1 /*
2 * Copyright (c) 1997, 2015, 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/symbolTable.hpp"
32 #include "classfile/systemDictionary.hpp"
33 #include "classfile/verificationType.hpp"
34 #include "classfile/verifier.hpp"
35 #include "classfile/vmSymbols.hpp"
36 #include "gc/shared/gcLocker.hpp"
37 #include "logging/log.hpp"
38 #include "memory/allocation.hpp"
39 #include "memory/metadataFactory.hpp"
40 #include "memory/oopFactory.hpp"
41 #include "memory/resourceArea.hpp"
42 #include "memory/universe.inline.hpp"
43 #include "oops/annotations.hpp"
44 #include "oops/fieldStreams.hpp"
45 #include "oops/instanceKlass.hpp"
46 #include "oops/instanceMirrorKlass.hpp"
47 #include "oops/klass.inline.hpp"
48 #include "oops/klassVtable.hpp"
49 #include "oops/metadata.hpp"
50 #include "oops/method.hpp"
51 #include "oops/oop.inline.hpp"
52 #include "oops/symbol.hpp"
53 #include "prims/jvm.h"
54 #include "prims/jvmtiExport.hpp"
55 #include "prims/jvmtiThreadState.hpp"
56 #include "runtime/javaCalls.hpp"
57 #include "runtime/perfData.hpp"
58 #include "runtime/reflection.hpp"
59 #include "runtime/signature.hpp"
60 #include "runtime/timer.hpp"
61 #include "services/classLoadingService.hpp"
62 #include "services/threadService.hpp"
63 #include "trace/traceMacros.hpp"
64 #include "utilities/array.hpp"
65 #include "utilities/exceptions.hpp"
66 #include "utilities/globalDefinitions.hpp"
67 #include "utilities/macros.hpp"
68 #include "utilities/ostream.hpp"
69 #include "utilities/resourceHash.hpp"
70 #if INCLUDE_CDS
71 #include "classfile/systemDictionaryShared.hpp"
72 #endif
73
74 // We generally try to create the oops directly when parsing, rather than
75 // allocating temporary data structures and copying the bytes twice. A
76 // temporary area is only needed when parsing utf8 entries in the constant
77 // pool and when parsing line number tables.
78
79 // We add assert in debug mode when class format is not checked.
80
81 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
82 #define JAVA_MIN_SUPPORTED_VERSION 45
83 #define JAVA_MAX_SUPPORTED_VERSION 52
84 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
85
86 // Used for two backward compatibility reasons:
87 // - to check for new additions to the class file format in JDK1.5
88 // - to check for bug fixes in the format checker in JDK1.5
89 #define JAVA_1_5_VERSION 49
90
91 // Used for backward compatibility reasons:
92 // - to check for javac bug fixes that happened after 1.5
93 // - also used as the max version when running in jdk6
94 #define JAVA_6_VERSION 50
95
96 // Used for backward compatibility reasons:
97 // - to check NameAndType_info signatures more aggressively
98 // - to disallow argument and require ACC_STATIC for <clinit> methods
99 #define JAVA_7_VERSION 51
100
101 // Extension method support.
102 #define JAVA_8_VERSION 52
103
104 enum { LegalClass, LegalField, LegalMethod }; // used to verify unqualified names
105
106 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
107 ConstantPool* cp,
108 const int length,
109 TRAPS) {
110 assert(stream != NULL, "invariant");
111 assert(cp != NULL, "invariant");
112
113 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
114 // this function (_current can be allocated in a register, with scalar
115 // replacement of aggregates). The _current pointer is copied back to
116 // stream() when this function returns. DON'T call another method within
117 // this method that uses stream().
118 const ClassFileStream cfs1 = *stream;
119 const ClassFileStream* const cfs = &cfs1;
120
121 assert(cfs->allocated_on_stack(), "should be local");
122 debug_only(const u1* const old_current = stream->current();)
123
124 // Used for batching symbol allocations.
125 const char* names[SymbolTable::symbol_alloc_batch_size];
126 int lengths[SymbolTable::symbol_alloc_batch_size];
127 int indices[SymbolTable::symbol_alloc_batch_size];
128 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
129 int names_count = 0;
130
131 // parsing Index 0 is unused
132 for (int index = 1; index < length; index++) {
133 // Each of the following case guarantees one more byte in the stream
134 // for the following tag or the access_flags following constant pool,
135 // so we don't need bounds-check for reading tag.
136 const u1 tag = cfs->get_u1_fast();
137 switch (tag) {
138 case JVM_CONSTANT_Class : {
139 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
140 const u2 name_index = cfs->get_u2_fast();
141 cp->klass_index_at_put(index, name_index);
142 break;
143 }
144 case JVM_CONSTANT_Fieldref: {
145 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
146 const u2 class_index = cfs->get_u2_fast();
147 const u2 name_and_type_index = cfs->get_u2_fast();
148 cp->field_at_put(index, class_index, name_and_type_index);
149 break;
150 }
151 case JVM_CONSTANT_Methodref: {
152 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
153 const u2 class_index = cfs->get_u2_fast();
154 const u2 name_and_type_index = cfs->get_u2_fast();
155 cp->method_at_put(index, class_index, name_and_type_index);
156 break;
157 }
158 case JVM_CONSTANT_InterfaceMethodref: {
159 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
160 const u2 class_index = cfs->get_u2_fast();
161 const u2 name_and_type_index = cfs->get_u2_fast();
162 cp->interface_method_at_put(index, class_index, name_and_type_index);
163 break;
164 }
165 case JVM_CONSTANT_String : {
166 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
167 const u2 string_index = cfs->get_u2_fast();
168 cp->string_index_at_put(index, string_index);
169 break;
170 }
171 case JVM_CONSTANT_MethodHandle :
172 case JVM_CONSTANT_MethodType: {
173 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
174 classfile_parse_error(
175 "Class file version does not support constant tag %u in class file %s",
176 tag, CHECK);
177 }
178 if (tag == JVM_CONSTANT_MethodHandle) {
179 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
180 const u1 ref_kind = cfs->get_u1_fast();
181 const u2 method_index = cfs->get_u2_fast();
182 cp->method_handle_index_at_put(index, ref_kind, method_index);
183 }
184 else if (tag == JVM_CONSTANT_MethodType) {
185 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
186 const u2 signature_index = cfs->get_u2_fast();
187 cp->method_type_index_at_put(index, signature_index);
188 }
189 else {
190 ShouldNotReachHere();
191 }
192 break;
193 }
194 case JVM_CONSTANT_InvokeDynamic : {
195 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
196 classfile_parse_error(
197 "Class file version does not support constant tag %u in class file %s",
198 tag, CHECK);
199 }
200 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
201 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
202 const u2 name_and_type_index = cfs->get_u2_fast();
203 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
204 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
205 }
206 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
207 break;
208 }
209 case JVM_CONSTANT_Integer: {
210 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
211 const u4 bytes = cfs->get_u4_fast();
212 cp->int_at_put(index, (jint)bytes);
213 break;
214 }
215 case JVM_CONSTANT_Float: {
216 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
217 const u4 bytes = cfs->get_u4_fast();
218 cp->float_at_put(index, *(jfloat*)&bytes);
219 break;
220 }
221 case JVM_CONSTANT_Long: {
222 // A mangled type might cause you to overrun allocated memory
223 guarantee_property(index + 1 < length,
224 "Invalid constant pool entry %u in class file %s",
225 index,
226 CHECK);
227 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
228 const u8 bytes = cfs->get_u8_fast();
229 cp->long_at_put(index, bytes);
230 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
231 break;
232 }
233 case JVM_CONSTANT_Double: {
234 // A mangled type might cause you to overrun allocated memory
235 guarantee_property(index+1 < length,
236 "Invalid constant pool entry %u in class file %s",
237 index,
238 CHECK);
239 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
240 const u8 bytes = cfs->get_u8_fast();
241 cp->double_at_put(index, *(jdouble*)&bytes);
242 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
243 break;
244 }
245 case JVM_CONSTANT_NameAndType: {
246 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
247 const u2 name_index = cfs->get_u2_fast();
248 const u2 signature_index = cfs->get_u2_fast();
249 cp->name_and_type_at_put(index, name_index, signature_index);
250 break;
251 }
252 case JVM_CONSTANT_Utf8 : {
253 cfs->guarantee_more(2, CHECK); // utf8_length
254 u2 utf8_length = cfs->get_u2_fast();
255 const u1* utf8_buffer = cfs->get_u1_buffer();
256 assert(utf8_buffer != NULL, "null utf8 buffer");
257 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
258 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
259 cfs->skip_u1_fast(utf8_length);
260
261 // Before storing the symbol, make sure it's legal
262 if (_need_verify) {
263 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
264 }
265
266 if (has_cp_patch_at(index)) {
267 Handle patch = clear_cp_patch_at(index);
268 guarantee_property(java_lang_String::is_instance(patch()),
269 "Illegal utf8 patch at %d in class file %s",
270 index,
271 CHECK);
272 const char* const str = java_lang_String::as_utf8_string(patch());
273 // (could use java_lang_String::as_symbol instead, but might as well batch them)
274 utf8_buffer = (const u1*) str;
275 utf8_length = (int) strlen(str);
276 }
277
278 unsigned int hash;
279 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
280 utf8_length,
281 hash);
282 if (result == NULL) {
283 names[names_count] = (const char*)utf8_buffer;
284 lengths[names_count] = utf8_length;
285 indices[names_count] = index;
286 hashValues[names_count++] = hash;
287 if (names_count == SymbolTable::symbol_alloc_batch_size) {
288 SymbolTable::new_symbols(_loader_data,
289 cp,
290 names_count,
291 names,
292 lengths,
293 indices,
294 hashValues,
295 CHECK);
296 names_count = 0;
297 }
298 } else {
299 cp->symbol_at_put(index, result);
300 }
301 break;
302 }
303 default: {
304 classfile_parse_error("Unknown constant tag %u in class file %s",
305 tag,
306 CHECK);
307 break;
308 }
309 } // end of switch(tag)
310 } // end of for
311
312 // Allocate the remaining symbols
313 if (names_count > 0) {
314 SymbolTable::new_symbols(_loader_data,
315 cp,
316 names_count,
317 names,
318 lengths,
319 indices,
320 hashValues,
321 CHECK);
322 }
323
324 // Copy _current pointer of local copy back to stream.
325 assert(stream->current() == old_current, "non-exclusive use of stream");
326 stream->set_current(cfs1.current());
327
328 }
329
330 static inline bool valid_cp_range(int index, int length) {
331 return (index > 0 && index < length);
332 }
333
334 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
335 assert(cp != NULL, "invariant");
336 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
337 return cp->symbol_at(index);
338 }
339 return NULL;
340 }
341
342 #ifdef ASSERT
343 PRAGMA_DIAG_PUSH
344 PRAGMA_FORMAT_NONLITERAL_IGNORED
345 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
346 ResourceMark rm(THREAD);
347 fatal(msg, _class_name->as_C_string());
348 }
349
350 void ClassFileParser::report_assert_property_failure(const char* msg,
351 int index,
352 TRAPS) const {
353 ResourceMark rm(THREAD);
354 fatal(msg, index, _class_name->as_C_string());
355 }
356 PRAGMA_DIAG_POP
357 #endif
358
359 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
360 ConstantPool* const cp,
361 const int length,
362 TRAPS) {
363 assert(cp != NULL, "invariant");
364 assert(stream != NULL, "invariant");
365
366 // parsing constant pool entries
367 parse_constant_pool_entries(stream, cp, length, CHECK);
368
369 int index = 1; // declared outside of loops for portability
370
371 // first verification pass - validate cross references
372 // and fixup class and string constants
373 for (index = 1; index < length; index++) { // Index 0 is unused
374 const jbyte tag = cp->tag_at(index).value();
375 switch (tag) {
376 case JVM_CONSTANT_Class: {
377 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
378 break;
379 }
380 case JVM_CONSTANT_Fieldref:
381 // fall through
382 case JVM_CONSTANT_Methodref:
383 // fall through
384 case JVM_CONSTANT_InterfaceMethodref: {
385 if (!_need_verify) break;
386 const int klass_ref_index = cp->klass_ref_index_at(index);
387 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
388 check_property(valid_klass_reference_at(klass_ref_index),
389 "Invalid constant pool index %u in class file %s",
390 klass_ref_index, CHECK);
391 check_property(valid_cp_range(name_and_type_ref_index, length) &&
392 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
393 "Invalid constant pool index %u in class file %s",
394 name_and_type_ref_index, CHECK);
395 break;
396 }
397 case JVM_CONSTANT_String: {
398 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
399 break;
400 }
401 case JVM_CONSTANT_Integer:
402 break;
403 case JVM_CONSTANT_Float:
404 break;
405 case JVM_CONSTANT_Long:
406 case JVM_CONSTANT_Double: {
407 index++;
408 check_property(
409 (index < length && cp->tag_at(index).is_invalid()),
410 "Improper constant pool long/double index %u in class file %s",
411 index, CHECK);
412 break;
413 }
414 case JVM_CONSTANT_NameAndType: {
415 if (!_need_verify) break;
416 const int name_ref_index = cp->name_ref_index_at(index);
417 const int signature_ref_index = cp->signature_ref_index_at(index);
418 check_property(valid_symbol_at(name_ref_index),
419 "Invalid constant pool index %u in class file %s",
420 name_ref_index, CHECK);
421 check_property(valid_symbol_at(signature_ref_index),
422 "Invalid constant pool index %u in class file %s",
423 signature_ref_index, CHECK);
424 break;
425 }
426 case JVM_CONSTANT_Utf8:
427 break;
428 case JVM_CONSTANT_UnresolvedClass: // fall-through
429 case JVM_CONSTANT_UnresolvedClassInError: {
430 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
431 break;
432 }
433 case JVM_CONSTANT_ClassIndex: {
434 const int class_index = cp->klass_index_at(index);
435 check_property(valid_symbol_at(class_index),
436 "Invalid constant pool index %u in class file %s",
437 class_index, CHECK);
438 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
439 break;
440 }
441 case JVM_CONSTANT_StringIndex: {
442 const int string_index = cp->string_index_at(index);
443 check_property(valid_symbol_at(string_index),
444 "Invalid constant pool index %u in class file %s",
445 string_index, CHECK);
446 Symbol* const sym = cp->symbol_at(string_index);
447 cp->unresolved_string_at_put(index, sym);
448 break;
449 }
450 case JVM_CONSTANT_MethodHandle: {
451 const int ref_index = cp->method_handle_index_at(index);
452 check_property(valid_cp_range(ref_index, length),
453 "Invalid constant pool index %u in class file %s",
454 ref_index, CHECK);
455 const constantTag tag = cp->tag_at(ref_index);
456 const int ref_kind = cp->method_handle_ref_kind_at(index);
457
458 switch (ref_kind) {
459 case JVM_REF_getField:
460 case JVM_REF_getStatic:
461 case JVM_REF_putField:
462 case JVM_REF_putStatic: {
463 check_property(
464 tag.is_field(),
465 "Invalid constant pool index %u in class file %s (not a field)",
466 ref_index, CHECK);
467 break;
468 }
469 case JVM_REF_invokeVirtual:
470 case JVM_REF_newInvokeSpecial: {
471 check_property(
472 tag.is_method(),
473 "Invalid constant pool index %u in class file %s (not a method)",
474 ref_index, CHECK);
475 break;
476 }
477 case JVM_REF_invokeStatic:
478 case JVM_REF_invokeSpecial: {
479 check_property(
480 tag.is_method() ||
481 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
482 "Invalid constant pool index %u in class file %s (not a method)",
483 ref_index, CHECK);
484 break;
485 }
486 case JVM_REF_invokeInterface: {
487 check_property(
488 tag.is_interface_method(),
489 "Invalid constant pool index %u in class file %s (not an interface method)",
490 ref_index, CHECK);
491 break;
492 }
493 default: {
494 classfile_parse_error(
495 "Bad method handle kind at constant pool index %u in class file %s",
496 index, CHECK);
497 }
498 } // switch(refkind)
499 // Keep the ref_index unchanged. It will be indirected at link-time.
500 break;
501 } // case MethodHandle
502 case JVM_CONSTANT_MethodType: {
503 const int ref_index = cp->method_type_index_at(index);
504 check_property(valid_symbol_at(ref_index),
505 "Invalid constant pool index %u in class file %s",
506 ref_index, CHECK);
507 break;
508 }
509 case JVM_CONSTANT_InvokeDynamic: {
510 const int name_and_type_ref_index =
511 cp->invoke_dynamic_name_and_type_ref_index_at(index);
512
513 check_property(valid_cp_range(name_and_type_ref_index, length) &&
514 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
515 "Invalid constant pool index %u in class file %s",
516 name_and_type_ref_index, CHECK);
517 // bootstrap specifier index must be checked later,
518 // when BootstrapMethods attr is available
519 break;
520 }
521 default: {
522 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
523 ShouldNotReachHere();
524 break;
525 }
526 } // switch(tag)
527 } // end of for
528
529 if (_cp_patches != NULL) {
530 // need to treat this_class specially...
531 int this_class_index;
532 {
533 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
534 const u1* const mark = stream->current();
535 stream->skip_u2_fast(1); // skip flags
536 this_class_index = stream->get_u2_fast();
537 stream->set_current(mark); // revert to mark
538 }
539
540 for (index = 1; index < length; index++) { // Index 0 is unused
541 if (has_cp_patch_at(index)) {
542 guarantee_property(index != this_class_index,
543 "Illegal constant pool patch to self at %d in class file %s",
544 index, CHECK);
545 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
546 }
547 }
548 }
549
550 if (!_need_verify) {
551 return;
552 }
553
554 // second verification pass - checks the strings are of the right format.
555 // but not yet to the other entries
556 for (index = 1; index < length; index++) {
557 const jbyte tag = cp->tag_at(index).value();
558 switch (tag) {
559 case JVM_CONSTANT_UnresolvedClass: {
560 const Symbol* const class_name = cp->klass_name_at(index);
561 // check the name, even if _cp_patches will overwrite it
562 verify_legal_class_name(class_name, CHECK);
563 break;
564 }
565 case JVM_CONSTANT_NameAndType: {
566 if (_need_verify && _major_version >= JAVA_7_VERSION) {
567 const int sig_index = cp->signature_ref_index_at(index);
568 const int name_index = cp->name_ref_index_at(index);
569 const Symbol* const name = cp->symbol_at(name_index);
570 const Symbol* const sig = cp->symbol_at(sig_index);
571 guarantee_property(sig->utf8_length() != 0,
572 "Illegal zero length constant pool entry at %d in class %s",
573 sig_index, CHECK);
574 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
575 verify_legal_method_signature(name, sig, CHECK);
576 } else {
577 verify_legal_field_signature(name, sig, CHECK);
578 }
579 }
580 break;
581 }
582 case JVM_CONSTANT_InvokeDynamic:
583 case JVM_CONSTANT_Fieldref:
584 case JVM_CONSTANT_Methodref:
585 case JVM_CONSTANT_InterfaceMethodref: {
586 const int name_and_type_ref_index =
587 cp->name_and_type_ref_index_at(index);
588 // already verified to be utf8
589 const int name_ref_index =
590 cp->name_ref_index_at(name_and_type_ref_index);
591 // already verified to be utf8
592 const int signature_ref_index =
593 cp->signature_ref_index_at(name_and_type_ref_index);
594 const Symbol* const name = cp->symbol_at(name_ref_index);
595 const Symbol* const signature = cp->symbol_at(signature_ref_index);
596 if (tag == JVM_CONSTANT_Fieldref) {
597 verify_legal_field_name(name, CHECK);
598 if (_need_verify && _major_version >= JAVA_7_VERSION) {
599 // Signature is verified above, when iterating NameAndType_info.
600 // Need only to be sure it's non-zero length and the right type.
601 if (signature->utf8_length() == 0 ||
602 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
603 throwIllegalSignature(
604 "Field", name, signature, CHECK);
605 }
606 } else {
607 verify_legal_field_signature(name, signature, CHECK);
608 }
609 } else {
610 verify_legal_method_name(name, CHECK);
611 if (_need_verify && _major_version >= JAVA_7_VERSION) {
612 // Signature is verified above, when iterating NameAndType_info.
613 // Need only to be sure it's non-zero length and the right type.
614 if (signature->utf8_length() == 0 ||
615 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
616 throwIllegalSignature(
617 "Method", name, signature, CHECK);
618 }
619 } else {
620 verify_legal_method_signature(name, signature, CHECK);
621 }
622 if (tag == JVM_CONSTANT_Methodref) {
623 // 4509014: If a class method name begins with '<', it must be "<init>".
624 assert(name != NULL, "method name in constant pool is null");
625 const unsigned int name_len = name->utf8_length();
626 if (name_len != 0 && name->byte_at(0) == '<') {
627 if (name != vmSymbols::object_initializer_name()) {
628 classfile_parse_error(
629 "Bad method name at constant pool index %u in class file %s",
630 name_ref_index, CHECK);
631 }
632 }
633 }
634 }
635 break;
636 }
637 case JVM_CONSTANT_MethodHandle: {
638 const int ref_index = cp->method_handle_index_at(index);
639 const int ref_kind = cp->method_handle_ref_kind_at(index);
640 switch (ref_kind) {
641 case JVM_REF_invokeVirtual:
642 case JVM_REF_invokeStatic:
643 case JVM_REF_invokeSpecial:
644 case JVM_REF_newInvokeSpecial: {
645 const int name_and_type_ref_index =
646 cp->name_and_type_ref_index_at(ref_index);
647 const int name_ref_index =
648 cp->name_ref_index_at(name_and_type_ref_index);
649 const Symbol* const name = cp->symbol_at(name_ref_index);
650 if (ref_kind == JVM_REF_newInvokeSpecial) {
651 if (name != vmSymbols::object_initializer_name()) {
652 classfile_parse_error(
653 "Bad constructor name at constant pool index %u in class file %s",
654 name_ref_index, CHECK);
655 }
656 } else {
657 if (name == vmSymbols::object_initializer_name()) {
658 classfile_parse_error(
659 "Bad method name at constant pool index %u in class file %s",
660 name_ref_index, CHECK);
661 }
662 }
663 break;
664 }
665 // Other ref_kinds are already fully checked in previous pass.
666 } // switch(ref_kind)
667 break;
668 }
669 case JVM_CONSTANT_MethodType: {
670 const Symbol* const no_name = vmSymbols::type_name(); // place holder
671 const Symbol* const signature = cp->method_type_signature_at(index);
672 verify_legal_method_signature(no_name, signature, CHECK);
673 break;
674 }
675 case JVM_CONSTANT_Utf8: {
676 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
677 }
678 } // switch(tag)
679 } // end of for
680 }
681
682 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
683 int index,
684 Handle patch,
685 TRAPS) {
686 assert(cp != NULL, "invariant");
687
688 BasicType patch_type = T_VOID;
689
690 switch (cp->tag_at(index).value()) {
691
692 case JVM_CONSTANT_UnresolvedClass: {
693 // Patching a class means pre-resolving it.
694 // The name in the constant pool is ignored.
695 if (java_lang_Class::is_instance(patch())) {
696 guarantee_property(!java_lang_Class::is_primitive(patch()),
697 "Illegal class patch at %d in class file %s",
698 index, CHECK);
699 cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
700 } else {
701 guarantee_property(java_lang_String::is_instance(patch()),
702 "Illegal class patch at %d in class file %s",
703 index, CHECK);
704 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
705 cp->unresolved_klass_at_put(index, name);
706 }
707 break;
708 }
709
710 case JVM_CONSTANT_String: {
711 // skip this patch and don't clear it. Needs the oop array for resolved
712 // references to be created first.
713 return;
714 }
715 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
716 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
717 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
718 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
719 patch_prim:
720 {
721 jvalue value;
722 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
723 guarantee_property(value_type == patch_type,
724 "Illegal primitive patch at %d in class file %s",
725 index, CHECK);
726 switch (value_type) {
727 case T_INT: cp->int_at_put(index, value.i); break;
728 case T_FLOAT: cp->float_at_put(index, value.f); break;
729 case T_LONG: cp->long_at_put(index, value.j); break;
730 case T_DOUBLE: cp->double_at_put(index, value.d); break;
731 default: assert(false, "");
732 }
733 } // end patch_prim label
734 break;
735
736 default: {
737 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
738 guarantee_property(!has_cp_patch_at(index),
739 "Illegal unexpected patch at %d in class file %s",
740 index, CHECK);
741 return;
742 }
743 } // end of switch(tag)
744
745 // On fall-through, mark the patch as used.
