1 /*
2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24 #include "precompiled.hpp"
25 #include "classfile/classFileParser.hpp"
26 #include "classfile/classFileStream.hpp"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/classLoaderData.inline.hpp"
29 #include "classfile/defaultMethods.hpp"
30 #include "classfile/javaClasses.inline.hpp"
31 #include "classfile/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 "memory/allocation.hpp"
38 #include "memory/metadataFactory.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/resourceArea.hpp"
41 #include "memory/universe.inline.hpp"
42 #include "oops/annotations.hpp"
43 #include "oops/fieldStreams.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/instanceMirrorKlass.hpp"
46 #include "oops/klass.inline.hpp"
47 #include "oops/klassVtable.hpp"
48 #include "oops/metadata.hpp"
49 #include "oops/method.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "oops/symbol.hpp"
52 #include "prims/jvm.h"
53 #include "prims/jvmtiExport.hpp"
54 #include "prims/jvmtiThreadState.hpp"
55 #include "runtime/javaCalls.hpp"
56 #include "runtime/perfData.hpp"
57 #include "runtime/reflection.hpp"
58 #include "runtime/signature.hpp"
59 #include "runtime/timer.hpp"
60 #include "services/classLoadingService.hpp"
61 #include "services/threadService.hpp"
62 #include "trace/traceMacros.hpp"
63 #include "utilities/array.hpp"
64 #include "utilities/exceptions.hpp"
65 #include "utilities/globalDefinitions.hpp"
66 #include "utilities/macros.hpp"
67 #include "utilities/ostream.hpp"
68 #include "utilities/resourceHash.hpp"
69 #if INCLUDE_CDS
70 #include "classfile/systemDictionaryShared.hpp"
71 #endif
72
73 // We generally try to create the oops directly when parsing, rather than
74 // allocating temporary data structures and copying the bytes twice. A
75 // temporary area is only needed when parsing utf8 entries in the constant
76 // pool and when parsing line number tables.
77
78 // We add assert in debug mode when class format is not checked.
79
80 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
81 #define JAVA_MIN_SUPPORTED_VERSION 45
82 #define JAVA_MAX_SUPPORTED_VERSION 53
83 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
84
85 // Used for two backward compatibility reasons:
86 // - to check for new additions to the class file format in JDK1.5
87 // - to check for bug fixes in the format checker in JDK1.5
88 #define JAVA_1_5_VERSION 49
89
90 // Used for backward compatibility reasons:
91 // - to check for javac bug fixes that happened after 1.5
92 // - also used as the max version when running in jdk6
93 #define JAVA_6_VERSION 50
94
95 // Used for backward compatibility reasons:
96 // - to check NameAndType_info signatures more aggressively
97 // - to disallow argument and require ACC_STATIC for <clinit> methods
98 #define JAVA_7_VERSION 51
99
100 // Extension method support.
101 #define JAVA_8_VERSION 52
102
103 // New 'Module' attribute
104 #define JAVA_9_VERSION 53
105
106 enum { LegalClass, LegalField, LegalMethod }; // used to verify unqualified names
107
108 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
109 ConstantPool* cp,
110 const int length,
111 TRAPS) {
112 assert(stream != NULL, "invariant");
113 assert(cp != NULL, "invariant");
114
115 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
116 // this function (_current can be allocated in a register, with scalar
117 // replacement of aggregates). The _current pointer is copied back to
118 // stream() when this function returns. DON'T call another method within
119 // this method that uses stream().
120 const ClassFileStream cfs1 = *stream;
121 const ClassFileStream* const cfs = &cfs1;
122
123 assert(cfs->allocated_on_stack(), "should be local");
124 debug_only(const u1* const old_current = stream->current();)
125
126 // Used for batching symbol allocations.
127 const char* names[SymbolTable::symbol_alloc_batch_size];
128 int lengths[SymbolTable::symbol_alloc_batch_size];
129 int indices[SymbolTable::symbol_alloc_batch_size];
130 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
131 int names_count = 0;
132
133 // parsing Index 0 is unused
134 for (int index = 1; index < length; index++) {
135 // Each of the following case guarantees one more byte in the stream
136 // for the following tag or the access_flags following constant pool,
137 // so we don't need bounds-check for reading tag.
138 const u1 tag = cfs->get_u1_fast();
139 switch (tag) {
140 case JVM_CONSTANT_Class : {
141 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
142 const u2 name_index = cfs->get_u2_fast();
143 cp->klass_index_at_put(index, name_index);
144 break;
145 }
146 case JVM_CONSTANT_Fieldref: {
147 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
148 const u2 class_index = cfs->get_u2_fast();
149 const u2 name_and_type_index = cfs->get_u2_fast();
150 cp->field_at_put(index, class_index, name_and_type_index);
151 break;
152 }
153 case JVM_CONSTANT_Methodref: {
154 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
155 const u2 class_index = cfs->get_u2_fast();
156 const u2 name_and_type_index = cfs->get_u2_fast();
157 cp->method_at_put(index, class_index, name_and_type_index);
158 break;
159 }
160 case JVM_CONSTANT_InterfaceMethodref: {
161 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
162 const u2 class_index = cfs->get_u2_fast();
163 const u2 name_and_type_index = cfs->get_u2_fast();
164 cp->interface_method_at_put(index, class_index, name_and_type_index);
165 break;
166 }
167 case JVM_CONSTANT_String : {
168 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
169 const u2 string_index = cfs->get_u2_fast();
170 cp->string_index_at_put(index, string_index);
171 break;
172 }
173 case JVM_CONSTANT_MethodHandle :
174 case JVM_CONSTANT_MethodType: {
175 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
176 classfile_parse_error(
177 "Class file version does not support constant tag %u in class file %s",
178 tag, CHECK);
179 }
180 if (tag == JVM_CONSTANT_MethodHandle) {
181 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
182 const u1 ref_kind = cfs->get_u1_fast();
183 const u2 method_index = cfs->get_u2_fast();
184 cp->method_handle_index_at_put(index, ref_kind, method_index);
185 }
186 else if (tag == JVM_CONSTANT_MethodType) {
187 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
188 const u2 signature_index = cfs->get_u2_fast();
189 cp->method_type_index_at_put(index, signature_index);
190 }
191 else {
192 ShouldNotReachHere();
193 }
194 break;
195 }
196 case JVM_CONSTANT_InvokeDynamic : {
197 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
198 classfile_parse_error(
199 "Class file version does not support constant tag %u in class file %s",
200 tag, CHECK);
201 }
202 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
203 const u2 bootstrap_specifier_index = cfs->get_u2_fast();
204 const u2 name_and_type_index = cfs->get_u2_fast();
205 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
206 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
207 }
208 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
209 break;
210 }
211 case JVM_CONSTANT_Integer: {
212 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
213 const u4 bytes = cfs->get_u4_fast();
214 cp->int_at_put(index, (jint)bytes);
215 break;
216 }
217 case JVM_CONSTANT_Float: {
218 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
219 const u4 bytes = cfs->get_u4_fast();
220 cp->float_at_put(index, *(jfloat*)&bytes);
221 break;
222 }
223 case JVM_CONSTANT_Long: {
224 // A mangled type might cause you to overrun allocated memory
225 guarantee_property(index + 1 < length,
226 "Invalid constant pool entry %u in class file %s",
227 index,
228 CHECK);
229 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
230 const u8 bytes = cfs->get_u8_fast();
231 cp->long_at_put(index, bytes);
232 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
233 break;
234 }
235 case JVM_CONSTANT_Double: {
236 // A mangled type might cause you to overrun allocated memory
237 guarantee_property(index+1 < length,
238 "Invalid constant pool entry %u in class file %s",
239 index,
240 CHECK);
241 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
242 const u8 bytes = cfs->get_u8_fast();
243 cp->double_at_put(index, *(jdouble*)&bytes);
244 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
245 break;
246 }
247 case JVM_CONSTANT_NameAndType: {
248 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
249 const u2 name_index = cfs->get_u2_fast();
250 const u2 signature_index = cfs->get_u2_fast();
251 cp->name_and_type_at_put(index, name_index, signature_index);
252 break;
253 }
254 case JVM_CONSTANT_Utf8 : {
255 cfs->guarantee_more(2, CHECK); // utf8_length
256 u2 utf8_length = cfs->get_u2_fast();
257 const u1* utf8_buffer = cfs->get_u1_buffer();
258 assert(utf8_buffer != NULL, "null utf8 buffer");
259 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
260 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
261 cfs->skip_u1_fast(utf8_length);
262
263 // Before storing the symbol, make sure it's legal
264 if (_need_verify) {
265 verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
266 }
267
268 if (has_cp_patch_at(index)) {
269 Handle patch = clear_cp_patch_at(index);
270 guarantee_property(java_lang_String::is_instance(patch()),
271 "Illegal utf8 patch at %d in class file %s",
272 index,
273 CHECK);
274 const char* const str = java_lang_String::as_utf8_string(patch());
275 // (could use java_lang_String::as_symbol instead, but might as well batch them)
276 utf8_buffer = (const u1*) str;
277 utf8_length = (int) strlen(str);
278 }
279
280 unsigned int hash;
281 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
282 utf8_length,
283 hash);
284 if (result == NULL) {
285 names[names_count] = (const char*)utf8_buffer;
286 lengths[names_count] = utf8_length;
287 indices[names_count] = index;
288 hashValues[names_count++] = hash;
289 if (names_count == SymbolTable::symbol_alloc_batch_size) {
290 SymbolTable::new_symbols(_loader_data,
291 cp,
292 names_count,
293 names,
294 lengths,
295 indices,
296 hashValues,
297 CHECK);
298 names_count = 0;
299 }
300 } else {
301 cp->symbol_at_put(index, result);
302 }
303 break;
304 }
305 default: {
306 classfile_parse_error("Unknown constant tag %u in class file %s",
307 tag,
308 CHECK);
309 break;
310 }
311 } // end of switch(tag)
312 } // end of for
313
314 // Allocate the remaining symbols
315 if (names_count > 0) {
316 SymbolTable::new_symbols(_loader_data,
317 cp,
318 names_count,
319 names,
320 lengths,
321 indices,
322 hashValues,
323 CHECK);
324 }
325
326 // Copy _current pointer of local copy back to stream.
327 assert(stream->current() == old_current, "non-exclusive use of stream");
328 stream->set_current(cfs1.current());
329
330 }
331
332 static inline bool valid_cp_range(int index, int length) {
333 return (index > 0 && index < length);
334 }
335
336 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
337 assert(cp != NULL, "invariant");
338 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
339 return cp->symbol_at(index);
340 }
341 return NULL;
342 }
343
344 #ifdef ASSERT
345 PRAGMA_DIAG_PUSH
346 PRAGMA_FORMAT_NONLITERAL_IGNORED
347 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
348 ResourceMark rm(THREAD);
349 fatal(msg, _class_name->as_C_string());
350 }
351
352 void ClassFileParser::report_assert_property_failure(const char* msg,
353 int index,
354 TRAPS) const {
355 ResourceMark rm(THREAD);
356 fatal(msg, index, _class_name->as_C_string());
357 }
358 PRAGMA_DIAG_POP
359 #endif
360
361 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
362 ConstantPool* const cp,
363 const int length,
364 TRAPS) {
365 assert(cp != NULL, "invariant");
366 assert(stream != NULL, "invariant");
367
368 // parsing constant pool entries
369 parse_constant_pool_entries(stream, cp, length, CHECK);
370
371 int index = 1; // declared outside of loops for portability
372
373 // first verification pass - validate cross references
374 // and fixup class and string constants
375 for (index = 1; index < length; index++) { // Index 0 is unused
376 const jbyte tag = cp->tag_at(index).value();
377 switch (tag) {
378 case JVM_CONSTANT_Class: {
379 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
380 break;
381 }
382 case JVM_CONSTANT_Fieldref:
383 // fall through
384 case JVM_CONSTANT_Methodref:
385 // fall through
386 case JVM_CONSTANT_InterfaceMethodref: {
387 if (!_need_verify) break;
388 const int klass_ref_index = cp->klass_ref_index_at(index);
389 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
390 check_property(valid_klass_reference_at(klass_ref_index),
391 "Invalid constant pool index %u in class file %s",
392 klass_ref_index, CHECK);
393 check_property(valid_cp_range(name_and_type_ref_index, length) &&
394 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
395 "Invalid constant pool index %u in class file %s",
396 name_and_type_ref_index, CHECK);
397 break;
398 }
399 case JVM_CONSTANT_String: {
400 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
401 break;
402 }
403 case JVM_CONSTANT_Integer:
404 break;
405 case JVM_CONSTANT_Float:
406 break;
407 case JVM_CONSTANT_Long:
408 case JVM_CONSTANT_Double: {
409 index++;
410 check_property(
411 (index < length && cp->tag_at(index).is_invalid()),
412 "Improper constant pool long/double index %u in class file %s",
413 index, CHECK);
414 break;
415 }
416 case JVM_CONSTANT_NameAndType: {
417 if (!_need_verify) break;
418 const int name_ref_index = cp->name_ref_index_at(index);
419 const int signature_ref_index = cp->signature_ref_index_at(index);
420 check_property(valid_symbol_at(name_ref_index),
421 "Invalid constant pool index %u in class file %s",
422 name_ref_index, CHECK);
423 check_property(valid_symbol_at(signature_ref_index),
424 "Invalid constant pool index %u in class file %s",
425 signature_ref_index, CHECK);
426 break;
427 }
428 case JVM_CONSTANT_Utf8:
429 break;
430 case JVM_CONSTANT_UnresolvedClass: // fall-through
431 case JVM_CONSTANT_UnresolvedClassInError: {
432 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
433 break;
434 }
435 case JVM_CONSTANT_ClassIndex: {
436 const int class_index = cp->klass_index_at(index);
437 check_property(valid_symbol_at(class_index),
438 "Invalid constant pool index %u in class file %s",
439 class_index, CHECK);
440 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
441 break;
442 }
443 case JVM_CONSTANT_StringIndex: {
444 const int string_index = cp->string_index_at(index);
445 check_property(valid_symbol_at(string_index),
446 "Invalid constant pool index %u in class file %s",
447 string_index, CHECK);
448 Symbol* const sym = cp->symbol_at(string_index);
449 cp->unresolved_string_at_put(index, sym);
450 break;
451 }
452 case JVM_CONSTANT_MethodHandle: {
453 const int ref_index = cp->method_handle_index_at(index);
454 check_property(valid_cp_range(ref_index, length),
455 "Invalid constant pool index %u in class file %s",
456 ref_index, CHECK);
457 const constantTag tag = cp->tag_at(ref_index);
458 const int ref_kind = cp->method_handle_ref_kind_at(index);
459
460 switch (ref_kind) {
461 case JVM_REF_getField:
462 case JVM_REF_getStatic:
463 case JVM_REF_putField:
464 case JVM_REF_putStatic: {
465 check_property(
466 tag.is_field(),
467 "Invalid constant pool index %u in class file %s (not a field)",
468 ref_index, CHECK);
469 break;
470 }
471 case JVM_REF_invokeVirtual:
472 case JVM_REF_newInvokeSpecial: {
473 check_property(
474 tag.is_method(),
475 "Invalid constant pool index %u in class file %s (not a method)",
476 ref_index, CHECK);
477 break;
478 }
479 case JVM_REF_invokeStatic:
480 case JVM_REF_invokeSpecial: {
481 check_property(
482 tag.is_method() ||
483 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
484 "Invalid constant pool index %u in class file %s (not a method)",
485 ref_index, CHECK);
486 break;
487 }
488 case JVM_REF_invokeInterface: {
489 check_property(
490 tag.is_interface_method(),
491 "Invalid constant pool index %u in class file %s (not an interface method)",
492 ref_index, CHECK);
493 break;
494 }
495 default: {
496 classfile_parse_error(
497 "Bad method handle kind at constant pool index %u in class file %s",
498 index, CHECK);
499 }
500 } // switch(refkind)
501 // Keep the ref_index unchanged. It will be indirected at link-time.
502 break;
503 } // case MethodHandle
504 case JVM_CONSTANT_MethodType: {
505 const int ref_index = cp->method_type_index_at(index);
506 check_property(valid_symbol_at(ref_index),
507 "Invalid constant pool index %u in class file %s",
508 ref_index, CHECK);
509 break;
510 }
511 case JVM_CONSTANT_InvokeDynamic: {
512 const int name_and_type_ref_index =
513 cp->invoke_dynamic_name_and_type_ref_index_at(index);
514
515 check_property(valid_cp_range(name_and_type_ref_index, length) &&
516 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
517 "Invalid constant pool index %u in class file %s",
518 name_and_type_ref_index, CHECK);
519 // bootstrap specifier index must be checked later,
520 // when BootstrapMethods attr is available
521 break;
522 }
523 default: {
524 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
525 ShouldNotReachHere();
526 break;
527 }
528 } // switch(tag)
529 } // end of for
530
531 if (_cp_patches != NULL) {
532 // need to treat this_class specially...
533 int this_class_index;
534 {
535 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
536 const u1* const mark = stream->current();
537 stream->skip_u2_fast(1); // skip flags
538 this_class_index = stream->get_u2_fast();
539 stream->set_current(mark); // revert to mark
540 }
541
542 for (index = 1; index < length; index++) { // Index 0 is unused
543 if (has_cp_patch_at(index)) {
544 guarantee_property(index != this_class_index,
545 "Illegal constant pool patch to self at %d in class file %s",
546 index, CHECK);
547 patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
548 }
549 }
550 }
551
552 if (!_need_verify) {
553 return;
554 }
555
556 // second verification pass - checks the strings are of the right format.
557 // but not yet to the other entries
558 for (index = 1; index < length; index++) {
559 const jbyte tag = cp->tag_at(index).value();
560 switch (tag) {
561 case JVM_CONSTANT_UnresolvedClass: {
562 const Symbol* const class_name = cp->klass_name_at(index);
563 // check the name, even if _cp_patches will overwrite it
564 verify_legal_class_name(class_name, CHECK);
565 break;
566 }
567 case JVM_CONSTANT_NameAndType: {
568 if (_need_verify && _major_version >= JAVA_7_VERSION) {
569 const int sig_index = cp->signature_ref_index_at(index);
570 const int name_index = cp->name_ref_index_at(index);
571 const Symbol* const name = cp->symbol_at(name_index);
572 const Symbol* const sig = cp->symbol_at(sig_index);
573 guarantee_property(sig->utf8_length() != 0,
574 "Illegal zero length constant pool entry at %d in class %s",
575 sig_index, CHECK);
576 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
577 verify_legal_method_signature(name, sig, CHECK);
578 } else {
579 verify_legal_field_signature(name, sig, CHECK);
580 }
581 }
582 break;
583 }
584 case JVM_CONSTANT_InvokeDynamic:
585 case JVM_CONSTANT_Fieldref:
586 case JVM_CONSTANT_Methodref:
587 case JVM_CONSTANT_InterfaceMethodref: {
588 const int name_and_type_ref_index =
589 cp->name_and_type_ref_index_at(index);
590 // already verified to be utf8
591 const int name_ref_index =
592 cp->name_ref_index_at(name_and_type_ref_index);
593 // already verified to be utf8
594 const int signature_ref_index =
595 cp->signature_ref_index_at(name_and_type_ref_index);
596 const Symbol* const name = cp->symbol_at(name_ref_index);
597 const Symbol* const signature = cp->symbol_at(signature_ref_index);
598 if (tag == JVM_CONSTANT_Fieldref) {
599 verify_legal_field_name(name, CHECK);
600 if (_need_verify && _major_version >= JAVA_7_VERSION) {
601 // Signature is verified above, when iterating NameAndType_info.
602 // Need only to be sure it's non-zero length and the right type.
603 if (signature->utf8_length() == 0 ||
604 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
605 throwIllegalSignature(
606 "Field", name, signature, CHECK);
607 }
608 } else {
609 verify_legal_field_signature(name, signature, CHECK);
610 }
611 } else {
612 verify_legal_method_name(name, CHECK);
613 if (_need_verify && _major_version >= JAVA_7_VERSION) {
614 // Signature is verified above, when iterating NameAndType_info.
615 // Need only to be sure it's non-zero length and the right type.
616 if (signature->utf8_length() == 0 ||
617 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
618 throwIllegalSignature(
619 "Method", name, signature, CHECK);
620 }
621 } else {
622 verify_legal_method_signature(name, signature, CHECK);
623 }
624 if (tag == JVM_CONSTANT_Methodref) {
625 // 4509014: If a class method name begins with '<', it must be "<init>".
626 assert(name != NULL, "method name in constant pool is null");
627 const unsigned int name_len = name->utf8_length();
628 if (name_len != 0 && name->byte_at(0) == '<') {
629 if (name != vmSymbols::object_initializer_name()) {
630 classfile_parse_error(
631 "Bad method name at constant pool index %u in class file %s",
632 name_ref_index, CHECK);
633 }
634 }
635 }
636 }
637 break;
638 }
639 case JVM_CONSTANT_MethodHandle: {
640 const int ref_index = cp->method_handle_index_at(index);
641 const int ref_kind = cp->method_handle_ref_kind_at(index);
642 switch (ref_kind) {
643 case JVM_REF_invokeVirtual:
644 case JVM_REF_invokeStatic:
645 case JVM_REF_invokeSpecial:
646 case JVM_REF_newInvokeSpecial: {
647 const int name_and_type_ref_index =
648 cp->name_and_type_ref_index_at(ref_index);
649 const int name_ref_index =
650 cp->name_ref_index_at(name_and_type_ref_index);
651 const Symbol* const name = cp->symbol_at(name_ref_index);
652 if (ref_kind == JVM_REF_newInvokeSpecial) {
653 if (name != vmSymbols::object_initializer_name()) {
654 classfile_parse_error(
655 "Bad constructor name at constant pool index %u in class file %s",
656 name_ref_index, CHECK);
657 }
658 } else {
659 if (name == vmSymbols::object_initializer_name()) {
660 classfile_parse_error(
661 "Bad method name at constant pool index %u in class file %s",
662 name_ref_index, CHECK);
663 }
664 }
665 break;
666 }
667 // Other ref_kinds are already fully checked in previous pass.
668 } // switch(ref_kind)
669 break;
670 }
671 case JVM_CONSTANT_MethodType: {
672 const Symbol* const no_name = vmSymbols::type_name(); // place holder
673 const Symbol* const signature = cp->method_type_signature_at(index);
674 verify_legal_method_signature(no_name, signature, CHECK);
675 break;
676 }
677 case JVM_CONSTANT_Utf8: {
678 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
679 }
680 } // switch(tag)
681 } // end of for
682 }
683
684 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
685 int index,
686 Handle patch,
687 TRAPS) {
688 assert(cp != NULL, "invariant");
689
690 BasicType patch_type = T_VOID;
691
692 switch (cp->tag_at(index).value()) {
693
694 case JVM_CONSTANT_UnresolvedClass: {
695 // Patching a class means pre-resolving it.
696 // The name in the constant pool is ignored.
697 if (java_lang_Class::is_instance(patch())) {
698 guarantee_property(!java_lang_Class::is_primitive(patch()),
699 "Illegal class patch at %d in class file %s",
700 index, CHECK);
701 cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
702 } else {
703 guarantee_property(java_lang_String::is_instance(patch()),
704 "Illegal class patch at %d in class file %s",
705 index, CHECK);
706 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
707 cp->unresolved_klass_at_put(index, name);
708 }
709 break;
710 }
711
712 case JVM_CONSTANT_String: {
713 // skip this patch and don't clear it. Needs the oop array for resolved
714 // references to be created first.
715 return;
716 }
717 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim;
718 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim;
719 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim;
720 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim;
721 patch_prim:
722 {
723 jvalue value;
724 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
725 guarantee_property(value_type == patch_type,
726 "Illegal primitive patch at %d in class file %s",
727 index, CHECK);
728 switch (value_type) {
729 case T_INT: cp->int_at_put(index, value.i); break;
730 case T_FLOAT: cp->float_at_put(index, value.f); break;
731 case T_LONG: cp->long_at_put(index, value.j); break;
732 case T_DOUBLE: cp->double_at_put(index, value.d); break;
733 default: assert(false, "");
734 }
735 } // end patch_prim label
736 break;
737
738 default: {
739 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
740 guarantee_property(!has_cp_patch_at(index),
741 "Illegal unexpected patch at %d in class file %s",
742 index, CHECK);
743 return;
744 }
745 } // end of switch(tag)
746
747 // On fall-through, mark the patch as used.
