1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24 #include "precompiled.hpp"
25 #include "aot/aotLoader.hpp"
26 #include "classfile/classFileParser.hpp"
27 #include "classfile/classFileStream.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/defaultMethods.hpp"
31 #include "classfile/dictionary.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/moduleEntry.hpp"
34 #include "classfile/symbolTable.hpp"
35 #include "classfile/systemDictionary.hpp"
36 #include "classfile/verificationType.hpp"
37 #include "classfile/verifier.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "gc/shared/gcLocker.hpp"
40 #include "logging/log.hpp"
41 #include "memory/allocation.hpp"
42 #include "memory/metadataFactory.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "memory/universe.inline.hpp"
46 #include "oops/annotations.hpp"
47 #include "oops/fieldStreams.hpp"
48 #include "oops/instanceKlass.hpp"
49 #include "oops/instanceMirrorKlass.hpp"
50 #include "oops/klass.inline.hpp"
51 #include "oops/klassVtable.hpp"
52 #include "oops/metadata.hpp"
53 #include "oops/method.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "oops/symbol.hpp"
56 #include "prims/jvm.h"
57 #include "prims/jvmtiExport.hpp"
58 #include "prims/jvmtiThreadState.hpp"
59 #include "runtime/javaCalls.hpp"
60 #include "runtime/perfData.hpp"
61 #include "runtime/reflection.hpp"
62 #include "runtime/signature.hpp"
63 #include "runtime/timer.hpp"
64 #include "services/classLoadingService.hpp"
65 #include "services/threadService.hpp"
66 #include "trace/traceMacros.hpp"
67 #include "utilities/array.hpp"
68 #include "utilities/exceptions.hpp"
69 #include "utilities/globalDefinitions.hpp"
70 #include "utilities/macros.hpp"
71 #include "utilities/ostream.hpp"
72 #include "utilities/resourceHash.hpp"
73 #if INCLUDE_CDS
74 #include "classfile/systemDictionaryShared.hpp"
75 #endif
76
77 // We generally try to create the oops directly when parsing, rather than
78 // allocating temporary data structures and copying the bytes twice. A
79 // temporary area is only needed when parsing utf8 entries in the constant
80 // pool and when parsing line number tables.
81
82 // We add assert in debug mode when class format is not checked.
83
84 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
85 #define JAVA_MIN_SUPPORTED_VERSION 45
86 #define JAVA_MAX_SUPPORTED_VERSION 53
87 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
88
89 // Used for two backward compatibility reasons:
90 // - to check for new additions to the class file format in JDK1.5
91 // - to check for bug fixes in the format checker in JDK1.5
92 #define JAVA_1_5_VERSION 49
93
94 // Used for backward compatibility reasons:
95 // - to check for javac bug fixes that happened after 1.5
96 // - also used as the max version when running in jdk6
97 #define JAVA_6_VERSION 50
98
99 // Used for backward compatibility reasons:
100 // - to disallow argument and require ACC_STATIC for <clinit> methods
101 #define JAVA_7_VERSION 51
102
103 // Extension method support.
104 #define JAVA_8_VERSION 52
105
106 #define JAVA_9_VERSION 53
107
108 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
109 ConstantPool* cp,
110 const int length,
111 TRAPS) {
112 assert(stream != NULL, "invariant");
113 assert(cp != NULL, "invariant");
114
115 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
116 // this function (_current can be allocated in a register, with scalar
117 // replacement of aggregates). The _current pointer is copied back to
118 // stream() when this function returns. DON'T call another method within
119 // this method that uses stream().
120 const ClassFileStream cfs1 = *stream;
121 const ClassFileStream* const cfs = &cfs1;
122
123 assert(cfs->allocated_on_stack(), "should be local");
124 debug_only(const u1* const old_current = stream->current();)
125
126 // Used for batching symbol allocations.
127 const char* names[SymbolTable::symbol_alloc_batch_size];
128 int lengths[SymbolTable::symbol_alloc_batch_size];
129 int indices[SymbolTable::symbol_alloc_batch_size];
130 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
131 int names_count = 0;
132
133 // parsing Index 0 is unused
134 for (int index = 1; index < length; index++) {
135 // Each of the following case guarantees one more byte in the stream
136 // for the following tag or the access_flags following constant pool,
137 // so we don't need bounds-check for reading tag.
138 const u1 tag = cfs->get_u1_fast();
139 switch (tag) {
140 case JVM_CONSTANT_Class : {
141 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
142 const u2 name_index = cfs->get_u2_fast();
143 cp->klass_index_at_put(index, name_index);
144 break;
145 }
146 case JVM_CONSTANT_Fieldref: {
147 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
148 const u2 class_index = cfs->get_u2_fast();
149 const u2 name_and_type_index = cfs->get_u2_fast();
150 cp->field_at_put(index, class_index, name_and_type_index);
151 break;
152 }
153 case JVM_CONSTANT_Methodref: {
154 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
155 const u2 class_index = cfs->get_u2_fast();
156 const u2 name_and_type_index = cfs->get_u2_fast();
157 cp->method_at_put(index, class_index, name_and_type_index);
158 break;
159 }
160 case JVM_CONSTANT_InterfaceMethodref: {
161 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
162 const u2 class_index = cfs->get_u2_fast();
163 const u2 name_and_type_index = cfs->get_u2_fast();
164 cp->interface_method_at_put(index, class_index, name_and_type_index);
165 break;
166 }
167 case JVM_CONSTANT_String : {
168 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
169 const u2 string_index = cfs->get_u2_fast();
170 cp->string_index_at_put(index, string_index);
171 break;
172 }
173 case JVM_CONSTANT_MethodHandle :
174 case JVM_CONSTANT_MethodType: {
175 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
176 classfile_parse_error(
177 "Class file version does not support constant tag %u in class file %s",
178 tag, CHECK);
179 }
180 if (tag == JVM_CONSTANT_MethodHandle) {
181 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
182 const u1 ref_kind = cfs->get_u1_fast();
183 const u2 method_index = cfs->get_u2_fast();
184 cp->method_handle_index_at_put(index, ref_kind, method_index);
185 }
186 else if (tag == JVM_CONSTANT_MethodType) {
187 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
188 const u2 signature_index = cfs->get_u2_fast();
189 cp->method_type_index_at_put(index, signature_index);
190 }
191 else {
192 ShouldNotReachHere();
193 }
194 break;
195 }
196 case JVM_CONSTANT_InvokeDynamic : {
197 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
198 classfile_parse_error(
199 "Class file version does not support constant tag %u in class file %s",
200 tag, CHECK);
201 }
202 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
203 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
204 const u2 name_and_type_index = cfs->get_u2_fast();
205 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
206 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
207 }
208 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
209 break;
210 }
211 case JVM_CONSTANT_Integer: {
212 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
213 const u4 bytes = cfs->get_u4_fast();
214 cp->int_at_put(index, (jint)bytes);
215 break;
216 }
217 case JVM_CONSTANT_Float: {
218 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
219 const u4 bytes = cfs->get_u4_fast();
220 cp->float_at_put(index, *(jfloat*)&bytes);
221 break;
222 }
223 case JVM_CONSTANT_Long: {
224 // A mangled type might cause you to overrun allocated memory
225 guarantee_property(index + 1 < length,
226 "Invalid constant pool entry %u in class file %s",
227 index,
228 CHECK);
229 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
230 const u8 bytes = cfs->get_u8_fast();
231 cp->long_at_put(index, bytes);
232 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
233 break;
234 }
235 case JVM_CONSTANT_Double: {
236 // A mangled type might cause you to overrun allocated memory
237 guarantee_property(index+1 < length,
238 "Invalid constant pool entry %u in class file %s",
239 index,
240 CHECK);
241 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
242 const u8 bytes = cfs->get_u8_fast();
243 cp->double_at_put(index, *(jdouble*)&bytes);
244 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
245 break;
246 }
247 case JVM_CONSTANT_NameAndType: {
248 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
249 const u2 name_index = cfs->get_u2_fast();
250 const u2 signature_index = cfs->get_u2_fast();
251 cp->name_and_type_at_put(index, name_index, signature_index);
252 break;
253 }
254 case JVM_CONSTANT_Utf8 : {
255 cfs->guarantee_more(2, CHECK); // utf8_length
256 u2 utf8_length = cfs->get_u2_fast();
257 const u1* utf8_buffer = cfs->get_u1_buffer();
258 assert(utf8_buffer != NULL, "null utf8 buffer");
259 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
260 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
261 cfs->skip_u1_fast(utf8_length);
262
263 // Before storing the symbol, make sure it's legal
264 if (_need_verify) {
265 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
266 }
267
268 if (has_cp_patch_at(index)) {
269 Handle patch = clear_cp_patch_at(index);
270 guarantee_property(java_lang_String::is_instance(patch()),
271 "Illegal utf8 patch at %d in class file %s",
272 index,
273 CHECK);
274 const char* const str = java_lang_String::as_utf8_string(patch());
275 // (could use java_lang_String::as_symbol instead, but might as well batch them)
276 utf8_buffer = (const u1*) str;
277 utf8_length = (int) strlen(str);
278 }
279
280 unsigned int hash;
281 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
282 utf8_length,
283 hash);
284 if (result == NULL) {
285 names[names_count] = (const char*)utf8_buffer;
286 lengths[names_count] = utf8_length;
287 indices[names_count] = index;
288 hashValues[names_count++] = hash;
289 if (names_count == SymbolTable::symbol_alloc_batch_size) {
290 SymbolTable::new_symbols(_loader_data,
291 cp,
292 names_count,
293 names,
294 lengths,
295 indices,
296 hashValues,
297 CHECK);
298 names_count = 0;
299 }
300 } else {
301 cp->symbol_at_put(index, result);
302 }
303 break;
304 }
305 default: {
306 classfile_parse_error("Unknown constant tag %u in class file %s",
307 tag,
308 CHECK);
309 break;
310 }
311 } // end of switch(tag)
312 } // end of for
313
314 // Allocate the remaining symbols
315 if (names_count > 0) {
316 SymbolTable::new_symbols(_loader_data,
317 cp,
318 names_count,
319 names,
320 lengths,
321 indices,
322 hashValues,
323 CHECK);
324 }
325
326 // Copy _current pointer of local copy back to stream.
327 assert(stream->current() == old_current, "non-exclusive use of stream");
328 stream->set_current(cfs1.current());
329
330 }
331
332 static inline bool valid_cp_range(int index, int length) {
333 return (index > 0 && index < length);
334 }
335
336 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
337 assert(cp != NULL, "invariant");
338 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
339 return cp->symbol_at(index);
340 }
341 return NULL;
342 }
343
344 #ifdef ASSERT
345 PRAGMA_DIAG_PUSH
346 PRAGMA_FORMAT_NONLITERAL_IGNORED
347 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
348 ResourceMark rm(THREAD);
349 fatal(msg, _class_name->as_C_string());
350 }
351
352 void ClassFileParser::report_assert_property_failure(const char* msg,
353 int index,
354 TRAPS) const {
355 ResourceMark rm(THREAD);
356 fatal(msg, index, _class_name->as_C_string());
357 }
358 PRAGMA_DIAG_POP
359 #endif
360
361 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
362 ConstantPool* const cp,
363 const int length,
364 TRAPS) {
365 assert(cp != NULL, "invariant");
366 assert(stream != NULL, "invariant");
367
368 // parsing constant pool entries
369 parse_constant_pool_entries(stream, cp, length, CHECK);
370
371 int index = 1; // declared outside of loops for portability
372
373 // first verification pass - validate cross references
374 // and fixup class and string constants
375 for (index = 1; index < length; index++) { // Index 0 is unused
376 const jbyte tag = cp->tag_at(index).value();
377 switch (tag) {
378 case JVM_CONSTANT_Class: {
379 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
380 break;
381 }
382 case JVM_CONSTANT_Fieldref:
383 // fall through
384 case JVM_CONSTANT_Methodref:
385 // fall through
386 case JVM_CONSTANT_InterfaceMethodref: {
387 if (!_need_verify) break;
388 const int klass_ref_index = cp->klass_ref_index_at(index);
389 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
390 check_property(valid_klass_reference_at(klass_ref_index),
391 "Invalid constant pool index %u in class file %s",
392 klass_ref_index, CHECK);
393 check_property(valid_cp_range(name_and_type_ref_index, length) &&
394 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
395 "Invalid constant pool index %u in class file %s",
396 name_and_type_ref_index, CHECK);
397 break;
398 }
399 case JVM_CONSTANT_String: {
400 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
401 break;
402 }
403 case JVM_CONSTANT_Integer:
404 break;
405 case JVM_CONSTANT_Float:
406 break;
407 case JVM_CONSTANT_Long:
408 case JVM_CONSTANT_Double: {
409 index++;
410 check_property(
411 (index < length && cp->tag_at(index).is_invalid()),
412 "Improper constant pool long/double index %u in class file %s",
413 index, CHECK);
414 break;
415 }
416 case JVM_CONSTANT_NameAndType: {
417 if (!_need_verify) break;
418 const int name_ref_index = cp->name_ref_index_at(index);
419 const int signature_ref_index = cp->signature_ref_index_at(index);
420 check_property(valid_symbol_at(name_ref_index),
421 "Invalid constant pool index %u in class file %s",
422 name_ref_index, CHECK);
423 check_property(valid_symbol_at(signature_ref_index),
424 "Invalid constant pool index %u in class file %s",
425 signature_ref_index, CHECK);
426 break;
427 }
428 case JVM_CONSTANT_Utf8:
429 break;
430 case JVM_CONSTANT_UnresolvedClass: // fall-through
431 case JVM_CONSTANT_UnresolvedClassInError: {
432 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
433 break;
434 }
435 case JVM_CONSTANT_ClassIndex: {
436 const int class_index = cp->klass_index_at(index);
437 check_property(valid_symbol_at(class_index),
438 "Invalid constant pool index %u in class file %s",
439 class_index, CHECK);
440 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
441 break;
442 }
443 case JVM_CONSTANT_StringIndex: {
444 const int string_index = cp->string_index_at(index);
445 check_property(valid_symbol_at(string_index),
446 "Invalid constant pool index %u in class file %s",
447 string_index, CHECK);
448 Symbol* const sym = cp->symbol_at(string_index);
449 cp->unresolved_string_at_put(index, sym);
450 break;
451 }
452 case JVM_CONSTANT_MethodHandle: {
453 const int ref_index = cp->method_handle_index_at(index);
454 check_property(valid_cp_range(ref_index, length),
455 "Invalid constant pool index %u in class file %s",
456 ref_index, CHECK);
457 const constantTag tag = cp->tag_at(ref_index);
458 const int ref_kind = cp->method_handle_ref_kind_at(index);
459
460 switch (ref_kind) {
461 case JVM_REF_getField:
462 case JVM_REF_getStatic:
463 case JVM_REF_putField:
464 case JVM_REF_putStatic: {
465 check_property(
466 tag.is_field(),
467 "Invalid constant pool index %u in class file %s (not a field)",
468 ref_index, CHECK);
469 break;
470 }
471 case JVM_REF_invokeVirtual:
472 case JVM_REF_newInvokeSpecial: {
473 check_property(
474 tag.is_method(),
475 "Invalid constant pool index %u in class file %s (not a method)",
476 ref_index, CHECK);
477 break;
478 }
479 case JVM_REF_invokeStatic:
480 case JVM_REF_invokeSpecial: {
481 check_property(
482 tag.is_method() ||
483 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
484 "Invalid constant pool index %u in class file %s (not a method)",
485 ref_index, CHECK);
486 break;
487 }
488 case JVM_REF_invokeInterface: {
489 check_property(
490 tag.is_interface_method(),
491 "Invalid constant pool index %u in class file %s (not an interface method)",
492 ref_index, CHECK);
493 break;
494 }
495 default: {
496 classfile_parse_error(
497 "Bad method handle kind at constant pool index %u in class file %s",
498 index, CHECK);
499 }
500 } // switch(refkind)
501 // Keep the ref_index unchanged. It will be indirected at link-time.
