runtime_visible_type_annotations_length +
2700 runtime_invisible_type_annotations_length,
2701 annotation_default_length,
2702 0);
2703
2704 Method* const m = Method::allocate(_loader_data,
2705 code_length,
2706 access_flags,
2707 &sizes,
2708 ConstMethod::NORMAL,
2709 CHECK_NULL);
2710
2711 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2712
2713 // Fill in information from fixed part (access_flags already set)
2714 m->set_constants(_cp);
2715 m->set_name_index(name_index);
2716 m->set_signature_index(signature_index);
2717
2718 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2719 m->constMethod()->set_result_type(rtf.type());
2720
2721 if (args_size >= 0) {
2722 m->set_size_of_parameters(args_size);
2723 } else {
2724 m->compute_size_of_parameters(THREAD);
2725 }
2726 #ifdef ASSERT
2727 if (args_size >= 0) {
2728 m->compute_size_of_parameters(THREAD);
2729 assert(args_size == m->size_of_parameters(), "");
2730 }
2731 #endif
2732
2733 // Fill in code attribute information
2734 m->set_max_stack(max_stack);
2735 m->set_max_locals(max_locals);
2736 if (stackmap_data != NULL) {
2737 m->constMethod()->copy_stackmap_data(_loader_data,
2738 (u1*)stackmap_data,
2739 stackmap_data_length,
2740 CHECK_NULL);
2741 }
2742
2743 // Copy byte codes
2744 m->set_code((u1*)code_start);
2745
2746 // Copy line number table
2747 if (linenumber_table != NULL) {
2748 memcpy(m->compressed_linenumber_table(),
2749 linenumber_table->buffer(),
2750 linenumber_table_length);
2751 }
2752
2753 // Copy exception table
2754 if (exception_table_length > 0) {
2755 int size =
2756 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2757 copy_u2_with_conversion((u2*) m->exception_table_start(),
2758 exception_table_start, size);
2759 }
2760
2761 // Copy method parameters
2762 if (method_parameters_length > 0) {
2763 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2764 for (int i = 0; i < method_parameters_length; i++) {
2765 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2766 method_parameters_data += 2;
2767 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2768 method_parameters_data += 2;
2769 }
2770 }
2771
2772 // Copy checked exceptions
2773 if (checked_exceptions_length > 0) {
2774 const int size =
2775 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2776 copy_u2_with_conversion((u2*) m->checked_exceptions_start(),
2777 checked_exceptions_start,
2778 size);
2779 }
2780
2781 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2782 if (total_lvt_length > 0) {
2783 promoted_flags->set_has_localvariable_table();
2784 copy_localvariable_table(m->constMethod(),
2785 lvt_cnt,
2786 localvariable_table_length,
2787 localvariable_table_start,
2788 lvtt_cnt,
2789 localvariable_type_table_length,
2790 localvariable_type_table_start,
2791 CHECK_NULL);
2792 }
2793
2794 if (parsed_annotations.has_any_annotations())
2795 parsed_annotations.apply_to(m);
2796
2797 // Copy annotations
2798 copy_method_annotations(m->constMethod(),
2799 runtime_visible_annotations,
2800 runtime_visible_annotations_length,
2801 runtime_invisible_annotations,
2802 runtime_invisible_annotations_length,
2803 runtime_visible_parameter_annotations,
2804 runtime_visible_parameter_annotations_length,
2805 runtime_invisible_parameter_annotations,
2806 runtime_invisible_parameter_annotations_length,
2807 runtime_visible_type_annotations,
2808 runtime_visible_type_annotations_length,
2809 runtime_invisible_type_annotations,
2810 runtime_invisible_type_annotations_length,
2811 annotation_default,
2812 annotation_default_length,
2813 CHECK_NULL);
2814
2815 if (name == vmSymbols::finalize_method_name() &&
2816 signature == vmSymbols::void_method_signature()) {
2817 if (m->is_empty_method()) {
2818 _has_empty_finalizer = true;
2819 } else {
2820 _has_finalizer = true;
2821 }
2822 }
2823 if (name == vmSymbols::object_initializer_name() &&
2824 signature == vmSymbols::void_method_signature() &&
2825 m->is_vanilla_constructor()) {
2826 _has_vanilla_constructor = true;
2827 }
2828
2829 NOT_PRODUCT(m->verify());
2830 return m;
2831 }
2832
2833
2834 // The promoted_flags parameter is used to pass relevant access_flags
2835 // from the methods back up to the containing klass. These flag values
2836 // are added to klass's access_flags.
2837 // Side-effects: populates the _methods field in the parser
2838 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2839 bool is_interface,
2840 AccessFlags* promoted_flags,
2841 bool* has_final_method,
2842 bool* declares_nonstatic_concrete_methods,
2843 TRAPS) {
2844 assert(cfs != NULL, "invariant");
2845 assert(promoted_flags != NULL, "invariant");
2846 assert(has_final_method != NULL, "invariant");
2847 assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2848
2849 assert(NULL == _methods, "invariant");
2850
2851 cfs->guarantee_more(2, CHECK); // length
2852 const u2 length = cfs->get_u2_fast();
2853 if (length == 0) {
2854 _methods = Universe::the_empty_method_array();
2855 } else {
2856 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2857 length,
2858 NULL,
2859 CHECK);
2860
2861 HandleMark hm(THREAD);
2862 for (int index = 0; index < length; index++) {
2863 Method* method = parse_method(cfs,
2864 is_interface,
2865 _cp,
2866 promoted_flags,
2867 CHECK);
2868
2869 if (method->is_final()) {
2870 *has_final_method = true;
2871 }
2872 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2873 // used for interface initialization, and default method inheritance analysis
2874 if (is_interface && !(*declares_nonstatic_concrete_methods)
2875 && !method->is_abstract() && !method->is_static()) {
2876 *declares_nonstatic_concrete_methods = true;
2877 }
2878 _methods->at_put(index, method);
2879 }
2880
2881 if (_need_verify && length > 1) {
2882 // Check duplicated methods
2883 ResourceMark rm(THREAD);
2884 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2885 THREAD, NameSigHash*, HASH_ROW_SIZE);
2886 initialize_hashtable(names_and_sigs);
2887 bool dup = false;
2888 {
2889 debug_only(NoSafepointVerifier nsv;)
2890 for (int i = 0; i < length; i++) {
2891 const Method* const m = _methods->at(i);
2892 // If no duplicates, add name/signature in hashtable names_and_sigs.
2893 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2894 dup = true;
2895 break;
2896 }
2897 }
2898 }
2899 if (dup) {
2900 classfile_parse_error("Duplicate method name&signature in class file %s",
2901 CHECK);
2902 }
2903 }
2904 }
2905 }
2906
2907 static const intArray* sort_methods(Array<Method*>* methods) {
2908 const int length = methods->length();
2909 // If JVMTI original method ordering or sharing is enabled we have to
2910 // remember the original class file ordering.
2911 // We temporarily use the vtable_index field in the Method* to store the
2912 // class file index, so we can read in after calling qsort.
2913 // Put the method ordering in the shared archive.
2914 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2915 for (int index = 0; index < length; index++) {
2916 Method* const m = methods->at(index);
2917 assert(!m->valid_vtable_index(), "vtable index should not be set");
2918 m->set_vtable_index(index);
2919 }
2920 }
2921 // Sort method array by ascending method name (for faster lookups & vtable construction)
2922 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2923 Method::sort_methods(methods);
2924
2925 intArray* method_ordering = NULL;
2926 // If JVMTI original method ordering or sharing is enabled construct int
2927 // array remembering the original ordering
2928 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2929 method_ordering = new intArray(length, length, -1);
2930 for (int index = 0; index < length; index++) {
2931 Method* const m = methods->at(index);
2932 const int old_index = m->vtable_index();
2933 assert(old_index >= 0 && old_index < length, "invalid method index");
2934 method_ordering->at_put(index, old_index);
2935 m->set_vtable_index(Method::invalid_vtable_index);
2936 }
2937 }
2938 return method_ordering;
2939 }
2940
2941 // Parse generic_signature attribute for methods and fields
2942 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2943 TRAPS) {
2944 assert(cfs != NULL, "invariant");
2945
2946 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2947 const u2 generic_signature_index = cfs->get_u2_fast();
2948 check_property(
2949 valid_symbol_at(generic_signature_index),
2950 "Invalid Signature attribute at constant pool index %u in class file %s",
2951 generic_signature_index, CHECK_0);
2952 return generic_signature_index;
2953 }
2954
2955 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2956 TRAPS) {
2957
2958 assert(cfs != NULL, "invariant");
2959
2960 cfs->guarantee_more(2, CHECK); // sourcefile_index
2961 const u2 sourcefile_index = cfs->get_u2_fast();
2962 check_property(
2963 valid_symbol_at(sourcefile_index),
2964 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2965 sourcefile_index, CHECK);
2966 set_class_sourcefile_index(sourcefile_index);
2967 }
2968
2969 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2970 int length,
2971 TRAPS) {
2972 assert(cfs != NULL, "invariant");
2973
2974 const u1* const sde_buffer = cfs->get_u1_buffer();
2975 assert(sde_buffer != NULL, "null sde buffer");
2976
2977 // Don't bother storing it if there is no way to retrieve it
2978 if (JvmtiExport::can_get_source_debug_extension()) {
2979 assert((length+1) > length, "Overflow checking");
2980 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2981 for (int i = 0; i < length; i++) {
2982 sde[i] = sde_buffer[i];
2983 }
2984 sde[length] = '\0';
2985 set_class_sde_buffer((const char*)sde, length);
2986 }
2987 // Got utf8 string, set stream position forward
2988 cfs->skip_u1(length, CHECK);
2989 }
2990
2991
2992 // Inner classes can be static, private or protected (classic VM does this)
2993 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
2994 JVM_ACC_PRIVATE | \
2995 JVM_ACC_PROTECTED | \
2996 JVM_ACC_STATIC \
2997 )
2998
2999 // Return number of classes in the inner classes attribute table
3000 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3001 const u1* const inner_classes_attribute_start,
3002 bool parsed_enclosingmethod_attribute,
3003 u2 enclosing_method_class_index,
3004 u2 enclosing_method_method_index,
3005 TRAPS) {
3006 const u1* const current_mark = cfs->current();
3007 u2 length = 0;
3008 if (inner_classes_attribute_start != NULL) {
3009 cfs->set_current(inner_classes_attribute_start);
3010 cfs->guarantee_more(2, CHECK_0); // length
3011 length = cfs->get_u2_fast();
3012 }
3013
3014 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3015 // method data:
3016 // [inner_class_info_index,
3017 // outer_class_info_index,
3018 // inner_name_index,
3019 // inner_class_access_flags,
3020 // ...
3021 // enclosing_method_class_index,
3022 // enclosing_method_method_index]
3023 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3024 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3025 _inner_classes = inner_classes;
3026
3027 int index = 0;
3028 const int cp_size = _cp->length();
3029 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3030 for (int n = 0; n < length; n++) {
3031 // Inner class index
3032 const u2 inner_class_info_index = cfs->get_u2_fast();
3033 check_property(
3034 valid_klass_reference_at(inner_class_info_index),
3035 "inner_class_info_index %u has bad constant type in class file %s",
3036 inner_class_info_index, CHECK_0);
3037 // Outer class index
3038 const u2 outer_class_info_index = cfs->get_u2_fast();
3039 check_property(
3040 outer_class_info_index == 0 ||
3041 valid_klass_reference_at(outer_class_info_index),
3042 "outer_class_info_index %u has bad constant type in class file %s",
3043 outer_class_info_index, CHECK_0);
3044 // Inner class name
3045 const u2 inner_name_index = cfs->get_u2_fast();
3046 check_property(
3047 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3048 "inner_name_index %u has bad constant type in class file %s",
3049 inner_name_index, CHECK_0);
3050 if (_need_verify) {
3051 guarantee_property(inner_class_info_index != outer_class_info_index,
3052 "Class is both outer and inner class in class file %s", CHECK_0);
3053 }
3054 // Access flags
3055 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3056 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3057 // Set abstract bit for old class files for backward compatibility
3058 flags |= JVM_ACC_ABSTRACT;
3059 }
3060 verify_legal_class_modifiers(flags, CHECK_0);
3061 AccessFlags inner_access_flags(flags);
3062
3063 inner_classes->at_put(index++, inner_class_info_index);
3064 inner_classes->at_put(index++, outer_class_info_index);
3065 inner_classes->at_put(index++, inner_name_index);
3066 inner_classes->at_put(index++, inner_access_flags.as_short());
3067 }
3068
3069 // 4347400: make sure there's no duplicate entry in the classes array
3070 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3071 for(int i = 0; i < length * 4; i += 4) {
3072 for(int j = i + 4; j < length * 4; j += 4) {
3073 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3074 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3075 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3076 inner_classes->at(i+3) != inner_classes->at(j+3)),
3077 "Duplicate entry in InnerClasses in class file %s",
3078 CHECK_0);
3079 }
3080 }
3081 }
3082
3083 // Set EnclosingMethod class and method indexes.
3084 if (parsed_enclosingmethod_attribute) {
3085 inner_classes->at_put(index++, enclosing_method_class_index);
3086 inner_classes->at_put(index++, enclosing_method_method_index);
3087 }
3088 assert(index == size, "wrong size");
3089
3090 // Restore buffer's current position.