748 clear_cp_patch_at(index);
749 }
750 class NameSigHash: public ResourceObj {
751 public:
752 const Symbol* _name; // name
753 const Symbol* _sig; // signature
754 NameSigHash* _next; // Next entry in hash table
755 };
756
757 static const int HASH_ROW_SIZE = 256;
758
759 static unsigned int hash(const Symbol* name, const Symbol* sig) {
760 unsigned int raw_hash = 0;
761 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
762 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
763
764 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
765 }
766
767
768 static void initialize_hashtable(NameSigHash** table) {
769 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
770 }
771 // Return false if the name/sig combination is found in table.
772 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
773 // The old format checker uses heap sort to find duplicates.
774 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
775 // of table since we don't expect Symbol*'s to move.
776 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
777 assert(name != NULL, "name in constant pool is NULL");
778
779 // First lookup for duplicates
780 int index = hash(name, sig);
781 NameSigHash* entry = table[index];
782 while (entry != NULL) {
783 if (entry->_name == name && entry->_sig == sig) {
784 return false;
785 }
786 entry = entry->_next;
787 }
788
789 // No duplicate is found, allocate a new entry and fill it.
790 entry = new NameSigHash();
791 entry->_name = name;
792 entry->_sig = sig;
793
794 // Insert into hash table
795 entry->_next = table[index];
796 table[index] = entry;
797
798 return true;
799 }
800
801 // Side-effects: populates the _local_interfaces field
802 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
803 const int itfs_len,
804 ConstantPool* const cp,
805 bool* const has_default_methods,
806 TRAPS) {
807 assert(stream != NULL, "invariant");
808 assert(cp != NULL, "invariant");
809 assert(has_default_methods != NULL, "invariant");
810
811 if (itfs_len == 0) {
812 _local_interfaces = Universe::the_empty_klass_array();
813 } else {
814 assert(itfs_len > 0, "only called for len>0");
815 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
816
817 int index;
818 for (index = 0; index < itfs_len; index++) {
819 const u2 interface_index = stream->get_u2(CHECK);
820 KlassHandle interf;
821 check_property(
822 valid_klass_reference_at(interface_index),
823 "Interface name has bad constant pool index %u in class file %s",
824 interface_index, CHECK);
825 if (cp->tag_at(interface_index).is_klass()) {
826 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
827 } else {
828 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
829
830 // Don't need to check legal name because it's checked when parsing constant pool.
831 // But need to make sure it's not an array type.
832 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
833 "Bad interface name in class file %s", CHECK);
834
835 // Call resolve_super so classcircularity is checked
836 const Klass* const k =
837 SystemDictionary::resolve_super_or_fail(_class_name,
838 unresolved_klass,
839 _loader_data->class_loader(),
840 _protection_domain,
841 false,
842 CHECK);
843 interf = KlassHandle(THREAD, k);
844 }
845
846 if (!interf()->is_interface()) {
847 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
848 "Implementing class");
849 }
850
851 if (InstanceKlass::cast(interf())->has_default_methods()) {
852 *has_default_methods = true;
853 }
854 _local_interfaces->at_put(index, interf());
855 }
856
857 if (!_need_verify || itfs_len <= 1) {
858 return;
859 }
860
861 // Check if there's any duplicates in interfaces
862 ResourceMark rm(THREAD);
863 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
864 NameSigHash*,
865 HASH_ROW_SIZE);
866 initialize_hashtable(interface_names);
867 bool dup = false;
868 {
869 debug_only(NoSafepointVerifier nsv;)
870 for (index = 0; index < itfs_len; index++) {
871 const Klass* const k = _local_interfaces->at(index);
872 const Symbol* const name = InstanceKlass::cast(k)->name();
873 // If no duplicates, add (name, NULL) in hashtable interface_names.
874 if (!put_after_lookup(name, NULL, interface_names)) {
875 dup = true;
876 break;
877 }
878 }
879 }
880 if (dup) {
881 classfile_parse_error("Duplicate interface name in class file %s", CHECK);
882 }
883 }
884 }
885
886 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
887 int constantvalue_index,
888 int signature_index,
889 TRAPS) const {
890 // Make sure the constant pool entry is of a type appropriate to this field
891 guarantee_property(
892 (constantvalue_index > 0 &&
893 constantvalue_index < cp->length()),
894 "Bad initial value index %u in ConstantValue attribute in class file %s",
895 constantvalue_index, CHECK);
896
897 const constantTag value_type = cp->tag_at(constantvalue_index);
898 switch(cp->basic_type_for_signature_at(signature_index)) {
899 case T_LONG: {
900 guarantee_property(value_type.is_long(),
901 "Inconsistent constant value type in class file %s",
902 CHECK);
903 break;
904 }
905 case T_FLOAT: {
906 guarantee_property(value_type.is_float(),
907 "Inconsistent constant value type in class file %s",
908 CHECK);
909 break;
910 }
911 case T_DOUBLE: {
912 guarantee_property(value_type.is_double(),
913 "Inconsistent constant value type in class file %s",
914 CHECK);
915 break;
916 }
917 case T_BYTE:
918 case T_CHAR:
919 case T_SHORT:
920 case T_BOOLEAN:
921 case T_INT: {
922 guarantee_property(value_type.is_int(),
923 "Inconsistent constant value type in class file %s",
924 CHECK);
925 break;
926 }
927 case T_OBJECT: {
928 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
929 && value_type.is_string()),
930 "Bad string initial value in class file %s",
931 CHECK);
932 break;
933 }
934 default: {
935 classfile_parse_error("Unable to set initial value %u in class file %s",
936 constantvalue_index,
937 CHECK);
938 }
939 }
940 }
941
942 class AnnotationCollector : public ResourceObj{
943 public:
944 enum Location { _in_field, _in_method, _in_class };
945 enum ID {
946 _unknown = 0,
947 _method_CallerSensitive,
948 _method_ForceInline,
949 _method_DontInline,
950 _method_InjectedProfile,
951 _method_LambdaForm_Compiled,
952 _method_LambdaForm_Hidden,
953 _method_HotSpotIntrinsicCandidate,
954 _jdk_internal_vm_annotation_Contended,
955 _field_Stable,
956 _jdk_internal_vm_annotation_ReservedStackAccess,
957 _annotation_LIMIT
958 };
959 const Location _location;
960 int _annotations_present;
961 u2 _contended_group;
962
963 AnnotationCollector(Location location)
964 : _location(location), _annotations_present(0)
965 {
966 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
967 }
968 // If this annotation name has an ID, report it (or _none).
969 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
970 // Set the annotation name:
971 void set_annotation(ID id) {
972 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
973 _annotations_present |= nth_bit((int)id);
974 }
975
976 void remove_annotation(ID id) {
977 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
978 _annotations_present &= ~nth_bit((int)id);
979 }
980
981 // Report if the annotation is present.
982 bool has_any_annotations() const { return _annotations_present != 0; }
983 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
984
985 void set_contended_group(u2 group) { _contended_group = group; }
986 u2 contended_group() const { return _contended_group; }
987
988 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
989
990 void set_stable(bool stable) { set_annotation(_field_Stable); }
991 bool is_stable() const { return has_annotation(_field_Stable); }
992 };
993
994 // This class also doubles as a holder for metadata cleanup.
995 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
996 private:
997 ClassLoaderData* _loader_data;
998 AnnotationArray* _field_annotations;
999 AnnotationArray* _field_type_annotations;
1000 public:
1001 FieldAnnotationCollector(ClassLoaderData* loader_data) :
1002 AnnotationCollector(_in_field),
1003 _loader_data(loader_data),
1004 _field_annotations(NULL),
1005 _field_type_annotations(NULL) {}
1006 ~FieldAnnotationCollector();
1007 void apply_to(FieldInfo* f);
1008 AnnotationArray* field_annotations() { return _field_annotations; }
1009 AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1010
1011 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
1012 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1013 };
1014
1015 class MethodAnnotationCollector : public AnnotationCollector{
1016 public:
1017 MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1018 void apply_to(methodHandle m);
1019 };
1020
1021 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1022 public:
1023 ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1024 void apply_to(InstanceKlass* ik);
1025 };
1026
1027
1028 static int skip_annotation_value(const u1*, int, int); // fwd decl
1029
1030 // Skip an annotation. Return >=limit if there is any problem.
1031 static int skip_annotation(const u1* buffer, int limit, int index) {
1032 assert(buffer != NULL, "invariant");
1033 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1034 // value := switch (tag:u1) { ... }
1035 index += 2; // skip atype
1036 if ((index += 2) >= limit) return limit; // read nmem
1037 int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1038 while (--nmem >= 0 && index < limit) {
1039 index += 2; // skip member
1040 index = skip_annotation_value(buffer, limit, index);
1041 }
1042 return index;
1043 }
1044
1045 // Skip an annotation value. Return >=limit if there is any problem.
1046 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1047 assert(buffer != NULL, "invariant");
1048
1049 // value := switch (tag:u1) {
1050 // case B, C, I, S, Z, D, F, J, c: con:u2;
1051 // case e: e_class:u2 e_name:u2;
1052 // case s: s_con:u2;
1053 // case [: do(nval:u2) {value};
1054 // case @: annotation;
1055 // case s: s_con:u2;
1056 // }
1057 if ((index += 1) >= limit) return limit; // read tag
1058 const u1 tag = buffer[index - 1];
1059 switch (tag) {
1060 case 'B':
1061 case 'C':
1062 case 'I':
1063 case 'S':
1064 case 'Z':
1065 case 'D':
1066 case 'F':
1067 case 'J':
1068 case 'c':
1069 case 's':
1070 index += 2; // skip con or s_con
1071 break;
1072 case 'e':
1073 index += 4; // skip e_class, e_name
1074 break;
1075 case '[':
1076 {
1077 if ((index += 2) >= limit) return limit; // read nval
1078 int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1079 while (--nval >= 0 && index < limit) {
1080 index = skip_annotation_value(buffer, limit, index);
1081 }
1082 }
1083 break;
1084 case '@':
1085 index = skip_annotation(buffer, limit, index);
1086 break;
1087 default:
1088 return limit; // bad tag byte
1089 }
1090 return index;
1091 }
1092
1093 // Sift through annotations, looking for those significant to the VM:
1094 static void parse_annotations(const ConstantPool* const cp,
1095 const u1* buffer, int limit,
1096 AnnotationCollector* coll,
1097 ClassLoaderData* loader_data,
1098 TRAPS) {
1099
1100 assert(cp != NULL, "invariant");
1101 assert(buffer != NULL, "invariant");
1102 assert(coll != NULL, "invariant");
1103 assert(loader_data != NULL, "invariant");
1104
1105 // annotations := do(nann:u2) {annotation}
1106 int index = 0;
1107 if ((index += 2) >= limit) return; // read nann
1108 int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1109 enum { // initial annotation layout
1110 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1111 count_off = 2, // u2 such as 1 (one value)
1112 member_off = 4, // utf8 such as 'value'
1113 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1114 e_tag_val = 'e',
1115 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1116 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1117 e_size = 11, // end of 'e' annotation
1118 c_tag_val = 'c', // payload is type
1119 c_con_off = 7, // utf8 payload, such as 'I'
1120 c_size = 9, // end of 'c' annotation
1121 s_tag_val = 's', // payload is String
1122 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1123 s_size = 9,
1124 min_size = 6 // smallest possible size (zero members)
1125 };
1126 while ((--nann) >= 0 && (index - 2 + min_size <= limit)) {
1127 int index0 = index;
1128 index = skip_annotation(buffer, limit, index);
1129 const u1* const abase = buffer + index0;
1130 const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1131 const int count = Bytes::get_Java_u2((address)abase + count_off);
1132 const Symbol* const aname = check_symbol_at(cp, atype);
1133 if (aname == NULL) break; // invalid annotation name
1134 const Symbol* member = NULL;
1135 if (count >= 1) {
1136 const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1137 member = check_symbol_at(cp, member_index);
1138 if (member == NULL) break; // invalid member name
1139 }
1140
1141 // Here is where parsing particular annotations will take place.
1142 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1143 if (AnnotationCollector::_unknown == id) continue;
1144 coll->set_annotation(id);
1145
1146 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1147 // @Contended can optionally specify the contention group.
1148 //
1149 // Contended group defines the equivalence class over the fields:
1150 // the fields within the same contended group are not treated distinct.
1151 // The only exception is default group, which does not incur the
1152 // equivalence. Naturally, contention group for classes is meaningless.
1153 //
1154 // While the contention group is specified as String, annotation
1155 // values are already interned, and we might as well use the constant
1156 // pool index as the group tag.
1157 //
1158 u2 group_index = 0; // default contended group
1159 if (count == 1
1160 && s_size == (index - index0) // match size
1161 && s_tag_val == *(abase + tag_off)
1162 && member == vmSymbols::value_name()) {
1163 group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1164 if (cp->symbol_at(group_index)->utf8_length() == 0) {
1165 group_index = 0; // default contended group
1166 }
1167 }
1168 coll->set_contended_group(group_index);
1169 }
1170 }
1171 }
1172
1173
1174 // Parse attributes for a field.
1175 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1176 u2 attributes_count,
1177 bool is_static, u2 signature_index,
1178 u2* const constantvalue_index_addr,
1179 bool* const is_synthetic_addr,
1180 u2* const generic_signature_index_addr,
1181 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1182 TRAPS) {
1183 assert(cfs != NULL, "invariant");
1184 assert(constantvalue_index_addr != NULL, "invariant");
1185 assert(is_synthetic_addr != NULL, "invariant");
1186 assert(generic_signature_index_addr != NULL, "invariant");
1187 assert(parsed_annotations != NULL, "invariant");
1188 assert(attributes_count > 0, "attributes_count should be greater than 0");
1189
1190 u2 constantvalue_index = 0;
1191 u2 generic_signature_index = 0;
1192 bool is_synthetic = false;
1193 const u1* runtime_visible_annotations = NULL;
1194 int runtime_visible_annotations_length = 0;
1195 const u1* runtime_invisible_annotations = NULL;
1196 int runtime_invisible_annotations_length = 0;
1197 const u1* runtime_visible_type_annotations = NULL;
1198 int runtime_visible_type_annotations_length = 0;
1199 const u1* runtime_invisible_type_annotations = NULL;
1200 int runtime_invisible_type_annotations_length = 0;
1201 bool runtime_invisible_annotations_exists = false;
1202 bool runtime_invisible_type_annotations_exists = false;
1203 const ConstantPool* const cp = _cp;
1204
1205 while (attributes_count--) {
1206 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1207 const u2 attribute_name_index = cfs->get_u2_fast();
1208 const u4 attribute_length = cfs->get_u4_fast();
1209 check_property(valid_symbol_at(attribute_name_index),
1210 "Invalid field attribute index %u in class file %s",
1211 attribute_name_index,
1212 CHECK);
1213
1214 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1215 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1216 // ignore if non-static
1217 if (constantvalue_index != 0) {
1218 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1219 }
1220 check_property(
1221 attribute_length == 2,
1222 "Invalid ConstantValue field attribute length %u in class file %s",
1223 attribute_length, CHECK);
1224
1225 constantvalue_index = cfs->get_u2(CHECK);
1226 if (_need_verify) {
1227 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1228 }
1229 } else if (attribute_name == vmSymbols::tag_synthetic()) {
1230 if (attribute_length != 0) {
1231 classfile_parse_error(
1232 "Invalid Synthetic field attribute length %u in class file %s",
1233 attribute_length, CHECK);
1234 }
1235 is_synthetic = true;
1236 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1237 if (attribute_length != 0) {
1238 classfile_parse_error(
1239 "Invalid Deprecated field attribute length %u in class file %s",
1240 attribute_length, CHECK);
1241 }
1242 } else if (_major_version >= JAVA_1_5_VERSION) {
1243 if (attribute_name == vmSymbols::tag_signature()) {
1244 if (attribute_length != 2) {
1245 classfile_parse_error(
1246 "Wrong size %u for field's Signature attribute in class file %s",
1247 attribute_length, CHECK);
1248 }
1249 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1250 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1251 if (runtime_visible_annotations != NULL) {
1252 classfile_parse_error(
1253 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1254 }
1255 runtime_visible_annotations_length = attribute_length;
1256 runtime_visible_annotations = cfs->get_u1_buffer();
1257 assert(runtime_visible_annotations != NULL, "null visible annotations");
1258 parse_annotations(cp,
1259 runtime_visible_annotations,
1260 runtime_visible_annotations_length,
1261 parsed_annotations,
1262 _loader_data,
1263 CHECK);
1264 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
1265 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1266 if (runtime_invisible_annotations_exists) {
1267 classfile_parse_error(
1268 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1269 }
1270 runtime_invisible_annotations_exists = true;
1271 if (PreserveAllAnnotations) {
1272 runtime_invisible_annotations_length = attribute_length;
1273 runtime_invisible_annotations = cfs->get_u1_buffer();
1274 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1275 }
1276 cfs->skip_u1(attribute_length, CHECK);
1277 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1278 if (runtime_visible_type_annotations != NULL) {
1279 classfile_parse_error(
1280 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1281 }
1282 runtime_visible_type_annotations_length = attribute_length;
1283 runtime_visible_type_annotations = cfs->get_u1_buffer();
1284 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1285 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1286 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1287 if (runtime_invisible_type_annotations_exists) {
1288 classfile_parse_error(
1289 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1290 } else {
1291 runtime_invisible_type_annotations_exists = true;
1292 }
1293 if (PreserveAllAnnotations) {
1294 runtime_invisible_type_annotations_length = attribute_length;
1295 runtime_invisible_type_annotations = cfs->get_u1_buffer();
1296 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1297 }
1298 cfs->skip_u1(attribute_length, CHECK);
1299 } else {
1300 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1301 }
1302 } else {
1303 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1304 }
1305 }
1306
1307 *constantvalue_index_addr = constantvalue_index;
1308 *is_synthetic_addr = is_synthetic;
1309 *generic_signature_index_addr = generic_signature_index;
1310 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1311 runtime_visible_annotations_length,
1312 runtime_invisible_annotations,
1313 runtime_invisible_annotations_length,
1314 CHECK);
1315 parsed_annotations->set_field_annotations(a);
1316 a = assemble_annotations(runtime_visible_type_annotations,
1317 runtime_visible_type_annotations_length,
1318 runtime_invisible_type_annotations,
1319 runtime_invisible_type_annotations_length,
1320 CHECK);
1321 parsed_annotations->set_field_type_annotations(a);
1322 return;
1323 }
1324
1325
1326 // Field allocation types. Used for computing field offsets.
1327
1328 enum FieldAllocationType {
1329 STATIC_OOP, // Oops
1330 STATIC_BYTE, // Boolean, Byte, char
1331 STATIC_SHORT, // shorts
1332 STATIC_WORD, // ints
1333 STATIC_DOUBLE, // aligned long or double
1334 NONSTATIC_OOP,
1335 NONSTATIC_BYTE,
1336 NONSTATIC_SHORT,
1337 NONSTATIC_WORD,
1338 NONSTATIC_DOUBLE,
1339 MAX_FIELD_ALLOCATION_TYPE,
1340 BAD_ALLOCATION_TYPE = -1
1341 };
1342
1343 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1344 BAD_ALLOCATION_TYPE, // 0
1345 BAD_ALLOCATION_TYPE, // 1
1346 BAD_ALLOCATION_TYPE, // 2
1347 BAD_ALLOCATION_TYPE, // 3
1348 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1349 NONSTATIC_SHORT, // T_CHAR = 5,
1350 NONSTATIC_WORD, // T_FLOAT = 6,
1351 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1352 NONSTATIC_BYTE, // T_BYTE = 8,
1353 NONSTATIC_SHORT, // T_SHORT = 9,
1354 NONSTATIC_WORD, // T_INT = 10,
1355 NONSTATIC_DOUBLE, // T_LONG = 11,
1356 NONSTATIC_OOP, // T_OBJECT = 12,
1357 NONSTATIC_OOP, // T_ARRAY = 13,
1358 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1359 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1360 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1361 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1362 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1363 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1364 BAD_ALLOCATION_TYPE, // 0
1365 BAD_ALLOCATION_TYPE, // 1
1366 BAD_ALLOCATION_TYPE, // 2
1367 BAD_ALLOCATION_TYPE, // 3
1368 STATIC_BYTE , // T_BOOLEAN = 4,
1369 STATIC_SHORT, // T_CHAR = 5,
1370 STATIC_WORD, // T_FLOAT = 6,
1371 STATIC_DOUBLE, // T_DOUBLE = 7,
1372 STATIC_BYTE, // T_BYTE = 8,
1373 STATIC_SHORT, // T_SHORT = 9,
1374 STATIC_WORD, // T_INT = 10,
1375 STATIC_DOUBLE, // T_LONG = 11,
1376 STATIC_OOP, // T_OBJECT = 12,
1377 STATIC_OOP, // T_ARRAY = 13,
1378 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1379 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1380 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1381 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1382 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1383 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1384 };
1385
1386 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1387 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1388 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1389 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1390 return result;
1391 }
1392
1393 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1394 public:
1395 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1396
1397 FieldAllocationCount() {
1398 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1399 count[i] = 0;
1400 }
1401 }
1402
1403 FieldAllocationType update(bool is_static, BasicType type) {
1404 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1405 // Make sure there is no overflow with injected fields.
1406 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1407 count[atype]++;
1408 return atype;
1409 }
1410 };
1411
1412 // Side-effects: populates the _fields, _fields_annotations,
1413 // _fields_type_annotations fields
1414 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1415 bool is_interface,
1416 FieldAllocationCount* const fac,
1417 ConstantPool* cp,
1418 const int cp_size,
1419 u2* const java_fields_count_ptr,
1420 TRAPS) {
1421
1422 assert(cfs != NULL, "invariant");
1423 assert(fac != NULL, "invariant");
1424 assert(cp != NULL, "invariant");
1425 assert(java_fields_count_ptr != NULL, "invariant");
1426
1427 assert(NULL == _fields, "invariant");
1428 assert(NULL == _fields_annotations, "invariant");
1429 assert(NULL == _fields_type_annotations, "invariant");
1430
1431 cfs->guarantee_more(2, CHECK); // length
1432 const u2 length = cfs->get_u2_fast();
1433 *java_fields_count_ptr = length;
1434
1435 int num_injected = 0;
1436 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1437 &num_injected);
1438 const int total_fields = length + num_injected;
1439
1440 // The field array starts with tuples of shorts
1441 // [access, name index, sig index, initial value index, byte offset].
1442 // A generic signature slot only exists for field with generic
1443 // signature attribute. And the access flag is set with
1444 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1445 // signature slots are at the end of the field array and after all
1446 // other fields data.
1447 //
1448 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1449 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1450 // ...
1451 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1452 // [generic signature index]
1453 // [generic signature index]
1454 // ...
1455 //
1456 // Allocate a temporary resource array for field data. For each field,
1457 // a slot is reserved in the temporary array for the generic signature
1458 // index. After parsing all fields, the data are copied to a permanent
1459 // array and any unused slots will be discarded.
1460 ResourceMark rm(THREAD);
1461 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1462 u2,
1463 total_fields * (FieldInfo::field_slots + 1));
1464
1465 // The generic signature slots start after all other fields' data.
