Mon, 16 Jul 2012 19:50:52 -0700
Merge
1 /*
2 * Copyright (c) 1997, 2012, 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 */
25 #include "precompiled.hpp"
26 #include "classfile/classFileParser.hpp"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/verificationType.hpp"
32 #include "classfile/verifier.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "memory/allocation.hpp"
35 #include "memory/gcLocker.hpp"
36 #include "memory/oopFactory.hpp"
37 #include "memory/universe.inline.hpp"
38 #include "oops/constantPoolOop.hpp"
39 #include "oops/fieldStreams.hpp"
40 #include "oops/instanceKlass.hpp"
41 #include "oops/instanceMirrorKlass.hpp"
42 #include "oops/klass.inline.hpp"
43 #include "oops/klassOop.hpp"
44 #include "oops/klassVtable.hpp"
45 #include "oops/methodOop.hpp"
46 #include "oops/symbol.hpp"
47 #include "prims/jvmtiExport.hpp"
48 #include "prims/jvmtiThreadState.hpp"
49 #include "runtime/javaCalls.hpp"
50 #include "runtime/perfData.hpp"
51 #include "runtime/reflection.hpp"
52 #include "runtime/signature.hpp"
53 #include "runtime/timer.hpp"
54 #include "services/classLoadingService.hpp"
55 #include "services/threadService.hpp"
57 // We generally try to create the oops directly when parsing, rather than
58 // allocating temporary data structures and copying the bytes twice. A
59 // temporary area is only needed when parsing utf8 entries in the constant
60 // pool and when parsing line number tables.
62 // We add assert in debug mode when class format is not checked.
64 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
65 #define JAVA_MIN_SUPPORTED_VERSION 45
66 #define JAVA_MAX_SUPPORTED_VERSION 51
67 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
69 // Used for two backward compatibility reasons:
70 // - to check for new additions to the class file format in JDK1.5
71 // - to check for bug fixes in the format checker in JDK1.5
72 #define JAVA_1_5_VERSION 49
74 // Used for backward compatibility reasons:
75 // - to check for javac bug fixes that happened after 1.5
76 // - also used as the max version when running in jdk6
77 #define JAVA_6_VERSION 50
79 // Used for backward compatibility reasons:
80 // - to check NameAndType_info signatures more aggressively
81 #define JAVA_7_VERSION 51
84 void ClassFileParser::parse_constant_pool_entries(Handle class_loader, constantPoolHandle cp, int length, TRAPS) {
85 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
86 // this function (_current can be allocated in a register, with scalar
87 // replacement of aggregates). The _current pointer is copied back to
88 // stream() when this function returns. DON'T call another method within
89 // this method that uses stream().
90 ClassFileStream* cfs0 = stream();
91 ClassFileStream cfs1 = *cfs0;
92 ClassFileStream* cfs = &cfs1;
93 #ifdef ASSERT
94 assert(cfs->allocated_on_stack(),"should be local");
95 u1* old_current = cfs0->current();
96 #endif
98 // Used for batching symbol allocations.
99 const char* names[SymbolTable::symbol_alloc_batch_size];
100 int lengths[SymbolTable::symbol_alloc_batch_size];
101 int indices[SymbolTable::symbol_alloc_batch_size];
102 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
103 int names_count = 0;
105 // parsing Index 0 is unused
106 for (int index = 1; index < length; index++) {
107 // Each of the following case guarantees one more byte in the stream
108 // for the following tag or the access_flags following constant pool,
109 // so we don't need bounds-check for reading tag.
110 u1 tag = cfs->get_u1_fast();
111 switch (tag) {
112 case JVM_CONSTANT_Class :
113 {
114 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
115 u2 name_index = cfs->get_u2_fast();
116 cp->klass_index_at_put(index, name_index);
117 }
118 break;
119 case JVM_CONSTANT_Fieldref :
120 {
121 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
122 u2 class_index = cfs->get_u2_fast();
123 u2 name_and_type_index = cfs->get_u2_fast();
124 cp->field_at_put(index, class_index, name_and_type_index);
125 }
126 break;
127 case JVM_CONSTANT_Methodref :
128 {
129 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
130 u2 class_index = cfs->get_u2_fast();
131 u2 name_and_type_index = cfs->get_u2_fast();
132 cp->method_at_put(index, class_index, name_and_type_index);
133 }
134 break;
135 case JVM_CONSTANT_InterfaceMethodref :
136 {
137 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
138 u2 class_index = cfs->get_u2_fast();
139 u2 name_and_type_index = cfs->get_u2_fast();
140 cp->interface_method_at_put(index, class_index, name_and_type_index);
141 }
142 break;
143 case JVM_CONSTANT_String :
144 {
145 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
146 u2 string_index = cfs->get_u2_fast();
147 cp->string_index_at_put(index, string_index);
148 }
149 break;
150 case JVM_CONSTANT_MethodHandle :
151 case JVM_CONSTANT_MethodType :
152 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
153 classfile_parse_error(
154 "Class file version does not support constant tag %u in class file %s",
155 tag, CHECK);
156 }
157 if (!EnableInvokeDynamic) {
158 classfile_parse_error(
159 "This JVM does not support constant tag %u in class file %s",
160 tag, CHECK);
161 }
162 if (tag == JVM_CONSTANT_MethodHandle) {
163 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
164 u1 ref_kind = cfs->get_u1_fast();
165 u2 method_index = cfs->get_u2_fast();
166 cp->method_handle_index_at_put(index, ref_kind, method_index);
167 } else if (tag == JVM_CONSTANT_MethodType) {
168 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
169 u2 signature_index = cfs->get_u2_fast();
170 cp->method_type_index_at_put(index, signature_index);
171 } else {
172 ShouldNotReachHere();
173 }
174 break;
175 case JVM_CONSTANT_InvokeDynamic :
176 {
177 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
178 classfile_parse_error(
179 "Class file version does not support constant tag %u in class file %s",
180 tag, CHECK);
181 }
182 if (!EnableInvokeDynamic) {
183 classfile_parse_error(
184 "This JVM does not support constant tag %u in class file %s",
185 tag, CHECK);
186 }
187 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
188 u2 bootstrap_specifier_index = cfs->get_u2_fast();
189 u2 name_and_type_index = cfs->get_u2_fast();
190 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index)
191 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
192 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
193 }
194 break;
195 case JVM_CONSTANT_Integer :
196 {
197 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
198 u4 bytes = cfs->get_u4_fast();
199 cp->int_at_put(index, (jint) bytes);
200 }
201 break;
202 case JVM_CONSTANT_Float :
203 {
204 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
205 u4 bytes = cfs->get_u4_fast();
206 cp->float_at_put(index, *(jfloat*)&bytes);
207 }
208 break;
209 case JVM_CONSTANT_Long :
210 // A mangled type might cause you to overrun allocated memory
211 guarantee_property(index+1 < length,
212 "Invalid constant pool entry %u in class file %s",
213 index, CHECK);
214 {
215 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
216 u8 bytes = cfs->get_u8_fast();
217 cp->long_at_put(index, bytes);
218 }
219 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
220 break;
221 case JVM_CONSTANT_Double :
222 // A mangled type might cause you to overrun allocated memory
223 guarantee_property(index+1 < length,
224 "Invalid constant pool entry %u in class file %s",
225 index, CHECK);
226 {
227 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
228 u8 bytes = cfs->get_u8_fast();
229 cp->double_at_put(index, *(jdouble*)&bytes);
230 }
231 index++; // Skip entry following eigth-byte constant, see JVM book p. 98
232 break;
233 case JVM_CONSTANT_NameAndType :
234 {
235 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
236 u2 name_index = cfs->get_u2_fast();
237 u2 signature_index = cfs->get_u2_fast();
238 cp->name_and_type_at_put(index, name_index, signature_index);
239 }
240 break;
241 case JVM_CONSTANT_Utf8 :
242 {
243 cfs->guarantee_more(2, CHECK); // utf8_length
244 u2 utf8_length = cfs->get_u2_fast();
245 u1* utf8_buffer = cfs->get_u1_buffer();
246 assert(utf8_buffer != NULL, "null utf8 buffer");
247 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
248 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
249 cfs->skip_u1_fast(utf8_length);
251 // Before storing the symbol, make sure it's legal
252 if (_need_verify) {
253 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
254 }
256 if (EnableInvokeDynamic && has_cp_patch_at(index)) {
257 Handle patch = clear_cp_patch_at(index);
258 guarantee_property(java_lang_String::is_instance(patch()),
259 "Illegal utf8 patch at %d in class file %s",
260 index, CHECK);
261 char* str = java_lang_String::as_utf8_string(patch());
262 // (could use java_lang_String::as_symbol instead, but might as well batch them)
263 utf8_buffer = (u1*) str;
264 utf8_length = (int) strlen(str);
265 }
267 unsigned int hash;
268 Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
269 if (result == NULL) {
270 names[names_count] = (char*)utf8_buffer;
271 lengths[names_count] = utf8_length;
272 indices[names_count] = index;
273 hashValues[names_count++] = hash;
274 if (names_count == SymbolTable::symbol_alloc_batch_size) {
275 SymbolTable::new_symbols(class_loader, cp, names_count, names, lengths, indices, hashValues, CHECK);
276 names_count = 0;
277 }
278 } else {
279 cp->symbol_at_put(index, result);
280 }
281 }
282 break;
283 default:
284 classfile_parse_error(
285 "Unknown constant tag %u in class file %s", tag, CHECK);
286 break;
287 }
288 }
290 // Allocate the remaining symbols
291 if (names_count > 0) {
292 SymbolTable::new_symbols(class_loader, cp, names_count, names, lengths, indices, hashValues, CHECK);
293 }
295 // Copy _current pointer of local copy back to stream().
296 #ifdef ASSERT
297 assert(cfs0->current() == old_current, "non-exclusive use of stream()");
298 #endif
299 cfs0->set_current(cfs1.current());
300 }
302 // This class unreferences constant pool symbols if an error has occurred
303 // while parsing the class before it is assigned into the class.
304 // If it gets an error after that it is unloaded and the constant pool will
305 // be cleaned up then.
306 class ConstantPoolCleaner : public StackObj {
307 constantPoolHandle _cphandle;
308 bool _in_error;
309 public:
310 ConstantPoolCleaner(constantPoolHandle cp) : _cphandle(cp), _in_error(true) {}
311 ~ConstantPoolCleaner() {
312 if (_in_error && _cphandle.not_null()) {
313 _cphandle->unreference_symbols();
314 }
315 }
316 void set_in_error(bool clean) { _in_error = clean; }
317 };
319 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
321 inline Symbol* check_symbol_at(constantPoolHandle cp, int index) {
322 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8())
323 return cp->symbol_at(index);
324 else
325 return NULL;
326 }
328 constantPoolHandle ClassFileParser::parse_constant_pool(Handle class_loader, TRAPS) {
329 ClassFileStream* cfs = stream();
330 constantPoolHandle nullHandle;
332 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
333 u2 length = cfs->get_u2_fast();
334 guarantee_property(
335 length >= 1, "Illegal constant pool size %u in class file %s",
336 length, CHECK_(nullHandle));
337 constantPoolOop constant_pool =
338 oopFactory::new_constantPool(length,
339 oopDesc::IsSafeConc,
340 CHECK_(nullHandle));
341 constantPoolHandle cp (THREAD, constant_pool);
343 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops
344 ConstantPoolCleaner cp_in_error(cp); // set constant pool to be cleaned up.
346 // parsing constant pool entries
347 parse_constant_pool_entries(class_loader, cp, length, CHECK_(nullHandle));
349 int index = 1; // declared outside of loops for portability
351 // first verification pass - validate cross references and fixup class and string constants
352 for (index = 1; index < length; index++) { // Index 0 is unused
353 jbyte tag = cp->tag_at(index).value();
354 switch (tag) {
355 case JVM_CONSTANT_Class :
356 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
357 break;
358 case JVM_CONSTANT_Fieldref :
359 // fall through
360 case JVM_CONSTANT_Methodref :
361 // fall through
362 case JVM_CONSTANT_InterfaceMethodref : {
363 if (!_need_verify) break;
364 int klass_ref_index = cp->klass_ref_index_at(index);
365 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
366 check_property(valid_cp_range(klass_ref_index, length) &&
367 is_klass_reference(cp, klass_ref_index),
368 "Invalid constant pool index %u in class file %s",
369 klass_ref_index,
370 CHECK_(nullHandle));
371 check_property(valid_cp_range(name_and_type_ref_index, length) &&
372 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
373 "Invalid constant pool index %u in class file %s",
374 name_and_type_ref_index,
375 CHECK_(nullHandle));
376 break;
377 }
378 case JVM_CONSTANT_String :
379 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
380 break;
381 case JVM_CONSTANT_Integer :
382 break;
383 case JVM_CONSTANT_Float :
384 break;
385 case JVM_CONSTANT_Long :
386 case JVM_CONSTANT_Double :
387 index++;
388 check_property(
389 (index < length && cp->tag_at(index).is_invalid()),
390 "Improper constant pool long/double index %u in class file %s",
391 index, CHECK_(nullHandle));
392 break;
393 case JVM_CONSTANT_NameAndType : {
394 if (!_need_verify) break;
395 int name_ref_index = cp->name_ref_index_at(index);
396 int signature_ref_index = cp->signature_ref_index_at(index);
397 check_property(
398 valid_cp_range(name_ref_index, length) &&
399 cp->tag_at(name_ref_index).is_utf8(),
400 "Invalid constant pool index %u in class file %s",
401 name_ref_index, CHECK_(nullHandle));
402 check_property(
403 valid_cp_range(signature_ref_index, length) &&
404 cp->tag_at(signature_ref_index).is_utf8(),
405 "Invalid constant pool index %u in class file %s",
406 signature_ref_index, CHECK_(nullHandle));
407 break;
408 }
409 case JVM_CONSTANT_Utf8 :
410 break;
411 case JVM_CONSTANT_UnresolvedClass : // fall-through
412 case JVM_CONSTANT_UnresolvedClassInError:
413 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
414 break;
415 case JVM_CONSTANT_ClassIndex :
416 {
417 int class_index = cp->klass_index_at(index);
418 check_property(
419 valid_cp_range(class_index, length) &&
420 cp->tag_at(class_index).is_utf8(),
421 "Invalid constant pool index %u in class file %s",
422 class_index, CHECK_(nullHandle));
423 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
424 }
425 break;
426 case JVM_CONSTANT_UnresolvedString :
427 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
428 break;
429 case JVM_CONSTANT_StringIndex :
430 {
431 int string_index = cp->string_index_at(index);
432 check_property(
433 valid_cp_range(string_index, length) &&
434 cp->tag_at(string_index).is_utf8(),
435 "Invalid constant pool index %u in class file %s",
436 string_index, CHECK_(nullHandle));
437 Symbol* sym = cp->symbol_at(string_index);
438 cp->unresolved_string_at_put(index, sym);
439 }
440 break;
441 case JVM_CONSTANT_MethodHandle :
442 {
443 int ref_index = cp->method_handle_index_at(index);
444 check_property(
445 valid_cp_range(ref_index, length) &&
446 EnableInvokeDynamic,
447 "Invalid constant pool index %u in class file %s",
448 ref_index, CHECK_(nullHandle));
449 constantTag tag = cp->tag_at(ref_index);
450 int ref_kind = cp->method_handle_ref_kind_at(index);
451 switch (ref_kind) {
452 case JVM_REF_getField:
453 case JVM_REF_getStatic:
454 case JVM_REF_putField:
455 case JVM_REF_putStatic:
456 check_property(
457 tag.is_field(),
458 "Invalid constant pool index %u in class file %s (not a field)",
459 ref_index, CHECK_(nullHandle));
460 break;
461 case JVM_REF_invokeVirtual:
462 case JVM_REF_invokeStatic:
463 case JVM_REF_invokeSpecial:
464 case JVM_REF_newInvokeSpecial:
465 check_property(
466 tag.is_method(),
467 "Invalid constant pool index %u in class file %s (not a method)",
468 ref_index, CHECK_(nullHandle));
469 break;
470 case JVM_REF_invokeInterface:
471 check_property(
472 tag.is_interface_method(),
473 "Invalid constant pool index %u in class file %s (not an interface method)",
474 ref_index, CHECK_(nullHandle));
475 break;
476 default:
477 classfile_parse_error(
478 "Bad method handle kind at constant pool index %u in class file %s",
479 index, CHECK_(nullHandle));
480 }
481 // Keep the ref_index unchanged. It will be indirected at link-time.
482 }
483 break;
484 case JVM_CONSTANT_MethodType :
485 {
486 int ref_index = cp->method_type_index_at(index);
487 check_property(
488 valid_cp_range(ref_index, length) &&
489 cp->tag_at(ref_index).is_utf8() &&
490 EnableInvokeDynamic,
491 "Invalid constant pool index %u in class file %s",
492 ref_index, CHECK_(nullHandle));
493 }
494 break;
495 case JVM_CONSTANT_InvokeDynamic :
496 {
497 int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index);
498 check_property(valid_cp_range(name_and_type_ref_index, length) &&
499 cp->tag_at(name_and_type_ref_index).is_name_and_type(),
500 "Invalid constant pool index %u in class file %s",
501 name_and_type_ref_index,
502 CHECK_(nullHandle));
503 // bootstrap specifier index must be checked later, when BootstrapMethods attr is available
504 break;
505 }
506 default:
507 fatal(err_msg("bad constant pool tag value %u",
508 cp->tag_at(index).value()));
509 ShouldNotReachHere();
510 break;
511 } // end of switch
512 } // end of for
514 if (_cp_patches != NULL) {
515 // need to treat this_class specially...
516 assert(EnableInvokeDynamic, "");
517 int this_class_index;
518 {
519 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
520 u1* mark = cfs->current();
521 u2 flags = cfs->get_u2_fast();
522 this_class_index = cfs->get_u2_fast();
523 cfs->set_current(mark); // revert to mark
524 }
526 for (index = 1; index < length; index++) { // Index 0 is unused
527 if (has_cp_patch_at(index)) {
528 guarantee_property(index != this_class_index,
529 "Illegal constant pool patch to self at %d in class file %s",
530 index, CHECK_(nullHandle));
531 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
532 }
533 }
534 // Ensure that all the patches have been used.
535 for (index = 0; index < _cp_patches->length(); index++) {
536 guarantee_property(!has_cp_patch_at(index),
537 "Unused constant pool patch at %d in class file %s",
538 index, CHECK_(nullHandle));
539 }
540 }
542 if (!_need_verify) {
543 cp_in_error.set_in_error(false);
544 return cp;
545 }
547 // second verification pass - checks the strings are of the right format.
548 // but not yet to the other entries
549 for (index = 1; index < length; index++) {
550 jbyte tag = cp->tag_at(index).value();
551 switch (tag) {
552 case JVM_CONSTANT_UnresolvedClass: {
553 Symbol* class_name = cp->unresolved_klass_at(index);
554 // check the name, even if _cp_patches will overwrite it
555 verify_legal_class_name(class_name, CHECK_(nullHandle));
556 break;
557 }
558 case JVM_CONSTANT_NameAndType: {
559 if (_need_verify && _major_version >= JAVA_7_VERSION) {
560 int sig_index = cp->signature_ref_index_at(index);
561 int name_index = cp->name_ref_index_at(index);
562 Symbol* name = cp->symbol_at(name_index);
563 Symbol* sig = cp->symbol_at(sig_index);
564 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
565 verify_legal_method_signature(name, sig, CHECK_(nullHandle));
566 } else {
567 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
568 }
569 }
570 break;
571 }
572 case JVM_CONSTANT_InvokeDynamic:
573 case JVM_CONSTANT_Fieldref:
574 case JVM_CONSTANT_Methodref:
575 case JVM_CONSTANT_InterfaceMethodref: {
576 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
577 // already verified to be utf8
578 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
579 // already verified to be utf8
580 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
581 Symbol* name = cp->symbol_at(name_ref_index);
582 Symbol* signature = cp->symbol_at(signature_ref_index);
583 if (tag == JVM_CONSTANT_Fieldref) {
584 verify_legal_field_name(name, CHECK_(nullHandle));
585 if (_need_verify && _major_version >= JAVA_7_VERSION) {
586 // Signature is verified above, when iterating NameAndType_info.
587 // Need only to be sure it's the right type.
588 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
589 throwIllegalSignature(
590 "Field", name, signature, CHECK_(nullHandle));
591 }
592 } else {
593 verify_legal_field_signature(name, signature, CHECK_(nullHandle));
594 }
595 } else {
596 verify_legal_method_name(name, CHECK_(nullHandle));
597 if (_need_verify && _major_version >= JAVA_7_VERSION) {
598 // Signature is verified above, when iterating NameAndType_info.
