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 if (has_annotation(_method_ForceInline))
2050 m->set_force_inline(true);
2051 if (has_annotation(_method_DontInline))
2052 m->set_dont_inline(true);
2053 if (has_annotation(_method_InjectedProfile))
2054 m->set_has_injected_profile(true);
2055 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2056 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2057 if (has_annotation(_method_LambdaForm_Hidden))
2058 m->set_hidden(true);
2059 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2060 m->set_intrinsic_candidate(true);
2061 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2062 m->set_has_reserved_stack_access(true);
2063 }
2064
2065 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2066 assert(ik != NULL, "invariant");
2067 ik->set_is_contended(is_contended());
2068 }
2069
2070 #define MAX_ARGS_SIZE 255
2071 #define MAX_CODE_SIZE 65535
2072 #define INITIAL_MAX_LVT_NUMBER 256
2073
2074 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2075 *
2076 * Rules for LVT's and LVTT's are:
2077 * - There can be any number of LVT's and LVTT's.
2078 * - If there are n LVT's, it is the same as if there was just
2079 * one LVT containing all the entries from the n LVT's.
2080 * - There may be no more than one LVT entry per local variable.
2081 * Two LVT entries are 'equal' if these fields are the same:
2082 * start_pc, length, name, slot
2083 * - There may be no more than one LVTT entry per each LVT entry.
2084 * Each LVTT entry has to match some LVT entry.
2085 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2086 */
2087 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2088 int lvt_cnt,
2089 u2* const localvariable_table_length,
2090 const u2**const localvariable_table_start,
2091 int lvtt_cnt,
2092 u2* const localvariable_type_table_length,
2093 const u2**const localvariable_type_table_start,
2094 TRAPS) {
2095
2096 ResourceMark rm(THREAD);
2097
2098 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2099 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2100
2101 LVT_HashTable* const table = new LVT_HashTable();
2102
2103 // To fill LocalVariableTable in
2104 const Classfile_LVT_Element* cf_lvt;
2105 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2106
2107 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2108 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2109 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2110 copy_lvt_element(&cf_lvt[idx], lvt);
2111 // If no duplicates, add LVT elem in hashtable.
2112 if (table->put(*lvt, lvt) == false
2113 && _need_verify
2114 && _major_version >= JAVA_1_5_VERSION) {
2115 classfile_parse_error("Duplicated LocalVariableTable attribute "
2116 "entry for '%s' in class file %s",
2117 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2118 CHECK);
2119 }
2120 }
2121 }
2122
2123 // To merge LocalVariableTable and LocalVariableTypeTable
2124 const Classfile_LVT_Element* cf_lvtt;
2125 LocalVariableTableElement lvtt_elem;
2126
2127 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2128 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2129 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2130 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2131 LocalVariableTableElement** entry = table->get(lvtt_elem);
2132 if (entry == NULL) {
2133 if (_need_verify) {
2134 classfile_parse_error("LVTT entry for '%s' in class file %s "
2135 "does not match any LVT entry",
2136 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2137 CHECK);
2138 }
2139 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2140 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2141 "entry for '%s' in class file %s",
2142 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2143 CHECK);
2144 } else {
2145 // to add generic signatures into LocalVariableTable
2146 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2147 }
2148 }
2149 }
2150 }
2151
2152
2153 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2154 const u1* runtime_visible_annotations,
2155 int runtime_visible_annotations_length,
2156 const u1* runtime_invisible_annotations,
2157 int runtime_invisible_annotations_length,
2158 const u1* runtime_visible_parameter_annotations,
2159 int runtime_visible_parameter_annotations_length,
2160 const u1* runtime_invisible_parameter_annotations,
2161 int runtime_invisible_parameter_annotations_length,
2162 const u1* runtime_visible_type_annotations,
2163 int runtime_visible_type_annotations_length,
2164 const u1* runtime_invisible_type_annotations,
2165 int runtime_invisible_type_annotations_length,
2166 const u1* annotation_default,
2167 int annotation_default_length,
2168 TRAPS) {
2169
2170 AnnotationArray* a;
2171
2172 if (runtime_visible_annotations_length +
2173 runtime_invisible_annotations_length > 0) {
2174 a = assemble_annotations(runtime_visible_annotations,
2175 runtime_visible_annotations_length,
2176 runtime_invisible_annotations,
2177 runtime_invisible_annotations_length,
2178 CHECK);
2179 cm->set_method_annotations(a);
2180 }
2181
2182 if (runtime_visible_parameter_annotations_length +
2183 runtime_invisible_parameter_annotations_length > 0) {
2184 a = assemble_annotations(runtime_visible_parameter_annotations,
2185 runtime_visible_parameter_annotations_length,
2186 runtime_invisible_parameter_annotations,
2187 runtime_invisible_parameter_annotations_length,
2188 CHECK);
2189 cm->set_parameter_annotations(a);
2190 }
2191
2192 if (annotation_default_length > 0) {
2193 a = assemble_annotations(annotation_default,
2194 annotation_default_length,
2195 NULL,
2196 0,
2197 CHECK);
2198 cm->set_default_annotations(a);
2199 }
2200
2201 if (runtime_visible_type_annotations_length +
2202 runtime_invisible_type_annotations_length > 0) {
2203 a = assemble_annotations(runtime_visible_type_annotations,
2204 runtime_visible_type_annotations_length,
2205 runtime_invisible_type_annotations,
2206 runtime_invisible_type_annotations_length,
2207 CHECK);
2208 cm->set_type_annotations(a);
2209 }
2210 }
2211
2212
2213 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2214 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2215 // Method* to save footprint, so we only know the size of the resulting Method* when the
2216 // entire method attribute is parsed.
2217 //
2218 // The promoted_flags parameter is used to pass relevant access_flags
2219 // from the method back up to the containing klass. These flag values
2220 // are added to klass's access_flags.
2221
2222 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2223 bool is_interface,
2224 const ConstantPool* cp,
2225 AccessFlags* const promoted_flags,
2226 TRAPS) {
2227 assert(cfs != NULL, "invariant");
2228 assert(cp != NULL, "invariant");
2229 assert(promoted_flags != NULL, "invariant");
2230
2231 ResourceMark rm(THREAD);
2232 // Parse fixed parts:
2233 // access_flags, name_index, descriptor_index, attributes_count
2234 cfs->guarantee_more(8, CHECK_NULL);
2235
2236 int flags = cfs->get_u2_fast();
2237 const u2 name_index = cfs->get_u2_fast();
2238 const int cp_size = cp->length();
2239 check_property(
2240 valid_symbol_at(name_index),
2241 "Illegal constant pool index %u for method name in class file %s",
2242 name_index, CHECK_NULL);
2243 const Symbol* const name = cp->symbol_at(name_index);
2244 verify_legal_method_name(name, CHECK_NULL);
2245
2246 const u2 signature_index = cfs->get_u2_fast();
2247 guarantee_property(
2248 valid_symbol_at(signature_index),
2249 "Illegal constant pool index %u for method signature in class file %s",
2250 signature_index, CHECK_NULL);
2251 const Symbol* const signature = cp->symbol_at(signature_index);
2252
2253 if (name == vmSymbols::class_initializer_name()) {
2254 // We ignore the other access flags for a valid class initializer.
2255 // (JVM Spec 2nd ed., chapter 4.6)
2256 if (_major_version < 51) { // backward compatibility
2257 flags = JVM_ACC_STATIC;
2258 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2259 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2260 } else {
2261 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2262 }
2263 } else {
2264 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2265 }
2266
2267 if (name == vmSymbols::object_initializer_name() && is_interface) {
2268 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2269 }
2270
2271 int args_size = -1; // only used when _need_verify is true
2272 if (_need_verify) {
2273 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2274 verify_legal_method_signature(name, signature, CHECK_NULL);
2275 if (args_size > MAX_ARGS_SIZE) {
2276 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2277 }
2278 }
2279
2280 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2281
2282 // Default values for code and exceptions attribute elements
2283 u2 max_stack = 0;
2284 u2 max_locals = 0;
2285 u4 code_length = 0;
2286 const u1* code_start = 0;
2287 u2 exception_table_length = 0;
2288 const u2* exception_table_start = NULL;
2289 Array<int>* exception_handlers = Universe::the_empty_int_array();
2290 u2 checked_exceptions_length = 0;
2291 const u2* checked_exceptions_start = NULL;
2292 CompressedLineNumberWriteStream* linenumber_table = NULL;
2293 int linenumber_table_length = 0;
2294 int total_lvt_length = 0;
2295 u2 lvt_cnt = 0;
2296 u2 lvtt_cnt = 0;
2297 bool lvt_allocated = false;
2298 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2299 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2300 u2* localvariable_table_length = NULL;
2301 const u2** localvariable_table_start = NULL;
2302 u2* localvariable_type_table_length = NULL;
2303 const u2** localvariable_type_table_start = NULL;
2304 int method_parameters_length = -1;
2305 const u1* method_parameters_data = NULL;
2306 bool method_parameters_seen = false;
2307 bool parsed_code_attribute = false;
2308 bool parsed_checked_exceptions_attribute = false;
2309 bool parsed_stackmap_attribute = false;
2310 // stackmap attribute - JDK1.5
2311 const u1* stackmap_data = NULL;
2312 int stackmap_data_length = 0;
2313 u2 generic_signature_index = 0;
2314 MethodAnnotationCollector parsed_annotations;
2315 const u1* runtime_visible_annotations = NULL;
2316 int runtime_visible_annotations_length = 0;
2317 const u1* runtime_invisible_annotations = NULL;
2318 int runtime_invisible_annotations_length = 0;
2319 const u1* runtime_visible_parameter_annotations = NULL;
2320 int runtime_visible_parameter_annotations_length = 0;
2321 const u1* runtime_invisible_parameter_annotations = NULL;
2322 int runtime_invisible_parameter_annotations_length = 0;
2323 const u1* runtime_visible_type_annotations = NULL;
2324 int runtime_visible_type_annotations_length = 0;
2325 const u1* runtime_invisible_type_annotations = NULL;
2326 int runtime_invisible_type_annotations_length = 0;
2327 bool runtime_invisible_annotations_exists = false;
2328 bool runtime_invisible_type_annotations_exists = false;
2329 bool runtime_invisible_parameter_annotations_exists = false;
2330 const u1* annotation_default = NULL;
2331 int annotation_default_length = 0;
2332
2333 // Parse code and exceptions attribute
2334 u2 method_attributes_count = cfs->get_u2_fast();
2335 while (method_attributes_count--) {
2336 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2337 const u2 method_attribute_name_index = cfs->get_u2_fast();
2338 const u4 method_attribute_length = cfs->get_u4_fast();
2339 check_property(
2340 valid_symbol_at(method_attribute_name_index),
2341 "Invalid method attribute name index %u in class file %s",
2342 method_attribute_name_index, CHECK_NULL);
2343
2344 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2345 if (method_attribute_name == vmSymbols::tag_code()) {
2346 // Parse Code attribute
2347 if (_need_verify) {
2348 guarantee_property(
2349 !access_flags.is_native() && !access_flags.is_abstract(),
2350 "Code attribute in native or abstract methods in class file %s",
2351 CHECK_NULL);
2352 }
2353 if (parsed_code_attribute) {
2354 classfile_parse_error("Multiple Code attributes in class file %s",
2355 CHECK_NULL);
2356 }
2357 parsed_code_attribute = true;
2358
2359 // Stack size, locals size, and code size
2360 if (_major_version == 45 && _minor_version <= 2) {
2361 cfs->guarantee_more(4, CHECK_NULL);
2362 max_stack = cfs->get_u1_fast();
2363 max_locals = cfs->get_u1_fast();
2364 code_length = cfs->get_u2_fast();
2365 } else {
2366 cfs->guarantee_more(8, CHECK_NULL);
2367 max_stack = cfs->get_u2_fast();
2368 max_locals = cfs->get_u2_fast();
2369 code_length = cfs->get_u4_fast();
2370 }
2371 if (_need_verify) {
2372 guarantee_property(args_size <= max_locals,
2373 "Arguments can't fit into locals in class file %s",
2374 CHECK_NULL);
2375 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2376 "Invalid method Code length %u in class file %s",
2377 code_length, CHECK_NULL);
2378 }
2379 // Code pointer
2380 code_start = cfs->get_u1_buffer();
2381 assert(code_start != NULL, "null code start");
2382 cfs->guarantee_more(code_length, CHECK_NULL);
2383 cfs->skip_u1_fast(code_length);
2384
2385 // Exception handler table
2386 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2387 exception_table_length = cfs->get_u2_fast();
2388 if (exception_table_length > 0) {
2389 exception_table_start = parse_exception_table(cfs,
2390 code_length,
2391 exception_table_length,
2392 CHECK_NULL);
2393 }
2394
2395 // Parse additional attributes in code attribute
2396 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2397 u2 code_attributes_count = cfs->get_u2_fast();
2398
2399 unsigned int calculated_attribute_length = 0;
2400
2401 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2402 calculated_attribute_length =
2403 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2404 } else {
2405 // max_stack, locals and length are smaller in pre-version 45.2 classes
2406 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2407 }
2408 calculated_attribute_length +=
2409 code_length +
2410 sizeof(exception_table_length) +
2411 sizeof(code_attributes_count) +
2412 exception_table_length *
2413 ( sizeof(u2) + // start_pc
2414 sizeof(u2) + // end_pc
2415 sizeof(u2) + // handler_pc
2416 sizeof(u2) ); // catch_type_index
2417
2418 while (code_attributes_count--) {
2419 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2420 const u2 code_attribute_name_index = cfs->get_u2_fast();
2421 const u4 code_attribute_length = cfs->get_u4_fast();
2422 calculated_attribute_length += code_attribute_length +
2423 sizeof(code_attribute_name_index) +
2424 sizeof(code_attribute_length);
2425 check_property(valid_symbol_at(code_attribute_name_index),
2426 "Invalid code attribute name index %u in class file %s",
2427 code_attribute_name_index,
2428 CHECK_NULL);
2429 if (LoadLineNumberTables &&
2430 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2431 // Parse and compress line number table
2432 parse_linenumber_table(code_attribute_length,
2433 code_length,
2434 &linenumber_table,
2435 CHECK_NULL);
2436
2437 } else if (LoadLocalVariableTables &&
2438 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2439 // Parse local variable table
2440 if (!lvt_allocated) {
2441 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2442 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2443 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2444 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2445 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2446 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2447 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2448 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2449 lvt_allocated = true;
2450 }
2451 if (lvt_cnt == max_lvt_cnt) {
2452 max_lvt_cnt <<= 1;
2453 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2454 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2455 }
2456 localvariable_table_start[lvt_cnt] =
2457 parse_localvariable_table(cfs,
2458 code_length,
2459 max_locals,
2460 code_attribute_length,
2461 &localvariable_table_length[lvt_cnt],
2462 false, // is not LVTT
2463 CHECK_NULL);
2464 total_lvt_length += localvariable_table_length[lvt_cnt];
2465 lvt_cnt++;
2466 } else if (LoadLocalVariableTypeTables &&
2467 _major_version >= JAVA_1_5_VERSION &&
2468 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2469 if (!lvt_allocated) {
2470 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2471 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2472 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2473 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2474 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2475 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2476 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2477 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2478 lvt_allocated = true;
2479 }
2480 // Parse local variable type table
2481 if (lvtt_cnt == max_lvtt_cnt) {
2482 max_lvtt_cnt <<= 1;
2483 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2484 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2485 }
2486 localvariable_type_table_start[lvtt_cnt] =
2487 parse_localvariable_table(cfs,
2488 code_length,
2489 max_locals,
2490 code_attribute_length,
2491 &localvariable_type_table_length[lvtt_cnt],
2492 true, // is LVTT
2493 CHECK_NULL);
2494 lvtt_cnt++;
2495 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2496 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2497 // Stack map is only needed by the new verifier in JDK1.5.
