1 /*
2 * Copyright (c) 1997, 2014, 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.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/defaultMethods.hpp"
31 #include "classfile/javaClasses.hpp"
32 #include "classfile/symbolTable.hpp"
33 #include "classfile/systemDictionary.hpp"
34 #include "classfile/verificationType.hpp"
35 #include "classfile/verifier.hpp"
36 #include "classfile/vmSymbols.hpp"
37 #include "memory/allocation.hpp"
38 #include "memory/gcLocker.hpp"
39 #include "memory/metadataFactory.hpp"
40 #include "memory/oopFactory.hpp"
41 #include "memory/referenceType.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/globalDefinitions.hpp"
63
64 // We generally try to create the oops directly when parsing, rather than
65 // allocating temporary data structures and copying the bytes twice. A
66 // temporary area is only needed when parsing utf8 entries in the constant
67 // pool and when parsing line number tables.
68
69 // We add assert in debug mode when class format is not checked.
70
71 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
72 #define JAVA_MIN_SUPPORTED_VERSION 45
73 #define JAVA_MAX_SUPPORTED_VERSION 52
74 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
75
76 // Used for two backward compatibility reasons:
77 // - to check for new additions to the class file format in JDK1.5
78 // - to check for bug fixes in the format checker in JDK1.5
79 #define JAVA_1_5_VERSION 49
80
81 // Used for backward compatibility reasons:
82 // - to check for javac bug fixes that happened after 1.5
83 // - also used as the max version when running in jdk6
84 #define JAVA_6_VERSION 50
85
86 // Used for backward compatibility reasons:
87 // - to check NameAndType_info signatures more aggressively
88 #define JAVA_7_VERSION 51
89
90 // Extension method support.
91 #define JAVA_8_VERSION 52
92
93 void ClassFileParser::parse_constant_pool_entries(int length, TRAPS) {
94 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
95 // this function (_current can be allocated in a register, with scalar
96 // replacement of aggregates). The _current pointer is copied back to
97 // stream() when this function returns. DON'T call another method within
98 // this method that uses stream().
99 ClassFileStream* cfs0 = stream();
100 ClassFileStream cfs1 = *cfs0;
101 ClassFileStream* cfs = &cfs1;
102 #ifdef ASSERT
103 assert(cfs->allocated_on_stack(),"should be local");
104 u1* old_current = cfs0->current();
105 #endif
106 Handle class_loader(THREAD, _loader_data->class_loader());
107
108 // Used for batching symbol allocations.
109 const char* names[SymbolTable::symbol_alloc_batch_size];
110 int lengths[SymbolTable::symbol_alloc_batch_size];
111 int indices[SymbolTable::symbol_alloc_batch_size];
112 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
113 int names_count = 0;
114
115 // parsing Index 0 is unused
116 for (int index = 1; index < length; index++) {
117 // Each of the following case guarantees one more byte in the stream
118 // for the following tag or the access_flags following constant pool,
119 // so we don't need bounds-check for reading tag.
120 u1 tag = cfs->get_u1_fast();
121 switch (tag) {
122 case JVM_CONSTANT_Class :
123 {
124 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
125 u2 name_index = cfs->get_u2_fast();
126 _cp->klass_index_at_put(index, name_index);
127 }
128 break;
129 case JVM_CONSTANT_Fieldref :
130 {
131 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
132 u2 class_index = cfs->get_u2_fast();
133 u2 name_and_type_index = cfs->get_u2_fast();
134 _cp->field_at_put(index, class_index, name_and_type_index);
135 }
136 break;
137 case JVM_CONSTANT_Methodref :
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->method_at_put(index, class_index, name_and_type_index);
143 }
144 break;
145 case JVM_CONSTANT_InterfaceMethodref :
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->interface_method_at_put(index, class_index, name_and_type_index);
151 }
152 break;
153 case JVM_CONSTANT_String :
154 {
155 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
156 u2 string_index = cfs->get_u2_fast();
157 _cp->string_index_at_put(index, string_index);
158 }
159 break;
160 case JVM_CONSTANT_MethodHandle :
161 case JVM_CONSTANT_MethodType :
162 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
163 classfile_parse_error(
164 "Class file version does not support constant tag %u in class file %s",
165 tag, CHECK);
166 }
167 if (!EnableInvokeDynamic) {
168 classfile_parse_error(
169 "This JVM does not support constant tag %u in class file %s",
170 tag, CHECK);
171 }
172 if (tag == JVM_CONSTANT_MethodHandle) {
173 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
174 u1 ref_kind = cfs->get_u1_fast();
175 u2 method_index = cfs->get_u2_fast();
176 _cp->method_handle_index_at_put(index, ref_kind, method_index);
177 } else if (tag == JVM_CONSTANT_MethodType) {
178 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
179 u2 signature_index = cfs->get_u2_fast();
180 _cp->method_type_index_at_put(index, signature_index);
181 } else {
182 ShouldNotReachHere();
183 }
184 break;
185 case JVM_CONSTANT_InvokeDynamic :
186 {
187 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
188 classfile_parse_error(
189 "Class file version does not support constant tag %u in class file %s",
190 tag, CHECK);
191 }
192 if (!EnableInvokeDynamic) {
193 classfile_parse_error(
194 "This JVM does not support constant tag %u in class file %s",
195 tag, CHECK);
196 }
197 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
198 u2 bootstrap_specifier_index = cfs->get_u2_fast();
199 u2 name_and_type_index = cfs->get_u2_fast();
200 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index)
201 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
202 _cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
203 }
204 break;
205 case JVM_CONSTANT_Integer :
206 {
207 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
208 u4 bytes = cfs->get_u4_fast();
209 _cp->int_at_put(index, (jint) bytes);
210 }
211 break;
212 case JVM_CONSTANT_Float :
213 {
214 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
215 u4 bytes = cfs->get_u4_fast();
216 _cp->float_at_put(index, *(jfloat*)&bytes);
217 }
218 break;
219 case JVM_CONSTANT_Long :
220 // A mangled type might cause you to overrun allocated memory
221 guarantee_property(index+1 < length,
222 "Invalid constant pool entry %u in class file %s",
223 index, CHECK);
224 {
225 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
226 u8 bytes = cfs->get_u8_fast();
227 _cp->long_at_put(index, bytes);
228 }
229 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
230 break;
231 case JVM_CONSTANT_Double :
232 // A mangled type might cause you to overrun allocated memory
233 guarantee_property(index+1 < length,
234 "Invalid constant pool entry %u in class file %s",
235 index, CHECK);
236 {
237 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
238 u8 bytes = cfs->get_u8_fast();
239 _cp->double_at_put(index, *(jdouble*)&bytes);
240 }
241 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
242 break;
243 case JVM_CONSTANT_NameAndType :
244 {
245 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
246 u2 name_index = cfs->get_u2_fast();
247 u2 signature_index = cfs->get_u2_fast();
248 _cp->name_and_type_at_put(index, name_index, signature_index);
249 }
250 break;
251 case JVM_CONSTANT_Utf8 :
252 {
253 cfs->guarantee_more(2, CHECK); // utf8_length
254 u2 utf8_length = cfs->get_u2_fast();
255 u1* utf8_buffer = cfs->get_u1_buffer();
256 assert(utf8_buffer != NULL, "null utf8 buffer");
257 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
258 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
259 cfs->skip_u1_fast(utf8_length);
260
261 // Before storing the symbol, make sure it's legal
262 if (_need_verify) {
263 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
264 }
265
266 if (EnableInvokeDynamic && has_cp_patch_at(index)) {
267 Handle patch = clear_cp_patch_at(index);
268 guarantee_property(java_lang_String::is_instance(patch()),
269 "Illegal utf8 patch at %d in class file %s",
270 index, CHECK);
271 char* str = java_lang_String::as_utf8_string(patch());
272 // (could use java_lang_String::as_symbol instead, but might as well batch them)
273 utf8_buffer = (u1*) str;
274 utf8_length = (int) strlen(str);
275 }
276
277 unsigned int hash;
278 Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
279 if (result == NULL) {
280 names[names_count] = (char*)utf8_buffer;
281 lengths[names_count] = utf8_length;
282 indices[names_count] = index;
283 hashValues[names_count++] = hash;
284 if (names_count == SymbolTable::symbol_alloc_batch_size) {
285 SymbolTable::new_symbols(_loader_data, _cp, names_count, names, lengths, indices, hashValues, CHECK);
286 names_count = 0;
287 }
288 } else {
289 _cp->symbol_at_put(index, result);
290 }
291 }
292 break;
293 default:
294 classfile_parse_error(
295 "Unknown constant tag %u in class file %s", tag, CHECK);
296 break;
297 }
298 }
299
300 // Allocate the remaining symbols
301 if (names_count > 0) {
302 SymbolTable::new_symbols(_loader_data, _cp, names_count, names, lengths, indices, hashValues, CHECK);
303 }
304
305 // Copy _current pointer of local copy back to stream().
306 #ifdef ASSERT
307 assert(cfs0->current() == old_current, "non-exclusive use of stream()");
308 #endif
309 cfs0->set_current(cfs1.current());
310 }
311
312 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
313
314 inline Symbol* check_symbol_at(constantPoolHandle cp, int index) {
315 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8())
316 return cp->symbol_at(index);
317 else
318 return NULL;
319 }
320
321 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) {
322 ClassFileStream* cfs = stream();
323 constantPoolHandle nullHandle;
324
325 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
326 u2 length = cfs->get_u2_fast();
327 guarantee_property(
328 length >= 1, "Illegal constant pool size %u in class file %s",
329 length, CHECK_(nullHandle));
330 ConstantPool* constant_pool = ConstantPool::allocate(_loader_data, length,
331 CHECK_(nullHandle));
332 _cp = constant_pool; // save in case of errors
333 constantPoolHandle cp (THREAD, constant_pool);
334
335 // parsing constant pool entries
336 parse_constant_pool_entries(length, CHECK_(nullHandle));
337
338 int index = 1; // declared outside of loops for portability
339
340 // first verification pass - validate cross references and fixup class and string constants
341 for (index = 1; index < length; index++) { // Index 0 is unused
342 jbyte tag = cp->tag_at(index).value();
343 switch (tag) {
344 case JVM_CONSTANT_Class :
345 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
346 break;
347 case JVM_CONSTANT_Fieldref :
348 // fall through
349 case JVM_CONSTANT_Methodref :
350 // fall through
351 case JVM_CONSTANT_InterfaceMethodref : {
352 if (!_need_verify) break;
353 int klass_ref_index = cp->klass_ref_index_at(index);
354 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
355 check_property(valid_klass_reference_at(klass_ref_index),
356 "Invalid constant pool index %u in class file %s",
357 klass_ref_index,
358 CHECK_(nullHandle));
359 check_property(valid_cp_range(name_and_type_ref_index, length) &&
360 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
361 "Invalid constant pool index %u in class file %s",
362 name_and_type_ref_index,
363 CHECK_(nullHandle));
364 break;
365 }
366 case JVM_CONSTANT_String :
367 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
368 break;
369 case JVM_CONSTANT_Integer :
370 break;
371 case JVM_CONSTANT_Float :
372 break;
373 case JVM_CONSTANT_Long :
374 case JVM_CONSTANT_Double :
375 index++;
376 check_property(
377 (index < length && cp->tag_at(index).is_invalid()),
378 "Improper constant pool long/double index %u in class file %s",
379 index, CHECK_(nullHandle));
380 break;
381 case JVM_CONSTANT_NameAndType : {
382 if (!_need_verify) break;
383 int name_ref_index = cp->name_ref_index_at(index);
384 int signature_ref_index = cp->signature_ref_index_at(index);
385 check_property(valid_symbol_at(name_ref_index),
386 "Invalid constant pool index %u in class file %s",
387 name_ref_index, CHECK_(nullHandle));
388 check_property(valid_symbol_at(signature_ref_index),
389 "Invalid constant pool index %u in class file %s",
390 signature_ref_index, CHECK_(nullHandle));
391 break;
392 }
393 case JVM_CONSTANT_Utf8 :
394 break;
395 case JVM_CONSTANT_UnresolvedClass : // fall-through
396 case JVM_CONSTANT_UnresolvedClassInError:
397 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
398 break;
399 case JVM_CONSTANT_ClassIndex :
400 {
401 int class_index = cp->klass_index_at(index);
402 check_property(valid_symbol_at(class_index),
403 "Invalid constant pool index %u in class file %s",
404 class_index, CHECK_(nullHandle));
405 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
406 }
407 break;
408 case JVM_CONSTANT_StringIndex :
409 {
410 int string_index = cp->string_index_at(index);
411 check_property(valid_symbol_at(string_index),
412 "Invalid constant pool index %u in class file %s",
413 string_index, CHECK_(nullHandle));
414 Symbol* sym = cp->symbol_at(string_index);
415 cp->unresolved_string_at_put(index, sym);
416 }
417 break;
418 case JVM_CONSTANT_MethodHandle :
419 {
420 int ref_index = cp->method_handle_index_at(index);
421 check_property(
422 valid_cp_range(ref_index, length) &&
423 EnableInvokeDynamic,
424 "Invalid constant pool index %u in class file %s",
425 ref_index, CHECK_(nullHandle));
426 constantTag tag = cp->tag_at(ref_index);
427 int ref_kind = cp->method_handle_ref_kind_at(index);
428 switch (ref_kind) {
429 case JVM_REF_getField:
430 case JVM_REF_getStatic:
431 case JVM_REF_putField:
432 case JVM_REF_putStatic:
433 check_property(
434 tag.is_field(),
435 "Invalid constant pool index %u in class file %s (not a field)",
436 ref_index, CHECK_(nullHandle));
437 break;
438 case JVM_REF_invokeVirtual:
439 case JVM_REF_newInvokeSpecial:
440 check_property(
441 tag.is_method(),
442 "Invalid constant pool index %u in class file %s (not a method)",
443 ref_index, CHECK_(nullHandle));
444 break;
445 case JVM_REF_invokeStatic:
446 case JVM_REF_invokeSpecial:
447 check_property(tag.is_method() ||
448 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
449 "Invalid constant pool index %u in class file %s (not a method)",
450 ref_index, CHECK_(nullHandle));
451 break;
452 case JVM_REF_invokeInterface:
453 check_property(
454 tag.is_interface_method(),
455 "Invalid constant pool index %u in class file %s (not an interface method)",
456 ref_index, CHECK_(nullHandle));
457 break;
458 default:
459 classfile_parse_error(
460 "Bad method handle kind at constant pool index %u in class file %s",
461 index, CHECK_(nullHandle));
462 }
463 // Keep the ref_index unchanged. It will be indirected at link-time.
464 }
465 break;
466 case JVM_CONSTANT_MethodType :
467 {
468 int ref_index = cp->method_type_index_at(index);
469 check_property(valid_symbol_at(ref_index) && EnableInvokeDynamic,
470 "Invalid constant pool index %u in class file %s",
471 ref_index, CHECK_(nullHandle));
472 }
473 break;
474 case JVM_CONSTANT_InvokeDynamic :
475 {
476 int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index);
477 check_property(valid_cp_range(name_and_type_ref_index, length) &&
478 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
479 "Invalid constant pool index %u in class file %s",
480 name_and_type_ref_index,
481 CHECK_(nullHandle));
482 // bootstrap specifier index must be checked later, when BootstrapMethods attr is available
483 break;
484 }
485 default:
486 fatal(err_msg("bad constant pool tag value %u",
487 cp->tag_at(index).value()));
488 ShouldNotReachHere();
489 break;
490 } // end of switch
491 } // end of for
492
493 if (_cp_patches != NULL) {
494 // need to treat this_class specially...
495 assert(EnableInvokeDynamic, "");
496 int this_class_index;
497 {
498 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
499 u1* mark = cfs->current();
500 u2 flags = cfs->get_u2_fast();
501 this_class_index = cfs->get_u2_fast();
502 cfs->set_current(mark); // revert to mark
503 }
504
505 for (index = 1; index < length; index++) { // Index 0 is unused
506 if (has_cp_patch_at(index)) {
507 guarantee_property(index != this_class_index,
508 "Illegal constant pool patch to self at %d in class file %s",
509 index, CHECK_(nullHandle));
510 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
511 }
512 }
513 }
514
515 if (!_need_verify) {
516 return cp;
517 }
518
519 // second verification pass - checks the strings are of the right format.
520 // but not yet to the other entries
521 for (index = 1; index < length; index++) {
522 jbyte tag = cp->tag_at(index).value();
523 switch (tag) {
524 case JVM_CONSTANT_UnresolvedClass: {
525 Symbol* class_name = cp->unresolved_klass_at(index);
526 // check the name, even if _cp_patches will overwrite it
527 verify_legal_class_name(class_name, CHECK_(nullHandle));
528 break;
529 }
530 case JVM_CONSTANT_NameAndType: {
531 if (_need_verify && _major_version >= JAVA_7_VERSION) {
532 int sig_index = cp->signature_ref_index_at(index);
533 int name_index = cp->name_ref_index_at(index);
534 Symbol* name = cp->symbol_at(name_index);
535 Symbol* sig = cp->symbol_at(sig_index);
536 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
537 verify_legal_method_signature(name, sig, CHECK_(nullHandle));
538 } else {
539 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
540 }
541 }
542 break;
543 }
544 case JVM_CONSTANT_InvokeDynamic:
545 case JVM_CONSTANT_Fieldref:
546 case JVM_CONSTANT_Methodref:
547 case JVM_CONSTANT_InterfaceMethodref: {
548 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
549 // already verified to be utf8
550 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
551 // already verified to be utf8
552 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
553 Symbol* name = cp->symbol_at(name_ref_index);
554 Symbol* signature = cp->symbol_at(signature_ref_index);
555 if (tag == JVM_CONSTANT_Fieldref) {
556 verify_legal_field_name(name, CHECK_(nullHandle));
557 if (_need_verify && _major_version >= JAVA_7_VERSION) {
558 // Signature is verified above, when iterating NameAndType_info.
559 // Need only to be sure it's the right type.
560 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
561 throwIllegalSignature(
562 "Field", name, signature, CHECK_(nullHandle));
563 }
564 } else {
565 verify_legal_field_signature(name, signature, CHECK_(nullHandle));
566 }
567 } else {
568 verify_legal_method_name(name, CHECK_(nullHandle));
569 if (_need_verify && _major_version >= JAVA_7_VERSION) {
570 // Signature is verified above, when iterating NameAndType_info.
571 // Need only to be sure it's the right type.
572 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
573 throwIllegalSignature(
574 "Method", name, signature, CHECK_(nullHandle));
575 }
576 } else {
577 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
578 }
579 if (tag == JVM_CONSTANT_Methodref) {
580 // 4509014: If a class method name begins with '<', it must be "<init>".
581 assert(name != NULL, "method name in constant pool is null");
582 unsigned int name_len = name->utf8_length();
583 assert(name_len > 0, "bad method name"); // already verified as legal name
584 if (name->byte_at(0) == '<') {
585 if (name != vmSymbols::object_initializer_name()) {
586 classfile_parse_error(
587 "Bad method name at constant pool index %u in class file %s",
588 name_ref_index, CHECK_(nullHandle));
589 }
590 }
591 }
592 }
593 break;
594 }
595 case JVM_CONSTANT_MethodHandle: {
596 int ref_index = cp->method_handle_index_at(index);
597 int ref_kind = cp->method_handle_ref_kind_at(index);
598 switch (ref_kind) {
599 case JVM_REF_invokeVirtual:
600 case JVM_REF_invokeStatic:
601 case JVM_REF_invokeSpecial:
602 case JVM_REF_newInvokeSpecial:
603 {
604 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index);
605 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
606 Symbol* name = cp->symbol_at(name_ref_index);
607 if (ref_kind == JVM_REF_newInvokeSpecial) {
608 if (name != vmSymbols::object_initializer_name()) {
609 classfile_parse_error(
610 "Bad constructor name at constant pool index %u in class file %s",
611 name_ref_index, CHECK_(nullHandle));
612 }
613 } else {
614 if (name == vmSymbols::object_initializer_name()) {
615 classfile_parse_error(
616 "Bad method name at constant pool index %u in class file %s",
617 name_ref_index, CHECK_(nullHandle));
618 }
619 }
620 }
621 break;
622 // Other ref_kinds are already fully checked in previous pass.
623 }
624 break;
625 }
626 case JVM_CONSTANT_MethodType: {
627 Symbol* no_name = vmSymbols::type_name(); // place holder
628 Symbol* signature = cp->method_type_signature_at(index);
629 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
630 break;
631 }
632 case JVM_CONSTANT_Utf8: {
633 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
634 }
635 } // end of switch
636 } // end of for
637
638 return cp;
639 }
640
641
642 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) {
643 assert(EnableInvokeDynamic, "");
644 BasicType patch_type = T_VOID;
645
646 switch (cp->tag_at(index).value()) {
647
648 case JVM_CONSTANT_UnresolvedClass :
649 // Patching a class means pre-resolving it.
650 // The name in the constant pool is ignored.
651 if (java_lang_Class::is_instance(patch())) {
652 guarantee_property(!java_lang_Class::is_primitive(patch()),
653 "Illegal class patch at %d in class file %s",
654 index, CHECK);
655 cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
656 } else {
657 guarantee_property(java_lang_String::is_instance(patch()),
658 "Illegal class patch at %d in class file %s",
659 index, CHECK);
660 Symbol* name = java_lang_String::as_symbol(patch(), CHECK);
661 cp->unresolved_klass_at_put(index, name);
662 }
663 break;
664
665 case JVM_CONSTANT_String :
666 // skip this patch and don't clear it. Needs the oop array for resolved
667 // references to be created first.
668 return;
669
670 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim;
671 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim;
672 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim;
673 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim;
674 patch_prim:
675 {
676 jvalue value;
677 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
678 guarantee_property(value_type == patch_type,
679 "Illegal primitive patch at %d in class file %s",
680 index, CHECK);
681 switch (value_type) {
682 case T_INT: cp->int_at_put(index, value.i); break;
683 case T_FLOAT: cp->float_at_put(index, value.f); break;
684 case T_LONG: cp->long_at_put(index, value.j); break;
685 case T_DOUBLE: cp->double_at_put(index, value.d); break;
686 default: assert(false, "");
687 }
688 }
689 break;
690
691 default:
692 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
693 guarantee_property(!has_cp_patch_at(index),
694 "Illegal unexpected patch at %d in class file %s",
695 index, CHECK);
696 return;
697 }
698
699 // On fall-through, mark the patch as used.