746 clear_cp_patch_at(index);
747 }
748 class NameSigHash: public ResourceObj {
749 public:
750 const Symbol* _name; // name
751 const Symbol* _sig; // signature
752 NameSigHash* _next; // Next entry in hash table
753 };
754
755 static const int HASH_ROW_SIZE = 256;
756
757 static unsigned int hash(const Symbol* name, const Symbol* sig) {
758 unsigned int raw_hash = 0;
759 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
760 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
761
762 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
763 }
764
765
766 static void initialize_hashtable(NameSigHash** table) {
767 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
768 }
769 // Return false if the name/sig combination is found in table.
770 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
771 // The old format checker uses heap sort to find duplicates.
772 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
773 // of table since we don't expect Symbol*'s to move.
774 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
775 assert(name != NULL, "name in constant pool is NULL");
776
777 // First lookup for duplicates
778 int index = hash(name, sig);
779 NameSigHash* entry = table[index];
780 while (entry != NULL) {
781 if (entry->_name == name && entry->_sig == sig) {
782 return false;
783 }
784 entry = entry->_next;
785 }
786
787 // No duplicate is found, allocate a new entry and fill it.
788 entry = new NameSigHash();
789 entry->_name = name;
790 entry->_sig = sig;
791
792 // Insert into hash table
793 entry->_next = table[index];
794 table[index] = entry;
795
796 return true;
797 }
798
799 // Side-effects: populates the _local_interfaces field
800 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
801 const int itfs_len,
802 ConstantPool* const cp,
803 bool* const has_default_methods,
804 TRAPS) {
805 assert(stream != NULL, "invariant");
806 assert(cp != NULL, "invariant");
807 assert(has_default_methods != NULL, "invariant");
808
809 if (itfs_len == 0) {
810 _local_interfaces = Universe::the_empty_klass_array();
811 } else {
812 assert(itfs_len > 0, "only called for len>0");
813 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
814
815 int index;
816 for (index = 0; index < itfs_len; index++) {
817 const u2 interface_index = stream->get_u2(CHECK);
818 KlassHandle interf;
819 check_property(
820 valid_klass_reference_at(interface_index),
821 "Interface name has bad constant pool index %u in class file %s",
822 interface_index, CHECK);
823 if (cp->tag_at(interface_index).is_klass()) {
824 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
825 } else {
826 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
827
828 // Don't need to check legal name because it's checked when parsing constant pool.
829 // But need to make sure it's not an array type.
830 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
831 "Bad interface name in class file %s", CHECK);
832
833 // Call resolve_super so classcircularity is checked
834 const Klass* const k =
835 SystemDictionary::resolve_super_or_fail(_class_name,
836 unresolved_klass,
837 _loader_data->class_loader(),
838 _protection_domain,
839 false,
840 CHECK);
841 interf = KlassHandle(THREAD, k);
842 }
843
844 if (!interf()->is_interface()) {
845 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
846 "Implementing class");
847 }
848
849 if (InstanceKlass::cast(interf())->has_default_methods()) {
850 *has_default_methods = true;
851 }
852 _local_interfaces->at_put(index, interf());
853 }
854
855 if (!_need_verify || itfs_len <= 1) {
856 return;
857 }
858
859 // Check if there's any duplicates in interfaces
860 ResourceMark rm(THREAD);
861 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
862 NameSigHash*,
863 HASH_ROW_SIZE);
864 initialize_hashtable(interface_names);
865 bool dup = false;
866 {
867 debug_only(No_Safepoint_Verifier nsv;)
868 for (index = 0; index < itfs_len; index++) {
869 const Klass* const k = _local_interfaces->at(index);
870 const Symbol* const name = InstanceKlass::cast(k)->name();
871 // If no duplicates, add (name, NULL) in hashtable interface_names.
872 if (!put_after_lookup(name, NULL, interface_names)) {
873 dup = true;
874 break;
875 }
876 }
877 }
878 if (dup) {
879 classfile_parse_error("Duplicate interface name in class file %s", CHECK);
880 }
881 }
882 }
883
884 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
885 int constantvalue_index,
886 int signature_index,
887 TRAPS) const {
888 // Make sure the constant pool entry is of a type appropriate to this field
889 guarantee_property(
890 (constantvalue_index > 0 &&
891 constantvalue_index < cp->length()),
892 "Bad initial value index %u in ConstantValue attribute in class file %s",
893 constantvalue_index, CHECK);
894
895 const constantTag value_type = cp->tag_at(constantvalue_index);
896 switch(cp->basic_type_for_signature_at(signature_index)) {
897 case T_LONG: {
898 guarantee_property(value_type.is_long(),
899 "Inconsistent constant value type in class file %s",
900 CHECK);
901 break;
902 }
903 case T_FLOAT: {
904 guarantee_property(value_type.is_float(),
905 "Inconsistent constant value type in class file %s",
906 CHECK);
907 break;
908 }
909 case T_DOUBLE: {
910 guarantee_property(value_type.is_double(),
911 "Inconsistent constant value type in class file %s",
912 CHECK);
913 break;
914 }
915 case T_BYTE:
916 case T_CHAR:
917 case T_SHORT:
918 case T_BOOLEAN:
919 case T_INT: {
920 guarantee_property(value_type.is_int(),
921 "Inconsistent constant value type in class file %s",
922 CHECK);
923 break;
924 }
925 case T_OBJECT: {
926 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
927 && value_type.is_string()),
928 "Bad string initial value in class file %s",
929 CHECK);
930 break;
931 }
932 default: {
933 classfile_parse_error("Unable to set initial value %u in class file %s",
934 constantvalue_index,
935 CHECK);
936 }
937 }
938 }
939
940 class AnnotationCollector : public ResourceObj{
941 public:
942 enum Location { _in_field, _in_method, _in_class };
943 enum ID {
944 _unknown = 0,
945 _method_CallerSensitive,
946 _method_ForceInline,
947 _method_DontInline,
948 _method_InjectedProfile,
949 _method_LambdaForm_Compiled,
950 _method_LambdaForm_Hidden,
951 _method_HotSpotIntrinsicCandidate,
952 _jdk_internal_vm_annotation_Contended,
953 _field_Stable,
954 _jdk_internal_vm_annotation_ReservedStackAccess,
955 _annotation_LIMIT
956 };
957 const Location _location;
958 int _annotations_present;
959 u2 _contended_group;
960
961 AnnotationCollector(Location location)
962 : _location(location), _annotations_present(0)
963 {
964 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
965 }
966 // If this annotation name has an ID, report it (or _none).
967 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
968 // Set the annotation name:
969 void set_annotation(ID id) {
970 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
971 _annotations_present |= nth_bit((int)id);
972 }
973
974 void remove_annotation(ID id) {
975 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
976 _annotations_present &= ~nth_bit((int)id);
977 }
978
979 // Report if the annotation is present.
980 bool has_any_annotations() const { return _annotations_present != 0; }
981 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
982
983 void set_contended_group(u2 group) { _contended_group = group; }
984 u2 contended_group() const { return _contended_group; }
985
986 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
987
988 void set_stable(bool stable) { set_annotation(_field_Stable); }
989 bool is_stable() const { return has_annotation(_field_Stable); }
990 };
991
992 // This class also doubles as a holder for metadata cleanup.
993 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
994 private:
995 ClassLoaderData* _loader_data;
996 AnnotationArray* _field_annotations;
997 AnnotationArray* _field_type_annotations;
998 public:
999 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1000 AnnotationCollector(_in_field),
1001 _loader_data(loader_data),
1002 _field_annotations(NULL),
1003 _field_type_annotations(NULL) {}
1004 ~FieldAnnotationCollector();
1005 void apply_to(FieldInfo* f);
1006 AnnotationArray* field_annotations() { return _field_annotations; }
1007 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1008
1009 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1010 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1011 };
1012
1013 class MethodAnnotationCollector : public AnnotationCollector{
1014 public:
1015 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1016 void apply_to(methodHandle m);
1017 };
1018
1019 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1020 public:
1021 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1022 void apply_to(InstanceKlass* ik);
1023 };
1024
1025
1026 static int skip_annotation_value(const u1*, int, int); // fwd decl
1027
1028 // Skip an annotation. Return >=limit if there is any problem.
1029 static int skip_annotation(const u1* buffer, int limit, int index) {
1030 assert(buffer != NULL, "invariant");
1031 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1032 // value := switch (tag:u1) { ... }
1033 index += 2; // skip atype
1034 if ((index += 2) >= limit) return limit; // read nmem
1035 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1036 while (--nmem >= 0 && index < limit) {
1037 index += 2; // skip member
1038 index = skip_annotation_value(buffer, limit, index);
1039 }
1040 return index;
1041 }
1042
1043 // Skip an annotation value. Return >=limit if there is any problem.
1044 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1045 assert(buffer != NULL, "invariant");
1046
1047 // value := switch (tag:u1) {
1048 // case B, C, I, S, Z, D, F, J, c: con:u2;
1049 // case e: e_class:u2 e_name:u2;
1050 // case s: s_con:u2;
1051 // case [: do(nval:u2) {value};
1052 // case @: annotation;
1053 // case s: s_con:u2;
1054 // }
1055 if ((index += 1) >= limit) return limit; // read tag
1056 const u1 tag = buffer[index - 1];
1057 switch (tag) {
1058 case 'B':
1059 case 'C':
1060 case 'I':
1061 case 'S':
1062 case 'Z':
1063 case 'D':
1064 case 'F':
1065 case 'J':
1066 case 'c':
1067 case 's':
1068 index += 2; // skip con or s_con
1069 break;
1070 case 'e':
1071 index += 4; // skip e_class, e_name
1072 break;
1073 case '[':
1074 {
1075 if ((index += 2) >= limit) return limit; // read nval
1076 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1077 while (--nval >= 0 && index < limit) {
1078 index = skip_annotation_value(buffer, limit, index);
1079 }
1080 }
1081 break;
1082 case '@':
1083 index = skip_annotation(buffer, limit, index);
1084 break;
1085 default:
1086 return limit; // bad tag byte
1087 }
1088 return index;
1089 }
1090
1091 // Sift through annotations, looking for those significant to the VM:
1092 static void parse_annotations(const ConstantPool* const cp,
1093 const u1* buffer, int limit,
1094 AnnotationCollector* coll,
1095 ClassLoaderData* loader_data,
1096 TRAPS) {
1097
1098 assert(cp != NULL, "invariant");
1099 assert(buffer != NULL, "invariant");
1100 assert(coll != NULL, "invariant");
1101 assert(loader_data != NULL, "invariant");
1102
1103 // annotations := do(nann:u2) {annotation}
1104 int index = 0;
1105 if ((index += 2) >= limit) return; // read nann
1106 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1107 enum { // initial annotation layout
1108 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1109 count_off = 2, // u2 such as 1 (one value)
1110 member_off = 4, // utf8 such as 'value'
1111 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1112 e_tag_val = 'e',
1113 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1114 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1115 e_size = 11, // end of 'e' annotation
1116 c_tag_val = 'c', // payload is type
1117 c_con_off = 7, // utf8 payload, such as 'I'
1118 c_size = 9, // end of 'c' annotation
1119 s_tag_val = 's', // payload is String
1120 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1121 s_size = 9,
1122 min_size = 6 // smallest possible size (zero members)
1123 };
1124 while ((--nann) >= 0 && (index - 2 + min_size <= limit)) {
1125 int index0 = index;
1126 index = skip_annotation(buffer, limit, index);
1127 const u1* const abase = buffer + index0;
1128 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1129 const int count = Bytes::get_Java_u2((address)abase + count_off);
1130 const Symbol* const aname = check_symbol_at(cp, atype);
1131 if (aname == NULL) break; // invalid annotation name
1132 const Symbol* member = NULL;
1133 if (count >= 1) {
1134 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1135 member = check_symbol_at(cp, member_index);
1136 if (member == NULL) break; // invalid member name
1137 }
1138
1139 // Here is where parsing particular annotations will take place.
1140 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1141 if (AnnotationCollector::_unknown == id) continue;
1142 coll->set_annotation(id);
1143
1144 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1145 // @Contended can optionally specify the contention group.
1146 //
1147 // Contended group defines the equivalence class over the fields:
1148 // the fields within the same contended group are not treated distinct.
1149 // The only exception is default group, which does not incur the
1150 // equivalence. Naturally, contention group for classes is meaningless.
1151 //
1152 // While the contention group is specified as String, annotation
1153 // values are already interned, and we might as well use the constant
1154 // pool index as the group tag.
1155 //
1156 u2 group_index = 0; // default contended group
1157 if (count == 1
1158 && s_size == (index - index0) // match size
1159 && s_tag_val == *(abase + tag_off)
1160 && member == vmSymbols::value_name()) {
1161 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1162 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1163 group_index = 0; // default contended group
1164 }
1165 }
1166 coll->set_contended_group(group_index);
1167 }
1168 }
1169 }
1170
1171
1172 // Parse attributes for a field.
1173 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1174 u2 attributes_count,
1175 bool is_static, u2 signature_index,
1176 u2* const constantvalue_index_addr,
1177 bool* const is_synthetic_addr,
1178 u2* const generic_signature_index_addr,
1179 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1180 TRAPS) {
1181 assert(cfs != NULL, "invariant");
1182 assert(constantvalue_index_addr != NULL, "invariant");
1183 assert(is_synthetic_addr != NULL, "invariant");
1184 assert(generic_signature_index_addr != NULL, "invariant");
1185 assert(parsed_annotations != NULL, "invariant");
1186 assert(attributes_count > 0, "attributes_count should be greater than 0");
1187
1188 u2 constantvalue_index = 0;
1189 u2 generic_signature_index = 0;
1190 bool is_synthetic = false;
1191 const u1* runtime_visible_annotations = NULL;
1192 int runtime_visible_annotations_length = 0;
1193 const u1* runtime_invisible_annotations = NULL;
1194 int runtime_invisible_annotations_length = 0;
1195 const u1* runtime_visible_type_annotations = NULL;
1196 int runtime_visible_type_annotations_length = 0;
1197 const u1* runtime_invisible_type_annotations = NULL;
1198 int runtime_invisible_type_annotations_length = 0;
1199 bool runtime_invisible_annotations_exists = false;
1200 bool runtime_invisible_type_annotations_exists = false;
1201 const ConstantPool* const cp = _cp;
1202
1203 while (attributes_count--) {
1204 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1205 const u2 attribute_name_index = cfs->get_u2_fast();
1206 const u4 attribute_length = cfs->get_u4_fast();
1207 check_property(valid_symbol_at(attribute_name_index),
1208 "Invalid field attribute index %u in class file %s",
1209 attribute_name_index,
1210 CHECK);
1211
1212 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1213 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1214 // ignore if non-static
1215 if (constantvalue_index != 0) {
1216 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1217 }
1218 check_property(
1219 attribute_length == 2,
1220 "Invalid ConstantValue field attribute length %u in class file %s",
1221 attribute_length, CHECK);
1222
1223 constantvalue_index = cfs->get_u2(CHECK);
1224 if (_need_verify) {
1225 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1226 }
1227 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1228 if (attribute_length != 0) {
1229 classfile_parse_error(
1230 "Invalid Synthetic field attribute length %u in class file %s",
1231 attribute_length, CHECK);
1232 }
1233 is_synthetic = true;
1234 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1235 if (attribute_length != 0) {
1236 classfile_parse_error(
1237 "Invalid Deprecated field attribute length %u in class file %s",
1238 attribute_length, CHECK);
1239 }
1240 } else if (_major_version >= JAVA_1_5_VERSION) {
1241 if (attribute_name == vmSymbols::tag_signature()) {
1242 if (attribute_length != 2) {
1243 classfile_parse_error(
1244 "Wrong size %u for field's Signature attribute in class file %s",
1245 attribute_length, CHECK);
1246 }
1247 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1248 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1249 if (runtime_visible_annotations != NULL) {
1250 classfile_parse_error(
1251 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1252 }
1253 runtime_visible_annotations_length = attribute_length;
1254 runtime_visible_annotations = cfs->get_u1_buffer();
1255 assert(runtime_visible_annotations != NULL, "null visible annotations");
1256 parse_annotations(cp,
1257 runtime_visible_annotations,
1258 runtime_visible_annotations_length,
1259 parsed_annotations,
1260 _loader_data,
1261 CHECK);
1262 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
1263 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1264 if (runtime_invisible_annotations_exists) {
1265 classfile_parse_error(
1266 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1267 }
1268 runtime_invisible_annotations_exists = true;
1269 if (PreserveAllAnnotations) {
1270 runtime_invisible_annotations_length = attribute_length;
1271 runtime_invisible_annotations = cfs->get_u1_buffer();
1272 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1273 }
1274 cfs->skip_u1(attribute_length, CHECK);
1275 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1276 if (runtime_visible_type_annotations != NULL) {
1277 classfile_parse_error(
1278 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1279 }
1280 runtime_visible_type_annotations_length = attribute_length;
1281 runtime_visible_type_annotations = cfs->get_u1_buffer();
1282 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1283 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1284 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1285 if (runtime_invisible_type_annotations_exists) {
1286 classfile_parse_error(
1287 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1288 } else {
1289 runtime_invisible_type_annotations_exists = true;
1290 }
1291 if (PreserveAllAnnotations) {
1292 runtime_invisible_type_annotations_length = attribute_length;
1293 runtime_invisible_type_annotations = cfs->get_u1_buffer();
1294 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1295 }
1296 cfs->skip_u1(attribute_length, CHECK);
1297 } else {
1298 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1299 }
1300 } else {
1301 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1302 }
1303 }
1304
1305 *constantvalue_index_addr = constantvalue_index;
1306 *is_synthetic_addr = is_synthetic;
1307 *generic_signature_index_addr = generic_signature_index;
1308 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1309 runtime_visible_annotations_length,
1310 runtime_invisible_annotations,
1311 runtime_invisible_annotations_length,
1312 CHECK);
1313 parsed_annotations->set_field_annotations(a);
1314 a = assemble_annotations(runtime_visible_type_annotations,
1315 runtime_visible_type_annotations_length,
1316 runtime_invisible_type_annotations,
1317 runtime_invisible_type_annotations_length,
1318 CHECK);
1319 parsed_annotations->set_field_type_annotations(a);
1320 return;
1321 }
1322
1323
1324 // Field allocation types. Used for computing field offsets.
1325
1326 enum FieldAllocationType {
1327 STATIC_OOP, // Oops
1328 STATIC_BYTE, // Boolean, Byte, char
1329 STATIC_SHORT, // shorts
1330 STATIC_WORD, // ints
1331 STATIC_DOUBLE, // aligned long or double
1332 NONSTATIC_OOP,
1333 NONSTATIC_BYTE,
1334 NONSTATIC_SHORT,
1335 NONSTATIC_WORD,
1336 NONSTATIC_DOUBLE,
1337 MAX_FIELD_ALLOCATION_TYPE,
1338 BAD_ALLOCATION_TYPE = -1
1339 };
1340
1341 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1342 BAD_ALLOCATION_TYPE, // 0
1343 BAD_ALLOCATION_TYPE, // 1
1344 BAD_ALLOCATION_TYPE, // 2
1345 BAD_ALLOCATION_TYPE, // 3
1346 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1347 NONSTATIC_SHORT, // T_CHAR = 5,
1348 NONSTATIC_WORD, // T_FLOAT = 6,
1349 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1350 NONSTATIC_BYTE, // T_BYTE = 8,
1351 NONSTATIC_SHORT, // T_SHORT = 9,
1352 NONSTATIC_WORD, // T_INT = 10,
1353 NONSTATIC_DOUBLE, // T_LONG = 11,
1354 NONSTATIC_OOP, // T_OBJECT = 12,
1355 NONSTATIC_OOP, // T_ARRAY = 13,
1356 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1357 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1358 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1359 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1360 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1361 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1362 BAD_ALLOCATION_TYPE, // 0
1363 BAD_ALLOCATION_TYPE, // 1
1364 BAD_ALLOCATION_TYPE, // 2
1365 BAD_ALLOCATION_TYPE, // 3
1366 STATIC_BYTE , // T_BOOLEAN = 4,
1367 STATIC_SHORT, // T_CHAR = 5,
1368 STATIC_WORD, // T_FLOAT = 6,
1369 STATIC_DOUBLE, // T_DOUBLE = 7,
1370 STATIC_BYTE, // T_BYTE = 8,
1371 STATIC_SHORT, // T_SHORT = 9,
1372 STATIC_WORD, // T_INT = 10,
1373 STATIC_DOUBLE, // T_LONG = 11,
1374 STATIC_OOP, // T_OBJECT = 12,
1375 STATIC_OOP, // T_ARRAY = 13,
1376 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1377 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1378 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1379 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1380 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1381 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1382 };
1383
1384 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1385 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1386 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1387 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1388 return result;
1389 }
1390
1391 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1392 public:
1393 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1394
1395 FieldAllocationCount() {
1396 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1397 count[i] = 0;
1398 }
1399 }
1400
1401 FieldAllocationType update(bool is_static, BasicType type) {
1402 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1403 // Make sure there is no overflow with injected fields.
1404 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1405 count[atype]++;
1406 return atype;
1407 }
1408 };
1409
1410 // Side-effects: populates the _fields, _fields_annotations,
1411 // _fields_type_annotations fields
1412 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1413 bool is_interface,
1414 FieldAllocationCount* const fac,
1415 ConstantPool* cp,
1416 const int cp_size,
1417 u2* const java_fields_count_ptr,
1418 TRAPS) {
1419
1420 assert(cfs != NULL, "invariant");
1421 assert(fac != NULL, "invariant");
1422 assert(cp != NULL, "invariant");
1423 assert(java_fields_count_ptr != NULL, "invariant");
1424
1425 assert(NULL == _fields, "invariant");
1426 assert(NULL == _fields_annotations, "invariant");
1427 assert(NULL == _fields_type_annotations, "invariant");
1428
1429 cfs->guarantee_more(2, CHECK); // length
1430 const u2 length = cfs->get_u2_fast();
1431 *java_fields_count_ptr = length;
1432
1433 int num_injected = 0;
1434 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1435 &num_injected);
1436 const int total_fields = length + num_injected;
1437
1438 // The field array starts with tuples of shorts
1439 // [access, name index, sig index, initial value index, byte offset].
1440 // A generic signature slot only exists for field with generic
1441 // signature attribute. And the access flag is set with
1442 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1443 // signature slots are at the end of the field array and after all
1444 // other fields data.
1445 //
1446 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1447 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1448 // ...
1449 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1450 // [generic signature index]
1451 // [generic signature index]
1452 // ...
1453 //
1454 // Allocate a temporary resource array for field data. For each field,
1455 // a slot is reserved in the temporary array for the generic signature
1456 // index. After parsing all fields, the data are copied to a permanent
1457 // array and any unused slots will be discarded.
1458 ResourceMark rm(THREAD);
1459 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1460 u2,
1461 total_fields * (FieldInfo::field_slots + 1));
1462
1463 // The generic signature slots start after all other fields' data.