502 break;
503 } // case MethodHandle
504 case JVM_CONSTANT_MethodType: {
505 const int ref_index = cp->method_type_index_at(index);
506 check_property(valid_symbol_at(ref_index),
507 "Invalid constant pool index %u in class file %s",
508 ref_index, CHECK);
509 break;
510 }
511 case JVM_CONSTANT_InvokeDynamic: {
512 const int name_and_type_ref_index =
513 cp->invoke_dynamic_name_and_type_ref_index_at(index);
514
515 check_property(valid_cp_range(name_and_type_ref_index, length) &&
516 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
517 "Invalid constant pool index %u in class file %s",
518 name_and_type_ref_index, CHECK);
519 // bootstrap specifier index must be checked later,
520 // when BootstrapMethods attr is available
521 break;
522 }
523 default: {
524 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
525 ShouldNotReachHere();
526 break;
527 }
528 } // switch(tag)
529 } // end of for
530
531 if (_cp_patches != NULL) {
532 // need to treat this_class specially...
533 int this_class_index;
534 {
535 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
536 const u1* const mark = stream->current();
537 stream->skip_u2_fast(1); // skip flags
538 this_class_index = stream->get_u2_fast();
539 stream->set_current(mark); // revert to mark
540 }
541
542 for (index = 1; index < length; index++) { // Index 0 is unused
543 if (has_cp_patch_at(index)) {
544 guarantee_property(index != this_class_index,
545 "Illegal constant pool patch to self at %d in class file %s",
546 index, CHECK);
547 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
548 }
549 }
550 }
551
552 if (!_need_verify) {
553 return;
554 }
555
556 // second verification pass - checks the strings are of the right format.
557 // but not yet to the other entries
558 for (index = 1; index < length; index++) {
559 const jbyte tag = cp->tag_at(index).value();
560 switch (tag) {
561 case JVM_CONSTANT_UnresolvedClass: {
562 const Symbol* const class_name = cp->klass_name_at(index);
563 // check the name, even if _cp_patches will overwrite it
564 verify_legal_class_name(class_name, CHECK);
565 break;
566 }
567 case JVM_CONSTANT_NameAndType: {
568 if (_need_verify) {
569 const int sig_index = cp->signature_ref_index_at(index);
570 const int name_index = cp->name_ref_index_at(index);
571 const Symbol* const name = cp->symbol_at(name_index);
572 const Symbol* const sig = cp->symbol_at(sig_index);
573 guarantee_property(sig->utf8_length() != 0,
574 "Illegal zero length constant pool entry at %d in class %s",
575 sig_index, CHECK);
576 guarantee_property(name->utf8_length() != 0,
577 "Illegal zero length constant pool entry at %d in class %s",
578 name_index, CHECK);
579
580 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
581 // Format check method name and signature
582 verify_legal_method_name(name, CHECK);
583 verify_legal_method_signature(name, sig, CHECK);
584 } else {
585 // Format check field name and signature
586 verify_legal_field_name(name, CHECK);
587 verify_legal_field_signature(name, sig, CHECK);
588 }
589 }
590 break;
591 }
592 case JVM_CONSTANT_InvokeDynamic:
593 case JVM_CONSTANT_Fieldref:
594 case JVM_CONSTANT_Methodref:
595 case JVM_CONSTANT_InterfaceMethodref: {
596 const int name_and_type_ref_index =
597 cp->name_and_type_ref_index_at(index);
598 // already verified to be utf8
599 const int name_ref_index =
600 cp->name_ref_index_at(name_and_type_ref_index);
601 // already verified to be utf8
602 const int signature_ref_index =
603 cp->signature_ref_index_at(name_and_type_ref_index);
604 const Symbol* const name = cp->symbol_at(name_ref_index);
605 const Symbol* const signature = cp->symbol_at(signature_ref_index);
606 if (tag == JVM_CONSTANT_Fieldref) {
607 if (_need_verify) {
608 // Field name and signature are verified above, when iterating NameAndType_info.
609 // Need only to be sure signature is non-zero length and the right type.
610 if (signature->utf8_length() == 0 ||
611 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
612 throwIllegalSignature("Field", name, signature, CHECK);
613 }
614 }
615 } else {
616 if (_need_verify) {
617 // Method name and signature are verified above, when iterating NameAndType_info.
618 // Need only to be sure signature is non-zero length and the right type.
619 if (signature->utf8_length() == 0 ||
620 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
621 throwIllegalSignature("Method", name, signature, CHECK);
622 }
623 }
624 // 4509014: If a class method name begins with '<', it must be "<init>"
625 const unsigned int name_len = name->utf8_length();
626 if (tag == JVM_CONSTANT_Methodref &&
627 name_len != 0 &&
628 name->byte_at(0) == '<' &&
629 name != vmSymbols::object_initializer_name()) {
630 classfile_parse_error(
631 "Bad method name at constant pool index %u in class file %s",
632 name_ref_index, CHECK);
633 }
634 }
635 break;
636 }
637 case JVM_CONSTANT_MethodHandle: {
638 const int ref_index = cp->method_handle_index_at(index);
639 const int ref_kind = cp->method_handle_ref_kind_at(index);
640 switch (ref_kind) {
641 case JVM_REF_invokeVirtual:
642 case JVM_REF_invokeStatic:
643 case JVM_REF_invokeSpecial:
644 case JVM_REF_newInvokeSpecial: {
645 const int name_and_type_ref_index =
646 cp->name_and_type_ref_index_at(ref_index);
647 const int name_ref_index =
648 cp->name_ref_index_at(name_and_type_ref_index);
649 const Symbol* const name = cp->symbol_at(name_ref_index);
650 if (ref_kind == JVM_REF_newInvokeSpecial) {
651 if (name != vmSymbols::object_initializer_name()) {
652 classfile_parse_error(
653 "Bad constructor name at constant pool index %u in class file %s",
654 name_ref_index, CHECK);
655 }
656 } else {
657 if (name == vmSymbols::object_initializer_name()) {
658 classfile_parse_error(
659 "Bad method name at constant pool index %u in class file %s",
660 name_ref_index, CHECK);
661 }
662 }
663 break;
664 }
665 // Other ref_kinds are already fully checked in previous pass.
666 } // switch(ref_kind)
667 break;
668 }
669 case JVM_CONSTANT_MethodType: {
670 const Symbol* const no_name = vmSymbols::type_name(); // place holder
671 const Symbol* const signature = cp->method_type_signature_at(index);
672 verify_legal_method_signature(no_name, signature, CHECK);
673 break;
674 }
675 case JVM_CONSTANT_Utf8: {
676 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
677 }
678 } // switch(tag)
679 } // end of for
680 }
681
682 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
683 int index,
684 Handle patch,
685 TRAPS) {
686 assert(cp != NULL, "invariant");
687
688 BasicType patch_type = T_VOID;
689
690 switch (cp->tag_at(index).value()) {
691
692 case JVM_CONSTANT_UnresolvedClass: {
693 // Patching a class means pre-resolving it.
694 // The name in the constant pool is ignored.
695 if (java_lang_Class::is_instance(patch())) {
696 guarantee_property(!java_lang_Class::is_primitive(patch()),
697 "Illegal class patch at %d in class file %s",
698 index, CHECK);
699 cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
700 } else {
701 guarantee_property(java_lang_String::is_instance(patch()),
702 "Illegal class patch at %d in class file %s",
703 index, CHECK);
704 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
705 cp->unresolved_klass_at_put(index, name);
706 }
707 break;
708 }
709
710 case JVM_CONSTANT_String: {
711 // skip this patch and don't clear it. Needs the oop array for resolved
712 // references to be created first.
713 return;
714 }
715 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
716 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
717 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
718 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
719 patch_prim:
720 {
721 jvalue value;
722 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
723 guarantee_property(value_type == patch_type,
724 "Illegal primitive patch at %d in class file %s",
725 index, CHECK);
726 switch (value_type) {
727 case T_INT: cp->int_at_put(index, value.i); break;
728 case T_FLOAT: cp->float_at_put(index, value.f); break;
729 case T_LONG: cp->long_at_put(index, value.j); break;
730 case T_DOUBLE: cp->double_at_put(index, value.d); break;
731 default: assert(false, "");
732 }
733 } // end patch_prim label
734 break;
735
736 default: {
737 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
738 guarantee_property(!has_cp_patch_at(index),
739 "Illegal unexpected patch at %d in class file %s",
740 index, CHECK);
741 return;
742 }
743 } // end of switch(tag)
744
745 // On fall-through, mark the patch as used.
746 clear_cp_patch_at(index);
747 }
748 class NameSigHash: public ResourceObj {
749 public:
750 const Symbol* _name; // name
751 const Symbol* _sig; // signature
752 NameSigHash* _next; // Next entry in hash table
753 };
754
755 static const int HASH_ROW_SIZE = 256;
756
757 static unsigned int hash(const Symbol* name, const Symbol* sig) {
758 unsigned int raw_hash = 0;
759 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
760 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
761
762 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
763 }
764
765
766 static void initialize_hashtable(NameSigHash** table) {
767 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
768 }
769 // Return false if the name/sig combination is found in table.
770 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
771 // The old format checker uses heap sort to find duplicates.
772 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
773 // of table since we don't expect Symbol*'s to move.
774 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
775 assert(name != NULL, "name in constant pool is NULL");
776
777 // First lookup for duplicates
778 int index = hash(name, sig);
779 NameSigHash* entry = table[index];
780 while (entry != NULL) {
781 if (entry->_name == name && entry->_sig == sig) {
782 return false;
783 }
784 entry = entry->_next;
785 }
786
787 // No duplicate is found, allocate a new entry and fill it.
788 entry = new NameSigHash();
789 entry->_name = name;
790 entry->_sig = sig;
791
792 // Insert into hash table
793 entry->_next = table[index];
794 table[index] = entry;
795
796 return true;
797 }
798
799 // Side-effects: populates the _local_interfaces field
800 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
801 const int itfs_len,
802 ConstantPool* const cp,
803 bool* const has_nonstatic_concrete_methods,
804 TRAPS) {
805 assert(stream != NULL, "invariant");
806 assert(cp != NULL, "invariant");
807 assert(has_nonstatic_concrete_methods != NULL, "invariant");
808
809 if (itfs_len == 0) {
810 _local_interfaces = Universe::the_empty_klass_array();
811 } else {
812 assert(itfs_len > 0, "only called for len>0");
813 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
814
815 int index;
816 for (index = 0; index < itfs_len; index++) {
817 const u2 interface_index = stream->get_u2(CHECK);
818 KlassHandle interf;
819 check_property(
820 valid_klass_reference_at(interface_index),
821 "Interface name has bad constant pool index %u in class file %s",
822 interface_index, CHECK);
823 if (cp->tag_at(interface_index).is_klass()) {
824 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
825 } else {
826 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
827
828 // Don't need to check legal name because it's checked when parsing constant pool.
829 // But need to make sure it's not an array type.
830 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
831 "Bad interface name in class file %s", CHECK);
832
833 // Call resolve_super so classcircularity is checked
834 const Klass* const k =
835 SystemDictionary::resolve_super_or_fail(_class_name,
836 unresolved_klass,
837 _loader_data->class_loader(),
838 _protection_domain,
839 false,
840 CHECK);
841 interf = KlassHandle(THREAD, k);
842 }
843
844 if (!interf()->is_interface()) {
845 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
846 "Implementing class");
847 }
848
849 if (InstanceKlass::cast(interf())->has_nonstatic_concrete_methods()) {
850 *has_nonstatic_concrete_methods = true;
851 }
852 _local_interfaces->at_put(index, interf());
853 }
854
855 if (!_need_verify || itfs_len <= 1) {
856 return;
857 }
858
859 // Check if there's any duplicates in interfaces
860 ResourceMark rm(THREAD);
861 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
862 NameSigHash*,
863 HASH_ROW_SIZE);
864 initialize_hashtable(interface_names);
865 bool dup = false;
866 {
867 debug_only(NoSafepointVerifier nsv;)
868 for (index = 0; index < itfs_len; index++) {
869 const Klass* const k = _local_interfaces->at(index);
870 const Symbol* const name = InstanceKlass::cast(k)->name();
871 // If no duplicates, add (name, NULL) in hashtable interface_names.
872 if (!put_after_lookup(name, NULL, interface_names)) {
873 dup = true;
874 break;
875 }
876 }
877 }
878 if (dup) {
879 classfile_parse_error("Duplicate interface name in class file %s", CHECK);
880 }
881 }
882 }
883
884 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
885 int constantvalue_index,
886 int signature_index,
887 TRAPS) const {
888 // Make sure the constant pool entry is of a type appropriate to this field
889 guarantee_property(
890 (constantvalue_index > 0 &&
891 constantvalue_index < cp->length()),
892 "Bad initial value index %u in ConstantValue attribute in class file %s",
893 constantvalue_index, CHECK);
894
895 const constantTag value_type = cp->tag_at(constantvalue_index);
896 switch(cp->basic_type_for_signature_at(signature_index)) {
897 case T_LONG: {
898 guarantee_property(value_type.is_long(),
899 "Inconsistent constant value type in class file %s",
900 CHECK);
901 break;
902 }
903 case T_FLOAT: {
904 guarantee_property(value_type.is_float(),
905 "Inconsistent constant value type in class file %s",
906 CHECK);
907 break;
908 }
909 case T_DOUBLE: {
910 guarantee_property(value_type.is_double(),
911 "Inconsistent constant value type in class file %s",
912 CHECK);
913 break;
914 }
915 case T_BYTE:
916 case T_CHAR:
917 case T_SHORT:
918 case T_BOOLEAN:
919 case T_INT: {
920 guarantee_property(value_type.is_int(),
921 "Inconsistent constant value type in class file %s",
922 CHECK);
923 break;
924 }
925 case T_OBJECT: {
926 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
927 && value_type.is_string()),
928 "Bad string initial value in class file %s",
929 CHECK);
930 break;
931 }
932 default: {
933 classfile_parse_error("Unable to set initial value %u in class file %s",
934 constantvalue_index,
935 CHECK);
936 }
937 }
938 }
939
940 class AnnotationCollector : public ResourceObj{
941 public:
942 enum Location { _in_field, _in_method, _in_class };
943 enum ID {
944 _unknown = 0,
945 _method_CallerSensitive,
946 _method_ForceInline,
947 _method_DontInline,
948 _method_InjectedProfile,
949 _method_LambdaForm_Compiled,
950 _method_LambdaForm_Hidden,
951 _method_HotSpotIntrinsicCandidate,
952 _jdk_internal_vm_annotation_Contended,
953 _field_Stable,
954 _jdk_internal_vm_annotation_ReservedStackAccess,
955 _annotation_LIMIT
956 };
957 const Location _location;
958 int _annotations_present;
959 u2 _contended_group;
960
961 AnnotationCollector(Location location)
962 : _location(location), _annotations_present(0)
963 {
964 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
965 }
966 // If this annotation name has an ID, report it (or _none).
967 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
968 // Set the annotation name:
969 void set_annotation(ID id) {
970 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
971 _annotations_present |= nth_bit((int)id);
972 }
973
974 void remove_annotation(ID id) {
975 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
976 _annotations_present &= ~nth_bit((int)id);
977 }
978
979 // Report if the annotation is present.
980 bool has_any_annotations() const { return _annotations_present != 0; }
981 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
982
983 void set_contended_group(u2 group) { _contended_group = group; }
984 u2 contended_group() const { return _contended_group; }
985
986 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
987
988 void set_stable(bool stable) { set_annotation(_field_Stable); }
989 bool is_stable() const { return has_annotation(_field_Stable); }
990 };
991
992 // This class also doubles as a holder for metadata cleanup.
993 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
994 private:
995 ClassLoaderData* _loader_data;
996 AnnotationArray* _field_annotations;
997 AnnotationArray* _field_type_annotations;
998 public:
999 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1000 AnnotationCollector(_in_field),
1001 _loader_data(loader_data),
1002 _field_annotations(NULL),
1003 _field_type_annotations(NULL) {}
1004 ~FieldAnnotationCollector();
1005 void apply_to(FieldInfo* f);
1006 AnnotationArray* field_annotations() { return _field_annotations; }
1007 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1008
1009 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1010 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1011 };
1012
1013 class MethodAnnotationCollector : public AnnotationCollector{
1014 public:
1015 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1016 void apply_to(methodHandle m);
1017 };
1018
1019 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1020 public:
1021 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1022 void apply_to(InstanceKlass* ik);
1023 };
1024
1025
1026 static int skip_annotation_value(const u1*, int, int); // fwd decl
1027
1028 // 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;
3056 // JVM_ACC_MODULE is defined in JDK-9 and later.