1466 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1467 int num_generic_signature = 0;
1468 for (int n = 0; n < length; n++) {
1469 // access_flags, name_index, descriptor_index, attributes_count
1470 cfs->guarantee_more(8, CHECK);
1471
1472 AccessFlags access_flags;
1473 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1474 verify_legal_field_modifiers(flags, is_interface, CHECK);
1475 access_flags.set_flags(flags);
1476
1477 const u2 name_index = cfs->get_u2_fast();
1478 check_property(valid_symbol_at(name_index),
1479 "Invalid constant pool index %u for field name in class file %s",
1480 name_index, CHECK);
1481 const Symbol* const name = cp->symbol_at(name_index);
1482 verify_legal_field_name(name, CHECK);
1483
1484 const u2 signature_index = cfs->get_u2_fast();
1485 check_property(valid_symbol_at(signature_index),
1486 "Invalid constant pool index %u for field signature in class file %s",
1487 signature_index, CHECK);
1488 const Symbol* const sig = cp->symbol_at(signature_index);
1489 verify_legal_field_signature(name, sig, CHECK);
1490
1491 u2 constantvalue_index = 0;
1492 bool is_synthetic = false;
1493 u2 generic_signature_index = 0;
1494 const bool is_static = access_flags.is_static();
1495 FieldAnnotationCollector parsed_annotations(_loader_data);
1496
1497 const u2 attributes_count = cfs->get_u2_fast();
1498 if (attributes_count > 0) {
1499 parse_field_attributes(cfs,
1500 attributes_count,
1501 is_static,
1502 signature_index,
1503 &constantvalue_index,
1504 &is_synthetic,
1505 &generic_signature_index,
1506 &parsed_annotations,
1507 CHECK);
1508
1509 if (parsed_annotations.field_annotations() != NULL) {
1510 if (_fields_annotations == NULL) {
1511 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1512 _loader_data, length, NULL,
1513 CHECK);
1514 }
1515 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1516 parsed_annotations.set_field_annotations(NULL);
1517 }
1518 if (parsed_annotations.field_type_annotations() != NULL) {
1519 if (_fields_type_annotations == NULL) {
1520 _fields_type_annotations =
1521 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1522 length,
1523 NULL,
1524 CHECK);
1525 }
1526 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1527 parsed_annotations.set_field_type_annotations(NULL);
1528 }
1529
1530 if (is_synthetic) {
1531 access_flags.set_is_synthetic();
1532 }
1533 if (generic_signature_index != 0) {
1534 access_flags.set_field_has_generic_signature();
1535 fa[generic_signature_slot] = generic_signature_index;
1536 generic_signature_slot ++;
1537 num_generic_signature ++;
1538 }
1539 }
1540
1541 FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1542 field->initialize(access_flags.as_short(),
1543 name_index,
1544 signature_index,
1545 constantvalue_index);
1546 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1547
1548 // Remember how many oops we encountered and compute allocation type
1549 const FieldAllocationType atype = fac->update(is_static, type);
1550 field->set_allocation_type(atype);
1551
1552 // After field is initialized with type, we can augment it with aux info
1553 if (parsed_annotations.has_any_annotations())
1554 parsed_annotations.apply_to(field);
1555 }
1556
1557 int index = length;
1558 if (num_injected != 0) {
1559 for (int n = 0; n < num_injected; n++) {
1560 // Check for duplicates
1561 if (injected[n].may_be_java) {
1562 const Symbol* const name = injected[n].name();
1563 const Symbol* const signature = injected[n].signature();
1564 bool duplicate = false;
1565 for (int i = 0; i < length; i++) {
1566 const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1567 if (name == cp->symbol_at(f->name_index()) &&
1568 signature == cp->symbol_at(f->signature_index())) {
1569 // Symbol is desclared in Java so skip this one
1570 duplicate = true;
1571 break;
1572 }
1573 }
1574 if (duplicate) {
1575 // These will be removed from the field array at the end
1576 continue;
1577 }
1578 }
1579
1580 // Injected field
1581 FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1582 field->initialize(JVM_ACC_FIELD_INTERNAL,
1583 injected[n].name_index,
1584 injected[n].signature_index,
1585 0);
1586
1587 const BasicType type = FieldType::basic_type(injected[n].signature());
1588
1589 // Remember how many oops we encountered and compute allocation type
1590 const FieldAllocationType atype = fac->update(false, type);
1591 field->set_allocation_type(atype);
1592 index++;
1593 }
1594 }
1595
1596 assert(NULL == _fields, "invariant");
1597
1598 _fields =
1599 MetadataFactory::new_array<u2>(_loader_data,
1600 index * FieldInfo::field_slots + num_generic_signature,
1601 CHECK);
1602 // Sometimes injected fields already exist in the Java source so
1603 // the fields array could be too long. In that case the
1604 // fields array is trimed. Also unused slots that were reserved
1605 // for generic signature indexes are discarded.
1606 {
1607 int i = 0;
1608 for (; i < index * FieldInfo::field_slots; i++) {
1609 _fields->at_put(i, fa[i]);
1610 }
1611 for (int j = total_fields * FieldInfo::field_slots;
1612 j < generic_signature_slot; j++) {
1613 _fields->at_put(i++, fa[j]);
1614 }
1615 assert(_fields->length() == i, "");
1616 }
1617
1618 if (_need_verify && length > 1) {
1619 // Check duplicated fields
1620 ResourceMark rm(THREAD);
1621 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1622 THREAD, NameSigHash*, HASH_ROW_SIZE);
1623 initialize_hashtable(names_and_sigs);
1624 bool dup = false;
1625 {
1626 debug_only(NoSafepointVerifier nsv;)
1627 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1628 const Symbol* const name = fs.name();
1629 const Symbol* const sig = fs.signature();
1630 // If no duplicates, add name/signature in hashtable names_and_sigs.
1631 if (!put_after_lookup(name, sig, names_and_sigs)) {
1632 dup = true;
1633 break;
1634 }
1635 }
1636 }
1637 if (dup) {
1638 classfile_parse_error("Duplicate field name&signature in class file %s",
1639 CHECK);
1640 }
1641 }
1642 }
1643
1644
1645 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) {
1646 while (length-- > 0) {
1647 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1648 }
1649 }
1650
1651 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1652 u4 code_length,
1653 u4 exception_table_length,
1654 TRAPS) {
1655 assert(cfs != NULL, "invariant");
1656
1657 const u2* const exception_table_start = cfs->get_u2_buffer();
1658 assert(exception_table_start != NULL, "null exception table");
1659
1660 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1661 // end_pc,
1662 // handler_pc,
1663 // catch_type_index
1664
1665 // Will check legal target after parsing code array in verifier.
1666 if (_need_verify) {
1667 for (unsigned int i = 0; i < exception_table_length; i++) {
1668 const u2 start_pc = cfs->get_u2_fast();
1669 const u2 end_pc = cfs->get_u2_fast();
1670 const u2 handler_pc = cfs->get_u2_fast();
1671 const u2 catch_type_index = cfs->get_u2_fast();
1672 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1673 "Illegal exception table range in class file %s",
1674 CHECK_NULL);
1675 guarantee_property(handler_pc < code_length,
1676 "Illegal exception table handler in class file %s",
1677 CHECK_NULL);
1678 if (catch_type_index != 0) {
1679 guarantee_property(valid_klass_reference_at(catch_type_index),
1680 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1681 }
1682 }
1683 } else {
1684 cfs->skip_u2_fast(exception_table_length * 4);
1685 }
1686 return exception_table_start;
1687 }
1688
1689 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1690 u4 code_length,
1691 CompressedLineNumberWriteStream**const write_stream,
1692 TRAPS) {
1693
1694 const ClassFileStream* const cfs = _stream;
1695 unsigned int num_entries = cfs->get_u2(CHECK);
1696
1697 // Each entry is a u2 start_pc, and a u2 line_number
1698 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1699
1700 // Verify line number attribute and table length
1701 check_property(
1702 code_attribute_length == sizeof(u2) + length_in_bytes,
1703 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1704
1705 cfs->guarantee_more(length_in_bytes, CHECK);
1706
1707 if ((*write_stream) == NULL) {
1708 if (length_in_bytes > fixed_buffer_size) {
1709 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1710 } else {
1711 (*write_stream) = new CompressedLineNumberWriteStream(
1712 _linenumbertable_buffer, fixed_buffer_size);
1713 }
1714 }
1715
1716 while (num_entries-- > 0) {
1717 const u2 bci = cfs->get_u2_fast(); // start_pc
1718 const u2 line = cfs->get_u2_fast(); // line_number
1719 guarantee_property(bci < code_length,
1720 "Invalid pc in LineNumberTable in class file %s", CHECK);
1721 (*write_stream)->write_pair(bci, line);
1722 }
1723 }
1724
1725
1726 class LVT_Hash : public AllStatic {
1727 public:
1728
1729 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1730 /*
1731 * 3-tuple start_bci/length/slot has to be unique key,
1732 * so the following comparison seems to be redundant:
1733 * && elem->name_cp_index == entry->_elem->name_cp_index
1734 */
1735 return (e0.start_bci == e1.start_bci &&
1736 e0.length == e1.length &&
1737 e0.name_cp_index == e1.name_cp_index &&
1738 e0.slot == e1.slot);
1739 }
1740
1741 static unsigned int hash(LocalVariableTableElement const& e0) {
1742 unsigned int raw_hash = e0.start_bci;
1743
1744 raw_hash = e0.length + raw_hash * 37;
1745 raw_hash = e0.name_cp_index + raw_hash * 37;
1746 raw_hash = e0.slot + raw_hash * 37;
1747
1748 return raw_hash;
1749 }
1750 };
1751
1752
1753 // Class file LocalVariableTable elements.
1754 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1755 public:
1756 u2 start_bci;
1757 u2 length;
1758 u2 name_cp_index;
1759 u2 descriptor_cp_index;
1760 u2 slot;
1761 };
1762
1763 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1764 LocalVariableTableElement* const lvt) {
1765 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1766 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1767 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1768 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1769 lvt->signature_cp_index = 0;
1770 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1771 }
1772
1773 // Function is used to parse both attributes:
1774 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1775 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1776 u4 code_length,
1777 u2 max_locals,
1778 u4 code_attribute_length,
1779 u2* const localvariable_table_length,
1780 bool isLVTT,
1781 TRAPS) {
1782 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1783 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1784 const unsigned int size =
1785 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1786
1787 const ConstantPool* const cp = _cp;
1788
1789 // Verify local variable table attribute has right length
1790 if (_need_verify) {
1791 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1792 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1793 }
1794
1795 const u2* const localvariable_table_start = cfs->get_u2_buffer();
1796 assert(localvariable_table_start != NULL, "null local variable table");
1797 if (!_need_verify) {
1798 cfs->skip_u2_fast(size);
1799 } else {
1800 cfs->guarantee_more(size * 2, CHECK_NULL);
1801 for(int i = 0; i < (*localvariable_table_length); i++) {
1802 const u2 start_pc = cfs->get_u2_fast();
1803 const u2 length = cfs->get_u2_fast();
1804 const u2 name_index = cfs->get_u2_fast();
1805 const u2 descriptor_index = cfs->get_u2_fast();
1806 const u2 index = cfs->get_u2_fast();
1807 // Assign to a u4 to avoid overflow
1808 const u4 end_pc = (u4)start_pc + (u4)length;
1809
1810 if (start_pc >= code_length) {
1811 classfile_parse_error(
1812 "Invalid start_pc %u in %s in class file %s",
1813 start_pc, tbl_name, CHECK_NULL);
1814 }
1815 if (end_pc > code_length) {
1816 classfile_parse_error(
1817 "Invalid length %u in %s in class file %s",
1818 length, tbl_name, CHECK_NULL);
1819 }
1820 const int cp_size = cp->length();
1821 guarantee_property(valid_symbol_at(name_index),
1822 "Name index %u in %s has bad constant type in class file %s",
1823 name_index, tbl_name, CHECK_NULL);
1824 guarantee_property(valid_symbol_at(descriptor_index),
1825 "Signature index %u in %s has bad constant type in class file %s",
1826 descriptor_index, tbl_name, CHECK_NULL);
1827
1828 const Symbol* const name = cp->symbol_at(name_index);
1829 const Symbol* const sig = cp->symbol_at(descriptor_index);
1830 verify_legal_field_name(name, CHECK_NULL);
1831 u2 extra_slot = 0;
1832 if (!isLVTT) {
1833 verify_legal_field_signature(name, sig, CHECK_NULL);
1834
1835 // 4894874: check special cases for double and long local variables
1836 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1837 sig == vmSymbols::type_signature(T_LONG)) {
1838 extra_slot = 1;
1839 }
1840 }
1841 guarantee_property((index + extra_slot) < max_locals,
1842 "Invalid index %u in %s in class file %s",
1843 index, tbl_name, CHECK_NULL);
1844 }
1845 }
1846 return localvariable_table_start;
1847 }
1848
1849
1850 void ClassFileParser::parse_type_array(u2 array_length,
1851 u4 code_length,
1852 u4* const u1_index,
1853 u4* const u2_index,
1854 u1* const u1_array,
1855 u2* const u2_array,
1856 TRAPS) {
1857 const ClassFileStream* const cfs = _stream;
1858 u2 index = 0; // index in the array with long/double occupying two slots
1859 u4 i1 = *u1_index;
1860 u4 i2 = *u2_index + 1;
1861 for(int i = 0; i < array_length; i++) {
1862 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1863 index++;
1864 if (tag == ITEM_Long || tag == ITEM_Double) {
1865 index++;
1866 } else if (tag == ITEM_Object) {
1867 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1868 guarantee_property(valid_klass_reference_at(class_index),
1869 "Bad class index %u in StackMap in class file %s",
1870 class_index, CHECK);
1871 } else if (tag == ITEM_Uninitialized) {
1872 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1873 guarantee_property(
1874 offset < code_length,
1875 "Bad uninitialized type offset %u in StackMap in class file %s",
1876 offset, CHECK);
1877 } else {
1878 guarantee_property(
1879 tag <= (u1)ITEM_Uninitialized,
1880 "Unknown variable type %u in StackMap in class file %s",
1881 tag, CHECK);
1882 }
1883 }
1884 u2_array[*u2_index] = index;
1885 *u1_index = i1;
1886 *u2_index = i2;
1887 }
1888
1889 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1890 u4 code_attribute_length,
1891 bool need_verify,
1892 TRAPS) {
1893 assert(cfs != NULL, "invariant");
1894
1895 if (0 == code_attribute_length) {
1896 return NULL;
1897 }
1898
1899 const u1* const stackmap_table_start = cfs->get_u1_buffer();
1900 assert(stackmap_table_start != NULL, "null stackmap table");
1901
1902 // check code_attribute_length first
1903 cfs->skip_u1(code_attribute_length, CHECK_NULL);
1904
1905 if (!need_verify && !DumpSharedSpaces) {
1906 return NULL;
1907 }
1908 return stackmap_table_start;
1909 }
1910
1911 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1912 u2* const checked_exceptions_length,
1913 u4 method_attribute_length,
1914 TRAPS) {
1915 assert(cfs != NULL, "invariant");
1916 assert(checked_exceptions_length != NULL, "invariant");
1917
1918 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1919 *checked_exceptions_length = cfs->get_u2_fast();
1920 const unsigned int size =
1921 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1922 const u2* const checked_exceptions_start = cfs->get_u2_buffer();
1923 assert(checked_exceptions_start != NULL, "null checked exceptions");
1924 if (!_need_verify) {
1925 cfs->skip_u2_fast(size);
1926 } else {
1927 // Verify each value in the checked exception table
1928 u2 checked_exception;
1929 const u2 len = *checked_exceptions_length;
1930 cfs->guarantee_more(2 * len, CHECK_NULL);
1931 for (int i = 0; i < len; i++) {
1932 checked_exception = cfs->get_u2_fast();
1933 check_property(
1934 valid_klass_reference_at(checked_exception),
1935 "Exception name has bad type at constant pool %u in class file %s",
1936 checked_exception, CHECK_NULL);
1937 }
1938 }
1939 // check exceptions attribute length
1940 if (_need_verify) {
1941 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1942 sizeof(u2) * size),
1943 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1944 }
1945 return checked_exceptions_start;
1946 }
1947
1948 void ClassFileParser::throwIllegalSignature(const char* type,
1949 const Symbol* name,
1950 const Symbol* sig,
1951 TRAPS) const {
1952 assert(name != NULL, "invariant");
1953 assert(sig != NULL, "invariant");
1954
1955 ResourceMark rm(THREAD);
1956 Exceptions::fthrow(THREAD_AND_LOCATION,
1957 vmSymbols::java_lang_ClassFormatError(),
1958 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1959 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1960 }
1961
1962 AnnotationCollector::ID
1963 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1964 const Symbol* name) {
1965 const vmSymbols::SID sid = vmSymbols::find_sid(name);
1966 // Privileged code can use all annotations. Other code silently drops some.
1967 const bool privileged = loader_data->is_the_null_class_loader_data() ||
1968 loader_data->is_ext_class_loader_data() ||
1969 loader_data->is_anonymous();
1970 switch (sid) {
1971 case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_reflect_CallerSensitive_signature): {
1972 if (_location != _in_method) break; // only allow for methods
1973 if (!privileged) break; // only allow in privileged code
1974 return _method_CallerSensitive;
1975 }
1976 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1977 if (_location != _in_method) break; // only allow for methods
1978 if (!privileged) break; // only allow in privileged code
1979 return _method_ForceInline;
1980 }
1981 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
1982 if (_location != _in_method) break; // only allow for methods
1983 if (!privileged) break; // only allow in privileged code
1984 return _method_DontInline;
1985 }
1986 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1987 if (_location != _in_method) break; // only allow for methods
1988 if (!privileged) break; // only allow in privileged code
1989 return _method_InjectedProfile;
1990 }
1991 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
1992 if (_location != _in_method) break; // only allow for methods
1993 if (!privileged) break; // only allow in privileged code
1994 return _method_LambdaForm_Compiled;
1995 }
1996 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
1997 if (_location != _in_method) break; // only allow for methods
1998 if (!privileged) break; // only allow in privileged code
1999 return _method_LambdaForm_Hidden;
2000 }
2001 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2002 if (_location != _in_method) break; // only allow for methods
2003 if (!privileged) break; // only allow in privileged code
2004 return _method_HotSpotIntrinsicCandidate;
2005 }
2006 #if INCLUDE_JVMCI
2007 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_vm_ci_hotspot_Stable_signature): {
2008 if (_location != _in_field) break; // only allow for fields
2009 if (!privileged) break; // only allow in privileged code
2010 return _field_Stable;
2011 }
2012 #endif
2013 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2014 if (_location != _in_field) break; // only allow for fields
2015 if (!privileged) break; // only allow in privileged code
2016 return _field_Stable;
2017 }
2018 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2019 if (_location != _in_field && _location != _in_class) {
2020 break; // only allow for fields and classes
2021 }
2022 if (!EnableContended || (RestrictContended && !privileged)) {
2023 break; // honor privileges
2024 }
2025 return _jdk_internal_vm_annotation_Contended;
2026 }
2027 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2028 if (_location != _in_method) break; // only allow for methods
2029 if (RestrictReservedStack && !privileged) break; // honor privileges
2030 return _jdk_internal_vm_annotation_ReservedStackAccess;
2031 }
2032 default: {
2033 break;
2034 }
2035 }
2036 return AnnotationCollector::_unknown;
2037 }
2038
2039 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2040 if (is_contended())
2041 f->set_contended_group(contended_group());
2042 if (is_stable())
2043 f->set_stable(true);
2044 }
2045
2046 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2047 // If there's an error deallocate metadata for field annotations
2048 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2049 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2050 }
2051
2052 void MethodAnnotationCollector::apply_to(methodHandle m) {
2053 if (has_annotation(_method_CallerSensitive))
2054 m->set_caller_sensitive(true);
2055 if (has_annotation(_method_ForceInline))
2056 m->set_force_inline(true);
2057 if (has_annotation(_method_DontInline))
2058 m->set_dont_inline(true);
2059 if (has_annotation(_method_InjectedProfile))
2060 m->set_has_injected_profile(true);
2061 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2062 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2063 if (has_annotation(_method_LambdaForm_Hidden))
2064 m->set_hidden(true);
2065 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2066 m->set_intrinsic_candidate(true);
2067 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2068 m->set_has_reserved_stack_access(true);
2069 }
2070
2071 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2072 assert(ik != NULL, "invariant");
2073 ik->set_is_contended(is_contended());
2074 }
2075
2076 #define MAX_ARGS_SIZE 255
2077 #define MAX_CODE_SIZE 65535
2078 #define INITIAL_MAX_LVT_NUMBER 256
2079
2080 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2081 *
2082 * Rules for LVT's and LVTT's are:
2083 * - There can be any number of LVT's and LVTT's.
2084 * - If there are n LVT's, it is the same as if there was just
2085 * one LVT containing all the entries from the n LVT's.
2086 * - There may be no more than one LVT entry per local variable.
2087 * Two LVT entries are 'equal' if these fields are the same:
2088 * start_pc, length, name, slot
2089 * - There may be no more than one LVTT entry per each LVT entry.
2090 * Each LVTT entry has to match some LVT entry.
2091 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2092 */
2093 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2094 int lvt_cnt,
2095 u2* const localvariable_table_length,
2096 const u2**const localvariable_table_start,
2097 int lvtt_cnt,
2098 u2* const localvariable_type_table_length,
2099 const u2**const localvariable_type_table_start,
2100 TRAPS) {
2101
2102 ResourceMark rm(THREAD);
2103
2104 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2105 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2106
2107 LVT_HashTable* const table = new LVT_HashTable();
2108
2109 // To fill LocalVariableTable in
2110 const Classfile_LVT_Element* cf_lvt;
2111 LocalVariableTableElement* lvt = cm->localvariable_table_start();
2112
2113 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2114 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2115 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2116 copy_lvt_element(&cf_lvt[idx], lvt);
2117 // If no duplicates, add LVT elem in hashtable.
2118 if (table->put(*lvt, lvt) == false
2119 && _need_verify
2120 && _major_version >= JAVA_1_5_VERSION) {
2121 classfile_parse_error("Duplicated LocalVariableTable attribute "
2122 "entry for '%s' in class file %s",
2123 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2124 CHECK);
2125 }
2126 }
2127 }
2128
2129 // To merge LocalVariableTable and LocalVariableTypeTable
2130 const Classfile_LVT_Element* cf_lvtt;
2131 LocalVariableTableElement lvtt_elem;
2132
2133 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2134 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2135 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2136 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2137 LocalVariableTableElement** entry = table->get(lvtt_elem);
2138 if (entry == NULL) {
2139 if (_need_verify) {
2140 classfile_parse_error("LVTT entry for '%s' in class file %s "
2141 "does not match any LVT entry",
2142 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2143 CHECK);
2144 }
2145 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2146 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2147 "entry for '%s' in class file %s",
2148 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2149 CHECK);
2150 } else {
2151 // to add generic signatures into LocalVariableTable
2152 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2153 }
2154 }
2155 }
2156 }
2157
2158
2159 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2160 const u1* runtime_visible_annotations,
2161 int runtime_visible_annotations_length,
2162 const u1* runtime_invisible_annotations,
2163 int runtime_invisible_annotations_length,
2164 const u1* runtime_visible_parameter_annotations,
2165 int runtime_visible_parameter_annotations_length,
2166 const u1* runtime_invisible_parameter_annotations,
2167 int runtime_invisible_parameter_annotations_length,
2168 const u1* runtime_visible_type_annotations,
2169 int runtime_visible_type_annotations_length,
2170 const u1* runtime_invisible_type_annotations,
2171 int runtime_invisible_type_annotations_length,
2172 const u1* annotation_default,
2173 int annotation_default_length,
2174 TRAPS) {
2175
2176 AnnotationArray* a;
2177
2178 if (runtime_visible_annotations_length +
2179 runtime_invisible_annotations_length > 0) {
2180 a = assemble_annotations(runtime_visible_annotations,
2181 runtime_visible_annotations_length,
2182 runtime_invisible_annotations,
2183 runtime_invisible_annotations_length,
2184 CHECK);
2185 cm->set_method_annotations(a);
2186 }
2187
2188 if (runtime_visible_parameter_annotations_length +
2189 runtime_invisible_parameter_annotations_length > 0) {
2190 a = assemble_annotations(runtime_visible_parameter_annotations,
2191 runtime_visible_parameter_annotations_length,
2192 runtime_invisible_parameter_annotations,
2193 runtime_invisible_parameter_annotations_length,
2194 CHECK);
2195 cm->set_parameter_annotations(a);
2196 }
2197
2198 if (annotation_default_length > 0) {
2199 a = assemble_annotations(annotation_default,
2200 annotation_default_length,
2201 NULL,
2202 0,
2203 CHECK);
2204 cm->set_default_annotations(a);
2205 }
2206
2207 if (runtime_visible_type_annotations_length +
2208 runtime_invisible_type_annotations_length > 0) {
2209 a = assemble_annotations(runtime_visible_type_annotations,
2210 runtime_visible_type_annotations_length,
2211 runtime_invisible_type_annotations,
2212 runtime_invisible_type_annotations_length,
2213 CHECK);
2214 cm->set_type_annotations(a);
2215 }
2216 }
2217
2218
2219 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2220 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2221 // Method* to save footprint, so we only know the size of the resulting Method* when the
2222 // entire method attribute is parsed.
2223 //
2224 // The promoted_flags parameter is used to pass relevant access_flags
2225 // from the method back up to the containing klass. These flag values
2226 // are added to klass's access_flags.
