1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classFileParser.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/referenceType.hpp"
41 #include "memory/resourceArea.hpp"
42 #include "memory/universe.inline.hpp"
43 #include "oops/constantPool.hpp"
44 #include "oops/fieldStreams.hpp"
45 #include "oops/instanceKlass.hpp"
46 #include "oops/instanceMirrorKlass.hpp"
47 #include "oops/klass.inline.hpp"
48 #include "oops/klassVtable.hpp"
49 #include "oops/method.hpp"
50 #include "oops/symbol.hpp"
51 #include "prims/jvm.h"
52 #include "prims/jvmtiExport.hpp"
53 #include "prims/jvmtiThreadState.hpp"
54 #include "runtime/javaCalls.hpp"
55 #include "runtime/perfData.hpp"
56 #include "runtime/reflection.hpp"
57 #include "runtime/signature.hpp"
58 #include "runtime/timer.hpp"
59 #include "services/classLoadingService.hpp"
60 #include "services/threadService.hpp"
61 #include "utilities/array.hpp"
62 #include "utilities/exceptions.hpp"
63 #include "utilities/globalDefinitions.hpp"
64 #include "utilities/macros.hpp"
65 #include "utilities/ostream.hpp"
66 #include "utilities/resourceHash.hpp"
67 #if INCLUDE_CDS
68 #include "classfile/systemDictionaryShared.hpp"
69 #endif
70
71 // We generally try to create the oops directly when parsing, rather than
72 // allocating temporary data structures and copying the bytes twice. A
73 // temporary area is only needed when parsing utf8 entries in the constant
74 // pool and when parsing line number tables.
75
76 // We add assert in debug mode when class format is not checked.
77
78 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
79 #define JAVA_MIN_SUPPORTED_VERSION 45
80 #define JAVA_MAX_SUPPORTED_VERSION 52
81 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
82
83 // Used for two backward compatibility reasons:
84 // - to check for new additions to the class file format in JDK1.5
85 // - to check for bug fixes in the format checker in JDK1.5
86 #define JAVA_1_5_VERSION 49
87
88 // Used for backward compatibility reasons:
89 // - to check for javac bug fixes that happened after 1.5
90 // - also used as the max version when running in jdk6
91 #define JAVA_6_VERSION 50
92
93 // Used for backward compatibility reasons:
94 // - to check NameAndType_info signatures more aggressively
95 // - to disallow argument and require ACC_STATIC for <clinit> methods
96 #define JAVA_7_VERSION 51
97
98 // Extension method support.
99 #define JAVA_8_VERSION 52
100
101 void ClassFileParser::parse_constant_pool_entries(int length, TRAPS) {
102 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
103 // this function (_current can be allocated in a register, with scalar
104 // replacement of aggregates). The _current pointer is copied back to
105 // stream() when this function returns. DON'T call another method within
106 // this method that uses stream().
107 ClassFileStream* cfs0 = stream();
108 ClassFileStream cfs1 = *cfs0;
109 ClassFileStream* cfs = &cfs1;
110 #ifdef ASSERT
111 assert(cfs->allocated_on_stack(),"should be local");
112 u1* old_current = cfs0->current();
113 #endif
114 Handle class_loader(THREAD, _loader_data->class_loader());
115
116 // Used for batching symbol allocations.
117 const char* names[SymbolTable::symbol_alloc_batch_size];
118 int lengths[SymbolTable::symbol_alloc_batch_size];
119 int indices[SymbolTable::symbol_alloc_batch_size];
120 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
121 int names_count = 0;
122
123 // parsing Index 0 is unused
124 for (int index = 1; index < length; index++) {
125 // Each of the following case guarantees one more byte in the stream
126 // for the following tag or the access_flags following constant pool,
127 // so we don't need bounds-check for reading tag.
128 u1 tag = cfs->get_u1_fast();
129 switch (tag) {
130 case JVM_CONSTANT_Class :
131 {
132 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
133 u2 name_index = cfs->get_u2_fast();
134 _cp->klass_index_at_put(index, name_index);
135 }
136 break;
137 case JVM_CONSTANT_Fieldref :
138 {
139 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
140 u2 class_index = cfs->get_u2_fast();
141 u2 name_and_type_index = cfs->get_u2_fast();
142 _cp->field_at_put(index, class_index, name_and_type_index);
143 }
144 break;
145 case JVM_CONSTANT_Methodref :
146 {
147 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
148 u2 class_index = cfs->get_u2_fast();
149 u2 name_and_type_index = cfs->get_u2_fast();
150 _cp->method_at_put(index, class_index, name_and_type_index);
151 }
152 break;
153 case JVM_CONSTANT_InterfaceMethodref :
154 {
155 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
156 u2 class_index = cfs->get_u2_fast();
157 u2 name_and_type_index = cfs->get_u2_fast();
158 _cp->interface_method_at_put(index, class_index, name_and_type_index);
159 }
160 break;
161 case JVM_CONSTANT_String :
162 {
163 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
164 u2 string_index = cfs->get_u2_fast();
165 _cp->string_index_at_put(index, string_index);
166 }
167 break;
168 case JVM_CONSTANT_MethodHandle :
169 case JVM_CONSTANT_MethodType :
170 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
171 classfile_parse_error(
172 "Class file version does not support constant tag %u in class file %s",
173 tag, CHECK);
174 }
175 if (tag == JVM_CONSTANT_MethodHandle) {
176 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
177 u1 ref_kind = cfs->get_u1_fast();
178 u2 method_index = cfs->get_u2_fast();
179 _cp->method_handle_index_at_put(index, ref_kind, method_index);
180 } else if (tag == JVM_CONSTANT_MethodType) {
181 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
182 u2 signature_index = cfs->get_u2_fast();
183 _cp->method_type_index_at_put(index, signature_index);
184 } else {
185 ShouldNotReachHere();
186 }
187 break;
188 case JVM_CONSTANT_InvokeDynamic :
189 {
190 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
191 classfile_parse_error(
192 "Class file version does not support constant tag %u in class file %s",
193 tag, CHECK);
194 }
195 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
196 u2 bootstrap_specifier_index = cfs->get_u2_fast();
197 u2 name_and_type_index = cfs->get_u2_fast();
198 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index)
199 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
200 _cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
201 }
202 break;
203 case JVM_CONSTANT_Integer :
204 {
205 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
206 u4 bytes = cfs->get_u4_fast();
207 _cp->int_at_put(index, (jint) bytes);
208 }
209 break;
210 case JVM_CONSTANT_Float :
211 {
212 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
213 u4 bytes = cfs->get_u4_fast();
214 _cp->float_at_put(index, *(jfloat*)&bytes);
215 }
216 break;
217 case JVM_CONSTANT_Long :
218 // A mangled type might cause you to overrun allocated memory
219 guarantee_property(index+1 < length,
220 "Invalid constant pool entry %u in class file %s",
221 index, CHECK);
222 {
223 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
224 u8 bytes = cfs->get_u8_fast();
225 _cp->long_at_put(index, bytes);
226 }
227 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
228 break;
229 case JVM_CONSTANT_Double :
230 // A mangled type might cause you to overrun allocated memory
231 guarantee_property(index+1 < length,
232 "Invalid constant pool entry %u in class file %s",
233 index, CHECK);
234 {
235 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
236 u8 bytes = cfs->get_u8_fast();
237 _cp->double_at_put(index, *(jdouble*)&bytes);
238 }
239 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
240 break;
241 case JVM_CONSTANT_NameAndType :
242 {
243 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
244 u2 name_index = cfs->get_u2_fast();
245 u2 signature_index = cfs->get_u2_fast();
246 _cp->name_and_type_at_put(index, name_index, signature_index);
247 }
248 break;
249 case JVM_CONSTANT_Utf8 :
250 {
251 cfs->guarantee_more(2, CHECK); // utf8_length
252 u2 utf8_length = cfs->get_u2_fast();
253 u1* utf8_buffer = cfs->get_u1_buffer();
254 assert(utf8_buffer != NULL, "null utf8 buffer");
255 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
256 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
257 cfs->skip_u1_fast(utf8_length);
258
259 // Before storing the symbol, make sure it's legal
260 if (_need_verify) {
261 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
262 }
263
264 if (has_cp_patch_at(index)) {
265 Handle patch = clear_cp_patch_at(index);
266 guarantee_property(java_lang_String::is_instance(patch()),
267 "Illegal utf8 patch at %d in class file %s",
268 index, CHECK);
269 char* str = java_lang_String::as_utf8_string(patch());
270 // (could use java_lang_String::as_symbol instead, but might as well batch them)
271 utf8_buffer = (u1*) str;
272 utf8_length = (int) strlen(str);
273 }
274
275 unsigned int hash;
276 Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
277 if (result == NULL) {
278 names[names_count] = (char*)utf8_buffer;
279 lengths[names_count] = utf8_length;
280 indices[names_count] = index;
281 hashValues[names_count++] = hash;
282 if (names_count == SymbolTable::symbol_alloc_batch_size) {
283 SymbolTable::new_symbols(_loader_data, _cp, names_count, names, lengths, indices, hashValues, CHECK);
284 names_count = 0;
285 }
286 } else {
287 _cp->symbol_at_put(index, result);
288 }
289 }
290 break;
291 default:
292 classfile_parse_error(
293 "Unknown constant tag %u in class file %s", tag, CHECK);
294 break;
295 }
296 }
297
298 // Allocate the remaining symbols
299 if (names_count > 0) {
300 SymbolTable::new_symbols(_loader_data, _cp, names_count, names, lengths, indices, hashValues, CHECK);
301 }
302
303 // Copy _current pointer of local copy back to stream().
304 #ifdef ASSERT
305 assert(cfs0->current() == old_current, "non-exclusive use of stream()");
306 #endif
307 cfs0->set_current(cfs1.current());
308 }
309
310 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
311
312 inline Symbol* check_symbol_at(constantPoolHandle cp, int index) {
313 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8())
314 return cp->symbol_at(index);
315 else
316 return NULL;
317 }
318
319 #ifdef ASSERT
320 PRAGMA_DIAG_PUSH
321 PRAGMA_FORMAT_NONLITERAL_IGNORED
322 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) {
323 ResourceMark rm(THREAD);
324 fatal(msg, _class_name->as_C_string());
325 }
326
327 void ClassFileParser::report_assert_property_failure(const char* msg, int index, TRAPS) {
328 ResourceMark rm(THREAD);
329 fatal(msg, index, _class_name->as_C_string());
330 }
331 PRAGMA_DIAG_POP
332 #endif
333
334 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) {
335 ClassFileStream* cfs = stream();
336 constantPoolHandle nullHandle;
337
338 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
339 u2 length = cfs->get_u2_fast();
340 guarantee_property(
341 length >= 1, "Illegal constant pool size %u in class file %s",
342 length, CHECK_(nullHandle));
343 ConstantPool* constant_pool = ConstantPool::allocate(_loader_data, length,
344 CHECK_(nullHandle));
345 _cp = constant_pool; // save in case of errors
346 constantPoolHandle cp (THREAD, constant_pool);
347
348 // parsing constant pool entries
349 parse_constant_pool_entries(length, CHECK_(nullHandle));
350
351 int index = 1; // declared outside of loops for portability
352
353 // first verification pass - validate cross references and fixup class and string constants
354 for (index = 1; index < length; index++) { // Index 0 is unused
355 jbyte tag = cp->tag_at(index).value();
356 switch (tag) {
357 case JVM_CONSTANT_Class :
358 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
359 break;
360 case JVM_CONSTANT_Fieldref :
361 // fall through
362 case JVM_CONSTANT_Methodref :
363 // fall through
364 case JVM_CONSTANT_InterfaceMethodref : {
365 if (!_need_verify) break;
366 int klass_ref_index = cp->klass_ref_index_at(index);
367 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
368 check_property(valid_klass_reference_at(klass_ref_index),
369 "Invalid constant pool index %u in class file %s",
370 klass_ref_index,
371 CHECK_(nullHandle));
372 check_property(valid_cp_range(name_and_type_ref_index, length) &&
373 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
374 "Invalid constant pool index %u in class file %s",
375 name_and_type_ref_index,
376 CHECK_(nullHandle));
377 break;
378 }
379 case JVM_CONSTANT_String :
380 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
381 break;
382 case JVM_CONSTANT_Integer :
383 break;
384 case JVM_CONSTANT_Float :
385 break;
386 case JVM_CONSTANT_Long :
387 case JVM_CONSTANT_Double :
388 index++;
389 check_property(
390 (index < length && cp->tag_at(index).is_invalid()),
391 "Improper constant pool long/double index %u in class file %s",
392 index, CHECK_(nullHandle));
393 break;
394 case JVM_CONSTANT_NameAndType : {
395 if (!_need_verify) break;
396 int name_ref_index = cp->name_ref_index_at(index);
397 int signature_ref_index = cp->signature_ref_index_at(index);
398 check_property(valid_symbol_at(name_ref_index),
399 "Invalid constant pool index %u in class file %s",
400 name_ref_index, CHECK_(nullHandle));
401 check_property(valid_symbol_at(signature_ref_index),
402 "Invalid constant pool index %u in class file %s",
403 signature_ref_index, CHECK_(nullHandle));
404 break;
405 }
406 case JVM_CONSTANT_Utf8 :
407 break;
408 case JVM_CONSTANT_UnresolvedClass : // fall-through
409 case JVM_CONSTANT_UnresolvedClassInError:
410 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
411 break;
412 case JVM_CONSTANT_ClassIndex :
413 {
414 int class_index = cp->klass_index_at(index);
415 check_property(valid_symbol_at(class_index),
416 "Invalid constant pool index %u in class file %s",
417 class_index, CHECK_(nullHandle));
418 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
419 }
420 break;
421 case JVM_CONSTANT_StringIndex :
422 {
423 int string_index = cp->string_index_at(index);
424 check_property(valid_symbol_at(string_index),
425 "Invalid constant pool index %u in class file %s",
426 string_index, CHECK_(nullHandle));
427 Symbol* sym = cp->symbol_at(string_index);
428 cp->unresolved_string_at_put(index, sym);
429 }
430 break;
431 case JVM_CONSTANT_MethodHandle :
432 {
433 int ref_index = cp->method_handle_index_at(index);
434 check_property(
435 valid_cp_range(ref_index, length),
436 "Invalid constant pool index %u in class file %s",
437 ref_index, CHECK_(nullHandle));
438 constantTag tag = cp->tag_at(ref_index);
439 int ref_kind = cp->method_handle_ref_kind_at(index);
440 switch (ref_kind) {
441 case JVM_REF_getField:
442 case JVM_REF_getStatic:
443 case JVM_REF_putField:
444 case JVM_REF_putStatic:
445 check_property(
446 tag.is_field(),
447 "Invalid constant pool index %u in class file %s (not a field)",
448 ref_index, CHECK_(nullHandle));
449 break;
450 case JVM_REF_invokeVirtual:
451 case JVM_REF_newInvokeSpecial:
452 check_property(
453 tag.is_method(),
454 "Invalid constant pool index %u in class file %s (not a method)",
455 ref_index, CHECK_(nullHandle));
456 break;
457 case JVM_REF_invokeStatic:
458 case JVM_REF_invokeSpecial:
459 check_property(tag.is_method() ||
460 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
461 "Invalid constant pool index %u in class file %s (not a method)",
462 ref_index, CHECK_(nullHandle));
463 break;
464 case JVM_REF_invokeInterface:
465 check_property(
466 tag.is_interface_method(),
467 "Invalid constant pool index %u in class file %s (not an interface method)",
468 ref_index, CHECK_(nullHandle));
469 break;
470 default:
471 classfile_parse_error(
472 "Bad method handle kind at constant pool index %u in class file %s",
473 index, CHECK_(nullHandle));
474 }
475 // Keep the ref_index unchanged. It will be indirected at link-time.
476 }
477 break;
478 case JVM_CONSTANT_MethodType :
479 {
480 int ref_index = cp->method_type_index_at(index);
481 check_property(valid_symbol_at(ref_index),
482 "Invalid constant pool index %u in class file %s",
483 ref_index, CHECK_(nullHandle));
484 }
485 break;
486 case JVM_CONSTANT_InvokeDynamic :
487 {
488 int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index);
489 check_property(valid_cp_range(name_and_type_ref_index, length) &&
490 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
491 "Invalid constant pool index %u in class file %s",
492 name_and_type_ref_index,
493 CHECK_(nullHandle));
494 // bootstrap specifier index must be checked later, when BootstrapMethods attr is available
495 break;
496 }
497 default:
498 fatal("bad constant pool tag value %u", cp->tag_at(index).value());
499 ShouldNotReachHere();
500 break;
501 } // end of switch
502 } // end of for
503
504 if (_cp_patches != NULL) {
505 // need to treat this_class specially...
506 int this_class_index;
507 {
508 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
509 u1* mark = cfs->current();
510 u2 flags = cfs->get_u2_fast();
511 this_class_index = cfs->get_u2_fast();
512 cfs->set_current(mark); // revert to mark
513 }
514
515 for (index = 1; index < length; index++) { // Index 0 is unused
516 if (has_cp_patch_at(index)) {
517 guarantee_property(index != this_class_index,
518 "Illegal constant pool patch to self at %d in class file %s",
519 index, CHECK_(nullHandle));
520 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
521 }
522 }
523 }
524
525 if (!_need_verify) {
526 return cp;
527 }
528
529 // second verification pass - checks the strings are of the right format.
530 // but not yet to the other entries
531 for (index = 1; index < length; index++) {
532 jbyte tag = cp->tag_at(index).value();
533 switch (tag) {
534 case JVM_CONSTANT_UnresolvedClass: {
535 Symbol* class_name = cp->klass_name_at(index);
536 // check the name, even if _cp_patches will overwrite it
537 verify_legal_class_name(class_name, CHECK_(nullHandle));
538 break;
539 }
540 case JVM_CONSTANT_NameAndType: {
541 if (_need_verify && _major_version >= JAVA_7_VERSION) {
542 int sig_index = cp->signature_ref_index_at(index);
543 int name_index = cp->name_ref_index_at(index);
544 Symbol* name = cp->symbol_at(name_index);
545 Symbol* sig = cp->symbol_at(sig_index);
546 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
547 verify_legal_method_signature(name, sig, CHECK_(nullHandle));
548 } else {
549 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
550 }
551 }
552 break;
553 }
554 case JVM_CONSTANT_InvokeDynamic:
555 case JVM_CONSTANT_Fieldref:
556 case JVM_CONSTANT_Methodref:
557 case JVM_CONSTANT_InterfaceMethodref: {
558 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
559 // already verified to be utf8
560 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
561 // already verified to be utf8
562 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
563 Symbol* name = cp->symbol_at(name_ref_index);
564 Symbol* signature = cp->symbol_at(signature_ref_index);
565 if (tag == JVM_CONSTANT_Fieldref) {
566 verify_legal_field_name(name, CHECK_(nullHandle));
567 if (_need_verify && _major_version >= JAVA_7_VERSION) {
568 // Signature is verified above, when iterating NameAndType_info.
569 // Need only to be sure it's the right type.
570 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
571 throwIllegalSignature(
572 "Field", name, signature, CHECK_(nullHandle));
573 }
574 } else {
575 verify_legal_field_signature(name, signature, CHECK_(nullHandle));
576 }
577 } else {
578 verify_legal_method_name(name, CHECK_(nullHandle));
579 if (_need_verify && _major_version >= JAVA_7_VERSION) {
580 // Signature is verified above, when iterating NameAndType_info.
581 // Need only to be sure it's the right type.
582 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
583 throwIllegalSignature(
584 "Method", name, signature, CHECK_(nullHandle));
585 }
586 } else {
587 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
588 }
589 if (tag == JVM_CONSTANT_Methodref) {
590 // 4509014: If a class method name begins with '<', it must be "<init>".
591 assert(name != NULL, "method name in constant pool is null");
592 unsigned int name_len = name->utf8_length();
593 assert(name_len > 0, "bad method name"); // already verified as legal name
594 if (name->byte_at(0) == '<') {
595 if (name != vmSymbols::object_initializer_name()) {
596 classfile_parse_error(
597 "Bad method name at constant pool index %u in class file %s",
598 name_ref_index, CHECK_(nullHandle));
599 }
600 }
601 }
602 }
603 break;
604 }
605 case JVM_CONSTANT_MethodHandle: {
606 int ref_index = cp->method_handle_index_at(index);
607 int ref_kind = cp->method_handle_ref_kind_at(index);
608 switch (ref_kind) {
609 case JVM_REF_invokeVirtual:
610 case JVM_REF_invokeStatic:
611 case JVM_REF_invokeSpecial:
612 case JVM_REF_newInvokeSpecial:
613 {
614 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index);
615 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
616 Symbol* name = cp->symbol_at(name_ref_index);
617 if (ref_kind == JVM_REF_newInvokeSpecial) {
618 if (name != vmSymbols::object_initializer_name()) {
619 classfile_parse_error(
620 "Bad constructor name at constant pool index %u in class file %s",
621 name_ref_index, CHECK_(nullHandle));
622 }
623 } else {
624 if (name == vmSymbols::object_initializer_name()) {
625 classfile_parse_error(
626 "Bad method name at constant pool index %u in class file %s",
627 name_ref_index, CHECK_(nullHandle));
628 }
629 }
630 }
631 break;
632 // Other ref_kinds are already fully checked in previous pass.
633 }
634 break;
635 }
636 case JVM_CONSTANT_MethodType: {
637 Symbol* no_name = vmSymbols::type_name(); // place holder
638 Symbol* signature = cp->method_type_signature_at(index);
639 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
640 break;
641 }
642 case JVM_CONSTANT_Utf8: {
643 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
644 }
645 } // end of switch
646 } // end of for
647
648 return cp;
649 }
650
651
652 void ClassFileParser::patch_constant_pool(const constantPoolHandle& cp, int index, Handle patch, TRAPS) {
653 BasicType patch_type = T_VOID;
654
655 switch (cp->tag_at(index).value()) {
656
657 case JVM_CONSTANT_UnresolvedClass :
658 // Patching a class means pre-resolving it.
659 // The name in the constant pool is ignored.
660 if (java_lang_Class::is_instance(patch())) {
661 guarantee_property(!java_lang_Class::is_primitive(patch()),
662 "Illegal class patch at %d in class file %s",
663 index, CHECK);
664 cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
665 } else {
666 guarantee_property(java_lang_String::is_instance(patch()),
667 "Illegal class patch at %d in class file %s",
668 index, CHECK);
669 Symbol* name = java_lang_String::as_symbol(patch(), CHECK);
670 cp->unresolved_klass_at_put(index, name);
671 }
672 break;
673
674 case JVM_CONSTANT_String :
675 // skip this patch and don't clear it. Needs the oop array for resolved
676 // references to be created first.
677 return;
678
679 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim;
680 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim;
681 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim;
682 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim;
683 patch_prim:
684 {
685 jvalue value;
686 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
687 guarantee_property(value_type == patch_type,
688 "Illegal primitive patch at %d in class file %s",
689 index, CHECK);
690 switch (value_type) {
691 case T_INT: cp->int_at_put(index, value.i); break;
692 case T_FLOAT: cp->float_at_put(index, value.f); break;
693 case T_LONG: cp->long_at_put(index, value.j); break;
694 case T_DOUBLE: cp->double_at_put(index, value.d); break;
695 default: assert(false, "");
696 }
697 }
698 break;
699
700 default:
701 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
702 guarantee_property(!has_cp_patch_at(index),
703 "Illegal unexpected patch at %d in class file %s",
704 index, CHECK);
705 return;
706 }
707
708 // On fall-through, mark the patch as used.