599 // Need only to be sure it's the right type.
600 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
601 throwIllegalSignature(
602 "Method", name, signature, CHECK_(nullHandle));
603 }
604 } else {
605 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
606 }
607 if (tag == JVM_CONSTANT_Methodref) {
608 // 4509014: If a class method name begins with '<', it must be "<init>".
609 assert(name != NULL, "method name in constant pool is null");
610 unsigned int name_len = name->utf8_length();
611 assert(name_len > 0, "bad method name"); // already verified as legal name
612 if (name->byte_at(0) == '<') {
613 if (name != vmSymbols::object_initializer_name()) {
614 classfile_parse_error(
615 "Bad method name at constant pool index %u in class file %s",
616 name_ref_index, CHECK_(nullHandle));
617 }
618 }
619 }
620 }
621 break;
622 }
623 case JVM_CONSTANT_MethodHandle: {
624 int ref_index = cp->method_handle_index_at(index);
625 int ref_kind = cp->method_handle_ref_kind_at(index);
626 switch (ref_kind) {
627 case JVM_REF_invokeVirtual:
628 case JVM_REF_invokeStatic:
629 case JVM_REF_invokeSpecial:
630 case JVM_REF_newInvokeSpecial:
631 {
632 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index);
633 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
634 Symbol* name = cp->symbol_at(name_ref_index);
635 if (ref_kind == JVM_REF_newInvokeSpecial) {
636 if (name != vmSymbols::object_initializer_name()) {
637 classfile_parse_error(
638 "Bad constructor name at constant pool index %u in class file %s",
639 name_ref_index, CHECK_(nullHandle));
640 }
641 } else {
642 if (name == vmSymbols::object_initializer_name()) {
643 classfile_parse_error(
644 "Bad method name at constant pool index %u in class file %s",
645 name_ref_index, CHECK_(nullHandle));
646 }
647 }
648 }
649 break;
650 // Other ref_kinds are already fully checked in previous pass.
651 }
652 break;
653 }
654 case JVM_CONSTANT_MethodType: {
655 Symbol* no_name = vmSymbols::type_name(); // place holder
656 Symbol* signature = cp->method_type_signature_at(index);
657 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
658 break;
659 }
660 case JVM_CONSTANT_Utf8: {
661 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
662 }
663 } // end of switch
664 } // end of for
666 cp_in_error.set_in_error(false);
667 return cp;
668 }
671 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) {
672 assert(EnableInvokeDynamic, "");
673 BasicType patch_type = T_VOID;
674 switch (cp->tag_at(index).value()) {
676 case JVM_CONSTANT_UnresolvedClass :
677 // Patching a class means pre-resolving it.
678 // The name in the constant pool is ignored.
679 if (java_lang_Class::is_instance(patch())) {
680 guarantee_property(!java_lang_Class::is_primitive(patch()),
681 "Illegal class patch at %d in class file %s",
682 index, CHECK);
683 cp->klass_at_put(index, java_lang_Class::as_klassOop(patch()));
684 } else {
685 guarantee_property(java_lang_String::is_instance(patch()),
686 "Illegal class patch at %d in class file %s",
687 index, CHECK);
688 Symbol* name = java_lang_String::as_symbol(patch(), CHECK);
689 cp->unresolved_klass_at_put(index, name);
690 }
691 break;
693 case JVM_CONSTANT_UnresolvedString :
694 // Patching a string means pre-resolving it.
695 // The spelling in the constant pool is ignored.
696 // The constant reference may be any object whatever.
697 // If it is not a real interned string, the constant is referred
698 // to as a "pseudo-string", and must be presented to the CP
699 // explicitly, because it may require scavenging.
700 cp->pseudo_string_at_put(index, patch());
701 break;
703 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim;
704 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim;
705 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim;
706 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim;
707 patch_prim:
708 {
709 jvalue value;
710 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
711 guarantee_property(value_type == patch_type,
712 "Illegal primitive patch at %d in class file %s",
713 index, CHECK);
714 switch (value_type) {
715 case T_INT: cp->int_at_put(index, value.i); break;
716 case T_FLOAT: cp->float_at_put(index, value.f); break;
717 case T_LONG: cp->long_at_put(index, value.j); break;
718 case T_DOUBLE: cp->double_at_put(index, value.d); break;
719 default: assert(false, "");
720 }
721 }
722 break;
724 default:
725 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
726 guarantee_property(!has_cp_patch_at(index),
727 "Illegal unexpected patch at %d in class file %s",
728 index, CHECK);
729 return;
730 }
732 // On fall-through, mark the patch as used.
733 clear_cp_patch_at(index);
734 }
738 class NameSigHash: public ResourceObj {
739 public:
740 Symbol* _name; // name
741 Symbol* _sig; // signature
742 NameSigHash* _next; // Next entry in hash table
743 };
746 #define HASH_ROW_SIZE 256
748 unsigned int hash(Symbol* name, Symbol* sig) {
749 unsigned int raw_hash = 0;
750 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
751 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
753 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
754 }
757 void initialize_hashtable(NameSigHash** table) {
758 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
759 }
761 // Return false if the name/sig combination is found in table.
762 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
763 // The old format checker uses heap sort to find duplicates.
764 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
765 // of table since we don't expect Symbol*'s to move.
766 bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) {
767 assert(name != NULL, "name in constant pool is NULL");
769 // First lookup for duplicates
770 int index = hash(name, sig);
771 NameSigHash* entry = table[index];
772 while (entry != NULL) {
773 if (entry->_name == name && entry->_sig == sig) {
774 return false;
775 }
776 entry = entry->_next;
777 }
779 // No duplicate is found, allocate a new entry and fill it.
780 entry = new NameSigHash();
781 entry->_name = name;
782 entry->_sig = sig;
784 // Insert into hash table
785 entry->_next = table[index];
786 table[index] = entry;
788 return true;
789 }
792 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp,
793 int length,
794 Handle class_loader,
795 Handle protection_domain,
796 Symbol* class_name,
797 TRAPS) {
798 ClassFileStream* cfs = stream();
799 assert(length > 0, "only called for length>0");
800 objArrayHandle nullHandle;
801 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
802 objArrayHandle interfaces (THREAD, interface_oop);
804 int index;
805 for (index = 0; index < length; index++) {
806 u2 interface_index = cfs->get_u2(CHECK_(nullHandle));
807 KlassHandle interf;
808 check_property(
809 valid_cp_range(interface_index, cp->length()) &&
810 is_klass_reference(cp, interface_index),
811 "Interface name has bad constant pool index %u in class file %s",
812 interface_index, CHECK_(nullHandle));
813 if (cp->tag_at(interface_index).is_klass()) {
814 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
815 } else {
816 Symbol* unresolved_klass = cp->klass_name_at(interface_index);
818 // Don't need to check legal name because it's checked when parsing constant pool.
819 // But need to make sure it's not an array type.
820 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
821 "Bad interface name in class file %s", CHECK_(nullHandle));
823 // Call resolve_super so classcircularity is checked
824 klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
825 unresolved_klass, class_loader, protection_domain,
826 false, CHECK_(nullHandle));
827 interf = KlassHandle(THREAD, k);
829 if (LinkWellKnownClasses) // my super type is well known to me
830 cp->klass_at_put(interface_index, interf()); // eagerly resolve
831 }
833 if (!Klass::cast(interf())->is_interface()) {
834 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle);
835 }
836 interfaces->obj_at_put(index, interf());
837 }
839 if (!_need_verify || length <= 1) {
840 return interfaces;
841 }
843 // Check if there's any duplicates in interfaces
844 ResourceMark rm(THREAD);
845 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
846 THREAD, NameSigHash*, HASH_ROW_SIZE);
847 initialize_hashtable(interface_names);
848 bool dup = false;
849 {
850 debug_only(No_Safepoint_Verifier nsv;)
851 for (index = 0; index < length; index++) {
852 klassOop k = (klassOop)interfaces->obj_at(index);
853 Symbol* name = instanceKlass::cast(k)->name();
854 // If no duplicates, add (name, NULL) in hashtable interface_names.
855 if (!put_after_lookup(name, NULL, interface_names)) {
856 dup = true;
857 break;
858 }
859 }
860 }
861 if (dup) {
862 classfile_parse_error("Duplicate interface name in class file %s",
863 CHECK_(nullHandle));
864 }
866 return interfaces;
867 }
870 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) {
871 // Make sure the constant pool entry is of a type appropriate to this field
872 guarantee_property(
873 (constantvalue_index > 0 &&
874 constantvalue_index < cp->length()),
875 "Bad initial value index %u in ConstantValue attribute in class file %s",
876 constantvalue_index, CHECK);
877 constantTag value_type = cp->tag_at(constantvalue_index);
878 switch ( cp->basic_type_for_signature_at(signature_index) ) {
879 case T_LONG:
880 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
881 break;
882 case T_FLOAT:
883 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
884 break;
885 case T_DOUBLE:
886 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
887 break;
888 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
889 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
890 break;
891 case T_OBJECT:
892 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
893 && (value_type.is_string() || value_type.is_unresolved_string())),
894 "Bad string initial value in class file %s", CHECK);
895 break;
896 default:
897 classfile_parse_error(
898 "Unable to set initial value %u in class file %s",
899 constantvalue_index, CHECK);
900 }
901 }
904 // Parse attributes for a field.
905 void ClassFileParser::parse_field_attributes(constantPoolHandle cp,
906 u2 attributes_count,
907 bool is_static, u2 signature_index,
908 u2* constantvalue_index_addr,
909 bool* is_synthetic_addr,
910 u2* generic_signature_index_addr,
911 typeArrayHandle* field_annotations,
912 ClassFileParser::FieldAnnotationCollector* parsed_annotations,
913 TRAPS) {
914 ClassFileStream* cfs = stream();
915 assert(attributes_count > 0, "length should be greater than 0");
916 u2 constantvalue_index = 0;
917 u2 generic_signature_index = 0;
918 bool is_synthetic = false;
919 u1* runtime_visible_annotations = NULL;
920 int runtime_visible_annotations_length = 0;
921 u1* runtime_invisible_annotations = NULL;
922 int runtime_invisible_annotations_length = 0;
923 while (attributes_count--) {
924 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
925 u2 attribute_name_index = cfs->get_u2_fast();
926 u4 attribute_length = cfs->get_u4_fast();
927 check_property(valid_cp_range(attribute_name_index, cp->length()) &&
928 cp->tag_at(attribute_name_index).is_utf8(),
929 "Invalid field attribute index %u in class file %s",
930 attribute_name_index,
931 CHECK);
932 Symbol* attribute_name = cp->symbol_at(attribute_name_index);
933 if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
934 // ignore if non-static
935 if (constantvalue_index != 0) {
936 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
937 }
938 check_property(
939 attribute_length == 2,
940 "Invalid ConstantValue field attribute length %u in class file %s",
941 attribute_length, CHECK);
942 constantvalue_index = cfs->get_u2(CHECK);
943 if (_need_verify) {
944 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK);
945 }
946 } else if (attribute_name == vmSymbols::tag_synthetic()) {
947 if (attribute_length != 0) {
948 classfile_parse_error(
949 "Invalid Synthetic field attribute length %u in class file %s",
950 attribute_length, CHECK);
951 }
952 is_synthetic = true;
953 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
954 if (attribute_length != 0) {
955 classfile_parse_error(
956 "Invalid Deprecated field attribute length %u in class file %s",
957 attribute_length, CHECK);
958 }
959 } else if (_major_version >= JAVA_1_5_VERSION) {
960 if (attribute_name == vmSymbols::tag_signature()) {
961 if (attribute_length != 2) {
962 classfile_parse_error(
963 "Wrong size %u for field's Signature attribute in class file %s",
964 attribute_length, CHECK);
965 }
966 generic_signature_index = cfs->get_u2(CHECK);
967 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
968 runtime_visible_annotations_length = attribute_length;
969 runtime_visible_annotations = cfs->get_u1_buffer();
970 assert(runtime_visible_annotations != NULL, "null visible annotations");
971 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
972 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
973 runtime_invisible_annotations_length = attribute_length;
974 runtime_invisible_annotations = cfs->get_u1_buffer();
975 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
976 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
977 } else {
978 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
979 }
980 } else {
981 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
982 }
983 }
985 *constantvalue_index_addr = constantvalue_index;
986 *is_synthetic_addr = is_synthetic;
987 *generic_signature_index_addr = generic_signature_index;
988 *field_annotations = assemble_annotations(runtime_visible_annotations,
989 runtime_visible_annotations_length,
990 runtime_invisible_annotations,
991 runtime_invisible_annotations_length,
992 CHECK);
993 return;
994 }
997 // Field allocation types. Used for computing field offsets.
999 enum FieldAllocationType {
1000 STATIC_OOP, // Oops
1001 STATIC_BYTE, // Boolean, Byte, char
1002 STATIC_SHORT, // shorts
1003 STATIC_WORD, // ints
1004 STATIC_DOUBLE, // aligned long or double
1005 NONSTATIC_OOP,
1006 NONSTATIC_BYTE,
1007 NONSTATIC_SHORT,
1008 NONSTATIC_WORD,
1009 NONSTATIC_DOUBLE,
1010 MAX_FIELD_ALLOCATION_TYPE,
1011 BAD_ALLOCATION_TYPE = -1
1012 };
1014 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1015 BAD_ALLOCATION_TYPE, // 0
1016 BAD_ALLOCATION_TYPE, // 1
1017 BAD_ALLOCATION_TYPE, // 2
1018 BAD_ALLOCATION_TYPE, // 3
1019 NONSTATIC_BYTE , // T_BOOLEAN = 4,
1020 NONSTATIC_SHORT, // T_CHAR = 5,
1021 NONSTATIC_WORD, // T_FLOAT = 6,
1022 NONSTATIC_DOUBLE, // T_DOUBLE = 7,
1023 NONSTATIC_BYTE, // T_BYTE = 8,
1024 NONSTATIC_SHORT, // T_SHORT = 9,
1025 NONSTATIC_WORD, // T_INT = 10,
1026 NONSTATIC_DOUBLE, // T_LONG = 11,
1027 NONSTATIC_OOP, // T_OBJECT = 12,
1028 NONSTATIC_OOP, // T_ARRAY = 13,
1029 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1030 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1031 BAD_ALLOCATION_TYPE, // T_NARROWOOP= 16,
1032 BAD_ALLOCATION_TYPE, // T_CONFLICT = 17,
1033 BAD_ALLOCATION_TYPE, // 0
1034 BAD_ALLOCATION_TYPE, // 1
1035 BAD_ALLOCATION_TYPE, // 2
1036 BAD_ALLOCATION_TYPE, // 3
1037 STATIC_BYTE , // T_BOOLEAN = 4,
1038 STATIC_SHORT, // T_CHAR = 5,
1039 STATIC_WORD, // T_FLOAT = 6,
1040 STATIC_DOUBLE, // T_DOUBLE = 7,
1041 STATIC_BYTE, // T_BYTE = 8,
1042 STATIC_SHORT, // T_SHORT = 9,
1043 STATIC_WORD, // T_INT = 10,
1044 STATIC_DOUBLE, // T_LONG = 11,
1045 STATIC_OOP, // T_OBJECT = 12,
1046 STATIC_OOP, // T_ARRAY = 13,
1047 BAD_ALLOCATION_TYPE, // T_VOID = 14,
1048 BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
1049 BAD_ALLOCATION_TYPE, // T_NARROWOOP= 16,
1050 BAD_ALLOCATION_TYPE, // T_CONFLICT = 17,
1051 };
1053 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1054 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1055 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1056 assert(result != BAD_ALLOCATION_TYPE, "bad type");
1057 return result;
1058 }
1060 class FieldAllocationCount: public ResourceObj {
1061 public:
1062 u2 count[MAX_FIELD_ALLOCATION_TYPE];
1064 FieldAllocationCount() {
1065 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1066 count[i] = 0;
1067 }
1068 }
1070 FieldAllocationType update(bool is_static, BasicType type) {
1071 FieldAllocationType atype = basic_type_to_atype(is_static, type);
1072 // Make sure there is no overflow with injected fields.
1073 assert(count[atype] < 0xFFFF, "More than 65535 fields");
1074 count[atype]++;
1075 return atype;
1076 }
1077 };
1080 typeArrayHandle ClassFileParser::parse_fields(Symbol* class_name,
1081 constantPoolHandle cp, bool is_interface,
1082 FieldAllocationCount *fac,
1083 objArrayHandle* fields_annotations,
1084 u2* java_fields_count_ptr, TRAPS) {
1085 ClassFileStream* cfs = stream();
1086 typeArrayHandle nullHandle;
1087 cfs->guarantee_more(2, CHECK_(nullHandle)); // length
1088 u2 length = cfs->get_u2_fast();
1089 *java_fields_count_ptr = length;
1091 int num_injected = 0;
1092 InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected);
1093 int total_fields = length + num_injected;
1095 // The field array starts with tuples of shorts
1096 // [access, name index, sig index, initial value index, byte offset].
1097 // A generic signature slot only exists for field with generic
1098 // signature attribute. And the access flag is set with
1099 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1100 // signature slots are at the end of the field array and after all
1101 // other fields data.
1102 //
1103 // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1104 // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1105 // ...
1106 // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1107 // [generic signature index]
1108 // [generic signature index]
1109 // ...
1110 //
1111 // Allocate a temporary resource array for field data. For each field,
1112 // a slot is reserved in the temporary array for the generic signature
1113 // index. After parsing all fields, the data are copied to a permanent
1114 // array and any unused slots will be discarded.
1115 ResourceMark rm(THREAD);
1116 u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD(
1117 THREAD, u2, total_fields * (FieldInfo::field_slots + 1));
1119 typeArrayHandle field_annotations;
1120 // The generic signature slots start after all other fields' data.
1121 int generic_signature_slot = total_fields * FieldInfo::field_slots;
1122 int num_generic_signature = 0;
1123 for (int n = 0; n < length; n++) {
1124 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1126 AccessFlags access_flags;
1127 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1128 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle));
1129 access_flags.set_flags(flags);
1131 u2 name_index = cfs->get_u2_fast();
1132 int cp_size = cp->length();
1133 check_property(
1134 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
1135 "Invalid constant pool index %u for field name in class file %s",
1136 name_index, CHECK_(nullHandle));
1137 Symbol* name = cp->symbol_at(name_index);
1138 verify_legal_field_name(name, CHECK_(nullHandle));
1140 u2 signature_index = cfs->get_u2_fast();
1141 check_property(
1142 valid_cp_range(signature_index, cp_size) &&
1143 cp->tag_at(signature_index).is_utf8(),
1144 "Invalid constant pool index %u for field signature in class file %s",
1145 signature_index, CHECK_(nullHandle));
1146 Symbol* sig = cp->symbol_at(signature_index);
1147 verify_legal_field_signature(name, sig, CHECK_(nullHandle));
1149 u2 constantvalue_index = 0;
1150 bool is_synthetic = false;
1151 u2 generic_signature_index = 0;
1152 bool is_static = access_flags.is_static();
1153 FieldAnnotationCollector parsed_annotations;
1155 u2 attributes_count = cfs->get_u2_fast();
1156 if (attributes_count > 0) {
1157 parse_field_attributes(cp, attributes_count, is_static, signature_index,
1158 &constantvalue_index, &is_synthetic,
1159 &generic_signature_index, &field_annotations,
1160 &parsed_annotations,
1161 CHECK_(nullHandle));
1162 if (field_annotations.not_null()) {
1163 if (fields_annotations->is_null()) {
1164 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1165 *fields_annotations = objArrayHandle(THREAD, md);
1166 }
1167 (*fields_annotations)->obj_at_put(n, field_annotations());
1168 }
1169 if (is_synthetic) {
1170 access_flags.set_is_synthetic();
1171 }
1172 if (generic_signature_index != 0) {
1173 access_flags.set_field_has_generic_signature();
1174 fa[generic_signature_slot] = generic_signature_index;
1175 generic_signature_slot ++;
1176 num_generic_signature ++;
1177 }
1178 }
1180 FieldInfo* field = FieldInfo::from_field_array(fa, n);
1181 field->initialize(access_flags.as_short(),
1182 name_index,
1183 signature_index,
1184 constantvalue_index,
1185 0);
1186 if (parsed_annotations.has_any_annotations())
1187 parsed_annotations.apply_to(field);
1189 BasicType type = cp->basic_type_for_signature_at(signature_index);
1191 // Remember how many oops we encountered and compute allocation type
1192 FieldAllocationType atype = fac->update(is_static, type);
1194 // The correct offset is computed later (all oop fields will be located together)
1195 // We temporarily store the allocation type in the offset field
1196 field->set_offset(atype);
1197 }
1199 int index = length;
1200 if (num_injected != 0) {
1201 for (int n = 0; n < num_injected; n++) {
1202 // Check for duplicates
1203 if (injected[n].may_be_java) {
1204 Symbol* name = injected[n].name();
1205 Symbol* signature = injected[n].signature();
1206 bool duplicate = false;
1207 for (int i = 0; i < length; i++) {
1208 FieldInfo* f = FieldInfo::from_field_array(fa, i);
1209 if (name == cp->symbol_at(f->name_index()) &&
1210 signature == cp->symbol_at(f->signature_index())) {
1211 // Symbol is desclared in Java so skip this one
1212 duplicate = true;
1213 break;
1214 }
1215 }
1216 if (duplicate) {
1217 // These will be removed from the field array at the end
1218 continue;
1219 }
1220 }
1222 // Injected field
1223 FieldInfo* field = FieldInfo::from_field_array(fa, index);
1224 field->initialize(JVM_ACC_FIELD_INTERNAL,
1225 injected[n].name_index,
1226 injected[n].signature_index,
1227 0,
1228 0);
1230 BasicType type = FieldType::basic_type(injected[n].signature());
1232 // Remember how many oops we encountered and compute allocation type
1233 FieldAllocationType atype = fac->update(false, type);
1235 // The correct offset is computed later (all oop fields will be located together)
1236 // We temporarily store the allocation type in the offset field
1237 field->set_offset(atype);
1238 index++;
1239 }
1240 }
1242 // Now copy the fields' data from the temporary resource array.