3057 if (_major_version >= JAVA_9_VERSION) {
3058 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3059 } else {
3060 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3061 }
3062 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3063 // Set abstract bit for old class files for backward compatibility
3064 flags |= JVM_ACC_ABSTRACT;
3065 }
3066 verify_legal_class_modifiers(flags, CHECK_0);
3067 AccessFlags inner_access_flags(flags);
3068
3069 inner_classes->at_put(index++, inner_class_info_index);
3070 inner_classes->at_put(index++, outer_class_info_index);
3071 inner_classes->at_put(index++, inner_name_index);
3072 inner_classes->at_put(index++, inner_access_flags.as_short());
3073 }
3074
3075 // 4347400: make sure there's no duplicate entry in the classes array
3076 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3077 for(int i = 0; i < length * 4; i += 4) {
3078 for(int j = i + 4; j < length * 4; j += 4) {
3079 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3080 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3081 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3082 inner_classes->at(i+3) != inner_classes->at(j+3)),
3083 "Duplicate entry in InnerClasses in class file %s",
3084 CHECK_0);
3085 }
3086 }
3087 }
3088
3089 // Set EnclosingMethod class and method indexes.
3090 if (parsed_enclosingmethod_attribute) {
3091 inner_classes->at_put(index++, enclosing_method_class_index);
3092 inner_classes->at_put(index++, enclosing_method_method_index);
3093 }
3094 assert(index == size, "wrong size");
3095
3096 // Restore buffer's current position.
3097 cfs->set_current(current_mark);
3098
3099 return length;
3100 }
3101
3102 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3103 set_class_synthetic_flag(true);
3104 }
3105
3106 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3107 assert(cfs != NULL, "invariant");
3108
3109 const u2 signature_index = cfs->get_u2(CHECK);
3110 check_property(
3111 valid_symbol_at(signature_index),
3112 "Invalid constant pool index %u in Signature attribute in class file %s",
3113 signature_index, CHECK);
3114 set_class_generic_signature_index(signature_index);
3115 }
3116
3117 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3118 ConstantPool* cp,
3119 u4 attribute_byte_length,
3120 TRAPS) {
3121 assert(cfs != NULL, "invariant");
3122 assert(cp != NULL, "invariant");
3123
3124 const u1* const current_start = cfs->current();
3125
3126 guarantee_property(attribute_byte_length >= sizeof(u2),
3127 "Invalid BootstrapMethods attribute length %u in class file %s",
3128 attribute_byte_length,
3129 CHECK);
3130
3131 cfs->guarantee_more(attribute_byte_length, CHECK);
3132
3133 const int attribute_array_length = cfs->get_u2_fast();
3134
3135 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3136 "Short length on BootstrapMethods in class file %s",
3137 CHECK);
3138
3139
3140 // The attribute contains a counted array of counted tuples of shorts,
3141 // represending bootstrap specifiers:
3142 // length*{bootstrap_method_index, argument_count*{argument_index}}
3143 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3144 // operand_count = number of shorts in attr, except for leading length
3145
3146 // The attribute is copied into a short[] array.
3147 // The array begins with a series of short[2] pairs, one for each tuple.
3148 const int index_size = (attribute_array_length * 2);
3149
3150 Array<u2>* const operands =
3151 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3152
3153 // Eagerly assign operands so they will be deallocated with the constant
3154 // pool if there is an error.
3155 cp->set_operands(operands);
3156
3157 int operand_fill_index = index_size;
3158 const int cp_size = cp->length();
3159
3160 for (int n = 0; n < attribute_array_length; n++) {
3161 // Store a 32-bit offset into the header of the operand array.
3162 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3163
3164 // Read a bootstrap specifier.
3165 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3166 const u2 bootstrap_method_index = cfs->get_u2_fast();
3167 const u2 argument_count = cfs->get_u2_fast();
3168 check_property(
3169 valid_cp_range(bootstrap_method_index, cp_size) &&
3170 cp->tag_at(bootstrap_method_index).is_method_handle(),
3171 "bootstrap_method_index %u has bad constant type in class file %s",
3172 bootstrap_method_index,
3173 CHECK);
3174
3175 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3176 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3177 CHECK);
3178
3179 operands->at_put(operand_fill_index++, bootstrap_method_index);
3180 operands->at_put(operand_fill_index++, argument_count);
3181
3182 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3183 for (int j = 0; j < argument_count; j++) {
3184 const u2 argument_index = cfs->get_u2_fast();
3185 check_property(
3186 valid_cp_range(argument_index, cp_size) &&
3187 cp->tag_at(argument_index).is_loadable_constant(),
3188 "argument_index %u has bad constant type in class file %s",
3189 argument_index,
3190 CHECK);
3191 operands->at_put(operand_fill_index++, argument_index);
3192 }
3193 }
3194 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3195 "Bad length on BootstrapMethods in class file %s",
3196 CHECK);
3197 }
3198
3199 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3200 ConstantPool* cp,
3201 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3202 TRAPS) {
3203 assert(cfs != NULL, "invariant");
3204 assert(cp != NULL, "invariant");
3205 assert(parsed_annotations != NULL, "invariant");
3206
3207 // Set inner classes attribute to default sentinel
3208 _inner_classes = Universe::the_empty_short_array();
3209 cfs->guarantee_more(2, CHECK); // attributes_count
3210 u2 attributes_count = cfs->get_u2_fast();
3211 bool parsed_sourcefile_attribute = false;
3212 bool parsed_innerclasses_attribute = false;
3213 bool parsed_enclosingmethod_attribute = false;
3214 bool parsed_bootstrap_methods_attribute = false;
3215 const u1* runtime_visible_annotations = NULL;
3216 int runtime_visible_annotations_length = 0;
3217 const u1* runtime_invisible_annotations = NULL;
3218 int runtime_invisible_annotations_length = 0;
3219 const u1* runtime_visible_type_annotations = NULL;
3220 int runtime_visible_type_annotations_length = 0;
3221 const u1* runtime_invisible_type_annotations = NULL;
3222 int runtime_invisible_type_annotations_length = 0;
3223 bool runtime_invisible_type_annotations_exists = false;
3224 bool runtime_invisible_annotations_exists = false;
3225 bool parsed_source_debug_ext_annotations_exist = false;
3226 const u1* inner_classes_attribute_start = NULL;
3227 u4 inner_classes_attribute_length = 0;
3228 u2 enclosing_method_class_index = 0;
3229 u2 enclosing_method_method_index = 0;
3230 // Iterate over attributes
3231 while (attributes_count--) {
3232 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3233 const u2 attribute_name_index = cfs->get_u2_fast();
3234 const u4 attribute_length = cfs->get_u4_fast();
3235 check_property(
3236 valid_symbol_at(attribute_name_index),
3237 "Attribute name has bad constant pool index %u in class file %s",
3238 attribute_name_index, CHECK);
3239 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3240 if (tag == vmSymbols::tag_source_file()) {
3241 // Check for SourceFile tag
3242 if (_need_verify) {
3243 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3244 }
3245 if (parsed_sourcefile_attribute) {
3246 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3247 } else {
3248 parsed_sourcefile_attribute = true;
3249 }
3250 parse_classfile_sourcefile_attribute(cfs, CHECK);
3251 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3252 // Check for SourceDebugExtension tag
3253 if (parsed_source_debug_ext_annotations_exist) {
3254 classfile_parse_error(
3255 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3256 }
3257 parsed_source_debug_ext_annotations_exist = true;
3258 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3259 } else if (tag == vmSymbols::tag_inner_classes()) {
3260 // Check for InnerClasses tag
3261 if (parsed_innerclasses_attribute) {
3262 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3263 } else {
3264 parsed_innerclasses_attribute = true;
3265 }
3266 inner_classes_attribute_start = cfs->get_u1_buffer();
3267 inner_classes_attribute_length = attribute_length;
3268 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3269 } else if (tag == vmSymbols::tag_synthetic()) {
3270 // Check for Synthetic tag
3271 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3272 if (attribute_length != 0) {
3273 classfile_parse_error(
3274 "Invalid Synthetic classfile attribute length %u in class file %s",
3275 attribute_length, CHECK);
3276 }
3277 parse_classfile_synthetic_attribute(CHECK);
3278 } else if (tag == vmSymbols::tag_deprecated()) {
3279 // Check for Deprecatd tag - 4276120
3280 if (attribute_length != 0) {
3281 classfile_parse_error(
3282 "Invalid Deprecated classfile attribute length %u in class file %s",
3283 attribute_length, CHECK);
3284 }
3285 } else if (_major_version >= JAVA_1_5_VERSION) {
3286 if (tag == vmSymbols::tag_signature()) {
3287 if (attribute_length != 2) {
3288 classfile_parse_error(
3289 "Wrong Signature attribute length %u in class file %s",
3290 attribute_length, CHECK);
3291 }
3292 parse_classfile_signature_attribute(cfs, CHECK);
3293 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3294 if (runtime_visible_annotations != NULL) {
3295 classfile_parse_error(
3296 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3297 }
3298 runtime_visible_annotations_length = attribute_length;
3299 runtime_visible_annotations = cfs->get_u1_buffer();
3300 assert(runtime_visible_annotations != NULL, "null visible annotations");
3301 cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3302 parse_annotations(cp,
3303 runtime_visible_annotations,
3304 runtime_visible_annotations_length,
3305 parsed_annotations,
3306 _loader_data,
3307 CHECK);
3308 cfs->skip_u1_fast(runtime_visible_annotations_length);
3309 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3310 if (runtime_invisible_annotations_exists) {
3311 classfile_parse_error(
3312 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3313 }
3314 runtime_invisible_annotations_exists = true;
3315 if (PreserveAllAnnotations) {
3316 runtime_invisible_annotations_length = attribute_length;
3317 runtime_invisible_annotations = cfs->get_u1_buffer();
3318 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3319 }
3320 cfs->skip_u1(attribute_length, CHECK);
3321 } else if (tag == vmSymbols::tag_enclosing_method()) {
3322 if (parsed_enclosingmethod_attribute) {
3323 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3324 } else {
3325 parsed_enclosingmethod_attribute = true;
3326 }
3327 guarantee_property(attribute_length == 4,
3328 "Wrong EnclosingMethod attribute length %u in class file %s",
3329 attribute_length, CHECK);
3330 cfs->guarantee_more(4, CHECK); // class_index, method_index
3331 enclosing_method_class_index = cfs->get_u2_fast();
3332 enclosing_method_method_index = cfs->get_u2_fast();
3333 if (enclosing_method_class_index == 0) {
3334 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3335 }
3336 // Validate the constant pool indices and types
3337 check_property(valid_klass_reference_at(enclosing_method_class_index),
3338 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3339 if (enclosing_method_method_index != 0 &&
3340 (!cp->is_within_bounds(enclosing_method_method_index) ||
3341 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3342 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3343 }
3344 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3345 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3346 if (parsed_bootstrap_methods_attribute) {
3347 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3348 }
3349 parsed_bootstrap_methods_attribute = true;
3350 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3351 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3352 if (runtime_visible_type_annotations != NULL) {
3353 classfile_parse_error(
3354 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3355 }
3356 runtime_visible_type_annotations_length = attribute_length;
3357 runtime_visible_type_annotations = cfs->get_u1_buffer();
3358 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3359 // No need for the VM to parse Type annotations
3360 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3361 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3362 if (runtime_invisible_type_annotations_exists) {
3363 classfile_parse_error(
3364 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3365 } else {
3366 runtime_invisible_type_annotations_exists = true;
3367 }
3368 if (PreserveAllAnnotations) {
3369 runtime_invisible_type_annotations_length = attribute_length;
3370 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3371 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3372 }
3373 cfs->skip_u1(attribute_length, CHECK);
3374 } else {
3375 // Unknown attribute
3376 cfs->skip_u1(attribute_length, CHECK);
3377 }
3378 } else {
3379 // Unknown attribute
3380 cfs->skip_u1(attribute_length, CHECK);
3381 }
3382 }
3383 _annotations = assemble_annotations(runtime_visible_annotations,
3384 runtime_visible_annotations_length,
3385 runtime_invisible_annotations,
3386 runtime_invisible_annotations_length,
3387 CHECK);
3388 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3389 runtime_visible_type_annotations_length,
3390 runtime_invisible_type_annotations,
3391 runtime_invisible_type_annotations_length,
3392 CHECK);
3393
3394 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3395 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3396 cfs,
3397 inner_classes_attribute_start,
3398 parsed_innerclasses_attribute,
3399 enclosing_method_class_index,
3400 enclosing_method_method_index,
3401 CHECK);
3402 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3403 guarantee_property(
3404 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3405 "Wrong InnerClasses attribute length in class file %s", CHECK);
3406 }
3407 }
3408
3409 if (_max_bootstrap_specifier_index >= 0) {
3410 guarantee_property(parsed_bootstrap_methods_attribute,
3411 "Missing BootstrapMethods attribute in class file %s", CHECK);
3412 }
3413 }
3414
3415 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3416 assert(k != NULL, "invariant");
3417
3418 if (_synthetic_flag)
3419 k->set_is_synthetic();
3420 if (_sourcefile_index != 0) {
3421 k->set_source_file_name_index(_sourcefile_index);
3422 }
3423 if (_generic_signature_index != 0) {
3424 k->set_generic_signature_index(_generic_signature_index);
3425 }
3426 if (_sde_buffer != NULL) {
3427 k->set_source_debug_extension(_sde_buffer, _sde_length);
3428 }
3429 }
3430
3431 // Create the Annotations object that will
3432 // hold the annotations array for the Klass.
3433 void ClassFileParser::create_combined_annotations(TRAPS) {
3434 if (_annotations == NULL &&
3435 _type_annotations == NULL &&
3436 _fields_annotations == NULL &&
3437 _fields_type_annotations == NULL) {
3438 // Don't create the Annotations object unnecessarily.
3439 return;
3440 }
3441
3442 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3443 annotations->set_class_annotations(_annotations);
3444 annotations->set_class_type_annotations(_type_annotations);
3445 annotations->set_fields_annotations(_fields_annotations);
3446 annotations->set_fields_type_annotations(_fields_type_annotations);
3447
3448 // This is the Annotations object that will be
3449 // assigned to InstanceKlass being constructed.
3450 _combined_annotations = annotations;
3451
3452 // The annotations arrays below has been transfered the
3453 // _combined_annotations so these fields can now be cleared.
3454 _annotations = NULL;
3455 _type_annotations = NULL;
3456 _fields_annotations = NULL;
3457 _fields_type_annotations = NULL;
3458 }
3459
3460 // Transfer ownership of metadata allocated to the InstanceKlass.
3461 void ClassFileParser::apply_parsed_class_metadata(
3462 InstanceKlass* this_klass,
3463 int java_fields_count, TRAPS) {
3464 assert(this_klass != NULL, "invariant");
3465
3466 _cp->set_pool_holder(this_klass);
3467 this_klass->set_constants(_cp);
3468 this_klass->set_fields(_fields, java_fields_count);
3469 this_klass->set_methods(_methods);
3470 this_klass->set_inner_classes(_inner_classes);
3471 this_klass->set_local_interfaces(_local_interfaces);
3472 this_klass->set_transitive_interfaces(_transitive_interfaces);
3473 this_klass->set_annotations(_combined_annotations);
3474
3475 // Clear out these fields so they don't get deallocated by the destructor
3476 clear_class_metadata();
3477 }
3478
3479 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3480 int runtime_visible_annotations_length,
3481 const u1* const runtime_invisible_annotations,
3482 int runtime_invisible_annotations_length,
3483 TRAPS) {
3484 AnnotationArray* annotations = NULL;
3485 if (runtime_visible_annotations != NULL ||
3486 runtime_invisible_annotations != NULL) {
3487 annotations = MetadataFactory::new_array<u1>(_loader_data,
3488 runtime_visible_annotations_length +
3489 runtime_invisible_annotations_length,
3490 CHECK_(annotations));
3491 if (runtime_visible_annotations != NULL) {
3492 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3493 annotations->at_put(i, runtime_visible_annotations[i]);
3494 }
3495 }
3496 if (runtime_invisible_annotations != NULL) {
3497 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3498 int append = runtime_visible_annotations_length+i;
3499 annotations->at_put(append, runtime_invisible_annotations[i]);
3500 }
3501 }
3502 }
3503 return annotations;
3504 }
3505
3506 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3507 const int super_class_index,
3508 const bool need_verify,
3509 TRAPS) {
3510 assert(cp != NULL, "invariant");
3511 const InstanceKlass* super_klass = NULL;
3512
3513 if (super_class_index == 0) {
3514 check_property(_class_name == vmSymbols::java_lang_Object(),
3515 "Invalid superclass index %u in class file %s",
3516 super_class_index,
3517 CHECK_NULL);
3518 } else {
3519 check_property(valid_klass_reference_at(super_class_index),
3520 "Invalid superclass index %u in class file %s",
3521 super_class_index,
3522 CHECK_NULL);
3523 // The class name should be legal because it is checked when parsing constant pool.