709 clear_cp_patch_at(index);
710 }
711
712
713 class NameSigHash: public ResourceObj {
714 public:
715 Symbol* _name; // name
716 Symbol* _sig; // signature
717 NameSigHash* _next; // Next entry in hash table
718 };
719
720
721 #define HASH_ROW_SIZE 256
722
723 unsigned int hash(Symbol* name, Symbol* sig) {
724 unsigned int raw_hash = 0;
725 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
726 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
727
728 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
729 }
730
731
732 void initialize_hashtable(NameSigHash** table) {
733 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
734 }
735
736 // Return false if the name/sig combination is found in table.
737 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
738 // The old format checker uses heap sort to find duplicates.
739 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
740 // of table since we don't expect Symbol*'s to move.
741 bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) {
742 assert(name != NULL, "name in constant pool is NULL");
743
744 // First lookup for duplicates
745 int index = hash(name, sig);
746 NameSigHash* entry = table[index];
747 while (entry != NULL) {
748 if (entry->_name == name && entry->_sig == sig) {
749 return false;
750 }
751 entry = entry->_next;
752 }
753
754 // No duplicate is found, allocate a new entry and fill it.
755 entry = new NameSigHash();
756 entry->_name = name;
757 entry->_sig = sig;
758
759 // Insert into hash table
760 entry->_next = table[index];
761 table[index] = entry;
762
763 return true;
764 }
765
766
767 Array<Klass*>* ClassFileParser::parse_interfaces(int length,
768 Handle protection_domain,
769 Symbol* class_name,
770 bool* has_default_methods,
771 TRAPS) {
772 if (length == 0) {
773 _local_interfaces = Universe::the_empty_klass_array();
774 } else {
775 ClassFileStream* cfs = stream();
776 assert(length > 0, "only called for length>0");
777 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, length, NULL, CHECK_NULL);
778
779 int index;
780 for (index = 0; index < length; index++) {
781 u2 interface_index = cfs->get_u2(CHECK_NULL);
782 KlassHandle interf;
783 check_property(
784 valid_klass_reference_at(interface_index),
785 "Interface name has bad constant pool index %u in class file %s",
786 interface_index, CHECK_NULL);
787 if (_cp->tag_at(interface_index).is_klass()) {
788 interf = KlassHandle(THREAD, _cp->resolved_klass_at(interface_index));
789 } else {
790 Symbol* unresolved_klass = _cp->klass_name_at(interface_index);
791
792 // Don't need to check legal name because it's checked when parsing constant pool.
793 // But need to make sure it's not an array type.
794 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
795 "Bad interface name in class file %s", CHECK_NULL);
796 Handle class_loader(THREAD, _loader_data->class_loader());
797
798 // Call resolve_super so classcircularity is checked
799 Klass* k = SystemDictionary::resolve_super_or_fail(class_name,
800 unresolved_klass, class_loader, protection_domain,
801 false, CHECK_NULL);
802 interf = KlassHandle(THREAD, k);
803 }
804
805 if (!interf()->is_interface()) {
806 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", NULL);
807 }
808 if (InstanceKlass::cast(interf())->has_default_methods()) {
809 *has_default_methods = true;
810 }
811 _local_interfaces->at_put(index, interf());
812 }
813
814 if (!_need_verify || length <= 1) {
815 return _local_interfaces;
816 }
817
818 // Check if there's any duplicates in interfaces
819 ResourceMark rm(THREAD);
820 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
821 THREAD, NameSigHash*, HASH_ROW_SIZE);
822 initialize_hashtable(interface_names);
823 bool dup = false;
824 {
825 debug_only(No_Safepoint_Verifier nsv;)
826 for (index = 0; index < length; index++) {
827 Klass* k = _local_interfaces->at(index);
828 Symbol* name = k->name();
829 // If no duplicates, add (name, NULL) in hashtable interface_names.
830 if (!put_after_lookup(name, NULL, interface_names)) {
831 dup = true;
832 break;
833 }
834 }
835 }
836 if (dup) {
837 classfile_parse_error("Duplicate interface name in class file %s", CHECK_NULL);
838 }
839 }
840 return _local_interfaces;
841 }
842
843
844 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, TRAPS) {
845 // Make sure the constant pool entry is of a type appropriate to this field
846 guarantee_property(
847 (constantvalue_index > 0 &&
848 constantvalue_index < _cp->length()),
849 "Bad initial value index %u in ConstantValue attribute in class file %s",
850 constantvalue_index, CHECK);
851 constantTag value_type = _cp->tag_at(constantvalue_index);
852 switch ( _cp->basic_type_for_signature_at(signature_index) ) {
853 case T_LONG:
854 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
855 break;
856 case T_FLOAT:
857 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
858 break;
859 case T_DOUBLE:
860 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
861 break;
862 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
863 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
864 break;
865 case T_OBJECT:
866 guarantee_property((_cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
867 && value_type.is_string()),
868 "Bad string initial value in class file %s", CHECK);
869 break;
870 default:
871 classfile_parse_error(
872 "Unable to set initial value %u in class file %s",
873 constantvalue_index, CHECK);
874 }
875 }
876
877
878 // Parse attributes for a field.
879 void ClassFileParser::parse_field_attributes(u2 attributes_count,
880 bool is_static, u2 signature_index,
881 u2* constantvalue_index_addr,
882 bool* is_synthetic_addr,
883 u2* generic_signature_index_addr,
884 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
885 TRAPS) {
886 ClassFileStream* cfs = stream();
887 assert(attributes_count > 0, "length should be greater than 0");
888 u2 constantvalue_index = 0;
889 u2 generic_signature_index = 0;
890 bool is_synthetic = false;
891 u1* runtime_visible_annotations = NULL;
892 int runtime_visible_annotations_length = 0;
893 u1* runtime_invisible_annotations = NULL;
894 int runtime_invisible_annotations_length = 0;
895 u1* runtime_visible_type_annotations = NULL;
896 int runtime_visible_type_annotations_length = 0;
897 u1* runtime_invisible_type_annotations = NULL;
898 int runtime_invisible_type_annotations_length = 0;
899 bool runtime_invisible_annotations_exists = false;
900 bool runtime_invisible_type_annotations_exists = false;
901 while (attributes_count--) {
902 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
903 u2 attribute_name_index = cfs->get_u2_fast();
904 u4 attribute_length = cfs->get_u4_fast();
905 check_property(valid_symbol_at(attribute_name_index),
906 "Invalid field attribute index %u in class file %s",
907 attribute_name_index,
908 CHECK);
909 Symbol* attribute_name = _cp->symbol_at(attribute_name_index);
910 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
911 // ignore if non-static
912 if (constantvalue_index != 0) {
913 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
914 }
915 check_property(
916 attribute_length == 2,
917 "Invalid ConstantValue field attribute length %u in class file %s",
918 attribute_length, CHECK);
919 constantvalue_index = cfs->get_u2(CHECK);
920 if (_need_verify) {
921 verify_constantvalue(constantvalue_index, signature_index, CHECK);
922 }
923 } else if (attribute_name == vmSymbols::tag_synthetic()) {
924 if (attribute_length != 0) {
925 classfile_parse_error(
926 "Invalid Synthetic field attribute length %u in class file %s",
927 attribute_length, CHECK);
928 }
929 is_synthetic = true;
930 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
931 if (attribute_length != 0) {
932 classfile_parse_error(
933 "Invalid Deprecated field attribute length %u in class file %s",
934 attribute_length, CHECK);
935 }
936 } else if (_major_version >= JAVA_1_5_VERSION) {
937 if (attribute_name == vmSymbols::tag_signature()) {
938 if (attribute_length != 2) {
939 classfile_parse_error(
940 "Wrong size %u for field's Signature attribute in class file %s",
941 attribute_length, CHECK);
942 }
943 generic_signature_index = parse_generic_signature_attribute(CHECK);
944 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
945 if (runtime_visible_annotations != NULL) {
946 classfile_parse_error(
947 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
948 }
949 runtime_visible_annotations_length = attribute_length;
950 runtime_visible_annotations = cfs->get_u1_buffer();
951 assert(runtime_visible_annotations != NULL, "null visible annotations");
952 parse_annotations(runtime_visible_annotations,
953 runtime_visible_annotations_length,
954 parsed_annotations);
955 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
956 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
957 if (runtime_invisible_annotations_exists) {
958 classfile_parse_error(
959 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
960 }
961 runtime_invisible_annotations_exists = true;
962 if (PreserveAllAnnotations) {
963 runtime_invisible_annotations_length = attribute_length;
964 runtime_invisible_annotations = cfs->get_u1_buffer();
965 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
966 }
967 cfs->skip_u1(attribute_length, CHECK);
968 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
969 if (runtime_visible_type_annotations != NULL) {
970 classfile_parse_error(
971 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
972 }
973 runtime_visible_type_annotations_length = attribute_length;
974 runtime_visible_type_annotations = cfs->get_u1_buffer();
975 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
976 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
977 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
978 if (runtime_invisible_type_annotations_exists) {
979 classfile_parse_error(
980 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
981 } else {
982 runtime_invisible_type_annotations_exists = true;
983 }
984 if (PreserveAllAnnotations) {
985 runtime_invisible_type_annotations_length = attribute_length;
986 runtime_invisible_type_annotations = cfs->get_u1_buffer();
987 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
988 }
989 cfs->skip_u1(attribute_length, CHECK);
990 } else {
991 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
992 }
993 } else {
994 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
995 }
996 }
997
998 *constantvalue_index_addr = constantvalue_index;
999 *is_synthetic_addr = is_synthetic;
1000 *generic_signature_index_addr = generic_signature_index;
1001 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1002 runtime_visible_annotations_length,
1003 runtime_invisible_annotations,
1004 runtime_invisible_annotations_length,
1005 CHECK);
1006 parsed_annotations->set_field_annotations(a);
1007 a = assemble_annotations(runtime_visible_type_annotations,
1008 runtime_visible_type_annotations_length,
1009 runtime_invisible_type_annotations,
1010 runtime_invisible_type_annotations_length,
1011 CHECK);
1012 parsed_annotations->set_field_type_annotations(a);
1013 return;
1014 }
1015
1016
1017 // Field allocation types. Used for computing field offsets.
1018
1019 enum FieldAllocationType {
1020 STATIC_OOP, // Oops
1021 STATIC_BYTE, // Boolean, Byte, char
1022 STATIC_SHORT, // shorts
1023 STATIC_WORD, // ints
1024 STATIC_DOUBLE, // aligned long or double
1025 NONSTATIC_OOP,
1026 NONSTATIC_BYTE,
1027 NONSTATIC_SHORT,
1028 NONSTATIC_WORD,
1029 NONSTATIC_DOUBLE,
1030 MAX_FIELD_ALLOCATION_TYPE,
1031 BAD_ALLOCATION_TYPE = -1
1032 };
1033
1034 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1035 BAD_ALLOCATION_TYPE, // 0
1036 BAD_ALLOCATION_TYPE, // 1
1037 BAD_ALLOCATION_TYPE, // 2
1038 BAD_ALLOCATION_TYPE, // 3
1039 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1040 NONSTATIC_SHORT, // T_CHAR = 5,
1041 NONSTATIC_WORD, // T_FLOAT = 6,
1042 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1043 NONSTATIC_BYTE, // T_BYTE = 8,
1044 NONSTATIC_SHORT, // T_SHORT = 9,
1045 NONSTATIC_WORD, // T_INT = 10,
1046 NONSTATIC_DOUBLE, // T_LONG = 11,
1047 NONSTATIC_OOP, // T_OBJECT = 12,
1048 NONSTATIC_OOP, // T_ARRAY = 13,
1049 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1050 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1051 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1052 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1053 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1054 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1055 BAD_ALLOCATION_TYPE, // 0
1056 BAD_ALLOCATION_TYPE, // 1
1057 BAD_ALLOCATION_TYPE, // 2
1058 BAD_ALLOCATION_TYPE, // 3
1059 STATIC_BYTE , // T_BOOLEAN = 4,
1060 STATIC_SHORT, // T_CHAR = 5,
1061 STATIC_WORD, // T_FLOAT = 6,
1062 STATIC_DOUBLE, // T_DOUBLE = 7,
1063 STATIC_BYTE, // T_BYTE = 8,
1064 STATIC_SHORT, // T_SHORT = 9,
1065 STATIC_WORD, // T_INT = 10,
1066 STATIC_DOUBLE, // T_LONG = 11,
1067 STATIC_OOP, // T_OBJECT = 12,
1068 STATIC_OOP, // T_ARRAY = 13,
1069 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1070 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1071 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1072 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1073 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1074 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1075 };
1076
1077 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1078 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1079 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1080 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1081 return result;
1082 }
1083
1084 class FieldAllocationCount: public ResourceObj {
1085 public:
1086 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1087
1088 FieldAllocationCount() {
1089 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1090 count[i] = 0;
1091 }
1092 }
1093
1094 FieldAllocationType update(bool is_static, BasicType type) {
1095 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1096 // Make sure there is no overflow with injected fields.
1097 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1098 count[atype]++;
1099 return atype;
1100 }
1101 };
1102
1103 Array<u2>* ClassFileParser::parse_fields(Symbol* class_name,
1104 bool is_interface,
1105 FieldAllocationCount *fac,
1106 u2* java_fields_count_ptr, TRAPS) {
1107 ClassFileStream* cfs = stream();
1108 cfs->guarantee_more(2, CHECK_NULL); // length
1109 u2 length = cfs->get_u2_fast();
1110 *java_fields_count_ptr = length;
1111
1112 int num_injected = 0;
1113 InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected);
1114 int total_fields = length + num_injected;
1115
1116 // The field array starts with tuples of shorts
1117 // [access, name index, sig index, initial value index, byte offset].
1118 // A generic signature slot only exists for field with generic
1119 // signature attribute. And the access flag is set with
1120 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1121 // signature slots are at the end of the field array and after all
1122 // other fields data.
1123 //
1124 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1125 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1126 // ...
1127 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1128 // [generic signature index]
1129 // [generic signature index]
1130 // ...
1131 //
1132 // Allocate a temporary resource array for field data. For each field,
1133 // a slot is reserved in the temporary array for the generic signature
1134 // index. After parsing all fields, the data are copied to a permanent
1135 // array and any unused slots will be discarded.
1136 ResourceMark rm(THREAD);
1137 u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD(
1138 THREAD, u2, total_fields * (FieldInfo::field_slots + 1));
1139
1140 // The generic signature slots start after all other fields' data.
1141 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1142 int num_generic_signature = 0;
1143 for (int n = 0; n < length; n++) {
1144 cfs->guarantee_more(8, CHECK_NULL); // access_flags, name_index, descriptor_index, attributes_count
1145
1146 AccessFlags access_flags;
1147 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1148 verify_legal_field_modifiers(flags, is_interface, CHECK_NULL);
1149 access_flags.set_flags(flags);
1150
1151 u2 name_index = cfs->get_u2_fast();
1152 int cp_size = _cp->length();
1153 check_property(valid_symbol_at(name_index),
1154 "Invalid constant pool index %u for field name in class file %s",
1155 name_index,
1156 CHECK_NULL);
1157 Symbol* name = _cp->symbol_at(name_index);
1158 verify_legal_field_name(name, CHECK_NULL);
1159
1160 u2 signature_index = cfs->get_u2_fast();
1161 check_property(valid_symbol_at(signature_index),
1162 "Invalid constant pool index %u for field signature in class file %s",
1163 signature_index, CHECK_NULL);
1164 Symbol* sig = _cp->symbol_at(signature_index);
1165 verify_legal_field_signature(name, sig, CHECK_NULL);
1166
1167 u2 constantvalue_index = 0;
1168 bool is_synthetic = false;
1169 u2 generic_signature_index = 0;
1170 bool is_static = access_flags.is_static();
1171 FieldAnnotationCollector parsed_annotations(_loader_data);
1172
1173 u2 attributes_count = cfs->get_u2_fast();
1174 if (attributes_count > 0) {
1175 parse_field_attributes(attributes_count, is_static, signature_index,
1176 &constantvalue_index, &is_synthetic,
1177 &generic_signature_index, &parsed_annotations,
1178 CHECK_NULL);
1179 if (parsed_annotations.field_annotations() != NULL) {
1180 if (_fields_annotations == NULL) {
1181 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1182 _loader_data, length, NULL,
1183 CHECK_NULL);
1184 }
1185 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1186 parsed_annotations.set_field_annotations(NULL);
1187 }
1188 if (parsed_annotations.field_type_annotations() != NULL) {
1189 if (_fields_type_annotations == NULL) {
1190 _fields_type_annotations = MetadataFactory::new_array<AnnotationArray*>(
1191 _loader_data, length, NULL,
1192 CHECK_NULL);
1193 }
1194 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1195 parsed_annotations.set_field_type_annotations(NULL);
1196 }
1197
1198 if (is_synthetic) {
1199 access_flags.set_is_synthetic();
1200 }
1201 if (generic_signature_index != 0) {
1202 access_flags.set_field_has_generic_signature();
1203 fa[generic_signature_slot] = generic_signature_index;
1204 generic_signature_slot ++;
1205 num_generic_signature ++;
1206 }
1207 }
1208
1209 FieldInfo* field = FieldInfo::from_field_array(fa, n);
1210 field->initialize(access_flags.as_short(),
1211 name_index,
1212 signature_index,
1213 constantvalue_index);
1214 BasicType type = _cp->basic_type_for_signature_at(signature_index);
1215
1216 // Remember how many oops we encountered and compute allocation type
1217 FieldAllocationType atype = fac->update(is_static, type);
1218 field->set_allocation_type(atype);
1219
1220 // After field is initialized with type, we can augment it with aux info
1221 if (parsed_annotations.has_any_annotations())
1222 parsed_annotations.apply_to(field);
1223 }
1224
1225 int index = length;
1226 if (num_injected != 0) {
1227 for (int n = 0; n < num_injected; n++) {
1228 // Check for duplicates
1229 if (injected[n].may_be_java) {
1230 Symbol* name = injected[n].name();
1231 Symbol* signature = injected[n].signature();
1232 bool duplicate = false;
1233 for (int i = 0; i < length; i++) {
1234 FieldInfo* f = FieldInfo::from_field_array(fa, i);
1235 if (name == _cp->symbol_at(f->name_index()) &&
1236 signature == _cp->symbol_at(f->signature_index())) {
1237 // Symbol is desclared in Java so skip this one
1238 duplicate = true;
1239 break;
1240 }
1241 }
1242 if (duplicate) {
1243 // These will be removed from the field array at the end
1244 continue;
1245 }
1246 }
1247
1248 // Injected field
1249 FieldInfo* field = FieldInfo::from_field_array(fa, index);
1250 field->initialize(JVM_ACC_FIELD_INTERNAL,
1251 injected[n].name_index,
1252 injected[n].signature_index,
1253 0);
1254
1255 BasicType type = FieldType::basic_type(injected[n].signature());
1256
1257 // Remember how many oops we encountered and compute allocation type
1258 FieldAllocationType atype = fac->update(false, type);
1259 field->set_allocation_type(atype);
1260 index++;
1261 }
1262 }
1263
1264 // Now copy the fields' data from the temporary resource array.
1265 // Sometimes injected fields already exist in the Java source so
1266 // the fields array could be too long. In that case the
1267 // fields array is trimed. Also unused slots that were reserved
1268 // for generic signature indexes are discarded.
1269 Array<u2>* fields = MetadataFactory::new_array<u2>(
1270 _loader_data, index * FieldInfo::field_slots + num_generic_signature,
1271 CHECK_NULL);
1272 _fields = fields; // save in case of error
1273 {
1274 int i = 0;
1275 for (; i < index * FieldInfo::field_slots; i++) {
1276 fields->at_put(i, fa[i]);
1277 }
1278 for (int j = total_fields * FieldInfo::field_slots;
1279 j < generic_signature_slot; j++) {
1280 fields->at_put(i++, fa[j]);
1281 }
1282 assert(i == fields->length(), "");
1283 }
1284
1285 if (_need_verify && length > 1) {
1286 // Check duplicated fields
1287 ResourceMark rm(THREAD);
1288 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1289 THREAD, NameSigHash*, HASH_ROW_SIZE);
1290 initialize_hashtable(names_and_sigs);
1291 bool dup = false;
1292 {
1293 debug_only(No_Safepoint_Verifier nsv;)
1294 for (AllFieldStream fs(fields, _cp); !fs.done(); fs.next()) {
1295 Symbol* name = fs.name();
1296 Symbol* sig = fs.signature();
1297 // If no duplicates, add name/signature in hashtable names_and_sigs.
1298 if (!put_after_lookup(name, sig, names_and_sigs)) {
1299 dup = true;
1300 break;
1301 }
1302 }
1303 }
1304 if (dup) {
1305 classfile_parse_error("Duplicate field name&signature in class file %s",
1306 CHECK_NULL);
1307 }
1308 }
1309
1310 return fields;
1311 }
1312
1313
1314 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1315 while (length-- > 0) {
1316 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1317 }
1318 }
1319
1320
1321 u2* ClassFileParser::parse_exception_table(u4 code_length,
1322 u4 exception_table_length,
1323 TRAPS) {
1324 ClassFileStream* cfs = stream();
1325
1326 u2* exception_table_start = cfs->get_u2_buffer();
1327 assert(exception_table_start != NULL, "null exception table");
1328 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, end_pc, handler_pc, catch_type_index
1329 // Will check legal target after parsing code array in verifier.
1330 if (_need_verify) {
1331 for (unsigned int i = 0; i < exception_table_length; i++) {
1332 u2 start_pc = cfs->get_u2_fast();
1333 u2 end_pc = cfs->get_u2_fast();
1334 u2 handler_pc = cfs->get_u2_fast();
1335 u2 catch_type_index = cfs->get_u2_fast();
1336 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1337 "Illegal exception table range in class file %s",
1338 CHECK_NULL);
1339 guarantee_property(handler_pc < code_length,
1340 "Illegal exception table handler in class file %s",
1341 CHECK_NULL);
1342 if (catch_type_index != 0) {
1343 guarantee_property(valid_klass_reference_at(catch_type_index),
1344 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1345 }
1346 }
1347 } else {
1348 cfs->skip_u2_fast(exception_table_length * 4);
1349 }
1350 return exception_table_start;
1351 }
1352
1353 void ClassFileParser::parse_linenumber_table(
1354 u4 code_attribute_length, u4 code_length,
1355 CompressedLineNumberWriteStream** write_stream, TRAPS) {
1356 ClassFileStream* cfs = stream();
1357 unsigned int num_entries = cfs->get_u2(CHECK);
1358
1359 // Each entry is a u2 start_pc, and a u2 line_number
1360 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1361
1362 // Verify line number attribute and table length
1363 check_property(
1364 code_attribute_length == sizeof(u2) + length_in_bytes,
1365 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1366
1367 cfs->guarantee_more(length_in_bytes, CHECK);
1368
1369 if ((*write_stream) == NULL) {
1370 if (length_in_bytes > fixed_buffer_size) {
1371 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1372 } else {
1373 (*write_stream) = new CompressedLineNumberWriteStream(
1374 linenumbertable_buffer, fixed_buffer_size);
1375 }
1376 }
1377
1378 while (num_entries-- > 0) {
1379 u2 bci = cfs->get_u2_fast(); // start_pc
1380 u2 line = cfs->get_u2_fast(); // line_number
1381 guarantee_property(bci < code_length,
1382 "Invalid pc in LineNumberTable in class file %s", CHECK);
1383 (*write_stream)->write_pair(bci, line);
1384 }
1385 }
1386
1387
1388 class LVT_Hash : public AllStatic {
1389 public:
1390
1391 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1392 /*
1393 * 3-tuple start_bci/length/slot has to be unique key,
1394 * so the following comparison seems to be redundant:
1395 * && elem->name_cp_index == entry->_elem->name_cp_index
1396 */
1397 return (e0.start_bci == e1.start_bci &&
1398 e0.length == e1.length &&
1399 e0.name_cp_index == e1.name_cp_index &&
1400 e0.slot == e1.slot);
1401 }
1402
1403 static unsigned int hash(LocalVariableTableElement const& e0) {
1404 unsigned int raw_hash = e0.start_bci;
1405
1406 raw_hash = e0.length + raw_hash * 37;
1407 raw_hash = e0.name_cp_index + raw_hash * 37;
1408 raw_hash = e0.slot + raw_hash * 37;
1409
1410 return raw_hash;
1411 }
1412 };
1413
1414
1415 // Class file LocalVariableTable elements.