2498 if (parsed_stackmap_attribute) {
2499 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2500 }
2501 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2502 stackmap_data_length = code_attribute_length;
2503 parsed_stackmap_attribute = true;
2504 } else {
2505 // Skip unknown attributes
2506 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2507 }
2508 }
2509 // check method attribute length
2510 if (_need_verify) {
2511 guarantee_property(method_attribute_length == calculated_attribute_length,
2512 "Code segment has wrong length in class file %s",
2513 CHECK_NULL);
2514 }
2515 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2516 // Parse Exceptions attribute
2517 if (parsed_checked_exceptions_attribute) {
2518 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2519 CHECK_NULL);
2520 }
2521 parsed_checked_exceptions_attribute = true;
2522 checked_exceptions_start =
2523 parse_checked_exceptions(cfs,
2524 &checked_exceptions_length,
2525 method_attribute_length,
2526 CHECK_NULL);
2527 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2528 // reject multiple method parameters
2529 if (method_parameters_seen) {
2530 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2531 CHECK_NULL);
2532 }
2533 method_parameters_seen = true;
2534 method_parameters_length = cfs->get_u1_fast();
2535 const u2 real_length = (method_parameters_length * 4u) + 1u;
2536 if (method_attribute_length != real_length) {
2537 classfile_parse_error(
2538 "Invalid MethodParameters method attribute length %u in class file",
2539 method_attribute_length, CHECK_NULL);
2540 }
2541 method_parameters_data = cfs->get_u1_buffer();
2542 cfs->skip_u2_fast(method_parameters_length);
2543 cfs->skip_u2_fast(method_parameters_length);
2544 // ignore this attribute if it cannot be reflected
2545 if (!SystemDictionary::Parameter_klass_loaded())
2546 method_parameters_length = -1;
2547 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2548 if (method_attribute_length != 0) {
2549 classfile_parse_error(
2550 "Invalid Synthetic method attribute length %u in class file %s",
2551 method_attribute_length, CHECK_NULL);
2552 }
2553 // Should we check that there hasn't already been a synthetic attribute?
2554 access_flags.set_is_synthetic();
2555 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2556 if (method_attribute_length != 0) {
2557 classfile_parse_error(
2558 "Invalid Deprecated method attribute length %u in class file %s",
2559 method_attribute_length, CHECK_NULL);
2560 }
2561 } else if (_major_version >= JAVA_1_5_VERSION) {
2562 if (method_attribute_name == vmSymbols::tag_signature()) {
2563 if (method_attribute_length != 2) {
2564 classfile_parse_error(
2565 "Invalid Signature attribute length %u in class file %s",
2566 method_attribute_length, CHECK_NULL);
2567 }
2568 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2569 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2570 if (runtime_visible_annotations != NULL) {
2571 classfile_parse_error(
2572 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2573 CHECK_NULL);
2574 }
2575 runtime_visible_annotations_length = method_attribute_length;
2576 runtime_visible_annotations = cfs->get_u1_buffer();
2577 assert(runtime_visible_annotations != NULL, "null visible annotations");
2578 parse_annotations(cp,
2579 runtime_visible_annotations,
2580 runtime_visible_annotations_length,
2581 &parsed_annotations,
2582 _loader_data,
2583 CHECK_NULL);
2584 cfs->skip_u1(runtime_visible_annotations_length, CHECK_NULL);
2585 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2586 if (runtime_invisible_annotations_exists) {
2587 classfile_parse_error(
2588 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2589 CHECK_NULL);
2590 }
2591 runtime_invisible_annotations_exists = true;
2592 if (PreserveAllAnnotations) {
2593 runtime_invisible_annotations_length = method_attribute_length;
2594 runtime_invisible_annotations = cfs->get_u1_buffer();
2595 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2596 }
2597 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2598 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2599 if (runtime_visible_parameter_annotations != NULL) {
2600 classfile_parse_error(
2601 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2602 CHECK_NULL);
2603 }
2604 runtime_visible_parameter_annotations_length = method_attribute_length;
2605 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2606 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2607 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2608 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2609 if (runtime_invisible_parameter_annotations_exists) {
2610 classfile_parse_error(
2611 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2612 CHECK_NULL);
2613 }
2614 runtime_invisible_parameter_annotations_exists = true;
2615 if (PreserveAllAnnotations) {
2616 runtime_invisible_parameter_annotations_length = method_attribute_length;
2617 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2618 assert(runtime_invisible_parameter_annotations != NULL,
2619 "null invisible parameter annotations");
2620 }
2621 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2622 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2623 if (annotation_default != NULL) {
2624 classfile_parse_error(
2625 "Multiple AnnotationDefault attributes for method in class file %s",
2626 CHECK_NULL);
2627 }
2628 annotation_default_length = method_attribute_length;
2629 annotation_default = cfs->get_u1_buffer();
2630 assert(annotation_default != NULL, "null annotation default");
2631 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2632 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2633 if (runtime_visible_type_annotations != NULL) {
2634 classfile_parse_error(
2635 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2636 CHECK_NULL);
2637 }
2638 runtime_visible_type_annotations_length = method_attribute_length;
2639 runtime_visible_type_annotations = cfs->get_u1_buffer();
2640 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2641 // No need for the VM to parse Type annotations
2642 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2643 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2644 if (runtime_invisible_type_annotations_exists) {
2645 classfile_parse_error(
2646 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2647 CHECK_NULL);
2648 } else {
2649 runtime_invisible_type_annotations_exists = true;
2650 }
2651 if (PreserveAllAnnotations) {
2652 runtime_invisible_type_annotations_length = method_attribute_length;
2653 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2654 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2655 }
2656 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2657 } else {
2658 // Skip unknown attributes
2659 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2660 }
2661 } else {
2662 // Skip unknown attributes
2663 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2664 }
2665 }
2666
2667 if (linenumber_table != NULL) {
2668 linenumber_table->write_terminator();
2669 linenumber_table_length = linenumber_table->position();
2670 }
2671
2672 // Make sure there's at least one Code attribute in non-native/non-abstract method
2673 if (_need_verify) {
2674 guarantee_property(access_flags.is_native() ||
2675 access_flags.is_abstract() ||
2676 parsed_code_attribute,
2677 "Absent Code attribute in method that is not native or abstract in class file %s",
2678 CHECK_NULL);
2679 }
2680
2681 // All sizing information for a Method* is finally available, now create it
2682 InlineTableSizes sizes(
2683 total_lvt_length,
2684 linenumber_table_length,
2685 exception_table_length,
2686 checked_exceptions_length,
2687 method_parameters_length,
2688 generic_signature_index,
2689 runtime_visible_annotations_length +
2690 runtime_invisible_annotations_length,
2691 runtime_visible_parameter_annotations_length +
2692 runtime_invisible_parameter_annotations_length,
2693 runtime_visible_type_annotations_length +
2694 runtime_invisible_type_annotations_length,
2695 annotation_default_length,
2696 0);
2697
2698 Method* const m = Method::allocate(_loader_data,
2699 code_length,
2700 access_flags,
2701 &sizes,
2702 ConstMethod::NORMAL,
2703 CHECK_NULL);
2704
2705 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2706
2707 // Fill in information from fixed part (access_flags already set)
2708 m->set_constants(_cp);
2709 m->set_name_index(name_index);
2710 m->set_signature_index(signature_index);
2711
2712 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2713 m->constMethod()->set_result_type(rtf.type());
2714
2715 if (args_size >= 0) {
2716 m->set_size_of_parameters(args_size);
2717 } else {
2718 m->compute_size_of_parameters(THREAD);
2719 }
2720 #ifdef ASSERT
2721 if (args_size >= 0) {
2722 m->compute_size_of_parameters(THREAD);
2723 assert(args_size == m->size_of_parameters(), "");
2724 }
2725 #endif
2726
2727 // Fill in code attribute information
2728 m->set_max_stack(max_stack);
2729 m->set_max_locals(max_locals);
2730 if (stackmap_data != NULL) {
2731 m->constMethod()->copy_stackmap_data(_loader_data,
2732 (u1*)stackmap_data,
2733 stackmap_data_length,
2734 CHECK_NULL);
2735 }
2736
2737 // Copy byte codes
2738 m->set_code((u1*)code_start);
2739
2740 // Copy line number table
2741 if (linenumber_table != NULL) {
2742 memcpy(m->compressed_linenumber_table(),
2743 linenumber_table->buffer(),
2744 linenumber_table_length);
2745 }
2746
2747 // Copy exception table
2748 if (exception_table_length > 0) {
2749 int size =
2750 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2751 copy_u2_with_conversion((u2*) m->exception_table_start(),
2752 exception_table_start, size);
2753 }
2754
2755 // Copy method parameters
2756 if (method_parameters_length > 0) {
2757 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2758 for (int i = 0; i < method_parameters_length; i++) {
2759 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2760 method_parameters_data += 2;
2761 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2762 method_parameters_data += 2;
2763 }
2764 }
2765
2766 // Copy checked exceptions
2767 if (checked_exceptions_length > 0) {
2768 const int size =
2769 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2770 copy_u2_with_conversion((u2*) m->checked_exceptions_start(),
2771 checked_exceptions_start,
2772 size);
2773 }
2774
2775 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2776 if (total_lvt_length > 0) {
2777 promoted_flags->set_has_localvariable_table();
2778 copy_localvariable_table(m->constMethod(),
2779 lvt_cnt,
2780 localvariable_table_length,
2781 localvariable_table_start,
2782 lvtt_cnt,
2783 localvariable_type_table_length,
2784 localvariable_type_table_start,
2785 CHECK_NULL);
2786 }
2787
2788 if (parsed_annotations.has_any_annotations())
2789 parsed_annotations.apply_to(m);
2790
2791 // Copy annotations
2792 copy_method_annotations(m->constMethod(),
2793 runtime_visible_annotations,
2794 runtime_visible_annotations_length,
2795 runtime_invisible_annotations,
2796 runtime_invisible_annotations_length,
2797 runtime_visible_parameter_annotations,
2798 runtime_visible_parameter_annotations_length,
2799 runtime_invisible_parameter_annotations,
2800 runtime_invisible_parameter_annotations_length,
2801 runtime_visible_type_annotations,
2802 runtime_visible_type_annotations_length,
2803 runtime_invisible_type_annotations,
2804 runtime_invisible_type_annotations_length,
2805 annotation_default,
2806 annotation_default_length,
2807 CHECK_NULL);
2808
2809 if (name == vmSymbols::finalize_method_name() &&
2810 signature == vmSymbols::void_method_signature()) {
2811 if (m->is_empty_method()) {
2812 _has_empty_finalizer = true;
2813 } else {
2814 _has_finalizer = true;
2815 }
2816 }
2817 if (name == vmSymbols::object_initializer_name() &&
2818 signature == vmSymbols::void_method_signature() &&
2819 m->is_vanilla_constructor()) {
2820 _has_vanilla_constructor = true;
2821 }
2822
2823 NOT_PRODUCT(m->verify());
2824 return m;
2825 }
2826
2827
2828 // The promoted_flags parameter is used to pass relevant access_flags
2829 // from the methods back up to the containing klass. These flag values
2830 // are added to klass's access_flags.
2831 // Side-effects: populates the _methods field in the parser
2832 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2833 bool is_interface,
2834 AccessFlags* promoted_flags,
2835 bool* has_final_method,
2836 bool* declares_default_methods,
2837 TRAPS) {
2838 assert(cfs != NULL, "invariant");
2839 assert(promoted_flags != NULL, "invariant");
2840 assert(has_final_method != NULL, "invariant");
2841 assert(declares_default_methods != NULL, "invariant");
2842
2843 assert(NULL == _methods, "invariant");
2844
2845 cfs->guarantee_more(2, CHECK); // length
2846 const u2 length = cfs->get_u2_fast();
2847 if (length == 0) {
2848 _methods = Universe::the_empty_method_array();
2849 } else {
2850 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2851 length,
2852 NULL,
2853 CHECK);
2854
2855 HandleMark hm(THREAD);
2856 for (int index = 0; index < length; index++) {
2857 Method* method = parse_method(cfs,
2858 is_interface,
2859 _cp,
2860 promoted_flags,
2861 CHECK);
2862
2863 if (method->is_final()) {
2864 *has_final_method = true;
2865 }
2866 // declares_default_methods: declares concrete instance methods, any access flags
2867 // used for interface initialization, and default method inheritance analysis
2868 if (is_interface && !(*declares_default_methods)
2869 && !method->is_abstract() && !method->is_static()) {
2870 *declares_default_methods = true;
2871 }
2872 _methods->at_put(index, method);
2873 }
2874
2875 if (_need_verify && length > 1) {
2876 // Check duplicated methods
2877 ResourceMark rm(THREAD);
2878 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2879 THREAD, NameSigHash*, HASH_ROW_SIZE);
2880 initialize_hashtable(names_and_sigs);
2881 bool dup = false;
2882 {
2883 debug_only(NoSafepointVerifier nsv;)
2884 for (int i = 0; i < length; i++) {
2885 const Method* const m = _methods->at(i);
2886 // If no duplicates, add name/signature in hashtable names_and_sigs.
2887 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2888 dup = true;
2889 break;
2890 }
2891 }
2892 }
2893 if (dup) {
2894 classfile_parse_error("Duplicate method name&signature in class file %s",
2895 CHECK);
2896 }
2897 }
2898 }
2899 }
2900
2901 static const intArray* sort_methods(Array<Method*>* methods) {
2902 const int length = methods->length();
2903 // If JVMTI original method ordering or sharing is enabled we have to
2904 // remember the original class file ordering.
2905 // We temporarily use the vtable_index field in the Method* to store the
2906 // class file index, so we can read in after calling qsort.
2907 // Put the method ordering in the shared archive.
2908 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2909 for (int index = 0; index < length; index++) {
2910 Method* const m = methods->at(index);
2911 assert(!m->valid_vtable_index(), "vtable index should not be set");
2912 m->set_vtable_index(index);
2913 }
2914 }
2915 // Sort method array by ascending method name (for faster lookups & vtable construction)
2916 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2917 Method::sort_methods(methods);
2918
2919 intArray* method_ordering = NULL;
2920 // If JVMTI original method ordering or sharing is enabled construct int
2921 // array remembering the original ordering
2922 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2923 method_ordering = new intArray(length, length, -1);
2924 for (int index = 0; index < length; index++) {
2925 Method* const m = methods->at(index);
2926 const int old_index = m->vtable_index();
2927 assert(old_index >= 0 && old_index < length, "invalid method index");
2928 method_ordering->at_put(index, old_index);
2929 m->set_vtable_index(Method::invalid_vtable_index);
2930 }
2931 }
2932 return method_ordering;
2933 }
2934
2935 // Parse generic_signature attribute for methods and fields
2936 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2937 TRAPS) {
2938 assert(cfs != NULL, "invariant");
2939
2940 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2941 const u2 generic_signature_index = cfs->get_u2_fast();
2942 check_property(
2943 valid_symbol_at(generic_signature_index),
2944 "Invalid Signature attribute at constant pool index %u in class file %s",
2945 generic_signature_index, CHECK_0);
2946 return generic_signature_index;
2947 }
2948
2949 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2950 TRAPS) {
2951
2952 assert(cfs != NULL, "invariant");
2953
2954 cfs->guarantee_more(2, CHECK); // sourcefile_index
2955 const u2 sourcefile_index = cfs->get_u2_fast();
2956 check_property(
2957 valid_symbol_at(sourcefile_index),
2958 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2959 sourcefile_index, CHECK);
2960 set_class_sourcefile_index(sourcefile_index);
2961 }
2962
2963 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2964 int length,
2965 TRAPS) {
2966 assert(cfs != NULL, "invariant");
2967
2968 const u1* const sde_buffer = cfs->get_u1_buffer();
2969 assert(sde_buffer != NULL, "null sde buffer");
2970
2971 // Don't bother storing it if there is no way to retrieve it
2972 if (JvmtiExport::can_get_source_debug_extension()) {
2973 assert((length+1) > length, "Overflow checking");
2974 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2975 for (int i = 0; i < length; i++) {
2976 sde[i] = sde_buffer[i];
2977 }
2978 sde[length] = '\0';
2979 set_class_sde_buffer((const char*)sde, length);
2980 }
2981 // Got utf8 string, set stream position forward
2982 cfs->skip_u1(length, CHECK);
2983 }
2984
2985
2986 // Inner classes can be static, private or protected (classic VM does this)
2987 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
2988 JVM_ACC_PRIVATE | \
2989 JVM_ACC_PROTECTED | \
2990 JVM_ACC_STATIC \
2991 )
2992
2993 // Return number of classes in the inner classes attribute table
2994 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
2995 const u1* const inner_classes_attribute_start,
2996 bool parsed_enclosingmethod_attribute,
2997 u2 enclosing_method_class_index,
2998 u2 enclosing_method_method_index,
2999 TRAPS) {
3000 const u1* const current_mark = cfs->current();
3001 u2 length = 0;
3002 if (inner_classes_attribute_start != NULL) {
3003 cfs->set_current(inner_classes_attribute_start);
3004 cfs->guarantee_more(2, CHECK_0); // length
3005 length = cfs->get_u2_fast();
3006 }
3007
3008 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3009 // method data:
3010 // [inner_class_info_index,
3011 // outer_class_info_index,
3012 // inner_name_index,
3013 // inner_class_access_flags,
3014 // ...
