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 if (atype != BAD_ALLOCATION_TYPE) {
1405 // Make sure there is no overflow with injected fields.
1406 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1407 count[atype]++;
1408 }
1409 return atype;
1410 }
1411 };
1412
1413 // Side-effects: populates the _fields, _fields_annotations,
1414 // _fields_type_annotations fields
1415 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1416 bool is_interface,
1417 FieldAllocationCount* const fac,
1418 ConstantPool* cp,
1419 const int cp_size,
1420 u2* const java_fields_count_ptr,
1421 TRAPS) {
1422
1423 assert(cfs != NULL, "invariant");
1424 assert(fac != NULL, "invariant");
1425 assert(cp != NULL, "invariant");
1426 assert(java_fields_count_ptr != NULL, "invariant");
1427
1428 assert(NULL == _fields, "invariant");
1429 assert(NULL == _fields_annotations, "invariant");
1430 assert(NULL == _fields_type_annotations, "invariant");
1431
1432 cfs->guarantee_more(2, CHECK); // length
1433 const u2 length = cfs->get_u2_fast();
1434 *java_fields_count_ptr = length;
1435
1436 int num_injected = 0;
1437 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1438 &num_injected);
1439 const int total_fields = length + num_injected;
1440
1441 // The field array starts with tuples of shorts
1442 // [access, name index, sig index, initial value index, byte offset].
1443 // A generic signature slot only exists for field with generic
1444 // signature attribute. And the access flag is set with
1445 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1446 // signature slots are at the end of the field array and after all
1447 // other fields data.
1448 //
1449 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1450 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1451 // ...
1452 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1453 // [generic signature index]
1454 // [generic signature index]
1455 // ...
1456 //
1457 // Allocate a temporary resource array for field data. For each field,
1458 // a slot is reserved in the temporary array for the generic signature
1459 // index. After parsing all fields, the data are copied to a permanent
1460 // array and any unused slots will be discarded.
1461 ResourceMark rm(THREAD);
1462 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1463 u2,
1464 total_fields * (FieldInfo::field_slots + 1));
1465
1466 // The generic signature slots start after all other fields' data.
1467 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1468 int num_generic_signature = 0;
1469 for (int n = 0; n < length; n++) {
1470 // access_flags, name_index, descriptor_index, attributes_count
1471 cfs->guarantee_more(8, CHECK);
1472
1473 AccessFlags access_flags;
1474 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1475 verify_legal_field_modifiers(flags, is_interface, CHECK);
1476 access_flags.set_flags(flags);
1477
1478 const u2 name_index = cfs->get_u2_fast();
1479 check_property(valid_symbol_at(name_index),
1480 "Invalid constant pool index %u for field name in class file %s",
1481 name_index, CHECK);
1482 const Symbol* const name = cp->symbol_at(name_index);
1483 verify_legal_field_name(name, CHECK);
1484
1485 const u2 signature_index = cfs->get_u2_fast();
1486 check_property(valid_symbol_at(signature_index),
1487 "Invalid constant pool index %u for field signature in class file %s",
1488 signature_index, CHECK);
1489 const Symbol* const sig = cp->symbol_at(signature_index);
1490 verify_legal_field_signature(name, sig, CHECK);
1491
1492 u2 constantvalue_index = 0;
1493 bool is_synthetic = false;
1494 u2 generic_signature_index = 0;
1495 const bool is_static = access_flags.is_static();
1496 FieldAnnotationCollector parsed_annotations(_loader_data);
1497
1498 const u2 attributes_count = cfs->get_u2_fast();
1499 if (attributes_count > 0) {
1500 parse_field_attributes(cfs,
1501 attributes_count,
1502 is_static,
1503 signature_index,
1504 &constantvalue_index,
1505 &is_synthetic,
1506 &generic_signature_index,
1507 &parsed_annotations,
1508 CHECK);
1509
1510 if (parsed_annotations.field_annotations() != NULL) {
1511 if (_fields_annotations == NULL) {
1512 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1513 _loader_data, length, NULL,
1514 CHECK);
1515 }
1516 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1517 parsed_annotations.set_field_annotations(NULL);
1518 }
1519 if (parsed_annotations.field_type_annotations() != NULL) {
1520 if (_fields_type_annotations == NULL) {
1521 _fields_type_annotations =
1522 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1523 length,
1524 NULL,
1525 CHECK);
1526 }
1527 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1528 parsed_annotations.set_field_type_annotations(NULL);
1529 }
1530
1531 if (is_synthetic) {
1532 access_flags.set_is_synthetic();
1533 }
1534 if (generic_signature_index != 0) {
1535 access_flags.set_field_has_generic_signature();
1536 fa[generic_signature_slot] = generic_signature_index;
1537 generic_signature_slot ++;
1538 num_generic_signature ++;
1539 }
1540 }
1541
1542 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1543 field->initialize(access_flags.as_short(),
1544 name_index,
1545 signature_index,
1546 constantvalue_index);
1547 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1548
1549 // Remember how many oops we encountered and compute allocation type
1550 const FieldAllocationType atype = fac->update(is_static, type);
1551 field->set_allocation_type(atype);
1552
1553 // After field is initialized with type, we can augment it with aux info
1554 if (parsed_annotations.has_any_annotations())
1555 parsed_annotations.apply_to(field);
1556 }
1557
1558 int index = length;
1559 if (num_injected != 0) {
1560 for (int n = 0; n < num_injected; n++) {
1561 // Check for duplicates
1562 if (injected[n].may_be_java) {
1563 const Symbol* const name = injected[n].name();
1564 const Symbol* const signature = injected[n].signature();
1565 bool duplicate = false;
1566 for (int i = 0; i < length; i++) {
1567 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1568 if (name == cp->symbol_at(f->name_index()) &&
1569 signature == cp->symbol_at(f->signature_index())) {
1570 // Symbol is desclared in Java so skip this one
1571 duplicate = true;
1572 break;
1573 }
1574 }
1575 if (duplicate) {
1576 // These will be removed from the field array at the end
1577 continue;
1578 }
1579 }
1580
1581 // Injected field
1582 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1583 field->initialize(JVM_ACC_FIELD_INTERNAL,
1584 injected[n].name_index,
1585 injected[n].signature_index,
1586 0);
1587
1588 const BasicType type = FieldType::basic_type(injected[n].signature());
1589
1590 // Remember how many oops we encountered and compute allocation type
1591 const FieldAllocationType atype = fac->update(false, type);
1592 field->set_allocation_type(atype);
1593 index++;
1594 }
1595 }
1596
1597 assert(NULL == _fields, "invariant");
1598
1599 _fields =
1600 MetadataFactory::new_array<u2>(_loader_data,
1601 index * FieldInfo::field_slots + num_generic_signature,
1602 CHECK);
1603 // Sometimes injected fields already exist in the Java source so
1604 // the fields array could be too long. In that case the
1605 // fields array is trimed. Also unused slots that were reserved
1606 // for generic signature indexes are discarded.
1607 {
1608 int i = 0;
1609 for (; i < index * FieldInfo::field_slots; i++) {
1610 _fields->at_put(i, fa[i]);
1611 }
1612 for (int j = total_fields * FieldInfo::field_slots;
1613 j < generic_signature_slot; j++) {
1614 _fields->at_put(i++, fa[j]);
1615 }
1616 assert(_fields->length() == i, "");
1617 }
1618
1619 if (_need_verify && length > 1) {
1620 // Check duplicated fields
1621 ResourceMark rm(THREAD);
1622 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1623 THREAD, NameSigHash*, HASH_ROW_SIZE);
1624 initialize_hashtable(names_and_sigs);
1625 bool dup = false;
1626 {
1627 debug_only(NoSafepointVerifier nsv;)
1628 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1629 const Symbol* const name = fs.name();
1630 const Symbol* const sig = fs.signature();
1631 // If no duplicates, add name/signature in hashtable names_and_sigs.
1632 if (!put_after_lookup(name, sig, names_and_sigs)) {
1633 dup = true;
1634 break;
1635 }
1636 }
1637 }
1638 if (dup) {
1639 classfile_parse_error("Duplicate field name&signature in class file %s",
1640 CHECK);
1641 }
1642 }
1643 }
1644
1645
1646 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) {
1647 while (length-- > 0) {
1648 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1649 }
1650 }
1651
1652 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1653 u4 code_length,
1654 u4 exception_table_length,
1655 TRAPS) {
1656 assert(cfs != NULL, "invariant");
1657
1658 const u2* const exception_table_start = cfs->get_u2_buffer();
1659 assert(exception_table_start != NULL, "null exception table");
1660
1661 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1662 // end_pc,
1663 // handler_pc,
1664 // catch_type_index
1665
1666 // Will check legal target after parsing code array in verifier.
1667 if (_need_verify) {
1668 for (unsigned int i = 0; i < exception_table_length; i++) {
1669 const u2 start_pc = cfs->get_u2_fast();
1670 const u2 end_pc = cfs->get_u2_fast();
1671 const u2 handler_pc = cfs->get_u2_fast();
1672 const u2 catch_type_index = cfs->get_u2_fast();
1673 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1674 "Illegal exception table range in class file %s",
1675 CHECK_NULL);
1676 guarantee_property(handler_pc < code_length,
1677 "Illegal exception table handler in class file %s",
1678 CHECK_NULL);
1679 if (catch_type_index != 0) {
1680 guarantee_property(valid_klass_reference_at(catch_type_index),
1681 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1682 }
1683 }
1684 } else {
1685 cfs->skip_u2_fast(exception_table_length * 4);
1686 }
1687 return exception_table_start;
1688 }
1689
1690 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1691 u4 code_length,
1692 CompressedLineNumberWriteStream**const write_stream,
1693 TRAPS) {
1694
1695 const ClassFileStream* const cfs = _stream;
1696 unsigned int num_entries = cfs->get_u2(CHECK);
1697
1698 // Each entry is a u2 start_pc, and a u2 line_number
1699 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1700
1701 // Verify line number attribute and table length
1702 check_property(
1703 code_attribute_length == sizeof(u2) + length_in_bytes,
1704 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1705
1706 cfs->guarantee_more(length_in_bytes, CHECK);
1707
1708 if ((*write_stream) == NULL) {
1709 if (length_in_bytes > fixed_buffer_size) {
1710 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1711 } else {
1712 (*write_stream) = new CompressedLineNumberWriteStream(
1713 _linenumbertable_buffer, fixed_buffer_size);
1714 }
1715 }
1716
1717 while (num_entries-- > 0) {
1718 const u2 bci = cfs->get_u2_fast(); // start_pc
1719 const u2 line = cfs->get_u2_fast(); // line_number
1720 guarantee_property(bci < code_length,
1721 "Invalid pc in LineNumberTable in class file %s", CHECK);
1722 (*write_stream)->write_pair(bci, line);
1723 }
1724 }
1725
1726
1727 class LVT_Hash : public AllStatic {
1728 public:
1729
1730 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1731 /*
1732 * 3-tuple start_bci/length/slot has to be unique key,
1733 * so the following comparison seems to be redundant:
1734 * && elem->name_cp_index == entry->_elem->name_cp_index
1735 */
1736 return (e0.start_bci == e1.start_bci &&
1737 e0.length == e1.length &&
1738 e0.name_cp_index == e1.name_cp_index &&
1739 e0.slot == e1.slot);
1740 }
1741
1742 static unsigned int hash(LocalVariableTableElement const& e0) {
1743 unsigned int raw_hash = e0.start_bci;
1744
1745 raw_hash = e0.length + raw_hash * 37;
1746 raw_hash = e0.name_cp_index + raw_hash * 37;
1747 raw_hash = e0.slot + raw_hash * 37;
1748
1749 return raw_hash;
1750 }
1751 };
1752
1753
1754 // Class file LocalVariableTable elements.
1755 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1756 public:
1757 u2 start_bci;
1758 u2 length;
1759 u2 name_cp_index;
1760 u2 descriptor_cp_index;
1761 u2 slot;
1762 };
1763
1764 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1765 LocalVariableTableElement* const lvt) {
1766 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1767 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1768 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1769 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1770 lvt->signature_cp_index = 0;
1771 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1772 }
1773
1774 // Function is used to parse both attributes:
1775 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1776 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1777 u4 code_length,
1778 u2 max_locals,
1779 u4 code_attribute_length,
1780 u2* const localvariable_table_length,
1781 bool isLVTT,
1782 TRAPS) {
1783 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1784 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1785 const unsigned int size =
1786 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1787
1788 const ConstantPool* const cp = _cp;
1789
1790 // Verify local variable table attribute has right length
1791 if (_need_verify) {
1792 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1793 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1794 }
1795
1796 const u2* const localvariable_table_start = cfs->get_u2_buffer();
1797 assert(localvariable_table_start != NULL, "null local variable table");
1798 if (!_need_verify) {
1799 cfs->skip_u2_fast(size);
1800 } else {
1801 cfs->guarantee_more(size * 2, CHECK_NULL);
1802 for(int i = 0; i < (*localvariable_table_length); i++) {
1803 const u2 start_pc = cfs->get_u2_fast();
1804 const u2 length = cfs->get_u2_fast();
1805 const u2 name_index = cfs->get_u2_fast();
1806 const u2 descriptor_index = cfs->get_u2_fast();
1807 const u2 index = cfs->get_u2_fast();
1808 // Assign to a u4 to avoid overflow
1809 const u4 end_pc = (u4)start_pc + (u4)length;
1810
1811 if (start_pc >= code_length) {
1812 classfile_parse_error(
1813 "Invalid start_pc %u in %s in class file %s",
1814 start_pc, tbl_name, CHECK_NULL);
1815 }
1816 if (end_pc > code_length) {
1817 classfile_parse_error(
1818 "Invalid length %u in %s in class file %s",
1819 length, tbl_name, CHECK_NULL);
1820 }
1821 const int cp_size = cp->length();
1822 guarantee_property(valid_symbol_at(name_index),
1823 "Name index %u in %s has bad constant type in class file %s",
1824 name_index, tbl_name, CHECK_NULL);
1825 guarantee_property(valid_symbol_at(descriptor_index),
1826 "Signature index %u in %s has bad constant type in class file %s",
1827 descriptor_index, tbl_name, CHECK_NULL);
1828
1829 const Symbol* const name = cp->symbol_at(name_index);
1830 const Symbol* const sig = cp->symbol_at(descriptor_index);
1831 verify_legal_field_name(name, CHECK_NULL);
1832 u2 extra_slot = 0;
1833 if (!isLVTT) {
1834 verify_legal_field_signature(name, sig, CHECK_NULL);
1835
1836 // 4894874: check special cases for double and long local variables
1837 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1838 sig == vmSymbols::type_signature(T_LONG)) {
1839 extra_slot = 1;
1840 }
1841 }
1842 guarantee_property((index + extra_slot) < max_locals,
1843 "Invalid index %u in %s in class file %s",
1844 index, tbl_name, CHECK_NULL);
1845 }
1846 }
1847 return localvariable_table_start;
1848 }
1849
1850
1851 void ClassFileParser::parse_type_array(u2 array_length,
1852 u4 code_length,
1853 u4* const u1_index,
1854 u4* const u2_index,
1855 u1* const u1_array,
1856 u2* const u2_array,
1857 TRAPS) {
1858 const ClassFileStream* const cfs = _stream;
1859 u2 index = 0; // index in the array with long/double occupying two slots
1860 u4 i1 = *u1_index;
1861 u4 i2 = *u2_index + 1;
1862 for(int i = 0; i < array_length; i++) {
1863 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1864 index++;
1865 if (tag == ITEM_Long || tag == ITEM_Double) {
1866 index++;
1867 } else if (tag == ITEM_Object) {
1868 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1869 guarantee_property(valid_klass_reference_at(class_index),
1870 "Bad class index %u in StackMap in class file %s",
1871 class_index, CHECK);
1872 } else if (tag == ITEM_Uninitialized) {
1873 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1874 guarantee_property(
1875 offset < code_length,
1876 "Bad uninitialized type offset %u in StackMap in class file %s",
1877 offset, CHECK);
1878 } else {
1879 guarantee_property(
1880 tag <= (u1)ITEM_Uninitialized,
1881 "Unknown variable type %u in StackMap in class file %s",
1882 tag, CHECK);
1883 }
1884 }
1885 u2_array[*u2_index] = index;
1886 *u1_index = i1;
1887 *u2_index = i2;
1888 }
1889
1890 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1891 u4 code_attribute_length,
1892 bool need_verify,
1893 TRAPS) {
1894 assert(cfs != NULL, "invariant");
1895
1896 if (0 == code_attribute_length) {
1897 return NULL;
1898 }
1899
1900 const u1* const stackmap_table_start = cfs->get_u1_buffer();
1901 assert(stackmap_table_start != NULL, "null stackmap table");
1902
1903 // check code_attribute_length first
1904 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1905
1906 if (!need_verify && !DumpSharedSpaces) {
1907 return NULL;
1908 }
1909 return stackmap_table_start;
1910 }
1911
1912 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1913 u2* const checked_exceptions_length,
1914 u4 method_attribute_length,
1915 TRAPS) {
1916 assert(cfs != NULL, "invariant");
1917 assert(checked_exceptions_length != NULL, "invariant");
1918
1919 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1920 *checked_exceptions_length = cfs->get_u2_fast();
1921 const unsigned int size =
1922 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1923 const u2* const checked_exceptions_start = cfs->get_u2_buffer();
1924 assert(checked_exceptions_start != NULL, "null checked exceptions");
1925 if (!_need_verify) {
1926 cfs->skip_u2_fast(size);
1927 } else {
1928 // Verify each value in the checked exception table
1929 u2 checked_exception;
1930 const u2 len = *checked_exceptions_length;
1931 cfs->guarantee_more(2 * len, CHECK_NULL);
1932 for (int i = 0; i < len; i++) {
1933 checked_exception = cfs->get_u2_fast();
1934 check_property(
1935 valid_klass_reference_at(checked_exception),
1936 "Exception name has bad type at constant pool %u in class file %s",
1937 checked_exception, CHECK_NULL);
1938 }
1939 }
1940 // check exceptions attribute length
1941 if (_need_verify) {
1942 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1943 sizeof(u2) * size),
1944 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1945 }
1946 return checked_exceptions_start;
1947 }
1948
1949 void ClassFileParser::throwIllegalSignature(const char* type,
1950 const Symbol* name,
1951 const Symbol* sig,
1952 TRAPS) const {
1953 assert(name != NULL, "invariant");
1954 assert(sig != NULL, "invariant");
1955
1956 ResourceMark rm(THREAD);
1957 Exceptions::fthrow(THREAD_AND_LOCATION,
1958 vmSymbols::java_lang_ClassFormatError(),
1959 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1960 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1961 }
1962
1963 AnnotationCollector::ID
1964 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1965 const Symbol* name) {
1966 const vmSymbols::SID sid = vmSymbols::find_sid(name);
1967 // Privileged code can use all annotations. Other code silently drops some.