1416 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1417 public:
1418 u2 start_bci;
1419 u2 length;
1420 u2 name_cp_index;
1421 u2 descriptor_cp_index;
1422 u2 slot;
1423 };
1424
1425 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1426 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1427 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1428 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1429 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1430 lvt->signature_cp_index = 0;
1431 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1432 }
1433
1434 // Function is used to parse both attributes:
1435 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1436 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1437 u2 max_locals,
1438 u4 code_attribute_length,
1439 u2* localvariable_table_length,
1440 bool isLVTT,
1441 TRAPS) {
1442 ClassFileStream* cfs = stream();
1443 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1444 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1445 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1446 // Verify local variable table attribute has right length
1447 if (_need_verify) {
1448 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1449 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1450 }
1451 u2* localvariable_table_start = cfs->get_u2_buffer();
1452 assert(localvariable_table_start != NULL, "null local variable table");
1453 if (!_need_verify) {
1454 cfs->skip_u2_fast(size);
1455 } else {
1456 cfs->guarantee_more(size * 2, CHECK_NULL);
1457 for(int i = 0; i < (*localvariable_table_length); i++) {
1458 u2 start_pc = cfs->get_u2_fast();
1459 u2 length = cfs->get_u2_fast();
1460 u2 name_index = cfs->get_u2_fast();
1461 u2 descriptor_index = cfs->get_u2_fast();
1462 u2 index = cfs->get_u2_fast();
1463 // Assign to a u4 to avoid overflow
1464 u4 end_pc = (u4)start_pc + (u4)length;
1465
1466 if (start_pc >= code_length) {
1467 classfile_parse_error(
1468 "Invalid start_pc %u in %s in class file %s",
1469 start_pc, tbl_name, CHECK_NULL);
1470 }
1471 if (end_pc > code_length) {
1472 classfile_parse_error(
1473 "Invalid length %u in %s in class file %s",
1474 length, tbl_name, CHECK_NULL);
1475 }
1476 int cp_size = _cp->length();
1477 guarantee_property(valid_symbol_at(name_index),
1478 "Name index %u in %s has bad constant type in class file %s",
1479 name_index, tbl_name, CHECK_NULL);
1480 guarantee_property(valid_symbol_at(descriptor_index),
1481 "Signature index %u in %s has bad constant type in class file %s",
1482 descriptor_index, tbl_name, CHECK_NULL);
1483
1484 Symbol* name = _cp->symbol_at(name_index);
1485 Symbol* sig = _cp->symbol_at(descriptor_index);
1486 verify_legal_field_name(name, CHECK_NULL);
1487 u2 extra_slot = 0;
1488 if (!isLVTT) {
1489 verify_legal_field_signature(name, sig, CHECK_NULL);
1490
1491 // 4894874: check special cases for double and long local variables
1492 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1493 sig == vmSymbols::type_signature(T_LONG)) {
1494 extra_slot = 1;
1495 }
1496 }
1497 guarantee_property((index + extra_slot) < max_locals,
1498 "Invalid index %u in %s in class file %s",
1499 index, tbl_name, CHECK_NULL);
1500 }
1501 }
1502 return localvariable_table_start;
1503 }
1504
1505
1506 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1507 u1* u1_array, u2* u2_array, TRAPS) {
1508 ClassFileStream* cfs = stream();
1509 u2 index = 0; // index in the array with long/double occupying two slots
1510 u4 i1 = *u1_index;
1511 u4 i2 = *u2_index + 1;
1512 for(int i = 0; i < array_length; i++) {
1513 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1514 index++;
1515 if (tag == ITEM_Long || tag == ITEM_Double) {
1516 index++;
1517 } else if (tag == ITEM_Object) {
1518 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1519 guarantee_property(valid_klass_reference_at(class_index),
1520 "Bad class index %u in StackMap in class file %s",
1521 class_index, CHECK);
1522 } else if (tag == ITEM_Uninitialized) {
1523 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1524 guarantee_property(
1525 offset < code_length,
1526 "Bad uninitialized type offset %u in StackMap in class file %s",
1527 offset, CHECK);
1528 } else {
1529 guarantee_property(
1530 tag <= (u1)ITEM_Uninitialized,
1531 "Unknown variable type %u in StackMap in class file %s",
1532 tag, CHECK);
1533 }
1534 }
1535 u2_array[*u2_index] = index;
1536 *u1_index = i1;
1537 *u2_index = i2;
1538 }
1539
1540 u1* ClassFileParser::parse_stackmap_table(
1541 u4 code_attribute_length, TRAPS) {
1542 if (code_attribute_length == 0)
1543 return NULL;
1544
1545 ClassFileStream* cfs = stream();
1546 u1* stackmap_table_start = cfs->get_u1_buffer();
1547 assert(stackmap_table_start != NULL, "null stackmap table");
1548
1549 // check code_attribute_length first
1550 stream()->skip_u1(code_attribute_length, CHECK_NULL);
1551
1552 if (!_need_verify && !DumpSharedSpaces) {
1553 return NULL;
1554 }
1555 return stackmap_table_start;
1556 }
1557
1558 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1559 u4 method_attribute_length,
1560 TRAPS) {
1561 ClassFileStream* cfs = stream();
1562 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1563 *checked_exceptions_length = cfs->get_u2_fast();
1564 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1565 u2* checked_exceptions_start = cfs->get_u2_buffer();
1566 assert(checked_exceptions_start != NULL, "null checked exceptions");
1567 if (!_need_verify) {
1568 cfs->skip_u2_fast(size);
1569 } else {
1570 // Verify each value in the checked exception table
1571 u2 checked_exception;
1572 u2 len = *checked_exceptions_length;
1573 cfs->guarantee_more(2 * len, CHECK_NULL);
1574 for (int i = 0; i < len; i++) {
1575 checked_exception = cfs->get_u2_fast();
1576 check_property(
1577 valid_klass_reference_at(checked_exception),
1578 "Exception name has bad type at constant pool %u in class file %s",
1579 checked_exception, CHECK_NULL);
1580 }
1581 }
1582 // check exceptions attribute length
1583 if (_need_verify) {
1584 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1585 sizeof(u2) * size),
1586 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1587 }
1588 return checked_exceptions_start;
1589 }
1590
1591 void ClassFileParser::throwIllegalSignature(
1592 const char* type, Symbol* name, Symbol* sig, TRAPS) {
1593 ResourceMark rm(THREAD);
1594 Exceptions::fthrow(THREAD_AND_LOCATION,
1595 vmSymbols::java_lang_ClassFormatError(),
1596 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1597 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1598 }
1599
1600 // Skip an annotation. Return >=limit if there is any problem.
1601 int ClassFileParser::skip_annotation(u1* buffer, int limit, int index) {
1602 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1603 // value := switch (tag:u1) { ... }
1604 index += 2; // skip atype
1605 if ((index += 2) >= limit) return limit; // read nmem
1606 int nmem = Bytes::get_Java_u2(buffer+index-2);
1607 while (--nmem >= 0 && index < limit) {
1608 index += 2; // skip member
1609 index = skip_annotation_value(buffer, limit, index);
1610 }
1611 return index;
1612 }
1613
1614 // Skip an annotation value. Return >=limit if there is any problem.
1615 int ClassFileParser::skip_annotation_value(u1* buffer, int limit, int index) {
1616 // value := switch (tag:u1) {
1617 // case B, C, I, S, Z, D, F, J, c: con:u2;
1618 // case e: e_class:u2 e_name:u2;
1619 // case s: s_con:u2;
1620 // case [: do(nval:u2) {value};
1621 // case @: annotation;
1622 // case s: s_con:u2;
1623 // }
1624 if ((index += 1) >= limit) return limit; // read tag
1625 u1 tag = buffer[index-1];
1626 switch (tag) {
1627 case 'B': case 'C': case 'I': case 'S': case 'Z':
1628 case 'D': case 'F': case 'J': case 'c': case 's':
1629 index += 2; // skip con or s_con
1630 break;
1631 case 'e':
1632 index += 4; // skip e_class, e_name
1633 break;
1634 case '[':
1635 {
1636 if ((index += 2) >= limit) return limit; // read nval
1637 int nval = Bytes::get_Java_u2(buffer+index-2);
1638 while (--nval >= 0 && index < limit) {
1639 index = skip_annotation_value(buffer, limit, index);
1640 }
1641 }
1642 break;
1643 case '@':
1644 index = skip_annotation(buffer, limit, index);
1645 break;
1646 default:
1647 return limit; // bad tag byte
1648 }
1649 return index;
1650 }
1651
1652 // Sift through annotations, looking for those significant to the VM:
1653 void ClassFileParser::parse_annotations(u1* buffer, int limit,
1654 ClassFileParser::AnnotationCollector* coll) {
1655 // annotations := do(nann:u2) {annotation}
1656 int index = 0;
1657 if ((index += 2) >= limit) return; // read nann
1658 int nann = Bytes::get_Java_u2(buffer+index-2);
1659 enum { // initial annotation layout
1660 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1661 count_off = 2, // u2 such as 1 (one value)
1662 member_off = 4, // utf8 such as 'value'
1663 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1664 e_tag_val = 'e',
1665 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1666 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1667 e_size = 11, // end of 'e' annotation
1668 c_tag_val = 'c', // payload is type
1669 c_con_off = 7, // utf8 payload, such as 'I'
1670 c_size = 9, // end of 'c' annotation
1671 s_tag_val = 's', // payload is String
1672 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1673 s_size = 9,
1674 min_size = 6 // smallest possible size (zero members)
1675 };
1676 while ((--nann) >= 0 && (index-2 + min_size <= limit)) {
1677 int index0 = index;
1678 index = skip_annotation(buffer, limit, index);
1679 u1* abase = buffer + index0;
1680 int atype = Bytes::get_Java_u2(abase + atype_off);
1681 int count = Bytes::get_Java_u2(abase + count_off);
1682 Symbol* aname = check_symbol_at(_cp, atype);
1683 if (aname == NULL) break; // invalid annotation name
1684 Symbol* member = NULL;
1685 if (count >= 1) {
1686 int member_index = Bytes::get_Java_u2(abase + member_off);
1687 member = check_symbol_at(_cp, member_index);
1688 if (member == NULL) break; // invalid member name
1689 }
1690
1691 // Here is where parsing particular annotations will take place.
1692 AnnotationCollector::ID id = coll->annotation_index(_loader_data, aname);
1693 if (id == AnnotationCollector::_unknown) continue;
1694 coll->set_annotation(id);
1695
1696 if (id == AnnotationCollector::_sun_misc_Contended) {
1697 // @Contended can optionally specify the contention group.
1698 //
1699 // Contended group defines the equivalence class over the fields:
1700 // the fields within the same contended group are not treated distinct.
1701 // The only exception is default group, which does not incur the
1702 // equivalence. Naturally, contention group for classes is meaningless.
1703 //
1704 // While the contention group is specified as String, annotation
1705 // values are already interned, and we might as well use the constant
1706 // pool index as the group tag.
1707 //
1708 u2 group_index = 0; // default contended group
1709 if (count == 1
1710 && s_size == (index - index0) // match size
1711 && s_tag_val == *(abase + tag_off)
1712 && member == vmSymbols::value_name()) {
1713 group_index = Bytes::get_Java_u2(abase + s_con_off);
1714 if (_cp->symbol_at(group_index)->utf8_length() == 0) {
1715 group_index = 0; // default contended group
1716 }
1717 }
1718 coll->set_contended_group(group_index);
1719 }
1720 // The Accessor-Annotation specifies the field name it
1721 // belongs to. The index of the symbol is later stored in
1722 // the method.
1723 if (id == AnnotationCollector::_method_Accessor_Method) {
1724 u2 group_index = 0;
1725 if (count == 1
1726 && s_size == (index - index0) // match size
1727 && s_tag_val == *(abase + tag_off)
1728 && member == vmSymbols::value_name()) {
1729 group_index = Bytes::get_Java_u2(abase + s_con_off);
1730 if (_cp->symbol_at(group_index)->utf8_length() != 0) {
1731 coll->set_accessor_field_name(group_index);
1732 }
1733 }
1734 }
1735 }
1736 }
1737
1738 ClassFileParser::AnnotationCollector::ID
1739 ClassFileParser::AnnotationCollector::annotation_index(ClassLoaderData* loader_data,
1740 Symbol* name) {
1741 vmSymbols::SID sid = vmSymbols::find_sid(name);
1742 // Privileged code can use all annotations. Other code silently drops some.
1743 const bool privileged = loader_data->is_the_null_class_loader_data() ||
1744 loader_data->is_ext_class_loader_data() ||
1745 loader_data->is_anonymous();
1746 switch (sid) {
1747 case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_reflect_CallerSensitive_signature):
1748 if (_location != _in_method) break; // only allow for methods
1749 if (!privileged) break; // only allow in privileged code
1750 return _method_CallerSensitive;
1751 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_ForceInline_signature):
1752 if (_location != _in_method) break; // only allow for methods
1753 if (!privileged) break; // only allow in privileged code
1754 return _method_ForceInline;
1755 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_DontInline_signature):
1756 if (_location != _in_method) break; // only allow for methods
1757 if (!privileged) break; // only allow in privileged code
1758 return _method_DontInline;
1759 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature):
1760 if (_location != _in_method) break; // only allow for methods
1761 if (!privileged) break; // only allow in privileged code
1762 return _method_InjectedProfile;
1763 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature):
1764 if (_location != _in_method) break; // only allow for methods
1765 if (!privileged) break; // only allow in privileged code
1766 return _method_LambdaForm_Compiled;
1767 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature):
1768 if (_location != _in_method) break; // only allow for methods
1769 if (!privileged) break; // only allow in privileged code
1770 return _method_LambdaForm_Hidden;
1771 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature):
1772 if (_location != _in_method) break; // only allow for methods
1773 if (!privileged) break; // only allow in privileged code
1774 return _method_HotSpotIntrinsicCandidate;
1775 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_reflect_Accessor_signature):
1776 if (_location != _in_method) break; // only allow for methods
1777 return _method_Accessor_Method;
1778 #if INCLUDE_JVMCI
1779 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_vm_ci_hotspot_Stable_signature):
1780 if (_location != _in_field) break; // only allow for fields
1781 if (!privileged) break; // only allow in privileged code
1782 return _field_Stable;
1783 #endif
1784 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_Stable_signature):
1785 if (_location != _in_field) break; // only allow for fields
1786 if (!privileged) break; // only allow in privileged code
1787 return _field_Stable;
1788 case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_misc_Contended_signature):
1789 if (_location != _in_field && _location != _in_class) break; // only allow for fields and classes
1790 if (!EnableContended || (RestrictContended && !privileged)) break; // honor privileges
1791 return _sun_misc_Contended;
1792 default: break;
1793 }
1794 return AnnotationCollector::_unknown;
1795 }
1796
1797 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1798 if (is_contended())
1799 f->set_contended_group(contended_group());
1800 if (is_stable())
1801 f->set_stable(true);
1802 }
1803
1804 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
1805 // If there's an error deallocate metadata for field annotations
1806 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
1807 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
1808 }
1809
1810 void ClassFileParser::MethodAnnotationCollector::apply_to(methodHandle m) {
1811 if (has_annotation(_method_CallerSensitive))
1812 m->set_caller_sensitive(true);
1813 if (has_annotation(_method_ForceInline))
1814 m->set_force_inline(true);
1815 if (has_annotation(_method_DontInline))
1816 m->set_dont_inline(true);
1817 if (has_annotation(_method_InjectedProfile))
1818 m->set_has_injected_profile(true);
1819 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
1820 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
1821 if (has_annotation(_method_LambdaForm_Hidden))
1822 m->set_hidden(true);
1823 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
1824 m->set_intrinsic_candidate(true);
1825 if (is_accessor()) {
1826 m->set_accessor_field_name(accessor_field_name());
1827 }
1828 }
1829
1830 void ClassFileParser::ClassAnnotationCollector::apply_to(instanceKlassHandle k) {
1831 k->set_is_contended(is_contended());
1832 }
1833
1834
1835 #define MAX_ARGS_SIZE 255
1836 #define MAX_CODE_SIZE 65535
1837 #define INITIAL_MAX_LVT_NUMBER 256
1838
1839 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
1840 *
1841 * Rules for LVT's and LVTT's are:
1842 * - There can be any number of LVT's and LVTT's.
1843 * - If there are n LVT's, it is the same as if there was just
1844 * one LVT containing all the entries from the n LVT's.
1845 * - There may be no more than one LVT entry per local variable.
1846 * Two LVT entries are 'equal' if these fields are the same:
1847 * start_pc, length, name, slot
1848 * - There may be no more than one LVTT entry per each LVT entry.
1849 * Each LVTT entry has to match some LVT entry.
1850 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
1851 */
1852 void ClassFileParser::copy_localvariable_table(ConstMethod* cm,
1853 int lvt_cnt,
1854 u2* localvariable_table_length,
1855 u2** localvariable_table_start,
1856 int lvtt_cnt,
1857 u2* localvariable_type_table_length,
1858 u2** localvariable_type_table_start,
1859 TRAPS) {
1860
1861 ResourceMark rm(THREAD);
1862
1863 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
1864 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
1865
1866 LVT_HashTable* table = new LVT_HashTable();
1867
1868 // To fill LocalVariableTable in
1869 Classfile_LVT_Element* cf_lvt;
1870 LocalVariableTableElement* lvt = cm->localvariable_table_start();
1871
1872 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
1873 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
1874 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
1875 copy_lvt_element(&cf_lvt[idx], lvt);
1876 // If no duplicates, add LVT elem in hashtable.
1877 if (table->put(*lvt, lvt) == false
1878 && _need_verify
1879 && _major_version >= JAVA_1_5_VERSION) {
1880 classfile_parse_error("Duplicated LocalVariableTable attribute "
1881 "entry for '%s' in class file %s",
1882 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
1883 CHECK);
1884 }
1885 }
1886 }
1887
1888 // To merge LocalVariableTable and LocalVariableTypeTable
1889 Classfile_LVT_Element* cf_lvtt;
1890 LocalVariableTableElement lvtt_elem;
1891
1892 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
1893 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
1894 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
1895 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
1896 LocalVariableTableElement** entry = table->get(lvtt_elem);
1897 if (entry == NULL) {
1898 if (_need_verify) {
1899 classfile_parse_error("LVTT entry for '%s' in class file %s "
1900 "does not match any LVT entry",
1901 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
1902 CHECK);
1903 }
1904 } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
1905 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
1906 "entry for '%s' in class file %s",
1907 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
1908 CHECK);
1909 } else {
1910 // to add generic signatures into LocalVariableTable
1911 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
1912 }
1913 }
1914 }
1915 }
1916
1917
1918 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
1919 u1* runtime_visible_annotations,
1920 int runtime_visible_annotations_length,
1921 u1* runtime_invisible_annotations,
1922 int runtime_invisible_annotations_length,
1923 u1* runtime_visible_parameter_annotations,
1924 int runtime_visible_parameter_annotations_length,
1925 u1* runtime_invisible_parameter_annotations,
1926 int runtime_invisible_parameter_annotations_length,
1927 u1* runtime_visible_type_annotations,
1928 int runtime_visible_type_annotations_length,
1929 u1* runtime_invisible_type_annotations,
1930 int runtime_invisible_type_annotations_length,
1931 u1* annotation_default,
1932 int annotation_default_length,
1933 TRAPS) {
1934
1935 AnnotationArray* a;
1936
1937 if (runtime_visible_annotations_length +
1938 runtime_invisible_annotations_length > 0) {
1939 a = assemble_annotations(runtime_visible_annotations,
1940 runtime_visible_annotations_length,
1941 runtime_invisible_annotations,
1942 runtime_invisible_annotations_length,
1943 CHECK);
1944 cm->set_method_annotations(a);
1945 }
1946
1947 if (runtime_visible_parameter_annotations_length +
1948 runtime_invisible_parameter_annotations_length > 0) {
1949 a = assemble_annotations(runtime_visible_parameter_annotations,
1950 runtime_visible_parameter_annotations_length,
1951 runtime_invisible_parameter_annotations,
1952 runtime_invisible_parameter_annotations_length,
1953 CHECK);
1954 cm->set_parameter_annotations(a);
1955 }
1956
1957 if (annotation_default_length > 0) {
1958 a = assemble_annotations(annotation_default,
1959 annotation_default_length,
1960 NULL,
1961 0,
1962 CHECK);
1963 cm->set_default_annotations(a);
1964 }
1965
1966 if (runtime_visible_type_annotations_length +
1967 runtime_invisible_type_annotations_length > 0) {
1968 a = assemble_annotations(runtime_visible_type_annotations,
1969 runtime_visible_type_annotations_length,
1970 runtime_invisible_type_annotations,
1971 runtime_invisible_type_annotations_length,
1972 CHECK);
1973 cm->set_type_annotations(a);
1974 }
1975 }
1976
1977
1978 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1979 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
1980 // Method* to save footprint, so we only know the size of the resulting Method* when the
1981 // entire method attribute is parsed.
1982 //
1983 // The promoted_flags parameter is used to pass relevant access_flags
1984 // from the method back up to the containing klass. These flag values
1985 // are added to klass's access_flags.
1986
1987 methodHandle ClassFileParser::parse_method(bool is_interface,
1988 AccessFlags *promoted_flags,
1989 TRAPS) {
1990 ClassFileStream* cfs = stream();
1991 methodHandle nullHandle;
1992 ResourceMark rm(THREAD);
1993 // Parse fixed parts
1994 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1995
1996 int flags = cfs->get_u2_fast();
1997 u2 name_index = cfs->get_u2_fast();
1998 int cp_size = _cp->length();
1999 check_property(
2000 valid_symbol_at(name_index),
2001 "Illegal constant pool index %u for method name in class file %s",
2002 name_index, CHECK_(nullHandle));
2003 Symbol* name = _cp->symbol_at(name_index);
2004 verify_legal_method_name(name, CHECK_(nullHandle));
2005
2006 u2 signature_index = cfs->get_u2_fast();
2007 guarantee_property(
2008 valid_symbol_at(signature_index),
2009 "Illegal constant pool index %u for method signature in class file %s",
2010 signature_index, CHECK_(nullHandle));
2011 Symbol* signature = _cp->symbol_at(signature_index);
2012
2013 AccessFlags access_flags;
2014 if (name == vmSymbols::class_initializer_name()) {
2015 // We ignore the other access flags for a valid class initializer.