3091 cfs->set_current(current_mark);
3092
3093 return length;
3094 }
3095
3096 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3097 set_class_synthetic_flag(true);
3098 }
3099
3100 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3101 assert(cfs != NULL, "invariant");
3102
3103 const u2 signature_index = cfs->get_u2(CHECK);
3104 check_property(
3105 valid_symbol_at(signature_index),
3106 "Invalid constant pool index %u in Signature attribute in class file %s",
3107 signature_index, CHECK);
3108 set_class_generic_signature_index(signature_index);
3109 }
3110
3111 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3112 ConstantPool* cp,
3113 u4 attribute_byte_length,
3114 TRAPS) {
3115 assert(cfs != NULL, "invariant");
3116 assert(cp != NULL, "invariant");
3117
3118 const u1* const current_start = cfs->current();
3119
3120 guarantee_property(attribute_byte_length >= sizeof(u2),
3121 "Invalid BootstrapMethods attribute length %u in class file %s",
3122 attribute_byte_length,
3123 CHECK);
3124
3125 cfs->guarantee_more(attribute_byte_length, CHECK);
3126
3127 const int attribute_array_length = cfs->get_u2_fast();
3128
3129 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3130 "Short length on BootstrapMethods in class file %s",
3131 CHECK);
3132
3133
3134 // The attribute contains a counted array of counted tuples of shorts,
3135 // represending bootstrap specifiers:
3136 // length*{bootstrap_method_index, argument_count*{argument_index}}
3137 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3138 // operand_count = number of shorts in attr, except for leading length
3139
3140 // The attribute is copied into a short[] array.
3141 // The array begins with a series of short[2] pairs, one for each tuple.
3142 const int index_size = (attribute_array_length * 2);
3143
3144 Array<u2>* const operands =
3145 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3146
3147 // Eagerly assign operands so they will be deallocated with the constant
3148 // pool if there is an error.
3149 cp->set_operands(operands);
3150
3151 int operand_fill_index = index_size;
3152 const int cp_size = cp->length();
3153
3154 for (int n = 0; n < attribute_array_length; n++) {
3155 // Store a 32-bit offset into the header of the operand array.
3156 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3157
3158 // Read a bootstrap specifier.
3159 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3160 const u2 bootstrap_method_index = cfs->get_u2_fast();
3161 const u2 argument_count = cfs->get_u2_fast();
3162 check_property(
3163 valid_cp_range(bootstrap_method_index, cp_size) &&
3164 cp->tag_at(bootstrap_method_index).is_method_handle(),
3165 "bootstrap_method_index %u has bad constant type in class file %s",
3166 bootstrap_method_index,
3167 CHECK);
3168
3169 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3170 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3171 CHECK);
3172
3173 operands->at_put(operand_fill_index++, bootstrap_method_index);
3174 operands->at_put(operand_fill_index++, argument_count);
3175
3176 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3177 for (int j = 0; j < argument_count; j++) {
3178 const u2 argument_index = cfs->get_u2_fast();
3179 check_property(
3180 valid_cp_range(argument_index, cp_size) &&
3181 cp->tag_at(argument_index).is_loadable_constant(),
3182 "argument_index %u has bad constant type in class file %s",
3183 argument_index,
3184 CHECK);
3185 operands->at_put(operand_fill_index++, argument_index);
3186 }
3187 }
3188 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3189 "Bad length on BootstrapMethods in class file %s",
3190 CHECK);
3191 }
3192
3193 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3194 ConstantPool* cp,
3195 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3196 TRAPS) {
3197 assert(cfs != NULL, "invariant");
3198 assert(cp != NULL, "invariant");
3199 assert(parsed_annotations != NULL, "invariant");
3200
3201 // Set inner classes attribute to default sentinel
3202 _inner_classes = Universe::the_empty_short_array();
3203 cfs->guarantee_more(2, CHECK); // attributes_count
3204 u2 attributes_count = cfs->get_u2_fast();
3205 bool parsed_sourcefile_attribute = false;
3206 bool parsed_innerclasses_attribute = false;
3207 bool parsed_enclosingmethod_attribute = false;
3208 bool parsed_bootstrap_methods_attribute = false;
3209 const u1* runtime_visible_annotations = NULL;
3210 int runtime_visible_annotations_length = 0;
3211 const u1* runtime_invisible_annotations = NULL;
3212 int runtime_invisible_annotations_length = 0;
3213 const u1* runtime_visible_type_annotations = NULL;
3214 int runtime_visible_type_annotations_length = 0;
3215 const u1* runtime_invisible_type_annotations = NULL;
3216 int runtime_invisible_type_annotations_length = 0;
3217 bool runtime_invisible_type_annotations_exists = false;
3218 bool runtime_invisible_annotations_exists = false;
3219 bool parsed_source_debug_ext_annotations_exist = false;
3220 const u1* inner_classes_attribute_start = NULL;
3221 u4 inner_classes_attribute_length = 0;
3222 u2 enclosing_method_class_index = 0;
3223 u2 enclosing_method_method_index = 0;
3224 // Iterate over attributes
3225 while (attributes_count--) {
3226 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3227 const u2 attribute_name_index = cfs->get_u2_fast();
3228 const u4 attribute_length = cfs->get_u4_fast();
3229 check_property(
3230 valid_symbol_at(attribute_name_index),
3231 "Attribute name has bad constant pool index %u in class file %s",
3232 attribute_name_index, CHECK);
3233 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3234 if (tag == vmSymbols::tag_source_file()) {
3235 // Check for SourceFile tag
3236 if (_need_verify) {
3237 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3238 }
3239 if (parsed_sourcefile_attribute) {
3240 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3241 } else {
3242 parsed_sourcefile_attribute = true;
3243 }
3244 parse_classfile_sourcefile_attribute(cfs, CHECK);
3245 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3246 // Check for SourceDebugExtension tag
3247 if (parsed_source_debug_ext_annotations_exist) {
3248 classfile_parse_error(
3249 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3250 }
3251 parsed_source_debug_ext_annotations_exist = true;
3252 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3253 } else if (tag == vmSymbols::tag_inner_classes()) {
3254 // Check for InnerClasses tag
3255 if (parsed_innerclasses_attribute) {
3256 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3257 } else {
3258 parsed_innerclasses_attribute = true;
3259 }
3260 inner_classes_attribute_start = cfs->get_u1_buffer();
3261 inner_classes_attribute_length = attribute_length;
3262 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3263 } else if (tag == vmSymbols::tag_synthetic()) {
3264 // Check for Synthetic tag
3265 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3266 if (attribute_length != 0) {
3267 classfile_parse_error(
3268 "Invalid Synthetic classfile attribute length %u in class file %s",
3269 attribute_length, CHECK);
3270 }
3271 parse_classfile_synthetic_attribute(CHECK);
3272 } else if (tag == vmSymbols::tag_deprecated()) {
3273 // Check for Deprecatd tag - 4276120
3274 if (attribute_length != 0) {
3275 classfile_parse_error(
3276 "Invalid Deprecated classfile attribute length %u in class file %s",
3277 attribute_length, CHECK);
3278 }
3279 } else if (_major_version >= JAVA_1_5_VERSION) {
3280 if (tag == vmSymbols::tag_signature()) {
3281 if (attribute_length != 2) {
3282 classfile_parse_error(
3283 "Wrong Signature attribute length %u in class file %s",
3284 attribute_length, CHECK);
3285 }
3286 parse_classfile_signature_attribute(cfs, CHECK);
3287 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3288 if (runtime_visible_annotations != NULL) {
3289 classfile_parse_error(
3290 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3291 }
3292 runtime_visible_annotations_length = attribute_length;
3293 runtime_visible_annotations = cfs->get_u1_buffer();
3294 assert(runtime_visible_annotations != NULL, "null visible annotations");
3295 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3296 parse_annotations(cp,
3297 runtime_visible_annotations,
3298 runtime_visible_annotations_length,
3299 parsed_annotations,
3300 _loader_data,
3301 CHECK);
3302 cfs->skip_u1_fast(runtime_visible_annotations_length);
3303 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3304 if (runtime_invisible_annotations_exists) {
3305 classfile_parse_error(
3306 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3307 }
3308 runtime_invisible_annotations_exists = true;
3309 if (PreserveAllAnnotations) {
3310 runtime_invisible_annotations_length = attribute_length;
3311 runtime_invisible_annotations = cfs->get_u1_buffer();
3312 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3313 }
3314 cfs->skip_u1(attribute_length, CHECK);
3315 } else if (tag == vmSymbols::tag_enclosing_method()) {
3316 if (parsed_enclosingmethod_attribute) {
3317 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3318 } else {
3319 parsed_enclosingmethod_attribute = true;
3320 }
3321 guarantee_property(attribute_length == 4,
3322 "Wrong EnclosingMethod attribute length %u in class file %s",
3323 attribute_length, CHECK);
3324 cfs->guarantee_more(4, CHECK); // class_index, method_index
3325 enclosing_method_class_index = cfs->get_u2_fast();
3326 enclosing_method_method_index = cfs->get_u2_fast();
3327 if (enclosing_method_class_index == 0) {
3328 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3329 }
3330 // Validate the constant pool indices and types
3331 check_property(valid_klass_reference_at(enclosing_method_class_index),
3332 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3333 if (enclosing_method_method_index != 0 &&
3334 (!cp->is_within_bounds(enclosing_method_method_index) ||
3335 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3336 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3337 }
3338 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3339 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3340 if (parsed_bootstrap_methods_attribute) {
3341 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3342 }
3343 parsed_bootstrap_methods_attribute = true;
3344 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3345 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3346 if (runtime_visible_type_annotations != NULL) {
3347 classfile_parse_error(
3348 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3349 }
3350 runtime_visible_type_annotations_length = attribute_length;
3351 runtime_visible_type_annotations = cfs->get_u1_buffer();
3352 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3353 // No need for the VM to parse Type annotations
3354 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3355 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3356 if (runtime_invisible_type_annotations_exists) {
3357 classfile_parse_error(
3358 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3359 } else {
3360 runtime_invisible_type_annotations_exists = true;
3361 }
3362 if (PreserveAllAnnotations) {
3363 runtime_invisible_type_annotations_length = attribute_length;
3364 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3365 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3366 }
3367 cfs->skip_u1(attribute_length, CHECK);
3368 } else {
3369 // Unknown attribute
3370 cfs->skip_u1(attribute_length, CHECK);
3371 }
3372 } else {
3373 // Unknown attribute
3374 cfs->skip_u1(attribute_length, CHECK);
3375 }
3376 }
3377 _annotations = assemble_annotations(runtime_visible_annotations,
3378 runtime_visible_annotations_length,
3379 runtime_invisible_annotations,
3380 runtime_invisible_annotations_length,
3381 CHECK);
3382 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3383 runtime_visible_type_annotations_length,
3384 runtime_invisible_type_annotations,
3385 runtime_invisible_type_annotations_length,
3386 CHECK);
3387
3388 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3389 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3390 cfs,
3391 inner_classes_attribute_start,
3392 parsed_innerclasses_attribute,
3393 enclosing_method_class_index,
3394 enclosing_method_method_index,
3395 CHECK);
3396 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3397 guarantee_property(
3398 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3399 "Wrong InnerClasses attribute length in class file %s", CHECK);
3400 }
3401 }
3402
3403 if (_max_bootstrap_specifier_index >= 0) {
3404 guarantee_property(parsed_bootstrap_methods_attribute,
3405 "Missing BootstrapMethods attribute in class file %s", CHECK);
3406 }
3407 }
3408
3409 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3410 assert(k != NULL, "invariant");
3411
3412 if (_synthetic_flag)
3413 k->set_is_synthetic();
3414 if (_sourcefile_index != 0) {
3415 k->set_source_file_name_index(_sourcefile_index);
3416 }
3417 if (_generic_signature_index != 0) {
3418 k->set_generic_signature_index(_generic_signature_index);
3419 }
3420 if (_sde_buffer != NULL) {
3421 k->set_source_debug_extension(_sde_buffer, _sde_length);
3422 }
3423 }
3424
3425 // Create the Annotations object that will
3426 // hold the annotations array for the Klass.
3427 void ClassFileParser::create_combined_annotations(TRAPS) {
3428 if (_annotations == NULL &&
3429 _type_annotations == NULL &&
3430 _fields_annotations == NULL &&
3431 _fields_type_annotations == NULL) {
3432 // Don't create the Annotations object unnecessarily.
3433 return;
3434 }
3435
3436 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3437 annotations->set_class_annotations(_annotations);
3438 annotations->set_class_type_annotations(_type_annotations);
3439 annotations->set_fields_annotations(_fields_annotations);
3440 annotations->set_fields_type_annotations(_fields_type_annotations);
3441
3442 // This is the Annotations object that will be
3443 // assigned to InstanceKlass being constructed.
3444 _combined_annotations = annotations;
3445
3446 // The annotations arrays below has been transfered the
3447 // _combined_annotations so these fields can now be cleared.
3448 _annotations = NULL;
3449 _type_annotations = NULL;
3450 _fields_annotations = NULL;
3451 _fields_type_annotations = NULL;
3452 }
3453
3454 // Transfer ownership of metadata allocated to the InstanceKlass.