1968 const bool privileged = loader_data->is_the_null_class_loader_data() ||
1969 loader_data->is_platform_class_loader_data() ||
1970 loader_data->is_anonymous();
1971 switch (sid) {
1972 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
1973 if (_location != _in_method) break; // only allow for methods
1974 if (!privileged) break; // only allow in privileged code
1975 return _method_CallerSensitive;
1976 }
1977 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1978 if (_location != _in_method) break; // only allow for methods
1979 if (!privileged) break; // only allow in privileged code
1980 return _method_ForceInline;
1981 }
1982 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
1983 if (_location != _in_method) break; // only allow for methods
1984 if (!privileged) break; // only allow in privileged code
1985 return _method_DontInline;
1986 }
1987 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1988 if (_location != _in_method) break; // only allow for methods
1989 if (!privileged) break; // only allow in privileged code
1990 return _method_InjectedProfile;
1991 }
1992 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
1993 if (_location != _in_method) break; // only allow for methods
1994 if (!privileged) break; // only allow in privileged code
1995 return _method_LambdaForm_Compiled;
1996 }
1997 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
1998 if (_location != _in_method) break; // only allow for methods
1999 if (!privileged) break; // only allow in privileged code
2000 return _method_LambdaForm_Hidden;
2001 }
2002 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2003 if (_location != _in_method) break; // only allow for methods
2004 if (!privileged) break; // only allow in privileged code
2005 return _method_HotSpotIntrinsicCandidate;
2006 }
2007 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2008 if (_location != _in_field) break; // only allow for fields
2009 if (!privileged) break; // only allow in privileged code
2010 return _field_Stable;
2011 }
2012 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2013 if (_location != _in_field && _location != _in_class) {
2014 break; // only allow for fields and classes
2015 }
2016 if (!EnableContended || (RestrictContended && !privileged)) {
2017 break; // honor privileges
2018 }
2019 return _jdk_internal_vm_annotation_Contended;
2020 }
2021 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2022 if (_location != _in_method) break; // only allow for methods
2023 if (RestrictReservedStack && !privileged) break; // honor privileges
2024 return _jdk_internal_vm_annotation_ReservedStackAccess;
2025 }
2026 default: {
2027 break;
2028 }
2029 }
2030 return AnnotationCollector::_unknown;
2031 }
2032
2033 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2034 if (is_contended())
2035 f->set_contended_group(contended_group());
2036 if (is_stable())
2037 f->set_stable(true);
2038 }
2039
2040 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2041 // If there's an error deallocate metadata for field annotations
2042 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2043 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2044 }
2045
2046 void MethodAnnotationCollector::apply_to(methodHandle m) {
2047 if (has_annotation(_method_CallerSensitive)) {
2048 m->set_caller_sensitive(true);
2049 // implicitly set force inline to force better usage of Reflection.getCallerClass intrinsic
2050 m->set_force_inline(true);
2051 }
2052 if (has_annotation(_method_ForceInline))
2053 m->set_force_inline(true);
2054 if (has_annotation(_method_DontInline))
2055 m->set_dont_inline(true);
2056 if (has_annotation(_method_InjectedProfile))
2057 m->set_has_injected_profile(true);
2058 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2059 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2060 if (has_annotation(_method_LambdaForm_Hidden))
2061 m->set_hidden(true);
2062 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2063 m->set_intrinsic_candidate(true);
2064 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2065 m->set_has_reserved_stack_access(true);
2066 }
2067
2068 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2069 assert(ik != NULL, "invariant");
2070 ik->set_is_contended(is_contended());
2071 }
2072
2073 #define MAX_ARGS_SIZE 255
2074 #define MAX_CODE_SIZE 65535
2075 #define INITIAL_MAX_LVT_NUMBER 256
2076
2077 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2078 *
2079 * Rules for LVT's and LVTT's are:
2080 * - There can be any number of LVT's and LVTT's.
2081 * - If there are n LVT's, it is the same as if there was just
2082 * one LVT containing all the entries from the n LVT's.
2083 * - There may be no more than one LVT entry per local variable.
2084 * Two LVT entries are 'equal' if these fields are the same:
2085 * start_pc, length, name, slot
2086 * - There may be no more than one LVTT entry per each LVT entry.
2087 * Each LVTT entry has to match some LVT entry.
2088 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2089 */
2090 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2091 int lvt_cnt,
2092 u2* const localvariable_table_length,
2093 const u2**const localvariable_table_start,
2094 int lvtt_cnt,
2095 u2* const localvariable_type_table_length,
2096 const u2**const localvariable_type_table_start,
2097 TRAPS) {
2098
2099 ResourceMark rm(THREAD);
2100
2101 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2102 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2103
2104 LVT_HashTable* const table = new LVT_HashTable();
2105
2106 // To fill LocalVariableTable in
2107 const Classfile_LVT_Element* cf_lvt;
2108 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2109
2110 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2111 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2112 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2113 copy_lvt_element(&cf_lvt[idx], lvt);
2114 // If no duplicates, add LVT elem in hashtable.
2115 if (table->put(*lvt, lvt) == false
2116 && _need_verify
2117 && _major_version >= JAVA_1_5_VERSION) {
2118 classfile_parse_error("Duplicated LocalVariableTable attribute "
2119 "entry for '%s' in class file %s",
2120 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2121 CHECK);
2122 }
2123 }
2124 }
2125
2126 // To merge LocalVariableTable and LocalVariableTypeTable
2127 const Classfile_LVT_Element* cf_lvtt;
2128 LocalVariableTableElement lvtt_elem;
2129
2130 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2131 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2132 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2133 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2134 LocalVariableTableElement** entry = table->get(lvtt_elem);
2135 if (entry == NULL) {
2136 if (_need_verify) {
2137 classfile_parse_error("LVTT entry for '%s' in class file %s "
2138 "does not match any LVT entry",
2139 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2140 CHECK);
2141 }
2142 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2143 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2144 "entry for '%s' in class file %s",
2145 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2146 CHECK);
2147 } else {
2148 // to add generic signatures into LocalVariableTable
2149 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2150 }
2151 }
2152 }
2153 }
2154
2155
2156 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2157 const u1* runtime_visible_annotations,
2158 int runtime_visible_annotations_length,
2159 const u1* runtime_invisible_annotations,
2160 int runtime_invisible_annotations_length,
2161 const u1* runtime_visible_parameter_annotations,
2162 int runtime_visible_parameter_annotations_length,
2163 const u1* runtime_invisible_parameter_annotations,
2164 int runtime_invisible_parameter_annotations_length,
2165 const u1* runtime_visible_type_annotations,
2166 int runtime_visible_type_annotations_length,
2167 const u1* runtime_invisible_type_annotations,
2168 int runtime_invisible_type_annotations_length,
2169 const u1* annotation_default,
2170 int annotation_default_length,
2171 TRAPS) {
2172
2173 AnnotationArray* a;
2174
2175 if (runtime_visible_annotations_length +
2176 runtime_invisible_annotations_length > 0) {
2177 a = assemble_annotations(runtime_visible_annotations,
2178 runtime_visible_annotations_length,
2179 runtime_invisible_annotations,
2180 runtime_invisible_annotations_length,
2181 CHECK);
2182 cm->set_method_annotations(a);
2183 }
2184
2185 if (runtime_visible_parameter_annotations_length +
2186 runtime_invisible_parameter_annotations_length > 0) {
2187 a = assemble_annotations(runtime_visible_parameter_annotations,
2188 runtime_visible_parameter_annotations_length,
2189 runtime_invisible_parameter_annotations,
2190 runtime_invisible_parameter_annotations_length,
2191 CHECK);
2192 cm->set_parameter_annotations(a);
2193 }
2194
2195 if (annotation_default_length > 0) {
2196 a = assemble_annotations(annotation_default,
2197 annotation_default_length,
2198 NULL,
2199 0,
2200 CHECK);
2201 cm->set_default_annotations(a);
2202 }
2203
2204 if (runtime_visible_type_annotations_length +
2205 runtime_invisible_type_annotations_length > 0) {
2206 a = assemble_annotations(runtime_visible_type_annotations,
2207 runtime_visible_type_annotations_length,
2208 runtime_invisible_type_annotations,
2209 runtime_invisible_type_annotations_length,
2210 CHECK);
2211 cm->set_type_annotations(a);
2212 }
2213 }
2214
2215
2216 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2217 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2218 // Method* to save footprint, so we only know the size of the resulting Method* when the
2219 // entire method attribute is parsed.
2220 //
2221 // The promoted_flags parameter is used to pass relevant access_flags
2222 // from the method back up to the containing klass. These flag values
2223 // are added to klass's access_flags.
2224
2225 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2226 bool is_interface,
2227 const ConstantPool* cp,
2228 AccessFlags* const promoted_flags,
2229 TRAPS) {
2230 assert(cfs != NULL, "invariant");
2231 assert(cp != NULL, "invariant");
2232 assert(promoted_flags != NULL, "invariant");
2233
2234 ResourceMark rm(THREAD);
2235 // Parse fixed parts:
2236 // access_flags, name_index, descriptor_index, attributes_count
2237 cfs->guarantee_more(8, CHECK_NULL);
2238
2239 int flags = cfs->get_u2_fast();
2240 const u2 name_index = cfs->get_u2_fast();
2241 const int cp_size = cp->length();
2242 check_property(
2243 valid_symbol_at(name_index),
2244 "Illegal constant pool index %u for method name in class file %s",
2245 name_index, CHECK_NULL);
2246 const Symbol* const name = cp->symbol_at(name_index);
2247 verify_legal_method_name(name, CHECK_NULL);
2248
2249 const u2 signature_index = cfs->get_u2_fast();
2250 guarantee_property(
2251 valid_symbol_at(signature_index),
2252 "Illegal constant pool index %u for method signature in class file %s",
2253 signature_index, CHECK_NULL);
2254 const Symbol* const signature = cp->symbol_at(signature_index);
2255
2256 if (name == vmSymbols::class_initializer_name()) {
2257 // We ignore the other access flags for a valid class initializer.
2258 // (JVM Spec 2nd ed., chapter 4.6)
2259 if (_major_version < 51) { // backward compatibility
2260 flags = JVM_ACC_STATIC;
2261 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2262 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2263 } else {
2264 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2265 }
2266 } else {
2267 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2268 }
2269
2270 if (name == vmSymbols::object_initializer_name() && is_interface) {
2271 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2272 }
2273
2274 int args_size = -1; // only used when _need_verify is true
2275 if (_need_verify) {
2276 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2277 verify_legal_method_signature(name, signature, CHECK_NULL);
2278 if (args_size > MAX_ARGS_SIZE) {
2279 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2280 }
2281 }
2282
2283 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2284
2285 // Default values for code and exceptions attribute elements
2286 u2 max_stack = 0;
2287 u2 max_locals = 0;
2288 u4 code_length = 0;
2289 const u1* code_start = 0;
2290 u2 exception_table_length = 0;
2291 const u2* exception_table_start = NULL;
2292 Array<int>* exception_handlers = Universe::the_empty_int_array();
2293 u2 checked_exceptions_length = 0;
2294 const u2* checked_exceptions_start = NULL;
2295 CompressedLineNumberWriteStream* linenumber_table = NULL;
2296 int linenumber_table_length = 0;
2297 int total_lvt_length = 0;
2298 u2 lvt_cnt = 0;
2299 u2 lvtt_cnt = 0;
2300 bool lvt_allocated = false;
2301 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2302 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2303 u2* localvariable_table_length = NULL;
2304 const u2** localvariable_table_start = NULL;
2305 u2* localvariable_type_table_length = NULL;
2306 const u2** localvariable_type_table_start = NULL;
2307 int method_parameters_length = -1;
2308 const u1* method_parameters_data = NULL;
2309 bool method_parameters_seen = false;
2310 bool parsed_code_attribute = false;
2311 bool parsed_checked_exceptions_attribute = false;
2312 bool parsed_stackmap_attribute = false;
2313 // stackmap attribute - JDK1.5
2314 const u1* stackmap_data = NULL;
2315 int stackmap_data_length = 0;
2316 u2 generic_signature_index = 0;
2317 MethodAnnotationCollector parsed_annotations;
2318 const u1* runtime_visible_annotations = NULL;
2319 int runtime_visible_annotations_length = 0;
2320 const u1* runtime_invisible_annotations = NULL;
2321 int runtime_invisible_annotations_length = 0;
2322 const u1* runtime_visible_parameter_annotations = NULL;
2323 int runtime_visible_parameter_annotations_length = 0;
2324 const u1* runtime_invisible_parameter_annotations = NULL;
2325 int runtime_invisible_parameter_annotations_length = 0;
2326 const u1* runtime_visible_type_annotations = NULL;
2327 int runtime_visible_type_annotations_length = 0;
2328 const u1* runtime_invisible_type_annotations = NULL;
2329 int runtime_invisible_type_annotations_length = 0;
2330 bool runtime_invisible_annotations_exists = false;
2331 bool runtime_invisible_type_annotations_exists = false;
2332 bool runtime_invisible_parameter_annotations_exists = false;
2333 const u1* annotation_default = NULL;
2334 int annotation_default_length = 0;
2335
2336 // Parse code and exceptions attribute
2337 u2 method_attributes_count = cfs->get_u2_fast();
2338 while (method_attributes_count--) {
2339 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2340 const u2 method_attribute_name_index = cfs->get_u2_fast();
2341 const u4 method_attribute_length = cfs->get_u4_fast();
2342 check_property(
2343 valid_symbol_at(method_attribute_name_index),
2344 "Invalid method attribute name index %u in class file %s",
2345 method_attribute_name_index, CHECK_NULL);
2346
2347 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2348 if (method_attribute_name == vmSymbols::tag_code()) {
2349 // Parse Code attribute
2350 if (_need_verify) {
2351 guarantee_property(
2352 !access_flags.is_native() && !access_flags.is_abstract(),
2353 "Code attribute in native or abstract methods in class file %s",
2354 CHECK_NULL);
2355 }
2356 if (parsed_code_attribute) {
2357 classfile_parse_error("Multiple Code attributes in class file %s",
2358 CHECK_NULL);
2359 }
2360 parsed_code_attribute = true;
2361
2362 // Stack size, locals size, and code size
2363 if (_major_version == 45 && _minor_version <= 2) {
2364 cfs->guarantee_more(4, CHECK_NULL);
2365 max_stack = cfs->get_u1_fast();
2366 max_locals = cfs->get_u1_fast();
2367 code_length = cfs->get_u2_fast();
2368 } else {
2369 cfs->guarantee_more(8, CHECK_NULL);
2370 max_stack = cfs->get_u2_fast();
2371 max_locals = cfs->get_u2_fast();
2372 code_length = cfs->get_u4_fast();
2373 }
2374 if (_need_verify) {
2375 guarantee_property(args_size <= max_locals,
2376 "Arguments can't fit into locals in class file %s",
2377 CHECK_NULL);
2378 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2379 "Invalid method Code length %u in class file %s",
2380 code_length, CHECK_NULL);
2381 }
2382 // Code pointer
2383 code_start = cfs->get_u1_buffer();
2384 assert(code_start != NULL, "null code start");
2385 cfs->guarantee_more(code_length, CHECK_NULL);
2386 cfs->skip_u1_fast(code_length);
2387
2388 // Exception handler table
2389 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2390 exception_table_length = cfs->get_u2_fast();
2391 if (exception_table_length > 0) {
2392 exception_table_start = parse_exception_table(cfs,
2393 code_length,
2394 exception_table_length,
2395 CHECK_NULL);
2396 }
2397
2398 // Parse additional attributes in code attribute
2399 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2400 u2 code_attributes_count = cfs->get_u2_fast();
2401
2402 unsigned int calculated_attribute_length = 0;
2403
2404 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2405 calculated_attribute_length =
2406 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2407 } else {
2408 // max_stack, locals and length are smaller in pre-version 45.2 classes
2409 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2410 }
2411 calculated_attribute_length +=
2412 code_length +
2413 sizeof(exception_table_length) +
2414 sizeof(code_attributes_count) +
2415 exception_table_length *
2416 ( sizeof(u2) + // start_pc
2417 sizeof(u2) + // end_pc
2418 sizeof(u2) + // handler_pc
2419 sizeof(u2) ); // catch_type_index
2420
2421 while (code_attributes_count--) {
2422 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2423 const u2 code_attribute_name_index = cfs->get_u2_fast();
2424 const u4 code_attribute_length = cfs->get_u4_fast();
2425 calculated_attribute_length += code_attribute_length +
2426 sizeof(code_attribute_name_index) +
2427 sizeof(code_attribute_length);
2428 check_property(valid_symbol_at(code_attribute_name_index),
2429 "Invalid code attribute name index %u in class file %s",
2430 code_attribute_name_index,
2431 CHECK_NULL);
2432 if (LoadLineNumberTables &&
2433 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2434 // Parse and compress line number table
2435 parse_linenumber_table(code_attribute_length,
2436 code_length,
2437 &linenumber_table,
2438 CHECK_NULL);
2439
2440 } else if (LoadLocalVariableTables &&
2441 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2442 // Parse local variable table
2443 if (!lvt_allocated) {
2444 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2445 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2446 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2447 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2448 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2449 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2450 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2451 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2452 lvt_allocated = true;
2453 }
2454 if (lvt_cnt == max_lvt_cnt) {
2455 max_lvt_cnt <<= 1;
2456 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2457 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2458 }
2459 localvariable_table_start[lvt_cnt] =
2460 parse_localvariable_table(cfs,
2461 code_length,
2462 max_locals,
2463 code_attribute_length,
2464 &localvariable_table_length[lvt_cnt],
2465 false, // is not LVTT
2466 CHECK_NULL);
2467 total_lvt_length += localvariable_table_length[lvt_cnt];
2468 lvt_cnt++;
2469 } else if (LoadLocalVariableTypeTables &&
2470 _major_version >= JAVA_1_5_VERSION &&
2471 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2472 if (!lvt_allocated) {
2473 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2474 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2475 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2476 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2477 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2478 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2479 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2480 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2481 lvt_allocated = true;
2482 }
2483 // Parse local variable type table
2484 if (lvtt_cnt == max_lvtt_cnt) {
2485 max_lvtt_cnt <<= 1;
2486 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2487 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2488 }
2489 localvariable_type_table_start[lvtt_cnt] =
2490 parse_localvariable_table(cfs,
2491 code_length,
2492 max_locals,
2493 code_attribute_length,
2494 &localvariable_type_table_length[lvtt_cnt],
2495 true, // is LVTT
2496 CHECK_NULL);
2497 lvtt_cnt++;
2498 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2499 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2500 // Stack map is only needed by the new verifier in JDK1.5.