2016 // (JVM Spec 2nd ed., chapter 4.6)
2017 if (_major_version < 51) { // backward compatibility
2018 flags = JVM_ACC_STATIC;
2019 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2020 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2021 } else {
2022 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_(nullHandle));
2023 }
2024 } else {
2025 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
2026 }
2027
2028 if (name == vmSymbols::object_initializer_name() && is_interface) {
2029 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_(nullHandle));
2030 }
2031
2032 int args_size = -1; // only used when _need_verify is true
2033 if (_need_verify) {
2034 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2035 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
2036 if (args_size > MAX_ARGS_SIZE) {
2037 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
2038 }
2039 }
2040
2041 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2042
2043 // Default values for code and exceptions attribute elements
2044 u2 max_stack = 0;
2045 u2 max_locals = 0;
2046 u4 code_length = 0;
2047 u1* code_start = 0;
2048 u2 exception_table_length = 0;
2049 u2* exception_table_start = NULL;
2050 Array<int>* exception_handlers = Universe::the_empty_int_array();
2051 u2 checked_exceptions_length = 0;
2052 u2* checked_exceptions_start = NULL;
2053 CompressedLineNumberWriteStream* linenumber_table = NULL;
2054 int linenumber_table_length = 0;
2055 int total_lvt_length = 0;
2056 u2 lvt_cnt = 0;
2057 u2 lvtt_cnt = 0;
2058 bool lvt_allocated = false;
2059 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2060 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2061 u2* localvariable_table_length = NULL;
2062 u2** localvariable_table_start = NULL;
2063 u2* localvariable_type_table_length = NULL;
2064 u2** localvariable_type_table_start = NULL;
2065 int method_parameters_length = -1;
2066 u1* method_parameters_data = NULL;
2067 bool method_parameters_seen = false;
2068 bool parsed_code_attribute = false;
2069 bool parsed_checked_exceptions_attribute = false;
2070 bool parsed_stackmap_attribute = false;
2071 // stackmap attribute - JDK1.5
2072 u1* stackmap_data = NULL;
2073 int stackmap_data_length = 0;
2074 u2 generic_signature_index = 0;
2075 MethodAnnotationCollector parsed_annotations;
2076 u1* runtime_visible_annotations = NULL;
2077 int runtime_visible_annotations_length = 0;
2078 u1* runtime_invisible_annotations = NULL;
2079 int runtime_invisible_annotations_length = 0;
2080 u1* runtime_visible_parameter_annotations = NULL;
2081 int runtime_visible_parameter_annotations_length = 0;
2082 u1* runtime_invisible_parameter_annotations = NULL;
2083 int runtime_invisible_parameter_annotations_length = 0;
2084 u1* runtime_visible_type_annotations = NULL;
2085 int runtime_visible_type_annotations_length = 0;
2086 u1* runtime_invisible_type_annotations = NULL;
2087 int runtime_invisible_type_annotations_length = 0;
2088 bool runtime_invisible_annotations_exists = false;
2089 bool runtime_invisible_type_annotations_exists = false;
2090 bool runtime_invisible_parameter_annotations_exists = false;
2091 u1* annotation_default = NULL;
2092 int annotation_default_length = 0;
2093
2094 // Parse code and exceptions attribute
2095 u2 method_attributes_count = cfs->get_u2_fast();
2096 while (method_attributes_count--) {
2097 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
2098 u2 method_attribute_name_index = cfs->get_u2_fast();
2099 u4 method_attribute_length = cfs->get_u4_fast();
2100 check_property(
2101 valid_symbol_at(method_attribute_name_index),
2102 "Invalid method attribute name index %u in class file %s",
2103 method_attribute_name_index, CHECK_(nullHandle));
2104
2105 Symbol* method_attribute_name = _cp->symbol_at(method_attribute_name_index);
2106 if (method_attribute_name == vmSymbols::tag_code()) {
2107 // Parse Code attribute
2108 if (_need_verify) {
2109 guarantee_property(
2110 !access_flags.is_native() && !access_flags.is_abstract(),
2111 "Code attribute in native or abstract methods in class file %s",
2112 CHECK_(nullHandle));
2113 }
2114 if (parsed_code_attribute) {
2115 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
2116 }
2117 parsed_code_attribute = true;
2118
2119 // Stack size, locals size, and code size
2120 if (_major_version == 45 && _minor_version <= 2) {
2121 cfs->guarantee_more(4, CHECK_(nullHandle));
2122 max_stack = cfs->get_u1_fast();
2123 max_locals = cfs->get_u1_fast();
2124 code_length = cfs->get_u2_fast();
2125 } else {
2126 cfs->guarantee_more(8, CHECK_(nullHandle));
2127 max_stack = cfs->get_u2_fast();
2128 max_locals = cfs->get_u2_fast();
2129 code_length = cfs->get_u4_fast();
2130 }
2131 if (_need_verify) {
2132 guarantee_property(args_size <= max_locals,
2133 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
2134 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2135 "Invalid method Code length %u in class file %s",
2136 code_length, CHECK_(nullHandle));
2137 }
2138 // Code pointer
2139 code_start = cfs->get_u1_buffer();
2140 assert(code_start != NULL, "null code start");
2141 cfs->guarantee_more(code_length, CHECK_(nullHandle));
2142 cfs->skip_u1_fast(code_length);
2143
2144 // Exception handler table
2145 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
2146 exception_table_length = cfs->get_u2_fast();
2147 if (exception_table_length > 0) {
2148 exception_table_start =
2149 parse_exception_table(code_length, exception_table_length, CHECK_(nullHandle));
2150 }
2151
2152 // Parse additional attributes in code attribute
2153 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
2154 u2 code_attributes_count = cfs->get_u2_fast();
2155
2156 unsigned int calculated_attribute_length = 0;
2157
2158 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2159 calculated_attribute_length =
2160 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2161 } else {
2162 // max_stack, locals and length are smaller in pre-version 45.2 classes
2163 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2164 }
2165 calculated_attribute_length +=
2166 code_length +
2167 sizeof(exception_table_length) +
2168 sizeof(code_attributes_count) +
2169 exception_table_length *
2170 ( sizeof(u2) + // start_pc
2171 sizeof(u2) + // end_pc
2172 sizeof(u2) + // handler_pc
2173 sizeof(u2) ); // catch_type_index
2174
2175 while (code_attributes_count--) {
2176 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
2177 u2 code_attribute_name_index = cfs->get_u2_fast();
2178 u4 code_attribute_length = cfs->get_u4_fast();
2179 calculated_attribute_length += code_attribute_length +
2180 sizeof(code_attribute_name_index) +
2181 sizeof(code_attribute_length);
2182 check_property(valid_symbol_at(code_attribute_name_index),
2183 "Invalid code attribute name index %u in class file %s",
2184 code_attribute_name_index,
2185 CHECK_(nullHandle));
2186 if (LoadLineNumberTables &&
2187 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2188 // Parse and compress line number table
2189 parse_linenumber_table(code_attribute_length, code_length,
2190 &linenumber_table, CHECK_(nullHandle));
2191
2192 } else if (LoadLocalVariableTables &&
2193 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2194 // Parse local variable table
2195 if (!lvt_allocated) {
2196 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2197 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2198 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2199 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2200 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2201 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2202 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2203 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2204 lvt_allocated = true;
2205 }
2206 if (lvt_cnt == max_lvt_cnt) {
2207 max_lvt_cnt <<= 1;
2208 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2209 localvariable_table_start = REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2210 }
2211 localvariable_table_start[lvt_cnt] =
2212 parse_localvariable_table(code_length,
2213 max_locals,
2214 code_attribute_length,
2215 &localvariable_table_length[lvt_cnt],
2216 false, // is not LVTT
2217 CHECK_(nullHandle));
2218 total_lvt_length += localvariable_table_length[lvt_cnt];
2219 lvt_cnt++;
2220 } else if (LoadLocalVariableTypeTables &&
2221 _major_version >= JAVA_1_5_VERSION &&
2222 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2223 if (!lvt_allocated) {
2224 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2225 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2226 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2227 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2228 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2229 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2230 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2231 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2232 lvt_allocated = true;
2233 }
2234 // Parse local variable type table
2235 if (lvtt_cnt == max_lvtt_cnt) {
2236 max_lvtt_cnt <<= 1;
2237 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2238 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2239 }
2240 localvariable_type_table_start[lvtt_cnt] =
2241 parse_localvariable_table(code_length,
2242 max_locals,
2243 code_attribute_length,
2244 &localvariable_type_table_length[lvtt_cnt],
2245 true, // is LVTT
2246 CHECK_(nullHandle));
2247 lvtt_cnt++;
2248 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2249 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2250 // Stack map is only needed by the new verifier in JDK1.5.
2251 if (parsed_stackmap_attribute) {
2252 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
2253 }
2254 stackmap_data = parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
2255 stackmap_data_length = code_attribute_length;
2256 parsed_stackmap_attribute = true;
2257 } else {
2258 // Skip unknown attributes
2259 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
2260 }
2261 }
2262 // check method attribute length
2263 if (_need_verify) {
2264 guarantee_property(method_attribute_length == calculated_attribute_length,
2265 "Code segment has wrong length in class file %s", CHECK_(nullHandle));
2266 }
2267 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2268 // Parse Exceptions attribute
2269 if (parsed_checked_exceptions_attribute) {
2270 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
2271 }
2272 parsed_checked_exceptions_attribute = true;
2273 checked_exceptions_start =
2274 parse_checked_exceptions(&checked_exceptions_length,
2275 method_attribute_length,
2276 CHECK_(nullHandle));
2277 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2278 // reject multiple method parameters
2279 if (method_parameters_seen) {
2280 classfile_parse_error("Multiple MethodParameters attributes in class file %s", CHECK_(nullHandle));
2281 }
2282 method_parameters_seen = true;
2283 method_parameters_length = cfs->get_u1_fast();
2284 const u2 real_length = (method_parameters_length * 4u) + 1u;
2285 if (method_attribute_length != real_length) {
2286 classfile_parse_error(
2287 "Invalid MethodParameters method attribute length %u in class file",
2288 method_attribute_length, CHECK_(nullHandle));
2289 }
2290 method_parameters_data = cfs->get_u1_buffer();
2291 cfs->skip_u2_fast(method_parameters_length);
2292 cfs->skip_u2_fast(method_parameters_length);
2293 // ignore this attribute if it cannot be reflected
2294 if (!SystemDictionary::Parameter_klass_loaded())
2295 method_parameters_length = -1;
2296 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2297 if (method_attribute_length != 0) {
2298 classfile_parse_error(
2299 "Invalid Synthetic method attribute length %u in class file %s",
2300 method_attribute_length, CHECK_(nullHandle));
2301 }
2302 // Should we check that there hasn't already been a synthetic attribute?
2303 access_flags.set_is_synthetic();
2304 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2305 if (method_attribute_length != 0) {
2306 classfile_parse_error(
2307 "Invalid Deprecated method attribute length %u in class file %s",
2308 method_attribute_length, CHECK_(nullHandle));
2309 }
2310 } else if (_major_version >= JAVA_1_5_VERSION) {
2311 if (method_attribute_name == vmSymbols::tag_signature()) {
2312 if (method_attribute_length != 2) {
2313 classfile_parse_error(
2314 "Invalid Signature attribute length %u in class file %s",
2315 method_attribute_length, CHECK_(nullHandle));
2316 }
2317 generic_signature_index = parse_generic_signature_attribute(CHECK_(nullHandle));
2318 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2319 if (runtime_visible_annotations != NULL) {
2320 classfile_parse_error(
2321 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2322 }
2323 runtime_visible_annotations_length = method_attribute_length;
2324 runtime_visible_annotations = cfs->get_u1_buffer();
2325 assert(runtime_visible_annotations != NULL, "null visible annotations");
2326 parse_annotations(runtime_visible_annotations,
2327 runtime_visible_annotations_length, &parsed_annotations);
2328 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
2329 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2330 if (runtime_invisible_annotations_exists) {
2331 classfile_parse_error(
2332 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2333 }
2334 runtime_invisible_annotations_exists = true;
2335 if (PreserveAllAnnotations) {
2336 runtime_invisible_annotations_length = method_attribute_length;
2337 runtime_invisible_annotations = cfs->get_u1_buffer();
2338 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2339 }
2340 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2341 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2342 if (runtime_visible_parameter_annotations != NULL) {
2343 classfile_parse_error(
2344 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2345 }
2346 runtime_visible_parameter_annotations_length = method_attribute_length;
2347 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2348 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2349 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
2350 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2351 if (runtime_invisible_parameter_annotations_exists) {
2352 classfile_parse_error(
2353 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2354 }
2355 runtime_invisible_parameter_annotations_exists = true;
2356 if (PreserveAllAnnotations) {
2357 runtime_invisible_parameter_annotations_length = method_attribute_length;
2358 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2359 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
2360 }
2361 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2362 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2363 if (annotation_default != NULL) {
2364 classfile_parse_error(
2365 "Multiple AnnotationDefault attributes for method in class file %s",
2366 CHECK_(nullHandle));
2367 }
2368 annotation_default_length = method_attribute_length;
2369 annotation_default = cfs->get_u1_buffer();
2370 assert(annotation_default != NULL, "null annotation default");
2371 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
2372 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2373 if (runtime_visible_type_annotations != NULL) {
2374 classfile_parse_error(
2375 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2376 CHECK_(nullHandle));
2377 }
2378 runtime_visible_type_annotations_length = method_attribute_length;
2379 runtime_visible_type_annotations = cfs->get_u1_buffer();
2380 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2381 // No need for the VM to parse Type annotations
2382 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_(nullHandle));
2383 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2384 if (runtime_invisible_type_annotations_exists) {
2385 classfile_parse_error(
2386 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2387 CHECK_(nullHandle));
2388 } else {
2389 runtime_invisible_type_annotations_exists = true;
2390 }
2391 if (PreserveAllAnnotations) {
2392 runtime_invisible_type_annotations_length = method_attribute_length;
2393 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2394 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2395 }
2396 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2397 } else {
2398 // Skip unknown attributes
2399 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2400 }
2401 } else {
2402 // Skip unknown attributes
2403 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2404 }
2405 }
2406
2407 if (linenumber_table != NULL) {
2408 linenumber_table->write_terminator();
2409 linenumber_table_length = linenumber_table->position();
2410 }
2411
2412 // Make sure there's at least one Code attribute in non-native/non-abstract method
2413 if (_need_verify) {
2414 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
2415 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
2416 }
2417
2418 // All sizing information for a Method* is finally available, now create it
2419 InlineTableSizes sizes(
2420 total_lvt_length,
2421 linenumber_table_length,
2422 exception_table_length,
2423 checked_exceptions_length,
2424 method_parameters_length,
2425 generic_signature_index,
2426 runtime_visible_annotations_length +
2427 runtime_invisible_annotations_length,
2428 runtime_visible_parameter_annotations_length +
2429 runtime_invisible_parameter_annotations_length,
2430 runtime_visible_type_annotations_length +
2431 runtime_invisible_type_annotations_length,
2432 annotation_default_length,
2433 0);
2434
2435 Method* m = Method::allocate(
2436 _loader_data, code_length, access_flags, &sizes,
2437 ConstMethod::NORMAL, CHECK_(nullHandle));
2438
2439 ClassLoadingService::add_class_method_size(m->size()*HeapWordSize);
2440
2441 // Fill in information from fixed part (access_flags already set)
2442 m->set_constants(_cp);
2443 m->set_name_index(name_index);
2444 m->set_signature_index(signature_index);
2445 #ifdef CC_INTERP
2446 // hmm is there a gc issue here??
2447 ResultTypeFinder rtf(_cp->symbol_at(signature_index));
2448 m->set_result_index(rtf.type());
2449 #endif
2450
2451 if (args_size >= 0) {
2452 m->set_size_of_parameters(args_size);
2453 } else {
2454 m->compute_size_of_parameters(THREAD);
2455 }
2456 #ifdef ASSERT
2457 if (args_size >= 0) {
2458 m->compute_size_of_parameters(THREAD);
2459 assert(args_size == m->size_of_parameters(), "");
2460 }
2461 #endif
2462
2463 // Fill in code attribute information
2464 m->set_max_stack(max_stack);
2465 m->set_max_locals(max_locals);
2466 if (stackmap_data != NULL) {
2467 m->constMethod()->copy_stackmap_data(_loader_data, stackmap_data,
2468 stackmap_data_length, CHECK_NULL);
2469 }
2470
2471 // Copy byte codes
2472 m->set_code(code_start);
2473
2474 // Copy line number table
2475 if (linenumber_table != NULL) {
2476 memcpy(m->compressed_linenumber_table(),
2477 linenumber_table->buffer(), linenumber_table_length);
2478 }
2479
2480 // Copy exception table
2481 if (exception_table_length > 0) {
2482 int size =
2483 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2484 copy_u2_with_conversion((u2*) m->exception_table_start(),
2485 exception_table_start, size);
2486 }
2487
2488 // Copy method parameters
2489 if (method_parameters_length > 0) {
2490 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2491 for (int i = 0; i < method_parameters_length; i++) {
2492 elem[i].name_cp_index = Bytes::get_Java_u2(method_parameters_data);
2493 method_parameters_data += 2;
2494 elem[i].flags = Bytes::get_Java_u2(method_parameters_data);
2495 method_parameters_data += 2;
2496 }
2497 }
2498
2499 // Copy checked exceptions
2500 if (checked_exceptions_length > 0) {
2501 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2502 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
2503 }
2504
2505 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2506 if (total_lvt_length > 0) {
2507 promoted_flags->set_has_localvariable_table();
2508 copy_localvariable_table(m->constMethod(), lvt_cnt,
2509 localvariable_table_length,
2510 localvariable_table_start,
2511 lvtt_cnt,
2512 localvariable_type_table_length,
2513 localvariable_type_table_start, CHECK_NULL);
2514 }
2515
2516 if (parsed_annotations.has_any_annotations())
2517 parsed_annotations.apply_to(m);
2518
2519 // Copy annotations
2520 copy_method_annotations(m->constMethod(),
2521 runtime_visible_annotations,
2522 runtime_visible_annotations_length,
2523 runtime_invisible_annotations,
2524 runtime_invisible_annotations_length,
2525 runtime_visible_parameter_annotations,
2526 runtime_visible_parameter_annotations_length,
2527 runtime_invisible_parameter_annotations,
2528 runtime_invisible_parameter_annotations_length,
2529 runtime_visible_type_annotations,
2530 runtime_visible_type_annotations_length,
2531 runtime_invisible_type_annotations,
2532 runtime_invisible_type_annotations_length,
2533 annotation_default,
2534 annotation_default_length,
2535 CHECK_NULL);
2536
2537 if (name == vmSymbols::finalize_method_name() &&
2538 signature == vmSymbols::void_method_signature()) {
2539 if (m->is_empty_method()) {
2540 _has_empty_finalizer = true;
2541 } else {
2542 _has_finalizer = true;
2543 }
2544 }
2545 if (name == vmSymbols::object_initializer_name() &&
2546 signature == vmSymbols::void_method_signature() &&
2547 m->is_vanilla_constructor()) {
2548 _has_vanilla_constructor = true;
2549 }
2550
2551 NOT_PRODUCT(m->verify());
2552 return m;
2553 }
2554
2555
2556 // The promoted_flags parameter is used to pass relevant access_flags
2557 // from the methods back up to the containing klass. These flag values
2558 // are added to klass's access_flags.
2559
2560 Array<Method*>* ClassFileParser::parse_methods(bool is_interface,
2561 AccessFlags* promoted_flags,
2562 bool* has_final_method,
2563 bool* declares_default_methods,
2564 TRAPS) {
2565 ClassFileStream* cfs = stream();
2566 cfs->guarantee_more(2, CHECK_NULL); // length
2567 u2 length = cfs->get_u2_fast();
2568 if (length == 0) {
2569 _methods = Universe::the_empty_method_array();
2570 } else {
2571 _methods = MetadataFactory::new_array<Method*>(_loader_data, length, NULL, CHECK_NULL);
2572
2573 HandleMark hm(THREAD);
2574 for (int index = 0; index < length; index++) {
2575 methodHandle method = parse_method(is_interface,
2576 promoted_flags,
2577 CHECK_NULL);
2578
2579 if (method->is_final()) {
2580 *has_final_method = true;
2581 }
2582 // declares_default_methods: declares concrete instance methods, any access flags
2583 // used for interface initialization, and default method inheritance analysis
2584 if (is_interface && !(*declares_default_methods)
2585 && !method->is_abstract() && !method->is_static()) {
2586 *declares_default_methods = true;
2587 }
2588 _methods->at_put(index, method());
2589 }
2590
2591 if (_need_verify && length > 1) {
2592 // Check duplicated methods
2593 ResourceMark rm(THREAD);
2594 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2595 THREAD, NameSigHash*, HASH_ROW_SIZE);
2596 initialize_hashtable(names_and_sigs);
2597 bool dup = false;
2598 {
2599 debug_only(No_Safepoint_Verifier nsv;)
2600 for (int i = 0; i < length; i++) {
2601 Method* m = _methods->at(i);
2602 // If no duplicates, add name/signature in hashtable names_and_sigs.
2603 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2604 dup = true;
2605 break;
2606 }
2607 }
2608 }
2609 if (dup) {
2610 classfile_parse_error("Duplicate method name&signature in class file %s",
2611 CHECK_NULL);
2612 }
2613 }
2614 }
2615 return _methods;
2616 }
2617
2618
2619 intArray* ClassFileParser::sort_methods(Array<Method*>* methods) {
2620 int length = methods->length();
2621 // If JVMTI original method ordering or sharing is enabled we have to
2622 // remember the original class file ordering.
2623 // We temporarily use the vtable_index field in the Method* to store the
2624 // class file index, so we can read in after calling qsort.
2625 // Put the method ordering in the shared archive.
2626 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2627 for (int index = 0; index < length; index++) {
2628 Method* m = methods->at(index);
2629 assert(!m->valid_vtable_index(), "vtable index should not be set");
2630 m->set_vtable_index(index);
2631 }
2632 }
2633 // Sort method array by ascending method name (for faster lookups & vtable construction)
2634 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2635 Method::sort_methods(methods);
2636
2637 intArray* method_ordering = NULL;
2638 // If JVMTI original method ordering or sharing is enabled construct int
2639 // array remembering the original ordering
2640 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2641 method_ordering = new intArray(length);
2642 for (int index = 0; index < length; index++) {
2643 Method* m = methods->at(index);
2644 int old_index = m->vtable_index();
2645 assert(old_index >= 0 && old_index < length, "invalid method index");
2646 method_ordering->at_put(index, old_index);
2647 m->set_vtable_index(Method::invalid_vtable_index);
2648 }
2649 }
2650 return method_ordering;
2651 }
2652
2653 // Parse generic_signature attribute for methods and fields
2654 u2 ClassFileParser::parse_generic_signature_attribute(TRAPS) {
2655 ClassFileStream* cfs = stream();
2656 cfs->guarantee_more(2, CHECK_0); // generic_signature_index
2657 u2 generic_signature_index = cfs->get_u2_fast();
2658 check_property(
2659 valid_symbol_at(generic_signature_index),
2660 "Invalid Signature attribute at constant pool index %u in class file %s",
2661 generic_signature_index, CHECK_0);
2662 return generic_signature_index;
2663 }
2664
2665 void ClassFileParser::parse_classfile_sourcefile_attribute(TRAPS) {
2666 ClassFileStream* cfs = stream();
2667 cfs->guarantee_more(2, CHECK); // sourcefile_index
2668 u2 sourcefile_index = cfs->get_u2_fast();
2669 check_property(
2670 valid_symbol_at(sourcefile_index),
2671 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2672 sourcefile_index, CHECK);
2673 set_class_sourcefile_index(sourcefile_index);
2674 }
2675
2676
2677
2678 void ClassFileParser::parse_classfile_source_debug_extension_attribute(int length, TRAPS) {
2679 ClassFileStream* cfs = stream();
2680 u1* sde_buffer = cfs->get_u1_buffer();
2681 assert(sde_buffer != NULL, "null sde buffer");
2682
2683 // Don't bother storing it if there is no way to retrieve it
2684 if (JvmtiExport::can_get_source_debug_extension()) {
2685 assert((length+1) > length, "Overflow checking");
2686 u1* sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2687 for (int i = 0; i < length; i++) {
2688 sde[i] = sde_buffer[i];
2689 }
2690 sde[length] = '\0';
2691 set_class_sde_buffer((char*)sde, length);
2692 }
2693 // Got utf8 string, set stream position forward
2694 cfs->skip_u1(length, CHECK);
2695 }
2696
2697
2698 // Inner classes can be static, private or protected (classic VM does this)
2699 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2700
2701 // Return number of classes in the inner classes attribute table
2702 u2 ClassFileParser::parse_classfile_inner_classes_attribute(u1* inner_classes_attribute_start,
2703 bool parsed_enclosingmethod_attribute,
2704 u2 enclosing_method_class_index,
2705 u2 enclosing_method_method_index,
2706 TRAPS) {
2707 ClassFileStream* cfs = stream();
2708 u1* current_mark = cfs->current();
2709 u2 length = 0;
2710 if (inner_classes_attribute_start != NULL) {
2711 cfs->set_current(inner_classes_attribute_start);
2712 cfs->guarantee_more(2, CHECK_0); // length
2713 length = cfs->get_u2_fast();
2714 }
2715
2716 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2717 // method data:
2718 // [inner_class_info_index,
2719 // outer_class_info_index,
2720 // inner_name_index,
2721 // inner_class_access_flags,
2722 // ...