1243 // Sometimes injected fields already exist in the Java source so
1244 // the fields array could be too long. In that case the
1245 // fields array is trimed. Also unused slots that were reserved
1246 // for generic signature indexes are discarded.
1247 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(
1248 index * FieldInfo::field_slots + num_generic_signature,
1249 CHECK_(nullHandle));
1250 typeArrayHandle fields(THREAD, new_fields);
1251 {
1252 int i = 0;
1253 for (; i < index * FieldInfo::field_slots; i++) {
1254 new_fields->short_at_put(i, fa[i]);
1255 }
1256 for (int j = total_fields * FieldInfo::field_slots;
1257 j < generic_signature_slot; j++) {
1258 new_fields->short_at_put(i++, fa[j]);
1259 }
1260 assert(i == new_fields->length(), "");
1261 }
1263 if (_need_verify && length > 1) {
1264 // Check duplicated fields
1265 ResourceMark rm(THREAD);
1266 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1267 THREAD, NameSigHash*, HASH_ROW_SIZE);
1268 initialize_hashtable(names_and_sigs);
1269 bool dup = false;
1270 {
1271 debug_only(No_Safepoint_Verifier nsv;)
1272 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
1273 Symbol* name = fs.name();
1274 Symbol* sig = fs.signature();
1275 // If no duplicates, add name/signature in hashtable names_and_sigs.
1276 if (!put_after_lookup(name, sig, names_and_sigs)) {
1277 dup = true;
1278 break;
1279 }
1280 }
1281 }
1282 if (dup) {
1283 classfile_parse_error("Duplicate field name&signature in class file %s",
1284 CHECK_(nullHandle));
1285 }
1286 }
1288 return fields;
1289 }
1292 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1293 while (length-- > 0) {
1294 *dest++ = Bytes::get_Java_u2((u1*) (src++));
1295 }
1296 }
1299 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length,
1300 u4 exception_table_length,
1301 constantPoolHandle cp,
1302 TRAPS) {
1303 ClassFileStream* cfs = stream();
1304 typeArrayHandle nullHandle;
1306 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index]
1307 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle));
1308 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh);
1310 int index = 0;
1311 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index
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 // Will check legal target after parsing code array in verifier.
1318 if (_need_verify) {
1319 guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1320 "Illegal exception table range in class file %s", CHECK_(nullHandle));
1321 guarantee_property(handler_pc < code_length,
1322 "Illegal exception table handler in class file %s", CHECK_(nullHandle));
1323 if (catch_type_index != 0) {
1324 guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
1325 is_klass_reference(cp, catch_type_index),
1326 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle));
1327 }
1328 }
1329 exception_handlers->int_at_put(index++, start_pc);
1330 exception_handlers->int_at_put(index++, end_pc);
1331 exception_handlers->int_at_put(index++, handler_pc);
1332 exception_handlers->int_at_put(index++, catch_type_index);
1333 }
1334 return exception_handlers;
1335 }
1337 void ClassFileParser::parse_linenumber_table(
1338 u4 code_attribute_length, u4 code_length,
1339 CompressedLineNumberWriteStream** write_stream, TRAPS) {
1340 ClassFileStream* cfs = stream();
1341 unsigned int num_entries = cfs->get_u2(CHECK);
1343 // Each entry is a u2 start_pc, and a u2 line_number
1344 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1346 // Verify line number attribute and table length
1347 check_property(
1348 code_attribute_length == sizeof(u2) + length_in_bytes,
1349 "LineNumberTable attribute has wrong length in class file %s", CHECK);
1351 cfs->guarantee_more(length_in_bytes, CHECK);
1353 if ((*write_stream) == NULL) {
1354 if (length_in_bytes > fixed_buffer_size) {
1355 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1356 } else {
1357 (*write_stream) = new CompressedLineNumberWriteStream(
1358 linenumbertable_buffer, fixed_buffer_size);
1359 }
1360 }
1362 while (num_entries-- > 0) {
1363 u2 bci = cfs->get_u2_fast(); // start_pc
1364 u2 line = cfs->get_u2_fast(); // line_number
1365 guarantee_property(bci < code_length,
1366 "Invalid pc in LineNumberTable in class file %s", CHECK);
1367 (*write_stream)->write_pair(bci, line);
1368 }
1369 }
1372 // Class file LocalVariableTable elements.
1373 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1374 public:
1375 u2 start_bci;
1376 u2 length;
1377 u2 name_cp_index;
1378 u2 descriptor_cp_index;
1379 u2 slot;
1380 };
1383 class LVT_Hash: public CHeapObj<mtClass> {
1384 public:
1385 LocalVariableTableElement *_elem; // element
1386 LVT_Hash* _next; // Next entry in hash table
1387 };
1389 unsigned int hash(LocalVariableTableElement *elem) {
1390 unsigned int raw_hash = elem->start_bci;
1392 raw_hash = elem->length + raw_hash * 37;
1393 raw_hash = elem->name_cp_index + raw_hash * 37;
1394 raw_hash = elem->slot + raw_hash * 37;
1396 return raw_hash % HASH_ROW_SIZE;
1397 }
1399 void initialize_hashtable(LVT_Hash** table) {
1400 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1401 table[i] = NULL;
1402 }
1403 }
1405 void clear_hashtable(LVT_Hash** table) {
1406 for (int i = 0; i < HASH_ROW_SIZE; i++) {
1407 LVT_Hash* current = table[i];
1408 LVT_Hash* next;
1409 while (current != NULL) {
1410 next = current->_next;
1411 current->_next = NULL;
1412 delete(current);
1413 current = next;
1414 }
1415 table[i] = NULL;
1416 }
1417 }
1419 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
1420 LVT_Hash* entry = table[index];
1422 /*
1423 * 3-tuple start_bci/length/slot has to be unique key,
1424 * so the following comparison seems to be redundant:
1425 * && elem->name_cp_index == entry->_elem->name_cp_index
1426 */
1427 while (entry != NULL) {
1428 if (elem->start_bci == entry->_elem->start_bci
1429 && elem->length == entry->_elem->length
1430 && elem->name_cp_index == entry->_elem->name_cp_index
1431 && elem->slot == entry->_elem->slot
1432 ) {
1433 return entry;
1434 }
1435 entry = entry->_next;
1436 }
1437 return NULL;
1438 }
1440 // Return false if the local variable is found in table.
1441 // Return true if no duplicate is found.
1442 // And local variable is added as a new entry in table.
1443 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
1444 // First lookup for duplicates
1445 int index = hash(elem);
1446 LVT_Hash* entry = LVT_lookup(elem, index, table);
1448 if (entry != NULL) {
1449 return false;
1450 }
1451 // No duplicate is found, allocate a new entry and fill it.
1452 if ((entry = new LVT_Hash()) == NULL) {
1453 return false;
1454 }
1455 entry->_elem = elem;
1457 // Insert into hash table
1458 entry->_next = table[index];
1459 table[index] = entry;
1461 return true;
1462 }
1464 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1465 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1466 lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1467 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1468 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1469 lvt->signature_cp_index = 0;
1470 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1471 }
1473 // Function is used to parse both attributes:
1474 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1475 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1476 u2 max_locals,
1477 u4 code_attribute_length,
1478 constantPoolHandle cp,
1479 u2* localvariable_table_length,
1480 bool isLVTT,
1481 TRAPS) {
1482 ClassFileStream* cfs = stream();
1483 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1484 *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1485 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1486 // Verify local variable table attribute has right length
1487 if (_need_verify) {
1488 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1489 "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1490 }
1491 u2* localvariable_table_start = cfs->get_u2_buffer();
1492 assert(localvariable_table_start != NULL, "null local variable table");
1493 if (!_need_verify) {
1494 cfs->skip_u2_fast(size);
1495 } else {
1496 cfs->guarantee_more(size * 2, CHECK_NULL);
1497 for(int i = 0; i < (*localvariable_table_length); i++) {
1498 u2 start_pc = cfs->get_u2_fast();
1499 u2 length = cfs->get_u2_fast();
1500 u2 name_index = cfs->get_u2_fast();
1501 u2 descriptor_index = cfs->get_u2_fast();
1502 u2 index = cfs->get_u2_fast();
1503 // Assign to a u4 to avoid overflow
1504 u4 end_pc = (u4)start_pc + (u4)length;
1506 if (start_pc >= code_length) {
1507 classfile_parse_error(
1508 "Invalid start_pc %u in %s in class file %s",
1509 start_pc, tbl_name, CHECK_NULL);
1510 }
1511 if (end_pc > code_length) {
1512 classfile_parse_error(
1513 "Invalid length %u in %s in class file %s",
1514 length, tbl_name, CHECK_NULL);
1515 }
1516 int cp_size = cp->length();
1517 guarantee_property(
1518 valid_cp_range(name_index, cp_size) &&
1519 cp->tag_at(name_index).is_utf8(),
1520 "Name index %u in %s has bad constant type in class file %s",
1521 name_index, tbl_name, CHECK_NULL);
1522 guarantee_property(
1523 valid_cp_range(descriptor_index, cp_size) &&
1524 cp->tag_at(descriptor_index).is_utf8(),
1525 "Signature index %u in %s has bad constant type in class file %s",
1526 descriptor_index, tbl_name, CHECK_NULL);
1528 Symbol* name = cp->symbol_at(name_index);
1529 Symbol* sig = cp->symbol_at(descriptor_index);
1530 verify_legal_field_name(name, CHECK_NULL);
1531 u2 extra_slot = 0;
1532 if (!isLVTT) {
1533 verify_legal_field_signature(name, sig, CHECK_NULL);
1535 // 4894874: check special cases for double and long local variables
1536 if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1537 sig == vmSymbols::type_signature(T_LONG)) {
1538 extra_slot = 1;
1539 }
1540 }
1541 guarantee_property((index + extra_slot) < max_locals,
1542 "Invalid index %u in %s in class file %s",
1543 index, tbl_name, CHECK_NULL);
1544 }
1545 }
1546 return localvariable_table_start;
1547 }
1550 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1551 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) {
1552 ClassFileStream* cfs = stream();
1553 u2 index = 0; // index in the array with long/double occupying two slots
1554 u4 i1 = *u1_index;
1555 u4 i2 = *u2_index + 1;
1556 for(int i = 0; i < array_length; i++) {
1557 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1558 index++;
1559 if (tag == ITEM_Long || tag == ITEM_Double) {
1560 index++;
1561 } else if (tag == ITEM_Object) {
1562 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1563 guarantee_property(valid_cp_range(class_index, cp->length()) &&
1564 is_klass_reference(cp, class_index),
1565 "Bad class index %u in StackMap in class file %s",
1566 class_index, CHECK);
1567 } else if (tag == ITEM_Uninitialized) {
1568 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1569 guarantee_property(
1570 offset < code_length,
1571 "Bad uninitialized type offset %u in StackMap in class file %s",
1572 offset, CHECK);
1573 } else {
1574 guarantee_property(
1575 tag <= (u1)ITEM_Uninitialized,
1576 "Unknown variable type %u in StackMap in class file %s",
1577 tag, CHECK);
1578 }
1579 }
1580 u2_array[*u2_index] = index;
1581 *u1_index = i1;
1582 *u2_index = i2;
1583 }
1585 typeArrayOop ClassFileParser::parse_stackmap_table(
1586 u4 code_attribute_length, TRAPS) {
1587 if (code_attribute_length == 0)
1588 return NULL;
1590 ClassFileStream* cfs = stream();
1591 u1* stackmap_table_start = cfs->get_u1_buffer();
1592 assert(stackmap_table_start != NULL, "null stackmap table");
1594 // check code_attribute_length first
1595 stream()->skip_u1(code_attribute_length, CHECK_NULL);
1597 if (!_need_verify && !DumpSharedSpaces) {
1598 return NULL;
1599 }
1601 typeArrayOop stackmap_data =
1602 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL);
1604 stackmap_data->set_length(code_attribute_length);
1605 memcpy((void*)stackmap_data->byte_at_addr(0),
1606 (void*)stackmap_table_start, code_attribute_length);
1607 return stackmap_data;
1608 }
1610 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1611 u4 method_attribute_length,
1612 constantPoolHandle cp, TRAPS) {
1613 ClassFileStream* cfs = stream();
1614 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1615 *checked_exceptions_length = cfs->get_u2_fast();
1616 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1617 u2* checked_exceptions_start = cfs->get_u2_buffer();
1618 assert(checked_exceptions_start != NULL, "null checked exceptions");
1619 if (!_need_verify) {
1620 cfs->skip_u2_fast(size);
1621 } else {
1622 // Verify each value in the checked exception table
1623 u2 checked_exception;
1624 u2 len = *checked_exceptions_length;
1625 cfs->guarantee_more(2 * len, CHECK_NULL);
1626 for (int i = 0; i < len; i++) {
1627 checked_exception = cfs->get_u2_fast();
1628 check_property(
1629 valid_cp_range(checked_exception, cp->length()) &&
1630 is_klass_reference(cp, checked_exception),
1631 "Exception name has bad type at constant pool %u in class file %s",
1632 checked_exception, CHECK_NULL);
1633 }
1634 }
1635 // check exceptions attribute length
1636 if (_need_verify) {
1637 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1638 sizeof(u2) * size),
1639 "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1640 }
1641 return checked_exceptions_start;
1642 }
1644 void ClassFileParser::throwIllegalSignature(
1645 const char* type, Symbol* name, Symbol* sig, TRAPS) {
1646 ResourceMark rm(THREAD);
1647 Exceptions::fthrow(THREAD_AND_LOCATION,
1648 vmSymbols::java_lang_ClassFormatError(),
1649 "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1650 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1651 }
1653 // Skip an annotation. Return >=limit if there is any problem.
1654 int ClassFileParser::skip_annotation(u1* buffer, int limit, int index) {
1655 // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1656 // value := switch (tag:u1) { ... }
1657 index += 2; // skip atype
1658 if ((index += 2) >= limit) return limit; // read nmem
1659 int nmem = Bytes::get_Java_u2(buffer+index-2);
1660 while (--nmem >= 0 && index < limit) {
1661 index += 2; // skip member
1662 index = skip_annotation_value(buffer, limit, index);
1663 }
1664 return index;
1665 }
1667 // Skip an annotation value. Return >=limit if there is any problem.
1668 int ClassFileParser::skip_annotation_value(u1* buffer, int limit, int index) {
1669 // value := switch (tag:u1) {
1670 // case B, C, I, S, Z, D, F, J, c: con:u2;
1671 // case e: e_class:u2 e_name:u2;
1672 // case s: s_con:u2;
1673 // case [: do(nval:u2) {value};
1674 // case @: annotation;
1675 // case s: s_con:u2;
1676 // }
1677 if ((index += 1) >= limit) return limit; // read tag
1678 u1 tag = buffer[index-1];
1679 switch (tag) {
1680 case 'B': case 'C': case 'I': case 'S': case 'Z':
1681 case 'D': case 'F': case 'J': case 'c': case 's':
1682 index += 2; // skip con or s_con
1683 break;
1684 case 'e':
1685 index += 4; // skip e_class, e_name
1686 break;
1687 case '[':
1688 {
1689 if ((index += 2) >= limit) return limit; // read nval
1690 int nval = Bytes::get_Java_u2(buffer+index-2);
1691 while (--nval >= 0 && index < limit) {
1692 index = skip_annotation_value(buffer, limit, index);
1693 }
1694 }
1695 break;
1696 case '@':
1697 index = skip_annotation(buffer, limit, index);
1698 break;
1699 default:
1700 assert(false, "annotation tag");
1701 return limit; // bad tag byte
1702 }
1703 return index;
1704 }
1706 // Sift through annotations, looking for those significant to the VM:
1707 void ClassFileParser::parse_annotations(u1* buffer, int limit,
1708 constantPoolHandle cp,
1709 ClassFileParser::AnnotationCollector* coll,
1710 TRAPS) {
1711 // annotations := do(nann:u2) {annotation}
1712 int index = 0;
1713 if ((index += 2) >= limit) return; // read nann
1714 int nann = Bytes::get_Java_u2(buffer+index-2);
1715 enum { // initial annotation layout
1716 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
1717 count_off = 2, // u2 such as 1 (one value)
1718 member_off = 4, // utf8 such as 'value'
1719 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
1720 e_tag_val = 'e',
1721 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1722 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1723 e_size = 11, // end of 'e' annotation
1724 c_tag_val = 'c',
1725 c_con_off = 7, // utf8 payload, such as 'I' or 'Ljava/lang/String;'
1726 c_size = 9, // end of 'c' annotation
1727 min_size = 6 // smallest possible size (zero members)
1728 };
1729 while ((--nann) >= 0 && (index-2 + min_size <= limit)) {
1730 int index0 = index;
1731 index = skip_annotation(buffer, limit, index);
1732 u1* abase = buffer + index0;
1733 int atype = Bytes::get_Java_u2(abase + atype_off);
1734 int count = Bytes::get_Java_u2(abase + count_off);
1735 Symbol* aname = check_symbol_at(cp, atype);
1736 if (aname == NULL) break; // invalid annotation name
1737 Symbol* member = NULL;
1738 if (count >= 1) {
1739 int member_index = Bytes::get_Java_u2(abase + member_off);
1740 member = check_symbol_at(cp, member_index);
1741 if (member == NULL) break; // invalid member name
1742 }
1744 // Here is where parsing particular annotations will take place.
1745 AnnotationCollector::ID id = coll->annotation_index(aname);
1746 if (id == AnnotationCollector::_unknown) continue;
1747 coll->set_annotation(id);
1748 // If there are no values, just set the bit and move on:
1749 if (count == 0) continue;
1751 // For the record, here is how annotation payloads can be collected.
1752 // Suppose we want to capture @Retention.value. Here is how:
1753 //if (id == AnnotationCollector::_class_Retention) {
1754 // Symbol* payload = NULL;
1755 // if (count == 1
1756 // && e_size == (index0 - index) // match size
1757 // && e_tag_val == *(abase + tag_off)
1758 // && (check_symbol_at(cp, Bytes::get_Java_u2(abase + e_type_off))
1759 // == vmSymbols::RetentionPolicy_signature())
1760 // && member == vmSymbols::value_name()) {
1761 // payload = check_symbol_at(cp, Bytes::get_Java_u2(abase + e_con_off));
1762 // }
1763 // check_property(payload != NULL,
1764 // "Invalid @Retention annotation at offset %u in class file %s",
1765 // index0, CHECK);
1766 // if (payload != NULL) {
1767 // payload->increment_refcount();
1768 // coll->_class_RetentionPolicy = payload;
1769 // }
1770 //}
1771 }
1772 }
1774 ClassFileParser::AnnotationCollector::ID ClassFileParser::AnnotationCollector::annotation_index(Symbol* name) {
1775 vmSymbols::SID sid = vmSymbols::find_sid(name);
1776 switch (sid) {
1777 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_ForceInline_signature):
1778 if (_location != _in_method) break; // only allow for methods
1779 return _method_ForceInline;
1780 default: break;
1781 }
1782 return AnnotationCollector::_unknown;
1783 }
1785 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1786 fatal("no field annotations yet");
1787 }
1789 void ClassFileParser::MethodAnnotationCollector::apply_to(methodHandle m) {
1790 if (has_annotation(_method_ForceInline))
1791 m->set_force_inline(true);
1792 }
1794 void ClassFileParser::ClassAnnotationCollector::apply_to(instanceKlassHandle k) {
1795 fatal("no class annotations yet");
1796 }
1799 #define MAX_ARGS_SIZE 255
1800 #define MAX_CODE_SIZE 65535
1801 #define INITIAL_MAX_LVT_NUMBER 256
1803 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1804 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
1805 // methodOop to save footprint, so we only know the size of the resulting methodOop when the
1806 // entire method attribute is parsed.