2501 if (parsed_stackmap_attribute) {
2502 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2503 }
2504 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2505 stackmap_data_length = code_attribute_length;
2506 parsed_stackmap_attribute = true;
2507 } else {
2508 // Skip unknown attributes
2509 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2510 }
2511 }
2512 // check method attribute length
2513 if (_need_verify) {
2514 guarantee_property(method_attribute_length == calculated_attribute_length,
2515 "Code segment has wrong length in class file %s",
2516 CHECK_NULL);
2517 }
2518 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2519 // Parse Exceptions attribute
2520 if (parsed_checked_exceptions_attribute) {
2521 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2522 CHECK_NULL);
2523 }
2524 parsed_checked_exceptions_attribute = true;
2525 checked_exceptions_start =
2526 parse_checked_exceptions(cfs,
2527 &checked_exceptions_length,
2528 method_attribute_length,
2529 CHECK_NULL);
2530 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2531 // reject multiple method parameters
2532 if (method_parameters_seen) {
2533 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2534 CHECK_NULL);
2535 }
2536 method_parameters_seen = true;
2537 method_parameters_length = cfs->get_u1_fast();
2538 const u2 real_length = (method_parameters_length * 4u) + 1u;
2539 if (method_attribute_length != real_length) {
2540 classfile_parse_error(
2541 "Invalid MethodParameters method attribute length %u in class file",
2542 method_attribute_length, CHECK_NULL);
2543 }
2544 method_parameters_data = cfs->get_u1_buffer();
2545 cfs->skip_u2_fast(method_parameters_length);
2546 cfs->skip_u2_fast(method_parameters_length);
2547 // ignore this attribute if it cannot be reflected
2548 if (!SystemDictionary::Parameter_klass_loaded())
2549 method_parameters_length = -1;
2550 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2551 if (method_attribute_length != 0) {
2552 classfile_parse_error(
2553 "Invalid Synthetic method attribute length %u in class file %s",
2554 method_attribute_length, CHECK_NULL);
2555 }
2556 // Should we check that there hasn't already been a synthetic attribute?
2557 access_flags.set_is_synthetic();
2558 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2559 if (method_attribute_length != 0) {
2560 classfile_parse_error(
2561 "Invalid Deprecated method attribute length %u in class file %s",
2562 method_attribute_length, CHECK_NULL);
2563 }
2564 } else if (_major_version >= JAVA_1_5_VERSION) {
2565 if (method_attribute_name == vmSymbols::tag_signature()) {
2566 if (method_attribute_length != 2) {
2567 classfile_parse_error(
2568 "Invalid Signature attribute length %u in class file %s",
2569 method_attribute_length, CHECK_NULL);
2570 }
2571 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2572 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2573 if (runtime_visible_annotations != NULL) {
2574 classfile_parse_error(
2575 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2576 CHECK_NULL);
2577 }
2578 runtime_visible_annotations_length = method_attribute_length;
2579 runtime_visible_annotations = cfs->get_u1_buffer();
2580 assert(runtime_visible_annotations != NULL, "null visible annotations");
2581 parse_annotations(cp,
2582 runtime_visible_annotations,
2583 runtime_visible_annotations_length,
2584 &parsed_annotations,
2585 _loader_data,
2586 CHECK_NULL);
2587 cfs->skip_u1(runtime_visible_annotations_length, CHECK_NULL);
2588 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2589 if (runtime_invisible_annotations_exists) {
2590 classfile_parse_error(
2591 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2592 CHECK_NULL);
2593 }
2594 runtime_invisible_annotations_exists = true;
2595 if (PreserveAllAnnotations) {
2596 runtime_invisible_annotations_length = method_attribute_length;
2597 runtime_invisible_annotations = cfs->get_u1_buffer();
2598 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2599 }
2600 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2601 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2602 if (runtime_visible_parameter_annotations != NULL) {
2603 classfile_parse_error(
2604 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2605 CHECK_NULL);
2606 }
2607 runtime_visible_parameter_annotations_length = method_attribute_length;
2608 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2609 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2610 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2611 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2612 if (runtime_invisible_parameter_annotations_exists) {
2613 classfile_parse_error(
2614 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2615 CHECK_NULL);
2616 }
2617 runtime_invisible_parameter_annotations_exists = true;
2618 if (PreserveAllAnnotations) {
2619 runtime_invisible_parameter_annotations_length = method_attribute_length;
2620 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2621 assert(runtime_invisible_parameter_annotations != NULL,
2622 "null invisible parameter annotations");
2623 }
2624 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2625 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2626 if (annotation_default != NULL) {
2627 classfile_parse_error(
2628 "Multiple AnnotationDefault attributes for method in class file %s",
2629 CHECK_NULL);
2630 }
2631 annotation_default_length = method_attribute_length;
2632 annotation_default = cfs->get_u1_buffer();
2633 assert(annotation_default != NULL, "null annotation default");
2634 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2635 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2636 if (runtime_visible_type_annotations != NULL) {
2637 classfile_parse_error(
2638 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2639 CHECK_NULL);
2640 }
2641 runtime_visible_type_annotations_length = method_attribute_length;
2642 runtime_visible_type_annotations = cfs->get_u1_buffer();
2643 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2644 // No need for the VM to parse Type annotations
2645 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2646 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2647 if (runtime_invisible_type_annotations_exists) {
2648 classfile_parse_error(
2649 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2650 CHECK_NULL);
2651 } else {
2652 runtime_invisible_type_annotations_exists = true;
2653 }
2654 if (PreserveAllAnnotations) {
2655 runtime_invisible_type_annotations_length = method_attribute_length;
2656 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2657 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2658 }
2659 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2660 } else {
2661 // Skip unknown attributes
2662 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2663 }
2664 } else {
2665 // Skip unknown attributes
2666 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2667 }
2668 }
2669
2670 if (linenumber_table != NULL) {
2671 linenumber_table->write_terminator();
2672 linenumber_table_length = linenumber_table->position();
2673 }
2674
2675 // Make sure there's at least one Code attribute in non-native/non-abstract method
2676 if (_need_verify) {
2677 guarantee_property(access_flags.is_native() ||
2678 access_flags.is_abstract() ||
2679 parsed_code_attribute,
2680 "Absent Code attribute in method that is not native or abstract in class file %s",
2681 CHECK_NULL);
2682 }
2683
2684 // All sizing information for a Method* is finally available, now create it
2685 InlineTableSizes sizes(
2686 total_lvt_length,
2687 linenumber_table_length,
2688 exception_table_length,
2689 checked_exceptions_length,
2690 method_parameters_length,
2691 generic_signature_index,
2692 runtime_visible_annotations_length +
2693 runtime_invisible_annotations_length,
2694 runtime_visible_parameter_annotations_length +
2695 runtime_invisible_parameter_annotations_length,
2696 runtime_visible_type_annotations_length +
2697 runtime_invisible_type_annotations_length,
2698 annotation_default_length,
2699 0);
2700
2701 Method* const m = Method::allocate(_loader_data,
2702 code_length,
2703 access_flags,
2704 &sizes,
2705 ConstMethod::NORMAL,
2706 CHECK_NULL);
2707
2708 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2709
2710 // Fill in information from fixed part (access_flags already set)
2711 m->set_constants(_cp);
2712 m->set_name_index(name_index);
2713 m->set_signature_index(signature_index);
2714
2715 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2716 m->constMethod()->set_result_type(rtf.type());
2717
2718 if (args_size >= 0) {
2719 m->set_size_of_parameters(args_size);
2720 } else {
2721 m->compute_size_of_parameters(THREAD);
2722 }
2723 #ifdef ASSERT
2724 if (args_size >= 0) {
2725 m->compute_size_of_parameters(THREAD);
2726 assert(args_size == m->size_of_parameters(), "");
2727 }
2728 #endif
2729
2730 // Fill in code attribute information
2731 m->set_max_stack(max_stack);
2732 m->set_max_locals(max_locals);
2733 if (stackmap_data != NULL) {
2734 m->constMethod()->copy_stackmap_data(_loader_data,
2735 (u1*)stackmap_data,
2736 stackmap_data_length,
2737 CHECK_NULL);
2738 }
2739
2740 // Copy byte codes
2741 m->set_code((u1*)code_start);
2742
2743 // Copy line number table
2744 if (linenumber_table != NULL) {
2745 memcpy(m->compressed_linenumber_table(),
2746 linenumber_table->buffer(),
2747 linenumber_table_length);
2748 }
2749
2750 // Copy exception table
2751 if (exception_table_length > 0) {
2752 int size =
2753 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2754 copy_u2_with_conversion((u2*) m->exception_table_start(),
2755 exception_table_start, size);
2756 }
2757
2758 // Copy method parameters
2759 if (method_parameters_length > 0) {
2760 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2761 for (int i = 0; i < method_parameters_length; i++) {
2762 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2763 method_parameters_data += 2;
2764 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2765 method_parameters_data += 2;
2766 }
2767 }
2768
2769 // Copy checked exceptions
2770 if (checked_exceptions_length > 0) {
2771 const int size =
2772 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2773 copy_u2_with_conversion((u2*) m->checked_exceptions_start(),
2774 checked_exceptions_start,
2775 size);
2776 }
2777
2778 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2779 if (total_lvt_length > 0) {
2780 promoted_flags->set_has_localvariable_table();
2781 copy_localvariable_table(m->constMethod(),
2782 lvt_cnt,
2783 localvariable_table_length,
2784 localvariable_table_start,
2785 lvtt_cnt,
2786 localvariable_type_table_length,
2787 localvariable_type_table_start,
2788 CHECK_NULL);
2789 }
2790
2791 if (parsed_annotations.has_any_annotations())
2792 parsed_annotations.apply_to(m);
2793
2794 // Copy annotations
2795 copy_method_annotations(m->constMethod(),
2796 runtime_visible_annotations,
2797 runtime_visible_annotations_length,
2798 runtime_invisible_annotations,
2799 runtime_invisible_annotations_length,
2800 runtime_visible_parameter_annotations,
2801 runtime_visible_parameter_annotations_length,
2802 runtime_invisible_parameter_annotations,
2803 runtime_invisible_parameter_annotations_length,
2804 runtime_visible_type_annotations,
2805 runtime_visible_type_annotations_length,
2806 runtime_invisible_type_annotations,
2807 runtime_invisible_type_annotations_length,
2808 annotation_default,
2809 annotation_default_length,
2810 CHECK_NULL);
2811
2812 if (name == vmSymbols::finalize_method_name() &&
2813 signature == vmSymbols::void_method_signature()) {
2814 if (m->is_empty_method()) {
2815 _has_empty_finalizer = true;
2816 } else {
2817 _has_finalizer = true;
2818 }
2819 }
2820 if (name == vmSymbols::object_initializer_name() &&
2821 signature == vmSymbols::void_method_signature() &&
2822 m->is_vanilla_constructor()) {
2823 _has_vanilla_constructor = true;
2824 }
2825
2826 NOT_PRODUCT(m->verify());
2827 return m;
2828 }
2829
2830
2831 // The promoted_flags parameter is used to pass relevant access_flags
2832 // from the methods back up to the containing klass. These flag values
2833 // are added to klass's access_flags.
2834 // Side-effects: populates the _methods field in the parser
2835 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2836 bool is_interface,
2837 AccessFlags* promoted_flags,
2838 bool* has_final_method,
2839 bool* declares_default_methods,
2840 TRAPS) {
2841 assert(cfs != NULL, "invariant");
2842 assert(promoted_flags != NULL, "invariant");
2843 assert(has_final_method != NULL, "invariant");
2844 assert(declares_default_methods != NULL, "invariant");
2845
2846 assert(NULL == _methods, "invariant");
2847
2848 cfs->guarantee_more(2, CHECK); // length
2849 const u2 length = cfs->get_u2_fast();
2850 if (length == 0) {
2851 _methods = Universe::the_empty_method_array();
2852 } else {
2853 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2854 length,
2855 NULL,
2856 CHECK);
2857
2858 HandleMark hm(THREAD);
2859 for (int index = 0; index < length; index++) {
2860 Method* method = parse_method(cfs,
2861 is_interface,
2862 _cp,
2863 promoted_flags,
2864 CHECK);
2865
2866 if (method->is_final()) {
2867 *has_final_method = true;
2868 }
2869 // declares_default_methods: declares concrete instance methods, any access flags
2870 // used for interface initialization, and default method inheritance analysis
2871 if (is_interface && !(*declares_default_methods)
2872 && !method->is_abstract() && !method->is_static()) {
2873 *declares_default_methods = true;
2874 }
2875 _methods->at_put(index, method);
2876 }
2877
2878 if (_need_verify && length > 1) {
2879 // Check duplicated methods
2880 ResourceMark rm(THREAD);
2881 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2882 THREAD, NameSigHash*, HASH_ROW_SIZE);
2883 initialize_hashtable(names_and_sigs);
2884 bool dup = false;
2885 {
2886 debug_only(NoSafepointVerifier nsv;)
2887 for (int i = 0; i < length; i++) {
2888 const Method* const m = _methods->at(i);
2889 // If no duplicates, add name/signature in hashtable names_and_sigs.
2890 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2891 dup = true;
2892 break;
2893 }
2894 }
2895 }
2896 if (dup) {
2897 classfile_parse_error("Duplicate method name&signature in class file %s",
2898 CHECK);
2899 }
2900 }
2901 }
2902 }
2903
2904 static const intArray* sort_methods(Array<Method*>* methods) {
2905 const int length = methods->length();
2906 // If JVMTI original method ordering or sharing is enabled we have to
2907 // remember the original class file ordering.
2908 // We temporarily use the vtable_index field in the Method* to store the
2909 // class file index, so we can read in after calling qsort.
2910 // Put the method ordering in the shared archive.