2723 // enclosing_method_class_index,
2724 // enclosing_method_method_index]
2725 int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2726 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
2727 _inner_classes = inner_classes;
2728
2729 int index = 0;
2730 int cp_size = _cp->length();
2731 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2732 for (int n = 0; n < length; n++) {
2733 // Inner class index
2734 u2 inner_class_info_index = cfs->get_u2_fast();
2735 check_property(
2736 valid_klass_reference_at(inner_class_info_index),
2737 "inner_class_info_index %u has bad constant type in class file %s",
2738 inner_class_info_index, CHECK_0);
2739 // Outer class index
2740 u2 outer_class_info_index = cfs->get_u2_fast();
2741 check_property(
2742 outer_class_info_index == 0 ||
2743 valid_klass_reference_at(outer_class_info_index),
2744 "outer_class_info_index %u has bad constant type in class file %s",
2745 outer_class_info_index, CHECK_0);
2746 // Inner class name
2747 u2 inner_name_index = cfs->get_u2_fast();
2748 check_property(
2749 inner_name_index == 0 || valid_symbol_at(inner_name_index),
2750 "inner_name_index %u has bad constant type in class file %s",
2751 inner_name_index, CHECK_0);
2752 if (_need_verify) {
2753 guarantee_property(inner_class_info_index != outer_class_info_index,
2754 "Class is both outer and inner class in class file %s", CHECK_0);
2755 }
2756 // Access flags
2757 AccessFlags inner_access_flags;
2758 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2759 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2760 // Set abstract bit for old class files for backward compatibility
2761 flags |= JVM_ACC_ABSTRACT;
2762 }
2763 verify_legal_class_modifiers(flags, CHECK_0);
2764 inner_access_flags.set_flags(flags);
2765
2766 inner_classes->at_put(index++, inner_class_info_index);
2767 inner_classes->at_put(index++, outer_class_info_index);
2768 inner_classes->at_put(index++, inner_name_index);
2769 inner_classes->at_put(index++, inner_access_flags.as_short());
2770 }
2771
2772 // 4347400: make sure there's no duplicate entry in the classes array
2773 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2774 for(int i = 0; i < length * 4; i += 4) {
2775 for(int j = i + 4; j < length * 4; j += 4) {
2776 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
2777 inner_classes->at(i+1) != inner_classes->at(j+1) ||
2778 inner_classes->at(i+2) != inner_classes->at(j+2) ||
2779 inner_classes->at(i+3) != inner_classes->at(j+3)),
2780 "Duplicate entry in InnerClasses in class file %s",
2781 CHECK_0);
2782 }
2783 }
2784 }
2785
2786 // Set EnclosingMethod class and method indexes.
2787 if (parsed_enclosingmethod_attribute) {
2788 inner_classes->at_put(index++, enclosing_method_class_index);
2789 inner_classes->at_put(index++, enclosing_method_method_index);
2790 }
2791 assert(index == size, "wrong size");
2792
2793 // Restore buffer's current position.
2794 cfs->set_current(current_mark);
2795
2796 return length;
2797 }
2798
2799 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
2800 set_class_synthetic_flag(true);
2801 }
2802
2803 void ClassFileParser::parse_classfile_signature_attribute(TRAPS) {
2804 ClassFileStream* cfs = stream();
2805 u2 signature_index = cfs->get_u2(CHECK);
2806 check_property(
2807 valid_symbol_at(signature_index),
2808 "Invalid constant pool index %u in Signature attribute in class file %s",
2809 signature_index, CHECK);
2810 set_class_generic_signature_index(signature_index);
2811 }
2812
2813 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(u4 attribute_byte_length, TRAPS) {
2814 ClassFileStream* cfs = stream();
2815 u1* current_start = cfs->current();
2816
2817 guarantee_property(attribute_byte_length >= sizeof(u2),
2818 "Invalid BootstrapMethods attribute length %u in class file %s",
2819 attribute_byte_length,
2820 CHECK);
2821
2822 cfs->guarantee_more(attribute_byte_length, CHECK);
2823
2824 int attribute_array_length = cfs->get_u2_fast();
2825
2826 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2827 "Short length on BootstrapMethods in class file %s",
2828 CHECK);
2829
2830
2831 // The attribute contains a counted array of counted tuples of shorts,
2832 // represending bootstrap specifiers:
2833 // length*{bootstrap_method_index, argument_count*{argument_index}}
2834 int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2835 // operand_count = number of shorts in attr, except for leading length
2836
2837 // The attribute is copied into a short[] array.
2838 // The array begins with a series of short[2] pairs, one for each tuple.
2839 int index_size = (attribute_array_length * 2);
2840
2841 Array<u2>* operands = MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
2842
2843 // Eagerly assign operands so they will be deallocated with the constant
2844 // pool if there is an error.
2845 _cp->set_operands(operands);
2846
2847 int operand_fill_index = index_size;
2848 int cp_size = _cp->length();
2849
2850 for (int n = 0; n < attribute_array_length; n++) {
2851 // Store a 32-bit offset into the header of the operand array.
2852 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
2853
2854 // Read a bootstrap specifier.
2855 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
2856 u2 bootstrap_method_index = cfs->get_u2_fast();
2857 u2 argument_count = cfs->get_u2_fast();
2858 check_property(
2859 valid_cp_range(bootstrap_method_index, cp_size) &&
2860 _cp->tag_at(bootstrap_method_index).is_method_handle(),
2861 "bootstrap_method_index %u has bad constant type in class file %s",
2862 bootstrap_method_index,
2863 CHECK);
2864
2865 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
2866 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
2867 CHECK);
2868
2869 operands->at_put(operand_fill_index++, bootstrap_method_index);
2870 operands->at_put(operand_fill_index++, argument_count);
2871
2872 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
2873 for (int j = 0; j < argument_count; j++) {
2874 u2 argument_index = cfs->get_u2_fast();
2875 check_property(
2876 valid_cp_range(argument_index, cp_size) &&
2877 _cp->tag_at(argument_index).is_loadable_constant(),
2878 "argument_index %u has bad constant type in class file %s",
2879 argument_index,
2880 CHECK);
2881 operands->at_put(operand_fill_index++, argument_index);
2882 }
2883 }
2884
2885 u1* current_end = cfs->current();
2886 guarantee_property(current_end == current_start + attribute_byte_length,
2887 "Bad length on BootstrapMethods in class file %s",
2888 CHECK);
2889 }
2890
2891 void ClassFileParser::parse_classfile_attributes(ClassFileParser::ClassAnnotationCollector* parsed_annotations,
2892 TRAPS) {
2893 ClassFileStream* cfs = stream();
2894 // Set inner classes attribute to default sentinel
2895 _inner_classes = Universe::the_empty_short_array();
2896 cfs->guarantee_more(2, CHECK); // attributes_count
2897 u2 attributes_count = cfs->get_u2_fast();
2898 bool parsed_sourcefile_attribute = false;
2899 bool parsed_innerclasses_attribute = false;
2900 bool parsed_enclosingmethod_attribute = false;
2901 bool parsed_bootstrap_methods_attribute = false;
2902 u1* runtime_visible_annotations = NULL;
2903 int runtime_visible_annotations_length = 0;
2904 u1* runtime_invisible_annotations = NULL;
2905 int runtime_invisible_annotations_length = 0;
2906 u1* runtime_visible_type_annotations = NULL;
2907 int runtime_visible_type_annotations_length = 0;
2908 u1* runtime_invisible_type_annotations = NULL;
2909 int runtime_invisible_type_annotations_length = 0;
2910 bool runtime_invisible_type_annotations_exists = false;
2911 bool runtime_invisible_annotations_exists = false;
2912 bool parsed_source_debug_ext_annotations_exist = false;
2913 u1* inner_classes_attribute_start = NULL;
2914 u4 inner_classes_attribute_length = 0;
2915 u2 enclosing_method_class_index = 0;
2916 u2 enclosing_method_method_index = 0;
2917 // Iterate over attributes
2918 while (attributes_count--) {
2919 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
2920 u2 attribute_name_index = cfs->get_u2_fast();
2921 u4 attribute_length = cfs->get_u4_fast();
2922 check_property(
2923 valid_symbol_at(attribute_name_index),
2924 "Attribute name has bad constant pool index %u in class file %s",
2925 attribute_name_index, CHECK);
2926 Symbol* tag = _cp->symbol_at(attribute_name_index);
2927 if (tag == vmSymbols::tag_source_file()) {
2928 // Check for SourceFile tag
2929 if (_need_verify) {
2930 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2931 }
2932 if (parsed_sourcefile_attribute) {
2933 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2934 } else {
2935 parsed_sourcefile_attribute = true;
2936 }
2937 parse_classfile_sourcefile_attribute(CHECK);
2938 } else if (tag == vmSymbols::tag_source_debug_extension()) {
2939 // Check for SourceDebugExtension tag
2940 if (parsed_source_debug_ext_annotations_exist) {
2941 classfile_parse_error(
2942 "Multiple SourceDebugExtension attributes in class file %s", CHECK);
2943 }
2944 parsed_source_debug_ext_annotations_exist = true;
2945 parse_classfile_source_debug_extension_attribute((int)attribute_length, CHECK);
2946 } else if (tag == vmSymbols::tag_inner_classes()) {
2947 // Check for InnerClasses tag
2948 if (parsed_innerclasses_attribute) {
2949 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2950 } else {
2951 parsed_innerclasses_attribute = true;
2952 }
2953 inner_classes_attribute_start = cfs->get_u1_buffer();
2954 inner_classes_attribute_length = attribute_length;
2955 cfs->skip_u1(inner_classes_attribute_length, CHECK);
2956 } else if (tag == vmSymbols::tag_synthetic()) {
2957 // Check for Synthetic tag
2958 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2959 if (attribute_length != 0) {
2960 classfile_parse_error(
2961 "Invalid Synthetic classfile attribute length %u in class file %s",
2962 attribute_length, CHECK);
2963 }
2964 parse_classfile_synthetic_attribute(CHECK);
2965 } else if (tag == vmSymbols::tag_deprecated()) {
2966 // Check for Deprecatd tag - 4276120
2967 if (attribute_length != 0) {
2968 classfile_parse_error(
2969 "Invalid Deprecated classfile attribute length %u in class file %s",
2970 attribute_length, CHECK);
2971 }
2972 } else if (_major_version >= JAVA_1_5_VERSION) {
2973 if (tag == vmSymbols::tag_signature()) {
2974 if (attribute_length != 2) {
2975 classfile_parse_error(
2976 "Wrong Signature attribute length %u in class file %s",
2977 attribute_length, CHECK);
2978 }
2979 parse_classfile_signature_attribute(CHECK);
2980 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2981 if (runtime_visible_annotations != NULL) {
2982 classfile_parse_error(
2983 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
2984 }
2985 runtime_visible_annotations_length = attribute_length;
2986 runtime_visible_annotations = cfs->get_u1_buffer();
2987 assert(runtime_visible_annotations != NULL, "null visible annotations");
2988 parse_annotations(runtime_visible_annotations,
2989 runtime_visible_annotations_length,
2990 parsed_annotations);
2991 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2992 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
2993 if (runtime_invisible_annotations_exists) {
2994 classfile_parse_error(
2995 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
2996 }
2997 runtime_invisible_annotations_exists = true;
2998 if (PreserveAllAnnotations) {
2999 runtime_invisible_annotations_length = attribute_length;
3000 runtime_invisible_annotations = cfs->get_u1_buffer();
3001 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3002 }
3003 cfs->skip_u1(attribute_length, CHECK);
3004 } else if (tag == vmSymbols::tag_enclosing_method()) {
3005 if (parsed_enclosingmethod_attribute) {
3006 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3007 } else {
3008 parsed_enclosingmethod_attribute = true;
3009 }
3010 guarantee_property(attribute_length == 4,
3011 "Wrong EnclosingMethod attribute length %u in class file %s",
3012 attribute_length, CHECK);
3013 cfs->guarantee_more(4, CHECK); // class_index, method_index
3014 enclosing_method_class_index = cfs->get_u2_fast();
3015 enclosing_method_method_index = cfs->get_u2_fast();
3016 if (enclosing_method_class_index == 0) {
3017 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3018 }
3019 // Validate the constant pool indices and types
3020 check_property(valid_klass_reference_at(enclosing_method_class_index),
3021 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3022 if (enclosing_method_method_index != 0 &&
3023 (!_cp->is_within_bounds(enclosing_method_method_index) ||
3024 !_cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3025 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3026 }
3027 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3028 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3029 if (parsed_bootstrap_methods_attribute)
3030 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3031 parsed_bootstrap_methods_attribute = true;
3032 parse_classfile_bootstrap_methods_attribute(attribute_length, CHECK);
3033 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3034 if (runtime_visible_type_annotations != NULL) {
3035 classfile_parse_error(
3036 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3037 }
3038 runtime_visible_type_annotations_length = attribute_length;
3039 runtime_visible_type_annotations = cfs->get_u1_buffer();
3040 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3041 // No need for the VM to parse Type annotations
3042 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3043 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3044 if (runtime_invisible_type_annotations_exists) {
3045 classfile_parse_error(
3046 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3047 } else {
3048 runtime_invisible_type_annotations_exists = true;
3049 }
3050 if (PreserveAllAnnotations) {
3051 runtime_invisible_type_annotations_length = attribute_length;
3052 runtime_invisible_type_annotations = cfs->get_u1_buffer();
3053 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3054 }
3055 cfs->skip_u1(attribute_length, CHECK);
3056 } else {
3057 // Unknown attribute
3058 cfs->skip_u1(attribute_length, CHECK);
3059 }
3060 } else {
3061 // Unknown attribute
3062 cfs->skip_u1(attribute_length, CHECK);
3063 }
3064 }
3065 _annotations = assemble_annotations(runtime_visible_annotations,
3066 runtime_visible_annotations_length,
3067 runtime_invisible_annotations,
3068 runtime_invisible_annotations_length,
3069 CHECK);
3070 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3071 runtime_visible_type_annotations_length,
3072 runtime_invisible_type_annotations,
3073 runtime_invisible_type_annotations_length,
3074 CHECK);
3075
3076 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3077 u2 num_of_classes = parse_classfile_inner_classes_attribute(
3078 inner_classes_attribute_start,
3079 parsed_innerclasses_attribute,
3080 enclosing_method_class_index,
3081 enclosing_method_method_index,
3082 CHECK);
3083 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3084 guarantee_property(
3085 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3086 "Wrong InnerClasses attribute length in class file %s", CHECK);
3087 }
3088 }
3089
3090 if (_max_bootstrap_specifier_index >= 0) {
3091 guarantee_property(parsed_bootstrap_methods_attribute,
3092 "Missing BootstrapMethods attribute in class file %s", CHECK);
3093 }
3094 }
3095
3096 void ClassFileParser::apply_parsed_class_attributes(instanceKlassHandle k) {
3097 if (_synthetic_flag)
3098 k->set_is_synthetic();
3099 if (_sourcefile_index != 0) {
3100 k->set_source_file_name_index(_sourcefile_index);
3101 }
3102 if (_generic_signature_index != 0) {
3103 k->set_generic_signature_index(_generic_signature_index);
3104 }
3105 if (_sde_buffer != NULL) {
3106 k->set_source_debug_extension(_sde_buffer, _sde_length);
3107 }
3108 }
3109
3110 // Create the Annotations object that will
3111 // hold the annotations array for the Klass.
3112 void ClassFileParser::create_combined_annotations(TRAPS) {
3113 if (_annotations == NULL &&
3114 _type_annotations == NULL &&
3115 _fields_annotations == NULL &&
3116 _fields_type_annotations == NULL) {
3117 // Don't create the Annotations object unnecessarily.
3118 return;
3119 }
3120
3121 Annotations* annotations = Annotations::allocate(_loader_data, CHECK);
3122 annotations->set_class_annotations(_annotations);
3123 annotations->set_class_type_annotations(_type_annotations);
3124 annotations->set_fields_annotations(_fields_annotations);
3125 annotations->set_fields_type_annotations(_fields_type_annotations);
3126
3127 // This is the Annotations object that will be
3128 // assigned to InstanceKlass being constructed.
3129 _combined_annotations = annotations;
3130
3131 // The annotations arrays below has been transfered the
3132 // _combined_annotations so these fields can now be cleared.
3133 _annotations = NULL;
3134 _type_annotations = NULL;
3135 _fields_annotations = NULL;
3136 _fields_type_annotations = NULL;
3137 }
3138
3139 // Transfer ownership of metadata allocated to the InstanceKlass.
3140 void ClassFileParser::apply_parsed_class_metadata(
3141 instanceKlassHandle this_klass,
3142 int java_fields_count, TRAPS) {
3143 _cp->set_pool_holder(this_klass());
3144 this_klass->set_constants(_cp);
3145 this_klass->set_fields(_fields, java_fields_count);
3146 this_klass->set_methods(_methods);
3147 this_klass->set_inner_classes(_inner_classes);
3148 this_klass->set_local_interfaces(_local_interfaces);
3149 this_klass->set_transitive_interfaces(_transitive_interfaces);
3150 this_klass->set_annotations(_combined_annotations);
3151
3152 // Clear out these fields so they don't get deallocated by the destructor
3153 clear_class_metadata();
3154 }
3155
3156 AnnotationArray* ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
3157 int runtime_visible_annotations_length,
3158 u1* runtime_invisible_annotations,
3159 int runtime_invisible_annotations_length, TRAPS) {
3160 AnnotationArray* annotations = NULL;
3161 if (runtime_visible_annotations != NULL ||
3162 runtime_invisible_annotations != NULL) {
3163 annotations = MetadataFactory::new_array<u1>(_loader_data,
3164 runtime_visible_annotations_length +
3165 runtime_invisible_annotations_length,
3166 CHECK_(annotations));
3167 if (runtime_visible_annotations != NULL) {
3168 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3169 annotations->at_put(i, runtime_visible_annotations[i]);
3170 }
3171 }
3172 if (runtime_invisible_annotations != NULL) {
3173 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3174 int append = runtime_visible_annotations_length+i;
3175 annotations->at_put(append, runtime_invisible_annotations[i]);
3176 }
3177 }
3178 }
3179 return annotations;
3180 }
3181
3182 instanceKlassHandle ClassFileParser::parse_super_class(int super_class_index,
3183 TRAPS) {
3184 instanceKlassHandle super_klass;
3185 if (super_class_index == 0) {
3186 check_property(_class_name == vmSymbols::java_lang_Object(),
3187 "Invalid superclass index %u in class file %s",
3188 super_class_index,
3189 CHECK_NULL);
3190 } else {
3191 check_property(valid_klass_reference_at(super_class_index),
3192 "Invalid superclass index %u in class file %s",
3193 super_class_index,
3194 CHECK_NULL);
3195 // The class name should be legal because it is checked when parsing constant pool.
3196 // However, make sure it is not an array type.
3197 bool is_array = false;
3198 if (_cp->tag_at(super_class_index).is_klass()) {
3199 super_klass = instanceKlassHandle(THREAD, _cp->resolved_klass_at(super_class_index));
3200 if (_need_verify) {
3201 is_array = super_klass->is_array_klass();
3202 }
3203 } else if (_need_verify) {
3204 is_array = (_cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3205 }
3206 if (_need_verify) {
3207 guarantee_property(!is_array,
3208 "Bad superclass name in class file %s", CHECK_NULL);
3209 }
3210 }
3211 return super_klass;
3212 }
3213
3214
3215 // Values needed for oopmap and InstanceKlass creation
3216 class FieldLayoutInfo : public StackObj {
3217 public:
3218 int* nonstatic_oop_offsets;
3219 unsigned int* nonstatic_oop_counts;
3220 unsigned int nonstatic_oop_map_count;
3221 unsigned int total_oop_map_count;
3222 int instance_size;
3223 int nonstatic_field_size;
3224 int static_field_size;
3225 bool has_nonstatic_fields;
3226 };
3227
3228 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3229 void ClassFileParser::layout_fields(Handle class_loader,
3230 FieldAllocationCount* fac,
3231 ClassAnnotationCollector* parsed_annotations,
3232 FieldLayoutInfo* info,
3233 TRAPS) {
3234
3235 // Field size and offset computation
3236 int nonstatic_field_size = _super_klass() == NULL ? 0 : _super_klass()->nonstatic_field_size();
3237 int next_static_oop_offset = 0;
3238 int next_static_double_offset = 0;
3239 int next_static_word_offset = 0;
3240 int next_static_short_offset = 0;
3241 int next_static_byte_offset = 0;
3242 int next_nonstatic_oop_offset = 0;
3243 int next_nonstatic_double_offset = 0;
3244 int next_nonstatic_word_offset = 0;
3245 int next_nonstatic_short_offset = 0;
3246 int next_nonstatic_byte_offset = 0;
3247 int first_nonstatic_oop_offset = 0;
3248 int next_nonstatic_field_offset = 0;
3249 int next_nonstatic_padded_offset = 0;
3250
3251 // Count the contended fields by type.
3252 //
3253 // We ignore static fields, because @Contended is not supported for them.
3254 // The layout code below will also ignore the static fields.
3255 int nonstatic_contended_count = 0;
3256 FieldAllocationCount fac_contended;
3257 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3258 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3259 if (fs.is_contended()) {
3260 fac_contended.count[atype]++;
3261 if (!fs.access_flags().is_static()) {
3262 nonstatic_contended_count++;
3263 }
3264 }
3265 }
3266
3267
3268 // Calculate the starting byte offsets
3269 next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3270 next_static_double_offset = next_static_oop_offset +
3271 ((fac->count[STATIC_OOP]) * heapOopSize);
3272 if ( fac->count[STATIC_DOUBLE] &&
3273 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3274 Universe::field_type_should_be_aligned(T_LONG)) ) {
3275 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3276 }
3277
3278 next_static_word_offset = next_static_double_offset +
3279 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3280 next_static_short_offset = next_static_word_offset +
3281 ((fac->count[STATIC_WORD]) * BytesPerInt);
3282 next_static_byte_offset = next_static_short_offset +
3283 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3284
3285 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3286 nonstatic_field_size * heapOopSize;
3287
3288 next_nonstatic_field_offset = nonstatic_fields_start;
3289
3290 bool is_contended_class = parsed_annotations->is_contended();
3291
3292 // Class is contended, pad before all the fields
3293 if (is_contended_class) {
3294 next_nonstatic_field_offset += ContendedPaddingWidth;
3295 }
3296
3297 // Compute the non-contended fields count.
3298 // The packing code below relies on these counts to determine if some field
3299 // can be squeezed into the alignment gap. Contended fields are obviously
3300 // exempt from that.
3301 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3302 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3303 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3304 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3305 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3306
3307 // Total non-static fields count, including every contended field
3308 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3309 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3310 fac->count[NONSTATIC_OOP];
3311
3312 bool super_has_nonstatic_fields =
3313 (_super_klass() != NULL && _super_klass->has_nonstatic_fields());
3314 bool has_nonstatic_fields = super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3315
3316
3317 // Prepare list of oops for oop map generation.
3318 //
3319 // "offset" and "count" lists are describing the set of contiguous oop
3320 // regions. offset[i] is the start of the i-th region, which then has
3321 // count[i] oops following. Before we know how many regions are required,
3322 // we pessimistically allocate the maps to fit all the oops into the
3323 // distinct regions.