1464 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1465 int num_generic_signature = 0;
1466 for (int n = 0; n < length; n++) {
1467 // access_flags, name_index, descriptor_index, attributes_count
1468 cfs->guarantee_more(8, CHECK);
1469
1470 AccessFlags access_flags;
1471 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1472 verify_legal_field_modifiers(flags, is_interface, CHECK);
1473 access_flags.set_flags(flags);
1474
1475 const u2 name_index = cfs->get_u2_fast();
1476 check_property(valid_symbol_at(name_index),
1477 "Invalid constant pool index %u for field name in class file %s",
1478 name_index, CHECK);
1479 const Symbol* const name = cp->symbol_at(name_index);
1480 verify_legal_field_name(name, CHECK);
1481
1482 const u2 signature_index = cfs->get_u2_fast();
1483 check_property(valid_symbol_at(signature_index),
1484 "Invalid constant pool index %u for field signature in class file %s",
1485 signature_index, CHECK);
1486 const Symbol* const sig = cp->symbol_at(signature_index);
1487 verify_legal_field_signature(name, sig, CHECK);
1488
1489 u2 constantvalue_index = 0;
1490 bool is_synthetic = false;
1491 u2 generic_signature_index = 0;
1492 const bool is_static = access_flags.is_static();
1493 FieldAnnotationCollector parsed_annotations(_loader_data);
1494
1495 const u2 attributes_count = cfs->get_u2_fast();
1496 if (attributes_count > 0) {
1497 parse_field_attributes(cfs,
1498 attributes_count,
1499 is_static,
1500 signature_index,
1501 &constantvalue_index,
1502 &is_synthetic,
1503 &generic_signature_index,
1504 &parsed_annotations,
1505 CHECK);
1506
1507 if (parsed_annotations.field_annotations() != NULL) {
1508 if (_fields_annotations == NULL) {
1509 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1510 _loader_data, length, NULL,
1511 CHECK);
1512 }
1513 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1514 parsed_annotations.set_field_annotations(NULL);
1515 }
1516 if (parsed_annotations.field_type_annotations() != NULL) {
1517 if (_fields_type_annotations == NULL) {
1518 _fields_type_annotations =
1519 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1520 length,
1521 NULL,
1522 CHECK);
1523 }
1524 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1525 parsed_annotations.set_field_type_annotations(NULL);
1526 }
1527
1528 if (is_synthetic) {
1529 access_flags.set_is_synthetic();
1530 }
1531 if (generic_signature_index != 0) {
1532 access_flags.set_field_has_generic_signature();
1533 fa[generic_signature_slot] = generic_signature_index;
1534 generic_signature_slot ++;
1535 num_generic_signature ++;
1536 }
1537 }
1538
1539 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1540 field->initialize(access_flags.as_short(),
1541 name_index,
1542 signature_index,
1543 constantvalue_index);
1544 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1545
1546 // Remember how many oops we encountered and compute allocation type
1547 const FieldAllocationType atype = fac->update(is_static, type);
1548 field->set_allocation_type(atype);
1549
1550 // After field is initialized with type, we can augment it with aux info
1551 if (parsed_annotations.has_any_annotations())
1552 parsed_annotations.apply_to(field);
1553 }
1554
1555 int index = length;
1556 if (num_injected != 0) {
1557 for (int n = 0; n < num_injected; n++) {
1558 // Check for duplicates
1559 if (injected[n].may_be_java) {
1560 const Symbol* const name = injected[n].name();
1561 const Symbol* const signature = injected[n].signature();
1562 bool duplicate = false;
1563 for (int i = 0; i < length; i++) {
1564 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1565 if (name == cp->symbol_at(f->name_index()) &&
1566 signature == cp->symbol_at(f->signature_index())) {
1567 // Symbol is desclared in Java so skip this one
1568 duplicate = true;
1569 break;
1570 }
1571 }
1572 if (duplicate) {
1573 // These will be removed from the field array at the end
1574 continue;
1575 }
1576 }
1577
1578 // Injected field
1579 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1580 field->initialize(JVM_ACC_FIELD_INTERNAL,
1581 injected[n].name_index,
1582 injected[n].signature_index,
1583 0);
1584
1585 const BasicType type = FieldType::basic_type(injected[n].signature());
1586
1587 // Remember how many oops we encountered and compute allocation type
1588 const FieldAllocationType atype = fac->update(false, type);
1589 field->set_allocation_type(atype);
1590 index++;
1591 }
1592 }
1593
1594 assert(NULL == _fields, "invariant");
1595
1596 _fields =
1597 MetadataFactory::new_array<u2>(_loader_data,
1598 index * FieldInfo::field_slots + num_generic_signature,
1599 CHECK);
1600 // Sometimes injected fields already exist in the Java source so
1601 // the fields array could be too long. In that case the
1602 // fields array is trimed. Also unused slots that were reserved
1603 // for generic signature indexes are discarded.
1604 {
1605 int i = 0;
1606 for (; i < index * FieldInfo::field_slots; i++) {
1607 _fields->at_put(i, fa[i]);
1608 }
1609 for (int j = total_fields * FieldInfo::field_slots;
1610 j < generic_signature_slot; j++) {
1611 _fields->at_put(i++, fa[j]);
1612 }
1613 assert(_fields->length() == i, "");
1614 }
1615
1616 if (_need_verify && length > 1) {
1617 // Check duplicated fields
1618 ResourceMark rm(THREAD);
1619 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1620 THREAD, NameSigHash*, HASH_ROW_SIZE);
1621 initialize_hashtable(names_and_sigs);
1622 bool dup = false;
1623 {
1624 debug_only(No_Safepoint_Verifier nsv;)
1625 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1626 const Symbol* const name = fs.name();
1627 const Symbol* const sig = fs.signature();
1628 // If no duplicates, add name/signature in hashtable names_and_sigs.
1629 if (!put_after_lookup(name, sig, names_and_sigs)) {
1630 dup = true;
1631 break;
1632 }
1633 }
1634 }
1635 if (dup) {
1636 classfile_parse_error("Duplicate field name&signature in class file %s",
1637 CHECK);
1638 }
1639 }
1640 }
1641
1642
1643 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) {
1644 while (length-- > 0) {
1645 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1646 }
1647 }
1648
1649 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1650 u4 code_length,
1651 u4 exception_table_length,
1652 TRAPS) {
1653 assert(cfs != NULL, "invariant");
1654
1655 const u2* const exception_table_start = cfs->get_u2_buffer();
1656 assert(exception_table_start != NULL, "null exception table");
1657
1658 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1659 // end_pc,
1660 // handler_pc,
1661 // catch_type_index
1662
1663 // Will check legal target after parsing code array in verifier.
1664 if (_need_verify) {
1665 for (unsigned int i = 0; i < exception_table_length; i++) {
1666 const u2 start_pc = cfs->get_u2_fast();
1667 const u2 end_pc = cfs->get_u2_fast();
1668 const u2 handler_pc = cfs->get_u2_fast();
1669 const u2 catch_type_index = cfs->get_u2_fast();
1670 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1671 "Illegal exception table range in class file %s",
1672 CHECK_NULL);
1673 guarantee_property(handler_pc < code_length,
1674 "Illegal exception table handler in class file %s",
1675 CHECK_NULL);
1676 if (catch_type_index != 0) {
1677 guarantee_property(valid_klass_reference_at(catch_type_index),
1678 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1679 }
1680 }
1681 } else {
1682 cfs->skip_u2_fast(exception_table_length * 4);
1683 }
1684 return exception_table_start;
1685 }
1686
1687 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1688 u4 code_length,
1689 CompressedLineNumberWriteStream**const write_stream,
1690 TRAPS) {
1691
1692 const ClassFileStream* const cfs = _stream;
1693 unsigned int num_entries = cfs->get_u2(CHECK);
1694
1695 // Each entry is a u2 start_pc, and a u2 line_number
1696 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1697
1698 // Verify line number attribute and table length
1699 check_property(
1700 code_attribute_length == sizeof(u2) + length_in_bytes,
1701 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1702
1703 cfs->guarantee_more(length_in_bytes, CHECK);
1704
1705 if ((*write_stream) == NULL) {
1706 if (length_in_bytes > fixed_buffer_size) {
1707 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1708 } else {
1709 (*write_stream) = new CompressedLineNumberWriteStream(
1710 _linenumbertable_buffer, fixed_buffer_size);
1711 }
1712 }
1713
1714 while (num_entries-- > 0) {
1715 const u2 bci = cfs->get_u2_fast(); // start_pc
1716 const u2 line = cfs->get_u2_fast(); // line_number
1717 guarantee_property(bci < code_length,
1718 "Invalid pc in LineNumberTable in class file %s", CHECK);
1719 (*write_stream)->write_pair(bci, line);
1720 }
1721 }
1722
1723
1724 class LVT_Hash : public AllStatic {
1725 public:
1726
1727 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1728 /*
1729 * 3-tuple start_bci/length/slot has to be unique key,
1730 * so the following comparison seems to be redundant:
1731 * && elem->name_cp_index == entry->_elem->name_cp_index
1732 */
1733 return (e0.start_bci == e1.start_bci &&
1734 e0.length == e1.length &&
1735 e0.name_cp_index == e1.name_cp_index &&
1736 e0.slot == e1.slot);
1737 }
1738
1739 static unsigned int hash(LocalVariableTableElement const& e0) {
1740 unsigned int raw_hash = e0.start_bci;
1741
1742 raw_hash = e0.length + raw_hash * 37;
1743 raw_hash = e0.name_cp_index + raw_hash * 37;
1744 raw_hash = e0.slot + raw_hash * 37;
1745
1746 return raw_hash;
1747 }
1748 };
1749
1750
1751 // Class file LocalVariableTable elements.
1752 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1753 public:
1754 u2 start_bci;
1755 u2 length;
1756 u2 name_cp_index;
1757 u2 descriptor_cp_index;
1758 u2 slot;
1759 };
1760
1761 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1762 LocalVariableTableElement* const lvt) {
1763 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1764 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1765 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1766 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1767 lvt->signature_cp_index = 0;
1768 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1769 }
1770
1771 // Function is used to parse both attributes:
1772 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1773 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1774 u4 code_length,
1775 u2 max_locals,
1776 u4 code_attribute_length,
1777 u2* const localvariable_table_length,
1778 bool isLVTT,
1779 TRAPS) {
1780 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1781 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1782 const unsigned int size =
1783 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1784
1785 const ConstantPool* const cp = _cp;
1786
1787 // Verify local variable table attribute has right length
1788 if (_need_verify) {
1789 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1790 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1791 }
1792
1793 const u2* const localvariable_table_start = cfs->get_u2_buffer();
1794 assert(localvariable_table_start != NULL, "null local variable table");
1795 if (!_need_verify) {
1796 cfs->skip_u2_fast(size);
1797 } else {
1798 cfs->guarantee_more(size * 2, CHECK_NULL);
1799 for(int i = 0; i < (*localvariable_table_length); i++) {
1800 const u2 start_pc = cfs->get_u2_fast();
1801 const u2 length = cfs->get_u2_fast();
1802 const u2 name_index = cfs->get_u2_fast();
1803 const u2 descriptor_index = cfs->get_u2_fast();
1804 const u2 index = cfs->get_u2_fast();
1805 // Assign to a u4 to avoid overflow
1806 const u4 end_pc = (u4)start_pc + (u4)length;
1807
1808 if (start_pc >= code_length) {
1809 classfile_parse_error(
1810 "Invalid start_pc %u in %s in class file %s",
1811 start_pc, tbl_name, CHECK_NULL);
1812 }
1813 if (end_pc > code_length) {
1814 classfile_parse_error(
1815 "Invalid length %u in %s in class file %s",
1816 length, tbl_name, CHECK_NULL);
1817 }
1818 const int cp_size = cp->length();
1819 guarantee_property(valid_symbol_at(name_index),
1820 "Name index %u in %s has bad constant type in class file %s",
1821 name_index, tbl_name, CHECK_NULL);
1822 guarantee_property(valid_symbol_at(descriptor_index),
1823 "Signature index %u in %s has bad constant type in class file %s",
1824 descriptor_index, tbl_name, CHECK_NULL);
1825
1826 const Symbol* const name = cp->symbol_at(name_index);
1827 const Symbol* const sig = cp->symbol_at(descriptor_index);
1828 verify_legal_field_name(name, CHECK_NULL);
1829 u2 extra_slot = 0;
1830 if (!isLVTT) {
1831 verify_legal_field_signature(name, sig, CHECK_NULL);
1832
1833 // 4894874: check special cases for double and long local variables
1834 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1835 sig == vmSymbols::type_signature(T_LONG)) {
1836 extra_slot = 1;
1837 }
1838 }
1839 guarantee_property((index + extra_slot) < max_locals,
1840 "Invalid index %u in %s in class file %s",
1841 index, tbl_name, CHECK_NULL);
1842 }
1843 }
1844 return localvariable_table_start;
1845 }
1846
1847
1848 void ClassFileParser::parse_type_array(u2 array_length,
1849 u4 code_length,
1850 u4* const u1_index,
1851 u4* const u2_index,
1852 u1* const u1_array,
1853 u2* const u2_array,
1854 TRAPS) {
1855 const ClassFileStream* const cfs = _stream;
1856 u2 index = 0; // index in the array with long/double occupying two slots
1857 u4 i1 = *u1_index;
1858 u4 i2 = *u2_index + 1;
1859 for(int i = 0; i < array_length; i++) {
1860 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1861 index++;
1862 if (tag == ITEM_Long || tag == ITEM_Double) {
1863 index++;
1864 } else if (tag == ITEM_Object) {
1865 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1866 guarantee_property(valid_klass_reference_at(class_index),
1867 "Bad class index %u in StackMap in class file %s",
1868 class_index, CHECK);
1869 } else if (tag == ITEM_Uninitialized) {
1870 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1871 guarantee_property(
1872 offset < code_length,
1873 "Bad uninitialized type offset %u in StackMap in class file %s",
1874 offset, CHECK);
1875 } else {
1876 guarantee_property(
1877 tag <= (u1)ITEM_Uninitialized,
1878 "Unknown variable type %u in StackMap in class file %s",
1879 tag, CHECK);
1880 }
1881 }
1882 u2_array[*u2_index] = index;
1883 *u1_index = i1;
1884 *u2_index = i2;
1885 }
1886
1887 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1888 u4 code_attribute_length,
1889 bool need_verify,
1890 TRAPS) {
1891 assert(cfs != NULL, "invariant");
1892
1893 if (0 == code_attribute_length) {
1894 return NULL;
1895 }
1896
1897 const u1* const stackmap_table_start = cfs->get_u1_buffer();
1898 assert(stackmap_table_start != NULL, "null stackmap table");
1899
1900 // check code_attribute_length first
1901 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1902
1903 if (!need_verify && !DumpSharedSpaces) {
1904 return NULL;
1905 }
1906 return stackmap_table_start;
1907 }
1908
1909 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1910 u2* const checked_exceptions_length,
1911 u4 method_attribute_length,
1912 TRAPS) {
1913 assert(cfs != NULL, "invariant");
1914 assert(checked_exceptions_length != NULL, "invariant");
1915
1916 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1917 *checked_exceptions_length = cfs->get_u2_fast();
1918 const unsigned int size =
1919 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1920 const u2* const checked_exceptions_start = cfs->get_u2_buffer();
1921 assert(checked_exceptions_start != NULL, "null checked exceptions");
1922 if (!_need_verify) {
1923 cfs->skip_u2_fast(size);
1924 } else {
1925 // Verify each value in the checked exception table
1926 u2 checked_exception;
1927 const u2 len = *checked_exceptions_length;
1928 cfs->guarantee_more(2 * len, CHECK_NULL);
1929 for (int i = 0; i < len; i++) {
1930 checked_exception = cfs->get_u2_fast();
1931 check_property(
1932 valid_klass_reference_at(checked_exception),
1933 "Exception name has bad type at constant pool %u in class file %s",
1934 checked_exception, CHECK_NULL);
1935 }
1936 }
1937 // check exceptions attribute length
1938 if (_need_verify) {
1939 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1940 sizeof(u2) * size),
1941 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1942 }
1943 return checked_exceptions_start;
1944 }
1945
1946 void ClassFileParser::throwIllegalSignature(const char* type,
1947 const Symbol* name,
1948 const Symbol* sig,
1949 TRAPS) const {
1950 assert(name != NULL, "invariant");
1951 assert(sig != NULL, "invariant");
1952
1953 ResourceMark rm(THREAD);
1954 Exceptions::fthrow(THREAD_AND_LOCATION,
1955 vmSymbols::java_lang_ClassFormatError(),
1956 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1957 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1958 }
1959
1960 AnnotationCollector::ID
1961 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1962 const Symbol* name) {
1963 const vmSymbols::SID sid = vmSymbols::find_sid(name);
1964 // Privileged code can use all annotations. Other code silently drops some.
1965 const bool privileged = loader_data->is_the_null_class_loader_data() ||
1966 loader_data->is_ext_class_loader_data() ||
1967 loader_data->is_anonymous();
1968 switch (sid) {
1969 case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_reflect_CallerSensitive_signature): {
1970 if (_location != _in_method) break; // only allow for methods
1971 if (!privileged) break; // only allow in privileged code
1972 return _method_CallerSensitive;
1973 }
1974 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_ForceInline_signature): {
1975 if (_location != _in_method) break; // only allow for methods
1976 if (!privileged) break; // only allow in privileged code
1977 return _method_ForceInline;
1978 }
1979 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_DontInline_signature): {
1980 if (_location != _in_method) break; // only allow for methods
1981 if (!privileged) break; // only allow in privileged code
1982 return _method_DontInline;
1983 }
1984 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1985 if (_location != _in_method) break; // only allow for methods
1986 if (!privileged) break; // only allow in privileged code
1987 return _method_InjectedProfile;
1988 }
1989 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
1990 if (_location != _in_method) break; // only allow for methods
1991 if (!privileged) break; // only allow in privileged code
1992 return _method_LambdaForm_Compiled;
1993 }
1994 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
1995 if (_location != _in_method) break; // only allow for methods
1996 if (!privileged) break; // only allow in privileged code
1997 return _method_LambdaForm_Hidden;
1998 }
1999 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2000 if (_location != _in_method) break; // only allow for methods
2001 if (!privileged) break; // only allow in privileged code
2002 return _method_HotSpotIntrinsicCandidate;
2003 }
2004 #if INCLUDE_JVMCI
2005 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_vm_ci_hotspot_Stable_signature): {
2006 if (_location != _in_field) break; // only allow for fields
2007 if (!privileged) break; // only allow in privileged code
2008 return _field_Stable;
2009 }
2010 #endif
2011 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_Stable_signature): {
2012 if (_location != _in_field) break; // only allow for fields
2013 if (!privileged) break; // only allow in privileged code
2014 return _field_Stable;
2015 }
2016 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2017 if (_location != _in_field && _location != _in_class) {
2018 break; // only allow for fields and classes
2019 }
2020 if (!EnableContended || (RestrictContended && !privileged)) {
2021 break; // honor privileges
2022 }
2023 return _jdk_internal_vm_annotation_Contended;
2024 }
2025 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2026 if (_location != _in_method) break; // only allow for methods
2027 if (RestrictReservedStack && !privileged) break; // honor privileges
2028 return _jdk_internal_vm_annotation_ReservedStackAccess;
2029 }
2030 default: {
2031 break;
2032 }
2033 }
2034 return AnnotationCollector::_unknown;
2035 }
2036
2037 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2038 if (is_contended())
2039 f->set_contended_group(contended_group());
2040 if (is_stable())
2041 f->set_stable(true);
2042 }
2043
2044 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2045 // If there's an error deallocate metadata for field annotations
2046 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2047 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2048 }
2049
2050 void MethodAnnotationCollector::apply_to(methodHandle m) {
2051 if (has_annotation(_method_CallerSensitive))
2052 m->set_caller_sensitive(true);
2053 if (has_annotation(_method_ForceInline))
2054 m->set_force_inline(true);
2055 if (has_annotation(_method_DontInline))
2056 m->set_dont_inline(true);
2057 if (has_annotation(_method_InjectedProfile))
2058 m->set_has_injected_profile(true);
2059 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2060 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2061 if (has_annotation(_method_LambdaForm_Hidden))
2062 m->set_hidden(true);
2063 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2064 m->set_intrinsic_candidate(true);
2065 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2066 m->set_has_reserved_stack_access(true);
2067 }
2068
2069 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2070 assert(ik != NULL, "invariant");
2071 ik->set_is_contended(is_contended());
2072 }
2073
2074 #define MAX_ARGS_SIZE 255
2075 #define MAX_CODE_SIZE 65535
2076 #define INITIAL_MAX_LVT_NUMBER 256
2077
2078 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2079 *
2080 * Rules for LVT's and LVTT's are:
2081 * - There can be any number of LVT's and LVTT's.
2082 * - If there are n LVT's, it is the same as if there was just
2083 * one LVT containing all the entries from the n LVT's.
2084 * - There may be no more than one LVT entry per local variable.
2085 * Two LVT entries are 'equal' if these fields are the same:
2086 * start_pc, length, name, slot
2087 * - There may be no more than one LVTT entry per each LVT entry.
2088 * Each LVTT entry has to match some LVT entry.
2089 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2090 */
2091 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2092 int lvt_cnt,
2093 u2* const localvariable_table_length,
2094 const u2**const localvariable_table_start,
2095 int lvtt_cnt,
2096 u2* const localvariable_type_table_length,
2097 const u2**const localvariable_type_table_start,
2098 TRAPS) {
2099
2100 ResourceMark rm(THREAD);
2101
2102 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2103 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2104
2105 LVT_HashTable* const table = new LVT_HashTable();
2106
2107 // To fill LocalVariableTable in
2108 const Classfile_LVT_Element* cf_lvt;
2109 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2110
2111 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2112 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2113 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2114 copy_lvt_element(&cf_lvt[idx], lvt);
2115 // If no duplicates, add LVT elem in hashtable.
2116 if (table->put(*lvt, lvt) == false
2117 && _need_verify
2118 && _major_version >= JAVA_1_5_VERSION) {
2119 classfile_parse_error("Duplicated LocalVariableTable attribute "
2120 "entry for '%s' in class file %s",
2121 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2122 CHECK);
2123 }
2124 }
2125 }
2126
2127 // To merge LocalVariableTable and LocalVariableTypeTable
2128 const Classfile_LVT_Element* cf_lvtt;
2129 LocalVariableTableElement lvtt_elem;
2130
2131 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2132 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2133 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2134 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2135 LocalVariableTableElement** entry = table->get(lvtt_elem);
2136 if (entry == NULL) {
2137 if (_need_verify) {
2138 classfile_parse_error("LVTT entry for '%s' in class file %s "
2139 "does not match any LVT entry",
2140 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2141 CHECK);
2142 }
2143 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2144 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2145 "entry for '%s' in class file %s",
2146 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2147 CHECK);
2148 } else {
2149 // to add generic signatures into LocalVariableTable
2150 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2151 }
2152 }
2153 }
2154 }
2155
2156
2157 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2158 const u1* runtime_visible_annotations,
2159 int runtime_visible_annotations_length,
2160 const u1* runtime_invisible_annotations,
2161 int runtime_invisible_annotations_length,
2162 const u1* runtime_visible_parameter_annotations,
2163 int runtime_visible_parameter_annotations_length,
2164 const u1* runtime_invisible_parameter_annotations,
2165 int runtime_invisible_parameter_annotations_length,
2166 const u1* runtime_visible_type_annotations,
2167 int runtime_visible_type_annotations_length,
2168 const u1* runtime_invisible_type_annotations,
2169 int runtime_invisible_type_annotations_length,
2170 const u1* annotation_default,
2171 int annotation_default_length,
2172 TRAPS) {
2173
2174 AnnotationArray* a;
2175
2176 if (runtime_visible_annotations_length +
2177 runtime_invisible_annotations_length > 0) {
2178 a = assemble_annotations(runtime_visible_annotations,
2179 runtime_visible_annotations_length,
2180 runtime_invisible_annotations,
2181 runtime_invisible_annotations_length,
2182 CHECK);
2183 cm->set_method_annotations(a);
2184 }
2185
2186 if (runtime_visible_parameter_annotations_length +
2187 runtime_invisible_parameter_annotations_length > 0) {
2188 a = assemble_annotations(runtime_visible_parameter_annotations,
2189 runtime_visible_parameter_annotations_length,
2190 runtime_invisible_parameter_annotations,
2191 runtime_invisible_parameter_annotations_length,
2192 CHECK);
2193 cm->set_parameter_annotations(a);
2194 }
2195
2196 if (annotation_default_length > 0) {
2197 a = assemble_annotations(annotation_default,
2198 annotation_default_length,
2199 NULL,
2200 0,
2201 CHECK);
2202 cm->set_default_annotations(a);
2203 }
2204
2205 if (runtime_visible_type_annotations_length +
2206 runtime_invisible_type_annotations_length > 0) {
2207 a = assemble_annotations(runtime_visible_type_annotations,
2208 runtime_visible_type_annotations_length,
2209 runtime_invisible_type_annotations,
2210 runtime_invisible_type_annotations_length,
2211 CHECK);
2212 cm->set_type_annotations(a);
2213 }
2214 }
2215
2216
2217 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2218 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2219 // Method* to save footprint, so we only know the size of the resulting Method* when the
2220 // entire method attribute is parsed.