3455 void ClassFileParser::apply_parsed_class_metadata(
3456 InstanceKlass* this_klass,
3457 int java_fields_count, TRAPS) {
3458 assert(this_klass != NULL, "invariant");
3459
3460 _cp->set_pool_holder(this_klass);
3461 this_klass->set_constants(_cp);
3462 this_klass->set_fields(_fields, java_fields_count);
3463 this_klass->set_methods(_methods);
3464 this_klass->set_inner_classes(_inner_classes);
3465 this_klass->set_local_interfaces(_local_interfaces);
3466 this_klass->set_transitive_interfaces(_transitive_interfaces);
3467 this_klass->set_annotations(_combined_annotations);
3468
3469 // Clear out these fields so they don't get deallocated by the destructor
3470 clear_class_metadata();
3471 }
3472
3473 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3474 int runtime_visible_annotations_length,
3475 const u1* const runtime_invisible_annotations,
3476 int runtime_invisible_annotations_length,
3477 TRAPS) {
3478 AnnotationArray* annotations = NULL;
3479 if (runtime_visible_annotations != NULL ||
3480 runtime_invisible_annotations != NULL) {
3481 annotations = MetadataFactory::new_array<u1>(_loader_data,
3482 runtime_visible_annotations_length +
3483 runtime_invisible_annotations_length,
3484 CHECK_(annotations));
3485 if (runtime_visible_annotations != NULL) {
3486 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3487 annotations->at_put(i, runtime_visible_annotations[i]);
3488 }
3489 }
3490 if (runtime_invisible_annotations != NULL) {
3491 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3492 int append = runtime_visible_annotations_length+i;
3493 annotations->at_put(append, runtime_invisible_annotations[i]);
3494 }
3495 }
3496 }
3497 return annotations;
3498 }
3499
3500 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3501 const int super_class_index,
3502 const bool need_verify,
3503 TRAPS) {
3504 assert(cp != NULL, "invariant");
3505 const InstanceKlass* super_klass = NULL;
3506
3507 if (super_class_index == 0) {
3508 check_property(_class_name == vmSymbols::java_lang_Object(),
3509 "Invalid superclass index %u in class file %s",
3510 super_class_index,
3511 CHECK_NULL);
3512 } else {
3513 check_property(valid_klass_reference_at(super_class_index),
3514 "Invalid superclass index %u in class file %s",
3515 super_class_index,
3516 CHECK_NULL);
3517 // The class name should be legal because it is checked when parsing constant pool.
3518 // However, make sure it is not an array type.
3519 bool is_array = false;
3520 if (cp->tag_at(super_class_index).is_klass()) {
3521 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3522 if (need_verify)
3523 is_array = super_klass->is_array_klass();
3524 } else if (need_verify) {
3525 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3526 }
3527 if (need_verify) {
3528 guarantee_property(!is_array,
3529 "Bad superclass name in class file %s", CHECK_NULL);
3530 }
3531 }
3532 return super_klass;
3533 }
3534
3535 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3536 unsigned int nonstatic_oop_map_count,
3537 int first_nonstatic_oop_offset) {
3538
3539 unsigned int map_count =
3540 NULL == super ? 0 : super->nonstatic_oop_map_count();
3541 if (nonstatic_oop_map_count > 0) {
3542 // We have oops to add to map
3543 if (map_count == 0) {
3544 map_count = nonstatic_oop_map_count;
3545 }
3546 else {
3547 // Check whether we should add a new map block or whether the last one can
3548 // be extended
3549 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3550 const OopMapBlock* const last_map = first_map + map_count - 1;
3551
3552 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3553 if (next_offset == first_nonstatic_oop_offset) {
3554 // There is no gap bettwen superklass's last oop field and first
3555 // local oop field, merge maps.
3556 nonstatic_oop_map_count -= 1;
3557 }
3558 else {
3559 // Superklass didn't end with a oop field, add extra maps
3560 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3561 }
3562 map_count += nonstatic_oop_map_count;
3563 }
3564 }
3565 return map_count;
3566 }
3567
3568 #ifndef PRODUCT
3569 static void print_field_layout(const Symbol* name,
3570 Array<u2>* fields,
3571 constantPoolHandle cp,
3572 int instance_size,
3573 int instance_fields_start,
3574 int instance_fields_end,
3575 int static_fields_end) {
3576
3577 assert(name != NULL, "invariant");
3578
3579 tty->print("%s: field layout\n", name->as_klass_external_name());
3580 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3581 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3582 if (!fs.access_flags().is_static()) {
3583 tty->print(" @%3d \"%s\" %s\n",
3584 fs.offset(),
3585 fs.name()->as_klass_external_name(),
3586 fs.signature()->as_klass_external_name());
3587 }
3588 }
3589 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3590 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3591 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3592 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3593 if (fs.access_flags().is_static()) {
3594 tty->print(" @%3d \"%s\" %s\n",
3595 fs.offset(),
3596 fs.name()->as_klass_external_name(),
3597 fs.signature()->as_klass_external_name());
3598 }
3599 }
3600 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3601 tty->print("\n");
3602 }
3603 #endif
3604
3605 // Values needed for oopmap and InstanceKlass creation
3606 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3607 public:
3608 int* nonstatic_oop_offsets;
3609 unsigned int* nonstatic_oop_counts;
3610 unsigned int nonstatic_oop_map_count;
3611 unsigned int total_oop_map_count;
3612 int instance_size;
3613 int nonstatic_field_size;
3614 int static_field_size;
3615 bool has_nonstatic_fields;
3616 };
3617
3618 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3619 void ClassFileParser::layout_fields(ConstantPool* cp,
3620 const FieldAllocationCount* fac,
3621 const ClassAnnotationCollector* parsed_annotations,
3622 FieldLayoutInfo* info,
3623 TRAPS) {
3624
3625 assert(cp != NULL, "invariant");
3626
3627 // Field size and offset computation
3628 int nonstatic_field_size = _super_klass == NULL ? 0 :
3629 _super_klass->nonstatic_field_size();
3630
3631 // Count the contended fields by type.
3632 //
3633 // We ignore static fields, because @Contended is not supported for them.
3634 // The layout code below will also ignore the static fields.
3635 int nonstatic_contended_count = 0;
3636 FieldAllocationCount fac_contended;
3637 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3638 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3639 if (fs.is_contended()) {
3640 fac_contended.count[atype]++;
3641 if (!fs.access_flags().is_static()) {
3642 nonstatic_contended_count++;
3643 }
3644 }
3645 }
3646
3647
3648 // Calculate the starting byte offsets
3649 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3650 int next_static_double_offset = next_static_oop_offset +
3651 ((fac->count[STATIC_OOP]) * heapOopSize);
3652 if ( fac->count[STATIC_DOUBLE] &&
3653 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3654 Universe::field_type_should_be_aligned(T_LONG)) ) {
3655 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3656 }
3657
3658 int next_static_word_offset = next_static_double_offset +
3659 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3660 int next_static_short_offset = next_static_word_offset +
3661 ((fac->count[STATIC_WORD]) * BytesPerInt);
3662 int next_static_byte_offset = next_static_short_offset +
3663 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3664
3665 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3666 nonstatic_field_size * heapOopSize;
3667
3668 int next_nonstatic_field_offset = nonstatic_fields_start;
3669
3670 const bool is_contended_class = parsed_annotations->is_contended();
3671
3672 // Class is contended, pad before all the fields
3673 if (is_contended_class) {
3674 next_nonstatic_field_offset += ContendedPaddingWidth;
3675 }
3676
3677 // Compute the non-contended fields count.
3678 // The packing code below relies on these counts to determine if some field
3679 // can be squeezed into the alignment gap. Contended fields are obviously
3680 // exempt from that.
3681 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3682 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3683 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3684 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3685 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3686
3687 // Total non-static fields count, including every contended field
3688 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3689 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3690 fac->count[NONSTATIC_OOP];
3691
3692 const bool super_has_nonstatic_fields =
3693 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3694 const bool has_nonstatic_fields =
3695 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3696
3697
3698 // Prepare list of oops for oop map generation.
3699 //
3700 // "offset" and "count" lists are describing the set of contiguous oop
3701 // regions. offset[i] is the start of the i-th region, which then has
3702 // count[i] oops following. Before we know how many regions are required,
3703 // we pessimistically allocate the maps to fit all the oops into the
3704 // distinct regions.
3705 //
3706 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3707 // to figure out if we still need to do this.
3708 unsigned int nonstatic_oop_map_count = 0;
3709 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3710
3711 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3712 THREAD, int, max_nonstatic_oop_maps);
3713 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3714 THREAD, unsigned int, max_nonstatic_oop_maps);
3715
3716 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3717
3718 bool compact_fields = CompactFields;
3719 int allocation_style = FieldsAllocationStyle;
3720 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3721 assert(false, "0 <= FieldsAllocationStyle <= 2");
3722 allocation_style = 1; // Optimistic
3723 }
3724
3725 // The next classes have predefined hard-coded fields offsets
3726 // (see in JavaClasses::compute_hard_coded_offsets()).
3727 // Use default fields allocation order for them.
3728 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3729 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3730 _class_name == vmSymbols::java_lang_Class() ||
3731 _class_name == vmSymbols::java_lang_ClassLoader() ||
3732 _class_name == vmSymbols::java_lang_ref_Reference() ||
3733 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3734 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3735 _class_name == vmSymbols::java_lang_String() ||
3736 _class_name == vmSymbols::java_lang_Throwable() ||
3737 _class_name == vmSymbols::java_lang_Boolean() ||
3738 _class_name == vmSymbols::java_lang_Character() ||
3739 _class_name == vmSymbols::java_lang_Float() ||
3740 _class_name == vmSymbols::java_lang_Double() ||
3741 _class_name == vmSymbols::java_lang_Byte() ||
3742 _class_name == vmSymbols::java_lang_Short() ||
3743 _class_name == vmSymbols::java_lang_Integer() ||
3744 _class_name == vmSymbols::java_lang_Long())) {
3745 allocation_style = 0; // Allocate oops first
3746 compact_fields = false; // Don't compact fields
3747 }
3748
3749 int next_nonstatic_oop_offset = 0;
3750 int next_nonstatic_double_offset = 0;
3751
3752 // Rearrange fields for a given allocation style
3753 if( allocation_style == 0 ) {
3754 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3755 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3756 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3757 (nonstatic_oop_count * heapOopSize);
3758 } else if( allocation_style == 1 ) {
3759 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3760 next_nonstatic_double_offset = next_nonstatic_field_offset;
3761 } else if( allocation_style == 2 ) {
3762 // Fields allocation: oops fields in super and sub classes are together.
3763 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3764 _super_klass->nonstatic_oop_map_size() > 0 ) {
3765 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3766 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3767 const OopMapBlock* const last_map = first_map + map_count - 1;
3768 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3769 if (next_offset == next_nonstatic_field_offset) {
3770 allocation_style = 0; // allocate oops first
3771 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3772 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3773 (nonstatic_oop_count * heapOopSize);
3774 }
3775 }
3776 if( allocation_style == 2 ) {
3777 allocation_style = 1; // allocate oops last
3778 next_nonstatic_double_offset = next_nonstatic_field_offset;
3779 }
3780 } else {
3781 ShouldNotReachHere();
3782 }
3783
3784 int nonstatic_oop_space_count = 0;
3785 int nonstatic_word_space_count = 0;
3786 int nonstatic_short_space_count = 0;
3787 int nonstatic_byte_space_count = 0;
3788 int nonstatic_oop_space_offset = 0;
3789 int nonstatic_word_space_offset = 0;
3790 int nonstatic_short_space_offset = 0;
3791 int nonstatic_byte_space_offset = 0;
3792
3793 // Try to squeeze some of the fields into the gaps due to
3794 // long/double alignment.
3795 if (nonstatic_double_count > 0) {
3796 int offset = next_nonstatic_double_offset;
3797 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3798 if (compact_fields && offset != next_nonstatic_double_offset) {
3799 // Allocate available fields into the gap before double field.
3800 int length = next_nonstatic_double_offset - offset;
3801 assert(length == BytesPerInt, "");
3802 nonstatic_word_space_offset = offset;
3803 if (nonstatic_word_count > 0) {
3804 nonstatic_word_count -= 1;
3805 nonstatic_word_space_count = 1; // Only one will fit
3806 length -= BytesPerInt;
3807 offset += BytesPerInt;
3808 }
3809 nonstatic_short_space_offset = offset;
3810 while (length >= BytesPerShort && nonstatic_short_count > 0) {
3811 nonstatic_short_count -= 1;
3812 nonstatic_short_space_count += 1;
3813 length -= BytesPerShort;
3814 offset += BytesPerShort;
3815 }
3816 nonstatic_byte_space_offset = offset;
3817 while (length > 0 && nonstatic_byte_count > 0) {
3818 nonstatic_byte_count -= 1;
3819 nonstatic_byte_space_count += 1;
3820 length -= 1;
3821 }
3822 // Allocate oop field in the gap if there are no other fields for that.
3823 nonstatic_oop_space_offset = offset;
3824 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3825 allocation_style != 0) { // when oop fields not first
3826 nonstatic_oop_count -= 1;
3827 nonstatic_oop_space_count = 1; // Only one will fit
3828 length -= heapOopSize;
3829 offset += heapOopSize;
3830 }
3831 }
3832 }
3833
3834 int next_nonstatic_word_offset = next_nonstatic_double_offset +
3835 (nonstatic_double_count * BytesPerLong);
3836 int next_nonstatic_short_offset = next_nonstatic_word_offset +
3837 (nonstatic_word_count * BytesPerInt);
3838 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3839 (nonstatic_short_count * BytesPerShort);
3840 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3841 nonstatic_byte_count;
3842
3843 // let oops jump before padding with this allocation style
3844 if( allocation_style == 1 ) {
3845 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3846 if( nonstatic_oop_count > 0 ) {
3847 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3848 }
3849 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3850 }
3851
3852 // Iterate over fields again and compute correct offsets.
3853 // The field allocation type was temporarily stored in the offset slot.
3854 // oop fields are located before non-oop fields (static and non-static).