3324 //
3325 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3326 // to figure out if we still need to do this.
3327 int* nonstatic_oop_offsets;
3328 unsigned int* nonstatic_oop_counts;
3329 unsigned int nonstatic_oop_map_count = 0;
3330 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3331
3332 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3333 THREAD, int, max_nonstatic_oop_maps);
3334 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3335 THREAD, unsigned int, max_nonstatic_oop_maps);
3336
3337 first_nonstatic_oop_offset = 0; // will be set for first oop field
3338
3339 bool compact_fields = CompactFields;
3340 int allocation_style = FieldsAllocationStyle;
3341 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3342 assert(false, "0 <= FieldsAllocationStyle <= 2");
3343 allocation_style = 1; // Optimistic
3344 }
3345
3346 // The next classes have predefined hard-coded fields offsets
3347 // (see in JavaClasses::compute_hard_coded_offsets()).
3348 // Use default fields allocation order for them.
3349 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3350 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3351 _class_name == vmSymbols::java_lang_Class() ||
3352 _class_name == vmSymbols::java_lang_ClassLoader() ||
3353 _class_name == vmSymbols::java_lang_ref_Reference() ||
3354 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3355 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3356 _class_name == vmSymbols::java_lang_String() ||
3357 _class_name == vmSymbols::java_lang_Throwable() ||
3358 _class_name == vmSymbols::java_lang_Boolean() ||
3359 _class_name == vmSymbols::java_lang_Character() ||
3360 _class_name == vmSymbols::java_lang_Float() ||
3361 _class_name == vmSymbols::java_lang_Double() ||
3362 _class_name == vmSymbols::java_lang_Byte() ||
3363 _class_name == vmSymbols::java_lang_Short() ||
3364 _class_name == vmSymbols::java_lang_Integer() ||
3365 _class_name == vmSymbols::java_lang_Long())) {
3366 allocation_style = 0; // Allocate oops first
3367 compact_fields = false; // Don't compact fields
3368 }
3369
3370 // Rearrange fields for a given allocation style
3371 if( allocation_style == 0 ) {
3372 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3373 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3374 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3375 (nonstatic_oop_count * heapOopSize);
3376 } else if( allocation_style == 1 ) {
3377 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3378 next_nonstatic_double_offset = next_nonstatic_field_offset;
3379 } else if( allocation_style == 2 ) {
3380 // Fields allocation: oops fields in super and sub classes are together.
3381 if( nonstatic_field_size > 0 && _super_klass() != NULL &&
3382 _super_klass->nonstatic_oop_map_size() > 0 ) {
3383 unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3384 OopMapBlock* first_map = _super_klass->start_of_nonstatic_oop_maps();
3385 OopMapBlock* last_map = first_map + map_count - 1;
3386 int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3387 if (next_offset == next_nonstatic_field_offset) {
3388 allocation_style = 0; // allocate oops first
3389 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3390 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3391 (nonstatic_oop_count * heapOopSize);
3392 }
3393 }
3394 if( allocation_style == 2 ) {
3395 allocation_style = 1; // allocate oops last
3396 next_nonstatic_double_offset = next_nonstatic_field_offset;
3397 }
3398 } else {
3399 ShouldNotReachHere();
3400 }
3401
3402 int nonstatic_oop_space_count = 0;
3403 int nonstatic_word_space_count = 0;
3404 int nonstatic_short_space_count = 0;
3405 int nonstatic_byte_space_count = 0;
3406 int nonstatic_oop_space_offset = 0;
3407 int nonstatic_word_space_offset = 0;
3408 int nonstatic_short_space_offset = 0;
3409 int nonstatic_byte_space_offset = 0;
3410
3411 // Try to squeeze some of the fields into the gaps due to
3412 // long/double alignment.
3413 if( nonstatic_double_count > 0 ) {
3414 int offset = next_nonstatic_double_offset;
3415 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3416 if( compact_fields && offset != next_nonstatic_double_offset ) {
3417 // Allocate available fields into the gap before double field.
3418 int length = next_nonstatic_double_offset - offset;
3419 assert(length == BytesPerInt, "");
3420 nonstatic_word_space_offset = offset;
3421 if( nonstatic_word_count > 0 ) {
3422 nonstatic_word_count -= 1;
3423 nonstatic_word_space_count = 1; // Only one will fit
3424 length -= BytesPerInt;
3425 offset += BytesPerInt;
3426 }
3427 nonstatic_short_space_offset = offset;
3428 while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3429 nonstatic_short_count -= 1;
3430 nonstatic_short_space_count += 1;
3431 length -= BytesPerShort;
3432 offset += BytesPerShort;
3433 }
3434 nonstatic_byte_space_offset = offset;
3435 while( length > 0 && nonstatic_byte_count > 0 ) {
3436 nonstatic_byte_count -= 1;
3437 nonstatic_byte_space_count += 1;
3438 length -= 1;
3439 }
3440 // Allocate oop field in the gap if there are no other fields for that.
3441 nonstatic_oop_space_offset = offset;
3442 if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3443 allocation_style != 0 ) { // when oop fields not first
3444 nonstatic_oop_count -= 1;
3445 nonstatic_oop_space_count = 1; // Only one will fit
3446 length -= heapOopSize;
3447 offset += heapOopSize;
3448 }
3449 }
3450 }
3451
3452 next_nonstatic_word_offset = next_nonstatic_double_offset +
3453 (nonstatic_double_count * BytesPerLong);
3454 next_nonstatic_short_offset = next_nonstatic_word_offset +
3455 (nonstatic_word_count * BytesPerInt);
3456 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3457 (nonstatic_short_count * BytesPerShort);
3458 next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3459 nonstatic_byte_count;
3460
3461 // let oops jump before padding with this allocation style
3462 if( allocation_style == 1 ) {
3463 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3464 if( nonstatic_oop_count > 0 ) {
3465 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3466 }
3467 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3468 }
3469
3470 // Iterate over fields again and compute correct offsets.
3471 // The field allocation type was temporarily stored in the offset slot.
3472 // oop fields are located before non-oop fields (static and non-static).
3473 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3474
3475 // skip already laid out fields
3476 if (fs.is_offset_set()) continue;
3477
3478 // contended instance fields are handled below
3479 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3480
3481 int real_offset = 0;
3482 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3483
3484 // pack the rest of the fields
3485 switch (atype) {
3486 case STATIC_OOP:
3487 real_offset = next_static_oop_offset;
3488 next_static_oop_offset += heapOopSize;
3489 break;
3490 case STATIC_BYTE:
3491 real_offset = next_static_byte_offset;
3492 next_static_byte_offset += 1;
3493 break;
3494 case STATIC_SHORT:
3495 real_offset = next_static_short_offset;
3496 next_static_short_offset += BytesPerShort;
3497 break;
3498 case STATIC_WORD:
3499 real_offset = next_static_word_offset;
3500 next_static_word_offset += BytesPerInt;
3501 break;
3502 case STATIC_DOUBLE:
3503 real_offset = next_static_double_offset;
3504 next_static_double_offset += BytesPerLong;
3505 break;
3506 case NONSTATIC_OOP:
3507 if( nonstatic_oop_space_count > 0 ) {
3508 real_offset = nonstatic_oop_space_offset;
3509 nonstatic_oop_space_offset += heapOopSize;
3510 nonstatic_oop_space_count -= 1;
3511 } else {
3512 real_offset = next_nonstatic_oop_offset;
3513 next_nonstatic_oop_offset += heapOopSize;
3514 }
3515
3516 // Record this oop in the oop maps
3517 if( nonstatic_oop_map_count > 0 &&
3518 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3519 real_offset -
3520 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3521 heapOopSize ) {
3522 // This oop is adjacent to the previous one, add to current oop map
3523 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3524 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3525 } else {
3526 // This oop is not adjacent to the previous one, create new oop map
3527 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3528 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3529 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3530 nonstatic_oop_map_count += 1;
3531 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3532 first_nonstatic_oop_offset = real_offset;
3533 }
3534 }
3535 break;
3536 case NONSTATIC_BYTE:
3537 if( nonstatic_byte_space_count > 0 ) {
3538 real_offset = nonstatic_byte_space_offset;
3539 nonstatic_byte_space_offset += 1;
3540 nonstatic_byte_space_count -= 1;
3541 } else {
3542 real_offset = next_nonstatic_byte_offset;
3543 next_nonstatic_byte_offset += 1;
3544 }
3545 break;
3546 case NONSTATIC_SHORT:
3547 if( nonstatic_short_space_count > 0 ) {
3548 real_offset = nonstatic_short_space_offset;
3549 nonstatic_short_space_offset += BytesPerShort;
3550 nonstatic_short_space_count -= 1;
3551 } else {
3552 real_offset = next_nonstatic_short_offset;
3553 next_nonstatic_short_offset += BytesPerShort;
3554 }
3555 break;
3556 case NONSTATIC_WORD:
3557 if( nonstatic_word_space_count > 0 ) {
3558 real_offset = nonstatic_word_space_offset;
3559 nonstatic_word_space_offset += BytesPerInt;
3560 nonstatic_word_space_count -= 1;
3561 } else {
3562 real_offset = next_nonstatic_word_offset;
3563 next_nonstatic_word_offset += BytesPerInt;
3564 }
3565 break;
3566 case NONSTATIC_DOUBLE:
3567 real_offset = next_nonstatic_double_offset;
3568 next_nonstatic_double_offset += BytesPerLong;
3569 break;
3570 default:
3571 ShouldNotReachHere();
3572 }
3573 fs.set_offset(real_offset);
3574 }
3575
3576
3577 // Handle the contended cases.
3578 //
3579 // Each contended field should not intersect the cache line with another contended field.
3580 // In the absence of alignment information, we end up with pessimistically separating
3581 // the fields with full-width padding.
3582 //
3583 // Additionally, this should not break alignment for the fields, so we round the alignment up
3584 // for each field.
3585 if (nonstatic_contended_count > 0) {
3586
3587 // if there is at least one contended field, we need to have pre-padding for them
3588 next_nonstatic_padded_offset += ContendedPaddingWidth;
3589
3590 // collect all contended groups
3591 BitMap bm(_cp->size());
3592 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3593 // skip already laid out fields
3594 if (fs.is_offset_set()) continue;
3595
3596 if (fs.is_contended()) {
3597 bm.set_bit(fs.contended_group());
3598 }
3599 }
3600
3601 int current_group = -1;
3602 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3603
3604 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3605
3606 // skip already laid out fields
3607 if (fs.is_offset_set()) continue;
3608
3609 // skip non-contended fields and fields from different group
3610 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3611
3612 // handle statics below
3613 if (fs.access_flags().is_static()) continue;
3614
3615 int real_offset = 0;
3616 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3617
3618 switch (atype) {
3619 case NONSTATIC_BYTE:
3620 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
3621 real_offset = next_nonstatic_padded_offset;
3622 next_nonstatic_padded_offset += 1;
3623 break;
3624
3625 case NONSTATIC_SHORT:
3626 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
3627 real_offset = next_nonstatic_padded_offset;
3628 next_nonstatic_padded_offset += BytesPerShort;
3629 break;
3630
3631 case NONSTATIC_WORD:
3632 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
3633 real_offset = next_nonstatic_padded_offset;
3634 next_nonstatic_padded_offset += BytesPerInt;
3635 break;
3636
3637 case NONSTATIC_DOUBLE:
3638 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
3639 real_offset = next_nonstatic_padded_offset;
3640 next_nonstatic_padded_offset += BytesPerLong;
3641 break;
3642
3643 case NONSTATIC_OOP:
3644 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
3645 real_offset = next_nonstatic_padded_offset;
3646 next_nonstatic_padded_offset += heapOopSize;
3647
3648 // Record this oop in the oop maps
3649 if( nonstatic_oop_map_count > 0 &&
3650 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3651 real_offset -
3652 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3653 heapOopSize ) {
3654 // This oop is adjacent to the previous one, add to current oop map
3655 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3656 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3657 } else {
3658 // This oop is not adjacent to the previous one, create new oop map
3659 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3660 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3661 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3662 nonstatic_oop_map_count += 1;
3663 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3664 first_nonstatic_oop_offset = real_offset;
3665 }
3666 }
3667 break;
3668
3669 default:
3670 ShouldNotReachHere();
3671 }
3672
3673 if (fs.contended_group() == 0) {
3674 // Contended group defines the equivalence class over the fields:
3675 // the fields within the same contended group are not inter-padded.
3676 // The only exception is default group, which does not incur the
3677 // equivalence, and so requires intra-padding.
3678 next_nonstatic_padded_offset += ContendedPaddingWidth;
3679 }
3680
3681 fs.set_offset(real_offset);
3682 } // for
3683
3684 // Start laying out the next group.
3685 // Note that this will effectively pad the last group in the back;
3686 // this is expected to alleviate memory contention effects for
3687 // subclass fields and/or adjacent object.
3688 // If this was the default group, the padding is already in place.
3689 if (current_group != 0) {
3690 next_nonstatic_padded_offset += ContendedPaddingWidth;
3691 }
3692 }
3693
3694 // handle static fields
3695 }
3696
3697 // Entire class is contended, pad in the back.
3698 // This helps to alleviate memory contention effects for subclass fields
3699 // and/or adjacent object.
3700 if (is_contended_class) {
3701 next_nonstatic_padded_offset += ContendedPaddingWidth;
3702 }
3703
3704 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
3705
3706 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
3707 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
3708 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
3709
3710 int static_field_size = (static_fields_end -
3711 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
3712 nonstatic_field_size = nonstatic_field_size +
3713 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
3714
3715 int instance_size = align_object_size(instance_end / wordSize);
3716
3717 assert(instance_size == align_object_size(align_size_up(
3718 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
3719 wordSize) / wordSize), "consistent layout helper value");
3720
3721 // Invariant: nonstatic_field end/start should only change if there are
3722 // nonstatic fields in the class, or if the class is contended. We compare
3723 // against the non-aligned value, so that end alignment will not fail the
3724 // assert without actually having the fields.
3725 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
3726 is_contended_class ||
3727 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
3728
3729 // Number of non-static oop map blocks allocated at end of klass.
3730 const unsigned int total_oop_map_count =
3731 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
3732 first_nonstatic_oop_offset);
3733
3734 #ifndef PRODUCT
3735 if (PrintFieldLayout) {
3736 print_field_layout(_class_name,
3737 _fields,
3738 _cp,
3739 instance_size,
3740 nonstatic_fields_start,
3741 nonstatic_fields_end,
3742 static_fields_end);
3743 }
3744
3745 #endif
3746 // Pass back information needed for InstanceKlass creation
3747 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
3748 info->nonstatic_oop_counts = nonstatic_oop_counts;
3749 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
3750 info->total_oop_map_count = total_oop_map_count;
3751 info->instance_size = instance_size;
3752 info->static_field_size = static_field_size;
3753 info->nonstatic_field_size = nonstatic_field_size;
3754 info->has_nonstatic_fields = has_nonstatic_fields;
3755 }
3756
3757
3758 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
3759 ClassLoaderData* loader_data,
3760 Handle protection_domain,
3761 KlassHandle host_klass,
3762 GrowableArray<Handle>* cp_patches,
3763 TempNewSymbol& parsed_name,
3764 bool verify,
3765 TRAPS) {
3766
3767 // When a retransformable agent is attached, JVMTI caches the
3768 // class bytes that existed before the first retransformation.
3769 // If RedefineClasses() was used before the retransformable
3770 // agent attached, then the cached class bytes may not be the
3771 // original class bytes.
3772 JvmtiCachedClassFileData *cached_class_file = NULL;
3773 Handle class_loader(THREAD, loader_data->class_loader());
3774 bool has_default_methods = false;
3775 bool declares_default_methods = false;
3776 ResourceMark rm(THREAD);
3777
3778 ClassFileStream* cfs = stream();
3779 // Timing
3780 assert(THREAD->is_Java_thread(), "must be a JavaThread");
3781 JavaThread* jt = (JavaThread*) THREAD;
3782
3783 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
3784 ClassLoader::perf_class_parse_selftime(),
3785 NULL,
3786 jt->get_thread_stat()->perf_recursion_counts_addr(),
3787 jt->get_thread_stat()->perf_timers_addr(),
3788 PerfClassTraceTime::PARSE_CLASS);
3789
3790 init_parsed_class_attributes(loader_data);
3791
3792 if (JvmtiExport::should_post_class_file_load_hook()) {
3793 // Get the cached class file bytes (if any) from the class that
3794 // is being redefined or retransformed. We use jvmti_thread_state()
3795 // instead of JvmtiThreadState::state_for(jt) so we don't allocate
3796 // a JvmtiThreadState any earlier than necessary. This will help
3797 // avoid the bug described by 7126851.
3798 JvmtiThreadState *state = jt->jvmti_thread_state();
3799 if (state != NULL) {
3800 KlassHandle *h_class_being_redefined =
3801 state->get_class_being_redefined();
3802 if (h_class_being_redefined != NULL) {
3803 instanceKlassHandle ikh_class_being_redefined =
3804 instanceKlassHandle(THREAD, (*h_class_being_redefined)());
3805 cached_class_file = ikh_class_being_redefined->get_cached_class_file();
3806 }
3807 }
3808
3809 unsigned char* ptr = cfs->buffer();
3810 unsigned char* end_ptr = cfs->buffer() + cfs->length();
3811
3812 JvmtiExport::post_class_file_load_hook(name, class_loader(), protection_domain,
3813 &ptr, &end_ptr, &cached_class_file);
3814
3815 if (ptr != cfs->buffer()) {
3816 // JVMTI agent has modified class file data.
3817 // Set new class file stream using JVMTI agent modified
3818 // class file data.
3819 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
3820 set_stream(cfs);
3821 }
3822 }
3823
3824 _host_klass = host_klass;
3825 _cp_patches = cp_patches;
3826
3827 instanceKlassHandle nullHandle;
3828
3829 // Figure out whether we can skip format checking (matching classic VM behavior)
3830 if (DumpSharedSpaces) {
3831 // verify == true means it's a 'remote' class (i.e., non-boot class)
3832 // Verification decision is based on BytecodeVerificationRemote flag
3833 // for those classes.
3834 _need_verify = (verify) ? BytecodeVerificationRemote :
3835 BytecodeVerificationLocal;
3836 } else {
3837 _need_verify = Verifier::should_verify_for(class_loader(), verify);
3838 }
3839
3840 // Set the verify flag in stream
3841 cfs->set_verify(_need_verify);
3842
3843 // Save the class file name for easier error message printing.
3844 _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
3845
3846 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
3847 // Magic value
3848 u4 magic = cfs->get_u4_fast();
3849 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
3850 "Incompatible magic value %u in class file %s",
3851 magic, CHECK_(nullHandle));
3852
3853 // Version numbers
3854 u2 minor_version = cfs->get_u2_fast();
3855 u2 major_version = cfs->get_u2_fast();
3856
3857 if (DumpSharedSpaces && major_version < JAVA_1_5_VERSION) {
3858 ResourceMark rm;
3859 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
3860 major_version, minor_version, name->as_C_string());
3861 Exceptions::fthrow(
3862 THREAD_AND_LOCATION,
3863 vmSymbols::java_lang_UnsupportedClassVersionError(),
3864 "Unsupported major.minor version for dump time %u.%u",
3865 major_version,
3866 minor_version);
3867 }
3868
3869 // Check version numbers - we check this even with verifier off
3870 if (!is_supported_version(major_version, minor_version)) {
3871 if (name == NULL) {
3872 Exceptions::fthrow(
3873 THREAD_AND_LOCATION,
3874 vmSymbols::java_lang_UnsupportedClassVersionError(),
3875 "Unsupported class file version %u.%u, "
3876 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
3877 major_version,
3878 minor_version,
3879 JAVA_MAX_SUPPORTED_VERSION,
3880 JAVA_MAX_SUPPORTED_MINOR_VERSION);
3881 } else {
3882 ResourceMark rm(THREAD);
3883 Exceptions::fthrow(
3884 THREAD_AND_LOCATION,
3885 vmSymbols::java_lang_UnsupportedClassVersionError(),
3886 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
3887 "this version of the Java Runtime only recognizes class file versions up to %u.%u",
3888 name->as_C_string(),
3889 major_version,
3890 minor_version,
3891 JAVA_MAX_SUPPORTED_VERSION,
3892 JAVA_MAX_SUPPORTED_MINOR_VERSION);
3893 }
3894 return nullHandle;
3895 }
3896
3897 _major_version = major_version;
3898 _minor_version = minor_version;
3899
3900
3901 // Check if verification needs to be relaxed for this class file
3902 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
3903 _relax_verify = Verifier::relax_verify_for(class_loader());
3904
3905 // Constant pool
3906 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle));
3907
3908 int cp_size = cp->length();
3909
3910 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
3911
3912 // Access flags
3913 AccessFlags access_flags;
3914 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
3915
3916 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3917 // Set abstract bit for old class files for backward compatibility
3918 flags |= JVM_ACC_ABSTRACT;
3919 }
3920 verify_legal_class_modifiers(flags, CHECK_(nullHandle));
3921 access_flags.set_flags(flags);
3922
3923 // This class and superclass
3924 u2 this_class_index = cfs->get_u2_fast();
3925 check_property(
3926 valid_cp_range(this_class_index, cp_size) &&
3927 cp->tag_at(this_class_index).is_unresolved_klass(),
3928 "Invalid this class index %u in constant pool in class file %s",
3929 this_class_index, CHECK_(nullHandle));
3930
3931 Symbol* class_name = cp->klass_name_at(this_class_index);
3932 assert(class_name != NULL, "class_name can't be null");
3933
3934 // It's important to set parsed_name *before* resolving the super class.
3935 // (it's used for cleanup by the caller if parsing fails)
3936 parsed_name = class_name;
3937 // parsed_name is returned and can be used if there's an error, so add to
3938 // its reference count. Caller will decrement the refcount.
3939 parsed_name->increment_refcount();
3940
3941 // Update _class_name which could be null previously to be class_name
3942 _class_name = class_name;
3943
3944 // Don't need to check whether this class name is legal or not.
3945 // It has been checked when constant pool is parsed.
3946 // However, make sure it is not an array type.
3947 if (_need_verify) {
3948 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
3949 "Bad class name in class file %s",
3950 CHECK_(nullHandle));
3951 }
3952
3953 Klass* preserve_this_klass; // for storing result across HandleMark
3954
3955 // release all handles when parsing is done
3956 { HandleMark hm(THREAD);
3957
3958 // Checks if name in class file matches requested name
3959 if (name != NULL && class_name != name) {
3960 ResourceMark rm(THREAD);
3961 Exceptions::fthrow(
3962 THREAD_AND_LOCATION,
3963 vmSymbols::java_lang_NoClassDefFoundError(),
3964 "%s (wrong name: %s)",
3965 name->as_C_string(),
3966 class_name->as_C_string()
3967 );
3968 return nullHandle;
3969 }
3970
3971 if (TraceClassLoadingPreorder) {
3972 tty->print("[Loading %s", (name != NULL) ? name->as_klass_external_name() : "NoName");
3973 if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
3974 tty->print_cr("]");
3975 }
3976 #if INCLUDE_CDS
3977 if (DumpLoadedClassList != NULL && cfs->source() != NULL && classlist_file->is_open()) {
3978 // Only dump the classes that can be stored into CDS archive
3979 if (SystemDictionaryShared::is_sharing_possible(loader_data)) {
3980 if (name != NULL) {
3981 ResourceMark rm(THREAD);
3982 classlist_file->print_cr("%s", name->as_C_string());
3983 classlist_file->flush();
3984 }
3985 }
3986 }
3987 #endif
3988
3989 u2 super_class_index = cfs->get_u2_fast();
3990 instanceKlassHandle super_klass = parse_super_class(super_class_index,
3991 CHECK_NULL);
3992
3993 // Interfaces
3994 u2 itfs_len = cfs->get_u2_fast();
3995 Array<Klass*>* local_interfaces =
3996 parse_interfaces(itfs_len, protection_domain, _class_name,
3997 &has_default_methods, CHECK_(nullHandle));
3998
3999 u2 java_fields_count = 0;
4000 // Fields (offsets are filled in later)
4001 FieldAllocationCount fac;
4002 Array<u2>* fields = parse_fields(class_name,
4003 access_flags.is_interface(),
4004 &fac, &java_fields_count,
4005 CHECK_(nullHandle));
4006 // Methods
4007 bool has_final_method = false;
4008 AccessFlags promoted_flags;
4009 promoted_flags.set_flags(0);
4010 Array<Method*>* methods = parse_methods(access_flags.is_interface(),
4011 &promoted_flags,
4012 &has_final_method,
4013 &declares_default_methods,
4014 CHECK_(nullHandle));
4015
4016 if (declares_default_methods) {
4017 has_default_methods = true;
4018 }
4019
4020 // Additional attributes
4021 ClassAnnotationCollector parsed_annotations;
4022 parse_classfile_attributes(&parsed_annotations, CHECK_(nullHandle));
4023
4024 // Finalize the Annotations metadata object,
4025 // now that all annotation arrays have been created.