3015 // enclosing_method_class_index,
3016 // enclosing_method_method_index]
3017 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3018 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3019 _inner_classes = inner_classes;
3020
3021 int index = 0;
3022 const int cp_size = _cp->length();
3023 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3024 for (int n = 0; n < length; n++) {
3025 // Inner class index
3026 const u2 inner_class_info_index = cfs->get_u2_fast();
3027 check_property(
3028 valid_klass_reference_at(inner_class_info_index),
3029 "inner_class_info_index %u has bad constant type in class file %s",
3030 inner_class_info_index, CHECK_0);
3031 // Outer class index
3032 const u2 outer_class_info_index = cfs->get_u2_fast();
3033 check_property(
3034 outer_class_info_index == 0 ||
3035 valid_klass_reference_at(outer_class_info_index),
3036 "outer_class_info_index %u has bad constant type in class file %s",
3037 outer_class_info_index, CHECK_0);
3038 // Inner class name
3039 const u2 inner_name_index = cfs->get_u2_fast();
3040 check_property(
3041 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3042 "inner_name_index %u has bad constant type in class file %s",
3043 inner_name_index, CHECK_0);
3044 if (_need_verify) {
3045 guarantee_property(inner_class_info_index != outer_class_info_index,
3046 "Class is both outer and inner class in class file %s", CHECK_0);
3047 }
3048 // Access flags
3049 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3050 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3051 // Set abstract bit for old class files for backward compatibility
3052 flags |= JVM_ACC_ABSTRACT;
3053 }
3054 verify_legal_class_modifiers(flags, CHECK_0);
3055 AccessFlags inner_access_flags(flags);
3056
3057 inner_classes->at_put(index++, inner_class_info_index);
3058 inner_classes->at_put(index++, outer_class_info_index);
3059 inner_classes->at_put(index++, inner_name_index);
3060 inner_classes->at_put(index++, inner_access_flags.as_short());
3061 }
3062
3063 // 4347400: make sure there's no duplicate entry in the classes array
3064 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3065 for(int i = 0; i < length * 4; i += 4) {
3066 for(int j = i + 4; j < length * 4; j += 4) {
3067 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3068 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3069 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3070 inner_classes->at(i+3) != inner_classes->at(j+3)),
3071 "Duplicate entry in InnerClasses in class file %s",
3072 CHECK_0);
3073 }
3074 }
3075 }
3076
3077 // Set EnclosingMethod class and method indexes.
3078 if (parsed_enclosingmethod_attribute) {
3079 inner_classes->at_put(index++, enclosing_method_class_index);
3080 inner_classes->at_put(index++, enclosing_method_method_index);
3081 }
3082 assert(index == size, "wrong size");
3083
3084 // Restore buffer's current position.
3085 cfs->set_current(current_mark);
3086
3087 return length;
3088 }
3089
3090 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3091 set_class_synthetic_flag(true);
3092 }
3093
3094 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3095 assert(cfs != NULL, "invariant");
3096
3097 const u2 signature_index = cfs->get_u2(CHECK);
3098 check_property(
3099 valid_symbol_at(signature_index),
3100 "Invalid constant pool index %u in Signature attribute in class file %s",
3101 signature_index, CHECK);
3102 set_class_generic_signature_index(signature_index);
3103 }
3104
3105 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3106 ConstantPool* cp,
3107 u4 attribute_byte_length,
3108 TRAPS) {
3109 assert(cfs != NULL, "invariant");
3110 assert(cp != NULL, "invariant");
3111
3112 const u1* const current_start = cfs->current();
3113
3114 guarantee_property(attribute_byte_length >= sizeof(u2),
3115 "Invalid BootstrapMethods attribute length %u in class file %s",
3116 attribute_byte_length,
3117 CHECK);
3118
3119 cfs->guarantee_more(attribute_byte_length, CHECK);
3120
3121 const int attribute_array_length = cfs->get_u2_fast();
3122
3123 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3124 "Short length on BootstrapMethods in class file %s",
3125 CHECK);
3126
3127
3128 // The attribute contains a counted array of counted tuples of shorts,
3129 // represending bootstrap specifiers:
3130 // length*{bootstrap_method_index, argument_count*{argument_index}}
3131 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3132 // operand_count = number of shorts in attr, except for leading length
3133
3134 // The attribute is copied into a short[] array.
3135 // The array begins with a series of short[2] pairs, one for each tuple.
3136 const int index_size = (attribute_array_length * 2);
3137
3138 Array<u2>* const operands =
3139 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3140
3141 // Eagerly assign operands so they will be deallocated with the constant
3142 // pool if there is an error.
3143 cp->set_operands(operands);
3144
3145 int operand_fill_index = index_size;
3146 const int cp_size = cp->length();
3147
3148 for (int n = 0; n < attribute_array_length; n++) {
3149 // Store a 32-bit offset into the header of the operand array.
3150 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3151
3152 // Read a bootstrap specifier.
3153 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3154 const u2 bootstrap_method_index = cfs->get_u2_fast();
3155 const u2 argument_count = cfs->get_u2_fast();
3156 check_property(
3157 valid_cp_range(bootstrap_method_index, cp_size) &&
3158 cp->tag_at(bootstrap_method_index).is_method_handle(),
3159 "bootstrap_method_index %u has bad constant type in class file %s",
3160 bootstrap_method_index,
3161 CHECK);
3162
3163 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3164 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3165 CHECK);
3166
3167 operands->at_put(operand_fill_index++, bootstrap_method_index);
3168 operands->at_put(operand_fill_index++, argument_count);
3169
3170 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3171 for (int j = 0; j < argument_count; j++) {
3172 const u2 argument_index = cfs->get_u2_fast();
3173 check_property(
3174 valid_cp_range(argument_index, cp_size) &&
3175 cp->tag_at(argument_index).is_loadable_constant(),
3176 "argument_index %u has bad constant type in class file %s",
3177 argument_index,
3178 CHECK);
3179 operands->at_put(operand_fill_index++, argument_index);
3180 }
3181 }
3182 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3183 "Bad length on BootstrapMethods in class file %s",
3184 CHECK);
3185 }
3186
3187 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3188 ConstantPool* cp,
3189 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3190 TRAPS) {
3191 assert(cfs != NULL, "invariant");
3192 assert(cp != NULL, "invariant");
3193 assert(parsed_annotations != NULL, "invariant");
3194
3195 // Set inner classes attribute to default sentinel
3196 _inner_classes = Universe::the_empty_short_array();
3197 cfs->guarantee_more(2, CHECK); // attributes_count
3198 u2 attributes_count = cfs->get_u2_fast();
3199 bool parsed_sourcefile_attribute = false;
3200 bool parsed_innerclasses_attribute = false;
3201 bool parsed_enclosingmethod_attribute = false;
3202 bool parsed_bootstrap_methods_attribute = false;
3203 const u1* runtime_visible_annotations = NULL;
3204 int runtime_visible_annotations_length = 0;
3205 const u1* runtime_invisible_annotations = NULL;
3206 int runtime_invisible_annotations_length = 0;
3207 const u1* runtime_visible_type_annotations = NULL;
3208 int runtime_visible_type_annotations_length = 0;
3209 const u1* runtime_invisible_type_annotations = NULL;
3210 int runtime_invisible_type_annotations_length = 0;
3211 bool runtime_invisible_type_annotations_exists = false;
3212 bool runtime_invisible_annotations_exists = false;
3213 bool parsed_source_debug_ext_annotations_exist = false;
3214 const u1* inner_classes_attribute_start = NULL;
3215 u4 inner_classes_attribute_length = 0;
3216 u2 enclosing_method_class_index = 0;
3217 u2 enclosing_method_method_index = 0;
3218 // Iterate over attributes
3219 while (attributes_count--) {
3220 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3221 const u2 attribute_name_index = cfs->get_u2_fast();
3222 const u4 attribute_length = cfs->get_u4_fast();
3223 check_property(
3224 valid_symbol_at(attribute_name_index),
3225 "Attribute name has bad constant pool index %u in class file %s",
3226 attribute_name_index, CHECK);
3227 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3228 if (tag == vmSymbols::tag_source_file()) {
3229 // Check for SourceFile tag
3230 if (_need_verify) {
3231 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3232 }
3233 if (parsed_sourcefile_attribute) {
3234 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3235 } else {
3236 parsed_sourcefile_attribute = true;
3237 }
3238 parse_classfile_sourcefile_attribute(cfs, CHECK);
3239 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3240 // Check for SourceDebugExtension tag
3241 if (parsed_source_debug_ext_annotations_exist) {
3242 classfile_parse_error(
3243 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3244 }
3245 parsed_source_debug_ext_annotations_exist = true;
3246 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3247 } else if (tag == vmSymbols::tag_inner_classes()) {
3248 // Check for InnerClasses tag
3249 if (parsed_innerclasses_attribute) {
3250 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3251 } else {
3252 parsed_innerclasses_attribute = true;
3253 }
3254 inner_classes_attribute_start = cfs->get_u1_buffer();
3255 inner_classes_attribute_length = attribute_length;
3256 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3257 } else if (tag == vmSymbols::tag_synthetic()) {
3258 // Check for Synthetic tag
3259 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3260 if (attribute_length != 0) {
3261 classfile_parse_error(
3262 "Invalid Synthetic classfile attribute length %u in class file %s",
3263 attribute_length, CHECK);
3264 }
3265 parse_classfile_synthetic_attribute(CHECK);
3266 } else if (tag == vmSymbols::tag_deprecated()) {
3267 // Check for Deprecatd tag - 4276120
3268 if (attribute_length != 0) {
3269 classfile_parse_error(
3270 "Invalid Deprecated classfile attribute length %u in class file %s",
3271 attribute_length, CHECK);
3272 }
3273 } else if (_major_version >= JAVA_1_5_VERSION) {
3274 if (tag == vmSymbols::tag_signature()) {
3275 if (attribute_length != 2) {
3276 classfile_parse_error(
3277 "Wrong Signature attribute length %u in class file %s",
3278 attribute_length, CHECK);
3279 }
3280 parse_classfile_signature_attribute(cfs, CHECK);
3281 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3282 if (runtime_visible_annotations != NULL) {
3283 classfile_parse_error(
3284 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3285 }
3286 runtime_visible_annotations_length = attribute_length;
3287 runtime_visible_annotations = cfs->get_u1_buffer();
3288 assert(runtime_visible_annotations != NULL, "null visible annotations");
3289 parse_annotations(cp,
3290 runtime_visible_annotations,
3291 runtime_visible_annotations_length,
3292 parsed_annotations,
3293 _loader_data,
3294 CHECK);
3295 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
3296 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3297 if (runtime_invisible_annotations_exists) {
3298 classfile_parse_error(
3299 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3300 }
3301 runtime_invisible_annotations_exists = true;
3302 if (PreserveAllAnnotations) {
3303 runtime_invisible_annotations_length = attribute_length;
3304 runtime_invisible_annotations = cfs->get_u1_buffer();
3305 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3306 }
3307 cfs->skip_u1(attribute_length, CHECK);
3308 } else if (tag == vmSymbols::tag_enclosing_method()) {
3309 if (parsed_enclosingmethod_attribute) {
3310 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3311 } else {
3312 parsed_enclosingmethod_attribute = true;
3313 }
3314 guarantee_property(attribute_length == 4,
3315 "Wrong EnclosingMethod attribute length %u in class file %s",
3316 attribute_length, CHECK);
3317 cfs->guarantee_more(4, CHECK); // class_index, method_index
3318 enclosing_method_class_index = cfs->get_u2_fast();
3319 enclosing_method_method_index = cfs->get_u2_fast();
3320 if (enclosing_method_class_index == 0) {
3321 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3322 }
3323 // Validate the constant pool indices and types
3324 check_property(valid_klass_reference_at(enclosing_method_class_index),
3325 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3326 if (enclosing_method_method_index != 0 &&
3327 (!cp->is_within_bounds(enclosing_method_method_index) ||
3328 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3329 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3330 }
3331 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3332 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3333 if (parsed_bootstrap_methods_attribute) {
3334 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3335 }
3336 parsed_bootstrap_methods_attribute = true;
3337 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3338 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3339 if (runtime_visible_type_annotations != NULL) {
3340 classfile_parse_error(
3341 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3342 }
3343 runtime_visible_type_annotations_length = attribute_length;
3344 runtime_visible_type_annotations = cfs->get_u1_buffer();
3345 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3346 // No need for the VM to parse Type annotations
3347 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3348 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3349 if (runtime_invisible_type_annotations_exists) {
3350 classfile_parse_error(
3351 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3352 } else {
3353 runtime_invisible_type_annotations_exists = true;
3354 }
3355 if (PreserveAllAnnotations) {
3356 runtime_invisible_type_annotations_length = attribute_length;
3357 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3358 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3359 }
3360 cfs->skip_u1(attribute_length, CHECK);
3361 } else {
3362 // Unknown attribute
3363 cfs->skip_u1(attribute_length, CHECK);
3364 }
3365 } else {
3366 // Unknown attribute
3367 cfs->skip_u1(attribute_length, CHECK);
3368 }
3369 }
3370 _annotations = assemble_annotations(runtime_visible_annotations,
3371 runtime_visible_annotations_length,
3372 runtime_invisible_annotations,
3373 runtime_invisible_annotations_length,
3374 CHECK);
3375 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3376 runtime_visible_type_annotations_length,
3377 runtime_invisible_type_annotations,
3378 runtime_invisible_type_annotations_length,
3379 CHECK);
3380
3381 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3382 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3383 cfs,
3384 inner_classes_attribute_start,
3385 parsed_innerclasses_attribute,
3386 enclosing_method_class_index,
3387 enclosing_method_method_index,
3388 CHECK);
3389 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3390 guarantee_property(
3391 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3392 "Wrong InnerClasses attribute length in class file %s", CHECK);
3393 }
3394 }
3395
3396 if (_max_bootstrap_specifier_index >= 0) {
3397 guarantee_property(parsed_bootstrap_methods_attribute,
3398 "Missing BootstrapMethods attribute in class file %s", CHECK);
3399 }
3400 }
3401
3402 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3403 assert(k != NULL, "invariant");
3404
3405 if (_synthetic_flag)
3406 k->set_is_synthetic();
3407 if (_sourcefile_index != 0) {
3408 k->set_source_file_name_index(_sourcefile_index);
3409 }
3410 if (_generic_signature_index != 0) {
3411 k->set_generic_signature_index(_generic_signature_index);
3412 }
3413 if (_sde_buffer != NULL) {
3414 k->set_source_debug_extension(_sde_buffer, _sde_length);
3415 }
3416 }
3417
3418 // Create the Annotations object that will
3419 // hold the annotations array for the Klass.
3420 void ClassFileParser::create_combined_annotations(TRAPS) {
3421 if (_annotations == NULL &&
3422 _type_annotations == NULL &&
3423 _fields_annotations == NULL &&
3424 _fields_type_annotations == NULL) {
3425 // Don't create the Annotations object unnecessarily.