700 clear_cp_patch_at(index);
701 }
702
703
704
705 class NameSigHash: public ResourceObj {
706 public:
707 Symbol* _name; // name
708 Symbol* _sig; // signature
709 NameSigHash* _next; // Next entry in hash table
710 };
711
712
713 #define HASH_ROW_SIZE 256
714
715 unsigned int hash(Symbol* name, Symbol* sig) {
716 unsigned int raw_hash = 0;
717 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
718 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
719
720 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
721 }
722
723
724 void initialize_hashtable(NameSigHash** table) {
725 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
726 }
727
728 // Return false if the name/sig combination is found in table.
729 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
730 // The old format checker uses heap sort to find duplicates.
731 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
732 // of table since we don't expect Symbol*'s to move.
733 bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) {
734 assert(name != NULL, "name in constant pool is NULL");
735
736 // First lookup for duplicates
737 int index = hash(name, sig);
738 NameSigHash* entry = table[index];
739 while (entry != NULL) {
740 if (entry->_name == name && entry->_sig == sig) {
741 return false;
742 }
743 entry = entry->_next;
744 }
745
746 // No duplicate is found, allocate a new entry and fill it.
747 entry = new NameSigHash();
748 entry->_name = name;
749 entry->_sig = sig;
750
751 // Insert into hash table
752 entry->_next = table[index];
753 table[index] = entry;
754
755 return true;
756 }
757
758
759 Array<Klass*>* ClassFileParser::parse_interfaces(int length,
760 Handle protection_domain,
761 Symbol* class_name,
762 bool* has_default_methods,
763 TRAPS) {
764 if (length == 0) {
765 _local_interfaces = Universe::the_empty_klass_array();
766 } else {
767 ClassFileStream* cfs = stream();
768 assert(length > 0, "only called for length>0");
769 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, length, NULL, CHECK_NULL);
770
771 int index;
772 for (index = 0; index < length; index++) {
773 u2 interface_index = cfs->get_u2(CHECK_NULL);
774 KlassHandle interf;
775 check_property(
776 valid_klass_reference_at(interface_index),
777 "Interface name has bad constant pool index %u in class file %s",
778 interface_index, CHECK_NULL);
779 if (_cp->tag_at(interface_index).is_klass()) {
780 interf = KlassHandle(THREAD, _cp->resolved_klass_at(interface_index));
781 } else {
782 Symbol* unresolved_klass = _cp->klass_name_at(interface_index);
783
784 // Don't need to check legal name because it's checked when parsing constant pool.
785 // But need to make sure it's not an array type.
786 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
787 "Bad interface name in class file %s", CHECK_NULL);
788 Handle class_loader(THREAD, _loader_data->class_loader());
789
790 // Call resolve_super so classcircularity is checked
791 Klass* k = SystemDictionary::resolve_super_or_fail(class_name,
792 unresolved_klass, class_loader, protection_domain,
793 false, CHECK_NULL);
794 interf = KlassHandle(THREAD, k);
795 }
796
797 if (!interf()->is_interface()) {
798 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", NULL);
799 }
800 if (InstanceKlass::cast(interf())->has_default_methods()) {
801 *has_default_methods = true;
802 }
803 _local_interfaces->at_put(index, interf());
804 }
805
806 if (!_need_verify || length <= 1) {
807 return _local_interfaces;
808 }
809
810 // Check if there's any duplicates in interfaces
811 ResourceMark rm(THREAD);
812 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
813 THREAD, NameSigHash*, HASH_ROW_SIZE);
814 initialize_hashtable(interface_names);
815 bool dup = false;
816 {
817 debug_only(No_Safepoint_Verifier nsv;)
818 for (index = 0; index < length; index++) {
819 Klass* k = _local_interfaces->at(index);
820 Symbol* name = InstanceKlass::cast(k)->name();
821 // If no duplicates, add (name, NULL) in hashtable interface_names.
822 if (!put_after_lookup(name, NULL, interface_names)) {
823 dup = true;
824 break;
825 }
826 }
827 }
828 if (dup) {
829 classfile_parse_error("Duplicate interface name in class file %s", CHECK_NULL);
830 }
831 }
832 return _local_interfaces;
833 }
834
835
836 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, TRAPS) {
837 // Make sure the constant pool entry is of a type appropriate to this field
838 guarantee_property(
839 (constantvalue_index > 0 &&
840 constantvalue_index < _cp->length()),
841 "Bad initial value index %u in ConstantValue attribute in class file %s",
842 constantvalue_index, CHECK);
843 constantTag value_type = _cp->tag_at(constantvalue_index);
844 switch ( _cp->basic_type_for_signature_at(signature_index) ) {
845 case T_LONG:
846 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
847 break;
848 case T_FLOAT:
849 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
850 break;
851 case T_DOUBLE:
852 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
853 break;
854 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
855 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
856 break;
857 case T_OBJECT:
858 guarantee_property((_cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
859 && value_type.is_string()),
860 "Bad string initial value in class file %s", CHECK);
861 break;
862 default:
863 classfile_parse_error(
864 "Unable to set initial value %u in class file %s",
865 constantvalue_index, CHECK);
866 }
867 }
868
869
870 // Parse attributes for a field.
871 void ClassFileParser::parse_field_attributes(u2 attributes_count,
872 bool is_static, u2 signature_index,
873 u2* constantvalue_index_addr,
874 bool* is_synthetic_addr,
875 u2* generic_signature_index_addr,
876 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
877 TRAPS) {
878 ClassFileStream* cfs = stream();
879 assert(attributes_count > 0, "length should be greater than 0");
880 u2 constantvalue_index = 0;
881 u2 generic_signature_index = 0;
882 bool is_synthetic = false;
883 u1* runtime_visible_annotations = NULL;
884 int runtime_visible_annotations_length = 0;
885 u1* runtime_invisible_annotations = NULL;
886 int runtime_invisible_annotations_length = 0;
887 u1* runtime_visible_type_annotations = NULL;
888 int runtime_visible_type_annotations_length = 0;
889 u1* runtime_invisible_type_annotations = NULL;
890 int runtime_invisible_type_annotations_length = 0;
891 bool runtime_invisible_type_annotations_exists = false;
892 while (attributes_count--) {
893 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
894 u2 attribute_name_index = cfs->get_u2_fast();
895 u4 attribute_length = cfs->get_u4_fast();
896 check_property(valid_symbol_at(attribute_name_index),
897 "Invalid field attribute index %u in class file %s",
898 attribute_name_index,
899 CHECK);
900 Symbol* attribute_name = _cp->symbol_at(attribute_name_index);
901 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
902 // ignore if non-static
903 if (constantvalue_index != 0) {
904 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
905 }
906 check_property(
907 attribute_length == 2,
908 "Invalid ConstantValue field attribute length %u in class file %s",
909 attribute_length, CHECK);
910 constantvalue_index = cfs->get_u2(CHECK);
911 if (_need_verify) {
912 verify_constantvalue(constantvalue_index, signature_index, CHECK);
913 }
914 } else if (attribute_name == vmSymbols::tag_synthetic()) {
915 if (attribute_length != 0) {
916 classfile_parse_error(
917 "Invalid Synthetic field attribute length %u in class file %s",
918 attribute_length, CHECK);
919 }
920 is_synthetic = true;
921 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
922 if (attribute_length != 0) {
923 classfile_parse_error(
924 "Invalid Deprecated field attribute length %u in class file %s",
925 attribute_length, CHECK);
926 }
927 } else if (_major_version >= JAVA_1_5_VERSION) {
928 if (attribute_name == vmSymbols::tag_signature()) {
929 if (attribute_length != 2) {
930 classfile_parse_error(
931 "Wrong size %u for field's Signature attribute in class file %s",
932 attribute_length, CHECK);
933 }
934 generic_signature_index = cfs->get_u2(CHECK);
935 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
936 runtime_visible_annotations_length = attribute_length;
937 runtime_visible_annotations = cfs->get_u1_buffer();
938 assert(runtime_visible_annotations != NULL, "null visible annotations");
939 parse_annotations(runtime_visible_annotations,
940 runtime_visible_annotations_length,
941 parsed_annotations,
942 CHECK);
943 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
944 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
945 runtime_invisible_annotations_length = attribute_length;
946 runtime_invisible_annotations = cfs->get_u1_buffer();
947 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
948 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
949 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
950 if (runtime_visible_type_annotations != NULL) {
951 classfile_parse_error(
952 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
953 }
954 runtime_visible_type_annotations_length = attribute_length;
955 runtime_visible_type_annotations = cfs->get_u1_buffer();
956 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
957 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
958 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
959 if (runtime_invisible_type_annotations_exists) {
960 classfile_parse_error(
961 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
962 } else {
963 runtime_invisible_type_annotations_exists = true;
964 }
965 if (PreserveAllAnnotations) {
966 runtime_invisible_type_annotations_length = attribute_length;
967 runtime_invisible_type_annotations = cfs->get_u1_buffer();
968 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
969 }
970 cfs->skip_u1(attribute_length, CHECK);
971 } else {
972 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
973 }
974 } else {
975 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
976 }
977 }
978
979 *constantvalue_index_addr = constantvalue_index;
980 *is_synthetic_addr = is_synthetic;
981 *generic_signature_index_addr = generic_signature_index;
982 AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
983 runtime_visible_annotations_length,
984 runtime_invisible_annotations,
985 runtime_invisible_annotations_length,
986 CHECK);
987 parsed_annotations->set_field_annotations(a);
988 a = assemble_annotations(runtime_visible_type_annotations,
989 runtime_visible_type_annotations_length,
990 runtime_invisible_type_annotations,
991 runtime_invisible_type_annotations_length,
992 CHECK);
993 parsed_annotations->set_field_type_annotations(a);
994 return;
995 }
996
997
998 // Field allocation types. Used for computing field offsets.
999
1000 enum FieldAllocationType {
1001 STATIC_OOP, // Oops
1002 STATIC_BYTE, // Boolean, Byte, char
1003 STATIC_SHORT, // shorts
1004 STATIC_WORD, // ints
1005 STATIC_DOUBLE, // aligned long or double
1006 NONSTATIC_OOP,
1007 NONSTATIC_BYTE,
1008 NONSTATIC_SHORT,
1009 NONSTATIC_WORD,
1010 NONSTATIC_DOUBLE,
1011 MAX_FIELD_ALLOCATION_TYPE,
1012 BAD_ALLOCATION_TYPE = -1
1013 };
1014
1015 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1016 BAD_ALLOCATION_TYPE, // 0
1017 BAD_ALLOCATION_TYPE, // 1
1018 BAD_ALLOCATION_TYPE, // 2
1019 BAD_ALLOCATION_TYPE, // 3
1020 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1021 NONSTATIC_SHORT, // T_CHAR = 5,
1022 NONSTATIC_WORD, // T_FLOAT = 6,
1023 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1024 NONSTATIC_BYTE, // T_BYTE = 8,
1025 NONSTATIC_SHORT, // T_SHORT = 9,
1026 NONSTATIC_WORD, // T_INT = 10,
1027 NONSTATIC_DOUBLE, // T_LONG = 11,
1028 NONSTATIC_OOP, // T_OBJECT = 12,
1029 NONSTATIC_OOP, // T_ARRAY = 13,
1030 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1031 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1032 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1033 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1034 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1035 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1036 BAD_ALLOCATION_TYPE, // 0
1037 BAD_ALLOCATION_TYPE, // 1
1038 BAD_ALLOCATION_TYPE, // 2
1039 BAD_ALLOCATION_TYPE, // 3
1040 STATIC_BYTE , // T_BOOLEAN = 4,
1041 STATIC_SHORT, // T_CHAR = 5,
1042 STATIC_WORD, // T_FLOAT = 6,
1043 STATIC_DOUBLE, // T_DOUBLE = 7,
1044 STATIC_BYTE, // T_BYTE = 8,
1045 STATIC_SHORT, // T_SHORT = 9,
1046 STATIC_WORD, // T_INT = 10,
1047 STATIC_DOUBLE, // T_LONG = 11,
1048 STATIC_OOP, // T_OBJECT = 12,
1049 STATIC_OOP, // T_ARRAY = 13,
1050 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1051 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1052 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
1053 BAD_ALLOCATION_TYPE, // T_METADATA = 17,
1054 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1055 BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
1056 };
1057
1058 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1059 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1060 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1061 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1062 return result;
1063 }
1064
1065 class FieldAllocationCount: public ResourceObj {
1066 public:
1067 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1068
1069 FieldAllocationCount() {
1070 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1071 count[i] = 0;
1072 }
1073 }
1074
1075 FieldAllocationType update(bool is_static, BasicType type) {
1076 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1077 // Make sure there is no overflow with injected fields.
1078 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1079 count[atype]++;
1080 return atype;
1081 }
1082 };
1083
1084 Array<u2>* ClassFileParser::parse_fields(Symbol* class_name,
1085 bool is_interface,
1086 FieldAllocationCount *fac,
1087 u2* java_fields_count_ptr, TRAPS) {
1088 ClassFileStream* cfs = stream();
1089 cfs->guarantee_more(2, CHECK_NULL); // length
1090 u2 length = cfs->get_u2_fast();
1091 *java_fields_count_ptr = length;
1092
1093 int num_injected = 0;
1094 InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected);
1095 int total_fields = length + num_injected;
1096
1097 // The field array starts with tuples of shorts
1098 // [access, name index, sig index, initial value index, byte offset].
1099 // A generic signature slot only exists for field with generic
1100 // signature attribute. And the access flag is set with
1101 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1102 // signature slots are at the end of the field array and after all
1103 // other fields data.
1104 //
1105 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1106 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1107 // ...
1108 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1109 // [generic signature index]
1110 // [generic signature index]
1111 // ...
1112 //
1113 // Allocate a temporary resource array for field data. For each field,
1114 // a slot is reserved in the temporary array for the generic signature
1115 // index. After parsing all fields, the data are copied to a permanent
1116 // array and any unused slots will be discarded.
1117 ResourceMark rm(THREAD);
1118 u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD(
1119 THREAD, u2, total_fields * (FieldInfo::field_slots + 1));
1120
1121 // The generic signature slots start after all other fields' data.
1122 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1123 int num_generic_signature = 0;
1124 for (int n = 0; n < length; n++) {
1125 cfs->guarantee_more(8, CHECK_NULL); // access_flags, name_index, descriptor_index, attributes_count
1126
1127 AccessFlags access_flags;
1128 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1129 verify_legal_field_modifiers(flags, is_interface, CHECK_NULL);
1130 access_flags.set_flags(flags);
1131
1132 u2 name_index = cfs->get_u2_fast();
1133 int cp_size = _cp->length();
1134 check_property(valid_symbol_at(name_index),
1135 "Invalid constant pool index %u for field name in class file %s",
1136 name_index,
1137 CHECK_NULL);
1138 Symbol* name = _cp->symbol_at(name_index);
1139 verify_legal_field_name(name, CHECK_NULL);
1140
1141 u2 signature_index = cfs->get_u2_fast();
1142 check_property(valid_symbol_at(signature_index),
1143 "Invalid constant pool index %u for field signature in class file %s",
1144 signature_index, CHECK_NULL);
1145 Symbol* sig = _cp->symbol_at(signature_index);
1146 verify_legal_field_signature(name, sig, CHECK_NULL);
1147
1148 u2 constantvalue_index = 0;
1149 bool is_synthetic = false;
1150 u2 generic_signature_index = 0;
1151 bool is_static = access_flags.is_static();
1152 FieldAnnotationCollector parsed_annotations(_loader_data);
1153
1154 u2 attributes_count = cfs->get_u2_fast();
1155 if (attributes_count > 0) {
1156 parse_field_attributes(attributes_count, is_static, signature_index,
1157 &constantvalue_index, &is_synthetic,
1158 &generic_signature_index, &parsed_annotations,
1159 CHECK_NULL);
1160 if (parsed_annotations.field_annotations() != NULL) {
1161 if (_fields_annotations == NULL) {
1162 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1163 _loader_data, length, NULL,
1164 CHECK_NULL);
1165 }
1166 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1167 parsed_annotations.set_field_annotations(NULL);
1168 }
1169 if (parsed_annotations.field_type_annotations() != NULL) {
1170 if (_fields_type_annotations == NULL) {
1171 _fields_type_annotations = MetadataFactory::new_array<AnnotationArray*>(
1172 _loader_data, length, NULL,
1173 CHECK_NULL);
1174 }
1175 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1176 parsed_annotations.set_field_type_annotations(NULL);
1177 }
1178
1179 if (is_synthetic) {
1180 access_flags.set_is_synthetic();
1181 }
1182 if (generic_signature_index != 0) {
1183 access_flags.set_field_has_generic_signature();
1184 fa[generic_signature_slot] = generic_signature_index;
1185 generic_signature_slot ++;
1186 num_generic_signature ++;
1187 }
1188 }
1189
1190 FieldInfo* field = FieldInfo::from_field_array(fa, n);
1191 field->initialize(access_flags.as_short(),
1192 name_index,
1193 signature_index,
1194 constantvalue_index);
1195 BasicType type = _cp->basic_type_for_signature_at(signature_index);
1196
1197 // Remember how many oops we encountered and compute allocation type
1198 FieldAllocationType atype = fac->update(is_static, type);
1199 field->set_allocation_type(atype);
1200
1201 // After field is initialized with type, we can augment it with aux info
1202 if (parsed_annotations.has_any_annotations())
1203 parsed_annotations.apply_to(field);
1204 }
1205
1206 int index = length;
1207 if (num_injected != 0) {
1208 for (int n = 0; n < num_injected; n++) {
1209 // Check for duplicates
1210 if (injected[n].may_be_java) {
1211 Symbol* name = injected[n].name();
1212 Symbol* signature = injected[n].signature();
1213 bool duplicate = false;
1214 for (int i = 0; i < length; i++) {
1215 FieldInfo* f = FieldInfo::from_field_array(fa, i);
1216 if (name == _cp->symbol_at(f->name_index()) &&
1217 signature == _cp->symbol_at(f->signature_index())) {
1218 // Symbol is desclared in Java so skip this one
1219 duplicate = true;
1220 break;
1221 }
1222 }
1223 if (duplicate) {
1224 // These will be removed from the field array at the end
1225 continue;
1226 }
1227 }
1228
1229 // Injected field
1230 FieldInfo* field = FieldInfo::from_field_array(fa, index);
1231 field->initialize(JVM_ACC_FIELD_INTERNAL,
1232 injected[n].name_index,
1233 injected[n].signature_index,
1234 0);
1235
1236 BasicType type = FieldType::basic_type(injected[n].signature());
1237
1238 // Remember how many oops we encountered and compute allocation type
1239 FieldAllocationType atype = fac->update(false, type);
1240 field->set_allocation_type(atype);
1241 index++;
1242 }
1243 }
1244
1245 // Now copy the fields' data from the temporary resource array.
1246 // Sometimes injected fields already exist in the Java source so
1247 // the fields array could be too long. In that case the
1248 // fields array is trimed. Also unused slots that were reserved
1249 // for generic signature indexes are discarded.
1250 Array<u2>* fields = MetadataFactory::new_array<u2>(
1251 _loader_data, index * FieldInfo::field_slots + num_generic_signature,
1252 CHECK_NULL);
1253 _fields = fields; // save in case of error
1254 {
1255 int i = 0;
1256 for (; i < index * FieldInfo::field_slots; i++) {
1257 fields->at_put(i, fa[i]);
1258 }
1259 for (int j = total_fields * FieldInfo::field_slots;
1260 j < generic_signature_slot; j++) {
1261 fields->at_put(i++, fa[j]);
1262 }
1263 assert(i == fields->length(), "");
1264 }
1265
1266 if (_need_verify && length > 1) {
1267 // Check duplicated fields
1268 ResourceMark rm(THREAD);
1269 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1270 THREAD, NameSigHash*, HASH_ROW_SIZE);
1271 initialize_hashtable(names_and_sigs);
1272 bool dup = false;
1273 {
1274 debug_only(No_Safepoint_Verifier nsv;)
1275 for (AllFieldStream fs(fields, _cp); !fs.done(); fs.next()) {
1276 Symbol* name = fs.name();
1277 Symbol* sig = fs.signature();
1278 // If no duplicates, add name/signature in hashtable names_and_sigs.
1279 if (!put_after_lookup(name, sig, names_and_sigs)) {
1280 dup = true;
1281 break;
1282 }
1283 }
1284 }
1285 if (dup) {
1286 classfile_parse_error("Duplicate field name&signature in class file %s",
1287 CHECK_NULL);
1288 }
1289 }
1290
1291 return fields;
1292 }
1293
1294
1295 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1296 while (length-- > 0) {
1297 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1298 }
1299 }
1300
1301
1302 u2* ClassFileParser::parse_exception_table(u4 code_length,
1303 u4 exception_table_length,
1304 TRAPS) {
1305 ClassFileStream* cfs = stream();
1306
1307 u2* exception_table_start = cfs->get_u2_buffer();
1308 assert(exception_table_start != NULL, "null exception table");
1309 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, end_pc, handler_pc, catch_type_index
1310 // Will check legal target after parsing code array in verifier.