2911 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2912 for (int index = 0; index < length; index++) {
2913 Method* const m = methods->at(index);
2914 assert(!m->valid_vtable_index(), "vtable index should not be set");
2915 m->set_vtable_index(index);
2916 }
2917 }
2918 // Sort method array by ascending method name (for faster lookups & vtable construction)
2919 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2920 Method::sort_methods(methods);
2921
2922 intArray* method_ordering = NULL;
2923 // If JVMTI original method ordering or sharing is enabled construct int
2924 // array remembering the original ordering
2925 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2926 method_ordering = new intArray(length, length, -1);
2927 for (int index = 0; index < length; index++) {
2928 Method* const m = methods->at(index);
2929 const int old_index = m->vtable_index();
2930 assert(old_index >= 0 && old_index < length, "invalid method index");
2931 method_ordering->at_put(index, old_index);
2932 m->set_vtable_index(Method::invalid_vtable_index);
2933 }
2934 }
2935 return method_ordering;
2936 }
2937
2938 // Parse generic_signature attribute for methods and fields
2939 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2940 TRAPS) {
2941 assert(cfs != NULL, "invariant");
2942
2943 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2944 const u2 generic_signature_index = cfs->get_u2_fast();
2945 check_property(
2946 valid_symbol_at(generic_signature_index),
2947 "Invalid Signature attribute at constant pool index %u in class file %s",
2948 generic_signature_index, CHECK_0);
2949 return generic_signature_index;
2950 }
2951
2952 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2953 TRAPS) {
2954
2955 assert(cfs != NULL, "invariant");
2956
2957 cfs->guarantee_more(2, CHECK); // sourcefile_index
2958 const u2 sourcefile_index = cfs->get_u2_fast();
2959 check_property(
2960 valid_symbol_at(sourcefile_index),
2961 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2962 sourcefile_index, CHECK);
2963 set_class_sourcefile_index(sourcefile_index);
2964 }
2965
2966 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2967 int length,
2968 TRAPS) {
2969 assert(cfs != NULL, "invariant");
2970
2971 const u1* const sde_buffer = cfs->get_u1_buffer();
2972 assert(sde_buffer != NULL, "null sde buffer");
2973
2974 // Don't bother storing it if there is no way to retrieve it
2975 if (JvmtiExport::can_get_source_debug_extension()) {
2976 assert((length+1) > length, "Overflow checking");
2977 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2978 for (int i = 0; i < length; i++) {
2979 sde[i] = sde_buffer[i];
2980 }
2981 sde[length] = '\0';
2982 set_class_sde_buffer((const char*)sde, length);
2983 }
2984 // Got utf8 string, set stream position forward
2985 cfs->skip_u1(length, CHECK);
2986 }
2987
2988
2989 // Inner classes can be static, private or protected (classic VM does this)
2990 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
2991 JVM_ACC_PRIVATE | \
2992 JVM_ACC_PROTECTED | \
2993 JVM_ACC_STATIC \
2994 )
2995
2996 // Return number of classes in the inner classes attribute table
2997 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
2998 const u1* const inner_classes_attribute_start,
2999 bool parsed_enclosingmethod_attribute,
3000 u2 enclosing_method_class_index,
3001 u2 enclosing_method_method_index,
3002 TRAPS) {
3003 const u1* const current_mark = cfs->current();
3004 u2 length = 0;
3005 if (inner_classes_attribute_start != NULL) {
3006 cfs->set_current(inner_classes_attribute_start);
3007 cfs->guarantee_more(2, CHECK_0); // length
3008 length = cfs->get_u2_fast();
3009 }
3010
3011 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3012 // method data:
3013 // [inner_class_info_index,
3014 // outer_class_info_index,
3015 // inner_name_index,
3016 // inner_class_access_flags,
3017 // ...
3018 // enclosing_method_class_index,
3019 // enclosing_method_method_index]
3020 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3021 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3022 _inner_classes = inner_classes;
3023
3024 int index = 0;
3025 const int cp_size = _cp->length();
3026 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3027 for (int n = 0; n < length; n++) {
3028 // Inner class index
3029 const u2 inner_class_info_index = cfs->get_u2_fast();
3030 check_property(
3031 valid_klass_reference_at(inner_class_info_index),
3032 "inner_class_info_index %u has bad constant type in class file %s",
3033 inner_class_info_index, CHECK_0);
3034 // Outer class index
3035 const u2 outer_class_info_index = cfs->get_u2_fast();
3036 check_property(
3037 outer_class_info_index == 0 ||
3038 valid_klass_reference_at(outer_class_info_index),
3039 "outer_class_info_index %u has bad constant type in class file %s",
3040 outer_class_info_index, CHECK_0);
3041 // Inner class name
3042 const u2 inner_name_index = cfs->get_u2_fast();
3043 check_property(
3044 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3045 "inner_name_index %u has bad constant type in class file %s",
3046 inner_name_index, CHECK_0);
3047 if (_need_verify) {
3048 guarantee_property(inner_class_info_index != outer_class_info_index,
3049 "Class is both outer and inner class in class file %s", CHECK_0);
3050 }
3051 // Access flags
3052 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3053 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3054 // Set abstract bit for old class files for backward compatibility
3055 flags |= JVM_ACC_ABSTRACT;
3056 }
3057 verify_legal_class_modifiers(flags, CHECK_0);
3058 AccessFlags inner_access_flags(flags);
3059
3060 inner_classes->at_put(index++, inner_class_info_index);
3061 inner_classes->at_put(index++, outer_class_info_index);
3062 inner_classes->at_put(index++, inner_name_index);
3063 inner_classes->at_put(index++, inner_access_flags.as_short());
3064 }
3065
3066 // 4347400: make sure there's no duplicate entry in the classes array
3067 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3068 for(int i = 0; i < length * 4; i += 4) {
3069 for(int j = i + 4; j < length * 4; j += 4) {
3070 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3071 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3072 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3073 inner_classes->at(i+3) != inner_classes->at(j+3)),
3074 "Duplicate entry in InnerClasses in class file %s",
3075 CHECK_0);
3076 }
3077 }
3078 }
3079
3080 // Set EnclosingMethod class and method indexes.
3081 if (parsed_enclosingmethod_attribute) {
3082 inner_classes->at_put(index++, enclosing_method_class_index);
3083 inner_classes->at_put(index++, enclosing_method_method_index);
3084 }
3085 assert(index == size, "wrong size");
3086
3087 // Restore buffer's current position.
3088 cfs->set_current(current_mark);
3089
3090 return length;
3091 }
3092
3093 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3094 set_class_synthetic_flag(true);
3095 }
3096
3097 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3098 assert(cfs != NULL, "invariant");
3099
3100 const u2 signature_index = cfs->get_u2(CHECK);
3101 check_property(
3102 valid_symbol_at(signature_index),
3103 "Invalid constant pool index %u in Signature attribute in class file %s",
3104 signature_index, CHECK);
3105 set_class_generic_signature_index(signature_index);
3106 }
3107
3108 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3109 ConstantPool* cp,
3110 u4 attribute_byte_length,
3111 TRAPS) {
3112 assert(cfs != NULL, "invariant");
3113 assert(cp != NULL, "invariant");
3114
3115 const u1* const current_start = cfs->current();
3116
3117 guarantee_property(attribute_byte_length >= sizeof(u2),
3118 "Invalid BootstrapMethods attribute length %u in class file %s",
3119 attribute_byte_length,
3120 CHECK);
3121
3122 cfs->guarantee_more(attribute_byte_length, CHECK);
3123
3124 const int attribute_array_length = cfs->get_u2_fast();
3125
3126 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3127 "Short length on BootstrapMethods in class file %s",
3128 CHECK);
3129
3130
3131 // The attribute contains a counted array of counted tuples of shorts,
3132 // represending bootstrap specifiers:
3133 // length*{bootstrap_method_index, argument_count*{argument_index}}
3134 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3135 // operand_count = number of shorts in attr, except for leading length
3136
3137 // The attribute is copied into a short[] array.
3138 // The array begins with a series of short[2] pairs, one for each tuple.
3139 const int index_size = (attribute_array_length * 2);
3140
3141 Array<u2>* const operands =
3142 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3143
3144 // Eagerly assign operands so they will be deallocated with the constant
3145 // pool if there is an error.
3146 cp->set_operands(operands);
3147
3148 int operand_fill_index = index_size;
3149 const int cp_size = cp->length();
3150
3151 for (int n = 0; n < attribute_array_length; n++) {
3152 // Store a 32-bit offset into the header of the operand array.
3153 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3154
3155 // Read a bootstrap specifier.
3156 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3157 const u2 bootstrap_method_index = cfs->get_u2_fast();
3158 const u2 argument_count = cfs->get_u2_fast();
3159 check_property(
3160 valid_cp_range(bootstrap_method_index, cp_size) &&
3161 cp->tag_at(bootstrap_method_index).is_method_handle(),
3162 "bootstrap_method_index %u has bad constant type in class file %s",
3163 bootstrap_method_index,
3164 CHECK);
3165
3166 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3167 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3168 CHECK);
3169
3170 operands->at_put(operand_fill_index++, bootstrap_method_index);
3171 operands->at_put(operand_fill_index++, argument_count);
3172
3173 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3174 for (int j = 0; j < argument_count; j++) {
3175 const u2 argument_index = cfs->get_u2_fast();
3176 check_property(
3177 valid_cp_range(argument_index, cp_size) &&
3178 cp->tag_at(argument_index).is_loadable_constant(),
3179 "argument_index %u has bad constant type in class file %s",
3180 argument_index,
3181 CHECK);
3182 operands->at_put(operand_fill_index++, argument_index);
3183 }
3184 }
3185 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3186 "Bad length on BootstrapMethods in class file %s",
3187 CHECK);
3188 }
3189
3190 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3191 ConstantPool* cp,
3192 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3193 TRAPS) {
3194 assert(cfs != NULL, "invariant");
3195 assert(cp != NULL, "invariant");
3196 assert(parsed_annotations != NULL, "invariant");
3197
3198 // Set inner classes attribute to default sentinel
3199 _inner_classes = Universe::the_empty_short_array();
3200 cfs->guarantee_more(2, CHECK); // attributes_count
3201 u2 attributes_count = cfs->get_u2_fast();
3202 bool parsed_sourcefile_attribute = false;
3203 bool parsed_innerclasses_attribute = false;
3204 bool parsed_enclosingmethod_attribute = false;
3205 bool parsed_bootstrap_methods_attribute = false;
3206 const u1* runtime_visible_annotations = NULL;
3207 int runtime_visible_annotations_length = 0;
3208 const u1* runtime_invisible_annotations = NULL;
3209 int runtime_invisible_annotations_length = 0;
3210 const u1* runtime_visible_type_annotations = NULL;
3211 int runtime_visible_type_annotations_length = 0;
3212 const u1* runtime_invisible_type_annotations = NULL;
3213 int runtime_invisible_type_annotations_length = 0;
3214 bool runtime_invisible_type_annotations_exists = false;
3215 bool runtime_invisible_annotations_exists = false;
3216 bool parsed_source_debug_ext_annotations_exist = false;
3217 const u1* inner_classes_attribute_start = NULL;
3218 u4 inner_classes_attribute_length = 0;
3219 u2 enclosing_method_class_index = 0;
3220 u2 enclosing_method_method_index = 0;
3221 // Iterate over attributes
3222 while (attributes_count--) {
3223 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3224 const u2 attribute_name_index = cfs->get_u2_fast();
3225 const u4 attribute_length = cfs->get_u4_fast();
3226 check_property(
3227 valid_symbol_at(attribute_name_index),
3228 "Attribute name has bad constant pool index %u in class file %s",
3229 attribute_name_index, CHECK);
3230 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3231 if (tag == vmSymbols::tag_source_file()) {
3232 // Check for SourceFile tag
3233 if (_need_verify) {
3234 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3235 }
3236 if (parsed_sourcefile_attribute) {
3237 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3238 } else {
3239 parsed_sourcefile_attribute = true;
3240 }
3241 parse_classfile_sourcefile_attribute(cfs, CHECK);
3242 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3243 // Check for SourceDebugExtension tag
3244 if (parsed_source_debug_ext_annotations_exist) {
3245 classfile_parse_error(
3246 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3247 }
3248 parsed_source_debug_ext_annotations_exist = true;
3249 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3250 } else if (tag == vmSymbols::tag_inner_classes()) {
3251 // Check for InnerClasses tag
3252 if (parsed_innerclasses_attribute) {
3253 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3254 } else {
3255 parsed_innerclasses_attribute = true;
3256 }
3257 inner_classes_attribute_start = cfs->get_u1_buffer();
3258 inner_classes_attribute_length = attribute_length;
3259 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3260 } else if (tag == vmSymbols::tag_synthetic()) {
3261 // Check for Synthetic tag
3262 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3263 if (attribute_length != 0) {
3264 classfile_parse_error(
3265 "Invalid Synthetic classfile attribute length %u in class file %s",
3266 attribute_length, CHECK);
3267 }
3268 parse_classfile_synthetic_attribute(CHECK);
3269 } else if (tag == vmSymbols::tag_deprecated()) {
3270 // Check for Deprecatd tag - 4276120
3271 if (attribute_length != 0) {
3272 classfile_parse_error(
3273 "Invalid Deprecated classfile attribute length %u in class file %s",
3274 attribute_length, CHECK);
3275 }
3276 } else if (_major_version >= JAVA_1_5_VERSION) {
3277 if (tag == vmSymbols::tag_signature()) {
3278 if (attribute_length != 2) {
3279 classfile_parse_error(
3280 "Wrong Signature attribute length %u in class file %s",
3281 attribute_length, CHECK);
3282 }
3283 parse_classfile_signature_attribute(cfs, CHECK);
3284 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3285 if (runtime_visible_annotations != NULL) {
3286 classfile_parse_error(
3287 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3288 }
3289 runtime_visible_annotations_length = attribute_length;
3290 runtime_visible_annotations = cfs->get_u1_buffer();
3291 assert(runtime_visible_annotations != NULL, "null visible annotations");
3292 parse_annotations(cp,
3293 runtime_visible_annotations,
3294 runtime_visible_annotations_length,
3295 parsed_annotations,
3296 _loader_data,
3297 CHECK);
3298 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
3299 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3300 if (runtime_invisible_annotations_exists) {
3301 classfile_parse_error(
3302 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3303 }
3304 runtime_invisible_annotations_exists = true;
3305 if (PreserveAllAnnotations) {
3306 runtime_invisible_annotations_length = attribute_length;
3307 runtime_invisible_annotations = cfs->get_u1_buffer();
3308 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3309 }
3310 cfs->skip_u1(attribute_length, CHECK);
3311 } else if (tag == vmSymbols::tag_enclosing_method()) {
3312 if (parsed_enclosingmethod_attribute) {
3313 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3314 } else {
3315 parsed_enclosingmethod_attribute = true;
3316 }
3317 guarantee_property(attribute_length == 4,
3318 "Wrong EnclosingMethod attribute length %u in class file %s",
3319 attribute_length, CHECK);
3320 cfs->guarantee_more(4, CHECK); // class_index, method_index
3321 enclosing_method_class_index = cfs->get_u2_fast();
3322 enclosing_method_method_index = cfs->get_u2_fast();
3323 if (enclosing_method_class_index == 0) {
3324 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3325 }
3326 // Validate the constant pool indices and types
3327 check_property(valid_klass_reference_at(enclosing_method_class_index),
3328 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3329 if (enclosing_method_method_index != 0 &&
3330 (!cp->is_within_bounds(enclosing_method_method_index) ||
3331 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3332 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3333 }
3334 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3335 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3336 if (parsed_bootstrap_methods_attribute) {
3337 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3338 }
3339 parsed_bootstrap_methods_attribute = true;
3340 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3341 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3342 if (runtime_visible_type_annotations != NULL) {
3343 classfile_parse_error(
3344 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3345 }
3346 runtime_visible_type_annotations_length = attribute_length;
3347 runtime_visible_type_annotations = cfs->get_u1_buffer();
3348 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3349 // No need for the VM to parse Type annotations
3350 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3351 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3352 if (runtime_invisible_type_annotations_exists) {
3353 classfile_parse_error(
3354 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3355 } else {
3356 runtime_invisible_type_annotations_exists = true;
3357 }
3358 if (PreserveAllAnnotations) {
3359 runtime_invisible_type_annotations_length = attribute_length;
3360 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3361 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3362 }
3363 cfs->skip_u1(attribute_length, CHECK);
3364 } else {
3365 // Unknown attribute
3366 cfs->skip_u1(attribute_length, CHECK);
3367 }
3368 } else {
3369 // Unknown attribute
3370 cfs->skip_u1(attribute_length, CHECK);
3371 }
3372 }
3373 _annotations = assemble_annotations(runtime_visible_annotations,
3374 runtime_visible_annotations_length,
3375 runtime_invisible_annotations,
3376 runtime_invisible_annotations_length,
3377 CHECK);
3378 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3379 runtime_visible_type_annotations_length,
3380 runtime_invisible_type_annotations,
3381 runtime_invisible_type_annotations_length,
3382 CHECK);
3383
3384 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3385 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3386 cfs,
3387 inner_classes_attribute_start,
3388 parsed_innerclasses_attribute,
3389 enclosing_method_class_index,
3390 enclosing_method_method_index,
3391 CHECK);
3392 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3393 guarantee_property(
3394 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3395 "Wrong InnerClasses attribute length in class file %s", CHECK);
3396 }
3397 }
3398
3399 if (_max_bootstrap_specifier_index >= 0) {
3400 guarantee_property(parsed_bootstrap_methods_attribute,
3401 "Missing BootstrapMethods attribute in class file %s", CHECK);
3402 }
3403 }
3404
3405 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3406 assert(k != NULL, "invariant");
3407
3408 if (_synthetic_flag)
3409 k->set_is_synthetic();
3410 if (_sourcefile_index != 0) {
3411 k->set_source_file_name_index(_sourcefile_index);
3412 }
3413 if (_generic_signature_index != 0) {
3414 k->set_generic_signature_index(_generic_signature_index);
3415 }
3416 if (_sde_buffer != NULL) {
3417 k->set_source_debug_extension(_sde_buffer, _sde_length);
3418 }
3419 }
3420
3421 // Create the Annotations object that will
3422 // hold the annotations array for the Klass.