3426 return;
3427 }
3428
3429 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3430 annotations->set_class_annotations(_annotations);
3431 annotations->set_class_type_annotations(_type_annotations);
3432 annotations->set_fields_annotations(_fields_annotations);
3433 annotations->set_fields_type_annotations(_fields_type_annotations);
3434
3435 // This is the Annotations object that will be
3436 // assigned to InstanceKlass being constructed.
3437 _combined_annotations = annotations;
3438
3439 // The annotations arrays below has been transfered the
3440 // _combined_annotations so these fields can now be cleared.
3441 _annotations = NULL;
3442 _type_annotations = NULL;
3443 _fields_annotations = NULL;
3444 _fields_type_annotations = NULL;
3445 }
3446
3447 // Transfer ownership of metadata allocated to the InstanceKlass.
3448 void ClassFileParser::apply_parsed_class_metadata(
3449 InstanceKlass* this_klass,
3450 int java_fields_count, TRAPS) {
3451 assert(this_klass != NULL, "invariant");
3452
3453 _cp->set_pool_holder(this_klass);
3454 this_klass->set_constants(_cp);
3455 this_klass->set_fields(_fields, java_fields_count);
3456 this_klass->set_methods(_methods);
3457 this_klass->set_inner_classes(_inner_classes);
3458 this_klass->set_local_interfaces(_local_interfaces);
3459 this_klass->set_transitive_interfaces(_transitive_interfaces);
3460 this_klass->set_annotations(_combined_annotations);
3461
3462 // Clear out these fields so they don't get deallocated by the destructor
3463 clear_class_metadata();
3464 }
3465
3466 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3467 int runtime_visible_annotations_length,
3468 const u1* const runtime_invisible_annotations,
3469 int runtime_invisible_annotations_length,
3470 TRAPS) {
3471 AnnotationArray* annotations = NULL;
3472 if (runtime_visible_annotations != NULL ||
3473 runtime_invisible_annotations != NULL) {
3474 annotations = MetadataFactory::new_array<u1>(_loader_data,
3475 runtime_visible_annotations_length +
3476 runtime_invisible_annotations_length,
3477 CHECK_(annotations));
3478 if (runtime_visible_annotations != NULL) {
3479 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3480 annotations->at_put(i, runtime_visible_annotations[i]);
3481 }
3482 }
3483 if (runtime_invisible_annotations != NULL) {
3484 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3485 int append = runtime_visible_annotations_length+i;
3486 annotations->at_put(append, runtime_invisible_annotations[i]);
3487 }
3488 }
3489 }
3490 return annotations;
3491 }
3492
3493 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3494 const int super_class_index,
3495 const bool need_verify,
3496 TRAPS) {
3497 assert(cp != NULL, "invariant");
3498 const InstanceKlass* super_klass = NULL;
3499
3500 if (super_class_index == 0) {
3501 check_property(_class_name == vmSymbols::java_lang_Object(),
3502 "Invalid superclass index %u in class file %s",
3503 super_class_index,
3504 CHECK_NULL);
3505 } else {
3506 check_property(valid_klass_reference_at(super_class_index),
3507 "Invalid superclass index %u in class file %s",
3508 super_class_index,
3509 CHECK_NULL);
3510 // The class name should be legal because it is checked when parsing constant pool.
3511 // However, make sure it is not an array type.
3512 bool is_array = false;
3513 if (cp->tag_at(super_class_index).is_klass()) {
3514 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3515 if (need_verify)
3516 is_array = super_klass->is_array_klass();
3517 } else if (need_verify) {
3518 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3519 }
3520 if (need_verify) {
3521 guarantee_property(!is_array,
3522 "Bad superclass name in class file %s", CHECK_NULL);
3523 }
3524 }
3525 return super_klass;
3526 }
3527
3528 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3529 unsigned int nonstatic_oop_map_count,
3530 int first_nonstatic_oop_offset) {
3531
3532 unsigned int map_count =
3533 NULL == super ? 0 : super->nonstatic_oop_map_count();
3534 if (nonstatic_oop_map_count > 0) {
3535 // We have oops to add to map
3536 if (map_count == 0) {
3537 map_count = nonstatic_oop_map_count;
3538 }
3539 else {
3540 // Check whether we should add a new map block or whether the last one can
3541 // be extended
3542 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3543 const OopMapBlock* const last_map = first_map + map_count - 1;
3544
3545 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3546 if (next_offset == first_nonstatic_oop_offset) {
3547 // There is no gap bettwen superklass's last oop field and first
3548 // local oop field, merge maps.
3549 nonstatic_oop_map_count -= 1;
3550 }
3551 else {
3552 // Superklass didn't end with a oop field, add extra maps
3553 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3554 }
3555 map_count += nonstatic_oop_map_count;
3556 }
3557 }
3558 return map_count;
3559 }
3560
3561 #ifndef PRODUCT
3562 static void print_field_layout(const Symbol* name,
3563 Array<u2>* fields,
3564 constantPoolHandle cp,
3565 int instance_size,
3566 int instance_fields_start,
3567 int instance_fields_end,
3568 int static_fields_end) {
3569
3570 assert(name != NULL, "invariant");
3571
3572 tty->print("%s: field layout\n", name->as_klass_external_name());
3573 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3574 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3575 if (!fs.access_flags().is_static()) {
3576 tty->print(" @%3d \"%s\" %s\n",
3577 fs.offset(),
3578 fs.name()->as_klass_external_name(),
3579 fs.signature()->as_klass_external_name());
3580 }
3581 }
3582 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3583 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3584 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3585 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3586 if (fs.access_flags().is_static()) {
3587 tty->print(" @%3d \"%s\" %s\n",
3588 fs.offset(),
3589 fs.name()->as_klass_external_name(),
3590 fs.signature()->as_klass_external_name());
3591 }
3592 }
3593 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3594 tty->print("\n");
3595 }
3596 #endif
3597
3598 // Values needed for oopmap and InstanceKlass creation
3599 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3600 public:
3601 int* nonstatic_oop_offsets;
3602 unsigned int* nonstatic_oop_counts;
3603 unsigned int nonstatic_oop_map_count;
3604 unsigned int total_oop_map_count;
3605 int instance_size;
3606 int nonstatic_field_size;
3607 int static_field_size;
3608 bool has_nonstatic_fields;
3609 };
3610
3611 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3612 void ClassFileParser::layout_fields(ConstantPool* cp,
3613 const FieldAllocationCount* fac,
3614 const ClassAnnotationCollector* parsed_annotations,
3615 FieldLayoutInfo* info,
3616 TRAPS) {
3617
3618 assert(cp != NULL, "invariant");
3619
3620 // Field size and offset computation
3621 int nonstatic_field_size = _super_klass == NULL ? 0 :
3622 _super_klass->nonstatic_field_size();
3623
3624 // Count the contended fields by type.
3625 //
3626 // We ignore static fields, because @Contended is not supported for them.
3627 // The layout code below will also ignore the static fields.
3628 int nonstatic_contended_count = 0;
3629 FieldAllocationCount fac_contended;
3630 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3631 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3632 if (fs.is_contended()) {
3633 fac_contended.count[atype]++;
3634 if (!fs.access_flags().is_static()) {
3635 nonstatic_contended_count++;
3636 }
3637 }
3638 }
3639
3640
3641 // Calculate the starting byte offsets
3642 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3643 int next_static_double_offset = next_static_oop_offset +
3644 ((fac->count[STATIC_OOP]) * heapOopSize);
3645 if ( fac->count[STATIC_DOUBLE] &&
3646 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3647 Universe::field_type_should_be_aligned(T_LONG)) ) {
3648 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3649 }
3650
3651 int next_static_word_offset = next_static_double_offset +
3652 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3653 int next_static_short_offset = next_static_word_offset +
3654 ((fac->count[STATIC_WORD]) * BytesPerInt);
3655 int next_static_byte_offset = next_static_short_offset +
3656 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3657
3658 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3659 nonstatic_field_size * heapOopSize;
3660
3661 int next_nonstatic_field_offset = nonstatic_fields_start;
3662
3663 const bool is_contended_class = parsed_annotations->is_contended();
3664
3665 // Class is contended, pad before all the fields
3666 if (is_contended_class) {
3667 next_nonstatic_field_offset += ContendedPaddingWidth;
3668 }
3669
3670 // Compute the non-contended fields count.
3671 // The packing code below relies on these counts to determine if some field
3672 // can be squeezed into the alignment gap. Contended fields are obviously
3673 // exempt from that.
3674 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3675 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3676 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3677 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3678 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3679
3680 // Total non-static fields count, including every contended field
3681 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3682 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3683 fac->count[NONSTATIC_OOP];
3684
3685 const bool super_has_nonstatic_fields =
3686 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3687 const bool has_nonstatic_fields =
3688 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3689
3690
3691 // Prepare list of oops for oop map generation.
3692 //
3693 // "offset" and "count" lists are describing the set of contiguous oop
3694 // regions. offset[i] is the start of the i-th region, which then has
3695 // count[i] oops following. Before we know how many regions are required,
3696 // we pessimistically allocate the maps to fit all the oops into the
3697 // distinct regions.
3698 //
3699 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3700 // to figure out if we still need to do this.
3701 unsigned int nonstatic_oop_map_count = 0;
3702 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3703
3704 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3705 THREAD, int, max_nonstatic_oop_maps);
3706 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3707 THREAD, unsigned int, max_nonstatic_oop_maps);
3708
3709 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3710
3711 bool compact_fields = CompactFields;
3712 int allocation_style = FieldsAllocationStyle;
3713 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3714 assert(false, "0 <= FieldsAllocationStyle <= 2");
3715 allocation_style = 1; // Optimistic
3716 }
3717
3718 // The next classes have predefined hard-coded fields offsets
3719 // (see in JavaClasses::compute_hard_coded_offsets()).
3720 // Use default fields allocation order for them.
3721 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3722 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3723 _class_name == vmSymbols::java_lang_Class() ||
3724 _class_name == vmSymbols::java_lang_ClassLoader() ||
3725 _class_name == vmSymbols::java_lang_ref_Reference() ||
3726 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3727 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3728 _class_name == vmSymbols::java_lang_String() ||
3729 _class_name == vmSymbols::java_lang_Throwable() ||
3730 _class_name == vmSymbols::java_lang_Boolean() ||
3731 _class_name == vmSymbols::java_lang_Character() ||
3732 _class_name == vmSymbols::java_lang_Float() ||
3733 _class_name == vmSymbols::java_lang_Double() ||
3734 _class_name == vmSymbols::java_lang_Byte() ||
3735 _class_name == vmSymbols::java_lang_Short() ||
3736 _class_name == vmSymbols::java_lang_Integer() ||
3737 _class_name == vmSymbols::java_lang_Long())) {
3738 allocation_style = 0; // Allocate oops first
3739 compact_fields = false; // Don't compact fields
3740 }
3741
3742 int next_nonstatic_oop_offset = 0;
3743 int next_nonstatic_double_offset = 0;
3744
3745 // Rearrange fields for a given allocation style
3746 if( allocation_style == 0 ) {
3747 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3748 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3749 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3750 (nonstatic_oop_count * heapOopSize);
3751 } else if( allocation_style == 1 ) {
3752 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3753 next_nonstatic_double_offset = next_nonstatic_field_offset;
3754 } else if( allocation_style == 2 ) {
3755 // Fields allocation: oops fields in super and sub classes are together.
3756 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3757 _super_klass->nonstatic_oop_map_size() > 0 ) {
3758 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3759 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3760 const OopMapBlock* const last_map = first_map + map_count - 1;
3761 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3762 if (next_offset == next_nonstatic_field_offset) {
3763 allocation_style = 0; // allocate oops first
3764 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3765 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3766 (nonstatic_oop_count * heapOopSize);
3767 }
3768 }
3769 if( allocation_style == 2 ) {
3770 allocation_style = 1; // allocate oops last
3771 next_nonstatic_double_offset = next_nonstatic_field_offset;
3772 }
3773 } else {
3774 ShouldNotReachHere();
3775 }
3776
3777 int nonstatic_oop_space_count = 0;
3778 int nonstatic_word_space_count = 0;
3779 int nonstatic_short_space_count = 0;
3780 int nonstatic_byte_space_count = 0;
3781 int nonstatic_oop_space_offset = 0;
3782 int nonstatic_word_space_offset = 0;
3783 int nonstatic_short_space_offset = 0;
3784 int nonstatic_byte_space_offset = 0;
3785
3786 // Try to squeeze some of the fields into the gaps due to
3787 // long/double alignment.
3788 if (nonstatic_double_count > 0) {
3789 int offset = next_nonstatic_double_offset;
3790 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3791 if (compact_fields && offset != next_nonstatic_double_offset) {
3792 // Allocate available fields into the gap before double field.
3793 int length = next_nonstatic_double_offset - offset;
3794 assert(length == BytesPerInt, "");
3795 nonstatic_word_space_offset = offset;
3796 if (nonstatic_word_count > 0) {
3797 nonstatic_word_count -= 1;
3798 nonstatic_word_space_count = 1; // Only one will fit
3799 length -= BytesPerInt;
3800 offset += BytesPerInt;
3801 }
3802 nonstatic_short_space_offset = offset;
3803 while (length >= BytesPerShort && nonstatic_short_count > 0) {
3804 nonstatic_short_count -= 1;
3805 nonstatic_short_space_count += 1;
3806 length -= BytesPerShort;
3807 offset += BytesPerShort;
3808 }
3809 nonstatic_byte_space_offset = offset;
3810 while (length > 0 && nonstatic_byte_count > 0) {
3811 nonstatic_byte_count -= 1;
3812 nonstatic_byte_space_count += 1;
3813 length -= 1;
3814 }
3815 // Allocate oop field in the gap if there are no other fields for that.
3816 nonstatic_oop_space_offset = offset;
3817 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3818 allocation_style != 0) { // when oop fields not first
3819 nonstatic_oop_count -= 1;
3820 nonstatic_oop_space_count = 1; // Only one will fit
3821 length -= heapOopSize;
3822 offset += heapOopSize;
3823 }
3824 }
3825 }
3826
3827 int next_nonstatic_word_offset = next_nonstatic_double_offset +
3828 (nonstatic_double_count * BytesPerLong);
3829 int next_nonstatic_short_offset = next_nonstatic_word_offset +
3830 (nonstatic_word_count * BytesPerInt);
3831 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3832 (nonstatic_short_count * BytesPerShort);
3833 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3834 nonstatic_byte_count;
3835
3836 // let oops jump before padding with this allocation style
3837 if( allocation_style == 1 ) {
3838 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3839 if( nonstatic_oop_count > 0 ) {
3840 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3841 }
3842 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3843 }
3844
3845 // Iterate over fields again and compute correct offsets.
3846 // The field allocation type was temporarily stored in the offset slot.
3847 // oop fields are located before non-oop fields (static and non-static).