1311 if (_need_verify) {
1312 for (unsigned int i = 0; i < exception_table_length; i++) {
1313 u2 start_pc = cfs->get_u2_fast();
1314 u2 end_pc = cfs->get_u2_fast();
1315 u2 handler_pc = cfs->get_u2_fast();
1316 u2 catch_type_index = cfs->get_u2_fast();
1317 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1318 "Illegal exception table range in class file %s",
1319 CHECK_NULL);
1320 guarantee_property(handler_pc < code_length,
1321 "Illegal exception table handler in class file %s",
1322 CHECK_NULL);
1323 if (catch_type_index != 0) {
1324 guarantee_property(valid_klass_reference_at(catch_type_index),
1325 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1326 }
1327 }
1328 } else {
1329 cfs->skip_u2_fast(exception_table_length * 4);
1330 }
1331 return exception_table_start;
1332 }
1333
1334 void ClassFileParser::parse_linenumber_table(
1335 u4 code_attribute_length, u4 code_length,
1336 CompressedLineNumberWriteStream** write_stream, TRAPS) {
1337 ClassFileStream* cfs = stream();
1338 unsigned int num_entries = cfs->get_u2(CHECK);
1339
1340 // Each entry is a u2 start_pc, and a u2 line_number
1341 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1342
1343 // Verify line number attribute and table length
1344 check_property(
1345 code_attribute_length == sizeof(u2) + length_in_bytes,
1346 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1347
1348 cfs->guarantee_more(length_in_bytes, CHECK);
1349
1350 if ((*write_stream) == NULL) {
1351 if (length_in_bytes > fixed_buffer_size) {
1352 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1353 } else {
1354 (*write_stream) = new CompressedLineNumberWriteStream(
1355 linenumbertable_buffer, fixed_buffer_size);
1356 }
1357 }
1358
1359 while (num_entries-- > 0) {
1360 u2 bci = cfs->get_u2_fast(); // start_pc
1361 u2 line = cfs->get_u2_fast(); // line_number
1362 guarantee_property(bci < code_length,
1363 "Invalid pc in LineNumberTable in class file %s", CHECK);
1364 (*write_stream)->write_pair(bci, line);
1365 }
1366 }
1367
1368
1369 // Class file LocalVariableTable elements.
1370 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1371 public:
1372 u2 start_bci;
1373 u2 length;
1374 u2 name_cp_index;
1375 u2 descriptor_cp_index;
1376 u2 slot;
1377 };
1378
1379
1380 class LVT_Hash: public CHeapObj<mtClass> {
1381 public:
1382 LocalVariableTableElement *_elem; // element
1383 LVT_Hash* _next; // Next entry in hash table
1384 };
1385
1386 unsigned int hash(LocalVariableTableElement *elem) {
1387 unsigned int raw_hash = elem->start_bci;
1388
1389 raw_hash = elem->length + raw_hash * 37;
1390 raw_hash = elem->name_cp_index + raw_hash * 37;
1391 raw_hash = elem->slot + raw_hash * 37;
1392
1393 return raw_hash % HASH_ROW_SIZE;
1394 }
1395
1396 void initialize_hashtable(LVT_Hash** table) {
1397 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1398 table[i] = NULL;
1399 }
1400 }
1401
1402 void clear_hashtable(LVT_Hash** table) {
1403 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1404 LVT_Hash* current = table[i];
1405 LVT_Hash* next;
1406 while (current != NULL) {
1407 next = current->_next;
1408 current->_next = NULL;
1409 delete(current);
1410 current = next;
1411 }
1412 table[i] = NULL;
1413 }
1414 }
1415
1416 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
1417 LVT_Hash* entry = table[index];
1418
1419 /*
1420 * 3-tuple start_bci/length/slot has to be unique key,
1421 * so the following comparison seems to be redundant:
1422 * && elem->name_cp_index == entry->_elem->name_cp_index
1423 */
1424 while (entry != NULL) {
1425 if (elem->start_bci == entry->_elem->start_bci
1426 && elem->length == entry->_elem->length
1427 && elem->name_cp_index == entry->_elem->name_cp_index
1428 && elem->slot == entry->_elem->slot
1429 ) {
1430 return entry;
1431 }
1432 entry = entry->_next;
1433 }
1434 return NULL;
1435 }
1436
1437 // Return false if the local variable is found in table.
1438 // Return true if no duplicate is found.
1439 // And local variable is added as a new entry in table.
1440 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
1441 // First lookup for duplicates
1442 int index = hash(elem);
1443 LVT_Hash* entry = LVT_lookup(elem, index, table);
1444
1445 if (entry != NULL) {
1446 return false;
1447 }
1448 // No duplicate is found, allocate a new entry and fill it.
1449 if ((entry = new LVT_Hash()) == NULL) {
1450 return false;
1451 }
1452 entry->_elem = elem;
1453
1454 // Insert into hash table
1455 entry->_next = table[index];
1456 table[index] = entry;
1457
1458 return true;
1459 }
1460
1461 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1462 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1463 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1464 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1465 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1466 lvt->signature_cp_index = 0;
1467 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1468 }
1469
1470 // Function is used to parse both attributes:
1471 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1472 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1473 u2 max_locals,
1474 u4 code_attribute_length,
1475 u2* localvariable_table_length,
1476 bool isLVTT,
1477 TRAPS) {
1478 ClassFileStream* cfs = stream();
1479 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1480 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1481 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1482 // Verify local variable table attribute has right length
1483 if (_need_verify) {
1484 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1485 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1486 }
1487 u2* localvariable_table_start = cfs->get_u2_buffer();
1488 assert(localvariable_table_start != NULL, "null local variable table");
1489 if (!_need_verify) {
1490 cfs->skip_u2_fast(size);
1491 } else {
1492 cfs->guarantee_more(size * 2, CHECK_NULL);
1493 for(int i = 0; i < (*localvariable_table_length); i++) {
1494 u2 start_pc = cfs->get_u2_fast();
1495 u2 length = cfs->get_u2_fast();
1496 u2 name_index = cfs->get_u2_fast();
1497 u2 descriptor_index = cfs->get_u2_fast();
1498 u2 index = cfs->get_u2_fast();
1499 // Assign to a u4 to avoid overflow
1500 u4 end_pc = (u4)start_pc + (u4)length;
1501
1502 if (start_pc >= code_length) {
1503 classfile_parse_error(
1504 "Invalid start_pc %u in %s in class file %s",
1505 start_pc, tbl_name, CHECK_NULL);
1506 }
1507 if (end_pc > code_length) {
1508 classfile_parse_error(
1509 "Invalid length %u in %s in class file %s",
1510 length, tbl_name, CHECK_NULL);
1511 }
1512 int cp_size = _cp->length();
1513 guarantee_property(valid_symbol_at(name_index),
1514 "Name index %u in %s has bad constant type in class file %s",
1515 name_index, tbl_name, CHECK_NULL);
1516 guarantee_property(valid_symbol_at(descriptor_index),
1517 "Signature index %u in %s has bad constant type in class file %s",
1518 descriptor_index, tbl_name, CHECK_NULL);
1519
1520 Symbol* name = _cp->symbol_at(name_index);
1521 Symbol* sig = _cp->symbol_at(descriptor_index);
1522 verify_legal_field_name(name, CHECK_NULL);
1523 u2 extra_slot = 0;
1524 if (!isLVTT) {
1525 verify_legal_field_signature(name, sig, CHECK_NULL);
1526
1527 // 4894874: check special cases for double and long local variables
1528 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1529 sig == vmSymbols::type_signature(T_LONG)) {
1530 extra_slot = 1;
1531 }
1532 }
1533 guarantee_property((index + extra_slot) < max_locals,
1534 "Invalid index %u in %s in class file %s",
1535 index, tbl_name, CHECK_NULL);
1536 }
1537 }
1538 return localvariable_table_start;
1539 }
1540
1541
1542 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1543 u1* u1_array, u2* u2_array, TRAPS) {
1544 ClassFileStream* cfs = stream();
1545 u2 index = 0; // index in the array with long/double occupying two slots
1546 u4 i1 = *u1_index;
1547 u4 i2 = *u2_index + 1;
1548 for(int i = 0; i < array_length; i++) {
1549 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1550 index++;
1551 if (tag == ITEM_Long || tag == ITEM_Double) {
1552 index++;
1553 } else if (tag == ITEM_Object) {
1554 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1555 guarantee_property(valid_klass_reference_at(class_index),
1556 "Bad class index %u in StackMap in class file %s",
1557 class_index, CHECK);
1558 } else if (tag == ITEM_Uninitialized) {
1559 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1560 guarantee_property(
1561 offset < code_length,
1562 "Bad uninitialized type offset %u in StackMap in class file %s",
1563 offset, CHECK);
1564 } else {
1565 guarantee_property(
1566 tag <= (u1)ITEM_Uninitialized,
1567 "Unknown variable type %u in StackMap in class file %s",
1568 tag, CHECK);
1569 }
1570 }
1571 u2_array[*u2_index] = index;
1572 *u1_index = i1;
1573 *u2_index = i2;
1574 }
1575
1576 u1* ClassFileParser::parse_stackmap_table(
1577 u4 code_attribute_length, TRAPS) {
1578 if (code_attribute_length == 0)
1579 return NULL;
1580
1581 ClassFileStream* cfs = stream();
1582 u1* stackmap_table_start = cfs->get_u1_buffer();
1583 assert(stackmap_table_start != NULL, "null stackmap table");
1584
1585 // check code_attribute_length first
1586 stream()->skip_u1(code_attribute_length, CHECK_NULL);
1587
1588 if (!_need_verify && !DumpSharedSpaces) {
1589 return NULL;
1590 }
1591 return stackmap_table_start;
1592 }
1593
1594 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1595 u4 method_attribute_length,
1596 TRAPS) {
1597 ClassFileStream* cfs = stream();
1598 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1599 *checked_exceptions_length = cfs->get_u2_fast();
1600 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1601 u2* checked_exceptions_start = cfs->get_u2_buffer();
1602 assert(checked_exceptions_start != NULL, "null checked exceptions");
1603 if (!_need_verify) {
1604 cfs->skip_u2_fast(size);
1605 } else {
1606 // Verify each value in the checked exception table
1607 u2 checked_exception;
1608 u2 len = *checked_exceptions_length;
1609 cfs->guarantee_more(2 * len, CHECK_NULL);
1610 for (int i = 0; i < len; i++) {
1611 checked_exception = cfs->get_u2_fast();
1612 check_property(
1613 valid_klass_reference_at(checked_exception),
1614 "Exception name has bad type at constant pool %u in class file %s",
1615 checked_exception, CHECK_NULL);
1616 }
1617 }
1618 // check exceptions attribute length
1619 if (_need_verify) {
1620 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1621 sizeof(u2) * size),
1622 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1623 }
1624 return checked_exceptions_start;
1625 }
1626
1627 void ClassFileParser::throwIllegalSignature(
1628 const char* type, Symbol* name, Symbol* sig, TRAPS) {
1629 ResourceMark rm(THREAD);
1630 Exceptions::fthrow(THREAD_AND_LOCATION,
1631 vmSymbols::java_lang_ClassFormatError(),
1632 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1633 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1634 }
1635
1636 // Skip an annotation. Return >=limit if there is any problem.
1637 int ClassFileParser::skip_annotation(u1* buffer, int limit, int index) {
1638 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1639 // value := switch (tag:u1) { ... }
1640 index += 2; // skip atype
1641 if ((index += 2) >= limit) return limit; // read nmem
1642 int nmem = Bytes::get_Java_u2(buffer+index-2);
1643 while (--nmem >= 0 && index < limit) {
1644 index += 2; // skip member
1645 index = skip_annotation_value(buffer, limit, index);
1646 }
1647 return index;
1648 }
1649
1650 // Skip an annotation value. Return >=limit if there is any problem.
1651 int ClassFileParser::skip_annotation_value(u1* buffer, int limit, int index) {
1652 // value := switch (tag:u1) {
1653 // case B, C, I, S, Z, D, F, J, c: con:u2;
1654 // case e: e_class:u2 e_name:u2;
1655 // case s: s_con:u2;
1656 // case [: do(nval:u2) {value};
1657 // case @: annotation;
1658 // case s: s_con:u2;
1659 // }
1660 if ((index += 1) >= limit) return limit; // read tag
1661 u1 tag = buffer[index-1];
1662 switch (tag) {
1663 case 'B': case 'C': case 'I': case 'S': case 'Z':
1664 case 'D': case 'F': case 'J': case 'c': case 's':
1665 index += 2; // skip con or s_con
1666 break;
1667 case 'e':
1668 index += 4; // skip e_class, e_name
1669 break;
1670 case '[':
1671 {
1672 if ((index += 2) >= limit) return limit; // read nval
1673 int nval = Bytes::get_Java_u2(buffer+index-2);
1674 while (--nval >= 0 && index < limit) {
1675 index = skip_annotation_value(buffer, limit, index);
1676 }
1677 }
1678 break;
1679 case '@':
1680 index = skip_annotation(buffer, limit, index);
1681 break;
1682 default:
1683 assert(false, "annotation tag");
1684 return limit; // bad tag byte
1685 }
1686 return index;
1687 }
1688
1689 // Sift through annotations, looking for those significant to the VM:
1690 void ClassFileParser::parse_annotations(u1* buffer, int limit,
1691 ClassFileParser::AnnotationCollector* coll,
1692 TRAPS) {
1693 // annotations := do(nann:u2) {annotation}
1694 int index = 0;
1695 if ((index += 2) >= limit) return; // read nann
1696 int nann = Bytes::get_Java_u2(buffer+index-2);
1697 enum { // initial annotation layout
1698 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1699 count_off = 2, // u2 such as 1 (one value)
1700 member_off = 4, // utf8 such as 'value'
1701 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1702 e_tag_val = 'e',
1703 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1704 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1705 e_size = 11, // end of 'e' annotation
1706 c_tag_val = 'c', // payload is type
1707 c_con_off = 7, // utf8 payload, such as 'I'
1708 c_size = 9, // end of 'c' annotation
1709 s_tag_val = 's', // payload is String
1710 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
1711 s_size = 9,
1712 min_size = 6 // smallest possible size (zero members)
1713 };
1714 while ((--nann) >= 0 && (index-2 + min_size <= limit)) {
1715 int index0 = index;
1716 index = skip_annotation(buffer, limit, index);
1717 u1* abase = buffer + index0;
1718 int atype = Bytes::get_Java_u2(abase + atype_off);
1719 int count = Bytes::get_Java_u2(abase + count_off);
1720 Symbol* aname = check_symbol_at(_cp, atype);
1721 if (aname == NULL) break; // invalid annotation name
1722 Symbol* member = NULL;
1723 if (count >= 1) {
1724 int member_index = Bytes::get_Java_u2(abase + member_off);
1725 member = check_symbol_at(_cp, member_index);
1726 if (member == NULL) break; // invalid member name
1727 }
1728
1729 // Here is where parsing particular annotations will take place.
1730 AnnotationCollector::ID id = coll->annotation_index(_loader_data, aname);
1731 if (id == AnnotationCollector::_unknown) continue;
1732 coll->set_annotation(id);
1733
1734 if (id == AnnotationCollector::_sun_misc_Contended) {
1735 // @Contended can optionally specify the contention group.
1736 //
1737 // Contended group defines the equivalence class over the fields:
1738 // the fields within the same contended group are not treated distinct.
1739 // The only exception is default group, which does not incur the
1740 // equivalence. Naturally, contention group for classes is meaningless.
1741 //
1742 // While the contention group is specified as String, annotation
1743 // values are already interned, and we might as well use the constant
1744 // pool index as the group tag.
1745 //
1746 u2 group_index = 0; // default contended group
1747 if (count == 1
1748 && s_size == (index - index0) // match size
1749 && s_tag_val == *(abase + tag_off)
1750 && member == vmSymbols::value_name()) {
1751 group_index = Bytes::get_Java_u2(abase + s_con_off);
1752 if (_cp->symbol_at(group_index)->utf8_length() == 0) {
1753 group_index = 0; // default contended group
1754 }
1755 }
1756 coll->set_contended_group(group_index);
1757 }
1758 }
1759 }
1760
1761 ClassFileParser::AnnotationCollector::ID
1762 ClassFileParser::AnnotationCollector::annotation_index(ClassLoaderData* loader_data,
1763 Symbol* name) {
1764 vmSymbols::SID sid = vmSymbols::find_sid(name);
1765 // Privileged code can use all annotations. Other code silently drops some.
1766 const bool privileged = loader_data->is_the_null_class_loader_data() ||
1767 loader_data->is_ext_class_loader_data() ||
1768 loader_data->is_anonymous();
1769 switch (sid) {
1770 case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_reflect_CallerSensitive_signature):
1771 if (_location != _in_method) break; // only allow for methods
1772 if (!privileged) break; // only allow in privileged code
1773 return _method_CallerSensitive;
1774 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_ForceInline_signature):
1775 if (_location != _in_method) break; // only allow for methods
1776 if (!privileged) break; // only allow in privileged code
1777 return _method_ForceInline;
1778 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_DontInline_signature):
1779 if (_location != _in_method) break; // only allow for methods
1780 if (!privileged) break; // only allow in privileged code
1781 return _method_DontInline;
1782 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature):
1783 if (_location != _in_method) break; // only allow for methods
1784 if (!privileged) break; // only allow in privileged code
1785 return _method_LambdaForm_Compiled;
1786 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature):
1787 if (_location != _in_method) break; // only allow for methods
1788 if (!privileged) break; // only allow in privileged code
1789 return _method_LambdaForm_Hidden;
1790 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_Stable_signature):
1791 if (_location != _in_field) break; // only allow for fields
1792 if (!privileged) break; // only allow in privileged code
1793 return _field_Stable;
1794 case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_misc_Contended_signature):
1795 if (_location != _in_field && _location != _in_class) break; // only allow for fields and classes
1796 if (!EnableContended || (RestrictContended && !privileged)) break; // honor privileges
1797 return _sun_misc_Contended;
1798 default: break;
1799 }
1800 return AnnotationCollector::_unknown;
1801 }
1802
1803 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1804 if (is_contended())
1805 f->set_contended_group(contended_group());
1806 if (is_stable())
1807 f->set_stable(true);
1808 }
1809
1810 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
1811 // If there's an error deallocate metadata for field annotations
1812 MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
1813 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
1814 }
1815
1816 void ClassFileParser::MethodAnnotationCollector::apply_to(methodHandle m) {
1817 if (has_annotation(_method_CallerSensitive))
1818 m->set_caller_sensitive(true);
1819 if (has_annotation(_method_ForceInline))
1820 m->set_force_inline(true);
1821 if (has_annotation(_method_DontInline))
1822 m->set_dont_inline(true);
1823 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
1824 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
1825 if (has_annotation(_method_LambdaForm_Hidden))
1826 m->set_hidden(true);
1827 }
1828
1829 void ClassFileParser::ClassAnnotationCollector::apply_to(instanceKlassHandle k) {
1830 k->set_is_contended(is_contended());
1831 }
1832
1833
1834 #define MAX_ARGS_SIZE 255
1835 #define MAX_CODE_SIZE 65535
1836 #define INITIAL_MAX_LVT_NUMBER 256
1837
1838 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
1839 *
1840 * Rules for LVT's and LVTT's are:
1841 * - There can be any number of LVT's and LVTT's.
1842 * - If there are n LVT's, it is the same as if there was just
1843 * one LVT containing all the entries from the n LVT's.
1844 * - There may be no more than one LVT entry per local variable.
1845 * Two LVT entries are 'equal' if these fields are the same:
1846 * start_pc, length, name, slot
1847 * - There may be no more than one LVTT entry per each LVT entry.
1848 * Each LVTT entry has to match some LVT entry.
1849 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
1850 */
1851 void ClassFileParser::copy_localvariable_table(ConstMethod* cm,
1852 int lvt_cnt,
1853 u2* localvariable_table_length,
1854 u2** localvariable_table_start,
1855 int lvtt_cnt,
1856 u2* localvariable_type_table_length,
1857 u2** localvariable_type_table_start,
1858 TRAPS) {
1859
1860 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
1861 initialize_hashtable(lvt_Hash);
1862
1863 // To fill LocalVariableTable in
1864 Classfile_LVT_Element* cf_lvt;
1865 LocalVariableTableElement* lvt = cm->localvariable_table_start();
1866
1867 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
1868 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
1869 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
1870 copy_lvt_element(&cf_lvt[idx], lvt);
1871 // If no duplicates, add LVT elem in hashtable lvt_Hash.