4026 create_combined_annotations(CHECK_(nullHandle));
4027
4028 // Make sure this is the end of class file stream
4029 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
4030
4031 // We check super class after class file is parsed and format is checked
4032 if (super_class_index > 0 && super_klass.is_null()) {
4033 Symbol* sk = cp->klass_name_at(super_class_index);
4034 if (access_flags.is_interface()) {
4035 // Before attempting to resolve the superclass, check for class format
4036 // errors not checked yet.
4037 guarantee_property(sk == vmSymbols::java_lang_Object(),
4038 "Interfaces must have java.lang.Object as superclass in class file %s",
4039 CHECK_(nullHandle));
4040 }
4041 Klass* k = SystemDictionary::resolve_super_or_fail(class_name, sk,
4042 class_loader,
4043 protection_domain,
4044 true,
4045 CHECK_(nullHandle));
4046
4047 KlassHandle kh (THREAD, k);
4048 super_klass = instanceKlassHandle(THREAD, kh());
4049 }
4050 if (super_klass.not_null()) {
4051
4052 if (super_klass->has_default_methods()) {
4053 has_default_methods = true;
4054 }
4055
4056 if (super_klass->is_interface()) {
4057 ResourceMark rm(THREAD);
4058 Exceptions::fthrow(
4059 THREAD_AND_LOCATION,
4060 vmSymbols::java_lang_IncompatibleClassChangeError(),
4061 "class %s has interface %s as super class",
4062 class_name->as_klass_external_name(),
4063 super_klass->external_name()
4064 );
4065 return nullHandle;
4066 }
4067 // Make sure super class is not final
4068 if (super_klass->is_final()) {
4069 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
4070 }
4071 }
4072
4073 // save super klass for error handling.
4074 _super_klass = super_klass;
4075
4076 // Compute the transitive list of all unique interfaces implemented by this class
4077 _transitive_interfaces =
4078 compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
4079
4080 // sort methods
4081 intArray* method_ordering = sort_methods(methods);
4082
4083 // promote flags from parse_methods() to the klass' flags
4084 access_flags.add_promoted_flags(promoted_flags.as_int());
4085
4086 // Size of Java vtable (in words)
4087 int vtable_size = 0;
4088 int itable_size = 0;
4089 int num_miranda_methods = 0;
4090
4091 GrowableArray<Method*> all_mirandas(20);
4092
4093 klassVtable::compute_vtable_size_and_num_mirandas(
4094 &vtable_size, &num_miranda_methods, &all_mirandas, super_klass(), methods,
4095 access_flags, class_loader, class_name, local_interfaces,
4096 CHECK_(nullHandle));
4097
4098 // Size of Java itable (in words)
4099 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(_transitive_interfaces);
4100
4101 FieldLayoutInfo info;
4102 layout_fields(class_loader, &fac, &parsed_annotations, &info, CHECK_NULL);
4103
4104 int total_oop_map_size2 =
4105 InstanceKlass::nonstatic_oop_map_size(info.total_oop_map_count);
4106
4107 // Compute reference type
4108 ReferenceType rt;
4109 if (super_klass() == NULL) {
4110 rt = REF_NONE;
4111 } else {
4112 rt = super_klass->reference_type();
4113 }
4114
4115 // We can now create the basic Klass* for this klass
4116 _klass = InstanceKlass::allocate_instance_klass(loader_data,
4117 vtable_size,
4118 itable_size,
4119 info.static_field_size,
4120 total_oop_map_size2,
4121 rt,
4122 access_flags,
4123 name,
4124 super_klass(),
4125 !host_klass.is_null(),
4126 CHECK_(nullHandle));
4127 instanceKlassHandle this_klass (THREAD, _klass);
4128
4129 assert(this_klass->static_field_size() == info.static_field_size, "sanity");
4130 assert(this_klass->nonstatic_oop_map_count() == info.total_oop_map_count,
4131 "sanity");
4132
4133 // Fill in information already parsed
4134 this_klass->set_should_verify_class(verify);
4135 jint lh = Klass::instance_layout_helper(info.instance_size, false);
4136 this_klass->set_layout_helper(lh);
4137 assert(this_klass->is_instance_klass(), "layout is correct");
4138 assert(this_klass->size_helper() == info.instance_size, "correct size_helper");
4139 // Not yet: supers are done below to support the new subtype-checking fields
4140 //this_klass->set_super(super_klass());
4141 this_klass->set_class_loader_data(loader_data);
4142 this_klass->set_nonstatic_field_size(info.nonstatic_field_size);
4143 this_klass->set_has_nonstatic_fields(info.has_nonstatic_fields);
4144 this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
4145
4146 apply_parsed_class_metadata(this_klass, java_fields_count, CHECK_NULL);
4147
4148 if (has_final_method) {
4149 this_klass->set_has_final_method();
4150 }
4151 this_klass->copy_method_ordering(method_ordering, CHECK_NULL);
4152 // The InstanceKlass::_methods_jmethod_ids cache
4153 // is managed on the assumption that the initial cache
4154 // size is equal to the number of methods in the class. If
4155 // that changes, then InstanceKlass::idnum_can_increment()
4156 // has to be changed accordingly.
4157 this_klass->set_initial_method_idnum(methods->length());
4158 this_klass->set_name(cp->klass_name_at(this_class_index));
4159 if (is_anonymous()) // I am well known to myself
4160 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
4161
4162 this_klass->set_minor_version(minor_version);
4163 this_klass->set_major_version(major_version);
4164 this_klass->set_has_default_methods(has_default_methods);
4165 this_klass->set_declares_default_methods(declares_default_methods);
4166
4167 if (!host_klass.is_null()) {
4168 assert (this_klass->is_anonymous(), "should be the same");
4169 this_klass->set_host_klass(host_klass());
4170 }
4171
4172 // Set up Method*::intrinsic_id as soon as we know the names of methods.
4173 // (We used to do this lazily, but now we query it in Rewriter,
4174 // which is eagerly done for every method, so we might as well do it now,
4175 // when everything is fresh in memory.)
4176 vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(this_klass());
4177 if (klass_id != vmSymbols::NO_SID) {
4178 for (int j = 0; j < methods->length(); j++) {
4179 Method* method = methods->at(j);
4180 method->init_intrinsic_id();
4181
4182 if (CheckIntrinsics) {
4183 // Check if an intrinsic is defined for method 'method',
4184 // but the method is not annotated with @HotSpotIntrinsicCandidate.
4185 if (method->intrinsic_id() != vmIntrinsics::_none &&
4186 !method->intrinsic_candidate()) {
4187 tty->print("Compiler intrinsic is defined for method [%s], "
4188 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
4189 method->name_and_sig_as_C_string(),
4190 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
4191 );
4192 tty->cr();
4193 DEBUG_ONLY(vm_exit(1));
4194 }
4195 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
4196 // but there is no intrinsic available for it.
4197 if (method->intrinsic_candidate() &&
4198 method->intrinsic_id() == vmIntrinsics::_none) {
4199 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
4200 "but no compiler intrinsic is defined for the method.%s",
4201 method->name_and_sig_as_C_string(),
4202 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
4203 );
4204 tty->cr();
4205 DEBUG_ONLY(vm_exit(1));
4206 }
4207 }
4208 }
4209
4210 #ifdef ASSERT
4211 if (CheckIntrinsics) {
4212 // Check for orphan methods in the current class. A method m
4213 // of a class C is orphan if an intrinsic is defined for method m,
4214 // but class C does not declare m.
4215 // The check is potentially expensive, therefore it is available
4216 // only in debug builds.
4217
4218 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; id++) {
4219 if (id == vmIntrinsics::_compiledLambdaForm) {
4220 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
4221 // generated for the JVM from a LambdaForm and therefore no method
4222 // is defined for it.
4223 continue;
4224 }
4225
4226 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
4227 // Check if the current class contains a method with the same
4228 // name, flags, signature.
4229 bool match = false;
4230 for (int j = 0; j < methods->length(); j++) {
4231 Method* method = methods->at(j);
4232 if (id == method->intrinsic_id()) {
4233 match = true;
4234 break;
4235 }
4236 }
4237
4238 if (!match) {
4239 char buf[1000];
4240 tty->print("Compiler intrinsic is defined for method [%s], "
4241 "but the method is not available in class [%s].%s",
4242 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id), buf, sizeof(buf)),
4243 this_klass->name()->as_C_string(),
4244 NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
4245 );
4246 tty->cr();
4247 DEBUG_ONLY(vm_exit(1));
4248 }
4249 }
4250 }
4251 }
4252 #endif // ASSERT
4253 }
4254
4255
4256 if (cached_class_file != NULL) {
4257 // JVMTI: we have an InstanceKlass now, tell it about the cached bytes
4258 this_klass->set_cached_class_file(cached_class_file);
4259 }
4260
4261 // Fill in field values obtained by parse_classfile_attributes
4262 if (parsed_annotations.has_any_annotations())
4263 parsed_annotations.apply_to(this_klass);
4264 apply_parsed_class_attributes(this_klass);
4265
4266 // Miranda methods
4267 if ((num_miranda_methods > 0) ||
4268 // if this class introduced new miranda methods or
4269 (super_klass.not_null() && (super_klass->has_miranda_methods()))
4270 // super class exists and this class inherited miranda methods
4271 ) {
4272 this_klass->set_has_miranda_methods(); // then set a flag
4273 }
4274
4275 // Fill in information needed to compute superclasses.
4276 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
4277
4278 // Initialize itable offset tables
4279 klassItable::setup_itable_offset_table(this_klass);
4280
4281 // Compute transitive closure of interfaces this class implements
4282 // Do final class setup
4283 fill_oop_maps(this_klass, info.nonstatic_oop_map_count, info.nonstatic_oop_offsets, info.nonstatic_oop_counts);
4284
4285 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
4286 set_precomputed_flags(this_klass);
4287
4288 // reinitialize modifiers, using the InnerClasses attribute
4289 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
4290 this_klass->set_modifier_flags(computed_modifiers);
4291
4292 // check if this class can access its super class
4293 check_super_class_access(this_klass, CHECK_(nullHandle));
4294
4295 // check if this class can access its superinterfaces
4296 check_super_interface_access(this_klass, CHECK_(nullHandle));
4297
4298 // check if this class overrides any final method
4299 check_final_method_override(this_klass, CHECK_(nullHandle));
4300
4301 // check that if this class is an interface then it doesn't have static methods
4302 if (this_klass->is_interface()) {
4303 /* An interface in a JAVA 8 classfile can be static */
4304 if (_major_version < JAVA_8_VERSION) {
4305 check_illegal_static_method(this_klass, CHECK_(nullHandle));
4306 }
4307 }
4308
4309 // Allocate mirror and initialize static fields
4310 java_lang_Class::create_mirror(this_klass, class_loader, protection_domain,
4311 CHECK_(nullHandle));
4312
4313 // Generate any default methods - default methods are interface methods
4314 // that have a default implementation. This is new with Lambda project.
4315 if (has_default_methods ) {
4316 DefaultMethods::generate_default_methods(
4317 this_klass(), &all_mirandas, CHECK_(nullHandle));
4318 }
4319
4320 // Update the loader_data graph.
4321 record_defined_class_dependencies(this_klass, CHECK_NULL);
4322
4323 ClassLoadingService::notify_class_loaded(InstanceKlass::cast(this_klass()),
4324 false /* not shared class */);
4325
4326 if (TraceClassLoading) {
4327 ResourceMark rm;
4328 // print in a single call to reduce interleaving of output
4329 if (cfs->source() != NULL) {
4330 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
4331 cfs->source());
4332 } else if (class_loader.is_null()) {
4333 Klass* caller =
4334 THREAD->is_Java_thread()
4335 ? ((JavaThread*)THREAD)->security_get_caller_class(1)
4336 : NULL;
4337 // caller can be NULL, for example, during a JVMTI VM_Init hook
4338 if (caller != NULL) {
4339 tty->print("[Loaded %s by instance of %s]\n",
4340 this_klass->external_name(),
4341 caller->external_name());
4342 } else {
4343 tty->print("[Loaded %s]\n", this_klass->external_name());
4344 }
4345 } else {
4346 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
4347 class_loader->klass()->external_name());
4348 }
4349 }
4350
4351 if (TraceClassResolution) {
4352 ResourceMark rm;
4353 // print out the superclass.
4354 const char * from = this_klass()->external_name();
4355 if (this_klass->java_super() != NULL) {
4356 tty->print("RESOLVE %s %s (super)\n", from, this_klass->java_super()->external_name());
4357 }
4358 // print out each of the interface classes referred to by this class.
4359 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4360 if (local_interfaces != NULL) {
4361 int length = local_interfaces->length();
4362 for (int i = 0; i < length; i++) {
4363 Klass* k = local_interfaces->at(i);
4364 const char * to = k->external_name();
4365 tty->print("RESOLVE %s %s (interface)\n", from, to);
4366 }
4367 }
4368 }
4369
4370 // preserve result across HandleMark
4371 preserve_this_klass = this_klass();
4372 }
4373
4374 // Create new handle outside HandleMark (might be needed for
4375 // Extended Class Redefinition)
4376 instanceKlassHandle this_klass (THREAD, preserve_this_klass);
4377 debug_only(this_klass->verify();)
4378
4379 // Clear class if no error has occurred so destructor doesn't deallocate it
4380 _klass = NULL;
4381 return this_klass;
4382 }
4383
4384 // Destructor to clean up if there's an error
4385 ClassFileParser::~ClassFileParser() {
4386 MetadataFactory::free_metadata(_loader_data, _cp);
4387 MetadataFactory::free_array<u2>(_loader_data, _fields);
4388
4389 // Free methods
4390 InstanceKlass::deallocate_methods(_loader_data, _methods);
4391
4392 // beware of the Universe::empty_blah_array!!
4393 if (_inner_classes != Universe::the_empty_short_array()) {
4394 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
4395 }
4396
4397 // Free interfaces
4398 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass(),
4399 _local_interfaces, _transitive_interfaces);
4400
4401 if (_combined_annotations != NULL) {
4402 // After all annotations arrays have been created, they are installed into the
4403 // Annotations object that will be assigned to the InstanceKlass being created.
4404
4405 // Deallocate the Annotations object and the installed annotations arrays.
4406 _combined_annotations->deallocate_contents(_loader_data);
4407
4408 // If the _combined_annotations pointer is non-NULL,
4409 // then the other annotations fields should have been cleared.
4410 assert(_annotations == NULL, "Should have been cleared");
4411 assert(_type_annotations == NULL, "Should have been cleared");
4412 assert(_fields_annotations == NULL, "Should have been cleared");
4413 assert(_fields_type_annotations == NULL, "Should have been cleared");
4414 } else {
4415 // If the annotations arrays were not installed into the Annotations object,
4416 // then they have to be deallocated explicitly.
4417 MetadataFactory::free_array<u1>(_loader_data, _annotations);
4418 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
4419 Annotations::free_contents(_loader_data, _fields_annotations);
4420 Annotations::free_contents(_loader_data, _fields_type_annotations);
4421 }
4422
4423 clear_class_metadata();
4424
4425 // deallocate the klass if already created. Don't directly deallocate, but add
4426 // to the deallocate list so that the klass is removed from the CLD::_klasses list
4427 // at a safepoint.
4428 if (_klass != NULL) {
4429 _loader_data->add_to_deallocate_list(_klass);
4430 }
4431 _klass = NULL;
4432 }
4433
4434 void ClassFileParser::print_field_layout(Symbol* name,
4435 Array<u2>* fields,
4436 const constantPoolHandle& cp,
4437 int instance_size,
4438 int instance_fields_start,
4439 int instance_fields_end,
4440 int static_fields_end) {
4441 tty->print("%s: field layout\n", name->as_klass_external_name());
4442 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
4443 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
4444 if (!fs.access_flags().is_static()) {
4445 tty->print(" @%3d \"%s\" %s\n",
4446 fs.offset(),
4447 fs.name()->as_klass_external_name(),
4448 fs.signature()->as_klass_external_name());
4449 }
4450 }
4451 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
4452 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
4453 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
4454 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
4455 if (fs.access_flags().is_static()) {
4456 tty->print(" @%3d \"%s\" %s\n",
4457 fs.offset(),
4458 fs.name()->as_klass_external_name(),
4459 fs.signature()->as_klass_external_name());
4460 }
4461 }
4462 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
4463 tty->print("\n");
4464 }
4465
4466 unsigned int
4467 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
4468 unsigned int nonstatic_oop_map_count,
4469 int first_nonstatic_oop_offset) {
4470 unsigned int map_count =
4471 super.is_null() ? 0 : super->nonstatic_oop_map_count();
4472 if (nonstatic_oop_map_count > 0) {
4473 // We have oops to add to map
4474 if (map_count == 0) {
4475 map_count = nonstatic_oop_map_count;
4476 } else {
4477 // Check whether we should add a new map block or whether the last one can
4478 // be extended
4479 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
4480 OopMapBlock* const last_map = first_map + map_count - 1;
4481
4482 int next_offset = last_map->offset() + last_map->count() * heapOopSize;
4483 if (next_offset == first_nonstatic_oop_offset) {
4484 // There is no gap bettwen superklass's last oop field and first
4485 // local oop field, merge maps.
4486 nonstatic_oop_map_count -= 1;
4487 } else {
4488 // Superklass didn't end with a oop field, add extra maps
4489 assert(next_offset < first_nonstatic_oop_offset, "just checking");
4490 }
4491 map_count += nonstatic_oop_map_count;
4492 }
4493 }
4494 return map_count;
4495 }
4496
4497
4498 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
4499 unsigned int nonstatic_oop_map_count,
4500 int* nonstatic_oop_offsets,
4501 unsigned int* nonstatic_oop_counts) {
4502 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4503 const InstanceKlass* const super = k->superklass();
4504 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4505 if (super_count > 0) {
4506 // Copy maps from superklass
4507 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4508 for (unsigned int i = 0; i < super_count; ++i) {
4509 *this_oop_map++ = *super_oop_map++;
4510 }
4511 }
4512
4513 if (nonstatic_oop_map_count > 0) {
4514 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4515 // The counts differ because there is no gap between superklass's last oop
4516 // field and the first local oop field. Extend the last oop map copied
4517 // from the superklass instead of creating new one.
4518 nonstatic_oop_map_count--;
4519 nonstatic_oop_offsets++;
4520 this_oop_map--;
4521 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4522 this_oop_map++;
4523 }
4524
4525 // Add new map blocks, fill them
4526 while (nonstatic_oop_map_count-- > 0) {
4527 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4528 this_oop_map->set_count(*nonstatic_oop_counts++);
4529 this_oop_map++;
4530 }
4531 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4532 this_oop_map, "sanity");
4533 }
4534 }
4535
4536
4537 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
4538 Klass* super = k->super();
4539
4540 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4541 // in which case we don't have to register objects as finalizable
4542 if (!_has_empty_finalizer) {
4543 if (_has_finalizer ||
4544 (super != NULL && super->has_finalizer())) {
4545 k->set_has_finalizer();
4546 }
4547 }
4548
4549 #ifdef ASSERT
4550 bool f = false;
4551 Method* m = k->lookup_method(vmSymbols::finalize_method_name(),
4552 vmSymbols::void_method_signature());
4553 if (m != NULL && !m->is_empty_method()) {
4554 f = true;
4555 }
4556
4557 // Spec doesn't prevent agent from redefinition of empty finalizer.
4558 // Despite the fact that it's generally bad idea and redefined finalizer
4559 // will not work as expected we shouldn't abort vm in this case
4560 if (!k->has_redefined_this_or_super()) {
4561 assert(f == k->has_finalizer(), "inconsistent has_finalizer");
4562 }
4563 #endif
4564
4565 // Check if this klass supports the java.lang.Cloneable interface
4566 if (SystemDictionary::Cloneable_klass_loaded()) {
4567 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4568 k->set_is_cloneable();
4569 }
4570 }
4571
4572 // Check if this klass has a vanilla default constructor
4573 if (super == NULL) {
4574 // java.lang.Object has empty default constructor
4575 k->set_has_vanilla_constructor();
4576 } else {
4577 if (super->has_vanilla_constructor() &&
4578 _has_vanilla_constructor) {
4579 k->set_has_vanilla_constructor();
4580 }
4581 #ifdef ASSERT
4582 bool v = false;
4583 if (super->has_vanilla_constructor()) {
4584 Method* constructor = k->find_method(vmSymbols::object_initializer_name(
4585 ), vmSymbols::void_method_signature());
4586 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4587 v = true;
4588 }
4589 }
4590 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4591 #endif
4592 }
4593
4594 // If it cannot be fast-path allocated, set a bit in the layout helper.
4595 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4596 assert(k->size_helper() > 0, "layout_helper is initialized");
4597 if ((!RegisterFinalizersAtInit && k->has_finalizer())
4598 || k->is_abstract() || k->is_interface()
4599 || (k->name() == vmSymbols::java_lang_Class() && k->class_loader() == NULL)
4600 || k->size_helper() >= FastAllocateSizeLimit) {
4601 // Forbid fast-path allocation.
4602 jint lh = Klass::instance_layout_helper(k->size_helper(), true);
4603 k->set_layout_helper(lh);
4604 }
4605 }
4606
4607 // Attach super classes and interface classes to class loader data
4608 void ClassFileParser::record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS) {
4609 ClassLoaderData * defining_loader_data = defined_klass->class_loader_data();
4610 if (defining_loader_data->is_the_null_class_loader_data()) {
4611 // Dependencies to null class loader data are implicit.