3524 // However, make sure it is not an array type.
3525 bool is_array = false;
3526 if (cp->tag_at(super_class_index).is_klass()) {
3527 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3528 if (need_verify)
3529 is_array = super_klass->is_array_klass();
3530 } else if (need_verify) {
3531 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3532 }
3533 if (need_verify) {
3534 guarantee_property(!is_array,
3535 "Bad superclass name in class file %s", CHECK_NULL);
3536 }
3537 }
3538 return super_klass;
3539 }
3540
3541 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3542 unsigned int nonstatic_oop_map_count,
3543 int first_nonstatic_oop_offset) {
3544
3545 unsigned int map_count =
3546 NULL == super ? 0 : super->nonstatic_oop_map_count();
3547 if (nonstatic_oop_map_count > 0) {
3548 // We have oops to add to map
3549 if (map_count == 0) {
3550 map_count = nonstatic_oop_map_count;
3551 }
3552 else {
3553 // Check whether we should add a new map block or whether the last one can
3554 // be extended
3555 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3556 const OopMapBlock* const last_map = first_map + map_count - 1;
3557
3558 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3559 if (next_offset == first_nonstatic_oop_offset) {
3560 // There is no gap bettwen superklass's last oop field and first
3561 // local oop field, merge maps.
3562 nonstatic_oop_map_count -= 1;
3563 }
3564 else {
3565 // Superklass didn't end with a oop field, add extra maps
3566 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3567 }
3568 map_count += nonstatic_oop_map_count;
3569 }
3570 }
3571 return map_count;
3572 }
3573
3574 #ifndef PRODUCT
3575 static void print_field_layout(const Symbol* name,
3576 Array<u2>* fields,
3577 constantPoolHandle cp,
3578 int instance_size,
3579 int instance_fields_start,
3580 int instance_fields_end,
3581 int static_fields_end) {
3582
3583 assert(name != NULL, "invariant");
3584
3585 tty->print("%s: field layout\n", name->as_klass_external_name());
3586 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3587 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3588 if (!fs.access_flags().is_static()) {
3589 tty->print(" @%3d \"%s\" %s\n",
3590 fs.offset(),
3591 fs.name()->as_klass_external_name(),
3592 fs.signature()->as_klass_external_name());
3593 }
3594 }
3595 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3596 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3597 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3598 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3599 if (fs.access_flags().is_static()) {
3600 tty->print(" @%3d \"%s\" %s\n",
3601 fs.offset(),
3602 fs.name()->as_klass_external_name(),
3603 fs.signature()->as_klass_external_name());
3604 }
3605 }
3606 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3607 tty->print("\n");
3608 }
3609 #endif
3610
3611 // Values needed for oopmap and InstanceKlass creation
3612 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3613 public:
3614 int* nonstatic_oop_offsets;
3615 unsigned int* nonstatic_oop_counts;
3616 unsigned int nonstatic_oop_map_count;
3617 unsigned int total_oop_map_count;
3618 int instance_size;
3619 int nonstatic_field_size;
3620 int static_field_size;
3621 bool has_nonstatic_fields;
3622 };
3623
3624 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3625 void ClassFileParser::layout_fields(ConstantPool* cp,
3626 const FieldAllocationCount* fac,
3627 const ClassAnnotationCollector* parsed_annotations,
3628 FieldLayoutInfo* info,
3629 TRAPS) {
3630
3631 assert(cp != NULL, "invariant");
3632
3633 // Field size and offset computation
3634 int nonstatic_field_size = _super_klass == NULL ? 0 :
3635 _super_klass->nonstatic_field_size();
3636
3637 // Count the contended fields by type.
3638 //
3639 // We ignore static fields, because @Contended is not supported for them.
3640 // The layout code below will also ignore the static fields.
3641 int nonstatic_contended_count = 0;
3642 FieldAllocationCount fac_contended;
3643 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3644 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3645 if (fs.is_contended()) {
3646 fac_contended.count[atype]++;
3647 if (!fs.access_flags().is_static()) {
3648 nonstatic_contended_count++;
3649 }
3650 }
3651 }
3652
3653
3654 // Calculate the starting byte offsets
3655 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3656 int next_static_double_offset = next_static_oop_offset +
3657 ((fac->count[STATIC_OOP]) * heapOopSize);
3658 if ( fac->count[STATIC_DOUBLE] &&
3659 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3660 Universe::field_type_should_be_aligned(T_LONG)) ) {
3661 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3662 }
3663
3664 int next_static_word_offset = next_static_double_offset +
3665 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3666 int next_static_short_offset = next_static_word_offset +
3667 ((fac->count[STATIC_WORD]) * BytesPerInt);
3668 int next_static_byte_offset = next_static_short_offset +
3669 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3670
3671 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3672 nonstatic_field_size * heapOopSize;
3673
3674 int next_nonstatic_field_offset = nonstatic_fields_start;
3675
3676 const bool is_contended_class = parsed_annotations->is_contended();
3677
3678 // Class is contended, pad before all the fields
3679 if (is_contended_class) {
3680 next_nonstatic_field_offset += ContendedPaddingWidth;
3681 }
3682
3683 // Compute the non-contended fields count.
3684 // The packing code below relies on these counts to determine if some field
3685 // can be squeezed into the alignment gap. Contended fields are obviously
3686 // exempt from that.
3687 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3688 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3689 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3690 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3691 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3692
3693 // Total non-static fields count, including every contended field
3694 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3695 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3696 fac->count[NONSTATIC_OOP];
3697
3698 const bool super_has_nonstatic_fields =
3699 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3700 const bool has_nonstatic_fields =
3701 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3702
3703
3704 // Prepare list of oops for oop map generation.
3705 //
3706 // "offset" and "count" lists are describing the set of contiguous oop
3707 // regions. offset[i] is the start of the i-th region, which then has
3708 // count[i] oops following. Before we know how many regions are required,
3709 // we pessimistically allocate the maps to fit all the oops into the
3710 // distinct regions.
3711 //
3712 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3713 // to figure out if we still need to do this.
3714 unsigned int nonstatic_oop_map_count = 0;
3715 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3716
3717 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3718 THREAD, int, max_nonstatic_oop_maps);
3719 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3720 THREAD, unsigned int, max_nonstatic_oop_maps);
3721
3722 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3723
3724 bool compact_fields = CompactFields;
3725 int allocation_style = FieldsAllocationStyle;
3726 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3727 assert(false, "0 <= FieldsAllocationStyle <= 2");
3728 allocation_style = 1; // Optimistic
3729 }
3730
3731 // The next classes have predefined hard-coded fields offsets
3732 // (see in JavaClasses::compute_hard_coded_offsets()).
3733 // Use default fields allocation order for them.
3734 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3735 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3736 _class_name == vmSymbols::java_lang_Class() ||
3737 _class_name == vmSymbols::java_lang_ClassLoader() ||
3738 _class_name == vmSymbols::java_lang_ref_Reference() ||
3739 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3740 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3741 _class_name == vmSymbols::java_lang_String() ||
3742 _class_name == vmSymbols::java_lang_Throwable() ||
3743 _class_name == vmSymbols::java_lang_Boolean() ||
3744 _class_name == vmSymbols::java_lang_Character() ||
3745 _class_name == vmSymbols::java_lang_Float() ||
3746 _class_name == vmSymbols::java_lang_Double() ||
3747 _class_name == vmSymbols::java_lang_Byte() ||
3748 _class_name == vmSymbols::java_lang_Short() ||
3749 _class_name == vmSymbols::java_lang_Integer() ||
3750 _class_name == vmSymbols::java_lang_Long())) {
3751 allocation_style = 0; // Allocate oops first
3752 compact_fields = false; // Don't compact fields
3753 }
3754
3755 int next_nonstatic_oop_offset = 0;
3756 int next_nonstatic_double_offset = 0;
3757
3758 // Rearrange fields for a given allocation style
3759 if( allocation_style == 0 ) {
3760 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3761 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3762 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3763 (nonstatic_oop_count * heapOopSize);
3764 } else if( allocation_style == 1 ) {
3765 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3766 next_nonstatic_double_offset = next_nonstatic_field_offset;
3767 } else if( allocation_style == 2 ) {
3768 // Fields allocation: oops fields in super and sub classes are together.
3769 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3770 _super_klass->nonstatic_oop_map_size() > 0 ) {
3771 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3772 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3773 const OopMapBlock* const last_map = first_map + map_count - 1;
3774 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3775 if (next_offset == next_nonstatic_field_offset) {
3776 allocation_style = 0; // allocate oops first
3777 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3778 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3779 (nonstatic_oop_count * heapOopSize);
3780 }
3781 }
3782 if( allocation_style == 2 ) {
3783 allocation_style = 1; // allocate oops last
3784 next_nonstatic_double_offset = next_nonstatic_field_offset;
3785 }
3786 } else {
3787 ShouldNotReachHere();
3788 }
3789
3790 int nonstatic_oop_space_count = 0;
3791 int nonstatic_word_space_count = 0;
3792 int nonstatic_short_space_count = 0;
3793 int nonstatic_byte_space_count = 0;
3794 int nonstatic_oop_space_offset = 0;
3795 int nonstatic_word_space_offset = 0;
3796 int nonstatic_short_space_offset = 0;
3797 int nonstatic_byte_space_offset = 0;
3798
3799 // Try to squeeze some of the fields into the gaps due to
3800 // long/double alignment.
3801 if (nonstatic_double_count > 0) {
3802 int offset = next_nonstatic_double_offset;
3803 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3804 if (compact_fields && offset != next_nonstatic_double_offset) {
3805 // Allocate available fields into the gap before double field.
3806 int length = next_nonstatic_double_offset - offset;
3807 assert(length == BytesPerInt, "");
3808 nonstatic_word_space_offset = offset;
3809 if (nonstatic_word_count > 0) {
3810 nonstatic_word_count -= 1;
3811 nonstatic_word_space_count = 1; // Only one will fit
3812 length -= BytesPerInt;
3813 offset += BytesPerInt;
3814 }
3815 nonstatic_short_space_offset = offset;
3816 while (length >= BytesPerShort && nonstatic_short_count > 0) {
3817 nonstatic_short_count -= 1;
3818 nonstatic_short_space_count += 1;
3819 length -= BytesPerShort;
3820 offset += BytesPerShort;
3821 }
3822 nonstatic_byte_space_offset = offset;
3823 while (length > 0 && nonstatic_byte_count > 0) {
3824 nonstatic_byte_count -= 1;
3825 nonstatic_byte_space_count += 1;
3826 length -= 1;
3827 }
3828 // Allocate oop field in the gap if there are no other fields for that.
3829 nonstatic_oop_space_offset = offset;
3830 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3831 allocation_style != 0) { // when oop fields not first
3832 nonstatic_oop_count -= 1;
3833 nonstatic_oop_space_count = 1; // Only one will fit
3834 length -= heapOopSize;
3835 offset += heapOopSize;
3836 }
3837 }
3838 }
3839
3840 int next_nonstatic_word_offset = next_nonstatic_double_offset +
3841 (nonstatic_double_count * BytesPerLong);
3842 int next_nonstatic_short_offset = next_nonstatic_word_offset +
3843 (nonstatic_word_count * BytesPerInt);
3844 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3845 (nonstatic_short_count * BytesPerShort);
3846 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3847 nonstatic_byte_count;
3848
3849 // let oops jump before padding with this allocation style
3850 if( allocation_style == 1 ) {
3851 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3852 if( nonstatic_oop_count > 0 ) {
3853 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3854 }
3855 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3856 }
3857
3858 // Iterate over fields again and compute correct offsets.
3859 // The field allocation type was temporarily stored in the offset slot.
3860 // oop fields are located before non-oop fields (static and non-static).
3861 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3862
3863 // skip already laid out fields
3864 if (fs.is_offset_set()) continue;
3865
3866 // contended instance fields are handled below
3867 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3868
3869 int real_offset = 0;
3870 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3871
3872 // pack the rest of the fields
3873 switch (atype) {
3874 case STATIC_OOP:
3875 real_offset = next_static_oop_offset;
3876 next_static_oop_offset += heapOopSize;
3877 break;
3878 case STATIC_BYTE:
3879 real_offset = next_static_byte_offset;
3880 next_static_byte_offset += 1;
3881 break;
3882 case STATIC_SHORT:
3883 real_offset = next_static_short_offset;
3884 next_static_short_offset += BytesPerShort;
3885 break;
3886 case STATIC_WORD:
3887 real_offset = next_static_word_offset;
3888 next_static_word_offset += BytesPerInt;
3889 break;
3890 case STATIC_DOUBLE:
3891 real_offset = next_static_double_offset;
3892 next_static_double_offset += BytesPerLong;
3893 break;
3894 case NONSTATIC_OOP:
3895 if( nonstatic_oop_space_count > 0 ) {
3896 real_offset = nonstatic_oop_space_offset;
3897 nonstatic_oop_space_offset += heapOopSize;
3898 nonstatic_oop_space_count -= 1;
3899 } else {
3900 real_offset = next_nonstatic_oop_offset;
3901 next_nonstatic_oop_offset += heapOopSize;
3902 }
3903
3904 // Record this oop in the oop maps
3905 if( nonstatic_oop_map_count > 0 &&
3906 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3907 real_offset -
3908 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3909 heapOopSize ) {
3910 // This oop is adjacent to the previous one, add to current oop map
3911 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3912 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3913 } else {
3914 // This oop is not adjacent to the previous one, create new oop map
3915 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3916 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3917 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3918 nonstatic_oop_map_count += 1;
3919 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3920 first_nonstatic_oop_offset = real_offset;
3921 }
3922 }
3923 break;
3924 case NONSTATIC_BYTE:
3925 if( nonstatic_byte_space_count > 0 ) {
3926 real_offset = nonstatic_byte_space_offset;
3927 nonstatic_byte_space_offset += 1;
3928 nonstatic_byte_space_count -= 1;
3929 } else {
3930 real_offset = next_nonstatic_byte_offset;
3931 next_nonstatic_byte_offset += 1;
3932 }
3933 break;
3934 case NONSTATIC_SHORT:
3935 if( nonstatic_short_space_count > 0 ) {
3936 real_offset = nonstatic_short_space_offset;
3937 nonstatic_short_space_offset += BytesPerShort;
3938 nonstatic_short_space_count -= 1;
3939 } else {
3940 real_offset = next_nonstatic_short_offset;
3941 next_nonstatic_short_offset += BytesPerShort;
3942 }
3943 break;
3944 case NONSTATIC_WORD:
3945 if( nonstatic_word_space_count > 0 ) {
3946 real_offset = nonstatic_word_space_offset;
3947 nonstatic_word_space_offset += BytesPerInt;
3948 nonstatic_word_space_count -= 1;
3949 } else {
3950 real_offset = next_nonstatic_word_offset;
3951 next_nonstatic_word_offset += BytesPerInt;
3952 }
3953 break;
3954 case NONSTATIC_DOUBLE:
3955 real_offset = next_nonstatic_double_offset;
3956 next_nonstatic_double_offset += BytesPerLong;
3957 break;
3958 default:
3959 ShouldNotReachHere();
3960 }
3961 fs.set_offset(real_offset);
3962 }
3963
3964
3965 // Handle the contended cases.
3966 //
3967 // Each contended field should not intersect the cache line with another contended field.
3968 // In the absence of alignment information, we end up with pessimistically separating
3969 // the fields with full-width padding.
3970 //
3971 // Additionally, this should not break alignment for the fields, so we round the alignment up
3972 // for each field.