3423 void ClassFileParser::create_combined_annotations(TRAPS) {
3424 if (_annotations == NULL &&
3425 _type_annotations == NULL &&
3426 _fields_annotations == NULL &&
3427 _fields_type_annotations == NULL) {
3428 // Don't create the Annotations object unnecessarily.
3429 return;
3430 }
3431
3432 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3433 annotations->set_class_annotations(_annotations);
3434 annotations->set_class_type_annotations(_type_annotations);
3435 annotations->set_fields_annotations(_fields_annotations);
3436 annotations->set_fields_type_annotations(_fields_type_annotations);
3437
3438 // This is the Annotations object that will be
3439 // assigned to InstanceKlass being constructed.
3440 _combined_annotations = annotations;
3441
3442 // The annotations arrays below has been transfered the
3443 // _combined_annotations so these fields can now be cleared.
3444 _annotations = NULL;
3445 _type_annotations = NULL;
3446 _fields_annotations = NULL;
3447 _fields_type_annotations = NULL;
3448 }
3449
3450 // Transfer ownership of metadata allocated to the InstanceKlass.
3451 void ClassFileParser::apply_parsed_class_metadata(
3452 InstanceKlass* this_klass,
3453 int java_fields_count, TRAPS) {
3454 assert(this_klass != NULL, "invariant");
3455
3456 _cp->set_pool_holder(this_klass);
3457 this_klass->set_constants(_cp);
3458 this_klass->set_fields(_fields, java_fields_count);
3459 this_klass->set_methods(_methods);
3460 this_klass->set_inner_classes(_inner_classes);
3461 this_klass->set_local_interfaces(_local_interfaces);
3462 this_klass->set_transitive_interfaces(_transitive_interfaces);
3463 this_klass->set_annotations(_combined_annotations);
3464
3465 // Clear out these fields so they don't get deallocated by the destructor
3466 clear_class_metadata();
3467 }
3468
3469 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3470 int runtime_visible_annotations_length,
3471 const u1* const runtime_invisible_annotations,
3472 int runtime_invisible_annotations_length,
3473 TRAPS) {
3474 AnnotationArray* annotations = NULL;
3475 if (runtime_visible_annotations != NULL ||
3476 runtime_invisible_annotations != NULL) {
3477 annotations = MetadataFactory::new_array<u1>(_loader_data,
3478 runtime_visible_annotations_length +
3479 runtime_invisible_annotations_length,
3480 CHECK_(annotations));
3481 if (runtime_visible_annotations != NULL) {
3482 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3483 annotations->at_put(i, runtime_visible_annotations[i]);
3484 }
3485 }
3486 if (runtime_invisible_annotations != NULL) {
3487 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3488 int append = runtime_visible_annotations_length+i;
3489 annotations->at_put(append, runtime_invisible_annotations[i]);
3490 }
3491 }
3492 }
3493 return annotations;
3494 }
3495
3496 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3497 const int super_class_index,
3498 const bool need_verify,
3499 TRAPS) {
3500 assert(cp != NULL, "invariant");
3501 const InstanceKlass* super_klass = NULL;
3502
3503 if (super_class_index == 0) {
3504 check_property(_class_name == vmSymbols::java_lang_Object(),
3505 "Invalid superclass index %u in class file %s",
3506 super_class_index,
3507 CHECK_NULL);
3508 } else {
3509 check_property(valid_klass_reference_at(super_class_index),
3510 "Invalid superclass index %u in class file %s",
3511 super_class_index,
3512 CHECK_NULL);
3513 // The class name should be legal because it is checked when parsing constant pool.
3514 // However, make sure it is not an array type.
3515 bool is_array = false;
3516 if (cp->tag_at(super_class_index).is_klass()) {
3517 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3518 if (need_verify)
3519 is_array = super_klass->is_array_klass();
3520 } else if (need_verify) {
3521 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3522 }
3523 if (need_verify) {
3524 guarantee_property(!is_array,
3525 "Bad superclass name in class file %s", CHECK_NULL);
3526 }
3527 }
3528 return super_klass;
3529 }
3530
3531 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3532 unsigned int nonstatic_oop_map_count,
3533 int first_nonstatic_oop_offset) {
3534
3535 unsigned int map_count =
3536 NULL == super ? 0 : super->nonstatic_oop_map_count();
3537 if (nonstatic_oop_map_count > 0) {
3538 // We have oops to add to map
3539 if (map_count == 0) {
3540 map_count = nonstatic_oop_map_count;
3541 }
3542 else {
3543 // Check whether we should add a new map block or whether the last one can
3544 // be extended
3545 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3546 const OopMapBlock* const last_map = first_map + map_count - 1;
3547
3548 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3549 if (next_offset == first_nonstatic_oop_offset) {
3550 // There is no gap bettwen superklass's last oop field and first
3551 // local oop field, merge maps.
3552 nonstatic_oop_map_count -= 1;
3553 }
3554 else {
3555 // Superklass didn't end with a oop field, add extra maps
3556 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3557 }
3558 map_count += nonstatic_oop_map_count;
3559 }
3560 }
3561 return map_count;
3562 }
3563
3564 #ifndef PRODUCT
3565 static void print_field_layout(const Symbol* name,
3566 Array<u2>* fields,
3567 constantPoolHandle cp,
3568 int instance_size,
3569 int instance_fields_start,
3570 int instance_fields_end,
3571 int static_fields_end) {
3572
3573 assert(name != NULL, "invariant");
3574
3575 tty->print("%s: field layout\n", name->as_klass_external_name());
3576 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3577 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3578 if (!fs.access_flags().is_static()) {
3579 tty->print(" @%3d \"%s\" %s\n",
3580 fs.offset(),
3581 fs.name()->as_klass_external_name(),
3582 fs.signature()->as_klass_external_name());
3583 }
3584 }
3585 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3586 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3587 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3588 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3589 if (fs.access_flags().is_static()) {
3590 tty->print(" @%3d \"%s\" %s\n",
3591 fs.offset(),
3592 fs.name()->as_klass_external_name(),
3593 fs.signature()->as_klass_external_name());
3594 }
3595 }
3596 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3597 tty->print("\n");
3598 }
3599 #endif
3600
3601 // Values needed for oopmap and InstanceKlass creation
3602 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3603 public:
3604 int* nonstatic_oop_offsets;
3605 unsigned int* nonstatic_oop_counts;
3606 unsigned int nonstatic_oop_map_count;
3607 unsigned int total_oop_map_count;
3608 int instance_size;
3609 int nonstatic_field_size;
3610 int static_field_size;
3611 bool has_nonstatic_fields;
3612 };
3613
3614 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3615 void ClassFileParser::layout_fields(ConstantPool* cp,
3616 const FieldAllocationCount* fac,
3617 const ClassAnnotationCollector* parsed_annotations,
3618 FieldLayoutInfo* info,
3619 TRAPS) {
3620
3621 assert(cp != NULL, "invariant");
3622
3623 // Field size and offset computation
3624 int nonstatic_field_size = _super_klass == NULL ? 0 :
3625 _super_klass->nonstatic_field_size();
3626
3627 // Count the contended fields by type.
3628 //
3629 // We ignore static fields, because @Contended is not supported for them.
3630 // The layout code below will also ignore the static fields.
3631 int nonstatic_contended_count = 0;
3632 FieldAllocationCount fac_contended;
3633 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3634 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3635 if (fs.is_contended()) {
3636 fac_contended.count[atype]++;
3637 if (!fs.access_flags().is_static()) {
3638 nonstatic_contended_count++;
3639 }
3640 }
3641 }
3642
3643
3644 // Calculate the starting byte offsets
3645 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3646 int next_static_double_offset = next_static_oop_offset +
3647 ((fac->count[STATIC_OOP]) * heapOopSize);
3648 if ( fac->count[STATIC_DOUBLE] &&
3649 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3650 Universe::field_type_should_be_aligned(T_LONG)) ) {
3651 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3652 }
3653
3654 int next_static_word_offset = next_static_double_offset +
3655 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3656 int next_static_short_offset = next_static_word_offset +
3657 ((fac->count[STATIC_WORD]) * BytesPerInt);
3658 int next_static_byte_offset = next_static_short_offset +
3659 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3660
3661 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3662 nonstatic_field_size * heapOopSize;
3663
3664 int next_nonstatic_field_offset = nonstatic_fields_start;
3665
3666 const bool is_contended_class = parsed_annotations->is_contended();
3667
3668 // Class is contended, pad before all the fields
3669 if (is_contended_class) {
3670 next_nonstatic_field_offset += ContendedPaddingWidth;
3671 }
3672
3673 // Compute the non-contended fields count.
3674 // The packing code below relies on these counts to determine if some field
3675 // can be squeezed into the alignment gap. Contended fields are obviously
3676 // exempt from that.
3677 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3678 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3679 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3680 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3681 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3682
3683 // Total non-static fields count, including every contended field
3684 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3685 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3686 fac->count[NONSTATIC_OOP];
3687
3688 const bool super_has_nonstatic_fields =
3689 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3690 const bool has_nonstatic_fields =
3691 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3692
3693
3694 // Prepare list of oops for oop map generation.
3695 //
3696 // "offset" and "count" lists are describing the set of contiguous oop
3697 // regions. offset[i] is the start of the i-th region, which then has
3698 // count[i] oops following. Before we know how many regions are required,
3699 // we pessimistically allocate the maps to fit all the oops into the
3700 // distinct regions.
3701 //
3702 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3703 // to figure out if we still need to do this.
3704 unsigned int nonstatic_oop_map_count = 0;
3705 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3706
3707 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3708 THREAD, int, max_nonstatic_oop_maps);
3709 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3710 THREAD, unsigned int, max_nonstatic_oop_maps);
3711
3712 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3713
3714 bool compact_fields = CompactFields;
3715 int allocation_style = FieldsAllocationStyle;
3716 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3717 assert(false, "0 <= FieldsAllocationStyle <= 2");
3718 allocation_style = 1; // Optimistic
3719 }
3720
3721 // The next classes have predefined hard-coded fields offsets
3722 // (see in JavaClasses::compute_hard_coded_offsets()).
3723 // Use default fields allocation order for them.
3724 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3725 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3726 _class_name == vmSymbols::java_lang_Class() ||
3727 _class_name == vmSymbols::java_lang_ClassLoader() ||
3728 _class_name == vmSymbols::java_lang_ref_Reference() ||
3729 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3730 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3731 _class_name == vmSymbols::java_lang_String() ||
3732 _class_name == vmSymbols::java_lang_Throwable() ||
3733 _class_name == vmSymbols::java_lang_Boolean() ||
3734 _class_name == vmSymbols::java_lang_Character() ||
3735 _class_name == vmSymbols::java_lang_Float() ||
3736 _class_name == vmSymbols::java_lang_Double() ||
3737 _class_name == vmSymbols::java_lang_Byte() ||
3738 _class_name == vmSymbols::java_lang_Short() ||
3739 _class_name == vmSymbols::java_lang_Integer() ||
3740 _class_name == vmSymbols::java_lang_Long())) {
3741 allocation_style = 0; // Allocate oops first
3742 compact_fields = false; // Don't compact fields
3743 }
3744
3745 int next_nonstatic_oop_offset = 0;
3746 int next_nonstatic_double_offset = 0;
3747
3748 // Rearrange fields for a given allocation style
3749 if( allocation_style == 0 ) {
3750 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3751 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3752 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3753 (nonstatic_oop_count * heapOopSize);
3754 } else if( allocation_style == 1 ) {
3755 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3756 next_nonstatic_double_offset = next_nonstatic_field_offset;
3757 } else if( allocation_style == 2 ) {
3758 // Fields allocation: oops fields in super and sub classes are together.
3759 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3760 _super_klass->nonstatic_oop_map_size() > 0 ) {
3761 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3762 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3763 const OopMapBlock* const last_map = first_map + map_count - 1;
3764 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3765 if (next_offset == next_nonstatic_field_offset) {
3766 allocation_style = 0; // allocate oops first
3767 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3768 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3769 (nonstatic_oop_count * heapOopSize);
3770 }
3771 }
3772 if( allocation_style == 2 ) {
3773 allocation_style = 1; // allocate oops last
3774 next_nonstatic_double_offset = next_nonstatic_field_offset;
3775 }
3776 } else {
3777 ShouldNotReachHere();
3778 }
3779
3780 int nonstatic_oop_space_count = 0;
3781 int nonstatic_word_space_count = 0;
3782 int nonstatic_short_space_count = 0;
3783 int nonstatic_byte_space_count = 0;
3784 int nonstatic_oop_space_offset = 0;
3785 int nonstatic_word_space_offset = 0;
3786 int nonstatic_short_space_offset = 0;
3787 int nonstatic_byte_space_offset = 0;
3788
3789 // Try to squeeze some of the fields into the gaps due to
3790 // long/double alignment.
3791 if (nonstatic_double_count > 0) {
3792 int offset = next_nonstatic_double_offset;
3793 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3794 if (compact_fields && offset != next_nonstatic_double_offset) {
3795 // Allocate available fields into the gap before double field.
3796 int length = next_nonstatic_double_offset - offset;
3797 assert(length == BytesPerInt, "");
3798 nonstatic_word_space_offset = offset;
3799 if (nonstatic_word_count > 0) {
3800 nonstatic_word_count -= 1;
3801 nonstatic_word_space_count = 1; // Only one will fit
3802 length -= BytesPerInt;
3803 offset += BytesPerInt;
3804 }
3805 nonstatic_short_space_offset = offset;
3806 while (length >= BytesPerShort && nonstatic_short_count > 0) {
3807 nonstatic_short_count -= 1;
3808 nonstatic_short_space_count += 1;
3809 length -= BytesPerShort;
3810 offset += BytesPerShort;
3811 }
3812 nonstatic_byte_space_offset = offset;
3813 while (length > 0 && nonstatic_byte_count > 0) {
3814 nonstatic_byte_count -= 1;
3815 nonstatic_byte_space_count += 1;
3816 length -= 1;
3817 }
3818 // Allocate oop field in the gap if there are no other fields for that.
3819 nonstatic_oop_space_offset = offset;
3820 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3821 allocation_style != 0) { // when oop fields not first
3822 nonstatic_oop_count -= 1;
3823 nonstatic_oop_space_count = 1; // Only one will fit
3824 length -= heapOopSize;
3825 offset += heapOopSize;
3826 }
3827 }
3828 }
3829
3830 int next_nonstatic_word_offset = next_nonstatic_double_offset +
3831 (nonstatic_double_count * BytesPerLong);
3832 int next_nonstatic_short_offset = next_nonstatic_word_offset +
3833 (nonstatic_word_count * BytesPerInt);
3834 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3835 (nonstatic_short_count * BytesPerShort);
3836 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3837 nonstatic_byte_count;
3838
3839 // let oops jump before padding with this allocation style
3840 if( allocation_style == 1 ) {
3841 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3842 if( nonstatic_oop_count > 0 ) {
3843 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3844 }
3845 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3846 }
3847
3848 // Iterate over fields again and compute correct offsets.
3849 // The field allocation type was temporarily stored in the offset slot.
3850 // oop fields are located before non-oop fields (static and non-static).