2221 //
2222 // The promoted_flags parameter is used to pass relevant access_flags
2223 // from the method back up to the containing klass. These flag values
2224 // are added to klass's access_flags.
2225
2226 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2227 bool is_interface,
2228 const ConstantPool* cp,
2229 AccessFlags* const promoted_flags,
2230 TRAPS) {
2231 assert(cfs != NULL, "invariant");
2232 assert(cp != NULL, "invariant");
2233 assert(promoted_flags != NULL, "invariant");
2234
2235 ResourceMark rm(THREAD);
2236 // Parse fixed parts:
2237 // access_flags, name_index, descriptor_index, attributes_count
2238 cfs->guarantee_more(8, CHECK_NULL);
2239
2240 int flags = cfs->get_u2_fast();
2241 const u2 name_index = cfs->get_u2_fast();
2242 const int cp_size = cp->length();
2243 check_property(
2244 valid_symbol_at(name_index),
2245 "Illegal constant pool index %u for method name in class file %s",
2246 name_index, CHECK_NULL);
2247 const Symbol* const name = cp->symbol_at(name_index);
2248 verify_legal_method_name(name, CHECK_NULL);
2249
2250 const u2 signature_index = cfs->get_u2_fast();
2251 guarantee_property(
2252 valid_symbol_at(signature_index),
2253 "Illegal constant pool index %u for method signature in class file %s",
2254 signature_index, CHECK_NULL);
2255 const Symbol* const signature = cp->symbol_at(signature_index);
2256
2257 if (name == vmSymbols::class_initializer_name()) {
2258 // We ignore the other access flags for a valid class initializer.
2259 // (JVM Spec 2nd ed., chapter 4.6)
2260 if (_major_version < 51) { // backward compatibility
2261 flags = JVM_ACC_STATIC;
2262 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2263 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2264 } else {
2265 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2266 }
2267 } else {
2268 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2269 }
2270
2271 if (name == vmSymbols::object_initializer_name() && is_interface) {
2272 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2273 }
2274
2275 int args_size = -1; // only used when _need_verify is true
2276 if (_need_verify) {
2277 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2278 verify_legal_method_signature(name, signature, CHECK_NULL);
2279 if (args_size > MAX_ARGS_SIZE) {
2280 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2281 }
2282 }
2283
2284 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2285
2286 // Default values for code and exceptions attribute elements
2287 u2 max_stack = 0;
2288 u2 max_locals = 0;
2289 u4 code_length = 0;
2290 const u1* code_start = 0;
2291 u2 exception_table_length = 0;
2292 const u2* exception_table_start = NULL;
2293 Array<int>* exception_handlers = Universe::the_empty_int_array();
2294 u2 checked_exceptions_length = 0;
2295 const u2* checked_exceptions_start = NULL;
2296 CompressedLineNumberWriteStream* linenumber_table = NULL;
2297 int linenumber_table_length = 0;
2298 int total_lvt_length = 0;
2299 u2 lvt_cnt = 0;
2300 u2 lvtt_cnt = 0;
2301 bool lvt_allocated = false;
2302 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2303 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2304 u2* localvariable_table_length = NULL;
2305 const u2** localvariable_table_start = NULL;
2306 u2* localvariable_type_table_length = NULL;
2307 const u2** localvariable_type_table_start = NULL;
2308 int method_parameters_length = -1;
2309 const u1* method_parameters_data = NULL;
2310 bool method_parameters_seen = false;
2311 bool parsed_code_attribute = false;
2312 bool parsed_checked_exceptions_attribute = false;
2313 bool parsed_stackmap_attribute = false;
2314 // stackmap attribute - JDK1.5
2315 const u1* stackmap_data = NULL;
2316 int stackmap_data_length = 0;
2317 u2 generic_signature_index = 0;
2318 MethodAnnotationCollector parsed_annotations;
2319 const u1* runtime_visible_annotations = NULL;
2320 int runtime_visible_annotations_length = 0;
2321 const u1* runtime_invisible_annotations = NULL;
2322 int runtime_invisible_annotations_length = 0;
2323 const u1* runtime_visible_parameter_annotations = NULL;
2324 int runtime_visible_parameter_annotations_length = 0;
2325 const u1* runtime_invisible_parameter_annotations = NULL;
2326 int runtime_invisible_parameter_annotations_length = 0;
2327 const u1* runtime_visible_type_annotations = NULL;
2328 int runtime_visible_type_annotations_length = 0;
2329 const u1* runtime_invisible_type_annotations = NULL;
2330 int runtime_invisible_type_annotations_length = 0;
2331 bool runtime_invisible_annotations_exists = false;
2332 bool runtime_invisible_type_annotations_exists = false;
2333 bool runtime_invisible_parameter_annotations_exists = false;
2334 const u1* annotation_default = NULL;
2335 int annotation_default_length = 0;
2336
2337 // Parse code and exceptions attribute
2338 u2 method_attributes_count = cfs->get_u2_fast();
2339 while (method_attributes_count--) {
2340 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2341 const u2 method_attribute_name_index = cfs->get_u2_fast();
2342 const u4 method_attribute_length = cfs->get_u4_fast();
2343 check_property(
2344 valid_symbol_at(method_attribute_name_index),
2345 "Invalid method attribute name index %u in class file %s",
2346 method_attribute_name_index, CHECK_NULL);
2347
2348 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2349 if (method_attribute_name == vmSymbols::tag_code()) {
2350 // Parse Code attribute
2351 if (_need_verify) {
2352 guarantee_property(
2353 !access_flags.is_native() && !access_flags.is_abstract(),
2354 "Code attribute in native or abstract methods in class file %s",
2355 CHECK_NULL);
2356 }
2357 if (parsed_code_attribute) {
2358 classfile_parse_error("Multiple Code attributes in class file %s",
2359 CHECK_NULL);
2360 }
2361 parsed_code_attribute = true;
2362
2363 // Stack size, locals size, and code size
2364 if (_major_version == 45 && _minor_version <= 2) {
2365 cfs->guarantee_more(4, CHECK_NULL);
2366 max_stack = cfs->get_u1_fast();
2367 max_locals = cfs->get_u1_fast();
2368 code_length = cfs->get_u2_fast();
2369 } else {
2370 cfs->guarantee_more(8, CHECK_NULL);
2371 max_stack = cfs->get_u2_fast();
2372 max_locals = cfs->get_u2_fast();
2373 code_length = cfs->get_u4_fast();
2374 }
2375 if (_need_verify) {
2376 guarantee_property(args_size <= max_locals,
2377 "Arguments can't fit into locals in class file %s",
2378 CHECK_NULL);
2379 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2380 "Invalid method Code length %u in class file %s",
2381 code_length, CHECK_NULL);
2382 }
2383 // Code pointer
2384 code_start = cfs->get_u1_buffer();
2385 assert(code_start != NULL, "null code start");
2386 cfs->guarantee_more(code_length, CHECK_NULL);
2387 cfs->skip_u1_fast(code_length);
2388
2389 // Exception handler table
2390 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2391 exception_table_length = cfs->get_u2_fast();
2392 if (exception_table_length > 0) {
2393 exception_table_start = parse_exception_table(cfs,
2394 code_length,
2395 exception_table_length,
2396 CHECK_NULL);
2397 }
2398
2399 // Parse additional attributes in code attribute
2400 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2401 u2 code_attributes_count = cfs->get_u2_fast();
2402
2403 unsigned int calculated_attribute_length = 0;
2404
2405 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2406 calculated_attribute_length =
2407 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2408 } else {
2409 // max_stack, locals and length are smaller in pre-version 45.2 classes
2410 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2411 }
2412 calculated_attribute_length +=
2413 code_length +
2414 sizeof(exception_table_length) +
2415 sizeof(code_attributes_count) +
2416 exception_table_length *
2417 ( sizeof(u2) + // start_pc
2418 sizeof(u2) + // end_pc
2419 sizeof(u2) + // handler_pc
2420 sizeof(u2) ); // catch_type_index
2421
2422 while (code_attributes_count--) {
2423 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2424 const u2 code_attribute_name_index = cfs->get_u2_fast();
2425 const u4 code_attribute_length = cfs->get_u4_fast();
2426 calculated_attribute_length += code_attribute_length +
2427 sizeof(code_attribute_name_index) +
2428 sizeof(code_attribute_length);
2429 check_property(valid_symbol_at(code_attribute_name_index),
2430 "Invalid code attribute name index %u in class file %s",
2431 code_attribute_name_index,
2432 CHECK_NULL);
2433 if (LoadLineNumberTables &&
2434 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2435 // Parse and compress line number table
2436 parse_linenumber_table(code_attribute_length,
2437 code_length,
2438 &linenumber_table,
2439 CHECK_NULL);
2440
2441 } else if (LoadLocalVariableTables &&
2442 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2443 // Parse local variable table
2444 if (!lvt_allocated) {
2445 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2446 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2447 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2448 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2449 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2450 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2451 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2452 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2453 lvt_allocated = true;
2454 }
2455 if (lvt_cnt == max_lvt_cnt) {
2456 max_lvt_cnt <<= 1;
2457 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2458 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2459 }
2460 localvariable_table_start[lvt_cnt] =
2461 parse_localvariable_table(cfs,
2462 code_length,
2463 max_locals,
2464 code_attribute_length,
2465 &localvariable_table_length[lvt_cnt],
2466 false, // is not LVTT
2467 CHECK_NULL);
2468 total_lvt_length += localvariable_table_length[lvt_cnt];
2469 lvt_cnt++;
2470 } else if (LoadLocalVariableTypeTables &&
2471 _major_version >= JAVA_1_5_VERSION &&
2472 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2473 if (!lvt_allocated) {
2474 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2475 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2476 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2477 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2478 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2479 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2480 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2481 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2482 lvt_allocated = true;
2483 }
2484 // Parse local variable type table
2485 if (lvtt_cnt == max_lvtt_cnt) {
2486 max_lvtt_cnt <<= 1;
2487 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2488 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2489 }
2490 localvariable_type_table_start[lvtt_cnt] =
2491 parse_localvariable_table(cfs,
2492 code_length,
2493 max_locals,
2494 code_attribute_length,
2495 &localvariable_type_table_length[lvtt_cnt],
2496 true, // is LVTT
2497 CHECK_NULL);
2498 lvtt_cnt++;
2499 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2500 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2501 // Stack map is only needed by the new verifier in JDK1.5.
2502 if (parsed_stackmap_attribute) {
2503 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2504 }
2505 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2506 stackmap_data_length = code_attribute_length;
2507 parsed_stackmap_attribute = true;
2508 } else {
2509 // Skip unknown attributes
2510 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2511 }
2512 }
2513 // check method attribute length
2514 if (_need_verify) {
2515 guarantee_property(method_attribute_length == calculated_attribute_length,
2516 "Code segment has wrong length in class file %s",
2517 CHECK_NULL);
2518 }
2519 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2520 // Parse Exceptions attribute
2521 if (parsed_checked_exceptions_attribute) {
2522 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2523 CHECK_NULL);
2524 }
2525 parsed_checked_exceptions_attribute = true;
2526 checked_exceptions_start =
2527 parse_checked_exceptions(cfs,
2528 &checked_exceptions_length,
2529 method_attribute_length,
2530 CHECK_NULL);
2531 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2532 // reject multiple method parameters
2533 if (method_parameters_seen) {
2534 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2535 CHECK_NULL);
2536 }
2537 method_parameters_seen = true;
2538 method_parameters_length = cfs->get_u1_fast();
2539 const u2 real_length = (method_parameters_length * 4u) + 1u;
2540 if (method_attribute_length != real_length) {
2541 classfile_parse_error(
2542 "Invalid MethodParameters method attribute length %u in class file",
2543 method_attribute_length, CHECK_NULL);
2544 }
2545 method_parameters_data = cfs->get_u1_buffer();
2546 cfs->skip_u2_fast(method_parameters_length);
2547 cfs->skip_u2_fast(method_parameters_length);
2548 // ignore this attribute if it cannot be reflected
2549 if (!SystemDictionary::Parameter_klass_loaded())
2550 method_parameters_length = -1;
2551 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2552 if (method_attribute_length != 0) {
2553 classfile_parse_error(
2554 "Invalid Synthetic method attribute length %u in class file %s",
2555 method_attribute_length, CHECK_NULL);
2556 }
2557 // Should we check that there hasn't already been a synthetic attribute?
2558 access_flags.set_is_synthetic();
2559 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2560 if (method_attribute_length != 0) {
2561 classfile_parse_error(
2562 "Invalid Deprecated method attribute length %u in class file %s",
2563 method_attribute_length, CHECK_NULL);
2564 }
2565 } else if (_major_version >= JAVA_1_5_VERSION) {
2566 if (method_attribute_name == vmSymbols::tag_signature()) {
2567 if (method_attribute_length != 2) {
2568 classfile_parse_error(
2569 "Invalid Signature attribute length %u in class file %s",
2570 method_attribute_length, CHECK_NULL);
2571 }
2572 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2573 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2574 if (runtime_visible_annotations != NULL) {
2575 classfile_parse_error(
2576 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2577 CHECK_NULL);
2578 }
2579 runtime_visible_annotations_length = method_attribute_length;
2580 runtime_visible_annotations = cfs->get_u1_buffer();
2581 assert(runtime_visible_annotations != NULL, "null visible annotations");
2582 parse_annotations(cp,
2583 runtime_visible_annotations,
2584 runtime_visible_annotations_length,
2585 &parsed_annotations,
2586 _loader_data,
2587 CHECK_NULL);
2588 cfs->skip_u1(runtime_visible_annotations_length, CHECK_NULL);
2589 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2590 if (runtime_invisible_annotations_exists) {
2591 classfile_parse_error(
2592 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2593 CHECK_NULL);
2594 }
2595 runtime_invisible_annotations_exists = true;
2596 if (PreserveAllAnnotations) {
2597 runtime_invisible_annotations_length = method_attribute_length;
2598 runtime_invisible_annotations = cfs->get_u1_buffer();
2599 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2600 }
2601 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2602 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2603 if (runtime_visible_parameter_annotations != NULL) {
2604 classfile_parse_error(
2605 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2606 CHECK_NULL);
2607 }
2608 runtime_visible_parameter_annotations_length = method_attribute_length;
2609 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2610 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2611 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2612 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2613 if (runtime_invisible_parameter_annotations_exists) {
2614 classfile_parse_error(
2615 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2616 CHECK_NULL);
2617 }
2618 runtime_invisible_parameter_annotations_exists = true;
2619 if (PreserveAllAnnotations) {
2620 runtime_invisible_parameter_annotations_length = method_attribute_length;
2621 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2622 assert(runtime_invisible_parameter_annotations != NULL,
2623 "null invisible parameter annotations");
2624 }
2625 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2626 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2627 if (annotation_default != NULL) {
2628 classfile_parse_error(
2629 "Multiple AnnotationDefault attributes for method in class file %s",
2630 CHECK_NULL);
2631 }
2632 annotation_default_length = method_attribute_length;
2633 annotation_default = cfs->get_u1_buffer();
2634 assert(annotation_default != NULL, "null annotation default");
2635 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2636 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2637 if (runtime_visible_type_annotations != NULL) {
2638 classfile_parse_error(
2639 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2640 CHECK_NULL);
2641 }
2642 runtime_visible_type_annotations_length = method_attribute_length;
2643 runtime_visible_type_annotations = cfs->get_u1_buffer();
2644 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2645 // No need for the VM to parse Type annotations
2646 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2647 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2648 if (runtime_invisible_type_annotations_exists) {
2649 classfile_parse_error(
2650 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2651 CHECK_NULL);
2652 } else {
2653 runtime_invisible_type_annotations_exists = true;
2654 }
2655 if (PreserveAllAnnotations) {
2656 runtime_invisible_type_annotations_length = method_attribute_length;
2657 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2658 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2659 }
2660 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2661 } else {
2662 // Skip unknown attributes
2663 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2664 }
2665 } else {
2666 // Skip unknown attributes
2667 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2668 }
2669 }
2670
2671 if (linenumber_table != NULL) {
2672 linenumber_table->write_terminator();
2673 linenumber_table_length = linenumber_table->position();
2674 }
2675
2676 // Make sure there's at least one Code attribute in non-native/non-abstract method
2677 if (_need_verify) {
2678 guarantee_property(access_flags.is_native() ||
2679 access_flags.is_abstract() ||
2680 parsed_code_attribute,
2681 "Absent Code attribute in method that is not native or abstract in class file %s",
2682 CHECK_NULL);
2683 }
2684
2685 // All sizing information for a Method* is finally available, now create it
2686 InlineTableSizes sizes(
2687 total_lvt_length,
2688 linenumber_table_length,
2689 exception_table_length,
2690 checked_exceptions_length,
2691 method_parameters_length,
2692 generic_signature_index,
2693 runtime_visible_annotations_length +
2694 runtime_invisible_annotations_length,
2695 runtime_visible_parameter_annotations_length +
2696 runtime_invisible_parameter_annotations_length,
2697 runtime_visible_type_annotations_length +
2698 runtime_invisible_type_annotations_length,
2699 annotation_default_length,
2700 0);
2701
2702 Method* const m = Method::allocate(_loader_data,
2703 code_length,
2704 access_flags,
2705 &sizes,
2706 ConstMethod::NORMAL,
2707 CHECK_NULL);
2708
2709 ClassLoadingService::add_class_method_size(m->size()*HeapWordSize);
2710
2711 // Fill in information from fixed part (access_flags already set)
2712 m->set_constants(_cp);
2713 m->set_name_index(name_index);
2714 m->set_signature_index(signature_index);
2715 #ifdef CC_INTERP
2716 // hmm is there a gc issue here??
2717 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2718 m->set_result_index(rtf.type());
2719 #endif
2720
2721 if (args_size >= 0) {
2722 m->set_size_of_parameters(args_size);
2723 } else {
2724 m->compute_size_of_parameters(THREAD);
2725 }
2726 #ifdef ASSERT
2727 if (args_size >= 0) {
2728 m->compute_size_of_parameters(THREAD);
2729 assert(args_size == m->size_of_parameters(), "");
2730 }
2731 #endif
2732
2733 // Fill in code attribute information
2734 m->set_max_stack(max_stack);
2735 m->set_max_locals(max_locals);
2736 if (stackmap_data != NULL) {
2737 m->constMethod()->copy_stackmap_data(_loader_data,
2738 (u1*)stackmap_data,
2739 stackmap_data_length,
2740 CHECK_NULL);
2741 }
2742
2743 // Copy byte codes
2744 m->set_code((u1*)code_start);
2745
2746 // Copy line number table
2747 if (linenumber_table != NULL) {
2748 memcpy(m->compressed_linenumber_table(),
2749 linenumber_table->buffer(),
2750 linenumber_table_length);
2751 }
2752
2753 // Copy exception table
2754 if (exception_table_length > 0) {
2755 int size =
2756 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2757 copy_u2_with_conversion((u2*) m->exception_table_start(),
2758 exception_table_start, size);
2759 }
2760
2761 // Copy method parameters
2762 if (method_parameters_length > 0) {
2763 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2764 for (int i = 0; i < method_parameters_length; i++) {
2765 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2766 method_parameters_data += 2;
2767 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2768 method_parameters_data += 2;
2769 }
2770 }
2771
2772 // Copy checked exceptions
2773 if (checked_exceptions_length > 0) {
2774 const int size =
2775 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2776 copy_u2_with_conversion((u2*) m->checked_exceptions_start(),
2777 checked_exceptions_start,
2778 size);
2779 }
2780
2781 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2782 if (total_lvt_length > 0) {
2783 promoted_flags->set_has_localvariable_table();
2784 copy_localvariable_table(m->constMethod(),
2785 lvt_cnt,
2786 localvariable_table_length,
2787 localvariable_table_start,
2788 lvtt_cnt,
2789 localvariable_type_table_length,
2790 localvariable_type_table_start,
2791 CHECK_NULL);
2792 }
2793
2794 if (parsed_annotations.has_any_annotations())
2795 parsed_annotations.apply_to(m);
2796
2797 // Copy annotations
2798 copy_method_annotations(m->constMethod(),
2799 runtime_visible_annotations,
2800 runtime_visible_annotations_length,
2801 runtime_invisible_annotations,
2802 runtime_invisible_annotations_length,
2803 runtime_visible_parameter_annotations,
2804 runtime_visible_parameter_annotations_length,
2805 runtime_invisible_parameter_annotations,
2806 runtime_invisible_parameter_annotations_length,
2807 runtime_visible_type_annotations,
2808 runtime_visible_type_annotations_length,
2809 runtime_invisible_type_annotations,
2810 runtime_invisible_type_annotations_length,
2811 annotation_default,
2812 annotation_default_length,
2813 CHECK_NULL);
2814
2815 if (name == vmSymbols::finalize_method_name() &&
2816 signature == vmSymbols::void_method_signature()) {
2817 if (m->is_empty_method()) {
2818 _has_empty_finalizer = true;
2819 } else {
2820 _has_finalizer = true;
2821 }
2822 }
2823 if (name == vmSymbols::object_initializer_name() &&
2824 signature == vmSymbols::void_method_signature() &&
2825 m->is_vanilla_constructor()) {
2826 _has_vanilla_constructor = true;
2827 }
2828
2829 NOT_PRODUCT(m->verify());
2830 return m;
2831 }
2832
2833
2834 // The promoted_flags parameter is used to pass relevant access_flags
2835 // from the methods back up to the containing klass. These flag values
2836 // are added to klass's access_flags.
2837 // Side-effects: populates the _methods field in the parser
2838 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2839 bool is_interface,
2840 AccessFlags* promoted_flags,
2841 bool* has_final_method,
2842 bool* declares_default_methods,
2843 TRAPS) {
2844 assert(cfs != NULL, "invariant");
2845 assert(promoted_flags != NULL, "invariant");
2846 assert(has_final_method != NULL, "invariant");
2847 assert(declares_default_methods != NULL, "invariant");
2848
2849 assert(NULL == _methods, "invariant");
2850
2851 cfs->guarantee_more(2, CHECK); // length
2852 const u2 length = cfs->get_u2_fast();
2853 if (length == 0) {
2854 _methods = Universe::the_empty_method_array();
2855 } else {
2856 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2857 length,
2858 NULL,
2859 CHECK);
2860
2861 HandleMark hm(THREAD);
2862 for (int index = 0; index < length; index++) {
2863 Method* method = parse_method(cfs,
2864 is_interface,
2865 _cp,
2866 promoted_flags,
2867 CHECK);
2868
2869 if (method->is_final()) {
2870 *has_final_method = true;
2871 }
2872 // declares_default_methods: declares concrete instance methods, any access flags
2873 // used for interface initialization, and default method inheritance analysis
2874 if (is_interface && !(*declares_default_methods)
2875 && !method->is_abstract() && !method->is_static()) {
2876 *declares_default_methods = true;
2877 }
2878 _methods->at_put(index, method);
2879 }
2880
2881 if (_need_verify && length > 1) {
2882 // Check duplicated methods
2883 ResourceMark rm(THREAD);
2884 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2885 THREAD, NameSigHash*, HASH_ROW_SIZE);
2886 initialize_hashtable(names_and_sigs);
2887 bool dup = false;
2888 {
2889 debug_only(No_Safepoint_Verifier nsv;)
2890 for (int i = 0; i < length; i++) {
2891 const Method* const m = _methods->at(i);
2892 // If no duplicates, add name/signature in hashtable names_and_sigs.
2893 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2894 dup = true;
2895 break;
2896 }
2897 }
2898 }
2899 if (dup) {
2900 classfile_parse_error("Duplicate method name&signature in class file %s",
2901 CHECK);
2902 }
2903 }
2904 }
2905 }
2906
2907 static const intArray* sort_methods(Array<Method*>* methods) {
2908 const int length = methods->length();
2909 // If JVMTI original method ordering or sharing is enabled we have to
2910 // remember the original class file ordering.
2911 // We temporarily use the vtable_index field in the Method* to store the
2912 // class file index, so we can read in after calling qsort.
