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