3848 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3849
3850 // skip already laid out fields
3851 if (fs.is_offset_set()) continue;
3852
3853 // contended instance fields are handled below
3854 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3855
3856 int real_offset = 0;
3857 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3858
3859 // pack the rest of the fields
3860 switch (atype) {
3861 case STATIC_OOP:
3862 real_offset = next_static_oop_offset;
3863 next_static_oop_offset += heapOopSize;
3864 break;
3865 case STATIC_BYTE:
3866 real_offset = next_static_byte_offset;
3867 next_static_byte_offset += 1;
3868 break;
3869 case STATIC_SHORT:
3870 real_offset = next_static_short_offset;
3871 next_static_short_offset += BytesPerShort;
3872 break;
3873 case STATIC_WORD:
3874 real_offset = next_static_word_offset;
3875 next_static_word_offset += BytesPerInt;
3876 break;
3877 case STATIC_DOUBLE:
3878 real_offset = next_static_double_offset;
3879 next_static_double_offset += BytesPerLong;
3880 break;
3881 case NONSTATIC_OOP:
3882 if( nonstatic_oop_space_count > 0 ) {
3883 real_offset = nonstatic_oop_space_offset;
3884 nonstatic_oop_space_offset += heapOopSize;
3885 nonstatic_oop_space_count -= 1;
3886 } else {
3887 real_offset = next_nonstatic_oop_offset;
3888 next_nonstatic_oop_offset += heapOopSize;
3889 }
3890
3891 // Record this oop in the oop maps
3892 if( nonstatic_oop_map_count > 0 &&
3893 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3894 real_offset -
3895 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3896 heapOopSize ) {
3897 // This oop is adjacent to the previous one, add to current oop map
3898 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3899 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3900 } else {
3901 // This oop is not adjacent to the previous one, create new oop map
3902 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3903 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3904 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3905 nonstatic_oop_map_count += 1;
3906 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3907 first_nonstatic_oop_offset = real_offset;
3908 }
3909 }
3910 break;
3911 case NONSTATIC_BYTE:
3912 if( nonstatic_byte_space_count > 0 ) {
3913 real_offset = nonstatic_byte_space_offset;
3914 nonstatic_byte_space_offset += 1;
3915 nonstatic_byte_space_count -= 1;
3916 } else {
3917 real_offset = next_nonstatic_byte_offset;
3918 next_nonstatic_byte_offset += 1;
3919 }
3920 break;
3921 case NONSTATIC_SHORT:
3922 if( nonstatic_short_space_count > 0 ) {
3923 real_offset = nonstatic_short_space_offset;
3924 nonstatic_short_space_offset += BytesPerShort;
3925 nonstatic_short_space_count -= 1;
3926 } else {
3927 real_offset = next_nonstatic_short_offset;
3928 next_nonstatic_short_offset += BytesPerShort;
3929 }
3930 break;
3931 case NONSTATIC_WORD:
3932 if( nonstatic_word_space_count > 0 ) {
3933 real_offset = nonstatic_word_space_offset;
3934 nonstatic_word_space_offset += BytesPerInt;
3935 nonstatic_word_space_count -= 1;
3936 } else {
3937 real_offset = next_nonstatic_word_offset;
3938 next_nonstatic_word_offset += BytesPerInt;
3939 }
3940 break;
3941 case NONSTATIC_DOUBLE:
3942 real_offset = next_nonstatic_double_offset;
3943 next_nonstatic_double_offset += BytesPerLong;
3944 break;
3945 default:
3946 ShouldNotReachHere();
3947 }
3948 fs.set_offset(real_offset);
3949 }
3950
3951
3952 // Handle the contended cases.
3953 //
3954 // Each contended field should not intersect the cache line with another contended field.
3955 // In the absence of alignment information, we end up with pessimistically separating
3956 // the fields with full-width padding.
3957 //
3958 // Additionally, this should not break alignment for the fields, so we round the alignment up
3959 // for each field.
3960 if (nonstatic_contended_count > 0) {
3961
3962 // if there is at least one contended field, we need to have pre-padding for them
3963 next_nonstatic_padded_offset += ContendedPaddingWidth;
3964
3965 // collect all contended groups
3966 ResourceBitMap bm(cp->size());
3967 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3968 // skip already laid out fields
3969 if (fs.is_offset_set()) continue;
3970
3971 if (fs.is_contended()) {
3972 bm.set_bit(fs.contended_group());
3973 }
3974 }
3975
3976 int current_group = -1;
3977 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3978
3979 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3980
3981 // skip already laid out fields
3982 if (fs.is_offset_set()) continue;
3983
3984 // skip non-contended fields and fields from different group
3985 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3986
3987 // handle statics below
3988 if (fs.access_flags().is_static()) continue;
3989
3990 int real_offset = 0;
3991 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3992
3993 switch (atype) {
3994 case NONSTATIC_BYTE:
3995 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
3996 real_offset = next_nonstatic_padded_offset;
3997 next_nonstatic_padded_offset += 1;
3998 break;
3999
4000 case NONSTATIC_SHORT:
4001 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
4002 real_offset = next_nonstatic_padded_offset;
4003 next_nonstatic_padded_offset += BytesPerShort;
4004 break;
4005
4006 case NONSTATIC_WORD:
4007 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4008 real_offset = next_nonstatic_padded_offset;
4009 next_nonstatic_padded_offset += BytesPerInt;
4010 break;
4011
4012 case NONSTATIC_DOUBLE:
4013 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4014 real_offset = next_nonstatic_padded_offset;
4015 next_nonstatic_padded_offset += BytesPerLong;
4016 break;
4017
4018 case NONSTATIC_OOP:
4019 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4020 real_offset = next_nonstatic_padded_offset;
4021 next_nonstatic_padded_offset += heapOopSize;
4022
4023 // Record this oop in the oop maps
4024 if( nonstatic_oop_map_count > 0 &&
4025 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4026 real_offset -
4027 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4028 heapOopSize ) {
4029 // This oop is adjacent to the previous one, add to current oop map
4030 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4031 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4032 } else {
4033 // This oop is not adjacent to the previous one, create new oop map
4034 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4035 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4036 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4037 nonstatic_oop_map_count += 1;
4038 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4039 first_nonstatic_oop_offset = real_offset;
4040 }
4041 }
4042 break;
4043
4044 default:
4045 ShouldNotReachHere();
4046 }
4047
4048 if (fs.contended_group() == 0) {
4049 // Contended group defines the equivalence class over the fields:
4050 // the fields within the same contended group are not inter-padded.
4051 // The only exception is default group, which does not incur the
4052 // equivalence, and so requires intra-padding.
4053 next_nonstatic_padded_offset += ContendedPaddingWidth;
4054 }
4055
4056 fs.set_offset(real_offset);
4057 } // for
4058
4059 // Start laying out the next group.
4060 // Note that this will effectively pad the last group in the back;
4061 // this is expected to alleviate memory contention effects for
4062 // subclass fields and/or adjacent object.
4063 // If this was the default group, the padding is already in place.
4064 if (current_group != 0) {
4065 next_nonstatic_padded_offset += ContendedPaddingWidth;
4066 }
4067 }
4068
4069 // handle static fields
4070 }
4071
4072 // Entire class is contended, pad in the back.
4073 // This helps to alleviate memory contention effects for subclass fields
4074 // and/or adjacent object.
4075 if (is_contended_class) {
4076 next_nonstatic_padded_offset += ContendedPaddingWidth;
4077 }
4078
4079 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4080
4081 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
4082 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4083 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
4084
4085 int static_field_size = (static_fields_end -
4086 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4087 nonstatic_field_size = nonstatic_field_size +
4088 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4089
4090 int instance_size = align_object_size(instance_end / wordSize);
4091
4092 assert(instance_size == align_object_size(align_size_up(
4093 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4094 wordSize) / wordSize), "consistent layout helper value");
4095
4096 // Invariant: nonstatic_field end/start should only change if there are
4097 // nonstatic fields in the class, or if the class is contended. We compare
4098 // against the non-aligned value, so that end alignment will not fail the
4099 // assert without actually having the fields.
4100 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4101 is_contended_class ||
4102 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4103
4104 // Number of non-static oop map blocks allocated at end of klass.
4105 const unsigned int total_oop_map_count =
4106 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4107 first_nonstatic_oop_offset);
4108
4109 #ifndef PRODUCT
4110 if (PrintFieldLayout) {
4111 print_field_layout(_class_name,
4112 _fields,
4113 cp,
4114 instance_size,
4115 nonstatic_fields_start,
4116 nonstatic_fields_end,
4117 static_fields_end);
4118 }
4119
4120 #endif
4121 // Pass back information needed for InstanceKlass creation
4122 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4123 info->nonstatic_oop_counts = nonstatic_oop_counts;
4124 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4125 info->total_oop_map_count = total_oop_map_count;
4126 info->instance_size = instance_size;
4127 info->static_field_size = static_field_size;
4128 info->nonstatic_field_size = nonstatic_field_size;
4129 info->has_nonstatic_fields = has_nonstatic_fields;
4130 }
4131
4132 static void fill_oop_maps(const InstanceKlass* k,
4133 unsigned int nonstatic_oop_map_count,
4134 const int* nonstatic_oop_offsets,
4135 const unsigned int* nonstatic_oop_counts) {
4136
4137 assert(k != NULL, "invariant");
4138
4139 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4140 const InstanceKlass* const super = k->superklass();
4141 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4142 if (super_count > 0) {
4143 // Copy maps from superklass
4144 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4145 for (unsigned int i = 0; i < super_count; ++i) {
4146 *this_oop_map++ = *super_oop_map++;
4147 }
4148 }
4149
4150 if (nonstatic_oop_map_count > 0) {
4151 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4152 // The counts differ because there is no gap between superklass's last oop
4153 // field and the first local oop field. Extend the last oop map copied
4154 // from the superklass instead of creating new one.
4155 nonstatic_oop_map_count--;
4156 nonstatic_oop_offsets++;
4157 this_oop_map--;
4158 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4159 this_oop_map++;
4160 }
4161
4162 // Add new map blocks, fill them
4163 while (nonstatic_oop_map_count-- > 0) {
4164 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4165 this_oop_map->set_count(*nonstatic_oop_counts++);
4166 this_oop_map++;
4167 }
4168 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4169 this_oop_map, "sanity");
4170 }
4171 }
4172
4173
4174 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4175 assert(ik != NULL, "invariant");
4176
4177 const Klass* const super = ik->super();
4178
4179 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4180 // in which case we don't have to register objects as finalizable
4181 if (!_has_empty_finalizer) {
4182 if (_has_finalizer ||
4183 (super != NULL && super->has_finalizer())) {
4184 ik->set_has_finalizer();
4185 }
4186 }
4187
4188 #ifdef ASSERT
4189 bool f = false;
4190 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4191 vmSymbols::void_method_signature());
4192 if (m != NULL && !m->is_empty_method()) {
4193 f = true;
4194 }
4195
4196 // Spec doesn't prevent agent from redefinition of empty finalizer.
4197 // Despite the fact that it's generally bad idea and redefined finalizer
4198 // will not work as expected we shouldn't abort vm in this case
4199 if (!ik->has_redefined_this_or_super()) {
4200 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4201 }
4202 #endif
4203
4204 // Check if this klass supports the java.lang.Cloneable interface
4205 if (SystemDictionary::Cloneable_klass_loaded()) {
4206 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4207 ik->set_is_cloneable();
4208 }
4209 }
4210
4211 // Check if this klass has a vanilla default constructor
4212 if (super == NULL) {
4213 // java.lang.Object has empty default constructor
4214 ik->set_has_vanilla_constructor();
4215 } else {
4216 if (super->has_vanilla_constructor() &&
4217 _has_vanilla_constructor) {
4218 ik->set_has_vanilla_constructor();
4219 }
4220 #ifdef ASSERT
4221 bool v = false;
4222 if (super->has_vanilla_constructor()) {
4223 const Method* const constructor =
4224 ik->find_method(vmSymbols::object_initializer_name(),
4225 vmSymbols::void_method_signature());
4226 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4227 v = true;
4228 }
4229 }
4230 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4231 #endif
4232 }
4233
4234 // If it cannot be fast-path allocated, set a bit in the layout helper.
4235 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4236 assert(ik->size_helper() > 0, "layout_helper is initialized");
4237 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4238 || ik->is_abstract() || ik->is_interface()
4239 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4240 || ik->size_helper() >= FastAllocateSizeLimit) {
4241 // Forbid fast-path allocation.
4242 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4243 ik->set_layout_helper(lh);
4244 }
4245 }
4246
4247 // Attach super classes and interface classes to class loader data
4248 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4249 TRAPS) {
4250 assert(defined_klass != NULL, "invariant");
4251
4252 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4253 if (defining_loader_data->is_the_null_class_loader_data()) {
4254 // Dependencies to null class loader data are implicit.
4255 return;
4256 } else {
4257 // add super class dependency
4258 Klass* const super = defined_klass->super();
4259 if (super != NULL) {
4260 defining_loader_data->record_dependency(super, CHECK);
4261 }
4262
4263 // add super interface dependencies
4264 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4265 if (local_interfaces != NULL) {
4266 const int length = local_interfaces->length();
4267 for (int i = 0; i < length; i++) {
4268 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4269 }
4270 }
4271 }
4272 }
4273
4274 // utility methods for appending an array with check for duplicates
4275
4276 static void append_interfaces(GrowableArray<Klass*>* result,
4277 const Array<Klass*>* const ifs) {
4278 // iterate over new interfaces
4279 for (int i = 0; i < ifs->length(); i++) {
4280 Klass* const e = ifs->at(i);
4281 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4282 // add new interface
4283 result->append_if_missing(e);
4284 }
4285 }
4286
4287 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4288 Array<Klass*>* local_ifs,
4289 ClassLoaderData* loader_data,
4290 TRAPS) {
4291 assert(local_ifs != NULL, "invariant");
4292 assert(loader_data != NULL, "invariant");
4293
4294 // Compute maximum size for transitive interfaces
4295 int max_transitive_size = 0;
4296 int super_size = 0;
4297 // Add superclass transitive interfaces size
4298 if (super != NULL) {
4299 super_size = super->transitive_interfaces()->length();
4300 max_transitive_size += super_size;
4301 }
4302 // Add local interfaces' super interfaces
4303 const int local_size = local_ifs->length();
4304 for (int i = 0; i < local_size; i++) {
4305 Klass* const l = local_ifs->at(i);
4306 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4307 }
4308 // Finally add local interfaces
4309 max_transitive_size += local_size;
4310 // Construct array
4311 if (max_transitive_size == 0) {
4312 // no interfaces, use canonicalized array
4313 return Universe::the_empty_klass_array();
4314 } else if (max_transitive_size == super_size) {
4315 // no new local interfaces added, share superklass' transitive interface array
4316 return super->transitive_interfaces();
4317 } else if (max_transitive_size == local_size) {
4318 // only local interfaces added, share local interface array
4319 return local_ifs;
4320 } else {
4321 ResourceMark rm;
4322 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4323
4324 // Copy down from superclass
4325 if (super != NULL) {
4326 append_interfaces(result, super->transitive_interfaces());
4327 }
4328
4329 // Copy down from local interfaces' superinterfaces
4330 for (int i = 0; i < local_size; i++) {
4331 Klass* const l = local_ifs->at(i);
4332 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4333 }
4334 // Finally add local interfaces
4335 append_interfaces(result, local_ifs);
4336
4337 // length will be less than the max_transitive_size if duplicates were removed
4338 const int length = result->length();
4339 assert(length <= max_transitive_size, "just checking");
4340 Array<Klass*>* const new_result =
4341 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4342 for (int i = 0; i < length; i++) {
4343 Klass* const e = result->at(i);
4344 assert(e != NULL, "just checking");
4345 new_result->at_put(i, e);
4346 }
4347 return new_result;
4348 }
4349 }
4350
4351 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4352 assert(this_klass != NULL, "invariant");
4353 const Klass* const super = this_klass->super();
4354 if (super != NULL) {
4355 Reflection::VerifyClassAccessResults vca_result =
4356 Reflection::verify_class_access(this_klass, super, false);
4357 if (vca_result != Reflection::ACCESS_OK) {
4358 ResourceMark rm(THREAD);
4359 char* msg = Reflection::verify_class_access_msg(this_klass, super, vca_result);
4360 if (msg == NULL) {
4361 ResourceMark rm(THREAD);
4362 Exceptions::fthrow(
4363 THREAD_AND_LOCATION,
4364 vmSymbols::java_lang_IllegalAccessError(),
4365 "class %s cannot access its superclass %s",
4366 this_klass->external_name(),
4367 super->external_name());
4368 } else {
4369 // Add additional message content.
4370 Exceptions::fthrow(
4371 THREAD_AND_LOCATION,
4372 vmSymbols::java_lang_IllegalAccessError(),
4373 "superclass access check failed: %s",
4374 msg);
4375 }
4376 }
4377 }
4378 }
4379
4380
4381 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4382 assert(this_klass != NULL, "invariant");
4383 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4384 const int lng = local_interfaces->length();
4385 for (int i = lng - 1; i >= 0; i--) {
4386 Klass* const k = local_interfaces->at(i);
4387 assert (k != NULL && k->is_interface(), "invalid interface");
4388 Reflection::VerifyClassAccessResults vca_result =
4389 Reflection::verify_class_access(this_klass, k, false);
4390 if (vca_result != Reflection::ACCESS_OK) {
4391 ResourceMark rm(THREAD);
4392 char* msg = Reflection::verify_class_access_msg(this_klass, k, vca_result);
4393 if (msg == NULL) {
4394 Exceptions::fthrow(
4395 THREAD_AND_LOCATION,
4396 vmSymbols::java_lang_IllegalAccessError(),
4397 "class %s cannot access its superinterface %s",
4398 this_klass->external_name(),
4399 k->external_name());
4400 } else {
4401 // Add additional message content.