1872 if (LVT_put_after_lookup(lvt, lvt_Hash) == false
1873 && _need_verify
1874 && _major_version >= JAVA_1_5_VERSION) {
1875 clear_hashtable(lvt_Hash);
1876 classfile_parse_error("Duplicated LocalVariableTable attribute "
1877 "entry for '%s' in class file %s",
1878 _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
1879 CHECK);
1880 }
1881 }
1882 }
1883
1884 // To merge LocalVariableTable and LocalVariableTypeTable
1885 Classfile_LVT_Element* cf_lvtt;
1886 LocalVariableTableElement lvtt_elem;
1887
1888 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
1889 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
1890 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
1891 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
1892 int index = hash(&lvtt_elem);
1893 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
1894 if (entry == NULL) {
1895 if (_need_verify) {
1896 clear_hashtable(lvt_Hash);
1897 classfile_parse_error("LVTT entry for '%s' in class file %s "
1898 "does not match any LVT entry",
1899 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
1900 CHECK);
1901 }
1902 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
1903 clear_hashtable(lvt_Hash);
1904 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
1905 "entry for '%s' in class file %s",
1906 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
1907 CHECK);
1908 } else {
1909 // to add generic signatures into LocalVariableTable
1910 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
1911 }
1912 }
1913 }
1914 clear_hashtable(lvt_Hash);
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 }
2022 } else {
2023 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
2024 }
2025
2026 int args_size = -1; // only used when _need_verify is true
2027 if (_need_verify) {
2028 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2029 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
2030 if (args_size > MAX_ARGS_SIZE) {
2031 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
2032 }
2033 }
2034
2035 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2036
2037 // Default values for code and exceptions attribute elements
2038 u2 max_stack = 0;
2039 u2 max_locals = 0;
2040 u4 code_length = 0;
2041 u1* code_start = 0;
2042 u2 exception_table_length = 0;
2043 u2* exception_table_start = NULL;
2044 Array<int>* exception_handlers = Universe::the_empty_int_array();
2045 u2 checked_exceptions_length = 0;
2046 u2* checked_exceptions_start = NULL;
2047 CompressedLineNumberWriteStream* linenumber_table = NULL;
2048 int linenumber_table_length = 0;
2049 int total_lvt_length = 0;
2050 u2 lvt_cnt = 0;
2051 u2 lvtt_cnt = 0;
2052 bool lvt_allocated = false;
2053 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2054 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2055 u2* localvariable_table_length;
2056 u2** localvariable_table_start;
2057 u2* localvariable_type_table_length;
2058 u2** localvariable_type_table_start;
2059 u2 method_parameters_length = 0;
2060 u1* method_parameters_data = NULL;
2061 bool method_parameters_seen = false;
2062 bool parsed_code_attribute = false;
2063 bool parsed_checked_exceptions_attribute = false;
2064 bool parsed_stackmap_attribute = false;
2065 // stackmap attribute - JDK1.5
2066 u1* stackmap_data = NULL;
2067 int stackmap_data_length = 0;
2068 u2 generic_signature_index = 0;
2069 MethodAnnotationCollector parsed_annotations;
2070 u1* runtime_visible_annotations = NULL;
2071 int runtime_visible_annotations_length = 0;
2072 u1* runtime_invisible_annotations = NULL;
2073 int runtime_invisible_annotations_length = 0;
2074 u1* runtime_visible_parameter_annotations = NULL;
2075 int runtime_visible_parameter_annotations_length = 0;
2076 u1* runtime_invisible_parameter_annotations = NULL;
2077 int runtime_invisible_parameter_annotations_length = 0;
2078 u1* runtime_visible_type_annotations = NULL;
2079 int runtime_visible_type_annotations_length = 0;
2080 u1* runtime_invisible_type_annotations = NULL;
2081 int runtime_invisible_type_annotations_length = 0;
2082 bool runtime_invisible_type_annotations_exists = false;
2083 u1* annotation_default = NULL;
2084 int annotation_default_length = 0;
2085
2086 // Parse code and exceptions attribute
2087 u2 method_attributes_count = cfs->get_u2_fast();
2088 while (method_attributes_count--) {
2089 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
2090 u2 method_attribute_name_index = cfs->get_u2_fast();
2091 u4 method_attribute_length = cfs->get_u4_fast();
2092 check_property(
2093 valid_symbol_at(method_attribute_name_index),
2094 "Invalid method attribute name index %u in class file %s",
2095 method_attribute_name_index, CHECK_(nullHandle));
2096
2097 Symbol* method_attribute_name = _cp->symbol_at(method_attribute_name_index);
2098 if (method_attribute_name == vmSymbols::tag_code()) {
2099 // Parse Code attribute
2100 if (_need_verify) {
2101 guarantee_property(
2102 !access_flags.is_native() && !access_flags.is_abstract(),
2103 "Code attribute in native or abstract methods in class file %s",
2104 CHECK_(nullHandle));
2105 }
2106 if (parsed_code_attribute) {
2107 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
2108 }
2109 parsed_code_attribute = true;
2110
2111 // Stack size, locals size, and code size
2112 if (_major_version == 45 && _minor_version <= 2) {
2113 cfs->guarantee_more(4, CHECK_(nullHandle));
2114 max_stack = cfs->get_u1_fast();
2115 max_locals = cfs->get_u1_fast();
2116 code_length = cfs->get_u2_fast();
2117 } else {
2118 cfs->guarantee_more(8, CHECK_(nullHandle));
2119 max_stack = cfs->get_u2_fast();
2120 max_locals = cfs->get_u2_fast();
2121 code_length = cfs->get_u4_fast();
2122 }
2123 if (_need_verify) {
2124 guarantee_property(args_size <= max_locals,
2125 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
2126 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2127 "Invalid method Code length %u in class file %s",
2128 code_length, CHECK_(nullHandle));
2129 }
2130 // Code pointer
2131 code_start = cfs->get_u1_buffer();
2132 assert(code_start != NULL, "null code start");
2133 cfs->guarantee_more(code_length, CHECK_(nullHandle));
2134 cfs->skip_u1_fast(code_length);
2135
2136 // Exception handler table
2137 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
2138 exception_table_length = cfs->get_u2_fast();
2139 if (exception_table_length > 0) {
2140 exception_table_start =
2141 parse_exception_table(code_length, exception_table_length, CHECK_(nullHandle));
2142 }
2143
2144 // Parse additional attributes in code attribute
2145 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
2146 u2 code_attributes_count = cfs->get_u2_fast();
2147
2148 unsigned int calculated_attribute_length = 0;
2149
2150 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2151 calculated_attribute_length =
2152 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2153 } else {
2154 // max_stack, locals and length are smaller in pre-version 45.2 classes
2155 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2156 }
2157 calculated_attribute_length +=
2158 code_length +
2159 sizeof(exception_table_length) +
2160 sizeof(code_attributes_count) +
2161 exception_table_length *
2162 ( sizeof(u2) + // start_pc
2163 sizeof(u2) + // end_pc
2164 sizeof(u2) + // handler_pc
2165 sizeof(u2) ); // catch_type_index
2166
2167 while (code_attributes_count--) {
2168 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
2169 u2 code_attribute_name_index = cfs->get_u2_fast();
2170 u4 code_attribute_length = cfs->get_u4_fast();
2171 calculated_attribute_length += code_attribute_length +
2172 sizeof(code_attribute_name_index) +
2173 sizeof(code_attribute_length);
2174 check_property(valid_symbol_at(code_attribute_name_index),
2175 "Invalid code attribute name index %u in class file %s",
2176 code_attribute_name_index,
2177 CHECK_(nullHandle));
2178 if (LoadLineNumberTables &&
2179 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2180 // Parse and compress line number table
2181 parse_linenumber_table(code_attribute_length, code_length,
2182 &linenumber_table, CHECK_(nullHandle));
2183
2184 } else if (LoadLocalVariableTables &&
2185 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2186 // Parse local variable table
2187 if (!lvt_allocated) {
2188 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2189 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2190 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2191 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2192 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2193 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2194 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2195 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2196 lvt_allocated = true;
2197 }
2198 if (lvt_cnt == max_lvt_cnt) {
2199 max_lvt_cnt <<= 1;
2200 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2201 localvariable_table_start = REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2202 }
2203 localvariable_table_start[lvt_cnt] =
2204 parse_localvariable_table(code_length,
2205 max_locals,
2206 code_attribute_length,
2207 &localvariable_table_length[lvt_cnt],
2208 false, // is not LVTT
2209 CHECK_(nullHandle));
2210 total_lvt_length += localvariable_table_length[lvt_cnt];
2211 lvt_cnt++;
2212 } else if (LoadLocalVariableTypeTables &&
2213 _major_version >= JAVA_1_5_VERSION &&
2214 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2215 if (!lvt_allocated) {
2216 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2217 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2218 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2219 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2220 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2221 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2222 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2223 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2224 lvt_allocated = true;
2225 }
2226 // Parse local variable type table
2227 if (lvtt_cnt == max_lvtt_cnt) {
2228 max_lvtt_cnt <<= 1;
2229 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2230 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2231 }
2232 localvariable_type_table_start[lvtt_cnt] =
2233 parse_localvariable_table(code_length,
2234 max_locals,
2235 code_attribute_length,
2236 &localvariable_type_table_length[lvtt_cnt],
2237 true, // is LVTT
2238 CHECK_(nullHandle));
2239 lvtt_cnt++;
2240 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2241 _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2242 // Stack map is only needed by the new verifier in JDK1.5.
2243 if (parsed_stackmap_attribute) {
2244 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
2245 }
2246 stackmap_data = parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
2247 stackmap_data_length = code_attribute_length;
2248 parsed_stackmap_attribute = true;
2249 } else {
2250 // Skip unknown attributes
2251 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
2252 }
2253 }
2254 // check method attribute length
2255 if (_need_verify) {
2256 guarantee_property(method_attribute_length == calculated_attribute_length,
2257 "Code segment has wrong length in class file %s", CHECK_(nullHandle));
2258 }
2259 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2260 // Parse Exceptions attribute
2261 if (parsed_checked_exceptions_attribute) {
2262 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
2263 }
2264 parsed_checked_exceptions_attribute = true;
2265 checked_exceptions_start =
2266 parse_checked_exceptions(&checked_exceptions_length,
2267 method_attribute_length,
2268 CHECK_(nullHandle));
2269 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2270 // reject multiple method parameters
2271 if (method_parameters_seen) {
2272 classfile_parse_error("Multiple MethodParameters attributes in class file %s", CHECK_(nullHandle));
2273 }
2274 method_parameters_seen = true;
2275 method_parameters_length = cfs->get_u1_fast();
2276 if (method_attribute_length != (method_parameters_length * 4u) + 1u) {
2277 classfile_parse_error(
2278 "Invalid MethodParameters method attribute length %u in class file",
2279 method_attribute_length, CHECK_(nullHandle));
2280 }
2281 method_parameters_data = cfs->get_u1_buffer();
2282 cfs->skip_u2_fast(method_parameters_length);
2283 cfs->skip_u2_fast(method_parameters_length);
2284 // ignore this attribute if it cannot be reflected
2285 if (!SystemDictionary::Parameter_klass_loaded())
2286 method_parameters_length = 0;
2287 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2288 if (method_attribute_length != 0) {
2289 classfile_parse_error(
2290 "Invalid Synthetic method attribute length %u in class file %s",
2291 method_attribute_length, CHECK_(nullHandle));
2292 }
2293 // Should we check that there hasn't already been a synthetic attribute?
2294 access_flags.set_is_synthetic();
2295 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2296 if (method_attribute_length != 0) {
2297 classfile_parse_error(
2298 "Invalid Deprecated method attribute length %u in class file %s",
2299 method_attribute_length, CHECK_(nullHandle));
2300 }
2301 } else if (_major_version >= JAVA_1_5_VERSION) {
2302 if (method_attribute_name == vmSymbols::tag_signature()) {
2303 if (method_attribute_length != 2) {
2304 classfile_parse_error(
2305 "Invalid Signature attribute length %u in class file %s",
2306 method_attribute_length, CHECK_(nullHandle));
2307 }
2308 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index
2309 generic_signature_index = cfs->get_u2_fast();
2310 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2311 runtime_visible_annotations_length = method_attribute_length;
2312 runtime_visible_annotations = cfs->get_u1_buffer();
2313 assert(runtime_visible_annotations != NULL, "null visible annotations");
2314 parse_annotations(runtime_visible_annotations,
2315 runtime_visible_annotations_length, &parsed_annotations,
2316 CHECK_(nullHandle));
2317 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
2318 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2319 runtime_invisible_annotations_length = method_attribute_length;
2320 runtime_invisible_annotations = cfs->get_u1_buffer();
2321 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2322 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
2323 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2324 runtime_visible_parameter_annotations_length = method_attribute_length;
2325 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2326 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2327 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
2328 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2329 runtime_invisible_parameter_annotations_length = method_attribute_length;
2330 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2331 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
2332 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
2333 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2334 annotation_default_length = method_attribute_length;
2335 annotation_default = cfs->get_u1_buffer();
2336 assert(annotation_default != NULL, "null annotation default");
2337 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
2338 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2339 if (runtime_visible_type_annotations != NULL) {
2340 classfile_parse_error(
2341 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2342 CHECK_(nullHandle));
2343 }
2344 runtime_visible_type_annotations_length = method_attribute_length;
2345 runtime_visible_type_annotations = cfs->get_u1_buffer();
2346 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2347 // No need for the VM to parse Type annotations
2348 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_(nullHandle));
2349 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2350 if (runtime_invisible_type_annotations_exists) {
2351 classfile_parse_error(
2352 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2353 CHECK_(nullHandle));
2354 } else {
2355 runtime_invisible_type_annotations_exists = true;
2356 }
2357 if (PreserveAllAnnotations) {
2358 runtime_invisible_type_annotations_length = method_attribute_length;
2359 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2360 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2361 }
2362 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2363 } else {
2364 // Skip unknown attributes
2365 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2366 }
2367 } else {
2368 // Skip unknown attributes
2369 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2370 }
2371 }
2372
2373 if (linenumber_table != NULL) {
2374 linenumber_table->write_terminator();
2375 linenumber_table_length = linenumber_table->position();
2376 }
2377
2378 // Make sure there's at least one Code attribute in non-native/non-abstract method
2379 if (_need_verify) {
2380 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
2381 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
2382 }
2383
2384 // All sizing information for a Method* is finally available, now create it
2385 InlineTableSizes sizes(
2386 total_lvt_length,
2387 linenumber_table_length,
2388 exception_table_length,
2389 checked_exceptions_length,
2390 method_parameters_length,
2391 generic_signature_index,
2392 runtime_visible_annotations_length +
2393 runtime_invisible_annotations_length,
2394 runtime_visible_parameter_annotations_length +
2395 runtime_invisible_parameter_annotations_length,
2396 runtime_visible_type_annotations_length +
2397 runtime_invisible_type_annotations_length,
2398 annotation_default_length,
2399 0);
2400
2401 Method* m = Method::allocate(
2402 _loader_data, code_length, access_flags, &sizes,
2403 ConstMethod::NORMAL, CHECK_(nullHandle));
2404
2405 ClassLoadingService::add_class_method_size(m->size()*HeapWordSize);
2406
2407 // Fill in information from fixed part (access_flags already set)
2408 m->set_constants(_cp);
2409 m->set_name_index(name_index);
2410 m->set_signature_index(signature_index);
2411 #ifdef CC_INTERP
2412 // hmm is there a gc issue here??
2413 ResultTypeFinder rtf(_cp->symbol_at(signature_index));
2414 m->set_result_index(rtf.type());
2415 #endif
2416
2417 if (args_size >= 0) {
2418 m->set_size_of_parameters(args_size);
2419 } else {
2420 m->compute_size_of_parameters(THREAD);
2421 }
2422 #ifdef ASSERT
2423 if (args_size >= 0) {
2424 m->compute_size_of_parameters(THREAD);
2425 assert(args_size == m->size_of_parameters(), "");
2426 }
2427 #endif
2428
2429 // Fill in code attribute information
2430 m->set_max_stack(max_stack);
2431 m->set_max_locals(max_locals);
2432 if (stackmap_data != NULL) {
2433 m->constMethod()->copy_stackmap_data(_loader_data, stackmap_data,
2434 stackmap_data_length, CHECK_NULL);
2435 }
2436
2437 // Copy byte codes
2438 m->set_code(code_start);
2439
2440 // Copy line number table
2441 if (linenumber_table != NULL) {
2442 memcpy(m->compressed_linenumber_table(),
2443 linenumber_table->buffer(), linenumber_table_length);
2444 }
2445
2446 // Copy exception table
2447 if (exception_table_length > 0) {
2448 int size =
2449 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2450 copy_u2_with_conversion((u2*) m->exception_table_start(),
2451 exception_table_start, size);
2452 }
2453
2454 // Copy method parameters
2455 if (method_parameters_length > 0) {
2456 MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2457 for (int i = 0; i < method_parameters_length; i++) {
2458 elem[i].name_cp_index = Bytes::get_Java_u2(method_parameters_data);
2459 method_parameters_data += 2;
2460 elem[i].flags = Bytes::get_Java_u2(method_parameters_data);
2461 method_parameters_data += 2;
2462 }
2463 }
2464
2465 // Copy checked exceptions
2466 if (checked_exceptions_length > 0) {
2467 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2468 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
2469 }
2470
2471 // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2472 if (total_lvt_length > 0) {
2473 promoted_flags->set_has_localvariable_table();
2474 copy_localvariable_table(m->constMethod(), lvt_cnt,
2475 localvariable_table_length,
2476 localvariable_table_start,
2477 lvtt_cnt,
2478 localvariable_type_table_length,
2479 localvariable_type_table_start, CHECK_NULL);
2480 }
2481
2482 if (parsed_annotations.has_any_annotations())
2483 parsed_annotations.apply_to(m);
2484
2485 // Copy annotations
2486 copy_method_annotations(m->constMethod(),
2487 runtime_visible_annotations,
2488 runtime_visible_annotations_length,
2489 runtime_invisible_annotations,
2490 runtime_invisible_annotations_length,
2491 runtime_visible_parameter_annotations,
2492 runtime_visible_parameter_annotations_length,
2493 runtime_invisible_parameter_annotations,
2494 runtime_invisible_parameter_annotations_length,
2495 runtime_visible_type_annotations,
2496 runtime_visible_type_annotations_length,
2497 runtime_invisible_type_annotations,
2498 runtime_invisible_type_annotations_length,
2499 annotation_default,
2500 annotation_default_length,
2501 CHECK_NULL);
2502
2503 if (name == vmSymbols::finalize_method_name() &&
2504 signature == vmSymbols::void_method_signature()) {
2505 if (m->is_empty_method()) {
2506 _has_empty_finalizer = true;
2507 } else {
2508 _has_finalizer = true;
2509 }
2510 }
2511 if (name == vmSymbols::object_initializer_name() &&
2512 signature == vmSymbols::void_method_signature() &&
2513 m->is_vanilla_constructor()) {
2514 _has_vanilla_constructor = true;
2515 }
2516
2517 NOT_PRODUCT(m->verify());
2518 return m;
2519 }
2520
2521
2522 // The promoted_flags parameter is used to pass relevant access_flags
2523 // from the methods back up to the containing klass. These flag values
2524 // are added to klass's access_flags.
2525
2526 Array<Method*>* ClassFileParser::parse_methods(bool is_interface,
2527 AccessFlags* promoted_flags,
2528 bool* has_final_method,
2529 bool* has_default_methods,
2530 TRAPS) {
2531 ClassFileStream* cfs = stream();
2532 cfs->guarantee_more(2, CHECK_NULL); // length
2533 u2 length = cfs->get_u2_fast();
2534 if (length == 0) {
2535 _methods = Universe::the_empty_method_array();
2536 } else {
2537 _methods = MetadataFactory::new_array<Method*>(_loader_data, length, NULL, CHECK_NULL);
2538
2539 HandleMark hm(THREAD);
2540 for (int index = 0; index < length; index++) {
2541 methodHandle method = parse_method(is_interface,
2542 promoted_flags,
2543 CHECK_NULL);
2544
2545 if (method->is_final()) {
2546 *has_final_method = true;
2547 }
2548 if (is_interface && !(*has_default_methods)
2549 && !method->is_abstract() && !method->is_static()
2550 && !method->is_private()) {
2551 // default method
2552 *has_default_methods = true;
2553 }
2554 _methods->at_put(index, method());
2555 }
2556
2557 if (_need_verify && length > 1) {
2558 // Check duplicated methods
2559 ResourceMark rm(THREAD);
2560 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2561 THREAD, NameSigHash*, HASH_ROW_SIZE);
2562 initialize_hashtable(names_and_sigs);
2563 bool dup = false;
2564 {
2565 debug_only(No_Safepoint_Verifier nsv;)
2566 for (int i = 0; i < length; i++) {
2567 Method* m = _methods->at(i);
2568 // If no duplicates, add name/signature in hashtable names_and_sigs.
2569 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2570 dup = true;
2571 break;
2572 }
2573 }
2574 }
2575 if (dup) {
2576 classfile_parse_error("Duplicate method name&signature in class file %s",
2577 CHECK_NULL);
2578 }
2579 }
2580 }
2581 return _methods;
2582 }
2583
2584
2585 intArray* ClassFileParser::sort_methods(Array<Method*>* methods) {
2586 int length = methods->length();
2587 // If JVMTI original method ordering or sharing is enabled we have to
2588 // remember the original class file ordering.
2589 // We temporarily use the vtable_index field in the Method* to store the
2590 // class file index, so we can read in after calling qsort.
2591 // Put the method ordering in the shared archive.
2592 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2593 for (int index = 0; index < length; index++) {
2594 Method* m = methods->at(index);
2595 assert(!m->valid_vtable_index(), "vtable index should not be set");
2596 m->set_vtable_index(index);
2597 }
2598 }
2599 // Sort method array by ascending method name (for faster lookups & vtable construction)
2600 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2601 Method::sort_methods(methods);
2602
2603 intArray* method_ordering = NULL;
2604 // If JVMTI original method ordering or sharing is enabled construct int
2605 // array remembering the original ordering
2606 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2607 method_ordering = new intArray(length);
2608 for (int index = 0; index < length; index++) {
2609 Method* m = methods->at(index);
2610 int old_index = m->vtable_index();
2611 assert(old_index >= 0 && old_index < length, "invalid method index");
2612 method_ordering->at_put(index, old_index);
2613 m->set_vtable_index(Method::invalid_vtable_index);
2614 }
2615 }
2616 return method_ordering;
2617 }
2618
2619
2620 void ClassFileParser::parse_classfile_sourcefile_attribute(TRAPS) {
2621 ClassFileStream* cfs = stream();
2622 cfs->guarantee_more(2, CHECK); // sourcefile_index
2623 u2 sourcefile_index = cfs->get_u2_fast();
2624 check_property(
2625 valid_symbol_at(sourcefile_index),
2626 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2627 sourcefile_index, CHECK);
2628 set_class_sourcefile_index(sourcefile_index);
2629 }
2630
2631
2632
2633 void ClassFileParser::parse_classfile_source_debug_extension_attribute(int length, TRAPS) {
2634 ClassFileStream* cfs = stream();
2635 u1* sde_buffer = cfs->get_u1_buffer();
2636 assert(sde_buffer != NULL, "null sde buffer");
2637
2638 // Don't bother storing it if there is no way to retrieve it
2639 if (JvmtiExport::can_get_source_debug_extension()) {
2640 assert((length+1) > length, "Overflow checking");
2641 u1* sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2642 for (int i = 0; i < length; i++) {
2643 sde[i] = sde_buffer[i];
2644 }
2645 sde[length] = '\0';
2646 set_class_sde_buffer((char*)sde, length);
2647 }
2648 // Got utf8 string, set stream position forward
2649 cfs->skip_u1(length, CHECK);
2650 }
2651
2652
2653 // Inner classes can be static, private or protected (classic VM does this)
2654 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2655
2656 // Return number of classes in the inner classes attribute table
2657 u2 ClassFileParser::parse_classfile_inner_classes_attribute(u1* inner_classes_attribute_start,
2658 bool parsed_enclosingmethod_attribute,
2659 u2 enclosing_method_class_index,
2660 u2 enclosing_method_method_index,
2661 TRAPS) {
2662 ClassFileStream* cfs = stream();
2663 u1* current_mark = cfs->current();
2664 u2 length = 0;
2665 if (inner_classes_attribute_start != NULL) {
2666 cfs->set_current(inner_classes_attribute_start);
2667 cfs->guarantee_more(2, CHECK_0); // length
2668 length = cfs->get_u2_fast();
2669 }
2670
2671 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2672 // method data:
2673 // [inner_class_info_index,
2674 // outer_class_info_index,
2675 // inner_name_index,
2676 // inner_class_access_flags,
2677 // ...