2227
2228 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2229 bool is_interface,
2230 const ConstantPool* cp,
2231 AccessFlags* const promoted_flags,
2232 TRAPS) {
2233 assert(cfs != NULL, "invariant");
2234 assert(cp != NULL, "invariant");
2235 assert(promoted_flags != NULL, "invariant");
2236
2237 ResourceMark rm(THREAD);
2238 // Parse fixed parts:
2239 // access_flags, name_index, descriptor_index, attributes_count
2240 cfs->guarantee_more(8, CHECK_NULL);
2241
2242 int flags = cfs->get_u2_fast();
2243 const u2 name_index = cfs->get_u2_fast();
2244 const int cp_size = cp->length();
2245 check_property(
2246 valid_symbol_at(name_index),
2247 "Illegal constant pool index %u for method name in class file %s",
2248 name_index, CHECK_NULL);
2249 const Symbol* const name = cp->symbol_at(name_index);
2250 verify_legal_method_name(name, CHECK_NULL);
2251
2252 const u2 signature_index = cfs->get_u2_fast();
2253 guarantee_property(
2254 valid_symbol_at(signature_index),
2255 "Illegal constant pool index %u for method signature in class file %s",
2256 signature_index, CHECK_NULL);
2257 const Symbol* const signature = cp->symbol_at(signature_index);
2258
2259 if (name == vmSymbols::class_initializer_name()) {
2260 // We ignore the other access flags for a valid class initializer.
2261 // (JVM Spec 2nd ed., chapter 4.6)
2262 if (_major_version < 51) { // backward compatibility
2263 flags = JVM_ACC_STATIC;
2264 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2265 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2266 } else {
2267 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2268 }
2269 } else {
2270 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2271 }
2272
2273 if (name == vmSymbols::object_initializer_name() && is_interface) {
2274 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2275 }
2276
2277 int args_size = -1; // only used when _need_verify is true
2278 if (_need_verify) {
2279 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2280 verify_legal_method_signature(name, signature, CHECK_NULL);
2281 if (args_size > MAX_ARGS_SIZE) {
2282 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2283 }
2284 }
2285
2286 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2287
2288 // Default values for code and exceptions attribute elements
2289 u2 max_stack = 0;
2290 u2 max_locals = 0;
2291 u4 code_length = 0;
2292 const u1* code_start = 0;
2293 u2 exception_table_length = 0;
2294 const u2* exception_table_start = NULL;
2295 Array<int>* exception_handlers = Universe::the_empty_int_array();
2296 u2 checked_exceptions_length = 0;
2297 const u2* checked_exceptions_start = NULL;
2298 CompressedLineNumberWriteStream* linenumber_table = NULL;
2299 int linenumber_table_length = 0;
2300 int total_lvt_length = 0;
2301 u2 lvt_cnt = 0;
2302 u2 lvtt_cnt = 0;
2303 bool lvt_allocated = false;
2304 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2305 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2306 u2* localvariable_table_length = NULL;
2307 const u2** localvariable_table_start = NULL;
2308 u2* localvariable_type_table_length = NULL;
2309 const u2** localvariable_type_table_start = NULL;
2310 int method_parameters_length = -1;
2311 const u1* method_parameters_data = NULL;
2312 bool method_parameters_seen = false;
2313 bool parsed_code_attribute = false;
2314 bool parsed_checked_exceptions_attribute = false;
2315 bool parsed_stackmap_attribute = false;
2316 // stackmap attribute - JDK1.5
2317 const u1* stackmap_data = NULL;
2318 int stackmap_data_length = 0;
2319 u2 generic_signature_index = 0;
2320 MethodAnnotationCollector parsed_annotations;
2321 const u1* runtime_visible_annotations = NULL;
2322 int runtime_visible_annotations_length = 0;
2323 const u1* runtime_invisible_annotations = NULL;
2324 int runtime_invisible_annotations_length = 0;
2325 const u1* runtime_visible_parameter_annotations = NULL;
2326 int runtime_visible_parameter_annotations_length = 0;
2327 const u1* runtime_invisible_parameter_annotations = NULL;
2328 int runtime_invisible_parameter_annotations_length = 0;
2329 const u1* runtime_visible_type_annotations = NULL;
2330 int runtime_visible_type_annotations_length = 0;
2331 const u1* runtime_invisible_type_annotations = NULL;
2332 int runtime_invisible_type_annotations_length = 0;
2333 bool runtime_invisible_annotations_exists = false;
2334 bool runtime_invisible_type_annotations_exists = false;
2335 bool runtime_invisible_parameter_annotations_exists = false;
2336 const u1* annotation_default = NULL;
2337 int annotation_default_length = 0;
2338
2339 // Parse code and exceptions attribute
2340 u2 method_attributes_count = cfs->get_u2_fast();
2341 while (method_attributes_count--) {
2342 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length
2343 const u2 method_attribute_name_index = cfs->get_u2_fast();
2344 const u4 method_attribute_length = cfs->get_u4_fast();
2345 check_property(
2346 valid_symbol_at(method_attribute_name_index),
2347 "Invalid method attribute name index %u in class file %s",
2348 method_attribute_name_index, CHECK_NULL);
2349
2350 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2351 if (method_attribute_name == vmSymbols::tag_code()) {
2352 // Parse Code attribute
2353 if (_need_verify) {
2354 guarantee_property(
2355 !access_flags.is_native() && !access_flags.is_abstract(),
2356 "Code attribute in native or abstract methods in class file %s",
2357 CHECK_NULL);
2358 }
2359 if (parsed_code_attribute) {
2360 classfile_parse_error("Multiple Code attributes in class file %s",
2361 CHECK_NULL);
2362 }
2363 parsed_code_attribute = true;
2364
2365 // Stack size, locals size, and code size
2366 if (_major_version == 45 && _minor_version <= 2) {
2367 cfs->guarantee_more(4, CHECK_NULL);
2368 max_stack = cfs->get_u1_fast();
2369 max_locals = cfs->get_u1_fast();
2370 code_length = cfs->get_u2_fast();
2371 } else {
2372 cfs->guarantee_more(8, CHECK_NULL);
2373 max_stack = cfs->get_u2_fast();
2374 max_locals = cfs->get_u2_fast();
2375 code_length = cfs->get_u4_fast();
2376 }
2377 if (_need_verify) {
2378 guarantee_property(args_size <= max_locals,
2379 "Arguments can't fit into locals in class file %s",
2380 CHECK_NULL);
2381 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2382 "Invalid method Code length %u in class file %s",
2383 code_length, CHECK_NULL);
2384 }
2385 // Code pointer
2386 code_start = cfs->get_u1_buffer();
2387 assert(code_start != NULL, "null code start");
2388 cfs->guarantee_more(code_length, CHECK_NULL);
2389 cfs->skip_u1_fast(code_length);
2390
2391 // Exception handler table
2392 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
2393 exception_table_length = cfs->get_u2_fast();
2394 if (exception_table_length > 0) {
2395 exception_table_start = parse_exception_table(cfs,
2396 code_length,
2397 exception_table_length,
2398 CHECK_NULL);
2399 }
2400
2401 // Parse additional attributes in code attribute
2402 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count
2403 u2 code_attributes_count = cfs->get_u2_fast();
2404
2405 unsigned int calculated_attribute_length = 0;
2406
2407 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2408 calculated_attribute_length =
2409 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2410 } else {
2411 // max_stack, locals and length are smaller in pre-version 45.2 classes
2412 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2413 }
2414 calculated_attribute_length +=
2415 code_length +
2416 sizeof(exception_table_length) +
2417 sizeof(code_attributes_count) +
2418 exception_table_length *
2419 ( sizeof(u2) + // start_pc
2420 sizeof(u2) + // end_pc
2421 sizeof(u2) + // handler_pc
2422 sizeof(u2) ); // catch_type_index
2423
2424 while (code_attributes_count--) {
2425 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length
2426 const u2 code_attribute_name_index = cfs->get_u2_fast();
2427 const u4 code_attribute_length = cfs->get_u4_fast();
2428 calculated_attribute_length += code_attribute_length +
2429 sizeof(code_attribute_name_index) +
2430 sizeof(code_attribute_length);
2431 check_property(valid_symbol_at(code_attribute_name_index),
2432 "Invalid code attribute name index %u in class file %s",
2433 code_attribute_name_index,
2434 CHECK_NULL);
2435 if (LoadLineNumberTables &&
2436 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2437 // Parse and compress line number table
2438 parse_linenumber_table(code_attribute_length,
2439 code_length,
2440 &linenumber_table,
2441 CHECK_NULL);
2442
2443 } else if (LoadLocalVariableTables &&
2444 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2445 // Parse local variable table
2446 if (!lvt_allocated) {
2447 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2448 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2449 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2450 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2451 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2452 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2453 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2454 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2455 lvt_allocated = true;
2456 }
2457 if (lvt_cnt == max_lvt_cnt) {
2458 max_lvt_cnt <<= 1;
2459 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2460 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2461 }
2462 localvariable_table_start[lvt_cnt] =
2463 parse_localvariable_table(cfs,
2464 code_length,
2465 max_locals,
2466 code_attribute_length,
2467 &localvariable_table_length[lvt_cnt],
2468 false, // is not LVTT
2469 CHECK_NULL);
2470 total_lvt_length += localvariable_table_length[lvt_cnt];
2471 lvt_cnt++;
2472 } else if (LoadLocalVariableTypeTables &&
2473 _major_version >= JAVA_1_5_VERSION &&
2474 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2475 if (!lvt_allocated) {
2476 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2477 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2478 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2479 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2480 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2481 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2482 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2483 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2484 lvt_allocated = true;
2485 }
2486 // Parse local variable type table
2487 if (lvtt_cnt == max_lvtt_cnt) {
2488 max_lvtt_cnt <<= 1;
2489 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2490 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2491 }
2492 localvariable_type_table_start[lvtt_cnt] =
2493 parse_localvariable_table(cfs,
2494 code_length,
2495 max_locals,
2496 code_attribute_length,
2497 &localvariable_type_table_length[lvtt_cnt],
2498 true, // is LVTT
2499 CHECK_NULL);
2500 lvtt_cnt++;
2501 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2502 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2503 // Stack map is only needed by the new verifier in JDK1.5.
2504 if (parsed_stackmap_attribute) {
2505 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2506 }
2507 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2508 stackmap_data_length = code_attribute_length;
2509 parsed_stackmap_attribute = true;
2510 } else {
2511 // Skip unknown attributes
2512 cfs->skip_u1(code_attribute_length, CHECK_NULL);
2513 }
2514 }
2515 // check method attribute length
2516 if (_need_verify) {
2517 guarantee_property(method_attribute_length == calculated_attribute_length,
2518 "Code segment has wrong length in class file %s",
2519 CHECK_NULL);
2520 }
2521 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2522 // Parse Exceptions attribute
2523 if (parsed_checked_exceptions_attribute) {
2524 classfile_parse_error("Multiple Exceptions attributes in class file %s",
2525 CHECK_NULL);
2526 }
2527 parsed_checked_exceptions_attribute = true;
2528 checked_exceptions_start =
2529 parse_checked_exceptions(cfs,
2530 &checked_exceptions_length,
2531 method_attribute_length,
2532 CHECK_NULL);
2533 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2534 // reject multiple method parameters
2535 if (method_parameters_seen) {
2536 classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2537 CHECK_NULL);
2538 }
2539 method_parameters_seen = true;
2540 method_parameters_length = cfs->get_u1_fast();
2541 const u2 real_length = (method_parameters_length * 4u) + 1u;
2542 if (method_attribute_length != real_length) {
2543 classfile_parse_error(
2544 "Invalid MethodParameters method attribute length %u in class file",
2545 method_attribute_length, CHECK_NULL);
2546 }
2547 method_parameters_data = cfs->get_u1_buffer();
2548 cfs->skip_u2_fast(method_parameters_length);
2549 cfs->skip_u2_fast(method_parameters_length);
2550 // ignore this attribute if it cannot be reflected
2551 if (!SystemDictionary::Parameter_klass_loaded())
2552 method_parameters_length = -1;
2553 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2554 if (method_attribute_length != 0) {
2555 classfile_parse_error(
2556 "Invalid Synthetic method attribute length %u in class file %s",
2557 method_attribute_length, CHECK_NULL);
2558 }
2559 // Should we check that there hasn't already been a synthetic attribute?
2560 access_flags.set_is_synthetic();
2561 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2562 if (method_attribute_length != 0) {
2563 classfile_parse_error(
2564 "Invalid Deprecated method attribute length %u in class file %s",
2565 method_attribute_length, CHECK_NULL);
2566 }
2567 } else if (_major_version >= JAVA_1_5_VERSION) {
2568 if (method_attribute_name == vmSymbols::tag_signature()) {
2569 if (method_attribute_length != 2) {
2570 classfile_parse_error(
2571 "Invalid Signature attribute length %u in class file %s",
2572 method_attribute_length, CHECK_NULL);
2573 }
2574 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2575 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2576 if (runtime_visible_annotations != NULL) {
2577 classfile_parse_error(
2578 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2579 CHECK_NULL);
2580 }
2581 runtime_visible_annotations_length = method_attribute_length;
2582 runtime_visible_annotations = cfs->get_u1_buffer();
2583 assert(runtime_visible_annotations != NULL, "null visible annotations");
2584 parse_annotations(cp,
2585 runtime_visible_annotations,
2586 runtime_visible_annotations_length,
2587 &parsed_annotations,
2588 _loader_data,
2589 CHECK_NULL);
2590 cfs->skip_u1(runtime_visible_annotations_length, CHECK_NULL);
2591 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2592 if (runtime_invisible_annotations_exists) {
2593 classfile_parse_error(
2594 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2595 CHECK_NULL);
2596 }
2597 runtime_invisible_annotations_exists = true;
2598 if (PreserveAllAnnotations) {
2599 runtime_invisible_annotations_length = method_attribute_length;
2600 runtime_invisible_annotations = cfs->get_u1_buffer();
2601 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2602 }
2603 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2604 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2605 if (runtime_visible_parameter_annotations != NULL) {
2606 classfile_parse_error(
2607 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2608 CHECK_NULL);
2609 }
2610 runtime_visible_parameter_annotations_length = method_attribute_length;
2611 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2612 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2613 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2614 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2615 if (runtime_invisible_parameter_annotations_exists) {
2616 classfile_parse_error(
2617 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2618 CHECK_NULL);
2619 }
2620 runtime_invisible_parameter_annotations_exists = true;
2621 if (PreserveAllAnnotations) {
2622 runtime_invisible_parameter_annotations_length = method_attribute_length;
2623 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2624 assert(runtime_invisible_parameter_annotations != NULL,
2625 "null invisible parameter annotations");
2626 }
2627 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2628 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2629 if (annotation_default != NULL) {
2630 classfile_parse_error(
2631 "Multiple AnnotationDefault attributes for method in class file %s",
2632 CHECK_NULL);
2633 }
2634 annotation_default_length = method_attribute_length;
2635 annotation_default = cfs->get_u1_buffer();
2636 assert(annotation_default != NULL, "null annotation default");
2637 cfs->skip_u1(annotation_default_length, CHECK_NULL);
2638 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2639 if (runtime_visible_type_annotations != NULL) {
2640 classfile_parse_error(
2641 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2642 CHECK_NULL);
2643 }
2644 runtime_visible_type_annotations_length = method_attribute_length;
2645 runtime_visible_type_annotations = cfs->get_u1_buffer();
2646 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2647 // No need for the VM to parse Type annotations
2648 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2649 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2650 if (runtime_invisible_type_annotations_exists) {
2651 classfile_parse_error(
2652 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2653 CHECK_NULL);
2654 } else {
2655 runtime_invisible_type_annotations_exists = true;
2656 }
2657 if (PreserveAllAnnotations) {
2658 runtime_invisible_type_annotations_length = method_attribute_length;
2659 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2660 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2661 }
2662 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2663 } else {
2664 // Skip unknown attributes
2665 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2666 }
2667 } else {
2668 // Skip unknown attributes
2669 cfs->skip_u1(method_attribute_length, CHECK_NULL);
2670 }
2671 }
2672
2673 if (linenumber_table != NULL) {
2674 linenumber_table->write_terminator();
2675 linenumber_table_length = linenumber_table->position();
2676 }
2677
2678 // Make sure there's at least one Code attribute in non-native/non-abstract method
2679 if (_need_verify) {
2680 guarantee_property(access_flags.is_native() ||
2681 access_flags.is_abstract() ||
2682 parsed_code_attribute,
2683 "Absent Code attribute in method that is not native or abstract in class file %s",
2684 CHECK_NULL);
2685 }
2686
2687 // All sizing information for a Method* is finally available, now create it
2688 InlineTableSizes sizes(
2689 total_lvt_length,
2690 linenumber_table_length,
2691 exception_table_length,
2692 checked_exceptions_length,
2693 method_parameters_length,
2694 generic_signature_index,
2695 runtime_visible_annotations_length +
2696 runtime_invisible_annotations_length,
2697 runtime_visible_parameter_annotations_length +
2698 runtime_invisible_parameter_annotations_length,
2699 runtime_visible_type_annotations_length +
2700 runtime_invisible_type_annotations_length,
2701 annotation_default_length,
2702 0);
2703
2704 Method* const m = Method::allocate(_loader_data,
2705 code_length,
2706 access_flags,
2707 &sizes,
2708 ConstMethod::NORMAL,
2709 CHECK_NULL);
2710
2711 ClassLoadingService::add_class_method_size(m->size()*wordSize);
2712
2713 // Fill in information from fixed part (access_flags already set)
2714 m->set_constants(_cp);
2715 m->set_name_index(name_index);
2716 m->set_signature_index(signature_index);
2717 #ifdef CC_INTERP
2718 // hmm is there a gc issue here??
2719 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2720 m->set_result_index(rtf.type());
2721 #endif
2722
2723 if (args_size >= 0) {
2724 m->set_size_of_parameters(args_size);
2725 } else {
2726 m->compute_size_of_parameters(THREAD);
2727 }
2728 #ifdef ASSERT
2729 if (args_size >= 0) {
2730 m->compute_size_of_parameters(THREAD);
2731 assert(args_size == m->size_of_parameters(), "");
2732 }
2733 #endif
2734
2735 // Fill in code attribute information
2736 m->set_max_stack(max_stack);
2737 m->set_max_locals(max_locals);
2738 if (stackmap_data != NULL) {
2739 m->constMethod()->copy_stackmap_data(_loader_data,
2740 (u1*)stackmap_data,
2741 stackmap_data_length,
2742 CHECK_NULL);
2743 }
2744
2745 // Copy byte codes
2746 m->set_code((u1*)code_start);
2747
2748 // Copy line number table
2749 if (linenumber_table != NULL) {
2750 memcpy(m->compressed_linenumber_table(),
2751 linenumber_table->buffer(),
2752 linenumber_table_length);
2753 }
2754
2755 // Copy exception table
2756 if (exception_table_length > 0) {
2757 int size =
2758 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2759 copy_u2_with_conversion((u2*) m->exception_table_start(),
2760 exception_table_start, size);
2761 }
2762
2763 // Copy method parameters
2764 if (method_parameters_length > 0) {
2765 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2766 for (int i = 0; i < method_parameters_length; i++) {
2767 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2768 method_parameters_data += 2;
2769 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2770 method_parameters_data += 2;
2771 }
2772 }
2773
2774 // Copy checked exceptions
2775 if (checked_exceptions_length > 0) {
2776 const int size =
2777 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2778 copy_u2_with_conversion((u2*) m->checked_exceptions_start(),
2779 checked_exceptions_start,
2780 size);
2781 }
2782
2783 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2784 if (total_lvt_length > 0) {
2785 promoted_flags->set_has_localvariable_table();
2786 copy_localvariable_table(m->constMethod(),
2787 lvt_cnt,
2788 localvariable_table_length,
2789 localvariable_table_start,
2790 lvtt_cnt,
2791 localvariable_type_table_length,
2792 localvariable_type_table_start,
2793 CHECK_NULL);
2794 }
2795
2796 if (parsed_annotations.has_any_annotations())
2797 parsed_annotations.apply_to(m);
2798
2799 // Copy annotations
2800 copy_method_annotations(m->constMethod(),
2801 runtime_visible_annotations,
2802 runtime_visible_annotations_length,
2803 runtime_invisible_annotations,
2804 runtime_invisible_annotations_length,
2805 runtime_visible_parameter_annotations,
2806 runtime_visible_parameter_annotations_length,
2807 runtime_invisible_parameter_annotations,
2808 runtime_invisible_parameter_annotations_length,
2809 runtime_visible_type_annotations,
2810 runtime_visible_type_annotations_length,
2811 runtime_invisible_type_annotations,
2812 runtime_invisible_type_annotations_length,
2813 annotation_default,
2814 annotation_default_length,
2815 CHECK_NULL);
2816
2817 if (name == vmSymbols::finalize_method_name() &&
2818 signature == vmSymbols::void_method_signature()) {
2819 if (m->is_empty_method()) {
2820 _has_empty_finalizer = true;
2821 } else {
2822 _has_finalizer = true;
2823 }
2824 }
2825 if (name == vmSymbols::object_initializer_name() &&
2826 signature == vmSymbols::void_method_signature() &&
2827 m->is_vanilla_constructor()) {
2828 _has_vanilla_constructor = true;
2829 }
2830
2831 NOT_PRODUCT(m->verify());
2832 return m;
2833 }
2834
2835
2836 // The promoted_flags parameter is used to pass relevant access_flags
2837 // from the methods back up to the containing klass. These flag values
2838 // are added to klass's access_flags.
2839 // Side-effects: populates the _methods field in the parser
2840 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2841 bool is_interface,
2842 AccessFlags* promoted_flags,
2843 bool* has_final_method,
2844 bool* declares_default_methods,
2845 TRAPS) {
2846 assert(cfs != NULL, "invariant");
2847 assert(promoted_flags != NULL, "invariant");
2848 assert(has_final_method != NULL, "invariant");
2849 assert(declares_default_methods != NULL, "invariant");
2850
2851 assert(NULL == _methods, "invariant");
2852
2853 cfs->guarantee_more(2, CHECK); // length
2854 const u2 length = cfs->get_u2_fast();
2855 if (length == 0) {
2856 _methods = Universe::the_empty_method_array();
2857 } else {
2858 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2859 length,
2860 NULL,
2861 CHECK);
2862
2863 HandleMark hm(THREAD);
2864 for (int index = 0; index < length; index++) {
2865 Method* method = parse_method(cfs,
2866 is_interface,
2867 _cp,
2868 promoted_flags,
2869 CHECK);
2870
2871 if (method->is_final()) {
2872 *has_final_method = true;
2873 }
2874 // declares_default_methods: declares concrete instance methods, any access flags
2875 // used for interface initialization, and default method inheritance analysis
2876 if (is_interface && !(*declares_default_methods)
2877 && !method->is_abstract() && !method->is_static()) {
2878 *declares_default_methods = true;
2879 }
2880 _methods->at_put(index, method);
2881 }
2882
2883 if (_need_verify && length > 1) {
2884 // Check duplicated methods
2885 ResourceMark rm(THREAD);
2886 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2887 THREAD, NameSigHash*, HASH_ROW_SIZE);
2888 initialize_hashtable(names_and_sigs);
2889 bool dup = false;
2890 {
2891 debug_only(NoSafepointVerifier nsv;)
2892 for (int i = 0; i < length; i++) {
2893 const Method* const m = _methods->at(i);
2894 // If no duplicates, add name/signature in hashtable names_and_sigs.
2895 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2896 dup = true;
2897 break;
2898 }
2899 }
2900 }
2901 if (dup) {
2902 classfile_parse_error("Duplicate method name&signature in class file %s",
2903 CHECK);
2904 }
2905 }
2906 }
2907 }
2908
2909 static const intArray* sort_methods(Array<Method*>* methods) {
2910 const int length = methods->length();
2911 // If JVMTI original method ordering or sharing is enabled we have to
2912 // remember the original class file ordering.
2913 // We temporarily use the vtable_index field in the Method* to store the
2914 // class file index, so we can read in after calling qsort.
2915 // Put the method ordering in the shared archive.