4402 Exceptions::fthrow(
4403 THREAD_AND_LOCATION,
4404 vmSymbols::java_lang_IllegalAccessError(),
4405 "superinterface check failed: %s",
4406 msg);
4407 }
4408 }
4409 }
4410 }
4411
4412
4413 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4414 assert(this_klass != NULL, "invariant");
4415 const Array<Method*>* const methods = this_klass->methods();
4416 const int num_methods = methods->length();
4417
4418 // go thru each method and check if it overrides a final method
4419 for (int index = 0; index < num_methods; index++) {
4420 const Method* const m = methods->at(index);
4421
4422 // skip private, static, and <init> methods
4423 if ((!m->is_private() && !m->is_static()) &&
4424 (m->name() != vmSymbols::object_initializer_name())) {
4425
4426 const Symbol* const name = m->name();
4427 const Symbol* const signature = m->signature();
4428 const Klass* k = this_klass->super();
4429 const Method* super_m = NULL;
4430 while (k != NULL) {
4431 // skip supers that don't have final methods.
4432 if (k->has_final_method()) {
4433 // lookup a matching method in the super class hierarchy
4434 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4435 if (super_m == NULL) {
4436 break; // didn't find any match; get out
4437 }
4438
4439 if (super_m->is_final() && !super_m->is_static() &&
4440 // matching method in super is final, and not static
4441 (Reflection::verify_field_access(this_klass,
4442 super_m->method_holder(),
4443 super_m->method_holder(),
4444 super_m->access_flags(), false))
4445 // this class can access super final method and therefore override
4446 ) {
4447 ResourceMark rm(THREAD);
4448 Exceptions::fthrow(
4449 THREAD_AND_LOCATION,
4450 vmSymbols::java_lang_VerifyError(),
4451 "class %s overrides final method %s.%s%s",
4452 this_klass->external_name(),
4453 super_m->method_holder()->external_name(),
4454 name->as_C_string(),
4455 signature->as_C_string()
4456 );
4457 return;
4458 }
4459
4460 // continue to look from super_m's holder's super.
4461 k = super_m->method_holder()->super();
4462 continue;
4463 }
4464
4465 k = k->super();
4466 }
4467 }
4468 }
4469 }
4470
4471
4472 // assumes that this_klass is an interface
4473 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4474 assert(this_klass != NULL, "invariant");
4475 assert(this_klass->is_interface(), "not an interface");
4476 const Array<Method*>* methods = this_klass->methods();
4477 const int num_methods = methods->length();
4478
4479 for (int index = 0; index < num_methods; index++) {
4480 const Method* const m = methods->at(index);
4481 // if m is static and not the init method, throw a verify error
4482 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4483 ResourceMark rm(THREAD);
4484 Exceptions::fthrow(
4485 THREAD_AND_LOCATION,
4486 vmSymbols::java_lang_VerifyError(),
4487 "Illegal static method %s in interface %s",
4488 m->name()->as_C_string(),
4489 this_klass->external_name()
4490 );
4491 return;
4492 }
4493 }
4494 }
4495
4496 // utility methods for format checking
4497
4498 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4499 if (!_need_verify) { return; }
4500
4501 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4502 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4503 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4504 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4505 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4506 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4507 const bool is_module_info= (flags & JVM_ACC_MODULE) != 0;
4508 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4509
4510 if ((is_abstract && is_final) ||
4511 (is_interface && !is_abstract) ||
4512 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4513 (!is_interface && major_gte_15 && is_annotation) ||
4514 is_module_info) {
4515 ResourceMark rm(THREAD);
4516 Exceptions::fthrow(
4517 THREAD_AND_LOCATION,
4518 vmSymbols::java_lang_ClassFormatError(),
4519 "Illegal class modifiers in class %s: 0x%X",
4520 _class_name->as_C_string(), flags
4521 );
4522 return;
4523 }
4524 }
4525
4526 static bool has_illegal_visibility(jint flags) {
4527 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4528 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4529 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4530
4531 return ((is_public && is_protected) ||
4532 (is_public && is_private) ||
4533 (is_protected && is_private));
4534 }
4535
4536 static bool is_supported_version(u2 major, u2 minor){
4537 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4538 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4539 (major <= max_version) &&
4540 ((major != max_version) ||
4541 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4542 }
4543
4544 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4545 bool is_interface,
4546 TRAPS) const {
4547 if (!_need_verify) { return; }
4548
4549 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4550 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4551 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4552 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4553 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4554 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4555 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4556 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4557 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4558
4559 bool is_illegal = false;
4560
4561 if (is_interface) {
4562 if (!is_public || !is_static || !is_final || is_private ||
4563 is_protected || is_volatile || is_transient ||
4564 (major_gte_15 && is_enum)) {
4565 is_illegal = true;
4566 }
4567 } else { // not interface
4568 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4569 is_illegal = true;
4570 }
4571 }
4572
4573 if (is_illegal) {
4574 ResourceMark rm(THREAD);
4575 Exceptions::fthrow(
4576 THREAD_AND_LOCATION,
4577 vmSymbols::java_lang_ClassFormatError(),
4578 "Illegal field modifiers in class %s: 0x%X",
4579 _class_name->as_C_string(), flags);
4580 return;
4581 }
4582 }
4583
4584 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4585 bool is_interface,
4586 const Symbol* name,
4587 TRAPS) const {
4588 if (!_need_verify) { return; }
4589
4590 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4591 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4592 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4593 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4594 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4595 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4596 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4597 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4598 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4599 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4600 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4601 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4602 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4603
4604 bool is_illegal = false;
4605
4606 if (is_interface) {
4607 if (major_gte_8) {
4608 // Class file version is JAVA_8_VERSION or later Methods of
4609 // interfaces may set any of the flags except ACC_PROTECTED,
4610 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4611 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4612 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4613 (is_native || is_protected || is_final || is_synchronized) ||
4614 // If a specific method of a class or interface has its
4615 // ACC_ABSTRACT flag set, it must not have any of its
4616 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4617 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4618 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4619 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4620 (is_abstract && (is_private || is_static || is_strict))) {
4621 is_illegal = true;
4622 }
4623 } else if (major_gte_15) {
4624 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4625 if (!is_public || is_private || is_protected || is_static || is_final ||
4626 is_synchronized || is_native || !is_abstract || is_strict) {
4627 is_illegal = true;
4628 }
4629 } else {
4630 // Class file version is pre-JAVA_1_5_VERSION
4631 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4632 is_illegal = true;
4633 }
4634 }
4635 } else { // not interface
4636 if (has_illegal_visibility(flags)) {
4637 is_illegal = true;
4638 } else {
4639 if (is_initializer) {
4640 if (is_static || is_final || is_synchronized || is_native ||
4641 is_abstract || (major_gte_15 && is_bridge)) {
4642 is_illegal = true;
4643 }
4644 } else { // not initializer
4645 if (is_abstract) {
4646 if ((is_final || is_native || is_private || is_static ||
4647 (major_gte_15 && (is_synchronized || is_strict)))) {
4648 is_illegal = true;
4649 }
4650 }
4651 }
4652 }
4653 }
4654
4655 if (is_illegal) {
4656 ResourceMark rm(THREAD);
4657 Exceptions::fthrow(
4658 THREAD_AND_LOCATION,
4659 vmSymbols::java_lang_ClassFormatError(),
4660 "Method %s in class %s has illegal modifiers: 0x%X",
4661 name->as_C_string(), _class_name->as_C_string(), flags);
4662 return;
4663 }
4664 }
4665
4666 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4667 int length,
4668 TRAPS) const {
4669 assert(_need_verify, "only called when _need_verify is true");
4670 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4671 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4672 }
4673 }
4674
4675 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4676 // In class names, '/' separates unqualified names. This is verified in this function also.
4677 // Method names also may not contain the characters '<' or '>', unless <init>
4678 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4679 // method. Because these names have been checked as special cases before
4680 // calling this method in verify_legal_method_name.
4681 //
4682 // This method is also called from the modular system APIs in modules.cpp
4683 // to verify the validity of module and package names.
4684 bool ClassFileParser::verify_unqualified_name(const char* name,
4685 unsigned int length,
4686 int type) {
4687 for (const char* p = name; p != name + length;) {
4688 jchar ch = *p;
4689 if (ch < 128) {
4690 if (ch == '.') {
4691 // permit '.' in module names unless it's the first char, or
4692 // preceding char is also a '.', or last char is a '.'.
4693 if ((type != ClassFileParser::LegalModule) ||
4694 (p == name) || (*(p-1) == '.') ||
4695 (p == name + length - 1)) {
4696 return false;
4697 }
4698 }
4699 if (ch == ';' || ch == '[' ) {
4700 return false; // do not permit '.', ';', or '['
4701 }
4702 if (ch == '/') {
4703 // check for '//' or leading or trailing '/' which are not legal
4704 // unqualified name must not be empty
4705 if (type == ClassFileParser::LegalClass) {
4706 if (p == name || p+1 >= name+length || *(p+1) == '/') {
4707 return false;
4708 }
4709 } else {
4710 return false; // do not permit '/' unless it's class name
4711 }
4712 }
4713 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
4714 return false; // do not permit '<' or '>' in method names
4715 }
4716 p++;
4717 } else {
4718 char* tmp_p = UTF8::next(p, &ch);
4719 p = tmp_p;
4720 }
4721 }
4722 return true;
4723 }
4724
4725 // Take pointer to a string. Skip over the longest part of the string that could
4726 // be taken as a fieldname. Allow '/' if slash_ok is true.
4727 // Return a pointer to just past the fieldname.
4728 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4729 // being true, we saw consecutive slashes (meaning we were looking for a
4730 // qualified path but found something that was badly-formed).
4731 static const char* skip_over_field_name(const char* name,
4732 bool slash_ok,
4733 unsigned int length) {
4734 const char* p;
4735 jboolean last_is_slash = false;
4736 jboolean not_first_ch = false;
4737
4738 for (p = name; p != name + length; not_first_ch = true) {
4739 const char* old_p = p;
4740 jchar ch = *p;
4741 if (ch < 128) {
4742 p++;
4743 // quick check for ascii
4744 if ((ch >= 'a' && ch <= 'z') ||
4745 (ch >= 'A' && ch <= 'Z') ||
4746 (ch == '_' || ch == '$') ||
4747 (not_first_ch && ch >= '0' && ch <= '9')) {
4748 last_is_slash = false;
4749 continue;
4750 }
4751 if (slash_ok && ch == '/') {
4752 if (last_is_slash) {
4753 return NULL; // Don't permit consecutive slashes
4754 }
4755 last_is_slash = true;
4756 continue;
4757 }
4758 }
4759 else {
4760 jint unicode_ch;
4761 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4762 p = tmp_p;
4763 last_is_slash = false;
4764 // Check if ch is Java identifier start or is Java identifier part
4765 // 4672820: call java.lang.Character methods directly without generating separate tables.
4766 EXCEPTION_MARK;
4767
4768 // return value
4769 JavaValue result(T_BOOLEAN);
4770 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4771 JavaCallArguments args;
4772 args.push_int(unicode_ch);
4773
4774 // public static boolean isJavaIdentifierStart(char ch);
4775 JavaCalls::call_static(&result,
4776 SystemDictionary::Character_klass(),
4777 vmSymbols::isJavaIdentifierStart_name(),
4778 vmSymbols::int_bool_signature(),
4779 &args,
4780 THREAD);
4781
4782 if (HAS_PENDING_EXCEPTION) {
4783 CLEAR_PENDING_EXCEPTION;
4784 return 0;
4785 }
4786 if (result.get_jboolean()) {
4787 continue;
4788 }
4789
4790 if (not_first_ch) {
4791 // public static boolean isJavaIdentifierPart(char ch);
4792 JavaCalls::call_static(&result,
4793 SystemDictionary::Character_klass(),
4794 vmSymbols::isJavaIdentifierPart_name(),
4795 vmSymbols::int_bool_signature(),
4796 &args,
4797 THREAD);
4798
4799 if (HAS_PENDING_EXCEPTION) {
4800 CLEAR_PENDING_EXCEPTION;
4801 return 0;
4802 }
4803
4804 if (result.get_jboolean()) {
4805 continue;
4806 }
4807 }
4808 }
4809 return (not_first_ch) ? old_p : NULL;
4810 }
4811 return (not_first_ch) ? p : NULL;
4812 }
4813
4814 // Take pointer to a string. Skip over the longest part of the string that could
4815 // be taken as a field signature. Allow "void" if void_ok.
4816 // Return a pointer to just past the signature.
4817 // Return NULL if no legal signature is found.
4818 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4819 bool void_ok,
4820 unsigned int length,
4821 TRAPS) const {
4822 unsigned int array_dim = 0;
4823 while (length > 0) {
4824 switch (signature[0]) {
4825 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4826 case JVM_SIGNATURE_BOOLEAN:
4827 case JVM_SIGNATURE_BYTE:
4828 case JVM_SIGNATURE_CHAR:
4829 case JVM_SIGNATURE_SHORT:
4830 case JVM_SIGNATURE_INT:
4831 case JVM_SIGNATURE_FLOAT:
4832 case JVM_SIGNATURE_LONG:
4833 case JVM_SIGNATURE_DOUBLE:
4834 return signature + 1;
4835 case JVM_SIGNATURE_CLASS: {
4836 if (_major_version < JAVA_1_5_VERSION) {
4837 // Skip over the class name if one is there
4838 const char* const p = skip_over_field_name(signature + 1, true, --length);
4839
4840 // The next character better be a semicolon
4841 if (p && (p - signature) > 1 && p[0] == ';') {
4842 return p + 1;
4843 }
4844 }
4845 else {
4846 // 4900761: For class version > 48, any unicode is allowed in class name.
4847 length--;
4848 signature++;
4849 while (length > 0 && signature[0] != ';') {
4850 if (signature[0] == '.') {
4851 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4852 }
4853 length--;
4854 signature++;
4855 }
4856 if (signature[0] == ';') { return signature + 1; }
4857 }
4858
4859 return NULL;
4860 }
4861 case JVM_SIGNATURE_ARRAY:
4862 array_dim++;
4863 if (array_dim > 255) {
4864 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4865 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4866 }
4867 // The rest of what's there better be a legal signature
4868 signature++;
4869 length--;
4870 void_ok = false;
4871 break;
4872
4873 default:
4874 return NULL;
4875 }
4876 }
4877 return NULL;
4878 }
4879
4880 // Checks if name is a legal class name.
4881 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4882 if (!_need_verify || _relax_verify) { return; }
4883
4884 char buf[fixed_buffer_size];
4885 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4886 unsigned int length = name->utf8_length();
4887 bool legal = false;
4888
4889 if (length > 0) {
4890 const char* p;
4891 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4892 p = skip_over_field_signature(bytes, false, length, CHECK);
4893 legal = (p != NULL) && ((p - bytes) == (int)length);
4894 } else if (_major_version < JAVA_1_5_VERSION) {
4895 if (bytes[0] != '<') {
4896 p = skip_over_field_name(bytes, true, length);
4897 legal = (p != NULL) && ((p - bytes) == (int)length);
4898 }
4899 } else {
4900 // 4900761: relax the constraints based on JSR202 spec
4901 // Class names may be drawn from the entire Unicode character set.
4902 // Identifiers between '/' must be unqualified names.
4903 // The utf8 string has been verified when parsing cpool entries.