3973 if (nonstatic_contended_count > 0) {
3974
3975 // if there is at least one contended field, we need to have pre-padding for them
3976 next_nonstatic_padded_offset += ContendedPaddingWidth;
3977
3978 // collect all contended groups
3979 ResourceBitMap bm(cp->size());
3980 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3981 // skip already laid out fields
3982 if (fs.is_offset_set()) continue;
3983
3984 if (fs.is_contended()) {
3985 bm.set_bit(fs.contended_group());
3986 }
3987 }
3988
3989 int current_group = -1;
3990 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3991
3992 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3993
3994 // skip already laid out fields
3995 if (fs.is_offset_set()) continue;
3996
3997 // skip non-contended fields and fields from different group
3998 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3999
4000 // handle statics below
4001 if (fs.access_flags().is_static()) continue;
4002
4003 int real_offset = 0;
4004 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4005
4006 switch (atype) {
4007 case NONSTATIC_BYTE:
4008 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
4009 real_offset = next_nonstatic_padded_offset;
4010 next_nonstatic_padded_offset += 1;
4011 break;
4012
4013 case NONSTATIC_SHORT:
4014 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
4015 real_offset = next_nonstatic_padded_offset;
4016 next_nonstatic_padded_offset += BytesPerShort;
4017 break;
4018
4019 case NONSTATIC_WORD:
4020 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4021 real_offset = next_nonstatic_padded_offset;
4022 next_nonstatic_padded_offset += BytesPerInt;
4023 break;
4024
4025 case NONSTATIC_DOUBLE:
4026 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4027 real_offset = next_nonstatic_padded_offset;
4028 next_nonstatic_padded_offset += BytesPerLong;
4029 break;
4030
4031 case NONSTATIC_OOP:
4032 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4033 real_offset = next_nonstatic_padded_offset;
4034 next_nonstatic_padded_offset += heapOopSize;
4035
4036 // Record this oop in the oop maps
4037 if( nonstatic_oop_map_count > 0 &&
4038 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4039 real_offset -
4040 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4041 heapOopSize ) {
4042 // This oop is adjacent to the previous one, add to current oop map
4043 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4044 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4045 } else {
4046 // This oop is not adjacent to the previous one, create new oop map
4047 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4048 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4049 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4050 nonstatic_oop_map_count += 1;
4051 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4052 first_nonstatic_oop_offset = real_offset;
4053 }
4054 }
4055 break;
4056
4057 default:
4058 ShouldNotReachHere();
4059 }
4060
4061 if (fs.contended_group() == 0) {
4062 // Contended group defines the equivalence class over the fields:
4063 // the fields within the same contended group are not inter-padded.
4064 // The only exception is default group, which does not incur the
4065 // equivalence, and so requires intra-padding.
4066 next_nonstatic_padded_offset += ContendedPaddingWidth;
4067 }
4068
4069 fs.set_offset(real_offset);
4070 } // for
4071
4072 // Start laying out the next group.
4073 // Note that this will effectively pad the last group in the back;
4074 // this is expected to alleviate memory contention effects for
4075 // subclass fields and/or adjacent object.
4076 // If this was the default group, the padding is already in place.
4077 if (current_group != 0) {
4078 next_nonstatic_padded_offset += ContendedPaddingWidth;
4079 }
4080 }
4081
4082 // handle static fields
4083 }
4084
4085 // Entire class is contended, pad in the back.
4086 // This helps to alleviate memory contention effects for subclass fields
4087 // and/or adjacent object.
4088 if (is_contended_class) {
4089 next_nonstatic_padded_offset += ContendedPaddingWidth;
4090 }
4091
4092 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4093
4094 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
4095 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4096 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
4097
4098 int static_field_size = (static_fields_end -
4099 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4100 nonstatic_field_size = nonstatic_field_size +
4101 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4102
4103 int instance_size = align_object_size(instance_end / wordSize);
4104
4105 assert(instance_size == align_object_size(align_size_up(
4106 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4107 wordSize) / wordSize), "consistent layout helper value");
4108
4109 // Invariant: nonstatic_field end/start should only change if there are
4110 // nonstatic fields in the class, or if the class is contended. We compare
4111 // against the non-aligned value, so that end alignment will not fail the
4112 // assert without actually having the fields.
4113 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4114 is_contended_class ||
4115 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4116
4117 // Number of non-static oop map blocks allocated at end of klass.
4118 const unsigned int total_oop_map_count =
4119 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4120 first_nonstatic_oop_offset);
4121
4122 #ifndef PRODUCT
4123 if (PrintFieldLayout) {
4124 print_field_layout(_class_name,
4125 _fields,
4126 cp,
4127 instance_size,
4128 nonstatic_fields_start,
4129 nonstatic_fields_end,
4130 static_fields_end);
4131 }
4132
4133 #endif
4134 // Pass back information needed for InstanceKlass creation
4135 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4136 info->nonstatic_oop_counts = nonstatic_oop_counts;
4137 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4138 info->total_oop_map_count = total_oop_map_count;
4139 info->instance_size = instance_size;
4140 info->static_field_size = static_field_size;
4141 info->nonstatic_field_size = nonstatic_field_size;
4142 info->has_nonstatic_fields = has_nonstatic_fields;
4143 }
4144
4145 static void fill_oop_maps(const InstanceKlass* k,
4146 unsigned int nonstatic_oop_map_count,
4147 const int* nonstatic_oop_offsets,
4148 const unsigned int* nonstatic_oop_counts) {
4149
4150 assert(k != NULL, "invariant");
4151
4152 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4153 const InstanceKlass* const super = k->superklass();
4154 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4155 if (super_count > 0) {
4156 // Copy maps from superklass
4157 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4158 for (unsigned int i = 0; i < super_count; ++i) {
4159 *this_oop_map++ = *super_oop_map++;
4160 }
4161 }
4162
4163 if (nonstatic_oop_map_count > 0) {
4164 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4165 // The counts differ because there is no gap between superklass's last oop
4166 // field and the first local oop field. Extend the last oop map copied
4167 // from the superklass instead of creating new one.
4168 nonstatic_oop_map_count--;
4169 nonstatic_oop_offsets++;
4170 this_oop_map--;
4171 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4172 this_oop_map++;
4173 }
4174
4175 // Add new map blocks, fill them
4176 while (nonstatic_oop_map_count-- > 0) {
4177 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4178 this_oop_map->set_count(*nonstatic_oop_counts++);
4179 this_oop_map++;
4180 }
4181 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4182 this_oop_map, "sanity");
4183 }
4184 }
4185
4186
4187 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4188 assert(ik != NULL, "invariant");
4189
4190 const Klass* const super = ik->super();
4191
4192 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4193 // in which case we don't have to register objects as finalizable
4194 if (!_has_empty_finalizer) {
4195 if (_has_finalizer ||
4196 (super != NULL && super->has_finalizer())) {
4197 ik->set_has_finalizer();
4198 }
4199 }
4200
4201 #ifdef ASSERT
4202 bool f = false;
4203 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4204 vmSymbols::void_method_signature());
4205 if (m != NULL && !m->is_empty_method()) {
4206 f = true;
4207 }
4208
4209 // Spec doesn't prevent agent from redefinition of empty finalizer.
4210 // Despite the fact that it's generally bad idea and redefined finalizer
4211 // will not work as expected we shouldn't abort vm in this case
4212 if (!ik->has_redefined_this_or_super()) {
4213 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4214 }
4215 #endif
4216
4217 // Check if this klass supports the java.lang.Cloneable interface
4218 if (SystemDictionary::Cloneable_klass_loaded()) {
4219 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4220 ik->set_is_cloneable();
4221 }
4222 }
4223
4224 // Check if this klass has a vanilla default constructor
4225 if (super == NULL) {
4226 // java.lang.Object has empty default constructor
4227 ik->set_has_vanilla_constructor();
4228 } else {
4229 if (super->has_vanilla_constructor() &&
4230 _has_vanilla_constructor) {
4231 ik->set_has_vanilla_constructor();
4232 }
4233 #ifdef ASSERT
4234 bool v = false;
4235 if (super->has_vanilla_constructor()) {
4236 const Method* const constructor =
4237 ik->find_method(vmSymbols::object_initializer_name(),
4238 vmSymbols::void_method_signature());
4239 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4240 v = true;
4241 }
4242 }
4243 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4244 #endif
4245 }
4246
4247 // If it cannot be fast-path allocated, set a bit in the layout helper.
4248 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4249 assert(ik->size_helper() > 0, "layout_helper is initialized");
4250 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4251 || ik->is_abstract() || ik->is_interface()
4252 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4253 || ik->size_helper() >= FastAllocateSizeLimit) {
4254 // Forbid fast-path allocation.
4255 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4256 ik->set_layout_helper(lh);
4257 }
4258 }
4259
4260 // Attach super classes and interface classes to class loader data
4261 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4262 TRAPS) {
4263 assert(defined_klass != NULL, "invariant");
4264
4265 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4266 if (defining_loader_data->is_the_null_class_loader_data()) {
4267 // Dependencies to null class loader data are implicit.
4268 return;
4269 } else {
4270 // add super class dependency
4271 Klass* const super = defined_klass->super();
4272 if (super != NULL) {
4273 defining_loader_data->record_dependency(super, CHECK);
4274 }
4275
4276 // add super interface dependencies
4277 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4278 if (local_interfaces != NULL) {
4279 const int length = local_interfaces->length();
4280 for (int i = 0; i < length; i++) {
4281 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4282 }
4283 }
4284 }
4285 }
4286
4287 // utility methods for appending an array with check for duplicates
4288
4289 static void append_interfaces(GrowableArray<Klass*>* result,
4290 const Array<Klass*>* const ifs) {
4291 // iterate over new interfaces
4292 for (int i = 0; i < ifs->length(); i++) {
4293 Klass* const e = ifs->at(i);
4294 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4295 // add new interface
4296 result->append_if_missing(e);
4297 }
4298 }
4299
4300 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4301 Array<Klass*>* local_ifs,
4302 ClassLoaderData* loader_data,
4303 TRAPS) {
4304 assert(local_ifs != NULL, "invariant");
4305 assert(loader_data != NULL, "invariant");
4306
4307 // Compute maximum size for transitive interfaces
4308 int max_transitive_size = 0;
4309 int super_size = 0;
4310 // Add superclass transitive interfaces size
4311 if (super != NULL) {
4312 super_size = super->transitive_interfaces()->length();
4313 max_transitive_size += super_size;
4314 }
4315 // Add local interfaces' super interfaces
4316 const int local_size = local_ifs->length();
4317 for (int i = 0; i < local_size; i++) {
4318 Klass* const l = local_ifs->at(i);
4319 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4320 }
4321 // Finally add local interfaces
4322 max_transitive_size += local_size;
4323 // Construct array
4324 if (max_transitive_size == 0) {
4325 // no interfaces, use canonicalized array
4326 return Universe::the_empty_klass_array();
4327 } else if (max_transitive_size == super_size) {
4328 // no new local interfaces added, share superklass' transitive interface array
4329 return super->transitive_interfaces();
4330 } else if (max_transitive_size == local_size) {
4331 // only local interfaces added, share local interface array
4332 return local_ifs;
4333 } else {
4334 ResourceMark rm;
4335 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4336
4337 // Copy down from superclass
4338 if (super != NULL) {
4339 append_interfaces(result, super->transitive_interfaces());
4340 }
4341
4342 // Copy down from local interfaces' superinterfaces
4343 for (int i = 0; i < local_size; i++) {
4344 Klass* const l = local_ifs->at(i);
4345 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4346 }
4347 // Finally add local interfaces
4348 append_interfaces(result, local_ifs);
4349
4350 // length will be less than the max_transitive_size if duplicates were removed
4351 const int length = result->length();
4352 assert(length <= max_transitive_size, "just checking");
4353 Array<Klass*>* const new_result =
4354 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4355 for (int i = 0; i < length; i++) {
4356 Klass* const e = result->at(i);
4357 assert(e != NULL, "just checking");
4358 new_result->at_put(i, e);
4359 }
4360 return new_result;
4361 }
4362 }
4363
4364 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4365 assert(this_klass != NULL, "invariant");
4366 const Klass* const super = this_klass->super();
4367 if (super != NULL) {
4368
4369 // If the loader is not the boot loader then throw an exception if its
4370 // superclass is in package jdk.internal.reflect and its loader is not a
4371 // special reflection class loader
4372 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4373 assert(super->is_instance_klass(), "super is not instance klass");
4374 PackageEntry* super_package = super->package();
4375 if (super_package != NULL &&
4376 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4377 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4378 ResourceMark rm(THREAD);
4379 Exceptions::fthrow(
4380 THREAD_AND_LOCATION,
4381 vmSymbols::java_lang_IllegalAccessError(),
4382 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4383 this_klass->external_name(),
4384 this_klass->class_loader_data()->loader_name(),
4385 super->external_name());
4386 return;
4387 }
4388 }
4389
4390 Reflection::VerifyClassAccessResults vca_result =
4391 Reflection::verify_class_access(this_klass, super, false);
4392 if (vca_result != Reflection::ACCESS_OK) {
4393 ResourceMark rm(THREAD);
4394 char* msg = Reflection::verify_class_access_msg(this_klass, super, vca_result);
4395 if (msg == NULL) {
4396 Exceptions::fthrow(
4397 THREAD_AND_LOCATION,
4398 vmSymbols::java_lang_IllegalAccessError(),
4399 "class %s cannot access its superclass %s",
4400 this_klass->external_name(),
4401 super->external_name());
4402 } else {
4403 // Add additional message content.
4404 Exceptions::fthrow(
4405 THREAD_AND_LOCATION,
4406 vmSymbols::java_lang_IllegalAccessError(),
4407 "superclass access check failed: %s",
4408 msg);
4409 }
4410 }
4411 }
4412 }
4413
4414
4415 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4416 assert(this_klass != NULL, "invariant");
4417 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4418 const int lng = local_interfaces->length();
4419 for (int i = lng - 1; i >= 0; i--) {
4420 Klass* const k = local_interfaces->at(i);
4421 assert (k != NULL && k->is_interface(), "invalid interface");
4422 Reflection::VerifyClassAccessResults vca_result =
4423 Reflection::verify_class_access(this_klass, k, false);
4424 if (vca_result != Reflection::ACCESS_OK) {
4425 ResourceMark rm(THREAD);
4426 char* msg = Reflection::verify_class_access_msg(this_klass, k, vca_result);
4427 if (msg == NULL) {
4428 Exceptions::fthrow(
4429 THREAD_AND_LOCATION,
4430 vmSymbols::java_lang_IllegalAccessError(),
4431 "class %s cannot access its superinterface %s",
4432 this_klass->external_name(),
4433 k->external_name());
4434 } else {
4435 // Add additional message content.
4436 Exceptions::fthrow(
4437 THREAD_AND_LOCATION,
4438 vmSymbols::java_lang_IllegalAccessError(),
4439 "superinterface check failed: %s",
4440 msg);
4441 }
4442 }
4443 }
4444 }
4445
4446
4447 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4448 assert(this_klass != NULL, "invariant");
4449 const Array<Method*>* const methods = this_klass->methods();
4450 const int num_methods = methods->length();
4451
4452 // go thru each method and check if it overrides a final method
4453 for (int index = 0; index < num_methods; index++) {
4454 const Method* const m = methods->at(index);
4455
4456 // skip private, static, and <init> methods
4457 if ((!m->is_private() && !m->is_static()) &&
4458 (m->name() != vmSymbols::object_initializer_name())) {
4459
4460 const Symbol* const name = m->name();
4461 const Symbol* const signature = m->signature();
4462 const Klass* k = this_klass->super();
4463 const Method* super_m = NULL;
4464 while (k != NULL) {
4465 // skip supers that don't have final methods.
4466 if (k->has_final_method()) {
4467 // lookup a matching method in the super class hierarchy
4468 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4469 if (super_m == NULL) {
4470 break; // didn't find any match; get out
4471 }
4472
4473 if (super_m->is_final() && !super_m->is_static() &&
4474 // matching method in super is final, and not static
4475 (Reflection::verify_field_access(this_klass,
4476 super_m->method_holder(),
4477 super_m->method_holder(),
4478 super_m->access_flags(), false))
4479 // this class can access super final method and therefore override
4480 ) {
4481 ResourceMark rm(THREAD);
4482 Exceptions::fthrow(
4483 THREAD_AND_LOCATION,
4484 vmSymbols::java_lang_VerifyError(),
4485 "class %s overrides final method %s.%s%s",
4486 this_klass->external_name(),
4487 super_m->method_holder()->external_name(),
4488 name->as_C_string(),
4489 signature->as_C_string()
4490 );
4491 return;
4492 }
4493
4494 // continue to look from super_m's holder's super.