1807 //
1808 // The promoted_flags parameter is used to pass relevant access_flags
1809 // from the method back up to the containing klass. These flag values
1810 // are added to klass's access_flags.
1812 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface,
1813 AccessFlags *promoted_flags,
1814 typeArrayHandle* method_annotations,
1815 typeArrayHandle* method_parameter_annotations,
1816 typeArrayHandle* method_default_annotations,
1817 TRAPS) {
1818 ClassFileStream* cfs = stream();
1819 methodHandle nullHandle;
1820 ResourceMark rm(THREAD);
1821 // Parse fixed parts
1822 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1824 int flags = cfs->get_u2_fast();
1825 u2 name_index = cfs->get_u2_fast();
1826 int cp_size = cp->length();
1827 check_property(
1828 valid_cp_range(name_index, cp_size) &&
1829 cp->tag_at(name_index).is_utf8(),
1830 "Illegal constant pool index %u for method name in class file %s",
1831 name_index, CHECK_(nullHandle));
1832 Symbol* name = cp->symbol_at(name_index);
1833 verify_legal_method_name(name, CHECK_(nullHandle));
1835 u2 signature_index = cfs->get_u2_fast();
1836 guarantee_property(
1837 valid_cp_range(signature_index, cp_size) &&
1838 cp->tag_at(signature_index).is_utf8(),
1839 "Illegal constant pool index %u for method signature in class file %s",
1840 signature_index, CHECK_(nullHandle));
1841 Symbol* signature = cp->symbol_at(signature_index);
1843 AccessFlags access_flags;
1844 if (name == vmSymbols::class_initializer_name()) {
1845 // We ignore the other access flags for a valid class initializer.
1846 // (JVM Spec 2nd ed., chapter 4.6)
1847 if (_major_version < 51) { // backward compatibility
1848 flags = JVM_ACC_STATIC;
1849 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
1850 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
1851 }
1852 } else {
1853 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
1854 }
1856 int args_size = -1; // only used when _need_verify is true
1857 if (_need_verify) {
1858 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
1859 verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1860 if (args_size > MAX_ARGS_SIZE) {
1861 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
1862 }
1863 }
1865 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
1867 // Default values for code and exceptions attribute elements
1868 u2 max_stack = 0;
1869 u2 max_locals = 0;
1870 u4 code_length = 0;
1871 u1* code_start = 0;
1872 u2 exception_table_length = 0;
1873 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array());
1874 u2 checked_exceptions_length = 0;
1875 u2* checked_exceptions_start = NULL;
1876 CompressedLineNumberWriteStream* linenumber_table = NULL;
1877 int linenumber_table_length = 0;
1878 int total_lvt_length = 0;
1879 u2 lvt_cnt = 0;
1880 u2 lvtt_cnt = 0;
1881 bool lvt_allocated = false;
1882 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
1883 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
1884 u2* localvariable_table_length;
1885 u2** localvariable_table_start;
1886 u2* localvariable_type_table_length;
1887 u2** localvariable_type_table_start;
1888 bool parsed_code_attribute = false;
1889 bool parsed_checked_exceptions_attribute = false;
1890 bool parsed_stackmap_attribute = false;
1891 // stackmap attribute - JDK1.5
1892 typeArrayHandle stackmap_data;
1893 u2 generic_signature_index = 0;
1894 MethodAnnotationCollector parsed_annotations;
1895 u1* runtime_visible_annotations = NULL;
1896 int runtime_visible_annotations_length = 0;
1897 u1* runtime_invisible_annotations = NULL;
1898 int runtime_invisible_annotations_length = 0;
1899 u1* runtime_visible_parameter_annotations = NULL;
1900 int runtime_visible_parameter_annotations_length = 0;
1901 u1* runtime_invisible_parameter_annotations = NULL;
1902 int runtime_invisible_parameter_annotations_length = 0;
1903 u1* annotation_default = NULL;
1904 int annotation_default_length = 0;
1906 // Parse code and exceptions attribute
1907 u2 method_attributes_count = cfs->get_u2_fast();
1908 while (method_attributes_count--) {
1909 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
1910 u2 method_attribute_name_index = cfs->get_u2_fast();
1911 u4 method_attribute_length = cfs->get_u4_fast();
1912 check_property(
1913 valid_cp_range(method_attribute_name_index, cp_size) &&
1914 cp->tag_at(method_attribute_name_index).is_utf8(),
1915 "Invalid method attribute name index %u in class file %s",
1916 method_attribute_name_index, CHECK_(nullHandle));
1918 Symbol* method_attribute_name = cp->symbol_at(method_attribute_name_index);
1919 if (method_attribute_name == vmSymbols::tag_code()) {
1920 // Parse Code attribute
1921 if (_need_verify) {
1922 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(),
1923 "Code attribute in native or abstract methods in class file %s",
1924 CHECK_(nullHandle));
1925 }
1926 if (parsed_code_attribute) {
1927 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
1928 }
1929 parsed_code_attribute = true;
1931 // Stack size, locals size, and code size
1932 if (_major_version == 45 && _minor_version <= 2) {
1933 cfs->guarantee_more(4, CHECK_(nullHandle));
1934 max_stack = cfs->get_u1_fast();
1935 max_locals = cfs->get_u1_fast();
1936 code_length = cfs->get_u2_fast();
1937 } else {
1938 cfs->guarantee_more(8, CHECK_(nullHandle));
1939 max_stack = cfs->get_u2_fast();
1940 max_locals = cfs->get_u2_fast();
1941 code_length = cfs->get_u4_fast();
1942 }
1943 if (_need_verify) {
1944 guarantee_property(args_size <= max_locals,
1945 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
1946 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
1947 "Invalid method Code length %u in class file %s",
1948 code_length, CHECK_(nullHandle));
1949 }
1950 // Code pointer
1951 code_start = cfs->get_u1_buffer();
1952 assert(code_start != NULL, "null code start");
1953 cfs->guarantee_more(code_length, CHECK_(nullHandle));
1954 cfs->skip_u1_fast(code_length);
1956 // Exception handler table
1957 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
1958 exception_table_length = cfs->get_u2_fast();
1959 if (exception_table_length > 0) {
1960 exception_handlers =
1961 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle));
1962 }
1964 // Parse additional attributes in code attribute
1965 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
1966 u2 code_attributes_count = cfs->get_u2_fast();
1968 unsigned int calculated_attribute_length = 0;
1970 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
1971 calculated_attribute_length =
1972 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
1973 } else {
1974 // max_stack, locals and length are smaller in pre-version 45.2 classes
1975 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
1976 }
1977 calculated_attribute_length +=
1978 code_length +
1979 sizeof(exception_table_length) +
1980 sizeof(code_attributes_count) +
1981 exception_table_length *
1982 ( sizeof(u2) + // start_pc
1983 sizeof(u2) + // end_pc
1984 sizeof(u2) + // handler_pc
1985 sizeof(u2) ); // catch_type_index
1987 while (code_attributes_count--) {
1988 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
1989 u2 code_attribute_name_index = cfs->get_u2_fast();
1990 u4 code_attribute_length = cfs->get_u4_fast();
1991 calculated_attribute_length += code_attribute_length +
1992 sizeof(code_attribute_name_index) +
1993 sizeof(code_attribute_length);
1994 check_property(valid_cp_range(code_attribute_name_index, cp_size) &&
1995 cp->tag_at(code_attribute_name_index).is_utf8(),
1996 "Invalid code attribute name index %u in class file %s",
1997 code_attribute_name_index,
1998 CHECK_(nullHandle));
1999 if (LoadLineNumberTables &&
2000 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2001 // Parse and compress line number table
2002 parse_linenumber_table(code_attribute_length, code_length,
2003 &linenumber_table, CHECK_(nullHandle));
2005 } else if (LoadLocalVariableTables &&
2006 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2007 // Parse local variable table
2008 if (!lvt_allocated) {
2009 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2010 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2011 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2012 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2013 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2014 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2015 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2016 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2017 lvt_allocated = true;
2018 }
2019 if (lvt_cnt == max_lvt_cnt) {
2020 max_lvt_cnt <<= 1;
2021 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2022 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2023 }
2024 localvariable_table_start[lvt_cnt] =
2025 parse_localvariable_table(code_length,
2026 max_locals,
2027 code_attribute_length,
2028 cp,
2029 &localvariable_table_length[lvt_cnt],
2030 false, // is not LVTT
2031 CHECK_(nullHandle));
2032 total_lvt_length += localvariable_table_length[lvt_cnt];
2033 lvt_cnt++;
2034 } else if (LoadLocalVariableTypeTables &&
2035 _major_version >= JAVA_1_5_VERSION &&
2036 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2037 if (!lvt_allocated) {
2038 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2039 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2040 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2041 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2042 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2043 THREAD, u2, INITIAL_MAX_LVT_NUMBER);
2044 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2045 THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2046 lvt_allocated = true;
2047 }
2048 // Parse local variable type table
2049 if (lvtt_cnt == max_lvtt_cnt) {
2050 max_lvtt_cnt <<= 1;
2051 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2052 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2053 }
2054 localvariable_type_table_start[lvtt_cnt] =
2055 parse_localvariable_table(code_length,
2056 max_locals,
2057 code_attribute_length,
2058 cp,
2059 &localvariable_type_table_length[lvtt_cnt],
2060 true, // is LVTT
2061 CHECK_(nullHandle));
2062 lvtt_cnt++;
2063 } else if (UseSplitVerifier &&
2064 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2065 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2066 // Stack map is only needed by the new verifier in JDK1.5.
2067 if (parsed_stackmap_attribute) {
2068 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
2069 }
2070 typeArrayOop sm =
2071 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
2072 stackmap_data = typeArrayHandle(THREAD, sm);
2073 parsed_stackmap_attribute = true;
2074 } else {
2075 // Skip unknown attributes
2076 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
2077 }
2078 }
2079 // check method attribute length
2080 if (_need_verify) {
2081 guarantee_property(method_attribute_length == calculated_attribute_length,
2082 "Code segment has wrong length in class file %s", CHECK_(nullHandle));
2083 }
2084 } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2085 // Parse Exceptions attribute
2086 if (parsed_checked_exceptions_attribute) {
2087 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
2088 }
2089 parsed_checked_exceptions_attribute = true;
2090 checked_exceptions_start =
2091 parse_checked_exceptions(&checked_exceptions_length,
2092 method_attribute_length,
2093 cp, CHECK_(nullHandle));
2094 } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2095 if (method_attribute_length != 0) {
2096 classfile_parse_error(
2097 "Invalid Synthetic method attribute length %u in class file %s",
2098 method_attribute_length, CHECK_(nullHandle));
2099 }
2100 // Should we check that there hasn't already been a synthetic attribute?
2101 access_flags.set_is_synthetic();
2102 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2103 if (method_attribute_length != 0) {
2104 classfile_parse_error(
2105 "Invalid Deprecated method attribute length %u in class file %s",
2106 method_attribute_length, CHECK_(nullHandle));
2107 }
2108 } else if (_major_version >= JAVA_1_5_VERSION) {
2109 if (method_attribute_name == vmSymbols::tag_signature()) {
2110 if (method_attribute_length != 2) {
2111 classfile_parse_error(
2112 "Invalid Signature attribute length %u in class file %s",
2113 method_attribute_length, CHECK_(nullHandle));
2114 }
2115 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index
2116 generic_signature_index = cfs->get_u2_fast();
2117 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2118 runtime_visible_annotations_length = method_attribute_length;
2119 runtime_visible_annotations = cfs->get_u1_buffer();
2120 assert(runtime_visible_annotations != NULL, "null visible annotations");
2121 parse_annotations(runtime_visible_annotations, runtime_visible_annotations_length, cp, &parsed_annotations, CHECK_(nullHandle));
2122 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
2123 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2124 runtime_invisible_annotations_length = method_attribute_length;
2125 runtime_invisible_annotations = cfs->get_u1_buffer();
2126 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2127 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
2128 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2129 runtime_visible_parameter_annotations_length = method_attribute_length;
2130 runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2131 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2132 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
2133 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2134 runtime_invisible_parameter_annotations_length = method_attribute_length;
2135 runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2136 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
2137 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
2138 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2139 annotation_default_length = method_attribute_length;
2140 annotation_default = cfs->get_u1_buffer();
2141 assert(annotation_default != NULL, "null annotation default");
2142 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
2143 } else {
2144 // Skip unknown attributes
2145 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2146 }
2147 } else {
2148 // Skip unknown attributes
2149 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2150 }
2151 }
2153 if (linenumber_table != NULL) {
2154 linenumber_table->write_terminator();
2155 linenumber_table_length = linenumber_table->position();
2156 }
2158 // Make sure there's at least one Code attribute in non-native/non-abstract method
2159 if (_need_verify) {
2160 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
2161 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
2162 }
2164 // All sizing information for a methodOop is finally available, now create it
2165 methodOop m_oop = oopFactory::new_method(code_length, access_flags, linenumber_table_length,
2166 total_lvt_length, checked_exceptions_length,
2167 oopDesc::IsSafeConc, CHECK_(nullHandle));
2168 methodHandle m (THREAD, m_oop);
2170 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize);
2172 // Fill in information from fixed part (access_flags already set)
2173 m->set_constants(cp());
2174 m->set_name_index(name_index);
2175 m->set_signature_index(signature_index);
2176 m->set_generic_signature_index(generic_signature_index);
2177 #ifdef CC_INTERP
2178 // hmm is there a gc issue here??
2179 ResultTypeFinder rtf(cp->symbol_at(signature_index));
2180 m->set_result_index(rtf.type());
2181 #endif
2183 if (args_size >= 0) {
2184 m->set_size_of_parameters(args_size);
2185 } else {
2186 m->compute_size_of_parameters(THREAD);
2187 }
2188 #ifdef ASSERT
2189 if (args_size >= 0) {
2190 m->compute_size_of_parameters(THREAD);
2191 assert(args_size == m->size_of_parameters(), "");
2192 }
2193 #endif
2195 // Fill in code attribute information
2196 m->set_max_stack(max_stack);
2197 m->set_max_locals(max_locals);
2198 m->constMethod()->set_stackmap_data(stackmap_data());
2200 /**
2201 * The exception_table field is the flag used to indicate
2202 * that the methodOop and it's associated constMethodOop are partially
2203 * initialized and thus are exempt from pre/post GC verification. Once
2204 * the field is set, the oops are considered fully initialized so make
2205 * sure that the oops can pass verification when this field is set.
2206 */
2207 m->set_exception_table(exception_handlers());
2209 // Copy byte codes
2210 m->set_code(code_start);
2212 // Copy line number table
2213 if (linenumber_table != NULL) {
2214 memcpy(m->compressed_linenumber_table(),
2215 linenumber_table->buffer(), linenumber_table_length);
2216 }
2218 // Copy checked exceptions
2219 if (checked_exceptions_length > 0) {
2220 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2221 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
2222 }
2224 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2225 *
2226 * Rules for LVT's and LVTT's are:
2227 * - There can be any number of LVT's and LVTT's.
2228 * - If there are n LVT's, it is the same as if there was just
2229 * one LVT containing all the entries from the n LVT's.
2230 * - There may be no more than one LVT entry per local variable.
2231 * Two LVT entries are 'equal' if these fields are the same:
2232 * start_pc, length, name, slot
2233 * - There may be no more than one LVTT entry per each LVT entry.
2234 * Each LVTT entry has to match some LVT entry.
2235 * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2236 */
2237 if (total_lvt_length > 0) {
2238 int tbl_no, idx;
2240 promoted_flags->set_has_localvariable_table();
2242 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
2243 initialize_hashtable(lvt_Hash);
2245 // To fill LocalVariableTable in
2246 Classfile_LVT_Element* cf_lvt;
2247 LocalVariableTableElement* lvt = m->localvariable_table_start();
2249 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2250 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2251 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2252 copy_lvt_element(&cf_lvt[idx], lvt);
2253 // If no duplicates, add LVT elem in hashtable lvt_Hash.
2254 if (LVT_put_after_lookup(lvt, lvt_Hash) == false
2255 && _need_verify
2256 && _major_version >= JAVA_1_5_VERSION ) {
2257 clear_hashtable(lvt_Hash);
2258 classfile_parse_error("Duplicated LocalVariableTable attribute "
2259 "entry for '%s' in class file %s",
2260 cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2261 CHECK_(nullHandle));
2262 }
2263 }
2264 }
2266 // To merge LocalVariableTable and LocalVariableTypeTable
2267 Classfile_LVT_Element* cf_lvtt;
2268 LocalVariableTableElement lvtt_elem;
2270 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2271 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2272 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2273 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2274 int index = hash(&lvtt_elem);
2275 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
2276 if (entry == NULL) {
2277 if (_need_verify) {
2278 clear_hashtable(lvt_Hash);
2279 classfile_parse_error("LVTT entry for '%s' in class file %s "
2280 "does not match any LVT entry",
2281 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2282 CHECK_(nullHandle));
2283 }
2284 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
2285 clear_hashtable(lvt_Hash);
2286 classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2287 "entry for '%s' in class file %s",
2288 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2289 CHECK_(nullHandle));
2290 } else {
2291 // to add generic signatures into LocalVariableTable
2292 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
2293 }
2294 }
2295 }
2296 clear_hashtable(lvt_Hash);
2297 }
2299 if (parsed_annotations.has_any_annotations())
2300 parsed_annotations.apply_to(m);
2301 *method_annotations = assemble_annotations(runtime_visible_annotations,
2302 runtime_visible_annotations_length,
2303 runtime_invisible_annotations,
2304 runtime_invisible_annotations_length,
2305 CHECK_(nullHandle));
2306 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations,
2307 runtime_visible_parameter_annotations_length,
2308 runtime_invisible_parameter_annotations,
2309 runtime_invisible_parameter_annotations_length,
2310 CHECK_(nullHandle));
2311 *method_default_annotations = assemble_annotations(annotation_default,
2312 annotation_default_length,
2313 NULL,
2314 0,
2315 CHECK_(nullHandle));
2317 if (name == vmSymbols::finalize_method_name() &&
2318 signature == vmSymbols::void_method_signature()) {
2319 if (m->is_empty_method()) {
2320 _has_empty_finalizer = true;
2321 } else {
2322 _has_finalizer = true;
2323 }
2324 }
2325 if (name == vmSymbols::object_initializer_name() &&
2326 signature == vmSymbols::void_method_signature() &&
2327 m->is_vanilla_constructor()) {
2328 _has_vanilla_constructor = true;
2329 }
2331 if (EnableInvokeDynamic && (m->is_method_handle_invoke() ||
2332 m->is_method_handle_adapter())) {
2333 THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(),
2334 "Method handle invokers must be defined internally to the VM", nullHandle);
2335 }
2337 return m;
2338 }
2341 // The promoted_flags parameter is used to pass relevant access_flags
2342 // from the methods back up to the containing klass. These flag values
2343 // are added to klass's access_flags.