4904 legal = verify_unqualified_name(bytes, length, LegalClass);
4905 }
4906 }
4907 if (!legal) {
4908 ResourceMark rm(THREAD);
4909 assert(_class_name != NULL, "invariant");
4910 Exceptions::fthrow(
4911 THREAD_AND_LOCATION,
4912 vmSymbols::java_lang_ClassFormatError(),
4913 "Illegal class name \"%s\" in class file %s", bytes,
4914 _class_name->as_C_string()
4915 );
4916 return;
4917 }
4918 }
4919
4920 // Checks if name is a legal field name.
4921 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4922 if (!_need_verify || _relax_verify) { return; }
4923
4924 char buf[fixed_buffer_size];
4925 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4926 unsigned int length = name->utf8_length();
4927 bool legal = false;
4928
4929 if (length > 0) {
4930 if (_major_version < JAVA_1_5_VERSION) {
4931 if (bytes[0] != '<') {
4932 const char* p = skip_over_field_name(bytes, false, length);
4933 legal = (p != NULL) && ((p - bytes) == (int)length);
4934 }
4935 } else {
4936 // 4881221: relax the constraints based on JSR202 spec
4937 legal = verify_unqualified_name(bytes, length, LegalField);
4938 }
4939 }
4940
4941 if (!legal) {
4942 ResourceMark rm(THREAD);
4943 assert(_class_name != NULL, "invariant");
4944 Exceptions::fthrow(
4945 THREAD_AND_LOCATION,
4946 vmSymbols::java_lang_ClassFormatError(),
4947 "Illegal field name \"%s\" in class %s", bytes,
4948 _class_name->as_C_string()
4949 );
4950 return;
4951 }
4952 }
4953
4954 // Checks if name is a legal method name.
4955 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4956 if (!_need_verify || _relax_verify) { return; }
4957
4958 assert(name != NULL, "method name is null");
4959 char buf[fixed_buffer_size];
4960 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4961 unsigned int length = name->utf8_length();
4962 bool legal = false;
4963
4964 if (length > 0) {
4965 if (bytes[0] == '<') {
4966 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4967 legal = true;
4968 }
4969 } else if (_major_version < JAVA_1_5_VERSION) {
4970 const char* p;
4971 p = skip_over_field_name(bytes, false, length);
4972 legal = (p != NULL) && ((p - bytes) == (int)length);
4973 } else {
4974 // 4881221: relax the constraints based on JSR202 spec
4975 legal = verify_unqualified_name(bytes, length, LegalMethod);
4976 }
4977 }
4978
4979 if (!legal) {
4980 ResourceMark rm(THREAD);
4981 assert(_class_name != NULL, "invariant");
4982 Exceptions::fthrow(
4983 THREAD_AND_LOCATION,
4984 vmSymbols::java_lang_ClassFormatError(),
4985 "Illegal method name \"%s\" in class %s", bytes,
4986 _class_name->as_C_string()
4987 );
4988 return;
4989 }
4990 }
4991
4992
4993 // Checks if signature is a legal field signature.
4994 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
4995 const Symbol* signature,
4996 TRAPS) const {
4997 if (!_need_verify) { return; }
4998
4999 char buf[fixed_buffer_size];
5000 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5001 const unsigned int length = signature->utf8_length();
5002 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5003
5004 if (p == NULL || (p - bytes) != (int)length) {
5005 throwIllegalSignature("Field", name, signature, CHECK);
5006 }
5007 }
5008
5009 // Checks if signature is a legal method signature.
5010 // Returns number of parameters
5011 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5012 const Symbol* signature,
5013 TRAPS) const {
5014 if (!_need_verify) {
5015 // make sure caller's args_size will be less than 0 even for non-static
5016 // method so it will be recomputed in compute_size_of_parameters().
5017 return -2;
5018 }
5019
5020 // Class initializers cannot have args for class format version >= 51.
5021 if (name == vmSymbols::class_initializer_name() &&
5022 signature != vmSymbols::void_method_signature() &&
5023 _major_version >= JAVA_7_VERSION) {
5024 throwIllegalSignature("Method", name, signature, CHECK_0);
5025 return 0;
5026 }
5027
5028 unsigned int args_size = 0;
5029 char buf[fixed_buffer_size];
5030 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5031 unsigned int length = signature->utf8_length();
5032 const char* nextp;
5033
5034 // The first character must be a '('
5035 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5036 length--;
5037 // Skip over legal field signatures
5038 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5039 while ((length > 0) && (nextp != NULL)) {
5040 args_size++;
5041 if (p[0] == 'J' || p[0] == 'D') {
5042 args_size++;
5043 }
5044 length -= nextp - p;
5045 p = nextp;
5046 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5047 }
5048 // The first non-signature thing better be a ')'
5049 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5050 length--;
5051 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5052 // All internal methods must return void
5053 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5054 return args_size;
5055 }
5056 } else {
5057 // Now we better just have a return value
5058 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5059 if (nextp && ((int)length == (nextp - p))) {
5060 return args_size;
5061 }
5062 }
5063 }
5064 }
5065 // Report error
5066 throwIllegalSignature("Method", name, signature, CHECK_0);
5067 return 0;
5068 }
5069
5070 int ClassFileParser::static_field_size() const {
5071 assert(_field_info != NULL, "invariant");
5072 return _field_info->static_field_size;
5073 }
5074
5075 int ClassFileParser::total_oop_map_count() const {
5076 assert(_field_info != NULL, "invariant");
5077 return _field_info->total_oop_map_count;
5078 }
5079
5080 jint ClassFileParser::layout_size() const {
5081 assert(_field_info != NULL, "invariant");
5082 return _field_info->instance_size;
5083 }
5084
5085 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5086 const Array<Method*>* methods) {
5087 assert(ik != NULL, "invariant");
5088 assert(methods != NULL, "invariant");
5089
5090 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5091 // (We used to do this lazily, but now we query it in Rewriter,
5092 // which is eagerly done for every method, so we might as well do it now,
5093 // when everything is fresh in memory.)
5094 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5095
5096 if (klass_id != vmSymbols::NO_SID) {
5097 for (int j = 0; j < methods->length(); ++j) {
5098 Method* method = methods->at(j);
5099 method->init_intrinsic_id();
5100
5101 if (CheckIntrinsics) {
5102 // Check if an intrinsic is defined for method 'method',
5103 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5104 if (method->intrinsic_id() != vmIntrinsics::_none &&
5105 !method->intrinsic_candidate()) {
5106 tty->print("Compiler intrinsic is defined for method [%s], "
5107 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5108 method->name_and_sig_as_C_string(),
5109 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5110 );
5111 tty->cr();
5112 DEBUG_ONLY(vm_exit(1));
5113 }
5114 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5115 // but there is no intrinsic available for it.
5116 if (method->intrinsic_candidate() &&
5117 method->intrinsic_id() == vmIntrinsics::_none) {
5118 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5119 "but no compiler intrinsic is defined for the method.%s",
5120 method->name_and_sig_as_C_string(),
5121 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5122 );
5123 tty->cr();
5124 DEBUG_ONLY(vm_exit(1));
5125 }
5126 }
5127 } // end for
5128
5129 #ifdef ASSERT
5130 if (CheckIntrinsics) {
5131 // Check for orphan methods in the current class. A method m
5132 // of a class C is orphan if an intrinsic is defined for method m,
5133 // but class C does not declare m.
5134 // The check is potentially expensive, therefore it is available
5135 // only in debug builds.
5136
5137 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5138 if (vmIntrinsics::_compiledLambdaForm == id) {
5139 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5140 // generated for the JVM from a LambdaForm and therefore no method
5141 // is defined for it.
5142 continue;
5143 }
5144
5145 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5146 // Check if the current class contains a method with the same
5147 // name, flags, signature.
5148 bool match = false;
5149 for (int j = 0; j < methods->length(); ++j) {
5150 const Method* method = methods->at(j);
5151 if (method->intrinsic_id() == id) {
5152 match = true;
5153 break;
5154 }
5155 }
5156
5157 if (!match) {
5158 char buf[1000];
5159 tty->print("Compiler intrinsic is defined for method [%s], "
5160 "but the method is not available in class [%s].%s",
5161 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5162 buf, sizeof(buf)),
5163 ik->name()->as_C_string(),
5164 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5165 );
5166 tty->cr();
5167 DEBUG_ONLY(vm_exit(1));
5168 }
5169 }
5170 } // end for
5171 } // CheckIntrinsics
5172 #endif // ASSERT
5173 }
5174 }
5175
5176 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5177 if (_klass != NULL) {
5178 return _klass;
5179 }
5180
5181 InstanceKlass* const ik =
5182 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5183
5184 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5185
5186 assert(_klass == ik, "invariant");
5187
5188 return ik;
5189 }
5190
5191 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5192 assert(ik != NULL, "invariant");
5193
5194 set_klass_to_deallocate(ik);
5195
5196 assert(_field_info != NULL, "invariant");
5197 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5198 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5199 "sanity");
5200
5201 assert(ik->is_instance_klass(), "sanity");
5202 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5203
5204 // Fill in information already parsed
5205 ik->set_should_verify_class(_need_verify);
5206
5207 // Not yet: supers are done below to support the new subtype-checking fields
5208 ik->set_class_loader_data(_loader_data);
5209 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5210 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5211 assert(_fac != NULL, "invariant");
5212 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5213
5214 // this transfers ownership of a lot of arrays from
5215 // the parser onto the InstanceKlass*
5216 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5217
5218 // note that is not safe to use the fields in the parser from this point on
5219 assert(NULL == _cp, "invariant");
5220 assert(NULL == _fields, "invariant");
5221 assert(NULL == _methods, "invariant");
5222 assert(NULL == _inner_classes, "invariant");
5223 assert(NULL == _local_interfaces, "invariant");
5224 assert(NULL == _transitive_interfaces, "invariant");
5225 assert(NULL == _combined_annotations, "invariant");
5226
5227 if (_has_final_method) {
5228 ik->set_has_final_method();
5229 }
5230
5231 ik->copy_method_ordering(_method_ordering, CHECK);
5232 // The InstanceKlass::_methods_jmethod_ids cache
5233 // is managed on the assumption that the initial cache
5234 // size is equal to the number of methods in the class. If
5235 // that changes, then InstanceKlass::idnum_can_increment()
5236 // has to be changed accordingly.
5237 ik->set_initial_method_idnum(ik->methods()->length());
5238
5239 ik->set_name(_class_name);
5240
5241 if (is_anonymous()) {
5242 // I am well known to myself
5243 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve
5244 }
5245
5246 ik->set_minor_version(_minor_version);
5247 ik->set_major_version(_major_version);
5248 ik->set_has_default_methods(_has_default_methods);
5249 ik->set_declares_default_methods(_declares_default_methods);
5250
5251 if (_host_klass != NULL) {
5252 assert (ik->is_anonymous(), "should be the same");
5253 ik->set_host_klass(_host_klass);
5254 }
5255
5256 // Set PackageEntry for this_klass
5257 oop cl = ik->class_loader();
5258 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5259 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5260 ik->set_package(cld, CHECK);
5261
5262 const Array<Method*>* const methods = ik->methods();
5263 assert(methods != NULL, "invariant");
5264 const int methods_len = methods->length();
5265
5266 check_methods_for_intrinsics(ik, methods);
5267
5268 // Fill in field values obtained by parse_classfile_attributes
5269 if (_parsed_annotations->has_any_annotations()) {
5270 _parsed_annotations->apply_to(ik);
5271 }
5272
5273 apply_parsed_class_attributes(ik);
5274
5275 // Miranda methods
5276 if ((_num_miranda_methods > 0) ||
5277 // if this class introduced new miranda methods or
5278 (_super_klass != NULL && _super_klass->has_miranda_methods())
5279 // super class exists and this class inherited miranda methods
5280 ) {
5281 ik->set_has_miranda_methods(); // then set a flag
5282 }
5283
5284 // Fill in information needed to compute superclasses.
5285 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5286
5287 // Initialize itable offset tables
5288 klassItable::setup_itable_offset_table(ik);
5289
5290 // Compute transitive closure of interfaces this class implements
5291 // Do final class setup
5292 fill_oop_maps(ik,
5293 _field_info->nonstatic_oop_map_count,
5294 _field_info->nonstatic_oop_offsets,
5295 _field_info->nonstatic_oop_counts);
5296
5297 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5298 set_precomputed_flags(ik);
5299
5300 // check if this class can access its super class
5301 check_super_class_access(ik, CHECK);
5302
5303 // check if this class can access its superinterfaces
5304 check_super_interface_access(ik, CHECK);
5305
5306 // check if this class overrides any final method
5307 check_final_method_override(ik, CHECK);
5308
5309 // check that if this class is an interface then it doesn't have static methods
5310 if (ik->is_interface()) {
5311 /* An interface in a JAVA 8 classfile can be static */
5312 if (_major_version < JAVA_8_VERSION) {
5313 check_illegal_static_method(ik, CHECK);
5314 }
5315 }
5316
5317 // Obtain this_klass' module entry
5318 ModuleEntry* module_entry = ik->module();
5319 assert(module_entry != NULL, "module_entry should always be set");
5320
5321 // Obtain java.lang.reflect.Module
5322 Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module()));
5323
5324 // Allocate mirror and initialize static fields
5325 // The create_mirror() call will also call compute_modifiers()
5326 java_lang_Class::create_mirror(ik,
5327 _loader_data->class_loader(),
5328 module_handle,
5329 _protection_domain,
5330 CHECK);
5331
5332 assert(_all_mirandas != NULL, "invariant");
5333
5334 // Generate any default methods - default methods are interface methods
5335 // that have a default implementation. This is new with Lambda project.
5336 if (_has_default_methods ) {
5337 DefaultMethods::generate_default_methods(ik,
5338 _all_mirandas,
5339 CHECK);
5340 }
5341
5342 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5343 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5344 !module_entry->has_default_read_edges()) {
5345 if (!module_entry->set_has_default_read_edges()) {
5346 // We won a potential race
5347 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5348 }
5349 }
5350
5351 // Update the loader_data graph.
5352 record_defined_class_dependencies(ik, CHECK);
5353
5354 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5355
5356 if (!is_internal()) {
5357 if (log_is_enabled(Info, class, load)) {
5358 ResourceMark rm;
5359 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5360
5361 if (log_is_enabled(Info, class, load)) {
5362 ik->print_loading_log(LogLevel::Info, _loader_data, module_name, _stream);
5363 }
5364 // No 'else' here as logging levels are not mutually exclusive
5365 if (log_is_enabled(Debug, class, load)) {
5366 ik->print_loading_log(LogLevel::Debug, _loader_data, module_name, _stream);
5367 }
5368 }
5369
5370 if (log_is_enabled(Debug, class, resolve)) {
5371 ResourceMark rm;
5372 // print out the superclass.
5373 const char * from = ik->external_name();
5374 if (ik->java_super() != NULL) {
5375 log_debug(class, resolve)("%s %s (super)",
5376 from,
5377 ik->java_super()->external_name());
5378 }
5379 // print out each of the interface classes referred to by this class.
5380 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5381 if (local_interfaces != NULL) {
5382 const int length = local_interfaces->length();
5383 for (int i = 0; i < length; i++) {
5384 const Klass* const k = local_interfaces->at(i);
5385 const char * to = k->external_name();
5386 log_debug(class, resolve)("%s %s (interface)", from, to);
5387 }
5388 }
5389 }
5390 }
5391
5392 TRACE_INIT_KLASS_ID(ik);
5393
5394 // If we reach here, all is well.
5395 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5396 // in order for it to not be destroyed in the ClassFileParser destructor.