2916 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2917 for (int index = 0; index < length; index++) {
2918 Method* const m = methods->at(index);
2919 assert(!m->valid_vtable_index(), "vtable index should not be set");
2920 m->set_vtable_index(index);
2921 }
2922 }
2923 // Sort method array by ascending method name (for faster lookups & vtable construction)
2924 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2925 Method::sort_methods(methods);
2926
2927 intArray* method_ordering = NULL;
2928 // If JVMTI original method ordering or sharing is enabled construct int
2929 // array remembering the original ordering
2930 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2931 method_ordering = new intArray(length);
2932 for (int index = 0; index < length; index++) {
2933 Method* const m = methods->at(index);
2934 const int old_index = m->vtable_index();
2935 assert(old_index >= 0 && old_index < length, "invalid method index");
2936 method_ordering->at_put(index, old_index);
2937 m->set_vtable_index(Method::invalid_vtable_index);
2938 }
2939 }
2940 return method_ordering;
2941 }
2942
2943 // Parse generic_signature attribute for methods and fields
2944 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2945 TRAPS) {
2946 assert(cfs != NULL, "invariant");
2947
2948 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2949 const u2 generic_signature_index = cfs->get_u2_fast();
2950 check_property(
2951 valid_symbol_at(generic_signature_index),
2952 "Invalid Signature attribute at constant pool index %u in class file %s",
2953 generic_signature_index, CHECK_0);
2954 return generic_signature_index;
2955 }
2956
2957 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2958 TRAPS) {
2959
2960 assert(cfs != NULL, "invariant");
2961
2962 cfs->guarantee_more(2, CHECK); // sourcefile_index
2963 const u2 sourcefile_index = cfs->get_u2_fast();
2964 check_property(
2965 valid_symbol_at(sourcefile_index),
2966 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2967 sourcefile_index, CHECK);
2968 set_class_sourcefile_index(sourcefile_index);
2969 }
2970
2971 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2972 int length,
2973 TRAPS) {
2974 assert(cfs != NULL, "invariant");
2975
2976 const u1* const sde_buffer = cfs->get_u1_buffer();
2977 assert(sde_buffer != NULL, "null sde buffer");
2978
2979 // Don't bother storing it if there is no way to retrieve it
2980 if (JvmtiExport::can_get_source_debug_extension()) {
2981 assert((length+1) > length, "Overflow checking");
2982 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2983 for (int i = 0; i < length; i++) {
2984 sde[i] = sde_buffer[i];
2985 }
2986 sde[length] = '\0';
2987 set_class_sde_buffer((const char*)sde, length);
2988 }
2989 // Got utf8 string, set stream position forward
2990 cfs->skip_u1(length, CHECK);
2991 }
2992
2993
2994 // Inner classes can be static, private or protected (classic VM does this)
2995 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
2996 JVM_ACC_PRIVATE | \
2997 JVM_ACC_PROTECTED | \
2998 JVM_ACC_STATIC \
2999 )
3000
3001 // Return number of classes in the inner classes attribute table
3002 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3003 const u1* const inner_classes_attribute_start,
3004 bool parsed_enclosingmethod_attribute,
3005 u2 enclosing_method_class_index,
3006 u2 enclosing_method_method_index,
3007 TRAPS) {
3008 const u1* const current_mark = cfs->current();
3009 u2 length = 0;
3010 if (inner_classes_attribute_start != NULL) {
3011 cfs->set_current(inner_classes_attribute_start);
3012 cfs->guarantee_more(2, CHECK_0); // length
3013 length = cfs->get_u2_fast();
3014 }
3015
3016 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3017 // method data:
3018 // [inner_class_info_index,
3019 // outer_class_info_index,
3020 // inner_name_index,
3021 // inner_class_access_flags,
3022 // ...
3023 // enclosing_method_class_index,
3024 // enclosing_method_method_index]
3025 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3026 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3027 _inner_classes = inner_classes;
3028
3029 int index = 0;
3030 const int cp_size = _cp->length();
3031 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
3032 for (int n = 0; n < length; n++) {
3033 // Inner class index
3034 const u2 inner_class_info_index = cfs->get_u2_fast();
3035 check_property(
3036 valid_klass_reference_at(inner_class_info_index),
3037 "inner_class_info_index %u has bad constant type in class file %s",
3038 inner_class_info_index, CHECK_0);
3039 // Outer class index
3040 const u2 outer_class_info_index = cfs->get_u2_fast();
3041 check_property(
3042 outer_class_info_index == 0 ||
3043 valid_klass_reference_at(outer_class_info_index),
3044 "outer_class_info_index %u has bad constant type in class file %s",
3045 outer_class_info_index, CHECK_0);
3046 // Inner class name
3047 const u2 inner_name_index = cfs->get_u2_fast();
3048 check_property(
3049 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3050 "inner_name_index %u has bad constant type in class file %s",
3051 inner_name_index, CHECK_0);
3052 if (_need_verify) {
3053 guarantee_property(inner_class_info_index != outer_class_info_index,
3054 "Class is both outer and inner class in class file %s", CHECK_0);
3055 }
3056 // Access flags
3057 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3058 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3059 // Set abstract bit for old class files for backward compatibility
3060 flags |= JVM_ACC_ABSTRACT;
3061 }
3062 verify_legal_class_modifiers(flags, CHECK_0);
3063 AccessFlags inner_access_flags(flags);
3064
3065 inner_classes->at_put(index++, inner_class_info_index);
3066 inner_classes->at_put(index++, outer_class_info_index);
3067 inner_classes->at_put(index++, inner_name_index);
3068 inner_classes->at_put(index++, inner_access_flags.as_short());
3069 }
3070
3071 // 4347400: make sure there's no duplicate entry in the classes array
3072 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3073 for(int i = 0; i < length * 4; i += 4) {
3074 for(int j = i + 4; j < length * 4; j += 4) {
3075 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
3076 inner_classes->at(i+1) != inner_classes->at(j+1) ||
3077 inner_classes->at(i+2) != inner_classes->at(j+2) ||
3078 inner_classes->at(i+3) != inner_classes->at(j+3)),
3079 "Duplicate entry in InnerClasses in class file %s",
3080 CHECK_0);
3081 }
3082 }
3083 }
3084
3085 // Set EnclosingMethod class and method indexes.
3086 if (parsed_enclosingmethod_attribute) {
3087 inner_classes->at_put(index++, enclosing_method_class_index);
3088 inner_classes->at_put(index++, enclosing_method_method_index);
3089 }
3090 assert(index == size, "wrong size");
3091
3092 // Restore buffer's current position.
3093 cfs->set_current(current_mark);
3094
3095 return length;
3096 }
3097
3098 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3099 set_class_synthetic_flag(true);
3100 }
3101
3102 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3103 assert(cfs != NULL, "invariant");
3104
3105 const u2 signature_index = cfs->get_u2(CHECK);
3106 check_property(
3107 valid_symbol_at(signature_index),
3108 "Invalid constant pool index %u in Signature attribute in class file %s",
3109 signature_index, CHECK);
3110 set_class_generic_signature_index(signature_index);
3111 }
3112
3113 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3114 ConstantPool* cp,
3115 u4 attribute_byte_length,
3116 TRAPS) {
3117 assert(cfs != NULL, "invariant");
3118 assert(cp != NULL, "invariant");
3119
3120 const u1* const current_start = cfs->current();
3121
3122 guarantee_property(attribute_byte_length >= sizeof(u2),
3123 "Invalid BootstrapMethods attribute length %u in class file %s",
3124 attribute_byte_length,
3125 CHECK);
3126
3127 cfs->guarantee_more(attribute_byte_length, CHECK);
3128
3129 const int attribute_array_length = cfs->get_u2_fast();
3130
3131 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3132 "Short length on BootstrapMethods in class file %s",
3133 CHECK);
3134
3135
3136 // The attribute contains a counted array of counted tuples of shorts,
3137 // represending bootstrap specifiers:
3138 // length*{bootstrap_method_index, argument_count*{argument_index}}
3139 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3140 // operand_count = number of shorts in attr, except for leading length
3141
3142 // The attribute is copied into a short[] array.
3143 // The array begins with a series of short[2] pairs, one for each tuple.
3144 const int index_size = (attribute_array_length * 2);
3145
3146 Array<u2>* const operands =
3147 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3148
3149 // Eagerly assign operands so they will be deallocated with the constant
3150 // pool if there is an error.
3151 cp->set_operands(operands);
3152
3153 int operand_fill_index = index_size;
3154 const int cp_size = cp->length();
3155
3156 for (int n = 0; n < attribute_array_length; n++) {
3157 // Store a 32-bit offset into the header of the operand array.
3158 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3159
3160 // Read a bootstrap specifier.
3161 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
3162 const u2 bootstrap_method_index = cfs->get_u2_fast();
3163 const u2 argument_count = cfs->get_u2_fast();
3164 check_property(
3165 valid_cp_range(bootstrap_method_index, cp_size) &&
3166 cp->tag_at(bootstrap_method_index).is_method_handle(),
3167 "bootstrap_method_index %u has bad constant type in class file %s",
3168 bootstrap_method_index,
3169 CHECK);
3170
3171 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3172 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3173 CHECK);
3174
3175 operands->at_put(operand_fill_index++, bootstrap_method_index);
3176 operands->at_put(operand_fill_index++, argument_count);
3177
3178 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
3179 for (int j = 0; j < argument_count; j++) {
3180 const u2 argument_index = cfs->get_u2_fast();
3181 check_property(
3182 valid_cp_range(argument_index, cp_size) &&
3183 cp->tag_at(argument_index).is_loadable_constant(),
3184 "argument_index %u has bad constant type in class file %s",
3185 argument_index,
3186 CHECK);
3187 operands->at_put(operand_fill_index++, argument_index);
3188 }
3189 }
3190 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3191 "Bad length on BootstrapMethods in class file %s",
3192 CHECK);
3193 }
3194
3195 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3196 ConstantPool* cp,
3197 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3198 TRAPS) {
3199 assert(cfs != NULL, "invariant");
3200 assert(cp != NULL, "invariant");
3201 assert(parsed_annotations != NULL, "invariant");
3202
3203 // Set inner classes attribute to default sentinel
3204 _inner_classes = Universe::the_empty_short_array();
3205 cfs->guarantee_more(2, CHECK); // attributes_count
3206 u2 attributes_count = cfs->get_u2_fast();
3207 bool parsed_sourcefile_attribute = false;
3208 bool parsed_innerclasses_attribute = false;
3209 bool parsed_enclosingmethod_attribute = false;
3210 bool parsed_bootstrap_methods_attribute = false;
3211 const u1* runtime_visible_annotations = NULL;
3212 int runtime_visible_annotations_length = 0;
3213 const u1* runtime_invisible_annotations = NULL;
3214 int runtime_invisible_annotations_length = 0;
3215 const u1* runtime_visible_type_annotations = NULL;
3216 int runtime_visible_type_annotations_length = 0;
3217 const u1* runtime_invisible_type_annotations = NULL;
3218 int runtime_invisible_type_annotations_length = 0;
3219 bool runtime_invisible_type_annotations_exists = false;
3220 bool runtime_invisible_annotations_exists = false;
3221 bool parsed_source_debug_ext_annotations_exist = false;
3222 const u1* inner_classes_attribute_start = NULL;
3223 u4 inner_classes_attribute_length = 0;
3224 u2 enclosing_method_class_index = 0;
3225 u2 enclosing_method_method_index = 0;
3226 // Iterate over attributes
3227 while (attributes_count--) {
3228 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3229 const u2 attribute_name_index = cfs->get_u2_fast();
3230 const u4 attribute_length = cfs->get_u4_fast();
3231 check_property(
3232 valid_symbol_at(attribute_name_index),
3233 "Attribute name has bad constant pool index %u in class file %s",
3234 attribute_name_index, CHECK);
3235 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3236 if (tag == vmSymbols::tag_source_file()) {
3237 // Check for SourceFile tag
3238 if (_need_verify) {
3239 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3240 }
3241 if (parsed_sourcefile_attribute) {
3242 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3243 } else {
3244 parsed_sourcefile_attribute = true;
3245 }
3246 parse_classfile_sourcefile_attribute(cfs, CHECK);
3247 } else if (tag == vmSymbols::tag_source_debug_extension()) {
3248 // Check for SourceDebugExtension tag
3249 if (parsed_source_debug_ext_annotations_exist) {
3250 classfile_parse_error(
3251 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3252 }
3253 parsed_source_debug_ext_annotations_exist = true;
3254 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3255 } else if (tag == vmSymbols::tag_inner_classes()) {
3256 // Check for InnerClasses tag
3257 if (parsed_innerclasses_attribute) {
3258 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3259 } else {
3260 parsed_innerclasses_attribute = true;
3261 }
3262 inner_classes_attribute_start = cfs->get_u1_buffer();
3263 inner_classes_attribute_length = attribute_length;
3264 cfs->skip_u1(inner_classes_attribute_length, CHECK);
3265 } else if (tag == vmSymbols::tag_synthetic()) {
3266 // Check for Synthetic tag
3267 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3268 if (attribute_length != 0) {
3269 classfile_parse_error(
3270 "Invalid Synthetic classfile attribute length %u in class file %s",
3271 attribute_length, CHECK);
3272 }
3273 parse_classfile_synthetic_attribute(CHECK);
3274 } else if (tag == vmSymbols::tag_deprecated()) {
3275 // Check for Deprecatd tag - 4276120
3276 if (attribute_length != 0) {
3277 classfile_parse_error(
3278 "Invalid Deprecated classfile attribute length %u in class file %s",
3279 attribute_length, CHECK);
3280 }
3281 } else if (_major_version >= JAVA_1_5_VERSION) {
3282 if (tag == vmSymbols::tag_signature()) {
3283 if (attribute_length != 2) {
3284 classfile_parse_error(
3285 "Wrong Signature attribute length %u in class file %s",
3286 attribute_length, CHECK);
3287 }
3288 parse_classfile_signature_attribute(cfs, CHECK);
3289 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3290 if (runtime_visible_annotations != NULL) {
3291 classfile_parse_error(
3292 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3293 }
3294 runtime_visible_annotations_length = attribute_length;
3295 runtime_visible_annotations = cfs->get_u1_buffer();
3296 assert(runtime_visible_annotations != NULL, "null visible annotations");
3297 parse_annotations(cp,
3298 runtime_visible_annotations,
3299 runtime_visible_annotations_length,
3300 parsed_annotations,
3301 _loader_data,
3302 CHECK);
3303 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
3304 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3305 if (runtime_invisible_annotations_exists) {
3306 classfile_parse_error(
3307 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3308 }
3309 runtime_invisible_annotations_exists = true;
3310 if (PreserveAllAnnotations) {
3311 runtime_invisible_annotations_length = attribute_length;
3312 runtime_invisible_annotations = cfs->get_u1_buffer();
3313 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3314 }
3315 cfs->skip_u1(attribute_length, CHECK);
3316 } else if (tag == vmSymbols::tag_enclosing_method()) {
3317 if (parsed_enclosingmethod_attribute) {
3318 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3319 } else {
3320 parsed_enclosingmethod_attribute = true;
3321 }
3322 guarantee_property(attribute_length == 4,
3323 "Wrong EnclosingMethod attribute length %u in class file %s",
3324 attribute_length, CHECK);
3325 cfs->guarantee_more(4, CHECK); // class_index, method_index
3326 enclosing_method_class_index = cfs->get_u2_fast();
3327 enclosing_method_method_index = cfs->get_u2_fast();
3328 if (enclosing_method_class_index == 0) {
3329 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3330 }
3331 // Validate the constant pool indices and types
3332 check_property(valid_klass_reference_at(enclosing_method_class_index),
3333 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3334 if (enclosing_method_method_index != 0 &&
3335 (!cp->is_within_bounds(enclosing_method_method_index) ||
3336 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3337 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3338 }
3339 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3340 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3341 if (parsed_bootstrap_methods_attribute)
3342 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3343 parsed_bootstrap_methods_attribute = true;
3344 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3345 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3346 if (runtime_visible_type_annotations != NULL) {
3347 classfile_parse_error(
3348 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3349 }
3350 runtime_visible_type_annotations_length = attribute_length;
3351 runtime_visible_type_annotations = cfs->get_u1_buffer();
3352 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3353 // No need for the VM to parse Type annotations
3354 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3355 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3356 if (runtime_invisible_type_annotations_exists) {
3357 classfile_parse_error(
3358 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3359 } else {
3360 runtime_invisible_type_annotations_exists = true;
3361 }
3362 if (PreserveAllAnnotations) {
3363 runtime_invisible_type_annotations_length = attribute_length;
3364 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3365 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3366 }
3367 cfs->skip_u1(attribute_length, CHECK);
3368 } else {
3369 // Unknown attribute
3370 cfs->skip_u1(attribute_length, CHECK);
3371 }
3372 } else {
3373 // Unknown attribute
3374 cfs->skip_u1(attribute_length, CHECK);
3375 }
3376 }
3377 _annotations = assemble_annotations(runtime_visible_annotations,
3378 runtime_visible_annotations_length,
3379 runtime_invisible_annotations,
3380 runtime_invisible_annotations_length,
3381 CHECK);
3382 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3383 runtime_visible_type_annotations_length,
3384 runtime_invisible_type_annotations,
3385 runtime_invisible_type_annotations_length,
3386 CHECK);
3387
3388 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3389 const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3390 cfs,
3391 inner_classes_attribute_start,
3392 parsed_innerclasses_attribute,
3393 enclosing_method_class_index,
3394 enclosing_method_method_index,
3395 CHECK);
3396 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3397 guarantee_property(
3398 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3399 "Wrong InnerClasses attribute length in class file %s", CHECK);
3400 }
3401 }
3402
3403 if (_max_bootstrap_specifier_index >= 0) {
3404 guarantee_property(parsed_bootstrap_methods_attribute,
3405 "Missing BootstrapMethods attribute in class file %s", CHECK);
3406 }
3407 }
3408
3409 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3410 assert(k != NULL, "invariant");
3411
3412 if (_synthetic_flag)
3413 k->set_is_synthetic();
3414 if (_sourcefile_index != 0) {
3415 k->set_source_file_name_index(_sourcefile_index);
3416 }
3417 if (_generic_signature_index != 0) {
3418 k->set_generic_signature_index(_generic_signature_index);
3419 }
3420 if (_sde_buffer != NULL) {
3421 k->set_source_debug_extension(_sde_buffer, _sde_length);
3422 }
3423 }
3424
3425 // Create the Annotations object that will
3426 // hold the annotations array for the Klass.
3427 void ClassFileParser::create_combined_annotations(TRAPS) {
3428 if (_annotations == NULL &&
3429 _type_annotations == NULL &&
3430 _fields_annotations == NULL &&
3431 _fields_type_annotations == NULL) {
3432 // Don't create the Annotations object unnecessarily.
3433 return;
3434 }
3435
3436 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3437 annotations->set_class_annotations(_annotations);
3438 annotations->set_class_type_annotations(_type_annotations);
3439 annotations->set_fields_annotations(_fields_annotations);
3440 annotations->set_fields_type_annotations(_fields_type_annotations);
3441
3442 // This is the Annotations object that will be
3443 // assigned to InstanceKlass being constructed.
3444 _combined_annotations = annotations;
3445
3446 // The annotations arrays below has been transfered the
3447 // _combined_annotations so these fields can now be cleared.
3448 _annotations = NULL;
3449 _type_annotations = NULL;
3450 _fields_annotations = NULL;
3451 _fields_type_annotations = NULL;
3452 }
3453
3454 // Transfer ownership of metadata allocated to the InstanceKlass.
3455 void ClassFileParser::apply_parsed_class_metadata(
3456 InstanceKlass* this_klass,
3457 int java_fields_count, TRAPS) {
3458 assert(this_klass != NULL, "invariant");
3459
3460 _cp->set_pool_holder(this_klass);
3461 this_klass->set_constants(_cp);
3462 this_klass->set_fields(_fields, java_fields_count);
3463 this_klass->set_methods(_methods);
3464 this_klass->set_inner_classes(_inner_classes);
3465 this_klass->set_local_interfaces(_local_interfaces);
3466 this_klass->set_transitive_interfaces(_transitive_interfaces);
3467 this_klass->set_annotations(_combined_annotations);
3468
3469 // Clear out these fields so they don't get deallocated by the destructor
3470 clear_class_metadata();
3471 }
3472
3473 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3474 int runtime_visible_annotations_length,
3475 const u1* const runtime_invisible_annotations,
3476 int runtime_invisible_annotations_length,
3477 TRAPS) {
3478 AnnotationArray* annotations = NULL;
3479 if (runtime_visible_annotations != NULL ||
3480 runtime_invisible_annotations != NULL) {
3481 annotations = MetadataFactory::new_array<u1>(_loader_data,
3482 runtime_visible_annotations_length +
3483 runtime_invisible_annotations_length,
3484 CHECK_(annotations));
3485 if (runtime_visible_annotations != NULL) {
3486 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3487 annotations->at_put(i, runtime_visible_annotations[i]);
3488 }
3489 }
3490 if (runtime_invisible_annotations != NULL) {
3491 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3492 int append = runtime_visible_annotations_length+i;
3493 annotations->at_put(append, runtime_invisible_annotations[i]);
3494 }
3495 }
3496 }
3497 return annotations;
3498 }
3499
3500 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3501 const int super_class_index,
3502 const bool need_verify,
3503 TRAPS) {
3504 assert(cp != NULL, "invariant");
3505 const InstanceKlass* super_klass = NULL;
3506
3507 if (super_class_index == 0) {
3508 check_property(_class_name == vmSymbols::java_lang_Object(),
3509 "Invalid superclass index %u in class file %s",
3510 super_class_index,
3511 CHECK_NULL);
3512 } else {
3513 check_property(valid_klass_reference_at(super_class_index),
3514 "Invalid superclass index %u in class file %s",
3515 super_class_index,
3516 CHECK_NULL);
3517 // The class name should be legal because it is checked when parsing constant pool.
3518 // However, make sure it is not an array type.
3519 bool is_array = false;
3520 if (cp->tag_at(super_class_index).is_klass()) {
3521 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3522 if (need_verify)
3523 is_array = super_klass->is_array_klass();
3524 } else if (need_verify) {
3525 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3526 }
3527 if (need_verify) {
3528 guarantee_property(!is_array,
3529 "Bad superclass name in class file %s", CHECK_NULL);
3530 }
3531 }
3532 return super_klass;
3533 }
3534
3535 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3536 unsigned int nonstatic_oop_map_count,
3537 int first_nonstatic_oop_offset) {
3538
3539 unsigned int map_count =
3540 NULL == super ? 0 : super->nonstatic_oop_map_count();
3541 if (nonstatic_oop_map_count > 0) {
3542 // We have oops to add to map
3543 if (map_count == 0) {
3544 map_count = nonstatic_oop_map_count;
3545 }
3546 else {
3547 // Check whether we should add a new map block or whether the last one can
3548 // be extended
3549 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3550 const OopMapBlock* const last_map = first_map + map_count - 1;
3551
3552 const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3553 if (next_offset == first_nonstatic_oop_offset) {
3554 // There is no gap bettwen superklass's last oop field and first
3555 // local oop field, merge maps.
3556 nonstatic_oop_map_count -= 1;
3557 }
3558 else {
3559 // Superklass didn't end with a oop field, add extra maps
3560 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3561 }
3562 map_count += nonstatic_oop_map_count;
3563 }
3564 }
3565 return map_count;
3566 }
3567
3568 #ifndef PRODUCT
3569 static void print_field_layout(const Symbol* name,
3570 Array<u2>* fields,
3571 constantPoolHandle cp,
3572 int instance_size,
3573 int instance_fields_start,
3574 int instance_fields_end,
3575 int static_fields_end) {
3576
3577 assert(name != NULL, "invariant");
3578
3579 tty->print("%s: field layout\n", name->as_klass_external_name());
3580 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3581 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3582 if (!fs.access_flags().is_static()) {
3583 tty->print(" @%3d \"%s\" %s\n",
3584 fs.offset(),
3585 fs.name()->as_klass_external_name(),
3586 fs.signature()->as_klass_external_name());
3587 }
3588 }
3589 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3590 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3591 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3592 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3593 if (fs.access_flags().is_static()) {
3594 tty->print(" @%3d \"%s\" %s\n",
3595 fs.offset(),
3596 fs.name()->as_klass_external_name(),
3597 fs.signature()->as_klass_external_name());
3598 }
3599 }
3600 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
3601 tty->print("\n");
3602 }
3603 #endif
3604
3605 // Values needed for oopmap and InstanceKlass creation
3606 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3607 public:
3608 int* nonstatic_oop_offsets;
3609 unsigned int* nonstatic_oop_counts;
3610 unsigned int nonstatic_oop_map_count;
3611 unsigned int total_oop_map_count;
3612 int instance_size;
3613 int nonstatic_field_size;
3614 int static_field_size;
3615 bool has_nonstatic_fields;
3616 };
3617
3618 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3619 void ClassFileParser::layout_fields(ConstantPool* cp,
3620 const FieldAllocationCount* fac,
3621 const ClassAnnotationCollector* parsed_annotations,
3622 FieldLayoutInfo* info,
3623 TRAPS) {
3624
3625 assert(cp != NULL, "invariant");
3626
3627 // Field size and offset computation
3628 int nonstatic_field_size = _super_klass == NULL ? 0 :
3629 _super_klass->nonstatic_field_size();
3630
3631 // Count the contended fields by type.