2345 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface,
2346 AccessFlags* promoted_flags,
2347 bool* has_final_method,
2348 objArrayOop* methods_annotations_oop,
2349 objArrayOop* methods_parameter_annotations_oop,
2350 objArrayOop* methods_default_annotations_oop,
2351 TRAPS) {
2352 ClassFileStream* cfs = stream();
2353 objArrayHandle nullHandle;
2354 typeArrayHandle method_annotations;
2355 typeArrayHandle method_parameter_annotations;
2356 typeArrayHandle method_default_annotations;
2357 cfs->guarantee_more(2, CHECK_(nullHandle)); // length
2358 u2 length = cfs->get_u2_fast();
2359 if (length == 0) {
2360 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
2361 } else {
2362 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2363 objArrayHandle methods(THREAD, m);
2364 HandleMark hm(THREAD);
2365 objArrayHandle methods_annotations;
2366 objArrayHandle methods_parameter_annotations;
2367 objArrayHandle methods_default_annotations;
2368 for (int index = 0; index < length; index++) {
2369 methodHandle method = parse_method(cp, is_interface,
2370 promoted_flags,
2371 &method_annotations,
2372 &method_parameter_annotations,
2373 &method_default_annotations,
2374 CHECK_(nullHandle));
2375 if (method->is_final()) {
2376 *has_final_method = true;
2377 }
2378 methods->obj_at_put(index, method());
2379 if (method_annotations.not_null()) {
2380 if (methods_annotations.is_null()) {
2381 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2382 methods_annotations = objArrayHandle(THREAD, md);
2383 }
2384 methods_annotations->obj_at_put(index, method_annotations());
2385 }
2386 if (method_parameter_annotations.not_null()) {
2387 if (methods_parameter_annotations.is_null()) {
2388 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2389 methods_parameter_annotations = objArrayHandle(THREAD, md);
2390 }
2391 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations());
2392 }
2393 if (method_default_annotations.not_null()) {
2394 if (methods_default_annotations.is_null()) {
2395 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2396 methods_default_annotations = objArrayHandle(THREAD, md);
2397 }
2398 methods_default_annotations->obj_at_put(index, method_default_annotations());
2399 }
2400 }
2401 if (_need_verify && length > 1) {
2402 // Check duplicated methods
2403 ResourceMark rm(THREAD);
2404 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2405 THREAD, NameSigHash*, HASH_ROW_SIZE);
2406 initialize_hashtable(names_and_sigs);
2407 bool dup = false;
2408 {
2409 debug_only(No_Safepoint_Verifier nsv;)
2410 for (int i = 0; i < length; i++) {
2411 methodOop m = (methodOop)methods->obj_at(i);
2412 // If no duplicates, add name/signature in hashtable names_and_sigs.
2413 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2414 dup = true;
2415 break;
2416 }
2417 }
2418 }
2419 if (dup) {
2420 classfile_parse_error("Duplicate method name&signature in class file %s",
2421 CHECK_(nullHandle));
2422 }
2423 }
2425 *methods_annotations_oop = methods_annotations();
2426 *methods_parameter_annotations_oop = methods_parameter_annotations();
2427 *methods_default_annotations_oop = methods_default_annotations();
2429 return methods;
2430 }
2431 }
2434 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods,
2435 objArrayHandle methods_annotations,
2436 objArrayHandle methods_parameter_annotations,
2437 objArrayHandle methods_default_annotations,
2438 TRAPS) {
2439 typeArrayHandle nullHandle;
2440 int length = methods()->length();
2441 // If JVMTI original method ordering or sharing is enabled we have to
2442 // remember the original class file ordering.
2443 // We temporarily use the vtable_index field in the methodOop to store the
2444 // class file index, so we can read in after calling qsort.
2445 // Put the method ordering in the shared archive.
2446 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2447 for (int index = 0; index < length; index++) {
2448 methodOop m = methodOop(methods->obj_at(index));
2449 assert(!m->valid_vtable_index(), "vtable index should not be set");
2450 m->set_vtable_index(index);
2451 }
2452 }
2453 // Sort method array by ascending method name (for faster lookups & vtable construction)
2454 // Note that the ordering is not alphabetical, see Symbol::fast_compare
2455 methodOopDesc::sort_methods(methods(),
2456 methods_annotations(),
2457 methods_parameter_annotations(),
2458 methods_default_annotations());
2460 // If JVMTI original method ordering or sharing is enabled construct int
2461 // array remembering the original ordering
2462 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2463 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle));
2464 typeArrayHandle method_ordering(THREAD, new_ordering);
2465 for (int index = 0; index < length; index++) {
2466 methodOop m = methodOop(methods->obj_at(index));
2467 int old_index = m->vtable_index();
2468 assert(old_index >= 0 && old_index < length, "invalid method index");
2469 method_ordering->int_at_put(index, old_index);
2470 m->set_vtable_index(methodOopDesc::invalid_vtable_index);
2471 }
2472 return method_ordering;
2473 } else {
2474 return typeArrayHandle(THREAD, Universe::the_empty_int_array());
2475 }
2476 }
2479 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, TRAPS) {
2480 ClassFileStream* cfs = stream();
2481 cfs->guarantee_more(2, CHECK); // sourcefile_index
2482 u2 sourcefile_index = cfs->get_u2_fast();
2483 check_property(
2484 valid_cp_range(sourcefile_index, cp->length()) &&
2485 cp->tag_at(sourcefile_index).is_utf8(),
2486 "Invalid SourceFile attribute at constant pool index %u in class file %s",
2487 sourcefile_index, CHECK);
2488 set_class_sourcefile(cp->symbol_at(sourcefile_index));
2489 }
2493 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
2494 int length, TRAPS) {
2495 ClassFileStream* cfs = stream();
2496 u1* sde_buffer = cfs->get_u1_buffer();
2497 assert(sde_buffer != NULL, "null sde buffer");
2499 // Don't bother storing it if there is no way to retrieve it
2500 if (JvmtiExport::can_get_source_debug_extension()) {
2501 assert((length+1) > length, "Overflow checking");
2502 u1* sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2503 for (int i = 0; i < length; i++) {
2504 sde[i] = sde_buffer[i];
2505 }
2506 sde[length] = '\0';
2507 set_class_sde_buffer((char*)sde, length);
2508 }
2509 // Got utf8 string, set stream position forward
2510 cfs->skip_u1(length, CHECK);
2511 }
2514 // Inner classes can be static, private or protected (classic VM does this)
2515 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2517 // Return number of classes in the inner classes attribute table
2518 u2 ClassFileParser::parse_classfile_inner_classes_attribute(u1* inner_classes_attribute_start,
2519 bool parsed_enclosingmethod_attribute,
2520 u2 enclosing_method_class_index,
2521 u2 enclosing_method_method_index,
2522 constantPoolHandle cp,
2523 TRAPS) {
2524 ClassFileStream* cfs = stream();
2525 u1* current_mark = cfs->current();
2526 u2 length = 0;
2527 if (inner_classes_attribute_start != NULL) {
2528 cfs->set_current(inner_classes_attribute_start);
2529 cfs->guarantee_more(2, CHECK_0); // length
2530 length = cfs->get_u2_fast();
2531 }
2533 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2534 // method data:
2535 // [inner_class_info_index,
2536 // outer_class_info_index,
2537 // inner_name_index,
2538 // inner_class_access_flags,
2539 // ...
2540 // enclosing_method_class_index,
2541 // enclosing_method_method_index]
2542 int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2543 typeArrayOop ic = oopFactory::new_permanent_shortArray(size, CHECK_0);
2544 typeArrayHandle inner_classes(THREAD, ic);
2545 int index = 0;
2546 int cp_size = cp->length();
2547 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
2548 for (int n = 0; n < length; n++) {
2549 // Inner class index
2550 u2 inner_class_info_index = cfs->get_u2_fast();
2551 check_property(
2552 inner_class_info_index == 0 ||
2553 (valid_cp_range(inner_class_info_index, cp_size) &&
2554 is_klass_reference(cp, inner_class_info_index)),
2555 "inner_class_info_index %u has bad constant type in class file %s",
2556 inner_class_info_index, CHECK_0);
2557 // Outer class index
2558 u2 outer_class_info_index = cfs->get_u2_fast();
2559 check_property(
2560 outer_class_info_index == 0 ||
2561 (valid_cp_range(outer_class_info_index, cp_size) &&
2562 is_klass_reference(cp, outer_class_info_index)),
2563 "outer_class_info_index %u has bad constant type in class file %s",
2564 outer_class_info_index, CHECK_0);
2565 // Inner class name
2566 u2 inner_name_index = cfs->get_u2_fast();
2567 check_property(
2568 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) &&
2569 cp->tag_at(inner_name_index).is_utf8()),
2570 "inner_name_index %u has bad constant type in class file %s",
2571 inner_name_index, CHECK_0);
2572 if (_need_verify) {
2573 guarantee_property(inner_class_info_index != outer_class_info_index,
2574 "Class is both outer and inner class in class file %s", CHECK_0);
2575 }
2576 // Access flags
2577 AccessFlags inner_access_flags;
2578 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2579 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2580 // Set abstract bit for old class files for backward compatibility
2581 flags |= JVM_ACC_ABSTRACT;
2582 }
2583 verify_legal_class_modifiers(flags, CHECK_0);
2584 inner_access_flags.set_flags(flags);
2586 inner_classes->short_at_put(index++, inner_class_info_index);
2587 inner_classes->short_at_put(index++, outer_class_info_index);
2588 inner_classes->short_at_put(index++, inner_name_index);
2589 inner_classes->short_at_put(index++, inner_access_flags.as_short());
2590 }
2592 // 4347400: make sure there's no duplicate entry in the classes array
2593 if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2594 for(int i = 0; i < length * 4; i += 4) {
2595 for(int j = i + 4; j < length * 4; j += 4) {
2596 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) ||
2597 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) ||
2598 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) ||
2599 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)),
2600 "Duplicate entry in InnerClasses in class file %s",
2601 CHECK_0);
2602 }
2603 }
2604 }
2606 // Set EnclosingMethod class and method indexes.
2607 if (parsed_enclosingmethod_attribute) {
2608 inner_classes->short_at_put(index++, enclosing_method_class_index);
2609 inner_classes->short_at_put(index++, enclosing_method_method_index);
2610 }
2611 assert(index == size, "wrong size");
2613 // Update instanceKlass with inner class info.
2614 set_class_inner_classes(inner_classes);
2616 // Restore buffer's current position.
2617 cfs->set_current(current_mark);
2619 return length;
2620 }
2622 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, TRAPS) {
2623 set_class_synthetic_flag(true);
2624 }
2626 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, TRAPS) {
2627 ClassFileStream* cfs = stream();
2628 u2 signature_index = cfs->get_u2(CHECK);
2629 check_property(
2630 valid_cp_range(signature_index, cp->length()) &&
2631 cp->tag_at(signature_index).is_utf8(),
2632 "Invalid constant pool index %u in Signature attribute in class file %s",
2633 signature_index, CHECK);
2634 set_class_generic_signature(cp->symbol_at(signature_index));
2635 }
2637 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(constantPoolHandle cp,
2638 u4 attribute_byte_length, TRAPS) {
2639 ClassFileStream* cfs = stream();
2640 u1* current_start = cfs->current();
2642 cfs->guarantee_more(2, CHECK); // length
2643 int attribute_array_length = cfs->get_u2_fast();
2645 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2646 "Short length on BootstrapMethods in class file %s",
2647 CHECK);
2649 // The attribute contains a counted array of counted tuples of shorts,
2650 // represending bootstrap specifiers:
2651 // length*{bootstrap_method_index, argument_count*{argument_index}}
2652 int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2653 // operand_count = number of shorts in attr, except for leading length
2655 // The attribute is copied into a short[] array.
2656 // The array begins with a series of short[2] pairs, one for each tuple.
2657 int index_size = (attribute_array_length * 2);
2659 typeArrayOop operands_oop = oopFactory::new_permanent_intArray(index_size + operand_count, CHECK);
2660 typeArrayHandle operands(THREAD, operands_oop);
2661 operands_oop = NULL; // tidy
2663 int operand_fill_index = index_size;
2664 int cp_size = cp->length();
2666 for (int n = 0; n < attribute_array_length; n++) {
2667 // Store a 32-bit offset into the header of the operand array.
2668 assert(constantPoolOopDesc::operand_offset_at(operands(), n) == 0, "");
2669 constantPoolOopDesc::operand_offset_at_put(operands(), n, operand_fill_index);
2671 // Read a bootstrap specifier.
2672 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
2673 u2 bootstrap_method_index = cfs->get_u2_fast();
2674 u2 argument_count = cfs->get_u2_fast();
2675 check_property(
2676 valid_cp_range(bootstrap_method_index, cp_size) &&
2677 cp->tag_at(bootstrap_method_index).is_method_handle(),
2678 "bootstrap_method_index %u has bad constant type in class file %s",
2679 bootstrap_method_index,
2680 CHECK);
2681 operands->short_at_put(operand_fill_index++, bootstrap_method_index);
2682 operands->short_at_put(operand_fill_index++, argument_count);
2684 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
2685 for (int j = 0; j < argument_count; j++) {
2686 u2 argument_index = cfs->get_u2_fast();
2687 check_property(
2688 valid_cp_range(argument_index, cp_size) &&
2689 cp->tag_at(argument_index).is_loadable_constant(),
2690 "argument_index %u has bad constant type in class file %s",
2691 argument_index,
2692 CHECK);
2693 operands->short_at_put(operand_fill_index++, argument_index);
2694 }
2695 }
2697 assert(operand_fill_index == operands()->length(), "exact fill");
2698 assert(constantPoolOopDesc::operand_array_length(operands()) == attribute_array_length, "correct decode");
2700 u1* current_end = cfs->current();
2701 guarantee_property(current_end == current_start + attribute_byte_length,
2702 "Bad length on BootstrapMethods in class file %s",
2703 CHECK);
2705 cp->set_operands(operands());
2706 }
2709 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp,
2710 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
2711 TRAPS) {
2712 ClassFileStream* cfs = stream();
2713 // Set inner classes attribute to default sentinel
2714 set_class_inner_classes(typeArrayHandle(THREAD, Universe::the_empty_short_array()));
2715 cfs->guarantee_more(2, CHECK); // attributes_count
2716 u2 attributes_count = cfs->get_u2_fast();
2717 bool parsed_sourcefile_attribute = false;
2718 bool parsed_innerclasses_attribute = false;
2719 bool parsed_enclosingmethod_attribute = false;
2720 bool parsed_bootstrap_methods_attribute = false;
2721 u1* runtime_visible_annotations = NULL;
2722 int runtime_visible_annotations_length = 0;
2723 u1* runtime_invisible_annotations = NULL;
2724 int runtime_invisible_annotations_length = 0;
2725 u1* inner_classes_attribute_start = NULL;
2726 u4 inner_classes_attribute_length = 0;
2727 u2 enclosing_method_class_index = 0;
2728 u2 enclosing_method_method_index = 0;
2729 // Iterate over attributes
2730 while (attributes_count--) {
2731 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
2732 u2 attribute_name_index = cfs->get_u2_fast();
2733 u4 attribute_length = cfs->get_u4_fast();
2734 check_property(
2735 valid_cp_range(attribute_name_index, cp->length()) &&
2736 cp->tag_at(attribute_name_index).is_utf8(),
2737 "Attribute name has bad constant pool index %u in class file %s",
2738 attribute_name_index, CHECK);
2739 Symbol* tag = cp->symbol_at(attribute_name_index);
2740 if (tag == vmSymbols::tag_source_file()) {
2741 // Check for SourceFile tag
2742 if (_need_verify) {
2743 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2744 }
2745 if (parsed_sourcefile_attribute) {
2746 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2747 } else {
2748 parsed_sourcefile_attribute = true;
2749 }
2750 parse_classfile_sourcefile_attribute(cp, CHECK);
2751 } else if (tag == vmSymbols::tag_source_debug_extension()) {
2752 // Check for SourceDebugExtension tag
2753 parse_classfile_source_debug_extension_attribute(cp, (int)attribute_length, CHECK);
2754 } else if (tag == vmSymbols::tag_inner_classes()) {
2755 // Check for InnerClasses tag
2756 if (parsed_innerclasses_attribute) {
2757 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2758 } else {
2759 parsed_innerclasses_attribute = true;
2760 }
2761 inner_classes_attribute_start = cfs->get_u1_buffer();
2762 inner_classes_attribute_length = attribute_length;
2763 cfs->skip_u1(inner_classes_attribute_length, CHECK);
2764 } else if (tag == vmSymbols::tag_synthetic()) {
2765 // Check for Synthetic tag
2766 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2767 if (attribute_length != 0) {
2768 classfile_parse_error(
2769 "Invalid Synthetic classfile attribute length %u in class file %s",
2770 attribute_length, CHECK);
2771 }
2772 parse_classfile_synthetic_attribute(cp, CHECK);
2773 } else if (tag == vmSymbols::tag_deprecated()) {
2774 // Check for Deprecatd tag - 4276120
2775 if (attribute_length != 0) {
2776 classfile_parse_error(
2777 "Invalid Deprecated classfile attribute length %u in class file %s",
2778 attribute_length, CHECK);
2779 }
2780 } else if (_major_version >= JAVA_1_5_VERSION) {
2781 if (tag == vmSymbols::tag_signature()) {
2782 if (attribute_length != 2) {
2783 classfile_parse_error(
2784 "Wrong Signature attribute length %u in class file %s",
2785 attribute_length, CHECK);
2786 }
2787 parse_classfile_signature_attribute(cp, CHECK);
2788 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2789 runtime_visible_annotations_length = attribute_length;
2790 runtime_visible_annotations = cfs->get_u1_buffer();
2791 assert(runtime_visible_annotations != NULL, "null visible annotations");
2792 parse_annotations(runtime_visible_annotations,
2793 runtime_visible_annotations_length,
2794 cp,
2795 parsed_annotations,
2796 CHECK);
2797 cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2798 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
2799 runtime_invisible_annotations_length = attribute_length;
2800 runtime_invisible_annotations = cfs->get_u1_buffer();
2801 assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2802 cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
2803 } else if (tag == vmSymbols::tag_enclosing_method()) {
2804 if (parsed_enclosingmethod_attribute) {
2805 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2806 } else {
2807 parsed_enclosingmethod_attribute = true;
2808 }
2809 cfs->guarantee_more(4, CHECK); // class_index, method_index
2810 enclosing_method_class_index = cfs->get_u2_fast();
2811 enclosing_method_method_index = cfs->get_u2_fast();
2812 if (enclosing_method_class_index == 0) {
2813 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2814 }
2815 // Validate the constant pool indices and types
2816 if (!cp->is_within_bounds(enclosing_method_class_index) ||
2817 !is_klass_reference(cp, enclosing_method_class_index)) {
2818 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2819 }
2820 if (enclosing_method_method_index != 0 &&
2821 (!cp->is_within_bounds(enclosing_method_method_index) ||
2822 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
2823 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
2824 }
2825 } else if (tag == vmSymbols::tag_bootstrap_methods() &&
2826 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
2827 if (parsed_bootstrap_methods_attribute)
2828 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
2829 parsed_bootstrap_methods_attribute = true;
2830 parse_classfile_bootstrap_methods_attribute(cp, attribute_length, CHECK);
2831 } else {
2832 // Unknown attribute
2833 cfs->skip_u1(attribute_length, CHECK);
2834 }
2835 } else {
2836 // Unknown attribute
2837 cfs->skip_u1(attribute_length, CHECK);
2838 }
2839 }
2840 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations,
2841 runtime_visible_annotations_length,
2842 runtime_invisible_annotations,
2843 runtime_invisible_annotations_length,
2844 CHECK);
2845 set_class_annotations(annotations);
2847 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
2848 u2 num_of_classes = parse_classfile_inner_classes_attribute(
2849 inner_classes_attribute_start,
2850 parsed_innerclasses_attribute,
2851 enclosing_method_class_index,
2852 enclosing_method_method_index,
2853 cp, CHECK);
2854 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
2855 guarantee_property(
2856 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
2857 "Wrong InnerClasses attribute length in class file %s", CHECK);
2858 }
2859 }
2861 if (_max_bootstrap_specifier_index >= 0) {
2862 guarantee_property(parsed_bootstrap_methods_attribute,
2863 "Missing BootstrapMethods attribute in class file %s", CHECK);
2864 }
2865 }
2867 void ClassFileParser::apply_parsed_class_attributes(instanceKlassHandle k) {
2868 if (_synthetic_flag)
2869 k->set_is_synthetic();
2870 if (_sourcefile != NULL) {
2871 _sourcefile->increment_refcount();
2872 k->set_source_file_name(_sourcefile);
2873 }
2874 if (_generic_signature != NULL) {
2875 _generic_signature->increment_refcount();
2876 k->set_generic_signature(_generic_signature);
2877 }
2878 if (_sde_buffer != NULL) {
2879 k->set_source_debug_extension(_sde_buffer, _sde_length);
2880 }
2881 k->set_inner_classes(_inner_classes());
2882 k->set_class_annotations(_annotations());
2883 }
2885 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
2886 int runtime_visible_annotations_length,
2887 u1* runtime_invisible_annotations,
2888 int runtime_invisible_annotations_length, TRAPS) {
2889 typeArrayHandle annotations;
2890 if (runtime_visible_annotations != NULL ||
2891 runtime_invisible_annotations != NULL) {
2892 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length +
2893 runtime_invisible_annotations_length, CHECK_(annotations));
2894 annotations = typeArrayHandle(THREAD, anno);
2895 if (runtime_visible_annotations != NULL) {
2896 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length);
2897 }
2898 if (runtime_invisible_annotations != NULL) {
2899 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length);
2900 }
2901 }
2902 return annotations;
2903 }
2906 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
2907 Handle class_loader,
2908 Handle protection_domain,
2909 KlassHandle host_klass,
2910 GrowableArray<Handle>* cp_patches,
2911 TempNewSymbol& parsed_name,
2912 bool verify,
2913 TRAPS) {
2914 // When a retransformable agent is attached, JVMTI caches the
2915 // class bytes that existed before the first retransformation.