4495 k = super_m->method_holder()->super();
4496 continue;
4497 }
4498
4499 k = k->super();
4500 }
4501 }
4502 }
4503 }
4504
4505
4506 // assumes that this_klass is an interface
4507 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4508 assert(this_klass != NULL, "invariant");
4509 assert(this_klass->is_interface(), "not an interface");
4510 const Array<Method*>* methods = this_klass->methods();
4511 const int num_methods = methods->length();
4512
4513 for (int index = 0; index < num_methods; index++) {
4514 const Method* const m = methods->at(index);
4515 // if m is static and not the init method, throw a verify error
4516 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4517 ResourceMark rm(THREAD);
4518 Exceptions::fthrow(
4519 THREAD_AND_LOCATION,
4520 vmSymbols::java_lang_VerifyError(),
4521 "Illegal static method %s in interface %s",
4522 m->name()->as_C_string(),
4523 this_klass->external_name()
4524 );
4525 return;
4526 }
4527 }
4528 }
4529
4530 // utility methods for format checking
4531
4532 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4533 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4534 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4535 if (is_module) {
4536 ResourceMark rm(THREAD);
4537 Exceptions::fthrow(
4538 THREAD_AND_LOCATION,
4539 vmSymbols::java_lang_NoClassDefFoundError(),
4540 "%s is not a class because access_flag ACC_MODULE is set",
4541 _class_name->as_C_string());
4542 return;
4543 }
4544
4545 if (!_need_verify) { return; }
4546
4547 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4548 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4549 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4550 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4551 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4552 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4553 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4554
4555 if ((is_abstract && is_final) ||
4556 (is_interface && !is_abstract) ||
4557 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4558 (!is_interface && major_gte_15 && is_annotation)) {
4559 ResourceMark rm(THREAD);
4560 Exceptions::fthrow(
4561 THREAD_AND_LOCATION,
4562 vmSymbols::java_lang_ClassFormatError(),
4563 "Illegal class modifiers in class %s: 0x%X",
4564 _class_name->as_C_string(), flags
4565 );
4566 return;
4567 }
4568 }
4569
4570 static bool has_illegal_visibility(jint flags) {
4571 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4572 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4573 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4574
4575 return ((is_public && is_protected) ||
4576 (is_public && is_private) ||
4577 (is_protected && is_private));
4578 }
4579
4580 static bool is_supported_version(u2 major, u2 minor){
4581 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4582 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4583 (major <= max_version) &&
4584 ((major != max_version) ||
4585 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4586 }
4587
4588 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4589 bool is_interface,
4590 TRAPS) const {
4591 if (!_need_verify) { return; }
4592
4593 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4594 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4595 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4596 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4597 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4598 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4599 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4600 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4601 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4602
4603 bool is_illegal = false;
4604
4605 if (is_interface) {
4606 if (!is_public || !is_static || !is_final || is_private ||
4607 is_protected || is_volatile || is_transient ||
4608 (major_gte_15 && is_enum)) {
4609 is_illegal = true;
4610 }
4611 } else { // not interface
4612 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4613 is_illegal = true;
4614 }
4615 }
4616
4617 if (is_illegal) {
4618 ResourceMark rm(THREAD);
4619 Exceptions::fthrow(
4620 THREAD_AND_LOCATION,
4621 vmSymbols::java_lang_ClassFormatError(),
4622 "Illegal field modifiers in class %s: 0x%X",
4623 _class_name->as_C_string(), flags);
4624 return;
4625 }
4626 }
4627
4628 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4629 bool is_interface,
4630 const Symbol* name,
4631 TRAPS) const {
4632 if (!_need_verify) { return; }
4633
4634 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4635 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4636 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4637 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4638 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4639 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4640 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4641 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4642 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4643 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4644 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4645 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4646 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4647
4648 bool is_illegal = false;
4649
4650 if (is_interface) {
4651 if (major_gte_8) {
4652 // Class file version is JAVA_8_VERSION or later Methods of
4653 // interfaces may set any of the flags except ACC_PROTECTED,
4654 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4655 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4656 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4657 (is_native || is_protected || is_final || is_synchronized) ||
4658 // If a specific method of a class or interface has its
4659 // ACC_ABSTRACT flag set, it must not have any of its
4660 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4661 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4662 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4663 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4664 (is_abstract && (is_private || is_static || is_strict))) {
4665 is_illegal = true;
4666 }
4667 } else if (major_gte_15) {
4668 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4669 if (!is_public || is_private || is_protected || is_static || is_final ||
4670 is_synchronized || is_native || !is_abstract || is_strict) {
4671 is_illegal = true;
4672 }
4673 } else {
4674 // Class file version is pre-JAVA_1_5_VERSION
4675 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4676 is_illegal = true;
4677 }
4678 }
4679 } else { // not interface
4680 if (has_illegal_visibility(flags)) {
4681 is_illegal = true;
4682 } else {
4683 if (is_initializer) {
4684 if (is_static || is_final || is_synchronized || is_native ||
4685 is_abstract || (major_gte_15 && is_bridge)) {
4686 is_illegal = true;
4687 }
4688 } else { // not initializer
4689 if (is_abstract) {
4690 if ((is_final || is_native || is_private || is_static ||
4691 (major_gte_15 && (is_synchronized || is_strict)))) {
4692 is_illegal = true;
4693 }
4694 }
4695 }
4696 }
4697 }
4698
4699 if (is_illegal) {
4700 ResourceMark rm(THREAD);
4701 Exceptions::fthrow(
4702 THREAD_AND_LOCATION,
4703 vmSymbols::java_lang_ClassFormatError(),
4704 "Method %s in class %s has illegal modifiers: 0x%X",
4705 name->as_C_string(), _class_name->as_C_string(), flags);
4706 return;
4707 }
4708 }
4709
4710 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4711 int length,
4712 TRAPS) const {
4713 assert(_need_verify, "only called when _need_verify is true");
4714 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4715 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4716 }
4717 }
4718
4719 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4720 // In class names, '/' separates unqualified names. This is verified in this function also.
4721 // Method names also may not contain the characters '<' or '>', unless <init>
4722 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4723 // method. Because these names have been checked as special cases before
4724 // calling this method in verify_legal_method_name.
4725 //
4726 // This method is also called from the modular system APIs in modules.cpp
4727 // to verify the validity of module and package names.
4728 bool ClassFileParser::verify_unqualified_name(const char* name,
4729 unsigned int length,
4730 int type) {
4731 for (const char* p = name; p != name + length;) {
4732 jchar ch = *p;
4733 if (ch < 128) {
4734 if (ch == '.' || ch == ';' || ch == '[' ) {
4735 return false; // do not permit '.', ';', or '['
4736 }
4737 if (ch == '/') {
4738 // check for '//' or leading or trailing '/' which are not legal
4739 // unqualified name must not be empty
4740 if (type == ClassFileParser::LegalClass) {
4741 if (p == name || p+1 >= name+length || *(p+1) == '/') {
4742 return false;
4743 }
4744 } else {
4745 return false; // do not permit '/' unless it's class name
4746 }
4747 }
4748 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
4749 return false; // do not permit '<' or '>' in method names
4750 }
4751 p++;
4752 } else {
4753 char* tmp_p = UTF8::next(p, &ch);
4754 p = tmp_p;
4755 }
4756 }
4757 return true;
4758 }
4759
4760 // Take pointer to a string. Skip over the longest part of the string that could
4761 // be taken as a fieldname. Allow '/' if slash_ok is true.
4762 // Return a pointer to just past the fieldname.
4763 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4764 // being true, we saw consecutive slashes (meaning we were looking for a
4765 // qualified path but found something that was badly-formed).
4766 static const char* skip_over_field_name(const char* name,
4767 bool slash_ok,
4768 unsigned int length) {
4769 const char* p;
4770 jboolean last_is_slash = false;
4771 jboolean not_first_ch = false;
4772
4773 for (p = name; p != name + length; not_first_ch = true) {
4774 const char* old_p = p;
4775 jchar ch = *p;
4776 if (ch < 128) {
4777 p++;
4778 // quick check for ascii
4779 if ((ch >= 'a' && ch <= 'z') ||
4780 (ch >= 'A' && ch <= 'Z') ||
4781 (ch == '_' || ch == '$') ||
4782 (not_first_ch && ch >= '0' && ch <= '9')) {
4783 last_is_slash = false;
4784 continue;
4785 }
4786 if (slash_ok && ch == '/') {
4787 if (last_is_slash) {
4788 return NULL; // Don't permit consecutive slashes
4789 }
4790 last_is_slash = true;
4791 continue;
4792 }
4793 }
4794 else {
4795 jint unicode_ch;
4796 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4797 p = tmp_p;
4798 last_is_slash = false;
4799 // Check if ch is Java identifier start or is Java identifier part
4800 // 4672820: call java.lang.Character methods directly without generating separate tables.
4801 EXCEPTION_MARK;
4802
4803 // return value
4804 JavaValue result(T_BOOLEAN);
4805 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4806 JavaCallArguments args;
4807 args.push_int(unicode_ch);
4808
4809 // public static boolean isJavaIdentifierStart(char ch);
4810 JavaCalls::call_static(&result,
4811 SystemDictionary::Character_klass(),
4812 vmSymbols::isJavaIdentifierStart_name(),
4813 vmSymbols::int_bool_signature(),
4814 &args,
4815 THREAD);
4816
4817 if (HAS_PENDING_EXCEPTION) {
4818 CLEAR_PENDING_EXCEPTION;
4819 return 0;
4820 }
4821 if (result.get_jboolean()) {
4822 continue;
4823 }
4824
4825 if (not_first_ch) {
4826 // public static boolean isJavaIdentifierPart(char ch);
4827 JavaCalls::call_static(&result,
4828 SystemDictionary::Character_klass(),
4829 vmSymbols::isJavaIdentifierPart_name(),
4830 vmSymbols::int_bool_signature(),
4831 &args,
4832 THREAD);
4833
4834 if (HAS_PENDING_EXCEPTION) {
4835 CLEAR_PENDING_EXCEPTION;
4836 return 0;
4837 }
4838
4839 if (result.get_jboolean()) {
4840 continue;
4841 }
4842 }
4843 }
4844 return (not_first_ch) ? old_p : NULL;
4845 }
4846 return (not_first_ch) ? p : NULL;
4847 }
4848
4849 // Take pointer to a string. Skip over the longest part of the string that could
4850 // be taken as a field signature. Allow "void" if void_ok.
4851 // Return a pointer to just past the signature.
4852 // Return NULL if no legal signature is found.
4853 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4854 bool void_ok,
4855 unsigned int length,
4856 TRAPS) const {
4857 unsigned int array_dim = 0;
4858 while (length > 0) {
4859 switch (signature[0]) {
4860 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4861 case JVM_SIGNATURE_BOOLEAN:
4862 case JVM_SIGNATURE_BYTE:
4863 case JVM_SIGNATURE_CHAR:
4864 case JVM_SIGNATURE_SHORT:
4865 case JVM_SIGNATURE_INT:
4866 case JVM_SIGNATURE_FLOAT:
4867 case JVM_SIGNATURE_LONG:
4868 case JVM_SIGNATURE_DOUBLE:
4869 return signature + 1;
4870 case JVM_SIGNATURE_CLASS: {
4871 if (_major_version < JAVA_1_5_VERSION) {
4872 // Skip over the class name if one is there
4873 const char* const p = skip_over_field_name(signature + 1, true, --length);
4874
4875 // The next character better be a semicolon
4876 if (p && (p - signature) > 1 && p[0] == ';') {
4877 return p + 1;
4878 }
4879 }
4880 else {
4881 // Skip leading 'L' and ignore first appearance of ';'
4882 length--;
4883 signature++;
4884 char* c = strchr((char*) signature, ';');
4885 // Format check signature
4886 if (c != NULL) {
4887 ResourceMark rm(THREAD);
4888 int newlen = c - (char*) signature;
4889 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
4890 strncpy(sig, signature, newlen);
4891 sig[newlen] = '\0';
4892
4893 bool legal = verify_unqualified_name(sig, newlen, LegalClass);
4894 if (!legal) {
4895 classfile_parse_error("Class name contains illegal character "
4896 "in descriptor in class file %s",
4897 CHECK_0);
4898 return NULL;
4899 }
4900 return signature + newlen + 1;
4901 }
4902 }
4903 return NULL;
4904 }
4905 case JVM_SIGNATURE_ARRAY:
4906 array_dim++;
4907 if (array_dim > 255) {
4908 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4909 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4910 }
4911 // The rest of what's there better be a legal signature
4912 signature++;
4913 length--;
4914 void_ok = false;
4915 break;
4916 default:
4917 return NULL;
4918 }
4919 }
4920 return NULL;
4921 }
4922
4923 // Checks if name is a legal class name.
4924 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4925 if (!_need_verify || _relax_verify) { return; }
4926
4927 char buf[fixed_buffer_size];
4928 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4929 unsigned int length = name->utf8_length();
4930 bool legal = false;
4931
4932 if (length > 0) {
4933 const char* p;
4934 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4935 p = skip_over_field_signature(bytes, false, length, CHECK);
4936 legal = (p != NULL) && ((p - bytes) == (int)length);
4937 } else if (_major_version < JAVA_1_5_VERSION) {
4938 if (bytes[0] != '<') {
4939 p = skip_over_field_name(bytes, true, length);
4940 legal = (p != NULL) && ((p - bytes) == (int)length);
4941 }
4942 } else {
4943 // 4900761: relax the constraints based on JSR202 spec
4944 // Class names may be drawn from the entire Unicode character set.
4945 // Identifiers between '/' must be unqualified names.
4946 // The utf8 string has been verified when parsing cpool entries.
4947 legal = verify_unqualified_name(bytes, length, LegalClass);
4948 }
4949 }
4950 if (!legal) {
4951 ResourceMark rm(THREAD);
4952 assert(_class_name != NULL, "invariant");
4953 Exceptions::fthrow(
4954 THREAD_AND_LOCATION,
4955 vmSymbols::java_lang_ClassFormatError(),
4956 "Illegal class name \"%s\" in class file %s", bytes,
4957 _class_name->as_C_string()
4958 );
4959 return;
4960 }
4961 }
4962
4963 // Checks if name is a legal field name.
4964 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4965 if (!_need_verify || _relax_verify) { return; }
4966
4967 char buf[fixed_buffer_size];
4968 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4969 unsigned int length = name->utf8_length();
4970 bool legal = false;
4971
4972 if (length > 0) {
4973 if (_major_version < JAVA_1_5_VERSION) {
4974 if (bytes[0] != '<') {
4975 const char* p = skip_over_field_name(bytes, false, length);
4976 legal = (p != NULL) && ((p - bytes) == (int)length);
4977 }
4978 } else {
4979 // 4881221: relax the constraints based on JSR202 spec
4980 legal = verify_unqualified_name(bytes, length, LegalField);
4981 }
4982 }
4983
4984 if (!legal) {
4985 ResourceMark rm(THREAD);
4986 assert(_class_name != NULL, "invariant");
4987 Exceptions::fthrow(
4988 THREAD_AND_LOCATION,
4989 vmSymbols::java_lang_ClassFormatError(),
4990 "Illegal field name \"%s\" in class %s", bytes,
4991 _class_name->as_C_string()
4992 );
4993 return;
4994 }
4995 }
4996
4997 // Checks if name is a legal method name.
4998 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4999 if (!_need_verify || _relax_verify) { return; }
5000
5001 assert(name != NULL, "method name is null");
5002 char buf[fixed_buffer_size];
5003 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5004 unsigned int length = name->utf8_length();
5005 bool legal = false;
5006
5007 if (length > 0) {
5008 if (bytes[0] == '<') {
5009 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5010 legal = true;
5011 }
5012 } else if (_major_version < JAVA_1_5_VERSION) {
5013 const char* p;
5014 p = skip_over_field_name(bytes, false, length);
5015 legal = (p != NULL) && ((p - bytes) == (int)length);
5016 } else {
5017 // 4881221: relax the constraints based on JSR202 spec
5018 legal = verify_unqualified_name(bytes, length, LegalMethod);
5019 }
5020 }
5021
5022 if (!legal) {
5023 ResourceMark rm(THREAD);
5024 assert(_class_name != NULL, "invariant");
5025 Exceptions::fthrow(
5026 THREAD_AND_LOCATION,
5027 vmSymbols::java_lang_ClassFormatError(),
5028 "Illegal method name \"%s\" in class %s", bytes,
5029 _class_name->as_C_string()
5030 );
5031 return;
5032 }
5033 }
5034
5035
5036 // Checks if signature is a legal field signature.