3855 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3856
3857 // skip already laid out fields
3858 if (fs.is_offset_set()) continue;
3859
3860 // contended instance fields are handled below
3861 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3862
3863 int real_offset = 0;
3864 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3865
3866 // pack the rest of the fields
3867 switch (atype) {
3868 case STATIC_OOP:
3869 real_offset = next_static_oop_offset;
3870 next_static_oop_offset += heapOopSize;
3871 break;
3872 case STATIC_BYTE:
3873 real_offset = next_static_byte_offset;
3874 next_static_byte_offset += 1;
3875 break;
3876 case STATIC_SHORT:
3877 real_offset = next_static_short_offset;
3878 next_static_short_offset += BytesPerShort;
3879 break;
3880 case STATIC_WORD:
3881 real_offset = next_static_word_offset;
3882 next_static_word_offset += BytesPerInt;
3883 break;
3884 case STATIC_DOUBLE:
3885 real_offset = next_static_double_offset;
3886 next_static_double_offset += BytesPerLong;
3887 break;
3888 case NONSTATIC_OOP:
3889 if( nonstatic_oop_space_count > 0 ) {
3890 real_offset = nonstatic_oop_space_offset;
3891 nonstatic_oop_space_offset += heapOopSize;
3892 nonstatic_oop_space_count -= 1;
3893 } else {
3894 real_offset = next_nonstatic_oop_offset;
3895 next_nonstatic_oop_offset += heapOopSize;
3896 }
3897
3898 // Record this oop in the oop maps
3899 if( nonstatic_oop_map_count > 0 &&
3900 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3901 real_offset -
3902 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3903 heapOopSize ) {
3904 // This oop is adjacent to the previous one, add to current oop map
3905 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3906 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3907 } else {
3908 // This oop is not adjacent to the previous one, create new oop map
3909 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3910 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3911 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3912 nonstatic_oop_map_count += 1;
3913 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3914 first_nonstatic_oop_offset = real_offset;
3915 }
3916 }
3917 break;
3918 case NONSTATIC_BYTE:
3919 if( nonstatic_byte_space_count > 0 ) {
3920 real_offset = nonstatic_byte_space_offset;
3921 nonstatic_byte_space_offset += 1;
3922 nonstatic_byte_space_count -= 1;
3923 } else {
3924 real_offset = next_nonstatic_byte_offset;
3925 next_nonstatic_byte_offset += 1;
3926 }
3927 break;
3928 case NONSTATIC_SHORT:
3929 if( nonstatic_short_space_count > 0 ) {
3930 real_offset = nonstatic_short_space_offset;
3931 nonstatic_short_space_offset += BytesPerShort;
3932 nonstatic_short_space_count -= 1;
3933 } else {
3934 real_offset = next_nonstatic_short_offset;
3935 next_nonstatic_short_offset += BytesPerShort;
3936 }
3937 break;
3938 case NONSTATIC_WORD:
3939 if( nonstatic_word_space_count > 0 ) {
3940 real_offset = nonstatic_word_space_offset;
3941 nonstatic_word_space_offset += BytesPerInt;
3942 nonstatic_word_space_count -= 1;
3943 } else {
3944 real_offset = next_nonstatic_word_offset;
3945 next_nonstatic_word_offset += BytesPerInt;
3946 }
3947 break;
3948 case NONSTATIC_DOUBLE:
3949 real_offset = next_nonstatic_double_offset;
3950 next_nonstatic_double_offset += BytesPerLong;
3951 break;
3952 default:
3953 ShouldNotReachHere();
3954 }
3955 fs.set_offset(real_offset);
3956 }
3957
3958
3959 // Handle the contended cases.
3960 //
3961 // Each contended field should not intersect the cache line with another contended field.
3962 // In the absence of alignment information, we end up with pessimistically separating
3963 // the fields with full-width padding.
3964 //
3965 // Additionally, this should not break alignment for the fields, so we round the alignment up
3966 // for each field.
3967 if (nonstatic_contended_count > 0) {
3968
3969 // if there is at least one contended field, we need to have pre-padding for them
3970 next_nonstatic_padded_offset += ContendedPaddingWidth;
3971
3972 // collect all contended groups
3973 ResourceBitMap bm(cp->size());
3974 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3975 // skip already laid out fields
3976 if (fs.is_offset_set()) continue;
3977
3978 if (fs.is_contended()) {
3979 bm.set_bit(fs.contended_group());
3980 }
3981 }
3982
3983 int current_group = -1;
3984 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3985
3986 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3987
3988 // skip already laid out fields
3989 if (fs.is_offset_set()) continue;
3990
3991 // skip non-contended fields and fields from different group
3992 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3993
3994 // handle statics below
3995 if (fs.access_flags().is_static()) continue;
3996
3997 int real_offset = 0;
3998 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3999
4000 switch (atype) {
4001 case NONSTATIC_BYTE:
4002 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
4003 real_offset = next_nonstatic_padded_offset;
4004 next_nonstatic_padded_offset += 1;
4005 break;
4006
4007 case NONSTATIC_SHORT:
4008 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
4009 real_offset = next_nonstatic_padded_offset;
4010 next_nonstatic_padded_offset += BytesPerShort;
4011 break;
4012
4013 case NONSTATIC_WORD:
4014 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4015 real_offset = next_nonstatic_padded_offset;
4016 next_nonstatic_padded_offset += BytesPerInt;
4017 break;
4018
4019 case NONSTATIC_DOUBLE:
4020 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4021 real_offset = next_nonstatic_padded_offset;
4022 next_nonstatic_padded_offset += BytesPerLong;
4023 break;
4024
4025 case NONSTATIC_OOP:
4026 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4027 real_offset = next_nonstatic_padded_offset;
4028 next_nonstatic_padded_offset += heapOopSize;
4029
4030 // Record this oop in the oop maps
4031 if( nonstatic_oop_map_count > 0 &&
4032 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4033 real_offset -
4034 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4035 heapOopSize ) {
4036 // This oop is adjacent to the previous one, add to current oop map
4037 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4038 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4039 } else {
4040 // This oop is not adjacent to the previous one, create new oop map
4041 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4042 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4043 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4044 nonstatic_oop_map_count += 1;
4045 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4046 first_nonstatic_oop_offset = real_offset;
4047 }
4048 }
4049 break;
4050
4051 default:
4052 ShouldNotReachHere();
4053 }
4054
4055 if (fs.contended_group() == 0) {
4056 // Contended group defines the equivalence class over the fields:
4057 // the fields within the same contended group are not inter-padded.
4058 // The only exception is default group, which does not incur the
4059 // equivalence, and so requires intra-padding.
4060 next_nonstatic_padded_offset += ContendedPaddingWidth;
4061 }
4062
4063 fs.set_offset(real_offset);
4064 } // for
4065
4066 // Start laying out the next group.
4067 // Note that this will effectively pad the last group in the back;
4068 // this is expected to alleviate memory contention effects for
4069 // subclass fields and/or adjacent object.
4070 // If this was the default group, the padding is already in place.
4071 if (current_group != 0) {
4072 next_nonstatic_padded_offset += ContendedPaddingWidth;
4073 }
4074 }
4075
4076 // handle static fields
4077 }
4078
4079 // Entire class is contended, pad in the back.
4080 // This helps to alleviate memory contention effects for subclass fields
4081 // and/or adjacent object.
4082 if (is_contended_class) {
4083 next_nonstatic_padded_offset += ContendedPaddingWidth;
4084 }
4085
4086 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4087
4088 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
4089 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4090 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
4091
4092 int static_field_size = (static_fields_end -
4093 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4094 nonstatic_field_size = nonstatic_field_size +
4095 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4096
4097 int instance_size = align_object_size(instance_end / wordSize);
4098
4099 assert(instance_size == align_object_size(align_size_up(
4100 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4101 wordSize) / wordSize), "consistent layout helper value");
4102
4103 // Invariant: nonstatic_field end/start should only change if there are
4104 // nonstatic fields in the class, or if the class is contended. We compare
4105 // against the non-aligned value, so that end alignment will not fail the
4106 // assert without actually having the fields.
4107 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4108 is_contended_class ||
4109 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4110
4111 // Number of non-static oop map blocks allocated at end of klass.
4112 const unsigned int total_oop_map_count =
4113 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4114 first_nonstatic_oop_offset);
4115
4116 #ifndef PRODUCT
4117 if (PrintFieldLayout) {
4118 print_field_layout(_class_name,
4119 _fields,
4120 cp,
4121 instance_size,
4122 nonstatic_fields_start,
4123 nonstatic_fields_end,
4124 static_fields_end);
4125 }
4126
4127 #endif
4128 // Pass back information needed for InstanceKlass creation
4129 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4130 info->nonstatic_oop_counts = nonstatic_oop_counts;
4131 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4132 info->total_oop_map_count = total_oop_map_count;
4133 info->instance_size = instance_size;
4134 info->static_field_size = static_field_size;
4135 info->nonstatic_field_size = nonstatic_field_size;
4136 info->has_nonstatic_fields = has_nonstatic_fields;
4137 }
4138
4139 static void fill_oop_maps(const InstanceKlass* k,
4140 unsigned int nonstatic_oop_map_count,
4141 const int* nonstatic_oop_offsets,
4142 const unsigned int* nonstatic_oop_counts) {
4143
4144 assert(k != NULL, "invariant");
4145
4146 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4147 const InstanceKlass* const super = k->superklass();
4148 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4149 if (super_count > 0) {
4150 // Copy maps from superklass
4151 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4152 for (unsigned int i = 0; i < super_count; ++i) {
4153 *this_oop_map++ = *super_oop_map++;
4154 }
4155 }
4156
4157 if (nonstatic_oop_map_count > 0) {
4158 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4159 // The counts differ because there is no gap between superklass's last oop
4160 // field and the first local oop field. Extend the last oop map copied
4161 // from the superklass instead of creating new one.
4162 nonstatic_oop_map_count--;
4163 nonstatic_oop_offsets++;
4164 this_oop_map--;
4165 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4166 this_oop_map++;
4167 }
4168
4169 // Add new map blocks, fill them
4170 while (nonstatic_oop_map_count-- > 0) {
4171 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4172 this_oop_map->set_count(*nonstatic_oop_counts++);
4173 this_oop_map++;
4174 }
4175 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4176 this_oop_map, "sanity");
4177 }
4178 }
4179
4180
4181 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4182 assert(ik != NULL, "invariant");
4183
4184 const Klass* const super = ik->super();
4185
4186 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4187 // in which case we don't have to register objects as finalizable
4188 if (!_has_empty_finalizer) {
4189 if (_has_finalizer ||
4190 (super != NULL && super->has_finalizer())) {
4191 ik->set_has_finalizer();
4192 }
4193 }
4194
4195 #ifdef ASSERT
4196 bool f = false;
4197 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4198 vmSymbols::void_method_signature());
4199 if (m != NULL && !m->is_empty_method()) {
4200 f = true;
4201 }
4202
4203 // Spec doesn't prevent agent from redefinition of empty finalizer.
4204 // Despite the fact that it's generally bad idea and redefined finalizer
4205 // will not work as expected we shouldn't abort vm in this case
4206 if (!ik->has_redefined_this_or_super()) {
4207 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4208 }
4209 #endif
4210
4211 // Check if this klass supports the java.lang.Cloneable interface
4212 if (SystemDictionary::Cloneable_klass_loaded()) {
4213 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4214 ik->set_is_cloneable();
4215 }
4216 }
4217
4218 // Check if this klass has a vanilla default constructor
4219 if (super == NULL) {
4220 // java.lang.Object has empty default constructor
4221 ik->set_has_vanilla_constructor();
4222 } else {
4223 if (super->has_vanilla_constructor() &&
4224 _has_vanilla_constructor) {
4225 ik->set_has_vanilla_constructor();
4226 }
4227 #ifdef ASSERT
4228 bool v = false;
4229 if (super->has_vanilla_constructor()) {
4230 const Method* const constructor =
4231 ik->find_method(vmSymbols::object_initializer_name(),
4232 vmSymbols::void_method_signature());
4233 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4234 v = true;
4235 }
4236 }
4237 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4238 #endif
4239 }
4240
4241 // If it cannot be fast-path allocated, set a bit in the layout helper.
4242 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4243 assert(ik->size_helper() > 0, "layout_helper is initialized");
4244 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4245 || ik->is_abstract() || ik->is_interface()
4246 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4247 || ik->size_helper() >= FastAllocateSizeLimit) {
4248 // Forbid fast-path allocation.
4249 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4250 ik->set_layout_helper(lh);
4251 }
4252 }
4253
4254 // Attach super classes and interface classes to class loader data
4255 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4256 TRAPS) {
4257 assert(defined_klass != NULL, "invariant");
4258
4259 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4260 if (defining_loader_data->is_the_null_class_loader_data()) {
4261 // Dependencies to null class loader data are implicit.