2678 // enclosing_method_class_index,
2679 // enclosing_method_method_index]
2680 int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2681 Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
2682 _inner_classes = inner_classes;
2683
2684 int index = 0;
2685 int cp_size = _cp->length();
2686 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2687 for (int n = 0; n < length; n++) {
2688 // Inner class index
2689 u2 inner_class_info_index = cfs->get_u2_fast();
2690 check_property(
2691 inner_class_info_index == 0 ||
2692 valid_klass_reference_at(inner_class_info_index),
2693 "inner_class_info_index %u has bad constant type in class file %s",
2694 inner_class_info_index, CHECK_0);
2695 // Outer class index
2696 u2 outer_class_info_index = cfs->get_u2_fast();
2697 check_property(
2698 outer_class_info_index == 0 ||
2699 valid_klass_reference_at(outer_class_info_index),
2700 "outer_class_info_index %u has bad constant type in class file %s",
2701 outer_class_info_index, CHECK_0);
2702 // Inner class name
2703 u2 inner_name_index = cfs->get_u2_fast();
2704 check_property(
2705 inner_name_index == 0 || valid_symbol_at(inner_name_index),
2706 "inner_name_index %u has bad constant type in class file %s",
2707 inner_name_index, CHECK_0);
2708 if (_need_verify) {
2709 guarantee_property(inner_class_info_index != outer_class_info_index,
2710 "Class is both outer and inner class in class file %s", CHECK_0);
2711 }
2712 // Access flags
2713 AccessFlags inner_access_flags;
2714 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2715 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2716 // Set abstract bit for old class files for backward compatibility
2717 flags |= JVM_ACC_ABSTRACT;
2718 }
2719 verify_legal_class_modifiers(flags, CHECK_0);
2720 inner_access_flags.set_flags(flags);
2721
2722 inner_classes->at_put(index++, inner_class_info_index);
2723 inner_classes->at_put(index++, outer_class_info_index);
2724 inner_classes->at_put(index++, inner_name_index);
2725 inner_classes->at_put(index++, inner_access_flags.as_short());
2726 }
2727
2728 // 4347400: make sure there's no duplicate entry in the classes array
2729 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2730 for(int i = 0; i < length * 4; i += 4) {
2731 for(int j = i + 4; j < length * 4; j += 4) {
2732 guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
2733 inner_classes->at(i+1) != inner_classes->at(j+1) ||
2734 inner_classes->at(i+2) != inner_classes->at(j+2) ||
2735 inner_classes->at(i+3) != inner_classes->at(j+3)),
2736 "Duplicate entry in InnerClasses in class file %s",
2737 CHECK_0);
2738 }
2739 }
2740 }
2741
2742 // Set EnclosingMethod class and method indexes.
2743 if (parsed_enclosingmethod_attribute) {
2744 inner_classes->at_put(index++, enclosing_method_class_index);
2745 inner_classes->at_put(index++, enclosing_method_method_index);
2746 }
2747 assert(index == size, "wrong size");
2748
2749 // Restore buffer's current position.
2750 cfs->set_current(current_mark);
2751
2752 return length;
2753 }
2754
2755 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
2756 set_class_synthetic_flag(true);
2757 }
2758
2759 void ClassFileParser::parse_classfile_signature_attribute(TRAPS) {
2760 ClassFileStream* cfs = stream();
2761 u2 signature_index = cfs->get_u2(CHECK);
2762 check_property(
2763 valid_symbol_at(signature_index),
2764 "Invalid constant pool index %u in Signature attribute in class file %s",
2765 signature_index, CHECK);
2766 set_class_generic_signature_index(signature_index);
2767 }
2768
2769 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(u4 attribute_byte_length, TRAPS) {
2770 ClassFileStream* cfs = stream();
2771 u1* current_start = cfs->current();
2772
2773 cfs->guarantee_more(2, CHECK); // length
2774 int attribute_array_length = cfs->get_u2_fast();
2775
2776 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2777 "Short length on BootstrapMethods in class file %s",
2778 CHECK);
2779
2780 // The attribute contains a counted array of counted tuples of shorts,
2781 // represending bootstrap specifiers:
2782 // length*{bootstrap_method_index, argument_count*{argument_index}}
2783 int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2784 // operand_count = number of shorts in attr, except for leading length
2785
2786 // The attribute is copied into a short[] array.
2787 // The array begins with a series of short[2] pairs, one for each tuple.
2788 int index_size = (attribute_array_length * 2);
2789
2790 Array<u2>* operands = MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
2791
2792 // Eagerly assign operands so they will be deallocated with the constant
2793 // pool if there is an error.
2794 _cp->set_operands(operands);
2795
2796 int operand_fill_index = index_size;
2797 int cp_size = _cp->length();
2798
2799 for (int n = 0; n < attribute_array_length; n++) {
2800 // Store a 32-bit offset into the header of the operand array.
2801 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
2802
2803 // Read a bootstrap specifier.
2804 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
2805 u2 bootstrap_method_index = cfs->get_u2_fast();
2806 u2 argument_count = cfs->get_u2_fast();
2807 check_property(
2808 valid_cp_range(bootstrap_method_index, cp_size) &&
2809 _cp->tag_at(bootstrap_method_index).is_method_handle(),
2810 "bootstrap_method_index %u has bad constant type in class file %s",
2811 bootstrap_method_index,
2812 CHECK);
2813 operands->at_put(operand_fill_index++, bootstrap_method_index);
2814 operands->at_put(operand_fill_index++, argument_count);
2815
2816 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
2817 for (int j = 0; j < argument_count; j++) {
2818 u2 argument_index = cfs->get_u2_fast();
2819 check_property(
2820 valid_cp_range(argument_index, cp_size) &&
2821 _cp->tag_at(argument_index).is_loadable_constant(),
2822 "argument_index %u has bad constant type in class file %s",
2823 argument_index,
2824 CHECK);
2825 operands->at_put(operand_fill_index++, argument_index);
2826 }
2827 }
2828
2829 assert(operand_fill_index == operands->length(), "exact fill");
2830 assert(ConstantPool::operand_array_length(operands) == attribute_array_length, "correct decode");
2831
2832 u1* current_end = cfs->current();
2833 guarantee_property(current_end == current_start + attribute_byte_length,
2834 "Bad length on BootstrapMethods in class file %s",
2835 CHECK);
2836 }
2837
2838 void ClassFileParser::parse_classfile_attributes(ClassFileParser::ClassAnnotationCollector* parsed_annotations,
2839 TRAPS) {
2840 ClassFileStream* cfs = stream();
2841 // Set inner classes attribute to default sentinel
2842 _inner_classes = Universe::the_empty_short_array();
2843 cfs->guarantee_more(2, CHECK); // attributes_count
2844 u2 attributes_count = cfs->get_u2_fast();
2845 bool parsed_sourcefile_attribute = false;
2846 bool parsed_innerclasses_attribute = false;
2847 bool parsed_enclosingmethod_attribute = false;
2848 bool parsed_bootstrap_methods_attribute = false;
2849 u1* runtime_visible_annotations = NULL;
2850 int runtime_visible_annotations_length = 0;
2851 u1* runtime_invisible_annotations = NULL;
2852 int runtime_invisible_annotations_length = 0;
2853 u1* runtime_visible_type_annotations = NULL;
2854 int runtime_visible_type_annotations_length = 0;
2855 u1* runtime_invisible_type_annotations = NULL;
2856 int runtime_invisible_type_annotations_length = 0;
2857 bool runtime_invisible_type_annotations_exists = false;
2858 u1* inner_classes_attribute_start = NULL;
2859 u4 inner_classes_attribute_length = 0;
2860 u2 enclosing_method_class_index = 0;
2861 u2 enclosing_method_method_index = 0;
2862 // Iterate over attributes
2863 while (attributes_count--) {
2864 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
2865 u2 attribute_name_index = cfs->get_u2_fast();
2866 u4 attribute_length = cfs->get_u4_fast();
2867 check_property(
2868 valid_symbol_at(attribute_name_index),
2869 "Attribute name has bad constant pool index %u in class file %s",
2870 attribute_name_index, CHECK);
2871 Symbol* tag = _cp->symbol_at(attribute_name_index);
2872 if (tag == vmSymbols::tag_source_file()) {
2873 // Check for SourceFile tag
2874 if (_need_verify) {
2875 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2876 }
2877 if (parsed_sourcefile_attribute) {
2878 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2879 } else {
2880 parsed_sourcefile_attribute = true;
2881 }
2882 parse_classfile_sourcefile_attribute(CHECK);
2883 } else if (tag == vmSymbols::tag_source_debug_extension()) {
2884 // Check for SourceDebugExtension tag
2885 parse_classfile_source_debug_extension_attribute((int)attribute_length, CHECK);
2886 } else if (tag == vmSymbols::tag_inner_classes()) {
2887 // Check for InnerClasses tag
2888 if (parsed_innerclasses_attribute) {
2889 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2890 } else {
2891 parsed_innerclasses_attribute = true;
2892 }
2893 inner_classes_attribute_start = cfs->get_u1_buffer();
2894 inner_classes_attribute_length = attribute_length;
2895 cfs->skip_u1(inner_classes_attribute_length, CHECK);
2896 } else if (tag == vmSymbols::tag_synthetic()) {
2897 // Check for Synthetic tag
2898 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2899 if (attribute_length != 0) {
2900 classfile_parse_error(
2901 "Invalid Synthetic classfile attribute length %u in class file %s",
2902 attribute_length, CHECK);
2903 }
2904 parse_classfile_synthetic_attribute(CHECK);
2905 } else if (tag == vmSymbols::tag_deprecated()) {
2906 // Check for Deprecatd tag - 4276120
2907 if (attribute_length != 0) {
2908 classfile_parse_error(
2909 "Invalid Deprecated classfile attribute length %u in class file %s",
2910 attribute_length, CHECK);
2911 }
2912 } else if (_major_version >= JAVA_1_5_VERSION) {
2913 if (tag == vmSymbols::tag_signature()) {
2914 if (attribute_length != 2) {
2915 classfile_parse_error(
2916 "Wrong Signature attribute length %u in class file %s",
2917 attribute_length, CHECK);
2918 }
2919 parse_classfile_signature_attribute(CHECK);
2920 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2921 runtime_visible_annotations_length = attribute_length;
2922 runtime_visible_annotations = cfs->get_u1_buffer();
2923 assert(runtime_visible_annotations != NULL, "null visible annotations");
2924 parse_annotations(runtime_visible_annotations,
2925 runtime_visible_annotations_length,
2926 parsed_annotations,
2927 CHECK);
2928 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2929 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
2930 runtime_invisible_annotations_length = attribute_length;
2931 runtime_invisible_annotations = cfs->get_u1_buffer();
2932 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2933 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
2934 } else if (tag == vmSymbols::tag_enclosing_method()) {
2935 if (parsed_enclosingmethod_attribute) {
2936 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2937 } else {
2938 parsed_enclosingmethod_attribute = true;
2939 }
2940 cfs->guarantee_more(4, CHECK); // class_index, method_index
2941 enclosing_method_class_index = cfs->get_u2_fast();
2942 enclosing_method_method_index = cfs->get_u2_fast();
2943 if (enclosing_method_class_index == 0) {
2944 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2945 }
2946 // Validate the constant pool indices and types
2947 check_property(valid_klass_reference_at(enclosing_method_class_index),
2948 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2949 if (enclosing_method_method_index != 0 &&
2950 (!_cp->is_within_bounds(enclosing_method_method_index) ||
2951 !_cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
2952 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
2953 }
2954 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
2955 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
2956 if (parsed_bootstrap_methods_attribute)
2957 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
2958 parsed_bootstrap_methods_attribute = true;
2959 parse_classfile_bootstrap_methods_attribute(attribute_length, CHECK);
2960 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
2961 if (runtime_visible_type_annotations != NULL) {
2962 classfile_parse_error(
2963 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
2964 }
2965 runtime_visible_type_annotations_length = attribute_length;
2966 runtime_visible_type_annotations = cfs->get_u1_buffer();
2967 assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2968 // No need for the VM to parse Type annotations
2969 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
2970 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
2971 if (runtime_invisible_type_annotations_exists) {
2972 classfile_parse_error(
2973 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
2974 } else {
2975 runtime_invisible_type_annotations_exists = true;
2976 }
2977 if (PreserveAllAnnotations) {
2978 runtime_invisible_type_annotations_length = attribute_length;
2979 runtime_invisible_type_annotations = cfs->get_u1_buffer();
2980 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2981 }
2982 cfs->skip_u1(attribute_length, CHECK);
2983 } else {
2984 // Unknown attribute
2985 cfs->skip_u1(attribute_length, CHECK);
2986 }
2987 } else {
2988 // Unknown attribute
2989 cfs->skip_u1(attribute_length, CHECK);
2990 }
2991 }
2992 _annotations = assemble_annotations(runtime_visible_annotations,
2993 runtime_visible_annotations_length,
2994 runtime_invisible_annotations,
2995 runtime_invisible_annotations_length,
2996 CHECK);
2997 _type_annotations = assemble_annotations(runtime_visible_type_annotations,
2998 runtime_visible_type_annotations_length,
2999 runtime_invisible_type_annotations,
3000 runtime_invisible_type_annotations_length,
3001 CHECK);
3002
3003 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3004 u2 num_of_classes = parse_classfile_inner_classes_attribute(
3005 inner_classes_attribute_start,
3006 parsed_innerclasses_attribute,
3007 enclosing_method_class_index,
3008 enclosing_method_method_index,
3009 CHECK);
3010 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3011 guarantee_property(
3012 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3013 "Wrong InnerClasses attribute length in class file %s", CHECK);
3014 }
3015 }
3016
3017 if (_max_bootstrap_specifier_index >= 0) {
3018 guarantee_property(parsed_bootstrap_methods_attribute,
3019 "Missing BootstrapMethods attribute in class file %s", CHECK);
3020 }
3021 }
3022
3023 void ClassFileParser::apply_parsed_class_attributes(instanceKlassHandle k) {
3024 if (_synthetic_flag)
3025 k->set_is_synthetic();
3026 if (_sourcefile_index != 0) {
3027 k->set_source_file_name_index(_sourcefile_index);
3028 }
3029 if (_generic_signature_index != 0) {
3030 k->set_generic_signature_index(_generic_signature_index);
3031 }
3032 if (_sde_buffer != NULL) {
3033 k->set_source_debug_extension(_sde_buffer, _sde_length);
3034 }
3035 }
3036
3037 // Transfer ownership of metadata allocated to the InstanceKlass.
3038 void ClassFileParser::apply_parsed_class_metadata(
3039 instanceKlassHandle this_klass,
3040 int java_fields_count, TRAPS) {
3041 // Assign annotations if needed
3042 if (_annotations != NULL || _type_annotations != NULL ||
3043 _fields_annotations != NULL || _fields_type_annotations != NULL) {
3044 Annotations* annotations = Annotations::allocate(_loader_data, CHECK);
3045 annotations->set_class_annotations(_annotations);
3046 annotations->set_class_type_annotations(_type_annotations);
3047 annotations->set_fields_annotations(_fields_annotations);
3048 annotations->set_fields_type_annotations(_fields_type_annotations);
3049 this_klass->set_annotations(annotations);
3050 }
3051
3052 _cp->set_pool_holder(this_klass());
3053 this_klass->set_constants(_cp);
3054 this_klass->set_fields(_fields, java_fields_count);
3055 this_klass->set_methods(_methods);
3056 this_klass->set_inner_classes(_inner_classes);
3057 this_klass->set_local_interfaces(_local_interfaces);
3058 this_klass->set_transitive_interfaces(_transitive_interfaces);
3059
3060 // Clear out these fields so they don't get deallocated by the destructor
3061 clear_class_metadata();
3062 }
3063
3064 AnnotationArray* ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
3065 int runtime_visible_annotations_length,
3066 u1* runtime_invisible_annotations,
3067 int runtime_invisible_annotations_length, TRAPS) {
3068 AnnotationArray* annotations = NULL;
3069 if (runtime_visible_annotations != NULL ||
3070 runtime_invisible_annotations != NULL) {
3071 annotations = MetadataFactory::new_array<u1>(_loader_data,
3072 runtime_visible_annotations_length +
3073 runtime_invisible_annotations_length,
3074 CHECK_(annotations));
3075 if (runtime_visible_annotations != NULL) {
3076 for (int i = 0; i < runtime_visible_annotations_length; i++) {
3077 annotations->at_put(i, runtime_visible_annotations[i]);
3078 }
3079 }
3080 if (runtime_invisible_annotations != NULL) {
3081 for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3082 int append = runtime_visible_annotations_length+i;
3083 annotations->at_put(append, runtime_invisible_annotations[i]);
3084 }
3085 }
3086 }
3087 return annotations;
3088 }
3089
3090 instanceKlassHandle ClassFileParser::parse_super_class(int super_class_index,
3091 TRAPS) {
3092 instanceKlassHandle super_klass;
3093 if (super_class_index == 0) {
3094 check_property(_class_name == vmSymbols::java_lang_Object(),
3095 "Invalid superclass index %u in class file %s",
3096 super_class_index,
3097 CHECK_NULL);
3098 } else {
3099 check_property(valid_klass_reference_at(super_class_index),
3100 "Invalid superclass index %u in class file %s",
3101 super_class_index,
3102 CHECK_NULL);
3103 // The class name should be legal because it is checked when parsing constant pool.
3104 // However, make sure it is not an array type.
3105 bool is_array = false;
3106 if (_cp->tag_at(super_class_index).is_klass()) {
3107 super_klass = instanceKlassHandle(THREAD, _cp->resolved_klass_at(super_class_index));
3108 if (_need_verify)
3109 is_array = super_klass->oop_is_array();
3110 } else if (_need_verify) {
3111 is_array = (_cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3112 }
3113 if (_need_verify) {
3114 guarantee_property(!is_array,
3115 "Bad superclass name in class file %s", CHECK_NULL);
3116 }
3117 }
3118 return super_klass;
3119 }
3120
3121
3122 // Values needed for oopmap and InstanceKlass creation
3123 class FieldLayoutInfo : public StackObj {
3124 public:
3125 int* nonstatic_oop_offsets;
3126 unsigned int* nonstatic_oop_counts;
3127 unsigned int nonstatic_oop_map_count;
3128 unsigned int total_oop_map_count;
3129 int instance_size;
3130 int nonstatic_field_size;
3131 int static_field_size;
3132 bool has_nonstatic_fields;
3133 };
3134
3135 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
3136 void ClassFileParser::layout_fields(Handle class_loader,
3137 FieldAllocationCount* fac,
3138 ClassAnnotationCollector* parsed_annotations,
3139 FieldLayoutInfo* info,
3140 TRAPS) {
3141
3142 // Field size and offset computation
3143 int nonstatic_field_size = _super_klass() == NULL ? 0 : _super_klass()->nonstatic_field_size();
3144 int next_static_oop_offset;
3145 int next_static_double_offset;
3146 int next_static_word_offset;
3147 int next_static_short_offset;
3148 int next_static_byte_offset;
3149 int next_nonstatic_oop_offset;
3150 int next_nonstatic_double_offset;
3151 int next_nonstatic_word_offset;
3152 int next_nonstatic_short_offset;
3153 int next_nonstatic_byte_offset;
3154 int first_nonstatic_oop_offset;
3155 int next_nonstatic_field_offset;
3156 int next_nonstatic_padded_offset;
3157
3158 // Count the contended fields by type.
3159 //
3160 // We ignore static fields, because @Contended is not supported for them.
3161 // The layout code below will also ignore the static fields.
3162 int nonstatic_contended_count = 0;
3163 FieldAllocationCount fac_contended;
3164 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3165 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3166 if (fs.is_contended()) {
3167 fac_contended.count[atype]++;
3168 if (!fs.access_flags().is_static()) {
3169 nonstatic_contended_count++;
3170 }
3171 }
3172 }
3173
3174
3175 // Calculate the starting byte offsets
3176 next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
3177 next_static_double_offset = next_static_oop_offset +
3178 ((fac->count[STATIC_OOP]) * heapOopSize);
3179 if ( fac->count[STATIC_DOUBLE] &&
3180 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3181 Universe::field_type_should_be_aligned(T_LONG)) ) {
3182 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3183 }
3184
3185 next_static_word_offset = next_static_double_offset +
3186 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3187 next_static_short_offset = next_static_word_offset +
3188 ((fac->count[STATIC_WORD]) * BytesPerInt);
3189 next_static_byte_offset = next_static_short_offset +
3190 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3191
3192 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
3193 nonstatic_field_size * heapOopSize;
3194
3195 next_nonstatic_field_offset = nonstatic_fields_start;
3196
3197 bool is_contended_class = parsed_annotations->is_contended();
3198
3199 // Class is contended, pad before all the fields
3200 if (is_contended_class) {
3201 next_nonstatic_field_offset += ContendedPaddingWidth;
3202 }
3203
3204 // Compute the non-contended fields count.
3205 // The packing code below relies on these counts to determine if some field
3206 // can be squeezed into the alignment gap. Contended fields are obviously
3207 // exempt from that.
3208 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3209 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
3210 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
3211 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
3212 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
3213
3214 // Total non-static fields count, including every contended field
3215 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3216 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3217 fac->count[NONSTATIC_OOP];
3218
3219 bool super_has_nonstatic_fields =
3220 (_super_klass() != NULL && _super_klass->has_nonstatic_fields());
3221 bool has_nonstatic_fields = super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3222
3223
3224 // Prepare list of oops for oop map generation.