2916 // If RedefineClasses() was used before the retransformable
2917 // agent attached, then the cached class bytes may not be the
2918 // original class bytes.
2919 unsigned char *cached_class_file_bytes = NULL;
2920 jint cached_class_file_length;
2922 ClassFileStream* cfs = stream();
2923 // Timing
2924 assert(THREAD->is_Java_thread(), "must be a JavaThread");
2925 JavaThread* jt = (JavaThread*) THREAD;
2927 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
2928 ClassLoader::perf_class_parse_selftime(),
2929 NULL,
2930 jt->get_thread_stat()->perf_recursion_counts_addr(),
2931 jt->get_thread_stat()->perf_timers_addr(),
2932 PerfClassTraceTime::PARSE_CLASS);
2934 init_parsed_class_attributes();
2936 if (JvmtiExport::should_post_class_file_load_hook()) {
2937 // Get the cached class file bytes (if any) from the class that
2938 // is being redefined or retransformed. We use jvmti_thread_state()
2939 // instead of JvmtiThreadState::state_for(jt) so we don't allocate
2940 // a JvmtiThreadState any earlier than necessary. This will help
2941 // avoid the bug described by 7126851.
2942 JvmtiThreadState *state = jt->jvmti_thread_state();
2943 if (state != NULL) {
2944 KlassHandle *h_class_being_redefined =
2945 state->get_class_being_redefined();
2946 if (h_class_being_redefined != NULL) {
2947 instanceKlassHandle ikh_class_being_redefined =
2948 instanceKlassHandle(THREAD, (*h_class_being_redefined)());
2949 cached_class_file_bytes =
2950 ikh_class_being_redefined->get_cached_class_file_bytes();
2951 cached_class_file_length =
2952 ikh_class_being_redefined->get_cached_class_file_len();
2953 }
2954 }
2956 unsigned char* ptr = cfs->buffer();
2957 unsigned char* end_ptr = cfs->buffer() + cfs->length();
2959 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain,
2960 &ptr, &end_ptr,
2961 &cached_class_file_bytes,
2962 &cached_class_file_length);
2964 if (ptr != cfs->buffer()) {
2965 // JVMTI agent has modified class file data.
2966 // Set new class file stream using JVMTI agent modified
2967 // class file data.
2968 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
2969 set_stream(cfs);
2970 }
2971 }
2973 _host_klass = host_klass;
2974 _cp_patches = cp_patches;
2976 instanceKlassHandle nullHandle;
2978 // Figure out whether we can skip format checking (matching classic VM behavior)
2979 _need_verify = Verifier::should_verify_for(class_loader(), verify);
2981 // Set the verify flag in stream
2982 cfs->set_verify(_need_verify);
2984 // Save the class file name for easier error message printing.
2985 _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
2987 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
2988 // Magic value
2989 u4 magic = cfs->get_u4_fast();
2990 guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
2991 "Incompatible magic value %u in class file %s",
2992 magic, CHECK_(nullHandle));
2994 // Version numbers
2995 u2 minor_version = cfs->get_u2_fast();
2996 u2 major_version = cfs->get_u2_fast();
2998 // Check version numbers - we check this even with verifier off
2999 if (!is_supported_version(major_version, minor_version)) {
3000 if (name == NULL) {
3001 Exceptions::fthrow(
3002 THREAD_AND_LOCATION,
3003 vmSymbols::java_lang_UnsupportedClassVersionError(),
3004 "Unsupported major.minor version %u.%u",
3005 major_version,
3006 minor_version);
3007 } else {
3008 ResourceMark rm(THREAD);
3009 Exceptions::fthrow(
3010 THREAD_AND_LOCATION,
3011 vmSymbols::java_lang_UnsupportedClassVersionError(),
3012 "%s : Unsupported major.minor version %u.%u",
3013 name->as_C_string(),
3014 major_version,
3015 minor_version);
3016 }
3017 return nullHandle;
3018 }
3020 _major_version = major_version;
3021 _minor_version = minor_version;
3024 // Check if verification needs to be relaxed for this class file
3025 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
3026 _relax_verify = Verifier::relax_verify_for(class_loader());
3028 // Constant pool
3029 constantPoolHandle cp = parse_constant_pool(class_loader, CHECK_(nullHandle));
3030 ConstantPoolCleaner error_handler(cp); // set constant pool to be cleaned up.
3032 int cp_size = cp->length();
3034 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
3036 // Access flags
3037 AccessFlags access_flags;
3038 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
3040 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3041 // Set abstract bit for old class files for backward compatibility
3042 flags |= JVM_ACC_ABSTRACT;
3043 }
3044 verify_legal_class_modifiers(flags, CHECK_(nullHandle));
3045 access_flags.set_flags(flags);
3047 // This class and superclass
3048 instanceKlassHandle super_klass;
3049 u2 this_class_index = cfs->get_u2_fast();
3050 check_property(
3051 valid_cp_range(this_class_index, cp_size) &&
3052 cp->tag_at(this_class_index).is_unresolved_klass(),
3053 "Invalid this class index %u in constant pool in class file %s",
3054 this_class_index, CHECK_(nullHandle));
3056 Symbol* class_name = cp->unresolved_klass_at(this_class_index);
3057 assert(class_name != NULL, "class_name can't be null");
3059 // It's important to set parsed_name *before* resolving the super class.
3060 // (it's used for cleanup by the caller if parsing fails)
3061 parsed_name = class_name;
3062 // parsed_name is returned and can be used if there's an error, so add to
3063 // its reference count. Caller will decrement the refcount.
3064 parsed_name->increment_refcount();
3066 // Update _class_name which could be null previously to be class_name
3067 _class_name = class_name;
3069 // Don't need to check whether this class name is legal or not.
3070 // It has been checked when constant pool is parsed.
3071 // However, make sure it is not an array type.
3072 if (_need_verify) {
3073 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
3074 "Bad class name in class file %s",
3075 CHECK_(nullHandle));
3076 }
3078 klassOop preserve_this_klass; // for storing result across HandleMark
3080 // release all handles when parsing is done
3081 { HandleMark hm(THREAD);
3083 // Checks if name in class file matches requested name
3084 if (name != NULL && class_name != name) {
3085 ResourceMark rm(THREAD);
3086 Exceptions::fthrow(
3087 THREAD_AND_LOCATION,
3088 vmSymbols::java_lang_NoClassDefFoundError(),
3089 "%s (wrong name: %s)",
3090 name->as_C_string(),
3091 class_name->as_C_string()
3092 );
3093 return nullHandle;
3094 }
3096 if (TraceClassLoadingPreorder) {
3097 tty->print("[Loading %s", name->as_klass_external_name());
3098 if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
3099 tty->print_cr("]");
3100 }
3102 u2 super_class_index = cfs->get_u2_fast();
3103 if (super_class_index == 0) {
3104 check_property(class_name == vmSymbols::java_lang_Object(),
3105 "Invalid superclass index %u in class file %s",
3106 super_class_index,
3107 CHECK_(nullHandle));
3108 } else {
3109 check_property(valid_cp_range(super_class_index, cp_size) &&
3110 is_klass_reference(cp, super_class_index),
3111 "Invalid superclass index %u in class file %s",
3112 super_class_index,
3113 CHECK_(nullHandle));
3114 // The class name should be legal because it is checked when parsing constant pool.
3115 // However, make sure it is not an array type.
3116 bool is_array = false;
3117 if (cp->tag_at(super_class_index).is_klass()) {
3118 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index));
3119 if (_need_verify)
3120 is_array = super_klass->oop_is_array();
3121 } else if (_need_verify) {
3122 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3123 }
3124 if (_need_verify) {
3125 guarantee_property(!is_array,
3126 "Bad superclass name in class file %s", CHECK_(nullHandle));
3127 }
3128 }
3130 // Interfaces
3131 u2 itfs_len = cfs->get_u2_fast();
3132 objArrayHandle local_interfaces;
3133 if (itfs_len == 0) {
3134 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
3135 } else {
3136 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle));
3137 }
3139 u2 java_fields_count = 0;
3140 // Fields (offsets are filled in later)
3141 FieldAllocationCount fac;
3142 objArrayHandle fields_annotations;
3143 typeArrayHandle fields = parse_fields(class_name, cp, access_flags.is_interface(), &fac, &fields_annotations,
3144 &java_fields_count,
3145 CHECK_(nullHandle));
3146 // Methods
3147 bool has_final_method = false;
3148 AccessFlags promoted_flags;
3149 promoted_flags.set_flags(0);
3150 // These need to be oop pointers because they are allocated lazily
3151 // inside parse_methods inside a nested HandleMark
3152 objArrayOop methods_annotations_oop = NULL;
3153 objArrayOop methods_parameter_annotations_oop = NULL;
3154 objArrayOop methods_default_annotations_oop = NULL;
3155 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(),
3156 &promoted_flags,
3157 &has_final_method,
3158 &methods_annotations_oop,
3159 &methods_parameter_annotations_oop,
3160 &methods_default_annotations_oop,
3161 CHECK_(nullHandle));
3163 objArrayHandle methods_annotations(THREAD, methods_annotations_oop);
3164 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop);
3165 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop);
3167 // Additional attributes
3168 ClassAnnotationCollector parsed_annotations;
3169 parse_classfile_attributes(cp, &parsed_annotations, CHECK_(nullHandle));
3171 // Make sure this is the end of class file stream
3172 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
3174 // We check super class after class file is parsed and format is checked
3175 if (super_class_index > 0 && super_klass.is_null()) {
3176 Symbol* sk = cp->klass_name_at(super_class_index);
3177 if (access_flags.is_interface()) {
3178 // Before attempting to resolve the superclass, check for class format
3179 // errors not checked yet.
3180 guarantee_property(sk == vmSymbols::java_lang_Object(),
3181 "Interfaces must have java.lang.Object as superclass in class file %s",
3182 CHECK_(nullHandle));
3183 }
3184 klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
3185 sk,
3186 class_loader,
3187 protection_domain,
3188 true,
3189 CHECK_(nullHandle));
3191 KlassHandle kh (THREAD, k);
3192 super_klass = instanceKlassHandle(THREAD, kh());
3193 if (LinkWellKnownClasses) // my super class is well known to me
3194 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve
3195 }
3196 if (super_klass.not_null()) {
3197 if (super_klass->is_interface()) {
3198 ResourceMark rm(THREAD);
3199 Exceptions::fthrow(
3200 THREAD_AND_LOCATION,
3201 vmSymbols::java_lang_IncompatibleClassChangeError(),
3202 "class %s has interface %s as super class",
3203 class_name->as_klass_external_name(),
3204 super_klass->external_name()
3205 );
3206 return nullHandle;
3207 }
3208 // Make sure super class is not final
3209 if (super_klass->is_final()) {
3210 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
3211 }
3212 }
3214 // Compute the transitive list of all unique interfaces implemented by this class
3215 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
3217 // sort methods
3218 typeArrayHandle method_ordering = sort_methods(methods,
3219 methods_annotations,
3220 methods_parameter_annotations,
3221 methods_default_annotations,
3222 CHECK_(nullHandle));
3224 // promote flags from parse_methods() to the klass' flags
3225 access_flags.add_promoted_flags(promoted_flags.as_int());
3227 // Size of Java vtable (in words)
3228 int vtable_size = 0;
3229 int itable_size = 0;
3230 int num_miranda_methods = 0;
3232 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size,
3233 num_miranda_methods,
3234 super_klass(),
3235 methods(),
3236 access_flags,
3237 class_loader,
3238 class_name,
3239 local_interfaces(),
3240 CHECK_(nullHandle));
3242 // Size of Java itable (in words)
3243 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces);
3245 // Field size and offset computation
3246 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
3247 #ifndef PRODUCT
3248 int orig_nonstatic_field_size = 0;
3249 #endif
3250 int static_field_size = 0;
3251 int next_static_oop_offset;
3252 int next_static_double_offset;
3253 int next_static_word_offset;
3254 int next_static_short_offset;
3255 int next_static_byte_offset;
3256 int next_static_type_offset;
3257 int next_nonstatic_oop_offset;
3258 int next_nonstatic_double_offset;
3259 int next_nonstatic_word_offset;
3260 int next_nonstatic_short_offset;
3261 int next_nonstatic_byte_offset;
3262 int next_nonstatic_type_offset;
3263 int first_nonstatic_oop_offset;
3264 int first_nonstatic_field_offset;
3265 int next_nonstatic_field_offset;
3267 // Calculate the starting byte offsets
3268 next_static_oop_offset = instanceMirrorKlass::offset_of_static_fields();
3269 next_static_double_offset = next_static_oop_offset +
3270 (fac.count[STATIC_OOP] * heapOopSize);
3271 if ( fac.count[STATIC_DOUBLE] &&
3272 (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3273 Universe::field_type_should_be_aligned(T_LONG)) ) {
3274 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3275 }
3277 next_static_word_offset = next_static_double_offset +
3278 (fac.count[STATIC_DOUBLE] * BytesPerLong);
3279 next_static_short_offset = next_static_word_offset +
3280 (fac.count[STATIC_WORD] * BytesPerInt);
3281 next_static_byte_offset = next_static_short_offset +
3282 (fac.count[STATIC_SHORT] * BytesPerShort);
3283 next_static_type_offset = align_size_up((next_static_byte_offset +
3284 fac.count[STATIC_BYTE] ), wordSize );
3285 static_field_size = (next_static_type_offset -
3286 next_static_oop_offset) / wordSize;
3288 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() +
3289 nonstatic_field_size * heapOopSize;
3290 next_nonstatic_field_offset = first_nonstatic_field_offset;
3292 unsigned int nonstatic_double_count = fac.count[NONSTATIC_DOUBLE];
3293 unsigned int nonstatic_word_count = fac.count[NONSTATIC_WORD];
3294 unsigned int nonstatic_short_count = fac.count[NONSTATIC_SHORT];
3295 unsigned int nonstatic_byte_count = fac.count[NONSTATIC_BYTE];
3296 unsigned int nonstatic_oop_count = fac.count[NONSTATIC_OOP];
3298 bool super_has_nonstatic_fields =
3299 (super_klass() != NULL && super_klass->has_nonstatic_fields());
3300 bool has_nonstatic_fields = super_has_nonstatic_fields ||
3301 ((nonstatic_double_count + nonstatic_word_count +
3302 nonstatic_short_count + nonstatic_byte_count +
3303 nonstatic_oop_count) != 0);
3306 // Prepare list of oops for oop map generation.
3307 int* nonstatic_oop_offsets;
3308 unsigned int* nonstatic_oop_counts;
3309 unsigned int nonstatic_oop_map_count = 0;
3311 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3312 THREAD, int, nonstatic_oop_count + 1);
3313 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
3314 THREAD, unsigned int, nonstatic_oop_count + 1);
3316 first_nonstatic_oop_offset = 0; // will be set for first oop field
3318 #ifndef PRODUCT
3319 if( PrintCompactFieldsSavings ) {
3320 next_nonstatic_double_offset = next_nonstatic_field_offset +
3321 (nonstatic_oop_count * heapOopSize);
3322 if ( nonstatic_double_count > 0 ) {
3323 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
3324 }
3325 next_nonstatic_word_offset = next_nonstatic_double_offset +
3326 (nonstatic_double_count * BytesPerLong);
3327 next_nonstatic_short_offset = next_nonstatic_word_offset +
3328 (nonstatic_word_count * BytesPerInt);
3329 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3330 (nonstatic_short_count * BytesPerShort);
3331 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset +
3332 nonstatic_byte_count ), heapOopSize );
3333 orig_nonstatic_field_size = nonstatic_field_size +
3334 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize);
3335 }
3336 #endif
3337 bool compact_fields = CompactFields;
3338 int allocation_style = FieldsAllocationStyle;
3339 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3340 assert(false, "0 <= FieldsAllocationStyle <= 2");
3341 allocation_style = 1; // Optimistic
3342 }
3344 // The next classes have predefined hard-coded fields offsets
3345 // (see in JavaClasses::compute_hard_coded_offsets()).
3346 // Use default fields allocation order for them.
3347 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3348 (class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3349 class_name == vmSymbols::java_lang_Class() ||
3350 class_name == vmSymbols::java_lang_ClassLoader() ||
3351 class_name == vmSymbols::java_lang_ref_Reference() ||
3352 class_name == vmSymbols::java_lang_ref_SoftReference() ||
3353 class_name == vmSymbols::java_lang_StackTraceElement() ||
3354 class_name == vmSymbols::java_lang_String() ||
3355 class_name == vmSymbols::java_lang_Throwable() ||
3356 class_name == vmSymbols::java_lang_Boolean() ||
3357 class_name == vmSymbols::java_lang_Character() ||
3358 class_name == vmSymbols::java_lang_Float() ||
3359 class_name == vmSymbols::java_lang_Double() ||
3360 class_name == vmSymbols::java_lang_Byte() ||
3361 class_name == vmSymbols::java_lang_Short() ||
3362 class_name == vmSymbols::java_lang_Integer() ||
3363 class_name == vmSymbols::java_lang_Long())) {
3364 allocation_style = 0; // Allocate oops first
3365 compact_fields = false; // Don't compact fields
3366 }
3368 if( allocation_style == 0 ) {
3369 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes
3370 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3371 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3372 (nonstatic_oop_count * heapOopSize);
3373 } else if( allocation_style == 1 ) {
3374 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops
3375 next_nonstatic_double_offset = next_nonstatic_field_offset;
3376 } else if( allocation_style == 2 ) {
3377 // Fields allocation: oops fields in super and sub classes are together.
3378 if( nonstatic_field_size > 0 && super_klass() != NULL &&
3379 super_klass->nonstatic_oop_map_size() > 0 ) {
3380 int map_count = super_klass->nonstatic_oop_map_count();
3381 OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps();
3382 OopMapBlock* last_map = first_map + map_count - 1;
3383 int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3384 if (next_offset == next_nonstatic_field_offset) {
3385 allocation_style = 0; // allocate oops first
3386 next_nonstatic_oop_offset = next_nonstatic_field_offset;
3387 next_nonstatic_double_offset = next_nonstatic_oop_offset +
3388 (nonstatic_oop_count * heapOopSize);
3389 }
3390 }
3391 if( allocation_style == 2 ) {
3392 allocation_style = 1; // allocate oops last
3393 next_nonstatic_double_offset = next_nonstatic_field_offset;
3394 }
3395 } else {
3396 ShouldNotReachHere();
3397 }
3399 int nonstatic_oop_space_count = 0;
3400 int nonstatic_word_space_count = 0;
3401 int nonstatic_short_space_count = 0;
3402 int nonstatic_byte_space_count = 0;
3403 int nonstatic_oop_space_offset;
3404 int nonstatic_word_space_offset;
3405 int nonstatic_short_space_offset;
3406 int nonstatic_byte_space_offset;
3408 if( nonstatic_double_count > 0 ) {
3409 int offset = next_nonstatic_double_offset;
3410 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3411 if( compact_fields && offset != next_nonstatic_double_offset ) {
3412 // Allocate available fields into the gap before double field.
3413 int length = next_nonstatic_double_offset - offset;
3414 assert(length == BytesPerInt, "");
3415 nonstatic_word_space_offset = offset;
3416 if( nonstatic_word_count > 0 ) {
3417 nonstatic_word_count -= 1;
3418 nonstatic_word_space_count = 1; // Only one will fit
3419 length -= BytesPerInt;
3420 offset += BytesPerInt;
3421 }
3422 nonstatic_short_space_offset = offset;
3423 while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3424 nonstatic_short_count -= 1;
3425 nonstatic_short_space_count += 1;
3426 length -= BytesPerShort;
3427 offset += BytesPerShort;
3428 }
3429 nonstatic_byte_space_offset = offset;
3430 while( length > 0 && nonstatic_byte_count > 0 ) {
3431 nonstatic_byte_count -= 1;
3432 nonstatic_byte_space_count += 1;
3433 length -= 1;
3434 }
3435 // Allocate oop field in the gap if there are no other fields for that.