3851 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3852
3853 // skip already laid out fields
3854 if (fs.is_offset_set()) continue;
3855
3856 // contended instance fields are handled below
3857 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3858
3859 int real_offset = 0;
3860 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3861
3862 // pack the rest of the fields
3863 switch (atype) {
3864 case STATIC_OOP:
3865 real_offset = next_static_oop_offset;
3866 next_static_oop_offset += heapOopSize;
3867 break;
3868 case STATIC_BYTE:
3869 real_offset = next_static_byte_offset;
3870 next_static_byte_offset += 1;
3871 break;
3872 case STATIC_SHORT:
3873 real_offset = next_static_short_offset;
3874 next_static_short_offset += BytesPerShort;
3875 break;
3876 case STATIC_WORD:
3877 real_offset = next_static_word_offset;
3878 next_static_word_offset += BytesPerInt;
3879 break;
3880 case STATIC_DOUBLE:
3881 real_offset = next_static_double_offset;
3882 next_static_double_offset += BytesPerLong;
3883 break;
3884 case NONSTATIC_OOP:
3885 if( nonstatic_oop_space_count > 0 ) {
3886 real_offset = nonstatic_oop_space_offset;
3887 nonstatic_oop_space_offset += heapOopSize;
3888 nonstatic_oop_space_count -= 1;
3889 } else {
3890 real_offset = next_nonstatic_oop_offset;
3891 next_nonstatic_oop_offset += heapOopSize;
3892 }
3893
3894 // Record this oop in the oop maps
3895 if( nonstatic_oop_map_count > 0 &&
3896 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3897 real_offset -
3898 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3899 heapOopSize ) {
3900 // This oop is adjacent to the previous one, add to current oop map
3901 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3902 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3903 } else {
3904 // This oop is not adjacent to the previous one, create new oop map
3905 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3906 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3907 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3908 nonstatic_oop_map_count += 1;
3909 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3910 first_nonstatic_oop_offset = real_offset;
3911 }
3912 }
3913 break;
3914 case NONSTATIC_BYTE:
3915 if( nonstatic_byte_space_count > 0 ) {
3916 real_offset = nonstatic_byte_space_offset;
3917 nonstatic_byte_space_offset += 1;
3918 nonstatic_byte_space_count -= 1;
3919 } else {
3920 real_offset = next_nonstatic_byte_offset;
3921 next_nonstatic_byte_offset += 1;
3922 }
3923 break;
3924 case NONSTATIC_SHORT:
3925 if( nonstatic_short_space_count > 0 ) {
3926 real_offset = nonstatic_short_space_offset;
3927 nonstatic_short_space_offset += BytesPerShort;
3928 nonstatic_short_space_count -= 1;
3929 } else {
3930 real_offset = next_nonstatic_short_offset;
3931 next_nonstatic_short_offset += BytesPerShort;
3932 }
3933 break;
3934 case NONSTATIC_WORD:
3935 if( nonstatic_word_space_count > 0 ) {
3936 real_offset = nonstatic_word_space_offset;
3937 nonstatic_word_space_offset += BytesPerInt;
3938 nonstatic_word_space_count -= 1;
3939 } else {
3940 real_offset = next_nonstatic_word_offset;
3941 next_nonstatic_word_offset += BytesPerInt;
3942 }
3943 break;
3944 case NONSTATIC_DOUBLE:
3945 real_offset = next_nonstatic_double_offset;
3946 next_nonstatic_double_offset += BytesPerLong;
3947 break;
3948 default:
3949 ShouldNotReachHere();
3950 }
3951 fs.set_offset(real_offset);
3952 }
3953
3954
3955 // Handle the contended cases.
3956 //
3957 // Each contended field should not intersect the cache line with another contended field.
3958 // In the absence of alignment information, we end up with pessimistically separating
3959 // the fields with full-width padding.
3960 //
3961 // Additionally, this should not break alignment for the fields, so we round the alignment up
3962 // for each field.
3963 if (nonstatic_contended_count > 0) {
3964
3965 // if there is at least one contended field, we need to have pre-padding for them
3966 next_nonstatic_padded_offset += ContendedPaddingWidth;
3967
3968 // collect all contended groups
3969 ResourceBitMap bm(cp->size());
3970 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3971 // skip already laid out fields
3972 if (fs.is_offset_set()) continue;
3973
3974 if (fs.is_contended()) {
3975 bm.set_bit(fs.contended_group());
3976 }
3977 }
3978
3979 int current_group = -1;
3980 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3981
3982 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3983
3984 // skip already laid out fields
3985 if (fs.is_offset_set()) continue;
3986
3987 // skip non-contended fields and fields from different group
3988 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3989
3990 // handle statics below
3991 if (fs.access_flags().is_static()) continue;
3992
3993 int real_offset = 0;
3994 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3995
3996 switch (atype) {
3997 case NONSTATIC_BYTE:
3998 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
3999 real_offset = next_nonstatic_padded_offset;
4000 next_nonstatic_padded_offset += 1;
4001 break;
4002
4003 case NONSTATIC_SHORT:
4004 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
4005 real_offset = next_nonstatic_padded_offset;
4006 next_nonstatic_padded_offset += BytesPerShort;
4007 break;
4008
4009 case NONSTATIC_WORD:
4010 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4011 real_offset = next_nonstatic_padded_offset;
4012 next_nonstatic_padded_offset += BytesPerInt;
4013 break;
4014
4015 case NONSTATIC_DOUBLE:
4016 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4017 real_offset = next_nonstatic_padded_offset;
4018 next_nonstatic_padded_offset += BytesPerLong;
4019 break;
4020
4021 case NONSTATIC_OOP:
4022 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4023 real_offset = next_nonstatic_padded_offset;
4024 next_nonstatic_padded_offset += heapOopSize;
4025
4026 // Record this oop in the oop maps
4027 if( nonstatic_oop_map_count > 0 &&
4028 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4029 real_offset -
4030 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4031 heapOopSize ) {
4032 // This oop is adjacent to the previous one, add to current oop map
4033 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4034 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4035 } else {
4036 // This oop is not adjacent to the previous one, create new oop map
4037 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4038 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4039 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4040 nonstatic_oop_map_count += 1;
4041 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4042 first_nonstatic_oop_offset = real_offset;
4043 }
4044 }
4045 break;
4046
4047 default:
4048 ShouldNotReachHere();
4049 }
4050
4051 if (fs.contended_group() == 0) {
4052 // Contended group defines the equivalence class over the fields:
4053 // the fields within the same contended group are not inter-padded.
4054 // The only exception is default group, which does not incur the
4055 // equivalence, and so requires intra-padding.
4056 next_nonstatic_padded_offset += ContendedPaddingWidth;
4057 }
4058
4059 fs.set_offset(real_offset);
4060 } // for
4061
4062 // Start laying out the next group.
4063 // Note that this will effectively pad the last group in the back;
4064 // this is expected to alleviate memory contention effects for
4065 // subclass fields and/or adjacent object.
4066 // If this was the default group, the padding is already in place.
4067 if (current_group != 0) {
4068 next_nonstatic_padded_offset += ContendedPaddingWidth;
4069 }
4070 }
4071
4072 // handle static fields
4073 }
4074
4075 // Entire class is contended, pad in the back.
4076 // This helps to alleviate memory contention effects for subclass fields
4077 // and/or adjacent object.
4078 if (is_contended_class) {
4079 next_nonstatic_padded_offset += ContendedPaddingWidth;
4080 }
4081
4082 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4083
4084 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
4085 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4086 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
4087
4088 int static_field_size = (static_fields_end -
4089 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4090 nonstatic_field_size = nonstatic_field_size +
4091 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4092
4093 int instance_size = align_object_size(instance_end / wordSize);
4094
4095 assert(instance_size == align_object_size(align_size_up(
4096 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4097 wordSize) / wordSize), "consistent layout helper value");
4098
4099 // Invariant: nonstatic_field end/start should only change if there are
4100 // nonstatic fields in the class, or if the class is contended. We compare
4101 // against the non-aligned value, so that end alignment will not fail the
4102 // assert without actually having the fields.
4103 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4104 is_contended_class ||
4105 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4106
4107 // Number of non-static oop map blocks allocated at end of klass.
4108 const unsigned int total_oop_map_count =
4109 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4110 first_nonstatic_oop_offset);
4111
4112 #ifndef PRODUCT
4113 if (PrintFieldLayout) {
4114 print_field_layout(_class_name,
4115 _fields,
4116 cp,
4117 instance_size,
4118 nonstatic_fields_start,
4119 nonstatic_fields_end,
4120 static_fields_end);
4121 }
4122
4123 #endif
4124 // Pass back information needed for InstanceKlass creation
4125 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4126 info->nonstatic_oop_counts = nonstatic_oop_counts;
4127 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4128 info->total_oop_map_count = total_oop_map_count;
4129 info->instance_size = instance_size;
4130 info->static_field_size = static_field_size;
4131 info->nonstatic_field_size = nonstatic_field_size;
4132 info->has_nonstatic_fields = has_nonstatic_fields;
4133 }
4134
4135 static void fill_oop_maps(const InstanceKlass* k,
4136 unsigned int nonstatic_oop_map_count,
4137 const int* nonstatic_oop_offsets,
4138 const unsigned int* nonstatic_oop_counts) {
4139
4140 assert(k != NULL, "invariant");
4141
4142 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4143 const InstanceKlass* const super = k->superklass();
4144 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4145 if (super_count > 0) {
4146 // Copy maps from superklass
4147 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4148 for (unsigned int i = 0; i < super_count; ++i) {
4149 *this_oop_map++ = *super_oop_map++;
4150 }
4151 }
4152
4153 if (nonstatic_oop_map_count > 0) {
4154 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4155 // The counts differ because there is no gap between superklass's last oop
4156 // field and the first local oop field. Extend the last oop map copied
4157 // from the superklass instead of creating new one.
4158 nonstatic_oop_map_count--;
4159 nonstatic_oop_offsets++;
4160 this_oop_map--;
4161 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4162 this_oop_map++;
4163 }
4164
4165 // Add new map blocks, fill them
4166 while (nonstatic_oop_map_count-- > 0) {
4167 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4168 this_oop_map->set_count(*nonstatic_oop_counts++);
4169 this_oop_map++;
4170 }
4171 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4172 this_oop_map, "sanity");
4173 }
4174 }
4175
4176
4177 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4178 assert(ik != NULL, "invariant");
4179
4180 const Klass* const super = ik->super();
4181
4182 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4183 // in which case we don't have to register objects as finalizable
4184 if (!_has_empty_finalizer) {
4185 if (_has_finalizer ||
4186 (super != NULL && super->has_finalizer())) {
4187 ik->set_has_finalizer();
4188 }
4189 }
4190
4191 #ifdef ASSERT
4192 bool f = false;
4193 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4194 vmSymbols::void_method_signature());
4195 if (m != NULL && !m->is_empty_method()) {
4196 f = true;
4197 }
4198
4199 // Spec doesn't prevent agent from redefinition of empty finalizer.
4200 // Despite the fact that it's generally bad idea and redefined finalizer
4201 // will not work as expected we shouldn't abort vm in this case
4202 if (!ik->has_redefined_this_or_super()) {
4203 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4204 }
4205 #endif
4206
4207 // Check if this klass supports the java.lang.Cloneable interface
4208 if (SystemDictionary::Cloneable_klass_loaded()) {
4209 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4210 ik->set_is_cloneable();
4211 }
4212 }
4213
4214 // Check if this klass has a vanilla default constructor
4215 if (super == NULL) {
4216 // java.lang.Object has empty default constructor
4217 ik->set_has_vanilla_constructor();
4218 } else {
4219 if (super->has_vanilla_constructor() &&
4220 _has_vanilla_constructor) {
4221 ik->set_has_vanilla_constructor();
4222 }
4223 #ifdef ASSERT
4224 bool v = false;
4225 if (super->has_vanilla_constructor()) {
4226 const Method* const constructor =
4227 ik->find_method(vmSymbols::object_initializer_name(),
4228 vmSymbols::void_method_signature());
4229 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4230 v = true;
4231 }
4232 }
4233 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4234 #endif
4235 }
4236
4237 // If it cannot be fast-path allocated, set a bit in the layout helper.
4238 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4239 assert(ik->size_helper() > 0, "layout_helper is initialized");
4240 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4241 || ik->is_abstract() || ik->is_interface()
4242 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4243 || ik->size_helper() >= FastAllocateSizeLimit) {
4244 // Forbid fast-path allocation.
4245 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4246 ik->set_layout_helper(lh);
4247 }
4248 }
4249
4250 // Attach super classes and interface classes to class loader data
4251 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4252 TRAPS) {
4253 assert(defined_klass != NULL, "invariant");
4254
4255 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4256 if (defining_loader_data->is_the_null_class_loader_data()) {
4257 // Dependencies to null class loader data are implicit.
4258 return;
4259 } else {
4260 // add super class dependency
4261 Klass* const super = defined_klass->super();
4262 if (super != NULL) {
4263 defining_loader_data->record_dependency(super, CHECK);
4264 }
4265
4266 // add super interface dependencies
4267 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4268 if (local_interfaces != NULL) {
4269 const int length = local_interfaces->length();
4270 for (int i = 0; i < length; i++) {
4271 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4272 }
4273 }
4274 }
4275 }
4276
4277 // utility methods for appending an array with check for duplicates
4278
4279 static void append_interfaces(GrowableArray<Klass*>* result,
4280 const Array<Klass*>* const ifs) {
4281 // iterate over new interfaces
4282 for (int i = 0; i < ifs->length(); i++) {
4283 Klass* const e = ifs->at(i);
4284 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4285 // add new interface
4286 result->append_if_missing(e);
4287 }
4288 }
4289
4290 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4291 Array<Klass*>* local_ifs,
4292 ClassLoaderData* loader_data,
4293 TRAPS) {
4294 assert(local_ifs != NULL, "invariant");
4295 assert(loader_data != NULL, "invariant");
4296
4297 // Compute maximum size for transitive interfaces
4298 int max_transitive_size = 0;
4299 int super_size = 0;
4300 // Add superclass transitive interfaces size
4301 if (super != NULL) {
4302 super_size = super->transitive_interfaces()->length();
4303 max_transitive_size += super_size;
4304 }
4305 // Add local interfaces' super interfaces
4306 const int local_size = local_ifs->length();
4307 for (int i = 0; i < local_size; i++) {
4308 Klass* const l = local_ifs->at(i);
4309 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4310 }
4311 // Finally add local interfaces
4312 max_transitive_size += local_size;
4313 // Construct array
4314 if (max_transitive_size == 0) {
4315 // no interfaces, use canonicalized array
4316 return Universe::the_empty_klass_array();
4317 } else if (max_transitive_size == super_size) {
4318 // no new local interfaces added, share superklass' transitive interface array
4319 return super->transitive_interfaces();
4320 } else if (max_transitive_size == local_size) {
4321 // only local interfaces added, share local interface array
4322 return local_ifs;
4323 } else {
4324 ResourceMark rm;
4325 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4326
4327 // Copy down from superclass
4328 if (super != NULL) {
4329 append_interfaces(result, super->transitive_interfaces());
4330 }
4331
4332 // Copy down from local interfaces' superinterfaces
4333 for (int i = 0; i < local_size; i++) {
4334 Klass* const l = local_ifs->at(i);
4335 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4336 }
4337 // Finally add local interfaces
4338 append_interfaces(result, local_ifs);
4339
4340 // length will be less than the max_transitive_size if duplicates were removed
4341 const int length = result->length();
4342 assert(length <= max_transitive_size, "just checking");
4343 Array<Klass*>* const new_result =
4344 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4345 for (int i = 0; i < length; i++) {
4346 Klass* const e = result->at(i);
4347 assert(e != NULL, "just checking");
4348 new_result->at_put(i, e);
4349 }
4350 return new_result;
4351 }
4352 }
4353
4354 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4355 assert(this_klass != NULL, "invariant");
4356 const Klass* const super = this_klass->super();
4357 if (super != NULL) {
4358 Reflection::VerifyClassAccessResults vca_result =
4359 Reflection::verify_class_access(this_klass, super, false);
4360 if (vca_result != Reflection::ACCESS_OK) {
4361 ResourceMark rm(THREAD);
4362 char* msg = Reflection::verify_class_access_msg(this_klass, super, vca_result);
4363 if (msg == NULL) {
4364 ResourceMark rm(THREAD);
4365 Exceptions::fthrow(
4366 THREAD_AND_LOCATION,
4367 vmSymbols::java_lang_IllegalAccessError(),
4368 "class %s cannot access its superclass %s",
4369 this_klass->external_name(),
4370 super->external_name());
4371 } else {
4372 // Add additional message content.
4373 Exceptions::fthrow(
4374 THREAD_AND_LOCATION,
4375 vmSymbols::java_lang_IllegalAccessError(),
4376 "superclass access check failed: %s",
4377 msg);
4378 }
4379 }
4380 }
4381 }
4382
4383
4384 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4385 assert(this_klass != NULL, "invariant");
4386 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4387 const int lng = local_interfaces->length();
4388 for (int i = lng - 1; i >= 0; i--) {
4389 Klass* const k = local_interfaces->at(i);
4390 assert (k != NULL && k->is_interface(), "invalid interface");
4391 Reflection::VerifyClassAccessResults vca_result =
4392 Reflection::verify_class_access(this_klass, k, false);
4393 if (vca_result != Reflection::ACCESS_OK) {
4394 ResourceMark rm(THREAD);
4395 char* msg = Reflection::verify_class_access_msg(this_klass, k, vca_result);
4396 if (msg == NULL) {
4397 Exceptions::fthrow(
4398 THREAD_AND_LOCATION,
4399 vmSymbols::java_lang_IllegalAccessError(),
4400 "class %s cannot access its superinterface %s",
4401 this_klass->external_name(),
4402 k->external_name());
4403 } else {
4404 // Add additional message content.