3225 //
3226 // "offset" and "count" lists are describing the set of contiguous oop
3227 // regions. offset[i] is the start of the i-th region, which then has
3228 // count[i] oops following. Before we know how many regions are required,
3229 // we pessimistically allocate the maps to fit all the oops into the
3230 // distinct regions.
3231 //
3232 // TODO: We add +1 to always allocate non-zero resource arrays; we need
3233 // to figure out if we still need to do this.
3234 int* nonstatic_oop_offsets;
3235 unsigned int* nonstatic_oop_counts;
3236 unsigned int nonstatic_oop_map_count = 0;
3237 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
3238
3239 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3240 THREAD, int, max_nonstatic_oop_maps);
3241 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3242 THREAD, unsigned int, max_nonstatic_oop_maps);
3243
3244 first_nonstatic_oop_offset = 0; // will be set for first oop field
3245
3246 bool compact_fields = CompactFields;
3247 int allocation_style = FieldsAllocationStyle;
3248 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3249 assert(false, "0 <= FieldsAllocationStyle <= 2");
3250 allocation_style = 1; // Optimistic
3251 }
3252
3253 // The next classes have predefined hard-coded fields offsets
3254 // (see in JavaClasses::compute_hard_coded_offsets()).
3255 // Use default fields allocation order for them.
3256 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3257 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3258 _class_name == vmSymbols::java_lang_Class() ||
3259 _class_name == vmSymbols::java_lang_ClassLoader() ||
3260 _class_name == vmSymbols::java_lang_ref_Reference() ||
3261 _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3262 _class_name == vmSymbols::java_lang_StackTraceElement() ||
3263 _class_name == vmSymbols::java_lang_String() ||
3264 _class_name == vmSymbols::java_lang_Throwable() ||
3265 _class_name == vmSymbols::java_lang_Boolean() ||
3266 _class_name == vmSymbols::java_lang_Character() ||
3267 _class_name == vmSymbols::java_lang_Float() ||
3268 _class_name == vmSymbols::java_lang_Double() ||
3269 _class_name == vmSymbols::java_lang_Byte() ||
3270 _class_name == vmSymbols::java_lang_Short() ||
3271 _class_name == vmSymbols::java_lang_Integer() ||
3272 _class_name == vmSymbols::java_lang_Long())) {
3273 allocation_style = 0; // Allocate oops first
3274 compact_fields = false; // Don't compact fields
3275 }
3276
3277 // Rearrange fields for a given allocation style
3278 if( allocation_style == 0 ) {
3279 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3280 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3281 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3282 (nonstatic_oop_count * heapOopSize);
3283 } else if( allocation_style == 1 ) {
3284 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3285 next_nonstatic_double_offset = next_nonstatic_field_offset;
3286 } else if( allocation_style == 2 ) {
3287 // Fields allocation: oops fields in super and sub classes are together.
3288 if( nonstatic_field_size > 0 && _super_klass() != NULL &&
3289 _super_klass->nonstatic_oop_map_size() > 0 ) {
3290 unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3291 OopMapBlock* first_map = _super_klass->start_of_nonstatic_oop_maps();
3292 OopMapBlock* last_map = first_map + map_count - 1;
3293 int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3294 if (next_offset == next_nonstatic_field_offset) {
3295 allocation_style = 0; // allocate oops first
3296 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3297 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3298 (nonstatic_oop_count * heapOopSize);
3299 }
3300 }
3301 if( allocation_style == 2 ) {
3302 allocation_style = 1; // allocate oops last
3303 next_nonstatic_double_offset = next_nonstatic_field_offset;
3304 }
3305 } else {
3306 ShouldNotReachHere();
3307 }
3308
3309 int nonstatic_oop_space_count = 0;
3310 int nonstatic_word_space_count = 0;
3311 int nonstatic_short_space_count = 0;
3312 int nonstatic_byte_space_count = 0;
3313 int nonstatic_oop_space_offset;
3314 int nonstatic_word_space_offset;
3315 int nonstatic_short_space_offset;
3316 int nonstatic_byte_space_offset;
3317
3318 // Try to squeeze some of the fields into the gaps due to
3319 // long/double alignment.
3320 if( nonstatic_double_count > 0 ) {
3321 int offset = next_nonstatic_double_offset;
3322 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3323 if( compact_fields && offset != next_nonstatic_double_offset ) {
3324 // Allocate available fields into the gap before double field.
3325 int length = next_nonstatic_double_offset - offset;
3326 assert(length == BytesPerInt, "");
3327 nonstatic_word_space_offset = offset;
3328 if( nonstatic_word_count > 0 ) {
3329 nonstatic_word_count -= 1;
3330 nonstatic_word_space_count = 1; // Only one will fit
3331 length -= BytesPerInt;
3332 offset += BytesPerInt;
3333 }
3334 nonstatic_short_space_offset = offset;
3335 while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3336 nonstatic_short_count -= 1;
3337 nonstatic_short_space_count += 1;
3338 length -= BytesPerShort;
3339 offset += BytesPerShort;
3340 }
3341 nonstatic_byte_space_offset = offset;
3342 while( length > 0 && nonstatic_byte_count > 0 ) {
3343 nonstatic_byte_count -= 1;
3344 nonstatic_byte_space_count += 1;
3345 length -= 1;
3346 }
3347 // Allocate oop field in the gap if there are no other fields for that.
3348 nonstatic_oop_space_offset = offset;
3349 if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3350 allocation_style != 0 ) { // when oop fields not first
3351 nonstatic_oop_count -= 1;
3352 nonstatic_oop_space_count = 1; // Only one will fit
3353 length -= heapOopSize;
3354 offset += heapOopSize;
3355 }
3356 }
3357 }
3358
3359 next_nonstatic_word_offset = next_nonstatic_double_offset +
3360 (nonstatic_double_count * BytesPerLong);
3361 next_nonstatic_short_offset = next_nonstatic_word_offset +
3362 (nonstatic_word_count * BytesPerInt);
3363 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3364 (nonstatic_short_count * BytesPerShort);
3365 next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3366 nonstatic_byte_count;
3367
3368 // let oops jump before padding with this allocation style
3369 if( allocation_style == 1 ) {
3370 next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3371 if( nonstatic_oop_count > 0 ) {
3372 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3373 }
3374 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3375 }
3376
3377 // Iterate over fields again and compute correct offsets.
3378 // The field allocation type was temporarily stored in the offset slot.
3379 // oop fields are located before non-oop fields (static and non-static).
3380 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3381
3382 // skip already laid out fields
3383 if (fs.is_offset_set()) continue;
3384
3385 // contended instance fields are handled below
3386 if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3387
3388 int real_offset;
3389 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3390
3391 // pack the rest of the fields
3392 switch (atype) {
3393 case STATIC_OOP:
3394 real_offset = next_static_oop_offset;
3395 next_static_oop_offset += heapOopSize;
3396 break;
3397 case STATIC_BYTE:
3398 real_offset = next_static_byte_offset;
3399 next_static_byte_offset += 1;
3400 break;
3401 case STATIC_SHORT:
3402 real_offset = next_static_short_offset;
3403 next_static_short_offset += BytesPerShort;
3404 break;
3405 case STATIC_WORD:
3406 real_offset = next_static_word_offset;
3407 next_static_word_offset += BytesPerInt;
3408 break;
3409 case STATIC_DOUBLE:
3410 real_offset = next_static_double_offset;
3411 next_static_double_offset += BytesPerLong;
3412 break;
3413 case NONSTATIC_OOP:
3414 if( nonstatic_oop_space_count > 0 ) {
3415 real_offset = nonstatic_oop_space_offset;
3416 nonstatic_oop_space_offset += heapOopSize;
3417 nonstatic_oop_space_count -= 1;
3418 } else {
3419 real_offset = next_nonstatic_oop_offset;
3420 next_nonstatic_oop_offset += heapOopSize;
3421 }
3422 // Update oop maps
3423 if( nonstatic_oop_map_count > 0 &&
3424 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3425 real_offset -
3426 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3427 heapOopSize ) {
3428 // Extend current oop map
3429 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3430 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3431 } else {
3432 // Create new oop map
3433 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3434 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3435 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3436 nonstatic_oop_map_count += 1;
3437 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3438 first_nonstatic_oop_offset = real_offset;
3439 }
3440 }
3441 break;
3442 case NONSTATIC_BYTE:
3443 if( nonstatic_byte_space_count > 0 ) {
3444 real_offset = nonstatic_byte_space_offset;
3445 nonstatic_byte_space_offset += 1;
3446 nonstatic_byte_space_count -= 1;
3447 } else {
3448 real_offset = next_nonstatic_byte_offset;
3449 next_nonstatic_byte_offset += 1;
3450 }
3451 break;
3452 case NONSTATIC_SHORT:
3453 if( nonstatic_short_space_count > 0 ) {
3454 real_offset = nonstatic_short_space_offset;
3455 nonstatic_short_space_offset += BytesPerShort;
3456 nonstatic_short_space_count -= 1;
3457 } else {
3458 real_offset = next_nonstatic_short_offset;
3459 next_nonstatic_short_offset += BytesPerShort;
3460 }
3461 break;
3462 case NONSTATIC_WORD:
3463 if( nonstatic_word_space_count > 0 ) {
3464 real_offset = nonstatic_word_space_offset;
3465 nonstatic_word_space_offset += BytesPerInt;
3466 nonstatic_word_space_count -= 1;
3467 } else {
3468 real_offset = next_nonstatic_word_offset;
3469 next_nonstatic_word_offset += BytesPerInt;
3470 }
3471 break;
3472 case NONSTATIC_DOUBLE:
3473 real_offset = next_nonstatic_double_offset;
3474 next_nonstatic_double_offset += BytesPerLong;
3475 break;
3476 default:
3477 ShouldNotReachHere();
3478 }
3479 fs.set_offset(real_offset);
3480 }
3481
3482
3483 // Handle the contended cases.
3484 //
3485 // Each contended field should not intersect the cache line with another contended field.
3486 // In the absence of alignment information, we end up with pessimistically separating
3487 // the fields with full-width padding.
3488 //
3489 // Additionally, this should not break alignment for the fields, so we round the alignment up
3490 // for each field.
3491 if (nonstatic_contended_count > 0) {
3492
3493 // if there is at least one contended field, we need to have pre-padding for them
3494 next_nonstatic_padded_offset += ContendedPaddingWidth;
3495
3496 // collect all contended groups
3497 BitMap bm(_cp->size());
3498 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3499 // skip already laid out fields
3500 if (fs.is_offset_set()) continue;
3501
3502 if (fs.is_contended()) {
3503 bm.set_bit(fs.contended_group());
3504 }
3505 }
3506
3507 int current_group = -1;
3508 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3509
3510 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3511
3512 // skip already laid out fields
3513 if (fs.is_offset_set()) continue;
3514
3515 // skip non-contended fields and fields from different group
3516 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3517
3518 // handle statics below
3519 if (fs.access_flags().is_static()) continue;
3520
3521 int real_offset;
3522 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3523
3524 switch (atype) {
3525 case NONSTATIC_BYTE:
3526 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
3527 real_offset = next_nonstatic_padded_offset;
3528 next_nonstatic_padded_offset += 1;
3529 break;
3530
3531 case NONSTATIC_SHORT:
3532 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
3533 real_offset = next_nonstatic_padded_offset;
3534 next_nonstatic_padded_offset += BytesPerShort;
3535 break;
3536
3537 case NONSTATIC_WORD:
3538 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
3539 real_offset = next_nonstatic_padded_offset;
3540 next_nonstatic_padded_offset += BytesPerInt;
3541 break;
3542
3543 case NONSTATIC_DOUBLE:
3544 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
3545 real_offset = next_nonstatic_padded_offset;
3546 next_nonstatic_padded_offset += BytesPerLong;
3547 break;
3548
3549 case NONSTATIC_OOP:
3550 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
3551 real_offset = next_nonstatic_padded_offset;
3552 next_nonstatic_padded_offset += heapOopSize;
3553
3554 // Create new oop map
3555 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3556 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3557 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3558 nonstatic_oop_map_count += 1;
3559 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3560 first_nonstatic_oop_offset = real_offset;
3561 }
3562 break;
3563
3564 default:
3565 ShouldNotReachHere();
3566 }
3567
3568 if (fs.contended_group() == 0) {
3569 // Contended group defines the equivalence class over the fields:
3570 // the fields within the same contended group are not inter-padded.
3571 // The only exception is default group, which does not incur the
3572 // equivalence, and so requires intra-padding.
3573 next_nonstatic_padded_offset += ContendedPaddingWidth;
3574 }
3575
3576 fs.set_offset(real_offset);
3577 } // for
3578
3579 // Start laying out the next group.
3580 // Note that this will effectively pad the last group in the back;
3581 // this is expected to alleviate memory contention effects for
3582 // subclass fields and/or adjacent object.
3583 // If this was the default group, the padding is already in place.
3584 if (current_group != 0) {
3585 next_nonstatic_padded_offset += ContendedPaddingWidth;
3586 }
3587 }
3588
3589 // handle static fields
3590 }
3591
3592 // Entire class is contended, pad in the back.
3593 // This helps to alleviate memory contention effects for subclass fields
3594 // and/or adjacent object.
3595 if (is_contended_class) {
3596 next_nonstatic_padded_offset += ContendedPaddingWidth;
3597 }
3598
3599 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
3600
3601 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
3602 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
3603 int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
3604
3605 int static_field_size = (static_fields_end -
3606 InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
3607 nonstatic_field_size = nonstatic_field_size +
3608 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
3609
3610 int instance_size = align_object_size(instance_end / wordSize);
3611
3612 assert(instance_size == align_object_size(align_size_up(
3613 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
3614 wordSize) / wordSize), "consistent layout helper value");
3615
3616 // Invariant: nonstatic_field end/start should only change if there are
3617 // nonstatic fields in the class, or if the class is contended. We compare
3618 // against the non-aligned value, so that end alignment will not fail the
3619 // assert without actually having the fields.
3620 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
3621 is_contended_class ||
3622 (nonstatic_fields_count > 0), "double-check nonstatic start/end");
3623
3624 // Number of non-static oop map blocks allocated at end of klass.
3625 const unsigned int total_oop_map_count =
3626 compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
3627 first_nonstatic_oop_offset);
3628
3629 #ifndef PRODUCT
3630 if (PrintFieldLayout) {
3631 print_field_layout(_class_name,
3632 _fields,
3633 _cp,
3634 instance_size,
3635 nonstatic_fields_start,
3636 nonstatic_fields_end,
3637 static_fields_end);
3638 }
3639
3640 #endif
3641 // Pass back information needed for InstanceKlass creation
3642 info->nonstatic_oop_offsets = nonstatic_oop_offsets;
3643 info->nonstatic_oop_counts = nonstatic_oop_counts;
3644 info->nonstatic_oop_map_count = nonstatic_oop_map_count;
3645 info->total_oop_map_count = total_oop_map_count;
3646 info->instance_size = instance_size;
3647 info->static_field_size = static_field_size;
3648 info->nonstatic_field_size = nonstatic_field_size;
3649 info->has_nonstatic_fields = has_nonstatic_fields;
3650 }
3651
3652
3653 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
3654 ClassLoaderData* loader_data,
3655 Handle protection_domain,
3656 KlassHandle host_klass,
3657 GrowableArray<Handle>* cp_patches,
3658 TempNewSymbol& parsed_name,
3659 bool verify,
3660 TRAPS) {
3661
3662 // When a retransformable agent is attached, JVMTI caches the
3663 // class bytes that existed before the first retransformation.
3664 // If RedefineClasses() was used before the retransformable
3665 // agent attached, then the cached class bytes may not be the
3666 // original class bytes.
3667 JvmtiCachedClassFileData *cached_class_file = NULL;
3668 Handle class_loader(THREAD, loader_data->class_loader());
3669 bool has_default_methods = false;
3670 ResourceMark rm(THREAD);
3671
3672 ClassFileStream* cfs = stream();
3673 // Timing
3674 assert(THREAD->is_Java_thread(), "must be a JavaThread");
3675 JavaThread* jt = (JavaThread*) THREAD;
3676
3677 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
3678 ClassLoader::perf_class_parse_selftime(),
3679 NULL,
3680 jt->get_thread_stat()->perf_recursion_counts_addr(),
3681 jt->get_thread_stat()->perf_timers_addr(),
3682 PerfClassTraceTime::PARSE_CLASS);
3683
3684 init_parsed_class_attributes(loader_data);
3685
3686 if (JvmtiExport::should_post_class_file_load_hook()) {
3687 // Get the cached class file bytes (if any) from the class that
3688 // is being redefined or retransformed. We use jvmti_thread_state()
3689 // instead of JvmtiThreadState::state_for(jt) so we don't allocate
3690 // a JvmtiThreadState any earlier than necessary. This will help
3691 // avoid the bug described by 7126851.
3692 JvmtiThreadState *state = jt->jvmti_thread_state();
3693 if (state != NULL) {
3694 KlassHandle *h_class_being_redefined =
3695 state->get_class_being_redefined();
3696 if (h_class_being_redefined != NULL) {
3697 instanceKlassHandle ikh_class_being_redefined =
3698 instanceKlassHandle(THREAD, (*h_class_being_redefined)());
3699 cached_class_file = ikh_class_being_redefined->get_cached_class_file();
3700 }
3701 }
3702
3703 unsigned char* ptr = cfs->buffer();
3704 unsigned char* end_ptr = cfs->buffer() + cfs->length();
3705
3706 JvmtiExport::post_class_file_load_hook(name, class_loader(), protection_domain,
3707 &ptr, &end_ptr, &cached_class_file);
3708
3709 if (ptr != cfs->buffer()) {
3710 // JVMTI agent has modified class file data.
3711 // Set new class file stream using JVMTI agent modified
3712 // class file data.
3713 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
3714 set_stream(cfs);
3715 }
3716 }
3717
3718 _host_klass = host_klass;
3719 _cp_patches = cp_patches;
3720
3721 instanceKlassHandle nullHandle;
3722
3723 // Figure out whether we can skip format checking (matching classic VM behavior)
3724 _need_verify = Verifier::should_verify_for(class_loader(), verify);
3725
3726 // Set the verify flag in stream
3727 cfs->set_verify(_need_verify);
3728
3729 // Save the class file name for easier error message printing.
3730 _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
3731
3732 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
3733 // Magic value
3734 u4 magic = cfs->get_u4_fast();
3735 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
3736 "Incompatible magic value %u in class file %s",
3737 magic, CHECK_(nullHandle));
3738
3739 // Version numbers
3740 u2 minor_version = cfs->get_u2_fast();
3741 u2 major_version = cfs->get_u2_fast();
3742
3743 // Check version numbers - we check this even with verifier off
3744 if (!is_supported_version(major_version, minor_version)) {
3745 if (name == NULL) {
3746 Exceptions::fthrow(
3747 THREAD_AND_LOCATION,
3748 vmSymbols::java_lang_UnsupportedClassVersionError(),
3749 "Unsupported major.minor version %u.%u",
3750 major_version,
3751 minor_version);
3752 } else {
3753 ResourceMark rm(THREAD);
3754 Exceptions::fthrow(
3755 THREAD_AND_LOCATION,
3756 vmSymbols::java_lang_UnsupportedClassVersionError(),
3757 "%s : Unsupported major.minor version %u.%u",
3758 name->as_C_string(),
3759 major_version,
3760 minor_version);
3761 }
3762 return nullHandle;
3763 }
3764
3765 _major_version = major_version;
3766 _minor_version = minor_version;
3767
3768
3769 // Check if verification needs to be relaxed for this class file
3770 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
3771 _relax_verify = Verifier::relax_verify_for(class_loader());
3772
3773 // Constant pool
3774 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle));
3775
3776 int cp_size = cp->length();
3777
3778 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
3779
3780 // Access flags
3781 AccessFlags access_flags;
3782 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
3783
3784 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3785 // Set abstract bit for old class files for backward compatibility
3786 flags |= JVM_ACC_ABSTRACT;
3787 }
3788 verify_legal_class_modifiers(flags, CHECK_(nullHandle));
3789 access_flags.set_flags(flags);
3790
3791 // This class and superclass
3792 u2 this_class_index = cfs->get_u2_fast();
3793 check_property(
3794 valid_cp_range(this_class_index, cp_size) &&
3795 cp->tag_at(this_class_index).is_unresolved_klass(),
3796 "Invalid this class index %u in constant pool in class file %s",
3797 this_class_index, CHECK_(nullHandle));
3798
3799 Symbol* class_name = cp->unresolved_klass_at(this_class_index);
3800 assert(class_name != NULL, "class_name can't be null");
3801
3802 // It's important to set parsed_name *before* resolving the super class.
3803 // (it's used for cleanup by the caller if parsing fails)
3804 parsed_name = class_name;
3805 // parsed_name is returned and can be used if there's an error, so add to
3806 // its reference count. Caller will decrement the refcount.
3807 parsed_name->increment_refcount();
3808
3809 // Update _class_name which could be null previously to be class_name
3810 _class_name = class_name;
3811
3812 // Don't need to check whether this class name is legal or not.
3813 // It has been checked when constant pool is parsed.
3814 // However, make sure it is not an array type.