4262 return;
4263 } else {
4264 // add super class dependency
4265 Klass* const super = defined_klass->super();
4266 if (super != NULL) {
4267 defining_loader_data->record_dependency(super, CHECK);
4268 }
4269
4270 // add super interface dependencies
4271 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4272 if (local_interfaces != NULL) {
4273 const int length = local_interfaces->length();
4274 for (int i = 0; i < length; i++) {
4275 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4276 }
4277 }
4278 }
4279 }
4280
4281 // utility methods for appending an array with check for duplicates
4282
4283 static void append_interfaces(GrowableArray<Klass*>* result,
4284 const Array<Klass*>* const ifs) {
4285 // iterate over new interfaces
4286 for (int i = 0; i < ifs->length(); i++) {
4287 Klass* const e = ifs->at(i);
4288 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4289 // add new interface
4290 result->append_if_missing(e);
4291 }
4292 }
4293
4294 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4295 Array<Klass*>* local_ifs,
4296 ClassLoaderData* loader_data,
4297 TRAPS) {
4298 assert(local_ifs != NULL, "invariant");
4299 assert(loader_data != NULL, "invariant");
4300
4301 // Compute maximum size for transitive interfaces
4302 int max_transitive_size = 0;
4303 int super_size = 0;
4304 // Add superclass transitive interfaces size
4305 if (super != NULL) {
4306 super_size = super->transitive_interfaces()->length();
4307 max_transitive_size += super_size;
4308 }
4309 // Add local interfaces' super interfaces
4310 const int local_size = local_ifs->length();
4311 for (int i = 0; i < local_size; i++) {
4312 Klass* const l = local_ifs->at(i);
4313 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4314 }
4315 // Finally add local interfaces
4316 max_transitive_size += local_size;
4317 // Construct array
4318 if (max_transitive_size == 0) {
4319 // no interfaces, use canonicalized array
4320 return Universe::the_empty_klass_array();
4321 } else if (max_transitive_size == super_size) {
4322 // no new local interfaces added, share superklass' transitive interface array
4323 return super->transitive_interfaces();
4324 } else if (max_transitive_size == local_size) {
4325 // only local interfaces added, share local interface array
4326 return local_ifs;
4327 } else {
4328 ResourceMark rm;
4329 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4330
4331 // Copy down from superclass
4332 if (super != NULL) {
4333 append_interfaces(result, super->transitive_interfaces());
4334 }
4335
4336 // Copy down from local interfaces' superinterfaces
4337 for (int i = 0; i < local_size; i++) {
4338 Klass* const l = local_ifs->at(i);
4339 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4340 }
4341 // Finally add local interfaces
4342 append_interfaces(result, local_ifs);
4343
4344 // length will be less than the max_transitive_size if duplicates were removed
4345 const int length = result->length();
4346 assert(length <= max_transitive_size, "just checking");
4347 Array<Klass*>* const new_result =
4348 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4349 for (int i = 0; i < length; i++) {
4350 Klass* const e = result->at(i);
4351 assert(e != NULL, "just checking");
4352 new_result->at_put(i, e);
4353 }
4354 return new_result;
4355 }
4356 }
4357
4358 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4359 assert(this_klass != NULL, "invariant");
4360 const Klass* const super = this_klass->super();
4361 if (super != NULL) {
4362
4363 // If the loader is not the boot loader then throw an exception if its
4364 // superclass is in package jdk.internal.reflect and its loader is not a
4365 // special reflection class loader
4366 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4367 assert(super->is_instance_klass(), "super is not instance klass");
4368 PackageEntry* super_package = super->package();
4369 if (super_package != NULL &&
4370 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4371 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4372 ResourceMark rm(THREAD);
4373 Exceptions::fthrow(
4374 THREAD_AND_LOCATION,
4375 vmSymbols::java_lang_IllegalAccessError(),
4376 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4377 this_klass->external_name(),
4378 this_klass->class_loader_data()->loader_name(),
4379 super->external_name());
4380 return;
4381 }
4382 }
4383
4384 Reflection::VerifyClassAccessResults vca_result =
4385 Reflection::verify_class_access(this_klass, super, false);
4386 if (vca_result != Reflection::ACCESS_OK) {
4387 ResourceMark rm(THREAD);
4388 char* msg = Reflection::verify_class_access_msg(this_klass, super, vca_result);
4389 if (msg == NULL) {
4390 Exceptions::fthrow(
4391 THREAD_AND_LOCATION,
4392 vmSymbols::java_lang_IllegalAccessError(),
4393 "class %s cannot access its superclass %s",
4394 this_klass->external_name(),
4395 super->external_name());
4396 } else {
4397 // Add additional message content.
4398 Exceptions::fthrow(
4399 THREAD_AND_LOCATION,
4400 vmSymbols::java_lang_IllegalAccessError(),
4401 "superclass access check failed: %s",
4402 msg);
4403 }
4404 }
4405 }
4406 }
4407
4408
4409 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4410 assert(this_klass != NULL, "invariant");
4411 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4412 const int lng = local_interfaces->length();
4413 for (int i = lng - 1; i >= 0; i--) {
4414 Klass* const k = local_interfaces->at(i);
4415 assert (k != NULL && k->is_interface(), "invalid interface");
4416 Reflection::VerifyClassAccessResults vca_result =
4417 Reflection::verify_class_access(this_klass, k, false);
4418 if (vca_result != Reflection::ACCESS_OK) {
4419 ResourceMark rm(THREAD);
4420 char* msg = Reflection::verify_class_access_msg(this_klass, k, vca_result);
4421 if (msg == NULL) {
4422 Exceptions::fthrow(
4423 THREAD_AND_LOCATION,
4424 vmSymbols::java_lang_IllegalAccessError(),
4425 "class %s cannot access its superinterface %s",
4426 this_klass->external_name(),
4427 k->external_name());
4428 } else {
4429 // Add additional message content.
4430 Exceptions::fthrow(
4431 THREAD_AND_LOCATION,
4432 vmSymbols::java_lang_IllegalAccessError(),
4433 "superinterface check failed: %s",
4434 msg);
4435 }
4436 }
4437 }
4438 }
4439
4440
4441 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4442 assert(this_klass != NULL, "invariant");
4443 const Array<Method*>* const methods = this_klass->methods();
4444 const int num_methods = methods->length();
4445
4446 // go thru each method and check if it overrides a final method
4447 for (int index = 0; index < num_methods; index++) {
4448 const Method* const m = methods->at(index);
4449
4450 // skip private, static, and <init> methods
4451 if ((!m->is_private() && !m->is_static()) &&
4452 (m->name() != vmSymbols::object_initializer_name())) {
4453
4454 const Symbol* const name = m->name();
4455 const Symbol* const signature = m->signature();
4456 const Klass* k = this_klass->super();
4457 const Method* super_m = NULL;
4458 while (k != NULL) {
4459 // skip supers that don't have final methods.
4460 if (k->has_final_method()) {
4461 // lookup a matching method in the super class hierarchy
4462 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4463 if (super_m == NULL) {
4464 break; // didn't find any match; get out
4465 }
4466
4467 if (super_m->is_final() && !super_m->is_static() &&
4468 // matching method in super is final, and not static
4469 (Reflection::verify_field_access(this_klass,
4470 super_m->method_holder(),
4471 super_m->method_holder(),
4472 super_m->access_flags(), false))
4473 // this class can access super final method and therefore override
4474 ) {
4475 ResourceMark rm(THREAD);
4476 Exceptions::fthrow(
4477 THREAD_AND_LOCATION,
4478 vmSymbols::java_lang_VerifyError(),
4479 "class %s overrides final method %s.%s%s",
4480 this_klass->external_name(),
4481 super_m->method_holder()->external_name(),
4482 name->as_C_string(),
4483 signature->as_C_string()
4484 );
4485 return;
4486 }
4487
4488 // continue to look from super_m's holder's super.
4489 k = super_m->method_holder()->super();
4490 continue;
4491 }
4492
4493 k = k->super();
4494 }
4495 }
4496 }
4497 }
4498
4499
4500 // assumes that this_klass is an interface
4501 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4502 assert(this_klass != NULL, "invariant");
4503 assert(this_klass->is_interface(), "not an interface");
4504 const Array<Method*>* methods = this_klass->methods();
4505 const int num_methods = methods->length();
4506
4507 for (int index = 0; index < num_methods; index++) {
4508 const Method* const m = methods->at(index);
4509 // if m is static and not the init method, throw a verify error
4510 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4511 ResourceMark rm(THREAD);
4512 Exceptions::fthrow(
4513 THREAD_AND_LOCATION,
4514 vmSymbols::java_lang_VerifyError(),
4515 "Illegal static method %s in interface %s",
4516 m->name()->as_C_string(),
4517 this_klass->external_name()
4518 );
4519 return;
4520 }
4521 }
4522 }
4523
4524 // utility methods for format checking
4525
4526 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4527 if (!_need_verify) { return; }
4528
4529 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4530 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4531 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4532 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4533 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4534 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4535 const bool is_module_info= (flags & JVM_ACC_MODULE) != 0;
4536 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4537
4538 if ((is_abstract && is_final) ||
4539 (is_interface && !is_abstract) ||
4540 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4541 (!is_interface && major_gte_15 && is_annotation) ||
4542 is_module_info) {
4543 ResourceMark rm(THREAD);
4544 Exceptions::fthrow(
4545 THREAD_AND_LOCATION,
4546 vmSymbols::java_lang_ClassFormatError(),
4547 "Illegal class modifiers in class %s: 0x%X",
4548 _class_name->as_C_string(), flags
4549 );
4550 return;
4551 }
4552 }
4553
4554 static bool has_illegal_visibility(jint flags) {
4555 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4556 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4557 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4558
4559 return ((is_public && is_protected) ||
4560 (is_public && is_private) ||
4561 (is_protected && is_private));
4562 }
4563
4564 static bool is_supported_version(u2 major, u2 minor){
4565 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4566 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4567 (major <= max_version) &&
4568 ((major != max_version) ||
4569 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4570 }
4571
4572 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4573 bool is_interface,
4574 TRAPS) const {
4575 if (!_need_verify) { return; }
4576
4577 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4578 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4579 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4580 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4581 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4582 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4583 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4584 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4585 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4586
4587 bool is_illegal = false;
4588
4589 if (is_interface) {
4590 if (!is_public || !is_static || !is_final || is_private ||
4591 is_protected || is_volatile || is_transient ||
4592 (major_gte_15 && is_enum)) {
4593 is_illegal = true;
4594 }
4595 } else { // not interface
4596 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4597 is_illegal = true;
4598 }
4599 }
4600
4601 if (is_illegal) {
4602 ResourceMark rm(THREAD);
4603 Exceptions::fthrow(
4604 THREAD_AND_LOCATION,
4605 vmSymbols::java_lang_ClassFormatError(),
4606 "Illegal field modifiers in class %s: 0x%X",
4607 _class_name->as_C_string(), flags);
4608 return;
4609 }
4610 }
4611
4612 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4613 bool is_interface,
4614 const Symbol* name,
4615 TRAPS) const {
4616 if (!_need_verify) { return; }
4617
4618 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4619 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4620 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4621 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4622 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4623 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4624 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4625 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4626 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4627 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4628 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4629 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4630 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4631
4632 bool is_illegal = false;
4633
4634 if (is_interface) {
4635 if (major_gte_8) {
4636 // Class file version is JAVA_8_VERSION or later Methods of
4637 // interfaces may set any of the flags except ACC_PROTECTED,
4638 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4639 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4640 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4641 (is_native || is_protected || is_final || is_synchronized) ||
4642 // If a specific method of a class or interface has its
4643 // ACC_ABSTRACT flag set, it must not have any of its
4644 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4645 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4646 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4647 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4648 (is_abstract && (is_private || is_static || is_strict))) {
4649 is_illegal = true;
4650 }
4651 } else if (major_gte_15) {
4652 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4653 if (!is_public || is_private || is_protected || is_static || is_final ||
4654 is_synchronized || is_native || !is_abstract || is_strict) {
4655 is_illegal = true;
4656 }
4657 } else {
4658 // Class file version is pre-JAVA_1_5_VERSION
4659 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4660 is_illegal = true;
4661 }
4662 }
4663 } else { // not interface
4664 if (has_illegal_visibility(flags)) {
4665 is_illegal = true;
4666 } else {
4667 if (is_initializer) {
4668 if (is_static || is_final || is_synchronized || is_native ||
4669 is_abstract || (major_gte_15 && is_bridge)) {
4670 is_illegal = true;
4671 }
4672 } else { // not initializer
4673 if (is_abstract) {
4674 if ((is_final || is_native || is_private || is_static ||
4675 (major_gte_15 && (is_synchronized || is_strict)))) {
4676 is_illegal = true;
4677 }
4678 }
4679 }
4680 }
4681 }
4682
4683 if (is_illegal) {
4684 ResourceMark rm(THREAD);
4685 Exceptions::fthrow(
4686 THREAD_AND_LOCATION,
4687 vmSymbols::java_lang_ClassFormatError(),
4688 "Method %s in class %s has illegal modifiers: 0x%X",
4689 name->as_C_string(), _class_name->as_C_string(), flags);
4690 return;
4691 }
4692 }
4693
4694 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4695 int length,
4696 TRAPS) const {
4697 assert(_need_verify, "only called when _need_verify is true");
4698 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4699 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4700 }
4701 }
4702
4703 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4704 // In class names, '/' separates unqualified names. This is verified in this function also.
4705 // Method names also may not contain the characters '<' or '>', unless <init>
4706 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4707 // method. Because these names have been checked as special cases before
4708 // calling this method in verify_legal_method_name.
4709 //
4710 // This method is also called from the modular system APIs in modules.cpp
4711 // to verify the validity of module and package names.
4712 bool ClassFileParser::verify_unqualified_name(const char* name,
4713 unsigned int length,
4714 int type) {
4715 for (const char* p = name; p != name + length;) {
4716 jchar ch = *p;
4717 if (ch < 128) {
4718 if (ch == '.' || ch == ';' || ch == '[' ) {
4719 return false; // do not permit '.', ';', or '['
4720 }
4721 if (ch == '/') {
4722 // check for '//' or leading or trailing '/' which are not legal
4723 // unqualified name must not be empty
4724 if (type == ClassFileParser::LegalClass) {
4725 if (p == name || p+1 >= name+length || *(p+1) == '/') {
4726 return false;
4727 }
4728 } else {
4729 return false; // do not permit '/' unless it's class name
4730 }
4731 }
4732 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
4733 return false; // do not permit '<' or '>' in method names
4734 }
4735 p++;
4736 } else {
4737 char* tmp_p = UTF8::next(p, &ch);
4738 p = tmp_p;
4739 }
4740 }
4741 return true;
4742 }
4743
4744 // Take pointer to a string. Skip over the longest part of the string that could
4745 // be taken as a fieldname. Allow '/' if slash_ok is true.
4746 // Return a pointer to just past the fieldname.
4747 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4748 // being true, we saw consecutive slashes (meaning we were looking for a
4749 // qualified path but found something that was badly-formed).