3436 nonstatic_oop_space_offset = offset;
3437 if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3438 allocation_style != 0 ) { // when oop fields not first
3439 nonstatic_oop_count -= 1;
3440 nonstatic_oop_space_count = 1; // Only one will fit
3441 length -= heapOopSize;
3442 offset += heapOopSize;
3443 }
3444 }
3445 }
3447 next_nonstatic_word_offset = next_nonstatic_double_offset +
3448 (nonstatic_double_count * BytesPerLong);
3449 next_nonstatic_short_offset = next_nonstatic_word_offset +
3450 (nonstatic_word_count * BytesPerInt);
3451 next_nonstatic_byte_offset = next_nonstatic_short_offset +
3452 (nonstatic_short_count * BytesPerShort);
3454 int notaligned_offset;
3455 if( allocation_style == 0 ) {
3456 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3457 } else { // allocation_style == 1
3458 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3459 if( nonstatic_oop_count > 0 ) {
3460 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3461 }
3462 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3463 }
3464 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize );
3465 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
3466 - first_nonstatic_field_offset)/heapOopSize);
3468 // Iterate over fields again and compute correct offsets.
3469 // The field allocation type was temporarily stored in the offset slot.
3470 // oop fields are located before non-oop fields (static and non-static).
3471 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3472 int real_offset;
3473 FieldAllocationType atype = (FieldAllocationType) fs.offset();
3474 switch (atype) {
3475 case STATIC_OOP:
3476 real_offset = next_static_oop_offset;
3477 next_static_oop_offset += heapOopSize;
3478 break;
3479 case STATIC_BYTE:
3480 real_offset = next_static_byte_offset;
3481 next_static_byte_offset += 1;
3482 break;
3483 case STATIC_SHORT:
3484 real_offset = next_static_short_offset;
3485 next_static_short_offset += BytesPerShort;
3486 break;
3487 case STATIC_WORD:
3488 real_offset = next_static_word_offset;
3489 next_static_word_offset += BytesPerInt;
3490 break;
3491 case STATIC_DOUBLE:
3492 real_offset = next_static_double_offset;
3493 next_static_double_offset += BytesPerLong;
3494 break;
3495 case NONSTATIC_OOP:
3496 if( nonstatic_oop_space_count > 0 ) {
3497 real_offset = nonstatic_oop_space_offset;
3498 nonstatic_oop_space_offset += heapOopSize;
3499 nonstatic_oop_space_count -= 1;
3500 } else {
3501 real_offset = next_nonstatic_oop_offset;
3502 next_nonstatic_oop_offset += heapOopSize;
3503 }
3504 // Update oop maps
3505 if( nonstatic_oop_map_count > 0 &&
3506 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3507 real_offset -
3508 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3509 heapOopSize ) {
3510 // Extend current oop map
3511 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3512 } else {
3513 // Create new oop map
3514 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3515 nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3516 nonstatic_oop_map_count += 1;
3517 if( first_nonstatic_oop_offset == 0 ) { // Undefined
3518 first_nonstatic_oop_offset = real_offset;
3519 }
3520 }
3521 break;
3522 case NONSTATIC_BYTE:
3523 if( nonstatic_byte_space_count > 0 ) {
3524 real_offset = nonstatic_byte_space_offset;
3525 nonstatic_byte_space_offset += 1;
3526 nonstatic_byte_space_count -= 1;
3527 } else {
3528 real_offset = next_nonstatic_byte_offset;
3529 next_nonstatic_byte_offset += 1;
3530 }
3531 break;
3532 case NONSTATIC_SHORT:
3533 if( nonstatic_short_space_count > 0 ) {
3534 real_offset = nonstatic_short_space_offset;
3535 nonstatic_short_space_offset += BytesPerShort;
3536 nonstatic_short_space_count -= 1;
3537 } else {
3538 real_offset = next_nonstatic_short_offset;
3539 next_nonstatic_short_offset += BytesPerShort;
3540 }
3541 break;
3542 case NONSTATIC_WORD:
3543 if( nonstatic_word_space_count > 0 ) {
3544 real_offset = nonstatic_word_space_offset;
3545 nonstatic_word_space_offset += BytesPerInt;
3546 nonstatic_word_space_count -= 1;
3547 } else {
3548 real_offset = next_nonstatic_word_offset;
3549 next_nonstatic_word_offset += BytesPerInt;
3550 }
3551 break;
3552 case NONSTATIC_DOUBLE:
3553 real_offset = next_nonstatic_double_offset;
3554 next_nonstatic_double_offset += BytesPerLong;
3555 break;
3556 default:
3557 ShouldNotReachHere();
3558 }
3559 fs.set_offset(real_offset);
3560 }
3562 // Size of instances
3563 int instance_size;
3565 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
3566 instance_size = align_object_size(next_nonstatic_type_offset / wordSize);
3568 assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value");
3570 // Number of non-static oop map blocks allocated at end of klass.
3571 const unsigned int total_oop_map_count =
3572 compute_oop_map_count(super_klass, nonstatic_oop_map_count,
3573 first_nonstatic_oop_offset);
3575 // Compute reference type
3576 ReferenceType rt;
3577 if (super_klass() == NULL) {
3578 rt = REF_NONE;
3579 } else {
3580 rt = super_klass->reference_type();
3581 }
3583 // We can now create the basic klassOop for this klass
3584 klassOop ik = oopFactory::new_instanceKlass(name, vtable_size, itable_size,
3585 static_field_size,
3586 total_oop_map_count,
3587 access_flags,
3588 rt, host_klass,
3589 CHECK_(nullHandle));
3590 instanceKlassHandle this_klass (THREAD, ik);
3592 assert(this_klass->static_field_size() == static_field_size, "sanity");
3593 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count,
3594 "sanity");
3596 // Fill in information already parsed
3597 this_klass->set_should_verify_class(verify);
3598 jint lh = Klass::instance_layout_helper(instance_size, false);
3599 this_klass->set_layout_helper(lh);
3600 assert(this_klass->oop_is_instance(), "layout is correct");
3601 assert(this_klass->size_helper() == instance_size, "correct size_helper");
3602 // Not yet: supers are done below to support the new subtype-checking fields
3603 //this_klass->set_super(super_klass());
3604 this_klass->set_class_loader(class_loader());
3605 this_klass->set_nonstatic_field_size(nonstatic_field_size);
3606 this_klass->set_has_nonstatic_fields(has_nonstatic_fields);
3607 this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
3608 cp->set_pool_holder(this_klass());
3609 error_handler.set_in_error(false); // turn off error handler for cp
3610 this_klass->set_constants(cp());
3611 this_klass->set_local_interfaces(local_interfaces());
3612 this_klass->set_fields(fields(), java_fields_count);
3613 this_klass->set_methods(methods());
3614 if (has_final_method) {
3615 this_klass->set_has_final_method();
3616 }
3617 this_klass->set_method_ordering(method_ordering());
3618 // The instanceKlass::_methods_jmethod_ids cache and the
3619 // instanceKlass::_methods_cached_itable_indices cache are
3620 // both managed on the assumption that the initial cache
3621 // size is equal to the number of methods in the class. If
3622 // that changes, then instanceKlass::idnum_can_increment()
3623 // has to be changed accordingly.
3624 this_klass->set_initial_method_idnum(methods->length());
3625 this_klass->set_name(cp->klass_name_at(this_class_index));
3626 if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself
3627 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
3628 this_klass->set_protection_domain(protection_domain());
3629 this_klass->set_fields_annotations(fields_annotations());
3630 this_klass->set_methods_annotations(methods_annotations());
3631 this_klass->set_methods_parameter_annotations(methods_parameter_annotations());
3632 this_klass->set_methods_default_annotations(methods_default_annotations());
3634 this_klass->set_minor_version(minor_version);
3635 this_klass->set_major_version(major_version);
3637 // Set up methodOop::intrinsic_id as soon as we know the names of methods.
3638 // (We used to do this lazily, but now we query it in Rewriter,
3639 // which is eagerly done for every method, so we might as well do it now,
3640 // when everything is fresh in memory.)
3641 if (methodOopDesc::klass_id_for_intrinsics(this_klass->as_klassOop()) != vmSymbols::NO_SID) {
3642 for (int j = 0; j < methods->length(); j++) {
3643 ((methodOop)methods->obj_at(j))->init_intrinsic_id();
3644 }
3645 }
3647 if (cached_class_file_bytes != NULL) {
3648 // JVMTI: we have an instanceKlass now, tell it about the cached bytes
3649 this_klass->set_cached_class_file(cached_class_file_bytes,
3650 cached_class_file_length);
3651 }
3653 // Miranda methods
3654 if ((num_miranda_methods > 0) ||
3655 // if this class introduced new miranda methods or
3656 (super_klass.not_null() && (super_klass->has_miranda_methods()))
3657 // super class exists and this class inherited miranda methods
3658 ) {
3659 this_klass->set_has_miranda_methods(); // then set a flag
3660 }
3662 // Fill in field values obtained by parse_classfile_attributes
3663 if (parsed_annotations.has_any_annotations())
3664 parsed_annotations.apply_to(this_klass);
3665 apply_parsed_class_attributes(this_klass);
3667 // VerifyOops believes that once this has been set, the object is completely loaded.
3668 // Compute transitive closure of interfaces this class implements
3669 this_klass->set_transitive_interfaces(transitive_interfaces());
3671 // Fill in information needed to compute superclasses.
3672 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
3674 // Initialize itable offset tables
3675 klassItable::setup_itable_offset_table(this_klass);
3677 // Do final class setup
3678 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts);
3680 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
3681 set_precomputed_flags(this_klass);
3683 // reinitialize modifiers, using the InnerClasses attribute
3684 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
3685 this_klass->set_modifier_flags(computed_modifiers);
3687 // check if this class can access its super class
3688 check_super_class_access(this_klass, CHECK_(nullHandle));
3690 // check if this class can access its superinterfaces
3691 check_super_interface_access(this_klass, CHECK_(nullHandle));
3693 // check if this class overrides any final method
3694 check_final_method_override(this_klass, CHECK_(nullHandle));
3696 // check that if this class is an interface then it doesn't have static methods
3697 if (this_klass->is_interface()) {
3698 check_illegal_static_method(this_klass, CHECK_(nullHandle));
3699 }
3701 // Allocate mirror and initialize static fields
3702 java_lang_Class::create_mirror(this_klass, CHECK_(nullHandle));
3704 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()),
3705 false /* not shared class */);
3707 if (TraceClassLoading) {
3708 // print in a single call to reduce interleaving of output
3709 if (cfs->source() != NULL) {
3710 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3711 cfs->source());
3712 } else if (class_loader.is_null()) {
3713 if (THREAD->is_Java_thread()) {
3714 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
3715 tty->print("[Loaded %s by instance of %s]\n",
3716 this_klass->external_name(),
3717 instanceKlass::cast(caller)->external_name());
3718 } else {
3719 tty->print("[Loaded %s]\n", this_klass->external_name());
3720 }
3721 } else {
3722 ResourceMark rm;
3723 tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3724 instanceKlass::cast(class_loader->klass())->external_name());
3725 }
3726 }
3728 if (TraceClassResolution) {
3729 // print out the superclass.
3730 const char * from = Klass::cast(this_klass())->external_name();
3731 if (this_klass->java_super() != NULL) {
3732 tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name());
3733 }
3734 // print out each of the interface classes referred to by this class.
3735 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces());
3736 if (!local_interfaces.is_null()) {
3737 int length = local_interfaces->length();
3738 for (int i = 0; i < length; i++) {
3739 klassOop k = klassOop(local_interfaces->obj_at(i));
3740 instanceKlass* to_class = instanceKlass::cast(k);
3741 const char * to = to_class->external_name();
3742 tty->print("RESOLVE %s %s (interface)\n", from, to);
3743 }
3744 }
3745 }
3747 #ifndef PRODUCT
3748 if( PrintCompactFieldsSavings ) {
3749 if( nonstatic_field_size < orig_nonstatic_field_size ) {
3750 tty->print("[Saved %d of %d bytes in %s]\n",
3751 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize,
3752 orig_nonstatic_field_size*heapOopSize,
3753 this_klass->external_name());
3754 } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
3755 tty->print("[Wasted %d over %d bytes in %s]\n",
3756 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize,
3757 orig_nonstatic_field_size*heapOopSize,
3758 this_klass->external_name());
3759 }
3760 }
3761 #endif
3763 // preserve result across HandleMark
3764 preserve_this_klass = this_klass();
3765 }
3767 // Create new handle outside HandleMark
3768 instanceKlassHandle this_klass (THREAD, preserve_this_klass);
3769 debug_only(this_klass->as_klassOop()->verify();)
3771 return this_klass;
3772 }
3775 unsigned int
3776 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
3777 unsigned int nonstatic_oop_map_count,
3778 int first_nonstatic_oop_offset) {
3779 unsigned int map_count =
3780 super.is_null() ? 0 : super->nonstatic_oop_map_count();
3781 if (nonstatic_oop_map_count > 0) {
3782 // We have oops to add to map
3783 if (map_count == 0) {
3784 map_count = nonstatic_oop_map_count;
3785 } else {
3786 // Check whether we should add a new map block or whether the last one can
3787 // be extended
3788 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3789 OopMapBlock* const last_map = first_map + map_count - 1;
3791 int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3792 if (next_offset == first_nonstatic_oop_offset) {
3793 // There is no gap bettwen superklass's last oop field and first
3794 // local oop field, merge maps.
3795 nonstatic_oop_map_count -= 1;
3796 } else {
3797 // Superklass didn't end with a oop field, add extra maps
3798 assert(next_offset < first_nonstatic_oop_offset, "just checking");
3799 }
3800 map_count += nonstatic_oop_map_count;
3801 }
3802 }
3803 return map_count;
3804 }
3807 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
3808 unsigned int nonstatic_oop_map_count,
3809 int* nonstatic_oop_offsets,
3810 unsigned int* nonstatic_oop_counts) {
3811 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
3812 const instanceKlass* const super = k->superklass();
3813 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
3814 if (super_count > 0) {
3815 // Copy maps from superklass
3816 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
3817 for (unsigned int i = 0; i < super_count; ++i) {
3818 *this_oop_map++ = *super_oop_map++;
3819 }
3820 }
3822 if (nonstatic_oop_map_count > 0) {
3823 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
3824 // The counts differ because there is no gap between superklass's last oop
3825 // field and the first local oop field. Extend the last oop map copied
3826 // from the superklass instead of creating new one.
3827 nonstatic_oop_map_count--;
3828 nonstatic_oop_offsets++;
3829 this_oop_map--;
3830 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
3831 this_oop_map++;
3832 }
3834 // Add new map blocks, fill them
3835 while (nonstatic_oop_map_count-- > 0) {
3836 this_oop_map->set_offset(*nonstatic_oop_offsets++);
3837 this_oop_map->set_count(*nonstatic_oop_counts++);
3838 this_oop_map++;
3839 }
3840 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
3841 this_oop_map, "sanity");
3842 }
3843 }
3846 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
3847 klassOop super = k->super();
3849 // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3850 // in which case we don't have to register objects as finalizable
3851 if (!_has_empty_finalizer) {
3852 if (_has_finalizer ||
3853 (super != NULL && super->klass_part()->has_finalizer())) {
3854 k->set_has_finalizer();
3855 }
3856 }
3858 #ifdef ASSERT
3859 bool f = false;
3860 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(),
3861 vmSymbols::void_method_signature());
3862 if (m != NULL && !m->is_empty_method()) {
3863 f = true;
3864 }
3865 assert(f == k->has_finalizer(), "inconsistent has_finalizer");
3866 #endif
3868 // Check if this klass supports the java.lang.Cloneable interface
3869 if (SystemDictionary::Cloneable_klass_loaded()) {
3870 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
3871 k->set_is_cloneable();
3872 }
3873 }
3875 // Check if this klass has a vanilla default constructor
3876 if (super == NULL) {
3877 // java.lang.Object has empty default constructor
3878 k->set_has_vanilla_constructor();
3879 } else {
3880 if (Klass::cast(super)->has_vanilla_constructor() &&
3881 _has_vanilla_constructor) {
3882 k->set_has_vanilla_constructor();
3883 }
3884 #ifdef ASSERT
3885 bool v = false;
3886 if (Klass::cast(super)->has_vanilla_constructor()) {
3887 methodOop constructor = k->find_method(vmSymbols::object_initializer_name(
3888 ), vmSymbols::void_method_signature());
3889 if (constructor != NULL && constructor->is_vanilla_constructor()) {
3890 v = true;
3891 }
3892 }
3893 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
3894 #endif
3895 }
3897 // If it cannot be fast-path allocated, set a bit in the layout helper.
3898 // See documentation of instanceKlass::can_be_fastpath_allocated().
3899 assert(k->size_helper() > 0, "layout_helper is initialized");
3900 if ((!RegisterFinalizersAtInit && k->has_finalizer())
3901 || k->is_abstract() || k->is_interface()
3902 || (k->name() == vmSymbols::java_lang_Class()
3903 && k->class_loader() == NULL)
3904 || k->size_helper() >= FastAllocateSizeLimit) {
3905 // Forbid fast-path allocation.
3906 jint lh = Klass::instance_layout_helper(k->size_helper(), true);
3907 k->set_layout_helper(lh);
3908 }
3909 }
3912 // utility method for appending and array with check for duplicates
3914 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) {
3915 // iterate over new interfaces
3916 for (int i = 0; i < ifs->length(); i++) {
3917 oop e = ifs->obj_at(i);
3918 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking");
3919 // check for duplicates
3920 bool duplicate = false;
3921 for (int j = 0; j < index; j++) {
3922 if (result->obj_at(j) == e) {
3923 duplicate = true;
3924 break;
3925 }
3926 }
3927 // add new interface
3928 if (!duplicate) {
3929 result->obj_at_put(index++, e);
3930 }
3931 }
3932 }
3934 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) {
3935 // Compute maximum size for transitive interfaces
3936 int max_transitive_size = 0;
3937 int super_size = 0;
3938 // Add superclass transitive interfaces size
3939 if (super.not_null()) {
3940 super_size = super->transitive_interfaces()->length();
3941 max_transitive_size += super_size;
3942 }
3943 // Add local interfaces' super interfaces
3944 int local_size = local_ifs->length();
3945 for (int i = 0; i < local_size; i++) {
3946 klassOop l = klassOop(local_ifs->obj_at(i));
3947 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length();
3948 }
3949 // Finally add local interfaces
3950 max_transitive_size += local_size;
3951 // Construct array
3952 objArrayHandle result;
3953 if (max_transitive_size == 0) {
3954 // no interfaces, use canonicalized array
3955 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
3956 } else if (max_transitive_size == super_size) {
3957 // no new local interfaces added, share superklass' transitive interface array
3958 result = objArrayHandle(THREAD, super->transitive_interfaces());
3959 } else if (max_transitive_size == local_size) {
3960 // only local interfaces added, share local interface array
3961 result = local_ifs;
3962 } else {
3963 objArrayHandle nullHandle;
3964 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle));
3965 result = objArrayHandle(THREAD, new_objarray);
3966 int index = 0;
3967 // Copy down from superclass
3968 if (super.not_null()) {
3969 append_interfaces(result, index, super->transitive_interfaces());
3970 }
3971 // Copy down from local interfaces' superinterfaces
3972 for (int i = 0; i < local_ifs->length(); i++) {
3973 klassOop l = klassOop(local_ifs->obj_at(i));
3974 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces());
3975 }
3976 // Finally add local interfaces
3977 append_interfaces(result, index, local_ifs());
3979 // Check if duplicates were removed
3980 if (index != max_transitive_size) {
3981 assert(index < max_transitive_size, "just checking");
3982 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle));
3983 for (int i = 0; i < index; i++) {
3984 oop e = result->obj_at(i);
3985 assert(e != NULL, "just checking");
3986 new_result->obj_at_put(i, e);
3987 }
3988 result = objArrayHandle(THREAD, new_result);
3989 }
3990 }
3991 return result;
3992 }
3995 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
3996 klassOop super = this_klass->super();
3997 if ((super != NULL) &&
3998 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) {
3999 ResourceMark rm(THREAD);
4000 Exceptions::fthrow(
4001 THREAD_AND_LOCATION,
4002 vmSymbols::java_lang_IllegalAccessError(),
4003 "class %s cannot access its superclass %s",
4004 this_klass->external_name(),
4005 instanceKlass::cast(super)->external_name()
4006 );
4007 return;
4008 }
4009 }
4012 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
4013 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces());
4014 int lng = local_interfaces->length();
4015 for (int i = lng - 1; i >= 0; i--) {
4016 klassOop k = klassOop(local_interfaces->obj_at(i));
4017 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface");
4018 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) {
4019 ResourceMark rm(THREAD);
4020 Exceptions::fthrow(
4021 THREAD_AND_LOCATION,
4022 vmSymbols::java_lang_IllegalAccessError(),
4023 "class %s cannot access its superinterface %s",
4024 this_klass->external_name(),
4025 instanceKlass::cast(k)->external_name()
4026 );
4027 return;
4028 }
4029 }
4030 }
4033 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
4034 objArrayHandle methods (THREAD, this_klass->methods());
4035 int num_methods = methods->length();
4037 // go thru each method and check if it overrides a final method
4038 for (int index = 0; index < num_methods; index++) {
4039 methodOop m = (methodOop)methods->obj_at(index);
4041 // skip private, static and <init> methods
4042 if ((!m->is_private()) &&
4043 (!m->is_static()) &&
4044 (m->name() != vmSymbols::object_initializer_name())) {
4046 Symbol* name = m->name();
4047 Symbol* signature = m->signature();
4048 klassOop k = this_klass->super();
4049 methodOop super_m = NULL;
4050 while (k != NULL) {
4051 // skip supers that don't have final methods.