3815 if (_need_verify) {
3816 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
3817 "Bad class name in class file %s",
3818 CHECK_(nullHandle));
3819 }
3820
3821 Klass* preserve_this_klass; // for storing result across HandleMark
3822
3823 // release all handles when parsing is done
3824 { HandleMark hm(THREAD);
3825
3826 // Checks if name in class file matches requested name
3827 if (name != NULL && class_name != name) {
3828 ResourceMark rm(THREAD);
3829 Exceptions::fthrow(
3830 THREAD_AND_LOCATION,
3831 vmSymbols::java_lang_NoClassDefFoundError(),
3832 "%s (wrong name: %s)",
3833 name->as_C_string(),
3834 class_name->as_C_string()
3835 );
3836 return nullHandle;
3837 }
3838
3839 if (TraceClassLoadingPreorder) {
3840 tty->print("[Loading %s", (name != NULL) ? name->as_klass_external_name() : "NoName");
3841 if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
3842 tty->print_cr("]");
3843 }
3844
3845 u2 super_class_index = cfs->get_u2_fast();
3846 instanceKlassHandle super_klass = parse_super_class(super_class_index,
3847 CHECK_NULL);
3848
3849 // Interfaces
3850 u2 itfs_len = cfs->get_u2_fast();
3851 Array<Klass*>* local_interfaces =
3852 parse_interfaces(itfs_len, protection_domain, _class_name,
3853 &has_default_methods, CHECK_(nullHandle));
3854
3855 u2 java_fields_count = 0;
3856 // Fields (offsets are filled in later)
3857 FieldAllocationCount fac;
3858 Array<u2>* fields = parse_fields(class_name,
3859 access_flags.is_interface(),
3860 &fac, &java_fields_count,
3861 CHECK_(nullHandle));
3862 // Methods
3863 bool has_final_method = false;
3864 AccessFlags promoted_flags;
3865 promoted_flags.set_flags(0);
3866 Array<Method*>* methods = parse_methods(access_flags.is_interface(),
3867 &promoted_flags,
3868 &has_final_method,
3869 &has_default_methods,
3870 CHECK_(nullHandle));
3871
3872 // Additional attributes
3873 ClassAnnotationCollector parsed_annotations;
3874 parse_classfile_attributes(&parsed_annotations, CHECK_(nullHandle));
3875
3876 // Make sure this is the end of class file stream
3877 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
3878
3879 // We check super class after class file is parsed and format is checked
3880 if (super_class_index > 0 && super_klass.is_null()) {
3881 Symbol* sk = cp->klass_name_at(super_class_index);
3882 if (access_flags.is_interface()) {
3883 // Before attempting to resolve the superclass, check for class format
3884 // errors not checked yet.
3885 guarantee_property(sk == vmSymbols::java_lang_Object(),
3886 "Interfaces must have java.lang.Object as superclass in class file %s",
3887 CHECK_(nullHandle));
3888 }
3889 Klass* k = SystemDictionary::resolve_super_or_fail(class_name, sk,
3890 class_loader,
3891 protection_domain,
3892 true,
3893 CHECK_(nullHandle));
3894
3895 KlassHandle kh (THREAD, k);
3896 super_klass = instanceKlassHandle(THREAD, kh());
3897 }
3898 if (super_klass.not_null()) {
3899
3900 if (super_klass->has_default_methods()) {
3901 has_default_methods = true;
3902 }
3903
3904 if (super_klass->is_interface()) {
3905 ResourceMark rm(THREAD);
3906 Exceptions::fthrow(
3907 THREAD_AND_LOCATION,
3908 vmSymbols::java_lang_IncompatibleClassChangeError(),
3909 "class %s has interface %s as super class",
3910 class_name->as_klass_external_name(),
3911 super_klass->external_name()
3912 );
3913 return nullHandle;
3914 }
3915 // Make sure super class is not final
3916 if (super_klass->is_final()) {
3917 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
3918 }
3919 }
3920
3921 // save super klass for error handling.
3922 _super_klass = super_klass;
3923
3924 // Compute the transitive list of all unique interfaces implemented by this class
3925 _transitive_interfaces =
3926 compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
3927
3928 // sort methods
3929 intArray* method_ordering = sort_methods(methods);
3930
3931 // promote flags from parse_methods() to the klass' flags
3932 access_flags.add_promoted_flags(promoted_flags.as_int());
3933
3934 // Size of Java vtable (in words)
3935 int vtable_size = 0;
3936 int itable_size = 0;
3937 int num_miranda_methods = 0;
3938
3939 GrowableArray<Method*> all_mirandas(20);
3940
3941 klassVtable::compute_vtable_size_and_num_mirandas(
3942 &vtable_size, &num_miranda_methods, &all_mirandas, super_klass(), methods,
3943 access_flags, class_loader, class_name, local_interfaces,
3944 CHECK_(nullHandle));
3945
3946 // Size of Java itable (in words)
3947 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(_transitive_interfaces);
3948
3949 FieldLayoutInfo info;
3950 layout_fields(class_loader, &fac, &parsed_annotations, &info, CHECK_NULL);
3951
3952 int total_oop_map_size2 =
3953 InstanceKlass::nonstatic_oop_map_size(info.total_oop_map_count);
3954
3955 // Compute reference type
3956 ReferenceType rt;
3957 if (super_klass() == NULL) {
3958 rt = REF_NONE;
3959 } else {
3960 rt = super_klass->reference_type();
3961 }
3962
3963 // We can now create the basic Klass* for this klass
3964 _klass = InstanceKlass::allocate_instance_klass(loader_data,
3965 vtable_size,
3966 itable_size,
3967 info.static_field_size,
3968 total_oop_map_size2,
3969 rt,
3970 access_flags,
3971 name,
3972 super_klass(),
3973 !host_klass.is_null(),
3974 CHECK_(nullHandle));
3975 instanceKlassHandle this_klass (THREAD, _klass);
3976
3977 assert(this_klass->static_field_size() == info.static_field_size, "sanity");
3978 assert(this_klass->nonstatic_oop_map_count() == info.total_oop_map_count,
3979 "sanity");
3980
3981 // Fill in information already parsed
3982 this_klass->set_should_verify_class(verify);
3983 jint lh = Klass::instance_layout_helper(info.instance_size, false);
3984 this_klass->set_layout_helper(lh);
3985 assert(this_klass->oop_is_instance(), "layout is correct");
3986 assert(this_klass->size_helper() == info.instance_size, "correct size_helper");
3987 // Not yet: supers are done below to support the new subtype-checking fields
3988 //this_klass->set_super(super_klass());
3989 this_klass->set_class_loader_data(loader_data);
3990 this_klass->set_nonstatic_field_size(info.nonstatic_field_size);
3991 this_klass->set_has_nonstatic_fields(info.has_nonstatic_fields);
3992 this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
3993
3994 apply_parsed_class_metadata(this_klass, java_fields_count, CHECK_NULL);
3995
3996 if (has_final_method) {
3997 this_klass->set_has_final_method();
3998 }
3999 this_klass->copy_method_ordering(method_ordering, CHECK_NULL);
4000 // The InstanceKlass::_methods_jmethod_ids cache
4001 // is managed on the assumption that the initial cache
4002 // size is equal to the number of methods in the class. If
4003 // that changes, then InstanceKlass::idnum_can_increment()
4004 // has to be changed accordingly.
4005 this_klass->set_initial_method_idnum(methods->length());
4006 this_klass->set_name(cp->klass_name_at(this_class_index));
4007 if (is_anonymous()) // I am well known to myself
4008 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
4009
4010 this_klass->set_minor_version(minor_version);
4011 this_klass->set_major_version(major_version);
4012 this_klass->set_has_default_methods(has_default_methods);
4013
4014 // Set up Method*::intrinsic_id as soon as we know the names of methods.
4015 // (We used to do this lazily, but now we query it in Rewriter,
4016 // which is eagerly done for every method, so we might as well do it now,
4017 // when everything is fresh in memory.)
4018 if (Method::klass_id_for_intrinsics(this_klass()) != vmSymbols::NO_SID) {
4019 for (int j = 0; j < methods->length(); j++) {
4020 methods->at(j)->init_intrinsic_id();
4021 }
4022 }
4023
4024 if (cached_class_file != NULL) {
4025 // JVMTI: we have an InstanceKlass now, tell it about the cached bytes
4026 this_klass->set_cached_class_file(cached_class_file);
4027 }
4028
4029 // Fill in field values obtained by parse_classfile_attributes
4030 if (parsed_annotations.has_any_annotations())
4031 parsed_annotations.apply_to(this_klass);
4032 apply_parsed_class_attributes(this_klass);
4033
4034 // Miranda methods
4035 if ((num_miranda_methods > 0) ||
4036 // if this class introduced new miranda methods or
4037 (super_klass.not_null() && (super_klass->has_miranda_methods()))
4038 // super class exists and this class inherited miranda methods
4039 ) {
4040 this_klass->set_has_miranda_methods(); // then set a flag
4041 }
4042
4043 // Fill in information needed to compute superclasses.
4044 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
4045
4046 // Initialize itable offset tables
4047 klassItable::setup_itable_offset_table(this_klass);
4048
4049 // Compute transitive closure of interfaces this class implements
4050 // Do final class setup
4051 fill_oop_maps(this_klass, info.nonstatic_oop_map_count, info.nonstatic_oop_offsets, info.nonstatic_oop_counts);
4052
4053 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
4054 set_precomputed_flags(this_klass);
4055
4056 // reinitialize modifiers, using the InnerClasses attribute
4057 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
4058 this_klass->set_modifier_flags(computed_modifiers);
4059
4060 // check if this class can access its super class
4061 check_super_class_access(this_klass, CHECK_(nullHandle));
4062
4063 // check if this class can access its superinterfaces
4064 check_super_interface_access(this_klass, CHECK_(nullHandle));
4065
4066 // check if this class overrides any final method
4067 check_final_method_override(this_klass, CHECK_(nullHandle));
4068
4069 // check that if this class is an interface then it doesn't have static methods
4070 if (this_klass->is_interface()) {
4071 /* An interface in a JAVA 8 classfile can be static */
4072 if (_major_version < JAVA_8_VERSION) {
4073 check_illegal_static_method(this_klass, CHECK_(nullHandle));
4074 }
4075 }
4076
4077 // Allocate mirror and initialize static fields
4078 java_lang_Class::create_mirror(this_klass, protection_domain, CHECK_(nullHandle));
4079
4080
4081 // Generate any default methods - default methods are interface methods
4082 // that have a default implementation. This is new with Lambda project.
4083 if (has_default_methods ) {
4084 DefaultMethods::generate_default_methods(
4085 this_klass(), &all_mirandas, CHECK_(nullHandle));
4086 }
4087
4088 // Update the loader_data graph.
4089 record_defined_class_dependencies(this_klass, CHECK_NULL);
4090
4091 ClassLoadingService::notify_class_loaded(InstanceKlass::cast(this_klass()),
4092 false /* not shared class */);
4093
4094 if (TraceClassLoading) {
4095 ResourceMark rm;
4096 // print in a single call to reduce interleaving of output
4097 if (cfs->source() != NULL) {
4098 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
4099 cfs->source());
4100 } else if (class_loader.is_null()) {
4101 Klass* caller =
4102 THREAD->is_Java_thread()
4103 ? ((JavaThread*)THREAD)->security_get_caller_class(1)
4104 : NULL;
4105 // caller can be NULL, for example, during a JVMTI VM_Init hook
4106 if (caller != NULL) {
4107 tty->print("[Loaded %s by instance of %s]\n",
4108 this_klass->external_name(),
4109 InstanceKlass::cast(caller)->external_name());
4110 } else {
4111 tty->print("[Loaded %s]\n", this_klass->external_name());
4112 }
4113 } else {
4114 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
4115 InstanceKlass::cast(class_loader->klass())->external_name());
4116 }
4117 }
4118
4119 if (TraceClassResolution) {
4120 ResourceMark rm;
4121 // print out the superclass.
4122 const char * from = this_klass()->external_name();
4123 if (this_klass->java_super() != NULL) {
4124 tty->print("RESOLVE %s %s (super)\n", from, InstanceKlass::cast(this_klass->java_super())->external_name());
4125 }
4126 // print out each of the interface classes referred to by this class.
4127 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4128 if (local_interfaces != NULL) {
4129 int length = local_interfaces->length();
4130 for (int i = 0; i < length; i++) {
4131 Klass* k = local_interfaces->at(i);
4132 InstanceKlass* to_class = InstanceKlass::cast(k);
4133 const char * to = to_class->external_name();
4134 tty->print("RESOLVE %s %s (interface)\n", from, to);
4135 }
4136 }
4137 }
4138
4139 // preserve result across HandleMark
4140 preserve_this_klass = this_klass();
4141 }
4142
4143 // Create new handle outside HandleMark (might be needed for
4144 // Extended Class Redefinition)
4145 instanceKlassHandle this_klass (THREAD, preserve_this_klass);
4146 debug_only(this_klass->verify();)
4147
4148 // Clear class if no error has occurred so destructor doesn't deallocate it
4149 _klass = NULL;
4150 return this_klass;
4151 }
4152
4153 // Destructor to clean up if there's an error
4154 ClassFileParser::~ClassFileParser() {
4155 MetadataFactory::free_metadata(_loader_data, _cp);
4156 MetadataFactory::free_array<u2>(_loader_data, _fields);
4157
4158 // Free methods
4159 InstanceKlass::deallocate_methods(_loader_data, _methods);
4160
4161 // beware of the Universe::empty_blah_array!!
4162 if (_inner_classes != Universe::the_empty_short_array()) {
4163 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
4164 }
4165
4166 // Free interfaces
4167 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass(),
4168 _local_interfaces, _transitive_interfaces);
4169
4170 MetadataFactory::free_array<u1>(_loader_data, _annotations);
4171 MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
4172 Annotations::free_contents(_loader_data, _fields_annotations);
4173 Annotations::free_contents(_loader_data, _fields_type_annotations);
4174
4175 clear_class_metadata();
4176
4177 // deallocate the klass if already created.
4178 MetadataFactory::free_metadata(_loader_data, _klass);
4179 _klass = NULL;
4180 }
4181
4182 void ClassFileParser::print_field_layout(Symbol* name,
4183 Array<u2>* fields,
4184 constantPoolHandle cp,
4185 int instance_size,
4186 int instance_fields_start,
4187 int instance_fields_end,
4188 int static_fields_end) {
4189 tty->print("%s: field layout\n", name->as_klass_external_name());
4190 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
4191 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
4192 if (!fs.access_flags().is_static()) {
4193 tty->print(" @%3d \"%s\" %s\n",
4194 fs.offset(),
4195 fs.name()->as_klass_external_name(),
4196 fs.signature()->as_klass_external_name());
4197 }
4198 }
4199 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
4200 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
4201 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
4202 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
4203 if (fs.access_flags().is_static()) {
4204 tty->print(" @%3d \"%s\" %s\n",
4205 fs.offset(),
4206 fs.name()->as_klass_external_name(),
4207 fs.signature()->as_klass_external_name());
4208 }
4209 }
4210 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
4211 tty->print("\n");
4212 }
4213
4214 unsigned int
4215 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
4216 unsigned int nonstatic_oop_map_count,
4217 int first_nonstatic_oop_offset) {
4218 unsigned int map_count =
4219 super.is_null() ? 0 : super->nonstatic_oop_map_count();
4220 if (nonstatic_oop_map_count > 0) {
4221 // We have oops to add to map
4222 if (map_count == 0) {
4223 map_count = nonstatic_oop_map_count;
4224 } else {
4225 // Check whether we should add a new map block or whether the last one can
4226 // be extended
4227 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
4228 OopMapBlock* const last_map = first_map + map_count - 1;
4229
4230 int next_offset = last_map->offset() + last_map->count() * heapOopSize;
4231 if (next_offset == first_nonstatic_oop_offset) {
4232 // There is no gap bettwen superklass's last oop field and first
4233 // local oop field, merge maps.
4234 nonstatic_oop_map_count -= 1;
4235 } else {
4236 // Superklass didn't end with a oop field, add extra maps
4237 assert(next_offset < first_nonstatic_oop_offset, "just checking");
4238 }
4239 map_count += nonstatic_oop_map_count;
4240 }
4241 }
4242 return map_count;
4243 }
4244
4245
4246 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
4247 unsigned int nonstatic_oop_map_count,
4248 int* nonstatic_oop_offsets,
4249 unsigned int* nonstatic_oop_counts) {
4250 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4251 const InstanceKlass* const super = k->superklass();
4252 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4253 if (super_count > 0) {
4254 // Copy maps from superklass
4255 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4256 for (unsigned int i = 0; i < super_count; ++i) {
4257 *this_oop_map++ = *super_oop_map++;
4258 }
4259 }
4260
4261 if (nonstatic_oop_map_count > 0) {
4262 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4263 // The counts differ because there is no gap between superklass's last oop
4264 // field and the first local oop field. Extend the last oop map copied
4265 // from the superklass instead of creating new one.
4266 nonstatic_oop_map_count--;
4267 nonstatic_oop_offsets++;
4268 this_oop_map--;
4269 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4270 this_oop_map++;
4271 }
4272
4273 // Add new map blocks, fill them
4274 while (nonstatic_oop_map_count-- > 0) {
4275 this_oop_map->set_offset(*nonstatic_oop_offsets++);
4276 this_oop_map->set_count(*nonstatic_oop_counts++);
4277 this_oop_map++;
4278 }
4279 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4280 this_oop_map, "sanity");
4281 }
4282 }
4283
4284
4285 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
4286 Klass* super = k->super();
4287
4288 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4289 // in which case we don't have to register objects as finalizable
4290 if (!_has_empty_finalizer) {
4291 if (_has_finalizer ||
4292 (super != NULL && super->has_finalizer())) {
4293 k->set_has_finalizer();
4294 }
4295 }
4296
4297 #ifdef ASSERT
4298 bool f = false;
4299 Method* m = k->lookup_method(vmSymbols::finalize_method_name(),
4300 vmSymbols::void_method_signature());
4301 if (m != NULL && !m->is_empty_method()) {
4302 f = true;
4303 }
4304 assert(f == k->has_finalizer(), "inconsistent has_finalizer");
4305 #endif
4306
4307 // Check if this klass supports the java.lang.Cloneable interface
4308 if (SystemDictionary::Cloneable_klass_loaded()) {
4309 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4310 k->set_is_cloneable();
4311 }
4312 }
4313
4314 // Check if this klass has a vanilla default constructor
4315 if (super == NULL) {
4316 // java.lang.Object has empty default constructor
4317 k->set_has_vanilla_constructor();
4318 } else {
4319 if (super->has_vanilla_constructor() &&
4320 _has_vanilla_constructor) {
4321 k->set_has_vanilla_constructor();
4322 }
4323 #ifdef ASSERT
4324 bool v = false;
4325 if (super->has_vanilla_constructor()) {
4326 Method* constructor = k->find_method(vmSymbols::object_initializer_name(
4327 ), vmSymbols::void_method_signature());
4328 if (constructor != NULL && constructor->is_vanilla_constructor()) {
4329 v = true;
4330 }
4331 }
4332 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4333 #endif
4334 }
4335
4336 // If it cannot be fast-path allocated, set a bit in the layout helper.
4337 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4338 assert(k->size_helper() > 0, "layout_helper is initialized");
4339 if ((!RegisterFinalizersAtInit && k->has_finalizer())
4340 || k->is_abstract() || k->is_interface()
4341 || (k->name() == vmSymbols::java_lang_Class() && k->class_loader() == NULL)
4342 || k->size_helper() >= FastAllocateSizeLimit) {
4343 // Forbid fast-path allocation.
4344 jint lh = Klass::instance_layout_helper(k->size_helper(), true);
4345 k->set_layout_helper(lh);
4346 }
4347 }
4348
4349 // Attach super classes and interface classes to class loader data
4350 void ClassFileParser::record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS) {
4351 ClassLoaderData * defining_loader_data = defined_klass->class_loader_data();
4352 if (defining_loader_data->is_the_null_class_loader_data()) {
4353 // Dependencies to null class loader data are implicit.
4354 return;
4355 } else {
4356 // add super class dependency
4357 Klass* super = defined_klass->super();
4358 if (super != NULL) {
4359 defining_loader_data->record_dependency(super, CHECK);
4360 }
4361
4362 // add super interface dependencies
4363 Array<Klass*>* local_interfaces = defined_klass->local_interfaces();
4364 if (local_interfaces != NULL) {
4365 int length = local_interfaces->length();
4366 for (int i = 0; i < length; i++) {
4367 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4368 }
4369 }
4370 }
4371 }
4372
4373 // utility methods for appending an array with check for duplicates
4374
4375 void append_interfaces(GrowableArray<Klass*>* result, Array<Klass*>* ifs) {
4376 // iterate over new interfaces
4377 for (int i = 0; i < ifs->length(); i++) {
4378 Klass* e = ifs->at(i);
4379 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4380 // add new interface
4381 result->append_if_missing(e);
4382 }
4383 }
4384
4385 Array<Klass*>* ClassFileParser::compute_transitive_interfaces(
4386 instanceKlassHandle super,
4387 Array<Klass*>* local_ifs, TRAPS) {
4388 // Compute maximum size for transitive interfaces
4389 int max_transitive_size = 0;
4390 int super_size = 0;
4391 // Add superclass transitive interfaces size
4392 if (super.not_null()) {
4393 super_size = super->transitive_interfaces()->length();
4394 max_transitive_size += super_size;
4395 }
4396 // Add local interfaces' super interfaces
4397 int local_size = local_ifs->length();
4398 for (int i = 0; i < local_size; i++) {
4399 Klass* l = local_ifs->at(i);
4400 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4401 }
4402 // Finally add local interfaces
4403 max_transitive_size += local_size;
4404 // Construct array
4405 if (max_transitive_size == 0) {
4406 // no interfaces, use canonicalized array
4407 return Universe::the_empty_klass_array();
4408 } else if (max_transitive_size == super_size) {
4409 // no new local interfaces added, share superklass' transitive interface array
4410 return super->transitive_interfaces();
4411 } else if (max_transitive_size == local_size) {
4412 // only local interfaces added, share local interface array
4413 return local_ifs;
4414 } else {
4415 ResourceMark rm;
4416 GrowableArray<Klass*>* result = new GrowableArray<Klass*>(max_transitive_size);
4417
4418 // Copy down from superclass
4419 if (super.not_null()) {
4420 append_interfaces(result, super->transitive_interfaces());
4421 }
4422
4423 // Copy down from local interfaces' superinterfaces
4424 for (int i = 0; i < local_ifs->length(); i++) {
4425 Klass* l = local_ifs->at(i);
4426 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4427 }
4428 // Finally add local interfaces
4429 append_interfaces(result, local_ifs);
4430
4431 // length will be less than the max_transitive_size if duplicates were removed
4432 int length = result->length();
4433 assert(length <= max_transitive_size, "just checking");
4434 Array<Klass*>* new_result = MetadataFactory::new_array<Klass*>(_loader_data, length, CHECK_NULL);
4435 for (int i = 0; i < length; i++) {
4436 Klass* e = result->at(i);
4437 assert(e != NULL, "just checking");
4438 new_result->at_put(i, e);
4439 }
4440 return new_result;
4441 }
4442 }
4443
4444 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
4445 Klass* super = this_klass->super();
4446 if ((super != NULL) &&
4447 (!Reflection::verify_class_access(this_klass(), super, false))) {
4448 ResourceMark rm(THREAD);
4449 Exceptions::fthrow(
4450 THREAD_AND_LOCATION,
4451 vmSymbols::java_lang_IllegalAccessError(),
4452 "class %s cannot access its superclass %s",
4453 this_klass->external_name(),
4454 InstanceKlass::cast(super)->external_name()
4455 );
4456 return;
4457 }
4458 }
4459
4460
4461 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
4462 Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4463 int lng = local_interfaces->length();
4464 for (int i = lng - 1; i >= 0; i--) {
4465 Klass* k = local_interfaces->at(i);
4466 assert (k != NULL && k->is_interface(), "invalid interface");
4467 if (!Reflection::verify_class_access(this_klass(), k, false)) {
4468 ResourceMark rm(THREAD);
4469 Exceptions::fthrow(
4470 THREAD_AND_LOCATION,
4471 vmSymbols::java_lang_IllegalAccessError(),
4472 "class %s cannot access its superinterface %s",
4473 this_klass->external_name(),
4474 InstanceKlass::cast(k)->external_name()
4475 );
4476 return;
4477 }
4478 }
4479 }
4480
4481
4482 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
4483 Array<Method*>* methods = this_klass->methods();
4484 int num_methods = methods->length();
4485
4486 // go thru each method and check if it overrides a final method
4487 for (int index = 0; index < num_methods; index++) {
4488 Method* m = methods->at(index);
4489
4490 // skip private, static, and <init> methods
4491 if ((!m->is_private() && !m->is_static()) &&
4492 (m->name() != vmSymbols::object_initializer_name())) {
4493
4494 Symbol* name = m->name();
4495 Symbol* signature = m->signature();
4496 Klass* k = this_klass->super();
4497 Method* super_m = NULL;
4498 while (k != NULL) {
4499 // skip supers that don't have final methods.