5397 set_klass_to_deallocate(NULL);
5398
5399 // it's official
5400 set_klass(ik);
5401
5402 debug_only(ik->verify();)
5403 }
5404
5405 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5406 Symbol* name,
5407 ClassLoaderData* loader_data,
5408 Handle protection_domain,
5409 const Klass* host_klass,
5410 GrowableArray<Handle>* cp_patches,
5411 Publicity pub_level,
5412 TRAPS) :
5413 _stream(stream),
5414 _requested_name(name),
5415 _loader_data(loader_data),
5416 _host_klass(host_klass),
5417 _cp_patches(cp_patches),
5418 _super_klass(),
5419 _cp(NULL),
5420 _fields(NULL),
5421 _methods(NULL),
5422 _inner_classes(NULL),
5423 _local_interfaces(NULL),
5424 _transitive_interfaces(NULL),
5425 _combined_annotations(NULL),
5426 _annotations(NULL),
5427 _type_annotations(NULL),
5428 _fields_annotations(NULL),
5429 _fields_type_annotations(NULL),
5430 _klass(NULL),
5431 _klass_to_deallocate(NULL),
5432 _parsed_annotations(NULL),
5433 _fac(NULL),
5434 _field_info(NULL),
5435 _method_ordering(NULL),
5436 _all_mirandas(NULL),
5437 _vtable_size(0),
5438 _itable_size(0),
5439 _num_miranda_methods(0),
5440 _rt(REF_NONE),
5441 _protection_domain(protection_domain),
5442 _access_flags(),
5443 _pub_level(pub_level),
5444 _synthetic_flag(false),
5445 _sde_length(false),
5446 _sde_buffer(NULL),
5447 _sourcefile_index(0),
5448 _generic_signature_index(0),
5449 _major_version(0),
5450 _minor_version(0),
5451 _this_class_index(0),
5452 _super_class_index(0),
5453 _itfs_len(0),
5454 _java_fields_count(0),
5455 _need_verify(false),
5456 _relax_verify(false),
5457 _has_default_methods(false),
5458 _declares_default_methods(false),
5459 _has_final_method(false),
5460 _has_finalizer(false),
5461 _has_empty_finalizer(false),
5462 _has_vanilla_constructor(false),
5463 _max_bootstrap_specifier_index(-1) {
5464
5465 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5466
5467 assert(THREAD->is_Java_thread(), "invariant");
5468 assert(_loader_data != NULL, "invariant");
5469 assert(stream != NULL, "invariant");
5470 assert(_stream != NULL, "invariant");
5471 assert(_stream->buffer() == _stream->current(), "invariant");
5472 assert(_class_name != NULL, "invariant");
5473 assert(0 == _access_flags.as_int(), "invariant");
5474
5475 // Figure out whether we can skip format checking (matching classic VM behavior)
5476 if (DumpSharedSpaces) {
5477 // verify == true means it's a 'remote' class (i.e., non-boot class)
5478 // Verification decision is based on BytecodeVerificationRemote flag
5479 // for those classes.
5480 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5481 BytecodeVerificationLocal;
5482 }
5483 else {
5484 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5485 stream->need_verify());
5486 }
5487
5488 // synch back verification state to stream
5489 stream->set_verify(_need_verify);
5490
5491 // Check if verification needs to be relaxed for this class file
5492 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5493 _relax_verify = Verifier::relax_verify_for(_loader_data->class_loader());
5494
5495 parse_stream(stream, CHECK);
5496
5497 post_process_parsed_stream(stream, _cp, CHECK);
5498 }
5499
5500 void ClassFileParser::clear_class_metadata() {
5501 // metadata created before the instance klass is created. Must be
5502 // deallocated if classfile parsing returns an error.
5503 _cp = NULL;
5504 _fields = NULL;
5505 _methods = NULL;
5506 _inner_classes = NULL;
5507 _local_interfaces = NULL;
5508 _transitive_interfaces = NULL;
5509 _combined_annotations = NULL;
5510 _annotations = _type_annotations = NULL;
5511 _fields_annotations = _fields_type_annotations = NULL;
5512 }
5513
5514 // Destructor to clean up
5515 ClassFileParser::~ClassFileParser() {
5516 if (_cp != NULL) {
5517 MetadataFactory::free_metadata(_loader_data, _cp);
5518 }
5519 if (_fields != NULL) {
5520 MetadataFactory::free_array<u2>(_loader_data, _fields);
5521 }
5522
5523 if (_methods != NULL) {
5524 // Free methods
5525 InstanceKlass::deallocate_methods(_loader_data, _methods);
5526 }
5527
5528 // beware of the Universe::empty_blah_array!!
5529 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5530 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5531 }
5532
5533 // Free interfaces
5534 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5535 _local_interfaces, _transitive_interfaces);
5536
5537 if (_combined_annotations != NULL) {
5538 // After all annotations arrays have been created, they are installed into the
5539 // Annotations object that will be assigned to the InstanceKlass being created.
5540
5541 // Deallocate the Annotations object and the installed annotations arrays.
5542 _combined_annotations->deallocate_contents(_loader_data);
5543
5544 // If the _combined_annotations pointer is non-NULL,
5545 // then the other annotations fields should have been cleared.
5546 assert(_annotations == NULL, "Should have been cleared");
5547 assert(_type_annotations == NULL, "Should have been cleared");
5548 assert(_fields_annotations == NULL, "Should have been cleared");
5549 assert(_fields_type_annotations == NULL, "Should have been cleared");
5550 } else {
5551 // If the annotations arrays were not installed into the Annotations object,
5552 // then they have to be deallocated explicitly.
5553 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5554 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5555 Annotations::free_contents(_loader_data, _fields_annotations);
5556 Annotations::free_contents(_loader_data, _fields_type_annotations);
5557 }
5558
5559 clear_class_metadata();
5560
5561 // deallocate the klass if already created. Don't directly deallocate, but add
5562 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5563 // at a safepoint.
5564 if (_klass_to_deallocate != NULL) {
5565 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5566 }
5567 }
5568
5569 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5570 TRAPS) {
5571
5572 assert(stream != NULL, "invariant");
5573 assert(_class_name != NULL, "invariant");
5574
5575 // BEGIN STREAM PARSING
5576 stream->guarantee_more(8, CHECK); // magic, major, minor
5577 // Magic value
5578 const u4 magic = stream->get_u4_fast();
5579 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5580 "Incompatible magic value %u in class file %s",
5581 magic, CHECK);
5582
5583 // Version numbers
5584 _minor_version = stream->get_u2_fast();
5585 _major_version = stream->get_u2_fast();
5586
5587 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5588 ResourceMark rm;
5589 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5590 _major_version, _minor_version, _class_name->as_C_string());
5591 Exceptions::fthrow(
5592 THREAD_AND_LOCATION,
5593 vmSymbols::java_lang_UnsupportedClassVersionError(),
5594 "Unsupported major.minor version for dump time %u.%u",
5595 _major_version,
5596 _minor_version);
5597 }
5598
5599 // Check version numbers - we check this even with verifier off
5600 if (!is_supported_version(_major_version, _minor_version)) {
5601 ResourceMark rm(THREAD);
5602 Exceptions::fthrow(
5603 THREAD_AND_LOCATION,
5604 vmSymbols::java_lang_UnsupportedClassVersionError(),
5605 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5606 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
5607 _class_name->as_C_string(),
5608 _major_version,
5609 _minor_version,
5610 JAVA_MAX_SUPPORTED_VERSION,
5611 JAVA_MAX_SUPPORTED_MINOR_VERSION);
5612 return;
5613 }
5614
5615 stream->guarantee_more(3, CHECK); // length, first cp tag
5616 const u2 cp_size = stream->get_u2_fast();
5617
5618 guarantee_property(
5619 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5620 cp_size, CHECK);
5621
5622 _cp = ConstantPool::allocate(_loader_data,
5623 cp_size,
5624 CHECK);
5625
5626 ConstantPool* const cp = _cp;
5627
5628 parse_constant_pool(stream, cp, cp_size, CHECK);
5629
5630 assert(cp_size == (const u2)cp->length(), "invariant");
5631
5632 // ACCESS FLAGS
5633 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5634
5635 // Access flags
5636 jint flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5637
5638 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5639 // Set abstract bit for old class files for backward compatibility
5640 flags |= JVM_ACC_ABSTRACT;
5641 }
5642
5643 _access_flags.set_flags(flags);
5644
5645 verify_legal_class_modifiers((jint)_access_flags.as_int(), CHECK);
5646
5647 // This class and superclass
5648 _this_class_index = stream->get_u2_fast();
5649 check_property(
5650 valid_cp_range(_this_class_index, cp_size) &&
5651 cp->tag_at(_this_class_index).is_unresolved_klass(),
5652 "Invalid this class index %u in constant pool in class file %s",
5653 _this_class_index, CHECK);
5654
5655 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5656 assert(class_name_in_cp != NULL, "class_name can't be null");
5657
5658 // Update _class_name which could be null previously
5659 // to reflect the name in the constant pool
5660 _class_name = class_name_in_cp;
5661
5662 // Don't need to check whether this class name is legal or not.
5663 // It has been checked when constant pool is parsed.
5664 // However, make sure it is not an array type.
5665 if (_need_verify) {
5666 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
5667 "Bad class name in class file %s",
5668 CHECK);
5669 }
5670
5671 // Checks if name in class file matches requested name
5672 if (_requested_name != NULL && _requested_name != _class_name) {
5673 ResourceMark rm(THREAD);
5674 Exceptions::fthrow(
5675 THREAD_AND_LOCATION,
5676 vmSymbols::java_lang_NoClassDefFoundError(),
5677 "%s (wrong name: %s)",
5678 _class_name->as_C_string(),
5679 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
5680 );
5681 return;
5682 }
5683
5684 // Verification prevents us from creating names with dots in them, this
5685 // asserts that that's the case.
5686 assert(is_internal_format(_class_name), "external class name format used internally");
5687
5688 if (!is_internal()) {
5689 if (log_is_enabled(Debug, class, preorder)){
5690 ResourceMark rm(THREAD);
5691 outputStream* log = Log(class, preorder)::debug_stream();
5692 log->print("%s", _class_name->as_klass_external_name());
5693 if (stream->source() != NULL) {
5694 log->print(" source: %s", stream->source());
5695 }
5696 log->cr();
5697 }
5698
5699 #if INCLUDE_CDS
5700 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5701 // Only dump the classes that can be stored into CDS archive.
5702 // Anonymous classes such as generated LambdaForm classes are also not included.
5703 if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
5704 _host_klass == NULL) {
5705 ResourceMark rm(THREAD);
5706 classlist_file->print_cr("%s", _class_name->as_C_string());
5707 classlist_file->flush();
5708 }
5709 }
5710 #endif
5711 }
5712
5713 // SUPERKLASS
5714 _super_class_index = stream->get_u2_fast();
5715 _super_klass = parse_super_class(cp,
5716 _super_class_index,
5717 _need_verify,
5718 CHECK);
5719
5720 // Interfaces
5721 _itfs_len = stream->get_u2_fast();
5722 parse_interfaces(stream,
5723 _itfs_len,
5724 cp,
5725 &_has_default_methods,
5726 CHECK);
5727
5728 assert(_local_interfaces != NULL, "invariant");
5729
5730 // Fields (offsets are filled in later)
5731 _fac = new FieldAllocationCount();
5732 parse_fields(stream,
5733 _access_flags.is_interface(),
5734 _fac,
5735 cp,
5736 cp_size,
5737 &_java_fields_count,
5738 CHECK);
5739
5740 assert(_fields != NULL, "invariant");
5741
5742 // Methods
5743 AccessFlags promoted_flags;
5744 parse_methods(stream,
5745 _access_flags.is_interface(),
5746 &promoted_flags,
5747 &_has_final_method,
5748 &_declares_default_methods,
5749 CHECK);
5750
5751 assert(_methods != NULL, "invariant");
5752
5753 // promote flags from parse_methods() to the klass' flags
5754 _access_flags.add_promoted_flags(promoted_flags.as_int());
5755
5756 if (_declares_default_methods) {
5757 _has_default_methods = true;
5758 }
5759
5760 // Additional attributes/annotations
5761 _parsed_annotations = new ClassAnnotationCollector();
5762 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5763
5764 assert(_inner_classes != NULL, "invariant");
5765
5766 // Finalize the Annotations metadata object,
5767 // now that all annotation arrays have been created.
5768 create_combined_annotations(CHECK);
5769
5770 // Make sure this is the end of class file stream
5771 guarantee_property(stream->at_eos(),
5772 "Extra bytes at the end of class file %s",
5773 CHECK);
5774
5775 // all bytes in stream read and parsed
5776 }
5777
5778 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5779 ConstantPool* cp,
5780 TRAPS) {
5781 assert(stream != NULL, "invariant");
5782 assert(stream->at_eos(), "invariant");
5783 assert(cp != NULL, "invariant");
5784 assert(_loader_data != NULL, "invariant");
5785
5786 // We check super class after class file is parsed and format is checked
5787 if (_super_class_index > 0 && NULL ==_super_klass) {
5788 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5789 if (_access_flags.is_interface()) {
5790 // Before attempting to resolve the superclass, check for class format
5791 // errors not checked yet.
5792 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5793 "Interfaces must have java.lang.Object as superclass in class file %s",
5794 CHECK);
5795 }
5796 _super_klass = (const InstanceKlass*)
5797 SystemDictionary::resolve_super_or_fail(_class_name,
5798 super_class_name,
5799 _loader_data->class_loader(),
5800 _protection_domain,
5801 true,
5802 CHECK);
5803 }
5804
5805 if (_super_klass != NULL) {
5806 if (_super_klass->has_default_methods()) {
5807 _has_default_methods = true;
5808 }
5809
5810 if (_super_klass->is_interface()) {
5811 ResourceMark rm(THREAD);
5812 Exceptions::fthrow(
5813 THREAD_AND_LOCATION,
5814 vmSymbols::java_lang_IncompatibleClassChangeError(),
5815 "class %s has interface %s as super class",
5816 _class_name->as_klass_external_name(),
5817 _super_klass->external_name()
5818 );
5819 return;
5820 }
5821 // Make sure super class is not final
5822 if (_super_klass->is_final()) {
5823 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
5824 }
5825 }
5826
5827 // Compute the transitive list of all unique interfaces implemented by this class
5828 _transitive_interfaces =
5829 compute_transitive_interfaces(_super_klass,
5830 _local_interfaces,
5831 _loader_data,
5832 CHECK);
5833
5834 assert(_transitive_interfaces != NULL, "invariant");
5835
5836 // sort methods
5837 _method_ordering = sort_methods(_methods);
5838
5839 _all_mirandas = new GrowableArray<Method*>(20);
5840
5841 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5842 &_num_miranda_methods,
5843 _all_mirandas,
5844 _super_klass,
5845 _methods,
5846 _access_flags,
5847 _loader_data->class_loader(),
5848 _class_name,
5849 _local_interfaces,
5850 CHECK);
5851
5852 // Size of Java itable (in words)
5853 _itable_size = _access_flags.is_interface() ? 0 :
5854 klassItable::compute_itable_size(_transitive_interfaces);
5855
5856 assert(_fac != NULL, "invariant");
5857 assert(_parsed_annotations != NULL, "invariant");
5858
5859 _field_info = new FieldLayoutInfo();
5860 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
5861
5862 // Compute reference typ
5863 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
5864
5865 }
5866
5867 void ClassFileParser::set_klass(InstanceKlass* klass) {
5868
5869 #ifdef ASSERT
5870 if (klass != NULL) {
5871 assert(NULL == _klass, "leaking?");
5872 }
5873 #endif
5874
5875 _klass = klass;
5876 }
5877
5878 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
5879
5880 #ifdef ASSERT
5881 if (klass != NULL) {
5882 assert(NULL == _klass_to_deallocate, "leaking?");
5883 }
5884 #endif
5885
5886 _klass_to_deallocate = klass;
5887 }
5888
5889 // Caller responsible for ResourceMark
5890 // clone stream with rewound position
5891 const ClassFileStream* ClassFileParser::clone_stream() const {
5892 assert(_stream != NULL, "invariant");
5893
5894 return _stream->clone();
5895 }
5896 // ----------------------------------------------------------------------------
5897 // debugging
5898
5899 #ifdef ASSERT
5900
5901 // return true if class_name contains no '.' (internal format is '/')
5902 bool ClassFileParser::is_internal_format(Symbol* class_name) {
5903 if (class_name != NULL) {
5904 ResourceMark rm;
5905 char* name = class_name->as_C_string();
5906 return strchr(name, '.') == NULL;
5907 } else {
5908 return true;
5909 }
5910 }
5911
5912 #endif