2913 // Put the method ordering in the shared archive.
2914 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2915 for (int index = 0; index < length; index++) {
2916 Method* const m = methods->at(index);
2917 assert(!m->valid_vtable_index(), "vtable index should not be set");
2918 m->set_vtable_index(index);
2919 }
2920 }
2921 // Sort method array by ascending method name (for faster lookups & vtable construction)
2922 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2923 Method::sort_methods(methods);
2924
2925 intArray* method_ordering = NULL;
2926 // If JVMTI original method ordering or sharing is enabled construct int
2927 // array remembering the original ordering
2928 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2929 method_ordering = new intArray(length);
2930 for (int index = 0; index < length; index++) {
2931 Method* const m = methods->at(index);
2932 const int old_index = m->vtable_index();
2933 assert(old_index >= 0 && old_index < length, "invalid method index");
2934 method_ordering->at_put(index, old_index);
2935 m->set_vtable_index(Method::invalid_vtable_index);
2936 }
2937 }
2938 return method_ordering;
2939 }
2940
2941 // Parse generic_signature attribute for methods and fields
2942 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2943 TRAPS) {
2944 assert(cfs != NULL, "invariant");
2945
2946 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2947 const u2 generic_signature_index = cfs->get_u2_fast();
2948 check_property(
2949 valid_symbol_at(generic_signature_index),
2950 "Invalid Signature attribute at constant pool index %u in class file %s",
2951 generic_signature_index, CHECK_0);
2952 return generic_signature_index;
2953 }
2954
2955 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2956 TRAPS) {
2957
2958 assert(cfs != NULL, "invariant");
2959
2960 cfs->guarantee_more(2, CHECK); // sourcefile_index
2961 const u2 sourcefile_index = cfs->get_u2_fast();
2962 check_property(
2963 valid_symbol_at(sourcefile_index),
2964 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2965 sourcefile_index, CHECK);
2966 set_class_sourcefile_index(sourcefile_index);
2967 }
2968
2969 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2970 int length,
2971 TRAPS) {
2972 assert(cfs != NULL, "invariant");
2973
2974 const u1* const sde_buffer = cfs->get_u1_buffer();
2975 assert(sde_buffer != NULL, "null sde buffer");
2976
2977 // Don't bother storing it if there is no way to retrieve it
2978 if (JvmtiExport::can_get_source_debug_extension()) {
2979 assert((length+1) > length, "Overflow checking");
2980 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2981 for (int i = 0; i < length; i++) {
2982 sde[i] = sde_buffer[i];
2983 }
2984 sde[length] = '\0';
2985 set_class_sde_buffer((const char*)sde, length);
2986 }
2987 // Got utf8 string, set stream position forward
2988 cfs->skip_u1(length, CHECK);
2989 }
2990
2991
2992 // Inner classes can be static, private or protected (classic VM does this)
2993 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
2994 JVM_ACC_PRIVATE | \
2995 JVM_ACC_PROTECTED | \
2996 JVM_ACC_STATIC \
2997 )
2998
2999 // Return number of classes in the inner classes attribute table
3000 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3001 const u1* const inner_classes_attribute_start,
3002 bool parsed_enclosingmethod_attribute,
3003 u2 enclosing_method_class_index,
3004 u2 enclosing_method_method_index,
3005 TRAPS) {
3006 const u1* const current_mark = cfs->current();
3007 u2 length = 0;
3008 if (inner_classes_attribute_start != NULL) {
3009 cfs->set_current(inner_classes_attribute_start);
3010 cfs->guarantee_more(2, CHECK_0); // length
3011 length = cfs->get_u2_fast();
3012 }
3013
3014 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3015 // method data:
3016 // [inner_class_info_index,
3017 // outer_class_info_index,
3018 // inner_name_index,
3019 // inner_class_access_flags,
3020 // ...
3021 // enclosing_method_class_index,
3022 // enclosing_method_method_index]
3023 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3024 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3025 _inner_classes = inner_classes;
3026
3027 int index = 0;
3028 const int cp_size = _cp->length();
3029 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3030 for (int n = 0; n < length; n++) {
3031 // Inner class index
3032 const u2 inner_class_info_index = cfs->get_u2_fast();
3033 check_property(
3034 valid_klass_reference_at(inner_class_info_index),
3035 "inner_class_info_index %u has bad constant type in class file %s",
3036 inner_class_info_index, CHECK_0);
3037 // Outer class index
3038 const u2 outer_class_info_index = cfs->get_u2_fast();
3039 check_property(
3040 outer_class_info_index == 0 ||
3041 valid_klass_reference_at(outer_class_info_index),
3042 "outer_class_info_index %u has bad constant type in class file %s",
3043 outer_class_info_index, CHECK_0);
3044 // Inner class name
3045 const u2 inner_name_index = cfs->get_u2_fast();
3046 check_property(
3047 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3048 "inner_name_index %u has bad constant type in class file %s",
3049 inner_name_index, CHECK_0);
3050 if (_need_verify) {
3051 guarantee_property(inner_class_info_index != outer_class_info_index,
3052 "Class is both outer and inner class in class file %s", CHECK_0);
3053 }
3054 // Access flags
3055 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3056 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3057 // Set abstract bit for old class files for backward compatibility
3058 flags |= JVM_ACC_ABSTRACT;
3059 }
3060 verify_legal_class_modifiers(flags, CHECK_0);
3061 AccessFlags inner_access_flags(flags);
3062
3063 inner_classes->at_put(index++, inner_class_info_index);
3064 inner_classes->at_put(index++, outer_class_info_index);
3065 inner_classes->at_put(index++, inner_name_index);
3066 inner_classes->at_put(index++, inner_access_flags.as_short());
3067 }
3068
3069 // 4347400: make sure there's no duplicate entry in the classes array
3070 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3071 for(int i = 0; i < length * 4; i += 4) {
3072 for(int j = i + 4; j < length * 4; j += 4) {
3073 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3074 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3075 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3076 inner_classes->at(i+3) != inner_classes->at(j+3)),
3077 "Duplicate entry in InnerClasses in class file %s",
3078 CHECK_0);
3079 }
3080 }
3081 }
3082
3083 // Set EnclosingMethod class and method indexes.
3084 if (parsed_enclosingmethod_attribute) {
3085 inner_classes->at_put(index++, enclosing_method_class_index);
3086 inner_classes->at_put(index++, enclosing_method_method_index);
3087 }
3088 assert(index == size, "wrong size");
3089
3090 // Restore buffer's current position.
3091 cfs->set_current(current_mark);
3092
3093 return length;
3094 }
3095
3096 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3097 set_class_synthetic_flag(true);
3098 }
3099
3100 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3101 assert(cfs != NULL, "invariant");
3102
3103 const u2 signature_index = cfs->get_u2(CHECK);
3104 check_property(
3105 valid_symbol_at(signature_index),
3106 "Invalid constant pool index %u in Signature attribute in class file %s",
3107 signature_index, CHECK);
3108 set_class_generic_signature_index(signature_index);
3109 }
3110
3111 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3112 ConstantPool* cp,
3113 u4 attribute_byte_length,
3114 TRAPS) {
3115 assert(cfs != NULL, "invariant");
3116 assert(cp != NULL, "invariant");
3117
3118 const u1* const current_start = cfs->current();
3119
3120 guarantee_property(attribute_byte_length >= sizeof(u2),
3121 "Invalid BootstrapMethods attribute length %u in class file %s",
3122 attribute_byte_length,
3123 CHECK);
3124
3125 cfs->guarantee_more(attribute_byte_length, CHECK);
3126
3127 const int attribute_array_length = cfs->get_u2_fast();
3128
3129 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3130 "Short length on BootstrapMethods in class file %s",
3131 CHECK);
3132
3133
3134 // The attribute contains a counted array of counted tuples of shorts,
3135 // represending bootstrap specifiers:
3136 // length*{bootstrap_method_index, argument_count*{argument_index}}
3137 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3138 // operand_count = number of shorts in attr, except for leading length
3139
3140 // The attribute is copied into a short[] array.
3141 // The array begins with a series of short[2] pairs, one for each tuple.
3142 const int index_size = (attribute_array_length * 2);
3143
3144 Array<u2>* const operands =
3145 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3146
3147 // Eagerly assign operands so they will be deallocated with the constant
3148 // pool if there is an error.
3149 cp->set_operands(operands);
3150
3151 int operand_fill_index = index_size;
3152 const int cp_size = cp->length();
3153
3154 for (int n = 0; n < attribute_array_length; n++) {
3155 // Store a 32-bit offset into the header of the operand array.
3156 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3157
3158 // Read a bootstrap specifier.
3159 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3160 const u2 bootstrap_method_index = cfs->get_u2_fast();
3161 const u2 argument_count = cfs->get_u2_fast();
3162 check_property(
3163 valid_cp_range(bootstrap_method_index, cp_size) &&
3164 cp->tag_at(bootstrap_method_index).is_method_handle(),
3165 "bootstrap_method_index %u has bad constant type in class file %s",
3166 bootstrap_method_index,
3167 CHECK);
3168
3169 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3170 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3171 CHECK);
3172
3173 operands->at_put(operand_fill_index++, bootstrap_method_index);
3174 operands->at_put(operand_fill_index++, argument_count);
3175
3176 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3177 for (int j = 0; j < argument_count; j++) {
3178 const u2 argument_index = cfs->get_u2_fast();
3179 check_property(
3180 valid_cp_range(argument_index, cp_size) &&
3181 cp->tag_at(argument_index).is_loadable_constant(),
3182 "argument_index %u has bad constant type in class file %s",
3183 argument_index,
3184 CHECK);
3185 operands->at_put(operand_fill_index++, argument_index);
3186 }
3187 }
3188 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3189 "Bad length on BootstrapMethods in class file %s",
3190 CHECK);
3191 }
3192
3193 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3194 ConstantPool* cp,
3195 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3196 TRAPS) {
3197 assert(cfs != NULL, "invariant");
3198 assert(cp != NULL, "invariant");
3199 assert(parsed_annotations != NULL, "invariant");
3200
3201 // Set inner classes attribute to default sentinel
3202 _inner_classes = Universe::the_empty_short_array();
3203 cfs->guarantee_more(2, CHECK); // attributes_count
3204 u2 attributes_count = cfs->get_u2_fast();
3205 bool parsed_sourcefile_attribute = false;
3206 bool parsed_innerclasses_attribute = false;
3207 bool parsed_enclosingmethod_attribute = false;
3208 bool parsed_bootstrap_methods_attribute = false;
3209 const u1* runtime_visible_annotations = NULL;
3210 int runtime_visible_annotations_length = 0;
3211 const u1* runtime_invisible_annotations = NULL;
3212 int runtime_invisible_annotations_length = 0;
3213 const u1* runtime_visible_type_annotations = NULL;
3214 int runtime_visible_type_annotations_length = 0;
3215 const u1* runtime_invisible_type_annotations = NULL;
3216 int runtime_invisible_type_annotations_length = 0;
3217 bool runtime_invisible_type_annotations_exists = false;
3218 bool runtime_invisible_annotations_exists = false;
3219 bool parsed_source_debug_ext_annotations_exist = false;
3220 const u1* inner_classes_attribute_start = NULL;
3221 u4 inner_classes_attribute_length = 0;
3222 u2 enclosing_method_class_index = 0;
3223 u2 enclosing_method_method_index = 0;
3224 // Iterate over attributes
3225 while (attributes_count--) {
3226 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3227 const u2 attribute_name_index = cfs->get_u2_fast();
3228 const u4 attribute_length = cfs->get_u4_fast();
3229 check_property(
3230 valid_symbol_at(attribute_name_index),
3231 "Attribute name has bad constant pool index %u in class file %s",
3232 attribute_name_index, CHECK);
3233 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3234 if (tag == vmSymbols::tag_source_file()) {
3235 // Check for SourceFile tag
3236 if (_need_verify) {
3237 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3238 }
3239 if (parsed_sourcefile_attribute) {
3240 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3241 } else {
3242 parsed_sourcefile_attribute = true;
3243 }
3244 parse_classfile_sourcefile_attribute(cfs, CHECK);
3245 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3246 // Check for SourceDebugExtension tag
3247 if (parsed_source_debug_ext_annotations_exist) {
3248 classfile_parse_error(
3249 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3250 }
3251 parsed_source_debug_ext_annotations_exist = true;
3252 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3253 } else if (tag == vmSymbols::tag_inner_classes()) {
3254 // Check for InnerClasses tag
3255 if (parsed_innerclasses_attribute) {
3256 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3257 } else {
3258 parsed_innerclasses_attribute = true;
3259 }
3260 inner_classes_attribute_start = cfs->get_u1_buffer();
3261 inner_classes_attribute_length = attribute_length;
3262 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3263 } else if (tag == vmSymbols::tag_synthetic()) {
3264 // Check for Synthetic tag
3265 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3266 if (attribute_length != 0) {
3267 classfile_parse_error(
3268 "Invalid Synthetic classfile attribute length %u in class file %s",
3269 attribute_length, CHECK);
3270 }
3271 parse_classfile_synthetic_attribute(CHECK);
3272 } else if (tag == vmSymbols::tag_deprecated()) {
3273 // Check for Deprecatd tag - 4276120
3274 if (attribute_length != 0) {
3275 classfile_parse_error(
3276 "Invalid Deprecated classfile attribute length %u in class file %s",
3277 attribute_length, CHECK);
3278 }
3279 } else if (_major_version >= JAVA_1_5_VERSION) {
3280 if (tag == vmSymbols::tag_signature()) {
3281 if (attribute_length != 2) {
3282 classfile_parse_error(
3283 "Wrong Signature attribute length %u in class file %s",
3284 attribute_length, CHECK);
3285 }
3286 parse_classfile_signature_attribute(cfs, CHECK);
3287 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3288 if (runtime_visible_annotations != NULL) {
3289 classfile_parse_error(
3290 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3291 }
3292 runtime_visible_annotations_length = attribute_length;
3293 runtime_visible_annotations = cfs->get_u1_buffer();
3294 assert(runtime_visible_annotations != NULL, "null visible annotations");
3295 parse_annotations(cp,
3296 runtime_visible_annotations,
3297 runtime_visible_annotations_length,
3298 parsed_annotations,
3299 _loader_data,
3300 CHECK);
3301 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
3302 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3303 if (runtime_invisible_annotations_exists) {
3304 classfile_parse_error(
3305 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3306 }
3307 runtime_invisible_annotations_exists = true;
3308 if (PreserveAllAnnotations) {
3309 runtime_invisible_annotations_length = attribute_length;
3310 runtime_invisible_annotations = cfs->get_u1_buffer();
3311 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3312 }
3313 cfs->skip_u1(attribute_length, CHECK);
3314 } else if (tag == vmSymbols::tag_enclosing_method()) {
3315 if (parsed_enclosingmethod_attribute) {
3316 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3317 } else {
3318 parsed_enclosingmethod_attribute = true;
3319 }
3320 guarantee_property(attribute_length == 4,
3321 "Wrong EnclosingMethod attribute length %u in class file %s",
3322 attribute_length, CHECK);
3323 cfs->guarantee_more(4, CHECK); // class_index, method_index
3324 enclosing_method_class_index = cfs->get_u2_fast();
3325 enclosing_method_method_index = cfs->get_u2_fast();
3326 if (enclosing_method_class_index == 0) {
3327 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3328 }
3329 // Validate the constant pool indices and types
3330 check_property(valid_klass_reference_at(enclosing_method_class_index),
3331 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3332 if (enclosing_method_method_index != 0 &&
3333 (!cp->is_within_bounds(enclosing_method_method_index) ||
3334 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3335 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3336 }
3337 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3338 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3339 if (parsed_bootstrap_methods_attribute)
3340 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3341 parsed_bootstrap_methods_attribute = true;
3342 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3343 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3344 if (runtime_visible_type_annotations != NULL) {
3345 classfile_parse_error(
3346 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3347 }
3348 runtime_visible_type_annotations_length = attribute_length;
3349 runtime_visible_type_annotations = cfs->get_u1_buffer();
3350 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3351 // No need for the VM to parse Type annotations
3352 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3353 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3354 if (runtime_invisible_type_annotations_exists) {
3355 classfile_parse_error(
3356 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3357 } else {
3358 runtime_invisible_type_annotations_exists = true;
3359 }
3360 if (PreserveAllAnnotations) {
3361 runtime_invisible_type_annotations_length = attribute_length;
3362 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3363 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3364 }
3365 cfs->skip_u1(attribute_length, CHECK);
3366 } else {
3367 // Unknown attribute
3368 cfs->skip_u1(attribute_length, CHECK);
3369 }
3370 } else {
3371 // Unknown attribute
3372 cfs->skip_u1(attribute_length, CHECK);
3373 }
3374 }
3375 _annotations = assemble_annotations(runtime_visible_annotations,
3376 runtime_visible_annotations_length,
3377 runtime_invisible_annotations,
3378 runtime_invisible_annotations_length,
3379 CHECK);
3380 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3381 runtime_visible_type_annotations_length,
3382 runtime_invisible_type_annotations,
3383 runtime_invisible_type_annotations_length,
3384 CHECK);
3385
3386 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3387 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3388 cfs,
3389 inner_classes_attribute_start,
3390 parsed_innerclasses_attribute,
3391 enclosing_method_class_index,
3392 enclosing_method_method_index,
3393 CHECK);
3394 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3395 guarantee_property(
3396 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3397 "Wrong InnerClasses attribute length in class file %s", CHECK);
3398 }
3399 }
3400
3401 if (_max_bootstrap_specifier_index >= 0) {
3402 guarantee_property(parsed_bootstrap_methods_attribute,
3403 "Missing BootstrapMethods attribute in class file %s", CHECK);
3404 }
3405 }
3406
3407 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3408 assert(k != NULL, "invariant");
3409
3410 if (_synthetic_flag)
3411 k->set_is_synthetic();
3412 if (_sourcefile_index != 0) {
3413 k->set_source_file_name_index(_sourcefile_index);
3414 }
3415 if (_generic_signature_index != 0) {
3416 k->set_generic_signature_index(_generic_signature_index);
3417 }
3418 if (_sde_buffer != NULL) {
3419 k->set_source_debug_extension(_sde_buffer, _sde_length);
3420 }
3421 }
3422
3423 // Create the Annotations object that will
3424 // hold the annotations array for the Klass.
3425 void ClassFileParser::create_combined_annotations(TRAPS) {
3426 if (_annotations == NULL &&
3427 _type_annotations == NULL &&
3428 _fields_annotations == NULL &&
3429 _fields_type_annotations == NULL) {
3430 // Don't create the Annotations object unnecessarily.
3431 return;
3432 }
3433
3434 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3435 annotations->set_class_annotations(_annotations);
3436 annotations->set_class_type_annotations(_type_annotations);
3437 annotations->set_fields_annotations(_fields_annotations);
3438 annotations->set_fields_type_annotations(_fields_type_annotations);
3439
3440 // This is the Annotations object that will be
3441 // assigned to InstanceKlass being constructed.
3442 _combined_annotations = annotations;
3443
3444 // The annotations arrays below has been transfered the
3445 // _combined_annotations so these fields can now be cleared.
3446 _annotations = NULL;
3447 _type_annotations = NULL;
3448 _fields_annotations = NULL;
3449 _fields_type_annotations = NULL;
3450 }
3451
3452 // Transfer ownership of metadata allocated to the InstanceKlass.
3453 void ClassFileParser::apply_parsed_class_metadata(
3454 InstanceKlass* this_klass,
3455 int java_fields_count, TRAPS) {
3456 assert(this_klass != NULL, "invariant");
3457
3458 _cp->set_pool_holder(this_klass);
3459 this_klass->set_constants(_cp);
3460 this_klass->set_fields(_fields, java_fields_count);
3461 this_klass->set_methods(_methods);
3462 this_klass->set_inner_classes(_inner_classes);
3463 this_klass->set_local_interfaces(_local_interfaces);
3464 this_klass->set_transitive_interfaces(_transitive_interfaces);
3465 this_klass->set_annotations(_combined_annotations);
3466
3467 // Clear out these fields so they don't get deallocated by the destructor
3468 clear_class_metadata();
3469 }
3470
3471 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3472 int runtime_visible_annotations_length,
3473 const u1* const runtime_invisible_annotations,
3474 int runtime_invisible_annotations_length,
3475 TRAPS) {
3476 AnnotationArray* annotations = NULL;
3477 if (runtime_visible_annotations != NULL ||
3478 runtime_invisible_annotations != NULL) {
3479 annotations = MetadataFactory::new_array<u1>(_loader_data,
3480 runtime_visible_annotations_length +
3481 runtime_invisible_annotations_length,
3482 CHECK_(annotations));
3483 if (runtime_visible_annotations != NULL) {
3484 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3485 annotations->at_put(i, runtime_visible_annotations[i]);
3486 }
3487 }
3488 if (runtime_invisible_annotations != NULL) {
3489 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3490 int append = runtime_visible_annotations_length+i;
3491 annotations->at_put(append, runtime_invisible_annotations[i]);
3492 }
3493 }
3494 }
3495 return annotations;
3496 }
3497
3498 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3499 const int super_class_index,
3500 const bool need_verify,
3501 TRAPS) {
3502 assert(cp != NULL, "invariant");
3503 const InstanceKlass* super_klass = NULL;
3504
3505 if (super_class_index == 0) {
3506 check_property(_class_name == vmSymbols::java_lang_Object(),
3507 "Invalid superclass index %u in class file %s",
3508 super_class_index,
3509 CHECK_NULL);
3510 } else {
3511 check_property(valid_klass_reference_at(super_class_index),
3512 "Invalid superclass index %u in class file %s",
3513 super_class_index,
3514 CHECK_NULL);
3515 // The class name should be legal because it is checked when parsing constant pool.
3516 // However, make sure it is not an array type.
3517 bool is_array = false;
3518 if (cp->tag_at(super_class_index).is_klass()) {
3519 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3520 if (need_verify)
3521 is_array = super_klass->is_array_klass();
3522 } else if (need_verify) {
3523 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3524 }
3525 if (need_verify) {
3526 guarantee_property(!is_array,
3527 "Bad superclass name in class file %s", CHECK_NULL);
3528 }
3529 }
3530 return super_klass;
3531 }
3532
3533 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3534 unsigned int nonstatic_oop_map_count,
3535 int first_nonstatic_oop_offset) {
3536
3537 unsigned int map_count =
3538 NULL == super ? 0 : super->nonstatic_oop_map_count();
3539 if (nonstatic_oop_map_count > 0) {
3540 // We have oops to add to map
3541 if (map_count == 0) {
3542 map_count = nonstatic_oop_map_count;
3543 }
3544 else {
3545 // Check whether we should add a new map block or whether the last one can
3546 // be extended
3547 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3548 const OopMapBlock* const last_map = first_map + map_count - 1;
3549
3550 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3551 if (next_offset == first_nonstatic_oop_offset) {
3552 // There is no gap bettwen superklass's last oop field and first
3553 // local oop field, merge maps.
3554 nonstatic_oop_map_count -= 1;
3555 }
3556 else {
3557 // Superklass didn't end with a oop field, add extra maps
3558 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3559 }
3560 map_count += nonstatic_oop_map_count;
3561 }
3562 }
3563 return map_count;
3564 }
3565
3566 #ifndef PRODUCT
3567 static void print_field_layout(const Symbol* name,
3568 Array<u2>* fields,
3569 constantPoolHandle cp,
3570 int instance_size,
3571 int instance_fields_start,
3572 int instance_fields_end,
3573 int static_fields_end) {
3574
3575 assert(name != NULL, "invariant");
3576
3577 tty->print("%s: field layout\n", name->as_klass_external_name());
3578 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3579 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3580 if (!fs.access_flags().is_static()) {
3581 tty->print(" @%3d \"%s\" %s\n",
3582 fs.offset(),
3583 fs.name()->as_klass_external_name(),
3584 fs.signature()->as_klass_external_name());
3585 }
3586 }
3587 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3588 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3589 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3590 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3591 if (fs.access_flags().is_static()) {
3592 tty->print(" @%3d \"%s\" %s\n",
3593 fs.offset(),
3594 fs.name()->as_klass_external_name(),
3595 fs.signature()->as_klass_external_name());
3596 }
3597 }
3598 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3599 tty->print("\n");
3600 }
3601 #endif
3602
3603 // Values needed for oopmap and InstanceKlass creation
3604 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3605 public:
3606 int* nonstatic_oop_offsets;
3607 unsigned int* nonstatic_oop_counts;
3608 unsigned int nonstatic_oop_map_count;
3609 unsigned int total_oop_map_count;
3610 int instance_size;
3611 int nonstatic_field_size;
3612 int static_field_size;
3613 bool has_nonstatic_fields;
3614 };
3615
3616 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3617 void ClassFileParser::layout_fields(ConstantPool* cp,
3618 const FieldAllocationCount* fac,
3619 const ClassAnnotationCollector* parsed_annotations,
3620 FieldLayoutInfo* info,
3621 TRAPS) {
3622
3623 assert(cp != NULL, "invariant");
3624
3625 // Field size and offset computation
3626 int nonstatic_field_size = _super_klass == NULL ? 0 :
3627 _super_klass->nonstatic_field_size();
3628
3629 // Count the contended fields by type.