4750 static const char* skip_over_field_name(const char* name,
4751 bool slash_ok,
4752 unsigned int length) {
4753 const char* p;
4754 jboolean last_is_slash = false;
4755 jboolean not_first_ch = false;
4756
4757 for (p = name; p != name + length; not_first_ch = true) {
4758 const char* old_p = p;
4759 jchar ch = *p;
4760 if (ch < 128) {
4761 p++;
4762 // quick check for ascii
4763 if ((ch >= 'a' && ch <= 'z') ||
4764 (ch >= 'A' && ch <= 'Z') ||
4765 (ch == '_' || ch == '$') ||
4766 (not_first_ch && ch >= '0' && ch <= '9')) {
4767 last_is_slash = false;
4768 continue;
4769 }
4770 if (slash_ok && ch == '/') {
4771 if (last_is_slash) {
4772 return NULL; // Don't permit consecutive slashes
4773 }
4774 last_is_slash = true;
4775 continue;
4776 }
4777 }
4778 else {
4779 jint unicode_ch;
4780 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4781 p = tmp_p;
4782 last_is_slash = false;
4783 // Check if ch is Java identifier start or is Java identifier part
4784 // 4672820: call java.lang.Character methods directly without generating separate tables.
4785 EXCEPTION_MARK;
4786
4787 // return value
4788 JavaValue result(T_BOOLEAN);
4789 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4790 JavaCallArguments args;
4791 args.push_int(unicode_ch);
4792
4793 // public static boolean isJavaIdentifierStart(char ch);
4794 JavaCalls::call_static(&result,
4795 SystemDictionary::Character_klass(),
4796 vmSymbols::isJavaIdentifierStart_name(),
4797 vmSymbols::int_bool_signature(),
4798 &args,
4799 THREAD);
4800
4801 if (HAS_PENDING_EXCEPTION) {
4802 CLEAR_PENDING_EXCEPTION;
4803 return 0;
4804 }
4805 if (result.get_jboolean()) {
4806 continue;
4807 }
4808
4809 if (not_first_ch) {
4810 // public static boolean isJavaIdentifierPart(char ch);
4811 JavaCalls::call_static(&result,
4812 SystemDictionary::Character_klass(),
4813 vmSymbols::isJavaIdentifierPart_name(),
4814 vmSymbols::int_bool_signature(),
4815 &args,
4816 THREAD);
4817
4818 if (HAS_PENDING_EXCEPTION) {
4819 CLEAR_PENDING_EXCEPTION;
4820 return 0;
4821 }
4822
4823 if (result.get_jboolean()) {
4824 continue;
4825 }
4826 }
4827 }
4828 return (not_first_ch) ? old_p : NULL;
4829 }
4830 return (not_first_ch) ? p : NULL;
4831 }
4832
4833 // Take pointer to a string. Skip over the longest part of the string that could
4834 // be taken as a field signature. Allow "void" if void_ok.
4835 // Return a pointer to just past the signature.
4836 // Return NULL if no legal signature is found.
4837 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4838 bool void_ok,
4839 unsigned int length,
4840 TRAPS) const {
4841 unsigned int array_dim = 0;
4842 while (length > 0) {
4843 switch (signature[0]) {
4844 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4845 case JVM_SIGNATURE_BOOLEAN:
4846 case JVM_SIGNATURE_BYTE:
4847 case JVM_SIGNATURE_CHAR:
4848 case JVM_SIGNATURE_SHORT:
4849 case JVM_SIGNATURE_INT:
4850 case JVM_SIGNATURE_FLOAT:
4851 case JVM_SIGNATURE_LONG:
4852 case JVM_SIGNATURE_DOUBLE:
4853 return signature + 1;
4854 case JVM_SIGNATURE_CLASS: {
4855 if (_major_version < JAVA_1_5_VERSION) {
4856 // Skip over the class name if one is there
4857 const char* const p = skip_over_field_name(signature + 1, true, --length);
4858
4859 // The next character better be a semicolon
4860 if (p && (p - signature) > 1 && p[0] == ';') {
4861 return p + 1;
4862 }
4863 }
4864 else {
4865 // Skip leading 'L' and ignore first appearance of ';'
4866 length--;
4867 signature++;
4868 char* c = strchr((char*) signature, ';');
4869 // Format check signature
4870 if (c != NULL) {
4871 ResourceMark rm(THREAD);
4872 int newlen = c - (char*) signature;
4873 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
4874 strncpy(sig, signature, newlen);
4875 sig[newlen] = '\0';
4876
4877 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
4878 if (!legal) {
4879 classfile_parse_error("Class name contains illegal character "
4880 "in descriptor in class file %s",
4881 CHECK_0);
4882 return NULL;
4883 }
4884 return signature + newlen + 1;
4885 }
4886 }
4887 return NULL;
4888 }
4889 case JVM_SIGNATURE_ARRAY:
4890 array_dim++;
4891 if (array_dim > 255) {
4892 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4893 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4894 }
4895 // The rest of what's there better be a legal signature
4896 signature++;
4897 length--;
4898 void_ok = false;
4899 break;
4900 default:
4901 return NULL;
4902 }
4903 }
4904 return NULL;
4905 }
4906
4907 // Checks if name is a legal class name.
4908 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4909 if (!_need_verify || _relax_verify) { return; }
4910
4911 char buf[fixed_buffer_size];
4912 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4913 unsigned int length = name->utf8_length();
4914 bool legal = false;
4915
4916 if (length > 0) {
4917 const char* p;
4918 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4919 p = skip_over_field_signature(bytes, false, length, CHECK);
4920 legal = (p != NULL) && ((p - bytes) == (int)length);
4921 } else if (_major_version < JAVA_1_5_VERSION) {
4922 if (bytes[0] != '<') {
4923 p = skip_over_field_name(bytes, true, length);
4924 legal = (p != NULL) && ((p - bytes) == (int)length);
4925 }
4926 } else {
4927 // 4900761: relax the constraints based on JSR202 spec
4928 // Class names may be drawn from the entire Unicode character set.
4929 // Identifiers between '/' must be unqualified names.
4930 // The utf8 string has been verified when parsing cpool entries.
4931 legal = verify_unqualified_name(bytes, length, LegalClass);
4932 }
4933 }
4934 if (!legal) {
4935 ResourceMark rm(THREAD);
4936 assert(_class_name != NULL, "invariant");
4937 Exceptions::fthrow(
4938 THREAD_AND_LOCATION,
4939 vmSymbols::java_lang_ClassFormatError(),
4940 "Illegal class name \"%s\" in class file %s", bytes,
4941 _class_name->as_C_string()
4942 );
4943 return;
4944 }
4945 }
4946
4947 // Checks if name is a legal field name.
4948 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4949 if (!_need_verify || _relax_verify) { return; }
4950
4951 char buf[fixed_buffer_size];
4952 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4953 unsigned int length = name->utf8_length();
4954 bool legal = false;
4955
4956 if (length > 0) {
4957 if (_major_version < JAVA_1_5_VERSION) {
4958 if (bytes[0] != '<') {
4959 const char* p = skip_over_field_name(bytes, false, length);
4960 legal = (p != NULL) && ((p - bytes) == (int)length);
4961 }
4962 } else {
4963 // 4881221: relax the constraints based on JSR202 spec
4964 legal = verify_unqualified_name(bytes, length, LegalField);
4965 }
4966 }
4967
4968 if (!legal) {
4969 ResourceMark rm(THREAD);
4970 assert(_class_name != NULL, "invariant");
4971 Exceptions::fthrow(
4972 THREAD_AND_LOCATION,
4973 vmSymbols::java_lang_ClassFormatError(),
4974 "Illegal field name \"%s\" in class %s", bytes,
4975 _class_name->as_C_string()
4976 );
4977 return;
4978 }
4979 }
4980
4981 // Checks if name is a legal method name.
4982 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4983 if (!_need_verify || _relax_verify) { return; }
4984
4985 assert(name != NULL, "method name is null");
4986 char buf[fixed_buffer_size];
4987 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4988 unsigned int length = name->utf8_length();
4989 bool legal = false;
4990
4991 if (length > 0) {
4992 if (bytes[0] == '<') {
4993 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4994 legal = true;
4995 }
4996 } else if (_major_version < JAVA_1_5_VERSION) {
4997 const char* p;
4998 p = skip_over_field_name(bytes, false, length);
4999 legal = (p != NULL) && ((p - bytes) == (int)length);
5000 } else {
5001 // 4881221: relax the constraints based on JSR202 spec
5002 legal = verify_unqualified_name(bytes, length, LegalMethod);
5003 }
5004 }
5005
5006 if (!legal) {
5007 ResourceMark rm(THREAD);
5008 assert(_class_name != NULL, "invariant");
5009 Exceptions::fthrow(
5010 THREAD_AND_LOCATION,
5011 vmSymbols::java_lang_ClassFormatError(),
5012 "Illegal method name \"%s\" in class %s", bytes,
5013 _class_name->as_C_string()
5014 );
5015 return;
5016 }
5017 }
5018
5019
5020 // Checks if signature is a legal field signature.
5021 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5022 const Symbol* signature,
5023 TRAPS) const {
5024 if (!_need_verify) { return; }
5025
5026 char buf[fixed_buffer_size];
5027 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5028 const unsigned int length = signature->utf8_length();
5029 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5030
5031 if (p == NULL || (p - bytes) != (int)length) {
5032 throwIllegalSignature("Field", name, signature, CHECK);
5033 }
5034 }
5035
5036 // Checks if signature is a legal method signature.
5037 // Returns number of parameters
5038 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5039 const Symbol* signature,
5040 TRAPS) const {
5041 if (!_need_verify) {
5042 // make sure caller's args_size will be less than 0 even for non-static
5043 // method so it will be recomputed in compute_size_of_parameters().
5044 return -2;
5045 }
5046
5047 // Class initializers cannot have args for class format version >= 51.
5048 if (name == vmSymbols::class_initializer_name() &&
5049 signature != vmSymbols::void_method_signature() &&
5050 _major_version >= JAVA_7_VERSION) {
5051 throwIllegalSignature("Method", name, signature, CHECK_0);
5052 return 0;
5053 }
5054
5055 unsigned int args_size = 0;
5056 char buf[fixed_buffer_size];
5057 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5058 unsigned int length = signature->utf8_length();
5059 const char* nextp;
5060
5061 // The first character must be a '('
5062 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5063 length--;
5064 // Skip over legal field signatures
5065 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5066 while ((length > 0) && (nextp != NULL)) {
5067 args_size++;
5068 if (p[0] == 'J' || p[0] == 'D') {
5069 args_size++;
5070 }
5071 length -= nextp - p;
5072 p = nextp;
5073 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5074 }
5075 // The first non-signature thing better be a ')'
5076 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5077 length--;
5078 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5079 // All internal methods must return void
5080 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5081 return args_size;
5082 }
5083 } else {
5084 // Now we better just have a return value
5085 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5086 if (nextp && ((int)length == (nextp - p))) {
5087 return args_size;
5088 }
5089 }
5090 }
5091 }
5092 // Report error
5093 throwIllegalSignature("Method", name, signature, CHECK_0);
5094 return 0;
5095 }
5096
5097 int ClassFileParser::static_field_size() const {
5098 assert(_field_info != NULL, "invariant");
5099 return _field_info->static_field_size;
5100 }
5101
5102 int ClassFileParser::total_oop_map_count() const {
5103 assert(_field_info != NULL, "invariant");
5104 return _field_info->total_oop_map_count;
5105 }
5106
5107 jint ClassFileParser::layout_size() const {
5108 assert(_field_info != NULL, "invariant");
5109 return _field_info->instance_size;
5110 }
5111
5112 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5113 const Array<Method*>* methods) {
5114 assert(ik != NULL, "invariant");
5115 assert(methods != NULL, "invariant");
5116
5117 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5118 // (We used to do this lazily, but now we query it in Rewriter,
5119 // which is eagerly done for every method, so we might as well do it now,
5120 // when everything is fresh in memory.)
5121 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5122
5123 if (klass_id != vmSymbols::NO_SID) {
5124 for (int j = 0; j < methods->length(); ++j) {
5125 Method* method = methods->at(j);
5126 method->init_intrinsic_id();
5127
5128 if (CheckIntrinsics) {
5129 // Check if an intrinsic is defined for method 'method',
5130 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5131 if (method->intrinsic_id() != vmIntrinsics::_none &&
5132 !method->intrinsic_candidate()) {
5133 tty->print("Compiler intrinsic is defined for method [%s], "
5134 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5135 method->name_and_sig_as_C_string(),
5136 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5137 );
5138 tty->cr();
5139 DEBUG_ONLY(vm_exit(1));
5140 }
5141 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5142 // but there is no intrinsic available for it.
5143 if (method->intrinsic_candidate() &&
5144 method->intrinsic_id() == vmIntrinsics::_none) {
5145 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5146 "but no compiler intrinsic is defined for the method.%s",
5147 method->name_and_sig_as_C_string(),
5148 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5149 );
5150 tty->cr();
5151 DEBUG_ONLY(vm_exit(1));
5152 }
5153 }
5154 } // end for
5155
5156 #ifdef ASSERT
5157 if (CheckIntrinsics) {
5158 // Check for orphan methods in the current class. A method m
5159 // of a class C is orphan if an intrinsic is defined for method m,
5160 // but class C does not declare m.
5161 // The check is potentially expensive, therefore it is available
5162 // only in debug builds.
5163
5164 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5165 if (vmIntrinsics::_compiledLambdaForm == id) {
5166 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5167 // generated for the JVM from a LambdaForm and therefore no method
5168 // is defined for it.
5169 continue;
5170 }
5171
5172 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5173 // Check if the current class contains a method with the same
5174 // name, flags, signature.