4612 return;
4613 } else {
4614 // add super class dependency
4615 Klass* super = defined_klass->super();
4616 if (super != NULL) {
4617 defining_loader_data->record_dependency(super, CHECK);
4618 }
4619
4620 // add super interface dependencies
4621 Array<Klass*>* local_interfaces = defined_klass->local_interfaces();
4622 if (local_interfaces != NULL) {
4623 int length = local_interfaces->length();
4624 for (int i = 0; i < length; i++) {
4625 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4626 }
4627 }
4628 }
4629 }
4630
4631 // utility methods for appending an array with check for duplicates
4632
4633 void append_interfaces(GrowableArray<Klass*>* result, Array<Klass*>* ifs) {
4634 // iterate over new interfaces
4635 for (int i = 0; i < ifs->length(); i++) {
4636 Klass* e = ifs->at(i);
4637 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4638 // add new interface
4639 result->append_if_missing(e);
4640 }
4641 }
4642
4643 Array<Klass*>* ClassFileParser::compute_transitive_interfaces(
4644 instanceKlassHandle super,
4645 Array<Klass*>* local_ifs, TRAPS) {
4646 // Compute maximum size for transitive interfaces
4647 int max_transitive_size = 0;
4648 int super_size = 0;
4649 // Add superclass transitive interfaces size
4650 if (super.not_null()) {
4651 super_size = super->transitive_interfaces()->length();
4652 max_transitive_size += super_size;
4653 }
4654 // Add local interfaces' super interfaces
4655 int local_size = local_ifs->length();
4656 for (int i = 0; i < local_size; i++) {
4657 Klass* l = local_ifs->at(i);
4658 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4659 }
4660 // Finally add local interfaces
4661 max_transitive_size += local_size;
4662 // Construct array
4663 if (max_transitive_size == 0) {
4664 // no interfaces, use canonicalized array
4665 return Universe::the_empty_klass_array();
4666 } else if (max_transitive_size == super_size) {
4667 // no new local interfaces added, share superklass' transitive interface array
4668 return super->transitive_interfaces();
4669 } else if (max_transitive_size == local_size) {
4670 // only local interfaces added, share local interface array
4671 return local_ifs;
4672 } else {
4673 ResourceMark rm;
4674 GrowableArray<Klass*>* result = new GrowableArray<Klass*>(max_transitive_size);
4675
4676 // Copy down from superclass
4677 if (super.not_null()) {
4678 append_interfaces(result, super->transitive_interfaces());
4679 }
4680
4681 // Copy down from local interfaces' superinterfaces
4682 for (int i = 0; i < local_ifs->length(); i++) {
4683 Klass* l = local_ifs->at(i);
4684 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4685 }
4686 // Finally add local interfaces
4687 append_interfaces(result, local_ifs);
4688
4689 // length will be less than the max_transitive_size if duplicates were removed
4690 int length = result->length();
4691 assert(length <= max_transitive_size, "just checking");
4692 Array<Klass*>* new_result = MetadataFactory::new_array<Klass*>(_loader_data, length, CHECK_NULL);
4693 for (int i = 0; i < length; i++) {
4694 Klass* e = result->at(i);
4695 assert(e != NULL, "just checking");
4696 new_result->at_put(i, e);
4697 }
4698 return new_result;
4699 }
4700 }
4701
4702 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
4703 Klass* super = this_klass->super();
4704 if ((super != NULL) &&
4705 (!Reflection::verify_class_access(this_klass(), super, false))) {
4706 ResourceMark rm(THREAD);
4707 Exceptions::fthrow(
4708 THREAD_AND_LOCATION,
4709 vmSymbols::java_lang_IllegalAccessError(),
4710 "class %s cannot access its superclass %s",
4711 this_klass->external_name(),
4712 super->external_name()
4713 );
4714 return;
4715 }
4716 }
4717
4718
4719 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
4720 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4721 int lng = local_interfaces->length();
4722 for (int i = lng - 1; i >= 0; i--) {
4723 Klass* k = local_interfaces->at(i);
4724 assert (k != NULL && k->is_interface(), "invalid interface");
4725 if (!Reflection::verify_class_access(this_klass(), k, false)) {
4726 ResourceMark rm(THREAD);
4727 Exceptions::fthrow(
4728 THREAD_AND_LOCATION,
4729 vmSymbols::java_lang_IllegalAccessError(),
4730 "class %s cannot access its superinterface %s",
4731 this_klass->external_name(),
4732 k->external_name()
4733 );
4734 return;
4735 }
4736 }
4737 }
4738
4739
4740 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
4741 Array<Method*>* methods = this_klass->methods();
4742 int num_methods = methods->length();
4743
4744 // go thru each method and check if it overrides a final method
4745 for (int index = 0; index < num_methods; index++) {
4746 Method* m = methods->at(index);
4747
4748 // skip private, static, and <init> methods
4749 if ((!m->is_private() && !m->is_static()) &&
4750 (m->name() != vmSymbols::object_initializer_name())) {
4751
4752 Symbol* name = m->name();
4753 Symbol* signature = m->signature();
4754 Klass* k = this_klass->super();
4755 Method* super_m = NULL;
4756 while (k != NULL) {
4757 // skip supers that don't have final methods.
4758 if (k->has_final_method()) {
4759 // lookup a matching method in the super class hierarchy
4760 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4761 if (super_m == NULL) {
4762 break; // didn't find any match; get out
4763 }
4764
4765 if (super_m->is_final() && !super_m->is_static() &&
4766 // matching method in super is final, and not static
4767 (Reflection::verify_field_access(this_klass(),
4768 super_m->method_holder(),
4769 super_m->method_holder(),
4770 super_m->access_flags(), false))
4771 // this class can access super final method and therefore override
4772 ) {
4773 ResourceMark rm(THREAD);
4774 Exceptions::fthrow(
4775 THREAD_AND_LOCATION,
4776 vmSymbols::java_lang_VerifyError(),
4777 "class %s overrides final method %s.%s%s",
4778 this_klass->external_name(),
4779 super_m->method_holder()->external_name(),
4780 name->as_C_string(),
4781 signature->as_C_string()
4782 );
4783 return;
4784 }
4785
4786 // continue to look from super_m's holder's super.
4787 k = super_m->method_holder()->super();
4788 continue;
4789 }
4790
4791 k = k->super();
4792 }
4793 }
4794 }
4795 }
4796
4797
4798 // assumes that this_klass is an interface
4799 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
4800 assert(this_klass->is_interface(), "not an interface");
4801 Array<Method*>* methods = this_klass->methods();
4802 int num_methods = methods->length();
4803
4804 for (int index = 0; index < num_methods; index++) {
4805 Method* m = methods->at(index);
4806 // if m is static and not the init method, throw a verify error
4807 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4808 ResourceMark rm(THREAD);
4809 Exceptions::fthrow(
4810 THREAD_AND_LOCATION,
4811 vmSymbols::java_lang_VerifyError(),
4812 "Illegal static method %s in interface %s",
4813 m->name()->as_C_string(),
4814 this_klass->external_name()
4815 );
4816 return;
4817 }
4818 }
4819 }
4820
4821 // utility methods for format checking
4822
4823 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
4824 if (!_need_verify) { return; }
4825
4826 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4827 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4828 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4829 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4830 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4831 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4832 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4833
4834 if ((is_abstract && is_final) ||
4835 (is_interface && !is_abstract) ||
4836 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4837 (!is_interface && major_gte_15 && is_annotation)) {
4838 ResourceMark rm(THREAD);
4839 Exceptions::fthrow(
4840 THREAD_AND_LOCATION,
4841 vmSymbols::java_lang_ClassFormatError(),
4842 "Illegal class modifiers in class %s: 0x%X",
4843 _class_name->as_C_string(), flags
4844 );
4845 return;
4846 }
4847 }
4848
4849 bool ClassFileParser::has_illegal_visibility(jint flags) {
4850 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4851 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4852 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4853
4854 return ((is_public && is_protected) ||
4855 (is_public && is_private) ||
4856 (is_protected && is_private));
4857 }
4858
4859 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
4860 u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4861 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4862 (major <= max_version) &&
4863 ((major != max_version) ||
4864 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4865 }
4866
4867 void ClassFileParser::verify_legal_field_modifiers(
4868 jint flags, bool is_interface, TRAPS) {
4869 if (!_need_verify) { return; }
4870
4871 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4872 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4873 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4874 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4875 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4876 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4877 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4878 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4879 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4880
4881 bool is_illegal = false;
4882
4883 if (is_interface) {
4884 if (!is_public || !is_static || !is_final || is_private ||
4885 is_protected || is_volatile || is_transient ||
4886 (major_gte_15 && is_enum)) {
4887 is_illegal = true;
4888 }
4889 } else { // not interface
4890 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4891 is_illegal = true;
4892 }
4893 }
4894
4895 if (is_illegal) {
4896 ResourceMark rm(THREAD);
4897 Exceptions::fthrow(
4898 THREAD_AND_LOCATION,
4899 vmSymbols::java_lang_ClassFormatError(),
4900 "Illegal field modifiers in class %s: 0x%X",
4901 _class_name->as_C_string(), flags);
4902 return;
4903 }
4904 }
4905
4906 void ClassFileParser::verify_legal_method_modifiers(
4907 jint flags, bool is_interface, Symbol* name, TRAPS) {
4908 if (!_need_verify) { return; }
4909
4910 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4911 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4912 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4913 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4914 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4915 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4916 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4917 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4918 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4919 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4920 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4921 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4922 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4923
4924 bool is_illegal = false;
4925
4926 if (is_interface) {
4927 if (major_gte_8) {
4928 // Class file version is JAVA_8_VERSION or later Methods of
4929 // interfaces may set any of the flags except ACC_PROTECTED,
4930 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4931 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4932 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4933 (is_native || is_protected || is_final || is_synchronized) ||
4934 // If a specific method of a class or interface has its
4935 // ACC_ABSTRACT flag set, it must not have any of its
4936 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4937 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4938 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4939 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4940 (is_abstract && (is_private || is_static || is_strict))) {
4941 is_illegal = true;
4942 }
4943 } else if (major_gte_15) {
4944 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4945 if (!is_public || is_static || is_final || is_synchronized ||
4946 is_native || !is_abstract || is_strict) {
4947 is_illegal = true;
4948 }
4949 } else {
4950 // Class file version is pre-JAVA_1_5_VERSION
4951 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4952 is_illegal = true;
4953 }
4954 }
4955 } else { // not interface
4956 if (has_illegal_visibility(flags)) {
4957 is_illegal = true;
4958 } else {
4959 if (is_initializer) {
4960 if (is_static || is_final || is_synchronized || is_native ||
4961 is_abstract || (major_gte_15 && is_bridge)) {
4962 is_illegal = true;
4963 }
4964 } else { // not initializer
4965 if (is_abstract) {
4966 if ((is_final || is_native || is_private || is_static ||
4967 (major_gte_15 && (is_synchronized || is_strict)))) {
4968 is_illegal = true;
4969 }
4970 }
4971 }
4972 }
4973 }
4974
4975 if (is_illegal) {
4976 ResourceMark rm(THREAD);
4977 Exceptions::fthrow(
4978 THREAD_AND_LOCATION,
4979 vmSymbols::java_lang_ClassFormatError(),
4980 "Method %s in class %s has illegal modifiers: 0x%X",
4981 name->as_C_string(), _class_name->as_C_string(), flags);
4982 return;
4983 }
4984 }
4985
4986 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4987 assert(_need_verify, "only called when _need_verify is true");
4988 int i = 0;
4989 int count = length >> 2;
4990 for (int k=0; k<count; k++) {
4991 unsigned char b0 = buffer[i];
4992 unsigned char b1 = buffer[i+1];
4993 unsigned char b2 = buffer[i+2];
4994 unsigned char b3 = buffer[i+3];
4995 // For an unsigned char v,
4996 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4997 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4998 unsigned char res = b0 | b0 - 1 |
4999 b1 | b1 - 1 |
5000 b2 | b2 - 1 |
5001 b3 | b3 - 1;
5002 if (res >= 128) break;
5003 i += 4;
5004 }
5005 for(; i < length; i++) {
5006 unsigned short c;
5007 // no embedded zeros
5008 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
5009 if(buffer[i] < 128) {
5010 continue;
5011 }
5012 if ((i + 5) < length) { // see if it's legal supplementary character
5013 if (UTF8::is_supplementary_character(&buffer[i])) {
5014 c = UTF8::get_supplementary_character(&buffer[i]);
5015 i += 5;
5016 continue;
5017 }
5018 }
5019 switch (buffer[i] >> 4) {
5020 default: break;
5021 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
5022 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5023 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
5024 c = (buffer[i] & 0x1F) << 6;
5025 i++;
5026 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
5027 c += buffer[i] & 0x3F;
5028 if (_major_version <= 47 || c == 0 || c >= 0x80) {
5029 // for classes with major > 47, c must a null or a character in its shortest form
5030 break;
5031 }
5032 }
5033 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5034 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
5035 c = (buffer[i] & 0xF) << 12;
5036 i += 2;
5037 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
5038 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
5039 if (_major_version <= 47 || c >= 0x800) {
5040 // for classes with major > 47, c must be in its shortest form
5041 break;
5042 }
5043 }
5044 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5045 } // end of switch
5046 } // end of for
5047 }
5048
5049 // Checks if name is a legal class name.
5050 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
5051 if (!_need_verify || _relax_verify) { return; }
5052
5053 char buf[fixed_buffer_size];
5054 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5055 unsigned int length = name->utf8_length();
5056 bool legal = false;
5057
5058 if (length > 0) {
5059 char* p;
5060 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5061 p = skip_over_field_signature(bytes, false, length, CHECK);
5062 legal = (p != NULL) && ((p - bytes) == (int)length);
5063 } else if (_major_version < JAVA_1_5_VERSION) {
5064 if (bytes[0] != '<') {
5065 p = skip_over_field_name(bytes, true, length);
5066 legal = (p != NULL) && ((p - bytes) == (int)length);
5067 }
5068 } else {
5069 // 4900761: relax the constraints based on JSR202 spec
5070 // Class names may be drawn from the entire Unicode character set.
5071 // Identifiers between '/' must be unqualified names.
5072 // The utf8 string has been verified when parsing cpool entries.
5073 legal = verify_unqualified_name(bytes, length, LegalClass);
5074 }
5075 }
5076 if (!legal) {
5077 ResourceMark rm(THREAD);
5078 Exceptions::fthrow(
5079 THREAD_AND_LOCATION,
5080 vmSymbols::java_lang_ClassFormatError(),
5081 "Illegal class name \"%s\" in class file %s", bytes,
5082 _class_name->as_C_string()
5083 );
5084 return;
5085 }
5086 }
5087
5088 // Checks if name is a legal field name.
5089 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
5090 if (!_need_verify || _relax_verify) { return; }
5091
5092 char buf[fixed_buffer_size];
5093 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5094 unsigned int length = name->utf8_length();
5095 bool legal = false;
5096
5097 if (length > 0) {
5098 if (_major_version < JAVA_1_5_VERSION) {
5099 if (bytes[0] != '<') {
5100 char* p = skip_over_field_name(bytes, false, length);
5101 legal = (p != NULL) && ((p - bytes) == (int)length);
5102 }
5103 } else {
5104 // 4881221: relax the constraints based on JSR202 spec
5105 legal = verify_unqualified_name(bytes, length, LegalField);
5106 }
5107 }
5108
5109 if (!legal) {
5110 ResourceMark rm(THREAD);
5111 Exceptions::fthrow(
5112 THREAD_AND_LOCATION,
5113 vmSymbols::java_lang_ClassFormatError(),
5114 "Illegal field name \"%s\" in class %s", bytes,
5115 _class_name->as_C_string()
5116 );
5117 return;
5118 }
5119 }
5120
5121 // Checks if name is a legal method name.
5122 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
5123 if (!_need_verify || _relax_verify) { return; }
5124
5125 assert(name != NULL, "method name is null");
5126 char buf[fixed_buffer_size];
5127 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5128 unsigned int length = name->utf8_length();
5129 bool legal = false;
5130
5131 if (length > 0) {
5132 if (bytes[0] == '<') {
5133 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5134 legal = true;
5135 }
5136 } else if (_major_version < JAVA_1_5_VERSION) {
5137 char* p;
5138 p = skip_over_field_name(bytes, false, length);
5139 legal = (p != NULL) && ((p - bytes) == (int)length);
5140 } else {
5141 // 4881221: relax the constraints based on JSR202 spec
5142 legal = verify_unqualified_name(bytes, length, LegalMethod);
5143 }
5144 }
5145
5146 if (!legal) {
5147 ResourceMark rm(THREAD);
5148 Exceptions::fthrow(
5149 THREAD_AND_LOCATION,
5150 vmSymbols::java_lang_ClassFormatError(),
5151 "Illegal method name \"%s\" in class %s", bytes,
5152 _class_name->as_C_string()
5153 );
5154 return;
5155 }
5156 }
5157
5158
5159 // Checks if signature is a legal field signature.
5160 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
5161 if (!_need_verify) { return; }
5162
5163 char buf[fixed_buffer_size];
5164 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5165 unsigned int length = signature->utf8_length();
5166 char* p = skip_over_field_signature(bytes, false, length, CHECK);
5167
5168 if (p == NULL || (p - bytes) != (int)length) {
5169 throwIllegalSignature("Field", name, signature, CHECK);
5170 }
5171 }
5172
5173 // Checks if signature is a legal method signature.
5174 // Returns number of parameters
5175 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
5176 if (!_need_verify) {
5177 // make sure caller's args_size will be less than 0 even for non-static
5178 // method so it will be recomputed in compute_size_of_parameters().
5179 return -2;
5180 }
5181
5182 // Class initializers cannot have args for class format version >= 51.
5183 if (name == vmSymbols::class_initializer_name() &&
5184 signature != vmSymbols::void_method_signature() &&
5185 _major_version >= JAVA_7_VERSION) {
5186 throwIllegalSignature("Method", name, signature, CHECK_0);
5187 return 0;
5188 }
5189
5190 unsigned int args_size = 0;
5191 char buf[fixed_buffer_size];
5192 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5193 unsigned int length = signature->utf8_length();
5194 char* nextp;
5195
5196 // The first character must be a '('
5197 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5198 length--;
5199 // Skip over legal field signatures
5200 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5201 while ((length > 0) && (nextp != NULL)) {
5202 args_size++;
5203 if (p[0] == 'J' || p[0] == 'D') {
5204 args_size++;
5205 }
5206 length -= nextp - p;
5207 p = nextp;
5208 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5209 }
5210 // The first non-signature thing better be a ')'
5211 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5212 length--;
5213 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5214 // All internal methods must return void
5215 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5216 return args_size;
5217 }
5218 } else {
5219 // Now we better just have a return value
5220 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5221 if (nextp && ((int)length == (nextp - p))) {
5222 return args_size;
5223 }
5224 }
5225 }
5226 }
5227 // Report error
5228 throwIllegalSignature("Method", name, signature, CHECK_0);
5229 return 0;
5230 }
5231
5232
5233 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5234 // Method names also may not contain the characters '<' or '>', unless <init>
5235 // or <clinit>. Note that method names may not be <init> or <clinit> in this
5236 // method. Because these names have been checked as special cases before
5237 // calling this method in verify_legal_method_name.
5238 bool ClassFileParser::verify_unqualified_name(
5239 char* name, unsigned int length, int type) {
5240 jchar ch;
5241
5242 for (char* p = name; p != name + length; ) {
5243 ch = *p;
5244 if (ch < 128) {
5245 p++;
5246 if (ch == '.' || ch == ';' || ch == '[' ) {
5247 return false; // do not permit '.', ';', or '['
5248 }
5249 if (type != LegalClass && ch == '/') {
5250 return false; // do not permit '/' unless it's class name
5251 }
5252 if (type == LegalMethod && (ch == '<' || ch == '>')) {
5253 return false; // do not permit '<' or '>' in method names
5254 }
5255 } else {
5256 char* tmp_p = UTF8::next(p, &ch);
5257 p = tmp_p;
5258 }
5259 }
5260 return true;
5261 }
5262
5263
5264 // Take pointer to a string. Skip over the longest part of the string that could
5265 // be taken as a fieldname. Allow '/' if slash_ok is true.
5266 // Return a pointer to just past the fieldname.
5267 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5268 // being true, we saw consecutive slashes (meaning we were looking for a
5269 // qualified path but found something that was badly-formed).
5270 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
5271 char* p;
5272 jchar ch;
5273 jboolean last_is_slash = false;
5274 jboolean not_first_ch = false;
5275
5276 for (p = name; p != name + length; not_first_ch = true) {
5277 char* old_p = p;
5278 ch = *p;
5279 if (ch < 128) {
5280 p++;
5281 // quick check for ascii
5282 if ((ch >= 'a' && ch <= 'z') ||
5283 (ch >= 'A' && ch <= 'Z') ||
5284 (ch == '_' || ch == '$') ||
5285 (not_first_ch && ch >= '0' && ch <= '9')) {
5286 last_is_slash = false;
5287 continue;
5288 }
5289 if (slash_ok && ch == '/') {
5290 if (last_is_slash) {
5291 return NULL; // Don't permit consecutive slashes
5292 }
5293 last_is_slash = true;
5294 continue;
5295 }
5296 } else {
5297 jint unicode_ch;
5298 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5299 p = tmp_p;
5300 last_is_slash = false;
5301 // Check if ch is Java identifier start or is Java identifier part
5302 // 4672820: call java.lang.Character methods directly without generating separate tables.
5303 EXCEPTION_MARK;
5304 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
5305
5306 // return value
5307 JavaValue result(T_BOOLEAN);
5308 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
5309 JavaCallArguments args;
5310 args.push_int(unicode_ch);
5311
5312 // public static boolean isJavaIdentifierStart(char ch);
5313 JavaCalls::call_static(&result,
5314 klass,
5315 vmSymbols::isJavaIdentifierStart_name(),
5316 vmSymbols::int_bool_signature(),
5317 &args,
5318 THREAD);
5319
5320 if (HAS_PENDING_EXCEPTION) {
5321 CLEAR_PENDING_EXCEPTION;
5322 return 0;
5323 }
5324 if (result.get_jboolean()) {
5325 continue;
5326 }
5327
5328 if (not_first_ch) {
5329 // public static boolean isJavaIdentifierPart(char ch);
5330 JavaCalls::call_static(&result,
5331 klass,
5332 vmSymbols::isJavaIdentifierPart_name(),
5333 vmSymbols::int_bool_signature(),
5334 &args,
5335 THREAD);
5336
5337 if (HAS_PENDING_EXCEPTION) {
5338 CLEAR_PENDING_EXCEPTION;
5339 return 0;
5340 }
5341
5342 if (result.get_jboolean()) {
5343 continue;
5344 }
5345 }
5346 }
5347 return (not_first_ch) ? old_p : NULL;
5348 }
5349 return (not_first_ch) ? p : NULL;
5350 }
5351
5352
5353 // Take pointer to a string. Skip over the longest part of the string that could
5354 // be taken as a field signature. Allow "void" if void_ok.
5355 // Return a pointer to just past the signature.
5356 // Return NULL if no legal signature is found.
5357 char* ClassFileParser::skip_over_field_signature(char* signature,
5358 bool void_ok,
5359 unsigned int length,
5360 TRAPS) {
5361 unsigned int array_dim = 0;
5362 while (length > 0) {
5363 switch (signature[0]) {
5364 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5365 case JVM_SIGNATURE_BOOLEAN:
5366 case JVM_SIGNATURE_BYTE:
5367 case JVM_SIGNATURE_CHAR:
5368 case JVM_SIGNATURE_SHORT:
5369 case JVM_SIGNATURE_INT:
5370 case JVM_SIGNATURE_FLOAT:
5371 case JVM_SIGNATURE_LONG:
5372 case JVM_SIGNATURE_DOUBLE:
5373 return signature + 1;
5374 case JVM_SIGNATURE_CLASS: {
5375 if (_major_version < JAVA_1_5_VERSION) {
5376 // Skip over the class name if one is there
5377 char* p = skip_over_field_name(signature + 1, true, --length);
5378
5379 // The next character better be a semicolon
5380 if (p && (p - signature) > 1 && p[0] == ';') {
5381 return p + 1;
5382 }
5383 } else {
5384 // 4900761: For class version > 48, any unicode is allowed in class name.
5385 length--;
5386 signature++;
5387 while (length > 0 && signature[0] != ';') {
5388 if (signature[0] == '.') {
5389 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
5390 }
5391 length--;
5392 signature++;
5393 }
5394 if (signature[0] == ';') { return signature + 1; }
5395 }
5396
5397 return NULL;
5398 }
5399 case JVM_SIGNATURE_ARRAY:
5400 array_dim++;
5401 if (array_dim > 255) {
5402 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5403 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5404 }
5405 // The rest of what's there better be a legal signature
5406 signature++;
5407 length--;
5408 void_ok = false;
5409 break;
5410
5411 default:
5412 return NULL;
5413 }
5414 }
5415 return NULL;
5416 }