5037 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5038 const Symbol* signature,
5039 TRAPS) const {
5040 if (!_need_verify) { return; }
5041
5042 char buf[fixed_buffer_size];
5043 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5044 const unsigned int length = signature->utf8_length();
5045 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5046
5047 if (p == NULL || (p - bytes) != (int)length) {
5048 throwIllegalSignature("Field", name, signature, CHECK);
5049 }
5050 }
5051
5052 // Checks if signature is a legal method signature.
5053 // Returns number of parameters
5054 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5055 const Symbol* signature,
5056 TRAPS) const {
5057 if (!_need_verify) {
5058 // make sure caller's args_size will be less than 0 even for non-static
5059 // method so it will be recomputed in compute_size_of_parameters().
5060 return -2;
5061 }
5062
5063 // Class initializers cannot have args for class format version >= 51.
5064 if (name == vmSymbols::class_initializer_name() &&
5065 signature != vmSymbols::void_method_signature() &&
5066 _major_version >= JAVA_7_VERSION) {
5067 throwIllegalSignature("Method", name, signature, CHECK_0);
5068 return 0;
5069 }
5070
5071 unsigned int args_size = 0;
5072 char buf[fixed_buffer_size];
5073 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5074 unsigned int length = signature->utf8_length();
5075 const char* nextp;
5076
5077 // The first character must be a '('
5078 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5079 length--;
5080 // Skip over legal field signatures
5081 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5082 while ((length > 0) && (nextp != NULL)) {
5083 args_size++;
5084 if (p[0] == 'J' || p[0] == 'D') {
5085 args_size++;
5086 }
5087 length -= nextp - p;
5088 p = nextp;
5089 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5090 }
5091 // The first non-signature thing better be a ')'
5092 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5093 length--;
5094 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5095 // All internal methods must return void
5096 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5097 return args_size;
5098 }
5099 } else {
5100 // Now we better just have a return value
5101 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5102 if (nextp && ((int)length == (nextp - p))) {
5103 return args_size;
5104 }
5105 }
5106 }
5107 }
5108 // Report error
5109 throwIllegalSignature("Method", name, signature, CHECK_0);
5110 return 0;
5111 }
5112
5113 int ClassFileParser::static_field_size() const {
5114 assert(_field_info != NULL, "invariant");
5115 return _field_info->static_field_size;
5116 }
5117
5118 int ClassFileParser::total_oop_map_count() const {
5119 assert(_field_info != NULL, "invariant");
5120 return _field_info->total_oop_map_count;
5121 }
5122
5123 jint ClassFileParser::layout_size() const {
5124 assert(_field_info != NULL, "invariant");
5125 return _field_info->instance_size;
5126 }
5127
5128 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5129 const Array<Method*>* methods) {
5130 assert(ik != NULL, "invariant");
5131 assert(methods != NULL, "invariant");
5132
5133 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5134 // (We used to do this lazily, but now we query it in Rewriter,
5135 // which is eagerly done for every method, so we might as well do it now,
5136 // when everything is fresh in memory.)
5137 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5138
5139 if (klass_id != vmSymbols::NO_SID) {
5140 for (int j = 0; j < methods->length(); ++j) {
5141 Method* method = methods->at(j);
5142 method->init_intrinsic_id();
5143
5144 if (CheckIntrinsics) {
5145 // Check if an intrinsic is defined for method 'method',
5146 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5147 if (method->intrinsic_id() != vmIntrinsics::_none &&
5148 !method->intrinsic_candidate()) {
5149 tty->print("Compiler intrinsic is defined for method [%s], "
5150 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5151 method->name_and_sig_as_C_string(),
5152 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5153 );
5154 tty->cr();
5155 DEBUG_ONLY(vm_exit(1));
5156 }
5157 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5158 // but there is no intrinsic available for it.
5159 if (method->intrinsic_candidate() &&
5160 method->intrinsic_id() == vmIntrinsics::_none) {
5161 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5162 "but no compiler intrinsic is defined for the method.%s",
5163 method->name_and_sig_as_C_string(),
5164 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5165 );
5166 tty->cr();
5167 DEBUG_ONLY(vm_exit(1));
5168 }
5169 }
5170 } // end for
5171
5172 #ifdef ASSERT
5173 if (CheckIntrinsics) {
5174 // Check for orphan methods in the current class. A method m
5175 // of a class C is orphan if an intrinsic is defined for method m,
5176 // but class C does not declare m.
5177 // The check is potentially expensive, therefore it is available
5178 // only in debug builds.
5179
5180 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5181 if (vmIntrinsics::_compiledLambdaForm == id) {
5182 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5183 // generated for the JVM from a LambdaForm and therefore no method
5184 // is defined for it.
5185 continue;
5186 }
5187
5188 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5189 // Check if the current class contains a method with the same
5190 // name, flags, signature.
5191 bool match = false;
5192 for (int j = 0; j < methods->length(); ++j) {
5193 const Method* method = methods->at(j);
5194 if (method->intrinsic_id() == id) {
5195 match = true;
5196 break;
5197 }
5198 }
5199
5200 if (!match) {
5201 char buf[1000];
5202 tty->print("Compiler intrinsic is defined for method [%s], "
5203 "but the method is not available in class [%s].%s",
5204 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5205 buf, sizeof(buf)),
5206 ik->name()->as_C_string(),
5207 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5208 );
5209 tty->cr();
5210 DEBUG_ONLY(vm_exit(1));
5211 }
5212 }
5213 } // end for
5214 } // CheckIntrinsics
5215 #endif // ASSERT
5216 }
5217 }
5218
5219 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5220 if (_klass != NULL) {
5221 return _klass;
5222 }
5223
5224 InstanceKlass* const ik =
5225 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5226
5227 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5228
5229 assert(_klass == ik, "invariant");
5230
5231 ik->set_has_passed_fingerprint_check(false);
5232 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5233 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5234 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5235 // This class matches with a class saved in an AOT library
5236 ik->set_has_passed_fingerprint_check(true);
5237 } else {
5238 ResourceMark rm;
5239 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5240 ik->external_name(), aot_fp, _stream->compute_fingerprint());
5241 }
5242 }
5243
5244 return ik;
5245 }
5246
5247 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5248 assert(ik != NULL, "invariant");
5249
5250 set_klass_to_deallocate(ik);
5251
5252 assert(_field_info != NULL, "invariant");
5253 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5254 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5255 "sanity");
5256
5257 assert(ik->is_instance_klass(), "sanity");
5258 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5259
5260 // Fill in information already parsed
5261 ik->set_should_verify_class(_need_verify);
5262
5263 // Not yet: supers are done below to support the new subtype-checking fields
5264 ik->set_class_loader_data(_loader_data);
5265 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5266 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5267 assert(_fac != NULL, "invariant");
5268 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5269
5270 // this transfers ownership of a lot of arrays from
5271 // the parser onto the InstanceKlass*
5272 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5273
5274 // note that is not safe to use the fields in the parser from this point on
5275 assert(NULL == _cp, "invariant");
5276 assert(NULL == _fields, "invariant");
5277 assert(NULL == _methods, "invariant");
5278 assert(NULL == _inner_classes, "invariant");
5279 assert(NULL == _local_interfaces, "invariant");
5280 assert(NULL == _transitive_interfaces, "invariant");
5281 assert(NULL == _combined_annotations, "invariant");
5282
5283 if (_has_final_method) {
5284 ik->set_has_final_method();
5285 }
5286
5287 ik->copy_method_ordering(_method_ordering, CHECK);
5288 // The InstanceKlass::_methods_jmethod_ids cache
5289 // is managed on the assumption that the initial cache
5290 // size is equal to the number of methods in the class. If
5291 // that changes, then InstanceKlass::idnum_can_increment()
5292 // has to be changed accordingly.
5293 ik->set_initial_method_idnum(ik->methods()->length());
5294
5295 ik->set_name(_class_name);
5296
5297 if (is_anonymous()) {
5298 // I am well known to myself
5299 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve
5300 }
5301
5302 ik->set_minor_version(_minor_version);
5303 ik->set_major_version(_major_version);
5304 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5305 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5306
5307 if (_host_klass != NULL) {
5308 assert (ik->is_anonymous(), "should be the same");
5309 ik->set_host_klass(_host_klass);
5310 }
5311
5312 // Set PackageEntry for this_klass
5313 oop cl = ik->class_loader();
5314 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5315 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5316 ik->set_package(cld, CHECK);
5317
5318 const Array<Method*>* const methods = ik->methods();
5319 assert(methods != NULL, "invariant");
5320 const int methods_len = methods->length();
5321
5322 check_methods_for_intrinsics(ik, methods);
5323
5324 // Fill in field values obtained by parse_classfile_attributes
5325 if (_parsed_annotations->has_any_annotations()) {
5326 _parsed_annotations->apply_to(ik);
5327 }
5328
5329 apply_parsed_class_attributes(ik);
5330
5331 // Miranda methods
5332 if ((_num_miranda_methods > 0) ||
5333 // if this class introduced new miranda methods or
5334 (_super_klass != NULL && _super_klass->has_miranda_methods())
5335 // super class exists and this class inherited miranda methods
5336 ) {
5337 ik->set_has_miranda_methods(); // then set a flag
5338 }
5339
5340 // Fill in information needed to compute superclasses.
5341 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5342
5343 // Initialize itable offset tables
5344 klassItable::setup_itable_offset_table(ik);
5345
5346 // Compute transitive closure of interfaces this class implements
5347 // Do final class setup
5348 fill_oop_maps(ik,
5349 _field_info->nonstatic_oop_map_count,
5350 _field_info->nonstatic_oop_offsets,
5351 _field_info->nonstatic_oop_counts);
5352
5353 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5354 set_precomputed_flags(ik);
5355
5356 // check if this class can access its super class
5357 check_super_class_access(ik, CHECK);
5358
5359 // check if this class can access its superinterfaces
5360 check_super_interface_access(ik, CHECK);
5361
5362 // check if this class overrides any final method
5363 check_final_method_override(ik, CHECK);
5364
5365 // reject static interface methods prior to Java 8
5366 if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5367 check_illegal_static_method(ik, CHECK);
5368 }
5369
5370 // Obtain this_klass' module entry
5371 ModuleEntry* module_entry = ik->module();
5372 assert(module_entry != NULL, "module_entry should always be set");
5373
5374 // Obtain java.lang.reflect.Module
5375 Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module()));
5376
5377 // Allocate mirror and initialize static fields
5378 // The create_mirror() call will also call compute_modifiers()
5379 java_lang_Class::create_mirror(ik,
5380 _loader_data->class_loader(),
5381 module_handle,
5382 _protection_domain,
5383 CHECK);
5384
5385 assert(_all_mirandas != NULL, "invariant");
5386
5387 // Generate any default methods - default methods are public interface methods
5388 // that have a default implementation. This is new with Java 8.
5389 if (_has_nonstatic_concrete_methods) {
5390 DefaultMethods::generate_default_methods(ik,
5391 _all_mirandas,
5392 CHECK);
5393 }
5394
5395 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5396 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5397 !module_entry->has_default_read_edges()) {
5398 if (!module_entry->set_has_default_read_edges()) {
5399 // We won a potential race
5400 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5401 }
5402 }
5403
5404 // Update the loader_data graph.
5405 record_defined_class_dependencies(ik, CHECK);
5406
5407 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5408
5409 if (!is_internal()) {
5410 if (log_is_enabled(Info, class, load)) {
5411 ResourceMark rm;
5412 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5413
5414 if (log_is_enabled(Info, class, load)) {
5415 ik->print_loading_log(LogLevel::Info, _loader_data, module_name, _stream);
5416 }
5417 // No 'else' here as logging levels are not mutually exclusive
5418 if (log_is_enabled(Debug, class, load)) {
5419 ik->print_loading_log(LogLevel::Debug, _loader_data, module_name, _stream);
5420 }
5421 }
5422
5423 if (log_is_enabled(Debug, class, resolve)) {
5424 ResourceMark rm;
5425 // print out the superclass.
5426 const char * from = ik->external_name();
5427 if (ik->java_super() != NULL) {
5428 log_debug(class, resolve)("%s %s (super)",
5429 from,
5430 ik->java_super()->external_name());
5431 }
5432 // print out each of the interface classes referred to by this class.
5433 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5434 if (local_interfaces != NULL) {
5435 const int length = local_interfaces->length();
5436 for (int i = 0; i < length; i++) {
5437 const Klass* const k = local_interfaces->at(i);
5438 const char * to = k->external_name();
5439 log_debug(class, resolve)("%s %s (interface)", from, to);
5440 }
5441 }
5442 }
5443 }
5444
5445 TRACE_INIT_ID(ik);
5446
5447 // If we reach here, all is well.
5448 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5449 // in order for it to not be destroyed in the ClassFileParser destructor.
5450 set_klass_to_deallocate(NULL);
5451
5452 // it's official
5453 set_klass(ik);
5454
5455 debug_only(ik->verify();)
5456 }
5457
5458 // For an anonymous class that is in the unnamed package, move it to its host class's
5459 // package by prepending its host class's package name to its class name and setting
5460 // its _class_name field.
5461 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5462 ResourceMark rm(THREAD);
5463 assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5464 "Anonymous class should not be in a package");
5465 const char* host_pkg_name =
5466 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5467
5468 if (host_pkg_name != NULL) {
5469 size_t host_pkg_len = strlen(host_pkg_name);
5470 int class_name_len = _class_name->utf8_length();
5471 char* new_anon_name =
5472 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5473 // Copy host package name and trailing /.
5474 strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5475 new_anon_name[host_pkg_len] = '/';
5476 // Append anonymous class name. The anonymous class name can contain odd
5477 // characters. So, do a strncpy instead of using sprintf("%s...").
5478 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5479
5480 // Create a symbol and update the anonymous class name.
5481 _class_name = SymbolTable::new_symbol(new_anon_name,
5482 (int)host_pkg_len + 1 + class_name_len,
5483 CHECK);
5484 }
5485 }
5486
5487 // If the host class and the anonymous class are in the same package then do
5488 // nothing. If the anonymous class is in the unnamed package then move it to its
5489 // host's package. If the classes are in different packages then throw an IAE
5490 // exception.
5491 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5492 assert(_host_klass != NULL, "Expected an anonymous class");
5493
5494 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5495 _class_name->utf8_length(), '/');
5496 if (anon_last_slash == NULL) { // Unnamed package
5497 prepend_host_package_name(_host_klass, CHECK);
5498 } else {
5499 if (!InstanceKlass::is_same_class_package(_host_klass->class_loader(),
5500 _host_klass->name(),
5501 _host_klass->class_loader(),
5502 _class_name)) {
5503 ResourceMark rm(THREAD);
5504 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5505 err_msg("Host class %s and anonymous class %s are in different packages",
5506 _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5507 }
5508 }
5509 }
5510
5511 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5512 bool trusted = (loader_data->is_the_null_class_loader_data() ||
5513 SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5514 bool need_verify =
5515 // verifyAll
5516 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5517 // verifyRemote
5518 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5519 return !need_verify;
5520 }
5521
5522 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5523 Symbol* name,
5524 ClassLoaderData* loader_data,
5525 Handle protection_domain,
5526 const InstanceKlass* host_klass,
5527 GrowableArray<Handle>* cp_patches,
5528 Publicity pub_level,
5529 TRAPS) :
5530 _stream(stream),
5531 _requested_name(name),
5532 _loader_data(loader_data),
5533 _host_klass(host_klass),
5534 _cp_patches(cp_patches),
5535 _super_klass(),
5536 _cp(NULL),
5537 _fields(NULL),
5538 _methods(NULL),
5539 _inner_classes(NULL),
5540 _local_interfaces(NULL),
5541 _transitive_interfaces(NULL),
5542 _combined_annotations(NULL),
5543 _annotations(NULL),
5544 _type_annotations(NULL),
5545 _fields_annotations(NULL),
5546 _fields_type_annotations(NULL),
5547 _klass(NULL),
5548 _klass_to_deallocate(NULL),
5549 _parsed_annotations(NULL),
5550 _fac(NULL),
5551 _field_info(NULL),
5552 _method_ordering(NULL),
5553 _all_mirandas(NULL),
5554 _vtable_size(0),
5555 _itable_size(0),
5556 _num_miranda_methods(0),
5557 _rt(REF_NONE),
5558 _protection_domain(protection_domain),
5559 _access_flags(),
5560 _pub_level(pub_level),
5561 _synthetic_flag(false),
5562 _sde_length(false),
5563 _sde_buffer(NULL),
5564 _sourcefile_index(0),
5565 _generic_signature_index(0),
5566 _major_version(0),
5567 _minor_version(0),
5568 _this_class_index(0),
5569 _super_class_index(0),
5570 _itfs_len(0),
5571 _java_fields_count(0),
5572 _need_verify(false),
5573 _relax_verify(false),
5574 _has_nonstatic_concrete_methods(false),
5575 _declares_nonstatic_concrete_methods(false),
5576 _has_final_method(false),
5577 _has_finalizer(false),
5578 _has_empty_finalizer(false),
5579 _has_vanilla_constructor(false),
5580 _max_bootstrap_specifier_index(-1) {
5581
5582 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5583
5584 assert(THREAD->is_Java_thread(), "invariant");
5585 assert(_loader_data != NULL, "invariant");
5586 assert(stream != NULL, "invariant");
5587 assert(_stream != NULL, "invariant");
5588 assert(_stream->buffer() == _stream->current(), "invariant");
5589 assert(_class_name != NULL, "invariant");
5590 assert(0 == _access_flags.as_int(), "invariant");
5591
5592 // Figure out whether we can skip format checking (matching classic VM behavior)
5593 if (DumpSharedSpaces) {
5594 // verify == true means it's a 'remote' class (i.e., non-boot class)
5595 // Verification decision is based on BytecodeVerificationRemote flag
5596 // for those classes.