4500 if (k->has_final_method()) {
4501 // lookup a matching method in the super class hierarchy
4502 super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4503 if (super_m == NULL) {
4504 break; // didn't find any match; get out
4505 }
4506
4507 if (super_m->is_final() && !super_m->is_static() &&
4508 // matching method in super is final, and not static
4509 (Reflection::verify_field_access(this_klass(),
4510 super_m->method_holder(),
4511 super_m->method_holder(),
4512 super_m->access_flags(), false))
4513 // this class can access super final method and therefore override
4514 ) {
4515 ResourceMark rm(THREAD);
4516 Exceptions::fthrow(
4517 THREAD_AND_LOCATION,
4518 vmSymbols::java_lang_VerifyError(),
4519 "class %s overrides final method %s.%s",
4520 this_klass->external_name(),
4521 name->as_C_string(),
4522 signature->as_C_string()
4523 );
4524 return;
4525 }
4526
4527 // continue to look from super_m's holder's super.
4528 k = super_m->method_holder()->super();
4529 continue;
4530 }
4531
4532 k = k->super();
4533 }
4534 }
4535 }
4536 }
4537
4538
4539 // assumes that this_klass is an interface
4540 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
4541 assert(this_klass->is_interface(), "not an interface");
4542 Array<Method*>* methods = this_klass->methods();
4543 int num_methods = methods->length();
4544
4545 for (int index = 0; index < num_methods; index++) {
4546 Method* m = methods->at(index);
4547 // if m is static and not the init method, throw a verify error
4548 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4549 ResourceMark rm(THREAD);
4550 Exceptions::fthrow(
4551 THREAD_AND_LOCATION,
4552 vmSymbols::java_lang_VerifyError(),
4553 "Illegal static method %s in interface %s",
4554 m->name()->as_C_string(),
4555 this_klass->external_name()
4556 );
4557 return;
4558 }
4559 }
4560 }
4561
4562 // utility methods for format checking
4563
4564 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
4565 if (!_need_verify) { return; }
4566
4567 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4568 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4569 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4570 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4571 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4572 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4573 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4574
4575 if ((is_abstract && is_final) ||
4576 (is_interface && !is_abstract) ||
4577 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4578 (!is_interface && major_gte_15 && is_annotation)) {
4579 ResourceMark rm(THREAD);
4580 Exceptions::fthrow(
4581 THREAD_AND_LOCATION,
4582 vmSymbols::java_lang_ClassFormatError(),
4583 "Illegal class modifiers in class %s: 0x%X",
4584 _class_name->as_C_string(), flags
4585 );
4586 return;
4587 }
4588 }
4589
4590 bool ClassFileParser::has_illegal_visibility(jint flags) {
4591 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4592 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4593 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4594
4595 return ((is_public && is_protected) ||
4596 (is_public && is_private) ||
4597 (is_protected && is_private));
4598 }
4599
4600 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
4601 u2 max_version =
4602 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION :
4603 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION);
4604 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4605 (major <= max_version) &&
4606 ((major != max_version) ||
4607 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4608 }
4609
4610 void ClassFileParser::verify_legal_field_modifiers(
4611 jint flags, bool is_interface, TRAPS) {
4612 if (!_need_verify) { return; }
4613
4614 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4615 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4616 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4617 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4618 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4619 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4620 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4621 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4622 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4623
4624 bool is_illegal = false;
4625
4626 if (is_interface) {
4627 if (!is_public || !is_static || !is_final || is_private ||
4628 is_protected || is_volatile || is_transient ||
4629 (major_gte_15 && is_enum)) {
4630 is_illegal = true;
4631 }
4632 } else { // not interface
4633 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4634 is_illegal = true;
4635 }
4636 }
4637
4638 if (is_illegal) {
4639 ResourceMark rm(THREAD);
4640 Exceptions::fthrow(
4641 THREAD_AND_LOCATION,
4642 vmSymbols::java_lang_ClassFormatError(),
4643 "Illegal field modifiers in class %s: 0x%X",
4644 _class_name->as_C_string(), flags);
4645 return;
4646 }
4647 }
4648
4649 void ClassFileParser::verify_legal_method_modifiers(
4650 jint flags, bool is_interface, Symbol* name, TRAPS) {
4651 if (!_need_verify) { return; }
4652
4653 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4654 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4655 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4656 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4657 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4658 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4659 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4660 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4661 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4662 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4663 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4664 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4665 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4666
4667 bool is_illegal = false;
4668
4669 if (is_interface) {
4670 if (major_gte_8) {
4671 // Class file version is JAVA_8_VERSION or later Methods of
4672 // interfaces may set any of the flags except ACC_PROTECTED,
4673 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4674 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4675 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4676 (is_native || is_protected || is_final || is_synchronized) ||
4677 // If a specific method of a class or interface has its
4678 // ACC_ABSTRACT flag set, it must not have any of its
4679 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4680 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4681 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4682 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4683 (is_abstract && (is_private || is_static || is_strict))) {
4684 is_illegal = true;
4685 }
4686 } else if (major_gte_15) {
4687 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4688 if (!is_public || is_static || is_final || is_synchronized ||
4689 is_native || !is_abstract || is_strict) {
4690 is_illegal = true;
4691 }
4692 } else {
4693 // Class file version is pre-JAVA_1_5_VERSION
4694 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4695 is_illegal = true;
4696 }
4697 }
4698 } else { // not interface
4699 if (is_initializer) {
4700 if (is_static || is_final || is_synchronized || is_native ||
4701 is_abstract || (major_gte_15 && is_bridge)) {
4702 is_illegal = true;
4703 }
4704 } else { // not initializer
4705 if (is_abstract) {
4706 if ((is_final || is_native || is_private || is_static ||
4707 (major_gte_15 && (is_synchronized || is_strict)))) {
4708 is_illegal = true;
4709 }
4710 }
4711 if (has_illegal_visibility(flags)) {
4712 is_illegal = true;
4713 }
4714 }
4715 }
4716
4717 if (is_illegal) {
4718 ResourceMark rm(THREAD);
4719 Exceptions::fthrow(
4720 THREAD_AND_LOCATION,
4721 vmSymbols::java_lang_ClassFormatError(),
4722 "Method %s in class %s has illegal modifiers: 0x%X",
4723 name->as_C_string(), _class_name->as_C_string(), flags);
4724 return;
4725 }
4726 }
4727
4728 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4729 assert(_need_verify, "only called when _need_verify is true");
4730 int i = 0;
4731 int count = length >> 2;
4732 for (int k=0; k<count; k++) {
4733 unsigned char b0 = buffer[i];
4734 unsigned char b1 = buffer[i+1];
4735 unsigned char b2 = buffer[i+2];
4736 unsigned char b3 = buffer[i+3];
4737 // For an unsigned char v,
4738 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4739 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4740 unsigned char res = b0 | b0 - 1 |
4741 b1 | b1 - 1 |
4742 b2 | b2 - 1 |
4743 b3 | b3 - 1;
4744 if (res >= 128) break;
4745 i += 4;
4746 }
4747 for(; i < length; i++) {
4748 unsigned short c;
4749 // no embedded zeros
4750 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4751 if(buffer[i] < 128) {
4752 continue;
4753 }
4754 if ((i + 5) < length) { // see if it's legal supplementary character
4755 if (UTF8::is_supplementary_character(&buffer[i])) {
4756 c = UTF8::get_supplementary_character(&buffer[i]);
4757 i += 5;
4758 continue;
4759 }
4760 }
4761 switch (buffer[i] >> 4) {
4762 default: break;
4763 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4764 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4765 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
4766 c = (buffer[i] & 0x1F) << 6;
4767 i++;
4768 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4769 c += buffer[i] & 0x3F;
4770 if (_major_version <= 47 || c == 0 || c >= 0x80) {
4771 // for classes with major > 47, c must a null or a character in its shortest form
4772 break;
4773 }
4774 }
4775 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4776 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
4777 c = (buffer[i] & 0xF) << 12;
4778 i += 2;
4779 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4780 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4781 if (_major_version <= 47 || c >= 0x800) {
4782 // for classes with major > 47, c must be in its shortest form
4783 break;
4784 }
4785 }
4786 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4787 } // end of switch
4788 } // end of for
4789 }
4790
4791 // Checks if name is a legal class name.
4792 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
4793 if (!_need_verify || _relax_verify) { return; }
4794
4795 char buf[fixed_buffer_size];
4796 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4797 unsigned int length = name->utf8_length();
4798 bool legal = false;
4799
4800 if (length > 0) {
4801 char* p;
4802 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4803 p = skip_over_field_signature(bytes, false, length, CHECK);
4804 legal = (p != NULL) && ((p - bytes) == (int)length);
4805 } else if (_major_version < JAVA_1_5_VERSION) {
4806 if (bytes[0] != '<') {
4807 p = skip_over_field_name(bytes, true, length);
4808 legal = (p != NULL) && ((p - bytes) == (int)length);
4809 }
4810 } else {
4811 // 4900761: relax the constraints based on JSR202 spec
4812 // Class names may be drawn from the entire Unicode character set.
4813 // Identifiers between '/' must be unqualified names.
4814 // The utf8 string has been verified when parsing cpool entries.
4815 legal = verify_unqualified_name(bytes, length, LegalClass);
4816 }
4817 }
4818 if (!legal) {
4819 ResourceMark rm(THREAD);
4820 Exceptions::fthrow(
4821 THREAD_AND_LOCATION,
4822 vmSymbols::java_lang_ClassFormatError(),
4823 "Illegal class name \"%s\" in class file %s", bytes,
4824 _class_name->as_C_string()
4825 );
4826 return;
4827 }
4828 }
4829
4830 // Checks if name is a legal field name.
4831 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
4832 if (!_need_verify || _relax_verify) { return; }
4833
4834 char buf[fixed_buffer_size];
4835 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4836 unsigned int length = name->utf8_length();
4837 bool legal = false;
4838
4839 if (length > 0) {
4840 if (_major_version < JAVA_1_5_VERSION) {
4841 if (bytes[0] != '<') {
4842 char* p = skip_over_field_name(bytes, false, length);
4843 legal = (p != NULL) && ((p - bytes) == (int)length);
4844 }
4845 } else {
4846 // 4881221: relax the constraints based on JSR202 spec
4847 legal = verify_unqualified_name(bytes, length, LegalField);
4848 }
4849 }
4850
4851 if (!legal) {
4852 ResourceMark rm(THREAD);
4853 Exceptions::fthrow(
4854 THREAD_AND_LOCATION,
4855 vmSymbols::java_lang_ClassFormatError(),
4856 "Illegal field name \"%s\" in class %s", bytes,
4857 _class_name->as_C_string()
4858 );
4859 return;
4860 }
4861 }
4862
4863 // Checks if name is a legal method name.
4864 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
4865 if (!_need_verify || _relax_verify) { return; }
4866
4867 assert(name != NULL, "method name is null");
4868 char buf[fixed_buffer_size];
4869 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4870 unsigned int length = name->utf8_length();
4871 bool legal = false;
4872
4873 if (length > 0) {
4874 if (bytes[0] == '<') {
4875 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4876 legal = true;
4877 }
4878 } else if (_major_version < JAVA_1_5_VERSION) {
4879 char* p;
4880 p = skip_over_field_name(bytes, false, length);
4881 legal = (p != NULL) && ((p - bytes) == (int)length);
4882 } else {
4883 // 4881221: relax the constraints based on JSR202 spec
4884 legal = verify_unqualified_name(bytes, length, LegalMethod);
4885 }
4886 }
4887
4888 if (!legal) {
4889 ResourceMark rm(THREAD);
4890 Exceptions::fthrow(
4891 THREAD_AND_LOCATION,
4892 vmSymbols::java_lang_ClassFormatError(),
4893 "Illegal method name \"%s\" in class %s", bytes,
4894 _class_name->as_C_string()
4895 );
4896 return;
4897 }
4898 }
4899
4900
4901 // Checks if signature is a legal field signature.
4902 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
4903 if (!_need_verify) { return; }
4904
4905 char buf[fixed_buffer_size];
4906 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4907 unsigned int length = signature->utf8_length();
4908 char* p = skip_over_field_signature(bytes, false, length, CHECK);
4909
4910 if (p == NULL || (p - bytes) != (int)length) {
4911 throwIllegalSignature("Field", name, signature, CHECK);
4912 }
4913 }
4914
4915 // Checks if signature is a legal method signature.
4916 // Returns number of parameters
4917 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
4918 if (!_need_verify) {
4919 // make sure caller's args_size will be less than 0 even for non-static
4920 // method so it will be recomputed in compute_size_of_parameters().
4921 return -2;
4922 }
4923
4924 unsigned int args_size = 0;
4925 char buf[fixed_buffer_size];
4926 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4927 unsigned int length = signature->utf8_length();
4928 char* nextp;
4929
4930 // The first character must be a '('
4931 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4932 length--;
4933 // Skip over legal field signatures
4934 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4935 while ((length > 0) && (nextp != NULL)) {
4936 args_size++;
4937 if (p[0] == 'J' || p[0] == 'D') {
4938 args_size++;
4939 }
4940 length -= nextp - p;
4941 p = nextp;
4942 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4943 }
4944 // The first non-signature thing better be a ')'
4945 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4946 length--;
4947 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
4948 // All internal methods must return void
4949 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
4950 return args_size;
4951 }
4952 } else {
4953 // Now we better just have a return value
4954 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4955 if (nextp && ((int)length == (nextp - p))) {
4956 return args_size;
4957 }
4958 }
4959 }
4960 }
4961 // Report error
4962 throwIllegalSignature("Method", name, signature, CHECK_0);
4963 return 0;
4964 }
4965
4966
4967 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4968 // Method names also may not contain the characters '<' or '>', unless <init>
4969 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4970 // method. Because these names have been checked as special cases before
4971 // calling this method in verify_legal_method_name.
4972 bool ClassFileParser::verify_unqualified_name(
4973 char* name, unsigned int length, int type) {
4974 jchar ch;
4975
4976 for (char* p = name; p != name + length; ) {
4977 ch = *p;
4978 if (ch < 128) {
4979 p++;
4980 if (ch == '.' || ch == ';' || ch == '[' ) {
4981 return false; // do not permit '.', ';', or '['
4982 }
4983 if (type != LegalClass && ch == '/') {
4984 return false; // do not permit '/' unless it's class name
4985 }
4986 if (type == LegalMethod && (ch == '<' || ch == '>')) {
4987 return false; // do not permit '<' or '>' in method names
4988 }
4989 } else {
4990 char* tmp_p = UTF8::next(p, &ch);
4991 p = tmp_p;
4992 }
4993 }
4994 return true;
4995 }
4996
4997
4998 // Take pointer to a string. Skip over the longest part of the string that could
4999 // be taken as a fieldname. Allow '/' if slash_ok is true.
5000 // Return a pointer to just past the fieldname.
5001 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5002 // being true, we saw consecutive slashes (meaning we were looking for a
5003 // qualified path but found something that was badly-formed).
5004 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
5005 char* p;
5006 jchar ch;
5007 jboolean last_is_slash = false;
5008 jboolean not_first_ch = false;
5009
5010 for (p = name; p != name + length; not_first_ch = true) {
5011 char* old_p = p;
5012 ch = *p;
5013 if (ch < 128) {
5014 p++;
5015 // quick check for ascii
5016 if ((ch >= 'a' && ch <= 'z') ||
5017 (ch >= 'A' && ch <= 'Z') ||
5018 (ch == '_' || ch == '$') ||
5019 (not_first_ch && ch >= '0' && ch <= '9')) {
5020 last_is_slash = false;
5021 continue;
5022 }
5023 if (slash_ok && ch == '/') {
5024 if (last_is_slash) {
5025 return NULL; // Don't permit consecutive slashes
5026 }
5027 last_is_slash = true;
5028 continue;
5029 }
5030 } else {
5031 jint unicode_ch;
5032 char* tmp_p = UTF8::next_character(p, &unicode_ch);
5033 p = tmp_p;
5034 last_is_slash = false;
5035 // Check if ch is Java identifier start or is Java identifier part
5036 // 4672820: call java.lang.Character methods directly without generating separate tables.
5037 EXCEPTION_MARK;
5038 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
5039
5040 // return value
5041 JavaValue result(T_BOOLEAN);
5042 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
5043 JavaCallArguments args;
5044 args.push_int(unicode_ch);
5045
5046 // public static boolean isJavaIdentifierStart(char ch);
5047 JavaCalls::call_static(&result,
5048 klass,
5049 vmSymbols::isJavaIdentifierStart_name(),
5050 vmSymbols::int_bool_signature(),
5051 &args,
5052 THREAD);
5053
5054 if (HAS_PENDING_EXCEPTION) {
5055 CLEAR_PENDING_EXCEPTION;
5056 return 0;
5057 }
5058 if (result.get_jboolean()) {
5059 continue;
5060 }
5061
5062 if (not_first_ch) {
5063 // public static boolean isJavaIdentifierPart(char ch);
5064 JavaCalls::call_static(&result,
5065 klass,
5066 vmSymbols::isJavaIdentifierPart_name(),
5067 vmSymbols::int_bool_signature(),
5068 &args,
5069 THREAD);
5070
5071 if (HAS_PENDING_EXCEPTION) {
5072 CLEAR_PENDING_EXCEPTION;
5073 return 0;
5074 }
5075
5076 if (result.get_jboolean()) {
5077 continue;
5078 }
5079 }
5080 }
5081 return (not_first_ch) ? old_p : NULL;
5082 }
5083 return (not_first_ch) ? p : NULL;
5084 }
5085
5086
5087 // Take pointer to a string. Skip over the longest part of the string that could
5088 // be taken as a field signature. Allow "void" if void_ok.
5089 // Return a pointer to just past the signature.
5090 // Return NULL if no legal signature is found.
5091 char* ClassFileParser::skip_over_field_signature(char* signature,
5092 bool void_ok,
5093 unsigned int length,
5094 TRAPS) {
5095 unsigned int array_dim = 0;
5096 while (length > 0) {
5097 switch (signature[0]) {
5098 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5099 case JVM_SIGNATURE_BOOLEAN:
5100 case JVM_SIGNATURE_BYTE:
5101 case JVM_SIGNATURE_CHAR:
5102 case JVM_SIGNATURE_SHORT:
5103 case JVM_SIGNATURE_INT:
5104 case JVM_SIGNATURE_FLOAT:
5105 case JVM_SIGNATURE_LONG:
5106 case JVM_SIGNATURE_DOUBLE:
5107 return signature + 1;
5108 case JVM_SIGNATURE_CLASS: {
5109 if (_major_version < JAVA_1_5_VERSION) {
5110 // Skip over the class name if one is there
5111 char* p = skip_over_field_name(signature + 1, true, --length);
5112
5113 // The next character better be a semicolon
5114 if (p && (p - signature) > 1 && p[0] == ';') {
5115 return p + 1;
5116 }
5117 } else {
5118 // 4900761: For class version > 48, any unicode is allowed in class name.
5119 length--;
5120 signature++;
5121 while (length > 0 && signature[0] != ';') {
5122 if (signature[0] == '.') {
5123 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
5124 }
5125 length--;
5126 signature++;
5127 }
5128 if (signature[0] == ';') { return signature + 1; }
5129 }
5130
5131 return NULL;
5132 }
5133 case JVM_SIGNATURE_ARRAY:
5134 array_dim++;
5135 if (array_dim > 255) {
5136 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5137 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5138 }
5139 // The rest of what's there better be a legal signature
5140 signature++;
5141 length--;
5142 void_ok = false;
5143 break;
5144
5145 default:
5146 return NULL;
5147 }
5148 }
5149 return NULL;
5150 }