3632 //
3633 // We ignore static fields, because @Contended is not supported for them.
3634 // The layout code below will also ignore the static fields.
3635 int nonstatic_contended_count = 0;
3636 FieldAllocationCount fac_contended;
3637 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3638 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3639 if (fs.is_contended()) {
3640 fac_contended.count[atype]++;
3641 if (!fs.access_flags().is_static()) {
3642 nonstatic_contended_count++;
3643 }
3644 }
3645 }
3646
3647
3648 // Calculate the starting byte offsets
3649 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3650 int next_static_double_offset = next_static_oop_offset +
3651 ((fac->count[STATIC_OOP]) * heapOopSize);
3652 if ( fac->count[STATIC_DOUBLE] &&
3653 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3654 Universe::field_type_should_be_aligned(T_LONG)) ) {
3655 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3656 }
3657
3658 int next_static_word_offset = next_static_double_offset +
3659 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3660 int next_static_short_offset = next_static_word_offset +
3661 ((fac->count[STATIC_WORD]) * BytesPerInt);
3662 int next_static_byte_offset = next_static_short_offset +
3663 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3664
3665 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3666 nonstatic_field_size * heapOopSize;
3667
3668 int next_nonstatic_field_offset = nonstatic_fields_start;
3669
3670 const bool is_contended_class = parsed_annotations->is_contended();
3671
3672 // Class is contended, pad before all the fields
3673 if (is_contended_class) {
3674 next_nonstatic_field_offset += ContendedPaddingWidth;
3675 }
3676
3677 // Compute the non-contended fields count.
3678 // The packing code below relies on these counts to determine if some field
3679 // can be squeezed into the alignment gap. Contended fields are obviously
3680 // exempt from that.
3681 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3682 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3683 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3684 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3685 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3686
3687 // Total non-static fields count, including every contended field
3688 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3689 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3690 fac->count[NONSTATIC_OOP];
3691
3692 const bool super_has_nonstatic_fields =
3693 (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3694 const bool has_nonstatic_fields =
3695 super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3696
3697
3698 // Prepare list of oops for oop map generation.
3699 //
3700 // "offset" and "count" lists are describing the set of contiguous oop
3701 // regions. offset[i] is the start of the i-th region, which then has
3702 // count[i] oops following. Before we know how many regions are required,
3703 // we pessimistically allocate the maps to fit all the oops into the
3704 // distinct regions.
3705 //
3706 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3707 // to figure out if we still need to do this.
3708 unsigned int nonstatic_oop_map_count = 0;
3709 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3710
3711 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3712 THREAD, int, max_nonstatic_oop_maps);
3713 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3714 THREAD, unsigned int, max_nonstatic_oop_maps);
3715
3716 int first_nonstatic_oop_offset = 0; // will be set for first oop field
3717
3718 bool compact_fields = CompactFields;
3719 int allocation_style = FieldsAllocationStyle;
3720 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3721 assert(false, "0 <= FieldsAllocationStyle <= 2");
3722 allocation_style = 1; // Optimistic
3723 }
3724
3725 // The next classes have predefined hard-coded fields offsets
3726 // (see in JavaClasses::compute_hard_coded_offsets()).
3727 // Use default fields allocation order for them.
3728 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3729 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3730 _class_name == vmSymbols::java_lang_Class() ||
3731 _class_name == vmSymbols::java_lang_ClassLoader() ||
3732 _class_name == vmSymbols::java_lang_ref_Reference() ||
3733 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3734 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3735 _class_name == vmSymbols::java_lang_String() ||
3736 _class_name == vmSymbols::java_lang_Throwable() ||
3737 _class_name == vmSymbols::java_lang_Boolean() ||
3738 _class_name == vmSymbols::java_lang_Character() ||
3739 _class_name == vmSymbols::java_lang_Float() ||
3740 _class_name == vmSymbols::java_lang_Double() ||
3741 _class_name == vmSymbols::java_lang_Byte() ||
3742 _class_name == vmSymbols::java_lang_Short() ||
3743 _class_name == vmSymbols::java_lang_Integer() ||
3744 _class_name == vmSymbols::java_lang_Long())) {
3745 allocation_style = 0; // Allocate oops first
3746 compact_fields = false; // Don't compact fields
3747 }
3748
3749 int next_nonstatic_oop_offset = 0;
3750 int next_nonstatic_double_offset = 0;
3751
3752 // Rearrange fields for a given allocation style
3753 if( allocation_style == 0 ) {
3754 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3755 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3756 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3757 (nonstatic_oop_count * heapOopSize);
3758 } else if( allocation_style == 1 ) {
3759 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3760 next_nonstatic_double_offset = next_nonstatic_field_offset;
3761 } else if( allocation_style == 2 ) {
3762 // Fields allocation: oops fields in super and sub classes are together.
3763 if( nonstatic_field_size > 0 && _super_klass != NULL &&
3764 _super_klass->nonstatic_oop_map_size() > 0 ) {
3765 const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3766 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3767 const OopMapBlock* const last_map = first_map + map_count - 1;
3768 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3769 if (next_offset == next_nonstatic_field_offset) {
3770 allocation_style = 0; // allocate oops first
3771 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3772 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3773 (nonstatic_oop_count * heapOopSize);
3774 }
3775 }
3776 if( allocation_style == 2 ) {
3777 allocation_style = 1; // allocate oops last
3778 next_nonstatic_double_offset = next_nonstatic_field_offset;
3779 }
3780 } else {
3781 ShouldNotReachHere();
3782 }
3783
3784 int nonstatic_oop_space_count = 0;
3785 int nonstatic_word_space_count = 0;
3786 int nonstatic_short_space_count = 0;
3787 int nonstatic_byte_space_count = 0;
3788 int nonstatic_oop_space_offset = 0;
3789 int nonstatic_word_space_offset = 0;
3790 int nonstatic_short_space_offset = 0;
3791 int nonstatic_byte_space_offset = 0;
3792
3793 // Try to squeeze some of the fields into the gaps due to
3794 // long/double alignment.
3795 if (nonstatic_double_count > 0) {
3796 int offset = next_nonstatic_double_offset;
3797 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3798 if (compact_fields && offset != next_nonstatic_double_offset) {
3799 // Allocate available fields into the gap before double field.
3800 int length = next_nonstatic_double_offset - offset;
3801 assert(length == BytesPerInt, "");
3802 nonstatic_word_space_offset = offset;
3803 if (nonstatic_word_count > 0) {
3804 nonstatic_word_count -= 1;
3805 nonstatic_word_space_count = 1; // Only one will fit
3806 length -= BytesPerInt;
3807 offset += BytesPerInt;
3808 }
3809 nonstatic_short_space_offset = offset;
3810 while (length >= BytesPerShort && nonstatic_short_count > 0) {
3811 nonstatic_short_count -= 1;
3812 nonstatic_short_space_count += 1;
3813 length -= BytesPerShort;
3814 offset += BytesPerShort;
3815 }
3816 nonstatic_byte_space_offset = offset;
3817 while (length > 0 && nonstatic_byte_count > 0) {
3818 nonstatic_byte_count -= 1;
3819 nonstatic_byte_space_count += 1;
3820 length -= 1;
3821 }
3822 // Allocate oop field in the gap if there are no other fields for that.
3823 nonstatic_oop_space_offset = offset;
3824 if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3825 allocation_style != 0) { // when oop fields not first
3826 nonstatic_oop_count -= 1;
3827 nonstatic_oop_space_count = 1; // Only one will fit
3828 length -= heapOopSize;
3829 offset += heapOopSize;
3830 }
3831 }
3832 }
3833
3834 int next_nonstatic_word_offset = next_nonstatic_double_offset +
3835 (nonstatic_double_count * BytesPerLong);
3836 int next_nonstatic_short_offset = next_nonstatic_word_offset +
3837 (nonstatic_word_count * BytesPerInt);
3838 int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3839 (nonstatic_short_count * BytesPerShort);
3840 int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3841 nonstatic_byte_count;
3842
3843 // let oops jump before padding with this allocation style
3844 if( allocation_style == 1 ) {
3845 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3846 if( nonstatic_oop_count > 0 ) {
3847 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3848 }
3849 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3850 }
3851
3852 // Iterate over fields again and compute correct offsets.
3853 // The field allocation type was temporarily stored in the offset slot.
3854 // oop fields are located before non-oop fields (static and non-static).
3855 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3856
3857 // skip already laid out fields
3858 if (fs.is_offset_set()) continue;
3859
3860 // contended instance fields are handled below
3861 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3862
3863 int real_offset = 0;
3864 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3865
3866 // pack the rest of the fields
3867 switch (atype) {
3868 case STATIC_OOP:
3869 real_offset = next_static_oop_offset;
3870 next_static_oop_offset += heapOopSize;
3871 break;
3872 case STATIC_BYTE:
3873 real_offset = next_static_byte_offset;
3874 next_static_byte_offset += 1;
3875 break;
3876 case STATIC_SHORT:
3877 real_offset = next_static_short_offset;
3878 next_static_short_offset += BytesPerShort;
3879 break;
3880 case STATIC_WORD:
3881 real_offset = next_static_word_offset;
3882 next_static_word_offset += BytesPerInt;
3883 break;
3884 case STATIC_DOUBLE:
3885 real_offset = next_static_double_offset;
3886 next_static_double_offset += BytesPerLong;
3887 break;
3888 case NONSTATIC_OOP:
3889 if( nonstatic_oop_space_count > 0 ) {
3890 real_offset = nonstatic_oop_space_offset;
3891 nonstatic_oop_space_offset += heapOopSize;
3892 nonstatic_oop_space_count -= 1;
3893 } else {
3894 real_offset = next_nonstatic_oop_offset;
3895 next_nonstatic_oop_offset += heapOopSize;
3896 }
3897
3898 // Record this oop in the oop maps
3899 if( nonstatic_oop_map_count > 0 &&
3900 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3901 real_offset -
3902 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3903 heapOopSize ) {
3904 // This oop is adjacent to the previous one, add to current oop map
3905 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3906 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3907 } else {
3908 // This oop is not adjacent to the previous one, create new oop map
3909 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3910 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3911 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3912 nonstatic_oop_map_count += 1;
3913 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3914 first_nonstatic_oop_offset = real_offset;
3915 }
3916 }
3917 break;
3918 case NONSTATIC_BYTE:
3919 if( nonstatic_byte_space_count > 0 ) {
3920 real_offset = nonstatic_byte_space_offset;
3921 nonstatic_byte_space_offset += 1;
3922 nonstatic_byte_space_count -= 1;
3923 } else {
3924 real_offset = next_nonstatic_byte_offset;
3925 next_nonstatic_byte_offset += 1;
3926 }
3927 break;
3928 case NONSTATIC_SHORT:
3929 if( nonstatic_short_space_count > 0 ) {
3930 real_offset = nonstatic_short_space_offset;
3931 nonstatic_short_space_offset += BytesPerShort;
3932 nonstatic_short_space_count -= 1;
3933 } else {
3934 real_offset = next_nonstatic_short_offset;
3935 next_nonstatic_short_offset += BytesPerShort;
3936 }
3937 break;
3938 case NONSTATIC_WORD:
3939 if( nonstatic_word_space_count > 0 ) {
3940 real_offset = nonstatic_word_space_offset;
3941 nonstatic_word_space_offset += BytesPerInt;
3942 nonstatic_word_space_count -= 1;
3943 } else {
3944 real_offset = next_nonstatic_word_offset;
3945 next_nonstatic_word_offset += BytesPerInt;
3946 }
3947 break;
3948 case NONSTATIC_DOUBLE:
3949 real_offset = next_nonstatic_double_offset;
3950 next_nonstatic_double_offset += BytesPerLong;
3951 break;
3952 default:
3953 ShouldNotReachHere();
3954 }
3955 fs.set_offset(real_offset);
3956 }
3957
3958
3959 // Handle the contended cases.
3960 //
3961 // Each contended field should not intersect the cache line with another contended field.
3962 // In the absence of alignment information, we end up with pessimistically separating
3963 // the fields with full-width padding.
3964 //
3965 // Additionally, this should not break alignment for the fields, so we round the alignment up
3966 // for each field.
3967 if (nonstatic_contended_count > 0) {
3968
3969 // if there is at least one contended field, we need to have pre-padding for them
3970 next_nonstatic_padded_offset += ContendedPaddingWidth;
3971
3972 // collect all contended groups
3973 BitMap bm(cp->size());
3974 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3975 // skip already laid out fields
3976 if (fs.is_offset_set()) continue;
3977
3978 if (fs.is_contended()) {
3979 bm.set_bit(fs.contended_group());
3980 }
3981 }
3982
3983 int current_group = -1;
3984 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3985
3986 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3987
3988 // skip already laid out fields
3989 if (fs.is_offset_set()) continue;
3990
3991 // skip non-contended fields and fields from different group
3992 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3993
3994 // handle statics below
3995 if (fs.access_flags().is_static()) continue;
3996
3997 int real_offset = 0;
3998 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3999
4000 switch (atype) {
4001 case NONSTATIC_BYTE:
4002 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
4003 real_offset = next_nonstatic_padded_offset;
4004 next_nonstatic_padded_offset += 1;
4005 break;
4006
4007 case NONSTATIC_SHORT:
4008 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
4009 real_offset = next_nonstatic_padded_offset;
4010 next_nonstatic_padded_offset += BytesPerShort;
4011 break;
4012
4013 case NONSTATIC_WORD:
4014 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4015 real_offset = next_nonstatic_padded_offset;
4016 next_nonstatic_padded_offset += BytesPerInt;
4017 break;
4018
4019 case NONSTATIC_DOUBLE:
4020 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4021 real_offset = next_nonstatic_padded_offset;
4022 next_nonstatic_padded_offset += BytesPerLong;
4023 break;
4024
4025 case NONSTATIC_OOP:
4026 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4027 real_offset = next_nonstatic_padded_offset;
4028 next_nonstatic_padded_offset += heapOopSize;
4029
4030 // Record this oop in the oop maps
4031 if( nonstatic_oop_map_count > 0 &&
4032 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4033 real_offset -
4034 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4035 heapOopSize ) {
4036 // This oop is adjacent to the previous one, add to current oop map
4037 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4038 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4039 } else {
4040 // This oop is not adjacent to the previous one, create new oop map
4041 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4042 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4043 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4044 nonstatic_oop_map_count += 1;
4045 if( first_nonstatic_oop_offset == 0 ) { // Undefined
4046 first_nonstatic_oop_offset = real_offset;
4047 }
4048 }
4049 break;
4050
4051 default:
4052 ShouldNotReachHere();
4053 }
4054
4055 if (fs.contended_group() == 0) {
4056 // Contended group defines the equivalence class over the fields:
4057 // the fields within the same contended group are not inter-padded.
4058 // The only exception is default group, which does not incur the
4059 // equivalence, and so requires intra-padding.
4060 next_nonstatic_padded_offset += ContendedPaddingWidth;
4061 }
4062
4063 fs.set_offset(real_offset);
4064 } // for
4065
4066 // Start laying out the next group.
4067 // Note that this will effectively pad the last group in the back;
4068 // this is expected to alleviate memory contention effects for
4069 // subclass fields and/or adjacent object.
4070 // If this was the default group, the padding is already in place.
4071 if (current_group != 0) {
4072 next_nonstatic_padded_offset += ContendedPaddingWidth;
4073 }
4074 }
4075
4076 // handle static fields
4077 }
4078
4079 // Entire class is contended, pad in the back.
4080 // This helps to alleviate memory contention effects for subclass fields
4081 // and/or adjacent object.
4082 if (is_contended_class) {
4083 next_nonstatic_padded_offset += ContendedPaddingWidth;
4084 }
4085
4086 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4087
4088 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
4089 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4090 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
4091
4092 int static_field_size = (static_fields_end -
4093 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4094 nonstatic_field_size = nonstatic_field_size +
4095 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4096
4097 int instance_size = align_object_size(instance_end / wordSize);
4098
4099 assert(instance_size == align_object_size(align_size_up(
4100 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4101 wordSize) / wordSize), "consistent layout helper value");
4102
4103 // Invariant: nonstatic_field end/start should only change if there are
4104 // nonstatic fields in the class, or if the class is contended. We compare
4105 // against the non-aligned value, so that end alignment will not fail the
4106 // assert without actually having the fields.
4107 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4108 is_contended_class ||
4109 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4110
4111 // Number of non-static oop map blocks allocated at end of klass.
4112 const unsigned int total_oop_map_count =
4113 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4114 first_nonstatic_oop_offset);
4115
4116 #ifndef PRODUCT
4117 if (PrintFieldLayout) {
4118 print_field_layout(_class_name,
4119 _fields,
4120 cp,
4121 instance_size,
4122 nonstatic_fields_start,
4123 nonstatic_fields_end,
4124 static_fields_end);
4125 }
4126
4127 #endif
4128 // Pass back information needed for InstanceKlass creation
4129 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4130 info->nonstatic_oop_counts = nonstatic_oop_counts;
4131 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4132 info->total_oop_map_count = total_oop_map_count;
4133 info->instance_size = instance_size;
4134 info->static_field_size = static_field_size;
4135 info->nonstatic_field_size = nonstatic_field_size;
4136 info->has_nonstatic_fields = has_nonstatic_fields;
4137 }
4138
4139 static void fill_oop_maps(const InstanceKlass* k,
4140 unsigned int nonstatic_oop_map_count,
4141 const int* nonstatic_oop_offsets,
4142 const unsigned int* nonstatic_oop_counts) {
4143
4144 assert(k != NULL, "invariant");
4145
4146 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4147 const InstanceKlass* const super = k->superklass();
4148 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4149 if (super_count > 0) {
4150 // Copy maps from superklass
4151 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4152 for (unsigned int i = 0; i < super_count; ++i) {
4153 *this_oop_map++ = *super_oop_map++;
4154 }
4155 }
4156
4157 if (nonstatic_oop_map_count > 0) {
4158 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4159 // The counts differ because there is no gap between superklass's last oop
4160 // field and the first local oop field. Extend the last oop map copied
4161 // from the superklass instead of creating new one.
4162 nonstatic_oop_map_count--;
4163 nonstatic_oop_offsets++;
4164 this_oop_map--;
4165 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4166 this_oop_map++;
4167 }
4168
4169 // Add new map blocks, fill them
4170 while (nonstatic_oop_map_count-- > 0) {
4171 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4172 this_oop_map->set_count(*nonstatic_oop_counts++);
4173 this_oop_map++;
4174 }
4175 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4176 this_oop_map, "sanity");
4177 }
4178 }
4179
4180
4181 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4182 assert(ik != NULL, "invariant");
4183
4184 const Klass* const super = ik->super();
4185
4186 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4187 // in which case we don't have to register objects as finalizable
4188 if (!_has_empty_finalizer) {
4189 if (_has_finalizer ||
4190 (super != NULL && super->has_finalizer())) {
4191 ik->set_has_finalizer();
4192 }
4193 }
4194
4195 #ifdef ASSERT
4196 bool f = false;
4197 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4198 vmSymbols::void_method_signature());
4199 if (m != NULL && !m->is_empty_method()) {
4200 f = true;
4201 }
4202
4203 // Spec doesn't prevent agent from redefinition of empty finalizer.
4204 // Despite the fact that it's generally bad idea and redefined finalizer
4205 // will not work as expected we shouldn't abort vm in this case
4206 if (!ik->has_redefined_this_or_super()) {
4207 assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4208 }
4209 #endif
4210
4211 // Check if this klass supports the java.lang.Cloneable interface
4212 if (SystemDictionary::Cloneable_klass_loaded()) {
4213 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4214 ik->set_is_cloneable();
4215 }
4216 }
4217
4218 // Check if this klass has a vanilla default constructor
4219 if (super == NULL) {
4220 // java.lang.Object has empty default constructor
4221 ik->set_has_vanilla_constructor();
4222 } else {
4223 if (super->has_vanilla_constructor() &&
4224 _has_vanilla_constructor) {
4225 ik->set_has_vanilla_constructor();
4226 }
4227 #ifdef ASSERT
4228 bool v = false;
4229 if (super->has_vanilla_constructor()) {
4230 const Method* const constructor =
4231 ik->find_method(vmSymbols::object_initializer_name(),
4232 vmSymbols::void_method_signature());
4233 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4234 v = true;
4235 }
4236 }
4237 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4238 #endif
4239 }
4240
4241 // If it cannot be fast-path allocated, set a bit in the layout helper.
4242 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4243 assert(ik->size_helper() > 0, "layout_helper is initialized");
4244 if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4245 || ik->is_abstract() || ik->is_interface()
4246 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4247 || ik->size_helper() >= FastAllocateSizeLimit) {
4248 // Forbid fast-path allocation.
4249 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4250 ik->set_layout_helper(lh);
4251 }
4252 }
4253
4254 // Attach super classes and interface classes to class loader data
4255 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4256 TRAPS) {
4257 assert(defined_klass != NULL, "invariant");
4258
4259 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4260 if (defining_loader_data->is_the_null_class_loader_data()) {
4261 // Dependencies to null class loader data are implicit.
4262 return;
4263 } else {
4264 // add super class dependency
4265 Klass* const super = defined_klass->super();
4266 if (super != NULL) {
4267 defining_loader_data->record_dependency(super, CHECK);
4268 }
4269
4270 // add super interface dependencies
4271 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4272 if (local_interfaces != NULL) {
4273 const int length = local_interfaces->length();
4274 for (int i = 0; i < length; i++) {
4275 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4276 }
4277 }
4278 }
4279 }
4280
4281 // utility methods for appending an array with check for duplicates
4282
4283 static void append_interfaces(GrowableArray<Klass*>* result,
4284 const Array<Klass*>* const ifs) {
4285 // iterate over new interfaces
4286 for (int i = 0; i < ifs->length(); i++) {
4287 Klass* const e = ifs->at(i);
4288 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4289 // add new interface
4290 result->append_if_missing(e);
4291 }
4292 }
4293
4294 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4295 Array<Klass*>* local_ifs,
4296 ClassLoaderData* loader_data,
4297 TRAPS) {
4298 assert(local_ifs != NULL, "invariant");
4299 assert(loader_data != NULL, "invariant");
4300
4301 // Compute maximum size for transitive interfaces
4302 int max_transitive_size = 0;
4303 int super_size = 0;
4304 // Add superclass transitive interfaces size
4305 if (super != NULL) {
4306 super_size = super->transitive_interfaces()->length();
4307 max_transitive_size += super_size;
4308 }
4309 // Add local interfaces' super interfaces
4310 const int local_size = local_ifs->length();
4311 for (int i = 0; i < local_size; i++) {
4312 Klass* const l = local_ifs->at(i);
4313 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4314 }
4315 // Finally add local interfaces
4316 max_transitive_size += local_size;
4317 // Construct array
4318 if (max_transitive_size == 0) {
4319 // no interfaces, use canonicalized array
4320 return Universe::the_empty_klass_array();
4321 } else if (max_transitive_size == super_size) {
4322 // no new local interfaces added, share superklass' transitive interface array
4323 return super->transitive_interfaces();
4324 } else if (max_transitive_size == local_size) {
4325 // only local interfaces added, share local interface array
4326 return local_ifs;
4327 } else {
4328 ResourceMark rm;
4329 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4330
4331 // Copy down from superclass
4332 if (super != NULL) {
4333 append_interfaces(result, super->transitive_interfaces());
4334 }
4335
4336 // Copy down from local interfaces' superinterfaces
4337 for (int i = 0; i < local_size; i++) {
4338 Klass* const l = local_ifs->at(i);
4339 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4340 }
4341 // Finally add local interfaces
4342 append_interfaces(result, local_ifs);
4343
4344 // length will be less than the max_transitive_size if duplicates were removed
4345 const int length = result->length();
4346 assert(length <= max_transitive_size, "just checking");
4347 Array<Klass*>* const new_result =
4348 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4349 for (int i = 0; i < length; i++) {
4350 Klass* const e = result->at(i);
4351 assert(e != NULL, "just checking");
4352 new_result->at_put(i, e);
4353 }
4354 return new_result;
4355 }
4356 }
4357
4358 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4359 assert(this_klass != NULL, "invariant");
4360 const Klass* const super = this_klass->super();
4361 if ((super != NULL) &&
4362 (!Reflection::verify_class_access(this_klass, super, false))) {
4363 ResourceMark rm(THREAD);
4364 Exceptions::fthrow(
4365 THREAD_AND_LOCATION,
4366 vmSymbols::java_lang_IllegalAccessError(),
4367 "class %s cannot access its superclass %s",
4368 this_klass->external_name(),
4369 super->external_name()
4370 );
4371 return;
4372 }
4373 }
4374
4375
4376 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4377 assert(this_klass != NULL, "invariant");
4378 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4379 const int lng = local_interfaces->length();
4380 for (int i = lng - 1; i >= 0; i--) {
4381 Klass* const k = local_interfaces->at(i);
4382 assert (k != NULL && k->is_interface(), "invalid interface");
4383 if (!Reflection::verify_class_access(this_klass, k, false)) {
4384 ResourceMark rm(THREAD);
4385 Exceptions::fthrow(
4386 THREAD_AND_LOCATION,
4387 vmSymbols::java_lang_IllegalAccessError(),
4388 "class %s cannot access its superinterface %s",
4389 this_klass->external_name(),
4390 k->external_name()
4391 );
4392 return;
4393 }
4394 }
4395 }
4396
4397
4398 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4399 assert(this_klass != NULL, "invariant");
4400 const Array<Method*>* const methods = this_klass->methods();
4401 const int num_methods = methods->length();
4402
4403 // go thru each method and check if it overrides a final method
4404 for (int index = 0; index < num_methods; index++) {
4405 const Method* const m = methods->at(index);
4406
4407 // skip private, static, and <init> methods
4408 if ((!m->is_private() && !m->is_static()) &&
4409 (m->name() != vmSymbols::object_initializer_name())) {
4410
4411 const Symbol* const name = m->name();
4412 const Symbol* const signature = m->signature();
4413 const Klass* k = this_klass->super();
4414 const Method* super_m = NULL;
4415 while (k != NULL) {
4416 // skip supers that don't have final methods.