5175 bool match = false;
5176 for (int j = 0; j < methods->length(); ++j) {
5177 const Method* method = methods->at(j);
5178 if (method->intrinsic_id() == id) {
5179 match = true;
5180 break;
5181 }
5182 }
5183
5184 if (!match) {
5185 char buf[1000];
5186 tty->print("Compiler intrinsic is defined for method [%s], "
5187 "but the method is not available in class [%s].%s",
5188 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5189 buf, sizeof(buf)),
5190 ik->name()->as_C_string(),
5191 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5192 );
5193 tty->cr();
5194 DEBUG_ONLY(vm_exit(1));
5195 }
5196 }
5197 } // end for
5198 } // CheckIntrinsics
5199 #endif // ASSERT
5200 }
5201 }
5202
5203 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5204 if (_klass != NULL) {
5205 return _klass;
5206 }
5207
5208 InstanceKlass* const ik =
5209 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5210
5211 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5212
5213 assert(_klass == ik, "invariant");
5214
5215 ik->set_has_passed_fingerprint_check(false);
5216 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5217 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5218 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5219 // This class matches with a class saved in an AOT library
5220 ik->set_has_passed_fingerprint_check(true);
5221 } else {
5222 ResourceMark rm;
5223 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5224 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5225 }
5226 }
5227
5228 return ik;
5229 }
5230
5231 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5232 assert(ik != NULL, "invariant");
5233
5234 set_klass_to_deallocate(ik);
5235
5236 assert(_field_info != NULL, "invariant");
5237 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5238 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5239 "sanity");
5240
5241 assert(ik->is_instance_klass(), "sanity");
5242 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5243
5244 // Fill in information already parsed
5245 ik->set_should_verify_class(_need_verify);
5246
5247 // Not yet: supers are done below to support the new subtype-checking fields
5248 ik->set_class_loader_data(_loader_data);
5249 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5250 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5251 assert(_fac != NULL, "invariant");
5252 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5253
5254 // this transfers ownership of a lot of arrays from
5255 // the parser onto the InstanceKlass*
5256 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5257
5258 // note that is not safe to use the fields in the parser from this point on
5259 assert(NULL == _cp, "invariant");
5260 assert(NULL == _fields, "invariant");
5261 assert(NULL == _methods, "invariant");
5262 assert(NULL == _inner_classes, "invariant");
5263 assert(NULL == _local_interfaces, "invariant");
5264 assert(NULL == _transitive_interfaces, "invariant");
5265 assert(NULL == _combined_annotations, "invariant");
5266
5267 if (_has_final_method) {
5268 ik->set_has_final_method();
5269 }
5270
5271 ik->copy_method_ordering(_method_ordering, CHECK);
5272 // The InstanceKlass::_methods_jmethod_ids cache
5273 // is managed on the assumption that the initial cache
5274 // size is equal to the number of methods in the class. If
5275 // that changes, then InstanceKlass::idnum_can_increment()
5276 // has to be changed accordingly.
5277 ik->set_initial_method_idnum(ik->methods()->length());
5278
5279 ik->set_name(_class_name);
5280
5281 if (is_anonymous()) {
5282 // I am well known to myself
5283 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve
5284 }
5285
5286 ik->set_minor_version(_minor_version);
5287 ik->set_major_version(_major_version);
5288 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5289 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5290
5291 if (_host_klass != NULL) {
5292 assert (ik->is_anonymous(), "should be the same");
5293 ik->set_host_klass(_host_klass);
5294 }
5295
5296 // Set PackageEntry for this_klass
5297 oop cl = ik->class_loader();
5298 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5299 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5300 ik->set_package(cld, CHECK);
5301
5302 const Array<Method*>* const methods = ik->methods();
5303 assert(methods != NULL, "invariant");
5304 const int methods_len = methods->length();
5305
5306 check_methods_for_intrinsics(ik, methods);
5307
5308 // Fill in field values obtained by parse_classfile_attributes
5309 if (_parsed_annotations->has_any_annotations()) {
5310 _parsed_annotations->apply_to(ik);
5311 }
5312
5313 apply_parsed_class_attributes(ik);
5314
5315 // Miranda methods
5316 if ((_num_miranda_methods > 0) ||
5317 // if this class introduced new miranda methods or
5318 (_super_klass != NULL && _super_klass->has_miranda_methods())
5319 // super class exists and this class inherited miranda methods
5320 ) {
5321 ik->set_has_miranda_methods(); // then set a flag
5322 }
5323
5324 // Fill in information needed to compute superclasses.
5325 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5326
5327 // Initialize itable offset tables
5328 klassItable::setup_itable_offset_table(ik);
5329
5330 // Compute transitive closure of interfaces this class implements
5331 // Do final class setup
5332 fill_oop_maps(ik,
5333 _field_info->nonstatic_oop_map_count,
5334 _field_info->nonstatic_oop_offsets,
5335 _field_info->nonstatic_oop_counts);
5336
5337 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5338 set_precomputed_flags(ik);
5339
5340 // check if this class can access its super class
5341 check_super_class_access(ik, CHECK);
5342
5343 // check if this class can access its superinterfaces
5344 check_super_interface_access(ik, CHECK);
5345
5346 // check if this class overrides any final method
5347 check_final_method_override(ik, CHECK);
5348
5349 // reject static interface methods prior to Java 8
5350 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5351 check_illegal_static_method(ik, CHECK);
5352 }
5353
5354 // Obtain this_klass' module entry
5355 ModuleEntry* module_entry = ik->module();
5356 assert(module_entry != NULL, "module_entry should always be set");
5357
5358 // Obtain java.lang.reflect.Module
5359 Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module()));
5360
5361 // Allocate mirror and initialize static fields
5362 // The create_mirror() call will also call compute_modifiers()
5363 java_lang_Class::create_mirror(ik,
5364 _loader_data->class_loader(),
5365 module_handle,
5366 _protection_domain,
5367 CHECK);
5368
5369 assert(_all_mirandas != NULL, "invariant");
5370
5371 // Generate any default methods - default methods are public interface methods
5372 // that have a default implementation. This is new with Java 8.
5373 if (_has_nonstatic_concrete_methods) {
5374 DefaultMethods::generate_default_methods(ik,
5375 _all_mirandas,
5376 CHECK);
5377 }
5378
5379 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5380 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5381 !module_entry->has_default_read_edges()) {
5382 if (!module_entry->set_has_default_read_edges()) {
5383 // We won a potential race
5384 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5385 }
5386 }
5387
5388 // Update the loader_data graph.
5389 record_defined_class_dependencies(ik, CHECK);
5390
5391 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5392
5393 if (!is_internal()) {
5394 if (log_is_enabled(Info, class, load)) {
5395 ResourceMark rm;
5396 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5397
5398 if (log_is_enabled(Info, class, load)) {
5399 ik->print_loading_log(LogLevel::Info, _loader_data, module_name, _stream);
5400 }
5401 // No 'else' here as logging levels are not mutually exclusive
5402 if (log_is_enabled(Debug, class, load)) {
5403 ik->print_loading_log(LogLevel::Debug, _loader_data, module_name, _stream);
5404 }
5405 }
5406
5407 if (log_is_enabled(Debug, class, resolve)) {
5408 ResourceMark rm;
5409 // print out the superclass.
5410 const char * from = ik->external_name();
5411 if (ik->java_super() != NULL) {
5412 log_debug(class, resolve)("%s %s (super)",
5413 from,
5414 ik->java_super()->external_name());
5415 }
5416 // print out each of the interface classes referred to by this class.
5417 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5418 if (local_interfaces != NULL) {
5419 const int length = local_interfaces->length();
5420 for (int i = 0; i < length; i++) {
5421 const Klass* const k = local_interfaces->at(i);
5422 const char * to = k->external_name();
5423 log_debug(class, resolve)("%s %s (interface)", from, to);
5424 }
5425 }
5426 }
5427 }
5428
5429 TRACE_INIT_ID(ik);
5430
5431 // If we reach here, all is well.
5432 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5433 // in order for it to not be destroyed in the ClassFileParser destructor.
5434 set_klass_to_deallocate(NULL);
5435
5436 // it's official
5437 set_klass(ik);
5438
5439 debug_only(ik->verify();)
5440 }
5441
5442 // For an anonymous class that is in the unnamed package, move it to its host class's
5443 // package by prepending its host class's package name to its class name and setting
5444 // its _class_name field.
5445 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5446 ResourceMark rm(THREAD);
5447 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5448 "Anonymous class should not be in a package");
5449 const char* host_pkg_name =
5450 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5451
5452 if (host_pkg_name != NULL) {
5453 size_t host_pkg_len = strlen(host_pkg_name);
5454 int class_name_len = _class_name->utf8_length();
5455 char* new_anon_name =
5456 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5457 // Copy host package name and trailing /.
5458 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5459 new_anon_name[host_pkg_len] = '/';
5460 // Append anonymous class name. The anonymous class name can contain odd
5461 // characters. So, do a strncpy instead of using sprintf("%s...").
5462 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5463
5464 // Create a symbol and update the anonymous class name.
5465 _class_name = SymbolTable::new_symbol(new_anon_name,
5466 (int)host_pkg_len + 1 + class_name_len,
5467 CHECK);
5468 }
5469 }
5470
5471 // If the host class and the anonymous class are in the same package then do
5472 // nothing. If the anonymous class is in the unnamed package then move it to its
5473 // host's package. If the classes are in different packages then throw an IAE
5474 // exception.
5475 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5476 assert(_host_klass != NULL, "Expected an anonymous class");
5477
5478 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5479 _class_name->utf8_length(), '/');
5480 if (anon_last_slash == NULL) { // Unnamed package
5481 prepend_host_package_name(_host_klass, CHECK);
5482 } else {
5483 if (!InstanceKlass::is_same_class_package(_host_klass->class_loader(),
5484 _host_klass->name(),
5485 _host_klass->class_loader(),
5486 _class_name)) {
5487 ResourceMark rm(THREAD);
5488 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5489 err_msg("Host class %s and anonymous class %s are in different packages",
5490 _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5491 }
5492 }
5493 }
5494
5495 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5496 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5497 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5498 bool need_verify =
5499 // verifyAll
5500 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5501 // verifyRemote
5502 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5503 return !need_verify;
5504 }
5505
5506 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5507 Symbol* name,
5508 ClassLoaderData* loader_data,
5509 Handle protection_domain,
5510 const InstanceKlass* host_klass,
5511 GrowableArray<Handle>* cp_patches,
5512 Publicity pub_level,
5513 TRAPS) :
5514 _stream(stream),
5515 _requested_name(name),
5516 _loader_data(loader_data),
5517 _host_klass(host_klass),
5518 _cp_patches(cp_patches),
5519 _super_klass(),
5520 _cp(NULL),
5521 _fields(NULL),
5522 _methods(NULL),
5523 _inner_classes(NULL),
5524 _local_interfaces(NULL),
5525 _transitive_interfaces(NULL),
5526 _combined_annotations(NULL),
5527 _annotations(NULL),
5528 _type_annotations(NULL),
5529 _fields_annotations(NULL),
5530 _fields_type_annotations(NULL),
5531 _klass(NULL),
5532 _klass_to_deallocate(NULL),
5533 _parsed_annotations(NULL),
5534 _fac(NULL),
5535 _field_info(NULL),
5536 _method_ordering(NULL),
5537 _all_mirandas(NULL),
5538 _vtable_size(0),
5539 _itable_size(0),
5540 _num_miranda_methods(0),
5541 _rt(REF_NONE),
5542 _protection_domain(protection_domain),
5543 _access_flags(),
5544 _pub_level(pub_level),
5545 _synthetic_flag(false),
5546 _sde_length(false),
5547 _sde_buffer(NULL),
5548 _sourcefile_index(0),
5549 _generic_signature_index(0),
5550 _major_version(0),
5551 _minor_version(0),
5552 _this_class_index(0),
5553 _super_class_index(0),
5554 _itfs_len(0),
5555 _java_fields_count(0),
5556 _need_verify(false),
5557 _relax_verify(false),
5558 _has_nonstatic_concrete_methods(false),
5559 _declares_nonstatic_concrete_methods(false),
5560 _has_final_method(false),
5561 _has_finalizer(false),
5562 _has_empty_finalizer(false),
5563 _has_vanilla_constructor(false),
5564 _max_bootstrap_specifier_index(-1) {
5565
5566 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5567
5568 assert(THREAD->is_Java_thread(), "invariant");
5569 assert(_loader_data != NULL, "invariant");
5570 assert(stream != NULL, "invariant");
5571 assert(_stream != NULL, "invariant");
5572 assert(_stream->buffer() == _stream->current(), "invariant");
5573 assert(_class_name != NULL, "invariant");
5574 assert(0 == _access_flags.as_int(), "invariant");
5575
5576 // Figure out whether we can skip format checking (matching classic VM behavior)
5577 if (DumpSharedSpaces) {
5578 // verify == true means it's a 'remote' class (i.e., non-boot class)
5579 // Verification decision is based on BytecodeVerificationRemote flag
5580 // for those classes.
5581 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5582 BytecodeVerificationLocal;
5583 }
5584 else {
5585 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5586 stream->need_verify());
5587 }
5588
5589 // synch back verification state to stream
5590 stream->set_verify(_need_verify);
5591
5592 // Check if verification needs to be relaxed for this class file
5593 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5594 _relax_verify = relax_format_check_for(_loader_data);
5595
5596 parse_stream(stream, CHECK);
5597
5598 post_process_parsed_stream(stream, _cp, CHECK);
5599 }
5600
5601 void ClassFileParser::clear_class_metadata() {
5602 // metadata created before the instance klass is created. Must be
5603 // deallocated if classfile parsing returns an error.
5604 _cp = NULL;
5605 _fields = NULL;
5606 _methods = NULL;
5607 _inner_classes = NULL;
5608 _local_interfaces = NULL;
5609 _transitive_interfaces = NULL;
5610 _combined_annotations = NULL;
5611 _annotations = _type_annotations = NULL;
5612 _fields_annotations = _fields_type_annotations = NULL;
5613 }
5614
5615 // Destructor to clean up
5616 ClassFileParser::~ClassFileParser() {
5617 if (_cp != NULL) {
5618 MetadataFactory::free_metadata(_loader_data, _cp);
5619 }
5620 if (_fields != NULL) {
5621 MetadataFactory::free_array<u2>(_loader_data, _fields);
5622 }
5623
5624 if (_methods != NULL) {
5625 // Free methods
5626 InstanceKlass::deallocate_methods(_loader_data, _methods);
5627 }
5628
5629 // beware of the Universe::empty_blah_array!!