3630 //
3631 // We ignore static fields, because @Contended is not supported for them.
3632 // The layout code below will also ignore the static fields.
3633 int nonstatic_contended_count = 0;
3634 FieldAllocationCount fac_contended;
3635 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3636 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3637 if (fs.is_contended()) {
3638 fac_contended.count[atype]++;
3639 if (!fs.access_flags().is_static()) {
3640 nonstatic_contended_count++;
3641 }
3642 }
3643 }
3644
3645
3646 // Calculate the starting byte offsets
3647 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3648 int next_static_double_offset = next_static_oop_offset +
3649 ((fac->count[STATIC_OOP]) * heapOopSize);
3650 if ( fac->count[STATIC_DOUBLE] &&
3651 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3652 Universe::field_type_should_be_aligned(T_LONG)) ) {
3653 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3654 }
3655
3656 int next_static_word_offset = next_static_double_offset +
3657 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3658 int next_static_short_offset = next_static_word_offset +
3659 ((fac->count[STATIC_WORD]) * BytesPerInt);
3660 int next_static_byte_offset = next_static_short_offset +
3661 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3662
3663 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3664 nonstatic_field_size * heapOopSize;
3665
3666 int next_nonstatic_field_offset = nonstatic_fields_start;
3667
3668 const bool is_contended_class = parsed_annotations->is_contended();
3669
3670 // Class is contended, pad before all the fields
3671 if (is_contended_class) {
3672 next_nonstatic_field_offset += ContendedPaddingWidth;
3673 }
3674
3675 // Compute the non-contended fields count.
3676 // The packing code below relies on these counts to determine if some field
3677 // can be squeezed into the alignment gap. Contended fields are obviously
3678 // exempt from that.
3679 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3680 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3681 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3682 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3683 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3684
3685 // Total non-static fields count, including every contended field
3686 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3687 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3688 fac->count[NONSTATIC_OOP];
3689
3690 const bool super_has_nonstatic_fields =
3691 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3692 const bool has_nonstatic_fields =
3693 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3694
3695
3696 // Prepare list of oops for oop map generation.
3697 //
3698 // "offset" and "count" lists are describing the set of contiguous oop
3699 // regions. offset[i] is the start of the i-th region, which then has
3700 // count[i] oops following. Before we know how many regions are required,
3701 // we pessimistically allocate the maps to fit all the oops into the
3702 // distinct regions.
3703 //
3704 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3705 // to figure out if we still need to do this.
3706 unsigned int nonstatic_oop_map_count = 0;
3707 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3708
3709 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3710 THREAD, int, max_nonstatic_oop_maps);
3711 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3712 THREAD, unsigned int, max_nonstatic_oop_maps);
3713
3714 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3715
3716 bool compact_fields = CompactFields;
3717 int allocation_style = FieldsAllocationStyle;
3718 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3719 assert(false, "0 <= FieldsAllocationStyle <= 2");
3720 allocation_style = 1; // Optimistic
3721 }
3722
3723 // The next classes have predefined hard-coded fields offsets
3724 // (see in JavaClasses::compute_hard_coded_offsets()).
3725 // Use default fields allocation order for them.
3726 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3727 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3728 _class_name == vmSymbols::java_lang_Class() ||
3729 _class_name == vmSymbols::java_lang_ClassLoader() ||
3730 _class_name == vmSymbols::java_lang_ref_Reference() ||
3731 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3732 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3733 _class_name == vmSymbols::java_lang_String() ||
3734 _class_name == vmSymbols::java_lang_Throwable() ||
3735 _class_name == vmSymbols::java_lang_Boolean() ||
3736 _class_name == vmSymbols::java_lang_Character() ||
3737 _class_name == vmSymbols::java_lang_Float() ||
3738 _class_name == vmSymbols::java_lang_Double() ||
3739 _class_name == vmSymbols::java_lang_Byte() ||
3740 _class_name == vmSymbols::java_lang_Short() ||
3741 _class_name == vmSymbols::java_lang_Integer() ||
3742 _class_name == vmSymbols::java_lang_Long())) {
3743 allocation_style = 0; // Allocate oops first
3744 compact_fields = false; // Don't compact fields
3745 }
3746
3747 int next_nonstatic_oop_offset = 0;
3748 int next_nonstatic_double_offset = 0;
3749
3750 // Rearrange fields for a given allocation style
3751 if( allocation_style == 0 ) {
3752 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3753 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3754 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3755 (nonstatic_oop_count * heapOopSize);
3756 } else if( allocation_style == 1 ) {
3757 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3758 next_nonstatic_double_offset = next_nonstatic_field_offset;
3759 } else if( allocation_style == 2 ) {
3760 // Fields allocation: oops fields in super and sub classes are together.
3761 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3762 _super_klass->nonstatic_oop_map_size() > 0 ) {
3763 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3764 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3765 const OopMapBlock* const last_map = first_map + map_count - 1;
3766 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3767 if (next_offset == next_nonstatic_field_offset) {
3768 allocation_style = 0; // allocate oops first
3769 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3770 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3771 (nonstatic_oop_count * heapOopSize);
3772 }
3773 }
3774 if( allocation_style == 2 ) {
3775 allocation_style = 1; // allocate oops last
3776 next_nonstatic_double_offset = next_nonstatic_field_offset;
3777 }
3778 } else {
3779 ShouldNotReachHere();
3780 }
3781
3782 int nonstatic_oop_space_count = 0;
3783 int nonstatic_word_space_count = 0;
3784 int nonstatic_short_space_count = 0;
3785 int nonstatic_byte_space_count = 0;
3786 int nonstatic_oop_space_offset = 0;
3787 int nonstatic_word_space_offset = 0;
3788 int nonstatic_short_space_offset = 0;
3789 int nonstatic_byte_space_offset = 0;
3790
3791 // Try to squeeze some of the fields into the gaps due to
3792 // long/double alignment.
3793 if (nonstatic_double_count > 0) {
3794 int offset = next_nonstatic_double_offset;
3795 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3796 if (compact_fields && offset != next_nonstatic_double_offset) {
3797 // Allocate available fields into the gap before double field.
3798 int length = next_nonstatic_double_offset - offset;
3799 assert(length == BytesPerInt, "");
3800 nonstatic_word_space_offset = offset;
3801 if (nonstatic_word_count > 0) {
3802 nonstatic_word_count -= 1;
3803 nonstatic_word_space_count = 1; // Only one will fit
3804 length -= BytesPerInt;
3805 offset += BytesPerInt;
3806 }
3807 nonstatic_short_space_offset = offset;
3808 while (length >= BytesPerShort && nonstatic_short_count > 0) {
3809 nonstatic_short_count -= 1;
3810 nonstatic_short_space_count += 1;
3811 length -= BytesPerShort;
3812 offset += BytesPerShort;
3813 }
3814 nonstatic_byte_space_offset = offset;
3815 while (length > 0 && nonstatic_byte_count > 0) {
3816 nonstatic_byte_count -= 1;
3817 nonstatic_byte_space_count += 1;
3818 length -= 1;
3819 }
3820 // Allocate oop field in the gap if there are no other fields for that.
3821 nonstatic_oop_space_offset = offset;
3822 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3823 allocation_style != 0) { // when oop fields not first
3824 nonstatic_oop_count -= 1;
3825 nonstatic_oop_space_count = 1; // Only one will fit
3826 length -= heapOopSize;
3827 offset += heapOopSize;
3828 }
3829 }
3830 }
3831
3832 int next_nonstatic_word_offset = next_nonstatic_double_offset +
3833 (nonstatic_double_count * BytesPerLong);
3834 int next_nonstatic_short_offset = next_nonstatic_word_offset +
3835 (nonstatic_word_count * BytesPerInt);
3836 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3837 (nonstatic_short_count * BytesPerShort);
3838 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3839 nonstatic_byte_count;
3840
3841 // let oops jump before padding with this allocation style
3842 if( allocation_style == 1 ) {
3843 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3844 if( nonstatic_oop_count > 0 ) {
3845 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3846 }
3847 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3848 }
3849
3850 // Iterate over fields again and compute correct offsets.
3851 // The field allocation type was temporarily stored in the offset slot.
3852 // oop fields are located before non-oop fields (static and non-static).
3853 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3854
3855 // skip already laid out fields
3856 if (fs.is_offset_set()) continue;
3857
3858 // contended instance fields are handled below
3859 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3860
3861 int real_offset = 0;
3862 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3863
3864 // pack the rest of the fields
3865 switch (atype) {
3866 case STATIC_OOP:
3867 real_offset = next_static_oop_offset;
3868 next_static_oop_offset += heapOopSize;
3869 break;
3870 case STATIC_BYTE:
3871 real_offset = next_static_byte_offset;
3872 next_static_byte_offset += 1;
3873 break;
3874 case STATIC_SHORT:
3875 real_offset = next_static_short_offset;
3876 next_static_short_offset += BytesPerShort;
3877 break;
3878 case STATIC_WORD:
3879 real_offset = next_static_word_offset;
3880 next_static_word_offset += BytesPerInt;
3881 break;
3882 case STATIC_DOUBLE:
3883 real_offset = next_static_double_offset;
3884 next_static_double_offset += BytesPerLong;
3885 break;
3886 case NONSTATIC_OOP:
3887 if( nonstatic_oop_space_count > 0 ) {
3888 real_offset = nonstatic_oop_space_offset;
3889 nonstatic_oop_space_offset += heapOopSize;
3890 nonstatic_oop_space_count -= 1;
3891 } else {
3892 real_offset = next_nonstatic_oop_offset;
3893 next_nonstatic_oop_offset += heapOopSize;
3894 }
3895
3896 // Record this oop in the oop maps
3897 if( nonstatic_oop_map_count > 0 &&
3898 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3899 real_offset -
3900 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3901 heapOopSize ) {
3902 // This oop is adjacent to the previous one, add to current oop map
3903 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3904 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3905 } else {
3906 // This oop is not adjacent to the previous one, create new oop map
3907 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3908 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3909 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3910 nonstatic_oop_map_count += 1;
3911 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3912 first_nonstatic_oop_offset = real_offset;
3913 }
3914 }
3915 break;
3916 case NONSTATIC_BYTE:
3917 if( nonstatic_byte_space_count > 0 ) {
3918 real_offset = nonstatic_byte_space_offset;
3919 nonstatic_byte_space_offset += 1;
3920 nonstatic_byte_space_count -= 1;
3921 } else {
3922 real_offset = next_nonstatic_byte_offset;
3923 next_nonstatic_byte_offset += 1;
3924 }
3925 break;
3926 case NONSTATIC_SHORT:
3927 if( nonstatic_short_space_count > 0 ) {
3928 real_offset = nonstatic_short_space_offset;
3929 nonstatic_short_space_offset += BytesPerShort;
3930 nonstatic_short_space_count -= 1;
3931 } else {
3932 real_offset = next_nonstatic_short_offset;
3933 next_nonstatic_short_offset += BytesPerShort;
3934 }
3935 break;
3936 case NONSTATIC_WORD:
3937 if( nonstatic_word_space_count > 0 ) {
3938 real_offset = nonstatic_word_space_offset;
3939 nonstatic_word_space_offset += BytesPerInt;
3940 nonstatic_word_space_count -= 1;
3941 } else {
3942 real_offset = next_nonstatic_word_offset;
3943 next_nonstatic_word_offset += BytesPerInt;
3944 }
3945 break;
3946 case NONSTATIC_DOUBLE:
3947 real_offset = next_nonstatic_double_offset;
3948 next_nonstatic_double_offset += BytesPerLong;
3949 break;
3950 default:
3951 ShouldNotReachHere();
3952 }
3953 fs.set_offset(real_offset);
3954 }
3955
3956
3957 // Handle the contended cases.
3958 //
3959 // Each contended field should not intersect the cache line with another contended field.
3960 // In the absence of alignment information, we end up with pessimistically separating
3961 // the fields with full-width padding.
3962 //
3963 // Additionally, this should not break alignment for the fields, so we round the alignment up
3964 // for each field.
3965 if (nonstatic_contended_count > 0) {
3966
3967 // if there is at least one contended field, we need to have pre-padding for them
3968 next_nonstatic_padded_offset += ContendedPaddingWidth;
3969
3970 // collect all contended groups
3971 BitMap bm(cp->size());
3972 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3973 // skip already laid out fields
3974 if (fs.is_offset_set()) continue;
3975
3976 if (fs.is_contended()) {
3977 bm.set_bit(fs.contended_group());
3978 }
3979 }
3980
3981 int current_group = -1;
3982 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3983
3984 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3985
3986 // skip already laid out fields
3987 if (fs.is_offset_set()) continue;
3988
3989 // skip non-contended fields and fields from different group
3990 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3991
3992 // handle statics below
3993 if (fs.access_flags().is_static()) continue;
3994
3995 int real_offset = 0;
3996 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3997
3998 switch (atype) {
3999 case NONSTATIC_BYTE:
4000 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
4001 real_offset = next_nonstatic_padded_offset;
4002 next_nonstatic_padded_offset += 1;
4003 break;
4004
4005 case NONSTATIC_SHORT:
4006 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
4007 real_offset = next_nonstatic_padded_offset;
4008 next_nonstatic_padded_offset += BytesPerShort;
4009 break;
4010
4011 case NONSTATIC_WORD:
4012 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4013 real_offset = next_nonstatic_padded_offset;
4014 next_nonstatic_padded_offset += BytesPerInt;
4015 break;
4016
4017 case NONSTATIC_DOUBLE:
4018 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4019 real_offset = next_nonstatic_padded_offset;
4020 next_nonstatic_padded_offset += BytesPerLong;
4021 break;
4022
4023 case NONSTATIC_OOP:
4024 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4025 real_offset = next_nonstatic_padded_offset;
4026 next_nonstatic_padded_offset += heapOopSize;
4027
4028 // Record this oop in the oop maps
4029 if( nonstatic_oop_map_count > 0 &&
4030 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4031 real_offset -
4032 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4033 heapOopSize ) {
4034 // This oop is adjacent to the previous one, add to current oop map
4035 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4036 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4037 } else {
4038 // This oop is not adjacent to the previous one, create new oop map
4039 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4040 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4041 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4042 nonstatic_oop_map_count += 1;
4043 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4044 first_nonstatic_oop_offset = real_offset;
4045 }
4046 }
4047 break;
4048
4049 default:
4050 ShouldNotReachHere();
4051 }
4052
4053 if (fs.contended_group() == 0) {
4054 // Contended group defines the equivalence class over the fields:
4055 // the fields within the same contended group are not inter-padded.
4056 // The only exception is default group, which does not incur the
4057 // equivalence, and so requires intra-padding.
4058 next_nonstatic_padded_offset += ContendedPaddingWidth;
4059 }
4060
4061 fs.set_offset(real_offset);
4062 } // for
4063
4064 // Start laying out the next group.
4065 // Note that this will effectively pad the last group in the back;
4066 // this is expected to alleviate memory contention effects for
4067 // subclass fields and/or adjacent object.
4068 // If this was the default group, the padding is already in place.
4069 if (current_group != 0) {
4070 next_nonstatic_padded_offset += ContendedPaddingWidth;
4071 }
4072 }
4073
4074 // handle static fields
4075 }
4076
4077 // Entire class is contended, pad in the back.
4078 // This helps to alleviate memory contention effects for subclass fields
4079 // and/or adjacent object.
4080 if (is_contended_class) {
4081 next_nonstatic_padded_offset += ContendedPaddingWidth;
4082 }
4083
4084 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4085
4086 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
4087 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4088 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
4089
4090 int static_field_size = (static_fields_end -
4091 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4092 nonstatic_field_size = nonstatic_field_size +
4093 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4094
4095 int instance_size = align_object_size(instance_end / wordSize);
4096
4097 assert(instance_size == align_object_size(align_size_up(
4098 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4099 wordSize) / wordSize), "consistent layout helper value");
4100
4101 // Invariant: nonstatic_field end/start should only change if there are
4102 // nonstatic fields in the class, or if the class is contended. We compare
4103 // against the non-aligned value, so that end alignment will not fail the
4104 // assert without actually having the fields.
4105 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4106 is_contended_class ||
4107 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4108
4109 // Number of non-static oop map blocks allocated at end of klass.
4110 const unsigned int total_oop_map_count =
4111 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4112 first_nonstatic_oop_offset);
4113
4114 #ifndef PRODUCT
4115 if (PrintFieldLayout) {
4116 print_field_layout(_class_name,
4117 _fields,
4118 cp,
4119 instance_size,
4120 nonstatic_fields_start,
4121 nonstatic_fields_end,
4122 static_fields_end);
4123 }
4124
4125 #endif
4126 // Pass back information needed for InstanceKlass creation
4127 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4128 info->nonstatic_oop_counts = nonstatic_oop_counts;
4129 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4130 info->total_oop_map_count = total_oop_map_count;
4131 info->instance_size = instance_size;
4132 info->static_field_size = static_field_size;
4133 info->nonstatic_field_size = nonstatic_field_size;
4134 info->has_nonstatic_fields = has_nonstatic_fields;
4135 }
4136
4137 static void fill_oop_maps(const InstanceKlass* k,
4138 unsigned int nonstatic_oop_map_count,
4139 const int* nonstatic_oop_offsets,
4140 const unsigned int* nonstatic_oop_counts) {
4141
4142 assert(k != NULL, "invariant");
4143
4144 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4145 const InstanceKlass* const super = k->superklass();
4146 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4147 if (super_count > 0) {
4148 // Copy maps from superklass
4149 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4150 for (unsigned int i = 0; i < super_count; ++i) {
4151 *this_oop_map++ = *super_oop_map++;
4152 }
4153 }
4154
4155 if (nonstatic_oop_map_count > 0) {
4156 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4157 // The counts differ because there is no gap between superklass's last oop
4158 // field and the first local oop field. Extend the last oop map copied
4159 // from the superklass instead of creating new one.
4160 nonstatic_oop_map_count--;
4161 nonstatic_oop_offsets++;
4162 this_oop_map--;
4163 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4164 this_oop_map++;
4165 }
4166
4167 // Add new map blocks, fill them
4168 while (nonstatic_oop_map_count-- > 0) {
4169 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4170 this_oop_map->set_count(*nonstatic_oop_counts++);
4171 this_oop_map++;
4172 }
4173 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4174 this_oop_map, "sanity");
4175 }
4176 }
4177
4178
4179 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4180 assert(ik != NULL, "invariant");
4181
4182 const Klass* const super = ik->super();
4183
4184 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4185 // in which case we don't have to register objects as finalizable
4186 if (!_has_empty_finalizer) {
4187 if (_has_finalizer ||
4188 (super != NULL && super->has_finalizer())) {
4189 ik->set_has_finalizer();
4190 }
4191 }
4192
4193 #ifdef ASSERT
4194 bool f = false;
4195 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4196 vmSymbols::void_method_signature());
4197 if (m != NULL && !m->is_empty_method()) {
4198 f = true;
4199 }
4200
4201 // Spec doesn't prevent agent from redefinition of empty finalizer.
4202 // Despite the fact that it's generally bad idea and redefined finalizer
4203 // will not work as expected we shouldn't abort vm in this case
4204 if (!ik->has_redefined_this_or_super()) {
4205 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4206 }
4207 #endif
4208
4209 // Check if this klass supports the java.lang.Cloneable interface
4210 if (SystemDictionary::Cloneable_klass_loaded()) {
4211 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4212 ik->set_is_cloneable();
4213 }
4214 }
4215
4216 // Check if this klass has a vanilla default constructor
4217 if (super == NULL) {
4218 // java.lang.Object has empty default constructor
4219 ik->set_has_vanilla_constructor();
4220 } else {
4221 if (super->has_vanilla_constructor() &&
4222 _has_vanilla_constructor) {
4223 ik->set_has_vanilla_constructor();
4224 }
4225 #ifdef ASSERT
4226 bool v = false;
4227 if (super->has_vanilla_constructor()) {
4228 const Method* const constructor =
4229 ik->find_method(vmSymbols::object_initializer_name(),
4230 vmSymbols::void_method_signature());
4231 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4232 v = true;
4233 }
4234 }
4235 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4236 #endif
4237 }
4238
4239 // If it cannot be fast-path allocated, set a bit in the layout helper.
4240 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4241 assert(ik->size_helper() > 0, "layout_helper is initialized");
4242 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4243 || ik->is_abstract() || ik->is_interface()
4244 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4245 || ik->size_helper() >= FastAllocateSizeLimit) {
4246 // Forbid fast-path allocation.
4247 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4248 ik->set_layout_helper(lh);
4249 }
4250 }
4251
4252 // Attach super classes and interface classes to class loader data
4253 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4254 TRAPS) {
4255 assert(defined_klass != NULL, "invariant");
4256
4257 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4258 if (defining_loader_data->is_the_null_class_loader_data()) {
4259 // Dependencies to null class loader data are implicit.