4052 if (k->klass_part()->has_final_method()) {
4053 // lookup a matching method in the super class hierarchy
4054 super_m = instanceKlass::cast(k)->lookup_method(name, signature);
4055 if (super_m == NULL) {
4056 break; // didn't find any match; get out
4057 }
4059 if (super_m->is_final() &&
4060 // matching method in super is final
4061 (Reflection::verify_field_access(this_klass->as_klassOop(),
4062 super_m->method_holder(),
4063 super_m->method_holder(),
4064 super_m->access_flags(), false))
4065 // this class can access super final method and therefore override
4066 ) {
4067 ResourceMark rm(THREAD);
4068 Exceptions::fthrow(
4069 THREAD_AND_LOCATION,
4070 vmSymbols::java_lang_VerifyError(),
4071 "class %s overrides final method %s.%s",
4072 this_klass->external_name(),
4073 name->as_C_string(),
4074 signature->as_C_string()
4075 );
4076 return;
4077 }
4079 // continue to look from super_m's holder's super.
4080 k = instanceKlass::cast(super_m->method_holder())->super();
4081 continue;
4082 }
4084 k = k->klass_part()->super();
4085 }
4086 }
4087 }
4088 }
4091 // assumes that this_klass is an interface
4092 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
4093 assert(this_klass->is_interface(), "not an interface");
4094 objArrayHandle methods (THREAD, this_klass->methods());
4095 int num_methods = methods->length();
4097 for (int index = 0; index < num_methods; index++) {
4098 methodOop m = (methodOop)methods->obj_at(index);
4099 // if m is static and not the init method, throw a verify error
4100 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4101 ResourceMark rm(THREAD);
4102 Exceptions::fthrow(
4103 THREAD_AND_LOCATION,
4104 vmSymbols::java_lang_VerifyError(),
4105 "Illegal static method %s in interface %s",
4106 m->name()->as_C_string(),
4107 this_klass->external_name()
4108 );
4109 return;
4110 }
4111 }
4112 }
4114 // utility methods for format checking
4116 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
4117 if (!_need_verify) { return; }
4119 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4120 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4121 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4122 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4123 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4124 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4125 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4127 if ((is_abstract && is_final) ||
4128 (is_interface && !is_abstract) ||
4129 (is_interface && major_gte_15 && (is_super || is_enum)) ||
4130 (!is_interface && major_gte_15 && is_annotation)) {
4131 ResourceMark rm(THREAD);
4132 Exceptions::fthrow(
4133 THREAD_AND_LOCATION,
4134 vmSymbols::java_lang_ClassFormatError(),
4135 "Illegal class modifiers in class %s: 0x%X",
4136 _class_name->as_C_string(), flags
4137 );
4138 return;
4139 }
4140 }
4142 bool ClassFileParser::has_illegal_visibility(jint flags) {
4143 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4144 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4145 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4147 return ((is_public && is_protected) ||
4148 (is_public && is_private) ||
4149 (is_protected && is_private));
4150 }
4152 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
4153 u2 max_version =
4154 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION :
4155 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION);
4156 return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4157 (major <= max_version) &&
4158 ((major != max_version) ||
4159 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4160 }
4162 void ClassFileParser::verify_legal_field_modifiers(
4163 jint flags, bool is_interface, TRAPS) {
4164 if (!_need_verify) { return; }
4166 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4167 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4168 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4169 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4170 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4171 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4172 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4173 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4174 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4176 bool is_illegal = false;
4178 if (is_interface) {
4179 if (!is_public || !is_static || !is_final || is_private ||
4180 is_protected || is_volatile || is_transient ||
4181 (major_gte_15 && is_enum)) {
4182 is_illegal = true;
4183 }
4184 } else { // not interface
4185 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4186 is_illegal = true;
4187 }
4188 }
4190 if (is_illegal) {
4191 ResourceMark rm(THREAD);
4192 Exceptions::fthrow(
4193 THREAD_AND_LOCATION,
4194 vmSymbols::java_lang_ClassFormatError(),
4195 "Illegal field modifiers in class %s: 0x%X",
4196 _class_name->as_C_string(), flags);
4197 return;
4198 }
4199 }
4201 void ClassFileParser::verify_legal_method_modifiers(
4202 jint flags, bool is_interface, Symbol* name, TRAPS) {
4203 if (!_need_verify) { return; }
4205 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4206 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4207 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4208 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4209 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4210 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4211 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4212 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4213 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4214 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4215 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4217 bool is_illegal = false;
4219 if (is_interface) {
4220 if (!is_abstract || !is_public || is_static || is_final ||
4221 is_native || (major_gte_15 && (is_synchronized || is_strict))) {
4222 is_illegal = true;
4223 }
4224 } else { // not interface
4225 if (is_initializer) {
4226 if (is_static || is_final || is_synchronized || is_native ||
4227 is_abstract || (major_gte_15 && is_bridge)) {
4228 is_illegal = true;
4229 }
4230 } else { // not initializer
4231 if (is_abstract) {
4232 if ((is_final || is_native || is_private || is_static ||
4233 (major_gte_15 && (is_synchronized || is_strict)))) {
4234 is_illegal = true;
4235 }
4236 }
4237 if (has_illegal_visibility(flags)) {
4238 is_illegal = true;
4239 }
4240 }
4241 }
4243 if (is_illegal) {
4244 ResourceMark rm(THREAD);
4245 Exceptions::fthrow(
4246 THREAD_AND_LOCATION,
4247 vmSymbols::java_lang_ClassFormatError(),
4248 "Method %s in class %s has illegal modifiers: 0x%X",
4249 name->as_C_string(), _class_name->as_C_string(), flags);
4250 return;
4251 }
4252 }
4254 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4255 assert(_need_verify, "only called when _need_verify is true");
4256 int i = 0;
4257 int count = length >> 2;
4258 for (int k=0; k<count; k++) {
4259 unsigned char b0 = buffer[i];
4260 unsigned char b1 = buffer[i+1];
4261 unsigned char b2 = buffer[i+2];
4262 unsigned char b3 = buffer[i+3];
4263 // For an unsigned char v,
4264 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4265 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4266 unsigned char res = b0 | b0 - 1 |
4267 b1 | b1 - 1 |
4268 b2 | b2 - 1 |
4269 b3 | b3 - 1;
4270 if (res >= 128) break;
4271 i += 4;
4272 }
4273 for(; i < length; i++) {
4274 unsigned short c;
4275 // no embedded zeros
4276 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4277 if(buffer[i] < 128) {
4278 continue;
4279 }
4280 if ((i + 5) < length) { // see if it's legal supplementary character
4281 if (UTF8::is_supplementary_character(&buffer[i])) {
4282 c = UTF8::get_supplementary_character(&buffer[i]);
4283 i += 5;
4284 continue;
4285 }
4286 }
4287 switch (buffer[i] >> 4) {
4288 default: break;
4289 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4290 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4291 case 0xC: case 0xD: // 110xxxxx 10xxxxxx
4292 c = (buffer[i] & 0x1F) << 6;
4293 i++;
4294 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4295 c += buffer[i] & 0x3F;
4296 if (_major_version <= 47 || c == 0 || c >= 0x80) {
4297 // for classes with major > 47, c must a null or a character in its shortest form
4298 break;
4299 }
4300 }
4301 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4302 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
4303 c = (buffer[i] & 0xF) << 12;
4304 i += 2;
4305 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4306 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4307 if (_major_version <= 47 || c >= 0x800) {
4308 // for classes with major > 47, c must be in its shortest form
4309 break;
4310 }
4311 }
4312 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4313 } // end of switch
4314 } // end of for
4315 }
4317 // Checks if name is a legal class name.
4318 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
4319 if (!_need_verify || _relax_verify) { return; }
4321 char buf[fixed_buffer_size];
4322 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4323 unsigned int length = name->utf8_length();
4324 bool legal = false;
4326 if (length > 0) {
4327 char* p;
4328 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4329 p = skip_over_field_signature(bytes, false, length, CHECK);
4330 legal = (p != NULL) && ((p - bytes) == (int)length);
4331 } else if (_major_version < JAVA_1_5_VERSION) {
4332 if (bytes[0] != '<') {
4333 p = skip_over_field_name(bytes, true, length);
4334 legal = (p != NULL) && ((p - bytes) == (int)length);
4335 }
4336 } else {
4337 // 4900761: relax the constraints based on JSR202 spec
4338 // Class names may be drawn from the entire Unicode character set.
4339 // Identifiers between '/' must be unqualified names.
4340 // The utf8 string has been verified when parsing cpool entries.
4341 legal = verify_unqualified_name(bytes, length, LegalClass);
4342 }
4343 }
4344 if (!legal) {
4345 ResourceMark rm(THREAD);
4346 Exceptions::fthrow(
4347 THREAD_AND_LOCATION,
4348 vmSymbols::java_lang_ClassFormatError(),
4349 "Illegal class name \"%s\" in class file %s", bytes,
4350 _class_name->as_C_string()
4351 );
4352 return;
4353 }
4354 }
4356 // Checks if name is a legal field name.
4357 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
4358 if (!_need_verify || _relax_verify) { return; }
4360 char buf[fixed_buffer_size];
4361 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4362 unsigned int length = name->utf8_length();
4363 bool legal = false;
4365 if (length > 0) {
4366 if (_major_version < JAVA_1_5_VERSION) {
4367 if (bytes[0] != '<') {
4368 char* p = skip_over_field_name(bytes, false, length);
4369 legal = (p != NULL) && ((p - bytes) == (int)length);
4370 }
4371 } else {
4372 // 4881221: relax the constraints based on JSR202 spec
4373 legal = verify_unqualified_name(bytes, length, LegalField);
4374 }
4375 }
4377 if (!legal) {
4378 ResourceMark rm(THREAD);
4379 Exceptions::fthrow(
4380 THREAD_AND_LOCATION,
4381 vmSymbols::java_lang_ClassFormatError(),
4382 "Illegal field name \"%s\" in class %s", bytes,
4383 _class_name->as_C_string()
4384 );
4385 return;
4386 }
4387 }
4389 // Checks if name is a legal method name.
4390 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
4391 if (!_need_verify || _relax_verify) { return; }
4393 assert(name != NULL, "method name is null");
4394 char buf[fixed_buffer_size];
4395 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4396 unsigned int length = name->utf8_length();
4397 bool legal = false;
4399 if (length > 0) {
4400 if (bytes[0] == '<') {
4401 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4402 legal = true;
4403 }
4404 } else if (_major_version < JAVA_1_5_VERSION) {
4405 char* p;
4406 p = skip_over_field_name(bytes, false, length);
4407 legal = (p != NULL) && ((p - bytes) == (int)length);
4408 } else {
4409 // 4881221: relax the constraints based on JSR202 spec
4410 legal = verify_unqualified_name(bytes, length, LegalMethod);
4411 }
4412 }
4414 if (!legal) {
4415 ResourceMark rm(THREAD);
4416 Exceptions::fthrow(
4417 THREAD_AND_LOCATION,
4418 vmSymbols::java_lang_ClassFormatError(),
4419 "Illegal method name \"%s\" in class %s", bytes,
4420 _class_name->as_C_string()
4421 );
4422 return;
4423 }
4424 }
4427 // Checks if signature is a legal field signature.
4428 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
4429 if (!_need_verify) { return; }
4431 char buf[fixed_buffer_size];
4432 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4433 unsigned int length = signature->utf8_length();
4434 char* p = skip_over_field_signature(bytes, false, length, CHECK);
4436 if (p == NULL || (p - bytes) != (int)length) {
4437 throwIllegalSignature("Field", name, signature, CHECK);
4438 }
4439 }
4441 // Checks if signature is a legal method signature.
4442 // Returns number of parameters
4443 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
4444 if (!_need_verify) {
4445 // make sure caller's args_size will be less than 0 even for non-static
4446 // method so it will be recomputed in compute_size_of_parameters().
4447 return -2;
4448 }
4450 unsigned int args_size = 0;
4451 char buf[fixed_buffer_size];
4452 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4453 unsigned int length = signature->utf8_length();
4454 char* nextp;
4456 // The first character must be a '('
4457 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4458 length--;
4459 // Skip over legal field signatures
4460 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4461 while ((length > 0) && (nextp != NULL)) {
4462 args_size++;
4463 if (p[0] == 'J' || p[0] == 'D') {
4464 args_size++;
4465 }
4466 length -= nextp - p;
4467 p = nextp;
4468 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4469 }
4470 // The first non-signature thing better be a ')'
4471 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4472 length--;
4473 if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
4474 // All internal methods must return void
4475 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
4476 return args_size;
4477 }
4478 } else {
4479 // Now we better just have a return value
4480 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4481 if (nextp && ((int)length == (nextp - p))) {
4482 return args_size;
4483 }
4484 }
4485 }
4486 }
4487 // Report error
4488 throwIllegalSignature("Method", name, signature, CHECK_0);
4489 return 0;
4490 }
4493 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4494 // Method names also may not contain the characters '<' or '>', unless <init>
4495 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4496 // method. Because these names have been checked as special cases before
4497 // calling this method in verify_legal_method_name.
4498 bool ClassFileParser::verify_unqualified_name(
4499 char* name, unsigned int length, int type) {
4500 jchar ch;
4502 for (char* p = name; p != name + length; ) {
4503 ch = *p;
4504 if (ch < 128) {
4505 p++;
4506 if (ch == '.' || ch == ';' || ch == '[' ) {
4507 return false; // do not permit '.', ';', or '['
4508 }
4509 if (type != LegalClass && ch == '/') {
4510 return false; // do not permit '/' unless it's class name
4511 }
4512 if (type == LegalMethod && (ch == '<' || ch == '>')) {
4513 return false; // do not permit '<' or '>' in method names
4514 }
4515 } else {
4516 char* tmp_p = UTF8::next(p, &ch);
4517 p = tmp_p;
4518 }
4519 }
4520 return true;
4521 }
4524 // Take pointer to a string. Skip over the longest part of the string that could
4525 // be taken as a fieldname. Allow '/' if slash_ok is true.
4526 // Return a pointer to just past the fieldname.
4527 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4528 // being true, we saw consecutive slashes (meaning we were looking for a
4529 // qualified path but found something that was badly-formed).
4530 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
4531 char* p;
4532 jchar ch;
4533 jboolean last_is_slash = false;
4534 jboolean not_first_ch = false;
4536 for (p = name; p != name + length; not_first_ch = true) {
4537 char* old_p = p;
4538 ch = *p;
4539 if (ch < 128) {
4540 p++;
4541 // quick check for ascii
4542 if ((ch >= 'a' && ch <= 'z') ||
4543 (ch >= 'A' && ch <= 'Z') ||
4544 (ch == '_' || ch == '$') ||
4545 (not_first_ch && ch >= '0' && ch <= '9')) {
4546 last_is_slash = false;
4547 continue;
4548 }
4549 if (slash_ok && ch == '/') {
4550 if (last_is_slash) {
4551 return NULL; // Don't permit consecutive slashes
4552 }
4553 last_is_slash = true;
4554 continue;
4555 }
4556 } else {
4557 jint unicode_ch;
4558 char* tmp_p = UTF8::next_character(p, &unicode_ch);
4559 p = tmp_p;
4560 last_is_slash = false;
4561 // Check if ch is Java identifier start or is Java identifier part
4562 // 4672820: call java.lang.Character methods directly without generating separate tables.
4563 EXCEPTION_MARK;
4564 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
4566 // return value
4567 JavaValue result(T_BOOLEAN);
4568 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4569 JavaCallArguments args;
4570 args.push_int(unicode_ch);
4572 // public static boolean isJavaIdentifierStart(char ch);
4573 JavaCalls::call_static(&result,
4574 klass,
4575 vmSymbols::isJavaIdentifierStart_name(),
4576 vmSymbols::int_bool_signature(),
4577 &args,
4578 THREAD);
4580 if (HAS_PENDING_EXCEPTION) {
4581 CLEAR_PENDING_EXCEPTION;
4582 return 0;
4583 }
4584 if (result.get_jboolean()) {
4585 continue;
4586 }
4588 if (not_first_ch) {
4589 // public static boolean isJavaIdentifierPart(char ch);
4590 JavaCalls::call_static(&result,
4591 klass,
4592 vmSymbols::isJavaIdentifierPart_name(),
4593 vmSymbols::int_bool_signature(),
4594 &args,
4595 THREAD);
4597 if (HAS_PENDING_EXCEPTION) {
4598 CLEAR_PENDING_EXCEPTION;
4599 return 0;
4600 }
4602 if (result.get_jboolean()) {
4603 continue;
4604 }
4605 }
4606 }
4607 return (not_first_ch) ? old_p : NULL;
4608 }
4609 return (not_first_ch) ? p : NULL;
4610 }
4613 // Take pointer to a string. Skip over the longest part of the string that could
4614 // be taken as a field signature. Allow "void" if void_ok.
4615 // Return a pointer to just past the signature.
4616 // Return NULL if no legal signature is found.
4617 char* ClassFileParser::skip_over_field_signature(char* signature,
4618 bool void_ok,
4619 unsigned int length,
4620 TRAPS) {
4621 unsigned int array_dim = 0;
4622 while (length > 0) {
4623 switch (signature[0]) {
4624 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4625 case JVM_SIGNATURE_BOOLEAN:
4626 case JVM_SIGNATURE_BYTE:
4627 case JVM_SIGNATURE_CHAR:
4628 case JVM_SIGNATURE_SHORT:
4629 case JVM_SIGNATURE_INT:
4630 case JVM_SIGNATURE_FLOAT:
4631 case JVM_SIGNATURE_LONG:
4632 case JVM_SIGNATURE_DOUBLE:
4633 return signature + 1;
4634 case JVM_SIGNATURE_CLASS: {
4635 if (_major_version < JAVA_1_5_VERSION) {
4636 // Skip over the class name if one is there
4637 char* p = skip_over_field_name(signature + 1, true, --length);
4639 // The next character better be a semicolon
4640 if (p && (p - signature) > 1 && p[0] == ';') {
4641 return p + 1;
4642 }
4643 } else {
4644 // 4900761: For class version > 48, any unicode is allowed in class name.
4645 length--;
4646 signature++;
4647 while (length > 0 && signature[0] != ';') {
4648 if (signature[0] == '.') {
4649 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4650 }
4651 length--;
4652 signature++;
4653 }
4654 if (signature[0] == ';') { return signature + 1; }
4655 }
4657 return NULL;
4658 }
4659 case JVM_SIGNATURE_ARRAY:
4660 array_dim++;
4661 if (array_dim > 255) {
4662 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4663 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4664 }
4665 // The rest of what's there better be a legal signature
4666 signature++;
4667 length--;
4668 void_ok = false;
4669 break;
4671 default:
4672 return NULL;
4673 }
4674 }
4675 return NULL;
4676 }