4417 if (k->has_final_method()) {
4418 // lookup a matching method in the super class hierarchy
4419 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4420 if (super_m == NULL) {
4421 break; // didn't find any match; get out
4422 }
4423
4424 if (super_m->is_final() && !super_m->is_static() &&
4425 // matching method in super is final, and not static
4426 (Reflection::verify_field_access(this_klass,
4427 super_m->method_holder(),
4428 super_m->method_holder(),
4429 super_m->access_flags(), false))
4430 // this class can access super final method and therefore override
4431 ) {
4432 ResourceMark rm(THREAD);
4433 Exceptions::fthrow(
4434 THREAD_AND_LOCATION,
4435 vmSymbols::java_lang_VerifyError(),
4436 "class %s overrides final method %s.%s%s",
4437 this_klass->external_name(),
4438 super_m->method_holder()->external_name(),
4439 name->as_C_string(),
4440 signature->as_C_string()
4441 );
4442 return;
4443 }
4444
4445 // continue to look from super_m's holder's super.
4446 k = super_m->method_holder()->super();
4447 continue;
4448 }
4449
4450 k = k->super();
4451 }
4452 }
4453 }
4454 }
4455
4456
4457 // assumes that this_klass is an interface
4458 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4459 assert(this_klass != NULL, "invariant");
4460 assert(this_klass->is_interface(), "not an interface");
4461 const Array<Method*>* methods = this_klass->methods();
4462 const int num_methods = methods->length();
4463
4464 for (int index = 0; index < num_methods; index++) {
4465 const Method* const m = methods->at(index);
4466 // if m is static and not the init method, throw a verify error
4467 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4468 ResourceMark rm(THREAD);
4469 Exceptions::fthrow(
4470 THREAD_AND_LOCATION,
4471 vmSymbols::java_lang_VerifyError(),
4472 "Illegal static method %s in interface %s",
4473 m->name()->as_C_string(),
4474 this_klass->external_name()
4475 );
4476 return;
4477 }
4478 }
4479 }
4480
4481 // utility methods for format checking
4482
4483 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4484 if (!_need_verify) { return; }
4485
4486 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4487 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4488 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4489 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4490 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4491 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4492 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4493
4494 if ((is_abstract && is_final) ||
4495 (is_interface && !is_abstract) ||
4496 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4497 (!is_interface && major_gte_15 && is_annotation)) {
4498 ResourceMark rm(THREAD);
4499 Exceptions::fthrow(
4500 THREAD_AND_LOCATION,
4501 vmSymbols::java_lang_ClassFormatError(),
4502 "Illegal class modifiers in class %s: 0x%X",
4503 _class_name->as_C_string(), flags
4504 );
4505 return;
4506 }
4507 }
4508
4509 static bool has_illegal_visibility(jint flags) {
4510 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4511 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4512 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4513
4514 return ((is_public && is_protected) ||
4515 (is_public && is_private) ||
4516 (is_protected && is_private));
4517 }
4518
4519 static bool is_supported_version(u2 major, u2 minor){
4520 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4521 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4522 (major <= max_version) &&
4523 ((major != max_version) ||
4524 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4525 }
4526
4527 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4528 bool is_interface,
4529 TRAPS) const {
4530 if (!_need_verify) { return; }
4531
4532 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4533 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4534 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4535 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4536 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4537 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4538 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4539 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4540 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4541
4542 bool is_illegal = false;
4543
4544 if (is_interface) {
4545 if (!is_public || !is_static || !is_final || is_private ||
4546 is_protected || is_volatile || is_transient ||
4547 (major_gte_15 && is_enum)) {
4548 is_illegal = true;
4549 }
4550 } else { // not interface
4551 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4552 is_illegal = true;
4553 }
4554 }
4555
4556 if (is_illegal) {
4557 ResourceMark rm(THREAD);
4558 Exceptions::fthrow(
4559 THREAD_AND_LOCATION,
4560 vmSymbols::java_lang_ClassFormatError(),
4561 "Illegal field modifiers in class %s: 0x%X",
4562 _class_name->as_C_string(), flags);
4563 return;
4564 }
4565 }
4566
4567 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4568 bool is_interface,
4569 const Symbol* name,
4570 TRAPS) const {
4571 if (!_need_verify) { return; }
4572
4573 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4574 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4575 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4576 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4577 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4578 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4579 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4580 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4581 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4582 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4583 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4584 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4585 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4586
4587 bool is_illegal = false;
4588
4589 if (is_interface) {
4590 if (major_gte_8) {
4591 // Class file version is JAVA_8_VERSION or later Methods of
4592 // interfaces may set any of the flags except ACC_PROTECTED,
4593 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4594 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4595 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4596 (is_native || is_protected || is_final || is_synchronized) ||
4597 // If a specific method of a class or interface has its
4598 // ACC_ABSTRACT flag set, it must not have any of its
4599 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4600 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4601 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4602 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4603 (is_abstract && (is_private || is_static || is_strict))) {
4604 is_illegal = true;
4605 }
4606 } else if (major_gte_15) {
4607 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4608 if (!is_public || is_private || is_protected || is_static || is_final ||
4609 is_synchronized || is_native || !is_abstract || is_strict) {
4610 is_illegal = true;
4611 }
4612 } else {
4613 // Class file version is pre-JAVA_1_5_VERSION
4614 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4615 is_illegal = true;
4616 }
4617 }
4618 } else { // not interface
4619 if (has_illegal_visibility(flags)) {
4620 is_illegal = true;
4621 } else {
4622 if (is_initializer) {
4623 if (is_static || is_final || is_synchronized || is_native ||
4624 is_abstract || (major_gte_15 && is_bridge)) {
4625 is_illegal = true;
4626 }
4627 } else { // not initializer
4628 if (is_abstract) {
4629 if ((is_final || is_native || is_private || is_static ||
4630 (major_gte_15 && (is_synchronized || is_strict)))) {
4631 is_illegal = true;
4632 }
4633 }
4634 }
4635 }
4636 }
4637
4638 if (is_illegal) {
4639 ResourceMark rm(THREAD);
4640 Exceptions::fthrow(
4641 THREAD_AND_LOCATION,
4642 vmSymbols::java_lang_ClassFormatError(),
4643 "Method %s in class %s has illegal modifiers: 0x%X",
4644 name->as_C_string(), _class_name->as_C_string(), flags);
4645 return;
4646 }
4647 }
4648
4649 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4650 int length,
4651 TRAPS) const {
4652 assert(_need_verify, "only called when _need_verify is true");
4653 int i = 0;
4654 const int count = length >> 2;
4655 for (int k=0; k<count; k++) {
4656 unsigned char b0 = buffer[i];
4657 unsigned char b1 = buffer[i+1];
4658 unsigned char b2 = buffer[i+2];
4659 unsigned char b3 = buffer[i+3];
4660 // For an unsigned char v,
4661 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4662 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4663 const unsigned char res = b0 | b0 - 1 |
4664 b1 | b1 - 1 |
4665 b2 | b2 - 1 |
4666 b3 | b3 - 1;
4667 if (res >= 128) break;
4668 i += 4;
4669 }
4670 for(; i < length; i++) {
4671 unsigned short c;
4672 // no embedded zeros
4673 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4674 if(buffer[i] < 128) {
4675 continue;
4676 }
4677 if ((i + 5) < length) { // see if it's legal supplementary character
4678 if (UTF8::is_supplementary_character(&buffer[i])) {
4679 c = UTF8::get_supplementary_character(&buffer[i]);
4680 i += 5;
4681 continue;
4682 }
4683 }
4684 switch (buffer[i] >> 4) {
4685 default: break;
4686 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4687 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4688 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
4689 c = (buffer[i] & 0x1F) << 6;
4690 i++;
4691 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4692 c += buffer[i] & 0x3F;
4693 if (_major_version <= 47 || c == 0 || c >= 0x80) {
4694 // for classes with major > 47, c must a null or a character in its shortest form
4695 break;
4696 }
4697 }
4698 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4699 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
4700 c = (buffer[i] & 0xF) << 12;
4701 i += 2;
4702 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4703 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4704 if (_major_version <= 47 || c >= 0x800) {
4705 // for classes with major > 47, c must be in its shortest form
4706 break;
4707 }
4708 }
4709 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4710 } // end of switch
4711 } // end of for
4712 }
4713
4714 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4715 // Method names also may not contain the characters '<' or '>', unless <init>
4716 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4717 // method. Because these names have been checked as special cases before
4718 // calling this method in verify_legal_method_name.
4719 static bool verify_unqualified_name(const char* name,
4720 unsigned int length,
4721 int type) {
4722 for (const char* p = name; p != name + length;) {
4723 jchar ch = *p;
4724 if (ch < 128) {
4725 p++;
4726 if (ch == '.' || ch == ';' || ch == '[') {
4727 return false; // do not permit '.', ';', or '['
4728 }
4729 if (type != LegalClass && ch == '/') {
4730 return false; // do not permit '/' unless it's class name
4731 }
4732 if (type == LegalMethod && (ch == '<' || ch == '>')) {
4733 return false; // do not permit '<' or '>' in method names
4734 }
4735 }
4736 else {
4737 char* tmp_p = UTF8::next(p, &ch);
4738 p = tmp_p;
4739 }
4740 }
4741 return true;
4742 }
4743
4744 // Take pointer to a string. Skip over the longest part of the string that could
4745 // be taken as a fieldname. Allow '/' if slash_ok is true.
4746 // Return a pointer to just past the fieldname.
4747 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4748 // being true, we saw consecutive slashes (meaning we were looking for a
4749 // qualified path but found something that was badly-formed).
4750 static const char* skip_over_field_name(const char* name,
4751 bool slash_ok,
4752 unsigned int length) {
4753 const char* p;
4754 jboolean last_is_slash = false;
4755 jboolean not_first_ch = false;
4756
4757 for (p = name; p != name + length; not_first_ch = true) {
4758 const char* old_p = p;
4759 jchar ch = *p;
4760 if (ch < 128) {
4761 p++;
4762 // quick check for ascii
4763 if ((ch >= 'a' && ch <= 'z') ||
4764 (ch >= 'A' && ch <= 'Z') ||
4765 (ch == '_' || ch == '$') ||
4766 (not_first_ch && ch >= '0' && ch <= '9')) {
4767 last_is_slash = false;
4768 continue;
4769 }
4770 if (slash_ok && ch == '/') {
4771 if (last_is_slash) {
4772 return NULL; // Don't permit consecutive slashes
4773 }
4774 last_is_slash = true;
4775 continue;
4776 }
4777 }
4778 else {
4779 jint unicode_ch;
4780 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4781 p = tmp_p;
4782 last_is_slash = false;
4783 // Check if ch is Java identifier start or is Java identifier part
4784 // 4672820: call java.lang.Character methods directly without generating separate tables.
4785 EXCEPTION_MARK;
4786
4787 // return value
4788 JavaValue result(T_BOOLEAN);
4789 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4790 JavaCallArguments args;
4791 args.push_int(unicode_ch);
4792
4793 // public static boolean isJavaIdentifierStart(char ch);
4794 JavaCalls::call_static(&result,
4795 SystemDictionary::Character_klass(),
4796 vmSymbols::isJavaIdentifierStart_name(),
4797 vmSymbols::int_bool_signature(),
4798 &args,
4799 THREAD);
4800
4801 if (HAS_PENDING_EXCEPTION) {
4802 CLEAR_PENDING_EXCEPTION;
4803 return 0;
4804 }
4805 if (result.get_jboolean()) {
4806 continue;
4807 }
4808
4809 if (not_first_ch) {
4810 // public static boolean isJavaIdentifierPart(char ch);
4811 JavaCalls::call_static(&result,
4812 SystemDictionary::Character_klass(),
4813 vmSymbols::isJavaIdentifierPart_name(),
4814 vmSymbols::int_bool_signature(),
4815 &args,
4816 THREAD);
4817
4818 if (HAS_PENDING_EXCEPTION) {
4819 CLEAR_PENDING_EXCEPTION;
4820 return 0;
4821 }
4822
4823 if (result.get_jboolean()) {
4824 continue;
4825 }
4826 }
4827 }
4828 return (not_first_ch) ? old_p : NULL;
4829 }
4830 return (not_first_ch) ? p : NULL;
4831 }
4832
4833 // Take pointer to a string. Skip over the longest part of the string that could
4834 // be taken as a field signature. Allow "void" if void_ok.
4835 // Return a pointer to just past the signature.
4836 // Return NULL if no legal signature is found.
4837 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4838 bool void_ok,
4839 unsigned int length,
4840 TRAPS) const {
4841 unsigned int array_dim = 0;
4842 while (length > 0) {
4843 switch (signature[0]) {
4844 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4845 case JVM_SIGNATURE_BOOLEAN:
4846 case JVM_SIGNATURE_BYTE:
4847 case JVM_SIGNATURE_CHAR:
4848 case JVM_SIGNATURE_SHORT:
4849 case JVM_SIGNATURE_INT:
4850 case JVM_SIGNATURE_FLOAT:
4851 case JVM_SIGNATURE_LONG:
4852 case JVM_SIGNATURE_DOUBLE:
4853 return signature + 1;
4854 case JVM_SIGNATURE_CLASS: {
4855 if (_major_version < JAVA_1_5_VERSION) {
4856 // Skip over the class name if one is there
4857 const char* const p = skip_over_field_name(signature + 1, true, --length);
4858
4859 // The next character better be a semicolon
4860 if (p && (p - signature) > 1 && p[0] == ';') {
4861 return p + 1;
4862 }
4863 }
4864 else {
4865 // 4900761: For class version > 48, any unicode is allowed in class name.
4866 length--;
4867 signature++;
4868 while (length > 0 && signature[0] != ';') {
4869 if (signature[0] == '.') {
4870 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4871 }
4872 length--;
4873 signature++;
4874 }
4875 if (signature[0] == ';') { return signature + 1; }
4876 }
4877
4878 return NULL;
4879 }
4880 case JVM_SIGNATURE_ARRAY:
4881 array_dim++;
4882 if (array_dim > 255) {
4883 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4884 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4885 }
4886 // The rest of what's there better be a legal signature
4887 signature++;
4888 length--;
4889 void_ok = false;
4890 break;
4891
4892 default:
4893 return NULL;
4894 }
4895 }
4896 return NULL;
4897 }
4898
4899 // Checks if name is a legal class name.
4900 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4901 if (!_need_verify || _relax_verify) { return; }
4902
4903 char buf[fixed_buffer_size];
4904 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4905 unsigned int length = name->utf8_length();
4906 bool legal = false;
4907
4908 if (length > 0) {
4909 const char* p;
4910 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4911 p = skip_over_field_signature(bytes, false, length, CHECK);
4912 legal = (p != NULL) && ((p - bytes) == (int)length);
4913 } else if (_major_version < JAVA_1_5_VERSION) {
4914 if (bytes[0] != '<') {
4915 p = skip_over_field_name(bytes, true, length);
4916 legal = (p != NULL) && ((p - bytes) == (int)length);
4917 }
4918 } else {
4919 // 4900761: relax the constraints based on JSR202 spec
4920 // Class names may be drawn from the entire Unicode character set.
4921 // Identifiers between '/' must be unqualified names.
4922 // The utf8 string has been verified when parsing cpool entries.
4923 legal = verify_unqualified_name(bytes, length, LegalClass);
4924 }
4925 }
4926 if (!legal) {
4927 ResourceMark rm(THREAD);
4928 assert(_class_name != NULL, "invariant");
4929 Exceptions::fthrow(
4930 THREAD_AND_LOCATION,
4931 vmSymbols::java_lang_ClassFormatError(),
4932 "Illegal class name \"%s\" in class file %s", bytes,
4933 _class_name->as_C_string()
4934 );
4935 return;
4936 }
4937 }
4938
4939 // Checks if name is a legal field name.
4940 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4941 if (!_need_verify || _relax_verify) { return; }
4942
4943 char buf[fixed_buffer_size];
4944 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4945 unsigned int length = name->utf8_length();
4946 bool legal = false;
4947
4948 if (length > 0) {
4949 if (_major_version < JAVA_1_5_VERSION) {
4950 if (bytes[0] != '<') {
4951 const char* p = skip_over_field_name(bytes, false, length);
4952 legal = (p != NULL) && ((p - bytes) == (int)length);
4953 }
4954 } else {
4955 // 4881221: relax the constraints based on JSR202 spec
4956 legal = verify_unqualified_name(bytes, length, LegalField);
4957 }
4958 }
4959
4960 if (!legal) {
4961 ResourceMark rm(THREAD);
4962 assert(_class_name != NULL, "invariant");
4963 Exceptions::fthrow(
4964 THREAD_AND_LOCATION,
4965 vmSymbols::java_lang_ClassFormatError(),
4966 "Illegal field name \"%s\" in class %s", bytes,
4967 _class_name->as_C_string()
4968 );
4969 return;
4970 }
4971 }
4972
4973 // Checks if name is a legal method name.
4974 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4975 if (!_need_verify || _relax_verify) { return; }
4976
4977 assert(name != NULL, "method name is null");
4978 char buf[fixed_buffer_size];
4979 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4980 unsigned int length = name->utf8_length();
4981 bool legal = false;
4982
4983 if (length > 0) {
4984 if (bytes[0] == '<') {
4985 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4986 legal = true;
4987 }
4988 } else if (_major_version < JAVA_1_5_VERSION) {
4989 const char* p;
4990 p = skip_over_field_name(bytes, false, length);
4991 legal = (p != NULL) && ((p - bytes) == (int)length);
4992 } else {
4993 // 4881221: relax the constraints based on JSR202 spec
4994 legal = verify_unqualified_name(bytes, length, LegalMethod);
4995 }
4996 }
4997
4998 if (!legal) {
4999 ResourceMark rm(THREAD);
5000 assert(_class_name != NULL, "invariant");
5001 Exceptions::fthrow(
5002 THREAD_AND_LOCATION,
5003 vmSymbols::java_lang_ClassFormatError(),
5004 "Illegal method name \"%s\" in class %s", bytes,
5005 _class_name->as_C_string()
5006 );
5007 return;
5008 }
5009 }
5010
5011
5012 // Checks if signature is a legal field signature.
5013 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5014 const Symbol* signature,
5015 TRAPS) const {
5016 if (!_need_verify) { return; }
5017
5018 char buf[fixed_buffer_size];
5019 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5020 const unsigned int length = signature->utf8_length();
5021 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5022
5023 if (p == NULL || (p - bytes) != (int)length) {
5024 throwIllegalSignature("Field", name, signature, CHECK);
5025 }
5026 }
5027
5028 // Checks if signature is a legal method signature.
5029 // Returns number of parameters
5030 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5031 const Symbol* signature,
5032 TRAPS) const {
5033 if (!_need_verify) {
5034 // make sure caller's args_size will be less than 0 even for non-static
5035 // method so it will be recomputed in compute_size_of_parameters().
5036 return -2;
5037 }
5038
5039 // Class initializers cannot have args for class format version >= 51.
5040 if (name == vmSymbols::class_initializer_name() &&
5041 signature != vmSymbols::void_method_signature() &&
5042 _major_version >= JAVA_7_VERSION) {
5043 throwIllegalSignature("Method", name, signature, CHECK_0);
5044 return 0;
5045 }
5046
5047 unsigned int args_size = 0;
5048 char buf[fixed_buffer_size];
5049 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5050 unsigned int length = signature->utf8_length();
5051 const char* nextp;
5052
5053 // The first character must be a '('
5054 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5055 length--;
5056 // Skip over legal field signatures
5057 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5058 while ((length > 0) && (nextp != NULL)) {
5059 args_size++;
5060 if (p[0] == 'J' || p[0] == 'D') {
5061 args_size++;
5062 }
5063 length -= nextp - p;
5064 p = nextp;
5065 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5066 }
5067 // The first non-signature thing better be a ')'
5068 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5069 length--;
5070 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5071 // All internal methods must return void
5072 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5073 return args_size;
5074 }
5075 } else {
5076 // Now we better just have a return value
5077 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5078 if (nextp && ((int)length == (nextp - p))) {
5079 return args_size;
5080 }
5081 }
5082 }
5083 }
5084 // Report error
5085 throwIllegalSignature("Method", name, signature, CHECK_0);
5086 return 0;
5087 }
5088
5089 int ClassFileParser::static_field_size() const {
5090 assert(_field_info != NULL, "invariant");
5091 return _field_info->static_field_size;
5092 }
5093
5094 int ClassFileParser::total_oop_map_count() const {
5095 assert(_field_info != NULL, "invariant");
5096 return _field_info->total_oop_map_count;
5097 }
5098
5099 jint ClassFileParser::layout_size() const {
5100 assert(_field_info != NULL, "invariant");
5101 return _field_info->instance_size;
5102 }
5103
5104 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5105 const Array<Method*>* methods) {
5106 assert(ik != NULL, "invariant");
5107 assert(methods != NULL, "invariant");
5108
5109 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5110 // (We used to do this lazily, but now we query it in Rewriter,
5111 // which is eagerly done for every method, so we might as well do it now,
5112 // when everything is fresh in memory.)
5113 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5114
5115 if (klass_id != vmSymbols::NO_SID) {
5116 for (int j = 0; j < methods->length(); ++j) {
5117 Method* method = methods->at(j);
5118 method->init_intrinsic_id();
5119
5120 if (CheckIntrinsics) {
5121 // Check if an intrinsic is defined for method 'method',
5122 // but the method is not annotated with @HotSpotIntrinsicCandidate.
5123 if (method->intrinsic_id() != vmIntrinsics::_none &&
5124 !method->intrinsic_candidate()) {
5125 tty->print("Compiler intrinsic is defined for method [%s], "
5126 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5127 method->name_and_sig_as_C_string(),
5128 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5129 );
5130 tty->cr();
5131 DEBUG_ONLY(vm_exit(1));
5132 }
5133 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5134 // but there is no intrinsic available for it.
5135 if (method->intrinsic_candidate() &&
5136 method->intrinsic_id() == vmIntrinsics::_none) {
5137 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5138 "but no compiler intrinsic is defined for the method.%s",
5139 method->name_and_sig_as_C_string(),
5140 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5141 );
5142 tty->cr();
5143 DEBUG_ONLY(vm_exit(1));
5144 }
5145 }
5146 } // end for
5147
5148 #ifdef ASSERT
5149 if (CheckIntrinsics) {
5150 // Check for orphan methods in the current class. A method m
5151 // of a class C is orphan if an intrinsic is defined for method m,
5152 // but class C does not declare m.
5153 // The check is potentially expensive, therefore it is available
5154 // only in debug builds.
5155
5156 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5157 if (vmIntrinsics::_compiledLambdaForm == id) {
5158 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5159 // generated for the JVM from a LambdaForm and therefore no method
5160 // is defined for it.
5161 continue;
5162 }
5163
5164 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5165 // Check if the current class contains a method with the same
5166 // name, flags, signature.