5597 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5598 BytecodeVerificationLocal;
5599 }
5600 else {
5601 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5602 stream->need_verify());
5603 }
5604
5605 // synch back verification state to stream
5606 stream->set_verify(_need_verify);
5607
5608 // Check if verification needs to be relaxed for this class file
5609 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5610 _relax_verify = relax_format_check_for(_loader_data);
5611
5612 parse_stream(stream, CHECK);
5613
5614 post_process_parsed_stream(stream, _cp, CHECK);
5615 }
5616
5617 void ClassFileParser::clear_class_metadata() {
5618 // metadata created before the instance klass is created. Must be
5619 // deallocated if classfile parsing returns an error.
5620 _cp = NULL;
5621 _fields = NULL;
5622 _methods = NULL;
5623 _inner_classes = NULL;
5624 _local_interfaces = NULL;
5625 _transitive_interfaces = NULL;
5626 _combined_annotations = NULL;
5627 _annotations = _type_annotations = NULL;
5628 _fields_annotations = _fields_type_annotations = NULL;
5629 }
5630
5631 // Destructor to clean up
5632 ClassFileParser::~ClassFileParser() {
5633 if (_cp != NULL) {
5634 MetadataFactory::free_metadata(_loader_data, _cp);
5635 }
5636 if (_fields != NULL) {
5637 MetadataFactory::free_array<u2>(_loader_data, _fields);
5638 }
5639
5640 if (_methods != NULL) {
5641 // Free methods
5642 InstanceKlass::deallocate_methods(_loader_data, _methods);
5643 }
5644
5645 // beware of the Universe::empty_blah_array!!
5646 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5647 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5648 }
5649
5650 // Free interfaces
5651 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5652 _local_interfaces, _transitive_interfaces);
5653
5654 if (_combined_annotations != NULL) {
5655 // After all annotations arrays have been created, they are installed into the
5656 // Annotations object that will be assigned to the InstanceKlass being created.
5657
5658 // Deallocate the Annotations object and the installed annotations arrays.
5659 _combined_annotations->deallocate_contents(_loader_data);
5660
5661 // If the _combined_annotations pointer is non-NULL,
5662 // then the other annotations fields should have been cleared.
5663 assert(_annotations == NULL, "Should have been cleared");
5664 assert(_type_annotations == NULL, "Should have been cleared");
5665 assert(_fields_annotations == NULL, "Should have been cleared");
5666 assert(_fields_type_annotations == NULL, "Should have been cleared");
5667 } else {
5668 // If the annotations arrays were not installed into the Annotations object,
5669 // then they have to be deallocated explicitly.
5670 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5671 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5672 Annotations::free_contents(_loader_data, _fields_annotations);
5673 Annotations::free_contents(_loader_data, _fields_type_annotations);
5674 }
5675
5676 clear_class_metadata();
5677
5678 // deallocate the klass if already created. Don't directly deallocate, but add
5679 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5680 // at a safepoint.
5681 if (_klass_to_deallocate != NULL) {
5682 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5683 }
5684 }
5685
5686 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5687 TRAPS) {
5688
5689 assert(stream != NULL, "invariant");
5690 assert(_class_name != NULL, "invariant");
5691
5692 // BEGIN STREAM PARSING
5693 stream->guarantee_more(8, CHECK); // magic, major, minor
5694 // Magic value
5695 const u4 magic = stream->get_u4_fast();
5696 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5697 "Incompatible magic value %u in class file %s",
5698 magic, CHECK);
5699
5700 // Version numbers
5701 _minor_version = stream->get_u2_fast();
5702 _major_version = stream->get_u2_fast();
5703
5704 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5705 ResourceMark rm;
5706 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5707 _major_version, _minor_version, _class_name->as_C_string());
5708 Exceptions::fthrow(
5709 THREAD_AND_LOCATION,
5710 vmSymbols::java_lang_UnsupportedClassVersionError(),
5711 "Unsupported major.minor version for dump time %u.%u",
5712 _major_version,
5713 _minor_version);
5714 }
5715
5716 // Check version numbers - we check this even with verifier off
5717 if (!is_supported_version(_major_version, _minor_version)) {
5718 ResourceMark rm(THREAD);
5719 Exceptions::fthrow(
5720 THREAD_AND_LOCATION,
5721 vmSymbols::java_lang_UnsupportedClassVersionError(),
5722 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5723 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
5724 _class_name->as_C_string(),
5725 _major_version,
5726 _minor_version,
5727 JAVA_MAX_SUPPORTED_VERSION,
5728 JAVA_MAX_SUPPORTED_MINOR_VERSION);
5729 return;
5730 }
5731
5732 stream->guarantee_more(3, CHECK); // length, first cp tag
5733 const u2 cp_size = stream->get_u2_fast();
5734
5735 guarantee_property(
5736 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5737 cp_size, CHECK);
5738
5739 _cp = ConstantPool::allocate(_loader_data,
5740 cp_size,
5741 CHECK);
5742
5743 ConstantPool* const cp = _cp;
5744
5745 parse_constant_pool(stream, cp, cp_size, CHECK);
5746
5747 assert(cp_size == (const u2)cp->length(), "invariant");
5748
5749 // ACCESS FLAGS
5750 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5751
5752 // Access flags
5753 jint flags;
5754 // JVM_ACC_MODULE is defined in JDK-9 and later.
5755 if (_major_version >= JAVA_9_VERSION) {
5756 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5757 } else {
5758 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5759 }
5760
5761 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5762 // Set abstract bit for old class files for backward compatibility
5763 flags |= JVM_ACC_ABSTRACT;
5764 }
5765
5766 verify_legal_class_modifiers(flags, CHECK);
5767
5768 _access_flags.set_flags(flags);
5769
5770
5771 // This class and superclass
5772 _this_class_index = stream->get_u2_fast();
5773 check_property(
5774 valid_cp_range(_this_class_index, cp_size) &&
5775 cp->tag_at(_this_class_index).is_unresolved_klass(),
5776 "Invalid this class index %u in constant pool in class file %s",
5777 _this_class_index, CHECK);
5778
5779 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5780 assert(class_name_in_cp != NULL, "class_name can't be null");
5781
5782 // Update _class_name which could be null previously
5783 // to reflect the name in the constant pool
5784 _class_name = class_name_in_cp;
5785
5786 // Don't need to check whether this class name is legal or not.
5787 // It has been checked when constant pool is parsed.
5788 // However, make sure it is not an array type.
5789 if (_need_verify) {
5790 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
5791 "Bad class name in class file %s",
5792 CHECK);
5793 }
5794
5795 // Checks if name in class file matches requested name
5796 if (_requested_name != NULL && _requested_name != _class_name) {
5797 ResourceMark rm(THREAD);
5798 Exceptions::fthrow(
5799 THREAD_AND_LOCATION,
5800 vmSymbols::java_lang_NoClassDefFoundError(),
5801 "%s (wrong name: %s)",
5802 _class_name->as_C_string(),
5803 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
5804 );
5805 return;
5806 }
5807
5808 // if this is an anonymous class fix up its name if it's in the unnamed
5809 // package. Otherwise, throw IAE if it is in a different package than
5810 // its host class.
5811 if (_host_klass != NULL) {
5812 fix_anonymous_class_name(CHECK);
5813 }
5814
5815 // Verification prevents us from creating names with dots in them, this
5816 // asserts that that's the case.
5817 assert(is_internal_format(_class_name), "external class name format used internally");
5818
5819 if (!is_internal()) {
5820 if (log_is_enabled(Debug, class, preorder)){
5821 ResourceMark rm(THREAD);
5822 outputStream* log = Log(class, preorder)::debug_stream();
5823 log->print("%s", _class_name->as_klass_external_name());
5824 if (stream->source() != NULL) {
5825 log->print(" source: %s", stream->source());
5826 }
5827 log->cr();
5828 }
5829
5830 #if INCLUDE_CDS
5831 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5832 // Only dump the classes that can be stored into CDS archive.
5833 // Anonymous classes such as generated LambdaForm classes are also not included.
5834 if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
5835 _host_klass == NULL) {
5836 oop class_loader = _loader_data->class_loader();
5837 ResourceMark rm(THREAD);
5838 // For the boot and platform class loaders, check if the class is not found in the
5839 // java runtime image. Additional check for the boot class loader is if the class
5840 // is not found in the boot loader's appended entries. This indicates that the class
5841 // is not useable during run time, such as the ones found in the --patch-module entries,
5842 // so it should not be included in the classlist file.
5843 if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) ||
5844 SystemDictionary::is_platform_class_loader(class_loader)) &&
5845 !ClassLoader::is_jrt(stream->source())) {
5846 tty->print_cr("skip writing class %s from source %s to classlist file",
5847 _class_name->as_C_string(), stream->source());
5848 } else {
5849 classlist_file->print_cr("%s", _class_name->as_C_string());
5850 classlist_file->flush();
5851 }
5852 }
5853 }
5854 #endif
5855 }
5856
5857 // SUPERKLASS
5858 _super_class_index = stream->get_u2_fast();
5859 _super_klass = parse_super_class(cp,
5860 _super_class_index,
5861 _need_verify,
5862 CHECK);
5863
5864 // Interfaces
5865 _itfs_len = stream->get_u2_fast();
5866 parse_interfaces(stream,
5867 _itfs_len,
5868 cp,
5869 &_has_nonstatic_concrete_methods,
5870 CHECK);
5871
5872 assert(_local_interfaces != NULL, "invariant");
5873
5874 // Fields (offsets are filled in later)
5875 _fac = new FieldAllocationCount();
5876 parse_fields(stream,
5877 _access_flags.is_interface(),
5878 _fac,
5879 cp,
5880 cp_size,
5881 &_java_fields_count,
5882 CHECK);
5883
5884 assert(_fields != NULL, "invariant");
5885
5886 // Methods
5887 AccessFlags promoted_flags;
5888 parse_methods(stream,
5889 _access_flags.is_interface(),
5890 &promoted_flags,
5891 &_has_final_method,
5892 &_declares_nonstatic_concrete_methods,
5893 CHECK);
5894
5895 assert(_methods != NULL, "invariant");
5896
5897 // promote flags from parse_methods() to the klass' flags
5898 _access_flags.add_promoted_flags(promoted_flags.as_int());
5899
5900 if (_declares_nonstatic_concrete_methods) {
5901 _has_nonstatic_concrete_methods = true;
5902 }
5903
5904 // Additional attributes/annotations
5905 _parsed_annotations = new ClassAnnotationCollector();
5906 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5907
5908 assert(_inner_classes != NULL, "invariant");
5909
5910 // Finalize the Annotations metadata object,
5911 // now that all annotation arrays have been created.
5912 create_combined_annotations(CHECK);
5913
5914 // Make sure this is the end of class file stream
5915 guarantee_property(stream->at_eos(),
5916 "Extra bytes at the end of class file %s",
5917 CHECK);
5918
5919 // all bytes in stream read and parsed
5920 }
5921
5922 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5923 ConstantPool* cp,
5924 TRAPS) {
5925 assert(stream != NULL, "invariant");
5926 assert(stream->at_eos(), "invariant");
5927 assert(cp != NULL, "invariant");
5928 assert(_loader_data != NULL, "invariant");
5929
5930 if (_class_name == vmSymbols::java_lang_Object()) {
5931 check_property(_local_interfaces == Universe::the_empty_klass_array(),
5932 "java.lang.Object cannot implement an interface in class file %s",
5933 CHECK);
5934 }
5935 // We check super class after class file is parsed and format is checked
5936 if (_super_class_index > 0 && NULL ==_super_klass) {
5937 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5938 if (_access_flags.is_interface()) {
5939 // Before attempting to resolve the superclass, check for class format
5940 // errors not checked yet.
5941 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5942 "Interfaces must have java.lang.Object as superclass in class file %s",
5943 CHECK);
5944 }
5945 _super_klass = (const InstanceKlass*)
5946 SystemDictionary::resolve_super_or_fail(_class_name,
5947 super_class_name,
5948 _loader_data->class_loader(),
5949 _protection_domain,
5950 true,
5951 CHECK);
5952 }
5953
5954 if (_super_klass != NULL) {
5955 if (_super_klass->has_nonstatic_concrete_methods()) {
5956 _has_nonstatic_concrete_methods = true;
5957 }
5958
5959 if (_super_klass->is_interface()) {
5960 ResourceMark rm(THREAD);
5961 Exceptions::fthrow(
5962 THREAD_AND_LOCATION,
5963 vmSymbols::java_lang_IncompatibleClassChangeError(),
5964 "class %s has interface %s as super class",
5965 _class_name->as_klass_external_name(),
5966 _super_klass->external_name()
5967 );
5968 return;
5969 }
5970 // Make sure super class is not final
5971 if (_super_klass->is_final()) {
5972 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
5973 }
5974 }
5975
5976 // Compute the transitive list of all unique interfaces implemented by this class
5977 _transitive_interfaces =
5978 compute_transitive_interfaces(_super_klass,
5979 _local_interfaces,
5980 _loader_data,
5981 CHECK);
5982
5983 assert(_transitive_interfaces != NULL, "invariant");
5984
5985 // sort methods
5986 _method_ordering = sort_methods(_methods);
5987
5988 _all_mirandas = new GrowableArray<Method*>(20);
5989
5990 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5991 &_num_miranda_methods,
5992 _all_mirandas,
5993 _super_klass,
5994 _methods,
5995 _access_flags,
5996 _major_version,
5997 _loader_data->class_loader(),
5998 _class_name,
5999 _local_interfaces,
6000 CHECK);
6001
6002 // Size of Java itable (in words)
6003 _itable_size = _access_flags.is_interface() ? 0 :
6004 klassItable::compute_itable_size(_transitive_interfaces);
6005
6006 assert(_fac != NULL, "invariant");
6007 assert(_parsed_annotations != NULL, "invariant");
6008
6009 _field_info = new FieldLayoutInfo();
6010 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6011
6012 // Compute reference typ
6013 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6014
6015 }
6016
6017 void ClassFileParser::set_klass(InstanceKlass* klass) {
6018
6019 #ifdef ASSERT
6020 if (klass != NULL) {
6021 assert(NULL == _klass, "leaking?");
6022 }
6023 #endif
6024
6025 _klass = klass;
6026 }
6027
6028 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6029
6030 #ifdef ASSERT
6031 if (klass != NULL) {
6032 assert(NULL == _klass_to_deallocate, "leaking?");
6033 }
6034 #endif
6035
6036 _klass_to_deallocate = klass;
6037 }
6038
6039 // Caller responsible for ResourceMark
6040 // clone stream with rewound position
6041 const ClassFileStream* ClassFileParser::clone_stream() const {
6042 assert(_stream != NULL, "invariant");
6043
6044 return _stream->clone();
6045 }
6046 // ----------------------------------------------------------------------------
6047 // debugging
6048
6049 #ifdef ASSERT
6050
6051 // return true if class_name contains no '.' (internal format is '/')
6052 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6053 if (class_name != NULL) {
6054 ResourceMark rm;
6055 char* name = class_name->as_C_string();
6056 return strchr(name, '.') == NULL;
6057 } else {
6058 return true;
6059 }
6060 }
6061
6062 #endif