4260 return;
4261 } else {
4262 // add super class dependency
4263 Klass* const super = defined_klass->super();
4264 if (super != NULL) {
4265 defining_loader_data->record_dependency(super, CHECK);
4266 }
4267
4268 // add super interface dependencies
4269 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4270 if (local_interfaces != NULL) {
4271 const int length = local_interfaces->length();
4272 for (int i = 0; i < length; i++) {
4273 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4274 }
4275 }
4276 }
4277 }
4278
4279 // utility methods for appending an array with check for duplicates
4280
4281 static void append_interfaces(GrowableArray<Klass*>* result,
4282 const Array<Klass*>* const ifs) {
4283 // iterate over new interfaces
4284 for (int i = 0; i < ifs->length(); i++) {
4285 Klass* const e = ifs->at(i);
4286 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4287 // add new interface
4288 result->append_if_missing(e);
4289 }
4290 }
4291
4292 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4293 Array<Klass*>* local_ifs,
4294 ClassLoaderData* loader_data,
4295 TRAPS) {
4296 assert(local_ifs != NULL, "invariant");
4297 assert(loader_data != NULL, "invariant");
4298
4299 // Compute maximum size for transitive interfaces
4300 int max_transitive_size = 0;
4301 int super_size = 0;
4302 // Add superclass transitive interfaces size
4303 if (super != NULL) {
4304 super_size = super->transitive_interfaces()->length();
4305 max_transitive_size += super_size;
4306 }
4307 // Add local interfaces' super interfaces
4308 const int local_size = local_ifs->length();
4309 for (int i = 0; i < local_size; i++) {
4310 Klass* const l = local_ifs->at(i);
4311 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4312 }
4313 // Finally add local interfaces
4314 max_transitive_size += local_size;
4315 // Construct array
4316 if (max_transitive_size == 0) {
4317 // no interfaces, use canonicalized array
4318 return Universe::the_empty_klass_array();
4319 } else if (max_transitive_size == super_size) {
4320 // no new local interfaces added, share superklass' transitive interface array
4321 return super->transitive_interfaces();
4322 } else if (max_transitive_size == local_size) {
4323 // only local interfaces added, share local interface array
4324 return local_ifs;
4325 } else {
4326 ResourceMark rm;
4327 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4328
4329 // Copy down from superclass
4330 if (super != NULL) {
4331 append_interfaces(result, super->transitive_interfaces());
4332 }
4333
4334 // Copy down from local interfaces' superinterfaces
4335 for (int i = 0; i < local_size; i++) {
4336 Klass* const l = local_ifs->at(i);
4337 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4338 }
4339 // Finally add local interfaces
4340 append_interfaces(result, local_ifs);
4341
4342 // length will be less than the max_transitive_size if duplicates were removed
4343 const int length = result->length();
4344 assert(length <= max_transitive_size, "just checking");
4345 Array<Klass*>* const new_result =
4346 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4347 for (int i = 0; i < length; i++) {
4348 Klass* const e = result->at(i);
4349 assert(e != NULL, "just checking");
4350 new_result->at_put(i, e);
4351 }
4352 return new_result;
4353 }
4354 }
4355
4356 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4357 assert(this_klass != NULL, "invariant");
4358 const Klass* const super = this_klass->super();
4359 if ((super != NULL) &&
4360 (!Reflection::verify_class_access(this_klass, super, false))) {
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 );
4369 return;
4370 }
4371 }
4372
4373
4374 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4375 assert(this_klass != NULL, "invariant");
4376 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4377 const int lng = local_interfaces->length();
4378 for (int i = lng - 1; i >= 0; i--) {
4379 Klass* const k = local_interfaces->at(i);
4380 assert (k != NULL && k->is_interface(), "invalid interface");
4381 if (!Reflection::verify_class_access(this_klass, k, false)) {
4382 ResourceMark rm(THREAD);
4383 Exceptions::fthrow(
4384 THREAD_AND_LOCATION,
4385 vmSymbols::java_lang_IllegalAccessError(),
4386 "class %s cannot access its superinterface %s",
4387 this_klass->external_name(),
4388 k->external_name()
4389 );
4390 return;
4391 }
4392 }
4393 }
4394
4395
4396 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4397 assert(this_klass != NULL, "invariant");
4398 const Array<Method*>* const methods = this_klass->methods();
4399 const int num_methods = methods->length();
4400
4401 // go thru each method and check if it overrides a final method
4402 for (int index = 0; index < num_methods; index++) {
4403 const Method* const m = methods->at(index);
4404
4405 // skip private, static, and <init> methods
4406 if ((!m->is_private() && !m->is_static()) &&
4407 (m->name() != vmSymbols::object_initializer_name())) {
4408
4409 const Symbol* const name = m->name();
4410 const Symbol* const signature = m->signature();
4411 const Klass* k = this_klass->super();
4412 const Method* super_m = NULL;
4413 while (k != NULL) {
4414 // skip supers that don't have final methods.
4415 if (k->has_final_method()) {
4416 // lookup a matching method in the super class hierarchy
4417 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4418 if (super_m == NULL) {
4419 break; // didn't find any match; get out
4420 }
4421
4422 if (super_m->is_final() && !super_m->is_static() &&
4423 // matching method in super is final, and not static
4424 (Reflection::verify_field_access(this_klass,
4425 super_m->method_holder(),
4426 super_m->method_holder(),
4427 super_m->access_flags(), false))
4428 // this class can access super final method and therefore override
4429 ) {
4430 ResourceMark rm(THREAD);
4431 Exceptions::fthrow(
4432 THREAD_AND_LOCATION,
4433 vmSymbols::java_lang_VerifyError(),
4434 "class %s overrides final method %s.%s%s",
4435 this_klass->external_name(),
4436 super_m->method_holder()->external_name(),
4437 name->as_C_string(),
4438 signature->as_C_string()
4439 );
4440 return;
4441 }
4442
4443 // continue to look from super_m's holder's super.
4444 k = super_m->method_holder()->super();
4445 continue;
4446 }
4447
4448 k = k->super();
4449 }
4450 }
4451 }
4452 }
4453
4454
4455 // assumes that this_klass is an interface
4456 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4457 assert(this_klass != NULL, "invariant");
4458 assert(this_klass->is_interface(), "not an interface");
4459 const Array<Method*>* methods = this_klass->methods();
4460 const int num_methods = methods->length();
4461
4462 for (int index = 0; index < num_methods; index++) {
4463 const Method* const m = methods->at(index);
4464 // if m is static and not the init method, throw a verify error
4465 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4466 ResourceMark rm(THREAD);
4467 Exceptions::fthrow(
4468 THREAD_AND_LOCATION,
4469 vmSymbols::java_lang_VerifyError(),
4470 "Illegal static method %s in interface %s",
4471 m->name()->as_C_string(),
4472 this_klass->external_name()
4473 );
4474 return;
4475 }
4476 }
4477 }
4478
4479 // utility methods for format checking
4480
4481 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4482 if (!_need_verify) { return; }
4483
4484 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4485 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4486 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4487 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4488 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4489 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4490 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4491
4492 if ((is_abstract && is_final) ||
4493 (is_interface && !is_abstract) ||
4494 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4495 (!is_interface && major_gte_15 && is_annotation)) {
4496 ResourceMark rm(THREAD);
4497 Exceptions::fthrow(
4498 THREAD_AND_LOCATION,
4499 vmSymbols::java_lang_ClassFormatError(),
4500 "Illegal class modifiers in class %s: 0x%X",
4501 _class_name->as_C_string(), flags
4502 );
4503 return;
4504 }
4505 }
4506
4507 static bool has_illegal_visibility(jint flags) {
4508 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4509 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4510 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4511
4512 return ((is_public && is_protected) ||
4513 (is_public && is_private) ||
4514 (is_protected && is_private));
4515 }
4516
4517 static bool is_supported_version(u2 major, u2 minor){
4518 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4519 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4520 (major <= max_version) &&
4521 ((major != max_version) ||
4522 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4523 }
4524
4525 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4526 bool is_interface,
4527 TRAPS) const {
4528 if (!_need_verify) { return; }
4529
4530 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4531 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4532 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4533 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4534 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4535 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4536 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4537 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4538 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4539
4540 bool is_illegal = false;
4541
4542 if (is_interface) {
4543 if (!is_public || !is_static || !is_final || is_private ||
4544 is_protected || is_volatile || is_transient ||
4545 (major_gte_15 && is_enum)) {
4546 is_illegal = true;
4547 }
4548 } else { // not interface
4549 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4550 is_illegal = true;
4551 }
4552 }
4553
4554 if (is_illegal) {
4555 ResourceMark rm(THREAD);
4556 Exceptions::fthrow(
4557 THREAD_AND_LOCATION,
4558 vmSymbols::java_lang_ClassFormatError(),
4559 "Illegal field modifiers in class %s: 0x%X",
4560 _class_name->as_C_string(), flags);
4561 return;
4562 }
4563 }
4564
4565 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4566 bool is_interface,
4567 const Symbol* name,
4568 TRAPS) const {
4569 if (!_need_verify) { return; }
4570
4571 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4572 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4573 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4574 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4575 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4576 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4577 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4578 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4579 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4580 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4581 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4582 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4583 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4584
4585 bool is_illegal = false;
4586
4587 if (is_interface) {
4588 if (major_gte_8) {
4589 // Class file version is JAVA_8_VERSION or later Methods of
4590 // interfaces may set any of the flags except ACC_PROTECTED,
4591 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4592 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4593 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4594 (is_native || is_protected || is_final || is_synchronized) ||
4595 // If a specific method of a class or interface has its
4596 // ACC_ABSTRACT flag set, it must not have any of its
4597 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4598 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4599 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4600 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4601 (is_abstract && (is_private || is_static || is_strict))) {
4602 is_illegal = true;
4603 }
4604 } else if (major_gte_15) {
4605 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4606 if (!is_public || is_static || is_final || is_synchronized ||
4607 is_native || !is_abstract || is_strict) {
4608 is_illegal = true;
4609 }
4610 } else {
4611 // Class file version is pre-JAVA_1_5_VERSION
4612 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4613 is_illegal = true;
4614 }
4615 }
4616 } else { // not interface
4617 if (has_illegal_visibility(flags)) {
4618 is_illegal = true;
4619 } else {
4620 if (is_initializer) {
4621 if (is_static || is_final || is_synchronized || is_native ||
4622 is_abstract || (major_gte_15 && is_bridge)) {
4623 is_illegal = true;
4624 }
4625 } else { // not initializer
4626 if (is_abstract) {
4627 if ((is_final || is_native || is_private || is_static ||
4628 (major_gte_15 && (is_synchronized || is_strict)))) {
4629 is_illegal = true;
4630 }
4631 }
4632 }
4633 }
4634 }
4635
4636 if (is_illegal) {
4637 ResourceMark rm(THREAD);
4638 Exceptions::fthrow(
4639 THREAD_AND_LOCATION,
4640 vmSymbols::java_lang_ClassFormatError(),
4641 "Method %s in class %s has illegal modifiers: 0x%X",
4642 name->as_C_string(), _class_name->as_C_string(), flags);
4643 return;
4644 }
4645 }
4646
4647 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4648 int length,
4649 TRAPS) const {
4650 assert(_need_verify, "only called when _need_verify is true");
4651 int i = 0;
4652 const int count = length >> 2;
4653 for (int k=0; k<count; k++) {
4654 unsigned char b0 = buffer[i];
4655 unsigned char b1 = buffer[i+1];
4656 unsigned char b2 = buffer[i+2];
4657 unsigned char b3 = buffer[i+3];
4658 // For an unsigned char v,
4659 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4660 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4661 const unsigned char res = b0 | b0 - 1 |
4662 b1 | b1 - 1 |
4663 b2 | b2 - 1 |
4664 b3 | b3 - 1;
4665 if (res >= 128) break;
4666 i += 4;
4667 }
4668 for(; i < length; i++) {
4669 unsigned short c;
4670 // no embedded zeros
4671 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4672 if(buffer[i] < 128) {
4673 continue;
4674 }
4675 if ((i + 5) < length) { // see if it's legal supplementary character
4676 if (UTF8::is_supplementary_character(&buffer[i])) {
4677 c = UTF8::get_supplementary_character(&buffer[i]);
4678 i += 5;
4679 continue;
4680 }
4681 }
4682 switch (buffer[i] >> 4) {
4683 default: break;
4684 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4685 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4686 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
4687 c = (buffer[i] & 0x1F) << 6;
4688 i++;
4689 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4690 c += buffer[i] & 0x3F;
4691 if (_major_version <= 47 || c == 0 || c >= 0x80) {
4692 // for classes with major > 47, c must a null or a character in its shortest form
4693 break;
4694 }
4695 }
4696 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4697 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
4698 c = (buffer[i] & 0xF) << 12;
4699 i += 2;
4700 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4701 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4702 if (_major_version <= 47 || c >= 0x800) {
4703 // for classes with major > 47, c must be in its shortest form
4704 break;
4705 }
4706 }
4707 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4708 } // end of switch
4709 } // end of for
4710 }
4711
4712 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4713 // Method names also may not contain the characters '<' or '>', unless <init>
4714 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4715 // method. Because these names have been checked as special cases before
4716 // calling this method in verify_legal_method_name.
4717 static bool verify_unqualified_name(const char* name,
4718 unsigned int length,
4719 int type) {
4720 for (const char* p = name; p != name + length;) {
4721 jchar ch = *p;
4722 if (ch < 128) {
4723 p++;
4724 if (ch == '.' || ch == ';' || ch == '[') {
4725 return false; // do not permit '.', ';', or '['
4726 }
4727 if (type != LegalClass && ch == '/') {
4728 return false; // do not permit '/' unless it's class name
4729 }
4730 if (type == LegalMethod && (ch == '<' || ch == '>')) {
4731 return false; // do not permit '<' or '>' in method names
4732 }
4733 }
4734 else {
4735 char* tmp_p = UTF8::next(p, &ch);
4736 p = tmp_p;
4737 }
4738 }
4739 return true;
4740 }
4741
4742 // Take pointer to a string. Skip over the longest part of the string that could
4743 // be taken as a fieldname. Allow '/' if slash_ok is true.
4744 // Return a pointer to just past the fieldname.
4745 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4746 // being true, we saw consecutive slashes (meaning we were looking for a
4747 // qualified path but found something that was badly-formed).
4748 static const char* skip_over_field_name(const char* name,
4749 bool slash_ok,
4750 unsigned int length) {
4751 const char* p;
4752 jboolean last_is_slash = false;
4753 jboolean not_first_ch = false;
4754
4755 for (p = name; p != name + length; not_first_ch = true) {
4756 const char* old_p = p;
4757 jchar ch = *p;
4758 if (ch < 128) {
4759 p++;
4760 // quick check for ascii
4761 if ((ch >= 'a' && ch <= 'z') ||
4762 (ch >= 'A' && ch <= 'Z') ||
4763 (ch == '_' || ch == '$') ||
4764 (not_first_ch && ch >= '0' && ch <= '9')) {
4765 last_is_slash = false;
4766 continue;
4767 }
4768 if (slash_ok && ch == '/') {
4769 if (last_is_slash) {
4770 return NULL; // Don't permit consecutive slashes
4771 }
4772 last_is_slash = true;
4773 continue;
4774 }
4775 }
4776 else {
4777 jint unicode_ch;
4778 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4779 p = tmp_p;
4780 last_is_slash = false;
4781 // Check if ch is Java identifier start or is Java identifier part
4782 // 4672820: call java.lang.Character methods directly without generating separate tables.
4783 EXCEPTION_MARK;
4784
4785 // return value
4786 JavaValue result(T_BOOLEAN);
4787 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4788 JavaCallArguments args;
4789 args.push_int(unicode_ch);
4790
4791 // public static boolean isJavaIdentifierStart(char ch);
4792 JavaCalls::call_static(&result,
4793 SystemDictionary::Character_klass(),
4794 vmSymbols::isJavaIdentifierStart_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 if (result.get_jboolean()) {
4804 continue;
4805 }
4806
4807 if (not_first_ch) {
4808 // public static boolean isJavaIdentifierPart(char ch);
4809 JavaCalls::call_static(&result,
4810 SystemDictionary::Character_klass(),
4811 vmSymbols::isJavaIdentifierPart_name(),
4812 vmSymbols::int_bool_signature(),
4813 &args,
4814 THREAD);
4815
4816 if (HAS_PENDING_EXCEPTION) {
4817 CLEAR_PENDING_EXCEPTION;
4818 return 0;
4819 }
4820
4821 if (result.get_jboolean()) {
4822 continue;
4823 }
4824 }
4825 }
4826 return (not_first_ch) ? old_p : NULL;
4827 }
4828 return (not_first_ch) ? p : NULL;
4829 }
4830
4831 // Take pointer to a string. Skip over the longest part of the string that could
4832 // be taken as a field signature. Allow "void" if void_ok.
4833 // Return a pointer to just past the signature.
4834 // Return NULL if no legal signature is found.
4835 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4836 bool void_ok,
4837 unsigned int length,
4838 TRAPS) const {
4839 unsigned int array_dim = 0;
4840 while (length > 0) {
4841 switch (signature[0]) {
4842 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4843 case JVM_SIGNATURE_BOOLEAN:
4844 case JVM_SIGNATURE_BYTE:
4845 case JVM_SIGNATURE_CHAR:
4846 case JVM_SIGNATURE_SHORT:
4847 case JVM_SIGNATURE_INT:
4848 case JVM_SIGNATURE_FLOAT:
4849 case JVM_SIGNATURE_LONG:
4850 case JVM_SIGNATURE_DOUBLE:
4851 return signature + 1;
4852 case JVM_SIGNATURE_CLASS: {
4853 if (_major_version < JAVA_1_5_VERSION) {
4854 // Skip over the class name if one is there
4855 const char* const p = skip_over_field_name(signature + 1, true, --length);
4856
4857 // The next character better be a semicolon
4858 if (p && (p - signature) > 1 && p[0] == ';') {
4859 return p + 1;
4860 }
4861 }
4862 else {
4863 // 4900761: For class version > 48, any unicode is allowed in class name.
4864 length--;
4865 signature++;
4866 while (length > 0 && signature[0] != ';') {
4867 if (signature[0] == '.') {
4868 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4869 }
4870 length--;
4871 signature++;
4872 }
4873 if (signature[0] == ';') { return signature + 1; }
4874 }
4875
4876 return NULL;
4877 }
4878 case JVM_SIGNATURE_ARRAY:
4879 array_dim++;
4880 if (array_dim > 255) {
4881 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4882 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4883 }
4884 // The rest of what's there better be a legal signature
4885 signature++;
4886 length--;
4887 void_ok = false;
4888 break;
4889
4890 default:
4891 return NULL;
4892 }
4893 }
4894 return NULL;
4895 }
4896
4897 // Checks if name is a legal class name.
4898 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4899 if (!_need_verify || _relax_verify) { return; }
4900
4901 char buf[fixed_buffer_size];
4902 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4903 unsigned int length = name->utf8_length();
4904 bool legal = false;
4905
4906 if (length > 0) {
4907 const char* p;
4908 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4909 p = skip_over_field_signature(bytes, false, length, CHECK);
4910 legal = (p != NULL) && ((p - bytes) == (int)length);
4911 } else if (_major_version < JAVA_1_5_VERSION) {
4912 if (bytes[0] != '<') {
4913 p = skip_over_field_name(bytes, true, length);
4914 legal = (p != NULL) && ((p - bytes) == (int)length);
4915 }
4916 } else {
4917 // 4900761: relax the constraints based on JSR202 spec
4918 // Class names may be drawn from the entire Unicode character set.
4919 // Identifiers between '/' must be unqualified names.
4920 // The utf8 string has been verified when parsing cpool entries.
4921 legal = verify_unqualified_name(bytes, length, LegalClass);
4922 }
4923 }
4924 if (!legal) {
4925 ResourceMark rm(THREAD);
4926 assert(_class_name != NULL, "invariant");
4927 Exceptions::fthrow(
4928 THREAD_AND_LOCATION,
4929 vmSymbols::java_lang_ClassFormatError(),
4930 "Illegal class name \"%s\" in class file %s", bytes,
4931 _class_name->as_C_string()
4932 );
4933 return;
4934 }
4935 }
4936
4937 // Checks if name is a legal field name.
4938 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4939 if (!_need_verify || _relax_verify) { return; }
4940
4941 char buf[fixed_buffer_size];
4942 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4943 unsigned int length = name->utf8_length();
4944 bool legal = false;
4945
4946 if (length > 0) {
4947 if (_major_version < JAVA_1_5_VERSION) {
4948 if (bytes[0] != '<') {
4949 const char* p = skip_over_field_name(bytes, false, length);
4950 legal = (p != NULL) && ((p - bytes) == (int)length);
4951 }
4952 } else {
4953 // 4881221: relax the constraints based on JSR202 spec
4954 legal = verify_unqualified_name(bytes, length, LegalField);
4955 }
4956 }
4957
4958 if (!legal) {
4959 ResourceMark rm(THREAD);
4960 assert(_class_name != NULL, "invariant");
4961 Exceptions::fthrow(
4962 THREAD_AND_LOCATION,
4963 vmSymbols::java_lang_ClassFormatError(),
4964 "Illegal field name \"%s\" in class %s", bytes,
4965 _class_name->as_C_string()
4966 );
4967 return;
4968 }
4969 }
4970
4971 // Checks if name is a legal method name.
4972 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4973 if (!_need_verify || _relax_verify) { return; }
4974
4975 assert(name != NULL, "method name is null");
4976 char buf[fixed_buffer_size];
4977 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4978 unsigned int length = name->utf8_length();
4979 bool legal = false;
4980
4981 if (length > 0) {
4982 if (bytes[0] == '<') {
4983 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4984 legal = true;
4985 }
4986 } else if (_major_version < JAVA_1_5_VERSION) {
4987 const char* p;
4988 p = skip_over_field_name(bytes, false, length);
4989 legal = (p != NULL) && ((p - bytes) == (int)length);
4990 } else {
4991 // 4881221: relax the constraints based on JSR202 spec
4992 legal = verify_unqualified_name(bytes, length, LegalMethod);
4993 }
4994 }
4995
4996 if (!legal) {
4997 ResourceMark rm(THREAD);
4998 assert(_class_name != NULL, "invariant");
4999 Exceptions::fthrow(
5000 THREAD_AND_LOCATION,
5001 vmSymbols::java_lang_ClassFormatError(),
5002 "Illegal method name \"%s\" in class %s", bytes,
5003 _class_name->as_C_string()
5004 );
5005 return;
5006 }
5007 }
5008
5009
5010 // Checks if signature is a legal field signature.
5011 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5012 const Symbol* signature,
5013 TRAPS) const {
5014 if (!_need_verify) { return; }
5015
5016 char buf[fixed_buffer_size];
5017 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5018 const unsigned int length = signature->utf8_length();
5019 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5020
5021 if (p == NULL || (p - bytes) != (int)length) {
5022 throwIllegalSignature("Field", name, signature, CHECK);
5023 }
5024 }
5025
5026 // Checks if signature is a legal method signature.
5027 // Returns number of parameters
5028 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5029 const Symbol* signature,
5030 TRAPS) const {
5031 if (!_need_verify) {
5032 // make sure caller's args_size will be less than 0 even for non-static
5033 // method so it will be recomputed in compute_size_of_parameters().
5034 return -2;
5035 }
5036
5037 // Class initializers cannot have args for class format version >= 51.
5038 if (name == vmSymbols::class_initializer_name() &&
5039 signature != vmSymbols::void_method_signature() &&
5040 _major_version >= JAVA_7_VERSION) {
5041 throwIllegalSignature("Method", name, signature, CHECK_0);
5042 return 0;
5043 }
5044
5045 unsigned int args_size = 0;
5046 char buf[fixed_buffer_size];
5047 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5048 unsigned int length = signature->utf8_length();
5049 const char* nextp;
5050
5051 // The first character must be a '('
5052 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5053 length--;
5054 // Skip over legal field signatures
5055 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5056 while ((length > 0) && (nextp != NULL)) {
5057 args_size++;
5058 if (p[0] == 'J' || p[0] == 'D') {
5059 args_size++;
5060 }
5061 length -= nextp - p;
5062 p = nextp;
5063 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5064 }
5065 // The first non-signature thing better be a ')'
5066 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5067 length--;
5068 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5069 // All internal methods must return void
5070 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5071 return args_size;
5072 }
5073 } else {
5074 // Now we better just have a return value
5075 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5076 if (nextp && ((int)length == (nextp - p))) {
5077 return args_size;
5078 }
5079 }
5080 }
5081 }
5082 // Report error
5083 throwIllegalSignature("Method", name, signature, CHECK_0);
5084 return 0;
5085 }
5086
5087 int ClassFileParser::static_field_size() const {
5088 assert(_field_info != NULL, "invariant");
5089 return _field_info->static_field_size;
5090 }
5091
5092 int ClassFileParser::total_oop_map_count() const {
5093 assert(_field_info != NULL, "invariant");
5094 return _field_info->total_oop_map_count;
5095 }
5096
5097 jint ClassFileParser::layout_size() const {
5098 assert(_field_info != NULL, "invariant");
5099 return _field_info->instance_size;
5100 }
5101
5102 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5103 const Array<Method*>* methods) {
5104 assert(ik != NULL, "invariant");
5105 assert(methods != NULL, "invariant");
5106
5107 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5108 // (We used to do this lazily, but now we query it in Rewriter,
5109 // which is eagerly done for every method, so we might as well do it now,
5110 // when everything is fresh in memory.)
5111 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5112
5113 if (klass_id != vmSymbols::NO_SID) {
5114 for (int j = 0; j < methods->length(); ++j) {
5115 Method* method = methods->at(j);
5116 method->init_intrinsic_id();
5117
5118 if (CheckIntrinsics) {
5119 // Check if an intrinsic is defined for method 'method',
5120 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5121 if (method->intrinsic_id() != vmIntrinsics::_none &&
5122 !method->intrinsic_candidate()) {
5123 tty->print("Compiler intrinsic is defined for method [%s], "
5124 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5125 method->name_and_sig_as_C_string(),
5126 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5127 );
5128 tty->cr();
5129 DEBUG_ONLY(vm_exit(1));
5130 }
5131 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5132 // but there is no intrinsic available for it.