5167 bool match = false;
5168 for (int j = 0; j < methods->length(); ++j) {
5169 const Method* method = methods->at(j);
5170 if (method->intrinsic_id() == id) {
5171 match = true;
5172 break;
5173 }
5174 }
5175
5176 if (!match) {
5177 char buf[1000];
5178 tty->print("Compiler intrinsic is defined for method [%s], "
5179 "but the method is not available in class [%s].%s",
5180 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5181 buf, sizeof(buf)),
5182 ik->name()->as_C_string(),
5183 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5184 );
5185 tty->cr();
5186 DEBUG_ONLY(vm_exit(1));
5187 }
5188 }
5189 } // end for
5190 } // CheckIntrinsics
5191 #endif // ASSERT
5192 }
5193 }
5194
5195 InstanceKlass* ClassFileParser::create_instance_klass(TRAPS) {
5196 if (_klass != NULL) {
5197 return _klass;
5198 }
5199
5200 InstanceKlass* const ik =
5201 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5202
5203 fill_instance_klass(ik, CHECK_NULL);
5204
5205 assert(_klass == ik, "invariant");
5206
5207 return ik;
5208 }
5209
5210 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, TRAPS) {
5211 assert(ik != NULL, "invariant");
5212
5213 set_klass_to_deallocate(ik);
5214
5215 assert(_field_info != NULL, "invariant");
5216 assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5217 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5218 "sanity");
5219
5220 assert(ik->is_instance_klass(), "sanity");
5221 assert(ik->size_helper() == _field_info->instance_size, "sanity");
5222
5223 // Fill in information already parsed
5224 ik->set_should_verify_class(_need_verify);
5225
5226 // Not yet: supers are done below to support the new subtype-checking fields
5227 ik->set_class_loader_data(_loader_data);
5228 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5229 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5230 assert(_fac != NULL, "invariant");
5231 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5232
5233 // this transfers ownership of a lot of arrays from
5234 // the parser onto the InstanceKlass*
5235 apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5236
5237 // note that is not safe to use the fields in the parser from this point on
5238 assert(NULL == _cp, "invariant");
5239 assert(NULL == _fields, "invariant");
5240 assert(NULL == _methods, "invariant");
5241 assert(NULL == _inner_classes, "invariant");
5242 assert(NULL == _local_interfaces, "invariant");
5243 assert(NULL == _transitive_interfaces, "invariant");
5244 assert(NULL == _combined_annotations, "invariant");
5245
5246 if (_has_final_method) {
5247 ik->set_has_final_method();
5248 }
5249
5250 ik->copy_method_ordering(_method_ordering, CHECK);
5251 // The InstanceKlass::_methods_jmethod_ids cache
5252 // is managed on the assumption that the initial cache
5253 // size is equal to the number of methods in the class. If
5254 // that changes, then InstanceKlass::idnum_can_increment()
5255 // has to be changed accordingly.
5256 ik->set_initial_method_idnum(ik->methods()->length());
5257
5258 ik->set_name(_class_name);
5259
5260 if (is_anonymous()) {
5261 // I am well known to myself
5262 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve
5263 }
5264
5265 ik->set_minor_version(_minor_version);
5266 ik->set_major_version(_major_version);
5267 ik->set_has_default_methods(_has_default_methods);
5268 ik->set_declares_default_methods(_declares_default_methods);
5269
5270 if (_host_klass != NULL) {
5271 assert (ik->is_anonymous(), "should be the same");
5272 ik->set_host_klass(_host_klass);
5273 }
5274
5275 const Array<Method*>* const methods = ik->methods();
5276 assert(methods != NULL, "invariant");
5277 const int methods_len = methods->length();
5278
5279 check_methods_for_intrinsics(ik, methods);
5280
5281 // Fill in field values obtained by parse_classfile_attributes
5282 if (_parsed_annotations->has_any_annotations()) {
5283 _parsed_annotations->apply_to(ik);
5284 }
5285
5286 apply_parsed_class_attributes(ik);
5287
5288 // Miranda methods
5289 if ((_num_miranda_methods > 0) ||
5290 // if this class introduced new miranda methods or
5291 (_super_klass != NULL && _super_klass->has_miranda_methods())
5292 // super class exists and this class inherited miranda methods
5293 ) {
5294 ik->set_has_miranda_methods(); // then set a flag
5295 }
5296
5297 // Fill in information needed to compute superclasses.
5298 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5299
5300 // Initialize itable offset tables
5301 klassItable::setup_itable_offset_table(ik);
5302
5303 // Compute transitive closure of interfaces this class implements
5304 // Do final class setup
5305 fill_oop_maps(ik,
5306 _field_info->nonstatic_oop_map_count,
5307 _field_info->nonstatic_oop_offsets,
5308 _field_info->nonstatic_oop_counts);
5309
5310 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5311 set_precomputed_flags(ik);
5312
5313 // check if this class can access its super class
5314 check_super_class_access(ik, CHECK);
5315
5316 // check if this class can access its superinterfaces
5317 check_super_interface_access(ik, CHECK);
5318
5319 // check if this class overrides any final method
5320 check_final_method_override(ik, CHECK);
5321
5322 // check that if this class is an interface then it doesn't have static methods
5323 if (ik->is_interface()) {
5324 /* An interface in a JAVA 8 classfile can be static */
5325 if (_major_version < JAVA_8_VERSION) {
5326 check_illegal_static_method(ik, CHECK);
5327 }
5328 }
5329
5330 // Allocate mirror and initialize static fields
5331 // The create_mirror() call will also call compute_modifiers()
5332 java_lang_Class::create_mirror(ik,
5333 _loader_data->class_loader(),
5334 _protection_domain,
5335 CHECK);
5336
5337 assert(_all_mirandas != NULL, "invariant");
5338
5339 // Generate any default methods - default methods are interface methods
5340 // that have a default implementation. This is new with Lambda project.
5341 if (_has_default_methods ) {
5342 DefaultMethods::generate_default_methods(ik,
5343 _all_mirandas,
5344 CHECK);
5345 }
5346
5347 // Update the loader_data graph.
5348 record_defined_class_dependencies(ik, CHECK);
5349
5350 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5351
5352 if (!is_internal()) {
5353 if (TraceClassLoading) {
5354 ResourceMark rm;
5355 // print in a single call to reduce interleaving of output
5356 if (_stream->source() != NULL) {
5357 tty->print("[Loaded %s from %s]\n",
5358 ik->external_name(),
5359 _stream->source());
5360 } else if (_loader_data->class_loader() == NULL) {
5361 const Klass* const caller =
5362 THREAD->is_Java_thread()
5363 ? ((JavaThread*)THREAD)->security_get_caller_class(1)
5364 : NULL;
5365 // caller can be NULL, for example, during a JVMTI VM_Init hook
5366 if (caller != NULL) {
5367 tty->print("[Loaded %s by instance of %s]\n",
5368 ik->external_name(),
5369 caller->external_name());
5370 } else {
5371 tty->print("[Loaded %s]\n", ik->external_name());
5372 }
5373 } else {
5374 tty->print("[Loaded %s from %s]\n", ik->external_name(),
5375 _loader_data->class_loader()->klass()->external_name());
5376 }
5377 }
5378
5379 if (log_is_enabled(Info, classresolve)) {
5380 ResourceMark rm;
5381 // print out the superclass.
5382 const char * from = ik->external_name();
5383 if (ik->java_super() != NULL) {
5384 log_info(classresolve)("%s %s (super)",
5385 from,
5386 ik->java_super()->external_name());
5387 }
5388 // print out each of the interface classes referred to by this class.
5389 const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5390 if (local_interfaces != NULL) {
5391 const int length = local_interfaces->length();
5392 for (int i = 0; i < length; i++) {
5393 const Klass* const k = local_interfaces->at(i);
5394 const char * to = k->external_name();
5395 log_info(classresolve)("%s %s (interface)", from, to);
5396 }
5397 }
5398 }
5399 }
5400
5401 TRACE_INIT_ID(ik);
5402
5403 // If we reach here, all is well.
5404 // Now remove the InstanceKlass* from the _klass_to_deallocate field
5405 // in order for it to not be destroyed in the ClassFileParser destructor.
5406 set_klass_to_deallocate(NULL);
5407
5408 // it's official
5409 set_klass(ik);
5410
5411 debug_only(ik->verify();)
5412 }
5413
5414 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5415 Symbol* name,
5416 ClassLoaderData* loader_data,
5417 Handle protection_domain,
5418 TempNewSymbol* parsed_name,
5419 const Klass* host_klass,
5420 GrowableArray<Handle>* cp_patches,
5421 Publicity pub_level,
5422 TRAPS) :
5423 _stream(stream),
5424 _requested_name(name),
5425 _loader_data(loader_data),
5426 _host_klass(host_klass),
5427 _cp_patches(cp_patches),
5428 _parsed_name(parsed_name),
5429 _super_klass(),
5430 _cp(NULL),
5431 _fields(NULL),
5432 _methods(NULL),
5433 _inner_classes(NULL),
5434 _local_interfaces(NULL),
5435 _transitive_interfaces(NULL),
5436 _combined_annotations(NULL),
5437 _annotations(NULL),
5438 _type_annotations(NULL),
5439 _fields_annotations(NULL),
5440 _fields_type_annotations(NULL),
5441 _klass(NULL),
5442 _klass_to_deallocate(NULL),
5443 _parsed_annotations(NULL),
5444 _fac(NULL),
5445 _field_info(NULL),
5446 _method_ordering(NULL),
5447 _all_mirandas(NULL),
5448 _vtable_size(0),
5449 _itable_size(0),
5450 _num_miranda_methods(0),
5451 _rt(REF_NONE),
5452 _protection_domain(protection_domain),
5453 _access_flags(),
5454 _pub_level(pub_level),
5455 _synthetic_flag(false),
5456 _sde_length(false),
5457 _sde_buffer(NULL),
5458 _sourcefile_index(0),
5459 _generic_signature_index(0),
5460 _major_version(0),
5461 _minor_version(0),
5462 _this_class_index(0),
5463 _super_class_index(0),
5464 _itfs_len(0),
5465 _java_fields_count(0),
5466 _need_verify(false),
5467 _relax_verify(false),
5468 _has_default_methods(false),
5469 _declares_default_methods(false),
5470 _has_final_method(false),
5471 _has_finalizer(false),
5472 _has_empty_finalizer(false),
5473 _has_vanilla_constructor(false),
5474 _max_bootstrap_specifier_index(-1) {
5475
5476 _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5477
5478 assert(THREAD->is_Java_thread(), "invariant");
5479 assert(_loader_data != NULL, "invariant");
5480 assert(stream != NULL, "invariant");
5481 assert(_stream != NULL, "invariant");
5482 assert(_stream->buffer() == _stream->current(), "invariant");
5483 assert(_class_name != NULL, "invariant");
5484 assert(0 == _access_flags.as_int(), "invariant");
5485
5486 // Figure out whether we can skip format checking (matching classic VM behavior)
5487 if (DumpSharedSpaces) {
5488 // verify == true means it's a 'remote' class (i.e., non-boot class)
5489 // Verification decision is based on BytecodeVerificationRemote flag
5490 // for those classes.
5491 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5492 BytecodeVerificationLocal;
5493 }
5494 else {
5495 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5496 stream->need_verify());
5497 }
5498
5499 // synch back verification state to stream
5500 stream->set_verify(_need_verify);
5501
5502 // Check if verification needs to be relaxed for this class file
5503 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5504 _relax_verify = Verifier::relax_verify_for(_loader_data->class_loader());
5505
5506 parse_stream(stream, CHECK);
5507
5508 post_process_parsed_stream(stream, _cp, CHECK);
5509 }
5510
5511 void ClassFileParser::clear_class_metadata() {
5512 // metadata created before the instance klass is created. Must be
5513 // deallocated if classfile parsing returns an error.
5514 _cp = NULL;
5515 _fields = NULL;
5516 _methods = NULL;
5517 _inner_classes = NULL;
5518 _local_interfaces = NULL;
5519 _transitive_interfaces = NULL;
5520 _combined_annotations = NULL;
5521 _annotations = _type_annotations = NULL;
5522 _fields_annotations = _fields_type_annotations = NULL;
5523 }
5524
5525 // Destructor to clean up
5526 ClassFileParser::~ClassFileParser() {
5527 if (_cp != NULL) {
5528 MetadataFactory::free_metadata(_loader_data, _cp);
5529 }
5530 if (_fields != NULL) {
5531 MetadataFactory::free_array<u2>(_loader_data, _fields);
5532 }
5533
5534 if (_methods != NULL) {
5535 // Free methods
5536 InstanceKlass::deallocate_methods(_loader_data, _methods);
5537 }
5538
5539 // beware of the Universe::empty_blah_array!!
5540 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5541 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5542 }
5543
5544 // Free interfaces
5545 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5546 _local_interfaces, _transitive_interfaces);
5547
5548 if (_combined_annotations != NULL) {
5549 // After all annotations arrays have been created, they are installed into the
5550 // Annotations object that will be assigned to the InstanceKlass being created.
5551
5552 // Deallocate the Annotations object and the installed annotations arrays.
5553 _combined_annotations->deallocate_contents(_loader_data);
5554
5555 // If the _combined_annotations pointer is non-NULL,
5556 // then the other annotations fields should have been cleared.
5557 assert(_annotations == NULL, "Should have been cleared");
5558 assert(_type_annotations == NULL, "Should have been cleared");
5559 assert(_fields_annotations == NULL, "Should have been cleared");
5560 assert(_fields_type_annotations == NULL, "Should have been cleared");
5561 } else {
5562 // If the annotations arrays were not installed into the Annotations object,
5563 // then they have to be deallocated explicitly.
5564 MetadataFactory::free_array<u1>(_loader_data, _annotations);
5565 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5566 Annotations::free_contents(_loader_data, _fields_annotations);
5567 Annotations::free_contents(_loader_data, _fields_type_annotations);
5568 }
5569
5570 clear_class_metadata();
5571
5572 // deallocate the klass if already created. Don't directly deallocate, but add
5573 // to the deallocate list so that the klass is removed from the CLD::_klasses list
5574 // at a safepoint.
5575 if (_klass_to_deallocate != NULL) {
5576 _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5577 }
5578 }
5579
5580 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5581 TRAPS) {
5582
5583 assert(stream != NULL, "invariant");
5584 assert(_class_name != NULL, "invariant");
5585
5586 // BEGIN STREAM PARSING
5587 stream->guarantee_more(8, CHECK); // magic, major, minor
5588 // Magic value
5589 const u4 magic = stream->get_u4_fast();
5590 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5591 "Incompatible magic value %u in class file %s",
5592 magic, CHECK);
5593
5594 // Version numbers
5595 _minor_version = stream->get_u2_fast();
5596 _major_version = stream->get_u2_fast();
5597
5598 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5599 ResourceMark rm;
5600 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5601 _major_version, _minor_version, _class_name->as_C_string());
5602 Exceptions::fthrow(
5603 THREAD_AND_LOCATION,
5604 vmSymbols::java_lang_UnsupportedClassVersionError(),
5605 "Unsupported major.minor version for dump time %u.%u",
5606 _major_version,
5607 _minor_version);
5608 }
5609
5610 // Check version numbers - we check this even with verifier off
5611 if (!is_supported_version(_major_version, _minor_version)) {
5612 ResourceMark rm(THREAD);
5613 Exceptions::fthrow(
5614 THREAD_AND_LOCATION,
5615 vmSymbols::java_lang_UnsupportedClassVersionError(),
5616 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5617 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
5618 _class_name->as_C_string(),
5619 _major_version,
5620 _minor_version,
5621 JAVA_MAX_SUPPORTED_VERSION,
5622 JAVA_MAX_SUPPORTED_MINOR_VERSION);
5623 return;
5624 }
5625
5626 stream->guarantee_more(3, CHECK); // length, first cp tag
5627 const u2 cp_size = stream->get_u2_fast();
5628
5629 guarantee_property(
5630 cp_size >= 1, "Illegal constant pool size %u in class file %s",
5631 cp_size, CHECK);
5632
5633 _cp = ConstantPool::allocate(_loader_data,
5634 cp_size,
5635 CHECK);
5636
5637 ConstantPool* const cp = _cp;
5638
5639 parse_constant_pool(stream, cp, cp_size, CHECK);
5640
5641 assert(cp_size == (const u2)cp->length(), "invariant");
5642
5643 // ACCESS FLAGS
5644 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5645
5646 // Access flags
5647 jint flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5648
5649 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5650 // Set abstract bit for old class files for backward compatibility
5651 flags |= JVM_ACC_ABSTRACT;
5652 }
5653
5654 _access_flags.set_flags(flags);
5655
5656 verify_legal_class_modifiers((jint)_access_flags.as_int(), CHECK);
5657
5658 // This class and superclass
5659 _this_class_index = stream->get_u2_fast();
5660 check_property(
5661 valid_cp_range(_this_class_index, cp_size) &&
5662 cp->tag_at(_this_class_index).is_unresolved_klass(),
5663 "Invalid this class index %u in constant pool in class file %s",
5664 _this_class_index, CHECK);
5665
5666 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5667 assert(class_name_in_cp != NULL, "class_name can't be null");
5668
5669 if (_parsed_name != NULL) {
5670 // It's important to set parsed_name *before* resolving the super class.
5671 // (it's used for cleanup by the caller if parsing fails)
5672 *_parsed_name = class_name_in_cp;
5673 // parsed_name is returned and can be used if there's an error, so add to
5674 // its reference count. Caller will decrement the refcount.
5675 (*_parsed_name)->increment_refcount();
5676 }
5677
5678 // Update _class_name which could be null previously
5679 // to reflect the name in the constant pool
5680 _class_name = class_name_in_cp;
5681
5682 // Don't need to check whether this class name is legal or not.
5683 // It has been checked when constant pool is parsed.
5684 // However, make sure it is not an array type.
5685 if (_need_verify) {
5686 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
5687 "Bad class name in class file %s",
5688 CHECK);
5689 }
5690
5691 // Checks if name in class file matches requested name
5692 if (_requested_name != NULL && _requested_name != _class_name) {
5693 ResourceMark rm(THREAD);
5694 Exceptions::fthrow(
5695 THREAD_AND_LOCATION,
5696 vmSymbols::java_lang_NoClassDefFoundError(),
5697 "%s (wrong name: %s)",
5698 _class_name->as_C_string(),
5699 _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
5700 );
5701 return;
5702 }
5703
5704 if (!is_internal()) {
5705 if (TraceClassLoadingPreorder) {
5706 tty->print("[Loading %s",
5707 _class_name->as_klass_external_name());
5708
5709 if (stream->source() != NULL) {
5710 tty->print(" from %s", stream->source());
5711 }
5712 tty->print_cr("]");
5713 }
5714 #if INCLUDE_CDS
5715 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5716 // Only dump the classes that can be stored into CDS archive
5717 if (SystemDictionaryShared::is_sharing_possible(_loader_data)) {
5718 ResourceMark rm(THREAD);
5719 classlist_file->print_cr("%s", _class_name->as_C_string());
5720 classlist_file->flush();
5721 }
5722 }
5723 #endif
5724 }
5725
5726 // SUPERKLASS
5727 _super_class_index = stream->get_u2_fast();
5728 _super_klass = parse_super_class(cp,
5729 _super_class_index,
5730 _need_verify,
5731 CHECK);
5732
5733 // Interfaces
5734 _itfs_len = stream->get_u2_fast();
5735 parse_interfaces(stream,
5736 _itfs_len,
5737 cp,
5738 &_has_default_methods,
5739 CHECK);
5740
5741 assert(_local_interfaces != NULL, "invariant");
5742
5743 // Fields (offsets are filled in later)
5744 _fac = new FieldAllocationCount();
5745 parse_fields(stream,
5746 _access_flags.is_interface(),
5747 _fac,
5748 cp,
5749 cp_size,
5750 &_java_fields_count,
5751 CHECK);
5752
5753 assert(_fields != NULL, "invariant");
5754
5755 // Methods
5756 AccessFlags promoted_flags;
5757 parse_methods(stream,
5758 _access_flags.is_interface(),
5759 &promoted_flags,
5760 &_has_final_method,
5761 &_declares_default_methods,
5762 CHECK);
5763
5764 assert(_methods != NULL, "invariant");
5765
5766 // promote flags from parse_methods() to the klass' flags
5767 _access_flags.add_promoted_flags(promoted_flags.as_int());
5768
5769 if (_declares_default_methods) {
5770 _has_default_methods = true;
5771 }
5772
5773 // Additional attributes/annotations
5774 _parsed_annotations = new ClassAnnotationCollector();
5775 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5776
5777 assert(_inner_classes != NULL, "invariant");
5778
5779 // Finalize the Annotations metadata object,
5780 // now that all annotation arrays have been created.
5781 create_combined_annotations(CHECK);
5782
5783 // Make sure this is the end of class file stream
5784 guarantee_property(stream->at_eos(),
5785 "Extra bytes at the end of class file %s",
5786 CHECK);
5787
5788 // all bytes in stream read and parsed
5789 }
5790
5791 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5792 ConstantPool* cp,
5793 TRAPS) {
5794 assert(stream != NULL, "invariant");
5795 assert(stream->at_eos(), "invariant");
5796 assert(cp != NULL, "invariant");
5797 assert(_loader_data != NULL, "invariant");
5798
5799 // We check super class after class file is parsed and format is checked
5800 if (_super_class_index > 0 && NULL ==_super_klass) {
5801 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5802 if (_access_flags.is_interface()) {
5803 // Before attempting to resolve the superclass, check for class format
5804 // errors not checked yet.
5805 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5806 "Interfaces must have java.lang.Object as superclass in class file %s",
5807 CHECK);
5808 }
5809 _super_klass = (const InstanceKlass*)
5810 SystemDictionary::resolve_super_or_fail(_class_name,
5811 super_class_name,
5812 _loader_data->class_loader(),
5813 _protection_domain,
5814 true,
5815 CHECK);
5816 }
5817
5818 if (_super_klass != NULL) {
5819 if (_super_klass->has_default_methods()) {
5820 _has_default_methods = true;
5821 }
5822
5823 if (_super_klass->is_interface()) {
5824 ResourceMark rm(THREAD);
5825 Exceptions::fthrow(
5826 THREAD_AND_LOCATION,
5827 vmSymbols::java_lang_IncompatibleClassChangeError(),
5828 "class %s has interface %s as super class",
5829 _class_name->as_klass_external_name(),
5830 _super_klass->external_name()
5831 );
5832 return;
5833 }
5834 // Make sure super class is not final
5835 if (_super_klass->is_final()) {
5836 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
5837 }
5838 }
5839
5840 // Compute the transitive list of all unique interfaces implemented by this class
5841 _transitive_interfaces =
5842 compute_transitive_interfaces(_super_klass,
5843 _local_interfaces,
5844 _loader_data,
5845 CHECK);
5846
5847 assert(_transitive_interfaces != NULL, "invariant");
5848
5849 // sort methods
5850 _method_ordering = sort_methods(_methods);
5851
5852 _all_mirandas = new GrowableArray<Method*>(20);
5853
5854 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5855 &_num_miranda_methods,
5856 _all_mirandas,
5857 _super_klass,
5858 _methods,
5859 _access_flags,
5860 _loader_data->class_loader(),
5861 _class_name,
5862 _local_interfaces,
5863 CHECK);
5864
5865 // Size of Java itable (in words)
5866 _itable_size = _access_flags.is_interface() ? 0 :
5867 klassItable::compute_itable_size(_transitive_interfaces);
5868
5869 assert(_fac != NULL, "invariant");
5870 assert(_parsed_annotations != NULL, "invariant");
5871
5872 _field_info = new FieldLayoutInfo();
5873 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
5874
5875 // Compute reference typ
5876 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
5877
5878 }
5879
5880 void ClassFileParser::set_klass(InstanceKlass* klass) {
5881
5882 #ifdef ASSERT
5883 if (klass != NULL) {
5884 assert(NULL == _klass, "leaking?");
5885 }
5886 #endif
5887
5888 _klass = klass;
5889 }
5890
5891 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
5892
5893 #ifdef ASSERT
5894 if (klass != NULL) {
5895 assert(NULL == _klass_to_deallocate, "leaking?");
5896 }
5897 #endif
5898
5899 _klass_to_deallocate = klass;
5900 }
5901
5902 // Caller responsible for ResourceMark
5903 // clone stream with rewound position
5904 const ClassFileStream* ClassFileParser::clone_stream() const {
5905 assert(_stream != NULL, "invariant");
5906
5907 return _stream->clone();
5908 }