4405 Exceptions::fthrow(
4406 THREAD_AND_LOCATION,
4407 vmSymbols::java_lang_IllegalAccessError(),
4408 "superinterface check failed: %s",
4409 msg);
4410 }
4411 }
4412 }
4413 }
4414
4415
4416 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4417 assert(this_klass != NULL, "invariant");
4418 const Array<Method*>* const methods = this_klass->methods();
4419 const int num_methods = methods->length();
4420
4421 // go thru each method and check if it overrides a final method
4422 for (int index = 0; index < num_methods; index++) {
4423 const Method* const m = methods->at(index);
4424
4425 // skip private, static, and <init> methods
4426 if ((!m->is_private() && !m->is_static()) &&
4427 (m->name() != vmSymbols::object_initializer_name())) {
4428
4429 const Symbol* const name = m->name();
4430 const Symbol* const signature = m->signature();
4431 const Klass* k = this_klass->super();
4432 const Method* super_m = NULL;
4433 while (k != NULL) {
4434 // skip supers that don't have final methods.
4435 if (k->has_final_method()) {
4436 // lookup a matching method in the super class hierarchy
4437 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4438 if (super_m == NULL) {
4439 break; // didn't find any match; get out
4440 }
4441
4442 if (super_m->is_final() && !super_m->is_static() &&
4443 // matching method in super is final, and not static
4444 (Reflection::verify_field_access(this_klass,
4445 super_m->method_holder(),
4446 super_m->method_holder(),
4447 super_m->access_flags(), false))
4448 // this class can access super final method and therefore override
4449 ) {
4450 ResourceMark rm(THREAD);
4451 Exceptions::fthrow(
4452 THREAD_AND_LOCATION,
4453 vmSymbols::java_lang_VerifyError(),
4454 "class %s overrides final method %s.%s%s",
4455 this_klass->external_name(),
4456 super_m->method_holder()->external_name(),
4457 name->as_C_string(),
4458 signature->as_C_string()
4459 );
4460 return;
4461 }
4462
4463 // continue to look from super_m's holder's super.
4464 k = super_m->method_holder()->super();
4465 continue;
4466 }
4467
4468 k = k->super();
4469 }
4470 }
4471 }
4472 }
4473
4474
4475 // assumes that this_klass is an interface
4476 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4477 assert(this_klass != NULL, "invariant");
4478 assert(this_klass->is_interface(), "not an interface");
4479 const Array<Method*>* methods = this_klass->methods();
4480 const int num_methods = methods->length();
4481
4482 for (int index = 0; index < num_methods; index++) {
4483 const Method* const m = methods->at(index);
4484 // if m is static and not the init method, throw a verify error
4485 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4486 ResourceMark rm(THREAD);
4487 Exceptions::fthrow(
4488 THREAD_AND_LOCATION,
4489 vmSymbols::java_lang_VerifyError(),
4490 "Illegal static method %s in interface %s",
4491 m->name()->as_C_string(),
4492 this_klass->external_name()
4493 );
4494 return;
4495 }
4496 }
4497 }
4498
4499 // utility methods for format checking
4500
4501 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4502 if (!_need_verify) { return; }
4503
4504 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4505 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4506 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4507 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4508 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4509 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4510 const bool is_module_info= (flags & JVM_ACC_MODULE) != 0;
4511 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4512
4513 if ((is_abstract && is_final) ||
4514 (is_interface && !is_abstract) ||
4515 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4516 (!is_interface && major_gte_15 && is_annotation) ||
4517 is_module_info) {
4518 ResourceMark rm(THREAD);
4519 Exceptions::fthrow(
4520 THREAD_AND_LOCATION,
4521 vmSymbols::java_lang_ClassFormatError(),
4522 "Illegal class modifiers in class %s: 0x%X",
4523 _class_name->as_C_string(), flags
4524 );
4525 return;
4526 }
4527 }
4528
4529 static bool has_illegal_visibility(jint flags) {
4530 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4531 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4532 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4533
4534 return ((is_public && is_protected) ||
4535 (is_public && is_private) ||
4536 (is_protected && is_private));
4537 }
4538
4539 static bool is_supported_version(u2 major, u2 minor){
4540 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4541 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4542 (major <= max_version) &&
4543 ((major != max_version) ||
4544 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4545 }
4546
4547 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4548 bool is_interface,
4549 TRAPS) const {
4550 if (!_need_verify) { return; }
4551
4552 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4553 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4554 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4555 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4556 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4557 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4558 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4559 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4560 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4561
4562 bool is_illegal = false;
4563
4564 if (is_interface) {
4565 if (!is_public || !is_static || !is_final || is_private ||
4566 is_protected || is_volatile || is_transient ||
4567 (major_gte_15 && is_enum)) {
4568 is_illegal = true;
4569 }
4570 } else { // not interface
4571 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4572 is_illegal = true;
4573 }
4574 }
4575
4576 if (is_illegal) {
4577 ResourceMark rm(THREAD);
4578 Exceptions::fthrow(
4579 THREAD_AND_LOCATION,
4580 vmSymbols::java_lang_ClassFormatError(),
4581 "Illegal field modifiers in class %s: 0x%X",
4582 _class_name->as_C_string(), flags);
4583 return;
4584 }
4585 }
4586
4587 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4588 bool is_interface,
4589 const Symbol* name,
4590 TRAPS) const {
4591 if (!_need_verify) { return; }
4592
4593 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4594 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4595 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4596 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4597 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4598 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4599 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4600 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4601 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4602 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4603 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4604 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4605 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4606
4607 bool is_illegal = false;
4608
4609 if (is_interface) {
4610 if (major_gte_8) {
4611 // Class file version is JAVA_8_VERSION or later Methods of
4612 // interfaces may set any of the flags except ACC_PROTECTED,
4613 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4614 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4615 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4616 (is_native || is_protected || is_final || is_synchronized) ||
4617 // If a specific method of a class or interface has its
4618 // ACC_ABSTRACT flag set, it must not have any of its
4619 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4620 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4621 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4622 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4623 (is_abstract && (is_private || is_static || is_strict))) {
4624 is_illegal = true;
4625 }
4626 } else if (major_gte_15) {
4627 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4628 if (!is_public || is_private || is_protected || is_static || is_final ||
4629 is_synchronized || is_native || !is_abstract || is_strict) {
4630 is_illegal = true;
4631 }
4632 } else {
4633 // Class file version is pre-JAVA_1_5_VERSION
4634 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4635 is_illegal = true;
4636 }
4637 }
4638 } else { // not interface
4639 if (has_illegal_visibility(flags)) {
4640 is_illegal = true;
4641 } else {
4642 if (is_initializer) {
4643 if (is_static || is_final || is_synchronized || is_native ||
4644 is_abstract || (major_gte_15 && is_bridge)) {
4645 is_illegal = true;
4646 }
4647 } else { // not initializer
4648 if (is_abstract) {
4649 if ((is_final || is_native || is_private || is_static ||
4650 (major_gte_15 && (is_synchronized || is_strict)))) {
4651 is_illegal = true;
4652 }
4653 }
4654 }
4655 }
4656 }
4657
4658 if (is_illegal) {
4659 ResourceMark rm(THREAD);
4660 Exceptions::fthrow(
4661 THREAD_AND_LOCATION,
4662 vmSymbols::java_lang_ClassFormatError(),
4663 "Method %s in class %s has illegal modifiers: 0x%X",
4664 name->as_C_string(), _class_name->as_C_string(), flags);
4665 return;
4666 }
4667 }
4668
4669 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4670 int length,
4671 TRAPS) const {
4672 assert(_need_verify, "only called when _need_verify is true");
4673 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4674 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4675 }
4676 }
4677
4678 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4679 // In class names, '/' separates unqualified names. This is verified in this function also.
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 (ch == '/') {
4706 // check for '//' or leading or trailing '/' which are not legal
4707 // unqualified name must not be empty
4708 if (type == ClassFileParser::LegalClass) {
4709 if (p == name || p+1 >= name+length || *(p+1) == '/') {
4710 return false;
4711 }
4712 } else {
4713 return false; // do not permit '/' unless it's class name
4714 }
4715 }
4716 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
4717 return false; // do not permit '<' or '>' in method names
4718 }
4719 p++;
4720 } else {
4721 char* tmp_p = UTF8::next(p, &ch);
4722 p = tmp_p;
4723 }
4724 }
4725 return true;
4726 }
4727
4728 // Take pointer to a string. Skip over the longest part of the string that could
4729 // be taken as a fieldname. Allow '/' if slash_ok is true.
4730 // Return a pointer to just past the fieldname.
4731 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4732 // being true, we saw consecutive slashes (meaning we were looking for a
4733 // qualified path but found something that was badly-formed).
4734 static const char* skip_over_field_name(const char* name,
4735 bool slash_ok,
4736 unsigned int length) {
4737 const char* p;
4738 jboolean last_is_slash = false;
4739 jboolean not_first_ch = false;
4740
4741 for (p = name; p != name + length; not_first_ch = true) {
4742 const char* old_p = p;
4743 jchar ch = *p;
4744 if (ch < 128) {
4745 p++;
4746 // quick check for ascii
4747 if ((ch >= 'a' && ch <= 'z') ||
4748 (ch >= 'A' && ch <= 'Z') ||
4749 (ch == '_' || ch == '$') ||
4750 (not_first_ch && ch >= '0' && ch <= '9')) {
4751 last_is_slash = false;
4752 continue;
4753 }
4754 if (slash_ok && ch == '/') {
4755 if (last_is_slash) {
4756 return NULL; // Don't permit consecutive slashes
4757 }
4758 last_is_slash = true;
4759 continue;
4760 }
4761 }
4762 else {
4763 jint unicode_ch;
4764 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4765 p = tmp_p;
4766 last_is_slash = false;
4767 // Check if ch is Java identifier start or is Java identifier part
4768 // 4672820: call java.lang.Character methods directly without generating separate tables.
4769 EXCEPTION_MARK;
4770
4771 // return value
4772 JavaValue result(T_BOOLEAN);
4773 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4774 JavaCallArguments args;
4775 args.push_int(unicode_ch);
4776
4777 // public static boolean isJavaIdentifierStart(char ch);
4778 JavaCalls::call_static(&result,
4779 SystemDictionary::Character_klass(),
4780 vmSymbols::isJavaIdentifierStart_name(),
4781 vmSymbols::int_bool_signature(),
4782 &args,
4783 THREAD);
4784
4785 if (HAS_PENDING_EXCEPTION) {
4786 CLEAR_PENDING_EXCEPTION;
4787 return 0;
4788 }
4789 if (result.get_jboolean()) {
4790 continue;
4791 }
4792
4793 if (not_first_ch) {
4794 // public static boolean isJavaIdentifierPart(char ch);
4795 JavaCalls::call_static(&result,
4796 SystemDictionary::Character_klass(),
4797 vmSymbols::isJavaIdentifierPart_name(),
4798 vmSymbols::int_bool_signature(),
4799 &args,
4800 THREAD);
4801
4802 if (HAS_PENDING_EXCEPTION) {
4803 CLEAR_PENDING_EXCEPTION;
4804 return 0;
4805 }
4806
4807 if (result.get_jboolean()) {
4808 continue;
4809 }
4810 }
4811 }
4812 return (not_first_ch) ? old_p : NULL;
4813 }
4814 return (not_first_ch) ? p : NULL;
4815 }
4816
4817 // Take pointer to a string. Skip over the longest part of the string that could
4818 // be taken as a field signature. Allow "void" if void_ok.
4819 // Return a pointer to just past the signature.
4820 // Return NULL if no legal signature is found.
4821 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4822 bool void_ok,
4823 unsigned int length,
4824 TRAPS) const {
4825 unsigned int array_dim = 0;
4826 while (length > 0) {
4827 switch (signature[0]) {
4828 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4829 case JVM_SIGNATURE_BOOLEAN:
4830 case JVM_SIGNATURE_BYTE:
4831 case JVM_SIGNATURE_CHAR:
4832 case JVM_SIGNATURE_SHORT:
4833 case JVM_SIGNATURE_INT:
4834 case JVM_SIGNATURE_FLOAT:
4835 case JVM_SIGNATURE_LONG:
4836 case JVM_SIGNATURE_DOUBLE:
4837 return signature + 1;
4838 case JVM_SIGNATURE_CLASS: {
4839 if (_major_version < JAVA_1_5_VERSION) {
4840 // Skip over the class name if one is there
4841 const char* const p = skip_over_field_name(signature + 1, true, --length);
4842
4843 // The next character better be a semicolon
4844 if (p && (p - signature) > 1 && p[0] == ';') {
4845 return p + 1;
4846 }
4847 }
4848 else {
4849 // 4900761: For class version > 48, any unicode is allowed in class name.
4850 length--;
4851 signature++;
4852 while (length > 0 && signature[0] != ';') {
4853 if (signature[0] == '.') {
4854 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4855 }
4856 length--;
4857 signature++;
4858 }
4859 if (signature[0] == ';') { return signature + 1; }
4860 }
4861
4862 return NULL;
4863 }
4864 case JVM_SIGNATURE_ARRAY:
4865 array_dim++;
4866 if (array_dim > 255) {
4867 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4868 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4869 }
4870 // The rest of what's there better be a legal signature
4871 signature++;
4872 length--;
4873 void_ok = false;
4874 break;
4875
4876 default:
4877 return NULL;
4878 }
4879 }
4880 return NULL;
4881 }
4882
4883 // Checks if name is a legal class name.
4884 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4885 if (!_need_verify || _relax_verify) { return; }
4886
4887 char buf[fixed_buffer_size];
4888 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4889 unsigned int length = name->utf8_length();
4890 bool legal = false;
4891
4892 if (length > 0) {
4893 const char* p;
4894 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4895 p = skip_over_field_signature(bytes, false, length, CHECK);
4896 legal = (p != NULL) && ((p - bytes) == (int)length);
4897 } else if (_major_version < JAVA_1_5_VERSION) {
4898 if (bytes[0] != '<') {
4899 p = skip_over_field_name(bytes, true, length);
4900 legal = (p != NULL) && ((p - bytes) == (int)length);
4901 }
4902 } else {
4903 // 4900761: relax the constraints based on JSR202 spec
4904 // Class names may be drawn from the entire Unicode character set.
4905 // Identifiers between '/' must be unqualified names.
4906 // The utf8 string has been verified when parsing cpool entries.
4907 legal = verify_unqualified_name(bytes, length, LegalClass);
4908 }
4909 }
4910 if (!legal) {
4911 ResourceMark rm(THREAD);
4912 assert(_class_name != NULL, "invariant");
4913 Exceptions::fthrow(
4914 THREAD_AND_LOCATION,
4915 vmSymbols::java_lang_ClassFormatError(),
4916 "Illegal class name \"%s\" in class file %s", bytes,
4917 _class_name->as_C_string()
4918 );
4919 return;
4920 }
4921 }
4922
4923 // Checks if name is a legal field name.
4924 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4925 if (!_need_verify || _relax_verify) { return; }
4926
4927 char buf[fixed_buffer_size];
4928 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4929 unsigned int length = name->utf8_length();
4930 bool legal = false;
4931
4932 if (length > 0) {
4933 if (_major_version < JAVA_1_5_VERSION) {
4934 if (bytes[0] != '<') {
4935 const char* p = skip_over_field_name(bytes, false, length);
4936 legal = (p != NULL) && ((p - bytes) == (int)length);
4937 }
4938 } else {
4939 // 4881221: relax the constraints based on JSR202 spec
4940 legal = verify_unqualified_name(bytes, length, LegalField);
4941 }
4942 }
4943
4944 if (!legal) {
4945 ResourceMark rm(THREAD);
4946 assert(_class_name != NULL, "invariant");
4947 Exceptions::fthrow(
4948 THREAD_AND_LOCATION,
4949 vmSymbols::java_lang_ClassFormatError(),
4950 "Illegal field name \"%s\" in class %s", bytes,
4951 _class_name->as_C_string()
4952 );
4953 return;
4954 }
4955 }
4956
4957 // Checks if name is a legal method name.
4958 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4959 if (!_need_verify || _relax_verify) { return; }
4960
4961 assert(name != NULL, "method name is null");
4962 char buf[fixed_buffer_size];
4963 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4964 unsigned int length = name->utf8_length();
4965 bool legal = false;
4966
4967 if (length > 0) {
4968 if (bytes[0] == '<') {
4969 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4970 legal = true;
4971 }
4972 } else if (_major_version < JAVA_1_5_VERSION) {
4973 const char* p;
4974 p = skip_over_field_name(bytes, false, length);
4975 legal = (p != NULL) && ((p - bytes) == (int)length);
4976 } else {
4977 // 4881221: relax the constraints based on JSR202 spec
4978 legal = verify_unqualified_name(bytes, length, LegalMethod);
4979 }
4980 }
4981
4982 if (!legal) {
4983 ResourceMark rm(THREAD);
4984 assert(_class_name != NULL, "invariant");
4985 Exceptions::fthrow(
4986 THREAD_AND_LOCATION,
4987 vmSymbols::java_lang_ClassFormatError(),
4988 "Illegal method name \"%s\" in class %s", bytes,
4989 _class_name->as_C_string()
4990 );
4991 return;
4992 }
4993 }
4994
4995
4996 // Checks if signature is a legal field signature.