5133 if (method->intrinsic_candidate() &&
5134 method->intrinsic_id() == vmIntrinsics::_none) {
5135 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5136 "but no compiler intrinsic is defined for the method.%s",
5137 method->name_and_sig_as_C_string(),
5138 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5139 );
5140 tty->cr();
5141 DEBUG_ONLY(vm_exit(1));
5142 }
5143 }
5144 } // end for
5145
5146 #ifdef ASSERT
5147 if (CheckIntrinsics) {
5148 // Check for orphan methods in the current class. A method m
5149 // of a class C is orphan if an intrinsic is defined for method m,
5150 // but class C does not declare m.
5151 // The check is potentially expensive, therefore it is available
5152 // only in debug builds.
5153
5154 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5155 if (vmIntrinsics::_compiledLambdaForm == id) {
5156 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5157 // generated for the JVM from a LambdaForm and therefore no method
5158 // is defined for it.
5159 continue;
5160 }
5161
5162 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5163 // Check if the current class contains a method with the same
5164 // name, flags, signature.
5165 bool match = false;
5166 for (int j = 0; j < methods->length(); ++j) {
5167 const Method* method = methods->at(j);
5168 if (method->intrinsic_id() == id) {
5169 match = true;
5170 break;
5171 }
5172 }
5173
5174 if (!match) {
5175 char buf[1000];
5176 tty->print("Compiler intrinsic is defined for method [%s], "
5177 "but the method is not available in class [%s].%s",
5178 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5179 buf, sizeof(buf)),
5180 ik->name()->as_C_string(),
5181 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5182 );
5183 tty->cr();
5184 DEBUG_ONLY(vm_exit(1));
5185 }
5186 }
5187 } // end for
5188 } // CheckIntrinsics
5189 #endif // ASSERT
5190 }
5191 }
5192
5193 InstanceKlass* ClassFileParser::create_instance_klass(TRAPS) {
5194 if (_klass != NULL) {
5195 return _klass;
5196 }
5197
5198 InstanceKlass* const ik =
5199 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5200
5201 fill_instance_klass(ik, CHECK_NULL);
5202
5203 assert(_klass == ik, "invariant");
5204
5205 return ik;
5206 }
5207
5208 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, TRAPS) {
5209 assert(ik != NULL, "invariant");
5210
5211 set_klass_to_deallocate(ik);
5212
5213 assert(_field_info != NULL, "invariant");
5214 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5215 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5216 "sanity");
5217
5218 assert(ik->is_instance_klass(), "sanity");
5219 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5220
5221 // Fill in information already parsed
5222 ik->set_should_verify_class(_need_verify);
5223
5224 // Not yet: supers are done below to support the new subtype-checking fields
5225 ik->set_class_loader_data(_loader_data);
5226 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5227 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5228 assert(_fac != NULL, "invariant");
5229 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5230
5231 // this transfers ownership of a lot of arrays from
5232 // the parser onto the InstanceKlass*
5233 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5234
5235 // note that is not safe to use the fields in the parser from this point on
5236 assert(NULL == _cp, "invariant");
5237 assert(NULL == _fields, "invariant");
5238 assert(NULL == _methods, "invariant");
5239 assert(NULL == _inner_classes, "invariant");
5240 assert(NULL == _local_interfaces, "invariant");
5241 assert(NULL == _transitive_interfaces, "invariant");
5242 assert(NULL == _combined_annotations, "invariant");
5243
5244 if (_has_final_method) {
5245 ik->set_has_final_method();
5246 }
5247
5248 ik->copy_method_ordering(_method_ordering, CHECK);
5249 // The InstanceKlass::_methods_jmethod_ids cache
5250 // is managed on the assumption that the initial cache
5251 // size is equal to the number of methods in the class. If
5252 // that changes, then InstanceKlass::idnum_can_increment()
5253 // has to be changed accordingly.
5254 ik->set_initial_method_idnum(ik->methods()->length());
5255
5256 ik->set_name(_class_name);
5257
5258 if (is_anonymous()) {
5259 // I am well known to myself
5260 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve
5261 }
5262
5263 ik->set_minor_version(_minor_version);
5264 ik->set_major_version(_major_version);
5265 ik->set_has_default_methods(_has_default_methods);
5266 ik->set_declares_default_methods(_declares_default_methods);
5267
5268 if (_host_klass != NULL) {
5269 assert (ik->is_anonymous(), "should be the same");
5270 ik->set_host_klass(_host_klass);
5271 }
5272
5273 const Array<Method*>* const methods = ik->methods();
5274 assert(methods != NULL, "invariant");
5275 const int methods_len = methods->length();
5276
5277 check_methods_for_intrinsics(ik, methods);
5278
5279 // Fill in field values obtained by parse_classfile_attributes
5280 if (_parsed_annotations->has_any_annotations()) {
5281 _parsed_annotations->apply_to(ik);
5282 }
5283
5284 apply_parsed_class_attributes(ik);
5285
5286 // Miranda methods
5287 if ((_num_miranda_methods > 0) ||
5288 // if this class introduced new miranda methods or
5289 (_super_klass != NULL && _super_klass->has_miranda_methods())
5290 // super class exists and this class inherited miranda methods
5291 ) {
5292 ik->set_has_miranda_methods(); // then set a flag
5293 }
5294
5295 // Fill in information needed to compute superclasses.
5296 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5297
5298 // Initialize itable offset tables
5299 klassItable::setup_itable_offset_table(ik);
5300
5301 // Compute transitive closure of interfaces this class implements
5302 // Do final class setup
5303 fill_oop_maps(ik,
5304 _field_info->nonstatic_oop_map_count,
5305 _field_info->nonstatic_oop_offsets,
5306 _field_info->nonstatic_oop_counts);
5307
5308 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5309 set_precomputed_flags(ik);
5310
5311 // check if this class can access its super class
5312 check_super_class_access(ik, CHECK);
5313
5314 // check if this class can access its superinterfaces
5315 check_super_interface_access(ik, CHECK);
5316
5317 // check if this class overrides any final method
5318 check_final_method_override(ik, CHECK);
5319
5320 // check that if this class is an interface then it doesn't have static methods
5321 if (ik->is_interface()) {
5322 /* An interface in a JAVA 8 classfile can be static */
5323 if (_major_version < JAVA_8_VERSION) {
5324 check_illegal_static_method(ik, CHECK);
5325 }
5326 }
5327
5328 // Allocate mirror and initialize static fields
5329 // The create_mirror() call will also call compute_modifiers()
5330 java_lang_Class::create_mirror(ik,
5331 _loader_data->class_loader(),
5332 _protection_domain,
5333 CHECK);
5334
5335 assert(_all_mirandas != NULL, "invariant");
5336
5337 // Generate any default methods - default methods are interface methods
5338 // that have a default implementation. This is new with Lambda project.
5339 if (_has_default_methods ) {
5340 DefaultMethods::generate_default_methods(ik,
5341 _all_mirandas,
5342 CHECK);
5343 }
5344
5345 // Update the loader_data graph.
5346 record_defined_class_dependencies(ik, CHECK);
5347
5348 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5349
5350 if (!is_internal()) {
5351 if (log_is_enabled(Info, classload)) {
5352 ik->print_loading_log(LogLevel::Info, _loader_data, _stream);
5353 }
5354 if (log_is_enabled(Debug, classload)) {
5355 ik->print_loading_log(LogLevel::Debug, _loader_data, _stream);
5356 }
5357
5358 if (log_is_enabled(Info, classresolve)) {
5359 ResourceMark rm;
5360 // print out the superclass.
5361 const char * from = ik->external_name();
5362 if (ik->java_super() != NULL) {
5363 log_info(classresolve)("%s %s (super)",
5364 from,
5365 ik->java_super()->external_name());
5366 }
5367 // print out each of the interface classes referred to by this class.
5368 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5369 if (local_interfaces != NULL) {
5370 const int length = local_interfaces->length();
5371 for (int i = 0; i < length; i++) {
5372 const Klass* const k = local_interfaces->at(i);
5373 const char * to = k->external_name();
5374 log_info(classresolve)("%s %s (interface)", from, to);
5375 }
5376 }
5377 }
5378 }
5379
5380 TRACE_INIT_ID(ik);
5381
5382 // If we reach here, all is well.
5383 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5384 // in order for it to not be destroyed in the ClassFileParser destructor.
5385 set_klass_to_deallocate(NULL);
5386
5387 // it's official
5388 set_klass(ik);
5389
5390 debug_only(ik->verify();)
5391 }
5392
5393 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5394 Symbol* name,
5395 ClassLoaderData* loader_data,
5396 Handle protection_domain,
5397 TempNewSymbol* parsed_name,
5398 const Klass* host_klass,
5399 GrowableArray<Handle>* cp_patches,
5400 Publicity pub_level,
5401 TRAPS) :
5402 _stream(stream),
5403 _requested_name(name),
5404 _loader_data(loader_data),
5405 _host_klass(host_klass),
5406 _cp_patches(cp_patches),
5407 _parsed_name(parsed_name),
5408 _super_klass(),
5409 _cp(NULL),
5410 _fields(NULL),
5411 _methods(NULL),
5412 _inner_classes(NULL),
5413 _local_interfaces(NULL),
5414 _transitive_interfaces(NULL),
5415 _combined_annotations(NULL),
5416 _annotations(NULL),
5417 _type_annotations(NULL),
5418 _fields_annotations(NULL),
5419 _fields_type_annotations(NULL),
5420 _klass(NULL),
5421 _klass_to_deallocate(NULL),
5422 _parsed_annotations(NULL),
5423 _fac(NULL),
5424 _field_info(NULL),
5425 _method_ordering(NULL),
5426 _all_mirandas(NULL),
5427 _vtable_size(0),
5428 _itable_size(0),
5429 _num_miranda_methods(0),
5430 _rt(REF_NONE),
5431 _protection_domain(protection_domain),
5432 _access_flags(),
5433 _pub_level(pub_level),
5434 _synthetic_flag(false),
5435 _sde_length(false),
5436 _sde_buffer(NULL),
5437 _sourcefile_index(0),
5438 _generic_signature_index(0),
5439 _major_version(0),
5440 _minor_version(0),
5441 _this_class_index(0),
5442 _super_class_index(0),
5443 _itfs_len(0),
5444 _java_fields_count(0),
5445 _need_verify(false),
5446 _relax_verify(false),
5447 _has_default_methods(false),
5448 _declares_default_methods(false),
5449 _has_final_method(false),
5450 _has_finalizer(false),
5451 _has_empty_finalizer(false),
5452 _has_vanilla_constructor(false),
5453 _max_bootstrap_specifier_index(-1) {
5454
5455 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5456
5457 assert(THREAD->is_Java_thread(), "invariant");
5458 assert(_loader_data != NULL, "invariant");
5459 assert(stream != NULL, "invariant");
5460 assert(_stream != NULL, "invariant");
5461 assert(_stream->buffer() == _stream->current(), "invariant");
5462 assert(_class_name != NULL, "invariant");
5463 assert(0 == _access_flags.as_int(), "invariant");
5464
5465 // Figure out whether we can skip format checking (matching classic VM behavior)
5466 if (DumpSharedSpaces) {
5467 // verify == true means it's a 'remote' class (i.e., non-boot class)
5468 // Verification decision is based on BytecodeVerificationRemote flag
5469 // for those classes.
5470 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5471 BytecodeVerificationLocal;
5472 }
5473 else {
5474 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5475 stream->need_verify());
5476 }
5477
5478 // synch back verification state to stream
5479 stream->set_verify(_need_verify);
5480
5481 // Check if verification needs to be relaxed for this class file
5482 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5483 _relax_verify = Verifier::relax_verify_for(_loader_data->class_loader());
5484
5485 parse_stream(stream, CHECK);
5486
5487 post_process_parsed_stream(stream, _cp, CHECK);
5488 }
5489
5490 void ClassFileParser::clear_class_metadata() {
5491 // metadata created before the instance klass is created. Must be
5492 // deallocated if classfile parsing returns an error.
5493 _cp = NULL;
5494 _fields = NULL;
5495 _methods = NULL;
5496 _inner_classes = NULL;
5497 _local_interfaces = NULL;
5498 _transitive_interfaces = NULL;
5499 _combined_annotations = NULL;
5500 _annotations = _type_annotations = NULL;
5501 _fields_annotations = _fields_type_annotations = NULL;
5502 }
5503
5504 // Destructor to clean up
5505 ClassFileParser::~ClassFileParser() {
5506 if (_cp != NULL) {
5507 MetadataFactory::free_metadata(_loader_data, _cp);
5508 }
5509 if (_fields != NULL) {
5510 MetadataFactory::free_array<u2>(_loader_data, _fields);
5511 }
5512
5513 if (_methods != NULL) {
5514 // Free methods
5515 InstanceKlass::deallocate_methods(_loader_data, _methods);
5516 }
5517
5518 // beware of the Universe::empty_blah_array!!
5519 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5520 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5521 }
5522
5523 // Free interfaces
5524 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5525 _local_interfaces, _transitive_interfaces);
5526
5527 if (_combined_annotations != NULL) {
5528 // After all annotations arrays have been created, they are installed into the
5529 // Annotations object that will be assigned to the InstanceKlass being created.
5530
5531 // Deallocate the Annotations object and the installed annotations arrays.
5532 _combined_annotations->deallocate_contents(_loader_data);
5533
5534 // If the _combined_annotations pointer is non-NULL,
5535 // then the other annotations fields should have been cleared.
5536 assert(_annotations == NULL, "Should have been cleared");
5537 assert(_type_annotations == NULL, "Should have been cleared");
5538 assert(_fields_annotations == NULL, "Should have been cleared");
5539 assert(_fields_type_annotations == NULL, "Should have been cleared");
5540 } else {
5541 // If the annotations arrays were not installed into the Annotations object,
5542 // then they have to be deallocated explicitly.
5543 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5544 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5545 Annotations::free_contents(_loader_data, _fields_annotations);
5546 Annotations::free_contents(_loader_data, _fields_type_annotations);
5547 }
5548
5549 clear_class_metadata();
5550
5551 // deallocate the klass if already created. Don't directly deallocate, but add
5552 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5553 // at a safepoint.
5554 if (_klass_to_deallocate != NULL) {
5555 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5556 }
5557 }
5558
5559 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5560 TRAPS) {
5561
5562 assert(stream != NULL, "invariant");
5563 assert(_class_name != NULL, "invariant");
5564
5565 // BEGIN STREAM PARSING
5566 stream->guarantee_more(8, CHECK); // magic, major, minor
5567 // Magic value
5568 const u4 magic = stream->get_u4_fast();
5569 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5570 "Incompatible magic value %u in class file %s",
5571 magic, CHECK);
5572
5573 // Version numbers
5574 _minor_version = stream->get_u2_fast();
5575 _major_version = stream->get_u2_fast();
5576
5577 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5578 ResourceMark rm;
5579 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5580 _major_version, _minor_version, _class_name->as_C_string());
5581 Exceptions::fthrow(
5582 THREAD_AND_LOCATION,
5583 vmSymbols::java_lang_UnsupportedClassVersionError(),
5584 "Unsupported major.minor version for dump time %u.%u",
5585 _major_version,
5586 _minor_version);
5587 }
5588
5589 // Check version numbers - we check this even with verifier off
5590 if (!is_supported_version(_major_version, _minor_version)) {
5591 ResourceMark rm(THREAD);
5592 Exceptions::fthrow(
5593 THREAD_AND_LOCATION,
5594 vmSymbols::java_lang_UnsupportedClassVersionError(),
5595 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5596 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
5597 _class_name->as_C_string(),
5598 _major_version,
5599 _minor_version,
5600 JAVA_MAX_SUPPORTED_VERSION,
5601 JAVA_MAX_SUPPORTED_MINOR_VERSION);
5602 return;
5603 }
5604
5605 stream->guarantee_more(3, CHECK); // length, first cp tag
5606 const u2 cp_size = stream->get_u2_fast();
5607
5608 guarantee_property(
5609 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5610 cp_size, CHECK);
5611
5612 _cp = ConstantPool::allocate(_loader_data,
5613 cp_size,
5614 CHECK);
5615
5616 ConstantPool* const cp = _cp;
5617
5618 parse_constant_pool(stream, cp, cp_size, CHECK);
5619
5620 assert(cp_size == (const u2)cp->length(), "invariant");
5621
5622 // ACCESS FLAGS
5623 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5624
5625 // Access flags
5626 jint flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5627
5628 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5629 // Set abstract bit for old class files for backward compatibility
5630 flags |= JVM_ACC_ABSTRACT;
5631 }
5632
5633 _access_flags.set_flags(flags);
5634
5635 verify_legal_class_modifiers((jint)_access_flags.as_int(), CHECK);
5636
5637 // This class and superclass
5638 _this_class_index = stream->get_u2_fast();
5639 check_property(
5640 valid_cp_range(_this_class_index, cp_size) &&
5641 cp->tag_at(_this_class_index).is_unresolved_klass(),
5642 "Invalid this class index %u in constant pool in class file %s",
5643 _this_class_index, CHECK);
5644
5645 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5646 assert(class_name_in_cp != NULL, "class_name can't be null");
5647
5648 if (_parsed_name != NULL) {
5649 // It's important to set parsed_name *before* resolving the super class.
5650 // (it's used for cleanup by the caller if parsing fails)
5651 *_parsed_name = class_name_in_cp;
5652 // parsed_name is returned and can be used if there's an error, so add to
5653 // its reference count. Caller will decrement the refcount.
5654 (*_parsed_name)->increment_refcount();
5655 }
5656
5657 // Update _class_name which could be null previously
5658 // to reflect the name in the constant pool
5659 _class_name = class_name_in_cp;
5660
5661 // Don't need to check whether this class name is legal or not.
5662 // It has been checked when constant pool is parsed.
5663 // However, make sure it is not an array type.
5664 if (_need_verify) {
5665 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
5666 "Bad class name in class file %s",
5667 CHECK);
5668 }
5669
5670 // Checks if name in class file matches requested name
5671 if (_requested_name != NULL && _requested_name != _class_name) {
5672 ResourceMark rm(THREAD);
5673 Exceptions::fthrow(
5674 THREAD_AND_LOCATION,
5675 vmSymbols::java_lang_NoClassDefFoundError(),
5676 "%s (wrong name: %s)",
5677 _class_name->as_C_string(),
5678 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
5679 );
5680 return;
5681 }
5682
5683 if (!is_internal()) {
5684 if (TraceClassLoadingPreorder) {
5685 tty->print("[Loading %s",
5686 _class_name->as_klass_external_name());
5687
5688 if (stream->source() != NULL) {
5689 tty->print(" from %s", stream->source());
5690 }
5691 tty->print_cr("]");
5692 }
5693 #if INCLUDE_CDS
5694 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5695 // Only dump the classes that can be stored into CDS archive
5696 if (SystemDictionaryShared::is_sharing_possible(_loader_data)) {
5697 ResourceMark rm(THREAD);
5698 classlist_file->print_cr("%s", _class_name->as_C_string());
5699 classlist_file->flush();
5700 }
5701 }
5702 #endif
5703 }
5704
5705 // SUPERKLASS
5706 _super_class_index = stream->get_u2_fast();
5707 _super_klass = parse_super_class(cp,
5708 _super_class_index,
5709 _need_verify,
5710 CHECK);
5711
5712 // Interfaces
5713 _itfs_len = stream->get_u2_fast();
5714 parse_interfaces(stream,
5715 _itfs_len,
5716 cp,
5717 &_has_default_methods,
5718 CHECK);
5719
5720 assert(_local_interfaces != NULL, "invariant");
5721
5722 // Fields (offsets are filled in later)
5723 _fac = new FieldAllocationCount();
5724 parse_fields(stream,
5725 _access_flags.is_interface(),
5726 _fac,
5727 cp,
5728 cp_size,
5729 &_java_fields_count,
5730 CHECK);
5731
5732 assert(_fields != NULL, "invariant");
5733
5734 // Methods
5735 AccessFlags promoted_flags;
5736 parse_methods(stream,
5737 _access_flags.is_interface(),
5738 &promoted_flags,
5739 &_has_final_method,
5740 &_declares_default_methods,
5741 CHECK);
5742
5743 assert(_methods != NULL, "invariant");
5744
5745 // promote flags from parse_methods() to the klass' flags
5746 _access_flags.add_promoted_flags(promoted_flags.as_int());
5747
5748 if (_declares_default_methods) {
5749 _has_default_methods = true;
5750 }
5751
5752 // Additional attributes/annotations
5753 _parsed_annotations = new ClassAnnotationCollector();
5754 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5755
5756 assert(_inner_classes != NULL, "invariant");
5757
5758 // Finalize the Annotations metadata object,
5759 // now that all annotation arrays have been created.
5760 create_combined_annotations(CHECK);
5761
5762 // Make sure this is the end of class file stream
5763 guarantee_property(stream->at_eos(),
5764 "Extra bytes at the end of class file %s",
5765 CHECK);
5766
5767 // all bytes in stream read and parsed
5768 }
5769
5770 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5771 ConstantPool* cp,
5772 TRAPS) {
5773 assert(stream != NULL, "invariant");
5774 assert(stream->at_eos(), "invariant");
5775 assert(cp != NULL, "invariant");
5776 assert(_loader_data != NULL, "invariant");
5777
5778 // We check super class after class file is parsed and format is checked
5779 if (_super_class_index > 0 && NULL ==_super_klass) {
5780 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5781 if (_access_flags.is_interface()) {
5782 // Before attempting to resolve the superclass, check for class format
5783 // errors not checked yet.
5784 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5785 "Interfaces must have java.lang.Object as superclass in class file %s",
5786 CHECK);
5787 }
5788 _super_klass = (const InstanceKlass*)
5789 SystemDictionary::resolve_super_or_fail(_class_name,
5790 super_class_name,
5791 _loader_data->class_loader(),
5792 _protection_domain,
5793 true,
5794 CHECK);
5795 }
5796
5797 if (_super_klass != NULL) {
5798 if (_super_klass->has_default_methods()) {
5799 _has_default_methods = true;
5800 }
5801
5802 if (_super_klass->is_interface()) {
5803 ResourceMark rm(THREAD);
5804 Exceptions::fthrow(
5805 THREAD_AND_LOCATION,
5806 vmSymbols::java_lang_IncompatibleClassChangeError(),
5807 "class %s has interface %s as super class",
5808 _class_name->as_klass_external_name(),
5809 _super_klass->external_name()
5810 );
5811 return;
5812 }
5813 // Make sure super class is not final
5814 if (_super_klass->is_final()) {
5815 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
5816 }
5817 }
5818
5819 // Compute the transitive list of all unique interfaces implemented by this class
5820 _transitive_interfaces =
5821 compute_transitive_interfaces(_super_klass,
5822 _local_interfaces,
5823 _loader_data,
5824 CHECK);
5825
5826 assert(_transitive_interfaces != NULL, "invariant");
5827
5828 // sort methods
5829 _method_ordering = sort_methods(_methods);
5830
5831 _all_mirandas = new GrowableArray<Method*>(20);
5832
5833 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5834 &_num_miranda_methods,
5835 _all_mirandas,
5836 _super_klass,
5837 _methods,
5838 _access_flags,
5839 _loader_data->class_loader(),
5840 _class_name,
5841 _local_interfaces,
5842 CHECK);
5843
5844 // Size of Java itable (in words)
5845 _itable_size = _access_flags.is_interface() ? 0 :
5846 klassItable::compute_itable_size(_transitive_interfaces);
5847
5848 assert(_fac != NULL, "invariant");
5849 assert(_parsed_annotations != NULL, "invariant");
5850
5851 _field_info = new FieldLayoutInfo();
5852 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
5853
5854 // Compute reference typ
5855 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
5856
5857 }
5858
5859 void ClassFileParser::set_klass(InstanceKlass* klass) {
5860
5861 #ifdef ASSERT
5862 if (klass != NULL) {
5863 assert(NULL == _klass, "leaking?");
5864 }
5865 #endif
5866
5867 _klass = klass;
5868 }
5869
5870 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
5871
5872 #ifdef ASSERT
5873 if (klass != NULL) {
5874 assert(NULL == _klass_to_deallocate, "leaking?");
5875 }
5876 #endif
5877
5878 _klass_to_deallocate = klass;
5879 }
5880
5881 // Caller responsible for ResourceMark
5882 // clone stream with rewound position
5883 const ClassFileStream* ClassFileParser::clone_stream() const {
5884 assert(_stream != NULL, "invariant");
5885
5886 return _stream->clone();
5887 }