5630 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5631 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5632 }
5633
5634 // Free interfaces
5635 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5636 _local_interfaces, _transitive_interfaces);
5637
5638 if (_combined_annotations != NULL) {
5639 // After all annotations arrays have been created, they are installed into the
5640 // Annotations object that will be assigned to the InstanceKlass being created.
5641
5642 // Deallocate the Annotations object and the installed annotations arrays.
5643 _combined_annotations->deallocate_contents(_loader_data);
5644
5645 // If the _combined_annotations pointer is non-NULL,
5646 // then the other annotations fields should have been cleared.
5647 assert(_annotations == NULL, "Should have been cleared");
5648 assert(_type_annotations == NULL, "Should have been cleared");
5649 assert(_fields_annotations == NULL, "Should have been cleared");
5650 assert(_fields_type_annotations == NULL, "Should have been cleared");
5651 } else {
5652 // If the annotations arrays were not installed into the Annotations object,
5653 // then they have to be deallocated explicitly.
5654 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5655 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5656 Annotations::free_contents(_loader_data, _fields_annotations);
5657 Annotations::free_contents(_loader_data, _fields_type_annotations);
5658 }
5659
5660 clear_class_metadata();
5661
5662 // deallocate the klass if already created. Don't directly deallocate, but add
5663 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5664 // at a safepoint.
5665 if (_klass_to_deallocate != NULL) {
5666 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5667 }
5668 }
5669
5670 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5671 TRAPS) {
5672
5673 assert(stream != NULL, "invariant");
5674 assert(_class_name != NULL, "invariant");
5675
5676 // BEGIN STREAM PARSING
5677 stream->guarantee_more(8, CHECK); // magic, major, minor
5678 // Magic value
5679 const u4 magic = stream->get_u4_fast();
5680 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5681 "Incompatible magic value %u in class file %s",
5682 magic, CHECK);
5683
5684 // Version numbers
5685 _minor_version = stream->get_u2_fast();
5686 _major_version = stream->get_u2_fast();
5687
5688 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5689 ResourceMark rm;
5690 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5691 _major_version, _minor_version, _class_name->as_C_string());
5692 Exceptions::fthrow(
5693 THREAD_AND_LOCATION,
5694 vmSymbols::java_lang_UnsupportedClassVersionError(),
5695 "Unsupported major.minor version for dump time %u.%u",
5696 _major_version,
5697 _minor_version);
5698 }
5699
5700 // Check version numbers - we check this even with verifier off
5701 if (!is_supported_version(_major_version, _minor_version)) {
5702 ResourceMark rm(THREAD);
5703 Exceptions::fthrow(
5704 THREAD_AND_LOCATION,
5705 vmSymbols::java_lang_UnsupportedClassVersionError(),
5706 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5707 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
5708 _class_name->as_C_string(),
5709 _major_version,
5710 _minor_version,
5711 JAVA_MAX_SUPPORTED_VERSION,
5712 JAVA_MAX_SUPPORTED_MINOR_VERSION);
5713 return;
5714 }
5715
5716 stream->guarantee_more(3, CHECK); // length, first cp tag
5717 const u2 cp_size = stream->get_u2_fast();
5718
5719 guarantee_property(
5720 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5721 cp_size, CHECK);
5722
5723 _cp = ConstantPool::allocate(_loader_data,
5724 cp_size,
5725 CHECK);
5726
5727 ConstantPool* const cp = _cp;
5728
5729 parse_constant_pool(stream, cp, cp_size, CHECK);
5730
5731 assert(cp_size == (const u2)cp->length(), "invariant");
5732
5733 // ACCESS FLAGS
5734 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5735
5736 // Access flags
5737 jint flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5738
5739 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5740 // Set abstract bit for old class files for backward compatibility
5741 flags |= JVM_ACC_ABSTRACT;
5742 }
5743
5744 _access_flags.set_flags(flags);
5745
5746 verify_legal_class_modifiers((jint)_access_flags.as_int(), CHECK);
5747
5748 // This class and superclass
5749 _this_class_index = stream->get_u2_fast();
5750 check_property(
5751 valid_cp_range(_this_class_index, cp_size) &&
5752 cp->tag_at(_this_class_index).is_unresolved_klass(),
5753 "Invalid this class index %u in constant pool in class file %s",
5754 _this_class_index, CHECK);
5755
5756 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5757 assert(class_name_in_cp != NULL, "class_name can't be null");
5758
5759 // Update _class_name which could be null previously
5760 // to reflect the name in the constant pool
5761 _class_name = class_name_in_cp;
5762
5763 // Don't need to check whether this class name is legal or not.
5764 // It has been checked when constant pool is parsed.
5765 // However, make sure it is not an array type.
5766 if (_need_verify) {
5767 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
5768 "Bad class name in class file %s",
5769 CHECK);
5770 }
5771
5772 // Checks if name in class file matches requested name
5773 if (_requested_name != NULL && _requested_name != _class_name) {
5774 ResourceMark rm(THREAD);
5775 Exceptions::fthrow(
5776 THREAD_AND_LOCATION,
5777 vmSymbols::java_lang_NoClassDefFoundError(),
5778 "%s (wrong name: %s)",
5779 _class_name->as_C_string(),
5780 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
5781 );
5782 return;
5783 }
5784
5785 // if this is an anonymous class fix up its name if it's in the unnamed
5786 // package. Otherwise, throw IAE if it is in a different package than
5787 // its host class.
5788 if (_host_klass != NULL) {
5789 fix_anonymous_class_name(CHECK);
5790 }
5791
5792 // Verification prevents us from creating names with dots in them, this
5793 // asserts that that's the case.
5794 assert(is_internal_format(_class_name), "external class name format used internally");
5795
5796 if (!is_internal()) {
5797 if (log_is_enabled(Debug, class, preorder)){
5798 ResourceMark rm(THREAD);
5799 outputStream* log = Log(class, preorder)::debug_stream();
5800 log->print("%s", _class_name->as_klass_external_name());
5801 if (stream->source() != NULL) {
5802 log->print(" source: %s", stream->source());
5803 }
5804 log->cr();
5805 }
5806
5807 #if INCLUDE_CDS
5808 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5809 // Only dump the classes that can be stored into CDS archive.
5810 // Anonymous classes such as generated LambdaForm classes are also not included.
5811 if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
5812 _host_klass == NULL) {
5813 oop class_loader = _loader_data->class_loader();
5814 ResourceMark rm(THREAD);
5815 // For the boot and platform class loaders, check if the class is not found in the
5816 // java runtime image. Additional check for the boot class loader is if the class
5817 // is not found in the boot loader's appended entries. This indicates that the class
5818 // is not useable during run time, such as the ones found in the --patch-module entries,
5819 // so it should not be included in the classlist file.
5820 if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) ||
5821 SystemDictionary::is_platform_class_loader(class_loader)) &&
5822 !ClassLoader::is_jrt(stream->source())) {
5823 tty->print_cr("skip writing class %s from source %s to classlist file",
5824 _class_name->as_C_string(), stream->source());
5825 } else {
5826 classlist_file->print_cr("%s", _class_name->as_C_string());
5827 classlist_file->flush();
5828 }
5829 }
5830 }
5831 #endif
5832 }
5833
5834 // SUPERKLASS
5835 _super_class_index = stream->get_u2_fast();
5836 _super_klass = parse_super_class(cp,
5837 _super_class_index,
5838 _need_verify,
5839 CHECK);
5840
5841 // Interfaces
5842 _itfs_len = stream->get_u2_fast();
5843 parse_interfaces(stream,
5844 _itfs_len,
5845 cp,
5846 &_has_nonstatic_concrete_methods,
5847 CHECK);
5848
5849 assert(_local_interfaces != NULL, "invariant");
5850
5851 // Fields (offsets are filled in later)
5852 _fac = new FieldAllocationCount();
5853 parse_fields(stream,
5854 _access_flags.is_interface(),
5855 _fac,
5856 cp,
5857 cp_size,
5858 &_java_fields_count,
5859 CHECK);
5860
5861 assert(_fields != NULL, "invariant");
5862
5863 // Methods
5864 AccessFlags promoted_flags;
5865 parse_methods(stream,
5866 _access_flags.is_interface(),
5867 &promoted_flags,
5868 &_has_final_method,
5869 &_declares_nonstatic_concrete_methods,
5870 CHECK);
5871
5872 assert(_methods != NULL, "invariant");
5873
5874 // promote flags from parse_methods() to the klass' flags
5875 _access_flags.add_promoted_flags(promoted_flags.as_int());
5876
5877 if (_declares_nonstatic_concrete_methods) {
5878 _has_nonstatic_concrete_methods = true;
5879 }
5880
5881 // Additional attributes/annotations
5882 _parsed_annotations = new ClassAnnotationCollector();
5883 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5884
5885 assert(_inner_classes != NULL, "invariant");
5886
5887 // Finalize the Annotations metadata object,
5888 // now that all annotation arrays have been created.
5889 create_combined_annotations(CHECK);
5890
5891 // Make sure this is the end of class file stream
5892 guarantee_property(stream->at_eos(),
5893 "Extra bytes at the end of class file %s",
5894 CHECK);
5895
5896 // all bytes in stream read and parsed
5897 }
5898
5899 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5900 ConstantPool* cp,
5901 TRAPS) {
5902 assert(stream != NULL, "invariant");
5903 assert(stream->at_eos(), "invariant");
5904 assert(cp != NULL, "invariant");
5905 assert(_loader_data != NULL, "invariant");
5906
5907 if (_class_name == vmSymbols::java_lang_Object()) {
5908 check_property(_local_interfaces == Universe::the_empty_klass_array(),
5909 "java.lang.Object cannot implement an interface in class file %s",
5910 CHECK);
5911 }
5912 // We check super class after class file is parsed and format is checked
5913 if (_super_class_index > 0 && NULL ==_super_klass) {
5914 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5915 if (_access_flags.is_interface()) {
5916 // Before attempting to resolve the superclass, check for class format
5917 // errors not checked yet.
5918 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5919 "Interfaces must have java.lang.Object as superclass in class file %s",
5920 CHECK);
5921 }
5922 _super_klass = (const InstanceKlass*)
5923 SystemDictionary::resolve_super_or_fail(_class_name,
5924 super_class_name,
5925 _loader_data->class_loader(),
5926 _protection_domain,
5927 true,
5928 CHECK);
5929 }
5930
5931 if (_super_klass != NULL) {
5932 if (_super_klass->has_nonstatic_concrete_methods()) {
5933 _has_nonstatic_concrete_methods = true;
5934 }
5935
5936 if (_super_klass->is_interface()) {
5937 ResourceMark rm(THREAD);
5938 Exceptions::fthrow(
5939 THREAD_AND_LOCATION,
5940 vmSymbols::java_lang_IncompatibleClassChangeError(),
5941 "class %s has interface %s as super class",
5942 _class_name->as_klass_external_name(),
5943 _super_klass->external_name()
5944 );
5945 return;
5946 }
5947 // Make sure super class is not final
5948 if (_super_klass->is_final()) {
5949 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
5950 }
5951 }
5952
5953 // Compute the transitive list of all unique interfaces implemented by this class
5954 _transitive_interfaces =
5955 compute_transitive_interfaces(_super_klass,
5956 _local_interfaces,
5957 _loader_data,
5958 CHECK);
5959
5960 assert(_transitive_interfaces != NULL, "invariant");
5961
5962 // sort methods
5963 _method_ordering = sort_methods(_methods);
5964
5965 _all_mirandas = new GrowableArray<Method*>(20);
5966
5967 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5968 &_num_miranda_methods,
5969 _all_mirandas,
5970 _super_klass,
5971 _methods,
5972 _access_flags,
5973 _major_version,
5974 _loader_data->class_loader(),
5975 _class_name,
5976 _local_interfaces,
5977 CHECK);
5978
5979 // Size of Java itable (in words)
5980 _itable_size = _access_flags.is_interface() ? 0 :
5981 klassItable::compute_itable_size(_transitive_interfaces);
5982
5983 assert(_fac != NULL, "invariant");
5984 assert(_parsed_annotations != NULL, "invariant");
5985
5986 _field_info = new FieldLayoutInfo();
5987 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
5988
5989 // Compute reference typ
5990 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
5991
5992 }
5993
5994 void ClassFileParser::set_klass(InstanceKlass* klass) {
5995
5996 #ifdef ASSERT
5997 if (klass != NULL) {
5998 assert(NULL == _klass, "leaking?");
5999 }
6000 #endif
6001
6002 _klass = klass;
6003 }
6004
6005 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6006
6007 #ifdef ASSERT
6008 if (klass != NULL) {
6009 assert(NULL == _klass_to_deallocate, "leaking?");
6010 }
6011 #endif
6012
6013 _klass_to_deallocate = klass;
6014 }
6015
6016 // Caller responsible for ResourceMark
6017 // clone stream with rewound position
6018 const ClassFileStream* ClassFileParser::clone_stream() const {
6019 assert(_stream != NULL, "invariant");
6020
6021 return _stream->clone();
6022 }
6023 // ----------------------------------------------------------------------------
6024 // debugging
6025
6026 #ifdef ASSERT
6027
6028 // return true if class_name contains no '.' (internal format is '/')
6029 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6030 if (class_name != NULL) {
6031 ResourceMark rm;
6032 char* name = class_name->as_C_string();
6033 return strchr(name, '.') == NULL;
6034 } else {
6035 return true;
6036 }
6037 }
6038
6039 #endif