4997 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
4998 const Symbol* signature,
4999 TRAPS) const {
5000 if (!_need_verify) { return; }
5001
5002 char buf[fixed_buffer_size];
5003 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5004 const unsigned int length = signature->utf8_length();
5005 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5006
5007 if (p == NULL || (p - bytes) != (int)length) {
5008 throwIllegalSignature("Field", name, signature, CHECK);
5009 }
5010 }
5011
5012 // Checks if signature is a legal method signature.
5013 // Returns number of parameters
5014 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5015 const Symbol* signature,
5016 TRAPS) const {
5017 if (!_need_verify) {
5018 // make sure caller's args_size will be less than 0 even for non-static
5019 // method so it will be recomputed in compute_size_of_parameters().
5020 return -2;
5021 }
5022
5023 // Class initializers cannot have args for class format version >= 51.
5024 if (name == vmSymbols::class_initializer_name() &&
5025 signature != vmSymbols::void_method_signature() &&
5026 _major_version >= JAVA_7_VERSION) {
5027 throwIllegalSignature("Method", name, signature, CHECK_0);
5028 return 0;
5029 }
5030
5031 unsigned int args_size = 0;
5032 char buf[fixed_buffer_size];
5033 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5034 unsigned int length = signature->utf8_length();
5035 const char* nextp;
5036
5037 // The first character must be a '('
5038 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5039 length--;
5040 // Skip over legal field signatures
5041 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5042 while ((length > 0) && (nextp != NULL)) {
5043 args_size++;
5044 if (p[0] == 'J' || p[0] == 'D') {
5045 args_size++;
5046 }
5047 length -= nextp - p;
5048 p = nextp;
5049 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5050 }
5051 // The first non-signature thing better be a ')'
5052 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5053 length--;
5054 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5055 // All internal methods must return void
5056 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5057 return args_size;
5058 }
5059 } else {
5060 // Now we better just have a return value
5061 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5062 if (nextp && ((int)length == (nextp - p))) {
5063 return args_size;
5064 }
5065 }
5066 }
5067 }
5068 // Report error
5069 throwIllegalSignature("Method", name, signature, CHECK_0);
5070 return 0;
5071 }
5072
5073 int ClassFileParser::static_field_size() const {
5074 assert(_field_info != NULL, "invariant");
5075 return _field_info->static_field_size;
5076 }
5077
5078 int ClassFileParser::total_oop_map_count() const {
5079 assert(_field_info != NULL, "invariant");
5080 return _field_info->total_oop_map_count;
5081 }
5082
5083 jint ClassFileParser::layout_size() const {
5084 assert(_field_info != NULL, "invariant");
5085 return _field_info->instance_size;
5086 }
5087
5088 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5089 const Array<Method*>* methods) {
5090 assert(ik != NULL, "invariant");
5091 assert(methods != NULL, "invariant");
5092
5093 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5094 // (We used to do this lazily, but now we query it in Rewriter,
5095 // which is eagerly done for every method, so we might as well do it now,
5096 // when everything is fresh in memory.)
5097 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5098
5099 if (klass_id != vmSymbols::NO_SID) {
5100 for (int j = 0; j < methods->length(); ++j) {
5101 Method* method = methods->at(j);
5102 method->init_intrinsic_id();
5103
5104 if (CheckIntrinsics) {
5105 // Check if an intrinsic is defined for method 'method',
5106 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5107 if (method->intrinsic_id() != vmIntrinsics::_none &&
5108 !method->intrinsic_candidate()) {
5109 tty->print("Compiler intrinsic is defined for method [%s], "
5110 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5111 method->name_and_sig_as_C_string(),
5112 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5113 );
5114 tty->cr();
5115 DEBUG_ONLY(vm_exit(1));
5116 }
5117 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5118 // but there is no intrinsic available for it.
5119 if (method->intrinsic_candidate() &&
5120 method->intrinsic_id() == vmIntrinsics::_none) {
5121 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5122 "but no compiler intrinsic is defined for the method.%s",
5123 method->name_and_sig_as_C_string(),
5124 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5125 );
5126 tty->cr();
5127 DEBUG_ONLY(vm_exit(1));
5128 }
5129 }
5130 } // end for
5131
5132 #ifdef ASSERT
5133 if (CheckIntrinsics) {
5134 // Check for orphan methods in the current class. A method m
5135 // of a class C is orphan if an intrinsic is defined for method m,
5136 // but class C does not declare m.
5137 // The check is potentially expensive, therefore it is available
5138 // only in debug builds.
5139
5140 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5141 if (vmIntrinsics::_compiledLambdaForm == id) {
5142 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5143 // generated for the JVM from a LambdaForm and therefore no method
5144 // is defined for it.
5145 continue;
5146 }
5147
5148 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5149 // Check if the current class contains a method with the same
5150 // name, flags, signature.
5151 bool match = false;
5152 for (int j = 0; j < methods->length(); ++j) {
5153 const Method* method = methods->at(j);
5154 if (method->intrinsic_id() == id) {
5155 match = true;
5156 break;
5157 }
5158 }
5159
5160 if (!match) {
5161 char buf[1000];
5162 tty->print("Compiler intrinsic is defined for method [%s], "
5163 "but the method is not available in class [%s].%s",
5164 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5165 buf, sizeof(buf)),
5166 ik->name()->as_C_string(),
5167 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5168 );
5169 tty->cr();
5170 DEBUG_ONLY(vm_exit(1));
5171 }
5172 }
5173 } // end for
5174 } // CheckIntrinsics
5175 #endif // ASSERT
5176 }
5177 }
5178
5179 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5180 if (_klass != NULL) {
5181 return _klass;
5182 }
5183
5184 InstanceKlass* const ik =
5185 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5186
5187 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5188
5189 assert(_klass == ik, "invariant");
5190
5191 return ik;
5192 }
5193
5194 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5195 assert(ik != NULL, "invariant");
5196
5197 set_klass_to_deallocate(ik);
5198
5199 assert(_field_info != NULL, "invariant");
5200 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5201 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5202 "sanity");
5203
5204 assert(ik->is_instance_klass(), "sanity");
5205 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5206
5207 // Fill in information already parsed
5208 ik->set_should_verify_class(_need_verify);
5209
5210 // Not yet: supers are done below to support the new subtype-checking fields
5211 ik->set_class_loader_data(_loader_data);
5212 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5213 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5214 assert(_fac != NULL, "invariant");
5215 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5216
5217 // this transfers ownership of a lot of arrays from
5218 // the parser onto the InstanceKlass*
5219 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5220
5221 // note that is not safe to use the fields in the parser from this point on
5222 assert(NULL == _cp, "invariant");
5223 assert(NULL == _fields, "invariant");
5224 assert(NULL == _methods, "invariant");
5225 assert(NULL == _inner_classes, "invariant");
5226 assert(NULL == _local_interfaces, "invariant");
5227 assert(NULL == _transitive_interfaces, "invariant");
5228 assert(NULL == _combined_annotations, "invariant");
5229
5230 if (_has_final_method) {
5231 ik->set_has_final_method();
5232 }
5233
5234 ik->copy_method_ordering(_method_ordering, CHECK);
5235 // The InstanceKlass::_methods_jmethod_ids cache
5236 // is managed on the assumption that the initial cache
5237 // size is equal to the number of methods in the class. If
5238 // that changes, then InstanceKlass::idnum_can_increment()
5239 // has to be changed accordingly.
5240 ik->set_initial_method_idnum(ik->methods()->length());
5241
5242 ik->set_name(_class_name);
5243
5244 if (is_anonymous()) {
5245 // I am well known to myself
5246 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve
5247 }
5248
5249 ik->set_minor_version(_minor_version);
5250 ik->set_major_version(_major_version);
5251 ik->set_has_default_methods(_has_default_methods);
5252 ik->set_declares_default_methods(_declares_default_methods);
5253
5254 if (_host_klass != NULL) {
5255 assert (ik->is_anonymous(), "should be the same");
5256 ik->set_host_klass(_host_klass);
5257 }
5258
5259 // Set PackageEntry for this_klass
5260 oop cl = ik->class_loader();
5261 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5262 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5263 ik->set_package(cld, CHECK);
5264
5265 const Array<Method*>* const methods = ik->methods();
5266 assert(methods != NULL, "invariant");
5267 const int methods_len = methods->length();
5268
5269 check_methods_for_intrinsics(ik, methods);
5270
5271 // Fill in field values obtained by parse_classfile_attributes
5272 if (_parsed_annotations->has_any_annotations()) {
5273 _parsed_annotations->apply_to(ik);
5274 }
5275
5276 apply_parsed_class_attributes(ik);
5277
5278 // Miranda methods
5279 if ((_num_miranda_methods > 0) ||
5280 // if this class introduced new miranda methods or
5281 (_super_klass != NULL && _super_klass->has_miranda_methods())
5282 // super class exists and this class inherited miranda methods
5283 ) {
5284 ik->set_has_miranda_methods(); // then set a flag
5285 }
5286
5287 // Fill in information needed to compute superclasses.
5288 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5289
5290 // Initialize itable offset tables
5291 klassItable::setup_itable_offset_table(ik);
5292
5293 // Compute transitive closure of interfaces this class implements
5294 // Do final class setup
5295 fill_oop_maps(ik,
5296 _field_info->nonstatic_oop_map_count,
5297 _field_info->nonstatic_oop_offsets,
5298 _field_info->nonstatic_oop_counts);
5299
5300 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5301 set_precomputed_flags(ik);
5302
5303 // check if this class can access its super class
5304 check_super_class_access(ik, CHECK);
5305
5306 // check if this class can access its superinterfaces
5307 check_super_interface_access(ik, CHECK);
5308
5309 // check if this class overrides any final method
5310 check_final_method_override(ik, CHECK);
5311
5312 // check that if this class is an interface then it doesn't have static methods
5313 if (ik->is_interface()) {
5314 /* An interface in a JAVA 8 classfile can be static */
5315 if (_major_version < JAVA_8_VERSION) {
5316 check_illegal_static_method(ik, CHECK);
5317 }
5318 }
5319
5320 // Obtain this_klass' module entry
5321 ModuleEntry* module_entry = ik->module();
5322 assert(module_entry != NULL, "module_entry should always be set");
5323
5324 // Obtain java.lang.reflect.Module
5325 Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module()));
5326
5327 // Allocate mirror and initialize static fields
5328 // The create_mirror() call will also call compute_modifiers()
5329 java_lang_Class::create_mirror(ik,
5330 _loader_data->class_loader(),
5331 module_handle,
5332 _protection_domain,
5333 CHECK);
5334
5335 assert(_all_mirandas != NULL, "invariant");
5336
5337 // Generate any default methods - default methods are interface methods
5338 // that have a default implementation. This is new with Lambda project.
5339 if (_has_default_methods ) {
5340 DefaultMethods::generate_default_methods(ik,
5341 _all_mirandas,
5342 CHECK);
5343 }
5344
5345 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5346 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5347 !module_entry->has_default_read_edges()) {
5348 if (!module_entry->set_has_default_read_edges()) {
5349 // We won a potential race
5350 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5351 }
5352 }
5353
5354 // Update the loader_data graph.
5355 record_defined_class_dependencies(ik, CHECK);
5356
5357 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5358
5359 if (!is_internal()) {
5360 if (log_is_enabled(Info, class, load)) {
5361 ResourceMark rm;
5362 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
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 // Anonymous classes such as generated LambdaForm classes are also not included.
5713 if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
5714 _host_klass == NULL) {
5715 ResourceMark rm(THREAD);
5716 classlist_file->print_cr("%s", _class_name->as_C_string());
5717 classlist_file->flush();
5718 }
5719 }
5720 #endif
5721 }
5722
5723 // SUPERKLASS
5724 _super_class_index = stream->get_u2_fast();
5725 _super_klass = parse_super_class(cp,
5726 _super_class_index,
5727 _need_verify,
5728 CHECK);
5729
5730 // Interfaces
5731 _itfs_len = stream->get_u2_fast();
5732 parse_interfaces(stream,
5733 _itfs_len,
5734 cp,
5735 &_has_default_methods,
5736 CHECK);
5737
5738 assert(_local_interfaces != NULL, "invariant");
5739
5740 // Fields (offsets are filled in later)
5741 _fac = new FieldAllocationCount();
5742 parse_fields(stream,
5743 _access_flags.is_interface(),
5744 _fac,
5745 cp,
5746 cp_size,
5747 &_java_fields_count,
5748 CHECK);
5749
5750 assert(_fields != NULL, "invariant");
5751
5752 // Methods
5753 AccessFlags promoted_flags;
5754 parse_methods(stream,
5755 _access_flags.is_interface(),
5756 &promoted_flags,
5757 &_has_final_method,
5758 &_declares_default_methods,
5759 CHECK);
5760
5761 assert(_methods != NULL, "invariant");
5762
5763 // promote flags from parse_methods() to the klass' flags
5764 _access_flags.add_promoted_flags(promoted_flags.as_int());
5765
5766 if (_declares_default_methods) {
5767 _has_default_methods = true;
5768 }
5769
5770 // Additional attributes/annotations
5771 _parsed_annotations = new ClassAnnotationCollector();
5772 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5773
5774 assert(_inner_classes != NULL, "invariant");
5775
5776 // Finalize the Annotations metadata object,
5777 // now that all annotation arrays have been created.
5778 create_combined_annotations(CHECK);
5779
5780 // Make sure this is the end of class file stream
5781 guarantee_property(stream->at_eos(),
5782 "Extra bytes at the end of class file %s",
5783 CHECK);
5784
5785 // all bytes in stream read and parsed
5786 }
5787
5788 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5789 ConstantPool* cp,
5790 TRAPS) {
5791 assert(stream != NULL, "invariant");
5792 assert(stream->at_eos(), "invariant");
5793 assert(cp != NULL, "invariant");
5794 assert(_loader_data != NULL, "invariant");
5795
5796 // We check super class after class file is parsed and format is checked
5797 if (_super_class_index > 0 && NULL ==_super_klass) {
5798 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5799 if (_access_flags.is_interface()) {
5800 // Before attempting to resolve the superclass, check for class format
5801 // errors not checked yet.
5802 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5803 "Interfaces must have java.lang.Object as superclass in class file %s",
5804 CHECK);
5805 }
5806 _super_klass = (const InstanceKlass*)
5807 SystemDictionary::resolve_super_or_fail(_class_name,
5808 super_class_name,
5809 _loader_data->class_loader(),
5810 _protection_domain,
5811 true,
5812 CHECK);
5813 }
5814
5815 if (_super_klass != NULL) {
5816 if (_super_klass->has_default_methods()) {
5817 _has_default_methods = true;
5818 }
5819
5820 if (_super_klass->is_interface()) {
5821 ResourceMark rm(THREAD);
5822 Exceptions::fthrow(
5823 THREAD_AND_LOCATION,
5824 vmSymbols::java_lang_IncompatibleClassChangeError(),
5825 "class %s has interface %s as super class",
5826 _class_name->as_klass_external_name(),
5827 _super_klass->external_name()
5828 );
5829 return;
5830 }
5831 // Make sure super class is not final
5832 if (_super_klass->is_final()) {
5833 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
5834 }
5835 }
5836
5837 // Compute the transitive list of all unique interfaces implemented by this class
5838 _transitive_interfaces =
5839 compute_transitive_interfaces(_super_klass,
5840 _local_interfaces,
5841 _loader_data,
5842 CHECK);
5843
5844 assert(_transitive_interfaces != NULL, "invariant");
5845
5846 // sort methods
5847 _method_ordering = sort_methods(_methods);
5848
5849 _all_mirandas = new GrowableArray<Method*>(20);
5850
5851 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5852 &_num_miranda_methods,
5853 _all_mirandas,
5854 _super_klass,
5855 _methods,
5856 _access_flags,
5857 _loader_data->class_loader(),
5858 _class_name,
5859 _local_interfaces,
5860 CHECK);
5861
5862 // Size of Java itable (in words)
5863 _itable_size = _access_flags.is_interface() ? 0 :
5864 klassItable::compute_itable_size(_transitive_interfaces);
5865
5866 assert(_fac != NULL, "invariant");
5867 assert(_parsed_annotations != NULL, "invariant");
5868
5869 _field_info = new FieldLayoutInfo();
5870 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
5871
5872 // Compute reference typ
5873 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
5874
5875 }
5876
5877 void ClassFileParser::set_klass(InstanceKlass* klass) {
5878
5879 #ifdef ASSERT
5880 if (klass != NULL) {
5881 assert(NULL == _klass, "leaking?");
5882 }
5883 #endif
5884
5885 _klass = klass;
5886 }
5887
5888 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
5889
5890 #ifdef ASSERT
5891 if (klass != NULL) {
5892 assert(NULL == _klass_to_deallocate, "leaking?");
5893 }
5894 #endif
5895
5896 _klass_to_deallocate = klass;
5897 }
5898
5899 // Caller responsible for ResourceMark
5900 // clone stream with rewound position
5901 const ClassFileStream* ClassFileParser::clone_stream() const {
5902 assert(_stream != NULL, "invariant");
5903
5904 return _stream->clone();
5905 }